NL1038937C2 - Piezo based inertial cam drive. - Google Patents

Piezo based inertial cam drive. Download PDF

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Publication number
NL1038937C2
NL1038937C2 NL1038937A NL1038937A NL1038937C2 NL 1038937 C2 NL1038937 C2 NL 1038937C2 NL 1038937 A NL1038937 A NL 1038937A NL 1038937 A NL1038937 A NL 1038937A NL 1038937 C2 NL1038937 C2 NL 1038937C2
Authority
NL
Netherlands
Prior art keywords
actuators
piezo
cam
bearing
cam follower
Prior art date
Application number
NL1038937A
Other languages
Dutch (nl)
Inventor
Hubertus Leonardus Mathias Marie Janssen
Hendrikus Sophia Jacques Craenen
Maurice Anton Jacques Teuwen
Original Assignee
Janssen Prec Engineering B V
Hubertus Leonardus Mathias Marie Janssen
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 Janssen Prec Engineering B V, Hubertus Leonardus Mathias Marie Janssen filed Critical Janssen Prec Engineering B V
Priority to NL1038937A priority Critical patent/NL1038937C2/en
Application granted granted Critical
Publication of NL1038937C2 publication Critical patent/NL1038937C2/en

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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
    • H02N2/12—Constructional details
    • H02N2/123—Mechanical transmission means, e.g. for gearing
    • H02N2/126—Mechanical transmission means, e.g. for gearing for conversion into linear motion

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  • Transmission Devices (AREA)

Description

Piezo based inertial cam drive
The invention concerns a device for realisation of a linear movement of a load.
5 The invention concerns the introduction of piezoactuators that connect two concentric bodies of which the inner body is supported by a friction based bearing and the outer inertia body is free floating. The inner body is fixed to a curve shaped body or cam, supporting 10 a translational strut. By means of rapid expansion and retraction of the p i e z o - a c t u a t o r s , the cam will rotate in order to create a translational displacement of the strut.
Especially in the field of scientific research and 15 instruments, active adjustment of several, mostly optical, components is required.
In order to realize this, there are several piezo based solutions. Some of them are direct drive p i e z o - a c t u a t o r s 20 based on stick / slip principles, but typically have limited force.
The invention concerns the introduction of a curve shaped body or cam to be rotated by a piezo based 25 inertia drive. The system is equipped with 3 piezoactuators which make a connection between an inner ring and an outer ring. The idea is to connect the inner ring with a curved cam or excentric cylinder while the outer inertia ring is free floating.
30 If we apply a “tooth shaped” voltage to the piezo’s, the piezo’s will apply acceleration forces on the outer ring that acts as a moment of inertia.
1038937 2
In this way a rotational moment will be applied on the inner ring and the corresponding cam will rotate and thereby creates a linear displacement of the translational strut.
5
The exact nature of this invention, as well as its objectives become clear in the accompanying drawings wherein: 10 Fig.1 Is a drawing of the piezo based inertial cam drive.
In figure 1 the piezo based inertial drive is depicted.
The output translational strut 1 is supported via a roller 15 bearing 8 which is preloaded with spring 4 on the cam 2 which is supported by a pivot 5. The cam 2 is fixed to the inner body 6 and via piezo-actuators 7 connected to a free floating inertia body 3. If an electrical signal is applied to the piezo-actuators 7 in such way that 20 alternating high and low accelerations occur between the inner body 6 and the inertia body 3; the drive torque will alternatively go above and below the friction torque in pivot 5, and a net rotation of the cam 2 with respect to pivot 5 will occur, causing a translation of 25 the translational strut 1.
1038937

Claims (7)

