JP2003061432A - Electric lawn mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric lawn mower capable of maintaining the weight balance of the mower by arranging a battery at the upper part of an electric motor, since the arrangement of the battery which is a heavy material, affects the handling performance of the mower, and as a result, capable of aiming at the improvement of operational and working properties of the electric lawn mower. SOLUTION: This electric lawn mower surrounding a cutter blade 23 with a cutter housing 21, installing the electric motor 22 at the upper part of the cutter housing 21 and driving the electric motor 22 with a rechargeable battery 26 is provided by arranging the battery 26 at the upper part of the electric motor 22.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for charging an electric motor.
It relates to an electric lawn mower of the type that can be driven by a battery. 2. Description of the Related Art As an electric lawn mower, for example, Japanese Patent No. 288
No. 0116 “Power Head Assembly for Electric Mower”
And Japanese Patent Application Laid-Open No. Hei 10-257814, entitled "Electric Lawn Mower"
Are known. The above is, according to FIG.
An electric motor 70 is attached to the housing 24,
Back and forth the batteries 40 and 42 so as to sandwich the motor 70
It is arranged. The above is described with reference to FIG.
For example, the electric motor 28 is attached to the cutter housing 21,
Behind the electric motor 28 and the electric motor 28
The battery 29 is held between the front ends of the batteries 291 and 292.
1, 292 are arranged. [0003] However, the above-mentioned electric
In a power head assembly for a mower, the electric motor 70
The batteries 40 and 42 are arranged back and forth so that
The heat generated by the electric motor 70 and the battery 4
The heat generated from 0, 42 causes mutual interference. Therefore,
The electric motor 70 and the batteries 40 and 42 are mutually
It may hinder each heat radiation. Also, the above electric
In the lawnmower, a battery 291,
Since 292 were placed, the weight balance of the electric lawn mower was lost.
As a result, the operability of the electric lawn mower may deteriorate.
May be invited. Therefore, an object of the present invention is to operate an electric lawn mower.
Improve workability and release heat from batteries and electric motors
It is to provide a technology for promoting promotion. [0005] In order to achieve the above object,
The cutter blade is surrounded by the cutter housing.
The electric motor is mounted on the upper part of the cutter housing.
Electric turf that drives this electric motor with a chargeable battery
In the mower, the battery is placed above the electric motor.
It is characterized by having. [0006] Among the components constituting the electric lawn mower, an electric lawn mower is electrically driven.
It is well known that motors and batteries are heavy.
You. Also, in general, electric motors
The center of the cutter housing
Place in the part. So, with the placement of the heavy battery
This affects the good or bad handling of the electric lawn mower.
Therefore, place the battery on top of the electric motor.
The aim is to secure the weight balance of the electric lawn mower. This too
Thus, the operability and workability of the electric lawn mower are improved. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings.
This will be described below. Note that "before", "after",
"Left", "Right", "Top" and "Bottom" are directions viewed from the worker
Fr is the front side, Rr is the rear side, L is the left side, R is the right side
Is shown. Also, the drawings should be viewed in the direction of reference numerals. FIG. 1 is a perspective view of an electric lawn mower according to the present invention.
Yes, 10 is an electric lawn mower, 11 is a fuselage, 12 is a front wheel, 1
3 is a rear wheel, 14 is a glass bag, 15 is a glass cover,
16 is a handle, 21 is a cutter housing, 27 is a cover.
-Member, 28 is an operation mechanism, 41 is power ON / OFF
Key 42 as a connecting member for connecting
73, a relay member as an insertion port for inserting and removing 41
Denotes an operation lever, and 74 denotes a clutch mechanism. According to the present invention
The electric lawn mower 10 uses a battery as described below.
Secures weight balance by being placed above the dynamic motor
It is a lawn mower which aimed at. FIG. 2 is a view taken in the direction of arrow 2 in FIG.
10 shows a side view. The electric lawn mower 10 is attached to the
The electric motor 22 is turned on by inserting and removing the key 41
・ Off-control the cutter housing with this electric motor 22
The grass is cut by turning the cutter blade 23 in 21,
The body 1 from the scroll part 31 in the cutter housing 21
1 Send the cut grass to the rear, and place the cut grass in a glass bag 14
This is a rear-discharge type electric lawn mower that is collected at the site. FIG. 3 is a view taken in the direction of the arrow 3 in FIG.
