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WO2002066854A1 - Ressort a lames et verin electromagnetique pourvu de ce ressort a lames - Google Patents

Ressort a lames et verin electromagnetique pourvu de ce ressort a lames Download PDF

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Publication number
WO2002066854A1
WO2002066854A1 PCT/NL2002/000113 NL0200113W WO02066854A1 WO 2002066854 A1 WO2002066854 A1 WO 2002066854A1 NL 0200113 W NL0200113 W NL 0200113W WO 02066854 A1 WO02066854 A1 WO 02066854A1
Authority
WO
WIPO (PCT)
Prior art keywords
fastening part
leaf spring
zone
central
clearance
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.)
Ceased
Application number
PCT/NL2002/000113
Other languages
English (en)
Other versions
WO2002066854A8 (fr
Inventor
Arthur Perry Berkhoff
Rene Louis Christiaan Lemmen
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.)
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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 Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO filed Critical Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Publication of WO2002066854A1 publication Critical patent/WO2002066854A1/fr
Anticipated expiration legal-status Critical
Publication of WO2002066854A8 publication Critical patent/WO2002066854A8/fr
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/32—Belleville-type springs
    • F16F1/324—Belleville-type springs characterised by having tongues or arms directed in a generally radial direction, i.e. diaphragm-type springs
    • F16F1/326—Belleville-type springs characterised by having tongues or arms directed in a generally radial direction, i.e. diaphragm-type springs with a spiral-like appearance

