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Journal articles on the topic 'Crank mechanism'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 May 2022

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1

Cheng, Shouguo, and Shulin Liu. "Dynamic Analysis of Slider-Crank Mechanism with a Cracked Rod." Mathematical Problems in Engineering 2018 (September 2, 2018): 1–7. http://dx.doi.org/10.1155/2018/8540546.

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The dynamical equation of the slider-crank mechanism is established by using Lagrange equation and Newton’s second law. The slider-crank mechanism with an open crack rod is investigated and then establishes the equivalent mechanics model by a massless torsional spring to simulate the influence of the crack in the rod, and the mechanism of a cracked rod is divided into two subsystems. The dynamical equation of the slider-crank mechanism with a crack rod is established. Comparing the dynamic analysis results between with and without crack in the rod, the results show that the existence of the crack leads to a great change in the motion characteristics of the slider. The calculated maximum Lyapunov exponent is positive, which shows that the movement of the slider in the crank slider mechanism with a cracked rod is chaotic.

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2

Al-Sabeeh, A. K. "Double Crank External Geneva Mechanism." Journal of Mechanical Design 115, no. 3 (September 1, 1993): 666–70. http://dx.doi.org/10.1115/1.2919242.

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A designer specified motion characteristics can be obtained using the double crank external Geneva mechanism presented in this work. This mechanism basically consists of double cranks and double curved slots that work together in generating the desired output motion. In other words, the profiles of the slots are defined based on the specified output motion. This feature opens the door for big motion improvements, such as minimizing the maximum acceleration and eliminating infinite jerk. Furthermore, it allows for stepping angles larger than 120 deg (the upper limit for simple Geneva mechanism) and even operates at smaller overall pressure angle. In this paper, the equations defining the slot profiles for some desired output motion are derived. The expression for the pressure angle as a function of the crank displacement angle is obtained. The equations are put into application by an example design of double slotted replacement Geneva mechanism, showing the applicability of the approach and the improvement gained in reducing the pressure angle.

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3

Basu, P. S., and K. Farhang. "Kinematic Analysis and Design of Two-Input, Five-Bar Mechanisms Driven by Relatively Small Cranks." Journal of Mechanical Design 116, no. 4 (December 1, 1994): 1108–14. http://dx.doi.org/10.1115/1.2919494.

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Single-input mechanisms driven by relatively small cranks have been shown to have output link motions, describable as approximately simple harmonic functions of the input crank angular displacement. This paper presents a mathematical formulation for the approximate analysis and design of two-input, small-crank five-bar mechanisms for function generation. A perturbation technique is employed for the derivation of the approximate equations. Coefficients of the harmonic terms in the equations for an output link motion are obtained from the mechanism geometry and application of the perturbation technique. The output link motion is shown to be approximately described by a linear combination of two simple harmonic functions, in terms of the two input crank angles. Two mechanism design examples are presented to demonstrate the utility of the analytical development in the synthesis of five-bar mechanisms for function generation.

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4

Zhou, Sheng Cai, Da Zhang You, and Jiao Chen. "Design of Rice Transplanter." Applied Mechanics and Materials 488-489 (January 2014): 862–65. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.862.

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This text mainly completed the design of rice transplanters transplanting mechanism and the driving mechanism. Transplanting mechanism, the main working parts in rice transplanter, determines the quality and efficiency of mechanical planting. The paper adopts the crank rocker mechanism as a transplanting mechanism with a simple design and a high quality of planting. Driving mechanism can make the device operate accurately and reliably in a given trajectory and state. The driving mechanism driven by the diesel engine will transmit the power to the worm shaft through the coupler. Operated by the worm gear and worm drive, the power will be transmitted to the crank on the crank rocker of the transplanting mechanism through the chain transmission, making the cranks planting action in a given fixed path, then ensuring that the seedling smoothly and inserted straightly.

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5

Abdulkadir, Tukur D., Muhammad R. Mahadi, Aimrun Wayayok, and Muhamad S. M. Kassim. "Analytical Comparison between the Speed of Screw and Crank-Rocker Based Pick and Place Mechanisms for Seedling Tray Seeding Machine." Basrah Journal of Agricultural Sciences 34 (August 20, 2021): 138–48. http://dx.doi.org/10.37077/25200860.2021.34.sp1.14.

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In this study the operational speed of screw based pick and place mechanism was compared with that of a crank-rocker based pick and place mechanism analytically for the design of a seeding machine for system of rice intensification (SRI) seedling tray. The configurations of the two types of mechanisms were generated based on their positions relative to a seedling tray conveyor and size of seeding manifold. The screw based mechanism consists of a vertical screw to which the seeding manifold was mounted and a horizontal screw to which the vertical mechanism was mounted. The vertical screw bearing the seeding manifold reciprocates down to pick seeds from seed container and back to the initial position. The horizontal screw translates horizontally to deliver the vertical screw bearing the seeding manifold to the seedling tray on the conveyor. The crank-rocker based mechanism consists of a pair of crank-rocker carrying a seeding manifold in between them. The mechanism rotates clock wise to pick seed and counter clock wise to drop the seed on the seedling tray. The time required for a complete pick and place circle was computed for both mechanisms using basic mechanics principles. Crank-rocker mechanism with a theoretical pick and place period of 1 second was found to be better than the screw based mechanism with 78.8 second per pick and place circle.

