Gear production chamfering device

Abstract

The application relates to the technical field of gear machining, in particular to a gear production chamfering device which comprises a device main body, a rotating chuck is arranged at the inner back side of the device main body, a chamfering tool is arranged at the front of the inner bottom surface of the device main body and close to the rotating chuck through a moving mechanism, a connecting column is fixedly inserted into the front end surface of the rotating chuck, a connecting cylinder is fixedly connected to the front end surface of the connecting column, two symmetrical V-shaped plates are slidingly inserted into the two side surfaces of the connecting cylinder, a tensioning mechanism is arranged between the two V-shaped plates, a threaded rod is screwed into the front end surface of the connecting cylinder, a supporting block is fixedly connected to the rear end of the threaded rod, and a rotating cap is fixedly connected to the front end of the threaded rod. The three-dimensional positioning locking structure is adopted, the gear is multi-directionally constrained to prevent machining deviation, the device is suitable for gears of multiple specifications and can reduce tooling cost, and the device can also be used for realizing fast and accurate alignment assembly through inclined surface guidance.

Description

Technical Field

[0001] This invention relates to the field of gear processing technology, and in particular to a gear chamfering device. Background Technology

[0002] As a core component in the field of mechanical transmission, the chamfering of gear end faces is a crucial process in gear precision machining. The quality of the chamfering directly determines the gear assembly accuracy, transmission smoothness, and service life. During machining, the gear workpiece is precisely centered and locked, and rotates at a uniform speed with the chuck. The chamfering tool is fed precisely close to the edge to be machined on the gear. Utilizing the relative motion of the fixed tool and the rotating gear, sharp edges and burrs are removed at a uniform speed, turning the sharp corners into specified bevels or rounded angles, eliminating stress concentration, and ensuring that the tooth profile remains unchanged. This meets the requirements for smooth assembly and collision-free transmission in subsequent applications.

[0003] Existing gear chamfering equipment uses a relatively simple positioning method for gear workpieces, mostly relying on a single limiting structure for simple sleeve positioning of the gear shaft hole, lacking multi-dimensional limiting and locking structures. During the chamfering process, the continuous contact between the tool and the gear end face generates cutting forces, which can easily lead to problems such as circumferential offset, radial wobble, and axial movement of the gear. This results in machining defects such as gear chamfering dimensional deviation, uneven chamfering, and residual burrs on the edges and corners, significantly reducing the accuracy of gear chamfering and the product qualification rate.

[0004] Meanwhile, the existing positioning structure has extremely poor versatility. For gear shaft holes with different radial diameters, it is necessary to customize exclusive positioning fixtures, positioning mandrels and other auxiliary tools to achieve gear positioning. Customized fixtures have limited adaptability and low reusability, and cannot be adapted to the chamfering of gears of multiple specifications. Therefore, a gear chamfering device is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a gear chamfering device.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a gear chamfering device, comprising a device body, a rotating chuck disposed on the rear side of the device body, a chamfering tool mounted on the inner bottom surface of the device body near the front of the rotating chuck via a moving mechanism, a connecting column fixedly inserted into the front end face of the rotating chuck, a connecting cylinder fixedly connected to the front end face of the connecting column, two symmetrical V-shaped plates slidably inserted into the two side surfaces of the connecting cylinder, a tensioning mechanism disposed between the two V-shaped plates, a threaded rod threadedly inserted into the front end face of the connecting cylinder, a support block fixedly connected to the rear end of the threaded rod, a cap fixedly connected to the front end of the threaded rod, a pressure plate connected to the rear surface of the cap via a first elastic mechanism, the pressure plate slidably sleeved on the front end of the connecting cylinder, a limit block connected to the inner side of the pressure plate via a second elastic mechanism, and a sharpened portion disposed at the rear end of the limit block; Rotating the cap causes the threaded rod to rotate backward, causing the support block to push outward against the V-shaped plates symmetrically arranged on both sides. The V-shaped plates externally support and press against the gear shaft hole for centering and fixing. At the same time, the sharpened part of the limiting block is inserted into the keyway of the gear to circumferentially prevent the gear from rotating.

