JP3566806B2 - Tool mounting device for work arm - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool mounting device used for mounting a tool or the like to a tip of a work arm used for work such as power distribution work.
[0002]
[Prior art]
For example, such a work arm is conventionally provided on a workbench of an aerial work vehicle, and is used at the tip of the work arm when performing work such as power distribution work at a high place. Attachment of tools was used as auxiliary means for work, and work efficiency was improved.
Such a working arm is generally composed of a plurality of arm members that are freely connected to each other so as to be able to freely expand, contract, extend and contract, and a base end portion is fixed to a work platform of an aerial work vehicle, and tools are attached to a distal end portion. It is configured to do work. In addition, it is configured so that the tip tools can be replaced according to the purpose of work.
[0003]
[Problems to be solved by the invention]
Here, in the conventional working arm, tools are fixedly attached to the tip of the arm. For this reason, when performing work using the work arm, even if the tip of the arm with the tool attached is moved to the work position, the tool attachment position is fixed with respect to the arm tip, and the orientation of the tool is There has been a problem that the direction of the object is displaced and the work is difficult to perform. For this reason, the mounting position of the tool at the tip end of the arm is reset, or the direction of each arm member constituting the arm is changed so that the tool is adjusted to a position where the tool can be easily used for the object. This necessitates a problem that the work efficiency is reduced.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of such an object, and has as its object to provide a tool mounting device for a working arm having a configuration in which a mounting direction of a tool attached to a distal end portion of the working arm can be easily adjusted. .
[0005]
Means and action for solving the problem
In order to achieve such an object, in the present invention, a main body member that is formed in a hollow shape extending in the longitudinal axis direction and forms the distal end of the working arm, and an orthogonal axis orthogonal to the longitudinal axis is provided on the main body member. A tool mounting member mounted to be tiltable about the center, an input transmission member rotatably disposed about the longitudinal axis in the main body member, and an input gear connected to the input transmission member and rotatable with the input transmission member And a pair of idle gears that are arranged on the orthogonal axis to face each other and can mesh with the input gear, and an output gear that is rotatably mounted on the tool mounting member and can mesh with both idle gears. Thus, a tool mounting device is configured. The output gear is connectable to a rotary drive shaft of a tool mounted on the tool mounting member, and at least one of meshing between the input gear and the idle gear and between the idle gear and the output gear is engaged.・ Can be removed.
[0006]
When the input gear is in the meshing position in the tool mounting device having such a configuration, when the input transmission member is rotationally driven by a hydraulic motor or the like built in the working arm, the input gear is rotated together therewith, and this rotation is performed. The output gear is transmitted to the output gear via the idle gear that meshes with the input gear, and the output gear is rotationally driven. Since the output gear is connected to a rotation drive shaft of the tool attached to the tool attachment member, the drive shaft of the tool is rotationally driven.
[0007]
On the other hand, when the input gear is at the position disengaged from the meshing position with the idle gear, or when the output gear is disengaged from the meshing position with the idle gear, the output gear can freely rotate and rotate the output gear. The tool mounting member freely held can be freely tilted about the orthogonal axis. Therefore, by tilting the tool mounting member in this state, the direction of the tool mounted on the tool mounting member can be adjusted.
[0008]
In addition, it is preferable that the input can be freely slid in the axial direction so that the engagement with the idle gear can be freely engaged and disengaged. In this case, the input gear is provided in the main body member to mesh with the input gear. It is preferable to provide an urging means for urging toward the position, and a release means which is attached to the main body member so as to be movable in the longitudinal axis direction and holds the input gear while being rotatable. With this configuration, the input gear is normally located at the meshing position and meshes with the idle gear due to the biasing force of the biasing means, so that the input transmission member is rotationally driven to drive the tool via the output gear. it can. Then, when the release means is forcibly moved in the longitudinal axis direction, the input gear can be moved to the disengagement position against the urging force of the urging means. Can be adjusted.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an aerial work vehicle 50 having the tool mounting device of the present invention. The aerial work vehicle 50 has a swivel 52 that is horizontally rotatable on a vehicle body 51, and a boom 53 that can freely move up and down and expands and contracts is mounted on the swivel 52. The work table 54 is mounted so as to be always kept horizontal by a leveling mechanism.
