EP3529004B1 - Schnellspannvorrichtung für eine zumindest eine rotierend antreibbare abtriebswelle aufweisende tragbare werkzeugmaschine, insbesondere winkelschleifmaschine - Google Patents

Schnellspannvorrichtung für eine zumindest eine rotierend antreibbare abtriebswelle aufweisende tragbare werkzeugmaschine, insbesondere winkelschleifmaschine Download PDF

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Publication number
EP3529004B1
EP3529004B1 EP17780078.6A EP17780078A EP3529004B1 EP 3529004 B1 EP3529004 B1 EP 3529004B1 EP 17780078 A EP17780078 A EP 17780078A EP 3529004 B1 EP3529004 B1 EP 3529004B1
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EP
European Patent Office
Prior art keywords
operator control
unit
operating
movement
clamping
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
EP17780078.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3529004A1 (de
Inventor
Bruno Luescher
Andreas Zurbruegg
David Winistoerfer
Alexander Wuensche
Marcus Schuller
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 EP3529004A1 publication Critical patent/EP3529004A1/de
Application granted granted Critical
Publication of EP3529004B1 publication Critical patent/EP3529004B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • 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
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle

Definitions

  • the EP 1 182 019 A1 discloses a quick release device according to the preamble of claim 1.
  • the invention is based on a quick-action clamping device for a portable machine tool, in particular an angle grinder, which has at least one rotationally drivable output shaft, with at least one clamping unit which, for tool-free fixing of an application tool unit on the output shaft, has at least one movably mounted clamping element for applying a clamping force to the application tool unit in a clamping position of the clamping element has, and with at least one operating unit at least for a movement of the clamping element in a release position of the clamping element, the at least one movably mounted operating element, in particular a movably mounted operating lever.
  • the operating element has at least one operating surface for moving the tensioning element into the release position, which is arranged in such a way that at least one force application point of the operating element interacts with a contact surface of a movably mounted operating element of the operating unit depending on a movement of the operating element is movable on the contact surface.
  • the actuating surface of the operating element and the contact surface of the actuating element interact, there is preferably a line contact between the actuating surface of the operating element and the contact surface of the actuating element.
  • the at least one force application point of the operating element is preferably arranged on a contact line of the actuating surface of the operating element.
  • Line contact preferably takes place between the actuating surface of the operating element and the contact surface of the actuating element along the contact line of the actuating surface of the operating element.
  • the at least one force application point of the operating element is formed by a contact point of the operating surface of the operating element, which is intended to bear against the contact surface of the operating element when the operating surface of the operating element and the contact surface of the operating element interact. “Provided” should be understood to mean, in particular, specially programmed, designed and/or equipped.
  • an element and/or a unit is provided for a specific function is to be understood in particular to mean that the element and/or the unit fulfills/fulfils and/or executes this specific function in at least one application and/or operating state.
  • executes "Movably mounted” is to be understood in particular as a mounting of an element and/or a unit, with the element and/or the unit being able to move, in particular decoupled from an elastic deformation of the element and/or the unit, along a movement axis of more than 5 mm, preferably more than 10 mm and more preferably more than 50 mm and/or about an axis of movement along an angular range of more than 1°, preferably more than 5° and more preferably more than 15°.
  • the at least one force application point can be moved in a manner that is already known to a person skilled in the art depending on a movement of the operating element and an interaction of the actuating surface with the contact surface on the actuating surface.
  • the at least one force application point is preferably designed differently from a fixed point of the actuating surface of the operating element.
  • a position of the at least one force application point on the actuating surface can preferably be changed in a manner already known to a person skilled in the art depending on a movement position of the operating element and on interaction of the actuating surface with the contact surface.
  • the actuating surface of the operating element in particular the at least one force application point, preferably slides along the contact surface of the actuating element when the actuating surface of the operating element and the contact surface of the actuating element interact.
  • the actuating surface of the operating element is preferably arranged on an eccentric section of the operating element.
  • the actuating surface of the operating element is preferably designed as a curved outer surface of the operating element.
  • the operating element preferably has an arc-shaped outer contour in the eccentric section, in particular in a plane running at least essentially perpendicularly to a movement axis of the operating element.
  • the operating element preferably has a maximum longitudinal extent which is in particular less than 50 mm, preferably less than 40 mm and particularly preferably less than 30 mm.
  • the maximum longitudinal extent of the operating element preferably runs along a direction running at least essentially perpendicularly to a movement axis of the operating element.
  • the quick-action clamping device preferably comprises at least one decoupling unit, which is provided for decoupling the operating unit from the clamping unit as a function of a rotational speed of the output shaft.
  • the decoupling unit is preferably provided to activate the operating unit depending on a speed of the output shaft, which is in particular greater than 100 rpm, preferably greater than 500 rpm, particularly preferably greater than 1000 rpm and very particularly preferably greater than 5000 rpm, to be decoupled from the tensioning unit.
  • the decoupling unit is provided to couple the operating unit to the tensioning unit, in particular to enable this a movement of the clamping element by means of an action of an operator force via the operating unit.
  • the decoupling unit is preferably provided for preventing, interrupting and/or converting a transmission of an actuating force from the operating unit to the tensioning unit into a movement of a decoupling element as a function of a rotational speed of the output shaft.
