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Патент USA US2129372

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Sept. 6, A1938.
Filed Fe'b. l5, 1935
Patented Sept. 6, 1938
David E. Gamble, Chicago, Ill., assignor to Borg
Warner Corporation, Chicago, lll., a corpora
tion of Illinois
¿Application February 15, 1935, Serial No. 6,624v
' 9 claims.
(ci 19e-107)
This inventiondrelates to friction clutches for ment with the supports and fastened thereto by `
automotive vehicles and it may also be used inl the rivets I3. I prefer to employ a cylindrical
other friction clutches for‘which it is or may be _curvature for .the cushion members »I I, seey Fig. 6,
and to position the cushion members upon the
The primary object of this invention is to pro
disk, so that the axes of curvature are so arranged 5
vide a novel clutch plate with a wide distribution relative to the disc and the facings that the con
of points of support for the friction facings which tacting areas between the cushions, the face and
are adapted for cushioned engagement in the the disc increase radially relativeto the disc as
operation of the clutch.
the plate is' compressed during engagement of
Another object is to prevent movement of the the clutch. The tongues 9 are curved to dispose 10
separate cushion members of a cushioned clutch the base and free end of each tongue in engage- .
plate about the mountings therefor.
_ment` with the-facing I2 and the central portions
-A further object is to provide a cushioned clutc , of the tongues are spaced from the plane ofthe
plate having at least one friction facing thereonl disc. A friction facing Il Vis fastened to the cen
spaced from the disc wherein the spacing of the trai portions of the tongues by rivets I5 so that 15
facing is provided by means which also cushion the facing Il is in engagement with the inner
the facing in addition to separate cushion mem
and outer ends of the cushion members II and
bers provided for this purpose.
is spaced from the plane of the disc. The cushion
A stili further object is to provide a cushioned members are provided with lips I6 struck from
20 clutch plate having a friction facing spaced from the cushion members and bent from the convex ’20
the disc by means which also cushion the facing side thereof to engage the supports. iB_in openings
in addition to separate cushion members pro
I 1 therein provided. 'I'he lips I6 and openings
vided for this purpose wherein the plate is cush
I'I-cooperate with the rivets I 3 to prevent rotative
ioned in stages during engagement thereof in I movement of the cushion members about the- .
25 operation of the clutch.
' In the accompanying drawing illustrating the
My invention provides a highly emcient cushion
clutch plate wherein the facings are mountedv
Fig. 1 is a plan view of the clutch plate showing ~parallelto each other and to the plane of the
one facing partly broken away;
plate and remain so throughout engagement of
Fig. 2 is' a sectional view on the line 2
the clutch plate in operation of the clutch. The 30
Fig. 1:
_cushion members may be made of a higher grade
Fig. 3 is a sectionalvigw on the line 3-3 of of material than is required in the disc. The
Fig. 1;
cushion members are rigidlygheld in operative
Fig. 4`is a sectional view on'the line I-I of position between the facings and are positively
35 Fig. 1;
held against rotative movement about the mount- 35
Fig. 5 is a sectional view similar to Fig. 4 show
ing therefor. The tongues are flexible becauseSof y
ing another forni of the invention; and
their narrow cross-section at the base and pro
Fig. 6 is a perspective view of one of the sep
-vide anV efficient additional cushion to the cushion
arate cushion members shown in Fig». 1.
members -as well as a means for mounting the
Referring to the drawing, the clutch plate « spaced friction facings on the clutch plate. 'I'he 40 _
selected for illustration _comprises a disc 1 secured facing I2 is engaged with the support throughout
to a hub member l which is adapted to be one entire face of each support and with the
mounted on a driven shaft of an automotive base and free end of each tongue in the embodi
vehicle. The disc‘is slotted through its periphery ment shown in Figs. 1-4. The curvature of the
45 to form tongues 9 and supports I0 in alternating cushions II and the disposition- of the axis of 45
arrangement. Cushion members II, preferably curvature relative to the disc and to the facing>
made of a high 'grade'spring steel, are arranged I 4, is such that when the plate is uncompressed,
on the supports on one side of the disc and a . there are two approximately parallel lines of
friction facing I2 is arranged on the opposite contact between the facing and each cushion,
50 side of the disc and the cushion members and and one line of contact between Jtheidisc and~ 50
`facing I2 are fastened to the` disc by rivets I3. . each ofthe cushions. As the clutch plate is
'I'he cushion members are curved to normally compressed, however, these lines of contact
dispose the inner and outer ends thereof in broaden in directions radial of the disc hub to
_spaced relation to the supports and the central increase the area of contact and support. This
55 portions of the cushion members are in engage
simple arrangement provides for the maintenance 55_
of uniform yielding facing support circumferen
tially of the plate throughout the entire range of
clutch plate operation, a feature that is highly
desirable in the promotion of long life through
uniform spacing Wear.
ports and tongues arranged in alternating suc
cession at the periphery of the disc, cushion mem
bers mounted on the supports, the cushion mem
bers and tongues being curved to oiîset parts
thereof from the same side of the disc, friction
The provision of structurally independent cushf
facings arranged on opposite sidesof the disc,
ion members of a high-grade spring steel, permits
means fastening one facing and the >cushion mem
bers to the supports and on opposite sides thereof,
the manufacturer to predetermine the exact re
sistance to compression of the clutch plate as-_ and means fastening the other facing to the
10 sembly during manufacture without alteration or offset parts of the tongues to cushion the engage 10
change in the structure or thickness of the clutch ment thereof during operation of the clutch.
