Gear tooth profile detection tool

Abstract

A gear tooth profile detection tool comprises a base, a supporting column, a rotary table, a standard gear and a gear to be detected. A sliding rail structure is further arranged at the top end of the base. The sliding rail structure comprises a sliding rail body and two supporting plates. The supporting column is provided with a sliding hole, and the sliding rail body is sleeved with the supporting column in a sliding mode through the sliding hole. A cavity is formed in the supporting column. And a fixing structure is arranged in the cavity. The fixing structure comprises a pressing part, a driving part, a pressing part and an elastic part. When the sliding rail is used, a worker holds the supporting column with a hand, meanwhile, the supporting column is not fixed to the sliding rail body any more, the supporting column can directly slide by holding the supporting column, after the hand of the worker loosens the supporting column, the supporting column can be automatically fixed to the sliding rail body, and the fixing and loosening processes between the supporting column and the sliding rail are rapid and convenient. Therefore, the working efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gear size detection technology, specifically a gear tooth profile detection fixture. Background Technology

[0002] Gears are mechanical components with continuously meshing gears on their rims that transmit motion and power. They are characterized by a wide range of transmission power, high efficiency, accurate transmission ratio, long service life, and safe and reliable operation, and are important components of mechanical transmission systems.

[0003] After gear hobbing is completed and before being put into use, the dimensional tolerances of the teeth and shaft holes, as well as the tooth profile, need to be inspected to determine whether they are qualified and meet design requirements. Currently, the routine inspection of gear tooth profiles is performed by dedicated quality control inspectors on a specialized inspection platform. Gears with non-compliant tooth profiles are then returned to the machining station for correction. However, this conventional inspection method requires numerous inspection tools and measuring instruments, the clamping operation of the gears to be tested is cumbersome, time-consuming, and the inspection process is lengthy, directly affecting inspection efficiency and production efficiency.

[0004] To address the problems of conventional inspection methods, Chinese Patent No. CN212747630U discloses a gear tooth profile inspection fixture. This fixture includes a base located at the gear machining station, a support column slidably mounted on the base, a turntable fixedly located in the middle of the base, and a standard gear rotatably mounted on the top of the support column for inspecting the tooth profile of the gear to be tested. The turntable includes a base, a positioning mandrel, and a disc. The positioning mandrel is rotatably connected to the base, and the disc is fixedly connected to the positioning mandrel and supports the gear to be tested. The gear to be tested is detachably mounted on the positioning mandrel and rotates synchronously with it. The standard gear matches and meshes with the gear to be tested. This invention, through the positioning mandrel and disc, allows for rapid clamping of the gear to be tested. The structure is simple, and the gear meshes with the standard gear to simulate transmission, thus enabling gear tooth profile inspection at the gear machining station. This results in a shorter process, saves time, and increases inspection efficiency.

[0005] The utility model describes in its specification that "a support plate 222 is also provided on the outer wall of the rod 220. The support plate 222 is located above another L-shaped corner plate 111, and a locking screw 223 is threadedly connected in the middle. The locking screw 223 passes through the support plate 222 and abuts against the top surface of the L-shaped corner plate 111. The support column 200 can be locked on the slide groove 110 by the locking screw 223. When it is necessary to slide the support column 200, the locking screw 223 can be loosened." "The support column 200 is slid to adjust the center distance between the standard gear 400 and the gear to be tested 500 so that they mesh with each other." "The support column 200 is slid to disengage the standard gear 400 from the gear to be tested 500. Then, the gear to be tested 500 is moved to offset the hobbing gear with seriously unqualified tooth shape size. Then the support column 200 is slid to re-engage the standard gear 400 and the gear to be tested 500." As described above, during the testing process, if the hobbing on the gear under test becomes stuck, the screw must first be loosened, then the support column must be slid to disengage the standard gear from the gear under test, then the support column must be slid back to its original position, and finally the screw must be tightened. If multiple hobbing teeth on the gear under test become stuck, the operator must repeatedly tighten and loosen the screws. This method of fixing the support column with screws is relatively inconvenient and has a certain impact on work efficiency. Therefore, this utility model still has room for improvement. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a gear tooth profile detection fixture. This fixture allows the worker to hold the support column while it is no longer fixed to the slide rail body, enabling direct sliding of the column. When the worker releases the column, it automatically reattaches to the slide rail body. This quick and convenient process of fixing and releasing the support column from the slide rail improves work efficiency and reduces labor intensity.

