A hook anti-drop device

Abstract

The utility model relates to a crane hoisting equipment for steel industry, concretely is a kind of lifting hook anti -drop device. Including lifting hook, lifting hook neck and the earring fixed to the outside of hook tip, still include: the positioning block of rotation sleeve set on lifting hook neck, the guide column and the limiting column of being located on positioning block, the U-shaped slide plate engaged in the both sides of positioning block;U-shaped slide plate includes slide bar part and connecting part, slide bar part is set with slide groove part for guide column sliding and is equipped with clamping groove part for being used in retracted position and the clamping of limiting column;Connecting part is set with the lock slot part of accommodating earring and the lock pin hole of transverse through, lock pin is equipped in lock pin hole. The device adopts rigid sliding locking and mechanical locking combination, and the structural strength is high, can effectively prevent lifting hook accidental drop, ensure hoisting operation safety.

Description

Technical Field

[0001] This utility model relates to crane lifting equipment used in the steel industry, specifically a hook anti-detachment device. Background Technology

[0002] In the steel metallurgical industry, the anti-disengagement device of the crane hook is a core component to ensure the safety of lifting operations. It generally requires the design of a mechanical structure to prevent the hook from accidentally falling off. However, traditional spring-locking anti-disengagement hooks are prone to accidental disengagement during the grab bucket lifting operation of vortex well cranes, causing the grab bucket to fall to the bottom of the vortex well, which is difficult to retrieve, thus affecting production and posing a safety hazard.

[0003] Specifically, the drawbacks of traditional spring-loaded locking hooks used in cyclone well lifting operations are as follows: Spring-loaded locking anti-detachment devices are typically made using a stamping process for iron plates, resulting in relatively low strength. Located inside the hook and close to the lifting rope, they are prone to deformation and failure due to impacts or compression after prolonged use, affecting their anti-detachment function. Furthermore, if the return spring of the spring-loaded anti-detachment device is damaged, the anti-detachment function will be completely lost, posing additional safety risks.

[0004] In summary, there is an urgent need to design a locking device to prevent the hook of a grab crane in a vortex well from detaching, in order to solve the pain points of the aforementioned traditional technologies. Summary of the Invention

[0005] This utility model addresses the shortcomings of existing technologies and proposes a hook anti-detachment device to solve the aforementioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hook anti-detachment device includes a hook, a hook neck shaft, and an earring fixed to the outside of the hook tip. It further includes: a positioning block rotatably sleeved on the hook neck shaft, a guide post and a limiting post disposed on the positioning block, and a U-shaped sliding plate engaged with both sides of the positioning block. The U-shaped sliding plate includes sliding rod portions on both sides and a connecting portion in the middle. An elongated sliding groove is provided on the sliding rod portion, and the guide post slides through the sliding groove portion. The end of the sliding rod portion is provided with an inwardly recessed slot portion for engaging with the limiting post when the U-shaped sliding plate slides to the retracted position. The connecting portion is provided with a locking groove portion for accommodating the earring, and locking pin holes located on both sides of the locking groove portion and extending laterally through the connecting portion body; and a locking pin passing through the locking pin holes.

[0007] When the U-shaped slide plate slides to the working position, the earring is placed in the locking groove, and the locking pin passes laterally through the center hole of the earring to lock the U-shaped slide plate to the opening of the hook.

[0008] Furthermore, there are two guide posts, which are symmetrically located on both sides of the positioning block and coaxially arranged; there are also two limiting posts, which are symmetrically located on both sides of the positioning block and coaxially arranged.

[0009] Furthermore, each of the two sliding rods has a sliding groove, the positions of which correspond to the positions of the two guide posts; each of the two sliding rods has a retaining groove at its end, the positions of which correspond to the positions of the two limiting posts.

[0010] Furthermore, the slot portion is provided with a deformation groove so that the opening of the slot portion can undergo elastic deformation, facilitating the insertion and disengagement of the limiting post.

[0011] Furthermore, the locking pin includes a threaded portion and an operating portion; a locking pin groove is provided on the connecting portion on the radial side of the locking pin hole, which slides in cooperation with the operating portion to limit the sliding stroke of the locking pin.