disc 1, and therefore, Without impairing the
4. A clutch plate Acomprising a disc, spaced sup
torque transmitting characteristics of the plate. ports and tongues arranged in alternating succes
The tongues 9 may be curved, Fig. 5, so that sion at the periphery of the disc, curved cushion
15 only the base of each tongue is in engagement members arranged on one side of the supports, 15
with the facing I2, and the free end of each the tongues being bent from the plane of the disc
tongue is bent back but not into the plane of the on the side thereof having the cushion members
disc and remains on the side thereof toward thereon, and friction `facings arranged on op
which each tongue is bent at its base. This con
posite sides of the disc and one- facing spaced
struction provides for a cushion which acts in therefrom by the tongues'and ‘cushioned by the 20
stages. The ñrst stage of cushioning in engage
tongues and cushion members in engagement of
ment of the clutch constitutes the partialstraight
the clutch plate during operation of the clutch.
ening of the curve in the cushion members Il
5. A clutch plate comprising' a disc, friction
and the curve in each tongue between the base facings arranged on opposite sides of the disc,
and rivet until the free end of each tongue en»
curved cushion members on the disc andbetween 25
gages the facing I2 at which time the second the facings, means fastening the vcushion mem
stage of cushioning commences and constitutes bers to the disc to dispose the central portion of
the further straightening of the cushion members the convex side in engagement with the disc, and
Il and the further straightening of each tongue - means on the cushion members engaging the
30 between the base and rivet plus the straightening disc to retain the cushion members in'position, 30
between the rivet and the free end of each tongue. said means including portions of the cushion
The second stage of cushioning continues until members extending outwardly therefrom in the
¿, i»
the cushion members H are completely straight
direction of the disc and engageable with the disc " "
ened and the tongues 9 nearly so.
at a point spaced away from said fastening`4V
The facing I4 is supported by the central por
tion of each tongue and by the inner and outer
6. A clutch plate comprising a disc havingLk
edges of the cushion members.
This provides a »
bers on the disc and between the facings, means
degree of efficiency.
fastening the cushion `members to the discl to
While Ihave shown and described the invention
opposite sides of the disc, curved cushion mem-»YQ i
dispose the central portion‘of the convex side in
in a particular type of clutch plate I do not mean
engagement with the disc, anda lip struck from `
thereby to restrict the invention to the embodi
ments illustrated nor to the type of clutch plate
shown for it can be employed in many different
embodiments and kinds of clutches and clutch
plates with satisfactory results; and therefore I
the convex side of each cushion member and
extending into an opening in the disc to engage
the disc for holding the cushion member against 45
movement about the fastening means;--
ì '
'7. A clutch plate comprising a disc', supports
reserve the right to use the invention in any form `
and tongues arranged in alternating succession at .
and for any purpose for which it is or may be
the periphery of the disc, curved cushion members
adapted within the scope of the following claims:
mounted on the supports, and friction facings on 50
I claim:
opposite sides of the disc, one facing being in
l. A clutch plate comprising a relatively thick
metal disc, spaced supports and tongues arranged
in alternating succession at the periphery of the
disc,> relatively thin metal cushion members
mounted on the supports, the cushion members
and tongues being‘curved to offset parts thereof
from the same side of thevldisc, and a friction
facing arranged on the cushion members and
tongues to cushion the engagementV thereof dur~
ing operation of the clutch.
' A
2. A clutch plate comprising a disc. spaced sup
ports and tongues arranged in alternating suc
cession at the `periphery 'of the disc, curved cush
65 ion members on one side of the supports vwith
the central portion of their convex sides in en
openings therein, friction facings arrangedcnI
Wide distribution of points of support for each of
the facings so that the clutch plate has a high
engagement with the supports and the other fac
ing in engagement with the ends of the curved
cushion members, ‘the tongues being curved to
offset the central portion on one side'of the plane 55
of the disc and in engagement with said other
facing and the free end thereof being curved back
toward the plane of the -disc but not thereinto _
to ‘provide a cushion which acts in stages during "
engagement offthel clutch plate during’operation 60
8. A clutch plate comprising a disc, friction
facings arranged one at'each' side of said disc, a
plurality of curved cushion members in annular
array about thel peripheral region of the disc,
-securing the cushion members to'said _disc
ga'gement with the supports, the tongues being with theirfree
endspextendingv toward and con
curved in a direction opposite to the curvature of tacting with' the adjacent facing.,fthe curvature
said cushion members and arranged with the of vsaid cushion„members being cylindrical and
central portions thereof spaced from the plane "
of the disc, anda friction facing arranged on the
ends of the cushion members >and central portion
of the tongues to cushion the engagement thereof
during operation of the clutch.
3. A clutch plate comprising a disc, spaced sup
`each generated about an axis that is so disposed
`that when the 'cushionsare compressed the con
l_tactìng area'. between the cushions and the ad
jacent facing surface increases in a radial direc
tion, and means forming a part of the cushion
members and engageable with the disc for re
3 .
straining the cushion members against rotation ion members having portions extending away
about the axis of their securing means.
9. A clutch plate comprising a relatively heavy
sheet metal disc, relatively rigid friction facings
from said disc in the direction of the adjacent
facing and adapted to contact the inner surface
of the facing, each of said cushion members being
arranged one on each side of said disc at the ` so formed that when compressed, as by move
peripheral portion thereof, and a plurality of ment of the adjacent facing relatively toward the
structurally independent and relatively light cushion. the area of contact between the cushion
cushion members arranged about said peripheral and facing will increase in a direction radially
portion of said disc. means iixing each of said = of the axis of the facing and disc.
' 10 cushion members securely to said disc, said cush
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