EP0453774A2 - Relais magnétique - Google Patents

Relais magnétique Download PDF

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Publication number
EP0453774A2
EP0453774A2 EP91104501A EP91104501A EP0453774A2 EP 0453774 A2 EP0453774 A2 EP 0453774A2 EP 91104501 A EP91104501 A EP 91104501A EP 91104501 A EP91104501 A EP 91104501A EP 0453774 A2 EP0453774 A2 EP 0453774A2
Authority
EP
European Patent Office
Prior art keywords
contact bridge
intermediate wall
magnetic switch
projections
contact link
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Withdrawn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
EP91104501A
Other languages
German (de)
English (en)
Other versions
EP0453774A3 (en
Inventor
Karl-W. Heinle
Otmar Danek
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP0453774A2 publication Critical patent/EP0453774A2/fr
Publication of EP0453774A3 publication Critical patent/EP0453774A3/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles

Definitions

  • the invention relates to a magnetic switch, in particular for controlling an electric starter for internal combustion engines, according to the preamble of patent claim 1.
  • the drive pinion of the starter is usually engaged in the ring gear on the flywheel of the internal combustion engine and, at the same time, the starter motor is connected to the mains voltage or the battery via a movable contact bridge. Due to its rigid connection to the internal combustion engine (via the starter motor), the magnetic switch is exposed to high-frequency vibrations, which in unfavorable cases can lead to malfunctions in the magnetic switch.
  • the object of the invention is to design the generic magnetic switch increasingly resistant to vibration with little effort.
  • the contact bridge can be positively fixed to the housing wall in accordance with the features of claims 2 or 3.
  • the projections formed on the contact bridge or on the housing wall can either encompass the contact bridge on its peripheral surfaces or fix it in cooperation with corresponding recesses. It is particularly advantageous if the projections and / or recesses are conical, so that a play-free fixation is ensured when the contact bridge is placed in its rest position on the housing wall.
  • At least one projection which engages asymmetrically on the contact bridge can also be provided, which in the rest position of the contact bridge in conjunction with its spring preload causes the contact bridge to tilt. This tilting ensures that the contact bridge rests without play within its mounting, as a result of which relative movements are also eliminated.
  • the magnetic switch 10 shown in FIG. 1 for an electric starter 12 for an internal combustion engine, not shown, has a housing 14 with a cover 16.
  • a hollow cylindrical electrical winding 18 is arranged within the housing 14 and surrounds an axially displaceable armature 20.
  • the armature 20 moves the pinion of the electrical starter 12 in a manner not shown, and at the same time actuates an electrical contact bridge 26 via a plunger 24 penetrating an intermediate wall 22 of the housing 14.
  • the armature 20 becomes on the Drawing moved to the left, wherein the pinion, not shown, is engaged in the ring gear of the internal combustion engine and at the same time the two contacts 30, 32 fixed in the cover 16 are bridged via the contact bridge 26. With this bridging, the electrical windings of the starter are also supplied with current and the internal combustion engine is thus turned on.
  • the contact bridge 26 is mounted on the tappet 24 via a bush 34, a helical compression spring 36 prestressing the bush 34 with the contact bridge 26 against a stop disk 38 fixed on the tappet 24.
  • the spring 36 predominates the force of a helical compression spring 28 which is supported in the cover 16 in an annular recess 40 and which, in the rest position of the armature 20 in its position shifted to the right in the drawing, prestresses the contact bridge 26 against the contact surface 42 of the intermediate wall 22. If the magnetic switch is activated, the armature 20 actuates the contact bridge 26 via the plunger 24 initially until it contacts the fixed contacts 30, 32, the helical compression spring 28 being compressed accordingly. When the armature 20 is displaced still further to the left, the helical compression spring 36 is then overpressed, the plunger 24 being able to move relative to the bush 34 with the contact bridge 26.
  • guide walls 44, 46, 48, 50 projecting radially inwards are provided in the cover 16, which prevent the contact bridge 26 from twisting within the cover 16. The interaction with the fixed contacts 30, 32, which are located between the guide walls mentioned, is thus ensured.
  • the contact bridge 26 is provided with projections 52, 54 by bending the outer areas by 90 °, which - as can be seen in particular from FIG. 3 - are conical and interact with recesses 56, 58 in the contact surface 42 of the intermediate wall 22.
  • the recesses 56, 58 formed by bores are also conical, so that when the contact bridge 26 is placed on the intermediate wall 22 via the helical compression spring 28, a play-free, vibration-resistant reception or mounting of the contact bridge 26 is formed.
  • the electric starter 12 with the magnetic switch 10 is exposed to the vibrations excited by the internal combustion engine, which, however, are absorbed by the helical compression spring 28 via the recesses 56, 58 and the projections 52, 54 in conjunction with the preload. Relative movements of the contact bridge 26 within its bearing in the intermediate wall 22 via the bush 34 and within its guide surfaces 44, 46, 48, 50 in the cover 16 and any wear associated therewith are avoided.
  • the intermediate wall 22 'of the magnetic switch 10 is provided on its contact surface 42 with molded projections 60, 62, 64, 66.
  • the projections are arranged such that they enclose the contact bridge 26 ', which is essentially rectangular in plan view, on its peripheral surfaces.
  • the projections 60, 62, 64, 66 are wedge-shaped or conical (cf. FIG. 5) in order to ensure that the contact bridge 26 'lies within the projections 60, 62, 64, 66 without play.
  • the contact bridge 26 ' can be made in the form of a plate without corresponding projections.
  • the contact bridge 26 ′′ is asymmetrically provided at one end with a projection 70 which is located on the contact surface 42 of the intermediate wall 22 ′′ of the magnetic switch 10 supports.
  • the contact bridge 26 ′′ with the plunger 24 and the bush 34 is inclined or tilted within its bearing in such a way that a play-free contact in connection with the prestressing force of the helical compression spring 28 is effected.
  • This tilting or tensioning likewise ensures that the contact bridge 26 ′′ cannot flutter in its rest position when vibrations are excited by the internal combustion engine.
  • the invention is not restricted to the exemplary embodiments shown.
  • the projections or recesses shown can also have other geometrical designs, the decisive factor here is that the contact bridge 26 is correspondingly positively fixed in its rest position or is braced or tilted in its mounting.
  • the projection 70 could also not be formed on the contact bridge 26 ′′ but on the intermediate wall 22 ′′.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP19910104501 1990-04-27 1991-03-22 Solenoid actuator Withdrawn EP0453774A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904013534 DE4013534C1 (fr) 1990-04-27 1990-04-27
DE4013534 1990-04-27

