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Патент USA US2115895

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May 3, 193s.
K. WE'IHMANN
‘ 2,115,895
` POWER TRANSMITTING DEVICE
Filed- May 14,' 1954
3 Shee‘cs-Shee’cI 1
" ATTORNEYS.
May 3,> 1938.
K. wElHMA‘NN
2,115,895
POWER TRANSMITTING DEVICE
Filed May 14, 1'954
3 sheetsi-shçet '2
BY
A TTORNEYÖ.
K. wElHMANN
'
2,115,895
POWER TRANSMITTING DEVICE
Filed May 14, 1934 '
Ill/IAF
3 Sheets-Sheet 5
\\
INVENTOR.
/fdf-Z Médina/72?.
BY
A TTORNEYS.
Patented May 3, 1938
«2,115,895v i
UNITED STATES
PATENT oFF-ICE
2,115,895
POWER TnANsMrr'rlNG DEVICE
Karl Weihmann, Detroit, Mich., assignor to-j
Chrysler Corporation, Detroit, Mich., a corpo
ration of Delaware
Application May 14, 1934, Serial No. 725,571
(Cl. 103-1'15)
Fig. 1 is a sectional elevational view axially
This invention relates to power transmitting
9 Claims.
devices and refers more particularly to fluid cou _ through my improved coupling. .
plings, clutches, drivesand the like.
It is an object of my invention to provide an
5 improved fluid coupling capable of manufacture
at relatively low cost; to provide a coupling of
improvedperformance and efficiency; and to
provide improved and more efficient character
istics of the fluid flow within the coupling.
10
A further object of my invention is to provide
a fluid coupling of relatively light weight and low
manufacturing cost -without sacrificing the de
sired requisite strength and resistance to objec
tionable distortion.
Fig. 2 isv an end elevational view of the fluid
coupling illustrated in Fig. l, a portion of the
driving casing and runner being broken away to 5
illustrate the typical ñuid passage forming mem
bers of the impeller.
Y
'
Fig. 3 is a detail fragmentary sectional view
along the line3--3 of Fig. 2.
'
Fig. 4 is a view illustratingthe assembly of the 10
impeller and runner unit with the driving flyf
Wheel, the flywheel being shown in cross section
and the runner and impeller unitary assembly `
being illustrated in elevation.
Fig. 5 is a sectional elevational view illustrating 15
In carrying out the foregoing objects of my-`
invention, I have provided a vnovel coupling struc-> a modified form of my ñuid coupling.
Fig. 6 is a fragmentary sectional elevational
ture principally fabricated from sheet metal
View
of the fluid coupling illustrated in Fig. 5, the
stampings, thestamped parts being secured in
section being taken along the line 6-6 of Fig. 5.
the assembly against displacement by the cir
Fig. 7 is a view corresponding to Fig. 6'but 20
culating fluid medium. A relatively small number ~
15
of metal stampin'gs are vemployed in mycon
struction to form the vanes and the vane cover
structures, these stampings being fashionedand
assembled in a novel manner- for attaining the
25 objects set forth above.
A further object of my invention is to provide
~ improved means for -assembling the component
parts of the fluid coupling; also improved means
for assembling the fluid coupling with the driv
30 ing means therefor.
-
-A still further object of my invention is to pro
vide a novel ñuid coupling construction~ wherein
the manufacture and assembly of the structural
parts thereof is greatly facilitated.
35
. Another object of my invention resides in the
provision of a fluid coupling having an impeller
structure and a runner structure adapted- for
assembly as a unitary construction removably
secured as a unit to the flywheel or other driving
' 40 means.
In connection with this‘phase of my in
vention, I have also kprovided in the aforesaid
illustrating a further lmodified form of one of the
fluid coupling rotors.
Fig. 8 is a view corresponding to Fig. 6 and --il
. lustrating a further modified form of my ñuid
coupling _ rotor.
.
Fig. 9 is a sectional elevational view generally
similar to Fig. 1 but illustrating a further modi
fied embodiment of my invention.
