Grinding device for inner hole of chain wheel

Abstract

The invention discloses a chain wheel inner hole grinding device, and relates to the technical field of machining. The device comprises a machining table, a positioning seat is fixedly connected to the top of the machining table, and a grinding mechanism is fixedly connected to the rear end of the top of the machining table. According to the grinding mechanism, a first motor is started through a PLC, the first motor drives a first gear to rotate, the first gear drives a second gear to rotate, the second gear drives a first threaded rod to rotate, and the first threaded rod drives a movable seat to move, so that the transverse horizontal movement mode of the grinding mechanism can be adjusted; the first air cylinder drives the mounting frame to move, the mounting frame drives the second air cylinder to move, the second air cylinder drives the connecting block to move, the connecting block drives the grinding machine to move, and through cooperation of the first air cylinder and the second air cylinder, the grinding mechanism can move in the longitudinal and vertical directions, and the grinding position can be flexibly adjusted conveniently; and therefore, the using effect of the polishing device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a sprocket inner hole grinding device. Background Art

[0002] In the field of modern mechanical transmission, sprockets play a vital role and are widely used in power transmission systems in many industries such as automobiles, motorcycles, industrial conveyors, and automated production lines. The quality of the sprocket inner hole is directly related to the matching accuracy between the sprocket and the shaft, which in turn has a significant impact on the performance of the entire transmission system. The traditional sprocket inner hole grinding process has long had many defects that are difficult to overcome.

[0003] Although the existing grinding equipment can achieve a certain degree of automated grinding, its adjustment process is relatively complicated when facing sprockets of different specifications, and it is impossible to quickly position sprockets of different specifications. At the same time, the processing of debris generated by grinding is not perfect. A large amount of debris accumulates in the grinding area, which is prone to scratches and reduces the processing quality of the workpiece.

[0004] To this end, we provide a sprocket inner hole grinding device to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a sprocket inner hole grinding device, which solves the problem in the prior art that although the existing grinding equipment can achieve a certain degree of automated grinding, when facing sprockets of different specifications, its adjustment process is relatively complicated, and it is impossible to quickly position the sprockets of different specifications. At the same time, the processing of debris generated by grinding is not perfect, a large amount of debris accumulates in the grinding area, scratches are likely to occur, and the processing quality of the workpiece is reduced.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a sprocket inner hole grinding device, comprising a processing table, the top of the processing table is fixedly connected with a positioning seat, the rear end of the top of the processing table is fixedly connected with a grinding mechanism, the four corners of the bottom of the processing table are fixedly connected with columns, the bottom of the column is fixedly connected with a bottom plate, the rear end of the top of the bottom plate is fixedly connected with a dust removal mechanism, and the inner cavity of the processing table is fixedly connected with a locking mechanism; The grinding mechanism includes a shell, a left side of the shell is fixedly connected to the processing table, a right side of the shell is fixedly connected to a first motor, an output end of the first motor is fixedly connected to a first gear, an inner cavity of the shell is movably connected to a second gear through a bearing, the second gear is meshed with the first gear, a first threaded rod is fixedly connected to one side of the second gear, a side of the first threaded rod away from the second gear penetrates the inner cavity of the shell and extends to the inner cavity of the processing table, a surface of the first threaded rod is threadedly connected to a moving seat, a shell is fixedly connected to the top of the moving seat, a first cylinder is fixedly connected to the bottom of the inner cavity of the shell, a mounting bracket is fixedly connected to the top of the first cylinder, a second cylinder is fixedly connected to the bottom of the mounting bracket, a connecting block is fixedly connected to the front end of the second cylinder, and a grinder is fixedly connected to the bottom of the connecting block; The dust removal mechanism includes a vacuum cleaner, the bottom of which is fixedly connected to the top of the bottom plate, the top of which is connected to a connection cover, the top of which is connected to a hose, the top of which passes through the bottom of the movable seat and extends to the top of the movable seat, one side of the hose is connected to a dust cover, and one side of the dust cover extends to the rear end of the positioning seat; The locking mechanism includes a second motor, the bottom of the second motor is fixedly connected to the inner cavity of the processing table, the output end of the second motor is fixedly connected to the second threaded rod, the bottom of the inner cavity of the processing table and the outer side of the second motor is fixedly connected to a fixing frame, the top of the second threaded rod passes through the bottom of the fixing frame and extends to the top of the fixing frame, the top of the surface of the second threaded rod is threadedly connected to a connecting seat, both sides of the top of the fixing frame are fixedly connected to fixing blocks, the surface of the fixing block is movably connected to the movable frame through a rotating shaft, the opposite sides of the two movable frames are movably connected to a connecting rod through a rotating shaft, the side of the connecting rod away from the movable frame is movably connected to the connecting seat through a rotating shaft, the top of the movable frame is movably connected to a mounting block through a rotating shaft, the top of the mounting block passes through the inner cavity of the processing table and extends to the top of the processing table, and the top of the mounting block is movably connected to a limiting clamp through a rotating shaft.

