A powder metallurgy gear grinding device and grinding process

Abstract

The present invention provides a powder metallurgy gear grinding device and a grinding process, and relates to the technical field of gear grinding. The powder metallurgy gear grinding device comprises: a workbench, a mobile mechanical arm, a grinding disc, a dust collecting box, a guide groove, and a second motor. The mobile mechanical arm is arranged on the top of the workbench, the second motor is fixedly mounted on the mobile mechanical arm, the grinding disc is rotatably mounted on the output shaft of the second motor, one side and the top of the workbench are provided with openings, the guide groove is fixedly mounted on the top inner wall of the workbench, and a fixed seat is fixedly mounted on the top of the workbench. The powder metallurgy gear grinding device provided by the present invention has the advantages of being easy to use, being able to place multiple gears at the exact center of the shaft and at the ideal grinding position at the same time, being convenient for the grinding device to grind multiple gears at the same time, being able to automatically complete the shifting operation after the gears are added, so that the gears can quickly and accurately reach the designated position for subsequent processing such as grinding.

Description

Technical Field

[0001] The invention relates to the technical field of gear grinding, and in particular to a powder metallurgy gear grinding device and a grinding process. Background Art

[0002] Powder metallurgy gears are made of metal powder (such as iron-based, copper-based, etc. powders) as the main raw materials. They are made with specific tooth shapes and sizes through a series of powder metallurgy processes such as mixing, pressing, and sintering. They are mechanical parts used to transmit power and motion. During the manufacturing process, the gear surface may have problems such as high roughness and tiny defects. Grinding can reduce the surface roughness of the gear, making the surface smoother, reducing friction loss during meshing, improving transmission efficiency, and reducing noise, making the gear transmission smoother and quieter.

[0003] Traditional powder metallurgy gear grinding equipment needs to clamp and grind gears one by one. The grinding time of a single gear is long, resulting in low overall production efficiency. Auxiliary operations such as clamping and tool changing are frequent. Frequent clamping, adjustment and monitoring require more manpower input, which increases labor costs and affects product quality due to factors such as manual fatigue.

[0004] Therefore, it is necessary to provide a powder metallurgy gear grinding device and a grinding process to solve the above technical problems. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a powder metallurgy gear grinding device which is easy to use, can place multiple gears at the exact center of the shaft and at the ideal grinding position at the same time, is convenient for the grinding device to grind multiple gears at the same time, can automatically complete the shifting operation after the gears are added, and can make the gears quickly and accurately reach the specified position for subsequent processing such as grinding.

[0006] To solve the above technical problems, the powder metallurgy gear grinding device provided by the present invention includes: a workbench, a moving robotic arm, a grinding disc, a dust collection box, a diversion groove, and a second motor. The moving robotic arm is arranged on the top of the workbench, the second motor is fixedly installed on the moving robotic arm, the grinding disc is rotatably installed on the output shaft of the second motor. Openings are provided on both the side and the top of the workbench, the diversion groove is fixedly installed on the inner wall of the top of the workbench, the dust collection box is arranged inside the workbench. A fixed seat is fixedly installed on the top of the workbench, a first motor is fixedly installed inside the fixed seat, a moving seat is slidably installed on the top of the workbench, a rotating disc is rotatably installed on one side of the fixed seat close to the moving seat, the output shaft of the first motor is fixedly connected to the rotating disc, a transmission shaft is fixedly installed on one side of the rotating disc, a gear cylinder is fixedly installed on the moving seat, a fixed shaft is arranged inside the gear cylinder, three connecting shafts are arranged at the ends of the fixed shaft and the transmission shaft close to each other. An annular insertion plate is arranged at one end of the connecting shaft close to the first motor, a clamping groove and two insertion slots are provided at the end of the connecting shaft far from the first motor, and the two insertion slots and the clamping groove are all communicated. Grinding gears to be ground are arranged on the outer sides of the three connecting shafts. Two movable rings are slidably installed inside the connecting shaft, the same second screw rod is rotatably installed on the two movable rings, two first moving blocks are threadedly connected to the outer side of the second screw rod. Four sliding grooves are provided on the outer wall of the connecting shaft, one end of a second connecting rod is hinged inside the sliding groove, the other end of the second connecting rod is hinged to a first connecting rod, and short rods are fixedly installed on both sides of the other end of the first connecting rod. The ends of the two short rods far from each other both extend into the connecting shaft and are respectively hinged to the corresponding first moving blocks. Both sides of the grinding gear to be ground are respectively in contact with the two second connecting rods.

[0007] Preferably, a plurality of guide rods are fixedly installed inside the connecting shaft, the movable ring is slidably installed on the guide rods, bearings are rotatably installed on the outer walls of the two second screw rods, the outer walls of the bearings are fixedly installed on the inner walls of the movable rings. Two sections of external threads are symmetrically provided on the outer wall of the second screw rod, and the rotation directions of the two sections of external threads are opposite.

