DE29917867U1 - Centering drill holder for hollow drills - Google Patents
Centering drill holder for hollow drillsInfo
- Publication number
- DE29917867U1 DE29917867U1 DE29917867U DE29917867U DE29917867U1 DE 29917867 U1 DE29917867 U1 DE 29917867U1 DE 29917867 U DE29917867 U DE 29917867U DE 29917867 U DE29917867 U DE 29917867U DE 29917867 U1 DE29917867 U1 DE 29917867U1
- Authority
- DE
- Germany
- Prior art keywords
- drill
- drill holder
- centering drill
- holder
- hollow
- 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.)
- Expired - Lifetime
Links
- 238000005553 drilling Methods 0.000 claims description 10
- 239000004567 concrete Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 239000011455 calcium-silicate brick Substances 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
- B23B51/0473—Details about the connection between the driven shaft and the tubular cutting part; Arbors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
- B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
Zentrierbohrhalter fur Hohlbohrer BeschreibungCenter drill holder for hollow drills Description
Die Erfindung betrifft einen Zentrierbohrhalter für Hohlbohrer gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a centering drill holder for hollow drills according to the preamble of claim 1.
Für das Bohren relativ großer Löcher in Mauerwerk oder Beton, beispielsweise für das Einsetzen einer Schalter-oder Abzweigdose einer elektrischen Installation, sind Hohlbohrer bekannt, die von einer Handbohrmaschine betrieben werden. Um einen Hohlbohrer auf eine gewünschte Stelle zentrieren zu können, benutzt man zu Beginn einer Bohrung vorübergehend einen Zentrierbohrer. Bekannt sind Zentrier-Bohrer die in der Hohlbohreraufnahme zentrisch eingesetzt werden und mit einer mechanischen Verriegelung oder einer Feststellschraube gehalten werden. Bei den bekannten Systemen steht der Zentrierbohrer immer in gleicher Länge aus dem Hohlbohrer hervor, was beim Anbohrer von unterschiedlichen Materialien Probleme mit sich bringt. Auch ist das schnelle Entfernen des Zentrierbohrers nach dem er seine Aufgabe des Anbohrens erfüllt hat nicht immer gewährleistet.Hollow drills that are operated by a hand drill are known for drilling relatively large holes in masonry or concrete, for example for inserting a switch or junction box in an electrical installation. In order to be able to center a hollow drill on a desired location, a center drill is temporarily used at the beginning of a drilling. Center drills are known which are inserted centrally in the hollow drill holder and are held in place with a mechanical lock or a locking screw. In the known systems, the center drill always protrudes the same length from the hollow drill, which causes problems when drilling into different materials. It is also not always guaranteed that the center drill can be removed quickly after it has fulfilled its task of drilling.
Der Erfindung liegt die Aufgabe zugrunde daß der Zentrierbohrer je nach Mauerwerksbeschaffenheit unterschiedlich weit aus dem Hohlbohrer herausragt. So wird der Zentrierbohrer bei hartem Mauerwerk wie sie sich mit Kalksandsteinen, Bims, Ziegel oder Beton ergeben ganz minimal ca. 5-10 mm aus dem Hohlbohrer hervorragen und bei weichem Putz oder Porenbetonmauerwerk ca. 20-30 mm aus dem Hohlbohrer hervorstehen. Mit dieser Maßnahme wird gewährleistet, daß das Anbohrer beim harten Mauerwerk nicht zu lange dauert und bei weichem Mauerwerk der Zentrierbohrer dem Hohlbohrer ausreichend Halt bietet.The invention is based on the object that the centering drill protrudes from the hollow drill by different distances depending on the masonry quality. For example, in hard masonry such as that created by sand-lime bricks, pumice, bricks or concrete, the centering drill will protrude from the hollow drill by a minimal 5-10 mm, and in soft plaster or aerated concrete masonry it will protrude by 20-30 mm. This measure ensures that the drilling does not take too long in hard masonry and that the centering drill provides sufficient support for the hollow drill in soft masonry.
Eine weitere Aufgabe der Erfindung ist das schnelle Entnehmen des Zentrierbohrens aus dem Hohlbohrer nach dem Anbohrvorgang. Hierfür sorgt die Mitnehmerverriegelung und das Magnethaltesystem.A further object of the invention is the rapid removal of the centering drill from the hollow drill after the drilling process. This is ensured by the driver lock and the magnetic holding system.
Auf den Zeichnungen sind Ausfuhrungsbeispiele der Erfindung dargestellt.The drawings show embodiments of the invention.
