Detection device for the inner hole of the pressure plate
By designing a detection device for the detection substrate and detection pin, the problems of complex operation and high cost of the coordinate measuring machine were solved, and simplified detection and accurate judgment of the inner hole of the pressure plate were realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BERGSTROM (CHANGZHOU) AIR CONDITIONING SYST CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-07-31
AI Technical Summary
In the existing technology, the operation of using a coordinate measuring machine to inspect the inner hole of the pressure plate is complicated and costly, which makes it inconvenient for widespread application.
A detection device including a detection substrate and multiple columnar detection pins is designed. The detection pins correspond one-to-one with the inner holes and are used for detection through clearance fit. When the detection substrate is attached to the pressure plate, the detection pins are inserted into the inner holes to determine whether the inner holes meet the requirements.
It simplifies the inspection process of the inner hole of the pressure plate, reduces testing costs, improves inspection accuracy and efficiency, and is easy to operate.
Smart Images
Figure CN224580819U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of parts inspection technology, and in particular to a device for inspecting the inner hole of a pressure plate. Background Technology
[0002] In air conditioning systems, pressure plates are frequently used to press expansion valves onto pipe flanges to ensure a seal. Some pressure plates have multiple internal holes running through the two opposing surfaces of the plate. These holes include a connecting hole located in the center of the pressure plate, and connecting holes located on either side of the connecting hole for pipe passage. In practical use, to ensure even pressure application, the centers of the connecting hole and the two connecting holes must be aligned on a straight line. Furthermore, to ensure smooth pipe passage through the pressure plate, the inner diameter of the connecting hole must meet the specifications outlined in the drawings. Therefore, to ensure the pressure plate meets practical requirements, the position and diameter of the connecting hole and the two connecting holes within the pressure plate need to be inspected.
[0003] In related technologies, coordinate measuring machines (CMMs) are commonly used to inspect pressure plates. The CMM method refers to using a CMM to perform high-precision measurements of the geometric dimensions, shape, and positional tolerances of each hole in the pressure plate.
[0004] However, coordinate measuring machines (CMMs) require highly skilled operators, are very expensive, and the inspection process using CMMs is relatively complex, making them unsuitable for widespread application. Utility Model Content
[0005] This disclosure provides a device for detecting the inner hole of a pressure plate, which simplifies the detection process and reduces testing costs. The technical solution is as follows:
[0006] This disclosure provides a device for detecting the inner holes of a pressure plate. The device is used to detect multiple inner holes of the pressure plate. The device includes a detection base plate and multiple columnar detection pins. One side of the detection base plate has a detection plane for contacting the surface of the pressure plate. The multiple detection pins are spaced apart on the detection plane. One end of each detection pin is connected to the detection plane. The centerline of each detection pin is perpendicular to the detection plane, and the centerlines of the multiple detection pins are located in the same plane. The multiple detection pins are arranged in a one-to-one correspondence with the multiple inner holes. The outer diameter of each detection pin is clearance-fitted with the theoretical inner diameter of the corresponding inner hole. The distance between two adjacent detection pins is the same as the theoretical distance between two adjacent inner holes.
[0007] In another implementation of this disclosure, the height of the detection pin protruding outside the detection plane is not less than the thickness of the pressure plate.
[0008] In another implementation of this disclosure, the detection device further includes a limiting pin located on one side of the plane containing the center lines of the plurality of detection pins. The center line of the limiting pin is perpendicular to the detection plane, and one end of the limiting pin is connected to the detection plane. The distance between the limiting pin and the plane containing the center lines of the plurality of detection pins is the distance from the center of the inner hole to one side of the pressure plate.
[0009] In another implementation of this disclosure, the detection device includes a plurality of the limiting pins, the center lines of the plurality of limiting pins being located in the same plane.
[0010] In another implementation of this disclosure, the height of the limiting pin is not lower than the height of the detection pin.
[0011] In another implementation of this disclosure, the plurality of limiting pins, the detection substrate, and the plurality of detection pins are all aluminum structural components.
[0012] In another implementation of this disclosure, the detection substrate is a square plate with chamfered corners at all four corners.
