JPH07177810A - Unmanned lawn mower - Google Patents

Abstract

PURPOSE:To provide an unmanned lawn mower almost free from noise, not generating dust being accompanied lawn mower and free from possibility of worsening surrounding environment and capable of carrying out unmanned traveling having high safety. CONSTITUTION:This lawn mower is equipped with a solar cell 12, an electric motor 3 operated by electric power obtained by the cell 12, a decelerating mechanism for driving wheels 1 and 2 and a nipping type cutter 8 at an ultra- low speed by extremely decelerating a motor output, an electric actuator 7 for steering and a controlling means for automatically controlling this electric actuator 7. The lawn mower moves on the turf at extremely low speed by unmanned manner so as to crawl to mow lawn slowly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn mower capable of unmanned cutting of lawn grass in home gardens and parks.

[0002]

2. Description of the Related Art Conventionally, lawn mowers for unmanned lawn mowing work are those in which the vehicle body is run unmanned along a guide line buried in the ground, laser beams, etc. There are known ones that are moved, or ones that store a traveling route by manned driving and allow the vehicle to run unmanned along the traveling route, that is, an unmanned traveling by a so-called teaching playback system.

[0003]

Generally, lawnmowers are constructed by equipping a vehicle body equipped with an engine, which is a power source, with a lawn mowing device that rotates at a high speed. There was a problem. Airframe noise, especially engine noise, is large. A lot of dust is generated from the lawnmower that rotates at high speed. Since fossil fuels such as gasoline and light oil are used, the engine exhaust easily deteriorates the surrounding environment. In order to control the traveling of the airframe, it is necessary to perform complicated control with high responsiveness in consideration of collision with another object, runaway, etc.

The present invention has been made by paying attention to such a situation, there is almost no noise, no dust is generated by lawn mowing, and there is no fear of deteriorating the surrounding environment.
Moreover, it is an object of the present invention to provide an unmanned lawn mower capable of highly safe unmanned traveling.

[0005]

In order to achieve the above object, an unmanned lawn mower according to the present invention is provided with a solar cell, an electric motor operated by the electric power obtained by the solar cell, and an ultra decelerating motor output. A configuration is provided that includes a speed reducing mechanism that drives a wheel and a clipper type cutter at a low speed, an electric actuator that operates a steering device, and a control unit that automatically controls the electric actuator.

[0006]

With the above structure, the electric motor is actuated by the solar energy obtained from the solar cell to allow the machine body to run at a very low speed, while a clipper type cutter such as a clipper type cutter that also operates at an extremely low speed is used. Leave it while cutting the grass. At this time, the position of the machine body is detected by using an appropriate means such as laser, infrared ray, or ultrasonic wave, and the steering device is operated to move it along a predetermined route set beforehand, or the target turf is moved. By moving it along a guide line buried in the ground, mainly during the daytime, it moves so as to crawl around the grass, and the grass is mowed over time.

[0007]

Since the unmanned lawnmower of the present invention is constructed and operates as described above, the following effects can be expected. Since the engine is not used as a power source, there is almost no noise. Since the turf is sandwiched and cut by a clipper type cutter at an extremely low speed, no dust is generated. Since no fossil fuel is used, there is no generation of combustion exhaust,
It does not make the environment worse. Since the aircraft runs at a very low speed, it is easy to avoid collision with other objects or runaway without controlling the responsiveness to a high level, and there is very little risk of damage or damage to the aircraft. Easy to perform high control.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in the schematic configuration diagrams of FIGS. 1 and 2, an unmanned lawn mower according to the present invention includes front and rear wheels 1 and 2, electric motors 3 for propulsion, a motor output that is extremely decelerated, and wheels 1 and 1.
2, a deceleration mechanism 4 for transmitting to the wheel 2, differential mechanisms 5 and 6 for the wheels 1 and 2 of the wheels, an electric motor 7 for operating the rear wheel 2 for steering, and a clipper-type cutter laterally arranged at the front of the machine body. The hair clipper cutter 8, the battery 9, the control device 10 using a microcomputer, and the like are housed in the casing 11, and the solar cell 12 is attached to the entire outer surface of the casing 11. The cutter 8 is driven in association with the rotation of the wheel 1.

The unmanned lawnmower having the above-mentioned structure is provided with, for example, a laser, an infrared ray, an ultrasonic wave, which is arranged at an appropriate position on the lawn.
Other suitable guide signals are received by the receiving means such as the detection antenna 13 to detect the current body position, and the clipper type cutter 8 while unmanned moving the grass at an extremely low speed along a preset route.
You will be slowly mowing the grass.

In this case, when the electric power generated by the solar cell 12 is surplus, the electric power is stored in the battery 9 and used for work in the shade or in the cloudy day or at night. Also,
When the charged amount of the battery 9 becomes equal to or less than the set value, the work is interrupted and the power supply from the solar cell 12 is awaited.

Further, when the casing 11 is opened or the machine body is turned upside down, the operation of the hair clipper type cutter 8 is stopped so that the safety is high.

The present invention can be implemented by being modified into the following forms. (1) The control device 10 is arranged and fixed in a proper place outside the machine, and the machine body is equipped only with a driver circuit for receiving a control signal from the control device 10 by radio and operating the electric motors 3, 7. . (2) A dedicated electric motor for driving the hair clipper type cutter 8 is mounted. (3) Use a four-wheel steering system. (4) It is a four-wheel traveling type and the steering wheels are not driven. (5) Use a three-wheel drive system and use only one wheel for steering. (6) The steering wheel 2 may be operated by an electromagnetic solenoid, and an electric motor for steering and an electromagnetic solenoid are collectively referred to as an electric actuator 7 for steering. (7) As a reduction mechanism for driving wheels, a multi-stage gear reduction,
Worm deceleration, planetary deceleration, or a combination of these may be used. (8) It is possible to embed a guide wire in the grass and run the machine body along the guide wire.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1] Overall schematic side view

FIG. 2 is an overall schematic plan view

[Explanation of symbols]

 1 Wheel 2 Wheel 3 Electric Motor 7 Electric Actuator 8 Cutter 12 Solar Battery

Claims (1)

[Claims] 1. A solar cell (11), an electric motor (3) which is operated by the electric power obtained by the solar cell (11), a motor (1) and the wheels (1, 2) and a clipper type cutter at an ultra-low speed by ultra-decelerating the motor output. An unmanned lawn mower comprising a reduction mechanism (4) for driving (8), an electric actuator (7) for steering, and control means for automatically controlling the electric actuator (7).