KR101728831B1 - Safety claw fixture for excavators - Google Patents

Safety claw fixture for excavators Download PDF

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Publication number
KR101728831B1
KR101728831B1 KR1020160013040A KR20160013040A KR101728831B1 KR 101728831 B1 KR101728831 B1 KR 101728831B1 KR 1020160013040 A KR1020160013040 A KR 1020160013040A KR 20160013040 A KR20160013040 A KR 20160013040A KR 101728831 B1 KR101728831 B1 KR 101728831B1
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KR
South Korea
Prior art keywords
elastic
arm
claw
protrusion
bucket
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Application number
KR1020160013040A
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Korean (ko)
Inventor
정진호
Original Assignee
주식회사 경원테크
정진호
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Priority to KR1020160013040A priority Critical patent/KR101728831B1/en
Application granted granted Critical
Publication of KR101728831B1 publication Critical patent/KR101728831B1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/24—Safety devices, e.g. for preventing overload
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
    • E02F3/4135—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device with grabs mounted directly on a boom
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)

Abstract

The present invention relates to a safety claw fixture for an excavator and, more specifically, relates to a safety claw fixture for an excavator, which can easily lock and release a claw, and prevent the claw from being naturally left from an arm side. The safety claw fixture (100) for an excavator comprises an arm side fixing unit (200), a clip hook unit (300), a locking unit (400), and a clip side detachable unit (500).

Description

[0001] The present invention relates to a safety claw fixture for excavators,

The present invention relates to a safety fastening device for a claw for an excavator, and more particularly, it relates to a safety fastening device for a claw for a digger, and more particularly, It is possible to easily carry out the locking and unlocking. Further, after the claw is fixed to the female side, the excavator is mounted on the transportation vehicle and transported, or when the claw is used, the noise generated in the hook locking device in which the claw is fixed is blocked, And more particularly, to a safeguard apparatus for an excavator which can prevent the nipper from being separated from the female side due to the loss of hydraulic pressure in the hydraulic system of the hydraulic cylinder that supports the nipple when not in use.

Typically, an excavator is a kind of special vehicle that is mounted on a caterpillar on a caterpillar, mounted on a cap, a power unit, etc., so that the caterpillars of a specific place can be pumped up and transported by other transportation means such as a dump truck. And the vehicles used for construction and civil engineering work that perform excavation work by moving the bucket arms and clamps by the power.

The excavator has a quick coupler connected to the boom and capable of attaching and detaching the bucket, and the bucket is connected to the hydraulic device.

Here, the bucket detachably attached to the quick coupler is configured to perform various operations according to the type and the type of the bucket. For example, a work having a polyp bucket may be used to load or unload a rock and a wood It is also possible to perform the excavation work of earth and sand by the working device adopting the chromal bucket, the waste treatment and the house dismantling work by the working device having stranger bucket, and the working device with the loader bucket Slope excavation and soil excavation work, respectively.

The quick coupler provided at the end of the arm of the excavator has a bucket and a clamp so that the bucket and the clamp can be assembled at the same time so that the bucket can be used. There is also a bucket-type gripper of an excavator which can easily lift heavy objects such as stones, stones, or woods and work efficiently.

As will be further discussed with respect to the prior art in which the excavator is equipped with buckets and forceps, the characteristic component, as disclosed in Patent Registration No. 10-1394863, is that the end of the cylinder rod, which is coupled to the underside of the excavator, And the upper end of the link is coupled to the upper end of the link-engaging body, and the upper end of the link-engaging body is coupled to the extension of the buckle by a link shaft, And the lower end of the yoke is provided with a central link coupled with the extension of the bucket and the forward link is engaged with the extension of the clamp and the cylinder rod of the hydraulic cylinder, And a hydraulic cylinder.

When the cylinder rod of the hydraulic cylinder is projected forward and downward, the center link ascending to the upper side is lowered and the front link and the yoke are contracted to form a widening angle. By the angle at which the link is opened, the tongs are opened to the right and the bucket is moved to the left by the descent of the link at the center, so that the bucket and the tongs are opened.

