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Патент USA US2115124

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April 26,A 1938.
R. scHlTTKE
2,115,124
ANGULAR FAN DRIVE
`
Filed April 27, 1936
2 Sheets-Sheet l
April' 26, 193s.
R, SCHH-TKB
, 2,115,124
ANGULAR FAN DRIVE
`
Filed April 27, 193s
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2,115,124
Patented Apr. 26, 1938
_PATENT ori-‘ica
UNITED STATES
2,115,124
ANGULAR FAN DRIVE
Robert Schittke, Lansing, Mich., assignor to Gen
eral Motors Corporation, Detroit, Mich., a cor
poration of Delaware
Application April 27, 1936, Serial No. '76,535
3 Claims.
(Cl. 12S-170) i
This invention relates to cooling systems and
particularly to the cooling system applied to an
internal combustion engine used on an automo
tive vehicle.
In the prior art radiators of the Water cooling
systems of engines of automotive vehicles have
been flat and positioned at the front of the ve
hicle immediately ahead of the engine. The
trend of modern practice is to round and make
«i
narrower the front end of the vehicle which has
necessitated the narrowing of the radiator and
in some instances has caused a decrease in the
area of the radiating surface.
With a view to maintaining the radiating sur
;,5 face of the radiator core ample for all purposes
the radiator is made in angle form, or in the
shape of a V, so that the edge of the radiator
may extend forwardly Vimmediately behind the
usual grille and the sides diverge rearwardly to
_„ ward the two sides of the engine. This will en
¿o able the use of a larger radiator core and give a
greater radiating surface and in no way interfere
with the narrowing of the front portion of the
vehicle.
_
This making of a radiator into V shape insti
vehicle has the usual hood 4, the grille 6 at the
front, the wheels 8, the engine lll having the oil
pan l2, The engine has the usual crankshaft
the end i4 of which may be seen in Figure 1.
The usual cylinder head is indicated at I6 and
from the cylinder head the tube I8 of the _water
cooling system leads to the upper tank 253 of a
radiator indicated as a whole at 22. The crank
shaft i4 has Vthe fan belt pulley 24 secured there
to and -a second fan pulley 26 is mounted on the
0
engine above and in alignment with the fan pul
ley 24. A fan belt 28 passes around both pulleys
24 and 26 and drives the pulley 26 from the pul
ley 24; The usual water pump housing is indi
cated at 39 in which there is positioned the water 15
pump 32 (Figure li). The water pump S2 draws
the water of the cooling system from the bot
tom tank 33 of the radiator through the tube
34 and passes it into the engineV to cool the cyl
inders and other parts.
Referring to Figure 2 -it will be noted that the
radiator 22 is in V shape and is formed of the
two halves 36 and 3B. Behind the radiator 22
there is positioned the fan 4i! which is mounted
on a shaft 42 to which the pulley 26 is lrigidly
secured.
Referring to Figure 4 it Will be noted that the
shaft 42 comprises therear section 44 and the
'j tuted the problem of properly pulling the air
through the radiator by the usual blade fan. The
blades of the fan are ordinarily in the same
plane where a straight core radiator is used, but > front section 4B connected to each other in driv
., where a V-shaped radiator is used the ordinary ing relation by the gears 48. The shaft section 30
4S is mounted at an angle to the shaft section
straight plane fan is not applicable so it was
necessary to redesign the construction to utilize 44. The pump 32 is also secured to the shaft 44
a blade fan which could be positioned in the angle and operated thereby.
The rear shaft section 44 is mounted in a
of the V of the radiator. Accordingly, the fan
blades were bent rearwardly so that'in their ro
tation they generated a cone. The shaft on
which the fan is mounted projects Well forward
into the angle between the radiator halves while
the blades rotate closer adjacent the radiating
surface and are therefore better able to pull the
40
air through the core.
On the drawings
Figure 1 shows in dotted outline the hood and
wheels of an automotive vehicle and in full lines
45 the front portion of the engine with the V ra
diator and novel fan applied.
.
Figure 2 is a plan view of the novel V-shaped
radiator and fan.
Figure 3 is a view similar to Figure 2 of the
50 conventional construction.
.
Figures 4, 5, and 6 show diiferent modifica
tions of the application of the fan and the man
ner of driving it from the engine.
Referring to the drawings, the numeral 2 in
55 dicates an automotive vehicle as a whole. The
bracket 5B secured to the engine block.
The 35
ybracket is provided with the bearings 52 at the
rear thereof and the roller bearings 54 at the
front end thereof. The shaft section Y46 is
mounted in the roller bearings 55 and 58 and
has the fan 40 rigidly mounted thereon by means 40
of the pin 6i) passing through the hub B2 of the
fan and through the shaft.
Machine bolts 64
secure the fan blades 66 to the hub 62.
The
shaft section 46 is mounted in the auxiliary
bracket 68 which is secured to the bracket 5@ by 45
means of the machine bolts l0.
'
The usual means indicated at ‘l2 and 14 for
lubricating the shaft sections 44 and 46 are pro
vided.
