JP2008188769A - Cutter and work vehicle loaded with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the work region of a cutter used heretofore is narrow and, in the case where a cutting target is cut, for example, in a horizontal direction, a back hoe itself must be moved once, and that the vibration received from a road surface by the back hoe is transmitted to the cutter to make accurate cutting work unexecutable. <P>SOLUTION: The work region of the cutter is widened by enhancing the degree of freedom of the cutter. The cutter is constituted of the base part 11 supported on the leading end of an arm part in a rotatable manner, the moving part 12 formed on the upper part of the base part 11, the rotary cutter mounting part 13 supported on the base part 11 in a revolvable manner and a rotary cutter 14 for cutting the cutting target. The base part 11 is supported on the leading end of an arm 10 so as to be rotatable in an XZ plane and an XY plane. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutting device mounted on the tip of an arm such as a backhoe, and a work vehicle equipped with these devices.

  Conventionally, as a cutting device attached to an arm tip such as a backhoe, a cutting device shown in Patent Document 1 is known.

JP 2000-108118 A

  Specifically, in Patent Document 1, as shown in FIG. 8, a base 51 joined to a tip of an arm 50 with a pin, a rotary cutter attachment 52 that is freely rotatable with respect to the base 51, and a rotary cutter attachment A cutting device constituted by a disc-shaped rotating cutter 53 attached to 52 is disclosed. In addition, a two-angle setting plate having a predetermined shape is formed on the connecting portion 51 a of the base 51 and the rotary cutter attaching portion 52. The two angle setting plates are each provided with a clutch portion formed of a concave portion and a convex portion on the surface of the disk-shaped member and radially formed from the center of the disk. By rotating these angle setting plates, the rotating cutter mounting portion 52 rotates around the X axis, and the rotating cutter mounting portion 52 is fixed by engaging the concave and convex portions of the two angle setting plates. . Further, the rotary cutter attaching part 52 has a built-in moving part that moves the rotary cutter 53 attached to the rotary cutter attaching part 52 in the X-axis direction. The moving part is constituted by a hydraulic pump, and the rotary cutter 53 is moved in the X-axis direction by changing the volume of the hydraulic pump.

  By the way, for example, a cutting device attached to the tip of an arm such as a backhoe is used to cut concrete or the like to be cut, but when cutting the concrete wall to be cut, first rotate to the concrete wall. After pressing the cutter 53 and cutting by a predetermined method, the rotary cutter 53 is separated from the concrete wall while combining the operations of the arm 50, the arm 50 and the pin joint portion of the base 51. Thereafter, similarly, the rotary cutter 53 is pressed against another portion that requires cutting while combining the operations of the arm 50 and the arm 50 and the pin joint portion of the base 51. Further, when the concrete wall is cut in the horizontal direction, the rotary cutter 53 is rotated in parallel using an angle setting plate and fixed. Thereafter, the concrete wall can be cut by pressing against a portion requiring cutting and rotating the rotary cutter 53. However, when a concrete wall is cut to a predetermined length in the horizontal direction using such a cutting device, the rotary cutter 53 is rotated while the backhoe itself is moved after the rotary cutter 53 is inserted into the concrete wall. Cut the wall horizontally. At this time, since the backhoe vibrates due to the influence of the road surface, the vibration is transmitted to the rotary cutter 53, and the cut surface does not become flat. This is because the movable area of the arm is limited.

  Accordingly, the present invention has been made in view of such a situation, and a cutting apparatus capable of increasing the degree of freedom by widening the movable region of the cutting apparatus and accurately performing vertical cutting and horizontal cutting. The purpose is to provide.

  Accordingly, a cutting device according to the present invention is a cutting device formed at the tip of an arm having a first plane as a movable range, and is pivotally supported at the tip of the arm so as to rotate within the first plane. A movable base that is formed on the base and moves in one direction with respect to the base; a cutter attachment that is pivotally supported by the movement; and a rotary cutter attached to the cutter attachment The base portion is further supported so as to rotate in a second plane different from the first plane.

  According to this configuration, the cutting device can be moved in the first plane by the arm, and can be made a movable region in the second plane perpendicular to the first plane by the base supported by the arm. . That is, two different planes can be used as a movable region, and a three-dimensional space can be used as a working region by combining the operation in the first plane and the operation in the second plane.

