EP4003645A1 - Machine-outil - Google Patents

Machine-outil

Info

Publication number
EP4003645A1
EP4003645A1 EP20740608.3A EP20740608A EP4003645A1 EP 4003645 A1 EP4003645 A1 EP 4003645A1 EP 20740608 A EP20740608 A EP 20740608A EP 4003645 A1 EP4003645 A1 EP 4003645A1
Authority
EP
European Patent Office
Prior art keywords
spindle
machine tool
axis
rotation
outer diameter
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.)
Pending
Application number
EP20740608.3A
Other languages
German (de)
English (en)
Inventor
Helmut Hummel
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP4003645A1 publication Critical patent/EP4003645A1/fr
Pending legal-status Critical Current

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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • 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
    • 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
    • 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
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle

Definitions

  • the present invention relates to a machine tool, in particular an angle grinder, with a spindle that can be driven about an axis of rotation according to the type described in more detail in the preamble of patent claims 1.
  • a quick release device for an angle grinder is known from WO 19030058 A1. Grinding wheels that are specifically adapted to the angle grinder are securely attached to the spindle by means of a clamping device.
  • a particularly hand-held machine tool in particular an angle grinder, is thus proposed with a spindle that can be driven about an axis of rotation, a device being provided which can be fixed by means of a rotary connection on the spindle.
  • a separate safety device is provided which is operatively connected to the spindle, which is arranged at least in some areas on the output side of the device and at least in the operation of the machine tool has an outer diameter that is at least partially larger than an outer diameter of the spindle with respect to the axis of rotation.
  • a machine tool designed according to the invention it can be ensured in a simple and inexpensive manner that the device which can be brought into operative connection with the spindle cannot become detached from the spindle during operation of the machine tool.
  • This is achieved in particular by providing a separate element on the machine tool side which prevents the device from being released from the spindle in that the separate element has, at least in some areas, a larger outer diameter than an outer diameter of the spindle, at least when the machine tool is in operation. This reliably prevents injury to a user.
  • various types of processing elements such as grinding disks, cutting disks, brushes or the like, can advantageously be used without their own requirements with regard to a discharge safety device, so that these can be implemented simply and inexpensively.
  • the solution according to the invention also has the advantage that it can be used regardless of the type and size of the device used, so that the safety device can secure devices with different lengths in the longitudinal direction of the spindle.
  • the solution according to the invention a loosening of the device or the tool from the spindle in an operation is reliably prevented even in the case of incorrect use by the user when fixing the device.
  • the securing device can also have a non-circular outer edge area, so that the securing device is not designed to be rotationally symmetrical to the axis of rotation of the spindle.
  • the outer diameter of the securing device is understood to be twice the value of a greatest distance between an area of the securing device facing away from the axis of rotation and the axis of rotation of the spindle.
  • the device is designed as a tool or machining element executed with an internal thread, which can be brought into active connection with an external thread of the spindle.
  • the tool or machining element can be designed, for example, as a disk, grinding wheel, cutting disk, brush or the like, the tool itself being connected to the spindle.
  • the device is designed as a fastening nut designed with an internal thread, which can be brought into operative connection with an external thread of the spindle for securing a tool or machining element.
  • the fastening nut is preferably designed to fix a disc, grinding disc, cutting disc or the like without an internal thread, the work tool being attachable, for example, to the spindle.
  • the securing device has a threaded area executed with an external thread, with which the securing device is in operative connection with an internal threading, in particular extending in the longitudinal direction of the spindle and concentric to the Axis of rotation arranged area of the spindle can be brought, wherein a pitch of the thread of the securing device is smaller than a pitch of a thread of the device. Due to the smaller pitch of the thread of the safety device compared to the pitch of the thread of the device, a loosening of the device from the spindle is reliably prevented even if the device is rotated relative to the spindle.
