JP6632883B2 - Electric work machine - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric brush cutter, for example, an electric working machine driven by an electric motor.

  BACKGROUND ART An electric working machine such as a so-called brush cutter has a configuration in which a working section is supported at a front portion of a long operation rod and a power feeding section is supported at a rear portion, as disclosed in the following patent document. The working unit has a configuration in which an electric motor as a drive source, a reduction gear train, and the like are housed in a working unit housing. A cutting tool such as a circular cutter or a cutter wire is mounted on an output shaft of the working unit. The power supply unit is a part having a function of supplying power to the work unit by attaching a rechargeable battery pack or the like as a power supply or connecting a power cord for a commercial 100 V AC power supply. A controller including a power supply circuit and the like is housed in the unit housing, and a configuration is provided having a battery mounting portion for mounting a battery pack as a power supply.

  The working unit housing and the power supply unit housing are connected via an operating rod. A lightweight pipe material such as an aluminum steel pipe is used for the operating rod. Electrical wiring, such as a power supply line for supplying power to the work unit via the power supply unit and a signal line for controlling operation of the electric motor, etc., is wired between the work unit and the power supply unit via the operation rod. . In addition, this type of electric working machine is provided with an adjusting function that can adjust the length of the operating rod according to the user's physique. In many cases, the length adjustment mechanism has a rear portion of the operation rod supported in the power supply portion housing so as to be position-adjustable in a longitudinal direction of the power supply portion housing. By changing the position, the actual length can be adjusted.

JP 2014-117249 A

  Conventionally, there has been the following problem to be solved regarding the operation rod length adjusting mechanism. For example, when adjusting in a direction to shorten the length of the operating rod, a configuration in which the rear portion of the operating rod is adjusted in a direction in which the rear portion of the operating rod enters the power supply unit housing to reduce the distance between the power supply unit and the working unit. Has become. For this reason, the electric wiring wired inside the operation rod is tabbed in the length direction in the power supply unit housing by the length of the operation rod substantially shortened. Conventionally, in this case, the dubbed portion of the electric wiring may be damaged by being caught between the rear end of the operating rod and the power supply unit housing, and the moving distance is shortened by the amount of the electric wiring being caught. Therefore, there has been a problem that the adjustment cost is reduced.

  An object of the present invention is to prevent electric wires from being pinched as in the related art even when the length of the operating rod is adjusted in a direction to shorten the length.

  The above problems are solved by the following inventions. According to a first aspect of the present invention, there is provided a working unit including an electric motor as a drive source, a power supply unit for supplying electric power to the electric motor, a pipe unit supporting a working unit in a front part, and supporting a power supply unit in a rear part. The operation rod is provided between the working unit and the power supply unit through the operation rod, and the end of the operation rod is supported to be displaceable in the longitudinal direction with respect to the housing of the work unit or the power supply unit. And an electric working machine capable of adjusting an interval between the working unit and the power supply unit. In the first invention, a wiring holding portion for holding the electrical wiring drawn into the housing from the end of the operating rod in the housing of the working portion or the power feeding portion, and a wiring holding portion and an end of the operating rod between the wiring holding portion and the end of the operating rod. It has a configuration including a loop accommodation section for routing the electric wiring in a loop shape. In the first aspect, the electric wiring is arranged in a loop shape in which the electric wiring is crossed at least once in the loop accommodating portion.

  According to the first aspect of the present invention, when the end of the operating rod is relatively displaced in the direction in which the end of the operating rod enters the housing of the working unit or the power supply unit, and the operating rod is adjusted to be substantially shortened, the operating rod is shortened. Since the slack of the electric wiring generated by the displacement is displaced in the loop accommodating portion in the direction to increase the loop shape, the dub (slack portion) sandwiched between the operation rod and the housing does not occur. Since the electric wiring drawn out from the end of the operating rod is routed in a loop shape intersecting at least once between the wiring holding portion with respect to the housing and the end of the operating rod, the slack portion of the electric wiring is formed. Moves in the direction to enlarge the loop shape and is smoothly absorbed. The loop accommodating portion functions as a space (space portion) for absorbing the slack of the electric wiring when the operating rod is adjusted to a side that is substantially shortened (a side that reduces the interval between the working section and the power supply section). Since the slack of the electric wiring is absorbed by the loop accommodating portion, the electric wiring is prevented from being caught between the end of the operating rod and the housing. Conversely, when the end of the operating rod is displaced in a direction in which it is relatively pulled out of the housing in order to substantially lengthen the operating rod (increase the distance between the working unit and the power supply unit), the electric wiring is drawn into the operating rod. And is displaced in a direction to reduce the loop shape in the loop accommodating portion.