As described above, the work to be performed is performed by alternating the state in which the bucket and the clamp are engaged and the state in which the bucket and the clamp are engaged.

However, in the above, when the workpiece is gripped by the gripper and the bucket, and the work is performed by the bucket, the gripper is unnecessary.

Therefore, at this time, it is troublesome to disconnect both the buckets and the clamps coupled to the link coupling body from the arm, and then connect the quick coupler to the end of the arm and then connect the necessary buckets.

Therefore, even when performing the operation of the bucket, the prior art for making continuity of work without separating the tongs from the arm is disclosed in Utility Model Registration Registration No. 20-0451302.

Here, technical features will be described by changing the indefinite notation "excavator" to "excavator", "boom" to "cancer" and "bucket" to "bucket".

That is, the bucket includes a bucket installed in an arm and a coupling of an excavator, a claw provided to be rotatable by a hinge on the arm in an inner direction of the bucket, and a hydraulic cylinder installed between the claw and the bracket attached to the upper portion of the arm, A support which is rotatably supported by a bracket and a hinge portion and which is formed in a ring shape; a pin which is inserted in a fastening hole formed in the support and the bracket to fix a rotation operation of the support; And a latching protrusion protruding from the latching protrusion.

The effect of the above-described construction is that the work of grasping trees, stones, and waste concrete is carried out by a claw, which is opposed to a bucket mounted on an excavator, and also when a bucket is used for excavation work, a claw is pulled by a hydraulic cylinder, The excavation work is performed by fixing the nippers to the support, and the excavation work of the bucket is carried out without dismantling the nippers from the boom in the excavator.

As described above, the claw fixing device for an excavator uses a hydraulic cylinder to lift the claws to the arm side, then manually rotates the support upward, and when the claw is reached at the claw position, the support is pivoted downward, And the pin is inserted and fixed through the fastening hole of the bracket in order to prevent the support from being detached from the fastening opening.

However, the claw fixing device for the excavator is manually operated by a worker who operates the excavator, and a series of operations for inserting a pin for preventing the support from being pulled out from the hook, There is a problem that the operation efficiency is lowered and troublesome because the pins must be manually pulled out and then reinserted.

Therefore, when the nippers are not used, when the nippers are fixed and the nippers are used, a series of manual operations for releasing the nippers are automatically resolved to improve the work efficiency, and the nippers are automatically fixed and disengaged automatically, It is required to research and develop a fixing device for an excavator claw which can secure safety of the excavator.

Therefore, as disclosed in Japanese Patent Application No. 2015-106744 filed by the present applicant in order to meet the above-mentioned problems, the present invention is characterized in that the fixing member 10 fixed to one side of the arm A, And an engaging rod 30 which is inserted through the through hole 21 of the engaging member 20 and the engaging member 20 at an end of the engaging rod 30, And a retaining piece 40 having a through hole 41 for restricting the retaining piece 40. The retaining piece 40 is provided with a weight portion 22 for guiding the eccentricity in one direction with the center of gravity in one direction, The stopper ring 23 for selectively engaging and restraining the stopper piece 51 and the inner surface of the stationary piece 10 are alternately tightened and spaced apart from each other by a predetermined gap to limit the radius of rotation of the earth 20 And a stopper portion 24 which is provided with a stopper.

When the bucket is used only for excavation, the claw must be fixed to the hanging earth attached to the arm.

However, in order to hang on to the earth, the following prerequisite is needed.

3, the weight portion 22 having the center of gravity in the engaged region 20 is rotated about the connecting rod 30 in the direction of the arm A, while the stopper portion 24 is rotated in the direction of the arm A, The arm A must be in a vertical state so as to be braked by the brakes.

When the hydraulic cylinder 60 connected to the claw 50 is operated in a state where the claw is hooked and ready to hang on the earth, the claw 50 rotates about the connecting shaft 70 of the quick coupler, So that the circular engagement pin 51 provided in the inside of the claw 50 is in a state of being spaced apart from the lower side of the hooking collar 23.

Then, the engaging pin (51) is locked by the weight (22) having the center of gravity and the loop (23) is hooked while the globe (20) rotates forward.

