CN219793082U

CN219793082U - Heat treatment equipment for carburized gear

Info

Publication number: CN219793082U
Application number: CN202321192779.2U
Authority: CN
Inventors: 韩建忠
Original assignee: Jiangyin Ruixin Forging Co ltd
Current assignee: Jiangyin Ruixin Forging Co ltd
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-10-03
Anticipated expiration: 2033-05-17

Abstract

The utility model discloses heat treatment equipment for carburized gears, and relates to the technical field of gear machining, comprising a carburizing furnace, a carburizing processing unit and a charging and feeding unit; a carbon storage box is arranged at the bottom end inside the carburizing furnace; the carburizing processing unit is arranged at the left side of the inside and the outside of the carburizing furnace; the charging and feeding unit comprises a vertical chute, a hydraulic cylinder, a sliding mounting block, a gear mounting frame and a horizontal chute, wherein the vertical chute is formed in the middle position of the left side and the right side of the carbon storage box, and the vertical chute is of a T-shaped structure. The utility model is convenient for the loading and the placing of the gear, can drive the gear workpiece to be immersed in the carbon material, and can stir the surrounding carbon material to cause the heating to be more uniform under the drive of the motor, thereby obtaining better carburization effect, forming a vacuum environment in a carburizing furnace, and enabling the carbon material to be rapidly decomposed into active carbon substances under the action of a gas permeation agent so as to improve the reaction efficiency of the carburization processing of the gear.

Description

Heat treatment equipment for carburized gear

Technical Field

The utility model relates to the technical field of gear machining, in particular to heat treatment equipment for carburized gears.

Background

Gears are important parts for transmitting power, changing direction or speed. In the production process of the gear, the gear workpiece is subjected to heat treatment so as to obtain better anti-fatigue and wear-resisting performance, and a carburizing furnace is commonly used for improving the processing efficiency of the heat treatment of the gear when the gear is subjected to heat processing;

the utility model provides a carburizing furnace for gear thermal treatment that is published in prior art to grant bulletin number CN218812019U, includes shell, interior stove and bell, interior stove sets up the inside at the shell, the bell sets up the top at the shell, still be provided with the heater strip between interior stove and the shell, the feed opening of falling round platform shape has been seted up on the bell, the inside grafting of feed opening has the sealing plug rather than the looks adaptation, it is provided with the air duct to run through on the sealing plug, the inside rotation of sealing plug is connected with the rotating member, the side detachable of rotating member being close to interior stove is connected with the rack. According to the utility model, the motor is used for driving the rotary member to rotate, the rotary member drives the placing frame to rotate, and the rotary member is made of a heat insulation material, so that high temperature in the inner furnace is prevented from being transmitted to the outside, the driving motor can work normally, and carburization gas introduced into the inner furnace can be uniformly dispersed by the continuously rotating placing frame;

although the device has a design in the aspect of blanking, when the loading operation of the gear workpiece is not convenient enough, and the state of the gear workpiece in the device is fixed, the gear workpiece cannot be uniformly contacted with carbon materials, so that the surface of the gear is heated unevenly, and the carburization effect is poor.

Disclosure of Invention

The utility model aims to overcome the prior art, provides the heat treatment equipment for the carburized gear, is convenient for loading and unloading the gear, can drive a gear workpiece to be immersed in carbon materials, can stir surrounding carbon materials to enable the carbon materials to be heated more uniformly under the drive of a motor, thereby obtaining better carburization effect, can form a vacuum environment in a carburizing furnace, can enable the carbon materials to be decomposed into active carbon substances more rapidly under the action of a gas carburizing agent, so as to improve the reaction efficiency of gear carburization processing, and can effectively solve the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the heat treatment equipment of the carburized gear comprises a carburizing furnace, a carburizing processing unit and a charging and feeding unit;

carburizing furnace: a square box body is provided with a carbon storage box at the bottom end inside;

