WO2012116837A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
WO2012116837A1
WO2012116837A1 PCT/EP2012/000949 EP2012000949W WO2012116837A1 WO 2012116837 A1 WO2012116837 A1 WO 2012116837A1 EP 2012000949 W EP2012000949 W EP 2012000949W WO 2012116837 A1 WO2012116837 A1 WO 2012116837A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
machine tool
cutting
guide
cutting strand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2012/000949
Other languages
German (de)
English (en)
Inventor
Rudolf Fuchs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2012116837A1 publication Critical patent/WO2012116837A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D57/00—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00
    • B23D57/02—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00 with chain saws
    • B23D57/023—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00 with chain saws hand-held or hand-operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0083—Attachments for guiding or supporting chain saws during operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/10—Measures preventing splintering of sawn portions of wood

Definitions

  • Portable machine tools comprise a coupling device which can be coupled to a machine tool separating device formed by a cutting strand and a guide unit.
  • the invention is based on a portable power tool having at least one coupling device which can be coupled to a power-tool separating device formed from at least one cutting strand and at least one guide unit. It is proposed that the portable power tool at least one
  • Spanausr constitutikaku includes.
  • the machine tool and the tool guide unit preferably together form a tool system.
  • a "portable power tool” is to be understood here in particular as meaning a power tool, in particular a power tool, which can be transported by an operator so that it can not be transported particularly preferably less than 5 kg.
  • the portable machine tool comprises at least one drive unit for driving the cutting strand.
  • the term "drive unit” is intended here to define in particular a unit which is provided for forces and / or
  • the drive unit is formed directly and / or indirectly coupled to the cutting strand.
  • the drive unit comprises at least one stator and at least one rotor, which has at least one armature shaft.
  • the drive unit is designed as an electric motor unit.
  • the drive unit has another, to a professional appear appropriate design.
  • a “coupling device” is to be understood here as meaning, in particular, a device which is intended to operatively connect the machine tool separating device to the portable machine tool by means of a positive and / or non-positive connection for machining a workpiece
  • the coupling device In the state of the coupling device, in an operating state of the portable power tool, forces and / or torques are transmitted from the drive unit of the portable power tool for driving the cutting strand to the power-tool parting device, thus, the coupling device is preferably designed as a tool receptacle.
  • a “cutting strand” is to be understood here as meaning, in particular, a unit which is intended to locally cancel the atomic cohesion of a workpiece to be machined, in particular by means of a mechanical separation and / or by means of a mechanical removal of material particles of the workpiece to separate the workpiece into at least two physically separate parts and / or to at least partially separate and / or remove material particles of the workpiece from a surface of the workpiece, particularly preferably along a circumference of the cutting strand in at least one operating state
  • a "guide unit” is to be understood here as meaning, in particular, a unit which is provided with a constraining force at least along a direction perpendicular to a cutting direction of the cutting strand onto the cutting strand exercise to specify a possibility of movement of the cutting strand along the cutting direction.
  • the guide unit has at least one guide element, in particular a guide groove, through which the cutting strand is guided.
  • the cutting strand viewed in a cutting plane, guided along an entire circumference of the guide unit by the guide unit by means of the guide element, in particular the guide groove.
  • the guide unit is designed as a sword.
  • the term "sword" is intended here to define in particular a geometric shape which, viewed in the cutting plane, has a closed outer contour which comprises at least two mutually parallel straight lines and at least two respectively connecting ends of the straight lines connecting connecting sections, in particular circular arcs,
  • the guide unit has a geometric shape which, viewed in the cutting plane, is composed of a rectangle and at least two circular sectors arranged on opposite sides of the rectangle
  • Cutting strand is moved in at least one operating state along a circumference of the guide unit in at least two mutually oppositely directed cutting directions relative to the guide unit.
  • 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 an plane and / or a direction relative to a further plane and / or a further direction, which preferably depends on a parallel orientation of the plane and / or the direction relative to
  • the cutting plane is 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.
  • an orientation of a direction relative to a reference direction in particular in a plane, is to be understood here, the direction relative to the reference direction having 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 to separate and / or remove material particles of a workpiece to be machined in at least one operating state as a result of a driving force and / or a drive torque, in particular in the guide unit, is moved.
