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Method for testing strength of upper support of shock absorber and shock absorber

A technology for strength testing and shock absorbers, which is applied in the field of shock absorbers and automobile shock absorbers, can solve problems such as inaccurate test data and inconsistency in the way of force, so as to improve test efficiency, shorten test time, and reduce test times Effect

Inactive Publication Date: 2021-03-19
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the model development stage, there are mainly the following test schemes for the assessment of the upper support strength: the upper support part bench test scheme and the drop hammer impact test scheme. When the tire is subjected to an impact load, the piston rod of the shock absorber will deflect at a certain angle, which will cause a certain lateral force. These factors lead to the inconsistency between the force bearing mode in the existing test plan and the real vehicle, and thus make the test data inconsistent. precise

Method used

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  • Method for testing strength of upper support of shock absorber and shock absorber
  • Method for testing strength of upper support of shock absorber and shock absorber

Examples

Experimental program
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Embodiment 1

[0032] The technical solutions in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings in this embodiment, but this should not be construed as limiting the present invention to a specific embodiment, but only for explanation and understanding:

[0033] The whole vehicle is a complete body consistent with the real vehicle, including the body and four wheels. The shock absorber is installed between the body and the wheels of the vehicle, and the shock absorber includes a piston rod 2 and an upper support 3 .

[0034] This embodiment provides a method for testing the strength of a support on a shock absorber,

[0035] Include the following steps:

[0036] Step S1: Establish a vehicle cratering model, simulate the cratering process of the whole vehicle, and obtain the maximum bearing force F of the piston rod 2 max , and determine the vehicle speed v based on the maximum bearing force of the piston rod 2 max .

[0037] Thr...

Embodiment 2

[0052] like figure 1 As shown, this embodiment provides a shock absorber for measuring the force on the piston rod 2, and the shock absorber is improved to facilitate the use of Embodiment 1.

[0053] The shock absorber includes a shock absorber, a piston rod 2 and an upper support 3 . The damping cylinder and the upper support 3 are sleeved on both ends of the piston rod 2 respectively, and a buffer sleeve 4 is provided between the damping cylinder and the upper support 3 .

[0054] One end of the piston rod 2 close to the upper support 3 sets has an opposite first side and a second side, and the first side and the second side are processed with avoidance grooves 201, and the avoidance grooves 201 on the first side and the second side are bottomed Both are provided with strain gauges 5 , that is, the strain gauges 5 are arranged at 0° and 180° of the circumferential surface of the piston rod 2 . Bottoms of the two avoidance grooves 201 are processed with embedding holes 202...

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Abstract

The invention discloses a method for testing the strength of an upper support of a shock absorber, and the shock absorber comprises a piston rod and the upper support, and the method comprises the following steps: building a complete vehicle pit punching model, simulating a complete vehicle pit punching process, obtaining the maximum bearing force Fmax of the piston rod, and determining the complete vehicle speed vmax based on the maximum bearing force of the piston rod; paving a test pavement, and designing a test pit on the test pavement; and pit punching is conducted on the whole vehicle, multiple test vehicle speed vn values are taken between vmax + / -vm, after the multiple test vehicle speed vn values pass through the pit and the whole vehicle passes through the pit, the shock absorberon the whole vehicle is disassembled, whether the upper support is damaged or not is checked, whether the strength of the upper support meets the use requirement or not is determined, and vm is a preset value. The method is accurate in test result and short in test period. The invention further discloses the shock absorber for measuring the stress of the piston rod.

Description

technical field [0001] The invention relates to the technical field of automobile shock absorbers, in particular to a method for testing the strength of a support on a shock absorber and a shock absorber. Background technique [0002] The upper support is an indispensable component of the automobile suspension system. The upper support is connected with the piston rod of the shock absorber through bolts. During the driving process of the car, part of the road excitation is directly transmitted to the upper support through the piston rod, and part is effected by the spring and buffer block. To the thrust bearing and then to the upper support. The main function of the upper support is to bear the vertical load transmitted by the suspension to the body. When it is subjected to a large impact load on the road (such as crossing a pit or a sill), if the strength of the upper support is insufficient, it will cause serious damage to the suspension system. big impact. [0003] In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/08G01M13/00G01M17/04F16F7/10
CPCG01M7/08G01M13/00G01M17/0078G01M17/04F16F7/10
Inventor 潘子安陈海滨李衡何洋
Owner DONGFENG MOTOR CORP HUBEI
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