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EP3700710A1 - Dispositif de serrage et machine-outil manuelle - Google Patents

Dispositif de serrage et machine-outil manuelle

Info

Publication number
EP3700710A1
EP3700710A1 EP18783530.1A EP18783530A EP3700710A1 EP 3700710 A1 EP3700710 A1 EP 3700710A1 EP 18783530 A EP18783530 A EP 18783530A EP 3700710 A1 EP3700710 A1 EP 3700710A1
Authority
EP
European Patent Office
Prior art keywords
clamping device
coupling module
screw
drive spindle
clamping
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.)
Granted
Application number
EP18783530.1A
Other languages
German (de)
English (en)
Other versions
EP3700710B1 (fr
Inventor
Thomas Blatz
Karin Groth
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
Priority to EP23173701.6A priority Critical patent/EP4227040A1/fr
Publication of EP3700710A1 publication Critical patent/EP3700710A1/fr
Application granted granted Critical
Publication of EP3700710B1 publication Critical patent/EP3700710B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • 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
    • B24D7/06—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 with inserted abrasive blocks, e.g. segmental
    • 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 clamping device for the axial clamping of a tool disk to a drive spindle of a hand tool machine associated flange.
  • the clamping device has a screw which, for clamping the tool disk, is to be screwed into an internal thread of the drive spindle.
  • tensioning devices are basically known from the prior art. Also known from the prior art are clamping devices with a clamping nut, in particular designed as a two-hole nut, which are to be fastened with a corresponding tool on the drive spindle. However, the present invention relates to another class of clamping devices, namely those having a screw which is to be screwed into an end-side internal thread of the drive spindle.
  • the object is achieved in that the screw is mounted in a coupling module of the clamping device, wherein the coupling module has an inner contour which is positively coupled in the circumferential direction against rotation with the drive spindle or pairable.
  • the tensioning device according to the invention has the advantage that it can not tighten or loosen during operation of the power tool, because the coupling module is part of the clamping device mating positively against rotation with the drive spindle paired. This as a counterpart to a preferably positively against rotation paired with the drive spindle flange.
  • the inner contour of the coupling module is designed as a hexagonal profile.
  • a corresponding outer contour of the drive spindle is formed as an external hexagon.
  • Alternative form-fit torsion-proof pairings for example in the sense of a positive shaft-hub connections, can be used.
  • the internal thread of the drive spindle is an end-side internal thread.
  • the internal thread can be in the axial direction with respect to a top surface of the drive spindle be reset.
  • the screw is in the axial direction on the coupling module, in particular with respect to the cylindrical portion of the coupling module addition.
  • the coupling module is preferably cylindrical.
  • the coupling module has a cylindrical portion which can protrude through a central opening of the tool disk.
  • the cylindrical section of the coupling module can protrude into a central opening of the flange.
  • the clamping device has a hand knob, which is formed in the circumferential direction positively against rotation with the screw.
  • a hand knob which is formed in the circumferential direction positively against rotation with the screw.
  • the clamping device on a clamping member which can be acted upon by means of the coupling module with an axial clamping force, so as to clamp the tool disk against the flange.
  • the tendon is formed as a spring plate.
  • the spring plate may be disc-shaped.
  • the screw is mounted on a roller bearing in the coupling module. Characterized in that a Kopfreibung of the clamping element can be reduced by means of the rolling bearing, an increased clamping force of the clamping device is realized.
  • the rolling bearing is designed as angular contact ball bearings.
  • the angular contact ball bearing preferably has a contact angle between 35 ° and 45 °.
  • the contact angle can be 40 °. Due to the diagonal pressure angle of the rolling elements, in particular in an angular contact ball bearing, the clamping device wedged radially towards the end of the clamping operation. This provides an increased safeguard against unintentional release.
  • the tensioning device has a tendon in the form of a spring plate, which is preferred, the tensioning device is given an increased insensitivity to settlement, since the spring plate is in frictional connection with the tool disc, which compensates for thermal expansion.
  • the tensioning device has an elastomeric ring, which is preferably arranged between a head of the screw and a collar of the coupling module.
  • the clamping device may comprise a retaining ring, by means of which the coupling module is held on the screw.
  • the present invention may be provided instead of an elastomeric ring and a plate spring.
  • the diaphragm spring can serve to To seal a grease space between the screw head and the collar of the coupling mode.
  • the plate spring can also axially bias the hand knob.
  • the clamping device has a stop, via which a deflection of the clamping member is indirectly or directly limited.
  • the stopper is formed as an annular collar and arranged between the spring plate and the male tool disc. If the tool disk comes into contact with the stop in the course of the clamping operation, a deflection of the spring element in the axial direction is limited.
  • a hand tool preferably in the form of a grinder or cutting grinder, with a drive spindle having a preferably end-side internal thread, and with a clamping device of the type described above.
  • the drive spindle has an outer contour which is positively against rotation in the circumferential direction with the Inner contour of the coupling module is paired or mating.
  • the hand tool comprises a flange which is connected by means of a rotation in the circumferential direction positively against rotation with the drive spindle or connectable.
  • the hand tool according to the invention can advantageously be further developed by the features explained with reference to the clamping device in a corresponding manner.
  • FIG. 1 shows a preferred embodiment of a clamping device according to the invention together with a tool disk and a hand tool
