Powder metallurgy gear sintering device

Abstract

The invention provides a powder metallurgy gear sintering device, and relates to the technical field of gear sintering. The powder metallurgy gear sintering device comprises a base, a sintering furnace, two first rollers, a chain net belt and a motor, a box body is arranged on the chain net belt, two limiting grooves are formed in the bottom of the box body and matched with the multiple fixing protruding plates, two second rollers are arranged in the box body, and the two second rollers are matched with the limiting grooves. Partition plates are fixedly installed at the two ends of the two second rollers, rotating shafts are fixedly installed on the sides, away from each other, of the two partition plates, and the other ends of the two rotating shafts extend out of the box body and are fixedly provided with first gears. The powder metallurgy gear sintering device has the advantages that use is convenient, operation is easy, the powder metallurgy gear can be automatically rotated, all parts of the powder metallurgy gear can make full contact with heat, and uneven heat distribution is avoided.

Description

Technical Field

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

[0002] Powder metallurgy is a process technology that produces metal powder or uses metal powder as raw material, and then forms and sinters it to manufacture metal materials, composite materials and various types of products. Powder metallurgy gears are a type of gear manufactured through powder metallurgy. In order to increase strength and density and improve physical and chemical properties, powder metallurgy gears need to be sintered. Because powder metallurgy gears are pressed from loose metal powder before sintering, the particles are only bonded by pressure and have low strength. During the sintering process, under the action of high temperature, the atoms between the powder particles can diffuse into each other to form a metallurgical bond.

[0003] However, when the traditional powder metallurgy gear sintering device sinters the gear, since the gear is in a stationary state during the sintering process, the part close to the heating source will be heated first, resulting in uneven temperature distribution and different sintering degrees in different parts of the gear. In addition, the stationary gear is not conducive to gas discharge, which can easily cause gas to be trapped inside the gear, forming defects such as pores, thereby reducing the density and mechanical properties of the gear.

[0004] Therefore, it is necessary to provide a powder metallurgy gear sintering device 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 sintering device which is easy to use, simple to operate, can automatically rotate the powder metallurgy gear and fully expose all parts of the gear to heat to avoid uneven heat distribution.

[0006] In order to solve the above technical problems, the powder metallurgy gear sintering device provided by the present invention includes: a base, a sintering furnace, two first rollers, a chain mesh belt and a motor, the sintering furnace is fixedly installed on the top of the base, the two first rollers are rotatably installed on the base, the chain mesh belt is sleeved on the outside of the two first rollers, the motor is fixedly installed on one side of the base, and the output shaft of the motor extends into the base and is fixedly connected to the corresponding first roller, a plurality of fixed convex plates are fixedly installed on the chain mesh belt, a box body is provided on the chain mesh belt, two limiting grooves are provided at the bottom of the box body, and the two limiting grooves are adapted to the plurality of fixed convex plates, and two second rollers are provided in the box body, and both ends of the two second rollers are fixed Partitions are installed, and a rotating shaft is fixedly installed on one side of the two partitions away from each other. The other ends of the two rotating shafts extend outside the box body and are fixedly installed with a first gear. Two second ceramic racks are also fixedly installed on the top of the base, and the first gear is meshed with the second ceramic rack. A plurality of placement seats are fixedly installed on the outer side of the second roller, and a placement plate is sleeved on the outer sides of the plurality of placement seats. Three movable rods are fixedly installed on the bottom of the placement plate, and the bottom ends of the three movable rods extend into the second roller. A first spring is sleeved on the outer side of the movable rod, and the two ends of the first spring are respectively fixedly connected to the placement plate and the second roller. A locking mechanism is also provided on the two partitions.

[0007] Preferably, the locking mechanism includes three limiting rods and a plurality of fixing ears, and the plurality of fixing ears are respectively fixedly mounted on the plurality of placement seats, and the three limiting rods respectively penetrate the corresponding plurality of fixing ears, and three protrusions are integrally formed on the outer ring of the partition, and the three limiting rods respectively penetrate the corresponding three protrusions and are slidably connected with the corresponding protrusions, and the other three protrusions are each provided with a slot and a stop groove, and the slot is connected to the stop groove, and two channels are provided on the inner wall of the slot, and the channels are connected to the stop groove, and one end of the three limiting rods extends into the three stop grooves respectively, and a push rod is fixedly mounted in the partition, and one end of the push rod extends into the limiting rod, and two first support rods are provided in the limiting rod, and the ends of the two first support rods away from the push rod extend into the stop groove.

