JP2006115777A - Electric tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric tiller solving the problems of conventional electric tiller to control the rotation of a motor simply by on-off operation and fail in sufficient response to various works having different load and quick movement of the tiller, and having a compact structure to prevent the obstruction of work in the case of constituting a speed changing operation tool. <P>SOLUTION: An electric motor 4 is mounted on an electric tiller and the rotational output of the motor 4 is transmitted through a gear transmission to a tilling shaft 3 to drive a tillage tine 2. A plate member 12 connected with the right and left handle frames 6, 6 of the tiller is provided with a dial setter 13 and the set position of the dial setter 13 is inputted to a controller to change the rotational output of the electric motor 4 according to the set position. The gear transmitter is provided with a speed changing device to change the rotational speed of the electric motor to a vehicle speed suitable for traveling. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a walking type electric power tiller that drives a power tiller with an electric motor.

2. Description of the Related Art Conventionally, a walking type electric power tiller that drives a tilling rotor by an electric motor to plow a field is known. In a conventionally known electric field cultivator, the rotation of the tillage rotor is turned on and off by turning the switch on and off.
Japanese Patent Laid-Open No. 10-136704 Japanese Patent Laid-Open No. 11-168901

  As in the conventional example, if the rotation of the tilling rotor is simply turned on and off by simply turning the switch on and off, there is a drawback that it cannot handle various work with different loads. As a result, there is a problem that the operability is deteriorated due to the inability to move quickly.

  The present invention is to solve the above-mentioned problems, can sufficiently cope with various works with different loads, enables a quick movement by making the moving speed faster than the working speed by shifting operation, and The purpose is to improve operability.

In the present invention, an electric field cultivator is configured as follows in view of the above problems.
That is, according to the first aspect of the present invention, in the electric field cultivator that transmits the rotation output of the electric motor (4) to the field shaft (3) and drives the field pawl (2), the handle frame (6) of the field cultivator is provided. An electric field cultivator comprising a dial setting device (3) and control means for changing the rotational output of the electric motor (4) in accordance with a setting position of the dial setting device (13).

  At the time of work, the electric motor (4) is driven and the dial of the dial setting device (13) provided on the handle frame (6) is turned to set the desired work speed. As a result, the rotational output of the electric motor (4) is shifted according to the set position, and the tilling shaft (3) is shifted to a rotational speed suitable for a predetermined working speed, and the load is different. Improved compatibility with various tasks.

  According to a second aspect of the present invention, there is provided an electric cultivator according to the first aspect, wherein the rotation output of the electric motor (4) is transmitted to the tillage shaft (3) via the gear transmission and the tillage claw (2) is driven. In addition, the electric power tiller (2) is steplessly changed by the electric motor (4), and the electric power tiller is changed stepwise by the gear transmission (16).

  The rotation output of the electric motor (4) can be steplessly changed according to the setting position of the dial, but, for example, a low working speed and a high moving speed can be obtained via the gear type transmission (16). It is possible to change gears in stages. Therefore, switching to a low working speed during tillage work and switching to a high moving speed during movement can provide a large working speed range, while switching to a high speed side allows for faster speed. It can be moved.

  In short, according to the invention of claim 1, the rotational output of the electric motor (4) can be changed according to the setting position of the dial setting device (13), so that it can accurately cope with various operations with different loads. Even when moving, it can be moved quickly by a shifting operation to the high speed side. Moreover, since the dial setting device (13) is installed on the handle frame (6), there is an advantage that it is easy to handle and easy to handle even in an emergency.

  In addition, according to the invention of claim 2, while having the effect of the invention of claim 1, since the electric motor (4) uses a continuously variable transmission, a subtle working speed at the time of work can be obtained, and the gear type In the case of shifting via the transmission (16), it is possible to switch between a low working speed and a high moving speed in stages, thereby obtaining a large working speed range during work. At the same time, when moving, it is possible to move more quickly by switching to the high speed side.

  The electric field cultivator of the present invention will be described below with reference to the drawings.

