Anti-unhooking device for a crane

Abstract

The utility model discloses a crane anti -unhooking device relates to crane technical field, including lifting hook, locating block, frame, locating plate, guide rod and compression spring, and locating block is fixedly connected on the hook body of lifting hook near its opening through pin bolt, the frame is movably sleeved in the hook body outside of lifting hook, and the front end of frame is equipped with the front baffle bar for closing lifting hook opening, and the rear end is equipped with rear operating lever, locating plate fixedly connected on the frame is equipped with the guide hole on locating plate, one end of guide rod is fixedly connected with locating block, and the other end is slidably connected in the guide hole, and compression spring is sleeved on guide rod, and both ends are respectively on locating plate and locating block and for the frame provide the elastic pre -tension of making the front baffle bar keep the tendency of lifting hook opening, improve the security and convenience of hoisting operation.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to a crane anti-disengagement device. Background Technology

[0002] In modern industrial production and engineering construction, lifting operations are extremely important. As the core component connecting lifting equipment to the object being lifted, the safety of the hook is paramount. However, in reality, various factors, such as vibration, impact, operator error, or irregular shapes of the object being lifted, can cause the object on the lifting hook to accidentally detach. This can not only cause serious property damage but also potentially lead to serious accidents resulting in injury or death.

[0003] Currently available anti-disengagement devices, such as simple locking or spring clip structures, are unreliable under certain operating conditions and easily lose their anti-disengagement effect due to wear, deformation, or operational errors. More complex devices not only have high manufacturing costs but also present numerous difficulties in installation and routine maintenance. Therefore, there is an urgent market demand for a crane anti-disengagement device that is simple in structure, stable in performance, easy to operate, and reasonably priced. Utility Model Content

[0004] The purpose of this utility model is to provide a crane anti-disengagement device to solve the problems of insufficient reliability, high cost, and difficult installation and maintenance of existing anti-disengagement devices, thereby improving the safety and convenience of lifting operations.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a crane anti-disengagement device, including a hook, a positioning block, a frame, a positioning plate, a guide rod, and a compression spring. The positioning block is fixedly connected to the hook body near its opening by a pin bolt. The frame is movably sleeved on the outside of the hook body. The front end of the frame is provided with a front stop for closing the hook opening, and the rear end is provided with a rear operating rod. The positioning plate is fixedly connected to the frame, and a guide hole is provided on the positioning plate. One end of the guide rod is fixedly connected to the positioning block, and the other end is slidably connected to the guide hole. The compression spring is sleeved on the guide rod, with its two ends abutting against the positioning plate and the positioning block respectively, and providing the frame with an elastic preload force that keeps the front stop tending towards the hook opening.

[0007] Preferably, the frame is a hollow frame structure with inwardly protruding guide rails on both sides in the middle, and the guide rails slide in cooperation with the side of the hook body of the hook.

[0008] Preferably, the positioning block is a long strip structure, and the surface of the positioning block that mates with the hook body is provided with a locking structure that is compatible with the pin bolt.

[0009] Preferably, the positioning plate is vertically connected to the rear of the frame by welding or bolting.

[0010] Preferably, the guide rod and the guide hole on the positioning plate are in clearance fit.

[0011] Preferably, the compression spring is in a pre-compressed state in its natural state.

[0012] The present invention achieves the following technical advantages over the prior art:

[0013] This invention provides a crane anti-disengagement device. Through the coordinated action of a positioning block, frame, positioning plate, guide rod, and compression spring, it can automatically maintain the closed state of the hook opening during lifting operations, effectively preventing the lifting equipment from accidentally disengaging. When it is necessary to load or unload the lifting equipment, the operator can pull the frame backward using the rear operating lever. The compression spring is further compressed, and the front stop lever moves away from the hook opening, at which point the hook opening opens, facilitating the loading or unloading of the lifting equipment. When the rear operating lever is released, under the elastic preload of the compression spring, the frame drives the front stop lever to automatically reset, re-closing the hook opening. The entire operation process is simple and convenient, requiring no additional complex locking steps. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This utility model provides a structural schematic diagram of a crane anti-disengagement device;

[0016] In the diagram: 1. Positioning block; 2. Frame; 21. Front stop bar; 22. Operating lever; 3. Positioning plate; 4. Guide rod; 5. Compression spring; 6. Bolt; 7. Hook. Detailed Implementation

[0017] 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.

