EP1284003A1 - Magnetspulenanordnung - Google Patents
MagnetspulenanordnungInfo
- Publication number
- EP1284003A1 EP1284003A1 EP01931659A EP01931659A EP1284003A1 EP 1284003 A1 EP1284003 A1 EP 1284003A1 EP 01931659 A EP01931659 A EP 01931659A EP 01931659 A EP01931659 A EP 01931659A EP 1284003 A1 EP1284003 A1 EP 1284003A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plug
- base
- connecting part
- metal housing
- coil arrangement
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 239000002184 metal Substances 0.000 claims abstract description 50
- 239000004020 conductor Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 7
- 238000005538 encapsulation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000005352 clarification Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
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
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F2007/062—Details of terminals or connectors for electromagnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/04—Arrangements of electric connections to coils, e.g. leads
Definitions
- the invention relates to a magnet coil arrangement, in particular for actuating valves, according to the preamble of claim 1.
- Such a magnetic coil arrangement is known from DE 43 41 087 C2.
- a coil former is arranged in a metal housing and is provided with an electrical winding.
- a plug-in base provided with contact lugs is held on the metal housing via a metallic connecting part.
- One of the contact lugs is connected to the metal housing as a protective conductor connection via the connecting part.
- the ends of the coil windings are connected to two further contact lugs.
- the free spaces between the wound bobbin, the metal housing and the plug base are filled with plastic. Moisture can penetrate into the magnet coil arrangement through gaps at the interfaces between the metal housing and the plastic.
- a sealing ring enclosing the connecting part is provided between the contact lug serving as a protective conductor connection and the metal housing.
- the connecting part is inserted into a recess in the metal housing and into one
- the sealing ring is clamped between the metal housing and the contact tab. Due to the curvature of the metal housing, the distance between the contact lug and the metal housing in the contact area of the sealing ring is of different sizes, so that the sealing ring deviates more or less far to the outside. This leads to an uneven deformation of the sealing ring over its circumference.
- the free circumferential surface of the sealing ring that is to say the surface of the sealing ring that is not in contact with a metal part, comes into contact with the plastic during the encapsulation. Due to the high temperature of the plastic during the molding process, the material of the sealing ring is subjected to high thermal stress.
- the invention has for its object to provide a magnet coil arrangement of the type mentioned, which prevents the transmission of liquid, which has penetrated into the magnet coil arrangement via a gap between the metal housing and the plastic adjacent to it, into the connection space.
- This object is achieved by the features characterized in claim 1.
- the sealing part does not touch the contact tab serving as a protective conductor connection or the metal housing. Since the contact lug extends within the plug base in the area in which the connecting part engages in it, it is sufficient that the sealing part rests on the one hand on the connecting part and on the other hand on the plug base.
- the sealing part Since the sealing part is already subjected to force before the magnetic coil arrangement is encapsulated, the pressure of the plastic plays no role in the encapsulation and in the subsequent cooling phase for the sealing effect. The shrinkage of the plastic during cooling also plays no role in the sealing effect.
- the sealing part can be arranged both radially and axially sealing between the connecting part and the plug-in base.
- sealing part is arranged in a radially sealing manner, it is advantageous to arrange the sealing part in a recess in the plug-in base which is adapted to the outer contour of the sealing part. If the recess is deeper than the thickness of the sealing part, the sealing part can deflect in the axial direction, ie in the installed state it assumes an essentially oval to egg-shaped cross section.
- a collar of the connecting part ensures a defined distance between the metal housing and the surface of the plug base facing it. If the outer diameter of the collar is larger than the inner diameter of the recess, no plastic gets into the sealing part when the magnetic coil arrangement is encapsulated.
- the part on the plug-in base prevents of the federal government, that the connecting part is pulled out of the plug base when there is a strong pull.
- the invention allows an axially sealing arrangement of the sealing part.
- the connecting part is provided with a collar that the
- the connecting part is rotationally symmetrical at least in the sealing area, a commercially available and therefore inexpensive O-ring can be used as the sealing part. If a side surface of the plug-in base is provided with a projection between the outward-facing side and the side of the plug-in base facing the metal housing, a positive connection results, which prevents the plug-in base from coming out of the plastic body even when there is a strong pull on the contact tabs or on the connecting part is pulled out.
- FIG. 1 shows a longitudinal section through part of a first magnet coil arrangement designed according to the invention
- FIG. 2 shows a section along the line AA in FIG. 1,
- FIG. 4 shows a section corresponding to FIG. 2 through a second magnet coil arrangement according to the invention
- FIG. 5 shows a section corresponding to FIG. 1 through a third magnet coil arrangement according to the invention and Figure 6 individual parts of the shown in Figure 5
- FIGS. 1 and 2 show different sections through part of a first magnet coil arrangement 10 designed according to the invention.
