A special grinding device for the inner ring of automotive wheel hub bearings

Abstract

This invention discloses a dedicated grinding device for the inner ring of automotive wheel hub bearings, relating to the field of grinding processing equipment technology. It includes a support frame, to which an array of fixed frames are fixedly connected. The fixed frames are slidably connected to a first positioning post and an L-shaped rod. The first positioning post is rotatably connected to a first rotating wheel. The L-shaped rod is slidably connected to a sliding rod. Second positioning posts are provided on both the L-shaped rod and the sliding rod. The support frame is equipped with a positioning frame, which is slidably connected to a support rod and rotatably connected to a first pulley and a second pulley. The support rod is rotatably connected to a second rotating wheel. A grinding belt is wound around the second rotating wheel, the first pulley, and the second pulley, which are symmetrically distributed on the support rod. This invention clamps multiple workpieces using multiple first and second positioning posts, and passes the grinding belt through the center of the multiple workpieces to perform uniform inner spline machining on them, improving the machining efficiency of the inner spline of the wheel hub bearing inner ring.

Description

Technical Field

[0001] This invention discloses a special grinding device for the inner ring of automotive wheel hub bearings, which relates to the technical field of grinding processing equipment. Background Technology

[0002] The inner ring of an automotive wheel hub bearing is a core load-bearing component in the automotive transmission system. It relies on the tight fit of the spline tooth surfaces to achieve stable power output. The smoothness, surface roughness, and uniformity of the spline tooth surfaces determine the smoothness of power transmission. Therefore, the inner splines of the wheel hub bearing inner ring must be processed by a dedicated grinding device. Existing grinding devices generally adopt a single workpiece-to-single-grinding-station processing mode, which means that the grinding device can only grind the inner splines of a single wheel hub bearing inner ring. This results in a low output of spline grinding products per unit time and limits processing efficiency. In actual production, multiple grinding devices can be operated simultaneously to meet large-volume demands, but this method increases equipment investment, site occupation, and maintenance costs. Summary of the Invention

[0003] In order to overcome the shortcomings of existing grinding mechanisms that can only perform single grinding, the present invention provides a special grinding device for the inner ring of automobile wheel hub bearings.

[0004] The technical solution of the present invention is: a special grinding processing device for the inner ring of an automobile wheel hub bearing, comprising a support frame, a fixed frame fixedly connected to the support frame, a first positioning column slidably connected to the fixed frame, a first rotating wheel slidably connected to the first positioning column, a first driving module for driving the first rotating wheel thereon to rotate on the first positioning column, an L-shaped rod slidably connected to the fixed frame, a sliding rod slidably connected to the L-shaped rod, the sliding rod being slidably connected to the fixed frame, a first push rod for driving the L-shaped rod to move on the fixed frame, a second positioning column on both the L-shaped rod and the sliding rod, a positioning frame on the support frame, a support rod slidably connected to the positioning frame, a second rotating wheel slidably connected to the support rod, a first pulley and a second pulley slidably connected to the positioning frame, and a grinding belt wound around the second rotating wheel, the first pulley and the second pulley slidably connected to the support rod.

[0005] As a preferred embodiment, the support frame is slidably connected to a sliding frame, and the support frame is provided with symmetrically distributed second drive modules for driving the sliding frame to move. The sliding frame is provided with symmetrically distributed second push rods, the telescopic ends of which are fixedly connected to the positioning frame. The positioning frame is slidably connected to the sliding frame. The positioning frame is provided with a third drive module for driving the first pulley to rotate, and a fourth drive module for driving the support rod to move. The positioning frame is fixedly connected to a positioning block, and the positioning block is slidably connected to a moving ring. The positioning block is provided with a third push rod for driving the moving ring to move. The positioning block is slidably connected to circumferentially distributed sliding rings, and the moving rings are used to compress all the sliding rings and drive all the sliding rings to move. The sliding rings are fixedly connected to wedge blocks, and a first elastic element is fixedly connected between the wedge blocks and the positioning block. The circumferentially distributed wedge blocks are used to fix the support rod.

[0006] As a preferred embodiment, the fixing frame is provided with symmetrically distributed adjusting screws, and the first positioning post is provided with an array of openings. The adjusting screws are used to extend into the openings corresponding to the first positioning post to fix the first positioning post. The L-shaped rod is fixedly connected to a first screw, and a pressing block is threaded onto the first screw. The pressing block is used to press the sliding rod.

[0007] As a preferred embodiment, the symmetrically distributed second pulleys are all driven by the first pulleys via belts, and the belts on the second pulleys and the first pulleys are used to make the second pulleys move synchronously with the grinding belt.

[0008] As a preferred embodiment, the system further includes a movable frame slidably connected to the support frame. The support frame has symmetrically distributed fifth drive modules for driving the movable frame to move. A first mounting frame and a second mounting frame are slidably connected to both sides of the movable frame. The movable frame has symmetrically distributed fourth push rods for driving the first and second mounting frames to move. The second mounting frame has symmetrically distributed friction wheels rotatably connected to it. The second mounting frame also has a seventh drive module for driving the symmetrically distributed friction wheels to rotate. The second mounting frame has a slidably connected positioning rod, and all the symmetrically distributed friction wheels are in contact with the positioning rod. A support block is fixed to the first mounting frame for supporting one end of the positioning rod.

