EP2780139B1 - Device for limiting the depth of a cut - Google Patents

Description

State of the art

There are already known Schnitttiefenbegrenzungsvorrichtungen for portable power tools, comprising a cutting depth guide unit and a stop unit, which has a stop element, which has a possibility of movement relative to the Schnitttiefenführungseinheit along a cutting depth guide path of the cutting depth guide unit to limit a depth of cut.

EP 1 777 047 A1 discloses a covering device, for a tool device for driving a circular-disk-shaped tool, with a hood body, from which the tool can be enclosed, a guide body which can be applied to a workpiece to be machined, which is mounted pivotably on the hood body and thereby by a spring force in a first pivoting direction S1 of is biased this way, and an adjustable depth stop, via which the guide body in a first pivoting direction S1 opposite second pivot direction S2 can be applied to the hood body, wherein a fixing device is provided, via which the guide body also in the direction of the first pivoting direction S1 opposite the hood body adjustable adjustable.

Disclosure of the invention

The invention is based on a cutting depth limiting device. for portable machine tools, with a machine tool housing, with at least one cutting depth guide unit and with at least one stop unit which has at least one stop element which abuts a limit of a depth of cut on a stop region of the machine tool housing and a movement possibility relative to the Schnitttiefenführungseinheit along a cutting depth guide track of

Cutting depth guide unit has. A deratige device is for example from the EP 1 777 047 A1 out. The invention provides a cutting depth limiting device according to the patent claim 1.

It is proposed that the cutting depth guide unit has at least one cutting depth guide element mounted movably relative to a guide rail element of the cutting depth guide unit, on which the stop element is movably mounted relative to the cutting depth guide element, wherein at least one stop moving unit is provided, at least in one operating state, a further movement possibility of the stop element relative to Cutting depth guide unit to allow a movement axis. The term "cutting depth limiting device" is intended to define in particular a device which is intended to delimiting an immersion path of a machining tool, in particular a circular saw blade, connected to a tool holder of a portable machine tool into a workpiece to be machined and / or to set a length of the insertion section, in particular by means of the stop unit. By "intended" is intended to be understood in particular specifically designed and / or specially equipped. In this case, the immersion path of the machining tool into a workpiece to be machined is considered, in particular, along a direction running at least substantially perpendicular to a contact surface of a supporting unit of the portable machine tool with which the portable machine tool rests on a workpiece surface of a workpiece to be machined. 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 less than 5 ° and particularly advantageously less than 2 °.

Preferably, a movement path of the tool holder in the direction of the support unit relative to the support unit is limited by means of the stop unit and / or set a length of the movement path of the tool holder in the direction of the support unit relative to the support unit. Preferably, by means of adjusting a position of the stop element relative to the cutting depth guide unit, a length of the movement path of the tool holder in the direction of the support unit can be adjusted relative to the support unit. Preferably, by means of setting a length of the movement path of the tool holder, in particular with a machining tool attached thereto, a cutting depth of a machining tool penetrating into a workpiece surface during machining of a workpiece relative to the support unit can be set. A "support unit" is to be understood here as meaning, in particular, a unit which rests on the workpiece during machining of a workpiece by means of the portable machine tool with proper handling of the portable machine tool, in particular with a bearing surface of the support unit and which is intended to be portable Machine tool during machining of the workpiece on support the workpiece. Particularly preferably, the support unit is designed as a sliding block and / or as a base plate.

The term "movably mounted" is to be understood here in particular as a mounting of the stop element on the cutting depth guide unit, wherein the stop element, in particular decoupled from an elastic deformation of the stop element, a movement possibility relative to the Schnitttiefenführungseinheit along at least one axis along a distance greater than 1 mm, preferably greater than 10 mm and more preferably greater than 20 mm. However, it is also conceivable that the stop element alternatively or additionally another, a skilled person seems reasonable movement, especially relative to Schnitttiefenführungseinheit, such as a possibility of movement about at least one axis by an angle greater than 10 °, preferably greater than 20 ° and more preferably greater than 30 °. The term "cutting depth guide unit" is intended here to define, in particular, a unit which is provided to guide a component transversely to a movement direction along a predetermined path by means of an action of at least one constraining force. A "constraining force" is to be understood here in particular as meaning a force which is intended to prevent a component from moving in at least one direction and / or the component to move on a path predetermined by means of an action of the force on the component hold.