carburizing processing unit: is arranged at the left side of the inside and the outside of the carburizing furnace;

charging and feeding unit: the automatic carbon storage device comprises a vertical sliding groove, a hydraulic cylinder, a connecting column, a supporting plate, a sliding mounting block, a fixed connecting rod, gear mounting frames and a horizontal sliding groove, wherein the vertical sliding groove is formed in the middle position of the left side and the right side of the carbon storage box, the vertical sliding groove is of a T-shaped structure, the hydraulic cylinder is embedded in the bottom of the vertical sliding groove, the telescopic end of the hydraulic cylinder is arranged upwards and fixedly connected with the lower end of the connecting column, the upper end of the connecting column is fixedly connected with the lower end of the supporting plate, the supporting plate is in sliding connection with the vertical sliding groove, the sliding mounting block is fixedly connected with the upper side of the supporting plate, the sliding mounting block is fixedly connected with the front side and the rear side of the supporting plate, the fixed connecting rod penetrates through the vertical sliding groove and is fixedly connected with the outer side of the gear mounting frames arranged in the middle of the carbon storage box, the gear mounting frames are transversely uniformly arranged in three, the horizontal sliding groove is formed in the front of the upper end of the carbon storage box, the horizontal sliding groove is vertically communicated with the upper end of the vertical sliding groove, and the input end of the hydraulic cylinder is electrically connected with the output end of an external power supply through an external control switch group.

The carburizing furnace is used for providing the internal environment for carrying out carburizing processing on the gear, the carbon storage box is used for storing carbon materials which are needed to be used for carburizing processing on the gear, the carburizing processing unit is used for carrying out carburizing processing on the gear, the vertical sliding chute is used for sliding connection of the sliding installation block, the bearing plate is used for bearing the sliding installation block, the hydraulic cylinder drives the bearing plate to lift through the connecting column, the fixed connecting rod is used for fixing connection between the gear installation frame and the sliding installation block, the gear installation frame is used for installing the gear workpiece to be processed, the horizontal sliding chute is used for longitudinally sliding of the sliding installation block, so that the sliding installation block can drive the gear installation frame to slide to the front side of the carburizing furnace, the gear workpiece is conveniently placed, after gear placement is completed, the sliding installation block continues to move to the middle part of the carburizing furnace, and the gear installation frame is immersed into the carbon storage box with the gear workpiece under the action of the hydraulic cylinder so as to carry out subsequent carburizing processing operation.

Further, the charging and feeding unit further comprises a motor, a transmission shaft, a shrinkage clamping cap, a clamping block, a spring and an inserting block; the inside of slidable mounting piece inlays and establishes the installation motor, the output shaft of motor towards the device middle part and with the one end fixed connection of transmission shaft, the transmission shaft transversely sets up and its other end put into circumference side circumference fixedly connected with four inserts, shrink joint cap passes from the inboard of gear installation frame and slides the tip of pegging graft at the transmission shaft, the insert can relative slip in the joint with shrink joint cap, shrink joint cap stretches into the inside one section cover of gear installation frame and has the spring, and the center department fixedly connected with insert at the circular head of shrink joint cap, the input of motor is connected with external power source's output electricity through outside control switch group. The joint piece is used for carrying out the joint to shrink joint cap, and two shrink joint caps in the gear installation frame can be separated each other to the installation is waited the gear of processing, and the inserted block inserts the hole of gear, and the spring makes shrink joint cap can the centre gripping fix in the gear both sides, realizes the fixed to the gear work piece, and the motor is used for driving the transmission shaft and rotates, and then makes the gear work piece that soaks in the carbon material can rotate, thereby stirs the carbon material on every side and makes to be heated more evenly, in order to realize better carburization effect.

