DE3742430A1 - Tool-clamping device for hand-held angle grinding machine (angle grinder) - Google Patents

Tool-clamping device for hand-held angle grinding machine (angle grinder)

Info

Publication number
DE3742430A1
DE3742430A1 DE19873742430 DE3742430A DE3742430A1 DE 3742430 A1 DE3742430 A1 DE 3742430A1 DE 19873742430 DE19873742430 DE 19873742430 DE 3742430 A DE3742430 A DE 3742430A DE 3742430 A1 DE3742430 A1 DE 3742430A1
Authority
DE
Germany
Prior art keywords
clamping
clamping device
flange
fork
released
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.)
Withdrawn
Application number
DE19873742430
Other languages
German (de)
Inventor
Erhard Pauls
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19873742430 priority Critical patent/DE3742430A1/en
Publication of DE3742430A1 publication Critical patent/DE3742430A1/en
Withdrawn legal-status Critical Current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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

In order [lacuna] the holding in readiness of tools for the clamping of the grinding disc and adjustment and fixing of the protective hood in angle grinders, the inner flange on the spindle is pressed against grinding disc and outer flange by means of spring force, the clamping force of the press-on spring being able to be removed by means of a lever, while simultaneously unlocking the protective hood and fixing the spindle.

Description

Die Erfindung betrifft eine Werkzeug-Spannvorrichtung für Winkelschleifer nach dem Oberbegriff des Anspruchs 1.The invention relates to a tool clamping device for angle grinders according to the preamble of claim 1.

Um bei bekannten Winkelschleifern die Schleifscheibe (5) wechseln, sowie die Schutzhaube verstellen zu können, be­ darf es eines oder zweier Hilfswerkzeuge. Es sind auch Spannsysteme bekannt, bei welchen keine Zuhilfenahme von Hilfswerkzeugen nötig ist, jedoch bieten diese nicht den Vorteil, aus den erfindungsgemäßen Ansprüchen 2 und 3 und unterscheiden sich in Aufbau, Funktion und Handhabung von vorliegender Erfindung.In order to change the grinding wheel ( 5 ) of known angle grinders and to be able to adjust the protective hood, one or two auxiliary tools may be required. Clamping systems are also known which do not require the use of auxiliary tools, but they do not offer the advantage from claims 2 and 3 according to the invention and differ in structure, function and handling from the present invention.

Bei vorliegender erfindungsgemäßen Vorrichtung ist der dem Getriebe zugewandte Spannflansch (2) auf der Spin­ del (3) verdrehungssicher, jedoch axial verschiebbar angeordnet. Getriebeseitig ist der axiale Hub des Flansches (2) durch eine, auf der Spindel (3) angeordnete Gegenfeder (4) begrenzt, in entgegengesetzter Richtung durch einen Anschlag auf der Spindel (3). Mittels der Druck­ gabel (1) läßt sich der Flansch (2) gegen den Druck der Gegenfeder (4) um den Weg der Spannschraubensteigung (7), bzw. mindestens den Hub der Sperrhakenkränze (21/22) be­ wegen, wodurch die Spannschraube (7) soweit entlastet wird, daß sie ohne Zuhilfenahme von Hilfswerkzeugen gänz­ lich lösbar ist. Der Spannhebel (Spanngabel) (1) kann ge­ mäß Anspruch 2 mit einem Raststift (1/9) versehen sein, welcher in Ruhestellung in entsprechende Rastvertiefung an der drehbar angeordneten Schutzhaube eingreift und diese feststellt. Die Schutzhaube enthält entsprechend ihrer Verstellmöglichkeit mehrere teilkreisförmig ange­ ordnete Rastvertiefungen. In the case of the device according to the invention, the clamping flange ( 2 ) facing the transmission is arranged on the spin del ( 3 ) in a manner secure against rotation, but axially displaceable. On the gearbox side, the axial stroke of the flange ( 2 ) is limited by a counter spring ( 4 ) arranged on the spindle ( 3 ), in the opposite direction by a stop on the spindle ( 3 ). By means of the pressure fork ( 1 ), the flange ( 2 ) can be moved against the pressure of the counter spring ( 4 ) by the distance of the clamping screw pitch ( 7 ), or at least the stroke of the pawl rings ( 21/22 ), whereby the clamping screw ( 7 ) is relieved to the extent that it can be completely solved without the aid of auxiliary tools. The clamping lever (clamping fork) ( 1 ) can be provided according to claim 2 with a locking pin ( 1/9 ) which engages in the rest position in a corresponding locking recess on the rotatable protective hood and detects it. The protective hood contains several recessed recesses arranged in the form of a circle in accordance with their adjustment options.