  In a second aspect based on the first aspect, the loop accommodating portion is disposed so as to be laterally offset with respect to a direction of displacement of the operating rod with respect to the housing, and is disposed forward of the electrical wiring with respect to the end of the operating rod. The electric working machine further includes a guide portion for guiding the electric wiring drawn from the end of the operating rod to the loop accommodating portion.

  According to the second aspect, when the operating rod is adjusted to the side that is substantially shortened, the slack portion of the electric wiring is guided in the direction displaced toward the loop accommodating portion through the guide portion. Is displaced in the direction in which the loop shape of the electric wiring smoothly increases, and the slack portion is smoothly absorbed.

  A third invention is the electric working machine according to the second invention, wherein a rib provided on the housing is inclined toward the loop accommodating portion side to serve as a guide portion.

  According to the third aspect, the electric wiring can be guided to the loop accommodating portion by effectively utilizing the ribs of the housing. Since the guide portion is not configured by using a separate member, the slack portion of the electric wiring can be smoothly absorbed without increasing the number of parts and reducing the weight.

  A fourth invention is the electric working machine according to the second or third invention, wherein the guide portion is provided with a sliding member for improving slidability with respect to the electric wiring.

  According to the fourth aspect, the slack of the electric wiring can be more smoothly and reliably guided to the loop accommodating portion.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, a mounting leg is provided in a housing of the power supply unit, and an internal space of the leg is used as a loop accommodation unit. It is an electric working machine.

  According to the fifth aspect, a portion serving as a relatively large empty space provided to allow the lower portion of the power supply unit housing to function as a leg when the electric working machine is mounted (installed) on a floor or the like. Can be effectively used as a loop accommodation section. While securing a sufficiently large space as the loop accommodating portion, this can also function as a leg portion.

  A sixth invention is the electric working machine according to any one of the first to fifth inventions, wherein the electric motor is a brushless motor.

  According to the sixth aspect, it is possible to reduce the size of the working unit, and it is not necessary to replace the brush, so that the maintainability of the electric working machine can be improved.

1 is an overall perspective view of an electric working machine according to an embodiment of the present invention. It is a longitudinal section of a work part. It is a longitudinal section of a feeding part. This figure shows a state where the operating rod is adjusted in a direction to shorten it. In this drawing, a state is shown in which the loop shape of the electric wiring is enlarged and the slack is absorbed. It is a longitudinal section of a feeding part. This figure shows a state in which the operating rod is adjusted in a direction to make it longer. In this drawing, a state is shown in which the electric wiring is pulled toward the working unit and the loop shape is reduced.

  Next, an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a so-called brush cutter (mower) is illustrated as an example of the electric working machine 1. As shown in FIG. 1, the electric working machine 1 includes a front working unit 10, a rear power feeding unit 20, and an operation rod 30 that connects the both. As shown in FIG. 2, the working unit 10 includes a working unit housing 11 having a left and right half-split structure, an electric motor 12 as a driving source, a reduction gear train 13 formed by meshing a driving gear 13a and a driven gear 13b, and an output. A shaft 14 and a tool holder 15 are provided. The electric motor 12 is a DC brushless motor, and is provided substantially at the center of the working unit housing 11. A cooling fan 16 is attached to an output shaft of the electric motor 12. When the electric motor 12 is activated and the cooling fan 16 rotates integrally, outside air is introduced into the working unit housing 11, and the electric motor 12 is cooled by the outside air (motor cooling air).

  The rotation output of the electric motor 12 is reduced by the reduction gear train 13 and output to the output shaft 14. A cutting tool holder 15 is attached to the output shaft 14. A cutting tool is mounted on the cutting tool holder 15. The figure shows a state in which two nylon cords 17 are mounted as cutting tools. Instead of the nylon cord 17, three resin blades that protrude in the radial direction or a circular metal blade can be attached to the blade holder 15.

