A grinding device for the ear hole of a universal joint fork

Abstract

The present invention relates to the technical field of grinding for the ear holes of universal joint forks, and discloses a grinding device for the ear holes of universal joint forks, which includes a workbench. A fixing mechanism for fixing the universal joint fork and two grinding mechanisms with grinding machines clamped thereon are provided on the workbench. The fixing mechanism includes a rotating ring rotatably connected to the workbench. Gear teeth are arranged on the outer side of the rotating ring, and a pressing device and a supporting device are arranged on the inner side. A pressing block is arranged in the pressing device, and the pressing block is provided with a pressing surface. A supporting seat is arranged in the supporting device. The shaft rod part of the universal joint fork slides in the supporting seat, and a supporting spring is also arranged in the supporting seat. 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 through a connecting drive mechanism. The grinding head on the grinding machine is tangent to the side of the ear hole close to the pressing device. The present invention has the advantages of accurately positioning the ear hole, improving the grinding accuracy by rotating the grinding head and the joint fork simultaneously, and being able to adjust the grinding force.

Description

Technical Field

[0001] The present invention relates to the technical field of universal joint fork ear hole grinding, and specifically provides a grinding device for universal joint fork ear holes. Background Art

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

[0003] Traditional universal joint fork ear hole grinding processes mainly rely on manual operations. Workers hold tools such as sandpaper and grinding wheels 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 operations, it is easy to cause problems such as dimensional accuracy deviation of the ear holes, uneven surface roughness, and too deep grinding marks, thereby affecting the assembly accuracy and service life of the universal joint fork. For example, in the automotive manufacturing industry, poor grinding quality of the universal joint fork ear holes may cause vibrations, increased noise, and even premature wear of the connection parts during the operation of the drive shaft, reducing the driving comfort and safety of the vehicle, and at the same time increasing the after-sales maintenance cost and the frequency of component replacement.

[0004] The existing equipment for grinding ear holes has the following defects: A grinding device for the ear holes of a drive shaft universal joint fork with the patent publication number CN222222026U uses two grinding machines to grind from both sides. Due to the inaccurate position of the grinding heads, it is easy to cause asymmetric grinding of the two ear holes; A grinding device for universal joint fork ear holes with the patent publication number CN111922804B installs a relatively long grinding head on one grinding machine to grind two ear holes simultaneously. Due to the swing of the long grinding head during rotation, it is easy to cause asymmetric grinding of the two ear holes. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the existing technology, the present invention provides a grinding device for universal joint fork ear holes, which has the advantages of accurately positioning the ear holes, simultaneously rotating the grinding head and the joint fork to improve the grinding accuracy, and adjustable grinding force, and solves the problem of asymmetric grinding of the two ear holes caused by inaccurate positioning of the second ear hole of the grinding head in the existing technology.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A grinding device for the ear hole of a universal joint fork, comprising a workbench, on which a fixing mechanism for fixing the universal joint fork and two grinding mechanisms with grinding machines clamped are provided. The fixing mechanism includes a rotating ring rotatably connected to the workbench. Gear teeth are arranged on the outer side of the rotating ring, and a pressing device and a supporting device are respectively arranged at symmetric positions on the inner side. A pressing block that slides downward is arranged in the pressing device. The pressing block is provided with a pressing surface that fits the fork part of the universal joint fork. A supporting seat is arranged in the supporting device. The shaft rod part of the universal joint fork slides in the supporting seat. A supporting spring is also arranged in the supporting seat. 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. The grinding head on the grinding machine is tangent to one side of the ear hole close to the pressing device;

[0010] After the pressing block pushes the universal joint fork to slide a specified distance, the ear hole is concentric with the rotating ring. When the rotating ring rotates, it drives the ear hole to rotate around the center. At this time, the two grinding heads on both sides are respectively tangent and rotate inside the two ear holes. Under the action of the pressing device, the positioning of the ear hole is completed. The rotation of the ear hole around the center can make the grinding of the two grinding heads more uniform. When increasing the rotation speed of the rotating ring, under the action of centrifugal force, the universal joint fork slides to the side away from the pressing device, thereby improving the fitting force between the inner side of the ear hole and the grinding head, and achieving the purpose of controlling the grinding force by adjusting the rotation speed of the rotating ring and the tightness of the supporting spring.

