A size checking fixture for a limiting block

Abstract

This utility model discloses a limit block size inspection tool, including a tool body. The tool body contains a first detection cavity and a second detection cavity. The first detection cavity contains a positioning post and a detection surface. The second detection cavity contains a first positioning surface, a second positioning surface, and an extra-long detection section. An identification component is installed within the tool body. This component identifies the limiting end face of the limit block, and the positioning post, the first positioning surface, and the second positioning surface are used to position the limit block. This utility model, by setting a positioning post, a positioning surface, and a detection surface on the tool body, achieves rapid identification of whether the limit block size is qualified, greatly improving inspection efficiency. By setting an extra-long detection section and an identification component, the limiting end face of the limit block is inspected separately to ensure the limit block passes inspection. The identification component uses a contact piece and a sensor in combination, enabling reliable and rapid inspection.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment, and in particular to a limit block size gauge. Background Technology

[0002] In current production processes, valve limit blocks play a crucial role in controlling valve opening and ensuring the valve operates within a specified range. These parts are characterized by their small size, relatively low precision requirements, and large quantity demanded. Therefore, they are often produced through mass casting, eliminating the need for machining. However, this method introduces a problem: casting inevitably leads to part deformation, and given the large quantity, inspection personnel cannot measure each part individually, relying instead on sampling. This results in some defective products entering the assembly process, causing improper installation or preventing installation altogether, thus delaying production.

[0003] like Figure 1 As shown, the structure of the limiting block is such that, due to installation and limiting requirements, the relative positional relationship between the positioning groove, the mounting hole and the limiting end face needs to be detected. However, in conventional testing, calipers are used for detection, which results in a high error rate and slow testing speed. Utility Model Content

[0004] To address the shortcomings of the existing technology, the main objective of this utility model is to overcome these deficiencies and disclose a limit block size gauge, comprising a gauge body, a first detection cavity and a second detection cavity within the gauge body, a positioning post and a detection surface within the first detection cavity, and a first positioning surface, a second positioning surface and an extra-long detection section within the second detection cavity, and an identification component within the gauge body. The identification component is used to identify the limiting end face of the limit block, and the positioning post, the first positioning surface and the second positioning surface are used to position the limit block.

[0005] Furthermore, the end of the positioning post is chamfered.

[0006] Furthermore, the identification component includes a bracket, a contact piece, a spring, and a sensor. A mounting shaft is provided on the bracket, the contact piece is rotatably connected to the mounting shaft, the spring connects the contact piece and the bracket, and the spring provides a restoring force to the contact piece. The sensor is mounted on the bracket. During detection, when the contact piece rotates and moves to the sensor, the sensor emits an identification signal.

[0007] Furthermore, the sensor is a proximity switch.

[0008] Furthermore, the spring is a tension spring.

[0009] Furthermore, clearance grooves are provided at both ends of the detection surface.

[0010] The beneficial effects achieved by this utility model are as follows:

[0011] This invention improves inspection efficiency by setting positioning posts, positioning planes, and detection planes on the fixture body to quickly identify whether the dimensional accuracy of the limit block is acceptable. An extra-long detection section and an identification component are used to inspect the limiting end face of the limit block separately, ensuring the limit block passes inspection. The identification component uses a combination of contact plates and sensors for reliable and rapid detection. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the limiting block.

[0013] Figure 2 This is a three-dimensional structural diagram of a limit block size gauge according to the present invention;

[0014] Figure 3 A schematic diagram of the component structure for identification;

[0015] Figure 4 This is a schematic diagram of the fit between a limit block size gauge and a limit block according to the present invention;

[0016] The attached figures are labeled as follows:

[0017] 1. Inspection fixture body; 2. Identification component; 11. First detection chamber; 12. Second detection chamber; 111. Positioning post; 112. Detection surface; 113. Clearance groove; 121. First positioning surface; 122. Second positioning surface; 123. Extra-long detection section; 21. Bracket; 22. Contact piece; 23. Spring; 24. Sensor. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] A limit block size gauge, such as Figures 1-4 As shown, the fixture includes a fixture body 1, which contains a first detection cavity 11 and a second detection cavity 12. The first detection cavity 11 contains a positioning post 111 and a detection surface 112. The positioning post 111 engages with the mounting hole of the limiting block, and the detection surface 112 engages with the positioning groove. By engaging the positioning post 111 and the detection surface 112, the relative position of the mounting hole and the positioning groove can be detected. At the same time, it is only necessary to observe whether the detection surface 112 engages with the positioning groove to detect the shape of the positioning groove.

