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Патент USA US2406875

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'sePF- 3, 1946'
'
Y '
|_. WALLERSTEIN, JR
FLEXIBLE
COUPLING
Filed Oct’. 24, 1944
- 2,406,875
' I
2 Sheets-Sheet 1
Sept 3, 1946. ,
'
L. WALLERSYTEIN, JR
2,406,875
FLEXIBLE COUPLING
Filed‘ Oct. 24, 1944
2 Sheets-Sheet 2
/8
.
‘
2,406,875
Patented Sept. 3, 1946
‘UNITED STATES PATENT OFFICE
FLEXIBLE COUPLING,
Leon Wallerstein, Jr., Erie, Pa., ,a'ssignor to Lord
Manufacturing Company, Eric,‘Pa., a corpora
tion of Pennsylvania
Application October 24, 1944, Serial No. 560.140
4 Claims.
7
-
(Cl. 64—11)
l
The invention relates to ?exible couplings be
and angularly disposed with relation to, and
tween the adjacent ends of a pair of driving
around the drive axis, and are provided with ?at
and driven shafts, and has particularly to do with
couplings of this type that include bodies of re
silient material, such as rubber, adapted to trans
mit driving torque and to isolate or materially
reduce the transmission of torque and other vi
faces‘ IiZa‘and. [3a, respectively, that lie in a plane
perpendicular to the drive axis. These arms ex
tend radially from a hub I4 that is keyed to the
driven shaft, and are disposed at right angles to
the arms 2 and 3 of the driving shaft. While one
brations.
ofthe shafts has been designated as a driving
'7
and the other as a driven shaft, either of them
This invention provides a ?exible coupling of
the type explained in which torque is transmit 10 may be the driving and the other thegdriven
shaft, and either may be driven in either direc
ted through shear on bodies of resilient material
arranged to act in series, and in which the bodies
At the adjacent ends ‘of, the shafts there is a
of resilient material yield in shear to accom
floating coupler which is provided with flat faces
modate-parallel and in bending to accommodate
tion.
angular misalignments of the , shafts.
‘
l
'
It also 15 that are parallel to the faces 2a and 3a of arms
provides a ?exible coupling of the type and char
acter stated which includes a coupler at the ad
jacent ends of the shaft by which torque is trans
mitted in series through two pairs of diametri
cally disposed bodies of resilient material posi
tioned at right angles to each other, one pair be
ing between the driving shaft and the coupler
and the other between the coupler and driven
shaft.
2 and 3 and to the faces Hit and 13a of arms l2
and i3. As shown, the coupler preferably takes
the form of a ring l5 having a continuous fiat
face [5a which includes the several faces just
20 described, although the coupler may take other
forms.
‘
r
_
Between the pairs of opposed cooperating faces
of the driving anddriven shafts and the coupler
there are bodies of rubber which transmit torque
The invention is illustrated in the accompany 25 in shear, there being two such bodies l6 and I1
between arms 2 and 3 between the driving shaft
ing drawings, of which Fig. l is a face view of a
coupling on the plane generally indicated by the
and the coupler, and two such bodies l8 and l9 7
between the arms [2 and I3 of the driven shaft
line I—I, Fig. 2; Fig. 2 a sectional view taken on
and the coupler, the bodies of rubber l6 and H
the line 11-11, Fig. 1; Fig. 3 a sectional view
taken on the line III-—III, Fig. 1; Fig. 4 a view 30 lying in a general plane that is at right angles
to that in which the bodies l8 and [9 lie. While
similar to Fig. 2 showing the action of resilient
these bodies of rubber may be variously connect
torque-transmitting bodies when there’is paral
ed to the opposed faces of the arms and coupler,
lel misalignment of a pair of coupled shafts; Fig.
they are shown as being bonded to them.
5 a view similar to Fig. 2 showing the action of
When the axes of the driving and driven shafts
the resilient torque-transmitting bodies when
are in alignment and torque is applied to driv
there is angular misalignment of the coupled
ing shaft I, it is transmitted through cup 5, arms
shafts; and Fig. 6 a view corresponding to Fig. 5
2 and 3, to rubber bodies [6 and I1 which trans
showing the action of the resilient torque-trans
mit the torque entirely in shear stress to cou
mitting bodies when the shafts have been rotated
through an arc of 90° from the position shown 40 pler [5. By the coupler the torque is transmit
ted to rubber bodies 18 and i9 which sustain it
in Fig. 5.
