US3655032A - Vibratory feeder - Google Patents

Vibratory feeder Download PDF

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Publication number
US3655032A
US3655032A US40678A US3655032DA US3655032A US 3655032 A US3655032 A US 3655032A US 40678 A US40678 A US 40678A US 3655032D A US3655032D A US 3655032DA US 3655032 A US3655032 A US 3655032A
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United States
Prior art keywords
bars
bowl
set forth
vibratory
bar
Prior art date
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Expired - Lifetime
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US40678A
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English (en)
Inventor
Grant N Willis
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Arthur G Russell Co Inc
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Arthur G Russell Co Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G27/00—Jigging conveyors
    • B65G27/10—Applications of devices for generating or transmitting jigging movements
    • B65G27/28—Applications of devices for generating or transmitting jigging movements with provision for dynamic balancing
    • B65G27/30—Applications of devices for generating or transmitting jigging movements with provision for dynamic balancing by means of an oppositely-moving mass, e.g. a second conveyor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency

Definitions

  • This invention relates to vibratory feeders and is particularly applicable to vibratory feeders of the bowl type wherein the bowl is formed with a helical ramp on which the parts to be fed travel in response to vibration or oscillation of the bowl.
  • the feeding of parts or other material along the helical ramp of a bowl is accomplished by reciprocating the bowl through a small angle of rotation and at the same time giving the bowl an upward component of movement while it is turned in one direction and a downward component movement during the reverse direction of rotation.
  • Various mechanical arrangements are available for supporting the bowl for such movement and the bowl may be driven mechanically or by electromagnetic or fluid-powered means. The most common arrangement is to support the bowl at its periphery on inclined springs and to drive the bowl in one direction by one or more electromagnets energized by a pulsating electric current.
  • a principal problem encountered in such prior art vibratory feeders is that in order to attain efficient operation and optimum performance, it is necessary to construct the mechanism so that the system is in resonance, i.e., so that the natural frequency of vibration of the bowl is reasonably close to that of the motor means which, in the case of an electromagnetic motor operated from a conventional alternating power source, usually is 60 Hertz or multiples thereof.
  • the effect of proper tuning is readily apparent because of the marked decrease in power which is required to vibrate the bowl, or conversely, if the power remains the same, by the marked increase in amplitude of vibration which occurs.
  • FIG. 2 is an enlarged plan view of the vibratory feeder with a portion of the bowl cut away to show certain of the details of the connecting mechanism;
  • FIG. 1 is a partially exploded perspective view of a vibratory feeder in which the mechanism of the present invention has been embodied and showing the mounting of a conventional cast bowl with a combination spiral-helical ramp;
  • HO. 3 is a fragmentary cross-sectional view taken along line 33 of FIG. 2;
  • FIG. 4 is an enlarged fragmentary cross-sectional view taken along line 4-4 of FIG. 3.
  • the bowl 10 in the embodiment shown in the drawings is a case aluminum bowl of circular configuration having a combinationspiral-helical ramp 11 in its upper surface. As will be understood, the ramp 1] forms the path along which the articles to be fed move in response to vibration of the bowl.
  • the bowl 10 is fastened to a generally triangular mounting plate 12 by means of screws 13 extending through the bottom wall l4.of the bowl l0. Welded at the underside of the mounting plate 12 and also adjacent the apices thereof are mounting brackets 17.
  • the mounting plate 12 and hence the bowl 10 is mounted for vibratory movement on a base 20 which may be a metal casting as disclosed in my prior U.S. Pat. No. 3,048,260 but which in the present embodiment is formed of a single but relatively thick circular steel plate.
  • the base 20 is formed with a rectangular central opening 21 having recessed downwardly facing shoulders 22 and 23 along to opposite edges thereof.
  • the base is provided with a plurality of adjustable feet 24 by means of which the base 20 may be adjustably mounted on a supporting surface.
  • the bowl 10 in the preferred embodiment shown in he drawings is mounted and driven by a plurality of combination supporting and vibratory units 30 of the type disclosed and claimed in my prior U.S. Pat. No. 3,048,260, to which reference may be made for further details if desired.
  • the vibratory units 30 comprise end plates 31 and 32 which are arranged to vibrate relative to each other in parallel paths in the plane of the plates, the end plates 31 and 32 being connected together by a plurality of leaf springs 33 clamped thereto.
  • the end plates 31 and 32 extend generally vertically and the springs 33 extend transversely of the base.