[0013] In another implementation of this disclosure, the detection pin includes an insertion segment and a detection segment connected in sequence. The insertion segment is located in and connected to the detection substrate, and the detection segment is located outside the detection plane. The outer diameter of the detection segment is larger than the outer diameter of the insertion segment.
[0014] In another implementation of this disclosure, the detection pin further includes a guide section located at the end of the detection section away from the insertion section and connected to the detection section, wherein the outer diameter of the guide section gradually decreases along the direction from the insertion section to the detection section.
[0015] In another implementation of this disclosure, the detection pin is an integral structural component.
[0016] The beneficial effects of the technical solutions provided in this disclosure are:
[0017] When the detection device provided in this embodiment detects the inner hole of the pressure plate, since the detection device includes a detection substrate and detection pins, and the detection substrate has a detection plane, the detection substrate can be brought into contact with the surface of the pressure plate during detection. Simultaneously, since the detection pins are spaced apart on the detection plane and their center lines are on the same plane, multiple detection pins are arranged one-to-one with multiple inner holes, and the distance between two adjacent detection pins is the same as the theoretical distance between two adjacent inner holes, when the detection substrate is brought into contact with the surface of the pressure plate, the detection pins can be inserted into the corresponding inner holes. If the detection pins can be smoothly inserted into the corresponding inner holes and have a clearance fit with the corresponding inner holes, it indicates that the inner hole of the pressure plate meets the actual requirements. Conversely, if the detection pins cannot be smoothly inserted into the corresponding inner holes, it indicates that the positional relationship of the inner holes of the pressure plate does not meet the actual requirements. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of a pressure plate containing an internal hole.
[0020] Figure 2 This is a schematic diagram of the device for detecting the inner hole of the pressure plate;
[0021] Figure 3 for Figure 2 A cross-sectional view along the AA direction.
[0022] The symbols in the diagram represent the following meanings:
[0023] 100. Pressure plate; 101. Inner hole;
[0024] 1. Detection substrate; 10. Detection plane;
[0025] 2. Detection pin; 21. Insertion section; 22. Detection section; 23. Guide section;
[0026] 3. Limit pin. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.
[0028] In air conditioning systems, pressure plates 100 are often used to press-fit expansion valves and other components onto housings or outer casings containing piping.
[0029] Figure 1 This is a schematic diagram of a pressure plate containing an internal hole, as shown below. Figure 1 As shown, the pressure plate 100 has three inner holes 101. The centers of the three inner holes 101 are located on the same straight line, and the center distance between them is fixed. The inner hole 101 in the middle is used for inserting screws. The inner holes 101 on both sides are used for pipes to pass through. Moreover, the reason why the inner holes 101 on both sides are designed as holes with openings is to facilitate the passage of pipes.
[0030] This disclosure provides a device for detecting the inner hole of a pressure plate, such as... Figure 2 As shown, the detection device is used to detect multiple inner holes of the pressure plate. The detection device includes a detection base plate 1 and multiple columnar detection pins 2.
[0031] The detection substrate 1 has a detection plane 10 on one side for bonding with the plate surface of the pressure plate. A plurality of detection pins 2 are spaced apart on the detection plane 10. One end of each detection pin 2 is connected to the detection plane 10. The center line of each detection pin 2 is perpendicular to the detection plane, and the center lines of the plurality of detection pins 2 are located on the same plane.
[0032] Multiple detection pins 2 are arranged in a one-to-one correspondence with multiple inner holes. The outer diameter of each detection pin 2 is in clearance fit with the theoretical inner diameter of the corresponding inner hole. The distance between two adjacent detection pins 2 is the same as the theoretical distance between two adjacent inner holes.