[0009] As a preferred embodiment, two rotating blocks are rotatably connected to the first mounting bracket. An eighth driving module is provided on the first mounting bracket to drive the two rotating blocks to rotate. Each rotating block is threadedly connected to a second screw, and the two second screws are jointly fixed to a push plate. An array of first guide plates and an array of second guide plates are fixed to the support bracket. The array of first guide plates, array of second guide plates, and array of fixed brackets correspond one-to-one. Both the first guide plate and the second guide plate are fixed to their corresponding fixed brackets. The second guide plate is used to guide the workpiece.

[0010] As a preferred embodiment, the second guide plates in the array have an increasing inclination from the side closest to the second mounting bracket to the side furthest away.

[0011] As a preferred embodiment, the first guide plate is slidably connected to an extrusion plate, and symmetrically distributed second elastic elements are fixed between the extrusion plate and the first guide plate. The extrusion plate and the corresponding second guide plate are used together to position the workpiece.

[0012] As a preferred embodiment, both the extrusion plate and the second guide plate are provided with rotating ball bearings to ensure smooth operation of the workpiece during movement.

[0013] As a preferred embodiment, the L-shaped rod and the sliding rod are slidably connected to the corresponding second positioning post, and both the L-shaped rod and the sliding rod are provided with sensors. A third elastic element is fixed between the sensor and the corresponding second positioning post. A ninth drive module is provided on the first mounting bracket, and the ninth drive module is used to drive the positioning rod to rotate.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention clamps multiple workpieces by using multiple first positioning posts and multiple second positioning posts, and passes through multiple workpieces from the middle by a support rod and a grinding belt on it, so as to perform uniform inner spline machining on multiple workpieces, thereby improving the machining efficiency of the inner spline of the inner ring of the wheel hub bearing.

[0015] This invention provides support for the support rod through a positioning block and locks the support rod with a wedge block on it, thereby improving the stability of the support rod and the grinding belt during processing and improving the grinding accuracy of the spline on the inner side of the inner ring of the wheel hub bearing.

[0016] This invention uses a positioning rod and a sensor to position the splines of a workpiece, ensuring that the splines of multiple workpieces are in the same direction, which facilitates the processing of the grinding belt and further improves the processing accuracy. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram provided in the embodiment of this application is shown; Figure 2 A three-dimensional structural schematic diagram of the positioning frame provided in an embodiment of this application is shown; Figure 3 A three-dimensional structural schematic diagram of the fixing frame provided in an embodiment of this application is shown; Figure 4 A three-dimensional structural cross-sectional view of the L-shaped rod and sliding rod provided in the embodiments of this application is shown; Figure 5 A three-dimensional structural schematic diagram of the support rod and positioning block provided in the embodiments of this application is shown; Figure 6 A three-dimensional structural cross-sectional view of the fixing frame and support rod provided in an embodiment of this application is shown; Figure 7 A three-dimensional structural cross-sectional view of the positioning block provided in an embodiment of this application is shown; Figure 8 A three-dimensional structural schematic diagram of the movable frame provided in an embodiment of this application is shown; Figure 9 A schematic diagram of the structure of the first mounting bracket provided in an embodiment of this application is shown; Figure 10 A perspective cross-sectional view of the first mounting bracket provided in an embodiment of this application is shown; Figure 11 A three-dimensional structural schematic diagram of the first guide plate provided in an embodiment of this application is shown; Figure 12 A three-dimensional structural schematic diagram of the ninth driving module provided in an embodiment of this application is shown.

[0018] In the diagram: 1-Support frame, 2-Fixed frame, 3-First positioning post, 301-First rotating wheel, 4-First drive module, 5-L-shaped rod, 6-Sliding rod, 7-First push rod, 8-Second positioning post, 9-Sliding frame, 10-Second drive module, 11-Second push rod, 12-Positioning frame, 13-Support rod, 1301-Second rotating wheel, 14-Third drive module, 15-First pulley, 16-Second pulley, 17-Grinding belt, 18-Fourth drive module, 20-Positioning block, 22-Moving ring, 23-Third push rod, 24 - Sliding ring, 25- Wedge block, 30- Adjusting screw, 31- First screw, 32- Extrusion block, 40- Moving frame, 41- Fifth drive module, 4201- First mounting frame, 4202- Second mounting frame, 43- Fourth push rod, 44- Friction wheel, 45- Sixth drive module, 46- Positioning rod, 47- Support block, 51- Rotating block, 52- Seventh drive module, 53- Second screw, 54- Push plate, 55- First guide plate, 56- Second guide plate, 57- Extrusion plate, 60- Sensor, 61- Eighth drive module. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to specific embodiments. Example 1

