Safety lifting device for self-locking anti-falling type hand chain hoist

Abstract

The utility model relates to hand chain hoist device technical field discloses self -locking anti -type hand chain hoist safety hoist device, including the hook, the bottom rotation of hook is connected with the rotating block, the outer wall both sides of rotating block all rotationally connected with the limiting disc, the right side rotation of left side limiting disc is connected with the discharge gear, the right side fixed connection of discharge gear has the rotating gear, the outer wall left side rotation of right side limiting disc is connected with the gear change, the outer wall right part rear side fixed connection of right side limiting disc has the hollow board. In the utility model, through the discharge gear drive rotating gear, make gear change and mesh gear rotate, produce suction, extract cooling liquid in storage tank, guide into cooling ring through hollow board and liquid outlet pipe, cooling ring absorbs the heat above brake disc, return storage tank through liquid discharge pipe, reduce the temperature of brake disc, prevent the safety accident that causes overheating failure to initiate.

Description

Technical Field

[0001] This utility model relates to the technical field of hand chain hoist devices, and in particular to a self-locking, anti-detachment type hand chain hoist safety lifting device. Background Technology

[0002] Self-locking anti-derailment hand chain hoists are important lifting equipment widely used in many fields such as industrial production, construction and logistics handling. Their main function is to lift and lower heavy objects through manual operation using the mechanical structure of chains and sprockets. At the same time, thanks to their self-locking and anti-derailment functions, they effectively ensure the stability and safety of heavy objects during the lifting process, prevent the heavy objects from accidentally slipping, and provide reliable heavy object handling support for various work scenarios.

[0003] However, existing self-locking anti-derailment hand chain hoists still have some problems that need to be solved in actual use. Currently, hand chain hoists mainly rely on brake discs to achieve braking function during operation to prevent speed loss when lowering heavy objects. During the lowering stage, the operator pulls the chain, which drives the sprocket to rotate, thus lowering the heavy object. At this time, when it is necessary to stop lowering or control the lowering speed, the brake disc will contact the rotating parts and resist the rotation of the sprocket through friction. However, due to the frequent and high-intensity friction of the brake disc, especially when lowering heavy objects, the continuous relative motion between the brake disc and the rotating parts will generate a lot of heat, causing the brake disc temperature to rise sharply. When it exceeds the tolerance limit of the brake disc material, the material performance of the brake disc will deteriorate, with reduced hardness and toughness, ultimately causing the brake disc to fail, thus causing serious safety accidents and posing a great threat to the lives and property of operators. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a self-locking anti-detachment type safety lifting device for hand chain hoists, which aims to improve the problem of continuous relative motion between the brake disc and rotating parts in the prior art, which causes the brake disc temperature to rise sharply.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a self-locking, anti-detachment type hand chain hoist safety lifting device, including a hook, a rotating block rotatably connected to the bottom of the hook, a limiting disc rotatably connected to both the left and right sides of the outer wall of the rotating block, a feeding gear rotatably connected to the right side of the left limiting disc, a rotating gear fixedly connected to the right side of the feeding gear, a speed-changing gear rotatably connected to the left side of the outer wall of the right limiting disc, a hollow plate fixedly connected to the rear right side of the outer wall of the right limiting disc, meshing gears rotatably connected to both the upper and lower sides of the inner wall of the hollow plate, and the right side of the speed-changing gear penetrating the right limiting disc and connecting with the... The hollow plate is fixedly connected to the left side of the meshing gear at the top. A storage box is fixedly connected to the front right side of the limiting disc on the right side. The rear side of the outer wall of the storage box is connected to the hollow plate. A liquid outlet pipe is connected to the rear side of the hollow plate. The other end of the liquid outlet pipe is connected to a cooling ring. A drain pipe is connected to the front side of the cooling ring. The other end of the drain pipe is connected to the front side of the outer wall of the storage box. A feeding chain is meshed with the outer side of the rotating gear. A transmission assembly is provided on the left side of the limiting disc on the left side. A fixed replacement mechanism is provided at the bottom of the feeding chain. The fixed replacement mechanism is used to quickly replace different connecting hooks.

