EP0990246A2 - Elektromagnetsystem und verfahren zum fügen von kern und joch in einem solchen system - Google Patents
Elektromagnetsystem und verfahren zum fügen von kern und joch in einem solchen systemInfo
- Publication number
- EP0990246A2 EP0990246A2 EP98934755A EP98934755A EP0990246A2 EP 0990246 A2 EP0990246 A2 EP 0990246A2 EP 98934755 A EP98934755 A EP 98934755A EP 98934755 A EP98934755 A EP 98934755A EP 0990246 A2 EP0990246 A2 EP 0990246A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- thread
- yoke
- section
- round hole
- 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
- 238000000034 method Methods 0.000 title claims description 10
- 238000005096 rolling process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000237942 Conidae Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
-
- 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
- H01F7/081—Magnetic constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
- H01H2050/367—Methods for joining separate core and L-shaped yoke
Definitions
- the invention relates to an electromagnetic system with a yoke and a core, which is fastened with a fastening end in a round hole of a yoke section, the core having a, preferably cylindrical, shaft and a conical section widening towards its fastening end, the latter having a diameter of Core diameter exceeding the round hole penetrates the material of the yoke.
- the invention also relates to a method for joining the core and yoke in such a system.
- EP 0 593 517 B1 discloses an electromagnet system of the type mentioned in the introduction, in which the core with its cylindrical shaft is inserted from the outside through a round hole in the yoke leg and is clamped with its end-side cone section in a bore in the yoke leg. To clamp and adjust the end position, the core is subjected to impulses. Although the core is firmly seated in this way, the impulsive impacts on other elements connected to the magnet system, for example on contacts, can cause unwanted vibrations and friction. In addition, the core can only be adjusted in one direction, namely in the direction of the core insert.
- the aim of the invention is to improve an electromagnetic system of the type mentioned in the introduction in such a way that a good and reliable connection and magnetic coupling of the core and the yoke is achieved in a simple manner, this connection being precise - both forward and backward. is adjustable.
- this aim is achieved in that a thread is formed on the tapered section of the core, which thread is screwed into the self-deforming wall of the yoke, which is also conically widened, in a self-deforming manner.
- the conical section of the core and the conical inner wall of the round hole in the yoke section are therefore already matched to one another.
- the final fastening into one another and the fine positioning are, however, carried out by turning the thread formed on the tapered section of the core, which digs into the smooth inner surface of the round hole when screwed in.
- This one thread on the core is relatively easy to produce, since it is not necessary to match it with a correspondingly prefabricated complementary nut thread in the yoke.
- the material displacement when the thread core is screwed into the yoke section results in an excellent tight fit and a good magnetic coupling between the two parts, even without additional measures.
- a particularly good coupling results when the thread on the core is designed as a flat thread, that is, when the Individual turns of the thread groove (or the thread grooves in the case of a multi-start thread) have a large distance in relation to the groove depth, so that a flattened thread web is formed which is trapezoidal in cross section or approximately sawtooth-shaped on one side with a steeper flank.
- the conical section of the core and the conical inner wall of the round hole in the yoke can, for example, have an angle with respect to the core axis of between 0.5 ° and 5 °. However, it is preferable to choose an angle similar to that of taper sleeves and taper shanks for self-locking tool attachment.
- the angle of the cone shell with respect to the axis is between 1 ° and 2 °, preferably approximately 1.5 ° (1 ° 30 ') or between 1 ° 25' and 1 ° 30 'for the so-called Morse cone. With this small pitch angle, it would also be conceivable to design the shaft of the core with the fastening section to be slightly conical throughout (with a pitch of approximately 1 °).
- the thread on the tapered section can be produced particularly easily if the thread groove (or thread grooves) has (or has) a constant inner core diameter. This means that the thread at the narrowest point of the cone section is not or only slightly buried, while it is cut deeper and deeper towards the widened end. A particularly simple manufacture and processing results in the design as a rolling thread.
- both the yoke and the core are expediently soft-annealed.
- the soft-annealed yoke also has the advantage that it slightly expands or deforms when the thread core is screwed in, so that excessive torques are not required.
- a surface coating made of copper or copper graphite can facilitate screwing in and prevent seizure. This can be done almost without additional effort, since a coating, for example with Cu, is anyway desired as a protection against corrosion.
- the thread runs partly in the coating, which serves as a kind of lubrication.