  As shown in FIG. 1, a range substantially half the circumference behind the blade holder 15 is covered with a blade cover 18. The blade cover 18 prevents the cut grass from scattering toward the user. The blade cover 18 is supported by the working unit housing 11. A front guard 19 is attached to the working unit housing 11 in addition to the blade cover 18. The front guard 19 projects forward, opposite to the blade cover 18. By moving the working unit 10 laterally with the front guard 19 applied to a block wall or the like, so-called edge cutting can be performed quickly and neatly.

  A rod connecting portion 11a is provided at a rear portion of the working portion housing 11. The front end of the operating rod 30 is inserted and fixed to the rod connecting portion 11a. The working part 10 is connected to the front part of the operating rod 30 via the rod connecting part 11a. The operating rod 30 is a lightweight pipe made of a long aluminum steel pipe, and in this embodiment, a pipe that is gently curved up and down as shown in FIG. 1 is used. As shown in the figure, the operating rod 30 is gently curved in a direction to be recessed downward on the front side (working unit 10 side), and is gently curved in a direction bulging in a mountain shape on the rear side. Since the operating rod 30 is gently curved up and down, even a short user can use the working unit 10 in an appropriate posture.

  The power supply unit 20 is supported at the rear of the operation rod 30. Details of the power supply unit 20 are shown in FIGS. 3 and 4. The power supply unit 20 includes a power supply unit housing 21 having a left and right half structure. A battery mounting portion 22 for mounting the battery pack B is provided at a rear portion of the power supply portion housing 21. The power supply unit housing 21 includes a power supply circuit for controlling electric power supplied from the battery pack B and a controller 23 including a control circuit for controlling the operation of the electric motor 12.

  A grip 50 that is gripped by a user is provided at the front of the power supply unit 20. An operation unit 40 is provided at the front of the grip unit 50. The grip 50 is provided integrally with the power supply housing 21 of the power supply 20. The grip portion 50 is provided with a non-slip portion 50a for preventing a slip when the user grips the grip portion. In this embodiment, the surface of the grip portion 50 is covered with a rubber sheet material (elastomer resin layer) to form a non-slip portion 50a. An operation section housing 41 of the operation section 40 is integrally connected to a front portion of the grip section 50. The operation section 40 is provided with a trigger lever 42, a lock-off lever 43, an operation panel 44, and a rod lock section 45. When the trigger lever 42 arranged on the lower side is pulled upward (on side) with the fingertip of the hand holding the grip portion 50, the electric motor 12 is activated and the cutting tool rotates.

  The lock-off lever 43 disposed on the upper side opposite to the trigger lever 42 is an operation lever having a function of locking the trigger lever 42 to the off position. The trigger lever is only provided when the lock-off lever 43 is tilted downward. 42 can be pulled to the ON side. When the lock-off lever 43 is not tilted downward, the trigger lever 42 cannot be operated to the ON side, so that erroneous operation of the trigger lever 42 is prevented.

  The operation panel 44 includes a switch unit having a start switch and a forward / reverse switch, a light emitting unit for displaying an output mode (rotation speed) of the electric motor 12, and a light emitting unit for emitting light when the electric motor 12 rotates in the reverse direction. It has a part. When the start switch of the switch unit is turned on, the on operation of the trigger lever 42 is enabled, and the electric motor 12 starts. When the forward / reverse switch is turned on with the start switch on, the electric motor 12 rotates in the reverse direction. By rotating the electric motor 12 in the reverse direction, grass or the like entangled with the cutting tool can be released and easily removed. When the forward / reverse switch is turned on, the display unit emits light to notify the user that the blade is in the reverse rotation state. The output mode of the electric motor 12 can be switched stepwise by pressing and holding the start switch. The user is notified of the output mode switched by the change in the number of light emission of the light emitting unit.

  The rear part of the operation rod 30 is inserted into the insertion hole 31 provided coaxially with the operation part housing 41, the grip part 50, and the power supply part 20, and the operation part 40 and the grip part 50 are inserted into the rear part of the operation rod 30. The power supply unit 20 is supported. The rear portion of the operating rod 30 is inserted into the insertion hole 31 so as to be displaceable in the longitudinal direction (front-back direction) of the operating rod 30. By displacing the operation rod 30 in the longitudinal direction with respect to the insertion hole 31, the distance between the working unit 10 and the power supply unit 20 can be changed, and the length of the operation rod 30 is substantially adjusted. be able to.

