Handle and power tool comprising same handle

Patent metadata

Field	Value
Publication number	US-9950416-B2
Application number	US-201414784797-A
Country	US
Kind code	B2
Filing date	Apr 16, 2014
Priority date	Apr 17, 2013
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

To provide a handle that is effective at achieving both vibration resistance and usability. A handle attached to a tool body of a power tool has: a grip portion; a connecting portion that connects to the tool body; elastic element interposing regions that are formed between the grip portion and the connecting portion; elastic elements disposed in the elastic element interposing regions; a powder filling region formed between the grip portion and connecting portion; and a plurality of powder bodies that fill the powder filling region.

First claim

The invention claimed is:

1. A power tool comprising:
an operation rod as a tool body;
a handle that is connected to an operation rod;
a cutting unit that is disposed on one end of the operation rod and rotatably supports a cutting blade; and
a driving unit that is disposed on the other end of the operation rod and drives the cutting blade;
wherein the handle includes:
a grip,
a cylindrical member integrally connected to the grip and coaxially disposed on the outside of the operation rod,
a support part provided on the operation rod,
an elastic element interposing region,
an elastic element disposed in the elastic element interposing region,
a powder filling region, and
powders filled in the powder filling region,

wherein the handle, the elastic element and the powder filling region are formed in a plane orthogonal to a longitudinal direction of the operation rod, and
wherein the elastic element interposing region is formed between the cylindrical member and the support part, and the powder filling region is formed in the elastic element.

2. The power tool as defined in claim 1 , wherein the elastic element interposing region and the powder filling region are formed side by side in a direction from a region of a connection part which is connected to the tool body toward the grip.

3. The power tool as defined in claim 1 , wherein the elastic element and the powders are arranged to reduce vibration which is caused in the tool body in a first direction and a second direction different from the first direction and transmitted from a connection part to the grip.

4. The power tool as defined in claim 3 , wherein the first direction corresponds to a direction in which the operation rod extends, and the elastic element is arranged to compressively deform in the first direction.

5. The power tool as defined in claim 3 , wherein:
the elastic element interposing region is formed between the operation rod and the connection part.

6. The power tool as defined in claim 5 , wherein:
a plurality of such elastic elements are arranged in a circumferential direction around a center line of the operation rod, and
the powders are filled inside the elastic elements.

Assignees

• Makita Corp

Inventors

• Kutsuna Tomoyuki
• Sunazuka Ryo
• Machida Yoshitaka
• Ito Masahiro

Classifications

• B25D2222/57

  Elastomers, e.g. rubber · CPC title

• B25F5/026

  in the form of an auxiliary handle (B25F5/024 takes precedence) · CPC title

• B25F5/006

  Vibration damping means · CPC title

• B25D17/043 Primary

  Handles resiliently mounted relative to the hammer housing (B25D17/046 takes precedence) · CPC title

• B25F5/02

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title