KR20130142003A - Clamping apparatus for attachment of excavator - Google Patents

Abstract

The present invention relates to a clamping device for an attachment for an excavator capable of improving the work efficiency of the excavator by connecting the boom and the attachment of the excavator and supporting the attachment in a way that the attachment can be tilted or rotated. According to the present invention, a clamping device for an attachment for an excavator includes a first clamper which is combined to the boom of the excavator; a second clamper which is engaged to the attachment; and a rotating unit which is installed between the first clamper and the second clamper and rotates the attachment against an axis extended in a vertical or horizontal direction. According to the present invention, the clamping device for an attachment for an excavator is capable of adjusting the work direction of the attachment, thereby improving the work efficiency. Furthermore, the device is compatible with the existing excavator, thereby minimizing the burden on a user.

Description

Clamping apparatus for attachment of excavator

The present invention relates to a clamping device for an attachment for an excavator, and more particularly, an attachment for an excavator that can improve the working capacity of the excavator by interconnecting the boom and the attachment of the excavator and supporting the attachment to enable tilting and rotational driving. It relates to a clamping device of.

In general, an excavator is a heavy equipment that excavates the ground for building foundation construction of the construction site. Such excavators are designed to perform work through attachments mounted via clamps at the tip of the boom.

There are various types of attachments mounted on an excavator, and the most commonly used are buckets for embedding soil or sand, and other forms of drills, compactors, cutters, and tongs.

A clamp for coupling such an attachment to the boom is typically a body 15 mounted to the tip of the boom and a first support of the bucket 10 as shown in FIGS. 1 and 2. The first ring 25 coupled to the circumference of the shaft 12 and the second support shaft 14 of the bucket 10 are rotatably coupled around the first hinge shaft 33 on the other side of the body 15. The second ring 35 rotatably coupled to the circumference and fixed to the body 15, the cylinder rod 47 is centered on the second hinge shaft 37 in the second ring (35) It is configured to include a cylinder 45 coupled to.

However, since such a conventional clamp can merely attach the attachment to the boom, it can not perform the function of converting the attachment into various working directions. In order to change the working direction of the attachment, the body must move, There is a problem in that it is limited.

Korean Patent Laid-Open Publication No. 2011-0034708 discloses a structure capable of variously changing the working direction of an attachment of an excavator. The disclosed prior art relates to a three-dimensional work type excavator, and discloses a structure that can freely change the excavation direction by a bucket without turning the cab. The disclosed prior art has an arm hinged to an end of the boom of the excavator, respectively. It is composed of a fixed arm and an independent structure of the rotating arm, the fixed arm is hinged to the boom end, the rotary arm is connected to the fixed arm to be rotated 360 ° by the rotating portion, is hinged to the end of the rotary arm It is adapted to include a bucket portion operated by a bucket actuating cylinder. In the case of the prior art, the boom itself is to be rotated, the turning operation is possible only in a dedicated excavator for this purpose, and in the case of a conventional excavator is incompatible, so to carry out this function requires the purchase of an additional vehicle, the burden on the user is large. There is only a problem.

The present invention has been created to solve the above problems, can be easily mounted on a conventional excavator, and can be tilted or rotated attachment to easily adjust the working direction of the attachment to improve the working capacity of the excavator It is an object of the present invention to provide a clamping device for an attachment for an excavator.

Clamping device for an attachment for an excavator according to the present invention for achieving the above object is provided between the first clamper coupled to the boom of the excavator, the second clamper is fastened to the attachment, and the first clamper and the second clamper It is provided with a rotary drive for rotating the attachment about the axis extending in the vertical direction or in the horizontal direction.

The rotary drive unit is installed between the two first brackets extending downward from the first clamper and spaced in the front-rear direction, a piston slidably installed in the front-rear direction in the inner space of the cylinder, and A tilting unit extends to penetrate both ends of the cylinder and includes a rotating shaft rotatably supported at both ends by the first bracket, wherein the cylinder includes first, second, and second hydraulic fluids introduced or discharged into the inner space on both sides thereof. 2 ports are formed, a first spline is formed on one side of the inner circumferential surface, and a second spline is formed on one side of the outer circumferential surface to engage rotation with the first spline to block rotation in the cylinder. Fluid flows between the inner spaces of the cylinders A sealing member for blocking is formed, and a hollow having a first gear part formed on one side inner circumferential surface and penetrating a front and rear surface along a longitudinal direction therein, and the rotating shaft is provided in the one side section passing through the piston. Preferably, the second gear part is engaged with the gear part and guides the rotational shaft to rotate when the piston slides back and forth.

