JP5670238B2 - Attachment with cutter for power shovel - Google Patents

Description

  The present invention relates to an attachment attached to the end of an arm of a power shovel, and particularly to an attachment including a grapple mechanism and a cutter mechanism suitable for crop harvesting such as sugarcane.

A power shovel, also referred to as a hydraulic excavator, has an attachment for pin-up operation at two locations, the tip of the arm and the tip of the front link, for vertical operation.
Typical attachments include buckets used for excavating earth and sand, grapples used for transporting building materials, building demolition, and the like.
On the other hand, the present invention relates to an attachment including a grapple mechanism and a cutter mechanism suitable for cutting and transporting a relatively heavy crop such as sugar cane.
Although patent document 1 discloses the crop cutting device provided in the tractor, it cannot be used for a power shovel.

French Patent No. 2,225,084

  An object of the present invention is to provide an attachment for a power shovel that includes a grapple mechanism and a cutter mechanism and can be used alone, and prevents crops from being wound around the slide cylinder portion of the cutter.

An attachment for a power shovel according to the present invention is an attachment to be attached to a tip portion of an arm of a power shovel , comprising a grapple part at an upper part and a cutter part having a rotary blade below the grapple part, the grapple part The left and right mounting plates attached to the tip of the arm of the power shovel are connected in parallel to a pair of pivot plates so as to be orthogonal to the horizontal direction, and are disposed oppositely between the upper and lower pivot plates. The left and right gripping claws are pivotally attached to the base side, and the tip parts are controlled to open and close each other. The cutter part can slide the rotary blade in the front-rear direction, and the slide mechanism is fixed to the mounting plate. An inner cylinder part is slidably arranged in a sealed state inside the cylinder part, and the inner cylinder part is formed by a cylinder and a piston rod built inside the outer cylinder part and the inner cylinder part. Is death control, characterized in that fitted with rotary blade via a rotary driving part attached to the distal end of the inner cylindrical portion.
If such an attachment is used, a tall crop such as sugar cane can be grabbed with a grapple and the root side can be cut and transported with a cutter.

A cutter may not be necessary for transporting wood.
Therefore, the present invention is also characterized in that the grapple part and the cutter part are detachably connected.

In addition, it is preferable that the cutter slides in the front-rear direction in order to harvest the crop after grabbing it with a grapple.
Therefore, in the present invention, the cutter portion can slide the rotary blade in the front-rear direction, and the slide mechanism has an inner cylinder portion slidably disposed inside the outer cylinder portion, and the outer cylinder portion and the inner cylinder portion It is preferable that the inner cylinder portion is protruded and retracted by a cylinder and a piston rod built in the inner side, and the rotary blade is attached via a rotation drive unit attached to the distal end portion of the inner cylinder portion.
If it does in this way, when cutting a crop, it can prevent that a crop wraps around the cylinder mechanism which constituted the slide part of a rotary blade.
In the present invention, the outer cylinder portion may be provided such that the foot portion can be adjusted in the vertical direction from the left and right side portions, and the rotary blade can be prevented from dropping more than necessary.

Since the attachment according to the present invention includes a grapple mechanism and a cutter mechanism, the attachment can be used for cutting and transporting crops only by being attached to the tip of the excavator.
Moreover, since a cutter part can be isolate | separated, it can be used also as a grapple attachment and a use expands.
Furthermore, since the cylinder and piston rod for sliding the rotary blade back and forth when cutting the crop are built into the outer cylinder and the inner cylinder protruding from the outer cylinder, the crop is wound around the slide cylinder. It can prevent sticking.

The external appearance perspective view of the attachment concerning the present invention is shown. Operation | movement explanatory drawing of the grapple part and cutter part of an attachment is shown. (A) is a state where the grapple is opened, (b) is a state where the grapple is closed, and (c) is a state where the rotary blade is advanced. The side view of an attachment is shown. (A) is a state where the rotary blade is retracted, (b) is a state where the rotary blade is advanced, and (c) is a state where the cutter part is removed from the grapple part. The front view of an attachment is shown and the cutter part shows sectional drawing of an outer cylinder part. (A) shows a cross-sectional view along line AA, (b) shows a state in which the crop is grasped and bound, and (c) shows a state in which the crop has been cut. The state where the attachment is attached to the power shovel is shown.

An example of the structure of the attachment according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the attachment 10 has a left and right mounting plates 11 and 12 attached to the tip of the excavator, a grapple portion 20 on which the left and right gripping claws 22 and 23 are opened and closed, and a cutter portion 30 on the lower side thereof. In the cutter unit, the drive unit 32 of the rotary blade 31 moves forward and backward by a slider 33.

The movement will be described with reference to FIGS.
(A) In the state where the left and right grip claws 22 and 23 of the grapple part 20 are open, the crop 4 is taken inside the grip claws 22 and 23 on both sides, and is gripped and bundled.
In this state, as shown in FIGS. 2B and 2C, when the rotary blade 31 moves forward, the crop is cut at the root side.
FIG. 6 shows a state in which such an attachment 10 is attached to the tip of the power shovel 1.
Attaching holes 11 a and 12 a shown in FIG. 1 are connected to the tip of the arm 2 of the power shovel 1, and attaching holes 11 b and 12 b are connected to the tip of the front link 3.