10 shows a side view. The electric lawn mower 10 is connected to the relay member 42.
The main key 41 is inserted, and the operation mechanism 28 shown in FIG.
The dynamic motor 22 is turned on, and this electric motor 22
Rotate the cutter blade 23 as shown in
Mowing the grass with the blades 23 and rotating the cutter blade 23
Of cutting grass with cutter swirl 21
The part 31 is fed into the glass back 14 as shown by the arrow b. That is, the electric lawn mower 10 is
By inserting and removing the main key 41, the electric motor 22
On / off control is performed, and the cutter motor is
Grass by turning the cutter blade 23 in the cutting 21
The scroll part 31 in the cutter housing 21
Send the cut grass to the back of the body 11, and put the cut grass in a glass bag
In the electric lawn mower of the type collecting at 14, scrolling
The part 31 is arranged on one side of the airframe 11 on the left or right side.
The relay member 42 for inserting and removing the key 41 is attached to the body 11
It can be said that it is arranged on one side. Generally, a mowing is performed from the scroll portion to the rear of the machine.
Rear to send the cut grass and collect this cut grass in a glass bag
With a discharge-type electric lawn mower, the mowing
Regularly clean the scroll part because the grass adheres
The need for a structure that makes the scroll part easy to clean is desirable.
It is. Therefore, the scroll part 31 is moved to the left or right
Of the main key 41
By arranging the joining member 42 on the other side of the body 11,
The person turns around the fuselage 11 and inserts and removes the main key 41.
No, in this state the aircraft 12 is turned over
The rule 31 can be cleaned. That is, work
The user inserts and removes the main key 41 from the side of the
Perform the two tasks of turning the aircraft 12 sideways without changing the location
This can improve the workability of the cleaning operation.
Hereinafter, the configuration of the electric lawn mower 10 will be described in detail. FIG. 4 is an exploded perspective view of the electric lawn mower according to the present invention.
FIG. 2 shows main components of the electric lawn mower 10. electric
The lawn mower 10 includes a cutter housing 21 and the cutter housing 21.
An electric motor 22 attached to the housing 21;
Blade 2 attached to the motor shaft 22a of the motor 22
3, a control unit 24 disposed above the electric motor 22,
From above the electric motor 22 and the control unit 24,
A battery bracket 25 attached to the housing 21;
A battery 26 mounted on the bracket 25 and
Electric motor 22, control unit 24, battery bracket 2
A cover member 27 that collectively covers the battery 5 and the battery 26;
Operation mechanism 28 for ON / OFF controlling electric motor 22
And consisting of The battery bracket 25 is electrically driven.
When attaching the motor 22 to the cutter housing 21,
I fixed it. The cutter housing 21 is attached to the main body 21a.
Forming an opening 21b for mounting the electric motor 22,
Boss 2 for fixing electric motor 22 to main body 21a
1c ... (... indicates a plurality; the same applies hereinafter)
When the rotation of the cutter blade 23 is allowed in the body portion 21a
In both cases, the cut grass is cut by the grass bag
Formed with a scroll portion 31 to be conveyed to the
You. Further, the electric motor 22 is connected to the cutter housing 21.
The cutter housing 21 is attached to the boss 21c.
Forming communication holes 32 ... (only one is shown) communicating inside and outside
To achieve. The control unit 24 includes a control case 34
And the control board 3 housed in the control case 34
The control board 35 has an electric motor.
Component of the operating mechanism 28 for controlling the
The electric lawn mower 10 can be operated by connecting the non-contact switch 36
Always on to inform the operator that
Connect the indicator light 37 to run the aircraft 11 and perform various operations.
A buzzer 38 that constantly sounds is connected. Ma
The main key 41 for turning on the power is provided.
The relay member 42 into which the main key 41 is inserted is provided.
I can. Note that the relay member 42 is a connector
As described above, the connection portion for charging the battery 26
Doubles as well. The battery bracket 25 is made of a metal material.
