Special-shaped screw testing fixture

Abstract

The utility model relates to a special-shaped screw detection tool, and aims to provide a detection tool capable of accurately and efficiently detecting the shape of a special-shaped screw. The testing fixture is characterized by comprising a base with an axisymmetric structure, a spherical groove, a cavity, a convex block, an adjusting screw rod, a V-shaped block and the like. A long-strip-shaped groove is formed in the base, the spherical groove is matched with the nut end of the special-shaped screw, a through hole and an inner threaded hole are formed in the side wall of the cavity, and a first spring is arranged in the through hole. The protruding block is arranged in the cavity, makes contact with the first spring and is provided with a through hole corresponding to the penetrating hole, and the pin shaft is inserted into the through hole to achieve sliding. The adjusting screw rod is connected with the inner threaded hole and is used for fixing the convex block. The V-shaped block and the base are coaxially arranged, and support is provided for the special-shaped screw. The device has the advantages of compact structure, high detection precision, strong adaptability and the like.

Description

Technical Field

[0001] This application relates to the field of fastener inspection technology, specifically a non-standard screw inspection tool. Background Technology

[0002] In the traditional field of mechanical manufacturing, the inspection and calibration of irregularly shaped screws has always been a technical challenge. Traditional methods typically employ general-purpose measuring tools and manual inspection. While these methods are simple to operate, they are prone to significant errors and are inefficient. Furthermore, due to the unique shape of irregularly shaped screws, traditional measuring tools are ill-suited to their inspection requirements, resulting in inaccurate inspection results that severely impact production quality and efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a non-circular screw inspection fixture. To solve the aforementioned problems, this fixture can accurately and efficiently inspect the shape of non-circular screws, improving inspection accuracy and production efficiency. To achieve the above objective, this application provides the following technical solution: A non-circular screw inspection fixture, comprising:

[0004] The base is an axisymmetric structure and has an elongated groove along its axial direction;

[0005] A spherical groove is provided on the axis of the base, and the spherical groove is adapted to the nut end of the irregular-shaped screw to be tested;

[0006] A cavity is provided in the base, and the side wall of the cavity is provided with a through hole and an internal threaded hole. The through hole is a square hole, and a first spring is provided inside the cavity.

[0007] A protrusion is disposed in the cavity, the protrusion contacts the first spring, and its side wall is provided with a through hole corresponding to the through hole. A pin is inserted into the through hole and can slide along the through hole. The protrusion contacts the concave surface of the irregular screw.

[0008] An adjusting screw is threadedly connected to the internal threaded hole, and one end of the adjusting screw abuts against the protrusion to fix the protrusion to the cavity;

[0009] V-block, the V-block is disposed on the base and coaxial with the base, the V-block holds the irregular screw to be tested.

[0010] In a preferred embodiment of this technical solution, the bottom surface of the V-shaped block and the bottom surface of the groove are on the same plane.

[0011] In a preferred embodiment, the present technical solution further includes a positioning block, which is disposed at one end of the base and is coaxially arranged with the V-shaped block.

[0012] In a preferred embodiment, this technical solution further includes a T-shaped block and a second spring. An auxiliary block is connected to the side wall of the base. A cavity is provided on the top of the auxiliary block. The cavity is used to accommodate the bottom of the T-shaped block. The bottom of the T-shaped block is hinged to the inner wall of the cavity. One end of the T-shaped block is located above the V-shaped block. The second spring is disposed on the top of the auxiliary block, and one end is in contact with the bottom of the horizontal end of the T-shaped block.

[0013] In a preferred embodiment of this technical solution, the V-shaped block and the base are integrally formed.

[0014] In a preferred embodiment of this technical solution, the angle between the end of the T-block that contacts the second spring and its vertical end is an obtuse angle.

