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Timestamp: 2015-03-06 17:00:48
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Matched Legal Cases: ['art.\n22', 'art 39', 'arts 39', 'arts 39', 'art 39', 'arts 39', 'art 139', 'arts 139', 'arts 239', 'art 339', 'arts 339', 'arts 339', 'art 439', 'art 439', 'arts 439', 'arts 439']

Patent USRE39481 - Device for transmitting motion between the rotor of a synchronous permanent ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA device for transmitting motion between the rotor of a synchronous permanent-magnet motor and the working part, having an increased free rotation angle, which comprises at least two motion transmission couplings which mutually cooperate in a kinematic series. Each coupling is constituted by at least...http://www.google.com/patents/USRE39481?utm_source=gb-gplus-sharePatent USRE39481 - Device for transmitting motion between the rotor of a synchronous permanent-magnet motor and the working part, having an increased free rotation angleAdvanced Patent SearchPublication numberUSRE39481 E1Publication typeGrantApplication numberUS 10/841,426PCT numberPCT/EP1999/001715Publication dateJan 30, 2007Filing dateMar 16, 1999Priority dateMar 19, 1998Fee statusPaidAlso published asDE69912051D1, EP0983630A1, EP0983630B1, EP1372245A1, EP1372245B1, EP1801954A2, EP1801954A3, EP1801954B1, US6384508, US7097434, US20020122688, US20050147510, WO1999048189A1Publication number10841426, 841426, PCT/1999/1715, PCT/EP/1999/001715, PCT/EP/1999/01715, PCT/EP/99/001715, PCT/EP/99/01715, PCT/EP1999/001715, PCT/EP1999/01715, PCT/EP1999001715, PCT/EP199901715, PCT/EP99/001715, PCT/EP99/01715, PCT/EP99001715, PCT/EP9901715, US RE39481 E1, US RE39481E1, US-E1-RE39481, USRE39481 E1, USRE39481E1InventorsElio MarioniOriginal AssigneeAskoll Holdings S.R.L.Export CitationBiBTeX, EndNote, RefManPatent Citations (11), Referenced by (2), Classifications (15), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetDevice for transmitting motion between the rotor of a synchronous permanent-magnet motor and the working part, having an increased free rotation angle
US RE39481 E1Abstract
A device for transmitting motion between the rotor of a synchronous permanent-magnet motor and the working part, having an increased free rotation angle, which comprises at least two motion transmission couplings which mutually cooperate in a kinematic series. Each coupling is constituted by at least one driving element which is eccentric with respect to the rotation axis and is rigidly coupled to a first component of the motion transmission system and by at least one driven element, which is also eccentric with respect to the rotation axis and is rigidly coupled to the component arranged kinematically after the preceding one. The angle covered by the elements of each coupling is, as a whole, less than a round angle. The intermediate components of the kinematic transmission have both a driven element and a driving element for receiving the motion from the preceding one and transmitting it to a subsequent one.
1. A device for transmitting motion between the a rotor of a synchronous permanent-magnet motor and the a working part, comprising comprising:
at least two motion transmission couplings which mutually cooperate in a kinematic series, series; eacha first coupling being constituted byof said motion transmission couplings comprising at least one driving element which is eccentric with respect to the rotation axis and is rigidly coupled to a component of the motion transmission system and bythe rotor, and at least one driven element, which is also eccentric with respect to the rotation axis and is rigidly coupled to the component arranged kinematically after the preceding one,and can rotate freely with respect to said rotor;
a second coupling of said motion transmission couplings comprising at least one driving element which is eccentric with respect to the rotation axis and at least one driven element which is also eccentric with respect to the rotation axis and is rigidly coupled to the working part,
wherein the angle covered by the elements of each coupling beingis, as a whole, less than a round angle, the intermediate components of the kinematic transmission having both a driven element and a driving element for receiving the motion from a preceding one and transmitting it to a subsequent one,360�, wherein said at least one driving element of the second coupling comprises said at least one driven element of said first coupling;
wherein said motion transmission couplings are toothed, a first one of said couplings being constituted by two first teeth which arethe first coupling comprising at least one driving tooth which is eccentric with respect to the rotation axis and is rigidly coupled to the rotor, of a motor in diametrically opposite positions, and of two second teeth which are rigidly coupled, likewise in diametrically opposite positions, to an annular element whichrotor, and at least one driven tooth which is also eccentric with respect to the rotation axis and can rotate freely with respect to said rotor,the working part;
