CN206165188U - Electronic operation machinery - Google Patents

Abstract

The utility model provides an electric working machine. In the brush cutting machine that can adjust the substantial length of the operating rod by relative displacement, the electrical wiring arranged on the inner peripheral side of the operating rod becomes slack due to the relative displacement of the operating rod. Conventionally, looseness of the electrical wiring may cause it to be caught at the rear end of the operating rod and be damaged. The utility model prevents the slack part of the electric wiring from being clamped by the operating rod. Utilize the wiring holding part (25) to keep the electric wiring (60) pulled out from the end of the operating lever (30) in the power supply part casing (21), and it is arranged on the wiring holding part (25) and the operating lever (30). ) in the ring housing portion (27) between the ends of the wound into a ring that crosses at least once. Use the annular wrap (R) to absorb slack so that it does not get caught at the end of the lever.

Description

Electric working machine

technical field

The utility model relates to an electric bush cutting machine, which is an electric operating machine with an electric motor as a driving source.

Background technique

An electric working machine such as a so-called bush cutter has a structure in which a working unit is supported on a front portion of a vertically long operating lever and a power supply unit is supported on a rear portion thereof, as disclosed in the following patent documents. The working unit has a structure in which an electric motor as a drive source, a reduction gear train, and the like are built in a working unit housing. A cutting tool such as a circular cutter or a cutting wire is attached to the output shaft of the working unit. The power supply unit is a part that is equipped with a rechargeable battery pack as a power source or connected with a commercial 100V AC power supply line to supply power to the work unit. In the case of the former battery type, the power supply unit has such a Structure: A controller including a power supply circuit and the like is built in the power supply case, and a battery mounting portion for mounting a battery pack as a power supply is provided.

The operation part casing and the power supply part casing are combined by an operating lever. Lightweight pipes such as aluminum alloy pipes are used for the operating lever. Electric wires such as a power supply line for supplying power to the working unit via the power supply unit and signal lines for controlling the operation of the electric motor are arranged between the working unit and the power supply unit via the inside of the operating lever. In addition, in such an electric working machine, there is provided a structure having an adjustment function capable of adjusting the length of the operating lever according to the physique of the user. In many cases, the length adjustment mechanism has a structure in which the rear portion of the operating rod is supported by the power supply unit housing so that its position can be adjusted in the longitudinal direction, and the supporting position is changed by adjusting the position of the rear portion of the operating rod relative to the power supply unit housing. Instead, the substantial length of the operating rod can be adjusted.

prior art literature

patent documents

Patent Document 1: Japanese Unexamined Patent Publication No. 2014-117249

Utility model content

Problems to be solved by the utility model

Conventionally, there have been the following problems to be solved with respect to the length adjustment mechanism of the control lever. For example, when the adjustment is made in the direction of shortening the length of the operation lever, the position adjustment is performed in the direction in which the rear part of the operation lever enters the housing of the power supply part to reduce the distance between the power supply part and the working part. . Therefore, the electric wiring arranged inside the operation rod has a surplus in the length direction in the power supply unit housing by an amount corresponding to the substantially shortened operation rod. In the past, in this case, the spare part of the electrical wiring may be caught between the rear end of the operating lever and the power supply part housing and be damaged. The corresponding amount, therefore, there is a problem that the adjustment amount thereof becomes small.

The object of the present invention is to prevent the electrical wiring from being caught as in the past even when the operation lever is adjusted in the direction of shortening the length.

solutions to problems

The above-mentioned problems are solved by the following technical means. The first technical solution is an electric working machine, which includes: a working part, which incorporates an electric motor as a driving source; a power supply part, which supplies electric power to the electric motor; The working part is supported on the front part, and the power supply part is supported on the rear part. Electric wiring is arranged between the working part and the power supply part through the operating lever. direction, so that the distance between the working part and the power supply part can be adjusted. In the first technical means, there is a structure in which: the housing of the operation unit or the power supply unit is provided with: a wiring holding unit for holding the electrical wiring pulled out from the end of the operating lever into the housing; and a ring storage unit. , which winds the electrical wiring in a ring shape between the wiring holding portion and the end of the operating rod. In the first aspect, the electrical wiring is wound in a ring shape that intersects at least once in the loop storage portion.

