WO2012055650A1 - Dispositif de serrage pour machine-outil à main - Google Patents

Dispositif de serrage pour machine-outil à main Download PDF

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Publication number
WO2012055650A1
WO2012055650A1 PCT/EP2011/066565 EP2011066565W WO2012055650A1 WO 2012055650 A1 WO2012055650 A1 WO 2012055650A1 EP 2011066565 W EP2011066565 W EP 2011066565W WO 2012055650 A1 WO2012055650 A1 WO 2012055650A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
fastening
fastening element
lifting
clamping device
Prior art date
Application number
PCT/EP2011/066565
Other languages
German (de)
English (en)
Inventor
Florian Esenwein
Manfred Lutz
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
Priority to RU2013124410/02A priority Critical patent/RU2587366C2/ru
Priority to JP2013535337A priority patent/JP5657126B2/ja
Priority to EP11761068.3A priority patent/EP2632634B1/fr
Publication of WO2012055650A1 publication Critical patent/WO2012055650A1/fr

Links

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
    • 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
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • 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

  • a hand tool clamping device which comprises a fastening unit for securing a tool in the axial direction on a spindle and a decoupling unit for decoupling a fastening element of the fastening unit in the axial direction.
  • the invention relates to a hand tool clamping device, in particular for angle grinder, with at least one fastening unit for securing a tool in the axial direction on a spindle and with at least one decoupling unit for decoupling at least one fastening element of the fastening unit in the axial direction.
  • the hand-held power tool clamping device comprises a flow safety unit, which is provided to prevent Abiaufens the fastening unit and / or the tool from the spindle in a braking operation to at least partially convert a first relative movement between at least two fastening elements of the fastening unit in a second relative movement ,
  • a flow safety unit which is provided to prevent Abiaufens the fastening unit and / or the tool from the spindle in a braking operation to at least partially convert a first relative movement between at least two fastening elements of the fastening unit in a second relative movement
  • the term "provided” should be understood to mean in particular specially equipped and / or specially designed.
  • a fastening unit is to be understood here as meaning, in particular, a unit which is provided with the tool on a spindle by means of a positive connection and / or a frictional connection to secure and / or to brace against another component, in particular a receiving flange of a hand tool machine, so that forces and / or torques can be transmitted from the spindle to the tool in an assembled state of the tool.
  • the fastening unit has at least one first fastening element, which rests on the spindle by a screwing of a second fastening element of the fastening unit on the tool and which is movable relative to the second fastening element.
  • the second fastening element has a thread for screwing with a thread of the spindle, so that the fastening unit for securing and / or clamping of the tool is screwed onto the spindle.
  • the term "axial direction” should in particular define a direction which extends at least substantially parallel to a central axis of the fastening unit, the fastening unit being particularly preferably rotationally symmetrical with respect to the central axis, Furthermore, in an assembled state of the fastening unit, the central axis is coaxial with a rotational axis
  • the term "essentially parallel” is to be understood here as meaning, in particular, an alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction relative to the reference direction is a deviation, in particular less than 8 °, advantageously less than 5 ° and especially advantageously less than 2 °.
  • a “decoupling unit” should be understood here to mean, in particular, a unit which is provided with an axial clamping force acting on the tool from the fastening unit in an assembled state for disassembling the fastening unit by at least 5%, preferably at least 50% and particularly preferably at least Particularly preferably, the first fastening element can move along the axial direction relative to the first fastening element by means of a decoupling by the decoupling unit, in particular in the direction of the first fastening element
  • the fastening unit is particularly preferably detachably coupled to the spindle.
  • detachable is to be understood in particular a decoupling of the fastening unit from the spindle, wherein a functionality of the fastening unit, in particular a function for transferring the first relative movement between the first fastening element and the second fastening Healing element in the second relative movement, is maintained in a decoupled state.
  • a "safety-running unit” is to be understood here as meaning, in particular, a unit which is intended to prevent a release of a clamping force of the fastening unit in the axial direction in a braking operation the hand tool, can be understood, in which the spindle is braked by means of a braking device, so that a tracking of the spindle, such as at a power interruption to an electric motor, advantageously at least largely can be prevented.
  • a tracking of the spindle such as at a power interruption to an electric motor
  • the flow safety unit is provided to increase a clamping force due to a relative movement between the at least two transmission elements in the braking mode by at least 2%, preferably by at least 20% and more preferably by at least 50%.
