KR101498650B1 - Safety locking device of claws for excavators - Google Patents

Abstract

The present invention relates to a safety fixing equipment of claws for an excavator. And a latching hook is elastically moved and restored by a coil spring and a guide member and selectively rotated, a latching pin is selectively restricted and fixated by the operation of an inflow cylinder through the latching hook, and a boom is formed to be inclined by certain angles from the ground and rotated by a dead weight so that the latching hook is separated from the latching pin and released restriction. Therefore, operation efficiency can be improved since the claws can be automatically fixated in case of not being used and released in case of being used without a manual work of an operator for the excavator. And the claws can be automatically fixated in case of not being used and released in case of being used without a manual work of the operator therefor so that the safe for the operator can be improved.

Description

[0001] The present invention relates to a safety locking device for claws for excavators,

More particularly, the present invention relates to a safety fixture for a claw for a digger, and more particularly, to a safety fixture for a claw for a digger, and more particularly, The present invention also relates to a safeguard apparatus for an excavator for safely securing an operator by fixing and unlocking the nippers automatically without manual operation of the excavator operator.

Generally, the construction site, the waste collection point and the demolition site require a large amount of manpower and labor due to the load and volume of the work object, and thus the excavator is used to reduce the manpower and labor and increase the efficiency of the work.

Excavators applied to such construction sites, waste collection sites, and demolition sites are equipped with claws on the inside of buckets to transport or construct wood, stone, and waste concrete.

The excavator applied to the construction site, the waste collection and demolition site as described above is equipped with a bucket for boom and coupling, and a claw is provided on the inner portion of the bucket for pivotal operation about the hinge portion A hydraulic cylinder and a piston rod are mounted between the claw and the boom so that the claw is pivoted by driving the hydraulic cylinder.

FIG. 1 is an exemplary view showing the installation state of a conventional excavator claw.

Referring to FIG. 1, a conventional excavator claw is shown in more detail. A coupling 13 is coupled to the boom 11 of the excavator and the linkage 12, A bucket 10 is mounted and a claw 20 is rotatably mounted on the lower end of the boom 11 in the inner direction of the bucket 10 by a hinge 21, And a hydraulic cylinder 30 and a piston rod 31 are mounted between the bracket 32 and the claw 20. [

Such conventional excavator claws are installed in such a manner that the claws are pivoted by engaging with the buckets by being driven by a hydraulic cylinder from inside the bucket or are opened to grip the workpiece. Therefore, the workpiece such as wood, stone and waste concrete is gripped, And can perform the excavation work using the bucket according to the conditions in the work process.

However, the conventional claws for excavators require troublesome and delayed work because the claws must be dismantled in the excavator in case of using only buckets according to the conditions in the course of work or in case of malfunctions in the claws. In particular, When the work is performed, the work is difficult because the nippers interfere with the work and obstruct the view of the excavator driver.

Furthermore, it is very cumbersome and labor-consuming and time-consuming to dismantle or reattach the claws according to the circumstances at the worksite. In addition, when the claws are malfunctioning, the excavation work using the bucket can not be performed smoothly There was a problem to dismantle the claws.

Therefore, in order to solve the above problems, there has recently been developed and used a claw-fixing device for an excavator as shown in Patent Document 1 (Registered Utility Model No. 20-0451302, December 12, 2010, Korea Registered).

Hereinafter, a conventional "excavator grip fixing device" according to Patent Document 1 will be described. The indefinite notation "excavator" refers to "excavator", "bucket" refers to "bucket", " Quot ;, "bracket" and the like will be corrected and explained.

A conventional claw fixing device for an excavator according to Patent Document 1 includes a bucket installed in a boom and a coupling of an excavator, a claw provided to be rotatable by a hinge portion on the boom in an inner direction of the bucket, a bracket attached to the upper portion of the claw, A pin fixedly mounted on the boom of the excavator and rotatably supported by the bracket and the hinge and formed in a ring shape and selectively inserted into the holes formed in the support and the bracket to fix the rotation operation of the support; And a stopper protruding outwardly from the claw so as to be engaged with the support formed in the annular shape.