[0011] Preferably, first positioning columns are respectively arranged on both sides of the pressing block close to the ear hole. The first positioning columns are located at positions concentric with the ear hole. A second positioning column is arranged at the end of the grinding head. The second positioning column is concentric with the grinding head. When the grinding head is grinding, the side of the second positioning column close to the supporting device is tangent to the first positioning column. When the grinding head is grinding the ear hole, the tangency between the first positioning column and the second positioning column not only plays a role in positioning the two grinding heads, but also can improve the stability of the end face of the grinding head.

[0012] Preferably, at least one pressure sensing block is arranged at the position where the pressing surface fits the universal joint fork. The pressure sensing block is slidably connected in the pressing 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 a pressure sensor. The pressure sensing block can not only detect whether the pressing surface is closely attached to the universal joint fork when positioning the ear hole, but also can detect the displacement size generated by the universal joint fork under the action of centrifugal force when the rotating ring rotates.

[0013] Preferably, the end face of the first positioning column fits the end face of the grinding head or the end face of the second positioning column fits the side face of the pressing block.

[0014] Preferably, the workbench is arranged on the top of the frame. A partition is also arranged under the workbench in the frame. The driving mechanism includes a driving motor arranged on the frame. A belt pulley is arranged on the output shaft of the driving motor. A conveyor belt is connected to the belt pulley. The other side of the conveyor belt is sleeved on another belt pulley. The other belt pulley is fixedly connected with a gear through a shaft rod. Teeth meshing with the rotating ring are arranged outside the gear. The rotation of the gear drives the rotating ring to rotate. The shaft rod of the gear is rotatably connected to the partition. The gear is located below the rotating ring.

[0015] Preferably, the conveyor belt is a belt or a chain.

[0016] Preferably, the grinding mechanism includes a fixture for clamping a grinding machine. The fixture is slidably connected to the lifting seat in the front and back directions. The fixture is connected to the output shaft of a pushing device on the lifting seat. The lifting seat is slidably connected to the upper part of the sliding seat in the up and down directions. The lifting seat is connected to the output shaft of a pushing device on the sliding seat. The sliding seat is slidably connected to the workbench in the left and right directions. A plurality of rods passing through the sliding seat are arranged on the workbench. One of the rods is a threaded lead screw. The sliding seat is rotationally connected to the lead screw through a thread. The surfaces of the other rods are smooth and are slidably connected to the sliding seat.

[0017] Preferably, the supporting device includes a supporting seat. The supporting seat is fixed inside the rotating ring through a lower L-shaped plate. The lower L-shaped plate is detachably connected to the rotating ring through bolts. The supporting seat is detachably connected to the lower L-shaped plate through bolts. Internal splines are arranged inside the supporting seat and are fitted with external splines on the outer side of the shaft rod part of the universal joint fork.

[0018] Preferably, the pressing device includes a pressing seat. The pressing seat is fixed inside the rotating ring through an upper L-shaped plate. The upper L-shaped plate is detachably connected to the rotating ring through bolts. The pressing seat is detachably connected to the upper L-shaped plate through bolts. A pressing rod sliding up and down is arranged inside the upper L-shaped plate. The pressing block is arranged at the end of the pressing rod far from the pressing seat.

[0019] Preferably, the rotating ring is fixed on the workbench to rotate through a rotating ring fixing seat. Two symmetric rotating ring fixing seats are arranged in the front and back on the workbench. Each rotating ring fixing seat includes two symmetric fixing plates on the left and right. The fixing plates are attached to the side surface of the rotating ring. An intermediate block is arranged between the two fixing plates. The thickness of the intermediate block is the same as the thickness of the rotating ring. Protrusions are arranged inside the fixing plates. A limiting ring groove is arranged on the side surface of the rotating ring. When the rotating ring rotates, the protrusions are stuck in the limiting ring groove and slide. The two fixing plates and the intermediate block are fixed through bolts. The fixing plates are fixed on the workbench through bolts.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a grinding device for the ear hole of a universal joint fork, having the following beneficial effects:

[0022] 1. For the grinding device for the ear hole of the universal joint fork, by setting the universal joint fork on a rotatable rotating ring, and using a pressing block to press down the universal joint fork, making the ear hole concentric with the rotating ring. While completing the positioning of the ear hole, the rotating ring can drive the ear hole to rotate around the center when rotating. The grinding head is tangent to the side of the inner side of the ear hole away from the pressing device during grinding. The invention improves the grinding accuracy by using the simultaneous rotation of the ear hole and the grinding head while completing the precise positioning of the ear hole through the pressing block, 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.

