US1334008A - Gearing - Google Patents

Description

K. ALQUIST.

GEARING.

APPLICATION FILED IAN. Ie. ISIS.

Patented Mar. 16, 1920.

UNITED STATES PATENT OFFICE.

KARL ALQUIST, OF SCHENECTADY, NEW YORK.

GEARING.

Application le January 16, 1218.

To @ZZ Lo/wm t may concern.'

Be it known that I, KARL ALQUIs'r, a. subject of the King of Sweden, residing at Schenectac y. in the county of Schenectady,

' State of New York, have invented'certain new and useful Improvements in Gearing, of which the following is a specification.

The present invention relates t0 gearing of the single reduction type wherein a pinion drives a low speed gear `wheel through two intermediate gear wheels which transmit the load in parallel.l The pinion is usually balanced between theA two intermediate gear wheels, which in turn mesh with the driven gear wheel. Y

lIn a Vgearing of this type the strain on the teeth Aand the wear of the tooth surface is much greater between the pinion and the intermediate gear wheels than' it is between the intermediate gear wheels and thelow speed wheel. This is at once apparent from a consideration of the diameters of the respective wheels. Owing'to the small diameter of the pinion there is not 'the same extent of contacting surface between it and the` intermediate gear wheels that there is between the inte mediate gear wheels and the low speed wheel, and also the teeth of the pinion are more carved. As a result the output of a gearmg of this type is limited to that which can be transmitted between the pinion and the intermediate gear wheels, while the teeth of the intermediate gear wheels engaging the low speed gear wheel could yeasily carry a much larger load both with reference to wear and strength of the teeth. The resultis, therefore. that the pinion is the only member of the gear train which is working to capacity. i

YIt is always desirable in a gearing that all parts, so far as possible, do the maximum .work of which they are capable; z'. e., that all'parts be loaded to the same extent in regard to stresses, as this means the highest output with the lowest weight. This is important, not only as concerns the cost of manufacture, but also is often ofrprimary importance in connection with the use to which the gearing is to be put.v For example, in the ease of ship propulsion, it is very important that the gearing, well as the other machinery, 'be as light as possible. The object of the present invention is to provide an improved structure and arrangement in a gearing of the type referred to above wherein the gearing members will be Specification of Letters Patent.

Patented Mal'. 16, 1920.

sei-iai No. 212,029.

much more nearly loaded to the same extent, and for a consideration of what believe to be novel and my invention, attention is directedto the accompanying specification and the claims appended thereto.

1n the drawing, Figure 1 is a side yelevation of a gearing embodyingk my invention, and Fig. Q is a diagrammatic end view thereof.

Referring to the drawing, the central portion of Fig. 1 shows the known arrangement of this type of gearing wherein a pinion 5 carried by a shaft 6 drives a low speed gear wheel 7 located on ay shaft S, through two intermediate gear wheels 9V and 10 carried by shafts 11 and 12 respectively. lThe pinion y5 is balanced between the gear wheels 9 and 10 and such gear wheels transmit the load in parallel from the pinion 5 to the low speed gear wheel 7.

Now as alreadyv stated, the limiting inember as to output of such a known type of y gearing is the pinion 5, the intermediate gear wheels 9 and 1() being capable of transmitting a much greater load to the low speed wheel 7 than that whichV the pinion can transmit to them. According t0 my invention, therefore, l provide additional means for supplying power directly vto the intermediate gear wheels 9 and 10 independently of the pinion 5, and to this end I extend the yends of the pinion shaft 6 and mount thereon pinion members or parte 13, 13a, which mesh with intermediate gear wheels or gear wheel parts 14, 14, and 15,15a mounted on extensions of shafts 11 and`12 respectively. The shaft extensions may be an integral part off the shafts, as shown in the case of shafts 11 and 12, or such extensions may vbe formed separately and coupled to the shaft,

as shown in the case of the pinion shaft 6.v4

lilith this arrangement, it will be seen, additional power will be transmitted from shaft C, to intermediate gear wheels 9 and 10 by means of the pinion members 13, laand gear wheel members 14, 14, 15, 15a, and as centhalves lof thepinion 5 and intermediate that Y gearing of the known type r if) il gear wheels 9 and 10. Hor.' rer, it will be understood that l ain not limited to this ai'- rangement.

VTheinterniediate gear `wheels 9 andlOand the intermediate gear wheel parts 14,14%"15 and ll are shown as being of the flexible type invented by ine which eoinprises'a plurality of plates or disks rigidly mounted on a suitable support and slightly spaced apart at their outer edges to permit of slight axial yielding under tooth pressures. Such a rear Y wheel is disclosed nin' ,Y d intenso. metisse, dated December 28, 1915, and ile l' prefer to use it, it to be understood that nig' in fentioii is not liniitld thereto.V

The respective shafts G, 8, .11 and f ire provided .Y with suitable bearings lo', the shaft 6 being provided preferably with four snch bearings, and the remaining shafts Iwith two each, the intermediate gear wheelVV Y gear Wheel parts 111, 14a and 15, 15a are y Leral part '0f the rie-i011 .5

Jv9 `and 10.

shown as being spaced some distance from the pinion `and intermediate gear wheels' 9 and 10`to Vaccoinniodate bearings between them, the Vgear wheel parts 14:, 14%, 15 and 15.l being overhung on their respective shafts. It will beunderstood, however, that they need not be thus spaced apart, but may be brought closer together, if found desirable, and in fact may be made as an inte- `A'piiiion ,drive,;as shown in Fig.

