JP2007284986A - Cutting or gripping attachment for shovel type excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting or gripping attachment for a shovel type excavator, which can omit a hydraulic cylinder and a hydraulic pipe specially for opening/closing operation, is simple in structure, low in production cost, and eliminates the problems wherein cutting or gripping work of the attachment is hindered due to the presence of the hydraulic pipe as an obstruction, the service life of the attachment is degraded due to failure of the hydraulic pipe, and the maintenance frequency of the hydraulic pipe is increased. <P>SOLUTION: According to the structure of the cutting or gripping attachment for the shovel type excavator, a proximal end of a fixture support section 10A is connected to and supported by a distal end of an arm 2 of a boom section 1, and a pair of opening/closing arms 11, 12 provided for an opening/closing section 10B are connected to a distal end of the fixture support portion 10A in a manner openable along an almost horizontal plane. Then a link member 7 at a distal end of an expansion rod 6 and an upper surface side of the opening/closing arms 11, 12 are connected together by an opening/closing operating section 10C, and a linear motion of the expansion rod 6 is converted into a swingable rotating motion via two swingable opening/closing rods 22, 23 arranged on the opening/closing operating section 10C, to thereby transmit the converted swingable rotating motion to a horizontal opening/closing force to the opening/closing arms 11, 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a front attachment for exchanging a bucket attached as a front attachment to an excavator excavator such as a power excavator and cutting or grasping an object, for example, cutting or pulling up an upright tree or the like The present invention relates to an attachment for cutting or grasping an excavator excavator suitable for performing a felling operation or the like.

  In an excavator excavator, for example, a boom part is turnably attached to a traveling vehicle such as a power shovel car, and the boom part 1 includes an arm 2, a hydraulic cylinder (bucket cylinder) 3 and a link as shown in FIG. The mechanism 4 is configured to connect the tip of the arm 2 to the bucket 5, and the hydraulic cylinder 3 connects the tip of the telescopic rod 6 to the tip of the arm 2 and the bucket 5 via the link mechanism 4.

  The link mechanism 4 includes a link member 7 that connects the distal end of the telescopic rod 6 to the distal end side of the arm 2 and a link member 8 that couples the distal end of the telescopic rod 6 to the bucket 5. P4 is connected to form a parallel link type, and excavation work is performed by swinging and rotating the bucket 5 backhoe type by the expansion and contraction operation of the hydraulic cylinder 3. Reference numeral 9 denotes a mounting bracket provided on the arm 2, which may be used depending on the structure of the bucket 5.

  In addition, the bucket is used by exchanging with other front attachments depending on the work contents.For example, when cutting wood or rebar in dismantling work, etc., use a cutter for cutting work, and use cut wood or rebar. A fork claw for gripping work is used for picking up, an earth drill for drilling work is used for drilling rocks and the like, and a crusher for crushing work is used for crushing blocks such as rocks.

  In this way, using various front attachments compatible with buckets and performing multiple different operations with one excavator excavator, it is necessary to prepare multiple excavator excavators equipped with dedicated attachments Therefore, the equipment cost can be reduced and it is effective especially in the case of a work site where the work space is narrow. In this case, the structure of the attachment for replacement is simple and the replacement work can be easily performed. It is desirable that

  Among the various front attachments that are compatible with these buckets, the above-mentioned cutting work cutter and gripping fork claw function can be combined to cut upright trees, etc. As a proposal of the front attachment which performs logging work, there exist prior art currently disclosed by patent documents 1-4, for example.

Japanese Patent Publication No. 7-08165 Japanese Patent Laid-Open No. 7-147850 JP-A-8-228615 JP 2000-69866 A

  However, in the case of the prior art including these patent documents, a hydraulic cylinder for opening and closing is built in the cutting or gripping attachment separately from the hydraulic cylinder (bucket cylinder) attached to the boom portion. A pair of open / close arms provided with cutting blades are opened / closed by an expansion / contraction operation of an open / close hydraulic cylinder, and cutting operations such as cutting upright trees, etc., and pulling them out are performed.

