US3771644A - Driving units for producing a reciprocatory and oscillatory motion simultaneously - Google Patents

Driving units for producing a reciprocatory and oscillatory motion simultaneously Download PDF

Info

Publication number
US3771644A
US3771644A US00088418A US3771644DA US3771644A US 3771644 A US3771644 A US 3771644A US 00088418 A US00088418 A US 00088418A US 3771644D A US3771644D A US 3771644DA US 3771644 A US3771644 A US 3771644A
Authority
US
United States
Prior art keywords
parts
base member
driving unit
armature
core
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
US00088418A
Other languages
English (en)
Inventor
R Mafli
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.)
KUMAG AG
Original Assignee
KUMAG 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
Application filed by KUMAG AG filed Critical KUMAG AG
Application granted granted Critical
Publication of US3771644A publication Critical patent/US3771644A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B65G27/16—Applications of devices for generating or transmitting jigging movements of vibrators, i.e. devices for producing movements of high frequency and small amplitude
    • B65G27/24—Electromagnetic devices

Definitions

  • a driving unit for producing reciprocatory and oscillatory motion simultaneously comprises a pot-shaped plastics component comprising a disc-shaped part spaced from and connected to a ring-shaped part by a plurality of connected members in the form of leaf springs extending helically between the parts.
  • An electromagnet is mounted within the component, the ringshaped part of which is mounted on a base member and the armature of the electromagnet being rigid with the disc-shaped part.
  • the leaf springs are substantially rigid longitudinally and flexible transversely whereby actuation of the electromagnet causes the disc-shaped part to move linearly and rotatably relative to the ring shaped part.
  • the present invention relates to driving units for producing a reciprocatory and oscillatory motion simultaneously.
  • Driving units for producing simultaneous reciprocatory and oscillatory motion are used, for example to drive helical conveyors.
  • Driving units proposed hitherto have been rigidly incorporated in the helical conveyor with the conveyor helix being mounted for movement relative to a chassis.
  • the helix is connected to the chassis by springs attached to the chassis and helix by connectors fitted to the chassis and the helix, by means of screwthreaded or other detachable connections to enable adjustment to be effected after assembly, such adjustment being necessary unless the various components are made to very fine tolerances.
  • the connections often work loose when the conveyor has been in use for a certain time, readjustment then becoming necessary.
  • a driving unit for producing reciprocatory and oscillatory motion simultaneously comprising a first plastics member, a second plastics member, a plurality of elongate plastics, connecting members extending between said first and second members and integral with said first and second members, each said connecting memher being substantially rigid longitudinally and flexible transversely, and electromagnetic means actuable to move said first member towards said second member against the bias of a restoring force, said connecting members being so disposed relative to said first and second members that movement of said first member towards said second member is accompanied by rotation of said first member relative to said second member.
  • a driving unit for producing reciprocatory and oscillatory motion simultaneously comprising a plastics component, said component including a first part, a second part, and a plurality of connecting members extending between said first and second parts, said conapply a periodically variable force of equal and opposite magnitude between said parts whereby one of said parts is moved relative to the other of said parts along said axis and is simultaneously rotated relative to the other of said parts about said axis.
  • FIG. 1 is a longitudinal section of one form of driving unit in accordance with the invention.
  • FIG. 2 is a fragmentary section of a modified form of the driving unit shown in FIG. 1;
  • FIG. 3 is a perspective view to an enlarged scale of a plastics component of the driving unit shown in FIG. 1;
  • FIG. 4 is a front elevation of a helical conveyor mounted on the driving unit shown in FIG. 1.
  • the driving unit for producing reciprocatory and oscillatory motion simultaneously illustrated in FIG. 1, comprises a chassis or base member 1, made of ferromagnetic material, a substantially pot-shaped integral plastics component 2 (shown in perspective in FIG. 3) which has a substantially ring-shaped part or member 2a, a disc-shaped part or member 2b and elongate conof the two circles.
  • the driving unit also incorporates necting members being substantially rigid longitudinally and flexible transversely to permit relative movement between said parts, each said connecting member being attached to said first part at a respective point lying on a first circle and to said second part at a respective point lying on a second circle, said first and second circles lying in parallel planes and the centres of said first and second circles lying on an axis extending at right angles to said planes and the length of each said connecting member between said first and second circles being greater than the shortest distance between said circles, and electromagnetic means actuable to electromagnetic means in the form of an electromagnet 3 whereby equal and opposite forces and/or moments of periodically variable value can be exerted on the two parts 2a, 2b in such a way as to cause one of the parts to move in relation to the other part along the said axis and to simultaneously rotate relative to the other part about the aforesaid axis.