[0008] Preferably, a bearing is rotatably mounted on the outer side of the rotating shaft, and the outer wall of the bearing is fixedly connected to the box body.

[0009] Preferably, a plurality of the placement seats and the two second rollers are provided with a plurality of communication holes, and both sides of the box body are provided with through openings.

[0010] Preferably, the locking mechanism includes three knob rods, a plurality of second gears, and a plurality of first ceramic racks. The three knob rods are rotatably installed in the second roller, and one ends of the three knob rods pass through the second roller and extend outside the rotating shaft. The plurality of second gears are fixedly installed on the three knob rods, respectively. The plurality of first ceramic racks are arranged in the second roller, and the plurality of second gears are respectively meshed with the plurality of first ceramic racks. One ends of the plurality of first ceramic racks extend into the plurality of placement seats and are fixedly installed with pressure blocks. The plurality of placement seats are provided with three moving blocks. The ends of the three moving blocks away from each other are fixedly installed with second support rods. The end of the second support rod away from the moving block extends outside the placement seat. The second support rod is fixedly installed with a second spring on the side close to the moving block, and the other end of the second spring is fixedly connected to the placement seat.

[0011] Preferably, the second spring is sleeved on the outer side of the moving block, and the three second support rods are distributed in a 120-degree rotational symmetry.

[0012] Preferably, one end of the three moving blocks away from the three second support rods and the outer side of the pressure block are both inclined surfaces, and the two inclined surfaces are adapted to each other. A top block is also fixedly installed on the top of the pressure block, and one end of the three moving blocks close to the pressure block are in contact with the top block.

[0013] Preferably, a metallurgical gear delivery seat is fixedly installed on the top of the base, three first conductive sheets are fixedly installed on one side of the metallurgical gear delivery seat, and second conductive sheets are fixedly installed on one end of the two rotating shafts close to the first conductive sheets, and the second conductive sheets are adapted to the first conductive sheets. Three pairs of gear delivery mechanisms are arranged in the metallurgical gear delivery seat, and the gear delivery mechanisms include three lifting seats slidably installed in the metallurgical gear delivery seat, and the same lifting plate is fixedly installed on the top of the three lifting seats, and one end of the lifting plate extends to the outside of the metallurgical gear delivery seat, and a first hydraulic cylinder is fixedly installed on the top of the metallurgical gear delivery seat, and the telescopic end of the first hydraulic cylinder is fixedly connected to the lifting plate, and multiple powder metallurgical gears are arranged in the three lifting seats, and second hydraulic cylinders are fixedly installed on both sides of the lifting seats, and a clamping block is fixedly installed on the telescopic end of the second hydraulic cylinder, and the clamping block extends into the lifting seat close to the side of the powder metallurgical gear and contacts with multiple powder metallurgical gears.

[0014] Preferably, a centralizing tube is fixedly mounted on the top of the lifting seat, and two gear-shaped guide rods are fixedly mounted inside the centralizing tube, and the gear-shaped guide rods are matched with the tooth grooves of the powder metallurgy gear.

[0015] Preferably, the number of the lifting seats in the three pairs of gear delivery mechanisms is the same as the number of the placement seats on any one of the second rollers.

