US3775625A - Electromagnetic vibrator - Google Patents

Electromagnetic vibrator Download PDF

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Publication number
US3775625A
US3775625A US00303823A US3775625DA US3775625A US 3775625 A US3775625 A US 3775625A US 00303823 A US00303823 A US 00303823A US 3775625D A US3775625D A US 3775625DA US 3775625 A US3775625 A US 3775625A
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US
United States
Prior art keywords
armature
mass
vibrator
electromagnetic vibrator
coupling
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
US00303823A
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English (en)
Inventor
L Brosch
G Fechner
E Reichert
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.)
Transformatoren Union AG
Original Assignee
Transformatoren Union AG
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
Priority claimed from DE19691957585 external-priority patent/DE1957585C3/de
Application filed by Transformatoren Union AG filed Critical Transformatoren Union AG
Application granted granted Critical
Publication of US3775625A publication Critical patent/US3775625A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs

Definitions

  • ABSTRACT An electromagnetic vibrator wherein the armature is coupled to and supported on its associated mass by means of an adjustable coupling arrangement so that the armature and its mass are spaced from one another.
  • a central disc spring element is arranged beally provided on the mass for positioning the spring or springs.
  • the vibrator drive In each one of the known constructions described above the vibrator drive must always be de-energized when'the air gap is to be adjusted, because only in the rest state can the clampingelements be handled.
  • the air gap adjustment thus constitutes a time-consuming testing, or trial-and-error procedure, until the optimum setting has been found.
  • FIGS. 5a and 5b show an embodiment of the present invention in which a large, centrally located disc spring 3, constructed from a suitable, known material, is inserted between the four setting bolts 4 arranged in the four corners of the armature coupling piece 1 of the free mass of the-vibrator and an armature 2 to hold together the coupling piece 1 and the armature 2.
  • two disc springs 3 can be disposed, as shown in FIG. 6, in an opposed relationship; for example, in series. If the spring force is insufficient for example, if natural vibrations develop between the free mass 1 and the armature 2 two or moredisc springs may be connected in the same direction; that is, in parallel.
  • FIG. 7 shows a pair of two parallel connected disc springs arranged in series.
  • FIGS. 6,6',6 As a guide for one or a plurality of springs, a central cylindrical guide 6,6',6" protrudes from the coupling piece 1 (FIGS. 5,6 and 7).
  • the embodiments of FIGS. 6 and 7 have a corresponding recess 7 disposed in the armature 2 opposite this guide so that the guide can move into this recess when the springs are pressed together.
  • FIG. 9 there is shown an emboditending arms 16. Fastened to the top of these arms 16 by means of bolts 17 are the respective ends of the leaf springs 18 which provide the vibratory motion of the vibrator.
  • the freemass of the vibrator which includes a 5 weight portion 20 and the armature coupling piece 1,
  • a single cup spring 3 is clamped between I the armature coupling piece 1 and the core armature 2.
  • the degree of pretensioning or'biasing force exerted by the spring 3 is determined 'by the setting of the screws 4 by means. ofwhich the air space 21 between the armature coupling piece 1 and the armature 2 can be adjusted. Adjusting the air space 22 simultaneously adjusts and sets the operating air gap 22 between the I armature 2 and the pole surfaces of the open core. 12.
  • FIG. 10 illustrates the armature mounting arrangement according to the present invention whereby the operational air gap may be set by means of a cup spring 3 for a vibrator employing helical springs 23 for providing the vibrator motion.
  • the edge of the weight portion 20 of the free mass serves'as an abutment for the helical springs 23 and the free mass is guided at each end by a long continuous bolt 24 which is fastened to the supporting frame or base 11.
  • the present invention permits the continuous setting of the desired operating air gap without any complicated installation work.- That is with the arrangement of the present invention, the operating air gap 22 can be adjusted merely by tightening bolt 4 evenduring operation, so that the field test operations require only a fraction of the time required for the known methods. Moreover, since the adjustment of the air gap is accomplished solely by adjusting the position of the armature 2 relative tothe coupling piece 1 of the free mass, the pretensioning of the operating springs required for the vibration, i.e.,' the springs 18 or 23, is in no way effected by the setting of the air gap.
  • bolts 4 remain in the set position and can not yield during operation. If the thread bores for holding the bolts-4 are directly placed in a known laminated armature, the seat for the bolts is naturally extremely tight. A further improvement is realized when oversize bolts are used, for example with a particularly heavy, known, electrolytic protective coating.
  • further thread bores which are arranged transverse to the first thread bores, such as shown in FIGS. 6 and 7 and designated by the reference numeral 5, can be provided with which the sheets of a laminated armature 2 (laminations not shown) are clamped together, thus clamping in setting bolts 4.
  • the laminations are, of course, parallel to the plane of the paper in FIGS. 6 and '7.
  • a centrallylocated disc spring means arranged between said armature and said associated mass and exerting a sufficient force for biasing said armature and associated mass so that, in cooperation with '5 said'adjustable coupling means, a desired airi space setting is maintained between saidarmature and said associated mass and said armature and said associated mass-move as a unit during vibration of the vibrator, whereby by adjustingsaid coupling means, said airspace and consequently the operational air gap of said vibrator adjacent said armature is adjusted without affecting the vibrating i wherein one of said armature and said associated mass defines a guide means for said spring means.
  • Man electromagnetic vibrator including a magnetic armature mounted for vibratory movement relative to a magnetic core, and a free mass associated with said armature, the improvement comprising:
  • said adjustable coupling means comprises an armature coupling piece which forms part of said mass and which extends parallel to the plane of said armature, and a plurality of bolts extending through openings in said coupling piece and threadingly engaging said armature.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
US00303823A 1969-11-15 1972-11-06 Electromagnetic vibrator Expired - Lifetime US3775625A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691957585 DE1957585C3 (de) 1969-11-15 Elektromagnetischer Vibrator