[0010]
An operator rides on the work table 54 to perform high-place work. A work arm (also referred to as an auxiliary arm) 10 for assisting this work is attached to the work table 54. As shown in detail in FIG. 3, the working arm 10 includes a support portion 11 disposed inside the worktable 54 so as to be sandwiched by the projection 55, and a support shaft 11a extending upward from the support portion 11. The first arm 12 is attached to the first arm 12 so as to be freely rotatable horizontally, the second arm 13 is composed of a balance arm attached to the tip of the first arm 12 so as to be able to undulate, and the tip of the second arm 13 is freely undulated. And a third arm 14 attached to the second arm. A hydraulic motor 15 is attached to the base of the third arm 14.
[0011]
The tool mounting device 20 according to the present invention is mounted on the tip of the third arm 14, and the tool 60 is mounted on the tool mounting device 20. The tool 60 includes a wire stripper, a wire holder, a wire cutter, and the like. FIG. 3 shows a state where the wire stripper is attached. In addition, these tools are detachable from the tool mounting device 20, and each tool is replaced and used according to work.
[0012]
In such an operation, the tool mounting device 20 supports the tool 60 so as to be able to tilt (in the direction of arrow A) and rotate (in the direction of arrow B) freely, thereby easily adjusting the direction of the tool 60. Workability.
[0013]
Such a tool mounting device 20 is shown in detail in FIG. 1, and the device 20 will be described with reference to FIG. The device 20 has a hollow cylindrical main body 21 which is connected to or integrally formed with the distal end of the third arm 14, and an input rotatably supported in the main body 21 by ball bearings 23a and 23b. A transmission member 22 is provided extending in the longitudinal axis direction. The input transmission member 22 is also a hollow cylindrical member, and a spline 22a is formed on the inner periphery of the base. The drive shaft 15a of the hydraulic motor 15 extending inside the third arm 14 is connected to the input transmission member 22 via the spline 22a. Connected.
[0014]
An input transmission shaft 24 inserted into the input transmission member 22 and protruding toward the distal end is connected to the input transmission member 22 by a pin 24a. A spline is formed on the outer periphery of the distal end side of the input transmission shaft 24, and an input bevel gear 25 is splined with the spline, and slidably mounted in the longitudinal axis direction. Therefore, the input bevel gear 25 can move on the input transmission shaft 24 in the longitudinal axis direction, and rotates integrally with the input transmission shaft 24.
[0015]
A tilting pin 31 extending in a direction perpendicular to the longitudinal axis and extending through the tip of the main body 21 is provided through the tilting pin 31. One right and left idle bevel gears 33 and 34 are rotatably disposed on the tilting pin 31. Is established. Further, a tool mounting member 30 is connected to the tilt pin 31. Here, the idle bevel gears 33 and 34 are rotatable around the distal end of the main body 21 via the ball bearings 32a and 32b. , Tilting pin 31) (tilting in the direction of arrow A in FIGS. 3 and 4).
[0016]
The tool attachment member 30 is a gate-shaped member as shown in FIG. 4, and is connected to the main body 21 via tilting pins 31 at both legs, and a cylindrical opening is formed through the middle portion. A tool connecting member 35 is rotatably disposed (rotated in the direction of arrow B) in the cylindrical opening. However, normally, the fixing bolt 39 provided on the side of the tool mounting member 30 contacts the outer peripheral surface of the tool connecting member 35, and the tool connecting member 35 is fixed and held. The tool connecting member 35 is a hollow cylindrical member, in which an output bevel gear 37 is rotatably disposed. The output bevel gear 37 meshes with the idle bevel gears 33 and 34 as shown. Further, an output transmission shaft 38 is inserted into a through hole coaxially formed in the output bevel gear 37, and is connected to the output bevel gear 37 by a connecting pin 37a. The output transmission shaft 38 is formed with a connection hole 38a having a hexagonal cross section and penetrating in the axial direction.
