KR200218115Y1 - Shock-absorbing device for wire when rising crane-hook - Google Patents

Abstract

The present invention is designed to protect the heavy baggage and to carry out safer operations by absorbing the shock internally without impacting the baggage. It relates to a wire impact alleviating device for hoisting crane hook, comprising: a cylinder installed inside a lower side of a case to which a hook is fixed; A piston embedded in the cylinder and fixed to an upper end of the hook; A hydraulic fluid storage tank fixed to one outer surface of the case and storing hydraulic fluid in communication with the inside of the cylinder by a connecting pipe; A flow regulating valve fixed to a part of the connecting pipe to adjust a flow rate of the working oil flowing between the cylinder and the working oil storage tank; The compressed air storage tank is fixed to one outer surface of the case in the same manner as the hydraulic oil storage tank, and is connected to the hydraulic oil storage tank by a connecting pipe, and stores the compressed air supplied in communication with the compressed air supply unit.

This invention provides the effect of ensuring the safety of the baggage and extend the life of the crane hook and wire rope.

Description

SHOCK-ABSORBING DEVICE FOR WIRE WHEN RISING CRANE-HOOK}

The present invention relates to a crane hook, and more particularly, to protect a heavy baggage by absorbing the impact internally without impact directly on the baggage caused by driving carelessness and other adverse working conditions when moving and transporting the baggage The present invention relates to a wire shock alleviation device for hoisting crane hooks that can perform safer work.

Conventional crane hooks, as shown in Figures 1 to 2, the pulley (S) is wound around the wire rope (W), the case (C) is fixed to the shaft (1) by the pulley (S), It is provided at the lower end of the case (C) and comprises a hook (2) for lifting and lowering the baggage (3) to be fixed.

Since the crane hook is not provided with a shock absorbing means to alleviate the impact load, the impact load generated when the heavy load 3 is hoisted is transferred to the baggage 3 as it is, resulting in damage or damage to the baggage 3. It can lead to damage of wire rope (W) and shorten the life of equipment and wire rope (W). Also, if a large impact load is generated due to inadvertent operation during the movement of important equipment or equipment that requires safety, large safety The problem that caused the accident was exposed.

The present invention has been devised to solve the problems in view of the above-described prior art, and is provided with a cushioning means that can mitigate the impact load on the crane hook to secure the safety of the baggage and the crane hook and the wire rope. It is an object of the present invention to provide a wire impact alleviation device for hoisting crane hooks that can extend the service life.

1 is a cross-sectional view showing main parts of an internal structure of a crane hook according to the related art;

2 is an external perspective view of FIG. 1;

3 is a partial cross-sectional view showing an installation of the impact relief device of the crane hook according to the present invention,

4 is an external perspective view of FIG. 3;

Figure 5 is an exploded perspective view of the main part of the crane hook is installed shock absorbing device according to the present invention,

6 and 7 is an operating state of the crane hook is installed shock absorbing device according to the present invention.

Explanation of symbols on the main parts of the drawings

2: hook, 10: cylinder,

14: piston, 20: oil storage tank,

22: compressed air storage tank, 26a, 26b: connector,

28a: flow control valve, 28b, 28c: check valve,

30: compressed air supply part, 50: working oil,

C: case.

The above object of the present invention and the cylinder is installed inside the lower side of the case to which the hook is fixed; A piston embedded in the cylinder and fixed to an upper end of the hook; A hydraulic fluid storage tank fixed to one outer surface of the case and storing hydraulic fluid in communication with the inside of the cylinder by a connecting pipe; A flow regulating valve fixed to a part of the connecting pipe to adjust a flow rate of the working oil flowing between the cylinder and the working oil storage tank; Achievement by comprising a compressed air storage tank fixed to one outer surface of the case in the same manner as the hydraulic oil storage tank and connected to the hydraulic oil storage tank by a connection pipe and in communication with the compressed air supply unit for storing the compressed air supplied. do.

Hereinafter, a preferred embodiment according to the present invention will be described in more detail based on the accompanying drawings.

Figure 3 is one side cross-sectional view showing the impact relief device of the crane hook according to the present invention, Figure 4 is a perspective view of the main portion showing the impact relief device of the crane hook according to the present invention, Figure 5 is the structure of the impact relief device according to the present invention Is an exploded perspective view showing some.

3 to 5, a case (C) constituting the body of the crane hook is provided, the hook (2) is fixed to the case (C) so as to be able to hang the weight of the baggage to be hydraulically movable.

In the upper side of the case (C), the pulley (S) is rotatably fixed to the shaft (1), the wire rope (W) is wound around the pulley (S).

In the lower side of the case C, the cylinder body 12 in which the cylinder 10 is formed is welded and fixed.

A cylinder 14 is built in the cylinder 10 so as to be able to move up and down, and the piston 14 is fixed to the upper end of the hook 2.

The upper and lower outer peripheries of the piston 14 are each provided with a packing 16 having a 'V' shape. The packing 16 seals between the piston 14 and the cylinder 10 to seal the inside of the cylinder 10. Prevent pressure from leaking outside.

