JP2009072150A - Cordless horticultural tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cordless horticultural tool that carries out a plurality of operations by one tool and has high general purpose properties and a low noise. <P>SOLUTION: The cordless horticultural tool (attachment type mower) 1 includes a motor, a case (housing) 6 holding the motor, a battery to be detachably fixed to the case 6, a shaft pipe (cylindrical member) 3 connected to the case 6, a main operation part 2 that is mounted on the shaft pipe 3 and is furnished with a drive shaft for transmitting the rotation of the motor, a driven shaft that receives a rotation from the drive shaft of the main operation part 2 and rotates and a cutting blade attachment (operation unit) 4 furnished with an operation part (cutting blade 24) driven by the driven shaft and detachably attaches the cutting blade attachment (operation unit) 4 to the opposite motor side end part of the main operation part 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cordless gardening tool with high versatility, in which a work unit is detachably attached to a main operation unit including a motor, a battery, and the like, and the work unit can be replaced according to work contents.

  Conventionally, as an engine mower using an engine as a drive source, a gear box that houses a gear is connected to one end of a shaft pipe, and a cutting tool for cutting grass, branches, or the like is connected to the lower side of the gear box. An engine housing integrated with a fuel tank is connected to the other end, and the rotational output of the engine is transmitted to the blade tool via the drive shaft in the shaft pipe and the gear housed in the gear box to rotate the blade tool. Is common.

  By the way, Patent Document 1 proposes a separation / removal device that can be replaced with a blade other than a cutting blade in order to give the brush cutter versatility.

Further, in Patent Document 2, a working unit in which a cutting tool, a driving shaft, and a pipe are integrated with each other can be exchanged / removed via a connecting unit with respect to an engine operating unit in which an engine, a driving shaft and a pipe are integrated. A brush cutter has been proposed. In this brush cutter, the cutting blade is fixed to the output shaft. However, it is possible to remove the cutting blade and attach the clipper that reciprocates via the shaft coupling to the output shaft.
Utility Model Registration No. 3119138 JP 2007-082498 A

  In the case of the brush cutter described in Patent Document 1, a method of exchanging the submersible pump, the cultivator, etc. in addition to the cutting blade with the shaft pipe (pipe case) including a part of the drive shaft is employed. Due to the use of engines, loud noise is a problem in residential areas. The engine can be adjusted in the range of 0 to 12000 rpm by opening and closing the throttle lever. For example, in the case of a brush cutter, the optimum engine speed with low engine vibration and high cutting ability is around 7000 rpm. It is used by adjusting with the throttle lever so that the rotation speed becomes. On the other hand, when using as a submersible pump or cultivator, the rotating fan and work blade are both mass unbalanced compared to the cutting blade, so the rotation speed is lower than that of the cutting blade. Each is accompanied by the troublesome work of adjusting the optimum rotational speed while checking with a tachometer.

  Even if a reduction gear such as a gear is used for the rotating blade part, the rotational speed changes with the throttle lever, so the rotational speed must be adjusted after all. Also, depending on the work, not only operations on a surface that is always horizontal with respect to the ground, but also work on slopes, etc., it is difficult work because the operator needs to perform operations such as tilting the brush cutter. .

  Furthermore, the handle position and the shoulder band position so that the operator can operate most easily in the initial state with the cutting blade attached, i.e., the cutting blade is almost horizontal to the ground and slightly lifted from the ground when held. However, there is a problem that the center of gravity changes every moment during use. This is because the end of the shaft pipe is equipped with a mixed gasoline container with a capacity of 0.5 liter to 1 liter, so as the mixed gasoline decreases with time, the mass balance changes and the cutting edge becomes heavy, which is unknown. It had to be operated to lift the brush cutter without knowing it, and it was a work that made the arms tired. This applies not only to the cutting blade but also to operations using other cutting tools.

  Similarly, in the case of the brush cutter described in Patent Document 2, noise is a problem because the drive source is an engine, and the rotation speed is difficult to adjust, and the mass balance also changes. A reciprocating clipper cuts with a branch or leaf between the blades, and if the reciprocating number is large, it is difficult for the workpiece to enter between the blades. Therefore, the number of strokes is usually 1600 strokes per minute. In order to achieve the optimum number of strokes even if the gear is decelerated, the engine speed must be adjusted with the throttle lever. Furthermore, since the clipper with a larger mass than the cutting blade is attached to the output shaft, the clipper part becomes heavier, the center of gravity of the brush cutter moves to the clipper part, and the remaining amount of gasoline in the mixed gasoline container increases as described above. In order to decrease, the engine portion becomes lighter, and the operator has to operate to lift the brush cutter further, which makes the arm more tired.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a cordless garden tool with high versatility and low noise that can perform a plurality of types of work by one unit.

