Mechanical automatic uncoupling device

Abstract

The utility model discloses a mechanical automatic unhooking device relates to crane technical field, including the hook body, the hook body one end is equipped with the fixed tube, the fixed tube middle part is equipped with the fixed pin, the fixed pin is connected fixedly with the counterweight end portion mounting hole, the fixed tube is hingedly equipped with the connecting rod, the other end of connecting rod is hingedly connected with the pull rod one end, the pull rod is slid in the counterweight upper end sliding hole, the hook body one side is equipped with the protection mechanism, the utility model discloses the hook body is hingedly connected with the counterweight, and the pull rod slides in the counterweight inside, and the pull rod end portion is hingedly connected with the hook body end portion fixed tube through the connecting rod, makes when hoisting and unhooking, the hook body rotates fixed angle, and moves through the external traction component and drives the counterweight, and then completes automatic unhooking.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a mechanical automatic unhooking device. Background Technology

[0002] Cranes, as key equipment capable of vertical lifting and horizontal movement of heavy objects, are indispensable mechanical devices in modern industrial production and construction activities. Their applications are extremely wide, found in various scenarios such as construction sites, ports, large factory workshops, and logistics warehouses, greatly improving the efficiency and capacity of material handling. As a crucial component of the crane that directly bears and connects the load, the performance and reliability of the hook directly affect the safety and efficiency of the entire lifting operation.

[0003] However, in current lifting operations, the connection and disconnection of the hook from the load still heavily relies on manual labor. Operators need to be in close proximity to the suspended, often enormous and heavy load, directly manipulating it by hand or using auxiliary tools to guide the hook into or out of the lifting point. This process carries significant safety risks when handling large, heavy components or equipment. Unexpected swaying of the load, sudden slippage of the slings, or operator misjudgment can all lead to serious injuries such as crushing, impacts, or falling loads, directly threatening the personal safety of operators. This operation mode, dependent on direct human intervention, not only presents significant safety hazards but also affects the stability of operational efficiency due to the high skill and experience required of the operators.

[0004] Based on this, a mechanical automatic unhooking device is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a mechanical automatic unhooking device to solve the problem in the prior art of inconvenience in automatically unhooking the hook from the load.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automatic mechanical unhooking device includes a hook body, a fixed tube fixedly mounted at one end of the hook body, a fixed pin rotatably mounted in the middle of the fixed tube, the fixed pin being fixedly connected to a mounting hole at the end of a counterweight, connecting pulleys symmetrically mounted on the upper end of the counterweight, a connecting rod hinged to the fixed tube, the other end of the connecting rod being hinged to one end of a pull rod, the pull rod being slidably mounted in a sliding hole at the upper end of the counterweight, a fixed plate fixedly mounted on the pull rod, a mounting groove provided inside the counterweight at the position of the fixed plate, a first return spring provided between the upper end of the fixed plate and the end of the mounting groove, and a protective mechanism provided on one side of the hook body to prevent the load from falling during operation.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative embodiment: the protective mechanism includes a protective baffle, which is hinged in a hinge hole at one end of a fixed frame. The fixed frame is fixed to the end of the hook body. Connecting discs are fixed at the ends of the rotating shafts at both ends of the protective baffle. A torsion spring is provided between one side of the connecting disc and one side of the fixed frame. A connecting pipe is fixed between one side of the fixed frame and the rotating shaft of the protective baffle. One side of the protective baffle is in close contact with one end of a pushing frame. The pushing frame is slidably disposed inside the fixed frame. The pushing frame is fixed at one end of a first sliding rod. The first sliding rod is fixed at one side of a second piston plate. The second piston plate is slidably disposed inside a second hydraulic cylinder. A third return spring is provided between one side of the second piston plate and one end of the second hydraulic cylinder. The second hydraulic cylinder is fixed in a mounting hole at the end of the hook body.

[0010] In one alternative: one end of the second hydraulic cylinder is connected to an oil supply pipe, which is closely attached to the outside of the hook body. The other end of the oil supply pipe is connected to a first hydraulic cylinder, which is fixedly mounted at the bottom of the hook body. A first piston plate is slidably mounted inside the first hydraulic cylinder. The first piston plate is fixedly mounted at one end of a second sliding rod, and the other end of the second sliding rod is fixedly mounted on a push plate. The push plate is fitted into a receiving groove inside the hook body. A second return spring is provided between the bottom end of the push plate and one end of the first hydraulic cylinder. The connecting pulley is connected to an external traction component.

[0011] In one alternative: one end of the pusher is provided with a roller.

