EP2006058A1 - Dispositif de serrage destiné au serrage fixe sans outil - Google Patents

Dispositif de serrage destiné au serrage fixe sans outil Download PDF

Info

Publication number: EP2006058A1
Authority: EP; European Patent Office
Prior art keywords: thread; flange; handwheel; clamping device; threaded
Prior art date: 2007-06-20
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

EP08008708A

Other languages

German (de)

English (en)

Other versions

EP2006058B1 (fr

Inventor

Reiner Schulz

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.)

Metabowerke GmbH and Co

Original Assignee

Metabowerke GmbH and Co

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.)

2007-06-20

Filing date

2008-05-09

Publication date

2008-12-24

2008-05-09 Application filed by Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co

2008-12-24 Publication of EP2006058A1 publication Critical patent/EP2006058A1/fr

2010-04-28 Application granted granted Critical

2010-04-28 Publication of EP2006058B1 publication Critical patent/EP2006058B1/fr

Status Active legal-status Critical Current

2028-05-09 Anticipated expiration legal-status Critical

Images

Classifications

- 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
- 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

the invention relates to a clamping device for tool-free axial clamping of a disc-shaped tool with the features of the preamble of claim 1.
Clamping devices of the type in question are for stationary machine tools and hand tool machines in which a disc-shaped tool replaced from time to time due to wear and a new tool must be tightened, known for a long time.
Machine tools of the type in question are in particular table saws, circular saws, angle grinders etc ..
Tools of the type in question are in particular saw blades, grinding wheels, rubber plates or the like.
clamping devices of the type in question are to be able to work without tools.
a problem consists in the fact that the clamping device must be designed so that they can not solve themselves in the operation of the machine tool by itself. This causes the clamping device to tighten itself in operation of the machine tool on its own. Therefore you have to use to release the tool usually large-sized auxiliary tools.
One way to work without tools is to make the handwheel in one piece with the threaded connector and screw the threaded connector to the drive shaft block.
the spring element is designed as a strong helical compression spring and defines the force for axial clamping of the tool to the flange of the drive shaft ( DE-A-30 12 836 ). This construction ensures that the clamping device does not tighten further by itself during operation of the machine tool.
the contact pressure for axial clamping of the tool which is applied by means of the spring, but is sometimes too low for example table saws and other highly stressed machines.
the tensioning device from which the invention proceeds ( DE-A-37 00 968 ), one achieves a high, not only applied by a spring force for axial clamping of the tool on the flange of the drive shaft, characterized in that the handwheel is separated from the threaded neck and between the handwheel and the threaded connector is a power transmission connection.
the power transmission connection is designed as a planetary gear.
the construction of the clamping device with planetary gear is of course relatively expensive.
the teaching is therefore based on the problem, a generic clamping device in such a way that it achieves the desired axial unloading function when releasing the clamping device, without a transmission, in particular a planetary gear, must be used.
the threaded connector of the clamping device is provided with two threads of different pitch.
the base pitch with large pitch allows quick attachment of the tensioner to the drive shaft.
the handwheel with the additional thread does not yet come into operation.
the tensioning device can be handled as a unit such as a conventional clamping nut. In the course of the clamping movement when clamping a tool, the handwheel comes into operation. Its additional thread for the additional thread on the threaded neck has a much lower pitch than the base thread. Accordingly, on the last stretch of the Clamping movement of the pressure flange on the hand wheel a considerable contact pressure can be achieved.
