Gear inner hole grinding machining device and method

Abstract

The invention relates to the technical field of inner hole grinding devices, and discloses a gear inner hole grinding device and method.The gear inner hole grinding device comprises a base, a hollow cylinder is fixedly connected to the top of the base, and a grinding table is fixedly mounted at the top of the hollow cylinder and used for containing a to-be-machined gear body; the rotating plates are driven by the three independent power parts to rotate around the axis of the hollow cylinder, the rotating plates are matched with the abutting plates to stretch into the tooth grooves to form three-point supporting, then the two connecting plates are driven by the second driving assembly to be synchronously and symmetrically opened and closed, the limiting plates are made to accurately abut against the edges of the two sides of the tooth grooves, and therefore the tooth grooves can be stably supported. A fixing structure combining three-point supporting and bilateral symmetrical tensioning gear tooth grooves is formed, meanwhile, the friction force is improved through the rough surfaces of the limiting plates, the gear body is forced to be stably locked without radial deviation and circumferential slippage, and the gear inner hole machining device is suitable for machining gear inner holes with different diameters, lengths and tooth shapes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inner hole polishing devices, in particular to a gear inner hole grinding device and method. BACKGROUND

[0002] Generally, the gear inner hole grinding device is a device for finishing the inner hole of gear parts. During the machining process, the gear needs to be accurately positioned and stably clamped by a clamp. The tooth shape engagement clamp is often used in gear machining scenarios without reliable outer circle or end face positioning surface because it can directly use the gear tooth shape as the positioning reference. In actual operation, there are many problems when using the tooth shape engagement clamp for positioning and clamping: The tooth surface engagement gap is too large, and the engaged tooth surface is often worn, which directly causes the tooth skipping phenomenon in engagement transmission, resulting in the instantaneous relative slip of the gear during grinding, disrupting the continuity of the grinding motion, and further causing the inner hole size precision to be out of tolerance and the surface roughness to deteriorate. The radii of different gears differ, and the corresponding tooth block spacing requirements are also different, which requires the customization of special tooth shape engagement clamps for different specifications of gears, increasing production and manufacturing costs and prolonging clamp replacement and debugging time, and seriously reducing production efficiency. Gears also have single and double gears. Single gears have no symmetry center plane, and the tooth shape reference needs to be accurately positioned during machining, otherwise the inner hole and tooth shape coaxiality deviation will easily occur. The existing fixed specification tooth shape engagement clamps cannot simultaneously adapt to the positioning and clamping requirements of single and double gears. SUMMARY

[0003] The present application aims to solve the technical problems in the prior art by providing a gear inner hole grinding device and method.

[0004] The object of the present application can be achieved by the following technical solutions: A gear inner hole grinding device, comprising: A base, a hollow cylinder fixedly connected to the top of the base, a polishing table fixedly installed at the top of the hollow cylinder, the polishing table being used to place a gear body to be machined, three rotating plates being sleeved on the outer cylindrical surface of the hollow cylinder, the three rotating plates being rotatably connected to the hollow cylinder and being sequentially distributed from top to bottom along the axial direction of the hollow cylinder, each rotating plate being driven to rotate by an independent power element, a stand being fixedly installed at one end of each rotating plate, a first driving source being fixedly installed on the stand, an abutting plate being fixedly connected to the movable end of the first driving source, the abutting plate being used to extend into and abut against the tooth groove of the gear body. A fixed block is arranged on the abutment plate, the fixed block is movable along the length direction of the abutment plate, and the fixed block is driven to move by the first driving assembly, two symmetrical connecting plates are rotatably arranged on the fixed block, the two connecting plates are synchronously rotated by the second driving assembly, and one end of the connecting plates away from the fixed block is abutted with the edge of the gear body.

[0005] As a further scheme of the present application, the base is fixedly provided with two symmetrical vertical rods at the top, the vertical rods are fixedly connected with a top plate at the top end, the top plate is slidably provided with a translation plate at the bottom, the translation plate is driven to move by the first output source, the translation plate is provided with a positioning assembly and a grinding assembly at the bottom, and the grinding assembly is away from the gear body when the positioning assembly cooperates with the gear body by driving the translation plate to move by the first output source.

