EP0906632A1 - Bobine magnetique - Google Patents

Bobine magnetique

Info

Publication number
EP0906632A1
EP0906632A1 EP98928122A EP98928122A EP0906632A1 EP 0906632 A1 EP0906632 A1 EP 0906632A1 EP 98928122 A EP98928122 A EP 98928122A EP 98928122 A EP98928122 A EP 98928122A EP 0906632 A1 EP0906632 A1 EP 0906632A1
Authority
EP
European Patent Office
Prior art keywords
housing
insulating material
coil
opening
solenoid
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
Application number
EP98928122A
Other languages
German (de)
English (en)
Other versions
EP0906632B1 (fr
Inventor
Bernhard Just
Martin Metzger
Andreas Eckert
Andreas Dutt
Karl Hoss
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.)
Helmut Hechinger & Co Elektrotechnische Bauelemente GmbH
Robert Bosch GmbH
Original Assignee
Helmut Hechinger & Co Elektrotechnische Bauelemente GmbH
Robert Bosch GmbH
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 Helmut Hechinger & Co Elektrotechnische Bauelemente GmbH, Robert Bosch GmbH filed Critical Helmut Hechinger & Co Elektrotechnische Bauelemente GmbH
Publication of EP0906632A1 publication Critical patent/EP0906632A1/fr
Application granted granted Critical
Publication of EP0906632B1 publication Critical patent/EP0906632B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/127—Encapsulating or impregnating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
    • Y10T29/49076—From comminuted material