  In this way, if the structure for incorporating the hydraulic cylinder for opening and closing is included in the attachment for cutting or gripping, the hydraulic pipe connected to the hydraulic pipe of the boom part is required without simply adding the hydraulic cylinder. In addition to increasing the manufacturing cost, the connected hydraulic piping may interfere with cutting or gripping work, may cause a failure, reduce the durability life, and increase the number of maintenance. .

  Further, in the prior art, a boom part mounted on the main body side of the excavator excavator is used, and in particular, a cutting or gripping attachment that operates the open / close arm with a hydraulic cylinder (bucket cylinder) mounted on the boom part is configured. In this case, because the bucket swings and rotates around the horizontal axis with the horizontal axis as a fulcrum, the open / close arm is configured to open and close on the vertical plane, so it can cut or hold upright trees, etc. It was difficult to perform logging operations such as pulling out.

  Therefore, the present invention provides an attachment for cutting or grasping an excavator excavator that can solve the problems of the prior art, and in particular, an attachment using a hydraulic cylinder (bucket cylinder) mounted on a boom portion. A pair of open / close arms mounted therein can be opened and closed on a horizontal plane or along an inclined surface having a depression angle or an elevation angle with respect to the horizontal plane to solve the above-described problems in the prior art.

  The excavator excavator cutting or gripping attachment according to the present invention includes a fixed support portion, an opening / closing portion and an opening / closing operation portion, and includes a distal end side of an arm mounted on a main body side of the excavator excavator and a distal end of a telescopic rod of a hydraulic cylinder. The base part of the fixed support part is connected to and supported by the boom end connected to the boom part by a link member, and a pair of open / close arms provided in the open / close part are provided on the front end side of the fixed support part. The open / close operation is provided on the open / close operation unit by connecting the link member at the tip of the telescopic rod and the upper surface side of each open / close arm with an open / close operation unit. The linear motion of the telescopic rod is converted into a swinging rotational motion via the rod and transmitted to the open / close arm as a horizontal open / close force. (Claim 1)

  Also, between the arm of the boom part and the fixed support part of the attachment, the connecting length is changed to change the angle of inclination of the arm with respect to the fixed support part, and the fixed support part and the opening / closing part are raised and lowered, or the depression angle or It is possible to adopt a form in which posture control means for controlling the posture in an elevation angle is provided. (Claim 2)

  The excavator excavator cutting or gripping attachment according to the present invention is operated by the boom unit in a state in which the bucket that is standard equipment on the excavator excavator is removed and replaced. When the hydraulic cylinder (bucket cylinder) mounted on the cylinder is expanded and contracted, the expansion and contraction operation is horizontally performed with respect to the pair of open / close arms provided on the open / close section via the open / close operation section mounted on the cutting or gripping attachment. Is transmitted as the opening and closing force.

  Therefore, using a hydraulic cylinder (bucket cylinder) attached to the boom part, it is possible to open and close the pair of opening and closing arms attached in the attachment along the horizontal plane. Since the hydraulic cylinder and hydraulic piping can be omitted, the structure of the attachment can be manufactured easily and inexpensively, and the hydraulic piping, which was a problem of the prior art, obstructs the cutting or gripping work, or malfunctions. As a cause of this, it is possible to solve the problem of decreasing the durability life and increasing the number of maintenance.

  In addition, the attachment structure of the bucket and the attachment for cutting or gripping is compatible with the boom part, facilitating replacement work, so it is possible to prepare the attachment for cutting or gripping beforehand and perform the replacement work at the work site. Do multiple operations using a single excavator excavator such as a power shovel, such as excavation work with a bucket and cutting work such as a tree with a cutting attachment or pulling out a tree with a gripping attachment. Therefore, the equipment cost can be reduced and the work can be efficiently performed even in a narrow work site.

  Furthermore, when connecting means for posture control is provided between the arm of the boom part and the fixed support part of the attachment as in claim 2 and the fixed support part and the opening / closing part are raised and lowered to control the posture in a depression angle or an elevation angle form, For example, it is possible to easily cut and pull out trees on sloping ground, etc.Especially in the case of attachments for gripping, if a hydraulic cylinder is attached as a connecting means for posture control, the trees are gripped and lever-type When activated, it can be easily pulled out.