[0012] Furthermore, it also includes a left handle, which is inserted into one end of the locking pin hole with a clearance fit, and the front end of the left handle is provided with a threaded sleeve that engages with the threaded portion of the locking pin.

[0013] Furthermore, the left handle is provided with an annular groove, and the connecting part is provided with a threaded hole corresponding to the groove. The limiting set screw is screwed into the threaded hole and extends into the groove, so that the left handle is axially limited and can rotate.

[0014] Furthermore, it also includes a right handle, which is fixedly connected to the other end of the locking pin hole.

[0015] Furthermore, a limiting nut is provided on the neck shaft of the hook to axially limit the positioning block.

[0016] Compared with the prior art, this utility model has the following advantages.

[0017] This invention employs a combination of rigid sliding locking and mechanical locking, using a U-shaped sliding plate as the locking body to achieve locking of the hook opening. The U-shaped sliding plate has high structural strength and is positioned on the outside of the hook, away from the lifting rope device, effectively preventing functional failure due to collision deformation or rope entanglement. Furthermore, it is locked using a bolt-and-thread fastening method, effectively preventing the locked U-shaped sliding plate from disengaging from the lug, ensuring reliable locking. In the non-working state, the U-shaped sliding plate fully retracts and locks against the side wall of the positioning block, without affecting the rope threading through the hook when lifting objects. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0019] Figure 1 This is a three-dimensional view of the hook anti-detachment device in the non-locking state, as shown in the embodiment.

[0020] Figure 2 This is a front view of the hook anti-detachment device in the non-locked state, as shown in the embodiment.

[0021] Figure 3 This is a front view of the locked state of the hook anti-detachment device in an embodiment.

[0022] Figure 4 This is a three-dimensional view of the locked state of the hook anti-detachment device in an embodiment.

[0023] Figure 5 for Figure 2 Partial sectional view of AA in the image.

[0024] Figure 6 This is a three-dimensional view of the U-shaped sliding plate of the hook anti-detachment device in the embodiment.

[0025] In the diagram, 1. Hook; 2. Hook neck shaft; 3. U-shaped sliding plate; 4. Positioning block; 5. Limiting post; 6. Right handle; 7. Left handle; 8. Locking pin; 9. Earring; 10. Limiting set screw; 11. Guide post; 12. Limiting nut; 301. Sliding rod part; 302. Connecting part; 303. Slot part; 304. Slide part; 305. Locking groove part; 306. Locking pin hole; 307. Locking pin slide groove; 308. Deformation groove; 801. Threaded part; 802. Operating part; 701. Slot; 702. Threaded sleeve. Detailed Implementation

[0026] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0027] like Figure 1-6 As shown in Example 1, the hook anti-detachment device mainly includes a hook 1, an earring 9, a positioning block 4, a U-shaped sliding plate 3, a locking pin 8, and related operating and limiting components.

[0028] Among them, the earring 9 is welded and fixed to the outside of the hook body at the head of the hook 1, and a central hole is opened in the middle of the positioning block 4. The hook neck shaft 2 passes through the central hole, so that the positioning block 4 can rotate around the axis of the hook neck shaft 2.

[0029] On the neck shaft 2 of the hook, a limiting nut 12 is screwed onto the upper end of the positioning block 4. The limiting nut 12 axially limits the positioning block 4 to prevent it from moving up and down, while allowing it to rotate circumferentially to adapt to different lifting angles.

[0030] In Example 2, the main body of the positioning block 4 is rectangular. Two limiting posts 5 are symmetrically and coaxially fixedly installed on both sides of the positioning block 4 near one end. Similarly, two guide posts 11 are symmetrically and coaxially fixedly installed on both sides of the positioning block 4 near the other end.

[0031] In the preferred configuration, the limiting post 5 and the guide post 11 are installed in the same horizontal plane.

[0032] Example 3: The U-shaped sliding plate 3 is U-shaped in overall shape and consists of two sliding rod parts 301 on both sides and a connecting part 302 in the middle. A long, narrow groove 304 is machined in the middle of the two sliding rod parts 301. During installation, the U-shaped sliding plate 3 engages with the positioning block 4 from both sides, causing the guide posts 11 on both sides of the positioning block 4 to insert into the corresponding grooves 304, thereby allowing the U-shaped sliding plate 3 to slide relative to the positioning block 4 along the radial (i.e., horizontal) direction of the guide posts 11.

