A cross shaft size measuring device

Abstract

The invention provides a universal joint size measurement device. The device comprises a bottom plate for supporting a universal joint, the bottom plate is provided with a measurement mechanism used for measuring the axial length of the universal joint and the diameter of a shaft neck, the measurement mechanism comprises two first probes, two second probes, a displacement sensor, a driving assembly and a driving device, the two first probes can make contact with two axial shaft neck ends of the universal joint respectively, the two second probes can abut against the two shaft neck side walls respectively, the displacement sensor is used for measuring the displacement amount of the first probe and the displacement amount of the second probe, the driving assembly is used for driving the two probes and the two second probes, and the driving device drives the displacement sensor to move to or opposite to the first probes and the second probes. An indirect measurement means is used in the measurement device, the displacement sensor is prevented from making direct contact with the universal joint, the displacement sensor is effectively protected, and the service life is prolonged. The measurement device achieves point contact, and the problems that during surface contact or linear contact, a measurement device is low in machining precision and precision is difficult to guarantee are avoided.

Description

technical field [0001] The invention relates to a measuring device, in particular to a cross shaft size measuring device. Background technique [0002] The cross shaft, also known as the ten-byte, is a machine that realizes variable-angle power transmission. It is used for the position where the direction of the transmission axis needs to be changed. It is the "joint" part of the car drive system. At present, the measurement of the axial length of the cross shaft and the diameter of the journal is mainly based on surface contact and line contact, so the processing requirements for the probe and the fixed surface (processed part) used for measurement are very high, and the accuracy is difficult to guarantee. Moreover, the production cycle is long, and the adjustment and maintenance costs are high; in the prior art, the size measurement is performed by directly contacting the product with the displacement sensor, without corresponding protection measures, resulting in short li...

AI Technical Summary

Problems solved by technology

At present, the measurement of the axial length of the cross shaft and the diameter of the journal is mainly based on surface contact and line contact, so the processing requirements for the probe and the fixed surface (processed part) used for measurement are very high, and the accuracy is difficult to guarantee. Moreover, the production cycle is long, and the adjustment and maintenance costs are high; in the prior art, the size measurement is carried out by directly contacting the product with the displacement sensor, without corresponding protection measures, resulting in short service life of the displacement sensor, high frequency of damage, and increased maintenance costs

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