JP2012055195A - Portable working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable working machine having excellent weight valance and excellent operability.SOLUTION: The portable working machine 100 equipped with an electrically driven motor 3 installed in the beginning terminal part of a main rod 1, and a bush-cutter 4 at the end terminal part of the main rod 1 is equipped with a battery 6 for driving the electrically driven motor 3 in a middle part of the main rod 1. The portable working machine 100 has the excellent weight valance because the heavy battery 6 is installed in the middle part of the main rod 1, and the excellent operability because the electrically driven motor 3 being the vibration sauce is installed in the beginning terminal part of the main rod 1 apart from the middle part of the main rod 1 witch is the attaching position of a handle 8 to reduce the transmission of the vibration to an operator.

Description

  The present invention relates to a portable working machine such as a brush cutter or a blower.

  2. Description of the Related Art Conventionally, a portable working machine is known in which a working machine such as a brush cutter or a blower and a motor that drives the working machine are attached to a main shaft provided with a handle so as to be integrated or separable.

  For example, Patent Document 1 below describes an integrated electric brush cutter in which a cutting blade is attached to the front end portion of the main pipe handle, and an electric motor and a battery are attached to the rear portion of the main pipe handle. ing. Patent Document 2 below describes an electric brush cutter in which a motor is attached to the tip of an operating rod and a cutter is directly attached to the motor. In these brush cutters, since heavy objects such as a motor and a battery are all arranged at the end of the main fence, the weight balance is poor and workability is poor.

  In order to solve such a problem, in the mowing machine described in Patent Document 3 below, an action part in which a cutting blade or the like is attached to the tip part of the entire mowing machine, a motor part in which a motor is housed in an intermediate part, A power supply unit in which a battery is stored is arranged at the rear, and the action unit and the motor unit are connected by a front operation rod, and the motor unit and the power supply unit are connected by a rear operation rod. A handle is provided in the vicinity of the motor unit. And since there is a motor part in the middle part, even if the posture of the mower changes, there is little change in the weight balance, and even if the working part side is lifted up, the operator is less fatigued.

JP 2008-237189 A Japanese Utility Model Publication No.5-2620 Japanese Patent No. 4122484

  However, in the mowing machine described in Patent Document 3 described above, since the motor unit serving as a vibration source is disposed near the handle gripped by the worker, vibration is easily transmitted to the worker, which causes a reduction in workability. There is a fear. In order to prevent this, a damping mechanism may be provided between the handle and the motor unit, but the apparatus becomes complicated.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a portable working machine that is excellent in weight balance and excellent in workability.

  The portable work machine according to the present invention is equipped with a motor (3) at the start end of the main work (1) and a work machine (4) at the end of the main work (1). A battery (6) for driving the electric motor (3) is provided in an intermediate portion of the main shaft (1).

  In this invention, since a heavy battery (6) is provided in the intermediate part of the main cage | basket (1), it is excellent in weight balance. In addition, since the electric motor (3) serving as a vibration source is installed at the starting end of the main rod (1) that is distant from the middle portion of the main rod (1) as the mounting position of the handle (8), Vibration is not easily transmitted and workability is excellent.

  Here, if the control part (7) is attached to the holder (5) holding the battery (6), the wiring (L2) between the battery (6) and the control part (7) is connected to the holder (5). Since it can be housed in the wiring, the wiring becomes easy and the wiring (L2) can be protected.

  If the handle (8) is attached to the holder (5) that holds the battery (6), the structure is simplified.

  Further, when the operation portion (74A) is arranged on the grip portion (83) of the handle (8), the operability of the operation portion (74A) is further improved, and further, the battery (6) and the operation portion (74A) are improved. Since the wiring (L3) between the two can be accommodated in the handle (8), the wiring becomes easy and the wiring (L3) can be protected.

  Further, when the holder (5) for holding the battery (6) and the electric motor (3) are provided with mounting feet (53, 31) protruding downward, the portable work machine is placed on the ground. When placing, the grounding point becomes two points of the holder (5) and the electric motor (3), and can be stably placed on the ground.

