Measuring tool for measuring position of cam timing gear
By designing a measuring tool and matching it with a micrometer to accurately measure the position of the cam timing gear, the problem of measuring the accuracy of the cam timing gear position on the micro aircraft engine is solved, ensuring the correctness of the installation.
Patent Information
- Application Number
- CN202422482189.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-10-14
AI Technical Summary
Existing technology makes it difficult to accurately measure the position of the cam timing gear on a micro air vehicle engine, resulting in an inability to ensure correct alignment with other parts during installation.
A measuring tool was designed, including a V-block, a gear pair, a bracket and a base plate. It was used in conjunction with a micrometer to accurately measure the highest point of the cam through the corresponding relationship between the gear pair and the cam gear to determine the timing position of the timing gear.
It can accurately measure the highest point of the cam, ensuring the correct installation of the timing gear and other parts. It is easy to operate and the measurement is accurate.
Smart Images
Figure CN223460952U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of process tooling, and particularly relates to a measuring tool for measuring the position of a cam timing gear. BACKGROUND
[0002] Engine timing refers to the best timing point of exhaust, fuel injection and ignition, so the cam and the crankshaft timing gear connected by a belt or a chain on the engine must have timing marks to ensure that the marks on the cylinder head, the cylinder or the chain are aligned during installation. The timing position of the timing gear of the cam on a certain micro air vehicle engine must correspond to the highest point of the cam, so before installation, the highest point of the cam must be accurately measured to determine the timing position of the timing gear and mark it. To solve these problems, the utility model provides a cam timing measuring tool for accurately determining the position of the cam timing gear. SUMMARY
[0003] The utility model discloses a kind of measuring tools for measuring the position of cam timing gear, the tool can be used with dial gauge, accurately measure the highest point of cam to determine the timing position of timing gear, ensure the correctness when installing with other parts.
[0004] The technical scheme adopted by the utility model is as follows:
[0005] A kind of measuring tool for measuring the position of cam timing gear, including V block, gear pair rod, support and bottom plate, V block, support are installed on bottom plate, gear pair rod is inserted into the upper hole of support.
[0006] Further, the V block is installed on the bottom plate by screws and pins.
[0007] Further, the support is installed on the bottom plate by screws and pins.
[0008] Further, the gear pair rod is gap fit with the support.
[0009] Further, the rod end of the gear pair rod is processed with the gear corresponding to the gear of cam.
[0010] Further, the measuring tool is used with dial gauge, and the dial head of dial gauge is placed on the cam surface of cam.
[0011] Further, the dial gauge is a general standard dial gauge.
[0012] The operation method of the above measuring tool is as follows:
[0013] After the V-shaped block is roughly processed, it is installed on the base plate by screws and pins, and then is finely processed to ensure that the symmetry and straightness of the V-shaped surface are less than or equal to 0.01 mm; the bracket is installed on the base plate by screws and pins, the gear pair rod is inserted into the upper hole of the bracket, and the gear pair rod and the bracket are slowly slid up and down by the aid of the small gap, and the rod end of the gear pair rod is processed with a gear corresponding to the gear of the cam.
[0014] During measurement, the gear pair rod is lifted, the cam is placed on the V-shaped block (as shown in Figure 2 ), the dial head of the micrometer is placed on the cam surface of the cam, the cam is slowly rotated, the highest point of the cam is found through the reading of the micrometer, then the gear pair rod is inserted into the gear in the middle of the cam, the corresponding gear pair rod is the timing position of the cam gear, a mark is made, the gear pair rod is lifted, and the cam is removed, and the measurement is completed.
[0015] The beneficial effects of the utility model lie in:
[0016] The utility model has the advantages of simple structure, cooperation with the micrometer, accurate measurement of the highest point of the cam to determine the timing position of the timing gear, guarantee of the correctness during installation with other parts, simple operation, and accurate measurement. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a front view structure of the utility model;
[0018] Figure 2 It is a left view structure of the utility model;
[0019] Figure 3 It is a top view of the utility model;
[0020] Figure 4 It is an engineering drawing of the bracket;
[0021] Figure 5 It is an engineering drawing of the gear pair rod;
[0022] In the drawing, 1, V-shaped block, 2, gear pair rod, 3, bracket, 4, base plate, 5, cam, 6, general standard micrometer. DETAILED DESCRIPTION
[0023] The utility model will be further described in detail in combination with the drawings, but the present application is not limited to this.
[0024] As shown in Figure 1 and Figure 2 , the measuring tool of the utility model comprises a V-shaped block 1, a gear pair rod 2, a bracket 3 and a base plate 4, the V-shaped block 1 and the bracket 3 are installed on the base plate 4 by screws and pins, the gear pair rod 2 is inserted into the upper hole of the bracket 3, and the rod end of the gear pair rod 3 is processed with a gear corresponding to the gear of the cam 5.
[0025] The operation method of the above measuring tool is as follows:
[0026] After the rough machining of the V-shaped block 1, it is installed on the base plate 4 by screws and pins, and then the symmetry and straightness of the V-shaped surface are ensured to be less than or equal to 0.01 mm through finishing machining; the support 3 is installed on the base plate 4 by screws and pins, the gear pair rod 2 is inserted into the hole above the support 3, and the two are in small gap cooperation and can be slowly slid up and down by force, and the end of the gear pair rod 2 is machined with a gear corresponding to the gear of the cam 5.
[0027] During measurement, the gear pair rod 2 is lifted, and then the cam 5 is placed on the V-shaped block 1, the head of the universal standard micrometer 6 is placed on the cam surface of the cam 5, the cam 5 is slowly rotated, the highest point of the cam 5 is found through the reading of the universal standard micrometer 6, then the gear pair rod 2 is inserted into the gear in the middle of the cam 5, and the corresponding gear pair rod 2 is the timing position of the cam gear, a mark is made, the gear pair rod 2 is lifted, and the cam 5 is removed, and the measurement is completed. Figure 2 During measurement, the gear pair rod 2 is lifted, and then the cam 5 is placed on the V-shaped block 1, the head of the universal standard micrometer 6 is placed on the cam surface of the cam 5, the cam 5 is slowly rotated, the highest point of the cam 5 is found through the reading of the universal standard micrometer 6, then the gear pair rod 2 is inserted into the gear in the middle of the cam 5, and the corresponding gear pair rod 2 is the timing position of the cam gear, a mark is made, the gear pair rod 2 is lifted, and the cam 5 is removed, and the measurement is completed.
Claims
1. A gauge for measuring the position of a cam timing gear, characterized by, It comprises V-shaped blocks, gear pairs, supports and a bottom plate, the V-shaped blocks and the supports are installed on the bottom plate, the gear pairs are inserted into the upper holes of the supports, the V-shaped blocks are installed on the bottom plate through screws and pins, the supports are installed on the bottom plate through screws and pins, the gear pairs are in clearance fit with the supports, and the rod ends of the gear pairs are processed with gear teeth corresponding to the gear teeth of the cam.
2. The gage for measuring cam timing gear position of claim 1, wherein, The symmetry and straightness of the V-shaped surface of the V-shaped block are less than or equal to 0.01 mm.
3. The gage for measuring cam timing gear position of claim 1, wherein, The measuring tool can be used in cooperation with a dial gauge.
4. The gage for measuring cam timing gear position of claim 3, wherein, The dial gauge is a general standard dial gauge.