  • the cutting strand is moved in an operating state along the cutting direction relative to the guide unit.
  • the cutting strand and the guide unit preferably together form a closed system.
  • the term "closed system” is intended to define a system comprising at least two components that retain functionality and / or function in the system by interacting in a disassembled state of the system from a system-superior system, such as a portable machine tool
  • the at least two components of the closed system are at least substantially inseparably connected with each other for an operator.
  • "At least substantially unsolvable” is to be understood here as meaning, in particular, a connection of at least two components which are only with the aid of assistance of separating tools, such as a saw, in particular a mechanical saw, etc., and / or chemical separating agents, such as solvents, etc., are separable from each other.
  • chip removal protection unit is intended here to define in particular a unit which is intended to prevent chipping of chips at least in a region of a surface of the workpiece which adjoins a section which can be introduced by means of the machine tool cutting device when machining a workpiece by means of the machine tool cutting device
  • the chip break-out unit slides at least with a partial area on a surface of a workpiece to be machined
  • the chip break-out protection unit preferably comprises at least one workpiece two chip breaker elements which, viewed along a direction perpendicular to the cutting plane in a mounted state of the power tool cutting device, in a distance of less than 8 mm, preferably less than 5 mm and more preferably less than 3 mm are arranged relative to each other.
  • the at least two chip breakage protection elements have a distance, viewed along a direction perpendicular to the cutting plane in a mounted state of the machine tool cutting device, that corresponds to a maximum dimension of the machine tool separating device, in particular of the cutting strand along the direction perpendicular to Cutting plane extending direction corresponds.
  • the portable power tool has a machine tool unit on which the chip removal protection unit is mounted.
  • the machine tool unit is designed as a housing unit.
  • the drive unit and the gear unit are mounted in the housing unit.
  • the machine tool unit is designed as a sliding shoe and / or as a tool support unit, etc.
  • the chip breaker is relative to the housing unit linearly movable on and / or stored in the housing unit. It can be achieved structurally simple Spanausr combinschutzvenez.
  • the chip breakage protection unit has at least one spring element which is provided to act on at least one guide element of the chip breakage protection unit at least in a direction away from the machine tool unit with a spring force.
  • 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 which in particular produces a counterforce which is dependent on a change in the extent and preferably proportional to the change and which counteracts the change.
  • Extension of an element is understood to mean, in particular, a maximum distance between two points of a vertical projection of the element onto a plane .
  • a "macroscopic element” is to be understood as meaning, in particular, an element having an extension of at least 1 mm, in particular of at least 5 mm and preferably of at least 10 mm.
  • the machine tool unit has at least one guide recess, in which at least one guide element of the chip breaker unit is arranged movably relative to the machine tool unit in an assembled state.
  • a “guide recess” is to be understood here as meaning, in particular, a recess which is intended to exert a constraining force on at least one direction on the guide element by means of edge regions which delimit the recess, in order to predetermine a possibility of movement of the guide element within the recess Spanausr constitutikech along at least substantially parallel to a longitudinal axis of the guide unit extending
  • the longitudinal axis of the guide unit preferably runs at least substantially parallel to the straight lines of the outer contour of the guide unit. It can structurally simple a movable storage of Spanausr employschutzatti be realized relative to the machine tool unit. Distance can advantageously be a direct contact of a portion of the
  • the chip removal protection unit comprises at least one precutting device, which is intended to cut at least one surface of a workpiece to be machined.
  • the surface of a workpiece to be machined is particularly preferably scribed by means of the precutting device in a region in which a cut is to be made by means of the machine tool parting device before a cut is made by means of the machine tool parting device into a workpiece to be machined.
  • the pre-cutting device comprises at least one pre-cutting element designed as a blade, which is arranged in a plane which extends at least substantially offset parallel to the cutting plane of the cutting strand.
  • the precutting element is, viewed in front of the workpiece, along a direction extending from the coupling device in the direction of a handle and / or a grip region. arranged machine tool separating device. It can be advantageously prevented a tearing of chips in the region of cut edges.
  • the invention is based on a power tool separating device with at least one cutting strand and with at least one guide unit.
  • the power-tool parting device comprises a chip break-out unit.
  • the Spanausr flourishtikaku is attached to the guide unit.