[0006] As a further scheme of the present application, the positioning assembly comprises a first telescopic rod and an inverted tapered table, the first telescopic rod is fixedly arranged on the bottom of the translation plate, the inverted tapered table is fixedly connected with the movable end of the first telescopic rod at the top, the first telescopic rod is used for driving the inverted tapered table to ascend and descend, the diameter of the inverted tapered table decreases along the axis direction downward, the diameter of the bottom end of the inverted tapered table is smaller than the inner hole diameter of the gear body, and the diameter of the top end of the inverted tapered table is larger than the inner hole diameter of the gear body.

[0007] As a further scheme of the present application, the grinding assembly comprises a rotating seat, a moving seat, a second telescopic rod and a grinding machine, the rotating seat is rotatably arranged on the translation plate, the rotating seat is driven to rotate by the second output source arranged in the translation plate, the moving seat is slidably arranged on the bottom of the rotating seat, the moving seat is driven to move by the third output source arranged in the rotating seat, and the moving seat moves along the radial direction of the rotating seat, the second telescopic rod is fixedly arranged on the bottom of the moving seat, the grinding machine is fixedly arranged on the movable end of the second telescopic rod, the second telescopic rod drives the grinding machine to ascend and descend, and the output end of the grinding machine is rotatably arranged with a grinding wheel, and the grinding wheel is used for grinding the inner hole of the gear body.

[0008] As a further scheme of the present application, the one end of each connecting plate away from the fixed block is rotatably arranged with a limiting plate, and the side of the limiting plate facing the edge of the gear body is provided with a rough surface.

[0009] As a further scheme of the present application, the first driving assembly comprises a sliding plate and a threaded rod, the sliding plate is slidably arranged on the abutment plate, the sliding plate moves along the length direction of the abutment plate, the threaded rod is rotatably arranged on the top end of the abutment plate, the threaded rod is driven to rotate by the third driving source fixedly arranged on the abutment plate, the threaded rod is in threaded connection with the sliding plate, and the fixed block is fixedly arranged on the sliding plate.

[0010] As a further aspect of the present invention: the second driving component includes a rack plate and transmission gears. The rack plate is slidably mounted on the top of a sliding plate. The rack plate is driven to move horizontally by a second driving source fixedly mounted on the sliding plate. Two symmetrically arranged transmission gears are rotatably mounted on the top of the fixed block. Each transmission gear is coaxially fixedly connected to the rotating shaft of a connecting plate. The rack plate is located between the two transmission gears, and the rack plate meshes with both transmission gears.

[0011] A method for grinding the inner bore of a gear, the method being applied to a gear inner bore grinding apparatus as described above, the method comprising the following steps: Step S1: Place the gear body to be processed at the preset station of the grinding table. According to the number of teeth and tooth groove specifications of the gear body, initially adjust the initial angle of the three rotating plates to ensure that the abutment plate corresponding to the upright seat on each rotating plate can be accurately aligned with the target tooth groove of the gear body. Step S2: Start the first drive source on each stand, push the abutment plate into the corresponding gear body tooth groove and achieve abutment. Through the initial meshing of the three abutment plates distributed along the axial direction with the tooth groove, the radial movement of the gear body is initially restricted. Step S3: Start the first drive assembly to drive the fixed block to move along the length of the abutment plate, adjust the fitting position of the fixed block in the tooth groove to adapt to the tooth groove depth requirements of gears with different radii, and then start the second drive assembly to drive the two symmetrically arranged connecting plates to rotate synchronously, so that the end of the connecting plate away from the fixed block is tightly abutted against the edge of the tooth groove of the gear body. Step S4: After the inner hole grinding is completed, first control the second drive assembly to drive the connecting plate to rotate in the opposite direction, release the connecting plate from the edge of the tooth groove, drive the fixing block to reset through the first drive assembly, and then start the first drive source to drive the abutment plate to exit from the tooth groove, so that the processed gear body can be removed from the grinding table, completing a single processing flow.