Fig. 10 is a sectional elevational view of the
impeller illustrated in the Fig. 9 embodiment, the 30
-section being taken along the line Ill-_I0 of
Flg.v11 is a fragmentary sectional elevational
view of the fluid coupling- illustrated in Fig. 9
but showing a modified form of Welding for the 35
structural >parts thereof.
-
`
In the drawings and referring particularly to
Figs. 1 to 4, reference character` A represents the
impeller structure of thefluid coupling and B
designates the runner structure, the coupling be- 40
ing shown for illustrative purposes transmitting
unitary assembly, a driven shaft on which the _' the drive from an angine crankshaft I0 and fly
wheel II carried thereby to a ‘driven shaft I2
tion and also a sealing means between the shaft which may be _connectedto the driving wheels
' (not shown) of a motor vehicle- in the well-known 45 ._
45 and the casing of the runner and impeller struc- ‘
manner. My coupling may, of course, be em
tures. In the more limited aspects of my inven
tion, I have also provided a starter ring gear ployed to provide a. driving connection between
runner structure is mounted for driving connec
adapted for connection with the driving flywheel
preferably by the same means which secures the
50 aforesaid unitary assembly to the flywheel.
Further objects and advantages of my inven
tion will be apparent from the following detailed
illustrative embodiments of the principles of my
invention, reference being had to the accompany
55 ing drawings in which:
the various parts of different machines or de«
vices and is not limited in its useful application`
to motor vehicle drives.
50
The impeller or rotor A has a stamped sheet
metal annular vane carrying outer cover plate l
_I3 dished as illustrated in Fig. 1 and extending
around the axis of the fluid coupling assemblyl
provided by the aligned axes of- crankshafty lll 55
2
2,115,895
and driven shaft I2. As will be more apparent
presently, the outer cover` plate >I3 cooperates with
an annular housing member I4 to house the im
peller and runner structures together with the
fluid medium circulated therein, the outer cover
plate I3 forming the forwardcasìng of the cou
pling andthe casing member I4 providing the
rear casing.
The outer cover plate I3 is provided with an
10 outwardly bent peripheral flange I5 to which the
outer annular carrier ring or stiffening ring ~I6
is secured preferably by welding as indicated atI‘I. The ring IB also has 'contact with the outer
face of the cover plate I3 adjacent the flange I5
15 but the welding .is preferably limited to those
-portions of the ring I6 which engage the flange I5
to avoid any tendency of distorting the outer end
portions of the cover plate I3. The flangel I5 and
ring I6 are provided with a circumferentiallyex
tending series of holes therethrough, the holes
in the flange and ring being aligned, alternate
holes in the circumferentialseries being adapted
to respectively receive the fastening means here
in illustrated as the bolts I8 and I9 respectively.
25
'I'he flywheel II is provided with an outer
_circumferentially extending shoulder 2II for re
ceiving the ring gear 2| which is provided with
a circumferentially extending series of openings
each of which is adapted on assembly, as will be
30 presently more apparent, to receive the afore
35
40
'
45
tablishinga drive for an auxiliary mechanism '
(not shown) it being apparent that such drive
takes place from crankshaft I0 through the fly-`
wheel || and casing member I4 independently of
the rotation of driven shaft I2.
The outer cover plate I3 in my Fig. 1 embodi
ment has an integral central plate 38 return bent »
at the engagement with the cover plate I3 for
strengthening purposes, the plate 38 cooperating
with the cover plate I3 to provide the forward 10
casing or housing for the fluid medium in the cou
pling. The plate 38` preferably extends closely
adjacent the forward end of hub 30 and the
splined forward end 3| of the driven shaft- I2.
Before describing the details of the fluid pas 15
sage forming means in the impeller A and runner
B, I-will describe that feature of my invention
which relates to the assembly of the impeller
and runn'er preferably together with the rear
casing I4 as a unitary construction capable of 20
assembly and disassembly Ywith respect to the
flywheel II.A This unitary assembly or subas
sembly preferably also includes the driven shaft
I2 and auxiliary .driving sleeve ~36 where -this
sleeve is` desired.