Further, the carburizing processing unit comprises mounting seats and electric heating rods, three mounting seats are transversely and fixedly connected to the inner walls of the front side and the rear side of the carbon storage box, one electric heating rod is mounted at the end of each mounting seat, the electric heating rods longitudinally extend to the middle of the device, and the input ends of the electric heating rods are electrically connected with the output ends of an external power supply through an external control switch group. The mount pad is used for the installation of electric heat stick, and the electric heat stick is used for heating the carbon material to improve carburization processing's efficiency.

Further, the carburizing processing unit further comprises an air inlet pipe orifice, an electromagnetic opening and closing valve and a vacuum pump, wherein the air inlet pipe orifice is fixedly connected to the middle position of the upper end of the left side of the carburizing furnace, the electromagnetic opening and closing valve is installed in the middle of the air inlet pipe orifice, the vacuum pump is installed at the rear side of the upper end of the left side of the carburizing furnace, the air inlet end of the vacuum pump is communicated with the inside of the carburizing furnace, and the input ends of the electromagnetic opening and closing valve and the vacuum pump are electrically connected with the output end of an external power supply through an external control switch group. The vacuum pump can pump and exhaust air in the carburizing furnace, so that a vacuum environment is formed, the carbon content is accurately controlled, a carburized product has better carburized layer uniformity and surface quality, and the air inlet pipe orifice is used for introducing a gas infiltrant into the carburizing furnace, so that carbon materials can be rapidly decomposed into active carbon atoms, and carburization processing is carried out on gear workpieces.

Further, the carburizing furnace further comprises a movable shaft and a glass door, wherein the front end of the carburizing furnace is movably connected with a vertical movable shaft, and the right side of the movable shaft is fixedly connected with the glass door. The movable shaft enables the glass door to move so as to open the glass door for gear loading and unloading operation, and the glass door can conveniently observe the gear carburizing processing degree.

Further, the sealing strip and the clamping lock are further included, the sealing strip is fixedly connected to the edge of the glass door adjacent to the front end opening of the carburizing furnace, and the clamping lock is fixedly installed at the middle position of the right front end of the carburizing furnace. The sealing strip is used for sealing a gap between the glass door and the carburizing furnace, so that tightness of the carburizing furnace is ensured, and the clamping lock is used for locking the glass door.

Compared with the prior art, the utility model has the beneficial effects that: the heat treatment equipment of the carburized gear has the following advantages:

1. the automatic carburizing device has the advantages that the automatic carburizing device is reliable in charging and feeding unit, facilitates the loading of gears, can drive gear workpieces to be immersed into carbon materials, and can stir the surrounding carbon materials to be heated more uniformly under the driving of the motor, so that a better carburizing effect is achieved: the horizontal sliding chute is used for longitudinally sliding the sliding installation block, so that the sliding installation block can drive the gear installation frame to slide to the front side of the carburizing furnace, gear workpieces are conveniently placed, after gear placement is completed, the sliding installation block continues to move to the middle part of the carburizing furnace, and the gear installation frame is immersed into the carbon storage box with the gear workpieces under the action of the hydraulic cylinder so as to carry out subsequent carburizing processing operation; the two shrinkage clamping caps can be separated from each other so as to mount a gear to be processed, the insert block is inserted into an inner hole of the gear, the shrinkage clamping caps can be clamped and fixed on two sides of the gear by the springs, the gear workpiece is fixed, the motor is used for driving the transmission shaft to rotate, and then the gear workpiece immersed in carbon material can rotate, so that surrounding carbon material is stirred to enable the heating to be more uniform, and a better carburizing effect is achieved;

2. the device has a reliable carburizing processing unit, can form a vacuum environment in a carburizing furnace, and can enable carbon materials to decompose active carbon substances more rapidly under the action of a gas permeability agent so as to improve the reaction efficiency of gear carburizing processing: the mounting seat is used for mounting the electric heating rod, the electric heating rod is used for heating carbon materials, so that the carburizing processing efficiency is improved, the vacuum pump can pump and exhaust air in the carburizing furnace, so that a vacuum environment is formed, the carbon content is accurately controlled, a carburized product has better carburized layer uniformity and surface quality, and the air inlet pipe orifice is used for introducing a gas infiltrant into the carburizing furnace, so that the carbon materials can be rapidly decomposed into active carbon atoms, and the gear workpiece is carburized;

