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Патент USA US2106541

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Jan. 25, 1938.
J. TJAARDA
_ 2,106,541
ENGINE MOUNTING
Filed April 9, 1934
2 Sheets-Sheet l
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arcsnoINVENTOR.
ATTORNEYS.
Jan. 25, 1938.
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J;- TJAARDA
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ENGINE
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2,106,541
MOUNTING
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Filed April 9, 19:54
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2 sheets-sheet 2'_
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IN VEN TOR.
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ATTORNEYS. '
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2,106,541
Patented Jan. 25, 19.38.
PATENT OFFICE
< UNITED STATES
2,106,541 `
ENGINE MOUNTING
John Tjaarda,_ Birmingham, Mich., assignor
to Briggs Manufacturing Company, Detroit,
Mich., a corporation of Michigan
Application April 9, 1934, Serial No. 719,656
A 11 claims.
(01.180---541-
ticularly adapted for mounting a power unit in
'I'he present invention relates to an engine.
mounting and vehicle frame construction adapt
cluding f an engine, transmission, clutch and
differential in the rear of an aerodynamic stream
ed particularly but not exclusively for use in
lined vehicle body such as the “teardrop” type,
.motor vehicle constructions wherein the engine
5 is mounted adjacent the driving wheels of such
vehicle.
while conserving the maximum carrying capacity
in the interior of the body.
An object of the present invention is to provide
`
It is a further object to provide an engine '
the driving wheels, the center of gravity thereof
being preferably located forwardly’of the rear
mounting and vehicle frame construction in
which vibrations from >the engine, road shocks,
and the like, are absorbed in vibration absorbing
media such as live rubber, springs, or the like,
and are not substantially transmitted to the
driving axle shafts.
vehicle body.
an engine mounting and vehicle frame construc
tion particularly adapted for iiexibly mounting
an engine in the rear of a motor vehicle adjacent
'
'
.
y
`
Other objects of this invention will appear in
A lfurther object is to provide an >engine
mounting and vehicle frame construction in the following description and appended claims,
which the rear of the body and frame. is sup-` reference being had to the accompanying draw- f
ported from the engine which in turn is supported ‘ ings forming a part of this specification wherein
on the rear driving wheels by spring means pref
like referencefcharacters designate correspond
_'
_
¿
erably effective to permit independent'I movement _ ing parts in the several views.
20. of the wheels while 'reducing to a minimum the ' Fig. 1 is a fragmentary top planview showing 0
unsprung weight of the vehicle.
I the rear of a vehicle body frame in which a power
,
A further object is to provide an engine mount
ing and vehicle frame construction in which the
engine, transmission, diiferential and clutch are
25 combined as a readily installed or removable
power unit which yieldingly supports a portion
of the body and frame of the vehicle and in
which the power unit is floatingly supported in
improved manner through yieldable connections
bythe driving wheels of the vehicle.
.
Another object is to provide an engine mount
ing and vehicle frame construction in which the
weight of the power unit and body is so `distributed as to eiîect an increased vtractive etil
- unit is mounted in
-
invention.
accordance with the present
`
Fig. 2 is a fragmentary elevation partially in
section, taken through line. 2-2 of-Fig. 1 in the
direction of the arrows.
_
'
i
,
Fig. 3 is a sectional view taken on thejlin'e 3--'-3
of Fig. 1 in the directionl of the arrows:
Fig. 4 is a rear elevation showing the power
Aunit mounted on the driving wheels ofthe ve-hicle.
.
Fig. 5 is a fragmentary section of thefront
engine mounting taken on line 5_5 of Fig. 1 in
the direction of the arrows.
35 ciency of the driving wheels.
Fig. 6 is a. fragmentary sectional view taken
A further object of the invention is to providev lon the une s-s of Fig. 1 in the direction of the .
an improved structure wherein the power unit
or assembly, including engine,` transmission,
differential and clutch, is a separate unit spring
40 supported directly on the drivingwheels inde
pendently _of the vehicle frame and which unit «
in turn forms a carrier for the frame and body.
As a consequence, since the chassis> frame does
not, as in conventional practice,y support the>
45
power mechanism, its structure may be’ ma,
terially reduced in weight and-merely requires
suñicient strength to sustain the body and pas
senger loads.'v
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.
i
It is a further object to provide an improved
50 engine mounting and vehicle frame construction
in which the driving wheels are independently
mounted for free vertical movement relative to
each other.
y
It is a further object to provide an engine
55 mounting and vehicle frame construction par
Fig. 7 is a sectional view taken onlthe line Y.
