DE202016006000U1 - Electrically powered implement - Google Patents

Abstract

An electric power tool having a working portion in which an electric motor is accommodated as a power tool driving source, a Stromzuführabschnitt for supplying the electric motor with power and a tubular operating rod, at the front part of the working portion is mounted and at the rear portion of the Stromzuführabschnitt is mounted, wherein through the inside of the operating rod electrical wiring between the working portion and the Stromzuführabschnitt is laid and an end portion of the operating rod with respect to the housing of the working portion or the Stromzuführabschnitts is mounted displaceably in the longitudinal direction and a distance between the working portion and the Stromzuführabschnitt is adjustable, wherein Housing the working portion or the Stromzuführabschnitts a wire holding portion that holds the electrical wiring, pulled from the end portion of the operating rod into the interior of the housing is provided, and a loop-receiving portion is provided, around which the electrical wiring between the wire-holding portion and the end portion of the operating rod loops around, wherein the electrical wiring on the loop-receiving portion circulates at least once crossing in a loop shape.

Description

Technical area

The present invention relates to an electrically driven working device, for example an electrically driven brushcutter, with an electric motor as the drive source.

General state of the art

Electrically driven tools such as brushcutters and the like have a structure as disclosed in the below-identified patent, in which a working portion is supported at the front portion of an elongate operating rod and a power supply portion is supported at a rear portion. The working portion has a structure wherein an electric motor and a reduction gear and the like are accommodated in a working portion housing as a driving source. On an output shaft of the working section, a cutting element such as a circular blade or a cutting wire is mounted. The power supply section is a part to which a rechargeable battery pack or the like is attached as a power source, or has a function of connecting a power cable of a commercial 100V AC power source to supply power to the working section, in the case of a rechargeable battery configuration in the power supply section housing is incorporated with power circuits and the like, and a structure with a Akkukbringungsabschnitt for attaching the battery pack is present as a power source.

The work section housing and the power supply section housing are coupled together via an operating rod. As an operating rod, an aluminum-steel pipe or other lightweight pipe material is used. Through the inside of the operating rod, wires for powering the working portion via the power supply portion or electrical wiring for signal lines and the like for operating control of the electric motor, etc. are laid between the working portion and the power supply portion. In this type of electrically driven implement a device is provided which has an adjustment function, wherein the length of the operating rod is adjustable in adaptation to the stature of the user. In many cases, in such a length adjustment mechanism, a rear portion of the operating rod is longitudinally displaceable relative to the Stromzuführabschnittsgehäuse positionally adjustable, and the practical length is made adjustable by the rear portion of the operating rod is moved in relation to the Stromzuführabungsgehäuse in position.

Documents of the prior art

Patent documents

Patent Document 1:

• Japanese Patent Laid-Open Publication No. 2014-117249

Brief description of the invention

Object of the present invention

The length adjusting mechanism of the control rod of the prior art has the following problems. For example, when the operating rod is displaced in the shortening direction, the structure is such that the rear portion of the operating rod is displaced in a direction to enter the power supply unit housing, thereby shortening the distance between the power supplying portion and the working portion. The electrical wiring routed inside the control pole raises lengthwise in the length of the practical shortening of the control pole inside the power supply section housing. In the prior art, there is a problem that there is a risk that the raised part of the electric wiring between the rear end portion of the operating rod and the Stromzuführabungsgehäuse is pinched and damaged, or that the distance is shortened only by the trapped portion of the electrical wiring, which reduces the amount of adjustment.

Object of the present invention is to ensure that even when adjusting in shortening direction of the operating rod, the electrical wiring is not clamped as in the prior art.