  • the first fastening element is moved to increase the clamping force along the axial direction relative to the second fastening element, in particular in the direction of the tool.
  • the safety-running unit has at least one restoring unit which is provided to automatically return at least one of the two fastening elements to a basic position.
  • the first fastening element and / or the second fastening element is automatically returned to the basic position in a relieved state by means of the reset unit.
  • the term "automatically” here is intended in particular to define an automated reset of the actuating element by the reset unit, in particular a provision which is decoupled from a direct and / or indirect application of force by an operator to the first fastening element and / or the second fastening element - Dien concerned the hand tool clamping device can be achieved.
  • the flow assurance unit is designed as a lifting unit which is provided to move the fastening elements, in particular the at least two relatively movable fastening elements, due to the first relative movement relative to each other along the axial direction.
  • the first fastening element is moved along the axial direction as a result of the first relative movement relative to the second fastening element.
  • the first relative movement between the first fastening element and the second fastening element is a rotary movement.
  • a “lifting unit” is to be understood here as meaning, in particular, a unit which comprises at least two components which correspond to one another and by which a movement of an element, in particular of the first fastening element, can be generated along a straight path in order to produce a relative movement between the first fastening element and the second fastening element in another embodiment which appears expedient to a person skilled in the art, for example as a cam gear etc.
  • the lifting unit has at least one lifting element, which is formed at least partially in one piece with one of the fastening elements.
  • one piece should be understood in particular at least materially connected connected, for example, by a welding process, a gluing process, a Anspritzrind and / or another, the skilled person appear useful process, and / or advantageously formed in one piece, such as by a Manufacture from a casting and / or by a production in a single or Mehrkomponen- squirting process and advantageously from a single blank. It can be advantageous space, installation costs and costs can be saved.
  • the lifting element is formed in a ramp shape.
  • the term "ramp-shaped” is to be understood here as meaning, in particular, a geometrical shape which has a mathematically defined gradient along a path starting from a starting point in the direction of an end point, so that there is a height difference between the starting point and the end point and / or the starting point in
  • the lifting unit advantageously has at least one second lifting element, which generates the second relative movement as a result of the first relative movement by means of cooperation with the first lifting element If the second lifting element is preferably in the shape of a ramp, then the first ramp-shaped lifting element can slide along the second ramp-shaped lifting element relative to the second fastening element by means of a rotation of the first fastening element Is designed as a rolling element and can roll on the first ramp-shaped lifting element.
  • a pitch of the first lifting element and / or the second lifting element is preferably equal to or greater than a pitch of a thread of the fastening unit and the spindle to which the fastening unit is screwed up and down.
  • the pitch of the first lifting element and / or the second lifting element in this case corresponds in particular to 100 to 150% of the pitch of the thread of the fastening unit and the spindle, preferably 1 10 to 140% of the pitch of the thread of the fastening unit and the spindle, and more preferably 120 to 130%. the pitch of the thread of the fastening unit and the spindle.
  • friction increasing means are introduced into the thread of the fastening unit and the spindle, such as rubber elements, spring elements, coatings, etc. This can be structurally simple the first relative movement are converted into the second relative movement. Further, by means of the ramp-shaped lifting element advantageously a high clamping force can be generated in the braking operation, which acts on a clamping on the tool.
  • the lifting unit has at least one lifting element which is movably mounted relative to the at least two fastening elements which are movable relative to one another. It can be constructively simple ne relative movement between the first fastening element and / or the second fastening element and the lifting element to prevent Abiaufens the fastening unit and / or the tool are generated by the spindle.
  • the lifting element is at least partially disposed between the fastening elements.
  • the term "between” is intended here to define a spatial arrangement in particular,
  • the lifting element is preferably arranged along the axial direction between the first fastening element and the second fastening element between the first fastening element and the second fastening element, a compact hand-held power tool clamping device can advantageously be achieved.
  • the lifting element is at least partially guided in ring tracks of at least two relatively movable fastening elements.
  • a "ring track” is to be understood here in particular as meaning at least one track which extends along a circumferential direction through 360 °, the track being designed in particular as a groove
  • the thread-like annular paths have a mathematically defined gradient in the axial direction, such that a movement of the lifting element in the annular paths causes a lifting movement along the axial direction
  • a pitch of the annular path of the first fastening element and of the annular path of the second fastening element corresponds in particular to 100 to 150% of the pitch of the thread of the fastening unit and the spindle, preferably 1 to 140% of the pitch of the G ewindes the fastening unit and the spindle and more preferably 120 to 130% of the pitch of the thread of the fastening unit and the spindle.
