EP1414620B1 - System mit einer werkzeugaufnahme - Google Patents

System mit einer werkzeugaufnahme Download PDF

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Publication number
EP1414620B1
EP1414620B1 EP02750812A EP02750812A EP1414620B1 EP 1414620 B1 EP1414620 B1 EP 1414620B1 EP 02750812 A EP02750812 A EP 02750812A EP 02750812 A EP02750812 A EP 02750812A EP 1414620 B1 EP1414620 B1 EP 1414620B1
Authority
EP
European Patent Office
Prior art keywords
application tool
tool
hub
holding fixture
sheet metal
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.)
Expired - Lifetime
Application number
EP02750812A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1414620A1 (de
Inventor
Harald Krondorfer
Markus Heckmann
Thomas Schomisch
Johann Huber
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.)
Tyrolit-Schleifmittelwerke Swarovski KG
Robert Bosch GmbH
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski KG
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 Tyrolit-Schleifmittelwerke Swarovski KG, Robert Bosch GmbH filed Critical Tyrolit-Schleifmittelwerke Swarovski KG
Publication of EP1414620A1 publication Critical patent/EP1414620A1/de
Application granted granted Critical
Publication of EP1414620B1 publication Critical patent/EP1414620B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material
    • B24D9/085—Devices for mounting sheets on a backing plate
    • 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
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type

