WO2012116838A1

WO2012116838A1 - Machine tool separating device

Info

Publication number: WO2012116838A1
Application number: PCT/EP2012/000950
Authority: WO
Inventors: Rudolf Fuchs; Petr Grulich; Uwe Engelfried
Original assignee: Robert Bosch Gmbh
Priority date: 2011-03-03
Filing date: 2012-03-02
Publication date: 2012-09-07
Also published as: DE102011005012A1; EP2680994B1; EP2680994A1

Abstract

The invention relates to a machine tool separating device, in particular a handheld machine tool separating device, having at least one cutting strand (12a; 12b) and having at least one guide unit (14a; 14b). According to the invention, the guide unit (14a; 14b) has at least one segmented guide element (16a, 18a, 20a, 22a; 16b, 22b) for guiding the cutting strand (12a; 12b), which element is provided to limit a movement of the cutting strand (12a; 12b), viewed in a direction facing away from the guide unit (14a; 14b), at least along a direction (24a, 26a; 24b, 26b) running at least substantially parallel to a cutting plane of the cutting strand (12a; 12b).

Description

description

Werkzeugmaschinentrennvorrichtunq

State of the art

Machine tool separating devices, in particular manual machine cutting devices, having at least one cutting strand and at least one guide fence are already known.

Disclosure of the invention

The invention is based on a power-tool parting device, in particular a hand-held power tool parting device, with at least one cutting strand and with at least one guide unit.

It is proposed that the guide unit has at least one segment guide element for guiding the cutting strand, which is intended to allow movement of the cutting strand in a direction away from the guide unit, at least along a direction at least substantially parallel to a cutting plane of the cutting strand limit. A "cutting strand" is to be understood here as meaning, in particular, a unit which is intended to locally cancel atomic cohesion of a workpiece to be machined, in particular by means of mechanical separation and / or by means of mechanical removal of material particles of the workpiece Cutting strand provided to separate the workpiece into at least two physically separate parts and / or at least partially separate material particles of the workpiece, starting from a surface of the workpiece and / or remove a "guide unit" is here in particular a unit stand, which is intended to exert a constraining force at least along a direction perpendicular to a cutting direction of the cutting strand on the cutting strand to specify a possibility of movement of the cutting strand along the cutting direction. In this context, the term "provided" should be understood to mean in particular specially designed and / or specially equipped.The guide unit preferably has at least one guide element, in particular a guide groove through which the cutting strand is guided The term "cutting plane" should in particular define a plane in which the cutting strand moves along a circumference of the guide unit in at least two mutually oppositely directed cutting directions relative to the guide unit becomes. Preferably, the cutting plane is aligned at least substantially transversely to a machined workpiece surface when machining a workpiece. The term "at least essentially transversal" is to be understood here as meaning, in particular, an alignment of a plane and / or a direction relative to a further plane and / or a further direction, preferably a parallel orientation of the plane and / or the direction relative to the other However, it is also conceivable for the cutting plane to be aligned at least substantially parallel to a machined workpiece surface when machining a workpiece, in particular when the cutting strand is designed as an abrasive, etc., under "at least substantially parallel In particular, an orientation of a direction relative to a reference direction, in particular in a plane, shall be understood, wherein the direction relative to the reference direction has a deviation, in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.

A "cutting direction" is to be understood here as meaning, in particular, a direction along which the cutting strand is used to produce a cutting gap and / or for separating and / or removing material particles of a workpiece to be machined in at least one operating state as a result of a drive force and / or a drive torque, In particular in the guide unit, the cutting strand is preferably moved in an operating state along the cutting direction relative to the guide unit. Preferably, the cutting strand and the guide unit form a closed system. The term "closed system" is intended here to define, in particular, a system which comprises at least two components which are assigned by means of a

Cooperating in a disassembled state of the system from a system superordinate system, such as a machine tool, maintain functionality and / or which are connected captive in the disassembled state. Preferably, the at least two components of the closed system are at least substantially inseparably connected with each other for an operator. By "at least substantially insoluble" should be understood in particular a combination of at least two components that only with the aid of separation tools, such as a saw, in particular a mechanical saw, etc., and / or chemical release agents, such as solvents, etc. , are separable from each other.

The term "segment guide element" is intended here to define, in particular, an element which is intended to guide at least the segment as a result of direct contact with a segment of the cutting strand, in particular with a cutting carrier element of the cutting strand and at least one movement of the segment as a result of the direct Contemplated with the segment, in particular in a freely cut state of the cutting strand of further segments of the cutting strand, in the cutting plane at least to limit the direction away from the guide unit.The segment guide element is particularly preferably in one piece with the guide unit, in particular with an outer wall of the guide unit Preferably, the power-tool parting device has at least one further segment guide element The segment guide elements are preferably arranged in each case in a subregion of the guide unit, wherein the subregions in d he cutting plane opposite or at least substantially parallel to the cutting plane. Particularly preferably, the segment guide element is designed as an extension, which is arranged on the guide unit, in particular on an outer wall of the guide unit. By means of the embodiment according to the invention of the power-tool parting device, slipping-out of cutting-carrier elements of the cutting strand and thus of the cutting strand from the guide unit can be advantageous at least in partial regions of the cutting unit

Guide unit can be prevented. Thus, advantageously, a reliable Machine tool separating device can be achieved, in which the cutting strand is securely guided in the guide unit, in particular in a portion of the guide unit in which the segment guide element is arranged. Furthermore, it is proposed that the guide unit, viewed in the cutting plane, has a self-contained outer contour, which has at least two straight lines extending at least substantially parallel to one another and at least two circular arcs connecting the straight lines. Preferably, the circular arcs are formed by two convex ends of the guide unit. Under a "convex end" is here in particular a geometric

Shape of at least one region of the guide unit to be understood, wherein the area is formed curved starting from the guide unit to the outside. The circular arcs of the guide unit formed by convex ends are arranged on two sides of the guide unit facing away from one another along a main extension direction of the guide unit. A "main extension direction" is to be understood here as meaning, in particular, a direction along which the guide unit, in particular together with the mounted cutting strand, has a maximum extension extending

Straight lines of the outer contour of the guide unit can advantageously be produced a cutting gap which, when the cutting strand and the guide unit are immersed perpendicular to a surface of a workpiece to be machined, from a time of immersion of the parallel running straight of the outer contour of the guide unit in the workpiece, one in which

Viewing cutting plane perpendicular to the parallel straight lines, at least substantially constant dimension.

