JP2012000035A - Electric tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric tiller which is not stopped, even when the hand of an operator is separated from the grip of a hand handle for a short time.SOLUTION: The small electric tiller equipped with an electric motor 8 for driving a rotary portion R for tilling a field is characterized by disposing an operation switch 33 for switching on or off a handle 12a or 12b, and disposing a motor driving control portion set so that the time from the switching-on of the operation switch 33 to the switching-on of a motor 8 is longer than the time from the detection of the switching-on of the operation switch 33 to the switching-on of the motor 8. Therefore, the motor is not switched off, when the operator switches off the operation switch 33 momentarily due to the vibration of the tiller on its turning or the like, and then immediately switch on. Thus, the driving of the motor 8 can be kept, and the electric tiller is not stopped.

Description

  The present invention relates to an electric field cultivator that can easily perform a field work.

  2. Description of the Related Art A conventional electric power tiller is provided with a drive motor that is a power source for rotationally driving a tilling claw, and a push-type mini electric power tiller having an on / off switch of the drive motor provided on a hand handle is known.

JP 2009-34000 A

  The electric field cultivator described in Patent Document 1 is configured to operate by gripping the grip of the push handle so that the on / off switch of the drive motor that rotationally drives the tillage claw is released. And the drive motor stops.

  Therefore, if the hand is released from the grip of the push handle for a moment while plowing while operating the electric field cultivator, the drive motor is turned off and the field cultivator stops immediately. When the drive motor is started again, the extra power is used and the battery capacity is easily consumed.

  Then, the subject of this invention is providing the electric power tiller which does not stop a tiller even if it removes a hand from the grip of a handwheel handle for a while.

The above-mentioned problem of the present invention is solved by the following means.
That is, the invention described in claim 1 is a rotary unit (R) for plowing a field, a motor (8) for driving the rotary unit (R), and a transmission for transmitting the power of the motor (8) to the rotary unit (R). In an electric field cultivator having a shaft (41), a handle grip (13a, 13b) to be gripped by an operator is provided, and the operator grips the handle grip (13a, 13b) in the vicinity of the handle grip (13a, 13b). An operation switch (33) for turning on and off the motor (8) to be operated is provided, and the operation switch (33) is detected from the time from when the operation switch (33) is detected until the motor (8) is turned on. The electric field cultivator is provided with the motor drive control device (100) in which the time until the motor (8) is cut after the cutting of (33) is set long.

  The invention according to claim 2 is a rotary part (R) for plowing a field, a motor (8) for driving the rotary part (R), and a transmission shaft for transmitting the power of the motor (8) to the rotary part (R). (41) is provided with handle grips (13a, 13b) to be gripped by the operator, and the grip state of the handle grips (13a, 13b) by the operator is provided in the vicinity of the handle grips (13a, 13b). An operation sensor (51) for detecting is provided, and the operation sensor (51) detects the gripping state from the time from when the driving sensor (51) detects the gripping state until the motor (8) is turned on. An electric field cultivator is provided with a motor drive control device (100) in which the time until the motor (8) is turned off after being lost is provided.

  According to the first aspect of the present invention, even if the operator leaves the handle grip (13a, 13b) for a moment and cuts the operation sensor (51) due to vibration when the tiller turns, etc., the operator immediately grips and repairs it. By turning on and operating the operation sensor (51), the motor (8) can be kept on without being cut off, and the tilling work can be continued without stopping.

  According to the second aspect of the present invention, the handle grips (13a, 13b) are immediately re-gripped even if the operator removes his / her hand from the handle grip (13a, 13b) for a moment due to vibrations when the tiller turns. Thus, the motor (8) can be kept on without being cut, and the tilling work can be continued without stopping. In addition, the handle (12a, 12b) can be easily gripped during the tillage work.

