WO2012126543A1 - Dispositif de serrage pour machine-outil - Google Patents

Dispositif de serrage pour machine-outil Download PDF

Info

Publication number
WO2012126543A1
WO2012126543A1 PCT/EP2011/073897 EP2011073897W WO2012126543A1 WO 2012126543 A1 WO2012126543 A1 WO 2012126543A1 EP 2011073897 W EP2011073897 W EP 2011073897W WO 2012126543 A1 WO2012126543 A1 WO 2012126543A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
machine tool
hollow shaft
clamping element
clamping device
Prior art date
Application number
PCT/EP2011/073897
Other languages
German (de)
English (en)
Inventor
Joerg Dehde
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 WO2012126543A1 publication Critical patent/WO2012126543A1/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
    • B24B23/022—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
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating 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
    • 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

Definitions

  • Machine tool clamping devices which comprise a clamping unit.
  • the clamping unit has a clamping element for clamping a machining tool in an axial direction, an operating unit for actuating the clamping element and a clamping head arranged on the clamping element.
  • the invention is based on a machine tool clamping device, in particular of a hand tool clamping device, with at least one clamping unit having at least one clamping element for clamping a machining tool in an axial direction, at least one operating unit for actuating the clamping element and at least one clamping head arranged on the clamping element.
  • the machine tool clamping device has at least one setting unit, which is intended to achieve a change in position of a clamping surface of the clamping head to achieve an axial overlap.
  • a “clamping unit” is to be understood here as meaning, in particular, a unit which secures a machining tool along the axial direction by means of a positive connection and / or by means of a frictional connection Pivot axis and / or axis of rotation provided for driving the machining tool Drive shaft of a portable machine tool runs.
  • substantially parallel is to be understood here in particular as 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 particularly advantageous
  • the term "operating unit” should in particular define a unit which has at least one operating element which can be actuated directly by an operator and which is provided by actuation and / or by input of parameters Process and / or affect a state of a unit coupled to the control unit and / or change.
  • a “clamping head” is to be understood here in particular as a component which has at least one clamping surface which bears against the clamping of the machining tool in the axial direction at least on a partial surface of the machining tool and acts on the machining tool with a clamping force along the axial direction
  • a unit which is provided to change and / or set at least one value of a system, in particular at least one location coordinate for defining a position and / or position of the clamping head relative to a hollow shaft.
  • axial overlap is intended here to define, in particular, an overlap, in particular of partial areas, of at least two components along the axial direction, in particular a straight line along the axial direction intersects the two components
  • the clamping surface of the clamping head covers at least a portion of the machining tool along the axial direction
  • the overlapping in a mounted state of the clamping head can be temporarily canceled, in particular for changing the machining tool and / or for changing the position of the machining tool
  • the machine tool clamping device can advantageously be achieved without tools clamping and / or releasing the machining tool.
  • the clamping element is pivotally mounted.
  • the clamping element is at least pivotably mounted about a pivot axis along a bending range of less than 360 °, in particular less than 180 ° and particularly preferably less than 60 °.
  • the clamping element is pivotally mounted in a hollow shaft of the clamping unit.
  • the hollow shaft in this case preferably has a recess along a longitudinal axis of the hollow shaft, which is intended to receive the clamping element.
  • the longitudinal axis is particularly advantageous coaxial with a rotational axis of the hollow shaft. It can be advantageously achieved a compact arrangement.
  • the hollow shaft is designed as a drive shaft, which is intended to drive the machining tool in an assembled state.
  • the hollow shaft is provided to oscillate the machining tool by means of an interaction with a drive unit and / or a gear unit in an assembled state. It can be advantageous in addition to an abutment function of the hollow shaft for clamping the machining tool another function by the design of the hollow shaft as the drive shaft, in particular a drive function for the machining tool, can be achieved.
  • a pivot axis of the clamping element is arranged eccentrically to a rotational axis of the hollow shaft.
  • the clamping head is arranged eccentrically on the clamping element.
