EP3297799B1 - Werkzeugmaschinentrennvorrichtung - Google Patents

Werkzeugmaschinentrennvorrichtung Download PDF

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Publication number
EP3297799B1
EP3297799B1 EP16707422.8A EP16707422A EP3297799B1 EP 3297799 B1 EP3297799 B1 EP 3297799B1 EP 16707422 A EP16707422 A EP 16707422A EP 3297799 B1 EP3297799 B1 EP 3297799B1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting strand
unit
pretensioning
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.)
Active
Application number
EP16707422.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3297799A1 (de
Inventor
Thomas Duerr
Petr Grulich
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 EP3297799A1 publication Critical patent/EP3297799A1/de
Application granted granted Critical
Publication of EP3297799B1 publication Critical patent/EP3297799B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B27B17/14—Arrangements for stretching the chain saw
    • 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
    • B27B17/02—Chain saws equipped with guide bar

Definitions

  • a machine tool separating device which comprises at least one cutting strand and at least one guide unit for guiding the cutting strand, which together with the cutting strand forms a closed system.
  • the known machine tool separating device is designed free of a torque transmission element.
  • the known machine tool separating device comprises at least one cutting strand tensioning unit arranged on the guide unit, which is provided to compensate for play and / or tolerance of the cutting strand.
  • the invention is based on a machine tool separating device, which is designed free of a torque transmission element, with at least one cutting strand and with at least one guide unit for guiding the cutting strand, which in particular forms a closed system together with the cutting strand.
  • the machine tool separating device comprises at least one pretensioning unit arranged on the guide unit, which is provided for automatic play and / or tolerance compensation of the cutting strand at least during a state of the guide unit removed from a coupling device of a portable machine tool.
  • “Free from a torque transmission element” is to be understood here in particular to mean that the machine tool separating device is designed to be decoupled from a torque transmission element, in particular a gearwheel.
  • the machine tool disconnecting device itself does not have a torque transmission element which is mounted on the guide unit and which engages in the cutting strand to drive the cutting strand.
  • the portable machine tool preferably has a torque transmission element which, when the machine tool separating device, in particular the guide unit, is arranged on the coupling device of the portable machine tool, engages in the cutting strand to drive the cutting strand.
  • the torque transmission element is preferably arranged on the coupling device of the portable machine tool, in particular arranged rotatably.
  • the torque transmission element can in particular be designed as a toothed shaft of a gear unit of the portable machine tool.
  • the torque transmission element can particularly preferably be designed as a gearwheel, in particular as a pinion.
  • a “coupling device” is to be understood here to mean, in particular, a device which is intended to effectively 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.
  • forces and / or torques can be transmitted from the gear unit of the portable machine tool to drive the cutting strand to the machine tool separating device, in particular by means of the torque transmission element of the portable machine tool.
  • the coupling device is preferably designed as a tool holder, in particular for receiving the machine tool separating device.
  • the coupling device can particularly preferably be designed as a bayonet catch.
  • a “cutting strand” is to be understood here in particular to mean a unit which is intended to locally remove atomic cohesion of a workpiece to be machined, in particular by means of mechanical cutting and / or by means of mechanical removal of material particles of the workpiece.
  • the cutting strand is preferably provided to separate the workpiece into at least two physically separate parts and / or at least partially material particles of the workpiece starting from a surface of the workpiece separate and / or remove.
  • the cutting strand is particularly preferably moved in a circumferential manner in at least one operating state, in particular along a circumferential direction of the guide unit of the machine tool separating device.
  • the cutting strand is particularly preferably designed as a cutting chain.
  • the cutting strand has a different configuration, such as, for example, a configuration as a cutting belt on which a plurality of cutting strand segments of the cutting strand are arranged.
  • the cutting strand preferably has a maximum dimension of less than 4 mm, viewed along a direction at least substantially perpendicular to a cutting plane of the cutting strand.
  • the maximum dimension is preferably designed as a cutting strand thickness.
  • the cutting strand viewed in the direction at least substantially perpendicular to the cutting plane of the cutting strand, has an at least substantially constant maximum cutting strand thickness along an overall length of the cutting strand.
  • the maximum cutting strand thickness preferably corresponds to a value from a value range of 1 mm to 3 mm along the entire length of the cutting strand.
  • the machine tool separating device viewed along an entire extent of the machine tool separating device, has an overall width which is less than 4 mm.
  • the cutting strand is preferably provided to produce a cutting gap which, viewed along the direction at least substantially perpendicular to the cutting plane of the cutting strand, has a maximum dimension of less than 4 mm.
  • a “guide unit” is to be understood here in particular as a unit which is intended to exert a constraining force on the cutting strand at least along a direction perpendicular to the cutting direction of the cutting strand in order to specify a possibility of movement of the cutting strand along the cutting direction.
  • the guide unit preferably has at least one guide element, in particular a guide groove, through which the cutting strand is guided.
  • the cutting strand viewed in the cutting plane of the cutting strand, is preferably guided along an entire circumference of the guide unit by the guide unit by means of the guide element, in particular the guide groove.
  • a “cutting direction” is to be understood here to mean in particular a direction along which the cutting strand for producing 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 driving force and / or a driving torque, in particular in the management unit.
  • the term "intended” is intended to define in particular specially designed and / or specially equipped.