  The attachment for cutting or gripping the excavator excavator of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 2 to 6 showing an embodiment in which the present invention is applied to a cutter unit 10 which is a cutting attachment. 6 is a hydraulic cylinder (bucket cylinder) mounted on the boom unit 1 by mounting the cutter unit 10 to which the present invention is applied instead of the bucket 5 on the boom unit 1 mounted on the main body side of the excavator excavator. FIG. 5 is an embodiment diagram in which the cutter is opened and closed along a substantially horizontal plane.

  In each drawing, FIG. 2 shows a side view in which the cutter unit 10 is mounted on the tip side of the boom portion 1, and FIGS. 3 (a), (b), and (c) are viewed from arrow directions a, b, and c in FIG. FIG. 4 is an exploded perspective view of FIG. 3 (a), and FIGS. 5 and 6 are explanatory views of the operating state. In these drawings, the main body side of the excavator excavator is shown. The boom part 1 attached to the same will be described by attaching the same reference numerals to the members common to FIG.

  The cutter unit 10 includes a fixed support portion 10A connected to the arm 2 side of the boom portion 1, an opening / closing portion 10B attached to the distal end side of the fixed support portion 10A, and an opening / closing portion of the boom 1 at the telescopic rod 6 side of the hydraulic cylinder 3. When the telescopic rod 6 of the hydraulic cylinder 3 is telescopically operated, the open / close operating unit 10C is attached to the open / close unit 10B pivotally attached to the distal end side of the fixed support unit 10A. The structure is converted into a horizontal opening / closing force via an opening / closing operation rod and opens / closes the opening / closing arms 11, 12 provided in the opening / closing portion 10B along a substantially horizontal plane.

  The cutter unit 10 is provided with an open / close portion 10B in which open / close arms 11 and 12 having cutting blades 11a and 12a attached to the inner surface thereof are arranged in a left-right opposed manner, and the base side of the open / close arms 11 and 12 is supported vertically. The open / close arms 11 and 12 are supported in an openable and closable manner by the fixed support portion 10A, which is sandwiched between the support plates 13 and 14 and connected between the support plates 13 and 14 by a pivot shaft P5. Connection brackets 15 and 16 are provided on the upper surfaces of the open / close arms 11 and 12, and the support plates 13 and 14 are connected by a fixed shaft S <b> 1 through a spacer member 17 between the middle and the rear end side.

  The support plate 13 is provided with connecting plates 18 and 19 erected from the plate surface in parallel, and between the connecting plates 18 and 19, the distal ends of the arm 2 and the support rod 20 through pivot shafts P 6 and P 7. And the base end of the support rod 20 is connected to the mounting bracket 9 via a pivot shaft P8, and between the distal end side of the arm 2 and the distal end of the telescopic rod 6 of the hydraulic cylinder 3. The link member 7 is erected in a front-rear facing manner and connected by pivot shafts P9 and P10.

  The support rod 20 fixes the arm 2 to the fixed support portion 10A at a predetermined inclination angle, and in the illustrated embodiment, the cutter unit 10 so that the fixed support portion 10A and the opening / closing portion 10B are substantially horizontal. However, by changing the length of the support rod 20, the posture is changed so as to have an inclined surface (an opening / closing portion 10B side is inclined downward) or an elevation angle (the opening / closing portion 10B side is inclined upward). It is possible.

  For example, as shown in the illustrated embodiment, a plurality of mounting holes 20 to 20c are provided at predetermined intervals with respect to the support rod 20, and one of these mounting holes 20 to 20c is selected and the mounting bracket 9 is mounted on the pivot shaft P8. When the length of the support rod 20 is increased, the support rod 20 rotates about the pivot shaft P6 with respect to the rear end side of the fixed support portion 10A, and the front end side of the fixed support portion 10A and the opening / closing portion 10B are When the length of the support rod 20 is shortened, the distal end side of the fixed support portion 10A and the opening / closing portion 10B are inclined downward.

