A spherical pin assembly size testing fixture

Abstract

This utility model provides a gauge for measuring the dimensions of a spherical pin assembly, used to inspect the critical dimensions of the spherical pin assembly. The gauge includes a base, an end cap distance gauge, and two protruding pins. The two protruding pins are symmetrically placed along the vertical center line of the end cap distance gauge. The distance between the centers of the two protruding pins matches the hole spacing L2 of a standard spherical pin assembly, and the length of the end cap distance gauge matches the end cap distance L1 of the standard spherical pin assembly. By designing the gauge, this application allows for the simultaneous inspection of the end cap distance L1, hole spacing L2, end cap distance L1, and the symmetry L3 of the two positioning holes, eliminating the need for multiple measuring tools and improving inspection efficiency. The fact that the two positioning holes can simultaneously fit around the outer periphery of the protruding pins indicates good symmetry between the end cap and the two positioning holes. Then, it is only necessary to determine whether the critical dimensions of the spherical pin assembly match the corresponding dimensions of the gauge.

Description

Technical Field

[0001] This utility model relates to the field of spherical pin assembly inspection, and more specifically, to a gauge for the dimensions of spherical pin assemblies. Background Technology

[0002] The spherical pin assembly has three key dimensions. The first is the end cap distance L1 between the two end caps. The spherical pin assembly is installed into the housing, and the rubber is compressed through the end cap distance L1 to improve rigidity and durability. The second is the hole spacing L2 between the positioning holes on both sides of the spherical pin assembly. The hole spacing L2 connects the spherical pin assembly to the vehicle body. The third is the symmetry L3 between the end cap distance and the two positioning holes. The symmetry ensures that the middle ball joint is centered when the spherical pin assembly is connected to the vehicle body.

[0003] The end cap distance L1 is currently measured using calipers. This method is inefficient and covers a small area, which can easily lead to some parts being missed. If non-compliant parts are shipped out, it can cause excessive or insufficient assembly force, affecting the performance of the spherical pin assembly and causing customer complaints.

[0004] The hole spacing L2 on both sides of the spherical pin assembly is currently inspected by random sampling using a projector or coordinate measuring machine. This inspection method is inefficient. As the hole spacing is a key dimension for connection with the vehicle body, random sampling cannot represent that the outgoing parts are 100% qualified, and there is a risk of customer complaints.

[0005] The symmetry L3 between the end cap distance and the two positioning holes is currently inspected by a coordinate measuring machine. This inspection method is inefficient and cannot cover 100% of every product, which poses a risk of customer complaints. Utility Model Content

[0006] In view of this, the present invention aims to propose a gauge for the dimensions of a spherical pin assembly, which can simultaneously detect the end cap distance L1, the hole distance L2, the end cap distance, and the symmetry L3 of the two positioning holes 12, in order to solve the problem of low detection efficiency and the need for multiple detection tools in the prior art.

[0007] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0008] A gauge for measuring the dimensions of a spherical pin assembly is disclosed. This gauge is used to inspect the critical dimensions of the spherical pin assembly. The gauge includes a base, an end cap distance gauge, and two protruding pins. The end cap distance gauge and the two protruding pins are all mounted on the base. The two protruding pins are symmetrically positioned along the vertical center line of the end cap distance gauge. The distance between the centers of the two protruding pins matches the hole spacing L2 of a standard spherical pin assembly. The length of the end cap distance gauge matches the end cap distance L1 of the standard spherical pin assembly. This application, by designing a gauge for measuring the dimensions of a spherical pin assembly, allows for the simultaneous and integrated inspection of the end cap distance L1, hole spacing L2, and the symmetry L3 of the two positioning holes. This eliminates the need for multiple other measuring tools, improving inspection efficiency and preventing the outflow of defective products. Since the critical dimensions of the inspection fixture and the standard spherical pin assembly match, and the two protruding pins are symmetrically placed along the vertical center line of the end cap from the inspection gauge, when the spherical pin assembly to be tested is placed on the inspection fixture, the two locating holes can simultaneously fit around the outer periphery of the protruding pins, indicating that the end cap and the two locating holes have good symmetry. Then, it is only necessary to determine whether the critical dimensions of the spherical pin assembly to be tested match the length of the end cap from the inspection gauge and the distance between the centers of the two protruding pins. If they match, it indicates that the critical dimensions of the spherical pin assembly to be tested are qualified, and the spherical pin assembly to be tested meets the requirements.

