EP2866987B1 - Werkzeugkopplungsvorrichtung - Google Patents

Werkzeugkopplungsvorrichtung Download PDF

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Publication number
EP2866987B1
EP2866987B1 EP13722447.3A EP13722447A EP2866987B1 EP 2866987 B1 EP2866987 B1 EP 2866987B1 EP 13722447 A EP13722447 A EP 13722447A EP 2866987 B1 EP2866987 B1 EP 2866987B1
Authority
EP
European Patent Office
Prior art keywords
tool
movement
unit
coupling device
tool holding
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
EP13722447.3A
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German (de)
English (en)
French (fr)
Other versions
EP2866987A1 (de
Inventor
Jens Zieger
Uwe Engelfried
Petr Grulich
Thomas Duerr
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2866987A1 publication Critical patent/EP2866987A1/de
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Publication of EP2866987B1 publication Critical patent/EP2866987B1/de
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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

  • Tool coupling devices for receiving a machine tool separating device designed as a closed system which have a cutting strand clamping unit for generating a cutting strand clamping force and a tool holding unit which comprises a movably mounted tool holding element.
  • WO2010 / 105809 discloses a tool coupling device according to the preamble of claim 1.
  • the invention relates to a tool coupling device for receiving a machine tool separating device, in particular a machine tool separating device designed as a closed system, with at least one cutting strand clamping unit for generating a cutting strand clamping force and with at least one tool holding unit which comprises at least one movably mounted tool holding element.
  • the tool coupling device comprises at least one movement coupling unit, via which the tool holding element can be coupled to the clamping element to move a clamping element of the cutting strand clamping unit.
  • the clamping element is preferably connected to the tool holding element in a movement-dependent manner via the movement coupling unit in at least one direction of movement.
  • the tool holding element preferably exerts a clamping force in the direction of the base body on a guide unit of the machine tool separating device.
  • the machine tool separating device is preferably received by the tool coupling device to transmit drive forces to the machine tool separating device or is fixed to the base body of the tool coupling device.
  • the tool holding element preferably exerts a holding force on the machine tool separating device at least in one state, in particular in at least one state of the machine tool separating device connected to the tool coupling device.
  • the tool holding element fixes the machine tool separating device preferably by means of a positive connection and / or by means of a non-positive connection to the base body of the tool coupling device.
  • the tool holding element is particularly preferably provided for generating a holding force in at least one tool fixing position of the tool holding element.
  • the tool holding element is provided for actuating the cutting strand tensioning unit by means of the movement coupling unit.
  • the tool holding element is preferably pivotally mounted about an axis of movement of the tool holding element which runs at least substantially parallel to a main plane of extension of the tool holding element.
  • "Essentially parallel” is to be understood here to mean in particular an orientation of a direction relative to a reference direction, in particular in a plane, the direction relative to the reference direction being a deviation in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
  • the term “main extension plane” is intended in particular to define a plane in which the tool holding element has a maximum extension.
  • the tool holding element can preferably be pivoted by a pivot angle which is in particular greater than 5 °, preferably greater than 45 ° and particularly preferably greater than 75 °.
  • the main extension plane of the tool holding element preferably extends at least substantially parallel to an axis of rotation of a in the base body of a tool holding element pivoted completely into an opening position Tool coupling device rotatably mounted drive elements.
  • the axis of movement of the tool holding element preferably runs at least substantially perpendicular to the axis of rotation of the drive element of the tool coupling device or a portable machine tool which is rotatably mounted in the base body of the tool coupling device and which comprises the tool coupling device.
  • the expression “substantially perpendicular” is intended here to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, viewed in particular in one plane, enclosing an angle of 90 ° and the angle a maximum deviation of in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
  • the tool holding element is preferably rotatably mounted about an axis of movement of the tool holding element that is at least substantially perpendicular to a main extension plane of the tool holding element.
  • the main extension plane of the tool holding element preferably extends at least substantially perpendicular to the axis of rotation of the drive element.
  • cutting strand tensioning unit is intended here in particular to define a unit which is intended to exert a tensioning force on the cutting strand to tension or pretension a cutting strand of the machine tool separating device at least in a state of the machine tool separating device connected to the tool coupling device.
  • the clamping element is preferably movably mounted on the base body of the tool coupling device relative to the base body of the tool coupling device.
  • the tensioning element is particularly preferably mounted on the base body such that it can be moved in translation.
  • the expression “mounted in a translationally movable manner” is intended here in particular to define a mounting of a unit and / or an element relative to at least one further unit and / or a further element, the unit and / or the element, in particular uncoupled from elastic deformation of the unit and / or the element and decoupled from movement possibilities caused by a bearing play, a movement possibility along at least one axis along a distance greater than 1 mm, preferably greater than 5 mm and particularly preferably greater than 10 mm.
  • a tool coupling device that is easy to operate can advantageously be achieved.
  • An automatic clamping process can be advantageous by means of the cutting strand tensioning unit by actuating the tool holding element.
  • a holding force for fixing a machine tool separating device to the base body of the tool coupling device and, at the same time, a tension of a cutting strand of the machine tool separating device fixed to the tool coupling device can thus advantageously be achieved.
  • the movement coupling unit has at least one link element for a movement of the clamping element as a result of a movement of the tool holding element.
  • a “link element” is to be understood here to mean in particular an element which has at least one recess, in particular a groove, into which a further element corresponding to the element engages and / or which has at least one extension which extends into a recess of a engages the further element corresponding to the element, with a movement of the element causing the further element to move in dependence on a geometric shape of the recess.
  • the backdrop element is preferably designed as a backdrop disk or as a backdrop translation element.
  • the tensioning element preferably engages in the recess of the link element.
  • the movement coupling unit preferably has at least one spring element which is provided to apply a spring force to the tensioning element and / or the link element.