  Also, a plurality of fixed-length support rods 20 having different lengths are prepared, and the posture is changed by changing the shape, or the posture is changed continuously using a hydraulic cylinder instead of the support rod 20. For example, it can be used when cutting a tree on an inclined land. However, as another form when it is not necessary to change the posture, the mounting bracket 9 and the support rod 20 are omitted, and the pivot shaft A link member may be installed and connected between P9 and the pivot shaft P6 or pivot shaft P7.

  The opening / closing operation unit 10C extends and retracts the expansion / contraction rod 6 of the hydraulic cylinder 3 attached to the boom unit 1 so that the linear movement caused by the expansion / contraction operation is performed on the pair of opening / closing arms 11 provided on the opening / closing unit 10B of the cutter unit 10. 12 is a power conversion mechanism for converting into a swinging rotary motion and transmitting it as a horizontal opening / closing force, wherein the base end portions of the opening / closing operation rods 22 and 23 are the distal ends of the telescopic rods 6 on the boom portion 1 side. The front and rear operation rods 22 and 23 are connected to the connection brackets 15 and 16 of the opening and closing portion 10B, while being connected to the side in a swingable and rotatable manner along the vertical surface and the inclined surface of the depression angle. On the other hand, they are connected so as to be able to swing and rotate along the vertical plane and the inclined surface of the elevation angle.

  In the illustrated embodiment, as shown in detail in the exploded perspective view of FIG. 4, the connection support plate 21 is attached to the distal end side of the telescopic rod 6 in a manner of being wound around the pivot shaft 10 of the link member 7 around the boom portion 1. The base end portions of the opening / closing operation rods 22, 23 are connected to the connection support plate 21 via the pivoting shafts P11, P12, and the pivoting shafts P13, P14 are connected to the distal ends of the opening / closing operation rods 22, 23, respectively. The connection support plates 24 and 25 are attached via the joints, and the connection support plates 24 and 25 are connected to the connection brackets 15 and 16 of the open / close arms 11 and 12 via the pivot shafts P15 and P16.

  Thus, the open / close operation rods 22 and 23 are configured to freely swing and rotate in response to the expansion / contraction operation of the expansion / contraction rod 6, and when the expansion / contraction rod 6 expands / contracts, the front end side is expanded downward in advance. When being transmitted to the open / close arms 11 and 12 via the open / close operation rod rods 22 and 23 arranged in the shape of a letter C with respect to the horizontal plane or the horizontal plane with the pivot shaft P5 as a fulcrum, Therefore, the open / close arms 11 and 12 can be opened and closed along a substantially horizontal plane.

  That is, when the telescopic rod 6 of the hydraulic cylinder 3 is actuated in the direction F1a as shown in FIG. 5, the link member 7 rotates in the clockwise direction F2a with the pivot shaft P9 as a fulcrum, so that the tip side is The opening / closing operation rod rods 22 and 23 pivotally attached to the connection brackets 15 and 16 via the connection support plates 24 and 25 have forces in the direction F3a for increasing the inclination angle and the direction F4a for pulling them toward the hydraulic cylinder 3 side. Will work.

  As a result, a traction force in the horizontal direction F5a acts on the opening / closing operation rod rods 22 and 23, which are arranged in a letter C shape with the tip side expanded in diameter downward in advance, and this traction force As a result, a force in the opening direction F6a is applied to the open / close arms 11 and 12 with the pivot shaft P5 as a fulcrum, and the open / close operation rod rods 22 and 23 support the pivot shaft P10 and the pivot shaft P11 or the pivot shaft P12. Since the tip end side swings, each of the open / close arms 11 and 12 can be fully opened as shown in FIG.

  As shown in FIG. 6, when the telescopic rod 6 of the hydraulic cylinder 3 is operated in the direction F1b, the link member 7 rotates in the counterclockwise direction F2b with the pivot shaft P9 as a fulcrum. The opening / closing operation rod rods 22 and 23 whose sides are pivotally attached to the connecting brackets 15 and 16 via the connecting support plates 24 and 25 are pushed to the opposite side of the direction F3b and the hydraulic cylinder 3 to reduce the inclination angle. The force of F4b will act.