[0012] The beneficial effects of this invention are: 1. In this invention, three independent power components drive the rotating plate to rotate around the axis of the hollow cylinder, which, together with the abutment plate extending into the tooth groove, forms a three-point support. Then, the second drive component drives the two connecting plates to open and close synchronously and symmetrically, so that the limiting plate accurately abuts against the two sides of the tooth groove, forming a fixed structure of three-point support combined with double-sided symmetrical tensioning of the gear tooth groove. At the same time, the rough surface of the limiting plate increases the friction force, forcing the gear body to be stably locked without radial offset or circumferential slippage. It is suitable for machining the inner hole of gears with different diameters, lengths and tooth shapes, avoiding the problem of gear movement caused by gaps between the clamp and the gear due to changes in gear specifications in traditional clamping, and ensuring that the roundness and coaxiality accuracy of the inner hole grinding meet the standards. 2. In this invention, the conical surface structure of the inverted conical platform is in surface contact with the inner hole of the gear. During the descent, the placement position of the gear body can be automatically corrected by the guiding effect of the conical surface, forcing the axis of the inner hole of the gear to remain coaxial with the axis of the hollow cylinder, eliminating the coaxiality deviation of manual placement, and providing a precise reference for subsequent inner hole grinding. Moreover, the bottom diameter of the inverted conical platform is smaller than the minimum inner hole diameter of the gear being processed, and the top diameter is larger than the maximum inner hole diameter of the gear being processed. There is no need to replace the positioning components. The centering operation of gear bodies with different inner hole diameters can be adapted simply by adjusting the lifting stroke of the first telescopic rod. 3. In this invention, the connecting plate opens and closes synchronously through the meshing transmission of the rack plate and two transmission gears, ensuring that the clamping force is uniform and symmetrical. The first drive component of the threaded transmission has self-locking properties, which can prevent displacement after adjustment. Furthermore, the locking effect of the rack plate on the transmission gears further restricts the rotation of the gear body, reducing the risk of accidental displacement of the gears during the grinding process. Attached Figure Description

[0013] The invention will now be further described with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure for the movement of the translation plate in this invention; Figure 3 This is a schematic diagram of the abutment plate in this invention; Figure 4 This is a schematic diagram of the structure in this invention where the abutment plate and the sliding plate are separated; Figure 5 This is a schematic diagram of the structure in which the limiting plate and the gear body are attached in this invention; Figure 6 This is a schematic diagram of the translation plate in this invention; Figure 7 This is a schematic diagram of the hollow cylinder structure in this invention; Figure 8 This is a schematic diagram of the rotating plate in this invention.

[0015] In the diagram: 1. Base; 2. Hollow cylinder; 3. Grinding table; 4. Gear body; 5. Rotating plate; 6. Stand; 7. First drive source; 8. Abutment plate; 9. Sliding plate; 10. Fixing block; 11. Connecting plate; 12. Limiting plate; 13. Transmission gear; 14. Rack plate; 15. Second drive source; 16. Threaded rod; 17. Third drive source; 18. Upright pole; 19. Top plate; 20. Translation plate; 21. First telescopic rod; 22. Inverted conical platform; 23. Rotating seat; 24. Moving seat; 25. Second telescopic rod; 26. Grinding machine; 27. Grinding wheel. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-8 As shown, the present invention is a gear internal hole grinding apparatus, comprising: A base 1 has a hollow cylinder 2 fixedly connected to its top. A grinding table 3 is fixedly installed on the top of the hollow cylinder 2. The grinding table 3 is used to place the gear body 4 to be processed. Three rotating plates 5 are sleeved on the outer circumference of the hollow cylinder 2. The three rotating plates 5 are rotatably connected to the hollow cylinder 2 and are distributed from top to bottom along the axial direction of the hollow cylinder 2. Each rotating plate 5 is driven to rotate by an independent power component. A stand 6 is fixedly installed at one end of each rotating plate 5. A first driving source 7 is fixedly installed on the stand 6. An abutment plate 8 is fixedly connected to the movable end of the first driving source 7. The abutment plate 8 is used to extend into and abut against the tooth groove of the gear body 4. A fixing block 10 is disposed on the abutment plate 8. The fixing block 10 can move along the length direction of the abutment plate 8 and is driven to move by a first driving component. Two symmetrically arranged connecting plates 11 are rotatably mounted on the fixing block 10. The two connecting plates 11 are driven to rotate synchronously by a second driving component. The end of the connecting plate 11 away from the fixing block 10 abuts against the tooth groove edge of the gear body 4.

