Mobile hand-held sawing machine having pre-cutting assembly and grip

Patent metadata

Field	Value
Publication number	US-12459157-B2
Application number	US-202017783772-A
Country	US
Kind code	B2
Filing date	Dec 13, 2020
Priority date	Dec 13, 2019
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A mobile hand-held sawing machine having: a sawing assembly ( 11 ), which has a sawing tool holder ( 14 ) for a sawing tool ( 15 ) and a saw drive motor ( 12 ) for driving the sawing tool holder ( 14 ); and a guide device ( 17 ), which has a guide body ( 18 ) having a guide face ( 19 ), extending along a longitudinal axis (L), for guiding the hand-held sawing machine ( 10 ) in a working direction (AR) on a workpiece (W); the hand-held sawing machine ( 10 ) having a pre-cutting assembly ( 31 ), which is arranged on the guide device ( 17 ) in front of the sawing assembly ( 11 ) in relation to the working direction (AR) in a longitudinal position in relation to the longitudinal axis (L) and has a pre-cutter tool holder ( 34 ) for a pre-cutting tool ( 35 ) and a pre-cutter drive ( 32 A) for driving the pre-cutter tool holder ( 34 ).

First claim

The invention claimed is:

1 . A mobile handheld machine saw having a saw assembly, which has a saw toolholder for a saw tool and a saw drive motor for driving the saw toolholder, and having a guide device, which has a guide body having a guide surface extending along a longitudinal axis for guiding the handheld machine saw along a working direction on a workpiece or a guide rail, wherein a saw cut can be introduced along the working direction into the workpiece by means of the saw tool protruding in front of the guide surface in sawing operation of the handheld machine tool, wherein the handheld machine saw has a scoring assembly, which is arranged in front of the saw assembly in a longitudinal position with respect to the longitudinal axis on the guide device with respect to the working direction, having a scorer toolholder for a scoring tool, and having a scorer drive for driving the scorer toolholder, which is movably mounted on or with respect to the guide device by means of a scorer depth setting bearing along a depth setting movement path between at least one active position, in which the scoring tool arranged on the scorer toolholder protrudes in front of the guide surface to introduce a score upstream from the saw cut to be introduced in the working direction into the workpiece, and an inactive position, in which the scoring tool is adjusted behind the guide surface and wherein the handheld machine saw further comprises a scorer handle body assigned to the scoring assembly having a handle surface for an operator for guiding the handheld machine tool, which is arranged on an upper side of the guide device opposite to the guide surface in the longitudinal position of the scorer toolholder or the scoring assembly, and
wherein the saw toolholder is movably mounted on or with respect to the guide device by means of a saw depth setting bearing between an upper depth setting position and at least one lower depth setting position, wherein the saw tool protrudes farther in front of the guide surface in the lower depth setting position than in the upper depth setting position, and wherein the saw depth setting bearing is separate from the scorer depth setting bearing, and wherein the handheld machine saw has a driving device, the driving device providing a driving coupling between the saw toolholder and the scorer toolholder whereby, upon a movement of the saw toolholder between depth setting positions, the scorer toolholder is carried along between the inactive position and the at least one active position, wherein the driving device has an actuation generator arranged on the saw assembly for actuating an actuation acceptor arranged on the scoring assembly.

2 . The handheld machine saw as claimed in claim 1 , wherein the scorer handle body and/or the scoring assembly forms the frontmost component of the handheld machine saw in the working direction or the frontmost component that can be grasped by an operator or the frontmost component that protrudes from the upper side of the guide device and can be grasped by an operator, which is arranged on the guide body.

3 . The handheld machine saw as claimed in claim 1 , wherein the saw depth setting bearing is arranged at a longitudinal distance from the scorer depth setting with respect to the working direction on the guide body.