Publications (2)

Publication Number Publication Date
EP0453774A2 true EP0453774A2 (fr) 1991-10-30
EP0453774A3 EP0453774A3 (en) 1992-10-28

Family

ID=6405259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910104501 Withdrawn EP0453774A3 (en) 1990-04-27 1991-03-22 Solenoid actuator

Country Status (2)

Country Link
EP (1) EP0453774A3 (fr)
DE (1) DE4013534C1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5521566A (en) * 1994-08-25 1996-05-28 Clum Manufacturing Company, Inc. High amperage solenoid structure
DE59813555D1 (de) * 1997-11-18 2006-06-29 Bosch Gmbh Robert Einrückrelais für starter
JP6064577B2 (ja) * 2012-12-19 2017-01-25 株式会社デンソー スタータ用電磁スイッチ
JP5991189B2 (ja) * 2012-12-20 2016-09-14 株式会社デンソー スタータ用電磁スイッチ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2082380A5 (fr) * 1970-03-12 1971-12-10 Paris & Du Rhone
DE2646952B1 (de) * 1976-10-18 1978-02-09 Danfoss As Tauchanker-Relais

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2351273A1 (fr) * 1976-05-11 1977-12-09 Paris & Du Rhone Contacteur de demarreur pour moteur a combustion interne
DE3029408A1 (de) * 1980-08-02 1982-03-11 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetischer schalter, insbesondere fuer andrehvorrichtungen von brennkraftmaschinen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2082380A5 (fr) * 1970-03-12 1971-12-10 Paris & Du Rhone
DE2646952B1 (de) * 1976-10-18 1978-02-09 Danfoss As Tauchanker-Relais

Also Published As

Publication number Publication date
DE4013534C1 (fr) 1991-08-14
EP0453774A3 (en) 1992-10-28

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