  FIG. 1 and FIG. 2 show a so-called axle tillage type electric power tiller for walking. This electric field tiller 1 is an electric motor that rotationally drives a tillage shaft 3 to which a plurality of tilling claws 2, 2. 4, a gear case 5 that houses a gear-type transmission that also serves as a speed reduction mechanism, left and right handle frames 6 and 6 projecting rearward and upward from the gear case 5, and a battery 8 that is mounted on the upper front of the body frame 7 And a stand 9 projecting downward from the front part of the body frame 7 and a resistance bar 11 attached so as to be vertically adjustable from the hitch part 10 at the rear part of the body frame 7.

  Further, the left and right handle frames 6 and 6 are connected to each other via a connecting plate 12 extending in the left and right lateral directions in the vicinity of the rear end grip portions 6a and 6a, thereby improving the rigidity of the handle itself. 12, various display lamps 15, 15,... For displaying the rotation state of the dial setting device 13 for controlling the motor rotation, the motor tachometer 14, and the motor 4, and for notifying when the battery charge amount is low The battery 8 is configured to include a warning alarm 40 that issues a warning when the amount of power stored in the battery 8 decreases. In addition, these electrical devices 13, 14... And the wiring that is transmitted to the controller and the battery are configured to be routed along the lower surfaces of the left and right handle frames 6 and 6.

  In addition, a portable holder 48 for engaging and holding the cellular phone is provided on the side of the dial setting device 13. As a result, the incoming state of the mobile phone can be easily seen, and it can be picked up directly when the incoming call is received.

  The electric motor 4 is installed in the upper part of the gear case 5 and is mounted in the gear case 5 with the motor output shaft 20 facing downward, and the output rotation can be steplessly changed by an energization command from a controller 26 described later. It is configured. Further, in the gear case 5, sun gears 21 and 23 and a planetary gear G1 are respectively provided between an output gear 21 fixed to the motor output shaft 20 and an input gear 23 fixed to the drive shaft 22 to the tilling shaft 3. ~ G4 and a planetary gear mechanism having a carrier and the like are provided to reduce the transmission power. The power transmitted to the drive shaft 22 is transmitted to the tilling shaft 3 via a bevel gear mechanism 24.

  The electric motor 4 is slightly rearwardly inclined so that the output shaft 20 of the electric motor 4 and the drive shaft 22 in the gear case 5 connected to the lower portion of the electric motor 4 are positioned rearward of the tilling shaft 3 in a side view. A configuration in which the battery 8 is mounted, that is, a configuration in which the electric motor 4 and the battery 8, which are heavy objects, are disposed on the front and rear sides of the tilling shaft 3 to maintain the front-rear balance. A control plate 25 is erected and supported from the gear case 5 via a bracket between the electric motor 4 and the battery 8, and a controller 26 for controlling the operation of the electric motor 4 is attached to the front surface of the control plate 25. . Thereby, the heat generated from the electric motor 4 can be avoided as much as possible, and the durability can be improved.

  Near the grip 6a of the handle frame 6, a lever-type power switch 27 that sends electricity to the electrical equipment such as the electric motor 4, the controller 26, and various lamps, and the power switch 27 can be tilted forward and backward. Accordingly, a so-called clutch lever 28 for turning on and off the output rotation of the electric motor 4 is provided. Specifically, the clutch lever 28 is provided with a spring S at the lever rotation base and urged forward of the machine body, and can be positioned rearward by a lever guide against the urging force. A potentiometer 30 is provided at the base of the lever 28, and the detected value is sent to the controller 26. Thus, the clutch lever 28 is configured to stop the output rotation of the electric motor 4 when tilted forward and output the rotation set by the dial setting device 13 when tilted backward.

  Further, as shown in FIG. 3, the dial setting device 13 has a configuration in which a reverse rotation position is arranged on one side and a forward rotation position is arranged on the other side with a “0” position at which the motor output rotation is stopped. It is configured so that it can be set steplessly. The set position is transmitted to the controller (control means) 26, and the output rotation of the electric motor 4 is steplessly changed in accordance with the set position. Note that the scales such as “1st speed”, “2nd speed”, “3rd speed”, and “4th speed” in FIG.