In order to achieve the above object, a first aspect of the present invention includes a motor, a housing that houses the motor, a battery that is detachably attached to the housing, a cylindrical member that is connected to the housing, and the cylinder. A main operating portion provided with a drive shaft provided on the member and transmitting the rotation of the motor;
A driven shaft that rotates in response to rotation from the drive shaft of the main operating portion; a working unit that includes a working portion driven by the driven shaft;
The cordless gardening tool is configured by detachably attaching the work unit to the end of the main operation unit on the side opposite to the motor.

  According to a second aspect of the present invention, in the first aspect of the invention, a plurality of types of work units having different work parts can be attached to the main operation part.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the work unit is provided with a speed reduction mechanism.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a balance weight is attached to the cylindrical member of the main operation portion so that the position can be adjusted.

  The invention according to claim 5 is the invention according to claim 4, characterized in that an illumination device is provided on the balance weight.

  According to a sixth aspect of the invention, in the fifth aspect of the invention, the lighting device is attached to the balance weight so as to be tiltable.

  The invention according to claim 7 is characterized in that, in the invention according to any one of claims 1 to 6, a handle is attached to the cylindrical member of the main operation portion so that the position of the handle can be adjusted.

  The invention according to claim 8 is the invention according to claim 1, characterized in that a lithium ion battery is used as the battery.

  According to the first and second aspects of the invention, since a low noise motor is used as a drive source, low noise can be realized. Further, by exchanging the work unit attached to the main operation unit according to the work content, a plurality of kinds of work can be performed with one cordless garden tool, and the versatility of the cordless garden tool is enhanced.

  According to the third aspect of the present invention, since the rotation speed of the motor when there is no load is constant and does not change, the rotation speed of the working unit is optimized by incorporating a reduction mechanism in advance in each work unit according to the load during work Can be set to any value.

  According to the fourth aspect of the present invention, the weight balance of the cordless garden tool can be adjusted without changing the effective length of the cylindrical member by adjusting the mounting position of the balance weight according to the operator, the type of work, the work conditions, and the like. Can be maintained well, and required work can be efficiently performed with good workability.

  According to the fifth aspect of the present invention, the work site can be illuminated by the illumination device provided on the balance weight, and the work can be efficiently performed with good workability.

  According to the invention described in claim 6, it is possible to appropriately illuminate a necessary portion over a wide range by adjusting the mounting angle of the lighting device.

  According to the seventh aspect of the present invention, since the handle is attached to the cylindrical member of the main operation portion so that the position of the handle can be adjusted, the weight balance of the cordless garden tool is improved by adjusting the attachment position of the handle to the cylindrical member together with the balance weight. Can keep on. The adjustment range of the weight balance can be expanded.

  According to the invention described in claim 8, since a lithium ion battery that is lighter and has a higher capacity than a nickel cadmium battery or a nickel metal hydride battery is used as the battery, the motor side is not excessively heavy and the overall weight balance is kept good. It is possible to reduce the fatigue of the operator and to perform the work efficiently with good workability.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

<Embodiment 1>
FIG. 1 is a side view of an attachment-type mower as an embodiment of the cordless garden tool according to the present invention, FIG. 2 is an enlarged side sectional view of a cutting blade attachment of the attachment-type mower, and FIG. 4 is a sectional view (bottom view) in the direction of arrow B in FIG. 3, and FIG. 5 is a sectional view taken along line CC in FIG.

  The attachment type mower 1 shown in FIG. 1 is used with a cutting blade attachment 4 as a work unit detachably attached to a tip of a shaft pipe 3 which is a cylindrical member of a main operation unit 2 by a joint 5. The main operation unit 2 is composed of the shaft pipe 3 and a case 6 fixed to the upper end thereof. Although not shown, the case 6 houses a motor, a battery, and a speed reducer as a drive source. Has been. As shown in FIG. 3, a drive shaft 7 is inserted into the shaft pipe 3, and one end (upper end) of the drive shaft 7 is connected to a motor via a speed reducer (not shown). The rotational force of the motor is transmitted to the drive shaft 7 through the speed reducer. In the present embodiment, a lithium ion battery is used for the battery housed in the case 6.

  As shown in FIG. 1, a main handle 8 is attached to the outer periphery of the intermediate portion in the longitudinal direction of the shaft pipe 3, and a switch 9 for starting / stopping the motor is attached to the main handle 8. ing. Further, an auxiliary handle 10 is fixed to the front of the main handle 8 of the shaft pipe 3 so as to be detachable and adjustable in position, and a shoulder band 11 is attached between the auxiliary handle 10 and the main handle 8.

  On the other hand, the cutting blade attachment 4 shown in FIG. 2 includes a gear box 12, and a shaft pipe 13, which is a cylindrical member, is formed obliquely from above in a cylindrical portion 12 </ b> A formed obliquely and integrally with the gear box 12. Inserted and fixed. That is, a slit 12a that is long in the axial direction is formed at the upper end portion of the cylindrical portion 12A of the gear box 12, and a bolt that is inserted into a pair of flanges 14 that are integrally formed on both sides of the slit 12a of the cylindrical portion 12A. The shaft pipe 13 is fixed to the cylindrical portion 12A by tightening 15, and the shaft pipe 13 is positioned and prevented from rotating by tightening a screw 16 screwed onto the outer periphery of the upper end of the cylindrical portion 12A.

