Polishing device for universal joint fork lug hole

Abstract

The invention relates to the technical field of universal joint fork lug hole grinding, and discloses a universal joint fork lug hole grinding device which comprises a workbench, a fixing mechanism used for fixing a universal joint fork and two grinding mechanisms provided with grinding machines in a clamping mode are arranged on the workbench, and the fixing mechanism comprises a rotating ring rotationally connected to the workbench; gear teeth are arranged on the outer side of the rotating ring, a jacking device and a supporting device are arranged on the inner side of the rotating ring, a jacking block is arranged in the jacking device and provided with a jacking face, a supporting seat is arranged in the supporting device, a shaft rod part of the universal joint fork slides in the supporting seat, and a supporting spring is further arranged in the supporting seat. The jacking block is used for pushing the earhole to the position concentric with the rotating ring, the rotating ring is driven by the connecting driving mechanism to rotate, and a grinding head on the grinding machine is tangent to the side, close to the jacking device, in the earhole. The device has the advantages that the lug hole is accurately positioned, the polishing head and the yoke rotate simultaneously to improve the polishing precision, and the polishing strength can be adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of universal joint fork ear hole grinding, in particular to a universal joint fork ear hole grinding device. Background Art

[0002] In the field of modern mechanical manufacturing, the transmission shaft is a key component for transmitting power in various mechanical equipment. The quality of its universal joint fork directly affects the performance and reliability of the entire transmission system. As an important part connecting the transmission shaft with other components, the universal joint fork ear hole has strict requirements on its processing accuracy and surface quality.

[0003] The traditional process of grinding the ear holes of universal joint forks mainly relies on manual operation. Workers use hand-held sandpaper, grinding wheels and other tools to grind the ear holes. This method is not only inefficient, but also difficult to ensure the consistency of the grinding quality of each ear hole. Due to the instability of manual operation, it is easy to cause problems such as dimensional accuracy deviation of the ear holes, uneven surface roughness, and excessive grinding marks, which in turn affect the assembly accuracy and service life of the universal joint fork. For example, in the automobile manufacturing industry, due to poor grinding quality of the ear holes of the universal joint fork, it may cause vibration of the drive shaft during operation, increased noise, and even premature wear of the connection parts, which reduces the driving comfort and safety of the car, while increasing the after-sales maintenance costs and the frequency of parts replacement.

[0004] The equipment for grinding ear holes in the prior art has the following defects: the ear hole grinding device of a transmission shaft universal joint fork with patent publication number CN222222026U uses two grinders to grind from both sides. Due to the inaccurate position of the grinding head, it is easy to cause asymmetric grinding of the two ear holes; the ear hole grinding device of a universal joint fork with patent publication number CN111922804B installs a longer grinding head on a grinder to grind two ear holes at the same time. Due to the swing of the overly long grinding head during rotation, it is easy to cause asymmetric grinding of the two ear holes. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides a grinding device for the ear holes of a universal joint fork, which has the advantages of precise positioning of the ear holes, simultaneous rotation of the grinding head and the yoke to improve the grinding accuracy, and adjustable grinding force. It solves the problem in the prior art of asymmetric grinding of the two ear holes due to inaccurate positioning of the No. 2 ear hole of the grinding head.

[0006] (II) Technical solution To achieve the above object, the present invention provides the following technical solutions: A grinding device for ear holes of a universal joint fork comprises a workbench, the workbench is provided with a fixing mechanism for fixing the universal joint fork and two grinding mechanisms with grinders clamped thereon, the fixing mechanism comprises a rotating ring rotatably connected to the workbench, the outer side of the rotating ring is provided with gear teeth, and the inner side is provided with a pressing device and a supporting device at symmetrical positions respectively, the pressing device is provided with a pressing block for sliding downward, the pressing block is provided with a pressing surface that fits the yoke part of the universal joint fork, the supporting device is provided with a supporting seat, the shaft part of the universal joint fork slides in the supporting seat, and the supporting seat is also provided with a supporting spring, the pressing block is used to push the ear hole to a position concentric with the rotating ring, the rotating ring is driven to rotate by a connecting driving mechanism, and the grinding head on the grinder is tangent to a side of the ear hole close to the pressing device; The top pressure block pushes the universal joint fork to slide a specified distance so that the ear hole and the rotating ring are concentric. When the rotating ring rotates, it drives the ear hole to rotate around the center of the circle. At this time, the two grinding heads on both sides rotate tangentially on the inner sides of the two ear holes respectively. The positioning of the ear holes is completed under the action of the top pressure device. The rotation of the ear holes around the center of the circle can make the grinding of the two grinding heads more uniform. When the rotation speed of the rotating ring is increased, the universal joint fork slides to the side away from the top pressure device under the action of centrifugal force, thereby increasing the fitting strength between the inner side of the ear hole and the grinding head, thereby achieving the purpose of controlling the grinding strength by adjusting the rotation speed of the rotating ring and the tightness of the supporting spring.

