EP0882510A1 - Schraube mit Magnet - Google Patents
Schraube mit Magnet Download PDFInfo
- Publication number
- EP0882510A1 EP0882510A1 EP98810415A EP98810415A EP0882510A1 EP 0882510 A1 EP0882510 A1 EP 0882510A1 EP 98810415 A EP98810415 A EP 98810415A EP 98810415 A EP98810415 A EP 98810415A EP 0882510 A1 EP0882510 A1 EP 0882510A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recess
- magnet
- screw
- shaft part
- free end
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/286—Magnetic plugs and dipsticks disposed at the inner circumference of a recipient, e.g. magnetic drain bolt
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
- F01M2001/1028—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the type of purification
- F01M2001/1042—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the type of purification comprising magnetic parts
Definitions
- the invention relates to a screw with a magnet for hand-held tool devices according to the preamble of claim 1.
- Hand-held tool devices such as chisels have a gear and a percussion. Both the gearbox and the striking mechanism show mechanically interacting, metallic components. When interacting despite lubrication, these components are subject to metallic abrasion, which is reflected in the Components lubricating lubricant distributed over the lubricant to ball bearings and Toothings arrives and there is excessive wear and tear premature damage to the ball bearings and the gears.
- From US-PS 4 810 148 is a device for collecting metallic, in the Known abrasion gear housing known from a screw with a Magnet exists and can be inserted into the gear housing.
- the screw points Head part and a shaft part, the head part radially projecting beyond the shaft part and the Shaft part is provided with an external thread and with a recess for free end of the shaft part is open.
- the turning drive of the screw serve rotary driving surfaces on the outer contour of the head part in the form of an external hexagon, on which a corresponding screwing tool can be attached.
- This known screw has the disadvantage that when removing the screw Magnet can hit the side of the external thread. Part of the scope of the Magnet abrasion accumulated on the thread of the Stripped gearbox housing and is deposited there. In the following The screwing in of the screw can be caused by the metal abrasion deposited on the thread damage to the threaded connection between the screw and the Gearbox cause or cause a leak in the area Lead threaded connection.
- Another disadvantage is the large axial length of the Magnet that extends beyond the free end of the screw. So that together with the Screw inserted into the gearbox magnet with moving parts of the Gearbox cannot collide, the gearbox must have an additional one Have recording area that leads to a large size of the gear housing leads.
- the invention has for its object to a screw with a magnet create where a large amount of metal debris can accumulate without metal abrasion is deposited on the external thread and one with moving parts Machine tool cannot collide.
- a screw with a magnet which is characteristic of the Section of claim 1 features listed.
- the axially measured strength of the magnet is essentially that of the free end of the shaft part from the measured depth of the recess corresponds to the magnet can be used in the screw such that a surface of the magnet and the free End of the shaft portion of the screw are substantially in the same plane.
- the screw surrounds the circumference of the magnet, metal abrasion can only occur on the Collect the end face of the magnet pointing in the direction of rotation.
- the axial strength of the magnet and the corresponding one The depth of the recess can be very small. The ratio is expediently between the depth of the recess and the outer diameter of the shaft part 0.1: 1 to 0.2: 1.
- a form-fitting fixing of the magnet in the recess is preferred achieved by tapering the recess towards the free end of the shaft part and encompasses the circumferential area of the magnet at least partially.
- the screw according to the invention is to be disposed of, it is necessary to separate the magnet from the screw.
- To do this separation process with simple To be able to accomplish means is preferably in the peripheral area Recess at least one extension arranged, the recess radially protrudes and is open towards the free end of the shaft part.
- a screwdriver can be used, the Swiveling on the one hand on a surface facing the free shaft part of the Screw supports, on the other hand engages on the side of the magnet and the magnet out the recess.
- the magnet can be a radial depression, for example have, in which the tip of the screwdriver can engage positively. It is it is also possible to design the recess axially so deep that it can reach behind of the magnet is made possible by the screwdriver.
- the magnet arranged in the recess when pressed out with the Tilting screwdriver and jamming it are advantageous that several extensions evenly distributed in the peripheral area of the recess arranged. In this way it is possible to use two magnets, for example to press opposing screwdrivers out of the recess.
- the screw is advantageously made of plastic.
- the one made of plastic Screw is light and leads to a smaller one Total weight of the machine tool.
- the magnet is advantageously extrusion-coated with plastic.
- the screw 1 shown in FIGS. 1 and 2 has a magnet 4 and is exposed a head part 2 and a shaft part 3 together.
- the head part 2 has a round Outside contour with the diameter D and surpasses that of an outside thread 31 formed outer contour of the shaft part 3 of the screw 1 radially.
