JPH052620U - Electric brush cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electric brush cutter that can be reduced in size, weight and cost. [Structure] In an electric brush cutter configured to rotate a brush cutter by a motor mounted on a tip of an operating rod, the brush cutter is directly fixed to an output shaft of the motor, and the operating rod is attached to the motor. It is fixed directly to the case via the fixture. Further, the attachment is formed integrally with the motor case or operating rod. Furthermore, a guard formed so as to surround a part of the brush cutter is formed integrally with the case or operating rod of the motor.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a portable electric brush cutter driven by a motor, Especially for electric brush cutters that have been improved to be compact and lightweight and to reduce manufacturing costs. To do.

[0002]

[Prior art]

  In the field of conventional agriculture and forestry or livestock, paddy field weeds, orchards, forests, etc. Powered brush cutters are used to mow undergrowth or pasture. Electric mowers, which are relatively easy to handle and operate, are widely used.

[0003]   FIG. 6 is a longitudinal sectional view of an essential part showing an example of a conventional electric brush cutter. In FIG. Reference numeral 1 denotes a motor, which is kept in a housing 2 formed in a hollow cylinder with the axis line vertical. To have. For example, if the housing 2 is formed in two with a split surface in the axial direction, preferable. A pinion 3 is fixed to the lower end of the output shaft 4 of the motor 1. 5 is It is an output shaft and is rotatably installed at the bottom of the housing 2. And the rotation of the motor 1 can be transmitted via the gear 6 and the gear 6. 7 is a cutter, For example, it is formed into a disk shape from tool steel, and a plurality of cutting blades 8 are provided on the outer peripheral edge, It is detachably fixed to the lower end of the shaft 5. Reference numeral 9 denotes an operating rod, which is on the side surface of the housing 2. It is fitted to a mounting portion 10 provided on the section and is fixed via a mounting screw 11. 12 is grip The battery pack housing 13 is provided at the rear end of the operating rod 9.

[0004]   With the above structure, the grip portion 12 and the intermediate portion of the operating rod 9 are supported to support the motor. When 1 is driven, the cutter 7 rotates, so the operating rod 9 is swung to move the cutter 7 You can mow grass, undergrowth or pasture by moving it in the horizontal plane. Of.

[0005]

[Problems to be solved by the device]   In the electric brush cutter having the above conventional configuration, the rotation speed of the output shaft 4 of the motor 1 is Since 12,000 rpm is used, through pinion 3 and gear 6 It is necessary to reduce the speed to 1/2 to 1/3 before use. However, as mentioned above, Pinio When using the speed reducing means by the gear 3 and the gear 6, noise is generated and There is a problem that power transmission efficiency is reduced. In addition, the number of components increases Therefore, there is a problem that the manufacturing cost rises. Further, the motor 1 and the deceleration means ( Since the housing 2 for accommodating the pinion 3 and the gear 6) is required, There is also a problem that the overall shape and size and weight become large.

[0006]   On the other hand, the composition ratio of young workers has declined in the fields of agriculture and forestry and livestock in recent years. However, the degree of dependence on girls and elderly workers is increasing, and electric brush cutters are being used. Also in the field of, the demand for smaller size, lighter weight and lower cost is becoming more and more severe. There is.

[0007]   The present invention solves the above-mentioned problems existing in the prior art, reduces the size and weight, and reduces the cost. It is an object of the present invention to provide an electric brush cutter that can be used in various ways.

[0008]

[Means for Solving the Problems]

  In order to achieve the above object, in the present invention, a model installed at the tip of the operating rod is used. In an electric brush cutter configured to rotate the brush cutter by a motor, Attach the brush cutter directly to the motor output shaft and attach the operating rod to the motor case. It is characterized in that it is directly fixed through a fixture. That is, the motor output The rotation speed of the force axis is sharply focused on the fact that it is inversely proportional to the amount of magnetic flux acting on the armature. As a result of careful consideration, without significantly increasing the shape and size of the conventional motor, 7, Try to obtain a motor of about 000 rotations and increase the torque accordingly. Then, this motor was incorporated as a drive source.

[0009]   In the present invention, the attachment is formed integrally with the case or operating rod of the motor 1. be able to. In addition, a guard formed so as to surround a part of the brush cutter is used as a motor. It can be formed integrally with the case or the operating rod.

[0010]

[Action]

  With the above structure, the housing and the speed reducer can be omitted, so Can achieve significant size reduction and weight reduction in comparison with The operability can be significantly improved.

[0011]

【Example】

  FIG. 1 is a side view of an essential part showing a first embodiment of the present invention, in which the same parts are the same as those in FIG. It is indicated by one reference numeral. In Fig. 1, the motor 1 rotates at 6,000 to 7,000 revolutions per minute. I try to select the one with a low rotation speed. And the case that constitutes the motor 1 An attachment 1b is integrally provided near the upper end of the sleeve 1a. This attachment 1b is shown in FIG. It is formed in a hollow shape similar to the mounting portion 10 in the above, and after the operation rod 9 is directly fitted, It is fixed via the attached screw 11. In addition, the attachment mode of the attachment 1b and the operating rod 9 The same bond may be used. Next, the cutter 7 is directly fixed to the output shaft 4 of the motor 1.

