KR100198156B1 - Clamping device for option working device of excavator - Google Patents

Abstract

The present invention relates to a clamping device of an optional work machine for an excavator, wherein a quick clamp (1) configured to safely mount or remove the optional work machine to the excavator is installed at the tip of the excavator arm, and the main bracket (2) of the quick clamp (1) is provided. Sliding groove (3) is formed in the) is installed so that the sliding plate (4) in a linear reciprocating motion in the sliding groove (3), the rotating pin (5) inserted and fixed to the connection portion of the sliding plate (4) The hook 6 is installed to be detachable, and the cylinder 7 for activating the rotation of the hook 6 at the rear of the hook 6 is connected and installed through the fixing pin 8, while the cylinder is installed. The safety valve 10 which is opened and closed by the flow rate which flows in through the connection hose 9 is installed in the back of (7), and it is structured so that the cylinder 7 may be advanced back and forth, and it may be fastened according to the kind of optional work machine. You can adjust the position accordingly. Writing, it is possible to quickly and easily replace the operating mechanism of the option to be performed in the front end of an excavator arm operation.

Description

Clamping device for the optional tool of excavator

The present invention relates to a clamping device for an optional work machine mounted on an excavator, and more particularly, to an excavator equipped with an optional work machine regardless of the type of the optional work machine mounted on the excavator and the pin distance of the bracket for mounting the optional work machine. A clamping device for an optional machine.

In general, excavators widely used in construction work sites can be diversified by installing various optional attachments including unique buckets installed on the excavator according to the buyer's requirements. These optional tools are intended to be mounted on the arm of the excavator by means of fastening pins and quick clamps.

That is, as shown in FIG. 2 (a) and FIG. 2 (b), the bucket 21 and the breaker 22 are the representative equipment of the optional work machine, and the bucket 21 and the breaker 22 are the excavators. Mounting brackets 21a and 22a are formed at the upper portion so as to be mounted on the pins, and pins (not shown) are inserted into the fastening holes 21b and 22b opened at a predetermined distance to the mounting brackets 21a and 22a. The bucket 21 or the breaker 22 is to be mounted to the arm tip of the excavator.

In addition, the optional working machine as described above is mounted to the arm of the excavator by the quick clamps 23 and 24 shown in FIGS. 3 (a) and 3 (b), and the quick clamps 23 and 24 are upper parts. The main brackets 25 and 26 are fastened to the mounting brackets 21a and 22a of the optional work machine, and the fastening holes 23a and 24a are opened at a predetermined distance therein, and the main brackets 25 and 26 are opened. The cylinders 27 and 28 which are fastened to the lower part of the hook are connected to the hooks 29 and 30, and the rotation pins 31 and 32 are installed in front of the hooks 29 and 30, and the cylinders 27 and 28 are installed. The hooks 29 and 30 are moved or moved to the rotary pins 31 and 32 by the forward movement of the hooks, and the optional tools are mounted or removed from the arm of the excavator by the operation of the hooks 29 and 30. Structure.

However, the distance between the fastening holes 23a and 24a formed in the main brackets 25 and 26 of the quick clamps 23 and 24 and the fastening holes 21b formed in the mounting brackets 21a and 22a of the optional work tool. Since it is possible to completely tighten only when the distances between 22b are identical, there is a burden to make the distance between the fastening holes A and A 'of the optional working tool to fit the quick clamps 23 and 24.

In addition, the quick clamps (23, 24) also serves as a safety device when mounting and removing the optional work bar, as the installation position of the quick clamps (23, 24) is installed on the hydraulic line or the end of the line When the connecting hoses (not shown) of the quick clamps 23 and 24 were broken during the operation, there was a risk of failing to act as a safety device when leakage occurred.

On the other hand, since the high pressure is transmitted to the quick clamps 23 and 24 in order to increase the tightening force with the optional work machine, this causes an excessive load on the connection hoses, nipples, and valves, which are the main components of the quick clamps 23 and 24. There is a problem such as being caught, resulting in a decrease in the life and performance of the quick clamp (23, 24).

