EP1274544B1 - Schleifmaschinenwerkzeugaufnahme - Google Patents

Schleifmaschinenwerkzeugaufnahme Download PDF

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Publication number
EP1274544B1
EP1274544B1 EP01929305.9A EP01929305A EP1274544B1 EP 1274544 B1 EP1274544 B1 EP 1274544B1 EP 01929305 A EP01929305 A EP 01929305A EP 1274544 B1 EP1274544 B1 EP 1274544B1
Authority
EP
European Patent Office
Prior art keywords
tool
grinding
axial direction
driving
latching element
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
EP01929305.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1274544A1 (de
Inventor
Dieter Wendt
Harald Krondorfer
Ralph Dammertz
Markus Heckmann
Joachim Schadow
Thomas Schomisch
Marco Brancato
Christof Hoelzl
Johann Huber
Wilhelm Schulze
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 EP1274544A1 publication Critical patent/EP1274544A1/de
Application granted granted Critical
Publication of EP1274544B1 publication Critical patent/EP1274544B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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
    • 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

Definitions

  • the invention relates to a grinding machine tool holder according to the preamble of claim 1.
  • the angle grinder has a drive shaft which has a thread on the tool side.
  • the grinding machine tool holder has a driver and a clamping nut.
  • 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 periphery recesses extending in the axial direction to a bottom of the Bunds extend. 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 frictional engagement 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.
  • a grinder tool holder for a hand-held angle grinder which has a driving device, via which an insert tool with a drive shaft is operatively connected, wherein the insert tool via at least one movable against a spring force latching element with the driving device is operatively connected, which engages in an operating position of the insert tool and the insert tool fixed in a form-fitting, wherein the insert tool is connected in the circumferential direction via at least the locking element and in the axial direction via at least a second element with the driving device.
  • a grinder insert tool an angle grinder is known, which is connectable to a tool hub via a driving device of a grinding machine tool holder with a drive shaft of a grinding machine, the tool hub via at least one movable against a spring force locking element with the driving device is operatively connected, which engages in an operating position of the tool hub and the Tool hub fixed in a form-fitting manner, wherein the insert tool is connected in the circumferential direction via at least the locking element and in the axial direction via at least one second element with the driving device.
  • the invention relates to a grinding machine tool holder, in particular for a hand-held angle grinder, with a driving device, via which an insert tool with a drive shaft is operatively connected, wherein the insert tool via at least one movable against a spring force latching element with the driving device is operatively connected in a Operating position of the insert tool engages and fixed the insert tool positively, wherein the insert tool is connected in the circumferential direction via at least the locking element and in the axial direction via at least one further locking element with the driving device.
  • the further latching element fixes the insert tool in the axial direction in a form-fitting manner, wherein the further latching element is movably mounted against a spring element.
  • the locking element can positively fix the insert tool directly or indirectly via an additional component, for example via a latching element coupled, rotatably and / or axially displaceably mounted locking lever or plunger etc. It is also conceivable that the locking element, the insert tool in the radial direction and directly / or indirectly positively fixed. It is also possible that by the positive fixation of the insert tool with the locking element in a first direction, for example in the radial direction, the insert tool through a separate component from the locking element is fixed in a form-fitting manner in a second direction, for example in the circumferential direction.
  • the movable latching element can be embodied in various forms that appear appropriate to the person skilled in the art, for example as an opening, projection, pin, bolt, etc., and can be arranged on the insertion tool or on the driving device.
  • the entrainment device can be at least partially designed as a detachable adapter part or can be non-releasably connected to the drive shaft in a force-fitting, positive-locking and / or cohesive manner.
  • the grinding machine tool holder can be used to attach various insertion tools that appear appropriate to a person skilled in the art, such as inserting tools for cutting, grinding, roughing, brushing, etc.
  • a tool holder according to the invention can also serve to fasten a sanding disc of eccentric grinding machines.
  • the latching element is formed in a further embodiment of an elastically deformable component, whereby additional spring elements can be saved and simple, inexpensive constructions can be achieved.
  • the insert tool is connected in the circumferential direction via at least a first element and in the axial direction via at least one second element with the driving device.
  • simple and inexpensive tool hubs can be achieved, which can be advantageously carried out flat. Hooking of the tool hubs during manufacture and storage can be avoided and good handling of the insert tool with its tool hubs can be made possible.