[0007] By adopting the above technical scheme, through the control system of the PLC controller and the grinding mechanism, it can be ensured that the grinding head can move in the radial and axial directions in the inner hole of the sprocket with high precision, so that the grinding uniformity of each part of the inner hole is extremely high, which can effectively avoid the situation of local excessive or insufficient grinding, and significantly improve the smoothness and cylindricity of the inner hole. At the same time, the use of two groups of grinding heads with different mesh sizes can further improve the grinding accuracy of the grinding device. The dust removal mechanism can timely and effectively absorb the debris generated in the grinding process, which not only avoids the secondary scratches on the surface of the inner hole by the debris, but also prevents the debris from entering the interior of the equipment, reduces the wear rate of key components of the equipment, reduces the occurrence rate of equipment failures, extends the service life of the equipment, and reduces equipment maintenance costs and production downtime.

[0008] The present invention is further configured such that one side of the limit clamp is provided with teeth adapted to the sprocket gear, and the limit clamp is a disassembly structure.

[0009] By adopting the above technical solution, the stability of the sprocket fixation can be ensured by the teeth that are adapted to the sprocket gear. At the same time, the limiting clamp is a replaceable and detachable structure, which can be adapted and selected according to different sprocket sizes.

[0010] The present invention is further configured such that a dust cover is fixedly connected to the top of the processing table, and the dust cover is arranged on the outer side of the positioning seat.

[0011] By adopting the above technical solution, the dustproof effect can be improved through the dustproof cover, so as to prevent the dust generated during the grinding process from falling on the outside of the processing table, thereby improving the environmental protection effect of production.

[0012] The present invention is further configured such that positioning holes are provided at four corners of the top of the positioning seat, positioning columns are fixedly connected to the four corners of the top of the processing table, and the positioning columns extend to the inner cavity of the positioning holes.

[0013] By adopting the above technical solution, the positioning seat can be installed through the positioning holes and the positioning columns, thereby ensuring the stability of the installation of the positioning seat.

[0014] The present invention is further configured such that a cleaning cover is provided at the bottom of the surface of the vacuum cleaner, and an air outlet is provided at the top of the surface of the vacuum cleaner.

[0015] By adopting the above technical solution, the staff can clean the dust inside the vacuum cleaner conveniently by cleaning the cover plate, and the purpose of exhausting the dust can be achieved through the air outlet.

[0016] The present invention is further configured such that a slide groove is provided at the top of the rear end of the processing table, a slider is fixedly connected to the bottom of one side of the movable seat, and the slider is slidably connected to the slide groove.

[0017] By adopting the above technical solution, the movable seat can be limited by the sliding groove and the sliding block, thereby ensuring the stability of the movable seat during movement.

[0018] The present invention is further configured such that a PLC controller is fixedly connected to the left side of the bottom of the processing table, and the PLC controller is electrically connected to the first motor, the second motor, the first cylinder and the second cylinder respectively through wires.