Durch Niederdrücken des Spannhebels (1) fäßt sich nunBy pressing down the tensioning lever ( 1 ) you can now hold it

  • 1. die Spannvorrichtung der Schleifscheibe entspannen,1. relax the clamping device of the grinding wheel,
  • 2. die Schutzhaubenrastung lösen und2. release the protective catch and
  • 3. die Schleif­ spindel in Gegen-Betriebsrichtung festsetzen.3. the grinding Lock the spindle in the opposite operating direction.

Zu berücksichtigen ist Folgendes:The following should be considered:

  • 1. Gegenspannung zum Schiebeflansch (Innenflansch) (2) kann durch Mutter (7) oder Schraube (7) erfolgen. Es muß jedoch auf bekannte Weise sichergestellt sein, daß Innen- und Außenflansch sich nicht gegeneinander ver­ drehen lassen, um auszuschließen, daß z. B. bei extremen Lastmoment an der Schleifscheibe, der Außenflansch von der Schleifscheibe derart fest gegen den Innenflansch geschraubt wird, daß der Spannhub der Feder (4) dadurch aufgehoben wird.1. Counter-tension to the sliding flange (inner flange) ( 2 ) can be done by nut ( 7 ) or screw ( 7 ). However, it must be ensured in a known manner that the inner and outer flange can not be rotated against each other to rule out that z. B. at extreme load torque on the grinding wheel, the outer flange of the grinding wheel is screwed so tightly against the inner flange that the clamping stroke of the spring ( 4 ) is thereby canceled.
  • 2. Die Schutzhaube ist drehbar in einer Nut am Hals der Lagerplatte aufgenommen und gegen zufälliges verdrehen, bei gelöster Rastung, z. B. durch einen Expanderring ge­ sichert.2. The protective hood is rotatable in a groove on the neck of the Bearing plate picked up and twisted against accidental with detent released, e.g. B. ge by an expand ring backs up.
  • 3. Die Sperrhakenkränze sind so ausgebildet, daß sie bei laufender Maschine und gleichzeitig unbeabsichtigter Betätigung des Spannhebels (1) nicht eingreifen, sondern rätschen.3. The pawl rings are designed so that they do not intervene when the machine is running and at the same time unintentionally actuate the tensioning lever ( 1 ), but riddle.
  • 4. Der Spannhebel (1) wird durch Rückstellfeder (8) und Anschlag in Ruhelage gebracht.4. The tensioning lever ( 1 ) is brought into the rest position by the return spring ( 8 ) and stop.

Die Vorteile der Erfindung besehen im wesentlichen in der Funktionsvielfalt des Hebels (1), des verhältnis­ mäßig geringen techn. Aufwandes und der schnellen, be­ quemen und sicheren Handhabung.The advantages of the invention are essentially in the variety of functions of the lever ( 1 ), the relatively moderately low tech. Effort and fast, convenient and safe handling.

