Carburizing and quenching heat treatment device for gear machining

Abstract

The invention relates to the technical field of heat treatment equipment, in particular to a carburizing and quenching heat treatment device for gear machining, which comprises a shell, a heating mechanism and a fan, the heating mechanism is mounted on the shell, the fan is fixedly connected inside the shell, and a pickup door is hinged to the shell; according to the carburizing and quenching heat treatment device for gear machining, the driving assembly is arranged in the carburizing and quenching heat treatment device for gear machining, the driving assembly can drive trays in the carburizing and quenching heat treatment device for gear machining to move back and forth, and when one tray arrives at the workpiece taking cavity, the two trays are located on the workpiece taking channel and the workpiece feeding channel correspondingly; the heating cavity and the workpiece taking cavity are separated from each other, so that the design ensures that heat in the heating cavity cannot be lost in the continuous working process, the reheating time and energy consumption are saved, more gears are dispersedly placed in the design, enough gaps are formed between the gears, and the service life of the gears is prolonged. And carburizing gas can better circulate among the gears, so that the carburizing efficiency of the gears is improved.

Description

Technical Field

[0001] This invention relates to the field of heat treatment equipment technology, specifically to a carburizing and quenching heat treatment device for gear machining. Background Technology

[0002] Gear carburizing and quenching equipment is a key piece of equipment for surface strengthening treatment of gears. It mainly consists of a carburizing furnace and a quenching tank. The carburizing furnace adds carbon to the surface of the gear, and the quenching tank achieves rapid cooling. After the gears are treated by gear carburizing and quenching equipment, they can obtain good wear resistance and fatigue resistance, and improve service life and transmission performance.

[0003] After carburizing gears in a conventional small box-type carburizing furnace, when the furnace door needs to be opened to remove the gears, the high-temperature environment inside the furnace comes into rapid contact with the ambient temperature outside. A large amount of heat is quickly dissipated into the surrounding environment. When a new workpiece is placed in, the temperature inside the furnace drops significantly. In order to allow the new workpiece to undergo carburizing treatment under suitable temperature conditions, the furnace needs to be reheated to bring its temperature back to the required process temperature. This inevitably takes a certain amount of time, and reheating also increases energy consumption.

[0004] To address the aforementioned problems, existing technologies offer several solutions. For example, patent application number CN202322297856.7 describes a continuously operating vacuum carburizing furnace, comprising a furnace body with a detachably connected furnace cover. A vacuum pump and an inlet pipe are connected to the outer wall of the furnace body, and a heating mechanism is located within the furnace body. A through groove is opened at the bottom of the furnace body, and a base is fitted within the groove. A first baffle and a second baffle are respectively provided on both sides of the through groove on the inner wall of the furnace body. Symmetrical partitions are provided on both sides of the top of the base. This invention reduces heat loss inside the furnace body when changing products. When processing new products, the temperature can be raised to the required level more quickly, facilitating continuous product processing and reducing energy waste. While this invention solves the energy waste problem, it requires adding a new gear only after one part is removed. Furthermore, when the workload is large and multiple workpieces need to be carburized, this solution can only stack multiple workpieces on a single base, affecting the internal carburizing gas flow and reducing carburizing efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a carburizing and quenching heat treatment apparatus for gear processing, in order to solve the problem that after gear carburizing is completed, when the furnace door is opened, the high temperature heat inside the furnace will be quickly dissipated into the surrounding environment, requiring the furnace to be reheated to bring the temperature back to the required process temperature, which consumes a certain amount of time and increases energy consumption.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A carburizing and quenching heat treatment device for gear machining includes a housing, a heating mechanism, and a fan. The heating mechanism is mounted on the housing, and the fan is fixedly connected inside the housing. A part-retrieving door is hinged to the housing, and a handle is provided on the part-retrieving door. One end of the handle is fixedly connected to a screw, and the other end of the screw is threadedly connected to the housing. A heating chamber and a part-retrieving chamber are formed inside the housing. A part-retrieving channel and a part-loading channel are formed on the housing, connecting the heating chamber and the part-retrieving chamber. The fan is located inside the heating chamber. A drive assembly is provided on the housing. Multiple trays are arranged inside the housing, and each tray has a ventilation groove. All trays are connected to the drive assembly. All sides of each tray are in contact with the inner walls of the heating chamber and the part-retrieving chamber. The drive assembly is used to drive the trays to move back and forth between the heating chamber and the part-retrieving chamber.