[0019] By adopting the above technical solution, the start and stop of the first motor, the second motor, the first cylinder and the second cylinder can be controlled by the PLC controller, thereby achieving the purpose of convenient control.

[0020] The present invention is further configured such that the grinder comprises two groups of grinding heads, which are respectively driven by two groups of motors, and the mesh sizes of the grinding heads are different.

[0021] By adopting the above technical solution, a grinder is used with two sets of grinding heads, and the grinding accuracies are different to meet different processing requirements.

[0022] The present invention is further configured such that four corners of the bottom of the base plate are fixedly connected with support columns, and the bottoms of the support columns are fixedly connected with cushion blocks.

[0023] By adopting the above technical solution, the bottom plate can be supported by the support columns and the pads, while the overall stability of the device can be ensured.

[0024] The present invention is further configured such that limiting grooves are provided on both sides of the inner cavity of the mounting frame, limiting blocks are fixedly connected to both sides of the connecting block, and the limiting blocks and the limiting grooves are slidably connected.

[0025] By adopting the above technical solution, the connection block can be limited by the limiting groove and the limiting block, thereby ensuring the stability of the connection block during movement.

[0026] The present invention has the following beneficial effects: The present invention starts the first motor through a PLC controller, the first motor drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the first threaded rod to rotate, the first threaded rod drives the moving seat to move, so that the lateral horizontal movement mode of the grinding mechanism can be adjusted, and the first cylinder is started through the PLC controller, the first cylinder drives the mounting frame to move, the mounting frame drives the second cylinder to move, the second cylinder drives the connecting block to move, and the connecting block drives the grinder to move. Through the cooperation of the first cylinder and the second cylinder, the longitudinal and vertical movement directions of the grinding mechanism can be realized, which is convenient for flexible adjustment of the grinding position, thereby improving the use effect of the grinding device.

[0027] The present invention starts the vacuum cleaner, and the negative pressure airflow generated by the vacuum cleaner enters the interior of the hose through the connecting cover, and the dust debris generated by grinding is collected by the dust hood, and the debris is recovered to the interior of the vacuum cleaner through the dust hood, so that the debris generated in the grinding process can be sucked away in time, avoiding the influence of the debris on the surface quality of the inner hole and the wear of the equipment.

[0028] The present invention places a sprocket above the positioning seat, starts the second motor through a PLC controller, the second motor drives the second threaded rod to rotate, the second threaded rod drives the connecting seat to move, the connecting seat drives the connecting rod to move, the connecting rod drives the movable frame to contract, the movable frame drives the mounting block to move, the mounting block drives the limiting clamp to move, the teeth on one side of the limiting clamp can mesh with the teeth on the surface of the sprocket, so as to achieve the purpose of efficient positioning, and the limiting clamp can be replaced according to the size of the sprocket to achieve a more convenient positioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0030] Figure 1 It is a structural stereogram of a sprocket inner hole grinding device; Figure 2 It is a rear perspective view of a sprocket inner hole grinding device structure; Figure 3 It is a three-dimensional diagram of a grinding mechanism in a sprocket inner hole grinding device; Figure 4 It is a cross-sectional view of a mounting frame in a sprocket inner hole grinding device; Figure 5 It is a cross-sectional view of a housing in a sprocket inner hole grinding device; Figure 6 It is a three-dimensional diagram of a locking mechanism in a sprocket inner hole grinding device; Figure 7 A three-dimensional diagram of a dust cover in a sprocket inner hole grinding device; Figure 8 The present invention is a stereoscopic diagram of a limit clamp in a sprocket inner hole grinding device.