[0007] Preferably, the top pressure block is respectively provided with a No. 1 positioning column on both sides close to the ear hole, and the No. 1 positioning column is located at a position concentric with the ear hole. A No. 2 positioning column is provided at the end of the grinding head, and the No. 2 positioning column is concentric with the grinding head. When the grinding head is grinding, the side of the No. 2 positioning column close to the supporting device is tangent to the No. 1 positioning column. When the grinding head is grinding the ear hole, the tangency of the No. 1 positioning column and the No. 2 positioning column not only serves to position the two grinding heads, but also serves to improve the stability of the end face of the grinding head.

[0008] Preferably, at least one pressure sensing block is provided on the top pressure surface at a position where it fits with the universal joint fork, the pressure sensing block is slidably connected in the top pressure block, a spring is connected to the inner side of the pressure sensing block, and a pressure sensor is connected to the side of the spring away from the pressure sensing block. The pressure sensing block can not only detect whether the top pressure surface is tightly fitted on the universal joint fork when positioning the ear hole, but also detect the displacement of the universal joint fork caused by the centrifugal force when the rotating ring rotates.

[0009] Preferably, the end face of the No. 1 positioning column is attached to the end face of the grinding head or the end face of the No. 2 positioning column is attached to the side face of the top pressure block.

[0010] Preferably, the workbench is arranged on the top of the frame, and the frame is further provided with a partition below the workbench, and the driving mechanism includes a driving motor arranged on the frame, a pulley is arranged on the output shaft of the driving motor, a conveyor belt is connected to the pulley, the other side of the conveyor belt is sleeved on another pulley, and the other pulley is fixedly connected to a gear through an axis rod, and gear teeth meshing with a rotating ring are arranged on the outer side of the gear, and the rotation of the gear drives the rotating ring to rotate, the axis rod of the gear is rotatably connected to the partition, and the gear is located below the rotating ring.

[0011] Preferably, the conveyor belt is a belt or a chain.

[0012] Preferably, the grinding mechanism includes a clamp for clamping the grinder, the clamp is connected to the lifting seat for forward and backward sliding, the clamp is connected to the output shaft of the pushing device on the lifting seat, the lifting seat is connected to the top of the sliding seat for upward and downward sliding, the lifting seat is connected to the output shaft of the pushing device on the sliding seat, the sliding seat is connected to the workbench for left and right sliding, a plurality of rods passing through the sliding seat are arranged on the workbench, one of the rods is a screw rod with a thread, the sliding seat is rotationally connected to the screw rod by a thread, and the surfaces of the other rods are smooth and are slidingly connected to the sliding seat.

[0013] Preferably, the supporting device includes a supporting seat, which is fixed to the inner side of the rotating ring through a lower L-shaped plate, and the lower L-shaped plate is detachably connected to the rotating ring through bolts, and the supporting seat is detachably connected to the lower L-shaped plate through bolts, and an internal spline is provided on the inner side of the supporting seat, which fits with the external spline on the outer side of the shaft portion of the universal joint fork.

[0014] Preferably, the pressing device includes a pressing seat, which is fixed to the inner side of the rotating ring through an upper L-shaped plate, and the upper L-shaped plate is detachably connected to the rotating ring through bolts, and the pressing seat is detachably connected to the upper L-shaped plate through bolts, and a pressing rod which slides up and down is arranged in the upper L-shaped plate, and the pressing block is arranged on the end of the pressing rod away from the pressing seat.