  • FIG. 2 shows the clamping device of FIG. 1 in front and rear view
  • FIG. 3 shows the clamping device of Figures 1 and 2 in an exploded view.
  • Fig. 5 shows a second embodiment of a clamping device according to the invention in
  • Fig. 5a shows a third embodiment of a clamping device according to the invention in
  • FIG. 1 A preferred embodiment of a clamping device 10 according to the invention is shown in Fig. 1.
  • the clamping device 10 serves to clamp a tool disk 300 in the axial direction AR.
  • the tool disk 300 is to be clamped between the clamping device 10 and a flange 30, wherein the flange 30 is associated with a drive spindle 20 of a hand tool 100.
  • the flange 30 has an anti-rotation 24 in the form of a lateral recess, so that the set on the drive spindle 20 flange in the circumferential direction U positively against rotation with the drive spindle 20 is connected.
  • the clamping device 10 has a screw 2 which is screwed into an end-side internal thread 22 of the drive spindle 20 for clamping the tool disk 300.
  • a coupling module 1 of the tensioning device 10 provided according to the invention can already be seen, in which the screw 2 is mounted centrally.
  • the inner contour according to the invention will be explained in more detail later with reference to FIG. 2.
  • the tensioning device 10 has a hand knob 3.
  • This serves for manual screwing of the screw 2 in the internal thread 22 and thus for axial clamping of the tool disk 300 between the clamping device 10 and flange 30.
  • the hand knob 3 is formed in the circumferential direction U positively against rotation with the screw 2.
  • a head of the screw 12 by way of example has an outer hexagonal contour which is embedded in a corresponding hexagonal inner contour of the hand knob 3.
  • the hexagonal contour almost any other suitable contour can be used.
  • the drive spindle 20 has an outer contour, which in the present case is designed, for example, as a hexagonal profile.
  • a form-fitting twist-proof mating between coupling module 1 and outer contour 26 is achieved when the clamping device 10 is tensioned, the coupling module 1 at least partially through a central opening 301 of the tool disk 300th protrudes.
  • FIG. 2 now shows the tensioning device 10 of FIG. 1 in a plan view (FIG. 2A) and in a bottom view (FIG. 2B).
  • the Clamping device 10 also has a clamping member, which is formed here by way of example in the form of a plate-shaped spring plate 4. By means of the spring plate 4, the actual clamping force is applied to the tool disk 300.
  • Fig. 2B the central screw 2 of the clamping device 10 is clearly visible.
  • the screw is mounted in the coupling module 1 of the clamping device 10, more precisely, the screw 2 is mounted coaxially in the coupling module 1.
  • Good to see is a cylindrical portion 13 of the coupling module 1, wherein the cylindrical portion 13 at least partially clamped tool disk 300 through the central opening 301 of the tool disk 300 (see Fig. 1).
  • the coupling module 1 has an inner contour 16 which can be mated in a form-fitting manner in the circumferential direction UR against rotation with the drive spindle 20 (see FIG.
  • the inner contour 16 is formed as a hexagonal profile.
  • FIG. 3 shows now the preferred embodiment of the clamping device 10 of the preceding figures in an exploded view.
  • the screw 2 with its screw head 12, which by way of example has an outer hexagonal contour, can be seen in the upper region of FIG.
  • a thread 14 of the screw 2 can be seen, which is to be screwed into an internal thread (compare Fig. 1: internal thread 22).
  • the screw 2 is mounted in the coupling module 1 via a roller bearing, preferably an angular contact ball bearing 5.
  • An elastomer ring 6 shown underneath the hand knob 3 serves inter alia to hold the outer contour of the screw head 12 within a corresponding inner contour of the hand knob 3. This can be seen in particular from FIG. 4.
  • the collar 1 1 is designed and provided to transmit an applied over the hand knob 3 and the screw 2 clamping force to the spring plate 4.
  • the coupling module 1 is in the circumferential direction U positively against rotation with the spring plate 4 paired, paired in the assembled state. This is preferably true for all embodiments.
  • the module contour 19 is designed as an external square.
  • Detect below the coupling module 1 is a retaining ring 7, by means of which the coupling module 1 is held on the screw 2.
  • the tendon, here in the form of the spring plate 4 is held by means of a locking ring 8 on the coupling module 1.
  • the flange 30 (see Fig. 1) is placed on the drive spindle 20 of the power tool 100.
  • the flange 30 in the circumferential direction U positive fit against rotation with the drive spindle 20 is connected.
  • the cutting disk 300 is inserted.
  • the inner contour 16 in this case hexagon socket
  • the outer contour 26 of the drive spindle 20 in a form-fitting rotation-proof engagement.
  • this is done before the thread 14 of the screw 2 enters the internal thread 22 of the drive spindle 20.
  • the radial clamping is achieved in that the preferably provided rolling bearing is designed as an angular contact ball bearing 5, which by way of example has a contact angle BW of 40 ° (see also Fig. 5). As a result, a Kopfreibung the screw head 2 is increased, which avoids unintentional release of the clamping device 10.
  • the elastomer ring 6 holds in interaction with the retaining ring 7, the coupling module 1 on the screw 2.
  • An illustrated below the spring plate 4 circlip 8 is used to hold the clamping plate 4 on the coupling module. 1
  • FIG. 5 shows a further preferred exemplary embodiment of a tensioning device 10 according to the invention.
  • a rolling bearing in the form of an angular ball bearing 5 is provided between coupling module 1 and screw 2, which has a contact angle BW of 40 ° (by way of example).
  • the embodiment of FIG. 5 has a stop 9, via which a deflection of the clamping member, which is designed here as spring plate 4, can be limited.
  • a rolling bearing in the form of an angular contact ball bearing 5 is provided, which has a contact angle BW of 40 ° (by way of example).
  • a plate spring 6a is provided between an underside of the hand knob 3 and an upper side of the collar of the coupling module 1 1, so that the spring force of the plate spring 6 a on the underside of the hand knob 3 and the top of the collar of the coupling module 11 acts.
  • the disc spring 6a thus positioned serves inter alia to hold the outer contour of the screw head 12 within a corresponding inner contour of the hand knob 3.