[0031] In the attached figure: 1, processing table; 2, positioning seat; 3, grinding mechanism; 4, column; 5, bottom plate; 6, dust removal mechanism; 7, locking mechanism; 8, housing; 9, first motor; 10, first gear; 11, second gear; 12, first threaded rod; 13, moving seat; 14, housing; 15, first cylinder; 16, mounting frame; 17, second cylinder; 18, connecting block; 19, grinding machine; 20, vacuum cleaner; 21, connecting hood; 22. hose; 23. dust hood; 24. second motor; 25. second threaded rod; 26. fixed bracket; 27. connecting seat; 28. fixed block; 29. ​​movable bracket; 30. connecting rod; 31. mounting block; 32. limit clamp; 33. dust cover; 34. positioning column; 35. cleaning cover; 36. slide groove; 37. slider; 38. PLC controller; 39. support column; 40. limit groove; 41. limit block. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Specific embodiments

[0033] See also Figure 1-Figure 8 The present invention is a sprocket inner hole grinding device, comprising a processing table 1, a positioning seat 2 is fixedly connected to the top of the processing table 1, a grinding mechanism 3 is fixedly connected to the rear end of the top of the processing table 1, four corners of the bottom of the processing table 1 are fixedly connected to columns 4, the bottom of the column 4 is fixedly connected to a bottom plate 5, the rear end of the top of the bottom plate 5 is fixedly connected to a dust removal mechanism 6, and the inner cavity of the processing table 1 is fixedly connected to a locking mechanism 7; The grinding mechanism 3 includes a shell 8, the left side of the shell 8 is fixedly connected to the processing table 1, the right side of the shell 8 is fixedly connected to a first motor 9, the output end of the first motor 9 is fixedly connected to a first gear 10, the inner cavity of the shell 8 is movably connected to a second gear 11 through a bearing, the second gear 11 is meshed with the first gear 10, one side of the second gear 11 is fixedly connected to a first threaded rod 12, the side of the first threaded rod 12 away from the second gear 11 passes through the inner cavity of the shell 8 and extends to the inner cavity of the processing table 1, the surface of the first threaded rod 12 is threadedly connected to a moving seat 13, the top of the moving seat 13 is fixedly connected to a shell 14, the bottom of the inner cavity of the shell 14 is fixedly connected to a first cylinder 15, the top of the first cylinder 15 is fixedly connected to a mounting frame 16, the bottom of the mounting frame 16 is fixedly connected to a second cylinder 17, the front end of the second cylinder 17 is fixedly connected to a connecting block 18, and the bottom of the connecting block 18 is fixedly connected to a grinder 19; The dust removal mechanism 6 includes a vacuum cleaner 20, the bottom of which is fixedly connected to the top of the base plate 5, the top of the vacuum cleaner 20 is connected to a connecting cover 21, the top of the connecting cover 21 is connected to a hose 22, the top of the hose 22 passes through the bottom of the movable seat 13 and extends to the top of the movable seat 13, one side of the hose 22 is connected to a dust hood 23, and one side of the dust hood 23 extends to the rear end of the positioning seat 2.

[0034] Specifically: Through the control system of the PLC controller 38 and the grinding mechanism 3, it can ensure high-precision radial and axial movement of the grinding head in the inner hole of the sprocket, so that the grinding uniformity of each part of the inner hole is extremely high, which can effectively avoid local excessive or insufficient grinding, and significantly improve the smoothness and cylindricity of the inner hole. At the same time, the use of two groups of grinding heads with different mesh sizes can further improve the grinding accuracy of the grinding device. The dust removal mechanism 6 can promptly and effectively absorb the debris generated during the grinding process, which not only avoids secondary scratches on the surface of the inner hole by the debris, but also prevents the debris from entering the interior of the equipment, thereby reducing the wear rate of key components of the equipment, reducing the occurrence rate of equipment failures, extending the service life of the equipment, and reducing equipment maintenance costs and production downtime. Specific embodiments