a second one of said couplings being composed of said second teeth and of two thirds teeth which are also diametrically opposite and arethe second coupling comprising at least one driving tooth, which is eccentric with respect to the rotation axis and can rotate freely with respect to the working part and by at least one driven tooth which is also eccentric with respect to the rotation axis and is rigidly coupled to the working partpart, and wherein a radial clearance is provided between the at least one driven tooth of the second coupling and the at least one driving tooth of the first coupling. 2. The device according to claim 1, comprising four couplings which mutually cooperate in a kinematic series, a the first one of said couplings being constituted by comprising a first tooth which is rigidly coupled to the a free shaft of a motor the rotor and of by a second tooth which is rigidly coupled to an annular element which can rotate freely with respect to said free shaft, a second one of said couplings being composed of comprising said second tooth and of a third tooth which is rigidly coupled to the working part, part; a third one of said couplings being composed of comprising a fourth tooth which is rigidly coupled to the rotor of said motor and of a fifth tooth which is rigidly coupled to an annular element which moves can rotate freely with respect to said free axis shaft, a fourth one of said couplings being composed of comprising said fifth tooth and of a sixth tooth which is rigidly coupled to said free shaft.
3. The device according to claim 2 22, wherein two of said four motion transmission couplings are arranged in an axial hollow body which protrudes from is rigidly coupled to said working part toward said rotor and is closed by a cover.
7. The device according to claim 1 23, wherein said motion transmission couplings are arranged in an axial hollow body which is rigidly coupled to said working part and is closed by a cover.
8. The device according to claim 7 3, wherein said first tooth protrudes from a tang which is keyed on the end of said a free shaft of the rotor, said first tooth being arranged eccentrically with respect to said free shaft and constituting comprising a driving tooth for said second tooth which protrudes axially from an annular element which can rotate freely in said hollow body with respect to said free shaft and to said hollow body, said second tooth having an extension which allows it to make contact with said first tooth and with said third tooth which protrudes from an internal wall of the hollow body.
9. The device according to claim 8, wherein said first tooth has a radial extension which partially affects an integral internal space of said hollow body, the radial extension of said second tooth affecting a region between said tang and an external wall of said hollow body, providing clearances which allow free movement, said second tooth having an axial extension for making contact with said first tooth and with said third tooth, said third tooth protruding radially from the internal wall of said hollow body towards an in the vicinity of the external profile of said first tooth.
10. The device according to claim 7, wherein said first tooth protrudes from a tang which is keyed to on the end of said a shaft of the rotor, said first tooth being arranged eccentrically with respect to said shaft and constituting a driving tooth for said second tooth which protrudes axially from an annular element which can rotate freely in said hollow body with respect to said shaft and to said hollow body, said second tooth having an extension adapted which allows it to make contact with said first tooth and with said third tooth which protrudes axially from the face of said cover which from a position which is proximate to the outer profile of the face that is directed toward the inside of the hollow body.
11. The device according to claim 10, wherein said first tooth has a radial limited axial extension which partially affects an in the internal space of said hollow body, the radial extension of said second tooth affecting a region between said tang and an external wall of said hollow body, providing clearances which allow free movement, said second tooth having an axial extension adapted which allows it to make contact with said first tooth and with said third tooth, said third tooth protruding radially from a position which is proximate to an external profile of the cover towards an external profile of said annular element being such that it cannot make contact with said first tooth but only with said second tooth.
12. The device according to claim 1 22, wherein said motion transmission couplings comprise a first tooth which is rigidly coupled to an axial tang which protrudes from a tip head flange of said rotor, said annular element from which said second tooth protrudes being arranged so as to surround said a shaft of said rotor and so that it can rotate freely, the extension of said second tooth being such that it can make contact with said first tooth and with said third tooth which protrudes from another annular element which is rigidly coupled to said shaft.
18. The device according to claim 1, wherein at least one of said teeth is composed of an internal supporting part which is made of rigid plastics and of two mutually opposite external parts which are overmolded on the internal part, are made of elastomeric material, and form the surfaces for contact with the other teeth .