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6

Abdulkadir, Tukur D., Muhammad R. Mahadi, Aimrun Wayayok, and Muhamad S. M. Kassim. "Analytical Comparison between the Speed of Screw and Crank-Rocker BasedPick and Place Mechanisms for Seedling Tray Seeding Machine." Basrah Journal of Agricultural Sciences 34 (August 20, 2021): 108–18. http://dx.doi.org/10.37077/25200860.2021.34.sp1.12.

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In this study the operational speed of screw based pick and place mechanism was compared with that of a crank-rocker based pick and place mechanism analytically for the design of a seeding machine for system of rice intensification (SRI) seedling tray. The configurations of the two types of mechanisms were generated based on their positions relative to a seedling tray conveyor, seed container and size of seeding manifold. The screw based mechanism consists of a vertical screw to which the seeding manifold was mounted and a horizontal screw to which the vertical mechanism was mounted. The vertical screw bearing the seeding manifold reciprocates down to pick seeds from seed container and back to the initial position. The horizontal screw translates horizontally to deliver the vertical screw bearing the seeding manifold to the seedling tray on the conveyor. The crank-rocker based mechanism consists of a pair of crank-rocker carrying a seeding manifold in between them. The mechanism rotates clock wise to pick seed and counter clock wise to drop the seed on the seedling tray. The time required for a complete pick and place circle was computed for both mechanisms using basic mechanics principles. Crank-rocker mechanism with a theoretical pick and place period of 1 second was found to be better than the screw based mechanism with 78.8 second per pick and place circle.

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7

Tomić, Miša, Miloš Milošević, Nevena Tomić, Nenad D. Pavlović, and Vukašin Pavlović. "REMOTE CONTROL OF THE MECHATRONIC REDESIGNED SLIDER-CRANK MECHANISM IN SERVICE." Facta Universitatis, Series: Mechanical Engineering 15, no. 2 (August 2, 2017): 257. http://dx.doi.org/10.22190/fume170510013t.

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Slider-crank mechanisms are used in many machines where there is a need to transform rotary motion into translation, and vice versa. Implementation of the control into a mechanical assembly of the slider-crank mechanism offers a wide range of applications of such controlled mechanism in mechatronic systems. This paper shows an example of the remote control of the angular velocity of the crank in a mechatronic redesigned slider-crank mechanism in order to achieve the desired motion of the slider. The remote control is achieved over the Internet connection and the appropriate software which is executed in the user’s internet browser. The aim of this paper is to present the applied control algorithm as well as to explain advantages of the possibility to remotely run a mechatronic redesigned slider-crank mechanism in service. This is done through an example of using a controlled slider-crank mechanism in a remote laboratory experiment.

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8

Wang, Hao Dong, Yi Hong Sun, and Jing Chun Chen. "Development of Shaking Table for Rapid Detection System of Microorganisms." Applied Mechanics and Materials 775 (July 2015): 394–98. http://dx.doi.org/10.4028/www.scientific.net/amm.775.394.

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Shaking table is an important component in rapid detection system of microorganisms. Based on the discussion regarding the advantage and shortage of the shaking table, this paper proposed a simple, reliable, and low-cost automatic shaking table. Three mechanisms were discussed with the achievement of reciprocating motion: slide-crank mechanism, follower-cam mechanism, and incomplete gear mechanism. The three mechanisms were compared in mechanical motion pair, motion form, component design, and manufacturing process. The slide-crank mechanism was finally determined. To overcome the strong oscillation of the liquid in the test tube along a single direction, this paper improved the slider-crank mechanism, and whose trajectory was modified into an irregular circle.

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9

KOMURA, Hirotaka, Gen ENDO, and Koichi SUZUMORI. "Development of Novel Crank Wheel Mechanism ”Eccentric Crank Rover”." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2016 (2016): 2A2–08a1. http://dx.doi.org/10.1299/jsmermd.2016.2a2-08a1.

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10

Qian, Yu, Yi Cao, Yuan Wei Liu, and Hui Zhou. "Forward Kinematics Simulation Analysis of Slider-Crank Mechanism." Advanced Materials Research 308-310 (August 2011): 1855–59. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1855.

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This paper mainly addressed the kinematics simulation of the Slider-Crank mechanism. After proposing a mathematical model for the forward displacement of the slider-crank mechanism, the mathematical models for the forward velocity and acceleration of the slider-crank mechanism are constructed, respectively and the simulation models for the forward kinematics of the slider-crank mechanism are constituted in the Matlab/Simulink simulation platform. Finally the forward kinematics simulation of the slider-crank mechanism was successfully accomplished based on Matlab/Simulink. Examples of the simulation for the forward kinematics of a slider-crank mechanism are given to demonstrate the above-mentioned theoretical results.

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11

Sun, Wei Fang, Xiang Zhou Zheng, and Jing Rui Liang. "Dynamics of Flexible Slider-Crank Mechanism Based on the Floating Frame Reference Formulation." Applied Mechanics and Materials 456 (October 2013): 330–33. http://dx.doi.org/10.4028/www.scientific.net/amm.456.330.

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The slider-crank mechanism is a special case of the four bar linkage which is widely used in reciprocating machines. Flexible multi-body mechanisms that gain some motion through the deflection of flexible elements are classified as compliant mechanisms. Dynamics of flexible slider-crank mechanisms is presented in this paper. Both rigid and flexible parts are included in the slider-crank mechanisms. As one of the widely accepted dynamic analytical method for the multi-body system modeling, floating frame reference formulation has been applied to derive dynamic formulations. Simulations of dynamics of flexible slider-crank mechanisms have been carried out using Matlab. It was shown that flexibility of parts has a certain extent effects on mechanical properties of flexible system that disagree with that of rigid ones. Keywords: Floating frame reference formulation; Slider-crank; Deformation; Flexible multi-body

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12

Jomartov, A. A., S. U. Joldasbekov, and Yu M. Drakunov. "Dynamic synthesis of machine with slider-crank mechanism." Mechanical Sciences 6, no. 1 (April 2, 2015): 35–40. http://dx.doi.org/10.5194/ms-6-35-2015.