[0008] Preferably, two springs are sleeved on the outer side of the guide rod, the two springs are respectively located on both sides of the movable ring, and the two ends of the spring are respectively fixedly connected to the connecting shaft and the movable ring.

[0009] Preferably, connection blocks are fixedly installed at both ends of the second screw rod, a rectangular groove is provided on the connection block close to one end of the transmission shaft, a fourth motor is fixedly installed inside the transmission shaft, rectangular protrusions are fixedly installed on the output shaft of the fourth motor and on the connection block close to one end of the gear cylinder, the rectangular protrusions are adapted to the rectangular groove, and magnets are fixedly installed on the rectangular protrusions.

[0010] Preferably, two guiding boxes are fixedly installed on the top of the workbench. A third screw rod and a linkage rod are rotatably installed in each of the two guiding boxes. A second moving plate is threadedly connected to the outer side of the third screw rod. A first moving plate is slidably installed on the outer side of the linkage rod. L-shaped support plates are fixedly installed on both the first moving plate and the second moving plate. A round shaft is rotatably installed on the L-shaped support plate. A single rack is integrally formed on the outer wall of the round shaft. The single rack meshes with the gear to be ground. Second linkage gears are fixedly installed at one ends of the two round shafts close to the fixed seat. A first linkage gear is fixedly installed on the outer wall of the transmission shaft. And both of the two second linkage gears mesh with the first linkage gear. Two second hydraulic cylinders are fixedly installed on one side of the workbench. The telescopic ends of the second hydraulic cylinders penetrate through the workbench and are fixedly connected to the corresponding first moving plates.

[0011] Preferably, a spiral chute is provided on the outer wall of the linkage rod. A convex block is fixedly installed in the second moving plate. The convex block slides in the spiral chute.

[0012] Preferably, the spiral direction of the spiral chute of the linkage rod is opposite to the outer thread of the third screw rod.

[0013] Preferably, a second sensor is fixedly installed on the inner wall of the gear cylinder. A cylinder cover is provided on one side of the gear cylinder away from the fixed seat. The fixed shaft is fixedly installed on the cylinder cover. A first screw rod is rotatably installed in the fixed shaft. A fifth motor is fixedly installed on one side of the cylinder cover. The output shaft of the fifth motor extends into the fixed shaft and is fixedly connected to one end of the first screw rod. A second moving block is threadedly connected to the outer side of the first screw rod. A top seat is provided on the outer wall of the fixed shaft. A guiding connecting plate is fixedly installed on the inner wall of the top seat. One end of the guiding connecting plate extends into the fixed shaft and is fixedly connected to the second moving block. Two telescopic plates are slidably installed in the gear cylinder. One end of the telescopic plate close to the fifth motor is fixedly connected to the cylinder cover. Two first hydraulic cylinders are fixedly installed on the top of the workbench. A lifting plate is provided on the top of the workbench. The telescopic ends of the two first hydraulic cylinders are both fixedly connected to the lifting plate. Three fourth screw rods are rotatably installed on the top of the lifting plate. Three third motors are also fixedly installed on the top of the lifting plate. The output shafts of the three third motors are respectively fixedly connected to one ends of the three fourth screw rods. L-shaped connecting plates are threadedly connected to the outer sides of the three fourth screw rods. One end of the L-shaped connecting plate extends below the lifting plate and is fixedly installed with a dialing plate. Three first sensors are fixedly installed on the top of the lifting plate.

[0014] Preferably, two fixing plates are fixedly installed on the top of the workbench, and the two first hydraulic cylinders are respectively fixedly installed on the tops of the two fixing plates.

[0015] A grinding process for powder metallurgy gears, which is ground by using the above-mentioned powder metallurgy gear grinding device, includes the following steps:

[0016] S1: Put three gears to be ground on three connecting shafts respectively and be in the middle position.

[0017] S2: Start the fourth motor to run, drive the second screw in the three connecting shafts to rotate forward, so that the first connecting rod and the second connecting rod in each sliding groove move towards the gears to be ground until the gears to be ground are clamped.

[0018] S3: Then start the second motor to run, drive the grinding disc to rotate and grind each gear to be ground in turn.

[0019] S4: After the grinding is completed, start the fourth motor to run, drive the second screw in the three connecting shafts to rotate reversely, and release the restriction on the gears to be ground.

[0020] S5: Move the moving seat backward, and then take the ground gear off the connecting shaft.

