Adjustable electric hoist lifting hook anti-falling device
By designing an adjustable electric hoist hook anti-detachment device, and adopting a telescopic structure and pull rope assembly, the problem of hook detachment caused by inconsistent rope thickness was solved, thereby improving the stability and safety of the hook.
Patent Information
- Application Number
- CN202520574211.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Existing electric hoist hooks are prone to detachment during hoisting due to inconsistent rope thickness. Existing anti-detachment devices cannot effectively adapt to ropes of different thicknesses, resulting in repositioning failure.
An adjustable electric hoist hook anti-detachment device was designed, which adopts a telescopic rotating rod and torsion spring mechanism, combined with a limit block and pull rope assembly, to achieve adjustable rotating rod length, ensuring that the rope smoothly enters the hook and automatically resets.
It effectively prevents ropes from coming off the hook, adapts to ropes of different thicknesses, ensures the stability and safety of the hook, and improves the reliability of the lifting process.
Smart Images
Figure CN223823199U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to electric hoists, specifically an adjustable electric hoist hook anti-detachment device. Background Technology
[0002] Electric hoists are common lifting equipment, and their hooks are used for ropes and other devices to lift objects. Because electric hoists are mobile, the hooks may come undone during operation.
[0003] Currently, anti-disengagement devices involve installing a rotating rod at the opening of the hook to close the opening and prevent disengagement. However, ropes vary in thickness, and the rotating rod may be blocked by a thicker rope when resetting, preventing it from fully resetting and potentially causing disengagement. Utility Model Content
[0004] To address the shortcomings of the existing technology, this utility model provides an adjustable electric hoist hook anti-detachment device. This utility model features a telescopic rotating rod, which can adjust the length of the rotating rod to accommodate ropes of various thicknesses, facilitates resetting, and is easy to use.
[0005] To achieve the above technical objectives, this utility model adopts the following technical solution: an adjustable electric hoist hook anti-detachment device, comprising a connecting rod and a hook connected to each other, a telescopic stop rod hinged at the connection between the connecting rod and the hook, a limit block fixed to the inner wall of the free end of the hook, and a torsion spring provided at the root of the telescopic stop rod so that the telescopic stop rod always has an upward rotation tendency. The natural state of the telescopic stop rod is the extended state, and in the extended state, it contacts the limit block to form an anti-detachment structure; the telescopic stop rod is provided with a telescopic spring so that the telescopic stop rod can retract when it is opened.
[0006] The telescopic stop also includes a rotating rod and a sleeve. The telescopic spring is located inside the sleeve, with one end fixed inside the sleeve and the other end fixed to the rotating rod extending into the sleeve, so that the sleeve can extend and retract. The other end of the rotating rod is hinged to the connection between the connecting rod and the hook.
[0007] The sleeve is also provided with a guide groove, and a guide block is provided at the end of the rotating rod that extends into the sleeve. The guide block is located in the guide groove.
[0008] The connecting rod is also provided with a pull rope assembly, which includes a tension spring disposed inside the connecting rod. The tension spring is fixedly connected to a steel wire rope, which passes through the connecting rod and is fixed to the sleeve.
[0009] The connecting rod has a movable groove inside. The upper end of the tension spring is fixed to the movable groove, and the lower end is fixed to a guide plate. The guide plate is connected to the wire rope. The movable groove also has a through hole to connect the inside and outside. The wire rope passes through the through hole.
[0010] The sleeve is provided with a first lifting ring and a second lifting ring, which are respectively located at both ends of the sleeve. The wire rope passes through the second lifting ring and is then fixed to the first lifting ring.