Definitions

  • Leaf spring and electromagnetic actuator provided with a leaf spring.
  • the present invention relates to a leaf spring, such as, in particular, for an electromagnetic actuator, wherein the leaf spring as a whole is formed from a disc of plate- shaped, resilient material, and wherein the leaf spring comprises: a central fastening part; an outer fastening part extending at a distance from the central fastening part around the fastening part; and at least two leaf spring arms connecting the central and outer fastening part.
  • Such a leaf spring is known from the German Offenlegungsschrift DE 198,23,716.
  • the leaf spring known therefrom shown in particular in Fig. 3, has three leaf spring arms extending in a spiral shape from the centre to an outer ring.
  • the drawback of this known leaf spring is that at the transition of the leaf spring arms into, on the one side, the centre and, on the other side, the circumferential ring, during use, large tension peaks will occur and that in that transition area, this known leaf spring will be susceptible to fatigue tears as a consequence of the rather sharp bends which are made by the side edges of the leaf spring arms.
  • the present invention intends to provide an improved leaf spring of the type mentioned in the opening paragraph, which, with a relatively compact construction, allows leaf spring arms with a relatively great length, which has a long life span, and in particular, which has a limited susceptibility to formation of fatigue tears under the influence of internal material stresses occurring during use.
  • the object referred to can be achieved in two ways, starting from the same, common basic principle.
  • This common basic principle is that one allows the leaf spring arm, proceeding from the one fastening part to the other fastening part, to, first, cross as far as that other fastening part but for a clearance, to, then, have the leaf spring arm, without it coming into contact with the other fastening part and proceeding in tangential direction, bend back to the one fastening part, but for a second clearance.
  • a wide bend in particular a wide inner bend is provided instead of a sharp inner bend as is the case in DE- 19823716 - which leads to, on the one hand, more limited internal material stresses during use and, on the other hand, to a relatively long leaf spring arm.
  • the first or third zone has a radial main extending direction.
  • a radial main extending direction is that, when the extending direction of the first or third zone is divided into in a radial and tangential component, the radial component is the larger component and is preferably at least 40% greater than the tangential component.
  • the size of the first and/or the second clearance in radial direction is less than 25%, preferably less than 15%, such as, approximately 10%, of the radial distance from the central fastening part to the outer fastening part.
  • the size of the first and/or second clearance will preferably be greater than approximately 2.5% of the radial distance from the central fastening part to the outer fastening part.
  • the minimum size of the clearance is of importance to prevent contact between the leaf spring arm via the respective clearance when, during use, forces act on the central and outer fastening part which have the tendency to, locally, cause the two fastening parts to move towards each other. According to a different advantageous embodiment, all this can be expressed in a more absolute way and it is preferred, then, that the size of the first and/or second clearance in radial direction be less than 5 mm, such as approximately 3.5 mm, and preferably at least 0.5 mm, such as 1 mm.
  • the side of the first zone proximal to the second zone extends with a first radius of curvature (V) which, in approximation or not so, meets the following relation:
  • V (A - R - D)/2
  • A the radial distance between the central and outer fastening part measured through the centre of the first radius of curvature
  • R the radial size of the first clearance
  • the first radius of curvature (V) extends over an angular range larger than 200°, preferably a range of 215° to 245°, such as, approximately 230°.
  • the second radius of curvature (W) extends over an angular range of approximately 180°.
  • W the second radius of curvature
  • the leaf spring arms are aligned and are evenly arranged around the central fastening part.
  • a uniform distribution of spring forces is achieved.
  • the leaf spring comprises three, four, five or six spring arms.
  • the leaf spring with three or four spring arms will be most preferred.
  • Three or four spring arm still allow a good, relatively even distribution of spring forces over the circumference of the central fastening zone while, on the other hand, they still allow relatively long leaf spring arms.
  • the width of the leaf spring arm in the first and/or second zone is greater than or equal to the width of the second zone, viewed transversely to the extending direction.
  • the invention relates to an electromagnetic actuator, comprising a first actuator part and a second actuator part, which are connected to each other by means of suspension means allowing mutual movement, characterized in that the suspension means comprise one or more leaf springs according to the invention.
  • the electromagnetic actuator according to the invention has further suspension means in the form of one or more coil springs which extend perpendicularly to at least one of the leaf springs through that leaf spring.
  • Fig. 1 shows a schematic representation of an electromagnetic actuator according to the invention in cross-sectional, partial front view
  • Fig. 2 shows a top plan view of a leaf spring according to the invention
  • Fig. 3 shows a detail in longitudinal section of a view in part of a variant of the electromagnetic actuator according to Fig. 1.
  • Fig. 1 shows, in cross-sectional partial front view an actuator 1 according to the invention.
  • the actuator 1 consists of a fixed part 2 and a moving part 15 received therein.
  • the moving part 15 can optionally be connected to the outside world with a first rod 12 and, optionally, a second rod 13. With for instance a so-called "shaker", the rods 12, 13 can be completely omitted.
  • a vibration for instance from the outside, can act on rod 12 and/or 13, which vibration has to be actively damped by the actuator 1. It is also conceivable to impose a vibration departing from the actuator 1, via the rods 12 and/or 13 onto the outside world.
  • the fixed part 2 can be connected to the outside world via flange 8.
  • the fixed part 2 can also function as a moving part, while the moving part 15 can also function as fixed part. All this will be dependent on the manner in which the actuator 1 is connected to the outside world.
  • the fixed part 2 consists of a core 3 of non-magnetic material having thereon three coils 4, 5 and 6, and, around these coils 4, 5 and 6, a shell 7.
  • the electromagnetic coils 4 and 6 are oriented identically and the coil 5 is orientated in precisely the opposite way.
  • Such a configuration of coils can be achieved with a suitable connection to an electric source.
  • this orientation can also be achieved by winding the coils 4, 5 and 6 from one and the same wire and by making the winding direction of the coils 4 and 6 identical and the winding direction of coil 5 precisely opposite.
  • the wire from which the coils 4, 5 6 have been wound will be a metal wire, preferably a copper wire or aluminum wire.
  • the shell 7 is manufactured from a ferromagnetic material, for instance a suitable type of steel.
  • the core 3 is of a cylindrical hollow design.
  • the core 3 can have an oval, square, rectangular and differently shaped hollow cross section.
  • the moving part 15 of the actuator 1 is received in the hollow core 3.
  • This moving part 15 consists of two permanent magnets, 9, the upper one in Fig. 1, and 10, the lower one in Fig. 1.
  • the lower permanent magnet 10 has its South pole turned downwards and North pole turned upwards and the upper permanent magnet 9 has its South pole turned upwards and North pole turned downwards. It is of primary importance that the permanent magnet 9 and 10 have their equivalent poles turned towards each other, although also configurations are conceivable where the non-equivalent poles are turned towards each other. Between the magnets 9 and 10 there is a disc of ferromagnetic material.
  • the springs 20 are leaf springs. On the one side, the leaf springs 20 are fixedly connected to the rods 13 and 12, respectively, and on the other side to the core 3. At the upper side and the lower side, the moving part 15 of the actuator 1 is further provided with a ferromagnetic disc 16 and 17.
  • the distance 'd' is the distance from the moving part 15 of the actuator to the ferromagnetic shell 7.
  • the leaf spring 20 is essentially of circular appearance. However, it is noted that, although a circular appearance is preferred, the leaf spring according to the invention can also have an elliptic or oval shape.
  • the leaf spring 20 is essentially built up from three parts.
  • the central fastening part 21 is provided with a central passage 33 through which the rod 12 or 13 can extend. Further, the central fastening part 21 is provided with bolt passages 31 to enable the leaf spring 20 to be screwed to the moving actuator part 15 by means of bolts, as is schematically represented in Fig. 1 and 3 with reference numeral 34.
  • the leaf spring 20 has an outer fastening part 22 which is also ring-shaped, elliptical or oval.
  • the outer fastening part 22 is provided with bolt passages 32 for, as is schematically indicated in Figs. 1 and 3 with 35, securing the leaf spring 20 to the fixed actuator part 2 by means of bolts.
  • leaf spring arms 23 extend between the central fastening part 21 and the outer fastening part 22, leaf spring arms 23 extend. Each leaf spring arm 23 is built up from a first zone 24 originating from the central fastening part 21, which merges into a second zone 25 which merges into a third zone 26, which originates from the outer fastening part 22.
  • the first zone 24 extends from the central fastening part 21 initially in radial direction to a point near to the outer fastening part 22 while leaving a first clearance R clear.
  • the first zone 21 merges into a second zone 25 which extends roughly - not exactly — in tangential direction then, to bend back to the central fastening part as far as a point at a distance the size of a second clearance T, then to merge into a third zone 26 which essentially extends radially towards the outer fastening part 22.
  • this radius of curvature V can be defined as:
  • V (A - D - R)/2
  • the geometry of the inside bends at the transition of the second to the third zone and to the outer fastening part 22 can be defined.
  • this inside bend will extend over an angular range ⁇ of approximately 180° and, given the fixed transverse width D of the second zone, radial intermediate distance A between the central fastening part 21 and the outer fastening part 22 and dimension of the clearance T can be defined as:
  • coil springs 30 can extend transversely to the leaf spring 20 through that leaf spring, more preferably so at the location of the inside bend from the second zone to the third zone but, optionally also, or instead, at the location of the inside bend from the first zone to the second zone (coil springs 60). All this is schematically indicated in particular in Fig. 3.
  • a closing end 36 is to be provided on the core 3, which can be attached by the same bolts 35 with which the leaf spring 20 has been attached and which can support the springs 30 on the inside.
  • a closing end 36 with springs 30 can be provided at an axial end or at both axial ends of the actuator.
  • an actuator according to the invention instead of, each time, having the one leaf spring 20 at the bottom side and the top side, can also be provided at that bottom side and top side with a number of superposed leaf springs, which will preferably be kept at some mutual distance by a respective distancing element to prevent mutual frictional effects.
  • the superposed leaf springs can also be mutually connected by means of a (visco) elastic layer so that a laminate is formed of one or more layers of leaf springs and elastic material.
  • the soft elastic intermediate layers "follow" the deformation of the leaf springs and thus, in an effective manner, damp possible resonances in the leaf springs.
  • the leaf springs do not form part or will not form part of the magnetic circuit of the actuator, at least will not influence the circuit, it is preferred to make the leaf spring of a non-magnetic and non-magnetizable material, such as phosphor bronze or beryllium copper.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