[0012] In one alternative: a stop hole is provided on the outside of the fixed tube, a stop frame is inserted into the stop hole, the stop frame is slidably disposed inside the fixed tube, the fixed tube is fixedly disposed on the counterweight, a tension spring is provided between one side of the stop frame and one end of the fixed tube, and a lever plate is closely attached to the other end of the stop frame, the lever plate is fixedly disposed at one end of the protective baffle.

[0013] In one alternative: a hinge seat is fixedly provided at one end of the pull rod, and a pull rope is fixedly provided at one end of the hinge seat, the pull rope being connected to an external winch component.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention features a hook body hinged to a counterweight, with a pull rod sliding inside the counterweight. The end of the pull rod is hinged to a fixed tube at the end of the hook body via a connecting rod. This allows the hook body to rotate at a fixed angle during lifting and unhooking, and the counterweight to move via an external traction component, thus achieving automatic unhooking. A protective mechanism is also included, allowing the load's weight to press against the push plate. A protective baffle seals one end of the hook body, preventing the load from falling during operation. Furthermore, the protective baffle's rotation pushes a stop frame to slide, inserting it into a stop groove to secure the hook body. This enhances the practicality of the automatic mechanical unhooking device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the installation of the oil pipeline of this utility model.

[0018] Figure 3 This is a schematic diagram of the tie rod structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the first and second oil cylinders of this utility model.

[0020] Figure 5 This is a schematic diagram of the fixed tube and stop frame structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the pusher and stopper structure of this utility model.

[0022] Figure reference numerals: 11 Hook body, 12 Fixing pipe, 13 Counterweight, 14 Connecting pulley, 15 Connecting rod, 16 Pull rod, 17 First return spring, 18 Pull rope, 19 Push plate, 20 Second return spring, 21 First cylinder, 22 First piston plate, 23 Oil pipe, 24 Second cylinder, 25 Second piston plate, 26 Third return spring, 27 Push frame, 28 Protective baffle, 29 Fixing frame, 30 Torsion spring, 31 Connecting pipe, 32 Paddle plate, 33 Stop frame, 34 Tension spring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In one embodiment, such as Figures 1-6As shown, a mechanical automatic unhooking device includes a hook body 11. A fixing tube 12 is fixedly provided at one end of the hook body 11. A fixing pin is rotatably provided in the middle of the fixing tube 12. The fixing pin is fixedly connected to the mounting hole at the end of the counterweight block 13. Connecting pulleys 14 are symmetrically provided at the upper end of the counterweight block 13. A connecting rod 15 is hinged to the fixing tube 12. The other end of the connecting rod 15 is hinged to one end of a pull rod 16. The pull rod 16 is slidably disposed in the sliding hole at the upper end of the counterweight block 13. A fixing plate is fixedly provided on the pull rod 16. A mounting groove is provided inside the counterweight block 13 at the position of the fixing plate. A first return spring 17 is provided between the upper end of the fixing plate and the end of the mounting groove. A protective mechanism is provided on one side of the hook body 11 to prevent the load from falling during operation. The protective mechanism facilitates the closure of the end of the hook body 11 during operation.

[0025] The protective mechanism includes a protective baffle 28, which is hinged in a hinge hole at one end of a fixed frame 29. The fixed frame 29 is fixed to the end of the hook body 11. Connecting discs are fixed at the ends of the rotating shafts at both ends of the protective baffle 28. Torsion springs 30 are provided between one side of the connecting disc and one side of the fixed frame 29. Connecting pipes 31 are fixed between one side of the fixed frame 29 and the rotating shaft of the protective baffle 28. One side of the protective baffle 28 is in close contact with one end of a pushing frame 27. The pushing frame 27 is slidably disposed inside the fixed frame 29. The pushing frame 27 is fixed at one end of a first sliding rod. The first sliding rod is fixed at one side of a second piston plate 25. The second piston plate 25 is slidably disposed inside a second hydraulic cylinder 24. A third return spring 26 is provided between one side of the second piston plate 25 and one end of the second hydraulic cylinder 24. The second hydraulic cylinder 24 is fixed in a mounting hole at the end of the hook body 11.

