Work machine

Patent metadata

Field	Value
Publication number	US-12558730-B2
Application number	US-202218566541-A
Country	US
Kind code	B2
Filing date	Mar 25, 2022
Priority date	Jun 4, 2021
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The present invention improves workability. A cutting work machine has a discharge channel, concave with a discharge opening open to the left, disposed at an outer peripheral portion of a saw cover. A discharge inlet portion that connects the saw cover and the discharge channel are formed at a front end of the discharge channel. Viewed from above, a side guide surface constituting the right-side surface of the discharge channel inclines to the left toward the rear. The rear surface of the discharge channel consists of a rear guide surface inclined to the rear toward the left side. Thus, cutting chips flowing towards the rear-end side of the discharge channel along the side guide surface hit the rear guide surface and changes the chip outflow direction to the left side (discharge opening side). With cutting chips being discharged substantially leftward from the discharge opening, the workability of the cutting work machine improves.

First claim

What is claimed is:

1 . A work machine comprising:
an output shaft driven by a power of a prime mover; a disk-shaped circular saw blade held at an end portion of the output shaft in one side in an axial direction of the output shaft; a saw cover that covers the circular saw blade; and a discharge channel provided at the saw cover, disposed radially outside of the circular saw blade, with a discharge opening opened to one side in the axial direction, and discharges chips that flow backward inside the saw cover during processing through the discharge opening, wherein the discharge channel has a first guide surface that extends in a direction that intersects a direction of movement of the chips that flows into the discharge channel and guides the chips to the discharge opening, and a second guide surface that is connected between the first guide surface and the discharge opening, wherein at least one of the first guide surface and the second guide surface is configured as a plane surface, and the second guide surface has a greater inclination angle with respect to the direction of movement than the first guide surface.

2 . The work machine according to claim 1 ,
wherein the direction of movement is backward or downward.

3 . The work machine according to claim 1 ,
wherein the discharge channel includes: a side guide surface that constitutes a side surface on other side in the axial direction in the discharge channel and inclines toward one side in the axial direction toward a rear side when viewed from above; and a rear guide surface that constitutes a rear surface of the discharge channel, is connected to a rear end of the side guide surface, and changes the direction of the chips flowing backward along the side guide surface to one side in the axial direction, wherein the first guide surface is the side guide surface and the second guide surface is the rear guide surface, wherein the direction of movement is backward.

4 . The work machine according to claim 1 ,
wherein the discharge channel includes: a side guide surface that constitutes a side surface on other side in the axial direction in the discharge channel and inclines toward one side in the axial direction toward a rear side when viewed from above; a rear guide surface that constitutes a rear surface of the discharge channel, is connected to a rear end of the side guide surface, and changes the direction of the chips flowing backward along the side guide surface to one side in the axial direction; and a lower-guide surface that constitutes a lower surface of the discharge channel, is disposed adjacent to the side guide surface and the rear guide surface, and is inclined downward toward one side in the axial direction when viewed from front-back direction, wherein the lower-guide surface has an upper lower-guide surface that constitutes an upper portion of the lower-guide surface, and a lower lower-guide surface that constitutes a lower portion of the lower-guide surface, wherein the first guide surface is the upper lower-guide surface and the second guide surface is the lower lower-guide surface, wherein the direction of movement is downward.

5 . The work machine according to claim 1 ,
wherein the first guide surface is plane.

6 . The work machine according to claim 1 ,
wherein the second guide surface is plane.

7 . The work machine according to claim 1 ,
wherein both the first and second guide surfaces are plane.

8 . A work machine comprising:
an output shaft driven by a power of a prime mover; a disk-shaped circular saw blade held at an end portion of the output shaft in one side in an axial direction of the output shaft; a saw cover that covers the circular saw blade; and a discharge channel provided at the saw cover, disposed radially outside of the circular saw blade, with a discharge opening opened to one side in the axial direction, and discharges chips that flow backward inside the saw cover during processing through the discharge opening, wherein the discharge channel includes: an inlet portion formed at a front end of the discharge channel and communicate an inside of the saw cover with an inside of the discharge channel; a side guide surface that constitutes a side surface on other side in the axial direction in the discharge channel and inclines toward one side in the axial direction toward a rear side when viewed from above; and a rear guide surface that constitutes a rear surface of the discharge channel, is connected to a rear end of the side guide surface, and changes the direction of the chips flowing backward along the side guide surface to one side in the axial direction; and a lower-guide surface that constitutes a lower surface of the discharge channel, is disposed adjacent to the side guide surface and the rear guide surface, and is inclined downward toward one side in the axial direction when viewed from front-back direction, wherein the lower-guide surface includes: an upper lower-guide surface that constitutes an upper portion of the lower-guide surface; and a lower lower-guide surface that constitutes a lower portion of the lower-guide surface, wherein an inclination angle of the upper lower-guide surface with respect to up-down direction is set smaller than the inclination angle of the lower lower-guide surface with respect to the up-down direction.

9 . The work machine according to claim 8 ,
wherein the rear guide surface is inclined rearwardly toward one side in the axial direction, when viewed from above.

10 . The work machine according to claim 8 ,
wherein an inclination angle of the rear guide surface with respect to the front-back direction is set greater than the inclination angle of the side guide surface with respect to the front-back direction when viewed from above.

11 . The work machine according to claim 8 ,
wherein a width of the upper lower-guide surface in the up-down direction is set to increase toward the rear side when viewed from one side in the axial direction.

12 . The work machine according to claim 1 ,
wherein the discharge opening is inclined downward toward a rear side, when viewed from the axial direction.

13 . A work machine comprising:
an output shaft driven by a power of a prime mover; a disk-shaped circular saw blade held at an end portion of the output shaft in one side in an axial direction of the output shaft; a saw cover that covers the circular saw blade from at least one side in the axial direction and from radially outside of the circular saw blade; and a discharge channel provided at the saw cover, disposed radially outside of the circular saw blade, formed in a concave shape with a discharge opening opened to one side in the axial direction, and discharges chips that flow backward inside the saw cover during processing through the discharge opening, wherein the discharge channel includes: an inlet portion formed at a front end of the discharge channel and opened to a front side to communicate an inside of the saw cover with an inside of the discharge channel; a side guide surface that constitutes a side surface on the other side in the axial direction in the discharge channel and inclines toward one side in the axial direction toward a rear side when viewed from above; and a rear guide surface that constitutes a rear surface of the discharge channel, is connected to a rear end of the side guide surface, and inclines rearward toward one side in the axial direction when viewed from above, wherein, at least one of the side guide surface and the rear guide surface is configured as a plane surface, and an inclination angle of the rear guide s

Assignees

• Koki Holdings Co Ltd

Inventors

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

Classifications

• B23D59/006

  for removing or collecting chips · CPC title

• B23D47/02

  of frames; of guiding arrangements for work-table or saw-carrier · CPC title

• B28D7/02

  for removing or laying dust, e.g. by spraying liquids; for cooling work · CPC title

• B27G3/00

  Arrangements for removing bark-zones, chips, waste, or dust, specially designed for use in connection with wood-working machine or in wood-working plants {(B23Q11/0042 takes precedence)} · 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