[0008] As is easily understood, this design incorporates a drive assembly within the gear carburizing and quenching heat treatment apparatus. This drive assembly moves a pallet within the apparatus back and forth. The pallet travels from the pick-up channel to the pick-up chamber, then into the loading channel, and finally into the heating chamber. The drive assembly continuously cycles through these pallets. When one pallet reaches the pick-up chamber, two pallets are positioned in the pick-up and loading channels, respectively, isolating the heating and pick-up chambers. This prevents heat loss from the heating chamber to the pick-up and pick-up chambers, ensuring continuous operation and saving reheating time and energy. Furthermore, this design allows for multiple pallets within the heating chamber, enabling the placement of more gears and ensuring sufficient clearance between each gear. This allows for better flow of carburizing gas, improving the efficiency of gear carburizing.

[0009] Preferably, the drive assembly includes a motor, which is fixedly connected to the housing. A drive gear is fixedly connected to the output end of the motor. A connecting rod is rotatably connected to the housing, and a transmission gear is fixedly connected to the connecting rod. The drive gear and the transmission gear mesh. One end of the connecting rod extends into the housing. An X-shaped rotating rod is fixedly connected to the end of the connecting rod inside the housing. Multiple telescopic rods are slidably connected to the X-shaped rotating rod. A hinge rod is fixedly connected to one end of the telescopic rod. A sliding groove is also provided inside the housing. The hinge rod is slidably connected inside the sliding groove. The tray is hinged to the hinge rod. A sealing plate is provided inside the housing. The sealing plate is in contact with the surfaces of the X-shaped rotating rod and the telescopic rods. The hinge rod is in contact with the inner wall of the sliding groove and the outer side of the sealing plate.

[0010] As is easily understood, this design, through the setting of an X-shaped rotating rod and a telescopic rod, allows the telescopic rod to move along the sliding groove when the motor drives the X-shaped rotating rod to rotate. When one side of the tray is about to leave the picking channel, the tray located on the inner wall of the heating chamber will enter the picking channel, and when the other side of the tray is about to leave the loading channel, the tray located in the picking chamber will enter the loading channel. Therefore, the heating chamber is kept sealed during the operation of the drive assembly, avoiding heat loss and saving time and energy. Furthermore, since the telescopic rod is slidably connected to the X-shaped rotating rod, and both the X-shaped rotating rod and the telescopic rod are in contact with the sealing plate, heat cannot be lost from the drive assembly, further preventing heat loss and saving time and energy.

[0011] Preferably, a clamping block is slidably connected inside the housing, one end of the clamping block is in contact with the sealing plate, a clamping plate is slidably connected on the housing, the clamping plate is in contact with the other end of the clamping block, and the tray, clamping block and clamping plate are in contact, and one end of the screw extends into the housing and contacts the clamping plate.

[0012] It's easy to understand that during hot working, the heat inside the heating chamber is higher than that inside the part-retrieving chamber, resulting in higher pressure inside the heating chamber. When carburizing gas is introduced into the heating chamber to carburize the gear, the high pressure inside the heating chamber may cause the carburizing gas to leak through the contact surfaces of the X-shaped rotating rod and telescopic rod with the sealing plate, as well as the contact surfaces of the tray and the outer shell. This design addresses this by installing a pressure plate and a pressure block on the outer shell. When the operator closes the part-retrieving door and turns the handle on the door, the handle pushes the pressure plate, which then presses against the pressure block. The pressure block, in turn, presses against the sealing plate, allowing for a better fit between the sealing plate and the X-shaped rotating rod and telescopic rod. The pressure plate also presses against the tray located in the part-retrieving and loading channels, resulting in a better fit between the tray and the outer shell and the pressure plate. This allows for better sealing of the heating chamber during carburizing, preventing leakage of carburizing gas and thus reducing carburizing efficiency. Therefore, this design improves the sealing performance of the heating chamber and ensures the carburizing efficiency of the gear.

