A heat treatment device for a half-shaft sleeve

Abstract

This utility model discloses a heat treatment device for a half-shaft sleeve, belonging to the technical field of half-shaft sleeves. This heat treatment device for a half-shaft sleeve includes a quenching mechanism, a circulation mechanism, and a heating mechanism. The quenching mechanism includes a quenching box with several through slots at its bottom. A pipe rack is fixedly installed inside the quenching box, a spray ring is fixedly installed on one side of the upper end of the pipe rack, and a pump is fixedly installed at the bottom end of the pipe rack. The circulation mechanism includes a box body with a circulating water tank slidably installed inside. A filter screen is snapped onto the upper end of the circulating water tank, and a heat-conducting plate is embedded at the bottom end of the circulating water tank. The heating mechanism includes a high-frequency induction heater and a spiral induction coil. The high-frequency induction heater is located on one side of the quenching box, and both ends of the spiral induction coil are respectively inserted into the upper end of the quenching box. This utility model can effectively improve the practicality of the heat treatment device for half-shaft sleeves and has high practical value.

Description

Technical Field

[0001] This utility model relates to the field of axle sleeve technology, specifically to a heat treatment device for axle sleeve. Background Technology

[0002] As a key component of the automotive transmission system, the heat treatment quality of the axle bushing directly affects the vehicle's driving safety and reliability.

[0003] Based on the above, the inventors have discovered the following problems: Currently, after quenching, the half-shaft sleeves are generally cooled by direct water spraying. The cooling water is discharged directly after one use and cannot be recycled. In continuous production scenarios, the half-shaft sleeve heat treatment equipment consumes a huge amount of water. Furthermore, the directly discharged cooling water has a high temperature due to absorbing residual heat from quenching; if it is discharged directly into the municipal pipe network without treatment, it can easily cause thermal pollution.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a heat treatment device for a half-shaft sleeve in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of this invention is to provide a heat treatment device for axle sleeves, in order to solve the problem mentioned in the background art that the existing axle sleeves are generally cooled by direct spraying water after quenching, and the cooling water is discharged directly after one use and cannot be recycled.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] A heat treatment device for a half-shaft sleeve includes a quenching mechanism, a circulation mechanism, and a heating mechanism. The quenching mechanism includes a quenching box with several through slots at its bottom. A pipe rack is fixedly installed inside the quenching box, a spray ring is fixedly installed on one side of the upper end of the pipe rack, and a pump is fixedly installed at the bottom end of the pipe rack. The circulation mechanism includes a box body with a circulating water tank slidably installed inside. A filter screen is snapped onto the upper end of the circulating water tank, and a heat-conducting plate is embedded at the bottom end of the circulating water tank. The heating mechanism includes a high-frequency induction heater and a spiral induction coil. The high-frequency induction heater is located on one side of the quenching box, and the two ends of the spiral induction coil are respectively inserted into the upper end of the quenching box. The two ends of the spiral induction coil are electrically connected to the output end of the high-frequency induction heater through wires.

[0008] Furthermore, a reserved groove is provided on one side of the upper end of the filter screen, a temperature sensor is embedded in the inner wall of the circulating water tank, a flexible hose is sleeved on the output end of the pump, the bottom end of the flexible hose extends through the reserved groove into the interior of the circulating water tank, and the output end of the pump is connected to the bottom end of the pipe rack.

[0009] The beneficial effects of adopting the above-mentioned further solutions are that the filter screen filters out impurities in the quenching fluid, preventing clogging of the spray ring or contamination of the half-shaft sleeve; the temperature sensor monitors the temperature of the quenching fluid in the circulating water tank in real time, providing data support for the refrigeration system; and the hose connects the pump and the circulating water tank through the reserved groove, ensuring unobstructed circulation path of the quenching fluid and improving circulation efficiency.

[0010] Furthermore, the bottom of the circulating water tank is provided with a cavity, the bottom of the heat-conducting plate extends into the cavity and is fixedly installed with an evaporator, a condenser is inserted into one side of the cavity, and a compressor, a dryer filter and an expansion valve are respectively installed at the bottom of the cavity.