  • the components can be advantageously designed for their function, i. either on the fixation in the circumferential direction or on the fixation in the axial direction.
  • the elements may be formed by one component or, advantageously, by separate components.
  • the tool hubs can easily be carried out advantageously with a closed center hole and it can be a low-vibration running of the insert tool allows.
  • the grinding machine tool holder according to the invention tools can be attached via conventional fastening devices on conventional grinding machines, in particular on fastening devices, in which the insert tool with a clamping nut and a clamping flange on the drive shaft against a support surface in the axial direction is positively and circumferentially frictionally fixed.
  • the spring force can be designed to act in different directions, such as in the circumferential direction or particularly advantageous in the axial direction, whereby a structurally simple solution can be achieved. Furthermore, the spring force be used to fix the insert tool in the circumferential direction and also in the axial direction.
  • a drive torque via a positive connection between the insert tool and the driving device is transferable. It can be safely transmitted a large drive torque and also it is avoidable that a drive torque affects a positive connection.
  • the insertion tool via at least one of the insert tool and / or arranged on the driving device, extending in the axial direction driving element with the driving device connectable through at least a portion of a slot of the corresponding mating component feasible, slidably along the slot and in an end position can be fixed by the locking element.
  • the driving element extending in the axial direction, a securing in the circumferential direction and in the axial direction can be achieved, wherein advantageously the insert tool is fixed positively in the axial direction via a transfer surface of the carrier element. It can be achieved high security and additional components, weight, installation costs and costs can be saved.
  • At least one spring element generating latching element is integral with a tool hub of the insert tool.
  • the tool hub is usually made of a relatively thin material, which can be easily designed elastically deformable.
  • at least one spring element with a component of the driving device is made in one piece or formed by an additional component, whereby the tool hub can be performed independently of a spring function.
  • At least one recess is advantageously introduced into a component forming a support surface for the insertion tool, into which part of the tool hub is elastically pressed in an operating position of the insertion tool.
  • the slot is introduced into the tool hub of the insert tool and in the region of the slot at least one latching element is formed by a part of the tool hub, and that particularly advantageously has the slot a wide range and an end position of the driving element at least one narrow, the locking element forming area.
  • At least one locking element is movably mounted against a spring element.
  • a large deflection of the locking element can be made possible during assembly of the insert tool, whereby on the one hand a large overlap between two corresponding locking elements and a particularly secure form-locking can be realized and on the other a good audible Einrastgehoffsch can be achieved, the one operator a desired performed locking action advantageously signaled.
  • the locking element may be designed to be movable in different directions against a spring element, such as in the circumferential direction or particularly advantageous in the axial direction, whereby a structurally simple solution can be achieved.
  • the latching element can be movably mounted even in a component in a bearing, for example in a flange of the driving device or in a tool hub of the insert tool.
  • the latching element can also be positively connected to a movably mounted in a bearing member non-positively, positively and / or cohesively firmly or integrally formed with this, for example, with a mounted on the drive shaft component or with a tool hub of the insert tool.
  • the latching element can be released from its detent position by means of an unlocking button and can be moved in particular against the spring element, an independent release of the latching connection, for example by a braking torque, can be safely avoided and safety can be increased.
  • An operation of the insert tool in two circumferential directions can in principle be made possible and the comfort during assembly and disassembly of the insert tool can be increased.
  • At least one latching element extending in the axial direction in an operating position of the insert tool in the axial direction in a locking element corresponding recess of a tool hub of the insert tool can be latched and the insert tool in the circumferential direction positively fixed.
  • the latching element extending in the axial direction may be formed by a separate bolt or by a molded pin, which is produced, for example, by a deep drawing process, etc.
  • At least one locking element on a disc-shaped component and / or at least two elements for fixing the insert tool in the axial direction integrally formed on a disc-shaped component additional components, assembly costs and costs can be saved. Furthermore, press connections between individual components and consequent weaknesses can be avoided.
  • Fig. 1 shows an angle grinder 10 from above with a mounted in a housing 96, not shown electric motor.
  • the angle grinder 10 is over a first, in the housing 96 on the side facing away from a non-inventive cutting wheel 186 side, extending in the longitudinal direction of the handle 98 and a second attached to a gear housing 100 in the region of the cutting disc 186, extending transversely to the longitudinal direction handle 102nd feasible.
