Hoisting structure in pit furnace

Abstract

The utility model discloses a hoisting structure in a pit furnace, which belongs to the technical field of pit furnaces, aims at solving the problems that a common pit furnace hoisting structure is inconvenient to operate during use and relatively poor in applicability, and comprises a hoisting plate, a mounting cavity is formed in the hoisting plate, and the top end of the mounting cavity is rotatably connected with a rotating shaft; a rotating disc is fixed to the bottom end of the rotating shaft, and a plurality of annularly-distributed sliding blocks slidably penetrate through the bottom end of the hoisting disc; according to the lifting structure, the rotating shaft is controlled to rotate in different rotating directions through the control assembly, then the distance between the lifting rods and the lifting hooks can be adjusted, cylindrical workpieces can be hooked and unhooked conveniently, the convenience of the lifting structure for lifting the workpieces is improved, meanwhile, the distance between the lifting hooks can be synchronously adjusted, and the lifting efficiency is improved. And the hoisting structure can conveniently assemble and disassemble the cylindrical workpieces with different calibers within a certain range, and has good applicability.

Description

Technical Field

[0001] This utility model relates to the field of furnace hoisting technology for heat treatment equipment, and in particular to a hoisting structure for a pit furnace. Background Technology

[0002] Heat treatment is one of the important processes in mechanical manufacturing. By changing the microstructure inside a metal workpiece, heat treatment can improve its performance, such as machinability, hardness, strength, and wear resistance. Many cylindrical workpieces (such as roller sleeves) are often heat treated using pit furnaces. Pit furnaces are the heat treatment equipment for large mechanical parts and components, and the pit furnace hoisting structure is an indispensable loading and unloading carrier.

[0003] The existing hoisting structure inside the pit furnace is relatively simple, making it inconvenient to hook and unhook inside the furnace, which poses a certain degree of danger and is not convenient to use. At the same time, the common hoisting structure inside the pit furnace is relatively fixed, making it inconvenient to adjust the spacing between the hooks, and cannot meet the hoisting requirements of cylindrical workpieces of different sizes, resulting in relatively poor applicability.

[0004] Therefore, a hoisting structure for pit-type furnaces is needed to solve the problems of inconvenient operation and relatively poor applicability of common pit-type furnace hoisting structures. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of existing hoisting structures in pit furnaces, such as inconvenience in hooking and unhooking, difficulty in adjusting the spacing between hooks, and relatively poor applicability. Therefore, this utility model proposes a hoisting structure for pit furnaces to reduce the difficulty of hoisting operation and improve the stability of the hoisting structure.

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

[0007] A hoisting structure for a pit-type furnace includes a hoisting plate with an installation cavity inside. A rotating shaft is rotatably connected to the top of the installation cavity, and a turntable is fixed to the bottom of the rotating shaft. Multiple annularly distributed sliders slide through the bottom of the hoisting plate. Multiple annularly distributed connecting rods are hinged to the bottom sidewall of the turntable away from its center. One end of each connecting rod is hinged to the top of one of the sliders. A connecting arm is fixed to the bottom of each slider, and a lifting rod is fixed to one end of each connecting arm. A hook is fixed to the bottom of each lifting rod. A hoisting column is fixed to the top of the hoisting plate, and a slot is formed inside the hoisting column. The top of the rotating shaft extends into the slot. A control component is installed inside the hoisting column, and a wire rope hoist is fixed to the top of the hoisting column.

[0008] It should be noted in the solution that the control component includes a control shaft rotatably connected to one side wall of the empty slot. A worm gear is fastened to the outer side wall of the control shaft, and a worm wheel is fastened to the outer side wall of the rotating shaft. The worm gear and the worm wheel mesh with each other. One end of the control shaft extends through to the outside of the lifting column. A support frame is fixed to the top of the lifting plate. The control shaft is rotatably connected to the support frame. A handle is fixed to one end of the control shaft.

[0009] It is worth noting that the bottom of the lifting platform is provided with multiple annularly distributed through slots, and multiple sliders pass through multiple through slots respectively. The two side walls of the sliders are slidably connected to the two side walls of the through slots.

[0010] Furthermore, it should be noted that a spring is fixed to one end of the through groove, and the other end of the spring is fixed to the corresponding slider.

[0011] In a preferred embodiment, the connecting arm contacts the bottom end of the lifting platform, and the contact surface between the connecting arm and the lifting platform is a smooth plane.

[0012] In a preferred embodiment, the rotating shaft and the control shaft are arranged perpendicularly to each other, the connecting arm and the boom are arranged perpendicularly to each other, and the multiple booms are arranged in a ring below the lifting plate with equal spacing between them.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) By controlling the rotation of the shaft in different directions through the control component, the spacing between multiple lifting rods and hooks can be adjusted, which facilitates the hooking and unhooking of cylindrical workpieces, improving the convenience of the lifting structure when lifting workpieces. At the same time, the spacing between multiple hooks can be adjusted synchronously, which facilitates the loading and unloading of cylindrical workpieces of different diameters within a certain range, and has good applicability.