  • a “spring element” is to be understood in particular to mean a macroscopic element which has at least two spaced ends which, in a normal operating state, can be moved elastically relative to one another along a movement path, the movement path being at least greater than 0.5 mm, in particular being greater than 1 mm, preferably greater than 2 mm and particularly advantageously greater than 3 mm, and this in particular generates a counterforce which counteracts the change and is dependent on an elastic movement of the ends relative to one another and preferably proportional to the elastic movement of the ends .
  • a “macroscopic element” is to be understood in particular to mean an element with an extension of at least 1 mm, in particular of at least 5 mm and preferably of at least 10 mm.
  • the spring element can be designed as a tension spring, a compression spring, a torsion spring, a spiral spring, etc.
  • the spring element is particularly preferably designed as a helical compression spring or as a leg spring.
  • the spring element it is also conceivable for the spring element to be a different one that appears to be useful to a person skilled in the art Has configuration.
  • the link element be mounted so as to be translationally movable.
  • the link element preferably has an axis of movement which is at least substantially perpendicular to the axis of rotation of the drive element.
  • the link element is preferably guided in a translatory manner by two linear guide elements of the motion coupling unit that run at least substantially parallel to one another. Precise guidance of the link element can advantageously be achieved by means of the configuration of the tool coupling device according to the invention.
  • the link element is rotatably mounted.
  • the link element preferably has an axis of movement which runs at least substantially parallel to the axis of rotation of the drive element.
  • a flat-construction motion coupling unit can advantageously be achieved.
  • a compact tool coupling device can thus advantageously be achieved.
  • the movement coupling unit comprises at least one lever element, via which the tool holding element can be coupled to a link element of the movement coupling unit to move the clamping element.
  • a “lever element” is to be understood here in particular to mean an element which is mounted so as to be pivotable at least about an axis of movement of the element and, in particular, has a maximum extent along a direction which is at least substantially perpendicular to the axis of movement in order to form at least one lever arm.
  • the lever element is preferably designed as a two-sided lever element, which, viewed from the axis or a pivot point in two opposite directions, forms a load arm and a force arm.
  • the movement coupling unit has a plurality of lever elements which interact with one another or with one another to move the clamping element as a result of a movement of the tool holding element are connected.
  • a force translation can advantageously be generated for a movement of the tensioning element.
  • a low operating force of an operator for operating the tool holding element can advantageously be translated into a large operating force of the clamping element.
  • the movement coupling unit comprises at least one eccentric element which is formed in one piece with the tool holding element.
  • An “eccentric element” is to be understood here to mean in particular an element which is pivotably mounted at least about an axis of movement of the element, a center, in particular a center of symmetry, of the element being arranged outside the axis of movement.
  • the eccentric element can be directly or indirectly coupled to the tensioning element.
  • one-piece is to be understood in particular to be understood to be at least integrally bonded, for example by means of a welding process, an adhesive process, a gating process and / or another process which seems sensible to a person skilled in the art, and / or advantageously to be formed in one piece, for example by a Manufactured from one casting and / or by manufacturing in a one- or multi-component injection molding process and advantageously from a single blank.
  • a movement conversion of a movement of the operating element into a movement of the tensioning element can advantageously be generated.
  • the tool holding unit comprises at least one fixing element which is provided to fix the tool holding element in at least one position.
  • the fixing element is preferably pivotally mounted.
  • the fixing element it is also conceivable for the fixing element to be mounted so as to be translationally movable.
  • a lever principle can advantageously be used to actuate the fixing element. A fixing element which is easy to use can thus be achieved.
  • the invention is based on a portable machine tool with a tool coupling device according to the invention.
  • the tool coupling device is preferred for positive and / or non-positive coupling provided with a machine tool separating device.
  • 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 portable machine tool can advantageously be achieved, on which a machine tool separating device can be arranged particularly comfortably.
  • the invention is based on a machine tool system with a machine tool according to the invention and a machine tool separating device which has at least one cutting strand and at least one guide unit which, together with the cutting strand, forms a closed system.
  • 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 separation 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 to at least partially separate and / or remove material particles of the workpiece starting from a surface of the workpiece.
  • the cutting strand is preferably designed as a cutting chain.
  • the cutting strand has a different configuration that appears to be useful to a person skilled in the art, such as, for example, a configuration as a cutting cord, on which cutting elements are fixed.
  • the term “guide unit” is intended here to define a unit which is intended to exert a constraining force on the cutting strand at least along a direction perpendicular to a cutting direction of the cutting strand in order to specify a possibility of movement of the cutting strand along the cutting direction.
  • 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, especially in the management unit.
  • the cutting strand is preferably moved in an operating state along the cutting direction relative to the guide unit.
  • the term "closed system” is intended in particular to define a system that comprises at least two components which, by means of interaction in a disassembled state of the system, maintain functionality from a system superior to the system, in particular the tool coupling device, and / or which are captively connected to one another in the disassembled state.
  • 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 are only carried out with the aid of cutting tools, such as a saw, in particular a mechanical saw, etc., and / or chemical release agents, such as solvents, etc. , are separable from each other.
  • the machine tool separating device has, in particular, viewed along a direction running at least substantially perpendicular to a cutting plane of the machine tool separating device, a maximum dimension of less than 10 mm, preferably less than 8 mm and particularly preferably less than 5 mm.
  • the dimension is preferably designed as the width of the machine tool separating device.
  • the machine tool separating device viewed along the direction at least substantially perpendicular to the cutting plane of the machine tool separating device, has an at least substantially constant maximum dimension along an entire length of the machine tool separating device.
  • the machine tool separating device is preferably provided to generate a cutting gap which, viewed along the direction at least substantially perpendicular to the cutting plane of the machine tool separating device, has a maximum dimension of less than 5 mm.