[0021] Compared with the related technology, the powder metallurgy gear grinding device provided by the present invention has the following beneficial effects:

[0022] The present invention provides a powder metallurgy gear grinding device and a grinding process. Through the cooperation of the connecting shaft, the transmission shaft, the annular insertion plate, the card slot and the slot, when problems such as wear and cracks occur in the connecting shaft, it can be quickly disassembled for repair or replacement. There is no need to spend a lot of time disassembling the whole device, only replace the damaged gear shaft, and there is no need to replace the whole complex component or device. Secondly, the gear shaft can be conveniently disassembled, comprehensively cleaned to remove the powder that may remain during the powder metallurgy process or the debris generated during the grinding process, and can be lubricated more evenly and effectively, reducing wear and improving the performance and service life of the gear shaft; Through the cooperation of the movable ring, the second screw, the bearing, the guide rod, the spring, the first connecting rod, the second connecting rod, the first moving block and the short rod, the first connecting rod and the second connecting rod can effectively limit the axial movement of the gear on the connecting shaft, avoid the gear from moving axially due to the axial force during operation. Secondly, it can also achieve convenient and fast installation and disassembly. When the gear needs to be replaced or repaired and maintained, the gear can be easily taken off or installed on the shaft, and when the position of the gear needs to be fine-tuned, the first connecting rod and the second connecting rod can be conveniently loosened and clamped again;

[0023] By cooperating with the third screw, the L-shaped support plate, the first linkage gear, the first moving plate, the second hydraulic cylinder, the round shaft, the linkage rod and the second linkage gear, it can be ensured that the gears with different centers are all located at the exact center of the shaft when installed on the connecting shaft, so that the coaxiality of the gear and the connecting shaft can reach a high precision, and the vibration, noise and wear during gear transmission caused by the coaxiality error can be reduced. In addition, the traditional method may require the alignment and installation of the gears one by one, while the device can quickly and accurately clamp multiple gears with different centers to the exact center of the shaft at the same time, greatly reducing the installation and adjustment time, and improving the working efficiency of the powder metallurgy gear grinding device. When the three gears are located at the exact center of the shaft and are in the ideal grinding position at the same time, it is convenient for the grinding device to grind multiple gears at the same time, giving full play to the processing capacity of the equipment;

[0024] Through the cooperation of the second sensor, the fifth motor, the second moving block, the top seat, the telescopic plate and the first screw, there is no need to manually place the gears, which saves a lot of manual operation time, and the operator does not need to frequently take and place the gears next to the grinding device, thereby reducing the contact with harmful factors such as dust and noise generated in the grinding process, improving the working environment and reducing occupational health risks; through the cooperation of the first hydraulic cylinder, the lifting plate, the fourth screw, the third motor, the L-shaped connecting plate and the first sensor, the shifting operation can be automatically completed after the gear is added, so that the gear can quickly and accurately reach the designated position for subsequent processing such as grinding without manual intervention, freeing the operator from the dangerous area of ​​direct contact with the equipment, reducing the safety risks such as mechanical injuries that may be suffered by personnel during the process of adding and shifting the gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a first embodiment of a powder metallurgy gear grinding device provided by the present invention;

[0026] Figure 2 for Figure 1 A schematic cross-sectional view of a portion of the structure shown;

[0027] Figure 3 for Figure 2 A schematic diagram of a portion of the structure shown;

[0028] Figure 4 for Figure 3 A schematic cross-sectional view of the fixing seat shown;

[0029] Figure 5 for Figure 4 An enlarged schematic diagram of the structure of section A is shown;

[0030] Figure 6 for Figure 3 A schematic diagram of a portion of the structure shown;

[0031] Figure 7 Schematic diagram showing the cooperation of multiple connecting shafts and multiple gears to be ground Figure 3 as shown;

[0032] Figure 8 Schematic diagram showing the cooperation of a single connecting shaft and a single gear to be ground Figure 7 as shown;

[0033] Figure 9 Schematic diagram of the structural cross-section Figure 8 as shown;

[0034] Figure 10 Schematic diagram of the enlarged structure of part B Figure 9 as shown;

[0035] Figure 11 Schematic diagram of the side cross-sectional plane of the structure Figure 9 as shown;

[0036] Figure 12 Schematic diagram showing the cooperation of the annular insertion plate with the card slot and the slot Figure 8 as shown;

[0037] Figure 13 Schematic diagram of the side cross-sectional plane of the structure Figure 12 as shown;

[0038] Figure 14 Schematic diagram of the second embodiment of the powder metallurgy gear grinding device provided by the present invention

[0039] Figure 15 Schematic diagram of a partial structure Figure 14 as shown;

[0040] Figure 16 Schematic diagram of the partial structural cross-section Figure 15 as shown;

[0041] Figure 17 Schematic diagram showing the cooperation of the second moving plate and the linkage rod Figure 16 as shown;

[0042] Figure 18 Schematic diagram of the third embodiment of the powder metallurgy gear grinding device provided by the present invention

[0043] Figure 19 Schematic diagram of the structural cross-section of the fixed shaft, telescopic plate, gear cylinder, cylinder cover, etc. Figure 18 as shown;

[0044] Figure 20 Schematic diagram after the cylinder cover is opened from the gear cylinder Figure 19 as shown;

[0045] Figure 21 Schematic diagram Figure 18Schematic diagram of the cooperation of the first hydraulic cylinder, the third motor, the fourth screw rod and the L-shaped connecting plate shown;

[0046] Figure 22 For Figure 21 Schematic top view of the structure shown.

