EP0334864A1 - Dispositif de serrage pour bloquer un outil, un disque en particulier, suivant une direction axiale. - Google Patents

Dispositif de serrage pour bloquer un outil, un disque en particulier, suivant une direction axiale.

Info

Publication number
EP0334864A1
EP0334864A1 EP19870907667 EP87907667A EP0334864A1 EP 0334864 A1 EP0334864 A1 EP 0334864A1 EP 19870907667 EP19870907667 EP 19870907667 EP 87907667 A EP87907667 A EP 87907667A EP 0334864 A1 EP0334864 A1 EP 0334864A1
Authority
EP
European Patent Office
Prior art keywords
clamping
tool
nut
fork
axially
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
EP19870907667
Other languages
German (de)
English (en)
Other versions
EP0334864B1 (fr
Inventor
Manfred Staebler
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT87907667T priority Critical patent/ATE85257T1/de
Publication of EP0334864A1 publication Critical patent/EP0334864A1/fr
Application granted granted Critical
Publication of EP0334864B1 publication Critical patent/EP0334864B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools

Definitions

  • Clamping device for axially clamping a tool, in particular a disk
  • the invention is based on a clamping device for axially clamping a tool, in particular a disk, according to the generic preamble of the main claim.
  • Clamping devices of this type are particularly suitable for portable hand-held machine tools and, in particular, for grinding machines.
  • a tensioning device of the type mentioned is known (DE-PS 30 12 836), in which the tensioning element consists of an element which is approximately hat-shaped in cross section and is axially supported by a helical spring against the flange of the tensioning nut.
  • this f does not have to be held against the spindle with an additional auxiliary tool, e.g. a key, when unscrewing the clamping nut.
  • the clamping nut can still be of conventional design, for example in accordance with standards, so that a key can still be attached for particularly stubborn cases, for example with a rusting clamping nut, and the clamping nut can be loosened with this auxiliary tool.
  • Fig. 1 shows a schematic axial longitudinal section of a clamping device as part of an angle grinder with clamped
  • FIG. 4 shows a schematic bottom view of the clamping nut in the direction of arrow IV in FIG. 2.
  • Fig. 1 the lower part of a e.g. Shown as an angle grinder, portable hand-held machine tool, which has a motor-driven spindle 10 driven by a gear, which at the end has an annular shoulder 11 in a cylindrical shoulder 12 of smaller diameter and then in an end-side threaded shoulder 13 with an external thread 14 transforms.
  • the spindle 10 serves to drive a tool 15 which e.g. from the indicated grinding wheel or another tool disk, a rubber or the like. consists.
  • the tool 15 is clamped and clamped between a flange 16 and a clamping nut 17.
  • the flange 16 is axially supported on the annular shoulder 11 and centered radially on the cylindrical shoulder 12. It is positively coupled to the spindle 10.
  • the clamping nut 17 has a flange 18 and a cylindrical sleeve part 19 extending therefrom and is provided with a continuous internal thread 20 with which the clamping nut 17 is screwed onto the external thread 14 of the threaded shoulder 13.
  • the tool 15 is centered on the outer circumferential surface of the cylinder sleeve part 19 when fastening.
  • a clamping member 21 is arranged, which here consists of a clamping fork 22.
  • the clamping fork 22 has two curved fork legs 23, 24, which together form an approximately semicircular curved part from which a handling nose 25 strives.
  • This clamping member 21 can be acted upon by the clamping nut 17 with an axially directed compressive force and is able to press axially against the tool 15 and to press it against the axial end face of the flange 16.
  • the tensioning member 21 in the form of the special tensioning fork 22 is held movable relative to the tensioning nut 17 between a tensioning position shown in FIG. 1 and a release position, not shown.
  • Each end 26, 27 of the fork leg 23, 24 has an axially directed pressure surface 28 or 29, which drops axially in the direction of movement from the tensioned position (FIG. 1) to the release position.
  • the tendon is
  • the respective pressure surface 28, 29 has a flattening 34 or 35 (FIG. 3), for example in the area of greatest eccentricity e max, or instead a surface part with already reduced eccentricity. 1 and 3, this ensures a stable clamping position about the swivel axis 30.
  • the clamping nut 17 can act axially directly on the tool 15 with the pressure surfaces 28, 29 of the clamping fork 22.
  • a better pressure distribution in the circumferential direction is achieved if an intermediate member in the form of a pressure disc 36 is arranged between the tool 15 and the pressure surfaces 28, 29, which in turn is acted upon by the eccentric pressure surfaces 28, 29 and with one end face presses axially against the tool 15.
