Powder metallurgy gear grinding device and grinding process

Abstract

The invention provides a powder metallurgy gear grinding device and a powder metallurgy gear grinding process, and relates to the technical field of gear grinding. The powder metallurgy gear grinding device comprises a workbench, a movable mechanical arm, a grinding disc, a dust collection box, a flow guide groove and a second motor, the movable mechanical arm is arranged at the top of the workbench, the second motor is fixedly installed on the movable mechanical arm, and the grinding disc is rotatably installed on an output shaft of the second motor. Openings are formed in one side and the top of the workbench, the flow guide groove is fixedly installed on the inner wall of the top of the workbench, and a fixing base is fixedly installed on the top of the workbench. The powder metallurgy gear grinding device has the beneficial effects that using is convenient, a plurality of gears can be located in the dead center of the shaft and located at the ideal grinding position at the same time, the grinding device can conveniently conduct grinding machining on the multiple gears at the same time, stirring operation can be automatically completed after the gears are added, and the grinding efficiency is improved. And the gear can quickly and accurately reach a designated position for subsequent machining 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] In order to solve the above technical problems, the powder metallurgy gear grinding device provided by the present invention 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 installed on the mobile mechanical arm, the grinding disc is rotatably installed 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 installed on the top inner wall of the workbench, the dust collecting box is arranged in the workbench, a fixed seat is fixedly installed on the top of the workbench, a first motor is fixedly installed in the fixed seat, a mobile 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 mobile 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 mobile seat, a fixed shaft is provided in the gear cylinder, and the fixed shaft and the The transmission shaft is provided with three connecting shafts at one end close to each other, and an annular plug plate is provided at one end of the connecting shaft close to the first motor, and a card slot and two slots are provided at one end of the connecting shaft away from the first motor, and the two slots and the card slot are communicated with each other, and gears to be ground are provided on the outer sides of the three connecting shafts, and 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 side of the second screw is threadedly connected to two first moving blocks, and four sliding grooves are provided on the outer wall of the connecting shaft, and 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 both sides of the gears to be ground are in contact with the corresponding gears to be ground.

[0007] Preferably, 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.

[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 springs are respectively fixedly connected to the connecting shaft and the movable ring.

[0009] Preferably, connecting blocks are fixedly installed at both ends of the second screw, 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.

[0010] Preferably, 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 movable plate, and the outer side of the connecting rod is slidably installed with the first movable plate, the first movable plate and the second movable plate are fixedly installed with an L-shaped support plate, 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, and 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, and 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 movable plate.

[0011] Preferably, a spiral groove is provided on the outer wall of the linkage rod, and a protrusion is fixedly installed in the second movable plate, and the protrusion slides in the spiral groove.

[0012] Preferably, the spiral groove of the connecting rod and the external thread of the third screw rod have opposite rotation directions.

[0013] Preferably, 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, 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, and a lifting plate is provided on the top of the workbench. 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.

[0014] Preferably, 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.

[0015] A powder metallurgy gear grinding process, using the above-mentioned powder metallurgy gear grinding device for grinding, comprises the following steps: S1: Put the three gears to be ground on the three connecting shafts respectively and put them in the middle; S2: Start the fourth motor to drive the second screws in the three connecting shafts to rotate forward, so that the first connecting rod and the second connecting rod in each sliding groove move toward the gear to be ground until the gear to be ground is clamped; S3: Then the second motor is started to drive the grinding disc to rotate and grind each gear to be ground in turn; S4: After the grinding is completed, the fourth motor is started to drive the second screws in the three connecting shafts to rotate in the opposite direction, thereby releasing the restriction on the gear to be ground; S5: Move the moving seat backwards, and then remove the polished gear from the connecting shaft.

[0016] Compared with the related art, the powder metallurgy gear grinding device provided by the present invention has the following beneficial effects: The present invention provides a powder metallurgy gear grinding device and a grinding process. Through the matching of a connecting shaft, a transmission shaft, an annular insert plate, a card slot and a slot, when the connecting shaft has problems such as wear and cracks, it can be quickly disassembled for repair or replacement, without spending a lot of time to disassemble the entire device, only the damaged gear shaft needs to be replaced, and there is no need to replace the entire complex component or device. Secondly, the gear shaft can be easily disassembled and fully cleaned to remove powder that may remain in the powder metallurgy process or debris generated in the grinding process. It can also be lubricated more evenly and effectively, reduce wear, and improve the gear The performance and life of the wheel axle; 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 to avoid the gear from moving due to the axial force during operation. Secondly, it can also realize convenient and quick installation and disassembly. When the gear needs to be replaced or repaired and maintained, the gear can be easily removed from the shaft or installed, and the position of the gear needs to be fine-tuned. The first connecting rod and the second connecting rod can be easily loosened and clamped again; 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; 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