  The rod lock portion 45 described above is provided at a front portion of the operation portion housing 41. The rod lock portion 45 includes a cylindrical restraining portion 41a provided integrally with a front portion of the operating portion housing 41, and a lock sleeve 45a for accommodating the restraining portion 41a on the inner peripheral side. The operating rod 30 is inserted into the inner peripheral side of the restraining portion 41a. The restraining portion 41a is provided with a slit formed in the axial direction and elastically deformable in the radial direction. A cam groove and a tapered surface are formed between the outer peripheral surface of the restraining portion 41a and the inner peripheral side of the lock sleeve 45a. When the lock sleeve 45a is rotated by the action of the cam groove, the lock sleeve 45a is displaced in the axial direction with respect to the restricting portion 41a. When the lock sleeve 45a is displaced in the axial direction, the restricting portion 41a is pressed in the diameter reducing direction by the action of the tapered surface, and is released in the diameter expanding direction by the elastic force.

  For this reason, when the lock sleeve 45a is rotated to the lock side by a predetermined angle, the operation portion 30 is restrained by the restricting portion 41a deforming in the diameter reducing direction by the action of the cam groove and the tapered surface. By being restrained by the restraining portion 41a, the operation rod 30 is locked so as not to be displaceable in the longitudinal direction. When the operation rod 30 is locked, the distance between the working unit 10 and the power supply unit 20 is fixed. Conversely, when the lock sleeve 45a is rotated to the lock-off side by a fixed angle, the restricting portion 41a is elastically deformed in the radially expanding direction to loosen the restraint of the operating rod 30, thereby adjusting the position of the operating rod 30 in its longitudinal direction. It becomes possible. By inserting and removing the operating rod 30 from the insertion hole 31, the distance between the working unit 10 and the power supply unit 20 can be arbitrarily adjusted within a certain range.

  A front portion of the insertion hole 31 and an inner peripheral hole 41aa of the restraining portion 41a and a guide sleeve 32 attached to a rear end of the operation rod 30 allow the operation rod 30 to pass through the insertion hole 31 without rattling in the radial direction. It is supported so as to be displaceable in the longitudinal direction. The power supply housing 21 is provided with a cylindrical rib 21a. The rear portion of the insertion hole 31 is defined by the rib 21a. The guide sleeve 32 is held so as to be displaceable in the axial direction without rattling in the radial direction with respect to the rib 21a. The front and rear portions of the cylindrical rib 21a are provided with a front stopper portion 21b and a rear stopper portion 21c which project toward the inner peripheral side, respectively. As shown in FIG. 3, the guide sleeve 32 abuts on the rear stopper 21c, and the position of the operation rod 30 with respect to the insertion hole 31 is set back. Conversely, as shown in FIG. 4, the guide sleeve 32 abuts on the front stopper 21b, and the forward end position of the operating rod 30 with respect to the insertion hole 31 is regulated. For this reason, the stroke in which the guide sleeve 32 can move between the front stopper portion 21b and the rear stopper portion 21c is an adjustment allowance for the operation rod 30.

  As shown in FIG. 1, a loop-shaped front handle 51 is supported on the operation rod 30 in front of the rod lock portion 45. The user can operate the electric working machine 1 in a stable posture by gripping the front handle 51 with one hand and gripping the grip portion 50 with the other hand. By changing the substantial length of the operating rod 30 by unlocking the rod locking part 45, the distance between the front handle 51 and the grip part 50 can be changed in accordance with the user's physique and the like. Thus, high workability and good usability of the electric working machine 1 are secured.

  On the inner peripheral side of the operating rod 30, an electric wiring 60 that electrically connects the electric motor 12 of the working unit 10 and the controller 23 of the power supply unit 20 is wired. The electric wiring 60 includes three power supply lines for supplying electric power to the electric motor 12. The electric wiring 60 has a loop shape corresponding to the adjustment allowance, in which the distance between the working unit 10 and the power supply unit 20 can be adjusted by adjusting the substantial length of the operation rod 30. Is provided with a loop-shaped routing portion R curled once.

