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A method for controlling axial clearance of electric vehicle reducer

A technology of axial clearance and control method, which is applied in the direction of transmission control, components with teeth, belt/chain/gear, etc., can solve problems affecting user driving experience and improve driving comfort and quality , the effect of excellent abnormal noise performance

Active Publication Date: 2021-09-28
深蓝汽车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of abnormal noise is prominent in electric vehicles and seriously affects the driving experience of users

Method used

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  • A method for controlling axial clearance of electric vehicle reducer
  • A method for controlling axial clearance of electric vehicle reducer
  • A method for controlling axial clearance of electric vehicle reducer

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Experimental program
Comparison scheme
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Embodiment Construction

[0029] Such as Figure 1 to Figure 4 The fixed-ratio single-speed two-stage reducer shown is the mainstream type of electric vehicle reducer at present. The structure and abnormal noise mechanism of this type of reducer will be briefly explained below, and then its axial clearance control method will be elaborated.

[0030] Such as figure 1 , figure 2 As shown, the axial impact of the reducer occurs at the gap between the support bearings of the input shaft 2, the intermediate shaft 9 and the output shaft 16 and the limit end faces of the corresponding bearing chambers. When the vehicle is in the driving condition, the axial force direction of the shaft system is as follows: image 3 As shown by the solid line arrow 21 of , the axial direction of the shafting is reversed in the sliding condition, as shown in image 3 Shown by the dotted arrow 20. Therefore, when the vehicle is in the tip-in and tip-out operating conditions, the direction of axial force on the shaft system...

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Abstract

The invention discloses an axial clearance control method of an electric vehicle reducer, which uses the axial clearance meeting the reliability requirements of the bearings to correct the lower limit of the axial clearances of each shaft and meets the reliability requirements of the bearings; Carry out the test analysis and evaluation of the abnormal sound in the vehicle to determine the upper limit of the axial clearance of each shaft, which significantly reduces the abnormal axial impact noise of the reducer under the condition of stepping on the accelerator and releasing the accelerator; thus reducing the axial clearance of the electric vehicle reducer Controlled in an appropriate range, the electric vehicle transmission system has excellent abnormal noise performance while meeting the reliability requirements, and can improve the driving comfort and quality of the electric vehicle.

Description

technical field [0001] The invention belongs to the field of automobile transmission system reducers, and in particular relates to an axial gap control method of an electric automobile reducer. Background technique [0002] The axial clearance of the electric vehicle reducer refers to the space between the end face of the outer ring of the bearing of each shaft system inside the reducer and the limit end face of the bearing chamber of the housing. The axial clearance exists objectively. Appropriate axial clearance can make the overall performance of the reducer in an optimal state; if the axial clearance of the reducer is too small, the life of the reducer bearing will not meet the standard, and if the axial clearance of the reducer is too large, it will easily cause the problem of abnormal impact. [0003] The problem of abnormal impact noise is one of the common vibration and noise (NVH) problems in automobile transmission systems. If the vibration and noise caused by the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/12
CPCF16H61/12F16H2061/0012F16H2061/1224
Inventor 邓清鹏刘卫国邓承浩喻成金勇张孟哲丁艳平周安健杜长虹
Owner 深蓝汽车科技有限公司