  • the tool coupling device according to the invention, the portable machine tool according to the invention and / or the machine tool system according to the invention should not be limited to the application and embodiment described above.
  • Tool coupling device, the portable machine tool according to the invention and / or the machine tool system according to the invention have a number that differs from a number of individual elements, components and units mentioned here to fulfill a function described here.
  • Figure 1 shows a portable machine tool 32a with a machine tool separating device 12a arranged on a tool coupling device 10a of the portable machine tool 32a.
  • the portable machine tool 32a and the machine tool separating device 12a together form a machine tool system.
  • the machine tool separating device 12a comprises at least one cutting strand 34a and at least one guide unit 36a for guiding the cutting strand 34a.
  • the guide unit 36a and the cutting strand 34a together form a closed system.
  • the machine tool separating device 12a is thus designed as a closed system.
  • the portable machine tool 32a has the tool coupling device 10a for the positive and / or non-positive coupling of the machine tool separating device 12a.
  • the tool coupling device 10a is provided for receiving the machine tool separating device 12a designed as a closed system.
  • the tool coupling device 10a comprises at least one cutting strand clamping unit 14a for generating a cutting strand clamping force and at least one tool holding unit 16a which comprises at least one movably mounted tool holding element 18a.
  • the portable machine tool 32a has a machine tool housing 38a, which encloses a drive unit 40a and an output gear unit 42a of the portable machine tool 32a.
  • the drive unit 40a and the output gear unit 42a are operatively connected to one another in order to generate a drive torque which can be transmitted to the machine tool separating device 12a in a manner already known to a person skilled in the art.
  • the output gear unit 42a is designed as an angular gear.
  • the drive unit 40a is designed as an electric motor unit.
  • the drive unit 40a and / or the output gear unit 42a have a different configuration that appears to be useful to a person skilled in the art, such as, for example, an embodiment of the drive unit 40a as a hybrid drive unit or as a combustion drive unit etc. and / or an embodiment of the output gear unit 42a as Worm gear, etc.
  • the drive unit 40a is provided to drive the cutting strand 34a of the machine tool separating device 12a in at least one operating state via the output gear unit 42a.
  • the cutting strand 34a in the guide unit 36a of the machine tool separating device 12a is moved along a cutting direction 44a of the cutting strand 34a relative to the guide unit 36a.
  • FIG. 2 shows the tool coupling device 10a in a state disassembled from the portable machine tool 32a.
  • the tool coupling device 10a comprises a base body 46a, which is rotatably mounted in a connection housing 48a of the tool coupling device 10a.
  • the base body 46a is in this case rotatably mounted about an axis of rotation 50a of a drive element 52a of the tool coupling device 10a in the connection housing 48a.
  • the connection housing 48a is fixed to the machine tool housing 38a of the portable machine tool 32a when the tool coupling device 10a is mounted on the portable machine tool 32a.
  • the tool coupling device 10a has at least one rotational positioning unit 54a.
  • the rotary positioning unit 54a in this case comprises at least one positioning element 56a for fixing the base body 46a in a position relative to the connection housing 48a.
  • the positioning element 56a is in this case designed as a spring-loaded locking pin which interacts with positioning recesses (not shown in more detail here) of the base body 46a in a manner already known to a person skilled in the art.
  • the rotary positioning unit 54a it is also conceivable for the rotary positioning unit 54a to be a different one Has a design that appears to be useful to a person skilled in the art, such as, for example, a design as teeth, etc.
  • the base body 46a also has a rotational play opening 58a ( Figure 3 ) in which the drive element 52a of the tool coupling device 10a is arranged.
  • the drive element 52a viewed along a direction at least substantially perpendicular to the axis of rotation 50a of the drive element 52a, is arranged relative to the base body 46a at a distance from an edge region of the base body 46a delimiting the rotational play opening 58a.
  • the drive element 52a is designed as a drive gear.
  • the connection housing 48a comprises a bearing recess 60a in which a bearing element 62a of the tool coupling device 10a is arranged for a rotatable mounting of the drive element 52a.
  • the bearing element 62a is designed as a bearing sleeve.
  • the bearing element 62a is designed as a roller bearing.
  • the drive element 52a is provided to transmit a driving force of the drive unit 40a to the cutting strand 34a.
  • the drive element 52a thus engages in the cutting strand 34a when the machine tool disconnecting device 12a is connected to the tool coupling device 10a.
  • the drive element 52a engages in drive recesses in cutting strand segments of the cutting strand 34a (not shown in more detail here).
  • the drive element 52a is non-rotatably connected to an output element (not shown here) of the output gear unit 42a.
  • the tool holding element 18a of the tool holding unit 16a of the tool coupling device 10a is pivotally mounted about an axis of movement 64a of the tool holding element 18a which is at least substantially parallel to a main extension plane of the tool holding element 18a.
  • the tool holding element 18a is pivotally mounted on the base body 46a.
  • the axis of movement 64a of the tool holding element 18a viewed in a projection plane into which the axis of movement 64a and the axis of rotation 50a of the drive element 52a are projected, runs at least substantially perpendicular to the axis of rotation 50a.
  • the tool holding element 18a is pivotably mounted less than 120 ° relative to the base body 46a. However, it is also conceivable for the tool holding element 18a to be pivoted relative to the base body 46a by an angle deviating from 90 °.
  • the tool holding unit 16a furthermore has at least one fixing element 30a, which is provided to fix the tool holding element 18a in at least one position.
  • the fixing element 30a is provided to fix the tool holding element 18a in a tool fixing position of the tool holding element 18a.
  • the fixing element 30a is pivotally mounted for this purpose.
  • the fixing element 30a is pivotally mounted on the tool holding element 18a.