[0007] A gear tooth profile inspection fixture includes a base, a support column, a turntable, a standard gear, and a gear to be inspected. The top of the base is also provided with a slide rail structure, which includes two support plates and a slide rail body fixedly connected between the two support plates. A sliding hole is formed in the support column, allowing it to slide onto the outside of the slide rail body. A cavity communicating with the sliding hole is formed inside the support column. A fixing structure for fixing the support column to the slide rail is provided inside the cavity. The fixing structure includes a pressing component, a driving component, a clamping component, and an elastic component. The clamping component clamps the slide rail body; a portion of the pressing component is located outside the support column, and another portion is located inside the cavity. The pressing component, driven by the driving component, moves the clamping component away from the slide rail body and causes the elastic component to deform. The deformation of the elastic component generates a rebound force that causes the clamping component to move towards the slide rail body.

[0008] By adopting the above technical solution, when the support column needs to be slidable, the worker directly grasps the column and presses down on the part of the pressing component located outside the column. The pressing component, through the driving component, drives the clamping component to move away from the slide rail body, causing the elastic component to deform. The clamping component is no longer pressed against the slide rail body, and the column is no longer fixed to the slide rail body, at which point the column can slide along the slide rail body. Similarly, when it is necessary to fix the column to the slide rail body, the worker releases the column, and under the rebound force of the elastic component, the clamping component moves towards the slide rail body and presses against the slide rail body, thereby fixing the column to the slide rail body. In use, this utility model allows the worker to de-fix the column from the slide rail body simply by grasping it, allowing direct sliding of the column, and automatically fixes it to the slide rail body after the worker releases the column. The process of fixing and releasing the column from the slide rail is quick and convenient, thereby improving work efficiency and reducing labor intensity.

[0009] A further feature of this invention is that the pressing component has anti-slip textures on the side near the slide rail body.

[0010] By adopting the above technical solution, the anti-slip texture can improve the stability of the pressing component when pressing the slide rail body.

[0011] Further features of this invention: the cavity is located directly opposite the sliding hole, the sliding hole communicates directly with the cavity; the pressing component includes a first pressing rod and a second pressing rod; the elastic component includes a first spring and a second spring; the driving component includes a first L-shaped sliding plate and a second L-shaped sliding plate; the pressing component includes a first pressing plate and a second pressing plate; the first L-shaped sliding plate and the second L-shaped sliding plate are slidably connected in the cavity in a centrally symmetrical manner; the first L-shaped sliding plate includes a first intermediate plate and a first push plate; the first pressing plate is fixed to the end of the first intermediate plate opposite to the first push plate; the second L-shaped sliding plate includes a second intermediate plate and a second push plate; the second pressing plate is fixed to the end of the first intermediate plate opposite to the first push plate; the second L-shaped sliding plate includes a second intermediate plate and a second push plate; the second pressing plate is fixed to the end of the first intermediate plate opposite to the first push plate. The first pressing plate is located between the second push plate and the second pressing plate, and the second pressing plate is located between the first push plate and the first pressing plate. The first pressing plate and the second pressing plate are respectively pressed against both sides of the slide rail body. The first spring is fixedly connected between the first push plate and the second pressing plate, and the second spring is fixedly connected between the second push plate and the first pressing plate. One end of the first pressing rod is fixedly connected to the first push plate, and the other end of the first pressing rod passes through the support column in a sliding connection manner. One end of the second pressing rod is fixedly connected to the second push plate, and the other end of the second pressing rod passes through the support column in a sliding connection manner.