[0011] The beneficial effect of adopting the above-mentioned further scheme is that the evaporator, condenser and compressor form a refrigeration system, which reduces the temperature of the quenching liquid through the principle of phase change: the compressor compresses the refrigerant into a high temperature and high pressure gas, which is liquefied by the condenser and then becomes a low temperature and low pressure liquid after passing through the dryer filter and expansion valve. It absorbs heat and vaporizes in the evaporator, absorbing the heat of the quenching liquid, thereby achieving efficient cooling of the quenching liquid and ensuring the temperature requirements of the quenching process.

[0012] Furthermore, the output end of the compressor is connected to the input end of the condenser via a pipe, the output end of the condenser is connected to the input end of the dryer filter via a pipe, the output end of the dryer filter is connected to one end of the expansion valve via a pipe, the other end of the expansion valve is connected to the input end of the evaporator via a pipe, and the output end of the evaporator is connected to the input end of the compressor via a pipe.

[0013] The beneficial effects of adopting the above-mentioned further solutions are that the components of the refrigeration system are connected by pipes to form a complete loop, ensuring the refrigerant circulation and achieving continuous refrigeration; the dryer filter removes moisture and impurities from the refrigerant, preventing blockage or corrosion of the refrigeration system; the expansion valve controls the refrigerant flow rate, ensuring the refrigeration efficiency of the evaporator, stabilizing the temperature of the quenching liquid within a suitable range, and improving the consistency of the heat treatment effect.

[0014] Furthermore, a ventilation grille is provided at the bottom of the housing on one side of the condenser, and a door is hinged to the other side of the housing via a pair of hinges.

[0015] The beneficial effects of adopting the above-mentioned further solutions are that the ventilation grille provides an air circulation channel for condenser heat dissipation, preventing the refrigeration system from being affected by poor heat dissipation; the door makes it easy to open the circulating water tank for maintenance operations such as filter replacement and quenching fluid addition, thus improving the maintainability of the device.

[0016] Furthermore, a pair of sliding rods are fixedly installed on one side of the interior of the quenching box, and a screw is rotatably connected between the pair of sliding rods inside the quenching box. A movable frame is threaded onto the screw, and both ends of the movable frame are slidably connected to the pair of sliding rods respectively. A first servo motor is fixedly installed on one side of the upper end of the quenching box, and the output end of the first servo motor is connected to the screw drive. The sliding rods, screw, and movable frame are all made of stainless steel.

[0017] The beneficial effects of adopting the above-mentioned further solution are that the first servo motor drives the screw to rotate, and the moving frame is smoothly raised and lowered along the slide bar through the threaded transmission, adjusting the position of the half-shaft sleeve in the quenching box; the stainless steel slide bar, screw and moving frame have the characteristics of corrosion resistance and high strength, ensuring stable operation in the quenching liquid spraying environment and extending the service life of the device.

[0018] Furthermore, a transmission box is inserted into one side of the upper end of the mobile frame, and a three-jaw chuck is rotatably connected to the upper end of the transmission box. A second servo motor is fixedly installed inside the transmission box, and the output end of the second servo motor is connected to the three-jaw chuck for transmission.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the second servo motor drives the three-jaw chuck to rotate through the transmission box, which drives the half-shaft sleeve to rotate at a uniform speed, so that the spiral induction coil is heated evenly and the spray ring quenching liquid is fully covered, ensuring the consistency of heat treatment in the circumferential direction of the half-shaft sleeve and improving product quality.

[0020] Furthermore, the axes of the three-jaw chuck, the spray ring, and the spiral induction coil are located on the same vertical line.

[0021] The beneficial effect of adopting the above-mentioned further scheme is that the axes of the three-jaw chuck, the spray ring and the spiral induction coil are collinear, ensuring that the half-shaft sleeve is in the center position during heating and quenching, avoiding uneven heating or quenching liquid spray deviation caused by eccentricity, and ensuring the accuracy and stability of the heat treatment process.