As described above, the process of binding the nippers 50 to the earth 20 is performed automatically and quickly, thereby shortening the time required for excavating the bucket.

However, when the bucket of the excavator and the claw 50 are used at the same time, the caulking region 20 which fixes the claw 50 is caused to collide with the arm 1 frequently by the weight portion 22 having the center of gravity, Of course, there is a problem that the clinging region 20 is damaged by the long-term collision with the arm 1 and must be replaced.

Further, if the excavator is mounted on a transportation vehicle after fixing the claw 50 on the side of the vehicle, or if the claw is fixed to the side of the vehicle due to unused for a long period of time and the hydraulic pressure is lost in the hydraulic system of the hydraulic cylinder supporting the claw, And when the nippers are released from the earth, the nippers rotate and drop around the quick coupler shaft, and the teeth at the end of the nippers collide with the bucket or collide with the ground There are problems such as causing damage to personnel from around the excavator to the worker who supports the work.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an elevator for an excavator that can automatically lock and open a gripper on a driver's seat, To be easily locked and unlocked.

It is a further object of the present invention to provide an excavator which is mounted on a transportation vehicle after the nippers are fixed to the side of a vehicle, and the noise generated from the hook locking device in which the nippers are fixed when the nippers are used is blocked, When the work is done, the hydraulic system of the hydraulic cylinder of the hydraulic cylinder that supports the nippers is lost, so that the nippers are prevented from being released from the side of the hammer, thereby preventing some damage of the nippers and preventing the damage to workers In the present invention.

In order to achieve the above object, according to the present invention, there is provided a bucket, comprising: a bucket (3) mounted through a quick coupler (2) connected to an end of an arm (1) A claw 5 installed to be rotatable through a connecting shaft 4 at an end of the arm 1 and a mounting bracket 6 attached to the upper part of one side of the arm 1, The hydraulic excavator according to the present invention is characterized in that in the excavator including the hydraulic cylinder 7 installed so as to be rotatable, the claw 5 is selectively fixed to one side of the arm 1 by the operation of the hydraulic cylinder 7, (1) to be separated from one side of the arm (1) by selectively rotating the arm (1) to the boom side when the use of the claws (5) In the safety fixture (100) of a nippers,

The safety lock device 100 of the excavator claw has a rotary operation groove 211 spaced from both sides of the upper side of a female side base A coupled to the arm 1 side and has first and second stopper holes And an elastic part 220 formed with an elastic receiving groove 221 on the lower side of the female side base A, (300) which is rotatably accommodated in the rotary operation groove (212) and has a weight portion (310) having a center of gravity at the center of the weight and a hook portion (320) A lock plate 402 having a knob 405 formed at an upper portion thereof and a braking protrusion 403 formed at a lower portion thereof is attached to a front portion of the weight portion 310 with a lock portion An elastic sweeping plate 222 fixed to an upper portion of the elastic receiving groove 221 while receiving an elastic force of the elastic member 223; A detachable protrusion 501 which is provided on the claw 5 and is detachable corresponding to the inner surface of the hook 320 and a clamp side base B which is in close contact with the elastic portion 220, (500).

The upper surface of the latching jaw 216 of the frame part 210 and the inner surface of the elastic shoe plate 222 received in the latching jaw are spaced apart from each other so as to receive an elastic force.

A play adjusting bolt 224 is formed in the elastic receiving groove 221 of the elastic part 220 and the elastic member 223 and the elastic swash plate 222 are sequentially A guide groove 227 is formed on the lower side of the elastic swash plate 222 corresponding to the guide protrusion 226 extending from the lower side of the elastic receiving groove 221 to be.

The inside of the hook portion 320 and the detachment protrusion 501 are either a right angle or a semicircle.

A setting hole 312 is formed in the upper part of the front surface of the weight part 310 and a locking hole 406 and an opening 407 are formed in the upper part of the locking plate 402 at a position corresponding to the setting protrusion.

A nut receiving groove 502 provided corresponding to a nut 225 provided in the elastic receiving groove 221 and a guide protrusion 226 provided in the elastic portion 220 are formed at the center of the gripping base B, And further includes guide holes 503 provided therein.