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)
  • Clamps And Clips (AREA)
  • Portable Power Tools In General (AREA)

Abstract

L'invention concerne un dispositif de serrage (10) servant à assembler par serrage axial (AR) un disque d'outil (300) à une bride (30) associée à une broche d'entraînement (20) d'une machine-outil manuelle (100). Le dispositif de serrage (10) comporte une vis (2) qui, pour immobiliser par serrage le disque d'outil (300), est à visser dans un filetage intérieur (22) de la broche d'entraînement (20). La vis (2) est montée dans un module de couplage (1) du dispositif de serrage (10). Le module de couplage (1) comporte un contour intérieur (16) qui est accouplé ou peut être accouplé à la broche d'entraînement (20) de manière imperdable par complémentarité de forme dans la direction périphérique (U).
EP18783530.1A 2017-10-27 2018-10-16 Dispositif de serrage et machine-outil manuelle Active EP3700710B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23173701.6A EP4227040A1 (fr) 2017-10-27 2018-10-16 Dispositif de serrage et machine-outil portative

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17198870.2A EP3476539A1 (fr) 2017-10-27 2017-10-27 Dispositif de serrage et machine-outil manuelle
PCT/EP2018/078225 WO2019081275A1 (fr) 2017-10-27 2018-10-16 Dispositif de serrage et machine-outil manuelle

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP23173701.6A Division EP4227040A1 (fr) 2017-10-27 2018-10-16 Dispositif de serrage et machine-outil portative
EP23173701.6A Division-Into EP4227040A1 (fr) 2017-10-27 2018-10-16 Dispositif de serrage et machine-outil portative

Publications (2)

Publication Number Publication Date
EP3700710A1 true EP3700710A1 (fr) 2020-09-02
EP3700710B1 EP3700710B1 (fr) 2023-07-26

Family

ID=60190723

Family Applications (3)

Application Number Title Priority Date Filing Date
EP17198870.2A Withdrawn EP3476539A1 (fr) 2017-10-27 2017-10-27 Dispositif de serrage et machine-outil manuelle
EP18783530.1A Active EP3700710B1 (fr) 2017-10-27 2018-10-16 Dispositif de serrage et machine-outil manuelle
EP23173701.6A Pending EP4227040A1 (fr) 2017-10-27 2018-10-16 Dispositif de serrage et machine-outil portative