[0020] The second detection cavity 12 is provided with a first positioning surface 121, a second positioning surface 122, and an extra-long detection part 123. The fixture body 1 is provided with an identification component 2, which is used to identify the limiting end face of the limiting block. The first positioning surface 121 and the second positioning surface 122 cooperate with the inner sidewall of the limiting block to achieve overall positioning of the limiting block. After the first positioning surface 121 and the second positioning surface 122 are engaged, the extra-long detection part 123 and the identification component 2 detect the limiting end face of the limiting block to determine whether the position of the limiting end face is within the specified range. The extra-long detection part 123 is an arc surface that protrudes beyond the first positioning surface 121 and the second positioning surface 122. If the limiting block is too long, the extra-long detection part 123 will prevent the limiting block from being accurately installed.

[0021] Through the above structure, such as Figures 1-4 As shown, simply placing the limit block inside the gauge allows for a quick determination of whether the limit block's dimensions meet the requirements.

[0022] In one embodiment, such as Figures 1-4 As shown, the end of the positioning post 111 is chamfered to facilitate assembly of the positioning post 111 with the mounting hole of the limiting block.

[0023] In one embodiment, such as Figures 1-4 As shown, the identification component 2 includes a bracket 21, a contact piece 22, a spring 23, and a sensor 24. A mounting shaft is mounted on the bracket 21, and the contact piece 22 is rotatably connected to the mounting shaft. The spring 23 connects the contact piece 22 and the bracket 21, providing a restoring force to the contact piece 22. The sensor 24 is mounted on the bracket 21. The identification component 2 is used to detect when the positioning end face is too short. That is, when the positioning end face is too short, the signal from the identification component 2 cannot be triggered. If the limit block is qualified, the limit block will contact the contact piece 22, thereby driving the contact piece 22 to rotate around the mounting shaft, causing the contact piece 22 to move towards the sensor 24. The sensor 24 sends an identification signal to the detection device, which can emit a prompt sound and / or light to indicate that the ultra-shortness detection is qualified.

[0024] In the above embodiments, such as Figures 1-4 As shown, sensor 24 is a proximity switch.

[0025] In the above embodiments, such as Figures 1-4 As shown, spring 23 is a tension spring. Compared to a compression spring, there is no need to set a guiding structure for the spring, simplifying the structure of the identification component 2.

[0026] In one embodiment, such as Figures 1-4 As shown, clearance grooves 113 are provided at both ends of the detection surface 112 to prevent non-detection areas from affecting the detection results.

[0027] When using this utility model, such as Figures 1-4As shown, simply place the limiting block into the fixture, and then place the limiting end face into the second detection cavity 12, ensuring the limiting block mates with the first positioning surface 121 and the second positioning surface 122. Align the mounting hole with the positioning post 111, and visually observe whether the detection surface 112 and the positioning groove of the limiting block fit together. Furthermore, if the limiting block can be inserted into the second detection cavity 12 and fits against the first and second positioning surfaces 121 and 122, it indicates that the limiting block is qualified for overlength testing. If the identification component 2 generates a signal, it indicates that the underlength testing is qualified. Therefore, with the above structure, simply inserting the limiting block into the fixture is sufficient to quickly determine whether the dimensions of the limiting block are qualified, greatly improving testing efficiency.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof shall be covered within the protection scope of the claims of the present utility model.

Claims

1. A size checking fixture for a stopper, characterized by, The fixture includes a fixture body, which contains a first detection cavity and a second detection cavity. The first detection cavity contains a positioning post and a detection surface, and the second detection cavity contains a first positioning surface, a second positioning surface, and an extra-long detection part. The fixture body contains an identification component, which is used to identify the limiting end face of the limiting block, and the positioning post, the first positioning surface, and the second positioning surface are used to position the limiting block.

2. The size inspection tool of claim 1, wherein, The end of the positioning post is chamfered.

3. The size checking fixture of claim 1, wherein, The identification component includes a bracket, a contact piece, a spring, and a sensor. A mounting shaft is provided on the bracket, and the contact piece is rotatably connected to the mounting shaft. The spring connects the contact piece and the bracket, and provides a restoring force to the contact piece. The sensor is mounted on the bracket. During detection, when the contact piece rotates and moves to the sensor, the sensor emits an identification signal.

4. The size checking fixture of claim 3, wherein, The sensor is a proximity switch.

5. The size checking fixture of claim 3, wherein, The spring is a tension spring.

6. The size inspection tool of claim 1, wherein, The detection surface is provided with clearance grooves at both ends.

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