[0013] Preferably, the clamping block is provided with a sliding plate, the sliding plate is slidably connected to the clamping block, the sliding plate is located on one side of the loading channel and in contact with the tray, a spring is provided between the sliding plate and the clamping block, a lifting block is hinged to the sliding plate on one side of the heating chamber, and a torsion spring is provided at the hinge point between the lifting block and the sliding plate.

[0014] As is easily understood, when the drive assembly moves the four trays inside the drive chamber, in order to ensure the isolation between the heating chamber and the part-retrieving chamber throughout the process, it is necessary for one tray to leave the part-loading channel as another tray immediately enters the part-loading channel. This requires the part-loading channel to extend into the heating chamber, which in turn causes the trays located on the part-loading channel to be blocked, thus affecting the flow of carburizing gas. This design solves this problem by setting a sliding plate on the clamping block. When the tray moves, the tray will lift the sliding plate by the lifting block, and the movement of the sliding plate will complete the extension of the part-loading channel. When the tray is completely away from the part-loading channel, the sliding plate will return to its original position. Therefore, this design not only ensures the sealing of the heating chamber when the tray leaves the part-loading channel, but also ensures that the flow of carburizing gas in the heating chamber is not affected during the operation of the heating chamber, thus ensuring the efficiency of gear carburizing inside the heating chamber.

[0015] Preferably, a rectangular slider is provided on one side of the tray, the rectangular slider is fixedly connected to the tray, the rectangular slider extends into the sliding groove, and both sides of the rectangular slider are in contact with the sides of the sliding groove. Rectangular grooves are provided on the inner walls of the heating chamber and the part removal chamber, and one side of the rectangular slider is in contact with the rectangular groove.

[0016] As is easily understood, since the pallet is connected to the hinge rod via a hinge, and the pallet needs to remain level throughout operation to prevent the gears on the pallet from falling off, this design utilizes a rectangular slider on one side of the pallet. This slider moves with the pallet, with its sides conforming to the sides of the sliding groove and the bottom of the pallet conforming to the rectangular groove. Therefore, the rectangular slider cannot tilt during movement, ensuring the pallet remains stable during operation.

[0017] Preferably, the X-shaped rotating rod includes a rotating rod one and a rotating rod two. A connecting rod two is also rotatably connected to the outer casing. The rotating rod one and the rotating rod two are installed at intervals. The connecting rod two is coaxially arranged with the connecting rod. The connecting rod one is fixedly connected to the rotating rod one, and the connecting rod two is fixedly connected to the rotating rod two. Both ends of the rotating rod one and the rotating rod two are slidably connected to the telescopic rod. A transmission gear two is fixedly connected to the connecting rod two. A drive gear two is also fixedly connected to the motor output end. The transmission gear two and the drive gear two mesh with each other. Both the drive gear one and the drive gear two have toothless grooves, and the drive gear one and the drive gear two are installed in a staggered manner.

[0018] It's easy to understand that, as the drive assembly moves the four trays inside the drive system, to ensure complete isolation between the heating chamber and the part-picking chamber, another tray needs to immediately enter the part-picking or part-loading channel just as one tray is about to leave. This ensures that there is always a tray for isolation within the part-picking or part-loading channel. Therefore, the length of the part-picking or part-loading channel needs to be longer. However, this results in the part-picking or part-loading channel occupying more area, affecting the flow of carburizing gas inside the heating chamber and its capacity. This design addresses this by setting non-removable components on transmission gear one and transmission gear two... The gear teeth are designed to be intermittently moved. For example, when the tray inside the heating chamber begins to move, the tray in the picking channel will not move. Only when the two trays approach a certain distance will the tray in the picking channel move. The same applies to the tray in the loading channel. Therefore, during the movement, the distance between the two trays will first approach each other, thus shortening the length of the picking channel or loading channel, saving internal space in the heating chamber and picking chamber, ensuring the flow of carburizing gas inside the heating chamber, and guaranteeing the carburizing efficiency of the gears.