[0035] See also Figure 1-Figure 8 On the basis of the specific embodiment 1, the locking mechanism 7 includes a second motor 24, the bottom of the second motor 24 is fixedly connected to the inner cavity of the processing table 1, the output end of the second motor 24 is fixedly connected to the second threaded rod 25, the bottom of the inner cavity of the processing table 1 and located on the outside of the second motor 24 is fixedly connected to a fixing frame 26, the top of the second threaded rod 25 passes through the bottom of the fixing frame 26 and extends to the top of the fixing frame 26, the top of the surface of the second threaded rod 25 is threadedly connected to a connecting seat 27, both sides of the top of the fixing frame 26 are fixedly connected to a fixing block 28, the surface of the fixing block 28 is movably connected to a movable frame 29 through a rotating shaft, the opposite side of the two movable frames 29 is movably connected to a connecting rod 30 through a rotating shaft, the side of the connecting rod 30 away from the movable frame 29 is movably connected to the connecting seat 27 through a rotating shaft, the top of the movable frame 29 is movably connected to a mounting block 31 through a rotating shaft, the top of the mounting block 31 passes through the inner cavity of the processing table 1 and extends to the top of the processing table 1, and the top of the mounting block 31 is movably connected to a limited clamping plate 32 through a rotating shaft.

[0036] Specifically: The sprocket can be firmly fixed by the limiting clamp 32 matched with the sprocket teeth to ensure that the sprocket will not be displaced or shaken during the grinding process, and high-precision positioning and reliable clamping of the sprocket can be achieved. This makes the center position and axial direction of the sprocket inner hole remain highly stable during the grinding process, and the grinding head can accurately grind the inner hole according to the preset trajectory, effectively avoiding problems such as eccentricity of the inner hole, local over-grinding or insufficient grinding due to inaccurate positioning. Specific embodiments

[0037] See also Figure 1-Figure 8On the basis of the specific embodiment 1, one side of the limiting clamping plate 32 is provided with teeth adapted to the sprocket gear, the limiting clamping plate 32 is a disassembly structure, the top of the processing table 1 is fixedly connected with a dust cover 33, the dust cover 33 is arranged on the outside of the positioning seat 2, the four corners of the top of the positioning seat 2 are provided with positioning holes, the four corners of the top of the processing table 1 are fixedly connected with positioning columns 34, the positioning columns 34 extend to the inner cavity of the positioning holes, the bottom of the surface of the vacuum cleaner 20 is provided with a cleaning cover 35, the top of the surface of the vacuum cleaner 20 is provided with an air outlet, the top of the rear end of the processing table 1 is provided with a slide groove 36, the bottom of one side of the moving seat 13 is fixedly connected with a slider 37, the slider 37 and the slide groove 36 are slidingly connected, a PLC controller 38 is fixedly connected to the left side of the bottom of the processing table 1, and the PLC controller 38 is electrically connected to the first motor 9, the second motor 24, the first cylinder 15 and the second cylinder 17 through wires. The grinder 19 has two groups of grinding heads, which are driven by two groups of motors respectively, and the mesh numbers of the grinding heads are different. The four corners of the bottom of the base plate 5 are fixedly connected to support columns 39, and the bottom of the support columns 39 is fixedly connected to a cushion block. Limiting grooves 40 are provided on both sides of the inner cavity of the mounting frame 16, and limiting blocks 41 are fixedly connected to both sides of the connecting block 18, and the limiting blocks 41 and the limiting grooves 40 are slidingly connected.

[0038] Specifically: the teeth adapted to the sprocket gear can ensure the stability of the sprocket fixation, and the limit clamp 32 is a replaceable and detachable structure, which can be adapted and selected according to different sprocket sizes. The dust cover 33 can improve the dustproof effect, prevent the dust generated during the grinding process from falling on the outside of the processing table 1, and improve the environmental protection effect of production. The positioning seat 2 can be installed through the positioning hole and the positioning column 34 to ensure the stability of the installation of the positioning seat 2. The cleaning cover 35 can facilitate the staff to clean the dust inside the vacuum cleaner 20, and the purpose of exhaust can be achieved through the air outlet. The slide groove 36 and the slider 37 can The movable seat 13 can be limited to ensure the stability of the movable seat 13 during movement. The start and stop of the first motor 9, the second motor 24, the first cylinder 15 and the second cylinder 17 can be controlled through the PLC controller 38, so as to achieve the purpose of convenient operation. Through the grinder 19, two groups of grinding heads are used with different grinding precisions to meet different processing requirements. The support column 39 and the pad block can support the bottom plate 5 while ensuring the overall stability of the device. The limit groove 40 and the limit block 41 can limit the connecting block 18 to ensure the stability of the connecting block 18 during movement.