[0047] Reference numerals in the figure: 1, workbench; 2, fixed seat; 3, first motor; 4, mobile robotic arm; 5, grinding disc; 6, gear cylinder; 7, moving seat; 8, cylinder cover; 9, first hydraulic cylinder; 10, dust collection box; 11, diversion groove; 12, second motor; 13, gear to be ground; 14, connecting shaft; 15, fixed shaft; 16, rotating disc; 17, third motor; 18, transmission shaft; 19, fourth motor; 20, magnet; 21, short rod; 22, first sensor; 23, annular plug board; 24, first connecting rod; 25, second connecting rod; 26, first screw rod; 27, card slot; 28, slot; 29, guide rod; 30, spring; 31, movable ring; 32, second screw rod; 33, first moving block; 34, second sensor; 35, bearing; 36, guide box; 37, third screw rod; 38, second hydraulic cylinder; 39, first moving plate; 40, second moving plate; 41, linkage rod; 42, first linkage gear; 43, round shaft; 44, L-shaped support plate; 45, telescopic plate; 46, second linkage gear; 47, convex block; 48, fixed plate; 49, lifting plate; 50, fourth screw rod; 51, L-shaped connecting plate; 52, dialing plate; 53, fifth motor; 54, second moving block; 55, top seat. Specific embodiments

[0048] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0049] First embodiment:

[0050] Please refer to Figures 1 - 13, in the first embodiment of the present invention, the powder metallurgy gear grinding device includes: a workbench 1, a moving robotic arm 4, a grinding disc 5, a dust collection box 10, a diversion groove 11, and a second motor 12. The moving robotic arm 4 is arranged on the top of the workbench 1, the second motor 12 is fixedly installed on the moving robotic arm 4, the grinding disc 5 is rotatably installed on the output shaft of the second motor 12. Openings are provided on one side and the top of the workbench 1. The diversion groove 11 is fixedly installed on the inner wall of the top of the workbench 1. The dust collection box 10 is arranged inside the workbench 1. A fixed seat 2 is fixedly installed on the top of the workbench 1. A first motor 3 is fixedly installed inside the fixed seat 2. A moving seat 7 is slidably installed on the top of the workbench 1. A locking structure is provided on one side of the moving seat 7, and it can be locked when moving to a specified position to prevent movement during gear grinding. A rotating disc 16 is rotatably installed on one side of the fixed seat 2 close to the moving seat 7. The output shaft of the first motor 3 is fixedly connected to the rotating disc 16. A transmission shaft 18 is fixedly installed on one side of the rotating disc 16. A gear cylinder 6 is fixedly installed on the moving seat 7. A fixed shaft 15 is arranged inside the gear cylinder 6. Three connecting shafts 14 are provided at the ends of the fixed shaft 15 and the transmission shaft 18 close to each other. When the three connecting shafts 14 rotate by a certain angle, the blocks on the annular insertion plate 23 are rotated to the slots 28, ensuring that the annular insertion plate 23 can be inserted into the connecting shaft 14. And when problems such as wear and cracks occur in the connecting shaft 14, it can be quickly disassembled for repair or replacement without spending a lot of time disassembling the entire device, only replacing the damaged gear shaft, without having to replace the entire complex component or device. An annular insertion plate 23 is provided at the end of the connecting shaft 14 close to the first motor 3. A card slot 27 and two slots 28 are provided at the end of the connecting shaft 14 far from the first motor 3. The two slots 28 and the card slot 27 are all communicated. Three grinding gears 13 are arranged on the outer sides of the three connecting shafts 14. Two movable rings 31 are slidably installed inside the connecting shaft 14. The same second screw rod 32 is rotatably installed on the two movable rings 31. Two first moving blocks 33 are threadedly connected to the outer side of the second screw rod 32. Four sliding grooves are provided on the outer wall of the connecting shaft 14. One end of a second connecting rod 25 is hinged inside the sliding groove. The other end of the second connecting rod 25 is hinged to a first connecting rod 24. On both sides of the other end of the first connecting rod 24, short rods 21 are fixedly installed. The ends of the two short rods 21 away from each other both extend into the connecting shaft 14 and are respectively hinged to the corresponding first moving blocks 33. The two sides of the grinding gear 13 are respectively in contact with the two second connecting rods 25.

[0051] A plurality of guide rods 29 are fixedly installed inside the connecting shaft 14. The movable ring 31 is slidably installed on the guide rods 29. Bearings 35 are rotatably installed on the outer walls of both of the second screw rods 32. The outer walls of the bearings 35 are fixedly installed on the inner wall of the movable ring 31. Two sections of external threads are symmetrically provided on the outer wall of the second screw rod 32, and the helix directions of the two sections of external threads are opposite.

