A tool for detecting the coaxiality of rectangular grooves in brake calipers

Abstract

The invention discloses a tool for detecting the coaxiality of a rectangular groove of a brake caliper body, characterized in that a caliper positioning detection cylinder is provided on a workbench, a first connecting rod and a second connecting rod are vertically arranged in the caliper positioning detection cylinder, a main detection head abutting against an inner wall of a piston hole is provided at the upper end of the first connecting rod, a lower end of the first connecting rod is connected to a slide, a middle part of the second connecting rod is rotatably connected to the middle part of the first connecting rod, an auxiliary detection head abutting against the inner wall of the rectangular groove is provided at the upper end of the second connecting rod, a lower end of the second connecting rod abuts against an input end of a micrometer, the micrometer moves with the slide, a tensioning member is connected to the lower part of the second connecting rod to make the second connecting rod close to the first connecting rod, the caliper positioning detection cylinder is provided with an outlet for the main detection head and the auxiliary detection head to extend to the outside, the first connecting rod or the slide is connected to an elastic member, the elastic member has an elastic force that drives the first connecting rod or the slide to move so that the main detection head and the auxiliary detection head abut against the inner wall of the piston hole and the inner wall of the rectangular groove respectively.

Description

Technical Field

[0001] The invention relates to a product coaxiality inspection tool, in particular to a brake caliper body rectangular groove coaxiality inspection tool. Background Art

[0002] At present, the rectangular groove of the caliper body in the automobile brake assembly is inside the caliper body, and its coaxiality detection is difficult. For this reason, a simple measuring fixture was designed, which has the following two problems: ① Since the positioning part of the fixture is the core shaft positioning, there is a gap with the caliper piston hole, and the measurement results are inconsistent each time. Moreover, for the same product and the same operator, the stability of the fixture is poor, which cannot meet the batch inspection requirements on the production line, and the quality problems of the product cannot be discovered in time; ② The probe retraction adopts a spring-actuated mechanism. Because the spring has no self-locking function, it will loosen after a long time of use. When the caliper is placed in the fixture, the probe state cannot be observed and it is very easy to damage the probe, which affects the measurement accuracy.

[0003] How to solve the problem of unstable detection caused by the gap between the positioning part of the inspection fixture and the piston hole of the caliper and how to protect the rectangular groove measuring needle are important issues that need to be solved urgently in this technical field. Summary of the invention

[0004] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a brake caliper body rectangular groove coaxiality detection tool, which determines the coaxiality of the rectangular groove by detecting the wall thickness between the piston hole and the rectangular groove, thereby improving the detection accuracy and speed, and is suitable for batch detection on the production line.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a brake caliper body rectangular groove coaxiality detection tool, including a workbench, characterized in that a caliper positioning detection cylinder is provided on the workbench, a vertically arranged first connecting rod and a vertically arranged second connecting rod are arranged in the caliper positioning detection cylinder, the upper end of the first connecting rod is provided with a main detection head abutting against the inner wall of the piston hole, the lower end of the first connecting rod is connected to the slide, the middle part of the second connecting rod is rotatably connected to the middle part of the first connecting rod, the upper end of the second connecting rod is provided with an auxiliary detection head abutting against the inner wall of the rectangular groove, the lower end of the second connecting rod abuts against the input end of the micrometer, the micrometer moves with the slide, the lower part of the second connecting rod is connected to a tensioning member for making the second connecting rod close to the first connecting rod, the caliper positioning detection cylinder is provided with an outlet for the main detection head and the auxiliary detection head to extend to the outside, the first connecting rod or the slide is connected to an elastic member, and the elastic member has an elastic force that drives the first connecting rod or the slide to move so that the main detection head and the auxiliary detection head abut against the inner wall of the piston hole and the inner wall of the rectangular groove respectively.

[0006] The slide is connected to a transmission mechanism, the transmission mechanism is arranged on a side close to the second connecting rod, the dial indicator is arranged on a side close to the first connecting rod, and the transmission mechanism pushes the slide to move in the direction of the dial indicator.

[0007] The transmission mechanism comprises a locking switch handle and an eccentric rotating shaft, and the locking switch handle drives the slide to move by rotating the eccentric rotating shaft.