  In the present embodiment, the loop-shaped routing portion R of the electric wiring 60 is set for a portion that is drawn into the power supply portion housing 21 via the rear end portion (the guide sleeve 32) of the operation rod 30. At the rear of the power supply housing 21, a loop accommodating portion 27 for accommodating the loop-shaped routing portion R is provided. The loop accommodating portion 27 corresponds to a space defined by a wall and a rib of the power supply housing 21. The rear and lower portion of the power supply housing 21 is provided with a portion that extends downward and functions as a leg 21d. By grounding the leg 21d and the blade cover 18 of the working unit 10, the electric working machine 1 can be placed on the ground in a stable posture. The inside of a portion corresponding to the leg portion 21d is a relatively large empty space. In the present embodiment, this empty space is used as the loop accommodating portion 27 for forming the loop-shaped routing portion R of the electric wiring 60.

  The loop accommodating portion 27 is provided at a position offset laterally (downward in the present embodiment) with respect to the moving direction of the operation rod 30 and at a lower side of the power supply portion housing 21. As shown in FIGS. 3 and 4, the loop routing portion R of the electric wiring 60 is routed in a loop shape in the loop housing portion 27. As shown in the drawing, the loop-shaped routing portion R of the electric wiring 60 is not held in a U-shaped loop shape but in a loop shape that intersects once in the loop accommodation portion 27. The loop-shaped routing portions R intersect when viewed from the side (the direction orthogonal to FIGS. 3 and 4). The part that intersects when viewed from the side is shifted left and right (in the direction perpendicular to the paper in FIGS. 3 and 4) when viewed from the front or the rear.

  A guide portion 24 for guiding the electric wiring 60 into the loop accommodating portion 27 is provided at a rear portion of the rib 21 a which defines a rear portion of the insertion hole 31. In the present embodiment, the guide portion 24 is provided with a wall surface that is inclined in such a direction as to be displaced downward toward the rear side. When the operating rod 30 is inserted into the insertion hole 31 to reduce the substantial length of the operating rod 30, the electric wiring 60 is displaced rearward as shown by a white arrow (3) in FIG. As a result, the guide portion 24 comes into contact with the loop housing portion 27 and is smoothly guided. A rear wall portion 21e that constitutes a rear wall surface of the power supply unit housing 21 is disposed forward of the guide portion 24 in the guiding direction. The electric wiring 60 is smoothly guided by the guide portion 24 toward the loop accommodating portion 27, and further comes into contact with the rear wall portion 21e, so that the loop shape of the loop shape routing portion R is smoothly enlarged. By increasing the loop shape of the loop-shaped routing portion R, the electric wiring 60 behind the rear end (the guide sleeve 32) of the operating rod 30 is prevented from being slackened, so that the electric wiring 60 is not pinched.

  The electric wiring 60 is held by a wiring holding section 25 provided in the power supply section housing 21 behind the rear end of the operating rod 30 (forward in the drawing direction of the electric wiring 60) and behind the guide section 24. In the present embodiment, a slit is provided in a part of the rib of the power supply unit housing 21 as the wiring holding unit 25. The electric wiring 60 is pushed into the wiring holding portion 25 and fixed. Between the wire holding portion 25 and the rear end of the operating rod 30, a loop-shaped loop-shaped routing portion R is formed in the electric wire 60.

  As shown in FIG. 3, when the substantial length of the operating rod 30 is shortened to reduce the interval between the working unit 10 and the power supply unit 20, the electric wiring 60 is correspondingly replaced by a white arrow (3) in FIG. 3. As a result, as shown in FIG. 7, the loop is moved rearward and pushed back into the loop accommodating portion 27. As a result, the loop-shaped routing portion R becomes longer and its loop shape becomes larger. On the other hand, as shown in FIG. 4, when the substantial length of the operating rod 30 is increased to increase the distance between the working unit 10 and the power supply unit 20, the electric wiring 60 becomes white by that amount. As a result of being pulled out to the working unit 10 side as shown by the arrow (4), the loop-shaped routing unit R is shortened and the loop shape is reduced. As described above, by adjusting the substantial length of the operating rod 30, the loop shape of the loop-shaped routing portion R becomes larger or smaller in the loop accommodating portion 27. In the present embodiment, by utilizing a relatively large empty space as the loop accommodating portion 27, the loop routing portion R can be accommodated in a loop shape having a relatively large curvature.

