Driving shaft run-out checking method

Abstract

The invention belongs to the technical field of vehicle design, and discloses a drive shaft run-out checking method, which comprises the following steps of: establishing a suspension DMU model throughCATIA software; setting section types of the inner section and the outer section, and determining theoretical inner node coordinates and first set point coordinates; building the outer node in a DMUmodel, jumping the DMU model, and obtaining theoretical outer node coordinates and coordinates of a second set point; solving and obtaining actual inner node coordinates under a plurality of differentjumping working conditions; perofrmingsolving according to the corresponding coordinates to obtain the slippage, the inner section included angle and the outer section included angle of the inner node under a plurality of different jumping working conditions; and adjusting the length of the shaft rod so as to enable the outer section included angle to be within the allowable value of the outer section included angle, and enabling the slip-swing angle curve to be located in the middle of the slip-swing angle safety boundary line. According to the method, the CATIA software is adopted to perform run-out checking on the driving shaft, only one suspension model needs to be built, simulation tests do not need to be performed on the lengths of the driving shaft one by one, and driving shaft checking can be performed quickly and accurately.

Description

technical field [0001] The invention relates to the technical field of vehicle design, in particular to a drive shaft runout checking method. Background technique [0002] The drive shaft runout check is an important step in the design process of passenger vehicles. Unreasonable design of the length and angle of the drive shaft may lead to serious consequences such as drive shaft jamming, prolapse, and damage. [0003] In the prior art, the runout of the drive shaft is generally checked through the DMU (Digital Mockup) module in the CATIA software. During the check, it is necessary to check the jump point one by one, and the length of the drive shaft is tested one by one. This check method is often time-consuming. It is difficult to find the optimal solution, and there may be inaccurate calibration. [0004] In addition to using CATIA software, there is also a way of using ADMAS software to check the drive shaft in the prior art. Through the setting of configuration paramet...

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Problems solved by technology

[0002] The runout check of the drive shaft is an important step in the design process of passenger cars. Unreasonable design of the length and angle of the drive shaft may lead to serious consequences such as drive shaft jamming, detachment, and damage

[0003] In the prior art, the runout of the drive shaft is generally checked through the DMU (Digital Mockup) module in the CATIA software. During the check, it is necessary to check the jump point one by one, and the length of the drive shaft is tested one by one. This check method is often time-consuming. It is difficult to find the optimal solution, and there may be inaccurate calibration

[0004] In addition to using CATIA software, there is also a way of using ADMAS software to check the drive shaft in the prior art. Through the setting of configuration parameters, measurement and simulation, the check and analysis of the slip distance and swing angle of the drive shaft are completed. This method has the following three deficiencies: 1. Automotive structural design engineers generally use CATIA design software for structural design, while ADMAS software is a structural analysis software, and design engineers may not be able to use it or use it unskilledly, and the use is not enough Convenience; 2. It is necessary to establish the DMU model of the suspension in ADMAS during the analysis. When designing the automobile suspension, the DMU model of the suspension has been established by CATIA. If it is only designed for the drive shaft, it is necessary to establish the suspension model again. The drawbacks of duplication; 3. The internal node position, rotation angle, and external node rotation angle need to be measured and exported to data processing software (such as Excel) for further analysis through ADMAS software, which has the disadvantage of inconvenient use

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