- the axial height H the head part 2 corresponds essentially to a third of the total length L of Screw 1.
- the screw 1 has a plurality of depressions 21, 22 on the end face 23 of the head part 2 in which a screwing tool, not shown, can engage.
- the depressions 21, 22 are open towards the front side 23 of the head part 2 and extend up to the area of the shaft part 3.
- the depression 22 is arranged in the center of the screw 1 and is designed in the form of a hexagon socket. This central depression 22nd extends in the axial direction over substantially half the total length L of Screw 1.
- the two, diametrically opposite recesses 21 are as Blind holes formed.
- the shaft part 3 has a recess 32 which leads to the free end of the shaft part 3 is open towards.
- the axial depth T of the recess 32 essentially corresponds one third of the total length L of the screw 1.
- the ratio between the Depth T of the recess 32 and the outer diameter of the shaft part 3 is 0.1: 1 to 0.2: 1.
- the magnet 4 the outer diameter of which is essentially fixed, is fastened in the recess 32 corresponds to the inner diameter of the recess 32.
- the magnet 4 tapers is stepped in the direction of rotation and lies with its step-like taper adjoining end face 41 in one plane with the free end of the shaft part 3 Shaft part 3 tapers towards its free end.
- the recess 32 tapers in the direction of insertion and engages behind with a tapered one Section the step-like tapered area of the magnet 4, so that the magnet 4th is held positively in the screw 1.
- extensions 33 are arranged in the peripheral region of the mouth of the recess 32, which are arranged evenly distributed over the circumference of the recess 32.
- the extensions 33 extend partially along the circumference of the recess 32 and protrude beyond the recess 32 in the radial direction to the outside. For free At the end of the shaft part 3, the extensions 33 are open.
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
- Fig. 1
- eine erfindungsgemässe Schraube mit einem Magnet in geschnittener Darstellung;
- Fig. 2
- eine Draufsicht auf die Schraube gemäss Fig. 1.
Claims (7)
- Schraube mit Magnet (4) zum Eindrehen in ein Schmiermittel enthaltendes Gehäuse von handgeführten Werkzeuggeräten, mit einem ein Aussengewinde (31) aufweisendes Schaftteil (3), einem das Schaftteil (3) radial überragenden Kopfteil (2), Drehmitnahmeflächen am Kopfteil (2) und einer der formschlüssigen Festlegung des Magneten (4) dienenden, offen ausgebildeten Ausnehmung (32) im Schaftteil (3), dadurch gekennzeichnet, dass die vom freien Ende des Schaftteiles (3) aus gemessene Tiefe (T) der Ausnehmung (32) im wesentlichen der axial gemessenen Stärke des Magneten (4) entspricht.
- Schraube nach Anspruch 1, dadurch gekennzeichnet, dass das Verhältnis zwischen der Tiefe (T) der Ausnehmung (4) und dem Aussendurchmesser des Schaftteiles (3) 0,1:1 bis 0,2:1 beträgt.
- Schraube nach Anspruch 1 oder 2, dadurch gekennzeichnet dass sich die Ausnehmung (32) zum freien Ende des Schaftteiles (3) hin verjüngt.
- Schraube nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass im Umfangsbereich der Ausnehmung (32) wenigstens eine Erweiterung (33) angeordnet ist, die die Ausnehmung (32) radial überragt und zum freien Ende des Schaftteiles (3) hin offen ausgebildet ist.
- Schraube nach Anspruch 4, dadurch gekennzeichnet, dass im Umfangsbereich der Ausnehmung (32) mehrere Erweiterungen (33) gleichmässig verteilt angeordnet sind.
- Schraube nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Schraube (1) aus Kunststoff ausgebildet ist.
