Universal joint polishing device

Abstract

The present application relates to the technical field of polishing device, and specifically relates to a universal joint polishing device, which comprises a base, a back plate arranged on the base, two fixing seats arranged on the back plate, two moving blocks arranged on the two fixing seats, two abutting rods arranged on the two moving blocks, a rotating mechanism arranged between the two abutting rods and the two moving blocks, a moving mechanism arranged between the two moving blocks and the two fixing seats, two lifting plates symmetrically arranged on the back plate, a lifting seat arranged between the two lifting plates, a rotating mechanism arranged between the lifting seat and the base, a lifting mechanism arranged between the rotating mechanism and the base, and polishing devices symmetrically arranged on the back plate. The polishing device does not need manual shutdown, discharging, workpiece overturning and re-clamping, does not need manual intervention, will not interrupt the continuity of production, improves the production efficiency, and reduces the labor intensity and operation risk of the operator.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and specifically to a universal joint grinding device. Background Technology

[0002] Universal joint bearings are key components in automotive transmission systems and other mechanical structures that enable variable-angle power transmission. They typically refer to mechanical structures that use spherical or cross-shaped connections to transmit power between shafts with different axes or varying relative positions. A universal joint combined with a drive shaft constitutes a universal joint transmission device.

[0003] A typical cross-type universal joint bearing assembly mainly consists of a cross shaft, four needle roller bearings, and two universal joint forks. The cross shaft has four journals arranged in a cross shape, and each bearing is a cup-shaped structure that fits onto the journal of the cross shaft.

[0004] The outer cylindrical surface of the bearing is the key surface for achieving a precise interference or transition fit with the universal joint fork seat bore. Grinding this surface is to obtain extremely high dimensional accuracy, cylindricity and surface finish, to ensure assembly coaxiality, and to enable the bearing to bear radial load evenly in the seat bore, preventing fretting wear.

[0005] In the traditional universal joint bearing grinding process, although two grinding mechanisms set on the left and right can grind two journals at the same time, when grinding the other two journals, it is necessary to manually stop the machine, unload the material, flip the workpiece and reclamp it in order to complete the subsequent grinding. This manual intervention not only interrupts the continuity of production and leads to low production efficiency, but also increases the labor intensity and operational risks of the operators. Summary of the Invention

[0006] The purpose of this invention is to provide a universal joint grinding device to address the defects and shortcomings of the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a universal joint grinding device, comprising a base, a back plate disposed on the base, two fixed seats symmetrically disposed on the back plate, two movable blocks respectively disposed on the two fixed seats, two abutment rods respectively disposed on the two movable blocks for abutting the left and right ends of the universal joint, a rotating mechanism respectively disposed between the two abutment rods and the two movable blocks for driving the abutment rods to rotate when the two abutment rods abut the left and right ends of the universal joint, a moving mechanism respectively disposed between the two movable blocks and the two fixed seats for driving the two movable blocks to move closer or further apart, and a mechanism symmetrically disposed on the back plate for driving the moving mechanism. After the two moving blocks move away from each other, there are two lifting plates that support the journal of the universal joint; a lifting seat that is lifted between the two lifting plates to lift the universal joint from between the two lifting plates after it rises and to place the universal joint on the two lifting plates after it falls; a rotating mechanism that is set between the lifting seat and the base to drive the universal joint to rotate horizontally by 90 degrees after the lifting seat lifts the universal joint from the two lifting plates; a lifting mechanism that is set between the rotating mechanism and the base to drive the rotating mechanism to move the lifting seat up or down between the two lifting plates; and a grinding device that is symmetrically set on the back plate to grind the journal of the universal joint when the rotating mechanism drives the abutment rod to rotate.

[0008] A further improvement is that the abutment rod is equipped with an abutment plate, and the abutment plate is equipped with a tapered block for engaging with the tapered hole on the end face of the universal joint.

[0009] A further improvement is that the rotating mechanism includes a rotating hole on the moving block for the abutment rod to rotate on the moving block, a connecting bearing located in the rotating hole between the moving block and the abutment rod, and a rotating motor located between the moving block and the abutment rod for driving the abutment rod to rotate in the rotating hole when the two abutment rods abut against the left and right ends of the universal joint.