[0016] Compared with the related art, the powder metallurgy gear sintering device provided by the present invention has the following beneficial effects: The present invention provides a powder metallurgy gear sintering device, which cooperates with a first roller, a chain mesh belt, a fixed convex plate, a motor, a second ceramic rack, a box body, a limiting groove and a first gear. During the sintering process, heat needs to be evenly transferred to various parts of the gear. In order to avoid local overheating or insufficient sintering caused by uneven heat distribution, when the chain mesh belt conveys the gear, the first gear is meshed with the second ceramic rack, which can realize the rotation of the gear in the box body and fully contact the heat to various parts of the gear, thereby ensuring that the physical and chemical properties of the entire gear are uniform. Secondly, during sintering, some gas impurities will be generated inside the gear. Rotation can make it easier for these impurities to be discharged from the tooth grooves and other parts, so as to avoid impurities remaining in the gear and affecting its performance; through the coordination of the rotating shaft, bearing, second roller, connecting hole, placement seat, partition, limiting rod, fixed ear, top block, first support rod, placement plate, movable rod and first spring, during the sintering process, the gear may be excessively displaced due to factors such as too fast rotation speed, thermal expansion or equipment vibration. When the limiting rod is passed through the fixed ear and inserted into the partition, the gear can be restricted to move within a reasonable range, thereby ensuring that each part of the gear is sintered in the preset position and space, and avoiding accidental disengagement of the gear or collision with other parts to produce fragments splashing; Through the coordination of the knob rod, the first ceramic rack, the second gear, the second support rod, the second spring, the moving block and the pressing block, during the gear rotation and sintering process, in order to prevent multiple gears from falling due to the centrifugal force generated by the rotation or mutual collision, by turning the knob rod, the second support rod can simultaneously fix and limit multiple powder metallurgy gears. When multiple gears are limited at the same time, each gear can be sintered in a specified position and state, thereby avoiding arbitrary movement or falling, which causes disruption to heat distribution and gas flow. Secondly, it can avoid the need to suspend production to clean and re-place the gears due to gear falling, thereby effectively reducing the situation of gear falling, allowing the sintering process to continue, and reducing the number and time of production interruptions. Since residues will be generated during the cleaning and sintering process, the fixed and limited gears will not hinder the cleaning work, and it can be more convenient to check whether the gears are damaged or poorly sintered. Through the cooperation of the second conductive sheet, the first hydraulic cylinder, the lifting plate, the central pipe, the second hydraulic cylinder, the lifting seat, the first conductive sheet, the gear-shaped guide rod and the clamping block, when the box moves a certain distance and makes the second conductive sheet contact with the first conductive sheet, the gears can be automatically placed and replenished in the box, thereby ensuring a continuous supply of gears during the sintering process, reducing the time interval for manual placement of gears and reducing the workload of manual placement of gears. When a box containing sintered gears is removed, a new box can be quickly replenished and automatically placed in the gears without waiting for manual operation, thereby achieving continuous and uninterrupted production. Secondly, the gears can be placed according to the preset number to ensure that the number of gears sintered each time is the same, avoiding the change in the number of gears during the powder metallurgy sintering process that affects the heat transfer, gas discharge and other processes, and ensuring that each gear can be sintered in a relatively consistent environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a first embodiment of a powder metallurgy gear sintering device provided by the present invention; Figure 2 for Figure 1 The schematic diagram of the box body shown is viewed from the bottom; Figure 3 for Figure 1 The schematic diagram of the structure of the box body shown; Figure 4 for Figure 3 The enlarged cross-sectional view of the limiting rod and the partition plate shown; Figure 5 for Figure 4 Another visual cross-sectional enlarged schematic diagram of the structure shown; Figure 6 for Figure 3 An enlarged schematic diagram of the structure of section A is shown; Figure 7 A schematic diagram of a second embodiment of a powder metallurgy gear sintering device provided by the present invention; Figure 8 for Figure 7 The enlarged cross-sectional view of the structure of part B is shown; Fig. 9 A schematic diagram of a third embodiment of a powder metallurgy gear sintering device provided by the present invention; Fig.10 for Fig. 9 The rear side view of the structure is shown; Fig.11 for Fig. 9 A schematic diagram of a portion of the structure shown; Fig.12 for Fig. 9 A schematic diagram of a portion of the structure shown; Fig.13 for Fig.12 The schematic cross-sectional view of the lifting seat and the central pipe shown; Fig.14 for Fig.13 Schematic diagram of partial structure disassembled cross-section shown.