[0039] The working principle of the present invention is as follows: by placing the sprocket above the positioning seat 2, the second motor 24 is started through the PLC controller 38, the second motor 24 drives the second threaded rod 25 to rotate, the second threaded rod 25 drives the connecting seat 27 to move, the connecting seat 27 drives the connecting rod 30 to move, the connecting rod 30 drives the movable frame 29 to contract, the movable frame 29 drives the mounting block 31 to move, the mounting block 31 drives the limiting clamp 32 to move, the teeth on one side of the limiting clamp 32 can mesh with the teeth on the surface of the sprocket, so as to achieve the purpose of efficient positioning, and at the same time the limiting clamp 32 can be replaced according to the size of the sprocket to achieve a more convenient positioning effect, the first motor 9 is started through the PLC controller 38, the first motor 9 drives the first gear 10 to rotate, the first gear 10 drives the second gear 11 to rotate, the second gear 11 drives the first threaded rod 12 to rotate, the first threaded rod 12 drives the moving seat 13 to move, The lateral horizontal movement mode of the grinding mechanism 3 can be adjusted. The first cylinder 15 is started through the PLC controller 38. The first cylinder 15 drives the mounting frame 16 to move, the mounting frame 16 drives the second cylinder 17 to move, the second cylinder 17 drives the connecting block 18 to move, and the connecting block 18 drives the grinder 19 to move. Through the cooperation of the first cylinder 15 and the second cylinder 17, the grinding mechanism 3 can be moved in the longitudinal and vertical directions, which is convenient for flexible adjustment of the grinding position, thereby improving the use effect of the grinding device. By starting the vacuum cleaner 20, the negative pressure airflow generated by the vacuum cleaner 20 enters the interior of the hose 22 through the connecting cover 21, and collects the dust and debris generated by grinding through the dust cover 23, and recycles the debris to the interior of the vacuum cleaner 20 through the dust cover 23, so that the debris generated during the grinding process can be sucked away in time to avoid the influence of the debris on the surface quality of the inner hole and the wear of the equipment.

[0040] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can better understand and utilize the present invention.

