Wall thickness calipers for drum brake and hub

Abstract

The invention discloses wall thickness calipers for drum brakes and hubs, which solve the problem that the measurement error of the conventional calipers is so big as to influence the production process quality control of automobile brake drums or hubs. The calipers comprises a lower caliper body (1), an upper caliper body (2) and a main shaft (6), wherein the upper and lower caliper bodies on the left side of the main shaft (6) are fixedly provided with a lower tension spring fastening nail (10) and an upper tension spring fastening nail (11) respectively and a spring (9) is arranged between the two fastening nails; and the upper caliper body (1) on the right sided of the main shaft (6) is fixedly provided with a lower dialgage clamping block (3) which is a cubic block, the upper caliper body (2) on the right side of the main shaft (6) is fixedly provided with upper dialgage clamping blocks (4), the measurement probe of a dialgage (5) is fixedly arranged in grooves on the fastening connection faces of the two upper dialgage clamping blocks (4) and the top end of the measurement probe of the dialgage (5) is in movable contact with the top face of the lower dialgage clamping block (3). The calipers are suitable for the high-precision measurement of the wall thickness of the automotive brake drums or hubs.

Description

technical field [0001] The invention relates to a caliper, in particular to a device for measuring the thickness of an annular workpiece such as a brake drum or wheel hub of an automobile after being clamped. Background technique [0002] In the prior art, the traditional wall thickness caliper is used to measure the thickness of the ring-shaped workpiece. One end of this caliper is a clamping part, and the other end is a value display part. The middle part is connected by a hinge, and the structure is similar to scissors. During the detection, the clamping part of the clamping workpiece is operated manually. Due to the difference in the strength of the operator's hand, the measured value is inaccurate and the accuracy is not high; The millimeter scale inlaid at one end of the caliper is completed, which further increases the error. Due to the defect of large measurement error of traditional calipers, it has seriously affected the control of the production process quality o...

AI Technical Summary

Problems solved by technology

[0003] The brake drum and wheel hub wall thickness caliper provided by the present invention solves the technical problem that existing automobile brake drums or wheel hubs have inaccurate measurement of their wall thickness in the production process, thus affecting the improvement of the production process quality.

Images