21. The device according to claim 1, comprising two couplings which mutually cooperate in a kinematic series, the first one of said couplings comprising a first tooth which is rigidly coupled to the rotor of the motor and by a second tooth which is rigidly coupled to an annular element which can rotate freely with respect to said rotor; a second one of said couplings comprising said second tooth and a third tooth which is rigidly coupled to the working part.
22. The device according to claim 1, comprising two couplings which mutually cooperate in a kinematic series, the first one of said couplings comprising two first teeth which are rigidly coupled to the rotor of the motor in diametrically opposite positions, and two second teeth which are rigidly coupled, likewise in diametrically opposite positions, to an annular element which can rotate freely with respect to said rotor; a second one of said couplings comprising said second teeth and two third teeth which are also diametrically opposite and are rigidly coupled to the working part.
The present invention relates to a device for transmitting motion between the rotor of a synchronous permanent-magnet motor and the working part having an increased free rotation angle.
The aim of the present invention is to provide a device for transmitting motion between the rotor of a synchronous permanent-magnet motor and the working part which increases the angle of freedom that can be provided at present.
Further characteristics and advantages of the invention will become apparent from the following detailed description of an embodiment thereof, illustrated by way of non-limitative example of the accompanying drawings, wherein:
FIG. 2 is an axial section view of the rotor, of the device and of the impeller of FIG. 1;
With reference to the above FIGS. 1 to 5, said figures illustrate a permanent-magnet electric motor, generally designated by the reference numeral 10, which comprises a stator 11, with a lamination pack 12 and windings (not shown), and a rotor 14, which is arranged between two poles formed by said lamination pack 12.
The rotor 14 is constituted by an annular cylindrical permanent magnet 16 whereon a plastic element 17 is overmolded, forming an internal shank 17a and end flanges 17b.
The rotor 14 accordingly has, as a whole, a cylindrical shape with an axial hole 18 in which a shaft 19 is rigidly inserted.
A thrust bearing, generally designated by the reference numeral 30, is arranged between the bushing 28 and the corresponding flange 17b.
According to the invention, between the rotor 14, and accordingly between the shaft 19 rigidly coupled thereto, and the working part, which in this case is constituted by an impeller 32 of a centrifugal pump generally designated by the reference numeral 33 and coupled to the electric motor 10, there is a motion transmission device which comprises, in this case, two motion transmission couplings which mutually cooperate in a kinematic series.
The shaft 19 in fact has, on its end, two diametrically opposite flat regions 19a by means of which it couples to a complementarily shaped hole 38a of the tang 38.
Axial fixing is achieved by means of elastic hooks 38b of the tang 38 which enter an annular groove 19b of the shaft 19.
The second tooth 39 is composed of an internal supporting part 39a made of rigid plastics and of two mutually opposite external parts 39b which are overmolded on the preceding one, are made of elastomer and form the contact surfaces.
The radial extension of the second tooth 39 affects all of the region between the tang 38 and the outer wall of the hollow body 34, providing of course clearances which allow free movement or providing a slightly interference (achieving a friction engagement) for example with a circumferential elastomeric element, not shown.
The second tooth 39 is therefore a tooth which is driven by the first tooth 37 and drives the third tooth 41, interacting therewith through the elastomeric parts 39b.
The angle covered by the assembly constituted by the first tooth 37 and by the second tooth 39 is smaller than a round angle and so is the angle covered by the assembly constituted by the second tooth 39 and by the third tooth 41.
The motion transmission device is thus composed of two couplings which mutually cooperate in a kinematic series; a first one of said couplings is constituted by a driving element, which is eccentric with respect to the rotation axis (the first tooth 37) and is rigidly coupled to a component of the motion transmission system (the rotor 14), and by a driven element (the second tooth 39 with the corresponding part 39b), which is also eccentric with respect to the rotation axis and is rigidly coupled to the component arranged kinematically after the preceding one (the annular element 40).
A second one of these couplings is composed of a driving element (the second tooth 39 with one of its parts 39b), which is rigidly coupled to a component of the motion transmission system (the annular element 40), and of a driven element (the third tooth 41), which is rigidly coupled to the component of the motion transmission system that is arranged kinematically to follow (the impeller 32).
In this case, an axial tang 138 protrudes from the head flange 117b of the rotor 114 and has a first eccentric tooth 137 which has a limited radial extension.