.l ,d 1, may vprovided on only one side yofthe gear wheel 7, or it may be duplicated on the op- Ypiisite side, as indicated at. A and .B in Fig.

This 'latter arrangement is found advantageoiis for example, in ship propulsion,

- wherev itv is desired yto utilize two vprime movers to drive .ya single propeller shaft.

Yln,acoordance with the .provisions of the i'iatent l.,iies., l have described the principle of operation of my invention, together I with the apparatus which l'now considerA to represent Ythe best embodiment thereof;

I desire Fto have vit'understood that the apparatus shown Vis only illustrative andV other ineens. c

What I claim as new and desire to secure Letters :Patenty of the United States, is: I

i l. In combination, a high speed shaft, a

that the invention can be carried out byw Y low shaft, V,gearing through which pinion.

and gear wheels which do not',

' wheel means.

yspeed d Y `lia-ving portions which inesh with the'teetli lof l,said low speedgear wheel and portions' wheel. means which mesh `directly with V,said pin* power is transmitted from one to they other, said gearing comprising a pinion on the high speedshaft, a gear wheel on the low speed shaft, and a gear wheel which runs at a speed intermediate between that of the two shafts, and meshes directli7 with the pinion Land rst named gear wheel, and

means for transmitting power from the high speed shaft directly to said intermediate gear wheel independentl;v of said 2. In combination, a high speed shaft. a low speed shaft, gearing through which power is transmitted from one tothe other`l said gearing comprising pinion lon the high speed shaft, a gear wheel. on the low speed shaft, and a ,gear wheel which runs at a speed intermediate between .that of the ,two shafts Vand meshes directlv with the pinion and first named gear wheel, ,and additional gearing means which transmits power from said ,high speed shaft to .said

said pinion. Y Y v A 3. The ycombination with ya gearing coinprising a shaft, a high speed pinion there on, a low `speed vgear wheel, and two intermediate gear Ywheels which mesh with the intermediate gear wheel independently `of pinion and lowpspeed gear wheel and trans-Y mit power from one ,to .the other, of means for supplyingy power from said Shaft to the intermediate gear wheels independently of said pinion.

The combination with a gearing come prising a shaft, a4 high speed :pinion theren on, a low speed gear wheel, and two intermediate gear wheels .which mesh with l,the pinion and low `speed gear wheel and tiaiis-V independent Vof the Vpinion for supplying additionalv power to both the intermediate Y gear -iv heels.v

,In gearing, the combination of alow inieans shaving portions which mesh idirectly with Vthe low Ispeed gear wheel and portions anda shaftr having pinion means thereon which ymesh directly with all the portions of `said,interinediateV gear 6. ln a gearing, the combination of a low gearwheel, flexible gear wheel means which are not inV mesh therewith, and pinion means which mesh directly with lsaid iieXible gear wheel means over their entire axial length. Y

7. In gearing, the combination of a shaft' carrying pinion means, a 'low speed gear and two intermediate gear Y wheel ion means and .said low speed gear wheel init-power freindV oneto the other, ofineans,

speed gear wheel, intermediate gear wheel and Vtransmit `the load in parallel from one tov theother, low speed gear wheel having a driving face of less axial Width than that of the pinion means and intermediate gear wheel means.

8. The combination with a gearing coinprising a shaft, a high speed pinion thereon, a low speed gear Wheel, and two shafts carrying intermediate gear wheels which mesh with the pinion and low speed gear.

Wheel and transmit power from one to the other, of meshing gear Wheel members mounted on extensions of said pinion and intermediate gea-r Wheel shafts which serve te transmit power direetlg,T to said interme diate gear wheel independently of said Y, pinien.

9. The Combination with a gearing comprising a shaft, a high speed pinion thereon, a 10W vspeed gear Wheel, and two shafts carrying intermediate gear Wheels which mesh with the pinion and loir7 speed gear Wheel and transmit power from one to the other, of meshing gear Wheel members mounted on extensions of, said pinion and intermediate gear wheel shafts which serve to transmit power directly to said intermediate gear Wheels independently of said pinion, said intermediate gear Wheels and the gear Wheel members mounted on the extensions of the intermediate gear Wheel shafts being iexible.

In Witness whereof, I have hereunto set my hand this Mthvday of January, 1918.

KARL ALQUIST.

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