[0033] At the end of each sliding rod portion 301, an inwardly recessed slot portion 303 is machined. When the U-shaped sliding plate 3 slides towards the limiting post 5 of the positioning block 4 to its limit position (first position or retracted locking position), the slot portion 303 can precisely engage with the corresponding limiting post 5, thereby locking the U-shaped sliding plate 3 in the retracted state. To facilitate the smooth engagement of the limiting post 5, the upper and lower sides of the slot portion 303 are preferably provided with deformation grooves 308, so that under the action of horizontal thrust, the opening of the slot portion 303 can produce slight elastic deformation, facilitating the engagement and disengagement of the limiting post 5.

[0034] A locking groove 305 with an outward opening is provided in the middle of the connecting part 302 of the U-shaped slide plate 3. On the side walls on both sides of the locking groove 305, there are locking pin holes 306 that are coaxial and transversely penetrate the body of the connecting part 302. On the wall of one of the locking pin holes 306, a locking pin groove 307 is machined radially.

[0035] The locking pin 8 is cylindrical, with an extension rod radially provided at one end, serving as the operating part 802 (for example, it can be designed as a flat head or knurled head), and the other end serving as the threaded part 801. The locking pin 8 passes through the locking pin hole 306. Its operating part 802 extends from the locking pin groove 307, facilitating manual operation by hand. The length of the locking pin groove 307 limits the left and right sliding stroke of the locking pin 8.

[0036] Example 4: A left handle 7 and a right handle 6 are respectively provided on both sides of the U-shaped sliding plate 3. The right handle 6 is fixedly connected to the right side of the locking pin hole 306 (i.e., the side with the locking pin groove 307) by threads. The left handle 7 is inserted into the left side of the locking pin hole 306 with a clearance fit.

[0037] Specifically, the front end of the left handle 7 has a threaded sleeve 702 with internal threads, and a ring-shaped stepped groove 701 is machined on its shaft. On the connecting part 302 of the U-shaped slide plate 3, corresponding to the position of the groove 701 of the left handle 7, a radial threaded hole is machined. A limiting screw 10 is screwed into this threaded hole, with its end extending into the groove 701 of the left handle 7. This structure allows the left handle 7 to rotate freely within the locking pin hole 306, but its axial movement is restricted by the engagement of the limiting screw 10 and the groove 701.

[0038] The working process of this utility model: Locking Process: In the initial state (anti-detachment device open): The U-shaped slide plate 3 is in the first position, with its slot 303 engaged with the limiting post 5 of the positioning block 4, and the locking slot 305 away from the hook opening of the hook 1 and the earring 9. Manually hold the left handle 7 or the right handle 6 and pull the U-shaped slide plate 3 horizontally in the direction away from the limiting post 5 (i.e., towards the hook opening). At this time, the limiting post 5 disengages from the slot 303, and the guide post 11 slides in the slide groove 304, guiding the U-shaped slide plate 3 to move smoothly to the second position (working position). Press down the connecting part 302 of the U-shaped slide plate 3 so that the opening of its locking slot 305 aligns with the earring 9, and adjust its position so that the center hole of the earring 9 is concentric with the locking pin hole 306. Use your finger to move the operating part 802 of the locking pin 8, so that it slides from the right side (initial side) to the left. The rod of the locking pin 8 passes through the right locking pin hole 306, the center hole of the earring 9 in sequence, and finally enters the left locking pin hole 306. At this point, the rod of the locking pin 8 passes through the earring 9, locking the earring 9 within the locking groove 305. Finally, the left handle 7 is turned. Because the left handle 7 is axially limited, its front threaded sleeve 702 will screw into the threaded portion 801 of the locking pin 8, which has already extended into the left locking pin hole 306, achieving threaded locking. Thus, the opening of the hook 1 is completely closed by the rigid U-shaped sliding plate 3 and the locking pin 8, forming a reliable mechanical lock.