  • Vibrating motion is produced by an internal motor (one shown in phantom at 36 in FlG. 3) which may be of the electromagnetic or fluid-powered type.
  • the end plates 31 of the base units 30 are connected to the mounting brackets 17 by spring straps 34 and the end plates 32 are connected to mounting brackets 35 secured to the upper surface of base 20.
  • Concentric screws 37, 38 connect the end plates 31 to spring straps 34 and end plates 32 to brackets 35, respectively, thus permitting the angular or rotated position of the vibratory units 30 to be adjustably selected.
  • the vibratory units 30 may be connected between the bowl 10 and the base 20 with the mounting brackets 17 radially outward from the mounting brackets 35.
  • the vibratory units 30 could be reversely mounted as shown in my prior U.S. Pat. No. 3,048,260 merely by turning brackets 35 through an angle of and placing the mounting brackets 17 radially inwardly of the mounting plate 12 as indicated in phantom at 17a.
  • the helix angle of the bowl vibration is determined by the rotated or angular position of the vibratory units 30 which can be varied to produce various ratios of vertical to horizontal components of vibration and either clockwise or counterclockwise rotation of articles in the bowl, as desired.
  • an adjustable torsion bar assembly indicated generally at 40 forms an additional connection and supplementary support between the bowl 10 and the base 20.
  • the torsion bar assembly 40 comprises a main or center bar 41 and two parallel side bars 42 and 43 which are integrally joined together by the base portion 44.
  • the center bar 41 is T-shaped in configuration to provide an outwardly extending mounting head portion 46.
  • the three bars are best formed by milling the L-shaped slots 45, 45a in a single rectangular metal plate.
  • torsion bar assembly 40 may be varied depending upon the particular installation, a specific example of such an assembly having general use is one formed by milling three-eighths inch slots in a five-eighths inch steel plate which is 3-% inches wide and -5 4. inches long.
  • the head portion 46 is engaged in a slot 47 formed in a re-enforcing bar 48 welded to the underside of the mounting plate 12 at the center thereof, and the head portion 46 is securely connected thereto by screws 49 whose heads are recessed in openings 50 in the mounting plate 12.
  • the base of the torsion bar 40 is connected by screws 51 to a generally rectangular supporting plate 52 which is secured at its opposite ends by screws 53 to the shoulders 22 and 23 adjacent the central opening 21 of the base. lnasmuch as the upper end of the torsion bar 40 is fixed to the mounting plate 12 and the base portion is securely fixed to the plate 52, it will be appreciated that the vibratory motion and particularly the circular horizontal component thereof will result in a twisting or torsion of the main or center bar 41.
  • the supporting plate 52 is a metal plate having inherent resiliency
  • the vertical component movement of the bowl will be accommodated by vertical flexing of the support plate 52. While it is not intended to limit the invention to any specific dimensions, it may be mentioned by way of specific example, that a oneeighth inch steel plate approximately 3-% inches wide and 6-% inches long is one which in practice has been found to afford the desired flexibility.
  • a pair of clamps 60 and 61 extending across opposite sides of the torsion bar assembly 40 and clamped thereto by screws 62 which are accommodated in the slots 45, 45a.
  • the clamps 60 and 61 are recessed at their inner surfaces as indicated at 63, in order to receive shoes or spacers 64, preferably formed of low friction plastic material such as that sold under the trademark Celcon.
  • clamps 60 and 61 are almost identical except that clamp 61 is formed with beveled corners 65 to avoid interference with the brackets 35 and is provided with a tapped hole 66 having a lefthand thread, whereas the tapped hole 67 in clamp 60 has a righthand thread.
  • Journaled at their lower ends in the supporting plate 52 are two adjusting feed screws 70 and 71 having a righthand thread and a lefthand thread respectively, which are threadably engaged in and extend through the tapped holes 67 and 66 in the clamps 60 and 61 respectively.
  • Fixed on the bottom end of the adjusting feed screw 71 is a gear 72 which meshes with a gear 73 fixed on the bottom end of adjusting feed screw 70.
  • the hub 74 of the gear 73 is milled to form a hexagonal head for receiving a turning tool such as a wrench.
  • the mechanism just described permits the clamps 60 and 61 to be moved upwardly and downwardly as desired while the clamps remain in engagement with the center bar 41 and the two sides bars 42 and 43. It has been found that although the two clamps 60 and 61 are held together with a strong force by the screws 62, nonetheless, the mechanical advantage provided by the feed screws 70, 71 is such that the clamps 60 and 61 can be readily adjusted upwardly and downwardly by a reasonable force applied to the hub 74 by means of a conventional wrench.