  • the thrust washer 36 is also centered on the cylinder sleeve part 19 of the clamping nut 17 and is guided in an axially movable manner.
  • each end 26, 27 of the fork leg 23 or 24 with the eccentric pressure surface 28 or 29 projects axially beyond the end face 37 of the flange 18 of the clamping nut 17 facing the tool 15 , so that the clamping nut 17 alone with this pressure surface 28, 29 exerts axial pressure on the pressure plate 36 on the tool 15.
  • Openings 38 and 39 are contained in the flange 18 along the pivot axis 30 and diametrically opposite one another, in which at least the ends 26 and 27 of the fork legs 23 and 24 are received. If the ends 26, 27 of each fork leg 23 or 24 are bent accordingly far away from it, the clamping fork 22 can be in the clamping position according to FIGS. 1, 3 on the end face 40 pointing downwards in FIG.
  • FIGS. 2 and 4 Another advantageous embodiment results from FIGS. 2 and 4.
  • depressions 41, 42 are contained, which are dimensioned so wide and deep that, when the clamping fork 22 is in the clamping position, the two curved fork legs thereof 23, 24 in the recess 41 and their handling lug 25 find space in the recess 42 so that the clamping fork 22 does not protrude axially beyond the lower end face 40 of the clamping nut 17.
  • FIG. 1 shows the clamping device in the clamping position, in which the tool 15 is clamped axially on the flange 16 via the clamping nut 17 with a clamping fork 22 and via the pressure plate 36.
  • the clamping fork 22 is first pivoted downward about the pivot axis 30 in FIGS. 1 and 3 by engaging the handling nose 25 in the direction of the arrow 33.
  • the pressure surface 28, 29 slides along the facing end surface of the pressure disk 36, the surface area of greatest eccentricity e max being pivoted away and a surface area with a decreasing eccentricity depending on the pivoting angle reaching up to e min in this area.
  • the procedure is as follows. First, the flange 16 is pushed onto the spindle 10. Thereafter, the new tool 15 is inserted together with the thrust washer 36 and then the clamping nut 17 is placed and screwed onto the threaded shoulder 13. Your cylinder sleeve part 19 passes through the tool 15 and the thrust washer 36, which are centered thereon.
  • the clamping fork 22 is pivoted into its clamping position according to FIGS. 1, 3, in which it is kept stable due to the flats 34, 35.
  • the clamping nut 17 continues to tighten as usual.
  • the clamping device described is extremely simple, inexpensive and fast, safe and easy to use. It enables the tool 15 to be changed quickly and safely without the need for additional special tools. Another advantage is that existing hand tool machines, in particular grinding machines, can also be retrofitted with this clamping device without any other modification. For this purpose, it is generally only necessary to replace their clamping nut by the clamping nut 17 according to the invention with the thrust washer 36. It is also advantageous that when the clamping fork 22 is transferred from the clamping position according to FIG. 1 into the release position, no torque is exerted on the spindle 10, so that handheld power tools equipped with such a clamping device no longer require an integrated spindle locking device.
  • the clamping nut 17 is, moreover, designed so that, if necessary, it can also be attacked by a special tool, e.g. in the form of a two-hole nut driver, so that the clamping nut 17 in particularly stubborn cases, e.g. in the rusted state, can also be solved in the usual way by means of such an auxiliary tool.
  • a special tool e.g. in the form of a two-hole nut driver
  • the clamping device described is suitable for clamping all possible tools 15 and in connection with various types of hand tools. It is particularly suitable for grinding machines, e.g. Angle grinder, and thereby for clamping disc-shaped tools 15.
  • the printing surface 28, 29 is e.g. each provided on a rolling element of the tendon.
  • the rolling element can e.g. consist of an eccentric role.
  • the tension member 21 is designed as a tension fork 22 according to the first embodiment.
  • an intermediate member which enables rolling friction and which has, for example, a plurality of rollers, for example needle bodies, which move from the pressure surfaces when the tension member 21 is moved 28, 29 are axially loaded and allow rolling friction instead of sliding friction.
  • the tendon is held so that it can rotate about an axis of rotation coaxial with the tension nut 17 relative to the tension nut 17. It has an inclined surface which rises in one direction with respect to a flat axial surface of the clamping nut 17 and whose axial distance from the flat axial surface decreases in the direction of rotation from the clamping position to the release position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Gripping On Spindles (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Clamps And Clips (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