  ADVANTAGE OF THE INVENTION According to this invention, the portable working machine excellent in weight balance and excellent in workability | operativity can be provided.

1 is a perspective view showing a portable work machine according to a first embodiment of the present invention. It is a disassembled perspective view which shows the portable working machine shown in FIG. It is an expansion disassembled perspective view which shows the principal part of the portable working machine shown in FIG. It is an enlarged side view which shows the principal part of the portable working machine shown in FIG. It is an enlarged side view which shows the principal part of the portable working machine which concerns on 2nd embodiment of this invention. It is a disassembled perspective view which shows the portable working machine which concerns on 3rd embodiment of this invention.

  Hereinafter, preferred embodiments of a portable work machine according to the present invention will be described in detail with reference to the drawings. The same reference numerals are assigned to the same elements, and duplicate descriptions are omitted.

  1 is a perspective view showing a portable work machine according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view showing the portable work machine shown in FIG. 1, and FIG. 3 is a perspective view of the portable work machine shown in FIG. 4 is an enlarged exploded perspective view showing the main part, and FIG. 4 is an enlarged side view showing the main part of the portable work machine shown in FIG.

  The portable work machine 100 is for an operator to shave grass and small trees while holding it with a shoulder belt and manipulating it with both hands. As shown in FIG. 1, the portable work machine 100 includes a main body part 110 on the right side of the figure and a work machine part 120 on the front side thereof.

  The main body 110 includes a bar-shaped rear bar 11, and the work machine unit 120 includes a bar-shaped front bar 12 having a thickness equivalent to that of the rear bar 11 and shorter than the rear bar 11. The front collar 12 is connected to the rear collar 11 at the connecting portion 2 provided on the rear collar 11, and the rear collar 11 and the front collar 12 constitute the main cage 1. As shown in FIG. 2, the work machine unit 120 can be attached to and detached from the main body unit 110 at the connecting unit 2.

  Returning to FIG. 1, a brush cutter (work machine) 4 is provided at the front end portion of the front rod 12, that is, the front end portion (terminal portion) of the main rod 1. The brush cutter 4 includes a cutting blade 41 and a cover 42. The cutting blade 41 has a disk shape with a blade (not shown) provided on the outer peripheral portion, is rotatably attached to the front end portion of the front ridge 12, and rotates to cut grass and small trees. The cover 42 is attached to the rear side of the cutting blade 41 in the front saddle 12, covers the cutting blade 41 so that grass and small trees cut off by the cutting blade 41 do not scatter toward the operator, and is portable. When the machine 100 is placed on the ground or the like, it becomes a foot for placement.

  An electric motor (electric motor) 3 for rotating the cutting blade 41 is attached to the rear end portion of the rear rod 11, that is, the rear end portion (starting end portion) of the main rod 1. The electric motor 3 is provided with a mounting foot 31 that protrudes downward (lower side in the figure).

  A battery holder 5 is provided in the vicinity of the rear side of the connecting portion 2 of the rear rod 11, that is, substantially in the middle of the main rod 1. The battery holder 5 is for holding the battery 6 and comprises a holder upper part 51, a holder lower part 52, and legs 53, 53 as shown in FIG.

  The holder upper portion 51 has a substantially rectangular parallelepiped shape. A holder lower portion 52 is disposed on the lower surface of the holder upper portion 51, and the rear flange 11 passes through the center of the holder upper portion 51 and the holder lower portion 52. The rear part of the holder lower part 52 projects downward from the front part, and mounting legs 53, 53 projecting downward are provided on the lower surface of the holder lower part 52 so as to be separated in the left-right direction. The battery 6 whose outer shape is a substantially rectangular parallelepiped is detachably attached so as to contact the front lower surface and the rear front surface of the holder lower portion 52.

  The battery 6 is a cassette type battery and has a weight that occupies about 20% of the total weight of the portable work machine 100.