  • the portion of the center bar 41 and side bars 42 and 43 below the clamps 60 and 61 will function substantially as a single unitary structure while above the clamps 60 and 61 only the center bar 41 is in torsion. Accordingly, as the clamps 60 and 61 are raised, the torsion bar assembly 40 is increased in stiffness and conversely, when clamps 60 and 61 are lowered, the torsion bar assembly 40 is rendered more flexible. Thus, by turning the feed screws 70, 71 and adjusting the clamps 60, 61 upwardly or downwardly, as desired, the torsional spring rate of the torsion bar assembly 40 can be readily adjusted.
  • the torsion bar assembly 40 Since the torsion bar assembly 40 is connected at opposite ends to the bowl l0 and the base 20, it operates in torsion to absorb and release energy as the bowl is vibrated and its spring rate becomes a major factor in determining the natural frequency of the feeder. As a result, the number and rate of the leaf springs 33 utilized in the vibratory units 30 is rendered relatively unimportant, and thus lighter leaf springs 33 and a fewer number may be used. Also, because the design of the adjustable torsion bar assembly 40 is such that a wide range of spring rates may be attained, a much wider range of bowl weights may be accommodated within usual space limits and relatively lighter base weights are possible while still permitting accurate tuning.
  • tuning of the assembly is infinitely variable between limits rather than incremental as in the tuning of the prior art devices, tuning is rendered more precise and does not require the use of such expedients for final tuning as adding or removing weights from the bowl.
  • the torsion bar assembly 40 may be adjusted simply by turning the feed screws 70, 71 and this can be done while the feeder is in operation, only ordinary skill is required to tune the feeder, since the effect of the adjustment can be directly observed by observing the operation of the feeder while the adjusting is taking place, and no precalculations or cut and try methods are required.
  • a vibratory feeder having a material conveying vibratory element including a bowl, a base element, and means connected between the vibratory element and the base element for reciprocating the vibratory element in a path of movement having a horizontal and a vertical component
  • the improvement comprises vertically extending torsion bar means located centrally of the bowl, first connecting means securing the upper end of the torsion bar means to the vibratory element and second connecting means securing the lower end of the torsion bar means to the base element to cause relative rotation of said ends in response to reciprocal movement of the vibratory element, at least one of said connecting means being yieldable in a vertical direction to accommodate the vertical component of movement of said vibratory element.
  • a vibratory feeder as set forth in claim 1 wherein the torsion bar means comprises a plurality of parallel bars connected together at one end, and a clamp extending across the bars intermediate their ends, said clamp being adjustably mounted for selective positioning lengthwise of the bars.
  • a vibratory feeder as set forth in claim 1 wherein the means for reciprocating the bowl comprises a plurality of spring elements connected at their one ends to the base element and at their other ends to the bowl radially outwardly of the center of the bowl, said spring elements being disposed so that upon flexure of the spring elements, said other ends move in a path inclined to the vertical.
  • a vibratory feeder as set forth in claim 1, wherein the means for reciprocating the bowl comprises a plurality of supporting and vibrating units angularly spaced around the bowl, each of said units comprising a pair of parallel mounting plates, leaf springs secured to and extending between the mounting plates to permit relative oscillatory movement of the plates in generally parallel paths, andmotor means within the unit for oscillating the plates.
  • torsion bar means comprises a first bar connected at opposite ends to the bowl and base element, and at least one additional bar parallel to the first bar having one free end and having its other end connected to one end of the first bar, and a clamp extending across the bars adjustably mounted for selective positioning lengthwise of the bars.
  • torsion bar means comprises a center bar having means at opposite ends for connection to the bowl and base element, andshaped slots forming a center bar with an elongated head portion and a pair of side bars integrally joined to the center bar at its end opposite from the elongated head portion.
  • torsion bar means comprises a first bar connected at its upper end to the bowl, at least one additional bar parallel to the first bar, said bars being mounted at their lower ends on a flexible plate, said plate being attached to the base element, and clamping means extending across the bars and adjustably mounted for selective positioning vertically of the bars.
  • a torsion bar assembly comprising a center bar and two parallel bars on opposite sides thereof and integrally joined at one end to the center bar, fastening means at opposite ends of the center bar for connecting the same to the feeder, and clamping means extending across the bars intermediate the fastening means and being adjustable lengthwise of the bars.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigging Conveyors (AREA)
US40678A 1970-05-26 1970-05-26 Vibratory feeder Expired - Lifetime US3655032A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4067870A 1970-05-26 1970-05-26