[0012] By adopting the above technical solution, when the sliding support needs to be moved, the worker holds the support while pressing the first and second pressing rods. Both the first and second pressing rods move into the cavity, thereby driving the first and second push plates to move towards each other along the cavity. The first push plate drives the first pressing plate to move along the cavity through the first intermediate plate, and the second push plate drives the second pressing plate to move along the cavity through the second intermediate plate, thereby causing the first and second pressing plates to move in opposite directions, both moving away from the slide rail body. Simultaneously, as the first pressing plate and the second push plate move towards each other, the second spring between them is compressed, generating a rebound force. After the first and second pressing plates move away from the slide rail body, neither of them presses against the slide rail body anymore, and the support can then slide along the slide rail body. Similarly, when it is necessary to fix the support, the staff releases the support, that is, releases the first pressing rod and the second pressing rod. Under the action of the rebound force of the first spring and the second spring, the first pressing plate and the second pressing plate move towards each other. The first pressing plate and the second pressing plate press against the slide rail body, thus fixing the support to the slide rail body.

[0013] A further feature of this invention is that a pressing plate is fixed to one end of both the first pressing rod and the second pressing rod that protrudes from the cavity.

[0014] By adopting the above technical solution, the setting of the pressing plate increases the force-bearing area of ​​the first pressing rod and the second pressing rod, making it easier for staff to press.

[0015] Further features of this invention: The cavity is located above the sliding hole, and a through hole connects the sliding hole and the cavity. An opening communicating with the cavity is provided on the outer wall of the support column. The pressing component is a button. The driving component includes a rotating shaft and a rotating block. The clamping component includes a clamping rod and a tube. The elastic component is a spring body. The tube is fixed to the inner top wall of the cavity and extends vertically. The top end of the clamping rod slides into the tube, and the bottom end of the clamping rod passes through the through hole and presses against the slide rail body. A connecting seat is fixed on the outer wall of the clamping rod. The spring body is fixedly connected between the top end of the clamping rod and the inner top wall of the cavity. The rotating shaft is rotatably connected inside the cavity. One end of the button is fixedly connected to the rotating shaft, and the other end of the button protrudes from the support column through the opening. One end of the rotating block is fixedly connected to the rotating shaft, and the other end of the rotating block is hinged to the connecting seat.

[0016] By adopting the above technical solution, when the support column needs to be slidable, the operator holds the column while pressing the button. The button rotates into the cavity through the opening. The button drives the rotating shaft to rotate. The rotating shaft drives the rotating block to rotate upward around the shaft. The rotating block drives the clamping rod to move upward along the pipe through the connecting seat. At the same time, the spring body is compressed, creating a downward rebound force. After the clamping rod moves upward, it is no longer pressed against the slide rail body, and the support column can slide along the slide rail body. Similarly, when the support column needs to be fixed, the operator releases the support column, that is, releases the button. Under the action of the spring body's rebound force, the clamping rod moves downward and presses against the slide rail body, thus fixing the support column to the slide rail body.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] A gear tooth profile detection fixture is disclosed. When in use, the operator can loosen the support column by holding it with their hand, allowing the column to slide directly. When the operator releases the support column, it automatically locks onto the slide rail. The process of fixing and loosening the support column from the slide rail is quick and convenient, thereby improving work efficiency and reducing labor intensity. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of Example 1;

[0020] Figure 2 A partial cross-sectional view of Example 1 Figure 1 ;

[0021] Figure 3 A partial cross-sectional view of Example 1 Figure 2 ;

[0022] Figure 4 This is a three-dimensional structural diagram of Example 2;

[0023] Figure 5 This is a partial cross-sectional view of Embodiment 2.