According to the first technical solution, when the end of the operating rod is relatively displaced in the direction of entering the housing of the working part or the power supply part and is adjusted to the side where the operating rod is substantially shortened, the amount of shortening of the electric wiring corresponds to The slack generated in this way is displaced in the direction of increasing the size of the ring in the ring storage portion, and there is no margin (slack portion) sandwiched between the operation lever and the housing. Since the electric wiring pulled out from the end of the operating lever is wound in a ring shape that intersects at least once between the wiring holding portion with respect to the case and the end of the operating lever, the slack portion of the electric wiring makes the It moves in the direction where the ring shape becomes larger and is absorbed smoothly. The ring storage part functions as a space (space part) for absorbing the slack in the electrical wiring when the adjustment is made to the side that substantially shortens the operation lever (the side that reduces the distance between the working part and the power supply part). Function. Since the slack of the electrical wiring is absorbed in the ring housing portion, it is possible to prevent the electrical wiring from being caught between the end portion of the operation lever and the case. Conversely, when the end portion of the operating lever is displaced in a direction to be relatively pulled out from the case in order to substantially lengthen the operating lever (to increase the distance between the working portion and the power supply portion), the electric wiring is drawn into the operating lever and Shift in the direction to make the ring shape of the ring storage section smaller.

According to the first aspect, in the electric working machine according to the second aspect, the ring storage portion is arranged to be offset laterally with respect to the displacement direction of the control lever relative to the case, and at the end of the electric wiring relative to the control lever A guide portion is provided in front of the pull-out direction, and the guide portion is used to guide the electric wiring pulled out from the end of the operating lever to the ring storage portion.

According to the second technical solution, when the operation lever is substantially shortened, the slack part of the electrical wiring is guided in a direction of displacement toward the ring storage part through the guide part, thereby making the ring accommodating. The loop shape of the electrical wiring in the storage portion is smoothly shifted in a direction in which it becomes larger, and the slack is smoothly absorbed.

According to the second aspect, in the electric working machine according to the third aspect, the rib provided on the casing is formed as a guide portion by inclining toward the ring housing portion side.

According to the third aspect, the ribs of the housing can be effectively used to guide the electric wiring to the ring housing portion. Since the guide portion is not constituted by a separate member, the slack portion of the electrical wiring can be smoothly absorbed without increasing the number of parts and reducing the weight.

According to the second or third technical means, in the electric working machine according to the fourth technical means, a sliding member for improving slidability with respect to the electric wiring is provided on the guide part.

According to the fourth aspect, it is possible to more smoothly and reliably guide the slack of the electrical wiring to the loop housing portion.

According to any one of the first to fourth aspects, in the electric working machine according to the fifth aspect, the housing of the power supply unit is provided with legs for placement, and the internal space of the legs is used as a ring for storage. department.

According to the fifth aspect of the invention, it is possible to effectively use the part which is a relatively large free space provided in order to make the lower part of the power supply part housing function as a leg part when the electric working machine is placed (installed) on the floor or the like. As a ring storage department. It is possible to make it function as a leg while securing a sufficiently large space as a loop storage unit.

According to any one of the first to fifth aspects, in the electric working machine according to the sixth aspect, the electric motor is a brushless motor.

According to the sixth aspect, since it is possible to reduce the size of the working portion and it is not necessary to replace the brushes, the maintainability of the electric working machine can be improved.

Description of drawings

FIG. 1 is an overall perspective view of an electric working machine according to an embodiment of the present invention.

Fig. 2 is a longitudinal sectional view of the working unit.