  • the clamping head is arranged eccentrically on the clamping element and the pivot axis of the clamping element is coaxial with the axis of rotation.
  • the additional eccentric arrangement of the pivot axis of the clamping element can advantageously be achieved a double eccentric.
  • the eccentric arrangement of the pivot axis of the clamping element and the eccentric arrangement of the clamping head on the clamping element by means of a small pivoting movement advantageously a large overlap of the machining tool and the clamping head for clamping the machining tool can be achieved.
  • the clamping head is formed integrally with the clamping element.
  • in one piece should be understood in particular to be at least materially bonded, for example by a welding process, an adhesive process, an injection process and / or another process that appears expedient to a person skilled in the art, and / or advantageously shaped in one piece, for example
  • the clamping head by means of a positive and / or non-positive connection, in particular rotationally fixed, with the By means of the one-piece design of the clamping head with the clamping element, installation effort and costs can advantageously be saved.
  • the machine tool clamping device comprises at least one spring element which is provided, at least the
  • a “spring element” is to be understood in particular as a macroscopic element which has at least an extension which in a normal operating state is at least 10%, in particular at least 20%, preferably at least 30% and particularly advantageously at least 50% elastic
  • a maximum distance between two points of a vertical projection of the element onto a plane is intended to mean an "extension" of an element be understood.
  • a "macroscopic element” is to be understood as meaning, in particular, an element with an extension of at least 1 mm, in particular of at least 5 mm and preferably of at least 10 mm,
  • the spring element is designed as a clamping disk
  • the spring element has another, a skilled person appear appropriate design, such as a compression spring, a tension spring, etc. It can be structurally simple means of a Spring force of the spring element, a clamping force for clamping the machining tool can be generated.
  • the machine tool clamping device comprises at least one latching device which is provided to fix the clamping element and / or the clamping head in at least one pivoting position.
  • a “locking device” is to be understood here as meaning, in particular, a device which secures the clamping element and / or the clamping head in a predetermined operating position, in particular in a predetermined rotational position, by means of a positive and / or non-positive connection and / or the clamping head from a clamping position and / or release position are at least substantially prevented.
  • the invention is further based on a portable power tool, in particular a hand tool with an oscillating drivable spindle, with a machine tool clamping device according to the invention.
  • a "portable power tool” is to be understood here in particular as meaning a power tool, in particular a power tool, which can be transported by an operator so that it can not be transported Particularly preferably less than 5 kg, it can advantageously be achieved a high ease of use for an operator of the power tool.
  • FIG. 1 shows a machine tool according to the invention with a machine tool clamping device according to the invention in a schematic representation
  • FIG. 2 is a sectional view along the line II-II of Figure 1 of the machine tool according to the invention in a schematic representation
  • FIG. 3 is a detailed view of the machine tool clamping device according to the invention in a schematic representation
  • FIG. 4 shows a further detailed view of the machine tool clamping device according to the invention with a mounted machining tool in a schematic representation
  • FIG. 5 shows a further detailed view of the machine tool clamping device according to the invention in a schematic representation.
  • FIG. 1 shows an electrically operated portable power tool 40 having a
  • the portable machine tool 40 includes a machine tool housing 42 that encloses an electric motor unit 44, a gear unit 46, and an output unit 48 of the portable power tool 40.
  • the machine tool housing 42 in this case comprises two housing half-shells 50, 52 which are releasably connected to each other along a plane passing through an axial direction 18 level.
  • the axial direction 18 extends along an axis of rotation 34 of a hollow shaft 28 of the output unit 48 (FIG. 2) designed as a spindle 54.
  • the hollow shaft 28 is formed as a drive shaft 30, which is intended to drive a machining tool 16 in an assembled state.
  • the machining tool 16 can be fastened to a tool holder 56 of the output unit 48 for machining workpieces.
  • the tool holder 56 is formed integrally with the hollow shaft 28. Thus, a pivoting movement of the hollow shaft 28 can be transmitted to the tool holder 56 ( Figure 2). However, it is also conceivable that the tool holder 56 formed by a hollow shaft 28 separately Part is formed, which is non-rotatably connected by means of a positive and / or non-positive connection with the hollow shaft 28.