It is a left view of the electric field cultivator of an embodiment of the invention. It is a rear view of the electric field cultivator of FIG. It is a top view of the electric power tiller of FIG. It is a left view of the electric field cultivator of FIG. It is a left view of the state which folded the handle | steering-wheel of the electric field cultivator of FIG. It is a side view explaining operation of the handlebar grip part of the electric power tiller of FIG. It is a bottom view explaining operation of the handle grip part of FIG. It is the front view (FIG. 8 (a)) and side view (FIG. 8 (b)) of the battery case of the electric power tiller of FIG. FIG. 9 is a bottom view (FIG. 9A) and a side view (FIG. 9B) of the battery case of FIG. 8. It is a top view when the battery case of the electric power tiller of FIG. 1 is removed. It is a control block diagram of the electric power tiller of FIG. FIG. 2 is a system block diagram of a battery unit, a motor, and a monitor unit of a display unit such as an operation state and the charger of the electric power tiller of FIG. 1. It is a flowchart of the motor drive control of the electric power tiller of FIG. It is a perspective view which shows the driving | operation sensor provided in the handlebar grip part of the electric power tiller of FIG. It is a figure explaining the timing of the driving sensor signal of the electric power tiller of FIG. 1, and the driving signal of a motor. Description of the difference in the shape of the charging connector of the circuit block diagram (FIG. 16 (a)) and the battery connecting connector and the battery having a configuration in which the battery for driving the motor of the electric power tiller of FIG. It is a figure (FIG.16 (b)) to do. It is a block diagram of the circuit which uses the battery for a motor drive of the electric power tiller of FIG. 1 in the state which attached the power cord from the commercial power source. It is a block diagram of the circuit which charges the battery for motor drive of the electric power tiller of FIG. 1 from a commercial power source. It is a block diagram of the circuit which charges the battery for motor drive of the electric power tiller of FIG. 1 from a commercial power source. 1 is a control block diagram (FIG. 20 (a)) of a circuit for charging a motor driving battery of the electric power tiller shown in FIG. It is a figure (Drawing 20 (b)) explaining the difference in the shape of a connector.

Embodiments of the walking type electric field cultivator of the present invention will be described below with reference to the drawings.
In this specification, the direction in which the operator with the manual handle of the cultivator advances the cultivator is referred to as the front, the opposite side is referred to as the rear, and the left and right directions are directed to the left and right, respectively. To do.

  A transmission frame 2 having a transmission shaft 41 (FIG. 4) is attached to the front of the machine body frame 1 having a longitudinal direction in the front-rear direction. And the rotary shaft 3 extended in the left-right direction which rotates around the horizontal axis by the transmission of the transmission shaft 41, a plurality of rotary claws 4 attached to the rotary shaft 3 as appropriate, and the side disk 5 attached to the left and right ends of the rotary shaft 3 The rotary part R which consists of is provided.

  A rotary cover 6 having a disk shape in plan view that covers the upper portion of the rotary part R is attached to the upper part of the body frame 1. A U-shaped wall 6a in a plan view is formed at the left and right center of the rotary cover 6, and an opening 6b (FIG. 10) is formed along the inside of the wall 6a. A motor cover 7 is attached to the front half of the opening 6b, and a drive motor 8 (FIG. 3) for transmitting power to the transmission shaft 41 is mounted inside the motor cover 7, and the rear half of the opening 6b. The battery case 9 containing the battery 48 (FIG. 12) is detachably mounted. The drive motor 8 and the battery case 9 are mounted on a mounting table 10 (FIG. 4) attached to the body frame 1 and are disposed through the opening 6 b.

  A front end side of a handle frame 11 extending in the front-rear direction is connected to the rear portion of the body frame 1. The handle frame 11 is inclined so that the rear side faces upward, and left and right operation handles 12a and 12b are branched at the rear end portion of the handle frame 11, and the rear of the left and right operation handles 12a and 12b is provided. Handle grips 13a and 13b for gripping the operator are attached to the ends.

  Further, a support wheel 14 that supports the machine frame 1 when moving the electric tiller and a resistance bar 15 that prevents dashing of the machine during the tilling work are provided at the rear end of the machine frame 1 below the handle frame 11. It is attached.