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Abstract. In this paper we consider the formulation and solution of the task of a dynamic synthesis machine with an asynchronous electric motor and a slider-crank mechanism. The constant parameters of the slider-crank mechanism (mass and moments of inertia and centers of gravity of links) and the parameters of the electrical motor are defined. The laws of motion of the machine and kinematic parameters of the mechanism are considered as given. We have developed the method of optimal dynamic synthesis of the machine, which consists of an asynchronous electric motor and a slider-crank mechanism. The criterion of optimization of the dynamic synthesis of a machine is the root mean square sum of the moments of driving forces, the forces of resistance and inertia forces which are reduced to the axis of rotation of the crank. The method of optimal dynamic synthesis of a machine can be used in the design of new and the improvement of known mechanisms and machines.

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13

Akbari, Samin, Fatemeh Fallahi, and Tohid Pirbodaghi. "Dynamic analysis and controller design for a slider–crank mechanism with piezoelectric actuators." Journal of Computational Design and Engineering 3, no. 4 (June 3, 2016): 312–21. http://dx.doi.org/10.1016/j.jcde.2016.05.002.

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Abstract Dynamic behaviour of a slider–crank mechanism associated with a smart flexible connecting rod is investigated. Effect of various mechanisms' parameters including crank length, flexibility of the connecting rod and the slider's mass on the dynamic behaviour is studied. Two control schemes are proposed for elastodynamic vibration suppression of the flexible connecting rod and also obtaining a constant angular velocity for the crank. The first scheme is based on feedback linearization approach and the second one is based on a sliding mode controller. The input signals are applied by an electric motor located at the crank ground joint, and two layers of piezoelectric film bonded to the top and bottom surfaces of the connecting rod. Both of the controllers successfully suppress the vibrations of the elastic linkage. Highlights Dynamic behaviour of a slider–crank mechanism associated with a smart flexible connecting rod is investigated. Effect of various mechanisms' parameters including crank length, flexibility of the connecting rod and the slider's mass on the dynamic behaviour is studied. Two control schemes are proposed for elastodynamic vibration suppression of the flexible connecting rod and also obtaining a constant angular velocity for the crank. Controllers are based on feedback linearization approach and sliding mode controller.

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14

Ou, Feng-Ming, Hong-Sen Yan, and Ming-Feng Tang. "THE SYNTHESIS OF MECHANISM SYSTEMS USING A MECHANISM CONCEPT LIBRARY." Transactions of the Canadian Society for Mechanical Engineering 34, no. 1 (March 2010): 151–63. http://dx.doi.org/10.1139/tcsme-2010-0010.

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This paper presents an approach for synthesizing all possible mechanism systems of kinematic building blocks in a mechanism concept library. The kinematic building blocks are defined as SISO primitive mechanisms, and their serial and/or parallel combinations are expressed as corresponding out-trees based on graph representation. By representing the constructive building blocks as labeled vertices and their possible combination relationships as directed edges, the synthesis approach is developed by adopting graph enumeration theorem. An illustrative example of four kinematic building blocks, including two crank-rocker linkages and two slider-crank mechanisms, is provided to validate the presented approach. The result shows that all feasible mechanism systems can be obtained effectively by following the synthesis method and which provides more alternatives in the library during design or re-design of mechanisms.

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15

Chuang, Chin Wen, Kuan Yu Chen, and Yi Hua Su. "Identifying the Slider-Crank Mechanism System by the MPSO Method." International Journal of Trend in Scientific Research and Development Volume-2, Issue-6 (October 31, 2018): 181–88. http://dx.doi.org/10.31142/ijtsrd18413.

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16

Mallik, A. K. "Mobility Analysis and Type Identification of Four-Link Mechanisms." Journal of Mechanical Design 116, no. 2 (June 1, 1994): 629–33. http://dx.doi.org/10.1115/1.2919424.

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An alternative derivation of the simple criteria, in terms of linkage parameters, demarking the zones of nonexistence of double-crank and crank-rocker RSSR mechanisms is presented. The existence of a crank is verified by polynomial discriminants of the limit position. Closed from solutions are obtained for type identification for 4R spherical, RCCC, RSSP, and planar 4R mechanisms by treating these as the limiting cases of an RSSR mechanism.

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17

Lee, Heow-Pueh. "Dynamics of a Flexible Rod in a Quick Return Mechanism." Journal of Mechanical Design 116, no. 1 (March 1, 1994): 70–74. http://dx.doi.org/10.1115/1.2919379.

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The equations of motion in matrix form are formulated for a flexible rod in a quick return mechanism using Hamilton’s principle and the assumed mode method. The rod is considered as an Euler beam. The crank is assumed to be rigid and rotating at a constant angular speed. The translating-rotating joint connecting the crank to the flexible rod is assumed to be a frictionless moving point support for the flexible rod. This support is regarded as a very stiff spring acting on the rotating flexible rod. Results of numerical simulations are presented for various prescribed crank positions, crank lengths, and crank speeds.

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18

Wu, Ying, and Xu Zhou. "Simulation Research of Six-Bar Slider-Crank Mechanism." Advanced Materials Research 655-657 (January 2013): 568–72. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.568.

