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EP1587115B1 - Magnet armature - Google Patents

Magnet armature Download PDF

Info

Publication number
EP1587115B1
EP1587115B1 EP05075509.9A EP05075509A EP1587115B1 EP 1587115 B1 EP1587115 B1 EP 1587115B1 EP 05075509 A EP05075509 A EP 05075509A EP 1587115 B1 EP1587115 B1 EP 1587115B1
Authority
EP
European Patent Office
Prior art keywords
magnet armature
seat
cavity
armature construction
positively locking
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
EP05075509.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1587115A1 (en
Inventor
Jacob Michiel Van Houte
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.)
Helvoet Rubber and Plastic Technologies BV
Original Assignee
Helvoet Rubber and Plastic Technologies BV
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 Helvoet Rubber and Plastic Technologies BV filed Critical Helvoet Rubber and Plastic Technologies BV
Publication of EP1587115A1 publication Critical patent/EP1587115A1/en
Application granted granted Critical
Publication of EP1587115B1 publication Critical patent/EP1587115B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/088—Electromagnets; Actuators including electromagnets with armatures provided with means for absorbing shocks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding

Definitions

  • the invention relates to a magnet armature according to the preamble of the main claim.
  • a magnet armature of this type is known per se from EP-A-1 244 116 .
  • This known magnet armature comprises a cylindrical body made of ferromagnetic material having a lateral surface and two head ends. At least one of the head ends is provided with a seat in order to accommodate an elastomer sealing element.
  • This seat consists of a recess with respect to the head end face and has a bottom surface and a circumferential wall.
  • the sealing element is injection-moulded into this seat and preferably extends above the head end of the cylindrical body.
  • the sealing element is anchored solely in a positively locking manner to the seat. Solely in a positively locking manner means that no additional adhesive agents are provided and no additional adhesive treatments are carried out, resulting in cost savings.
  • the anchoring in a positively locking manner is achieved by providing the circumferential wall of the seat with an undercut, screw thread, toothing or the like. The action of this anchoring is not satisfactory.
  • the object of the invention is to provide an improved magnet armature of the type mentioned in the introduction with a satisfactory anchoring of the sealing element.
  • a small cavity is made in the ferromagnetic material, through the bottom surface of the seat, at the head end of the preferably cylindrical body.
  • This cavity is recessed with respect to the seat, the seat itself being recessed with respect to the head end face.
  • This cavity is preferably cylindrical.
  • the circumferential wall of the cavity is provided with one or more positively locking geometric formations, such as a screw thread or a toothing.
  • a non-crosslinked elastomer sealing is injection-moulded into this cavity and into the seat, following which it undergoes a vulcanizing or crosslinking treatment.
  • the section of the elastomer sealing which is in the cavity forms a mechanical anchoring for the elastomer sealing element.
  • both head ends are provided with a seat and an associated elastomer sealing element.
  • both seats are connected to one another by means of an internal duct in the ferromagnetic body.
  • the cavities are provided with positively locking geometric formations in the circumferential wall of the cavities, through the bottom surfaces of both seats. These cavities can be connected to one another by means of an internal duct. As a result of the positively locking formations of the cavities, the sealing elements will remain firmly anchored to the ferromagnetic body.
  • a first embodiment of a magnet armature construction according to the invention is denoted in its entirety in Figs. 1 and 2 by the reference numeral 1.
  • the construction 1 comprises a cylindrical body 2, made of ferromagnetic material.
  • the cylindrical body 2 comprises a lateral surface 3 and two head ends 4.
  • a seat 5 designed as a recess is provided in one of the head ends, which seat comprises a bottom surface 6 and a circumferential wall 7.