  • the chip breakage protection unit is connected to the guide unit at least in an operating state by means of a form-locking and / or a frictional connection.
  • the chip breakage protection unit is releasably connected to the guide unit.
  • precise cuts can be made by means of the machine tool separating device into a workpiece to be machined.
  • the chip breaker unit comprise at least one precutting unit which is provided to pre-cut at least one surface of a workpiece to be machined prior to machining the workpiece with the cutting strand.
  • the surface of a workpiece to be machined by means of the pre-cutting in a region in which a cut is to be introduced by means of the machine tool cutting device, scribed before a cut is introduced by means of the machine tool cutting device in a workpiece to be machined.
  • the pre-cutting device comprises at least one pre-cutting element designed as a blade, which is arranged in a plane which extends at least substantially offset parallel to the cutting plane of the cutting strand. It may be advantageous to scrape cutting edges and to introduce cuts by means of the machine tool parting device during an operating state during a movement of the power tool parting device relative to a workpiece to be machined.
  • 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.
  • the power-tool parting device according to the invention and / or the portable power-tool according to the invention can be used to fulfill one of them Functioning described have a number of individual elements, components and units differing from a number mentioned herein.
  • alternative embodiments of the chip breaker protection unit reference may be made in particular to the document EP 0 621 821 B1, whose contents, in particular with regard to alternative embodiments of the chip breaker unit, are to be regarded as part of the disclosure of the present document.
  • FIG. 1 shows a portable power tool according to the invention with a machine tool separating device according to the invention in a schematic representation
  • FIG. 2 is a detailed view of a chip removal protection unit of the portable power tool according to the invention in a schematic representation
  • FIG. 3 shows a sectional view along the line III-III from FIG. 2 of the chip breaker unit in a schematic representation
  • FIG. 4 is a detailed view of the machine tool separating device according to the invention in a schematic representation
  • 5 is a sectional view along the line VV of Figure 4 of the machine tool separating device according to the invention in a schematic representation
  • 6 is a detail view of cutter support elements of a
  • FIG. 7 shows a further detailed view of one of the cutter carrier elements of the cutting strand of the machine tool cutting device according to the invention in a schematic representation
  • FIG. 8 shows a detailed view of an arrangement of the cutter carrier elements in a guide unit of the machine tool separating device according to the invention in a schematic representation
  • FIG. 9 shows an alternative portable machine tool according to the invention with an alternative chip breaker unit in a schematic representation
  • FIG. 11 is a sectional view along the line Xl-Xl of Figure 10 of the alternative chip breaker in a schematic representation
  • FIG. 12 shows a detailed view of an alternative inventive machine tool separating device in a schematic representation.
  • FIG. 1 shows a portable machine tool 10a with a machine tool separating device 18a, which together form a machine tool system.
  • the portable power tool 10a has a coupling device 12a for the positive and / or non-positive coupling with the machine tool separating device 18a.
  • the coupling device 12a can be embodied as a bayonet closure and / or as another coupling device that appears meaningful to a person skilled in the art.
  • the portable power tool 10a has a machine tool unit 22a formed as a housing unit, which encloses a motor unit 44a and a gear unit 46a of the portable power tool 10a.
  • the motor unit 44a and the gear unit 46a are for generating one on the power tool separating device 18a transferable drive torque in a manner already known to a person skilled in the art operatively connected.
  • the motor unit 44a and / or the gear unit 46a are provided to be coupled in a mounted state by means of the coupling device 12a to a cutting strand 14a of the power-tool parting device 18a.
  • the gear unit 46a of the portable power tool 10a is formed as an angle gear.
  • the motor unit 44a is designed as an electric motor unit. However, it is also conceivable for the motor unit 44a and / or the gear unit 46a to have another configuration that appears appropriate to a person skilled in the art.
  • the motor unit 44a is provided for driving the cutting strand 14a of the power-tool parting device 18a in at least one operating state with a cutting speed of less than 6 m / s.
  • the portable power tool 10a has at least one operating mode in which a drive of the cutting strand 14a in a guide unit 16a of the machine tool separating device 18a along a cutting direction 48a of the cutting strand 14a with a cutting speed of less than 6 m / s is made possible.
  • the portable power tool 10a comprises a support unit 50a for resting on a workpiece to be machined by the portable power tool 10a (not shown in detail here).