In this case also, the second tooth 139 has an internal supporting part 139a and two external parts 139b made of elastomeric material.
The first teeth 237 are arranged axially in offset positions and the second teeth 239 are shaped so as to have parts 239a which protrude radially so as to affect all of the region between the tang 238 and the external wall of the hollow body 234, providing of course clearances which allow free movement or providing slight interference, producing a friction engagement, for example with a circumferential elastomeric element, not shown.
The second tooth 339 is composed of an internal supporting part 339a made of rigid plastics and of two mutually opposite external parts 339b which are overmolded on the internal part, are made of elastomeric material, and form the contact surfaces.
The second tooth 339 is therefore a tooth which is driven by the first tooth 337 and drives the third tooth 341, interacting with them by means of the elastomeric parts 339b.
The angle covered by the assembly constituted by the first tooth 337 and the second tooth 339 is smaller than a round angle and so is the angle covered by the assembly constituted by the second tooth 339 and by the third tooth 341.
The motion transmission device, in this case, again has an axial tang 342 which protrudes from the head flange 317b of the rotor 314 and has a fourth eccentric tooth 343 which has a limited radial extension.
Said end in fact has two diametrically opposite flat regions 419a with which a complementarily shaped hole 438a of the tang 438 mates.
Said second tooth 439 has an internal supporting part 439a made of rigid plastics which is monolithic with the annular element 440, which in this case has a substantially cylindrical structure, and is embedded in the remaining part 439b made of elastomeric material, which is overmolded on the preceding one and forms the contact surfaces.
The radial extension of said second tooth 439 affects all of the region between the rang 438 and the internal wall of the hollow body 434.
In particular, the axial extension of said third tooth 441 is such that it can make contact only with the elastomeric external parts 439b of the second tooth 439 but cannot make contact with said first tooth 437.
Said second tooth 439 is accordingly driven by the first tooth 437 and in turn drives said third tooth 441 by means of the elastomeric parts 439b.
The angle covered by the assembly constituted by the first tooth 437 and by the second tooth 439 is less than a round angle and so is the angle covered by the second tooth 439 together with said third tooth 441.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS1627964 *Mar 24, 1925May 10, 1927Nat Automatic Tool CoLost-motion couplingUS4661085 *Sep 9, 1985Apr 28, 1987Philips Home Products, Inc.Lost motion clutch assemblyUS4750872 *Jun 25, 1986Jun 14, 1988Easthorpe Investments Ltd.Centrifugal pump with damped motor connectionUS4803855 *Aug 10, 1987Feb 14, 1989Whirlpool CorporationSingle shaft agitate and spin drive for automatic washerUS4861240 *Apr 19, 1988Aug 29, 1989Askoll S.R.L.Centrifugal pump for electric household appliances such as washing machines, dishwashers and the likeUS5668425 *Jan 5, 1996Sep 16, 1997Askoll A.P.A.Startup device for the rotor of a permanent-magnet synchronous motorEP0213751A1 *Jul 30, 1986Mar 11, 1987Advanced Cardiovascular Systems, Inc.Steerable dilatation catheter with rotation limiting deviceEP0723329A2 *Jan 10, 1996Jul 24, 1996ASKOLL S.p.A.Improved startup device for the rotor of a permanent-magnet synchronous motorEP0945622A1 *Mar 24, 1999Sep 29, 1999Pmp S.P.A.Synchronous electric pump with silencing deviceFR965022A * Title not availableWO1994021026A1 *Feb 18, 1994Sep 15, 1994Werner HangmannSynchronous motor fitted with a starting aid* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS8057199 *May 29, 2006Nov 15, 2011Jiangmen Idear Hanyu ElectricalCentrifugal drainage pump with shock absorbing coupling arrangmentUS20120112567 *Nov 9, 2011May 10, 2012Fu Zhi PingMotor assembly* Cited by examinerClassifications U.S. Classification310/12.18, 310/80, 310/96, 417/423.3International ClassificationF16D3/02, F04D13/02, H02K7/118, H02K7/06, F04B17/00Cooperative ClassificationF04D13/021, F16D3/02, H02K7/118European ClassificationH02K7/118, F04D13/02B, F16D3/02Legal EventsDateCodeEventDescriptionOct 24, 2013FPAYFee paymentYear of fee payment: 12Nov 3, 2009FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services