Mobile hand-held machine saw with a pivoting scoring assembly

Patent metadata

Field	Value
Publication number	US-12083609-B2
Application number	US-202017782245-A
Country	US
Kind code	B2
Filing date	Dec 13, 2020
Priority date	Dec 13, 2019
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

A mobile handheld machine saw ( 10 ) having a saw assembly ( 11 ), which has a saw toolholder ( 14 ) for a saw tool ( 15 ), in particular a saw blade, and a saw drive motor ( 12 ) for driving the saw toolholder ( 14 ), and having a guide device ( 17 ), which has a guide body ( 18 ) having a guide surface ( 19 ) for guiding the handheld machine saw ( 10 ) along a working direction (AR) on a workpiece (W) and on its upper side ( 19 A) opposite to the guide surface ( 19 ), the saw toolholder ( 14 ) is movably mounted by means of a saw depth setting bearing ( 16 ) between an upper depth setting position (UT) in which the saw toolholder ( 14 ) is adjusted closer to the guide surface ( 19 ) than in the upper depth setting position (OT).

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 and, on its upper side opposite to the guide surface, the saw toolholder as a whole is movably mounted by means of a saw depth setting bearing between an upper depth setting position and at least one lower depth setting position, in which the saw toolholder is adjusted closer to the guide surface than in the upper depth setting position, so that the saw tool, to introduce a saw cut into the workpiece, protrudes farther from the guide surface in the lower depth setting position than in the upper depth setting position;
wherein the hand-held machine saw further comprises a scoring assembly, arranged in front of the saw assembly 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, which is separate from the saw depth setting bearing, between at least one active position, in which the scoring tool arranged on the scorer toolholder protrudes from the guide surface to introduce a score, which is upstream in the working direction from a saw cut to be introduced, into the workpiece, and an inactive position, in which the scoring tool is adjusted behind the guide surface;
wherein the handheld machine saw, further comprising a driving device to provide a driving coupling between the saw toolholder and the scorer toolholder, by which, upon a movement of the saw toolholder between depth setting position, 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 driving device carries along the scorer toolholder in a first movement direction of the saw toolholder from the upper depth setting position in the direction of the at least one lower depth setting position and/or in a second movement direction from the at least one lower depth setting position in the direction of the upper depth setting position.

3. The handheld machine saw as claimed in claim 1 , wherein the driving device couples the scorer toolholder having a scoring tool arranged thereon and the saw toolholder having a saw tool arranged thereon in a scorer activation section with one another in such a way that the saw toolholder is adjustable into a lower depth setting position, in which the saw tool does not protrude in front of the guide surface, and the scorer toolholder is adjusted by the adjustment of the scorer toolholder into the lower depth setting position in the at least one active position, in which the scoring tool protrudes in front of the guide surface to penetrate into the workpiece.

4. The handheld machine saw as claimed in claim 3 , further comprising an only-scoring depth stop device, wherein the only-scoring depth stop device has a stop element, which is adjustable between a stop position, in which the stop element stops on a counter stop in the lower depth setting position of the saw toolholder, which is not provided for sawing, and a release position, in which the stop element is movable past the counter stop, so that the saw toolholder is adjustable into a lower depth setting position, in which the saw tool protrudes in front of the guide surface.

5. The handheld machine saw as claimed in claim 1 , wherein the driving device couples the saw toolholder having a saw tool arranged thereon and the scorer toolholder having a scoring tool arranged thereon in a scorer holding section with one another in such a way that the saw toolholder is adjustable between at least two different depth setting positions, in which the saw tool protrudes by different distances in front of the guide surface and/or in which the saw toolholder is adjusted differently close toward the guide device or the guide surface, and the scorer toolholder remains in essentially the same active position.

6. The handheld machine saw as claimed in claim 1 , wherein the driving device has a deactivation device for deactivating the driving coupling between the saw toolholder and the scorer toolholder, wherein the scorer toolholder, upon a movement of the saw toolholder between depth setting positions in a deactivation position of the deactivation device, remains in the inactive position, and in an activation position of the deactivation device, is actuated for adjustment between the inactive position and the at least one active position.

7. The handheld machine saw as claimed in claim 6 , wherein the deactivation device, has a switching element, for switching on the scorer drive, in the activation position and switching off the scorer drive in the deactivation position.

8. The handheld machine saw as claimed in claim 2 , wherein the actuation generator and the actuation acceptor are components of a link guide, in which one component of the actuation generator and the actuation acceptor is a guide link and the other component is a link follower guided on the guide link.

9. The handheld machine saw as claimed in claim 8 , wherein the guide link has a scorer activation section and a scorer holding section, wherein the scorer activation section, upon adjustment of the saw toolholder between depth setting positions, effectuates an adjustment of the scorer toolholder between the inactive position and the at least one active position and the scorer holding section effectuates holding of the scorer toolholder in a predetermined active position independently of an adjustment of the saw toolholder between depth setting positions.

10. The handheld machine saw as claimed in claim 8 wherein the link follower comprises a sliding body or a roller and/or is loaded by a spring arrangement in a contact position with the guide link and/or is arranged on an arm.

11. The handheld machine saw as claimed in claim 1 , wherein the actuation acceptor is pivotably mounted around the depth setting axis of the scorer depth setting bearing to set a distance of the scorer toolholder to the guide device or the guide surface and/or the penetration depth of the scoring tool into the workpiece in the at least one active position and/or to activate and deactivate the driving coupling between the saw toolholder and the scorer toolholder.

12. The handheld machine saw as claimed in claim 1 , wherein the actuation acceptor is arranged on an actuation acceptor arm, which protrudes from the depth setting axis of the scorer depth setting bearing and by which a positioning body can be brought into at least two pivot positions different from one another with respect to the depth setting axis, using which a distance of the scorer toolholder to the guide device or guide surface and/or a distance with which the scoring tool protrudes in front of the guide surface is settable.

13. The handheld machine saw as claimed in claim 2 , wherein the actuation acceptor arm is spring-loaded in a contact position by a spring arrangement toward the actuation generator or away from the actuation generator and/or an actuating surface is arranged on the actuation acceptor arm, with which actuating surface a positioning body interacts, using which different angle p

Assignees

• Festool Gmbh

Inventors

• Sobl Philipp
• Spengler Wolfgang
• Haible Marco

Classifications

• B27G19/10

  Measures preventing splintering of sawn portions of wood · CPC title

• B27G19/04

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

• B27B9/02

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

• B23D45/165

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

• B23D45/105 Primary

  operating within the same plane · CPC title