Formed on the side and above the electric motor 22
And a main body 25a covering the main body, and extending from the main body 25a.
Extending portion 25b, and the aforementioned
The cutter housing 2 includes a mounting bracket 29.
1 is fixed together with the electric motor 22.
You. Also, 25c and 25d are formed on the main body 25a.
An opening for ventilation, 25e, was formed in the extension 25b.
It is an opening for ventilation. As described above, the electric lawn mower 10 is
Battery housing 25 and electric
It can be said that the motor 22 and the motor 22 are fixed together. You
That is, a battery bracket is provided on the cutter housing 21.
25 and the electric motor 22 are fastened together,
The assemblability of the mower 10 can be improved. The battery 26 is a nickel-cadmium battery.
System batteries, the first and second upper batteries 44, 4
5. First and second upper batteries 4
4, 45 have a rated voltage of 1.2
V cells 46...
Place it horizontally on the main body 25a of the terry bracket 25
Was. The battery 26 is preferably a high performance battery.
In addition to nickel-cadmium batteries,
Using other nickel or lithium batteries
Good. Generally, nickel-based or lithium-based batteries
It is known that temperature control during charging is easy. So
Here, replace the battery with nickel-based or lithium-based battery.
To improve workability of charging work.
it can. The cover member 27 is a member formed of resin.
There is a cover with a louver 47 at the lower front,
A ventilation hole 27a is formed at the rear, and the relay member 4 is formed at the left side.
2 is formed with an escape portion 27b for opening the second hole. Ma
In addition, the louver 47 has an opening 47a for circulating air.
Was formed. FIG. 5 is a sectional view taken along line 5-5 in FIG.
2 shows a side cross section of the lawn mower 10. The electric lawn mower 10 is
The blade 23 is surrounded by the cutter housing 21 and
The electric motor 22 is mounted on the upper part of the
Electric motor 22 is driven by a rechargeable battery 26
In the electric lawn mower, the battery 26 is
It can be said that it is arranged at the upper part of. Among the components constituting the electric lawn mower, an electric
It is well known that motors and batteries are heavy.
You. Also, in general, electric motors
The center of the cutter housing
Place in the part. So, with the placement of the heavy battery
This affects the good or bad handling of the electric lawn mower.
Therefore, the battery 26 is arranged above the electric motor 22.
To secure the weight balance of the electric lawn mower 10
You. With this, the operability and workability of the electric lawn mower 10 are improved.
To improve. The electric lawn mower 10 charges the body 11.
Equipped with a battery 26 that can be
The motor 22 is rotated, and the electric motor 22
An electric motor for rotating the cutter blade 23 in the housing 21
In the lawn mower, the electric motor 22 and the battery 26 are connected together.
A cover member 27 for covering and covering
Is an upward slope from the front to the rear of the body 11 in a side view.
And an opening 47a is formed in the lower front part,
In addition, by forming a ventilation hole 27a at the rear, an opening 47a is formed.
The battery 26 is ventilated from the
Or a structure that cools the electric motor 22
Can also be said. The electric motor 22 and the battery 26 are collectively
Cover member 27 in front of body 11 in side view.
Formed in an upward gradient from the rear to the front of the cover member 27.
An opening 47a is formed in the lower part, and a ventilation hole 27a
To form The ventilation hole 27a is ventilated from the opening 47a.
Cooling the battery 26 or the electric motor 22
You. Thereby, the battery 26 or the electric motor 22
To prevent excessive heat generation and extend the length of the electric lawn mower 10.
It can withstand continuous use for a long time. FIG. 6 is a sectional view taken along the line 6-6 in FIG.
With the cover member 27 (see FIG. 5) of the lawn mower 10 removed.
1 shows a state lawn mower. The electric lawn mower 10 is a cutter
Body 21 that covers the side and upper part of the electric motor 22
25a and forward from both sides of the electric motor 22
Bracket 2 having extended portion 25b extended
5 is attached to the main body 25a of the bracket 25.
・ Even if the second upper batteries 44 and 45 are mounted
I can say. That is, the main body of the battery bracket 25
The first and second upper batteries 44 and 45 are mounted on the portion 25a.