Means for solving the problem

The object is achieved by the inventions specified below. The first invention is an electric power tool having a working portion in which a electric motor is accommodated as a working machine drive source, a power supply section for supplying electric power to the electric motor and a tubular operating rod having the working portion supported at the front portion thereof and at the rear portion thereof Stromzuführabschnitt is stored, wherein is routed through the interior of the operating rod electrical wiring between the working portion and the Stromzuführabschnitt and the rear portion of the operating rod with respect to the housing of the working portion and the Stromzuführabschnitts is stored displaced in the longitudinal direction and a distance between the working portion and the Stromzuführabschnitt is adjustable. In the first invention, a structure is provided, wherein on the housing of the working portion or the Stromzuführabschnitts a wire holding portion which holds the electrical wiring, which is pulled from the rear portion of the operating rod inside the housing, and a loop receiving portion is provided to the electrical wiring between the wire holding portion and the rear portion of the operating rod loops around. In the first invention, the electrical wiring on the loop receiving portion is looped at least once crossing.

According to the first invention, in an adjustment, wherein the operating rod is practically shortened by the rear portion of the operating rod is displaced with respect to the housing of the working portion and the Stromzuführabschnitts in an incoming direction in this, a limp part of the electrical wiring, the in accordance with the amount of shortening, displaced at the loop receiving portion in a direction in which the loop shape becomes larger, so that no warp (slackened part) is formed, which is clamped between the operating rod and the housing. By revolving the electric wiring pulled out of the rear portion of the operating rod with respect to the housing between the wire holding portion and the rear portion of the operating rod at least once in the form of a loop, the slack portion of the electrical wiring is moved in the direction , in which the loop shape enlarges, and received without hindrance. The loop receiving portion serves as a space for accommodating the slack portion of the electrical wiring when the operating rod is moved toward the practically shortening side (to the side which reduces the distance between the working portion and the power supply portion). Since the slack portion of the electrical wiring is received by the loop receiving portion, the electrical wiring is prevented from being pinched between the rear portion of the operating rod and the housing. On the other hand, if a practical extension of the operating rod (enlargement of the distance between the working portion and the power supply portion) is to displace its rear portion in the withdrawing direction with respect to the housing, the electric wiring is drawn inside the operating rod and is displaced in a direction in which the loop shape becomes smaller at the loop receiving portion.

In the second invention, at the loop accommodating portion, the displacing direction of the operating rod with respect to the housing is guided via a guide portion in a displacement direction toward the loop accommodating portion, whereby the loop shape of the electric wiring on the loop accommodating portion is displaced in a direction of uniform magnification and the flaccid part is uniformly received ,

According to the second invention, when the operating rod is practically shortened, the slack portion of the electrical wiring is displaced toward the loop-receiving portion via the guide portion, thereby shifting the loop shape of the electrical wiring at the loop-receiving portion in a direction of uniform magnification and uniformly accommodating the slack portion.

In the third invention is an electrically driven working device of the second invention, wherein a housing provided on the rib, which is inclined to the loop receiving portion, serves as a guide portion.

According to the third invention, by making efficient use of the rib of the housing, the electric wiring can be guided to the loop receiving portion. Since it is not a structure with a separate member serving as a guide portion, the slack portion of the electrical wiring can be uniformly accommodated without increasing the number of components or the weight.

The fourth invention is an electric power tool of the second or third invention, wherein a sliding member is provided on the guide portion to increase the slidability with respect to the electrical wiring.

According to the fourth invention, the slack part of the electric wiring can be guided even more smoothly and more securely to the loop receiving portion.

In the fifth invention is an electrically driven working device of any of the first to fourth invention, wherein on the housing of Stromzuführabschnitts a leg portion is provided for parking, wherein an interior of the leg portion is used as a loop receiving portion.

According to the fifth invention, the lower portion of the Stromzuführabschnittsgehäuses serves as a leg portion for parking the electrically driven implement on the ground, etc., so that a part with a comparatively large amount of space can be effectively used as a loop receiving portion. The part provides for a enough space for the loop receiving section and can be used as another leg section.

In the sixth invention is an electrically driven working device of any of the first to fifth invention, wherein the electric motor is a brushless motor.

According to the sixth invention, the working portion can be made compact, and since a brush change is unnecessary, the maintainability of the electrically driven working apparatus also improves.