  • the decoupling unit is provided for preventing and/or interrupting a power transmission connection between the operating unit and the tensioning unit as a function of a rotational speed of the output shaft.
  • the decoupling unit is preferably designed as a mechanical decoupling unit.
  • the decoupling unit is preferably provided to decouple the operating unit from the clamping unit as a function of a speed of the output shaft as a result of a relative movement between at least one element of the operating unit and at least one element of the clamping unit and/or the decoupling unit.
  • the decoupling unit can have a coupling element, a centrifugal force element, a friction element or another element considered appropriate by a person skilled in the art, by means of which the operating unit can be decoupled from the tensioning unit as a function of a speed of the output shaft.
  • the decoupling unit it is also conceivable for the decoupling unit to be in the form of an electrical and/or electronic decoupling unit.
  • a speed of the output shaft can be electronically detected, for example by means of at least one sensor element of the decoupling unit or by means of an electronic evaluation of drive unit parameters, with an actuator of the decoupling unit creating a lock the decoupling unit can be actuated, which activates or deactivates actuation of the operating unit depending on a speed of the output shaft, and/or a clutch of the decoupling unit depending on a speed of the output shaft by means of an actuator of the decoupling unit can be actuated, which opens or closes a power transmission connection between the operating unit and the tensioning unit.
  • the decoupling unit is preferably arranged at least partially on and/or in the output shaft.
  • the decoupling unit can preferably be used to prevent a movement of the tensioning element as a result of an actuation of an operating element of the operating unit depending on a rotational speed of the output shaft.
  • the quick-action clamping device preferably comprises at least one safety unit, in particular a self-locking unit and/or a latching unit, which is provided for the purpose of causing a movement of the clamping element starting from the Clamping position in the release position of the clamping element, in particular to prevent tolerance and / or play-related movements of the clamping element.
  • the safety unit in particular the self-locking unit and/or the latching unit, is preferably provided for the purpose of preventing the clamping element, starting from the clamping position, from moving into the to secure the release position of the clamping element.
  • the expression "to be secured as far as possible against movement” is intended to be understood in particular as securing an element, in particular in one position of the element, against movement, with a tolerance- and/or play-related movement of the element being able to take place in a secured position of the element .
  • a form-fitting connection between the clamping element and the insert tool unit is preferably secured, in particular in order to prevent the insert tool unit from being unintentionally released from the clamping unit.
  • the application tool unit can preferably be removed from the tensioning unit and/or the output shaft.
  • the clamping element can preferably be secured by the securing unit in the clamping position by means of a form-fitting and/or non-positive connection in the clamping position against movement into the release position of the clamping element.
  • the fuse unit at least provided to prevent a pivoting movement of the clamping element starting from the clamping position of the clamping element at least as far as possible, in particular except for a tolerance- and/or play-related pivoting movement, against a pivoting movement of the clamping element into the release position.
  • the security unit can be designed as a magnetic security unit, as a mechanical security unit, as an electronic security unit or the like.
  • the security unit comprises at least one magnetic element, which secures the tensioning element in the tensioned position by means of the action of a magnetic force.
  • the safety unit comprises at least one mechanical safety element, which secures the tensioning element in the tensioned position by means of a positive and/or non-positive connection.
  • the security unit comprises at least one electronic element that secures the tensioning element in the tensioned position and/or that monitors a position of the tensioning element and, when the tensioned position is reached, controls an actuator that controls the tensioning element secured in the clamping position.
  • the security unit comprises at least one electronic element that secures the tensioning element in the tensioned position and/or that monitors a position of the tensioning element and, when the tensioned position is reached, controls an actuator that controls the tensioning element secured in the clamping position.
  • Other configurations of the security unit that appear sensible to a person skilled in the art are also conceivable.
  • the clamping element can preferably be moved into the clamping position and/or into the release position by means of a mechanical connection between the at least one operating element of the operating unit and the clamping element by means of the operating unit.
  • the operating element is preferably designed as an operating lever, in particular as a pivoted operating lever.
  • an operating element of the operating unit it is also conceivable for an operating element of the operating unit to be able to generate an electrical signal which can be used to control an actuator which is intended to move the clamping element into the clamping position and/or into the release position.
  • the operating unit can be embodied as a mechanical, electrical and/or electronic operating unit, which is provided to move the clamping element into the clamping position and/or into the release position as a result of an operating command from an operator and/or an operator's power.
  • the clamping unit preferably comprises at least two movably, in particular pivotably, mounted clamping elements.
  • the clamping unit comprises a different number of clamping elements from two.
  • the at least two tensioning elements preferably have an at least essentially analogous configuration.
  • the at least two tensioning elements of the tensioning unit are preferably mounted such that they can be moved relative to one another, in particular pivoted relative to one another.
  • the at least two clamping elements can be moved into a clamping position of the clamping elements and/or into a release position of the clamping elements by means of the operating unit.
  • the at least two clamping elements can preferably be moved together by means of the operating unit, in particular can be moved together into the clamping position and/or into the release position.
  • the at least two clamping elements can be moved into the clamping position and/or into the release position independently of one another by means of the operating unit.
  • the tensioning element is preferably arranged at least partially in the output shaft.
  • the output shaft surrounds the tensioning element at least partially, in particular completely, along a circumferential direction that runs around an axis of rotation of the output shaft.
  • the tensioning element is preferably connected to the output shaft in a rotationally fixed manner.