[0006] As a further description of the above technical solution:

[0007] The fixed replacement mechanism includes a C-shaped block, which is disposed at the bottom of the feeding chain. The top of the inner wall of the C-shaped block engages with the bottom of the feeding chain. A U-shaped block is fixedly connected to the bottom of the inner wall of the C-shaped block. A rotating block is rotatably connected to the inner wall of the U-shaped block. A threaded post is fixedly connected to the top of the rotating block. A fixing nut is fixedly connected to the top of the inner wall of the C-shaped block. An L-shaped hollow block is threadedly connected to the top of the outer wall of the threaded post. A hook is provided at the bottom of the C-shaped block, and the top of the hook engages with the bottom of the inner wall of the C-shaped block.

[0008] As a further description of the above technical solution:

[0009] The transmission assembly includes a compression spring, which is rotatably connected to the left side of the inner wall of a limiting disc fixedly connected to the left side. A brake disc is fixedly connected to the left side of the compression spring. Arc-shaped inclined blocks are fixedly connected to the front and rear sides of the outer wall of the brake disc. A limit pin is slidably connected to the inner wall of the feeding gear. The inner wall of the brake disc is fixedly connected to the outer wall of the limit pin. The outer wall of the limit pin passes through the limiting disc and is slidably connected to a pulling gear. Limit grooves are formed on the inner walls of both the feeding gear and the pulling gear. Both limit grooves engage with the outer wall of the limit pin. The right side of the pulling gear engages with the outer side of the arc-shaped inclined block. A shell is fixedly connected to the outer side of the limiting disc on the left side. A fixed disc is fixedly connected to the left side of the outer wall of the limit pin. A shaped gear is fixedly connected to the left side of the fixed disc. A locking block is rotatably connected to the inner wall of the shell. The outer side of the locking block engages with the outer wall of the shaped gear. A tension chain is meshed with the outer wall of the pulling gear. A waterproof coating is fixedly connected to the inner wall of the cooling ring.

[0010] As a further description of the above technical solution:

[0011] An observation window is provided on the front side of the outer wall of the storage box, and an outer frame is fixedly connected to the outer wall of the observation window.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the tension chain is provided with a slip ring sleeve, and the outer wall of the slip ring sleeve is provided with multiple anti-slip grooves.

[0014] As a further description of the above technical solution:

[0015] A temperature sensor is fixedly connected to the right side of the outer wall of the storage tank, and a water tank plug is threadedly connected to the top of the storage tank.

[0016] As a further description of the above technical solution:

[0017] A warning sign block is fixedly connected to the middle left side of the outer wall of the casing, and a nameplate is fixedly connected to the bottom left side of the outer wall of the casing.

[0018] As a further description of the above technical solution:

[0019] The inner wall size of the cooling ring is the same as the outer wall size of the brake disc, and the outer wall size of the meshing gear is the same as the inner wall size of the hollow plate.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the feeding gear drives the rotating gear, and the two rotate together. Through meshing with the speed-changing gear, the speed-changing gear rotates, and the speed-changing gear drives the meshing gear to rotate. Due to the tight meshing, the joint rotation generates suction force, which draws out the coolant from the storage tank and guides it into the cooling ring through the hollow plate and the outlet pipe. The cooling ring absorbs the heat above the brake disc and returns to the storage tank through the drain pipe, effectively reducing the temperature of the brake disc and preventing safety accidents caused by overheating failure.

