Mower with cutting protection mechanism

Patent metadata

Field	Value
Publication number	US-12471525-B2
Application number	US-202217578228-A
Country	US
Kind code	B2
Filing date	Jan 18, 2022
Priority date	Oct 13, 2015
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A mower comprises a cutting mechanism, configured to execute a cutting operation; a machine body, wherein the machine body is connected with a side part protection which is located in the side of the cutting mechanism to establish a protection barrier in the side of the cutting mechanism; and a bottom protection, located below the cutting mechanism to establish a protection barrier below the cutting mechanism, wherein the bottom protection is provided with a grass inlet. A human body is prevented from making contact with the cutting mechanism from the side direction of the cutting mechanism, the bottom protection prevents the human body from making contact with the cutting mechanism from the lower side of the cutting mechanism, and the bottom protection is provided with a grass inlet, such that the cutting is smoothly performed.

First claim

What is claimed is:

1 . A mower comprising:
a cutting mechanism; a protection mechanism comprising a side part protection and a bottom protection; a machine body comprising a moving part configured to drive the side part protection and the bottom protection to move together with the cutting mechanism; and a driving mechanism configured to drive the moving part to move, wherein:
the cutting mechanism is configured to be eccentrically arranged below the machine body, deviated to one side of the machine body;
the side part protection is located on a side of the cutting mechanism to establish a first protection barrier on the side of the cutting mechanism;
the bottom protection is located under the cutting mechanism to establish a second protection barrier below the cutting mechanism, and the bottom protection comprises a grass inlet;
positions of the side part protection and the bottom protection on the machine body are deviated to one side of the machine body;
a deviated direction of the side part protection and a deviated direction of the bottom protection is same as a deviated direction of the cutting mechanism; and
the driving mechanism comprises:
a worm gear connected to the moving part;
a worm matched with the worm gear; and

a motor configured to drive the worm to rotate, and when the motor drives the worm to rotate, the worm gear is configured to drive the moving part to rotate around an axis of the worm gear.

2 . A mower comprising:
a cutting mechanism; a protection mechanism comprising a side part protection and a bottom protection; a machine body comprising a moving part configured to drive the side part protection and the bottom protection to move together with the cutting mechanism; a driving mechanism configured to drive the moving part to move; and a control module and a traveling module arranged on the machine body, and the control module is electrically connected to the traveling module to control the traveling module and is electrically connected to the cutting mechanism to control the cutting mechanism to execute a cutting operation, wherein:
the side part protection is located on a side of the cutting mechanism to establish a first protection barrier on the side of the cutting mechanism;
the bottom protection is located under the cutting mechanism to establish a second protection barrier below the cutting mechanism, and the bottom protection comprises a grass inlet;
a height of one or more cutting elements of the cutting mechanism is adjustable, and the side part protection and the bottom protection are configured to ascend and descend by following the one or more cutting elements; and
the driving mechanism comprises:
a worm gear connected to the moving part;
a worm matched with the worm gear; and
a motor configured to drive the worm to rotate, and when the motor drives the worm to rotate, the worm gear is configured to drive the moving part to rotate around an axis of the worm gear.

3 . The mower of claim 1 , wherein the cutting mechanism is movably connected to the machine body, and the side part protection and the bottom protection are configured to move by following the cutting mechanism.

4 . The mower of claim 1 , wherein a height of one or more cutting elements of the cutting mechanism is adjustable, and the side part protection and the bottom protection are ascended or descended by following the one or more cutting elements.

5 . The mower of claim 1 , wherein a length of the bottom protection is greater than or equal to a cutting diameter of the cutting mechanism.

6 . The mower of claim 1 , wherein the bottom protection and the side part protection are connected into a whole.

7 . The mower of claim 1 , wherein the grass inlet is a strip-shaped slit and an angle range between a forming direction of the grass inlet and an advancing direction of the mower is 0-45 degrees.

8 . The mower of claim 1 , wherein a width of the grass inlet in a direction vertical perpendicular to an advancement direction of the mower is less than 13 mm.

9 . The mower of claim 1 , wherein a distance between cutting elements of the cutting mechanism and an outermost side of the machine body is less than 20 mm.

10 . The mower of claim 1 , wherein one side of the bottom protection opposite to a ground is arc-shaped.

11 . The mower of claim 1 , wherein:
two or more cutting mechanisms are arranged; and the two or more cutting mechanisms are deviated to one side of the machine body or are arranged at two sides of the machine body.

12 . The mower of claim 2 , wherein the cutting mechanism is movably connected to the machine body, and the side part protection and the bottom protection are configured to move by following the cutting mechanism.

13 . The mower of claim 2 , wherein a height of one or more cutting elements of the cutting mechanism is adjustable, and the side part protection and the bottom protection are ascended or descended by following the one or more cutting elements.

14 . The mower of claim 2 , wherein a length of the bottom protection is greater than or equal to a cutting diameter of the cutting mechanism.

15 . The mower of claim 2 , wherein the bottom protection and the side part protection are connected into a whole.

16 . The mower of claim 2 , wherein the grass inlet is a strip-shaped slit and an angle range between a forming direction of the grass inlet and an advancing direction of the mower is 0-45 degrees.

17 . The mower of claim 2 , wherein a width of the grass inlet in a direction perpendicular to an advancement direction of the mower is less than 13 mm.

18 . The mower of claim 2 , wherein a distance between cutting elements of the cutting mechanism and an outermost side of the machine body is less than 20 mm.

19 . The mower of claim 2 , wherein one side of the bottom protection opposite to a ground is arc-shaped.

20 . The mower of claim 2 , wherein:
two or more cutting mechanisms are arranged; and the two or more cutting mechanisms are deviated to one side of the machine body or are arranged at two sides of the machine body.

Assignees

• Positec Power Tools Suzhou Co Ltd

Inventors

• Ran Yuanzhong
• Du Jiang
• Sun Yunhong
• Zha Xiahong
• Zhao Fengli

Classifications

• A01D34/84 Primary

  for edges of lawns or fields, e.g. for mowing close to trees or walls ({for embankments A01D34/86 takes precedence;} edge trimmers A01G3/00) · CPC title

• A01D34/828

  Safety devices · CPC title

• A01D34/008

  for automated or remotely controlled operation · CPC title

• A01D34/63

  having cutters rotating about a vertical axis · CPC title

• A01D34/81

  Casings; Housings (A01D34/71 takes precedence) · CPC title