  • the tensioning element is preferably mounted pivotably about a pivot axis of the tensioning element.
  • the pivot axis of the tensioning element preferably runs transversely, in particular at least essentially perpendicularly, to the axis of rotation of the output shaft.
  • the pivot axis of the tensioning element preferably runs at least essentially perpendicularly to a tensioning axis of the tensioning unit.
  • a “clamping axis” is to be understood here in particular as an axis of the clamping unit, along which an axial securing force of the clamping unit can be exerted on the insert tool unit to fix the insert tool unit on the output shaft and/or along which a transmission element of the clamping unit can be moved to move the clamping element is stored.
  • “At least essentially perpendicular” is intended to define in particular an alignment of a direction relative to a reference direction, with the direction and the reference direction, viewed in particular in one plane, enclosing an angle of 90° and the angle has a maximum deviation of, in particular, less than 8° , advantageously less than 5° and particularly advantageously less than 2°.
  • the clamping element is preferably designed as a clamping jaw.
  • the tensioning element is preferably provided for the purpose of holding the application tool unit axially on the output shaft to secure. At least in the clamping position, the clamping element preferably engages at least partially in the tool insert unit, in particular in a fixing recess of the tool insert unit. The clamping element preferably engages behind a clamping extension of the tool insert unit, at least when the tool insert unit is in a state where it is fixed by means of the clamping unit.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • the operating element has a movement axis, in particular a pivot axis, which is offset relative to a movement axis of the actuating element, in particular skewed.
  • the axis of movement of the operating element preferably runs, viewed in a projection plane into which the axis of movement of the operating element and the axis of movement of the actuating element are projected, at least essentially perpendicular to the axis of movement of the actuating element.
  • the axis of movement of the actuating element preferably runs at least essentially parallel, in particular coaxially, to the clamping axis of the clamping unit and/or to the axis of rotation of the output shaft.
  • the actuating element is preferably mounted in a translationally movable manner along the movement axis of the actuating element.
  • the actuating element is preferably designed as an actuating bolt.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever. It can be structurally simple movement of at least one force application point on the contact surface of the actuating element at a Cooperation of the actuating surface of the operating element and the contact surface of the actuating element can be realized.
  • the operating element has a movement axis, in particular a pivot axis, with a straight line running through the movement axis of the operating element and the force application point with the contact surface of the operating element depending on an operating position of the operating element in an at least essentially perpendicular to the movement axis of the operating element enclose an angle from an angular range of 35° to 85°.
  • the straight line running through the movement axis and the force application point encloses an angle of less than 50° with the contact surface of the operating element in an operating position of the operating element, in which the operating element is moved from a rest position of the operating element into a contact position of the operating element and is greater than 35°, in particular an angle with a value of 40°.
  • the actuating surface is preferably in contact with the contact surface, with the actuating element being stationary along the movement axis of the actuating element.
  • the straight line running through the movement axis and the force application point encloses a smaller angle with the contact surface of the operating element in an operating position of the operating element, in which the operating element is moved from the rest position or starting from the contact position into an end position of the operating element than 90° and greater than 70°, in particular an angle with a value of 80°.
  • the operating surface is preferably in contact with the contact surface, with the operating element being moved along the movement axis of the operating element to a maximum extent by means of the operating element.
  • the operating element preferably has a maximum movement angle of 90° from the rest position to the end position.
  • the operating element covers the maximum idle stroke angle, preferably during a movement starting from the rest position into the contact position.
  • the control element In the rest position, the control element preferably rests with a stop area on a gear housing of the portable machine tool.
  • the stop area of the operating element is preferably arranged on a side of the operating element that faces away from the eccentric section.
  • the force application point can be moved along a straight line on the contact surface as a result of a movement of the operating element.
  • the force application point can preferably be moved along a straight line on the contact surface as a result of a movement of the operating element, starting from the contact position of the operating element into the end position of the operating element.
  • the actuating element is preferably moved translationally along the movement axis of the actuating element as a result of a movement of the operating element starting from the contact position of the operating element to the end position of the operating element, in particular to a movement of the clamping element starting from the clamping position of the clamping element to the release position of the clamping element.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • the force application point can be moved at least essentially over a maximum extent of the contact surface along a straight line on the contact surface as a result of a movement of the operating element.
  • the force application point is preferably movable as a result of a movement of the operating element, starting from the contact position of the operating element into the end position of the operating element, at least essentially over a maximum extent of the contact surface along a straight line on the contact surface.
  • the force application point can preferably be moved as a result of a movement of the operating element from one edge of the contact surface to another edge of the contact surface, which is remote from the edge of the contact surface.
  • the force application point can preferably be moved within an end face of the actuating element.
  • the end face of the actuating element which faces the operating element, preferably forms the contact surface of the actuating element.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • an advantageous power transmission can be realized between the operating element and the actuating element.
  • the operating element is pivotably mounted and has a minimum idle stroke angle of more than 5°.
  • the operating element preferably has a maximum idle stroke angle of less than 20°, in particular 18°.
  • An "idle stroke angle" is to be understood in particular as an angle that the operating element sweeps over during a movement starting from the rest position into the contact position.
  • the operating element can preferably be moved without contact with the actuating element during a movement starting from the rest position into the contact position.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-release device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • a comfortable movement of the control element, starting from the rest position into the contact position, can be made possible, which can be achieved with the action of a small operator force.
