US 2024/0199115 A1Published application

Garden Tool And Method For Control Garden Tool

AssigneeGreenworks (Jiangsu) Co., Ltd.

InventorsChaoqun WANG, Qunli WEI, Wenwei XU, Jun FAN, Peng ZHAO, Jiafu XUE

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Abstract

A garden tool and control method thereof is provided. The garden tool includes a steering wheel; a first angle sensor, to which the steering wheel is connected through transmission via a deceleration transmission mechanism; and a control module, to which the first angle sensor is electrically connected, the control module being respectively electrically connected to driving elements of the two driving wheels. The present disclosure utilizes at least one angle sensor in the vehicle control system to generate an actual position signal indicating the position status of the steering wheel, rather than an inferred or expected position of the steering wheel, thus effectively improving response speed and response accuracy.

Claims20

Dependent claims

A garden tool, comprising:

a chassis, which is installed with a universal wheel and at least two driving wheels, one of the universal wheel and the driving wheel being located at a front portion of the chassis and the other at a rear portion of the chassis;
a steering wheel, which is rotatably connected to the chassis;
a first angle sensor, to which the steering wheel is connected through transmission via a deceleration transmission mechanism;
and
a control module, to which the first angle sensor is electrically connected, and the control module being respectively electrically connected to driving elements of the two driving wheels, wherein
the control module is configured to:
control the two driving wheels to rotate at equal speeds when a rotational angle of the first angle sensor is within a first preset interval,
control the two driving wheels to rotate at different speeds in a same direction when the rotational angle of the first angle sensor is within a second preset interval, and
control the two driving wheels to rotate in reverse directions when the rotational angle of the first angle sensor is within a third preset interval,
wherein, the second preset interval is distributed at two ends of the first preset interval, and the third preset interval is distributed at two ends of a union of the first preset interval and the second preset interval.

7 more elements

A method for control a garden tool, wherein, the garden tool comprises a first angle sensor configured to identify a rotation of a steering wheel, the first angle sensor being electrically connected to a control module, the control module being respectively electrically connected to a left driving wheel and a right driving wheel, the method comprises:

obtaining a detection signal of the first angle sensor;
and
controlling rotational speeds of the left driving wheel and the right driving wheel according to the detection signal, comprising:
controlling the left driving wheel and the right driving wheel to rotate at equal speeds when a left or right rotational angle of the steering wheel is less than or equal to a first preset value;
controlling the rotational speed of the left driving wheel to be lower than that of the right driving wheel when the steering wheel is turning to the left and the rotational angle is larger than the first preset value and less than or equal to a second preset value;
controlling the left driving wheel to rotate backwards when the steering wheel is turning to the left and the rotational angle is larger than the second preset value;
controlling the rotational speed of the right driving wheel to be lower than that of the left driving wheel when the steering wheel is turning to the right and the rotational angle is larger than the first preset value and less than or equal to the second preset value;
and
controlling the right driving wheel to rotate backwards when the steering wheel is turning to the right and the rotational angle is larger than the second preset value.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/534,694Filed 10 Dec 2023
Priority: CN 202211641704.820 Dec 2022
Published: 20 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

B62D 6/001
Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits: the torque NOT…
B62D 11/003
Control systems: electric or electronic control systems
A01D 34/006
Mowers ; Mowing apparatus of harvesters: control or measuring arrangements
A01D 34/824
Other details: handle arrangements

Family

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