Research on a novel configuration synthesis method of no-spin traction continuously variable transmission

Li, Chao; Yao, Jin; Li, Hua; Fu, Lin

doi:10.1016/j.mechmachtheory.2020.103963

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…Step 4: For RC-CVT, the speed changing motion of conical disks is rotation around point O, which can be realized by lots of mechanisms actually. In this paper, a simple shifting mechanism [24] is used, where the shifting gears can be driven by a couple of synchronous motors.…”

Section: Figure 4 the Design Flowchart Of Rc-cvtmentioning

confidence: 99%

Design Principles and Traction Performance of a Novel Zero-spin Rolling Conical Traction Continuously Variable Transmission

Cao

2020

Preprint

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In the existing traction continuously variable transmission (CVT), half toroidal CVT (HT-CVT) is considered to have a better traction performance. However, the HT-CVT has the spin losses due to its structural limitations, which significantly influences the traction efficiency. In this paper, the kinematic qualities and contact models of a novel zero-spin rolling conical CVT (RC-CVT) are studied, and then the rollers and conical disks are compactly designed through the proposed design principles. Subsequently, the transmission efficiency is investigated by using a detailed numerical model and compared with HT-CVT. Based on these computational models and parameters, the practical spin ratio, spin momentum and traction efficiency of RC-CVT are calculated and compared with HT-CVT. The results show that the practical spin ratio and spin momentum of RC-CVT are much smaller than that of HT-CVT, and the efficiency on fixed transmission ratio is consequently higher than that of HT-CVT.

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Section: Figure 4 the Design Flowchart Of Rc-cvtmentioning

confidence: 99%

Design Principles and Traction Performance of a Novel Zero-spin Rolling Conical Traction Continuously Variable Transmission

Cao

2020

Preprint

Self Cite

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“…NS CVT was compared with half-toroidal CVT and it was observed that NS CVT has better efficiency but a lower torque. Chao et al [19] developed a new configuration synthesis method called the configuration factor table method (CFT Method). Application of the CFT method to logarithmic CVT and conical CVT resulted in fourteen variants of logarithmic CVT and ten variants of conical CVT.…”

Section: Introductionmentioning

confidence: 99%

“…All the CVTs mentioned above [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] have one major problem. They require an additional gear set and clutches for direction reversal and neutral gear ratio.…”

Section: Introductionmentioning

confidence: 99%

A Novel Continuously Variable Transmission with Circumferentially Arranged Disks (CAD CVT)

Bilal,

Zhu,

Qureshi

et al. 2024

Actuators

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This paper presents a novel Continuous Variable Transmission (CVT) design. CVT is highly beneficial for actuators with rotary output as it can improve the energy efficiency of the actuators by providing an optimum transmission ratio. This property of CVT is highly beneficial for fossil-fuel-based vehicles, electric vehicles, wind turbines, industrial robots, etc. With the exception of Spherical CVT and DH CVT, all known CVTs like push belt CVTs, toroidal CVTs, Milner CVTs, etc., require additional gear sets and clutches for direction reversal and neutral gear ratio. However, Spherical CVT and DH CVT have low torque capacity due to a single traction point constraint. Foregoing in view, a new CVT named CAD CVT has been developed. The paper presents the design conception, the operating principle, the transmission ratio, the torque capacity, frictional losses, and experimental verification of the basic functionality by manufacturing a Proof of Concept (PoC). The proposed CVT is the only CVT capable of independent direction reversal and high torque capacity as it can transmit torque through multiple traction points. The new CVT will significantly impact high-torque applications in different engineering applications, especially land transport consisting of heavy vehicles like trucks, buses, and trailers.

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The Fatigue Failure Prediction of a Vari-Speed Drive with Different Rollers

Liu

Zhang²,

Shang³

et al. 2022

Proceedings of IncoME-VI and TEPEN 2021

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Research on a novel configuration synthesis method of no-spin traction continuously variable transmission

Cited by 5 publications

References 25 publications

Design Principles and Traction Performance of a Novel Zero-spin Rolling Conical Traction Continuously Variable Transmission

Design Principles and Traction Performance of a Novel Zero-spin Rolling Conical Traction Continuously Variable Transmission

A Novel Continuously Variable Transmission with Circumferentially Arranged Disks (CAD CVT)

The Fatigue Failure Prediction of a Vari-Speed Drive with Different Rollers

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