Power tool, lawn mower, and control method thereof
AssigneeNanjing Chervon Industry Co., Ltd.
InventorsHaishen Xu, Zhao Hu, Yangzi Liu, Toshinari Yamaoka
Life of this patent
Estimating the term…
Abstract
A lawn mower includes a blade configured to cut grass, a chassis, configured to accommodate the blade, and front and rear wheels connected to the chassis. A motor is configured to drive at least the rear wheel to rotate. A detection apparatus detects the rotational speed of the front wheel and a controller controls the motor. Accordingly, the speed of a front wheel is detected to control a moving speed of the lawn mower, thereby enhancing the performance of the lawn mower and improving the user's experience.
Claims9
A self-propelled lawn mower, comprising:
- a blade configured to cut grass;
- a chassis configured to accommodate the blade;
- a front wheel connected to a front side of the chassis;
- a rear wheel connected to a rear side of the chassis;
- a motor at least configured to drive the rear wheel to rotate;
- a detection apparatus configured to detect a rotational speed of the front wheel;
- and
- a controller configured to control the motor to decelerate when the rotational speed of the front wheel decreases, wherein
- the motor is operably connected to the rear wheel, and the detection apparatus is electrically connected to the controller.
A self-propelled power tool, comprising:
- a handle configured to operate the power tool;
- a chassis is connected to the handle;
- a front wheel operably connected to a front side of the chassis;
- a rear wheel operably connected to a rear side of the chassis;
- a motor at least configured to drive the rear wheel to rotate;
- a detection apparatus configured to detect a rotational speed of the front wheel;
- a controller configured to adjust, according to the detected rotational speed of the front wheel, a current for driving the motor, and
- a fixed assembly configured to roll along with the front wheel, wherein
- the detection apparatus comprises a sensor configured to generate a signal when the fixed assembly passes across a predetermined position.
A method for controlling a self-propelled lawn mower, the lawn mower comprising:
- a front wheel operably connected to a front side of a chassis;
- a rear wheel operably connected to a rear side of the chassis;
- and
- a motor at least configured to drive the rear wheel to rotate;
- and
- the method comprising:
- detecting a rotational speed of the front wheel;
- determining whether the detected rotational speed of the front wheel is less than a predetermined value;
- and
- when the rotational speed of the front wheel is less than the predetermined value, reducing a drive current of the motor.
Dependencies are inferred from the claim text.