Safety lifting hook of crane

Abstract

The crane safety hook comprises a supporting frame, a containing groove is formed in the supporting frame, a moving plate is slidably connected into the containing groove, a mounting column is fixedly connected to the bottom face of the moving plate, the mounting column slidably penetrates through the supporting frame, a hook body is fixedly connected to the bottom of the mounting column, and an anti-disengaging assembly corresponding to the hook body is mounted on the mounting column; a mounting groove is formed in the bottom wall of the containing groove, and a compression spring is fixedly connected between the bottom face of the moving plate and the bottom face of the mounting groove and located on the peripheral side of the mounting column. The top face of the supporting frame is rotationally connected with a connecting column. The lifting hook is simple in structure, convenient to operate, capable of stably limiting goods on the lifting hook body, free of unhooking and convenient to control.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting, in particular to a safety hook of a crane. Background Art

[0002] The crane hook is the most common type of lifting device in lifting machinery. The hook is often suspended with the help of components such as pulleys. The existing crane hook is generally used on the wire rope of the lifting mechanism. The hook is divided into single hook and double hook according to the shape. The hook is hung on the suspended object and the crane is started to lift the suspended object upward. In the process of moving the suspended object, the suspended object is prone to shaking due to inertia. Once the shaking amplitude is too large, it is easy to cause the suspended object to fall off the hook, which is dangerous.

[0003] Existing hooks typically use a shield or bar to shield the hook, but most rely on springs or torsion springs to apply pressure. This can easily cause the shield or bar to become unhooked due to instability in the event of a shake. Some existing technologies use screws or hydraulic rods to stabilize the shield, but these structures are complex, difficult to open after the lift is completed, and cumbersome to operate. Therefore, a crane safety hook with a stable structure, strong resistance to unhooking, and easy control is urgently needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a crane safety hook to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following solution: The present invention provides a crane safety hook, comprising a support frame, a receiving groove is provided in the support frame, a moving plate is slidably connected in the receiving groove, a mounting column is fixedly connected to the bottom surface of the moving plate, the mounting column slides through the support frame, a hook body is fixedly connected to the bottom of the mounting column, and an anti-slip component is installed on the mounting column corresponding to the hook body; a mounting groove is provided on the bottom wall of the receiving groove, a compression spring is fixedly connected between the bottom surface of the moving plate and the bottom surface of the mounting groove, and the compression spring is located around the mounting column; a connecting column is rotatably connected to the top surface of the support frame.

[0006] Preferably, the anti-slip assembly includes a baffle rod rotatably connected to the mounting column, a sliding groove adapted to the baffle rod is provided on the hook body, the end of the baffle rod away from the mounting column is located in the sliding groove, and the baffle rod is arranged in contact with the side wall of the sliding groove; a tensioning assembly is installed on the bottom surface of the support frame corresponding to the baffle rod.

[0007] Preferably, the tensioning assembly includes a fixing rod fixedly connected to the bottom surface of the support frame, and several connecting rods are rotatably connected between the fixing rod and the middle part of the barrier rod. Several of the connecting rods are in a vertical state during the lifting process, and a pressure spring is fixedly connected between any of the connecting rods and the mounting column.

[0008] Preferably, the top surface of the support frame is fixedly connected to an annular box body, the connecting column is located inside the annular box body, a connecting pipe is opened between the annular box body and the top wall of the accommodating groove, hydraulic oil is contained in the annular box body, and a liquid inlet is opened on the top surface of the annular box body.

[0009] Preferably, an annular retaining ring is fixedly connected to the top surface of the support frame, and the annular retaining ring is located outside the annular box body.

[0010] Preferably, the number of connecting rods between each of the fixing rods and the blocking rods is three, and the length of the connecting rods is 6-8 cm; the length of the blocking rods is 22-26 cm.

