Safety anti-falling protection device for electric hoist

Abstract

The utility model relates to the technical field of electric hoists, and particularly discloses a safety anti-falling protection device for an electric hoist, which comprises a steel rope with a lifting ring, and the lifting ring and the steel rope are integrally formed; the anti-falling device further comprises a lifting hook and an anti-falling assembly detachably connected with the lifting hook, and the anti-falling assembly is connected with the lifting ring; the anti-falling assembly comprises a column body connected with the lifting hook, a notch formed in the column body and used for sleeving the lifting ring and a plurality of bearing columns arranged in the notch and making contact with the lifting ring, and the problem that connection between a steel rope and the lifting hook in some single-chain electric hoists is damaged, and then the lifting hook falls off is solved.

Description

Technical Field

[0001] The present application relates to the technical field of electric hoists, and specifically discloses a safety anti-fall protection device for electric hoist cranes. Background Art

[0002] Electric block is a special lifting equipment installed on overhead crane and gantry crane;

[0003] Electric hoists consist of two parts: mechanical and electrical. They include ultra-high-lift electric hoists, subway electric hoists, and high-speed electric hoists. They are compact, lightweight, simple to operate, and easy to use, making them suitable for industrial and mining enterprises, warehouses, docks, and other locations. They operate by supplying power via a busbar, using a handle to control the hoist's lifting and traveling motors through a control circuit within a control box to achieve the purpose of lifting equipment. Most electric hoists are operated by a person using buttons on the ground, or they can be operated from the driver's cab or remotely controlled by wired (or wireless) technology.

[0004] Regarding the electric hoist, that is, the electric hoist rope, the electric hoist rope is provided with a hook, and the height of the electric hoist rope is changed by the lifting motor;

[0005] The working principle of an electric hoist: It uses an AC or DC motor as a power source. The motor receives electrical energy from a power supply and converts it into mechanical energy to drive the movement of the hoist hook. Since electric hoists are usually used to lift heavy objects, there is a risk of damage. Common damages include: 1. The steel rope is overloaded and breaks; 2. The main connection of the electric hoist fails, causing the entire electric hoist to fall; 3. Damage between the steel rope and the hook causes the steel rope to separate from the hook, and then the hook falls.

[0006] Regarding the first and second problems, with the improvement of structure and materials, the first and second problems are basically not likely to occur. The most likely problem is the third problem. The reason is that the steel rope is manufactured as an integrated whole, while the hook is not integrated with the steel rope. There is an assembly relationship with the steel rope to achieve the connection with the steel rope. As long as there is an assembly relationship, there is a risk of wear or quality problems in the assembly, which may lead to the hook falling.

[0007] Later, as technology improved, the chain rope was invented. The hook was fixed by the ring of the chain rope, so that the load of the hook was applied entirely to the guide chain rope. This design required the shape of the hook to be designed to have a ring groove that could fit the chain rope.

[0008] This approach is desirable, but the cost is high, mainly due to the cost of the chain rope and the cost change of the lifting mechanism of the electric hoist. Because the lifting mechanism of the electric hoist is not a simple drum lifting and lowering, but requires the simultaneous lifting and lowering of the two ends of the chain to achieve the lifting and lowering of the hook;

[0009] Moreover, currently small electric hoists still use a single-chain steel rope and a basic drum lifting and lowering mode. In order to solve the separation problem between the hook and the steel rope, which leads to the hook falling, the inventor has invented an electric hoist safety anti-fall protection device in view of this. Utility Model Content

[0010] The utility model aims to solve the problem that the connection between the steel rope and the hook in some single-chain electric hoists is damaged, thereby causing the hook to fall.

[0011] In order to achieve the above objectives, the present invention provides the following basic solutions:

[0012] An electric hoist crane safety anti-fall protection device comprises a steel rope with a lifting ring, wherein the lifting ring and the steel rope are integrally formed;

[0013] It also includes a hook and an anti-slip assembly detachably connected to the hook, wherein the anti-slip assembly is connected to the lifting ring;

[0014] The anti-slip assembly comprises a column connected with the hook, a notch opened on the column for inserting the lifting ring, and a plurality of bearing columns arranged in the notch and in contact with the lifting ring.

[0015] The principles and effects of this basic solution are:

[0016] 1. Compared with the existing technology, this device has a simple structure and ingenious design. The improvement of this device lies in the steel rope structure. The steel rope structure has a lifting ring and the lifting ring and the steel rope are integrally formed. Single-chain steel rope is still used, but more lifting rings are designed to achieve uniform strength after the lifting ring and the lifting ring and the steel rope are integrally formed.

[0017] 2. Compared with the existing technology, this device is equipped with an anti-slip component, which is detachably connected to the hook. The anti-slip component is connected to the steel rope to achieve reasonable installation and disassembly of the steel rope.