Therefore, the first and second upper batteries 44 and 45 and the electric motor 2
Air can easily flow between the two. This result
As a result, the first and second upper batteries 44 and 45 and the electric motor 22
Can be promoted. The electric lawn mower 10 includes a battery bracket 2
5 and the battery bracket 25
With openings 25c, 25d, 25e for wind
It can be said that there is. The battery bracket 25 is made of metal.
And an opening for ventilation in the battery bracket 25
25c, 25d, and 25e, the electric motor 2
2 and the batteries 44 and 45
Can be. The first and second upper batteries 44, 45
Are respectively attached to the battery bracket 25 by the elastic belts 49.
b, 49c indicate that the fixing was performed. FIG. 7 shows a control system for an electric lawn mower according to the present invention.
FIG. 3 is a system diagram, and a control system 50 of the electric lawn mower is
The control unit 24 for controlling the motor 22 and the battery
And a charger 51 for charging the battery 26.
You. The circuit configuration of the control unit 24 interrupts overcurrent.
And the operation of the electric lawn mower 10
Control block 56 to control
Thermistor 57 for monitoring the temperature of the battery 26 and thermistor
Thermal breaker 5 that stops charging based on data
8 and both the main key 41 and the charger 51
Comprising the relay member 42 which can be inserted and removed in a compatible manner.
You. The control unit 24 controls the temperature of the battery 26 during charging.
Is monitored by the thermistor 57. That is, the battery 26
It has a temperature management control function. Control unit 2
4 has a battery temperature management control function,
The reliability during electric power can be improved. As a result,
The life of the battery can be extended. The control block 56 is an electric motor
The motor control circuit 61 for controlling the motor 22 and the indicator light 37 are turned on.
A lighting circuit 62 for lighting and a buzzer for driving the buzzer 38
And a drive circuit 63. The indicator light 37 is an LED
(Light emitting diode). The motor control circuit 61 controls the electric motor 22
A control circuit for turning on / off the electric motor 22
The non-contact switch 36 of the operating mechanism 28 (see FIG. 4)
Connected. The lighting circuit 62 detects that the voltage of the battery 26 is
When the voltage just before the memory effect described above is exceeded
When the indicator light 37 is constantly turned on and the voltage falls below the voltage
Is a circuit for turning off the indicator light 37. That is,
The voltage of the cell 26 does not become lower than 0.97V / cell.
As long as the indicator light 37 is always on.
You. For example, an electric motor using the battery 26 as a driving source
The lawn mower 10 (see FIG. 5) immediately before receiving the memory effect
An indicator light 37, which is always lit when the voltage exceeds
The operator can turn on the indicator light 37 of the electric lawn mower 10.
When the light is on, the operation is continued, and the indicator light 37 turns off.
If you stop working and charge the battery 26
Good. That is, the voltage of the battery 26 is applied to the electric lawn mower 10.
Exceeds the voltage immediately before receiving the memory effect
By providing an indicator light 37 that is always lit, the
The charging time of the battery 26 is notified accurately. With this
The short life of the battery 26 can be prevented. The buzzer drive circuit 63 controls the electric motor 22
A circuit that always sounds the buzzer 38 during rotation.
Buzzer when the voltage of the coil 26 falls below the preset voltage
This is a circuit for stopping the operation of -38. That is, the electric lawn mower 10 (see FIG. 5)
Is equipped with a rechargeable battery 26 in the fuselage 11,
The battery 26 is used as a drive source to drive the airframe 11 and perform various operations.
In the electric lawn mower that performs the business, the running of the body 11 and various
Equipped with a buzzer 38 that constantly sounds during work
It is said that it was intended to inform the worker of something.
I can. Generally, an electric motor drive type working machine
Has a much lower noise level than engine-driven work equipment.
Low. Therefore, such an electric lawn mower is noisy.
When using in an environment, make sure that the electric lawn mower is operating.
In some cases, it is difficult to judge sensuously. That is,
The moving of the body 11 and various operations are performed on the moving lawn mower 10 (see FIG. 5).
Attach a buzzer 38 that keeps ringing during
The electric lawn mower 10
The workability and handleability can be improved. The electric lawn mower 10 (see FIG. 1)
The user 38 determines that the voltage of the battery 26 falls below a preset voltage.