Fig. 3 is a longitudinal sectional view of a power supply unit. Fig. 3 shows a state in which the operation lever has been adjusted in the direction of shortening. FIG. 3 shows a state where the loop shape of the electrical wiring is enlarged and the slack is absorbed.

Fig. 4 is a longitudinal sectional view of a power supply unit. Fig. 4 shows a state in which the adjustment is made in the direction of the extension lever. FIG. 4 shows a state in which the electric wiring is pulled toward the working part and the ring shape becomes smaller.

Explanation of reference signs

1. Electric operating machinery (shrub cutting machine);

10. Operation Department;

11. The shell of the operation part, 11a, the connecting part of the rod;

12. Electric motor;

13. Reduction gear train, 13a, driving side gear, 13b, driven side gear;

14. Output shaft;

15. Cutting tool holder;

16. Cooling fan;

17. Nylon rope;

18. Cutting tool cover;

19. Front protection parts;

20. Power supply department;

21. Shell of the power supply unit;

21a, rib, 21b, front stop, 21c, rear stop, 21d, leg;

21e, the rear wall;

22. Battery installation department;

23. Controller;

24. Guidance Department;

25. Wiring maintenance department;

27. Ring storage department;

B. Battery pack;

30. Operating lever;

31. Through hole;

32. Guide sleeve;

40. Operation department;

41. Operating part shell; 41a, constraining part; 41aa, inner peripheral hole;

42. Trigger lever;

43. Lock the closing lever;

44. Operation panel;

45, the locking rod; 45a, the locking sleeve;

50, handle portion; 50a, anti-slip portion;

51. Front handle;

60. Electrical wiring;

R, ring winding part.

detailed description

Next, an embodiment of the present invention will be described based on FIGS. 1 to 4 . In this embodiment, a so-called brush cutter (lawn mower) is illustrated as an example of the electric working machine 1 . As shown in FIG. 1 , the electric working machine 1 includes a working unit 10 on the front side, a power supply unit 20 on the rear side, and an operation lever 30 combining them. As shown in FIG. 2 , the working part 10 includes a working part housing 11 with 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 side gear 13a and a driven side gear 13b, and an output gear. Shaft 14 and cutting tool holder 15. The electric motor 12 is a DC brushless motor, and is built in approximately the center of the working unit casing 11 . A cooling fan 16 is attached to the output shaft of the electric motor 12 . When the electric motor 12 is activated, the cooling fan 16 rotates integrally, introduces outside air into the working unit housing 11 , and cools the electric motor 12 with the outside air (motor cooling air).

The rotational output of the electric motor 12 is decelerated 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 attached to the cutting tool holder 15 . The figure shows a state where two nylon cords 17 are attached as a cutting tool. Three resin blades or circular metal blades similarly protruding radially can be attached to the cutting tool holder 15 instead of the nylon cord 17 .

As shown in FIG. 1 , the cutting tool holder 15 is covered with a cutting tool cover 18 in a substantially half-circumferential rear area. The cutter cover 18 can prevent the cut grass from flying toward the user. The cutting tool cover 18 is supported on the working unit housing 11 . A front protector 19 is attached to the working unit housing 11 in addition to the cutting tool cover 18 . The front protector 19 protrudes forward opposite to the cutter cover 18 . By causing the front protector 19 to touch a screen wall (Japanese: ブロック塀) or the like and moving the working unit 10 laterally, so-called edge trimming (Japanese: 切剪り) can be performed quickly and neatly.

A rod connection portion 11 a is provided at the rear of the working portion housing 11 . The front-end|tip part of the operation rod 30 is inserted and fixed in this rod connection part 11a. The working unit 10 is coupled to the front portion of the operating lever 30 via the lever connecting portion 11a. The operating rod 30 is a light-weight pipe made of a vertically long aluminum steel pipe, and in the present embodiment, a member that is gently curved upward and downward as shown in FIG. 1 is used. As shown in the figure, the operation lever 30 is gently curved in a concave downward direction on the front side (working part 10 side), and is gently curved in a mountain-shaped direction on the rear side. Since the operation lever 30 is gently bent up and down, even a short user can use the working unit 10 in an appropriate posture.