  • the fact that an element and / or a unit is / is provided for a specific function should in particular be understood to mean that the element and / or the unit fulfill / fulfill this specific function in at least one application and / or operating state and / or execute / executes.
  • closed system here is intended in particular to define a system which comprises at least two components which, by means of an interaction in a removed state of the system, retain functionality from a system superior to the system, such as, for example, the portable machine tool, and / or which removed state are captively connected.
  • the at least two components of the closed system are preferably at least essentially permanently connected to one another for an operator.
  • “At least essentially insoluble” is to be understood here to mean in particular a connection of at least two components which can only be separated from one another with the aid of cutting tools, such as a saw, in particular a mechanical saw, etc. and / or chemical separating agents, such as solvents, etc. are.
  • the cutting strand can be tensioned and / or pretensioned by means of the pretensioning unit, in particular in a state of the cutting strand arranged on the guide unit.
  • the pretensioning unit is provided to compensate for a play-related play and / or a production-related tolerance, in particular in a state of the machine tool separating device that is removed from the coupling device.
  • the pretensioning unit is preferably provided to preferably automatically compensate for a play-related play and / or a production-related tolerance, in particular when the machine tool separating device is in a state removed from the coupling device.
  • the prestressing unit is particularly preferably provided to compensate for an elongation of the cutting strand, in particular an elongation of the cutting strand due to the machining of a workpiece.
  • the prestressing unit is particularly preferably provided to preferably automatically compensate for the elongation of the cutting strand, in particular an elongation of the cutting strand due to the machining of a workpiece.
  • the elongation of the cutting strand, in particular one caused by machining a workpiece Elongation of the cutting strand can preferably be automatically compensated by means of the pretensioning unit.
  • an "automatic play and / or tolerance compensation” is intended in particular to be an automatic, in particular free of operator intervention, lengthening compensation and / or an automatic, in particular free of operator intervention, compensation of a production-related game and / or a production-related tolerance of the cutting strand in a state arranged on the guide unit, by means of an action of at least one clamping force on the cutting strand, in particular by an element formed separately from the cutting strand.
  • the automatic tensioning and / or the automatic pre-tensioning of the cutting strand can / are particularly preferably accessible without intervention by an operator of the portable machine tool.
  • the cutting strand can advantageously be prevented from hanging out of the guide unit in a tension-free state when the guide unit is removed from the coupling device of the portable machine tool.
  • damage to the cutting strand can advantageously be prevented during repeated assembly of the guide unit on the portable machine tool. Repeated assembly of the guide unit on the portable machine tool can be achieved and / or facilitated particularly advantageously.
  • the pretensioning unit has at least one spring-elastic pretensioning element which is arranged on at least one movably mounted cutting strand holding element of the pretensioning unit.
  • the pretensioning unit has a single cutting strand holding element.
  • the cutting strand holding element is preferably provided for holding the cutting strand.
  • the cutting strand holding element is movably mounted, in particular in such a way that the cutting strand holding element is movable at least in the cutting plane of the cutting strand.
  • the cutting strand holding element is particularly preferably movably mounted in the cutting plane of the cutting strand along a longitudinal extent of the guide unit, in particular along a longitudinal axis of the guide unit.
  • the cutting strand holding element is arranged at one end of the guide unit, in particular on a drive side of the guide unit.
  • the biasing element is preferably provided for this purpose, in particular during the state of the machine tool separating device removed from the coupling device of the portable machine tool, with the cutting strand holding element to apply a force, in particular to automatically apply a force.
  • the biasing element can in particular be designed as a reversible, energy-converting element.
  • the prestressing element is preferably designed as a spring-elastic element.
  • the prestressing element is particularly preferably designed as a spring element, such as, for example, a spiral spring, an evolute spring, a plate spring or the like.
  • the prestressing element can also be designed as another element that appears useful to a person skilled in the art, such as a gas pressure spring, an oil pressure spring or a piezoactive element.
  • a gas pressure spring such as a gas pressure spring, an oil pressure spring or a piezoactive element.
  • the piezoactive element can be used in particular in interaction with a sensor for a coupling state of the machine tool separating device.
  • the pretensioning unit has at least one spring-elastic pretensioning element, which is supported at one end on at least one cutting strand holding element of the pretensioning unit and is supported on at least one coupling element of the guide unit with a further end.
  • the cutting strand holding element has a support surface on which the resilient biasing element is supported with one end.
  • the resilient biasing element preferably abuts the support surface with one end.
  • the support surface is preferably oriented at least substantially perpendicular to the cutting plane of the cutting strand.
  • a normal vector of the support surface preferably points at least substantially in a direction parallel to the longitudinal axis of the guide unit.
  • the support surface is arranged facing the guide unit on the cutting strand holding element.
  • the guide unit has a single coupling element.
  • the coupling element is provided for being positively and / or non-positively connected to the coupling device of the portable machine tool.
  • the coupling element is particularly preferably provided for, during a state of the guide unit arranged on the coupling device of the portable machine tool, the machine tool separating device, in particular the guide unit, against rotation and / or tilting upon transmission of forces and / or torques of the torque transmission element of the portable machine tool to the Cutting strand relative to the portable machine tool, in particular to secure a machine tool housing of the portable machine tool.