  Further, the second plane is characterized in that one of its axes is an arbitrary plane parallel to the normal line of the first plane. According to this configuration, since the first plane and the second plane form a right angle, the cutting apparatus that uses the movable area in these two planes can use a wide space as a work area.

  Furthermore, the base portion is formed in a substantially quadrangular prism shape, and includes a guide rail that guides the moving portion in one direction at an upper portion. That is, the arm can be stabilized by pressing the lower surface of the base against the cutting object, the rotating cutter can be brought close to the cutting object by rotating the cutter mounting portion, and the cutting object can be accurately cut by rotating the rotating cutter. .

  Since the cutting device having the above-described configuration has a wider movable area than a conventional cutting device, the cutting device can be widened to increase the degree of freedom, and the vertical cutting and horizontal direction can be performed only by the operation of the arm. Can be accurately cut.

  Hereinafter, a cutting device according to the present invention and an embodiment of a backhoe equipped with the cutting device will be described in detail. The cutting device is formed at the tip of an arm of a working vehicle such as a backhoe, and is operated by a user. The cutting device has a substantially disk-shaped cutter, and rotates the disk with a predetermined power to cut a structure or the like. The cutting device according to the present invention can be attached to the tip of the boom and the arm and the boom used conventionally, because the degree of freedom has increased as compared with the conventionally used cutting device, The cutting operation can be performed without depending on the operation of the track frame. For convenience of explanation, detailed explanation will be given using XYZ orthogonal coordinate axes shown in each drawing. Further, for convenience of explanation, the operation of each part will be described in detail assuming that the cutting device is in the state shown in FIG.

  As shown in FIGS. 1 and 2a, the cutting device according to the embodiment is mounted on, for example, an arm portion 10 of a backhoe on which the cutting device is mounted. That is, it can be easily attached to a conventional arm portion. Specifically, the cutting device includes a base 11 that is pivotally supported at the tip of the arm portion, a moving portion 12 that is formed at the top of the base 11, and a rotary cutter that is pivotally supported by the base 11. It is comprised by the part 13 and the rotary cutter 14 which cut | disconnects a cutting target object.

  The arm unit 10 is operated by a user using an operation unit (described later) provided on the backhoe. In the present embodiment, a detailed description will be given using the arm 10a having the boom 10b pin-connected to the tip of the arm 10a. One end of the arm 10a is joined to a revolving frame (not shown) of the backhoe so as to have a predetermined movable region. Furthermore, the other end of the arm 10a is pin-joined at the boom 10b and the joint 10c, and a predetermined operation is performed using the hydraulic cylinder 10d with the pin joint as a fulcrum. At this time, the arm 10a and the boom 10b use the XZ plane as the first plane as a movable region.

  At the tip of the boom 10b, a turning portion 15 that turns the base portion 11 in the XY plane is formed. The rotation part 15 is comprised by the hydraulic motor 15a and the housing member 15b inside. The hydraulic motor 15a is disposed inside the drive unit 15 so that the drive shaft is parallel to the Z axis, for example. Such a hydraulic motor 15a may be a hydraulic motor using any one of a fixed swash plate type, a rotary swash plate type, and a swash shaft type. The hydraulic motor 15a is driven using a hydraulic pump described later, and the base 11 is rotated in the XY plane as the second plane.

  Further, as shown in FIG. 2, the arm 10 is formed with a piston 10e substantially parallel to the boom 10b. Specifically, one end of the hydraulic piston 10 e is pin-joined in the vicinity of the joint between the arm 10 a and the boom 10 b, and the other end of the hydraulic piston 10 e is pin-joined to the rotating portion 15. Further, the tip of the boom 10b and the rotating part 15 are pin-joined. Such a hydraulic piston 10e is driven using a hydraulic pump, which will be described later, and can rotate the base 11 in the XZ plane.

  As described above, the base 11 is a substantially quadrangular prism-shaped member having a movable region in the XY plane by a hydraulic motor, and a fixed portion 16 and a guide rail 17 are formed on the upper portion. The fixed portion 16 is rigidly joined to the base portion 11 and rotates in the XY plane in synchronization with the base portion 11 by the driving force transmitted from the hydraulic motor 15a. Furthermore, one end of a hydraulic cylinder 18 that moves the moving unit 12 is fixed to the side surface of the fixed unit 16. FIG. 3 is a cross-sectional view of the AA ′ cross section, but the guide rail 17 has, for example, a substantially T-shaped cross section, and is wound by a raised portion 12a formed in the moving portion 12 as shown in FIG. The moving part 12 is disposed on the side. By forming the guide rail 17 and the raised portion 12a in this manner, the moving portion 12 is movable only in the X-axis direction. Further, any method may be used as long as the moving unit 12 can move on the guide rail 17 only in the X-axis direction. The hydraulic cylinder 18 has one end fixed to the fixed portion 16 and the other end fixed to the moving portion 12, and is connected to a hydraulic pump, which will be described later, and expands and contracts in the X-axis direction by user control. 12 is moved in the X-axis direction by the method described above.