4 . The handheld machine saw as claimed in claim 1 , further comprising at least one saw assembly handle, using which the saw toolholder, is actuatable between the upper depth setting position and the at least one lower depth setting position, wherein the scorer handle body assigned to the scoring assembly comprises the at least one saw assembly handle is formed by the at least one saw assembly handle, wherein the scorer toolholder is actuatable by means of the saw assembly handle between the inactive position and the at least one active position and the saw assembly handle is actuatable with respect to the guide body beyond a position assigned to the active position of the scorer toolholder to adjust the saw toolholder into the at least one lower depth setting position.

5 . The handheld machine saw as claimed claim 1 , wherein the scorer handle body is arranged fixed in place on the guide device with respect to the depth setting movement path of the scorer toolholder, so that its handle surface is fixed in place with respect to the depth setting movement path and can be loaded with an actuating force in the force direction of the movement path.

6 . The handheld machine saw as claimed in claim 1 , wherein the scorer handle body is arranged pivot-fixed on the guide device.

7 . The handheld machine saw as claimed in claim 1 , wherein the scorer drive is arranged between the upper side of the guide device and the handle surface of the scorer handle body.

8 . The handheld machine saw as claimed in claim 1 , wherein the scorer handle body is arranged on a scoring assembly housing of the scoring assembly or is formed by the scoring assembly housing, wherein the scoring assembly housing has a receptacle space in which at least one movable component of the scoring assembly is accommodated movably relative to the scorer handle body.

9 . The handheld machine saw as claimed in claim 8 , wherein the at least one movable component comprises the scorer drive and/or the scorer depth setting means.

10 . The handheld machine saw as claimed in claim 8 , wherein the handle surface is formed by a wall of the scoring assembly or is arranged on the wall.

11 . The handheld machine saw as claimed in claim 8 , wherein the handle surface of the scorer handle body is arranged on a part of the scoring assembly housing facing away from the upper side of the guide body.

12 . The handheld machine saw as claimed in claim 1 , wherein an intermediate space or distance is provided between a saw assembly housing and the scorer handle body and/or the scoring assembly housing, in relation to the longitudinal axis of the guide device or the guide body, in which at least one actuating element of the scoring assembly provided for actuation by an operator, is arranged.

13 . The handheld machine saw as claimed in claim 1 , wherein the scorer handle body comprises a handle body separate from a scoring assembly housing of the scoring assembly.

14 . The handheld machine saw as claimed in claim 13 , wherein an intermediate space is provided between the scorer handle body and the scoring assembly, so that an operator can reach into the intermediate space to grasp the scorer handle body.

15 . The handheld machine saw as claimed in claim 1 , wherein the scorer handle body is pivotably mounted on the guide device to change the relative position of the scorer handle body to the guide surface by means of a pivot bearing arrangement, around a pivot axis, parallel to the working direction or to the longitudinal axis of the guide device.

16 . The handheld machine saw as claimed in claim 1 , wherein the scorer handle body is arranged fixed in place on a carrier for accommodating the saw tool and/or the scoring tool, for the scoring assembly and/or the scorer toolholder, wherein the carrier is pivotable relative to the guide device to change the relative position of the scorer toolholder to the guide surface, around at least one pivot axis, parallel to the working direction or to the longitudinal axis of the guide device.

17 . The handheld machine saw as claimed in claim 16 , wherein the saw toolholder is arranged on the carrier.

18 . The handheld machine saw as claimed in claim 16 , wherein the guide body has a handle part on its

Assignees

• Festool Gmbh

Inventors

• Sobl Philipp
• Spengler Wolfgang
• Haible Marco

Classifications

• B27B9/02

  Arrangements for adjusting the cutting depth or the amount of tilting · CPC title

• B23D45/105 Primary

  operating within the same plane · CPC title

• B27G19/04 Primary

  for manually-operated power-driven circular saws · CPC title

• B27G19/10

  Measures preventing splintering of sawn portions of wood · CPC title

• B23D45/165

  with a plurality of saw blades or saw blades having plural cutting zones · CPC title