The term "stop movement unit" should in particular define a unit which is provided to allow in at least one operating state in addition to a possibility of movement of the stop element along the Schnitttiefenführungsbahn further movement possibility of the stop element along and / or about a movement axis relative to the Schnitttiefenführungseinheit. Preferably, the movement axis of the stop element extends at least substantially parallel or at least substantially transversely to the cutting depth guide track. By "substantially parallel" is meant in particular an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction relative to the reference direction a deviation in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °, and in particular is identical to the reference direction. The term "at least substantially transversely" is intended here to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, viewed in particular in one plane, having mutually different courses and in particular also of purely opposite courses of the direction and the reference direction are different from each other. The movement axis can thus run along the cutting depth guide track or have a different course to a course of the cutting depth guide track. Preferably, the movement axis is designed as a pivot axis about which the stop element is mounted movably relative to the cutting depth guide unit. However, it is also conceivable that the stop movement unit is provided to move the stop element in at least one, relative to a guide rail element of the Schnitttiefenführungseinheit fixed state of a Schnitttiefenführungselements the Schnitttiefenführungseinheit on which the stop element is arranged along a direction parallel to the cutting depth guide track movement axis.

An abutment surface of the stop element is preferably moved as a result of the further movement possibility of the stop element by the stop movement unit along at least one route in at least one operating position, wherein at least one characteristic of the route, such as a length of the route and / or a radius of the route, etc., a dimension , in particular a height, corresponds to a positive guide unit coupled to the portable machine tool. By means of the embodiment according to the invention of the depth-limiting device, it is thus advantageously possible to adjust the stop element to take into account a further relevant parameter, such as a height of a forced-guidance unit, when setting a limitation of a depth of cut, wherein advantageously a setting for taking into account the parameter decoupled from a Setting a limitation of a cutting depth by means of a movement of the stop element relative to the cutting depth guide unit along the cutting depth guide track can be done. Thus, advantageously, for example in a portable machine tool, in particular a circular saw, a setting a limitation of a depth of cut by means of a movement of the stop element relative to the cutting depth guide unit along the cutting depth guide track and then take place when using a positive guide unit, in particular a form-fitting connectable to the portable power tool guide rail, due to the further movement possibility of the stop element taking into account a height of the positive guide unit, wherein a previously set limitation of a depth of cut can be advantageously maintained and a readjustment, such as a change in position of a display element and an adjustment of a position of the stop element along the cutting depth guide path to a consideration of a height of a positive guide unit for setting a limitation of a depth of cut, can be avoided. It can thus be advantageously achieved a high ease of use.

The stop element is pivotally and / or translationally movably mounted on the cutting depth guide element to achieve a further possibility of movement of the stop element. A "cutting depth guide element" is to be understood here as meaning, in particular, an element which is movable directly or indirectly relative to the guide rail element, directly or indirectly by means of a form-locking connection with a form-locking region of the guide rail element, at least substantially transversely to a form-locking direction. The cutting depth guide element preferably has at least one latching element which is integrally formed on the cutting depth guide element and which is provided to fix the cut depth guide element in at least one position relative to the guide rail element by means of cooperation with latching recesses or with counter-latching elements of the guide rail element. The term "integral" should be understood in particular to be materially bonded, such as by a welding process and / or adhesive process, etc., and particularly advantageously formed, as understood by the production a casting and / or by the production in a one- or multi-component injection molding process. However, it is also conceivable that the cutting depth guide member has at least one latching recess, which allow by means of cooperation with integrally formed on the guide rail element latching elements, a fixing of the cutting depth guide element in at least one position relative to the guide rail element. By means of the design according to the invention of the cutting depth limiting device, a further possibility of movement of the stop element relative to the cutting depth guide unit can be achieved in a structurally simple manner.