In addition, the lower end of the cylinder 16 is provided with a snap ring 18 for supporting the packing 16, which is a sealing means, so as not to fall off, and the hook 2 and the cylinder in the lower side adjacent to the snap ring 18 (10) A separate packing 16 is provided for sealing the liver.

The lower portion of the packing 16 has a bushing 17 for preventing wear due to the flow of the hook (2).

The interior of the cylinder 10 is preferably plated with chromium after precision processing to improve the sealability and durability.

In addition, the lower periphery of the cylinder 10 is formed through the cylinder body 12 to form a hole and threaded through the hole for the hydraulic fluid to pass through the discharge port 19 is formed, the supply outlet 19 is a hydraulic oil It is connected with the flow pipe 26a.

One side outer surface of the case (C) is provided with an oil storage tank 20 and a compressed air storage tank 22, each tank 20, 22 is fixed to the case (C) by a fixing band 24 do.

The connecting pipe (26a) is installed in communication with the lower end of the oil storage tank 20, a separate connection pipe (26b) between the upper end of the oil storage tank 20 and the lower end of the compressed air storage tank (22). Are connected to communicate with each other.

On the other hand, a part of the connecting pipe 26b is provided with a flow control valve 28a, and a check valve 28b is connected in parallel with the flow control valve 28a.

The flow control valve 28a is provided to adjust the flow rate of the oil to adjust the operating speed, the check valve 28b is provided to prevent the back flow of the working oil.

The upper end of the compressed air storage tank 22 is connected to the compressed air supply unit having a small compressor by a connection pipe having a separate check valve 28c.

The operating relationship of the present invention made with such a configuration will be described in detail with reference to FIGS. 6 to 7.

In the no-load state in which the hook 2 is not loaded, as shown in FIG. 6, the pressure of the compressed air supplied from the compressed air supply unit 30 passes through the connecting pipe 26b from the compressed air storage tank 22 to the oil storage tank ( 20 is supplied to the hydraulic fluid 50 stored in the tank 20 into the cylinder 10.

Inside the cylinder 10, which is a closed space, the piston 14 is pushed upward of the cylinder 10 due to the hydraulic pressure generated by the inflow of the hydraulic oil 50.

At this time, the required pressure is enough to overcome the weight of the hook 2 and the piston 14 combined.

That is, it can be seen that the pressure * the working area of the piston (piston area-the cross-sectional area of the hook) is larger than (the hook's own weight + the piston's own weight), which can be set in advance, which is a small compressor of the compressed air supply unit 30. Adjustable through

If the load is applied to the hook 2, as shown in FIG. 7, the weight of the heavy chain baggage overcomes the pressure in the cylinder 10 and the hook 2 is moved downward.

Therefore, the piston 14 is moved downward to push the hydraulic oil 50 introduced into the cylinder 10.

At this time, the hydraulic oil 50 is returned to the oil storage tank 20 by the connecting pipe (26a), by adjusting the flow control valve 28a to facilitate the time and speed of the hook (2) to move downwards You can control it.

That is, the impact load of the baggage can be absorbed through the hydraulic oil 50 filled between the cylinder 10 and the oil storage tank 20.

In this process, the check valve 28b speeds up the speed at which the piston 14 moves upward when no load is applied, and makes it possible to further slow down the downward movement speed of the piston 14 when loaded.

In addition, the compressed air supply unit 30 may be provided with an air compressor or a pressure gauge so as to maintain an appropriate pressure at all times when necessary to prevent the internal loss of the compressed air to decrease the pressure.

Through this process, it is possible to easily absorb and mitigate the impact load generated when the baggage of the heavy body is hoisted by a crane hook.

As described above in detail, the impact mitigation device according to the present invention generates an instantaneous impact load when transporting and transporting heavy materials, thereby safely and easily absorbing and mitigating impacts without fear of damaging the crane hook or damaging the wire rope. It can be transported and transported.

Claims (2)

A cylinder 10 installed inside the lower side of the case 10 to which the hook 2 is fixed; A piston (14) embedded in the cylinder (10) and fixed to an upper end of the hook (2); A hydraulic fluid storage tank 20 which is fixed to one outer surface of the case 10 and stores hydraulic fluid 50 which is in communication with the inside of the cylinder 10 by a connecting pipe 26a; A flow control valve (28a) fixed to a part of the connection pipe (26a) to regulate the flow rate of the hydraulic oil (50) flowing between the cylinder (10) and the hydraulic oil storage tank (20); Compression fixed to one outer surface of the case 10 in the same manner as the hydraulic oil storage tank 20 and connected to the hydraulic oil storage tank 20 by a connecting pipe 26b and communicated with the compressed air supply unit 30. Crane shock lifting device, characterized in that it comprises a compressed air storage tank 22 for storing air. 2. The device of claim 1, wherein the connecting pipe (26a) is provided with a check valve (28b) in parallel with the flow control valve (28a).