Novel pitch detection core rod
By using a novel pitch detection mandrel with an integrated structure and employing limiting and avoidance groove designs, the problems of accuracy and flexibility in chain plate hole position detection are solved, achieving efficient and accurate detection results.
Patent Information
- Application Number
- CN202422711779.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-07
AI Technical Summary
Existing hole position measuring tools are difficult to guarantee accuracy and flexibility when detecting the position of chain plate holes, resulting in large measurement errors and low efficiency.
A new type of pitch detection mandrel with an integrated structure forms a measuring step with the measuring column through a limiting connection column. Combined with a tool relief groove and a clearance groove, it ensures the coaxiality of the hole position of the part to be measured with the mandrel, thereby improving the detection accuracy and ease of operation.
It improves the accuracy and ease of operation of chain plate hole position detection, reduces fitting errors caused by small space, and enhances the flexibility and efficiency of measurement.
Smart Images
Figure CN223500293U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chain component production and testing technology, and in particular to a novel pitch detection mandrel. Background Technology
[0002] Chain plates are an important structural component of chains. When detecting the hole positions of chain plates, it is difficult to guarantee the accuracy of the hole center position when using existing hole position measuring tools. The placement flexibility during measurement is also relatively poor, resulting in large measurement errors and relatively low overall measurement efficiency. Utility Model Content
[0003] The purpose of this invention is to provide a novel pitch detection mandrel. It features an integrated structure, where two detection mandrels are fitted together with the chain plate to be tested, ensuring coaxiality between the hole in the part being measured and the mandrel. During measurement, a measuring step is formed between the limiting connecting post and the measuring post, allowing the measuring head of a general-purpose measuring tool to rest on the measuring connecting post, improving both convenience and accuracy. By providing relief grooves on the limiting structure and the measuring position, measurement accuracy is prevented from being affected by fit errors caused by limited space between the mandrel and the fitting structure. Furthermore, the fitting position is equipped with a clearance groove, providing more space for fitment and facilitating easier assembly operations.
[0004] The technical solution of this utility model is as follows:
[0005] A novel pitch detection mandrel, characterized in that: it includes a cylindrical main measuring column with its central axis pointing vertically upwards; each of the main measuring column has an integrally formed cylindrical limiting and fitting connecting column on its upper and lower sides, the cylindrical connecting column having a size larger than the diameter of the main measuring column; a main fitting connecting column with the same central axis is located at the center of the outer end face of the limiting and fitting connecting column; a cylindrical guide fitting column with the same central axis is located at the center of the outer end face of the main fitting connecting column; each of the limiting and fitting connecting columns has a cylindrical retraction groove with the same central axis and a size smaller than the diameter of the main measuring column on its upper and lower sides; the diameter of the retraction groove closer to the main fitting connecting column is smaller than the diameter of the retraction groove closer to the main measuring column; symmetrical avoidance fitting safety grooves are provided on the front and rear sides of the limiting and fitting connecting column, the main fitting connecting column, and the guide fitting column, the inner side of which is a vertical plane.
[0006] Furthermore, the diameter of the main measuring column is an integer multiple of 5.
[0007] Furthermore, a conical guide mating connecting post is provided on the outer side of the guide mating post.
