EP0613586A1 - Moteur rotatif piezoelectrique - Google Patents

Moteur rotatif piezoelectrique

Info

Publication number
EP0613586A1
EP0613586A1 EP93920784A EP93920784A EP0613586A1 EP 0613586 A1 EP0613586 A1 EP 0613586A1 EP 93920784 A EP93920784 A EP 93920784A EP 93920784 A EP93920784 A EP 93920784A EP 0613586 A1 EP0613586 A1 EP 0613586A1
Authority
EP
European Patent Office
Prior art keywords
elements
expansion element
piezo
stator
rotor
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.)
Withdrawn
Application number
EP93920784A
Other languages
German (de)
English (en)
Inventor
Hans Richter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0613586A1 publication Critical patent/EP0613586A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
    • H02N2/101—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors using intermittent driving, e.g. step motors

Definitions

  • the invention relates to a piezo rotary motor according to the preamble of claim 1.
  • Such a piezo rotary motor is described in JP-A-2-119 579.
  • a first arrangement of piezo elements and a second arrangement of piezo elements are shown, which are arranged alternately along the circumference of the rotor.
  • Each piezo element arrangement consists of an expansion element and two feed elements arranged thereon, the ends of which are arranged in grooves in the stator.
  • the spreading elements of the two piezo element arrangements are actuated in alternation with one another, the respectively actuated spreading elements coming into contact with the stator.
  • one feed element is then actuated in a contracting manner and the other in an expanding manner, while at the same time in the case of the non-actuated spreading elements one feed element is expanded and the other in a contracting manner.
  • the activated spreading elements lying against the stator are displaced so that the rotor is rotated step by step with respect to the stator.
  • This known arrangement has a number of disadvantages.
  • the rotary step of the rotor carried out in the respective cycle is relatively small and is determined by the expansion or contraction path of the feed elements assigned to each expansion element.
  • Another disadvantage of this known rotary motor is that the torque transmitted by the rotor is relatively low. The reason for this is that the spreading elements cannot be produced exactly identically and can be positioned on the rotor, so that when they are actuated they sometimes do not come into contact with the stator or only with little force against this stator press on so that the effect of the feed elements assigned to these expansion elements does not act on the rotor or only with slip.
  • the object is to improve this piezo-rotary motor in such a way that a high torque acts on the rotor and the angle of rotation which the rotor executes with each actuation cycle is nevertheless relatively large.
  • FIG. 1 shows a cross section through a first embodiment of a rotary motor along the line BB in FIG. 2;
  • FIG. 2 shows a section along the line AA in FIG. 1;
  • FIG. 3 shows a cross section through a second embodiment of a rotary motor along the line AA in FIG. 4;
  • stator and rotor are interchangeable, because the fixed part of the motor called the stator can also be the rotating part of the motor if the part called the rotor is fixed.
  • the stator 4 according to FIGS. 1 and 2 has two legs 13, 14 running parallel to one another and parallel to the axis of rotation 12. With the inside of the inner leg 14 an elastic ring 5 is rotatably connected via two diametrically opposed tongue and groove connections 6. Between this Ring 5 and the outer leg 13 runs the rotor 9, the driven part 8 protrudes beyond the inner leg 14 and is mounted there on the outer leg 13.
  • This rotor 9 supports two first spreading elements 1, 2 diametrically opposite one another and two second spreading elements 1 ', 1 "and 2', 2" on both sides of these two first spreading elements 1, 2. Seen in the circumferential direction, the first expansion elements 1, 2 are supported with play by the rotor 9, while the two second expansion elements 1 ', 1 "and 2', 2" are viewed in the circumferential direction without play from the rotor 9.
  • Two diametrically opposite abutments 11 are rigidly connected to the rotor 9, each of which forms an angle of 90 ° to the expansion elements 2. Between the two abutments 11 and the expansion elements 1, 2, two rows of feed elements are arranged, each having an equal number of feed elements 3 that are identical to one another. One row assigned to the expansion elements 1, 2 is designated 15 and the other row 16 in each case. Wedges 7 are provided between adjacent feed elements 3, so that the rows rest against the abutments 11 and the expansion elements 1, 2 without play.
  • the spreading elements 1, 1 ', 1 "or 2, 2', 2" lie against the elastic ring 5 if they are not activated.
  • the rotation motor works as follows:
  • the expansion elements 1, 2 are actuated, which expand with them and press against the elastic ring 5, deforming it, so that the expansion elements 1 ', 1 "and 2', 2" come out of contact with the ring 5 .