[0033] When the detection device provided in this embodiment detects the inner hole of the pressure plate, since the detection device includes a detection substrate 1 and detection pins 2, and the detection substrate 1 has a detection plane 10, the detection substrate 1 can be made to fit against the surface of the pressure plate through the detection plane 10 during detection. Simultaneously, since the detection pins 2 are spaced apart on the detection plane 10 and their center lines are on the same plane, multiple detection pins 2 are arranged one-to-one with multiple inner holes, and the distance between two adjacent detection pins 2 is the same as the theoretical distance between two adjacent inner holes, when the detection substrate 1 is fitted against the surface of the pressure plate, the detection pins 2 can be inserted into the corresponding inner holes. If the detection pin 2 can be smoothly inserted into the corresponding inner hole and has a clearance fit with the corresponding inner hole, it indicates that the inner hole of the pressure plate meets the actual requirements. Conversely, if the detection pin 2 cannot be smoothly inserted into the corresponding inner hole, it indicates that the positional relationship of the inner hole of the pressure plate does not meet the actual requirements.
[0034] Optionally, the height of each detection pin 2 protruding outside the detection plane 10 is not less than the thickness of the pressure plate.
[0035] In the above implementation, by making the height of the detection pin 2 protruding outside the detection plane 10 greater than or equal to the thickness of the pressure plate, the detection pin 2 can protrude outside the corresponding inner hole when it is inserted into the inner hole, ensuring that the inner hole can match the corresponding detection pin 2 in height, thereby improving the detection accuracy of the inner hole in the axial direction during detection.
[0036] Optionally, the detection device also includes a limiting pin 3, which is located on one side of the plane containing the center lines of the plurality of detection pins 2. The center line of the limiting pin 3 is perpendicular to the detection plane 10, and one end is connected to the detection plane 10. The distance between the limiting pin 3 and the plane containing the center lines of the plurality of detection pins 2 is the distance from the center of the inner hole to one side of the pressure plate.
[0037] In the above implementation, the setting of the limiting pin 3 can limit one side of the pressure plate in the width direction when the pressure plate is attached to the detection substrate 1, so as to ensure that the pressure plate can be attached to the detection substrate 1 smoothly.
[0038] Optionally, the detection device includes multiple limit pins 3, the center lines of the multiple limit pins 3 being located on the same plane.
[0039] In the above implementation, the arrangement of multiple limiting pins 3 can further improve the detection efficiency of the detection substrate 1.
[0040] For example, the limiting pin 3 is also a columnar structure, and the height of the limiting pin 3 is not lower than the height of the detection pin 2. This can improve the positioning effect of the pressure plate.
[0041] Optionally, the multiple limit pins 3, the detection base plate 1, and the multiple detection pins 2 are all aluminum structural components.
[0042] In the above implementation, by setting all the above structural components as aluminum structural components, the detection device can be made lighter, and the aluminum structural components can automatically form an oxide film on their surface to protect the detection device, prevent rust, and extend its service life.
[0043] Optionally, the detection substrate 1 is a square plate with chamfered corners at all four corners.
[0044] In the above implementation, sharp edges in the structural components can cause local stress concentration, which can easily become crack initiation points, leading to structural fatigue or fracture. Therefore, the four corners of the detection substrate 1 are chamfered. By chamfering them into rounded corners or bevels, the stress distribution can be smoothly transitioned, significantly reducing stress peaks.
[0045] In addition, if the four corners of the detection substrate 1 are not chamfered, the sharp corners of the detection substrate 1 may scratch the operator or damage other components.
[0046] Figure 3for Figure 2 A cross-sectional view along the AA direction, combined with Figure 3 Optionally, the detection pin 2 includes an insertion section 21 and a detection section 22 connected in sequence. The insertion section 21 is located in the detection substrate 1 and connected to the detection substrate 1. The detection section 22 is located outside the detection plane 10, and the outer diameter of the detection section 22 is larger than the outer diameter of the insertion section 21.
[0047] In the above implementation, the insertion segment 21 is used to be inserted into the detection substrate 1, and the detection segment 22 is used to be inserted into the corresponding inner hole so as to detect the position of the inner hole, etc.
[0048] Alternatively, the detection pin 2 may also include a guide section 23, which is located at the end of the detection section 22 away from the insertion section 21 and is connected to the detection section 22. The outer diameter of the guide section 23 gradually decreases along the direction from the insertion section 21 to the detection section 22.
