A quick-release safety device for grab bucket and crane hook

Abstract

This utility model provides a quick-release safety device for grab buckets and overhead crane hooks, relating to the field of overhead crane hook technology. It includes: a housing; a connector fixedly connected to the top of the housing; multiple lifting rings fixedly connected to the top of the connector; two symmetrically distributed hooks rotatably connected inside the housing; and a grab bucket connecting plate below the hooks. This device, through its opening and closing mechanism, can quickly control the hooks to open and complete the release, simplifying the release operation process, improving release efficiency, eliminating the need for close-range manual operation, and avoiding the danger zone around the grab bucket for operators. Connection is completed by controlling the hooks to close during installation, making operation convenient. Furthermore, the locking mechanism securely locks the hooks when they are closed, effectively preventing them from opening automatically due to vibration, collision, or other unexpected situations while carrying heavy loads, thus avoiding equipment damage, economic losses, and personnel safety threats caused by grab bucket falling or material spillage.

Description

Technical Field

[0001] This utility model relates to the field of crane hook technology, specifically a safety device for quick unhooking of a grab bucket from a crane hook. Background Technology

[0002] In material handling operations in industries such as ports, mines, and construction, the connection and unhooking of grab buckets and overhead crane hooks are critical links in the material handling process. In existing technologies, the connection between grab buckets and overhead cranes often uses a single hook or a simple hook-and-loop structure. Unhooking operations often require manual assistance, requiring operators to manually operate at close range to disconnect the connection. This places the operators in a dangerous area around the grab bucket, making them prone to accidents such as grab bucket tipping over or operational errors leading to crushing. Furthermore, the unhooking efficiency is slow. At the same time, traditional devices lack a reliable locking mechanism, and the hook is prone to opening on its own due to vibration, collisions, or other unexpected situations while carrying heavy loads, causing the grab bucket to fall and materials to scatter. This results in equipment damage and economic losses, as well as posing a serious threat to the safety of on-site personnel. Utility Model Content

[0003] The purpose of this application is to provide a safety device for quick unhooking of a grab bucket and a crane hook, so as to solve the technical problems of low unhooking efficiency and low safety in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a quick unhooking safety device for a grab bucket and a crane hook, comprising: a housing, a connector fixedly connected to the top of the housing, a plurality of lifting rings fixedly connected to the top of the connector, two symmetrically distributed lifting hooks rotatably connected inside the housing, and a grab bucket connecting plate provided below the lifting hooks;

[0005] An opening and closing mechanism is provided on the housing and is used to control the opening and closing of the two lifting rings. The opening and closing mechanism includes: a deflection rod, a connecting rod, a hydraulic cylinder, a slider, and a connecting groove.

[0006] A locking mechanism is provided on the two hooks respectively, for locking the two combined lifting rings. The locking mechanism includes: a fixing plate, a locking rod, a connecting block a, a locking plate and a slot.

[0007] Furthermore, deflection rods are fixedly connected to the top of the two hooks respectively. The two deflection rods are arranged in a V-shape. A connecting rod is rotatably connected to the top of each of the two deflection rods. A hydraulic cylinder is fixedly installed on the top of the housing. The bottom end of the output end of the hydraulic cylinder extends into the housing and is fixedly installed with a slider. Connecting grooves are opened on opposite sides of the slider. One end of the top of each of the two connecting rods is rotatably connected to the inner wall of the two connecting grooves respectively.

[0008] Furthermore, a fixing plate is fixedly connected to the inner side of the hook, a locking rod is fixedly connected to the front side of the fixing plate, and a connecting block a is fixedly connected to the inner side of the other hook. A locking plate is rotatably connected to one end of the connecting block a, and a slot is provided at the bottom of the locking plate away from the other end.

[0009] Furthermore, guide rails are fixedly installed on the inner walls of opposite sides of the housing, and two symmetrically distributed guide blocks are fixedly connected to the outside of the slider, with the guide blocks located inside the opposite guide rails.

[0010] Furthermore, two symmetrically distributed connecting blocks b are fixedly connected to the top of the grab bucket connecting plate, and a triangular plate is connected between the two connecting blocks b. A connecting buckle is rotatably connected to the triangular plate near the top position.

[0011] Furthermore, each of the two hooks has a matching groove at one of its opposite ends, and the two matching grooves fit together.

[0012] The beneficial effects of this utility model are:

[0013] The advantages of this utility model are that the opening and closing mechanism can quickly control the hook to open and complete the unhooking, which simplifies the unhooking operation process, improves the unhooking efficiency, eliminates the need for close-range manual operation, avoids the danger zone around the grab bucket for the operators, and the connection can be completed by controlling the hook to close during the hooking process, making the operation convenient.