Publications (1)

Publication Number Publication Date
US3775625A true US3775625A (en) 1973-11-27

Family

ID=5751247

Family Applications (1)

Application Number Title Priority Date Filing Date
US00303823A Expired - Lifetime US3775625A (en) 1969-11-15 1972-11-06 Electromagnetic vibrator

Country Status (3)

Country Link
US (1) US3775625A (de)
AT (1) AT308633B (de)
FR (1) FR2069438A5 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455496A (en) * 1982-02-25 1984-06-19 Fmc Corporation Electromagnetic vibratory exciter
US4733966A (en) * 1986-04-01 1988-03-29 Litton Systems, Inc. Tuning mechanism for dither frequencies in a ring laser gyroscope
US4749891A (en) * 1985-04-01 1988-06-07 Sheng Cao P Non-linear electromagnetic vibration device
US6388417B1 (en) * 1999-12-06 2002-05-14 Macrosonix Corporation High stability dynamic force motor
US20090096299A1 (en) * 2007-10-11 2009-04-16 Citizen Electronics Co., Ltd. Electromagnetic exciter and manufacturing method therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1228480B (it) * 1989-01-18 1991-06-19 I T S International Technical Apparecchio vibratore elettromagnetico con reazione elastica regolabile

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107905A (en) * 1960-10-19 1963-10-22 Charles D Lucas Belleville spring elastic suspension
US3167670A (en) * 1962-12-26 1965-01-26 Link Belt Co Electromagnetic vibrators
US3170078A (en) * 1960-04-12 1965-02-16 Pvg Patent Verwaltungs Ges M B Vibratory drive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170078A (en) * 1960-04-12 1965-02-16 Pvg Patent Verwaltungs Ges M B Vibratory drive
US3107905A (en) * 1960-10-19 1963-10-22 Charles D Lucas Belleville spring elastic suspension
US3167670A (en) * 1962-12-26 1965-01-26 Link Belt Co Electromagnetic vibrators

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455496A (en) * 1982-02-25 1984-06-19 Fmc Corporation Electromagnetic vibratory exciter
US4749891A (en) * 1985-04-01 1988-06-07 Sheng Cao P Non-linear electromagnetic vibration device
US4733966A (en) * 1986-04-01 1988-03-29 Litton Systems, Inc. Tuning mechanism for dither frequencies in a ring laser gyroscope
US6388417B1 (en) * 1999-12-06 2002-05-14 Macrosonix Corporation High stability dynamic force motor
US20090096299A1 (en) * 2007-10-11 2009-04-16 Citizen Electronics Co., Ltd. Electromagnetic exciter and manufacturing method therefor

Also Published As

Publication number Publication date
AT308633B (de) 1973-07-10
DE1957585B2 (de) 1977-06-23
FR2069438A5 (de) 1971-09-03
DE1957585A1 (de) 1971-05-27

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