Electric weeder

Patent metadata

Field	Value
Publication number	US-2024284812-A1
Application number	US-202318457714-A
Country	US
Kind code	A1
Filing date	Aug 29, 2023
Priority date	Feb 27, 2023
Publication date	Aug 29, 2024
Grant date	—

Abstract

An electric weeder includes a body and a working head. The body includes a drive mechanism. The drive mechanism includes a motor for driving the working head to rotate around a first axis. The drive mechanism has a first working mode in which the working head is screwed into a workplane and a second working mode in which the working head is unscrewed from the workplane. The direction of rotation of the working head in the first working mode is different from the direction of rotation of the working head in the second working mode. The output rotational speed of the working head is less than or equal to 400 RPM in the first working mode.

First claim

What is claimed is:

1 . An electric weeder, comprising:
a body comprising a housing for connecting a power supply and a drive mechanism at least partly accommodated in the housing; and a working head driven by the body and movably connected to the body, wherein the drive mechanism comprises a motor for driving the working head to rotate around a first axis, the drive mechanism has a first working mode in which the drive mechanism drives the working head to screw into a workplane and a second working mode in which the drive mechanism drives the working head to screw out of the workplane, a direction of rotation of the working head when the drive mechanism is in the first working mode is different from a direction of rotation of the working head when the drive mechanism is in the second working mode, and an output rotational speed of the working head is less than or equal to 400 RPM in the first working mode.

2 . The electric weeder of claim 1 , wherein a maximum output rotational speed of the working head in the second working mode is greater than or equal to a maximum output rotational speed of the working head in the first working mode.

3 . The electric weeder of claim 1 , wherein the drive mechanism further comprises a transmission assembly for transmitting power outputted by the motor to the working head.

4 . The electric weeder of claim 3 , wherein the transmission assembly provides at least one deceleration ratio.

5 . The electric weeder of claim 3 , wherein the transmission assembly comprises a planet gear deceleration assembly.

6 . The electric weeder of claim 1 , wherein the power supply comprises a battery pack for supplying power to the motor.

7 . The electric weeder of claim 6 , wherein the battery pack is detachably connected to the housing, and the battery pack is configured to adapt to another power tool and supplies power to another power tool when the battery pack is detached from the body.

8 . The electric weeder of claim 6 , wherein a nominal voltage of the battery pack is greater than or equal to 4 V and less than or equal to 80 V.

9 . The electric weeder of claim 1 , wherein the working head comprises:
a weeder head located at an end of the working head and used for being screwed into the workplane and winding grass; a connection assembly extending along the first axis and connecting the weeder head to the body; and a grass unloading assembly driven to clean the weeder head.

10 . The electric weeder of claim 9 , wherein, along a direction of the first axis, a distance L between a lower end of the weeder head and an upper end of the body is greater than or equal to 700 mm and less than or equal to 1300 mm.

11 . The electric weeder of claim 1 , wherein the body further comprises a switching portion configured to set a working mode of the drive mechanism to the first working mode or the second working mode.

12 . The electric weeder of claim 11 , wherein the switching portion is at least partially disposed on the housing.

13 . The electric weeder of claim 1 , further comprising a grip mechanism formed on or connected to the housing, wherein the grip mechanism comprises a first handle and a second handle, the first handle and the second handle are separately disposed on two sides of the first axis, an included angle α between an orthographic projection of an axis of the first handle along a length direction on a plane perpendicular to the first axis and an orthographic projection of an axis of the second handle along a length direction on the plane perpendicular to the first axis is greater than 90° and less than 180°.

14 . The electric weeder of claim 13 , wherein the axis of the first handle along the length direction is basically perpendicular to the first axis, and the axis of the second handle along the length direction is basically perpendicular to the first axis.

15 . The electric weeder of claim 13 , wherein the power supply is disposed between the first handle and the second handle.

16 . An electric weeder, comprising:
a body comprising a housing for connecting a power supply and a drive mechanism at least partly accommodated in the housing; and a working head driven by the body and movably connected to the body, wherein the drive mechanism comprises a motor for driving the working head to rotate around a first axis and a transmission assembly for transmitting power outputted by the motor to the working head, the transmission assembly comprises a gear deceleration assembly, and, along a direction of the first axis, a distance L between a lower end of the working head and an upper end of the body is greater than or equal to 700 mm and less than or equal to 1300 mm.

17 . An electric weeder, comprising:
a body comprising a housing for connecting a power supply and a drive mechanism accommodated in the housing; and a working head driven by the body and movably connected to the body, wherein the drive mechanism comprises a motor for driving the working head to rotate around a first axis and a transmission assembly for transmitting power outputted by the motor to the working head, the transmission assembly comprises a gear deceleration assembly, the drive mechanism has a first working mode in which the drive mechanism drives the working head to screw into a workplane, and an output rotational speed of the working head is less than or equal to 400 RPM in the first working mode.

18 . The electric weeder of claim 17 , wherein the drive mechanism has a second working mode in which the drive mechanism drives the working head to screw out of the workplane, and a direction of rotation of the working head when the drive mechanism is in the first working mode is different from a direction of rotation of the working head when the drive mechanism is in the second working mode.

19 . The electric weeder of claim 17 , wherein the power supply comprises a battery pack for supplying power to the motor.

20 . The electric weeder of claim 19 , wherein the battery pack is detachably connected to an outer sidewall of the housing.

Assignees

• Nanjing Chervon Ind Co Ltd

Inventors

• Wu Xu
• Cheng Yonghui
• Tong Shubin

Classifications

• A01B1/065

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• A01B1/16 Primary

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