- Schraube nach Anspruch 6, dadurch gekennzeichnet, dass der Magnet (4) teilweise mit Kunststoff umspritzt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19724134A DE19724134A1 (de) | 1997-06-07 | 1997-06-07 | Schraube mit Magnet |
DE19724134 | 1997-06-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0882510A1 true EP0882510A1 (de) | 1998-12-09 |
EP0882510B1 EP0882510B1 (de) | 2002-08-07 |
Family
ID=7831837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98810415A Expired - Lifetime EP0882510B1 (de) | 1997-06-07 | 1998-05-07 | Schraube mit Magnet |
Country Status (4)
Country | Link |
---|---|
US (1) | US6078238A (de) |
EP (1) | EP0882510B1 (de) |
JP (1) | JPH116510A (de) |
DE (2) | DE19724134A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1909022A3 (de) * | 2006-10-06 | 2008-05-14 | Zf Friedrichshafen Ag | Anordnung eines Magnetstopfens oder Spänewarngebers für ein Getriebe oder eine Maschine |
DE102012107147A1 (de) | 2012-08-03 | 2014-02-20 | Karl Storz Gmbh & Co. Kg | Medizinisches Werkzeug |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040197161A1 (en) * | 2003-04-04 | 2004-10-07 | Gonzalez Luis A. | Metric/standard magnetic motor oil plug |
US7413026B2 (en) | 2006-07-01 | 2008-08-19 | Black & Decker Inc. | Lubricant system for powered hammer |
US7726413B2 (en) | 2006-07-01 | 2010-06-01 | Black & Decker Inc. | Tool holder for a powered hammer |
EP1872910B1 (de) | 2006-07-01 | 2012-11-21 | Black & Decker, Inc. | Verfahren zum Bemessen die Abnutzung eines nasenartigen Teils eines Döppers in einem Bohrhammer |
US20080006419A1 (en) * | 2006-07-01 | 2008-01-10 | Black & Decker Inc. | Tool holder connector for powered hammer |
US7401661B2 (en) | 2006-07-01 | 2008-07-22 | Black & Decker Inc. | Lubricant pump for powered hammer |
ATE482031T1 (de) * | 2006-07-01 | 2010-10-15 | Black & Decker Inc | Abbruchhammer |
US8186921B2 (en) * | 2006-12-08 | 2012-05-29 | General Plug & Manufacturing Company | Drain plug |
US9255501B2 (en) | 2011-08-03 | 2016-02-09 | Peter Esposito | Threadless magnetic oil drain plug |
US20140183148A1 (en) * | 2012-12-28 | 2014-07-03 | Allure Home Creation Co., Inc. | Magnetic Cookware Stands |
EP2840355A1 (de) * | 2013-08-21 | 2015-02-25 | HILTI Aktiengesellschaft | Lasergerät und Haltevorrichtung zur Befestigung eines Lasergerätes an einem Halteelement |
JP6120441B2 (ja) * | 2013-08-29 | 2017-04-26 | 本田技研工業株式会社 | オイルドレンプラグ |
US9957859B2 (en) | 2016-07-08 | 2018-05-01 | Ronald Cohen | Magnetic drain plug |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2242830A (en) * | 1939-01-16 | 1941-05-20 | Lisle Corp | Magnetic plug |
US4763092A (en) * | 1987-04-10 | 1988-08-09 | Kazuyuki Tomita | Magnetic filter |
US4810148A (en) | 1987-04-09 | 1989-03-07 | Ishikawa Tekko Kabushiki Kaisha | Drain bolt |
WO1997010467A1 (fr) * | 1995-09-13 | 1997-03-20 | Xu, Qionglin | Dispositif de securite pour des boites de vitesses ou des cuves d'huile |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0143573Y2 (de) * | 1987-09-11 | 1989-12-18 |
-
1997
- 1997-06-07 DE DE19724134A patent/DE19724134A1/de not_active Withdrawn
-
1998
- 1998-05-07 EP EP98810415A patent/EP0882510B1/de not_active Expired - Lifetime
- 1998-05-07 DE DE59805062T patent/DE59805062D1/de not_active Expired - Lifetime
- 1998-05-26 US US09/084,860 patent/US6078238A/en not_active Expired - Lifetime
- 1998-06-03 JP JP10154506A patent/JPH116510A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2242830A (en) * | 1939-01-16 | 1941-05-20 | Lisle Corp | Magnetic plug |
US4810148A (en) | 1987-04-09 | 1989-03-07 | Ishikawa Tekko Kabushiki Kaisha | Drain bolt |
US4763092A (en) * | 1987-04-10 | 1988-08-09 | Kazuyuki Tomita | Magnetic filter |
WO1997010467A1 (fr) * | 1995-09-13 | 1997-03-20 | Xu, Qionglin | Dispositif de securite pour des boites de vitesses ou des cuves d'huile |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1909022A3 (de) * | 2006-10-06 | 2008-05-14 | Zf Friedrichshafen Ag | Anordnung eines Magnetstopfens oder Spänewarngebers für ein Getriebe oder eine Maschine |
DE102012107147A1 (de) | 2012-08-03 | 2014-02-20 | Karl Storz Gmbh & Co. Kg | Medizinisches Werkzeug |
US8821411B2 (en) | 2012-08-03 | 2014-09-02 | Karl Storz Gmbh & Co. Kg | Medical tool |
Also Published As
Publication number | Publication date |
---|---|
EP0882510B1 (de) | 2002-08-07 |
DE59805062D1 (de) | 2002-09-12 |
DE19724134A1 (de) | 1998-12-10 |
US6078238A (en) | 2000-06-20 |
JPH116510A (ja) | 1999-01-12 |
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