  • the points of attachment of the leaf springs 2c are distributed symmetrically round the circumference of the two circles already mentioned.
  • the leaf springs 20 are attached to the part 2b at points lying on the periphery thereof and to the part 2a at points lying a flat axial end face thereof.
  • the part 2b is disc-shaped, it may also be ringshaped.
  • the inclination of the leaf springs 2c between the parts 2a and 2b correspond substantially to that of the threads of a multi-start screw of equivalent size having as many threads as there are leaf springs and a pitch which is a multiple of the diameter of the part 2b.
  • At least one electromagnet 3 is mounted within the component 2 and comprises a magnetic coil 5 having Each leaf spring 2c attached to the part 2a at a point i a mains lead 4, a coil casing 6, a magnetic core 8 carrying a threaded bolt 7, and an armature 10, which carries an output drive member 9 which is fixed to the disc-shaped part 2b.
  • the axis of the bolt 7 extends in the same direction as, and preferably coincides with, the axis of the component 2.
  • An outer casing 11 encloses the component 2 and anchors the ring-shaped part 20 and the coil casing 6 to the base member 1.
  • Adjustment of an air gap 12 between the core 8 and the armature 1 is provided by a slotted nut 13 in the form of a worm wheel and threadably engaged with the bolt 7.
  • a worm I4 is in mesh with the nut 13.
  • the mode of operation of the driving unit shown in FIG. 1 is as follows:
  • Alternating mains current is fed to the electromagnet 3, that is to say to its coil 5, through the mains lead 4.
  • the result is that the armature 10 is attracted towards the core 8 at twice the frequency of the 21.0. current.
  • the armature 10, however, is fixed by the drive member 9 to the disc-shaped part 2b of the component 2. Consequently, every time the armature 10 is attracted towards the magnet core 8, the disc-shaped part 2b is pulled downwards, whereby the distance between the disc-shaped part 2b and the ring-shaped part 2a is reduced.
  • the leaf-springs 2c are substantially rigid longitudinally but are flexible transversely, so that rotation of the part 2b in relation to the part 2a occurs, because of the obliquity of the leaf-springs 20 (FIG.
  • the component 2 is formed from a resilient plastics, for example a polyacetal, so that the transverse movement of the leaf-springs 2c produces a restoring force, by which, following upon the said rotation of the part 2b in relation to the part 2a, rotation of the part 2b in the reverse sense is brought about as soon as the armature 10 ceases to be attracted by the core 8, that is to say as soon as the alternating current flowing through the coil has passed its peak and is again approaching zero.
  • a conveyor helix 20 for example, similar to the type shown in FIGS. 17 and 18 of Swiss Pat. No. 316,008, may be fitted, as shown in FIG. 4, to the drive member 9, the longitudinal axis of the component 2 being vertical.
  • the conveyor helix 20 has its base resting on the part 2b and has a central hole into which the drive member 9 extends. By means of a screw (not shown), which is received in a threaded hole 21 in the drive member 9, the helix 20 is secured firmly to the drive member 9.
  • the speed of the conveyor speed is determined substantially by the amplitude of the reciprocating and rotary vibrations. It is to enable the amplitude of reciprocating and rotary vibration and hence also the conveyor speed, to be adjusted while the conveyor is in operation, that the means of adjusting the air gap 12, are provided; a variation in the air gap 12 alters the force with which the armature 10 is attracted by the core 8, and this alteration in the force of attraction results in an approximately proportional alteration in the amplitude of the reciprocating and rotary vibrations carried out by the part 2b, the armature 10 and the drive member 9.
  • the worm 14 is rotated by means of a screw 22 (FIG. 4), the slotted nut 13 being thereby rotated, in consequence of which the threaded bolt 7 and the core 8 are moved vertically.
  • the nut 13 is not vibrated by the forces acting on the core 8, it is held fast by two powerful cup springs 15 interposed between thrust bearings 16.
  • the thrust bearings 16 are provided to enable the nut 13 to be turned despite this firm grip by the cup springs 15.
  • the assembly comprising the two thrust bearings 16, the two cup springs 15 and the nut 13, is secured firmly in the base member 1 by a locking ring 17.
  • an anti-rotation pin 18 is mounted in the base member 1 and extends into a slot 19 in the core 8.
  • the bolt 7 is engaged in a threaded bore 23 in the base member.
  • a slot 24, is formed in the bottom end of the bolt 7 for the reception of a screw-driver or like tool and a locknut 25, is provided for locking the bolt 7 thereby to the gap setting.
  • the natural resonant frequency of the driving unit should be as nearly equal as is possible to twice the frequency of the ac. supply to be used, because then the power consumption of the driving unit will be reduced to the minimum.
  • the mass and inertia of the driven object that is to say the conveyor helix 20, for instance, will affect the resonant frequency. This consideration should be taken into account when determining the dimensions of the component 2 and, in particular, the connecting members 2c thereof.
  • a two-part mould is used, this being opened, after production of the component, by the two halves of the mould being pulled apart in an axial direction.
  • one part of the mould is in the form of a first cylinder mounted on a plate and the other half is in the form .of a second hollow, cylinder closed at one end.
  • the inside diameter of the second cylinder is equal to the outside diameter of the first cylinder and its depth is greater, by the thickness of the part 2b, than the height of the first cylinder.
