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Journal articles on the topic 'Gear transmissions'

Author: Grafiati

Published: 16 November 2024

Last updated: 13 June 2025

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1

Litvin, F. L., J. C. Wang, R. B. Bossler, Y. J. D. Chen, G. Heath, and D. G. Lewicki. "Application of Face-Gear Drives in Helicopter Transmissions." Journal of Mechanical Design 116, no. 3 (1994): 672–76. http://dx.doi.org/10.1115/1.2919434.

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The use of face-gears in helicopter transmissions was explored. A light-weight, split torque transmission design utilizing face-gears was described. Face-gear design is discussed. Topics included basic design geometry, tooth generation, limiting inner and outer radii, and recommendation for the gear ratio. Face-gear experimental studies were also included and the feasibility of face-gears in high-speed, high-load applications such as helicopter transmissions was demonstrated. Torque-split tests were performed and demonstrated an accurate split of torque using the face-gear concept.

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2

Amir Mustafayev, Amir Mustafayev, and Chingiz Nasirov Chingiz Nasirov. "MATHEMATICAL EXPRESSIONS FOR TEMPERATURE IN THE CONTACT ZONE OF TEETH OF THE GEAR MECHANISMS." ETM - Equipment, Technologies, Materials 14, no. 02 (2023): 126–34. http://dx.doi.org/10.36962/etm14022023-126.

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Transmission gears are very widely used in modern machine building. Despite that electrical transmissions used in machine building industry, mainly mechanical transmissions are widely used in the industry. Because mechanical transmissions are independent and better than other transmisions. Distributing power between the transmission mechanisms and working units of various machines, changing the angle of momentum, by adjusting the speed of the parts, it is possible to change the type of movement, turn on and off the mechanism, change the direction of the transmission mechanisms. One of the most

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3

Salamandra, Konstantin. "Static analysis and parameters synthesis of planetary-layshaft transmissions with three power flows." MATEC Web of Conferences 224 (2018): 02040. http://dx.doi.org/10.1051/matecconf/201822402040.

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The increase in the number of transmission ratios in the vehicles gearboxes leads to an increase in the number of mechanisms used and their complication. One way to obtain simple designs of multi-speed transmissions with smaller number of gears, clutches, brakes and synchronizers is to use combinations of planetary differential gears and gears with fixed axes (planetary-layshaft transmissions). The article presents a static analysis of a planetary-layshaft transmissions with three parallel power flows for obtaining the dependencies between the gear ratios of the internal mechanisms and the spe

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4

Mustafayev, Amir G., and Chingiz R. Nasirov. "A study of factors affecting wear and destruction of teeth in gear mechanisms." Nafta-Gaz 79, no. 9 (2023): 604–10. http://dx.doi.org/10.18668/ng.2023.09.06.

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Transmission gears are very widely used in the modern construction of the machine. Even though electrical transmissions are used, mainly mechanical transmissions are widely used in the machine building industry as they are independent and better than other transmissions. Distributing power between the transmission mechanisms and working units of various machines, by changing the angle of momentum by adjusting the speed of the parts, it is possible to change the type of movement, turn the mechanism on and off, and change the direction of the transmission mechanisms. One of the most widespread t

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5

Radzevich, Stephen P. "A Way to Improve the Accuracy of Hobbed Involute Gears." Journal of Mechanical Design 129, no. 10 (2006): 1076–85. http://dx.doi.org/10.1115/1.2761919.

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Involute gears are widely used in the design of machines and mechanisms. Performance of gear transmissions, e.g., performance of automobile transmissions, strongly depends upon the accuracy of gears of which the transmission is comprised. The higher the gear accuracy, the higher performance of the gear transmission observed. An increase of accuracy of involute gears reduces vibration of the transmission, and causes lower noise excitation. A significant amount of gears for the needs of the automotive industry is manufactured by hobbing. Reported in this paper is a way to improve the accuracy of

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6

Maláková, Silvia, Matej Urbanský, Gabriel Fedorko, Vieroslav Molnár, and Samuel Sivak. "Design of Geometrical Parameters and Kinematical Characteristics of a Non-circular Gear Transmission for Given Parameters." Applied Sciences 11, no. 3 (2021): 1000. http://dx.doi.org/10.3390/app11031000.

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In this paper, the authors present the design of a suitable gear transmission with the continuously changing gear ratio in the range from 0.5 through 1.0 to 2.0 and back during one revolution of intermeshing gears, according to demands specified for a practical application. The gear train was designed as a pair of identical elliptical gears and the design procedure of the suitable pitch curve (ellipse) is described. The center of rotation of each of the gears is coincident with one of the pitch ellipse foci, so the gears are placed eccentrically. The gear teeth have involute profiles, but the

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7

Brancati, Renato, Stefano Pagano, and Ernesto Rocca. "Dynamic Behaviour of an Automotive Dual Clutch Transmission during Gear Shift Maneuvers." Applied Sciences 13, no. 8 (2023): 4828. http://dx.doi.org/10.3390/app13084828.

