VIBRATOR DEVICE DRIVEN BY AT LEAST ONE IMBALANCE GENERATOR

• US 3,583,246 A
• Filed: 10/02/1969
• Issued: 06/08/1971
• Est. Priority Date: 10/02/1968
• Status: Expired due to Term

• Current Assignee: Ruckert Friedrich, Stahle Eugen, Walter Harlin
• Original Assignee: Ruckert Friedrich, Stahle Eugen, Walter Harlin
• Inventors: STAHLE EUGEN, Harlin, Walter, RUCKERT FRIEDRICH
• Application Number:
  US04/863,282
• Time in Patent Office: 614 Days
• US Class Current: 74/61
• CPC Class Codes: B06B 1/14 the masses being elastically coupled
• CPC Class Codes: B06B 1/166 Where the phase-angle of masses mounted on counter-rotating shafts can be varied, e.g. variation of the vibration phase
• CPC Class Codes: B65G 27/16 of vibrators, i.e. devices for producing movements of high frequency and small amplitude
• CPC Class Codes: B65G 27/30 by means of an oppositely-moving mass, e.g. a second conveyor
• CPC Class Codes: Y10T 74/18344 Unbalanced weights

Abstract

A vibrator device having a housing with a centrally apertured base, two vibrator plates disposed at either side of said base and held and guided in parallel relationship with one another and said base by means of threaded bolts, opposingly working coil springs fitted between said vibrator plates and either side of said base, an imbalance generator fixedly held by one of said vibrator plates and extending through said opening in said base; the distance between said vibrator plates is adjustable by nuts threadedly secured to said bolts.

Claims

1. In a vibrator device of the type driven by at least one imbalance generator and secured to an apparatus to be vibrated, the effective mass of the latter being connected to a free mass by opposingly working preloaded springs disposed between two spring supports, said free mass includes said imbalance generator, the preload of said springs being variable by changing the distance between said supports, the improvement comprising, A. a housing disconnectably affixed to said effective mass and including a base having opposed faces, B. first and second vibrator plates disposed parallel to one another adjacent to, and spaced from the opposed faces of said base and constituting said supports and forming part of said free mass, said at least one imbalance generator being affixed to said first vibrator plate, C. at least one bolt passing through said base and connecting said vibrator plates with one another and adjustably determining the distance therebetween and permitting displacement thereof towards said base, said bolt forming part of said free mass, and D. at least one spring pair consisting of a first and second individual spring, said first individual spring being fitted in a preloaded condition between one face of said base and said first vibrator plate, urging the latter away from said base, said first vibrator plate, urging the latter away from said base, said second individual spring being fitted in a preloaded condition between the outer face of said base and said second vibrator plate, urging the latter away from said base, the center of gravity of said vibrator device being disposed approximately in a medial plane extending between said first and said second individual spring.

2. An improvement as defined in claim 1, wherein said base is provided with an opening and said at least one imbalance generator is disposed between said vibrator plates extending through said opening.

3. An improvement as defined in claim 2, wherein the imbalance generators are two in number and each includes a drive shaft, said imbalance generators are So disposed that their drive shafts are parallel to one another, said second vibrator plate includes an outwardly bulging portion to accommodate parts of said imbalance generators.

4. An improvement as defined in claim 3, wherein said vibrator plates are rectangular;

said drive shafts extend parallel to the longer sides of said vibrator plates.

5. An improvement as defined in claim 3, wherein each imbalance generator includes flywheel discs secured to said drive shaft, said flywheel discs are disposed adjacent, and have a mass substantially equal to the imbalancing weights of each said imbalance generator.

6. An improvement as defined in claim 3, including two gears, one keyed to the drive shaft of each imbalance generator, two intermediate gears meshing with one another and with the first named gears, bearing plate carrying said intermediate gears and secured to said first vibrator plate.

7. An improvement as defined in claim 1, including at least one nut having a centering face and threadedly received by said bolt, a bore in one of said vibrator plates adapted to slidably receive said bolt, a countersunk portion provided in said bore and having a face complemental with said centering face, the last named two faces are in engagement with one another.

8. An improvement as defined in claim 1, wherein said individual springs are short coil springs having 2-5 turns.

9. An improvement as defined in claim 1, wherein said individual springs are coil springs, the pitch of at least one of them varies uniformly from turn to turn.

10. An improvement as defined in claim 9, wherein the uniform variation of said pitch is approximately 15 percent of the wire thickness of the individual spring.

11. An improvement as defined in claim 1, wherein said individual springs are coil springs, the pitch of at least one of them increases from one end of the spring to the other end thereof.

12. An improvement as defined in claim 1, wherein said individual springs are coil springs, the pitch of at least one of them increases from both ends to the middle thereof.

13. An improvement as defined in claim 1, wherein said individual springs are coil springs;

said opposed faces of said base, and said first and second vibrator plates are provided with centering projections each surrounded by at least the terminal turns of each spring to prevent displacement of the latter with respect to one another.

14. An improvement as defined in claim 1, wherein said spring pairs are at least two in number and are disposed in symmetrical arrangement at either side of said at least one imbalance generator.

15. An improvement as defined in claim 1, wherein said opposingly working preloaded springs have progressive characteristics.

16. An improvement as defined in claim 1, wherein said opposingly working preloaded springs have degressive characteristics.