Brief description of the figures

Show it:

1 an overall perspective view of an electrically powered working device according to an embodiment of the present invention;

2 a cross-sectional view of the essential parts of a working section;

3 a cross-sectional view of the essential parts of a Stromzuführabschnitts; the view shows a state of adjustment in shortening direction of the operating rod. In the view, a state is shown in which the loop shape of the electrical wiring has increased and its flaccid part has been picked up.

4 a cross-sectional view of the essential parts of a Stromzuführabschnitts; the view shows a state of adjustment in the extension direction of the operating rod. In the view, a state is shown, wherein the electrical wiring has been pulled toward the working section and the loop shape has been reduced.

Embodiment of the invention

In the following, an embodiment of the present invention based on the 1 to 4 to be discribed. In the present embodiment, as an example of an electric power tool 1 a brushcutter (grass cutter) shown. As in 1 shown has the electrically driven implement 1 a front working section 10 , a rear Stromzuführabschnitt 20 and one of the two coupling control rods 30 on. The working section 10 points as in 2 shown a work section housing 11 with a left and right half, an electric motor 12 as a drive source, a reduction gear 13 with a drive-side gear 13a and a driven side gear 13b , an output shaft 14 and a cutting element holder 15 on. The electric motor 12 is a brushless DC motor and is approximately in the middle of the working area housing 11 added. At an output shaft 15 of the electric motor 12 is a cooling fan 16 appropriate. By the cooling fan 16 when starting the electric motor 12 rotates integrally with this, outside air is in the interior of the working section housing 11 passed, and by this outside air (engine cooling air) is the electric motor 12 cooled.

The rotational power of the electric motor 12 gets on the reduction gear 13 lowered and to the output shaft 14 output. At the output shaft 14 is the cutting element holder 15 appropriate. On the cutting element holder 15 a cutting element is attached. In the view, a state is shown, wherein as a cutting element two nylon cords 17 are attached. On the cutting element holder 15 can replace the nylon cords 17 also three radially projecting plastic knives or a round metal knife can be attached.

As in 1 shown is the rear part of the cutting element holder 15 in a region corresponding to about half its circumference, by a cutting element cover 18 covered. This cutting element cover 18 Prevents cut grass from being thrown at the user. The cutting element cover 18 is at the work section housing 11 stored. At the work section housing 11 is in addition to the cutting element cover 18 also a front protection 19 appropriate. The front protection 19 protrudes opposite to the cutting element cover 18 to the front. By attaching the front protection 19 to a hedge or the like and horizontally moving the working section 10 can be done in a swift way a so-called shape cut.

At the rear portion of the work section housing 11 is a bar connection section 11a intended. The front end portion of the operating rod 30 is in the bar connection section 11a plugged in and attached. The working section 10 is above the bar connection section 11a to the front section of the operating rod 30 coupled. At the operating rod 30 it is an elongate lightweight aluminum-steel tube, which in the present embodiment, as in 1 shown slightly curved from top to bottom. As shown, the operating rod is 30 on the side of the front section (the side of the work section 10 ) is gently curved downwards in a dogleging direction, while it is gently curved at its rear in a direction of the ridge-shaped bump. By the operating rod 30 gently curved from top to bottom, can also be a user of lesser Body size the working section 10 use in the correct posture.

At the rear section of the operating rod 30 is a power supply section 20 stored. The details of the power supply section 20 are in 3 and 4 shown. The power supply section 20 has a power supply section housing 21 with a left and right half up. At the rear portion of the power supply section housing 21 is a battery application section 22 provided for attaching a battery pack B. At the power supply section housing 21 is a control device 23 provided with a current source circuit for controlling the power supply by the battery pack B and a control circuit for operation control of the electric motor 12 includes.