  A driven shaft 17 is inserted into the shaft pipe 13, and a lower end portion of the driven shaft 17 is rotatably supported by a bearing 18, and a lower end portion of the driven shaft 17 protruding obliquely downward from the bearing 18 An input bevel gear 19 is attached.

  A spindle 20 is supported in the gear box 12 vertically and rotatably by a pair of upper and lower bearings 21 and 22, and an output bevel gear 23 meshing with the input bevel gear 19 is connected to the upper end portion of the spindle 20. It is worn. The lower end portion of the spindle 20 protrudes downward from the gear box 12, and a disc-shaped cutting blade 24 is sandwiched between the receiving seat 25 and the nut guard 26 at the protruding portion, and is attached to the lower end screw portion of the spindle 20. The cutting blade 24 is attached to the lower end of the spindle 20 by tightening the screwed nut 27.

  Next, the structure of the joint 5 will be described with reference to FIGS.

  The joint 5 includes a cylindrical cylindrical portion 5A, and two flange-shaped plates 28 are integrally formed at a lower portion of the cylindrical portion 5A with a predetermined interval. And as shown in FIG.3 and FIG.4, the slit-shaped groove 5a is formed over the predetermined length from the edge part in two places between the said plates 28 of 5 A of cylindrical parts. In addition, circular holes 28a are respectively provided at two positions in the longitudinal direction of the two plates 28, and butterfly bolts 29 are inserted into these circular holes 28a. The nut 30 is screwed.

  Thus, while the lower end portion of the shaft pipe 3 of the main operation portion 2 is inserted into the cylindrical portion 5A of the joint 5, the upper end portion of the shaft pipe 13 of the cutting blade attachment 4 is inserted, FIG. As shown, a screw hole 3a is formed in the shaft pipe 3 on the main operating portion 2 side, and circular locking holes 13a are equiangular at eight positions on the entire circumference of the shaft pipe 13 on the cutting blade attachment 4 side. It is formed at a pitch (45 ° pitch). Here, as described above, the drive shaft 7 is passed through the shaft pipe 3 on the main operating portion 2 side, and the driven shaft 17 is passed through the shaft pipe 13 on the cutting blade attachment 4 side. The lower end portion of the drive side shaft 7 and the upper end portion of the driven shaft 17 are rotatably supported by bearings 31 and 32, respectively. An adapter 33 having a hexagonal hole 33a (see FIG. 5) is formed at the lower end of the drive shaft 7 protruding downward from the bearing 31. Further, a hexagonal columnar fitting portion 17a that fits into the hexagonal hole 33a of the adapter 33 is integrally formed at the front end protruding upward.

  Also, as shown in FIG. 3, a circular locking hole 5b is formed at a location matching the locking hole 13a formed in the shaft pipe 13 of the cylindrical portion 5A of the joint 5. A positioning pin 34 is slidably inserted into the stop hole 5b. Here, the positioning pin 34 is movably held by a holder 35 fixed to the outer periphery of the cylindrical portion 5A of the joint 5, and an operation knob 36 is attached to the outer end thereof. The positioning pin 34 is constantly urged radially inward (downward in FIG. 3) by a spring 37 that is compressed in the holder 35.

  Thus, the cutting blade attachment 4 is attached to the main operation unit 2 by the joint 5, but the joint 5 is always fixed to the main operation unit 2 side. That is, the cylindrical portion 5A of the joint 5 is fitted into the outer periphery of the shaft pipe 3 on the main operation portion 2 side, and the screw 16 inserted through the cylindrical portion 5A is inserted into one of the locking holes 13a of the shaft pipe 13 to join the joint. The joint 5 is fixed to the lower end portion of the shaft pipe 3 of the main operation portion 2 by positioning and locking the 5 and tightening the butterfly bolt 29 inserted into the circular hole 28 a formed in the plate 28.

  By attaching the cutting blade attachment 4 to the joint 5 fixed to the main operating portion 2 as described above, the cutting blade attachment 4 can be easily attached to the main operating portion 2. That is, the wing bolt 29 inserted into the circular hole 28a of the plate 28 of the joint 5 is loosened, the operation knob 36 is pinched and the positioning pin 34 is pulled radially outward against the urging force of the spring 37, and its tip is The shaft pipe 13 of the cutting blade attachment 4 is inserted into the lower half of the cylindrical portion 5A of the joint 5 from below while being retracted from the inner peripheral surface of the cylindrical portion 5A of the joint 5, and is formed in the shaft pipe 13. One of the locking holes 13a is aligned with the locking hole 5b formed in the tubular portion 5A of the joint 5. In this state, when the force pulling the operation knob 36 is released, the positioning pin 34 moves inward in the radial direction by the biasing force of the spring 37, so that one of the locking holes 13a of the shaft pipe 13 as shown in FIG. Therefore, the cutting blade attachment 4 is positioned and prevented from rotating and the joint 5 is prevented from coming off. Further, as described above, when the shaft pipe 13 of the cutting blade attachment 4 is inserted into the lower half of the cylindrical portion 5A of the joint 5 from below, the fitting portion 17a formed at the upper end of the driven shaft 17 becomes the main operation portion 2. The driven shaft 17 is connected to the drive shaft 7 via the adapter 33 so that the rotation of the drive shaft can be transmitted to the driven shaft 17 in order to fit into the hexagonal hole 33a of the adapter 33 attached to the drive shaft 7 on the side. Become.