[0015] Preferably, the rotating ring is fixed on the workbench for rotation via a rotating ring fixing seat, and two front and rear symmetrical rotating ring fixing seats are arranged on the workbench, and each rotating ring fixing seat includes two left-right symmetrical fixing plates, and the fixing plates are attached to the sides of the rotating ring, and an intermediate block is arranged between the two fixing plates, and the thickness of the intermediate block is consistent with the thickness of the rotating ring, and a protrusion is arranged on the inner side of the fixing plate, and a limiting ring groove is arranged on the side of the rotating ring, and when the rotating ring rotates, the protrusion is stuck in the limiting ring groove and slides, and the two fixing plates are fixed to the intermediate block by bolts, and the fixing plate is fixed to the workbench by bolts.

[0016] (III) Beneficial effects Compared with the prior art, the present invention provides a grinding device for a universal joint fork ear hole, which has the following beneficial effects: 1. The grinding device for the ear hole of the universal joint fork sets the universal joint fork on a rotatable rotating ring, and uses a top pressure block to press down the universal joint fork to make the ear hole concentric with the rotating ring, thereby completing the positioning of the ear hole and at the same time making the rotating ring drive the ear hole to rotate around the center of the circle when the rotating ring rotates. When grinding, the grinding head is tangent to the side of the inner side of the ear hole away from the top pressure device. While completing the precise positioning of the ear hole by the top pressure block, the invention improves the grinding accuracy by using the simultaneous rotation of the ear hole and the grinding head, and can also control the grinding force of the grinding head by adjusting the rotation speed of the rotating ring and the tightness of the support spring.

[0017] 2. The grinding device for the ear hole of the universal joint fork is provided with a No. 1 positioning column on the side of the top pressure block and a No. 2 positioning column on the end face of the grinding head. The No. 1 positioning column is concentric with the ear hole, and the No. 2 positioning column is concentric with the grinding head. When the grinding head is grinding the ear hole, the No. 1 positioning column is tangent to the No. 2 positioning column, which not only plays a role in positioning the two grinding heads, but also plays a role in improving the stability of the end face of the grinding head.

[0018] 3. The grinding device for the ear hole of the universal joint fork is provided with a pressure sensing block on the top pressure surface. The pressure sensing block is slidably connected in the top pressure block. A spring is connected to the inner side of the pressure sensing block. The side of the spring away from the pressure sensing block is connected to the pressure sensor. The pressure sensing block can not only detect whether the top pressure surface is tightly fitted on the universal joint fork when positioning the ear hole, but also detect the displacement of the universal joint fork caused by the centrifugal force when the rotating ring rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the driving mechanism of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the grinding mechanism of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the grinding head of the present invention.

[0023] Figure 5 It is an exploded view of the fixing mechanism and the rotating ring fixing seat of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the fixing mechanism of the present invention.

[0025] Figure 7 It is a half-section view of the universal joint fork of the present invention installed in the supporting device.

[0026] Figure 8It is a structural schematic diagram of the top pressing device of the present invention.

[0027] Fig. 9 It is a schematic structural diagram of the top pressure block of the present invention.

[0028] Fig.10 It is a schematic structural diagram of the rotating ring fixing seat of the present invention.

[0029] Fig.11 It is a cross-sectional view of the fixing mechanism of the present invention.

[0030] Fig.12 For the present invention Fig.11 A partial enlarged view of area A.

[0031] In the figure: 10, frame; 11, workbench; 12, partition; 2, universal joint fork; 21, ear hole; 3, fixing mechanism; 4, grinding mechanism; 5, driving mechanism; 6, rotating ring fixing seat; 31, rotating ring; 32, pressing device; 33, supporting device; 311, limiting ring groove; 321, pressing seat; 322, pressing rod; 323, upper L-shaped plate; 324, pressing block; 3241, pressing surface; 3242, positioning column No. 1; 3243, pressure sensing block; 331, support seat; 332, support spring; 333, lower L-shaped plate; 41, grinding head; 411, positioning column No. 2; 42, grinding machine; 43, fixture; 44, lifting seat; 45, sliding seat; 46, screw; 51, driving motor; 52, conveyor belt; 53, gear; 61, fixing plate; 62, middle block; 63, protrusion. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, a fixed connection refers to a connection in which there is no relative movement after the parts or components are fixed; a transmission connection refers to a connection method in which mechanical motion or torque is transmitted to other working parts through a transmission part; a sliding connection refers to a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotating connection refers to a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] Embodiment 1: This embodiment provides a grinding device for a universal joint fork ear hole, which has the following technical features.

