Integrated self-locking anti-unhooking device for travelling crane
By designing an integrated self-locking anti-disengagement device for the crane, which combines the angle between the concave arc plate and the vertical plate with the eccentric hammer block and the anti-loosening disc spring, the problems of easy deformation and poor adaptability of existing anti-disengagement devices under dynamic loads are solved, and stable self-locking of the lifting rope and safe hoisting are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING GEOENVIRON ENG & TECH INC
- Filing Date
- 2025-05-21
- Publication Date
- 2026-04-21
AI Technical Summary
Existing spring-driven anti-disengagement devices are prone to plastic deformation under dynamic loads, resulting in a decrease in locking force. They cannot adapt to changes in rope diameter and lack redundant protection, leading to high structural failure risk, poor adaptability to various scenarios, and high maintenance costs.
Design a self-locking anti-disengagement device for cranes. By using the angle design of the concave arc plate and the vertical plate, combined with the eccentric hammer block and the anti-loosening disc spring, the self-locking function is achieved to prevent the hoisting rope from disengaging and to ensure safety and stability.
It achieves stability and safety of self-locking function under dynamic load, avoids rope detachment, ensures the convenience and safety of hoisting operations, and reduces maintenance costs.
Smart Images
Figure CN224147543U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of hook devices, and in particular to a self-locking anti-disengagement device integrated with a crane. Background Technology
[0002] In the field of industrial hoisting, anti-disengagement devices are core components for ensuring the safety of lifting operations. Currently, spring-driven anti-disengagement devices are widely used due to their simple structure and low cost. However, their technical defects lead to frequent safety hazards:
[0003] Mechanical structural defects: As the core locking element, the spring is prone to plastic deformation under dynamic loads, which leads to a decrease in locking force. When the diameter of the hoisting rope exceeds the design value, the probability of slippage increases significantly.
[0004] Functional adaptability defects: For large rope diameter working conditions, the existing spring device cannot adapt to changes in rope diameter through elastic deformation due to the fixed hook cavity structure. This results in a reduction in the contact area between the rope and the buckle, which exacerbates wear and the accumulation of impact loads.
[0005] Safety redundancy defect: The single spring locking mechanism lacks secondary protection. Once the spring fails, the anti-disengagement function is completely lost, which contradicts the redundancy design principle required by the current safety standards for lifting machinery.
[0006] To address the above problems, existing technologies attempt to improve them through the following solutions:
[0007] Double hook linkage structure: Safety is improved by adding redundant hooks, but double the installation space is required, which conflicts with the spatial layout of existing crane hook groups and results in high on-site modification costs.
[0008] Electromagnetic adsorption anti-loosening device: It uses electromagnetic force to assist in locking, but it requires a continuous external power supply. Moreover, the heating of the electromagnet coil causes the hook body to deform thermally, which directly affects the rope diameter compatibility and has a low applicability in actual working conditions.
[0009] The aforementioned technical deficiencies result in three major industry pain points for current anti-disengagement devices: high risk of structural failure, poor adaptability to various scenarios, and escalating maintenance costs. Therefore, there is an urgent need to develop a new type of anti-disengagement device that requires no external power supply, possesses adaptive rope diameter compensation capabilities, and meets dynamic load redundancy requirements. Utility Model Content
[0010] In view of the technical problems existing in the background art, this utility model patent provides a self-locking anti-disengagement device integrated with a crane, which realizes the self-locking function through structural design to prevent the crane equipment from disengaging when hoisting materials and ensure the safety of the crane equipment when hoisting materials.
[0011] To achieve the above objectives, the technical solution of this utility model is as follows:
[0012] A crane-integrated self-locking anti-disengagement device includes a hook body and two anti-disengagement connecting plates symmetrically arranged on both sides;
[0013] The anti-detachment hook connecting plate includes an integrally connected concave arc plate and a vertical plate. The concave arc plate and the vertical plate are designed with an included angle. The rear end of the hook body is connected through the middle of the two anti-detachment hook connecting plates, so that the concave arc plate is located between the front end and the rear end of the hook body, and the vertical plates of the two anti-detachment hook connecting plates are located on the outer side of the rear end of the hook body.
[0014] The front ends of the concave arc-shaped plates of the two anti-detachment connecting plates are connected by a front pin, and the front pin abuts against the front end of the hook body in the normal state.