‘l--T of Fig. 6_ in the direction of the arrows.
Before explaining inv detail the present inven- `
tion it is to be understood that the invention is
not limited in its applicationto the details of.
construction and arrangement of parts illus-k
trated in the accompanying drawings, since the .y
invention is capable of other embodiments and j 45
of being practiced or carried out in various ways.
Also it is to be understood that the phraseology
or terminology employed herein is >for the pur
pose of description and not of limitation,'and it j
is not intended to limit the invention claimedy
herein beyond the requirements of the prior art.
‘ Referring to the drawings and particularly to
Fig. 1, I0 designates a tubular central frame mem
ber extending longitudinally of the vehicle Ibody „
and _forming a part of the body carcass. The
2,106,541
v 2
frame member Ill has forks I0a and IIlb extend
between the face of the end of the lbracketf24 and
ing outwardly from therear portion thereof to ‘ the face of the closing plate I9.
provide a “Wishbone” type of frame in which suffi- _
The forward end of the power unit 20 is sup
cient clearance is provided between the forks Illa ported on the cross brace 32 and is held in a vibra
and IObfto accommodate the forward end of a tion absorbing cushioned mounting shown in de
power unit 20. - As shown in Fig. 3, the tubular tail in Fig. 5. As there shown, the brace 32 is a
frame member I0 is formed of two semi-circular channel member generally U-shaped in cross sec
tubular members II and I2 having depending
flanges I3and I4 and inwardly depending top
flanges orllugs I5 and I6. A central reinforcing
member or plate |1 extends lengthwise of the
member I0 and is secured by welding or similar
.means to the lugs I5 and I6 along its top longi
tudinal edge and is secured between the iianges
15 I3 and I4 along its lower longitudinal edge as by
means of rivets I8. The central member I1 is
provided with a plurality .of flangedppenings I1a
for the purpose of eliminating weight from the
member without sacrificing structural strength
-20 thereof. This construction is such that the mem
tion and provided with the ñanges 33 at its ends
which are 4secured as by riveting tothe plates I9
secured to the channel members II and |2 form
ing the forks Illa and Illb respectively.
In order to provide a brace which is light in
weight without sacrificing its strength, flanged
openings 35 are provided in the longitudinal sides
thereof. The top longitudinal edges of the chan
nel member are turned substantially at right
angles to the sides thereof to form the flanges 36.
A top reenforcing member 31 and a supporting
member 38 are secured by rivets or the like 39
to the flanges 36. -»Secured to the reenforcing 20'
bers VII and I2 and the member I1 form the main
member 31 and the supporting member 38 is a
unitary tubular frame member l0. y’The forks Illa
bracket 40 havinga downwardly extending flange
and Illb are formed from the members II and
I2 respectively, the open side faces of which are
4I whichisv secured to the reenforcing member 31,
the supporting 'member 38, and the ñange 36 by
25 closed by longitudinal plates I9 secured thereto
means of bolts'or similar fastening means 42.
in the manner shown in section in Fig. 7. A
cross brace 32 is secured to the plates I9 and
Extending laterally and at substantially right
the forks Illa and I0b and acts as a brace for
the framework while supporting the forward end
of the power unit 20.
‘
At the rear end of the, forks Illa and Iûb a
angles to theflange 4I on the bracket 44I) is a
flange 43 which is secured to the parts 31 and 38
by means of bolts. or similar fastening means 44,
which may extend through the supporting mem 30.
ber and reenforcing member and have a screw
frame supporting bracket 24 is provided >such~ as
threaded connection with’a ñller block 45 lo--
shown in Fig. 6. The bracket 24 acts as a suspen
cated inside the channel of member 38.
'_I'he >supporting bracket 40 at its upper end is
sion arch and is connected with a plate 22
35 adapted to rest upon the top of the casing 2|
vforming a part of the power u'nit designated
generally as 26. The power unit consists of an
engine, clutch, transmission, and differential, all
mounted on or in the unitary casing 2|.