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The paper presents a model for the torsional dynamics of an automotive driveline equipped with a Dual Clutch Transmission (DCT), focusing on the gear rattle phenomenon arising during the transients of engagement and disengagement of the clutches, and during the synchronizing manoeuvres. This vibro-acoustic phenomenon, particularly annoying in automotive transmissions, can be accentuated by the presence of many unloaded gears in this type of gearbox. Dual Clutch Transmission systems are today largely diffused in the car automatic transmissions, permitting fast gear shifts and avoiding the inter

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8

Wu, Yi-Chang, and Che-Wei Chang. "DEVELOPMENT OF 3-SPEED REAR HUB BICYCLE TRANSMISSIONS WITH GEAR-SHIFTING MECHANISMS." Transactions of the Canadian Society for Mechanical Engineering 39, no. 3 (2015): 407–18. http://dx.doi.org/10.1139/tcsme-2015-0030.

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Rear hub bicycle transmissions require less maintenance and are more reliable than rear derailleurs. This study proposes a systematic design process for the conceptual design of 3-speed rear hub bicycle transmissions. By analyzing the kinematics of a basic epicyclic gear mechanism using the fundamental circuit method, the gear sequence and clutching sequence arrangements for 3-speed rear hub transmissions can be obtained. The numbers of gear-teeth for all gear elements resulting in a minimum installation space and satisfying the required speed ratio at each gear stage are determined. A gear-sh

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9

Handschuh, R. F., D. G. Lewicki, and R. B. Bossler. "Experimental Testing of Prototype Face Gears for Helicopter Transmissions." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 208, no. 2 (1994): 129–36. http://dx.doi.org/10.1243/pime_proc_1994_208_262_02.

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An experimental programme to test the feasibility of using face gears in a high-speed and high-power environment was conducted. Four face gear sets were tested, two sets at a time, in a closed-loop test stand at pinion rotational speeds to 19 100 r/min and to 271 kW (364 b.h.p.). The test gear sets were one-half scale of the helicopter design gear set. Testing the gears at one-eighth power, the test gear set had slightly increased bending and compressive stresses when compared to the full-scale design. The tests were performed in the NASA Lewis spiral bevel gear test facility. All four sets of

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10

Liu, Dezheng, Yan Li, Zhongren Wang, You Wang, and Yu Wang. "Modeling and Analysis of Effective Case Depth on Meshing Strength of Internal Gear Transmissions." Mathematical Problems in Engineering 2018 (December 30, 2018): 1–12. http://dx.doi.org/10.1155/2018/5153292.

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The effective case depth (ECD) plays an important role in the meshing strength of internal gear transmissions. Carburizing quenching heat treatment is commonly used to enhance gear strength and wear resistance. However, the different ECDs in internal and external gears caused by heat treatment significantly affect the meshing strength, causing vibration, reducing gear service life, and hastening malfunction in internal gear transmission. In this study, we conducted an investigation of different ECDs by the heat treatment of carburized gear pairs by numerical simulation with the finite element

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11

Hsu, C.-H., and R.-H. Huang. "Design of parallel-connected epicyclic-type automatic transmissions with two fundamental geared entities." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 222, no. 3 (2008): 371–81. http://dx.doi.org/10.1243/09544070jauto548.

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The purpose of this paper is to present a systematic methodology to simplify effectively the design of automatic transmissions by using the concepts of fundamental geared entity and basic gear ratios. An atlas of parallel-connected epicyclic-type automatic transmissions is first enumerated. Next, an effective procedure is developed to synthesize feasible clutching sequences for all the parallel-connected epicyclic gear mechanisms with two fundamental geared entities. Then, the numbers of teeth of gears in each epicyclic gear mechanism are determined by an analytical method. Finally, four alter

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12

Alendeev, E. M., and V. A. Kryuchkov. "VARIANTS OF TWO-COUPLE GEAR SHIFTING ORGANIZATION ON TRACTORS." Traktory i sel hozmashiny 84, no. 3 (2017): 10–18. http://dx.doi.org/10.17816/0321-4443-66254.