Next, the driving configuration of the aircraft will be described.
As shown in the rear view of the fuselage in FIG. 2 and the plan view of the fuselage in FIG. 3, a power switch 16 for turning on / off the motor drive power is provided at a position where the operation handles 12a and 12b branch from the handle frame 11, and the grips on either side An operation lever 17 (FIGS. 1 and 6) for turning the motor 8 on and off is provided in the vicinity of 13b. On the rear surface of the battery case 9, an output terminal 18 of the wiring 20 that connects the battery 48 (FIG. 12) in the battery case 9 and the drive motor 8 and a charging terminal 19 for charging the battery 48 are provided. The output terminal 18 and the charging terminal 19 are respectively provided on the left and right sides of the handle frame 11 when viewed from the rear of the machine body, so that the operator can easily attach and detach wiring from the rear side of the machine body on the operation side. . Further, since the output terminal 18 and the charging terminal 19 are arranged separately on the left and right sides with the handle frame 11 in between when viewed from the rear of the machine body, it is easy to understand visually and can prevent errors.

The wiring 20 (FIGS. 1 and 3) for connecting the battery 48 and the motor 8 is between the lower part of the battery case 9 and the lower part of the inclined part 6c formed on the outer periphery of the wall part 6a of the rotary cover 6 and the mounting table 10 described later. It is configured to pass through space.
The battery case 9 has a handle 9a formed on the upper surface, a plurality of position fixing feet 9b formed on the lower surface, and the position fixing feet 9b inserted into the position fixing holes 10a (FIG. 10). By doing so, the mounting position of the battery case 9 is fixed. As shown in FIG. 10, the left and right side surfaces of the battery case 9 are supported by the wall portion 6a of the rotary cover 6, and an elongated convex portion 9c (FIG. 4) for fixing the position is formed on the front surface. The portion 9c is configured to be engageable with a long and narrow recess 7a for fixing the position formed in the motor cover 7. Further, an opening 10b (FIG. 10) is provided at the left and right center of the mounting table 10, so that water that has flowed into the mounting table 10 with rainwater or the like can be temporarily stored in the opening 10b.

  Further, as shown in FIGS. 8 to 10, when the battery case 9 is set on the fuselage, the position-fixing protrusion 9c is inserted into the position-fixing recess 7a and is lowered as it is. Is inserted into the position fixing hole 10a of the mounting table 10 and the position of the battery case 9 is fixed. When the battery case 9 is taken out, it can be taken out simply by pulling up the handle 9a.

  The battery case 9 of the present embodiment is supported by the motor cover 7 on the front side and the wall portion 6a of the rotary cover 6 on the front side, but the wall portion 6a may be formed separately from the rotary cover 6. For example, it is good also as a structure which forms the wall part 6a attached to the mounting base 10 side. Further, by forming the wall portion 6a so as to be inclined upward, the support of the battery case 9 can be strengthened and the aesthetic appearance of the entire body can be improved. A rear support wall 6d (FIG. 2) is formed on the back side of the battery case 9 to support the battery case 9 from the back side. The rear support wall 6d is formed lower than the wall 6a that supports the side surface of the battery case 9, and the output terminal 18 and the charging terminal 19 are exposed to the rear side of the fuselage so that the output terminal 18 and the charging terminal 19 are connected. It is easy to connect.

Next, the operation safety device T of the operation lever 17 will be described mainly with reference to FIGS.
The operation lever 17 (17a, 17b) is configured to rotate around a horizontal shaft 30 provided on a cover member 29 having an inverted U-shape so as to cover a part on the base side of the handle 12b. It consists of a switch operating portion 17a formed on the front side of the horizontal shaft 30 and a gripping portion 17b formed on the rear side of the horizontal shaft 30. A spring 25 (FIG. 7) for returning the operating lever 17 to the initial position after the switch operating portion 17a is rotated downward by gripping the gripping portion 17b of the operating lever 17 includes a protrusion 30a integrated with the horizontal shaft 30 and a cover member. Connect to 29 appropriate locations.