At this time, the support has a tip portion formed in a ring shape, and a side end opposite to the support portion is installed to be rotatable by a hinge portion on the bracket, and a fastening hole is formed in the bracket and the support, .

According to the conventional claw fastener for excavator described above with reference to the above-mentioned Patent Document 1, only the bucket is used depending on the working conditions or the claw is selectively fixed to the boom of the excavator so that the bucket can be operated In addition, since it is not necessary to disassemble or reattach the nippers at the work site, the work can be performed quickly and easily.

In other words, in the conventional claw fixing device for an excavator as described above, when the claw is fixed, the claw is lifted to the boom side by using a hydraulic cylinder, then the support is manually hooked to the catch and then the support is separated from the catch The pin is inserted and fixed through the fastening hole of the bracket so as to selectively fix the claw.

However, in the conventional claw fixing device for a digger according to the related art, since the operation of hooking the support to the hook is manually performed, the operator who operates the excavator must perform a work of supporting the support, Not only the manually operated pin of the excavator operator but also the manual pin of the pin must be pulled out manually and then reinserted.

Therefore, when the nippers are not used, the nippers can be fixed and unlocked automatically without fixing the nippers at the time of using the nippers and the manual operation of the excavator operators, so that the efficiency of the nippers can be remarkably improved. There is a need for research and development of a safety fastening device for an excavator claw that can secure the safety of an operator by fixing and unlocking the nippers automatically without the need of the operator.

Registration of Korea Utility Model No. 20-0451302 Dec. 2, 2010 Registration

In order to solve the above problems, the present invention provides a safety fixture for a digger for a crawler excavator, which is capable of automatically fixing the claw of the excavator operator without manual operation of the excavator operator, And to provide the above-mentioned objects.

In addition, the technique according to the present invention is intended to fix the claws when the claws are not used, and to automatically fix the claws when the claws are used, without manual operation of the excavator operator, thereby significantly improving work efficiency .

It is another object of the present invention to provide a safety device for a worker by fixing and fixing the claws automatically without manual operation of an excavator operator.

The present invention for achieving the above-mentioned objects is as follows. That is, the safety fixing device for a claw for a digger according to the present invention comprises a bucket installed by a quick coupler connected to an end of a boom, and a bucket which is installed so as to be rotatable by a connecting shaft on one side of the boom end and the quick coupler, And a hydraulic cylinder in which both ends are rotatably installed between the claw and the mounting bracket attached to one side of the upper portion of the boom, wherein the claw is selectively moved to one side of the boom by the operation of the hydraulic cylinder Wherein the boom is fixed to a side of the boom at a predetermined distance apart from the lower side of the boom so as to selectively restrain a locking pin protruding outward from the side of the catch, Is fixed to one side of the mounting bracket fixedly attached to one side of the mounting bracket A fixing bracket provided in a pair spaced apart from each other by a predetermined distance in the width direction of the boom, and having a long guide hole formed at one side thereof; A pair of fixing brackets provided on both sides of the fixing bracket, a pair of fixing brackets interposed between the pair of fixing brackets for slidingly moving back and forth along the guide holes by a guide member, A hook ring configured to engage the hook; A stopper piece which is tightly fixed to an upper portion of one side of the guide hole of the pair of fixing brackets opened to prevent the retaining ring from rotating in a clockwise direction; And one end is fixed to one side of the guide member and the other end is fixed to an outer surface of a lower portion of one of the pair of fixing brackets, the hooking ring is selectively elastic, and is guided by the guide member along the guide hole And a coil spring for slidably moving and returning the coil spring.

Here, the guide member is connected to the movable rotation bar of the engagement ring in a shaft structure so as to be rotatable in one direction between the pair of the fixing brackets, wherein a guide shaft provided as a male and female screw type and a guide shaft provided at both ends of the guide shaft And guide pieces which are formed in a disk type having a larger area than the guide shaft and which move and return along the guide hole while maintaining the constraint state of the guide shaft with respect to the guide hole.

The coil spring has one end fixedly attached to one side of the guide member by a first fixing member, and the other end fixed to the outer surface of a lower portion of one of the pair of fixing brackets by a second fixing member. Do.