- FIG. 1 shows a longitudinal section through the magnet coil arrangement 10
- FIG. 2 shows a cross section along the line AA in FIG. 1.
- FIG. 3 shows FIG. 3 for clarification, individual parts of the magnet coil arrangement 10 shown in FIGS. 1 and 2 in the manner of an exploded drawing. The same components are provided with the same reference numerals.
- a coil body 12 provided with a winding 11 is surrounded by a cup-shaped metal housing 13.
- a serving as a protective conductor connection contact tab 15 and further contact tabs are arranged to which the ends of the winding 11 are connected.
- the further contact lugs and the winding ends are not shown in FIGS. 1 to 3 for reasons of clarity.
- the contact lug 15 is enclosed by the material of the plug-in base 14, except for the region 15a projecting into a connection space 16.
- the contact lug 15 is inserted into the injection mold and then encapsulated with plastic.
- the connection space 16 is closed off by a schematically represented cap 17.
- a circumferential seal 18 prevents moisture from penetrating into the connection space 16.
- a bolt-shaped metallic connecting part 21 is arranged in a recess 20.
- the contact lug 15 is both mechanically held on the metal housing 13 via the connecting part 21 and also electrically connected to it. In a recess that runs concentrically to the recess 20
- an O-ring 23 serving as a sealing part is arranged.
- Both the recess 22 and the sealing area 21a of the connecting part 21 have a circular cross section in the sealing area.
- the recess 22 is larger in the axial direction of the connecting part 21 than the thickness of the O-ring 23.
- the O-ring 23 can thus deflect in the axial direction.
- a collar 21b the outside diameter of which is larger than the inside diameter of the recess 22, closes the recess 22. Its thickness determines the distance between the metal housing 13 and the plug-in base 14. As FIG. 2 shows in particular, the collar 21b lies because of the curvature of the metal housing 13 only linearly on this.
- the connecting part 21 is provided with a toothing 21c which is pressed into a corresponding through hole in the contact lug 15.
- the connecting part 21 is also provided with a further toothing 21d, which is pressed into a corresponding through hole of the metal housing 13.
- An internal thread 21e allows the cap 17 to be fastened to the magnet coil arrangement 10 by means of a screw connection.
- the collar 21b also secures the connecting part 21 against being pulled out of the plug base 14. Before the extrusion coating of the magnet coil configuration '10 of the O-ring is pushed onto the sealing region 21a 23rd Thereafter, the connecting part 21 with the O-ring 23 is pressed into the socket 14 until. the collar 21b rests flush on the plug base 14. The recess 22 is thus closed in such a way that no plastic gets into the recess 22 when it is subsequently encapsulated.
- the toothing 21d of the connecting part 21 is pressed into the metal housing 13 until the collar 21b touches the metal housing 13.
- the contact tab 15 is now electrically connected to the metal housing 13, and the plug base 14 is held in a defined position for the overmolding process on the metal housing 13.
- the coil body 12 provided with the winding 11 is guided into the metal housing 13 and the ends of the winding 11 are connected in an electrically conductive manner to the terminal lugs assigned to them.
- This structure is encapsulated with plastic in the usual way. The heated plastic flows into the free spaces and fills them up. After curing, the areas filled with plastic form a plastic body which is provided with the reference number 25 in FIGS. 1 and 2.
- two side surfaces of the plug base 14 are provided with projections 14a and 14b.
- the projections 14a and 14b are arranged between the outward-facing side 14c and the side 14d of the plug-in base 14 facing the metal housing 13 and are designed such that even when there is a strong pull on the plug-in base 14 - be it via the contact tab 15 or another Contact flag or above the connecting part 21 - the socket 14 can not be pulled out of the plastic body 25.
- the side 14d of the plug socket 14 facing the metal housing 13 is provided with three recesses 14e, 14f, 14g.
- the recesses 14e, 14f, 14g concentrically surround the connecting part 21 as self-contained grooves. They serve as melting edges, which are melted by the hot plastic during the encapsulation of the magnetic coil arrangement 10 and fuse with it.
- the melting temperature of the plastic used for the plastic body 25 is chosen to be higher than the melting temperature of the plastic used for the plug base 14.