At the front section of the power supply section 20 is a user-held grip section 50 intended. At the front section of the handle section 50 is an operating section 40 intended. The grip section 50 is integral with the Stromzuführabschnittsgehäuse 21 of the power supply section 20 intended. At the grip section 50 is an anti-slip section 50a provided that prevents slipping when the handle portion is held by the user. In the present embodiment, the anti-slip portion is 50a formed such that the surface of the handle portion 50 coated with a rubber sheet (elastomeric resin layer). To the front section of the handle section 50 is integrally an actuator section housing 41 of the operating section 40 coupled. At the operating section 40 are a deduction 42 , a locking lever 43 , a control panel 44 and a rod locking portion 45 intended. If with the fingertip of the hand holding the grip section 50 holds, the deduction below 42 pulled up (to the switch-on), the electric motor starts 12 , and the cutting element rotates.

A locking lever 43 that is on top of the opposite side of the trigger 42 is arranged, is an operating lever with the function, the trigger 42 to lock in the OFF position, with the trigger 42 can only be pulled to the switch-on when the locking lever 43 tilted down. In a state where the locking lever 43 not tilted down, the trigger can 42 not be pulled to the switch-on, which prevents accidental operation of the trigger.

A control panel 44 includes a switch portion having a start switch and a reverse switch, a lighting portion for displaying the power mode (the rotation speed) of the electric motor 12 and a display section having a luminous portion that lights up when the electric motor 12 turns in the opposite direction. In a state where the start switch of the switch section is turned on, there is a turn-on operation of the trigger 42 possible, so that the electric motor 12 starts. When the reversing switch is turned on when the start switch is turned on, the electric motor rotates 12 in the opposite direction. By reversing the electric motor 12 Can be easily removed on the cutting element adhering grass or the like. When the reversing switch is turned on, the display section lights up to let the user know that the cutting element is rotating in the reverse direction. The power mode of the electric motor 12 can be switched over step by step by pressing and holding the start button. The set power mode is notified to the user by changing the number of light elements of the light section.

The rear section of the operating rod 30 is in a coaxial with the Betätigungsabschnittsgehäuse 41 , Handle section 50 and power supply section 20 provided insertion opening 31 plugged in, and at the rear section of the control rod 30 are the operating section 40 , the handle section 50 and the power supply section 20 stored. The rear section of the operating rod 30 is in the longitudinal direction of the operating rod 30 (Forward-back direction) displaceable in the insertion opening 31 introduced. By moving the operating rod 30 in relation to the insertion opening 31 in the longitudinal direction, the distance between the working section 10 and the power supply section 20 be changed, resulting in virtually the length of the operating rod 30 can be adjusted.

At the front portion of the Betätigungsabschnittsgehäuses 41 is the bar locking section 45 intended. The bar locking section 45 has a one-piece at the front portion of the Betätigungsabschnittsgehäuses 41 provided cylindrical locking section 41a and a locking sleeve 45a on top of the locking section 41a in its inner circumference absorbs. The operating rod 30 becomes in the inner periphery of the locking portion 41a introduced. At the locking section 41a is formed in the axial direction of a slot, and it is provided deformable in the radial direction. Between the outer peripheral surface of the locking portion 41a and the inner peripheral surface of the locking sleeve 45a a cam groove and a tapered surface are formed. When the locking sleeve 45a is rotationally actuated by the action of the cam groove, the locking sleeve moves 45a with respect to the locking section 41a in the axial direction. When the locking sleeve 45a displaced in the axial direction, the locking section 41a is pressed by the action of the tapering surface in the direction of diameter reduction and is reversed released due to the elastic force in the expansion direction.

So is the locking sleeve 45a rotated by a certain angle to the locking side, deforms the locking portion 41a by the action of the cam groove and the tapering surface in the direction of diameter reduction, so that the operating rod 30 is detected. By locking using the locking section 41a becomes the operating rod 30 locked, so that they can no longer shift in the longitudinal direction. By locking the operating rod 30 becomes the distance between work section 10 and power supply section 20 fixed. Will the locking sleeve 45a on the other hand turned by a certain angle to the unlocking, deforms the locking section 41a elastic in the expansion direction, so that the detection of the operating rod 30 loosens, causing the operating rod 30 in the longitudinal direction is adjustable in position. By pushing in and pushing out the operating rod 30 in relation to the insertion opening 31 can the distance between working section 10 and power supply section 20 be adjusted as desired within a certain range.

