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WO2005095992A1 - Capteur de vitesse - Google Patents

Capteur de vitesse Download PDF

Info

Publication number
WO2005095992A1
WO2005095992A1 PCT/EP2005/051070 EP2005051070W WO2005095992A1 WO 2005095992 A1 WO2005095992 A1 WO 2005095992A1 EP 2005051070 W EP2005051070 W EP 2005051070W WO 2005095992 A1 WO2005095992 A1 WO 2005095992A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
carrier
speed sensor
plastic
coil
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.)
Ceased
Application number
PCT/EP2005/051070
Other languages
German (de)
English (en)
Inventor
Harry Skarpil
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2005095992A1 publication Critical patent/WO2005095992A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/026—Housings for speed measuring devices, e.g. pulse generator

Definitions

  • the invention relates to a speed sensor with a pot-like housing made of plastic, which has a cylindrical or step-cylindrical cup opening, into which a carrier made of plastic is inserted, which carries a coil, the winding ends of which are conductively connected to plug contacts, or carries an electrical circuit with electrical components and a sensor element, which is conductively connected to plug contacts, the plug contacts projecting axially to the pot opening into a pot-like plug receptacle also axially aligned thereto, and a mating plug can be inserted into the plug receptacle in a contacting manner.
  • the object of the invention is therefore to provide a speed sensor of the type mentioned which, with a simple structure, is to a large extent sealed against the ingress of moisture.
  • the housing consists of a plastic that is transparent to laser radiation and the carrier consists of a plastic that is not transparent for the laser radiation, that the plastic of the housing is identical to the plastic of the carrier, and that both plastics have approximately the same melting point and that the carrier in the area of the plug receptacle is connected to the housing radially by means of a diode laser is welded, the housing protruding sleeve-like axially beyond the connector receptacle-side end of the carrier and forming a step of larger cross-section of the connector receptacle into which the mating connector with its radially circumferential outer surface can be inserted adjacent to the radially circumferential inner wall of the large step with radial prestress.
  • This design enables a serial two-stage sealing of the inside of the housing to the outside without additional components such as seals.
  • the mating connector lies with its radially circumferential outer surface close to the radially circumferential inner wall of the sleeve-like housing.
  • This seal is usually sufficient to seal the interior of the housing from the outside. Should e.g. if this seal is not perfect, the second stage of the seal prevents moisture penetration, this second stage being carried out by welding the carrier to the inside of the housing. This second stage of sealing provides a seal even when the mating connector is removed.
  • the carrier can be inserted into the pot opening up to axial contact with the bottom of the pot opening of the housing.
  • the carrier is an injection molded part, into which the plug contacts designed as sheet metal parts are injected.
  • the sheet metal parts can be any suitable material.
  • the sheet metal parts can be any suitable material.
  • the speed sensor can be an inductive speed sensor, the support being a coil support on which the coil and a permanent magnet and a bolt made of an electrically conductive material and projecting through a coaxial opening of the coil are arranged.
  • a Hall chip which forms the sensor element, can also be arranged on the carrier.
  • the inductive speed sensor shown in the figure has a pot-like housing 1 made of a plastic that is transparent to laser radiation and has a cylindrical pot opening 2.
  • the housing 1 On a part of its cylindrical outer contour, the housing 1 is provided with an external thread 3, with which it can be screwed into a threaded bore of a holding part, not shown, until a flange 4 of the housing 1 abuts on the holding part.
  • a radially circumferential groove 5 is formed on the housing, into which a sealing ring 6 is inserted, which can be clamped between the flange 4 and the holding part.
  • a hexagon 7 formed on the outer contour of the housing 1, on which a tool for screwing in the speed encoder into the threaded bore of the holding part.
  • the speed sensor is an inductive speed sensor with a coil holder 9 that can be inserted into the pot opening 2 up to axial contact with the bottom 8 of the pot opening 2.
  • the coil holder 9 consists of a plastic that is similar to the plastic of the housing 1 and also has an approximately identical melting point.
  • the plastic of the coil carrier 9 is not transparent to the laser radiation.
  • the coil carrier 9 has a radially circumferential, outwardly open receptacle 10, in which a coil 11 is arranged.
  • An opening 12 is formed coaxially in the area of the coil 11 in the coil carrier 9, in which an bolt 13 made of an electrically conductive material is arranged. With its one end, the bolt 13 lies against the bottom 8 of the housing 1.
  • the bolt 13 With its other end region, the bolt 13 is axially in contact with a permanent magnet 15 inserted in a chamber 14 of the coil carrier 9.
  • Plug contacts 16 projecting into a pot-shaped receptacle 18 on the end of the coil carrier 9 facing away from the base 8.
  • the other ends are formed to form conductor tracks 17 close to the coil 11 and are connected to the winding ends of the coil 11, not shown.
  • the housing 1 and the coil carrier 9 have a radially circumferential weld 20, which is carried out by means of a diode laser. Due to the transparency of the plastic of the housing 1, the diode laser penetrates the housing 1 and then melts the non-transparent plastic of the coil carrier 9 that absorbs the diode laser.
  • the housing plastic also plasticizes in the area of the melted coil carrier plastic by means of heat conduction and leads to its fusion.
  • the housing 1 protrudes like a sleeve beyond the end of the coil carrier 9 at its mouth-side end region and forms a step 21 with a larger cross section of the plug receptacle 18.
  • a mating connector (not shown) can be inserted in such a way that it contacts the plug contacts 16 on the one hand and, on the other hand, with its radially circumferential circumferential surface on the radially circumferential inner wall 22 of the large steps 21 sealingly with radial prestress.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