[0011] The present invention discloses the following technical effects: by providing a mounting post that can slide up and down in a receiving groove, the mounting post is stabilized at the bottom of the receiving groove due to the gravity of the heavy object during the lifting process, thereby tightening the anti-slip component, so that the anti-slip component is stabilized between the mounting post and the hook body, effectively preventing unhooking due to shaking; when the lifting work is completed and the heavy object is put down, the moving plate moves to the top of the receiving groove under the action of the compression spring, and the anti-slip component changes from a tightened state to a relaxed state, thereby being able to drive the anti-slip component to move, thereby facilitating the removal of the cargo on the hook body. The present invention has a simple structure and is easy to operate, can stably limit the cargo on the hook body, prevent unhooking, and is easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the safety hook structure during the lifting process of the present invention;

[0014] Figure 2 This is a schematic diagram of the safety hook structure after lifting is completed in the present invention;

[0015] Figure 3 This is a schematic diagram of the safety hook structure when the hook is removed according to the present invention;

[0016] Among them: 1. Support frame; 2. Receiving groove; 3. Moving plate; 4. Mounting column; 5. Hook body; 6. Mounting groove; 7. Compression spring; 8. Connecting column; 9. Stop rod; 10. Slide groove; 11. Fixed rod; 12. Connecting rod; 13. Pressure spring; 14. Annular box; 15. Connecting pipe; 16. Liquid inlet; 17. Annular retaining ring. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Reference Figure 1-3 The present invention provides a safety hook for a crane, comprising a support frame 1, a receiving groove 2 being provided in the support frame 1, a moving plate 3 being slidably connected in the receiving groove 2, a mounting column 4 being fixedly connected to the bottom surface of the moving plate 3, the mounting column 4 slidingly passing through the support frame 1, a hook body 5 being fixedly connected to the bottom of the mounting column 4, and an anti-slip component being installed on the mounting column 4 corresponding to the hook body 5; a mounting groove 6 being provided on the bottom wall of the receiving groove 2, a compression spring 7 being fixedly connected between the bottom surface of the moving plate 3 and the bottom surface of the mounting groove 6, and the compression spring 7 being located around the mounting column 4; a connecting column 8 being rotatably connected to the top surface of the support frame 1. By providing an installation column 4 that can slide up and down in the accommodating groove 2, the installation column 4 is stabilized at the bottom of the accommodating groove 2 due to the gravity of the heavy object during the lifting process, thereby tightening the anti-slip component, and the anti-slip component is stabilized between the installation column 4 and the hook body 5, effectively preventing the hook from being unhooked due to shaking; when the lifting work is completed and the heavy object is put down, the moving plate 3 moves to the top of the accommodating groove 2 under the action of the compression spring 7. At this time, the anti-slip component changes from a tightened state to a relaxed state, thereby being able to drive the anti-slip component to move, thereby facilitating the removal of the goods on the hook body 5.

[0020] To further optimize the solution, the anti-slip assembly includes a baffle 9 rotatably connected to the mounting column 4, and a slide groove 10 adapted to the baffle 9 is provided on the hook body 5. The end of the baffle 9 away from the mounting column 4 is located in the slide groove 10, and the baffle 9 is arranged in contact with the side wall of the slide groove 10; a tensioning assembly is installed on the bottom surface of the support frame 1 corresponding to the baffle 9.

[0021] To further optimize the solution, the tensioning assembly includes a fixed rod 11 fixedly connected to the bottom surface of the support frame 1, and a plurality of connecting rods 12 are rotatably connected between the fixed rod 11 and the middle part of the blocking rod 9. The plurality of connecting rods 12 are in a vertical state during the lifting process, and a pressure spring 13 is fixedly connected between any connecting rod 12 and the mounting column 4. The pressure spring 13 can apply pressure to the connecting rod 12, so that after the lifting is completed, the plurality of connecting rods 12 can bend and will not get stuck. During the process, the connecting rod 12 is in a vertical state, which can prevent the blocking rod 9 from moving downward, and the blocking rod 9 cannot move upward due to the limit of the side wall of the slide 10, thereby limiting the blocking rod 9 and increasing the stability during the lifting process.

[0022] In a further optimized solution, an annular box 14 is fixedly connected to the top surface of the support frame 1, and the connecting column 8 is located inside the annular box 14. A connecting pipe 15 is provided between the annular box 14 and the top wall of the receiving tank 2. Hydraulic oil is contained in the annular box 14, and a liquid inlet 16 is provided on the top surface of the annular box 14. By containing hydraulic oil in the annular box 14, the hydraulic oil fills the space above the receiving tank 2. When an impact or other shaking or vibration occurs during the lifting process, the mounting column 4 will not jump up and down under the action of the hydraulic pressure, thereby ensuring its stability during the lifting process.

