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Fatigue testing device for lateral dynamic bending of piston rod of vibration damper

A dynamic bending and fatigue test technology, applied in measuring devices, using repetitive force/pulse force to test the strength of materials, instruments, etc. Convenience and the effect of ensuring product quality

Active Publication Date: 2010-04-21
锦州万友机械部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no device for performing lateral dynamic bending fatigue tests on shock absorber piston rods, which makes it difficult to guarantee the product quality of automobile shock absorbers.

Method used

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  • Fatigue testing device for lateral dynamic bending of piston rod of vibration damper
  • Fatigue testing device for lateral dynamic bending of piston rod of vibration damper
  • Fatigue testing device for lateral dynamic bending of piston rod of vibration damper

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Experimental program
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Embodiment Construction

[0014] As shown in the figure, the shock absorber piston rod lateral dynamic bending fatigue test device has a simple harmonic motion mechanism driven by a driving device to provide simple harmonic excitation, and the driving device is composed of a driving motor 21 and a reducer 22 The simple harmonic motion mechanism is a crank-link slider mechanism, and a cam mechanism, a sheave mechanism or other mechanisms that can realize simple harmonic motion can also be used. This embodiment takes the crank-link slider mechanism as an example . The crank-link slider mechanism includes a shaft seat 23, on which a rotatable drive shaft 24 is installed, one end of the drive shaft 24 is connected with the speed reducer 22, and the other end is fixedly connected with the turntable 12, on the turntable 12 An adjusting screw 13 is installed on the radial direction through two sets of bearings. An adjusting motor 11 is fixed at one end of the adjusting screw 13 on the outer edge of the turnta...

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Abstract

The invention relates to a fatigue testing device for lateral dynamic bending of a piston rod of a vibration damper, which is provided with a simple harmonic motion mechanism driven by a driving device to be used for providing simple harmonic excitation; a spring support is sleeved outside an output component of the simple harmonic motion mechanism; two pressure springs which are arranged from top to bottom are arranged in the spring support; the output component of the simple harmonic motion mechanism is clamped between the two pressure springs; the upper end of the spring support is connected with a force sensor; the upper end of the force sensor is connected with a universal connector; and the device is also provided with a fixing clamp and a data acquiring and processing system, wherein the signal output end of the force sensor is connected with the data acquiring and processing system. The invention has the advantage that bidirectional symmetric exciting force with the same maximum value can be applied to piston rods of various specifications to enable each piston rod to complete excitation for the set times under a certain excitation frequency, thus the fatigue strength of lateral dynamic bending of the piston rod of the vibration damper can be detected to ensure the product quality.

Description

technical field [0001] The invention relates to a device for fatigue testing the piston rod of the automobile shock absorber, in particular to a lateral dynamic bending fatigue test device for the piston rod of the shock absorber. Background technique [0002] The shock absorber in the automobile suspension system mostly adopts the double cylinder piston type hydraulic shock absorber. In the automobile suspension system, the shock absorber is installed in parallel with the elastic element, its upper end is connected with the frame or body, and its lower end is connected with the axle. When the car is running, the piston rod of the shock absorber not only bears the random alternating axial force, but also bears the random alternating lateral force. The alternating lateral force is easy to cause fatigue fracture of the piston rod, so the piston rod bends laterally Fatigue life is related to the stability and safety of vehicle driving. However, there is no special device for ...

Claims

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Application Information

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IPC IPC(8): G01N3/34G01N3/06
Inventor 曾庆东梁海林王天利孙晓帮
Owner 锦州万友机械部件有限公司
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