[0017] Figure 1 A schematic structural diagram of a first embodiment of a powder metallurgy gear grinding device provided by the present invention; Figure 2 for Figure 1 A schematic cross-sectional view of a portion of the structure shown; Figure 3 for Figure 2 A schematic diagram of a portion of the structure shown; Figure 4 for Figure 3 A schematic cross-sectional view of the fixing seat shown; Figure 5 for Figure 4 An enlarged schematic diagram of the structure of section A is shown; Figure 6 for Figure 3 A schematic diagram of a portion of the structure shown; Figure 7 for Figure 3 The schematic diagram of the cooperation between the multiple connecting shafts and the multiple gears to be ground is shown; Figure 8 for Figure 7The schematic diagram of the cooperation between a single connecting shaft and a single gear to be ground is shown; Fig. 9 for Figure 8 The schematic cross-sectional view of the structure shown; Fig.10 for Fig. 9 An enlarged schematic diagram of the structure of part B is shown; Fig.11 for Fig. 9 A schematic side sectional plan view of the structure shown; Fig.12 for Figure 8 The schematic diagram of the cooperation between the annular plug plate and the card slot and the slot shown; Fig.13 for Fig.12 A schematic side sectional plan view of the structure shown; Fig.14 A schematic diagram of a second embodiment of a powder metallurgy gear grinding device provided by the present invention; Fig.15 for Fig.14 A schematic diagram of a portion of the structure shown; Fig.16 for Fig.15 A schematic cross-sectional view of a portion of the structure shown; Fig.17 for Fig.16 The schematic diagram of the cooperation between the second movable plate and the connecting rod shown; Fig.18 A schematic diagram of a third embodiment of a powder metallurgy gear grinding device provided by the present invention; Fig.19 for Fig.18 The schematic cross-sectional view of the fixed shaft, telescopic plate, gear cylinder and cylinder cover shown in the figure; Fig. 20 for Fig.19 The schematic diagram shown is after the cylinder cover is opened from the gear cylinder; Fig.21 for Fig.18 The first hydraulic cylinder, the third motor, the fourth screw rod and the L-shaped connecting plate are shown in the figure; Fig. 22 for Fig.21 Schematic diagram of the structure shown in the top view.