[0018] The purpose of this utility model is to provide a crane anti-disengagement device to solve the problems of insufficient reliability, high cost, and difficult installation and maintenance of existing anti-disengagement devices, thereby improving the safety and convenience of lifting operations.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] This utility model provides a crane anti-derailment device, such as Figure 1As shown, the device includes a hook 7, a positioning block 1, a frame 2, a positioning plate 3, a guide rod 4, and a compression spring 5. The positioning block 1 is fixedly connected to the hook body of the hook 7 near its opening by a pin bolt 6, accurately fixing the positioning block 1 at a key position near the opening of the hook 7. This ensures that subsequent components connected to the positioning block 1 can accurately act near the opening of the hook 7, guaranteeing effective control of the hook 7 opening by the anti-disengagement device and enhancing the stability and reliability of the device. The frame 2 is movably fitted outside the hook body of the hook 7. The front end of the frame 2 has a front stop 21 for closing the opening of the hook 7, and the rear end has a rear operating rod 22. The movable fit of the frame 2 on the outside of the hook body of the hook 7 enables the frame 2 to move relative to the hook 7. The front stop 21 can close the opening of the hook 7 in time during normal lifting to prevent the load from disengaging; while the rear operating rod 22 facilitates operation by the operator when needed, such as opening the hook 7, improving the ease of operation of the device. Positioning plate 3 is fixedly connected to frame 2. Positioning plate 3 has guide holes and is firmly connected to frame 2, providing stable support and a guiding foundation for guide rod 4. The guide holes guide the movement direction of guide rod 4, ensuring that frame 2 moves relative to hook 7 along a specified trajectory, making the device operate more precisely. One end of guide rod 4 is fixedly connected to positioning block 1, and the other end is slidably connected to the guide hole. This connection effectively links positioning block 1, guide rod 4, and positioning plate 3, allowing frame 2 to move through the interaction between guide rod 4 and positioning block 1. This ensures that frame 2 can move accurately according to changes in the state of hook 7, while limiting deviations in the movement direction of frame 2, enhancing the stability and reliability of the device. Compression spring 5 is sleeved on guide rod 4, with its two ends abutting against positioning plate 3 and positioning block 1 respectively. It provides frame 2 with an elastic preload that keeps front stop 21 tending towards the opening of hook 7. The elastic preload provided by compression spring 5 is key to achieving the anti-disengagement function. During normal lifting, the preload force causes the front stop 21 to be tightly close to the opening of the hook 7, effectively preventing the load from accidentally coming off the hook; and the elasticity of the spring can adapt to a certain degree of vibration or shaking, and always maintain the tendency of the front stop 21 to close the opening of the hook 7, ensuring stable anti-disengagement performance.

[0021] In a preferred embodiment, the frame 2 is a hollow frame structure with inwardly protruding guide rails on both sides. The guide rails slide in engagement with the side of the hook body of the hook 7. The hollow frame 2 structure reduces the weight of the device without affecting its structural strength, thereby reducing costs and improving the economic efficiency of the device. The inwardly protruding guide rails sliding in engagement with the side of the hook body of the hook 7 further precisely define the sliding trajectory of the frame 2 relative to the hook 7, making the movement of the frame 2 more stable and reliable, and improving the overall stability of the device and the accuracy of preventing disengagement.

[0022] In a preferred embodiment, the positioning block 1 has an elongated structure. The surface of the positioning block 1 that mates with the hook body of the hook 7 is provided with a locking structure adapted to the pin bolt 6. The elongated structure of the positioning block 1 provides a larger contact area and connection stability, increasing the connection strength with the hook 7. The locking structure adapted to the pin bolt 6 allows the positioning block 1 to be more securely fixed to the hook 7 by the pin bolt 6, preventing the positioning block 1 from loosening or shifting during use, and ensuring the long-term stability and reliability of the anti-disengagement device.

[0023] In a preferred embodiment, the positioning plate 3 is vertically connected to the rear of the frame 2 by welding or bolts 6. This vertical connection ensures the accuracy of the connection angle between the positioning plate 3 and the frame 2, providing accurate guidance for the guide rod 4. The welding or bolting method ensures a firm connection between the positioning plate 3 and the frame 2, preventing loosening and contributing to the accuracy and stability of the guiding function during long-term use.

[0024] In a preferred embodiment, the guide rod 4 and the guide hole on the positioning plate 3 are in clearance fit. The clearance fit can ensure that the guide rod 4 slides smoothly in the guide hole, so that the frame 2 can move without obstruction, and can also compensate for processing and installation errors to a certain extent, ensuring that the device can still operate normally under different assembly conditions, thereby improving the versatility and adaptability of the device.

[0025] In a preferred embodiment, the compression spring 5 is in a pre-compressed state in its natural state. The pre-compressed state means that the spring already has a certain elastic potential energy before normal operation, which can provide elastic pre-tension force to the frame 2 more quickly and powerfully, enhance the ability to close the opening of the hook 7, improve the anti-disengagement performance of the device in the early stage of lifting operation, and help the device maintain a stable working state during frequent lifting operations.

[0026] The following are the instructions for using the anti-disengagement device on this crane:

[0027] Post-installation inspection of the device

[0028] Confirm that the positioning block 1 is firmly fixed to the hook body of the hook 7 near its opening by the pin bolt 6. Check whether the pin bolt 6 is tightened and whether the locking structure between the positioning block 1 and the hook 7 is tightly fitted to ensure that the positioning block 1 is firmly connected and will not loosen or shift.