[0052] Two springs 30 are sleeved outside the guide rods 29. The two springs 30 are respectively located on both sides of the movable ring 31. The two ends of the springs 30 are respectively fixedly connected to the connecting shaft 14 and the movable ring 31.

[0053] Connection blocks are fixedly installed at both ends of the second screw rod 32. A rectangular groove is provided on the connection block near one end of the transmission shaft 18. A fourth motor 19 is fixedly installed inside the transmission shaft 18. Rectangular protrusions are fixedly installed on the output shaft of the fourth motor 19 and on the connection block near one end of the gear cylinder 6. The rectangular protrusions are adapted to the rectangular grooves, and magnets 20 are fixedly installed on the rectangular protrusions. When the rectangular protrusions cannot be inserted into the rectangular grooves, one end of the second screw rod 32 inside the other two connecting shafts 14 will be pushed out of the connecting shaft 14. Then the fourth motor 19 is started. When the output shaft of the fourth motor 19 rotates, the rectangular protrusion on the output shaft will be inserted into the rectangular groove on the second screw rod 32, and the second screw rod 32 can be firmly adsorbed through the magnet 20.

[0054] The working principle of the powder metallurgy gear grinding device provided by the present invention is as follows:

[0055] First, rotate the three connecting shafts 14 by a certain angle so that the clamping blocks on the annular insertion plate 23 rotate to the slots 28 to ensure that the annular insertion plate 23 can be separated from the connecting shafts 14. Then move the moving seat 7 in a direction away from the fixed seat 2, put the three gears to be ground 13 on the three connecting shafts 14 respectively, and then push the moving seat 7 so that the fixed shaft 15 abuts against the three connecting shafts 14. Start the fourth motor 19. The fourth motor 19 drives the second screw rod 32 to rotate through the output shaft, so that the two first moving blocks 33 move towards each other, and the gears to be ground 13 are clamped through the first connecting rod 24 and the second connecting rod 25. Then start the second motor 12. The output shaft of the second motor 12 drives the grinding disc 5 to rotate to grind the gears to be ground 13. When it is necessary to adjust the angle of the gears to be ground 13, start the first motor 3. The output shaft of the first motor 3 drives the rotating disc 16 to rotate, and the connecting shafts 14 are driven to rotate through the transmission shaft 18 to achieve the adjustment.

[0056] When one of the three connecting shafts 14 is damaged, rotate the connecting shaft 14 by a certain angle to turn the clamping block on the annular insertion plate 23 to the slot 28 to separate them, and then replace it. Insert the annular insertion plate 23 at one end of the undamaged connecting shaft 14 into the slot 28 and the clamping groove 27. At this time, connecting blocks are fixedly installed at the mutually remote ends of the two second screws 32, and rectangular grooves and rectangular protrusions are provided on the connecting blocks. When the rectangular protrusion cannot be inserted into the rectangular groove, one end of the second screw 32 in the other two connecting shafts 14 will be pushed out of the connecting shaft 14. Start the fourth motor 19. When the output shaft of the fourth motor 19 rotates, the rectangular protrusion on the output shaft will be inserted into the rectangular groove on the second screw 32, and the second screw 32 can be firmly adsorbed by the magnet 20. When the output shaft drives the second screw 32 to rotate slowly, multiple rectangular protrusions will be inserted into the rectangular grooves, so that the second screw 32 returns to its original position, and thus the replacement of the damaged connecting shaft 14 is completed.

[0057] Compared with the related art, the powder metallurgy gear grinding device provided by the present invention has the following beneficial effects:

[0058] The present invention provides a powder metallurgy gear grinding device. Through the cooperation of the connecting shaft 14, the transmission shaft 18, the annular insertion plate 23, the clamping groove 27 and the slot 28, when problems such as wear and cracks occur in the connecting shaft 14, it can be quickly disassembled for repair or replacement without spending a lot of time disassembling the whole device. Only the damaged gear shaft needs to be replaced, and there is no need to replace the whole complex component or device. Secondly, the gear shaft can be conveniently disassembled for thorough cleaning to remove the powder that may remain during the powder metallurgy process or the debris generated during the grinding process, and can also be lubricated more evenly and effectively to reduce wear and improve the performance and service life of the gear shaft; through the cooperation of the movable ring 31, the second screw 32, the bearing 35, the guide rod 29, the spring 30, the first connecting rod 24, the second connecting rod 25, the first moving block 33 and the short rod 21, the first connecting rod 24 and the second connecting rod 25 can effectively limit the axial movement of the gear on the connecting shaft 14 to avoid the gear from moving axially due to the axial force during operation. Secondly, it can also achieve convenient and fast installation and disassembly. When it is necessary to replace the gear or perform maintenance and repair on the gear, the gear can be easily removed from or installed on the shaft, and when it is necessary to finely adjust the position of the gear, the first connecting rod 24 and the second connecting rod 25 can be easily loosened and clamped again.

