US2115124A - Angular fan drive - Google Patents

Description

April 26,A 1938. R. scHlTTKE 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 2 sheets-sheet, 2

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n @TW I' i?,v 012( 70 Z gmc/Wto@ @Maffay/w@ Patented Apr. 26, 1938 UNITED STATES ANGULAR FAN DRIVE Robert Schittke, Lansing, Mich., assignor to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application April 27, 1936, Serial No. '76,535

3 Claims.

This invention relates to cooling systems and particularly to the cooling system applied to an internal combustion engine used on an automotive vehicle.

i 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 vehicle immediately ahead of the engine. The trend of modern practice is to round and make 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 toward the two sides of the engine. This will eno 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- '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 where a V-shaped radiator is used the ordinary straight plane fan is not applicable so it was necessary to redesign the construction to utilize a blade fan which could be positioned in the angle of the V of the radiator. Accordingly, the fan blades were bent rearwardly so that'in their rotation 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 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 radiator 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 modifications of the application of the fan and the manner of driving it from the engine.

Referring to the drawings, the numeral 2 in- 55 dicates an automotive vehicle as a whole. The

ybracket is provided with the bearings 52 at the surface and are therefore better able to pull the (Cl. 12S-170) i 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 crankshaft i4 has Vthe fan belt pulley 24 secured thereto and -a second fan pulley 26 is mounted on the engine above and in alignment with the fan pulley 24. A fan belt 28 passes around both pulleys 24 and 26 and drives the pulley 26 from the pulley 24; The usual water pump housing is indicated 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 bottom tank 33 of the radiator through the tube 34 and passes it into the engineV to cool the cylinders 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 front section 4B connected to each other in driving relation by the gears 48. The shaft section 4S is mounted at an angle to the shaft section 44. The pump 32 is also secured to the shaft 44 and operated thereby.

The rear shaft section 44 is mounted in a bracket B secured to the engine block. The 35 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 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 provided.

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 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 to mountthe'shaft 44. Thefan pulley 26 isV shaped slightly different than the corresponding pulley 26 in Figure4 buthas the samefunction.

The structure of Figure 6 differs from the struc- Y Ytureof Figure 5 in that a universalV joint 48 is used instead of the gears 48Y in Figures 4 and 5.

The universal joint .mayY be any conventional 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 outershaftsection 46 is driven from` the inner shaft` section 44. The bearing 54'-l is in the form of al sleeve instead of the ball bearing 54 shown in Figure 4; The shaft section 46 is stepped -as Y shoWn'at/'IS and `has butga single vball bearing '58 to support it. The'hub 62 insteadof .being pinned t'othejshaft end is Vsecured thereto by af j keyand slotconnectionl.,e` Y f Y' ,By' referring Vto-.Iiigures 1, 2V,V and 5 itwill be noted thatsthe blades lili4 of the fan'V instead of being ofthe shape'ofblades BSVin'Fig'ureB (which f lis thelconventionalishape) arebent rearwardly Y [to forman angle with vthe Yshaft 46 'to' which the fan is'jattached. Accordingly, each blade, as it is rotated bythe shaft 415, generates aV conical surface. 'I-hishas been'V made necessary because with'a fan 40 Ysuchas shown inliigure.3ft-wouldv A be impossible -to positionthe fan close Vinward to- VVward the two halves-'36 and 38 ofthe radiator for the reason Ithat thetips'of theblade'swould out intothe radiator. vBy 'making it `angulargor diverg'ing toward the rear as shownV in Figures 1,

2,'and-4, it has` beenfp'ossible to positionv the end'of lthe shaft 46 well forward into ftheangl'e of 35` e Y n Y 66 torotate inV closer proximity to the radiator halves y36 and v38 so'that as 'the fan is driven from the 1vol?Y theY radiator and cause the fan blades theu engineVY the closer interrelation betweenV the i fan andl radiator will enable the fan better to'VV draw the air through vtheradiator and to 'drawsv substantially equal quantities through the two f halves 35 and '38..

' In'Figure 3'the usualtypeof radiator 22" and Vthefan 40Y oifer'no problem because it is possible to position the fan close up to the radiator irre- Y rspecrtive of the length or diameter of thefan. Y

, the' radiator.

- Y V2. I n a cooling system Yfor they engine ofV an Y to the sides of the angmform'ed by the ofthe radiator.

This isl possible because the surface ofthe radi'- ator 22 is flat and the fan 4D can easily be positioned closely adjacent the'radiator.

I claim: 1. In a cooling .systemk frorrthe engine of Van Y automotive vehicle, a VVshaped radiator mounted 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 LofV the radiator, blades on the fan, said blades v. r forming an acute angle with the shaft and gen-f` -erating acone in their rotation whereby to cause Y air better to pass through both'sides ofthe V of automotive vehicle, a Vshaped radiator Ymounted Von the vehicle; a? two-sectioned fan shaft mounted u gon-.and driven fromrthe enginefrneansin the` shaft to enable one section thereof to be vdriven at Vananrgle tothe other section, Yav fan secured Y. .j to the end of the shaftr and positio'nedimmedifatelybehind and'within the V ofthe radiator;y

the V shape"of"the radiator. -1

' blades on the fan, said blades forming 'an acute.,V .I

anglewith the shaft'fsection to which the fan is" attached toenabl'e the fan better to e5 conform yto;

InY a cooling system for Ythe enginefofean j automotive vehicle, a radiatori secured to Ythe engine',4 Vsaid Vradiator vhaving :one VVsections thereof at an angle tothe other section; a two-sectioned)V fan shaft mountedronand driven from the engine, one section y of said' shaft being tilted upwardly, e

ter -of vthe vcone and the radiatorfbeing parallel*V sections Y ROBERT sonrr'rrrr:.`Y Y

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