Non-linear electromagnetic vibration device

• US 4,749,891 A
• Filed: 03/12/1986
• Issued: 06/07/1988
• Est. Priority Date: 04/01/1985
• Status: Expired due to Fees

• Current Assignee: Cao P. Sheng
• Original Assignee: Cao P. Sheng
• Inventors: Sheng, Cao P.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/838,985
• Time in Patent Office: 818 Days
• Field of Search: 310/15, 310/27, 310/28, 310/29, 310/30, 310/33, 310/22
• US Class Current: 310/15
• CPC Class Codes: B07B 1/40 Resonant vibration screens
• CPC Class Codes: B07B 1/42 Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
• CPC Class Codes: B07B 1/46 Constructional details of screens in general; Cleaning or heating of screens
• CPC Class Codes: B28D 1/265 Scabbling machines or scabbling tools
• CPC Class Codes: F04B 17/042 the solenoid motor being separated from the fluid flow
• CPC Class Codes: H02K 33/02 with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs

Abstract

A non-linear electromagnetic vibration device including a first vibration part and a second vibration part. A non-linear bellows plate spring set is connected between the first and second vibrating parts. Each spring set is composed of sequentially coupled bellows plate springs, and each plate spring is elastic according to a predetermined particular waveform and has a plate structure of a predetermined shape. The waveform is selectable among many including portions of an exponential curve. The plate structure of each spring is rectangular with an edge which is straight, convex, or concave in contour. The first vibration part of the device is rigidly connected to a corresponding section of each spring set and the second vibration part of the device is coupled to a different or second area of each spring set. An electromagnetic core and armature of an electromagnetic source and respectively included in a different one of said first and second vibration parts, and stable reciprocating structural components each of a parallelogram shaped configuration are formed. Harmonic resonance frequency conversion can be obtained conveniently via mechanical adjustment of the number of plate springs in each sectionalized waveform plate spring set.

Claims

1. A non-linear electromagnetic vibration device comprising:

a first vibrating part including,

a base,

at least a first end unit connected to said base,

an armature connected at one end to said end unit, and

an electromagnetic coil mounted about said armature;

a second vibrating part including,

a generally U-shaped electromagnetic core mounted about said armature and said coil, a free end portion of said armature extends into said generally U-shaped electromagnetic core to a posture wherein the free end of the armature is adjacent to but spaced from a base portion of said generally U-shaped electromagnetic core;

means for operably connecting said first vibrating part to said second vibrating part to permit relative motion between said first vibrating part and said second vibrating part;

said means for operably connecting said first and second vibrating parts including,

at least a first generally rectangular, non-linear, bellows plate spring wherein one portion of said spring is rigidly affixed to said first vibrating part and another portion of said spring is rigidly affixed to said second vibrating part; and

electrical power means connected to said electromagnetic coil for supplying electrical current pulses to said coil and electromagnetically inducing movement of said armature within said core in opposition to a non-linear restoring spring force of said at least one generally rectangular, non-linear bellows plate spring operably extending between said first vibrating part and said second vibrating part, whereby a resonant, non-linear electromagnetic vibration may be induced between said first vibrating part and said second vibrating part.

2. A non-linear electromagnetic vibration device as defined in claim 1 wherein said at least one generally rectangular, non-linear bellows plate spring comprises:

a sectionalized member having, first and second lateral edge portions and at least one aperture through each edge portion and being operably bolted to said generally U-shaped electromagnetic core;

a central portion having at least one aperture and being operably bolted to said armature, and

a plurality of mutually parallel, waveforms in said bellows plate spring between said central portion and said first lateral edge portion and between said central portion and said second lateral edge portion and extending normal to said base, and

parallel with said first and second lateral edge portions and said central portion.

3. A non-linear electromagnetic vibration device as defined in claim 2 wherein said at least a first generally rectangular, non-linear, bellows plate spring comprises:

5. A non-linear electromagnetic vibration device as defined in claim 3 wherein:

said bellows plate spring set comprising a non-linear vibrating element is composed of at least two different types of waveform plate springs selected from the group consisting of cross-section curves substantially as shown in FIGS. 9A through 9E.

6. A non-linear electromagnetic vibration device as defined in claim 3 wherein:

each bellows type plate spring piece has a thickness of from 0.3 to 1.5 millimeters.

7. A non-linear electromagnetic vibration device as defined in claim 3 and further comprising:

a plurality of generally rectangular, non-linear bellows, plate spring sets extending between said first vibrating part and said second vibrating part.

8. A non-linear electromagnetic vibration device as defined in claim 6, wherein

the number of plate springs in each said generally rectangular, non-linear bellows plate spring sets equals the square of an integral (n) times of a number predeterminably required therein for the vibration device to achieve harmonic resonance.

9. A non-linear electromagnetic vibration device as defined in claim 6, wherein

the number of plate springs in each said generally rectangular, non-linear bellows plate spring sets equals the square of an inverse integral (1/n) times of a number predeterminably required therein for the vibration device to achieve harmonic resonance.

