Heavy load gear heat treatment equipment

Abstract

The utility model discloses a heavy -duty gear heat treatment equipment relates to gear heat treatment field, including carburizing furnace and frame board, the top of frame board is fixed with the connecting column, the top of frame board is fixed with four groups of support column, the top of support board is fixed with the blocking column, the top of support board is installed six groups of support ball. The utility model solves the problem that the gear appears large -area carburizing blind area and the inside hardness of hub is too high in the carburizing heat treatment process of gear, when placing the gear to the carburizing furnace inside and carrying out carburizing heat treatment, can be hung on the outer wall of blocking column, and the hub of gear is shielded to blocking column, thereby reducing carbon atom contact to hub surface, and the outer wall of blocking column bottom is provided with knurl, and the knurl can increase the friction between blocking column and gear hub, thereby realizing the support fixing of blocking column to gear, if the quality of gear is bigger, the support ball on support board can support gear, thereby reducing the carburizing blind area of gear end face.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty gear heat treatment equipment. Background Technology

[0002] Heavy-duty gears are core transmission components in the industrial field that withstand high loads, high torques, and complex dynamic stresses. They are widely used in mining machinery, wind power equipment, metallurgical machinery, and heavy-duty vehicle gearboxes. The gears must have high strength, high fatigue resistance, and high wear resistance in certain areas to adapt to long-term continuous operation and large load fluctuations.

[0003] Heavy-duty gears need to achieve the performance goal of "local strengthening and overall toughness balance" through heat treatment. Carburizing heat treatment is the core process for this requirement. Carburizing heat treatment involves placing the gear in a carburizing atmosphere at 900℃, allowing carbon atoms to penetrate to the surface of the gear block and form a 2.0mm high-carbon carburized layer. After quenching and low-temperature tempering, the hardness of the tooth surface can be increased to 58HRC, thereby enhancing the wear resistance of the gear block. At the same time, the carburized layer at the tooth root can effectively inhibit the initiation of fatigue cracks and improve fatigue life. Since the gear hub needs to maintain good toughness to adapt to the interference fit with the drive shaft and the impact buffering during load transmission, excessive carburizing is not required.

[0004] Currently, heavy-duty gear carburizing processes mostly employ pit-type carburizing furnaces. To improve production efficiency, operators often randomly stack multiple sets of gears directly into a metal frame before feeding them into the furnace as a whole. This stacking method causes one end face of the gear to adhere extensively to the frame surface, completely blocking the contact area and preventing the carburizing atmosphere from penetrating to that area, thus creating a carburizing blind zone. This affects the overall fatigue resistance of the gear. Furthermore, since the hubs of the gears are completely exposed to the carburizing atmosphere when they are randomly stacked, carbon atoms will indiscriminately penetrate to the hub surface, resulting in excessively high hub hardness and a significant decrease in toughness, which seriously affects the assembly reliability and service safety of the gears. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a heavy-duty gear heat treatment device to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heavy-duty gear heat treatment device, comprising a carburizing furnace and a frame plate, wherein a reaction chamber is provided inside the carburizing furnace, resistance heating elements are installed on the inner wall of the reaction chamber, a frame plate is provided inside the reaction chamber, a connecting column is fixed to the top of the frame plate, four sets of support columns are fixed to the top of the frame plate, support plates are installed at the ends of the support columns, a stop column is fixed to the top of the support plate, gears are sleeved on the outer wall of the stop column, and six sets of support balls are installed on the top of the support plate.

[0007] By adopting the above technical solution, the problems of large-area carburization blind zones at the ends of gears and excessively high hardness inside the hub during carburizing heat treatment are solved. When the gear is placed inside the carburizing furnace for carburizing heat treatment, the gear can be hung on the outer wall of the baffle. The baffle shields the hub of the gear, thereby reducing the contact of carbon atoms with the hub surface. The outer wall at the bottom of the baffle is knurled, which increases the friction between the baffle and the gear hub, thereby achieving the support and fixation of the gear by the baffle. If the gear has a large mass, the support ball on the support plate can support the gear, thereby reducing the carburization blind zone on the gear end face.

[0008] The present invention is further configured such that a locking post is provided at the top of the connecting post, and a hanging post is installed at the top of the locking post.

[0009] Preferably, the top of the connecting column is fixedly connected with a clamping column and a hanging column in sequence. In addition to being able to be hooked onto the hanging column and lifted by using hooks, the frame plate can also be clamped onto the clamping column at the top of the connecting column by using self-centering lifting clamps, so that the self-centering lifting clamps can clamp and lift the frame plate.

[0010] The present invention is further configured such that a guide post is fixed to the top of the stop post, and the guide post is configured as a tapered post.

[0011] Preferably, when the gear is fitted onto the guide post, the gear slides downwards due to its own weight, causing the gear to slide down the outer wall of the guide post onto the outer wall of the stop post.

