JP2015085396A - Attachment for work and work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment which is attached to an arm of a work machine and solves problems with conventional attachments such as a complex structure and high cost.SOLUTION: An attachment 1 for work is attached to a tip of the arm of the work machine to crush an object and includes: a base part having an attachment part attached to the arm; a hydraulic motor provided at the base part; a rotary shaft which is directly connected with a rotary shaft of the hydraulic motor and has an eccentric weight which generates vibration by rotation; a chisel which is connected with the rotary shaft and vibrates; and a pivot arm which is swingably connected with the chisel and the base part and supports the chisel.

Description

  The present invention relates to a work attachment and work machine that can be used mainly as a crusher or attached to a chiseling machine, compacting machine, slope leveling machine, pile driving machine, etc. in other civil engineering and construction sites. It is.

  2. Description of the Related Art Conventionally, as an example of a crusher, an excavation work vehicle in which a bucket for excavation is provided at the tip of an arm of a work machine that can run freely through a vibration cylinder for vibration, and a crushing mechanism projects from the bucket. Is known (see Patent Document 1). High pressure oil is supplied to the vibration cylinder, and an impact in the axial direction is applied to the object by the crushing chisel of the crushing mechanism to crush the object. Also known is a method in which a pair of eccentric gears are rotated by a hydraulic motor, and the generated rotational vibration is accumulated and amplified by an accumulator, and the object is crushed by concentrating the vibration on the tooth at the arm tip (non-patent document). 1).

JP-A-8-326090

“Front Attachment Products” [online] December 1, 2010, Furukawa Drill Rock Co., Ltd. [Search October 28, 2013], Internet <http://www.furukawarockdrill.co.jp/seihin_jyouhou/seihin- index.htm # 09>

  However, in the conventional crusher, etc., the structure of the vibration cylinder repeatedly reciprocates the piston and piston rod at a high frequency, so that the structure for supplying high-pressure oil with high precision by the rotation of the fluid motor becomes complicated and manufactured. Cost increases. In addition, in the method of imparting vibration by rotating the eccentric gear, which is a pair of eccentric gears, the vibration is transmitted from the pair of eccentric gears connected by two piped arms. The vibration structure is complicated and the manufacturing cost increases. The work attachment and work machine according to the present invention have been proposed in order to solve such problems.

The gist for solving the above-mentioned problems of the work attachment according to the present invention and achieving the object is an attachment that is attached to the tip of an arm of a work machine and crushes an object, and has an attachment portion that is attached to the arm. A base, a hydraulic motor provided on the base, a rotary shaft directly connected to the rotary shaft of the hydraulic motor and having an eccentric weight that generates vibration by rotation;
A chisel that is connected to the rotating shaft and vibrates, and a pivot arm that is swingably connected to the chisel and the base and supports the chisel.

  One end of the pivot arm is connected to the intermediate part of the chisel, and the end or part of the chisel acts on the object.

  In addition, one end of the pivot arm is connected to the end of the chisel, and the end or part of the pivot arm acts on the object.

  The gist of the working machine according to the present invention is that the working attachment according to the present invention is attached to the tip of the arm of the self-propelled working machine.

  According to the work attachment of the present invention and the work machine equipped with the work attachment, the rotation shaft having the eccentric weight is directly coupled by the rotation shaft of the hydraulic motor and rotated to generate vibration. There is little loss of vibration, the structure is simple, quiet, the structure is not complicated without the need for an accumulator, and the manufacturing cost is reduced. Further, the present invention has many excellent effects that the overall weight is reduced and maintenance is easy.

It is a side view of 1st Example by the attachment 1 which concerns on this invention. It is a front view in 1st Example of the attachment 1 which concerns on the same invention. It is a side view which shows 2nd Example by the attachment 1 which concerns on the same invention. It is a side view which shows 3rd Example by the attachment 1 which concerns on the same invention. It is a side view which shows the 4th Example by the attachment 1 which concerns on the same invention. It is a side view which shows 5th Example by the attachment 1 which concerns on the same invention. It is a side view which shows 6th Example by the attachment 1 which concerns on the same invention.

  As shown in FIG. 1, the working attachment 1 according to the present invention directly connects a rotating shaft 3 having an eccentric weight 3 a to a hydraulic motor 7, and vibrates a chisel with a quiet rotation by a single shaft type.

  The working attachment 1 according to the present invention is attached to the tip of an arm of a self-propelled working machine that is self-propelled by a crawler or the like as shown in FIGS. 1 to 2, for example, an object such as a rock or a concrete object. It is an attachment that crushes.

  The structure of the working attachment 1 includes a base 2 that is a pair of steel plates facing each other and has mounting portions 8a and 8b that are through-holes that are attached to the arm through a connecting shaft (not shown). 2 and a rotating shaft 3 having an eccentric weight 3a which is directly connected to the rotating shaft of the hydraulic motor 7 and generates vibrations by rotation.