the return spring located between the handwheel and the threaded connector ensures that the additional mating thread on the handwheel on the additional thread on the threaded connector can not be moved to block. Excessive tightening at this point is prevented.
the clamping device When releasing the clamping device thus the frictional engagement of the pressure flange on the tool can be overcome by hand, the clamping device can be used without tools.
Clamping device according to the invention shown in a first embodiment is used for tool-free axial clamping of a disk-shaped tool 1 of a machine tool.
a machine tool Especially it may be a saw blade of a table saw or the like. act.
hand-held machine tools such as a circular saw, an angle grinder or other machine tool that uses a disc-shaped tool 1, require such a clamping device.
Fig. 1 and 2 shows only the clamping device, not the tool 1 and additional components of the machine tool. According to the second embodiment Fig. 4 However, these components are drawn. The same can be done in the first embodiment according to Fig. 1 and 2 appearance.
the basic structure of the clamping device in conjunction with the associated components of the machine tool based on Fig. 4 explained.
Fig. 4 Shown in Fig. 4 is a pressure disk 1 'for the tool 1 and a flange 2 on a drive shaft 3 of the machine tool.
the illustration makes it clear that these parts do not belong to the clamping device itself.
the clamping device is tuned to the particular circumstances of a particular machine tool. Such a circumstance is the fact that the flange-side end of the drive shaft 3 of the machine tool has a thread 4 with a certain pitch, which serves to fasten the tensioning device to the drive shaft 3.
the clamping device itself ( Fig. 1 . 3 and 4 ) has a central threaded connector 5 with a thread 4 of the drive shaft 3 matching base thread 6. This can be screwed to the thread 4 of the drive shaft 3.
the central threaded connector 5 further has a socket-side flange 7, on which the base thread 6 ends.
the handwheel 8 carries outside a handle ring 9, for example made of thermoplastic material to a to achieve better grip of the handwheel 8.
the hand wheel 8 has a much larger diameter than the threaded connector 5, so that it is good and comfortable by the hand of an operator and can be packed with good efficiency.
a power transmission connection Between the handwheel 8 and the threaded connector 5 is a power transmission connection.
the return spring 13 forms here at the same time a frictional rotational drive connection of the handwheel 8 with the threaded connector 5, so that the handwheel 8 can be rotated with the threaded connector 5 as a unit, as long as the opposing forces do not exceed a certain level.
the rotary driving connection by the return spring 13 may also be a surmountable positive rotational drive connection, for example by a wave-shaped embodiment of the return spring 13 or an additional wave-shaped disc.
Fig. 1 One recognizes in Fig. 1 in that here the handwheel 8 with the threaded connection 5 forms a unit which can be screwed together with the thread 4 of the drive shaft 3.
the return spring 13 between the handwheel 8 and the threaded connector 5 By the return spring 13 between the handwheel 8 and the threaded connector 5, a frictional engagement is generated here, which allows handling of the clamping device as a unit. If this unit is screwed by means of the base thread 6 on the threaded connector 5 in the (not shown here) thread 4 of the drive shaft 3, so continues this until the socket-side flange 7 meets the end face of the drive shaft 3. Now a further screwing of the base thread 6 with the thread 4 is no longer possible.
the drive shaft 3 as a thread 4 has an external thread on which the internal thread designed as a base thread 6 of the threaded connector 5 is screwed.
This construction is also possible with the clamping device according to the invention.
This in Fig. 1 illustrated embodiment shows that here the base thread 6 is carried out on the threaded connector 5 as an external thread, in such a way that it ends at the nozzle-side flange 7. This fits a hollow, internally threaded drive shaft 3 ( Fig. 4 ).