[0010] A further improvement is that the moving mechanism includes a telescopic mechanism disposed between the fixed base and the moving block for driving the moving block to move on the fixed base, and a guiding mechanism disposed between the moving block and the fixed base for guiding the moving direction of the moving block.

[0011] A further improvement is made to the guide mechanism, which includes a guide hole laterally opened on the fixed base, a guide block fixedly mounted on the movable block and fitted with the guide hole with a clearance, and the guide block being fixedly connected to the output end of the telescopic cylinder.

[0012] Further improvements include: the lifting mechanism includes a support seat mounted on the base, a lifting opening longitudinally opened on the support seat, a lifting rod mounted on the support seat and located within the lifting opening, a connecting plate fixedly mounted on the upper end face of the lifting rod, and a pushing mechanism located between the support seat and the lifting rod within the lifting opening for controlling the lifting rod to rise or fall within the lifting opening; the rotating mechanism includes a rotating device with its fixed end mounted on the connecting plate and its output end fixedly connected to the lower end of the lifting seat.

[0013] A further improvement is made to the back plate, which has a movable perforation. An auxiliary push rod is installed in the movable perforation on the back plate to push the universal joint to rotate between the two abutment rods when extended, so as to prevent the universal joint from being perpendicular to the lifting seat and to prevent it from affecting the normal rotation of the universal joint after retraction. A rotating gear is rotatably installed in the movable perforation on the back plate. The lower end of the auxiliary push rod is connected to the rotating gear and has a mating gear row for driving the auxiliary push rod to extend or retract when the rotating gear rotates in the opposite or forward direction. The telescopic device includes a linkage mechanism installed between the connecting plate and the rotating gear for driving the rotating gear to rotate in the opposite or forward direction when the connecting plate rises or falls.

[0014] Further effects: Since the universal joint bearing may be in a vertical position with the lifting seat after it stops rotating, if the lifting seat is directly controlled to rise, the universal joint bearing may stand upright on the lifting seat or fall off due to poor stability. Therefore, when the universal joint bearing stops rotating and the abutment plate abuts against the left and right ends of the universal joint, the position of the universal joint after it stops rotating can be finely adjusted by extending the auxiliary push rod to prevent its journal from being perpendicular to the direction of the locking column on the lifting seat, thereby ensuring that the lifting seat can stably support the universal joint every time it rises.

[0015] A further improvement is made to the linkage mechanism, which includes a connecting rod fixed at one end to the connecting plate and located in the middle of the movable through hole for following the connecting plate as it rises or falls in the movable through hole; a longitudinal connecting rod fixed at the other end of the connecting rod; a linkage toothed row located on the side end face of the longitudinal connecting rod and meshing with the mating toothed row; and an avoidance opening on the auxiliary push rod for the longitudinal connecting rod to pass through the auxiliary push rod to avoid the longitudinal connecting rod when the auxiliary push rod extends or retracts.

[0016] Further effects: When the lifting rod of the push mechanism rises or falls within the lifting opening, the connecting rod synchronously follows the connecting plate as it rises or falls within the movable through hole. This drives the longitudinal connecting rod to push the rotating gear to rotate in the opposite or forward direction, thereby driving the auxiliary push rod to extend or retract within the movable through hole. Furthermore, by setting up the avoidance opening, the auxiliary push rod can avoid the longitudinal connecting rod during its extension or retraction, ensuring that the longitudinal connecting rod maintains rotational control over the rotating gear and the extension and retraction of the auxiliary push rod during the lifting and lowering process.

[0017] A further improvement is that the grinding device includes a swing rod hinged to one end of the back plate, a grinding block fixedly mounted to the other end of the swing rod, a drive seat fixedly mounted on the back plate above the swing rod, and a swing mechanism with its fixed end mounted on the drive seat and its output end hingedly connected to the swing plate for controlling one end of the swing rod to swing downward or upward around the back plate when it is extended or retracted.

[0018] Further effects: When it is necessary to grind the rotating journal with the grinding block, the swing mechanism extends to control the swing rod to swing downward, so that the grinding block presses on the journal surface for grinding. When it is necessary to raise the lifting seat to lift the universal joint bearing, the swing mechanism retracts to control the swing rod to swing upward, so that the grinding block moves away from the journal surface.

[0019] A further improvement is that four locking columns are equidistantly arranged on the upper surface of the lifting platform.