[0009] Furthermore, the center of the end cap distance gauge and the protruding pin are located on the same horizontal line. This ensures that when the spherical pin assembly is placed on the gauge, the center of the spherical pin can be better positioned within the end cap distance gauge, while the positioning hole is fitted onto the outside of the protruding pin.

[0010] Furthermore, the spherical pin assembly includes a central part of the spherical pin and pin shafts disposed on both sides of the central part of the spherical pin. Each end of the two pin shafts is provided with a positioning hole. The two positioning holes are symmetrically disposed on the left and right sides of the central part of the spherical pin. An elastic body is sleeved on the outer side of the central part of the spherical pin. The axial left and right end faces of the elastic body are connected to end caps. The spherical pin assembly has three key dimensions, including the end cap distance L1 between the two end caps, the hole distance L2 between the two positioning holes, the end cap distance L1, and the symmetry L3 of the two positioning holes.

[0011] Furthermore, the length of the end cap from the inspection gauge is 57.5 ± 0.40 - 0.20 mm, the distance between the centers of the two protruding pins is L2 = 130 ± 0.20 mm, and the symmetry between the end cap from the inspection gauge and the two protruding pins is ≡ 0.5A. The relevant dimensions of the inspection tool are the same as the key dimensions of the standard spherical pin assembly, which facilitates the operator to quickly inspect and accurately determine whether the spherical pin assembly to be inspected meets the requirements.

[0012] Furthermore, the spherical pin has a cylindrical center, and the positioning hole is circular. Correspondingly, the end cap is recessed along the side facing the base to form a receiving cavity. At least part of the end cap and the elastomer are placed in the receiving cavity. This not only accommodates and places the end cap, which is beneficial to the accuracy of the inspection tool, but also positions the spherical pin assembly to prevent the end cap from shaking and affecting the inspection. The protruding pin is cylindrical, which facilitates the positioning hole to be fitted onto the outer periphery of the protruding pin, thereby determining whether the hole distance L2 and symmetry L3 are qualified.

[0013] Furthermore, the connection between the elastomer and the end cap is stepped, and the left and right sides of the receiving cavity are respectively connected to abutment surfaces, which are arc-shaped. The end cap is placed on the upper side of the abutment surface, and at least a portion of the elastomer is located within the receiving cavity. The arc-shaped abutment surface can better fit the end cap, increasing the contact area between the gauge and the end cap. Moreover, the abutment surface can provide stable support for the end cap, preventing the spherical pin assembly from shaking or failing to maintain a straight state during testing, thereby affecting the accuracy of the test.

[0014] Furthermore, the protruding pin includes a guide and a support member from top to bottom. One side of the support member is connected to the base, and the other side is connected to the guide member. The connection between the support member and the guide member is the bearing surface. The diameter of the guide member is the same as the diameter of the positioning hole, and the diameter of the support member is larger than the diameter of the positioning hole. When the spherical pin assembly to be tested is placed on the fixture, the guide member can guide the pin, making it easy for the positioning hole to be fitted onto the outside of the guide member and abut against the upper side of the bearing surface. The bearing surface can stably support the pin shaft, keeping the spherical pin assembly in a straight state and avoiding tilting that would affect the accuracy of the test.

[0015] Furthermore, the height of the support member is higher than the distance between the end cap and the inspection gauge, to ensure that the pin and positioning hole can abut against the upper side of the support surface.

[0016] Furthermore, the guide member has a chamfer on the side facing away from the support member. This facilitates the smooth insertion of the positioning hole into the outer side of the protruding pin and also makes it easier to observe whether the symmetry L3 is up to standard.

[0017] Furthermore, the base is equipped with multiple height-adjustable feet at its bottom, and a handle is provided on the outer perimeter of the base. The height of the base can be adjusted by screwing on the feet to keep it level, enabling accurate testing even when the instrument is placed on uneven ground. The handle facilitates the operator's handling of the instrument.

[0018] Compared with the prior art, the gauge for measuring the dimensions of the spherical pin assembly described in this utility model has the following advantages:

[0019] (1) By determining the size and position of the end cap distance gauge and protruding pin, the end cap distance L1, hole distance L2, end cap distance and the symmetry of the two positioning holes L3 can be detected simultaneously, which improves the detection efficiency and prevents defective products from flowing out. It can replace calipers, projectors and coordinate measuring machines, with high detection efficiency and good detection accuracy, thus improving customer satisfaction.

[0020] (2) When the spherical pin assembly is placed on the inspection fixture, it can maintain a straight position, reduce shaking, and improve the accuracy of inspection.