  • the support unit 50a is designed as a sliding block and / or as a base plate, by means of which and / or which the portable power tool 10a slides and / or is supported on the workpiece during proper handling during machining of a workpiece.
  • FIG. 2 shows an arrangement of a chip breaker unit 20a of the portable power tool 10a on the unit machine tool unit 22a of the portable power tool 10a.
  • the chip breaker protection unit 20a is in this case mounted linearly movably on the machine tool unit 22a designed as a housing unit.
  • the machine tool unit 22a embodied as a housing unit has two guide recesses 28a, 30a, in which two guide elements 32a, 34a of the chip breakaway protection unit 20a are movably mounted in an assembled state relative to the machine tool unit 22a designed as a housing unit.
  • the guide recesses 28a, 30a extend in a coupled state of the power-tool parting device 18a with the coupling device 12a in two at least substantially parallel to a cutting plane of the Cutting strand 14a arranged levels.
  • the guide elements 32a, 34a engage, for example by means of threaded bolts (not shown here), which engage in a slot (not shown in detail here) of the guide elements 32a, 34a , secured in the guide recesses 28a, 30a.
  • the guide elements 32a, 34a are secured against falling out by means of other securing elements that appear appropriate to a person skilled in the art.
  • the guide recesses 28a, 30a have a greater extension than the guide elements 32a, 34a along a longitudinal movement direction of the guide elements 32a, 34a, along which the guide elements 32a, 34a are arranged to be linearly movable in the guide recesses 28a, 30a.
  • the chip breaker unit 20a includes two spring members 24a, 26a provided to apply a spring force to the chip breaking protection unit 20a in a direction away from the machine tool unit 22a formed as a housing unit.
  • one of the two spring elements 24a, 26a is arranged on one of the guide elements 32a, 34a.
  • the guide elements 32a, 34a respectively extend through the spring element arranged on the respective guide element 32a, 34a
  • the spring elements 24a, 26a are designed as compression springs. However, it is also conceivable that the spring elements 24a, 26a have another, a skilled person appear appropriate design, such as a plate spring, as Evolutfeder etc.
  • the spring elements 24a, 26a are each supported by one end 52a, 54a on an outer side designed as a housing unit machine tool unit 22a. With a further end 56a, 58a, the spring elements 24a, 26a are each supported on a shoulder 60a, 62a of the guide elements 32a, 34a.
  • the chip breaker unit 20a has two chip breakage protection members 64a, 66a formed integrally with the guide members 32a, 34a.
  • the Spannausr complicatschutzetti 64a, 66a are movably mounted by means of the guide elements 32a, 34a relative to the housing formed as a machine tool unit 22a.
  • the chip breakage protection elements 64a, 66a are additionally mounted to be movable relative to one another.
  • the chip breaker protection elements 64a, 66a are each in one coupled state of the power-tool parting device 18a with the coupling device 12a on one of two outer walls 68a, 70a of the guide unit 16a.
  • the power-tool parting device 18a is arranged in a coupled state with the coupling device 12a in a partial region, viewed along a direction at least substantially perpendicular to the cutting plane of the cutting strand 14a, between the chip break-out protection elements 64a, 66a.
  • the chip break-out protection elements 64a, 66a can slide on the outer walls 68a, 70a along the longitudinal movement direction of the guide elements 32a, 34a.
  • the chip breaker elements 64a, 66a are pressed onto a surface of the workpiece during machining of a workpiece in order to avoid chipping of chips in the region of cut edges of a section which can be introduced by means of the cutting strand 14a due to the spring force of the spring elements 24a, 26a.
  • the chip breakage protection elements 64a, 66a rest flush against outer edges of cutting elements 72a, 74a of the cutting strand 14a in a partial area of the power-tool parting device 18a (FIG. 3).
  • the chip breakage protection elements 64a, 66a each have an adjustable partial area which, as a function of a total width of the machine tool separating device 18a, viewed along a direction perpendicular to the flat plane, can be adjusted by means of a setting unit.
  • the chip breaker protection elements 64a, 66a can each be adapted to a machine tool separating device coupled to the coupling device 12a.