The rotation driving unit is a main body installed in the lower portion of the first clamper, a worm wheel rotatably installed around the vertical axis in the interior of the main body, a worm driven by the worm wheel, and is installed on one side of the main body It is preferable to include a drive motor for rotating the worm and a rotation unit connected to the worm wheel and rotating together with the worm wheel and extending downward to vertically engage with the second clamper.

The rotation driving unit includes a tilting unit for rotating the second clamper and the attachment about a rotation axis extending in the horizontal direction, and a rotation unit for rotating the second clamper and the attachment about the vertical axis extending in the vertical direction, The tilting unit is installed between two first brackets extending downward from the first clamper and spaced in the front-rear direction and having first and second ports formed at both sides thereof so that hydraulic fluid flows into or out of the internal space. One side of the inner circumferential surface is formed with a cylinder formed with a first spline, and a second spline is formed so as to be slidable in the front and rear direction in the inner space of the cylinder and engaged with the first spline on one side of the outer circumferential surface to block rotation in the cylinder. On the other side of the outer circumferential surface, the flow of hydraulic fluid on both sides is blocked. A piston having a sealing member formed therein and having a hollow having a first gear portion formed at one inner circumferential surface and penetrating the front and rear surfaces along a longitudinal direction, and extending to penetrate both ends of the piston and the cylinder. And a rotation shaft rotatably supported by the first bracket and having a second gear portion formed at one side portion passing through the piston to engage with the first gear portion to rotate when the piston moves forward and backward. The unit is installed in the lower portion of the first clamper and fastened to both ends of the rotary shaft and rotated together with the rotary shaft, the worm wheel is rotatably installed around the vertical axis in the interior of the main body, the worm wheel A worm, a drive motor installed at one side of the main body and rotating the worm, and the worm wheel It is preferable to include a vertical axis that is connected to rotate with the worm wheel and extends downward to engage with the second clamper.

The second clamper is a clamping body installed in the rotating drive unit, a fixing hook which is fastened to one of the fixing pins of the two fixing pins installed on the lower portion of the clamping body and fixed to the attachment, and slidably installed on the clamping body And a hydraulic hook fastened to the other fixing pin which is not fastened to the fixing hook, and a hydraulic cylinder installed at the clamping body to drive the movable hook forward and backward to engage or separate the movable hook from the other fixing pin. It is preferable.

The second clamper further includes safety means for maintaining the engagement state of the one side fixed pin coupled to the fixed hook when the movable hook is retracted by the hydraulic cylinder and the other side fixed pin is separated from the movable hook, The safety means is coupled to the withdrawal rod of the hydraulic cylinder and the sliding plate is installed on the lower side of the one side, rotatably installed on the fixed hook side to rotate downward to hold the fixing pin with the fixing hook A safety ring is provided, wherein the safety ring has a protrusion protruding upward, and the sliding plate presses the safety ring downward when the movable hook is retracted to be separated from the other fixing pin, and the protrusion penetrates. The long hole is formed to guide the safety ring to rotate upward when the projection is caught by the advance It is.

Clamping device for an attachment for an excavator according to the present invention having the above configuration can be adjusted in various ways the working direction of the attachment can improve the work ability, can be easily compatible with the conventional excavator and the attachment can minimize the burden on the user There is an advantage to that.

