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A method for determining the length of the semi-axis of an fsae racing car and checking the runout

A technology of axle length and rear axle, applied in the field of FSAE racing long half-axle length determination and runout checking, can solve the problems of dead, falling off of moving joints, lack of checking the length and angle of the transmission half-axle, etc., to ensure safety , Improve the service life, the effect of simple calculation and calibration methods

Inactive Publication Date: 2019-07-02
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the lack of checking the length and angle of the transmission half shaft in the prior art, the purpose of the present invention is to provide a method for determining the length of the half shaft of the FSAE racing car and checking the jump, so as to avoid the racing car under certain extreme working conditions. The problem that the mobile section top is dead or falling off

Method used

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  • A method for determining the length of the semi-axis of an fsae racing car and checking the runout
  • A method for determining the length of the semi-axis of an fsae racing car and checking the runout
  • A method for determining the length of the semi-axis of an fsae racing car and checking the runout

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Embodiment 1: Determination of semi-axis length

[0064] Take the oil truck design of Chang'an University's 2015 Hunting Team as an example:

[0065] 1. Known data

[0066] The three-dimensional coordinates of the whole vehicle during the design process of the 2015 Chang’an University’s 2015 Leafer Racing Team are as follows:

[0067] Coordinate origin: the intersection of the vertical projection line of the rear axle on the ground and the longitudinal center plane of the car; X-axis: a straight line parallel to the horizontal plane passing through the origin on the longitudinal center plane of the car, and the positive direction is from the rear axle to the front axle; Y Axis: the vertical line of the longitudinal center plane of the racing car passing through the origin, with the driver as a reference, the positive direction is from right to left; Z axis: a straight line passing through the origin and perpendicular to the horizontal plane, the positive direction is f...

Embodiment 2

[0085] Embodiment 2: Calibration of half axis

[0086] The method for determining the half shaft length of the FSAE racing car is the same as in embodiment 1, the difference is that the verification process of the half shaft is as follows:

[0087] The three-pin shafts used in the outer and inner ball cages are the three-pin shafts of Alto’s inner ball cage, and the raceway sizes are the same. Since the depth of the raceway (70mm) on the side of the hub is relatively deep, the inner ball cage’s side The depth of the raceway (50mm) is relatively shallow. Since the three-pin shafts at both ends move in the two raceways when the half-shaft is beating with the wheel, so to calculate the maximum half-shaft inclination angle allowed by the three-pin shaft groove, use the outer ball The cage raceway is used for calculation; the diameter of the long semi-axis is 21mm, the minimum diameter of the three-pin raceway is 40mm, and the depth of the raceway is 70mm. Draw a sketch on CATIA as...

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Abstract

The invention discloses a FSAE racing car semiaxis length determination and bounce checking method comprising the following steps: building a vehicle three dimensional coordinate system; respectively calculating semiaxis workspace lengths and angles when rear wheels still, jump up to a limit position and jump down to a limit position; determining the semiaxis length according to work space lengths in the step 2; comparing the semiaxis inclination angle allowed by a ball cage raceway and the semiaxis inclination angle when the semiaxis jumps to the limit position with wheels, and determining semiaxis design rationality according to sizes of said two. The method can solve the problems that a conventional method can only check the length and angle of the transmission shaft transmitting speed changer rotations to a main deceleration; the calculation and checking method is easy to calculate and realize, thus improving vehicle transmission system design and manufacture precision, and ensuring vehicle operation security.

Description

technical field [0001] The invention relates to the technical field of automobile transmission, in particular to a method for determining the length of the long semi-axis of an FSAE racing car and checking the runout. Background technique [0002] At this stage, the check of the length and angle of the drive shaft mainly refers to the check of the length and angle of the shaft that transmits the rotation of the transmission to the main reducer, and only the strength check of the drive half shaft. The basic function of the transmission system is to transmit the power from the engine to the driving wheels of the car to generate driving force so that the car can run at a certain speed. The torque is sequentially transmitted to the Dalian wheel through the small sprocket through the chain, and then through the differential case, the differential intermediate cross shaft, the half-shaft gear, the short half-shaft (integrated with the ball cage), the long half-shaft, and the tripo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00G01B21/04
CPCG01B5/0025G01B21/00G01B21/04
Inventor 魏敬东邢亚山肖旭辉刘伟焦纪超
Owner CHANGAN UNIV
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