The member 22 is formed with a substantially
40
enclosed channel which is generally U-shaped in
cross section and provided with upwardly extend
provided 'with
annular sleeve
46~has a body
fitted between
an annular hub 40a in which an
46 is carried. _ The annular sleeve
of rubberl 41 bonded thereon and
a face of the annular sleeve 46
35
and the inner corrugated face of the hub 40a.
The forward end of the power unit 20 is provided 40
with an extending supporting _hollow bearing
member 50. This member is tapered in its length _
ing substantially parallel side ñanges 23. A body
and is secured to the power unit 20 at 5I by weld
ing or rivets. The member 50 extends forwardly
from the power unit and within and in engage-A
ment with the tapered annular sleeve 46. An end
of the supporting bearing 5I) extends laterally be
yond the end of lthe annular sleeve 46 and is
groove in the rubber 21 and is maintained therein _ provided with a screw-threaded portion 52 on
which a nut 53 is placed. By drawing up the -nut 50
50 in such a manner that a space 3| is provided be
tween the edges of the channel 25 and upper edges 53 on the member 50 the latter will be drawn rear
of the flanges 23. This space 3| prevents a direct wardly sufllciently to clamp its wedge shaped ‘sur- .
metal-to-metal contact between the member 22 face in binding engagement with the inner wedge
-shaped surface of sleeve 46. An annular flangedv
and the bracket 24 when in the assembled posi
55 tion. The bracket 24 and the member 22 are opening 50a is provided in the end of the bear 56
maintained'in their relative positions‘as by means ing member 50 and permits the insertion of a
of bolts 28 which are embedded in the body of crank therethrough, when necessary, to connect
rubber _ 21 «and extend upwardly therefrom with; the shaft >54 formanually starting the '
n ._
through openings provided in the channel 25. A engine.
60 body _of rubber 29 is then placed inside. the ’~ ' In Fig. 4 is shown the assembly of the power 60
of rubber 21 is placed within theÍ channel and
45 maintained between the flanges 23. The sup
porting bracket 24 is formed with a channel 25
extending throughout its length.` _At the top por
tion ofthe bracket 24 the channel 25 rests in a
channel 25 and the bolts 28 extend through this unit _20 and the driving wheels 55 and 56. The
body of rubber 29. Nuts 30 arescrew threaded Í casing l2| of the power unit 20 is secured to the
' on the bolts 28 and through intervening washers mid-portion of a transverse leaf spring assembly
engaging the' rubber 29 compress the parts to- , 51I and is suspended therefrom. The lwheels 55
65 gether in cushioned relation.
and 56 are mounted on brake backing plates 56
Reenforcing flanges 26 extend along each and 59, which are maintained in upright position
longitudinal edge of the channel 25 and serve to through pivotal connections 60 with the ends of
impart rigidity and 4strength to the support. The
lower ends of the flanges 26 are secured to the
70 plates I9 by means of bolts, rivets, or the like 26a.
_ The detail of this fastening is shown in Fig'. '1.
As there shown- plates I|911 are welded within the
the transverse spring 51 and pivotal connections -
6| with the torque arms 62 and 63. The torque
arms 62 and 63 are pivotally secured to longitu 70
dinally spaced lugs 64 and 65 which depend from
the bottom of the casing 2|. The Wheels 55 and
frame formingmember II and are tapped to re- » 56 are driven from the differential gear mecha
- ceive the `screw-threaded ends of the bolts 26a.
nism through live axle shafts 66 (Fig. 2) which
25 An anti-squeak stripl | Ia is preferably interposed 'are universally >connected t0 the differential 75
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2,106,541
mechanism and wheels in customary manner to 'ing intermediate the ends of said casing, and
provide a “full floating” wheel mounting. The spring means supported directly by the driving
axle shafts extend through tubular axle housing wheels of the vehicle and directly connected with
sections 61 which are trunnioned at their ends said casing rearwardly of said suspension means.
to permit vertical movements of the wheels. The
2. In a motor vehicle having a central longi
tudinal frame bifurcated at its rear end, a 'powerl`
unit, a cushion support secured to the vehicle
frame adjacent the forward- end of the power
unit and yieldably connected to the latter, a vi
construction, therefore, is such that the wheels
55`and 56- are independently sprung and are free
to move relative to each other in a vertical di
rection. The torqueA arms 62 and 63, transverse
10 spring 51, and torque tubes 61 cooperate at all
times to maintain the wheels 55 and 56 in proper
transverse relation.