[0018] Numbers in the figure: 1, workbench; 2, fixed seat; 3, first motor; 4, mobile mechanical arm; 5, grinding disc; 6, gear cylinder; 7, moving seat; 8, cylinder cover; 9, first hydraulic cylinder; 10, dust box; 11, guide groove; 12, second motor; 13, gear to be ground; 14, connecting shaft; 15, fixed shaft; 16, rotating disk; 17, third motor; 18, transmission shaft; 19, fourth motor; 20, magnet; 21, short rod; 22, first sensor; 23, annular plug plate; 24, first connecting rod; 25, second connecting rod; 26, first screw; 27, slot; 28, slot; 29 , guide rod; 30, spring; 31, movable ring; 32, second screw; 33, first moving block; 34, second sensor; 35, bearing; 36, guide box; 37, third screw; 38, second hydraulic cylinder; 39, first moving plate; 40, second moving plate; 41, connecting rod; 42, first linkage gear; 43, circular shaft; 44, L-shaped support plate; 45, telescopic plate; 46, second linkage gear; 47, bump; 48, fixed plate; 49, lifting plate; 50, fourth screw; 51, L-shaped connecting plate; 52, dial plate; 53, fifth motor; 54, second moving block; 55, top seat. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0020] First embodiment: Please refer to Figure 1-Figure 13In the first embodiment of the present invention, the powder metallurgy gear grinding device includes: a workbench 1, a mobile mechanical arm 4, a grinding disc 5, a dust box 10, a guide groove 11 and a second motor 12, the mobile mechanical arm 4 is arranged on the top of the workbench 1, the second motor 12 is fixedly installed on the mobile mechanical arm 4, the grinding disc 5 is rotatably installed on the output shaft of the second motor 12, one side and the top of the workbench 1 are opened, the guide groove 11 is fixedly installed on the top inner wall of the workbench 1, the dust box 10 is arranged in the workbench 1, the top of the workbench 1 is fixedly installed with a fixed seat 2, the fixed seat 2 is fixedly installed with a first motor 3, the top of the workbench 1 A movable seat 7 is slidably installed on the part, and a locking structure is provided on one side of the movable seat 7. The locking structure can be locked when it moves to a specified position to prevent it from moving when grinding the gear. A rotating disk 16 is rotatably installed on the side of the fixed seat 2 close to the movable seat 7. The output shaft of the first motor 3 is fixedly connected to the rotating disk 16. A transmission shaft 18 is fixedly installed on one side of the rotating disk 16. A gear cylinder 6 is fixedly installed on the movable seat 7. A fixed shaft 15 is provided in the gear cylinder 6. Three connecting shafts 14 are provided at one end close to the fixed shaft 15 and the transmission shaft 18. The three connecting shafts 14 rotate at a certain angle so that the card on the annular plug plate 23 The block is rotated to the slot 28 to ensure that the annular plug plate 23 can be inserted into the connecting shaft 14, and when the connecting shaft 14 has problems such as wear and cracks, it can be quickly removed for repair or replacement, without spending a lot of time to disassemble the entire device, only the damaged gear shaft needs to be replaced, and there is no need to replace the entire complex component or device. The connecting shaft 14 is provided with an annular plug plate 23 at one end close to the first motor 3, and a card slot 27 and two slots 28 are opened at one end of the connecting shaft 14 away from the first motor 3. The two slots 28 and the card slot 27 are connected, and the outer sides of the three connecting shafts 14 are provided with gears to be ground 13, and the sliding arrangement in the connecting shaft 14 Two movable rings 31 are installed, and the same second screw rod 32 is rotatably installed on the two movable rings 31. The outer side of the second screw rod 32 is threadedly connected to two first moving blocks 33. The outer wall of the connecting shaft 14 is provided with four sliding grooves. One end of the second connecting rod 25 is hinged in the sliding groove, and the other end of the second connecting rod 25 is hinged to the first connecting rod 24. Short rods 21 are fixedly installed on both sides of the other end of the first connecting rod 24. The ends of the two short rods 21 away from each other extend into the connecting shaft 14 and are hinged to the corresponding first moving blocks 33. Both sides of the gear 13 to be ground are in contact with the corresponding gear 13 to be ground.

[0021] 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, the outer walls of the two second screw rods 32 are rotatably installed with bearings 35, the outer walls of the bearings 35 are fixedly installed on the inner wall of the movable ring 31, and the outer wall of the second screw rod 32 is symmetrically provided with two sections of external threads, and the rotation directions of the two sections of external threads are opposite.

[0022] Two springs 30 are sleeved on the outer side of the guide rod 29 . The two springs 30 are respectively located on both sides of the movable ring 31 . The two ends of the spring 30 are respectively fixedly connected to the connecting shaft 14 and the movable ring 31 .

[0023] Both ends of the second screw rod 32 are fixedly installed with connecting blocks, and a rectangular groove is provided on the connecting block near one end of the transmission shaft 18. A fourth motor 19 is fixedly installed in the transmission shaft 18, and rectangular protrusions are fixedly installed on the output shaft of the fourth motor 19 and on the connecting block near one end of the gear cylinder 6. The rectangular protrusions are adapted to the rectangular grooves, and a magnet 20 is fixedly installed on the rectangular protrusions. When the rectangular protrusions cannot be inserted into the rectangular grooves, one end of the second screw rods 32 in the other two connecting shafts 14 will be pushed out of the connecting shafts 14, and then the fourth motor 19 will be 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 32 can be firmly adsorbed by the magnet 20.

[0024] The working principle of the powder metallurgy gear grinding device provided by the present invention is as follows: First, the three connecting shafts 14 are rotated by a certain angle so that the block on the annular plug plate 23 is turned to the slot 28 to ensure that the annular plug plate 23 can be separated from the connecting shaft 14, and then the movable seat 7 is moved in the direction away from the fixed seat 2, and the three gears to be ground 13 are respectively mounted on the three connecting shafts 14, and then the movable seat 7 is pushed so that the fixed shaft 15 supports the three connecting shafts 14, and the fourth motor 19 is started. 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 relative to each other, and the gears to be ground 13 are clamped through the first connecting rod 24 and the second connecting rod 25, and then the second motor 12 is started. The output shaft of the second motor 12 drives the grinding disk 5 to rotate to grind the gear 13 to be ground. When the angle of the gear 13 to be ground needs to be adjusted, the first motor 3 is started, and the output shaft of the first motor 3 drives the rotating disk 16 to rotate, and the connection shaft 14 is driven to rotate through the transmission shaft 18 to achieve adjustment.