  • the guidance of the lifting element in an annular path of the first fastening element and in an annular path of the second fastening element can advantageously be a coupling of the first fastening element and the second fastening element.
  • the lifting element is formed by at least one rolling element.
  • the lifting element is formed by a plurality of rolling elements, which are movably mounted in a rolling element cage.
  • the first relative movement between the first fastening element and the second fastening element can advantageously be transferred into the second relative movement with low friction.
  • a long life of the power tool clamping device can be achieved.
  • the process safety unit and the decoupling safety unit have at least one common lifting element.
  • a compact portable power tool clamping device can be achieved particularly advantageously.
  • the invention is also based on a hand tool, in particular an angle grinder, with a hand tool clamping device according to the invention.
  • a hand tool in particular an angle grinder
  • a hand tool clamping device according to the invention.
  • a high degree of operating convenience can be achieved for a user of the handheld power tool.
  • it can advantageously be avoided that a tool runs off the spindle of the handheld power tool.
  • FIG. 1 shows a detailed view of a spindle of the handheld power tool of FIG. 1 with the hand tool clamping device according to the invention arranged on the spindle in a schematic illustration
  • FIG. 4 shows a sectional view along the line V-V from FIG. 4 of the hand-held power tool clamping device according to the invention in a schematic representation
  • FIG. 1 shows a hand tool machine 46a designed as an angle grinder 44a with a hand tool clamping device according to the invention
  • the angle grinder 44a comprises a protective hood unit 48a, a hand tool housing 50a and a main handle 52a, which extends on a side 14a facing away from a tool 14a of the portable power tool housing 50a in the direction of a main extension direction 56a of the angle grinder 44a.
  • the tool 14a is designed here as a grinding wheel. However, it is also conceivable that the tool 14a is formed as a separating or polishing wheel.
  • the hand tool housing 50a comprises a motor housing 58a for receiving an electric motor (not shown here in detail) and a gear housing 60a for receiving a gear (not shown here). On the gear housing 60a an auxiliary handle 62a is arranged on the gear housing 60a.
  • the auxiliary handle 62a extends transversely to the main extension direction 56a of the angle grinder 44a.
  • FIG. 2 shows the hand-held power tool clamping device 10a arranged on a spindle 18a of the angle grinder 44a.
  • the spindle 18a extends perpendicular to the main extension direction 58a from the gear housing 62a (not shown in detail in Figure 2).
  • the spindle 18a has on an outer circumference two flattened areas 64a, which are arranged diametrically and thus form a 2-edge 66a. Only one of the flattenings 64a is shown in FIG.
  • the receiving flange 70a has a recess corresponding to the 2-edge 66a (not shown here in detail), into which the 2-edge 66a engages in an assembled state of the receiving flange 70a.
  • the receiving flange 70a is rotatably connected by means of the 2-edge 66a with the spindle 18a.
  • the receiving flange 70a is arranged in a mounted state on a side facing the angle grinder 44a of the spindle 18a.
  • the spindle 18a is rotatably driven by means of the gear and the electric motor of the angle grinder 44a about a rotation axis 68a of the spindle 18a.
  • the spindle 18a is rotated by the angle grinder 44a in a clockwise direction.
  • the hand tool clamping device is tion 10a in an assembled state also driven in a clockwise rotation.
  • the hand tool clamping device 10a comprises a fastening unit 12a for securing the tool 14a in the axial direction 16a on the spindle 18a.
  • the fastening unit 12a clamps the tool 14a against the receiving flange connected to the spindle 18a in a form-fitting manner
  • the fastening unit 12a comprises a first fastening element 22a, which has a contact surface 76a for abutment against a side of the tool facing away from the receiving flange 70a
  • the abutment surface 76a of the first attachment element 22a and the side of the tool 14a abutting against the abutment surface 76a have an adhesive coating (not shown here), so that a high friction exists between the abutment surface 76a of the first attachment element 22a and the abutment surface 76a of the tool 14a is achievable.
  • the contact surface 76a and the voltage applied to the contact surface 76a side of the tool 14a have a corresponding ramp-like geometry, which engage with each other.
  • the fastening unit 12a comprises a second fastening element 28a, which has an internal thread 74a for screwing with the external thread 72a of the spindle 18a.
  • the tool 14a is clamped by means of the screwing of the fixing unit 12a on the spindle 18a to the receiving flange 70a.
