Work machine

Patent metadata

Field	Value
Publication number	US-12162129-B2
Application number	US-202117924666-A
Country	US
Kind code	B2
Filing date	May 7, 2021
Priority date	May 14, 2020
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

A cutting tool 10 comprises a housing 30 , and a handle 50 connected to the housing 30 . The handle 50 comprises: a grip part 51 ; a first connection part 52 extending from one end of the grip part 51 toward a front side and fixed to a main body housing 32 of the housing 30 ; and a second connection part 53 extending from the other end of the grip part 51 toward the front side and fixed to the main body housing 32 . Thus, a loop structure S is formed by the housing 30 and the handle 50 . Then, a battery pack 100 to be attached to a battery attachment and detachment part 42 of a motor housing 40 is disposed in the loop structure S.

First claim

What is claimed is:

1. A work machine, comprising:
a motor, comprising a rotation shaft that rotates around an axis extending in a left-right direction;
an output shaft, that is driven by the motor;
a main body housing, accommodating at least a part of the output shaft;
a motor housing, accommodating the motor, the motor housing being fixed to the main body housing;
a handle, connected to the main body housing; and
a battery attachment and detachment part, provided at the motor housing, wherein a battery supplying power to the motor is detachably installed to the battery attachment and detachment part,
wherein the handle comprises:
a grip part, grippable by an operator;
a first connection part, extending from an end of the grip part toward a side of the housing and connected to the housing;
a second connection part, extending from an other end of the grip part toward the side of the housing and connected to the housing,
wherein at least a part of the first connection part is located above the battery, and at least a part of the second connection part is located below the battery so as to be overlapped to the battery in an upper-lower direction,
wherein the motor housing comprises:
a motor accommodation part that accommodates the motor;
a fixing part, disposed at one side end of the motor housing in the left-right direction, the fixing part fixing the motor accommodation part to the main body housing,
wherein a battery holding part is connected to the main body housing via the fixing part, and the handle is connected to the main body housing without the fixing part.

2. The work machine as claimed in claim 1 ,
wherein the output shaft extends in the left-right direction,
wherein a loop structure is formed by the handle and the housing, and the battery installed to the battery attachment and detachment part is disposed inside the loop structure such that a long side intersects a front-rear direction.

3. The work machine as claimed in claim 1 , wherein the handle has a protect part, the protect part connects the first connection part and the second connection part in the upper-lower direction, and is disposed between the battery installed to the battery attachment and detachment part and the grip part.

4. The work machine as claimed in claim 3 , wherein a controller controlling the motor is accommodated inside the protect part.

5. The work machine as claimed in claim 1 , comprising a tip tool connected to the motor and rotated by the motor,
wherein the tip tool is formed in a circular plate shape with an axial direction of the motor as a plate thickness direction,
the grip part, the first connection part, and the second connection part, when viewed in a plan view, extend along a direction orthogonal to the axial direction of the motor.

6. The work machine as claimed in claim 1 , wherein a direction orthogonal to an upper-lower direction is set as a first direction, and a direction orthogonal to the first direction and the upper-lower direction is set as a second direction,
the motor is configured with the first direction as an axial direction,
when viewed in the first direction, the motor, the battery attachment and detachment part, and the grip part are disposed in order along a first inclination direction inclined upward toward a side of the second direction, and
a base slidable on a processing material is disposed on a lower side of the motor and the handle.

7. The work machine as claimed in claim 6 , wherein the motor housing, when viewed in the first direction, is formed by split housing parts split in a second inclination direction orthogonal to the first inclination direction, and
a pair of housing side rail parts forming a portion of the battery attachment and detachment part and locked with the battery are provided in the split housing parts.

8. The work machine as claimed in claim 1 , wherein the battery attachment and detachment part has two battery support parts,
one of the battery support parts located on an upper side is closer to a center position of the motor in a front-rear direction than an other of the battery support parts located on a lower side.

9. The work machine as claimed in claim 8 , wherein the battery support part is a rail part extending in a left-right direction.

10. The work machine as claimed in claim 9 , wherein the battery attachment and detachment part supports the battery so that a lower end of the battery is located above a lower end of the motor housing.

11. The work machine as claimed in claim 1 , wherein the battery is configured to be detachably attachable to the battery attachment and detachment part by sliding at a rear of the motor housing in an intersecting direction which is a direction that intersects the front-rear direction.

12. The work machine as claimed in claim 11 , wherein intersecting direction is the left-right direction.

13. The work machine as claimed in claim 1 , wherein the handle covers a portion of a side surface of the battery that faces the left-right direction.

14. The work machine as claimed in claim 1 , wherein a center position of the battery in the left-right direction of the side surface portion is offset in the left-right direction with respect to the center position of the grip part in the left-right direction.

15. The work machine as claimed in claim 1 , wherein the battery attachment and detachment part includes a pair of rails that supports the battery, and
in plan view, the pair of rails is hidden from view by the handle.

16. The work machine as claimed in claim 1 , wherein a part of the handle is located forward of an axial center of the rotation shaft.

17. The work machine as claimed in claim 1 , wherein the first connection part and the second connection part are connected the main body housing so as to sandwich the motor housing in the upper-lower direction.

18. A work machine, comprising:
a motor housing, accommodating a motor;
a circular saw blade, rotated by the motor around an axis extending in a left-right direction;
a base, located below the motor housing, and having an insertion hole allowing at least a portion of the circular saw blade to protrude downward;
a handle, connected to the motor housing; and
a battery attachment and detachment part, provided at the motor housing, wherein a substantially rectangular parallelepiped shape battery supplying power to the motor is detachably installed to the battery attachment and detachment part,
wherein the battery attachment and detachment part is provided with a connector that is electrically connected with the battery,
wherein the battery includes a side surface part having a connector part that is electrically connected with the connector,
wherein the battery attachment and detachment part is disposed on a side surface part at a rear side of the motor housing, and the battery attachment and detachment part is configured to support the battery such that the side surface part of the battery faces a lower front direction.

19. The work machine as claimed in claim 18 , wherein the battery attachment and detachment part has two battery support parts,
one of the battery support parts located on an upper side is closer to a center position of the motor in a front-rear direction than an other of the battery support parts located on a lower side.

20. The work machine as claimed in claim 19 , wherein the battery support part is a rail part extending in a left-right direction.

21. The work machine as claimed in claim 20 , wherein t

Assignees

• Koki Holdings Co Ltd

Inventors

• ISE Naoto
• Matsunaga Kenichi
• Maeda Keisuke
• IMAYOSHI Masahide

Classifications

• B23D47/12

  of drives for circular saw blades · CPC title

• B27B9/00

  Portable power-driven circular saws for manual operation (details or components, e.g. handles, casings, of portable power-driven tools not particularly related to the operation performed B25F5/00) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• B25F5/02 Primary

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