  A moving shaft 31 (31a, 31b, 31c) is provided at a position where the wall surface of the cover member 29 at a position behind the horizontal shaft 30 is penetrated. The moving shaft 31 is supported in a direction (left-right direction) intersecting the gripping portion 17b, and is arranged on the wall surface of the cover member 29 so as to slide in the left-right direction. The moving shaft 31 is formed with a small diameter portion 31a and a large diameter portion 31b adjacent to each other in order from the inside of the machine body. The operation safety device T is constituted by these members 29 to 31 and the like. And it is set as the structure which the large diameter part 31b is located on the rotation locus | trajectory of the holding part 17b in the initial position of the operation safety apparatus T (refer Fig.7 (a)). Further, a pushing portion 31c for pushing the moving shaft 31 toward the outside of the body is formed at the inner end of the moving shaft 31, and a spring is applied to the moving shaft 31 between the pushing portion 31c and the wall surface of the cover member 29. 35 is wound.

Further, a limit switch (operation switch) 33 for turning on / off the driving of the motor 8 is provided on the cover member 29. A limit switch 33 is provided at a position where the switch operating portion 17a is pressed when the switch operating portion 17a is rotated downward by gripping the gripping portion 17b of the operating lever 17.
Thus, the operation safety device T of the operating lever 17 includes the switch operating portion 17a, the gripping portion 17b, the spring 25, the cover member 29, the horizontal shaft 30, the moving shaft 31 having the small diameter portion 31a, the large diameter portion 31b, and the pushing portion 31c. The limit switch 33 and the spring 35 are provided.

The operation at the time of tillage work of the operation lever 17 and the safety device T in the above configuration will be described below.
When the power switch 16 (FIG. 1) is turned on and the pushing portion 31c is pushed with the thumb, the moving shaft 31 moves laterally toward the outside of the machine body, the large diameter part 31b moves to the outside of the machine body, and the small diameter part 31a is operated. It is located on the turning locus of the lever 17 (see FIG. 7B). When the operator grips the gripping portion 17b, the switch operating portion 17a and the gripping portion 17b are rotated to a position where the limit switch 33 is turned on, and the motor 8 is driven to rotate the rotary portion R to perform the tilling work. (See FIG. 6 (b)). When the plowing work is started, the gripping portion 17b and the small diameter portion 31a are in contact with each other, and the operator releases the push portion 31c to stop the gripping portion 17b from returning to the initial position of the large diameter portion 31b. Tilling work can be continued with the portion 17b gripped.

  When stopping the tilling work, when the operator releases the gripping portion 17b, the switch operating portion 17a is rotated to the initial position by the action of the spring 25, the limit switch 33 is turned off, and the rotary portion R is stopped (FIG. 6C). )reference). Further, the moving shaft 31 moves to the inside of the machine body by the action of the spring 35 and returns to the initial position.

  Even when the operator carries the electric power tiller with the power switch 16 turned on, even if the operator suddenly abuts on the grip 17b of the operation lever 17 and the grip 17b rotates, the grip 17b is moved. The switch operating portion 17a does not rotate to the position where the limit switch 33 is engaged by contacting the large diameter portion 31b of the 31 and the limit switch 33 does not enter (see FIG. 6A). The rotary portion R does not rotate unless the gripping portion 17b is operated while the push portion 31c is pressed. Therefore, the rotary portion R unexpectedly moves when the operator is carrying the power switch 16 without knowing that the power switch 16 is on. It is safe because it does not rotate.

  A control block diagram centering on the control device 100 of the electric power tiller of the present embodiment is shown in FIG. 11, and a secondary battery (battery) 48 provided with a charging circuit and a discharging circuit, a motor 8 and a display unit such as an operating state. FIG. 12 shows a system block diagram of the control device 100 showing the relationship between the monitor unit and the like. The motor 8 is connected to a secondary battery 48 composed of a charging circuit 45, a discharging circuit 46 and a plurality of battery cells 47, and an operation signal is generated when the limit switch (operation switch) 33 is turned on and supplied to the discharging circuit 46. Then, current is supplied from the battery 48 to rotate the motor 8. The battery cell 47 for driving the motor of the secondary battery 48 can be charged by a charger 50 provided separately.

