Dust collector

Patent metadata

Field	Value
Publication number	US-10864609-B2
Application number	US-201816133887-A
Country	US
Kind code	B2
Filing date	Sep 18, 2018
Priority date	Sep 28, 2017
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A dust collector includes a body configured to be removably attached to a lower side of a tool body of a drilling tool, a dust storing part to be disposed on a lower side of the body, a sliding part having a suction port and held by the body so as to be slidable in a front-rear direction, a dust transfer passage extending within the sliding part and connecting the suction port and an inlet of the dust storing part, and a tool connection passage disposed within an internal space of the body and configured to connect an outlet of the dust storing part and an inlet of the tool body of the drilling tool. The dust storing part includes the inlet, a filter, a dust storing space and the outlet. The filter is disposed forward of the inlet of the dust storing part.

First claim

What is claimed is:

1. A dust collector configured to be removably attached to a drilling tool, the drilling tool including a tool body having a first inlet that is a first opening in a lower end portion of the tool body and a grip part protruding downward from the tool body, the dust collector being configured to collect dust by using an air flow generated by the drilling tool and led into the tool body from the first inlet, the dust collector comprising:
a body configured to be removably attached to a lower side of the tool body and including:
a hollow body having an internal space and an opening, the internal space extending in a front-rear direction and the opening being open forward, the internal space and an outside of the hollow body being communicated with each other through the opening;
a dust storing part located on a lower side of the body when the body is attached to the tool body of the drilling tool, the dust storing part including:
a second inlet that is a second opening in a housing of the dust storing part through which the dust flows into the dust storing part together with the air flow;
a filter configured to separate the dust from the air flow;
a dust storing space in which the separated dust is stored; and
an outlet that is a third opening in the housing of the dust storing part through which the air flow from which the dust has been separated flows out; and

a tool connection passage disposed within the internal space of the hollow body and configured to connect the outlet of the dust storing part and the first inlet when the body is attached to the tool body;
a sliding part having a suction port for the dust, and held by the body so as to be slidable in the front-rear direction within the internal space in a state in which the suction port protrudes forward from the body through the opening; and
a dust transfer passage extending within the sliding part and connecting the suction port of the sliding part and the second inlet;
wherein:
the filter is disposed forward of the second inlet; and
the outlet of the dust storing part faces upward and is directly connected to the tool connection passage.

2. The dust collector as defined in claim 1 , wherein the outlet is disposed rearward of the first inlet.

3. The dust collector as defined in claim 2 , wherein the dust storing part includes:
an inflow passage connecting the second inlet and the dust storing space; and
a communication passage communicating with the dust storing space via the filter and connected to the outlet, the air flow from which the dust has been separated by the filter being allowed to pass through the communication passage, wherein:
the communication passage is disposed to overlap with the inflow passage in a left-right direction.

4. The dust collector as defined in claim 3 , wherein the dust storing part includes:
a container body formed as a hollow body having an opening which is open upward, the container body having the dust storing space;
a filter holder mounted on an upper end portion of the container body so as to close the opening of the container body and holding the filter within the container body; and
a cover mounted on an upper end portion of the filter holder so as to cover the filter holder from above in a sealing manner, wherein:
the communication passage is formed between the filter holder and the cover in an up-down direction.

5. The dust collector as defined in claim 4 , wherein the filter is mounted to the filter holder in a sealing manner.

6. The dust collector as defined in claim 2 , wherein the dust storing space includes a space below the outlet.

7. The dust collector as defined in claim 1 , wherein the entire filter is disposed forward of the second inlet.

8. The dust collector as defined in claim 1 , wherein an upper portion of the filter is fixed to the housing of the dust storing part.

9. The dust collector as defined in claim 1 , wherein:
the dust storing part includes:
an airflow passage between the second inlet and the dust storing space; and
a communication passage connected to the outlet, extending between the filter and the outlet, and configured such that the air flow flows through the communication passage after passing through the filter;
wherein the communication passage is between the dust transfer passage and the filter vertically.

10. The dust collector as defined in claim 1 , wherein the outlet is above the filter.

11. A hammer drill configured to perform a hammering operation of linearly driving a tool accessory along a driving axis and a drilling operation of rotationally driving the tool accessory around the driving axis, the hammer drill comprising:
a tool body having a first inlet that is a first opening in a lower end portion of the tool body;
a motor housed in a motor-housing part of the tool body and having a motor shaft extending parallel to the driving axis;
a fan mounted on the motor shaft and configured to generate an air flow flowing into the tool body from the first inlet; and
a dust collector comprising;
a body configured to be removably attached to a lower side of the tool body such that the entire body is located below the motor-housing part, the body including:
a hollow body having an internal space and an opening, the internal space extending in a front-rear direction and the opening being open forward, the internal space and an outside of the hollow body being communicated with each other through the opening:
a dust storing part located in a lower side of the body of the dust collector when the body is attached to the tool body, the dust storing part including:
a second inlet that is a second opening in a housing of the dust storing part through which the dust flows into the dust storing part together with the air flow;
a filter configured to separate the dust from the air flow;
a dust storing space in which the separated dust is stored; and
an outlet that is a third opening in the housing of the dust storing part through which the air flow from which the dust has been separated flows out, and
a tool connection passage disposed within the internal space of the hollow body and configured to connect the outlet of the dust storing part and the first inlet when the body is attached to the tool body;
a sliding part having a suction port for the dust, and held by the hollow body so as to be slidable in the front-rear direction within the internal space in a state in which the suction port protrudes forward from the body through the opening; and
a dust transfer passage extending within the sliding part and connection the suction port of the sliding part and the second inlet,
wherein the filter is disposed forward of at least one of the second inlet and outlet.

12. The hammer drill as defined in claim 11 , further comprising:
a motor including a motor body and a motor shaft, the motor body including a stator and a rotor, the motor shaft extending parallel to the driving axis and having the fan mounted on the motor shaft; and
a covering member configured to open and close the first inlet,
wherein:
the tool body includes a mounting part to which and from which the dust collector is attachable and detachable in parallel to the driving axis, and
the covering member is configured to be held in a close position in which the covering member closes the first inlet when the dust collector is not attached to the mounting part, and to be moved to an open position in interlock with attaching of the dust collector to the mounting part.

13. A dust collector configured to be removably attached to a drilling tool, the drilling tool including a tool body having a first inlet

Assignees

• Makita Corp

Inventors

• Mori Keita
• Yoshikane Kiyonobu

Classifications

• B25F5/00

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• B23Q11/0071 Primary

  dust collectors for hand tools · CPC title

• B25D2211/061

  Swash-plate actuated impulse-driving mechanisms · CPC title

• B23Q11/0046 Primary

  by sucking · CPC title

• B25D2216/0084

  Mode-changing mechanisms · CPC title