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

A handle portion 50 for the user to hold is provided on the front portion of the power supply portion 20 . The operation part 40 is provided in the front part of the handle part 50. As shown in FIG. The handle portion 50 is integrally provided on the power supply unit casing 21 of the power supply unit 20 . The grip part 50 is provided with an anti-slip part 50a for anti-slipping when the user grips it. In the present embodiment, a rubber sheet (elastomer resin layer) is coated on the surface of the handle portion 50 to form the anti-slip portion 50a. The operation part housing 41 of the operation part 40 is integrally joined to the front part of the handle part 50 . The operation part 40 is provided with a trigger lever 42 , a lock closing lever 43 , an operation panel 44 and a lock lever part 45 . When the trigger lever 42 disposed on the lower side is pulled upward (on the opening side) with the fingertip of the hand holding the handle portion 50 , the electric motor 12 is activated to rotate the cutting tool.

The locking and closing lever 43 arranged on the upper side opposite to the trigger lever 42 is an operation lever having a function of locking the trigger lever 42 in the closed position, and can be turned only when the locking and closing lever 43 is tilted downward. The trigger lever 42 is pulled to the opening side for operation. Since the trigger lever 42 cannot be operated to the opening side without tilting the lock closing lever 43 downward, it is possible to prevent erroneous operation of the trigger lever 42 .

The operation panel 44 includes a switch unit having a start switch and a reverse switch, a light emitting unit for displaying the output mode (rotational speed) of the electric motor 12 , and a display unit having a light emitting unit that emits light when the electric motor 12 is reversed. In the state where the start switch of the operation switch unit is turned on, the turn-on operation of the trigger lever 42 is effective, and the electric motor 12 is started. When the forward-reverse switching switch is turned on and operated in the on state of the start switch, the electric motor 12 reverses. By reversing the electric motor 12, it is possible to easily untangle and remove grass and the like that are tangled up on the cutting tool. When the forward and reverse switching switch is turned on and operated, the display part emits light to inform the user that the cutting tool is in the reversed state. The output mode of the electric motor 12 can be switched stepwise by pressing and holding the start switch. By changing the number of light emitted by the light emitting unit, it is possible to notify the user of the switched output mode.

The rear portion of the operating lever 30 is inserted into the through hole 31 coaxially provided in the operating portion housing 41, the handle portion 50, and the power supply portion 20, and the operating portion 40, the handle portion 50, and the power supply portion 20 are supported on the rear of the operating rod 30. department. The rear portion of the operating rod 30 passes through the through hole 31 so as to be displaceable relative to the through hole 31 in the longitudinal direction (front-rear direction) of the operating rod 30 . By displacing the operating lever 30 in the longitudinal direction relative to the through hole 31 , the distance between the working unit 10 and the power supply unit 20 can be changed, and the length of the operating lever 30 can be substantially adjusted.

The aforementioned lock lever portion 45 is provided at the front portion of the operation portion housing 41 . The lock lever portion 45 includes a cylindrical restricting portion 41 a integrally provided on the front portion of the operation portion housing 41 and a lock sleeve 45 a that accommodates the restricting portion 41 a on the inner peripheral side. The operation rod 30 penetrates through the inner peripheral side of the restraint part 41a. The restricting part 41a is provided with a slit formed in the axial direction, and is elastically deformable in the radial direction. A cam groove and a tapered surface are formed between the outer peripheral surface of the restricting portion 41a and the inner peripheral side of the lock sleeve 45a. Utilizing the action of the cam groove, when the locking sleeve 45a is rotationally operated, the locking sleeve 45a is displaced in the axial direction with respect to the restricting portion 41a. When the locking sleeve 45a is displaced in the axial direction, the constraining portion 41a is pressed in the diameter-reducing direction by the action of the tapered surface, and on the contrary, the constraining portion 41a is released in the diameter-expanding direction by elastic force.