[0020] A special grinding device for the inner ring of automotive wheel hub bearings, such as Figures 1-6 As shown, it includes a support frame 1, with fixed frames 2 arranged in an array fixed to the support frame 1. First positioning posts 3 are slidably connected to the fixed frames 2, and first rotating wheels 301 are rotatably connected to the first positioning posts 3. A first driving module 4 is provided on the first positioning posts 3 to drive the first rotating wheels 301 to rotate. An L-shaped rod 5 is slidably connected to the fixed frame 2, and a sliding rod 6 is slidably connected to the L-shaped rod 5. The sliding rod 6 is slidably connected to the fixed frame 2. A first push rod 7 is provided on the fixed frame 2 to move the L-shaped rod 5. Second positioning posts 8 are provided on both the L-shaped rod 5 and the sliding rod 6. A positioning frame 12 is provided, and a support rod 13 is slidably connected to the positioning frame 12. A second rotating wheel 1301 is rotatably connected to the support rod 13. A first pulley 15 and a second pulley 16 are rotatably connected to the positioning frame 12. A grinding belt 17 is wound around the second rotating wheel 1301, the first pulley 15 and the second pulley 16 symmetrically distributed on the support rod 13. The second pulley 16 is driven by the first pulley 15 through a belt. The belt on the second pulley 16 and the first pulley 15 is used to make the second pulley 16 move synchronously with the grinding belt 17.

[0021] In the above scheme, the number of fixing frames 2 is three. This number is only an example, and the specific number can be changed according to the actual situation. The number of first rotating wheels 301 on the first positioning post 3 is two. The first rotating wheels 301 on the first positioning post 3 are used to contact the outer surface of the workpiece and drive the workpiece to rotate. The first drive module 4 consists of a motor, a worm gear, and two sets of pulley belts. The output shaft of the motor of the first drive module 4 is fixedly connected to the worm gear. The worm gear is rotatably connected to the corresponding first positioning post 3. The worm gear is fixedly connected to the lower pulley of the two sets of pulley belts. The upper pulley of the two sets of pulley belts is respectively connected to the first rotating wheel 301 on the first positioning post 3. The drive wheel 301 is fixedly connected. The worm gear drives the first rotating wheel 301 on the first positioning post 3 to rotate via a belt. The first push rod 7 is an existing electric push rod. The first push rod 7 controls the corresponding L-shaped rod 5 to move in the vertical direction. In this embodiment, the L-shaped rod 5 and the sliding rod 6 are fixedly connected to the corresponding second positioning post 8. The right front part of the positioning frame 12 has a vertical part. A sliding groove support rod 13 is provided on the vertical part of the positioning frame 12 and slides in the sliding groove on the vertical part of the positioning frame 12. The first pulley 15 and the second pulley 16 both rotate in the vertical part of the positioning frame 12. The grinding belt 17 is used to grind the inside of the workpiece.

[0022] like Figures 5-7As shown, a sliding frame 9 is slidably connected to a support frame 1. Symmetrically distributed second drive modules 10 are mounted on the support frame 1, which drive the sliding frame 9 to move. Symmetrically distributed second push rods 11 are mounted on the sliding frame 9, with their telescopic ends fixed to a positioning frame 12. The positioning frame 12 is slidably connected to the sliding frame 9. A third drive module 14, which drives the first pulley 15 to rotate, is mounted on the positioning frame 12. A fourth drive module, which drives the support rod 13 to move, is also mounted on the positioning frame 12. 18. A positioning block 20 is fixedly connected to the positioning frame 12. A moving ring 22 is slidably connected to the positioning block 20. A third push rod 23 is provided on the positioning block 20 to drive the moving ring 22 to move. A circumferentially distributed sliding ring 24 is slidably connected to the positioning block 20. The moving ring 22 is used to squeeze all the sliding rings 24 and drive all the sliding rings 24 to move. A wedge block 25 is fixedly connected to the sliding ring 24. A first elastic element is fixedly connected between the wedge block 25 and the positioning block 20. The circumferentially distributed wedge blocks 25 are used to fix the support rod 13.

[0023] In the above scheme, the sliding frame 9 has two sliding rods, and there are two second drive modules 10. Each second drive module 10 consists of a servo motor and a threaded rod. The threaded rod on the second drive module 10 is threadedly connected to the sliding frame 9. The two second drive modules 10 jointly control the movement of the sliding frame 9 in the front-back direction. There are two second push rods 11, which are existing electric push rods. The two second push rods 11 jointly control the movement of the positioning frame 12 in the vertical direction. The positioning frame 12 slides on the two sliding rods of the sliding frame 9. The third drive module 14 is an existing motor, and the fourth drive module 18 consists of a servo motor and a gear rack. The fourth drive module 18 controls the movement of the support rod 13 in the left-right direction. The positioning block 20 has an opening. A guide groove is provided to support the support rod 13. An inclined part is provided on the right side of the guide groove on the positioning block 20. The inclined part of the guide groove on the positioning block 20 is used to facilitate the support rod 13 to enter its interior. Four inclined parts are provided on the right side of the moving ring 22. The sliding ring 24 is provided with a through groove for the corresponding inclined part on the moving ring 22 to pass through. The four inclined parts of the moving ring 22 are used to squeeze the through groove of the corresponding sliding ring 24. Limiting grooves are provided at both the left and right ends of the support rod 13. The wedge block 25 can be locked in the limiting groove of the support rod 13. The first elastic element on the wedge block 25 is a spring. The two limiting grooves of the support rod 13 enable all parts in this embodiment to be mirrored on the right side of a set of workstations, thereby realizing continuous processing of multiple workpieces in two workstations.

