一种测量线性关键尺寸的检具
By designing a fixture that combines a reference pin, a reference block, and a flexible screw, the instability problem in the inspection of critical dimensions of brake pads was solved, achieving high-precision and repeatable quantitative measurement, providing accurate dimensional deviation data, and supporting brake pad quality control and process optimization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN JINLI HIGH TECH CO LTD
- Filing Date
- 2025-10-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to perform high-precision, repeatable quantitative testing of the key dimensions of brake pads, especially due to the irregular shape of brake pads and the lack of reliable reference positioning methods, which leads to unstable measurement results and poor repeatability.
A gauge for measuring linear critical dimensions is designed, including a reference pin, a reference block, a dial indicator, and a flexible screw. The brake pad is stably pressed between the reference pin and the reference block by the combination of the reference pin and the reference block, and the adjustable elastic preload of the flexible screw ensures that the brake pad is stably pressed between the reference pin and the reference block. Multiple accurate positioning references are provided, and numerical readings are obtained by dial indicator.
It achieves high repeatability and high precision measurement of key dimensions of brake pads, can provide specific dimensional deviations, supports process adjustment and mold compensation, and improves the stability and accuracy of inspection.
Smart Images
Figure CN224517601U_ABST
Abstract
Claims
1. A gauge for measuring a linear critical dimension, the gauge comprising: include: Reference pin (1), which is used to mate with the square hole on the brake pad; Reference block (2), which is used to restrict at least one rotational degree of freedom of the brake pad with reference pin (1) as the center of rotation; dial indicator (3); Calibration block (4), which is used to calibrate dial gauge (3).
2. The gauge of claim 1, wherein, It also includes a resilient screw (5), which is used to press the brake pad to make the brake pad contact the reference pin (1) and the reference block (2).
3. The gauge of claim 2, wherein, The elastic screw (5) includes a housing (51), a pin (52), and an adjustment mechanism (53). The pin (52) moves through the housing (51), and the adjustment mechanism (53) is used to adjust the elastic force of the pin (52).
4. The gauge of claim 2, wherein, There exists an elastic screw (5) whose pressing direction is vertically downward and whose pressing force passes through the reference pin (1).
5. The gauge of claim 2, wherein, There exists an elastic screw (5) whose compression direction is horizontal and whose compression force passes through the reference pin (1).
6. The gauge of claim 2, wherein, There exists an elastic screw (5) whose pressing direction is horizontal and whose pressing force passes through the reference block (2).
7. The gauge of claim 1 wherein, The reference pin (1) contacts the top sidewall of the square hole to form a first reference point (11), and the reference pin (1) contacts a horizontal sidewall of the square hole to form a second reference point (12).
8. The gauge of claim 1, wherein, It also includes a back plate (6), on which the reference pin (1), reference block (2) and calibration block (4) are disposed, and on which a mounting base (61) is disposed to cooperate with the dial indicator (3).
9. The gauge of claim 8, wherein, The correction block (4) is movably connected to the back plate (6), and the back plate (6) is recessed inward to form a receiving groove (62) for accommodating the correction block (4).
10. The gauge of claim 8, wherein, The back plate (6) is recessed inward to form a relief groove (63), which extends to the edge of the back plate (6).