It can be said that the operation stops when it turns
You. The buzzer 38 operates when the voltage of the battery 26
By stopping operation when the pressure drops below
Unnecessary consumption of the battery 26 can be prevented. The relay member 42 has six connection terminals.
A connector, the first terminal C1 (positive
In the figure, C1 is simply displayed as "1". The same applies below)
Connected to the positive electrode of the battery 26 through the flow cutoff circuit 55,
The negative terminal of the battery 26 and the control terminal are connected to the second terminal C2.
Connect one end of lock 56 and control to terminal 3 C3
And connect the other end of the
One end of the breaker 58 is connected, and thermistor is connected to the fifth terminal C5.
Connect one end of the thermal breaker to the 6th terminal C6.
The other end of 58 and the other end of the thermistor 57 are connected.
is there. The main key 41 includes a pair of electrically connected keys.
Pins P1, P3 (in this figure, P1 and P3 are simply "1",
(Indicated as "3"), comprising a relay member
42 by inserting it into the first terminal C1 and the third terminal C3.
With a plug that shorts between terminal C1 and terminal C3
is there. The charger 51 is connected to the charging member connected to the relay member 42.
Appliance side plug 52 and power plug connected to household power supply
53. The charger-side plug 52 is connected to the relay member 42.
1st terminal C1, 2nd terminal C2, 4th terminal C4, 5th terminal
No. 1 pin for connecting to terminals C5 and 6
R1 (in the figure, R1 is simply indicated as "1".
2nd pin R2, 4th pin R4, 5th pin R5 and 6
A plug having a pin R6 for charging the battery 26.
It is a plug for charging. From the above, the relay member 42
Connect both the main key 41 and the charger side plug 52
It can be said that it is a connector that can be plugged and unplugged. That is, the electric lawn mower 10 is
2 is connected to a charger 51 for charging the battery 26.
Connection part is provided integrally. Relay member 42
Is connected to a charger 51 for charging the battery 26.
For example, when discharging,
Insert the connecting member (main key 41) into the relay member 42,
At the time of charging, the charger 51 may be inserted into the relay member 42,
Prevents erroneous insertion during charging or charging
You. As a result, when the electric lawn mower 10 is discharged or charged.
The convenience at the time can be improved. In the electric lawn mower 10, the relay member 42 is
Has a positive terminal (terminal No. C1) connected to the positive electrode of
The positive terminal is connected from the charger 51 to the positive terminal of the battery 26.
That also serves as the positive terminal for charging
It can be said that there is. The positive terminal (terminal C1) is the charger 5
Positive charging terminal connected from 1 to the positive electrode of battery 26
The control unit 24 and the relay member 4
2 can be simplified. As a result, the electric lawn mower
10 can be reduced in cost. The electric lawn mower 10 (see FIG. 5)
A rechargeable battery 26 is mounted on the body 11 and this battery
The electric motor 22 is rotated by the
2 is controlled by the control unit 24 so that the airframe 11 travels and
In the electric lawn mower performing the work of
A relay member 42 is interposed between the relay unit 24 and the
Using a connecting member (main key 41) to be inserted into the material 42
By inserting this connecting member into the relay member 42,
The battery 26 and the control unit 24 are connected, and the connecting member is connected to the relay member 4.
2 separates the battery 26 from the control unit 24
It can be said that it was done. A relay section between the battery 26 and the control section 24
A member 42 is interposed, and a contact for inserting into the relay member 42 is provided.
A connection member (main key 41) is prepared, and this connection member is
By inserting the battery 26 and the control unit 24 into the joint member 42,
Connecting. Also, the connection member is removed from the relay member 42,
Separate battery 26 and control unit 24
To completely shut off the control unit 24 from the battery 26
Can be. This will help reduce discharge when not in operation.
And prevent overdischarge during long-term storage.
You. As a result, the life of the battery 26 can be extended.
You. FIG. 8 shows a battery for an electric lawn mower according to the present invention.