  The moving part 12 is a member that can be moved in the X-axis direction on the base part 11 by the hydraulic cylinder 18 as described above, and a cutter mounting part 13 is pivotally supported by pin joining in the vicinity of the upper part of such a moving part 12. Has been. Further, the above-described raised portion 12 a is formed below the moving portion 12. Further, one end of a hydraulic cylinder 19 is pivotally supported by the moving part 12, and the other end is pivotally supported by its own upper part by expanding and contracting the hydraulic cylinder 19 that is pivotally supported by the cutter mounting part 13. The cutter attachment portion 13 is rotated.

  The cutter attaching part 13 is formed by a rod-shaped member, one end is pin-joined to the moving part 12, and the rotary cutter 14 and the hydraulic motor 14a are formed at the other end. In addition, the other end of the hydraulic cylinder 19 is rotatably supported near the center of the cutter mounting portion 13. Such a cutter attachment portion 13 is configured such that the hydraulic cylinder 19 expands and contracts, so that the joint portion between the moving portion 12 and the hydraulic cylinder 19, the joint portion between the cutter attachment portion 13 and the hydraulic cylinder 19, and the movement portion 12 and the cutter attachment portion 13. The pin attachment portion is rotated to move the cutter attachment portion 13 on the XZ plane. Specifically, an arc centering on the pin attachment portion of the moving portion 12 and the cutter attachment portion 13 is drawn. Move.

  The rotary cutter 14 is formed in a substantially disk shape, and the tooth-like portion is formed using, for example, diamond. The hydraulic motor 14a is connected via a later-described hydraulic pump and a hydraulic pressure adjusting valve. The hydraulic motor 14a generates a driving force around the Y-axis by the user's control and is fixed to the hydraulic motor 14a. 14 is rotated around the Y axis.

  FIG. 4 is a diagram illustrating a configuration of a control system of a backhoe equipped with the cutting device according to the embodiment, and an operation unit 31 on which a user operates the backhoe, and control of each unit based on a command from the operation unit 31 And a control unit 32 for performing the above.

  The control unit 32 includes a base control unit 32a that controls the hydraulic motor 15a for rotating the base 11 in the XY plane based on a command from the operation unit 31 by the user, and a command from the operation unit 31 by the user. Based on a command from the operation unit 31 by the user, the hydraulic piston 18 for moving the moving unit 12 is controlled based on a command from the operation unit 31 by the user. A moving unit control unit 32c, a cutter mounting unit control unit 32d for controlling the hydraulic piston 19 for rotating the cutter mounting unit 13 based on a command from the operating unit 31 by the user, and a user operating unit 31 from the operating unit 31 And an arm control unit 32e that controls the hydraulic piston 10e for rotating the base 11 in the XZ plane based on the command. To have.

  The base control unit 32a operates the hydraulic motor 15a by a method described later by the user operating the operation unit 31, and performs control for rotating the base 11 in the XY plane. The rotary cutter control unit 32b operates the hydraulic motor 14a by a method described later by operating the operation unit 31 by the user, rotates the rotary cutter 14, and performs control for cutting the cutting target. The moving part control part 32c operates the hydraulic piston 18 by a method described later by operating the operation part 31 by the user, and performs control for moving the moving part 12 in the X-axis direction. The cutter attaching part control part 32d operates the hydraulic piston 19 by a method described later by the user operating the operating part 31, and the cutter attaching part 13 is centered on the pin joint part with the moving part 12 in the XZ plane. Control to rotate. The arm unit control unit 32e operates to operate the hydraulic piston 10e by a method described later when the user operates the operation unit 31, and performs control for rotating the base in the XZ plane.