1a and 1b show a clamper for an attachment of the prior art,
2 is a perspective view illustrating a state in which an attachment is mounted on an excavator through a clamping device of an attachment for an excavator according to the present invention;
3 is a perspective view showing a first embodiment of a clamping device for an attachment for an excavator according to the present invention,
Figure 4 is an exploded perspective view of the clamping device of the attachment for an excavator of Figure 3,
5 is a cross-sectional view showing a tilting unit of the clamping device of the attachment for the excavator of FIG.
6 is a front view showing a tilting state of the attachment by the tilting unit of the clamping device of the attachment for excavator of FIG.
7 is a cross-sectional view showing a rotating unit of the clamping device of the attachment for excavator of FIG.
8 is a side view showing a rotation state of the attachment by the rotating unit of FIG.
9 is a perspective view showing a second embodiment of the clamping device of the attachment for excavator;
10 is an exploded perspective view of the second clamper of FIG. 9;
FIG. 11 is a cross-sectional view of the second clamper of FIG. 9;
12 is a perspective view showing a third embodiment of the clamping device of the attachment for excavator.

Hereinafter, with reference to the accompanying drawings will be described in more detail the clamping device (hereinafter referred to as 'clamping device') of the attachment for excavators.

As shown in FIG. 2, the clamping device 10 of the present invention interconnects the boom 3 of the excavator 1 and the attachment 2 for work, and variously adjusts the working direction of the attachment 2. It is to ensure that.

Although the bucket is shown as an attachment 2 in the present embodiment, the attachment 2 coupled to the boom 3 by the clamping device 10 of the present invention has a variety of operations such as tongs, rippers, breakers, drills, and the like. Organizations may be applied. In addition, in the case of the present embodiment will be described with respect to the excavator (1), but is applicable to a variety of heavy equipment to perform the work by mounting the attachment (2).

3 to 8 show a first embodiment of the clamping device 10 of the present invention.

The clamping device 10 includes a first clamper 100 coupled to the boom 3, a second clamper 400 coupled to the attachment 2, and a rotation driving unit connecting the first clamper and the second clamper. The rotation driving unit includes a tilting unit 200 installed below the first clamper 100, and a rotation unit 300 connected to the tilting unit 200 and also fastened to the second clamper 400. .

The first clamper 100 is connected to the boom (3) of the excavator (1), it is usually in the upper portion so that the fastening can be made by two fixing pins, like the boom 3 and the attachment is coupled Two pin fixing holes 110 are formed. And a first bracket 120 spaced a predetermined distance from the front and rear bars is formed at the lower portion.

The tilting unit 200 is for tilting the attachment 2 about the rotation axis 230 extending in the forward and backward directions with respect to the boom 3.

The tilting unit 200 has one end and the other end fixed to the first bracket 120, respectively, and has a cylinder 210 having a predetermined space therein, and the cylinder 210 is slidable in the front-rear direction. A piston 220 is installed, and a rotating shaft 230 penetrating the piston 220 and both ends penetrate the cylinder 210 so as to be rotatably installed on the first bracket 120.

The cylinder 210 has ports for allowing hydraulic oil to be introduced or discharged into the inner space at one side and the other end thereof, respectively, and the first spline 213 is formed to extend a predetermined length on the other inner circumferential surface thereof. have. In addition, a through hole is formed at one side and the other side of the cylinder 210 so that the rotary shaft 230 penetrates and extends to the outside, respectively, and a first sealing member for preventing hydraulic oil from leaking through the through hole. 215 are embedded.

The piston 220 is slidably installed in the cylinder 210. On one side of the outer circumferential surface of the piston 220, a second spline 221 engaging with the first spline 213 is formed so that the piston 220 ) Is engaged with the first spline 213 to allow sliding only along the longitudinal direction of the cylinder 210 in a restricted rotation state. In addition, the second sealing member 222 is installed on one side outer circumferential surface of the piston 220 to contact the inner wall of the cylinder 210 to block the movement of the hydraulic oil between the spaces on both sides of the cylinder 210 about the piston 220. It is. Therefore, when hydraulic oil flows into the first port 211, the piston 220 moves toward the second port 212, and the hydraulic oil on the second port 212 side moves out of the cylinder 210 through the second port 212. On the contrary, when the hydraulic oil flows in through the second port 212, the piston 220 moves toward the first port 211, and the hydraulic oil on the side of the first port 211 passes through the first port 211. 210) It is discharged to the outside.

In addition, the piston 220 is formed with a hollow 223 extending in the longitudinal direction so that the rotary shaft 230 can penetrate, the first gear portion 224 is formed on the inner peripheral surface of the hollow 223 have.