  • FIG. 2 shows a sectional view through the portable machine tool 40 along the line II-II from FIG. 1.
  • the electric motor unit 44 arranged in the machine tool housing 42 comprises an output shaft 58, which is mounted in the machine tool housing 42 by means of a ball bearing 60 of the gear unit 46.
  • an eccentric sleeve 62 of the gear unit 46 is pressed, which comprises a pin 66 eccentrically arranged to a rotation axis 64 of the output shaft 58.
  • the pin 66 is connected via a further ball bearing 68 of the gear unit 46 with a rocker 70 of the gear unit 46, which is non-rotatably connected to an outer ring of the other ball bearing 68.
  • the rocker 70 in turn is connected to an arranged on the hollow shaft 28 of the oscillating sleeve 72 of the gear unit 46.
  • Rocker 70 and the oscillating sleeve 72 generates an oscillating pivotal movement of the hollow shaft 28 about the axis of rotation 34.
  • the hollow shaft 28 is mounted in the tool-machine housing 42 by a movable bearing configured as a needle bearing 74 of the output unit 48 and by a fixed bearing designed as a ball bearing 76 of the output unit 48.
  • the oscillating pivoting movement of the hollow shaft 28 is transmitted via the tool holder 56 to the machining tool 16.
  • the machining tool 16 has entrainment recesses 78, which are arranged uniformly distributed on a machining tool 16 in a circular ring along a circumferential direction 80.
  • the tool holder 56 has with the driving recesses 78 corresponding hump-like elevations 82, which extend in an assembled state of the machining tool 16 on the tool holder 56 along the axial direction 18 through the driving recesses 78 therethrough.
  • the hump-like elevations 82 are formed here as locking cams 84.
  • the portable machine tool 40 comprises the machine tool clamping device 10.
  • the machine tool clamping device 10 comprises a clamping unit 12 which has a clamping element 14 for clamping the machining tool 16 in the axial direction 18 and a clamping head 22 arranged on the clamping element 14. has.
  • the clamping element 14 is pivotally mounted.
  • the clamping element 14 is in this case pivotally mounted in the hollow shaft 28 of the clamping unit 12.
  • the clamping element 14 has a greater extent than the hollow shaft 28.
  • the clamping element 14 extends through the hollow shaft 28 therethrough. In this case, the clamping element 14 extends beyond the hollow shaft 28 at an end of the hollow shaft 28 facing the machining tool 16. At a side facing away from the machining tool 16 end of the hollow shaft 28, the clamping element 14 also extends beyond the hollow shaft 28 also.
  • the clamping unit 12 has an operating unit 20 for actuating the clamping element 14.
  • the operating unit 20 comprises for actuating the clamping unit 12, an operating lever 86 which is rotatably mounted about a coaxially to the axis of rotation 34 of the hollow shaft 28 extending axis of rotation.
  • the operating lever 86 is additionally mounted pivotably about an at least substantially perpendicular to the axial direction 18 extending pivot axis.
  • the operating lever 86 can be connected for clamping and / or for releasing the machining tool 16 with a coupling element 88 of the operating unit.
  • the operating lever 86 is in a clamping mode for clamping and / or in a release mode for releasing the machining tool 16 rotatably with the
  • Coupling element 88 connected.
  • the operating lever 86 is decoupled from the coupling element 88.
  • the operating lever 86 is decoupled in the decoupling mode of an oscillating pivotal movement of the hollow shaft 28 and the coupling member 88.
  • the coupling and / or decoupling of the operating lever 86 with the coupling element 88 can be achieved, for example, by means of a coupling mechanism (not shown here), which is provided to move the operating lever 86 along the axial direction 18 and thus the operating lever 86 of the coupling element 88 to decouple and / or to couple with the coupling element 88.
  • the operating lever 86 may in this case latching elements (not shown here), which engage in corresponding locking elements (not shown here) of the coupling element 88.
  • the coupling element 88 has a recess 90 which is provided to receive an end of the clamping element 14 facing away from the machining tool 16.
  • two grooves 92 are arranged (only one groove shown in FIG. 2).
  • the grooves 92 are in the recess 90, viewed along the circumferential direction 80, evenly spaced.
  • the grooves 92 within the recess 90 along the circumferential direction 80 are arranged offset by 180 ° to each other. Furthermore, the grooves 92 are provided to receive an axial securing element 94 of the clamping unit 12. In this case, two mutually opposite ends of the axial securing element 94 each engage in a groove 92 in an assembled state. The two ends of the axial securing element 94 may in this case move in a direction perpendicular to the axial direction 18 in the grooves 92 in order to allow a pivoting movement of the clamping element 14.
