Anti-unhooking device of crane

Abstract

The utility model belongs to the technical field of hoisting, and relates to an anti-unhooking device of a crane, which comprises a U-shaped round steel and a long rod handle, the U-shaped round steel is hinged and fixed at a hook neck of a lifting hook by matching a pin shaft with a pin shaft sleeve, the long rod handle is fixed on any pin shaft sleeve, and an included angle theta is formed between the long rod handle and the U-shaped round steel; on the basis of the gravity lever principle, the U-shaped round steel and the lifting hook are closed through the gravity of the long-rod handle. Under the normal condition, the short rod and the lifting hook are always closed, when the lifting hook is opened, only the gravity difference between the long rod handle and the U-shaped round steel (short rod) needs to be overcome upwards, so that the force for opening the short rod is far smaller than the torsion of a clamping piece type lifting hook anti-unhooking device for overcoming a spring, and the problems that a steel bar type long rod handle is limited by a hook head and has too many models and types can also be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting, and relates to an anti-unhooking device for a crane. Background Art

[0002] The design of the crane anti-unhooking device is to ensure that the wire rope at the crane hook can be kept in the correct position in various working environments to avoid the wire rope from being unhooked due to accidents or improper operation. The anti-unhooking device is to protect and prevent the wire rope from falling off the hook. Once the anti-unhooking hook device is damaged, it loses its protective function, which leads to unhooking accidents. At present, there are two main types of anti-unhooking devices on the market: card-type anti-unhooking devices mostly control the locking and opening of the card through spring torque. After hanging the heavy objects, the anti-unhooking device will automatically return to its position to achieve anti-unhooking protection. The steel bar anti-unhooking device locks the hook through the gravity lever type, manually realizes the anti-unhooking opening, and automatically realizes locking under the action of gravity.

[0003] Most of the card-type anti-unhooking sealing plates on the market are stamped from 1mm to 2mm iron plates. First, the axis of the sealing plate is hinged to the hook neck of the hook, and then the sealing plate is pressed against the hook by the torsion of the spring to achieve the effect of preventing unhooking. When the rigging needs to be removed, the sealing plate is manually pressed down to create a certain distance between the sealing plate and the hook, and the rigging can be removed. Most of the steel bar-type anti-unhooking sealing plates are surrounded by two U-shaped structures, one long and one short, with 12mm to 16mm round steel. The opening is welded at a certain angle to the pin shaft to form a whole, and fixed to the upper part of the hook head by a screw rod. The short U-shaped rod and the hook are closed by the gravity of the long U-shaped rod. Under normal circumstances, the short U-shaped rod and the hook are always closed. When opening, just lift the long rod.

[0004] However, both the card-type anti-unhooking device and the steel bar-type anti-unhooking device need to be implemented through specific structures such as springs and rotating fixed rods, and have the following disadvantages during use: for the card-type anti-unhooking device, when removing the rigging, it is necessary to manually overcome the torsion of the spring, which is more laborious for some large-tonnage hooks, and because the crane often collides during use, the sealing plate is easy to deform and fall off, and then loses its original function. For the steel bar-type anti-unhooking device, although it overcomes the disadvantages of the card-type being easy to change, fall off, and laborious, the width of the gravity long rod U-shaped rod is limited by the size of the hook head, and there are many models and it cannot be universal. Utility Model Content

[0005] The utility model aims to overcome the above-mentioned shortcomings of the prior art and provide a crane anti-unhooking device to solve the problem that the long U-shaped steel bar is limited by the hook head and has too many types and cannot be universally used.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] The anti-unhooking device for a crane comprises a U-shaped round steel and a long rod handle. The U-shaped round steel is hingedly fixed to the hook neck of a hook through a pin shaft and a pin shaft sleeve. The long rod handle is fixed on any pin shaft sleeve, and an angle θ is formed between the long rod handle and the U-shaped round steel. Based on the principle of gravity lever, the U-shaped round steel and the hook are closed by the gravity of the long rod handle.

[0008] Furthermore, the long rod handle is fixed to the pin sleeve by welding.

[0009] Furthermore, the angle θ is between 60° and 90°.

[0010] Furthermore, the long rod handle comprises a long rod made of round steel and a gravity ball installed on the end of the long rod.

[0011] Furthermore, the long rod includes a first long rod, a second long rod and a third long rod that are integrally formed, and the second long rod is perpendicular to the first long rod and the third long rod respectively.

[0012] Furthermore, the length of the second long rod is shorter than the length of the third long rod, and the length of the third long rod is shorter than the length of the first long rod.

[0013] Furthermore, the gravity ball is fixed on the end of the third long rod.

[0014] Furthermore, the length ratio of the first long rod to the third long rod is 5:1.

[0015] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects: this anti-unhooking device is composed of a U-shaped round steel and a handle, and a gravity ball is installed at the end of the handle. Based on the principle of gravity lever, the U-shaped round steel (short rod) and the hook are closed by the gravity of the long rod handle. Under normal circumstances, the short rod and the hook are always closed. When opening, it is only necessary to overcome the gravity difference between the long rod handle and the U-shaped round steel (short rod) upwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated into and constitute a part of this specification, and together with the description, are used to explain the principles of the present utility model.

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 A structural diagram of the crane anti-unhooking device provided by the utility model;

[0019] Figure 2 This is the working principle diagram of the crane anti-unhooking device.

