US3764834A - Electromagnetic vibrator - Google Patents

Electromagnetic vibrator Download PDF

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Publication number
US3764834A
US3764834A US00189233A US3764834DA US3764834A US 3764834 A US3764834 A US 3764834A US 00189233 A US00189233 A US 00189233A US 3764834D A US3764834D A US 3764834DA US 3764834 A US3764834 A US 3764834A
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United States
Prior art keywords
mass
leaf spring
vibrator
recess
spring packet
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
US00189233A
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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
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Transformatoren Union AG
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Publication date
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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
    • H02K33/04—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 wherein the frequency of operation is determined by the frequency of uninterrupted AC energisation

Definitions

  • h vibrator includes further at least one leaf spring v s v s e a I s 1 e s v s 1 e s 1 s s 1 s n [5 1 [EL k tensions for fastening ends of the at least one leaf Fleld of Search 17, 29, p g packet MeanS are provided for p i g the central portion of the at least one leaf spring [56] References cued packet to a second mass.
  • This invention relates to an electromagnetic vibrator in the form of a dual mass vibratory system.
  • the invention relates to an electromagnetic vibrator in'the form of a dual mass vibratory system using leaf springs as spring elements.
  • an electromagnetic vibrator in the form of a dual mass vibratory system including a first mass in the form of a base having a central recess, the base including at least two extensions extending substantially parallel to the vibratory axis of the vibrator.
  • a magnetic system is positioned within the recess.
  • the vibrator includes additionally a leaf spring packet and rigid thread means associated with the two extensions for fastening ends of the leaf spring packet.
  • a second mass is rigidly coupled by conventional means to the central portion of the leaf spring packet.
  • the first mass is preferably the operating mass and is designed as a base, more or less in the form of a plate, having a central recess to hold the magnetic system.
  • the extensions which extend substantially parallel to the vibration axis of the vibrator, contain at least two rigid threads which serve to fasten the ends of a leaf spring packet.
  • the central portion of the leaf spring packet is rigidly coupled with the second mass.
  • the magnetic system is designed as a C-core and mounted in the recess of the base. Particularly when this magnetic system is rigidly connected with the base by means of a cast resin and the recess is fully filled with a solid mass, extraordinary rigidity is obtained which can even be augmented further by reinforcing ribs leading to the extensions for fastening the leaf spring packet.
  • FIG. 1 is a sectional view of an electromagnetic vibrator in the form of a dual mass vibratory system according to the present invention.
  • FIG. 2 is a sectional view of a second embodiment of an electromagnetic vibratory system according to the present invention which has a higher vibrating frequency than the embodiment illustrated in FIG. 1.
  • the electromagnetic vibrator includes a base 10, more or less in the form of a plate, which includes a first mass illustrated as a working mass in accordance with a preferred embodiment.
  • the base 10 is provided on the right and left with rigid cast extensions 11 which are stiffened by ribs 12.
  • Each of the extensions 11 is provided with a threaded bore, generally designated by the numeral 13.
  • a recess 14 is provided in the base 10 for accommodating a magnetic system which comprises a C-shaped core 15 and a winding 16. As illustrated, the C-shaped core 15 and the winding 16 are encased in cast resin.
  • a leaf spring packet including a plurality of leaf springs 17 separated from one another by specific, highly stressable intermediate layers 18, is fixed at its ends to the extensions 11 by high-tensile bolts 19 (expansion screws) which extend into the threaded bores 13.
  • the intermediate layers 18 may desirably have inwardly prepressed contacting edges.
  • the intermediate layers 18 may be of conventional material.
  • the central portion of the leaf spring packet including the leaf springs 17 and the intermediate layers 18, is connected by conventional means to a second mass 20 which is separated from the C-shaped core 15 by an air gap and acts as an armature.
  • Center clamping of the leaf spring packet including the leaf springs 17 and the intermediate layers 18 is effected by bolts 21 which extend through a free side member 22.
  • additional weights generally designated by the numeral 23, may be fixed to the side member 22 by bolts 24 which extend through a plate 25, the plate 25 forming part of the additional weights.
  • the base 10 is provided with an indent or groove 26 extending around a surface in its periphery.
  • a protective hood 27 having a sealof profiled material 28 is positioned over the structure, the profiled material 28 being seated in the indent or groove 26.
  • the protective hood is provided with step-like indentations 29 for seating annular screws 30 which are provided to hold the protective hood 27 in place.
  • the annular screws 30 are provided with free ends 31 of O-shape which may be used for transportation purposes.
  • FIG. 2 of the drawings The embodiment of the invention illustrated in FIG. 2 of the drawings is constructed and operates similarly to the embodiment of the invention shown in FIG. 1 of the drawings.
  • the prime numerals used in FIG. 2 designate parts corresponding to parts designated by corresponding numerals used in FIG. 1 without a prime sign. Thus, it is not necessary to describe FIG. 2 of the drawing in detail.
  • the electromagnetic vibrator in the form of a dual masssystem as illustrated in FIG. 2 is provided. with an air gap between a C-core and a second mass which is somewhat less than the air gap between the C-. core 15 and mass 20 shown in FIG. 1 Additionally, the leaf spring packet composed of a plurality of leaf springs 17 and intermediate layers 18' is not as thick as the corresponding leaf spring packet shown in FIG. 1. As a consequence of these differences (smaller air gap and less total spring tension), the electromagnetic vibrator shown in FIG. 2 operates at a higher frequency (50 Hz) than the frequency Hz) at which the vibrator shown in FIG. 1 operates.
  • weights 23 While no additional weights, corresponding to weights 23, are illustrated in FIG. 2 of the drawing, it is to be appreciated that such weights could be placed between the plate 25' and the side member 22' if desired for frequency tuning.
  • the vibrator according to the present invention With the configuration of the vibrator according to the present invention not only the desired rigidity is obtained for the clamping points of the leaf springs but also a simplification and reduction of cost of the fabrication is effected.
  • the heat removal is substantially improved since the entire vibrator operating side acts as a reflecting surface, on the one hand, and, on the other hand, heat can be conducted via the vibrator mounting feet to a connecting block of the conveyor trough or the like. This permits substantially better utilization of the active material.
  • an electromagnetic vibrator having a vibrating axis and constructed in the form of a dual mass vibratory system
  • the improvement comprising in combination: a first mass in the form of a base having a central recess, said base including at least two stiff, rigid extensions extending substantially parallel to the vibration axis of the vibrator and having respective threaded bores therein; radially extending external ribs stiffening said extensions, resulting in a progressive spring rate; a magnetic system within said recess; at least one leaf spring packet composed of a plurality of individual springs and thin, relatively narrow, highly stressable intermediate layers having inwardly prepressed contacting edges, said layers being disposed between said springs; respective rigid threaded, high-tensile expansion screw bolts positioned in said respective bores of said extensions and extending through respective end portions of said at least one leaf spring packet for rigidly and securely fastening ends of said at least one leaf spring packet against tension forces; a second mass; and means for rigidly coupling said second mass to the central portion of said at least one