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In recent years, we can see trend of increasing tractor transport and operating speeds, which is also accompanied by increasing of gears number in manual transmissions. Increasing of gears number in Powershift transmissions is achieved by using in gearbox construction a few operating ranges. Every range and every gear of such gearboxes are switched by separate friction clutch that gives opportunity to organize gear shifting without power interruption in all tractor speed range. However, such technical solutions lead to appearing gear shifting, requiring of pressure control in four friction clu

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13

He, Chunyan, Zaigang Chen, Wanming Zhai, Jianzheng Jiang, and Kaiyun Wang. "A spatial dynamics model for heavy-haul electric locomotives considering the dynamic coupling effect of gear transmissions." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 233, no. 9 (2019): 961–73. http://dx.doi.org/10.1177/0954409718823138.

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A locomotive is usually powered by the electromagnetic torque which is transmitted from the traction motor to the wheelset by gear transmission. In order to investigate the dynamic coupling effects from the gear transmission subsystems on the entire locomotive dynamics system, a comprehensive spatial locomotive dynamics model that considers the dynamic coupling effect of the gear transmissions is developed based on the multibody dynamics theory. In this model, the moved Marker technique is employed to calculate the dynamic mesh force of the gear pairs through which more accurate time-varying g

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14

Sosnin, A. A., N. V. Buzunov, I. D. Khlobystov, and A. B. Kartashov. "Analysis of control systems for mechatronic transmission gear shift mechanisms." Trudy NAMI, no. 3 (September 24, 2023): 71–78. http://dx.doi.org/10.51187/0135-3152-2023-3-71-78.

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Introduction (problem statement and relevance). Within the study, review and analysis of possible variants for gear shift control systems architecture for vehicles with mechatronic transmissions are made to detect the respective advantages and disadvantages for each scheme and to determine the most optimum solution for application within the mentioned wheeled vehicles in terms of energy consumption and performance.The purpose of the study is to determine the most optimum control system for mechatronic transmission gear shift mechanisms of electric vehicles.Methodology and research methods. Thi

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15

Li, Xueliang, Jibin Hu, and Zengxiong Peng. "Synthesis method for compact dual-clutch transmission with four DOFs gear mechanism." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 11 (2018): 2929–38. http://dx.doi.org/10.1177/0954407018811043.

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The design of dual-clutch transmission with multi-degrees-of-freedom (DOFs) is a good solution to increase in number of gears and a wider range of gear ratio in the limited space and weight. This article proposes a novel synthesis method for scheme design of the dual-clutch transmission with four degrees-of-freedoms gear mechanism. First, the shift sequences considering the path of power flow and shift logics are analyzed based on the degrees-of-freedom model, abstracted from the degrees-of-freedom of the schemes. Second, the schemes of gear-pair and shaft, defined as the scheme that ignores t

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16

Cristescu, Ana, Bogdan Cristescu, and Laurenţia Andrei. "Designing Multispeed Gear Pitch Curves." Applied Mechanics and Materials 657 (October 2014): 480–84. http://dx.doi.org/10.4028/www.scientific.net/amm.657.480.

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As special mechanical systems within transmissions of unconventional motions, noncircular gears still offer multiple research opportunities due to their various geometries and kinematics characteristics. Investigation on noncircular gears highlights the lack of information on gears with combination of constant and variable speed, also named multispeed gears, recommended for industrial applications that require uniform speeds for different parts of a cycle, with a smooth transition between the parts. Therefore, in this paper the design of multispeed gears pitch curves is taken into account, as

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17

Bai, S., and J. Angeles. "The design of spherical multilobe-cam mechanisms." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 2 (2009): 473–82. http://dx.doi.org/10.1243/09544062jmes1154.

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Cam—roller mechanisms can be used in transmissions and robotic devices as an alternative to their bevel-gear counterparts. As bevel gears are used to couple shafts of intersecting axes, their cam-mechanism replacements are bound to have intersecting axes as well. This means that the contact surface of the cam must be conical, which leads to spherical cam mechanisms. Compared with gear transmissions, cam—roller mechanisms feature low friction, low backlash, and high strength. However, cam mechanisms may end up with a high pressure angle if negative action, a motion in which the cam is driven by

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18

Kahraman, A., H. Ligata, K. Kienzle, and D. M. Zini. "A Kinematics and Power Flow Analysis Methodology for Automatic Transmission Planetary Gear Trains." Journal of Mechanical Design 126, no. 6 (2004): 1071–81. http://dx.doi.org/10.1115/1.1814388.

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A generalized formulation for analyzing speeds and forces of the gear components of planetary automatic transmissions is proposed. The formulation is capable of analyzing any typical one-degree-of-freedom automatic transmission gear train containing any number of simple, compound or complex-compound planetary gear sets. The formulation consists of three components: a kinematic analysis formulation to compute rotational speeds of gears and carriers, a gear ratio and kinematic configuration search algorithm, and a power flow analysis formulation. The kinematics component computes rotational spee

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19

Zaman, Muhammad, Muhammad Atif, and Mudassar Naseer. "Formal Verification of Twin Clutch Gear Control." VAWKUM Transactions on Computer Sciences 10, no. 2 (2022): 24–33. http://dx.doi.org/10.21015/vtcs.v10i2.1273.