3. the utility model is convenient for the loading and the placing of the gear, can drive the gear workpiece to be immersed in the carbon material, and can stir the surrounding carbon material to cause the heating to be more uniform under the drive of the motor, thereby obtaining better carburization effect, forming a vacuum environment in a carburizing furnace, and enabling the carbon material to be rapidly decomposed into active carbon substances under the action of a gas permeation agent so as to improve the reaction efficiency of the carburization processing of the gear.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the inner inclined upper side of the present utility model;

FIG. 3 is a schematic view of the structure of the present utility model shown in FIG. 2 at a partially enlarged scale;

FIG. 4 is a schematic view of the structure of the inner right upper side of the present utility model;

fig. 5 is a schematic view of a partial enlarged structure at B in fig. 4 according to the present utility model.

In the figure: 1 carburizing furnace, 2 carbon storage box, 3 carburizing processing unit, 31 mount pad, 32 electric bar, 33 inlet pipe mouth, 34 electromagnetic opening and closing valve, 35 vacuum pump, 4 feeding unit, 41 vertical chute, 42 hydraulic cylinder, 43 connecting column, 44 bearing board, 45 sliding mounting block, 46 fixed connection rod, 47 gear mounting frame, 48 horizontal chute, 49 motor, 410 transmission shaft, 411 shrink clamping cap, 412 clamping block, 413 spring, 414 insert block, 5 loose axle, 6 glass door, 7 sealing strip, 8 clamping lock.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present embodiment provides a technical solution: the heat treatment equipment of the carburized gear comprises a carburizing furnace 1, a carburizing processing unit 3 and a charging and feeding unit 4;

carburizing furnace 1: a square box body is provided with a carbon storage box 2 at the bottom end inside;

carburizing processing unit 3: is arranged at the left side of the inside and the outside of the carburizing furnace 1;

charging and feeding unit 4: the vertical sliding chute 41 is formed in the middle position of the left side and the right side of the carbon storage box 2, the vertical sliding chute 41 is of a T-shaped structure, the hydraulic cylinder 42 is embedded and installed at the bottom of the vertical sliding chute 41, the telescopic end of the hydraulic cylinder 42 is upwards arranged and fixedly connected with the lower end of the connecting column 43, the upper end of the connecting column 43 is fixedly connected to the lower end of the supporting plate 44, the supporting plate 44 is in sliding connection with the vertical sliding chute 41, the sliding mounting block 45 is fixedly connected to the upper side of the vertical sliding chute 41, the front side and the rear side of the sliding mounting block 45, which faces towards the middle of the device, are fixedly connected with the front side and the rear side of the fixed connecting rod 46, the fixed connecting rod 46 penetrates through the vertical sliding chute 41 and is fixedly connected with the outer side of the gear mounting frame 47 arranged in the middle of the carbon storage box 2, the gear mounting frame 47 is transversely uniformly provided with three, the horizontal sliding chute 48 is formed in the front of the upper end of the carbon storage box 2 and is vertically communicated with the upper end of the vertical sliding chute 41 through the fixed connecting rod 46, and the output end of the hydraulic cylinder 42 is electrically connected with the output end of an external power supply set through an external control switch.

