JP2006055101A - Electric tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric tiller having good operation efficiency by solving problems in which a traction property and a tilling property are lowered and operation efficiency is lowered. <P>SOLUTION: A tilling part 20 is constituted of a drum-shaped rotor (supporting part) 14 and a tilling claw 15 protrusively installed through a mounting part 15a on the peripheral surface of the rotor 14, and the tilling claw 15 is installed so that rotating locus of the top of the tilling claw 14 is positioned on the outside by a distance D from both ends 14b of the rotor 14. The rotor 14 has a cylinder 14c in which a motor is internally installed and a disk-like blocking member 17 for blocking the cylinder 14c from the side. The blocking member 17 is installed on inner side than both ends 14b of the cylinder 14c. A rotation shaft 14a of the motor is fixed and protrusively installed from center part of a circle of the blocking member 17 to the outside and the rotation shaft 14a is fixed and retained at a lower end 13E of a lower frame 13 of a frame 19. The lower frame 13 is installed on the outside of the rotation locus of the tilling claw 15 and the lower frame 13 is constituted in a state bent so as to protrude by a distance Y from both sides 14b of the cylinder 14c at a position higher by a distance X than the position of a rotation center CL. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric field cultivator that can be operated while walking, and includes a motor, an operation unit that operates the motor, and a cultivation unit that operates the operation unit to transmit the drive of the motor to perform the cultivation work. .

As shown in FIG. 6, a conventional electric field cultivator 1 that can be operated while walking includes a pipe-like upper frame 2 having two grips 2 a at its upper end, and a pipe fixed to the lower end of the upper frame 2. A lower frame 3 formed in a U-shape, a fixed shaft 4 a fixed to the lower frame 3 by a nut 6, and a cylindrical claw shaft 4 rotatably attached to the lower frame 3; A tilling claw 5 fixed on the outer peripheral surface of the claw shaft 4 is provided. The tilling claw 5 is provided such that its tip is located inside the both ends of the claw shaft 4. Further, the lower frame 3 is provided on the outer side so as not to follow the rotation trajectory of the tillage claw 5.
In addition, a motor for rotating the claw shaft 4 is built in the claw shaft 4 and is connected to a battery (not shown) via a main switch and a main clutch.
In order to cultivate the field with the electric cultivator 1 configured as described above, the cultivating claw 5 of the electric cultivator 1 is installed so as to abut on the cultivation surface, the main switch is turned on, and the grip is held with both hands. Pull the lever (main clutch) (not shown). Then, electric power is supplied to the motor, the motor rotates the claw shaft 4, and the tilling claw 5 fixed to the claw shaft 4 rotates to cultivate the cultivated land.

However, in such an electric power tiller 1, the lower frame 3 is formed in a U shape, and the lower portion 3 a is parallel to the side surface 4 b of the cylindrical claw shaft 4, so that the tip is claw shaft 4. The tilling claws 5 must be provided so as to be located on the inner side of the both ends. Therefore, a gap w is formed between the side surface 4 b and the tip of the tilling claw 5. When cultivating the cultivated surface with the electric cultivator 1, the portion of the gap w becomes an uncultivated portion that is not cultivated by the cultivating claw 5, and the claw shaft 4 directly contacts the uncultivated portion. The frictional resistance of the claw shaft 4 with the uncultivated portion is larger than that of the cultivated portion located on the rotation trajectory of the cultivating claw 5, and there is a problem that the traction property and the cultivating property are lowered and the work efficiency is lowered.
Accordingly, an object of the present invention is to provide an electric field cultivator with high work efficiency.

Therefore, the invention described in claim 1 includes a motor, an operation unit that operates the motor, and a tilling unit that operates the operation unit to transmit the drive of the motor and performs a tilling operation. In an electric power tiller that can be operated,
While providing the operation part in the upper part and including a frame for holding the tilling part in the lower part,
The tillage part is composed of a drum-like support part in which the motor is built, and a tilling claw protruding from the peripheral surface of the support part,
The support portion includes a cylinder in which the motor is installed, and a disk-shaped closing member that closes the cylinder from the side, and the rotation shaft of the motor is disposed outward from the central portion of the closing member. An electric field cultivator that protrudes toward and holds the rotating shaft fixed to the lower portion of the frame, and the cylinder is rotatably provided around the rotating shaft;
The tilling nail is provided such that the tip of the tilling nail is positioned outside both ends of the cylinder,
The frame is provided outside the rotation trajectory of the tillage claw, and is configured to be bent so as to project to both sides of the cylinder above the rotation center line of the rotation shaft.

  According to a second aspect of the present invention, in the electric field cultivator according to the first aspect, the closing member is provided inside the both ends of the cylinder.