[0024] like Figure 3 and Figure 4As shown, the fixing frame 2 is provided with symmetrically distributed adjusting screws 30, and the first positioning post 3 is provided with arrayed openings. The adjusting screws 30 are used to insert into the openings of the corresponding first positioning post 3 to fix the first positioning post 3. The L-shaped rod 5 is fixedly connected to the first screw 31, and the first screw 31 is threadedly connected to the pressing block 32. The pressing block 32 is used to press the sliding rod 6.

[0025] In the above scheme, a sliding groove is opened on the sliding rod 6, the first screw 31 is located inside the sliding groove of the sliding rod 6, and a rubber layer is provided on the contact side of the extrusion block 32 and the sliding rod 6. The rubber layer of the extrusion block 32 is used to increase the friction with the sliding rod 6 and reduce the probability of the sliding rod 6 slipping.

[0026] Before processing the workpiece, the operator first rotates one of the adjusting screws 30, moving it outwards until it is outside the opening on the first positioning post 3. The operator then adjusts the height of the first positioning post 3. After adjustment, the operator rotates the adjusting screw 30 in the opposite direction, inserting it into the corresponding opening. This process is repeated for the remaining first positioning posts 3, adjusting them according to the workpiece size and the height difference of the support position, until the height of all first positioning posts 3 is adjusted. Next, the operator rotates one of the pressing blocks 32, moving it to the left so that the corresponding sliding rod 6 can slide up and down relative to the corresponding L-shaped rod 5. The operator then adjusts the position of the sliding rod 6 so that the second positioning post 8 on the L-shaped rod 5 and the second positioning post 8 on the sliding rod 6 adapt to the height difference of the corresponding clamping position on the workpiece. After adjustment, the operator rotates the pressing block 32 in the opposite direction, moving it to the right, pressing and fixing the sliding rod 6. The operator then repeats the above steps to complete the height adjustment of all sliding rods 6, enabling the device to clamp the inner rings of different models of automotive wheel hub bearings, after which workpiece processing can begin.

[0027] When processing the workpiece, firstly, the third push rod 23 is activated. The telescopic end of the third push rod 23 drives the moving ring 22 to move to the right. The moving ring 22, through its four inclined parts, drives all the sliding rings 24 to move outward. The sliding rings 24 drive the corresponding wedge blocks 25 to move outward. The wedge blocks 25 press against the first elastic element on them until the wedge blocks 25 no longer contact the limiting groove of the support rod 13. Then, the third push rod 23 is closed. Subsequently, the fourth drive module 18 is activated. The fourth drive module 18, through the cooperation of a motor and a gear rack, drives the support rod 13 to move to the right. The support rod 13 drives its two rotating wheels and the grinding belt 17 to move to the right until the left end of the support rod 13 moves to the right side of all the fixed frames 2. Then, the fourth drive module 18 is closed. Subsequently, the third push rod 23 is activated. The telescopic end of the third push rod 23 drives the moving ring 22 to move to the left. The four inclined parts on the moving ring 22 release the limiting of the corresponding sliding rings 24. The sliding rings 24, under the action of the first spring on them, move inward until they return to their initial position. Then, the third push rod 23 is activated. All second drive modules 10 are activated, and all second drive modules 10 together drive the sliding frame 9 to move backward. The sliding frame 9 drives the parts on it to move synchronously until the sliding frame 9 moves away from the fixed frame 2. Then, the two second drive modules 10 are stopped. Then, the first push rod 7 is activated. The telescopic end of the first push rod 7 drives the L-shaped rod 5 to move upward. The L-shaped rod 5 drives the sliding rod 6 to move upward. The L-shaped rod 5 and the sliding rod 6 respectively drive the corresponding second positioning pins 8 to move upward until the lower side of the L-shaped rod 5 moves to be coplanar with the upper lower surface of the fixed frame 2. Then, the first push rod 7 is closed. Then, the operator places the workpieces on the two first positioning pins 3 on the fixed frame 2 in sequence. The first rotating wheel 301 on the two first positioning pins 3 achieves the centering positioning of the workpieces. The operator aligns the splines of the workpieces so that the internal splines of the three workpieces face the same direction. Then, the first push rod 7 is activated. The first push rod 7 drives the corresponding two second positioning pins 8 to move downward through the L-shaped rod 5 and the sliding rod 6 to clamp the workpieces. Then, the first push rod 7 is closed.