Advantageously, the segment guide element is arranged at least in the region of one of the at least two straight lines of the outer contour on the guide unit. At least one segment guide element is preferably arranged on each of the two straight lines of the outer contour. Particularly preferably, the cutting strand, in particular blade carrier elements of the cutting strand, in a region of the circular arcs of the outer contour, viewed in the cutting plane, move in the guide groove of the guide unit in a direction facing away from the guide unit, in particular in one of further Cutting support elements of the cutting strand freely cut state of the cutting strand considered. Thus, the circular arcs are particularly preferably decoupled from the segment guide element formed. Advantageously, a high level of safety can be achieved against pulling out of the cutting strand in the region of the straight lines of the outer contour of the guide unit during operation of the machine tool separating device.

It is also proposed that, starting from a first outer surface of the guide unit extending parallel to the cutting plane, in particular the outer surface of an outer wall of the guide unit, the segment guide element extends in the direction of a further outer surface of the guide unit extending parallel to the first outer surface. In particular, starting from the first outer surface, the segment guide element extends along a direction extending at least substantially perpendicular to the cutting plane in the direction of the further outer surface. The term "substantially perpendicular" is intended here to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, in particular in one plane, including an angle of 90 ° and the angle a maximum deviation of, in particular, less than 8 Advantageously, the machine tool separating device has at least one further segment guide element, which, viewed along a direction perpendicular to the cutting plane, faces the outer surface of the first surface parallel to the cutting plane Guide unit in the direction of the further parallel to the first outer surface extending outer surface of the

Guide unit extending segment guide element is arranged on the guide unit. By means of the inventive design of the machine tool separating device, a segment guide element can be achieved structurally simple, which is intended to advantageously limit a movement of the cutting strand in a direction away from the guide unit and extending in the cutting plane perpendicular to the main extension direction.

Furthermore, it is proposed that the segment guide element is designed as an extension, which is arranged on at least one inner wall of the guide unit. Under an "inner wall of the leadership unit" should here in particular a surface of the guide unit are understood, which faces the cutting strand in a arranged in the guide unit state of the cutting strand. In this case, the inner wall and the cutting strand preferably touch each other at least temporarily during a movement of the cutting strand relative to the guide unit. Thus, the inner wall is preferably provided as a guide surface for the cutting strand. Preferably, the segment guide element is at least partially formed by the inner wall of the guide unit. Preferably, the segment guide element is formed by means of a stamping process on the guide unit. However, it is also conceivable that the segment guide element is formed on the guide unit by means of another method that appears appropriate to a person skilled in the art. In addition, it is conceivable for the segment guide element to have another configuration which appears expedient to a person skilled in the art, for example a configuration as a rib, a groove, etc. By means of the embodiment according to the invention, it is advantageously possible to achieve reliable guidance of the cutting strand in the guide unit.

Particularly preferably, the segment guide element extends at least substantially parallel to a main extension direction of the guide unit. The main extension direction preferably extends from a circular arc of the outer contour of the guide unit to a further circular arc of the outer contour. Thus, the segment guide element preferably extends at least in partial regions at least substantially parallel to the two straight lines of the outer contour of the guide unit. Preferably, the guide unit comprises at least two segment guide elements which extend at least in partial areas at least substantially parallel to the at least two straight lines of the outer contour of the guide unit. Thus, in particular in areas in which the circular arcs of the outer contour are arranged, the guide unit is decoupled from the segment guide elements. However, it is also conceivable that the guide unit has a segment guide element which extends at least substantially parallel to an entire circumference of the outer contour on the inner wall of the guide unit. By means of the configuration according to the invention, advantageously, a simple assembly of the cutting strand can be achieved by an insertion, in particular in an unclosed state of the cutting strand, in the region of the circular arcs of the outer contour. In addition, it is proposed that the cutting strand at least one

Having a blade support member having at least one corresponding with the segment guide element of the guide unit Segmentgegenführungsele- element. The cutting strand preferably has a multiplicity

Cutter carrier elements. A person skilled in the art will, in particular depending on the application, have a suitable number for the cutting strand

Select cutter carrier elements. Particularly preferably, each cutter carrier element of the cutting strand of the power-tool separating device has at least one segment counter-guide element which is provided to at least one at least substantially parallel to a movement of the cutter carrier element in a state arranged in a guide unit in a direction away from the guide unit Limit a direction of a cutting plane of the cutting strand, in particular by means of an interaction with the at least one segment guide element of the guide unit. Thus, structurally simple guidance can be achieved along a direction of the cutting strand running at least substantially parallel to a cutting plane of the cutting strand.

