Dust collecting device and impact tool

Patent metadata

Field	Value
Publication number	US-9314913-B2
Application number	US-201113807789-A
Country	US
Kind code	B2
Filing date	Jul 4, 2011
Priority date	Jul 8, 2010
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

In a dust collection device that collects dust particles that an impact tool generates, disclosed is a feature that can accommodate the lengths of tool bits that are mounted to the impact tool when a machining operation is executed by exchanging tool bits of different lengths. The dust collection device collects dust that the impact tool generates and is attached to said impact tool that, in the lengthwise direction, linearly operates the tool bit mounted to the end region of a tool body. The dust collection device has a dust intake port that sucks dust, and said dust intake port can be repositioned in the lengthwise direction of the tool bit in accordance with the length in the lengthwise direction of said tool bit.

First claim

The invention claimed is:

1. A dust collecting device that is attached to an impact tool and collects dust generated by the impact tool in which a tool bit coupled to a front end region of a tool body is caused to rectilinearly move in an axial direction of the tool bit, comprising:
a dust suction port through which dust is sucked up and which can be adjusted in position in the axial direction of the tool bit according to a length of the tool bit in the axial direction,
a dust collecting part having the dust suction port at its front end,
a dust transfer part which is connected to the dust collecting part in order to transfer dust downstream from the dust suction port, the dust transfer part comprising a dust collecting hose which extends in the axial direction of the toll bit and has a bellow-like part formed at least in part of the dust collecting hose, and
a hose holding part which can be mounted to the tool body and engaged with the bellow-like part so as to hold the dust collecting hose on the tool body,
wherein the position of the dust suction part in the axial direction of the tool bit can be adjusted by changing as engagement position of the bellow-like part in an axial direction with respect to the hose holding part.

2. The dust collecting device as defined in claim 1 , wherein the hose holding part includes an annular member through which the dust collecting hose is loosely inserted, an engagement member which is formed on the annular member and can be engaged with the bellows-like part, and a biasing member which constantly biases the engagement member in a direction in which the engagement member is engaged with the bellows-like part, and wherein the engagement member can be moved in a radial direction of the annular member between a position of engagement with the bellows-like part and a position of disengagement from the bellows-like part.

3. An impact tool having the dust collecting device as defined in claim 1 .

4. A dust collecting device that is attached to an impact tool and collect dust generated by the impact toll in which a tool bit coupled to a front end region of a tool body is caused to rectilinearly move in a axial direction of the tool bit, comprising:
a dust suction port through which dust is sucked up and which can be adjusted in position in the axial direction of the tool bit according to a length of the tool bit in the axial direction,
a bit covering which is arranged to surround the tool bit and has the dust suction port formed at its front end,
wherein the bit covering comprises a plurality of cylindrical members which are fitted one on the other and can be moved relative to each other in the axial direction of the tool bit, and the position of the dust suction port can be adjusted by relative movement of the cylindrical members, and
the plurality of cylindrical members are configured to be moved relative to each other thereby adjusting the position of the dust suction port in the axial direction of the tool bit and also configured to maintain the adjusted position of the dust suction port during a processing operation after the position adjustment.

5. The dust collecting device as defined in claim 4 , wherein a female thread is formed in one of the cylindrical members and an engagement projection is formed on the other and engages with the female thread, and when turned relative to each other in the circumferential direction, the cylindrical members can be moved relative to each other in the axial direction by engagement between the female thread and the engagement projection.

6. The dust collecting device as defined in claim 4 , wherein the cylindrical members can be moved relative to each other in the axial direction and the circumferential direction, and one of the cylindrical members has a recess and the other has a projection which can be engaged with and disengaged from the recess by relative movement of the cylindrical members in the circumferential direction, and wherein at least one of the recess and the projection is arranged in plurality in the axial direction of the cylindrical members.

7. The dust collecting device as defined in claim 4 , wherein the cylindrical members can be telescopically slid with respect to each other in the axial direction, and a projection is formed on one of a sliding inner surface of one cylindrical member and a sliding outer surface on the other adjacent cylindrical member, and a recess is formed in the other of the sliding inner surface and the sliding outer surface and can be engaged with and disengaged from the projection by elastic deformation, and wherein the adjacent cylindrical members are held in the engaged position by engagement between the projection and the recess.

Assignees

• Ikuta Hiroki
• Yamauchi Ken
• Hanai Takamasa
• Machida Yoshitaka
• Higashi Masanori
• Nakashima Tatsuo
• Sasaki Yoshinori
• Makita Corp

Inventors

• Ikuta Hiroki
• Yamauchi Ken
• Hanai Takamasa
• Machida Yoshitaka
• Higashi Masanori
• Nakashima Tatsuo
• Sasaki Yoshinori

Classifications

• B23Q11/0046 Primary

  by sucking · CPC title

• B25D17/22 Primary

  using pressure fluid · CPC title

• Y02P70/171

  Cross-Sectional Technologies · mapped topic

• B25D17/04

  Handles; Handle mountings · CPC title

• B23Q11/0825

  Relatively slidable coverings, e.g. telescopic · CPC title