[0023] 2. For the grinding device for the ear hole of the universal joint fork, by setting a first positioning column on the side of the pressing block and a second positioning column on the end face of the grinding head. The first positioning column is concentric with the ear hole, and the second positioning column is concentric with the grinding head. When the grinding head grinds the ear hole, the tangency between the first positioning column and the second positioning column not only plays a role in positioning the two grinding heads, but also can improve the stability of the end face of the grinding head.

[0024] 3. For the grinding device for the ear hole of the universal joint fork, by setting a pressure sensing block on the pressing surface, the pressure sensing block is slidably connected in the pressing 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 pressing surface is closely attached to the universal joint fork during the positioning of the ear hole, but also detect the displacement size generated by the centrifugal force of the universal joint fork when the rotating ring rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the driving mechanism of the present invention.

[0027] Figure 3 It is a schematic structural diagram of the grinding mechanism of the present invention.

[0028] Figure 4 It is a schematic structural diagram of the grinding head of the present invention.

[0029] Figure 5 It is an exploded view of the fixing mechanism and the rotating ring fixing seat of the present invention.

[0030] Figure 6 It is a schematic structural diagram of the fixing mechanism of the present invention.

[0031] Figure 7 It is a half-sectional view of the universal joint fork of the present invention installed in the support device.

[0032] Figure 8 This is a schematic structural diagram of the pressing device of the present invention.

[0033] Figure 9 This is a schematic structural diagram of the pressing block of the present invention.

[0034] Figure 10 This is a schematic structural diagram of the rotating ring fixing seat of the present invention.

[0035] Figure 11 This is a sectional view of the fixing mechanism of the present invention.

[0036] Figure 12 For the present invention Figure 11 A partial enlarged view of area A in the present invention.

[0037] 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, first positioning column; 3243, pressure sensing block; 331, supporting seat; 332, supporting spring; 333, lower L-shaped plate; 41, grinding head; 411, second positioning column; 42, grinding machine; 43, fixture; 44, lifting seat; 45, sliding seat; 46, lead screw; 51, driving motor; 52, conveyor belt; 53, gear; 61, fixing plate; 62, intermediate block; 63, convex block. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0040] In addition, a fixed connection means a connection where parts or components are fixed without any relative movement; a transmission connection means a connection method that transmits mechanical motion or torque to other working components through transmission parts; a sliding connection means a connection method where two objects are in contact but not fixed and can slide relative to each other; a rotational connection means a connection method where two objects are in contact but not fixed and can rotate relative to each other.

[0041] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0042] Embodiment 1:

[0043] This embodiment provides a grinding device for the ear hole of a universal joint fork, having the following technical features.

[0044] Please refer to Figures 1-12 , a grinding device for the ear hole of a universal joint fork, including a workbench 11, a fixing mechanism 3 for fixing the universal joint fork 2 and two grinding mechanisms 4 with grinding machines 42 clamped thereon are provided on the workbench 11. The fixing mechanism 3 includes a rotating ring 31 rotatably connected to the workbench 11. Gear teeth are provided on the outer side of the rotating ring 31, and a pressing device 32 and a supporting device 33 are respectively provided at symmetric positions on the inner side. A pressing block 324 that slides downward is provided in the pressing device 32. The pressing block 324 is provided with a pressing surface 3241 that fits the fork part of the universal joint fork 2. A supporting seat 331 is provided in the supporting device 33. The shaft part of the universal joint fork 2 slides in the supporting seat 331, and a supporting spring 332 is further provided in the supporting 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 a connecting drive mechanism 5. The grinding head 41 on the grinding machine 42 is tangent to one side of the ear hole 21 close to the pressing device 32;