  When the butterfly bolt 29 is finally tightened, the shaft pipe 13 is fixed to the joint 5, so that the cutting blade attachment 4 is attached to the main operation portion 2 by the joint 5.

  Next, the operation of the attachment type mower 1 having the cutting blade attachment 4 attached to the main operation unit 2 as described above will be described.

  At the time of mowing work, the operator hangs the shoulder band 11 on the shoulder to support the attachment-type mower 1 and adjusts and fixes the auxiliary handle 10 to the position where it can be most easily operated. In this state, when the switch 9 provided on the main handle 8 is turned on, the motor is powered from the battery built in the case 6 to start the motor, and its rotation is decelerated by the speed reducer and transmitted to the drive shaft 7. The rotation of the drive shaft 7 is transmitted to the driven shaft 17 of the cutting blade attachment 4 via the adapter 33, and the driven shaft 17 is driven to rotate at a predetermined rotational speed. The rotation of the driven shaft 17 is changed in direction by the input bevel gear 19 and the output bevel gear 23 and transmitted to the spindle 20, and the spindle 20 and the cutting blade 24 attached thereto are rotationally driven at a predetermined speed. Then, when the operator holds the main handle 8 and the auxiliary handle 10 and swings the distal end portion of the attachment type mower 1, the required mowing operation can be performed by the rotating cutting blade 24. In the present embodiment, the input bevel gear 19 and the output bevel gear 23 constitute a speed reduction mechanism, and the rotational speed of the cutting blade 24 when no mowing operation is not performed is set to around 7000 rpm.

  By the way, the cordless gardening tool according to the present invention can be used by changing the working unit mounted on the main operation unit 2 in addition to the attachment type mower 1 shown in FIG. . For example, the cordless gardening tool is used as a planting clipper or a gardening clipper by attaching the planting clipper attachment 4 ′ shown in FIGS. 6 and 7 and the gardening clipper attachment 4 ″ shown in FIGS. 8 and 9 to the main operation unit 2. be able to.

<Embodiment 2>
Here, the configuration of the planting hair clipper attachment 4 ′ will be described with reference to FIGS.

  6 is a side cross-sectional view of the main part of the plant clipper attachment, and FIG. 7 is a cross-sectional view taken along the line DD of FIG. 6. In FIG. 6, the same elements as those shown in FIG. In the following, a repetitive description thereof will be omitted.

  A large-diameter output bevel gear 23 is attached to the spindle 20 of the plant attachment 4 ′ shown in FIG. 6, and this output bevel gear 23 meshes with a small-diameter input bevel gear 19 attached to the lower end of the driven shaft 17. ing. The input bevel gear 19 and the output bevel gear 23 constitute a speed reduction mechanism.

  Also, disc-shaped eccentric cams 38 and 39 are fixed to the upper and lower sides of the spindle 20 in a state where they are shifted from each other by 180 °. These eccentric cams 38 and 39 are connected to the upper blade 40 which is vertically stacked. The lower blade 41 is fitted in long holes 40a and 41a formed in the respective base end portions. The gear box 12 and the shaft pipe 13 of the plant clipper attachment 4 'are set shorter than those of the cutting blade attachment 4, thereby reducing the weight of the plant clipper attachment 4.

  Thus, when the cordless garden tool according to the present invention is used as a planting hair clipper, the cutting blade attachment 4 attached to the main operation unit 2 is removed as shown in FIG. Attach attachment 4 '. That is, the wing bolt 29 of the joint 5 shown in FIGS. 3 to 5 is turned and loosened to release the fixing of the cutting blade attachment 4 to the joint 5 of the shaft pipe 13 and the operation knob 36 of the positioning pin 34 is removed. Then, the positioning pin 34 is pulled radially outward against the urging force of the spring 37, and the positioning pin 34 is pulled out from the locking hole 13 a of the shaft pipe 13. Then, the shaft pipe 13 can be pulled out from the joint 5, and the cutting blade attachment 4 can be easily detached from the main operation unit 2.

  When the cutting blade attachment 4 is detached from the main operation unit 2 as described above, the planting clipper attachment 4 ′ can be mounted on the main operation unit 2 in the same manner as the cutting blade attachment 4 is mounted.