Definitions

  • the invention is based on a system with a tool holder according to the preamble of claim 1, such a device is known from DE 1 577 422.
  • a system with a tool holder which has a driving device, via which an insert tool with a drive shaft via a movable against a spring element mounted plug element is operatively connected.
  • the plug element fixes the insert tool positively in an operating position.
  • the grinding machine tool holder has a driver and a clamping nut. To mount the grinding wheel of the driver is pushed with a mounting hole on a collar of the drive shaft and clamped over the clamping nut frictionally against a bearing surface of the drive shaft.
  • the driver has a tool side in the axial direction extending collar radially on two opposite Has sides on its outer circumference recesses which extend in the axial direction to a bottom of the collar. Starting from the recesses extending against the drive direction of the drive shaft in each case a groove on the outer circumference of the collar. The grooves are closed against the drive direction of the drive shaft and taper axially from the recesses against the drive direction of the drive shaft.
  • the grinding wheel has a hub with a mounting opening in which two opposite, radially inwardly pointing tongues are arranged.
  • the tongues can be introduced into the recesses in the axial direction and then into the grooves in the circumferential direction, counter to the drive direction.
  • the grinding wheel is positively connected via the tongues in the grooves in the axial direction and frictionally fixed by the tapered contour of the grooves. During operation, the adhesion increases due to acting on the grinding wheel reaction forces acting counter to the drive direction.
  • a stopper is arranged in the region of a recess on the circumference of the collar and is movably mounted in an opening in the axial direction. In a working position pointing downwards with the grinding wheel, the stopper is deflected by gravity axially in the direction of the grinding wheel, closes the groove in the direction of the recess and blocks movement of the tongue located in the groove in the drive direction of the drive shaft.
  • the invention relates to a system with a tool holder, which has a driving device, via which an insert tool with a drive shaft is operatively connected, and with an insertion tool.
  • the insertion tool via at least one movable against a spring element locking element with the driving device is connected, which engages in an operating position of the insert tool and the insert tool fixed positively, at least at the tool holder at least a part of a means for avoiding a reversed mounting of the insert tool is mounted.
  • Damaging or destroying insert tools, in particular rotationally bound diamond cutting discs can advantageously be avoided and damage to the hand tool machine during normal operation by the reversed assembly can be prevented.
  • portable power tools whose insert tool with a quick-release system can be particularly quickly and easily mounted or replaced, it is particularly important that an insecure attachment of the insert tool caused by a wrong-side incorrect assembly is avoided.
  • the entrainment device has at least one functional element which forms at least part of the agent.
  • Existing components can be used advantageously and additional components for the realization of the agent can be avoided.
  • the means may be formed in various ways, for example, the means may be formed by a specially shaped clamping hook, which blocks a rotational movement required for complete assembly in a reversed mounting of the insert tool.
  • the coding can be formed by various components that appear appropriate to the person skilled in the art. However, the coding is particularly advantageously formed at least in part by a functional element, such as, for example, a tensioning hook or a detent element which secures the insertion tool in the circumferential direction.
  • the functional element in the direction of insertion tool has a projection surface which is asymmetrical to an axis perpendicularly intersecting a rotation axis of the insert tool, wherein the insert tool has one of the projection at least partially corresponding, corresponding to the functional element recess ,
  • the insert tool has a disc-shaped hub formed by a separate component. It can be achieved a hub that is inexpensive and easy to produce.
  • the hub can be made of a special material, in particular of a metal sheet, so that particularly simple and inexpensive, e.g. with a punching method, a corresponding with the functional element recess can be accurately introduced.
  • the hub may be formed of other materials which the person skilled in the art would consider useful, such as e.g. made of a plastic, a glass fiber, a composite, etc. and / or may also be integrally formed on the insert tool.
  • the insert tool has a hub with a shaping pointing in the axial direction. It can be easily and inexpensively achieved a protection of the functional elements and also can be advantageously avoided by the formation of a 'reversed mounting of the insert tool. If the hub formed by a sheet metal part, the formation can be inexpensively formed in a deep-drawing process.
  • the shaping can have various forms that appear appropriate to the person skilled in the art. If the hub is cup-shaped or extends in the middle region of the hub over a larger area, the molding can be formed with a simple tool and also a high stability of the hub can be achieved. Furthermore, in particular in handheld power tools that have a protective hood, a positive connection of the functional element with a Recess of the hub of the insert tool can be prevented in a side-inverted mounting, namely by the insert tool rests on the protective cover due to the formation in a reversed mounting before the functional element comes into engagement in the recess.
  • the solution according to the invention can be applied to various hand tool machines that appear suitable for the person skilled in the art, in particular for angle grinders.
  • Fig. 1 shows an angle grinder 44 from above with a mounted in a housing 46, not shown electric motor.
  • the angle grinding machine 44 can be guided via a first, in the housing 46 on the side facing away from a blade 12, extending in the longitudinal direction handle 48 and a second attached to a gear housing 50 in the region of the cutting disc 12, transversely to the longitudinal direction extending handle 52 feasible.
  • a drive shaft 14 can be driven via a transmission, not shown in detail, at whose end facing the blade 12 a tool holder with a driving device 10 is arranged (Fig. 2).
  • the tool holder and the cutting disc 12 form a system.
  • the entrainment device 10 has a driving flange 54, which forms a bearing surface 56 for the cutting disk 12 (FIGS. 2 and 4).