  • the open end of the second cylinder is widened and corresponds to the shape of the part 2a. Grooves, corresponding in number to the connecting members extend from the front end of the hollow cylinder along the full length thereof.
  • the inclination of the grooves corresponds to that of the threads of a multi-start screw of equivalent size having as many threads as there are connecting members and a pitch which is a multiple of the inside diameter of the second cylinder.
  • Variation in the length of the connecting members 2c and at the same time in the depth of the part 2a can be achieved without difficulty, in the production method described, if that part of the mould which is in the form of a hollow cylinder be composed of three separate members, viz, a cylindrical jacket with a smooth cylindrical interior, the inside diameter of which is equal to the diameter of an imaginary cylindrical surface defined by the outer edges of the connecting members 2c and having a widened portion at its front end corresponding to the widened step on the part 2a; secondly, a hollow cylinder that can slide axially within this cylin drical jacket, but is secured (by key and keyway, for example) against rotation relative thereto, its outside diameter being equal to the inside diameter of the cylindrical jacket and its inner wall containing the continuous grooves described previously, the grooves extending almost to the outer wall of the hollow cylinder and also, over a front portion of its entire length, possibly reaching the outer periphery of the hollow cylinder (in other words, piercing the outer wall of the
  • the screw is screwed into the hollow cylinder from the rear, with its head bearings against the rear end of the cylindrical jacket, its length from where it bears against the cylindrical jacket to its front end being equal to the length of the cylindrical jacket less the depth of the component 2.
  • the half-mould comprising the said three members (cylindrical jacket, hollow cylinder and multi-start screw) again forms, as such, a hollow cylindrical halfmould closed at its rear end and has the same features and advantages as the hollow cylindrical half-mould previously described in connection with the production method already referred to.
  • the technique employed in making the component by the use of such an adjustable half-mould is therefore the same as previously described, with the sole addition that the adjustable halfmould is set to the desired length for the connecting members 20 before the component 2 is made.
  • the parts 2a and 2b can comprise the conveyor helix on one hand and the conveyor chassis on the other, or can, as described, be constructed to be readily attached to the chassis and to the conveyor helix which is advantageous in that manufacture of the component 2 is relatively simple and inexpensive.
  • the component is suitably made from a resilient plastics, preferably a polyacetal.
  • the plastics used should preferably have a modulus of elasticity exceeding 10,000 kp./sq.cm. and a bending strength exceeding 500 kp./sq.cm.
  • a driving unit for simultaneously producing reciprocatory and oscillatory motion comprising:
  • a plastics component including,
  • one of said parts being ring-shaped and having a flat axial end face and the other of said parts having an arcuate periphery,
  • leaf springs extending helically between said first and second parts to define a housing therewith and said springs being integrally connected with said parts, said leaf springs being attached to said one part at respective points lying on said axial face and to said other part at respective points lying on the arcuate periphery thereof, said leaf springs being substantially rigid longitudinally and flexible transversely to permit relative movement between said parts, said axial face and said arcuate periphery lying in parallel planes with their respective centers lying on an axis extending at right angles to said planes, the length ofeach said leaf spring between their respective attachment points being greater than the shortest distance between said respective attachment points; electromagnetic means located within said housing and actuable to apply a periodically variable force of equal and opposite magnitude between said parts whereby said one part is moved relative to said other part along said axis and is simultaneously rotated relative to said other part about said axis, said electromagnetic means including at least one electromagnet having a core means and armature means, one of said core and armature means being mounted on
  • a driving unit in which said leaf springs are attached to said first and second parts at said respective points distributed symmetrically about the circumference of said axial face and said arcuate periphery.
  • a driving unit according to claim 1 in combination with a helical conveyor, said axis extending vertically and said conveyor being attached to the other of said parts, said other of said parts being disposed above said one of said parts.
  • said adjustment means comprises bolt means extending from the said one of said means in the same direction as said axis, said bolt means being mounted in said base member, nut means engaged with said bolt means and rotatable relative to said base member, means preventing axial movement of said nut means relative to said base member, and means for rotating said nut means relative to said base member.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigging Conveyors (AREA)
  • Toys (AREA)
US00088418A 1969-11-19 1970-11-10 Driving units for producing a reciprocatory and oscillatory motion simultaneously Expired - Lifetime US3771644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1720169A CH516351A (de) 1969-11-19 1969-11-19 Antriebsaggregat zur Erzeugung von gleichzeitigen Hub- und Drehschwingungen