  That is, in a state where the operation knob 36 is picked and the positioning pin 34 is moved radially outward against the urging force of the spring 37, and the tip thereof is retracted from the inner peripheral surface of the cylindrical portion 5A of the joint 5, The shaft pipe 13 of the plant clipper attachment 4 ′ is inserted into the lower half of the cylindrical portion 5 A of the joint 5 from below, and one of the locking holes 13 a formed in the shaft pipe 13 is inserted into the cylindrical portion 5 A of the joint 5. Align with the formed locking hole 5b. In this state, when the force pulling the operation knob 36 is released, the positioning pin 34 moves inward in the radial direction by the biasing force of the spring 37, so that one of the locking holes 13a of the shaft pipe 13 as shown in FIG. Therefore, the planting clipper attachment 4 ′ is positioned and prevented from rotating, and from the joint 5. Then, as described above, when the shaft pipe 13 of the planting clipper attachment 4 ′ is inserted into the lower half of the cylindrical portion 5 </ b> A of the joint 5 from below, the fitting portion 17 a formed at the upper end of the driven shaft 17 is the main operation portion. The driven shaft 17 is connected to the drive shaft 7 via the adapter 33 so that the driven shaft 17 is engaged with the hexagonal hole 33 a of the adapter 33 attached to the drive shaft 7 on the second side, and the rotation of the drive shaft 7 is transmitted to the driven shaft 17. It becomes possible.

  When the butterfly bolt 29 is finally tightened, the shaft pipe 13 is fixed to the joint 5, so that the planting clipper attachment 4 ′ is attached to the main operation unit 2 by the joint 5.

  Next, the operation of the plant clipper formed by mounting the plant clipper attachment 4 ′ on the main operation unit 2 as described above will be described.

  When pruning a plant, the operator hangs the shoulder band 11 on the shoulder to support the plant clipper, and when the switch 9 provided on the main handle 8 is turned on, the motor built in the case 6 is activated. The rotation is decelerated by the speed reducer and transmitted to the drive shaft 7. The rotation of the drive shaft 7 is transmitted to the driven shaft 17 of the plant clipper attachment 4 ′ via the adapter 33, and the driven shaft 17 is rotated at a predetermined rotational speed. Driven by rotation. The rotation of the driven shaft 17 is decelerated by the input bevel gear 19 and the output bevel gear 23 and the direction thereof is changed and transmitted to the spindle 20, and the eccentric cams 38 and 39 connected to the spindle 20 are connected to the spindle 20. The upper blade 40 and the lower blade 41, which are rotationally driven at a predetermined speed and are fitted to the eccentric cams 38 and 39, reciprocate in a straight line alternately in opposite directions, and the upper blade 40 and the lower blade 41 prun the plant. Is made. In this embodiment, the rotation speed of the spindle 20 is set to about 1600 rpm, and the stroke numbers of the upper blade 40 and the lower blade 41 are set to about 1600 per minute.

  By the way, when cutting the side of the hedge, for example, the planting clipper attachment 4 ′ is rotated by 90 ° with respect to the main operation unit 2 so that the upper blade 40 and the lower blade 41 are in a vertical state with respect to the ground when held. You can install it.

<Embodiment 3>
Next, the configuration of the gardening hair clipper attachment 4 ″ will be described with reference to FIGS.

  8 is a side cross-sectional view of the gardening clipper attachment, FIG. 9 is a cross-sectional view taken along the line EE of FIG. 8, and in FIG. 8, the same elements as those shown in FIG. The re-explanation about them is omitted.

  In the horticultural hair clipper attachment 4 ″ shown in FIG. 8, the upper blade 43 swings right and left about the screw pin 44 with respect to the lower blade 42 fixed to the bottom surface of the gear box 12, and the lawn and the like are cut off. An eccentric cam 45 is attached to the lower end of the spindle 20 in the gear box 12, and the eccentric cam 45 is formed in the front-rear direction formed in the base end portion of the upper blade 43 (left and right in FIG. 8 or FIG. 9). (Long direction) is fitted in the long hole 43a.

  Thus, the cordless garden tool can be used as a garden hair clipper by attaching the garden attachment 4 ″ to the main attachment portion 2 of the cordless garden tool according to the present invention in the same manner as the plant clippers attachment 4 ′. .

  That is, when the operator turns on the switch 9 provided on the main handle 8 during work, the motor built in the case 6 is started, and the rotation is decelerated by the speed reducer and transmitted to the drive shaft 7. 7 is transmitted to the driven shaft 17 of the gardening hair clipper attachment 4 ″ via the adapter 33, and the driven shaft 17 is driven to rotate at a predetermined rotational speed. The input bevel gear 19 and the output bevel gear 23 are decelerated and the direction is changed and transmitted to the spindle 20, and the spindle 20 and the eccentric cam 45 coupled thereto are rotationally driven at a predetermined speed. The upper blade 43 in which the long hole 43a is fitted to the cam 45 swings left and right around the screw pin 44, and the upper blade 43 and the lower blade Grass and the like are mown by 2. In this embodiment, the oscillating number of the upper blade 43 is set to about per minute 1300 times.

<Embodiment 4>
Next, another embodiment of the cutting blade attachment will be described with reference to FIG.