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Twin clutch model enables the power-shifts as conventional planetary automatic transmission and eradicates the disadvantages of single clutch transmission. The automatic control of the dual clutches is a synchronization problem. Particularly, to control the clutching component that engages torque when running in one direction of revolution and disengages when running in the other direction, which exchange the torque smoothly during torque phase of the gear-shifts on planetary-type automatic transmissions, seemed for quite a while hard to compensate through clutch control. Another problem is to

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20

Idelevich, A. Ya. "Measuring moving gears in multilink gear transmissions." Measurement Techniques 35, no. 8 (1992): 923–25. http://dx.doi.org/10.1007/bf00977433.

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21

Lebedev, S. Yu, and V. N. Syzrantsev. "Calculating the probability of the failure-free operation of spur gear transmissions." Diagnostics, Resource and Mechanics of materials and structures, no. 3 (June 2022): 13–24. http://dx.doi.org/10.17804/2410-9908.2022.3.013-024.

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The article presents an improved method for calculating the probability of failure-free operation of case-hardened spur gear transmissions. The existing methods for calculating the probability of failure-free operation of gear transmissions are analyzed. The failure tree for a case-hardened spur gear transmission is presented. The probability of failure-free operation of case-hardened cylindrical gear transmissions is presented as the product of the probabilities of failure-free operation of the gear and the wheel according to the following criteria (failure types): contact endurance (pitting)

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22

Rackov, Milan, Siniša Kuzmanović, Ivan Knežević, Maja Čavić, and Marko Penčić. "Analysis of Conceptual Solutions of Universal Helical Geared Reducers." International Journal of Engineering and Management Sciences 5, no. 2 (2020): 64–72. http://dx.doi.org/10.21791/ijems.2020.2.8.

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Geared reducers are mechanisms designed to reduce the number of revolutions using geared elements and nowadays they present one of the most commonly used types of mechanical transmissions in mechanical engineering. Due to the different shapes of geared elements, there are different types of geared transmissions: helical, bevel, worm, special and combined transmissions. This paper analyses only helical geared transmissions, since there is a great extent of whole this matter. Helical transmissions are analysed only with external helical gearing, since internal geared pairs represent a special an

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23

Sharipov, V. M., G. O. Kotiev, Yu S. Shchetinin, M. V. Vyaznikov, S. V. Gaev, and M. G. Rozenoer. "On the selection of parameters of double-flow hydromechanical transmission for industrial and forestry tractors." Traktory i sel hozmashiny 83, no. 3 (2016): 8–14. http://dx.doi.org/10.17816/0321-4443-66117.

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Double-flow hydromechanical transmissions are widely used in industrial and forestry tractors. The main advantage of such transmission is the higher value of the maximum efficiency coefficient in comparison with the single-flow one. The article presents a method of selection of parameters of such transmissions for industrial and forestry tractors. In this case, it considers the hydromechanical transmission with a differential unit at the input and at the output. Three-link differential devices with mixed type of gear engagement are used as the differential unit. All of the twelve possible sche

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24

Molyneux, W. G. "The internal bevel gear and its applications." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 211, no. 1 (1997): 39–61. http://dx.doi.org/10.1243/0954410971532488.

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Information on bevel gears and their applications is comprehensive where external bevel gears are concerned but proves to be more scarce when related to internal bevel gears, despite the fact that there are isolated practical examples of the use of such gears that have demonstrated their effectiveness in demanding transmission situations. In what follows a unique family of transmissions is examined, based solely on a particular layout of internal and external bevel gear combinations, that aims to demonstrate the wide ranging, largely unexploited, potential of transmission systems of this kind.

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25

Sierykov, Volodymyr. "ANALYSIS OF RESEARCH ON PLANETARY GEARBOXES OF ARMORED VEHICLES (REVIEW ARTICLE)." Bulletin of the National Technical University «KhPI» Series: Engineering and CAD, no. 2 (December 18, 2023): 57–68. http://dx.doi.org/10.20998/2079-0775.2023.2.09.