[0020] Further effects: Since there are included angles between the four journals of the universal joint bearing, when the lifting seat lifts the universal joint bearing, the four locking columns can be locked in the four included angles, which can limit the lifting seat and prevent the universal joint bearing from sliding on the lifting seat when it rotates.

[0021] After adopting the above technical solution, the beneficial effects of the present invention are as follows: When grinding the journals of a universal joint bearing is required, the two journals to be ground are placed on two lifting plates respectively. Then, the moving mechanism drives the two moving blocks to move closer to each other until the two abutting rods abut against the left and right ends of the universal joint respectively. Then, the rotating mechanism drives the abutting rods to rotate, and the grinding device grinds the rotating universal joint journals. When the journal surfaces at the left and right ends of the universal joint are ground, the rotating mechanism stops driving the abutting rods to rotate, and the moving mechanism drives the two moving blocks to move away from each other, so that the universal joint rests on the two lifting plates. Then, the lifting mechanism drives the rotating mechanism to move the lifting seat between the two plates. The lifting plates rise until the lifting seat lifts the universal joint between the two lifting plates. Then, the rotating mechanism drives the universal joint to rotate 90 degrees, and the lifting mechanism drives the lifting seat to descend, so that the other two journals rest on the two lifting plates respectively. Then, the moving mechanism, rotating mechanism, and grinding device are controlled to grind the surfaces of the other two journals. In this way, the universal joint bearing can be rotated without manual stopping, unloading, flipping the workpiece and reclamping. The universal joint bearing can also be kept in the center position when the two moving blocks are close to each other. No manual intervention is required, the production continuity is not interrupted, the production efficiency is improved, and the labor intensity and operation risk of the operators are reduced. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the back plate, support plate, fixed base, rotating mechanism and grinding device in this invention;

[0025] Figure 3 This is a front sectional view of the fixed base and the moving mechanism in this invention;

[0026] Figure 4 This is a front sectional view of the lifting mechanism in this invention;

[0027] Figure 5 This is a rear-view perspective structural diagram of the present invention;

[0028] Figure 6 This is a side sectional view of the movable perforation in this invention;

[0029] Figure 7 This is a front view of the back plate, movable perforation, auxiliary push rod, guide protrusion, and guide groove in this invention;

[0030] Figure 8 This is a schematic diagram of the linkage mechanism in this invention;

[0031] Figure 9 This is a schematic diagram of the grinding device in this invention;

[0032] Figure 10 This is a schematic diagram of the auxiliary push rod and the gear rack in this invention.

[0033] Explanation of reference numerals in the attached drawings: 1. Base; 2. Back plate; 3. Fixed seat; 4. Moving block; 5. Abutting rod; 6. Lifting plate; 7. Lifting seat; 8. Abutting plate; 9. Conical block; 10. Rotating hole; 11. Connecting bearing; 12. Rotating motor; 13. Telescopic mechanism; 14. Guide hole; 15. Guide block; 16. Lifting opening; 17. Lifting rod; 18. Connecting plate; 19. Pushing mechanism; 20. Rotating device; 21. Movable through hole; 22. Auxiliary push rod; 23. Rotating gear; 24. Matching gear rack; 25. Connecting rod; 26. Longitudinal connecting rod; 27. Linkage gear rack; 28. Avoidance opening; 29. ​​Swinging rod; 30. Grinding block; 31. Drive seat; 32. Swinging mechanism; 33. Locking column; 34. Support seat; 35. Guide protrusion; 36. Guide groove. Detailed Implementation

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0035] See Figures 1 to 10 As shown, the technical solution adopted in this specific embodiment is: a universal joint grinding device, including a base 1, a back plate 2 disposed on the base 1, two fixed seats 3 symmetrically disposed on the back plate 2, two movable blocks 4 respectively disposed on the two fixed seats 3, two abutting rods 5 respectively disposed on the two movable blocks 4 for abutting the left and right ends of the universal joint, a rotating mechanism respectively disposed between the two abutting rods 5 and the two movable blocks 4 for driving the abutting rods 5 to rotate when the two abutting rods 5 abut the left and right ends of the universal joint, a moving mechanism respectively disposed between the two movable blocks 4 and the two fixed seats 3 for driving the two movable blocks 4 to move closer or further apart, and a rotating mechanism symmetrically disposed on the back plate 2 for driving the moving mechanism. After the two moving blocks 4 move away from each other, two lifting plates 6 lift the journal of the universal joint; a lifting seat 7 is set between the two lifting plates 6 to lift the universal joint from between the two lifting plates 6 after rising and to place the universal joint on the two lifting plates 6 after falling; a rotating mechanism is set between the lifting seat 7 and the base 1 to drive the universal joint to rotate horizontally by 90 degrees after the lifting seat 7 lifts the universal joint from the two lifting plates 6; a lifting mechanism is set between the rotating mechanism and the base 1 to drive the rotating mechanism to drive the lifting seat 7 to rise or fall between the two lifting plates 6; and a grinding device is set symmetrically on the back plate 2 to grind the journal of the universal joint when the rotating mechanism drives the abutment rod 5 to rotate.