Accordingly, the present invention has been made to solve the problems described above, regardless of the type of the optional work machine mounted on the excavator and the pin distance of the bracket for the installation of the optional work machine to easily install or remove the optional work machine option worker It is an object of the present invention to provide an optional working clamping device for an excavator that can improve workability due to the quick replacement of the excavator.

The present invention for achieving the above object, a sliding groove is formed in the main bracket of the quick clamp to which the optional work machine is fastened, the sliding plate is installed to allow the linear reciprocating movement of the sliding groove, the sliding plate The hook is detachably installed on the rotation pin inserted and fixed to the connecting portion of the hook, and a cylinder for operating the hook to rotate the hook is installed at the rear of the hook via a fixing pin, while the rear of the cylinder is connected through a connection hose. The safety valve is opened and closed by the flow of the inlet flows forward and backward structure.

In addition, a plurality of hook rotation angle control stoppers are formed on the upper portion of the hook, so that the relative position of the hook that rotates by the operation of the cylinder can be adjusted appropriately.

In addition, the cylinder is composed of the upper space and the lower space to control the flow rate flowing into the upper / lower space respectively by the opening and closing operation of the safety valve to move the cylinder forward or backward.

In other words, when the optional work machine is mounted on the arm tip of the excavator, when hydraulic pressure is applied through the connection hose connected to the cylinder, the safety valve installed at the rear of the cylinder is opened while the fluid flows into the lower space of the cylinder to advance the cylinder. Accordingly, the hook installed at the front of the cylinder is rotated by a predetermined angle, so that the sliding plate is advanced by the rotational movement of the hook, so that the hook is fastened to the rotating pin provided on the sliding plate.

On the other hand, when the option worker is removed, the fluid flows into the upper space of the cylinder and the cylinder is moved backward so that the front hook is removed from the rotation pin, and the hook rotation angle control stopper is returned to the original rotation angle. will be.

Accordingly, as described above, the quick clamp is fastened to or removed from the rotary pin by the rotation of the hook, so that the fastening position can be properly adjusted according to the type of the optional work tool, thereby replacing the optional work tool performed at the tip of the excavator arm. The work can be done quickly and easily.

1 is a schematic diagram schematically showing a clamping device for an optional work tool of an excavator according to the present invention.

Figure 2 (a) is a side view schematically showing a bucket mounted to the excavator.

Figure 2 (b) is a side view schematically showing a breaker mounted on an excavator.

Figure 3 (a) is a schematic diagram showing a clamping device for an optional work tool of an excavator according to the prior art.

FIG. 3 (b) is a schematic diagram schematically showing another embodiment of FIG. 3 (a).

* Explanation of symbols for main parts of the drawings

1: Quick clamp 2: Main bracket

3: sliding groove 4: sliding plate

5: rotating pin 6: hook

6a: stopper for hook rotation angle control 7: cylinder

7a: Upper cylinder space 7b: Lower cylinder space

8: fixing pin 9: connection hose

10: safety valve 11: connector

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

1 is a schematic diagram showing a clamping device for an optional work machine of an excavator according to the present invention, in which a quick clamp 1 is installed at the tip of an excavator arm (not shown) to safely mount or remove the optional work machine to the excavator. A sliding groove 3 is formed in the main bracket 2 of the quick clamp 1 so that the sliding plate 4 is installed in the sliding groove 3 so as to perform a linear reciprocating motion. The hook 6 is installed on the rotating pin 5 fixed to the connection portion of the hook 6, and the cylinder 7 for operating the hook 6 to rotate the rear of the hook 6 is fixed to the pin 8. While being connected via a medium), a safety valve 10 is installed at the rear of the cylinder 7 to be opened and closed by a flow rate flowing through the connection hose 9 so that the cylinder 7 can be moved forward and backward. to be.

In addition, a plurality of hook rotation angle control stoppers 6a are formed at an upper portion of the hook 6, and the hook 6 is appropriately restrained by the rotation angle of the hook 6 rotating by the operation of the cylinder 7. To adjust the relative position of the desired position, thereby to facilitate the removal of the rotary pin (5).

In addition, the cylinder (7) to rotate the hook (6) as described above consists of the upper space (7a) of the front and the lower space (7b) of the rear flow into the upper / lower spaces (7a, 7b), respectively. By controlling the flow rate to be controlled by the opening and closing operation of the safety valve 10, the cylinder 7 can be moved forward or backward.