[0017]
On the other hand, as described above, the input bevel gear 25 which is movable on the input transmission shaft 24 in the longitudinal axis direction and is connected and attached so as to rotate integrally with the input transmission shaft 24 is attached to the idle bevel gears 33 and 34 by the spring 26a. Is always pressed. For this reason, the input bevel gear 25 normally meshes with the idle bevel gears 33 and 34 as shown in FIG.
[0018]
The tool 60 is mounted on the tool mounting device 20 having such a configuration as shown in FIG. At this time, the tip portion 61 of the tool 60 is inserted into the cylindrical opening of the tool connecting member 35 to perform mounting positioning, and at the same time, the hexagonal rotary drive shaft 62 of the tool 60 is inserted into the connecting hole 38a to connect the two. . In this state, when the hydraulic motor 15 is driven and the input transmission member 22 is rotationally driven by the drive shaft 15a, the input bevel gear 25 is rotationally driven via the input transmission shaft 24. The rotation of the input bevel gear 25 is transmitted to the output bevel gear 37 via the left and right idle bevel gears 33 and 34, and drives the output bevel gear 37 to rotate in the opposite direction to the input bevel gear 25. The rotation of the output bevel gear 37 is transmitted to the rotation drive shaft 62 of the tool 60 via the output transmission shaft 38, and the tool 60 is driven.
[0019]
Here, a ring-shaped release groove 25 a is formed on the outer periphery of the base of the input bevel gear 25. A cylindrical release ring 26 is rotatably mounted on the outer periphery of the distal end side of the main body 21. A pair of left and right release pins 27 protruding radially inward are mounted on the release ring 26. . Further, a guide opening 21a extending obliquely is formed on the outer peripheral surface of the main body 21, as shown in FIG. The width of the guide opening 21a is such that the intermediate portion of the release pin 27 can be inserted gently. The release pin 27 is disposed through the guide opening 21a as shown in the drawing, and the tip 27a is inserted into the release groove 25a. I'm stuck.
[0020]
Therefore, when the release ring 26 is rotated, the release pin 27 moves along the guide opening 21a, and the release ring 26 and the release pin 27 move toward the base (in the direction of arrow C) in accordance with the rotation of the release ring 26. I do. At this time, since the tip 27a of the release pin 27 has entered the release groove 25a, the input bevel gear 25 also moves together against the bias of the spring 26a, and separates from the idle bevel gears 33 and 34. The position of the input bevel gear 25 at this time is referred to as a disengagement position, and a position at which the input bevel gear 25 is urged by the spring 26a and meshes with the idle bevel gears 33 and 34 is referred to as a meshing position.
[0021]
In the state where the input bevel gear 25 is moved to the disengagement position, not only the left and right idle bevel gears 33 and 34 but also the output gear 37 can freely rotate. For this reason, in this state, the tool mounting member 30 can freely tilt (tilt in the direction of arrow A) around the tilt pin 31, and the tilt direction of the tool 60 can be adjusted together with the tool mounting member 30. Then, when the adjustment is completed, if the user releases the release ring 26, the input bevel gear 25 is returned to the meshing position by the urging force of the spring 26a.
[0022]
The guide groove may be formed as shown in FIG. The guide groove 40 includes a guide portion 41 extending in the longitudinal axis direction, a mesh holding groove 42 for holding the input bevel gear 25 at a meshing position, and a separation holding groove 42 for holding the input bevel gear 25 at a separation position. The input bevel gear 25 can be fixedly held.
[0023]
As described above, the tilting direction of the tool 60 can be adjusted together with the tool mounting member 30. However, in the tool mounting device 20, the turning direction of the tool 60 (turning direction adjustment in the direction of arrow B) can also be adjusted. . In this adjustment, the fixing bolt 39 is loosened to make the tool connecting member 35 rotatable with respect to the tool mounting member 30, and in this state, the turning position of the tool 60 is adjusted together with the tool connecting member 35. After this adjustment, the tool connecting member 35 is fixed again by the fixing bolt 39.