[0018] In one embodiment, the first driving source 7 can be an electric cylinder, an electric telescopic rod, or other mechanisms capable of linear reciprocating motion. This embodiment does not impose specific limitations on these components. The power component can be a motor-driven gear meshing transmission assembly, a motor-driven synchronous belt transmission assembly, or other mechanisms capable of rotary motion. This embodiment does not impose specific limitations on these components.

[0019] The working principle of this invention: Initial positioning stage: The gear body 4 to be processed is placed on the grinding table 3, so that the inner hole of the gear is coaxial with the axis of the hollow cylinder 2. According to the tooth groove distribution angle and size of the gear body 4, the independent power components corresponding to the three rotating plates 5 are activated to drive the rotating plates 5 to rotate around the axis of the hollow cylinder 2. The circumferential positions of the three stands 6 and the first drive source 7 are adjusted to ensure that the abutment plate 8 on each stand 6 can be aligned with a tooth groove of the gear body 4. First, the three rotating plates 5 are all equipped with abutment plates 8 that can accurately clamp and limit the gear body 4, as well as other fixing components on the abutment plates 8. This is similar to a three-jaw clamping structure, which can ensure that the gear body 4 is stably clamped. According to the specifications of the gear body 4 to be processed, according to different radii, odd or even tooth shapes, the rotation adjustment of the three rotating plates 5 can always ensure that the abutment plate 8 can be accurately inserted into the tooth groove. At this time, it is like Figure 5 Taking the example shown; the specific clamping and fixing stage: the first drive source 7 is activated, driving the abutment plate 8 to move radially along the gear until the abutment plate 8 precisely extends into the corresponding tooth groove, completing the initial positioning, forming three-point support for the gear body 4 from inside the tooth groove, preventing the gear body 4 from radially shifting during the grinding process; the clamping and fixing stage: the first drive assembly is activated, driving the fixing block 10 to move along the length direction of the abutment plate 8, adjusting the position of the two connecting plates 11 so that they correspond to the edge position of the tooth groove; then the second drive assembly is activated, driving the two connecting plates 11 to rotate synchronously until the two connecting plates 11 abut against the two sides of the tooth groove respectively; at this time, the abutment plate 8 supports and double... The side connecting plate 11 clamps the fixed structure, and the three tooth grooves are fixed together to achieve complete locking of the gear body 4. In the grinding process: after the gear body 4 is clamped, the grinding head of the external grinding equipment can pass through the hollow cylinder 2 and extend into the inner hole of the gear to perform high-precision grinding on the inner hole of the gear. It should be noted that if the gear angle needs to be adjusted during the processing, the power component can be started to drive the three rotating plates 5 to rotate synchronously, thereby driving the gear body 4 to rotate synchronously. After the inner hole grinding is completed, the second drive component is first controlled to drive the connecting plate 11 to rotate in the opposite direction to release the clamping on the edge of the tooth groove. Then, the first drive source 7 is controlled to drive the abutment plate 8 to exit the tooth groove, and the processed gear body 4 can be removed from the grinding table 3.

[0020] like Figures 1-6 As shown, in a preferred embodiment of the present invention, two symmetrically arranged uprights 18 are fixedly installed on the top of the base 1. A top plate 19 is fixedly connected to the top of the uprights 18. A translation plate 20 is slidably installed on the bottom of the top plate 19. The translation plate 20 is driven to move by a first output source. A positioning component and a grinding component are provided at the bottom of the translation plate 20. When the first output source drives the translation plate 20 to move so that the positioning component engages with the gear body 4, the grinding component moves away from the gear body 4.

[0021] In one embodiment, the first output source can be an electric cylinder, an electric telescopic rod, a track translation assembly, or other mechanisms capable of linear reciprocating motion. This embodiment does not impose specific limitations on these mechanisms.

[0022] In practical application, when the gear body 4 needs to be centered and positioned, the first output source drives the translation plate 20 to move the positioning component to directly above the gear. At this time, the grinding component moves with the translation plate 20 to a position away from the gear to prevent the grinding component from colliding with the positioning component and the gear body 4, thus ensuring the stability of the centering process. After centering is completed, the first output source drives the translation plate 20 in the opposite direction to move the grinding component to directly above the gear for grinding operations, while the positioning component moves to the side to wait.