Advantageously, the stop movement unit has at least one position fixing element, which is provided to fix the stop element in a position relative to the cutting depth guide element. Preferably, the position fixing element is designed as a spring-biased locking pin. Preferably, the position fixing element designed as a spring-biased locking pin engages in a fixing of a position of the stop element relative to the cutting depth guide element in a position fixing recess of the cutting depth guide element. However, it is also conceivable that the position fixing element has another, a skilled person appear appropriate design, such as a clamping element, etc. It can be advantageously achieved a backup of the stop element in a position relative to the cutting depth guide element to prevent unintentional movement of the stop element relative to Cutting depth guide advantageously to avoid.

It is also proposed that the cutting depth guide unit has at least one further cutting depth guide element movably mounted relative to a guide rail element of the cutting depth guide unit, on which the cutting depth guide element is movably mounted. Preferably, the further cutting depth guide element is designed as a guide slide. Preferably, the further formed as a guide carriage cutting depth guide element on a display element. The display element is preferably provided by means of a arranged on the guide rail element scale an operator set by means of the cutting depth limiting device Limiting a cutting depth display. However, it is also conceivable that the display element is designed as a digital display, by means of which a set limit of a cutting depth can be displayed. In this case, the cutting depth guide element is preferably mounted pivotably on the further cutting depth guide element. However, it is also conceivable that the cutting depth guide element is mounted translationally movable on the further cutting depth guide element. By means of the inventive design of the cutting depth limiting device structurally simple guidance of the stop element for setting a limit of a cutting depth and additionally a locking ability of the stop element can be achieved relative to the guide rail element to limit the depth of cut.

In addition, it is proposed that the cutting depth guide unit has at least one spring element which is provided to act on the cutting depth guide element with a spring force in the direction of the guide rail element. A "spring element" is to be understood in particular as a macroscopic element which has at least one extension that is elastically changeable by at least 10%, in particular by at least 20%, preferably by at least 30% and particularly advantageously by at least 50% in a normal operating state , And in particular generates a dependent of a change in the extension and preferably proportional to the change of counterforce, which counteracts the change. An "extension" of an element should, in particular, be understood to mean a maximum distance between two points of a vertical projection of the element onto a plane. By a "macroscopic element" is meant in particular an element with an extension of at least 1 mm, in particular of at least 5 mm and preferably of at least 10 mm. Preferably, the spring element is designed as a compression spring. However, it is also conceivable that the spring element has another, a skilled person appear appropriate design. By means of the spring element can be achieved in particular advantageous in a one-piece design of the cutting depth guide element with at least one locking element an automatic engagement of the locking element in corresponding recesses of the guide rail element.

Furthermore, it is proposed that the stop movement unit has at least one stop movement element embodied as an operating lever, which is mounted so as to be pivotable about the movement axis on a cutting depth guide element of the cut depth guide unit. However, it is also conceivable that the stop movement element has another, a person skilled in appearing appropriate design, such as a push button, as a slider, etc. Preferably, the stop movement element is movably mounted on the trained with at least one integrally formed locking element cutting depth guide. It can advantageously be achieved a comfortable operation of the stop movement unit to a movement of the stop element.

Advantageously, the stop element and the stop movement element are firmly connected to each other. In this case, the stop element and the stop movement element can be connected to each other by means of a positive, a non-positive and / or a material connection. Preferably, the stop element and the stop movement element are firmly connected to one another by means of a screw connection. By "firmly connected to each other" is meant in particular a connection between at least two components, by means of which a movement of one of the components directly, in particular decoupled from interconnected components, excluding connecting elements, is transmitted to the other component. However, it is also conceivable that the stop element and the stop movement element via an intermediate unit, such as a transmission, or a lever mechanism, etc., are connected to each other depending on movement. Preferably, the stop element and the stop movement element are arranged offset by approximately 180 ° relative to one another. It can be structurally simple movement of the stop movement element are transmitted to the stop element. In particular, when using a screw connection, a cost-effective variant for transmitting movement between the stop element and the stop movement element can be achieved.

Furthermore, it is proposed that the movement axis of the stop element extends at least substantially perpendicular to a course of the cutting depth guide track. However, it is also conceivable that the movement axis of the stop element extends at least substantially parallel to the cutting depth guide track. It can be advantageously achieved a compact arrangement of the stop element.