[0018] Numbers in the figure: 1, base; 2, first roller; 3, motor; 4, sintering furnace; 5, rotating shaft; 6, box; 7, chain mesh belt; 8, partition; 9, placement seat; 10, pressing block; 11, second roller; 12, connecting hole; 13, through hole; 14, bearing; 15, fixing ear; 16, limiting rod; 17, first support rod; 18, retaining groove; 19, moving block; 20, first ceramic rack; 21, placement plate; 22, movable rod; 23, first spring; 24, first gear; 2 5. Second ceramic rack; 26. Fixed convex plate; 27. Second gear; 28. Limiting groove; 29. ​​First conductive sheet; 30. Metallurgical gear delivery seat; 31. First hydraulic cylinder; 32. Centralizing pipe; 33. Lifting plate; 34. Second hydraulic cylinder; 35. Lifting seat; 36. Clamping block; 37. Powder metallurgy gear; 38. Second spring; 39. Gear-shaped guide rod; 40. Second conductive sheet; 41. Second support rod; 42. Knob rod; 43. Slot; 44. Channel; 45. Top block. 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 6In the first embodiment of the present invention, the powder metallurgy gear sintering device includes: a base 1, a sintering furnace 4, two first rollers 2, a chain mesh belt 7, and a motor 3. The sintering furnace 4 is fixedly installed on the top of the base 1, and the two first rollers 2 are rotatably installed on the base 1. The chain mesh belt 7 is sleeved on the outside of the two first rollers 2. The motor 3 is fixedly installed on one side of the base 1, and the output shaft of the motor 3 extends into the base 1 and is fixedly connected to any one of the first rollers 2. A plurality of fixed convex plates 26 are fixedly installed on the chain mesh belt 7. A box body 6 is provided on the chain mesh belt 7. Two limiting grooves 28 are provided at the bottom of the box body 6. The two limiting grooves 28 are adapted to the plurality of fixed convex plates 26. When the fixed convex plates 26 are inserted into the limiting grooves 28 at the bottom of the box body 6, the chain mesh belt 7 can be prevented from moving when conveying the box body 6. Two second rollers 11 are provided in the box body 6. Both ends of the two second rollers 11 are fixedly installed with partitions 8. The two partitions 8 are fixedly installed with a rotating shaft 5 on the side away from each other, and the other ends of the two rotating shafts 5 extend to the outside of the box body 6 and are fixedly installed with a first gear 24. Two second ceramic racks 25 are also fixedly installed on the top of the base 1, and the first gear 24 is meshed with the second ceramic rack 25. A plurality of placement seats 9 are fixedly installed on the outer side of the second roller 11, and a placement plate 21 is sleeved on the outer sides of the plurality of placement seats 9. Three movable rods 22 are fixedly installed on the bottom of the placement plate 21, and the bottom ends of the three movable rods 22 extend into the second roller 11. The outer side of the movable rod 22 is sleeved with a first spring 23, and the two ends of the first spring 23 are fixedly connected to the placement plate 21 and the second roller 11 respectively. A locking mechanism is also provided on the two partitions 8. Through the locking mechanism, the movement of the gear can be limited within a reasonable range to ensure that the various parts of the gear are sintered in the preset position and space to avoid accidental disengagement of the gear due to excessive rotation speed or collision with other components to produce fragments splashing.

[0021] The locking mechanism includes three limiting rods 16 and multiple fixing ears 15, and the multiple fixing ears 15 are respectively fixedly installed on the multiple placement seats 9. The three limiting rods 16 respectively penetrate the corresponding multiple fixing ears 15. Three protrusions are integrally formed on the outer ring of the partition 8. The three limiting rods 16 all penetrate the corresponding three protrusions and are slidably connected with the corresponding protrusions. The other three protrusions are each provided with a slot 43 and a retaining groove 18, and the slot 43 is connected to the retaining groove 18. Two channels 44 are provided on the inner wall of the slot 43, and the channels 44 are connected to the retaining groove 18. One ends of the three limiting rods 16 extend into the three retaining grooves 18 respectively. A push rod is fixedly installed in the partition 8, and one end of the push rod extends into the limiting rod 16. Two first support rods 17 are provided in the limiting rod 16, and the ends of the two first support rods 17 away from the push rod extend into the retaining groove.

[0022] A bearing 14 is rotatably mounted on the outer side of the rotating shaft 5 , and the outer wall of the bearing 14 is fixedly connected to the box body 6 .