[0036] The back plate 2 is vertically fixed to the base 1 by welding or integral molding. The two fixing seats 3 are vertically fixed to the back plate 2 by welding. The two lifting plates 6 are vertically fixed to the back plate 2 by welding, and a clearance space is formed between the two lifting plates 6 for the lifting seat 7 to rise and fall.

[0037] The abutment rod 5 is provided with an abutment plate 8, and the abutment plate 8 is provided with a tapered block 9 for engaging with the tapered hole on the end face of the universal joint. The diameter of the abutment plate 8 is greater than or equal to the diameter of the universal joint journal. The tapered block 9 is coaxially arranged with the abutment plate 8. In traditional universal joint bearings, a tapered hole is pre-machined on the end face of the universal joint journal during production. The tapered block 9 on the abutment plate 8 is clearance-fitted with the tapered hole. When the two moving blocks 4 drive the two abutment plates 8 to approach each other, the tapered block 9 gradually engages with the tapered hole. Since the tapered hole and the tapered block 9 are coaxially set with the universal joint journal and the abutment plate 8 respectively, when the two abutment plates 8 are fully close to abutting the left and right end faces of the universal joint, the journals at both ends of the universal joint will automatically be in a coaxial state with the abutment plate 8, and the journals will be slightly lifted a distance between the two lifting plates 6. This prevents the universal joint from being in an eccentric position when rotating, thus affecting the grinding state and preventing the universal joint from shaking when rotating.

[0038] The rotating mechanism includes a rotating hole 10 on the movable block 4 for the abutment rod 5 to rotate on the movable block 4, a connecting bearing 11 located within the rotating hole 10 between the movable block 4 and the abutment rod 5, and a rotating motor 12 located between the movable block 4 and the abutment rod 5 for driving the abutment rod 5 to rotate within the rotating hole 10 when the two abutment rods 5 abut against the left and right ends of the universal joint. The top of the rotating motor 12 is fixed to the upper end of one of the movable blocks 4 by bolts, and the output shaft is connected to one of the abutment rods 5 by a coupling. If two rotating motors 12 are provided, the two rotating motors 12 are respectively located between the two movable blocks 4 and the two abutment rods 5. Alternatively, the movable block 4 can be directly used as the rotating motor 12, and the abutment rod 5 can be directly connected to the rotating motor 12, eliminating the need for the connecting bearing 11. When two rotating motors 12 are provided, they are opened and closed synchronously by a linkage to ensure the synchronous rotation and speed of the abutment rod 5. The rotary motor 12 is either a servo motor or a DC motor. When the enable signal of the driver is cut off, the motor shaft loses its locking force and can be reversed, allowing the auxiliary push rod 22 to drive the universal joint bearing and rotate the abutment rod 5. The DC motor can also achieve high-speed rotation when powered on, with the speed adjustable via voltage or the driver. After the power is cut off, the motor shaft is in a free state and can be easily reversed by external force. The output end of the rotary motor 12 is fixedly connected to the abutment rod 5 via a coupling. The center lines of the main shafts of the two rotary motors 12 are on the same straight line. The two rotary motors 12 are connected to the same driver that integrates a dual-axis control algorithm. They can be directly connected, or a PLC can be used as the main controller to send commands to the two servo drivers via a bus (such as PROFINET) to achieve the synchronous opening, closing, and speed control requirements of the two abutment rods 5.