- the recesses 14e, 14f, 14g serve as so-called labyrinth seals which prevent the penetration of moisture that has penetrated. In this way it is possible to securely seal the interfaces between the plug base 14 and the plastic body 25 against the ingress of moisture.
- the O-ring 23 serving as a sealing part is provided for this purpose, which rests radially sealingly against both the connecting part 21 and the plug-in base 14. Only up to this point can moisture, which has a gap between the metal housing 13 and the plastic body 25 and between the contact tab 15 and the plug-in base 14.
- Plastic body 25 has penetrated. However, because of the O-ring 23, no more moisture can get into the gap between the contact lug 15 and the plug-in base 14, via which moisture would be passed on to the connection space 16.
- the recess 22 and the collar 21b of the connecting part 21 form a chamber with an annular cross-section, in which the O-ring 23 is protected against contact with the hot plastic compound during the encapsulation. Since the O-ring 23 does not come into direct contact with the hot plastic, the thermal stress on the O-ring 23 during the encapsulation is only slight. The mechanical stress on the O-ring 23 is also low, since it only has to seal radially, but can escape within the recess 22 in the direction of the axis of the connecting part 21.
- FIG. 4 shows a second magnet coil arrangement 10 ′ according to the invention in a representation corresponding to FIG. 2.
- the same parts are provided with the same reference numerals.
- the cap closing the connection space 16 is provided with the reference symbol 17 '.
- the cap 17 'with the seal 18 rests on the plug base 14'.
- the connecting part between the metal housing 13 and the contact tab 15 is with the reference characters 21 '.
- the O-ring 23 is arranged axially sealing between the plug base 14 'and a collar 21b' of the connecting part 21 '.
- the collar 21b ' limits the distance between the metal housing 13 and the plug base 14'.
- the collar 21b ' determines the distance between the
- moisture that has penetrated through a gap between the metal housing 13 and the plastic body 25 can only reach the O-ring 23. Due to the sealing by the O-ring 23, however, moisture that has penetrated cannot get any further into the gap between the contact lug 15 and the plug-in base 14 ′, via which the moisture would be passed on into the connection space 16.
- FIGS. 5 and 6 show different sections through a part of a third magnet coil arrangement 10 ′′ designed according to the invention.
- FIG. 5 shows a section corresponding to FIG. 1 through the magnet coil arrangement 10 ′′. Only that section is shown in FIG that the magnet coil arrangement 10 "differs from the magnet coil arrangement 10 shown in FIG. 1.
- FIG. 6 shows individual parts of the magnet coil arrangement 10" shown in FIG. 5 in an exploded drawing corresponding to FIG. 2. The same components are given the same reference numerals Mistake.
- the third magnet coil arrangement 10 "differs from the magnet coil arrangements 10 and 10 'shown in FIGS. 1 to 4 with regard to the arrangement of the contact lug 15 in the plug-in base. This is provided with the reference symbol 14" in FIGS. 5 and 6. While in the magnetic coil arrangements 10 and 10 ', the contact tab 15 in the socket
- the plug-in base 14 " is provided with an additional recess 28, which is arranged perpendicular to the recess 20 for receiving the connecting part 21.
- the recess 28 serves for receiving the area of the contact lug 15 provided with the reference symbol 15b.
- the area 15b is provided with a through hole 29.
- the contact tab 15 does not need to be inserted into the injection mold.
- the contact tab 15 is inserted into the recess 20 of the plug-in base 14 "only before the encapsulation of the magnet coil arrangement 10".
- the connecting part 21 with the O-ring 23 is pushed into the recess 20 and the contact region 21c of the connecting part 21 into the through hole 29 of the contact lug 15 pressed until the collar 21b abuts the plug-in base 14 ".
- tactile flag 15 is secured in the further processing steps against slipping out of the plug base 14 ".
- the toothing 21d of the connecting part 21 has been pressed into the metal housing 13, the further processing steps take place as already described in connection with FIG. 3.
