Power-Tool Cutting Device

Patent metadata

Field	Value
Publication number	US-2018162007-A1
Application number	US-201615580654-A
Country	US
Kind code	A1
Filing date	Jul 4, 2016
Priority date	Jul 27, 2015
Publication date	Jun 14, 2018
Grant date	—

Abstract

A power-tool cutting device includes at least one cutting strand, at least one guide unit configured to guide the cutting strand, and at least one deflecting unit. The guide unit together with the cutting strand forms a closed system. The deflecting unit is arranged on a drive-remote side of the guide unit and has at least one movably mounted deflecting element configured to deflect the cutting strand at least while the cutting strand revolves about the guide unit. The deflecting element includes at least one contact surface for an at least temporary contact with the cutting strand. The deflecting element is configured to be at least substantially free from an extension for engagement in the cutting strand.

First claim

1 . A power-tool cutting device, comprising:
at least one cutting strand; at least one guide unit configured to guide the cutting strand, the guide unit together with the cutting strand forming a closed system; and at least one deflection unit arranged on a drive-remote side of the guide unit, the deflection unit including at least one movably mounted deflection element configured to deflect the cutting strand at least during rotation of the cutting strand around the guide unit, wherein the deflection element includes at least one contact surface configured to at least temporarily contact the cutting strand, the deflection element realized at least substantially free of a continuation for engagement in the cutting strand.

2 . The power-tool cutting device as claimed in claim 1 , wherein the deflection element is configured as a deflection disk.

3 . The power-tool cutting device as claimed in claim 1 , wherein the deflection element comprises an at least substantially circular configuration.

4 . The power-tool cutting device as claimed in claim 1 , wherein the contact surface configured to contact the cutting strand of the deflection element at least temporarily is configured at least in part in a friction-reducing manner.

5 . The power-tool cutting device as claimed in claim 1 , wherein the deflection unit includes at least one further deflection unit surrounded at least in part by the deflection element.

6 . The power-tool cutting device as claimed in claim 1 , wherein the deflection unit includes at least one further deflection element which is movably mounted and comprises a sliding surface that is configured to provide a sliding movement of the further deflection element relative to the deflection element.

7 . The power-tool cutting device as claimed in claim 1 , wherein the guide unit comprises (i) an inlet region for the cutting strand which adjoins the deflection element at least substantially and (ii) an outlet region for the cutting strand which adjoins the deflection element at least substantially, the inlet region configured differently than the outlet region.

8 . The power-tool cutting device as claimed in claim 1 , wherein the guide unit comprises a longitudinal axis and at least one guide element which is configured asymmetrically to the longitudinal axis and delimits a receiving region for the deflection element.

9 . The power-tool cutting device as claimed in claim 1 , wherein the guide unit comprises at least one guide element which comprises at least one transfer continuation that is configured to provide an at least substantially seamless transition of the cutting strand from the guide element to the deflection element when the cutting strand moves relative to the guide element.

10 . A power tool system, comprising:
at least one power-tool cutting device including:
at least one cutting strand,
at least one guide unit configured to guide the cutting strand, the guide unit together with the cutting strand forming a closed system, and
at least one deflection unit arranged on a drive-remote side of the guide unit, the deflection unit including at least one movably mounted deflection element configured to deflect the cutting strand at least during rotation of the cutting strand around the guide unit,
wherein the deflection element includes at least one contact surface configured to at least temporarily contact the cutting strand, the deflection element realized at least substantially free of a continuation for engagement in the cutting strand; and
at least one portable power tool which comprises at least one coupling device for one or more of positive locking and friction locking coupling with the power-tool cutting device.

Assignees

• Bosch Gmbh Robert

Inventors

• Engelfried Uwe
• Grulich Petr

Classifications

• B27B17/02

  Chain saws equipped with guide bar (B27B17/06 takes precedence) · CPC title

• B27B17/04 Primary

  Roller bearing guides · CPC title