Therefore, when the locking sleeve 45a is rotated to the locking side by a certain angle, the constraining portion 41a is deformed in a diameter-reducing direction by the action of the cam groove and the tapered surface to constrain the operation lever 30 . The operation lever 30 is locked so as not to be displaced in its longitudinal direction by being restrained by the restraining portion 41a. By locking the operation lever 30, the distance between the working part 10 and the power supply part 20 is fixed. Conversely, when the lock sleeve 45a is rotated to the lock-off side by a certain angle, the constraining portion 41a is elastically deformed in the diameter-expanding direction and the restraint of the operating rod 30 is loosened, whereby the operating rod 30 can be adjusted in its longitudinal direction. Location. The distance between the working part 10 and the power supply part 20 can be adjusted arbitrarily within a certain range by inserting and withdrawing the operating lever 30 into the through hole 31 .

Utilize the front portion of the through hole 31 and the inner peripheral hole 41aa of the constraining portion 41a and the guide sleeve 32 mounted on the rear end portion of the operating rod 30 to support the operating rod 30 so as not to wobble in the radial direction and to be able to move in the through hole 31. Displacement along the length direction. A cylindrical rib 21 a is provided on the power feeding unit case 21 . The rear portion of the through hole 31 is defined by this rib 21a. The guide bush 32 is held so as not to wobble in the radial direction and to be displaceable in the axial direction with respect to this rib 21a. A front stopper portion 21b and a rear stopper portion 21c protruding toward the inner peripheral side are respectively provided at the front portion and the rear portion of the cylindrical rib 21a. As shown in FIG. 3 , the guide sleeve 32 abuts against the rear stopper portion 21 c to restrict the position of the rear end of the operation lever 30 relative to the through hole 31 . On the contrary, as shown in FIG. 4 , the guide sleeve 32 abuts against the front stopper portion 21 b to limit the position of the advancing end of the operating rod 30 relative to the through hole 31 . Therefore, the stroke by which the guide sleeve 32 can move between the front stopper 21 b and the rear stopper 21 c is the adjustment amount of the operating lever 30 .

As shown in FIG. 1 , an annular front handle 51 is supported on the operation lever 30 in front of the lock lever portion 45 . The user can operate the electric working machine 1 in a stable posture by holding the front handle 51 with one hand and the handle portion 50 with the other hand. By changing the substantial length of the operating lever 30 by unlocking the operating lock lever portion 45, the distance between the front handle 51 and the handle portion 50 can be changed in accordance with the user's physique, etc., and the electric working machine 1 can be secured in this point. High workability and good usability.

Electrical wiring 60 electrically connecting the electric motor 12 of the working unit 10 and the controller 23 of the power supply unit 20 is arranged on the inner peripheral side of the operating lever 30 . The electrical wiring 60 includes three power wires for supplying electric power to the electric motor 12 . The electric wiring 60 is provided with a ring-shaped winding portion R that is once wound by an adjustment amount corresponding to the interval between the working portion 10 and the power supply portion 20 that can be adjusted by adjusting the substantial length of the operating lever 30 . Comparing rings.

In the present embodiment, the annular winding portion R of the electric wire 60 is set as a portion pulled out into the power supply unit housing 21 via the rear end portion (guide sleeve 32 ) of the operating lever 30 . A ring housing portion 27 for housing the annular winding portion R is provided at the rear of the power supply unit case 21 . The ring housing portion 27 corresponds to a space portion defined by the walls and ribs of the power supply unit housing 21 . The rear portion and the lower portion of the power supply unit housing 21 are provided with portions that protrude downward and function as leg portions 21d. By grounding the leg portion 21d and the cutting tool cover 18 of the working unit 10, the electric working machine 1 can be placed on the ground or the like in a stable posture. The inside of the portion corresponding to the leg portion 21d has a relatively large free space. In the present embodiment, this free space is used as the ring accommodation portion 27 for forming the ring winding portion R of the electric wiring 60 .