Advantageously, the segment counter-guide element is formed as a transverse extension of the at least one cutter support element which extends at least substantially perpendicular to a cutting plane of the cutting strand. Particularly preferably, the transverse extension defines a longitudinal groove into which the segment guide element engages in a state of the cutting strand arranged in the guide unit. However, it is also conceivable that the segment counter-guide element to a movement limitation of

Cutting carrier element engages in a formed as a groove segment guide element of the guide unit. In addition, it is also conceivable that the segment guide element has another, a skilled person appear appropriate design, such as a configuration as a rib, as a groove, etc. By means of the inventive design can be realized structurally simple movement limitation by means of a positive connection.

Preferably, the cutting strand has at least one cutter support element which, at least in one operating state, runs along at least one Considered substantially parallel to the cutting plane and at least substantially perpendicular to one of the at least two straight lines of the outer contour extending direction is arranged with at least a portion of the cutter support member between a portion of a guide element of the guide unit and the segment guide element. The term "between" should in particular define a spatial arrangement of a component along at least one direction between two subregions of another component or between two further components, wherein preferably at least one straight line exists along the direction that the component and the two subregions of the further component or the component and the two further components intersects. <br/> [0015] By means of the embodiment according to the invention, it is advantageously possible to achieve a form-guided guidance of the cutter carrier element of the cutting strand.

In addition, it is proposed that the power-tool parting device at least one torque-transmitting element, which at least partially in the

Guide unit is mounted, includes. Preferably, the torque transmission element is at least partially surrounded along at least one direction by outer walls of the guide unit. Preferably, the torque transmission element has a concentric coupling recess into which a pinion of a drive unit of a portable power tool and / or a

Gear and / or a toothed shaft of a gear unit of the portable power tool can engage in an assembled state / can. The coupling recess is in this case preferably formed by a hexagon socket. However, it is also conceivable for the coupling recess to have another configuration that appears appropriate to a person skilled in the art. In addition, in an alternative embodiment of the power tool separating device is conceivable that the guide unit is decoupled from the torque transmitting element and instead has a recess into which a drive element of a portable machine tool on which the Werkzeugma- schinentrennvorrichtung can be arranged to drive the cutting strand in a coupled State is insertable to cooperate directly with the cutting strand, in particular with cutter support elements of the cutting strand, which comprise a drive surface corresponding to the drive element and / or drive recess. By means of the embodiment according to the invention of the power-tool parting device, a closed system can be achieved in a structurally simple manner, which is conveniently achieved by an operator can be mounted on a dedicated machine tool. It can thus advantageously be dispensed with an individual assembly of components, such as the cutting strand, the guide unit and the torque transmitting element, by the operator for use of the machine tool separating device according to the invention.

Advantageously, the cutting strand has at least one

Cutting carrier element, which has on a torque transmitting element facing side of the cutter support member at least one recess into which engages the torque transmitting element in at least one operating state for driving the cutting strand. Preferably, all cutter support elements of the cutting strand on the torque transmitting element facing sides of the cutter support elements at least one recess into which engages the torque transmitting element in at least one operating state for driving the cutting strand. It can structurally simple forces and / or torques are transmitted to drive the cutting strand to the cutter support element.

Furthermore, it is proposed that the cutter support element is at least substantially circular-arc-shaped, at least on the side facing the torque-transmitting element. The torque transmitting member facing in an assembled state side of the

Cutting carrier element is designed in particular in at least one partial region, viewed between a central axis of a arranged in and / or on the cutter support element connecting element and a central axis of a Verbindungsausneh- tion of the cutter support member for receiving the connecting element, a circular arc. Preferably, the arcuate portion is adjacent to the recess into which the torque transmitting element engages formed. Particularly preferably, the circular-arc-shaped partial region has a radius which corresponds at least essentially to a radius of a deflection contour of the guide unit, in particular a deflection contour of a guide element of the guide unit arranged on a convex end. Preferably, the torque transmitting element in a mounted state facing side of the cutter support element, in particular the subregion, is concave. It can advantageously be a deflection of the cutter carrier element in an operation of the machine tool. nentrennvorrichtung be achieved. Furthermore, advantageously, a small deflection radius can be realized during a deflection of the cutter support element.

Furthermore, the invention is based on a portable power tool with a coupling device for positive and / or non-positive coupling with a machine tool separating device according to the invention. A "portable power tool" is to be understood here in particular as meaning a power tool, in particular a hand tool, which can be transported by an operator so that it can not be transported by a machine The portable power tool in particular has a mass which is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg, the machine tool separating device according to the invention and the portable machine tool according to the invention forming a machine tool system can be advantageously achieved, and a portable machine tool can be advantageously achieved which is particularly advantageous for a wide range of applications.

The machine tool separating device according to the invention and / or the portable power tool according to the invention should not be limited to the application and embodiment described above. In particular, the machine tool separating device according to the invention and / or the portable power tool according to the invention may have a number deviating from a number of individual elements, components and units specified herein for fulfilling a mode of operation described herein.

drawing

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations. Show it:

1 shows a portable power tool according to the invention with a machine tool separating device according to the invention in a schematic representation,

2 is a detailed view of the machine tool separating device according to the invention in a schematic representation,

Fig. 3 is a detail view of cutter support elements of a

Cutting strand of the machine tool separating device according to the invention in a schematic representation,

4 shows a further detailed view of one of the cutter carrier elements of the cutting strand of the machine tool separating device according to the invention in a schematic representation,

5 shows a sectional view of the machine tool separating device according to the invention from FIG. 2 along the line V-V in a schematic illustration,

6 is a detailed view of an alternative machine tool separating device according to the invention in a schematic representation,

7 is a sectional view of a guide unit and a

Cutting support element of a cutting strand of the alternative inventive machine tool separating device of Figure 6 along the line VII-VII in a schematic representation and

Fig. 8 is a detail view of the arranged in the guide unit

Cutting carrier element in a schematic representation.