  • Tool 14a on the receiving flange 70a torque can be transmitted from the spindle 18a to the tool 14a.
  • the tool 14a is driven to rotate in a clockwise direction as viewed by the angle grinder 44a in the operation of the angle grinder 44a.
  • In the operating mode of the angle grinder 44 a is a maintenance of a clamping force by means of a
  • the fastening unit 12a further comprises an actuating element 78a.
  • the actuator 78a is annular ( Figure 3).
  • the actuating element 78a has coupling regions 80a, 82a, which are web-shaped.
  • the coupling regions 80a, 82a extend in the direction of the second fastening element 28a along a radial direction 1 14a running perpendicular to a central axis 24a of the actuating element 78a.
  • the second fastening element 28a also has coupling holes 84a, 86a for rotationally fixed coupling to the actuating element 78a.
  • the coupling regions 84a, 86a of the second fastening element 28a extend along the radial direction 1 14a in the direction of the actuating element 22a.
  • a number of the coupling regions 84a, 86a of the second fastening element 28a is dependent on a number of the coupling regions 80a, 82a of the actuating element 78a.
  • the actuating element 78a has two coupling regions 80a, 82a
  • the fastening element 28a also has two coupling regions 84a, 86a.
  • the actuating element 78a and the fastening element 28a to each have a different number of coupling regions 80a, 82a, 84a, 86a which appears expedient to a person skilled in the art (FIG. 4).
  • the hand tool clamping device 10a comprises a
  • Decoupling unit 20a to a decoupling of the first fastening element 22a of the fixing unit 12a in the axial direction 16a.
  • a clamping force of the fastening unit 12a can be reduced so that the fastening unit 12a can be unscrewed from the spindle 18a without tools by an operator.
  • the second fastening element 28a is arranged inside the annular actuating element 78a (FIGS. 4 and 6).
  • the actuating element 78a and the second fastening element 28a each have a groove 120a, 122a in which an O-ring 124a of the fastening unit 12a is arranged.
  • the actuator 78a surrounds the second
  • the first attachment Transmission element 22a is formed substantially disc-shaped and also disposed within the actuating element 78a.
  • the actuating element 78a and the second fastening element 28a each have a groove 128a, 130a in which an O-ring 126a of the fastening unit 12a is arranged.
  • the first fastening element 22a has a ramp-shaped lifting element 34a (FIG. 5).
  • the lifting element 34a is formed integrally with the first fastening element 22a.
  • the first fastening element 22a has two lifting elements 34a formed integrally with the fastening element 22a, wherein only one of the lifting elements 34a is shown in the figures.
  • the lifting elements 34a are arranged offset by approximately 180 ° along the circumferential direction 88a.
  • the second fastening element 28a likewise has two lifting elements 90a, which are formed integrally with the second fastening element 28a.
  • the lifting elements 90a of the second fastening element 28a are arranged offset by approximately 180 ° along the circumferential direction 88a. In the figures, only one of the lifting elements 90a of the second fastening element 28a is shown.
  • the lifting elements 34a of the first fastening element 22a have a pitch which is opposite to the lifting elements 90a of the second fastening element 28a (FIG. 5).
  • the decoupling unit 20a furthermore comprises two lifting elements 36a, 92a, which operatively couple the first fastening element 22a and the second fastening element 28a to one another.
  • the lifting elements 36a, 92a of the decoupling unit 20a are formed in a ramp shape. Furthermore, the lifting elements 36a, 92a of the decoupling unit 20a are arranged between the first fastening element 22a and the second fastening element 28a of the fastening unit 12a. In this case, the lifting elements 36a, 92a of the decoupling unit 20a on a side facing the lifting elements 34a of the first fastening element 22a have a pitch opposite to the lifting elements 34a of the first fastening element 22a.
  • the lifting elements 36a, 92a of the decoupling unit 20a have, on a side facing the lifting elements 90a of the second fastening element 28a, a pitch which is opposite to the lifting elements 90a of the second fastening element 28a (FIG. 5).
  • the lifting elements 36a, 92a of the decoupling unit 20a are movable relative to the first fastening element 22a and relative to the second fastening element
  • the decoupling unit 20a comprises blocking elements 94a, 96a, which prevent a movement of the lifting elements 36a, 92a of the decoupling unit 20a along the circumferential direction 88a.
  • the locking elements 94a, 96a are formed as cylindrical rollers. However, it is also conceivable that the locking elements 94a, 96a are formed in another form that appears appropriate to a person skilled in the art.