  • the coupling element is preferably arranged, viewed along the longitudinal axis of the guide unit of the machine tool separating device, at one end of the machine tool separating device, in particular on the drive side of the guide unit.
  • the prestressing unit preferably comprises at least one assembly opening, which is provided in particular to enable the spring-elastic prestressing element to be arranged in a functional position of the spring-elastic prestressing element in at least one largely assembled state of the prestressing unit.
  • the mounting opening is preferably arranged at least on the coupling element.
  • the mounting opening is preferably delimited by an edge region of the coupling element, the mounting opening being in particular introduced into the coupling element.
  • the resilient prestressing element can preferably be arranged in the functional position as a result of at least partially passing the prestressing element through the assembly opening. In the functional position, the resilient pretensioning element lies in particular at least on the cutting strand holding element and / or on the coupling element.
  • the resilient biasing element is preferably supported in the functional position, in particular with one end on the cutting strand holding element of the biasing unit and with the other end on the coupling element of the guide unit.
  • the resilient biasing element preferably exerts a force on the cutting strand holding element and the coupling element, which force is intended to move the cutting strand holding element relative to the coupling element.
  • the coupling element at least partially surrounds the cutting strand holding element.
  • the coupling element has at least one guide groove, which is provided for guiding the cutting strand holding element, preferably in a plane parallel to the cutting plane of the cutting strand, particularly preferably in a direction parallel to the longitudinal direction of the guide unit.
  • the guide groove preferably has a main course that runs at least substantially parallel to the cutting plane of the cutting strand.
  • the main course of the guide groove preferably runs at least substantially parallel to the longitudinal direction of the guide unit.
  • the guide groove is in particular delimited by at least one first boundary surface of the coupling element, which is oriented at least substantially parallel to the cutting plane of the cutting strand.
  • the guide groove is preferably bounded by at least one further boundary surface of the coupling element, which is oriented at least substantially perpendicular to the cutting plane of the cutting strand.
  • the coupling element is preferably arranged stationary on the guide unit of the machine tool separating device.
  • the coupling element and the cutting strand holding element are preferably movable relative to one another, in particular during a state of the machine tool separating device, in particular the guide unit, which is removed from the coupling device of the portable machine tool.
  • the coupling element and the cutting strand holding element are preferably movable relative to one another parallel to the cutting plane of the cutting strand.
  • the coupling element and the cutting strand holding element are particularly preferably movable relative to one another along the longitudinal axis of the guide unit of the machine tool separating device.
  • the coupling element and the cutting strand holding element are preferably moved relative to one another by means of a force of the resilient biasing element.
  • the coupling element and the cutting strand holding element can preferably be moved relative to one another free of a force of the resilient biasing element.
  • the pretensioning unit is arranged at least substantially mirror-symmetrically to a cutting plane of the cutting strand on the guide unit.
  • the guide unit particularly preferably comprises at least two outer surfaces which run at least substantially parallel to the cutting plane of the cutting strand.
  • the biasing element is arranged equally on both sides of the guide unit.
  • the individual cutting strand holding element is preferably arranged mirror-symmetrically to the cutting plane of the cutting strand on the guide unit.
  • the pretensioning unit has at least one cutting strand holding element in at least one embodiment.
  • the two cutting strand holding elements are particularly preferably arranged with respect to the cutting plane in mirror symmetry to one another on the guide unit, in particular between at least two coupling elements of the guide unit.
  • the individual coupling element is particularly preferably arranged mirror-symmetrically to the cutting plane of the cutting strand on the guide unit.
  • the guide unit in at least one embodiment, two coupling elements.
  • the two coupling elements are particularly preferably arranged on the guide unit in a mirror-symmetrical manner with respect to the cutting plane.
  • the pretensioning unit in particular in at least one embodiment of the machine tool separating device, comprises at least one cutting strand holding element, which delimits at least one holding recess of the pretensioning unit, which has a maximum width that is smaller than a maximum cutting strand thickness of the cutting strand.
  • the cutting strand holding element has at least one edge region delimiting the holding recess.
  • the maximum width of the holding recess is essentially limited by the cutting strand holding element of the pretensioning unit.
  • the maximum width of the holding recess preferably extends perpendicular to the cutting plane of the cutting strand.
  • the maximum width of the holding recess is arranged at least substantially mirror-symmetrically to the cutting plane of the cutting strand on the guide unit.
  • the maximum width of the holding recess is in particular less than 4 mm, preferably less than 3 mm and particularly preferably less than 1 mm.
  • the holding recess is preferably provided to hold the cutting strand, in particular during a state of the machine tool separating device that has been removed from the coupling device of the portable machine tool.
  • cutter carrier elements of the cutting strand are arranged at least partially in the holding recess, in particular during a state of the machine tool separating device removed from the coupling device of the portable machine tool.
  • Interlaced cutting elements of the cutting support elements of the cutting strand preferably rest against an edge region of the cutting strand holding element that delimits the holding recess, in particular during a state of the machine tool separating device that has been removed from the coupling device of the portable machine tool.
  • the cutting strand can advantageously be held on the cutting strand holding element.
  • tension-free hanging out of the cutting strand from the guide unit can be avoided particularly advantageously.
  • a particularly good one can be particularly advantageous and easy insertion of the torque transmission element of the coupling device of the portable machine tool can be achieved.