  • the safety device preferably has a plate-shaped area which is arranged on one end side of the spindle. The safety device is preferably arranged concentrically to the axis of rotation of the spindle.
  • the safety device can be designed as a spring ring, which is arranged in a groove of the spindle running particularly perpendicular to the axis of rotation, the spring ring between a preloaded posi tion in which an outer diameter of the Circlip is smaller than or equal to the outer diameter of the spindle, and a relaxed position in which the outer diameter of the circlip is greater than the outer diameter of the spindle can be displaced.
  • the spring ring can in particular have a continuous slot in the circumferential direction, which allows a reduction in the outer diameter of the spring ring.
  • the device can preferably have bevels on both sides of an inner diameter viewed in the longitudinal direction of the spindle.
  • a spring force of the spring ring is selected such that it is greater than a force that acts on the spring ring during operation by a released device.
  • the securing device is designed as a lever which is pivotably linked to the spindle and which can be moved into a deflected position, in particular under the influence of centrifugal force, in which the lever has an outer diameter that is at least partially larger than the outer diameter the spindle has.
  • the lever is designed in such a way that it is displaced into its deflected position only by a centrifugal force acting during operation of the machine tool, the device can easily be attached and released when the machine tool is not actuated.
  • the lever is preferably mounted on the spindle so as to be pivotable about an axis transverse to the axis of rotation of the spindle, the lever being in particular angeord net in a recess of the spindle.
  • the lever can thus be pivoted in a simple manner between the use position and the non-use position, the lever in the non-use position enabling the device to be arranged on the spindle and the lever thus preferably is arranged overall within a given by the outer diameter of the spindle Hüllgeomet rie.
  • a spring device which acts on the lever with a force which prestresses it into its deflected position.
  • the lever has, at least in some areas, a larger outer diameter than the spindle and the device is thus securely held on the spindle.
  • the lever is, for example, manually displaceable against the spring force of the spring device into a non-use position in which the device can be removed from the spindle or arranged on the spindle.
  • the lever has an end region on both sides of a fulcrum, each of the end regions being pivotable into the deflected position in which the respective end region has an at least regionally larger outer diameter than the outer diameter of the spindle.
  • This embodiment has the advantage that both devices with a large extension in the longitudinal direction of the spindle and devices with a small extension in the longitudinal direction of the spindle can be securely held on the spindle.
  • two spring devices can be provided which hold the lever in a balance.
  • a distance between the two end regions of the lever in the longitudinal direction of the spindle is preferably greater than an extension of the device in the longitudinal direction of the spindle.
  • the lever can be U-shaped or curved for example.
  • a thickness of the device in the longitudinal direction of the spindle is preferably smaller than a distance between the end regions of the lever in the longitudinal direction of the spindle.
  • the safety device is designed as an in particular plate-shaped element which is arranged in a recess of the spindle and can be displaced in particular transversely to the axis of rotation via a guide device.
  • the plate-shaped element can be designed such that it is transferred into the deflected position due to the centrifugal force acting during operation of the machine tool and holds the device securely on the spindle.
  • the recess runs, for example, essentially in the longitudinal direction of the spindle or essentially transversely to the longitudinal direction of the spindle, wherein the plate-shaped element is accordingly arranged essentially in the longitudinal direction or in the transverse direction of the spindle.
  • the device can independently of its extent in the longitudinal direction of the Spindle are in contact with the element and are held in the operation of the machine tool without play in the longitudinal direction of the spindle.
  • a spring device can be provided which acts on the element with a force acting outwardly with respect to the axis of rotation of the spindle.