1. De uitvinding betreft een inrichting met het kenmerk dat er een translatie kan worden uitgevoerd door 5 introductie van een met enige wrijving gelagerde geprofileerde nok met nokvolger, die door middel van een of meerdere piezo-actuatoren is verbonden met een vrij bewegende massa en waarvan de piezo-actuatoren elektrisch zodanig wordt aangestuurd dat 10 er alternerend hoge en lage versnellingen optreden die leiden tot een koppel op de nok dat hoger c.q. lager is dan het wr i j v i n g s k o p p e 1 in de lagering, waardoor er een netto rotatie optreedt van de nok ten opzichte van de lagering met de daarbij 15 behorende translatie van de nokvolger.1. The invention relates to a device characterized in that a translation can be carried out by introducing a profiled cam with some friction-bearing cam with cam follower, which is connected by means of one or more piezo-actuators to a freely moving mass and of which the piezo actuators are electrically controlled in such a way that alternately high and low accelerations occur which lead to a torque on the cam that is higher or lower than the frictional torque 1 in the bearing, whereby a net rotation of the cam takes place relative to the cam of the bearing with the associated translation of the cam follower. 2. Een inrichting volgens conclusie 1, met het kenmerk dat er geen vrij bewegende massa is, maar dat de geprofileerde nok doormiddel van piezo-actuatoren 20 is verbonden met een lichaam dat centrisch is gelagerd en een zodanige weerstand tegen rotatie ondervindt dat het systeem onder invloed van een lineaire belasting op de nokvolger niet gaat roteren.A device as claimed in claim 1, characterized in that there is no free-moving mass, but that the profiled cam is connected by means of piezo actuators 20 to a body which is mounted centrally and experiences such a resistance to rotation that the system influence of a linear load on the cam follower will not rotate. 3. Een inrichting volgens een der voorgaande conclusies waarbij de piezo-actuatoren zodanig zijn voorgespannen dat er geen trekkrachten in het p i e z o m a t e r i a a 1 ontstaan.3. A device according to any one of the preceding claims, wherein the piezo actuators are prestressed in such a way that no tensile forces arise in the p i e z o m a to e 1. 4. Een inrichting volgens een der voorgaande conclusies waarbij in plaats van translerende piezo-actuatoren gebruik van afschuivende piezo-actuatoren wordt gemaakt. 1038937A device according to any one of the preceding claims, wherein instead of translating piezo actuators use is made of shearing piezo actuators. 1038937 5. Een inrichting volgens een der voorgaande conclusies waarbij in plaats van p i e z o - a c tu a t o r e n gebruik wordt gemaakt van actuatoren op basis van 5 e 1 e k t r o s t r i c t i e f of m a g n e t o s t r i c t i e f materiaal of actuatoren op basis van elektromagnetische, pneumatische o f h y d r a u 1 i s c h e principes.5. A device according to any one of the preceding claims, wherein instead of p i e z o - a c tu a t a r e use is made of actuators on the basis of material or actuators based on electromagnetic, pneumatic or pneumatic principles. 6. Een inrichting volgens een der voorgaande 10 conclusies waarbij de s t r o o m v e r z o r g i n g van de piezo - actuatoren door middel van sleepcontacten wordt gerealiseerd.6. A device according to any one of the preceding claims, wherein the piezo-actuators of the piezo-actuators are realized by means of sliding contacts. 7. Een inrichting volgens een der voorgaande 15 conclusies waarbij de stroomverzorging door middel van een elektrische kabel wordt verzorgd die is opgerold en daardoor de mogelijkheid biedt om diverse omwentelingen te maken. 20 1 0 3 8 9 3 77. A device according to any one of the preceding claims, wherein the power supply is provided by means of an electric cable which is rolled up and therefore offers the possibility of making various revolutions. 20 1 0 3 8 9 3 7
NL1038937A 2011-07-11 2011-07-11 Piezo based inertial cam drive. NL1038937C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL1038937A NL1038937C2 (en) 2011-07-11 2011-07-11 Piezo based inertial cam drive.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1038937A NL1038937C2 (en) 2011-07-11 2011-07-11 Piezo based inertial cam drive.
NL1038937 2011-07-11

Publications (1)

Publication Number Publication Date
NL1038937C2 true NL1038937C2 (en) 2013-01-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
NL1038937A NL1038937C2 (en) 2011-07-11 2011-07-11 Piezo based inertial cam drive.

Country Status (1)

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NL (1) NL1038937C2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010017497A1 (en) * 2000-02-25 2001-08-30 Dobson Simon Blair Linear displacement actuator
US20040080243A1 (en) * 2002-03-11 2004-04-29 Osamu Miyazawa Rotation/displacement converting actuator
US6765334B1 (en) * 1999-09-21 2004-07-20 Seiko Instruments Inc. Linear or pivotal motion mechanism using ultrasonic motor and electronic device equipped with linear or pivotal motion mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6765334B1 (en) * 1999-09-21 2004-07-20 Seiko Instruments Inc. Linear or pivotal motion mechanism using ultrasonic motor and electronic device equipped with linear or pivotal motion mechanism
US20010017497A1 (en) * 2000-02-25 2001-08-30 Dobson Simon Blair Linear displacement actuator
US20040080243A1 (en) * 2002-03-11 2004-04-29 Osamu Miyazawa Rotation/displacement converting actuator

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee

Effective date: 20150201