Heavy-duty car frame bending torsion fatigue test bench device and method thereof

Abstract

The invention relates to the technical field of automobile part performance testing, in particular to a heavy-duty car frame bending torsion fatigue test bench device and a method thereof. The heavy-duty car frame bending torsion fatigue test bench device comprises a frame assembly, a front suspension assembly, a rear suspension assembly, a front axle, a rear axle, an air bag loading unit, a firsttorsion oil cylinder, a second torsion oil cylinder, a third torsion oil cylinder and a fourth torsion oil cylinder, the first torsion oil cylinder and the second torsion oil cylinder are movably connected with the two ends of the front axle respectively, and the third torsion oil cylinder and the fourth torsion oil cylinder are movably connected with the two ends of the rear axle respectively; the air bag loading unit is arranged at the rear part of the frame assembly, the air bag loading unit comprises a bottom plate, a top plate, a plurality of air bags arranged between the bottom plate and the top plate, and a ventilation device for injecting gas into each air bag. According to the invention, the cost of the heavy-duty car frame bending torsion fatigue test bench device can be reduced, and the dynamic load state of a real vehicle in the driving process can be truly simulated.

Description

technical field [0001] The invention relates to the technical field of performance testing of automobile parts, in particular to a heavy-duty automobile frame bending-torsion fatigue test bench device and a method thereof. Background technique [0002] The heavy-duty vehicle frame assembly is usually the main part of the heavy-duty vehicle to carry the load, and these loads have a bending effect on the frame. Bending and torsional deformation, so it is very important to design a test bench device for testing the bending and torsional fatigue strength of the frame of heavy vehicles. [0003] Taking the tractor as an example, the traditional tractor bending-torsion combined test bench device has the following defects: First, the traditional tractor bending-torque combined test bench adopts the design idea of ​​loading static load at the saddle, combined with image 3 As shown, a fixed load of 16T is applied through the vertical load actuator 16, and then a certain torsion angl...

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Problems solved by technology

[0003] Taking the tractor as an example, the traditional tractor bending-torsion combined test bench device has the following defects: First, the traditional tractor bending-torque combined test bench adopts the design idea of ​​loading static load at the saddle, combined with image 3 As shown, a fixed load of 16T is applied through the vertical load actuator 16, and then a certain torsion angle is applied to the center of the two ends of the front suspension of the frame assembly 1 through the torsion actuator 18, so as to realize the bending and torsion fatigue test of the frame , this test bench device simulates the static load state of the frame, which cannot simulate the real dynamic load state of the real vehicle when driving on uneven roads; secondly, the traditional tractor bending and twisting combined test bench device The uniform distribution of the liquid usually requires a large number of hydraulic loading devices, and the high price of the hydraulic loading device greatly increases the cost of the test

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