Advantageously, the stop element is pivotally mounted about the axis of movement on the cutting depth guide element. Preferably, the stop element is pivotally mounted relative to the cutting depth guide element on the cutting depth guide element. However, it is also conceivable that the stop element is mounted translationally movable relative to the cutting depth guide element on the cutting depth guide element. By means of the pivotable mounting of the stop element, a dirt-resistant mounting of the stop element can advantageously be achieved. Thus, advantageously, a robust stop movement unit can be realized.

Furthermore, the invention is based on a portable power tool, in particular a circular saw, which comprises a cutting depth limiting device according to the invention. A "portable machine tool" is to be understood here in particular as meaning a machine tool for machining workpieces, which can be transported without transport machine by an operator. In particular, the portable power tool has a mass which is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg. The portable power tool is particularly preferably designed as a dip circular saw. However, it is also conceivable that the portable power tool has another, a skilled person appear appropriate design, such as a design as a submerged saw, electric hand saw, etc. It can be advantageously a high ease of use for an operator of the portable power tool can be achieved.

The inventive cutting depth limiting device and / or the portable power tool according to the invention should / should not be limited to the application and embodiment described above. Especially For example, the depth-of-cut limiting 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 performing a function described herein.

drawing

Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is 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.

Fig. 1

eine erfindungsgemäße tragbare Werkzeugmaschine mit einer erfindungsgemäßen Schnitttiefenbegrenzungsvorrichtung in einer schematischen Darstellung,

Fig. 2

eine Explosionsdarstellung der erfindungsgemäßen Schnitttiefenbegrenzungsvorrichtung in einem von der tragbaren Werkzeugmaschine demontierten Zustand in einer schematischen Darstellung,

Fig. 3a

eine Seitenansicht der erfindungsgemäßen tragbaren Werkzeugmaschine während einer Bearbeitung eines Werkstücks, wobei ein Werkzeugmaschinenanschlagbereich an einem sich in einer Werkstückposition befindlichen Anschlagelement einer Anschlageinheit der erfindungsgemäßen Schnitttiefenbegrenzungsvorrichtung anliegt, in einer schematischen Darstellung,

Fig. 3b

eine Seitenansicht der erfindungsgemäßen tragbaren Werkzeugmaschine während einer Bearbeitung eines Werkstücks mit einer mit der erfindungsgemäßen tragbaren Werkzeugmaschine gekoppelten Zwangsführungseinheit, wobei der Werkzeugmaschinenanschlagbereich an dem sich in einer Zwangsführungseinheitsposition befindlichen Anschlagelement anliegt, in einer schematischen Darstellung,

Fig. 4a

eine Detailansicht der erfindungsgemäßen Schnitttiefenbegrenzungsvorrichtung in einer Werkstückposition des Anschlagelements in einer schematischen Darstellung und

Fig. 4b

eine Detailansicht der erfindungsgemäßen Schnitttiefenbegrenzungsvorrichtung in einer Zwangsführungseinheitsposition des Anschlagelements in einer schematischen Darstellung.

Show it:

Fig. 1

a portable power tool according to the invention with a cutting depth limiting device according to the invention in a schematic representation,

Fig. 2

an exploded view of the cutting depth limiting device according to the invention in a state disassembled from the portable power tool in a schematic representation,

Fig. 3a

a side view of the portable power tool according to the invention during a machining of a workpiece, wherein a machine tool stopper region abuts against a located in a workpiece position stop element of an abutment unit of the cutting depth limiting device according to the invention, in a schematic representation,

Fig. 3b

a side view of the portable power tool according to the invention during a machining of a workpiece with a coupled with the portable power tool according to the invention forced guidance unit, wherein the machine tool stop area on which there is a stop element located in a positive guide unit position, in a schematic representation,

Fig. 4a

a detailed view of the cutting depth limiting device according to the invention in a workpiece position of the stop element in a schematic representation and

Fig. 4b

a detailed view of the cutting depth limiting device according to the invention in a positive guide unit position of the stop member in a schematic representation.

