Garden tool

Patent metadata

Field	Value
Publication number	US-11957073-B2
Application number	US-202017090860-A
Country	US
Kind code	B2
Filing date	Nov 5, 2020
Priority date	Nov 11, 2019
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

The invention provides a garden tool, which comprises a traveling assembly, a travel-driven assembly and a control assembly. The traveling assembly comprises front wheel and rear wheel. The travel-driven assembly comprises a front-drive mechanism for driving the front wheel and a rear-drive mechanism for driving the rear wheels. The control assembly controls the work of the front-drive mechanism and the rear-drive mechanism, so as to enable the front wheel and the rear wheel to respectively move forward or backward. Compared with the prior art, the garden tool drives the front wheels and the rear wheels to move forward or backward respectively through the front-drive mechanism and the rear-drive mechanism, and thus not only the garden tool automatically walks backward, but also the traveling assembly can be ensured to obtain sufficient power, thereby the garden tool is prevented from slipping when climbing and retreating.

First claim

What is claimed is:

1. A garden tool, which comprises:
a traveling assembly including a front wheel and a rear wheel;
a travel-driven assembly including a front-drive mechanism driving the front wheel and a rear-drive mechanism driving the rear wheel; and

a control assembly controlling the front-wheel drive mechanism and the rear-wheel drive mechanism, the front wheel and rear wheel move forward or backward under the action of the front wheel-drive mechanism and the rear-wheel drive mechanism respectively;
wherein the garden tool further comprises a push rod, and the push rod is provided with a speed regulating switch that cooperates with the travel-driven assembly to adjust the rotation speed of the travel-driven assembly,
wherein the speed regulating switch includes a first position, a middle position, and a second position, when the speed regulating switch being between the first position and the middle position, the travel-driven assembly rotates in a forward speed, when the speed regulating switch being in the middle position, the rotation speed of travel-driven assembly is zero, when the speed regulating switch being between a middle position and a second position, the travel-driven assembly rotates in a backward speed.

2. The garden tool according to claim 1 , wherein a maximum backward speed of the travel-driven assembly is not higher than half of a maximum forward speed of the travel-driven assembly.

3. The garden tool according to claim 1 , wherein the garden tool further comprises a pulse width modulation assembly, and the pulse width modulation assembly is set to gradually increase a duty ratio so that the rotation speed of the travel-driven assembly gradually increases to a preset speed.

4. The garden tool according to claim 3 , wherein the garden tool further comprises a speed detection assembly; and when the speed detection assembly detects that the rotation speed of the travel-driven assembly is higher than a preset rotation speed, the speed detection assembly controls the pulse width modulation assembly to gradually reduce the duty ratio, thereby the rotation speed of the travel-driven assembly is gradually reduced to the preset rotation speed.

5. The garden tool according to claim 4 , wherein the pulse width modulation assembly comprises a front pulse width modulator that cooperates with the front-drive mechanism and a rear pulse width modulator that cooperates with the rear-drive mechanism, and the speed detection assembly includes a front speed detector that cooperates with the front-drive mechanism and a rear speed detector that cooperates with the rear-drive mechanism.

6. The garden tool according to claim 1 , wherein the garden tool is further provided with an alarm assembly, and when the control assembly detects that a running current of the travel-driven assembly is higher than a preset threshold value and a preset time of running is maintained, the travel-driven assembly stops working.

7. The garden tool according to claim 1 , wherein when the garden tool gets a signal for moving backward, the travel-driven assembly is configured to starts after a first predetermined time, and the first predetermined time can be set by an operator.

8. The garden tool according to claim 1 , wherein the garden tool further comprising an alarm assembly, when the garden tool is in a backward state, the alarm assembly is configured to alert an operator in a form of sound or light.

Assignees

• Globe Jiangsu Co Ltd

Inventors

• Jiang Feng
• Tao Wen

Classifications

• A01D34/6806 Primary

  Driving mechanisms (for the cutters A01D34/76) · CPC title

• A01D34/69 Primary

  with motor driven wheels · CPC title

• B62D51/04

  the driver walking · CPC title

• A01D2034/6843

  Control levers on the handle of the mower · CPC title

• A01D2101/00

  Lawn-mowers · CPC title