Fig. 4 best illustrates the as
25
sembly unit, this figure showing the parts of the
subassembly connected together by the aforesaid
bolts I9. In Fig. 4 the unitary assembly is shown
ready for connection to the flywheel II and ring
gear 2|, it being readily apparent that the alter 30
nating bolts I8 are adapted to engage the aligned
openings of the flywheel and ring gear to securely
said bolts I 8, the latter having threads 22 for
engagement with the openings in ring 2I. It will
be apparent that the starter ring gear 2i is, connect the subassembly as anunit with the ñy
thereby separatelyformed from the flywheel I I, ” wheel II. At the time of thisï connection it will
i
such construction permitting the flywheel to be valso be apparent that the starter gear 2| will be 35
formed of a stamping or a casting from relatively secured in theassembly. By reason of my con
low cost material lending itself readily to the struction it is possible to completelyassemble the
stamping or casting operation as the case may- impeller and runner together with the associatedl
be, the starter ring 2| being formed of a harder, parts of the fluid coupling and since the sub
higher grade steel. The flywheel II has an out
assembly also preferably includes the driven shaft 40
wardly extendingannular flange 23 having face
I2 and the usual fluid sealing means for prevent
contact with the starter gear ring 2| forwardly ing escape of the fluid medium from the fluid
of the flange and being engaged by the aforesaid ' coupling, the fluid coupling may be filled or par
ring I 6 rearwardly of the flywheel flange. The tially filled with the fluid medium prior to as
flywheel I'I is preferably formed separately from sembly with the driving means or ,flywheel II. 45
the engine crankshaft I0 and may be connected Likewise the subassembly may be removed for
thereto by suitable fasteners indicated at 24.>
inspection or repair, the parts of the fluid couThe rear casing member I4 has an outer an
nular flange 25 engageable with the flange I5,
50 the flange 25 being provided with a circumfer-‘
pling being removably4 held together as’a unit
by the bolts I9 when the bolts I8 are disconnected
from the flywheel. The fluid medium may be oil, 50
water. or other suitable fluid as may be de
sired, and the fluid medium may be introduced
entially extending series of spaced holes or
openings adapted to align with the holes of the
flange I5 and ring I6 whereby alternate holes'are to the working chambers ofthe coupling through
engaged'by the respective bolts I8 and I9.
one or more openings 39 in the casing member I4
The runner rotor B is provided with the l asbest seen in Fig. 3, these openings beingthen
55
stamped sheet metal -annular outer cover plate>26_ closed .by‘ screw plugs I4I'I.
'
dished oppositely to the cover plate I3. 'I'his
The impeller A is provided with .the stamped.
cover plate 26 extends inwardly to provide the sheet metal inner cover plate 4I spaced Within
annular flange 21 connected by fasteners such lthe outer cover plate I3 and correspondingly
60 as rivets 28' to and 'between the inner carrier dished, this inner cover plate extending ring-like 60
ring 29 and the hub 3U splined on the forward about the axis of shaft I2 and being substan
end of the driven shaft I2 as indicated- at 3|. tially semi-circular in cross section. The runner
The forwardly opening end of the hub 30 ad
B is also provided with a similar inner cover plate
jacent the forward end of shaft I2 is closed by a 42 spaced within the outer cover plate 26, these
inner cover plates ,4I and 42 together providing
65 closure disc 32 to prevent the escape of the fluid
medium rearwardly of the driven shaft I2. .'I‘he a vortex chamber 43 for the fluid which circulates
inner carrier ring 28 is secured to the flange 21, between the impeller and runner around the
if desired, in addition to the rivets 28 by welding vortex -chamber as will be presently more appar
as indicated at 33.
70
The driving casing member -I4 is centered on
the hub 38 -and driven shaft I 2 by one or more ball
bearing assemblies, one of which is indicated at
34 intermediate the hub 30 and casing I4 and,
if desired, the casing' may be connected by fas
teners 35 to a sleeve ,36 carrying a gear 31 for es
ent.
.