5 is a graph showing the life of the device. The horizontal axis is the depth of discharge (%), the vertical
The axis is the number of charge / discharge cycles. Where the discharge depth and
Indicates the depth of discharge of the battery, expressed as a percentage
I do. For example, when the battery capacity is 100,
When the discharge is performed, the depth of discharge is indicated as 100%. Ma
The number of cycles indicates the number of times the battery can be charged and discharged.
You. Nickel-cadmium batteries are fully discharged
Recovers the capacity even if the
It is a strong battery. However, when complete discharge is repeated, battery
Causes a reduction in the life of the metal. For example, a discharge depth of 100
(%), That is, battery cycle when complete discharge is repeated
The number is 500 to 800 times and the discharge depth 50 (%) is sufficient.
When the discharge is repeated, the number of battery cycles is 1700.
Extends to ~ 1800 times. FIG. 9 shows a battery for an electric lawn mower according to the present invention.
6 is a graph showing a memory effect of the first embodiment. The horizontal axis is the discharge time (m
in), the vertical axis is the battery voltage (V). Nickel
With cadmium batteries, shallow charge / discharge is repeated
After deep discharge, the voltage at discharge drops by two steps
Phenomenon is known. This is called a memory effect. Graph
Medium, battery voltage 1.3 until discharge time 60 (min)
Gently drops to 1.1 (V). But when discharging
When the time exceeds 60 (min), the battery voltage drops sharply
I do. 8 and 9 show that the battery is used for a long time.
First, do not repeat complete discharge. Second,
Do not repeat only shallow discharges that cause the moly effect.
When. We need to pay attention to these two items. Sandals
That is, charge / discharge at an appropriate depth of discharge is desired. Empirically, a battery rated at 1.2 V / cell
Then, the discharge end voltage causing the memory effect is set to 1.1 V /
The electric lawn mower 10 (see FIG. 1) is assumed to be a cell
Aiming to set the threshold voltage to 1.1 V / cell or less,
Battery voltage does not drop below 9.7V / cell
An indicator light 37 (see FIG. 5) that is always lit as long as possible is provided. Returning to FIG. 5, the electric lawn mower 10
Has a rechargeable battery 26 mounted on the fuselage 12,
Using the battery 26 as a drive source, the vehicle body 12 travels and various operations are performed.
Charge and discharge cycle for electric lawn mowers
When performing deep discharge after repeating, the voltage at the time of discharge becomes
When the phenomenon of two steps is called the memory effect,
The voltage of the cell 26 exceeds the voltage immediately before receiving the memory effect.
With an indicator light 37 that is always lit when
It can be said that there is. That is, the battery 2 is attached to the electric lawn mower 10.
6 exceeds the voltage immediately before receiving the memory effect.
By providing an indicator light 37 that is always lit when
Tell the contractor exactly when to charge the battery 26,
This can prevent the battery 26 from having a short life.
Wear. The mechanism of heat dissipation of the electric lawn mower 10 described above.
An example of nism will now be described. FIGS. 10 (a) and (b)
It is operation | movement explanatory drawing of the electric lawn mower concerning this invention, (a) is
The air flow when the electric lawn mower is in operation is shown.
5 shows the air flow immediately after the mower stops. In FIG.
While the moving lawn mower 10 is operating, the cutter blade 23 rotates to cut the blade.
The inside of the housing 21 becomes negative pressure. Therefore, louver 4
7 open air 47a (see FIG. 4) as shown by the arrow.
Pull the electric motor 22 into the cutter housing 21
From the communication hole 32 (see FIG. 4)
Flows into the housing 21. On the other hand, the cover member 27
The outside air is drawn from the ventilation hole 27a of
From the communication hole 32 (see FIG. 4), the cutter housing 21
Flow into. In the air flow indicated by the arrow ~, the first
-Forcing of the second upper batteries 44 and 45 and the electric motor 22
Cooling can be achieved. In (b), when the electric lawn mower 10 is
After that, the first and second upper batteries 44 and 45 and the electric motor 2
2 is in an exothermic state. Therefore, an arrow is drawn from the communication hole 32.
The first and second upper batteries 44 and 45 or the electric
1st and 2nd upper cover by natural convection passing around motor 22
The batteries 44 and 45 and the electric motor 22 can radiate heat.
it can. In addition, the opening 47 of the louver 47
a (see FIG. 4) to the ventilation hole 27a of the cover member 27.