It is preferable that the first stopper hole 213 is provided on a horizontal plane of the frame 211 and the second stopper hole 214 is provided on an edge intersecting with a horizontal plane and a vertical plane of the frame 211.

The elastic member 223 is preferably made of a compression coil spring having a high elastic modulus.

The elastic member 223 may be either a conical plate spring having a high elastic modulus or an elastic rubber plate.

As described above, according to the present invention, when the nippers are not used or when the nippers are in use, the adjuster of the excavator can automatically lock and open the nippers at the driver's side in the driver's seat, so that the nippers can be easily locked and unlocked. When the excavator is mounted on a conveying vehicle after the claw is fixed to the side of the car, or when the claw is not used and only the bucket of the excavator is used, the hydraulic pressure is lost in the hydraulic system of the hydraulic cylinder supporting the claw, Thereby preventing the damage of a part of the claws, and also preventing the damage of the workers who have an auxiliary role in the vicinity of the excavator.

FIG. 1 is an exploded perspective view of a fixing piece and a fastening earth, which is a conventional fastener for a claw for an excavator; FIG.
Fig. 2 is an exemplary view showing a state in which a conventional excavator claw is separated from a fixing device; Fig.
3 is an exemplary view of a conventional excavator claw locked by a securing device;
FIG. 4 is an exploded perspective view of a female side fastener applied to the present invention and a perspective view of a catch side detachable portion. FIG.
FIG. 5 is a perspective view showing a state in which the female side fixing portion and the clamp side detachment portion, which are applied to the present invention, are separated on both sides.
FIG. 6 is a side view of a state in which the claw is released from the female side in a state where the arm is connected to the female side securement unit and the clip side detachable unit is coupled to the clip.
7 is an enlarged perspective view of a portion of 6;
Fig. 8 is a state before the hook binds the detachment protrusion in a state in which the nippers are attached by the arm. Fig.
9 is an enlarged perspective view of a portion b of 8;
Fig. 10 is an operating state in which the hook of the female fixing portion applied to the present invention binds the detachment protrusion of the clamp releasing portion.
FIG. 11 is an operational perspective view of the state in which the lock plate applied to the present invention is inserted into the second stopper hole in FIG. 10 to strengthen the binding between the hook and the detachment projection.
Figure 12 is a combined entire perspective view of Figure 11;

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

A bucket 3 which is mounted through a quick coupler 2 connected to an end of the arm 1 and a connecting shaft 2 which is opposed to the bucket 3 and which is connected to the quick coupler 2, And a mounting bracket 6 attached to an upper portion of one side of the arm 1 so as to be rotatable at both ends of the hydraulic cylinder 7, the claws 5 are selectively fixed to one side of the arm 1 by the operation of the hydraulic cylinder 7 so that only the bucket 3 is used and then the claws 5 (100) of the excavator can be selectively detached from the one side of the arm (1) by rotating the arm (1) to the boom side when the use of the arm (1) is required, .

The security fixture 100 of the excavator clamp includes a female stabilizer 200, a clamp hook 300, a lock portion 400 and a clamp detachable portion 500.

The female fixing portion 200 includes a frame portion 210 separated from the upper side of a female side base A coupled to the arm 1 side and having rotary operation grooves 211, And an elastic portion 220 having an elastic receiving groove 221 on the lower side thereof.

The body of the clamp hook portion 300 is housed in the frame portion 210 at the inside of the frame 212 partitioned by both sides and is coupled with the center shaft 213 so that the clamp hook portion 300 can be rotated It is desirable to be laid-air.

 First and second stopper holes 214 and 215 for braking the braking protrusion 403 of the lock plate 402 provided on the lock portion 400 are formed on the frame 212 .

The first stopper hole 214 is located on the horizontal plane of the frame 212 and the second stopper hole 215 is located on the corner where the horizontal plane and the vertical plane of the frame 212 meet.

A lower portion of the frame 212 is formed with an engaging protrusion 216 spaced apart from the elastic engaging plate 222 of the elastic portion 220 by a predetermined gap.