  • the decoupling unit 20a has four spring elements 98a, 100a,
  • Two of the spring elements 98a, 100a, 102a, 104a are respectively arranged along the circumferential direction 88a between one of the coupling regions 80a, 82a of the actuating element 78a and one of two web-shaped coupling regions 106a, 108a of the first fastening element 22a.
  • the other two of the spring elements 98a, 100a, 102a, 104a are furthermore respectively arranged between one of the coupling regions 106a, 108a of the first fastening element 22a and one of two limiting elements 162a, 164a of the second fastening element 28a along the circumferential direction 88a (FIG. 4).
  • the spring elements 98a, 100a, 102a, 104a are designed as compression springs. However, it is also conceivable that the spring elements 98a, 100a, 102a, 104a are formed in another manner that appears appropriate to a person skilled in the art.
  • the actuating element 78a Upon actuation of the actuating element 78a for release and / or release screws of the fastening unit 12a, the actuating element 78a is rotated first relative to the first fastening element 22a and relative to the second fastening element 28a.
  • the coupling regions 80a, 82a of the actuating element 78 are hereby moved along the circumferential direction 88a away from the coupling regions 84a, 86a of the second fastening element 28a.
  • the spring elements 98a, 100a, 102a, 104a are compressed in this case.
  • the actuating element 78a further has two decoupling recesses 10a, 12a.
  • the decoupling recesses 10a, 12a are arranged offset by approximately 180 ° along the circumferential direction. Another, to a professional appear appropriate number of decoupling recesses
  • the lifting elements 36a, 92a of the decoupling unit 20a can move along the circumferential direction 88a.
  • the lifting elements 36a, 92a of the decoupling unit 20a slide on the lifting elements 34a of the first fastening element 22a and the lifting elements 90a of the second Fastening element 28a from.
  • the first fastening element 22a moves in the direction of the second fastening element 28a as a result of the sliding of the lifting elements 36a, 92a of the decoupling unit 20a along the axial direction 16a relative to the second fastening element 28a.
  • the angle grinder 44a further includes a braking device (not shown in detail here) to prevent hunting of the spindle 18a in a shutdown of the angle grinder 44a due to an interruption of a power supply. In the shutdown process, the angle grinder 44a switches to a braking operation and brakes the spindle 18a by means of the braking device. in the
  • the tool 14a continues to move due to inertia about the axis of rotation 68a of the spindle 18a, so that a torque difference between the tool 14a, the spindle 18a and the fixing unit 12a is formed.
  • This torque difference leads to a relative movement between the tool 14a and the fixing unit 12a. Due to a friction between the fixing unit 12a and the sluggish tool 14a, a
  • the hand tool tensioning device 10a has a flow safety unit 26a, which is intended to at least partially direct a first relative movement between the first fastening element 22a and the second fastening element 28a of the fastening unit 12a to convert into a second relative movement.
  • the first relative movement between the first fastening element 22a and the second fastening element 28a is a rotation about the axis of rotation 68a.
  • the second relative movement between the first fastening element 22a and the second fastening element 28a is a translation along the axial direction 16a.
  • the rotation between the first fastening element 22a and the second fastening element 28a arises during braking operation from the torque difference between the tool 14a and the fastening unit 12a.
  • the tool 14a rotates the first fastener 22a by the resulting friction between the tool 14a and the abutment surface 76a of the first fastener 22a.
  • the flow assurance unit 26a has a restoring unit 30a, which is provided to automatically return the first fastening element 22a and the second fastening element 28a to a basic position.
  • the return actuator 30a in this case comprises the spring elements 98a, 100a, 102a, 104a of
  • Decoupling unit 20a for recovery.
  • the spring elements 98a, 100a, 102a, 104a rotate the first fastening element 22a, the second fastening element 28a and the actuating element 78a in a substantially unloaded state of the fastening unit 12a relative to one another along the circumferential direction 88a.
  • the blocking elements 94a, 96a of the decoupling unit 20a are removed from the decoupling recesses 110a, 112a. moved.
  • the blocking elements 94a, 96a exert a force on the lifting elements 36a, 92a of the decoupling unit 20a.
  • the lifting elements 36a, 92a of the decoupling unit 20a are thus moved between the lifting elements 34a of the first fastening element 22a and the lifting elements 90a of the second fastening element 28a.