The ring housing portion 27 is provided at a position offset laterally (downward in this embodiment) with respect to the moving direction of the operating lever 30 and is provided on the lower side of the power supply unit housing 21 . As shown in FIG. 3 and FIG. 4 , in the ring housing portion 27 , the ring winding portion R of the electrical wiring 60 is wound in a ring shape. As shown in the figure, the loop winding portion R of the electrical wiring 60 is held in the loop housing portion 27 in a loop shape intersecting once, not a loop shape detoured into a U-shape. The ring wound portion R intersects when viewed from the side (orthogonal direction in FIGS. 3 and 4 ). When viewed from the side, the intersecting portion is shifted left and right (direction perpendicular to the paper surface in FIGS. 3 and 4 ) when viewed from the front or rear.

A guide portion 24 for guiding the electrical wiring 60 into the ring housing portion 27 is provided at the rear portion of the rib 21 a that defines the rear portion of the through hole 31 . In this embodiment, as the guide part 24, the wall surface which inclines in the direction which displaces downward toward the rear part side is provided. When the operating rod 30 is inserted into the through hole 31 and the substantial length of the operating rod 30 is adjusted to be shorter, the electrical wiring 60 is displaced backward as shown by the hollow arrow (3) in FIG. The guide portion 24 is smoothly guided to the ring storage portion 27 . A rear wall portion 21 e constituting a rear wall surface of the power supply unit housing 21 is arranged forward in the guiding direction of the guide portion 24 . When the electric wire 60 is smoothly guided to the ring housing portion 27 by the guide portion 24 and then abuts against the rear wall portion 21e, the ring shape of the annular winding portion R is smoothly enlarged. By enlarging the ring shape of the annular winding portion R, it is possible to prevent the electrical wiring 60 behind the rear end portion (guide sleeve 32 ) of the operation lever 30 from being loose and pinched.

The electric wiring 60 is held by the wiring holding portion 25 provided on the power supply unit housing 21 behind the rear end portion of the operating lever 30 (forward in the pulling direction of the electric wiring 60 ) and behind the guide portion 24 . In the present embodiment, as the wire holding portion 25 , a slit is provided in a part of the rib of the power supply unit case 21 . The electrical wiring 60 is press-fitted and fixed in the wiring holding portion 25 . Between the wire holding portion 25 and the rear end of the operating lever 30 , a ring-shaped ring wound portion R is formed on the electrical wire 60 .

When shortening the substantial length of the operating lever 30 as shown in FIG. As a result of being pushed back into the ring storage portion 27 by an amount corresponding to the decrease in the distance between the working portion 10 and the power supply portion 20 , the toroidal winding portion R becomes longer and its ring shape becomes larger. On the other hand, when the substantial length of the operating lever 30 is lengthened as shown in FIG. As a result of the working portion 10 side being pulled out by an amount corresponding to the increase in the distance between the working portion 10 and the power supply portion 20 , the annular winding portion R becomes shorter and its ring shape becomes smaller. By adjusting the substantial length of the operating lever 30 in this way, the ring shape of the ring winding portion R becomes larger or smaller in the ring storage portion 27 . In the present embodiment, by using a relatively large free space as the ring housing portion 27, the annular winding portion R can be accommodated in a ring shape having a relatively large radius of curvature.