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The work is devoted to the review of modern trends in the research and use of planetary gearboxes of armored vehicles. An analysis of the areas of application of mechanical transmissions was carried out. The advantages and disadvantages of using gear gearboxes as part of mechanical transmissions are described. The design features of the use of gears in transmissions are considered. The requirements for gear gearboxes as part of transmissions are defined. The advantages and disadvantages of using planetary gearboxes and their areas of use are analyzed. The classification of mechanical adjustabl

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26

Wang, Haiwei, Cheng Ji, Fengxia Lu, Cheng Wang, and Xueyan Sun. "A Generalized Dynamic Model and Coupling Meshing Force Analysis for Planetary Gear Set Transmissions." Applied Sciences 12, no. 12 (2022): 6279. http://dx.doi.org/10.3390/app12126279.

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The dynamics analysis of a planetary gear set transmissions requires the creation of completely different models for different gears, which is very tedious. In this paper, a generalized dynamics modeling process is proposed for a three planetary gear set transmissions, and a generalized dynamic model for multiple gears is established by using the lumped mass method. The analysis of meshing force characteristics is carried out for the second gear position, and the meshing frequency coupling phenomenon between the meshing forces of the three planetary gear sets is investigated. The results show

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27

Voropay, Alexey, Olexandr Koriak, Dmytro Bogdan, and Eduard Neskreba. "Optimization of key gear parameters to reduce weight." Automobile transport, no. 52 (July 26, 2023): 32–40. http://dx.doi.org/10.30977/at.2219-8342.2023.52.0.04.

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Problem. The problems of designing, and especially improving, mechanical gears are of key importance in modern mechanical engineering and automotive transport. Gear transmissions are quite widespread relative to other mechanical transmissions because they have a number of crucial advantages. Gear transmissions are widely used in a variety of drives for vehicle components and assemblies, with modern development trends aimed at reducing their weight and size. As the size of the transmission decreases, the dimensions of other parts and assemblies also decrease, and, accordingly, their cost. There

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Hsieh, Long Chang, and Hsiu Chen Tang. "The Kinematic Design of Three-Speed Automatic Transmission for Electric Motorcycle." Applied Mechanics and Materials 284-287 (January 2013): 979–82. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.979.

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Motorcycle is invented so far more than 100 years. Because of having the advantages of light weight, cheap and fast-moving, motorcycle becomes the most popular traffic vehicle. Traditionally, the power systems of motorcycles are internal combustion engines. Recently, due to the reason of energy-saving, and carbon reduction, the engine in motorcycle is substituted by electric motor. Hence, due to the reason of pollution-free, electric motorcycle become more and more popular in city traffic. Planetary gear trains can be used as the transmission systems for electric motorcycles. The purpose of th

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Höhn, Bernd Robert. "Future Transmissions for Wind Turbines." Applied Mechanics and Materials 86 (August 2011): 18–25. http://dx.doi.org/10.4028/www.scientific.net/amm.86.18.

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Most transmissions for wind turbines are set up by multiple consecutively arranged planetary gear sets and/or normal gear sets. Therefore these transmissions have a constant ratio. In order to feed the electricity produced by the wind turbines into the grid, an electric conversion to a constant frequency of 50 Hz is necessary. FZG developed a new concept for transmissions of wind turbines based on a planetary gear. By superposition of a small electric engine the transmission ratio is continuously variable. This makes an electric conversion unnecessary and thereby increases the efficiency of th

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30

Dong, Peng, Yongfei Wang, Shengdun Zhao, et al. "Design and experimental study of novel multi-stage gearbox." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 235, no. 1 (2020): 105–13. http://dx.doi.org/10.1177/0954407020945823.

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Automatic transmission has been widely used in the automotive industry, and novel automatic transmissions with simple structure and reliable operation are a research hotspot. This paper proposes an automatic transmission with multi-stage gears to simplify its working process. The automatic transmission comprises a case and a driving transmission shaft and driven shaft which are mounted on the case. The transmission gear pairs are superimposed on the driving and driven shafts similar to a tower. The gear pairs on the driving and driven shafts are always engaged. All the driving gears are connec

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31

Abadjiev, Valentin, and Emilia Abadjieva. "One Approach to the Synthesis, Design and Manufacture of Hyperboloid Gear Sets With Face Mating Gears. Part 1: Basic Theoretical and Cad Experience." Journal of Theoretical and Applied Mechanics 46, no. 2 (2016): 3–26. http://dx.doi.org/10.1515/jtam-2016-0007.

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Abstract Hyperboloid gear drives with face mating gears are used to transform rotations between shafts with non-parallel and non-intersecting axes. A special case of these transmissions are Spiroid and Helicon gear drives. The classical gear drives of this type are the Archimedean ones. The objective of this study are hyperboloid gear drives with face meshing, when the pinion possesses threads of conic convolute, Archimedean and involute types, or the pinion has threads of cylindrical convolute, Archimedean and involute types. For simplicity, all three types transmis- sions with face mating ge

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Abadjiev, Valentin, and Emilia Abadjieva. "Hyperboloid gear transmissions: innovations, experimental and manufacture realization." MATEC Web of Conferences 287 (2019): 04003. http://dx.doi.org/10.1051/matecconf/201928704003.