-
,
The rotors A and B may have vane fluid pas
sage formlng structures of generally similar con
70
struction, the typical structure being best illus
trated in Figs. 1 and 2 in connection with the lm
peller A. Intermediate the inner and outer cover
members I3 and 4| respectively are located a seT 75
I
3
2,115,895
.le of circumferentially. spaced stamped ‘sheet- plate I3a generally similar to the aforesaid cover
metal members C which are substantially arcuate
in form as seen in Fig. 1 and which extend sub
stantially radially from the low pressure cham
ber or zone 44 to the high pressure chamber or
zone 45, these chambers being provided by cir
cumferential clearance spaces between the oppo
sitely facing portions of the impeller A and run
plate I3, the cover plate I38L having the central
integral stamped portion 38a in this instance lying
substantially in a plane transverse to the axis of
the driven shaft I2“ for further minimizing fric
tion losses ofthe fluid circulated in the fluid
coupling. The cover plate I3n has welded thereto
the outer carrier ring llia engaged by the flange
23a of the flywheel IIa, the starter ring gear 2Ia
ner B.
being associated with the flywheel as before. vIn 10
’
In
the
embodiment
of
my
invention
illustrated
`\
10
in Figs. 1, 2 and 3, the members C are preferably Fig. 5 I have illustrated one of» _the through bolts.
stamped flat so that their inner and outer periph
eral edges are respectively conformed to the in
ner and outer cover plates 4| and I3 for edge
15 contact therewith, these edges being secured to
the associated cover plates by welding. 4The weld
ing may be readily accomplished for each rotor in
suitable fixtures (not shown), it being apparent
that all of the vane forming members C for each
20 rotor may be welded' simultaneously either con
tinuously along th‘e contacting edges of the vanes
and cover plates or else at spaced intervals as
- indicated by the welds 46.
-
For convenience of reference and for compari
25 son with other embodiments of my invention
hereinafter more fully described, the radially ex
tending vane portions of the members C may be
designated by reference character 41. The cir
cumferential spacing of the vane forming mem
30 bers C provide circumferentially spaced; fluid
conducting passages D, these passages in the im
peller A and runner B being open at their inner
ends with the chamber 44 and at their outer ends
with the chamber 45.
After the impeller rA and runner B are formed
35
with their respectively associated inner and outer
cover plates and the vane forming members, the
rotors are assembled together with the parts as
sociated therewith to provide the aforesaid uni
40 tary assembly ready for attachment to the driv
ing flywheel II. When assembled with the fly
wheel, the impeller A will rotate with the flywheel
and driving shaft I0 to cause the fluid to circulate
_ under the action of centrifugal force from space
44.0utwardly through the impeller vane passages
for discharge at the space 45 where the fluid en
ters the runner vane passages for discharge at
the space 44. The runner is thus driven from the
impeller and the drive transmitted from the run
50 ner to the driven shaft I2, the slip between the
rotors rapidly diminishing as the speed of the im
peller increases according to the Well-known
properties of fluid couplings. It will be observed
that the fluid space between the casing member
55 I4 and the forward enclosure defined by the
outer cover plate I3 and the central plate 38v is
'45
I8a adapted to connect the corresponding sub
assembly with the flywheel I IB. The outer casing
member I4a is connected as before with the aux
iliary driving sleeve 36.
_
'
-
The impeller A' and runner- B’ may be pro
15
vided with the aforesaid innercover plates 4I
and 42 respectively, the runner B’ having- .the
outer cover plate 26B illustrated in Fig. ,5 as hav- t
ing the welded` inner carrier ring 29a secured 20
by fasteners 23a to the hub 3|)a for driving con
nection with the driven shaft I2a as will be readi
ly understood.
-
,
In Fig. 6 the typical impeller A' is illustrated,
the fluid conducting passagesD being formed by 25
the same welded vane forming members C as
were illustrated and described in connection with.
the Fig. 1 embodiment of my invention.
In Fig. '7 I> have illustrated a modified form of
vane forming members C' for the typical rotor A2, 30
the rotor being otherwise ysimilar in construction
with the rotor illustrated inl Fig. l as indicated
by the use of similar reference numerals. g
The members LC? have radially extending ar
cuate vane portions 4ln weldedalong their outer
arcuate ends to the outer cover plate I3 of the
impeller A2, each vane portion 4'Ia being formed
with an inner circumferentially bent web or flange
48 shaped to conform to and engage the inner
surface of the inner cover plate 4I and being
welded thereto as indicated at 46a.