[0023] Multiple placement seats 9 and two second rollers 11 are provided with multiple connecting holes 12, and both sides of the box body 6 are provided with through holes 13. Gas will be generated during the powder metallurgy sintering process, and the connecting holes 12 can allow these gases to be discharged in time. The connecting holes 12 are also conducive to better heat exchange inside and outside the roller. The hot air can enter the interior of the roller through the through holes 13, so that the gears can be heated more fully and evenly, further optimizing the sintering effect.

[0024] The working principle of the powder metallurgy gear sintering device provided by the present invention is as follows: The first step: place the box body 6 on the chain mesh belt 7, so that the fixed convex plate 26 on the chain mesh belt 7 is embedded in the limiting groove 28 at the bottom of the box body 6 to ensure that the box body 6 will not shake at will when moving, and then start the motor 3. The output shaft of the motor 3 drives the first roller 2 to rotate, and the first roller 2 drives the chain mesh belt 7 to transport the box body 6. When the box body 6 is transported, the first gear 24 engages with the second ceramic rack 25 to rotate the second roller 11, so that the powder metallurgy gear 37 in the box body 6 can be rotated, so that all parts of the powder metallurgy gear 37 are fully exposed to heat.

[0025] Step 2: When powder metallurgy gears 37 are placed on multiple placement seats 9, one end of the limiting rod 16 is passed through the partition 8 and multiple fixing ears 15 and inserted into the corresponding retaining groove 18 in the partition 8, one end of the top rod is inserted into the limiting rod 16, the two first support rods 17 expand outward, and the ends of the two first support rods 17 away from each other extend into the retaining groove 18, and then the limiting rod 16 is rotated. In this way, the gear can be limited to move within a reasonable range. When the limiting rod 16 needs to be pulled out, the limiting rod 16 can be rotated in the opposite direction.

[0026] Compared with the related art, the powder metallurgy gear sintering device provided by the present invention has the following beneficial effects: Through the cooperation of the first roller 2, the chain mesh belt 7, the fixed convex plate 26, the motor 3, the second ceramic rack 25, the box 6, the limiting groove 28 and the first gear 24, during the sintering process, the heat needs to be evenly transferred to various parts of the gear. In order to avoid local overheating or insufficient sintering caused by uneven heat distribution, when the chain mesh belt 7 is conveying the gear, the first gear 24 is meshed with the second ceramic rack 25, which can realize the rotation of the gear in the box 6 and fully contact the heat to various parts of it, thereby ensuring that the physical and chemical properties of the entire gear are uniform. Secondly, during sintering, some gas impurities will be generated inside the gear, and these impurities can be more easily removed from the gear through rotation. The impurities are discharged from the tooth grooves and other parts to avoid impurities remaining in the gear and affecting its performance; through the cooperation of the rotating shaft 5, the bearing 14, the second roller 11, the connecting hole 12, the placement seat 9, the partition 8, the limiting rod 16, the fixed ear 15, the retaining groove 18, the first support rod 17, the placement plate 21, the movable rod 22 and the first spring 23, during the sintering process, the gear may be excessively displaced due to factors such as excessive rotation speed, thermal expansion or equipment vibration. When the limiting rod 16 passes through the fixed ear 15 and is inserted into the partition 8, the movement of the gear can be limited within a reasonable range, thereby ensuring that the various parts of the gear are sintered in the preset position and space, avoiding accidental disengagement of the gear or collision with other parts to produce fragments flying.

[0027] Second embodiment: Based on the powder metallurgy gear sintering device provided in the first embodiment of the present application, the second embodiment of the present application provides another powder metallurgy gear sintering 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 7-Figure 8In the powder metallurgy gear sintering device provided in this embodiment, the locking mechanism is in another form, which includes three knob rods 42, multiple second gears 27 and multiple first ceramic racks 20. The three knob rods 42 are all rotatably installed in the second roller 11, and one end of the three knob rods 42 passes through the second roller 11 and extends to the outside of the rotating shaft 5. The multiple second gears 27 are respectively fixedly installed on the three knob rods 42. The multiple first ceramic racks 20 are all arranged in the second roller 11. The multiple second gears 27 are respectively meshed with the multiple first ceramic racks 20. One end of the multiple first ceramic racks 20 extends into the multiple placement seats 9 and is fixedly installed with a pressing block 10. Three moving blocks 19 are provided in the multiple placement seats 9. The ends of the three moving blocks 19 away from each other are fixedly installed with a second support rod 41. The end of the second support rod 41 away from the moving block 19 extends to the outside of the placement seat 9. The second support rod 41 is fixedly installed with a second spring 38 on the side close to the moving block 19, and the other end of the second spring 38 is fixedly connected to the placement seat 9.

