Electric working machine and electric working machine system

Patent metadata

Field	Value
Publication number	US-9876201-B2
Application number	US-201313970845-A
Country	US
Kind code	B2
Filing date	Aug 20, 2013
Priority date	Aug 20, 2012
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

An electric working machine including: a housing to which a battery is configured to be detachably mounted, wherein the housing is configured such that a weight unit including a weight can be mounted to the housing.

First claim

What is claimed is:

1. A bush cutter machine comprising:
a battery;
a housing including a portion to which the battery is configured to be detachably mounted;
an adapter configured to be detachably mounted to the portion when the battery is not mounted to the portion, the adapter being configured to receive electric power from an external power source, having a box-shape with a space therein, and being lightweight as compared to the battery;
a weight unit including a weight which is accommodated in the space inside the adapter, the weight unit being configured to be detachably mounted to the housing independently of the battery by detachably mounting the adapter to the portion;
a handle;
an operation rod to which the handle portion is provided;
a cutting blade unit provided at a front end of the operation rod; and
a motor that drives an operation tool,
wherein, in a longitudinal direction of the electric working machine, the weight unit is provided on an opposite side of the motor with the handle located therebetween, and
wherein the housing is provided at a rear end of the operation rod.

2. The bush cutter according to claim 1 , wherein the weight is configured to be variable in weight.

3. The bush cutter according to claim 1 , wherein the housing includes a hole portion in which a weight is configured to be disposed.

4. The bush cutter according to claim 3 , wherein the weight unit includes a cover portion configured to cover an opening of the hole portion.

5. The bush cutter according to claim 4 , wherein the opening of the hole portion includes a stepped portion to which the cover portion is configured to engage.

6. The bush cutter according to claim 4 , wherein the hole portion is a through-hole, and
wherein the cover portion is configured to be provided to both openings of the hole portion.

7. The bush cutter according to claim 6 , wherein the weight unit further includes a shaft portion extending into the hole portion from at least one of the cover portions, and
wherein the weight includes a plurality of plates each including a through-hole through which the shaft portion passes and both cover portions are detachably fixed to each other via the shaft portion.

8. The bush cutter according to claim 7 ,
wherein the weight unit further includes an elastic body having a through-hole through which the shaft portion passes, and
wherein the plates are restricted from sliding in an axial direction of the plates when the elastic body is arranged side by side to the plates.

9. The bush cutter according to claim 4 ,
wherein the weight unit further includes a shaft portion extending into the hole portion from the cover portion, and
wherein the weight includes a plurality of plates each including a through-hole through which the shaft portion passes.

10. The bush cutter according to claim 1 , wherein the external power source is a backpack type battery.

Assignees

• Hitachi Koki Kk

Inventors

• Ishikawa Megumi
• Kosugi Shingo
• Tomita Hirohisa

Classifications

• H01M6/5027 Primary

  Dummy cells · CPC title

• H01M50/247

  specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers · CPC title

• H01M2/1022 Primary

  Electricity · mapped topic

• H01M2/1033

  Electricity · mapped topic

• A01D34/902

  Ergonomic provisions · CPC title