Work machine

Patent metadata

Field	Value
Publication number	US-2021237177-A1
Application number	US-201917263525-A
Country	US
Kind code	A1
Filing date	Sep 20, 2019
Priority date	Sep 28, 2018
Publication date	Aug 5, 2021
Grant date	—

Abstract

Provided is a work machine that has excellent motor support performance. A work machine that has: a motor that has a rotary shaft; a bearing that rotatably supports the rotary shaft; and a motor housing part that houses the motor. The motor housing part can be divided into at least two segments in the axial direction of the rotary shaft. At least one of the two segments: forms an integral structure that cannot be divided; and supports the bearing.

First claim

1 . A work machine, comprising:
a motor comprising a rotary shaft; a bearing rotatably supporting the rotary shaft; a motor housing part housing the motor; and a battery pack for supplying power to the motor; wherein the motor housing part is provided with a battery attachment/detachment part to which the battery pack is attached/detached, the battery attachment/detachment part comprises two rails engaged with the battery pack, the motor housing part is divisible into at least two segments in an axial direction of the rotary shaft, one of the two rails is provided in one of the two segments, and the other one of the two rails is provided in the other of the two segments, and at least one of the two segments is configured to form an indivisible integral structure and supports the bearing.

2 . The work machine according to claim 1 , wherein the motor housing part is provided with a plurality of electronic parts to be exposed to an outside,
and the plurality of electronic parts are respectively provided in positions different in a rotation direction of the rotary shaft.

3 . The work machine according to claim 2 , wherein the electronic parts are clamped by the two segments.

4 . The work machine according to claim 1 , wherein the battery attachment/detachment part comprises a machine side terminal electrically connected to the battery pack,
and the machine side terminal is clamped by the two segments.

5 . The work machine according to claim 2 , wherein the motor housing part is provided with a lighting,
and the lighting is clamped by the two segments.

6 . The work machine according to claim 5 , wherein the motor housing part is provided with an operation panel capable of turning on and off the lighting,
and the operation panel is clamped by the two segments.

7 . The work machine according to claim 1 , wherein one of the two segments is provided with an inner wall, and an outer wall located outside of the inner wall,
and, by joining the inner wall to the other of the two segments, the two segments are fixed to each other.

8 . The work machine according to claim 1 , comprising a fan rotating integrally with the rotary shaft;
wherein the motor housing part is provided with an inlet port, and the motor is cooled by the air flowing in from the inlet port.

9 . The work machine according to claim 8 , wherein, by an inner wall provided in one of the two segments, an inside of the motor housing part is separated into an inner space and an outer space,
and the outer space is isolated from a flow path of air flowing in from the inlet port.

10 . The work machine according to claim 9 , wherein the motor housing part is provided with electronic parts to be exposed to an outside,
and the electronic components are clamped by the two segments in a manner that at least a part of the electronic components is located in the outer space.

11 . The work machine according to claim 8 , wherein a fan guiding part protruding from an inner surface is integrally formed on the other of the two segments,
and the flow of the air is guided by the fan guiding part.

12 . The work machine according to claim 9 , wherein the air flows in the motor housing part along the axial direction of the rotary shaft,
and the outer space communicates with the inner space downstream of the electronic parts in the direction in which the air flows.

13 . A work machine, comprising:
a motor comprising a rotary shaft; a bearing rotatably supporting the rotary shaft; and a motor housing part housing the motor; wherein the motor housing part is divisible into at least two segments in an axial direction of the rotary shaft; in the motor housing part, a plurality of electronic parts are clamped by the two segments to be exposed to an outside; and the plurality of electronic parts are respectively provided in positions different in a rotation direction of the rotary shaft.

14 . (canceled)

Assignees

• Koki Holdings Co Ltd

Inventors

• Kumakura Takeru
• Ushiwata Shigeharu

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• B25F5/008 Primary

  Cooling means · CPC title

• B25F5/02

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

• B23D47/12 Primary

  of drives for circular saw blades · CPC title

• B27B5/29

  Details; Component parts; Accessories · CPC title