Description of the embodiments

FIG. 1 shows a portable machine tool 56a with a machine tool separating device 10a, which together form a machine tool system. The portable power tool 56a has a coupling device 58a for the positive and / or non-positive coupling with the machine tool separating device 10a. In this case, the coupling device 58a can be embodied as a bayonet closure and / or as another coupling device that appears meaningful to a person skilled in the art. Further, the portable power tool 56a has a machine tool housing 60a enclosing a drive unit 62a and a gear unit 64a of the portable power tool 56a. The drive unit 62a and the gear unit 64a are operatively connected together in a manner already known to a person skilled in the art in order to generate a drive torque which can be transmitted to the power-tool parting device 10a. The gear unit 64a is formed as an angle gear. The drive unit 62a is designed as an electric motor unit. However, it is also conceivable for the drive unit 62a and / or the gear unit 64a to have another configuration that appears appropriate to a person skilled in the art. The drive unit 62a is provided to drive a cutting strand 12a of the power-tool parting device 10a in at least one operating state with a cutting speed of less than 6 m / s. In this case, the portable power tool 56a has at least one operating mode in which a drive of the cutting strand 12a in a guide unit 14a of the power-tool parting device 10a along a cutting direction 66a of the cutting strand 12a with a cutting speed less than 6 m / s is made possible.

FIG. 2 shows the power-tool parting device 10a in a state decoupled from the coupling device 58a of the portable power tool 56a. The machine tool separating device 10a has the cutting strand 12a and the guide unit 14a, which together form a closed system. The guide unit 14a is formed as a sword. Here, the guide unit 14a, viewed in a cutting plane, a self-contained outer contour, the two mutually at least substantially parallel lines 28a, 30a and two lines 28a, 30a interconnecting circular arcs 32a, 34a. The circular arcs 32a, 34a are formed by two convexly shaped ends 68a, 70a of the guide unit 14a. The convexly shaped ends 68a, 70a of the guide unit 14a, viewed along a main extension direction 72a of the guide unit 14a, are arranged on two opposite sides of the guide unit 14a. Of the Cutting strand 12a is guided by means of the guide unit 14a. For this purpose, the guide unit 14a at least one guide element 44a (Figure 5), by means of which the cutting strand 12a is guided. The guide element 44a is in this case formed as a guide groove 76a, which extends in the cutting plane of the cutting strand 12a along an entire circumference of the guide unit 14a. Here, the cutting strand 12a is guided by means of the guide groove 76a bounding edge regions of the guide unit 14a. However, it is also conceivable that the guide element 44a is formed in another manner that appears appropriate to a person skilled in the art, such as, for example, rib-like molding on the guide unit 14a, which engages in a recess on the cutting strand 12a. The cutting strand 12a, viewed in a plane perpendicular to the cutting plane, is surrounded on three sides by the edge regions delimiting the guide groove 76a (FIG. 5). The cutting strand 12a is circumferentially moved in the guide groove 76a relative to the guide unit 14a during operation.

Furthermore, the guide unit 14a has four segment guide elements 16a, 18a, 20a, 22a for guiding the cutting strand 12a, two of the four segment guide elements 16a, 18a, 20a, 22a being provided for movement of the cutting strand 12a in one of the guide unit 14a facing away, along each one at least substantially parallel to the cutting plane of the cutting strand 12a extending direction 24a, 26a to limit (Figure 5). The directions 24a, 26a along each of the two of the four segment guide elements 16a, 18a, 20a, 22a limit movement of the cutting strand 12a in a direction away from the guide unit 14a, in each case run at least substantially perpendicular to the straight lines 28a, 30a of the outer contour of Guide unit 14a. In this case, in each case two of the four segment guide elements 16a, 18a, 20a, 22a are arranged in a region of one of the two straight lines 28a, 30a of the outer contour on the guide unit 14a. Thus, two of the four segment guide members 16a, 18a, 20a, 22a are disposed in a portion of the guide unit 14a in which the cutting string 12a is in an operative state of rotating the cutting strand 12a in the cutting direction 66a along the circumference of the guide unit 14a along the main extension direction 72a is moved in a direction away from the portable power tool 56a direction. Furthermore, two of the four segment guide elements 16a, 18a, 20a, 22a are in one Part of the guide unit 14a arranged in which the cutting strand 12a is moved in an operating state with a circumferential movement of the cutting strand 12a in the cutting direction 66a along the circumference of the guide unit 14a, along the main direction of extension 72a, in a direction of the portable power tool 56a facing direction. The four segment guide elements 16a, 18a, 20a, 22a are provided to hold the cutting strand 12a in regions of the straight lines 28a, 30a of the outer contour in the guide groove 76a. The four segment guide elements 6a, 18a, 20a, 22a are integral with the

Guide unit 14a formed. Two of the four segment guide members 16a, 18a, 20a, 22a are integrally formed with one of two outer walls 80a, 82a of the guide unit 14a, respectively. The segment guide elements 16a, 18a, 20a, 22a, viewed along the directions perpendicular to the straight lines 28a, 30a of the outer contour extending directions 24a, 26a, each disposed on opposite sides of the outer walls 80a, 82a. However, it is also conceivable that the four segment guide elements 16a, 18a, 20a, 22a are formed separately from the guide unit 14a and the like, for example by means of a latching connection. detachably formed with the guide unit 14a connectable. Two of the four segment guide elements 16a, 18a, 20a, 22a integral with one of