  • the fixing element 30a comprises at least two locking areas 66a, 68a. However, it is also conceivable for the fixing element 30a to have a different number of latching areas 66a, 68a from two.
  • the latching areas 66a, 68a are, viewed in a plane running at least substantially perpendicular to the main extension plane of the tool holding element 18a or viewed in a plane running at least substantially parallel to the axis of rotation 50a of the drive element 52a, each delimiting an arc-shaped latching recess.
  • the latching areas 66a, 68a interact in a control element fixing position of the fixing element 30a with fixing bolts 70a, 72a of the tool holding unit 16a ( Figure 6 ).
  • the fixing bolts 70a, 72a are fixed on the base body 46a.
  • the fixing element 30a is thus provided for fixing the tool holding element 18a in the tool fixing position by means of a positive connection.
  • the fixing element 30a also has a securing recess 74a, which cooperates with a latching extension 76a of the tool holding unit 16a in the tool holding element fixing position of the fixing element 30a ( Figure 5 ).
  • the latching extension 76a is arranged on the base body 46a.
  • the latching extension 76a is integrally formed on the base body 46a.
  • the latching extension 76a is formed separately from the base body 46a and is fastened to the base body 46a by means of a fastening element which appears to be useful to a person skilled in the art.
  • the machine tool separating device 12a In the tool fixing position, the machine tool separating device 12a, in particular the guide unit 36a, is in a state of the machine tool separating device coupled to the tool coupling device 10a 12a by means of the tool holding element 18a in a receiving recess 78a of the base body 46a in the direction of the base body 46a with a clamping force.
  • This clamping force is generated by means of a pivoting movement of the tool holding element 18a in the direction of the receiving recess 78a and by means of a cooperation of the fixing element 30a and the fixing bolts 70a, 72a in the tool fixing position of the tool holding element 18a.
  • the tool holding element 18a lies against an outer surface of the guide unit 36a in order to generate a holding force in the direction of the base body 46a in a tool fixing position of the tool holding element 18a.
  • the tool holding element 18a holds the machine tool separating device 12a, in particular the guide unit 36a, in the tool fixing position of the tool holding element 18a as a result of a clamping force in the receiving recess 78a of the base body 46a.
  • the tool holding unit 16a is provided to apply a direction at least substantially parallel to the axis of rotation 50a of the drive element 52a to the machine tool separating device 12a when the machine tool separating device 12a is coupled to the tool coupling device 10a.
  • the tool holding unit 16a has a different configuration that appears to be useful to a person skilled in the art.
  • the machine tool separating device 12a is positively secured in a state of the machine tool separating device 12a coupled to the tool coupling device 10a by means of the receiving recess 78a of the base body 46a against a rotational movement along a direction of rotation about the axis of rotation 50a of the drive element 52a.
  • the receiving recess 78a forms at least one machine tool separator torque holding element of a machine tool separator torque holding unit.
  • the receiving recess 78a has a shape corresponding to an outer shape of at least a partial area of the machine tool separating device 12a, in particular a partial area of the guide unit 36a.
  • the receiving recess 78a is thus designed as a negative shape of at least a partial area of the machine tool separating device 12a, in particular a partial area of the guide unit 36a.
  • the base body 46a it is also conceivable for the base body 46a to have a different configuration that appears appropriate to a person skilled in the art, which can largely prevent a rotational movement of the machine tool separating device 12a in a state of the machine tool separating device 12a coupled to the tool coupling device 10a.
  • the tool coupling device 10a comprises at least one movement coupling unit 20a, via which the tool holding element 18a can be coupled to the clamping element 22a in order to move a clamping element 22a of the cutting strand clamping unit 14a.
  • the tensioning element 22a is mounted in a translationally movable manner in a guide recess 80a of the base body 46a.
  • the guide recess 80a is arranged in the receiving recess 78a.
  • the clamping element 22a is designed as a clamping bolt which, when the machine tool separating device 12a is coupled to the tool coupling device 10a, into a clamping recess 82a ( Figure 5 ) of the machine tool separating device 12a engages.
  • the tensioning element 22a is formed in one piece with a movement coupling element 84a of the movement coupling unit 20a. However, it is also conceivable that the tensioning element 22a is formed separately from the movement coupling element 84a and is fixed to the movement coupling element 84a by means of a positive and / or non-positive connection.
  • the movement coupling element 84a is mounted in the base body 46a so as to be translationally movable.
  • the movement coupling element 84a comprises an actuation region 86a, which interacts with a transmission element of the movement coupling unit 20a to move the clamping element 22a as a result of a movement of the tool holding element 18a.
  • the transmission element of the movement coupling unit 20a is designed here as an eccentric element 28a ( Figure 3 ).
  • the movement coupling unit 20a thus comprises at least the eccentric element 28a, which cooperates with the clamping element 22a to move the clamping element 22a as a result of a movement of the tool holding element 18a via the movement coupling element 84a.
  • the eccentric element 28a is formed in one piece with the tool holding element 18a ( Figure 3 ).
  • the eccentric element 28a is arranged eccentrically or asymmetrically to the axis of movement 64a of the tool holding element 18a on the tool holding element 18a.
  • the cutting strand tensioning unit 14a has at least one spring element 88a, which is provided for closing the tensioning element 22a with a spring force act upon.
  • the spring element 88a is supported at one end on the base body 46a and at a further end, the spring element 88a is supported on a clamping force support region 90a of the movement coupling element 84a.
  • the movement coupling element 84a can be used to support a clamping force of the clamping element 22a, and an additional clamping and / or locking of the movement coupling element 84a on the base body 46a is possible, for example by means of a rough surface of the movement coupling element 84a or by a locking unit, etc.
  • connection area 92a has an elliptical shape ( Figure 4 ).