[0011] In summary, this utility model achieves the following technical effects:
[0012] This utility model features a hinged telescopic stop bar that allows it to rotate inward to open an opening, enabling the rope to be hoisted into the hook. A torsion spring ensures the telescopic stop bar automatically returns to its original position, while a limiting block restricts its position and ensures the opening remains closed, preventing the rope from slipping off the hook. Furthermore, the telescopic stop bar is telescopic, with a telescopic spring that automatically returns to its original position. It extends and retracts during rotation; if the rope to be hoisted is too thick, the telescopic stop bar can retract to avoid obstructing the rope, facilitating its return to its original position and preventing the rope from being blocked. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of an adjustable electric hoist hook anti-detachment device;
[0014] Figure 2 yes Figure 1 A partial cross-sectional schematic diagram;
[0015] Figure 3 yes Figure 2 Enlarged view of a portion;
[0016] Figure 4 yes Figure 1 A schematic diagram of the addition of a pull rope assembly;
[0017] Figure 5 yes Figure 4 A partial cross-sectional schematic diagram;
[0018] Figure 6 This is a diagram showing the telescopic lever rotated downwards to its maximum position. Detailed Implementation
[0019] The present invention will be further described in detail below with reference to the accompanying drawings.
[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0025] Example:
[0026] Figure 1This is a schematic diagram of an adjustable electric hoist hook anti-detachment device, including a connecting rod 1 and a hook 2 connected to each other. The connecting rod 1 is connected to the electric hoist body. A telescopic stop is hinged at the connection between the connecting rod 1 and the hook 2. A limit block 21 is fixed to the inner wall of the free end of the hook 2. A torsion spring 6 is also provided at the root of the telescopic stop, so that the telescopic stop always has an upward rotation tendency. The natural state of the telescopic stop is the extended state, and in the extended state, it contacts the limit block 21 to form an anti-detachment structure. A telescopic spring 33 is provided inside the telescopic stop, so that the telescopic stop can retract when it is in the opened state.
[0027] This utility model features a hinged telescopic stop bar that allows it to rotate inward to open an opening, enabling the rope to be hoisted into the hook. A torsion spring ensures the telescopic stop bar automatically returns to its original position, while a limiting block restricts its position and ensures the opening remains closed, preventing the rope from slipping off the hook. Furthermore, the telescopic stop bar is adjustable in length, and the telescopic spring ensures automatic return. It extends and retracts during rotation; if the rope to be hoisted is too thick, the telescopic stop bar can retract to avoid obstructing the rope, facilitating its return to its original position and preventing the rope from being blocked.
[0028] Figure 2 yes Figure 1 A partial cross-sectional schematic diagram, Figure 3 yes Figure 2 A partially enlarged schematic diagram shows that the telescopic stop also includes a rotating rod 31 and a sleeve 32. The telescopic spring 33 is located inside the sleeve 32, with one end fixed inside the sleeve 32 and the other end fixed to the rotating rod 31 extending into the sleeve 32, so that the sleeve 32 can extend and retract. The other end of the rotating rod 31 is hinged to the connection between the connecting rod 1 and the hook 2.
[0029] The sleeve 32 is also provided with a guide groove 34 inside, and the rotating rod 31 extends to the end of the sleeve 32 and is provided with a guide block 35, which is located in the guide groove 34.
[0030] The structure of this utility model features a sleeve that can extend and retract. The telescopic spring ensures that the sleeve always tends to extend, thus abutting against the free end of the hook and being blocked by the limiting block to seal the opening and prevent it from coming off the hook.
[0031] Figure 4 yes Figure 1 A schematic diagram of the addition of a pull rope assembly. Figure 5 yes Figure 4 A partial cross-sectional schematic diagram shows that the connecting rod 1 is also provided with a pull rope assembly, which includes a tension spring 4 disposed inside the connecting rod 1. The tension spring 4 is fixedly connected to a steel wire rope 7, which passes through the connecting rod 1 and is fixed to the sleeve 32.
[0032] This utility model is equipped with a pull rope assembly, which can provide an upward pulling force to the telescopic stop bar from above, preventing the telescopic stop bar from drooping and causing the opening to come off the hook. Together with the force of the torsion spring, it ensures the stability of the telescopic stop bar sealing.