[0021] (3) In order to ensure that the entire area of ​​the end cap is covered and detected, after one side of the end cap is detected, the spherical pin assembly is rotated 180° to detect the other side. Attached Figure Description

[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0023] Figure 1 This is a schematic diagram of the mating state when the inspection tool described in this utility model is used to inspect the spherical pin assembly;

[0024] Figure 2 This is a schematic diagram of the structure of the inspection tool described in this utility model;

[0025] Figure 3 This is a cross-sectional view of the spherical pin assembly described in this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Spherical pin assembly; 11. End cap; 12. Locating hole; 13. Elastomer;

[0028] 2. Base;

[0029] 3. End cap distance inspection gauge; 31. Receiving cavity; 32. Abutment surface

[0030] 4. Protruding pin; 41. Guide component; 42. Load-bearing component;

[0031] 5. Support legs; 6. Handles. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. In addition, the orientations involved in the following specific embodiments are briefly explained: the directions or positional relationships indicated by "front," "rear," "up," "down," "left," "right," "top," and "bottom" mentioned in the embodiments refer to the orientations or positional relationships shown in the accompanying drawings. The term "on..." means directly or indirectly supported by the... element.

[0033] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] like Figures 1-2 As shown, a gauge for measuring the dimensions of a spherical pin assembly is provided for inspecting the critical dimensions of the spherical pin assembly 1. The gauge includes a base 2, an end cap distance gauge 3, and two protruding pins 4. The end cap distance gauge 3 and the two protruding pins 4 are all mounted on the base 2. The two protruding pins 4 are symmetrically placed along the vertical center line of the end cap distance gauge 3. The distance between the centers of the two protruding pins 4 matches the hole spacing L2 of the standard spherical pin assembly 1. The length of the end cap distance gauge 3 matches the end cap distance L1 of the standard spherical pin assembly 1. The vertical center line described in this application is located at... Figure 1 In the front-back direction.

[0035] like Figure 1 and Figure 3 As shown, the spherical pin assembly 1 includes a central part of the spherical pin and pin shafts disposed on both sides of the central part of the spherical pin. Each end of the two pin shafts is provided with a positioning hole 12, which are symmetrically arranged on the left and right sides of the central part of the spherical pin. An elastic body 13 is sleeved on the outer side of the central part of the spherical pin, and the axial left and right end faces of the elastic body 13 are connected to end caps 11. The spherical pin assembly 1 has three key dimensions: first, the end cap distance L1 between the two end caps 11; second, the hole distance L2 between the two positioning holes 12; and third, the symmetry L3 between the end cap distance L1 and the two positioning holes 12.

[0036] This application utilizes a gauge designed to measure the dimensions of the spherical pin assembly. By placing the spherical pin assembly 1 to be tested on the gauge, it enables simultaneous measurement of the end cap distance L1, hole distance L2, and the symmetry L3 of the two positioning holes 12, eliminating the need for multiple other measuring tools, thus improving testing efficiency and preventing defective products from being exported. Specifically, the end cap 11 is placed on the end cap distance gauge 3, and the positioning holes 12 are fitted around the outer periphery of the protruding pin 4.

[0037] Since the critical dimensions of the inspection fixture and the standard spherical pin assembly 1 match, and the two protruding pins 4 are symmetrically placed along the vertical center line of the end cap from the gauge 3, when the spherical pin assembly 1 to be tested is placed on the inspection fixture, the two positioning holes 12 can simultaneously fit around the outer periphery of the protruding pins 4, indicating that the end cap 11 and the two positioning holes 12 have good symmetry. Then, it is only necessary to determine whether the critical dimensions of the spherical pin assembly 1 to be tested match the length dimension of the end cap from the gauge 3 and the distance between the centers of the two protruding pins 4. If they match, it indicates that the critical dimensions of the spherical pin assembly 1 to be tested are qualified, and the spherical pin assembly 1 to be tested meets the requirements.

[0038] The end cap 11 and the pin are coaxially arranged. Therefore, to ensure that the center of the spherical pin can be better positioned within the end cap distance gauge 3 when the spherical pin assembly 1 is placed on the gauge, and the positioning hole 12 is fitted onto the outside of the protruding pin 4, the center of the end cap distance gauge 3 and the center of the protruding pin 4 are located on the same horizontal line. The horizontal line mentioned in this application is located at... Figure 1 Left and right directions.