[0022] Furthermore, a protective door is hinged to one side of the quenching box via a pair of hinges.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the protective door is hinged to the quenching box, which makes it easy for operators to load and unload the half-shaft sleeve. At the same time, the protective door is closed during the heat treatment process to prevent splashing of quenching liquid and electromagnetic radiation during heating, thus ensuring the safety of operators.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows: In this half-shaft sleeve heat treatment device, the high-frequency induction heater of the heating mechanism uses a spiral induction coil to perform high-frequency induction heating on the half-shaft sleeve, achieving rapid and uniform temperature rise; the first servo motor of the quenching mechanism drives the screw to lift and lower the moving frame, and the second servo motor drives the three-jaw chuck to rotate, so that the half-shaft sleeve is accurately positioned and rotates at a uniform speed; the spray ring sprays quenching liquid evenly, and the through groove allows the quenching liquid at the bottom of the quenching box to enter the circulating water tank; the pump of the circulation mechanism draws the quenching liquid from the circulating water tank into the spray ring through a hose, spraying the half-shaft sleeve evenly; the filter screen filters impurities, filtering the impurities carried in the quenching liquid; the refrigeration system composed of the evaporator and condenser cools the quenching liquid, realizing the recycling and temperature control of the quenching liquid, and ensuring the quality of the half-shaft sleeve heat treatment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the heat treatment device for the half-shaft sleeve disclosed in this embodiment of the utility model. Figure 1 ;

[0026] Figure 2 This is a three-dimensional structural diagram of the heat treatment device for the half-shaft sleeve disclosed in this embodiment of the utility model. Figure 2 ;

[0027] Figure 3 This is a three-dimensional structural diagram of the heat treatment device for the half-shaft sleeve disclosed in this embodiment of the utility model. Figure 3 ;

[0028] Figure 4 This is a front cross-sectional view of the circulating water tank of the heat treatment device for the half-shaft sleeve disclosed in this utility model embodiment;

[0029] Figure 5 This is a front cross-sectional view of the transmission box of the heat treatment device for the half-shaft sleeve disclosed in an embodiment of this utility model.

[0030] In the diagram: 1. Quenching mechanism; 101. Quenching box; 102. First servo motor; 103. Protective door; 104. Slide rod; 105. Screw; 106. Moving frame; 107. Transmission box; 108. Three-jaw chuck; 109. Spray ring; 110. Through slot; 111. Pipe rack; 112. Pump; 113. Second servo motor; 114. Hose; 2. Circulation mechanism; 201. Box body; 202. Box door; 203. Circulating water tank; 204. Filter screen; 205. Reserved slot; 206. Heat-conducting plate; 207. Condenser; 208. Evaporator; 209. Compressor; 210. Dryer filter; 211. Expansion valve; 212. Cavity; 213. Temperature sensor; 3. Heating mechanism; 301. High-frequency induction heater; 302. Spiral induction coil. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-5 This utility model provides a technical solution: a heat treatment device for a half-shaft sleeve, including a quenching mechanism 1, a circulation mechanism 2, and a heating mechanism 3. The quenching mechanism 1 includes a quenching box 101, with several through slots 110 opened at the bottom of the quenching box 101. A pipe rack 111 is fixedly installed on the inner side of the quenching box 101, a spray ring 109 is fixedly installed on one side of the upper end of the pipe rack 111, and a pump 112 is fixedly installed at the bottom end of the pipe rack 111. The circulation mechanism 2 includes a box body 201. A circulating water tank 203 is slidably installed inside the quenching box 101. A filter screen 204 is snapped onto the upper end of the circulating water tank 203. A heat-conducting plate 206 is embedded in the bottom of the circulating water tank 203. The heating mechanism 3 includes a high-frequency induction heater 301 and a spiral induction coil 302. The high-frequency induction heater 301 is located on one side of the quenching box 101. The two ends of the spiral induction coil 302 are respectively inserted into the upper side of the interior of the quenching box 101. The two ends of the spiral induction coil 302 are electrically connected to the output end of the high-frequency induction heater 301 through wires. The high-frequency induction heater 301 of the heating mechanism 3 performs high-frequency induction heating on the half-shaft sleeve through the spiral induction coil 302 to achieve rapid and uniform temperature rise. The first servo motor 102 of the quenching mechanism 1 drives the screw 105 to drive the moving frame 106 to rise and fall. The second servo motor 113 drives the three-jaw chuck 108 to rotate, so that the half-shaft sleeve is accurately positioned and rotates at a uniform speed. The spray ring 109 sprays quenching liquid evenly. The through groove 110 allows The quenching liquid at the bottom of the quenching box 101 can enter the circulating water tank 203; the pump 112 of the circulation mechanism 2 draws the quenching liquid from the circulating water tank 203 into the spray ring 109 through the hose 114, spraying it evenly onto the half-shaft sleeve. The filter screen 204 filters impurities and removes impurities carried in the quenching liquid. The refrigeration system composed of the evaporator 208 and the condenser 207 cools the quenching liquid, realizing the recycling and temperature control of the quenching liquid and ensuring the heat treatment quality of the half-shaft sleeve.