the additional thread 10 on the threaded connector 5 is designed as an external thread. Accordingly, then the additional mating thread 11 on the handwheel 8 is an internal thread. Again, the reverse arrangement could be realized without changing the operating principle of the clamping device according to the invention something.
Fig. 1 further shows a construction by which it is ensured that the handwheel 8 is secured to the threaded connector 5 against unscrewing.
the illustrated embodiment has the threaded connector 5 between the Stutzen-side flange 7 and the support flange 12 for the return spring 13 an annular groove 15, projecting into the radially from the outside blocking pins 16 on the handwheel 8.
This allows the handwheel 8 only up to the in Fig. 1 shown extent against the threaded connector 5 are screwed up. Is that in Fig. 1 Reaches the handwheel 8 then the threaded connector 5 so that the base thread 6 can be unscrewed from the thread 4 of the drive shaft 3.
Fig. 2 shows the handwheel 8 in plan view and dashed in plan view not visible to areas with the blocking pins 16 in the annular groove 15th
the illustrated embodiment shows the embodiment of the return spring 13 as a plate spring.
a plate spring could be e.g. be provided an elastically deformable spring washer or a wave washer made of spring steel. It is essential that on the one hand the restoring spring action is provided, on the other hand a frictional rotational drive of the threaded neck 5 is ensured by the handwheel 8 when screwing the base thread 6 in the thread 4 of the drive shaft 3.
a helical compression spring there is also a helical compression spring.
Fig. 1 It is shown that the return spring 13 is well protected within the clamping device and thus arranged insensitive to contamination. Namely, it is provided that the return spring 13 is arranged in a chamber 17 formed between the handwheel 8 and the support flange 12 on the threaded connector 5.
FIG. 3 to 6 shown further embodiment initially shows a similar construction as that in the Fig. 1 and 2 illustrated first embodiment.
the tool 1 with the pressure disk 1 'located on the flange 2 of the drive shaft 3 so that the relationships can be understood with built-clamping device.
the Fig. 3 4 and 5 are the same reference numerals for the same components as in the Fig. 1 and 2 used.
Fig. 4 it can be seen that the nozzle-side flange 7 of the threaded neck 5 is not axially engageable on the tool 1, but only on the front side of the drive shaft 3. It is thus the case that the frictional clamping of the tool 1 with the pressure disk 1 'on the flange 2 of the drive shaft 3 takes place only by means of the pressure flange 14 on the handwheel 8. This leads to the inventively convenient tool-free solubility of the clamping device, although no complicated transmission is provided.
FIG. 3 A comparison of FIG. 3 and FIG. 4 further shows the following:
Fig. 3 the handwheel 8 has been largely screwed upward relative to the threaded connector 5 on the additional thread 10 until shortly before blocking by the annular flange of the locking screw 18. This is the starting position of the clamping device. In this position, the clamping device can be handled as a unit because of the frictional coupling of handwheel 8 and threaded connector 5 by the return spring 13 in the chamber 17.
FIG. 3 and 4 show, moreover, a further embodiment of the clamping device according to the invention such that between the pressure flange 14 and the handwheel 8 additionally a friction-reducing intermediate element 20 is arranged.
it is a roller bearing assembly.
This shows a lower, the pressure flange 14 forming bearing disc, about the bearing rollers 21 and above an upper bearing plate 22, which in turn bears frictionally on the handwheel 8.
Fig. 1 between the pressure flange 14 and the tool 1 existing sliding friction is replaced in this embodiment by the realized in the intermediate element 20 - lower - rolling friction ( Fig. 4 ).
Fig. 6 shows for further explanation a perspective view of a clamping device according to Fig. 3 in which one recognizes particularly well the existing of elastomeric gripper ring 9 on the handwheel 8.