  • a collar 58 is integrally formed on the side facing the cutting disk 12, via which the cutting disk 12 is radially centered with its centering bore 88 in the mounted state. Radial forces can advantageously be absorbed by the driving flange 54 without loading an unlocking button 60.
  • a metal plate 62 On a side facing away from the cutting disc 12 of the driving flange 54 is a metal plate 62 with three circumferentially 36, 38 evenly distributed, integrally formed, extending in the axial direction 34 clamping hooks 24 for axial fixation of the cutting disc 12 is arranged (FIGS. 2 and 4).
  • the clamping hooks 24 are formed in a bending operation on the metal plate 62.
  • the driving flange 54, a corrugated spring 64 and the sheet metal plate 62 are pre-assembled.
  • the corrugated spring 64 is pushed onto a pointing in the direction away from the blade 12 direction collar 94 of the driving flange 54.
  • the clamping hooks 24 of the metal plate 62 which at its free end a hook-shaped extension with a circumferentially facing inclined surface 78 (FIGS. 2, 3 and 4), guided in the axial direction 34 by recesses 70 of the driving flange 54, respectively by widened regions 90 of the recesses 70 (FIGS. 2 and 4).
  • the wave spring 64 By compressing and rotating the metal plate 62 and the driving flange 54 against each other, the wave spring 64 is biased, and the metal plate 62 and the driving flange 54 are positively connected in the axial direction 34, 66, by the hook-shaped projections in narrow portions 68 of the recesses 70 is rotated ( Figures 2, 3 and 4).
  • the metal plate 62 is then, loaded by the wave spring 64, supported on the support surface 56 of the driving flange 54 via edges 22 of the hook-shaped projections, which point axially in the direction away from the cutting wheel 12 direction.
  • the preassembled module consisting of the metal plate 62, the wave spring 64 and the driving flange 54, mounted on the drive shaft 14.
  • the bolts 18 are guided during assembly by integrally formed on the circumference of the metal plate 62 recesses 74 and through through holes 76 in the driving flange 54 and engage in the assembled state through the through holes 76 therethrough.
  • the metal plate 62 and the driving flange 54 are secured to each other via the bolts 18 against rotation.
  • the driving flange 54 is pressed onto the drive shaft 14 and then secured with a locking ring, not shown.
  • a press connection In addition to a press connection, however, other, dem.fachmann appear reasonable as connections conceivable, such as a threaded connection, etc.
  • the cutting disk 12 has a sheet metal hub 40 formed by a separate component, which has three uniformly distributed holes 82 in the circumferential direction 36, 38 whose diameter is slightly larger than the diameter of the pin 18. Further, the sheet metal hub 40 has three uniformly in the circumferential direction 36, 38 distributed, extending in the circumferential direction 36, 38 recesses 26, each one narrow region 84 and a wide region 86, the outer contour of which corresponds to a projection surface of the clamping hooks 24 in the direction of the cutting disk 12.
  • the diameter of the center hole of the sheet metal hub 40 is selected so that the cutting disc 12 can be clamped with a conventional clamping system with a clamping flange and a spindle nut on a conventional angle grinder. It ensures a so-called backward compatibility.
  • the clamping hooks 24 form by their shape a first means 32 and a first part of a second means 20, 20 'to avoid reversed mounting of the cutting disk 12.
  • the first means 32 and an edge of the clamping hook 24 would come at a rotational movement required for the assembly with an edge 92 of the recess 26 into abutment, the rotational movement of the cutting disk 12 would be blocked and a Fixing the blade 12 in the axial direction 34 would be prevented.
  • the projection surface of the tensioning hook 24 in the direction of the separating disk 12 is asymmetrical to an axis 28 which perpendicularly intersects an axis of rotation of the separating disk 12 and extends through a center of the projection surface, specifically the projection surface of the tensioning hook 24 has a rectangular area on one side in a corner region a flat 20 ( Figure 3).
  • the projection screen with the flattening 20 forms with the corresponding recess 26 with a corresponding flattening 20 'the coding 20, 20' (FIGS. 2, 3 and 4).
  • the sheet metal hub 40 of the cutting wheel 12 is connected via a rivet connection firmly with an abrasive and pressed and is executed by a pointing in the axial direction 34 molding 30 'cup-shaped.
  • the formation 30 ' forms a first part of a coding 30, 30' (FIGS. 5 and 6).
  • a corresponding second part of the coding 30, 30 ' is formed by a surface 30 of a protective hood 42 of the tool holder, on the surface 30 of which the cutting disk 12 comes to rest in a laterally reversed mounting, before the clamping hooks 24 can be inserted into the recesses 26 (FIG 2).
  • the cutting disk 12 is pushed with its center hole 88 on the centering collar 58 and radially centered. Subsequently, the cutting wheel 12 is rotated, until the clamping hooks 24 engage in the designated wide areas 86 of the recesses 26 of the sheet metal hub 40. Pressing the sheet metal hub 40 against the bearing surface 56 of the driving flange 54 causes the bolts 18 are axially displaced in the through holes 76 and the drive plate 72 against the spring force of the coil spring 16 on the drive shaft 14 in the direction away from the blade 12 66.
  • the holes 82 come in the sheet metal hub 40 via the through holes 76 of the driving flange 54 to lie.
  • the bolts 18 are displaced axially in the direction 34 of the cutting disk 12 by the spring force of the helical spring 16, engage in the holes 82 of the sheet metal hub 40 and fix them in both circumferential directions 36, 38 in a form-fitting manner.
  • an audible click sound is heard by an operator, signaling that the device is ready for operation.
  • the fasteners and the slots in the sheet metal hub can be performed rotated by 180 °, so that the mounting direction reverses, and the sheet metal hub is rotated during assembly in the drive direction.
  • the fasteners twisted by 180 ° carried out, in advance an operating obliquely an oblique surface of a lower end edge of the fastener, so that there is a kind of deflector, which effectively prevents hooking of the end edge, for example, upon contact with a workpiece edge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP02750812A 2001-07-26 2002-07-02 System mit einer werkzeugaufnahme Expired - Lifetime EP1414620B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10136459A DE10136459A1 (de) 2001-07-26 2001-07-26 System mit einer Werkzeugaufnahme
DE10136459 2001-07-26
PCT/DE2002/002400 WO2003011527A1 (de) 2001-07-26 2002-07-02 System mit einer werkzeugaufnahme