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For being convenient for researching the force transmission characteristic and the improvement and use of six-bar slider-crank mechanism, for improving the dynamic work efficiency, for reducing energy consumption, the three-dimensional solid model of the mechanism was established with ADAMS. Each part of the model in ADAMS was set up. Simulation analysis on the working process of the mechanism was achieved. The structure optimization parameters of the mechanism were obtained. The result proves that the locations of revolute joint of rocker and frame, the locations of revolute joint of link and block, the vertical location of revolute joint of upper link and rocker, the horizontal locations of revolute joint of upper link and link are almost no impact on the driving torque of crank. The locations of revolute joint of crank and upper link, the horizontal location of revolute joint of upper link and rocker, the vertical location of revolute joint of upper link and link have less impact on the driving torque of crank. The locations of revolute joint of crank and frame have greater impact on the maximum driving torque of crank.

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19

Liu, Yansong, Jujiang Cao, Sheng Ren, and Yao Wu. "Inertia Force Balance of Crank-Group Driving Mechanism Based on Crank Unit." Open Mechanical Engineering Journal 9, no. 1 (September 16, 2015): 601–4. http://dx.doi.org/10.2174/1874155x01509010601.

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The crank unit is defined as the basic unit of the crank-group driving mechanism for the modular design and production, and the balance methods of inertia force are researched on the crank unit in crank-group driving mechanism’s modular design. The factors affecting the balancing weight’s position and mass are studied. This indicates that the product of the mass and gyration radius of the balancing weight is influenced by the number, mass, length of the crank and the total mass moving rod in the mechanism. The balance method based on the crank unit is received to meet the modular design and production. This approach achieves the balance of crank-group driving mechanism quickly and efficiently.

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20

Hwang, W.-M., and Y.-S. Fan. "Coordination of two crank angles and two acceleration poles for a slider crank mechanism using parametric equations." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 222, no. 3 (March 1, 2008): 483–91. http://dx.doi.org/10.1243/09544062jmes624.

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The current article presents the parametric equations for the synthesis of a slider crank mechanism with a coupler point passing through two specified acceleration poles that accord with two specified crank angles. The parametric equations for the coordinates of the acceleration pole for the coupler with respect to the frame are shown to be functions of only the geometric configuration of the slider crank mechanism driven by the crank with a constant rotational speed. Moreover, a necessary condition for the crank angular interval corresponding to the two acceleration poles on a coupler curve generated by a slider crank mechanism is investigated. The desired coupler point of a given mechanism passing through two acceleration poles should be a double point on the locus of the acceleration pole described on the coupler plane. The transformed parametric equations on the fixed plane are then applied to synthesize the desired mechanism with a coupler point passing through two specified acceleration poles that accord with two specified crank angles.

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21

Chang, De Gong, and Cun Sheng Zhang. "Mechanical System Dynamics Simulation of Crank Linkage Mechanism Based on Pro/E." Advanced Materials Research 295-297 (July 2011): 2548–51. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.2548.

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The simulation analysis and research on crank linkage mechanism, which is the core part of the engine, are of important significance. Based on related theory, this paper introduces a simulation analysis method for crank linkage mechanism, which is using Pro/E. First of all, the 3D model of the mechanism is build; all the components are modeled and assembled. Then dynamic simulation for the crank linkage mechanism by using PRO/Mechanism is carried on, the result of characteristics of motion, stress, etc of the mechanism are shown. A more effective method about the simulation analysis of crank linkage mechanism is introduced in this paper.

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22

Fernandez, Victor. "Characteristics of Slider Crank Mechanism Using Modeling Simulations." ACMIT Proceedings 4, no. 1 (March 19, 2017): 127–35. http://dx.doi.org/10.33555/acmit.v4i1.67.

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This document will analyze the different effects of the length and the angular velocity affecting theperformance of the slider crank system. The performance of the slider crank system is simulated and shownusing MATLAB with reference of the model represented by a mathematical formula. The result of thesimulation is represented by several graphs, showing the relation of the length and angular velocity of therotary motion of the slider crank mechanism and the angle generated by the translational motion of theslider.

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23

Karkoub, M. A., and M. Zribi. "Active damping of the elastodynamic vibrations of a flexible slider-crank mechanism using an energy approach." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 215, no. 1 (March 1, 2001): 7–20. http://dx.doi.org/10.1243/1464419011544303.

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In this paper, the problem of active damping of the elastodynamic vibrations of a flexible slider-crank mechanism is addressed. The slider-crank mechanism is such that the connecting rod is flexible and the crank link is rigid. The slider-crank mechanism system is underactuated since the connecting rod is not directly controlled. A dynamic model for the slider-crank mechanism is derived using the Hamiltonian principle. Then, a control scheme based on an energy approach is proposed. The control scheme uses the passivity of the system to eliminate the vibrations of the flexible connecting rod. Simulation results are given to illustrate the theoretical developments.

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24

ADESOLA, OLADEJO KOLAWOLE, ADEKUNLE NURUDEEN OLATUNDE, ADETAN DARE, ABU RAHAMAN, and ORIOLOWO KOLAWOLE TAOFIK. "DEVELOPMENT AND APPLICATION OF A COMPUTER PROGRAM FOR FOUR-BAR LINKAGE AND SLIDER-CRANK MECHANISMS." Journal of Engineering Studies and Research 26, no. 3 (July 27, 2020): 28–38. http://dx.doi.org/10.29081/jesr.v26i3.204.