Description of the embodiment

FIG. 1 1 shows a portable power tool 12 formed as a circular plunge saw with a cutting depth limiting device 10. The portable power tool 12 further comprises a power tool housing 38, which is provided to surround a drive unit 40 of the portable power tool 12. The drive unit 40 comprises a drive shaft (not shown here in detail) for driving a tool holder (not shown here in greater detail) of the portable power tool 12 which can be coupled to a machining tool 42 (FIG. FIGS. 3a and 3b ) in a manner already known to a person skilled in the art. Furthermore, the portable power tool 12 comprises a supporting unit 44 in the form of a base plate or sliding block, with which the portable power tool 12 rests on a workpiece surface of the workpiece 86 during machining of a workpiece 86 (FIG. 3 a) or, in the case of a movement, into a cutting the workpiece 86 slides on the workpiece surface. On the support unit 44, a protective unit 46 of the portable power tool 12 is also arranged, which protects an operator from injury during machining of the workpiece 86. In this case, the protective unit 46 is designed as a protective hood, which encloses the machining tool 42 in an assembled state along a rotational direction of the drive shaft by more than 160 °. The protection unit 46 further comprises a suction coupling element 48, which with a suction unit (not shown here) to a suction of removed workpiece particles during a Processing of the workpiece 86 is connectable. The machine tool housing 38 is mounted pivotably relative to the support unit 44 on the protection unit 46. Here, the machine tool housing 38 is mounted in a manner already known to a person skilled in the art, pivotable about two pivot axes 50, 52 relative to the support unit 44 on the protective unit 46. The two pivot axes 50, 52 extend at least substantially perpendicular relative to each other. The protective unit 46 is pivotally mounted together with the machine tool housing 38 about the pivot axis 50 relative to the support unit 44 on the support unit 44. Thus, the portable power tool 12 has at least substantially a configuration already known to a person skilled in the art.

The cutting depth limiting device 10 for the portable power tool 12 is arranged to set a limitation of a cutting depth on a side facing the machine tool housing 38 side of the protection unit 46 on the protection unit 46. However, it is also conceivable that the cutting depth limiting device 10 is arranged at another, to a skilled person appear appropriate position on the protection unit 46 or other component of the portable power tool 12. The cutting depth limiting device 10 comprises at least one cutting depth guide unit 14 and at least one stop unit 16 which has at least one stop element 18 for limiting a cutting depth relative to the cutting depth guide unit 14 along a cutting depth guide track 20 of the cutting depth guide unit 14 ( FIG. 2 ). In this case, the stop element 18 is movably mounted to set a limitation of a cutting depth of the machining tool 42 in translation along the cutting depth guide track 20. The stop element 18 is mounted by means of a cutting depth guide element 28 of the cutting depth guide unit 14 movably along the cutting depth guide track 20 on a guide rail element 26 of the cutting depth guide unit 14. Here, the stop element 18 is mounted relatively movable to the cutting depth guide element 28 on the cutting depth guide member 28. Thus, the cutting depth guide unit 14 comprises at least the cutting depth guide element 28 movably mounted relative to the guide rail element 26 of the cutting depth guide unit 14, on which the stop element 18 is movably mounted relative to the cutting depth guide member 28.

The cutting depth guide unit 14 has at least one further cutting depth guide element 32 movably mounted relative to the guide rail element 26, on which the cutting depth guide element 28 provided for supporting the stop element 18 is movably mounted. The further cutting depth guide element 32 is designed as a guide slide element, which by means of a positive connection with a positive connection region 56 of the guide rail element 26 (FIG. FIG. 2 ) is mounted movably along the cutting depth guide track 20 on the guide rail element 26. The cutting depth guide element 28 provided for mounting the stop element 18 is mounted to generate a latching connection for fixing a position of the cutting depth guide element 28 and the further cutting depth guide element 32 pivotable about a pivot axis 80 extending at least substantially perpendicular to the cutting depth guide track 20 on the further cutting depth guide element 32 , The cutting depth guide element 28 is thus designed as a cutting depth locking element, which has at least one integrally formed locking element 54. However, it is also conceivable that the latching element 54 is formed separately from the cutting depth guide element 28 and by means of a, a person skilled in the sense appearing connection, such as by means of a positive and / or non-positive connection, firmly connected to the cutting depth guide member 28. The locking element 54 is formed as a latching nose, which has a polygonal cross-section. Overall, the cutting depth guide member 28 on four locking elements 54 which are integrally formed parallel to each other on the cutting depth guide member 28. However, it is also conceivable that one of four different number of locking elements 54 are integrally formed on the cutting depth guide member 28.