- a method according to the invention for joining the core and yoke in the electromagnet system according to the invention essentially has the following steps:
- FIG. 1 shows a double relay with two coupled magnet systems according to the invention
- FIGS. 2 and 3 show a partially cut-open core of a magnetic system according to FIG. 1 in a perspective illustration and in a side view
- FIG. 4 shows an enlarged detail IV from FIG. 3 and FIG. 5 shows the same detail as FIG. 4, but with a modified thread shape.
- the double relay shown in FIG. 1 has two magnet systems, each with a yoke 1, which has a longitudinal section 11 and a transverse section 12.
- a core 2 with a round cross section is fastened in each of the yoke cross sections 12, which will be described in detail later.
- Each of these cores 2 has a pole end 21 with a pole face 22 which forms an operating air gap with an armature 3.
- the two longitudinal yoke legs 11 are integrally connected to one another, and the common armature 3 interacts alternately with the two cores 2. It follows from this example that in such a case the core can only be installed by inserting it from the outside through the yoke leg 12. Otherwise, the invention could also be used in the same way for a single relay with only one yoke and one core.
- the double relay shown also has, in a known manner, a coil former 4 as a carrier for two windings 5, as well as contact springs 6 and fixed contacts 7.
- This relay structure is known per se and need not be discussed further in connection with the present invention.
- the coil core 2 is each fastened with a fastening end 23 in a round hole 13 of the yoke cross leg 12.
- This round hole 13 is flared to match the core 2 from the inside (from the coil) to the outside and matched to the diameter of the core so that the penetration described below results in a good tight fit and a good magnetic coupling.
- the core 2 has a cylindrical shaft 24, the diameter of which is somewhat smaller than the narrowest diameter of the round hole 13, so that it can easily be inserted from the outside through the yoke section 12 into the coil. Furthermore, the core 2 has a conical section 25 which widens conically towards the fastening end 23 is. Towards the end, the slope has an angle ⁇ with respect to the axis of the core, which can be approximately between 0.5 ° and 5 °. However, as already mentioned, this angle is preferably between 1 ° and 2 °.
- the round hole 13 has approximately the same slope.
- FIG. 4 shows an enlarged representation of the detail IV in FIG. 3. From this it can be seen that the depth of the thread groove 26 is small in comparison to the thread pitch s (in the case of a single-start thread), so that the thread web 27 has a flattened top side 28, that is to say has a trapezoidal cross section according to FIG.
- the inside diameter of the thread is preferably kept the same for manufacturing reasons, so that the thread groove 26 at the beginning of the conical section 25 - that is to say with its smallest diameter - is not or only slightly buried in the surface, while this groove becomes ever deeper towards the end 23.
- a multi-start thread could also be provided.
- the thread groove 26 has an opening angle ⁇ of approximately 60 °, the width of the surface 28 of the thread web 27 (in the vicinity of the end 23) being approximately half the pitch s.
- a thread cross section in the form of a flattened saw tooth can be provided.
- the thread web 27 has a flattened upper side 28 which, for example in the vicinity of the end 23, in turn has a width which corresponds to approximately half the thread pitch s. In the area of the smaller cone diameter, the thread web is of course still wider, since there the thread groove has a smaller depth d.
- a hexagonal recess is formed centrally from the fastening end 23, which enables the attack of a turning tool.
- Hexagon can also be chosen any other shape that allows the attack of a screwing tool.
- the round hole 13 is preferably first preformed by a punching needle and then calibrated by means of a conical pin to form a conical extension.
- the yoke is then soft annealed to produce homogeneous magnetic properties and to provide a certain degree of flexibility when the core is screwed in.
- the core is produced in the usual way with the cylindrical shaft 24 and the conical shoulder 25 and the hexagon recess 29. It is then also soft-annealed and then passed through a thread rolling device, where the flat thread already described is rolled up on the cone section 25. The rolling process results in small poses 30 on the flanks of the thread web 27 due to material displacement. These poses 30 undergo a slight hardening and thereby improve the penetration of the thread into the threadless inner surface of the round hole 13 when the core is screwed in.
- the core 2 thus prepared is, as already mentioned, inserted from the outside through the round hole 13 until the tapered section 25 clamps with its thread in the round hole 13. Then it is screwed in further using a suitable turning tool and using a certain axial force, the thread digging into the material of the yoke.