[0007] Preferably, the moving mechanism includes a Y-axis slide fixedly mounted on the upper surface of the device body, an X-axis slide fixedly mounted on the moving end of the Y-axis slide, a mounting base fixedly mounted on the moving end of the X-axis slide, a tool holder fixedly connected to the rear surface of the mounting base, and the chamfering tool fixedly mounted on the rear end of the tool holder.

[0008] Preferably, the outer surface of the cap is provided with anti-slip texture, and the front surface of the cap is provided with polygonal grooves.

[0009] Preferably, the connecting cylinder has two openings on each of its two side surfaces. The two ends of the V-shaped plate slide through the inner side of the opening. The rear end of the V-shaped plate is fixedly connected to a guide edge. The rear surface of the guide edge slides in cooperation with the port of the opening. The sides of the V-shaped plates that are close to each other have guide curved surfaces. The guide curved surfaces slide in contact with the rear edge of the support block.

[0010] Preferably, the tensioning mechanism includes an intermediate plate fixedly connected to the rear surface of the connecting cylinder, and tension springs are fixedly connected to both sides of the intermediate plate, with the ends of the tension springs on both sides being fixedly connected to the inner surface of the V-shaped plate.

[0011] Preferably, the first elastic mechanism includes an embedded cylinder fixedly connected to the front surface of the pressure plate. The front end of the embedded cylinder is provided with a bent edge. A sliding cavity is opened on the inner side of the cap. The bent edge slides into the inner side of the sliding cavity. A compression spring is provided on the inner side of the sliding cavity. The front surface of the bent edge is fixedly connected to the rear end of the compression spring.

[0012] Preferably, the second elastic mechanism includes a guide post fixedly connected to the front surface of the limiting block, the front end of the guide post slidingly penetrating the inner surface of the pressing plate, an indicator plate fixedly connected to the front end of the guide post, a movable opening being provided on the front surface of the pressing plate corresponding to the penetration of the guide post, the indicator plate slidingly inserting into the inner side of the movable opening, a guide plate fixedly connected to the front of the upper surface of the limiting block, the guide plate slidingly contacting the inner wall of the cap, and a clamping spring sleeved on the outer surface of the guide post, the clamping spring being located between the front surface of the limiting block and the inner surface of the pressing plate.

[0013] Preferably, the sharpened portion includes a top inclined surface formed on the upper surface of the limiting block, and side inclined surfaces are formed on both sides of the limiting block.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a three-dimensional positioning and locking structure with V-shaped plate centering and limiting, clamping plate clamping and limiting, and circumferential anti-rotation limiting of limiting block. The gear is synchronously constrained from three dimensions, which effectively avoids the problems of radial sway, axial movement and circumferential deflection of the gear during the chamfering process, and avoids the defects of chamfer size deviation and uneven chamfer caused by displacement. 2. This invention can be adapted to the centering and installation of gears with different tooth shaft hole diameters within a certain size range, saving the tooling customization and manufacturing costs and inventory management costs in the traditional chamfering process; 3. By setting the sharpened part as a guide, the present invention can quickly align the limiting block and smoothly insert it into the keyway, achieving fast and accurate alignment and limiting. The assembly process is smooth and labor-saving, reducing the difficulty of manual alignment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a gear chamfering device according to the present invention; Figure 2 This invention relates to a gear chamfering device. Figure 2 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the rotating chuck of a gear production chamfering device according to the present invention; Figure 4 This is a cross-sectional view of the cap of a gear manufacturing chamfering device according to the present invention; Figure 5 This invention relates to a gear chamfering device. Figure 4 Enlarged view at point B in the middle; Figure 6 This is a schematic diagram of the limiting block of a gear chamfering device according to the present invention; Figure 7 This is a cross-sectional view of the connecting cylinder of a gear production chamfering device according to the present invention; Figure 8This is a schematic diagram of a gear being processed using a gear chamfering device according to the present invention.