  • the pretensioning unit in particular in at least one embodiment of the machine tool separating device, comprise at least two cutting strand holding elements, which together limit a holding recess of the pretensioning unit, at least one spacing element of the pretensioning unit being arranged on at least one of the cutting strand holding elements to ensure a lead-through distance.
  • the lead-through distance is designed in particular as a width, preferably as the maximum width of the holding recess.
  • the lead-through distance extends at least substantially perpendicular to the cutting plane of the cutting strand.
  • the lead-through distance is provided in particular to enable an element, a component and / or a device to be able to pass through the cutting strand holding element.
  • the lead-through distance is preferably provided to enable the cutting strand of the machine tool separating device to be passed securely through the cutting strand holding element.
  • the spacer element of the pretensioning unit extends along a main direction of extension of the spacer element at least substantially perpendicular to the cutting plane of the cutting strand.
  • the spacer element is arranged at least essentially in a circular ring segment region of the cutting strand holding elements on one of the at least two cutting strand holding elements.
  • the circular ring segment region is arranged on a side facing away from the prestressing element on one of the at least two cutting strand holding elements.
  • the circular ring segment region extends along an angular region of less than 180 °, preferably less than 120 ° and particularly preferably less than 60 °.
  • the pretensioning unit has a single spacer element in at least one embodiment.
  • the pretensioning unit has a single spacer element, which in at least one embodiment is formed separately from a single cutting strand holding element.
  • the spacer element of the pretensioning unit is preferably arranged mirror-symmetrically to the cutting plane of the cutting strand on the guide unit.
  • the pretensioning unit preferably has two spacer elements, each of which is arranged on one of the at least two cutting strand holding elements.
  • the pretensioning unit preferably has two spacer elements, each of which is formed in one piece with one of the at least two cutting strand holding elements.
  • the spacing elements of the prestressing unit are mirror-symmetrical with respect to the cutting plane arranged to each other on the guide unit. A minimum lead-through distance can advantageously be ensured, as a result of which the cutting strand can be held securely.
  • the pretensioning unit has at least one force and / or positive locking element, which is provided to secure at least one cutting strand holding element of the pretensioning unit against movement in a cutting plane of the cutting strand.
  • the pretensioning unit particularly preferably has at least one force and / or form-locking element which is provided to secure at least two cutting strand holding elements of the pretensioning unit against movement in a cutting plane of the cutting strand, in particular to secure them relative to one another.
  • Each of the at least two cutting strand holding elements preferably has at least one force and / or positive locking element.
  • the respective force and / or positive locking element of one of the at least two cutting strand holding elements is designed to correspond to the at least respective positive and / or positive locking element of the other of the at least two cutting strand holding elements.
  • the force and / or form-locking element can be designed as an elevation or a depression.
  • the force and / or form-locking element of one of the cutting strand holding elements fixes the at least two cutting strand holding elements of the pretensioning unit to one another at least in a cutting plane of the cutting strand in a form-fitting and / or non-positive manner, in particular against movement in a cutting plane, by means of interaction with the force and / or Form-locking element of the other cutting strand holding element.
  • the force and / or positive locking element of at least one cutting strand holding element preferably engages in the correspondingly designed force and / or positive locking element of the other cutting strand holding element.
  • the at least one cutting strand holding element can advantageously be held in a position relative to at least one other element.
  • a movement of the at least two cutting strand holding elements can be synchronized during a movement along the longitudinal axis of the guide unit.
  • a machine tool system with at least one machine tool separating device according to the invention and with at least one portable machine tool proposed that has at least one coupling device for a positive and / or non-positive coupling with the machine tool separating device according to the invention.
  • a “portable machine tool” is to be understood here in particular to mean a machine tool, in particular a hand-held machine tool, which can be transported by an operator without a transport machine.
  • the portable machine tool in particular has a mass which is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg.
  • a machine tool system can advantageously be implemented in which an elongation of the cutting strand after use of the cutting strand for machining the workpiece can be compensated for, preferably automatically compensated for, in particular when the guide unit is in a state removed from the coupling device of the portable machine tool.
  • a machine tool system can advantageously be implemented, in which a production-related play and / or a production-related tolerance can be compensated for, preferably automatically, before using the cutting strand for machining the workpiece, in particular with one that is removed from the coupling device of the portable machine tool State of the leadership unit.
  • the cutting strand remains particularly advantageously subjected to tension due to the inventive design of the machine tool system.
  • damage to the cutting strand can advantageously be prevented during repeated assembly of the guide unit on the portable machine tool. Repeated assembly of the guide unit on the machine tool can advantageously be achieved and / or facilitated.
  • the machine tool system is particularly preferably designed such that the pretensioning unit has at least one cutting strand holding element which has at least one installation functional surface which is intended to cause at least one force component against a pretensioning force of the pretensioning element at least during an arrangement of the machine tool separation device on the coupling device.
  • the installation functional surface is arranged essentially perpendicular to the cutting plane of the cutting strand on the at least one cutting strand holding element.
  • a surface of the coupling device of the portable machine tool designed to correspond to the installation functional surface acts on the installation functional surface.
  • Force component is to be understood here in particular as a component that is part of a force vector.
  • the force component is in particular aligned parallel to the cutting plane of the cutting strand, preferably parallel to the longitudinal axis of the guide unit.