[0008] The transmission mechanism comprises an eccentric wheel, and the eccentric wheel rotates to drive the slide to move.

[0009] The input end of the micrometer passes through the through hole at the lower end of the first connecting rod and abuts against the lower end of the second connecting rod.

[0010] The tensioning member comprises an adjusting screw and a spring. The adjusting screw passes through a movable hole of the first connecting rod and is connected to the second connecting rod. The spring is sleeved on the adjusting screw.

[0011] The tensioning member comprises a tensioning spring and a spring fixing seat, wherein the spring fixing seat is arranged on the slide, and the tensioning spring pushes the lower part of the second connecting rod to approach the first connecting rod.

[0012] A replaceable caliper positioning end cover is arranged at the upper end of the caliper positioning detection cylinder, and the outlet is arranged on the caliper positioning end cover.

[0013] The beneficial effects of the present invention are as follows: by setting a retractable main detection head and a sub-detection head, the main detection head and the sub-detection head are used to detect the wall thickness difference between the rectangular groove of the caliper and the piston hole, which is transmitted to the micrometer through the first connecting rod and the second connecting rod, and the caliper body is rotated to observe whether the wall thickness difference floats within a certain range to determine whether the coaxiality of the rectangular groove is qualified. This detection method can quickly and accurately perform coaxiality detection on the caliper and eliminate detection errors of the inspection fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of Embodiment 1;

[0015] Figure 2 This is a structural diagram of embodiment 2. DETAILED DESCRIPTION

[0016] Embodiment 1: Figure 1 As shown, a brake caliper body rectangular groove coaxiality detection tool comprises a workbench 1, on which a caliper positioning detection cylinder 2 is provided, and a replaceable caliper positioning end cover 3 is provided on the upper end of the caliper positioning detection cylinder 2, and the caliper positioning end cover 3 is used to fix the caliper body 4 and play a positioning role. The caliper positioning end cover can be replaced according to different models of caliper bodies, and the caliper body can be rotated on the caliper positioning end cover.

[0017] The caliper positioning detection cylinder 2 is provided with a vertically arranged first connecting rod 6 and a vertically arranged second connecting rod 7. The upper end of the first connecting rod 6 is provided with a main detection head 8 that abuts against the inner wall of the piston hole 20. The piston hole can be a reference hole. The lower end of the first connecting rod 6 is connected to the slide 10, that is, the first connecting rod 6 will move with the slide 10. The middle part of the second connecting rod 7 is rotatably connected to the middle part of the first connecting rod 6. The upper end of the second connecting rod 7 is provided with a secondary detection head 9 that abuts against the inner wall of the rectangular groove 30. The lower end of the second connecting rod 7 abuts against the input end of the micrometer 11. The micrometer 1 1 follows the slide 10 to move, the lower part of the second connecting rod 7 is connected with a tensioning member 12 for making the second connecting rod 7 close to the first connecting rod 6. In this embodiment, the tensioning member includes an adjusting screw 12b and a spring 12a. The adjusting screw 12b passes through the movable hole of the first connecting rod 6 and is connected to the second connecting rod 7. The spring 12a is sleeved on the adjusting screw 12b. The spring 12a pulls the lower part of the second connecting rod 7 close to the first connecting rod 6, so that the auxiliary detection head 9 can maintain the extended state. The elastic force of the spring can be adjusted by rotating the adjusting screw, thereby adjusting the extension amount of the auxiliary detection head.

[0018] The caliper positioning detection cylinder 2 is provided with an outlet 5 for the main detection head 8 and the auxiliary detection head 9 to extend to the outside. The outlet 5 is provided on the caliper positioning end cover 3. The first connecting rod 6 is connected with an elastic member 13. The elastic member 13 has an elastic force that drives the first connecting rod 6 to move so that the main detection head 8 and the auxiliary detection head 9 are respectively in contact with the inner wall of the piston hole and the inner wall of the rectangular groove. The elastic member 13 is arranged in the caliper positioning detection cylinder 2.