[0015] (2) The lifting rod and hook can be controlled by turning the handle to hook and unhook the cylindrical workpiece, making it more convenient to load and unload the workpiece. At the same time, it can lift cylindrical workpieces of different sizes and models, and has good applicability. By setting a spring and connecting it to the through groove at one end of the slider, the slider can be used for leverage and buffering, which improves the stability during lifting and the accuracy of the movement of the sliding rod. Hard collisions are less likely to occur, which improves the service life. The worm and worm wheel have a self-locking effect, which can further improve the stability and firmness of the lifting structure. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of a hoisting structure inside a pit furnace proposed in this embodiment of the utility model;

[0017] Figure 2 This is a bottom view of the overall structure of a hoisting structure inside a pit furnace proposed in this embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the hoisting plate of a hoisting structure inside a well-type furnace proposed in an embodiment of this utility model;

[0019] Figure 4 This is a side sectional view of a hoisting structure inside a well-type furnace proposed in an embodiment of this utility model.

[0020] The following are the labels in the diagram: 1. Lifting plate; 2. Mounting cavity; 3. Rotary shaft; 4. Turntable; 5. Sliding block; 6. Connecting rod; 7. Connecting arm; 8. Lifting rod; 9. Lifting hook; 10. Lifting column; 11. Empty slot; 12. Control assembly; 121. Control shaft; 122. Worm gear; 123. Worm wheel; 124. Support frame; 125. Handle; 13. Wire hoist; 14. Through slot; 15. Spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please refer to Figures 1 to 4 This embodiment describes a hoisting structure inside a pit-type furnace, including a hoisting plate 1. The hoisting plate 1 has an internal installation cavity 2. A rotating shaft 3 is rotatably connected to the top of the installation cavity 2. A turntable 4 is fixed to the bottom of the rotating shaft 3. Multiple annularly distributed sliders 5 slide through the bottom of the hoisting plate 1. Multiple annularly distributed connecting rods 6 are hinged to the bottom sidewall of the turntable 4 away from the center. One end of each connecting rod 6 is hinged to the top of one of the sliders 5. A connecting arm 7 is fixed to the bottom of each slider 5. A lifting rod 8 is fixed to one end of each connecting arm 7. A hook 9 is fixed to the bottom of the lifting rod 8. A hoisting column 10 is fixed to the top of the hoisting plate 1. The column 10 has a slot 11, and the top of the rotating shaft 3 extends into the slot 11. The control component 12 is installed inside the column 10, and a wire rope hoist 13 is fixed to the top of the column 10. The rotating shaft 3 can be controlled to rotate in different directions by the control component 12, and the spacing between multiple lifting rods 8 and hooks 9 can be adjusted to facilitate the hooking and unhooking of cylindrical workpieces. This improves the convenience of lifting workpieces by the hoisting structure. At the same time, the spacing between multiple hooks 9 can be adjusted synchronously, which makes it easy for the hoisting structure to load and unload cylindrical workpieces of different diameters within a certain range, and has good applicability.

[0023] Specifically, the control assembly 12 includes a control shaft 121 rotatably connected to one side wall of the slot 11. A worm gear 122 is fastened to the outer side wall of the control shaft 121, and a worm wheel 123 is fastened to the outer side wall of the rotating shaft 3. The worm gear 122 and the worm wheel 123 mesh with each other. One end of the control shaft 121 extends to the outside of the lifting column 10. A support frame 124 is fixed to the top of the lifting plate 1. The control shaft 121 is rotatably connected to the support frame 124. A handle 125 is fixed to one end of the control shaft 121. By rotating the handle 125, the lifting rod 8 and the hook 9 can be controlled to hook and unhook the cylindrical workpiece, making it more convenient to load and unload the workpiece. At the same time, it can lift cylindrical workpieces of different sizes and models, and has good applicability.

[0024] It is worth further elaborating that the bottom of the lifting platform 1 has multiple annularly distributed through slots 14, and multiple sliders 5 pass through the multiple through slots 14 respectively. The two side walls of the sliders 5 are slidably connected to the two side walls of the through slots 14. A spring 15 is fixed to one end of the through slot 14, and the other end of the spring 15 is fixed to the corresponding slider 5. By setting the spring 15 at one end of the slider 5 and connecting it to the through slot 14, the slider 5 can be supported and buffered, improving the stability during lifting and the accuracy of the slider movement, reducing the risk of hard collisions, and increasing its service life.