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Jigging Conveyors (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
US00189233A 1970-10-15 1971-10-14 Electromagnetic vibrator Expired - Lifetime US3764834A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702050647 DE2050647A1 (de) 1970-10-15 1970-10-15 Elektromagnetischer Vibrator

Publications (1)

Publication Number Publication Date
US3764834A true US3764834A (en) 1973-10-09

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Application Number Title Priority Date Filing Date
US00189233A Expired - Lifetime US3764834A (en) 1970-10-15 1971-10-14 Electromagnetic vibrator

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US (1) US3764834A (enExample)
AT (1) AT313420B (enExample)
DE (1) DE2050647A1 (enExample)
FR (1) FR2111454A5 (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908138A (en) * 1974-04-08 1975-09-23 Dresser Ind Stator core and armature core for a vibrating motor
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
EP0488005A3 (en) * 1990-11-29 1993-01-20 Licentia Patent-Verwaltungs-Gmbh Electromagnetic vibration generator
US5444313A (en) * 1992-05-04 1995-08-22 Moving Magnet Technologies S.A. Electromagnetic actuator having two opposite phase movable parts
USD726795S1 (en) * 2012-12-14 2015-04-14 Tang Band Industries Co., Ltd. Vibrating module for electromagnetic vibrator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB520680A (en) * 1937-08-19 1940-05-01 Gustave Nahman Improvements in or relating to electro-magnetic motors with reciprocating movement
US2694156A (en) * 1951-01-09 1954-11-09 Syntron Co Tuning of vibratory systems
US3155853A (en) * 1960-12-30 1964-11-03 Link Belt Co Aluminum leaf spring spacer
US3167670A (en) * 1962-12-26 1965-01-26 Link Belt Co Electromagnetic vibrators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB520680A (en) * 1937-08-19 1940-05-01 Gustave Nahman Improvements in or relating to electro-magnetic motors with reciprocating movement
US2694156A (en) * 1951-01-09 1954-11-09 Syntron Co Tuning of vibratory systems
US3155853A (en) * 1960-12-30 1964-11-03 Link Belt Co Aluminum leaf spring spacer
US3167670A (en) * 1962-12-26 1965-01-26 Link Belt Co Electromagnetic vibrators

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908138A (en) * 1974-04-08 1975-09-23 Dresser Ind Stator core and armature core for a vibrating motor
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
EP0488005A3 (en) * 1990-11-29 1993-01-20 Licentia Patent-Verwaltungs-Gmbh Electromagnetic vibration generator
US5406152A (en) * 1990-11-29 1995-04-11 Licentia Patent-Verwaltungs-Gmbh Electromagnetic vibration generator
US5444313A (en) * 1992-05-04 1995-08-22 Moving Magnet Technologies S.A. Electromagnetic actuator having two opposite phase movable parts
USD726795S1 (en) * 2012-12-14 2015-04-14 Tang Band Industries Co., Ltd. Vibrating module for electromagnetic vibrator

Also Published As

Publication number Publication date
FR2111454A5 (enExample) 1972-06-02
AT313420B (de) 1974-02-25
DE2050647A1 (de) 1972-05-31

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