The rotary shaft 230 is installed to pass through the interior of the cylinder 210 as described above, both ends protrude out of the cylinder 210 to be rotatably installed on the first bracket 120, the piston On the outer circumferential surface of the through part penetrating 220, a second gear part 231 meshed with the first gear part 224 is formed.

As described above, when the piston 220 is slid and moved, the piston 220 is slidably moved along the longitudinal direction of the cylinder 210 because the first and second splines 213 and 221 are engaged with each other. The rotating shaft 230 connected through the gear units 224 and 231 rotates in the forward or reverse direction.

The rotation unit 300 is for rotating the attachment (2) around the vertical axis 350 connected up and down.

Rotating unit 300 has a main body 310, both ends of which are coupled to the rotating shaft 230 and integrally rotated with the rotating shaft 230, and a worm wheel 320 embedded in the main body 310 and rotatably installed. It is installed on one side of the main body 310, the worm 330 is engaged with the worm wheel 320, the drive motor 340 for driving the worm 330, coupled with the worm wheel 320 and extends up and down It has a vertical axis 350.

The main body 310 is formed with a second bracket 311 corresponding to the first bracket 120, the second bracket 311 is coupled to the rotary shaft 230, the main body according to the rotation of the rotary shaft 230 The whole 310 is rotated about the rotation axis 230.

When the worm 330 rotates as the driving motor 340 is driven, the worm wheel 320 meshing with the worm 330 is also rotated by the rotation of the driving motor 340. [ As the vertical shaft 350 connected to the worm wheel 320 rotates together with the worm wheel 320, the second clamper 400 supporting the attachment 2 described later rotates to adjust the working direction of the attachment 2 .

The second clamper 400 has an upper end connected to the vertical shaft 350, and the clamping body 410 is rotated together with the vertical shaft 350, a fixing hook 420 installed below the clamping body 410 and The movable hook 430 and the hydraulic cylinder 440 which advances and moves the movable hook 430 are comprised.

The fixing hook 420 is fixed to the clamping body 410, and is formed in a ring shape in which a portion of the outer direction is opened for fastening the fixing pin. One of the two fixing pins provided on the attachment 2 is fastened to the fixing hook 420.

The movable hook 430 is to fix or detach the attachment 2 while being engaged and separated from the other fixing pin while driving back and forth by the hydraulic cylinder 440. The movable hook 430 has an opening to allow the fixing pin to be inserted in a direction opposite to the fixed hook 420. The movable hook 430 is connected to the drawing rod 441 of the hydraulic cylinder 440, The movable hook 430 is retracted and retracted to be fastened to or separated from the fixing pin. When the attachment 2 is replaced or detached, the replacement hook can be easily replaced or detached.

9 shows a second embodiment of the clamping device 20.

The clamping device 20 according to the present embodiment is provided with only the tilting unit 200 between the first and second clampers 100 and 500, and rotates around the rotating shaft 230 in which the attachment 2 extends in the front-rear direction. When it is necessary only to change the working direction to do so, except for the configuration of the rotating unit 300, the clamping device 20 can be configured only by the first and second clampers (100,500) and the tilting unit (200).

The first clamper 100 and the tilting unit 200 of the present embodiment are the same as the first embodiment.

The second clamper 500 has a second bracket 510 is formed on the upper surface to be coupled to the rotary shaft 230 of the tilting unit 200, the safety means 520 as shown in Figs. It includes.

In the second clamper 500 of the present embodiment, a sliding plate 521 is installed between the movable hook 530 and the drawing rod 551 of the hydraulic cylinder 550, and the safety hook rotatable on the fixed hook 540 side. 524 is provided.

One side of the sliding plate 521 is coupled to an end of the withdrawal rod 551, and the movable hook 530 is provided on a lower surface of the withdrawal rod 551, so that the sliding plate 521 slides according to the advancing and driving of the withdrawal rod 551. As the 521 is advanced, the movable hook 530 is moved.

On the other side of the sliding plate 521, a slot 523 extending along the longitudinal direction and penetrating the upper and lower surfaces is formed.