[0025] When one of the three connecting shafts 14 is damaged, the connecting shaft 14 is rotated by a certain angle so that the block on the annular plug plate 23 is turned to the slot 28 to separate it, and then it is replaced, and the annular plug plate 23 at one end of the undamaged connecting shaft 14 is inserted into the slot 28 and the card slot 27. At this time, the ends of the two second screw rods 32 that are away from each other are fixedly installed with connecting blocks, and the connecting blocks are provided with rectangular grooves and rectangular protrusions. When the rectangular protrusions cannot be inserted into the rectangular grooves, one end of the second screw rods 32 in the other two connecting shafts 14 will be pushed out of the connecting shaft 14, and the fourth motor 19 will be 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 by the magnet 20. When the output shaft drives the second screw rod 32 to rotate slowly, multiple rectangular protrusions will be inserted into the rectangular groove, so that the second screw rod 32 is restored to its original position, thus completing the replacement of the damaged connecting shaft 14.

[0026] Compared with the related art, the powder metallurgy gear grinding device provided by the present invention has the following beneficial effects: The present invention provides a powder metallurgy gear grinding device. Through the matching of a connecting shaft 14, a transmission shaft 18, an annular insert plate 23, a card slot 27 and a slot 28, when the connecting shaft 14 has problems such as wear and cracks, it can be quickly disassembled for repair or replacement, without spending a lot of time to disassemble the entire device, only the damaged gear shaft needs to be replaced, and the entire complex component or device does not need to be replaced. Secondly, the gear shaft can be easily disassembled and fully cleaned to remove powder that may remain in the powder metallurgy process or debris generated in the grinding process. It can also be lubricated more evenly and effectively, reduce wear, and improve the performance and life of the gear shaft; by 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 cooperate with each other. 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 due to the axial force during operation. Secondly, it can also achieve convenient and quick installation and disassembly. When the gear needs to be replaced or the gear needs to be repaired and maintained, the gear can be easily removed from or installed on the shaft, and if the position of the gear needs to be fine-tuned, the first connecting rod 24 and the second connecting rod 25 can be easily loosened and clamped again.

[0027] Second embodiment: Based on the powder metallurgy gear grinding device provided in the first embodiment of the present application, the second embodiment of the present application provides another powder metallurgy gear grinding device. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0028] The second embodiment of the present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0029] Please refer to Figure 14-17 The powder metallurgy gear grinding device also includes two guide boxes 36 fixedly mounted on the top of the workbench 1, and a third screw 37 and a connecting rod 41 are rotatably mounted in the two guide boxes 36. The outer side of the third screw 37 is threadedly connected with a second movable plate 40, and a first movable plate 39 is slidably mounted on the outer side of the connecting rod 41. L-shaped support plates 44 are fixedly mounted on the first movable plate 39 and the second movable plate 40, and a round shaft 43 is rotatably mounted on the L-shaped support plate 44. When the two round shafts 43 move relative to each other, the three gears 13 to be ground can be clamped to the center of the shaft, thereby facilitating the grinding of the grinding disc 5. The three gears 13 to be ground are ground at the same time. A single rack is integrally formed on the outer wall of the circular shaft 43, and the single rack is meshed with the gear 13 to be ground. The two circular shafts 43 are fixedly installed with a second linkage gear 46 at one end 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 meshed with the first linkage gear 42. Two second hydraulic cylinders 38 are fixedly installed on one side of the workbench 1. The telescopic end of the second hydraulic cylinder 38 passes through the workbench 1 and is fixedly connected to the corresponding first movable plate 39.

[0030] A spiral groove is disposed on the outer wall of the linkage rod 41 , and a protrusion 47 is fixedly installed in the second movable plate 40 , and the protrusion 47 slides in the spiral groove.