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This work is a review of researches carried out by the authors on prototyping processes and testing of hyperboloid gears. These activities are preceded by modeling for synthesis and design of these gear sets. It contains also a description of the innovative and inventive activities of the authors over the years. The twenty-five years period of studying hyperboloid gear mechanisms with an exact linear contact between the active tooth surfaces is entirely subordinated to the transfer of the obtained scientific results into scientifically applied and applied ones, in order to create adequate inno

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33

BOSTAN, ION, VALERIU DULGHERU, and VIOREL BOSTAN. ""Analytic description of teeth profile of gears with rollers ab and justification of precessional gear parameters selection a"." Journal of Engineering Sciences and Innovation 5, no. 1 (2020): 1–8. http://dx.doi.org/10.56958/jesi.2020.5.1.1.

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The engineering complex study of the triad “gear-technology-transmission” has permitted to elaborate a new type of mechanical transmission – planetary precessional transmissions with multicouple gear. In this paper, the authors present the mathematic model of the multicouple gear. A computer program for doing this it is also elaborated. It is shown the calculus modalities and some teeth profile diagrams.

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Abadjiev, Valentin, and Emilia Abadjieva. "One Approach to the Synthesis, Design and Manufacture of Hyperboloid Gear Sets with Face Mating Gears. Part 2: Review of Practical Realization." Journal of Theoretical and Applied Mechanics 46, no. 3 (2016): 3–16. http://dx.doi.org/10.1515/jtam-2016-0013.

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Abstract Hyperboloid gear drives with face mating gears are used to transform rotations between shafts with non-parallel and non-intersecting axes. A special case of these transmissions are Spiroid1 and Helicon gear drives. The classical gear drives of this type are Archimedean ones. The objective of this study are hyperboloid gear drives with face meshing, when the pinion has threads of conic convolute, Archimedean and involute types, or the pinion has threads of cylindrical convolute, Archimedean and involute types. For simplicity, all three type transmissions with face mating gears and a co

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35

Protasov, Roman, Ľuboš Magdolen, Jan Danko, Olena Lanets, and Borys Vorontsov. "ANALYSIS OF THE INFLUENCE OF THE DISPLACEMENT OF THE GEAR RACK PROFILE OF THE PAIR EVOLUTION GEARING ON THE QUALITY INDICATORS OF THE TRANSMISSION." Ukrainian Journal of Mechanical Engineering and Materials Science 9, no. 2 (2023): 66–74. http://dx.doi.org/10.23939/ujmems2023.02.066.

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The article is devoted to the study of the influence of the modification of the paired evolute gearing with convex-concave contact on the quality indicators of transmission, namely, the contact pressure and the speed of slippage in the engagement. Previous studies of evolute gears showed the presence of characteristic zones on the side surface of the tooth, which have worse values of quality indicators than in similar involute gear. One of the ways to remove these zones or to reduce their impact on the load capacity of the transmission is to modify the tooth profile, which will be implemented

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Hsu, C.-H., and J.-J. Hsu. "Epicyclic gear trains for automotive automatic transmissions." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 214, no. 5 (2000): 523–32. http://dx.doi.org/10.1243/0954407001527817.

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Epicyclic gear trains, which contain at least four coaxial links, are widely used in automatic transmissions. This paper presents a systematic methodology for the synthesis of epicyclic gear trains for automotive automatic transmissions. The graph representation of epicyclic gear trains is applied to develop an approach for the structural synthesis of the graphs of admissible epicyclic gear trains. Next, for each admissible graph the adjacency matrix of an epicyclic gear train is defined to develop an algorithm for the configuration synthesis of epicyclic gear trains. Using the proposed algori

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Gong, Fei, Rupeng Zhu, Pingjun Li, and Guanghu Jin. "Analysis of Load-Sharing and Contact Characteristics of the Concentric Face Gear Split-Torque Transmission System with Elastic Supports." Applied Sciences 12, no. 10 (2022): 4894. http://dx.doi.org/10.3390/app12104894.

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The concentric face gear split-torque transmission system (CFGSTTS) is a new form of drive that is primarily used in helicopter transmission systems. Its load-sharing performance among different branches and tooth contact characteristics have a great impact on the service life of helicopter transmissions. It contains ten meshing pairs, the load distribution is complicated, and the tooth contact areas are difficult to determine. Therefore, based on the multi-point constraint method and nonconforming grid, a quasi-static analysis model of the CFGSTTS coupled with flexible supports was establishe

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Liu, Yanfang, Junbin Lai, Peng Dong, and Xiangyang Xu. "Dynamic Analysis of Helical Planetary Gear Sets under Combined Force and Moment Loading." Shock and Vibration 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/4635204.