[0037] See also Figure 1-12 A grinding device for a universal joint fork ear hole comprises a workbench 11, on which a fixing mechanism 3 for fixing a universal joint fork 2 and two grinding mechanisms 4 with grinders 42 clamped are provided, the fixing mechanism 3 comprises a rotating ring 31 rotatably connected to the workbench 11, gear teeth are arranged on the outer side of the rotating ring 31, and a pressing device 32 and a supporting device 33 are arranged at symmetrical positions on the inner side, a pressing block 324 for sliding downward pressing is arranged in the pressing device 32, and the pressing block 324 is provided with A pressing surface 3241 is fitted with the yoke part of the universal joint 2, a support seat 331 is arranged in the support device 33, the shaft part of the universal joint 2 slides in the support seat 331, a support spring 332 is also arranged in the support seat 331, and the pressing block 324 is used to push the ear hole 21 to a position concentric with the rotating ring 31, and the rotating ring 31 is driven to rotate by connecting the driving mechanism 5, and the grinding head 41 on the grinding machine 42 is tangent to the side of the ear hole 21 close to the pressing device 32; The pressing block 324 pushes the universal joint fork 2 to slide a specified distance so that the ear hole 21 is concentric with the rotating ring 31. When the rotating ring 31 rotates, it drives the ear hole 21 to rotate around the center of the circle. At this time, the two grinding heads 41 on both sides rotate tangentially on the inner sides of the two ear holes 21 respectively. Under the action of the pressing device 32, the positioning of the ear hole 21 is completed. The rotation of the ear hole 21 around the center of the circle can make the grinding of the two grinding heads 41 more uniform. When the rotation speed of the rotating ring 31 is increased, under the action of centrifugal force, the universal joint fork 2 slides to the side away from the pressing device 32, thereby increasing the fitting strength between the inner side of the ear hole 21 and the grinding head 41, thereby achieving the purpose of controlling the grinding strength by adjusting the rotation speed of the rotating ring 31 and the tightness of the support spring 332.

[0038] In an optional embodiment, a No. 1 positioning column 3242 is respectively provided on both sides of the top pressure block 324 near the ear hole 21, and the No. 1 positioning column 3242 is located at a position concentric with the ear hole 21. A No. 2 positioning column 411 is provided at the end of the grinding head 41, and the No. 2 positioning column 411 is concentric with the grinding head 41. When the grinding head 41 is grinding, the side of the No. 2 positioning column 411 close to the supporting device 33 is tangent to the No. 1 positioning column 3242. When the grinding head 41 is grinding the ear hole 21, the No. 1 positioning column 3242 is tangent to the No. 2 positioning column 411, which not only serves to position the two grinding heads 41, but also serves to improve the stability of the end face of the grinding head 41.

[0039] In an optional embodiment, at least one pressure sensing block 3243 is provided on the top pressure surface 3241 at a position in contact with the universal joint fork 2. The pressure sensing block 3243 is slidably connected in the top pressure block 324. A spring is connected to the inner side of the pressure sensing block 3243. A pressure sensor is connected to the side of the spring away from the pressure sensing block 3243. The pressure sensing block 3243 can not only detect whether the top pressure surface 3241 is tightly fitted on the universal joint fork 2 when positioning the ear hole 21, but also detect the displacement of the universal joint fork 2 caused by the centrifugal force when the rotating ring 31 rotates.

[0040] In an optional embodiment, the end surface of the No. 1 positioning column 3242 is attached to the end surface of the grinding head 41 or the end surface of the No. 2 positioning column 411 is attached to the side surface of the top pressure block 324 .

[0041] In an optional embodiment, a workbench 11 is arranged on the top of a frame 10, and a partition 12 is further arranged below the workbench 11 of the frame 10. The driving mechanism 5 includes a driving motor 51 arranged on the frame 10, and a pulley is arranged on the output shaft of the driving motor 51, and a conveyor belt 52 is connected to the pulley. The other side of the conveyor belt 52 is sleeved on another pulley, and the other pulley is fixedly connected to a gear 53 through an axis rod. Gear teeth meshing with the rotating ring 31 are arranged on the outer side of the gear 53. The rotation of the gear 53 drives the rotating ring 31 to rotate. The axis rod of the gear 53 is rotatably connected to the partition 12, and the gear 53 is located below the rotating ring 31.