[0022] 2. In this utility model, by rotating the fixing nut, the threaded column moves upward, passing the top of the L-shaped hollow block. Then, the threaded column and the rotating block are rotated to remove the C-shaped block and replace the hook. The C-shaped block of the new hook is hung back above the feeding chain. The threaded column and the rotating block are rotated again to make the threaded column snap into the L-shaped hollow block. Finally, the fixing nut is rotated downward to fix the threaded column and the rotating block, completing the replacement of the hook. Attached Figure Description

[0023] Figure 1 This is a perspective view of the self-locking anti-detachment type hand chain hoist safety lifting device proposed in this utility model;

[0024] Figure 2 This is a front view of the self-locking anti-detachment type hand chain hoist safety lifting device proposed in this utility model;

[0025] Figure 3 This is a side view of the self-locking anti-detachment type hand chain hoist safety lifting device proposed in this utility model;

[0026] Figure 4 This is an exploded view of the fixing plate of the self-locking anti-detachment type hand chain hoist safety lifting device proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the fixing and replacement mechanism of the self-locking anti-detachment type hand chain hoist safety lifting device proposed in this utility model.

[0028] Legend:

[0029] 1. Hook; 2. Fixing and changing mechanism; 201. C-shaped block; 202. U-shaped block; 203. Rotating block; 204. Threaded post; 205. Fixing nut; 206. L-shaped hollow block; 207. Hanging hook; 3. Rotating block; 4. Limiting disc; 5. Feeding gear; 6. Rotating gear; 7. Feeding chain; 8. Speed ​​change gear; 9. Hollow plate; 10. Meshing gear; 11. Storage tank; 12. Liquid outlet pipe; 13. Cooling ring; 14. 15. Drain pipe; 16. Compression spring; 17. Brake disc; 18. Pull gear; 19. Arc-shaped tilting block; 20. Limiting groove; 21. Limiting pin; 22. Irregular gear; 23. Locking block; 24. Fixing plate; 25. Outer shell; 26. Observation window; 27. Outer frame; 28. Tension chain; 29. ​​Slip ring sleeve; 30. Anti-slip groove; 31. Temperature sensor; 32. Warning sign block; 33. Nameplate; 34. Water tank plug; 35. Waterproof coating. Detailed Implementation

[0030] 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.

[0031] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of a self-locking, anti-detachment type hand chain hoist safety lifting device, including a hook 1. A rotating block 3 is rotatably connected to the bottom of the hook 1. A limiting disc 4 is rotatably connected to both the left and right sides of the outer wall of the rotating block 3. A feeding gear 5 is rotatably connected to the right side of the left limiting disc 4. A rotating gear 6 is fixedly connected to the right side of the feeding gear 5. A speed-changing gear 8 is rotatably connected to the left side of the outer wall of the right limiting disc 4. A hollow plate 9 is fixedly connected to the rear right side of the outer wall of the right limiting disc 4. Meshing gears 10 are rotatably connected to both the upper and lower sides of the inner wall of the hollow plate 9. The right side of the speed-changing gear 8 extends through the right side of the right limiting disc 4. The limiting disc 4 and the hollow plate 9 are fixedly connected to the left side of the top meshing gear 10. The right front end of the right limiting disc 4 is fixedly connected to the storage box 11. The rear side of the outer wall of the storage box 11 is connected to the hollow plate 9. The rear side of the hollow plate 9 is connected to the liquid outlet pipe 12. The other end of the liquid outlet pipe 12 is connected to the cooling ring 13. The front side of the cooling ring 13 is connected to the drain pipe 14. The other end of the drain pipe 14 is connected to the front side of the outer wall of the storage box 11. The outer side of the rotating gear 6 is meshed with the feeding chain 7. The left side of the left limiting disc 4 is provided with a transmission component. The bottom of the feeding chain 7 is provided with a fixed replacement mechanism. Mechanism 2, the fixed replacement mechanism 2 is used for quick replacement of different connecting hooks; the transmission assembly includes a compression spring 15, which is rotatably connected to the left side of the inner wall of the limiting disc 4, and a brake disc 16 is fixedly connected to the left side of the compression spring 15. Arc-shaped inclined blocks 18 are fixedly connected to the front and rear sides of the outer wall of the brake disc 16. A limit pin 20 is slidably connected to the inner wall of the feeding gear 5. The inner wall of the brake disc 16 is fixedly connected to the outer wall of the limit pin 20. The outer wall of the limit pin 20 penetrates the limiting disc 4 and is slidably connected to a pulling gear 17. The inner walls of the feeding gear 5 and the pulling gear 17 are connected... Each has a limiting groove 19, and both limiting grooves 19 engage with the outer wall of the limiting pin 20. The right side of the pulling gear 17 engages with the outer side of the arc-shaped inclined block 18. The outer side of the left limiting plate 4 is fixedly connected to the outer shell 24. The left side of the outer wall of the limiting pin 20 is fixedly connected to the fixing plate 23. The left side of the fixing plate 23 is fixedly connected to the irregular gear 21. The inner wall of the outer shell 24 is rotatably connected to the locking block 22. The outer side of the locking block 22 engages with the outer wall of the irregular gear 21. The outer wall of the pulling gear 17 is meshed with the tension chain 27. The inner wall of the cooling ring 13 is fixedly connected to the waterproof coating 34.