[0015] An eccentric hammer block is connected between the rear ends of the vertical plates of the two anti-disengagement connecting plates. Under normal conditions, the end of the eccentric hammer block abuts against the outer side of the rear end of the hook body.
[0016] As a further improvement of this utility model, the included angle between the concave arc plate and the vertical plate of the anti-detachment connecting plate is set to 90°~120°.
[0017] As a further improvement of this utility model, the front end of the concave arc plate of the anti-detachment hook connecting plate is provided with a first connecting pin hole, and the front pin shaft passes through the first connecting pin holes of the two anti-detachment hook connecting plates to connect the front ends of the concave arc plates of the two anti-detachment hook connecting plates together.
[0018] As a further improvement of this utility model, both sides of the first connecting pin holes of the two anti-detachment connecting plates are connected to the front pin shaft by self-locking bolts.
[0019] As a further improvement of this utility model, the concave arc plate of the anti-detachment connecting plate is provided with a second connecting pin hole at the connection position with the vertical plate, and the rear end of the hook body is connected to the two anti-detachment connecting plates through the second connecting pin holes of the two anti-detachment connecting plates.
[0020] As a further improvement of this utility model, the hook body and the two anti-disengagement connecting plates are connected through the hook pin shaft.
[0021] As a further improvement of this utility model, an anti-loosening disc spring is provided at the connection between the hook body and the two anti-loosening connecting plates.
[0022] As a further improvement of this utility model, the rear end of the vertical plate of the anti-detachment connecting plate is provided with a third connecting pin hole, and an eccentric hammer block is set and connected between the third connecting pin holes of the two anti-detachment connecting plates.
[0023] As a further improvement of this utility model, the anti-detachment hook connecting plate and the eccentric hammer block are connected through the rear end pin, and anti-loosening bolts are provided on the rear end pin on the outer side of the two anti-detachment hook connecting plates.
[0024] As a further improvement of this utility model, the straight length of the concave arc plate is greater than the distance from the connection point of the hook body and the anti-disengagement connecting plate to the inner wall of the tip of the hook body, and less than the distance from the connection point of the hook body and the anti-disengagement connecting plate to the inner wall of any position at the bottom of the hook body.
[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0026] This utility model features a front pin that self-locks with the front end of the hook body, ensuring that the hook's rope diameter is only related to the hook body's design structure. This means the anti-disengagement device does not interfere with the hook's rope diameter. After the front pin self-locks with the front end of the hook body, two concave arc-shaped plates confine the material's rope within the hook's internal space. Furthermore, the weight of the vertical plate and the eccentric hammer, along with the chuck feature where the eccentric hammer abuts against the hook's outer side, prevents the two concave arc-shaped plates from swaying and disrupting the self-locking state, thus preventing the rope from disengaging. This maximizes the anti-disengagement self-locking function and ensures the convenience and safety of the integrated self-locking anti-disengagement device for the crane.
[0027] This utility model features an angle between the concave arc plate and the vertical plate of the anti-detachment hook connecting plate. Without interfering with the rope diameter of the hook body, it is used for integrated self-locking, avoiding interference with the lifting operation and ensuring complete self-locking and anti-detachment function.
[0028] This utility model features an eccentric hammer block to enhance the self-locking function, using its own weight to prevent disengagement, and strengthens the self-locking stop function at the front end of the hook body to prevent the lifting rope from coming off during the operation of the anti-disengagement device, thus ensuring the safety of the lifting operation.
[0029] This utility model, by setting anti-loosening disc springs, ensures that the anti-disengagement connecting plates on the left and right sides of the hook body can swing back and forth, while preventing the connection from becoming loose and preventing the anti-disengagement device from changing position during operation, thus ensuring the safety of hoisting operations. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of an integrated self-locking anti-disengagement device for vehicles, as disclosed in one embodiment of the present utility model;
[0031] Figure 2 This is a side view of an embodiment of the self-locking anti-disengagement device for vehicles disclosed in this utility model.