  • a drive shaft 54 can be driven via a gear, not shown in more detail, at whose end facing the cutting disc 186 a non-inventive driving device 182 is arranged ( FIGS. 2 and 3 ).
  • the driving device 182 has a driving flange 256.
  • the driving flange 256 is a thread 258 on the Driven drive shaft 54 and runs with a facing away from the blade 186 in the direction 44 facing end face 260 on a collar 262 on the drive shaft 54 at. It would also be possible to permanently connect a driving flange to a drive shaft or to make it integral with a drive shaft.
  • three driving pins 202, 204, 206 are pressed, which extend in the axial direction 38 via an axial bearing surface 264 of the driving flange 256 for the cutting disc 186 and which are evenly distributed in the circumferential direction.
  • On the driving pins 202, 204, 206 heads are formed at their ends facing the blade 186 ends.
  • the head has a larger diameter than the remaining part of the driving pin 202, 204, 206 and forms in the direction driving flange 256 a contact surface 278.
  • the cutting disc 186 has a sheet metal hub 228 ( Fig. 4 ).
  • the sheet metal hub 228 has a centering bore 268, via which the cutting disk 186 can be centered on the centering collar 266 of the driving flange 256.
  • the sheet metal hub 228 is connected to an abrasive 114 via a not shown rivet and pressed.
  • the sheet metal hub 228 has three elongated holes 214, 216, 218 distributed uniformly in the circumferential direction 34, 36, each having a wide area 244, 246, 248 produced by a bore and a narrow area 270, 272, 274 extending in the circumferential direction 36 ,
  • a portion of the sheet metal hub 228 is formed as a spring tab, which forms a latching element 190, 192, 194.
  • spring-loaded driving bolts could also be attached to the driving flange.
  • the cutting disc 186 is placed with its sheet metal hub 228 on the driving flange 256, the heads of the driving pins 202, 204, 206 through the wide portions 244, 246, 248 of the slots 214, 216, 218 inserted therethrough.
  • the sheet metal hub 228 is aligned with its center hole 268 via the centering collar 266.
  • the spring tabs or the locking elements 190, 192, 194 push under the heads of the driving bolts 202, 204, 206.
  • the direction of rotation 36 for attachment of the cutting disc 186 is the drive direction 34 of Drive shaft 54 opposite. This ensures that the cutting disc 186 does not accidentally come off when working.
  • the heads of the driving pins 202, 204, 206 slide during rotation over lugs 276 of the spring tabs or the locking elements 190, 192, 194 and deflect them in the axial direction 44 to the driving flange 256 from.
  • the spring tabs jump back in the axial direction 38 partially and engage behind the heads form-fitting manner.
  • a latching sound arising thereby can serve as a feedback to a user that the sheet metal hub 228 is fixed as desired.
  • By a remaining tension or spring force of the spring tabs is the blade 186 in the axial direction 44 backlash pressed against the support surface 264.
  • the drive torque of the electric motor is transmitted from the driving flange 256 in a form-fitting manner via the driving bolts 202, 204, 206 and via the spring straps or via the locking elements 190, 192, 194 to the sheet metal hub 228.
  • the drive torque opposite braking torque is positively transmitted from the heads of the driving pins 202, 204, 206 via the lugs 276 of the locking elements 190, 192, 194 on the sheet metal hub 228 and frictionally engaged by the support surface 264 on a corresponding bearing surface of the sheet metal hub 228.
  • the size of the friction force depends on the surface condition of the two bearing surfaces 264 and a clamping force of the spring tabs and can be adjusted accordingly via these parameters. Drainage of the cutting disc 186 is safely avoided. In order to transmit particularly large braking moments, for example, between the bearing surfaces a Velcro connection or other positive connection can be made.
  • the entrainment device 184 has a driving flange 234.
  • three driving pin 208, 210, 212 are pressed, which extend in the axial direction 38 via an axial bearing surface 232 of the driving flange 234 for the cutting disc 188 and in the circumferential direction 34, 36 are evenly distributed ,
  • heads are formed at their ends facing the blade 188 ends.
  • the head has a larger diameter than the remaining part of the driving pin 208, 210, 212 and forms in the axial direction 44 to the driving flange 234 a tapered, tapered transfer surface 226.