  • the operating element has at least one stop surface, which limits a maximum movement, in particular a maximum lifting angle, of the operating element and is arranged adjacent to the actuating surface on the operating element.
  • the stop surface is preferably provided to limit a maximum movement of the operating element by means of an interaction with a stop element of the operating unit arranged on the gear housing of the portable power tool.
  • the operating surface of the operating element preferably forms at least partially the stop surface of the operating element.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a maximum movement of the operating element can be limited in a structurally simple manner.
  • the control element has a movement axis, in particular a pivot axis, and at least two control surfaces which are arranged on opposite sides of the control element along a direction running at least substantially perpendicularly to the movement axis of the control element.
  • at least one of the at least two control surfaces is intended to cause the control element to move from the rest position to the contact position, in particular as a result of an operator exerting a compressive force on the at least one of the at least two control surfaces.
  • At least one of the at least two control surfaces is preferably provided to cause the control element to move from the contact position to the end position, in particular as a result of an operator exerting a tensile force on the at least one of the at least two control surfaces.
  • a high level of operating comfort can advantageously be achieved by means of the configuration of the quick-action clamping device according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element. It can be an advantageous one comfortable actuation of the control element designed as a control lever can be realized.
  • a portable machine tool in particular an angle grinder, is proposed with a quick-action clamping device according to the invention.
  • a "portable machine tool” is to be understood here in particular as a machine tool for machining workpieces, which can be transported by an operator without a transport machine.
  • the portable machine tool has a mass that is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg.
  • the portable machine tool is particularly preferably designed as an angle grinder.
  • the portable power tool it is also conceivable for the portable power tool to have a different design that would appear sensible to a person skilled in the art, such as a design as a circular saw machine, a grinding machine or the like.
  • the portable power tool preferably includes a driven shaft that can be driven in rotation.
  • the quick-action clamping device is preferably arranged on the output shaft.
  • the quick-action clamping device is preferably arranged at least partially in the output shaft.
  • the output shaft is preferably designed as a hollow shaft.
  • the portable machine tool forms a machine tool system together with an insert tool unit that can be fixed to the output shaft by means of the quick-action clamping device.
  • a high level of operating convenience can advantageously be achieved by means of the configuration of the portable machine tool according to the invention.
  • a change in a lever arm to a movement of the actuating element can be achieved as a function of a movement of the operating element.
  • a low actuating force can be used to actuate the operating element designed as an operating lever.
  • the portable machine tool comprises at least one gear housing on which the operating element is movably mounted and is arranged in the vicinity of at least one ventilation opening of the gear housing, the operating element being at least essentially free of ventilation openings on the gear housing in an unactuated state is arranged.
  • the operating element is preferably arranged on the transmission housing without covering the ventilation openings, at least in the rest position of the operating element.
  • a “near area” is to be understood in particular as an area that has a maximum distance relative to an element and/or a unit that is in particular less than 100 mm, preferably less than 50 mm and particularly preferably less than 20 mm .
  • a high level of operating convenience can advantageously be achieved by means of the configuration of the portable machine tool according to the invention.
  • a compact arrangement of the operating unit on the portable machine tool can advantageously be implemented.
  • FIG 1 shows a portable machine tool 14 designed as an angle grinder with a quick-action clamping device 10. It is also conceivable, however, for the portable machine tool 14 to have another configuration that would appear sensible to a person skilled in the art, such as a configuration as a circular saw machine, a grinder or the like.
  • the portable Machine tool 14 includes a gear housing 54 for a recording and / or Storage of a gear unit 58 of the portable machine tool 14.
  • the gear housing 54 is preferably made of a metallic material. However, it is also conceivable for the gear housing 54 to be made of another material that a person skilled in the art considers appropriate, such as plastic or the like.
  • the gear unit 58 is preferably designed as an angular gear.
  • the transmission unit 58 includes in particular a rotationally drivable output shaft 12 to which an insert tool unit 18 can be fixed, in particular by means of the quick-action clamping device 10.
  • the output shaft 12 is preferably designed as a hollow spindle in which the quick-action clamping device 10 is at least partially arranged ( figure 2 ).
  • a protective hood unit can be arranged on the transmission housing 54 in a manner already known to a person skilled in the art.
  • An additional handle can be arranged on the transmission housing 54 in a manner already known to a person skilled in the art.
  • Portable machine tool 14 includes a motor housing 60 for accommodating and/or supporting a drive unit 62 of portable machine tool 14.
  • Drive unit 62 is preferably provided in a manner already known to a person skilled in the art to drive the output shaft by means of interaction with transmission unit 58 12 rotating about an axis of rotation 64 of the output shaft 12 to drive.
  • the axis of rotation 64 of the output shaft 12 runs at least substantially perpendicular to a drive axis 66 of the drive unit 62.
  • the drive unit 62 is preferably designed as an electric motor unit. However, it is also conceivable for the drive unit 62 to have a different design that would appear sensible to a person skilled in the art, such as a design as a combustion drive unit, as a hybrid drive unit, as a pneumatic drive unit or the like.
  • FIG 2 shows a sectional view of the portable machine tool 14, in particular in the area of the gear housing 54, and the quick-action clamping device 10.