Publications (2)

Publication Number Publication Date
EP1414620A1 EP1414620A1 (de) 2004-05-06
EP1414620B1 true EP1414620B1 (de) 2006-05-10

Family

ID=7693192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02750812A Expired - Lifetime EP1414620B1 (de) 2001-07-26 2002-07-02 System mit einer werkzeugaufnahme

Country Status (8)

Country Link
US (1) US7077735B2 (ja)
EP (1) EP1414620B1 (ja)
JP (1) JP2004521770A (ja)
KR (1) KR20040038986A (ja)
CN (1) CN1258435C (ja)
CZ (1) CZ304787B6 (ja)
DE (3) DE10136459A1 (ja)
WO (1) WO2003011527A1 (ja)

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DE10360248A1 (de) 2003-12-20 2005-07-28 Robert Bosch Gmbh Einsatzwerkzeug für einen Winkelschleifer
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US8382177B2 (en) * 2009-06-11 2013-02-26 Re2, Inc. Quick-change finger for robotic gripper
EP2464884B1 (en) 2009-08-10 2014-01-15 RE2, Inc. Automated tool change assembly for robotic arm
US8499431B2 (en) * 2009-10-26 2013-08-06 Robert Bosch Gmbh Piezoelectric clamping device
USD619152S1 (en) 2009-12-18 2010-07-06 Techtronic Power Tools Technology Limited Adapter
USD623034S1 (en) 2009-12-18 2010-09-07 Techtronic Power Tools Technology Limited Tool arbor
US9186770B2 (en) 2010-04-29 2015-11-17 Black & Decker Inc. Oscillating tool attachment feature
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
DE102010039637A1 (de) * 2010-08-23 2012-02-23 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Spannhals
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USD652274S1 (en) 2010-12-14 2012-01-17 Techtronic Power Tools Technology Limited Universal interface for accessory blades
USD651877S1 (en) 2010-12-14 2012-01-10 Techtronic Power Tools Technology Limited Universal interface for accessory blades
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USD694598S1 (en) 2012-06-25 2013-12-03 Techtronic Power Tools Technology Limited Universal interface for accessory blades
USD694599S1 (en) 2012-06-25 2013-12-03 Techtronic Power Tools Technology Limited Universal interface for accessory blades
USD694596S1 (en) 2012-06-25 2013-12-03 Techtronic Power Tools Technology Limited Universal interface for accessory blades
US9265397B2 (en) * 2012-07-09 2016-02-23 Carlisle Food Service Products, Inc. Adapter plate for a rotary floor scrubbing machine
USD832666S1 (en) 2012-07-16 2018-11-06 Black & Decker Inc. Oscillating saw blade
US9555554B2 (en) 2013-05-06 2017-01-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system
DE102017213668A1 (de) * 2016-08-22 2018-02-22 Robert Bosch Gmbh Werkzeugmaschine
EP3479957A4 (en) * 2016-12-16 2020-06-03 Miretec Co., Ltd. ROTATION DEVICE
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
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Also Published As

Publication number Publication date
DE50206750D1 (de) 2006-06-14
CZ2003851A3 (cs) 2004-01-14
US7077735B2 (en) 2006-07-18
KR20040038986A (ko) 2004-05-08
DE10136459A1 (de) 2003-02-13
CZ304787B6 (cs) 2014-10-22
WO2003011527A1 (de) 2003-02-13
CN1464818A (zh) 2003-12-31
US20040012160A1 (en) 2004-01-22
CN1258435C (zh) 2006-06-07
EP1414620A1 (de) 2004-05-06
DE10293322D2 (de) 2004-11-11
JP2004521770A (ja) 2004-07-22

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