The carburizing furnace 1 is used for providing an internal environment for carrying out carburizing processing on gears, the carbon storage box 2 is used for storing carbon materials which are needed by carburizing, the carburizing processing unit 3 is used for carrying out carburizing processing on the gears, the vertical sliding chute 41 is used for sliding connection of the sliding mounting block 45, the supporting plate 44 is used for supporting the sliding mounting block 45, the hydraulic cylinder 42 drives the supporting plate 44 to lift through the connecting column 43, the fixed connecting rod 46 is used for fixedly connecting the gear mounting frame 47 and the sliding mounting block 45, the gear mounting frame 47 is used for mounting gear workpieces to be processed, the horizontal sliding chute 48 is used for longitudinally sliding the sliding mounting block 45, so that the sliding mounting block 45 can drive the gear mounting frame 47 to slide to the front side of the carburizing furnace 1, the gear workpieces are conveniently put in, after gear putting is finished, the sliding mounting block 45 is continuously moved to the middle part of the carburizing furnace 1, and the gear mounting frame 47 is immersed into the carbon storage box 2 with the gear workpieces under the action of the hydraulic cylinder 42 so as to carry out subsequent carburizing processing operations.

The charging and feeding unit 4 further comprises a motor 49, a transmission shaft 410, a shrinkage clamping cap 411, a clamping block 412, a spring 413 and an insertion block 414; the inside of the sliding mounting block 45 is embedded with a motor 49, an output shaft of the motor 49 faces the middle of the device and is fixedly connected with one end of a transmission shaft 410, the transmission shaft 410 is transversely arranged, the other end of the transmission shaft 410 is fixedly connected with four inserting blocks 414 in a circumferential mode, a shrinkage clamping cap 411 penetrates through the inner side of a gear mounting frame 47 and is slidably inserted into the end portion of the transmission shaft 410, the inserting blocks 414 and the shrinkage clamping cap 411 can slide relatively while being clamped, a section of the shrinkage clamping cap 411 extending into the gear mounting frame 47 is sleeved with a spring 413, an inserting block 414 is fixedly connected to the center of a round head of the shrinkage clamping cap 411, and the input end of the motor 49 is electrically connected with the output end of an external power supply through an external control switch group. The clamping block 412 is used for clamping the shrinkage clamping caps 411, the two shrinkage clamping caps 411 in the gear mounting frame 47 can be separated from each other so as to mount a gear to be processed, the inserting block 414 is inserted into an inner hole of the gear, the springs 413 enable the shrinkage clamping caps 411 to be clamped and fixed on two sides of the gear, the fixing of gear workpieces is achieved, the motor 49 is used for driving the transmission shaft 410 to rotate, further the gear workpieces immersed in carbon materials can rotate, and accordingly surrounding carbon materials are stirred to be heated more uniformly, and a better carburizing effect is achieved.

The carburizing processing unit 3 comprises a mounting seat 31 and an electric heating rod 32, three mounting seats 31 are transversely and fixedly connected to the inner walls of the front side and the rear side of the carbon storage box 2, the electric heating rod 32 is mounted at the end part of each mounting seat 31, the electric heating rod 32 longitudinally extends to the middle of the device, and the input end of the electric heating rod 32 is electrically connected with the output end of an external power supply through an external control switch group. The mounting seat 31 is used for mounting the electric heating rod 32, and the electric heating rod 32 is used for heating the carbon material, so that the carburizing processing efficiency is improved.

The carburizing processing unit 3 further comprises an air inlet pipe orifice 33, an electromagnetic opening and closing valve 34 and a vacuum pump 35, the air inlet pipe orifice 33 is fixedly connected to the middle position of the upper end of the left side of the carburizing furnace 1, the electromagnetic opening and closing valve 34 is installed in the middle of the air inlet pipe orifice 33, the vacuum pump 35 is installed on the rear side of the upper end of the left side of the carburizing furnace 1, the air inlet end of the vacuum pump 35 is communicated with the inside of the carburizing furnace 1, and the input ends of the electromagnetic opening and closing valve 34 and the vacuum pump 35 are electrically connected with the output end of an external power supply through an external control switch group. The vacuum pump 35 can pump air in the carburizing furnace 1 to form a vacuum environment so as to accurately control the carbon content, so that a carburized product has better carburized layer uniformity and surface quality, and the air inlet pipe orifice 33 is used for introducing a gas infiltrant into the carburizing furnace 1, so that the carbon material can be rapidly decomposed into activated carbon atoms, and carburization processing is performed on a gear workpiece.