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Complex mathematical problems have been solved with the aid of software application to obtain reliable results. The positional kinematic analysis of a slider crank mechanism involves computation of the motion parameters: linear displacement, velocity and acceleration of the slider; and angular velocity and angular acceleration of the connecting rod for every 300 variation of the crank angle. This study aimed to develop a customized software which can be used to efficiently analyse a given design of a four-bar and a slider-crank mechanisms. A program was written using VB (Visual Basic) programming language for the equations of angular velocities and angular acceleration of the coupler and follower for the four-bar linkage and the linear velocity and acceleration of the piston for the slider crank mechanism. The program was tested with different parameters for the mechanisms and the solutions compared with the results from manual calculations. The findings revealed that there were no differences (p ≤ 0.05) between the results using the program and manual calculations, which imply the accuracy of the program. It can be concluded that the program could be used to solve problems of four- bar linkage and slider-crank mechanisms.

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25

Han, Z. G., and Qing Jian Liu. "Dynamic Analysis on Crank-Slider Mechanism of Reciprocating Pump." Materials Science Forum 697-698 (September 2011): 676–80. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.676.

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The crank-slider mechanism is the key component in reciprocating pumps. With the increase of the rotational speed of the crank-slider mechanism, the vibration and working noise of reciprocating pumps increase. Based on the multi-body dynamics theory, the dynamic model of the crank-slider mechanism of reciprocating pumps is proposed. A numerical example is given and the validity of the procedure developed here is demonstrated by analyzing the dynamic behavior of a typical crank-slider mechanism of the reciprocating pump. The model can well simulate the dynamic response of the mechanism, which can enable designers to obtain required information on the analysis and design of reciprocating pumps.

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26

Figliolini, Giorgio, and Pierluigi Rea. "Effects of the design parameters on the synthesis of Geneva mechanisms." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 9 (November 9, 2012): 2000–2009. http://dx.doi.org/10.1177/0954406212466194.

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A general algorithm for the kinematic synthesis of Geneva mechanisms with curved slots is introduced here, when a suitable displacement program is given with the aim of avoiding the typical shock-loading problems of conventional Geneva mechanisms. Moreover, the effects of the design parameters are analyzed through significant numerical examples. These parameters are: number of driving cranks; number of slots; imposed displacement program; and pin radius of the driving crank for the Geneva mechanism.

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27

Bodine, Albert G. "Sonic drill employing orbiting crank mechanism." Journal of the Acoustical Society of America 87, no. 5 (May 1990): 2267. http://dx.doi.org/10.1121/1.399154.

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28

Kukuča, Pavol, Dalibor Barta, Robert Labuda, and Tsvetomir Gechev. "Engine with unconventional crank mechanism FIK1." MATEC Web of Conferences 244 (2018): 03004. http://dx.doi.org/10.1051/matecconf/201824403004.

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The geometry and kinematics of unconventional engine mechanism FIK1 are described in the paper. Transformation of the piston linear movement to rotational movement is done by a swinging board, a baseboard and a crankshaft. The paper describes the trajectory and acceleration of an observed point on the swinging board in all three planes as well as the kinematics of the piston movement. The principle of the unconventional mechanism FIK1 is protected by patents No. 283742 and No. 283743. A mathematical model of the mechanism and some significant results are presented.

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29

Gao, Guang Di, Xin Sheng Bi, and Rong Guang Zhu. "Simulation of Processing Tomato Fruit-Stem Separation Based on Double Crank Mechanism." Advanced Materials Research 588-589 (November 2012): 1269–73. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.1269.

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In this paper, double crank mechanism is put forward to achieve separation of the processing tomato fruit-stem on the basis of analysis of the existing separation mechanism kinematic characteristics, and the rod length ratio of the desired motion characteristics has been gotten by virtual simulation platform based on ADAMS, and the rod lengths of the double crank mechanism ultimately determined are as follows, driving crank is 148mm, active crank is 178mm, link is 222mm, and driven crank is 200mm on the basis of the testing determination of the maturity processing tomato fruit-stem separation force. It is able to meet the fruit and stem separation requirements when the angular velocity of driven crank is 60r/min. It can provide a theoretical basis for engineering practice.

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30

Xie, Liang Xi, Zhi Xiang Tian, Jian Yi Kong, Guo Zhang Jiang, and Gong Fa Li. "Kinematic Analysis of a Spatial 6-Bar Linkage Mechanism." Applied Mechanics and Materials 496-500 (January 2014): 831–35. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.831.

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The door operator in metallurgical equipment is a spatial 6-bar linkage mechanism. The numerical model of motion and force of the mechanism was developed and the numerical solution was applied. A computer simulation was implemented. There is a high level of consistency between the solution and simulation. The torques required on driving crank have been studied. The influences of the self-lock conditions on the crank length and con-rod length have been explored. The effects of the length of crank and con-rode on the needed maximal torques of the crank have been studied, too. And the kinematics analysis attributes the lightening design of the slider structure on the basis of considering the sliders rigidness and intensity.

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31

Yuqi, Wang, and Cao Jujiang. "Study about the New Mechanism Crank-group Driving Mechanism." Journal of Applied Sciences 13, no. 22 (November 1, 2013): 5192–97. http://dx.doi.org/10.3923/jas.2013.5192.5197.

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32

Kobzev, Kirill. "Mathematical model of a drive mechanism with a crank device of a crank press." E3S Web of Conferences 164 (2020): 03051. http://dx.doi.org/10.1051/e3sconf/202016403051.