[0014] Secondly, the locking mechanism can securely lock the hook when it is closed, effectively preventing the hook from opening on its own due to vibration, collision or other unexpected situations during the loading of heavy objects, thus avoiding equipment damage, economic losses and threats to personnel safety caused by the grab bucket falling and materials scattering. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0017] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

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

[0019] Figure 4This is a schematic diagram of the slider structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the hook structure of this utility model.

[0021] The following are the labeling elements in the figure:

[0022] 1. Housing; 11. Connector; 12. Lifting ring; 13. Hook; 14. Grab bucket connecting plate; 2. Deflecting rod; 21. Connecting rod; 22. Hydraulic cylinder; 23. Slider; 24. Connecting groove; 25. Guide rail; 26. Guide block; 3. Fixing plate; 31. Locking rod; 32. Connecting block a; 33. Locking plate; 34. Slot; 4. Connecting block b; 41. Triangular plate; 42. Connecting buckle; 5. Fitting groove. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0026] 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 application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments. Example

[0028] As attached Figures 1 to 5The safety device for quick unhooking of a grab bucket and a crane hook shown includes: a housing 1, a connector 11 fixedly connected to the top of the housing 1, a plurality of lifting rings 12 fixedly connected to the top of the connector 11, two symmetrically distributed lifting hooks 13 rotatably connected inside the housing 1, a grab bucket connecting plate 14 provided below the lifting hooks 13, an opening and closing mechanism provided on the housing 1 for controlling the opening and closing of the two lifting rings 12, and a locking mechanism provided on the two lifting hooks 13 for locking the two combined lifting rings 12.

[0029] In use, the crane's steel cable is connected to the lifting ring 12, and the grab bucket is connected to the grab bucket connecting plate 14. Then, the two hooks 13 are opened by the opening and closing mechanism. After the two hooks 13 are opened, the unhooking operation can be completed quickly. When it is necessary to hook again, the two hooks 13 are closed to complete the connection. The two hooks 13 are locked by the locking mechanism to prevent the hooks 13 from opening accidentally and improve safety. When unhooking, the locking mechanism is opened to release the lock of the two hooks 13, and the two hooks 13 can be opened.

[0030] In a preferred embodiment, two symmetrically distributed connecting blocks b4 are fixedly connected to the top of the grab bucket connecting plate 14, and a triangular plate 41 is connected between the two connecting blocks b4. A connecting buckle 42 is rotatably connected to the triangular plate 41 near the top position.

[0031] Furthermore, during hooking, the bottom ends of the two hooks 13 are positioned on both sides of the connecting buckle 42 by controlling the crane. After the two hooks 13 are closed, they are connected to the connecting buckle 42. When unhooking, the grab bucket is placed on the ground, and then the two hooks 13 are opened to release the connection with the connecting buckle 42. The two hooks 13 are removed from the connecting buckle 42 to complete the unhooking operation. Example

[0032] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 5 As shown below, see details:

[0033] The opening and closing mechanism includes: a deflecting rod 2, a connecting rod 21, a hydraulic cylinder 22, a slider 23, and a connecting groove 24. The tops of the two hooks 13 are respectively fixedly connected to the deflecting rods 2, which are arranged in a V-shape. The tops of the two deflecting rods 2 are rotatably connected to the connecting rods 21. The top of the housing 1 is fixedly installed with the hydraulic cylinder 22. The bottom end of the output end of the hydraulic cylinder 22 extends into the housing 1 and is fixedly installed with the slider 23. The slider 23 has connecting grooves 24 on opposite sides. The top ends of the two connecting rods 21 are rotatably connected to the inner walls of the two connecting grooves 24 respectively.

[0034] When unhooking is required, the hydraulic cylinder 22 retracts, and the output end of the hydraulic cylinder 22 drives the slider 23 to move upward. When the slider 23 moves, it drives the two deflecting rods 2 to deflect in opposite directions through the connecting rod 21. The deflecting rods 2 drive the hooks 13 to rotate in opposite directions, so that the bottom ends of the two hooks 13 separate to complete the unhooking action. When hooking the grab bucket, the hydraulic cylinder 22 pushes out, pushing the slider 23 to move downward. Through the connecting rod 21, the two deflecting rods 2 deflect in opposite directions, thereby driving the two hooks 13 to rotate in opposite directions. The bottom ends of the two hooks 13 close together to complete the hooking action.

[0035] In a preferred embodiment, guide rails 25 are fixedly installed on the inner walls of opposite sides of the housing 1, and two symmetrically distributed guide blocks 26 are fixedly connected to the outside of the slider 23. The guide blocks 26 are located inside the opposite guide rails 25.