Air flow like the mark can be expected, further promoting heat dissipation
Can proceed. That is, the electric lawn mower 10 is
A communication hole 32 communicating with the cover member 27 is formed in the jing 21.
The opening 4 is provided by rotating the cutter blade 23.
7a (see FIG. 4) and the cutter housing from the ventilation holes 27a.
And the blade 2
3 while the electric motor 22 or the first and second upper batteries
The heat from the cutter housing 21 causes the ventilation holes 2
7a. FIG. 11 shows an operating device for an electric lawn mower according to the present invention.
It is a side sectional view of a structure. The operating mechanism 28 includes the electric motor 2
2 (see FIG. 2) to turn ON / OFF the handle 16
Of the left side of the handle 16
Bracket 71 attached and attached to this bracket 71
The non-contact reed switch 36 and the reed switch
Main part for determining ON / OFF state of switch 36
(Kanamebu) 72a is rotatably attached to the bracket 71.
A tongue-shaped tongue-shaped member 72, and the tongue-shaped member 72 is rotated.
Operating lever 73 for operating the
To engage or disengage the tongue member 72
H mechanism 74. Note that 71a is a tongue piece member 72.
Attached to the bracket 71 to rotatably support the
It is a support pin. The non-contact reed switch 36 is a magnetic switch.
A tongue member 72
Is formed of an iron-based metal, so that the tongue piece member 72 is
The magnetic flux generated by moving closer to or away from the magnet 36a
The change is detected and the ON / OFF state of the reed switch 36 is detected.
Is determined. 36b is a non-contact type lead
The connection from the switch 36 to the control unit 24 (see FIG. 4)
Harness. The operation lever 73 has a U-shaped
A bar, the left end of which is a handle via a bracket 71
16 is rotatably attached to the handle 16 and the right end is
I installed it. The clutch mechanism 74 rotates around the bracket 71.
A lever portion rotatably mounted coaxially with the operation lever 73
Material 76 and a flange rotatably attached to the lever member 76.
Hook member 77 and one end of the hook member 77 can be rotated.
To the other end of the clutch lever 76
Hook drive rod 78 slidably mounted on 76a
And tension applied between the hook member 77 and the support pin 71a.
The spring 79a and the tongue for fitting the hook member 77
An engagement pin 72b provided on the one-sided member 72;
A tension spring 79b biased between the brackets 71;
Constitute. Reference numeral 78a denotes a drive knob of the hook drive rod 78.
It is. FIG. 12 shows an operating device for an electric lawn mower according to the present invention.
It is a front sectional view of a structure. Electric lawn mower 10 (see FIG. 5)
Has an electric motor 22 mounted on the body 11 and
The cutter blade 23 is driven by the
The handle 16 (see FIG. 1) is extended to
6. Operation mechanism 28 for turning on / off electric motor 22
In the electric lawn mower provided with the
-Contact reed switch that controls the on / off of the data 22
36 and the on / off state of the reed switch 36.
The main part 72a is rotatably mounted on the handle to secure
The fan-shaped tongue member 72 and the tongue member 72 are rotated.
It can be said that the operation lever 73 is composed of For controlling on / off of the electric motor 22
A non-contact type reed switch 36 is provided in the
Fan tongue to determine the on / off state of switch 36
The main part 72a of the member 72 is rotatably attached to the handle 16.
So that the tongue piece member 72 is rotated by the operation lever 73.
did. The non-contact reed switch 36 has a fan-shaped tongue
Rotate the member 72 to turn on / off the electric motor 22
To improve switch operation reliability.
Can be planned. In addition, the non-contact reed switch 36
By rotating the fan-shaped tongue piece member 72 in the
Set a wide range of ON or OFF state of 6
be able to. As a result, the freedom of design can be increased.
Can be. Further, it operates with the non-contact reed switch 36.
By bringing the lever 73 close to the operation lever 73, the
Therefore, a simple and direct structure can be realized. The electric lawn mower 10 is provided with an operation lever 73.