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The most important link in the forging equipment is a crank mechanism. Their significant drawback is the unbalanced inertia forces of the moving masses of the crank mechanism, which cause vibration. The analysis of the phenomena occurring in the mechanism and the assessment of the technological process are based on the theory of chains, which allows analytically analyzing the dynamic characteristics of systems with a large number of degrees of freedom, based on the analysis of one structural element. The study of the process of force interaction inevitably comes down to the construction of a mathematical model of mechanisms, the formative movement of which leads to its formation. One of the partial systems makes an irregular programmed motion, meaning the crank drive mechanism. In addition, unwanted vibrations caused by kinematic excitation are superimposed on this drive. According to numerous papers on this topic, significant dynamic errors arise due to vibration accelerations. One of the main tasks in reducing the vibration activity and, accordingly, the level of acoustic emission of the process under study is to ensure the required law of motion of the instrument. On this basis, the study of the stability of formative movements is of particular importance. This question is complicated by the fact that in the processing, there is a change in the process parameters and, consequently, in the characteristics of the friction coupling. The latter circumstance presupposes the evolution of the system under study, and therefore the need for process control.

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33

Groza, Doru. "Balancing of a Slider-Crank Mechanism by Using a Counter Mass and a Progressive Spring with Two Rates." Applied Mechanics and Materials 823 (January 2016): 37–42. http://dx.doi.org/10.4028/www.scientific.net/amm.823.37.

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This paper investigates the possibility to individually balance the specific shaking forces and shaking moment of the slider-crank mechanism. The most common mean of balancing the slider crank mechanism is to use a counter mass. This solution is applied for almost every slider-crank mechanism used in commercial mechanical devices. However the nature of the mechanism does not allow a perfect balancing in such a way. The different nature of motions that govern the piston displacement and crank rotation imply that a counter mass can only statically balance the mechanism. An ideal dynamic balancing cannot be achieved this way. Therefore in this paper the excitations that act on the mechanism are split by the nature of motion that generates them and balanced accordingly. Two motions are defined, respectively the motion of the piston and the motion of the crank. The inertia force associated with the crank motion is balanced by building a dynamically equivalent system around the axis of the crankshaft while the excitation associated with the motion of the piston is balanced with a progressive spring with two rates.

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Wang, Yu. "Kinematic Analysis and Optimization Design of an Eccentric Crank Slide-Block Mechanism Based on ADAMS." Advanced Materials Research 189-193 (February 2011): 997–1000. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.997.

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Operating principle and motion characteristics of an eccentric crank slide-block mechanism are analyzed. A virtual prototype model of the eccentric crank slide-block mechanism is set up based on ADAMS,a simulation software. The kinematics analysis of the eccentric crank slide-block mechanism,it is given.Under the premise of meeting the requirements of slide stroke and travel velocity-ratio coefficient, based on ADAMS, each component size of the eccentric crank slide-block mechanism with best pressure angle (α max ) min can be easily obtained. The equations and the calculations can be used in engineering practice.

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Song, Sheng Tao, Rui Qin Li, Yan Gao, and Da Hai Li. "Design and Singularity Analysis for Nine-Bar Mechanism of Three Crank Hybrid Driven." Applied Mechanics and Materials 496-500 (January 2014): 781–84. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.781.

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With two degrees of freedom five-bar linkage as the foundation, carry on the multiple loop coupling, built three crank controllable nine bar mechanism similar to that of the crank slider pressing, which can meet the controlled flexible output, and conform to the mechanical properties of crank slider pressing mechanism. We use the loop analysis method to analyze the singularity of the mechanism. Analysis through two steps, first of all analysis on three crank existence conditions and the entire organization singularity, it is concluded that the condition of mechanism dont have singularity, and according to the singular condition carrying on research of singularity position, the long rod assembly condition is obtained.

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36

Dao, Thanh Phong, and Shyh Chour Huang. "Optimization of Multiresponse Performance Measure in Slider-Rocker Compliant Mechanism Using Fuzzy-Taguchi Method." Advanced Materials Research 683 (April 2013): 708–11. http://dx.doi.org/10.4028/www.scientific.net/amr.683.708.

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This paper focuses on the application of fuzzy logic-Taguchi method for multi-objective optimization of the flexible segment in slider-rocker compliant mechanisms. The input parameters such as input torque and crank angular are optimized with considerations of the multiple performance measures as angular displacement and stress of the flexible segment. The results found that the input torque at level 3 of 60 Nm and crank angular at level 1 of 70 degrees are favorable parameters for compliant flapper mechanism. Based on analysis of variance (ANOVA), the results revealed that input crank angular is the most significant with hightest contribution of 48%.

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37

Nikitin, A. G., A. V. Abramov, and V. V. Garyashin. "MATHEMATICAL MODEL OF CRANK-TYPE JOINT CLEARANCE OVERTRAVEL ASSESSMENT IN OSCILLATING CRANK DRIVE OF JAW CRUSHER." Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy 61, no. 6 (July 28, 2018): 466–69. http://dx.doi.org/10.17073/0368-0797-2018-6-466-469.

