US3792393A - Arrangement for adjusting the air gap in an electromagnetic switching apparatus - Google Patents

Arrangement for adjusting the air gap in an electromagnetic switching apparatus Download PDF

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Publication number
US3792393A
US3792393A US00314563A US3792393DA US3792393A US 3792393 A US3792393 A US 3792393A US 00314563 A US00314563 A US 00314563A US 3792393D A US3792393D A US 3792393DA US 3792393 A US3792393 A US 3792393A
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US
United States
Prior art keywords
housing
switching
adjusting
wedge surfaces
adjustment
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
US00314563A
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English (en)
Inventor
G Streich
J Bauer
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens Corp
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Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
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Publication of US3792393A publication Critical patent/US3792393A/en
Anticipated expiration legal-status Critical
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    • 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

Definitions

  • ABSTRACT In an electromagnetic switching apparatus where the non-switching magnet part is in a housing and spring loaded in the direction toward the housing, means are provided for adjusting the air gap between the switching and non-switching magnet parts when the magnet is not energized, said means comprising at least one adjusting part having wedge surfaces and adjustable in the housing, being placed between the non-switching magnet part and the housing, such that the nonswitching magnetic part can be lifted from the housing by moving the adjustingpart.
  • the shims which are not connected with the housing must be available as separate parts when the air gap is adjusted DESCRIPTION OF THE INVENTION
  • an arrangement for adjusting the air gap of the kind mentioned above is provided with which it is possible to adjust the stroke of the movable magnet part by simple means from the outside, after the equipment is completely assembled. This is achieved in a simple manner by providing the adjustment parts with wedge surfaces which are adjustplastic, are thermally pressed together with the housing so that it is impossible for the disc to turn back. If, on
  • the adjustment parts are held in the housing by means of a detent.
  • the detent angles can be selected dependent on the slope of the wedge surfaces, according to the requirements desired. Simple access to the compensating disc from the outside of the housing is achieved if the compensating disc is rotatably supported in a cutout of the housing via an extension which is provided with an adjustment slot.
  • the blade of v a positioning motor which, in the manner of a control,
  • One advantage of the present invention is that the residual tolerance of, say, $0.3 mm which remains when conventional compensation shims are used, is made substantially smaller due to the gradual adjustment, and the scatter zone of the curve of the magnetic attraction is reduced. Also more economical pull-up conditions are obtained.
  • the assembly of only one adjustment part means unilateral contact of the non-switching magnet part at the wedge. If two adjustment parts are inserted, provision is made that they are set uniformly together. In order to avoid these difficulties, it is advantageous to provide the wedge surfaces on a compensating disc which is rotatably supported in the housing. The number of the wedge surfaces can be determined according to the ad justment range, the disc diameter and the permissible angle of rotation.
  • FIG. 1 shows a side elevation, partly in cross section, through a non-switching magnet part pressed against the bottom of a housing, with a compensating disc placed underneath;
  • FIG. 2 shows the bottom of the electromagnetic switching device in a plan view
  • FIG. 3 shows a view of the compensating disc.
  • the non-switching magnet part 1 is pushed by means of a spring 3 braced against the housing 2 against a compensating disc 4, which itself is rotatably supported in the bottom 5 of the housing of the switching device.
  • the bottom 5 has a cutout 6 of circular shape through which an extension 7 of the disc 4 is brought.
  • a slot 8 in the disc 4 serves for adjusting the same.
  • three wedge surfaces 9 are molded into the bottom 5 of the switching device, which correspond essentially to the wedge surfaces 10 in a counterrota'ting sense.
  • the wedge surfaces 9 and 10 lie on a circular ring of the compensating disc 4.
  • Detent recesses 11 in the bottom 5 of the switching device serve as detents for resilient detent ratchets 12 which are molded on the compensating disc 4, which consists of plastic.
  • the non-switching magnet part is shown in FIG. 1 in a position indicated by dashed lines which shows the maximum adjustment excursion of this arrangement. Also indicated by dashed lines is the position of the compensating disc which corresponds to the greatest adjustment travel.
  • the compensating disc 4 is rotated clockwise by means of a tool inserted into the slot 8, so that the wedge surfaces 10, sliding on the wedge surfaces 9, lift the disc 4 from the bottom 5.
  • self-locking can be achieved by appropriate design of the inclination, so that through the force of the spring 3 it is impossible for the compensating disc to turn back by itself.
  • the edge of the slot 8 can be pressed against the edge of the cutout 6 by means of a hot stamp, as may be seen from FIG. 1, so that the tabs 13 visible in FIG. 1 result. If the tabs 13 arepushed in, the detent mechanism 11, 12 can be dispensed with. It would also be conceivable to cement the extension 7 in place in the cutout 6 after the magnet part 1 is adjusted.
  • the arrangement according to the invention achieves a practically continuous adjustment of the air gap between the switching magnet part 14 and the non-switching part 1 without disassembling the apparatus and without the need for additional parts for the adjustment.
  • apparatus for adjusting the air gap between the switching and the non-switching magnet parts when the magnet is not energized which comprises at least one adjustment part between the non-switching magnet part and the housing, said adjustment part having wedge surfaces which are adjustable with respect to the housing.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Air-Flow Control Members (AREA)
  • Electromagnets (AREA)
  • Magnetic Treatment Devices (AREA)
  • Tumbler Switches (AREA)
US00314563A 1971-12-16 1972-12-13 Arrangement for adjusting the air gap in an electromagnetic switching apparatus Expired - Lifetime US3792393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2162363A DE2162363A1 (de) 1971-12-16 1971-12-16 Anordnung zum einstellen des luftspaltes an einem elektromagnetischen schaltgeraet