The operating rod 30 is through an inner circumferential bore 41 aa of the locking section 41a at the front portion of the insertion opening 31 and through a guide sleeve 32 at the rear end portion of the control rod 30 is mounted, without rattling in the radial direction in the insertion opening 31 stored displaceable in the longitudinal direction. At the power supply section housing 21 is a cylindrical rib 21a intended. The rear section of the insertion opening 31 is through the rib 21a divided. The guide sleeve 32 is in relation to the rib 21a held without reaming in the radial direction displaceable in the axial direction. At the front section and at the rear section of the cylindrical rib 21a each are a front stopper portion projecting toward the inner peripheral side 21b and rear stop section 21c intended. As in 3 shown, the guide sleeve passes 32 in contact with the rear stop section 21c , so that the reverse position of the operating rod 30 in relation to the insertion opening 31 is restricted. As in 4 shown, vice versa passes the guide sleeve 32 in contact with the front stop section 21b , so that the advance position of the operating rod 30 in relation to the insertion opening 31 is restricted. Thus, the plug over which the guide sleeve 32 between the front abutment portion 21b and the rear stopper portion 21c is movable, the amount of adjustment of the operating rod 30 ,

As in 1 is shown at the front of the bar locking section 45 the loop-shaped front handle 51 on the operating rod 30 stored. When the user with one hand the front handle 51 and the handle section with the other hand 50 he can hold the electrically driven implement 1 operate in a stable position. By unlocking the rod locking section 45 and changing the practical length of the operating rod 30 can the distance between the front handle 51 and the handle portion 50 be changed in adaptation to the stature of the user, whereby the operability and good handling of the electrically driven implement 1 be ensured.

On the inner peripheral side of the operating rod 30 is electrical wiring 60 misplaced the electric motor 12 of the working section 10 and the controller 23 of the power supply section 20 connects electrically. The electrical wiring 60 contains three wires connecting the electric motor 12 supply electricity. Because by adjusting the practical length of the operating rod 30 the distance between working section 10 and power supply section 20 is adjustable, is connected to the electrical wiring 60 a loop circulation section R is provided, which is once looped in adaptation to the Verstellmenge.

In the present embodiment, the loop circulation section R is the electric wiring 60 set for the part that extends beyond the rear end section (guide sleeve 32 ) of the operating rod 30 into the power supply section housing 21 is pulled. At the rear portion of the power supply section housing 21 is a loop receiving section 27 provided for receiving the loop circulation section R. The loop receiving section 27 corresponds to the space passing through the wall portion of the power supply housing 21 and the rib is divided. At the rear portion and lower portion of the power supply section housing 21 a part is provided which projects downwards and as a leg section 21d serves. By the leg section 21d and the cutting element cover 18 of the working section 10 can be brought into contact with the ground, the electrically driven implement 1 be placed in a stable position on the floor or the like. The inside of the part, the leg section 21d corresponds, is a comparatively large space. In the present embodiment, this space becomes a loop receiving portion 27 for forming the loop circulation portion R of the electric wiring 60 used.

The loop receiving section 27 is with respect to the direction of movement of the operating rod 30 at a position laterally (in the present embodiment, down) offset on the underside of the Stromzuführabschnittsgehäuses 21 intended. As in 3 and 4 As shown, the loop circulation section R of the electric wiring runs 60 in the loop receiving section 27 looped around. As shown, the loop circulation section R becomes the electric wiring 60 U-shaped. The loop circulation section R is viewed from the front (in FIG 3 and 4 in the orthogonal direction) an intersection. The part crossing from the front is viewed from the front or the rear to the left or right (in 3 and 4 orthogonal to the paper surface).