  A rectangular flat plate-shaped controller 23 is attached to the upper part of the rib 21 a that defines the rear part of the insertion hole 31. The electric wiring 60 is connected to the controller 23. Electric power is supplied from the controller 23 including the power supply circuit to the electric motor 12 via the electric wiring 60. Further, information on induced voltage generated in the coil of the electric motor 12 is acquired by the controller 23 via the electric wiring 60. The controller 23 calculates the state (rotation state, etc.) of the electric motor 12 based on the motor information, and supplies power to the electric motor 12. As described above, the battery mounting section 22 for mounting the battery pack B is provided at the rear of the power supply section housing 21. As shown in FIG. 1, the power of the battery pack B attached to the battery attachment section 22 is supplied to a power supply circuit of the controller 23 via a power supply line not shown.

  As described above, the electric wiring 60 is fixed to the power supply unit housing 21 by the wiring holding unit 25. For this reason, even when the position of the operation rod 30 is adjusted with respect to the insertion hole 31, the electric wiring 60 is not displaced between the wiring holding unit 25 and the controller 23, and the routing path does not change. Since the electric wiring 60 between the wiring holding unit 25 and the controller 23 is not affected by the adjustment of the position of the operating rod 30 with respect to the routing path, the loop shape of the loop-shaped routing unit R in the loop accommodation unit 27 is smoothly formed. It gets bigger and smaller.

  According to the present embodiment configured as described above, when the rod lock portion 45 is loosened to the unlock side to adjust the substantial length of the operation rod 30, the distance between the working unit 10 and the power supply unit 20 is changed. Therefore, it is necessary that the electric wiring 60 has a function of expanding and contracting substantially. In the present embodiment, the power supply unit 20 is provided with a loop-shaped routing unit R for giving the electric wiring 60 a substantial expansion and contraction function. The loop-shaped routing portion R is routed in a loop shape in which the electric wiring 60 crosses once. The loop-shaped routing portion R is accommodated in a loop accommodation portion 27 provided at a lower rear portion of the operation rod 30. Substantial expansion and contraction of the electric wiring 60 is achieved by increasing or decreasing the loop shape of the loop-shaped routing portion R.

  As described above, any slack (dubbing) of the electric wiring 60 caused by the adjustment of the length of the operating rod 30 is absorbed by the loop-shaped manipulating portion R in the loop accommodating portion 27, so that dubbing occurs at other portions. Does not occur. For this reason, the trouble that the dub (loose portion) of the electric wiring 60 is sandwiched between the rear end portion (guide sleep 32) of the operation rod 30 and the power supply portion housing 21 does not occur. Since such pinching does not occur and there is no large movement resistance of the electric wiring 60, the operating rod 30 can be easily moved until it comes into contact with the rear stopper portion 21c. The original adjustment allowance can be reliably obtained.

  In the present embodiment, since the loop-shaped routing portion R of the electric wiring 60 is routed in a loop shape having a relatively large curvature crossed at least once, a plurality of wirings such as a power supply line and a signal line are connected to each other. It is particularly suitable for the routing of strong electric wires bundled in a book and having relatively high resistance to bending.

  In the illustrated embodiment, the guide 24 is provided behind the operating rod 30. When the operation rod 30 is adjusted in the direction of shortening the substantial length, the electric wiring 60 is reliably guided toward the inside of the loop accommodating section 27 by the guide portion 24, so that the electric wiring 60 is slack behind the operation rod 30. Is less likely to occur, whereby the electric rod 60 can be more reliably prevented from being pinched by the operating rod 30.

  The embodiment described above can be variously modified. For example, although the configuration in which the loop-shaped routing portions R of the electric wiring 60 intersect once in the loop accommodating portion 27 has been exemplified, the configuration may be such that the loops intersect twice or more like a coil.

  Although the inclined wall surface (guide plate) is exemplified as the guide portion 24 for guiding the electric wiring 60 toward the loop housing portion 27, an annular portion (guide ring) and a tubular portion (guide sleeve) are used instead. ) Or using a roller. Further, a sheet material having high slidability is attached to the guide portion 24 as a sliding member for improving the slidability against the electric wiring 60, or a lubricant such as grease is applied, so that the electric wiring 60 Can be guided into the loop accommodating portion 27 with less resistance.

  Although the configuration in which the loop accommodating portion 27 is offset downward from the moving direction (axial direction) of the operating rod 30 is illustrated, the loop accommodating portion may be arranged at a position offset upward. In addition, the loop accommodating portion may be arranged laterally (in the direction perpendicular to the paper in FIGS. 3 and 4) with respect to the moving direction of the operating rod 30. Further, the loop housing portion may be configured to be disposed behind the operating rod 30 in the moving direction.