L'invention concerne un ressort à lames pour un vérin électromagnétique ainsi que ce vérin électromagnétique. Le ressort à lames est constitué en tant qu'ensemble d'un disque en un matériau élastique en forme de plaque. Le ressort à lames comprend une partie centrale d'accrochage, une partie extérieure d'accrochage entourant la partie centrale d'accrochage et au moins deux bras de ressort à lames disposés entre la partie centrale d'accrochage et la partie extérieure d'accrochage. Vus depuis la partie centrale d'accrochage, les bras de ressort à lames (23) présentent une première zone (24) partant de la partie centrale d'accrochage (21), laquelle zone s'étend jusqu'à la partie extérieure d'accrochage (22), dont elle est séparée par un premier espace (R). La première zone (24) est suivie d'une seconde zone (25) qui, sans entrer en contact avec la partie extérieure d'accrochage (22), se prolonge dans une direction tangentielle, forme un coude, puis revient vers la partie centrale d'accrochage (21), dont elle est séparée par un second espace (T). Dans une troisième zone (26), qui prolonge la seconde zone (25), les bras de ressort à lames (23) s'étendent jusqu'à la partie extérieure d'accrochage (22) et viennent se joindre à cette dernière.
PCT/NL2002/000113 2001-02-22 2002-02-22 Ressort a lames et verin electromagnetique pourvu de ce ressort a lames Ceased WO2002066854A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1017427A NL1017427C2 (nl) 2001-02-22 2001-02-22 Bladveer en elektromagnetische actuator voorzien van een bladveer.
NL1017427 2001-02-22