[0039] The moving mechanism includes a telescopic mechanism 13, disposed between the fixed base 3 and the moving block 4, for driving the moving block 4 to move on the fixed base 3, and a guiding mechanism, disposed between the moving block 4 and the fixed base 3, for guiding the moving direction of the moving block 4. The telescopic mechanism 13 is a telescopic cylinder, with its fixed end fixedly mounted on the fixed base 3 or the back plate 2, and its output end connected to the moving block 4. Two telescopic cylinders are provided, each connected to one of the two moving blocks 4. For synchronous control of the two telescopic cylinders, a solenoid valve can be used to simultaneously supply and exhaust air to both cylinders via a three-way connector, ensuring that their start and stop commands are simultaneous. One-way throttle valves are installed at the air inlet and exhaust port of each cylinder. After repeated adjustments, the opening of the throttle valves of the two cylinders is adjusted to make their extension and retraction speeds as consistent as possible. The technical solution of this application can be achieved as long as the extension and retraction of the two telescopic cylinders can be synchronously controlled, thereby creating a situation where the two moving blocks 4 move closer or further apart.

[0040] The guiding mechanism includes a guide hole 14 laterally opened on the fixed base 3 and a guide block 15 fixedly mounted on the movable block 4 and clearance-fitted with the guide hole 14. The guide block 15 is fixedly connected to the output end of the telescopic cylinder. The guide block 15 and the output end of the telescopic cylinder are connected and fixed by welding or bolts. When the telescopic cylinder extends or retracts, the movement of the guide block 15 in the guide hole 14 causes the movable block 4 to maintain linear motion on the fixed base 3.

[0041] The lifting mechanism includes a support base 34 mounted on the base 1, a lifting opening 16 longitudinally formed on the support base 34, a lifting rod 17 mounted on the support base 34 and located within the lifting opening 16, a connecting plate 18 fixedly mounted on the upper end face of the lifting rod 17, and a pushing mechanism 19 located between the support base 34 and the lifting rod 17 within the lifting opening 16 for controlling the lifting rod 17 to rise or fall within the lifting opening 16. The rotating mechanism includes a rotating device 20 with its fixed end mounted on the connecting plate 18 and its output end fixedly connected to the lower end of the lifting base 7. Figure 4 As shown, the pushing mechanism 19 can be an electric push rod or a telescopic cylinder, vertically installed in the lifting opening 16 of the support base 34. Its output end is fixedly connected to the lower end of the lifting rod 17. When extended, it drives the lifting rod 17 to rise within the lifting opening 16; when retracted, it drives the lifting rod 17 to fall. The support base 34 can be manufactured by separate assembly to facilitate the assembly between the control device and the lifting rod 17. The rotating device 20 is a servo motor, which uses controller coding to realize the rotation angle of the lifting base 7, fulfilling the rotation requirements of the universal joint bearing.

[0042] The back plate 2 has a movable through hole 21. An auxiliary push rod 22 is provided in the movable through hole 21 on the back plate 2 to push the universal joint to rotate between the two abutment rods 5 when extended, so as to prevent the universal joint from being perpendicular to the lifting seat 7, and to prevent affecting the normal rotation of the universal joint after retraction. A rotating gear 23 is rotatably provided in the movable through hole 21 on the back plate 2. The lower end of the auxiliary push rod 22 and meshing with the rotating gear 23 is connected to a mating gear row 24 for driving the auxiliary push rod 22 to extend or retract when the rotating gear 23 rotates in the opposite or forward direction. The telescopic device includes a linkage mechanism provided between the connecting plate 18 and the rotating gear 23 for driving the rotating gear 23 to rotate in the opposite or forward direction when the connecting plate 18 rises or falls.

[0043] Since the universal joint bearing may be in a vertical position on the lifting seat 7 after it stops rotating, if the lifting seat 7 is directly controlled to rise, the universal joint bearing may stand upright on the lifting seat 7 or fall off the lifting seat 7 due to poor stability. Therefore, when the universal joint bearing stops rotating and the abutment plate 8 abuts against the left and right ends of the universal joint, the position of the universal joint after it stops rotating can be finely adjusted by extending the auxiliary push rod 22 to prevent its journal from being perpendicular to the direction of the locking column 33 on the lifting seat 7, thereby ensuring that the lifting seat 7 can stably support the universal joint every time it rises.