The first fixing member may include a first fixing bolt that is fastened and fixed to an outer surface of one of the guide members of the guide member and a second fixing bolt that is interposed between the head of the first fixing bolt and the guide piece, Wherein the second fixing member comprises a second fixing bolt fastened and fixed to an outer surface of a lower portion of one of the pair of fixing brackets, And a second fixing nut interposed between the head portion of the fixing bolt and the lower outer surface of the fixing buckle so as to fix the other end of the coil spring without flowing.

Further, the retaining ring may be formed such that an insertion hole is formed at the center of the movement rotating bar, the guide shaft is inserted into the insertion hole, and the guide ring is rotatable only in one direction between the pair of fixing brackets by the guide member When the angle of the boom is rotated upwards from the ground, it is preferable that the arc-shaped ring is rotated by its own weight so that the arc-shaped ring is disengaged from the latch pin and the latch pin is released.

The effect of the safety fixing device for a claw for a digger according to the present invention is as follows.

First, the latching pin is fixedly secured through the latching ring selectively by the operation of the inflow cylinder, the boom is inclined at a predetermined angle from the ground, and the latching pin is rotated by its own weight so that the latching ring is separated from the latching pin, Through this, it is possible to fix the nippers when the nippers are not used, and to automatically cancel the fixing of the nippers when the nippers are used, without manually operating the excavator operators.

Secondly, since the hook and the hook are elastically moved and returned by the coil spring and the guide member and are selectively rotated, the claw is fixed when the claw is not used, and the claw of the claw is fixed manually when the claw is used. It is possible to remarkably improve the work efficiency.

Third, the claws are fixed and unlocked automatically without manual operation of the excavator operator, so that the safety of the operator can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view showing a state in which a conventional excavator claw is installed. FIG.
2 and 3 are views showing a state in which the nippers are fixed by the safety fixing device of the nippers for excavators according to the present invention and a state in which the nippers are not fixed.
4 is a perspective view showing a safety fixing device for a claw for a digger according to the present invention.
5 is a cross-sectional view showing a safety fixing device for a claw for a digger according to the present invention.
6A and 6B are views showing a fixed state and a fixed state of the locking pin by the safety fixing device for a claw for a digger according to the present invention.
7A to 7D are diagrams showing steps of fixing the latch pin to the safety fixing device of the claw for a digger according to the present invention.
8 is an exemplary view showing a state in which the retaining pin is fixed from the safety fixing device of the claw for a digger for excavators according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a preferred embodiment of a safety fixture for a claw for a digger according to the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 are views illustrating a state in which the nippers are fixed by the safety fixing device for the excavator claw according to the present invention and a state in which the claw is not fixed, FIG. 5 is a cross-sectional view showing a safety fixing device for a claw for an excavator according to the present invention. FIG.

FIGS. 6A and 6B are views illustrating a fixed state and a fixed state of the locking pin by the safety fixing device for a claw for a digger according to the present invention, and FIGS. 7A to 7D are views showing a safety fixing device for a claw for a digger according to the present invention, FIG. 8 is an exemplary view showing a state in which the retaining pin is fixed from the safety fixing device for a claw for a digger according to the present invention. FIG.

As shown in FIGS. 2 to 8, the safety fixture 700 for a claw for a digger according to a preferred embodiment of the present invention includes a bucket 300 installed by a quick coupler 200 connected to an end of a boom 100, A claw 400 mounted to an end of the boom 100 and the quick coupler 200 so as to be rotatable by a connecting shaft 350 so as to face the bucket 300; (500) installed on one side of an upper portion of the hydraulic cylinder (100), the hydraulic cylinder (600) having both ends thereof rotatably installed, the claw (400) The boom 100 may be fixed to one side of the boom 100 by a predetermined distance apart from the lower side of the mounting bracket 500 and fixed to the side of the catch 400, (410).

The security fixture 700 for the excavator claw includes a fixing bracket 710, 710 ', a retaining ring 720, a stopper piece 740, and a coil spring 750.

Specifically, the fixing brackets 710 and 710 'are fixed on one side of the lower side of the mounting bracket 500, which is fixed to one side of the boom 100, And are spaced apart by a certain distance.

As described above, the pair of fixing brackets 710 and 710 'each have a guide hole 711 and 711' formed at one side thereof.