[0059] Second Embodiment:

[0060] Based on the powder metallurgy gear grinding device provided in the first embodiment of the present application, the second embodiment of the present application proposes another powder metallurgy gear grinding device. The second embodiment is only a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0061] The second embodiment of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0062] Please refer to Figures 14 - 17 , the powder metallurgy gear grinding device further includes two guiding boxes 36 fixedly installed on the top of the workbench 1. A third screw 37 and a linkage rod 41 are rotatably installed in each of the two guiding boxes 36. A second moving plate 40 is threadedly connected to the outer side of the third screw 37. A first moving plate 39 is slidably installed on the outer side of the linkage rod 41. L-shaped support plates 44 are fixedly installed on both the first moving plate 39 and the second moving plate 40. A round shaft 43 is rotatably installed on the L-shaped support plate 44. While the two round shafts 43 move relative to each other, the three gears to be ground 13 can be clamped to the center of the shaft, so as to facilitate the grinding disc 5 to grind the three gears to be ground 13 simultaneously. A single rack is integrally formed on the outer wall of the round shaft 43, and the single rack meshes with the gear to be ground 13. Second linkage gears 46 are fixedly installed at one ends of the two round shafts 43 close to the fixed seat 2. A first linkage gear 42 is fixedly installed on the outer wall of the transmission shaft 18, and the two second linkage gears 46 are both meshed with the first linkage gear 42. Two second hydraulic cylinders 38 are fixedly installed on one side of the workbench 1. The telescopic ends of the second hydraulic cylinders 38 penetrate through the workbench 1 and are fixedly connected to the corresponding first moving plates 39.

[0063] A spiral chute is provided on the outer wall of the linkage rod 41, and a convex block 47 is fixedly installed in the second moving plate 40. The convex block 47 slides in the spiral chute.

[0064] The spiral direction of the spiral chute of the linkage rod 41 is opposite to the external thread of the third screw 37. By such a setting, it can be realized that while the two round shafts 43 move relative to each other, the three gears to be ground 13 are clamped to the center of the shaft.

[0065] When grinding gears, the center points of some gears will change. At this time, the second hydraulic cylinder 38 is started. The second hydraulic cylinder 38 drives the first moving plate 39 to move through its telescopic end. By the cooperation of the bump 47 and the spiral chute on the linkage rod 41, the linkage rod 41 and the third screw rod 37 can be driven to rotate simultaneously, so that the first moving plate 39 and the second moving plate 40 move relative to each other. When moving a certain distance, the two second linkage gears 46 are engaged with the first linkage gear 42, and the two round shafts 43 are engaged with the gear grooves of the three gears to be ground 13. While the two round shafts 43 move relative to each other, the three gears to be ground 13 can be clamped to the exact center of the shaft, so as to facilitate the grinding disc 5 to grind the three gears to be ground 13 simultaneously. Through the setting of the above components, the present invention can ensure that gears with different centers are all at the exact center position of the shaft when installed on the connecting shaft 14, so that the coaxiality between the gear and the connecting shaft 14 reaches a high precision, reducing the vibration, noise and wear during gear transmission caused by coaxiality error. And in the traditional way, it may be necessary to align and install the gears one by one, while this device can quickly and accurately clamp multiple gears with different centers to the exact center of the shaft at the same time, greatly reducing the installation and adjustment time and improving the working efficiency of the powder metallurgy gear grinding device. When the three gears are at the exact center of the shaft and at the ideal grinding position at the same time, it is convenient for the grinding device to grind multiple gears simultaneously, giving full play to the processing capacity of the equipment.

[0066] Third Embodiment:

[0067] Based on the powder metallurgy gear grinding device provided in the second embodiment of the present application, the third embodiment of the present application proposes another powder metallurgy gear grinding device. The third embodiment is only a preferred way of the second embodiment, and the implementation of the third embodiment will not affect the independent implementation of the second embodiment.

[0068] The following further describes the third embodiment of the present invention in conjunction with the drawings and embodiments.