Dispositif de serrage pour meuleuse portative, faisant corps avec l'écrou de serrage (17) pouvant être vissé sur la fin de filet (13) de l'écrou, à l'extrémité de l'axe d'entraînement (10) pour serrer une meule (15). L'écrou de serrage (17) porte un collier de serrage (22) positionné de manière à se mouvoir, les extrémités (26, 27) de ses branches (26, 27) étant de chaque côté d'un axe pivotant (30) passant par le diamètre du collier, entre la position serrée et la position desserrée. Les extrémités (26, 27) sont pourvues de surfaces de pression excentriques (28, 29) qui agissent sur la meule (15) dans le sens de l'axe au moyen d'un disque de pression et dont l'excentricité diminue quand elle pivote, à partir de la position serrée vers la position desserrée. Pour débloquer le dispositif, on fait pivoter le collier de serrage (22) autour de l'axe de pivotement, ce qui fait agir les surfaces de pression (28, 29) avec une excentricité réduite. La vis (14, 20) est ainsi desserrée et l'écrou de serrage (17) également desserré au point de pouvoir être totalement dévissé à la main en agissant sur le collier de serrage (22). Il est alors possible de changer la meule rapidement, en toute sécurité et sans aucun outil.
EP87907667A 1986-12-17 1987-11-28 Dispositif de serrage pour bloquer un outil, un disque en particulier, suivant une direction axiale Expired - Lifetime EP0334864B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87907667T ATE85257T1 (de) 1986-12-17 1987-11-28 Spanneinrichtung zum axialen festspannen eines werkzeuges, insbesondere einer scheibe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3643067 1986-12-17
DE19863643067 DE3643067A1 (de) 1986-12-17 1986-12-17 Spanneinrichtung zum axialen festspannen eines werkzeuges, insbesondere einer scheibe

Publications (2)

Publication Number Publication Date
EP0334864A1 true EP0334864A1 (fr) 1989-10-04
EP0334864B1 EP0334864B1 (fr) 1993-02-03

Family

ID=6316387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87907667A Expired - Lifetime EP0334864B1 (fr) 1986-12-17 1987-11-28 Dispositif de serrage pour bloquer un outil, un disque en particulier, suivant une direction axiale

Country Status (8)

Country Link
US (1) US4976071A (fr)
EP (1) EP0334864B1 (fr)
JP (1) JPH02501129A (fr)
AT (1) ATE85257T1 (fr)
BR (1) BR8707918A (fr)
DE (2) DE3643067A1 (fr)
ES (1) ES2005993A6 (fr)
WO (1) WO1988004596A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5518440A (en) * 1993-07-01 1996-05-21 Black & Decker Inc. Power tool flange lock
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