  • the quick-action clamping device 10 for the portable machine tool 14, which has at least the rotationally drivable output shaft 12, comprises at least one clamping unit 16, which is used to fix the insertion tool unit 18 in place without tools of the output shaft 12 has at least one movably mounted clamping element 20, 22 to exert a clamping force on the insertion tool unit 18 in a clamping position of the clamping element 20, 22.
  • the quick-action clamping device 10 has at least one operating unit 24, at least for moving the clamping element 20, 22 into a release position of the clamping element 20, 22, which has at least one movably mounted operating element 26, in particular a movably mounted operating lever.
  • the clamping unit 16 comprises at least two movably mounted clamping elements 20, 22.
  • the clamping unit 16 comprises a number of clamping elements 20, 22 that differs from two.
  • the at least two clamping elements 20, 22 have an at least essentially analogous configuration, so that features that are disclosed for one of the clamping elements 20, 22 are also to be regarded as disclosed for the other clamping element 20, 22.
  • the at least two clamping elements 20, 22 are pivotably mounted.
  • a pivot axis 68 of the clamping element 20, 22, in particular of the at least two clamping elements 20, 22, runs at least substantially perpendicularly to the axis of rotation 64 of the output shaft 12.
  • the at least two clamping elements 20, 22 are intended to fasten the insertion tool unit 18 in one on the clamping unit 16 and/or the output shaft 12 arranged state axially on the output shaft 12, in particular in the clamping position of the at least two clamping elements 20, 22.
  • the at least two clamping elements 20, 22 are rotatably connected to the output shaft 12.
  • the at least two tensioning elements 20, 22 can be driven together with the output shaft 12 to rotate about the axis of rotation 64.
  • the clamping unit 16 comprises at least one rotary driver element 70 for torque transmission to the tool insert unit 18.
  • the rotary driver element 70 engages in a receiving recess (not shown here) of the tool insert unit 18 and is in contact with at least one edge of the insertion tool unit 18 that delimits the receiving recess for torque transmission.
  • Torque is transmitted between the output shaft 12 and the tool insert unit 18 arranged on the clamping unit 16 and/or the output shaft 12, preferably in a manner already known to a person skilled in the art by means of a positive connection between the rotary driver element 70 and the tool insert unit 18.
  • the rotary driver element 70 is arranged in a rotationally fixed manner on the output shaft 12 .
  • the rotary driver element 70 can be driven together with the output shaft 12 to rotate about the axis of rotation 64 .
  • Operating unit 24 is preferably provided to move clamping element 20, 22, in particular the at least two clamping elements 20, 22, at least into the release position in which insert tool unit 18 can be removed from clamping unit 16 and/or output shaft 12.
  • the operating unit 24 is provided for moving the clamping element 20, 22, in particular the at least two clamping elements 20, 22, at least into the clamping position in which the insertion tool unit 18 can be clamped by means of the clamping unit 16 on the output shaft 12 is fixable.
  • the operating unit 24 preferably includes at least the operating element 26, which can be actuated by an operator.
  • the operating element 26 is designed as an operating lever.
  • the operating element 26 comprises a movement axis 36, in particular a pivot axis, which runs transversely, in particular at least essentially perpendicularly, to the axis of rotation 64 of the output shaft 12.
  • the control element 26 is preferably pivotably mounted about the axis of movement 36, in particular the pivot axis, of the control element 26.
  • the operating element 26 is decoupled from a rotary movement of the output shaft 12 .
  • Operating element 26 is movably mounted on transmission housing 54 and is arranged in the vicinity of at least one ventilation opening 56 in transmission housing 54, with operating element 26 being arranged on transmission housing 54 at least substantially without a ventilation opening covering it, at least in an unactuated state, in particular when operating element 26 is in a rest position .
  • the operating element 26 can be partially moved into a recess 76 in the transmission housing 54 .
  • dirt as a result of a movement of the operating element 26 about a movement axis 36 of the operating element 26 can be at least partially conveyed out of the recess 76 by means of an eccentric section 72 of the operating element 26 .
  • the operating element 26 has at least one brush element, which is arranged on the eccentric section 72 and is intended to sweep out the recess 76 as a result of a movement of the operating element 26 .
  • the at least one ventilation opening 56 is arranged on the gear housing 54 in such a way that a 56 exiting air flow to clean the recess 76 is usable.
  • the clamping element 20, 22, in particular the clamping elements 20, 22, is/are movably, in particular pivotably, mounted on the output shaft 12, in particular in the output shaft 12.
  • the pivot axis 68 of the clamping element 20, 22, in particular of the clamping elements 20, 22, preferably runs at least substantially perpendicularly to the clamping axis 78 of the clamping unit 16a.
  • the tensioning element 20 , 22 in particular the tensioning elements 20 , 22 , has/have at least one movement link element which is intended to interact with a link engagement element of the tensioning unit 16 .
  • the link engagement element is fixed to a transmission element 100 of the tensioning unit 16 .
  • the link engagement element is designed as a bolt that is fixed to the transmission element 100, in particular between two fork ends of the transmission element 100.
  • the clamping element 20, 22, in particular the clamping elements 20, 22, is/are movable from the release position into the clamping position, in particular by means of the action of a spring force of a clamping spring element 102 of the clamping unit 16 on the transmission element 100.