Definitions

  • the invention is based on a magnetic coil according to the preamble of claim 1.
  • a magnetic coil is used in a distributor fuel injection pump according to DE-Al-43 39 948.
  • the magnet coil provided there is part of a solenoid valve of a distributor fuel injection pump and is thereby exposed to the fuel during operation.
  • the known magnetic coil is applied to a winding body made of insulating material and subsequently closed by an additional plastic cover.
  • the winding body made of plastic has extensions made of insulating material, within which the contact connections of the magnetic coil are guided. The areas of the contact connections thus surrounded by insulating material are passed through the openings in the bottom of the housing and are sealed on the outside by seals on a closure plate, which otherwise seals the fuel-carrying space of the fuel injection pump from the outside.
  • FIG. 1 has the advantage over that a precise positioning of the solenoid inside the pot-shaped housing is realized in a simple manner and thereby a high-density closure of the current-carrying parts of the solenoid is achieved to the outside.
  • the magnetic coil inserts into the housing in a contacting manner with the walls of the surrounding pot-shaped housing.
  • the magnetic coil is also securely fixed in this housing and an exact assignment to a magnetic armature of the magnetic coil can be achieved.
  • the openings that are required to lead the contact connections out of the space exposed to the fuel are filled and sealed intensively by the encapsulation of the magnetic coil with insulating material.
  • a third opening is provided in the pot-shaped housing through which a support part can be inserted to achieve a safe, accurate positioning of the magnetic coil within the insulating material surrounding it. Together with the contact connections of the magnetic coil, this serves to fix the position. That way it is It is possible to keep the position of the solenoid exactly when the solenoid is overmolded with insulating material. This means that the electrical values and the magnetic forces acting on an armature can also be precisely maintained.
  • the arrangement of the third opening through which a rod-shaped part can be inserted and the position of the contact connections are selected so that a stable three-point bearing of the coil is made possible during the spraying process.
  • a measuring point is created outside of the cup-shaped part, which ensures that the inner region of the cup-shaped housing is completely filled with the encapsulation of the magnetic coil, and that removal of the rod-shaped part is then still possible during the spraying process , so that the third opening and the coil are completely sealed at this point with insulating material.
  • This connector does not need when using the magnetic coil in an application according to the prior art
  • a method according to claim 5 is specified for producing a magnetic coil in the aforementioned embodiment.
  • the position of the solenoid inside the housing can thus no longer change, so that the need for fixing the position by the rod-shaped part becomes superfluous from this point in time, so that it can be removed from the cup-shaped housing of its encapsulation while the encapsulation process has not yet been completed. With removal of this retracting rod-shaped part, the rest of the interior beyond the bottom of the pot-shaped housing is then finally filled with insulating material.
  • a device for carrying out this method accordingly has a receptacle for the pot-shaped housing with exact position fixation, two spaces being formed on the side of the base facing away from the interior of the housing, through which the contact connections are passed and in the injection mold in an exact manner can support in a predetermined manner during the spraying process. Furthermore, a third space is provided between the base and the injection mold, within which the rod-shaped part for positioning the magnetic coil can be inserted through a feed opening in the wall of the injection mold and can be passed through the third opening in the base of the housing. Within these three rooms, the contact connections are overmoulded during the spraying process and the rod-shaped part is also first overmolded. At the end of the injection process, this third space is then completely filled after the rod-shaped part has been withdrawn.
  • the solenoid coil is advantageously used in a distributor injection pump according to claim 7.
  • This component has, according to claim 8, a receptacle which completely surrounds the insulating material closure part projecting outwards at the third opening of the cup-shaped housing.
  • FIG. 1 shows the magnetic coil according to the invention in section with a rod-shaped part to be withdrawn during the spraying process
  • FIG. 2 shows the use of fertilizer of the solenoid according to Figure 1 in a distributor fuel injection pump.
  • Figure 1 shows a magnetic coil 1 in section, which has a winding 2, which is inserted in a winding carrier 3.
  • This has the shape of a ring with a U-shaped cross section in such a way that an annular groove opening outwardly on the circumference for receiving the winding 2 is formed.
  • two receptacles for contact connections 5 of the winding 2 are provided axially parallel to its central axis 4, only one of which is shown here in section.
  • This contact terminal 5 has a connection to the winding and is used for supplying or removing current.
  • the magnet coil 1 is arranged within a pot-shaped housing 6, which has a peripheral wall 7, a bottom 8 and a connecting piece 9 projecting from the bottom into the interior of the pot-shaped housing.
  • the socket has a bore 10 lying coaxially to the central axis, into which a magnet armature is immersed and which serves to guide the magnetic flux from the magnet core to the armature.
  • the magnet is thus designed as a plunger magnet.
  • a type of annular space is formed between the nozzle 9 and the peripheral wall 7, within which the magnet coil is arranged.
  • the coil body 3 is provided with an encapsulation 11 of insulating material such that the coil with its winding body 2 is completely surrounded by insulating material and this insulating material contacts the peripheral wall 7, the inner bottom surface and part of the connecting piece.
  • two openings 12 are provided in the base 8, through which a socket 14 of the winding support, which accommodates the respective contact connection 5, in each case, surrounded by insulating material, projects outwards.
  • the insulating material coating 11 continues with the formation of a cylindrical insulating material neck 15 which encloses part of the length of the respective contact connection 5.
  • a third opening 17 is provided in the bottom 8, through which a socket 18 of similar design, such as the socket 14 of the winding support, projects outwards and which socket 18 is also surrounded by insulating material 11 in the finished state of the magnet coil.
  • This insulating material continues to the outside to form an insulating connecting piece 19.
  • the two contact connections mentioned and this insulating connecting piece are arranged in the manner of a three-point bearing at approximately equal distances from one another.
  • the metal, e.g. made of steel housing 6 is pressed into a steel ring 20, which serves as a further structural part for the assembly of the solenoid in its later use. For the invention, this ring is initially of no importance.
  • the magnet coil with its housing according to FIG. 1 is inserted into an injection mold 22, which is only indicated schematically here.
  • an injection mold 22 which is only indicated schematically here.
  • Recesses are available for receiving the pot-shaped housing and for forming the insulating connector 19 and the insulating neck 15 of the contact connections.
  • a pressure sensor 27 is arranged in the wall of the insulating material connector and is connected to a control device, not shown here.