[0036] Furthermore, when the slider 23 moves, it will drive the two guide blocks 26 to move along the inside of the two guide rails 25, which will guide the slider 23 and keep the slider 23 moving smoothly. Example

[0037] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 5 As shown below, see details:

[0038] The locking mechanism includes: a fixed plate 3, a locking rod 31, a connecting block a32, a locking plate 33, and a slot 34. The fixed plate 3 is fixedly connected to the inner side of the hook 13, the locking rod 31 is fixedly connected to the front side of the fixed plate 3, the connecting block a32 is fixedly connected to the inner side of the other hook 13, the locking plate 33 is rotatably connected to one end of the connecting block a32, and a slot 34 is provided at the bottom of the locking plate 33 away from the other end.

[0039] Specifically: Before the two hooks 13 close, the locking plate 33 is rotated clockwise so that it rests against the inner wall of the hook 13. Magnets on the inner wall of the hook 13 are used to hold the locking plate 33 in place. After the hooks 13 close, the locking plate 33 is manually separated from the magnets, and then rotated counterclockwise so that the slot 34 on the locking plate 33 aligns perfectly with the locking rod 31. Then, the two hooks 13 are slightly opened to a certain degree so that the locking plate 33 and the locking rod 31 abut against each other, preventing the locking plate 33 from closing. When the locking plate 33 is opened due to external force, the two hooks 13 are locked by the locking plate 33 and the locking rod 31, which prevents the two hooks 13 from opening accidentally and improves the safety performance. When it is necessary to open the two hooks 13 again, first control the two hooks 13 to be fully closed, thereby releasing the restriction between the locking plate 33 and the locking rod 31. Then, open the locking rod 31 clockwise and attract it to the magnet, so that the slot 34 is removed from the locking rod 31, thereby releasing the lock on the two hooks 13. Afterwards, the staff leaves the area around the grab bucket.

[0040] In a preferred embodiment, the bottom ends of the two hooks 13 are respectively provided with matching grooves 5, and the two matching grooves 5 are engaged with each other.

[0041] Furthermore, when the two hooks 13 are closed, the two mating grooves 5 engage, causing the two hooks 13 to come together.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A safety device for quick unhooking of a grab bucket from a hook of a travelling crane, characterized in that, include: The shell (1) has a connector (11) fixedly connected to the top of the shell (1), and a plurality of lifting rings (12) fixedly connected to the top of the connector (11). The shell (1) has two symmetrically distributed hooks (13) rotatably connected inside, and a grab bucket connecting plate (14) is provided below the hooks (13). An opening and closing mechanism is provided on the housing (1) and is used to control the opening and closing of the two lifting rings (12). The opening and closing mechanism includes: a deflection rod (2), a connecting rod (21), a hydraulic cylinder (22), a slider (23), and a connecting groove (24). The locking mechanism is provided on the two hooks (13) respectively, and is used to lock the two combined lifting rings (12). The locking mechanism includes: a fixing plate (3), a locking rod (31), a connecting block a (32), a locking plate (33), and a slot (34).

2. The quick unhooking safety device for grab and hook of a travelling crane according to claim 1, characterized in that, Two hooks (13) are respectively fixedly connected to the top of the two hooks (13). The two hooks (2) are arranged in a V-shape. The top of the two hooks (2) is rotatably connected to the connecting rod (21). A hydraulic cylinder (22) is fixedly installed on the top of the housing (1). The bottom end of the output end of the hydraulic cylinder (22) extends into the housing (1) and is fixedly installed with a slider (23). The slider (23) has connecting grooves (24) on opposite sides. The top one end of the two connecting rods (21) is rotatably connected to the inner wall of the two connecting grooves (24).

3. The quick unhooking safety device for grab bucket and hook of travelling crane according to claim 1, characterized in that, A fixing plate (3) is fixedly connected to the inner side of the hook (13), and a locking rod (31) is fixedly connected to the front side of the fixing plate (3). A connecting block a (32) is fixedly connected to the inner side of the other hook (13). A locking plate (33) is rotatably connected to one end of the connecting block a (32). A slot (34) is provided at the bottom of the locking plate (33) away from the other end.

4. The quick-release safety device for grab bucket and crane hook according to claim 2, characterized in that, Guide rails (25) are fixedly installed on the inner walls of opposite sides of the housing (1). Two symmetrically distributed guide blocks (26) are fixedly connected to the outside of the slider (23). The guide blocks (26) are located inside the opposite guide rails (25).

5. The quick unhooking safety device for grab bucket and hook of travelling crane according to claim 1, characterized in that, The top of the grab bucket connecting plate (14) is fixedly connected to two symmetrically distributed connecting blocks b (4), and a triangular plate (41) is connected between the two connecting blocks b (4). A connecting buckle (42) is rotatably connected to the triangular plate (41) near the top position.

6. The quick unhooking safety device for grab bucket and hook of a travelling crane according to claim 1, characterized in that, The bottom ends of the two hooks (13) are respectively provided with matching grooves (5), and the two matching grooves (5) are matched together.

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