[0030] The second spring 38 is sleeved on the outer side of the moving block 19 , and the three second support rods 41 are distributed in a 120-degree rotational symmetry.

[0031] The ends of the three moving blocks 19 away from the three second support rods 41 and the outer side of the pressing block 10 are both inclined surfaces, and the two inclined surfaces are adapted to each other. A top block 45 is also fixedly installed on the top of the pressing block 10, and the ends of the three moving blocks 19 close to the pressing block 10 are in contact with the top block 45.

[0032] In this embodiment: When the powder metallurgy gear 37 is sleeved on the placement seat 9, the knob rod 42 is rotated to make the second gear 27 drive the first ceramic rack 20 to rise when rotating, and the first ceramic rack 20 drives the pressure block 10 to rise and squeeze the three moving blocks 19, and the moving block 19 drives one end of the second support rod 41 to extend outside the placement seat 9. When the second spring 38 drives the second support rod 41 to reset, the top block 45 can prevent the second support rod 41 from retracting into the placement seat 9. In this way, multiple powder metallurgy gears 37 can be limited at the same time. When the powder metallurgy gear 37 needs to be taken out, the knob rod 42 is rotated in the opposite direction to make the second gear 27 drive the first ceramic rack 20 to descend when rotating, and the pressure block 10 no longer squeezes the moving block 19. The second spring 38 drives the second support rod 41 to retract into the placement seat 9 by resetting, so that the powder metallurgy gear 37 can be taken out. Take out. Through the arrangement of the above-mentioned components, during the gear rotation and sintering process, in order to prevent multiple gears from falling due to the centrifugal force generated by the rotation or mutual collision, the second support rod 41 can be used to fix and limit multiple powder metallurgy gears at the same time by rotating the knob rod 42. When multiple gears are limited at the same time, each gear can be sintered in a specified position and state, thereby avoiding arbitrary movement or falling, which would disrupt heat distribution and gas flow. Secondly, it can avoid the need to suspend production to clean and re-place the gears due to gear falling, thereby effectively reducing the situation of gear falling, allowing the sintering process to continue, and reducing the number and time of production interruptions. Since residues will be generated during the cleaning and sintering process, the fixed and limited gears will not hinder the cleaning work, and it is more convenient to check whether the gears are damaged or poorly sintered.

[0033] Third embodiment: Based on the powder metallurgy gear sintering device provided in the second embodiment of the present application, the third embodiment of the present application provides another powder metallurgy gear sintering 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 9-14In the powder metallurgy gear sintering device provided in this embodiment, it also includes a metallurgical gear delivery seat 30 fixedly installed on the top of the base 1, and three first conductive sheets 29 are fixedly installed on one side of the metallurgical gear delivery seat 30. The ends of the two rotating shafts 5 close to the first conductive sheets 29 are fixedly installed with second conductive sheets 40, and the second conductive sheets 40 are adapted to the first conductive sheets 29. When the box 6 moves to a certain distance and makes the two second conductive sheets 40 contact the three first conductive sheets 29 in sequence, the three pairs of gear delivery machines can be lowered in sequence to automatically deliver and replenish gears in the box 6, thereby ensuring a continuous supply of gears during the sintering process. The metallurgical gear delivery seat 30 is provided with three pairs of gear delivery mechanisms. The gear delivery mechanism includes three lifting seats 35 slidably installed in the metallurgical gear delivery seat 30, and the same lifting plate 33 is fixedly installed on the top of the three lifting seats 35. One end of the lifting plate 33 extends to the outside of the metallurgical gear delivery seat 30. A first hydraulic cylinder 31 is fixedly installed on the top of the metallurgical gear delivery seat 30, and the telescopic end of the first hydraulic cylinder 31 is fixedly connected to the lifting plate 33. A plurality of powder metallurgical gears 37 are arranged in the three lifting seats 35. A second hydraulic cylinder 34 is fixedly installed on both sides of the lifting seats 35, and a clamping block 36 is fixedly installed on the telescopic end of the second hydraulic cylinder 34. The clamping block 36 extends into the lifting seat 35 close to the powder metallurgical gear 37 and contacts with the plurality of powder metallurgical gears 37.