  • the force component is particularly preferably oriented counter to the pretensioning force, which in particular moves the cutting strand holding element in the cutting plane of the cutting strand along the longitudinal axis of the guide unit.
  • the machine tool separating device according to the invention and / or the machine tool system according to the invention should / should not be limited to the application and embodiment described above.
  • the machine tool separating device according to the invention and / or the machine tool system according to the invention can have a number that differs from a number of individual elements, components and units specified here in order to fulfill a function described here.
  • values lying within the limits mentioned are also to be regarded as disclosed and to be used as desired.
  • FIG. 1 shows a portable machine tool 20 with a machine tool separating device 10, which together form a machine tool system.
  • the portable machine tool 20 has at least one coupling device 18 for a positive and / or non-positive coupling with the machine tool separating device 10.
  • the coupling device 18 can in this case be designed as a bayonet lock, snap lock and / or as another coupling device that appears reasonable to a person skilled in the art.
  • the portable machine tool 20 has at least one torque transmission element 56.
  • the torque transmission element 56 can be designed as a gear, in particular as a pinion.
  • the machine tool separating device 10 comprises at least one cutting strand 12 and at least one guide unit 14 for guiding the cutting strand 12.
  • the guide unit 14 forms a closed system together with the cutting strand 12.
  • the torque transmission element 56 engages the cutting strand 12 directly to drive the cutting strand 12.
  • the portable machine tool 20 has a machine tool housing 60 which encloses a drive unit 62 and a gear unit 64 of the portable machine tool 20.
  • the drive unit 62 and the gear unit 64 are operatively connected to one another in a manner already known to a person skilled in the art in order to generate a drive torque that can be transmitted to the machine tool separating device 10.
  • the gear unit 64 is preferably designed as an angular gear.
  • the drive unit 62 is preferably designed as an electric motor unit.
  • the drive unit 62 and / or the gear unit 64 have another configuration which appears to be useful to a person skilled in the art, such as, for example, an embodiment of the gear unit 64 as a worm gear, etc.
  • the drive unit 62 is provided to drive the cutting strand 12 of the machine tool separating device 10 in at least one operating state via the gear unit 64.
  • the cutting strand 12 is moved in the guide unit 14 of the machine tool separating device 10 along a cutting direction 66 of the cutting strand 12 in the guide unit 14, in particular relative to the guide unit 14.
  • FIG. 2 shows the machine tool disconnecting device 10 in a state removed from the coupling device 18 of the portable machine tool 20.
  • the machine tool separating device 10 is designed free of a torque transmission element 56.
  • the machine tool separating device 10 has the cutting strand 12 and the guide unit 14, which together form a closed system.
  • the cutting strand 12 is guided by means of the guide unit 14.
  • the guide unit 14 has at least one guide element (not shown here) designed as a guide groove, by means of which the cutting strand 12 is guided.
  • the cutting strand 12 is guided by means of edge regions of the guide unit 14 delimiting the guide groove.
  • the cutting strand 12 further comprises a plurality of interconnected cutting support elements 68, which form the cutting strand 12 designed as a cutting chain.
  • the machine tool separating device 10 further comprises at least one pretensioning unit 16 arranged on the guide unit 14, which is provided for automatic play and / or tolerance compensation of the cutting strand 12, at least during a state of the guide unit 14 removed from the coupling device 18 of the portable machine tool 20.
  • the biasing unit 16 is at least partially arranged on a drive side 70 of the guide unit 14.
  • the biasing unit 16 is arranged at least substantially mirror-symmetrically to the cutting plane 58 of the cutting strand 12 on the guide unit 14.
  • the guide unit 14 comprises at least one coupling element 32 arranged on the guide unit 14.
  • the coupling element 32 is arranged on an outer surface 72 of the guide unit 14.
  • the guide unit 14 comprises at least one further coupling element 34 arranged on the guide unit 14 ( Figure 3 ).
  • the further coupling element 34 is arranged on a further outer surface 74 of the guide unit 14, which runs at least substantially parallel to the outer surface 72.
  • the coupling element 32 and the further coupling element 34 are arranged essentially mirror-symmetrically to one another on the guide unit 14 in relation to the cutting plane 58 of the cutting strand 12 ( Figure 3 ).
  • the guide unit 14 has, as an alternative to the coupling element 32 and to the further coupling element 34, a single coupling element, which is preferably arranged mirror-symmetrically to the cutting plane 58 of the cutting strand 12 on the guide unit 14 and in particular has all the features of the coupling element 32 and the further coupling element 34.
  • the guide unit 14, in particular the machine tool separating device 10, is particularly preferred by means of the coupling element 32 and by means of the further coupling element 34 against rotation due to a transmission of torques by the torque transmission element 56 of the portable machine tool 20 during a state arranged on the coupling device 18 of the portable machine tool 20 secured.
  • the pretensioning unit 16 comprises at least one cutting strand holding element 24 arranged on the guide unit 14.
  • the cutting strand holding element 24 is at least partially surrounded by the coupling element 32.
  • the pretensioning unit 16 comprises at least one further cutting strand holding element 26 arranged on the guide unit 14 ( Figure 3 ).
  • the further cutting strand holding element 26 is at least partially surrounded by the further coupling element 34.