[0032] Specifically, hook 1 is hung above the moving device, and the transmission assembly controls the lifting and lowering of objects. When the device lifts a heavy object and moves it, and it needs to be lowered, the weight above the feeding chain 7 pulls the feeding gear 5 to rotate. The feeding gear 5 then drives the rotating gear 6 to rotate together. The rotating gear 6 meshes with the speed-changing gear 8, causing the speed-changing gear 8 to rotate. The speed-changing gear 8 then drives the meshing gear 10 to rotate together. Since the two meshing gears 10 are tightly meshed, they rotate together. The suction force generated draws the coolant from the storage tank 11 into the hollow plate 9 and into the outlet pipe 12. The outlet pipe 12 then directs the coolant into the cooling ring 13, which absorbs the heat above the brake disc 16. The coolant then returns to the storage tank 11 through the drain pipe 14, ensuring that the heat above the brake disc 16 is absorbed promptly, reducing the risk of brake disc 16 failure due to heat and potential safety accidents. Pulling the tension chain 27 rotates the pulling gear 17. When the pulling gear 17 rotates clockwise, the compression... Spring 15 pushes brake disc 16 and the upper arc-shaped inclined block 18 and pulling gear 17. At this time, the limiting pin 20 engages with the feeding gear 5, and the pulling gear 17 rotates clockwise, which drives the outer irregular gear 21 to rotate. When the irregular gear 21 rotates clockwise, the locking block 22 will not engage with it. When the irregular gear 21 rotates counterclockwise, the locking block 22 will engage with it, thus preventing the feeding gear 5 from rotating counterclockwise during pulling. When it is necessary to lower an object, the tension chain 27 is pulled counterclockwise, causing the pulling gear 17 to rotate counterclockwise. When the arc-shaped inclined block 18 pushes the brake disc 16 to stop pressing against the pulling gear 17, it will also cause the limiting pin 20 to stop engaging with the feeding gear 5. As a result, the feeding gear 5 will fall to the bottom under the action of the object's own weight. By controlling the degree of compression between the brake disc 16 and the pulling gear 17, the falling of the object can be controlled. At the same time, when the temperature changes, water vapor will be generated on the outside of the brake disc 16. At this time, the waterproof coating 34 can prevent water vapor from adhering to the top of the brake disc 16, thereby reducing the risk of rust and damage to the brake disc 16 caused by water vapor.

[0033] Reference Figure 1 , Figure 3 and Figure 5The fixed replacement mechanism 2 includes a C-shaped block 201, which is located at the bottom of the feeding chain 7. The top of the inner wall of the C-shaped block 201 is engaged with the bottom of the feeding chain 7. A U-shaped block 202 is fixedly connected to the bottom of the inner wall of the C-shaped block 201. A rotating block 203 is rotatably connected to the inner wall of the U-shaped block 202. A threaded post 204 is fixedly connected to the top of the rotating block 203. A fixing nut 205 is fixedly connected to the top of the inner wall of the C-shaped block 201. An L-shaped hollow block 206 is threadedly connected to the top of the outer wall of the threaded post 204. A hook 207 is provided at the bottom of the C-shaped block 201, and the top of the hook 207 is engaged with the bottom of the inner wall of the C-shaped block 201.