[0069] Please refer to Figures 18 - 22, the powder metallurgy gear grinding device further includes a second sensor 34 fixedly installed on the inner wall of the gear cylinder 6. A cylinder cover 8 is provided on one side of the gear cylinder 6 away from the fixed seat 2. Both the cylinder cover 8 and the outer wall of the gear cylinder 6 are provided with second locking structures. When a plurality of gears 13 to be ground are sleeved on the fixed shaft 15, the cylinder cover 8 and the gear cylinder 6 can be locked to each other through the second locking structure. The fixed shaft 15 is fixedly installed on the cylinder cover 8. A first screw rod 26 is rotatably installed in the fixed shaft 15. A fifth motor 53 is fixedly installed on one side of the cylinder cover 8. The output shaft of the fifth motor 53 extends into the fixed shaft 15 and is fixedly connected to one end of the first screw rod 26. A second moving block 54 is threadedly connected to the outside of the first screw rod 26. A top seat 55 is provided on the outer wall of the fixed shaft 15. A guiding connecting plate is fixedly installed on the inner wall of the top seat 55. One end of the guiding connecting plate extends into the fixed shaft 15 and is fixedly connected to the second moving block 54. Two telescopic plates 45 are slidably installed in the gear cylinder 6. The telescopic plate 45 includes an outer layer fixed plate which is hollow, and an inner layer sliding plate is provided inside. Its size is slightly smaller than the internal space of the outer layer fixed plate, which is convenient for freely sliding therein and extending out of the outer side fixed plate. One end of the telescopic plate 45 close to the fifth motor 53 is fixedly connected to the cylinder cover 8. Two first hydraulic cylinders 9 are fixedly installed on the top of the workbench 1. A lifting plate 49 is provided on the top of the workbench 1. The telescopic ends of the two first hydraulic cylinders 9 are both fixedly connected to the lifting plate 49. Three fourth screw rods 50 are rotatably installed on the top of the lifting plate 49. Three third motors 17 are also fixedly installed on the top of the lifting plate 49. The output shafts of the three third motors 17 are respectively fixedly connected to one end of the three fourth screw rods 50. L-shaped connecting plates 51 are threadedly connected to the outside of the three fourth screw rods 50. One end of the L-shaped connecting plate 51 extends below the lifting plate 49 and is fixedly installed with a dialing plate 52. Three first sensors 22 are fixedly installed on the top of the lifting plate 49. In this way, there is no need for manual placement of gears, saving a large amount of manual operation time, and the operator does not need to frequently pick up and place gears beside the grinding device, reducing the contact with harmful factors such as dust and noise generated during the grinding process.

[0070] Two fixing plates 48 are fixedly installed on the top of the workbench 1, and the two first hydraulic cylinders 9 are respectively fixedly installed on the tops of the two fixing plates 48.

[0071] When the gears on the three connecting shafts 14 are ground and removed, the fifth motor 53 is started, and the output shaft of the fifth motor 53 drives the first screw 26 to rotate. When the first screw 26 rotates, it drives the second moving block 54 to move, and pushes out the gear 13 to be ground through the top seat 55. When the second sensor 34 detects that the three gears 13 to be ground are pushed out, the fifth motor 53 is turned off, and then the two first hydraulic cylinders 9 are started. The two first hydraulic cylinders 9 drive the lifting plate 49 to descend through the telescopic ends, and the three third motors 17 are started. The three third motors 17 respectively drive the three fourth screws 50 to rotate through the output shafts, so that the three L-shaped connecting plates 51 move and the three gears to be ground 13 are moved. When they are moved to a certain distance, the three L-shaped connecting plates 51 are respectively in contact with the three first sensors 22, and the third motors 17 are started. The machine 17 is turned off and the three gears to be ground 13 are no longer moved. At this time, the first hydraulic cylinder 9 drives the lifting plate 49 to rise, thereby completing the addition of the gears and moving the gears to the corresponding positions. The present invention, through the arrangement of the above-mentioned components, does not require manual placement of gears, thus saving a large amount of manual operation time, and the operator does not need to frequently perform operations such as taking and placing gears near the grinding device, thereby reducing contact with harmful factors such as dust and noise generated during the grinding process, improving the working environment, reducing occupational health risks, and automatically completing the moving operation after the gears are added, so that the gears can quickly and accurately reach the designated position for subsequent processing such as grinding, without the need for manual intervention, freeing the operator from the dangerous area of ​​direct contact with the equipment, reducing the safety risks such as mechanical injuries that may be suffered by personnel during the process of adding and moving gears.

[0072] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A powder metallurgy gear grinding device, comprising a workbench, a mobile mechanical arm, a grinding disc, a dust collecting box, a guide groove and a second motor, wherein the mobile mechanical arm is arranged on the top of the workbench, the second motor is fixedly mounted on the mobile mechanical arm, the grinding disc is rotatably mounted on the output shaft of the second motor, one side and the top of the workbench are both provided with openings, the guide groove is fixedly mounted on the top inner wall of the workbench, and the dust collecting box is arranged inside the workbench, characterized in that: A fixed seat is fixedly installed on the top of the workbench, a first motor is fixedly installed in the fixed seat, a moving seat is slidably installed on the top of the workbench, a rotating disk is rotatably installed on the fixed seat close to the moving seat, an output shaft of the first motor is fixedly connected to the rotating disk, a transmission shaft is fixedly installed on one side of the rotating disk, a gear cylinder is fixedly installed on the moving seat, a fixed shaft is arranged in the gear cylinder, three connecting shafts are arranged at the ends of the fixed shaft and the transmission shaft close to each other, an annular plug plate is arranged at the end of the connecting shaft close to the first motor, a card slot and two slots are arranged at the end of the connecting shaft away from the first motor, and the two slots The gears to be ground are arranged on the outer sides of the three connecting shafts, two movable rings are slidably installed in the connecting shaft, and the same second screw is rotatably installed on the two movable rings, and the outer sides of the second screw are threadedly connected to two first moving blocks, and the outer wall of the connecting shaft is provided with four sliding grooves, one end of the second connecting rod is hinged in the sliding groove, and the other end of the second connecting rod is hinged to the first connecting rod, and short rods are fixedly installed on both sides of the other end of the first connecting rod, and the ends of the two short rods away from each other extend into the connecting shaft and are hinged to the corresponding first moving blocks, and the two sides of the gear to be ground are respectively in contact with the two second connecting rods.

