Work machine

Patent metadata

Field	Value
Publication number	US-11969810-B2
Application number	US-201917263525-A
Country	US
Kind code	B2
Filing date	Sep 20, 2019
Priority date	Sep 28, 2018
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

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

What is claimed is:

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;
a battery pack for supplying power to the motor; and
a fan rotating integrally with the rotary shaft;
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 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 of the two rails is provided in the other of the two segments, and
at least the one of the two segments is configured to form an indivisible integral structure and supports the bearing,
wherein the motor housing part is provided with an inlet port, and the motor is cooled by air flowing in from the inlet port,
wherein, by an inner wall provided in the 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 the air flowing in from the inlet port.

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 one of the plurality of electronic parts and other one of 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 2 , wherein the motor housing part is provided with a lighting,
and the lighting is clamped by the two segments.

5. The work machine according to claim 4 , 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.

6. 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.

7. The work machine according to claim 1 , wherein the 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 , wherein the motor housing part is provided with electronic parts to be exposed to an outside,
and the electronic parts are clamped by the two segments in a manner that at least a part of the electronic parts is located in the outer space.

9. The work machine according to claim 1 , wherein a fan guiding part protruding from an inner surface of the other of the two segments is integrally formed on the other of the two segments,
and the flow of the air is guided by the fan guiding part.

10. The work machine according to claim 1 , wherein the air flows in the motor housing part along the axial direction of the rotary shaft and the motor housing part is provided with electronic parts to be exposed to an outside,
and the outer space communicates with the inner space downstream of the electronic parts in the direction in which the air flows.

11. 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 two segments in an axial direction of the rotary shaft;
in the motor housing part, electronic parts are clamped by the two segments to be exposed to an outside;
and one of the electronic parts and other one of the electronic parts are respectively provided in positions different in a rotation direction of the rotary shaft,
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.

12. 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 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 of the two rails is provided in the other of the two segments, and
at least the one of the two segments is configured to form an indivisible integral structure and supports the bearing,
wherein the 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.

Assignees

• Koki Holdings Co Ltd

Inventors

• Kumakura Takeru
• Ushiwata Shigeharu

Classifications

• B23D47/132

  of means to position the saw blade at a specified angle when adjusting about an axis perpendicular to the work support surface · CPC title

• B23D47/128

  of means to position the saw blade at a specified angle when adjusting about an axis parallel to the work support surface · CPC title

• B23D47/12 Primary

  of drives for circular saw blades · CPC title

• B25F5/02

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

• B27B5/29

  Details; Component parts; Accessories · CPC title