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-5 A pre-reserved groove 205 is provided on one side of the upper end of the filter screen 204. A temperature sensor 213 is embedded in the inner wall of the circulating water tank 203. A flexible hose 114 is sleeved on the output end of the pump 112. The bottom end of the flexible hose 114 extends through the pre-reserved groove 205 into the interior of the circulating water tank 203. The output end of the pump 112 is connected to the bottom end of the pipe rack 111. A cavity 212 is provided at the bottom end of the circulating water tank 203. The bottom end of the heat-conducting plate 206 extends into the cavity 212 and is fixedly installed with an evaporator 208. A condenser 207 is inserted into one side of the cavity 212. A compressor 209, a dryer filter 210, and an expansion valve 211 are respectively installed at the bottom end of the cavity 212. The output end of compressor 209 is connected to the input end of condenser 207 via a pipe. The output end of condenser 207 is connected to the input end of dryer filter 210 via a pipe. The output end of dryer filter 210 is connected to one end of expansion valve 211 via a pipe. The other end of expansion valve 211 is connected to the input end of evaporator 208 via a pipe. The output end of evaporator 208 is connected to the input end of compressor 209 via a pipe. A ventilation grille is provided at the bottom of housing 201 on one side of condenser 207. A door 202 is hinged to the other side of housing 201 via a pair of hinges. Filter screen 204 filters impurities in quenching fluid to prevent clogging of spray ring 109 or contamination. A half-shaft sleeve; a temperature sensor 213 monitors the temperature of the quenching liquid in the circulating water tank 203 in real time, providing data support for the refrigeration system; a hose 114 connects the pump 112 to the circulating water tank 203 through a reserved groove 205, ensuring unobstructed circulation of the quenching liquid and improving circulation efficiency. The evaporator 208, condenser 207, and compressor 209 form the refrigeration system, which lowers the temperature of the quenching liquid through the principle of phase change: the compressor 209 compresses the refrigerant into a high-temperature, high-pressure gas, which is then liquefied by heat dissipation in the condenser 207. After passing through the dryer filter 210 and expansion valve 211, it becomes a low-temperature, low-pressure liquid, which absorbs heat and vaporizes in the evaporator 208, absorbing heat from the quenching liquid to achieve efficient cooling of the quenching liquid. To ensure the required quenching temperature, all components of the refrigeration system are connected by pipes to form a complete circuit, ensuring refrigerant circulation and continuous cooling. The dryer filter 210 removes moisture and impurities from the refrigerant, preventing blockage or corrosion in the refrigeration system. The expansion valve 211 controls the refrigerant flow, ensuring the refrigeration efficiency of the evaporator 208 and stabilizing the quenching liquid temperature within a suitable range, thus improving the consistency of heat treatment results. The ventilation grille provides an airflow channel for the condenser 207 to dissipate heat, preventing poor heat dissipation from affecting the cooling efficiency of the refrigeration system. The door 202 facilitates opening the circulating water tank 203 for maintenance operations such as filter replacement 204 and quenching liquid addition, improving the maintainability of the device.