  • the element can be displaced into its non-use position, for example, manually or by means of a tool against the spring force of the spring device.
  • Simple accessibility of the element in particular for the transfer of the element from the position of use to the position of non-use, can be achieved if the element is arranged at an end of the spindle on the output side.
  • the element can have, for example, an engagement element or an engagement opening for a tool, by means of which the element can be transferred from the use position to the non-use position.
  • the recess can run essentially transversely to the longitudinal direction of the spindle.
  • FIG. 1a shows a simplified representation of a hand-held machine tool designed as an angle grinder, a grinding wheel being arranged on a spindle by means of a fastening nut;
  • FIG. 1 b shows a greatly simplified representation of the angle grinder according to FIG. 1 a;
  • FIG. 2 shows a section of an end region of the spindle of the machine tool according to FIG.
  • FIG. 4 shows a detail of a further, alternatively designed end region of the spindle, a lever being pivotably mounted in a recess in the spindle;
  • FIG. 5 shows a detail of a further, alternatively designed end region of the spindle, a lever designed with two end regions being pivotably mounted in a recess of the spindle;
  • FIG. 6 shows a detail of a further, alternatively designed end region of the spindle, an element which can be displaced perpendicularly to the longitudinal direction is arranged in a recess of the spindle running in the longitudinal direction;
  • FIG. 7 shows a sectional view of the spindle according to FIG. 6 along the line VII-VII;
  • FIG. 8 shows a detail of a further, alternatively designed end region of the spindle, wherein an element which can be displaced perpendicular to the longitudinal direction is arranged in a recess extending perpendicular to the longitudinal direction of the spindle and can be seen in a position of use;
  • FIG. 9 shows a section corresponding to FIG. 8, the displaceable element in a
  • FIGS. 8 and 9 shows a plan view of the spindle according to FIGS. 8 and 9, wherein a guide groove for displacing the element can be seen.
  • Fig. 1 shows a greatly simplified view of a special hand-held machine tool 1 designed here as an angle grinder.
  • the machine tool 1 contains a housing 3, a battery 4 connected to the housing 3 as a power supply, a head 5 with a tool holder 6 contains a flange 7, a spindle 8 and a device 9.
  • the device 9, designed here as a clamping element or fastening nut, has an internal thread 10 by means of which the device 9 can be arranged on an external thread 11 of the spindle 8 defining an external diameter 14 of the spindle 8 and the spindle 8 can be displaced in the longitudinal direction L.
  • the spindle 8 is used to arrange a tool 12, for example a grinding or cutting wheel, and to transmit a torque from an electric motor 2 to the tool 12.
  • the tool 12 has a central through hole 13, the tool being slipped onto the spindle 8 by means of the through hole 13 and being able to be fastened by means of the device 9.
  • the spindle 8 is connected to the head 5 of the machine tool 2 by means of a flange 7 and is mounted rotatably about the longitudinal axis L.
  • the flange 7 is positioned below the spindle 8 on the head 5 of the machine tool 2 with respect to the longitudinal direction L of the spindle 8.
  • a safety device each partially or completely arranged on a side of the tool 12 and / or the fastening nut 9 facing away from the head 5 of the machine tool 1 and at least when the machine tool 1 is in the operating state with the spindle 8 rotating Tool 12 and / or the fastening nut 9 of the spindle 8 safely prevented by the fact that the respective securing device during operation of the machine tool 1 on a side of the device 9 facing away from the head 5 assumes a position of use in which an outer diameter of the securing device is at least partially is greater than the outer diameter 14 of the spindle 8.
  • an area of the respective securing device facing away from the longitudinal axis L is at a greater distance from the longitudinal axis L than the spindle 8 in at least one circumferential area of the longitudinal axis L than the spindle 8.
  • an outer diameter the respective securing device has a larger outer diameter than the spindle 8.
  • FIG. 2 shows, in a greatly simplified manner, an end region of the spindle 8, with an internal thread 16 extending concentrically to the spindle 8 in the longitudinal direction L of the spindle 8 starting from an end 15 of the spindle 8 facing away from the head 5 of the machine tool 2.
  • a safety device 17 which has a pin-like area 18 with an external thread 19, by means of which the safety device 17 with the mecanicge thread 16 of the spindle 8 cooperates.
  • a plate-shaped area 20 is connected, which is circular here and has a larger outer diameter 21 than the spindle 8.
