Anti-unhooking device for crane hook

Abstract

The utility model discloses a crane hook anti-unhooking device which comprises a hook and a through hole, the through hole is formed in the side wall of the hook, anti-unhooking mechanisms are inserted into the front end and the rear end of the through hole, each anti-unhooking mechanism comprises an insertion cylinder, a connecting cylinder, a main rod body and an auxiliary rod body, the insertion cylinder is inserted into the through hole, the connecting cylinder and the auxiliary rod body are installed on the side wall of the insertion cylinder, and the main rod body is connected with the main rod body. A main rod body is installed in the connecting cylinder in a sliding mode, a connecting rope is installed at the end, located in the connecting cylinder, of the main rod body, the other end of the connecting rope is inserted into an auxiliary rod body, a sliding groove is formed in the side wall of the auxiliary rod body, a sliding block is installed in the sliding groove in a sliding mode, and the end, inserted into the auxiliary rod body, of the connecting rope is connected with the side wall of the sliding block. The anti-unhooking mechanism can stretch out and draw back, so that the length of the part, used for sealing the lifting hook, in the anti-unhooking mechanism can be adjusted, when the rope head is large, the lifting rope can be smoothly hung on the lifting hook, and the lifting rope cannot influence the movement of the anti-unhooking mechanism.

Description

Technical Field

[0001] This patent relates to the technical field of crane hooks, specifically a crane hook anti-unhooking device. Background Art

[0002] Cranes are used to lift and transport heavy objects. Ropes are tied to the heavy objects, and then the ropes are placed in the hooks. The heavy objects are lifted by the hooks on the crane. According to the technical specifications for safety of special equipment, the hooks of lifting equipment must be designed with anti-unhooking devices to prevent the heavy objects from falling off the hooks during the lifting process.

[0003] However, the existing anti-unhooking device has a fixed size. As a result, in actual use, if the rope head is large, it cannot be squeezed into the hook. After squeezing in, the anti-unhooking device cannot be moved out from one side of the rope head, resulting in the anti-unhooking device being unable to close the hook. Utility Model Content

[0004] The purpose of this patent is to provide a crane hook anti-unhooking device to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, this patent provides the following technical solutions: a crane hook anti-unhooking device, comprising a hook and a through hole, the side wall of the hook is provided with a through hole, and the front and rear ends of the through hole are both inserted and installed with an anti-unhooking mechanism;

[0006] The anti-unhooking mechanism comprises an inserting tube, a connecting tube, a main rod body and a secondary rod body, wherein the inserting tube is inserted and installed in the through hole, the connecting tube and the secondary rod body are installed on the side wall of the inserting tube, the inner cavity of the connecting tube is connected with the inner cavity of the inserting tube, the main rod body is slidably installed in the connecting tube, a connecting rope is installed at one end of the main rod body located in the connecting tube, and the other end of the connecting rope is inserted into the secondary rod body;

[0007] A slide groove is provided on the side wall of the auxiliary rod body, a slider is slidably installed in the slide groove, and one end of the connecting rope is inserted into the auxiliary rod body and connected to the side wall of the slider.

[0008] Preferably, the cross-sections of the main rod body and the auxiliary rod body are both L-shaped, and the outer sides of the main rod body and the auxiliary rod body are provided with external threads. The outer sides of the main rod body and the auxiliary rod body are installed with threaded barrels through threaded rotation, and the two main rod bodies are connected to each other through the threaded barrel, and the two auxiliary rod bodies are connected to each other through the threaded barrel.

[0009] Preferably, a fixing ring is installed on the inner wall of the connecting tube, one end of a main spring is installed on the side wall of the fixing ring, and the other end of the main spring is fittedly connected to the side wall of the main rod body.

[0010] Preferably, brackets are installed on the inner walls of the connecting tube and the auxiliary rod body, rollers are rotatably installed on the inner walls of the two brackets, and the connecting rope is in contact with the side walls of the rollers.

[0011] Preferably, a limit block is installed at one end of the main rod body inserted into the connecting tube, and the limit block can slide in the connecting tube. The connecting rope is installed on the side wall of the limit block. The side wall of the limit block is provided with a sliding groove, and a protrusion is installed in the sliding groove. A secondary spring is installed in the sliding groove, and the secondary spring is in contact with the side wall of the protrusion. The side wall of the connecting tube is provided with a positioning hole, and the protrusion can be inserted into the positioning hole.

[0012] Preferably, it also includes a bolt, which passes through the side walls of the two insert tubes and is inserted into the through hole, and a nut is screwed and installed on the outer side of the bolt.