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figures 1-5 A pair of sliding rods 104 are fixedly installed on one side of the quenching box 101. A screw 105 is rotatably connected between the pair of sliding rods 104 inside the quenching box 101. A movable frame 106 is threaded onto the screw 105. The two ends of the movable frame 106 are slidably connected to the pair of sliding rods 104 respectively. A first servo motor 102 is fixedly installed on one side of the upper end of the quenching box 101. The output end of the first servo motor 102 is connected to the screw 105 for transmission. The sliding rods 104, screw 105, and movable frame 106 are all made of stainless steel. A transmission box 107 is inserted into one side of the upper end of the 06. A three-jaw chuck 108 is rotatably connected to the upper end of the transmission box 107. A second servo motor 113 is fixedly installed inside the transmission box 107. The output end of the second servo motor 113 is connected to the three-jaw chuck 108. The axes of the three-jaw chuck 108, the spray ring 109, and the spiral induction coil 302 are located on the same vertical line. A protective door 103 is hinged to one side of the quenching box 101 through a pair of hinges. The first servo motor 102 drives the screw 105 to rotate, and the screw drives the movement... The moving frame 106 smoothly rises and falls along the slide bar 104, adjusting the position of the half-shaft sleeve within the quenching box 101. The stainless steel slide bar 104, screw 105, and moving frame 106 possess corrosion resistance and high strength, ensuring stable operation in the quenching liquid spray environment and extending the device's service life. The second servo motor 113 drives the three-jaw chuck 108 to rotate via the transmission box 107, causing the half-shaft sleeve to rotate at a uniform speed. This ensures uniform heating of the spiral induction coil 302 and comprehensive coverage of the quenching liquid by the spray ring 109, guaranteeing effective heat treatment of the half-shaft sleeve in the circumferential direction. To ensure consistency and improve product quality, the three-jaw chuck 108, spray ring 109, and spiral induction coil 302 are aligned, ensuring that the half-shaft sleeve is centered during heating and quenching. This avoids uneven heating or quenching liquid spraying deviation caused by eccentricity, ensuring the accuracy and stability of the heat treatment process. The protective door 103 is hinged to the quenching box 101, facilitating the loading and unloading of the half-shaft sleeve by operators. At the same time, the protective door 103 is closed during heat treatment to prevent quenching liquid splashing and electromagnetic radiation during heating, ensuring the safety of operators.

[0037] Specifically, the working principle of this half-shaft sleeve heat treatment device is as follows: In use, first open the protective door 103 to fix the half-shaft sleeve on the three-jaw chuck 108. The first servo motor 102 drives the screw 105 to rotate, causing the moving frame 106 to rise and fall along the slide bar 104, bringing the half-shaft sleeve to the predetermined position. At this time, the axes of the three-jaw chuck 108, the spray ring 109, and the spiral induction coil 302 are aligned. Next, the second servo motor 113 drives the three-jaw chuck 108 to rotate the half-shaft sleeve at a uniform speed. The high-frequency induction heater 301 performs high-frequency induction heating on the half-shaft sleeve through the spiral induction coil 302, causing it to heat up quickly and evenly. After heating is completed, the first servo motor 102 drives the screw 105 to rotate in the opposite direction, causing the moving frame 106 to descend along the slide bar 104. During the descent, the pump 112... Quenching fluid is drawn from the circulating water tank 203 through the flexible hose 114 and delivered to the spray ring 109, where it is evenly sprayed onto the half-shaft sleeve for quenching. After quenching, the liquid flows back to the circulating water tank 203 through the through groove 110 at the bottom of the quenching box 101. The filter screen 204 in the circulating water tank 203 filters the quenching fluid. The temperature sensor 213 in the circulating water tank 203 monitors the temperature of the quenching fluid in real time. When the temperature is too high, the refrigeration system consisting of the compressor 209, condenser 207, dryer filter 210, expansion valve 211, and evaporator 208 is started to reduce the temperature of the quenching fluid through refrigerant circulation. The ventilation grille at the bottom of the box 201 dissipates heat from the condenser 207. The box door 202 facilitates maintenance and operation, thereby realizing the recycling and temperature control of the quenching fluid and ensuring the quality and efficiency of the heat treatment of the half-shaft sleeve.

[0038] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, since this application is mainly used to protect mechanical devices, this application will not explain the control method and circuit connection in detail.

