Special tool for detecting the thickness of a bendable friction block

Abstract

The invention belongs to the technical field of vehicle detections, more particularly, to a special tool for detecting the thickness of a bendable friction block. The special tool comprises a ruler rod and ruler sleeve. The ruler sleeve is capable of being arranged on the ruler rod in a rotation and sliding manner. The length of the ruler sleeve is smaller than that of the ruler rod. The two ends of the ruler rod are respectively provided with a pressing and leaning section and a data reading section. The data reading section is provided with scales in the axial direction. The outer circumferential surface of the ruler sleeve close to the pressing and leaning section is fixedly provided with a connection rod; the connection rod is located in the radial direction of the ruler sleeve. The connection rod is articulated with a pressing head; and the articulation center line is parallel with the central shaft of the ruler sleeve. The top wall of the pressing head is closely attached with the bottom wall of the connection rod; the difference between the lengths of the ruler rod and the ruler sleeve is equal to the measurement range of the scale. The zero scale value of the scale is what is obtained when the top wall of the pressing head is aligned with the lower end wall of the pressing and leaning section. The special tool is advantageous in the following aspects. It can conveniently penetrate the clearance between the wheel hubs. It has a long contact length which allows it to be conveniently in contact with a friction block and makes it applied more widely. The tool is capable of measuring precisely and accurately under the condition that the brake disc is not dismantled. Convenient to use, the tool has a simple structure and can be manufactured conveniently.

Description

technical field [0001] The invention belongs to the technical field of vehicle detection, and in particular relates to a special measurer for the thickness of a bendable friction block. Background technique [0002] Disc brakes are widely used in automobiles because of their good heat dissipation, no need to adjust the brake pad clearance during use, and convenient maintenance. Such as image 3 As shown, the brake of the disc brake includes a brake pad and a brake disc 5 , the brake pad includes a metal base 3 and a friction block 4 , and the metal base 3 and the brake disc 5 are respectively arranged on both sides of the friction block 4 . [0003] However, the friction block 4 on the disc brake pad will gradually become thinner during use, and when the friction block 4 wears to the limit, the braking force will drop and the metal base 3 on the brake pad will rub against the brake disc 5 and damage the brake disc 5, In current automobiles, the brake pads installed in high-...

AI Technical Summary

Problems solved by technology

[0003] However, the friction block 4 on the disc brake pad will gradually become thinner during use, and when the friction block 4 wears to the limit, the braking force will drop and the metal base 3 on the brake pad will rub against the brake disc 5 and damage the brake disc 5, In current automobiles, the brake pads installed in high-end automobiles are equipped with automatic alarm devices for friction block wear. Most automobiles need to manually check the thickness of friction block 4 when maintaining each time. Mainly, the reason is that it is inconvenient to accurately measure the thickness of the friction block 4 by using the existing vernier caliper without removing the brake pads from the brake. Although the thickness of the friction block 4 can be roughly estimated by visual inspection, the estimated value is not accurate. For the sake of driving safety, maintenance workers generally ask the owner to replace the brake pads in advance when the thickness of the friction block 4 does not actually reach the limit value. On the other hand, due to the misjudgment of the maintenance worker, the brake pads that should have been replaced were not replaced in time.

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