  • the spring element 88a is compressed as a result of the interaction of the eccentric element 28a and the actuation region 86a of the movement coupling element 84a. This moves the tension member 22a into a guide unit insertion position.
  • the machine tool separating device 12a is inserted into the receiving recess 78a of the main body 46a along a direction at least substantially parallel to the axis of rotation 50a of the drive element 52a.
  • the tool holding element 18a is arranged in the position pivoted away from the base body 46a.
  • the drive element 52a is inserted into a coupling recess 94a of the guide unit 36a ( Figure 5 ).
  • the cutting strand 34a engages with the drive element 52a.
  • the clamping element 22a is inserted into the clamping recess 82a of the guide unit 36a.
  • the eccentric element 28a releases the actuation area 86a of the movement coupling element 84a.
  • the movement coupling element 84a together with the tensioning element 22a, is translated by a spring force of the spring element 88a into a direction away from the drive element 52a Direction in a clamping position of the clamping element 22a moved.
  • the guide unit 36a is moved relative to the drive element 52a. This leads to tensioning of the cutting strand 34a by the spring force of the spring element 88a or by the movement of the tensioning element 22a. This achieves a cutting strand tensioning force for tensioning the cutting strand 34a.
  • the cutting strand 34a is thus automatically tensioned as a result of the machine tool separating device 12a being clamped in the receiving recess 78a of the base body 46a by means of the tool holding unit 16a.
  • the machine tool separating device 12a is clamped firmly in the receiving recess 78a by means of the tool holding unit 16a between the tool holding element 18a and the base body 46a.
  • the cutting strand tensioning unit 14a is also self-locking in order to avoid an unwanted release of a cutting strand tensioning force for tensioning the cutting strand 34a.
  • Figure 7 shows an alternative tool coupling device 10b, which is provided for receiving a machine tool separating device 12b designed as a closed system, in a state disassembled from a portable machine tool (not shown in more detail here).
  • the portable machine tool has an analogous configuration to that in FIGS Figures 1 to 6 described portable machine tool 32a.
  • the portable machine tool and the machine tool separating device 12b together form a machine tool system.
  • the tool coupling device 10b comprises at least one cutting strand clamping unit 14b for generating a cutting strand clamping force and at least one tool holding unit 16b which has at least one movably mounted tool holding element 18b.
  • the tool holding element 18b is in this case rotatable about an at least substantially perpendicular to a main extension plane of the tool holding element 18b or about an at least substantially parallel to an axis of rotation 50b of a drive element 52b of the tool coupling device 10b movement axis 64b of the tool holding element 18b.
  • the tool holding element 18b is provided to apply a clamping force in the direction of a base body 46b of the tool coupling device 10b to the machine tool separating device 12b in a tool fixing position of the tool holding element 18b.
  • the tool holding element 18b is designed in the form of an annular segment.
  • the tool holding element 18b is rotatably mounted in the base body 46b.
  • the tool holding element 18b has a spiral or a thread-like clamping area 98b.
  • the clamping area 98b is arranged on an outer circumference of the tool holding element 18b.
  • the clamping region 98b it is also conceivable for the clamping region 98b to be arranged at another position on the tool holding element 18b which appears to be useful to a person skilled in the art, such as, for example, on an inner circumference of the tool holding element 18b.
  • the clamping region 98b When viewed along a circumferential direction about the axis of rotation 50b of the drive element 52b, the clamping region 98b has an incline. Thus, the clamping region 98b is inclined along an overall extent of the clamping region 98b relative to a main plane of extension of the tool holding element 18b.
  • the clamping area 98b interacts to generate a clamping force with a clamping groove (not shown here) of the base body 46b, in which the clamping area 98b engages.
  • the tool holding unit 16b comprises at least one operating element 96b for actuating or moving the tool holding element 18b.
  • the operating element 96b is rotated about an axis of rotation 100b of the operating element 96b.
  • the axis of rotation 100b of the control element 96b runs at least substantially parallel to the axis of rotation 50b of the drive element 52b.
  • the tool holding element 18b comprises a bolt-shaped actuation area 102b ( Figure 9 ).
  • the actuation region 102b is arranged in a movement guide recess 104b in the form of an annular segment of the base body 46b ( Figure 9 ).
  • the control element 96b has a movement transmission element 106b, which is provided to receive the actuation area 102b of the tool holding element 18b.
  • the movement transmission element 106b is designed as a cup-shaped depression which is designed to correspond to the bolt-shaped actuation area 102b of the tool holding element 18b.
  • the motion transmission element 106b has a different configuration that appears to be useful to a person skilled in the art, such as, for example, a configuration as a circular through-hole, etc.
  • the tool coupling device 10b comprises at least one movement coupling unit 20b, via which the tool holding element 18b can be coupled to the clamping element 22b to move a clamping element 22b of the cutting strand clamping unit 14b.
  • the clamping element 22b is mounted in a translationally movable manner in a guide recess 80b of the base body 46b of the tool coupling device 10b.
  • the movement coupling unit 20b has at least one link element 24b for a movement of the clamping element 22b as a result of a movement of the tool holding element 18b.
  • the link element 24b is rotatably supported.
  • the link element 24b is designed as a link plate which has at least one tensioning element guide link 110b and at least two link element guide recesses 112b, 114b ( Figure 9 ).
  • the tensioning element 22b is arranged in the assembled state in the tensioning element guide link 110b.
  • the tensioning element guide link 110b here has a spiral course with respect to the axis of rotation 50b of the drive element 52b.
  • the cutting strand tensioning unit 14b comprises at least one spring element 88b, which is provided to apply a spring force to the tensioning element 22b ( Figures 8 and 9 ).
  • the spring element 88b is designed as a spring plate, which acts on the clamping element 22b in the direction of a clamping position of the clamping element 22b with a spring force.
