Static Modelling and Analysis of a Novel Movable Tooth Drive with Logarithmic Spiral Tooth Profiles

Zhou, Guocheng; Yang, Yuhu

doi:10.3390/machines10100837

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…Chang and Chang 9 introduced the working principle of the involute gear reducer designed by the vernier effect, and verified the correctness of the model by FEM analysis. Zhou and Yang 10 proposed a movable teeth drive with a logarithmic helix as the tooth profile, and discussed the influence of size parameters on the self-locking and force transmission characteristics of the gear teeth. Xu and Yang 11 studied the relative speed and meshing efficiency of a ball drive, and experimentally verified the superiority of the reducer.…”

Section: Introductionmentioning

confidence: 99%

Geometric design and dynamic characteristics of a novel abnormal cycloidal gear reducer

Gong

Luo

et al. 2023

Advances in Mechanical Engineering

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A precision reducer with a high ratio and a small size is essential for precise control of the position of a robotic arm. The rotate vector (RV) is a reducer widely applied in robotic joints. However, its complex structure, over-positioning and difficult assembly restrict its application industrial robots. Herein, a novel abnormal cycloidal gear (ACG) reducer is proposed. In comparison to the RV reducer, the proposed reducer has the characteristics of compact structure, less over-positioning and high ratio. The compound tooth profile of “epicycloid-involute hypocycloid” is used as the driving teeth for improving the performance of the reducer. The operating principle, mechanism design and reduction ratio of the proposed reducer is investigated, and the design method of the ACG tooth profile is also introduced. A dynamic characteristic model is established to verify the correctness of the design method of the reducer. A prototype of the ACG reducer is fabricated by using the computer numerical control (CNC) machining technology. Results show that the ACG reducer is capable to cover a wide range of reduction ratios with a simple mechanism. The numerical and theoretical results are in agreement, which depict the structural feasibility and correctness of the design method of the reducer. The adaptation of the ACG tooth profile as the driving teeth helps in improving the performance of the reducer.

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Section: Introductionmentioning

confidence: 99%

Geometric design and dynamic characteristics of a novel abnormal cycloidal gear reducer

Gong

Luo

et al. 2023

Advances in Mechanical Engineering

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A novel harmonic movable tooth drive with almost surface contact conjugate tooth profiles: Parametric design, modification and analysis

Zhou,

Yang,

Xie

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper focuses on a novel harmonic movable tooth drive as an alternative of currently used harmonic gear drives. Different from the harmonic gear drives, the novel drive removes small module teeth from thin-walled flexible rim, instead, adopts several rigid movable teeth with logarithmic spiral tooth profile. Such tooth geometry makes almost surface contact possible under load condition, in comparison with the conventional involute tooth profile creating a linear contact. Aiming at the issue of cusp meshing between movable tooth and ring gear during the meshing process, this paper proposes a modification design method for the conjugate tooth profiles. First, the radial motion law of movable tooth is modified, in order to avoid rigid impacts at the exchange point of the rise travel and return travel. Then, the tooth profile of ring gear is generated by the envelope of the modified profile of movable tooth. Based on the formulated modification scheme, the equations of the conjugate tooth profiles are derived, and the influences of spiral angle and modification parameters on the meshing characteristics are systematically investigated. Finally, the wave generator cam profile and pivoted segment profile are established considering the strength consistency. The outcomes can provide significance guidance for the parametric design and optimization of this novel drive.

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Static Modelling and Analysis of a Novel Movable Tooth Drive with Logarithmic Spiral Tooth Profiles

Cited by 2 publications

References 31 publications

Geometric design and dynamic characteristics of a novel abnormal cycloidal gear reducer

Geometric design and dynamic characteristics of a novel abnormal cycloidal gear reducer

A novel harmonic movable tooth drive with almost surface contact conjugate tooth profiles: Parametric design, modification and analysis

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