Fig. 1 BohreraufnahmeFig. 1 Drill holder
Fig. 2 HohlbohrerFig. 2 Hollow drill
Fig. 3 Zentrierbohrhalter mit NockenFig. 3 Center drill holder with cam
Fig. 4 Zentrierbohrhalter DraufsichtFig. 4 Center drill holder top view
Fig. 5 Zentrierbohrhalter mit StiftenFig. 5 Center drill holder with pins
Fig. 6 Zentrierbohrhalter DraufsichtFig. 6 Center drill holder top view
Die Bohreraufnahme 1 die mit einer Sechskant oder Gewindeaufnahme 3 je nach der zu verwendenen Antriebsmaschine ausgestattet ist, hat zu Hohlbohreraufnahme das Aufnahmegewinde 4 welches mit einer Nut 5 versehen wird. Der Zentrierbohrer 11 wird in den Zentrierbohrhalter 9 welcher mit vorzugsweise 2 Mitnehmernocken 7 rund oder eckig zum Einrasten in die Nut 5 der Bohreraufnahme oder in Vertiefungen 13 in den Boden 12 des Hohlbohrer 6 ausgebildet ist und mittels einer Feststellschraube 10 fixiert wird.The drill holder 1, which is equipped with a hexagon or threaded holder 3 depending on the drive machine to be used, has the thread 4 for holding the hollow drill, which is provided with a groove 5. The center drill 11 is inserted into the center drill holder 9, which is preferably designed with 2 driving cams 7, round or square, for locking into the groove 5 of the drill holder or in recesses 13 in the base 12 of the hollow drill 6, and is fixed by means of a locking screw 10.
Der Zentrierbohrer 11 mit dem Zentrierbohrhalter 9 wird zum Anbohren in die Zentrierbohrerführung 2 der Bohreraufnahme 1 gesteckt, wobei die Nut 5 und die Mitnehmernocken 7 die Kraftübertragung beim Bohrvorgang gewährleisten.The center drill 11 with the center drill holder 9 is inserted into the center drill guide 2 of the drill holder 1 for drilling, whereby the groove 5 and the driving cams 7 ensure the power transmission during the drilling process.
Um der Zentrierbohrereinheit, Zentrierbohrer 11 mit Zentrierbohrhalter 9 beim Anbohren festen Halt zu geben, ist der Zentrierbohrhalter 9 mit einem oder mehreren Magneten 8 ausgerüstet.In order to give the center drill unit, center drill 11 with center drill holder 9 a firm hold during drilling, the center drill holder 9 is equipped with one or more magnets 8.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29917867U DE29917867U1 (en) | 1999-10-11 | 1999-10-11 | Centering drill holder for hollow drills |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29917867U DE29917867U1 (en) | 1999-10-11 | 1999-10-11 | Centering drill holder for hollow drills |
Publications (1)
Publication Number | Publication Date |
---|---|
DE29917867U1 true DE29917867U1 (en) | 2000-03-02 |
Family
ID=8080099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE29917867U Expired - Lifetime DE29917867U1 (en) | 1999-10-11 | 1999-10-11 | Centering drill holder for hollow drills |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE29917867U1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7488146B2 (en) | 2006-11-16 | 2009-02-10 | Black & Decker Inc. | Large holesaw mandrel assembly |
US7517179B2 (en) | 2006-11-16 | 2009-04-14 | Black & Decker Inc. | Small holesaw mandrel assembly |
US20110255931A1 (en) * | 2010-04-20 | 2011-10-20 | The L.S. Starrett Company | Hole Saw Arbor System |
US8434976B2 (en) | 2009-03-20 | 2013-05-07 | Black & Decker Inc. | Small hole saw mandrel assembly |
-
1999
- 1999-10-11 DE DE29917867U patent/DE29917867U1/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7488146B2 (en) | 2006-11-16 | 2009-02-10 | Black & Decker Inc. | Large holesaw mandrel assembly |
US7517179B2 (en) | 2006-11-16 | 2009-04-14 | Black & Decker Inc. | Small holesaw mandrel assembly |
US8434976B2 (en) | 2009-03-20 | 2013-05-07 | Black & Decker Inc. | Small hole saw mandrel assembly |
US20110255931A1 (en) * | 2010-04-20 | 2011-10-20 | The L.S. Starrett Company | Hole Saw Arbor System |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 20000406 |
|
R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20030407 |
|
R157 | Lapse of ip right after 6 years |
Effective date: 20060503 |