  • the pretensioning unit 16 comprises at least one assembly opening 76, which is provided for simple assembly of a spring-elastic pretensioning element 22 of the pretensioning unit 16 on the pretensioning unit 16.
  • the pretensioning unit 16 comprises at least one further mounting opening 78, which is provided for easy mounting of the spring-elastic pretensioning element 22 on the pretensioning unit 16.
  • the mounting opening 76 is preferably arranged on the coupling element 32.
  • the further assembly opening 78 is preferably arranged on the further coupling element 34.
  • the mounting opening 76 is delimited by at least one edge region of the coupling element 32.
  • the further assembly opening 78 is delimited by at least one edge region of the further coupling element 34.
  • the resilient biasing element 22 is on the coupling element 32 and can be arranged on the further coupling element 34.
  • the resilient biasing element 22 can be arranged in a functional position on the biasing unit 16 by insertion through at least one of the assembly openings 76, 78.
  • the prestressing element 22 bears at least partially on the edge region of the coupling element 32 delimiting the mounting opening 76 and on the edge region of the further coupling element 34 delimiting the further mounting opening 78.
  • the pretensioning element 22 lies at least partially on the cutting strand holding element 24 and on the further cutting strand holding element 26.
  • the cutting strand holding element 24 and the further cutting strand holding element 26 are arranged on the guide unit 14 essentially mirror-symmetrically with respect to the cutting plane 58 of the cutting strand 12.
  • the pretensioning unit 16 has an individual cutting strand holding element as an alternative to the cutting strand holding element 24 and to the further cutting strand holding element 26, which is preferably arranged mirror-symmetrically to the cutting plane 58 of the cutting strand 12 on the guide unit 14 and in particular has all the features of the cutting strand holding element 24 and the further cutting strand holding element 26.
  • the cutting strand holding element 24 and the further cutting strand holding element 26 are movably arranged on the guide unit 14.
  • the cutting strand holding element 24 and the further cutting strand holding element 26 are mounted so as to be translationally movable relative to the guide unit 14.
  • the cutting strand holding element 24 and the further cutting strand holding element 26 are mounted so as to be translationally movable relative to the coupling element 32 and to the further coupling element 34.
  • the coupling element 32 has at least one guide groove 84, which is provided for guiding the cutting strand holding element 24 in a direction parallel to the longitudinal direction of the guide unit 14.
  • the further coupling element 34 has at least one further guide groove 86, which is provided for guiding the further cutting strand holding element 26 in a direction parallel to the longitudinal direction of the guide unit 14.
  • the coupling element 32 and / or the further coupling element 34 alternatively to the guide groove 84, 86 have / has a guide extension which is provided for guiding the cutting strand holding element 24 and / or the further cutting strand holding element 26, in particular as a result of cooperation with a guide groove arranged on the cutting strand holding element 24 and / or on the further cutting strand holding element 26.
  • the pretensioning unit 16 alternatively to the cutting strand holding element 24 and to the further cutting strand holding element 26 has a single cutting strand holding element which can be guided in the guide groove 84 and / or the further guide groove 86.
  • the pretensioning unit 16 has at least one spring-elastic pretensioning element 22 which is arranged on at least one of the movably mounted cutting strand holding elements 24, 26 of the pretensioning unit 16 ( Figure 3 ).
  • the at least one resilient biasing element 22 of the biasing unit 16 is arranged on both movably mounted cutting strand holding elements 24, 26 of the biasing unit 16. It is also conceivable that in an exemplary embodiment of the machine tool separating device 10, which is not shown here in detail, the at least one spring-elastic pretensioning element 22 of the pretensioning unit 16 is arranged on a single movably mounted cutting strand holding element of the pretensioning unit 16.
  • the two movably mounted cutting strand holding elements 24, 26 hold the cutting strand 12 in a tensioned state when the guide unit 14 is removed from the coupling device 18 of the portable machine tool 20.
  • the cutting strand holding elements 24, 26 delimit a holding recess 36 of the pretensioning unit 16 by means of an edge region.
  • entangled cutting elements of the cutting strand 12 lie against the edge region ( Figure 3 ).
  • the cutting elements are arranged on the cutting support elements 68 of the cutting strand 12 and in particular are formed in one piece with the cutting support elements 68.
  • the cutting support elements 68 engage in the holding recess 36 of the pretensioning unit 16 in order to hold the cutting strand 12.
  • the spring-elastic biasing element 22 is in this embodiment ( Figures 2 to 4 ) designed as a spiral spring.
  • the resilient biasing element 22 is designed as another element that appears to be useful to a person skilled in the art, such as, for example, a leg spring, a plate spring, an air spring, a piston, a piezoactive element, etc.
  • the at least two cutting strand holding elements 24, 26 together delimit the holding recess 36 of the pretensioning unit 16, at least one spacer element 42, 44 of the pretensioning unit 16 being arranged on at least one of the cutting strand holding elements 24, 26 to ensure a lead-through distance 46.
  • the passage distance 46 corresponds to a maximum width 38 of the holding recess 36.
  • the lead-through distance 46 extends at least substantially perpendicular to the cutting plane 58 of the cutting strand 12.
  • the lead-through distance 46 is arranged in mirror symmetry with respect to the cutting plane 58 of the cutting strand 12.