  • the driving pins 208, 210, 212 are in the bearing surface 232 recesses 236th brought in.
  • the cutting disc 188 has a sheet metal hub 230 (FIG. Fig. 7 ).
  • the sheet metal hub 230 has a centering bore 268, via which the cutting disk 188 can be centered on a centering collar 266 of the driving flange 234.
  • the sheet metal hub 230 is connected to an abrasive 114 via a non-illustrated rivet and pressed.
  • the sheet metal hub 230 includes three in the circumferential direction 34, 36 evenly spaced slots 220, 222, 224, each having a wide, through a hole produced area 238, 240, 242 and before an end position 250, 252, 254 of the driving pins 208, 210, 212 have a narrow, each a detent element 196, 198, 200 forming area.
  • the heads of the driving pins 208, 210, 212 are inserted through the wide areas 238, 240, 242 of the elongated holes 220, 222, 224.
  • the sheet metal hub 230 is aligned with its center hole 268 via the centering collar 266.
  • the driving pins 208, 210, 212 slide into the arcuate slots 220, 222, 224.
  • the direction of rotation 36 for attachment of the cutting disk 188 is opposite to the drive direction 34 of the drive shaft 54. This ensures that the cutting disc 188 does not accidentally come off while working.
  • the heads of the driving bolts 208, 210, 212 slide with their conical transfer surfaces 226 during rotation of the sheet metal hub 230 over the narrowed regions or via the latching elements 196, 198, 200 of the elongated holes 220, 222, 224 and in each case press a part of the sheet metal hub 230 in the region of the elongated holes 220, 222, 224 axially in the direction 44 of the driving flange 234 in the designated recesses 236 of the support surface 232 of the driving flange 234.
  • the cutting disc 188 has an operating position or have the driving pin 208, 210, 212 their end position 250, 252nd , 254 achieved with a comparison with the central region of the slots 220, 222, 224 slightly larger width, snap the locking elements 196, 198, 200 behind the heads of the driving pins 208, 210, 212 a positive fit.
  • the sheet metal hub 230 is elastically deflected by the conical transfer surfaces 226 of the driving pins 208, 210, 212 by a defined amount. A remaining elastic clamping force of the sheet metal hub 230 presses them against the bearing surface 232.
  • the sheet metal hub 230 is secured in a form-fitting manner in the axial direction 38, 44 without play.
  • the drive torque of the electric motor is transmitted by the driving flange 234 in a form-fitting manner via the driving bolts 208, 210, 212 at the end of the elongated holes 220, 222, 224 onto the sheet metal hub 230.
  • the drive torque opposite braking torque is positively transmitted from the heads of the driving pins 208, 210, 212 via the locking elements 196, 198, 200 on the sheet metal hub 230 and frictionally engaged by the support surface 232 on a corresponding bearing surface of the sheet metal hub 230.
  • the size of the friction force depends on the surface condition of the two bearing surfaces 232 and a clamping force of the locking elements 196, 198, 200 and can be adjusted accordingly via these parameters. Drainage of the cutting disc 188 is safely avoided.
  • the cutting disc 188 is rotated relative to the driving flange 234 in the drive direction 34, so that the heads of the driving pins 208, 210, 212 slide over the locking elements 196, 198, 200. If the driving bolts 208, 210, 212 lie in the wide regions 238, 240, 242 of the elongated holes 220, 222, 224, the cutting disk 188 can be pulled off the driving flange 234 in the axial direction 38.
  • Fig. 8 shows a section along the line VIII-VIII in Fig. 1 through one too Fig. 2 Alternative, non-inventive driving device 12.
  • the driving device 12 has on a cutting disc 18 according to the invention facing side on a drive shaft 54 firmly pressed driving flange 82 and on a side facing away from the cutting disc 18 on the drive shaft 54 axially against a centrally disposed helical spring 20 slidably mounted Drive plate 56.
  • driving flange 82 In driving flange 82, three pins 40 are pressed, which extend in the axial direction 38 to the cutting disk 18 via the driving flange 82 and are distributed uniformly in the circumferential direction 34, 36.
  • the pins 40 have at their end facing the cutting disc 18 each having a head which has a larger diameter relative to a remaining part of the pin 40 and on a driving flange 82 side facing a conical, in the axial direction 44 tapered contact surface 76 has.