[0036] A centralizing tube 32 is fixedly installed on the top of the lifting seat 35 , and two gear-shaped guide rods 39 are fixedly installed inside the centralizing tube 32 . The gear-shaped guide rods 39 can keep multiple powder metallurgy gears 37 in the same direction and state, and the gear-shaped guide rods 39 are adapted to the tooth grooves of the powder metallurgy gears 37 .

[0037] The number of the lifting seats 35 in the three pairs of gear delivery mechanisms is the same as the number of the placement seats 9 on any one of the second rollers 11 .

[0038] In this embodiment, when the box body 6 moves to a certain distance and makes the two second conductive sheets 40 contact the three first conductive sheets 29 in sequence, the first hydraulic cylinder 31 drives the lifting plate 33 to descend, and the lifting plate 33 drives the lifting seat 35 to descend. When it descends to a certain height, the second hydraulic cylinder 34 drives the clamping block 36 to no longer clamp the powder metallurgy gear 37, and the first powder metallurgy gear 37 at the bottom falls on the placement seat 9. Then, due to inertia, the remaining powder metallurgy gears 37 in the lifting seat 35 descend. At this time, the second hydraulic cylinder 34 is started, and the second hydraulic cylinder 34 drives the clamping block 36 to clamp the remaining powder metallurgy gears 37 again. Then, when the box body 6 moves, the second conductive sheet 40 no longer contacts the first conductive sheet 29, and the first hydraulic cylinder 31 drives the lifting plate 33 to rise, so that the lifting seat 35 is far away from the placement seat 9, so that the automatic delivery and replenishment of gears are completed. The present invention can realize automatic delivery and replenishment of gears in the box 6 through the arrangement of the above-mentioned components, thereby ensuring a continuous supply of gears during the sintering process, reducing the time interval for manual delivery of gears and reducing the workload of manual delivery of gears. When a box with sintered gears is removed, a new box can be quickly replenished and automatically deliver the gears without waiting for manual operation, thereby achieving continuous and uninterrupted production. Secondly, the gears can be delivered according to the preset number to ensure that the number of gears sintered each time is the same, avoiding the change in the number of gears during the powder metallurgy sintering process that affects the heat transfer, gas discharge and other processes, and ensuring that each gear can be sintered in a relatively consistent environment.

[0039] 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 sintering device, comprising a base, a sintering furnace, two first rollers, a chain mesh belt and a motor, wherein the sintering furnace is fixedly mounted on the top of the base, the two first rollers are rotatably mounted on the base, the chain mesh belt is sleeved on the outside of the two first rollers, the motor is fixedly mounted on one side of the base, and the output shaft of the motor extends into the base and is fixedly connected to the corresponding first roller, characterized in that: The chain mesh belt is fixedly installed with multiple fixed convex plates, and the chain mesh belt is provided with a box body, and two limiting grooves are provided at the bottom of the box body, and the two limiting grooves are adapted to the multiple fixed convex plates, and two second rollers are arranged in the box body, and partitions are fixedly installed at both ends of the two second rollers, and a rotating shaft is fixedly installed on the side where the two partitions are away from each other, and the other ends of the two rotating shafts extend outside the box body and are fixedly installed with a first gear, and two second ceramic racks are also fixedly installed on the top of the base, and the first gear is meshed with the second ceramic rack, and multiple placement seats are fixedly installed on the outer side of the second roller, and placement plates are sleeved on the outer sides of the multiple placement seats, and three movable rods are fixedly installed on the bottom of the placement plate, and the bottom ends of the three movable rods extend into the second roller, and a first spring is sleeved on the outer side of the movable rod, and the two ends of the first spring are fixedly connected to the placement plate and the second roller respectively, and a locking mechanism is also provided on the two partitions.