Next, a structural example of the grapple part 20 will be described with reference to FIGS.
The pivot plates 21 and 21 are connected vertically in parallel so as to be orthogonal to the left and right mounting plates 11 and 12 in the horizontal direction.
Between the upper and lower pivot plates, the base sides of the left and right grip claws 22 and 23 are pivotally attached via pivot shafts 21a and 21b.
The left and right gripping claws 22 and 23 are arranged opposite to each other so that the inside of the bow-shaped claw is a recess.
In this embodiment, the left and right gripping claws 22 and 23 are connected to the upper and lower arcuate claw tips by connecting plates 22b and 23b so that the left and right gripping claws 22 and 23 do not interfere with each other when the left and right gripping claws 22 and 23 are closed. A difference is provided in the length in the vertical direction of the connecting plate so that the left gripping claw 22 enters the inside of the right gripping claw 23 while being connected in the vertical direction.

The left and right gripping claws 22 and 23 are connected to the pivot shafts 21a and 21b by connecting the base sides of the upper and lower claws with connecting pipes 22a and 23a, and attaching a substantially triangular connecting bracket to the connecting pipe.
This embodiment will be described with the gripping claw shown in FIG. 5 (a) open. The left connecting bracket includes an upper link connecting bracket 25a and a lower cylinder connecting bracket 24b, and the right connecting bracket is The upper and lower tiers have an upper link coupling bracket 25c and a lower cylinder coupling bracket 24e having the same shape.
The left link connecting bracket 25a has a link shaft 25b positioned in front of the pivot shaft 21a in the state of FIG. 5A, and the right link connection bracket 25c is a link positioned rearward of the pivot shaft 21b. A shaft 25d is provided, and both ends of the synchronous link 25 are attached to the left and right link shafts 25b and 25d.
On the other hand, the lower cylinder connecting bracket 24b on the left side has a rotating shaft 24c located rearward of the pivot shaft 21a, and the right cylinder connecting bracket 24e rotates coaxially with the link shaft 25d of the synchronous link 25. The left and right rotating shafts 24c and 24d are connected to the rear portion of the cylinder 24 and the other to the tip of the piston rod 24a.
Therefore, when the piston rod 24a of the cylinder 24 protrudes and advances by a hydraulic circuit or the like not shown, the movement of the link connecting brackets 25a and 25c rotates via the synchronous link 25 as shown in FIG. The left and right grip claws close each other.
In this embodiment, the left and right stoppers 21c, 21d provided on the pivot plate 21 and the stoppers 22c, 23c provided on the claw side come into contact with each other to limit the closing angle of the gripping claws 22, 23.

Next, the structural example of the cutter part 30 is demonstrated based on FIG.
A mounting flange 30a provided at the upper part of the cutter unit 30 is provided on the lower part 12c of the mounting plates 11 and 12 so as to be removable via a fixing tool 40 such as a bolt.
FIG. 3C shows a state in which the cutter unit 30 is removed from the grapple unit 20.
The cutter unit 30 has a rotating rotary blade 31 attached to the drive unit 32 via a drive shaft 32a. The drive unit 32 is connected to the tip of the inner cylinder part 33c, and the inner cylinder part 33c is sealed from the outside. The inner cylinder 33b slides inside and outside.
A cylinder 33d and a piston rod 33e are built inside the inner cylinder part 33c and the outer cylinder part 33b, and the tip of the piston rod 33e is connected to the inner tip of the inner cylinder by a connecting part 33f.
Thereby, it is possible to move forward and backward while rotating the rotary blade 31 by the drive unit 32 only by connecting the hydraulic piping to the connection port 33a, and prevent the crop from being wound around the piston rod 33e.
Moreover, the foot part 34 is provided from the right and left side parts of the outer cylinder part 33 so that height adjustment is possible to an up-down direction.
The foot part 34 has left and right leg parts 34a, 34a and sled parts 34b, 34b attached horizontally to the front and rear direction at the lower ends of the leg parts to prevent the rotary blade 31 from being lowered more than necessary.

DESCRIPTION OF SYMBOLS 10 Attachment 11 Mounting plate 12 Mounting plate 20 Grapple part 21 Pivoting plate 22 Grasp claw 23 Grasping claw 24 Opening and closing cylinder 30 Cutter part 31 Rotary blade 32 Drive part 33 Slider 34 Foot part

Claims (2)

An attachment attached to the tip of the arm of a power shovel,
A grapple part at the top and a cutter part having a rotating blade on the lower side of the grapple part ,
The grapple part is connected to the left and right mounting plates attached to the tip of the arm of the power shovel, and a pair of pivot plates are connected in parallel vertically so as to be orthogonal to the horizontal direction,
The base side of the left and right gripping claws arranged opposite to each other between the upper and lower pivot plates is pivotally attached, and the tips are controlled to open and close each other.
The cutter part can slide the rotary blade in the front-rear direction, and the slide mechanism has an inner cylinder part slidably disposed in a sealed state inside the outer cylinder part fixed to the mounting plate, and the outer cylinder part The inner cylinder part is controlled to project and retract by a cylinder and a piston rod built inside the inner cylinder part, and a rotary blade is attached via a rotation drive part attached to the tip part of the inner cylinder part. Attachment for excavators. The power shovel according to claim 1, wherein the outer cylindrical portion is provided with foot portions that can be adjusted in height in the vertical direction from the left and right side portions, and the rotating blade is prevented from being lowered more than necessary. Attachment for.

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