[0016] The components include: 1. Main body of the device; 2. Rotating chuck; 3. Connecting column; 4. Connecting cylinder; 5. Through port; 6. V-shaped plate; 7. Guide edge; 8. Guide curved surface; 9. Tension spring; 10. Support block; 11. Threaded rod; 12. Screw cap; 13. Multi-angle groove; 14. Pressing plate; 15. Guide column; 16. Indicator plate; 17. Movable port; 18. Pressing spring; 19. Limiting block; 20. Guide plate; 21. Top inclined surface; 22. Side inclined surface; 23. Embedded cylinder; 24. Bending edge; 25. Compression spring; 26. Sliding cavity; 27. Intermediate plate; 28. Mounting base; 29. ​​Tool holder; 30. Chamfering turning tool; 31. X-axis slide; 32. Y-axis slide; 33. Gear; 34. Gear shaft hole; 35. Keyway. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] like Figures 1-8 The gear chamfering device shown includes a main body 1. A rotating chuck 2 is disposed on the rear side of the main body 1. A chamfering tool 30 is mounted on the inner bottom surface of the main body 1 near the front of the rotating chuck 2 via a moving mechanism. A connecting post 3 is fixedly inserted into the front end face of the rotating chuck 2. A connecting cylinder 4 is fixedly connected to the front end face of the connecting post 3. Two symmetrical V-shaped plates 6 are slidably inserted into the two side surfaces of the connecting cylinder 4. A tensioning mechanism is disposed between the two V-shaped plates 6. A threaded rod 11 is threadedly inserted into the front end face of the connecting cylinder 4. A support block 10 is fixedly connected to the rear end of the threaded rod 11. A cap 12 is fixedly connected to the front end of the threaded rod 11. A pressure plate 14 is connected to the rear surface of the cap 12 via a first elastic mechanism. The pressure plate 14 is slidably sleeved on the front end of the connecting cylinder 4. A limit block 19 is connected to the inner side of the pressure plate 14 via a second elastic mechanism. A sharpened part is disposed at the rear end of the limit block 19.

[0019] The gear 33 to be processed in this scheme is a conventional transmission gear structure. The center of the gear 33 has a through-hole 34 for assembly and mating. The inner wall of the gear shaft hole 34 has an integrally formed concave keyway 35. The gear shaft hole 34 is used to coaxially fit with the transmission shaft, and the keyway 35 can be embedded and positioned with the transmission key to effectively transmit torque and meet the needs of the gear 33 for subsequent assembly and transmission with shaft components.

[0020] When arranging gear 33, rotating the cap 12 drives the threaded rod 11 to rotate backward, causing the support block 10 to push outward the V-shaped plates 6 symmetrically arranged on both sides. The V-shaped plates 6 externally support and press against the gear shaft hole 34 of gear 33 for centering and fixing. At the same time, the sharpened part of the limiting block 19 is inserted into the keyway 35 of gear 33 to perform circumferential anti-rotation limiting on gear 33.

[0021] The rotating chuck 2 is a motor-driven three-jaw self-centering chuck, powered by a built-in drive motor, enabling constant-speed forward or reverse rotation. The rotating chuck 2 features automatic centering and stable clamping. Its front end is fixedly connected to a connecting post 3, which acts as a central link and provides a rigid connection. This allows the connecting cylinder 4 and gear 33 to rotate synchronously, coordinating with the feed movement of the chamfering tool 30 to complete the continuous chamfering of the outer edge of the gear 33.

