CA2476347A1 - Apparatus for moving a pair of opposing surfaces in response to an electrical activation - Google Patents

Apparatus for moving a pair of opposing surfaces in response to an electrical activation Download PDF

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Publication number
CA2476347A1
CA2476347A1 CA002476347A CA2476347A CA2476347A1 CA 2476347 A1 CA2476347 A1 CA 2476347A1 CA 002476347 A CA002476347 A CA 002476347A CA 2476347 A CA2476347 A CA 2476347A CA 2476347 A1 CA2476347 A1 CA 2476347A1
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CA
Canada
Prior art keywords
actuator
planar
transfer member
force transfer
rigid
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.)
Granted
Application number
CA002476347A
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French (fr)
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CA2476347C (en
Inventor
Jeff Moler
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.)
Viking Technologies L C
Original Assignee
Viking Technologies, L. C.
Jeff Moler
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Filing date
Publication date
Application filed by Viking Technologies, L. C., Jeff Moler filed Critical Viking Technologies, L. C.
Publication of CA2476347A1 publication Critical patent/CA2476347A1/en
Application granted granted Critical
Publication of CA2476347C publication Critical patent/CA2476347C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/12—Pivotal connections incorporating flexible connections, e.g. leaf springs
    • 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
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H02N2/04—Constructional details
    • H02N2/043—Mechanical transmission means, e.g. for stroke amplification

Abstract

An apparatus for moving a pair of opposing surfaces in response to an electrical activation having a support including a rigid non-flexing portion (16), at least one pivotable arm portion (18, 20) extending from the rigid non-flexing portion, a pair of opposing surfaces with one opposing surface (22, 24) on the at least one pivotable arm portion (18, 20) for movement relative to one another, and a force transfer member (26) operably positioned for driving the at least one pivotable arm portion in rotational movement. An actuator (14) is operably engaged between the rigid portion (16) and the force transfer member (26) to drive the force transfer member in movement relative to the rigid portion to pivot the at least one pivotable arm portion in response to an electrical activation of the actuator.

Claims (22)

1. An apparatus for moving at least one of a pair of opposing surfaces in response to an electrical activation comprising:
a support including a rigid non-flexing portion, at least one pivotable arm portion extending from the rigid portion, a pair of opposing surfaces with one opposing surface on the at least one pivotable arm portion for movement relative to one another, and a force transfer member operably positioned for driving the at least one pivotable arm portion in rotational movement; and an actuator operably engaged between the rigid portion and the force transfer member to drive the force transfer member relative to the rigid portion to pivot the at least one pivotable arm portion in response to an electrical activation of the actuator.
2. The apparatus of claim 1 wherein the support is a single piece.
3. The apparatus of claim 1 wherein the actuator is a piezoelectric device.
4. The apparatus of claim 1 wherein the rigid portion is C-shaped including a web extending between a pair of rigid arm portions.
5. The apparatus of claim 4 wherein one of the pivotable arm portions is pivotably connected to one of the rigid arm portions and the other of the pivotable arm portions is pivotably connected to the other of the rigid arm portions.
6. The apparatus of claim 1 wherein the actuator includes opposite ends and produces a spatial displacement between the opposite ends in response to an electrical activation.
7. The apparatus of claim 6 wherein the rigid portion supports a seat surface.
8. The apparatus of claim 7 wherein one of the opposite ends of the actuator is a planar surface and the seat surface supported by the rigid portion is a planar surface with the planar end surface of the actuator disposed adjacent to the planar seat surface supported by the rigid portion.
9. The apparatus of claim 8 wherein the planar end surface of the actuator applies force to the planar seat surface supported by the rigid portion in response to a spatial displacement of the actuator.
10. The apparatus of claim 9 wherein the planar end surface of the actuator operably contacts the planar seat surface supported by the rigid portion at a minimum operating spatial displacement of the actuator.
11. The apparatus of claim 9 wherein the planar end surface of the actuator operably contacts the planar seat surface supported by the rigid portion at a maximum operating spatial displacement of the actuator.
12. The apparatus of claim 9 wherein the planar end surface of the actuator operably contacts the planar seat surface supported by the rigid portion at all spatial displacements between a minimum operating spatial displacement of the actuator and a maximum operating spatial displacement of the actuator.
13. The apparatus of claim 1 wherein the force transfer member includes a seat surface.
14. The apparatus of claim 13 wherein one of the opposite ends of the actuator is a planar surface and the seat surface of the force transfer member is a planar surface with the planar end surface of the actuator disposed adjacent to the planar seat surface of the force transfer member.
15. The apparatus of claim 14 wherein the planar end surface of the actuator applies force to the planar seat surface of the force transfer member in response to a spatial displacement of the actuator.
16. The apparatus of claim 15 wherein the planar end surface of the actuator operably contacts the planar seat surface of the force transfer member at a minimum operating spatial displacement of the actuator.
17. The apparatus of claim 15 wherein the planar end surface of the actuator operably contacts the planar seat surface of the force transfer member at a maximum operating spatial displacement of the actuator.
18. The apparatus of claim 15 wherein the planar end surface of the actuator operably contacts the planar seat surface of the force transfer member at all spatial displacements between a minimum operating spatial displacement of the actuator and a maximum operating spatial displacement of the actuator.
19. The apparatus of claim 1 wherein the rigid portion, the pivotable arm portion and the force transfer member meet at one location to form a force transfer mechanism.
20. The apparatus of claim 2 further comprising an integral spring defined where at least one pivotable portion attaches to the rigid portion.
21. A method for optimizing hinge geometry comprising the steps of:
developing preliminary geometry based on defined force and displacement requirements;