  • the thread pairing 16, 19 has a smaller pitch than the external thread 11 of the spindle 8. Should the fastening nut 9 loosen from the spindle 8 during operation of the machine tool 1 and come into contact with the plate-shaped area 20 of the safety device 17, the corresponding choice of the pitches of the threads 16, 19, 1 1, 10 will cause each other deviating axial rotational offset with a resultant inhibition, so that detachment of the securing device 17 from the spindle 8 and thus with the tool 12 from the spindle 8 is reliably prevented.
  • the safety device 17 rests against the tool 12 in the longitudinal direction L or is spaced from it.
  • a groove 25 running perpendicular to the longitudinal direction L is arranged in an area spaced from the end 15 of the spindle 8, in which a safety device 26, here a spring device 26 designed as a spring ring, is arranged.
  • the spring ring 26 has a recess 27 in the circumferential direction U, so that the spring ring 26 under the action of force between a use position in which an outer diameter 28 of the spring ring 26 is greater than the outer diameter 14 of the spindle 8, and a prestressed position in which the outer diameter 28 of the spring ring 26 is smaller than or equal to the outer diameter 14 of the spindle 8, is displaceable.
  • the fastening nut 9 is shown in detail, whereby it can be seen that the fastening nut 9 is designed in the axial end areas in the area of its internal thread 10 each with a bevel 31, 32, so that the fastening nut 9 with the application of a defined force in the longitudinal direction L. can be screwed onto the spindle 8 via the spring ring 26 or removed therefrom.
  • the force required for this is coordinated in particular with the spring force of the spring ring 26 in such a way that it is greater than the forces that occur during operation of the machine tool 1 and the forces acting on the spring ring 26.
  • the tool 12 or the fastening nut 9 in the assembled state rests against the spring ring 26 in the longitudinal direction L or there is a distance between them.
  • the spindle 8 here has a longitudinal direction L starting from the end 15 extending recess 35, in which a lever 36 designed as a safety device pivotable about a perpendicular to the longitudinal direction L running pivot axis 37 is mounted.
  • the lever 36 is mounted in such a way that, when the machine tool 1 is in operation and the spindle 8 is rotated about the longitudinal axis L, the centrifugal force acting in the process displaces it into a position of use in which a region of a first end region 38 of the Lever 36 in some areas has a larger distance 41 from the axis of rotation L than an outside of the spindle 8.
  • An outside diameter of the lever 36 is thus greater than the outside diameter 14 of the spindle 8. This is a loosening with the tool 12 and the fastening nut 9 installed Be the fastening nut 9 and the tool 12 safely prevented.
  • a spring device 40 is provided in front of lying, which acts on the lever 36 with a force pressing in the direction of the position of use Ge.
  • the lever 36 has a second end region 39 which is arranged on a side of the pivot axis 37 facing away from the first end region 38 and which projects in the longitudinal direction L beyond the end 15 of the spindle 8.
  • the lever 36 in particular for the assembly or disassembly of a tool 12, can be shifted in a simple manner from the position of use into a release position in which the lever 36 is arranged as a whole within an envelope geometry of the spindle 8 and thus not over the outer diameter 14 the spindle 8 protrudes.
  • Fig. 5 shows an alternative embodiment of a securing device 44, which is performed here as a bent lever 44 rotatably mounted on the spindle 8 about the pivot axis 37.
  • a securing device 44 which is performed here as a bent lever 44 rotatably mounted on the spindle 8 about the pivot axis 37.
  • the lever 44 again has two end regions 38 and 39, both end regions 38, 39 each being displaceable into a use position in which the respective end region 38, 39 protrudes beyond the envelope geometry of the spindle 8 and one facing away from the axis of rotation L. Area of the respective end area 38, 39 thus has a greater distance 41 from the axis of rotation L than an outer contour of the spindle 8.
  • the end area 39 further away from the head 5 is also arranged in such a way that it prevents the tool 12 and / or the fastening nut 9 reliably prevented from the spindle 8.
  • the end region 39 is particularly effective when an extension of the tool 12 and / or the fastening nut 9 in the longitudinal direction L of the spindle 8 is so large that they push the other end region 38 into the non-use position.
  • An outer diameter of the lever 44 is thus greater than the outer diameter 14 of the spindle 8.
