Work machine

Patent metadata

Field	Value
Publication number	US-12485495-B2
Application number	US-202118015077-A
Country	US
Kind code	B2
Filing date	Jul 9, 2021
Priority date	Jul 15, 2020
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A work machine according to the present invention optimally collects work chips, such as dust, produced during work. In a circular saw 10 , a sawdust discharge port 27 H and a cover opening 27 J are formed in an inner cover 27 , and a dust collecting chamber inlet 62 L 1 and a dust collecting chamber outlet 62 L 2 are formed in a dust collecting case 60 . Furthermore, at least a portion of the dust collecting chamber inlet 62 L 1 and at least a portion of the dust collecting chamber outlet 62 L 2 are arranged at the same position in the vertical direction.

First claim

The invention claimed is:

1 . A work machine, comprising:
a base formed in a plate shape; a circular saw rotated around a shaft along a left-right direction by a motor and partially protrudes below the base; a housing supported by the base on an upper side of the base and accommodating the motor; a cover covering at least a part of the circular saw; and a dust collecting structure comprising a dust collecting chamber capable of collecting work chips produced by driving the circular saw, wherein the dust collecting structure is provided with:
an inlet serving as an entrance of the dust collecting chamber,
an inflow part connected with the inlet and serving as a passage of the work chips,
an outlet serving as an exit of the dust collecting chamber,
an outflow part connected with the outlet and serving as a passage for delivering air in the dust collecting chamber to an inner side of the cover, and
a partition wall, wherein
the cover is provided with a first opening for discharging the work chips from an inside of the cover towards the inlet and a second opening for introducing air from the outlet into the cover, and the inflow part extending from the inlet towards the first opening and the outflow part extending from the outlet towards the second opening are at least partially partitioned in the left-right direction by the partition wall, and a part of the partition wall is disposed adjacent to the cover and between the first opening and the second opening, and at least a part of the inlet and at least a part of the outlet are arranged at the same position in an up-down direction.

2 . The work machine according to claim 1 , wherein
the base is formed with a through-hole for making a part of the circular saw protrude downwards, the housing is connected to an adjustment mechanism capable of adjusting a protrusion amount of the circular saw from the through-hole, and at least a part of the inlet and at least a part of the outlet are arranged at the same position in the up-down direction at least when the protrusion amount of the circular saw is the maximum.

3 . The work machine according to claim 1 , wherein
the dust collecting structure comprises a cover member that covers the circular saw and that is provided in the housing, and the cover member covers the circular saw from an upper side.

4 . The work machine according to claim 3 , wherein
the inlet and the outlet are arranged side by side in a plate thickness direction of the circular saw.

5 . The work machine according to claim 3 , wherein
the first opening is arranged upstream of the second opening in a rotational direction of the circular saw.

6 . The work machine according to claim 3 , wherein
an area of the inlet is 80% to 120% of an area of the outlet.

7 . The work machine according to claim 6 , wherein
the dust collecting chamber is provided with the partition wall that partitions the inflow part and the outflow part.

8 . The work machine according to claim 7 , wherein
the dust collecting chamber is provided with a guide part that partitions the inflow part and the outflow part in a direction different from the partition wall.

9 . The work machine according to claim 8 , wherein
the work chips or air discharged from the inlet to the dust collecting chamber is guided by the guide part in a direction away from the outlet.

10 . The work machine according to claim 3 , wherein
the dust collecting structure comprises a dust collecting case configured to be detachable from the housing, and the inlet and the outlet are provided on the dust collecting case.

11 . The work machine according to claim 10 , wherein
the inflow part connects the inlet and the first opening, and the outflow part connects the outlet and the second opening, and the dust collecting case has an outflow part and the inflow part.

12 . A work machine that performs processing work in a forward direction by a circular saw rotated around a shaft along a left-right direction by a motor, the work machine having:
a cover covers at least a part of the circular saw; and a dust collection structure that collects dust produced by the processing work, in which the dust collection structure includes:
a dust collecting chamber for storing the dust,
a transfer part having an inflow part that delivers the dust to the dust collecting chamber and an outflow part that discharges air in the dust collecting chamber to an inside of the cover,
a partition wall having a first partition part connected to a bottom of the dust collecting chamber and extending upward to partition the dust collecting chamber and the transfer part and partially partitions the inflow part and the outflow part in the left-right direction, and
a communication part positioned above an upper end of the first partition part and communicating between the dust collecting chamber and the transfer part, wherein
the cover is provided with a first opening for discharging the dust from an inside of the cover towards the inflow part and a second opening for introducing air from the outflow part into the cover, a part of the partition wall is disposed adjacent to the cover and between the first opening and the second opening, and the communication part is provided with an inlet connected to the inflow part and an outlet connected to the outflow part, and is configured such that positions of one end of the inlet and one end of the outlet in the left-right direction are different from each other.

13 . The work machine according to claim 12 , wherein
at least a part of the inlet and at least a part of the outlet are configured to be arranged at different positions in the left-and-right direction or at the same position in an up-and-down direction.

14 . The work machine according to claim 12 , wherein
the transfer part is provided with a second partition part that partitions the inflow part and the outflow part in a front-and-rear direction, and a third partition part that partitions the inflow part and the outflow part in the left-and-right direction.

15 . A work machine, comprising:
a base formed in a plate shape; a housing supported by the base on an upper side of the base and accommodating a motor for driving a circular saw; and the circular saw rotated around a shaft along a left-right direction by the motor and partially protrudes downwards from the base; a cover covers at least a part of the circular saw; and a dust collecting structure comprising a dust collecting chamber capable of collecting work chips produced by driving the circular saw, wherein the dust collecting structure is provided with:
an inlet serving as an entrance of the dust collecting chamber,
an inflow part connected with the inlet and serving as a passage of the work chips,
an outlet serving as an exit of the dust collecting chamber,
an outflow part connected with the outlet and serving as a passage for delivering air in the dust collecting chamber to an inner side of the cover, and
a partition wall, wherein
the cover is provided with a first opening for discharging the work chips from the inner side of the cover towards the inlet and a second opening for introducing air from the outlet into the cover, the partition wall has a first partition part extending in an up-down direction, a second partition part connected to the first partition part, and a third partition part connected to the second partition part, wherein the first partition part at least partially partitions both the inflow part and the outflow part from the dust collection chamber in a front-to-rear dire

Assignees

• Koki Holdings Co Ltd

Inventors

• Tagami Hiroyuki
• Ichihashi Naoto

Classifications

• B25F5/02 Primary

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

• B23D59/006 Primary

  for removing or collecting chips · CPC title

• B23D59/0064 Primary

  by suction · CPC title