Publications (1)

Publication Number Publication Date
US3771644A true US3771644A (en) 1973-11-13

Family

ID=4423548

Family Applications (1)

Application Number Title Priority Date Filing Date
US00088418A Expired - Lifetime US3771644A (en) 1969-11-19 1970-11-10 Driving units for producing a reciprocatory and oscillatory motion simultaneously

Country Status (5)

Country Link
US (1) US3771644A (de)
AT (1) AT297585B (de)
CH (1) CH516351A (de)
DE (1) DE2051573C3 (de)
GB (1) GB1274560A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932442A (en) * 1973-08-27 1976-01-13 Lundy Electronics & Systems, Inc. Process for screening materials with vibrating screens
GB2189654B (en) * 1986-04-25 1991-01-09 Yamato Scale Co Ltd Vibrator
US10295012B2 (en) 2014-12-11 2019-05-21 Stabilus Gmbh Spindle drive

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3713980A1 (de) * 1987-04-25 1988-11-03 Schwabe Gmbh Schwingfoerderer
DE3713979C2 (de) * 1987-04-25 1996-08-29 Vossloh Schwabe Gmbh Schwingförderer
DE10026169C2 (de) * 1999-05-26 2003-06-05 Deutsch Zentr Luft & Raumfahrt Verwendung eines elastischen Konstruktionselements als Torsionsfeder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH316008A (it) * 1951-09-13 1956-09-15 Suntron Company Dispositivo comprendente un congegno per imprimere un movimento oscillatorio ad un apparecchio disposto su di questo congegno
US2969971A (en) * 1958-07-23 1961-01-31 Minnesota Mining & Mfg Reinforced plastic springs
US3322260A (en) * 1966-02-07 1967-05-30 Otto K Schwenzfeier Balanced vibratory parts feeder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH316008A (it) * 1951-09-13 1956-09-15 Suntron Company Dispositivo comprendente un congegno per imprimere un movimento oscillatorio ad un apparecchio disposto su di questo congegno
US2969971A (en) * 1958-07-23 1961-01-31 Minnesota Mining & Mfg Reinforced plastic springs
US3322260A (en) * 1966-02-07 1967-05-30 Otto K Schwenzfeier Balanced vibratory parts feeder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Western Electric Technical Digest No. 1, 1966. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932442A (en) * 1973-08-27 1976-01-13 Lundy Electronics & Systems, Inc. Process for screening materials with vibrating screens
GB2189654B (en) * 1986-04-25 1991-01-09 Yamato Scale Co Ltd Vibrator
US10295012B2 (en) 2014-12-11 2019-05-21 Stabilus Gmbh Spindle drive

Also Published As

Publication number Publication date
CH516351A (de) 1971-12-15
DE2051573B2 (de) 1975-02-06
GB1274560A (en) 1972-05-17
DE2051573C3 (de) 1975-10-02
DE2051573A1 (de) 1971-05-27
AT297585B (de) 1972-03-27

Similar Documents

Publication Publication Date Title
US5460585A (en) Muscle training and physical rehabilitation machine using electro-rheological magnetic fluid
US4884002A (en) Rotary or linear electric motor whose armature is driven by means of ultrasonic vibrations
US9107797B2 (en) Sexual stimulation devices and methods
US3771644A (en) Driving units for producing a reciprocatory and oscillatory motion simultaneously
US5266917A (en) Linear magnetic sensing device
US3870282A (en) Noiseless air-actuated turbine-type vibrator
US4785430A (en) Hydraulic vibrator with wide dynamic range
US3855487A (en) Vibration generator for studying structures
US3840760A (en) Electric vibrator motor
GB2088017A (en) Screw and Nut Mechanism
GB1371659A (en) Screw drive arrangement having a spindle and a nut
US3210580A (en) Electro-acoustic transducer
CN108336891B (zh) 转动和平动作动器及其组合装置
US2274875A (en) Electromagnetic motor
US4263825A (en) Reciprocating stroke length adjustment device and method
SU622722A1 (ru) Электромагнитный вибровозбудитель
US2859362A (en) Vibratory motor with motion conversion mechanism
US2713980A (en) Traverse mechanism
CA1253189A (en) Electromagnetic vibratory exciter
US6651807B2 (en) Parts feeder
US3575620A (en) Vibratory drive unit
US5744884A (en) Liner motion micropositioning apparatus and method
US2438958A (en) Vibration actuated indicator
CN1048178A (zh) 激振器
US3209584A (en) Apparatus for fatigue testing