[0019] Preferably, the inner wall of the outer shell and the retrieval door are provided with isolation grooves. The isolation grooves on both sides are far away from the retrieval channel and the loading channel. The distance between one side plane of the isolation groove and the tray is x, where x ≧ 1 mm.

[0020] As is easily understood, when the drive assembly moves the tray along the inner wall of the housing, the side of the tray away from the telescopic rod will contact the housing and rub against it during movement. Over time, this will cause severe wear on one side of the telescopic rod, leading to a decrease in the sealing effect of the tray on the picking and loading channels. This design addresses this by creating isolation grooves on the inner wall of the housing and the picking door. When the tray moves to the location of the isolation groove, it will not contact the inner wall of the housing or the picking door, thereby reducing wear on the tray during operation, increasing its service life, and ensuring the sealing effect of the tray on the picking and loading channels.

[0021] Preferably, two support rods are slidably connected in the isolation groove located on the inner wall of the heating chamber. A spring is provided between the support rod and the inner wall of the isolation groove. The side of the support rod near the picking chamber is chamfered, and the tray contacts the side of the support rod without chamfer.

[0022] As is easily understood, when the retrieval door closes and the gears inside the heating chamber begin carburizing, the pallets located in the loading and retrieval channels are better supported due to the pressure of the clamping plate. However, the pallet completely inside the heating chamber lacks support and is subjected to the weight of the gears and the pressure of the carburizing gas blown by the fan. This results in a large torque on the hinge rod, making it prone to bending or even breakage. This design addresses this by installing a support rod inside the heating chamber. When the pallet moves completely into the heating chamber, it contacts the support rod and presses against the chamfer on one side of the support rod to the other side. At this point, the support rod supports the pallet. Therefore, this design ensures the pallet's support inside the heating chamber, preventing the hinge rod from bending or breaking due to large torque, and improving the service life of both the pallet and the hinge rod.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. This design incorporates a drive assembly inside the carburizing and quenching heat treatment device for gear processing. This drive assembly moves the trays inside the device back and forth. When one tray arrives at the part-removing chamber, two trays are positioned in the part-removing channel and the part-loading channel, respectively, isolating the heating chamber and the part-removing chamber from each other. Therefore, this design ensures that heat inside the heating chamber is not lost during continuous operation, saving reheating time and energy. Furthermore, this design allows for the placement of more gears in a dispersed manner, with sufficient clearance between each gear, enabling better flow of carburizing gas between the gears and improving the efficiency of gear carburizing.

[0025] 2. This design, by setting up an X-shaped rotating rod and a telescopic rod, ensures that when one pallet is about to leave the picking channel, the pallet located in the heating chamber will enter the picking channel, and when the other pallet is about to leave the loading channel, the pallet located in the picking chamber will enter the loading channel. This avoids heat loss, saves time and energy. Furthermore, since the telescopic rod is slidably connected to the X-shaped rotating rod, and both the X-shaped rotating rod and the telescopic rod are in contact with the sealing plate, heat cannot be lost from the drive assembly, further preventing heat loss and saving time and energy.