[0025] This solution has the following working process: When using this pit furnace hoisting structure to load and unload cylindrical workpieces, firstly, the hoisting plate 1 is moved above the workpiece, and multiple lifting rods 8 and hooks 9 are placed inside the workpiece. Then, the handle 125 is turned to drive the control shaft 121 to rotate. When the control shaft 121 rotates, it drives the worm gear 122 to mesh with the worm wheel 123, which in turn drives the rotating shaft 3 to rotate. When the rotating shaft 3 rotates, it drives the turntable 4 to rotate. When the turntable 4 rotates, it drives the connecting rod 6 to extend outward, which in turn drives multiple sliders 5 to move away from each other. When the sliders 5 move, they drive the connecting arm 7 and the lifting rods 8 to move, causing the multiple lifting rods 8 to move away from each other and causing the hooks 9 to contact the inner wall of the workpiece. After the hooks 9 contact the inner wall of the workpiece, the handle 125 is stopped from being rotated. 25. Finally, the lifting column 10 and the lifting plate 1 are raised and lowered by the wire hoist 13. During the raising and lowering process, the hook 9 is engaged with the inner wall of the top of the workpiece, so that the workpiece is lifted into the pit furnace. After placement, the handle 125 is turned in the opposite direction, which drives the control shaft 121 to rotate in the opposite direction. Then, it engages with the worm gear 122 and worm wheel 123 to drive the rotating shaft 3 to rotate in the opposite direction. When the rotating shaft 3 rotates in the opposite direction, it drives the turntable 4 to rotate in the opposite direction. When the turntable 4 rotates in the opposite direction, it pulls the connecting rod 6, which in turn drives multiple sliders 5 and lifting rods 8 to move closer to each other, so that the hook 9 is separated from the inner wall of the top of the workpiece. Then the hooking is completed. Finally, the lifting plate 1 and its components are taken out of the furnace by the wire hoist 13 for subsequent processing. The operation is relatively convenient.

[0026] It is worth further elaborating that the connecting arm 7 contacts the bottom end of the lifting plate 1, and the contact surface between the connecting arm 7 and the lifting plate 1 is a smooth plane. The rotating shaft 3 and the control shaft 121 are arranged perpendicularly, and the connecting arm 7 and the lifting rod 8 are arranged perpendicularly. Multiple lifting rods 8 are arranged in a ring below the lifting plate 1, and the spacing between the multiple lifting rods 8 is equal.

[0027] The wire rope hoist 13 can be purchased from the market. The wire rope hoist 13 is equipped with a power supply, which is a mature technology in this field and has been fully disclosed. Therefore, it will not be described again in the specification.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hoisting structure for a pit-type furnace, comprising a hoisting platform (1), characterized in that, The hoisting plate (1) has an internal mounting cavity (2). A rotating shaft (3) is rotatably connected to the top of the mounting cavity (2). A turntable (4) is fixed to the bottom of the rotating shaft (3). Multiple sliders (5) arranged in a ring slide through the bottom of the hoisting plate (1). Multiple connecting rods (6) arranged in a ring are hinged to the bottom side wall of the turntable (4) away from the center. One end of each connecting rod (6) is hinged to the top of one of the sliders (5). A connecting arm (7) is fixed at the bottom end of the hoisting plate (1), a lifting rod (8) is fixed at one end of the connecting arm (7), a hook (9) is fixed at the bottom end of the lifting rod (8), a hoisting column (10) is fixed at the top end of the hoisting plate (1), a slot (11) is provided inside the hoisting column (10), the top end of the rotating shaft (3) extends into the slot (11), a control component (12) is provided inside the hoisting column (10), and a wire rope hoist (13) is fixed at the top end of the hoisting column (10).

2. The hoisting structure inside a pit-type furnace according to claim 1, characterized in that, The control assembly (12) includes a control shaft (121) rotatably connected to one side wall of the slot (11). A worm (122) is fastened to the outer side wall of the control shaft (121), and a worm wheel (123) is fastened to the outer side wall of the rotating shaft (3). The worm (122) and the worm wheel (123) mesh with each other. One end of the control shaft (121) extends through to the outside of the hoisting column (10). A support frame (124) is fixed at the top of the hoisting plate (1). The control shaft (121) is rotatably connected to the support frame (124). A handle (125) is fixed at one end of the control shaft (121).

3. The hoisting structure inside a pit furnace according to claim 1, characterized in that, The bottom end of the hoisting plate (1) is provided with a plurality of annularly distributed through slots (14), and a plurality of sliders (5) pass through the plurality of through slots (14) respectively. The two side walls of the sliders (5) are slidably connected to the two side walls of the through slots (14).

4. The hoisting structure inside a pit furnace according to claim 3, characterized in that, One end of the through groove (14) is fixed with a spring (15), and the other end of the spring (15) is fixed with the corresponding slider (5).

5. The hoisting structure inside a pit furnace according to claim 1, characterized in that, The connecting arm (7) contacts the bottom end of the lifting plate (1), and the contact surface between the connecting arm (7) and the lifting plate (1) is a smooth plane.

6. The hoisting structure inside a pit furnace according to claim 2, characterized in that, The rotating shaft (3) is perpendicular to the control shaft (121), the connecting arm (7) is perpendicular to the lifting rod (8), and the multiple lifting rods (8) are arranged in a ring below the lifting plate (1), with equal spacing between the multiple lifting rods (8).

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