Here, when the switch operation in the driver's seat to mount the optional work machine to the arm tip of the excavator, the solenoid valve (not shown) receiving the electric signal is operated to hydraulic pressure through the connecting hose (9) connected to the cylinder (7) The fluid is introduced into the lower space 7b of the cylinder 7 while the safety valve 10 behind the cylinder 7 is opened by this hydraulic pressure, so that the cylinder 7 is advanced and the hook ( 6) is rotated by a predetermined angle, the sliding plate 4 is advanced by the rotational movement of the hook (6) hook 6 to the rotary pin (5) provided on the sliding plate (4) Is to be fastened.

Meanwhile, as the cylinder 7 moves forward, the fluid in the upper space 7a of the cylinder 7 returns to the tank (not shown). At this time, the switch that sends an electric signal is turned off, and the optional work machine and the excavator The safety valve 10 for fastening with the arm is operated to secure the fastening of the optional work tool.

On the other hand, when removing the option worker to operate the solenoid valve again by operating another electrical switch, the connecting pipe 11 connecting the rear of the safety valve 10 and the upper space (7a) of the cylinder (7) Through the fluid flows into the upper space (7a) of the cylinder (7) to reverse the cylinder (7), thereby removing the hook (6) from the rotary pin (5) the hook rotation angle control stopper (6a) By returning to the original rotation angle.

In addition, the hydraulic pressure applied to the upper space 7a of the cylinder 7 pushes the check valve (not shown) inside the safety valve 10 through the connection pipe 11 behind the safety valve 10 to open the cylinder. The fluid contained in the lower space 7b of 7 is returned to the tank through the safety valve 10 again.

That is, by continuously applying the hydraulic pressure to the cylinder (7) by the circulation of the fluid as described above to advance the cylinder (7), by applying a force to the hook (6) connected to the rotational movement and the sliding plate of the hook (6) By proceeding the sliding action of (4) in order to be able to operate the relative position of the hook (6) to the desired position by the action of the hook rotation angle control stopper (6a).

Therefore, the operation of the quick clamp 1 is smoothed, so that the replacement of the optional work machine becomes easier, and the hydraulic pressure applied to the cylinder 7 of the quick clamp 1 can be used at a low pressure instead of a high pressure. To improve the life and performance of the quick clamp (1), and to install the safety valve 10 in the cylinder (7) to protect the safety valve (10) during work, and to simplify the piping to deliver the hydraulic pressure It was supposed to be.

As described above, according to the clamping device for the optional work machine of the excavator according to the present invention, the quick clamp can be fastened to or removed from the rotary pin by the rotation of the hook so that the fastening position can be properly adjusted according to the type of the optional work machine. By doing so, it is possible to quickly and easily replace the optional work performed at the tip of the excavator arm.

Claims (3)

A sliding groove 3 is formed in the main bracket 2 of the quick clamp 1 to which the optional working machine is fastened, and the sliding plate 4 is installed in the sliding groove 3 so as to perform a linear reciprocating motion. The hook 6 is detachably installed on the rotation pin 5 inserted and fixed to the connection portion of the sliding plate 4, and the cylinder 7 which operates the rotation of the hook 6 at the rear of the hook 6. Clamping device of the optional work machine for excavators, which is connected via a fixed pin (8). According to claim 1, A plurality of hook rotation angle control stopper (6a) is formed on the upper portion of the hook (6), restrains the rotation angle of the hook (6) that rotates by the operation of the cylinder (7) hook Clamping device of the optional work machine for excavators, characterized in that the relative position according to the rotation of (6) can be adjusted appropriately. The solenoid valve (12) of claim 1, wherein the cylinder (7) comprises an upper space (7a) and a lower space (7b), and the solenoid valve (12) for selectively introducing fluid into the upper and lower spaces (7a, 7b), respectively. Is provided, the passage connecting the solenoid valve 12 and the lower space 7 (b) of the cylinder 7 is provided with a safety valve 10 including a check valve (10a) to prevent the back flow of the hydraulic oil Clamping device of the optional work machine for excavators.