The carburizing furnace further comprises a movable shaft 5 and a glass door 6, wherein the front end of the carburizing furnace 1 is movably connected with the vertical movable shaft 5, and the right side of the movable shaft 5 is fixedly connected with the glass door 6. The movable shaft 5 enables the glass door 6 to be movable to open the glass door 6 for gear loading operation, and the glass door 6 can conveniently observe the progress degree of gear carburization processing.

The sealing strip 7 and the clamping lock 8 are also included, the sealing strip 7 is fixedly connected to the edge of the glass door 6 adjacent to the front end opening of the carburizing furnace 1, and the clamping lock 8 is fixedly arranged at the middle position of the right front end of the carburizing furnace 1. The sealing strip 7 is used for sealing a gap between the glass door 6 and the carburizing furnace 1 so as to ensure the tightness of the carburizing furnace 1, and the clamping lock 8 is used for locking the glass door 6.

The working principle of the heat treatment equipment for the carburized gear provided by the utility model is as follows: when the device is used, the glass door 6 on the front side is firstly opened, the gear mounting frame 47 is moved to the front side of the carburizing furnace 1 through the sliding mounting block 45, then the two shrinkage clamping caps 411 in the gear mounting frame 47 can be separated from each other so as to mount a gear to be processed, and the springs 413 enable the shrinkage clamping caps 411 to be clamped and fixed on two sides of the gear, so that the gear workpiece is fixed. After the gear is mounted, the sliding mounting block 45 drives the gear mounting frame 47 and the gear workpiece to move to the middle side of the device, and then the gear workpiece is immersed into the carbon material in the carbon storage box 2 downwards. The electric heating rod 32 is used for heating the carbon material, so that the carburizing processing efficiency is improved, the vacuum pump 35 can pump and exhaust air in the carburizing furnace 1, so that a vacuum environment is formed, the carbon content is accurately controlled, a carburized product has better carburized layer uniformity and surface quality, the air inlet pipe orifice 33 is used for introducing a gas infiltrant into the carburizing furnace 1, so that the carbon material can be rapidly decomposed into active carbon atoms, and the gear workpiece is carburized; the motor 49 is used to drive the transmission shaft 410 to rotate, so that the gear workpiece immersed in the carbon material can rotate, and the surrounding carbon material is stirred to be heated more uniformly, so that a better carburization effect is achieved. The movable shaft 5 enables the glass door 6 to move so as to open the glass door 6 for gear loading operation, the glass door 6 can conveniently observe the gear carburizing processing degree, the sealing strip 7 is used for sealing a gap between the glass door 6 and the carburizing furnace 1, the tightness of the carburizing furnace 1 is ensured, and the clamping lock 8 is used for locking the glass door 6.

It is noted that the control switch group disclosed in the above embodiment controls the operation of the hydraulic cylinder 42, the motor 49, the electric heating rod 32, the electromagnetic opening and closing valve 34, and the vacuum pump 35 by a method commonly used in the art.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. The heat treatment equipment of carburized gear is characterized in that: comprises a carburizing furnace (1), a carburizing processing unit (3) and a charging and feeding unit (4);

carburizing furnace (1): a square box body is provided with a carbon storage box (2) at the bottom end inside;

carburizing process unit (3): is arranged at the left side of the inside and the outside of the carburizing furnace (1);

