Internal and external automatic hooking and unhooking device of heat treatment furnace

Abstract

The utility model discloses an inside and outside automatic hooking and unhooking device for a heat treatment furnace, which relates to the technical field of track pulleys and comprises a trailer and a tractor which are positioned on the same track, and a horizontal hanging rod for fixing the trailer is arranged on the inner wall of the heat treatment furnace; the mounting seat is fixed to the rear side of the trailer, and a mounting cavity is formed in the mounting seat; the front end of the hook is rotationally mounted at the top of the mounting seat, a torsional spring is arranged on a rotating shaft, and a hook groove matched with the hanging rod is formed in the rear side of the bottom; the upper end of the ejector rod is in contact with the bottom of the hook, and the lower end of the ejector rod is located in the mounting cavity; the moving rod penetrates through the trailer frame in a front-back sliding mode, and the rear end of the moving rod is located in the installation cavity and fixedly connected with a push block. The rear end of the push block is provided with a first extrusion slope making contact with the lower end of the ejector rod. A butt-joint assembly is arranged between the tractor and the trailer. According to the device, opening and closing of the hook can be controlled in a linkage mode through connection and separation of the butt joint assemblies, and therefore automatic hooking and unhooking of the trailer can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of track trolley technology, specifically to an automatic hook-and-unhook device for the inside and outside of a heat treatment furnace. Background Technology

[0002] In the production of petroleum equipment, most parts need to be fed into the heat treatment furnace via rail trolleys for heat treatment. However, existing manufacturers mostly use manual traction during the traction process, which is slow, inefficient, and cannot automatically fix the trolleys in the heat treatment furnace, meaning that automatic hooking and unhooking of the trolleys is not possible.

[0003] Therefore, there is an urgent need to develop a rail trolley capable of automatic engagement and disengagement. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic hook-and-unhook device for the inside and outside of a heat treatment furnace.

[0005] The technical solution of this utility model is: an automatic hook-and-unhook device for the inside and outside of a heat treatment furnace, including a trailer and a tractor located on the same track, and a horizontal hook rod for fixing the trailer is provided on the inner wall of the heat treatment furnace.

[0006] It also includes a mounting base, a hook, a top rod, and a movable rod. The mounting base is fixed to the rear side of the trailer and has a mounting cavity inside. The front end of the hook is rotatably mounted on the top of the mounting base, and a torsion spring is provided on its rotating shaft. A hook groove adapted to the hook rod is opened on the rear side of its bottom. The top rod slides vertically through the mounting base, with its upper end contacting the bottom of the hook and its lower end located in the mounting cavity. The movable rod slides back and forth through the trailer frame, with its rear end located in the mounting cavity and fixedly connected to a push block. The rear end of the push block has a first pressing slope that contacts the lower end of the top rod. When the front end of the push block contacts the inner wall of the mounting cavity, the lower end of the top rod remains in contact with the first pressing slope, and the hook is in a horizontal state.

[0007] A docking assembly is provided between the tractor and the trailer. When the docking assembly is docked, the moving rod moves backward, causing the top rod to lift the hook upward.

[0008] Preferably, the docking assembly is located on one side of the moving rod and includes a telescopic device, a bracket, a plug rod, a first ear plate, a second ear plate, a sleeve, and a push rod. The telescopic device is mounted on the rear side of the tractor vehicle via the bracket, and its output end is fixedly connected to the plug rod. Two first ear plates are fixed side by side on the rear side of the tractor vehicle and are perpendicular to the plug rod. The second ear plate is fixed on the front side of the trailer vehicle and is located on the symmetrical plane of the two first ear plates. Both the first and second ear plates have insertion holes adapted to the plug rod, and the insertion holes on the two first ear plates are directly opposite the plug rod. The sleeve is vertically fixed on the first ear plate near the moving rod, and its inner cavity communicates with the insertion holes. The push rod is slidably installed inside the sleeve.

[0009] The front end of the movable rod is provided with a second pressing slope, and the rear side of the tractor is provided with a limiter. When the limiter contacts the front side of the trailer, the insertion holes on the two first ear plates and the second ear plates are aligned. At this time, the outer end of the push rod corresponds to the second pressing slope.

[0010] Preferably, the telescopic device is an electric push rod.

[0011] Preferably, rollers are installed at the lower end of the top rod and the outer end of the push rod.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] This device uses a tractor to tow the trailer, replacing manual towing and effectively improving work efficiency. Through the connection and separation of the docking components, the device can control the opening and closing of the hook, thereby enabling automatic hooking and unhooking of the trailer. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a sectional view of the mounting base and hook.