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Wood Science & Technology (AREA)
Forests & Forestry (AREA)
Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Gripping On Spindles (AREA)
Automatic Tool Replacement In Machine Tools (AREA)
Mounting, Exchange, And Manufacturing Of Dies (AREA)

EP08008708A 2007-06-20 2008-05-09 Dispositif de serrage destiné au serrage fixe sans outil Active EP2006058B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102007028892A DE102007028892B3 (de)	2007-06-20	2007-06-20	Spanneinrichtung zum werkzeuglosen Festspannen

Publications (2)

Publication Number	Publication Date
EP2006058A1 true EP2006058A1 (fr)	2008-12-24
EP2006058B1 EP2006058B1 (fr)	2010-04-28

Family

ID=39672979

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP08008708A Active EP2006058B1 (fr)	2007-06-20	2008-05-09	Dispositif de serrage destiné au serrage fixe sans outil

Country Status (3)

Country	Link
EP (1)	EP2006058B1 (fr)
AT (1)	ATE465855T1 (fr)
DE (2)	DE102007028892B3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP2210720A1 (fr) *	2009-01-21	2010-07-28	Felder KG	Dispositif de fixation d'outil de rotation fonctionnant par friction
WO2015075001A1 (fr) *	2013-11-25	2015-05-28	Robert Bosch Gmbh	Système de boulon sans outil pour une lame de scie
US20150209975A1 (en) *	2014-01-30	2015-07-30	Makita Corporation	Cutting devices
CN111618365A (zh) *	2020-06-28	2020-09-04	北京凝华科技有限公司	一种中心定位装置及其使用方法
CN115722730A (zh) *	2022-11-11	2023-03-03	张家港市圣鼎源制管有限公司	一种钢管切割设备用锯片定位结构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE202009000482U1 (de)	2009-01-13	2010-05-27	Metabowerke Gmbh	Spanneinrichtung zum werkzeuglosen Festspannen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CH449931A (de) *	1966-12-06	1968-01-15	Perles Elektrowerkzeuge & Moto	Spannvorrichtung für das Blatt einer Handkreissäge
DE3012836A1 (de)	1980-04-02	1981-10-08	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	Vorrichtung zum festspannen der schleifscheibe von winkelschleifern
DE3700968A1 (de)	1987-01-15	1988-08-04	Bosch Gmbh Robert	Spanneinrichtung zum axialen festspannen eines werkzeuges, insbesondere einer scheibe
DE3826017A1 (de) *	1987-09-16	1989-03-30	Metabowerke Kg	Vorrichtung zum spannen von scheibenfoermigen werkzeugen an einer handwerkzeugmaschine
DE10258372A1 (de) *	2001-12-12	2003-06-26	S B Power Tool Company Broadvi	Blattspannaufbau
US20060096436A1 (en) *	2002-02-15	2006-05-11	Alan Phillips	Blade clamp assembly

2007
- 2007-06-20 DE DE102007028892A patent/DE102007028892B3/de not_active Expired - Fee Related
2008
- 2008-05-09 DE DE502008000591T patent/DE502008000591D1/de active Active
- 2008-05-09 AT AT08008708T patent/ATE465855T1/de active
- 2008-05-09 EP EP08008708A patent/EP2006058B1/fr active Active

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CH449931A (de) *	1966-12-06	1968-01-15	Perles Elektrowerkzeuge & Moto	Spannvorrichtung für das Blatt einer Handkreissäge
DE3012836A1 (de)	1980-04-02	1981-10-08	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	Vorrichtung zum festspannen der schleifscheibe von winkelschleifern
DE3700968A1 (de)	1987-01-15	1988-08-04	Bosch Gmbh Robert	Spanneinrichtung zum axialen festspannen eines werkzeuges, insbesondere einer scheibe
DE3826017A1 (de) *	1987-09-16	1989-03-30	Metabowerke Kg	Vorrichtung zum spannen von scheibenfoermigen werkzeugen an einer handwerkzeugmaschine
DE10258372A1 (de) *	2001-12-12	2003-06-26	S B Power Tool Company Broadvi	Blattspannaufbau
US20060096436A1 (en) *	2002-02-15	2006-05-11	Alan Phillips	Blade clamp assembly