[0032] Explanation of reference numerals in the attached figures:
[0033] 1. Hook body; 2. Anti-disengagement connecting plate; 21. Concave arc plate; 22. Vertical plate; 23. Front pin; 24. Connecting hook pin; 25. Rear pin; 3. Eccentric hammer block; 4. Anti-loosening disc spring; 5. Fastening bolt; 6. Self-locking bolt; 7. Anti-loosening bolt. Detailed Implementation
[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0037] The present invention will now be described in further detail with reference to the accompanying drawings:
[0038] like Figure 1 , 2 As shown, the present invention provides a crane integrated self-locking anti-disengagement device, which includes a hook body 1 and two anti-disengagement connecting plates 2 symmetrically arranged on both sides;
[0039] like Figure 1As shown, the anti-detachment connecting plate 2 includes an integrally connected concave arc plate 21 and a vertical plate 22. The concave arc plate 21 and the vertical plate 22 are designed with an included angle. The rear end of the hook body 1 is connected through the middle of the two anti-detachment connecting plates 2, so that the concave arc plate 21 is located between the front end and the rear end of the hook body 1, and the vertical plate 22 of the two anti-detachment connecting plates 2 is located outside the rear end of the hook body 1.
[0040] like Figure 2 As shown, the front ends of the concave arc plates 21 of the two anti-disengagement connecting plates 2 are connected by the front pin 23. Under normal conditions, the front pin 23 abuts against the front end of the hook body 1.
[0041] like Figure 1 , 2 As shown, an eccentric hammer block 3 is connected between the rear ends of the vertical plates 22 of the two anti-disengagement connecting plates 2. The end of the eccentric hammer block 3 abuts against the outer side of the rear end of the hook body 1 in the normal state.
[0042] When the hook body 1 lifts the rope, the rope presses the two connected concave arc plates 21 into the hook body 1. When the rope reaches the bottom of the inner side of the hook body 1, the two connected concave arc plates 21 spring back to the normal state under the gravity of the plumb plate 22 and the eccentric hammer block 3.
[0043] In this utility model, such as Figure 1 As shown, the included angle between the concave arc plate 21 and the vertical plate 22 of the anti-detachment hook connecting plate 2 is set to 90°~120°, so that the anti-detachment hook connecting plate 2 cooperates with the hook body 1 to achieve integrated self-locking, which can avoid interference with the hoisting operation and ensure complete self-locking anti-detachment function.
[0044] In this utility model, such as Figure 1 As shown, the front end of the concave arc-shaped plate 21 of the anti-detachment connecting plate 2 is provided with a first connecting pin hole, such as... Figure 2 As shown, the front pin 23 passes through the first connecting pin hole of the two anti-detachment connecting plates 2, connecting the front ends of the concave arc plates 21 of the two anti-detachment connecting plates 2 together.
[0045] like Figure 2 As shown, both sides of the first connecting pin hole of the two anti-disengagement connecting plates 2 are connected to the front pin 23 by self-locking bolts 6. Then, the outer wall of the front pin 23 abuts against the front end of the hook body 1 to form a position stop, which prevents the rope from coming off the front end when it swings in the hook, forming an important structure of the anti-disengagement device.
[0046] In this utility model, such as Figure 1 As shown, the concave arc-shaped plate 21 of the anti-detachment connecting plate 2 is provided with a second connecting pin hole at the connection position with the vertical plate 22, such as... Figure 2As shown, the rear end of the hook body 1 is connected to the two anti-disengagement connecting plates 2 through the second connecting pin holes of the two anti-disengagement connecting plates 2. Specifically, the hook body 1 and the two anti-disengagement connecting plates 2 are connected through the connecting hook pin shaft 24. The outer ends of the connecting hook pin shaft 24 are all fastened with fastening bolts 5, forming an important connection and fixing structure of the anti-disengagement device. The fastening bolts 5 adopt a double bolt fastening method to prevent the connecting hook pin shaft 24 from loosening and to ensure the stability of the fixing device.
[0047] like Figure 2 As shown, at the connection between the hook body 1 and the two anti-loosening connecting plates 2, anti-loosening disc springs 4 are provided between the hook body 1 and the two anti-loosening connecting plates 2. Specifically, each is provided with two anti-loosening disc springs 4, which are placed opposite each other with a gap in the middle. The anti-loosening disc springs 4 are used for position locking and anti-loosening to prevent the connection between the hook and the anti-loosening connecting plate 2 from becoming loose when the anti-loosening device is working, so as to change the position of the self-locking structure between the hook body 1 and the front pin 23 and the eccentric hammer block 3, thereby causing the rope to come off.