[0045] After the pressing block 324 pushes the universal joint fork 2 to slide a specified distance, 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. At this time, the two grinding heads 41 on both sides are respectively tangent and rotate inside the two ear holes 21. The positioning of the ear hole 21 is completed under the action of the pressing device 32. The rotation of the ear hole 21 around the center can make the grinding of the two grinding heads 41 more uniform. When increasing the rotation speed of the rotating ring 31, under the action of centrifugal force, the universal joint fork 2 slides to the side away from the pressing device 32, thereby improving the fitting strength between the inner side of the ear hole 21 and the grinding head 41, and achieving the purpose of controlling the grinding force by adjusting the rotation speed of the rotating ring 31 and the tightness of the supporting spring 332.

[0046] In an alternative embodiment, first positioning posts 3242 are respectively arranged on both sides of the pressing block 324 close to the ear hole 21. The first positioning posts 3242 are located at positions concentric with the ear hole 21. A second positioning post 411 is arranged at the end of the grinding head 41. The second positioning post 411 is concentric with the grinding head 41. When the grinding head 41 is grinding, the side of the second positioning post 411 close to the supporting device 33 is tangent to the first positioning post 3242. When the grinding head 41 is grinding the ear hole 21, the tangency between the first positioning post 3242 and the second positioning post 411 not only plays a role in positioning the two grinding heads 41, but also can improve the stability of the end face of the grinding head 41.

[0047] In an alternative embodiment, at least one pressure sensing block 3243 is arranged on the pressing surface 3241 at the position where it fits with the universal joint fork 2. The pressure sensing block 3243 is slidably connected in the pressing 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 pressing surface 3241 is closely attached to the universal joint fork 2 when positioning the ear hole 21, but also can detect the displacement size generated by the centrifugal force on the universal joint fork 2 when the rotating ring 31 rotates.

[0048] In an alternative embodiment, the end face of the first positioning post 3242 fits with the end face of the grinding head 41 or the end face of the second positioning post 411 fits with the side of the pressing block 324.

[0049] In an alternative embodiment, the workbench 11 is arranged on the top of the frame 10. A partition 12 is further arranged under the workbench 11 of the frame 10. The driving mechanism 5 includes a driving motor 51 arranged on the frame 10. A belt pulley is arranged on the output shaft of the driving motor 51. A conveyor belt 52 is connected to the belt pulley. The other side of the conveyor belt 52 is sleeved on another belt pulley. The other belt pulley is fixedly connected with a gear 53 through a shaft rod. Teeth meshing with the rotating ring 31 are arranged on the outside of the gear 53. The rotation of the gear 53 drives the rotation of the rotating ring 31. The shaft rod of the gear 53 is rotatably connected to the partition 12. The gear 53 is located below the rotating ring 31.

[0050] In an alternative embodiment, the conveyor belt 52 is a belt or a chain.

[0051] In an alternative embodiment, the grinding mechanism 4 includes a fixture 43 for clamping a grinding machine 42. The fixture 43 is slidably connected to the lifting seat 44 in the front and rear directions. The fixture 43 is connected to the output shaft of the pushing device on the lifting seat 44. The lifting seat 44 is slidably connected to the upper part of the sliding seat 45 in the up and down directions. The lifting seat 44 is connected to the output shaft of the pushing device on the sliding seat 45. The sliding seat 45 is slidably connected to the workbench 11 in the left and right directions. A plurality of rods passing through the sliding seat 45 are arranged on the workbench 11. One of the rods is a threaded lead screw 46. The sliding seat 45 is rotationally connected to the lead screw 46 through a thread. The surfaces of the other rods are smooth and are slidably connected to the sliding seat 45.

[0052] In an alternative embodiment, the supporting device 33 includes a supporting seat 331. The supporting seat 331 is fixed to the inner side of the rotating ring 31 through a lower L-shaped plate 333. 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. An internal spline is arranged inside the supporting seat 331 and is fitted to the external spline on the outer side of the shaft rod portion of the universal joint fork 2.