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DE3831236A1 (de) * 1988-09-14 1990-03-15 Licentia Gmbh Einrichtung zum spannen und loesen eines auf der arbeitsspindel eines elektrowerkzeugs befindlichen scheibenfoermigen werkzeugs
US4909113A (en) * 1988-11-01 1990-03-20 Mariupolskii Metallurgicheskii Institut Device for clamping a circular saw blade
AT392230B (de) * 1989-05-29 1991-02-25 Thoeress Josef Vorrichtung zum gleichzeitigen schleifschaerfen saemtlicher saegezaehne eines gattersaegeblattes
RO112778B1 (ro) * 1990-09-12 1997-12-30 Norman Leslie Matthews Dispozitiv de fixare
ES2066512T3 (es) * 1991-07-05 1995-03-01 Fein C & E Maquina herramienta portatil.
US5577872A (en) * 1993-03-15 1996-11-26 Power Tool Holders Incorporated Torque enhancing tightening screw
US5567100A (en) * 1993-03-15 1996-10-22 Power Tool Holders Incorporated Torque enhancing clamping nut
JPH0727121A (ja) * 1993-06-30 1995-01-27 Jacobs Japan Inc 締付け用ネジ
IT1266572B1 (it) * 1993-07-30 1997-01-09 Guido Valentini Congegno per il montaggio e la rimozione manuali di dischi operatori in utensili manuali per la lavorazione di superfici
US5871322A (en) * 1994-12-22 1999-02-16 Power Tool Holders Incorporated Clamp screw
US5964006A (en) * 1997-01-13 1999-10-12 3M Innovative Properties Company Rotary surface treatment tool
US6273659B1 (en) 1997-02-17 2001-08-14 Power Tool Holders Incorporated Locking mechanism for a rotary working member
US5947671A (en) * 1998-01-30 1999-09-07 Power Tool Holders Incorporated Hand actuable clamping device with circumferentially extending tightening members
US6050741A (en) * 1998-01-30 2000-04-18 Power Tool Holders Incorporated Tool clamping device
US6179512B1 (en) 1998-05-29 2001-01-30 Power Tool Holders Incorporated Collet nut
FR2805013B1 (fr) * 2000-02-16 2003-01-10 Diamant Boart Sa Ecrou de serrage et de blocage d'un outil, tel qu'un disque d'une machine d'usinage sur l'arbre de ladite machine
US7013987B2 (en) * 2000-09-08 2006-03-21 Black & Decker Clutch assembly and clamp mechanism for rotary tool disc
DE20117159U1 (de) * 2001-10-16 2002-02-14 C & E Fein Gmbh & Co Kg Werkzeugmaschine mit Befestigungsflansch
US8087977B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Angle grinder
GB0515575D0 (en) * 2005-07-29 2005-09-07 Gmca Pty Ltd Clamping apparatus
US20070149099A1 (en) * 2005-12-23 2007-06-28 Sunmatch Industrial Co., Ltd. Tool-less quick locking screw nut
DE102008050173A1 (de) * 2008-10-01 2010-04-08 Giesecke & Devrient Gmbh Banknotenbearbeitungsvorrichtung
US8905822B2 (en) 2011-10-07 2014-12-09 Black & Decker Inc. Clamp nut
CN103659606A (zh) * 2012-09-17 2014-03-26 广西玉柴机器股份有限公司 金刚砂轮修整工具及修整方法
CN104044062A (zh) * 2013-03-15 2014-09-17 昆山齐升磨料磨具有限公司 一种新型的磨具
US9555554B2 (en) 2013-05-06 2017-01-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US9475172B2 (en) 2014-07-15 2016-10-25 Milwaukee Electric Tool Corporation Adjustable guard for power tool
CN106903611B (zh) * 2017-03-07 2023-06-27 佛山华数机器人有限公司 一种打磨工具的中心标定装置
CN112139892A (zh) * 2020-09-29 2020-12-29 福建泉州南星大理石有限公司 一种水磨石抛光工艺
CN115922564B (zh) * 2023-03-09 2023-07-04 镇江丰成特种工具有限公司 一种磨轮的安装结构

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5518440A (en) * 1993-07-01 1996-05-21 Black & Decker Inc. Power tool flange lock
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

Also Published As

Publication number Publication date
DE3643067A1 (de) 1988-06-23
DE3784077D1 (de) 1993-03-18
WO1988004596A1 (fr) 1988-06-30
EP0334864B1 (fr) 1993-02-03
ES2005993A6 (es) 1989-04-01
US4976071A (en) 1990-12-11
JPH02501129A (ja) 1990-04-19
ATE85257T1 (de) 1993-02-15
BR8707918A (pt) 1990-03-01

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