Claims (3)

1. Spannvorrichtung zum Spannen der Schleifscheibe, bei einem Hand-Winkelschleifer, ohne Zuhilfenahme von Werkzeugen, wobei sich durch eine einzige Hebelbe­ wegung die Spannvorrichtung der Schleifscheibe lösen läßt, sich eine Funktionserweiterung dahingehend an­ bietet, daß sich mittels gleicher Hebelbewegung die Rastung der Schutzhaube lösen, sowie die Schleif­ spindel festsetzen läßt, dadurch gekennzeichnet, daß der innere Spannflansch (2) als axial verschiebbares Element verdrehungsfest auf der Schleifspindel (3) aufgenommen ist und sich mittels einer Ausrückgabel (1), welche in die Ausrücknut (21) des inneren Spann­ flansches eingreift - die Ausrücknut (21) kann auch durch einen ringförmigen Absatz ersetzt werden -, gegen den Druck einer Spannfeder (4) in Gegenrichtung der Schleifscheibe (5) schieben läßt, wodurch die Spannkraft der Feder (4) aufgehoben wird und sich die Spannvorrichtung des Weiteren wie bekannt ohne Werkzeug gänzlich lösen läßt. 1. Clamping device for clamping the grinding wheel, with a hand-held angle grinder, without the use of tools, whereby the clamping device of the grinding wheel can be released by a single lever movement, a functional extension can be offered in such a way that the latching of the protective cover can be released by means of the same lever movement , as well as the grinding spindle, characterized in that the inner clamping flange ( 2 ) is received as an axially displaceable element in a torsion-proof manner on the grinding spindle ( 3 ) and by means of a disengaging fork ( 1 ) which is inserted into the disengaging groove ( 21 ) of the inner clamping flange engages - the Ausrücknut (21) can also be replaced by an annular shoulder -, can be against the pressure of a tension spring (4) in the opposite direction of the grinding wheel slide (5), whereby the biasing force of the spring (4) is canceled and the clamping device furthermore, as is known, can be completely solved without tools. 2. Spannvorrichtung nach Anspruch 1, dadurch gekenn­ zeichnet, daß durch den erfindungsgemäßen Spann­ hebel (Spanngabel) (1), mit dem Lösen der Spannvor­ richtung die Rastung (1/9) der Schutzhaube (9) ge­ löst wird, wonach sich diese in die gewünschte Position bringen läßt.2. Clamping device according to claim 1, characterized in that by the inventive clamping lever (clamping fork) ( 1 ), with the release of the Spannvor direction, the detent ( 1/9 ) of the protective hood ( 9 ) is released, after which this in can bring the desired position. 3. Spannvorrichtung nach Anspruch 1, dadurch gekenn­ zeichnet, daß durch den erfindungsgemäßen Spann­ hebel (Spanngabel) (1) mit dem Lösen der Spannvor­ richtung der Schiebeflansch (2) mit seinem Sperr­ hakenkranz (22) in einen komplementär feststehenden Sperrhakenkranz (61) der Lagerplatte (6) einrastet, so daß die Schleifspindel (3) für den, dem betriebs­ mäßig entgegengesetzten Drehsinn, festgesetzt wird.3. Clamping device according to claim 1, characterized in that by the clamping lever according to the invention (clamping fork) ( 1 ) with the release of the Spannvor direction of the sliding flange ( 2 ) with its locking hook ring ( 22 ) in a complementarily fixed locking hook ring ( 61 ) Bearing plate ( 6 ) engages, so that the grinding spindle ( 3 ) for the, the operationally opposite direction of rotation, is fixed.
DE19873742430 1987-12-15 1987-12-15 Tool-clamping device for hand-held angle grinding machine (angle grinder) Withdrawn DE3742430A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873742430 DE3742430A1 (en) 1987-12-15 1987-12-15 Tool-clamping device for hand-held angle grinding machine (angle grinder)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873742430 DE3742430A1 (en) 1987-12-15 1987-12-15 Tool-clamping device for hand-held angle grinding machine (angle grinder)

Publications (1)

Publication Number Publication Date
DE3742430A1 true DE3742430A1 (en) 1989-06-29

Family

ID=6342620

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873742430 Withdrawn DE3742430A1 (en) 1987-12-15 1987-12-15 Tool-clamping device for hand-held angle grinding machine (angle grinder)

Country Status (1)