performing two dimensional stress analysis to optimize orientation of hinge geometry;
designing a three dimensional model of the optimized orientation of the hinge geometry;
conducting finite element stress analysis on the three dimensional model to predict performance;
analyzing separate curves for force versus displacement for a support and a piezoelectric actuator;
identifying an intersection of the curves;
determining if the intersection of the curves satisfies the predefined force and displacement requirements;
if the intersection of the curves does not satisfy the predefined force and displacement requirements, returning to the developing step;
if the intersection of the curves does satisfy the predefined force and displacement requirements, conducting finite element stress analysis of the three dimensional model using values corresponding to the intersection of the curves;
determining if performance of the three dimensional model with finite element stress analysis using values corresponding to the intersection of the curves is verified against application requirements; and if performance is not verified, returning to the developing step.
22. An apparatus according to the method of claim 21 for moving at least one of a pair of opposing surfaces in response to an electrical activation comprising:
a support including a rigid non-flexing portion, at least one pivotable arm portion extending from the rigid portion, a pair of opposing surfaces with one opposing surface on the at least one pivotable arm portion for movement relative to one another, and a force transfer member operably positioned for driving the at least one pivotable arm portion in rotational movement; and an actuator operably engaged between the rigid portion and the force transfer member to drive the force transfer member relative to the rigid portion to pivot the at least one pivotable arm portion in response to an electrical activation of the actuator.
CA2476347A 2002-02-06 2003-01-22 Apparatus for moving a pair of opposing surfaces in response to an electrical activation Expired - Fee Related CA2476347C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/067,762 US6879087B2 (en) 2002-02-06 2002-02-06 Apparatus for moving a pair of opposing surfaces in response to an electrical activation
US10/067,762 2002-02-06
PCT/US2003/001850 WO2003067674A2 (en) 2002-02-06 2003-01-22 Apparatus for moving a pair of opposing surfaces in response to an electrical activation

Publications (2)

Publication Number Publication Date
CA2476347A1 true CA2476347A1 (en) 2003-08-14
CA2476347C CA2476347C (en) 2010-11-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2476347A Expired - Fee Related CA2476347C (en) 2002-02-06 2003-01-22 Apparatus for moving a pair of opposing surfaces in response to an electrical activation

Country Status (7)

Country Link
US (3) US6879087B2 (en)
EP (1) EP1472746A2 (en)
JP (1) JP2006507784A (en)
CN (1) CN1647291B (en)
AU (1) AU2003210602A1 (en)
CA (1) CA2476347C (en)
WO (1) WO2003067674A2 (en)

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AU2003210602A1 (en) 2003-09-02
WO2003067674A3 (en) 2003-12-04
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CN1647291A (en) 2005-07-27
US6975061B2 (en) 2005-12-13
CN1647291B (en) 2011-05-18
US20030193266A1 (en) 2003-10-16
US6879087B2 (en) 2005-04-12
US6870305B2 (en) 2005-03-22
JP2006507784A (en) 2006-03-02
US20050073220A1 (en) 2005-04-07
US20040207294A1 (en) 2004-10-21
CA2476347C (en) 2010-11-16

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