bration absorbing bearing plate carried by said 10
power unit in rear of said support, a suspension
member secured at its ends to the bifurcated
»
From the foregoing it will be seen that the
power mechanism comprising the engine, differ
15 ential mechanism, transmission mechanism and
clutch mechanism, preferably arranged in this
order, constitutes a single unit adapted to be
_ readily installed or removed as such.
ends of the vehicle frame and secured to and .
yieldingly supported by 'said bearing plate at a
point intermediate said ends, a transverse leafspring „having its ends supported directly by the
driving wheels of the vehicle andl having the
The frame
is bifurcated at its rear end to embrace or
20 straddle the forward end of the power unit and
is hung thereon. Preferably the power unit has
its center of gravity slightly- in advance of the`
bracket 24. The center of gravity of the power
unit 20 will thus be located in advance of the ~
25 spring 51 andthe transverse wheell axis. This
construction has the advantage of insuring proper
traction at all times and better stability. Inas
much as rapid- acceleration sets up forces tending
to lift the forward end of the power unit-and de
30 press the rear end whereby full traction would
_midsection thereof secured to said power unit
to suspend said unit therefrom, the weight of
the power unit and -connected portions of the 20
, vehicle frame being so distributed that `the center
of gravity thereof is located at a point forward
of said spring.
L
3. In a motor vehicle’having a frame and
rear driving wheels, a power unit, a cushion 25
support secured to the frame adjacent the for
ward end of the power unit and comprising a
bracket providing'an annular ring having its
axis on a line extending substantially axially of
the power unit, a' body of compressible rubber, 30
ordinarily be lost, the present» arrangement of ~ within >said ring, a forwardly projecting bear
the engine is desirable in order to counteract these
forces.
.
`
>
ing member secured to said power unit and ex
,ftending into and engaging said body of rubber,
a vibration absorbing bearing plate carried by
y
It is important to note that the forward con
nection at 40a between the power unit and frame
said power unit in rear of/ said support, a sus
lies on the longitudinal axis of the engine crank
pension member secured at »its ends to the ve
shaft, and that the arched supporting connec
hicle frame and secured to and vyieldingly sup
tion 22-24 has a curvature whose center lies,` ported by said bearing plate at a point inter
substantially at the axis of the crankshaft. Since ` mediate said ends, a transverse leaf spring hav
these connections between the power unit are ing its ends supported directly by the driving 40
made through rubber it will be seen that the> wheels and having the mid-section thereof se
oscillatory or vibratory movement of the power _cured to said power unit to suspend said unit
unit about the axis of the crankshaft will be y therefrom, the weight of the power unit and
readily absorbed and will not be transmitted in
connected portions of the vehicle frame being
45 any substantial extent to the yframe and body,
so distributed that the center of gravity thereof
is located at a point forward of the transverse
the torque reaction being largely taken up by
the spring 51. It will also be observed that the
center of gravity of the engine or power yunit mass '
is materially belowá the point of suspension of
50 the unit from the spring 51 which point is sub
stantially on a line normal to the crankshaft
~axis. By virtue of this construction, when the
car is travelling in a curvilinear path, the engine
mass, due to its pendulum effect, tends tobecome
55 displaced in the direction of the outside of the
curve. The eñ’ect of this is to exert forces
through the spring leavesl effective to‘produce
angular or banking movement of the wheels.
Due, therefore, to the arrangement and manner
60 of supporting the engine on the wheels, ‘cen-`
trifugal forces vset up when the car goes into a
curve are eifectually counterbalanced by aug
mented centripetal forces, thereby. giving the car
increased stability on cuî‘ves.
'
65
axis of the driving‘wheels.