[0028] After clamping, all second drive modules 10 are activated. Both second drive modules 10 jointly drive the sliding frame 9 forward. The sliding frame 9, through the positioning frame 12, drives the support rod 13 forward. The support rod 13 drives the grinding belt 17 on it to move synchronously until the grinding belt 17 reaches the center position of the first positioning post 3. Then, all second drive modules 10 are deactivated. The two second push rods 11 are activated. The two second push rods 11 jointly drive the positioning frame 12 downward. The positioning frame 12 drives the support rod 13 downward until the support rod 13 reaches the center position of the workpiece. Then, all second push rods 11 are stopped, and the fourth drive module 18 is activated. The fourth drive module 18 drives the support rod 13 to move to the left via a motor and a rack and pinion. When the left end of the support rod 13 enters the guide groove of the positioning block 20 and contacts the wedge block 25, it squeezes all the wedge blocks 25, causing them to move outward. During the movement, the wedge blocks 25 squeeze the first elastic element. The wedge blocks 25 are always in contact with the support rod 13 due to the elastic force of the first elastic element until the limiting groove on the left side of the support rod 13 moves to align with the wedge blocks 25. The wedge blocks 25 are then moved inward by the elastic force of the first elastic element and are locked into the limiting groove on the left side of the support rod 13. Then, the fourth drive module 18 is turned off, thus achieving the support and positioning of the support rod 13.

[0029] After the support rod 13 is in place, all the second push rods 11 are activated. The telescopic ends of the second push rods 11 drive the grinding belt 17 to move upward through the positioning frame 12 and the support rod 13 until the grinding belt 17 contacts the spline on the workpiece. Then, the third drive module 14 and all the first drive modules 4 are activated. The first drive module 4 drives the first rotating wheel 301 on the corresponding first positioning column 3 to rotate. The rotating wheel on the first positioning column 3 drives the workpiece to rotate. The third drive module 14 drives the grinding belt 17 to rotate through the first pulley 15. During this process, all the second push rods 11 are controlled. The second push rods 11 drive the grinding belt 17 to move up and down through the positioning frame 12 and the support rod 13, so that the grinding belt 17 always keeps in contact with the inner spline of the workpiece, thereby realizing the grinding of the inner spline of the workpiece.

[0030] After grinding is complete, the third drive module 14 and all first drive modules 4 are shut down. Then, all second push rods 11 are controlled. All second push rods 11 drive the grinding belt 17 downward through the positioning frame 12 and support rod 13 until the grinding belt 17 moves to the axis position of the workpiece. All second push rods 11 are shut down. Then, the third push rod 23 is started. The telescopic end of the third push rod 23 drives the moving ring 22 to move to the right. The four inclined parts of the moving ring 22 drive all sliding rings 24 to move outward. The sliding rings 24 drive the corresponding wedge blocks 25 to move outward until the wedge blocks 25 lose contact with the limiting groove on the left side of the support rod 13. The third push rod 23 is stopped. Then, the fourth drive module 18 is started. The fourth drive module 18 drives the support rod 13 and its parts to move to the right until the left end of the support rod 13 moves to the right side of all the fixed frames 2. The fourth drive module 18 is shut down. Then, the third push rod is started. 23. The telescopic end of the third push rod 23 drives the moving ring 22 to move to the left. The moving ring 22 releases the limit on the sliding ring 24. The sliding ring 24 is subjected to the elastic force of the first elastic element on it. All sliding rings 24 move inward until they return to their initial positions. Then, all the first push rods 7 are activated. The first push rods 7 drive the second positioning post 8 to move upward through the L-shaped rod 5 and the sliding rod 6. The second positioning post 8 releases contact with the workpiece until the lower side of the L-shaped rod 5 moves to be coplanar with the upper lower surface of the fixed frame 2. Then, all the first push rods 7 are stopped. The operator removes the processed workpiece from the first positioning post 3. After the workpiece is removed, the fourth drive module 18 and all the first push rods 7 are activated. The fourth drive module 18 drives the support rod 13 and its parts to reset. All the first push rods 7 drive the corresponding second positioning post 8 to reset through the L-shaped rod 5 and the sliding rod 6. Then, the fourth drive module 18 and all the first push rods 7 are turned off. Example 2

[0031] Based on Example 1, such as Figure 1 and Figures 8-11 As shown, it also includes a movable frame 40, which is slidably connected to the support frame 1. The support frame 1 is provided with symmetrically distributed fifth drive modules 41, which are used to drive the movable frame 40 to move. The two sides of the movable frame 40 are slidably connected to a first mounting frame 4201 and a second mounting frame 4202, respectively. The movable frame 40 is provided with symmetrically distributed fourth push rods 43, which are used to drive the first mounting frame 4201 and the second mounting frame 4202 to move. The second mounting frame 4202 is rotatably connected to symmetrically distributed friction wheels 44. The second mounting frame 4202 is provided with a seventh drive module 45 for driving the symmetrically distributed friction wheels 44 to rotate. The second mounting frame 4202 is slidably connected to a positioning rod 46, and the symmetrically distributed friction wheels 44 are all in contact with the positioning rod 46. The first mounting frame 4201 is fixedly connected to a support block 47, which is used to support one end of the positioning rod 46.

[0032] In the above scheme, a sliding groove is provided on the support frame 1, and the moving frame 40 slides in the sliding groove of the support frame 1. The fifth drive module 41 consists of a motor and a screw. The screw on the fifth drive module 41 is threadedly connected to the moving frame 40. The two fifth drive modules 41 jointly control the moving frame 40 to move in the front-back direction. The fourth push rod 43 is an existing mechanism. The two fourth push rods 43 respectively control the vertical movement of the first mounting frame 4201 and the second mounting frame 4202. The outer surface of the friction wheel 44 is provided with a rubber layer. The rubber layer of the friction wheel 44 is used to increase the friction with the positioning rod 46. The seventh drive module 45 consists of an electric motor and a gear set. The output shaft of the motor on the seventh drive module 45 is fixedly connected to one of the gears. The friction wheel 44 is fixedly connected to the other gear on the seventh drive module 45. A guide cavity is provided on the support block 47. The guide cavity on the support block 47 gradually narrows from right to left. When the positioning rod 46 moves to the left and enters the support block 47, the guide cavity on the support block 47 guides the positioning rod 46.