Publications (2)

Publication Number Publication Date
WO2002066854A1 true WO2002066854A1 (fr) 2002-08-29
WO2002066854A8 WO2002066854A8 (fr) 2003-11-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2002/000113 Ceased WO2002066854A1 (fr) 2001-02-22 2002-02-22 Ressort a lames et verin electromagnetique pourvu de ce ressort a lames

Country Status (2)

Country Link
NL (1) NL1017427C2 (fr)
WO (1) WO2002066854A1 (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004055838A1 (fr) * 2002-12-13 2004-07-01 Gesellschaft Zur Förderung Angewandter Opik, Optoelektronik, Quantenelektronik Und Spektroskopie E.V. Moteur de commande pour mouvements de réglage axiaux
US7115112B2 (en) 2002-09-02 2006-10-03 Unomedical A/S Device for subcutaneous administration of a medicament to a patient and tubing for same
US7147623B2 (en) 2002-02-12 2006-12-12 Unomedical A/S Infusion device with needle shield
US7258680B2 (en) 2002-09-02 2007-08-21 Unomedical A/S Device for subcutaneous administration of a medicament to a patient
USD554253S1 (en) 2003-10-15 2007-10-30 Unomedical A/S Medical infusion device
USD576267S1 (en) 2003-10-15 2008-09-02 Unomedical A/S Medical infusion device
USD579541S1 (en) 2003-10-15 2008-10-28 Unomedical A/S Medical insertion device
US7481794B2 (en) 2003-02-12 2009-01-27 Unomedical A/S Cover
US7594909B2 (en) 2002-09-02 2009-09-29 Unomedical, A/S Apparatus and method for adjustment of the length of an infusion tubing
US7621395B2 (en) 2005-06-28 2009-11-24 Unomedical A/S Packing for infusion set and method of applying an infusion set
US7648494B2 (en) 2004-03-26 2010-01-19 Unomedical A/S Infusion set and injector device for infusion set
US7654484B2 (en) 2002-09-02 2010-02-02 Unomedical A/S Apparatus for and a method of adjusting the length of an infusion tube
US7802824B2 (en) 2002-11-26 2010-09-28 Unomedical A/S Connecting piece for a tubing
US7867199B2 (en) 2004-12-10 2011-01-11 Unomedical A/S Inserter
US8062250B2 (en) 2004-08-10 2011-11-22 Unomedical A/S Cannula device
USD655807S1 (en) 2005-12-09 2012-03-13 Unomedical A/S Medical device
US8152771B2 (en) 2001-09-27 2012-04-10 Unomedical A/S Injector device for placing a subcutaneous infusion set
WO2013010234A1 (fr) * 2011-07-19 2013-01-24 Whirpool S.A. Ressort à lames et compresseur muni d'un ressort à lames
US10369277B2 (en) 2005-09-12 2019-08-06 Unomedical A/S Invisible needle
US11486535B2 (en) 2020-06-25 2022-11-01 Microsoft Technology Licensing, Llc Compact leaf spring assemblies
US12092092B2 (en) 2022-01-04 2024-09-17 Haier Us Appliance Solutions, Inc. Linear compressor and planar spring assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2100831A1 (de) * 1971-01-09 1972-07-20 Samson Apparatebau Ag Einstellfeder für Meß- und Regelgeräte
DE7015469U (de) * 1970-04-24 1972-08-03 Stromag Maschf Membran, als elastisches verbindungsglied zweier miteinander zu kuppelnder teile.
US3718900A (en) * 1970-04-15 1973-02-27 Mark Products Seismometer with spring spider suspension
FR2348058A1 (fr) * 1976-04-14 1977-11-10 Radiotechnique Compelec Electro-aimants a ressort membrane pour imprimantes mosaique
US4685094A (en) * 1984-11-30 1987-08-04 Geosource Inc. Lateral compliance device for geophone springs
DE19823716A1 (de) * 1998-05-27 1999-12-02 Btr Avs Technical Centre Gmbh Aktiver Schwingungstilger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718900A (en) * 1970-04-15 1973-02-27 Mark Products Seismometer with spring spider suspension
DE7015469U (de) * 1970-04-24 1972-08-03 Stromag Maschf Membran, als elastisches verbindungsglied zweier miteinander zu kuppelnder teile.
DE2100831A1 (de) * 1971-01-09 1972-07-20 Samson Apparatebau Ag Einstellfeder für Meß- und Regelgeräte
FR2348058A1 (fr) * 1976-04-14 1977-11-10 Radiotechnique Compelec Electro-aimants a ressort membrane pour imprimantes mosaique
US4685094A (en) * 1984-11-30 1987-08-04 Geosource Inc. Lateral compliance device for geophone springs
DE19823716A1 (de) * 1998-05-27 1999-12-02 Btr Avs Technical Centre Gmbh Aktiver Schwingungstilger