[0039] As a specific example of this application, under normal circumstances, the end cap distance L1 of the standard spherical pin assembly 1 is 57.5 + 0.40 - 0.20 mm, the hole distance L2 is 130 ± 0.20 mm, and the symmetry between the end cap distance L1 and the two positioning holes 12 is L3 = ≡ 0.5A. To more accurately detect whether the critical dimensions of the spherical pin assembly 1 under test meet the requirements, the length of the end cap distance from the gauge 3 is 57.5 + 0.40 - 0.20 mm, the distance between the centers of the two protruding pins 4 is L2 = 130 ± 0.20 mm, and the symmetry between the end cap distance from the gauge 3 and the two protruding pins 4 is ≡ 0.5A. The relevant dimensions of the inspection fixture are the same as the critical dimensions of the standard spherical pin assembly 1, facilitating the operator to quickly inspect and accurately determine whether the spherical pin assembly 1 under test meets the requirements.

[0040] For the spherical pin assembly 1, the middle part of the spherical pin is cylindrical, and the positioning hole 12 is circular. Correspondingly, the end cap is recessed along the side facing the base 2 to form a receiving cavity 31. At least part of the end cap 11 and the elastomer 13 are placed in the receiving cavity 31. This not only accommodates and places the end cap 11, which is beneficial to the accuracy of the inspection, but also positions the spherical pin assembly 1 to prevent the end cap 11 from shaking and affecting the inspection. The protruding pin 4 is cylindrical, which makes it easy for the positioning hole 12 to be fitted onto the outer periphery of the protruding pin 4, thereby determining whether the hole distance L2 and symmetry L3 are qualified.

[0041] The center-to-center distance of the two protruding pins 4 mentioned in this application refers to the distance between the lines connecting the centers of the two protruding pins 4.

[0042] The connection between the elastomer 13 and the end cap 11 is stepped. As a preferred example of this application, the left and right sides of the receiving cavity 31 are respectively connected to abutment surfaces 32, which are arc-shaped. The end cap 11 is placed on the upper side of the abutment surface 32, and at least a portion of the elastomer 13 is located within the receiving cavity 31. The arc-shaped abutment surface 32 better fits the end cap 11, increasing the contact area between the gauge and the end cap 11. Furthermore, the abutment surface 32 provides stable support for the end cap 11, preventing the spherical pin assembly 1 from shaking or becoming difficult to keep flat during testing, thus affecting testing accuracy.

[0043] Accordingly, the length dimension of the end cap from the inspection gauge 3 refers to the horizontal distance between the outer edges of the contact surfaces 32 on both sides.

[0044] As a preferred example of this application, the protruding pin 4 includes, from top to bottom, a guide member 41 and a support member 42. One side of the support member 42 is connected to the base 2, and the other side is connected to the guide member 41. The connection between the support member 42 and the guide member 41 is a bearing surface. The diameter of the guide member 41 is the same as the diameter of the positioning hole 12, and the diameter of the support member 42 is larger than the diameter of the positioning hole 12. When the spherical pin assembly 1 to be tested is placed on the fixture, the guide member 41 can play a guiding role, making it easy for the positioning hole 12 to be fitted onto the outside of the guide member 41 and abut against the upper side of the bearing surface. The bearing surface can stably support the pin shaft, keeping the spherical pin assembly 1 in a straight state and avoiding tilting that would affect the accuracy of the test.

[0045] Therefore, in order to provide stable support for the bearing surface and maintain the horizontal state of the spherical pin assembly 1, the height of the bearing member 42 must be higher than the distance between the end cap and the gauge 3, so as to ensure that the pin and the positioning hole 12 can abut against the upper side of the bearing surface. The height mentioned in this application refers to the vertical direction in the figure.

[0046] The guide member 41 has a chamfer on the side opposite to the support member 42, which facilitates the smooth insertion of the positioning hole 12 into the outside of the protruding pin 4 and also makes it easy to observe whether the symmetry L3 is qualified.

[0047] The base 2 has multiple height-adjustable feet 5 at its bottom, and a handle 6 on its outer periphery. The height of the base 2 can be adjusted by rotating the feet 5 to keep it level, enabling accurate testing even when the instrument is placed on uneven ground. The handle 6 facilitates the operator's handling of the instrument.