[0039] Unlocking process: Turn the left handle 7 counterclockwise to completely disengage its threaded sleeve 702 from the threaded portion 801 of the locking pin 8. Move the operating part 802 of the locking pin 8 to the right to completely disengage the locking pin 8 from the center hole and the left locking pin hole 306 of the earring 9, retracting it to the initial position. Lift the U-shaped slide plate 3 upwards to disengage the locking groove 305 from the earring 9. Push the left handle 7 or the right handle 6 to slide the U-shaped slide plate 3 back along the guide post 11 until its slot 303 engages again with the limiting post 5 of the positioning block 4. The device returns to the retracted and locked state, and the hook opening opens, ready for hanging and lifting objects.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "preferred embodiment," "detailed description," or "preferred embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Therefore, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of this utility model.

Claims

1. A hook anti-derailment device, comprising a hook (1), a hook neck shaft (2), and an ear loop (9) fixed to the outside of the hook tip of the hook (1), characterized in that, Also includes: Rotate the positioning block (4) sleeved on the neck shaft (2) of the hook, the guide post (11) and the limiting post (5) set on the positioning block (4), and the U-shaped sliding plate (3) engaged on both sides of the positioning block (4); The U-shaped slide plate (3) includes two sliding rod parts (301) on both sides and a connecting part (302) in the middle; the sliding rod part (301) is provided with a long strip-shaped sliding groove part (304), and the guide post (11) slides through the sliding groove part (304); the end of the sliding rod part (301) is provided with an inwardly recessed slot part (303), which is used to engage with the limiting post (5) when the U-shaped slide plate (3) slides to the retracted position; the connecting part (302) is provided with a locking groove part (305) for accommodating the earring (9), and locking pin holes (306) located on both sides of the locking groove part (305); and a locking pin (8) passing through the locking pin hole (306).

2. The hook anti-derailment device according to claim 1, characterized in that, When the U-shaped slide plate (3) slides to the working position, the earring (9) is placed in the locking groove (305), and the locking pin (8) passes laterally through the center hole of the earring (9) to lock the U-shaped slide plate (3) at the opening of the hook (1).

3. The hook anti-detachment device according to claim 1, characterized in that, There are two guide posts (11), which are symmetrically located on both sides of the positioning block (4) and coaxially arranged; there are two limit posts (5), which are symmetrically located on both sides of the positioning block (4) and coaxially arranged.

4. The hook anti-derailment device according to claim 3, characterized in that, Each of the two sliding rods (301) on both sides is provided with a sliding groove (304), and the positions of the two sliding grooves (304) correspond to the positions of the two guide posts (11); each of the ends of the sliding rods (301) on both sides is provided with a slot (303), and the positions of the two slots (303) correspond to the positions of the two limiting posts (5).

5. The hook anti-detachment device according to claim 1, characterized in that, The slot (303) is provided with a deformation groove (308) so that the opening of the slot (303) can be elastically deformed, which facilitates the insertion and release of the limiting post (5).

6. The hook anti-derailment device according to claim 1, characterized in that, The locking pin (8) includes a threaded portion (801) and an operating portion (802); the connecting portion (302) has a locking pin groove (307) on the radial side of the locking pin hole (306) that slides with the operating portion (802) to limit the sliding stroke of the locking pin (8).

7. A hook anti-detachment device according to claim 6, characterized in that, It also includes a left handle (7), which is inserted into one end of the locking pin hole (306) with a clearance fit, and the front end of the left handle (7) is provided with a threaded sleeve (702) that engages with the threaded portion (801) of the locking pin (8).

8. A hook anti-detachment device according to claim 7, characterized in that, The left handle (7) is provided with an annular groove (701), and the connecting part (302) is provided with a threaded hole corresponding to the groove (701). The limiting screw (10) is screwed into the threaded hole and extends into the groove (701), so that the left handle (7) is axially limited and can rotate.

9. A hook anti-derailment device according to claim 1, characterized in that, It also includes a right handle (6), which is fixedly connected to the other end of the locking pin hole (306).

10. A hook anti-derailment device according to claim 1, characterized in that, The hook neck shaft (2) is provided with a limiting nut (12) for axially limiting the positioning block (4).

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