[0023] like Figures 1-6 As shown, in a preferred embodiment of the present invention, the positioning component includes a first telescopic rod 21 and an inverted conical platform 22. The first telescopic rod 21 is fixedly installed at the bottom of the translation plate 20. The top of the inverted conical platform 22 is fixedly connected to the movable end of the first telescopic rod 21. The first telescopic rod 21 is used to drive the inverted conical platform 22 to rise and fall. The diameter of the inverted conical platform 22 decreases downward along its axial direction, and the bottom diameter of the inverted conical platform 22 is smaller than the inner diameter of the gear body 4, while the top diameter of the inverted conical platform 22 is larger than the inner diameter of the gear body 4.

[0024] In one embodiment, it should be noted that the first telescopic rod 21 described in this invention is prior art, and this invention does not improve upon it. Therefore, it is not necessary to disclose its specific mechanical and circuit structures, and this does not affect the integrity of this invention. In practical application of this embodiment, during centering operations, the first telescopic rod 21 drives the inverted conical platform 22 to descend. Since its bottom diameter is smaller than the inner diameter of the gear, it can be easily inserted into the inner hole. As the inverted conical platform 22 continues to descend, the gradually increasing diameter conical surface fits tightly against the inner hole wall. Utilizing the guiding and tensioning effect of the conical surface, the placement position of the gear body 4 is automatically corrected, achieving precise centering. Subsequently, the rotation angle of each rotating plate 5 is adjusted so that the abutment plate 8 on each stand 6 is aligned with the tooth groove position of the gear body 4. Then, the process of clamping and fixing the gear body 4 is carried out. In this way, the positioning and clamping of the gear body 4 can be completed quickly.

[0025] like Figures 1-6As shown, in a preferred embodiment of the present invention, the grinding assembly includes a rotating seat 23, a movable seat 24, a second telescopic rod 25, and a grinding machine 26. The rotating seat 23 is rotatably mounted on the translation plate 20 and is driven to rotate by a second output source built into the translation plate 20. The movable seat 24 is slidably mounted on the bottom of the rotating seat 23 and is driven to move by a third output source built into the rotating seat 23, and moves along the radial direction of the rotating seat 23. The second telescopic rod 25 is fixedly mounted on the bottom of the movable seat 24. The grinding machine 26 is fixedly mounted on the movable end of the second telescopic rod 25 and the second telescopic rod 25 drives the grinding machine 26 to move up and down. A grinding wheel 27 is rotatably mounted on the output end of the grinding machine 26, and the grinding wheel 27 is used to grind the inner hole of the gear body 4.

[0026] In one embodiment, the second output source can be a servo motor, a servo motor or other components, or other mechanisms capable of achieving rotational motion. The third output source can be an electric cylinder, an electric telescopic rod or other components, or other mechanisms capable of achieving linear reciprocating motion. This embodiment does not impose specific limitations on these components. It should be noted that the second telescopic rod 25 described in this invention is prior art, and this invention does not improve upon it. Therefore, it is not necessary to disclose its specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0027] In practical application, during grinding operations, the grinding machine 26 drives the grinding wheel 27 to rotate rapidly, which can grind the inner wall of the gear body 4. The second output source drives the rotating seat 23 to rotate, which can drive the grinding wheel 27 to rotate circumferentially around the gear inner hole axis, achieving uniform grinding of the entire circumference of the inner hole. The third output source drives the moving seat 24 to move radially along the rotating seat 23, which can adjust the radial feed of the grinding wheel 27 to adapt to gear inner holes of different diameters without changing the grinding components. The second telescopic rod 25 drives the grinding machine 26 to rise and fall, which can drive the grinding wheel 27 to move along the inner hole axis, achieving grinding of the entire length of the inner hole. It can perform all-round, high-precision grinding of gear inner holes of different diameters and lengths, and is also suitable for different types of gears, such as odd and even numbers.

[0028] like Figures 1-5 As shown, in a preferred embodiment of the present invention, each of the connecting plates 11 is rotatably mounted with a limiting plate 12 at the end away from the fixing block 10, and the side of the limiting plate 12 facing the edge of the tooth groove of the gear body 4 is set as a rough surface.

