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A Suspension Device for Free Modal Test of Transmission Case

A transmission case and suspension device technology, applied in the field of vehicles, can solve the problems that the transmission case cannot be guaranteed to be parallel, and cannot meet the special requirements of the transmission case free modal test, so as to achieve increased stability and strength, high strength, The effect of ensuring accuracy

Active Publication Date: 2017-12-15
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the test sample is suspended by a suspension device. Since the transmission housing is of irregular shape, the suspension device in this patent cannot ensure that a certain plane of the transmission housing is parallel to the horizontal plane, and cannot satisfy the free modal test of the transmission housing. special requirements

Method used

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  • A Suspension Device for Free Modal Test of Transmission Case
  • A Suspension Device for Free Modal Test of Transmission Case
  • A Suspension Device for Free Modal Test of Transmission Case

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as Figures 1 to 4 As shown, a suspension device for the free modal test of the transmission housing, the suspension device includes a bracket 11 and four elastic ropes, the bracket 11 includes four bracket feet 12 and a connecting frame 13 that fixes the upper ends of the bracket feet 12, and the bracket feet 12 are distributed in a circular ring at equal intervals, and the connecting frame 13 is parallel to the horizontal plane. There is an angle a between the bracket foot 12 and the connecting frame 13, and the angle a is an obtuse angle. In the first embodiment, the angle a is 80°. The angle can ensure that the bracket feet 12 can stably and stably support the quality of the transmission housing under the condition of small space occupation; the middle part of the bracket 11 has a suspension chamber 11a that can accommodate the transmission housing, and the cross section of the suspension chamber 11a gradually changes from top to bottom. Large, each bracket foo...

Embodiment 2

[0035] The structure and principle of this embodiment are basically the same as that of Embodiment 1. The difference is that the hook 21 is arranged on the connecting frame 13, the hook 21 has a rod-shaped connecting portion 23, and one end of the connecting portion 23 is fixed on a curved Hook-shaped hook portion 22 and the handle fixed on the other end of connecting portion 23, the middle part of connecting frame 13 has a measuring rod 41 vertically fixed upwards, and measuring rod 41 has a scale capable of measuring height. The adjustment and positioning structure includes at least three positioning holes provided on the connecting frame 13 and external threads provided on the outer peripheral surface of the connecting part 23. The positioning holes are distributed in a ring, and internal threads are provided on the wall of the positioning holes. The hook part 22 is located at In the suspension chamber 11a, the connecting portion 23 passes through the positioning hole and is...

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Abstract

The invention provides a suspension device of a gearbox housing free mode test, and belongs to the technical field of vehicles. The technical problem that a suspension device of an existing gearbox housing free mode test cannot meet the special requirement for the gearbox housing free mode test is solved. The suspension device of the gearbox housing free mode test comprises a support and at least three elastic ropes, a suspension cavity capable of containing a gearbox housing is formed in the middle of the support, at least three hooks are arranged on the support, adjusting and locating structures which can adjust the hooks to enable the hooks to move vertically and locate the hooks are arranged between the hooks and the support, one ends of the elastic ropes are fixedly arranged on the corresponding hooks, and the other ends of the elastic ropes are fixedly arranged on the same plane of the gearbox housing. The suspension device has the advantages of guaranteeing accuracy of the gearbox housing free mode test and improving test efficiency.

Description

technical field [0001] The invention belongs to the technical field of vehicles, and relates to a free modal test of a transmission case, in particular to a suspension device for a free modal test of a transmission case. Background technique [0002] Experimental modal analysis is a vibration test performed to determine the modal parameters of a linear vibrating system. Modal parameters are a description of the inherent characteristics of the vibration system in the frequency domain, generally referring to the natural frequency, damping ratio, mode shape, and modal quality of the system. In the modal test, the response signal is obtained by measuring the system with a given excitation, and then the modal parameters of the system are obtained by applying the modal parameter identification method. [0003] Free mode is an inherent property of free vibration of a structure, which is only related to the structure itself and has nothing to do with external excitation. The actua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
Inventor 褚淑敏窦红印罗大国陈勇吴成明冯擎峰
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD