Grounding body and grass cutter comprising grounding body

Patent metadata

Field	Value
Publication number	US-12302786-B2
Application number	US-202217851466-A
Country	US
Kind code	B2
Filing date	Jun 28, 2022
Priority date	Jun 29, 2021
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A grounding body may be mounted on a cutting blade shaft of a grass cutter. The grounding body may include a mounting part for mounting the grounding body on the cutting blade shaft, wherein a cutting blade is mounted on the cutting blade shaft to be positioned above the grounding body; and a main body coupled to the mounting part and configured to contact a ground. The main body may include a first main body constituted of a first resin; and a second main body constituted of a second resin different from the first resin.

First claim

What is claimed is:

1. A grounding body mounted on a cutting blade shaft of a grass cutter, the grounding body comprising:
a mounting part for mounting the grounding body on the cutting blade shaft, wherein a cutting blade is mounted on the cutting blade shaft to be positioned above the grounding body; and
a main body coupled to the mounting part and configured to contact a ground, wherein the main body comprises:
a first main body constituted of a first resin; and
a second main body constituted of a second resin different from the first resin, wherein
the grounding body is mounted on the cutting blade shaft by a nut member,
the mounting part comprises a through hole through which the cutting blade shaft passes,
a color of the first resin is different from a color of the second resin,
a lower end of the second main body is positioned below a lower end of the cutting blade shaft and a lower end of the nut member, and
a lower end of the first main body is positioned below the lower end of the second main body.

2. The grounding body according to claim 1 , wherein
an outer surface of the first main body is configured to contact the ground, and
the second main body is disposed on an inner surface of the first main body.

3. The grounding body according to claim 2 , wherein
a recess is defined in the inner surface of the first main body,
a lower end of the recess is positioned below the lower end of the cutting blade shaft and the lower end of the nut member, and
the second main body is disposed in the recess.

4. The grounding body according to claim 1 , wherein
the second main body is disposed on an upper surface of the first main body.

5. The grounding body according to claim 1 , wherein
the main body further comprises a third main body constituted of a third resin different from the first resin and the second resin,
the third resin is more elastically deformable than the first resin and the second resin, and
the third main body abuts a lower surface of the cutting blade.

6. The grounding body according to claim 5 , wherein
the first main body comprises:
a cylindrical portion coupled to the mounting part; and
a flange portion extending radially outward from a lower end of the cylindrical portion, and

the third main body is disposed on an upper surface of the flange portion.

7. The grounding body according to claim 6 , wherein
the third main body is configured separately from the first main body and the second main body,
a recess having a downwardly recessed shape is defined in an upper surface of the flange portion,
the third main body is disposed in the recess, and
an upper end of the third main body is positioned above an upper end of the flange portion.

8. The grounding body according to claim 1 , wherein
the second resin is more elastically deformable than the first resin, and
the second main body abuts a lower surface of the cutting blade.

9. The grounding body according to claim 8 , wherein
the first main body comprises:
a cylindrical portion coupled to the mounting part; and
a flange portion extending radially outward from a lower end of the cylindrical portion, and

the second main body is disposed on an upper surface of the flange portion.

10. The grounding body according to claim 9 , wherein
the second main body is disposed on an inner surface of the flange portion.

11. A grass cutter comprising:
an operation rod;
a cutting blade shaft disposed on a front portion of the operation rod;
a cutting blade mounted on the cutting blade shaft; and
a grounding body mounted on the cutting blade shaft and configured to contact a ground, wherein the cutting blade is positioned above the grounding body,
wherein
the grounding body comprises:
a mounting part for mounting the grounding body on the cutting blade shaft; and
a main body coupled to the mounting part and configured to contact the ground,

the main body comprises:
a first main body constituted of a first resin; and
a second main body constituted of a second resin different from the first resin, wherein

the grounding body is mounted on the cutting blade shaft by a nut member,
the mounting part comprises a through hole through which the cutting blade shaft passes,
a color of the first resin is different from a color of the second resin,
a lower end of the second main body is positioned below a lower end of the cutting blade shaft and a lower end of the nut member, and
a lower end of the first main body is positioned below the lower end of the second main body.

Assignees

• Makita Corp

Inventors

• Kutsuna Tomoyuki
• Fujimatsu Naoki
• Iwamoto Nozomu

Classifications

• A01D34/67 Primary

  hand-guided by a walking operator · CPC title

• A01D34/733

  Cutting-blade mounting means · CPC title

• A01D34/81 Primary

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

• A01D34/82

  Other details · CPC title

• A01D34/68 Primary

  with motor driven cutters or wheels · CPC title