  Further, the control unit 32 transmits, to the supply unit 33, a command to supply working oil to the hydraulic pistons 18 and 19 based on the operation of the operation unit 31. Here, the supply unit 33 includes a hydraulic adjustment valve 33a and a hydraulic pump 33b. The hydraulic pressure adjustment valve 33a is capable of adjusting the amount of hydraulic oil sent to each member of the hydraulic motors 14a, 15a and the hydraulic pistons 10e, 18, 19 based on a command from the control unit 32. The hydraulic pump 33b sucks hydraulic oil from an oil tank (not shown) and supplies the sucked hydraulic oil to the respective members of the hydraulic motors 14a and 15a and the hydraulic pistons 10e, 18, and 19 via a hydraulic adjustment valve. It is.

  When the user cuts the object to be cut, the following operation is performed using the operation unit 31 formed on the backhoe.

  That is, when the base 11 is rotated in the XY plane, the user transmits a predetermined command to the base control unit 32 a through the operation unit 31, and the base control unit 32 a that has received the command transmits the command to the oil supply unit 33. In addition to sending a command to supply a predetermined amount of hydraulic oil to the hydraulic motor 15a, the hydraulic motor 15a is operated. Further, at this time, the user controls the operation amount of the hydraulic motor 15a using the operation unit 31 and the base control unit 32a. By controlling the operation amount of the hydraulic motor 15a, the rotation amount of the base 11 that rotates in the XY plane can be controlled based on the power generated by the hydraulic motor 15a. When the hydraulic motor 14a is operated, the same operation is performed using the rotary cutter control unit 32b to operate the hydraulic motor 14a and rotate the rotary cutter 14.

  Further, when the moving unit 12 is moved in the X-axis direction, the user transmits a predetermined command to the moving unit control unit 32 c through the operation unit 31, and the moving unit control unit 32 a that has received the command transmits to the oil supply unit 33. On the other hand, a command for supplying a predetermined amount of hydraulic oil to the hydraulic piston 18 is transmitted, and the hydraulic piston 18 is expanded and contracted. At this time, the user controls the expansion / contraction amount of the hydraulic piston 18 by using the operation unit 31 and the moving unit control unit 32c. By controlling the operation amount of the hydraulic piston 18, the moving unit 12 is moved on the guide rail 17 in the X-axis direction based on the power generated by the hydraulic piston 18. When the hydraulic pistons 10e and 19 are operated, the same operation is performed using the arm part control unit 32e and the cutter attachment part control part 32d, and the hydraulic pistons 10e and 19 are expanded and contracted, and the base part 11 and the cutter attachment part are operated. 13 is rotated. The user performs a cutting operation by combining these operations.

  5A, 5B, and 5C are diagrams illustrating the operation of the cutting device. First, by actuating the hydraulic piston 10e, the base portion 11 is set up in the Z-axis direction, and the lower surface of the base portion 11 is pressed against the concrete wall T to be cut, for example. This state is referred to as state 1. At this time, the cutter attaching portion 13 is assumed to be separated from the concrete wall T in the X-axis direction. Next, by reducing the hydraulic piston 19, the cutter mounting portion 13 is rotated in the direction of arrow A, and the rotating cutter 14 is brought into contact with the concrete wall T. Next, a predetermined amount of cut is made in the concrete wall T by further reducing the hydraulic piston 19 while rotating the rotary cutter 14 by operating the hydraulic motor 14a. By moving the moving part 12 in the direction of arrow B while rotating the rotary cutter 14, a vertical cut can be formed in the concrete wall T.

  When the horizontal cut is made in the concrete wall T, as shown in FIGS. 6a and 6b, the base is rotated in the direction of arrow C on the YZ plane by operating the hydraulic motor 15a from the state 1 described above. When the base 11 rotates 90 degrees around the X axis, the operation of the hydraulic motor 15a is stopped. Next, by rotating the cutter mounting portion 13, the rotating cutter 14 is brought into contact with the concrete wall T, and the moving portion 12 is moved in the arrow D direction while rotating the rotating cutter 14 using the hydraulic motor 14 a. A horizontal cut can be formed in the wall T. This operation can be performed using the cutting device by the user performing the same operation through the operation unit 31 not only when cutting in the horizontal direction but also at an arbitrary angle desired by the user. .

  Further, when cutting different places, as shown in FIG. 6, the moving part 12 is moved in the direction of arrow C, the concrete wall T and the rotary cutter 14 are separated, and then the base part 11 is rotated in the direction of arrow D, and again The moving part 12 is moved in the direction of arrow E, and the cutting operation is performed by the same operation as described above while pressing the rotary cutter 14 against the concrete wall T. By such an operation, a portion to be cut can be changed without moving the backhoe body.