  Also, the configuration in which the substantial length of the operation rod 30 is adjusted by displacing the rear side of the operation rod 30 with respect to the power supply unit 20 has been described. Is displaced so that its substantial length can be adjusted, the above-described routing structure of the electric wiring 60 can be applied. In this case, the same operation and effect can be obtained by providing a similar loop accommodating section in the working section housing 21 and arranging the loop-shaped section of the electric wiring in a loop shape crossing at least once in the loop accommodating section. Can be obtained.

  In addition, although a so-called brush cutter is illustrated as the electric working machine 1, a working machine such as a lawnmower, a blower, a vacuum cleaner, or the like that performs a predetermined work on the ground or a floor surface in a standing posture of a user. Can be widely applied.

  In the above embodiment, an example was described in which the power supply was a battery (DC power supply), but the power supply may be an AC power supply. When a battery is used as a power supply as illustrated, the power supply unit 20 is provided with a battery mounting unit 22. When an AC power supply is used as a power supply, for example, the power supply unit is provided with a connector for connecting a power cord. Will be furnished.

  In the above-described embodiment, an example in which three power supply lines are bundled as the wiring passing through the inside of the rod is shown. However, the wiring may be, for example, a signal line through which a signal from the trigger to the controller flows. The wiring may be, for example, a detection signal of a sensor that detects the rotation state (position) of the motor. As described above, the present invention is also applicable to signal lines through which various signals flow.

1: Electric work machine (claw cutter)
DESCRIPTION OF SYMBOLS 10 ... Work part 11 ... Work part housing, 11a ... Rod connection part 12 ... Electric motor 13 ... Deceleration gear train, 13a ... Drive side gear, 13b ... Driving side gear 14 ... Output shaft 15 ... Cutting tool holder 16 ... Cooling fan 17 ... Nylon cord 18 Cutting tool cover 19 Front guard 20 Power supply 21 Power supply housing 21a Rib 21b Front stopper 21c Rear stopper 21d Leg 21e Rear wall 22 Battery mounting 23 ... Controller 24 ... Guiding part 25 ... Wiring holding part 27 ... Loop accommodating part B ... Battery pack 30 ... Operating rod 31 ... Inserting hole 32 ... Guide sleeve 40 ... Operating part 41 ... Operating part housing, 41a ... Constraint part, 41aa ... Circumferential hole 42 Trigger lever 43 Lock-off lever 44 Operation panel 45 Rod locking portion 45a Lock sleeve 50 Gripper Parts, 50a ... slip portion 51 ... front handle 60 ... electric wiring R ... loop form handling unit

Claims (4)

A working unit having an electric motor as a drive source therein, a power supply unit for supplying electric power to the electric motor, a pipe-shaped operating rod supporting the work unit at a front part and supporting the power supply unit at a rear part. And an electric wire is wired between the working unit and the power supply unit via the inside of the operation rod, and an end of the operation rod is displaceable in a longitudinal direction with respect to the housing of the work unit or the power supply unit. An electric work machine supported by the work unit and capable of adjusting an interval between the work unit and the power supply unit,
In the housing of the working unit or the power supply unit, a wire holding unit that holds an electrical wire drawn into the housing from an end of the operation rod, and a wire holding unit between the wire holding unit and the end of the operation rod. It is provided with a loop accommodating part which arranges the electric wiring in a loop shape, and is configured to arrange the electric wiring in a loop shape crossed at least once in the loop accommodating part ,
The loop accommodating portion is disposed so as to be offset laterally with respect to a displacement direction of the operation rod with respect to the housing, and is provided in the housing in a leading direction of the electric wiring with respect to an end of the operation rod in a drawing direction. An electric working machine having a configuration in which a guide is provided by inclining a rib toward the loop housing portion, and the guide portion guides an electric wire drawn from an end of the operating rod to the loop housing portion . 2. The electric working machine according to claim 1 , wherein a sliding member for improving slidability with respect to the electric wiring is provided on the guide portion. 3. 3. The electric working machine according to claim 1, wherein a mounting leg is provided on a housing of the power supply unit, and an electric space using the internal space of the leg for the loop storage unit. 4. Machine. An electric working machine as set forth in any one of claims 1 to 3, the electric operating machine the electric motor is a brushless motor.

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