  According to a third aspect of the present invention, in the electric field cultivator according to the first aspect, the motor is driven by a DC power source, the frame is formed of a pipe, a battery is provided in the pipe, and the motor is driven by the battery. It is characterized by being driven.

  According to a fourth aspect of the present invention, in the electric cultivator according to the third aspect, the battery is a rechargeable storage battery.

  According to a fifth aspect of the present invention, in the electric field cultivator according to the fourth aspect of the present invention, the electric power tiller includes a charge conversion unit that charges the storage battery and converts an AC power source into a desired DC power source. The motor is driven by a direct current power source.

  According to a sixth aspect of the present invention, in the electric field cultivator according to the first aspect, the motor is driven by an AC power source.

According to the first aspect of the present invention, the operation unit is provided at the upper part, and the frame is provided with the frame for holding the cultivation part at the lower part. The cultivation part includes a drum-like support part with a built-in motor and its support. The support part has a cylinder in which the motor is installed, and a disk-like closing member that closes the cylinder from the side. An electric field cultivator with a rotating shaft of the motor projecting outward from the central part of the member, the rotating shaft fixed and held at the bottom of the frame, and a cylinder rotatably provided around the rotating shaft The tilling claw is provided so that the tip of the tilling claw is located outside the both ends of the cylinder, and the frame is provided outside the rotation trajectory of the tilling claw, so that the cylinder comes into contact with the uncultivated part. There is no increase in frictional resistance.
In addition, since the frame is configured to be bent so as to protrude on both sides of the cylinder above the rotation center line of the rotation shaft, even when the tilling part is deeper than the rotation center line of the rotation shaft, The contact of the frame with the cultivated surface can be reduced, and the frictional resistance between the frame and the cultivated soil is not increased.
Therefore, it is possible to provide an electric field cultivator with good traction and tillability and high work efficiency.

According to the second aspect of the present invention, since the closing member is provided on the inner side from both ends of the cylinder, the frame abuts on the cultivation surface even when the cultivation part is deeper than the rotation center line of the rotation shaft by the cultivation work. This can be further reduced, and the frictional resistance between the frame and the cultivated soil is not increased.
Therefore, it is possible to provide an electric field cultivator that has good towability and tillability and higher work efficiency.

  According to the third aspect of the present invention, since the motor is driven by the DC power source, no exhaust is generated compared to the engine-driven field cultivator. Therefore, the field cultivator contributes to the conservation of the natural environment without polluting the air. Can be provided. In addition, since the frame is formed of a pipe, a battery is provided in the pipe, and the motor is driven by the battery, it is possible to provide an electric field cultivator that is easy to move and excellent in operability. In addition, since it is not necessary to separately provide a power source such as a battery, the structure of the apparatus can be simplified and the size of the apparatus can be reduced, and the visibility of the tillage unit during work can be improved.

  According to the invention described in claim 4, since the battery is a rechargeable storage battery, it can be reused, and waste can be reduced to contribute to the conservation of the natural environment.

  According to the invention described in claim 5, since the storage battery is charged and the AC converter is converted to a desired DC power source, the motor is driven by the DC power source converted by the charge converter. In addition to driving with a motor while charging with an AC power supply, you can perform tillage work by cutting off the AC power supply after completion of charging and drive the motor with a storage battery. This makes it easy to work over a wide area. Therefore, it is possible to provide an electric field cultivator with improved workability.

  According to the sixth aspect of the present invention, since the motor is driven by the AC power supply, the tilling work can be performed without worrying about the depletion of the electric power.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view showing an example of an electric power tiller of the present invention, FIG. 2 is a side view of FIG. 1, and FIG.
The electric field cultivator 11 in this example includes a frame 19 including upper frames 12 b and 12 c and a lower frame 13, and a tilling unit 20. The tiller 20 is held at the lower part of the frame 19.
The upper frames 12b and 12c are made of a metallic pipe, and the upper frame 12b is branched in two directions at the upper part, and a grip part 12a is provided at each end thereof, and a position that can be gripped when a hand is put on the grip part 12a. Is provided with a lever (operation part) 12d. The upper frame 12b is detachably connected to the upper end of the upper frame 12c via a connecting portion 18 at the lower end. For example, the connecting mechanism of the connecting portion 18 cuts the outer diameter of the pipe at the lower end of the upper frame 12b to form the stepped portion 12e, and cuts the inner diameter of the pipe at the upper end of the upper frame 12c to form the stepped portion 12f. Alternatively, both may be configured to be fitted. Moreover, in order to make connection of both more reliable, you may provide a locking mechanism in step part 12e, 12f. This lock mechanism uses a known technique for detachably connecting two pipes.