Outer walls 80a, 82a are each extending from a first parallel to the cutting plane extending outer surface 36a of the guide unit 14a in the direction of another parallel to the first outer surface 36a extending outer surface 38a of the guide unit 14a. The two further ones of the four segment guide elements 16a, 18a, 20a, 22a extend in this case from the further outer surface 38a in the direction of the first outer surface 36a. The outer surfaces 36a, 38a are in this case formed by the outer walls 80a, 82a of the guide unit 14a. Thus, the four segment guide elements 16a, 18a, 20a, 22a are formed as extensions, which are formed integrally with the outer walls 80a, 82a. Furthermore, the four extend

Segment guide elements 16a, 18a, 20a, 22a respectively, along the main extension direction 72a of the guide unit 14a, along an entire extension of the respective straight line 28a, 30a of the outer contour, to the circular arcs formed by the convex ends 68a, 70a 32a, 34a. Furthermore, the power-tool parting device 10a has a torque transmission element 46a at least partially supported by the guide unit 14a for driving the cutting strand 12a. The torque transmission element 46a is in a coupled state for driving the cutting strand 12a with a pinion (not shown in detail here) of the drive unit 62a and / or a gear (not shown in detail here) and / or a toothed shaft (not shown here) coupled to the transmission unit 64a. In this case, the torque transmission element 46a has a coupling recess 78a, which in a mounted state can be coupled to a drive element of the portable machine tool 56a. The coupling recess 78a is concentrically disposed in the torque transmitting member 46a. Furthermore, the coupling recess 78a is provided, in a coupled state of the torque transmission element 46a and / or the machine tool separating device 10a with the pinion (not shown here) of the drive unit 62a and / or the gear (not shown here) and / or the toothed shaft (not shown here) of the gear unit 64a to be coupled. The coupling recess 78a is formed as a hexagon socket. However, it is also conceivable for the coupling recess 78a to have another configuration that appears appropriate to a person skilled in the art.

The cutting strand 12a includes a plurality of interconnected ones

Cutter carrier elements 40a, 42a, which are each interconnected by means of a connecting element 84a, 86a of the cutting strand 12a, which is at least substantially flush with one of two outer surfaces 88a, 90a of one of the interconnected cutter support elements 40a, 42a (Figures 3 and 5). The outer surfaces 88a, 90a extend in a state arranged in the guide groove 76a of the cutting strand 12a at least substantially parallel to the cutting plane. Depending on the application, a person skilled in the art will select a suitable number of cutter carrier elements 40a, 42a for the cutting strand 12a. The cutter support elements 40a, 42a are each formed integrally with one of the connecting elements 84a, 86a. Here, the connecting elements 84a, 86a are bolt-shaped. Furthermore, the cutter support elements 40a, 42a each have a connecting recess 92a, 94a for receiving one of the connecting elements 84a, 86a of the cutter support elements 40a, 42a connected to one another. The connecting elements 84a, 86a are guided by means of the guide unit 14a (FIG. 5). in this connection For example, in an assembled state of the cutting strand 12a, the connection elements 84a, 86a are arranged in the guide groove 76a. The connecting elements 84a, 86a can, viewed in a plane perpendicular to the cutting plane, bear against two side walls 96a, 98a of the guide groove 76a. The side walls 96a, 98a of the guide groove 76a extend in the

Viewing cutting plane, starting from the guide unit 14a perpendicular to the cutting direction 66a of the cutting strand 12a to the outside.

Furthermore, the cutter carrier elements 40a, 42a are in an operating state in regions of the guide unit 14a, in each of which two of the four segment guide elements 16a, 18a, 20a, 22a are arranged on the guide unit 14a, along one at least substantially parallel to the cutting plane and at least substantially perpendicular to one of the two straight lines 28a, 30a of the outer contour extending direction, each with a portion of the cutter support members 40a, 42a between a formed as a guide groove 76a guide member 44a defining edge portion 74a of the guide unit 14a and one of the four segment guide elements 16a, 18a, 20a, 22a arranged. Thus, in an operating state in regions of the guide unit 14a in which the segment guide elements 16a, 18a, 20a, 22a are arranged on the guide unit 14a, the cutter carrier elements 40a, 42a are at least substantially in the subregion of the cutter carrier elements 40a, 42a parallel to the cutting plane and at least substantially perpendicular to one of the two straight lines 28a, 30a of the outer contour extending direction of the guide groove 76a bounding edge region of the guide unit 14a and one of the four segment guide elements 16a,

18a, 20a, 22a surrounded. Overall, the blade carrier elements 40a, 42a in an operating state in regions of the guide unit 14a, in which the segment guide elements 16a, 18a, 20a, 22a are arranged on the guide unit 14a, respectively in two mutually different subregions along the at least substantially parallel to the cutting plane and at least in the

Substantially perpendicular to one of the two straight lines 28a, 30a of the outer contour extending direction of the guide groove 76a bounding edge region of the guide unit 14a and one of the four segment guide elements 16a, 18a, 20a, 22a surrounded. The cutter support elements 40a, 42a are by means of the four segment guide elements 16a, 18a, 20a, 22a in areas of

Straight lines 28a, 30a of the outer contour held in the guide groove 76a. Furthermore, the cutter support elements 40a, 42a of the cutting strand 12a each have a recess 52a, 54a, which is in each case arranged in an assembled state on a torque transmitting element 46a facing side 48a, 50a of the respective cutter support member 40a, 42a. The

Torque transmission element 46a engages in the recesses 52a, 54a in at least one operating state for driving the cutting strand 12a. The torque transmission element 46a is formed here as a gear. Thus, the torque transmission element 46a includes teeth (not shown here in detail) which are intended to be in at least one operating state for

Driving the cutting strand 12a into the recesses 52a, 54a of the

Cutter support elements 40a, 42a engage. Further, the torque transmitting member 46 a facing sides 48 a, 50 a of

Cutting carrier elements 40a, 42a circular arc-shaped. The torque-transmitting element 46a facing in an assembled state sides 48a, 50a of the cutter support members 40a, 42a are respectively in portions 100a, 102a, 104a, 106a, between a central axis 108a of the respective connecting element 84a, 86a and a central axis 110a, 112a of the respective connecting recess 92a , 94a viewed, circular arc configured. The arcuate portions 100a, 102a, 104a, 106a are respectively formed adjacent to the recesses 52a, 54a engaged by the torque transmitting member 46a. In this case, the circular-arc-shaped partial regions 100a, 102a, 104a, 106a have a radius which corresponds to a radius of a profile of the guide groove 76a at the convex ends 68a, 70a. The partial regions 100a, 102a, 104a, 106a are concave (FIGS. 3 and 4).