10. A non-linear electromagnetic vibration device as defined in claim 1 and further comprising:

an adjustment bolt for selectively varying the space between the free end of said armature and the base portion of said generally U-shaped electromagnetic core having a first portion with threads of one pitch operably engaged with said armature and a second portion with threads of a different pitch operably engaged with said electromagnetic core wherein rotation of said adjustment bolt operably adjusts said armature with respect to said electromagnetic core.

11. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

at least a top edge of said generally rectangular, non-linear, bellows plate spring is linear.

12. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

at least a top edge of said generally rectangular, non-linear, bellows plate spring is concave.

13. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

at least a top edge of said generally rectangular, non-linear, bellows plate spring is convex.

14. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

said armature comprises a generally T-shaped configuration and the length of a leg element of the T-shaped armature is such that the gap between the free end of the leg element of the armature with respect to the base portion of the U-shaped electromagnetic core is equal to a gap that exists between the arm portions of the T-shaped armature and end most leg portions of the U-shaped electromagnetic core.

15. A non-linear electromagnetic vibration device as defined in claim 13 wherein said first vibrating part further includes:

a second end unit connected to said base and extending adjacent to but spaced from the exterior of said electromagnetic core, said second end unit being in alignment with said first end unit; and

means for operably connecting said armature of said second end unit.

16. A non-linear electromagnetic vibration device as defined in claim 13 wherein said second vibrating part further includes:

a first side plate connected to a lateral surface of one arm of said generally U-shaped electromagnetic core;

a second side plate connected to the other arm of said generally U-shaped electromagnetic core; and

said means for operably connecting said first vibrating part to said second vibrating part comprises,

at least one first generally rectangular, non-linear bellows, plate spring having lateral edges rigidly affixed to one of the ends of each of said first and second side plates and a central portion rigidly affixed to said first end unit, and

at least one second generally rectangular, non-linear bellows, plate spring having lateral edges rigidly affixed to the other of the ends of each of said first and second side plates and a central portion rigidly affixed to said second end unit.

17. A non-linear electromagnetic vibration device as defined in claim 15 wherein said second vibrating part further comprises:

at least a first mass operably connected between one of the ends of said first and second side plates.

18. A non-linear electromagnetic vibration device as defined in claim 16 and further comprising:

at least a second mass operably connected between the other of the ends of said first and second side plates.

19. A non-linear electromagnetic vibration device as defined in claim 17 and further comprising:

first locking means between said first side plate and said electromagnetic core; and

second locking means between said second side plate and said electromagnetic core, said first and second locking means being operably to release said first and second side plates from said electromagnetic core during periods of adjustment of said adjustment bolt and to unit said members rigidly together following adjustment.

20. A non-linear electromagnetic vibration device as defined in claim 15 wherein said at least one first generally rectangular, non-linear waveform plate spring and said at least one second generally rectangular, non-linear waveform plate spring each comprise:

a plurality of generally rectangular, non-linear bellows plate springs which are stacked together but spaced apart into a mutually parallel array of generally rectangular, non-linear waveform plate spring sets.

21. A non-linear electromagnetic vibration device as defined in claim 19 and further comprising:

means for selectively varying the space between the free end of said armature and the base portion of said generally U-shaped electromagnetic core.

22. A non-linear electromagnetic vibration device as defined in claim 15 wherein:

said first side plate, said armature and corresponding portions of said first and second generally rectangular, non-linear bellows, plate spring forms a first parallelogram configuration and said second side plate, said armature and corresponding portions of said first and second generally rectangular, non-linear bellows plate spring forms a second parallelogram configuration, both of said first and second parallelogram configurations having a common central leg and moving in balanced motion without lateral restraint.

23. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

means for varying the amplitude of vibration of said non-linear electromagnetic vibration device by increasing the voltage of said electrical power means.

24. A non-linear electromagnetic vibration device as defined in claim 1 and further comprising:

another non-linear electromagnetic vibration device as recited in claim 1;

both of said non-linear electromagnetic vibration devices being connected to the same power source and arranged in cooperative push-pull parallel to a member for achieving push-pull resonance vibration of said member.

25. A non-linear electromagnetic vibration device as defined in claim 1 and further comprising:

a sieve frame;

a sieve;

non-linear spring means connected between said sieve and said sieve frame; and

one of said first vibrating part and said second vibrating part being connected to said sieve to vibrate said sieve with a resonate, non-linear electromagnetic vibration.

26. A non-linear electromagnetic vibration device as defined in claim 24 wherein said non-linear spring means connected between said sieve and said sieve frame comprises:

at least one-linear bellows plate spring set.