A controller 23 in the shape of a rectangular flat plate is mounted on an upper portion of the rib 21 a defining the rear portion forming the through hole 31 . Electric wiring 60 is connected to this controller 23 . Electric power is supplied to the electric motor 12 from the controller 23 including a power supply circuit via the electric wiring 60 . Furthermore, induced voltage information generated by the coil of the electric motor 12 is acquired in the controller 23 via the electrical wiring 60 . In the controller 23 , calculation processing of the state (rotation state, etc.) of the electric motor 12 is performed based on the motor information, and power is supplied to the electric motor 12 . As described above, the battery mounting portion 22 for mounting the battery pack B is provided at the rear of the power supply unit case 21 . The electric power of the battery pack B mounted on the battery mount 22 as shown in FIG. 1 is supplied to the 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 case 21 by the wiring holding portion 25 . Therefore, even when the position of the operation lever 30 is adjusted with respect to the through hole 31 , the electrical wiring 60 is not displaced between the wiring holding portion 25 and the controller 23 , and its winding path does not change. Between the wiring holding part 25 and the controller 23, the electrical wiring 60 is not affected by the adjustment of the position of the operation lever 30 on the winding path, whereby the ring shape of the annular winding part R is smoothly formed in the ring storage part 27. become larger, and vice versa.

According to the present embodiment constituted as above, when the substantial length of the operation lever 30 is adjusted by loosening the lock lever portion 45 toward the unlocking side, the distance between the working portion 10 and the power supply portion 20 can be changed, so it is necessary to make the electric wiring The 60 is essentially telescoping. In the present embodiment, the power supply unit 20 is provided with an annular winding portion R for substantially providing the electrical wiring 60 with a stretching function. The annular winding portion R is wound into a loop shape in which the electrical wiring 60 crosses itself once. The ring winding portion R is housed in a ring housing portion 27 provided at the rear lower portion of the operating lever 30 . By increasing or decreasing the ring shape of the annular winding portion R, substantial expansion and contraction of the electrical wiring 60 can be realized.

In this way, all the slack (surplus) of the electrical wiring 60 caused by adjusting the length of the operating lever 30 is absorbed by the annular winding portion R in the ring housing portion 27 , and therefore no slack occurs in other locations. Therefore, there is no trouble that a surplus portion (slack portion) of the electric wiring 60 is caught between the rear end portion (guide sleeve 32 ) of the operation lever 30 and the power supply unit case 21 . Since this pinching does not occur and there is no large movement resistance of the electric wiring 60, the operation lever 30 can be easily moved until it abuts against the rear stopper 21c, thereby reliably obtaining The original adjustment amount of the operating lever 30 .

This embodiment is a structure in which the annular winding portion R of the electrical wiring 60 is wound in a ring shape with a relatively large radius of curvature that intersects at least once. Therefore, it is particularly suitable for bundling multiple wirings such as power lines and signal lines into one. It is a strong electrical wiring and is a coil of electrical wiring that has relatively high resistance to bending.

In addition, in the illustrated embodiment, the guide portion 24 is provided behind the operation lever 30 . When the adjustment is made in the direction of shortening the substantial length of the operating lever 30, the electric wiring 60 is reliably guided toward the inside of the ring housing portion 27 by the guide portion 24, so that slack can hardly occur behind the operating lever 30, thereby enabling The electric wiring 60 is more reliably prevented from being caught by the operation lever 30 .

Various changes can be added to the embodiment described above. For example, a structure in which the loop winding portion R of the electrical wiring 60 intersects once in the loop housing portion 27 was exemplified, but a configuration in which the loop winding portion R of the electrical wiring 60 intersects twice or more like a coil may also be employed.

In addition, as the guide part 24 that guides the electric wiring 60 toward the ring housing part 27 , an inclined wall surface (guide plate) is exemplified, but an annular part (guide ring), a cylindrical part (guide sleeve) may be used instead Or the structure of the roller. In addition, by affixing a highly slidable sheet to the guide portion 24 as a sliding member for increasing the slidability with respect to the electric wiring 60, or by applying a lubricant such as grease, the electric wiring 60 can be moved without resistance. Guided toward the inside of the ring housing portion 27 .