Furthermore, the cutting strand 12a has cutting elements 114a, 116a. The cutting elements 114a, 116a are each integral with one of

Cutter support elements 40a, 42a formed. A number of the cutting elements 114a, 116a depend on a number of cutter support elements

40a, 42a. A person skilled in the art will select a suitable number of cutting elements 114a, 116a depending on the number of cutter carrier elements 40a, 42a. The cutting elements 114a, 116a are provided to allow a separation and / or removal of material particles of a workpiece to be machined (not shown here). The cutting elements 114a, 116a can be used, for example, as a solid chisel, semi-chisel or others, to a person skilled in the art as meaningful. be made fully appearing cutting types, which are intended to allow a separation and / or removal of material particles of a workpiece to be machined. The cutting strand 12a is endless. Thus, the cutting strand 12a is formed as a cutting chain. The

In this case, cutter carrier elements 40a, 42a are designed as chain links, which are connected to one another by means of the bolt-shaped connecting elements 84a, 86a. However, it is also conceivable that the cutting strand 12a, the

Cutting edge support elements 40a, 42a and / or the connecting elements 84a, 86a are configured in another, to a person skilled in the sense appearing manner.

FIGS. 6 to 8 show an alternative embodiment. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the exemplary embodiments, the letters a and b are added to the reference numerals of the exemplary embodiments. The following description is essentially limited to the differences from the first exemplary embodiment in FIGS. 1 to 5, wherein reference can be made to the description of the first exemplary embodiment in FIGS. 1 to 5 with regard to components, features and functions remaining the same.

FIG. 6 shows an alternative power-tool parting device 10b in a state decoupled from a coupling device of the portable power tool (not shown here). The machine tool separating device 10b has a cutting strand 12b and a guide unit 14b, which together form a closed system. The guide unit 14b is designed as a sword. Here, the guide unit 14b, viewed in a cutting plane, a self-contained outer contour, which is at least substantially formed as Lamesches oval. Thus, the outer contour comprises at least two elongate sides, which are connected to one another by means of two circular arcs 32b, 34b. In this case, the elongated sides, starting from the guide unit 14b, are convex in a direction away from the guide unit 14b. The circular arcs 32b, 34b are formed by two convexly shaped ends 68b, 70b of the guide unit 14b. The convexed ends 68b, 70b of the guide unit 14b are along one

Main extension direction 72b of the guide unit 14b, at two arranged on opposite sides of the guide unit 14b. The cutting strand 12b is guided by means of the guide unit 14b. The guide unit 14b in this case has at least one segment guide element 6b for guiding the cutting strand 12b, which is provided for movement of the cutting strand 12b, viewed in a direction away from the guide unit 14b at least along at least substantially parallel to a cutting plane of the Cutting strand 12b extending direction 24b, 26b to limit. The segment guide element 16b extends, starting from a first outer surface 36b of the guide unit 14b running parallel to the cutting plane, in the direction of a further parallel offset from the first outer surface

36b extending outer surface 38b of the guide unit 14b (Figure 7). Here, a portion of the outer surface 36b is bent in the direction of the further outer surface 38b. Thus, the segment guide member 16b extends into a guide groove 76b of the guide unit 14b. The segment guide element 16b is formed as an extension, which is arranged on at least one inner wall of the guide unit 14b. The inner wall of the guide unit 14b limits in this case the guide groove 76b of the guide unit 14b, by means of which the cutting strand 12b is guided. Thus, the inner wall of the guide unit 14b forms at least one side wall 96b of the guide groove 76b.

Overall, the guide unit 4b has at least two segment guide elements 16b, 22b. In this case, the segment guide elements 16b, 22b extend, starting from the first outer surface 36b of the guide unit 14b running parallel to the cutting plane, in the direction of the further outer surface 38b of the guide unit extending parallel to the first outer surface 36b

14b. In this case, however, it is also conceivable that the power-tool parting device 10b also has at least one or two segment guide elements on the further outer surface 38b, which are intended to observe a movement of the cutting strand 12b in a direction away from the guide unit 14b, at least along a direction at least substantially parallel to a cutting plane of the cutting strand 12b extending direction 24b, 26b to limit. The segment guide elements 16b, 22b are introduced into the first outer surface 36b by means of a stamping process. However, it is also conceivable for the segment guide elements 16b, 22b to be connected to the guide by means of another method that appears appropriate to a person skilled in the art. tion unit 14b are introduced, such as by means of a forming process, which is intended to form by means of a punch and a die rib-like segment guide elements to the guide unit 14b. Further, the segment guide members 16b, 22b are partially disposed on the inner wall of the guide unit 14b. Thus, each of the segment guide elements 16b, 22b includes web-like segment guide portions (not shown here). In addition, it is conceivable that the guide unit 14b additionally or alternatively has a plurality of segment guide elements arranged spaced apart from one another along a longitudinal direction of the guide unit 14b on the inner wall.