  • the Axialommeselement 94 is formed as a transverse pin 96 which is mounted perpendicular to a pivot axis 32 of the clamping element 14 in the clamping element 14.
  • the transverse pin 96 is provided to secure the clamping element 14 axially in the hollow shaft 28.
  • the machine tool clamping device 10 comprises a spring element 36, which is provided to bias the clamping element 14 along the axial direction 18.
  • the spring element 36 is arranged in the recess 90 of the coupling element 88. Furthermore, the spring element 36 as
  • Clamping disc 98 is formed, which is supported with one side on the transverse pin 96 and with another side on the hollow shaft 28.
  • a spring force of the tension pulley 98 for generating a clamping force for tightening the machining tool 16 along the axial direction 18 is generated.
  • the spring element 36 is formed as a compression spring, which is supported with one end on the transverse pin 96 and with another end on an inner wall of the recess 90 of the coupling element 88.
  • the machine tool clamping device 10 has an adjustment unit 24, which is intended to achieve a change in position of a clamping surface 26 of the clamping head 22 in order to achieve an axial overlap (FIGS. 4 and 5).
  • the adjusting unit 24 in this case comprises the clamping element 14, the clamping head 22 and the hollow shaft 28.
  • the pivot axis 32 of the clamping element 14 is arranged eccentrically to the axis of rotation 34 of the hollow shaft 28.
  • the 28 has an axial recess 102 which extends along an axial first Cung of the hollow shaft 28 along the axial direction 18 through the hollow shaft 28 extends.
  • the axial recess 102 has a bearing region 104, which is provided to support the tensioning element 14 (FIG. 5).
  • the clamping element 14 is held in a form-fitting manner in the bearing area 104.
  • the axial recess 102 has a pivoting region 106 which defines an angular range along which the tensioning element 14 is pivotable (FIG. 5).
  • the clamping element 14 has a bearing section 108, which is arranged in an assembled state of the clamping element 14 in the bearing area 104 of the hollow shaft 28.
  • the clamping element 14 has two sliding portions 1 10, 1 12, which are arranged in an assembled state of the clamping element 14 in the pivoting portion 106 of the hollow shaft ( Figure 5).
  • the sliding portions 1 10, 1 12 are provided to slide at a pivoting movement of the clamping element 14 on an inner wall 114 delimiting the pivoting region 106 of the axial recess 102 of the hollow shaft 28.
  • the sliding portions 110, 112 are arranged on opposite ends of the bearing portion 108 of the clamping element 14.
  • the bearing portion 108 and the two sliding portions 110, 112 are integrally formed.
  • the chuck 22 is formed integrally with the clamping element 14.
  • the clamping head 22 is integrally formed with one of the two sliding portions 110, 112 of the clamping element 14.
  • the clamping head 22 is arranged eccentrically on the clamping element 14. Furthermore, the clamping head 22, viewed along a direction perpendicular to the axial direction 18 direction, a dimension which is smaller than a dimension of a recess of the machining tool 16, by means of which the machining tool 16 for attachment to the tool holder 56 via the clamping head 22 can be pushed.
  • the machine tool clamping device 10 also has a latching device 38, which is provided to fix the clamping element 14 and / or the clamping head 22 in at least one pivotal position.
  • the latching device 38 is arranged on a hollow tool 28 facing away from the machining tool 16 on the hollow shaft 28.
  • the latching device 38 comprises latching recesses 16, 118 into which the transverse pin 96 can engage as a result of a pivoting movement of the clamping element 14 (FIG. 3).
  • the hollow shaft 28 further comprises a ramp-like clamping portion 100, which is provided to generate a clamping force in the clamping element 14 as a result of a pivoting movement.
  • the clamping section 100 is in this case arranged on the end of the hollow shaft 28 facing away from the machining tool 16 (FIG. 3).
  • FIG. 3 shows the machine tool clamping device 10, wherein the clamping unit 12 is in the release mode.
  • the clamping unit 12 is also shown in dashed lines in the clamping mode in Figure 3.
  • the clamping element 14 is in this case rotated by an operator of an interaction of the operating lever 86 and the coupling element 88.
  • the transverse pin 96 is moved by means of the pivoting movement of the clamping element 14 to achieve the clamping mode of the recess 116 in which the transverse pin 96 engages in the release mode. Further, the cross pin 96 moves along the circumferential direction 80 on the clamping portion 100 and along the circumferential direction 80 over the clamping portion 100 of time.
  • FIG. 4 shows a position of the clamping head 22 in the release mode of the clamping unit 12.
  • a position of the clamping head 22 in the clamping mode is shown here by dashed lines.
  • an operator can change the machining tool 16 (shown in dashed lines in FIG. 4) and / or change an angular position of the machining tool 16 relative to the hollow shaft 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