[0049] In the above implementation, the guide segment 23 gradually increases the contact area between the detection pin 2 and the inner hole through its conical surface, making it easier to slide in than the edge of a cylinder, thus facilitating insertion. Furthermore, once the detection pin 2 is inserted into the corresponding inner hole, the guide segment 23 allows for rapid alignment with the inner hole.
[0050] For example, the detection pin 2 is a single structural component. This further improves the manufacturing efficiency of the detection pin 2 and simplifies the manufacturing process.
[0051] In other examples, the multiple limiting pins 3, the detection substrate 1, and the multiple detection pins 2 can also be integrated into a single structural component. This can further improve the manufacturing efficiency of the detection device and simplify the manufacturing process.
[0052] The working process of the detection device provided in this embodiment is briefly described below:
[0053] During testing, the testing substrate 1 is placed on the platform, and the pressure plate is moved so that the over-test plane 10 of the testing substrate 1 can fit against the pressure plate, and at the same time, the testing pin 2 can be inserted into the corresponding inner hole.
[0054] If the detection pin can be smoothly inserted into the corresponding inner hole and has a clearance fit with it, it indicates that the inner hole of the pressure plate meets the actual requirements. Conversely, if the detection pin 2 cannot be smoothly inserted into the corresponding inner hole, it indicates that the positional relationship of the inner hole of the pressure plate does not meet the actual requirements.
[0055] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.
Claims
1. A device for detecting the bore of a press plate, characterized in that, The detection device is used to detect multiple inner holes of the pressure plate. The detection device includes a detection base plate (1) and multiple columnar detection pins (2). One side of the detection base plate (1) has a detection plane (10) for contacting the plate surface of the pressure plate. The multiple detection pins (2) are spaced apart on the detection plane (10). One end of each detection pin (2) is connected to the detection plane (10). The center line of each detection pin (2) is perpendicular to the detection plane, and the center lines of the multiple detection pins (2) are located in the same plane. The plurality of detection pins (2) are arranged in a one-to-one correspondence with the plurality of inner holes. The outer diameter of each detection pin (2) is in clearance fit with the theoretical inner diameter of the corresponding inner hole. The distance between two adjacent detection pins (2) is the same as the theoretical distance between two adjacent inner holes.
2. The detection device of claim 1, wherein, The height of the detection pin (2) protruding outside the detection plane (10) is not less than the thickness of the pressure plate.
3. The detection device of claim 1, wherein, The detection device further includes a limiting pin (3), which is located on one side of the plane containing the center lines of the plurality of detection pins (2). The center line of the limiting pin (3) is perpendicular to the detection plane (10), and one end is connected to the detection plane (10). The distance between the limiting pin (3) and the plane containing the center lines of the plurality of detection pins (2) is the distance from the center of the inner hole to one side of the pressure plate.
4. The detection device of claim 3, wherein, The detection device includes a plurality of limiting pins (3), and the center lines of the plurality of limiting pins (3) are located on the same plane.
5. The detection device of claim 4, wherein, The height of the limiting pin (3) is not lower than the height of the detection pin (2).
6. The detection device of claim 4, wherein, The plurality of limiting pins (3), the detection substrate (1), and the plurality of detection pins (2) are all aluminum structural components.
7. The detection device according to any one of claims 1 to 6, characterized in that, The detection substrate (1) is a square plate with chamfered corners at its four corners.
8. The detection device according to any one of claims 1 to 6, characterized in that The detection pin (2) includes an insertion section (21) and a detection section (22) connected in sequence. The insertion section (21) is located in the detection substrate (1) and connected to the detection substrate (1). The detection section (22) is located outside the detection plane (10). The outer diameter of the detection section (22) is larger than the outer diameter of the insertion section (21).
9. The detection device of claim 8, wherein, The detection pin (2) further includes a guide section (23), which is located at the end of the detection section (22) away from the insertion section (21) and is connected to the detection section (22). The outer diameter of the guide section (23) gradually decreases along the direction from the insertion section (21) to the detection section (22).
10. The detection device of claim 8, wherein, The detection pin (2) is an integral structural component.