  • arrangements 23 are provided in the injection mold, which serve to support the contact connections 5 in an intended exact assignment to the position of the pot-shaped housing. These arrangements 23 can be designed as blind holes, which also form a depth stop or there can be tight passages through the wall of the injection mold, in connection with which stops for fixing the position of the contact connections are arranged. The cross sections of the passages or the material holes are adapted to the cross section of the contact connections to form a tight seal.
  • a further bore 24 is provided in the injection mold 22, through which a rod-shaped part 25 can be inserted, so that it comes into contact with the socket 18 or with other designs for contact with the winding support 3 if the encapsulation with insulating material has not yet taken place.
  • this rod-shaped part 25 With the help of this rod-shaped part 25, the exact position of the winding 2 with winding carrier 3 is ensured within the pot-shaped housing before the encapsulation.
  • a spray head (not shown here) is supplied for the spraying process, which specifies the shape of the extrusion coating 11, as shown in the final state in FIG. 1.
  • Insulating material is introduced for the spraying process in such a way that the insulating material flows around the magnet coil, which is secured against displacement, and then emerges from the cup-shaped housing to the side of the openings 12 and 17 for further shaping and filling of the adjoining spaces between the cup-shaped housing 6 and the injection mold 22.
  • the space forming the neck of the insulating material and the space forming the insulating stub 19 are then filled with plastic.
  • the rod-shaped part is initially in its intended position, in which it fixes the magnet coil.
  • the plastic then emerges into the space forming the connection piece 19, it triggers a signal on the pressure sensor when the space is essentially filled with insulating material, that is to say the encapsulation of the solenoid coil within the housing is complete.
  • insulating material that is to say the encapsulation of the solenoid coil within the housing is complete.
  • the space forming the socket 19 is up to 90% full of insulating material and furthermore, the openings 12 and 17 and the adjoining spaces within the injection mold 22 are filled with insulating material.
  • the rod-shaped part 25 is withdrawn via the control when this pressure signal is emitted, so that in a remaining spraying process the space forming the isolating nozzle 19 is completely and only filled with isolating material.
  • the magnet coil with winding within the pot-shaped housing produced in this way is particularly preferably used in a distributor injection pump, for example in the manner shown in FIG.
  • Magnetic coils that are produced in this way can, however, also be used in a variety of other forms. It is essential that the winding of the magnetic coil is extrusion-coated on all sides with the exception of the necessarily existing outlets of the contacting connections 5. Seals can be made on these connections in the area of the plastic enclosure of these contact connections, with which a reliably liquid-tight separation between one on the floor side of the pot-shaped housing area and one on the side of the opening of the pot-shaped housing lying area can be made.
  • the magnetic coil can be used particularly advantageously in a distributor injection pump according to FIG. 2. This is cut in FIG. 2 in the subarea essential here.
  • a bushing 30 is inserted in a pump housing 29 of the fuel injection pump, which in turn has a guide bore 31 in its interior, in which a distributor 33 is guided. This is e.g. driven by the camshaft of an associated internal combustion engine. It is secured axially in the housing 29 against displacement and has a longitudinal channel 34 which is connected on one side to a pump work chamber (not shown here further) and on the other side opens into a pressure chamber 35 which is part of an end face 37 of the distributor outgoing, blind ending, 38 coaxial to the axis of the distributor.
  • the pressure space is delimited on one side by a valve seat 39, which merges into a further relief-side partial bore 40 of the channel 38.
  • a valve seat 39 On the other side of the pressure chamber 35 there is a coaxial guide bore 42, which emerges at the front side 37 of the distributor and receives a valve member 46 which interacts with the valve seat 39.
  • a magnetic disk 43 is screwed onto the front side 37 of the distributor and has a keyhole-like recess 44. Through this, a neck 45 of the valve member 46 of the solenoid valve 47 projects into a narrow part lying coaxially to the axis of the distributor. This is inserted with its solenoid valve housing 49 into a recess 41 of the pump housing 29 of the fuel injection pump and is stationary there fixed.
  • the solenoid valve housing 49 has an electromagnet 50 with the magnet coil 1, which is arranged inside the pot-shaped housing 6 which forms a magnet core and which has the shape of a ring pot with a central socket 9 as a sleeve-shaped magnet core and the peripheral wall 7 as a magnet outer jacket between the and the socket, the solenoid with its winding 2 is mounted.
  • the magnetic core is supplemented by the magnetic disk 43, the diameter of which is adapted to the inner diameter of the outer magnet shell and forms only a narrow radial air gap with it. This enables the magnetic disk 43, which is part of the magnetic circuit, to rotate together with the rotating distributor 33 when the electromagnet 50 is stationary.
  • a magnet armature in the form of a plunger armature 52 is immersed in the bore 10 of the connecting piece 9. The latter is then fastened to the neck 45 of the valve member 46 at a head-like end 53 and actuates the valve member toward its seat 39 in the closing direction when the solenoid coil is excited.
  • a compression spring 55 which is supported in the partial bore 40, acts on the valve member in the opening direction.
  • the armature can also form the head-like end 53 of the valve member 46 in one piece.
  • the stroke of the valve member is limited by the abutment of a shoulder 56 of the valve member on the magnetic disk.
  • the shoulder is formed by the transition of the part of the valve closing member 46 sliding in the guide bore 42 to the neck 45.
  • the closure part has a circumferential groove 61 into which a seal 62 which interacts with the wall of the recess 41 is inserted and lies with its central part on the cup-shaped housing 6, so that the bore 10 is closed by this part.
  • the closure member 60 has two through openings 64 through which the contact connections 5 of the magnetic coil are passed, which are then connected to the outside of the power source. Sealing rings 65 cooperate with the wall of these passage openings 64, which, on the other hand, bear tightly against the insulating material necks 15 of the contact connections 5 and thus also prevent fuel passage to the outside at this point.
  • the closure part 60 has a recess 66 which is closed to the outside. No seal is therefore required at this point, which is made possible due to the special design and manufacture of the magnetic coil 1 in its housing 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une bobine magnétique montée dans un boîtier cupuliforme (6) présentant une tubulure (9) pour guider le flux magnétique vers un induit. Le positionnement de la bobine magnétique à l'intérieur de ce boîtier cupuliforme (6) est fixé par un enrobage en matière isolante injectée (11). Cette bobine magnétique comporte des bornes de contact (5) enrobées de matière isolante, qui font saillie vers l'extérieur à travers le fond (8) du boîtier cupuliforme (6). Ledit fond (8) présente en outre une troisième ouverture qui est également remplie de matière isolante et offre la possibilité d'introduire, pendant l'enrobage par injection, un élément en forme de broche (25) pour soutenir la bobine magnétique.
EP98928122A 1997-04-10 1998-04-03 Bobine magnetique Expired - Lifetime EP0906632B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19714812 1997-04-10
DE19714812A DE19714812A1 (de) 1997-04-10 1997-04-10 Magnetspule
PCT/DE1998/000942 WO1998045860A1 (fr) 1997-04-10 1998-04-03 Bobine magnetique