[0012] The present invention is further provided that the bottom outer wall of the stop post is provided with knurling, and the knurling is provided as straight raised lines, and the knurling lines are arranged vertically downward.

[0013] Preferably, the raised knurling on the outer wall of the bottom of the stop post can increase the friction between the stop post and the inner wall of the gear hub, so that the stop post can support and fix the lighter gear.

[0014] The present invention is further configured such that the height of the knurled top is higher than the height of the top wall of the supporting ball, and the gap between the stop post and the inner wall of the gear hub is less than 0.02mm.

[0015] Preferably, the baffle blocks the inner wall of the gear hub, reducing the contact reaction between carbon atoms and the wall of the gear hub.

[0016] The present invention is further configured such that a sealing groove is provided on the top of the carburizing furnace, a rotary lifter is fixedly installed on the outer wall of the carburizing furnace, a hydraulic rod is installed on the top of the rotary lifter, a connecting plate is connected to the end of the hydraulic rod, a fixing column is fixed to the bottom of the connecting plate, a cover plate is connected to the bottom of the fixing column, a sealing ring is provided at the bottom of the cover plate, and a control box is installed on the outer wall of the carburizing furnace.

[0017] Preferably, the sealing ring of the cover plate is embedded in the sealing groove at the top of the carburizing furnace, so that the reaction chamber is in a sealed state.

[0018] The present invention is further configured such that an air inlet pipe is connected to the top of the cover plate, a check valve is installed at the end of the air inlet pipe, a motor is installed on the top of the cover plate, and a fan blade is provided at the output end of the motor.

[0019] Preferably, when the gas enters the reaction chamber, the rotating fan blades blow the gas downwards.

[0020] The present invention is further configured such that a pressure valve is installed at the bottom of the carburizing furnace, an exhaust pipe is connected to the end of the pressure valve, and an exhaust hole is provided at the bottom of the carburizing furnace.

[0021] Preferably, when the gas pressure inside the reaction chamber exceeds a set value, the gas inside the reaction chamber flows into the exhaust pipe through the exhaust port.

[0022] In summary, the present invention has the following main advantages: 1. This utility model solves the problems of large-area carburization blind spots and excessively high hardness inside the hub of gears during carburizing heat treatment by setting up a frame plate, connecting column, support column, support plate, knurling, support ball, and stop column. When the gear is placed inside the carburizing furnace for carburizing heat treatment, the gear can be hung on the outer wall of the stop column. The stop column shields the hub of the gear, thereby reducing the contact of carbon atoms with the hub surface. The outer wall of the bottom of the stop column is knurled, which increases the friction between the stop column and the gear hub, thereby achieving the support and fixation of the gear by the stop column. If the gear has a large mass, the support ball on the support plate can support the gear, thereby reducing the carburization blind spot on the gear end face.

[0023] 2. This utility model sets up connecting columns, clamping columns, and hanging columns. The top of the connecting column is fixedly connected to the clamping column and the hanging column in sequence. In addition to using hooks to hook the frame plate onto the hanging column to hold and lift it, it can also use self-centering lifting clamps to clamp the frame plate on the clamping column at the top of the connecting column, so that the self-centering lifting clamps can clamp and lift the frame plate. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the carburizing furnace of this utility model; Figure 2 This is a schematic diagram of the interior of the carburizing furnace of this utility model; Figure 3 This is a schematic diagram of the interior of the cover plate of this utility model; Figure 4 This is a schematic diagram of the overall frame of this utility model; Figure 5 This is a plan view of the shelf of this utility model.

[0025] Explanation of reference numerals in the attached figures: 1. Carburizing furnace; 101. Reaction chamber; 102. Resistance heating element; 103. Sealing groove; 104. Exhaust port; 105. Exhaust pipe; 106. Pressure valve; 2. Cover plate; 201. Sealing ring; 202. Fixing column; 203. Connecting plate; 204. Hydraulic rod; 205. Rotary lifting device; 206. Control box; 207. Air inlet pipe; 208. Check valve; 209. Motor; 210. Fan blade; 3. Frame plate; 301. Connecting column; 302. Clamping column; 303. Hanging column; 304. Support column; 305. Support plate; 306. Support ball; 307. Stop column; 308. Guide column; 309. Knurling; 4. Gear. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of this utility model will be described below based on its overall structure.