[0024] Reference numerals: 1. Base; 2. Support column; 3. Turntable; 4. Standard gear; 5. Gear to be tested; 6. Support plate; 7. Slide rail body; 8. Sliding hole; 9. Cavity; 10. First pressing rod; 11. Second pressing rod; 12. First spring; 13. Second spring; 14. First clamping plate; 15. Second clamping plate; 16. First intermediate plate; 17. First push plate; 18. Second intermediate plate; 19. Second push plate; 20. Through hole; 21. Opening; 22. Button; 23. Rotating shaft; 24. Rotating block; 25. Clamping rod; 26. Pipe fitting; 27. Spring body; 28. Connecting seat. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] A gear tooth profile inspection fixture, such as Figures 1-3 As shown, the fixture includes a base 1, a support column 2, a turntable 3, a standard gear 4, and a gear to be inspected 5. This embodiment is a technical improvement to address the inconvenience of sliding the support column 2 in the gear tooth profile inspection fixture described in Chinese Patent No. CN212747630U. Therefore, this embodiment does not provide a detailed description of the base 1, support column 2, turntable 3, standard gear 4, and gear to be inspected 5. The specific structures of the base 1, support column 2, turntable 3, standard gear 4, and gear to be inspected 5, as well as their positional and connection relationships, can be found in the description of the gear tooth profile inspection fixture in Chinese Patent No. CN212747630U.

[0028] The top of the base 1 is also equipped with a slide rail structure. The slide rail structure includes two support plates 6 and a slide rail body 7 fixedly connected between the two support plates 6. A sliding hole 8 is provided on the support column 2, which passes through the support column 2 laterally. The support column 2 is slidably fitted onto the outside of the slide rail body 7 through the sliding hole 8. A cavity 9 communicating with the sliding hole 8 is provided inside the support column 2. A fixing structure for fixing the support column 2 to the slide rail is provided inside the cavity 9. The fixing structure includes a pressing component, a driving component, a clamping component, and an elastic component. The clamping component is used to clamp the slide rail body 7. Part of the pressing component is located outside the support column 2, and the other part is located inside the cavity 9. The pressing component is used to drive the clamping component to move away from the slide rail body 7 through the driving component, and to cause the elastic component to deform. After the elastic component deforms, it can generate a rebound force that causes the clamping component to move towards the slide rail body 7. The side of the clamping component near the slide rail body 7 is provided with anti-slip texture, which can improve the stability of the clamping component when clamping the slide rail body 7.

[0029] The cavity 9 is located directly opposite the sliding hole 8, which communicates directly with the cavity 9. The pressing component includes a first pressing rod 10 and a second pressing rod 11. The elastic component includes a first spring 12 and a second spring 13. The driving component includes a first L-shaped sliding plate and a second L-shaped sliding plate. The clamping component includes a first clamping plate 14 and a second clamping plate 15. The first L-shaped sliding plate and the second L-shaped sliding plate are centrally symmetrically connected within the cavity 9. The first L-shaped sliding plate includes a first intermediate plate 16 and a first push plate 17. The first clamping plate 14 is fixed to the first intermediate plate 16 at one end opposite to the first push plate 17. The second L-shaped sliding plate includes a second intermediate plate 18 and a second push plate 19. The second clamping plate 15 is fixed to the second intermediate plate 18 at one end opposite to the second push plate 19. The first clamping plate 14 is located between the second push plate 19 and the second clamping plate 15. The second clamping plate 15 is located between the first push plate 17 and the first clamping plate 14. The first pressing plate 14 and the second pressing plate 15 are respectively pressed against both sides of the slide rail body 7. The first spring 12 is fixedly connected between the first push plate 17 and the second pressing plate 15. The second spring 13 is fixedly connected between the second push plate 19 and the first pressing plate 14. One end of the first pressing rod 10 is fixedly connected to the first push plate 17, and the other end of the first pressing rod 10 passes through the support column 2 in a sliding connection manner. One end of the second pressing rod 11 is fixedly connected to the second push plate 19, and the other end of the second pressing rod 11 passes through the support column 2 in a sliding connection manner.