[0034] Specifically, when it is necessary to replace different hooks 207, simply rotate the fixing nut 205 so that it moves along the threaded post 204 to the top until it passes the top of the L-shaped hollow block 206. Then rotate the threaded post 204 so that it rotates together with the rotating block 203, thereby removing the C-shaped block 201 from above the feeding chain 7. To replace the required hook 207, hang the C-shaped block 201 above the hook 207 on the feeding chain 7, and rotate the threaded post 204 and the rotating block 203 so that the threaded post 204 engages in the L-shaped hollow block 206. Then rotate the fixing nut 205 so that it moves along the threaded post 204 to the bottom, thereby securing the threaded post 204 and the rotating block 203. This allows the hook 207 to be replaced as needed.

[0035] Reference Figure 1 , Figure 2 and Figure 3 An observation window 25 is provided on the front side of the outer wall of the storage box 11. The observation window 25 provides a clear view of the interior of the storage box 11. An outer frame 26 is fixedly connected to the outer wall of the observation window 25. The outer frame 26 provides a stable and reliable support to prevent the observation window 25 from being damaged or loosened due to external impact during daily use. A sliding ring sleeve 28 is provided on the outer wall of the tension chain 27. The sliding ring sleeve 28 can slide smoothly along the outer wall of the chain during the tensioning process, reducing unnecessary frictional resistance. Multiple anti-slip grooves 29 are provided on the outer wall of the sliding ring sleeve 28. The anti-slip grooves 29 can increase the friction between the operator's hand and the sliding ring sleeve 28.

[0036] Specifically, the observation window 25 provides a clear view of the interior of the storage box 11, and the outer frame 26 provides a stable and reliable support to prevent the observation window 25 from being damaged or loosened due to external impact during daily use. The sliding ring sleeve 28 allows the chain to slide smoothly along the outer wall of the chain 27 during the tensioning process, reducing unnecessary frictional resistance. Furthermore, the anti-slip groove 29 increases the friction between the operator's hand and the sliding ring sleeve 28.

[0037] Reference Figure 1 , Figure 3 and Figure 4 A temperature sensor 30 is fixedly connected to the right side of the outer wall of the storage tank 11. The temperature sensor 30 can detect the temperature changes inside the storage tank 11 and the surrounding environment. A water tank plug 33 is threadedly connected to the top of the storage tank 11, and the water tank plug 33 can be replaced and refilled with coolant. A warning sign block 31 is fixedly connected to the middle of the left side of the outer wall of the outer shell 24. The warning sign block 31 can remind operators to pay attention to the safe use of the equipment and avoid safety accidents caused by improper operation. A nameplate 32 is fixedly connected to the bottom left side of the outer wall of the outer shell 24. The nameplate 32 can indicate various aspects of the equipment. Key parameters: The inner wall size of the cooling ring 13 is the same as the outer wall size of the brake disc 16. The matching size of the cooling ring 13 and the brake disc 16 can quickly absorb the large amount of heat generated by the brake disc 16 during operation. The outer wall size of the meshing gear 10 is the same as the inner wall size of the hollow plate 9. The matching size of the meshing gear 10 and the hollow plate 9 can ensure that the gear rotates smoothly and steadily inside the hollow plate 9, effectively transferring coolant, while avoiding the problems of jamming and accelerated wear caused by size deviation, ensuring the efficient and stable operation of the entire equipment's transmission system.