Country Link
DE (1) DE3742430A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19914855B4 (en) * 1999-04-01 2004-04-22 Metabowerke Gmbh Hand grinder with a protective hood that can be adjusted in the circumferential direction
WO2004087377A1 (en) * 2003-03-31 2004-10-14 Atlas Copco Tools Ab Power grinder with safety guard and spindle arresting means
WO2007144219A1 (en) * 2006-06-14 2007-12-21 Robert Bosch Gmbh Protective hood fastening device
WO2008058900A1 (en) * 2006-11-13 2008-05-22 Robert Bosch Gmbh Protective hood anti-rotation lock
CN101535001B (en) * 2006-11-13 2011-04-13 罗伯特·博世有限公司 Portable power tool for a rotating tool comprising a protective hood
DE102010044613A1 (en) * 2010-09-01 2012-03-01 C. & E. Fein Gmbh sharpener
WO2012089639A1 (en) * 2010-12-30 2012-07-05 Robert Bosch Gmbh Hand-held power tool clamping device
DE102012007927A1 (en) * 2012-04-17 2013-10-17 C. & E. Fein Gmbh Hand tool with a clamping device
CN103753363A (en) * 2013-12-18 2014-04-30 格林策巴赫机械(上海)有限公司 Flexible self-adaptive mechanism of angle grinder
US11806857B2 (en) 2020-08-28 2023-11-07 Black & Decker, Inc. Airflow intake configuration in power tool

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19914855B4 (en) * 1999-04-01 2004-04-22 Metabowerke Gmbh Hand grinder with a protective hood that can be adjusted in the circumferential direction
WO2004087377A1 (en) * 2003-03-31 2004-10-14 Atlas Copco Tools Ab Power grinder with safety guard and spindle arresting means
WO2007144219A1 (en) * 2006-06-14 2007-12-21 Robert Bosch Gmbh Protective hood fastening device
CN101466497B (en) * 2006-06-14 2012-07-04 罗伯特·博世有限公司 Protective hood fastening device, protective hood and angle grinder
US8282446B2 (en) 2006-06-14 2012-10-09 Robert Bosch Gmbh Guard attachment device
RU2464150C2 (en) * 2006-11-13 2012-10-20 Роберт Бош Гмбх Device for locking protective casing
WO2008058900A1 (en) * 2006-11-13 2008-05-22 Robert Bosch Gmbh Protective hood anti-rotation lock
CN101535001B (en) * 2006-11-13 2011-04-13 罗伯特·博世有限公司 Portable power tool for a rotating tool comprising a protective hood
US8562395B2 (en) 2006-11-13 2013-10-22 Robert Bosch Gmbh Guard anti-rotation lock
US8465348B2 (en) 2006-11-13 2013-06-18 Robert Bosch Gmbh Guard anti-rotation lock
DE102010044613A1 (en) * 2010-09-01 2012-03-01 C. & E. Fein Gmbh sharpener
CN102380812A (en) * 2010-09-01 2012-03-21 C.&E.泛音有限公司 Grinding device
US8961272B2 (en) 2010-09-01 2015-02-24 C. & E. Fein Gmbh Grinding device with protective hood
CN102380812B (en) * 2010-09-01 2015-09-16 C.E.泛音有限公司 Grinder
EP2425927B1 (en) * 2010-09-01 2017-10-25 C. & E. Fein GmbH Grinding device
WO2012089639A1 (en) * 2010-12-30 2012-07-05 Robert Bosch Gmbh Hand-held power tool clamping device
DE102012007927A1 (en) * 2012-04-17 2013-10-17 C. & E. Fein Gmbh Hand tool with a clamping device
US9339904B2 (en) 2012-04-17 2016-05-17 C. & E. Fein Gmbh Power tool with a clamping mechanism for clamping a tool
DE102012007927B4 (en) 2012-04-17 2022-04-21 C. & E. Fein Gmbh Hand tool with a clamping device
CN103753363A (en) * 2013-12-18 2014-04-30 格林策巴赫机械(上海)有限公司 Flexible self-adaptive mechanism of angle grinder
CN103753363B (en) * 2013-12-18 2016-03-23 格林策巴赫机械(上海)有限公司 The flexible adaptive mechanism of angle grinding machine
US11806857B2 (en) 2020-08-28 2023-11-07 Black & Decker, Inc. Airflow intake configuration in power tool

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