[0030] By adopting the above technical solution, when the sliding support 2 needs to be slidable, the worker holds the support 2 while pressing the first pressing rod 10 and the second pressing rod 11. Both the first pressing rod 10 and the second pressing rod 11 move into the cavity 9, thereby driving the first push plate 17 and the second push plate 19 to move towards each other along the cavity 9. The first push plate 17 drives the first pressing plate 14 to move along the cavity 9 via the first intermediate plate 16, and the second push plate 19 drives the second pressing plate 15 to move along the cavity 9 via the second intermediate plate 18, thereby causing the first pressing plate 14 and the second pressing plate 15 to move in opposite directions, both moving away from the slide rail body 7. Simultaneously, as the first pressing plate 14 and the second push plate 19 move towards each other, the second spring 13 between them is compressed, generating a rebound force. As the second pressing plate 15 and the first push plate 17 move towards each other, the first spring 12 between them is compressed, generating a rebound force. After the first clamping plate 14 and the second clamping plate 15 move away from the slide rail body 7, neither the first clamping plate 14 nor the second clamping plate 15 will press against the slide rail body 7, and the support column 2 can slide along the slide rail body 7. Similarly, when it is necessary to fix the support column 2, the operator releases the support column 2, that is, releases the first pressing rod 10 and the second pressing rod 11. Under the action of the rebound force of the first spring 12 and the second spring 13, the first clamping plate 14 and the second clamping plate 15 move towards each other, and both the first clamping plate 14 and the second clamping plate 15 press against the slide rail body 7, thus fixing the support column 2 to the slide rail body 7.

[0031] When using this invention, the worker can remove the support column 2 from the slide rail body 7 by holding it with their hand. Holding the support column 2 allows the worker to slide it directly. When the worker releases the support column 2, it will automatically be fixed to the slide rail body 7. The process of fixing and releasing the support column 2 from the slide rail is quick and convenient, thereby improving work efficiency and reducing labor intensity.

[0032] Example 2:

[0033] The difference from Embodiment 1 is that the cavity 9 is no longer directly opposite the sliding hole 8, the pressing component no longer includes the first pressing rod 10 and the second pressing rod 11, the elastic component no longer includes the first spring 12 and the second spring 13, the driving component no longer includes the first L-shaped sliding plate and the second L-shaped sliding plate, and the pressing component no longer includes the first pressing plate 14 and the second pressing plate 15. Instead, it is as follows: Figure 4 and Figure 5 As shown, cavity 9 is located above sliding hole 8. A through hole 20 connects sliding hole 8 and cavity 9. An opening 21 communicating with cavity 9 is provided on the outer wall of support 2. The pressing component is button 22. The driving component includes rotating shaft 23 and rotating block 24. The clamping component includes clamping rod 25 and tube 26. The elastic component is spring body 27. Tube 26 is fixed to the inner top wall of cavity 9 and extends vertically. The top end of clamping rod 25 slides into tube 26. The bottom end of clamping rod 25 passes through through hole 20 and presses against slide rail body 7. A connecting seat 28 is fixed to the outer wall of clamping rod 25. Spring body 27 is fixedly connected between the top end of clamping rod 25 and the inner top wall of cavity 9. Rotating shaft 23 is rotatably connected inside cavity 9. One end of button 22 is fixedly connected to the rotating shaft 23, and the other end of button 22 passes through the support column 2 through the opening 21. One end of rotating block 24 is fixedly connected to the rotating shaft 23, and the other end of rotating block 24 is hinged to the connecting seat 28.

[0034] When the support column 2 needs to be slidable, the operator holds the support column 2 while pressing button 22. Button 22 rotates into cavity 9 through opening 21. Button 22 drives rotating shaft 23 to rotate. Rotating shaft 23 drives rotating block 24 to rotate upward around shaft 23. Rotating block 24 drives clamping rod 25 to move upward along pipe 26 through connecting seat 28. At the same time, spring body 27 is compressed, forming a downward rebound force. After clamping rod 25 moves upward, it is no longer pressed against slide rail body 7, and support column 2 can slide along slide rail body 7. Similarly, when it is necessary to fix support column 2, the operator releases support column 2, that is, releases button 22. Under the action of the rebound force of spring body 27, clamping rod 25 moves downward and presses against slide rail body 7, thus fixing support column 2 to slide rail body 7.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gear tooth profile inspection fixture, comprising a base (1), a support column (2), a turntable (3), a standard gear (4), and a gear to be inspected (5), characterized in that: The top of the base (1) is also provided with a slide rail structure. The slide rail structure includes two support plates (6) and a slide rail body (7) fixedly connected between the two support plates (6). The support column (2) is provided with a sliding hole (8) that passes through the support column (2) laterally. The support column (2) is slidably sleeved on the outside of the slide rail body (7) through the sliding hole (8). The inside of the support column (2) is provided with a cavity (9) that communicates with the sliding hole (8). The cavity (9) is provided with a fixing structure for fixing the support column (2) on the slide rail. The fixing structure includes a pressing component, a driving component, a clamping component and an elastic component. The clamping component is used to clamp the slide rail body (7). A part of the pressing component is located outside the support column (2) and another part is located inside the cavity (9). The pressing component is used to drive the clamping component to move away from the slide rail body (7) through the driving component and to cause the elastic component to deform. After the elastic component deforms, it can form a rebound force that causes the clamping component to move towards the slide rail body (7).