  • the movement coupling unit 20b comprises at least one link spring element 108b is provided to apply a spring force to the link element 24b ( Figures 8 and 9 ).
  • the link spring element 108b is designed as a leg spring.
  • the link spring element 108b is supported at one end on the base body 46b and at another end, the link spring element 108b is supported on the link element 24b.
  • the link element 24b is moved by means of the tool holding element 18b or by means of a rotary movement of the operating element 96b by the tool holding element 18b against the spring force of the link spring element 108b.
  • the tool holding element 18b has a driving extension 116b, which extends in the direction of the link element 24b.
  • the entrainment extension 116b interacts to move the link element 24b with a movement entrainment area 118b of the link element 24b ( Figure 9 ).
  • the link element 24b is moved at least in one direction depending on a movement of the tool holding element 18b together with the tool holding element 18b.
  • the tensioning element 22b is moved into a guide unit insertion position as a result of a movement of the link element 24b by means of the tensioning element guide link 110b.
  • the tool holding element 18b releases a receiving recess 78b of the base body 46b for receiving the machine tool separating device 12b.
  • the guide recess 80b, in which the tensioning element 22b is guided, is arranged in the region of the receiving recess 78b on the base body 46b.
  • the machine tool separating device 12b can be introduced into the receiving recess 78b along a direction which is at least substantially parallel to the axis of rotation 50b of the drive element 52b.
  • the tool holding element 18b is then moved into a clamping position as a result of a rotary movement of the operating element 96b, as a result of which a clamping force is exerted on the machine tool separating device 12b in the direction of the base body 46b.
  • the link element 24b is rotated as a result of the spring force of the link spring element 108b and the tensioning element 22b is moved translationally in the guide recess 80b by means of the tensioning element guide link 110b.
  • This will become a management unit 36b of the machine tool separating device 12b is moved relative to the drive element 52b.
  • the cutting strand 34b is thus automatically tensioned as a result of the machine tool separating device 12b being clamped in the receiving recess 78b of the base body 46b.
  • the tensioning element guide link 110b is designed in such a way that by means of a cooperation of the tensioning element guide link 110b with the spring element 88b and the link spring element 108b, self-locking of a movement of the tensioning element 22b into a guide unit insertion position takes place.
  • the link spring element 108b acts via the link element 24b on the tool holding element 18b, which in turn acts on the operating element 96b.
  • the tool holding element 18b is urged into the clamping position by means of the spring force of the link spring element 108b.
  • the tool holding element 18b or the operating element 96b it is also conceivable for the tool holding element 18b or the operating element 96b to be decoupled from the spring force and to be held in the clamping position by means of a fixing unit of the tool coupling device 10b.
  • Figure 10 shows a further, alternative tool coupling device 10c, which is provided for receiving a machine tool separating device 12c designed as a closed system ( Figure 12 ), in a disassembled state from a portable machine tool (not shown here).
  • the portable machine tool has an analogous configuration to that in FIGS Figures 1 to 6 described portable machine tool 32a.
  • the portable machine tool and the machine tool separating device 12c together form a machine tool system.
  • the tool coupling device 10c comprises at least one cutting strand clamping unit 14c for generating a cutting strand clamping force and at least one tool holding unit 16c which has at least one movably mounted tool holding element 18c.
  • the tool holding element 18c is pivotable about an at least substantially parallel to a main extension plane of the tool holding element 18c or about an at least substantially perpendicular to an axis of rotation 50c of a drive element 52c of the tool coupling device 10c extending movement axis 64c of the tool holding element 18c.
  • the tool coupling device 10c comprises at least one movement coupling unit 20c, via which the tool holding element 18c can be coupled to the clamping element 22c to move a clamping element 22c of the cutting strand clamping unit 14c.
  • the movement coupling unit 20c has at least one link element 24c for a movement of the clamping element 22c as a result of a movement of the tool holding element 18c.
  • the link element 24c is mounted such that it can be moved in translation.
  • the link element 24c is guided in an axial bearing recess 120c of a base body 46c of the tool coupling device 10c ( Figure 11 ).
  • the link element 24c comprises a tensioning element guide link 110c for moving the tensioning element 22c.
  • the tensioning element guide link 110c has a course which extends at least substantially transversely to an axis of movement of the link element 24c. The tensioning element guide link 110c is thus inclined relative to the movement axis of the link element 24c.
  • the movement coupling unit 20c comprises at least one lever element 26c, via which the tool holding element 18c can be coupled to a link element 24c of the movement coupling unit 20c in order to move the clamping element 22c.
  • the lever element 26c is rotatably mounted in the base body 46c about an axis of movement of the lever element 26c at least substantially parallel to the axis of rotation 50c of the drive element 52c. To move the link element 24c, the lever element 26c abuts the link element 24c at one end.
  • the lever element 26c has an actuation extension 122c which interacts with the tool holding element 18c.
  • the movement coupling unit 20c comprises at least one spring element 88c, which is provided to apply a spring force to the link element 24c.
  • the spring element 88c is designed as a leg spring.
  • the spring element 88c is supported at one end on the base body 46c and at another end, the spring element 88c is supported on the link element 24c.
  • the tool holding unit 16c has at least one fixing element 30c, which is provided to fix the tool holding element 18c in at least one position.
  • the fixing element 30c has an analogous configuration to that in FIGS Figures 1 to 6 described Fixing element 30a. The tool holding element 18c is thus fixed in a tool fixing position of the tool holding element 18c by the fixing element 30c ( Figure 12 ).
  • the machine tool separating device 12c is inserted into a receiving recess 78c of the main body 46c along a direction at least substantially parallel to the axis of rotation 50c of the drive element 52c.