[0044] The reverse rotation of gear 23 is counterclockwise, and the forward rotation is clockwise. For example... Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the auxiliary push rod 22 is located at the top in the movable through hole 21, with its lower part abutting against the mating tooth row 24. Both sides of the auxiliary push rod 22 are close to the movable through hole 21, thus limiting the movement of the auxiliary push rod 22 and reducing its tilt when extended or retracted. Figure 7 As shown, to further improve the movement stability of the auxiliary push rod 22, a guide protrusion 35 is provided on the side end of the auxiliary push rod 22, and a guide groove 36 is provided on the back plate 2. The guide groove 36 is connected to the movable through hole 21. The setting of the guide protrusion 35 and the guide groove 36 increases the limiting effect of the auxiliary push rod 22 and reduces the phenomenon of tilting of the auxiliary push rod 22. The movable through hole 21 is longitudinally opened on the back plate 2 and located in the middle of the back plate 2. The back plate 2 is processed in a split form. The rotating gear 23 forms a clearance fit with the inner ring of the rotating gear 23 through the fixed shaft set on the back plate 2, thereby realizing the rotation of the rotating gear 23. In the assembly type, one half of the back plate 2 structure is first connected to the rotating gear 23 and the auxiliary push rod 22, and then the other half of the back plate 2 structure is spliced, welded or glued to form an integral back plate 2 structure.

[0045] The linkage mechanism includes a connecting rod 25, one end of which is fixedly mounted on the connecting plate 18 and the middle part is located in the movable through hole 21 for following the connecting plate 18 as it rises or falls in the movable through hole 21; a longitudinal connecting rod 26 fixedly mounted on the other end of the connecting rod 25; a linkage toothed row 27 mounted on the side end face of the longitudinal connecting rod 26 and meshing with the mating toothed row 24; and a clearance opening 28 on the auxiliary push rod 22 for the longitudinal connecting rod 26 to pass through the auxiliary push rod 22 when the auxiliary push rod 22 is extended or retracted, so as to avoid the longitudinal connecting rod 26.

[0046] When the pushing mechanism 19 controls the lifting rod 17 to rise or fall within the lifting opening 16, the connecting rod 25 synchronously follows the connecting plate 18 to rise or fall within the movable through hole 21, thereby driving the longitudinal connecting rod 26 to drive the rotating gear 23 to rotate in the opposite or forward direction, so as to drive the auxiliary push rod 22 to push out or retract within the movable through hole 21. Furthermore, by setting the avoidance opening 28, the auxiliary push rod 22 can avoid the longitudinal connecting rod 26 during the pushing out or retracting process, so that the longitudinal connecting rod 26 maintains the rotation control of the rotating gear 23 and the pushing out and retracting of the auxiliary push rod 22 during the lifting process.

[0047] like Figure 8 As shown, the clearance opening 28 is opened along the length of the auxiliary push rod 22 and is located at the tail of the auxiliary push rod 22.

[0048] The polishing device includes a swing rod 29 with one end hinged to the back plate 2, a polishing block 30 fixedly mounted on the other end of the swing rod 29, a drive seat 31 fixedly mounted on the back plate 2 above the swing rod 29, and a swing mechanism 32 with its fixed end mounted on the drive seat 31 and its output end hingedly connected to the swing plate for controlling one end of the swing rod 29 to swing downward or upward around the back plate 2 when it is extended or retracted.

[0049] When the grinding block 30 needs to grind the rotating journal, the swing mechanism 32 extends to control the swing rod 29 to swing downward, so that the grinding block 30 presses on the journal surface for grinding. When the lifting seat 7 needs to be raised to lift the universal joint bearing, the swing mechanism 32 retracts to control the swing rod 29 to swing upward, so that the grinding block 30 moves away from the journal surface.

[0050] like Figure 9As shown, the swing mechanism 32 is a telescopic cylinder or an electric push rod. Its output end is hinged to the swing rod 29 via two hinge plates and a hinge shaft mounted on the swing rod 29. One end of the swing rod 29 is hinged via a hinge seat and a hinge shaft fixed on the back plate 2. The grinding block 30 is fixed to the other end of the swing rod 29 by adhesive bonding, or the swing rod 29 is molded and fixed to the grinding block 30 by injection molding, or the grinding block 30 is fixed to the other end of the swing rod 29 by bolt locking. The grinding block 30 can be an arc-shaped block or a square block, as long as it can fit against the journal to form a grinding surface.