[0022] The moving mechanism includes a Y-axis slide 32 fixedly mounted on the upper surface of the main body 1. An X-axis slide 31 is fixedly mounted on the moving end of the Y-axis slide 32. The Y-axis slide 32 can achieve smooth lateral sliding, while the X-axis slide 31 can achieve precise forward and backward feeding. A mounting base 28 is fixedly mounted on the moving end of the X-axis slide 31. Both the X-axis slide 31 and the Y-axis slide 32 are feed-type precision slides, employing a guide rail slider combined with a lead screw transmission structure. This structure can drive the mounting base 28, the tool holder 29, and the chamfering tool 30 to achieve precise displacement, used to adjust the feed distance between the chamfering tool 30 and the edge of the gear 33, thus achieving precise control of the cutting feed. The tool holder 29 is fixedly connected to the rear surface of the mounting base 28, and the chamfering tool 30 is fixedly mounted on the rear end of the tool holder 29. The chamfering tool 30 is a dedicated gear tool made of carbide, with a chamfered cutting edge machined at the cutting edge to match the tooth tip and tooth root edge of the gear 33.

[0023] The outer surface of the cap 12 is provided with anti-slip texture, which is arranged in a circular array to increase the grip friction and prevent slippage when turning. The front surface of the cap 12 is provided with polygonal grooves 13, which can be used with a special polygonal wrench. It can be manually rotated for adjustment or tightened with the help of tools, adapting to the assembly and locking requirements under different working conditions.

[0024] Two openings 5 ​​are provided on each side surface of the connecting cylinder 4, forming a regular avoidance sliding channel. The two ends of the V-shaped plate 6 slide through the inner side of the opening 5 and can slide smoothly laterally along the opening 5. The rear end of the V-shaped plate 6 is fixedly connected to a guide edge 7, and the rear surface of the guide edge 7 slides in cooperation with the port of the opening 5. The sides of the two V-shaped plates 6 that are close to each other are provided with guide curved surfaces 8, which slide in contact with the rear edge of the support block 10, which is conducive to achieving a smooth pushing and expanding action.

[0025] The tensioning mechanism includes an intermediate plate 27 fixedly connected to the inner rear surface of the connecting cylinder 4. The intermediate plate 27 is centrally located and provides stable support for component installation. Tension springs 9 are fixedly connected to both sides of the intermediate plate 27. The ends of the tension springs 9 that are far apart are fixedly connected to the inner surface of the V-shaped plate 6, and can always pull the V-shaped plate 6 to retract and reset by their own tension.

[0026] The first elastic mechanism includes an embedded cylinder 23 fixedly connected to the front surface of the pressure plate 14. The front end of the embedded cylinder 23 is provided with a bent edge 24. A sliding cavity 26 is opened on the inner side of the cap 12. The bent edge 24 is slidably inserted into the inner side of the sliding cavity 26. A compression spring 25 is provided on the inner side of the sliding cavity 26. The front surface of the bent edge 24 is fixedly connected to the rear end of the compression spring 25. The pre-tight fit is achieved by relying on the spring force to prevent the pressure plate 14 from being pressed too tightly before the cap 12 is rotated backward, which would cause the problem of difficulty in rotation and adjustment.

[0027] The second elastic mechanism includes a guide post 15 fixedly connected to the front surface of the limiting block 19. The front end of the guide post 15 slides through the inner surface of the pressure plate 14. An indicator plate 16 is fixedly connected to the front end of the guide post 15. A movable opening 17 is provided on the front surface of the pressure plate 14 corresponding to the penetration of the guide post 15. The indicator plate 16 is slidably inserted into the inner side of the movable opening 17. The movable opening 17 provides sliding space for the indicator plate 16. A guide plate 20 is fixedly connected to the front of the upper surface of the limiting block 19. The guide plate 20 slides in contact with the inner wall of the cap 12. A clamping spring 18 is sleeved on the outer surface of the guide post 15. The clamping spring 18 is located between the front surface of the limiting block 19 and the inner surface of the pressure plate 14, providing elastic preload.