[0029] In practical application, when the connecting plate 11 drives the limiting plate 12 to abut against the edge of the tooth groove of the gear body 4, the rough surface can greatly increase the friction between the limiting plate 12 and the edge of the tooth groove, preventing the gear body 4 from slipping relative to each other due to the grinding force during the grinding process, and avoiding the occurrence of tooth skipping. At the same time, the limiting plate 12 adopts a rotating installation method, which can automatically adjust the fitting posture according to the angle of the tooth groove edge, ensuring full contact between the rough surface and the tooth groove edge, further improving the friction and clamping stability.

[0030] like Figures 1-5 As shown, in a preferred embodiment of the present invention, the first driving assembly includes a sliding plate 9 and a threaded rod 16. The sliding plate 9 is slidably mounted on the abutment plate 8 and moves along the length of the abutment plate 8. The threaded rod 16 is rotatably mounted on the top of the abutment plate 8 and is driven to rotate by a third driving source 17 fixedly mounted on the abutment plate 8. The threaded rod 16 is threadedly connected to the sliding plate 9, and the fixing block 10 is fixedly mounted on the sliding plate 9.

[0031] In one embodiment, the third drive source 17 may be a servo motor, a servo motor or other components, or other mechanisms capable of rotational motion. This embodiment does not impose specific limitations on this.

[0032] In practical application, the third drive source 17 is activated to drive the threaded rod 16 to rotate. Since the threaded rod 16 is threadedly connected to the sliding plate 9, and the sliding plate 9 is restricted to sliding along the length direction on the abutment plate 8, the rotational motion of the threaded rod 16 can be converted into the linear movement of the sliding plate 9, thereby driving the fixed block 10 and the connecting plate 11 to move along the length direction of the abutment plate 8, adjusting the contact position between the connecting plate 11 and the gear tooth groove, ensuring that the limiting plate 12 can accurately abut against the edge of the tooth groove of gears with different radii. The threaded transmission has the characteristics of high adjustment accuracy and good self-locking, which can realize the precise positioning of the sliding plate 9, avoid displacement after adjustment, and ensure clamping stability.

[0033] like Figures 1-5 As shown, in a preferred embodiment of the present invention, the second driving assembly includes a rack plate 14 and a transmission gear 13. The rack plate 14 is slidably mounted on the top of the sliding plate 9. The rack plate 14 is driven to move horizontally by a second driving source 15 fixedly mounted on the sliding plate 9. Two symmetrically arranged transmission gears 13 are rotatably mounted on the top of the fixed block 10. Each transmission gear 13 is coaxially fixedly connected to the rotating shaft of a connecting plate 11. The rack plate 14 is located between the two transmission gears 13, and the rack plate 14 meshes with both transmission gears 13.

[0034] In one embodiment, the second drive source 15 may be an electric cylinder, an electric telescopic rod, or other components that can achieve linear reciprocating motion. This embodiment does not impose specific limitations on these components.

[0035] In practical application, the second drive source 15 is activated to drive the rack plate 14 to move horizontally. Since the rack plate 14 meshes with two symmetrically arranged transmission gears 13, the linear movement of the rack plate 14 can drive the two transmission gears 13 to rotate synchronously in opposite directions, thereby driving the two connecting plates 11 to open and close synchronously and symmetrically. This synchronous transmission structure ensures that the rotation angles of the two connecting plates 11 are completely consistent, making the contact force of the limiting plate 12 against the edge of the gear tooth groove uniform and symmetrical, avoiding gear deformation or positioning offset due to uneven clamping force. At the same time, by adjusting the rack plate 14... The moving distance can precisely control the rotation angle of the connecting plate 11, so that the limiting plate 12 is tightly abutted against the edge of the tooth groove, eliminating the meshing gap of the tooth surface, avoiding the phenomenon of skipping teeth during grinding, ensuring the continuity of grinding motion, improving the machining accuracy of the inner hole, and the rack plate 14 has a locking effect on the transmission gear 13, which can indirectly lock the gear body 4. Because the rotation of the gear body 4 will drive the limiting plate 12 and the connecting plate 11 to rotate, but since the transmission gear 13 is locked by the rack plate 14, the connecting plate 11 is also locked, thus restricting the rotation of the gear body 4.