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The dynamic behavior of a single-stage planetary gear set with helical gears of multishaft automotive automatic transmissions has been studied, in which one component of the planetary gear set is imposed by additional external vertical and axial loading from countershaft gear pair in addition to the moment. Under these combined loading conditions, the contributions of the deflections of the ring gear and the carrier cannot be neglected. A three-dimensional nonlinear time-variant dynamic model considering not only the transverse, torsional, axial, and rotational motions of the gears but also th

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Vinogradov, B. V., D. O. Fedin, V. I. Samusia, and D. L. Kolosov. "Dynamic loads in self-aligning gear transmissions of heavy loaded machines." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 1 (2021): 84–90. http://dx.doi.org/10.33271/nvngu/2021-1/084.

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Purpose. Development of a mathematical model of a heavy loaded gear transmission with a self-aligning drive gear; evaluation of the dynamic load on the gear transmission in the gear alignment process. Methodology. The calculation schematic and equations of the relative motion of the self-aligning drive gear are formed using the methods of rigid body dynamics. Analytical expressions for the gear self-alignment time, collision velocity during the alignment and dynamic load factor are obtained by integrating an ordinary differential equation. Methods of the linear theory for oscillations are used

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Abdi Nugraha, I. M. Tata, I. W. Arta Wijaya, and I. N. Budiastra. "ANALISIS PERBANDINGAN DAYA OUTPUT LISTRIK ANTARA PENGGUNAAN TRANSMISI GEAR DAN PULLEY PADA PROTOTYPE (PLTPH) MENGGUNAKAN TURBIN TURGO." Jurnal SPEKTRUM 10, no. 4 (2023): 1. http://dx.doi.org/10.24843/spektrum.2023.v10.i04.p1.

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Picohydro Power Plant is one of the environmentally friendly generators that can meet the electricity needs in the vicinity, one of which is in the Kanto Lampo Waterfall Tourism area. The planning of this PLTPH prototype is carried out to meet the lighting needs in the waterfall area. This PLTPH prototype plan uses a turgo turbine and there are two transmissions that can be used, namely, gear and pulley. This study will make a comparison between gear and pulley transmissions with the direct measurement method on the prototype and aims to determine the transmission that can get the best results

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Baek, Seung-Min, Seung-Yun Baek, Hyeon-Ho Jeon, et al. "Improvement of Gear Durability for an 86 kW Class Agricultural Tractor Transmission by Material Selection." Agriculture 12, no. 2 (2022): 123. http://dx.doi.org/10.3390/agriculture12020123.

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This study was conducted to ensure gear durability and design optimal transmission of agricultural tractors. A field test was conducted using an 86 kW agricultural tractor for plow and rotary tillage, which are typical agricultural operations. The field test was completed after about 107 h due to transmission noise and operational problems. As a result of disassembling the transmission, it was found that the range shift A and B gears were damaged. In the case of the range shift A gear, it was judged that plastic deformation occurred due to low contact stress, and the bending stress was low, th

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Siddiqui, Maimuna. "MODELLING AND 3D-PRINTING OF BEVEL GEAR." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 05 (2024): 1–5. http://dx.doi.org/10.55041/ijsrem33290.

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Bevel gear have teeth cut on conical blanks. The gear pair is used to connect non-parallel intersecting shafts for motor transmissions, differential drives and mechanical instruments. Bevel gears are used for transmission of power between axles in rear wheel of vehicle will be modelled by using solid works. Shaping, Casting and Grinding are the traditional methods of manufacturing of bevel gear which are time consuming, and increased in production cost. To overcome this, new method such as rapid prototyping method of manufacturing is used which offers the potential for faster and more cost-eff

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Vinogradov, V. M., and A. A. Cherepakhin. "Parametric optimization of gear cutting operations." Izvestiya MGTU MAMI 7, no. 1-2 (2013): 22–30. http://dx.doi.org/10.17816/2074-0530-67979.

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Matters of parametric optimization of manufacturing processes of medium pitch gears for transmissions, vehicle engines and drives of machine tools are illustrated in the paper. The mathematical model of gear cutting operation and the algorithm of parametric optimization of the machining process of a ring gear are developed by the authors. There are presented the ways of improving of manufacturing methods for gear cutting process.

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Zeng, Qing Dun, and Feng Zhe Tan. "Finite Element Analysis of Gear Contact on Two-Speed Transmission in Electric Cars." Applied Mechanics and Materials 341-342 (July 2013): 443–46. http://dx.doi.org/10.4028/www.scientific.net/amm.341-342.443.