[0013] Compared with the prior art, the beneficial effects of this patent are:

[0014] The patent sets a connecting tube and a main rod body so that the anti-unhooking mechanism can be extended and retracted, so that the length of the part used to close the hook in the anti-unhooking mechanism can be adjusted, so that when the rope head is large, the rope can be smoothly hung on the hook, and the rope will not affect the movement of the anti-unhooking mechanism, thereby improving the practicality of the device;

[0015] In addition, the device is further provided with a limit block on one side of the main rod body, and the cooperation between the protrusion in the limit block and the positioning hole can prevent the anti-unhooking mechanism from automatically retracting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of this patent.

[0017] Figure 2 This is a schematic diagram of the connecting tube structure of this patent.

[0018] Figure 3 This is a side sectional view of the patented anti-unhooking mechanism.

[0019] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle.

[0020] In the figure: 1 hook, 2 through hole, 3 anti-unhooking mechanism, 31 insert cylinder, 32 connecting cylinder, 33 main rod body, 34 auxiliary rod body, 4 connecting rope, 5 slide groove, 6 slider, 7 threaded cylinder, 8 fixing ring, 9 main spring, 10 bracket, 11 roller, 12 limit block, 13 sliding groove, 14 protrusion, 15 auxiliary spring, 16 positioning hole, 17 bolt, 18 nut. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Obviously, the described embodiments are only part of the embodiments of this patent, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0022] See also Figure 1-3 This patent provides a technical solution: a crane hook anti-unhooking device, comprising a hook 1 and a through hole 2, the side wall of the hook 1 is provided with a through hole 2, and the front and rear ends of the through hole 2 are both inserted and installed with an anti-unhooking mechanism 3;

[0023] The two sets of anti-unhooking mechanisms 3 can be spliced ​​together through the threaded tube 7 to form a complete anti-unhooking structure, which blocks the opening of the hook 1 and prevents the lifting rope from falling off the hook 1.

[0024] The anti-unhooking mechanism 3 includes an inserting cylinder 31, a connecting cylinder 32, a main rod body 33 and a secondary rod body 34. The inserting cylinder 31 is inserted and installed in the through hole 2. The connecting cylinder 32 and the secondary rod body 34 are installed on the side wall of the inserting cylinder 31. The inner cavity of the connecting cylinder 32 is connected to the inner cavity of the inserting cylinder 31. The main rod body 33 is slidably installed in the connecting cylinder 32. One end of the main rod body 33 located in the connecting cylinder 32 is installed with a connecting rope 4, and the other end of the connecting rope 4 is inserted into the secondary rod body 34.

[0025] By pulling the slider 6, the main rod body 33 can be driven to move in the connecting tube 32 through the connecting rope 4, so that the main rod body 33 is retracted into the connecting tube 32, thereby shortening the length of the anti-unhooking mechanism 3, so that the larger lifting rope can be smoothly hung on the hook 1, and the main rod body 33 is prevented from interfering with the hanging of the lifting rope;

[0026] A slide groove 5 is provided on the side wall of the auxiliary rod body 34 , a slider 6 is slidably installed in the slide groove 5 , and one end of the connecting rope 4 is inserted into the auxiliary rod body 34 and connected to the side wall of the slider 6 .

[0027] Specifically, the cross-sections of the main rod body 33 and the auxiliary rod body 34 are both L-shaped, and the outer sides of the main rod body 33 and the auxiliary rod body 34 are both provided with external threads. The outer sides of the main rod body 33 and the auxiliary rod body 34 are provided with threaded tubes 7 through threaded rotation. The two main rod bodies 33 are connected to each other through the threaded tube 7, and the two auxiliary rod bodies 34 are connected to each other through the threaded tube 7.

[0028] Since two anti-unhooking mechanisms 3 are provided in the device, and the two anti-unhooking mechanisms 3 are connected via a threaded tube 7, it is convenient to perform splicing, installation or disassembly.

[0029] Specifically, a fixing ring 8 is installed on the inner wall of the connecting tube 32, one end of a main spring 9 is installed on the side wall of the fixing ring 8, and the other end of the main spring 9 is closely connected to the side wall of the main rod body 33;

[0030] The main spring 9 pushes the main rod body 33 so that the main rod body 33 can be automatically reset under the action of the main spring 9 after being retracted.

[0031] Specifically, the inner walls of the connecting tube 32 and the auxiliary rod body 34 are both installed with brackets 10, and the inner walls of the two brackets 10 are both rotatably installed with rollers 11, and the connecting rope 4 is in contact with the side walls of the rollers 11;

[0032] The two rollers 11 can guide the connecting rope 4 to prevent the connecting rope 4 from being cut by the edge of the connection between the inserting tube 31 and the connecting tube 32 and the auxiliary rod body 34 , thereby increasing the service life of the connecting rope 4 .