[0053] In an alternative embodiment, the pressing device 32 includes a pressing seat 321. The pressing seat 321 is fixed to the inner side of the rotating ring 31 through an upper L-shaped plate 323. 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. A pressing rod 322 that slides up and down is arranged inside the upper L-shaped plate 323. A pressing block 324 is arranged at the end of the pressing rod 322 away from the pressing seat 321.

[0054] In an alternative embodiment, the rotating ring 31 is fixed to the workbench 11 through a rotating ring fixing seat 6 for rotation. Two symmetric rotating ring fixing seats 6 are arranged in the front and rear directions on the workbench 11. Each rotating ring fixing seat 6 includes two symmetric fixing plates 61 on the left and right. The fixing plates 61 are attached to the side surface 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 the same as the thickness of the rotating ring 31. A convex block 63 is arranged inside the fixing plate 61. A limiting ring groove 311 is arranged on the side surface of the rotating ring 31. When the rotating ring 31 rotates, the convex block 63 is stuck in the limiting ring groove 311 and slides. The two fixing plates 61 and the intermediate block 62 are fixed through bolts. The fixing plates 61 are fixed to the workbench 11 through bolts.

[0055] It should be noted that the pushing devices on the lifting seat 44 and the sliding seat 45 are hydraulic pushing devices.

[0056] It should be noted that the pressing seat 321 is a wire-pulling oil 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 output oil pipe of the pressing seat 321 when the rotating ring 31 starts to rotate. Or, the input oil cylinder and output oil cylinder of the pressing seat 321 are arranged on the rotating ring 31.

[0057] It should be noted that the pressing seat 321 and the pressing rod 322 are a manual push rod structure. The tail of the pressing rod 322 is connected to a wire, and the sliding distance of the pressing rod 322 is detected through the wire. After the pressing rod 322 slides a specified distance, the pressing rod 322 is locked by a bolt arranged on the pressing seat 321.

[0058] It should be noted that the input end of the lead screw 46 is connected to the output shaft of a rotating wheel or a motor.

[0059] 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 models of pressing blocks 324 can be replaced according to universal joint forks 2 of different sizes.

[0060] In summary, for the grinding device for the ear hole of the universal joint fork, by arranging the universal joint fork 2 on the rotatable rotating ring 31, pressing the universal joint fork 2 with the pressing block 324 to make the ear hole 21 concentric with the rotating ring 31, while completing the positioning of the ear hole 21, the rotating ring 31 can drive the ear hole 21 to rotate around the center when rotating. The grinding head 41 is tangent to the side of the ear hole 21 away from the pressing device 32 during grinding. The invention improves the grinding accuracy by using the simultaneous rotation of the ear hole 21 and the grinding head 41 while completing the precise positioning of the ear hole 21 through the pressing block 324, 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.

[0061] For the grinding device for the ear hole of the universal joint fork, a first positioning post 3242 is arranged on the side of the pressing block 324, and a second positioning post 411 is arranged on the end face of the grinding head 41. The first positioning post 3242 is concentric with the ear hole 21, and the second positioning post 411 is concentric with the grinding head 41. When the grinding head 41 grinds the ear hole 21, the tangency between the first positioning post 3242 and the second positioning post 411 not only plays a role in positioning the two grinding heads 41, but also improves the stability of the end face of the grinding head 41.

[0062] The grinding device for the ear hole of the universal joint fork is provided with a pressure sensing block 3243 on the pressing surface 3241. The pressure sensing block 3243 is slidably connected within the pressing block 324. A spring is connected to the inner side of the pressure sensing block 3243, and 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 pressing surface 3241 is closely attached to the universal joint fork 2 when positioning the ear hole 21, but also detect the displacement magnitude generated by the centrifugal force on the universal joint fork 2 when the rotating ring 31 rotates.

[0063] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0064] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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); 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).

2. A grinding device for a universal joint fork ear hole according to claim 1, 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).

3. A grinding device for a universal joint fork ear hole according to claim 1, 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).

4. 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).

5. A grinding device for a universal joint fork ear hole according to claim 4, characterized in that: The conveyor belt (52) is a belt or a chain.

6. 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).

7. 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).

8. 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).

9. 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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