entirely in shear stress and transmit it to arms
Having reference ?rst to Figs. 1-3, a driving
l2 and I3 which are connected to driven shaft l I
shaft I is provided with two torque-applying
through bushing 14. Thus, torque is transmit
arms 2 and 3 which are preferably in the form
ted entirely by shear stress from the driving to
the driven shaft through two pairs of rubber
bodies which act in series through the intermedi
ate ?oating coupler l5.
driving shaft. Arms 2 and 3, being on opposite
In Fig. 4 the action of the coupler is shown
sides of the drive axis are disposed diametrically
with relation to it, as well as angularly around it. 50 when there is parallel misalignment of the driv
ing and driven shafts, such misalignment being
These arms have ?at faces 2a and 3a, respec
indicated by the offset between the axis 20 of
tively, which lie in a plane that is perpendicular
driving shaft l and the axis 2| of driven shaft
to the drive axis.
l I. As shown, the bodies of rubber accommodate
A driven shaft l l is also provided witha pair of
the parallel misalignment principally by shear,
plate-like arms I 2 and 13 which are diametrically
of plate-like projections extending inwardly from
a ring 4 to which there is attached a cup 5 that
is connected to a hub 6 which is keyed to the
2,406,875
3
and the torque is also transmitted by shear on
the bodies. Figs. 5 and 6 similarly illustrate the
action of the bodies of rubber when there is angu
lar misalignment of the axes 20 and 2| of the
driving and driven shafts, Fig. 6 showing the
coupler when the drive is turned through an an
gle of 90° from that shown in Fig. 5. As shown,
when there is angular misalignment the rubber
4
faces substantially parallel to those of said arms
and positioned opposite thereto to cooperate
therewith in torque-transmitting pairs, and a
body of resilient material such as rubber con~
nected to the opposed faces of each of said pairs
formed to transmit torque in shear from the driv
ing shaft through the coupler to the driven shaft
in series and yieldingly to accommodate misalign
bodies accommodate the misalignment principal
ment of said shafts.
ly by bending, while the torque is transmitted in 10
3. A ?exible coupling, comprising a driving
shear. Because in the aligned and misaligned
shaft provided with angularly spaced radially-dis
positions of the shaft the bodies of rubber act‘in
posed arms, a driven shaft provided with angu
shear to transmit torque, a comparatively high
larly spacedradially-disposed arms positioned be
degree of ?exibility is secured which provides ef
tween those of the driving shaft, each of said
fective isolation for torsional vibrations, and when
arms being provided with a flat face lying in a
there is misalignment of the shafts the loads that
plane substantially perpendicular to the drive
they transmit to their bearings are kept at a
axis, a ?oating coupler comprising a ?at member
minimum.
having, a face substantially parallel to said faces
What I claim as new is:
of said arms and positioned opposite thereto, and
1. A ?exible coupling, comprising a driving
a body of resilient material such as rubber con
shaft provided with angularly spaced radially,
nected to said driving and driven shaft faces and
disposed arms, a driven shaft provided with an
tosaid coupler formed to transmit torque in shear
gularly spaced radially-disposed arms positioned
from the driving shaft through the coupler to the
between those of the driving shaft,'each of said
driven shaft and yieldingly to accommodate mis
arms being provided with a ?at face lying in a 25 alignment of said shafts.
plane substantially perpendicular to the drive
4. A ?exible coupling, comprising a driving
axis, a coupler provided with ?at faces substan
shaft provided with a pair of diametrically-dis
tially parallel to those of said arms and positioned
posed arms, a driven shaft provided with a pair
opposite thereto to cooperate therewith in torque
of diametrically-disposed arms positioned be_
transmitting pairs, and a body of resilient mate 30 tween and at right angles to those of the driving
rial such as'rubber connected to the opposed faces
shaft, each of said arms being provided with a
of each of said pairs formed to transmit torque
?at face lying in a plane substantially perpendic
in shear from the driving shaft through the cou
ular to the drive axis, a ?oating coupler compris
pler to the driven shaft and yieldingly to accom
ing a flat member having a face substantially
35 parallel to said faces of said arms and positioned
modate misalignment of said shafts.
2». A flexible coupling, comprising a driving
opposite thereto, and a body of resilient material
shaft provided with a pair of diametrically-dis
such as rubber connected to said driving and
posed arms, a driven shaft provided with a pair
driven shaft faces and to said coupler formed to
of diametrically-disposed arms positioned be
transmit torque in shear from the driving shaft
tween and at right angles to those of the driving 40 through the coupler to the driven shaft and yield
shaft, each of said arms being provided with a
ingly to accommodate misalignment of said
?at face lying in a plane substantially perpendic
shafts.
ular to the drive axis, a coupler-provided with ?at
LEON WALLERSTEIN, JR.
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