In order to produce a latching connection with the cutting depth guide element 28 designed as a cutting depth locking element, the guide rail element 26 has a latching rail 58. The latching rail 58 has a formation of a latching connection with the cut depth guide element designed as a cut depth latching element 28 counter-locking elements 60, which are formed with the locking elements 54 of the cutting depth guide member 28 corresponding. On a side of the guide rail element 26 facing away from the latching rail 58, the guide rail element 26 has a graduated scale 82 which interacts with a pointer element 84 arranged on the further cutting depth guide element 32 to indicate a dimension of a cutting depth corresponding to a cut depth defined by the stop unit 16. However, it is also conceivable that the cutting depth limiting device 10 comprises a digital display unit for displaying a dimension of a cutting depth corresponding to a set limit of a cutting depth.

The cutting depth guide unit 14 also has at least one spring element 34 which is provided to act on the cutting depth guide element 28 with a spring force in the direction of the guide rail element 26. As a result, engagement of the latching elements 54 and the counter-latching elements 60 in an unactuated state of the cutting depth guide element 28 is achieved. To release the latching connection between the latching elements 54 and the counter-latching elements 60, the cutting depth guide element 28 has an actuating region 62. By means of an actuation of the actuating region 62, the cutting depth guide element 28 is pivoted about the pivot axis 80 relative to the further cutting depth guide element 32. Here, the locking elements 54 and the counter-locking elements 60 are disengaged. The further cutting depth guide element 32 embodied as a guide slide element can thus be displaced relative to the guide rail element 26 along with the cutting depth guide element 28 formed as a cut depth catch element along the cutting depth guide track 20. As a result of the arrangement of the stop element 18 on the cutting depth guide element 28, the stop element 18 is also displaced along the cutting depth guide track 20 relative to the guide rail element 26. As a result, a limitation of a cutting depth of the machining tool 42 is set. The cutting depth guide element 28 and the further cutting depth guide element 32 thus form part of the stop unit 16. The machine tool housing 38 strikes upon machining of the workpiece 86 by means of the machining tool 42 with a pivoting movement of the machine tool housing 38 relative to the protection unit 46 for introducing a cut into the workpiece 86 or for removal of workpiece particles of the workpiece 86 when reaching a set by means of the stop unit 16 depth of cut with a stop portion 64 on the stop element 18 at.

The cutting depth limiting device 10 further comprises at least one stop movement unit 22 which is provided, at least in one operating state, to allow further movement possibility of the stop element 18 relative to the cutting depth guide unit 14 and / or about a movement axis 24. The stop movement unit 22 is provided, at least in a latched state of the latching elements 54 of the cutting depth guide element 28 in the counter-latching elements 60 of the guide rail element 26, to allow a further movement possibility of the stop element 18 relative to the cutting depth guide unit 14. Thus, the stop movement unit 22 is provided, at least in a fixed position of the formed as a guide slide element further cutting depth guide member 32 by means of Schnitttiefenrastelement trained cutting depth guide element 28 to allow further movement possibility of the stop member 18 relative to the cutting depth guide element 28.

The stop element 18 is pivotally mounted about the movement axis 24 designed as a stop pivot axis 66 relative to the cutting depth guide element 28 on the cutting depth guide element 28. The stop pivot axis 66 extends at least substantially perpendicular to a course of the cutting depth guide path 20. In addition, the stop pivot axis 66 extends at least substantially parallel to the pivot axis 80 about which the cutting depth guide element 28 is pivotally mounted relative to the further cutting depth guide element 32. However, it is also conceivable that the abutment pivot axis 66 has another course, which appears expedient to a person skilled in the art, for example, parallel to the cutting depth guideway 20 or transversely to the cutting depth guideway 20, etc.

