Hook unhooking device

Abstract

The utility model relates to a lifting hook unhooking device, and belongs to the technical field of lifting tools. Comprising a main hook, an auxiliary hook and a clamping plate, the auxiliary hook is vertically hinged to one end of the main hook; the clamping plate is horizontally hinged to the middle of the main hook; one end of the auxiliary hook is a bent hook, and the other end is provided with a bulge which can be clamped and matched with the clamping plate; a groove which can be clamped and matched with the clamping plate is formed in the horizontal lower side surface of the clamping plate; a pull ring rope hole is formed in one end of the clamping plate. According to the device, the clamping plate is matched with the auxiliary hook, the auxiliary hook rotates under the action of the pull rope and gravity, and therefore unhooking is achieved, operation is convenient, the structure is simple and reasonable, and working performance is stable.

Description

Technical Field

[0001] The utility model relates to a hook unhooking device, belonging to the technical field of hoisting tooling. Background Art

[0002] The motor rotor and motor shaft are shrink-fitted, creating an interference fit. When a motor shaft fails, it must be replaced. Because of this interference fit, removing the shaft from the rotor is difficult. Some companies use boring machines to remove the motor shaft, but this process takes a long time and is expensive, making it suitable only for high-value rotors. Others use presses, but this can easily damage and break the rotor, rendering it scrapped. Our company currently uses a medium-frequency heating process, which allows for perfect motor shaft removal. However, due to equipment limitations, this only works for low-power motors. For high-power motors, such as those with H315 poles or higher, we are unable to remove the rotor and are forced to replace the rotor, which is costly. Utility Model Content

[0003] The purpose of the utility model is to provide a hook unhooking device, which uses a crane, a rope and a unhooking device to perfectly cooperate to realize the unhooking device of the rotor shaft to solve the above technical problems.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A hook unhooking device comprises a main hook, an auxiliary hook and a clamping plate; the auxiliary hook is vertically hingedly arranged at one end of the main hook; the clamping plate is horizontally hingedly arranged in the middle of the main hook; one end of the auxiliary hook is a curved hook, and the other end is provided with a protrusion that can be clamped and matched with the clamping plate; a groove that can be clamped and matched with the clamping plate is provided on the horizontal lower side surface of the clamping plate; a pull ring rope hole is provided at one end of the clamping plate.

[0006] Further improvements to the technical solution of the present utility model are as follows: the hinge point between the clamping plate and the main hook is located at a non-midpoint position in the horizontal length, dividing the clamping plate into a long plate section and a short plate section; a pull ring rope hole is provided at the outer end of the long plate section; a counterweight block is provided at the outer end of the short plate section; and the groove is located in the area of ​​the short plate section.

[0007] A further improvement of the technical solution of the present utility model is that a lifting hole is provided on the other end of the main hook opposite to the auxiliary hook.

[0008] The further improvement of the technical solution of the utility model is as follows: the groove is a circular arc groove; the protrusion is a circular arc protrusion; and a rectangular groove is provided in communication with the circular arc groove.

[0009] A further improvement of the technical solution of the utility model is that a pull ring rope is connected and arranged in the pull ring hole.

[0010] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are as follows:

[0011] The hook unhooking device of the utility model is provided with a clamping plate and an auxiliary hook which are hingedly matched with the main hook. The auxiliary hook is clamped by the clamping plate, and the clamping plate can be rotated to disengage from the auxiliary hook, thereby achieving unhooking under the action of gravity.

[0012] The clamping plate of the utility model cooperates with the auxiliary hook through the groove and the protrusion, the clamping plate can swing horizontally, and the auxiliary hook is rotated by using the pull rope and gravity to achieve unhooking, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the main hook of the utility model;

[0015] Figure 3 This is a schematic diagram of the clamping plate of the utility model;

[0016] Figure 4 This is a schematic diagram of the auxiliary hook of the utility model;

[0017] Among them, 1. Main hook, 2. Auxiliary hook, 2-1. Protrusion, 3. Clamping plate, 3-1. Long board section, 3-2. Short board section, 4. Groove, 5. Pull ring hole, 6. Counterweight block, 7. Lifting hole. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0020] The utility model relates to a hook unhooking device, which is used during hoisting and can conveniently realize hook unhooking. In specific use, the overhead crane, the rope and the unhooking device are perfectly coordinated to realize rotor shaft retraction.

[0021] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, the device comprises a main hook 1, an auxiliary hook 2, and a clamping plate 3. The main hook 1 serves as the main body of the bracket. The auxiliary hook 2 and clamping plate 3 are both mounted on the main hook 1. The main hook 1 is vertically mounted, and the auxiliary hook 2 is hinged vertically at the lower end of the main hook 1. The clamping plate 3 is horizontally mounted and hingedly connected to the middle of the main hook 1. The clamping plate 3 can swing and rotate about its hinge point.