[0023] Further optimizing the solution, the top surface of the support frame 1 is fixedly connected with an annular retaining ring 17, which is located outside the annular box body 14. The annular retaining ring 17 can protect the annular box body 14 and prevent the annular box body 14 from colliding with the outside world during the lifting process.

[0024] A further optimization scheme is to use three connecting rods 12 between each fixing rod 11 and the blocking rod 9. The length of the connecting rods 12 is 6-8 cm, while the length of the blocking rod 9 is 22-26 cm. This ensures that the connecting rods 12 are in a vertical position during lifting, thereby limiting the blocking rod 9 from moving downward and improving stability during lifting.

[0025] The working process of the present invention is as follows: during the lifting process, the cargo pulls the mounting post 4 downward under the action of its gravity, and the mounting post 4 drives the moving plate 3 to move downward. The moving plate 3 squeezes the compression spring 7. At the same time, the mounting post 4 pulls the connecting rod 12 downward during the downward movement, so that the connecting rod 12 is in a vertical state. At this time, the connecting rod in the vertical state limits the blocking rod 9, and the blocking rod 9 cannot move downward due to external shaking, thereby ensuring that the hook will not be unhooked. When the lifting is completed, the cargo falls to the ground and no longer pulls the mounting post 4 downward. The mounting post 4 and the moving plate 3 move to the top of the receiving groove 2 under the action of the compression spring 7. At this time, the multiple connecting rods 12 are in a bent state and no longer limit the blocking rod 9, so that the blocking rod 9 can be pushed downward, making it easy to remove the hook for lifting the cargo.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A crane safety hook, characterized by: The invention comprises a support frame (1), wherein a receiving groove (2) is provided in the support frame (1), a moving plate (3) is slidably connected in the receiving groove (2), a mounting column (4) is fixedly connected to the bottom surface of the moving plate (3), the mounting column (4) is slidably passed through the support frame (1), a hook body (5) is fixedly connected to the bottom of the mounting column (4), and an anti-slip component is installed on the mounting column (4) corresponding to the hook body (5); a mounting groove (6) is provided on the bottom wall of the receiving groove (2), a compression spring (7) is fixedly connected between the bottom surface of the moving plate (3) and the bottom surface of the mounting groove (6), and the compression spring (7) is located on the peripheral side of the mounting column (4); and a connecting column (8) is rotatably connected to the top surface of the support frame (1).

2. The crane safety hook according to claim 1, characterized in that: The anti-slip assembly includes a baffle (9) rotatably connected to the mounting column (4); a slide groove (10) adapted to the baffle (9) is provided on the hook body (5); the end of the baffle (9) away from the mounting column (4) is located in the slide groove (10); the baffle (9) is arranged in contact with the side wall of the slide groove (10); a tensioning assembly is installed on the bottom surface of the support frame (1) corresponding to the baffle (9).

3. The crane safety hook according to claim 2, characterized in that: The tensioning assembly includes a fixing rod (11) fixedly connected to the bottom surface of the support frame (1), a plurality of connecting rods (12) are rotatably connected between the fixing rod (11) and the middle part of the blocking rod (9), and the plurality of connecting rods (12) are in a vertical state during the lifting process, and a pressure spring (13) is fixedly connected between any of the connecting rods (12) and the mounting column (4).

4. The crane safety hook according to claim 1, characterized in that: The top surface of the support frame (1) is fixedly connected to an annular box body (14), the connecting column (8) is located inside the annular box body (14), a connecting pipe (15) is provided between the annular box body (14) and the top wall of the receiving groove (2), hydraulic oil is contained in the annular box body (14), and a liquid inlet (16) is provided on the top surface of the annular box body (14).

5. The crane safety hook according to claim 4, characterized in that: An annular retaining ring (17) is fixedly connected to the top surface of the support frame (1), and the annular retaining ring (17) is located outside the annular box body (14).

6. The crane safety hook according to claim 3, characterized in that: The number of connecting rods (12) between each fixing rod (11) and the blocking rod (9) is three, and the length of the connecting rod (12) is 6-8 cm; the length of the blocking rod (9) is 22-26 cm.

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