The stopper movement unit 22 comprises at least one. Position fixing member 30 which is provided to fix the stopper member 18 in a position relative to the cutting depth guide member 28. The position fixing member 30 is formed as a locking pin 68 which is biased by a position fixing spring member 70 of the stopper moving unit 22 with a spring force. Overall, the stop movement unit 22 has two position fixing elements 30, which are each assigned to a position of the stop element 18 relative to the cutting depth guide element 28. For a movement of the stop element 18, the stop movement unit 22 has at least one stop movement element 36 designed as an operating lever, which is mounted pivotably about the movement axis 24 on the cutting depth guide element 28 of the cutting depth guide unit 14. The stopper member 18 and the stopper member 36 are fixedly connected to each other. In this case, the stop element 18 is connected by means of a screw connection, which comprises a screw 72 which can be screwed into the stop movement element 36 and a disk 74, firmly connected to the stop movement element 36. The stop element 18 is thus motion-dependent on a movement of the stop movement element 36. The stop movement element 36 has a latching recess 76 into which a position of the stop movement element 36 and thus the stop element 18 relative to the cut depth guide element 28 of one of the two position fixing elements 30 to a fixation of a position the stop movement element 36 and thus of the stop element 18 engages. The two position fixing elements 30 are arranged offset by approximately 90 ° relative to one another on the cutting depth guide element 28 ( FIGS. 4a and 4b ). In this case, the position fixing elements 30 designed as latching pins 68 are each acted upon by a spring force of one of two position fixing spring elements 70 of the stop movement unit 22 in the direction of the stop movement element 36.

The stop element 18 can thus by means of the stop movement unit 22, after setting a limitation of a cutting depth, in addition to the movement axis 24 formed as a stop pivot axis 66 from a workpiece position ( FIGS. 3a and 4a ) of the stop element 18 in a positive guide unit position of the stop element 18 (FIG. FIGS. 3b and 4b ) emotional become. The stop element 18 and the stop movement element 36 are mounted, starting from the workpiece position or the forced guiding position of the stop element 18, in each case at an angle of 90 ° about the movement axis 24 formed as stop pivot axis 66 relative to the cutting depth guide element 28 on the cutting depth guide element 28. Thus, in the workpiece position of the abutment member 18, a first abutment surface of the abutment member 18 defines a boundary surface against which the machine tool housing 38 can abut pivotally relative to the guard unit 46 about the pivot axis 52 with the abutment portion 64 to limit a depth of cut. A second, at least substantially offset by 90 ° to the first stop surface of the stop element 18 stop surface of the stop element 18, forms in the positive guide unit position of the stop element 18 has a further boundary surface on which the machine tool housing 38 with a pivoting movement relative to the protection unit 46 about the pivot axis 52 with the stopper portion 64 to limit a depth of cut when using a positive guide unit 78 of a machine tool system, which includes the portable power tool 12, during a machining of the workpiece 86 can strike.

As a result, for example, when using the forced-motion unit 78 (FIG. FIG. 3b ) of the machine tool system, an adaptation of a previously set limit of a cutting depth in the workpiece position of the stop element 18 to a height of the positive guide unit 78 takes place. By means of a switchover from the factory return position to the forced guiding position of the stop element 18, with a previously set cutting depth during machining of the workpiece 86, it is achieved that the machining tool 42 penetrates into the workpiece 86 in the forced guiding position of the stop element 18 when the positive guide unit 78 is used From the workpiece 86, as in the workpiece position, the stop element 18 decouples from use of the positive guide unit 78. The positive guide unit 78 is designed as a guide rail which can be arranged on the workpiece 86. The positive guide unit 78 designed as a guide rail is provided for guiding the portable power tool 12 along at least one direction. By means of a movement of the stop element 18 relative to the sectional depth of the guide element formed as Schnitttiefenrastelement 28 from the workpiece position in the positive guidance unit position when using a positive guide unit 78 during processing of the workpiece 86 by the portable power tool 12, a height of the positive guide unit 78 is compensated. A readjustment of an adjustment of a limitation of the depth of cut by means of a movement of the cutting depth guide element 28 and the further cutting depth guide element 32 to a displacement of the stop element 18 along the cutting depth guide track 20 relative to the guide rail element 26 thus omitted in a choice of machining the workpiece 86 coupled to the positive guide unit 78 or a Selection of a machining of the workpiece 86 decoupled from the positive guide unit 78. An outgoing from the workpiece position of the stop element 18 pivotal movement of the stop member 18 about the movement formed as a stop pivot axis 66 movement axis 24 relative to the fixed cutting depth guide element 28 is thus intended to adapt an in the workpiece position of the stop element 18 set limit of a depth of cut in a use of the positive guide unit 78 during a machining of the workpiece 86 to a Hö he forced control unit 78 make. The abutment portion 64 of the machine tool housing 38 abuts in the workpiece position of the abutment member 18 at a constant position of the cutting depth guide member 28 relative to the guide rail member 26 to a fixed setting a limitation of a depth of cut compared to striking the abutment portion 64 of the machine tool housing 38 in the forced operation unit position of the stop element 18 a shorter distance, along which the machine tool housing 38 is pivoted about the pivot axis 52 to make a cut by means of the machining tool 42 relative to the protection unit 46 at.