  FIG. 10 is a side sectional view of the main part of the cutting blade attachment according to the fourth embodiment. In the illustrated cutting blade attachment 4, the gear box 12 ′ is divided into an L-shaped box 12A ′ and an output box 12B ′. Yes.

  The L-shaped box 12A 'has a shape bent in an L shape, and an input bevel gear 19 is attached to the end of the driven shaft 17 inserted and fixed therein. And the collar part 12a 'is integrally formed in the outer periphery of the edge part of L-shaped box 12A' over the perimeter.

  On the other hand, the output box 12B 'also has a shape bent in an L-shape, in which the spindle 20 is arranged in parallel with the driven shaft 17, and an output bevel gear 23 is attached to the end thereof. Yes. A groove 12b 'is formed in the inner periphery of the end of the horizontally bent portion of the output box 12B', and the flange 12a 'of the L-shaped box 12A' is fitted into the groove 12b '. The L-shaped box 12A ′ and the output box 12B ′ are connected so as to be relatively rotatable. Here, a slit-shaped slit 12c ′ is formed at one end of the horizontal portion of the output box 12B ′, and the slit 12c ′ is sandwiched between the slit 12c ′ on the outer periphery of the horizontal portion of the output box 12B ′. A pair of blocks 46 (only one is shown in FIG. 10) are formed on both sides (perpendicular to the plane of FIG. 10). A butterfly bolt 47 is inserted into the block 46, and a nut (not shown) is screwed to the end of the butterfly bolt 47.

  Thus, if the L-shaped box 12A ′ and the output box 12B ′ are released by loosening the butterfly bolt 47, the output box 12B ′ is held in the L-shaped box while keeping the spindle 20 parallel to the driven shaft 17. It can be rotated 360 ° with respect to the L-shaped box 12A ′ around the flange 12a ′ of 12A ′.

  A horizontal connecting shaft 48 is rotatably supported in the gear box 12 ′ by two bearings 48. A bevel gear 50 that meshes with the input bevel gear 19 is connected to one end of the connecting shaft 48 in the axial direction. A bevel gear 51 that meshes with the output bevel gear 23 is attached to the other axial end of the connecting shaft 48.

  In the cutting blade attachment 4, the rotation transmitted from the motor (not shown) to the driven shaft 17 is transmitted to the spindle 20 through the bevel gears 19, 50, the connecting shaft 48 and the bevel gears 51, 23. A cutting blade (not shown) bound thereto is rotationally driven at a predetermined speed.

  Such a configuration of the cutting blade attachment 4 can also be adopted for the planting clipper attachment 4 ′ shown in FIGS. 6 and 7 and the gardening clipper attachment 4 ″ shown in FIGS. 8 and 9.

<Embodiment 5>
Next, a fifth embodiment of the present invention will be described with reference to FIGS.

  FIG. 11 is a side view of an attachment-type mower according to Embodiment 5 of the present invention, and FIG. 12 is a cross-sectional view taken along line FF in FIG.

  The attachment-type mower 1 shown in FIG. 11 is configured by detachably attaching a cutting blade attachment 4 to a tip of a shaft pipe 3 of a main operation unit 2 by a joint 5. Although it is the same as what was shown, the balance weight 52 made from copper is attached between the main handle 8 and the case 6 of the shaft pipe 3 so that position adjustment is possible.

  As shown in FIG. 12, the balance weight 52 is configured such that each end of a wide upper clamp 53 and a narrow lower clamp 54 arranged at the center in the width direction of the upper clamp 53 are rotatably connected by pins 55. Arc-shaped recesses 53a and 54a along the outer periphery of the shaft pipe 3 are respectively formed at the other ends of the upper clamp 53 and the lower clamp 54, and the shaft pipe 3 is sandwiched between the recesses 53a and 54a. Has been.

  Further, a bolt 56 is inserted in the longitudinal center portion of the upper clamp 53 and the lower clamp 54, and the balance weight 52 is attached to the shaft pipe 3 by tightening a wing nut 57 that is screwed into an end portion of the bolt 56. It is done. Then, the balance weight 52 is released by loosening the wing nut 57, the balance weight 52 is moved along the shaft pipe 3, and then the wing nut 57 is tightened again to fix the balance weight 52 to the shaft pipe 3. By doing so, the position of the balance weight 52 can be arbitrarily adjusted.

  Thus, when mowing using the attachment-type mower 1 according to the present embodiment, the operator hangs the shoulder band 11 on the shoulder, holds the main handle 8 and the auxiliary handle 10, and the overall weight balance is lost. If the wing nut 57 is loosened with a finger, the balance weight 52 is moved along the shaft pipe 3 in the direction in which the weight balance is improved, and the position thereof is adjusted. To fix the balance weight 52 at that position.