Publications (1)

Publication Number Publication Date
US3792393A true US3792393A (en) 1974-02-12

Family

ID=5828129

Family Applications (1)

Application Number Title Priority Date Filing Date
US00314563A Expired - Lifetime US3792393A (en) 1971-12-16 1972-12-13 Arrangement for adjusting the air gap in an electromagnetic switching apparatus

Country Status (10)

Country Link
US (1) US3792393A (de)
JP (2) JPS4865464A (de)
AT (1) AT319376B (de)
BR (1) BR7208782D0 (de)
CH (1) CH552277A (de)
DE (1) DE2162363A1 (de)
ES (1) ES409633A1 (de)
FR (1) FR2163731A1 (de)
GB (1) GB1410246A (de)
IT (1) IT971600B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050201881A1 (en) * 2004-03-11 2005-09-15 Gardner Denver, Inc. Self-tightening cover for pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2876429A (en) * 1955-12-07 1959-03-03 Noztitz Roberto Theft-proof circuit for automotive vehicles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2876429A (en) * 1955-12-07 1959-03-03 Noztitz Roberto Theft-proof circuit for automotive vehicles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050201881A1 (en) * 2004-03-11 2005-09-15 Gardner Denver, Inc. Self-tightening cover for pump
US7506574B2 (en) * 2004-03-11 2009-03-24 Gardner Denver, Inc. Self-tightening cover for pump
US20090172944A1 (en) * 2004-03-11 2009-07-09 Jensen Ernest J Self-tightening cover for pump
US7984671B2 (en) 2004-03-11 2011-07-26 Gardner Denver, Inc. Self-tightening cover for pump

Also Published As

Publication number Publication date
FR2163731A1 (de) 1973-07-27
CH552277A (de) 1974-07-31
JPS5525476Y2 (de) 1980-06-19
AT319376B (de) 1974-12-27
GB1410246A (en) 1975-10-15
ES409633A1 (es) 1975-11-16
BR7208782D0 (pt) 1973-09-25
JPS4865464A (de) 1973-09-08
DE2162363A1 (de) 1973-06-20
JPS5445373U (de) 1979-03-29
IT971600B (it) 1974-05-10

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