EP0882510B1 - Vis avec un aimant - Google Patents

Vis avec un aimant Download PDF

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Publication number
EP0882510B1
EP0882510B1 EP98810415A EP98810415A EP0882510B1 EP 0882510 B1 EP0882510 B1 EP 0882510B1 EP 98810415 A EP98810415 A EP 98810415A EP 98810415 A EP98810415 A EP 98810415A EP 0882510 B1 EP0882510 B1 EP 0882510B1
Authority
EP
European Patent Office
Prior art keywords
magnet
screw
cutout
shaft section
screw according
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
Application number
EP98810415A
Other languages
German (de)
English (en)
Other versions
EP0882510A1 (fr
Inventor
Peter Gerold
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0882510A1 publication Critical patent/EP0882510A1/fr
Application granted granted Critical
Publication of EP0882510B1 publication Critical patent/EP0882510B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 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)

Claims (7)

  1. Vis avec aimant (4) à visser dans un carter, contenant un lubrifiant, d'outils à guidage manuel, comprenant une partie de tige (3) pourvue d'un filetage extérieur (31), une partie de tête (2) dépassant radialement de la partie de tige (3), des surfaces d'entraínement en rotation sur la partie de tête (2) et, dans la partie de tige (3), un évidement (32) de conception ouverte servant au blocage de l'aimant (4) par complémentarité de formes, caractérisée en ce que la profondeur (T) de l'évidement (32) mesurée à partir de l'extrémité libre de la partie de tige (3) correspond sensiblement à l'épaisseur mesurée axialement de l'aimant (4).
  2. Vis selon la revendication 1, caractérisée en ce que le rapport entre la profondeur (T) de l'évidement (4) et le diamètre extérieur de la partie de tige (3) est de 0,1:1 à 0,2:1.
  3. Vis selon la revendication 1 ou 2, caractérisée en ce que l'évidement (32) se rétrécit vers l'extrémité libre de la partie de tige (3).
  4. Vis selon une des revendications 1 à 3, caractérisée en ce que dans la zone circonférentielle de l'évidement (32) est ménagée au moins une partie élargie (33) qui dépasse radialement de l'évidement (32) et qui est conçue de manière ouverte vers l'extrémité libre de la partie de tige (3).
  5. Vis selon la revendication 4, caractérisée en ce que plusieurs parties élargies (33) sont ménagées selon une répartition uniforme dans la zone circonférentielle de l'évidement (32).
  6. Vis selon une des revendications 1 à 5, caractérisée en ce que la vis (1) est réalisée en matière plastique.
  7. Vis selon la revendication 6, caractérisée en ce que l'aimant (4) est partiellement enrobé de matière plastique.
EP98810415A 1997-06-07 1998-05-07 Vis avec un aimant Expired - Lifetime EP0882510B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19724134 1997-06-07
DE19724134A DE19724134A1 (de) 1997-06-07 1997-06-07 Schraube mit Magnet

Publications (2)

Publication Number Publication Date
EP0882510A1 EP0882510A1 (fr) 1998-12-09
EP0882510B1 true EP0882510B1 (fr) 2002-08-07

Family

ID=7831837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810415A Expired - Lifetime EP0882510B1 (fr) 1997-06-07 1998-05-07 Vis avec un aimant

Country Status (4)

Country Link
US (1) US6078238A (fr)
EP (1) EP0882510B1 (fr)
JP (1) JPH116510A (fr)
DE (2) DE19724134A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7401661B2 (en) 2006-07-01 2008-07-22 Black & Decker Inc. Lubricant pump for powered hammer
US7413026B2 (en) 2006-07-01 2008-08-19 Black & Decker Inc. Lubricant system for powered hammer
US7624815B2 (en) 2006-07-01 2009-12-01 Black & Decker Inc. Powered hammer with vibration dampener
US7726413B2 (en) 2006-07-01 2010-06-01 Black & Decker Inc. Tool holder for a powered hammer
US8590633B2 (en) 2006-07-01 2013-11-26 Black & Decker Inc. Beat piece wear indicator for powered hammer

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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
EP1872909A3 (fr) * 2006-07-01 2010-05-05 Black & Decker, Inc. Système de connexion de support d'outil pour marteau-piqueur
DE102006047767A1 (de) * 2006-10-06 2008-06-05 Zf Friedrichshafen Ag Anordnung eines Magnetstopfens oder Spänewarngebers für ein Getriebe oder eine Maschine
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
DE102012107147A1 (de) 2012-08-03 2014-02-20 Karl Storz Gmbh & Co. Kg Medizinisches Werkzeug
US20140183148A1 (en) * 2012-12-28 2014-07-03 Allure Home Creation Co., Inc. Magnetic Cookware Stands
EP2840355A1 (fr) * 2013-08-21 2015-02-25 HILTI Aktiengesellschaft Appareil laser et dispositif de support pour la fixation d'un appareil laser à un élément de support
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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
JPH0236603Y2 (fr) * 1987-04-10 1990-10-04
JPH0143573Y2 (fr) * 1987-09-11 1989-12-18
AU3469395A (en) * 1995-09-13 1997-04-01 Baihe Mo A safety device for gearboxes or oil tanks

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7401661B2 (en) 2006-07-01 2008-07-22 Black & Decker Inc. Lubricant pump for powered hammer
US7413026B2 (en) 2006-07-01 2008-08-19 Black & Decker Inc. Lubricant system for powered hammer
US7624815B2 (en) 2006-07-01 2009-12-01 Black & Decker Inc. Powered hammer with vibration dampener
US7726413B2 (en) 2006-07-01 2010-06-01 Black & Decker Inc. Tool holder for a powered hammer
US7814986B2 (en) 2006-07-01 2010-10-19 Balck & Decker Inc. Lubricant system for powered hammer
US8590633B2 (en) 2006-07-01 2013-11-26 Black & Decker Inc. Beat piece wear indicator for powered hammer

Also Published As

Publication number Publication date
DE59805062D1 (de) 2002-09-12
JPH116510A (ja) 1999-01-12
DE19724134A1 (de) 1998-12-10
US6078238A (en) 2000-06-20
EP0882510A1 (fr) 1998-12-09

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