  • the tool holding element 18c is arranged in a position pivoted away from the base body 46c.
  • the drive element 52c is inserted into a coupling recess 94c of a guide unit 36c of the machine tool separating device 12c.
  • a cutting strand 34c of the machine tool separating device 12c comes into engagement with the drive element 52c.
  • the clamping element 22c is inserted into a clamping recess 82c of the guide unit 36c.
  • the tool holding element 18c actuates the lever element 26c by means of an eccentric element 28c of the movement coupling unit 20c which is formed in one piece with the tool holding element 18c.
  • the lever element 26c is thereby pivoted about the axis of movement of the lever element 26c and actuates the link element 24c.
  • the link element 24c is moved translationally.
  • the tensioning element 22c is moved into a guide unit insertion position by the tensioning element guide link 110c.
  • Figure 13 shows a further, alternative tool coupling device 10d, which is provided for receiving a machine tool separating device 12d designed as a closed system ( Figure 14 ), in a disassembled state from a portable machine tool (not shown here).
  • the portable machine tool has an analogous configuration to that in FIGS Figures 1 to 6 described portable machine tool 32a.
  • the portable machine tool and the machine tool separating device 12d together form a machine tool system.
  • the tool coupling device 10d comprises at least one cutting strand tensioning unit 14d for generating a cutting strand tensioning force and at least one tool holding unit 16d, which has at least one movably mounted tool holding element 18d.
  • the tool holding element 18d is pivotally mounted about an axis of movement 64d of the tool holding element 18d which is at least substantially parallel to a main extension plane of the tool holding element 18d or at least substantially perpendicular to an axis of rotation 50d of a drive element 52d of the tool coupling device 10d.
  • the tool coupling device 10d comprises at least one movement coupling unit 20d, via which the tool holding element 18d can be coupled to the clamping element 22d to move a clamping element 22d of the cutting strand clamping unit 14d.
  • the motion coupling unit 20d has an analogous configuration to that in FIGS Figures 1 to 6 described motion coupling unit 20a.
  • the tool holding unit 16d has at least one fixing element 30d, which is provided to fix the tool holding element 18d in at least one position.
  • the fixing element 30d is designed as a wing nut.
  • the fixing element 30d is rotatably and translationally mounted in a fixing recess 124d of the tool holding element 18d ( Figure 14 ).
  • the fixing element 30d interacts to fix the tool holding element 18d with a threaded region 126d of the clamping element 22d.
  • the fixing element 30d and the threaded region 126d of the clamping element 22d are connected to one another.
  • a translational movement of the tensioning element 22d together with the fixing element 30d is possible.
  • Figure 15 shows a further, alternative tool coupling device 10e, which is provided for receiving a machine tool separating device (not shown here) designed as a closed system, in a disassembled from a portable machine tool (not shown here) Status.
  • the portable machine tool has an analogous configuration to that in FIGS Figures 1 to 6 described portable machine tool 32a.
  • the portable machine tool and the machine tool separating device together form a machine tool system.
  • the tool coupling device 10e comprises at least one cutting strand clamping unit 14e for generating a cutting strand clamping force and at least one tool holding unit 16e which has at least one movably mounted tool holding element 18e.
  • the tool holding element 18e is pivotably mounted about an axis of movement 64e of the tool holding element 18e, which is at least substantially parallel to a main extension plane of the tool holding element 18e or at least substantially perpendicular to an axis of rotation 50e of a drive element 52e of the tool coupling device 10e.
  • the tool coupling device 10e comprises at least one movement coupling unit 20e, via which the tool holding element 18e can be coupled to the clamping element 22e to move a clamping element 22e of the cutting strand clamping unit 14e.
  • the movement coupling unit 20e has at least one link element 24e for a movement of the clamping element 22e as a result of a movement of the tool holding element 18e.
  • the link element 24e is rotatably supported.
  • the link element 24e is rotatably mounted in a base body 46e of the tool coupling device 10e.
  • the link element 24e also has at least one clamping element guide link 110e for a movement of the clamping element 22e as a result of a movement of the tool holding element 18e.
  • the movement coupling unit 20e comprises at least one lever element 26e which, as a result of a movement of the tool holding element 18e, moves the link element 24e to move the clamping element 22e.
  • the lever element 26e is in this case pivotally mounted about a movement axis of the lever element 26e in the base body 46e.
  • the axis of movement of the lever element 26e here runs at least substantially parallel to the axis of movement 64e of the tool holding element 18e.
  • the movement coupling unit 20e has a force introduction element 128e, which is pivotably mounted on the tool holding element 18e.
  • the force introduction element 128e is pivotally connected to the lever element 26e by means of a joint element 130e.
  • the joint element 130e is embodied here as a hinge pin, which engages in a hinge eye of the lever element 26e and the force introduction element 128e.
  • the movement coupling unit 20e comprises at least one spring element 88e, which is provided to apply a spring force to the link element 24e.
  • the spring element 88e is designed as a leg spring.
  • the spring element 88e is supported at one end on the base body 46e and at a further end, the spring element 88e is supported on the link element 24e.
  • FIG. 4 shows a further, alternative tool coupling device 10f, which is used to receive a machine tool separating device 12f designed as a closed system ( Figure 18 ) is provided in a disassembled state from a portable machine tool (not shown here).
  • the portable machine tool has an analogous configuration to the portable machine tool 32a described in FIGS. 1 to 6.
  • the portable machine tool and the machine tool separating device 12f together form a machine tool system.
  • the tool coupling device 10f comprises at least one cutting strand clamping unit 14f for generating a cutting strand clamping force and at least one tool holding unit 16f which has at least one movably mounted tool holding element 18e.