  • the driving flange 82 forms an axial bearing surface 80 for the cutting disk 18, which defines an axial position of the cutting disk 18 and in which recesses 84 are made in the area of the pins 40.
  • three axial through holes 104 are inserted into the driving flange 82, which are uniformly distributed in the circumferential direction 34, 36, namely, in each case a through hole 104 in the circumferential direction 34, 36 between two pins 40 is arranged.
  • drive plate 56 In the axially slidably mounted on the drive shaft 54 drive plate 56 three bolts 24 are pressed, which in the axial direction 38 to the cutting wheel 18 via the drive plate 56 extend and circumferentially 34, 36 are evenly distributed.
  • the drive plate 56 is pressed by the coil spring 20 in the direction 38 to the cutting wheel 18 against the driving flange 82.
  • the bolts 24 protrude through the through holes 104 and extend in the axial direction 38 via the driving flange 82.
  • the unlocking button 28 has three evenly distributed in the circumferential direction 34, 36, in the axial direction 44 to the axially movable drive plate 56 extending segments 106, which by corresponding Recesses 108 of the driving flange 82 engage and are connected via a snap ring 110 with the drive plate 56 in the axial direction 38 and secure the release button 28 against falling out.
  • the unlocking button 28 is slidably guided in an annular recess 112 in the driving flange 82 in the axial direction 38, 44.
  • the cutting disc 18 has a sheet metal hub 52 which is fixedly connected to an abrasive agent 114 via a non-illustrated rivet and pressed ( Fig. 9 ).
  • the tool hub could also be made of another, the skilled person appear appropriate material, such as plastic, etc.
  • the sheet hub 52 has in the circumferential direction 34, 36 successively three holes 46, 48, 50, whose diameter is slightly larger than the diameter of Bolt 24.
  • the sheet metal hub 52 has three circumferentially 34, 36 arranged one behind the other, in the circumferential direction 34, 36 extending slots 64, 66, 68, each having a narrow portion 70, 72, 74 and a wide, made by a bore portion 58, 60, 62, whose diameter is slightly larger than the diameter of the heads of the pins 40th
  • the sheet metal hub 52 has a centering bore 116 whose diameter is advantageously chosen so that the cutting disk 18 can be clamped on a conventional angle grinder with a conventional clamping system with a clamping flange and a spindle nut. It ensures a so-called backward compatibility.
  • the cutting disc 18 When mounting the cutting disc 18, the cutting disc 18 is pushed with its center hole 116 on the release button 28 and radially centered. Subsequently, the cutting disc 18 is rotated, until the pins 40 in the designated wide areas 58, 60, 62 of the slots 64, 66, 68 of the sheet metal hub 52 engage. Pressing the sheet metal hub 52 against the bearing surface 80 of the driving flange 82 causes the bolts 24 in the through holes 104 and the driving disc 56 to be displaced axially against the spring force of the helical spring 20 on the drive shaft 54 in the direction away from the cutting disk 18.
  • the sheet metal hub 52 is characterized in the Support surface 80 pressed and fixed in the axial direction 38, 44.
  • the bores 46, 48, 50 come in the sheet metal hub 52 via the through holes 104 of the driving flange 82 to lie.
  • the bolts 24 are axially displaced by the spring force of the coil spring 20 in the direction 38 of the cutting disc 18, engage in the bores 46, 48, 50 of the sheet metal hub 52 and fix them in both circumferential directions 34, 36 form fit.
  • an audible click sound is heard by an operator, signaling that the device is ready for operation.
  • a drive torque of the electric motor of the angle grinding machine 10 can be transmitted from the drive shaft 54 to the driving flange 82 in a force-locking manner and from the driving flange 82 in a form-fitting manner via the bolts 24 to the cutting disk 18.
  • the drive torque is transmitted exclusively via the pin 24, since the slots 64, 66, 68 are designed so that the pins 40 do not come at latched pin 24 at the narrow end 70, 72, 74 of the slots to rest.
  • a braking torque which is opposite to the drive torque during and after the switching-off of the electric motor can be transmitted in a form-fitting manner from the driving flange 82 via the bolts 24 to the cutting disk 18. An unwanted release of the blade 18 is safely avoided.