[0028] Please see Figure 1 — Figure 5The system includes a carburizing furnace 1 and a support plate 3. The carburizing furnace 1 has a reaction chamber 101 inside, with resistance heating elements 102 installed on the inner wall of the reaction chamber 101. The support plate 3 is located inside the reaction chamber 101, with a connecting column 301 fixed to the top of the support plate 3. Four sets of support columns 304 are also fixed to the top of the support plate 3. Support plates 305 are installed at the ends of the support columns 304, and baffles 307 are fixed to the top of the support plates 305. Gears 4 are fitted onto the outer wall of the baffles 307. Six sets of support balls 306 are installed on the top of the support plates 305. This system solves the problem of large-area carburization blind spots appearing at the ends of gears during the carburizing heat treatment process. To address the issue of excessive hardness in the gear 4 area and inside the hub, when the gear 4 is placed inside the carburizing furnace 1 for carburizing heat treatment, the gear 4 can be hung on the outer wall of the baffle 307. The baffle 307 shields the hub of the gear 4, thereby reducing the contact of carbon atoms with the hub surface. The outer wall at the bottom of the baffle 307 is provided with knurling 309, which increases the friction between the baffle 307 and the hub of the gear 4, thus achieving the support and fixation of the gear 4 by the baffle 307. If the gear 4 has a large mass, the support ball 306 on the support plate 305 can support the gear 4, thereby reducing the carburizing blind zone on the end face of the gear 4.

[0029] For details regarding the above embodiments, please refer to [link / reference]. Figure 4 The top of the connecting column 301 is provided with a locking column 302, and the top of the locking column 302 is equipped with a hanging column 303. The top of the connecting column 301 is fixedly connected with the locking column 302 and the hanging column 303 in sequence. In addition to being able to use hooks to hook onto the hanging column 303 to hold and lift it, the frame plate 3 can also be held and lifted by using self-centering lifting clamps to clamp onto the locking column 302 at the top of the connecting column 301.

[0030] For details regarding the above embodiments, please refer to [link / reference]. Figure 4 The top of the stop post 307 is fixed with a guide post 308, which is a tapered post. When the gear 4 is fitted onto the guide post 308, the gear 4 slides downward due to its own weight, causing the gear 4 to slide down along the outer wall of the guide post 308 onto the outer wall of the stop post 307.

[0031] For details regarding the above embodiments, please refer to [link / reference]. Figure 5 The bottom outer wall of the stop post 307 is provided with knurling 309, and the knurling 309 is set as straight raised lines, and the knurling 309 is set vertically downward. The raised knurling 309 on the bottom outer wall of the stop post 307 can increase the friction between the stop post 307 and the inner wall of the gear 4 hub, so that the stop post 307 can support and fix the lighter gear 4.

[0032] For details regarding the above embodiments, please refer to [link / reference]. Figure 5The top height of the knurled 309 is higher than the top wall height of the support ball 306. The gap between the stop post 307 and the inner wall of the gear 4 hub is less than 0.02mm. The stop post 307 shields the inner wall of the gear 4 hub, reducing the contact reaction between carbon atoms and the wall of the gear 4 hub.

[0033] For details regarding the above embodiments, please refer to [link / reference]. Figure 1 The top of the carburizing furnace 1 is provided with a sealing groove 103. A rotary lift 205 is fixedly installed on the outer wall of the carburizing furnace 1. A hydraulic rod 204 is installed on the top of the rotary lift 205. A connecting plate 203 is connected to the end of the hydraulic rod 204. A fixing column 202 is fixed to the bottom of the connecting plate 203. A cover plate 2 is connected to the bottom of the fixing column 202. A sealing ring 201 is provided at the bottom of the cover plate 2. A control box 206 is installed on the outer wall of the carburizing furnace 1. The sealing ring 201 of the cover plate 2 is embedded in the sealing groove 103 on the top of the carburizing furnace 1, so that the reaction chamber 101 is in a sealed state.

[0034] For details regarding the above embodiments, please refer to [link / reference]. Figure 1 and Figure 3 The top of the cover plate 2 is connected to an air inlet pipe 207, and a check valve 208 is installed at the end of the air inlet pipe 207. A motor 209 is installed on the top of the cover plate 2, and a fan blade 210 is provided at the output end of the motor 209. When the gas enters the reaction chamber 101, the rotating fan blade 210 blows the gas downward.

[0035] For details regarding the above embodiments, please refer to [link / reference]. Figure 2 and Figure 3 A pressure valve 106 is installed at the bottom of the carburizing furnace 1. An exhaust pipe 105 is connected to the end of the pressure valve 106. An exhaust hole 104 is opened at the bottom of the carburizing furnace 1. When the gas pressure inside the reaction chamber 101 exceeds the set value, the gas inside the reaction chamber 101 flows into the exhaust pipe 105 through the exhaust hole 104.