These webs 48
serve to further strengthen the vane forming
members C' and also the structural assembly of
-the impeller rotor A2.
Referring now to the further embodiment of 45
my invention illustrated in Fig. 8, it will be noted
that the typical impeller rotor A3 illustrated there
in generally corresponds to the rotor A2 illus
trated in Fig. 7 with the exception that the-vane
forming members C2 are provided with outer ar 50
cuate webs or flanges 49 `welded at 50'a1ong the
engaged inner surfaces of the outer cover plate
I3. The structure otherwise- is similar to that
illustrated in Fig. '7, the members C2 having ra- `
dially extending arcuate vane portions 41h. It 55
will thus be apparent that the members C2 each
substantially free from projections, screws, bolts, provide an arcuate vane forming member chan
etc., which produce noises and friction losses as nel-shaped iny cross section for. added strength.
the fluid is rapidly circulated within the cou-l rigidity of the structure, and to further facilitate
60
pling. Furthermore, it will be noted that the welding incertain instances.
v
bounding faces of the fluid passages D will like
wise provide for smooth flow of the fluid with
resulting relatively high efficiency of power trans
mission, such smooth flow being'of particular
benefit in providing a high degree of slip between
the rotors at lowwspeed where slippage is desir
able.
^
Referring now to the slightly modified con
struction of my invention illustrated in Figs. 5
70 and 6, it will be noted that I have designated
_ several of the parts therein by the same reference
characters referred to hereinbefore inasmuch as
such parts are of generally similar construction
and of similar purpose and function. In Fig. 5
75 .the impeller A’ is provided with the outer cover
Referring now to the further modified embodi
ment of my invention illustrated in Figs. 9 to l1,
a portion of the engine E is illustrated therein
associated with the rearwardly extending crank 65
shaft I0 as aforesaid, the crankshaft being shown
in association with parts identical with the fluid
coupling illustrated in Figs. 5 and 6, namely the
starter ring ZIB, flywheel flange 23a, carrier ring
Ilia, casing member I4a and parts associated there 70
with, and the through bolts I8a. ` At the lower half
of the viewseen in Fig. 9, I have illustrated one
of the subassembly bolts I9’i corresponding in
function to the bolt I9 o_f Fig. 1 aforesaid for per
mitting the building up of the fluid coupling 75
4
proper for attachment as a unit to the flywheel
il“,
Y
`
`
bodime'nts of my invention, this' sealing means
cooperating between the driving sleeve 36 and the
hub 3i)a to prevent escape of the fluid medium
from the working space of the fluid coupling.
In Fig. Y9 the central plate 38h is provided with
10 an 'outer peripheral flange 52 for attachment to
the outer cover plate |31’ by welding as indicated
at 53. The driving casing member I4a is cen
tered and supported on the hub 3i)B by the bearin
assembly 34E.
`
cover structure, a plurality of fluid passage form
ing members withinsaid cover structure and se
'
In Fig. 9 I have illustrated a sealing means 5I
which may be used throughout the several, em
15
l
2,115,395
_
"
In Figs. 9 to 11 the impeller A4 and the associ
ated runner B4 may be similarly constructed with
respect to their fluid passage forming means, Fig.
cured thereto, said members having circumferen
tially spaced substantially radially extending vane-
portions, said members having cìrcumferentially
extending por'tionsf forming a second annular
cover structure. '
3. In‘aviluid coupling rotor, an annular dishedv
cover structure, a plurality of fluid passage form
ing members within said cover structure and se-~ .10"
cured thereto, said members having circumfer
entially spaced substantially radially extending
vane portions, said members having circumfer
- entially extending dished' portions, the- dished
portions of adjacent members being relatively
telescoped.
