Coaxiality measuring gauge
By designing a coaxiality measuring fixture that includes a dial indicator, bracket, measuring body, and probe, the problem of the inability to quantitatively evaluate the coaxiality of the exhaust hole of the caliper body of an automotive disc brake in the existing technology is solved, and simple and accurate measurement results are achieved.
Patent Information
- Application Number
- CN202422976973.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-04
AI Technical Summary
Existing technologies cannot quantitatively evaluate the coaxiality of the exhaust port and the bottom hole of a car disc brake caliper, and the measurement results are greatly affected by human factors and the operation is cumbersome.
Design a coaxiality measuring fixture, including a dial indicator, a bracket, a fixture body, a spring, and a probe. The coaxiality deviation is measured by directly reading the dial indicator through the axial sliding and rotation of the probe to respond to the change in the height of the contact point.
It enables quantitative measurement of the coaxiality of exhaust holes, eliminates the influence of human torque differences on measurement results, and simplifies the operation process.
Smart Images
Figure CN223500328U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive brake technology, and in particular to a coaxiality measuring tool. Background Technology
[0002] The coaxiality of the vent hole thread and the bottom hole of a disc brake caliper is crucial for the product's sealing performance. Current methods for checking coaxiality involve applying color to the vent screw, hand-screwing it into the vent hole thread until it's fully threaded, then unscrewing it and visually inspecting the contact area of the indentation. This method lacks a quantitative evaluation method, varies from person to person, and depends on the screwing torque; applying color is also cumbersome. Utility Model Content
[0003] To address the technical problems mentioned above, a brake caliper exhaust hole coaxiality measuring tool with small error and easy operation is proposed.
[0004] The technical solution provided by this utility model is as follows: a coaxiality measuring gauge, including a dial indicator, a bracket, a gauge body, a spring, and a probe. The first end of the bracket is fixedly connected to the dial indicator, and the second end is fixedly connected to the gauge body. The gauge body has a central hole along the axial direction. The first end of the probe passes through the central hole of the gauge body and abuts against the dial indicator. A rotating part is fixedly connected between the gauge body and the first end. The probe can slide and rotate axially through the central hole of the gauge body. The second end of the probe, which passes through the central hole of the gauge body, is fitted with a spring. The second end of the probe is inverted triangular in shape.
[0005] As described above, a coaxiality measuring fixture has threads on it, which can be screwed into the threaded hole of the workpiece to be measured to fix the measuring fixture.
[0006] As described above, a coaxiality measuring fixture also has a groove for a positioning spring.
[0007] As described above, in a coaxiality measuring fixture, the rotating part has an anti-slip layer, which allows for easier twisting of the rotating part and the probe connected to the rotating part during use.
[0008] Compared with the prior art, the present invention has the following beneficial effects:
[0009] 1. This utility model provides a novel coaxiality gauge for the exhaust port of a disc brake caliper body. The height change of the contact point is reflected by the axial sliding of the probe, and the coaxiality deviation is directly reflected on the probe of the dial indicator by the rotation of the probe.
[0010] 2. The structure of this utility model eliminates the influence of different screwing torques on the measurement results.
[0011] 3. The structure of this utility model allows for direct reading and measurement, and can quantitatively reflect the size of the coaxiality of the exhaust port. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the measuring gauge of this utility model.
[0013] Figure 2 This is a schematic diagram of the component to be tested. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0015] like Figure 1 As shown, a coaxiality measuring fixture is characterized in that it includes a dial indicator 1, a bracket 2, a fixture 3, a spring 4, and a probe 5. The first end of the bracket 2 is fixedly connected to the dial indicator 1, and the second end is fixedly connected to the fixture 3. The fixture 3 has a central hole along the axial direction. The first end of the probe 5 passing through the central hole of the fixture 3 abuts against the dial indicator 1, and a rotating part 6 is fixedly connected between the fixture 3 and the first end. The probe 5 can slide and rotate axially through the central hole of the fixture 3. The second end of the probe 5 passing through the central hole of the fixture 3 is fitted with the spring 4. The second end of the probe 5 is inverted triangular in shape.
[0016] As described above, a coaxiality measuring fixture has threads on the fixture body 3.
[0017] As described above, the coaxiality measuring fixture 3 also has a groove for a positioning spring 4.
[0018] As described above, in a coaxiality measuring fixture, the rotating part 6 has an anti-slip layer.
[0019] like Figure 2 As shown, the component to be tested has holes 10 and 20. When in use, the test body 3 of this utility model is inserted into hole 10. At this time, the probe 5 is located in hole 20. After the fixation is completed, the rotating part 6 on the probe 5 is rotated. The height of the inverted triangular inclined surface of the probe 5 and the contact point with the workpiece are different, and the probe floats up and down axially under the action of the spring 4, causing the probe of the dial indicator 1 to fluctuate up and down, thereby measuring the actual coaxiality error.
[0020] While the specific embodiments of this utility model have been described above, they are not intended to limit the scope of protection of this utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of this utility model are still within the scope of protection of this utility model.
Claims
1. A coaxiality measuring fixture, characterized in that, It includes a dial indicator (1), a bracket (2), a test piece (3), a spring (4), and a probe (5). The bracket (2) has a dial indicator (1) fixedly connected to its first end and a test piece (3) fixedly connected to its second end. The test piece (3) has a central hole along the axial direction. The probe (5) passes through the first end of the central hole of the test piece (3) and abuts against the dial indicator (1). A rotating part (6) is fixedly connected between the test piece (3) and the first end. The probe (5) can slide and rotate axially through the central hole of the test piece (3). The probe (5) passes through the hole in the test piece (3) and is fitted with a spring (4). The second end of the probe (5) is inverted triangular in shape.
2. The coaxiality measuring fixture as described in claim 1, characterized in that, The inspection device (3) has threads.
3. The coaxiality measuring fixture as described in claim 1, characterized in that, The inspection device (3) has a groove for a positioning spring (4).
4. The coaxiality measuring fixture as described in claim 1, characterized in that, The rotating part (6) has an anti-slip layer.