  • the chip breakage protection elements 64a, 66a each have a replaceable partial area which, as a result of an exchange with another partial area, can be adapted to a total width of a machine tool separating device coupled to the coupling device 12a.
  • FIG. 4 shows the power-tool parting device 18a in a state decoupled from the coupling device 12a of the portable power tool 10a.
  • the machine tool separating device 18a has the cutting strand 14a and the guide unit 16a, which together form a closed system.
  • the guide unit 16a is designed as a sword.
  • the guide unit 16a viewed in the cutting plane of the cutting strand 14a, at least two convexly shaped ends 76a, 78a.
  • the convex The ends 76a, 78a of the guide unit 16a are arranged on two opposite sides of the guide unit 16a.
  • the cutting strand 14a is guided by the guide unit 16a.
  • the guide unit 16a at least one guide element 80a ( Figure 8), by means of which the cutting strand 14a is guided.
  • the guide member 80a is here formed as a guide groove 82a, which extends in the cutting plane of the cutting strand 14a along an entire circumference of the guide unit 16a.
  • the cutting strand 14a is guided by means of the guide groove 82a bounding edge regions of the guide unit 16a.
  • the guide element 80a is formed in another manner that appears appropriate to a person skilled in the art, such as, for example, as rib-like molding on the guide unit 16a, which engages in a recess on the cutting strand 14a.
  • the cutting strand 14a viewed in a plane perpendicular to the cutting plane, is surrounded on three sides by the edge regions delimiting the guide groove 78a (FIG. 8). The cutting strand 14a is during a
  • the power-tool parting device 18a has a torque transmission element 42a, which is at least partially supported by means of the guide unit 16a, for driving the cutting strand 14a.
  • the torque transmission element 42a has a coupling recess 84a, which in a mounted state can be coupled to the motor unit 44a and / or the gear unit 46a.
  • the coupling recess 84a is arranged concentrically in the torque transmission element 42a.
  • the coupling recess 84a is formed as a hexagon socket.
  • the coupling recess 84a to have another configuration that appears appropriate to a person skilled in the art. In an uncoupled state of the torque transmitting member 42a with the motor unit 44a and / or the gear unit 46a, the torque transmitting member 42a is transverse to the cutting direction 48a of FIG.
  • Cutting strand 14a and / or arranged along the cutting direction 48a in the guide unit 16a movable ( Figure 5).
  • the torque transmission element 42a is at least partially disposed between the two outer walls 68a, 70a of the guide unit 16a.
  • the outer walls 68a, 70a extend at least substantially parallel to the cutting plane of the cutting strand 14a.
  • the guide unit 16a has in outer surfaces 86a, 88a of the outer walls 68a, 70a each have a recess 90a, 92a, in which the torque transmission element 42a is at least partially arranged.
  • the torque transmission element 42a is arranged with a partial region in the recesses 90a, 92a of the outer walls 68a, 70a.
  • the torque transmission element 42a has, at least in the partial region arranged in the recesses 90a, 92a, an extension along an axis of rotation 94a of the torque transmission element 42a, which terminates flush with one of the outer surfaces 86a, 88a of the guide unit 16a.
  • FIG. 6 shows a detailed view of cutter carrier elements 96a, 98a of the cutting strand 14a of the power tool separating device 18a.
  • the cutting strand 14a comprises a plurality of interconnected cutter support elements 96a, 98a, each interconnected by a connecting element 100a, 102a of the cutting strand 14a, which is at least substantially flush with one of two outer surfaces 104a, 106a of one of the interconnected cutter support elements 96a, 98a (see also Figure 8).
  • the connecting elements 100a, 102a are bolt-shaped.
  • the outer surfaces 104a, 106a extend in a state arranged in the guide groove 82a of the cutting strand 14a at least substantially parallel to the cutting plane of the cutting strand 14a.
  • a person skilled in the art will, depending on the application, have a suitable number of cutter carrier elements 96a for the cutting strand 14a.
  • the cutter support elements 96a, 98a are each in one piece formed with one of the connecting elements 100a, 102a. Furthermore, the cutter support elements 96a, 98a each have a connecting recess 108a, 110a for receiving one of the connecting elements 100a, 102a of the interconnected cutter support elements 96a, 98a.
