Research on Dynamics of Wheel-rim Reducer Used in Electric Vehicle Considering Gear Teeth Modifications

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (20) : 254-260.

SONG Chao-sheng1, 2，WENG Yan-xiang2，ZHU Cai-chao1，XIANG Chao1，LIU Huai-ju1

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Abstract

The objective of this research is to reveal the mesh characteristics and dynamics of wheel-rim reducer used in electric vehicle considering gear teeth modifications. Three types of strategiesfor the tooth modification were proposed. And the contact patterns for the related gear pairs were calculated based on the systematic mesh model considering the tooth modification strategies. Then a multi-body dynamic model for the geared rotor system in wheel-rim reducer were setup using lumped parameter method consideringthe mesh stiffness and transmission error excitations. The dynamic mesh force and acceleration responses of the equivalent bearing support were calculated. The results show that poor contact patterns with edge contact existed without teeth modifications. Independent linear relief and independent crowning relief along the axial direction for the high-speed gear pair can improve the contact patterns obviously. And linear relief with crowning relief along the axial direction and crowning relief or pressure angle modification along the profile direction for low-speed gear pair can improve the contact patterns obviously. For the proposed three types of strategiesfor the tooth modification can decease the transmission error, dynamic mesh force and the acceleration responses of the equivalent bearing support obviously both for the high-speed and low-speed gear pair. Finally, the gear tooth strategy linear relief with crowning relief along the axial direction and crowning relief along the profile direction was recommended to design the gears of wheel-rim reducer used in electric vehicle.

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SONG Chao-sheng1, 2，WENG Yan-xiang2，ZHU Cai-chao1，XIANG Chao1，LIU Huai-ju1. Research on Dynamics of Wheel-rim Reducer Used in Electric Vehicle Considering Gear Teeth Modifications[J]. Journal of Vibration and Shock, 2017, 36(20): 254-260

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