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The magnitude decrease of the dynamic loads that arise during the operation of machines in general and metallurgical ones in particular, is one of the main tasks of general problem of increasing their reliability and durability. The analysis of work of lever mechanisms of jaw crusher with internal degrees of freedom conditioned by presence of clearances in hinges, was made. It has shown that presence of unstable forces of locomotive masses inertia during work of oscillating crank drive results in breakage of pin surfaces in joint of piston-rod with a crank, and in subsequent change of working surfaces of this kinematics pair, followed by hitting of the masses of movable links and in generation of considerable dynamic load, providing the reason of breakages of details of executive mechanism and the source of resilient vibration (vibrations) and harmful acoustic vibration generation. With the purpose of removal of influence of clearances in hinges on the origin of additional dynamic forces it is necessary to reveal regularities of impulse loads appearance. Regularities of such loads appearance in crank-type mechanisms with clearances in joints of kinematics pairs, caused by contact fault as a result of change in working surfaces contact, can be determined by kinetic static analysis. Analysis of work of crank-type hinge with clearance of oscillating crank drive of jaw crusher was conducted. Based on the analysis results it was determined, that contact fault in joint of crank-piston-rod kinema tics pair elements is conditioned by change of sign of reaction force. Clearance overtravel in a crank-type hinge takes place when both links are on one line. Determination of mechanism links positions, at which there is interconnection of crank-type hinge contact surfaces, allows to use mechanisms rationally for selection of clearances with resilient elements that during all work cycle of oscillating crank drive choose clearance in crank-type joint and prevent additional dynamic load occurrence. That promotes reliability of jaw crusher operation in whole.

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Marghitu, Dan B., and Edmon Perkins. "Dynamics of a Linkage Mechanism Using Sample Entropy." Applied Mechanics and Materials 896 (February 2020): 67–74. http://dx.doi.org/10.4028/www.scientific.net/amm.896.67.

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The dynamics of a slider-crank mechanism is developed using Kane's equations of motion. The motor torque is a function of the derivative of the generalized coordinate. The nonlinear equations of motion are solved using MATLAB numerical techniques. The sample entropy is calculated for different angular velocities of the crank.

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Yuan, Rui, Yu Sun, Wen Hai Fan, Kai Wu, and Zheng Jun Chen. "Research on Balancing Method for Inertia Force of Slider-Crank Mechanism with Small Linkage Ratio." Advanced Materials Research 591-593 (November 2012): 2011–15. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.2011.

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In view of the difficult balance of inertia force for the slider-crank mechanism, on the basis of analyzing inertia force of the slider-crank mechanism, a new balancing method of inertia force was proposed for the slider-crank mechanism with small linkage ratio, the rotary mass and the moving mass had replaced the mechanism mass, the inertia force of rotary mass was balanced by rotary weight counterbalance, a spring was disposed by slider, it provided variable elastic force and balanced the inertia force of moving mass. Then the balancing method was analyzed deeply and the theoretical derivation was made, the results show that this balancing method would achieved approximately balance for inertia force of the slider-crank mechanism with small linkage ratio.

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40

Harada, Takashi, Naomichi Tanaka, and Takayuki Fujitsuka. "Design of an Arc-Core Moving Mechanism for Injection Molding Using a Link and Cam Mechanism." International Journal of Automation Technology 15, no. 3 (May 5, 2021): 366–74. http://dx.doi.org/10.20965/ijat.2021.p0366.

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A novel plastic injection mold design for a product with a deep arc-hole based on the kinematic analysis is proposed. To move the wide angle arc-core, a hybrid mechanism combining a slider-crank and a swing cam is designed. The force transmission coefficient of the slider-crank and the pressure angle of the swing cam are used to evaluate the dimensions of the mechanism. The motion of the designed mechanism was confirmed by using a prototype made with a 3D printer.

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Wang, Hui, Rong Rong Zhang, Sheng Liang Xiao, and Peter Leisner. "Analysis of Kinematics and Dynamics of Crank-Rocker Mechanism." Advanced Materials Research 945-949 (June 2014): 690–95. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.690.

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Graphic method and analytical method are often used for calculation analysis of kinematics and dynamics of the crank-rocker mechanism. However, the analysis procedure is usually complicated and the analysis results can not be expressed visually and directly. Programs are made on the basis of theoretical analysis of kinematics and dynamics in this paper, and a kind of analyzing system of crank-rocker mechanism is designed with Java. This system may analyze the crank-rocker mechanism’s motion state, stress condition and its change regulation in different operating conditions, as well as different rotation angles of the crank. This system has also a friendly man-machine interface. Calculation results are expressed through textbox and parametric curve. Each window of the system has the following buttons: calculation button, save button, output curve button, print button, maximum/minimum value output button and exit button. This system may evidently reduce the calculation workload and improve working efficiency.

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42

Sereda, N. A. "MATHEMATICAL MODEL AND AREA OF EXISTENCE OF THE FAMILY CRANKS AND MOBILE MECHANISMS WITH THE MAXIMUM TRANSMISSION ANGLE." Spravochnik. Inzhenernyi zhurnal, no. 285 (December 2020): 20–26. http://dx.doi.org/10.14489/hb.2020.12.pp.020-026.

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The article examines crank-rocker mechanisms. Such mechanisms are used in transport and technological machines. The article is devoted to the search for a new family of crank-rocker mechanisms. A mathematical model of a new family of crank-rocker mechanisms is obtained. In this family, the maximum transmission angle reaches 90 when the crank angle is 75. Thus, the new family of crank-rocker mechanisms differs from the known families by the position of the mechanism in which the maximum of the transmission angle function takes place. It is shown that, with a certain ratio of link lengths, the new family corresponds to the known families KKM-5 and KKM-7. The area of existence of a new family of crank-rocker mechanisms is established. This area is bounded by the arc of the circle of the unit radius and the curve. The mentioned curve is based on a joint solution of a mathematical model of a new family of mechanisms and the famous Kolchin straight line. The dependence for the minimum transmission angle is obtained. A formula for determining the angle of the rocker arm span is proposed. A graphical interpretation of the mentioned dependencies and formulas is constructed. The scope of existence of a new family of crank-rocker mechanisms and graphical interpretations are used in determining the geometric parameters of mechanisms. These mechanisms are part of a new family of mechanisms.