[0048] In this utility model, such as Figure 1 As shown, the rear end of the vertical plate 22 of the anti-detachment connecting plate 2 is provided with a third connecting pin hole, such as... Figure 2 As shown, an eccentric hammer block 3 is set and connected between the third connecting pin holes of the two anti-disengagement connecting plates 2. The eccentric hammer block 3 is used to strengthen its own weight and ensure that the front pin 23 abuts against the inner wall of the front end of the hook body 1 and the eccentric hammer block 3 against the outer side of the lower end of the hook body 1 under normal conditions, thereby strengthening the function of the front stop part and ensuring the self-locking function.
[0049] In this utility model, such as Figure 2 As shown, the anti-disengagement connecting plate 2 and the eccentric hammer block 3 are connected through the rear end pin 25. Anti-loosening bolts 7 are provided on the rear end pin 25 on the outer side of the two anti-disengagement connecting plates 2 for fastening and maintenance on both sides of the rear end pin 25. The double bolt fastening method on both sides is used to prevent the rear end pin 25 from loosening and to ensure the stability of the fixing device.
[0050] In this utility model, such as Figure 1 As shown, the straight length of the concave arc plate 21 is greater than the distance from the connection point between the hook body 1 and the anti-disengagement connecting plate to the inner wall of the tip of the hook body 1, and less than the distance from the connection point between the hook body 1 and the anti-disengagement connecting plate to the inner wall of any position at the bottom of the hook body 1. This ensures that the concave arc plate 21 and the front pin 23 can rotate inward into the hook body 1, but cannot rotate outward to disengage from the hook body 1, thus ensuring self-locking.
[0051] Example:
[0052] When using the device of this utility model to lift materials, the process is as follows:
[0053] Step 1: When the hook reaches the position of the material lifting rope, manually lift the lifting rope and press the two concave arc plates 21 and the front pin 23 inward, or hook the lifting rope with the tip of the hook and lift it upward. Under the action of gravity, the lifting rope and the material press the two concave arc plates 21 and the front pin 23 inward.
[0054] Step 2: When the hoisting rope reaches the inside of the hook body 1 and reaches the bottom inside the hook, where there is no obstruction to the concave arc plate 21 and the front pin 23, the concave arc plate 21 and the front pin 23 are lifted and reset to the self-locking position under the gravity of the plumb plate 22 and the eccentric hammer block 3. Figure 1 In the middle position.
[0055] Step 3: The hook is raised to move the material in the air to the destination. During the movement, the outer wall of the front pin 23 abuts against the inner wall of the front of the hook body 1 and locks itself to prevent the lifting rope from coming off.
[0056] Step 4: Lower the hook to place the material at the destination. After the material has fallen to the ground or equipment surface, it will continue to fall for a certain distance. During this process, the lifting rope will swing in the hook, but the self-locking structure will prevent the lifting rope from coming off.
[0057] Step 5: After placement, manually press down the two concave arc plates 21 and the front pin 23, and lift up the rear vertical plate 22 and the eccentric hammer block 3 to remove the lifting rope.
[0058] Step 6: After the hoisting rope is removed, the front pin 23 and the concave arc plate 21 spring back under the gravity of the vertical plate 22 and the eccentric hammer block 3. Figure 1 Self-locking position.
[0059] Advantages of this utility model:
[0060] This utility model features a front pin that self-locks with the front end of the hook body, ensuring that the hook's rope diameter is only related to the hook body's design structure. This means the anti-disengagement device does not interfere with the hook's rope diameter. After the front pin self-locks with the front end of the hook body, two concave arc-shaped plates confine the material's rope within the hook's internal space. Furthermore, the weight of the vertical plate and the eccentric hammer, along with the chuck feature where the eccentric hammer abuts against the hook's outer side, prevents the two concave arc-shaped plates from swaying and disrupting the self-locking state, thus preventing the rope from disengaging. This maximizes the anti-disengagement self-locking function and ensures the convenience and safety of the integrated self-locking anti-disengagement device for the crane.
[0061] This utility model features an angle between the concave arc plate and the vertical plate of the anti-detachment hook connecting plate. Without interfering with the rope diameter of the hook body, it is used for integrated self-locking, avoiding interference with the lifting operation and ensuring complete self-locking and anti-detachment function.