L'invention porte sur un dispositif de serrage pour machine-outil, en particulier sur un dispositif de serrage pour machine-outil à main comprenant au moins une unité de serrage (12) qui présente au moins un élément de serrage (14) pour exécuter un serrage d'immobilisation d'un outil d'usinage (16) dans une direction axiale (18), au moins une unité de commande (20) destinée à actionner l'élément de serrage (14) ainsi qu'au moins une tête de serrage (22) associée à l'élément de serrage (14). Selon l'invention, le dispositif de serrage de machine-outil présente au moins une unité de réglage (24) qui est agencée pour permettre d'obtenir une modification de la position d'une surface de projection axiale (26) de la tête de serrage (22) pour obtenir un recouvrement axial.
PCT/EP2011/073897 2011-03-18 2011-12-23 Dispositif de serrage pour machine-outil WO2012126543A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110005818 DE102011005818A1 (de) 2011-03-18 2011-03-18 Werkzeugmaschinenspannvorrichtung
DE102011005818.4 2011-03-18

Publications (1)

Publication Number Publication Date
WO2012126543A1 true WO2012126543A1 (fr) 2012-09-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/073897 WO2012126543A1 (fr) 2011-03-18 2011-12-23 Dispositif de serrage pour machine-outil

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DE (1) DE102011005818A1 (fr)
WO (1) WO2012126543A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9073195B2 (en) 2010-04-29 2015-07-07 Black & Decker Inc. Universal accessory for oscillating power tool
US8925931B2 (en) 2010-04-29 2015-01-06 Black & Decker Inc. Oscillating tool
JP5746645B2 (ja) 2012-02-03 2015-07-08 株式会社マキタ 作業工具
USD832666S1 (en) 2012-07-16 2018-11-06 Black & Decker Inc. Oscillating saw blade
DE202013006900U1 (de) 2013-08-01 2014-11-03 C. & E. Fein Gmbh Werkzeugmaschine
NO2884309T3 (fr) * 2013-08-01 2018-09-08
DE202013006920U1 (de) 2013-08-01 2014-11-03 C. & E. Fein Gmbh Werkzeugeinrichtung
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
JP7096032B2 (ja) 2018-03-28 2022-07-05 株式会社マキタ マルチツール
US11590593B2 (en) 2019-11-28 2023-02-28 Makita Corporation Power tool
US11660690B2 (en) 2019-11-28 2023-05-30 Makita Corporation Power tool
JP7422538B2 (ja) 2019-12-26 2024-01-26 株式会社マキタ 作業工具
JP7330914B2 (ja) 2020-02-13 2023-08-22 株式会社マキタ 振動工具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1405308A (en) * 1921-03-12 1922-01-31 Matrazzo Anthony Polishing device
US4497141A (en) * 1983-05-31 1985-02-05 Sven Jarby Smoothing, cutting and polishing tool
EP0147545A2 (fr) * 1983-12-21 1985-07-10 C. & E. FEIN GmbH & Co. Dispositif pour fixer de préférence un disque à meuler de façon démontable sur une machine portative à moteur
EP0495181A1 (fr) * 1991-01-16 1992-07-22 C. & E. FEIN GmbH & Co. Meuleuse portative avec dispositif d'accouplement rapide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1405308A (en) * 1921-03-12 1922-01-31 Matrazzo Anthony Polishing device
US4497141A (en) * 1983-05-31 1985-02-05 Sven Jarby Smoothing, cutting and polishing tool
EP0147545A2 (fr) * 1983-12-21 1985-07-10 C. & E. FEIN GmbH & Co. Dispositif pour fixer de préférence un disque à meuler de façon démontable sur une machine portative à moteur
EP0495181A1 (fr) * 1991-01-16 1992-07-22 C. & E. FEIN GmbH & Co. Meuleuse portative avec dispositif d'accouplement rapide

Also Published As

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