[0036] Please see Figures 1-8 As shown, the present invention provides a method for grinding the inner bore of a gear. The method is applied to a gear inner bore grinding apparatus as described in the above embodiments, and includes the following steps: Step S1: Place the gear body 4 to be processed at the preset position of the grinding table 3. According to the number of teeth and tooth groove specifications of the gear body 4, initially adjust the initial angle of the three rotating plates 5 to ensure that the abutment plate 8 corresponding to the stand 6 on each rotating plate 5 can be accurately aligned with the target tooth groove of the gear body 4. Step S2: Start the first drive source 7 on each stand 6, push the abutment plate 8 into the tooth groove of the corresponding gear body 4 and achieve abutment. Through the initial meshing of the three abutment plates 8 distributed along the axial direction with the tooth groove, the radial movement of the gear body 4 is initially restricted. Step S3: Start the first drive assembly to drive the fixed block 10 to move along the length of the abutment plate 8, adjust the fitting position of the fixed block 10 in the tooth groove to adapt to the tooth groove depth requirements of gears with different radii, and then start the second drive assembly to drive the two symmetrically arranged connecting plates 11 to rotate synchronously, so that the end of the connecting plate 11 away from the fixed block 10 is tightly abutted against the edge of the tooth groove of the gear body 4. Step S4: After the inner hole grinding is completed, first control the second drive assembly to drive the connecting plate 11 to rotate in the opposite direction, release the connection plate 11 from the edge of the tooth groove, drive the fixing block 10 to reset through the first drive assembly, and then start the first drive source 7 to drive the abutment plate 8 to exit from the tooth groove, so that the processed gear body 4 can be removed from the grinding table 3, completing a single processing flow.

[0037] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A gear internal hole grinding apparatus, characterized in that, include: A base (1) is fixedly connected to a hollow cylinder (2) at the top of the base (1). A grinding table (3) is fixedly installed on the top of the hollow cylinder (2). The grinding table (3) is used to place the gear body (4) to be processed. Three rotating plates (5) are sleeved on the outer circular surface of the hollow cylinder (2). The three rotating plates (5) are rotatably connected to the hollow cylinder (2). The three rotating plates (5) are distributed from top to bottom along the axial direction of the hollow cylinder (2). Each rotating plate (5) is driven to rotate by an independent power component. A stand (6) is fixedly installed at one end of each rotating plate (5). A first driving source (7) is fixedly installed on the stand (6). An abutment plate (8) is fixedly connected to the movable end of the first driving source (7). The abutment plate (8) is used to extend into and abut against the tooth groove of the gear body (4). A fixing block (10) is disposed on the abutment plate (8). The fixing block (10) can move along the length direction of the abutment plate (8). The fixing block (10) is driven to move by the first driving component. Two symmetrically arranged connecting plates (11) are rotatably mounted on the fixing block (10). The two connecting plates (11) are driven to rotate synchronously by the second driving component. The end of the connecting plate (11) away from the fixing block (10) abuts against the tooth groove edge of the gear body (4).

2. The gear internal hole grinding apparatus according to claim 1, characterized in that, The base (1) has two symmetrically arranged uprights (18) fixedly installed on its top. The top of the uprights (18) is fixedly connected to a top plate (19). A sliding plate (20) is slidably installed on the bottom of the top plate (19). The sliding plate (20) is driven to move by a first output source. The bottom of the sliding plate (20) is provided with a positioning component and a grinding component. When the first output source drives the sliding plate (20) to move so that the positioning component engages with the gear body (4), the grinding component moves away from the gear body (4).

3. The gear internal hole grinding apparatus according to claim 2, characterized in that, The positioning component includes a first telescopic rod (21) and an inverted conical platform (22). The first telescopic rod (21) is fixedly installed at the bottom of the translation plate (20). The top of the inverted conical platform (22) is fixedly connected to the movable end of the first telescopic rod (21). The first telescopic rod (21) is used to drive the inverted conical platform (22) to rise and fall. The diameter of the inverted conical platform (22) decreases downward along its axial direction. The bottom diameter of the inverted conical platform (22) is smaller than the inner diameter of the gear body (4), and the top diameter of the inverted conical platform (22) is larger than the inner diameter of the gear body (4).