  In this embodiment, as shown in the flowchart of FIG. 13, the time from when the limit switch (running switch) 33 is detected to when the motor 8 starts to drive is instantaneous, and after the limit switch 33 is turned off, the motor The time until 8 stops is set to 2 to 3 seconds. That is, the determination time (T1) for turning on the limit switch 33 is short (T1: start immediately), and the determination time (T2) for off is long (T2> T1).

  Thus, even when the operator temporarily releases the handle grip 13b and the gripping portion 17b by vibration or turning operation during tilling during the tilling operation of the electric power tiller, the handle grip 13b is immediately turned off even if the limit switch 33 is turned off. Then, the work can be continued without stopping the motor 8 by re-holding the grip 17b and turning on the limit switch 33. Therefore, since it is not necessary to perform restarting, it is possible to suppress a decrease in capacity of the battery 48 and to prevent deterioration of the battery cell 47 (high current discharge). This control can be performed by, for example, the microcomputer 100 of FIG.

Further, as shown in FIG. 14, instead of the limit switch 33, an operation sensor 51 for detecting a human body is provided in the handle grips 13a and / or 13b, and the tiller can be operated when the handle grips 13a and / or 13b are gripped. You may make it become. As the operation sensor 51, for example, a capacitance type detector is used. In this case, the ON / OFF timing chart of the signal of the operation sensor 51 and the operation signal of the motor 8 has a relatively short determination time (T1) from the input of the signal of the operation sensor 51 to the start of operation of the motor 8 as shown in FIG. The determination time (T2) from turning off the signal of the operation sensor 51 to stopping the operation of the motor 8 is set to be relatively long (T2> T1). Therefore, if the handle grips 13a and / or 13b are gripped at the start of work, the operation sensor 51 detects the operator's hand, and the motor 8 is immediately activated. Also, even if the operation sensor 51 does not detect the hand even if the hand is temporarily separated from the handle grip 13a and / or 13b during vibration or turning during the tillage operation, the operator can immediately detect the handle grip 13a and / or 13b. When the operation sensor 51 is turned on, the tilling operation can be continued without stopping the motor 8.
In the case of this embodiment, the operator can operate the cultivator simply by holding or releasing the handle grips 13a and / or 13b without operating the limit switch 33. Driving operation becomes easy.

The control configuration of the present invention is based on the circuit of FIG. That is, in the circuit configuration of FIG. 12, the motor 8 is connected to the secondary battery 48 composed of the charging circuit 45, the discharging circuit 46, and the plurality of battery cells 47, and the operation signal is generated when the operation switch 33 is turned on. The electric current is supplied from the battery 48 and the motor 8 is rotated. Then, the battery 48 is charged by the charger 50.
As another embodiment of FIG. 12, a battery 48 can be charged using a DC power supply circuit 52 that operates with a commercial AC power supply instead of the charger 50 as shown in the circuit block diagram of FIG. .

In FIG. 16 (b), a battery 48 comprising a secondary battery is charged from a commercial AC power source via a connection connector 52a to a DC power source charger 52, and the secondary battery (battery of the tiller) is charged from the charger 52. ) 48 charging connectors 48a are configured to be charged. The DC power supply charger 52 is provided with a voltage changeover switch 52d, which outputs, for example, DC 24V when used as a power source, and outputs DC 30V, for example, when used as a charger 52.
Alternatively, as shown in FIG. 17, there is a configuration in which a power cord 53 is attached to a connection connector 52 a from a commercial AC power source, and a tilling operation is performed with the power cord 53 attached. Although not shown in the figure, a charging circuit may be provided in the DC power supply charger 52 and charged by attaching a power cord 53, and the power cord 53 may be removed so that a tilling operation can be performed.