  • the clamping element 20, 22, in particular the clamping elements 20, 22, is/are automatically movable into the clamping position, in particular after the action of an operator force has been removed via the operating unit 24, as a result of the action of a spring force of the clamping spring element 102.
  • the quick-action clamping device 10 comprises at least one decoupling unit 86 which is provided for decoupling the operating unit 24 from the clamping unit 16 as a function of a rotational speed of the output shaft 12 .
  • Decoupling unit 86 is configured such that, depending on the rotational speed of output shaft 12, a relative movement takes place between at least one decoupling element 94 of decoupling unit 86 and at least actuating element 34 of operating unit 24 to decouple operating unit 24 from clamping unit 16.
  • the decoupling unit 86 includes at least that movably mounted decoupling element 94, which can be converted into a decoupling position depending on a rotational speed of the output shaft 12, in which the operating unit 24 is decoupled from the clamping unit 16.
  • the decoupling unit 86 is preferably designed as a friction decoupling unit.
  • the decoupling unit 86 has at least the movably mounted decoupling element 94 which can be moved relative to the output shaft 12 as a result of a frictional force between the decoupling element 94 and the actuating element 34 of the operating unit 24 .
  • the decoupling unit 86 has at least the movably mounted decoupling element 94 which is movably mounted in the output shaft 12 along and/or around the axis of rotation 64 of the output shaft 12 .
  • the decoupling unit 86 comprises at least the movably mounted decoupling element 94 and at least one decoupling spring element 96 which applies a spring force to the decoupling element 94 in the direction of the operating unit 24 .
  • the decoupling unit 86 has at least the movably mounted decoupling element 94 and at least one link element 98 for guiding the decoupling element 94 during a relative movement of the decoupling element 94 relative to the output
  • the decoupling element 94 can be brought into contact with the actuating element 34 by means of a non-positive connection, or the decoupling element 94 is in contact with the actuating element 34 by means of a non-positive connection.
  • the decoupling element 94 is preferably movably mounted in translation along the axis of rotation 64, in particular in the output shaft 12 or in the transmission element 100 of the tensioning unit 16.
  • the decoupling element 94 comprises in particular a conical connection region which at least partially engages in a recess of the actuating element 34. A frictional effect between the actuating element 34 and the decoupling element 94 is dependent in particular on the configuration of the conical connection region and a spring force of the decoupling spring element 96.
  • the decoupling spring element 96 is intended to apply a spring force to the decoupling element 94 in the direction of the actuating element 34.
  • the decoupling spring element 96 is arranged in the transmission element 100 of the clamping unit 16 .
  • the transmission element 100 is designed as a clamping fork.
  • the transmission element 100 is connected to the output shaft 12 in a torque-proof manner.
  • the transmission element 100 is along a clamping axis 78 of the clamping unit 16 can be moved in translation.
  • the transmission element 100 is movably mounted in the output shaft 12 .
  • the transmission element 100 can be subjected to a spring force at least by means of the tensioning spring element 102 of the tensioning unit 16 along the tensioning axis 78 , in particular in the direction of the operating unit 24 .
  • Decoupling unit 86 has at least one connecting element 104, which is provided to connect the decoupling element 94 and the transmission element 100 to one another in terms of movement, in particular at least when the output shaft 12 is in a state with a low rotational speed or when the output shaft 12 is stationary.
  • the connecting element 104 is designed as a bolt.
  • the connecting element 104 is arranged, in particular fixed, on the decoupling element 94 .
  • the connecting element 104 can be moved together with the decoupling element 94 .
  • the connecting element 104 extends into the link element 98 of the decoupling unit 86 ( figure 2 ).
  • the link element 98 is designed as a link guide track.
  • the gate element 98 is arranged on the transmission element 100, in particular formed in one piece with the transmission element 100.
  • the decoupling element 94 and the connecting element 104 can be rotated relative to the transmission element 100 as a result of braking by actuating the actuating element 34, with the connecting element 104 being movable in the link element 98 designed as a slotted guide track in such a way that the decoupling element 94 counteracts a Spring force of the decoupling spring element 96 can be moved into a guide recess 106 of the transmission element 100 .
  • An actuation of the operating element 26 during a rotational movement of the output shaft 12 can be converted into a movement of the actuating element 34 and the decoupling element 94 relative to the transmission element 100 .
  • a movement of the transmission element 100 as a result of the action of an operator force by means of the operating unit 24 to transfer the clamping element 20, 22, in particular the clamping elements 20, 22, starting from the clamping position into the release position during a rotary movement of the output shaft 12 can be prevented as far as possible.
  • the transmission element 100 can be moved by means of the operating unit 24 against a spring force of the tension spring element 102 .
  • the transmission element 100 is provided to move the clamping element 20, 22, in particular the clamping elements 20, 22, starting from the clamping position into the release position.
  • Operating element 26 includes eccentric section 72 for actuating operating element 34 of operating unit 24.
  • Actuating element 34 is mounted so that it can move in a translatory manner along axis of rotation 64, in particular in output shaft 12 and/or in transmission housing 54.
  • Actuating element 34 is secured against rotation relative to the Transmission housing 54 is fixed in the transmission housing 54, in particular as a result of at least one lateral flattening of the actuating element 34, which enables axial movement and prevents rotational movement.
  • the actuating element 34 preferably has at least one flattening on each of two opposite sides of the actuating element 34 .