Although the structure in which the ring storage part 27 is offset to the lower side with respect to the moving direction (axis direction) of the operation lever 30 is shown as an example, the ring storage part may be arranged in a position offset to the upper side. In addition, the ring storage portion may be arranged sideways (in FIGS. 3 and 4 , a direction perpendicular to the paper surface) with respect to the moving direction of the operating lever 30 . In addition, the ring storage portion may be configured to be arranged behind in the moving direction of the operating lever 30 .

In addition, the structure 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 is exemplified, but the illustrated winding structure of the electric wire 60 can be applied to make the operation rod The structure in which the front side is displaced relative to the working part 10 to adjust its substantial length. In this case, by providing a similar loop storage portion on the working unit case 21, and winding the loop winding portion of the electrical wiring in a loop shape that intersects at least once in the loop storage portion, it is possible to obtain The same effect.

In addition, a so-called bush cutter was exemplified as the electric working machine 1 , but it can be widely applied to working machines such as lawn mowers, blowers, and vacuum cleaners in which users perform predetermined work on the ground, floor surfaces, etc. in a standing posture.

In the above-mentioned embodiment, an example was shown in which the power supply was a battery (DC power supply), but the power supply may also be an AC power supply. In the case of using a battery as the power source as shown in the illustration, the battery mounting part 22 is provided on the power supply part 20. There is a rectification part.

In the above-mentioned embodiment, an example was shown in which three power supply lines are bundled as the wiring passing through the rod, but the wiring may be, for example, a signal line through which a signal flows from the trigger to the controller. In addition, the wiring may be, for example, a detection signal line of a sensor for detecting the rotational state (position) of the motor. Thus, the present invention can also be applied to signal lines through which various signals flow.

Claims (10)

1. An electric working machine, comprising: An operation section having an electric motor built in as a driving source; a power supply section for supplying electric power to the electric motor; and an operating lever, which is in the shape of a tube, supports the working part at the front part, and supports the power supply part at the rear part, Electrical wiring is arranged between the working unit and the power supply unit via the operating lever, the end of which is supported so as to be displaceable in the longitudinal direction relative to the housing of the working unit or the power supply unit. , so that the distance between the working part and the power supply part can be adjusted, it is characterized in that, The electric work machine has such a structure: Inside the shell of the operation part or the power supply part, there are: a wiring holding part for holding the electric wiring pulled out from the end of the operation lever into the housing; and a ring housing portion that winds the electrical wiring in a ring shape between the wiring holding portion and an end portion of the operating lever, The electrical wiring is wound into a loop that intersects at least once in the loop housing portion. 2. The electric working machine according to claim 1, wherein: The ring storage part is arranged laterally offset with respect to the displacement direction of the operation rod relative to the housing, and is provided in front of the pull-out direction of the end part of the operation rod with respect to the electric wiring. and a guide portion for guiding the electric wiring pulled out from the end portion of the operation lever to the ring storage portion. 3. The electric working machine according to claim 2, wherein: The guide portion is formed by inclining a rib provided on the housing toward the ring housing portion side. 4. The electric working machine according to claim 2 or 3, wherein: A sliding member for improving slidability with respect to the electrical wiring is provided on the guide portion. 5. The electric working machine according to any one of claims 1 to 3, wherein: Legs for placement are provided on the casing of the power supply unit, and the inner space of the legs is used as the ring storage unit. 6. The electric working machine according to claim 4, wherein: Legs for placement are provided on the casing of the power supply unit, and the inner space of the legs is used as the ring storage unit. 7. The electric working machine according to any one of claims 1 to 3, wherein: The electric motor is a brushless motor. 8. The electric working machine according to claim 4, wherein: The electric motor is a brushless motor. 9. The electric working machine according to claim 5, wherein: The electric motor is a brushless motor. 10. The electric working machine according to claim 6, wherein: The electric motor is a brushless motor.