[0019] The slide 10 is connected to a transmission mechanism 14 , which is disposed on a side close to the second connecting rod 7 , and the dial gauge 11 is disposed on a side close to the first connecting rod 6 . The transmission mechanism 14 pushes the slide 10 to move toward the dial gauge 11 .

[0020] In this embodiment, the transmission mechanism 14 includes a locking switch handle 14a and an eccentric shaft 14b. The rotation of the locking switch handle 14a drives the eccentric shaft 14b to rotate, thereby pushing the slide 10 to move.

[0021] The input end of the micrometer 11 passes through the through hole at the lower end of the first connecting rod 6 and abuts against the lower end of the second connecting rod 7. The main detection head and the auxiliary detection head abut against the inner wall of the piston hole and the inner wall of the rectangular groove respectively. The reading of the micrometer is observed during the rotation of the measured product to detect the coaxiality of the rectangular groove.

[0022] Embodiment 2: Figure 2As shown, a brake caliper body rectangular groove coaxiality detection tool comprises a workbench 1, on which a caliper positioning detection cylinder 2 is provided, and a replaceable caliper positioning end cover 3 is provided on the upper end of the caliper positioning detection cylinder 2, and the caliper positioning end cover 3 is used to fix the caliper body 4 and play a positioning role. The caliper positioning end cover can be replaced according to different models of caliper bodies, and the caliper body can be rotated on the caliper positioning end cover.

[0023] The caliper positioning detection cylinder 2 is provided with a first connecting rod 6 and a second connecting rod 7 which are arranged vertically. The upper end of the first connecting rod 6 is provided with a main detection head 8 which abuts against the inner wall of the piston hole. The lower end of the first connecting rod 6 is connected to the slide 10, that is, the first connecting rod 6 will move with the slide 10. The middle part of the second connecting rod 7 is rotatably connected with the middle part of the first connecting rod 6. The upper end of the second connecting rod 7 is provided with a secondary detection head 9 which abuts against the inner wall of the rectangular groove. The lower end of the second connecting rod 7 abuts against the input end of the micrometer 11. The micrometer 11 follows the movement of the slide 10. The slide 10 moves, and the lower part of the second connecting rod 7 is connected to a tensioning member 12 which makes the second connecting rod 7 close to the first connecting rod 6. In the present embodiment, the tensioning member includes a tensioning spring 12c and a spring fixing seat 12d. The spring fixing seat 12d is arranged on the slide 10. The tensioning spring 12c pushes the lower part of the second connecting rod 7 close to the first connecting rod 6, so that the auxiliary detection head can maintain an extended state and abut against the inner wall of the rectangular groove. The change in the thickness of the inner wall of the rectangular groove can be fed back to the micrometer via the auxiliary detection head and the second connecting rod, and can be seen through the micrometer.

[0024] The caliper positioning detection cylinder 2 is provided with an outlet 5 for the main detection head 8 and the auxiliary detection head 9 to extend to the outside. The outlet 5 is provided on the caliper positioning end cover 3. The slide 10 is connected with an elastic member 13. The elastic member 13 has an elastic force that pushes the slide so that the main detection head 8 and the auxiliary detection head 9 are respectively in contact with the inner wall of the piston hole and the inner wall of the rectangular groove. The elastic member 13 is arranged on the workbench 1.

[0025] The slide 10 is connected to a transmission mechanism 14 , which is disposed on a side close to the second connecting rod 7 , and the dial gauge 11 is disposed on a side close to the first connecting rod 6 . The transmission mechanism 14 pushes the slide 10 to move toward the dial gauge 11 .

[0026] In this embodiment, the transmission mechanism 14 includes an eccentric wheel 14 c, and the eccentric wheel 14 c rotates to push the slide 10 to move.

[0027] The input end of the micrometer 11 passes through the through hole at the lower end of the first connecting rod 6 and abuts against the lower end of the second connecting rod 7 .