  • circumferentially 34, 36 evenly distributed three bolts 24 an advantageous uniform forces and mass distribution is achieved.
  • the release button 28 is pressed.
  • the driver disc 56 is thereby displaced with the bolt 24 via the unlocking button 28 against the coil spring 20 in the axial direction 44 facing away from the blade 18, whereby the bolt 24 in the axial direction 44 from its detent position or from the holes 46, 48, 50 of the sheet metal hub 52 move.
  • the cutting disc 18 is rotated in the drive direction 34, until the pins 40 in the wide areas 58, 60, 62 of the slots 64, 66, 68 come to rest and the blade 18 can be removed in the axial direction 38 of the driving flange 82.
  • the drive plate 56, the pin 24 and the release button 28 are moved by the coil spring 20 back to their original positions.
  • Fig. 10 is the embodiment in Fig. 8 an alternative embodiment shown with a driving device 14 according to the invention. With regard to the same features and functions can be to the description of the embodiment in 8 and 9 to get expelled.
  • the entrainment device 14 has a driving flange 54 pressed onto the driving flange 90.
  • a collar 92 is formed over which the cutting disc 18 is radially centered in mounted with its center hole 116 state. Radial forces can advantageously be absorbed by the driving flange 90 without loading the unlocking button 28.
  • the driving flange 90 three in the circumferential direction 34, 36 successively uniformly distributed, extending in the axial direction 38 on the support surface 88 pins 42 for axial fixing of the cutting disc 18 in the axial direction 38 against each plate spring 86 slidably mounted.
  • the pins 42 have at their end facing the blade 18 each having a head which has a larger diameter than a remaining part of the pin 42 and on a driving flange 90 side facing a conical, tapered in the axial direction 44 transfer surface 78 and a parallel to Support surface 88 extending contact surface 78a has.
  • the plate springs 86 press the separating disk 18 against the support surface 88 via the abutment surfaces 78a of the pins 42.
  • the pins can also be loaded by a common spring element, for example not extending closer over the entire circumference shown plate spring. This in Fig. 10 illustrated embodiment with the axially displaceably mounted pins 42 is particularly suitable for thick and / or little elastically deformable tool hubs.
  • the entrainment device 16 has a driving flange 118 (not shown in greater detail) attached via a thread 120 (FIG. Fig. 11 . FIGS. 16, 17 and 18 ).
  • the driving flange could also be connected via a non-detachable connection to the drive shaft or be made in one piece with this.
  • the driving flange 118 has three circumferentially 34, 36 arranged one behind the other, extending in the axial direction 38 to a non-inventive cutting disk 32 extending segments 122, 124, 126 and intervening spaces 128, 130, 132 on ( Fig. 16 ). Each of these segments 122, 124, 126 has on its circumference a groove 134, 136, 138, which are opposite to the drive direction 34 in each case via a rotation stop 140, 142, 144 closed and open in the drive direction 34.
  • the driving flange 118 also has a bearing surface 180, which defines an axial position of the cutting disk 32. Further, the segments 122, 124, 126 form a centering collar for the cutting disk 32, over which the cutting disk 32 can be centered.
  • a locking element 26 is connected in the assembled state via three locking pins 146, 148, 150 distributed over the circumference, which engage through corresponding recesses 158, 160, 162 of the driving flange 118 and engage radially behind the driving flange 118 (FIG. Fig. 11 . 14 and 15 ).
  • a helical compression spring 22 is arranged, against which the latching element 26 is displaceable relative to the driving flange 118 in the axial direction 44 facing away from the cutting disk 32.
  • the latching element 26 is thereby guided via radially outwardly facing bearing surfaces 164, 166, 168 between the locking segments 152, 154, 156 in radially inwardly facing surfaces of the segments 122, 124, 126 of the driving flange 118.
  • the bearing surfaces 164, 166, 168 are formed by radially outwardly extending projections 170 (FIG. Fig. 14 ).
  • the locking segments 152, 154, 156 are in the assembled state in the intermediate spaces 128, 130, 132 of the driving flange 118 and project radially over a groove bottom of the grooves 134, 136, 138.