- the core can be positioned very precisely in the axial direction - in relation to an anchor - whereby the thread also allows a certain backward adjustment by turning back. In any case, this ensures a good tight fit of the core in the yoke and a good magnetic coupling between the core and the yoke.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19726055A DE19726055C1 (de) | 1997-06-19 | 1997-06-19 | Elektromagnetsystem und Verfahren zum Fügen von Kern und Joch in einem solchen System |
DE19726055 | 1997-06-19 | ||
PCT/DE1998/001386 WO1998059351A2 (de) | 1997-06-19 | 1998-05-20 | Elektromagnetsystem und verfahren zum fügen von kern und joch in einem solchen system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0990246A2 true EP0990246A2 (de) | 2000-04-05 |
EP0990246B1 EP0990246B1 (de) | 2002-08-28 |
Family
ID=7833034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98934755A Expired - Lifetime EP0990246B1 (de) | 1997-06-19 | 1998-05-20 | Elektromagnetsystem und verfahren zum herstellen eines solchen systems |
Country Status (8)
Country | Link |
---|---|
US (1) | US6300851B1 (de) |
EP (1) | EP0990246B1 (de) |
JP (1) | JP3923092B2 (de) |
KR (1) | KR100515433B1 (de) |
CA (1) | CA2294156C (de) |
DE (2) | DE19726055C1 (de) |
TW (1) | TW382715B (de) |
WO (1) | WO1998059351A2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3590738B2 (ja) * | 1999-04-27 | 2004-11-17 | Necトーキン株式会社 | 電磁継電器およびその調整方法と組立方法 |
US7548146B2 (en) * | 2006-12-27 | 2009-06-16 | Tyco Electronics Corporation | Power relay |
JP4803206B2 (ja) * | 2008-04-24 | 2011-10-26 | パナソニック電工株式会社 | リレー用電磁石 |
EP3025846B1 (de) * | 2014-11-28 | 2019-11-13 | Crompton Technology Group Limited | Zusammengesetzter Zug-/Druckstab |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3209294A (en) * | 1962-10-23 | 1965-09-28 | Westinghouse Electric Corp | Magnetic core structures |
DE3148052A1 (de) * | 1981-12-04 | 1983-06-09 | Robert Bosch Gmbh, 7000 Stuttgart | Elektromagnetisches relais und verfahren zu seiner herstellung |
US4720909A (en) * | 1983-10-31 | 1988-01-26 | Amf Inc. | Method of manufacturing miniature power switching relays |
JPH05506957A (ja) * | 1990-05-14 | 1993-10-07 | シーメンス アクチエンゲゼルシヤフト | 電磁切換装置および該装置を製造する方法 |
DE4122705C1 (de) * | 1991-07-09 | 1992-07-30 | Siemens Ag, 8000 Muenchen, De | |
US5311162A (en) * | 1993-05-14 | 1994-05-10 | Evolutionary Concepts, Inc. | Solenoid device |
JPH0917312A (ja) * | 1995-06-27 | 1997-01-17 | Matsushita Electric Works Ltd | 有極リレー |
-
1997
- 1997-06-19 DE DE19726055A patent/DE19726055C1/de not_active Expired - Fee Related
-
1998
- 1998-05-13 TW TW087107378A patent/TW382715B/zh not_active IP Right Cessation
- 1998-05-20 CA CA002294156A patent/CA2294156C/en not_active Expired - Fee Related
- 1998-05-20 JP JP50352999A patent/JP3923092B2/ja not_active Expired - Fee Related
- 1998-05-20 WO PCT/DE1998/001386 patent/WO1998059351A2/de active IP Right Grant
- 1998-05-20 EP EP98934755A patent/EP0990246B1/de not_active Expired - Lifetime
- 1998-05-20 DE DE59805327T patent/DE59805327D1/de not_active Expired - Fee Related
- 1998-05-20 KR KR10-1999-7011953A patent/KR100515433B1/ko not_active IP Right Cessation
- 1998-05-20 US US09/445,707 patent/US6300851B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9859351A2 * |
Also Published As
Publication number | Publication date |
---|---|
JP3923092B2 (ja) | 2007-05-30 |
CA2294156C (en) | 2006-12-05 |
JP2002508881A (ja) | 2002-03-19 |
CA2294156A1 (en) | 1998-12-30 |
WO1998059351A2 (de) | 1998-12-30 |
TW382715B (en) | 2000-02-21 |
EP0990246B1 (de) | 2002-08-28 |
WO1998059351A3 (de) | 1999-03-18 |
DE59805327D1 (de) | 2002-10-02 |
DE19726055C1 (de) | 1998-11-12 |
KR20010013931A (ko) | 2001-02-26 |
US6300851B1 (en) | 2001-10-09 |
KR100515433B1 (ko) | 2005-09-20 |
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