Claims

1. A sprocket inner hole grinding device, comprising a processing table (1), characterized in that: The top of the processing table (1) is fixedly connected to a positioning seat (2), the rear end of the top of the processing table (1) is fixedly connected to a grinding mechanism (3), the four corners of the bottom of the processing table (1) are fixedly connected to columns (4), the bottom of the columns (4) is fixedly connected to a bottom plate (5), the rear end of the top of the bottom plate (5) is fixedly connected to a dust removal mechanism (6), and the inner cavity of the processing table (1) is fixedly connected to a locking mechanism (7); The grinding mechanism (3) comprises a housing (8), the left side of the housing (8) being fixedly connected to the processing table (1), the right side of the housing (8) being fixedly connected to a first motor (9), the output end of the first motor (9) being fixedly connected to a first gear (10), the inner cavity of the housing (8) being movably connected to a second gear (11) via a bearing, the second gear (11) being meshed with the first gear (10), one side of the second gear (11) being fixedly connected to a first threaded rod (12), the side of the first threaded rod (12) away from the second gear (11) penetrating the housing (8) The inner cavity of the first threaded rod (12) extends to the inner cavity of the processing table (1), the surface of the first threaded rod (12) is threadedly connected to a movable seat (13), the top of the movable seat (13) is fixedly connected to a shell (14), the bottom of the inner cavity of the shell (14) is fixedly connected to a first cylinder (15), the top of the first cylinder (15) is fixedly connected to a mounting frame (16), the bottom of the mounting frame (16) is fixedly connected to a second cylinder (17), the front end of the second cylinder (17) is fixedly connected to a connecting block (18), and the bottom of the connecting block (18) is fixedly connected to a grinder (19); The dust removal mechanism (6) comprises a vacuum cleaner (20), the bottom of the vacuum cleaner (20) being fixedly connected to the top of the bottom plate (5), the top of the vacuum cleaner (20) being connected to a connecting cover (21), the top of the connecting cover (21) being connected to a hose (22), the top of the hose (22) passing through the bottom of the movable seat (13) and extending to the top of the movable seat (13), one side of the hose (22) being connected to a dust cover (23), and one side of the dust cover (23) extending to the rear end of the positioning seat (2); The locking mechanism (7) comprises a second motor (24), the bottom of the second motor (24) being fixedly connected to the inner cavity of the processing table (1), the output end of the second motor (24) being fixedly connected to a second threaded rod (25), the bottom of the inner cavity of the processing table (1) and located outside the second motor (24) being fixedly connected to a fixing frame (26), the top of the second threaded rod (25) passing through the bottom of the fixing frame (26) and extending to the top of the fixing frame (26), the top of the surface of the second threaded rod (25) being threadedly connected to a connecting seat (27), and both sides of the top of the fixing frame (26) being fixedly connected to A fixed block (28) is connected, and a surface of the fixed block (28) is movably connected to a movable frame (29) via a rotating shaft. The two movable frames (29) are movably connected to connecting rods (30) on opposite sides via a rotating shaft. The side of the connecting rod (30) away from the movable frame (29) is movably connected to the connecting seat (27) via a rotating shaft. The top of the movable frame (29) is movably connected to a mounting block (31) via a rotating shaft. The top of the mounting block (31) passes through the inner cavity of the processing table (1) and extends to the top of the processing table (1). The top of the mounting block (31) is movably connected to a limiting clamp (32) via a rotating shaft.

2. A sprocket inner hole grinding device according to claim 1, characterized in that: One side of the limiting clamping plate (32) is provided with teeth adapted to the sprocket gear, and the limiting clamping plate (32) is a disassembly structure.

3. A sprocket inner hole grinding device according to claim 1, characterized in that: A dust cover (33) is fixedly connected to the top of the processing table (1), and the dust cover (33) is arranged on the outside of the positioning seat (2).

4. A sprocket inner hole grinding device according to claim 1, characterized in that: The four corners of the top of the positioning seat (2) are each provided with a positioning hole, and the four corners of the top of the processing table (1) are each fixedly connected with a positioning column (34), and the positioning column (34) extends to the inner cavity of the positioning hole.

5. A sprocket inner hole grinding device according to claim 1, characterized in that: A cleaning cover plate (35) is provided at the bottom of the surface of the vacuum cleaner (20), and an air outlet is provided at the top of the surface of the vacuum cleaner (20).

6. A sprocket inner hole grinding device according to claim 1, characterized in that: A slide groove (36) is provided at the top of the rear end of the processing table (1), and a slider (37) is fixedly connected to the bottom of one side of the movable seat (13), and the slider (37) is slidably connected to the slide groove (36).

7. A sprocket inner hole grinding device according to claim 1, characterized in that: A PLC controller (38) is fixedly connected to the left side of the bottom of the processing table (1), and the PLC controller (38) is electrically connected to the first motor (9), the second motor (24), the first cylinder (15) and the second cylinder (17) respectively through wires.

8. A sprocket inner hole grinding device according to claim 1, characterized in that: The grinding machine (19) comprises two groups of grinding heads, which are driven by two groups of motors respectively, and the mesh sizes of the grinding heads are different.

9. A sprocket inner hole grinding device according to claim 1, characterized in that: The four corners of the bottom of the base plate (5) are fixedly connected to support columns (39), and the bottoms of the support columns (39) are fixedly connected to cushion blocks.

10. The sprocket inner hole grinding device according to claim 1, characterized in that: Limiting grooves (40) are provided on both sides of the inner cavity of the mounting frame (16), and limiting blocks (41) are fixedly connected to both sides of the connecting block (18), and the limiting blocks (41) and the limiting grooves (40) are slidably connected.

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