[0016] Figure 3 This is a top view of the present invention.

[0017] In the diagram: 1. Inner wall of heat treatment furnace; 2. Hanging rod; 3. Positioning rod; 4. Trailer; 5. Tractor; 6. Mounting seat; 601. Mounting cavity; 7. Hook; 701. Hook groove; 8. Top rod; 9. Moving rod; 901. Second extrusion slope; 10. Push block; 1001. First extrusion slope; 11. Telescopic device; 12. Bracket; 13. Insert rod; 14. First ear plate; 15. Second ear plate; 16. Sleeve; 17. Push rod; 18. Limiter; 19. Roller. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0019] Reference Figure 1-3 As shown, an automatic hook-and-unhook device for the inside and outside of a heat treatment furnace includes a trailer 4 and a tractor 5 located on the same track. The inner wall 1 of the heat treatment furnace is provided with a horizontal hook 2 for fixing the trailer 4 and a positioning rod 3 for positioning.

[0020] It also includes a mounting base 6, a hook 7, a push rod 8, and a moving rod 9. The mounting base 6 is fixed to the rear side of the trailer 4 and has a mounting cavity 601 inside. The front end of the hook 7 is rotatably mounted on the top of the mounting base 6, and a torsion spring is provided on its rotating shaft. The bottom rear side of the hook 7 has a hook groove 701 that is adapted to the hook rod 2. The push rod 8 slides vertically through the mounting base 6, with its upper end contacting the bottom of the hook 7 and its lower end located in the mounting cavity 601. The moving rod 9 slides back and forth through the frame of the trailer 4, with its rear end located in the mounting cavity 601 and fixedly connected to a push block 10. The rear end of the push block 10 has a first pressing inclined surface 1001 that contacts the lower end of the push rod 8. When the front end of the push block 10 contacts the inner wall of the mounting cavity 601, the lower end of the push rod 8 remains in contact with the first pressing inclined surface 1001, and the hook 7 is in a horizontal state.

[0021] A docking assembly is provided between the tractor 5 and the trailer 4. When the docking assembly docks, the moving rod 9 moves backward, causing the push rod 8 to push the hook 7 upward.

[0022] Initially, trailer 4 is located outside the heat treatment furnace, separated from tractor 5. Under the action of the torsion spring, hook 7 of trailer 4 is attached to the top of mounting base 6 in a horizontal position. Before towing, tractor 5 is connected to trailer 4: after tractor 5 approaches trailer 4, the docking components between the two are engaged. At this time, moving rod 9 moves backward, and moving rod 9 pushes top rod 8 upward through the first extrusion ramp 1001, thereby lifting hook 7. Then tractor 5 pushes trailer 4 into the heat treatment furnace. When the rear of trailer 4 is connected... When the positioning rod 3 is touched, both stop moving; then the docking assembly between the tractor 5 and the trailer 4 separates. At this time, under the action of the torsion spring, the hook 7 drives the moving rod 9 to reset through the push rod 8, and the hook 7 returns to a horizontal state. Its hook groove 701 is hooked onto the hanging rod 2, thereby fixing the trailer 4 in the heat treatment furnace. After the heat treatment is completed, the tractor 5 is connected to the trailer 4 again. At this time, the push rod 8 pushes the hook 7 upward to disengage the hook 7 from the hanging rod 2. Finally, the tractor 5 pulls the trailer 4 out of the heat treatment furnace. Example 2

[0023] As a preferred embodiment of this utility model, this embodiment designs the docking component based on Embodiment 1, specifically as follows:

[0024] The docking assembly is located on one side of the moving rod 9 and includes a telescopic device 11, a bracket 12, a plug rod 13, a first ear plate 14, a second ear plate 15, a sleeve 16, and a push rod 17. The telescopic device 11 is installed on the rear side of the tractor 5 via the bracket 12, and its output end is fixedly connected to the plug rod 13. Two first ear plates 14 are fixed side by side on the rear side of the tractor 5 and are perpendicular to the plug rod 13. The second ear plate 15 is fixed on the front side of the trailer 4 and is located on the symmetrical plane of the two first ear plates 14. Both the first ear plate 14 and the second ear plate 15 have insertion holes adapted to the plug rod 13, and the insertion holes on the two first ear plates 14 are directly opposite the plug rod 13. The sleeve 16 is vertically fixed on the first ear plate 14 near the moving rod 9, and its inner cavity communicates with the insertion hole. The push rod 17 is slidably installed inside the sleeve 16.