Publications (2)

Publication Number Publication Date
EP0906632A1 true EP0906632A1 (fr) 1999-04-07
EP0906632B1 EP0906632B1 (fr) 2003-08-20

Family

ID=7826011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98928122A Expired - Lifetime EP0906632B1 (fr) 1997-04-10 1998-04-03 Bobine magnetique

Country Status (7)

Country Link
US (1) US6164266A (fr)
EP (1) EP0906632B1 (fr)
JP (1) JP2000512811A (fr)
CN (1) CN1163917C (fr)
CZ (1) CZ404498A3 (fr)
DE (2) DE19714812A1 (fr)
WO (1) WO1998045860A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000298875A (ja) * 1999-02-13 2000-10-24 Sony Corp 光記録媒体
DE19963718B4 (de) * 1999-12-29 2004-05-13 Robert Bosch Gmbh Verfahren zum Herstellen eines Magnetventils, Magnetventil und Kraftstoffpumpe mit Magnetventil
KR100614081B1 (ko) * 1999-12-30 2006-08-22 한라공조주식회사 필드코일 어셈블리
DE10119982A1 (de) * 2001-04-24 2002-10-31 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10151955A1 (de) * 2001-10-22 2003-05-08 Bosch Gmbh Robert Massereduzierter Magnetspulenträger
JP2007524754A (ja) * 2003-01-22 2007-08-30 ハネウエル・インターナシヨナル・インコーポレーテツド 薄膜または薄層をイオン化蒸着する装置およびその方法
DE102005014172A1 (de) * 2004-03-30 2005-10-20 Denso Corp Elektromagnetischer Steller und Kraftstoffeinspritzventil, welches diesen verwendet
DE102007052204A1 (de) * 2007-10-30 2009-05-07 Robert Bosch Gmbh Spulenkontaktierung
DE102007059264A1 (de) 2007-12-10 2009-06-18 Robert Bosch Gmbh Stecker
DE102008010561A1 (de) 2008-02-22 2009-09-03 Robert Bosch Gmbh Einspritzventil mit Magnetverklebung
US11305884B2 (en) * 2019-03-19 2022-04-19 The Boeing Company Electric power and data communications within a fuel tank and across a wall of the fuel tank using resistive non-metallic wire and an optical hybrid fuel height sensor
US11325720B2 (en) 2019-03-19 2022-05-10 The Boeing Company Electric power and data communications within a fuel tank and across a wall of the fuel tank using resistive non-metallic wire
JP2021103011A (ja) * 2019-12-24 2021-07-15 株式会社ノーリツ 給湯装置
US20230072117A1 (en) * 2020-05-28 2023-03-09 Zhejiang Dunan Artificial Environment Co., Ltd. Solenoid Valve Coil
US11852518B2 (en) 2021-05-19 2023-12-26 The Boeing Company Resistive wire wiring shield to prevent electromagnetic interference

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3825134A1 (de) * 1988-07-23 1990-01-25 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil und verfahren zur herstellung
US5331730A (en) * 1992-09-03 1994-07-26 Siemens Automotive L.P. Method of making a coil molded into a magnetic stator
JP3069990B2 (ja) * 1993-04-27 2000-07-24 東洋電装株式会社 パルスジェネレータの製造方法
DE4339948A1 (de) * 1993-11-24 1995-06-01 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
DE9415014U1 (de) * 1994-09-15 1994-11-17 Siemens AG, 80333 München Miniaturisierte Magnetspule mit Jochring und dazugehörigem Spulenkörper
US5785394A (en) * 1996-05-24 1998-07-28 Ford Global Technologies, Inc. Solenoid assembly for anti-lock braking system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9845860A1 *

Also Published As

Publication number Publication date
WO1998045860A1 (fr) 1998-10-15
DE19714812A1 (de) 1998-10-15
CN1163917C (zh) 2004-08-25
DE59809330D1 (de) 2003-09-25
EP0906632B1 (fr) 2003-08-20
US6164266A (en) 2000-12-26
JP2000512811A (ja) 2000-09-26
CN1223005A (zh) 1999-07-14
CZ404498A3 (cs) 1999-03-17

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