  The rotating shaft 3 is pivotally supported by a bearing portion of a base 2 that is the pair of opposed steel plates. There is a chisel 6 made of steel and vertically elongated and connected to the rotary shaft 3 so that the upper end portion thereof is rotatably connected and vibrates. The chisel 6 vibrates up and down by the eccentric rotation of the rotating shaft 3. The amount of eccentricity is an arbitrary setting item. In the figure of the chisel 6, a crushing tooth 5 having a sharp tip is fixedly provided at a lower tip portion.

  Between the intermediate portion of the chisel 6 and the base portion 2, shaft portions 9a and 9b at both ends are rotatably connected, and the vibration for crushing the chisel 6 is supported by swinging around the shaft portion 9b. A pair of left and right steel pivot arms 4 is provided.

  In the work attachment 1 configured as described above, when the high-pressure oil is supplied to the hydraulic motor 7, the hydraulic motor 7 rotates, and the rotating shaft 3 directly connected thereto rotates, so that the chisel 6 moves up and down. The rocks are crushed by the tooth 5 at the tip thereof.

  The work attachment 1 is not limited to the first embodiment, and can be made an attachment suitable for other construction / civil engineering work by changing the positions of the fulcrum and the force point / action point. For example, as a second embodiment, as shown in FIG. 3, the chisel 6 is shortened, a part of the pivot arm 4 is connected to the end thereof, and the pivot arm 4 is curved. The tooth 5 is extended and fixed to the tip of the arm extending portion 4a.

  According to the working attachment 1 according to the second embodiment, the chisel 6 moves up and down by the rotation of the hydraulic motor 7, the arm extending portion 4a swings around the shaft portion 9b, and the tip portion is chopped. Vibrate. Thereby, the crushing work of asphalt etc., such as a rock crushing work, can be performed with the tooth 5 at the tip.

  As a third embodiment of the working attachment 1 according to the present invention, as shown in FIG. 4, the shape of the arm extending portion 4a in the second embodiment is substantially extended as shown in the figure. The portion 4b is formed, and the shaft portion 9b side is the apex, and a work such as a slope is compacted at the bottom.

  As a fourth embodiment of the working attachment 1 according to the present invention, as shown in FIG. 5, an arm extending portion 4c is formed as shown in the figure, and its working surface is made into a net bucket and a working bucket. To do. The arm extending portion 4c swings left and right around the shaft portion 9b. Soil, rocks, crushed stones, etc. are scooped up from the opening 4d and screened with a net to remove the scraps and the like.

  As a fifth embodiment of the working attachment 1 according to the present invention, as shown in FIG. 6, the side wall portion of the chisel 6 is formed as shown in the drawing with respect to the first embodiment, and the net portion 6a is formed. The fourth embodiment and the application are the same as the removal bucket, but rotate around the rotation shaft 3 and swing differently.

  As a sixth embodiment of the working attachment 1 according to the present invention, as shown in FIG. 7, a part of the chisel 6 is formed with a pile driving portion 6c as shown. And the pile cap 10 is fixed to the outer surface of the pile driving portion 6c. As shown in the figure, the pile cap 10 has a small width of vibration on the side close to the rotating shaft 3 and a large width of vibration on the side far from the rotating shaft 3.

  As shown in FIG. 7, the pile cap 10 is used to drive a small-diameter pile 11 into the ground or the like.

  The uniaxial crushing attachment 1 according to the present invention is attached to the tip of an arm of a self-propelled working machine to form a crusher (not shown) according to the present invention. The rotating shaft 3 that generates vibrations is directly rotated by the hydraulic motor 7 and is further transmitted directly to the chisel 6 so that the structure is simple and easy to maintain, and it is almost silent and extremely efficient. Can be done, such as slope consolidation, sieving, pile driving, etc.

  The attachment 1 according to the present invention and the crusher to which the attachment 1 is attached can be used for a repelling machine, a compacting machine, a slope leveling machine, a pile driving machine, etc. in addition to a ripper.

1 attachment,
2 base,
3 Rotating shaft 3a Eccentric weight 4 Pivot arm
4a, 4b, 4c arm extension part,
4d opening,
5 tooth,
6 Chisel, 6a Net part,
6b opening, 6c pile driving part,
7 Hydraulic motor,
8a, 8b mounting part,
9a, 9b shank,
10 Pile cap,
11 Pile.

Claims (4)

An attachment that is attached to the tip of an arm of a work machine and crushes an object,
A base having a mounting portion for mounting on the arm;
A hydraulic motor provided at the base;
A rotary shaft that is directly connected to the rotary shaft of the hydraulic motor and has an eccentric weight that generates vibration by rotation;
A chisel that is coupled to the rotating shaft and vibrates;
A pivot arm that is swingably connected to the chisel and the base and supports the chisel;
Working attachment characterized by One end of the pivot arm is connected to the middle part of the chisel, and the end or part of the chisel acts on the object,
The work attachment according to claim 1. One end of the pivot arm is connected to the end of the chisel, and the end or part of the pivot arm acts on the object,
The work attachment according to claim 1. The work attachment according to any one of claims 1 to 3 is attached to the tip of an arm of a self-propelled working machine,
A working machine characterized by

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