[0051] Four locking columns 33 are equidistantly arranged on the upper end face of the lifting seat 7. Since there is an included angle between the four journals of the universal joint bearing, when the lifting seat 7 lifts the universal joint bearing, the four locking columns 33 can lock it in the four included angles, which can limit the lifting seat 7 and prevent the universal joint bearing from sliding on the lifting seat 7 when the lifting seat 7 rotates.

[0052] Four rectangular positioning columns 33 are fixedly and equidistantly mounted on the lifting base 7. The spacing between the four positioning columns 33 is set according to the distance between the four included angles of the universal joint bearing. The positioning columns 33 can be cylindrical or square.

[0053] All controller systems in this application can be connected to a control panel, and operators can control the movement of each cylinder, push rod, and motor by issuing commands to the control panel.

[0054] The working principle of this invention is as follows: When grinding the journals of a universal joint bearing is required, the two journals to be ground are manually placed on two lifting plates 6 respectively. Then, the telescopic mechanism 13 drives the two moving blocks 4 to move closer to each other. The guide hole 14 and the guide block 15 cooperate to keep the moving blocks 4 moving linearly on the fixed seat 3 until the two abutment plates 8 abut against the left and right ends of the universal joint respectively. As the conical blocks 9 on the abutment plates 8 gradually engage, the journals at the left and right ends of the universal joint are automatically aligned with the abutment plates 8, and the journals are slightly lifted a distance between the two lifting plates 6. Then, by rotating... The motor 12 drives the abutment rod 5 to rotate. The swing mechanism 32 extends to control one end of the swing rod 29 to swing downwards around the back plate 2, causing the grinding block 30 to press against the journal surface for grinding. After the journal surfaces at both ends of the universal joint are ground, the swing mechanism 32 retracts to control one end of the swing rod 29 to swing upwards around the back plate 2, causing the grinding block 30 to move away from the journal position of the universal joint. Then, the motor 12 stops driving the abutment rod 5 to rotate. At this time, the lifting mechanism 19 controls the lifting rod 17 to rise within the lifting opening 16, thereby causing the connecting plate 18 to rise via the connecting rod 25, thus pushing the rotating rod 17 to rise. The moving gear 23 rotates in the opposite direction, driving the auxiliary push rod 22 to extend out of the movable through hole 21, which can push the universal joint in the vertical position to rotate. Then, the telescopic mechanism 13 drives the two moving blocks 4 to move away from each other, so that the journals of the universal joint overlap with the two lifting plates 6. After the lifting seat 7, which rises with the connecting plate 18, lifts the universal joint a certain distance, the rotating device 20 drives the lifting seat 7 to rotate the universal joint ninety degrees, so that the other two unpolished journals are located below the polishing block 30. Then, the pushing mechanism 19 drives the lifting seat 7 to descend, so that the other two journals overlap with the two lifting plates 6 respectively. During the descent process... The longitudinal connecting rod 26 drives the rotating gear 23 to rotate in the forward direction, causing the auxiliary push rod 22 to gradually retract, preventing the auxiliary push rod 22 from affecting the rotation and grinding process of the universal joint. Then, the telescopic mechanism 13, the rotating motor 12, and the swing mechanism 32 are controlled to grind the other two journal surfaces. In this way, the grinding and rotation of the universal joint bearing can be achieved without manual stopping, unloading, flipping the workpiece and reclamping. Even when the two moving blocks 4 are close to each other, the universal joint bearing can be kept in the center position without manual intervention, without interrupting the continuity of production, improving production efficiency and reducing the labor intensity and operational risks of operators.

[0055] This invention protects the product's structure; the model numbers of the components are not protected by this invention and are common knowledge. Any component on the market that can achieve the functions described above can be used as a universal joint grinding device. Therefore, the model numbers and other parameters of the components are not described in detail in this invention. The contribution of this invention lies in the scientific combination of the various components.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions above are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents. Any aspects not detailed in the present invention are well-known to those skilled in the art.