  • a movement of the lifting elements 36a, 92a of the decoupling unit 20a in the direction of the blocking elements 94a, 96a is prevented by means of an interaction of the blocking elements 94a, 96a of the decoupling unit 20a and the coupling regions 84a, 86a of the second fastening element 28a.
  • the decoupling recesses 10a, 12a each have an inclined surface 16a, 18a, which is provided to exert a force component in the direction of the lifting elements 36a, 92a of the decoupling unit 20a on the blocking elements 94a, 96a as a result of a rotational movement of the actuating element 78a.
  • the operation safety unit 26a is designed as a lifting unit 32a, which is provided to move the first fastening element 22a along the axial direction 16a as a result of the first relative movement relative to the second fastening element 28a.
  • the lifting unit 32a comprises the lifting elements 34a, which are formed integrally with the first fastening element 22a.
  • the lifting unit 32a comprises the lifting elements 90a, which are formed integrally with the second fastening element 28a.
  • the lifting unit 32a further comprises the lifting elements 36a, 92a of the decoupling unit 20a, which are movably mounted relative to the first fastening element 22a and relative to the second fastening element 28a.
  • the flow assurance unit 26a and the decoupling unit 20a has two common lifting elements 36a, 92a.
  • the first fastening element 22a is rotated along the circumferential direction 88a relative to the second fastening element 28a due to friction and a torque difference between the tool 14a and the first fastening element 22a.
  • the first fastening element 22a is moved counter to a spring force of the spring elements 98a, 100a, which are arranged between the coupling regions 106a, 108a of the first fastening element 22a and the boundary elements 162a, 164a of the second fastening element 28a.
  • the blocking elements 94a, 96a prevent a movement of the lifting elements 36a, 92a of the lifting unit 32a, so that the lifting elements 34a of the first fastening element 22a can slide on the lifting elements 36a, 92a of the lifting unit 32a.
  • the first fastening element 22a is moved along the axial direction 16a in the direction of the tool 14a as a result of the pitch of the lifting elements 34a of the first fastening element 22a relative to the second fastening element 28a.
  • a clamping force acting on the tool 14a can be maintained or increased, so that a run-off of the fastening unit and / or the tool 14a from the spindle 18a can be prevented.
  • the operating member 78a is operated by the operator. As a result, as already described above, a clamping force is reduced so that an operator can easily detach the fixing unit.
  • the hand tool clamping device 10a further comprises a friction reducing element disposed in the fixing unit 12a.
  • a friction reducing element disposed in the fixing unit 12a.
  • the friction-reducing element can be introduced into the fastening unit 12a in the liquid state, or the friction-reducing element is applied as coatings, such as Teflon coatings, to components of the fastening unit 12a that are movably mounted to one another.
  • FIGS. 6 to 9 show two alternative embodiments. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, the letters a to c are added to the reference numerals of the embodiments. The following description is essentially limited to the differences from the first exemplary embodiment in FIGS. 1 to 5, wherein reference can be made to the description of the first exemplary embodiment in FIGS. 1 to 5 with regard to components, features and functions remaining the same.
  • FIG. 6 shows an alternative hand tool clamping device 10b with a fastening unit 12b for securing a tool 14b in the axial direction 16b on a spindle 18b of a hand tool 46b designed as an angle grinder 44b.
  • the angle grinder 44b in this case has an analogous to the angle grinder 44a shown in Figure 1 construction.
  • the hand tool clamping device 10b has a decoupling unit 20b for decoupling a first fastening element 22b of the fastening unit 12b in the axial direction 16b (FIG. 7).
  • the decoupling unit 20b has three lifting elements 132b, 134b, 136b (FIG. 8).
  • the three lifting elements 132b, 134b, 136b are movably mounted along a radial direction 1 14b.
  • the decoupling unit 20b further comprises three blocking elements 94b, 96b, 138b, which are provided to substantially prevent a movement of the three lifting elements 132b, 134b, 136b in at least one operating position in the radial direction 1 14b.
  • 1 14b in one of three decoupling recesses 1 10b, 1 12b, 140b allows. If the three blocking elements 94b, 96b, 138b are each in one of the three decoupling recesses 1 10b, 1 12b, 140b, the lifting elements 132b, 134b, 136b of the decoupling unit 20b can execute a movement in the radial direction 14b. The first fastening element 22b can after movement of the
  • Lifting elements 132b, 134b, 136b of the decoupling unit 20b in the radial direction 1 14b move relative to the second fastening element 28b.