[0008] The beneficial effects of this utility model are:
[0009] This utility model adopts an integrated structure. During use, by engaging two detection mandrels with the chain plate to be tested, the coaxiality between the hole of the part to be measured and the mandrels can be ensured. During measurement, the limiting engagement connecting post forms a measuring step with the measuring post. During testing, the measuring head of the general measuring tool can rest on the measuring engagement connecting post, which can improve the convenience and accuracy of testing. By setting the relief groove on the limiting structure and the measuring position, the fit error caused by the small space between the fit and the fit structure can be avoided, which affects the measurement accuracy. The fit position is provided with a clearance groove, which can make the fit space larger and the combination operation more convenient. Attached Figure Description
[0010] Figure 1 This is a front view of the present invention;
[0011] Figure 2 This is a side view of the present invention;
[0012] Figure 3 This is a top view of the present invention;
[0013] Figure 4 This is a schematic diagram showing the present invention in use when it is combined with the component to be measured;
[0014] In the diagram: 1. Main measuring column, 2. Limiting and connecting column, 3. Main body connecting column, 4. Guide column, 5. Retracting tool groove, 6. Alternating safety groove, 7. Measuring head. Detailed Implementation
[0015] like Figures 1 to 4As shown, a novel pitch detection mandrel includes a cylindrical main measuring column 1 with its central axis pointing vertically upwards; this serves as the measuring section during measurement. On the upper and lower sides of the main measuring column 1, there is an integrally formed cylindrical limiting and mating connecting column 2, with a size larger than the diameter of the main measuring column 1; these serve as limiting sections during mating. At the center of the outer end face of the limiting and mating connecting column 2, there is a main mating connecting column 3 with the same central axis; this position is the meshing section when mating with the part to be measured. At the center of the outer end face of the main mating connecting column 3, there is a cylindrical guide mating column 4 with the same central axis; this serves as a guide section during initial mating. The difference between the diameter of the measuring section and the diameter of the limiting section forms a measuring limiting step, allowing the measuring head of a general-purpose measuring tool to rest on the measuring limiting step during testing, improving the convenience and accuracy of testing. The limiting and connecting post 2 has a cylindrical retraction groove 5 on its upper and lower sides, with the same central axis and a size smaller than the diameter of the main measuring post 1. The diameter of the retraction groove 5 closer to the main measuring post 3 is smaller than the diameter of the retraction groove 5 closer to the main measuring post 1. This avoids the reduction in coaxiality between the mandrel and the hole of the measured part and the formation of measurement errors caused by the non-clear angle transition between the meshing section and the limiting section, and between the limiting section and the measuring section. The limiting and connecting post 2, the main measuring post 3, and the guide connecting post 4 have symmetrical avoidance and safety grooves 6 on their front and rear sides. The inner side of the avoidance and safety groove 6 is a vertical plane, which provides more space on the outer side during mating, making the mating operation more convenient and the structure occupying less space. It adopts an integrated structure. During use, by engaging two detection mandrels with the chain plate to be tested, the coaxiality between the hole of the part to be measured and the mandrel is ensured. During measurement, the limiting engagement connecting post forms a measuring step with the measuring post. During testing, the measuring head of the general measuring tool can rest on the measuring engagement connecting post, which improves the convenience and accuracy of testing. By setting the relief groove on the limiting structure and the measuring position, the fit error caused by the small space between the fit and the fit structure can be avoided, which affects the measurement accuracy. The fit position is equipped with a clearance groove, which allows for more space during fit and makes the combination operation more convenient.
[0016] Preferably, the diameter of the main measuring column 1 is an integer multiple of 5, which facilitates detection and value acquisition, and makes calculations during measurement more convenient.
[0017] Preferably, the outer side of the guide mating post 4 is provided with a conical guide mating connecting post, which makes assembly more convenient and has the function of mating guidance, thereby improving the mating efficiency during assembly.
[0018] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements or substitutions can be made without departing from the principle of this utility model, and these improvements or substitutions should also be considered within the protection scope of this utility model.
Claims
1. A novel pitch detection mandrel, characterized in that: The system includes a cylindrical main measuring column (1) with its central axis pointing vertically upwards. On the upper and lower sides of the main measuring column (1), there is an integrally formed cylindrical limiting and fitting connecting column (2) with a size larger than the diameter of the main measuring column (1). At the center of the outer end face of the limiting and fitting connecting column (2), there is a main fitting connecting column (3) with the same central axis. At the center of the outer end face of the main fitting connecting column (3), there is a cylindrical guide fitting column (4) with the same central axis. The upper part of the limiting and fitting connecting column (2)... On each of the lower sides, there is a cylindrical tool retraction groove (5) with the same central axis and a size smaller than the diameter of the main measuring column (1). The diameter of the tool retraction groove (5) near the main body connecting column (3) is smaller than the diameter of the tool retraction groove (5) on the side near the main body measuring column (1). The front and rear sides of the limiting connecting column (2), the main body connecting column (3) and the guide connecting column (4) are provided with symmetrical avoidance safety grooves (6). The inner side of the avoidance safety groove (6) is a vertical plane.
2. The novel pitch detection mandrel according to claim 1, characterized in that: The diameter of the main measuring column (1) is an integer multiple of 5.
3. The novel pitch detection mandrel according to claim 1, characterized in that: The outer side of the guide mating post (4) is provided with a conical guide mating connecting post.