The elastic accommodating groove 221 of the elastic part 220 is provided with an adjusting bolt 224 for accommodating the elastic member 223. The elastic adjusting member 224 is provided with the adjusting bolt 224, And a nut 225 which is inserted through the elastic swinging plate 222 to prevent the elastic swinging plate 222 from being separated from the elastic swinging plate 222. In correspondence with the guide protrusion 226 extending from the lower side of the elastic receiving groove 221, 222 are provided with guide grooves 227 on the lower side thereof.

Here, the elastic member 223 can be selected from a compression coil spring, a conical spring or an elastic rubber plate having a high elastic modulus.

The clamping hook portion 300 is divided into a weight portion 310 having a center of gravity at the center and a hook portion 320 at a bottom portion of the clamping hook portion 300. The clamping rod 311 is provided at the center of the front face of the weight portion 310, And a setting protrusion 312 on the upper side, and the inside of the hook portion 320 may be formed in one of a right angle or a semicircle.

The locking part 400 is provided with a locking plate 402 and a connecting rod 311 of the weight part 310 is inserted into a hole 404 formed at the center of the locking part 402 to fix the locking plate 402 (Not shown). Here, the engaging member 401 is fastened so that the lock plate 402 can rotate in a predetermined direction.

A handle 405 protruding from the upper surface of the lock plate 402 rotatable about the connecting rod 311 at a predetermined angle is provided on the lower side of the handle 405, A lock hole 406 and an open hole 407 are alternately formed in the setting protrusion 312 provided on the frame 310 and the lock hole 402 is formed in the lower portion of the lock plate 402, And braking protrusions 403 which are braked by the first and second stuffer holes 214 and 215.

And a detachable protrusion 501 that is detachably attached to the inside of the hook portion 320 at an upper side of the clamp side base B provided on the clamp side detachable portion 500 and is provided at the center with the elastic portion 220 And a guide hole 503 corresponding to the guide protrusion 226 protruding from the elastic part 220 is formed on the lower side of the nut receiving groove 502.

Before describing the operation of the safety fastening device for the excavator claw for excavators according to the present invention as described above, fixing the claws to the arm for excavation work with the excavator buckets will be described as follows.

6 to 7, the excavator adjuster turns the weight portion 310 to the side of the arm 11 and then pushes the handle 405 of the lock plate 402 on the front surface of the weight portion 310, The locking plate 402 is rotated to fit the braking protrusion 403 to the first stopper hole 214. [

The handle 405 of the lock plate 402 is artificially pulled in a state in which the open hole 407 of the lock plate 402 is fitted in the setting protrusion 312 on the upper side of the weight portion 310, The braking protrusion 403 of the lock plate 402 is moved to the first stopper hole 214 by rotating the lock plate 402 about the fastening rod 311. Then, As shown in FIG. At this time, the setting protrusion 312 and the lock hole 406 of the lock plate 402 coincide with each other. Therefore, the lock hole 406 is fitted to the setting protrusion 312 by pushing the handle 405 backward so that the lock plate 402 can no longer be pivoted.

As described above, when the braking protrusion 403 is fitted into the first stopper hole 214 and the lock hole 406 is inserted into the setting protrusion 312, the weight portion 310 is maintained in the present state.

8-9, when the excavator coordinator actuates the hydraulic cylinder 7 associated with the cylinder rod of the gib footflow 5, the claw 5 is moved along the axis 4 of the quick coupler 2, And the clamping side detachable part 500 provided on the inner side of the claw 5 is brought into tight contact with the elastic part 220 on the front side of the female fixing part 200. [

At this time, the guide hole 503 provided on the clamping side detachable part 500 is guided by the guide protrusion 226 provided on the elastic part 220, and the nut receiving groove 502 at the center is inserted into the elastic part 220, As shown in FIG. At this time, the attaching protrusion 501 is in contact with the edge face of the frame 212 without coming into contact with the bottom face of the hook portion 320.

The tongue detachable part 500 presses the elastic shoe plate 222 of the elastic part 220 by pressing the hydraulic cylinder 7 and presses the elastic member 223 connected to the elastic shoe plate 222 The engaging jaw 216 of the frame 212 and the elastic resilient plate 222 spaced apart from each other come into close contact with each other.

