Electric power work device

Patent metadata

Field	Value
Publication number	US-12083612-B2
Application number	US-202016828670-A
Country	US
Kind code	B2
Filing date	Mar 24, 2020
Priority date	Mar 26, 2019
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

Provided is an electric power work device, which is a chain saw, including: a body case; a cutting part protruding forward from the body case; a motor to drive the cutting part, and a battery. A top handle is provided at an upside with respect to the body case, and, a side handle is provided at a left side surface of the body case. The battery is detachably mounted in a battery part formed behind the top handle. Further, interference reduction part is formed behind the top handle to reduce interference with a palm holding the top handle or a wrist.

First claim

What is claimed is:

1. An electric power work device comprising:
a body case;
a work tool protruding forward from a front side of the body case;
a motor operably connected to the work tool to drive the work tool; and
a single battery operably connected to the motor to supply electric power to the motor,
wherein
a battery part is formed behind a top handle and has a holding part in which the single battery is detachably mounted;
the motor is accommodated in the body case,
the top handle is mounted to the body case and is extended in a longitudinal direction at an upside with respect to the body case,
a side handle is mounted at one end to the top handle and at the other end of the battery part, at one of a right side surface and a left side surface of the battery part,
an upper end part of the single battery protrudes above an upper edge part of a rear end part of the top handle when the single battery is mounted in the holding part,
a first interference reduction part, a second interference reduction part, and a third interference reduction part are formed behind the top handle in a longitudinal direction of the electric power work device to reduce interference with a palm or wrist holding the top handle when an operator extends an arm rearward,
the first interference reduction part is formed by an upper end part of the holding part of the battery part and configured such that the upper end part of the holding part of the battery part, facing a front surface of the single battery, is positioned lower than an upper end part of the top handle, at a corner between a front surface of the battery part and the other of the right side surface and the left side surface of the battery part where the side handle is mounted,
the second interference reduction part is formed by the single battery having a recess and an inclined surface at a corner between the front surface of the single battery and the other of the right side surface and the left side surface of the battery part where the side handle is mounted,
an axis (P) of the third interference reduction part running through a center in the lateral direction of the battery part is positioned at a side, closer to the one of the right side surface and the left side surface of the battery part where the side handle is mounted, with respect to an axis (L) in the longitudinal direction running through a center in the lateral direction of a gripping part of the top handle,
the holding part comprising an attachment/detachment mechanism of parallel arms coupled to one another by a transverse edge of the holding part, the attachment/detachment mechanism securing the battery to the battery part.

2. The electric power work device as claimed in claim 1 , wherein the battery part is inclined such that an upper part thereof is positioned posterior to a lower part thereof.

3. The electric power work device as claimed in claim 1 , wherein an upper end part of the single battery is positioned above an upper end edge of a rear end part of the top handle.

Assignees

• Yamabiko Corp

Inventors

• Osawa Hisato
• Nakano Kenji
• Takeuchi Noriyuki

Classifications

• B25F5/02

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

• B27B17/0008

  Means for carrying the chain saw, e.g. handles (B27B17/0033 takes precedence) · CPC title

• B27B17/08

  Drives or gearings; Devices for swivelling or tilting the chain saw · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• B23D57/023 Primary

  hand-held or hand-operated · CPC title