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8162892B2 (en) 2001-09-27 2012-04-24 Unomedical A/S Injector device for placing a subcutaneous infusion set
US8172805B2 (en) 2001-09-27 2012-05-08 Unomedical A/S Injector device for placing a subcutaneous infusion set
US8152771B2 (en) 2001-09-27 2012-04-10 Unomedical A/S Injector device for placing a subcutaneous infusion set
US7147623B2 (en) 2002-02-12 2006-12-12 Unomedical A/S Infusion device with needle shield
US7594909B2 (en) 2002-09-02 2009-09-29 Unomedical, A/S Apparatus and method for adjustment of the length of an infusion tubing
US7115112B2 (en) 2002-09-02 2006-10-03 Unomedical A/S Device for subcutaneous administration of a medicament to a patient and tubing for same
US7258680B2 (en) 2002-09-02 2007-08-21 Unomedical A/S Device for subcutaneous administration of a medicament to a patient
US7654484B2 (en) 2002-09-02 2010-02-02 Unomedical A/S Apparatus for and a method of adjusting the length of an infusion tube
US7802824B2 (en) 2002-11-26 2010-09-28 Unomedical A/S Connecting piece for a tubing
WO2004055838A1 (fr) * 2002-12-13 2004-07-01 Gesellschaft Zur Förderung Angewandter Opik, Optoelektronik, Quantenelektronik Und Spektroskopie E.V. Moteur de commande pour mouvements de réglage axiaux
US7481794B2 (en) 2003-02-12 2009-01-27 Unomedical A/S Cover
USD579541S1 (en) 2003-10-15 2008-10-28 Unomedical A/S Medical insertion device
USD576267S1 (en) 2003-10-15 2008-09-02 Unomedical A/S Medical infusion device
USD554253S1 (en) 2003-10-15 2007-10-30 Unomedical A/S Medical infusion device
US8221355B2 (en) 2004-03-26 2012-07-17 Unomedical A/S Injection device for infusion set
US7648494B2 (en) 2004-03-26 2010-01-19 Unomedical A/S Infusion set and injector device for infusion set
US8062250B2 (en) 2004-08-10 2011-11-22 Unomedical A/S Cannula device
US7867200B2 (en) 2004-12-10 2011-01-11 Unomedical A/S Inserter
US7867199B2 (en) 2004-12-10 2011-01-11 Unomedical A/S Inserter
US7621395B2 (en) 2005-06-28 2009-11-24 Unomedical A/S Packing for infusion set and method of applying an infusion set
US10369277B2 (en) 2005-09-12 2019-08-06 Unomedical A/S Invisible needle
USD655807S1 (en) 2005-12-09 2012-03-13 Unomedical A/S Medical device
USD682415S1 (en) 2005-12-09 2013-05-14 Unomedical A/S Medical device
WO2013010234A1 (fr) * 2011-07-19 2013-01-24 Whirpool S.A. Ressort à lames et compresseur muni d'un ressort à lames
CN103765008A (zh) * 2011-07-19 2014-04-30 惠而浦股份有限公司 板簧和具有板簧的压缩机
CN103765008B (zh) * 2011-07-19 2016-07-13 惠而浦股份有限公司 设置有板簧的往复式压缩机
US11486535B2 (en) 2020-06-25 2022-11-01 Microsoft Technology Licensing, Llc Compact leaf spring assemblies
US12092092B2 (en) 2022-01-04 2024-09-17 Haier Us Appliance Solutions, Inc. Linear compressor and planar spring assembly

Also Published As

Publication number Publication date
NL1017427C2 (nl) 2002-08-23
WO2002066854A8 (fr) 2003-11-13

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