Coaxiality detection tool for transmission shaft

Abstract

The invention provides a coaxiality detection tool for transmission shaft, which comprises a workbench, whereupon a rotating air cylinder is arranged, a workpiece fixing shaft is arranged on the output shaft of the rotary air cylinder, a transmission shaft is arranged on the fixed shaft of the workpiece, and the inner wall of the transmission shaft is in close contact with the surface of the workpiece fixing shaft; a balance block is arranged above the workpiece fixing shaft, the balance block comprises an upper plane and an inner concave arc-shaped limiting bottom surface which are horizontally arranged, the arc-shaped limiting bottom surface is coaxially arranged with the transmission shaft, and the transmission shaft can be embedded in the arc-shaped limiting bottom surface; a spring issymmetrically connected on the left and right sides of the bottom surface of the balance block, and the lower end of the spring is fixed on the workbench; also comprises a fixing frame, wherein the fixed frame is provided with a dial indicator, and the dial gauge of the dial indicator can be contacted with the upper plane of the balance block. The balance block of the invention converts the point-to-point instantaneous discrete type contact between the dial indicator and the transmission shaft into stable continuous contact of the point-to-surface of the transmission shaft, which improves thedetection precision, and the needle will not scratch the surface of the transmission shaft, thereby ensures the appearance quality of the transmission shaft.

Description

technical field [0001] The invention belongs to the technical field of transmission shaft processing, and in particular relates to a coaxiality detection tool for a transmission shaft. Background technique [0002] The transmission shaft is a movable or rotating circular object accessory, used to connect or assemble various accessories, and is generally made of light alloy steel pipe with good torsion resistance. In the production process of the transmission shaft, the coaxiality of the transmission shaft is an important parameter. If the coaxiality is out of tolerance, the transmission bearing may be subjected to the torque caused by the bending moment. During the rotation process, alternating stress will be generated, which will cause fatigue and fracture of the bolts. Therefore, it is very important to test the coaxiality of the formed transmission shaft. The traditional detection method is to measure the diameter of multiple fixed points of the transmission shaft body w...

AI Technical Summary

Problems solved by technology

However, due to the point-to-point contact between the needle of the dial indicator and the arc surface of the transmission shaft during the detection process of the transmission shaft, the contact area is small and the contact time is short, so this detection method has the characteris

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