  • the circumferential wall 7 tapers towards the head end 4 of the cylindrical body 2.
  • the circumferential wall 7 is provided with a screw thread.
  • a cavity 8 is provided in the cylindrical body 2 through the bottom surface 6 of the seat 5, so that the cavity 8 forms a further recess with respect to the head end.
  • This cavity 8 is preferably cylinder-shaped.
  • the longitudinal axis of the cylinder-shaped cavity 8 runs parallel to the longitudinal axis of the cylindrical body 2.
  • this cavity is provided with a screw thread 9, but may, in an embodiment which has not been shown, also be provided with other positively locking geometric formations, such as toothing.
  • An elastomer sealing element 10 is injection-moulded into the seat 5 and in the cavity 8, which is indicated in its entirety as being hatched.
  • the elastomer sealing element 10 preferably extends to above the head end 4 of the cylindrical body 2.
  • the diameter of the section of the elastomer sealing element 10 which extends above the head end 4 is not larger than the diameter of the cylindrical body 2.
  • Fig. 3 shows a second embodiment of a magnet armature construction according to the invention, designated by the reference numeral 11. Identical parts have been designated by the same numerals as those used in Figs. 1 and 2 .
  • the cavities 8, provided through the opposite bottom surfaces 6 of the seats 5 in the cylindrical body, are connected to each other by an internal duct 12 in the cylindrical body 2. At least both cavities 8 are provided with a screw thread 9, but the internal duct 12 may also be provided with a screw thread or another positively locking geometric formation.
  • Two possible embodiments of the circumferential wall 7 of the seat 5 are shown: a toothing and a combination of a toothing and a circumferential wall 7 tapering towards the head end 4.
  • Possible dimensions for the cylindrical body 2 are a total length of 20-25 mm and a diameter of 6.5-8 mm.
  • the seat 5 may have a diameter of 5-7 mm and is preferably 2-3 mm deep.
  • the cavity 8 may have a diameter of 2-3 mm and is preferably 2-4 mm deep.
  • Fig. 4 shows a solenoid valve 20 in a housing 25 with a duct 24.
  • the solenoid valve 20 comprises a coil 21 and a cylinder-shaped shaft 22 for a magnet armature construction 1 within the coil 21.
  • the magnet armature construction 1 is held in place by a spring 23.
  • the magnet armature construction 1 is identical to the construction illustrated in Fig. 1 and therefore identical parts are designated by identical numbers. If sufficient current flows through the coil 21 to overcome the spring force of the spring 23, the magnet armature construction 1, as a result of the force of the magnetic field which has been created, pushes the spring 23 downward as a result of which the valve at the top near the duct 24 is opened.
  • Fig. 5 shows a vehicle 30 equipped with an anti-lock braking system 31 provided with a magnet armature construction 1 according to the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Braking Arrangements (AREA)
  • Push-Button Switches (AREA)
EP05075509.9A 2004-04-14 2005-03-02 Magnet armature Expired - Lifetime EP1587115B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1025947A NL1025947C2 (nl) 2004-04-14 2004-04-14 Magneetanker.
NL1025947 2004-04-14

Publications (2)

Publication Number Publication Date
EP1587115A1 EP1587115A1 (en) 2005-10-19
EP1587115B1 true EP1587115B1 (en) 2017-10-25

Family

ID=34938079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05075509.9A Expired - Lifetime EP1587115B1 (en) 2004-04-14 2005-03-02 Magnet armature

Country Status (3)

Country Link
EP (1) EP1587115B1 (zh)
CN (1) CN1691219B (zh)
NL (1) NL1025947C2 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040342A1 (de) * 2006-08-29 2008-03-06 Robert Bosch Gmbh Anordnung von zwei Teilen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1136295A (zh) * 1993-10-08 1996-11-20 池东瀷 用于汽车防抱死刹车装置的液压控制装置的阀组件
CN2224457Y (zh) * 1994-06-23 1996-04-10 煤炭科学研究总院上海分院 带锁定机构的电磁铁
DE10113316A1 (de) * 2001-03-20 2002-09-26 Wabco Gmbh & Co Ohg Herstellverfahren für Magnetanker

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP1587115A1 (en) 2005-10-19
NL1025947C2 (nl) 2005-10-17
CN1691219A (zh) 2005-11-02
CN1691219B (zh) 2011-05-18

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