Publications (1)

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US3655032A true US3655032A (en) 1972-04-11

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Application Number Title Priority Date Filing Date
US40678A Expired - Lifetime US3655032A (en) 1970-05-26 1970-05-26 Vibratory feeder

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US (1) US3655032A (enrdf_load_stackoverflow)
BE (1) BE766961A (enrdf_load_stackoverflow)
DE (1) DE2123365A1 (enrdf_load_stackoverflow)
FR (1) FR2090280B3 (enrdf_load_stackoverflow)
GB (1) GB1307151A (enrdf_load_stackoverflow)
LU (1) LU63102A1 (enrdf_load_stackoverflow)
NL (1) NL7107195A (enrdf_load_stackoverflow)
SE (1) SE376890B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2209701A1 (enrdf_load_stackoverflow) * 1972-12-06 1974-07-05 Burgess Warren
US3932442A (en) * 1973-08-27 1976-01-13 Lundy Electronics & Systems, Inc. Process for screening materials with vibrating screens
US4000807A (en) * 1975-05-21 1977-01-04 The Bendix Corporation Vibratory trough part feeder
US4128161A (en) * 1975-02-14 1978-12-05 Yonkers Edward H Vibratory device
US5988359A (en) * 1997-02-24 1999-11-23 Graham; S. Neal Vibratory drive unit and associated parts feeder bowl
US20040111136A1 (en) * 1996-08-13 2004-06-10 Oratec Interventions, Inc., A Delaware Corporation Method for treating intervertebral discs
US20100175968A1 (en) * 2007-06-19 2010-07-15 Motohiro Yagyu Vibrating feeder, carrying device and inspection device
US20110083944A1 (en) * 2008-06-25 2011-04-14 Per Brunes Vibratory conveyor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821292A (en) * 1953-12-29 1958-01-28 Syntron Co Torsion bar mounted vibratory motors
US3087603A (en) * 1961-07-11 1963-04-30 Sperry Rand Corp Vibratory feeder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821292A (en) * 1953-12-29 1958-01-28 Syntron Co Torsion bar mounted vibratory motors
US3087603A (en) * 1961-07-11 1963-04-30 Sperry Rand Corp Vibratory feeder

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2209701A1 (enrdf_load_stackoverflow) * 1972-12-06 1974-07-05 Burgess Warren
US3932442A (en) * 1973-08-27 1976-01-13 Lundy Electronics & Systems, Inc. Process for screening materials with vibrating screens
US4128161A (en) * 1975-02-14 1978-12-05 Yonkers Edward H Vibratory device
US4000807A (en) * 1975-05-21 1977-01-04 The Bendix Corporation Vibratory trough part feeder
US6997941B2 (en) 1996-08-13 2006-02-14 Oratec Interventions, Inc. Method and apparatus for treating annular fissures in intervertebral discs
US20040111136A1 (en) * 1996-08-13 2004-06-10 Oratec Interventions, Inc., A Delaware Corporation Method for treating intervertebral discs
US8187312B2 (en) 1996-08-13 2012-05-29 Neurotherm, Inc. Method for treating intervertebral disc
US7267683B2 (en) 1996-08-13 2007-09-11 Oratec Interventions, Inc. Method for treating intervertebral discs
US7282061B2 (en) 1996-08-13 2007-10-16 Oratec Interventions, Inc. Method of treating intervertebral disc
US20080091252A1 (en) * 1996-08-13 2008-04-17 Oratec Interventions, Inc., A California Corporation Method for treating intervertebral disc
US7400930B2 (en) 1996-08-13 2008-07-15 Oratec Interventions, Inc. Method for treating intervertebral discs
US7647123B2 (en) 1996-08-13 2010-01-12 Oratec Interventions, Inc. Method for treating intervertebral discs
US8226697B2 (en) 1996-08-13 2012-07-24 Neurotherm, Inc. Method for treating intervertebral disc
US5988359A (en) * 1997-02-24 1999-11-23 Graham; S. Neal Vibratory drive unit and associated parts feeder bowl
US8123024B2 (en) * 2007-06-19 2012-02-28 Qualicaps Co., Ltd. Vibrating feeder, carrying device and inspection device
US20100175968A1 (en) * 2007-06-19 2010-07-15 Motohiro Yagyu Vibrating feeder, carrying device and inspection device
US20110083944A1 (en) * 2008-06-25 2011-04-14 Per Brunes Vibratory conveyor
US8464861B2 (en) 2008-06-25 2013-06-18 Per Brunes Vibratory conveyor

Also Published As

Publication number Publication date
FR2090280B3 (enrdf_load_stackoverflow) 1977-01-14
DE2123365A1 (de) 1971-12-16
FR2090280A3 (enrdf_load_stackoverflow) 1972-01-14
NL7107195A (enrdf_load_stackoverflow) 1971-11-30
LU63102A1 (enrdf_load_stackoverflow) 1971-11-29
BE766961A (fr) 1971-10-01
SE376890B (enrdf_load_stackoverflow) 1975-06-16
GB1307151A (en) 1973-02-14

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