[0033] like Figure 1 and Figures 8-11 As shown, two rotating blocks 51 are rotatably connected to the first mounting bracket 4201. An eighth drive module 52 is provided on the first mounting bracket 4201, which drives the two rotating blocks 51 to rotate. Each rotating block 51 is threaded with a second screw 53. The two second screws 53 are jointly fixed to a push plate 54. An array of first guide plates 55 and second guide plates 56 are fixed to the support frame 1. The array of first guide plates 55, second guide plates 56, and fixed frames 2 correspond one-to-one. The first guide plate 55 and... The second guide plates 56 are all fixedly connected to the corresponding fixed frame 2. The second guide plates 56 are used to guide the workpiece. The inclination of the arrayed second guide plates 56 increases sequentially from the side closer to the second mounting frame 4202 to the side farther away. The first guide plate 55 is slidably connected to the extrusion plate 57. The extrusion plate 57 and the first guide plate 55 are fixedly connected to symmetrically distributed second elastic elements. The extrusion plate 57 and the corresponding second guide plate 56 are used together to position the workpiece. Rotating balls are provided on both the extrusion plate 57 and the second guide plate 56 to ensure smooth operation of the workpiece during movement.

[0034] In the above scheme, the two rotating blocks 51 have the same shape, the eighth drive module 52 consists of a motor and two sets of pulleys and belts, the eighth drive module 52, the rotating blocks 51 and the second screw 53 jointly control the push plate 54 to move in the left and right directions, the two second screws 53 have the same shape, the second elastic element on the first guide plate 55 is a spring, the extrusion plate 57 can extrude the workpiece to ensure that the workpiece is limited in the left and right directions when clamped, and the rotating balls on the extrusion plate 57 ensure smooth rotation of the workpiece during processing.

[0035] like Figure 12As shown, the L-shaped rod 5 and the sliding rod 6 are slidably connected to the corresponding second positioning post 8. Both the L-shaped rod 5 and the sliding rod 6 are equipped with sensors 60. A third elastic element is fixed between the sensor 60 and the corresponding second positioning post 8. The first mounting bracket 4201 is equipped with a ninth drive module 61, which is used to drive the positioning rod 46 to rotate.

[0036] In the above scheme, the third elastic element of the second positioning post 8 is a spring. The third elastic element on the second positioning post 8 is used to transmit the extrusion force of the workpiece on the second positioning post 8 to the sensor 60. The ninth drive module 61 is composed of a motor and end face teeth. The left end of the positioning rod 46 is provided with a toothed part. The end face teeth of the ninth drive module 61 can mesh with the toothed part of the positioning rod 46.

[0037] Based on the height positioning of all first positioning pins 3 and the height adjustment of all sliding rods 6 in Example 1, the sixth drive module 45 is first started. The sixth drive module 45 drives the two friction wheels 44 to rotate. The two friction wheels 44 jointly drive the positioning rod 46 to move to the right through friction. The positioning rod 46 is disengaged from the eighth drive module 61 until it moves to a distance between the left end of the positioning rod 46 and the first mounting bracket 4201 that is sufficient for a single workpiece to pass through. Then the sixth drive module 45 is stopped. Subsequently, the operator puts three workpieces on the positioning rod 46 in sequence. Under the action of gravity, the positioning rod 46 will be more easily supported in the keyway between the two splines on the inside of the workpiece.

[0038] After the workpiece is placed on the positioning rod 46, the sixth drive module 45 is activated to rotate in the reverse direction. The sixth drive module 45 drives the positioning rod 46 to move to the left through the two friction wheels 44. The positioning rod 46 moves to the left and passes through the guide cavity of the support block 47 until the teeth on the positioning rod 46 mesh with the end face teeth of the eighth drive module 61. The sixth drive module 45 is then closed. Subsequently, the seventh drive module 52 is activated. The seventh drive module 52 drives the two rotating blocks 51 to rotate. The two rotating blocks 51 drive the push plate 54 to move to the right through the two second screws 53. The push plate 54 pushes the workpiece to the right, causing the three workpieces to accumulate on the right side of the positioning rod 46. Then, all the fourth push rods 43 are activated. The two fourth push rods 43 drive the first mounting bracket 4201 and the second mounting bracket 4202 to move upward respectively. The first mounting bracket 4201 and the second mounting bracket 4202 drive the parts on them to move upward respectively. The positioning rod 46 drives the workpiece on it to move upward until the clamping end face of the workpiece is higher than the highest point of the upper surface of the first positioning post 3. Then, all the fourth push rods 43 are closed.