The lower end of the upper frame 12c is fixed to the lower frame 13 by welding or the like. The lower frame 13 is formed in a substantially U-shape, both end portions are bent inward by a bent portion 13a, and the lower end (lower portion) 13E is flattened to form a mounting opening.
The tilling part 20 includes a drum-like rotor (supporting part) 14 and a tilling claw 15 provided on the peripheral surface of the rotor 14 via a mounting part 15a. Specifically, the tilling pawl 15 is formed in a screw shape, and is provided such that the rotation trajectory of the tip of the tilling pawl 15 is positioned outside the both ends 14 b of the rotor 14 by a distance D.
The rotor 14 includes a cylinder 14c in which a motor for rotating the rotor 14 is provided, and a disk-shaped closing member 17 that closes the cylinder 14c from the side. The closing member 17 is provided on the inner side by a distance U from both ends 14b of the cylinder 14c. Further, the closing member 17 does not close the cylinder 14c, but the outer periphery of the closing member 17 and the inner peripheral surface of the rotor 14 are closed with a certain gap. Therefore, the cylinder 14c is rotatable around the rotation shaft 14a of the motor with the closing member 17 fixed.

Then, the rotating shaft 14a of the motor is fixed and protruded outward from the central portion of the closing member 17, and the rotating shaft 14a is passed through the mounting opening of the lower end 13E of the lower frame 13, and then is attached to the nut 16. Secure with screws. A male screw is formed at the tip of the rotating shaft 14a.
Thus, the lower frame 13 is provided on the outer side so as not to overlap the rotation trajectory of the tillage claw 15, and projects toward both ends 14b of the cylinder 14c above the rotation center line CL by a distance X, The bent portion 13a is bent so as to protrude by a distance Y from both ends 14b.

  The motor is fixed to the inside of the cylinder 14 c, and the rotation shaft 14 a of the motor is provided along the rotation center line CL of the cylinder 14 c and is provided so as to penetrate the circle center of the closing member 17. The rotary shaft 14a is passed through the mounting opening formed at the lower end 13E of the lower frame 13 from the inside to the outside, and then the nut 16 is tightened from the tip of the rotary shaft 14a so that the rotary shaft 14a is attached to the lower frame 13. Fix it.

  Further, as shown in FIG. 4, a battery housing part 12g for housing a dry battery (battery) B is provided in the upper frame 12c, and a contact metal is attached so that the cathode of the dry battery B is in contact with the lower end of the battery housing part 12g. On the other hand, a contact metal is attached to the lower part of the upper frame 12b so that the anode of the dry battery B contacts. The battery accommodating portion 12g is configured to accommodate an appropriate amount of the dry batteries B in series so as to secure electric power necessary for driving the motor.

  In order to cultivate the cultivated surface by operating the electric cultivator 11 configured as described above while an operator walks, first, the electric cultivator 11 is arranged so that the rotor 14 is in contact with the cultivated surface. Next, a main switch (not shown) is turned on, the grip portion 12a is gripped, and the lever 12d is gripped. Then, the main clutch is turned on and the motor is driven by the power of battery B. The rotation shaft 14a of the motor is fixed to the lower frame 13, while the main body of the motor is fixed inside the cylinder 14c. Therefore, when the motor is driven, the rotational force of the fixed rotation shaft 14a rotates the motor. . Thereby, the cultivation claw 15 rotates with the cylinder 14c fixed to the motor, and cultivates the cultivation surface.

  At this time, since the tip of the tilling claw 15 is provided so as to be located outside the both ends 14b of the rotor 14 by the distance D, the cultivation surface can be cultivated over the entire width direction of the rotor 14. Further, since the lower frame 13 is bent from the lower end 13E toward the upper portion so as to protrude toward both sides 14b of the cylinder 14c above the rotation center line CL by a distance X, the rotation center is formed. Even when the line CL becomes deeper than the cultivation surface 30, the lower frame 13 does not contact the cultivation surface until the depth Z. Therefore, the resistance of the soil which the rotor 14 receives from a cultivation surface can be reduced.

  When temporarily cultivating the cultivated surface, the hand is released from the lever 12d, the main clutch is turned off, and the drive of the motor is stopped. Further, when ending the tillage work, the main switch is turned off.