  After the weight balance of the attachment-type mower 1 is adjusted well as described above, when the switch 9 provided on the main handle 8 is turned on, the motor is supplied with power from the battery built in the case 6. The rotation is decelerated by the speed reducer and transmitted to the drive shaft. The rotation of the drive shaft is transmitted to the driven shaft of the cutting blade attachment 4, and the driven shaft is rotationally driven at a predetermined rotational speed. . Then, the rotation of the driven shaft is changed in direction by a bevel gear built in the gear box 12 and transmitted to the spindle, and the spindle and the cutting blade 5 attached thereto are rotationally driven at a predetermined speed. Grass and branches are cut by the rotating cutting blade 5.

  Thus, in the present embodiment, the attachment position of the balance weight 52 can be adjusted in accordance with the physique of the worker, the type of cutting tool, the working conditions, etc., so that the weight balance of the attachment type mower 1 is good. The required mowing work can be performed with good workability.

  Note that the attachment position of the balance weight 52 is not limited to the present embodiment, and is arbitrary as long as attachment is possible. For example, as shown in FIG. 13, a configuration in which a clamp bar 58 is attached to the case 6 and a balance weight 52 is attached to the clamp bar 58 may be employed.

  In the present embodiment, since the auxiliary handle 10 is attached to the shaft pipe 3 of the main operation unit 2 so that the position of the auxiliary handle 10 can be adjusted, the attachment type is adjusted by adjusting the attachment position of the auxiliary handle 10 to the shaft pipe 3 together with the balance weight 52. The weight balance of the mower 1 can be kept good. The adjustment range of the weight balance can be expanded.

  Furthermore, as shown in FIGS. 14 and 15, an illumination device 59 can be provided on the balance weight 52.

  14 is a cross-sectional view of the balance weight provided with the illumination device, FIG. 15 is a cross-sectional view taken along the line GG of FIG. 14, and the balance weight 52 includes the wide upper clamp 53 and the width direction of the upper clamp 53. One end of a narrow clamp 54 arranged at the center is rotatably connected by a pin 55, and the other end of the upper clamp 53 and the lower clamp 54 is a circle along the outer periphery of the shaft pipe 3. Arc-shaped recesses 53a and 54a are formed, and the shaft pipe 3 is sandwiched between the recesses 53a and 54a. Further, a bolt 56 is inserted in the longitudinal center portion of the upper clamp 53 and the lower clamp 54, and the balance weight 52 is attached to the shaft pipe 3 by tightening a wing nut 57 that is screwed into an end portion of the bolt 56. It is done. Then, the balance weight 52 is released by loosening the wing nut 57, the balance weight 52 is moved along the shaft pipe 3, and then the wing nut 57 is tightened again to fix the balance weight 52 to the shaft pipe 3. By doing so, the position of the balance weight 52 can be arbitrarily adjusted.

  Thus, as shown in FIG. 14, a round shaft 54A is integrally projected on the lower clamp 54, and a ball 54B is integrally formed at the end of the round shaft 54A. An illuminating device 59 composed of a wide upper cover 61 and a narrow lower cover 62 whose ends are coupled to each other by connecting pins 60 is attached to the ball 54B so as to be tiltable about the ball 54B. On the opposite side of the connecting pin 60 of the upper cover 61 of the lighting device 59, there is provided a light storage portion 63 for storing a light and a light battery (not shown). A switch 64 for turning off / off and a light lens 65 are provided. The upper cover 61 and the lower cover 62 are respectively formed with hemispherical concave portions 61a and 62a along the outer peripheral surface of the ball 54B and tapered surfaces 61b and 62b that allow the illumination device 59 to tilt around the ball 54B. Yes.

  As shown in FIG. 15, a bolt 66 is inserted through the upper cover 61 and the lower cover 62 of the lighting device 59, and a wing nut 67 is screwed into the end of the bolt 66. Therefore, if the wing nut 67 is loosened, the illuminating device 59 can be tilted about the ball 54B to adjust the mounting angle of the illuminating position 59. After the adjustment, the illuminating device 59 is fixed by tightening the wing nut 67. be able to.

  When the lighting device 59 is provided on the balance weight 52 in this way, the lighting device 59 can irradiate the work site with light so that mowing work can be performed with good workability, and the angle of the lighting device 59 is adjusted. Appropriate locations can be illuminated over a wide area.

  As described above, according to the cordless garden tool according to the present invention, since a low noise motor is used as a drive source, low noise can be realized. Further, the work unit attached to the main operation unit 2 according to the work content is the cutting blade attachment 4 according to the first embodiment, the planting clipper attachment 4 'according to the second embodiment, or the gardening clipper attachment according to the third embodiment. By exchanging with 4 ″ or the like, a plurality of types of work can be performed with one cordless garden tool, and the versatility of the cordless garden tool is enhanced.

  Furthermore, in the cordless gardening tool according to the present invention, since the rotation speed of the motor at no load is constant and does not change, the rotation speed of the working unit is obtained by incorporating a speed reduction mechanism in advance in each work unit according to the load during work. Can be set to an optimal value.

  Further, in this embodiment, since a lithium ion battery that is lighter and has a higher capacity than a nickel cadmium battery or a nickel metal hydride battery is used as the battery, the motor 3 side is not excessively heavy, and the overall weight balance can be kept good. In addition, the fatigue of the operator can be reduced and the work can be performed efficiently with good workability.