  • the connecting elements 100a, 102a are guided by means of the guide unit 16a (FIG. 8). Here, the connecting elements 100a, 102a are arranged in the assembled state of the cutting strand 16a in the guide groove 82a.
  • the connecting elements 100a, 102a may, viewed in a plane perpendicular to the cutting plane, be supported on two side walls 112a, 114a of the guide groove 82a.
  • the side walls 112a, 114a define the guide groove 82a along a direction perpendicular to the cutting plane.
  • the side walls 112a, 114a of the guide groove 82a extend outward from the guide unit 16a perpendicular to the cutting direction 48a of the cutting strand 14a.
  • the cutter support elements 96a, 98a of the cutting strand 14a each have a recess 116a, 118a, which is in each case arranged in an assembled state on a torque transmission element 42a facing side 120a, 122a of the respective cutter support member 96a, 98a.
  • the torque transmission element 42a engages in at least one operating state
  • the torque transmission element 42a is formed here as a gear.
  • the torque transmitting element 42a includes teeth 124a, 126a provided for, in at least one operating state, for driving the cutting strand 14a into the recesses 116a, 118a of the cutter support elements
  • the torque transmitting member 42a facing sides 120a, 22a of the cutter support members 96a, 98a are formed in a circular arc.
  • the sides 120a, 122a of the cutter carrier elements 96a, 98a facing the torque transmission element 42a in an assembled state are each in partial regions 128a, 130a, 132a, 134a between a central axis 136a of the respective connecting element 100a, 102a and a central axis 138a, 140a of the respective one Connection recess 108a, 110a viewed, circular arc designed.
  • the arcuate portions 128a, 130a, 132a, 134a are respectively formed adjacent to the recesses 116a, 118a into which the torque transmitting member 42a engages.
  • the circular-arc-shaped partial areas 28a, 130a, 132a, 134a a radius corresponding to a radius of a course of the guide groove 82a at the convex ends 76a, 78a.
  • the partial regions 128a, 130a, 132a, 134a are concave (FIG. 7).
  • the cutting strand 14a has the cutting elements 72a, 74a.
  • the cutting elements 72a, 74a are each formed integrally with one of the cutter support elements 96a, 98a.
  • a number of the cutting elements 72a, 74a are dependent on a number of cutter support elements 96a, 98a.
  • a person skilled in the art will select a suitable number of cutting elements 72a, 74a depending on the number of cutter carrier elements 96a, 98a.
  • the cutting elements 72a, 74a are provided to allow a separation and / or removal of material particles of a workpiece to be machined (not shown here).
  • the cutting elements 72a, 74a can be designed, for example, as a full chisel, semi-chisel or other types of cutting edge that appear meaningful to a person skilled in the art, which are intended to enable a separation and / or removal of material particles of a workpiece to be machined.
  • the cutting strand 14a is endless.
  • the blade carrier elements 96a, 98a are in this case designed as chain links, which are connected to one another by means of the bolt-shaped connecting elements 100a, 102a.
  • the cutting strand 14a, the cutter support elements 96a, 98a and / or the connecting elements 100a, 102a are configured in another manner that appears appropriate to a person skilled in the art.
  • FIGS. 9 to 12 show two alternative embodiments. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, the letters a to c are added to the reference numerals of the embodiments. The following description is essentially limited to the differences from the first exemplary embodiment in FIGS. 1 to 8, wherein reference can be made to the description of the first exemplary embodiment in FIGS. 1 to 8 with regard to components, features and functions that remain the same.
  • FIG. 9 shows an alternative portable power tool 10b with a machine tool separating device 18b, which together form a machine tool Form system.
  • the portable power tool 10b and the power tool cutting device 18b each have a portable power tool 10a described in FIGS. 1 to 8 and a structure similar to the described power tool separating device 14a.
  • the portable power tool 10b has a coupling device 12b which can be coupled to the machine tool separating device 18b formed by a cutting strand 14b and a guide unit 16b.
  • the portable power tool 10b includes a chip breaker unit 20b.
  • the chip breaker protection unit 20b is in this case mounted on a housing unit designed as a machine tool unit 22b of the portable power tool 10b linearly movable.
  • the machine tool unit 22b designed as a housing unit has two guide recesses 28b, 30b in which two guide elements 32b, 34b of the chip breaker unit 20b are movably mounted in an assembled state relative to the machine tool unit 22b designed as a housing unit (FIG. 10).