Between the operating member 73 and the tongue member 7
2. A clutch mechanism 74 for engaging or disengaging the
It can be said that it was interposed. Operation lever 73 and tongue piece member
Between the operating lever 73 and the tongue piece member 72
The clutch mechanism 74 for disengaging or disengaging is interposed
To prevent switch ON / OFF malfunctions
Can be. As a result, the operation of the electric lawn mower 10 (see FIG. 2) is performed.
The workability can be improved. The operation of the operation mechanism 28 described above will be described.
You. FIGS. 13A to 13C show an electric lawn mower according to the present invention.
It is operation | movement explanatory drawing of an operation mechanism. In (a), the electric motor
Of the operation mechanism 28 before rotating the motor 22 (see FIG. 5).
Indicates the status. Non-contact reed switch 3
6 near the magnet 36a.
The mode of the switch 36 indicates that the switch has been set to the OFF state.
You. Further, the clutch mechanism 74 is provided with an engagement pin of the tongue piece member 72.
Since the hook member 77 is not bitten by the
State. That is, in this state, the operation lever
Even if 73 is rotated as shown by the arrow a, the tongue piece member 72 rotates.
Absent. That is, the mode of the reed switch 36 is set to OF
Since the F state does not change to the ON state, the electric motor 22
Does not rotate. In (b), the hook driving rod 78 is
Pressing as in b1, the engagement pin 72b of the tongue piece member 72
Then, the hook member 77 is bitten as shown by the arrow b2. This bite
The operating handle 73 together with the lever member 76 is
Is rotated as shown by the arrow b3, so that the tongue piece 72
Rotate as indicated by mark b4. In addition, the tongue piece member 72
In the position, the tongue piece 72 is still a non-contact reed switch.
36 magnet 36a, the lead
The mode of the switch 36 is OFF. In (c), the operation handle 73 is
As a result of the rotation as shown by c1, the tongue piece member 72 is
The switch 36 is separated from the magnet 36a. Sandals
That is, the mode of the reed switch 36 is turned on.
Then, the rotation of the electric motor 22 is started. In the embodiment, as shown in FIG.
The battery 26 is composed of the first and second upper batteries 44 and 45.
However, the number of batteries is not limited to this.
Optional. According to the present invention, the following effects are exhibited by the above configuration.
I do. The electric lawnmower can be installed with the heavy battery
Affects good or bad surroundings. Therefore, claim 1
Now, since the battery is located above the electric motor,
The weight balance of the electric lawn mower can be ensured.
As a result, the operability and workability of the electric lawn mower are improved.
be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electric lawn mower according to the present invention. FIG. 2 is a view as viewed in the direction of arrow 2 in FIG. 1. FIG. 3 is a view as viewed in the direction of arrow 3 in FIG. FIG. 5 is an exploded perspective view of the electric lawn mower. FIG. 5 is a sectional view taken along line 5-5 in FIG. 1. FIG. 6 is a sectional view taken along line 6-6 in FIG. 1. FIG. 8 is a graph showing the life of the battery of the electric lawn mower according to the present invention. FIG. 9 is a graph showing the memory effect of the battery of the electric lawn mower according to the present invention. FIG. 11 is a side sectional view of the operating mechanism of the electric lawn mower according to the present invention. FIG. 12 is a front sectional view of the operating mechanism of the electric lawn mower according to the present invention. FIG. 13 is an operation of the electric lawn mower according to the present invention. Description of operation of mechanism [Description of reference numerals] 10 ... electric lawn mower, 11 ... body, 21 ... cutter housing, 22 ... electric motor, 23 Cutter blade, 26 ...
Battery.

Continuation of front page    (72) Inventor Kenzo Shimada             1-4-1 Chuo, Wako-shi, Saitama Stock Association             Inside the Honda Research Laboratory (72) Inventor Toshiaki Takizawa             1-4-1 Chuo, Wako-shi, Saitama Stock Association             Inside the Honda Research Laboratory F-term (reference) 2B083 AA02 BA01 BA12 CA09 DA03                       HA17 HA19

Claims (1)

Claims: 1. A cutter blade is surrounded by a cutter housing, and an electric motor is mounted on an upper portion of the cutter housing.
An electric lawn mower in which the electric motor is driven by a chargeable battery, wherein the battery is disposed above the electric motor.