  • the blocking segments 152nd , 154, 156 of the locking element 26 In a starting position before mounting the cutting disk 32 are the blocking segments 152nd , 154, 156 of the locking element 26 in front of the grooves 134, 136, 138, and that loaded by the prestressed helical compression spring 22nd
  • the cutting disc 32 has an annular sheet metal hub 94, which is pressed at its outer diameter with an abrasive 114 and at its inner diameter radially inwardly facing tongues or spring elements 172, 174, 176 ( Fig. 11 . 12 and 13 ).
  • the spring elements 172, 174, 176 are used in conjunction with the driving flange 118 and the release button 30 for transmitting the drive torque, for axially positioning the cutting disk 32 and for securing against running off of the cutting disk 32 when switching off the electric motor or when braking the drive shaft.
  • the spring elements could be used in addition to the segments 122, 124, 126 for centering the cutting disk 32 to the drive shaft.
  • the spring elements 172, 174, 176 move the unlocking button 30 with its locking segments 152, 154, 156 against the spring force of the helical compression spring 22 in the direction away from the cutting disc 32 direction 44.
  • the locking segments 152, 154, 156 are in recesses 178 of the driving flange 118th pressed ( Fig. 18 ), so that the spring elements 172, 174, 176 come to rest in front of the grooves 134, 136, 138.
  • the cutting disk 32 is radially centered over the centering collar formed by the segments 122, 124, 126.
  • the spring elements 172, 174, 176 engage in the grooves 134, 136, 138 of the driving flange 118.
  • the result is a tongue and groove connection.
  • the spring elements 172, 174, 176 have in the circumferential direction 36, the length of the grooves 134, 136, 138.
  • the locking element 26 engages with its locking segments 152, 154, 156, wherein the helical compression spring 22 pushes the locking element 26 with its locking segments 152, 154, 156 in its initial position, so that the locking segments 152, 154, 156 again come to rest in front of the grooves 134, 136, 138.
  • the locking element 26 is fixed with its locking segments 152, 154, 156, the cutting disk 32 against the drive direction 34 positively.
  • the latching creates an audible click sound for an operator, which signals to the operator a desired snap action and a readiness for operation.
  • the transmission of the drive torque takes place in a form-fitting manner via the rotational stops 140, 142, 144 of the driving flange 118 on the spring elements 172, 174, 176 of the sheet metal hub 94 or the cutting disk 32.
  • the cutting disk 32 is above that of the segments 122, 124, 126 of the driving flange Centering 118 centered and held by the support surface 180 and the grooves 134, 136, 138 in its axial position. Further, an occurring during and after switching off the electric motor, the drive torque opposing braking torque is positively transmitted from the locking segments 152, 154, 156 and the driving flange 118 on the spring elements 172, 174, 176 of the cutting disk 32.
  • a clearance compensation is achieved in the axial direction by an unspecified, by a formed of a sheet metal strip spring element in the grooves 134, 136, 138. Further a clearance compensation could be achieved via other spring element that appears to be suitable for the person skilled in the art, for example via spring-loaded balls, which are arranged at suitable locations of the driving flange and fix the tool hub of the cutting disc without clearance, and / or via a small excess of the spring elements of the tool hub a slightly wedge-shaped shape of the grooves and the spring elements of the tool hub, etc.
  • the unlocking key 30 is pressed in the axial direction 44 facing away from the cutting disk 32.
  • the blocking segments 152, 154, 156 of the unlocking button 30 and of the latching element 26 are displaced into the recesses 178 of the driving flange 118.
  • the cutting disk 32 can be rotated in the drive direction 34 with its spring elements 172, 174, 176 from the grooves 134, 136, 138 of the driving flange 118 and withdrawn in the axial direction 38.
  • the unlocking button 30 is pushed back by the helical compression spring 22 in its initial position.
  • Fig. 19 is the embodiment in Fig. 10 an alternative embodiment with a non-inventive driving device 300 shown.
  • the entrainment device 300 has a driving flange 90, which forms a bearing surface 88 for a non-inventive cutting disc not shown.
  • a collar 92 is integrally formed on the side facing the cutting disk, via which the cutting disc is radially centered with its center hole in the mounted state. Radial forces can advantageously from the driving flange 90th be recorded without burdening a release button 28.
  • a metal plate 308 On a side facing away from the cutting disc of the driving flange 90 is a metal plate 308 with three circumferentially evenly distributed, integrally formed, extending in the axial direction 38 fasteners 306 arranged for axially fixing the cutting disc.