[0028] The sharpened portion includes a top bevel 21 formed on the upper surface of the limiting block 19, and side bevels 22 formed on both sides of the limiting block 19. The sharpened portion can be smoothly inserted into the keyway 35 of the gear 33 to complete the alignment and positioning. The top bevel 21 and the side bevels 22 can fit against the inner wall of the keyway 35, playing a role in guiding sliding, automatic alignment and limiting fit, thereby improving the smoothness of insertion.

[0029] In use, the gear 33 is fitted onto the outside of the connecting cylinder 4, and then the cap 12 is rotated backward, causing the threaded rod 11 to move backward relative to the connecting cylinder 4, which drives the support block 10 to push and slide the V-shaped plate 6 to both sides. After the V-shaped plate 6 extends out of the through-hole 5, the two V-shaped plates 6 on both sides are respectively attached to the front and rear ends of the gear shaft hole 34 to achieve centering and limiting, so that the gear 33 is stably positioned.

[0030] After the cap 12 is tightened in place, the compression spring 25 pushes the bent edge 24 backward under the action of the spring force, thereby pressing the pressing plate 14 tightly against the front surface of the gear 33; at the same time, the rear end of the limiting block 19 is inserted into the keyway 35, and under the action of the spring force of the pressing spring 18, the limiting block 19 forms a circumferential anti-rotation limit on the gear 33, further improving the positioning stability of the gear 33.

[0031] This solution forms a three-dimensional positioning and locking structure through V-shaped plate 6 for centering and limiting, pressure plate 14 for axial pressing and limiting, and limit block 19 for circumferential anti-rotation limiting, ensuring the stability of gear 33 installation and arrangement; and the overall positioning and locking process can be completed in one go by simply tightening the cap 12, which is simple to operate and convenient to use.

[0032] Before tightening and locking the cap 12, the limiting block 19 must be aligned with the keyway 35. During alignment, when the clamping plate 14 covers the front surface of the gear 33, rotate the clamping plate 14 and observe the indicator plate 16, so that the indicator plate 16 rotates to the position corresponding to the keyway 35. With the guidance of the side inclined surface 22, the rear end of the limiting block 19 can be smoothly inserted into the inside of the keyway 35. After the rear end of the limiting block 19 is inserted into the keyway 35, the top inclined surface 21 abuts against the upper edge of the keyway 35, and the side inclined surface 22 fits against the two sides of the keyway 35, achieving precise positioning. After completing the alignment and positioning, the aforementioned operation of rotating the cap 12 can be performed to complete the overall positioning and locking of the gear 33.

[0033] After gear 33 is fixed, it is driven to rotate by rotating chuck 2. Then, the chamfering tool 30 is moved back and forth by X-axis slide 31 and moved laterally by Y-axis slide 32. The chamfering tool 30 is controlled to reach the edge of gear 33 to perform chamfering of gear 33.

[0034] It should be noted that in this solution, the clamping spring 18 and compression spring 25 only serve to pre-tighten and eliminate backlash, and assist in alignment and fit. They do not bear the main load-bearing force for positioning during the machining process of gear 33. Gear 33 relies on the radial rigid support of V-shaped plate 6, the axial rigid pressing of clamping plate 14, and the circumferential engagement of limiting block 19 and keyway 35 to form a three-dimensional mechanical self-locking. The cutting torque and clamping load are mainly borne by the rigid metal structure of the clamped V-shaped plate 6, which can ensure that the positioning is firm and there is no loosening.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A gear chamfering device, comprising a device body (1), characterized in that: A rotating chuck (2) is provided on the rear side of the main body (1) of the device. A chamfering tool (30) is installed on the inner bottom surface of the main body (1) near the front of the rotating chuck (2) via a moving mechanism. A connecting post (3) is fixedly inserted into the front end face of the rotating chuck (2). A connecting cylinder (4) is fixedly connected to the front end face of the connecting post (3). Two symmetrical V-shaped plates (6) are slidably inserted into the two sides of the connecting cylinder (4). A tensioning mechanism is provided between the two V-shaped plates (6). (4) has a threaded rod (11) inserted into its front end. A support block (10) is fixedly connected to the rear end of the threaded rod (11). A cap (12) is fixedly connected to the front end of the threaded rod (11). A pressure plate (14) is connected to the rear surface of the cap (12) through a first elastic mechanism. The pressure plate (14) is slidably sleeved on the front end of the connecting cylinder (4). A limit block (19) is connected to the inner side of the pressure plate (14) through a second elastic mechanism. A sharpened part is provided at the rear end of the limit block (19). Rotating the cap (12) causes the threaded rod (11) to rotate backward, causing the support block (10) to push outward the V-shaped plates (6) symmetrically arranged on both sides. The V-shaped plates (6) externally support and tighten the gear shaft hole (34) of the gear (33) for centering and fixing. At the same time, the sharpened part of the limiting block (19) is inserted into the keyway (35) of the gear (33) to perform circumferential anti-rotation limiting on the gear (33).