2. The powder metallurgy gear sintering device according to claim 1, characterized in that: The locking mechanism includes three limiting rods and multiple fixing ears, and the multiple fixing ears are respectively fixedly installed on the multiple placement seats, and the three limiting rods respectively penetrate the corresponding multiple fixing ears. Three protrusions are integrally formed on the outer ring of the partition, and the three limiting rods respectively penetrate the corresponding three protrusions and are slidably connected with the corresponding protrusions. The other three protrusions are each provided with a slot and a stop groove, and the slot is connected to the stop groove. Two channels are provided on the inner wall of the slot, and the channels are connected to the stop groove. One end of the three limiting rods extends into the three stop grooves respectively, and a push rod is fixedly installed in the partition, and one end of the push rod extends into the limiting rod. Two first support rods are provided in the limiting rod, and the ends of the two first support rods away from the push rod extend into the stop groove.

3. The powder metallurgy gear sintering device according to claim 1, characterized in that: A bearing is rotatably mounted on the outer side of the rotating shaft, and an outer wall of the bearing is fixedly connected to the box body.

4. The powder metallurgy gear sintering device according to claim 1, characterized in that: A plurality of the placement seats and the two second rollers are provided with a plurality of communication holes, and both sides of the box body are provided with through openings.

5. The powder metallurgy gear sintering device according to claim 1, characterized in that: The locking mechanism includes three knob rods, multiple second gears and multiple first ceramic racks. The three knob rods are rotatably installed in the second roller, and one ends of the three knob rods penetrate the second roller and extend to the outside of the rotating shaft. The multiple second gears are fixedly installed on the three knob rods, respectively. The multiple first ceramic racks are arranged in the second roller, and the multiple second gears are respectively meshed with the multiple first ceramic racks. One ends of the multiple first ceramic racks extend into the multiple placement seats and are fixedly installed with pressure blocks. Three moving blocks are provided in the multiple placement seats, and the ends of the three moving blocks away from each other are fixedly installed with second support rods. The end of the second support rod away from the moving block extends to the outside of the placement seat, and a second spring is fixedly installed on the side of the second support rod close to the moving block, and the other end of the second spring is fixedly connected to the placement seat.

6. The powder metallurgy gear sintering device according to claim 5, characterized in that: The second spring is sleeved on the outer side of the moving block, and the three second support rods are distributed in a 120-degree rotational symmetry.

7. The powder metallurgy gear sintering device according to claim 5, characterized in that: The ends of the three moving blocks away from the three second support rods and the outer sides of the pressing blocks are all inclined surfaces, and the two inclined surfaces are adapted to each other. A top block is also fixedly installed on the top of the pressing block, and the ends of the three moving blocks close to the pressing blocks are in contact with the top block.

8. The powder metallurgy gear sintering device according to claim 1, characterized in that: A metallurgical gear delivery seat is fixedly installed on the top of the base, three first conductive sheets are fixedly installed on one side of the metallurgical gear delivery seat, and second conductive sheets are fixedly installed on one end of the two rotating shafts close to the first conductive sheets, and the second conductive sheets are adapted to the first conductive sheets. Three pairs of gear delivery mechanisms are arranged in the metallurgical gear delivery seat, and the gear delivery mechanisms include three lifting seats slidably installed in the metallurgical gear delivery seat, and the same lifting plate is fixedly installed on the top of the three lifting seats, and one end of the lifting plate extends to the outside of the metallurgical gear delivery seat, and a first hydraulic cylinder is fixedly installed on the top of the metallurgical gear delivery seat, and the telescopic end of the first hydraulic cylinder is fixedly connected to the lifting plate, and multiple powder metallurgical gears are arranged in the three lifting seats, and second hydraulic cylinders are fixedly installed on both sides of the lifting seats, and a clamping block is fixedly installed on the telescopic end of the second hydraulic cylinder, and the clamping block extends into the lifting seat close to the side of the powder metallurgical gear and contacts with multiple powder metallurgical gears.

9. The powder metallurgy gear sintering device according to claim 8, characterized in that: A centralizing tube is fixedly installed on the top of the lifting seat, and two gear-shaped guide rods are fixedly installed in the centralizing tube. The gear-shaped guide rods are matched with the tooth grooves of the powder metallurgy gear.

10. The powder metallurgy gear sintering device according to claim 8, characterized in that: The number of the lifting seats in the three pairs of gear delivery mechanisms is the same as the number of the placement seats on any one of the second rollers.

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