[0026] 3. This design incorporates a pressure plate and a pressure block on the outer casing. When the handle on the retrieval door is rotated, the handle pushes the pressure plate, which in turn compresses the sealing plate to better fit with the X-shaped rotating rod and telescopic rod. The pressure plate also compresses the trays located in the retrieval channel and the loading channel, allowing the trays to better fit with the outer casing and the pressure plate. This ensures a better seal in the heating chamber during the carburizing process, preventing leakage of carburizing gas and thus reducing carburizing efficiency. Therefore, this design improves the sealing performance of the heating chamber and ensures the carburizing efficiency of the gears. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the carburizing and quenching heat treatment device for gear processing according to the present invention;

[0028] Figure 2 This is a schematic diagram of the opening of the part-removing door of the carburizing and quenching heat treatment device for gear processing of the present invention;

[0029] Figure 3 for Figure 2 A schematic diagram of the structure after the front and middle outer shells have been disassembled;

[0030] Figure 4 for Figure 1 Sectional view at point AA;

[0031] Figure 5 for Figure 4 Enlarged view at point B in the middle;

[0032] Figure 6 for Figure 4 Enlarged view at point C;

[0033] Figure 7 for Figure 1 Sectional view at point DD;

[0034] Figure 8 for Figure 7 Enlarged view of point E in the middle.

[0035] In the diagram: 1. Outer shell; 2. Heating mechanism; 3. Fan; 4. Retrieval door; 5. Heating chamber; 6. Retrieval chamber; 7. Retrieval channel; 8. Loading channel; 9. Drive assembly; 10. Tray; 11. Ventilation slot; 12. Motor; 13. Drive gear one; 15. Transmission gear one; 16. X-shaped rotating rod; 17. Telescopic rod; 18. Hinge rod; 19. Sliding groove; 20. Sealing plate; 21. Pressing block; 23. Pressing plate; 24. Handle; 25. Screw; 26. Sliding plate; 28. Lifting block; 29. ​​Rectangular slider; 30. Rectangular groove; 31. Rotating rod one; 32. Rotating rod two; 33. Connecting rod one; 34. Connecting rod two; 35. Gearless groove; 36. Isolation groove; 37. Support rod; 39. Drive gear two; 40. Transmission gear two. Detailed Implementation

[0036] This invention provides a carburizing and quenching heat treatment apparatus for gear machining, the technical solution of which is as follows:

[0037] Please see Figures 1 to 8 A carburizing and quenching heat treatment device for gear processing includes a housing 1, a heating mechanism 2, and a fan 3. The heating mechanism 2 is mounted on the housing 1 and uses components such as resistance wires in the prior art. The fan 3 is fixedly connected inside the housing 1. A part-retrieving door 4 is hinged to the housing 1, and a handle 24 is provided on the part-retrieving door 4. One end of the handle 24 is fixedly connected to a screw 25, and the other end of the screw 25 is threadedly connected to the housing 1. A heating chamber 5 and a part-retrieving chamber 6 are opened inside the housing 1, and a part-retrieving passage is opened on the housing 1. The loading channel 7 and the unloading channel 8 connect the heating chamber 5 and the unloading chamber 6. The fan 3 is installed inside the heating chamber 5. The outer shell 1 is equipped with a drive assembly 9. Multiple trays 10 are installed inside the outer shell 1. Each tray 10 has a ventilation slot 11. All trays 10 are connected to the drive assembly 9. All sides of the trays 10 are in contact with the inner walls of the heating chamber 5 and the unloading chamber 6. The drive assembly 9 is used to drive the trays 10 to move back and forth in the heating chamber 5 and the unloading chamber 6.

[0038] For further details, please refer to Figures 1 to 8 The drive assembly 9 includes a motor 12, which is fixedly connected to the housing 1. A drive gear 13 is fixedly connected to the output end of the motor 12. A connecting rod 33 is rotatably connected to the housing 1, and a transmission gear 15 is fixedly connected to the connecting rod 33. The drive gear 13 and the transmission gear 15 mesh. One end of the connecting rod 33 extends into the interior of the housing 1. An X-shaped rotating rod 16 is fixedly connected to the end of the connecting rod 33 inside the housing 1. Multiple telescopic rods 17 are slidably connected to the X-shaped rotating rod 16. A hinge rod 18 is fixedly connected to one end of the telescopic rod 17. A sliding groove 19 is also provided inside the housing 1. The hinge rod 18 is slidably connected inside the sliding groove 19. The tray 10 is hinged to the hinge rod 18. A sealing plate 20 is provided inside the housing 1. The sealing plate 20 is in contact with the surface of the X-shaped rotating rod 16 and the telescopic rod 17. The hinge rod 18 is in contact with the inner wall of the sliding groove 19 and the outer side of the sealing plate 20.