  In this example, the closing member 17 is provided on the inner side of both ends 14b of the cylinder 14c, and the lower frame 13 is disposed on both sides of the cylinder 14c from the lower end 13E upward by a distance X above the rotation center line CL. 14b and bent so as to protrude from both ends 14b by a distance Y at the bent portion 13a. However, the present invention is not limited to this, for example, as shown in FIG. The members 17 are provided at both ends 14b of the cylinder 14c, and the lower frame 13 protrudes from the lower end 13E toward the upper side by a distance X above the rotation center line CL toward both sides 14b of the cylinder 14c, and the bent portion 13a. It may be configured to be bent so as to protrude from the both ends 14b by a distance Y. In this case, even when the rotation center line CL becomes deeper than the cultivation surface 30, the lower frame 13 does not contact the cultivation surface up to the depth X. Therefore, the resistance of the soil which the rotor 14 receives from a cultivation surface can be reduced.

  In the above example, the upper frames 12b and 12c are formed of pipes, the motor is driven by a DC power source, the dry batteries B are provided in the upper frames 12b and 12c, and the motor is driven by the dry batteries B. The present invention is not limited to this, and a rechargeable storage battery may be used instead of the dry battery B. In this case, after charging the storage battery using a separate charger, the battery is accommodated in the battery accommodating portion 12g and used.

  Furthermore, while charging a storage battery, the charging conversion part which converts an alternating current power supply into a desired direct-current power supply may be provided, and a motor may be driven by the direct-current power converted by the charge conversion part. In this case, an AC power supply is prepared separately, an outlet is inserted into the AC power supply, and power is taken into the charge conversion unit via a cord. And while charging a storage battery, AC power is converted into DC power and it supplies to a motor. When the outlet is pulled out, DC power is supplied from the stored storage battery to the motor to drive the motor.

  Further, the motor may be driven by an AC power supply instead of the DC battery. In this case, an AC power source is prepared separately, and an outlet is inserted into the AC power source so that electric power is taken into the motor via a cord.

In the above-described example, the upper frame 12b is branched in two directions at the upper portion, and the grip portion 12a is provided at the end, and the operator grips the two grip portions 12a with both hands and uses the electric field cultivator. Although operated, the present invention is not limited to this, and the upper frame 12b may be formed in an annular shape by connecting both ends after branching in two directions at the upper part.
In the above-described example, the electric power tiller has been described. However, the present invention is not limited to this, and may be applied to all working machines such as an electric lawn mower.

It is a front view which shows an example of the electric power tiller of this invention. It is a side view of the electric power tiller shown in FIG. It is a lower detailed drawing of the electric field cultivator shown in FIG. It is a connection part enlarged view of the electric power tiller shown in FIG. It is a partially expanded view which shows another example of the electric power tiller of this invention. It is a front view of the conventional electric power tiller.

Explanation of symbols

11 Electric power tiller 12a Grip part 12b, 12c Upper frame 12d Lever (operation part)
12e, 12f Step part 12g Battery accommodating part 13 Lower frame 13a Bending part 13E Lower end 14 Rotor (support part)
14a Rotating shaft 14b Both ends 14c Cylinder 15 Tillage claw 15a Mounting portion 16 Nut 17 Closure member 18 Connection portion 19 Frame 20 Tillage portion 30 Cultivated surface B Dry cell (battery)
CL Rotation center line D, X, Y Distance Z Depth

Claims (6)

In an electric field cultivator that can be operated while walking, comprising a motor, an operation unit that operates the motor, and a cultivation unit that operates the operation unit to transmit the drive of the motor to perform a cultivation work.
While providing the operation part in the upper part and including a frame for holding the tilling part in the lower part,
The tillage part is composed of a drum-like support part in which the motor is built, and a tilling claw protruding from the peripheral surface of the support part,
The support portion includes a cylinder in which the motor is installed, and a disk-shaped closing member that closes the cylinder from the side, and the rotation shaft of the motor is disposed outward from the central portion of the closing member. An electric field cultivator that protrudes toward and holds the rotating shaft fixed to the lower portion of the frame, and the cylinder is rotatably provided around the rotating shaft;
The tilling nail is provided such that the tip of the tilling nail is positioned outside both ends of the cylinder,
The frame is provided on the outer side of the rotation trajectory of the tillage claw, and is configured to bend so as to protrude to both sides of the cylinder above the rotation center line of the rotation shaft. Cultivator.   The electric cultivator according to claim 1, wherein the closing member is provided inside both ends of the cylinder.   The electric field cultivator according to claim 1, wherein the motor is driven by a DC power source, the frame is formed of a pipe, a battery is provided in the pipe, and the motor is driven by the battery.   The electric power tiller according to claim 3, wherein the battery is a rechargeable storage battery.   5. The battery according to claim 4, further comprising a charge conversion unit that charges the storage battery and converts an AC power source into a desired DC power source, and the motor is driven by the DC power source converted by the charge conversion unit. The electric power tiller described. The electric field cultivator according to claim 1, wherein the motor is driven by an AC power source.

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