Rapid detection tool for detecting coaxiality of piston
By designing a testing fixture that includes a base plate platform, a V-shaped positioning block, a positioning baffle, a positioning pin, and a dial indicator, the problem of inaccurate piston coaxiality measurement was solved, enabling rapid and efficient testing of piston coaxiality and meeting accuracy requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LESHAN MASCH TECH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-17
AI Technical Summary
Existing technologies for inspecting automotive parts are inefficient, especially in measuring piston coaxiality, which is not precise enough to meet increasingly stringent accuracy requirements.
A rapid inspection fixture was designed, comprising a base plate platform, a V-shaped positioning block, a positioning baffle, a positioning pin, a dial indicator sleeve, and a dial indicator. The piston is centered and positioned by the V-shaped positioning block and the positioning pin. The outer circle of the piston is measured by the dial indicator, and the coaxiality is measured by rotating the piston one revolution to observe the value.
It enables rapid and high-precision detection of piston coaxiality, improves detection efficiency and accuracy, and meets increasingly stringent coaxiality requirements.
Smart Images

Figure CN224136546U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts testing, specifically to a rapid testing fixture for piston coaxiality. Background Technology
[0002] Automotive parts are the various units that make up the overall automotive parts processing and the products that serve automotive parts processing. After automotive parts are manufactured, they need to be inspected. As the requirements for product coaxiality become increasingly stringent, it is necessary to measure the accuracy of product coaxiality. This inspection fixture has a simple structure, is easy to use, and greatly improves inspection efficiency. Utility Model Content
[0003] To address the problems existing in the prior art, this utility model provides a rapid detection fixture for piston coaxiality.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A rapid testing fixture for detecting piston coaxiality includes a base platform 1, a V-shaped positioning block 2, a positioning baffle 3, a positioning pin 4, a dial indicator sleeve 5, and a dial indicator 6; wherein: the V-shaped positioning block 2 is installed on the top of the base platform 1, and the dial indicator sleeve 5 is respectively fitted onto both ends of the V-shaped positioning block 2, and the dial indicator 6 is installed in the dial indicator sleeve 5; the positioning baffle 3 is installed on the rear side of the V-shaped positioning block 2; the positioning pin 4 is placed in the middle of the V-shaped positioning block 2, and the rear end of the positioning pin 4 rests on the positioning baffle 3.
[0006] This utility model also has the following additional technical features:
[0007] As a further specific optimization of the technical solution of this utility model: a V-shaped positioning block 2 is installed on the top of the base plate platform 1 by bolts.
[0008] As a further specific optimization of the technical solution of this utility model: a positioning baffle 3 is installed on the rear side of the V-shaped positioning block 2 by bolts.
[0009] As a further specific optimization of the technical solution of this utility model: the front end of the positioning pin 4 is provided with a product piston 7.
[0010] Compared with the prior art, the advantages of this utility model are:
[0011] This utility model is used for piston products. The piston 7 is centered and positioned by the V-shaped positioning block 2 and the positioning pin 4. During measurement, the dial indicator 6 measures the outer circle of the piston 7. By rotating the piston 7 one revolution and observing the value of the dial indicator 6, the coaxiality of the piston 7 can be measured. Attached Figure Description
[0012] Figure 1This is a schematic diagram of the exploded structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the installation structure of this utility model.
[0014] Explanation of reference numerals in the attached drawings: 1. Base plate platform; 2. V-shaped positioning block; 3. Positioning baffle; 4. Positioning pin; 5. Dial gauge sleeve; 6. Product piston; 7. Detailed Implementation
[0015] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.
[0016] A rapid testing fixture for piston coaxiality includes a base platform 1, a V-shaped positioning block 2, a positioning baffle 3, a positioning pin 4, a dial indicator sleeve 5, and a dial indicator 6. The positioning pin 4 is used for centering and fixing, and the dial indicator 6 is used for high-precision testing. By observing the change in the value of the dial indicator 6, it is possible to determine whether the coaxiality of the product piston 7 meets the requirements.
[0017] A V-shaped positioning block 2 is bolted to the top of the base platform 1.
[0018] The two ends of the V-shaped positioning block 2 are respectively fitted with dial indicator sleeves 5, and dial indicator sleeves 5 are installed with dial indicators 6.
[0019] A positioning baffle 3 is bolted to the rear side of the V-shaped positioning block 2. A positioning pin 4 is placed in the middle of the V-shaped positioning block 2, and the rear end of the positioning pin 4 rests on the positioning baffle 3.
[0020] The product piston 7 is placed at the front end of the positioning pin 4.
[0021] This invention uses a V-shaped positioning block 2 and a positioning pin 4 to center and position the product piston 7. During measurement, a dial indicator 6 measures the outer circle of the product piston 7. By rotating the product piston 7 one revolution and observing the value of the dial indicator 6, the coaxiality of the product piston 7 can be measured.
[0022] The above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.
Claims
1. A rapid testing fixture for detecting piston coaxiality, characterized in that: It includes a base plate platform (1), a V-shaped positioning block (2), a positioning baffle (3), a positioning pin (4), a dial indicator sleeve (5), and a dial indicator (6); wherein: a V-shaped positioning block (2) is installed on the top of the base plate platform (1), and dial indicator sleeves (5) are respectively fitted on both ends of the V-shaped positioning block (2), and a dial indicator (6) is installed in the dial indicator sleeves (5); a positioning baffle (3) is installed on the rear side of the V-shaped positioning block (2); a positioning pin (4) is placed in the middle of the V-shaped positioning block (2), and the rear end of the positioning pin (4) rests on the positioning baffle (3).
2. The quick detection tool for detecting coaxiality of a piston according to claim 1, characterized in that: A V-shaped positioning block (2) is bolted to the top of the base platform (1).
3. The quick detection tool for detecting coaxiality of a piston according to claim 1, characterized in that: A positioning baffle (3) is bolted to the rear side of the V-shaped positioning block (2).
4. The rapid detection fixture for piston coaxiality according to claim 1, characterized in that: The product piston (7) is placed at the front end of the positioning pin (4).