27. A non-linear electromagnetic vibration device as defined in claim 1 and further comprising:

a carrying base;

a chiseling and cutting head;

non-linear spring means connected between said carrying base and said chiseling and cutting head; and

one of said first vibrating part and said second vibrating part being connected to said chiseling and cutting head to vibrate said chiseling and cutting head with a resonate, non-linear electromagnetic vibration.

28. A non-linear electromagnetic vibration device as defined in claim 26 wherein said non-linear spring means connected between said carrying base and said chiseling and cutting head comprises:

at least one non-linear bellows plate spring set.

29. A non-linear electromagnetic vibration device as defined in claim 1 and further comprising:

a working base plate for vibrating concrete or the like; and

non-linear springs operably connecting one of said first vibrating part and said second vibrating part to said working base plate to vibrate said working base plate with a resonate, non-linear electromagnetic vibration.

30. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

the cross-section of said bellows plate spring comprising a non-linear vibrating element corresponds, at least in part to a sine curve.

31. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

said bellows plate spring, comprising a non-linear vibrating element, has a cross-section substantially as shown in FIG. 9A.

32. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

said bellows plate spring, comprising a non-linear vibrating element, has a cross-section substantially as shown in FIG. 9B.

33. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

said bellows plate spring, comprising a non-linear vibrating element, has a cross-section substantially as shown in FIG. 9C.

34. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

said bellows plate spring, comprising a non-linear vibrating element, has a cross-section substantially as shown in FIG. 9D.

35. A non-linear electromagnetic vibration device as defined in claim 1 wherein:

said bellows plate spring, comprising a non-linear vibrating element has a cross-section substantially as shown in FIG. 9E.

37. A non-linear electromagnetic vibration device as defined in claim 35 wherein said second vibrating part further includes:

a first side plate connected to said base and to a lateral surface of one arm of said generally U-shaped electromagnetic core;

a second side plate connected to said base and to the other arm of said generally U-shaped electromagnetic core; and

said at least a first generally rectangular, non-linear bellows, plate spring has lateral edges rigidly bolted to one of the ends of each of said first and second side plates and a central portion rigidly bolted to said first end unit.

39. A non-linear electromagnetic vibration device as defined in claim 37 wherein said first vibrating part further includes:

a second end unit connected to said base and extending adjacent to but spaced from the exterior of said electromagnetic core said second end unit being in alignment with said first end unit;

means for operably connecting said armature to said second end unit; and

at least one second generally retangular, non-linear bellows, plate spring having lateral edges rigidly bolted to the other of the ends of each of said first and second side plates and a central portion rigidly bolted to said second end unit.

41. A non-linear electromagnetic vibration device as defined in claim 39 and further comprising:

means for selectively varying the space between the free end of said armature and the base portion of said generally U-shaped electromagnetic core.

4. a plurality of generally rectangular, non-linear bellows, plate springs which are stacked together but spaced apart into a mutually parallel array of generally rectangular, non-linear bellows, plate spring sets.

36. A non-linear electromagnetic vibration device comprising:

a first vibrating part including,

a base,

at least a first end unit connected to said base,

an armature connected at one end to said end unit, and

an electromagnetic coil mounted about said armature;

a second vibrating part including,

a base,

a generally U-shaped electromagnetic core mounted about said armature and said coil and operably connected to said base, a free end portion of said armature extends into said generally U-shaped electromagnetic core to a posture wherein the free end of the armature is adjacent to but spaced from a base portion of said generally U-shaped electromagnetic core;

means for operably connecting said first vibrating part to said second vibrating part to permit relative motion between said first vibrating part and said second vibrating part;

said means for operably connecting said first and second vibrating parts including,

at least a first generally rectangular, non-linear, bellows plate spring wherein a central portion of said spring is provided with an aperture and is rigidly bolted to said first vibrating part and edge portions of said spring are each provided with an aperature and are rigidly bolted to said second vibrating part; and

electrical power means connected to said electromagnetic coil for supplying electrical current pulses to said coil and electromagnetically inducing movement of said armature within said core in opposition to a non-linear restoring spring force of said at least one generally rectangular, non-linear bellows plate spring operably extending between said first vibrating part and said second vibrating part, whereby a resonate, non-linear electromagnetic vibration may be induced between said first vibrating part and said second vibrating part.

38. A non-linear electromagnetic vibration device as defined in claim 36 wherein:

said armature comprises a generally T-shaped configuration and the length of a leg element of the T-shaped armature is such that the gap between the free end of the leg element of the armature with respect to the base portion of the U-shaped electromagnetic core is equal to a gap that exists between the arm portions of the T-shaped armature and end most leg portions of the U-shaped electromagnetic core.

40. A non-linear electromagnetic vibration device as defined in claim 38 wherein said at least one first generally rectangular, non-linear waveform plate spring and said at least one second generally rectangular, non-linear waveform plate spring each comprise:

a plurality of generally rectangular, non-linear bellows plate springs which are stacked together but spaced apart into a mutually parallel array of generally rectangular, non-linear waveform plate spring sets.