Claims

1. A heat treatment apparatus for a half-shaft sleeve, characterized in that, The system includes a quenching mechanism (1), a circulation mechanism (2), and a heating mechanism (3). The quenching mechanism (1) includes a quenching box (101), which has several through slots (110) at its bottom. A pipe rack (111) is fixedly installed on the inner side of the quenching box (101). A spray ring (109) is fixedly installed on one side of the upper end of the pipe rack (111). A pump (112) is fixedly installed at the bottom end of the pipe rack (111). The circulation mechanism (2) includes a box body (201), which has a circulating water tank (203) slidably installed inside the box body (201). A filter screen (204) is attached to the upper end of the circulating water tank (203). A heat-conducting plate (206) is embedded in the bottom of the interior of the circulating water tank (203). The heating mechanism (3) includes a high-frequency induction heater (301) and a spiral induction coil (302). The high-frequency induction heater (301) is located on one side of the quenching box (101). The two ends of the spiral induction coil (302) are respectively inserted into the upper side of the interior of the quenching box (101). The two ends of the spiral induction coil (302) are electrically connected to the output end of the high-frequency induction heater (301) through wires.

2. The heat treatment apparatus for a half-shaft sleeve according to claim 1, characterized in that, The filter screen (204) has a reserved groove (205) on one side of its upper end. A temperature sensor (213) is embedded in the inner wall of the circulating water tank (203). A hose (114) is sleeved on the output end of the pump (112). The bottom end of the hose (114) extends through the reserved groove (205) into the interior of the circulating water tank (203). The output end of the pump (112) is connected to the bottom end of the pipe rack (111).

3. The heat treatment apparatus for a half-shaft sleeve according to claim 2, characterized in that, The bottom of the circulating water tank (203) is provided with a cavity (212). The bottom of the heat-conducting plate (206) extends into the cavity (212) and is fixedly installed with an evaporator (208). A condenser (207) is inserted into one side of the cavity (212). A compressor (209), a dryer filter (210), and an expansion valve (211) are respectively installed at the bottom of the cavity (212).

4. The heat treatment apparatus for a half-shaft sleeve according to claim 3, characterized in that, The output end of the compressor (209) is connected to the input end of the condenser (207) through a pipe. The output end of the condenser (207) is connected to the input end of the dryer filter (210) through a pipe. The output end of the dryer filter (210) is connected to one end of the expansion valve (211) through a pipe. The other end of the expansion valve (211) is connected to the input end of the evaporator (208) through a pipe. The output end of the evaporator (208) is connected to the input end of the compressor (209) through a pipe.

5. The heat treatment apparatus for a half-shaft sleeve according to claim 4, characterized in that, The bottom of the housing (201) is provided with a ventilation grille on one side of the condenser (207), and the other side of the housing (201) is hinged with a door (202) by a pair of hinges.

6. The heat treatment apparatus for a half-shaft sleeve according to claim 1, characterized in that, A pair of slide rods (104) are fixedly installed on one side of the interior of the quenching box (101). A screw (105) is rotatably connected between the pair of slide rods (104) inside the quenching box (101). A movable frame (106) is threaded onto the screw (105). The two ends of the movable frame (106) are slidably connected to the pair of slide rods (104) respectively. A first servo motor (102) is fixedly installed on one side of the upper end of the quenching box (101). The output end of the first servo motor (102) is connected to the screw (105) for transmission. The slide rods (104), screw (105) and movable frame (106) are all made of stainless steel.

7. The heat treatment apparatus for a half-shaft sleeve according to claim 6, characterized in that, A transmission box (107) is inserted into one side of the upper end of the mobile frame (106). A three-jaw chuck (108) is rotatably connected to the upper end of the transmission box (107). A second servo motor (113) is fixedly installed inside the transmission box (107). The output end of the second servo motor (113) is connected to the three-jaw chuck (108) for transmission.

8. The heat treatment apparatus for a half-shaft sleeve according to claim 7, characterized in that, The axes of the three-jaw chuck (108), the spray ring (109), and the spiral induction coil (302) are located on the same vertical line.

9. The heat treatment apparatus for a half-shaft sleeve according to claim 1, characterized in that, A protective door (103) is hinged to one side of the quenching box (101) via a pair of hinges.

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