At the back of the rib 21a covering the rear section of the insertion opening 31 divided, is a guide section 24 provided the electrical wiring 60 in the loop receiving section 27 leads. In the present embodiment, as a guide portion 24 a wall portion is provided which is inclined in a direction of displacement as far down as the side of the rear portion. If the operating rod 30 in the insertion opening 31 is retracted to the operating rod 30 To shorten practically, the electrical wiring shifts 60 , as in 3 shown by the white arrow (3) to the rear, causing it to abut the guide section 24 passes and evenly to the loop receiving section 27 to be led. By the electrical wiring 60 through the guide section 24 even to the loop receiving section 27 is guided and in contact with the rear wall section 21e reaches, the loop shape of the loop circulation section R increases evenly. By enlarging the loop shape of the loop circulation section R, slack in the electrical wiring 60 behind the rear end section (guide sleeve 32 ) of the operating rod 30 prevents, and thus pinching the same.

The electrical wiring 60 is behind the rear end section of the control rod 30 (Front in pulling direction of the electrical wiring 60 ) and behind the guide section 24 through a wire-holding section 25 held on the Stromzuführabschnittsgehäuse 21 is provided. In the present embodiment, as the wire holding portion 25 in a part of the rib of the power supply section housing 21 a slot provided. The electrical wiring 60 is by pushing into this wire holding section 25 fixed. Between the wire holding section 25 and the rear end of the operating rod 30 is the loop-shaped loop circulation section R of the electrical wiring 60 educated.

As in 3 shown shifts in practical shortening of the operating rod 30 and reducing the distance between work sections 10 and power supply section 20 the electrical wiring 60 around that amount backwards, as in 3 shown by the white arrow (3), and is returned to the loop receiving portion 27 pushed, so that the loop circulation section R extends and loops enlarged. If, on the other hand, as in 4 shown, the operating rod 30 practically extended and the distance between working section 10 and power supply section 20 is increased, the electrical wiring 60 , as in 4 shown by the white arrow (4) to this amount to the working section 10 pulled so that the loop circulation section R becomes shorter and looped smaller. By the practical adjustment of the length of the operating rod 30 Thus, the loop shape of the loop circulation portion R at the loop receiving portion 27 enlarged or reduced. By in the present embodiment, a comparatively large space as a loop receiving portion 27 is used, the loop circulation section R can be looped with a comparatively small curvature.

At the upper part of the rib 21a covering the rear section of the insertion opening 31 divided, is the control device 23 mounted in the form of a rectangular plate. The electrical wiring 60 is with the control device 23 connected. About the electrical wiring 60 becomes the electric motor 12 from the controller 23 , which contains the power source circuit, powered. In addition, the controller detects 23 over the electrical wiring 60 Information on induced voltage applied to the coil of the electric motor 12 is produced. The control device 23 performs calculation processing for the state of the electric motor based on this motor information 12 (Rotation state, etc.) and supplies the electric motor 12 accordingly with electricity. As mentioned above, is at the rear portion of the Stromzuführabschnittsgehäuses 21 the battery application section 22 provided for attaching the battery pack B. As in 1 is shown, power from that at the battery application section 22 attached battery pack B via wires (not shown) to the power source circuit of the controller 23 directed.

As already mentioned, the electrical wiring 60 through the wire-holding section 25 with respect to the power supply section housing 21 fixed. So even if the operating rod 30 in relation to the insertion opening 31 is adjusted in position, the electrical wiring moves 60 between the wire holding section 25 and the controller 23 not, and their circulation path remains unchanged. That the circulation path of the electrical wiring 60 between the wire holding section 25 and the controller 23 not from the position adjustment of the operating rod 30 is also contributed, that the loop shape of the loop circulation section R at the loop receiving portion 27 evenly larger or smaller.