[0026] One end of the second hydraulic cylinder 24 is connected to an oil supply pipe 23, which is closely attached to the outside of the hook body 11. The other end of the oil supply pipe 23 is connected to a first hydraulic cylinder 21, which is fixedly mounted at the bottom of the hook body 11. A first piston plate 22 is slidably mounted inside the first hydraulic cylinder 21. The first piston plate 22 is fixedly mounted at one end of a second sliding rod, and the other end of the second sliding rod is fixedly mounted on a push plate 19. The push plate 19 is fitted into a receiving groove inside the hook body 11. A second return spring 20 is provided between the bottom end of the push plate 19 and one end of the first hydraulic cylinder 21. The connecting pulley 14 is connected to an external traction component. In use, when it is necessary to lift a load, the pull rod 16 is pulled. The pull rod 16 drives the fixed pipe 12 to rotate through the connecting rod 15. Pipe 12 drives the hook body 11 to rotate. Then, the external traction component drives the hook body 11 to move through the counterweight 13. The hook body 11 lifts the load. Then, the pull rope 18 pushes the hook body 11 to the initial position, and the hook body 11 rises. The load squeezes the push plate 19, and the push plate 19 slides into the inner storage groove of the hook body 11. At the same time, the push plate 19 pushes the first piston plate 22 to slide through the second sliding rod, so that the hydraulic oil inside the first cylinder 21 enters the second cylinder 24 through the oil supply pipe 23. The hydraulic oil pushes the second piston plate 25 to slide inside the second cylinder 24. The first sliding rod drives the push frame 27 to move. One end of the push frame 27 pushes the protective baffle 28 to rotate, so that one end of the protective baffle 28 is in close contact with the end of the hook body 11, thereby preventing the load from falling during lifting.

[0027] The pusher 27 is equipped with a roller at one end, which helps to reduce wear between one end of the pusher 27 and one side of the protective baffle 28 during use.

[0028] The fixed tube 12 has a stop hole on its outer side, and a stop bracket 33 is inserted into the stop hole. The stop bracket 33 is slidably disposed inside the fixed tube. The fixed tube is fixedly disposed on the counterweight 13. A tension spring 34 is disposed between one side of the stop bracket 33 and one end of the fixed tube. The other end of the stop bracket 33 is closely attached to a lever plate 32. The lever plate 32 is fixedly disposed at one end of the protective baffle 28. In use, when the protective baffle 28 rotates, the protective baffle 28 drives the lever plate 32 to rotate. The lever plate 32 moves the stop bracket 33 to slide, so that the stop bracket 33 is inserted into the stop hole, thereby fixing the hook body 11.

[0029] A hinge seat is fixedly provided at one end of the pull rod 16, and a pull rope 18 is fixedly provided at the other end of the hinge seat. The pull rope 18 is connected to an external winch component. In use, the counterweight 13 is moved by connecting pulley 14 and external traction component to lift the load. At the same time, the external winch component winds up or unwinds the pull rope 18, thereby causing the hinge seat and the counterweight 13 to move synchronously. When it is necessary to automatically unhook the hook body 11 from the load, the load is pressed against the ground, and the push plate 19 no longer bears the weight. Under the action of the second return spring 20, the push plate 19 returns to the initial position, the hydraulic oil inside the second cylinder 24 flows back to the first cylinder 21, and under the action of the torsion spring 30, the protective baffle 28 moves away from the end of the hook body 11. Then the external winch component winds up the pull rope 18, causing the pull rope 18 to pull the pull rod 16 to slide. The pull rod 16 drives the fixed tube 12 to rotate through the connecting rod 15, and the fixed tube 12 drives the hook body 11 to rotate, thus completing the automatic unhooking between the hook body 11 and the load.

[0030] The above embodiment discloses a mechanical automatic unhooking device, wherein, when a load needs to be lifted, the external winch component winds up the pull rope 18, the pull rope 18 pulls the pull rod 16, the pull rod 16 drives the fixed tube 12 to rotate through the connecting rod 15, the fixed tube 12 drives the hook body 11 to rotate, and then the external traction component drives the hook body 11 to move through the counterweight 13, the hook body 11 lifts the load, then the pull rope 18 pushes to the initial position, the hook body 11 rises, the load squeezes the push plate 19, the push plate 19 slides into the inner storage groove of the hook body 11, and at the same time the push plate 19 is pushed by the second sliding rod. The first piston plate 22 slides, allowing the hydraulic oil inside the first cylinder 21 to enter the second cylinder 24 through the oil supply pipe 23. The hydraulic oil pushes the second piston plate 25 to slide inside the second cylinder 24. The first sliding rod drives the pusher 27 to move. One end of the pusher 27 pushes the protective baffle 28 to rotate, so that one end of the protective baffle 28 is in close contact with the end of the hook body 11, thereby preventing the load from falling during lifting. At the same time, when the protective baffle 28 rotates, it drives the lever 32 to rotate. The lever 32 moves the stop bracket 33 to slide, so that the stop bracket 33 is inserted into the stop hole, thereby fixing the hook body 11.