  As described above, by using the cutting device according to the present embodiment and the backhoe on which the cutting device is mounted, a higher degree of freedom can be realized than a conventionally used cutting device, and work efficiency can be improved. it can. Moreover, since it is not necessary to move a backhoe main body also when changing the location to cut | disconnect, a cutting | disconnection target object can be cut | disconnected correctly.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. For example, two rotating cutters may be provided as shown in FIG. The second rotary cutter 14 b has the same rotation axis as that of the rotary cutter 14, and is formed via the rotary cutter 14 and the cutter attachment portion 13. The rotary cutter 14b may be rotated by a hydraulic motor 14a, or a hydraulic motor different from the hydraulic motor 14a may be further provided between the rotary cutter 14b and the cutter mounting portion 13. . In a cutting device having a single rotary cutter 14, for example, when trying to cut near the intersection of two vertical walls, the thickness of the cutter mounting part 13 and the hydraulic motor 14a will cause the user to cut the part. In some cases, the rotary cutter 14 could not be brought close to, but by further providing the rotary cutter 14b, even in such a case, the cutting work can be performed without obstructing the wall.

It is a principal part perspective view explaining the structure of the arm part of the cutting device shown as embodiment. It is a principal part side view explaining the structure of the arm part of the cutting device. It is principal part sectional drawing of the AA 'cross section of the arm part of the cutting device, and is a figure for explaining operation which a moving part moves on a guide rail. It is a block diagram explaining the structure of the backhoe carrying the cutting device, and is a figure for demonstrating the method of controlling operation | movement of an arm part. It is a principal part side view of the same cutting device, and is a figure for explaining operation of each part at the time of performing cutting work. It is a principal part front view of the same cutting device, and is a figure for explaining operation of each part at the time of performing cutting work. It is a principal part side view of the same cutting device, and is a figure for explaining operation of each part at the time of performing cutting work. It is a principal part front view of the cutting device, and is a figure for explaining operation of each part at the time of changing a cutting part. It is a principal part front view of the cutting device, and is a figure for explaining operation of each part at the time of changing a cutting part. It is a principal part perspective view which shows the modification of a cutting device. It is a principal part perspective view of the conventional cutting device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Arm 10e Hydraulic piston 11 Base 12 Moving part 13 Cutter attachment part 14 Rotating cutter 14a Hydraulic motor 15a Hydraulic motor 17 Guide rail 18 Hydraulic piston 19 Hydraulic piston

Claims (8)

In a cutting device formed at the tip of an arm having a first plane as a movable range,
A base that is pivotally supported at the tip of the arm so as to rotate within the first plane;
A moving part formed on the base and moving in one direction relative to the base;
A cutter mounting portion rotatably supported by the moving portion;
A rotating cutter attached to the cutter attaching portion,
The cutting device according to claim 1, wherein the base is further supported to rotate in a second plane different from the first plane. The cutting apparatus according to claim 1, wherein the second plane is an arbitrary plane whose one axis is parallel to the normal line of the first plane. The cutting device according to claim 1, wherein the base portion is formed in a substantially quadrangular prism shape, and includes a guide rail that guides the moving portion in one direction on an upper surface. A hydraulic motor for generating a rotational force around a predetermined axis is provided at the tip of the arm,
The cutting device according to any one of claims 1 to 3, wherein the base is rotated in the second plane by a rotational force of the hydraulic motor. A hydraulic piston extending and contracting in one direction pivotally supported on the other end of the arm;
The other end of the hydraulic piston is pivotally supported at a position where the base can be pivoted in the first plane by expanding and contracting the hydraulic piston. Item 5. The cutting device according to any one of Items 4 to 4. The base includes a hydraulic cylinder that expands and contracts in one direction,
The cutting device according to any one of claims 1 to 5, wherein the moving unit is moved in one direction on the base by the hydraulic cylinder. In a work vehicle equipped with a predetermined construction machine,
A working vehicle comprising the cutting device according to claim 1. At least movement of the arm in the first plane and movement in the second plane, movement of the moving portion, rotation of the cutter mounting portion, rotation of the rotating cutter, and rotation of the base portion The working vehicle according to claim 7, further comprising: a control unit that controls the vehicle.