[0048] In use, the inspection fixture of this application places the end cap 11 and the elastomer 13 on the end cap distance gauge 3. The end cap 11 abuts against the upper side of the contact surface 32, and at least a portion of the elastomer 13 is located within the receiving cavity 31. The positioning hole 12 is fitted around the protruding pin 4, and the lower side of the positioning hole 12 abuts against the upper side of the bearing surface. The critical dimensions of the spherical pin assembly 1 under test are judged by observing and judging whether each component of the spherical pin assembly 1 under test can be placed in the inspection fixture, and whether the critical dimensions match the corresponding dimensions of the inspection fixture after placement. To ensure that the entire area of ​​the end cap 11 is covered and inspected, after one side of the end cap 11 is inspected, the spherical pin assembly 1 is rotated 180° to inspect the other side. Only when all components can be placed in the inspection fixture and the critical dimensions match the corresponding dimensions of the inspection fixture after placement is the spherical pin assembly 1 under test considered qualified.

[0049] This application discloses a spherical pin assembly dimensional inspection fixture. By defining the dimensions and positions of the end cap distance gauge 3 and the protruding pin 4, it can simultaneously inspect the end cap distance L1, hole distance L2, and the symmetry L3 of the two positioning holes 12, improving inspection efficiency and preventing defective products from leaving the site. It can replace calipers, projectors, and coordinate measuring machines, offering high inspection efficiency and accuracy, thus improving customer satisfaction.

[0050] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A gauge for measuring the dimensions of a spherical pin assembly, used to inspect the critical dimensions of a spherical pin assembly (1), characterized in that, The inspection tool includes a base (2), an end cap distance gauge (3), and two protruding pins (4). The end cap distance gauge (3) and the two protruding pins (4) are both set on the base (2). The two protruding pins (4) are placed symmetrically on the left and right along the vertical center line of the end cap distance gauge (3). The distance between the center lines of the two protruding pins (4) matches the hole spacing L2 of the standard spherical pin assembly (1). The length of the end cap distance gauge (3) matches the end cap distance L1 of the standard spherical pin assembly (1).

2. The inspection fixture according to claim 1, characterized in that, The center of the end cap distance gauge (3) and the protruding pin (4) are on the same horizontal line.

3. The inspection fixture according to claim 1, characterized in that, The spherical pin assembly (1) includes a spherical pin middle section and pin shafts disposed on both sides of the spherical pin middle section. The ends of the two pin shafts are respectively provided with a positioning hole (12). The two positioning holes (12) are symmetrically disposed on the left and right sides of the spherical pin middle section. An elastic body (13) is sleeved on the outer side of the spherical pin middle section. The axial left and right end faces of the elastic body (13) are connected to end caps (11). The spherical pin assembly (1) has three key dimensions, including the end cap distance L1 between the two end caps (11), the hole distance L2 between the two positioning holes (12), the end cap distance L1, and the symmetry L3 of the two positioning holes (12).

4. The inspection fixture according to claim 1, characterized in that, The length of the end cap from the gauge (3) is 57.5 + 0.40 - 0.20 mm, the distance between the center lines of the two protruding pins (4) is L2 = 130 ± 0.20 mm, and the symmetry of the end cap from the gauge (3) and the two protruding pins (4) is ≡ 0.5A.

5. The inspection fixture according to claim 3, characterized in that, The spherical pin is cylindrical in the middle, the positioning hole (12) is circular, and correspondingly, the end cap is recessed along the side facing the base (2) to form a receiving cavity (31). At least part of the end cap (11) and the elastomer (13) are placed in the receiving cavity (31), and the protruding pin (4) is cylindrical.

6. The inspection fixture according to claim 5, characterized in that, The connection between the elastomer (13) and the end cap (11) is stepped, and the left and right sides of the receiving cavity (31) are respectively connected to the abutment surface (32), which is arc-shaped.

7. The inspection fixture according to claim 5, characterized in that, The protruding pin (4) includes a guide (41) and a support (42) from top to bottom. One side of the support (42) is connected to the base (2), and the other side is connected to the guide (41). The connection between the support (42) and the guide (41) is the bearing surface. The diameter of the guide (41) is the same as the diameter of the positioning hole (12), and the diameter of the support (42) is larger than the diameter of the positioning hole (12).

8. The inspection fixture according to claim 7, characterized in that, The height of the bearing (42) is higher than the height of the end cap from the gauge (3).

9. The inspection fixture according to claim 7, characterized in that, The guide member (41) has a chamfer on the side opposite to the support member (42).

10. The inspection fixture according to claim 1, characterized in that, The base (2) is provided with multiple height-adjustable support legs (5) at its bottom, and a handle (6) is provided on the outer periphery of the base (2).

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