[0039] Please see Figures 1 to 8A clamping block 21 is slidably connected inside the outer casing 1. One end of the clamping block 21 is in contact with the sealing plate 20. A clamping plate 23 is slidably connected to the outer casing 1. The clamping plate 23 is in contact with the other end of the clamping block 21. The tray 10, the clamping block 21, and the clamping plate 23 are in contact. One end of the screw 25 extends into the outer casing 1 and contacts the clamping plate 23. A sliding plate 26 is provided on the clamping block 21. The sliding plate 26 is slidably connected to the clamping block 21. The sliding plate 26 is located on one side of the upper part channel 8 and is in contact with the upper part channel 8. The tray 10 contacts the sliding plate 26 and the clamping block 21, and a spring is provided between them. The sliding plate 26 is hinged to a lifting block 28 on one side of the heating chamber 5. A rectangular slider 29 is provided on one side of the tray 10. The rectangular slider 29 is fixedly connected to the tray 10 and extends into the sliding groove 19. Both sides of the rectangular slider 29 are in contact with the sides of the sliding groove 19. Rectangular grooves 30 are provided on the inner walls of the heating chamber 5 and the part removal chamber 6. One side of the rectangular slider 29 is in contact with the rectangular groove 30.

[0040] Please see Figures 1 to 8 The X-shaped rotating rod 16 includes a rotating rod 31 and a rotating rod 32. A connecting rod 34 is also rotatably connected to the outer casing. The rotating rods 31 and 32 are installed at intervals. The connecting rod 34 is coaxial with the connecting rod 33. The connecting rod 33 is fixedly connected to the rotating rod 31, and the connecting rod 34 is fixedly connected to the rotating rod 32. Both ends of the rotating rods 31 and 32 are slidably connected to the telescopic rod 17. A transmission gear 40 is fixedly connected to the connecting rod 34. A drive gear 39 is fixedly connected to the output end of the motor 12. The transmission gear 40 and the drive gear 39 mesh with each other. Both drive gear 13 and drive gear 2 39 are provided with toothless grooves 35, and drive gear 13 and drive gear 2 39 are installed in a staggered manner. Isolation grooves 36 are provided on the inner wall of the outer shell 1 and the picking door 4. The isolation grooves 36 on both sides are far away from the picking channel 7 and the loading channel 8. The distance between one side plane of the isolation groove 36 and the tray 10 is x, x = 1mm. Two support rods 37 are slidably connected in the isolation groove 36 on the inner wall of the heating chamber 5. A spring is provided between the support rod 37 and the inner wall of the isolation groove 36. The side of the support rod 37 near the picking chamber 6 is provided with a chamfer. The tray 10 is in contact with the side of the support rod 37 that is not provided with a chamfer.