Claims (12)

1. Cut-depth limiting device for portable power tools, comprising a power tool housing (38), comprising at least one cut-depth guide unit (14), and comprising at least one stop unit (16), which has at least one stop element (18) that, for the purpose of limiting a depth of cut, strikes a stop region (64) of the power tool housing (38) and has a capability to move, relative to the cut-depth guide unit (14), along a cut-depth guide path (20) of the cut-depth guide unit (14), the cut-depth limiting device having at least one stop movement unit (22), which is provided to allow a further capability of the stop element (18) to move, relative to the cut-depth guide unit (14), translationally along and/or rotationally about a movement axis (24), at least when in an operating state, characterized in that the cut-depth guide unit (14) comprises at least one cut-depth guide element (28), which is mounted so as to be movable relative to a guide rail element (26) of the cut-depth guide unit (14) and on which the stop element (18) is mounted so as to be movable relative to the cut-depth guide element (28).
2. Cut-depth limiting device according to Claim 1, characterized in that the stop movement unit (22) has at least one position fixing element (30), which is provided to fix the stop element (18) in a position relative to the cut-depth guide element (28).
3. Cut-depth limiting device at least according to Claim 1, characterized in that the cut-depth guide unit (14) has at least one further cut-depth guide element (32), which is mounted so as to be movable relative to a guide rail element (26) and on which the cut-depth guide element (28) is movably mounted.
4. Cut-depth limiting device at least according to Claim 1, characterized in that the cut-depth guide unit (14) has at least one spring element (34), which is provided to apply a spring force to the cut-depth guide element (28) in the direction of the guide rail element (26).
5. Cut-depth limiting device according to any one of the preceding claims, characterized in that the stop movement unit (22) has at least one stop movement element (36), realized as an operating lever, which is mounted on a cut-depth guide element (28, 32) of the cut-depth guide unit (14) so as to be pivotable about the movement axis (24).
6. Cut-depth limiting device according to Claim 5, characterized in that the stop element (18) and the stop movement element (36) are fixedly connected to each other.
7. Cut-depth limiting device according to any one of the preceding claims, characterized in that the movement axis (24) of the stop element (18) runs at least substantially perpendicularly in relation to a course of the cut-depth guide path (20).
8. Cut-depth limiting device according to any one of the preceding claims, characterized in that the stop element (18) is mounted on a cut-depth guide element (28, 32) of the cut-depth guide unit (14) so as to be pivotable about the movement axis (24).
9. Portable power tool, in particular a circular saw, comprising at least one cut-depth limiting device according to any one of the preceding claims.
10. Cut-depth limiting device according to any one of the preceding claims, characterized in that, after a limitation of a depth of cut has been set, the stop element (18) can additionally be moved, about the movement axis (24) realized as a stop pivot axis (66), from a workpiece position of the stop element (18) to a constraining guide unit position of the stop element (18), by means of the stop movement unit (22).
11. Cut-depth limiting device according to Claim 10, characterized in that the stop element (18) and the stop movement element (36) are mounted on the cut-depth guide element (28) such that they are each pivotable about the movement axis (24), realized as a stop pivot axis (66), relative to the cut-depth guide element (28) by an angle of 90°, starting from the workpiece position or the constraining guide position of the stop element (18).
12. Cut-depth limiting device according to any one of the preceding claims, characterized in that the stop element (18) constitutes a first stop surface, which represents a limiting surface, against which the stop region (64) of the power tool housing (38) can strike, upon a pivot movement relative to a safety unit (46) about a pivot axis (52), for the purpose of limiting a depth of cut.

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