The retaining ring 720 is interposed between the pair of retaining brackets 710 and 710 'and is guided by the guide member 730 and the coil spring 750, which will be described later, in the guide holes 711 and 711' And is configured to have an arc-shaped ring 725 at a lower portion of the movable rotary bar 721 so as to selectively restrain the locking pin 410 of the claw 400 .

The guide member 730 includes a guide shaft 731 and a guide piece 735. The guide shaft 731 rotates the movable rotation bar 721 of the retaining ring 720 to the pair of And is fixed to the fixing brackets 710 and 710 'in a shaft structure so as to be rotatable in one direction.

The guide pieces 735 are formed on the both ends of the guide shaft 731 to have a larger area than the guide shaft 731 so that the guide shafts 731 are formed on the guide holes 731 with respect to the guide holes 711 and 711 ' And moves and returns along the guide holes 711 and 711 'while maintaining the constrained state.

The stopper piece 740 is tightly fixed to an upper portion of one side of the guide holes 711 and 711 'of the opened pair of the fixing brackets 710 and 710' so that the retaining ring 720 is rotated clockwise .

In other words, the stopper piece 740 is a member that prevents one side of the upper end of the movement rotation bar 721 of the retaining ring 720 from rotating in the clockwise direction.

One end of the coil spring 750 is fixed to the outer side of the guide member 730 and the other end is fixed to the outer surface of the lower portion of the fixing bracket 710 of the pair of fixing brackets 710 and 710 ' The hooking ring 720 is selectively resilient and is slidably moved back and forth along the guide holes 711 and 711 'by the guide member 730.

One end of the coil spring 750 is fixed to the outer side of the guide member 730 by a first fixing member 760 and the other end of the coil spring 750 is fixed to one side of the pair of fixing brackets 710 and 710 ' It is preferable that the second fixing member 770 is fixed to the lower outer surface of one fixing bracket 710.

The first fixing member 760 includes a first fixing bolt 761 fastened and fixed to an outer surface of one of the guide pieces 735 of the guide member 730, And a first fixing nut 762 interposed between the head portion of the coil spring 750 and the guide piece 735 to fix one end of the coil spring 750 so as to prevent the flow.

The second fixing member 770 includes a second fixing bolt 771 fastened and fixed to a lower outer surface of a fixing bracket 710 of the pair of fixing brackets 710 and 710 ' And a second fixing nut 770 interposed between the head of the bolt 771 and the lower outer surface of the fixing bushing 710 to fix the other end of the coil spring 750 without any flow.

In addition, in the security fixture 700 for a claw for a digger for excavators according to the present invention, the retaining ring 720 is formed with an insertion hole 722 at the center of the movement rotation bar 721, The guide shaft 731 is inserted on the insertion hole 722 and is rotatable only in one direction between the pair of fixing brackets 710 and 710 'by the guide member 730, When the angle of the boom 100 is rotated upwards from the ground, it is preferable that the arc-shaped ring 725 is disengaged from the engagement pin 410 by rotation due to its own weight so that the restraint of the engagement pin 410 is canceled .

According to the security fixing device 700 for a claw for a digger according to the present invention as described above, the retaining pin 410 is fixedly secured through the retaining ring 720 selectively by the operation of the inlet cylinder 600, The boom 100 is rotated at its own weight by inclining the boom 100 at a predetermined angle from the ground so that the arcuate ring 725 of the retaining ring 720 is disengaged from the retaining pin 410 so that the retaining of the retaining pin 410 can be canceled.

Therefore, the claw 400 can be fixed when the claw 400 is not used, and the claw 400 can be automatically released without manual operation of the claw operator when the claw 400 is used.

In addition, since the retaining ring 720 is elastically moved and returned by the coil spring 750 and the guide member 730 and is selectively rotated, when the nail clip 400 is not used, And the claw 400 can be automatically released without manual operation of the excavator operator during the use of the claw 400, thereby significantly improving work efficiency.

In addition, since the claw 400 is automatically fixed without being manually operated by the excavator operator, it is possible to secure the safety of the operator.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, the invention is not limited thereto. Various modifications may be made by those skilled in the art. Are included in the scope of the present invention.