[0041] Please see Figures 1 to 8When the worker needs to remove a gear from the carburizing and quenching heat treatment device for gear processing, the worker turns the handle 24 in the opening direction. At this time, after the screw 25 leaves the outer casing 1, the removal door 4 is opened. The worker can then place the next gear that needs heat treatment onto the tray 10 located in the removal chamber 6. After the gear is placed, the motor 12 is started. The motor 12 drives the two drive gears on the output end to rotate. At this time, one of the drive gears drives the transmission gear 15 and the connecting rod 33 to rotate, while the toothless groove 35 on the second drive gear 39 passes through the transmission gear 2. 40, and will not drive the transmission gear 40 to rotate, while the connecting rod 33 will drive the rotating rod 31 to rotate. At this time, the telescopic rods 17 on both sides of the rotating rod 31 will rotate with the rotating rod 31. The hinge rod 18 at one end of the telescopic rod 17 will drive the tray 10 to slide along the slide groove. When the tray 10 on the rotating rod 31 moves a certain distance and approaches the tray 10 on the rotating rod 32, the toothless groove 35 on the driving gear 39 will move away from the transmission gear 40. At this time, the driving gear 39 will drive the transmission gear 40 and the connecting rod 34 to rotate. At this time, the rotating rod 33 will rotate. 2. When the rotating rod 32 rotates, the tray 10 on the rotating rod 32 and the tray 10 on the rotating rod 31 move together. At this time, the tray 10 on the rotating rod 32 located in the picking channel 7 will move to the picking chamber 6, while the tray 10 on the rotating rod 31 located in the heating chamber 5 will enter the picking channel 7 and contact the pressing plate 23. At the same time, the tray 10 on the rotating rod 32 located in the loading channel 8 will move towards the interior of the heating chamber 5. During the movement, the tray 10 will contact the lifting block 28 on the sliding plate 26. At this time, the sliding plate 26 compresses the spring and moves with the tray 10. After a certain distance, the tray 10 presses against the lifting block 28, at which point the sliding plate 26 returns to its original position. The tray 10 continues to move and contacts the support rod 37, pressing against the chamfer on one side of the support rod 37 to reach the other side. Meanwhile, the rotating rod 31, located inside the picking chamber 6, moves the tray 10 into the loading channel 8 and contacts the pressing plate 23. At this point, the motor 12 stops, and the operator removes the gear from the tray 10 that has entered the picking chamber 6 from the picking channel 7. If it is necessary to insert or remove the gear, the above steps can be repeated by restarting the motor 12.

[0042] Please see Figures 1 to 8 When the staff closes the pickup door 4 and turns the handle 24 on the pickup door 4, the handle 24 will push the pressure plate 23 through the screw 25. At this time, the pressure plate 23 will squeeze the pressure block 21, and the pressure block 21 will in turn squeeze the sealing plate 20 to better fit with the X-shaped rotating rod 16 and the telescopic rod 17. The pressure plate 23 will also squeeze the tray 10 located in the pickup channel 7 and the loading channel 8. At this time, the tray 10 will also fit with the outer shell 1 and the pressure plate 23.

[0043] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A carburizing and quenching heat treatment device for gear processing, comprising a housing (1), a heating mechanism (2), and a fan (3), wherein the heating mechanism (2) is mounted on the housing (1), the fan (3) is fixedly connected inside the housing (1), a part-retrieving door (4) is hinged on the housing (1), a handle (24) is provided on the part-retrieving door (4), a screw (25) is fixedly connected to one end of the handle (24), and one end of the screw (25) is threadedly connected to the housing (1), characterized in that, The outer shell (1) has a heating chamber (5) and a picking chamber (6) inside. The outer shell (1) has a picking channel (7) and a loading channel (8) on it. The picking channel (7) and the loading channel (8) connect the heating chamber (5) and the picking chamber (6). The fan (3) is located inside the heating chamber (5). The outer shell (1) is equipped with a drive assembly (9). The outer shell (1) has multiple trays (10) inside it. The trays (10) have ventilation slots (11) on them. The multiple trays (10) are connected to the drive assembly (9). All sides of the trays (10) are in contact with the inner walls of the heating chamber (5) and the picking chamber (6). The drive assembly (9) is used to drive the trays (10) to move back and forth in the heating chamber (5) and the picking chamber (6).

