考虑轮齿修形的电动车轮边减速器动态啮合性能研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (20) : 254-260.

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宋朝省1，2，翁燕祥2，朱才朝1，向超1，刘怀举1

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

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

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摘要

为揭示考虑修形条件下电动车轮边减速器啮合特性与动态特性，提出三种轮齿修形方案，建立电动车轮边减速器啮合模型，获取不同修形方案下的轮齿啮合印痕；考虑修形条件下的系统刚度激励与传动误差激励，建立了电动车轮边减速器多体多自由度系统动力学模型，获取系统动态啮合力与动态轴承支承响应。结果表明未修形条件下，轮齿啮合印痕分布较差，边缘接触明显；高速级单独齿向线性修形与起鼓修形可有效改善啮合印痕，低速级齿向采用线性修形配合起鼓修形，齿形采用起鼓修形或压力角修形可有效改善啮合印痕；三种修形方案使得输入高速级与输出低速级传动误差与动态啮合力，各轴动态轴承支承响应均明显改善，推荐在电动车轮边减速器设计中采用齿向线性或起鼓修形配合齿形起鼓修形。

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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宋朝省1，2，翁燕祥2，朱才朝1，向超1，刘怀举1. 考虑轮齿修形的电动车轮边减速器动态啮合性能研究[J]. 振动与冲击, 2017, 36(20): 254-260

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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