  • the chip breaker unit 20b includes two spring members 24b, 26b which are provided to apply a spring force to the chip breaking protection unit 20b in a direction away from the machine tool unit 22b configured as a housing unit.
  • the spring elements 24b, 26b are arranged in the guide recesses 28b, 30b.
  • the spring elements 24b, 26b are each supported by one end 52b, 54b of the spring elements 24b, 26b on an edge region of the machine tool unit 22b designed as a housing unit that delimits the respective guide recess 28b, 30b.
  • the spring elements 24b, 26b are each supported on a side of the respective guide element 32b, 34b facing the respective spring element 24b, 26b.
  • the chip removal protection unit 20b comprises a precutting device 36b, which is provided to cut at least one surface of a workpiece to be machined (not shown here in detail).
  • the precutting device 36b has two precutting elements 38b, 40b designed as blades, which are each arranged in a plane which extends at least substantially parallel to the cutting plane of the cutting strand 14b.
  • a surface of a workpiece to be machined is scratched by means of the rough cutting elements 38b, 40b in a region in which a cut can be made by means of the cutting strand 14b a cut is made by means of the cutting strand 14b in a workpiece to be machined.
  • cutting edges whose distance along a direction extending at least substantially perpendicular to the cutting plane of the cutting strand 14b direction a maximum dimension of one by means of
  • Cutting strand 14b provides inculpable cut, scored by the Vorschneidettin 38b, 40b in a surface of a workpiece to be machined.
  • the pre-cutting elements 38b, 40b are viewed in a coupled state of the power-tool parting device 18b with the machine along a direction extending from the coupling device 12b in the direction of a handle and / or a grip region of the portable power tool 10b
  • Coupling device 12b arranged in front of the cutting strand 14b ( Figure 11).
  • FIG. 12 shows an alternative power-tool parting device 18c, which has a cutting strand 14c and a guide unit 16c for guiding the cutting strand 14c.
  • the power-tool parting device 18c comprises a chip break-out protection unit 20c, which is fastened to the guide unit 16c in a form-fitting and / or force-locking manner.
  • the chip breaker protection unit 20c is integrally connected to outer walls 68c, 70c of the guide unit 16c.
  • the chip removal protection unit 20c comprises two chip breakage protection elements 64c, 66c, which are movably mounted relative to the guide unit 16c.
  • the chip breakage protection elements 64c, 66c are movably mounted relative to one another.
  • the chip breakage protection elements 64c, 66c respectively abut against one of two outer walls 68c, 70c of the guide unit 16c.
  • the guide unit 16c in a partial area, viewed along a direction at least substantially perpendicular to the cutting plane of the cutting strand 14c direction, between the chip breaker protection elements 64c, 66c arranged.
  • the chip breaker unit 20c has two spring elements 24c, 26c, which are provided for guiding the chip breakage protection elements 64c, 66c in a direction running in a cutting plane of the cutting strand 14c with a spring. to apply force.
  • the chip break-out protection elements 64c, 66c can slide on the outer walls 68c, 70c.
  • the chip breaker elements 64c, 66c are pressed onto a surface of the workpiece during machining of a workpiece in order to avoid chipping of chips in the area of cut edges of a section which can be introduced by means of the cutting strand 14c due to the spring force of the spring elements 24c, 26c.
  • the chip breakage protection elements 64c, 66c rest flush against outer edges of cutting elements 72c, 74c of the cutting strand 14c in a partial region of the power-tool parting device 18c.
  • the chip breaker unit 20c has a precutting device 36c, which is provided to cut at least one surface of a workpiece to be machined (not shown here in detail).
  • the precutting device 36c has two precutting elements 38c, 40c designed as blades, which are each arranged in a plane which extends at least substantially parallel to the cutting plane of the cutting strand 14c.
  • a surface of a workpiece to be machined is scored by means of the rough cutting elements 38c, 40c in an area in which a cut is insertable by means of the cutting strand 14c, before a cut is made by the cutting strand 4c in a workpiece to be machined.