- the cap surrounding the connection space is not shown in FIG. 5. As shown in FIG. 2, it is to be designed such that it rests on the plastic body 25.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10025719 | 2000-05-25 | ||
| DE10025719 | 2000-05-25 | ||
| DE10049709A DE10049709A1 (de) | 2000-05-25 | 2000-10-07 | Magnetspulenanordnung |
| DE10049709 | 2000-10-07 | ||
| PCT/EP2001/004748 WO2001091140A1 (de) | 2000-05-25 | 2001-04-27 | Magnetspulenanordnung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1284003A1 true EP1284003A1 (de) | 2003-02-19 |
| EP1284003B1 EP1284003B1 (de) | 2009-12-02 |
Family
ID=26005813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01931659A Expired - Lifetime EP1284003B1 (de) | 2000-05-25 | 2001-04-27 | Magnetspulenanordnung |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6784778B2 (de) |
| EP (1) | EP1284003B1 (de) |
| WO (1) | WO2001091140A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004029185A1 (de) * | 2004-06-16 | 2006-01-12 | Hydac Electronic Gmbh | Betätigungsvorrichtung |
| US7517235B2 (en) | 2006-12-28 | 2009-04-14 | General Electric Company | Press fit connection for mounting electrical plug-in outlet insulator to a busway aluminum housing |
| DE202007005132U1 (de) * | 2007-04-04 | 2008-08-14 | Eto Magnetic Gmbh | Elektromagnetische Stellvorrichtung |
| DE102010055212A1 (de) * | 2010-12-20 | 2012-06-21 | Svm Schultz Verwaltungs-Gmbh & Co. Kg | Elektromagnet mit einem Anschlussbereich |
| US9583259B2 (en) | 2012-03-20 | 2017-02-28 | Qualcomm Incorporated | Wireless power transfer device and method of manufacture |
| US9160205B2 (en) | 2012-03-20 | 2015-10-13 | Qualcomm Incorporated | Magnetically permeable structures |
| US9653206B2 (en) | 2012-03-20 | 2017-05-16 | Qualcomm Incorporated | Wireless power charging pad and method of construction |
| US9431834B2 (en) | 2012-03-20 | 2016-08-30 | Qualcomm Incorporated | Wireless power transfer apparatus and method of manufacture |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4683454A (en) * | 1985-10-31 | 1987-07-28 | Automatic Switch Company | Solenoid actuator with electrical connection modules |
| US4682136A (en) * | 1985-11-26 | 1987-07-21 | United Technologies Automotive, Inc. | Fused covering for an electrical conductor and method for making the fused covering |
| IT213013Z2 (it) | 1987-11-24 | 1989-10-13 | Weber Srl | Bobina di eccitazione per una valvola di dosatura e di polverizzazione del carburante per un dispositivo ad iniezione del carburante in un motore a combustione interna |
| FR2640413B1 (fr) * | 1988-12-12 | 1993-04-02 | Mors | Agencement a bobine electrique, notamment electro-aimant, comprenant une carcasse de bobine et un capot de bobine |
| US5204044A (en) * | 1989-03-28 | 1993-04-20 | Aisan Kogyo Kabushiki Kaisha | Method of asembling a DC solenoid with a thermistor |
| DE4341087C2 (de) | 1993-12-02 | 1996-02-08 | Bso Steuerungstechnik Gmbh | Abgedichtete Schaltvorrichtung |
| US6076550A (en) * | 1995-09-08 | 2000-06-20 | Toto Ltd. | Solenoid and solenoid valve |
| DE19622634A1 (de) | 1996-06-05 | 1997-12-11 | Nass Magnet Gmbh | Magnetspule sowie Verfahren zu deren Herstellung |
| US5710535A (en) * | 1996-12-06 | 1998-01-20 | Caterpillar Inc. | Coil assembly for a solenoid valve |
| US6121865A (en) | 1998-08-03 | 2000-09-19 | Caterpillar Inc. | Solenoid assembly having a sealing device for the electrical leads |
| US6127912A (en) * | 1998-08-03 | 2000-10-03 | Caterpillar Inc. | Bobbin for an encapsulated coil of a solenoid assembly |
| DE19854100B4 (de) | 1998-11-24 | 2013-10-10 | Bosch Rexroth Aktiengesellschaft | Magnetspulenanordnung |
| DE19958199A1 (de) * | 1998-12-11 | 2000-06-29 | Continental Teves Inc | Elektrischer Verbinder zum Herstellen einer lötfreien Verbindung zwischen einer Spule und einer Leiterplatte |
| US6310533B2 (en) * | 1999-07-20 | 2001-10-30 | Cliftronics, Inc. | Water-resistant encapsulation of solenoid |
-
2001
- 2001-04-27 WO PCT/EP2001/004748 patent/WO2001091140A1/de not_active Ceased
- 2001-04-27 US US10/276,534 patent/US6784778B2/en not_active Expired - Fee Related
- 2001-04-27 EP EP01931659A patent/EP1284003B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0191140A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20040104795A1 (en) | 2004-06-03 |
| US6784778B2 (en) | 2004-08-31 |
| WO2001091140A1 (de) | 2001-11-29 |
| EP1284003B1 (de) | 2009-12-02 |
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