  A controller 7 for controlling the driving of the electric motor 3 is attached to the front part of the holder upper part 51. As shown in FIG. 4, a wiring L <b> 1 is connected to the control unit 7. The wiring L <b> 1 passes through the battery holder 5, passes through the rear end portion of the battery holder 5, and extends along the outer surface of the rear cage 11. It is wired toward the rear and connected to the electric motor 3 (see FIG. 1). A portion along the outer surface of the rear collar 11 of the wiring L1 is covered with a covering material to protect the wiring L1. Further, a wiring L2 is connected to the control unit 7, and the wiring L2 passes through the battery holder 5 and is connected to a terminal portion 54 provided in the holder lower part 52. The terminal portion 54 is connected to the battery 6. Accordingly, the electric power of the battery 6 is supplied to the electric motor 3 via the control unit 7.

  As shown in FIG. 3, the control unit 7 includes a display unit 71 and an operation unit 72, and the operation unit 72 includes a power switch 73 and a rotation speed adjustment switch 74. The power switch 73 and the rotation speed adjustment switch 74 are for operating the electric motor 3. The power switch 73 turns the electric motor 3 on and off, and the rotation speed adjustment switch 74 controls the rotation speed of the electric motor 3. The rotation speed of the cutting blade 41 is adjusted. The display unit 71 displays the remaining amount of the battery 6, the rotational speed of the cutting blade 41, and the like.

  A handle 8 is attached to the upper surface of the rear part of the holder upper part 51. The handle 8 includes a handle attachment portion 81, handle portions 82 and 82, and grip portions 83 and 83. The handle attachment portion 81 has a substantially rectangular parallelepiped shape and is attached to the upper surface of the rear portion of the holder upper portion 51. The handle portions 82 and 82 each have a rod shape bent in an L shape and are attached to the side surfaces of the handle attachment portion 81, respectively. It has been. An end portion of the handle portion 82 projects rearward and upward, and a grip portion 83 is provided at this end portion.

  A transmission mechanism for transmitting the driving force of the electric motor 3 to the cutting blade 41 is provided inside the main rod 1, and a shoulder belt is attached in the vicinity of the battery holder 5.

  In such a portable brush cutter 100, an operator holds the portable brush cutter 100 from the shoulder via a shoulder belt, presses the power switch 73, drives the electric motor 3 to rotate the cutting blade 4, and moves the handle 8. While manipulating the grip portion 83 with both hands, the grass and small trees are cut off by the rotating cutting blade 4.

  When cutting grass or small trees, the heavy battery 6 is provided in the middle portion of the main fence 1 via the battery holder 5, so that the weight balance is excellent.

  In addition, since the electric motor 3 serving as a vibration source is mounted on the rear end portion of the main shaft 1 away from the middle portion of the main shaft 1 where the handle 8 is attached, vibration is not easily transmitted to the operator. Excellent workability.

  Moreover, since the control part 7 is attached to the battery holder 5 holding the battery 6, the wiring L2 between the battery 6 and the control part 7 is accommodated in the battery holder 5, and wiring becomes easy and wiring L2. Can be protected.

  Further, since the control unit 7 is provided in the vicinity of the handle 8, the operability of the power switch 73 and the rotation speed adjustment switch 74 provided in the control unit 7 is improved, and the display unit 71 provided in the control unit 7. Visibility is improved.

  Further, since the handle 8 is attached to the battery holder 5 that holds the battery 6, the structure is simple.

  In addition, since the battery holder 5 and the electric motor 3 that hold the battery 6 are provided with mounting feet 31, 53, and 53 that protrude downward, the work unit 120 is removed to remove the main body 110. When placed on the ground, the grounding points are the two points of the battery holder 5 and the electric motor 3 and can be stably placed on the ground. Therefore, the work unit 120 can be easily attached and detached. When the portable work machine 100 is placed on the ground with the work machine unit 120 attached, the installation locations are the three points of the cover 41 of the brush cutter 4, the battery holder 5, and the electric motor 3.

  Further, since the battery 6 is a cassette type, it can be easily attached to and detached from the battery holder 5.

  Next, a portable brush cutter according to a second embodiment of the present invention will be described.