According to the present embodiment having the above construction, the distance between working portion becomes 10 and power supply section 20 changed when the bar locking section 45 loosened towards the unlocking side and the practical length of the operating rod 30 is adjusted, which is why the electrical wiring 60 practically must be provided with a Verbläungsungs- and shortening function. In the present embodiment, the loop circulation section R is at the power supply section 20 set the electrical wiring 60 practically equips with a limbering and shortening function. In this loop circulation section R, the electric wiring runs 60 even with a single crossing in a loop shape. The loop circulation section R is in the loop receiving section 27 behind at the bottom of the control rod 30 added. The practical lengthening and shortening of the electrical wiring 60 is achieved by the loop circulation section R loops enlarged and reduced.

The slacking (posing) of electrical wiring 60 caused by the length adjustment of the operating rod 30 occurs completely from the loop circulation section R at the loop receiving section 27 absorbs and therefore does not occur in other places. For this reason, there is no problem that the thrown (slackened) electrical wiring 60 between the rear end portion (guide sleeve 32 ) of the operating rod 30 and the power supply section housing 21 is trapped. Because the electrical wiring 60 without such trapping is not subject to strong resistance to movement, the operating rod 30 until it touches the rear stop section 21c be moved so that the intended adjustment of the operating rod 30 can be achieved.

In the present embodiment, since the loop circulation portion R of the electrical wiring 60 With a loop shape of comparatively small curvature, at least once crossing, it is particularly suitable for circulating electrical wiring having a comparatively large bending resistance in which a plurality of wires such as power supply wires or signal wires are bundled into a lead.

In the exemplary embodiment is also behind the operating rod 30 the guide section 24 intended. If the operating rod 30 is practically adjusted in the shortening direction, the electrical wiring 60 through this guide section 24 safely to the loop receiving section 27 guided, reducing the likelihood of posing behind the operating rod 30 can be reduced, so that pinching the electrical wiring 60 through the operating rod 30 even safer can be prevented.

Various changes can be made to the above-described embodiments. For example, it has been shown as an example that the loop circulation section R in the loop accommodating section 27 by once crossing the electrical wiring 60 revolves, but can also be done as a coil a two or more times crossing.

As a guide section 24 for guiding the electrical wiring 60 towards the loop receiving section 27 For example, an inclined wall surface (guide plate) has been shown as an example, but a structure having an annular portion (guide ring), a tubular portion (guide sleeve) or a roller may be used instead. It is also possible at the guide section 24 for increasing the lubricity with respect to the electrical wiring 60 as a sliding member to stick a high gliding path or to apply a lubricant such as grease on it, so that the electrical wiring 60 without resistance in the loop receiving section 27 can be performed.

As an example, a structure has been shown, wherein the loop receiving portion 27 with respect to the direction of movement (axial direction) of the operating rod 30 arranged offset to the bottom, but the loop receiving portion may be arranged offset to the top. It is also possible, the loop receiving portion with respect to the direction of movement of the operating rod 30 (in 3 and 4 the direction orthogonal to the paper). In addition, a structure is possible, wherein the loop receiving portion at the rear part in the direction of movement of the operating rod 30 is arranged.

Also, as an example, a structure has been shown, with the practical length of the operating rod 30 by displacing the rear portion of the operating rod 30 with respect to the power supply section 20 is adjusted, but the exemplary circulation structure of the electrical wiring 60 be applied to a structure, wherein the practical length of the operating rod is adjustable by the front portion of the operating rod with respect to the working section 10 is relocated. In this case, an identical loop receiving portion is on the working portion housing 21 is provided, and the loop circulation portion of the electrical wiring runs at least once crossing in the loop receiving portion, whereby the same effect can be achieved.

As an example of the electrically driven implement 1 For example, a so-called brushcutter has been presented, but a wide application to other implements such as lawnmowers, leaf blowers, vacuum cleaners and the like is possible where the user performs a certain work on the ground in a standing posture.

In the embodiment described above, a battery (DC power source) has been exemplified as the power source, but the power source may be an AC power source. If, as in the example, a battery is used as the power source, is on Stromzuführabschnitt 20 the battery application section 22 is provided, but when an AC power source is used as a power source, for example, a connection for connecting a power cable is provided at the Stromzuführabschnitt or a rectifier incorporated therein.