[0038] Specifically, the temperature sensor 30 can detect temperature changes inside and around the storage tank 11, the coolant can be replaced and added via the water tank plug 33, the warning sign block 31 can remind operators to pay attention to the safe use of the equipment and avoid safety accidents caused by improper operation, and the nameplate 32 can mark various key parameters of the equipment. The cooling ring 13 is the same size as the brake disc 16, which can quickly absorb the large amount of heat generated by the brake disc 16 during operation. The meshing gear 10 is the same size as the hollow plate 9, which can ensure that the gear rotates smoothly and stably inside the hollow plate 9, effectively transferring coolant, while avoiding jamming and accelerated wear caused by size deviation, thus ensuring the efficient and stable operation of the entire transmission system of the equipment.

[0039] Working principle: The hook 1 is installed on the top of the mobile device. The transmission component controls the lifting of objects. After the device lifts the heavy object and moves it, if the object needs to be lowered, the heavy object will pull the feeding gear 5 to rotate through the feeding chain 7. The rotation of the feeding gear 5 will drive the rotating gear 6 to rotate synchronously. Through meshing with the speed change gear 8, the speed change gear 8 will rotate. The rotation of the speed change gear 8 will then drive the meshing gear 10 to rotate synchronously. Since the two meshing gears 10 are tightly meshed, they will rotate together and generate sufficient suction to draw out the coolant in the storage tank 11 and inject it into the hollow plate 9. The coolant is then guided to the cooling ring 13 through the outlet pipe 12. The cooling ring 13 absorbs the heat above the brake disc 16 and carries the heat back to the storage tank 11 through the drain pipe 14. This ensures that the heat above the brake disc 16 is absorbed in time, preventing the brake disc 16 from failing due to heat accumulation, thereby avoiding potential safety accidents.

[0040] Furthermore, through the fixed replacement mechanism 2, when it is necessary to replace the hook 207 with a different model, simply rotate the fixing nut 205 to move the fixing nut 205 upward along the threaded post 204 until it passes the top of the L-shaped hollow block 206. At this time, the threaded post 204 can be rotated together with the rotating block 203 to remove the C-shaped block 201 from above the feeding chain 7. Then, replace it with the required hook 207, and re-hook the C-shaped block 201 above the new hook 207 onto the feeding chain 7. After that, rotate the threaded post 204 and the rotating block 203 to embed the threaded post 204 into the L-shaped hollow block 206. Finally, rotate the fixing nut 205 to move it downward along the threaded post 204, thereby achieving a stable fixation of the threaded post 204 and the rotating block 203. Through the above steps, the hook 207 can be replaced as needed.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking, anti-detachment type safety lifting device for a hand chain hoist, comprising a hook (1), characterized in that: A rotating block (3) is rotatably connected to the bottom of the hook (1). A limiting disc (4) is rotatably connected to both the left and right sides of the outer wall of the rotating block (3). A feeding gear (5) is rotatably connected to the right side of the left limiting disc (4). A rotating gear (6) is fixedly connected to the right side of the feeding gear (5). A speed-changing gear (8) is rotatably connected to the left side of the outer wall of the right limiting disc (4). A hollow plate (9) is fixedly connected to the rear right side of the outer wall of the right limiting disc (4). A meshing gear (10) is rotatably connected to both the upper and lower sides of the inner wall of the hollow plate (9). The right side of the speed-changing gear (8) passes through the right limiting disc (4) and the hollow plate (9) and is fixedly connected to the left side of the top meshing gear (10). A storage box (11) is fixedly connected to the front right side of the limiting disc (4). The rear side of the outer wall of the storage box (11) is connected to the hollow plate (9). The rear side of the hollow plate (9) is connected to the liquid outlet pipe (12). The other end of the liquid outlet pipe (12) is connected to the cooling ring (13). The front side of the cooling ring (13) is connected to the drain pipe (14). The other end of the drain pipe (14) is connected to the front side of the outer wall of the storage box (11). The outer side of the rotating gear (6) is meshed with the feeding chain (7). A transmission component is provided on the left side of the limiting disc (4). A fixed replacement mechanism (2) is provided at the bottom of the feeding chain (7). The fixed replacement mechanism (2) is used to quickly replace different connecting hooks.