4. The gear internal hole grinding apparatus according to claim 3, characterized in that, The grinding assembly includes a rotating seat (23), a movable seat (24), a second telescopic rod (25), and a grinding machine (26). The rotating seat (23) is rotatably mounted on a translation plate (20). The rotating seat (23) is driven to rotate by a second output source built into the translation plate (20). The movable seat (24) is slidably mounted on the bottom of the rotating seat (23). The movable seat (24) is driven to move by a third output source built into the rotating seat (23), and the movable seat (24) moves along the radial direction of the rotating seat (23). The second telescopic rod (25) is fixedly mounted on the bottom of the movable seat (24). The grinding machine (26) is fixedly mounted on the movable end of the second telescopic rod (25). The second telescopic rod (25) drives the grinding machine (26) to rise and fall. A grinding wheel (27) is rotatably mounted on the output end of the grinding machine (26). The grinding wheel (27) is used to grind the inner hole of the gear body (4).

5. The gear internal hole grinding apparatus according to claim 1, characterized in that, Each of the connecting plates (11) has a limiting plate (12) rotatably mounted on one end away from the fixing block (10), and the limiting plate (12) is roughened on the side facing the edge of the tooth groove of the gear body (4).

6. The gear internal hole grinding apparatus according to claim 5, characterized in that, The first driving assembly includes a sliding plate (9) and a threaded rod (16). The sliding plate (9) is slidably mounted on the abutment plate (8). The sliding plate (9) moves along the length of the abutment plate (8). The threaded rod (16) is rotatably mounted on the top of the abutment plate (8). The threaded rod (16) is driven to rotate by a third driving source (17) fixedly mounted on the abutment plate (8). The threaded rod (16) is threadedly connected to the sliding plate (9). The fixing block (10) is fixedly mounted on the sliding plate (9).

7. The gear internal hole grinding apparatus according to claim 6, characterized in that, The second drive assembly includes a rack plate (14) and a transmission gear (13). The rack plate (14) is slidably mounted on the top of the sliding plate (9). The rack plate (14) is driven to move horizontally by a second drive source (15) fixedly mounted on the sliding plate (9). Two symmetrically arranged transmission gears (13) are rotatably mounted on the top of the fixed block (10). Each transmission gear (13) is coaxially fixedly connected to the rotating shaft of a connecting plate (11). The rack plate (14) is located between the two transmission gears (13), and the rack plate (14) meshes with both transmission gears (13).

8. A method for grinding the inner bore of a gear, characterized in that, The method is applied to a gear internal hole grinding apparatus as described in any one of claims 1-7, and the method includes the following steps: Step S1: Place the gear body (4) to be processed at the preset position of the grinding table (3). According to the number of teeth and tooth groove specifications of the gear body (4), adjust the initial angle of the three rotating plates (5) to ensure that the abutment plate (8) corresponding to the stand (6) on each rotating plate (5) can be accurately aligned with the target tooth groove of the gear body (4). Step S2: Start the first drive source (7) on each stand (6) to push the abutment plate (8) into the tooth groove of the corresponding gear body (4) and achieve abutment. Through the initial meshing of the three abutment plates (8) distributed along the axial direction with the tooth groove, the radial movement of the gear body (4) is initially restricted. Step S3: Start the first drive assembly, drive the fixed block (10) to move along the length direction of the abutment plate (8), adjust the fitting position of the fixed block (10) in the tooth groove to adapt to the tooth groove depth requirements of gears with different radii, and then start the second drive assembly to drive the two symmetrically arranged connecting plates (11) to rotate synchronously, so that the end of the connecting plate (11) away from the fixed block (10) is tightly abutted against the edge of the tooth groove of the gear body (4); Step S4: After the inner hole grinding is completed, first control the second drive assembly to drive the connecting plate (11) to rotate in the opposite direction, release the connection plate (11) from the edge of the tooth groove, drive the fixing block (10) to reset through the first drive assembly, and then start the first drive source (7) to drive the abutment plate (8) to exit from the tooth groove, so that the processed gear body (4) can be removed from the grinding table (3) to complete the single processing process.

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