[0036] In practical operation, when the four gears need to be placed inside the carburizing furnace 1 for carburizing heat treatment, the gear 4 is first hung on the guide column 308. Since the guide column 308 is a conical column, the gear 4 will slide down on the guide column 308 to the outer wall of the stop column 307 due to its own weight. Since the bottom wall of the stop column 307 is provided with knurling 309, when the gear 4 slides to the bottom of the stop column 307, the friction between the hub of the gear 4 and the knurling 309 of the stop column 307 will increase, so that the gear 4 will not easily slide or shake during the transportation of the frame plate 3. In addition, the bottom end face of the gear 4 will contact the wall surface of the multiple sets of support balls 306 on the top of the support plate 305, and the multiple sets of support balls 306 support and fix the gear 4. Then, the hook of the lifting device is hooked onto the hanging column 303 at the top of the frame plate 3. The frame plate 3 is placed into the reaction chamber 101 of the carburizing furnace 1 using the lifting device. Subsequently, the operator controls the rotary lift 205 through the control box 206. The rotary lift 205 first raises the cover plate 2 to a certain height through the hydraulic rod 204, and then rotates the cover plate 2, causing it to move to a position directly above the carburizing furnace 1. Then, the rotary lift 205 lowers the cover plate 2 through the hydraulic rod 204 to cover the top of the carburizing furnace 1, thereby sealing the carburizing furnace 1. Subsequently, the control box 206 controls the operation of the resistance heating element 102 on the inner wall of the carburizing furnace 1, causing the resistance heating element to... 102 heats the interior of reaction chamber 101, and the gas conveying equipment delivers the reaction gas into the carburizing furnace 1 through the inlet pipe 207. When the reaction gas is delivered into the carburizing furnace 1, the control box 206 controls the motor 209 to operate, so that the motor 209 drives the fan blade 210 at its end to rotate. The rotating fan blade 210 blows the reaction gas located at the top of reaction chamber 101 to the bottom of reaction chamber 101. The intelligent gas pressure valve 106 installed at the bottom of the carburizing furnace 1 monitors the gas pressure inside reaction chamber 101. When the gas pressure in reaction chamber 101 is greater than the set value, the gas at the bottom of reaction chamber 101 is discharged into the exhaust pipe 105 through the exhaust port 104.

[0037] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A heavy-duty gear heat treatment apparatus comprising a carburizing furnace (1) and a rack plate (3), characterized by: The carburizing furnace (1) has a reaction chamber (101) inside. The inner wall of the reaction chamber (101) is equipped with a resistance heating element (102). The reaction chamber (101) has a frame plate (3) inside. The top of the frame plate (3) is fixed with a connecting column (301). The top of the frame plate (3) is fixed with four sets of support columns (304). The end of the support column (304) is equipped with a support plate (305). The top of the support plate (305) is fixed with a baffle column (307). The outer wall of the baffle column (307) is fitted with a gear (4). The top of the support plate (305) is equipped with six sets of support balls (306).

2. A heavy-duty gear heat treatment apparatus according to claim 1, characterized by: The top of the connecting column (301) is provided with a locking column (302), and the top of the locking column (302) is equipped with a hanging column (303).

3. The heavy-duty gear heat treatment apparatus according to claim 1, characterized by: The top of the stop post (307) is fixed with a guide post (308), and the guide post (308) is configured as a tapered post.

4. The heavy-duty gear heat treatment apparatus according to claim 1, characterized by: The bottom outer wall of the stop post (307) is provided with knurling (309), and the knurling (309) is set as straight raised lines, and the knurling (309) is set vertically downward.

5. A heavy-duty gear heat treatment apparatus according to claim 4, wherein: The top height of the knurled (309) is higher than the top wall height of the support ball (306), and the gap between the stop post (307) and the inner wall of the gear (4) hub is less than 0.02 mm.

6. A heavy-duty gear heat treatment apparatus according to claim 1, characterized by: The top of the carburizing furnace (1) is provided with a sealing groove (103). A rotary lifter (205) is fixedly installed on the outer wall of the carburizing furnace (1). A hydraulic rod (204) is installed on the top of the rotary lifter (205). A connecting plate (203) is connected to the end of the hydraulic rod (204). A fixing column (202) is fixed to the bottom of the connecting plate (203). A cover plate (2) is connected to the bottom of the fixing column (202). A sealing ring (201) is provided at the bottom of the cover plate (2). A control box (206) is installed on the outer wall of the carburizing furnace (1).

7. A heavy-duty gear heat treatment apparatus according to claim 6, wherein: An air inlet pipe (207) is connected to the top of the cover plate (2), and a check valve (208) is installed at the end of the air inlet pipe (207). A motor (209) is installed on the top of the cover plate (2), and a fan blade (210) is provided at the output end of the motor (209).

8. The heavy-duty gear heat treatment apparatus according to claim 1, characterized by: The bottom of the carburizing furnace (1) is equipped with a pressure valve (106), and the end of the pressure valve (106) is connected to an exhaust pipe (105). An exhaust hole (104) is opened at the bottom of the carburizing furnace (1).

Images