The safety ring 524 is rotatably installed on the fixing hook 540 side, and holding the fixing pin so that the fixing pin for fastening with the attachment 2 together with the fixing hook 540 when rotated downward. Do the mechanics. The safety ring 524 is protruded upward on one side of the upper portion is provided with a protrusion 525 protruding upward through the long hole 523 of the sliding plate 521, the front of the protrusion 525 is the sliding plate When the 521 is retracted to the rear, the pressure is applied in the direction in which the holding pin is held by the lower surface of the sliding plate 521 so that the holding hook 540 and the holding pin are held. . The safety ring 524 is pressed downward by the sliding plate 521 in a state in which the sliding plate 521 is retracted and fixed in a state of holding the fixing pin together with the fixing hook 540, and the sliding plate 521. When moving forward, the safety ring 524 rotates upward while the protrusion 525 is caught at the end of the long hole 523.

The safety means 520 included in the second clamper 500 of the present embodiment is moved to the other fixing pin as the movable hook 530 is retracted backward due to a malfunction of the attachment 2 or a malfunction of the hydraulic cylinder 550. When the coupling is released, the fixing pin coupled to the fixing hook 540 is fixed so as not to be separated from the second clamper 500 to prevent the attachment 2 from falling down toward the worker.

As described above, when the withdrawal rod 551 of the hydraulic cylinder 550 is retracted and the movable hook 530 is retracted so that the engagement with the fixing pin is released, the sliding plate 521 is also retracted with the safety ring 524. Pressing downward, the fixing is made in a state in which the fixing pin of one side is held by the fixing hook 540 and the safety ring 524. Therefore, even if the fixing pin coupled to the movable hook 530 side is separated, the at least one fixing pin is maintained in the fixed state to the second clamper 500, so that the attachment 2 is completely separated from the second clamper 500. It can prevent falling.

12 is a third embodiment of the clamping device 30, the clamping device 20 of the present embodiment is provided with a first, a second clamper (100, 400) and a rotating unit (300). When it is necessary to rotate the attachment 2 only around the vertical axis 350 extending up and down, the clamping device 30 is configured to omit the tilting unit 200 and include only the rotating unit 300.

Since the clamping device 10, 20, 30 according to the present invention described above includes both the tilting unit 200 and the rotating unit 300 or selectively includes any one of the clamping devices 10, 20, and 30 through the tilting unit 200. As shown in FIG. 1, the attachment direction of the attachment 2 may be adjusted by rotating the attachment 2 about the rotation shaft 230 extending along the front and rear directions at the lower portion of the boom 3. In addition, as shown in FIG. 8, the rotation unit 300 may rotate the attachment 2 about the vertical axis 350 extending up and down to change the working direction of the attachment 2, thereby working on the attachment 2. Improve your skills.

Clamping device of the attachment for excavators according to the present invention can be easily adjusted in various directions to the working direction of the attachment can maximize the work capacity and work efficiency of the excavator is high industrial availability.

10, 20, 30; Clamping device
100; First clamper
200; Tilting Unit
210; cylinder
211; First port 212; Second port
213; First spline 214; Through hole
215; First sealing member
220; piston
221; Second spline 222; The second sealing member
223; Hollow 224; First gear
230; Rotating shaft
231; Second gear part
300; Rotation unit
310; Main body 320; Worm wheel
330; Worm 340; Drive motor
350; Vertical axis
400; 2nd clamper
410; Clamping body 420; Fixed hook
430; Movable hook 440; Hydraulic cylinder
500; 2nd clamper
510; 2nd bracket
520; Safety measures
521; Sliding plate 522; Joiner
523; Long 524; Safety hook
525; Protrusion
530; Movable hook
540; Fixed hook

Claims (6)