  FIG. 5 is an enlarged side view showing a main part of the portable work machine according to the second embodiment of the present invention. This portable work machine 200 is different from the portable work machine 100 according to the first embodiment in that the rotation speed adjustment switch 74 is disposed in the grip portion 83 and is used as a rotation speed adjustment switch lever 74A. Accordingly, the wiring L3 connected to the control unit 7 from the rotation speed adjustment switch lever 74A through the handle 8 and the holder upper portion 51 is increased.

  When the rotation speed adjustment switch lever 74A is gripped, the electric motor 3 is driven and the cutting blade 41 is rotated. The greater the pushing amount of the rotation speed adjustment switch lever 74A, the higher the rotation speed of the cutting blade 41. When the pushing amount of the rotation speed adjustment switch lever 74A is maximized, the rotation speed of the cutting blade 41 reaches the maximum. When the gripping of the rotation speed adjustment switch lever 74A is stopped, the cutting blade 41 stops rotating.

  In such a portable work machine 200, since the rotation speed adjustment switch lever 74A is disposed in the grip portion 83 of the handle 8, the operability of the rotation speed adjustment switch lever 74A is further improved, and the rotation speed of the cutting blade 41 is improved. The adjustment becomes easier.

  Further, the wiring L3 between the control unit 7 and the rotation speed adjustment switch lever 74A is accommodated in the handle 8 and the battery holder 5, so that the wiring can be facilitated and the wiring L3 can be protected.

  Next, a portable brush cutter according to a third embodiment of the present invention will be described.

  FIG. 6 is an exploded perspective view showing a portable work machine according to the third embodiment of the present invention. This portable work machine 300 is different from the portable work machine 100 according to the first embodiment in that a work machine part 130 having a blower (work machine) 9 is used instead of the work machine part 120 having the brush cutter 4. It was a point. The blower 9 is for rotating the rotating blades by the driving force transmitted from the electric motor 3 to generate wind and blowing the grass and small trees with this wind. The blower 9 is attached to the front end portion of the front bush 12. Yes. The blower 9 is also provided with a mounting foot 91 that protrudes downward.

  In such a portable work machine 300, after cutting the grass and small trees with the portable work machine 100 having the brush cutter 4, the work machine part 120 is removed from the connecting part 2 and the work machine part 130 having the blower 9 is replaced. The blower 9 can blow away the grass and small trees that have been replaced and cut off. As described above, since the work implement unit can be attached to and detached from the main body 110 at the connecting portion 2, the work implement unit can be changed to various work implements.

  Moreover, since the heavy battery 6 is provided in the intermediate part of the main shaft 1 via the battery holder 5, it is excellent in weight balance and can work with equivalent weight balance even if the working machine is changed.

  In addition, this invention is not limited to the said embodiment. For example, in the portable work machine 200 according to the second embodiment, the rotation speed adjustment switch lever 74A is disposed in the grip portion 83, but the power switch 73 may be disposed in the grip portion 83 to serve as the power switch lever 73A. . In this way, the electric motor 3 can be easily driven.

  DESCRIPTION OF SYMBOLS 1 ... Main board, 3 ... Electric motor (electric motor), 4 ... Brush cutter (work machine), 5 ... Battery holder (holder), 6 ... Battery, 7 ... Control part, 8 ... Handle, 9 ... Blower (work machine) , 31, 53 ... feet, 72, 72A ... operation part, 83 ... grip part, 100, 200, 300 ... portable work machine.

Claims (5)

In the portable work machine equipped with the electric motor (3) at the start end of the main work (1) and equipped with the work machine (4) at the end of the main work (1),
A battery (6) for driving the electric motor (3) is provided in an intermediate portion of the main cage (1);
A portable work machine characterized by   The portable work machine according to claim 1, wherein a control section (7) is attached to a holder (5) for holding the battery (6).   The portable work machine according to claim 1 or 2, wherein a handle (8) is attached to a holder (5) for holding the battery (6).   2. The portable work machine according to claim 1, wherein an operation part (74A) is arranged on a grip part (83) of the handle (8).   The holder (5) for holding the battery (6) and the electric motor (3) are provided with mounting feet (53, 31) protruding downward. The portable work machine according to any one of 4.

Images