The structure in Figure 5 diifers from that 50
shown in Figure 4 in that no water pump 32 is
driven from the shaft section 44'. The bracket
50’ is used to mount the outer shaft section 46
instead of the inner section 44’ and the auxiliary
bracket 68' has the bearings 52’ and 54’ in which 55k
>2,115,124
s
to mountthe'shaft 44’.> Thefan pulley 26’ isV ’rspecrtive of the length or diameter of thefan. Y
shaped slightly different than the corresponding
pulley 26 in Figureï4 buthas the sameìfunction.
This isl possible because the surface ofthe radi'
ator 22’ is flat and the fan 4D’ can easily be posi
The structure of Figure 6 differs from the struc- Y tioned closely adjacent the'radiator.
Ytureof Figure 5 in that a universalV joint 48” is
I claim:
'
~
'
used instead of the gears 48Y in Figures 4 and 5.
1. In a cooling .systemk frorrthe engine of Van Y
„The universal joint .mayY be any conventional automotive vehicle, a VV-shaped radiator mounted »
- type ofrjoin't and VperV se forms no part of the in
VVention. In theembodiment shown two forked
Ymembers interengage as shown so that'the outer
on the vehicle, a fan shaft mounted on and driven
from the engine, a fan attached to theshaft and i '
positioned immediatelyV behind and within thes'V
l0 "
shaftsection 46” is driven from` the inner shaft` LofV the radiator, blades on the fan, said blades v.
section 44€’. The bearing 54'-l is in the form of al r forming an acute angle with the shaft and gen-f` .
sleeve instead of the ball bearing 54 shown in
Figure 4;
shoWn'at/'IS and `has butga single vball bearing
j
-erating acone in their rotation whereby to cause « Y
The shaft section 46” is stepped -as Y air better to pass through both'sides ofthe V of
, the' radiator.
'58 to support it. The'hub 62” instead‘of .being> - »Y V2. ¿I_n ¿a «cooling system Yfor they engine ofV an
pinned t'o‘thejshaft end is Vsecured thereto by af automotive vehicle, a V‘-shaped radiator Ymounted
keyand slotconnectionlß.,e`
Y f»
" '_ ¿ Y' : Von the vehicle; a? two-sectioned fan shaft mounted u
¿,¿By' referring Vto-.Ii‘igures 1, 2V,V and 5 itwill be gon-.and driven fromrthe enginefrneansin the`
noted thatsthe blades lili4 of the fan'V instead of
shaft to enable one section thereof to be vdriven ï
„
. being ofthe shape'ofblades BS’Vin'Fig'ureB (which f at Vanïanrgle tothe other section, Yav fan secured . Y. É .j
>> lis thelconventionalishape) arebent rearwardly to the end of the shaftr and positio'nedïimmedif
Y [to forman angle with vthe Yshaft 46 'to' which »the atelybehind «and'within the V ofthe radiator;y
-
fan is'jattached. Accordingly, each blade, as it is ' blades on the fan, said blades forming 'an acute.,V
' rotated bythe shaft 415, generates aV conical sur
anglewith >the shaft'fsection to which the fan is"
face. - 'I-‘his- has been'V made necessary because ¿attached toenabl'e the Èfan better to conform yto;e5
" ’
with'a fan 40’ Ysuchas shown inli‘igure.3ft-wouldv the V> shape"of"the radiator. -1
¿
A be impossible -to position?the fan close Vinward to- .
InY a cooling system for Ythe enginefofean j
VVward the two halves-'36 and 38 ofthe radiator ‘automotive vehicle, a radiatori secured ¿to Ythe
_for the reason Ithat the‘tips'ßûof theblade's‘would ' engine',4 Vsaid Vradiator vhaving :one VVsections >thereof 30
. Ü
’out »intoïthe radiator. vBy 'making it `angulargor
diverg'ing toward the ¿rear as shownV in Figures 1, '
at an >angle tothe other section; a two-sectioned)V
2,'and-4,_Äit has` beenfp'ossible to positionv the
fan
one _section
shaft mountedronëand
y of said' shaftdriven
being from
tilted the
upwardly,
engine, - e
end'of lthe shaft 46 well forward into ftheangl'e of
35`
Y»
the 1vol?Y theY radiator and cause the fan blades fmean'sconn'ecting said_twofshaftsA a fan immedi- ‘
e
Y
n
`
` 66 t’oïrotate inV closer proximity to the radiator
halves y36 and v38 so'that as 'the fan is driven >from ‘
' atelyîbehind
bladesonmthefan,
the `radiatorand
"said bladessecured
forming
to the
an shaft,Y
acuta`ç . "
theu engineVY the closer interrelation betweenV the " angle .with> the shaft secticnto whichrrthe fan isv
~ i fan andl radiator will enable theï fan better to'VV attached, the rotation’of saidÍ fan generating'îa'
draw the air through vtheradiator and to 'drawsv cone;~the sides of the angle formed in the fan cone
substantially equal quantities through the two f ' by' passing‘a plane horizontally through the'cen-V '
halves 35 and '38..
ter -of vthe vcone and the radiatorfbeing parallel*V
' In'Figure 3'the usualtypeof radiator 22" and Y to the sides of the angmïform'ed by the sections Y
Vthe‘fan 40’Y oifer'no problem because it is possible
45 to position the fan close up to the radiator irre- Y~
ofthe radiator.
`
ROBERT sonrr'rrrr:.`Y Y "
.I
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