In the case of using a DC power source that operates with an electric commercial AC power source as shown in FIG. 16 instead of using the secondary battery shown in FIG. 12 as the charger 52, as shown in the block diagram of FIG. The output circuit of the DC power supply can be protected by sequentially connecting a transformer circuit, a smoothing circuit, a stabilizing circuit, a discharge circuit, and a short-circuit prevention circuit from a commercial power supply of AC 100V and providing an output short-circuit protection circuit.
In addition, as shown in the block diagram of FIG. 19, with the output short circuit protection circuit, when the load current exceeds a specified value, a detection circuit for the current flowing through the motor 8 that cuts the output and an output limiting circuit are provided, When the load current exceeds a specified value, the output circuit of the DC power supply can be protected.

  Further, as shown in the control block diagram of FIG. 20 (a) and FIG. 20 (b), the secondary battery (battery) 48 is charged from the commercial AC power source via the connection connector 52a to the DC power source charger 52, When the charger 52 is configured to charge the charging connector 48a of the secondary battery (battery) 48 of the tiller, the outer case of the DC power supply charger 52 is provided with a slit 52c to provide a heat dissipation effect. By adopting a configuration that improves the heat dissipation effect, it is possible to suppress a temperature rise of the DC power supply circuit and to expect a stable operation. Discharge connectors 48b and 52b are provided next to the charging connector 48a of the secondary battery (battery) 48 and the connection connector 52a of the DC power supply charger 52, respectively.

Further, as shown in FIG. 20B, both charging connectors can be obtained by changing the shapes of the charging connector 48a of the secondary battery (battery) 48 and the commercial AC power supply connector 52a of the DC power supply charger 52. It is possible to prevent the battery circuit from being damaged by mistaken use of 48a and 52a.
In the case of the embodiment shown in FIGS. 16 to 20, no dedicated device for charging is required.

Next, the configuration when the operator carries the electric field cultivator will be described below.
As shown in FIG. 5, the adjustment screws 36 (FIG. 1) for fixing and adjusting the front and rear positions of the left and right operation handles 12a and 12b are loosened to move the operation handles 12a and 12b around the pivot point 36a of the horizontal axis. Tilt to the front of the machine and tighten the adjustment screw 36 (FIG. 3) to fix the position. Then, the connecting rod 38 that connects the left and right operation handles 12a and 12b is configured to be positioned at the approximate center of the longitudinal direction of the fuselage at the approximate center of gravity of the fuselage and above the battery case 9. The operator can prevent the battery case 9 from being detached when carrying the electric tiller by carrying the connecting rod 38 or the connecting rod 38 and the bumper 39 at the front end of the machine body. In addition, the connecting rod 38 is configured to be substantially gate-mounted when viewed from the front when the left and right operation handles 12a and 12b are tilted forward, and the left and right operation handles 12a and 12b are moved downward without contacting the battery case 9. It can be defeated. At the time of carrying the electric tiller, the bucket 40 attached to the position covering the lower part of the rotary part R is attached to the machine body with a band (not shown) or the like, and the soil adhering to the rotary part R falls, It is possible to prevent the soil from being scattered around.

Next, the configuration of the front / rear balance of the electric power tiller of the present embodiment will be described below.
The axial center of the motor shaft 8a of the motor 8 arranged in the vertical direction is configured before the axial center position of the rotary shaft 3, and a battery case 9 is provided behind the axial center position of the rotary shaft 3. The handle frame 11 is provided at the rear. With this configuration, the center of gravity is taken near the battery case 9, and even if the capacity of the battery 48 accommodated in the battery case 9 is changed to change the weight of the battery case 9, the change in the center of gravity of the body is small.