K
4. In a motor vehicle having a frame and rear
driving wheels, a power unit extending between
said wheels and supported thereon, a yoke-like 50
suspension member having the ends -thereof se
cured to the frame and having its mid-section
arched to embrace said lpower unit and suspend
said frame from the power unit, and separate
means spaced from said suspension member for 55
mounting the frame on said power unit. '
5., A motor vehicle comprising a frame and
wheels, a" power unit including an engine having> a ,
horizontal crank shaft extending iongitudinally
of the vehicle, spring means connected to the 60
wheels and connected centrally to the power unitv
for suspending the power unit therefrom, and lon'
gitudinally spaced supporting connections be
tween the frame and engine, each connection
- being centered on the crank shaft axis, one thereof
1. A motor vehicle having a frame and a pro
pulsion unit adjacent the rear >end thereof, said
propulsion unit supporting the- rear portion -of’
said frame and comprising a-unitary casing con
70 taining an engine and transmission mechanism,
said casing having a forwardly extending bear
ing, a resilient engine mounting secured to the
vehicle frame adjacent the forward end of said
casing and adapted to receive said bearing, sus
pension means connecting the frame and cas
lying above said axis and the other substantially
on "said axis.
‘
6. A mounting for a rear engine in a motor
vehicle, including a frame having a tubular cen-V
ter member terminating in a bifurcated end por
tion having outwardly extending portionsl form
ing an engine cradle', a floating connection se
cured to the frame at a point adjacent the for
ward end of an engine'mounted therein, a sus
pension member having its -ends secured tothe
70
.4
2,106,541
bifurcateci frame portion and extending above
such cradle and overlying the engine, a yielding
and located in rear of said center of gravity, and
, connection between the engine and the suspension
through the medium of said unit. said frame being
resiliently connected to said unit at spaced points
member, and a transverse leaf spring carried by
the driving Wheels and overlying .and secured to
the engine.
7. A weight distributing mounting for a rear
engine in a motor vehicle adapted to increase
a chassis frame supported on said wheels only
located in rear of the center of gravity of the unit
and in advance thereof.
10. In a motor vehicle having a frame and
rear driving wheels, a propulsion unit disposed _
intermediate the- driving wheels and having its
center of gravity at a point forward of the trans 10
verse axis of said wheels, said propulsion unit
with the rear end of the vehicle frame, a cush
ioning connection between the frame and engine comprising engine, clutch, transmission and dif
at a pointadjacent the forward end of the engine, ferential mechanism and a unitary casing for
and a suspension member having its ends secured - housing the same, said unit having a forwardly
15 adjacent the ends of the engine cradle portion. extending bearing, a resilient engine mounting 15
' and extending upwardly thereof to overlie the secured to the vehicle frame adjacent the for
engine, a yielding connection between the engine ' ward end of said _propulsion unit and adapted to
the tractive eiiiciency of the driving wheels and
10 comprising an engine cradle formed integrally
and the suspension member, and a transverse
receive the said bearing, a bracket mounted on
said casing intermediate its ends and connected
to the rear portion of said frame for supporting 20
8. In a motor vehicle having rear driving the frame, and spring means connected to the
wheels, a power unit, a central longitudinal frame . driving wheels of the vehicle and- directly con
member bifurcated at its rear end to embrace said nected'with said propulsion unit.
11. In a motor vehicle having a frame and rear
unit and terminating short of the transverse
driving wheels, a propulsion unit disposed inter 25
wheel axis, said member being resiliently con
nected to- and suspended from the power unit at mediate the driving wheels and having-its center
a point in rear of its center of gravity,*said frame of gravity at a point forward ofthe transverse
also having a resilient point of connection with axis of said wheels, said propulsion unit compris
said unit in advance of the center of gravity, and ing engine, clutch, transmission and ldifferential
30 spring means in rear of such point of suspension mechanism and a unitary casing for housing the 30
for supporting the power unit and frame member same,- said unit having a forwardly extending
on the wheels, 'said spring means comprising a bearing, a resilient engine mounting secured to
transverse leaf spring located in rear' of the center the vehicle frame adjacent the forward end of
said propulsion unit and adapted to receive the
of ,gravity of said unit.
,
leaf spring carried by the driving wheels and
20 overlying and secured to the engine.
£3 Cil
9. In a -motor vehicle having rear driving
wheels, a propulsion unit adjacent the rear end
of the vehicle and disposed intermediate the driv
-ing wheels thereof, said`unit having its center of
gravity at a point forward of the transverse axis
40 of said driving wheels, a transverse leaf spring
for supporting said unit on the driving Wheels
said bearing, a bracket mounted on said casing 35
intermediate its ends and connected to the rear
portion of said frame for supporting the frame;
and spring means connected to the driving wheels
of the vehicle and directly connected with said
propulsion unit in 'rear of said center of gravity. 40
JOHN TJAARDA.
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