The excavator adjuster moves the braking protrusion 403 fitted in the first stopper hole 214 in a state in which the clamping side detachable part 500 is in close contact with the female fixing part 200, When the knob 405 is pulled forward, the lock hole 406 fitted to the setting protrusion 312 is released. In this state, the knob 405 is rotated in the clockwise direction so that the protrusion 403 is engaged with the first stopper hole 241, The braking protrusions 403 on one side of the braking protrusions 403 on both sides separated are placed between the frames 212 spaced on both sides so that the braking of the weight portion 310 is released.

When the weight portion 310 or the handle 405 is pulled downward, the hook portion 320 integrated with the weight portion 310 rotates about the center shaft 213, (Not shown).

10 to 11, when the braking projection 403 of the lock plate 402 reaches the second stopper hole 215, the inside of the hook portion 320 is engaged with the catch side detachable portion 500 The detachment protrusion 501 is detachably attached to the outer peripheral surface.

The hydraulic cylinder 7 which is in contact with the inner side of the arm 1 in the state where the inside of the hook portion 320 and the detachment protrusion 501 are in close contact with the outer circumferential surface as described above can not be operated by the claw 5 The excavator adjuster grasps and rotates the handle 405 of the lock plate 402 in the reverse direction to prevent the detaching unit 500 of the lock hole 402 from being disengaged from the hook portion 320, The braking projections 403 on both sides are fitted into the second stopper holes 215 and the lock holes 406 fitted with the setting projections 312 are fitted to prevent the lock plate 402 from rotating .

The braking protrusion 403 of the lock plate 402 is fitted into the second stopper hole 215 and the lock hole 406 of the lock plate 402 is fitted into the setting protrusion 312, The gripper 5 is not released from the arm 1 by the double locking device of the lock plate 402 even if the ability to support the gripper 5 is lost due to a hydraulic pressure loss in the hydraulic system of the lock mechanism.

If the excavating operation is performed with the bucket 3 of the excavator in the state of being locked by the attaching / detaching projection 501 and the hook 320 as described above, even if the arm 1 is severely vibrated, The disengaging portion 500 of the clamp side does not move away from the arm side fixing portion 200 because the portion 320 does not flow.

If the above-described embodiment describes that the claw 5 is fixed to the arm 1 only when excavating using the bucket of the excavator, this time, in order to use the bucket 3 and the claw 5 simultaneously, A method of releasing the nippers 5 fixed to the body 1 will be described as follows.

The excavator adjuster is for releasing the braking protrusion 403 of the lock plate 402 fitted in the second stop hole 215. When the knob 405 of the lock plate 402 is artificially pulled, The lock hole 406 in the weight portion 310 is released to the setting protrusion 312 of the weight portion 310 and then the lock plate 402 is rotated to release the braking protrusion 403 from the second stop hole 215.

When the weight portion 310 is turned in the direction of the arm 1 in a state in which the braking protrusion 403 of the lock plate 402 is disengaged, the braking protrusion 403 is separated from the space . At this time, the hook portion 320 is separated from the attaching / detaching projection 501.

Thereafter, when the hydraulic cylinder 7 is operated to project and retract the cylinder rod, the claw 5 is moved downward while rotating around the shaft 4 of the quick coupler 2.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

In addition, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

100: Safety fastening device of a nippers for an excavator 200:
210: frame portion A: female side base
211: rotation operating groove 212: frame
213: center shaft 214: first stopper hole
215: second stopper hole 216:
220: elastic part 221: elastic receiving groove
222: Elastic braking plate 223: Elastic member
224: Clearance tightening bolt 225: Nut
226: guide protrusion 227: guide groove
300: a clamp hook portion 310: a weight portion
311: fastening rod 312: setting projection
320: hook portion 400: locking portion
401: coupling member 402; Lock plate
403: braking projection 404: hole
405: Handle 406: Locking hole
407: open hole 500:
B: Tongue base 501: Detachment projection
502: nut receiving groove 503: guide hole

Claims (9)