[0039] After closing all the fourth push rods 43, control the seventh drive module 52. The seventh drive module 52 drives the two rotating blocks 51 to rotate in opposite directions. The rotating blocks 51 drive the push plate 54 to reset through the second screw 53. After the reset is completed, close the seventh drive module 52. Then, start all the first push rods 7. The first push rods 7 drive the corresponding second positioning pins 8 to move upward until the lower side of the L-shaped rod 5 moves to the same plane as the upper lower surface of the fixed frame 2. Then, close the first push rods 7. Based on the backward movement of the sliding frame 9 in embodiment 1, start all the fifth drive modules 41. The two fifth drive modules 41 jointly drive the moving frame 40 to move backward. During the movement, the workpiece is guided by the first guide plate 55 and the second guide plate 56 to move the workpiece to the position of the corresponding fixed frame 2. Continue to move backward until the workpiece moves above the first positioning pin 3. Then, start all the first push rods 7. The first push rods 7 drive the corresponding two second positioning pins 8 to move downward until the rotating wheels of the two second positioning pins 8 contact the outer surface of the workpiece, so that the second positioning pins 8 and the positioning rod 46 achieve the pre-positioning effect on the workpiece.

[0040] During the downward movement of the second positioning post 8, it compresses the third elastic element on it. The sensor 60 detects the compressive force of the second positioning post 8. If the positioning rod 46 is not engaged in the keyway between the two splines of a workpiece, the value detected by the sensor 60 exceeds the normal pressure range. The eighth drive module 61 is then activated, driving the positioning rod 46 to rotate. Utilizing the rotation of the positioning rod 46 and the friction between the positioning rod 46 and the workpiece, the workpiece is rotated until the positioning rod 46 is engaged in one of the keyways, bringing the value detected by the sensor 60 back to the normal range. The eighth drive module 61 is then deactivated. Then, the first push rod 7 is controlled to start the fourth push rod 43. The first push rod 7 and the fourth push rod 43 drive the second positioning post 8 and the positioning rod 46 to move downward synchronously until the outer surface of the workpiece contacts the rotating wheels on the corresponding two first positioning posts 3 to clamp the actual workpiece. Then, the first push rod 7 and the fourth push rod 43 are closed, and the sixth drive module 45 is started. The sixth drive module 45 drives the positioning rod 46 to move to the right through the two friction wheels 44 until the left end of the positioning rod 46 moves to the right surface of the right side fixing frame 2. Then, the sixth drive module 45 is closed, and the processing steps of the above embodiment are repeated to complete the processing of the workpiece.

[0041] After processing is completed, the sixth drive module 45 is activated to reverse. The sixth drive module 45, through the two friction wheels 44, jointly drives the positioning rod 46 to move to the left and reset. Then, all the fourth push rods 43 are activated, which drive the positioning rod 46 and the workpiece on it to move upward until the workpiece clamping end face is higher than the highest point of the upper surface of the first positioning post 3. Then, all the fourth push rods 43 are closed. Then, all the fifth drive modules 41 are activated, which drive the moving frame 40 and the parts on it to move forward until the moving frame 40 is reset. Then, all the fifth drive modules 41 are closed. Then, the sixth drive module 45 is activated, which drives the positioning rod 46 to move to the right until the distance between the left end of the positioning rod 46 and the extrusion plate 57 is greater than the thickness of the workpiece. The sixth drive module 45 is then stopped. The operator then removes the processed workpiece from the positioning rod 46, controls the sixth drive module 45 to rotate in the opposite direction, and drives the positioning rod 46 to reset. After the reset is completed, the sixth drive module 45 is turned off, and all the fourth push rods 43 are activated. The two fourth push rods 43 work together to drive the positioning rod 46 to move downward. After the positioning rod 46 moves and resets, all the fourth push rods 43 are turned off.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

Claims

1. A special grinding device for the inner ring of automotive wheel hub bearings, characterized in that: The system includes a support frame (1), which is fixedly connected to an array of fixed frames (2). The fixed frames (2) are slidably connected to symmetrically distributed first positioning columns (3). Symmetrically distributed first rotating wheels (301) are rotatably connected to the first positioning columns (3). A first driving module (4) is provided on the first positioning columns (3) to drive the first rotating wheels (301) to rotate. An L-shaped rod (5) is slidably connected to the fixed frames (2). A sliding rod (6) is slidably connected to the L-shaped rod (5). The sliding rod (6) is slidably connected to the fixed frames (2). The fixed frames (2) are provided with a mechanism to drive the L-shaped rod (5) to move. The first push rod (7), the L-shaped rod (5) and the sliding rod (6) are each provided with a second positioning post (8), the support frame (1) is provided with a positioning frame (12), the positioning frame (12) is slidably connected with a support rod (13), the support rod (13) is rotatably connected with symmetrically distributed second rotating wheels (1301), the positioning frame (12) is rotatably connected with a first pulley (15) and symmetrically distributed second pulleys (16), and the second rotating wheels (1301), the first pulley (15) and the second pulleys (16) symmetrically distributed on the support rod (13) are all wound with a grinding belt (17).