[0042] In an optional embodiment, the conveyor belt 52 is a belt or a chain.

[0043] In an optional embodiment, the grinding mechanism 4 includes a clamp 43 for clamping the grinder 42, the clamp 43 is connected to the lifting seat 44 for sliding forward and backward, the clamp 43 is connected to the output shaft of the pushing device on the lifting seat 44, the lifting seat 44 is connected to the top of the sliding seat 45 for sliding up and down, the lifting seat 44 is connected to the output shaft of the pushing device on the sliding seat 45, the sliding seat 45 is connected to the workbench 11 for sliding left and right, and a plurality of rods passing through the sliding seat 45 are provided on the workbench 11, one of the rods is a threaded screw 46, the sliding seat 45 is rotationally connected to the screw rod 46 by a thread, and the surfaces of the other rods are smooth and are slidably connected to the sliding seat 45.

[0044] In an optional embodiment, the supporting device 33 includes a supporting seat 331, which is fixed to the inner side of the rotating ring 31 through a lower L-shaped plate 333, and the lower L-shaped plate 333 is detachably connected to the rotating ring 31 through bolts. The supporting seat 331 is detachably connected to the lower L-shaped plate 333 through bolts, and an internal spline is provided on the inner side of the supporting seat 331, which fits with the external spline on the outer side of the shaft portion of the universal joint fork 2.

[0045] In an optional embodiment, the pressing device 32 includes a pressing seat 321, which is fixed to the inner side of the rotating ring 31 through an upper L-shaped plate 323, and the upper L-shaped plate 323 is detachably connected to the rotating ring 31 through bolts. The pressing seat 321 is detachably connected to the upper L-shaped plate 323 through bolts, and a pressing rod 322 that slides up and down is arranged in the upper L-shaped plate 323, and a pressing block 324 is arranged on the pressing rod 322 at the end away from the pressing seat 321.

[0046] In an optional embodiment, the rotating ring 31 is fixed on the workbench 11 for rotation via a rotating ring fixing seat 6. Two symmetrical rotating ring fixing seats 6 are arranged on the workbench 11. Each rotating ring fixing seat 6 includes two left-right symmetrical fixing plates 61. The fixing plates 61 are attached to the sides of the rotating ring 31. An intermediate block 62 is arranged between the two fixing plates 61. The thickness of the intermediate block 62 is consistent with the thickness of the rotating ring 31. A protrusion 63 is arranged on the inner side of the fixing plate 61. A limiting ring groove 311 is arranged on the side of the rotating ring 31. When the rotating ring 31 rotates, the protrusion 63 is stuck in the limiting ring groove 311 and slides. The two fixing plates 61 are fixed to the intermediate block 62 by bolts, and the fixing plate 61 is fixed to the workbench 11 by bolts.

[0047] It should be noted that the pushing devices on the lifting seat 44 and the sliding seat 45 are hydraulic pushing devices.

[0048] It should be noted that the pressing seat 321 is a wire-pulling cylinder, which pushes the pressing block 324 to a specified distance before the rotating ring 31 starts to rotate, and disconnects the input oil pipe and the output oil pipe of the pressing seat 321 when the rotating ring 31 starts to rotate, or the input oil cylinder and the output oil cylinder of the pressing seat 321 are set on the rotating ring 31.

[0049] It should be noted that the pressing seat 321 and the pressing rod 322 are manual push rod structures, and the tail of the pressing rod 322 is connected with a pull wire, and the sliding distance of the pressing rod 322 is detected by the pull wire. After the pressing rod 322 slides a specified distance, the pressing rod 322 is locked by a bolt set on the pressing seat 321.

[0050] It should be noted that the input end of the screw rod 46 is connected to the output shaft of the rotating wheel or the motor.

[0051] It should be noted that the pressing block 324 is detachably connected to the end of the pressing rod 322 , and the connection between the pressing block 324 and the pressing rod 322 is fixed by threads, so that different types of pressing blocks 324 can be replaced according to different sizes of universal joint forks 2 .