  • the fastening elements 306 are formed in a bending process on the metal plate 308.
  • a corrugated spring 312 and the metal plate 308 are pre-assembled.
  • the corrugated spring 312 is pushed onto a collar 322 of the driving flange 90 pointing in the direction away from the cutting wheel.
  • the fastening elements 306 of the sheet-metal plate 308, which at its free end have a hook-shaped extension with an obliquely facing surface 310 ( Fig. 19 and 21 ), guided in the axial direction 38 through recesses 314 of the driving flange 90, in each case by widened regions 316 of the recesses 314 (FIG. Fig. 19 and 21 ).
  • the corrugated spring 312 By compressing and rotating the metal plate 308 and the driving flange 90 against each other, the corrugated spring 312 is biased, and the metal plate 308 and the driving flange 90 are positively connected in the axial direction 38, 44, in that the hook-shaped projections in narrow portions 318 of the recesses 314 is rotated become ( Fig. 19 . 21 and 22 ).
  • the metal plate 308 is then, loaded by the corrugated spring 312, supported on the bearing surface 88 of the driving flange 90 via edges 310a of the hook-shaped extensions, which point axially in the direction away from the cutting wheel direction.
  • the wave spring 312 and the driving flange 90 are pre-assembled, a compression spring 20 and a driving plate 304 with three evenly distributed over the circumference, extending in the axial direction 38, integrally formed pin 302 on a drive shaft 54 plugged.
  • the bolts 302 are formed in a deep-drawing process to a plate 304 forming the plate plate ( Fig. 20 ).
  • the preassembled module consisting of the metal plate 308, the wave spring 312 and the driving flange 90, is mounted on the drive shaft 54.
  • the bolts 302 are guided during assembly by integrally formed on the periphery of the metal plate 308 recesses 320 and through holes 104 in the driving flange 90 and engage in the assembled state through the through holes 104 therethrough.
  • the metal plate 308 and the driving flange 90 are secured against rotation relative to one another via the bolts 302.
  • the driving flange 90 is pressed onto the drive shaft 54 and then secured with a locking ring, not shown.
  • a press connection In addition to a press connection, however, other, the expert appear useful as connections conceivable, such as a threaded connection, etc.
  • the metal plate 308 is moved with the fastening elements 306 via the inclined surfaces 310 axially against the pressure of the wave spring 312 in the direction 38 until the edges 310a of the hook-shaped projections in arcuate, narrow areas 70, 72, 74 laterally adjacent to the slots 64, 66, 68 of the sheet metal hub 53 come to rest.
  • the corrugated spring 312 presses the cutting disk 18 against the bearing surface 88 via the edges 310a of the hook-shaped extensions.
EP01929305.9A 2000-04-07 2001-03-31 Schleifmaschinenwerkzeugaufnahme Expired - Lifetime EP1274544B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10017457A DE10017457A1 (de) 2000-04-07 2000-04-07 Schleifmaschinenwerkzeugaufnahme
DE10017457 2000-04-07
PCT/DE2001/001275 WO2001076823A1 (de) 2000-04-07 2001-03-31 Schleifmaschinenwerkzeugaufnahme

Publications (2)

Publication Number Publication Date
EP1274544A1 EP1274544A1 (de) 2003-01-15
EP1274544B1 true EP1274544B1 (de) 2017-02-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01929305.9A Expired - Lifetime EP1274544B1 (de) 2000-04-07 2001-03-31 Schleifmaschinenwerkzeugaufnahme

Country Status (6)

Country Link
US (1) US6869346B2 (ja)
EP (1) EP1274544B1 (ja)
JP (1) JP5183005B2 (ja)
CN (1) CN1179823C (ja)
DE (1) DE10017457A1 (ja)
WO (1) WO2001076823A1 (ja)

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Also Published As

Publication number Publication date
EP1274544A1 (de) 2003-01-15
CN1179823C (zh) 2004-12-15
CN1366483A (zh) 2002-08-28
WO2001076823A1 (de) 2001-10-18
US20030129933A1 (en) 2003-07-10
US6869346B2 (en) 2005-03-22
JP2003530229A (ja) 2003-10-14
JP5183005B2 (ja) 2013-04-17
DE10017457A1 (de) 2001-10-11

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