  • the two legs 13, 14 are thus non-positively connected to one another via the expansion elements 1, 2 and the ring 5.
  • the two rows 15 of the feed elements 3 are driven in an expanding manner, while the other two rows 16 are driven in a contracting manner, with which the abutment 11 and thus the rotor 9 can be turned clockwise.
  • the spreading elements 1 ', 1 "and 2', 2" also perform this rotation.
  • the spreading elements 1 ', 1 "and 2', 2" are actuated, which expand and now press against the ring 5 and deform it.
  • the control of the spreading elements 1, 2 is canceled, which frees them from the ring.
  • the rows 16 are now driven in an expanding manner and the rows 15 are driven in a contracting manner, with the expansion elements 1, 2 being rotated clockwise when the rotor 9 is at a standstill.
  • the cycle described above then begins with the actuation of the spreading elements 1, 2.
  • the rotor 9 is at a standstill when the spreading elements 1 ', 1 "and 2', 2" are activated. This can be avoided if feed elements 3 ', 3 "are also arranged between the spreading elements 1', 1" and 2 ', 2 "and the abutments 11 and the aforementioned spreading elements are also supported with play by the rotor 9 in the circumferential direction. While the non-loaded spreading elements 1, 2 are shifted clockwise from the rows 15, 16, the spreading elements 1 ', 1 "and 2', 2” clamp and the rows 15 ', 15 “expand and the rows 16', 16 "driven in a contracting manner, with which the abutment 11 and thus the rotor 9 are rotated clockwise. While the spreading elements 1, 2 clamp and the spreading elements 1 ', 1" and 2', 2 “are not activated, these are shifted clockwise, in which the rows 15 ', 15 "are contracted and the rows 16', 16" are driven to expand.
  • the elastic ring is connected in a rotationally fixed manner to the rotor 9 via diametrically opposed tongue and groove connections 6.
  • two first expansion element pairs 1, 2 are mounted and two second expansion element pairs 1 ', 2'.
  • the spreading element pairs 1, 2 are located between the spreading element pairs 1 ', 2'.
  • the pendulum axes 20 of the expansion elements 1, 2, 1 ', 2' are located on the outside of the aforementioned expansion elements, as seen from the axis of rotation 12.
  • a row 15 of feed elements 3 is arranged on one side of the expansion elements 1, 2, the last element of which is supported on the stator.
  • the stator support is designated 21.
  • a tappet 22 bears against the other side of the expansion elements 1, 2 and is pressed against the respective expansion element 1, 2 by plate springs 23 which are supported on the stator.
  • rows 15 'of feed elements 3' as well as plungers 22 and disc springs 23 are provided for the pairs of expansion elements 1 ', 2'.
  • rows of feed elements 3, 3 ' can also be provided, corresponding to the rows 16, 16' of the first embodiment, which, however, are also supported on a stator support 21.
  • the pairs of expansion elements 1, 2 are pivoted counterclockwise by the springs 23 against the rows 15.
  • the spreading driven elements 1 ', 2' causing them to expand and deform the ring 5.
  • the pivoted spreading elements 1, 2 are actuated, the actuation in the spreading elements 1 ', 2' is canceled and the feed elements 3 of the rows 15 are also actuated, so that the spreading elements 1, 2 perform a pivoting movement in a clockwise direction counter to the force Execute the springs 23 and take the rotor 9 with them, which thus executes a rotary movement in the counterclockwise direction.
  • the spreading elements 1 ', 2' are actuated, which were previously pivoted by the springs 23 and the control of the spreading elements 1, 2 and the associated feed elements 3 is canceled, so that the spreading elements 1 , 2 are again pivoted counterclockwise.
  • the feed elements 3 'of the rows 15' are actuated, whereby the spreading elements 1 ', 2' are pivoted clockwise and also take the rotor 9 with them in a counterclockwise direction.
  • a lever 24 is arranged, each of which is pivotally mounted on the outside of the stator 4.
  • the ends of the feed elements 3, 3 'facing the respective expansion element 1, 2, 1', 2 ' engage the levers at the bottom and the ends facing the respective stator support 21 at a greater distance from the pivot axis of the levers 24, thus correspondingly increasing the displacement path the lever ratios is reached, namely starting from the expansion element 3, 3 'on the stator support 21 and increasing to the respective expansion element 1, 2, 1', 2 '.
  • the control of the expansion elements 1, 2 and the feed elements 3, 3 ' can of course also take place in the reverse manner.
  • the expansion elements 1, 2 or 1 ', 2' are driven to expand while maintaining the aforementioned cycle sequence and at the same time the feed elements 3, 3 'contract, so that the Spreading elements are pivoted by the springs 23 and the driven spreading elements take the rotor 9 with them this time in a clockwise direction.