2. The carburizing and quenching heat treatment apparatus for gear machining according to claim 1, characterized in that, The drive assembly (9) includes a motor (12), which is fixedly connected to the housing (1). A drive gear (13) is fixedly connected to the output end of the motor (12). A connecting rod (33) is also rotatably connected to the housing (1). A transmission gear (15) is fixedly connected to the connecting rod (33). The drive gear (13) and the transmission gear (15) mesh. One end of the connecting rod (33) extends into the housing (1). An X-shaped rotating rod (16) is fixedly connected to the end of the connecting rod (33) inside the housing (1). Multiple telescopic rods (17) are slidably connected to the X-shaped rotating rod (16). One end of the telescopic rod (17) is fixedly connected to a hinge rod (18). A sliding groove (19) is also provided inside the outer shell (1). The hinge rod (18) is slidably connected inside the sliding groove (19). The tray (10) is hinged to the hinge rod (18). A sealing plate (20) is provided inside the outer shell (1). The sealing plate (20) is in contact with the surface of the X-shaped rotating rod (16) and the telescopic rod (17). The hinge rod (18) is in contact with the inner wall of the sliding groove (19) and the outer side of the sealing plate (20).

3. The carburizing and quenching heat treatment apparatus for gear machining according to claim 2, characterized in that, The X-shaped rotating rod (16) includes a rotating rod one (31) and a rotating rod two (32), which are installed at intervals. A connecting rod two (34) is also rotatably connected to the outer shell. The connecting rod two (34) is coaxially arranged with the connecting rod one (33). The connecting rod one (33) is fixedly connected to the rotating rod one (31), and the connecting rod two (34) is fixedly connected to the rotating rod two (32). The rotating rod one (31) and the rotating rod two (32) are also rotatably connected. Both ends of the second rod (32) are slidably connected to the telescopic rod (17). A transmission gear (40) is fixedly connected to the second connecting rod (34). A drive gear (39) is also fixedly connected to the output end of the motor (12). The transmission gear (40) and the drive gear (39) mesh with each other. Both the first drive gear (13) and the second drive gear (39) are provided with toothless grooves (35), and the first drive gear (13) and the second drive gear (39) are installed in a staggered manner.

4. The carburizing and quenching heat treatment apparatus for gear machining according to claim 3, characterized in that, A clamping block (21) is slidably connected inside the outer shell (1). One end of the clamping block (21) is in contact with the sealing plate (20). A clamping plate (23) is slidably connected on the outer shell (1). The clamping plate (23) is in contact with the other end of the clamping block (21). The tray (10), the clamping block (21), and the clamping plate (23) are in contact. One end of the screw (25) extends into the inner shell (1) and contacts the clamping plate (23).

5. The carburizing and quenching heat treatment apparatus for gear machining according to claim 2, characterized in that, A rectangular slider (29) is provided on one side of the tray (10). The rectangular slider (29) is fixedly connected to the tray (10). The rectangular slider (29) extends into the sliding groove (19), and the two sides of the rectangular slider (29) are in contact with the sides of the sliding groove (19). A rectangular groove (30) is provided on the inner wall of both the heating chamber (5) and the taking chamber (6). One side of the rectangular slider (29) is in contact with the rectangular groove (30).

6. The carburizing and quenching heat treatment apparatus for gear machining according to claim 4, characterized in that, A sliding plate (26) is provided on the clamping block (21). The sliding plate (26) is slidably connected to the clamping block (21). The sliding plate (26) is located on one side of the upper part channel (8) and in contact with the tray (10). A spring is provided between the sliding plate (26) and the clamping block (21). Two lifting blocks (28) are hinged on the side of the sliding plate (26) located in the heating chamber (5). A torsion spring is provided at the hinge point between the lifting block (28) and the sliding plate (26).

7. The carburizing and quenching heat treatment apparatus for gear machining according to claim 6, characterized in that, Isolation grooves (36) are provided on the inner wall of the outer shell (1) and the picking door (4). The isolation grooves (36) on both sides are far away from the picking channel (7) and the loading channel (8). The distance between one side plane of the isolation groove (36) and the tray (10) is x, where x ≧ 1 mm.

8. The carburizing and quenching heat treatment apparatus for gear machining according to claim 2, characterized in that, Two support rods (37) are slidably connected in the isolation groove (36) on the inner wall of the heating chamber (5). A spring is provided between the support rod (37) and the inner wall of the isolation groove (36). The support rod (37) has a chamfer on the side near the take-up chamber (6). The tray (10) contacts the side of the support rod (37) without the chamfer.

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