2. The gear tooth profile inspection fixture according to claim 1, characterized in that: The clamping component has anti-slip texture on the side near the slide rail body (7).

3. The gear tooth profile detection fixture according to claim 1, characterized in that: The cavity (9) is located directly opposite the sliding hole (8), and the sliding hole (8) is directly connected to the cavity (9). The pressing component includes a first pressing rod (10) and a second pressing rod (11). The elastic component includes a first spring (12) and a second spring (13). The driving component includes a first L-shaped sliding plate and a second L-shaped sliding plate. The pressing component includes a first pressing plate (14) and a second pressing plate (15). The first L-shaped sliding plate and the second L-shaped sliding plate are centrally symmetrically connected in the cavity (9). The first L-shaped sliding plate includes a first intermediate plate (16) and a first push plate (17). The first pressing plate (14) is fixed on the first intermediate plate (16) at one end away from the first push plate (17). The second L-shaped sliding plate includes a second intermediate plate (18) and a second push plate (19). The second pressing plate (15) is fixed on the second intermediate plate (18) at one end away from the second push plate (17). At one end of 19), the first pressing plate (14) is located between the second push plate (19) and the second pressing plate (15), the second pressing plate (15) is located between the first push plate (17) and the first pressing plate (14), the first pressing plate (14) and the second pressing plate (15) are respectively pressed against both sides of the slide rail body (7), the first spring (12) is fixedly connected between the first push plate (17) and the second pressing plate (15), the second spring (13) is fixedly connected between the second push plate (19) and the first pressing plate (14), one end of the first pressing rod (10) is fixedly connected to the first push plate (17), the other end of the first pressing rod (10) passes through the support column (2) in a sliding connection manner, one end of the second pressing rod (11) is fixedly connected to the second push plate (19), and the other end of the second pressing rod (11) passes through the support column (2) in a sliding connection manner.

4. The gear tooth profile detection fixture according to claim 3, characterized in that: A pressing plate is fixed to one end of the first pressing rod (10) and the second pressing rod (11) that protrudes from the cavity (9).

5. The gear tooth profile inspection fixture according to claim 1, characterized in that: The cavity (9) is located above the sliding hole (8). A through hole (20) connects the sliding hole (8) and the cavity (9). The sliding hole (8) and the cavity (9) are connected through the through hole (20). An opening (21) communicating with the cavity (9) is provided on the outer wall of the support column (2). The pressing component is a button (22). The driving component includes a rotating shaft (23) and a rotating block (24). The pressing component includes a pressing rod (25) and a tube (26). The elastic component is a spring body (27). The tube (26) is fixed to the inner top wall of the cavity (9) and extends vertically. The top end of the pressing rod (25) is slidably connected to the square. The bottom end of the clamping rod (25) passes through the through hole (20) and presses against the slide rail body (7). A connecting seat (28) is fixed on the outer wall of the clamping rod (25). The spring body (27) is fixedly connected between the top end of the clamping rod (25) and the inner top wall of the cavity (9). The rotating shaft (23) is rotatably connected in the cavity (9). One end of the button (22) is fixedly connected to the rotating shaft (23). The other end of the button (22) passes through the support column (2) through the opening (21). One end of the rotating block (24) is fixedly connected to the rotating shaft (23). The other end of the rotating block (24) is hinged to the connecting seat (28).

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