  • a sealing element 74 such as a rubber seal or the like, is preferably arranged in the area of the actuating element 34, in order to prevent dirt from penetrating into the transmission housing 54 and/or into the tensioning unit 16 at least as far as possible.
  • the sealing element 74 is preferably in contact with the actuating element 34 .
  • the actuating element 34 is in particular movably mounted relative to the sealing element 74 . When moving relative to sealing element 74, actuating element 34 slides on at least one sealing surface of sealing element 74.
  • the operating element 26 has at least one actuating surface 28, which is arranged such that at least one force application point 30 of the operating element 26 when interacting with a contact surface 32 movably mounted actuating element 34 of the operating unit 24 can be moved on the contact surface 32 as a function of a movement of the operating element 26 (cf. Figures 3 and 4 ).
  • the actuating surface 28 of the operating element 26 is preferably arranged on the eccentric section 72 of the operating element 26 .
  • actuating surface 28 of operating element 26 and contact surface 32 of actuating element 34 interact, there is linear contact between actuating surface 28 of operating element 26 and contact surface 32 of actuating element 34.
  • the at least one force application point 30 of operating element 26 is preferably on a contact line of the actuating surface 28 of the operating element 26 is arranged.
  • actuating surface 28 of the operating element 26 and the contact surface 32 of the actuating element 34 interact, there is linear contact between the actuating surface 28 of the operating element 26 and the contact surface 32 of the actuating element 34 along the contact line of the actuating surface 28 of the operating element 26.
  • a punctiform contact takes place, the punctiform contact taking place at the at least one force application point 30 of the operating element 26.
  • the at least one force application point 30 of the operating element 26 is formed by a point of contact of the operating surface 28 of the operating element 26, which is intended to bear against the contact surface 32 of the operating element 34 when the operating surface 28 of the operating element 26 and the contact surface 32 of the operating element 34 interact ( Figures 3 and 4 ).
  • the operating element 26 has the movement axis 36, in particular a pivot axis, which is offset relative to a movement axis 38 of the actuating element 34, in particular skewed.
  • the axis of movement 38 of the actuating element 34 preferably runs at least essentially parallel, in particular coaxially, to a clamping axis 78 of the clamping unit 16 and/or to the axis of rotation 64 of the output shaft 12.
  • the clamping axis 78 preferably runs at least essentially parallel, in particular coaxially, to the axis of rotation 64 of the Output shaft 12.
  • the operating element 26 has the movement axis 36, with a straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 having the contact surface 32 of the operating element 34 depending on an operating position and/or movement position of operating element 26 in a plane running at least essentially perpendicularly to movement axis 36 of operating element 26 enclose an angle 42 from an angle range of 35° to 85° (cf. Figures 3 and 4 ).
  • the straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 preferably closes in an actuation position and/or movement position of the operating element 26, in which the operating element 26 is in a rest position of the operating element 26 ( figure 2 ) into a contact position of the operating element 26 ( figure 3 ) is moved, forms an angle 42 with the contact surface 32 of the actuating element 34 which is smaller than 50° and larger than 35°, in particular an angle 42 with a value of 40° ( figure 3 ).
  • the operating surface 28 is preferably in contact with the contact surface 32 , with the operating element 34 not being moved by the operating element 26 along the movement axis 38 of the operating element 34 .
  • the straight line 40 running through the movement axis 36 of the operating element 26 and the force application point 30 preferably closes in an actuation position and/or movement position of the operating element 26, in which the operating element 26 is in the rest position ( figures 2 and 5 ) or starting from the contact position ( figure 3 ) is moved into an end position of the operating element 26 ( figure 4 ), with the contact surface 32 of the actuating element 34 an angle 42 which is smaller than 90 ° and larger than 70 °, in particular an angle 42 with a value of 80 °.
  • the operating surface 28 is preferably in contact with the contact surface 32 , with the operating element 34 being moved along the movement axis 38 of the operating element 34 at most by means of the operating element 26 .
  • the force application point 30 is movable as a result of a movement of the operating element 26 along a straight line on the contact surface 32, in particular when the operating element 26 moves from the contact position of the operating element 26 into the end position of the operating element 26.
  • the force application point 30 is as a result of a movement of the operating element 26 movable at least essentially over a maximum extension 44 of the contact surface 32 along a straight line on the contact surface 32, in particular when the operating element 26 moves starting from the contact position of the operating element 26 into the end position of the operating element 26.
  • the operating element 26 is pivotably mounted and has a minimum idle stroke angle 46 of more than 5°.
  • the operating element 26 preferably has a maximum idle stroke angle 46 of less than 20°, in particular 18°.
  • the maximum idle stroke angle 46 is an angle through which the operating element 26 rotates when the operating element 26 pivots from the rest position ( figures 2 and 5 ) to the contact position ( figure 3 ) is movable.
  • the operating element 26 has at least one stop surface 48 which limits a maximum movement, in particular a maximum lifting angle, of the operating element 26 and is arranged adjacent to the actuating surface 28 on the operating element 26 .
  • the stop surface 48 is preferably provided to bear against the transmission housing 54 in the end position of the operating element 26 in order to limit a maximum movement, in particular a maximum stroke angle, of the operating element 26 .
  • Operating element 26 has movement axis 36, in particular a pivot axis, and at least two operating surfaces 50, 52, which are arranged on opposite sides of operating element 26 along a direction running at least substantially perpendicularly to movement axis 36 of operating element 26.