  • a distance 47 between the end regions 38, 39 in the longitudinal direction L of the spindle 8 is greater than an extension 48 of the fastening nut 9 or of the tool 12 in the longitudinal direction L of the spindle 8, the lever 44 in the present case being held in the balance by two spring devices 45, 46.
  • FIG. 6 A further embodiment of a securing device 52 is shown in Fig. 6, the securing device 52 being designed here as a plate-shaped securing element which is arranged in a recess 53 extending in the longitudinal direction L of the spindle 8, which can be seen in more detail in FIG.
  • the securing element 52 in the present case has two elongated holes 54, 55 in which pins 56, 57 arranged on the spindle 8 are guided.
  • the securing element 52 can thus be displaced perpendicular to the longitudinal direction L with respect to the spindle 8, the securing element 52 being pushed outwards as far as possible with respect to the longitudinal axis L during operation of the machine tool 1 due to the centrifugal force acting.
  • a spring device can also be provided which moves the securing element 52 into the use position, d. i.e., in the outwardly pushed position, a force is applied.
  • a distance from a side of the securing element 52 facing away from the longitudinal axis L in a peripheral region of the axis of rotation is greater than a distance from the outer contour of the spindle 8, so that an outer diameter of the securing element 52 is greater than the outer diameter 14 of the spindle 8 is.
  • the securing element 52 is designed such that it can be displaced starting from the position of use into the non-use position, the securing element 52 in the non-use position not protruding beyond an envelope geometry of the spindle 8 and a tool 12 and / or the fastening nut 9 without hindrance from the securing element 52 can be assembled or dismantled.
  • a side delimitation 58 of the securing element 52 facing away from the longitudinal axis L of the spindle 8 of the longitudinal axis L is embodied in the present case at an angle, ie the side delimitation 58 forms an angle 59 with the longitudinal direction L, an end of the securing element 52 facing the end 15 of the spindle 8 being at a greater distance from the longitudinal axis L of the spindle 8 than an end of the securing element 52 facing away from the end 15 of the spindle 8.
  • This embodiment of the securing element 52 has the advantage that the securing element 52 is in contact with the tool 12 or the fastening nut 9 in the assembled state in various tools 12 that can be brought into operative connection with the spindle 8, the tool 12 or the fastening nut 9 as a result the self-locking jams in the mounted position and thus reliably prevents loosening.
  • FIGS. 8 to 10 Another embodiment of a safety device 65 is shown in FIGS. 8 to 10.
  • the safety device 65 is in turn designed as a safety element which is arranged in a recess 66 in the spindle 8.
  • 8 and 9 show sectional views through a region of the spindle 8 in which the securing element 65 is arranged.
  • the securing element 65 is shown in Fig. 9 in the position of use, in which the securing element 65 protrudes beyond the envelope geometry of the spindle 8 in the radial direction and a distance 73 of a region of the securing element 65 facing away from the longitudinal axis L is greater than a distance of the outer contour of the spindle 8 from the longitudinal axis L.
  • the safety element 65 thus has a larger outer diameter than the outer diameter 14 of the spindle 8, at least in some areas.
  • the securing element 65 is pressed into the position shown by means of a spring device 69 and is supported in this position on flanks 67, 68 of the recess 66.
  • the securing element 65 in the present case has a recess 71 designed to interact with a tool, the securing element being displaceable into the non-use position by means of the tool against the spring force of the spring device 69.
  • the spindle 8 has a guide device arranged at its end 15 in the form of a guide curve 70, the securing element 65 by means of a tool which can be brought into engagement with the securing element 65 by the guide curve 70 from the position of use into the Non-use position is displaceable.
  • the guide curve 70 is designed in such a way that the securing element 65 experiences a rotational movement in addition to a translational movement in the direction of a central axis of the spindle 8 during such a displacement.
  • the flanks 67, 68 of the recess 66 are executed in such a way that the securing element 65 assumes a locked position in the non-use position, in which the spring force of the spring device 69 does not shift the securing element 65 into the use position when the spindle 8 is stationary. In this state, the tool 12 and / or the fastening nut 9 can be mounted or removed.
  • the safety devices designed according to the invention are suitable both for the use of a tool 12 fixed on the spindle 8 via a fastening nut 9 and for the use of a tool 12 which can be fixed itself with an internal thread and on the spindle 8.