  The dial setter 13 is equipped with the following safety device. That is, the dial 13 is configured to be movable in the direction of the shaft 33 via the compression spring 32 as shown in FIGS. 4 to 6, and a torque spring 34 is provided on the rotating shaft 33 portion. The dial operating position returns to the “0” rotation position via the torque spring 34. When the dial 13 is pushed in the axial direction in an emergency, the dial 13 is moved to the “0” rotation position. Then, the output of the electric motor 4 is stopped. 4 denotes a potentiometer that detects the set position of the dial 13 and is configured to be supported on the back surface stay portion 12s of the connecting plate 12.

  Further, a case-like cover member 41 is provided on the back side of the connecting plate 12 so as to cover the back side of the device such as the potentiometer 25 and the motor tachometer 14 so that the device is waterproofed.

  Further, as shown in FIG. 2, the upper part of the fender 42 is a wide (front view) transmission (deceleration) gear case 5, the lower part is a wide rotor drive case 43, and the gaps between the cases 5 and 43 are narrowly recessed. With this configuration, the adjacent tilling claws 2 and 2 can be passed through the recesses 44a and 44b close to each other, which is suitable for the residual tillage treatment.

The main cover 45 that covers the battery 8 and the side of the motor 4 is configured to be openable and closable with respect to the sub-cover 46 that covers the upper side of the motor.
A holder 47 for receiving a beverage can or the like is installed inside the base portion of the handle frame 6. Thereby, the said drink can etc. can be hold | maintained in the low position stabilized as much as possible in the position where an operator can reach easily during an operation | work.

  In the electric field cultivator 1 configured as described above, the rotational output of the electric motor 4 can be changed according to the setting position of the dial setting unit 13, so that it is possible to accurately cope with various operations with different loads. Further, since the dial setting device 13 is installed on the handle frame 6 via the connecting plate 12, that is, it is installed at a place where the operator's hand operating the tiller 1 can reach, the operability is good, and in an emergency. But there is an advantage that it is easy to deal with.

Next, based on FIG. 11 thru | or FIG. 15, the electric power tiller 1 'provided with the traveling wheel 52 and the tiller R will be described. Note that description of members common to the first embodiment is omitted.
This electric field cultivator 1 ′ includes an AC induction electric motor 51 mounted in a main cover 46, and a structure in which a power supply wiring support rod 53 is erected above a gear case 5 on which left and right traveling wheels 52, 52 are installed. It has become.

  Moreover, as shown in FIG. 14, in the cultivation house using the electric field cultivator 1 ′, a rail 55 that crosses the house is laid at the center of the ceiling portion, and the cord 54 enters and exits the rail 55 by tension. A reel 56 is slidably attached to the rail 55 via a roller 57. Then, the cord reel 56 is connected to an AC power source, and the power cord 54 extending from the cord reel 56 is extended to the electric power tiller 1 ′ and connected to the electric motor 51 via the power wiring support rod 53. To do.

  In the electric cultivator 1 ′ configured as described above, cultivating is started from one end side of the house. The power cord 54 is stretched from the ceiling side forward in the straight direction, and when it reaches the other end side of the house, the cord is stretched from the rear ceiling side of the course that has traveled straight. The electric power cultivator 1 'turns the direction 180 degrees and shifts to the next stroke tillage work.

  Further, the cord reel 56 of the power source is located in the center of the house and can be slid horizontally so as to approach the electric power tiller 1 ', so that the cord length is shortest and can be stretched in the air. Therefore, the cord 54 does not hang down and is not easily twisted, and the power can be supplied stably. Also, only one rail 55 needs to be laid on the ceiling, and preparation work is reduced.