  • the movement of the lifting elements 132b, 134b, 136b of the decoupling unit 20b in the radial direction 1 14b and the movement of the first fastening element 22b along the axial direction 16b result in a clamping force of an internal thread 74b of a second fastening element 28b and an external thread 72b of the spindle 18b is reduced. An operator can thus loosen the fastening unit 12b without tools from the spindle 18b.
  • the handheld power tool tensioning device 10b has a run-off securing unit 26b which, in order to avoid running off the fastening unit 12b and / or the tool 14b from the spindle 18b in a braking operation, at least partially effects a first relative movement between the first fastening element 22b and a second fastening - To transfer element 28 b of the fastening unit 12 b in a second relative movement.
  • the flow assurance unit 26b comprises a reset unit 30b, which is provided to automatically return the first fastening element 22b to a basic position.
  • the restoring unit 30b here has a spring element 142b.
  • the spring element 142b is designed as a wire spring. One end of the spring member 142b is connected to the first attachment member 22b.
  • the opposite end of the spring element 142b is connected to a carrier element 144b of the flow assurance unit 26b.
  • the spring element 142b thus effects a return of the first fastening element 22b relative to the carrier element 144b.
  • the run-down protection unit 26b is designed as a lifting unit 32b, which is provided to move the first fastening element 22b along the axial direction 16b as a result of the first relative movement relative to the second fastening element 28b.
  • the lifting unit 32b has four lifting elements 34b, 90b (shown two in FIG. 7), which are formed integrally with the first fastening element 22b.
  • the lifting unit has four further lifting elements 36b, 92b, 158b, 160b, which are formed integrally with the carrier element 144b.
  • the support member 144b is formed along the axial direction 16b between the first attachment member 22b and the second attachment member 28b.
  • the support member 144b is movably supported relative to the first attachment member 22b and relative to the second attachment member 28b.
  • the further lifting elements 36b, 92b, 158b, 160b of the support element 144b are also movably mounted relative to the first fastening element 22b and relative to the second fastening element 28b.
  • the lifting elements 34b, 90b of the first fastening element 22b and the lifting elements 36b, 92b, 158b, 160b of the support element 144b are each formed in a ramp shape.
  • the lifting elements 34b, 90b of the first fastening element 22b have a pitch opposite to the lifting elements 36b, 92b, 158b, 160b of the carrier element 144b.
  • FIG. 9 shows a further alternative hand tool clamping device
  • the decoupling unit 20c has a construction analogous to the decoupling unit 20b, so that with regard to a functionality On the basis of decoupling unit 20c, reference is made to the description of FIGS. 6 to 8.
  • the hand tool clamping device 10c has a run-off securing unit 26c which, in order to avoid running off the fastening unit 12c and / or the tool 14c from the spindle 18c in a braking operation, at least partially effects a first relative movement between the first fastening element 22c and a second fastening element 28c to transfer the fastening unit 12c in a second relative movement.
  • the flow assurance unit 26c comprises a reset unit 30c, which is provided to automatically return the first fastening element 22c to a basic position.
  • the anti-dropping unit 26c is configured as a lifting unit 32c, which is provided to move the first fastening element 22c along the axial direction 16c as a result of the first relative movement relative to the second fastening element.
  • the lifting unit 32c in this case has a lifting element 36c, which is movably mounted relative to the first fastening element 22c and relative to the second fastening element 28c.
  • the lifting element 36c here is guided in an annular path 38c of the first fastening element 22c and in an annular path 40c of the second fastening element 28c.
  • the lifting element 36c is formed as a rolling element 42c.
  • the rolling element 42c includes a cage 146c and a plurality of balls 148c, 150c, 152c, 154c supported in the cage 146c.
  • the rolling element 42 is arranged along a radial direction 1 14c, which runs perpendicular to the axial direction 16c, between the first fastening element 22c and the second fastening element 28c.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Portable Power Tools In General (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne un dispositif de serrage pour machine-outil à main, comprenant au moins une unité de fixation (12a; 12b; 12c) pour bloquer un outil (14a; 14b; 14c) contre une broche (18a; 18b; 18c) dans la direction axiale (16a; 16b; 16c), et au moins une unité de découplage (20a; 20b; 20c) pour découpler au moins un élément de fixation (22a; 22b; 22c) de l'unité de fixation (12a; 12b; 12c) dans la direction axiale (16a; 16b; 16c). Selon l'invention, le dispositif de serrage pour machine-outil à main comprend une unité de sécurité par serrage imperdable (26a; 26b; 26c) qui est destinée à empêcher que l'unité de fixation (12a; 12b; 12c) et/ou l'outil (14a; 14b; 14c) ne de détache(nt) de la broche (18a; 18b; 18c) en mode de freinage, et qui convertit au moins partiellement un premier mouvement relatif entre au moins deux éléments de fixation (22a, 28a; 22b, 28b; 22c, 28c) de l'unité de fixation (12a; 12b; 12c) en un deuxième mouvement relatif.