Furthermore, the cutting strand 12b at least one

Blade support member 40b, which includes at least one segment counter-guide element 124b, which is intended to a movement of the

Cutting edge member 40b, seen in a arranged in the guide unit 14b of the machine tool separating device 10b viewed in a direction away from the guide unit 14b direction, at least along the at least substantially parallel to the cutting plane of the cutting strand 12b extending direction 24b, 26b to limit. The segment counter-guide element 24b is formed by a transverse extension, which extends at least substantially perpendicular to the cutting plane of the cutting strand 12b. Here, the segment counter-guide member 124b defines a longitudinal groove. The segment counter-guide element 124b is provided to cooperate with a movement limitation with the segment guide elements 16b, 22b which are arranged on the guide unit 14b and which are formed corresponding to the segment counter-guide element 124b. However, it is also conceivable for the segment counter-guide element 124b to have another configuration that appears appropriate to a person skilled in the art, such as a design as a rib, etc., which cooperates with a groove arranged on the guide unit 14b to limit the movement. Overall, the cutting strand 12b has a plurality of cutter support elements 40b, 42b. each

Cutting support element 40b, 42b of the cutting strand 12b in this case comprises at least one segment counter-guide element 124b, which is provided for movement of the cutter support elements 40b, 42b in a state arranged in the guide unit 14b of the power-tool parting device 10b Viewed away from the guide unit 14b direction, at least along at least substantially parallel to the cutting plane of the

Cutting strand 12b extending direction 24b, 26b to limit.

In addition, each of the cutter support elements 40b, 42b has a compressive force transfer surface 128b (FIGS. 7 and 8). The pressure force transmission surface 128b is provided to support pressure forces which act on the cutting strand 12b during machining of a workpiece (not shown here in detail) by means of cooperation with a pressure force receiving region 130b of the guide unit 14b. The pressure-force receiving region 130b of the guide unit 14b is arranged between the outer surface 36b and the further outer surface 38b of the guide unit 14b when viewed along a direction extending at least substantially perpendicular to the cutting plane of the cutting strand 12b.

The cutter support member 40b of the cutting string 12c further includes a drive surface 126b which is adapted to cooperate with drive surfaces of a cutting member 12b having drive surfaces of a torque transmitting member 46b of the power tool separating apparatus 10b. The drive surfaces of the torque transmission element 46b are formed here as tooth flanks. The drive surface 126b of the cutter support member 40b is thus formed corresponding to the drive surfaces of the torque transmitting member 46b. When the cutting strand 12b is driven, the tooth flanks of the torque transmission element 46b temporarily bear against the drive surface 126b in order to transmit drive forces.

The cutter support elements 40b, 42b of the cutting strand 12b are interconnected by means of at least one connecting element 84b of the cutting strand 12b, which is at least substantially flush with at least one outer surface 88b, 90b of one of the cutter support elements 40b, 42b (Figure 8). However, it is also conceivable that the connecting element 84b projects beyond at least one of the outer surfaces 88b, 90b along a direction extending at least substantially perpendicular to the cutting plane. The connecting element 84b, when viewed along a transverse axis of the connecting element 84b, is flush with both outer surfaces 88b, 90b of one of the Cutter support elements 40b, 42b. The transverse axis of the connecting element 84b extends in a coupled state of the

Cutting carrier elements 40b, 42b at least substantially perpendicular to the cutting plane of the cutting strand 12b. The connecting element 84b is formed integrally with one of the cutter support elements 40b, 42b. Here, the connecting element 84b as a longitudinal extension of the one

Cutting carrier elements 40b, 42b formed. The connecting element 84b designed as a longitudinal extension extends at least substantially along a longitudinal extension of the cutter carrier element 40b, with which the connecting element 84b is integrally formed. The connecting element 84b designed as a longitudinal extension thus extends at least substantially parallel to the cutting plane of the cutting strand 12b. Here, the longitudinal extension is hook-shaped. In this case, the longitudinal extension is deviating from a rod-shaped extension, to which a circular positive-locking element is formed and / or deviating from a semicircular extension. Each cutter carrier element 40b, 42b of the cutting strand 12b of the machine tool separating device 10b has in each case a connecting element 84b designed as a longitudinal extension (here only a cutter carrier element 40b with a connecting element 84b in FIG. 8 for illustrative purposes) and in each case a connecting recess 92b formed correspondingly to the connecting element 84b , The individual connecting elements 84b of the cutter support elements 40b, 42b are respectively provided for forming the cutting strand 12b designed as a cutting chain to realize a positive connection between the cutter support elements 40b, 42b by means of cooperation with a connecting recess 92b, by means of which the cutter support elements 40b, 42b are pivotable with each other are connected.

Furthermore, the connecting element 84b designed as a longitudinal extension has a transverse securing region 118b on one side. The transverse securing region 118b is provided, by means of cooperation with at least one transverse securing element of a cutter carrier element 40b of the cutter carrier elements 40b, 42b, to move the cutter carrier elements 40b, 42b along at least two oppositely directed directions in a coupled state relative to one another at least to prevent as far as possible. Here is the Transverse region 118b formed as a rib. However, it is also conceivable that the transverse securing region 118b has another configuration which appears expedient to a person skilled in the art, such as a configuration as a groove, etc. The transverse securing region 118b faces on a cutting element 114b formed integrally with the cutter carrier element 40b

Side of the connecting element 84b arranged.