2. The self-locking anti-detachment type manual chain hoist safety lifting device according to claim 1, characterized in that: The fixed replacement mechanism (2) includes a C-shaped block (201), which is located at the bottom of the feeding chain (7). The top of the inner wall of the C-shaped block (201) engages with the bottom of the feeding chain (7). A U-shaped block (202) is fixedly connected to the bottom of the inner wall of the C-shaped block (201). A rotating block (203) is rotatably connected to the inner wall of the U-shaped block (202). A threaded column (204) is fixedly connected to the top of the rotating block (203). A fixing nut (205) is fixedly connected to the top of the inner wall of the C-shaped block (201). An L-shaped hollow block (206) is threadedly connected to the top of the outer wall of the threaded column (204). A hook (207) is provided at the bottom of the C-shaped block (201), and the top of the hook (207) engages with the bottom of the inner wall of the C-shaped block (201).

3. The self-locking anti-detachment type manual chain hoist safety lifting device according to claim 1, characterized in that: The transmission assembly includes a compression spring (15), which is rotatably connected to the left side of the inner wall of a limiting disc (4) fixedly connected to the left side. A brake disc (16) is fixedly connected to the left side of the compression spring (15). Arc-shaped inclined blocks (18) are fixedly connected to the front and rear sides of the outer wall of the brake disc (16). A limit pin (20) is slidably connected to the inner wall of the feeding gear (5). The inner wall of the brake disc (16) is fixedly connected to the outer wall of the limit pin (20). The outer wall of the limit pin (20) passes through the limiting disc (4) and is slidably connected to a pulling gear (17). Limit grooves (19) are opened on the inner walls of both the feeding gear (5) and the pulling gear (17). The limiting grooves (19) are engaged with the outer wall of the limiting pin (20), the right side of the pulling gear (17) is engaged with the outer side of the arc-shaped inclined block (18), the outer side of the limiting disk (4) on the left is fixedly connected to the outer shell (24), the left side of the outer wall of the limiting pin (20) is fixedly connected to the fixing disk (23), the left side of the fixing disk (23) is fixedly connected to the shaped gear (21), the inner wall of the outer shell (24) is rotatably connected to the locking block (22), the outer side of the locking block (22) is engaged with the outer wall of the shaped gear (21), the outer wall of the pulling gear (17) is meshed with the tension chain (27), and the inner wall of the cooling ring (13) is fixedly connected to the waterproof coating (34).

4. The self-locking anti-detachment type manual chain hoist safety lifting device according to claim 1, characterized in that: An observation window (25) is provided on the front side of the outer wall of the storage box (11), and an outer frame (26) is fixedly connected to the outer wall of the observation window (25).

5. The self-locking anti-detachment type manual chain hoist safety lifting device according to claim 3, characterized in that: The outer wall of the tension chain (27) is provided with a slip ring sleeve (28), and the outer wall of the slip ring sleeve (28) is provided with multiple anti-slip grooves (29).

6. The self-locking anti-detachment type manual chain hoist safety lifting device according to claim 1, characterized in that: A temperature sensor (30) is fixedly connected to the right side of the outer wall of the storage tank (11), and a water tank plug (33) is threadedly connected to the top of the storage tank (11).

7. The self-locking anti-detachment type manual chain hoist safety lifting device according to claim 3, characterized in that: A warning sign block (31) is fixedly connected to the middle left side of the outer wall of the outer casing (24), and a nameplate (32) is fixedly connected to the bottom left side of the outer wall of the outer casing (24).

8. The self-locking anti-detachment type manual chain hoist safety lifting device according to claim 3, characterized in that: The inner wall size of the cooling ring (13) is the same as the outer wall size of the brake disc (16), and the outer wall size of the meshing gear (10) is the same as the inner wall size of the hollow plate (9).

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