PCT/EP2011/066565 2010-10-29 2011-09-23 Dispositif de serrage pour machine-outil à main WO2012055650A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
RU2013124410/02A RU2587366C2 (ru) 2010-10-29 2011-09-23 Зажимное устройство ручной машины и ручная машина
JP2013535337A JP5657126B2 (ja) 2010-10-29 2011-09-23 手持ち式工作機械締付け装置
EP11761068.3A EP2632634B1 (fr) 2010-10-29 2011-09-23 Dispositif de serrage pour une machine-outil portative

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010043186A DE102010043186A1 (de) 2010-10-29 2010-10-29 Handwerkzeugmaschinenspannvorrichtung
DE102010043186.9 2010-10-29

Publications (1)

Publication Number Publication Date
WO2012055650A1 true WO2012055650A1 (fr) 2012-05-03

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EP (1) EP2632634B1 (fr)
JP (1) JP5657126B2 (fr)
DE (1) DE102010043186A1 (fr)
RU (1) RU2587366C2 (fr)
WO (1) WO2012055650A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017103003A1 (de) * 2017-02-15 2018-08-16 Metabowerke Gmbh Verfahren zum Abbremsen einer Werkzeugspindel
DE102017218622A1 (de) * 2017-04-12 2018-10-18 Robert Bosch Gmbh Schleifmittelvorrichtung, insbesondere Schleiftellervorrichtung oder Stütztellervorrichtung
DE102018115303A1 (de) 2018-06-26 2020-01-02 C. & E. Fein Gmbh Getriebekopf und Handwerkzeugmaschine
DE102018127501A1 (de) 2018-11-05 2020-05-07 C. & E. Fein Gmbh EC-Motor für ein elektrisches Handwerkzeug sowie Verfahren zur Herstellung eines Rotors für einen EC-Motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705638C1 (de) * 1987-02-21 1988-09-08 Bosch Gmbh Robert Spanneinrichtung zum axialen Festspannen eines scheibenfoermigen Werkzeuges,insbesondere einer Schleifscheibe,an einem Flansch einer angetriebenen Spindel
DE3824040C1 (en) 1987-02-21 1989-11-23 Robert Bosch Gmbh, 7000 Stuttgart, De Clamping device for axially clamping a tool, in particular a disk
WO2005016594A1 (fr) * 2003-08-18 2005-02-24 Robert Bosch Gmbh Machine-outil portative
EP2123380A1 (fr) * 2007-01-09 2009-11-25 Makita Corporation Dispositif de fixation pour outil à lame tournante

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1819481B1 (fr) * 2004-12-01 2015-05-13 Rhodius Schleifwerkzeuge GmbH & Co. KG Dispositif pour operations de separation et de polissage, dispositif de fixation et outil rotatif, a amortissement de vibrations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705638C1 (de) * 1987-02-21 1988-09-08 Bosch Gmbh Robert Spanneinrichtung zum axialen Festspannen eines scheibenfoermigen Werkzeuges,insbesondere einer Schleifscheibe,an einem Flansch einer angetriebenen Spindel
DE3824040C1 (en) 1987-02-21 1989-11-23 Robert Bosch Gmbh, 7000 Stuttgart, De Clamping device for axially clamping a tool, in particular a disk
WO2005016594A1 (fr) * 2003-08-18 2005-02-24 Robert Bosch Gmbh Machine-outil portative
EP2123380A1 (fr) * 2007-01-09 2009-11-25 Makita Corporation Dispositif de fixation pour outil à lame tournante

Also Published As

Publication number Publication date
RU2587366C2 (ru) 2016-06-20
RU2013124410A (ru) 2014-12-10
EP2632634A1 (fr) 2013-09-04
JP2014500803A (ja) 2014-01-16
JP5657126B2 (ja) 2015-01-21
EP2632634B1 (fr) 2021-04-21
DE102010043186A1 (de) 2012-05-03

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