[0062] This utility model features an eccentric hammer block to enhance the self-locking function, using its own weight to prevent disengagement, and strengthens the self-locking stop function at the front end of the hook body to prevent the lifting rope from coming off during the operation of the anti-disengagement device, thus ensuring the safety of the lifting operation.
[0063] This utility model, by setting anti-loosening disc springs, ensures that the anti-disengagement connecting plates on the left and right sides of the hook body can swing back and forth, while preventing the connection from becoming loose and preventing the anti-disengagement device from changing position during operation, thus ensuring the safety of hoisting operations.
[0064] The above are merely preferred embodiments of this utility model and do not limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A self-locking anti-unhooking device for a vehicle, characterized in that: Includes the hook body and two anti-disengagement connecting plates symmetrically arranged on both sides; The anti-detachment hook connecting plate includes an integrally connected concave arc plate and a vertical plate. The concave arc plate and the vertical plate are designed with an included angle. The rear end of the hook body is connected through the middle of the two anti-detachment hook connecting plates, so that the concave arc plate is located between the front end and the rear end of the hook body, and the vertical plates of the two anti-detachment hook connecting plates are located on the outer side of the rear end of the hook body. The front ends of the concave arc-shaped plates of the two anti-detachment connecting plates are connected by a front pin, and the front pin abuts against the front end of the hook body in the normal state. An eccentric hammer block is connected between the rear ends of the vertical plates of the two anti-disengagement connecting plates. Under normal conditions, the end of the eccentric hammer block abuts against the outer side of the rear end of the hook body.
2. The integrated self-locking anti-unhooking device for a travelling crane according to claim 1, characterized in that: The included angle between the concave arc plate and the vertical plate of the anti-detachment hook connecting plate is set to 90°~120°.
3. The integrated self-locking anti-unhooking device for a travelling crane according to claim 1, characterized in that: The front end of the concave arc plate of the anti-detachment hook connecting plate is provided with a first connecting pin hole. The front pin shaft passes through the first connecting pin holes of the two anti-detachment hook connecting plates, connecting the front ends of the concave arc plates of the two anti-detachment hook connecting plates together.
4. The integrated self-locking anti-unhooking device for a travelling crane according to claim 3, characterized in that: Both sides of the first connecting pin hole of the two anti-detachment hook connecting plates are connected to the front pin shaft by self-locking bolts.
5. The integrated self-locking anti-unhooking device for a travelling crane according to claim 1, characterized in that: The concave arc plate of the anti-detachment hook connecting plate is provided with a second connecting pin hole at the connection position with the vertical plate, and the rear end of the hook body is connected to the two anti-detachment hook connecting plates through the second connecting pin holes of the two anti-detachment hook connecting plates.
6. The integrated self-locking anti-unhooking device for a cable according to claim 1 or 5, characterized in that: The hook body and the two anti-disengagement connecting plates are connected by a connecting hook pin.
7. The integrated self-locking anti-unhooking device for a wire rope hoist according to claim 1 or 5, characterized in that: At the connection point between the hook body and the two anti-detachment hook connecting plates, an anti-loosening disc spring is provided between the hook body and the two anti-detachment hook connecting plates.
8. The integrated self-locking anti-unhooking device for a travelling crane according to claim 1, characterized in that: The rear end of the vertical plate of the anti-detachment hook connecting plate is provided with a third connecting pin hole, and an eccentric hammer block is set and connected between the third connecting pin holes of the two anti-detachment hook connecting plates.
9. The integrated self-locking anti-unhooking device for a wire rope hoist according to claim 1 or 8, characterized in that: The anti-detachment hook connecting plate and the eccentric hammer block are connected by a rear end pin, and anti-loosening bolts are provided on the rear end pin on the outer side of the two anti-detachment hook connecting plates.
10. The integrated self-locking anti-unhooking device for a travelling crane according to claim 1, characterized in that: The straight length of the concave arc plate is greater than the distance from the connection point between the hook body and the anti-detachment hook connecting plate to the inner wall of the tip of the hook body, and less than the distance from the connection point between the hook body and the anti-detachment hook connecting plate to the inner wall of any position at the bottom of the hook body.