[0015] In a preferred embodiment of this technical solution, the top surface of the auxiliary block is an inclined surface, and the end where the second spring is located is lower than the end where it is hinged to the T-shaped block.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] This invention employs an axisymmetric base and a spherical groove on the base's axis to precisely fit the nut end of the irregularly shaped screw to be inspected, thus ensuring accuracy during the inspection process. This structural design allows the fixture to better capture the shape characteristics of the irregularly shaped screw, effectively improving inspection accuracy. The elongated groove on the base and the structural design within the cavity, including a through hole, an internal threaded hole, and a first spring, allow the fixture to adapt to the groove structure of the irregularly shaped screw during inspection. The contact between the protrusion and the first spring, along with the sliding mechanism of the pin, ensures smooth movement of the irregularly shaped screw during inspection, significantly improving inspection efficiency. The adjustable screw allows for the fixation of the protrusion and the cavity, enhancing the fixture's stability and facilitating fine-tuning of the irregularly shaped screw during inspection, further improving accuracy. The introduction of a V-block, coaxially positioned with the base, provides a stable support platform for the irregularly shaped screw to be inspected, making the inspection process more stable and reliable. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of an irregularly shaped screw gauge proposed in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the internal structure of an irregularly shaped screw gauge proposed in an embodiment of this application;

[0020] In the diagram: 1. Base; 2. Groove; 3. Spherical groove; 4. Cavity; 5. Through hole; 6. Internal threaded hole; 7. First spring; 8. Protrusion; 9. Through hole; 10. Pin; 11. V-block; 12. Positioning block; 13. T-block; 14. Second spring; 15. Auxiliary block; 16. Chamber; 17. Adjusting screw. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that in the description of this application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0025] In order to solve the technical problems in the background art, such as Figure 1-2 As shown, this application provides a technical solution: an irregularly shaped screw gauge, characterized as follows:

[0026] The base 1 is designed with an axisymmetric structure to ensure stability and symmetry. The base 1 can be made of high-strength metal or engineering plastic to ensure durability and rigidity during use. An elongated groove 2 is provided along the axial direction of the base 1. This groove 2 guides and fixes the irregularly shaped screw to be inspected, allowing it to be placed stably in the fixture. A spherical groove 3 is precisely positioned along the axis of the base 1. Its shape and size are designed to fit the nut end of the irregularly shaped screw to be inspected, ensuring accurate capture of the nut end during inspection. A cavity 4 is located within the base 1, and its sidewalls have a through hole 5 and an internally threaded hole 6. The through hole 5 is designed as a square hole to accommodate the sliding of the pin 10. A first spring 7 is provided within the cavity 4. This first spring 7 provides elasticity to the protrusion 8, ensuring that the protrusion 8 can make tight contact with the concave surface of the irregularly shaped screw. The protrusion 8 is located within the cavity 4 and contacts the first spring 7. The side wall of the protrusion 8 has a through hole 9, which corresponds to the through hole 5. A pin 10 is inserted into the through hole 5 and can slide within it to adjust the position of the protrusion 8. An adjusting screw 17 is threadedly connected to an internal threaded hole 6, with one end abutting against the protrusion 8. By rotating the adjusting screw 17, the protrusion 8 can be fixed to the cavity 4, thereby adjusting the pressure of the protrusion 8 on the concave surface of the irregularly shaped screw. A V-block 11 is mounted on the base 1 and is coaxial with the base 1, used to place the irregularly shaped screw to be tested. The design of the V-block 11 ensures the stability and positioning accuracy of the screw during the testing process.

[0027] It should be noted that the bottom surface of the V-block 11 is aligned with the bottom surface of the elongated groove 2, ensuring that they are on the same plane. The V-block 11 is mounted on the base 1 and is coaxial with the base 1, used to place the irregularly shaped screw to be inspected. The bottom surface of the V-block 11 is on the same plane as the bottom surface of the groove 2. This design allows the V-block 11 to make stable contact with the base 1, while ensuring the stability and positioning accuracy of the screw during the inspection process.

[0028] It should be noted that the positioning block 12 is located at one end of the base 1 and is coaxially arranged with the V-block 11. The function of the positioning block 12 is to provide positioning for one end of the irregularly shaped screw to be inspected, ensuring the centering and stability of the screw during the inspection process. The positioning block 12 can be designed to be adjustable to accommodate screws of different lengths, or it can be designed to be fixed to meet the inspection requirements of screws of specific lengths.