[0031] When the hook body 11 is automatically unhooked from the load, the load is pressed against the ground, and the push plate 19 no longer bears the weight. Under the action of the second return spring 20, the push plate 19 returns to the initial position. The hydraulic oil inside the second cylinder 24 flows back to the first cylinder 21. Under the action of the torsion spring 30, the protective baffle 28 moves away from the end of the hook body 11. Then, the external winch component winds up the pull rope 18, causing the pull rope 18 to pull the pull rod 16 to slide. The pull rod 16 drives the fixed tube 12 to rotate through the connecting rod 15. The fixed tube 12 drives the hook body 11 to rotate, thus completing the automatic unhooking between the hook body 11 and the load.

[0032] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A mechanical automatic unhooking device, comprising a hook body (11), wherein a fixing tube (12) is fixedly provided at one end of the hook body (11), a fixing pin is rotatably provided in the middle of the fixing tube (12), the fixing pin is fixedly connected to the mounting hole at the end of a counterweight (13), and connecting pulleys (14) are symmetrically provided at the upper end of the counterweight (13), characterized in that, A connecting rod (15) is hinged to the fixed tube (12), and the other end of the connecting rod (15) is hinged to one end of the pull rod (16). The pull rod (16) is slidably disposed in the sliding hole at the upper end of the counterweight (13). A fixed plate is fixedly disposed on the pull rod (16). An installation groove is provided inside the counterweight (13) at the position of the fixed plate. A first return spring (17) is provided between the upper end of the fixed plate and the end of the installation groove. A protective mechanism is provided on one side of the hook body (11) to prevent the load from falling during operation.

2. The automatic mechanical unhooking device according to claim 1, characterized in that, The protective mechanism includes a protective baffle (28), which is hinged in a hinge hole at one end of a fixed frame (29). The fixed frame (29) is fixed to the end of the hook body (11). Connecting discs are fixed at the ends of the rotating shafts at both ends of the protective baffle (28). Torsion springs (30) are provided between one side of the connecting disc and one side of the fixed frame (29). Connecting pipes (31) are fixed at one side of the fixed frame (29) and the rotating shaft of the protective baffle (28). The pusher (27) is closely attached to one end of the pusher (27), and the pusher (27) is slidably disposed inside the fixed frame (29). The pusher (27) is fixedly disposed at one end of the first sliding rod. The first sliding rod is fixedly disposed on one side of the second piston plate (25). The second piston plate (25) is slidably disposed inside the second oil cylinder (24). A third return spring (26) is provided between one side of the second piston plate (25) and one end of the second oil cylinder (24). The second oil cylinder (24) is fixedly disposed in the mounting hole at the end of the hook body (11).

3. The automatic mechanical unhooking device according to claim 2, characterized in that, One end of the second oil cylinder (24) is connected to an oil supply pipe (23), which is closely attached to the outside of the hook body (11). The other end of the oil supply pipe (23) is connected to a first oil cylinder (21), which is fixedly mounted on the bottom end of the hook body (11). A first piston plate (22) is slidably mounted inside the first oil cylinder (21). The first piston plate (22) is fixedly mounted on one end of a second sliding rod, and the other end of the second sliding rod is fixedly mounted on a push plate (19). The push plate (19) is fitted into the inner storage groove of the hook body (11). A second return spring (20) is provided between the bottom end of the push plate (19) and one end of the first oil cylinder (21). The connecting pulley (14) is connected to an external traction component.

4. The automatic mechanical unhooking device according to claim 3, characterized in that, The pusher (27) is equipped with a roller at one end.

5. The automatic mechanical unhooking device according to claim 4, characterized in that, The fixed tube (12) has a stop hole on its outer side, and a stop bracket (33) is inserted into the stop hole. The stop bracket (33) is slidably disposed inside the fixed tube. The fixed tube is fixedly disposed on the counterweight (13). A tension spring (34) is provided between one side of the stop bracket (33) and one end of the fixed tube. A lever plate (32) is closely attached to the other end of the stop bracket (33). The lever plate (32) is fixedly disposed at one end of the protective baffle (28).

6. The automatic mechanical unhooking device according to claim 5, characterized in that, The pull rod (16) is fixedly provided with a hinge seat at one end, and a pull rope (18) is fixedly provided at one end of the hinge seat. The pull rope (18) is connected to the external winch component.

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