  More specifically, the configuration of the electric power tiller 1 ′ will be described in more detail. The electric motor 51 at the front of the machine body includes an inverter and is connected to the upper front surface of the gear case 5 in which the gear-type transmission mechanism 16 is housed. The motor output shaft 51a is inserted into the upper part of the motor 5 so as to transmit power to the bevel gear 58 in the upper part of the case 5. Thereby, a transmission structure becomes simple and can comprise a body compactly and can improve visibility.

  Further, in the gear case 5, as shown in FIG. 13, a gear-type transmission mechanism 16 that slides the high and low two-stage gear 16a and switches the meshing gear with the driven gears 16b and 16b is configured. The slide gear 16a is slid in the axial direction through a mechanical interlocking member such as a wire by a tilting operation of the shift lever 60 provided. The selected transmission power is transmitted to the traveling wheel 52 via a transmission belt.

  The electric field cultivator 1 ′ has a handle frame 6 projecting rearward from the upper part of the gear case 5, supports a control box 59 by bridging between the left and right handle frames 6, 6. The shift lever 60, the power switch 61, the reverse lever 62, etc. are concentrated together with the dial setting device 13 ′ that sets the output rotation of the electric motor 51 steplessly from the stop state “0” position to the maximum speed state MAX position. It is the composition to arrange. In the same box 59, a controller 26 'for sending electricity to the electric motor 51 and the like is built in, and the signals of the setting device 13' and the switch 61 on the box 59 are inputted to the electric motor 51 and various lamps. It is the structure which transmits a signal to etc.

In the electric cultivator 1 ′ configured as described above, the rotation of the electric motor 51 is switched between forward and reverse by the reverse rotation lever 62, and the rotation speed of the cultivating claw 2 is set by the dial setting device 13 ′.
As a result, the gear-type transmission 16 can switch the rotational speed in a stepwise manner between a low working speed suitable for work and a high speed suitable for movement. In addition to being able to handle subtle work speeds in combination with 13, it is possible to move quickly by switching to the high-speed gear during movement.

  As another form using the first embodiment and the second embodiment, the dial setting device 13 (13 ') may be provided in the grip 6a portion of the hand frame 6, or the other via a bracket member. It is good also as a structure with which the flame | frame 6 is equipped. Further, in a field where the speed change mechanism 16 in the gear case 5 is provided with a reversing mechanism and it is necessary to improve the crushed property, the tilling claw 2 is reversed and upcut tilling is performed. The claw 2 may be rotated forward so that it can be cultivated by down-cutting. Furthermore, in the gear case, a mechanism for reversing only a part of the tiller shaft 3 may be configured, and the tiller R may be a so-called partial reverse rotary tiller.

The side view of the electric power tiller of Example 1. FIG. The front view of an electric power tiller and the top view of a handle frame upper part. The top view of a dial setting device. Sectional drawing (1) which shows the attachment state of a dial setting device. Sectional drawing (2) which shows the attachment state of a dial setting device. The shaft part top view of a dial setting device. The guide top view of a clutch lever. The side view of a clutch lever. The front view which carried out the cross section of the support part of a clutch lever. The block diagram which shows the connection state of a controller. The perspective view of the electric power tiller of Example 2. FIG. The side view of the principal part of an electric power tiller same as the above. The top view of a principal part same as the above. The layout of an electric power tiller showing the work system in the house.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric cultivator 2 Cultivation claw 3 Cultivation shaft 4 Electric motor 5 Gear case 6 Handle frame 8 Battery 12 Connection plate 13 Dial setting device 16 Gear transmission 20 Motor output shaft 22 Drive shaft 26 Controller

Claims (2)

In the electric field cultivator that transmits the rotation output of the electric motor (4) to the tillage shaft (3) and drives the tillage claw (2), the handle frame (6) of the field cultivator includes a dial setting device (3). An electric field cultivator comprising control means (26) for shifting the rotational output of the electric motor (4) in accordance with a set position of the dial setting device (3). An electric field cultivator that transmits the rotation output of the electric motor (4) to the tillage shaft (3) via a gear transmission and drives the tillage claw (2). The electric field cultivator according to claim 1, wherein the rotation of (2) is steplessly changed and the gear type transmission (16) is changed stepwise.

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