The impact test device and method of the falling mechanism of the front subframe of the automobile

Abstract

The invention relates to an impact testing device and an impact testing method of an automobile front subframe shedding mechanism. The impact testing device is provided with an impact head driven by an impact test driving device and an impact block cooperated with the impact head. An inner side of a front subframe sample piece is provided with a fixing nut, and a long bolt is fixedly connected with the fixing nut after sequentially passes through a pull-out device body and a shaft sleeve. The pull-out device body is provided with a pull-out pin, which horizontally passes through the pull-out device body, and the two ends of the pull-out pin are in a hinged connection with a pull-out fork. Based on a CAE simulation analysis result of a front subframe offset impact working condition, a force application angle and force application magnitude are acquired. The front subframe sample piece is fixedly disposed on a testing angle base, and the inclined angle of the inclined surface of the testing angle base is the same as the force application angle required by the test. By adjusting the output energy of the impact test driving device, the initial kinetic energy of the impact head is greater than the minimum energy required by pull-out motion of a testing sample piece. Under the action of the impact of the impact head, the impact block is used to drive the pull-out fork to act, and then the pull-out fork is used to carry out the pull-out motion by the long bolt under the driving of the pull-out pin.

Description

technical field [0001] The invention relates to an impact test device and method for a falling off mechanism of a front auxiliary frame of an automobile. Background technique [0002] In the prior art, gaps are provided in the bolt holes at the installation points of the front sub-frame and the body bracket, and the connecting bolts between the front sub-frame and the body bracket can fall off through the gap under certain stress conditions, so that when the front collision of the car occurs, , The front sub-frame can be detached from the body, driving the powertrain system connected to it to sink, thereby increasing the crushing space of the front longitudinal beam during the front collision of the car and improving the safety of the car. [0003] The prior art most related to the present invention is the patent with the notification number CN201310589575.7 and the title of the invention is "A Mounting Fixture and Its Simulation Test Method for Simulating the Sub-frame Drop...

AI Technical Summary

Problems solved by technology

[0003] The prior art most related to the present invention is the patent with the notification number CN201310589575.7 and the title of the invention is "A Mounting Fixture and Its Simulation Test Method for Simulating the Sub-frame Drop-off Test of Automobile", and the disadvantages of this technical solution The disadvantage is that it is inconvenient to operate, and it cannot truly and effectively simulate the working conditions of the front collision of the car

At present, the impact test device that can truly and effectively simulate the mechanism of the car's front sub-frame falling off is still blank

Images