2. The gear chamfering device according to claim 1, characterized in that: The moving mechanism includes a Y-axis slide (32) fixedly installed on the upper surface of the device body (1), an X-axis slide (31) fixedly installed at the moving end of the Y-axis slide (32), a mounting base (28) fixedly installed at the moving end of the X-axis slide (31), a tool holder (29) fixedly connected to the rear surface of the mounting base (28), and a chamfering tool (30) fixedly installed at the rear end of the tool holder (29).

3. The gear chamfering device according to claim 1, characterized in that: The outer surface of the cap (12) is provided with anti-slip texture, and the front surface of the cap (12) is provided with polygonal grooves (13).

4. A gear chamfering device according to claim 1, characterized in that: The connecting cylinder (4) has two openings (5) on each side surface. The two ends of the V-shaped plate (6) slide through the inside of the opening (5). The rear end of the V-shaped plate (6) is fixedly connected to a guide edge (7). The rear surface of the guide edge (7) slides with the port of the opening (5). The two sides of the V-shaped plate (6) that are close to each other have a guide curved surface (8). The guide curved surface (8) slides in contact with the rear edge of the support block (10).

5. A gear chamfering device according to claim 1, characterized in that: The tensioning mechanism includes an intermediate plate (27) fixedly connected to the inner rear surface of the connecting cylinder (4). Tension springs (9) are fixedly connected to both sides of the intermediate plate (27). The ends of the tension springs (9) on both sides that are far apart are fixedly connected to the inner surface of the V-shaped plate (6).

6. A gear chamfering device according to claim 1, characterized in that: The first elastic mechanism includes an embedded cylinder (23) fixedly connected to the front surface of the pressure plate (14). The front end of the embedded cylinder (23) is provided with a bent edge (24). The inner side of the cap (12) is provided with a sliding cavity (26). The bent edge (24) slides into the inner side of the sliding cavity (26). The inner side of the sliding cavity (26) is provided with a compression spring (25). The front surface of the bent edge (24) is fixedly connected to the rear end of the compression spring (25).

7. A gear chamfering device according to claim 1, characterized in that: The second elastic mechanism includes a guide post (15) fixedly connected to the front surface of the limiting block (19). The front end of the guide post (15) slides through the inner surface of the pressing plate (14). An indicator plate (16) is fixedly connected to the front end of the guide post (15). A movable opening (17) is provided on the front surface of the pressing plate (14) corresponding to the penetration of the guide post (15). The indicator plate (16) slides into the inner side of the movable opening (17). A guide plate (20) is fixedly connected to the front of the upper surface of the limiting block (19). The guide plate (20) slides in contact with the inner wall of the screw cap (12). A clamping spring (18) is sleeved on the outer surface of the guide post (15). The clamping spring (18) is located between the front surface of the limiting block (19) and the inner surface of the pressing plate (14).

8. A gear chamfering device according to claim 1, characterized in that: The sharpened part includes a top inclined surface (21) formed on the upper surface of the limiting block (19), and side inclined surfaces (22) are formed on both sides of the limiting block (19).

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