Claims

1. A universal joint grinding device, characterized in that: The system includes a base, a back plate mounted on the base, two fixed seats symmetrically mounted on the back plate, two movable blocks mounted on the two fixed seats, two abutment rods mounted on the two movable blocks for abutting the left and right ends of the universal joint, a rotating mechanism positioned between the two abutment rods and the two movable blocks for rotating the abutment rods when they abut the left and right ends of the universal joint, a moving mechanism positioned between the two movable blocks and the two fixed seats for driving the two movable blocks closer to or further apart, and a mechanism symmetrically mounted on the back plate for adjusting the universal joint after the moving mechanism drives the two movable blocks further apart. Two lifting plates for lifting the journal; a lifting seat between the two lifting plates for lifting the universal joint from between the two lifting plates after it rises and for placing the universal joint on the two lifting plates after it falls; a rotating mechanism between the lifting seat and the base for driving the universal joint to rotate horizontally by 90 degrees after the lifting seat lifts the universal joint from the two lifting plates; a lifting mechanism between the rotating mechanism and the base for driving the rotating mechanism to drive the lifting seat to rise or fall between the two lifting plates; and a grinding device symmetrically arranged on the back plate for grinding the universal joint journal when the rotating mechanism drives the abutment rod to rotate. The lifting mechanism includes a support seat mounted on a base, a lifting opening longitudinally opened on the support seat, a lifting rod mounted on the support seat and located within the lifting opening, a connecting plate fixedly mounted on the upper end face of the lifting rod, and a pushing mechanism located between the support seat and the lifting rod within the lifting opening for controlling the lifting rod to rise or fall within the lifting opening. The rotating mechanism includes a rotating device with its fixed end mounted on the connecting plate and its output end fixedly connected to the lower end of the lifting seat. The back plate has a movable through hole, and an auxiliary push rod is set in the movable through hole on the back plate to push the universal joint to rotate between the two abutment rods when extended, so as to prevent the universal joint from being perpendicular to the lifting seat, and to prevent affecting the normal rotation of the universal joint after retraction. A rotating gear is rotatably set in the movable through hole on the back plate. The lower end of the auxiliary push rod is connected to the rotating gear and has a mating gear row for driving the auxiliary push rod to extend or retract when the rotating gear rotates in the opposite or forward direction. The telescopic device includes a linkage mechanism set between the connecting plate and the rotating gear for driving the rotating gear to rotate in the opposite or forward direction when the connecting plate rises or falls.

2. The universal joint grinding device according to claim 1, characterized in that: The abutment rod is provided with an abutment plate, and the abutment plate is provided with a tapered block for engaging with the tapered hole on the end face of the universal joint.

3. The universal joint grinding device according to claim 1, characterized in that: The rotating mechanism includes a rotating hole on the movable block for the abutting rod to rotate on the movable block, a connecting bearing located in the rotating hole between the movable block and the abutting rod, and a rotating motor located between the movable block and the abutting rod for driving the abutting rod to rotate in the rotating hole when the two abutting rods abut against the left and right ends of the universal joint.

4. The universal joint grinding device according to claim 1, characterized in that: The moving mechanism includes a telescopic mechanism disposed between the fixed base and the moving block for driving the moving block to move on the fixed base, and a guiding mechanism disposed between the moving block and the fixed base for guiding the moving direction of the moving block.

5. The universal joint grinding device according to claim 4, characterized in that: The guiding mechanism includes a guide hole laterally opened on the fixed base, a guide block fixedly mounted on the movable block and clearance-fitted with the guide hole, and the guide block is fixedly connected to the output end of the telescopic cylinder.

6. The universal joint grinding device according to claim 1, characterized in that: The linkage mechanism includes a connecting rod fixed at one end to the connecting plate and located in the middle of the movable through hole for following the connecting plate as it rises or falls in the movable through hole; a longitudinal connecting rod fixed at the other end of the connecting rod; a linkage toothed row located on the side end face of the longitudinal connecting rod and meshing with the mating toothed row; and a clearance opening on the auxiliary push rod for the longitudinal connecting rod to pass through the auxiliary push rod to avoid the longitudinal connecting rod when the auxiliary push rod extends or retracts.

7. The universal joint grinding device according to claim 1, characterized in that: The grinding device includes a swing rod hinged to a back plate at one end, a grinding block fixedly mounted at the other end of the swing rod, a drive seat fixedly mounted on the back plate above the swing rod, and a swing mechanism with its fixed end mounted on the drive seat and its output end hingedly connected to the swing plate for controlling one end of the swing rod to swing downward or upward around the back plate when it is extended or retracted.

8. A universal joint grinding device according to any one of claims 1 to 7, characterized in that: The upper surface of the lifting platform is provided with four locking columns at equal intervals.

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