[0031] The spiral groove of the connecting rod 41 and the external thread of the third screw rod 37 have opposite rotation directions. This arrangement can achieve the clamping of the three gears 13 to be ground to the exact center of the shaft while the two circular shafts 43 move relative to each other.

[0032] When the gears are being ground, 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 movable plate 39 to move through the telescopic end. The protrusion 47 cooperates with the spiral groove on the connecting rod 41 to drive the connecting rod 41 and the third screw 37 to rotate at the same time, so that the first movable plate 39 and the second movable plate 40 move relative to each other. When moving a certain distance, the two second linkage gears 46 mesh with the first linkage gear 42, and the two circular shafts 43 mesh with the gear grooves of the three gears to be ground 13. When the two circular shafts 43 move relative to each other, the three gears to be ground 13 can be clamped to the center of the shaft, so that the grinding disc 5 can grind the three gears to be ground 13 at the same time. Through the arrangement of the above-mentioned components, the present invention can ensure that gears with different centers are located at the exact center of the shaft when installed on the connecting shaft 14, so that the coaxiality of the gear and the connecting shaft 14 can reach a high precision, reducing the vibration, noise and wear during gear transmission caused by coaxiality errors. 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.

[0033] Third embodiment: Based on the powder metallurgy gear grinding device provided in the second embodiment of the present application, the third embodiment of the present application provides another powder metallurgy gear grinding device. The third embodiment is only a preferred embodiment of the second embodiment, and the implementation of the third embodiment will not affect the independent implementation of the second embodiment.

[0034] The third embodiment of the present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0035] Please refer to Figure 18-22The powder metallurgy gear grinding device also includes a second sensor 34 fixedly mounted on the inner wall of the gear barrel 6. A barrel cover 8 is provided on the side of the gear barrel 6 away from the fixed seat 2. The barrel cover 8 and the outer wall of the gear barrel 6 are both provided with a second locking structure. When a plurality of gears 13 to be ground are sleeved on the fixed shaft 15, the barrel cover 8 and the gear barrel 6 can be locked to each other through the second locking structure. The fixed shaft 15 is fixedly mounted on the barrel cover 8. A first screw 26 is rotatably mounted in the fixed shaft 15. A fifth motor 53 is fixedly mounted on one side of the barrel cover 8. The fifth motor The output shaft of the machine 53 extends into the fixed shaft 15 and is fixedly connected to one end of the first screw 26. The outer side of the first screw 26 is threadedly connected to the second moving block 54. A top seat 55 is provided on the outer wall of the fixed shaft 15. A guide connecting plate is fixedly installed on the inner wall of the top seat 55. One end of the guide 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 fixed plate, which is hollow and has an inner sliding plate inside. The size of the plate is slightly smaller than the internal space of the outer fixed plate, so that it can slide freely therein and extend out of the outer fixed plate. The 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 fixedly connected to the lifting plate 49. Three fourth screws 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 three third The output shaft of the motor 17 is fixedly connected to one end of the three fourth screw rods 50 respectively, and the outer sides of the three fourth screw rods 50 are threadedly connected with an L-shaped connecting plate 51, one end of the L-shaped connecting plate 51 extends to the bottom of the lifting plate 49, and is fixedly installed with a paddle plate 52, and three first sensors 22 are fixedly installed on the top of the lifting plate 49, so that 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 during the grinding process.

[0036] Two fixing plates 48 are fixedly installed on the top of the workbench 1 , and the two first hydraulic cylinders 9 are fixedly installed on the top of the two fixing plates 48 , respectively.

[0037] 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.

[0038] 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 both sides of the gears to be ground are in contact with the corresponding gears to be ground.

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.

10. A grinding process for powder metallurgy gears, characterized in that: Grinding using the powder metallurgy gear grinding device according to any one of claims 1 to 9 comprises the following steps: S1: Put the three gears to be ground on the three connecting shafts respectively and put them in the middle; S2: Start the fourth motor to drive the second screws in the three connecting shafts to rotate forward, so that the first connecting rod and the second connecting rod in each sliding groove move toward the gear to be ground until the gear to be ground is clamped; S3: Then the second motor is started to drive the grinding disc to rotate and grind each gear to be ground in turn; S4: After the grinding is completed, the fourth motor is started to drive the second screws in the three connecting shafts to rotate in the opposite direction, thereby releasing the restriction on the gear to be ground; S5: Move the moving seat backwards, and then remove the polished gear from the connecting shaft.

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