L'invention concerne un capteur de vitesse comportant un boîtier (1) en plastique en forme de pot, doté d'une ouverture (2) cylindrique, dans laquelle est introduit un support (9) en plastique. Dans ce support (9) est logée une bobine (11) dont l'extrémité des enroulements est reliée de manière conductrice à des contacts de connexion (16). Une fiche antagoniste est introduite dans un logement de connexion (18) en forme de pot en se mettant en prise avec les contacts de connexion (16). Le boîtier (1) est en plastique transparent au rayonnement laser alors que le support (9) est en plastique non transparent au rayonnement laser. Le support est soudé au boîtier (1) par laser à diode de manière circulaire radiale dans la zone du logement de connexion. Le boîtier (1) est en saillie en forme de douille, dans l'axe, au-dessus de l'extrémité du support (9) côté logement de connexion, formant ainsi un niveau (21) de diamètre supérieur au logement de connexion (18), dans lequel la fiche antagoniste est introduite, sa surface latérale circulaire radiale appuyant avec précontrainte radiale contre la paroi interne (22) circulaire radiale du niveau (21) de grande dimension.
PCT/EP2005/051070 2004-04-02 2005-03-10 Capteur de vitesse Ceased WO2005095992A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410016430 DE102004016430B3 (de) 2004-04-02 2004-04-02 Drehzahlgeber
DE102004016430.4 2004-04-02

Publications (1)

Publication Number Publication Date
WO2005095992A1 true WO2005095992A1 (fr) 2005-10-13

Family

ID=34813726

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/051070 Ceased WO2005095992A1 (fr) 2004-04-02 2005-03-10 Capteur de vitesse

Country Status (2)

Country Link
DE (1) DE102004016430B3 (fr)
WO (1) WO2005095992A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013020385A1 (de) 2012-12-28 2014-07-03 Crm-System Gmbh Umdrehungszähler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018000221A1 (de) 2018-01-12 2019-07-18 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Geschwindigkeitssensor mit isolierenden inneren und äußeren Ausnehmungen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5764057A (en) * 1996-06-24 1998-06-09 Trw Inc. Sensor unit with shell structure having a detent structure
DE19947437A1 (de) * 1999-10-02 2001-04-05 Valeo Schalter & Sensoren Gmbh Sensor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207777A1 (de) * 2002-02-23 2003-09-11 A B Elektronik Gmbh Laserverschweißte Sensorgehäuse

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5764057A (en) * 1996-06-24 1998-06-09 Trw Inc. Sensor unit with shell structure having a detent structure
DE19947437A1 (de) * 1999-10-02 2001-04-05 Valeo Schalter & Sensoren Gmbh Sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013020385A1 (de) 2012-12-28 2014-07-03 Crm-System Gmbh Umdrehungszähler

Also Published As

Publication number Publication date
DE102004016430B3 (de) 2005-09-01

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