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)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne une machine-outil (1), en particulier une meuleuse d'angle, pourvue d'une broche (8) pouvant être entraînée autour d'un axe de rotation (L), un dispositif (9) pouvant être fixé sur la broche (8) au moyen d'une liaison rotative. Un dispositif de blocage (26) séparé, en liaison fonctionnelle avec la broche (8), est disposé au moins par endroits côté sortie du dispositif (9) et, au moins pendant le fonctionnement de la machine-outil (1), présente un diamètre extérieur (28) plus grand au moins par endroits par rapport à l'axe de rotation (L) qu'un diamètre extérieur (14) de la broche (8).
EP20740608.3A 2019-07-24 2020-07-14 Machine-outil Pending EP4003645A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19188021.0A EP3769913A1 (fr) 2019-07-24 2019-07-24 Machine-outil
PCT/EP2020/069845 WO2021013628A1 (fr) 2019-07-24 2020-07-14 Machine-outil

Publications (1)

Publication Number Publication Date
EP4003645A1 true EP4003645A1 (fr) 2022-06-01

Family

ID=67438675

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19188021.0A Withdrawn EP3769913A1 (fr) 2019-07-24 2019-07-24 Machine-outil
EP20740608.3A Pending EP4003645A1 (fr) 2019-07-24 2020-07-14 Machine-outil

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19188021.0A Withdrawn EP3769913A1 (fr) 2019-07-24 2019-07-24 Machine-outil

Country Status (4)

Country Link
US (1) US20220274227A1 (fr)
EP (2) EP3769913A1 (fr)
CN (1) CN113939380B (fr)
WO (1) WO2021013628A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5577872A (en) * 1993-03-15 1996-11-26 Power Tool Holders Incorporated Torque enhancing tightening screw
DE19960970B4 (de) * 1999-12-17 2007-07-12 Robert Bosch Gmbh Tragbare Handwerkzeugmaschine
DE10308743B3 (de) * 2003-02-28 2004-11-11 Hilti Ag Schnellspannmutter für scheibenförmige Werkzeuge
DE102007055775A1 (de) * 2007-12-12 2009-06-18 Hilti Aktiengesellschaft Handwerkzeugmaschine mit Spannmutter
DE102010039637A1 (de) * 2010-08-23 2012-02-23 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Spannhals
DE102011005021A1 (de) * 2011-03-03 2012-09-06 Robert Bosch Gmbh Werkzeugspannvorrichtung
DE102012007931A1 (de) * 2012-04-17 2013-10-17 C. & E. Fein Gmbh Handwerkzeug
EP3202533A1 (fr) * 2016-02-02 2017-08-09 HILTI Aktiengesellschaft Dispositif de serrage
DE102016220362A1 (de) * 2016-10-18 2018-04-19 Robert Bosch Gmbh Schnellspannvorrichtung für eine zumindest eine rotierend antreibbare Abtriebswelle aufweisende tragbare Werkzeugmaschine, insbesondere Winkelschleifmaschine
DE102017214118A1 (de) 2017-08-11 2019-02-14 Robert Bosch Gmbh Schnellspannvorrichtung für eine, insbesondere zumindest eine rotierend antreibbare Abtriebswelle aufweisende, tragbare Werkzeugmaschine, insbesondere Winkelschleifmaschine

Also Published As

Publication number Publication date
WO2021013628A1 (fr) 2021-01-28
CN113939380A (zh) 2022-01-14
CN113939380B (zh) 2023-08-18
EP3769913A1 (fr) 2021-01-27
US20220274227A1 (en) 2022-09-01

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