  • At least one spacer element 42 and a further spacer element 44 to ensure the passage distance 46 are each arranged on at least one of the cutting strand holding elements 24, 26.
  • the spacer element 42 and the further spacer element 44 are arranged with respect to the cutting plane 58 of the cutting strand 12 in mirror symmetry to one another on one of the at least two cutting strand holding elements 24, 26.
  • One of the spacer elements 42, 44 is arranged on each of the cutting strand holding elements 24, 26.
  • the spacer element 42 and the further spacer element 44 are arranged in a circular ring segment region of the at least two cutting strand holding elements 24, 26 on the respective one of the at least two cutting strand holding elements 24, 26.
  • the pretensioning unit 16 has, as an alternative to the spacer element 42 and to the further spacer element 44, a single spacer element which is arranged on at least one of the cutting strand holding elements 24, 26 to ensure a passage distance 46 and in particular has all the features of the spacer 42 and the further spacer 44.
  • At least one of the cutting strand holding elements 24, 26 delimits at least the holding recess 36 of the pretensioning unit 16, which has the maximum width 38, which is smaller than a maximum cutting strand thickness 40 of the cutting strand 12.
  • the maximum width 38 extends at least substantially perpendicular to the cutting plane 58 of the Cutting strand 12.
  • the maximum cutting strand thickness 40 of the cutting strand 12 corresponds at least essentially to a maximum width of the cutting support elements 68.
  • the pretensioning unit 16 has at least the spring-elastic pretensioning element 22, which is supported with one end 28 on at least one of the cutting strand holding elements 24, 26 of the pretensioning unit 16 and with another end 30 supports at least one of the coupling elements 32, 34 of the guide unit 14 (FIGS. 2 and 3).
  • the cutting strand holding element 24 has a support surface 80 on which the spring-elastic biasing element 22 is supported with the end 28.
  • the further cutting strand holding element 26 has a further support surface 82 on which the spring-elastic biasing element 22 is supported with the end 28.
  • the end 28 of the resilient biasing element 22 abuts on the support surfaces 80, 82.
  • the support surface 80 is arranged on a side of an end piece of the cutting strand holding element 24 facing the guide unit 14 on the cutting strand holding element 24.
  • the further support surface 82 is preferably arranged on a side of an end piece of the further cutting strand holding element 26 facing the guide unit 14 on the further cutting strand holding element 26.
  • the resilient biasing element 22 is designed as a spring element, in particular as a spiral spring. The biasing element 22 abuts the support surfaces 80, 82 with one turn of the spring element. It is also conceivable that in an embodiment not shown here, in which the machine tool separating device 10 has a single cutting strand holding element, which preferably has a single supporting surface on which the resilient biasing element 22 is supported at one end.
  • the translating-movable cutting strand holding elements 24, 26 can be automatically moved relative to the coupling elements 32, 34 and the guiding unit 14 during a state of the guiding unit 14 removed from the coupling device 18 of the portable machine tool 20, so that the cutting strand 12 is automatically in a tensioned state and thus there is automatically a play and / or tolerance compensation of the cutting strand 12.
  • Entangled cutting elements of the cutting support elements 68 of the cutting strand 12 lie against the edge regions of the cutting strand holding elements 24, 26 which delimit the holding recess 36, in particular in order to enable the cutting strand 12 to be held in an assembly position.
  • the cutting strand 12 is brought into a tensioned state.
  • the pretensioning unit 16 has at least one non-positive and / or form-locking element 48, 50 which is provided to secure at least one of the cutting strand holding elements 24, 26 of the pretensioning unit 16 against movement in a cutting plane 58 of the cutting strand 12.
  • the biasing unit 16 at least has a non-positive and / or positive locking element 48, 50 which fixes at least two cutting strand holding elements 24, 26 of the pretensioning unit 16 to one another in a positive and / or non-positive manner at least in a cutting plane 58 of the cutting strand 12.
  • Each of the at least two cutting strand holding elements 24, 26 preferably has at least one force and / or positive locking element 48, 50.
  • the force and / or positive locking element 48 of the cutting strand holding element 24 is designed to correspond to the force and / or positive locking element 50 of the cutting strand holding element 26.
  • the force and / or positive locking element 48 of the cutting strand holding element 24 is preferably designed as an elevation.
  • the force and / or positive locking element 50 of the cutting strand holding element 26 is preferably designed as a depression.
  • the force and / or positive locking element 48 of the cutting strand holding element 24 interacts with the correspondingly designed force and / or positive locking element 50 of the cutting strand holding element 26.
  • At least one of the cutting strand holding elements 24, 26 has at least one installation functional surface 52, 54 which is provided to cause at least one force component against a force of the biasing element 22 at least during an arrangement of the machine tool separating device 10 on the coupling device 18.
  • both cutting strand holding elements 24, 26 each have at least one installation functional surface 52, 54, which is provided to cause at least one force component against a biasing force of the biasing element 22 at least during an arrangement of the machine tool separating device 10 on the coupling device 18.
  • the installation functional surfaces 52, 54 run at least substantially perpendicular to the cutting plane 58 of the cutting strand 12 on the respective cutting strand holding elements 24, 26.
  • the installation functional surfaces 52, 54 are arranged on the end of the cutting strand holding elements 24, 26 on the cutting strand holding elements 24, 26 at an end remote from the resilient biasing element 22 .
