Electric power work device

Patent metadata

Field	Value
Publication number	US-11826893-B2
Application number	US-202016897122-A
Country	US
Kind code	B2
Filing date	Jun 9, 2020
Priority date	Jun 20, 2019
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

An electric power work device simplifies a mechanism of a battery attachment part and easily removes a battery from the battery attachment part. A chain saw includes a body case, a cutting part (a work tool), and the battery. A battery removal mechanism for removing the battery is provided on a rear part of the body case. The battery removal mechanism includes a lower end of the battery and a bottom surface of the body case. The lower end of the battery protrudes downward from the bottom surface of the body case, and a frontmost end of a lower part of the battery is disposed in front of a rear end of a lower part of a top handle. Another battery removal mechanism includes a protrusion on the bottom surface of the body case and in front of the lower end of the battery.

First claim

What is claimed is:

1. An electric power work device comprising:
a body case;
a work tool protruding forward from a front part of the body case;
a motor configured to drive the work tool; a battery configured to supply electric power to the motor; and
a battery removal mechanism,
wherein the body case receives the motor,
wherein the body case comprises:
a body part;
a top handle provided above the body part and extending in a longitudinal direction; and
a battery attachment part to which the battery is vertically detachably attached, the battery attachment part being disposed behind the body part in the longitudinal direction,

wherein the battery removal mechanism comprises:
a lower end of the battery;
a bottom surface of the body part of the body case, and
a protrusion formed on the bottom surface of the body part of the body case,

wherein the protrusion is disposed in front of the lower end of the battery in the longitudinal direction and at a rear part of the body part which is located at the rear of a center of the body part in the longitudinal direction,
wherein the battery removal mechanism is configured to remove the battery upward from the battery attachment part by pushing down a rear end of the top handle,
wherein while the battery is attached to the battery attachment part, the lower end of the battery protrudes downward from a rear portion of the bottom surface of the body part of the body case, and a frontmost end of the battery is disposed in front of the rear end of the top handle,
wherein while the electric power work device is placed on a floor, a contact point between the floor and the battery is disposed in front of the rear end of the top handle in the longitudinal direction,
wherein the lower end of the battery includes an inclined and chamfered surface facing the floor, which is configured to allow the contact point to shift as the rear end of the top handle is pushed down.

2. The electric power work device according to claim 1 ,
wherein a rear end of the top handle is joined to an upper end of the battery attachment part,
wherein the battery attachment part inclines such that a lower part of the battery attachment part is disposed in front of an upper part of the battery attachment part.

3. The electric power work device according to claim 1 ,
wherein the body case has a side surface on which a side handle is attached,
wherein the side handle is disposed at the side of the top handle and extends from the front part toward the rear part of the body part of the body case.

4. The electric power work device according to claim 1 ,
wherein the inclined surface extends downward as the inclined surface extends from a rear part to a front part of the battery.

5. The electric power work device according to claim 1 ,
wherein an upper end of the battery is disposed above a lower peripheral end of a rear end of the top handle.

6. An electric power work device comprising:
a body case;
a work tool protruding forward from a front part of the body case;
a motor configured to drive the work tool;
a battery configured to supply electric power to the motor; and
a battery removal mechanism,
wherein the body case receives the motor,
wherein the body case comprises:
a body part;
a top handle provided above the body part and extending in a longitudinal direction; and
a battery attachement part to which the battery is vertically detachably attached,

wherein the battery removal mechanism commprises:
a lower end of the battery;
a bottom surface of the body part of the body case; and
a protrusion formed on the bottom surface of the body part of the body case,

wherein the body case is configured to rotate about the protrusion as a fulcrum in contact with a floor, between:
a first position in which a front part of the bottom surface and the lower end of the battery also contact the floor, and
a second position in which the lower end of the battery also contacts the floor but the front part of the bottom surface is separated from the floor,

wherein the battery removal mechanism is configured to remove the battery upward from the battery attachment part by pushing down a rear end of the top handle,
wherein while the battery is attached to the battery attachment part, the lower end of the battery protrudes downward from a rear portion of the bottom surface of the body part of the body case, and
wherein the protrusion is disposed in front of the lower end of the battery in the longitudinal directin and at a rear part of the body part which is located at the rear of a center of the body part in the longitudinal direction.

7. The electric power work device according to claim 2 ,
wherein a rear end of the top handle is joined to an upper end of the battery attachment part,
wherein the battery attachment part inclines such that a lower part of the battery attachment part is disposed in front of an upper part of the battery attachment part.

8. The electric power work device according to claim 2 ,
wherein the body case has a side surface on which a side handle is attached,
wherein the side handle is disposed at the side of the top handle and extends from the front part toward the rear part of the body part of the body case.

9. The electric power work device according to claim 2 ,
wherein the battery has a lower surface having an inclined surface which extends downward as the inclined surface extends from a rear part to a front part of the battery.

10. The electric power work device according to claim 2 ,
wherein an upper end of the battery is disposed above a lower peripheral end of a rear end of the top handle.

Assignees

• Yamabiko Corp

Inventors

• Osawa Hisato
• Maeno Takeshi
• Nakano Kenji

Classifications

• B25F5/023 Primary

  with removably attached levels · CPC title

• B27B17/0008

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

• H01M50/213

  adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) · CPC title

• B25F5/02 Primary

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

• B27B17/00

  Chain saws; Equipment therefor {(slotting or mortising machines equipped with chain cutters B27F5/06)} · CPC title