[0022] like Figure 4 As shown, the lower end of the auxiliary hook 2 is a curved hook, and the upper end of the auxiliary hook 2 is provided with a protrusion 2-1. Correspondingly, a groove 4 is provided on the horizontal lower side of the clamping plate 3. The upper end of the auxiliary hook 2 corresponds to the clamping plate 3. The protrusion 2-1 on the upper end of the auxiliary hook 2 can be snap-fitted with the groove 4 on the lower side of the clamping plate 3. After the two are engaged, the auxiliary hook 2, the clamping plate 3, and the main hook 1 are in a relatively stable state. When lifting objects, all three must be in a relatively stable state.

[0023] like Figure 3 As shown, a pull ring hole 5 is provided at one end of the clamping plate 3. Furthermore, during use, a pull ring rope is typically connected to the pull ring hole 5. The pull ring rope can be used to pull one end of the clamping plate 3, thereby causing the clamping plate 3 to swing and rotate about the hinge point. In a specific embodiment, a counterweight 6 is fixedly mounted at the other end of the clamping plate 3. Here, the counterweight 6 is arranged at both ends of the clamping plate 3 opposite the pull ring hole 5. The two weights cooperate to control the swing of the clamping plate 3, thereby controlling the unhooking of the auxiliary hook 2.

[0024] In a specific implementation, the hinge point between the clamping plate 3 and the main hook 1 is preferably located at a non-midpoint along its horizontal length. The clamping plate 3 is divided into a long plate section 3-1 and a short plate section 3-2, separated by the hinge point. The long plate section 3-1 is slightly longer, while the short plate section 3-2 is slightly shorter. A pull ring hole 5 is provided at the outer end of the long plate section 3-1, while a counterweight 6 is provided at the outer end of the short plate section 3-2. The groove 4 is located in the area of ​​the short plate section 3-2.

[0025] Furthermore, the groove 4 is typically configured as a circular arc groove, and the protrusion 2-1 is configured as a circular arc protrusion. To facilitate smooth movement of the protrusion at the upper end of the auxiliary hook 2, a rectangular groove may be provided at the outer end of the circular arc groove in a connected structure, that is, the circular arc groove and the arc groove are integrally connected. The rectangular groove is mostly located in the region of the long plate section 3-2.

[0026] The device is provided with a hoisting hole 7 at the upper end 1 of the main hook 1 , and is hung on the overhead travelling crane through the hoisting hole 7 .

[0027] like Figure 1As shown, the main hook 1 is hung on the overhead crane, and the clamping plate 3 clamps the auxiliary hook 2. Due to the self-gravity of the auxiliary hook 2, the clamping plate 3 clamps the auxiliary hook and locks it, so that heavy objects can be hoisted; when it is necessary to unhook, pull the pull rope hanging on the pull ring hole 5 to make the clamping plate 3 move downward, and the auxiliary hook 2 cannot be clamped. The auxiliary hook 2 rotates to the right under the action of gravity, causing the heavy object to fall off automatically.

[0028] The device can achieve unhooking by using the cooperation of the clamping plate and the auxiliary hook and utilizing the pull rope and gravity to rotate the auxiliary hook. The device has the advantages of easy operation, simple and reasonable structure and stable working performance.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A hook unhooking device, characterized in that: The invention comprises a main hook (1), an auxiliary hook (2) and a clamping plate (3); the auxiliary hook (2) is vertically hingedly arranged at one end of the main hook (1); the clamping plate (3) is horizontally hingedly arranged at the middle of the main hook (1); one end of the auxiliary hook (2) is a bent hook, and the other end is provided with a protrusion (2-1) capable of being clamped and matched with the clamping plate (3); a groove (4) capable of being clamped and matched with the clamping plate (3) is provided on the horizontal lower side surface of the clamping plate (3); and a pull ring rope hole (5) is provided at one end of the clamping plate (3).

2. A hook-unhooking device according to claim 1, characterized in that: The hinge point of the clamping plate (3) and the main hook (1) is located at a non-midpoint position on the horizontal length, dividing the clamping plate (3) into a long plate section (3-1) and a short plate section (3-2); a pull ring rope hole (5) is provided at the outer end of the long plate section (3-1); a counterweight block (6) is provided at the outer end of the short plate section (3-2); and the groove (4) is located in the area of ​​the short plate section (3-2).

3. The hook-unhooking device according to claim 1, characterized in that: A lifting hole (7) is provided on the other end of the main hook (1) opposite to the auxiliary hook (2).

4. The hook-unhooking device according to claim 1, characterized in that: The groove (4) is a circular arc groove; the protrusion (2-1) is a circular arc protrusion; and a rectangular groove is provided in communication with the circular arc groove.

5. The hook-unhooking device according to claim 1, characterized in that: A pull ring rope is connected and arranged inside the pull ring hole (5).

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