  • the machine tool separating device 10 is arranged on the coupling device 18 of the portable machine tool 20
  • at least one surface of the coupling device 18 of the portable machine tool 20 designed to correspond to the installation functional surfaces 52, 54 interacts with the installation functional surfaces 52, 54.
  • a force directed against a force generated by the prestressing element 22 can be exerted on the cutting strand holding elements 24, 26.
  • the cutting strand holding elements 24, 26 are moved relative to the guide unit 14.
  • the cutting strand holding elements 24, 26 can be moved starting from the drive side 70 of the guide unit 14 in the direction of a side of the guide unit 14 facing away from the drive side 70, in particular along a direction running at least substantially parallel to the longitudinal axis of the guide unit 14.
  • the interleaved cutting elements are at least substantially non-contact with the cutting strand holding elements 24, 26, in particular with the edge regions of the cutting strand holding elements 24, 26 delimiting the holding recess 36.
  • a tensioned state of the cutting strand 12 for machining a workpiece is achieved by a clamping device of the portable machine tool 20.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Sawing (AREA)
EP16707422.8A 2015-05-22 2016-03-01 Werkzeugmaschinentrennvorrichtung Active EP3297799B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015209408.1A DE102015209408A1 (de) 2015-05-22 2015-05-22 Werkzeugmaschinentrennvorrichtung
PCT/EP2016/054281 WO2016188645A1 (de) 2015-05-22 2016-03-01 Werkzeugmaschinentrennvorrichtung

Publications (2)

Publication Number Publication Date
EP3297799A1 EP3297799A1 (de) 2018-03-28
EP3297799B1 true EP3297799B1 (de) 2020-05-20

Family

ID=55451180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16707422.8A Active EP3297799B1 (de) 2015-05-22 2016-03-01 Werkzeugmaschinentrennvorrichtung

Country Status (5)

Country Link
US (1) US10406714B2 (zh)
EP (1) EP3297799B1 (zh)
CN (1) CN107666993B (zh)
DE (1) DE102015209408A1 (zh)
WO (1) WO2016188645A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015209408A1 (de) * 2015-05-22 2016-11-24 Robert Bosch Gmbh Werkzeugmaschinentrennvorrichtung
US10172292B2 (en) 2016-10-17 2019-01-08 Robert Bosch Gmbh Cutting device
USD1002306S1 (en) * 2021-04-23 2023-10-24 Zhejiang Safun Industrial Co., Ltd. Chain saw
JP1710810S (ja) * 2021-07-02 2022-03-25 携帯用電気チェーンソー本体

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GB806857A (en) * 1956-08-27 1958-12-31 Austin Hoy & Co Ltd Improvements in or relating to jibs for coal cutters
US3636995A (en) * 1970-07-02 1972-01-25 Textron Inc Tensioner for saw chain
DE4219956C2 (de) * 1992-06-18 2000-03-30 Stihl Maschf Andreas Schneideinrichtung für eine Motorkettensäge
JPH10119002A (ja) * 1996-10-24 1998-05-12 Makita Corp チェーンソーにおけるチェーンの張り装置
FI115706B (fi) * 1999-05-27 2005-06-30 Ponsse Oyj Ketjusaha
US7287330B1 (en) * 2004-09-29 2007-10-30 G&R Equipment, Llc Chain saw automatic tensioner
DE202006002709U1 (de) * 2006-02-17 2007-06-28 Dolmar Gmbh Zweiteilige Schiene für Motorkettensäge
FR2912949B1 (fr) * 2007-02-26 2009-04-24 Pellenc Sa Scie a chaine munie d'un dispositif de reglage de la tension de la chaine de coupe
US20110314682A1 (en) * 2009-03-18 2011-12-29 Markus Maag Quick-tightening device for a chain saw and chain unit for same
WO2012169943A1 (en) * 2011-06-07 2012-12-13 Gardena Manufacturing Gmbh A quick-action chain tensioning device for a chainsaw, and such mechanism and method
DE102012215461A1 (de) 2012-06-28 2014-01-02 Robert Bosch Gmbh Werkzeugmaschinentrennvorrichtung
DE102012211096A1 (de) * 2012-06-28 2014-01-16 Robert Bosch Gmbh Werkzeugkopplungsvorrichtung
DE102012211094A1 (de) * 2012-06-28 2014-01-02 Robert Bosch Gmbh Werkzeugkopplungsvorrichtung
US9381666B1 (en) * 2013-04-23 2016-07-05 Andrew M. Moody Automatic chainsaw tensioning device
DE102015209408A1 (de) * 2015-05-22 2016-11-24 Robert Bosch Gmbh Werkzeugmaschinentrennvorrichtung
US9669563B2 (en) * 2015-05-26 2017-06-06 Jenn Feng New Energy Co., Ltd. Chain saw with tool-free chain tension adjustment mechanism

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Also Published As

Publication number Publication date
EP3297799A1 (de) 2018-03-28
DE102015209408A1 (de) 2016-11-24
US10406714B2 (en) 2019-09-10
US20180079102A1 (en) 2018-03-22
CN107666993B (zh) 2020-08-11
WO2016188645A1 (de) 2016-12-01
CN107666993A (zh) 2018-02-06

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