  • cutting edges whose distance along a direction extending at least substantially perpendicular to the cutting plane of the cutting strand 14c specifies a maximum dimension of a cut which can be introduced by means of the cutting strand 14c are incised by means of the precutting elements 38c, 40c in a surface of a workpiece to be machined.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

L'invention concerne une machine-outil portative comprenant au moins un dispositif d'accouplement /12a; 12b) qui peut être accouplé à un dispositif de séparation pour machine-outil composée d'au moins un brin de coupe (14a; 14b) et d'au moins une unité de guidage (16a; 16b). L'invention se caractérise en ce ladite machine-outil portative comprend au moins une unité pare-éclats (20a; 20b).
PCT/EP2012/000949 2011-03-03 2012-03-02 Machine-outil portative Ceased WO2012116837A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011005017.5 2011-03-03
DE201110005017 DE102011005017A1 (de) 2011-03-03 2011-03-03 Tragbare Werkzeugmaschine

Publications (1)

Publication Number Publication Date
WO2012116837A1 true WO2012116837A1 (fr) 2012-09-07

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Application Number Title Priority Date Filing Date
PCT/EP2012/000949 Ceased WO2012116837A1 (fr) 2011-03-03 2012-03-02 Machine-outil portative

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Country Link
DE (1) DE102011005017A1 (fr)
WO (1) WO2012116837A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140047721A1 (en) * 2011-03-03 2014-02-20 Robert Bosch Gmbh Portable Machine Tool
US11311952B2 (en) 2018-01-31 2022-04-26 Milwaukee Electric Tool Corporation Reciprocating saw
US12564890B2 (en) 2022-05-04 2026-03-03 Milwaukee Electric Tool Corporation Jigsaw

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176572A (en) * 1978-01-23 1979-12-04 Pennington Charles A Device for scoring wood panels prior to sawing
GB2042974A (en) * 1979-02-26 1980-10-01 Omark Industries Inc Chain saw
US4245390A (en) * 1979-03-30 1981-01-20 Bond David L Scoring attachment for power saws
EP0189095A1 (fr) * 1985-01-19 1986-07-30 REICH Spezialmaschinen GmbH Dispositif pour l'incision de pièces à usiner
US4821415A (en) * 1988-02-18 1989-04-18 Kress-Elektrik Gmbh & Co. Conversion set for a portable circular saw
EP0621821B1 (fr) 1992-01-14 1996-09-18 Robert Bosch Gmbh Scies mécaniques à lame avec dispositif anti-éclatement
DE10214454A1 (de) * 2002-03-30 2003-10-16 Bosch Gmbh Robert Handstichsägemaschine
DE102006062001A1 (de) * 2006-09-18 2008-03-27 Robert Bosch Gmbh Handwerkzeugmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176572A (en) * 1978-01-23 1979-12-04 Pennington Charles A Device for scoring wood panels prior to sawing
GB2042974A (en) * 1979-02-26 1980-10-01 Omark Industries Inc Chain saw
US4245390A (en) * 1979-03-30 1981-01-20 Bond David L Scoring attachment for power saws
EP0189095A1 (fr) * 1985-01-19 1986-07-30 REICH Spezialmaschinen GmbH Dispositif pour l'incision de pièces à usiner
US4821415A (en) * 1988-02-18 1989-04-18 Kress-Elektrik Gmbh & Co. Conversion set for a portable circular saw
EP0621821B1 (fr) 1992-01-14 1996-09-18 Robert Bosch Gmbh Scies mécaniques à lame avec dispositif anti-éclatement
DE10214454A1 (de) * 2002-03-30 2003-10-16 Bosch Gmbh Robert Handstichsägemaschine
DE102006062001A1 (de) * 2006-09-18 2008-03-27 Robert Bosch Gmbh Handwerkzeugmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140047721A1 (en) * 2011-03-03 2014-02-20 Robert Bosch Gmbh Portable Machine Tool
US9339878B2 (en) * 2011-03-03 2016-05-17 Robert Bosch Gmbh Portable machine tool
US9610698B2 (en) 2011-03-03 2017-04-04 Robert Bosch Gmbh Portable machine tool
US11311952B2 (en) 2018-01-31 2022-04-26 Milwaukee Electric Tool Corporation Reciprocating saw
US12564890B2 (en) 2022-05-04 2026-03-03 Milwaukee Electric Tool Corporation Jigsaw

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