[0033] The connecting rod 1 has a movable groove 11 inside. The upper end of the tension spring 4 is fixed to the movable groove 11, and the lower end is fixed to the guide plate 5. The guide plate 5 is connected to the wire rope 7. The movable groove 11 also has a through hole 12 to connect the inside and outside. The wire rope 7 passes through the through hole 12.
[0034] The sleeve 32 is provided with a first lifting ring 36 and a second lifting ring 37, which are respectively located at both ends of the sleeve 32. The wire rope 7 passes through the second lifting ring 37 and is fixed to the first lifting ring 36.
[0035] When the telescopic lever turns downward, under the tension of the pull rope 7, the sleeve 32, in addition to its rotational motion, is also pulled upward by the pull rope 7, thus retracting the sleeve 32 and reducing the total length of the telescopic lever to avoid the rope to be hoisted. At this time, the tension spring 4 is pulled down to release the pull rope a certain distance. Figure 6 This is a diagram showing the telescopic lever rotated downwards to its maximum position. However, in practice, it doesn't need to be rotated to this extent; rotating it to about 60° is sufficient for rope installation. Rotating it to its maximum position might cause the torsion spring to interfere with the rope, while rotating it to about 60° will not. Even if the torsion spring interferes with the rope, it can be manually adjusted. After releasing the telescopic lever, under the action of the tension spring 4 and the telescopic spring 33, the telescopic lever extends and returns to its original position.
[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.
Claims
1. An adjustable electric hoist hook anti-derailment device, comprising a connecting rod (1) and a hook (2) connected to each other, characterized in that: A telescopic stop is hinged at the connection between the connecting rod (1) and the hook (2). A limit block (21) is fixed to the inner wall of the free end of the hook (2). A torsion spring (6) is also provided at the root of the telescopic stop so that the telescopic stop always has an upward rotation tendency. The natural state of the telescopic stop is the extended state, and it contacts the limit block (21) in the extended state to form an anti-detachment structure. A telescopic spring (33) is provided inside the telescopic stop so that the telescopic stop can retract when it is opened.
2. The adjustable electric hoist hook anti-detachment device according to claim 1, characterized in that: The telescopic stop also includes a rotating rod (31) and a sleeve (32). The telescopic spring (33) is located inside the sleeve (32) and one end is fixed inside the sleeve (32), and the other end is fixed to the rotating rod (31) extending into the sleeve (32), so that the sleeve (32) can extend and retract. The other end of the rotating rod (31) is hinged to the connection between the connecting rod (1) and the hook (2).
3. The adjustable electric hoist hook anti-detachment device according to claim 2, characterized in that: The sleeve (32) is also provided with a guide groove (34), and the end of the rotating rod (31) extending into the sleeve (32) is provided with a guide block (35), which is located in the guide groove (34).
4. The adjustable electric hoist hook anti-detachment device according to claim 2, characterized in that: The connecting rod (1) is also provided with a pull rope assembly, which includes a tension spring (4) disposed in the connecting rod (1), and a steel wire rope (7) is fixedly connected to the tension spring (4). The steel wire rope (7) passes through the connecting rod (1) and is fixed to the sleeve (32).
5. The adjustable electric hoist hook anti-derailment device according to claim 4, characterized in that: The connecting rod (1) has a movable groove (11) inside. The upper end of the tension spring (4) is fixed to the movable groove (11), and the lower end is fixed to a guide plate (5). The guide plate (5) is connected to the wire rope (7). The movable groove (11) also has a through hole (12) to connect the inside and outside. The wire rope (7) passes through the through hole (12).
6. The adjustable electric hoist hook anti-derailment device according to claim 5, characterized in that: The sleeve (32) is provided with a first lifting ring (36) and a second lifting ring (37), which are respectively located at both ends of the sleeve (32). The wire rope (7) passes through the second lifting ring (37) and is fixed to the first lifting ring (36).