[0025] The front end of the moving rod 9 is provided with a second extrusion slope 901, and the rear side of the tractor 5 is provided with a limiter 18. When the limiter 18 contacts the front side of the trailer 4, the holes on the two first ear plates 14 and the second ear plates 15 are aligned. At this time, the outer end of the push rod 17 corresponds to the second extrusion slope 901.

[0026] More specifically, in this embodiment, the telescopic device 11 is an electric push rod.

[0027] After the limiter 18 of the tractor 5 contacts the trailer 4, the docking components are docked: the electric push rod 17 is activated, and its output end extends out, carrying the insertion rod 13 through the three insertion holes, thus completing the connection between the tractor 5 and the trailer 4; then the output end of the electric push rod 17 continues to extend, causing the insertion rod 13 to push the push rod 17 out of the sleeve 16, and the outer end of the push rod 17 pushes the moving rod 9 backward through the cooperation with the second extrusion inclined surface 901, thereby causing the push rod 8 to push the hook 7 upward.

[0028] Separation of the docking components: The output end of the electric push rod 17 retracts with the insertion rod 13. Then, under the action of the torsion spring, the hook 7 pushes the moving rod 9 forward through the top rod 8 to reset it. The moving rod 9 then pushes the push rod 17 back into the sleeve 16 through the second pressing inclined surface 901. Example 3

[0029] As a preferred embodiment of this utility model, this embodiment adds a roller 19 based on embodiment two, specifically:

[0030] To reduce the friction between the push rod 8 and push rod 17 and the extrusion slope, rollers 19 are installed at the lower end of the push rod 8 and the outer end of the push rod 17.

[0031] In summary, this device uses a tractor 5 to tow a trailer 4, replacing manual towing and effectively improving work efficiency; through the connection and separation of the docking components, this device can control the opening and closing of the hook 7, thereby enabling the automatic hooking and unhooking of the trailer 4.

[0032] This utility model is not limited to the above-described embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model, and the changed content still falls within the protection scope of this utility model.

Claims

1. An automatic hook-and-unhook device for the inside and outside of a heat treatment furnace, comprising a trailer and a tractor located on the same track, characterized in that: The inner wall of the heat treatment furnace is equipped with horizontal hanging rods for securing trailers; It also includes a mounting base, a hook, a top rod, and a movable rod. The mounting base is fixed to the rear side of the trailer and has a mounting cavity inside. The front end of the hook is rotatably mounted on the top of the mounting base, and a torsion spring is provided on its rotating shaft. A hook groove adapted to the hook rod is opened on the rear side of its bottom. The top rod slides vertically through the mounting base, with its upper end contacting the bottom of the hook and its lower end located in the mounting cavity. The movable rod slides back and forth through the trailer frame, with its rear end located in the mounting cavity and fixedly connected to a push block. The rear end of the push block has a first pressing slope that contacts the lower end of the top rod. When the front end of the push block contacts the inner wall of the mounting cavity, the lower end of the top rod remains in contact with the first pressing slope, and the hook is in a horizontal state. A docking assembly is provided between the tractor and the trailer. When the docking assembly is docked, the moving rod moves backward, causing the top rod to lift the hook upward.

2. The automatic hook-and-unhook device for the inside and outside of a heat treatment furnace according to claim 1, characterized in that: The docking assembly is located on one side of the moving rod and includes a telescopic device, a bracket, a plug rod, a first ear plate, a second ear plate, a sleeve, and a push rod. The telescopic device is mounted on the rear side of the tractor unit via the bracket, and its output end is fixedly connected to the plug rod. Two first ear plates are fixed side by side on the rear side of the tractor unit and are perpendicular to the plug rod. The second ear plate is fixed on the front side of the trailer unit and is located on the symmetrical plane of the two first ear plates. Both the first and second ear plates have insertion holes adapted to the plug rod, and the insertion holes on the two first ear plates are directly opposite the plug rod. The sleeve is vertically fixed on the first ear plate near the moving rod, and its inner cavity communicates with the insertion holes. The push rod is slidably installed inside the sleeve. The front end of the movable rod is provided with a second pressing slope, and the rear side of the tractor is provided with a limiter. When the limiter contacts the front side of the trailer, the insertion holes on the two first ear plates and the second ear plates are aligned. At this time, the outer end of the push rod corresponds to the second pressing slope.

3. The automatic hook-and-unhook device for the inside and outside of a heat treatment furnace according to claim 2, characterized in that: The telescopic device is an electric push rod.

4. The automatic hook-and-unhook device for the inside and outside of a heat treatment furnace according to claim 2, characterized in that: Rollers are installed at the lower end of the push rod and the outer end of the push rod.

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