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The main content of gear design is the strength design, and the contact strength design of gears is the main heart of the strength design, because the stress and deformation of gears directly affect their safety and service life and concern whether vehicle transmissions work smoothly. Therefore it is necessary to perform a finite element analysis for the gear contact in transmission. Based on the contact characteristic of helical gears, a three-dimensional solid model was established by using the software Pro/E, and the contact stress analysis of gears was carried out by the software ANSYS Wor

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Liu, Shiqi. "Common transmission theory and wide application." Theoretical and Natural Science 30, no. 1 (2024): 165–71. http://dx.doi.org/10.54254/2753-8818/30/20241095.

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Gear and belts/chains are the most common solution for modern mechanical devices. The allowable stress and gear ratio are two of the main factors that decide the performance of the ear section for transmission. The allowable stress can be calculated by bending stress and contact stress from design criteria. The performance of the belt solution is decided by the belt/chain material, center distance and the belt length. The allowable strength of the belt/chain solution is strongly related to the materials selected. With the current study of belts and gears, the related factors could be calculate

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Sharipov, V. M., Yu S. Shchetinin, and M. I. Dmitriev. "Kinematic analysis of double-flow hydromechanical transmissions." Traktory i sel hozmashiny 83, no. 12 (2016): 10–15. http://dx.doi.org/10.17816/0321-4443-66243.

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Double-flow hydromechanical transmissions become more and more widely used in designs of modern tractors and automobiles. Double-flow hydromechanical transmission includes a torque converter or a complex hydrodynamic transmission and a differential unit made in form of three-link differential device. The article discusses all of the 12 possible schemes of double-flow hydromechanical transmissions with a differential unit at the input and at the output with mixed type of gear engagement, and also presents the results of their kinematic analysis. For all of the 12 possible schemes, the expressio

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Knežević, Rade, Branko Đedović, and Marko Paić. "On stochastic processes in the dynamics of planetary transmissions." Tehnika 78, no. 2 (2023): 177–83. http://dx.doi.org/10.5937/tehnika2302177k.

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In addition to the theoretical analysis of the nonlinear dynamics of dissipative mechanical systems with the possibility of stochastic and chaotic processes, the paper also includes a numerical experimental example of a planetary transmission. The most common non-linear effects of operation and their influence on the behavior of the planetary gear as a system were analyzed. A simplified model of planetary gears as dissipative dynamic systems whose operation is a complex dynamic process with different effects was considered. These operating effects can appear in many different ways and can be t

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Davies, D. P., and B. C. Gittos. "Gear Steels for Future Helicopter Transmissions." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 203, no. 2 (1989): 113–21. http://dx.doi.org/10.1243/pime_proc_1989_203_062_01.

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In order to reduce weight, improve reliability and increase safety, significant changes in the design of future helicopter transmissions are envisaged. Such designs are likely to place new demands on conventional steels which will eventually result in the capability of the gear steels themselves to become the limiting factor, restricting any further opportunities for transmission design and development.

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Li, Zhibin, Sanmin Wang, Fei Li, Qi'an Peng, and Jianfeng Li. "Research on matching conditions of coaxial six-branch split-torsion herringbone gear transmission system." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 39, no. 2 (2021): 341–49. http://dx.doi.org/10.1051/jnwpu/20213920341.

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Compared with traditional gear transmission, the multi-branch split-torsion gear transmission system has the advantages of large transmission power, small size and high reliability, so it is more and more used in high-speed heavy load occasions such as ships and aircraft. Since the transmission system of multi-branch split torsional gears belongs to over-constrained configuration, it is necessary to meet strict tooth matching condition in the design process in order to realize the correct synchronous meshing of each branch, which is of great significance to ensure its uniform installation and

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Sharipov, V. M., Yu S. Shchetinin, S. V. Gaev, and O. V. Troshkin. "POWER ANALYSIS OF DUAL-FLOW HYDROMECHANICAL GEARS." Traktory i sel hozmashiny 84, no. 2 (2017): 35–41. http://dx.doi.org/10.17816/0321-4443-66273.

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Dual-flow hydromechanical transmissions are becoming increasingly widespread in the designs of modern land transport and traction machines (tractors, automobiles and high-speed crawler vehicles). This happens mainly due to the desire to increase the efficiency of transmission, although the capabilities of dual-flow hydromechanical transmissions are broader. In order to select a dual-flow hydromechanical transmission scheme in relation to specific operating conditions, it is necessary to know the advantages and disadvantages of various schemes, their potential capabilities. The evaluation of th

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