A first clamper coupled to the boom of the excavator;
A second clamper fastened to the attachment;
And a rotation driving part installed between the first clamper and the second clamper to rotate the attachment about an axis extending in the vertical direction or in the horizontal direction. 2. The method of claim 1,
The rotary drive unit is installed between the two first brackets extending downward from the first clamper and spaced in the front-rear direction, a piston slidably installed in the front-rear direction in the inner space of the cylinder, and It is provided with a tilting unit extending to penetrate both ends of the cylinder and both ends including a rotating shaft rotatably supported on the first bracket,
The cylinder has first and second ports formed at both sides thereof so that hydraulic fluid flows into or out of the internal space, and a first spline is formed at one side of the inner circumferential surface thereof.
The piston has a second spline which is engaged with the first spline on one outer circumferential surface to block rotation in the cylinder, and on the other outer circumferential surface the hydraulic fluid flows between the two inner spaces of the cylinder about the piston. The sealing member is formed, the inside is provided with a hollow penetrating the front and rear surfaces along the longitudinal direction and the first gear portion is formed on one inner peripheral surface,
The rotating shaft is clamping device of the attachment for excavators, characterized in that the second gear portion is engaged with the first gear portion in one section passing through the piston to guide the rotating shaft to rotate during the forward and backward sliding movement of the piston. The method of claim 1,
The rotation driving unit is a main body installed in the lower portion of the first clamper, a worm wheel rotatably installed around the vertical axis in the interior of the main body, a worm driven by the worm wheel, and is installed on one side of the main body And a drive motor for rotating the worm, and a rotating unit connected to the worm wheel, rotating together with the worm wheel, and extending downward to include a vertical shaft engaged with the second clamper. The method of claim 1,
The rotation driving unit includes a tilting unit for rotating the second clamper and the attachment about a rotation axis extending in the horizontal direction, and a rotation unit for rotating the second clamper and the attachment about the vertical axis extending in the vertical direction,
The tilting unit is installed between two first brackets extending downward from the first clamper and spaced in the front-rear direction and having first and second ports formed at both sides thereof so that hydraulic fluid flows into or out of the internal space. One side of the inner circumferential surface is formed with a cylinder formed with a first spline, and a second spline is formed so as to be slidable in the front and rear direction in the inner space of the cylinder and engaged with the first spline on one side of the outer circumferential surface to block rotation in the cylinder. On the other side of the outer circumferential surface is formed a sealing member for blocking the flow of the hydraulic fluid in the cylinder inner space and the inside is provided with a hollow hollow penetrating the front and rear surfaces along the longitudinal direction and the first gear portion is formed on one inner peripheral surface, the piston And extend through both ends of the cylinder, and both ends of the first Is rotatably supported in the jacket, and a second rotation axis, which is the gear portion is formed for guiding engagement with said first gear portion on one end section extending through the piston so as to rotate forward and backward sliding movement of the piston,
The worm wheel is installed inside the body so as to be rotatable about a vertical axis. The worm wheel is rotatably mounted on the worm wheel. The worm wheel is rotatably mounted on the worm wheel, And a vertical shaft which is connected to the worm wheel and rotates together with the worm wheel and extends downward and is engaged with the second clamper. The clamping device of the attachment for an excavator. 5. The method according to any one of claims 2 to 4,
The second clamper is a clamping body installed in the rotating drive unit, a fixing hook which is fastened to one of the fixing pins of the two fixing pins installed on the lower portion of the clamping body and fixed to the attachment, and slidably installed on the clamping body And a hydraulic hook fastened to the other fixing pin which is not fastened to the fixing hook, and a hydraulic cylinder installed at the clamping body to drive the movable hook forward and backward to engage or separate the movable hook from the other fixing pin. Clamping device of the attachment for the excavator. 6. The method of claim 5,
The second clamper further includes safety means for maintaining the engagement state of the one side fixed pin coupled to the fixed hook when the movable hook is retracted by the hydraulic cylinder and the other side fixed pin is separated from the movable hook,
The safety means is coupled to the withdrawal rod of the hydraulic cylinder and the sliding plate provided with the movable hook on one side lower;
It is rotatably installed on the fixing hook side and provided with a safety ring for holding the fixing pin together with the fixing hook by rotating downward,
The safety ring is formed with a protrusion protruding upward, the sliding plate is pushed down the safety ring when the movable hook is retracted to be separated from the other fixing pin, and the protrusion is penetrated through the protrusion Clamping device of an attachment for an excavator, characterized in that the long hole is formed to guide the hook to rotate upward.

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