[0018] 3. Compared with the prior art, the anti-falling assembly includes a column connected to the hook, a notch on the column for the lifting ring to be inserted, and a number of bearing columns in contact with the lifting ring arranged in the notch. A plurality of bearing columns are provided to gradually receive the steel rope. Even if a bearing column suddenly breaks, there are still remaining bearing columns to receive the steel rope. Even if all the remaining bearing columns suddenly break, there are still parts of the column without notches to receive the steel rope, so that the hook does not fall off. When the hook does not fall off, the hook will not fall, which naturally solves the problem of damage to the connection between the steel rope and the hook in some single-chain electric hoists, which in turn causes the hook to fall.

[0019] Furthermore, an external thread connection is provided on the outer periphery of the column, and a thread groove is provided on the top of the hook, and the thread groove is threadedly connected to the external thread.

[0020] Furthermore, the bearing column is a cylinder, and the longitudinal cross-sectional area of the bearing column is larger than the longitudinal cross-sectional area of the hanging ring.

[0021] Furthermore, the number of the supporting columns is at least three, and the supporting columns are arranged in sequence along the central axis of the column.

[0022] Furthermore, the strength of the steel rope is not less than 2000 MPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic structural diagram of a hook in a safety anti-fall protection device for an electric hoist crane proposed in an embodiment of the present application is shown;

[0025] Figure 2 A schematic diagram showing the structure of a steel rope in a safety anti-fall protection device for an electric hoist crane proposed in an embodiment of the present application is shown;

[0026] Figure 3 A front view of a column in a safety anti-fall protection device for an electric hoist crane proposed in an embodiment of the present application is shown;

[0027] Figure 4 A schematic diagram of the column structure of an electric hoist safety anti-fall protection device proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0029] The reference numerals in the drawings of the specification include: hook 1, column 2, steel rope 3, lifting ring 4, bearing column 5, external thread 6.

[0030] Implementation example Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown:

[0031] An electric hoist crane safety anti-fall protection device comprises a steel rope 3 with a lifting ring 4, wherein the lifting ring 4 and the steel rope 3 are integrally formed;

[0032] It also includes a hook 1 and an anti-slip assembly detachably connected to the hook 1, wherein the anti-slip assembly is connected to the lifting ring 4;

[0033] The anti-drop assembly includes a column 2 connected to the hook 1, a notch opened on the column 2 for inserting the lifting ring 4, and a plurality of bearing columns 5 arranged in the notch and in contact with the lifting ring 4.

[0034] Specifically: the outer periphery of the column 2 is provided with an external thread 6 for connection, and the top of the hook 1 is provided with a thread groove, and the thread groove is threadedly connected to the external thread 6 to achieve a detachable connection between the anti-drop assembly and the hook 1;

[0035] In order to ensure the strength of the steel rope 3, the strength of the steel rope 3 is not less than 2000Mpa. The load-bearing column 5 is a cylinder. The longitudinal cross-sectional area of the load-bearing column 5 is larger than the longitudinal cross-sectional area of the lifting ring 4, so that the lifting ring 4 can better bear the load. The number of load-bearing columns 5 is at least three, and the load-bearing columns 5 are arranged in sequence along the central axis direction of the column 2.

[0036] Even if one of the load-bearing columns 5 breaks suddenly, there are still remaining load-bearing columns 5 to support the steel rope 3. Even if all the remaining load-bearing columns 5 break suddenly, there are still parts of the column 2 without gaps to support the steel rope 3, so that the hook 1 will not fall off. When the hook 1 does not fall off, the hook 1 will not fall, which naturally solves the problem of damage to the connection between the steel rope 3 and the hook 1 in some single-chain electric hoists, which in turn causes the hook 1 to fall.

[0037] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An electric hoist crane safety anti-fall protection device, characterized by: It comprises a steel rope with a lifting ring, wherein the lifting ring and the steel rope are integrally formed; It also includes a hook and an anti-slip assembly detachably connected to the hook, wherein the anti-slip assembly is connected to the lifting ring; The anti-slip assembly comprises a column connected with the hook, a notch opened on the column for inserting the lifting ring, and a plurality of bearing columns arranged in the notch and in contact with the lifting ring.

2. The electric hoist crane safety anti-fall protection device according to claim 1 is characterized in that: An external thread connection is provided on the outer periphery of the column, and a thread groove is provided on the top of the hook, and the thread groove is threadedly connected to the external thread.

3. The electric hoist crane safety anti-fall protection device according to claim 1 is characterized in that: The bearing column is a cylinder, and the longitudinal cross-sectional area of the bearing column is larger than the longitudinal cross-sectional area of the hanging ring.

4. The electric hoist crane safety anti-fall protection device according to claim 3 is characterized in that: The number of the supporting columns is at least three, and the supporting columns are arranged in sequence along the central axis of the column.

5. The electric hoist crane safety anti-fall protection device according to claim 1, characterized in that: The strength of the steel rope is not less than 2000Mpa.

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