  • One of the at least two control surfaces 50, 52 is to an action of an operator force to a movement of the control element 26 starting from the rest position ( figures 2 and 5 ) to the contact position ( figure 3 ) provided, in particular as a result of the action of a pressure force from an operator on one of the at least two control surfaces 50, 52.
  • One of the at least two control surfaces 50, 52 is subject to the action of an operator force to move the control element 26 starting from the contact position ( figure 3 ) to the final position ( figure 4 ) provided, in particular as a result of an operator exerting a tensile force on one of the at least two operating surfaces 50, 52.
  • the operating unit 24 includes at least one spring element 80, which the operating element 26 with a spring force in the direction of the rest position ( figures 2 and 5 ) of the operating element 26 is applied ( Figures 5 and 6 ).
  • the spring element 80 is preferably designed as a torsion spring, in particular as a torsion spring. One end of the spring element 80 is supported on the operating element 26 and another end of the spring element 80 is supported on the transmission housing 54 ( figure 6 ).
  • the spring element 80 is provided to close the operating element 26 with a spring force about the movement axis 36 of the operating element 26 pressurize
  • the spring element 80 is preferably arranged in an area of a bearing recess 82 of the operating element 26 .
  • the spring element 80 is intended to prefix the eccentric section 72 of the operating element 26 to a base body 84 of the operating element 26 when the operating element 26 is installed.
  • the spring element is provided to return the operating element 26 to the rest position and/or to hold the operating element 26 in the rest position.
  • the base body 84 is preferably formed from a plastic or from an elastomer.
  • the eccentric section 72 is preferably formed from a metallic material.
  • the operating surfaces 50, 52 are arranged on the base body 84.
  • the base body 84 is in the rest position ( figures 2 and 5 ) to the transmission housing 54. Damping against vibrations of the operating element 26 can advantageously be made possible during operation of the portable machine tool 14 .
  • figure 7 shows a force diagram of a control element force of the control element 26 compared to a spring force of the tension spring element 102 during a movement of the control element 26 about the movement axis 36 of the control element 26.
  • the force diagram is designed as a force-displacement (angle) diagram in which a force over a way is applied.
  • An upper graph 88 of the force diagram shows a course of a control element force of the control element 26 during a movement from the rest position ( figures 2 and 5 ) to the final position ( figure 4 ).
  • a middle graph 90 shows a course of a control element force of the control element 26 during a movement from the end position ( figure 4 ) to the rest position ( figures 2 and 5 ).
  • a lower graph 92 shows a spring force profile of tension spring element 102 as a function of the movement of operating element 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Manipulator (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Gripping On Spindles (AREA)
EP17780078.6A 2016-10-18 2017-10-04 Schnellspannvorrichtung für eine zumindest eine rotierend antreibbare abtriebswelle aufweisende tragbare werkzeugmaschine, insbesondere winkelschleifmaschine Active EP3529004B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016220362.2A DE102016220362A1 (de) 2016-10-18 2016-10-18 Schnellspannvorrichtung für eine zumindest eine rotierend antreibbare Abtriebswelle aufweisende tragbare Werkzeugmaschine, insbesondere Winkelschleifmaschine
PCT/EP2017/075111 WO2018072996A1 (de) 2016-10-18 2017-10-04 Schnellspannvorrichtung für eine zumindest eine rotierend antreibbare abtriebswelle aufweisende tragbare werkzeugmaschine, insbesondere winkelschleifmaschine

Publications (2)

Publication Number Publication Date
EP3529004A1 EP3529004A1 (de) 2019-08-28
EP3529004B1 true EP3529004B1 (de) 2023-02-01

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Country Status (7)

Country Link
US (1) US11607772B2 (ko)
EP (1) EP3529004B1 (ko)
JP (1) JP6802918B2 (ko)
KR (1) KR102431897B1 (ko)
CN (1) CN109843506B (ko)
DE (1) DE102016220362A1 (ko)
WO (1) WO2018072996A1 (ko)

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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
US10906153B2 (en) * 2018-06-01 2021-02-02 Makita Corporation Work tool
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JP7330914B2 (ja) * 2020-02-13 2023-08-22 株式会社マキタ 振動工具
KR102294777B1 (ko) * 2021-01-29 2021-08-27 주식회사 중부구조안전기술단 안전진단용 슈미트해머 타점위치의 면정리 장치
DE102022203059A1 (de) 2021-11-30 2023-06-01 Robert Bosch Gesellschaft mit beschränkter Haftung Werkzeugaufnahmevorrichtungen für tragbare Werkzeugmaschinen, insbesondere Winkelschleifmaschinen

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Also Published As

Publication number Publication date
CN109843506A (zh) 2019-06-04
KR102431897B1 (ko) 2022-08-16
KR20190071710A (ko) 2019-06-24
WO2018072996A1 (de) 2018-04-26
EP3529004A1 (de) 2019-08-28
CN109843506B (zh) 2022-01-11
BR112019006396A2 (pt) 2019-06-25
US11607772B2 (en) 2023-03-21
JP6802918B2 (ja) 2020-12-23
DE102016220362A1 (de) 2018-04-19
US20190262970A1 (en) 2019-08-29
JP2019534797A (ja) 2019-12-05

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