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17198870.2A Withdrawn EP3476539A1 (fr) 2017-10-27 2017-10-27 Dispositif de serrage et machine-outil manuelle

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP23173701.6A Pending EP4227040A1 (fr) 2017-10-27 2018-10-16 Dispositif de serrage et machine-outil portative

Country Status (5)

Country Link
US (1) US12011802B2 (fr)
EP (3) EP3476539A1 (fr)
JP (1) JP7097957B2 (fr)
CN (1) CN111278601A (fr)
WO (1) WO2019081275A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112846385B (zh) * 2021-01-08 2022-07-26 山东聊城鼎诚激光设备有限公司 一种用于防弹玻纤板等距切割设备
CA3152398A1 (fr) 2021-03-18 2022-09-18 Techtronic Cordless Gp Mandrin et accessoire d'outil rotatif
CN113696107A (zh) * 2021-09-08 2021-11-26 江苏锋泰工具有限公司 一种减震轻型橡胶金刚石磨轮
CN113681474A (zh) * 2021-09-08 2021-11-23 江苏锋泰工具有限公司 一种减震轻型橡胶金刚石磨轮的制备方法
USD1102495S1 (en) 2022-03-16 2025-11-18 Techtronic Cordless Gp Mandrel
EP4534244A1 (fr) 2023-10-05 2025-04-09 Hilti Aktiengesellschaft Dispositif de serrage pour fixer une plaquette d'outil à une machine-outil, machine-outil et procédé de fixation

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Publication number Priority date Publication date Assignee Title
US3266535A (en) * 1964-06-01 1966-08-16 Singer Co Safety blade clamping means for portable power saws
DE6909435U (de) * 1969-03-07 1969-07-10 Metabowerke Kg Aufspannvorrichtung fuer das saegeblatt bei einer kreissaege
JPS49146591U (fr) 1973-04-13 1974-12-18
JPS6124153U (ja) 1984-07-13 1986-02-13 芝浦メカトロニクス株式会社 デイスクグラインダ
DE3841181A1 (de) * 1988-12-07 1990-06-13 Bosch Gmbh Robert Handwerkzeugmaschine mit einer mehrteiligen handbetaetigbaren schnellspanneinrichtung
CA2092701A1 (fr) * 1990-09-12 1992-03-13 Norman Leslie Matthews Fixation
JPH0727121A (ja) * 1993-06-30 1995-01-27 Jacobs Japan Inc 締付け用ネジ
JPH07229743A (ja) 1994-02-18 1995-08-29 Haruaki Yamashita レーザ望遠鏡及びレーザ通信方法
JPH07299743A (ja) * 1994-05-10 1995-11-14 Ryobi Ltd 工具の締付装置
US6273659B1 (en) * 1997-02-17 2001-08-14 Power Tool Holders Incorporated Locking mechanism for a rotary working member
US6843627B2 (en) * 2001-12-12 2005-01-18 Credo Technology Corporation Wrenchless blade clamp assembly
WO2008084636A1 (fr) 2007-01-09 2008-07-17 Makita Corporation Dispositif de fixation pour outil à lame tournante
JP4964642B2 (ja) * 2007-03-27 2012-07-04 株式会社マキタ 回転刃具の固定装置
CN201284780Y (zh) 2008-08-18 2009-08-05 强网工业股份有限公司 容易装卸的锁紧装置
WO2015075001A1 (fr) * 2013-11-25 2015-05-28 Robert Bosch Gmbh Système de boulon sans outil pour une lame de scie
JP6400460B2 (ja) * 2014-01-30 2018-10-03 株式会社マキタ 切断機
KR101578730B1 (ko) 2014-09-22 2015-12-21 계양전기 주식회사 그라인더 휠 잠금장치
EP3202533A1 (fr) 2016-02-02 2017-08-09 HILTI Aktiengesellschaft Dispositif de serrage
CN205552271U (zh) 2016-03-18 2016-09-07 浙江亚特电器有限公司 一种抛光机
US20170276166A1 (en) * 2016-03-22 2017-09-28 Donald L Gunnin Backing nuts holder

Also Published As

Publication number Publication date
JP2020536760A (ja) 2020-12-17
CN111278601A (zh) 2020-06-12
EP3476539A1 (fr) 2019-05-01
US20200324385A1 (en) 2020-10-15
EP4227040A1 (fr) 2023-08-16
EP3700710B1 (fr) 2023-07-26
JP7097957B2 (ja) 2022-07-08
WO2019081275A1 (fr) 2019-05-02
US12011802B2 (en) 2024-06-18

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