  • the tool holding element 18f is pivotally mounted about an axis of movement 64f of the tool holding element 18f which is at least substantially parallel to a main extension plane of the tool holding element 18f or at least substantially perpendicular to an axis of rotation 50f of a drive element 52f of the tool coupling device 10f.
  • the tool coupling device 10f comprises at least one movement coupling unit 20f, via which the tool holding element 18f can be coupled to the clamping element 22f to move a clamping element 22f of the cutting strand clamping unit 14f.
  • the movement coupling unit 20f has at least one link element 24f for a movement of the clamping element 22f as a result of a movement of the tool holding element 18f.
  • the link element 24f is mounted such that it can be moved in translation.
  • the link element 24f is guided in an axial bearing recess 120f of a base body 46f of the tool coupling device 10f ( Figure 18 ).
  • the link element 24f comprises a tensioning element guide link 110f for moving the tensioning element 22f.
  • the tensioning element guide link 110f has a course that extends at least substantially transversely to an axis of movement of the link element 24f.
  • the tensioning element guide link 110f is thus inclined relative to the movement axis of the link element 24f.
  • the movement coupling unit 20f comprises at least one lever element 26f which, as a result of a movement of the tool holding element 18f, moves the link element 24f to move the clamping element 22f.
  • the lever element 26f is rotatably mounted in the base body 46f about an axis of movement of the lever element 26f running at least substantially parallel to the axis of rotation 50f of the drive element 52f. To move the link element 24f, the lever element 26f abuts the link element 24f at one end.
  • the lever element 26f has a pressing area 132f which interacts with the tool holding element 18f.
  • the movement coupling unit 20f comprises at least one spring element 88f, which is provided to apply a spring force to the link element 24f of the movement coupling unit 20f.
  • the spring element 88f is designed as a helical compression spring.
  • the spring element 88f is supported at one end on the base body 46f and at a further end the spring element 88f is supported on the link element 24f.
  • the spring element 88f is arranged in the axial bearing recess 120f of the base body 46f.
  • Figure 19 shows a further, alternative tool coupling device 10g, which is provided for receiving a machine tool separating device 12g designed as a closed system, in a state disassembled from a portable machine tool (not shown here).
  • the portable machine tool has an analogous configuration to the portable machine tool 32a described in FIGS. 1 to 6.
  • the portable machine tool and the machine tool separating device 12g together form a machine tool system.
  • the tool coupling device 10g has an at least substantially analogous configuration to that in FIGS Figures 17 and 18th described tool coupling device 10f.
  • a movement coupling unit 20g of the tool coupling device 10g has a spring element 88g designed as a leg spring.
  • a tool holding unit 16g of the tool coupling device 10g has at least one fixing element 30g, which is provided to fix a tool holding element 18g in at least one position.
  • the fixing element 30g is pivotally mounted in a base body 46g of the tool coupling device 10g ( Figure 21 ).
  • the tool holding unit 16g also has a fixing spring element 134g, which is provided to apply a spring force to the fixing element 30g (FIGS. 20 and 21).
  • the fixing element 30g is thus designed as a spring-loaded latching hook, which cooperates with a fixing extension 136g arranged in the tool holding element 18g to fix the tool holding element 18g in a tool fixing position ( Figure 21 ).
  • the fixing extension 136g is formed in one piece with the tool holding element 18g.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Jigs For Machine Tools (AREA)
EP13722447.3A 2012-06-28 2013-05-14 Werkzeugkopplungsvorrichtung Active EP2866987B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012211096.8A DE102012211096A1 (de) 2012-06-28 2012-06-28 Werkzeugkopplungsvorrichtung
PCT/EP2013/059930 WO2014000950A1 (de) 2012-06-28 2013-05-14 Werkzeugkopplungsvorrichtung

Publications (2)

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EP2866987A1 EP2866987A1 (de) 2015-05-06
EP2866987B1 true EP2866987B1 (de) 2020-04-01

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US (1) US9701037B2 (zh)
EP (1) EP2866987B1 (zh)
CN (1) CN104411471B (zh)
DE (1) DE102012211096A1 (zh)
WO (1) WO2014000950A1 (zh)

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DE102012211094A1 (de) * 2012-06-28 2014-01-02 Robert Bosch Gmbh Werkzeugkopplungsvorrichtung
DE102012211096A1 (de) * 2012-06-28 2014-01-16 Robert Bosch Gmbh Werkzeugkopplungsvorrichtung
DE102012211098A1 (de) * 2012-06-28 2014-01-23 Robert Bosch Gmbh Verschlussvorrichtung
JP6026943B2 (ja) * 2013-03-29 2016-11-16 株式会社マキタ チェンソーのガイドバー締結装置
DE102014004526A1 (de) * 2014-03-27 2015-10-01 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät
DE102014221213A1 (de) * 2014-10-20 2016-04-21 Robert Bosch Gmbh Handwerkzeugmaschine mit einer SDS-Werkzeugaufnahme
DE102015209408A1 (de) * 2015-05-22 2016-11-24 Robert Bosch Gmbh Werkzeugmaschinentrennvorrichtung
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DE102017214118A1 (de) * 2017-08-11 2019-02-14 Robert Bosch Gmbh Schnellspannvorrichtung für eine, insbesondere zumindest eine rotierend antreibbare Abtriebswelle aufweisende, tragbare Werkzeugmaschine, insbesondere Winkelschleifmaschine
US11766804B2 (en) * 2019-10-07 2023-09-26 Preston Hess Collapsible chainsaw

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Publication number Publication date
CN104411471A (zh) 2015-03-11
DE102012211096A1 (de) 2014-01-16
US9701037B2 (en) 2017-07-11
EP2866987A1 (de) 2015-05-06
US20150290830A1 (en) 2015-10-15
WO2014000950A1 (de) 2014-01-03
CN104411471B (zh) 2017-12-19

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