  In addition, although the above demonstrated the form which uses a cordless garden tool as an attachment-type mower, a garden clipper, and a gardening clipper by exchanging a work unit, as a kind of work unit, a blade such as a chain saw, a tilling tool, Other arbitrary things, such as a blower, are mentioned.

It is a side view of the attachment type mower according to Embodiment 1 of the present invention. It is an expanded sectional side view of the cutting blade attachment of the attachment type mower which concerns on Embodiment 1 of this invention. It is the A section expanded sectional view of FIG. It is a figure (bottom view) of the arrow B direction of FIG. It is CC sectional view taken on the line of FIG. It is a sectional side view of the plant clipper attachment principal part which concerns on Embodiment 2 of this invention. It is the DD sectional view taken on the line of FIG. It is a sectional side view of the gardening clipper attachment which concerns on Embodiment 3 of this invention. It is the EE sectional view taken on the line of FIG. It is a sectional side view of the cutting blade attachment principal part which concerns on Embodiment 4 of this invention. It is a side view of the attachment-type mower based on Embodiment 5 of this invention. It is the FF sectional view taken on the line of FIG. It is a fragmentary top view which shows the example of attachment of a balance weight. It is sectional drawing of the balance weight with which the illuminating device was attached. It is the GG sectional view taken on the line of FIG.

Explanation of symbols

1 Attachment-type mower (cordless gardening tool)
2 Main operation part 3 Shaft pipe (cylindrical member)
3a Screw hole of shaft pipe 4 Cutting blade attachment (work unit)
4 'Garden hair clipper attachment (work unit)
4 "Horticultural hair clipper attachment (work unit)
DESCRIPTION OF SYMBOLS 5 Joint 5A Joint cylindrical part 5a Cylindrical groove 5b Cylindrical locking hole 6 Case 7 Drive shaft 8 Main handle 9 Switch 10 Auxiliary handle 11 Shoulder band 12, 12 'Gear box 12A Gear box cylinder 12A 'Gear box L-shaped box 12B' Gear box output box 12a Cylindrical slit 12a 'L-shaped flange 12b' Output box groove 12c 'Output box slot 13 Shaft pipe (cylindrical) Element)
13a Shaft pipe locking hole 14 Flange 15 Bolt 16 Screw 17 Drive shaft 17a Drive shaft fitting portion 18 Bearing 19 Input bevel gear 20 Spindle 21, 22 Bearing 23 Output bevel gear 24 Cutting blade 25 Seat 26 Nut guard 27 Nut 28 Plate 28a Plate hole 29 Butterfly bolt 30 Nut 31, 32 Bearing 33 Adapter 33a Adapter hexagon hole 34 Positioning pin 35 Holder 36 Operation knob 37 Spring 38, 39 Eccentric cam 40 Upper blade 40a Upper blade long hole 41 Lower blade 41a Lower Blade long hole 42 Lower blade 43 Upper blade 43a Upper blade long hole 44 Screw pin 45 Eccentric cam 46 Block 47 Wing bolt 48 Connection shaft 49 Bearing 50, 51 Bevel gear 52 Balance wheel 53 Upper clamp 53a Upper clamp recess 54 Lower clamp 54A Lower clamp round shaft 54B Lower clamp ball 54a Lower clamp recess 55 Pin 56 Bolt 57 Wing nut 58 Clamping bar 59 Lighting device 60 Connecting pin 61 Upper cover 61a Upper Cover hemispherical recess 61b Tapered surface of upper cover 62 Lower cover 62a Hemispherical recess of lower cover 62b Tapered surface of lower cover 63 Light storage portion 64 Switch 65 Light lens 66 Bolt 67 Wing nut

Claims (8)

A motor, a housing that houses the motor, a battery that is detachably attached to the housing, a cylindrical member that is connected to the housing, and a drive shaft that is provided on the cylindrical member and transmits the rotation of the motor A main operation unit with
A driven shaft that rotates in response to rotation from the drive shaft of the main operating portion; a working unit that includes a working portion driven by the driven shaft;
A cordless gardening tool, wherein the work unit is detachably attached to an end of the main operation portion on the side opposite to the motor.   The cordless garden tool according to claim 1, wherein a plurality of types of work units having different work parts can be attached to the main operation part.   The cordless gardening tool according to claim 1, wherein a speed reduction mechanism is provided in the work unit.   The cordless gardening tool according to any one of claims 1 to 3, wherein a balance weight is attached to the cylindrical member of the main operation unit so that the position of the balance weight can be adjusted.   The cordless garden tool according to claim 4, wherein a lighting device is provided on the balance weight.   6. The cordless garden tool according to claim 5, wherein the lighting device is attached to the balance weight so as to be tiltable.   The cordless gardening tool according to any one of claims 1 to 6, wherein a handle is attached to the cylindrical member of the main operation unit so that the position of the handle can be adjusted.   The cordless garden tool according to claim 1, wherein a lithium ion battery is used as the battery.

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