A bucket 3 which is mounted through a quick coupler 2 connected to an end of the arm 1 and a connecting shaft 2 which is opposed to the bucket 3 and which is connected to the quick coupler 2, And a mounting bracket 6 attached to an upper portion of one side of the arm 1 so as to be rotatable at both ends of the hydraulic cylinder 7, the claws 5 are selectively fixed to one side of the arm 1 by the operation of the hydraulic cylinder 7 so that the claws 5 are used only after the bucket 3 is used, (1) to the boom side to selectively separate the claws (5) from one side of the arm (1) when the use of the claws As a result,
The safety fixture (100) of the claw for a digger
First and second stopper holes are formed on the upper side of the female side base A coupled to the arm 1 and spaced apart from both sides of the rotary operation groove 211. The lower and upper stopper holes 216, And a resilient part (220) having an elastic receiving groove (221) formed on the lower side of the female side base (A);
A grip hook portion 300 accommodated in the rotary operation groove 211 so as to be freely rotatable and having a weight portion 310 having a center on the center of weight and a hook portion 320 on the lower side;
A lock plate 400 having a knob 405 formed at an upper portion of the weight portion 310 and a braking protrusion 403 formed at a lower portion thereof is integrally formed with a lock portion 400 rotatably provided by a coupling member 401,
An elastic damping plate 222 fixed to the upper portion of the elastic receiving groove 221 while receiving an elastic force of the elastic member 223;
A detachable protrusion (501) provided on the claw (5) in correspondence with an inner side surface of the hook part (320) and a clamp side base (B) fitted to the elastic part (220) (500). ≪ / RTI >
The method according to claim 1,
Wherein an upper surface of the engaging protrusion (216) of the frame part (210) and an inner surface of the resilient fret board (222) accommodated in the engaging protrusion are spaced apart from each other so as to receive an elastic force, Safety fasteners for claws.
The method according to claim 1,
A play adjusting bolt 224 is formed in the elastic receiving groove 221 of the elastic part 220 and the elastic member 223 and the elastic swash plate 222 are sequentially and sequentially inserted into the play adjusting bolt 224 And guide grooves 227 are formed on the lower side of the resilient fretting plate 222 corresponding to the guide protrusions 226 extending from the lower side of the elastic receiving recess 221. [ A safety device for a claw for a digger.
The method according to claim 1,
Wherein the inside of the hook portion (320) and the detachable protrusion (501) are either a right angle or a semicircle.
The method according to claim 1,
A setting hole 312 is formed in the upper part of the front surface of the weight part 310 and a locking hole 406 and an opening 407 are formed in the upper part of the locking plate 402 at a position corresponding to the setting protrusion. Safety fasteners for nippers.
The method according to claim 1,
A nut receiving groove 502 provided corresponding to a nut 225 provided in the elastic receiving groove 221 and a guide protrusion 226 provided in the elastic portion 220 are formed at the center of the gripping base B, Further comprising a guide hole (503) formed in the guide pin (503).
The method according to claim 1,
Characterized in that the first stopper hole (214) is provided on the horizontal plane of the frame (211) and the second stopper hole (214) is provided on an edge intersecting the horizontal plane and the vertical plane of the frame (211) Device.
The method according to claim 1,
Wherein the elastic member (223) is made of a compression coil spring.
The method according to claim 1,
Wherein the elastic member (223) is either a conical plate spring or an elastic rubber plate.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102087971B1 (en) * 2019-09-20 2020-03-11 유한회사 도원산업기계 Excavator claw safety pin stopper

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101300877B1 (en) 2011-09-29 2013-08-27 주식회사 제이케이 Safety apparatus of gripper for a excavator
KR101498650B1 (en) 2013-10-02 2015-03-11 주식회사 경원테크 Safety locking device of claws for excavators

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101300877B1 (en) 2011-09-29 2013-08-27 주식회사 제이케이 Safety apparatus of gripper for a excavator
KR101498650B1 (en) 2013-10-02 2015-03-11 주식회사 경원테크 Safety locking device of claws for excavators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102087971B1 (en) * 2019-09-20 2020-03-11 유한회사 도원산업기계 Excavator claw safety pin stopper

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