[0028] Working principle: The transmission mechanism 14 drives the slide 10 to move, so that the main detection head 8 and the auxiliary detection head 9 are retracted, which facilitates the installation of the caliper body on the caliper positioning end cover 3. After the caliper body is installed, the transmission mechanism 14 is operated to make the slide 10 in a free sliding state. Under the elastic force of the elastic member 13, the main detection head 8 and the auxiliary detection head 9 extend out of the outlet and abut against the inner wall of the piston hole and the inner wall of the rectangular groove respectively;

[0029] The elastic force of the elastic member and the tension member makes the main detection head and the auxiliary detection head contact the caliper being tested. When the dial gauge value starts to change, turn the caliper. When the value is the largest, return the dial gauge to zero.

[0030] Rotate the caliper body and read the maximum value on the micrometer, which is the coaxiality of the rectangular groove and the piston hole.

Claims

1. A brake caliper rectangular groove coaxiality detection tool, comprising a workbench, characterized in that: The workbench is provided with a caliper positioning detection cylinder, and a vertically arranged first connecting rod and a vertically arranged second connecting rod are arranged in the caliper positioning detection cylinder. The upper end of the first connecting rod is provided with a main detection head abutting against the inner wall of the piston hole, the lower end of the first connecting rod is connected to the slide, the middle part of the second connecting rod is rotatably connected to the middle part of the first connecting rod, the upper end of the second connecting rod is provided with a secondary detection head abutting against the inner wall of the rectangular groove, the lower end of the second connecting rod abuts against the input end of the micrometer, the micrometer moves with the slide, and the lower part of the second connecting rod is connected with a tensioner that makes the second connecting rod close to the first connecting rod. The caliper positioning detection cylinder is provided with an outlet for the main detection head and the auxiliary detection head to extend to the outside, the first connecting rod or the slide is connected with an elastic member, and the elastic member has an elastic force for driving the first connecting rod or the slide to move so that the main detection head and the auxiliary detection head are respectively abutted against the inner wall of the piston hole and the inner wall of the rectangular groove, the slide is connected with a transmission mechanism, the transmission mechanism is arranged on the side close to the second connecting rod, the micrometer is arranged on the side close to the first connecting rod, the transmission mechanism pushes the slide to move in the direction of the micrometer, and the input end of the micrometer passes through the through hole at the lower end of the first connecting rod and abuts against the lower end of the second connecting rod; The transmission mechanism drives the slide to move, so that the main detection head and the auxiliary detection head are retracted, so that the caliper body is conveniently installed on the caliper positioning end cover. After the caliper body is installed, the transmission mechanism is operated to make the slide in a free sliding state. Under the elastic force of the elastic member, the main detection head and the auxiliary detection head extend out of the outlet and abut against the inner wall of the piston hole and the inner wall of the rectangular groove respectively. The elastic force of the elastic part and the tensioning part makes the main detection head and the auxiliary detection head contact the caliper being tested. When the micrometer value begins to change, turn the caliper. When the value is the largest, return the micrometer to zero; rotate the caliper body and read the maximum value of the micrometer, which is the coaxiality of the rectangular groove and the piston hole.

2. A brake caliper rectangular groove coaxiality detection tool according to claim 1, characterized in that: The transmission mechanism comprises a locking switch handle and an eccentric rotating shaft, and the locking switch handle drives the slide to move by rotating the eccentric rotating shaft.

3. A brake caliper rectangular groove coaxiality detection tool according to claim 1, characterized in that: The transmission mechanism comprises an eccentric wheel, and the eccentric wheel rotates to drive the slide to move.

4. A brake caliper rectangular groove coaxiality detection tool according to claim 1, characterized in that: The tensioning member comprises an adjusting screw and a spring. The adjusting screw passes through a movable hole of the first connecting rod and is connected to the second connecting rod. The spring is sleeved on the adjusting screw.

5. A brake caliper rectangular groove coaxiality detection tool according to claim 1, characterized in that: The tensioning member comprises a tensioning spring and a spring fixing seat, wherein the spring fixing seat is arranged on the slide, and the tensioning spring pushes the lower part of the second connecting rod to approach the first connecting rod.

6. A brake caliper rectangular groove coaxiality detection tool according to claim 1, characterized in that: A replaceable caliper positioning end cover is arranged at the upper end of the caliper positioning detection cylinder, and the outlet is arranged on the caliper positioning end cover.

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