[0029] It should be noted that an auxiliary block 15 is connected to the side wall of the base 1, and a chamber 16 is provided on the top of the auxiliary block 15. The chamber 16 is used to accommodate the bottom of the T-block 13. The bottom of the T-block 13 is hinged to the inner wall of the chamber 16. This design allows the T-block 13 to move within a certain range. One end of the T-block 13 is located above the V-block 11, which is used to apply additional positioning or pressure to the irregular screw during the detection process. The second spring 14 is located on the top of the auxiliary block 15, and one end is in contact with the bottom of the horizontal end of the T-block 13. The function of the second spring 14 is to provide elastic force to the T-block 13 to ensure that the T-block 13 and the irregular screw maintain appropriate contact force.

[0030] It should be noted that since the V-block 11 and the base 1 are integrally molded, the assembly process of the inspection fixture is simplified. Simply place the base 1 on the workbench and ensure that it is level and stable.

[0031] It should be noted that the angle between the end of the T-block 13 that contacts the second spring 14 and its vertical end is an obtuse angle. This design makes the T-block 13 more stable when pressure is applied, and provides a larger contact area and a more uniform force distribution.

[0032] It is worth noting that the auxiliary block 15 is an integral part of the side wall of the base 1, designed with a sloping top surface. This design helps guide and position the movement of the T-block 13. The auxiliary block 15 is positioned such that one end of the second spring 14 is lower than the end that is hinged to the T-block 13. The cavity 16 at the top of the auxiliary block 15 is used to accommodate the bottom of the T-block 13, and the bottom of the T-block 13 is hinged to the inner wall of the cavity 16, allowing the T-block 13 to move within a certain angular range.

[0033] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-standard screw gauge, characterized in that, include: The base (1) is an axisymmetric structure and has an elongated groove (2) along its axial direction; A spherical groove (3) is provided on the axis of the base (1), and the spherical groove (3) is adapted to the nut end of the irregular screw to be tested; A cavity (4) is provided on the base (1). The side wall of the cavity (4) is provided with a through hole (5) and an internal thread hole (6). The through hole (5) is a square hole. A first spring (7) is provided inside the cavity (4). A protrusion (8) is disposed in the cavity (4). The protrusion (8) contacts the first spring (7), and its side wall is provided with a through hole (9) corresponding to the through hole (5). A pin (10) is inserted into the through hole (9). The pin (10) can slide along the through hole (5). The protrusion (8) contacts the concave surface of the irregular screw. Adjusting screw (17), the adjusting screw (17) is threadedly connected to the internal threaded hole (6), and one end of it abuts against the protrusion (8) to fix the protrusion (8) and the cavity (4); V-block (11), the V-block (11) is disposed on the base (1) and is coaxial with the base (1), the V-block (11) holds the irregular screw to be tested.

2. The irregular screw inspection fixture according to claim 1, characterized in that, The bottom surface of the V-shaped block (11) and the bottom surface of the groove (2) are on the same plane.

3. The irregular screw inspection fixture according to claim 2, characterized in that, It also includes a positioning block (12), which is disposed at one end of the base (1) and is coaxially disposed with the V-shaped block (11).

4. The irregular screw inspection fixture according to claim 3, characterized in that, It also includes a T-shaped block (13) and a second spring (14). An auxiliary block (15) is connected to the side wall of the base (1). A cavity (16) is provided on the top of the auxiliary block (15). The cavity (16) is used to accommodate the bottom of the T-shaped block (13). The bottom of the T-shaped block (13) is hinged to the inner wall of the cavity (16). One end of the T-shaped block (13) is located above the V-shaped block (11). The second spring (14) is located on the top of the auxiliary block (15), and one end is in contact with the bottom of the horizontal end of the T-shaped block (13).

5. The irregularly shaped screw inspection fixture according to claim 1, characterized in that, The V-shaped block (11) is integrally formed with the base (1).

6. The irregular screw inspection fixture according to claim 4, characterized in that, The angle between the end of the T-block (13) that contacts the second spring (14) and its vertical end is an obtuse angle.

7. The irregular screw inspection fixture according to claim 4, characterized in that, The top surface of the auxiliary block (15) is inclined, and the end where the second spring (14) is located is lower than the end where it is hinged to the T-block (13).

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