  As a result, a pressing force in the horizontal direction F5b acts on the front end side of each open / close operation rod rod 22, 23 that is arranged in a letter C shape with the front end side enlarged in diameter downward. A force in the closing direction F6b with the pivot shaft P5 as a fulcrum acts on the open / close arms 11 and 12 by the pressing force, and the open / close operation rod rods 22 and 23 have the pivot shaft P10 and the pivot shaft P11 or the pivot shaft P12. Since the tip side is swung around the fulcrum, the open / close arms 11 and 12 can be fully closed as shown in FIG.

  Therefore, the bucket mounted on the boom portion 1 of the excavator excavator such as a power shovel is replaced with the cutter unit 10, and the telescopic rod 6 of the hydraulic cylinder 3 mounted on the boom portion 1 side as a bucket cylinder is used. By extending and contracting, the open / close arms 11 and 12 can be opened and closed along a substantially horizontal plane via the open / close operation rod rods 22 and 23, and trees can be easily cut.

  In particular, it is not necessary to provide an opening / closing cylinder separately from the bucket cylinder as in the prior art of patent documents and the like, and for the opening / closing cylinder, a hydraulic pipe is connected from the boom unit 1 side to the cutter unit 10 side. Therefore, the omission of the structure of the cutter unit 10 can be simplified and can be manufactured at a low cost, and the hydraulic piping, which has been another problem, obstructs the cutting or gripping work, or can As a factor, it is possible to solve the problem of decreasing the durability life and increasing the number of maintenance.

  Further, when the bucket 5 is replaced with the cutter unit 10, the pivot shaft P2 in FIG. 1 is pulled out, the link members 7 and 8 are removed, the link member 7 is reattached to the alternative pivot shaft P10, and connection support is provided. The base end side of the open / close operation rod rods 22 and 23 is connected via the plate 21, the pivot shaft P3 is pulled out, the bucket 5 is removed, and the alternate pivot shaft P6 is coupled to the coupling plates 18 and 19, and attached. The support rod 20 is connected between the brackets 9 and 9 and the connecting plates 18 and 19 by pivot shafts P7 and P8.

  Therefore, if the cutter unit 10 is prepared in advance, it is possible to easily perform the replacement work at the work site, whereby both excavation work by the bucket 5 and cutting work by the cutter unit 10 can be performed with a single power unit. Since it can be performed using an excavator excavator such as a shovel car, the equipment cost can be reduced and the work can be efficiently performed even in a narrow work site.

  In the illustrated embodiment, the cutter unit 10 for cutting a tree or the like has been described. However, the present invention can be applied to a gripping attachment that can be used when a tree is gripped and pulled out. For example, a structure in which the cutting blades 11a and 12a attached to the open / close arms 11 and 12 are simply removed, or a structure in which a gripping piece suitable for gripping instead of the cutting blades 11a and 12a is mounted can be adopted.

  When applied to a gripping attachment, the telescopic rod 6 of the hydraulic cylinder 3 is contracted and the roots of the trees are gripped by the open / close arms 11 and 12, and then attached to the main body side of a shovel excavator such as a shovel car. It is possible to pull out a tree or the like in a cocoon manner by operating a boom cylinder or the like and lifting the rear end side of the cutter unit 10.

  In addition, when a hydraulic cylinder is mounted instead of the support rod 20 in the illustrated embodiment, the posture of the cutter unit 10 is continuously maintained at a desired angle in a horizontal, depression or elevation angle by extending and contracting the telescopic rod of the hydraulic cylinder. For example, it can be used when cutting or grasping trees on slopes, and when the telescopic rod of the hydraulic cylinder is expanded and contracted while holding the trees, Etc. can be easily pulled out.

