This paper investigates the drawbacks of typical flexure connectors and presents several new designs for highly effective, kinematically well-behaved compliant joints. A revolute and a translational compliant joint are proposed, both of which offer great improvements over existing flexures in the qualities of (1) a large range of motion, (2) minimal “axis drift,” (3) increased off-axis stiffness, and (4) a reduced stress-concentrations. Analytic stiffness equations are developed for each joint and parametric computer models are used to verify their superior stiffness properties. A catalog of design charts based on the parametric models is also presented, allowing for rapid sizing of the joints for custom performance. A joint range of motion has been calculated with finite element analysis, including stress concentration effects.

1.
Paros
,
J. M.
, and
Weisbord
,
L.
, 1965, “
How to Design Flexure Hinges
,”
Mach. Des.
0024-9114,
37
(
27
), pp.
151
156
.
2.
Pernette
,
E.
,
Henein
,
S.
,
Magnani
,
I.
, and
Clavel
,
R.
, 1997, “
Design of Parallel Robots in Microrobotics
,”
Robotica
0263-5747,
15
, pp.
417
420
.
3.
Howell
,
L. L.
, 2001,
Compliant Mechanisms
,
Wiley
, New York.
4.
Lobontiu
,
N.
,
Paine
,
J.
,
Garcia
,
E.
, and
Goldfarb
,
M.
, 2001, “
Corner-Filleted Flexure Hinges
,”
ASME J. Mech. Des.
1050-0472,
123
(
3
), pp.
346
352
.
5.
Lobontiu
,
N.
, and
Paine
,
J.
, 2002, “
Design of Circular Cross-Section Corner-Filleted Flexure Hinges for Three-Dimensional Compliant Mechanisms
,”
ASME J. Mech. Des.
1050-0472,
124
(
3
), pp.
479
484
.
6.
Carricato
,
M.
,
Parenti-Castelli
,
V.
, and
Duffy
,
J.
, 2001, “
Inverse Static Analysis of a Planar System With Flexural Pivots
,”
ASME J. Mech. Des.
1050-0472,
123
(
1
), pp.
43
50
.
7.
Smith
,
S.
, 2000,
Flexures, Elements of Elastic Mechanisms
,
Taylor & Francis
, London, England.
8.
Saggere
,
L.
,
Kota
,
S.
, and
Crary
,
S. B.
, 1994, “
A New Design for Suspension of Linear Microactuators
,”
Proceedings, DSC-Vol 55-2, Dynamic Systems and Control, Vol. 2, 1994 International Mechanical Engineering Congress and Exposition
, Chicago, IL, Nov. 6–11, pp.
671
675
.
9.
Lobontiu
,
N.
, 2002,
Compliant Mechanisms: Design of Flexure Hinges
,
CRC Press
, Boca Raton, FL.
10.
Kyusojin
,
A.
, and
Sagawa
,
D.
, 1988, “
Development of Linear and Rotary Movement Mechanism by Using Flexible Strips
,”
Bull. Jpn. Soc. Precis. Eng.
0582-4206,
22
(
4
), pp.
309
314
.
11.
Bona
,
F.
, and
Zelenika
,
S.
, 1994, “
Precision Positioning Devices Based on Elastic Elements: Mathematical Modeling and Interferometric Characterization
,”
Seminar on Handling and Assembly of Microparts
, Vienna, Austria.
12.
Weinstein
,
W.
, 1965, “
Flexure-Pivot Bearings
,”
Mach. Des.
0024-9114,
37
(
13-D
), pp.
150
157
.
13.
Goldfarb
,
M.
, and
Speich
,
J.
, 1999, “
A Well-Behaved Revolute Flexure Joint for Compliant Mechanism Design
,”
ASME J. Mech. Des.
1050-0472,
121
(
3
), pp.
424
429
.
14.
Haringx
,
J. A.
, 1949, “
The Cross Spring Pivot as a Constructional Element
,”
Appl. Sci. Res., Sect. A
0365-7132,
A1
(
5–6
), pp.
313
332
.
15.
Norton
,
R.
, 2000,
Machine Design, An Integrated Approach
,
2nd ed.
,
Prentice Hall
, Upper Saddle River, NJ.
You do not currently have access to this content.