[0052] To summarize, the grinding device for the ear hole of the universal joint fork sets the universal joint fork 2 on a rotatable rotating ring 31, and uses the top pressure block 324 to press down the universal joint fork 2 to make the ear hole 21 concentric with the rotating ring 31, thereby completing the positioning of the ear hole 21 and at the same time allowing the rotating ring 31 to rotate and drive the ear hole 21 to rotate around the center of the circle, and the grinding head 41 is tangent to the side of the inner side of the ear hole 21 away from the top pressure device 32 during grinding. This invention not only completes the precise positioning of the ear hole 21 through the top pressure block 324, but also improves the grinding accuracy by utilizing the simultaneous rotation of the ear hole 21 and the grinding head 41, and can also control the grinding force of the grinding head 41 by adjusting the rotation speed of the rotating ring 31 and the tightness of the support spring 332.

[0053] The grinding device for the ear hole of the universal joint fork is provided with a No. 1 positioning column 3242 on the side of the top pressure block 324, and a No. 2 positioning column 411 is provided on the end face of the grinding head 41. The No. 1 positioning column 3242 is concentric with the ear hole 21, and the No. 2 positioning column 411 is concentric with the grinding head 41. When the grinding head 41 is grinding the ear hole 21, the No. 1 positioning column 3242 is tangent to the No. 2 positioning column 411, which not only plays a role in positioning the two grinding heads 41, but also plays a role in improving the stability of the end face of the grinding head 41.

[0054] The grinding device for the ear hole of the universal joint fork is provided with a pressure sensing block 3243 on the top pressure surface 3241. The pressure sensing block 3243 is slidably connected in the top pressure block 324. A spring is connected to the inner side of the pressure sensing block 3243. The side of the spring away from the pressure sensing block 3243 is connected to a pressure sensor. The pressure sensing block 3243 can not only detect whether the top pressure surface 3241 is tightly fitted on the universal joint fork 2 when positioning the ear hole 21, but also detect the displacement of the universal joint fork 2 caused by the centrifugal force when the rotating ring 31 rotates.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding device for a universal joint fork ear hole, comprising a workbench (11), characterized in that: The workbench (11) is provided with a fixing mechanism (3) for fixing the universal joint fork (2) and two grinding mechanisms (4) with grinders (42) clamped thereon; The fixing mechanism (3) comprises a rotating ring (31) rotatably connected to the workbench (11), wherein gear teeth are arranged on the outer side of the rotating ring (31), and a pressing device (32) and a supporting device (33) are arranged at symmetrical positions on the inner side. The pressing device (32) is provided with a pressing block (324) that slides downward, and the pressing block (324) is provided with a pressing surface (3241) that fits with the yoke portion of the universal joint (2); A support seat (331) is provided in the support device (33), the shaft portion of the universal joint fork (2) slides in the support seat (331), and a support spring (332) is also provided in the support seat (331); The pressing block (324) is used to push the ear hole (21) to a position concentric with the rotating ring (31); the rotating ring (31) is driven to rotate by connecting to a driving mechanism (5); and the grinding head (41) on the grinding machine (42) is tangent to a side of the ear hole (21) close to the pressing device (32).

2. A grinding device for a universal joint fork ear hole according to claim 1, characterized in that: The top pressure block (324) is provided with first positioning columns (3242) on both sides close to the ear hole (21), the first positioning columns (3242) are located at a position concentric with the ear hole (21), and the end of the grinding head (41) is provided with a second positioning column (411), the second positioning column (411) is concentric with the grinding head (41); When the grinding head (41) is grinding, the side of the second positioning column (411) close to the support device (33) is tangent to the first positioning column (3242). When the grinding head (41) is grinding the ear hole (21), the tangent of the first positioning column (3242) and the second positioning column (411) not only plays a role in positioning the two grinding heads (41), but also plays a role in improving the stability of the end surface of the grinding head (41).

3. A grinding device for a universal joint fork ear hole according to claim 2, characterized in that: At least one pressure sensing block (3243) is arranged on the top pressure surface (3241) at a position in contact with the universal joint fork (2); the pressure sensing block (3243) is slidably connected inside the top pressure block (324); a spring is connected inside the pressure sensing block (3243); and a pressure sensor is connected to a side of the spring away from the pressure sensing block (3243).

