With the advantages of high torque and low noise, traction drive continuously variable transmissions (TDCVTs) have a promising application in future vehicles. However, their efficiency is limited by spin losses caused by the different speed distributions between the contact areas of the traction. To overcome this shortcoming, this paper proposes a novel zero-spin design methodology applicable to any type of TDCVTs. The methodology analyzes the features of TDCVTs in terms of the variation of contact position and the shifting motion of traction components. It also establishes a mathematical model resulting in differential equations, whose general solution is the substitute for the equation of traction components generatrix. After applications of the methodology to two original TDCVTs, two zero-spin TDCVTs are proposed. A computational method of spin ratios, which are in direct proportion to spin losses, of four TDCVTs is introduced. The results of comparisons demonstrate that the proposed methodology can dramatically reduce the spin losses.
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March 2018
Research-Article
A Zero-Spin Design Methodology for Transmission Components Generatrix in Traction Drive Continuously Variable Transmissions
Qingtao Li,
Qingtao Li
School of Mechanical Engineering,
Xihua University,
Chengdu 610039, Sichuan, China
e-mail: tsingtau.lee@gmail.com
Xihua University,
Chengdu 610039, Sichuan, China
e-mail: tsingtau.lee@gmail.com
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Min Liao,
Min Liao
School of Mechanical Engineering,
Xihua University,
Chengdu 610039, Sichuan, China
e-mail: liaominxhu@163.com
Xihua University,
No. 999 Jinzhou Road
,Chengdu 610039, Sichuan, China
e-mail: liaominxhu@163.com
Search for other works by this author on:
Shuang Wang
Shuang Wang
School of Mechanical Engineering,
Xihua University,
Chengdu 610039, Sichuan, China
e-mail: wsh@mail.xhu.edu.cn
Xihua University,
No. 999 Jinzhou Road
,Chengdu 610039, Sichuan, China
e-mail: wsh@mail.xhu.edu.cn
Search for other works by this author on:
Qingtao Li
School of Mechanical Engineering,
Xihua University,
Chengdu 610039, Sichuan, China
e-mail: tsingtau.lee@gmail.com
Xihua University,
Chengdu 610039, Sichuan, China
e-mail: tsingtau.lee@gmail.com
Min Liao
School of Mechanical Engineering,
Xihua University,
Chengdu 610039, Sichuan, China
e-mail: liaominxhu@163.com
Xihua University,
No. 999 Jinzhou Road
,Chengdu 610039, Sichuan, China
e-mail: liaominxhu@163.com
Shuang Wang
School of Mechanical Engineering,
Xihua University,
Chengdu 610039, Sichuan, China
e-mail: wsh@mail.xhu.edu.cn
Xihua University,
No. 999 Jinzhou Road
,Chengdu 610039, Sichuan, China
e-mail: wsh@mail.xhu.edu.cn
1Corresponding author.
Contributed by the Power Transmission and Gearing Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received August 8, 2017; final manuscript received November 23, 2017; published online December 15, 2017. Assoc. Editor: Massimo Callegari.
J. Mech. Des. Mar 2018, 140(3): 033301 (9 pages)
Published Online: December 15, 2017
Article history
Received:
August 8, 2017
Revised:
November 23, 2017
Citation
Li, Q., Liao, M., and Wang, S. (December 15, 2017). "A Zero-Spin Design Methodology for Transmission Components Generatrix in Traction Drive Continuously Variable Transmissions." ASME. J. Mech. Des. March 2018; 140(3): 033301. https://doi.org/10.1115/1.4038646
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