[0020] Among them: 1. U-shaped round steel; 2. long rod handle; 21. long rod; 22. gravity ball; 211. first long rod; 212. second long rod; 213. third long rod; 3. pin sleeve. DETAILED DESCRIPTION

[0021] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples consistent with some aspects of the utility model described in detail in the attached claims.

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Example

[0024] See also Figures 1-2 As shown, this embodiment provides an anti-unhooking device for a crane, comprising a U-shaped round steel 1 and a long rod handle 2, wherein the U-shaped round steel 1 is hingedly fixed to the hook neck of the hook through a pin shaft and a pin shaft sleeve 3, and the long rod handle 2 is fixed on any pin shaft sleeve 3, and there is an angle θ between the long rod handle 2 and the U-shaped round steel 1; based on the principle of gravity lever, the gravity of the long rod handle 2 is used to achieve the closure of the U-shaped round steel 1 and the hook.

[0025] Specifically, the long rod handle 2 is fixed to the pin sleeve 3 by welding.

[0026] Specifically, the angle θ is between 60° and 90°, preferably 65°.

[0027] Specifically, the long rod handle 2 includes a long rod 21 made of round steel and a gravity ball 22 installed at the end of the long rod 21 .

[0028] Specifically, the long rod 21 includes a first long rod 211 , a second long rod 212 and a third long rod 213 that are integrally formed, and the second long rod 212 is perpendicular to the first long rod 211 and the third long rod 213 .

[0029] Specifically, the length of the second long rod 212 is less than the length of the third long rod 213, and the length of the third long rod 213 is less than the length of the first long rod 211. The length of the first long rod 211 is 260 mm to 560 mm, the length of the third long rod 213 is 100 mm, and the diameters of the first long rod 211, the second long rod 212, and the third long rod 213 are all 12 mm to 16 mm.

[0030] Specifically, the gravity ball 22 is fixed to the end of the third long rod 213. Preferably, the diameter of the gravity ball is 30 mm to 40 mm.

[0031] Specifically, the side length of the U-shaped round steel 1 is 90 mm to 230 mm, the diameter is 12 mm to 16 mm, and the distance between the bottom outer edges of the U-shaped round steel 1 is 40 mm to 100 mm.

[0032] Specifically, in this embodiment, the diameter of the round end of the pin sleeve 3 is 14 mm to 24 mm, and the diameter of the tip of the pin sleeve 3 is 10 mm to 16 mm. After actual installation, the distance between the outer ends of the two pin sleeves 3 is 80 mm to 200 mm.

[0033] The anti-unhooking device provided by the utility model is installed on a crane. The U-shaped round steel 1 is hingedly fixed to the hook neck of the hook through a pin shaft and a pin shaft sleeve 3. The long rod handle 2 is fixed on any pin shaft sleeve 3. The angle θ between the long rod handle 2 and the U-shaped round steel 1 is 65°. Based on the principle of gravity lever, the U-shaped round steel 1 and the hook are closed by the gravity of the long rod handle 2. Under normal circumstances, the U-shaped round steel 1 and the hook are always closed. When opening, it is only necessary to overcome the gravity difference between the long rod handle 2 and the U-shaped round steel 1 upwards.

[0034] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0035] It should be understood that the present invention is not limited to the above-described contents, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A crane anti-unhooking device, characterized in that: The invention comprises a U-shaped round steel (1) and a long rod handle (2), wherein the U-shaped round steel (1) is hingedly fixed to the hook neck of the hook through a pin shaft and a pin shaft sleeve (3), and the long rod handle (2) is fixed on any pin shaft sleeve (3), and an angle θ exists between the long rod handle (2) and the U-shaped round steel (1); based on the principle of gravity lever, the U-shaped round steel (1) and the hook are closed by the gravity of the long rod handle (2).

2. The anti-unhooking device for crane according to claim 1, characterized in that: The long rod handle (2) is fixed to the pin sleeve (3) by welding.

3. The crane anti-unhooking device according to claim 1, characterized in that: The angle θ is between 60° and 90°.

4. The crane anti-unhooking device according to claim 1, characterized in that: The long rod handle (2) comprises a long rod (21) made of round steel and a gravity ball (22) installed at the end of the long rod (21).

5. The crane anti-unhooking device according to claim 4, characterized in that: The long rod (21) comprises a first long rod (211), a second long rod (212) and a third long rod (213) which are integrally formed, and the second long rod (212) is perpendicular to the first long rod (211) and the third long rod (213) respectively.

6. The crane anti-unhooking device according to claim 5, characterized in that: The length of the second long rod (212) is shorter than the length of the third long rod (213), and the length of the third long rod (213) is shorter than the length of the first long rod (211).

7. The crane anti-unhooking device according to claim 5, characterized in that: The gravity ball (22) is fixed to the end of the third long rod (213).

8. The crane anti-unhooking device according to claim 5, characterized in that: The length ratio of the first long rod (211) to the third long rod (213) is 5:

1.

9. The anti-unhooking device for a crane according to claim 5, characterized in that: The diameters of the first long rod (211), the second long rod (212), and the third long rod (213) are all between 12 mm and 16 mm.

10. The crane anti-unhooking device according to claim 1, characterized in that: The diameter of the U-shaped round steel (1) is 12 mm to 16 mm.

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