Next, the configuration of the LED display unit will be described below.
In the vicinity of the power switch 16, a plurality of LED display portions 26 (FIG. 3) showing various operation states are provided. In the present embodiment, a power on / off LED display unit 26a, an operation on / off LED display unit 26b, and a battery remaining amount LED display unit 26c are provided. In the LED display unit 26a that is turned on and off, the first color green is emitted when the power switch is turned on, and when the overload is detected and a protection circuit (not shown) provided in the wiring 20 is activated, the second color is obtained. Red light is emitted. When the rotary switch R is driven by turning on the limit switch 33 in the on / off LED display portion 26b, the first color green is emitted, and a protection circuit (not shown) by a temperature sensor built in the motor 8 is provided. When activated, the second color, red, emits light. When the remaining amount of the battery 48 is normal, the LED indicator 26c for the remaining battery level emits green, which is the first color, and emits red, which is the second color, when the remaining amount is less than the set amount.

  In this way, various operation states are displayed on the LED display unit 26, and many operations can be displayed with a small number of LEDs by appropriately changing the color from the first color to the second color. By arranging the LED display unit 26 at a position that is easy to see from the operation side, it is easy to check various driving situations. Further, since the LED display unit 26 is provided adjacent to the power switch 16, the LED display unit 26 can be easily confirmed at all times when the power is turned on.

  Although this embodiment has been described with an electric power tiller, it may also be used for a walking-type working machine that uses other energy that does not have a driving sound.

DESCRIPTION OF SYMBOLS 1 Airframe frame 2 Transmission frame 3 Rotary shaft 4 Rotary claw 5 Side disk 6 Rotary cover 6a Wall part 6b Opening part 6c Inclination part 6d Rear support wall part 7 Motor cover 7a Recessed part 8 Drive motor 8a Motor shaft 9 Battery case 9a Handle 9b Foot 9c Convex portion 10 Mounting table 10a Hole 10b Opening portion 11 Handle frames 12a and 12b Operation handles 13a and 13b Handle grip 14 Support wheel 15 Resistance rod 16 Power switch 17 Operation lever 17a Switch operation portion 17b Holding portion 18 Output terminal 19 Charging terminal 20 Wiring 25 Spring 26 LED display unit 26a LED display unit 26b for turning on / off power LED display unit 26c for turning on / off operation LED display unit 29 for remaining battery level Inverted U-shaped cover (member)
30 Horizontal axis 30a Protrusion 31 Movement axis 31a Small diameter part 31b Large diameter part 31c Push part 33 Limit switch (operation switch)
35 Spring 36 Adjustment screw 36a Rotation fulcrum 38 Connecting rod 39 Bumper 40 Bucket 41 Transmission shaft 45 Charging circuit 46 Discharging circuit 47 Battery cell 48 Secondary battery (battery) 48a Charging connector 48b Discharging connector 50 Charger 51 Operation sensor 52 DC power supply charger 52a connection connector 52b discharge connector 52c slit 52d voltage changeover switch 53 power cord 100 control device T operation safety device R rotary part

Claims (2)

Electric unit provided with a rotary part (R) for tilling the field, a motor (8) for driving the rotary part (R), and a transmission shaft (41) for transmitting the power of the motor (8) to the rotary part (R) In the field cultivator
Provide handle grips (13a, 13b) to be held by the operator,
In the vicinity of the handle grips (13a, 13b), there is provided an operation switch (33) for turning on and off the motor (8) operated by the operator while gripping the handle grips (13a, 13b).
The time until the motor (8) is turned off after the operation switch (33) is turned off is set longer than the time from when the operation switch (33) is detected until the motor (8) is turned on. An electric field cultivator comprising a motor drive control device (100). Electric unit provided with a rotary part (R) for tilling the field, a motor (8) for driving the rotary part (R), and a transmission shaft (41) for transmitting the power of the motor (8) to the rotary part (R) In the field cultivator
Provide handle grips (13a, 13b) to be held by the operator,
An operation sensor (51) for detecting a gripping state of the handle grip (13a, 13b) by an operator is provided in the vicinity of the handle grip (13a, 13b),
From the time until the motor (8) is turned on after the operation sensor (51) detects the gripping state, the motor (8) is turned off after the operation sensor (51) stops detecting the gripping state. An electric field cultivator comprising a motor drive control device (100) in which a long time is set.

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