100: Boom 200: Quick coupler
300: Bucket 350: Connection axis
400: nib 410: catch pin
500: mounting bracket 600: inflow cylinder
700: Fixing device
710, 710 ': Fixing bracket 711, 711': Guide ball
720: Retaining ring 721: Moving rotary bar
722: insertion hole 725: arched ring
730: guide member 731: guide shaft
735: guide piece 740: stopper piece
750: coil spring 760: first fixing member
761: first fixing bolt 762: first fixing nut
770: second fixing member 771: second fixing bolt
772: second fixing nut

Claims (5)

A bucket 300 installed by a quick coupler 200 connected to an end of the boom 100 and a connecting shaft 350 connected to an end of the boom 100 and the quick coupler 200 facing the bucket 300, The hydraulic cylinder 600 is installed between the claw 400 and the mounting bracket 500 attached to one side of the boom 100 so that both ends of the hydraulic cylinder 600 are rotatable. The mounting bracket 500 is installed on one side of the boom 100 so that the claw 400 can be selectively fixed to one side of the boom 100 by the operation of the hydraulic cylinder 600. [ (700) fixedly installed at a predetermined distance away from the lower side to selectively restrain a locking pin (410) protruding outward from the side of the claw (400), characterized in that:
A mounting bracket 500 fixed to one side of the boom 100 is fixed to one side of the lower side of the mounting bracket 500 and is spaced apart from the boom 100 by a predetermined distance, A fixing bracket 710, 710 'through which guide holes 711, 711' are formed in a long length;
Is resiliently moved and returned along the guide holes 711 and 711 'by the guide member 730 interposed between the pair of fixing brackets 710 and 710' A hooking ring 720 configured to have an arcuate ring 725 at a lower portion of the movable swivel bar 721 so as to selectively restrict the swivel pin 410;
A stopper piece 740 which is tightly fixed to an upper portion of one side of the guide holes 711 and 711 'of the opened pair of the fixing brackets 710 and 710' to prevent the rotation of the retaining ring 720 in the clockwise direction; And
One end of which is fixed to the outer side of the guide member 730 and the other end is fixed to the lower outer surface of one of the fixing brackets 710 of the pair of fixing brackets 710 and 710 ' And a coil spring (750) for resiliently sliding along the guide holes (711, 711 ') by the guide member (730).
The method according to claim 1,
The guide member 730 is connected in a shaft structure so that the movable rotary bar 721 of the retaining ring 720 can rotate in one direction between the pair of fixing brackets 710 and 710 ' The guide shaft 731 and the guide shaft 731,
The guide shafts 731 are formed on both ends of the guide shafts 731 to have a larger area than the guide shafts 731 so as to maintain the guide shafts 731 in a constrained state with respect to the guide holes 711 and 711 ' And a guide piece (735) for moving and returning the guide piece (711, 711 ') along the guide piece (711, 711').
3. The method of claim 2,
One end of the coil spring 750 is fixed to the outer side of the guide member 730 by a first fixing member 760 and the other end of the coil spring 750 is fixed to one of the pair of fixing brackets 710 and 710 ' And the second fixing member (770) is fixedly installed on the lower outer surface of the bottom portion (710) of the elevator.
The method of claim 3,
The first fixing member 760 includes a first fixing bolt 761 fastened to an outer surface of one of the guide pieces 735 of the guide member 730, And a first fixing nut 762 interposed between the head part and the guide piece 735 to fix one end of the coil spring 750 so as not to flow,
The second fixing member 770 includes a second fixing bolt 771 fastened and fixed to a lower outer surface of a fixing bracket 710 of the pair of fixing brackets 710 and 710 ' And a second fixing nut (770) interposed between the head of the fixing bracket (771) and the lower outer surface of the fixing bracket (710) to fix the other end of the coil spring (750) Of the safety fixture.
3. The method of claim 2,
The hook 720 is formed with an insertion hole 722 at the center of the movement bar 721. The guide shaft 731 is inserted into the insertion hole 722 to guide the guide member 730, When the angle of the boom 100 is rotated upwards from the ground, it is rotated by its own weight so that the arc-shaped hooks 710 and 710 ' (725) is released from the retaining pin (410) and the restraint of the retaining pin (410) is canceled.

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