[0033] Specifically, a limit block 12 is installed at one end of the main rod body 33 inserted into the connecting tube 32, and the limit block 12 can slide in the connecting tube 32. The connecting rope 4 is installed on the side wall of the limit block 12. A sliding groove 13 is provided on the side wall of the limit block 12. A protrusion 14 is installed in the sliding groove 13. A secondary spring 15 is installed in the sliding groove 13. The secondary spring 15 is in contact with the side wall of the protrusion 14. A positioning hole 16 is provided on the side wall of the connecting tube 32. The protrusion 14 can be inserted into the positioning hole 16.

[0034] When the protrusion 14 is inserted into the positioning hole 16 , the main rod body 33 is in a locked state and will not be retracted into the connecting tube 32 , thereby preventing the anti-unhooking mechanism 3 from releasing the blockage of the opening of the hook 1 .

[0035] Specifically, it also includes a bolt 17 , which passes through the side walls of the two insert tubes 31 and is inserted into the through hole 2 , and a nut 18 is screwed and installed on the outer side of the bolt 17 .

[0036] Working principle: When hanging the lifting rope on the hook 1, the staff first presses the protrusion 14 into the positioning hole 16 to release the positioning of the main rod body 33, and then pulls the slider 6 to drive the main rod body 33 to retract into the connecting tube 32 under the action of the connecting rope 4, so that the lifting rope can be smoothly hung on the hook 1. After the hanging is completed, the slider 6 is released, and the main rod body 33 is reset under the action of the main spring 9. At the same time, the protrusion 14 continues to be inserted into the positioning hole 16 to complete the hanging of the lifting rope.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A crane hook anti-unhooking device, comprising a hook (1) and a through hole (2), characterized in that: A through hole (2) is provided on the side wall of the hook (1), and anti-hooking mechanisms (3) are inserted and installed at both the front and rear ends of the through hole (2); The anti-unhooking mechanism (3) comprises an inserting cylinder (31), a connecting cylinder (32), a main rod body (33) and a secondary rod body (34); the inserting cylinder (31) is inserted and installed in the through hole (2); the connecting cylinder (32) and the secondary rod body (34) are installed on the side wall of the inserting cylinder (31); the inner cavity of the connecting cylinder (32) is connected to the inner cavity of the inserting cylinder (31); the main rod body (33) is slidably installed in the connecting cylinder (32); a connecting rope (4) is installed at one end of the main rod body (33) located in the connecting cylinder (32); the other end of the connecting rope (4) is inserted into the secondary rod body (34); The side wall of the auxiliary rod body (34) is provided with a slide groove (5), a slider (6) is slidably installed in the slide groove (5), and one end of the connecting rope (4) is inserted into the auxiliary rod body (34) and connected to the side wall of the slider (6).

2. A crane hook anti-unhooking device according to claim 1, characterized in that: The cross-sections of the main rod body (33) and the auxiliary rod body (34) are both L-shaped. External threads are provided on the outer sides of the main rod body (33) and the auxiliary rod body (34). Threaded cylinders (7) are installed on the outer sides of the main rod body (33) and the auxiliary rod body (34) through threaded rotation. The two main rod bodies (33) are connected to each other through the threaded cylinder (7), and the two auxiliary rod bodies (34) are connected to each other through the threaded cylinder (7).

3. The anti-unhooking device for a crane hook according to claim 1, characterized in that: A fixing ring (8) is installed on the inner wall of the connecting tube (32), one end of a main spring (9) is installed on the side wall of the fixing ring (8), and the other end of the main spring (9) is closely connected to the side wall of the main rod body (33).

4. The anti-unhooking device for a crane hook according to claim 1, characterized in that: The inner walls of the connecting tube (32) and the auxiliary rod body (34) are both installed with brackets (10), and the inner walls of the two brackets (10) are both rotatably installed with rollers (11), and the connecting rope (4) is in contact with the side walls of the rollers (11).

5. The anti-unhooking device for a crane hook according to claim 1, characterized in that: A limit block (12) is installed at one end of the main rod body (33) inserted into the connecting tube (32), and the limit block (12) can slide in the connecting tube (32). The connecting rope (4) is installed on the side wall of the limit block (12). The side wall of the limit block (12) is provided with a sliding groove (13), and a protrusion (14) is installed in the sliding groove (13). A secondary spring (15) is installed in the sliding groove (13), and the secondary spring (15) is in contact with the side wall of the protrusion (14). The side wall of the connecting tube (32) is provided with a positioning hole (16), and the protrusion (14) can be inserted into the positioning hole (16).

6. The anti-unhooking device for a crane hook according to claim 1, characterized in that: It also includes a bolt (17), which penetrates through the side walls of the two insert tubes (31) and is inserted into the through hole (2). A nut (18) is screwed on the outer side of the bolt (17).

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