Landscapes

  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

L'invention concerne un moteur rotatif piézoélectrique qui comprend un stator (4) et un rotor (9). Son rotor (9) supporte un premier élément écarteur (1) et deux autres éléments écarteurs (1', 1'') entre deux branches (13, 14) du stator (4). Des rangées d'éléments d'avancement (3) sont supportées par le stator (9) des deux côtés du premier élément écarteur (1). Ces rangées reposent d'une part sur le premier élément écarteur (1) et sont d'autre part reliées au rotor (9). Un anneau (5) déformable est solidaire en rotation d'une des branches (14). Lorsque le premier élément écarteur (1) est excité, il provoque une déformation de l'anneau (5) et se trouve de ce fait maintenu entre les branches (13, 14). Simultanément une des rangées d'éléments d'avancement (3) est excitée et prend de l'expansion, alors que l'autre rangée est excitée et se contracte, ce qui fait que le rotor (9) est mis en rotation avec les deux éléments écarteurs (1', 1''). Puis les deux éléments écarteurs (1', 1'') sont excités et provoquent une déformation de l'anneau (5). L'excitation du premier élément écarteur (1) s'arrête et les rangées d'éléments d'avancement (3) sont excitées en opposition de phases par rapport à l'excitation précédente, ce qui fait que le premier élément écarteur (1) est déplacé par les éléments d'avancement (3).
EP93920784A 1992-09-21 1993-09-21 Moteur rotatif piezoelectrique Withdrawn EP0613586A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4231505 1992-09-21
DE4231505 1992-09-21
PCT/EP1993/002551 WO1994007271A1 (fr) 1992-09-21 1993-09-21 Moteur rotatif piezoelectrique

Publications (1)

Publication Number Publication Date
EP0613586A1 true EP0613586A1 (fr) 1994-09-07

Family

ID=6468424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93920784A Withdrawn EP0613586A1 (fr) 1992-09-21 1993-09-21 Moteur rotatif piezoelectrique

Country Status (3)

Country Link
EP (1) EP0613586A1 (fr)
JP (1) JPH07501680A (fr)
WO (1) WO1994007271A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015009833B3 (de) * 2015-08-03 2017-01-19 Kocks Technik Gmbh & Co Kg "Lager für einen Walzenzapfen einer Walze oder für eine Walzenwelle eines Walzgerüsts und Walzgerüst"

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19542452A1 (de) * 1995-11-14 1996-08-08 Wilhelm Koenig Translations - Rotations - Modul mit Multi-Piezo-Antrieb
DE19710601C2 (de) * 1997-03-14 1999-05-20 Univ Magdeburg Tech Bewegungsgenerator
DE102010035045A1 (de) 2010-08-20 2012-02-23 Aspre Ag Piezomotor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1071648A (en) * 1964-11-06 1967-06-07 Standard Telephones Cables Ltd Position control device
JPS5976184A (ja) * 1982-10-22 1984-05-01 Hitachi Ltd アクチユエ−タ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9407271A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015009833B3 (de) * 2015-08-03 2017-01-19 Kocks Technik Gmbh & Co Kg "Lager für einen Walzenzapfen einer Walze oder für eine Walzenwelle eines Walzgerüsts und Walzgerüst"

Also Published As

Publication number Publication date
JPH07501680A (ja) 1995-02-16
WO1994007271A1 (fr) 1994-03-31

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