2. A special grinding device for the inner ring of an automotive wheel hub bearing according to claim 1, characterized in that: The support frame (1) is slidably connected to a sliding frame (9). The support frame (1) is provided with symmetrically distributed second drive modules (10), which are used to drive the sliding frame (9) to move. The sliding frame (9) is provided with symmetrically distributed second push rods (11). The telescopic ends of the second push rods (11) are fixedly connected to the positioning frame (12). The positioning frame (12) is slidably connected to the sliding frame (9). The positioning frame (12) is provided with a third drive module (14) that drives the first pulley (15) to rotate. The positioning frame (12) is provided with a fourth drive module (18) that drives the support rod (13) to move. A positioning block (20) is fixedly connected to the positioning frame (12). A moving ring (22) is slidably connected to the positioning block (20). A third push rod (23) is provided on the positioning block (20) for driving the moving ring (22) to move. A circumferentially distributed sliding ring (24) is slidably connected to the positioning block (20). The moving ring (22) is used to squeeze all the sliding rings (24) and drive all the sliding rings (24) to move. A wedge block (25) is fixedly connected to the sliding ring (24). A first elastic element is fixedly connected between the wedge block (25) and the positioning block (20). The circumferentially distributed wedge block (25) is used to fix the support rod (13).

3. A special grinding device for the inner ring of an automotive wheel hub bearing according to claim 2, characterized in that: The fixing frame (2) is provided with symmetrically distributed adjusting screws (30), and the first positioning post (3) is provided with arrayed openings. The adjusting screws (30) are used to insert into the openings corresponding to the first positioning post (3) to fix the first positioning post (3). The L-shaped rod (5) is fixedly connected to the first screw (31), and the first screw (31) is threadedly connected to the pressing block (32). The pressing block (32) is used to press the sliding rod (6).

4. A special grinding device for the inner ring of an automotive wheel hub bearing according to claim 2, characterized in that: The symmetrically distributed second pulleys (16) are all driven by the first pulley (15) via belts. The belts on the second pulleys (16) and the first pulleys (15) are used to make the second pulleys (16) move synchronously with the grinding belt (17).

5. A special grinding apparatus for the inner ring of an automotive wheel hub bearing according to claim 2, characterized in that: It also includes a movable frame (40), which is slidably connected to the support frame (1). The support frame (1) is provided with symmetrically distributed fifth drive modules (41), which are used to drive the movable frame (40) to move. The two sides of the movable frame (40) are respectively slidably connected to a first mounting frame (4201) and a second mounting frame (4202). The movable frame (40) is provided with symmetrically distributed fourth push rods (43), which are used to drive the first mounting frame (4201) and the second mounting frame (4202) respectively. The mounting bracket (4202) moves, and the second mounting bracket (4202) is rotatably connected to symmetrically distributed friction wheels (44). The second mounting bracket (4202) is provided with a seventh drive module (45) for driving the symmetrically distributed friction wheels (44) to rotate. The second mounting bracket (4202) is slidably connected to a positioning rod (46). The symmetrically distributed friction wheels (44) are all in contact with the positioning rod (46). The first mounting bracket (4201) is fixedly connected to a support block (47), which is used to support one end of the positioning rod (46).

6. A special grinding apparatus for the inner ring of an automotive wheel hub bearing according to claim 5, characterized in that: Two rotating blocks (51) are rotatably connected to the first mounting bracket (4201). An eighth driving module (52) is provided on the first mounting bracket (4201). The eighth driving module (52) is used to drive the two rotating blocks (51) to rotate. The rotating blocks (51) are threadedly connected to a second screw (53). The two second screws (53) are fixedly connected to a push plate (54). An array of first guide plates (55) and array of second guide plates (56) are fixedly connected to the support frame (1). The array of first guide plates (55), array of second guide plates (56) and array of fixed frames (2) correspond one-to-one. The first guide plate (55) and the second guide plate (56) are both fixedly connected to the corresponding fixed frame (2). The second guide plate (56) is used to guide the workpiece.

7. A special grinding apparatus for the inner ring of an automotive wheel hub bearing according to claim 6, characterized in that: The second guide plate (56) of the array distribution has an increasing inclination from the side closer to the second mounting bracket (4202) to the side farther away.

8. A special grinding apparatus for the inner ring of an automotive wheel hub bearing according to claim 6, characterized in that: The first guide plate (55) is slidably connected to the extrusion plate (57), and the extrusion plate (57) and the first guide plate (55) are fixedly connected to symmetrically distributed second elastic elements. The extrusion plate (57) and the corresponding second guide plate (56) are used together to position the workpiece.

9. A special grinding apparatus for the inner ring of an automotive wheel hub bearing according to claim 8, characterized in that: Both the extrusion plate (57) and the second guide plate (56) are equipped with rotating balls to ensure smooth operation of the workpiece during movement.

10. A special grinding apparatus for the inner ring of an automotive wheel hub bearing according to claim 9, characterized in that: The L-shaped rod (5) and the sliding rod (6) are slidably connected to the corresponding second positioning post (8). A sensor (60) is provided on both the L-shaped rod (5) and the sliding rod (6). A third elastic element is fixed between the sensor (60) and the corresponding second positioning post (8). A ninth drive module (61) is provided on the first mounting bracket (4201). The ninth drive module (61) is used to drive the positioning rod (46) to rotate.

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