Furthermore, the cutter support elements 40b, 42b each have two transverse securing elements 120b, 122b, which are provided to cooperate in a coupled state of the cutter carrier elements 40b, 42b each with a transverse securing area. The transverse securing elements 120b, 122b are each arranged in an edge region of the respective cutter carrier element 40b, 42b delimiting the connecting recess 92b. Here, the transverse securing elements 120b, 122b are integral with the

Cutter support elements 40b, 42b formed. The cross-securing elements

120b, 122b are each integrally formed by means of an embossing process to the respective cutter support member 40b, 42b. Thus, the transverse securing elements 120b, 122b, viewed along a direction extending at least substantially perpendicular to the cutting plane of the cutting strand 12b, extend maximally as far as the outer surfaces 88b, 90b of the cutter carrier elements

40b, 42b. However, it is also conceivable for the transverse securing elements 120b, 122b to be integrally formed on the respective cutter carrier element 40b, 42b by means of another method that appears appropriate to a person skilled in the art, for example by means of a welding method, by means of an adhesive method, by means of a stamping method a bending process, etc.

In addition, the two transverse securing elements 120b, 122b arranged on each of the cutter carrier elements 40b, 42b, viewed along a direction at least substantially perpendicular to the cutting plane of the cutting strand 12b, are on opposite sides of the cutter carrier elements

40b, 42b arranged. Furthermore, the two transverse securing elements 120b, 122b arranged on each of the cutter carrier elements 40b, 42b are arranged offset relative to one another on the respective cutter carrier element 40b, 42b. Thus, the transverse securing elements 120b, 122b, with respect to the cutting plane of the cutting strand 12b, differing from a mirror-symmetrical metric arrangement of the cutter support elements 40b, 42b arranged. Here, the transverse securing elements 120b, 122b are formed as partial extensions on an edge region of the connecting recess 92b. However, it is also conceivable for the transverse securing elements 120b, 122b to have another configuration and / or arrangement which appears expedient to a person skilled in the art, such as, for example, a design as parallel webs which has a groove-shaped recess in the edge region of the respective connecting recess 92b, viewed along a at least substantially perpendicular to the cutting plane of the cutting strand 12b extending direction limit.

Claims

claims

Machine tool separating device, in particular a handheld power tool separating device, having at least one cutting strand (12a, 12b) and at least one guide unit (14a, 14b), characterized in that the guide unit (14a, 14b) comprises at least one segment guide element (16a, 18a, 20a, 22a; 16b, 22b) for guiding the cutting strand (12a, 12b), which is provided for, a movement of the cutting strand (12a, 12b) viewed in a direction away from the guide unit (14a, 14b) direction, at least along at least substantially to limit parallel to a cutting plane of the cutting strand (12a, 12b) extending direction (24a, 26a, 24b, 26b).

Machine tool separating device according to claim 1, characterized in that the guide unit (14a), viewed in the cutting plane, has a self-contained outer contour which has at least two straight lines (28a, 30a) extending at least substantially parallel to one another and at least two the straight lines (28a, 30a) interconnecting circular arcs (32a, 34a).

Machine tool separating device according to claim 2, characterized in that the segment guide element (16a, 18a, 20a, 22a) is arranged at least in the region of one of the at least two straight lines (28a, 30a) of the outer contour on the guide unit (14a).

4. Machine tool separating device according to one of the preceding claims, characterized in that the segment guide element (16a, 18a, 20a, 22a; 16b, 22b), starting from a first parallel to the cutting plane extending outer surface (36a, 36b) of the guide unit (14a, 14b) in the direction of a further parallel to the first outer surface (36a, 36b) extending outer surface (38a, 38b) of the guide unit (14a, 14b) extends.

5. Machine tool separating device according to one of the preceding claims, characterized in that the segment guide element (16b, 22b) is formed as an extension, which is arranged on at least one inner wall of the guide unit (14b).

6. Machine tool separating device according to claim 5, characterized in that the segment guide element (16b, 22b) extends at least substantially parallel to a main extension direction (72b) of the guide unit (14b).

7. Machine tool separating device according to one of the preceding claims, characterized in that the cutting strand (12b) has at least one cutter support element (40b, 42b) having at least one with the segment guide element (16b, 22b) of the guide unit (14b) corresponding segment counter-guide element (124b) ,

8. Machine tool separating device according to claim 7, characterized in that the segment counter-guide element (124b) is formed as a transverse extension of the at least one cutter carrier element (40b, 42b) which extends at least substantially perpendicular to a cutting plane of the cutting strand (12b).

9. Machine tool separating device at least according to claim 2, characterized in that the cutting strand (12a) at least one

Cutting carrier element (40a, 42a), at least in one operating state, along at least one substantially parallel to

Cutting plane and at least substantially perpendicular to one of the at least two straight lines (28a, 30a) of the outer contour extending direction, with at least a portion of the cutter support member (40a, 42a) between an edge region (74a) of a guide member (44a) of the guide unit (14a) and the segment guide member (16a, 18a, 20a, 22a).

10. Machine tool separating device according to one of the preceding claims, characterized by at least one torque transmission element (46a, 46b) which is at least partially mounted in the guide unit (14a, 14b).

1 1. A machine tool separating device according to claim 10, characterized in that the cutting strand (12 a) at least one

Has cutter support element (40a, 42a), which on one of the torque transmitting element (46a) facing side (48a, 50a) of the

Cutting carrier element (40a, 42a) at least one recess (52a, 54a), in which engages the torque transmitting element (46a) in at least one operating state for driving the cutting strand (12a).

12. Machine tool separating device according to claim 11, characterized in that the cutter support element (40a, 42a) at least on the torque transmitting element (46a) facing side (48a, 50a) is at least substantially circular arc-shaped. 3. Portable machine tool with a coupling device (58 a) for the positive and / or non-positive coupling with a machine tool separating device according to one of the preceding claims.

14. A machine tool system with a portable machine tool according to claim 13 and with at least one machine tool separating device according to one of claims 1 to 12.