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP2210720A1 (fr) *	2009-01-21	2010-07-28	Felder KG	Dispositif de fixation d'outil de rotation fonctionnant par friction
WO2015075001A1 (fr) *	2013-11-25	2015-05-28	Robert Bosch Gmbh	Système de boulon sans outil pour une lame de scie
CN105916647A (zh) *	2013-11-25	2016-08-31	罗伯特·博世有限公司	用于锯片的免工具螺栓系统
US20160288359A1 (en) *	2013-11-25	2016-10-06	Robert Bosch Gmbh	Tool free bolt system for a saw blade
US10549449B2 (en) *	2013-11-25	2020-02-04	Robert Bosch Gmbh	Tool free bolt system for a saw blade
US20150209975A1 (en) *	2014-01-30	2015-07-30	Makita Corporation	Cutting devices
JP2015163422A (ja) *	2014-01-30	2015-09-10	株式会社マキタ	切断機
US9789624B2 (en) *	2014-01-30	2017-10-17	Makita Corporation	Cutting devices
DE102015001146B4 (de) *	2014-01-30	2020-10-08	Makita Corporation	Schneidevorrichtung
CN111618365A (zh) *	2020-06-28	2020-09-04	北京凝华科技有限公司	一种中心定位装置及其使用方法
CN115722730A (zh) *	2022-11-11	2023-03-03	张家港市圣鼎源制管有限公司	一种钢管切割设备用锯片定位结构

Also Published As

Publication number	Publication date
ATE465855T1 (de)	2010-05-15
DE102007028892B3 (de)	2008-12-04
DE502008000591D1 (de)	2010-06-10
EP2006058B1 (fr)	2010-04-28

Publication	Publication Date	Title
EP0330672B1 (fr)	1991-07-03	Dispositif de serrage pour le blocage axial d'un outil, notamment d'une meule
EP0334864B1 (fr)	1993-02-03	Dispositif de serrage pour bloquer un outil, un disque en particulier, suivant une direction axiale
DE69423045T2 (de)	2001-01-25	Schraube zum befestigen
DE3841181C2 (fr)	1990-11-29
EP3411185B1 (fr)	2023-10-18	Dispositif de serrage
CH648505A5 (de)	1985-03-29	Zuendkerzenschluessel, bei dem sich das in einer richtung maximal zu uebertragende drehmoment einstellen laesst.
DE202013101235U1 (de)	2013-05-06	Drehmomentschlüssel
WO1988006075A1 (fr)	1988-08-25	Dispositif de serrage axial d'outils, en particulier de meules
DE102006001986A1 (de)	2007-07-19	Spannvorrichtung zum lösbaren Befestigen eines scheibenförmigen Werkzeugs
EP2006058B1 (fr)	2010-04-28	Dispositif de serrage destiné au serrage fixe sans outil
CH670063A5 (fr)	1989-05-12
EP3279492B1 (fr)	2021-11-17	Dispositif de blocage pour outils
EP0239670B1 (fr)	1991-01-30	Machine motorisée avec réglage du couple, en particulier outillages électriques
DE3523746A1 (de)	1987-01-08	Schnellspannvorrichtung fuer rotierende scheibenfoermige werkzeuge
DE3919648C2 (de)	1998-01-29	Winkelschrauber
CH686238A5 (de)	1996-02-15	Handwerkzeugmaschine, insbesondere Winkelschleifmaschine.
DE2215322A1 (de)	1972-10-05	Drehbare Schraubmutterverbindung
DE29708201U1 (de)	1997-07-10	Schrittweiser kraftverstärkender Schraubstock in Planetengetriebezug-Bauart
DE202009000482U1 (de)	2010-05-27	Spanneinrichtung zum werkzeuglosen Festspannen
DE19938299B4 (de)	2005-03-03	Werkzeugmaschine mit einer Antriebseinrichtung zum Antreiben eines rotierenden Maschinenwerkzeugs
EP1559509B1 (fr)	2007-01-10	Dispositif de fixation d'un outil de meulage à une machine-outil
EP1533091A1 (fr)	2005-05-25	Dispositif de serrage pour un élément d'usinage d'une machine outil
DE923709C (de)	1955-02-21	Werkzeughalter fuer die Schraubbefestigung von Fraesern oder aehnlichen drehend arbeitenden Werkzeugen
DE4017406A1 (de)	1991-12-05	Spanneinrichtung zum axialen festspannen eines werkzeuges, insbesondere einer scheibe
DE10137625B4 (de)	2005-01-27	Schnellspannmutter

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