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43

Qin, Zhe, Xiao-Chu Liu, and Zhuan Zhao. "Delta Parallel Robot Based on Crank-Slider Mechanism." IAES International Journal of Robotics and Automation (IJRA) 6, no. 2 (June 1, 2017): 112. http://dx.doi.org/10.11591/ijra.v6i2.pp112-120.

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A three-degree-of-freedom Delta parallel manipulator driven by a crank-slider mechanism is proposed. In Cartesian space, a gate-shaped curve is taken as the path of the pick-and-place operation, combining with the inverse kinematics theory of the Delta robot, and a mathematical model of robot statia force transmission is established. The force and the output torque of the robot-driven joint are taken as the main performance indexes, and the value of the crank-slider mechanism applied to Delta robot is further measured. The simulation results show that the delta robot driven by the crank slider mechanism can reduce the force and output torque of the driving joint during the picking and discharging operation, and has good practical application value.

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44

Grabovsky, A. A. "Kinematics of Crank Gear with Two Crankshafts." Izvestiya MGTU MAMI 3, no. 2 (January 20, 2009): 56–63. http://dx.doi.org/10.17816/2074-0530-69561.

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45

Mohammed, S. E., M. B. Baharom, and A. Rashid A. Aziz. "Estimation of Counterweight for Shaking Force Balancing of a Crank-Rocker Mechanism." Applied Mechanics and Materials 663 (October 2014): 135–40. http://dx.doi.org/10.4028/www.scientific.net/amm.663.135.

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This paper proposes a method of balancing the shaking force of a crank-rocker mechanism which rotates at a constant angular speed with zero-unbalanced angle. In this approach, the kinematic synthesis and dynamic behavior of the mechanism are combined. The method is realized by modeling the mass of the connecting rod to represent two concentrated masses placed at the crank and rocker pins. The shaking forces balancing are done by adding counterweight masses to the crank and the rocker. The verification and numerical computation of the proposed balancing technique were carried out using ADAMS Software. The results showed that the sum of all the resultant forces was completely eliminated for the newly-balanced crank rocker mechanism.

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46

Kao, Chih Cheng. "Optimal Design and Control of a Slider-Crank Mechanism System." Advanced Materials Research 487 (March 2012): 608–12. http://dx.doi.org/10.4028/www.scientific.net/amr.487.608.

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This paper mainly proposes an efficient modified particle swarm optimization (MPSO) method, to identify a slider-crank mechanism driven by a field-oriented PM synchronous motor. The parameters of many industrial machines are difficult to obtain if these machines cannot be taken apart. In system identification, we adopt the MPSO method to find parameters of the slider-crank mechanism. This new algorithm is added with “distance” term in the traditional PSO’s fitness function to avoid converging to a local optimum. Finally, the comparisons of numerical simulations and experimental results prove that the MPSO identification method for the slider-crank mechanism is feasible.

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Xie, Jun Hui, and Jian Chang Yuan. "Vibration Analysis of Needle-Punching Machine Slider-Crank Mechanism." Applied Mechanics and Materials 215-216 (November 2012): 730–34. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.730.

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After analysis of the movement characteristics of needle-punching machine slider-crank mechanism in theory, a slider-crank mechanism acceleration curve had been rendered by MATLAB software and acceleration movement curve had been drawn after the measurement of acceleration of slider-crank mechanism by ADAMS simulation software. Through the comparison between the two results, a conclusion had been drawn. Finally, 3 advice of minishing vibration had been given according to the conclusion of calculation of acceleration by Quality Substitution Method,the first advice is the quality and site of the balance block are chose appropriately,the second advice is the weight of the slider and the connecting rod need to be reduced by choosing appropriate material.

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Lu, D. M. "A Triangular Nomogram for Spherical Symmetric Coupler Curves and its Application to Mechanism Design." Journal of Mechanical Design 121, no. 2 (June 1, 1999): 323–26. http://dx.doi.org/10.1115/1.2829463.

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This paper presents a triangular nomogram for spherical symmetric coupler curves generated by a spherical crank-rocker with special dimensions. The paper also illustrates the application of this nomogram for spherical mechanism design. The expression of symmetric coupler curves traced by the spherical crank-rocker is derived. A computer program is developed to calculate the coordinates of the coupler curve points for the prescribed dimensions of the mechanism. According to the classified properties of coupler curves obtained, a triangular nomogram for spherical symmetric coupler curves can then be constructed by using three design parameters, i.e., length of crank, length of fixed link, and coupler angle. The triangular nomogram provides an alternative selection for dimensional synthesis of spherical path generators. The synthesized mechanisms can also be used to provide initial estimates for optimal synthesis of spherical path generators. A design example is presented.

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Cao, Ju Jiang, Yu Qi Wang, and Ji Wei Sun. "Basic Research of Crank-Group Driving Mechanism." Advanced Materials Research 538-541 (June 2012): 701–4. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.701.

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This paper put forward a kind of crank-group driving mechanism on the basis of parallelogram mechanism , introduced its concept, design process, and analyzed the feasibility of its movement. It can drive multiple parallel-axis synchronously, and it is a new way of transmission.

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Cao, Ju Jiang, and Yu Qi Wang. "Feasibility Research of Crank-Group Driving Mechanism." Applied Mechanics and Materials 215-216 (November 2012): 959–63. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.959.

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This paper illustrated the characteristics of parallelogram linkage，introduced the origin of the crank-group driving mechanism and its design principles, analyzed some problems of virtual constraints，and verified the feasibility of this mechanism.

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