  The present invention is not limited to the embodiment shown in the drawings, and various modifications can be made within the scope of the gist of the invention. For example, the opening / closing operation unit 10 </ b> C is formed of the telescopic rod 6 provided on the boom unit 1 side. As long as it is a mechanism that can convert the linear motion into a swinging rotary motion and transmit it to the open / close arms 11 and 12 of the cutter unit 10 as a horizontal open / close force, it can be replaced with another known power conversion mechanism. Is also possible.

  In the illustrated embodiment, both the pair of open / close arms 11 and 12 are moved to perform the open / close operation. However, one of them is a movable arm and the other is a fixed arm. It is also possible to adopt a form in which the movable arm is opened and closed by connecting the opening and closing operation rod to the movable arm side and operating the opening and closing operation rod with the telescopic rod of the hydraulic cylinder.

  Further, the arm 2 on the boom 1 side is connected to and supported by the fixed support portion 10A, and the support rod 20 provided as connection means for posture control in order to change the posture of the cutter unit 10 is, for example, a turnbuckle. Thus, it is possible to adopt a form that is replaced with various known forms that function in the same manner, such as other means whose length can be varied.

It is explanatory drawing of the operation state of the bucket with which the boom part was mounted | worn as a front attachment with the shovel type excavator which is the implementation object of this invention. It is embodiment which applied this invention to the cutter unit which is a cutting attachment, Comprising: It is the side view which mounted | wore the cutter unit with the front end side of the boom part. It is the fragmentary top view in the cutter unit of FIG. 2, (a) is the fragmentary top view seen from the arrow direction a side, (b) is the fragmentary top view seen from the arrow direction b side, (b) is the arrow Partial plan views viewed from the direction b side are respectively shown. The partial top view of Fig.3 (a) is shown with an exploded perspective view. It is explanatory drawing of the operation state which opened each opening-and-closing arm in the cutter unit of FIG. 2, (a) is a side view, (b) is shown with a top view. It is explanatory drawing of the operation state which made each opening-and-closing arm in the cutter unit of FIG. 2 fully closed, Comprising: (a) is a side view, (b) is shown with a top view.

Explanation of symbols

1 Boom (excavator excavator)
2 Arm 3 Hydraulic cylinder (cylinder for bucket)
4 Link mechanism 5 Bucket (Excavation attachment)
6 Telescopic rod (hydraulic cylinder)
7, 8 Link member 9 Mounting bracket 10 Cutter unit (cutting attachment)
DESCRIPTION OF SYMBOLS 10A Fixed support part 10B Open / close part 10C Open / close operation part 11, 12 Open / close arm 11a, 12a Cutting blade 13, 14 Support plate 15, 16 Connection bracket 17 Spacer member 18, 19 Connection plate 20 Support rod 21, 24, 25 Connection Support plates 22, 23 Opening and closing operation rods F1 to F6 Moving directions P1 to P16 Pivoting shaft S1 Fixed shaft

Claims (2)

  The arm of the boom part is composed of a fixed support part, an opening / closing part and an opening / closing operation part, and the boom part arm is connected to the boom part where the distal end side of the arm attached to the main body side of the excavator excavator and the distal end of the expansion rod of the hydraulic cylinder are connected by a link member. The base end side of the fixed support portion is connected to and supported at the tip end, and a pair of open / close arms provided on the open / close portion are connected to the front end side of the fixed support portion so as to be openable and closable along a substantially horizontal plane, and the telescopic rod The link member at the tip and the upper surface side of each open / close arm are connected by an open / close operation unit, and the linear motion of the telescopic rod is changed into a swinging / rotating motion via a swingable open / close operation rod provided in the open / close operation unit. An excavator excavator cutting or gripping attachment that is converted and transmitted to an open / close arm as a horizontal opening / closing force.   Between the arm of the boom part and the fixed support part of the attachment, the connecting link length is changed to change the inclination angle of the arm with respect to the fixed support part, and the fixed support part and the opening / closing part are raised and lowered to form a depression or elevation angle. The excavator excavator cutting or gripping attachment according to claim 1, further comprising a posture control connecting means for controlling the posture.

Images