y
4. In a fluid coupling rotor, an annular dished
10 best illustrating the typical construction for4 cover structure, a plurality of fluid passage form
the impeller rotor'A‘f. The vane 'forming mem
ing members within said cover structure and se
20 bers C3 are provided _with arcuate substantially
cured thereto, said members having circumfer
20
>radially extending vane portions 41" suitably con
entially spaced substantially radiallyextending
nected as by welding either intermittently around vane portions, said members having circumfer
one of the peripheral portions such as the outer n, entially extending vdished portions, the dished por
peripheral portions thereof to the inner surfaces tions of adjacent members being relatively tele
of the adiacent plate such as the outer cover plate scoped, said dished portions of said members 25
I3b as indicated at the Welds'llì in Figs. 9 and l0, forming a second annular cover structure co
or else continuously as indicated by the welds 46h axial with the first said cover structure.
in Fig. 11, the latter‘flgure being votherwise iden
5; yIn a fluid coupling rotor, an annular ydished y
tical with the showing in Fig. 9.
' cover structure, a plurality of fluid passage form
30
The members C3 are adapted _in the present ing members within said cover structure and se 30
illustration to form the inner cover structure to' ' cured thereto, said members having circumfer
~' provide the vortex chamber similar to the vortex entially spaced substantially radially extending
chamber 43 of Fig. 1. To this end the members vane portions,` said members having circumfer
, C3 have -their inner portions'angled to'provide cir
35
cumferentially extending dished portions 5l pro
vided with inwardly 'olfset terminal ends 55 fitting
within >thev dished portion of the next adjacent
v member telescopic-like as clearly indicated in Fig.
10.
In this manner I have provided passage
forming members C3 preferably of stamped sheet
metal, these members forming the vane portionsl
entially extending dished portions provided with
offset ends, the offset end, of each of said mem 35
bers fitting within the dished portion of the next
adjacent member.
6. In a fluid coupling rotor, an annular dished
cover structure, a plurality of fluid passage form
ing membersfwithin said cover structure, said 40
members having circumferentially spaced sub
. circumferentially bounding the fluid passages D4 stantially radially extending vane portions welded
vand also forming the inner cover ring as a con
at one end thereof substantially perpendicularly
tinub'us structure of interconnected or telescoped to said cover structure, said members having
component dished rportions of the members C3. their other ends angled to provide circumferen 45
On assembly of the rotor A4, the members C:i have ` tially extending dished portions forming a second
their telescoped inner cover ring portions welded annular coverì structure co-axial -wlth the ñrst
either intermittently as indicated at 46c' in Figs.
9 and 10 or continuously as indicated at 46d in
50 Fig. l1 by the well-known continuous flash method
of welding. The telescoping of the dished por
tions as indicated at 55 is preferred to facilitate
the welding bond and also to further strengthen
said
cover
structure.
y
,
'
'7. In a fluid coupling rotor, an- outer annular
dished cover structure, a plurality of fluid passage 50'
forming members within said outer cover struc- ,
ture, said members having arcuate substantially
radially extending and circumferentially spaced
the structure although, if desired, the welde'd parts vane portions secured at their outer ends to said
may be brought into' abutting relationship with
outer cover structure, said members having their
out the> overlapping or telescoping arrangement. -\inner ends angled to provide circumferentially
Various modifications and changes will be read
extending dished portions forming an inner cover
ily apparent from the teachings of my invention,
structure.. I
as set forthvin the appended claims, and it is not
my intention to limit my invention to the partic
ular details of construction and operation shown
and described herein for illustrative purposes.
WhatIclaimisr
'
'
_
y
'
_ 8. In a Ziluid coupling rotor, inner and> outer
annular dished cover structures connected by cir
cumferentially spaced fluid passage forming
vanes, said Avanes having circumferentially ex
tending portions forming one.~ of said cover struc
l. In a fluid coupling rotor, an annular` dished
cover structure, a plurality of fluid passage form
ing members within said cover structure vand se
tures.
9. In a fluid coupling rotor, innerand outer
annular dished cover structures connected by cir
cured thereto, said members having circumfer
entially spaced substantially radially extending
vanes, said vanes having circumferentially ex
vane portions, said members having circumferen
70 tially extending' portions overlapping each other.
.2. In a fluid coupling rotor,- an annular dished
cumferentially spaced fluid passage forming
tending portions successively overlapping each
other to'form oneof-said cover structures.
70
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