In the embodiment described above, three bundled power supply wires have been exemplified as wiring, but the wiring may also be signal wires that conduct signals to the controller. For example, the wiring may also be detection signals from a sensor that detects the rotational state (position) of the engine. Thus, the present invention is also applicable to signal wires transmitting different signals.

LIST OF REFERENCE NUMBERS

1

electrically driven implement

10

working section

11

Working section housing

11a

Rod connecting portion

12

electric motor

13

Reduction gear

13a

drive-side gear

13b

output-side gear

14

output shaft

15

Cutter holder

16

cooling fan

17

nylon cord

18

Cutter cover

19

front protection

20

power supply section

21a

rib

21b

front stop section

21c

rear stop section

21d

leg section

21e

Rear wall portion

22

Battery mounting portion

23

control device

24

guide section

25

Wire holding section

27

Loop recording section

B

battery Pack

30

operating rod

31

insertion

32

guide sleeve

40

actuating section

41

Operating section housing

41a

Determining section

41 aa

Inner peripheral bore

42

deduction

43

locking lever

44

Control panel

45

Staff locking section

45a

locking sleeve

50

handle portion

50a

Anti-slip section

51

front handle

60

W wire

R

Loop circulation section

Task: In a brushcutter in which by relative displacement of an operating rod whose practical length is adjustable, electrical wiring, which is laid on the inner peripheral side of the operating rod, raised by the relative displacement of the operating rod. In the prior art, there is a risk that the raised part of the electric wiring is pinched and damaged at a rear end portion of the operating rod. The present invention is intended to ensure that the raised portion of the electrical wiring is not pinched on the operating rod.

Release means: on a power supply section housing ( 21 ) is electrical wiring ( 60 ), which consists of a rear section of an operating rod ( 30 ) is pulled from a wire holding section ( 25 ) and running in a loop shape at least once crossing in a loop receiving portion ( 27 ) between the wire-holding section ( 25 ) and the rear section of the operating rod ( 30 ) around. By a loop circulation section (R) of the raised part is absorbed and not pinched at the rear portion of the operating rod.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2014-117249 [0004]

Claims (6)

An electric power tool having a working portion in which an electric motor is accommodated as a power tool driving source, a Stromzuführabschnitt for supplying the electric motor with power and a tubular operating rod, at the front part of the working portion is mounted and at the rear portion of the Stromzuführabschnitt is mounted, wherein through the inside of the operating rod electrical wiring between the working portion and the Stromzuführabschnitt is laid and an end portion of the operating rod with respect to the housing of the working portion or the Stromzuführabschnitts is mounted displaceably in the longitudinal direction and a distance between the working portion and the Stromzuführabschnitt is adjustable, wherein Housing the working portion or the Stromzuführabschnitts a wire holding portion that holds the electrical wiring, pulled from the end portion of the operating rod into the interior of the housing is provided, and a loop-receiving portion is provided, around which the electrical wiring between the wire-holding portion and the end portion of the operating rod loops around, wherein the electrical wiring on the loop-receiving portion circulates at least once crossing in a loop shape. The power tool of claim 1, wherein the loop receiving portion is laterally offset with respect to the housing of the operating rod with respect to the displacement direction, and wherein a guide portion is provided in front in a direction of pulling out the electrical wiring with respect to the end portion of the operating rod the electrical wiring drawn from the operating rod end portion leads to the loop receiving portion. Electrically driven working device according to claim 2, wherein as a guide portion provided on the housing rib to the loop receiving portion is inclined. An electric power tool according to claim 2 or 3, wherein on the guide portion, a sliding member for increasing the slidability is provided with respect to the electrical wiring. An electric power tool according to any one of claims 1 to 4, wherein a leg portion for parking is provided on the housing of the power supply portion, wherein an inner space of the leg portion is used as a loop receiving portion. An electric power tool according to any one of claims 1 to 5, wherein the electric motor is a brushless motor.

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