2. The powder metallurgy gear grinding device according to claim 1, characterized in that: A plurality of guide rods are fixedly installed in the connecting shaft, the movable ring is slidably installed on the guide rods, the outer walls of the two second screws are rotatably installed with bearings, the outer walls of the bearings are fixedly installed on the inner wall of the movable ring, and the outer wall of the second screw is symmetrically provided with two sections of external threads, and the rotation directions of the two sections of external threads are opposite.

3. The powder metallurgy gear grinding device according to claim 2, characterized in that: Two springs are sleeved on the outer side of the guide rod. The two springs are respectively located on both sides of the movable ring. The two ends of the springs are respectively fixedly connected to the connecting shaft and the movable ring.

4. The powder metallurgy gear grinding device according to claim 1, characterized in that: Connecting blocks are fixedly installed at both ends of the second screw rod, a rectangular groove is provided on the connecting block close to one end of the transmission shaft, a fourth motor is fixedly installed in the transmission shaft, and rectangular protrusions are fixedly installed on the output shaft of the fourth motor and on the connecting block close to one end of the gear cylinder, the rectangular protrusions are adapted to the rectangular grooves, and a magnet is fixedly installed on the rectangular protrusions.

5. The powder metallurgy gear grinding device according to claim 1, characterized in that: Two guide boxes are fixedly installed on the top of the workbench, and a third screw and a connecting rod are rotatably installed in the two guide boxes. The outer side of the third screw is threadedly connected to the second moving plate, and the first moving plate is slidably installed on the outer side of the connecting rod. The first moving plate and the second moving plate are fixedly installed with L-shaped support plates, and a circular shaft is rotatably installed on the L-shaped support plate, and a single rack is integrally formed on the outer wall of the circular shaft, and the single rack is meshed with the gear to be ground. The second linkage gear is fixedly installed on one end of the two circular shafts close to the fixed seat, and the first linkage gear is fixedly installed on the outer wall of the transmission shaft, and the two second linkage gears are meshed with the first linkage gear. Two second hydraulic cylinders are fixedly installed on one side of the workbench, and the telescopic end of the second hydraulic cylinder passes through the workbench and is fixedly connected to the corresponding first moving plate.

6. The powder metallurgy gear grinding device according to claim 5, characterized in that: The outer wall of the linkage rod is provided with a spiral groove, and a protrusion is fixedly installed in the second movable plate, and the protrusion slides in the spiral groove.

7. The powder metallurgy gear grinding device according to claim 6, characterized in that: The spiral groove of the connecting rod and the external thread of the third screw rod have opposite rotation directions.

8. The powder metallurgy gear grinding device according to claim 1, characterized in that: A second sensor is fixedly installed on the inner wall of the gear cylinder, a cylinder cover is provided on the side of the gear cylinder away from the fixed seat, the fixed shaft is fixedly installed on the cylinder cover, a first screw is rotatably installed in the fixed shaft, a fifth motor is fixedly installed on one side of the cylinder cover, an output shaft of the fifth motor extends into the fixed shaft and is fixedly connected to one end of the first screw, a second moving block is threadedly connected to the outer side of the first screw, a top seat is provided on the outer wall of the fixed shaft, a guide connecting plate is fixedly installed on the inner wall of the top seat, one end of the guide connecting plate extends into the fixed shaft and is fixedly connected to the second moving block, two telescopic plates are slidably installed in the gear cylinder, and the telescopic plates are connected to the fixed shaft. One end of the retractable plate close to the fifth motor is fixedly connected to the cylinder cover, two first hydraulic cylinders are fixedly installed on the top of the workbench, and a lifting plate is provided on the top of the workbench, and the telescopic ends of the two first hydraulic cylinders are fixedly connected to the lifting plate, and three fourth screws are rotatably installed on the top of the lifting plate. Three third motors are also fixedly installed on the top of the lifting plate, and the output shafts of the three third motors are respectively fixedly connected to one end of the three fourth screws, and the outer sides of the three fourth screws are threadedly connected with an L-shaped connecting plate, one end of the L-shaped connecting plate extends to the bottom of the lifting plate and is fixedly installed with a paddle plate, and three first sensors are fixedly installed on the top of the lifting plate.

9. The powder metallurgy gear grinding device according to claim 8, characterized in that: Two fixing plates are fixedly installed on the top of the workbench, and the two first hydraulic cylinders are fixedly installed on the top of the two fixing plates respectively.

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