[0012]   With the above structure, the grip portion 12 and the intermediate portion of the operating rod 9 are supported to support the motor. If 1 is driven, the cutter 7 can be directly rotated by the output shaft 4, You can mow work. In this case, the weight of the tip of the operating rod 9 is the weight of the motor 1 Since only the cutter and the cutter 7, the housing 2 and The weight of the speed reducer including the pinion 3 and the gear 6 is reduced, and the size is significantly reduced. It is recognized that the reduction in weight and the reduction in weight have been achieved.

[0013]   2 is a side view of a main part of a second embodiment of the present invention, in which the same parts are the same as those in FIG. It is indicated by one reference numeral. In FIG. 2, reference numeral 14 is a fixture, which is the case 1a of the motor 1. A part formed in a semi-cylindrical shape so as to embrace and the part of the operating rod 9 are integrally formed. It Reference numeral 15 is a fastening band, which is used to connect the fixture 14 and the motor 1 to, for example, bolts and nuts. Stick through 16. With this configuration, the weight and weight are the same as in the first embodiment. It is possible to reduce the number, and it is possible to reduce the size and weight.

[0014]   FIG. 3 is a side view of an essential part showing a third embodiment of the present invention, in which the same parts are the same as those in FIG. It is indicated by one reference numeral. In FIG. 3, 17 is a guard, which is an operating rod of the brush cutter 7. It is formed so as to surround a part on the 9 side, and a bolt (not shown) is attached to the case 1a of the motor 1. ) Or the like. With such a structure, It is possible to guarantee the safety of the feet of the worker who works. The first embodiment shown in FIG. Naturally, the same effects as those in (4) are provided.

[0015]   FIG. 4 is a side view of an essential part showing a fourth embodiment of the present invention. And the same reference numerals as in FIG. In FIG. 4, the guard 17 is integrated with the fixture 14. Has been formed. Therefore, in the second embodiment shown in FIG. 2 and the third embodiment shown in FIG. The effect of the thing can be used together.

[0016]   FIG. 5: is a principal part side view which shows the modification of a brush cutter. That is, it is formed into a cylindrical shape A rope 19 is fixedly formed on the outside of the boss 18. To form like this For example, even if pebbles and other solid matter are mixed in the grassland to be cleared, , Or even near obstacles such as fences, to carry out mowing work smoothly and safely. You can

[0017]   The fixture 14 and the guard 17 in the above-described embodiment are made of resin material, for example. It is preferable to use injection molding means. Although the description is omitted in the embodiment, , Switches such as ON / OFF of the motor 1 and output control are provided in the grip portion 12. The operability can be improved by concentrating in the vicinity of. Motor 1, switch, Wiring for connecting the batteries should be provided so as to penetrate through the hollow operation rod 9. Is natural.

[0018]

[Effect of device]

  Since the present invention has the configuration and operation as described above, it has the following effects. You can (1) Since the operating rod is directly fixed to the motor case, Since parts such as a housing are unnecessary and the assembly process is reduced, downsizing is possible. Also, the weight can be reduced, and the manufacturing cost can be reduced. (2) Since the brush cutter is directly attached to the output shaft of the motor, the gear reduction mechanism Is unnecessary, noise is not generated, power transmission efficiency is improved, and manufacturing cost is low. It can be reduced. (3) The operability is greatly improved by achieving the reduction in size and weight.

[Brief description of drawings]

FIG. 1 is a side view of essential parts showing a first embodiment of the present invention.

FIG. 2 is a side view of essential parts showing a second embodiment of the present invention.

FIG. 3 is a side view of essential parts showing a third embodiment of the present invention.

FIG. 4 is a side view of essential parts showing a fourth embodiment of the present invention.

FIG. 5 is a side view of an essential part showing a modified example of the brush cutter.

FIG. 6 is a longitudinal sectional view of an essential part showing an example of a conventional electric brush cutter.

[Explanation of symbols]

1 motor 1a case 1b, 14 attachment 7 cutter 9 control rod 17 Guard

Claims (3)

[Scope of utility model registration request] 1. An electric type brush cutter configured to rotate a brush cutter by a motor mounted on a tip of the handle rod, wherein the brush cutter is directly fixed to an output shaft of the motor, and the handle rod is attached. An electric brush cutter, which is directly fixed to a motor case via a fixture. 2. The electric brush cutter according to claim 1, wherein the attachment is formed integrally with the case of the motor or the operating rod. 3. The electric brush cutter according to claim 1, wherein a guard formed so as to surround a part of the brush cutter is formed integrally with a case of the motor or an operating rod.