4. A grinding device for a universal joint fork ear hole according to claim 2, characterized in that: The end surface of the first positioning column (3242) is attached to the end surface of the grinding head (41), or the end surface of the second positioning column (411) is attached to the side surface of the top pressure block (324).

5. A grinding device for a universal joint fork ear hole according to claim 1, characterized in that: The workbench (11) is arranged on the top of the frame (10), and the frame (10) is further provided with a partition (12) below the workbench (11); The driving mechanism (5) comprises a driving motor (51) arranged on a frame (10); a pulley is arranged on an output shaft of the driving motor (51); a conveyor belt (52) is connected to the pulley; the other side of the conveyor belt (52) is sleeved on another pulley; the other pulley is fixedly connected to a gear (53) via a shaft; gear teeth meshing with a rotating ring (31) are arranged on the outer side of the gear (53); the rotation of the gear (53) drives the rotating ring (31) to rotate; the shaft of the gear (53) is rotatably connected to the partition (12); the gear (53) is located below the rotating ring (31).

6. A grinding device for a universal joint fork ear hole according to claim 5, characterized in that: The conveyor belt (52) is a belt or a chain.

7. A grinding device for a universal joint fork ear hole according to claim 1, characterized in that: The grinding mechanism (4) comprises a clamp (43) for clamping the grinder (42), the clamp (43) being slidably connected to a lifting seat (44) in a forward and backward manner, the clamp (43) being connected to an output shaft of a pushing device on the lifting seat (44), the lifting seat (44) being slidably connected above a sliding seat (45) in an upward and downward manner, the lifting seat (44) being connected to an output shaft of a pushing device on the sliding seat (45), the sliding seat (45) being slidably connected to a workbench (11) in a leftward and rightward manner, a plurality of rods passing through the sliding seat (45) being arranged on the workbench (11), one of the rods being a screw rod (46) with a thread, the sliding seat (45) being rotatably connected to the screw rod (46) by a thread, and the other rods having smooth surfaces and being slidably connected to the sliding seat (45).

8. A grinding device for a universal joint fork ear hole according to claim 1, characterized in that: The support device (33) comprises a support seat (331), the support seat (331) being fixed to the inner side of the rotating ring (31) via a lower L-shaped plate (333), the lower L-shaped plate (333) being detachably connected to the rotating ring (31) via bolts, the support seat (331) being detachably connected to the lower L-shaped plate (333) via bolts, and an internal spline being arranged on the inner side of the support seat (331) and being fitted with an external spline on the outer side of the shaft portion of the universal joint fork (2).

9. A grinding device for a universal joint fork ear hole according to claim 1, characterized in that: The pressing device (32) comprises a pressing seat (321), the pressing seat (321) being fixed to the inner side of the rotating ring (31) via an upper L-shaped plate (323), the upper L-shaped plate (323) being detachably connected to the rotating ring (31) via bolts, the pressing seat (321) being detachably connected to the upper L-shaped plate (323) via bolts, a pressing rod (322) being arranged in the upper L-shaped plate (323) and being capable of sliding up and down, and the pressing block (324) being arranged at an end of the pressing rod (322) away from the pressing seat (321).

10. A grinding device for a universal joint fork ear hole according to claim 1, characterized in that: The rotating ring (31) is fixed to the workbench (11) for rotation via a rotating ring fixing seat (6). The workbench (11) is provided with two symmetrical rotating ring fixing seats (6) at the front and rear ends. Each rotating ring fixing seat (6) includes two left-right symmetrical fixing plates (61). The fixing plates (61) are attached to the side surfaces of the rotating ring (31). An intermediate block (62) is provided between the two fixing plates (61). The thickness of the intermediate block (62) is consistent with that of the rotating ring (31). A protrusion (63) is provided on the inner side of the fixing plate (61). A limiting ring groove (311) is provided on the side surface of the rotating ring (31). When the rotating ring (31) rotates, the protrusion (63) is stuck in the limiting ring groove (311) and slides. The two fixing plates (61) and the intermediate block (62) are fixed by bolts. The fixing plate (61) is fixed to the workbench (11) by bolts.

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