charging and feeding unit (4): the vertical sliding chute (41) is arranged at the middle position of the left side and the right side of the carbon storage box (2), the vertical sliding chute (41) is of a T-shaped structure, the hydraulic cylinder (42) is embedded at the bottom of the vertical sliding chute (41), the telescopic end of the hydraulic cylinder (42) is upwards arranged and fixedly connected with the lower end of the connecting column (43), the upper end of the connecting column (43) is fixedly connected with the lower end of the supporting plate (44), the supporting plate (44) is in sliding connection with the vertical sliding chute (41), the sliding mounting block (45) is fixedly connected with the upper side of the supporting plate, one side of the sliding mounting block (45) facing the middle of the device is fixedly connected with the front and the rear two fixed connecting rods (46), the fixed connecting rods (46) penetrate through the vertical sliding chute (41) and are fixedly connected with the outer sides of the gear mounting frames (47) arranged at the middle of the carbon storage box (2), the gear mounting frames (47) are uniformly arranged at the front ends of the two side of the carbon storage box (46), the front ends of the two fixed connecting rods (48) are uniformly arranged between the two carbon storage boxes (47), the horizontal chute (48) is vertically communicated with the upper end of the vertical chute (41), and the input end of the hydraulic cylinder (42) is electrically connected with the output end of an external power supply through an external control switch group.

2. The heat treatment apparatus for a carburized gear according to claim 1, wherein: the charging and feeding unit (4) further comprises a motor (49), a transmission shaft (410), a shrinkage clamping cap (411), a clamping block (412), a spring (413) and an inserting block (414); the inside of slidable mounting piece (45) is inlayed and is installed motor (49), the output shaft of motor (49) towards the device middle part and with the one end fixed connection of transmission shaft (410), transmission shaft (410) transversely sets up and its other end put into circumference side circumference fixedly connected with four inserts (414), shrink joint cap (411) pass from the inboard of gear mounting frame (47) and slip grafting in the tip of transmission shaft (410), insert (414) and shrink joint cap (411) can relative slip when the joint, one section cover that shrink joint cap (411) stretched into inside gear mounting frame (47) has spring (413), and the center department fixedly connected with insert (414) at the circular head of shrink joint cap (411), the input of motor (49) is connected with external power source's output electricity through outside control switch group.

3. The heat treatment apparatus for a carburized gear according to claim 1, wherein: the carburizing processing unit (3) comprises mounting seats (31) and electric heating rods (32), three mounting seats (31) are transversely fixedly connected to the inner walls of the front side and the rear side of the carbon storage box (2), one electric heating rod (32) is mounted at the end of each mounting seat (31), the electric heating rods (32) longitudinally extend to the middle of the device, and the input ends of the electric heating rods (32) are electrically connected with the output ends of an external power supply through an external control switch group.

4. A heat treatment apparatus for carburized gears according to claim 3, wherein: the carburizing processing unit (3) further comprises an air inlet pipe orifice (33), an electromagnetic opening and closing valve (34) and a vacuum pump (35), the air inlet pipe orifice (33) is fixedly connected to the middle position of the upper end of the left side of the carburizing furnace (1), the electromagnetic opening and closing valve (34) is installed in the middle section of the air inlet pipe orifice (33), the vacuum pump (35) is installed on the rear side of the upper end of the left side of the carburizing furnace (1), the air inlet end of the vacuum pump (35) is communicated with the inside of the carburizing furnace (1), and the input ends of the electromagnetic opening and closing valve (34) and the vacuum pump (35) are electrically connected with the output end of an external power supply through an external control switch group.

5. The heat treatment apparatus for a carburized gear according to claim 1, wherein: still include loose axle (5) and glass door (6), the front end swing joint of carburizing furnace (1) has vertical loose axle (5), the right side fixedly connected with glass door (6) of loose axle (5).

6. The heat treatment apparatus for a carburized gear according to claim 5, wherein: the sealing device is characterized by further comprising a sealing strip (7) and a clamping lock (8), wherein the sealing strip (7) is fixedly connected to the edge of the glass door (6) adjacent to the front end opening of the carburizing furnace (1), and the clamping lock (8) is fixedly arranged at the middle position of the right front end of the carburizing furnace (1).