[0029] Check whether frame 2 is freely fitted onto the outside of hook 7, and whether the guide rails protruding inward from the middle of both sides of frame 2 slide smoothly with the side of hook 7, without any jamming or interference. At the same time, check whether the front stop bar 21 at the front end of frame 2 and the rear operating lever 22 at the rear end are firmly installed without any looseness or damage.

[0030] Check whether the positioning plate 3 is vertically and securely connected to the rear of the frame 2 by welding or bolts 6, and whether the guide hole on the positioning plate 3 is in the correct position. Check whether one end of the guide rod 4 is reliably fixed to the positioning block 1, whether the other end slides flexibly in the guide hole of the positioning plate 3, and whether the clearance between the two is appropriate.

[0031] Observe the compression spring 5 fitted on the guide rod 4 and confirm that its two ends are tightly abutting against the positioning plate 3 and the positioning block 1 respectively, and that the spring is in a pre-compressed state in its natural state.

[0032] Normal lifting operation (anti-disengagement mode)

[0033] When the object to be hoisted is hung on the hook 7, under the action of the elastic preload of the compression spring 5, the front stop 21 of the frame 2 will tightly move toward the opening of the hook 7 and close the opening, preventing the object from falling off the hook due to unexpected factors such as vibration and shaking during the hoisting process.

[0034] During the lifting process, due to the elasticity of the compression spring 5, the device can adapt to a certain degree of swinging or shaking of the object being lifted, and always maintain the effective closed state of the front stop 21 to the opening of the hook 7, ensuring the safety of the lifting operation.

[0035] Operation requiring opening hook 7 (hook open state)

[0036] When it is necessary to remove the suspended object and open the hook 7, the operator grabs the rear operating lever 22 of the frame 2 and pulls the frame 2 backward.

[0037] During the pulling process, the guide rod 4 slides along the guide direction in the guide hole of the positioning plate 3, and the frame 2 moves backward relative to the hook 7 against the elastic preload of the compression spring 5, and the front stop 21 gradually disengages from the opening of the hook 7.

[0038] At this point, the operator can easily remove the suspended object from hook 7.

[0039] Hook 7 closes again (restoring the anti-disengagement state).

[0040] After the suspended object is removed, the operator releases the rear control lever 22. Under the elastic force of the compression spring 5, the frame 2 moves forward.

[0041] The frame 2 drives the guide rod 4 to slide forward in the guide hole of the positioning plate 3 until the front stop 21 of the frame 2 moves back towards and closes the opening of the hook 7. The device returns to the anti-disengagement state and is ready for the next lifting operation.

[0042] Routine maintenance and inspection

[0043] Regularly check the tightness of the pin bolt 6 to ensure that the positioning block 1 and the hook 7 are securely connected. Observe the locking structure on the contact surface between the positioning block 1 and the hook 7 for wear or damage, and replace or repair it in time if any abnormality is found.

[0044] Check the sliding surfaces of the guide rail of frame 2 and the hook body of hook 7. If there is wear or foreign matter attached, clean it and apply appropriate lubricant to ensure smooth sliding of frame 2.

[0045] Inspect the connection between the positioning plate 3 and the frame 2 to check for cracks in the welds or loose bolts 6. Also check the gap between the guide rod 4 and the guide hole; if the gap is abnormal and affects sliding, make the appropriate adjustments.

[0046] Regularly check the elastic performance of compression spring 5, and observe whether the spring is fatigued, deformed, or damaged. If there is a problem, replace the spring in time to ensure that the device has sufficient elastic preload to achieve the anti-disengagement function.

[0047] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A crane anti-unhooking device comprising a hook, characterized in that, Also includes: A positioning block, which is fixedly connected to the hook body near its opening by a pin bolt; The frame is movably fitted outside the hook body of the hook, and the front end of the frame is provided with a front stop for closing the hook opening, and the rear end is provided with a rear operating lever; A positioning plate is fixedly connected to the frame, and a guide hole is provided on the positioning plate; Guide rod, one end of which is fixedly connected to the positioning block, and the other end of which is slidably connected to the guide hole; and A compression spring is sleeved on the guide rod, with its two ends abutting against the positioning plate and the positioning block respectively, and providing the frame with an elastic preload that keeps the front stop bar tending toward the hook opening.

2. Crane dehooking device according to claim 1, characterized in that: The frame is a hollow frame structure with inwardly protruding guide rails on both sides in the middle, and the guide rails slide in conjunction with the side of the hook body of the hook.

3. The hoist anti-malfunctioning device according to claim 1, characterized in that: The positioning block is a long strip structure, and the surface of the positioning block that mates with the hook body is provided with a locking structure that is compatible with the pin bolt.

4. The hoist anti-malfunctioning device according to claim 1, characterized in that: The positioning plate is vertically connected to the rear of the frame by welding or bolting.

5. The hoist anti-malfunctioning device according to claim 1, characterized in that: The guide rod and the guide hole on the positioning plate are clearance fit.

6. The hoist anti-malfunctioning device according to claim 1, characterized in that: The compression spring is in a pre-compressed state under natural conditions.

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