[0024]
In the above embodiment, the input gear is configured to be slidable in the axial direction so as to be able to engage with and disengage from the idle gear. However, the present invention is not limited to this. The output gear and the idle gear may be configured to be slidable and engageable / disengageable.
[0025]
【The invention's effect】
As described above, according to the present invention, the input gear or the output gear is slid in the longitudinal axis direction, and can be moved between the meshing position meshing with the idle gear and the disengagement position away from the idle gear. By rotating the input gear with the input gear (or output gear) positioned at the meshing position, this rotation is transmitted to the output gear via the idle gear meshing with the input gear, thereby rotating the output gear. By driving, the rotary drive shaft of the tool attached to the tool mounting member can be rotationally driven, while the input gear (or output gear) is located at the disengagement position and the input gear (or output gear) is shifted from the idle gear. If it is located at a distance, the output gear can rotate freely, and the tool mounting member that holds the output gear rotatably can be freely tilted about the orthogonal axis. Rukoto can, it is possible to easily adjust the direction of the tool attached thereto by tilting the tool mounting member.
[0026]
The input gear is slidable in the longitudinal direction. The biasing means is disposed in the body member to bias the input gear toward the meshing position, and is movable in the longitudinal direction with respect to the body member. And release means for holding the input gear rotatably. With this configuration, the input gear is normally located at the meshing position and meshes with the idle gear due to the biasing force of the biasing means, so that the input transmission member can be rotationally driven to drive the tool via the output gear. it can. Then, when the release means is forcibly moved in the longitudinal axis direction, the input gear can be moved to the disengagement position against the urging force of the urging means. Can be adjusted.
[Brief description of the drawings]
FIG. 1 is a sectional view of a tool mounting device for a working arm according to the present invention.
FIG. 2 is a front view of an aerial work vehicle having the working arm.
FIG. 3 is a partial sectional front view showing the working arm in detail.
FIG. 4 is a perspective view of a tool mounting device according to the present invention.
FIG. 5 is a sectional view of a tool mounting device for a working arm according to the present invention.
FIG. 6 is a perspective view showing a different example of the tool mounting device according to the present invention.
[Explanation of symbols]
Reference Signs List 10 Working arm 15 Hydraulic motor 20 Tool mounting device 25 Input bevel gear 31 Tilting pins 33, 34 Idle bevel gear 60 Tool

Claims (3)

A main body member that is formed in a hollow shape extending in the longitudinal axis direction and forms a distal end of the working arm;
A tool mounting member attached to the main body member so as to be tiltable about an orthogonal axis orthogonal to the longitudinal axis;
An input transmission member disposed rotatably around the longitudinal axis in the main body member;
In the main body member, an input gear connected to the input transmission member and rotatable together with the input transmission member,
A pair of idle gears arranged opposite to each other on the orthogonal axis, each of which can mesh with the input gear;
An output gear rotatably mounted on the tool mounting member and capable of meshing with the pair of idle gears,
The output gear is connectable to a rotation drive shaft of a tool attached to the tool attachment member,
A tool mounting device for a working arm, wherein at least one of meshing between the input gear and the idle gear and meshing between the idle gear and the output gear can be engaged and disengaged. . The input gear is slidable in the longitudinal axis direction within the main body member,
2. The input gear according to claim 1, wherein the input gear is slid in the longitudinal axis direction to be movable between a meshing position meshing with the idle gear and a disengagement position separating from the idle gear. 3. A tool mounting device for the working arm described in the above. Biasing means disposed in the body member to bias the input gear toward the meshing position;
Having release means attached to the main body member so as to be movable in the longitudinal axis direction and holding the input gear rotatably,
3. A structure in which the input gear can be moved to the disengagement position against the urging force of the urging means by moving the release means in the longitudinal axis direction. A tool mounting device for a working arm according to claim 1.

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