US889769A - Change-speed gearing. - Google Patents

Description

. PATENIED JUNE 2, 1908. J. L. DIDIER.

CHANGE SPEED GEARING.

APPLICATION FILED umze, 1907.

3 SHEETS-SHEET l.

No. 889,769. PATENTED JUNE 2, 1908. J. L. DIDIER.

CHANGE SPEED GEARING.

APPLIOATION FILED JAN. 2s. 1907.

M291 66.5 els, Zzy/zqgf 3 SHEETS-SHEET 2.

No. 889,769. PATENTED JUNE 2, 1908. J. L. DIDIER.

CHANGE SPEED GEARING.

APPLICATION FILED JAN. ze

1907. 3 SHEETS-SHEET a.

" tais,

0F sr. cILoUIi, FRANCE CHANGE-snmp GEARING.'

To'all whomit may concern.; f 'Belitgknown that I, JULES LoUIs DIDIER, engineen'citizen of the French Republic, residing at StL-Cloud, Department of Seine, Oise,y France,fhaving post-:office address 26 Pare de Moutretout, inthe said city, have invented certain new and useful Improvements in Epicyclic vChange-Speed Gearings, of which the following is a specification.

This invention relates to improvements'in epicyclic change speed vgearing and has for its 'main object to provide means for locking the planet"pinions when `the mechanism is operated'fin order'to obtain the high speed in direct mesh. y

The accom ia'nying drawings show, by way of examp e,'change`spee`d mechanisms, and for/obtaining the high speed the'planet pinions are locked .b v clasping between two parallel plates the saidfpinions, one of said plates carryingtheaxles of the said pinions. In the drawings: Figure 1 is a longitudinal sectional View of the invention, the mechanism 'thereof'being shown in low speed position. Fig. 1a is a longitudinal sectional -view showing the mechanism in high speedl position. Fig. 2 is a front elevation ol' theinvention. j `Fi 3 is a fragmentary view in section ofa modlfiedform of the invention.v Fig. 4 is alongitudinal section of 4another form of the Iinvention, whereby" different I'relative slpeeds of rotation `of the two shaftsin one irecti'on is obtainable or relative forward and reversevmotions of theitwo shafts may be obtained, according to the `ratios of the gears.

F ig. 5 is an end elevation thereof. Fig. 6 is a reverse end-elevation of a part of themechanism shown inFig; 4. v

In the-mechanism shown `Figs. 1 and-2, the motorshaft 1- carriesfat it'sfextremity and keyed upon it a pinionf2-which meshes with a numbery of planet pinions 3. ,"I`heseplanet pinions, `the width of-thc teeth of which is slightly greater'than thatof'the pinion 2, are mounted loosely upon shafts-ffixedto aplate 5.y This plate 5.is solid with the `shaftv to bedriven,fand it is mounted loosely upon-a prolongatio'n7 ofthe motorl shaft 1. The planet pinions 3 are in mesh withan-mternally toothed crown 8 whichissolid with a box y9 9 .capable of rotating ,idly upon the shaft 1 and the shaft 6. .2 Therbox 9 9 carries onitsperi hery` abrakecrowni() andit is terminate by-'a platell-onthe side opposite to the motor sha-ft.j i-Aspring 16 kismounted between the part 9 and the plate 5 to nory y.Spe eileation of Letters Patent, i ,i happlic'aaon aaaqJan'uary 28,1907. Summen-,527.'

Inally gdraw ythelatter and plate 9 toward eachfv other.v Saidpla'te '5"and 4part 9 have between them the -planet pinions, which latter are provided Vwithcheeks'12l and 12 bearing respectively upon they cheek of the parti) and the plate 5. In the box 9 9 the f caring surfaceislconstitutedV by a circular crown having its center upon the axis'of the shaft 1. VThis crown is solid with thev box;

through the centers, ofthe planet pinions and its Aheight is `equal to the diameter of the cheeksflZ. Upon the plateE 5 vthere are as planet pinions; l A,

The shaft is connected with athe parts of the engine 0r of the motor vehicle that it is'l desired to rotate by means of anyy appropriate coupling, for exam v le, a cardancouplmgas in'Figs. land' 1, l `inally anoperatm fork 13 may bear upon the plate lland the rake band 14 may be applied upon the brake pulley10 *y .1, 'l` he operationis as follows :4*

pressed b v means of the fork 13. f The movement of lthe part 5 towardsthe' left hand of the figure is prevented by 'the stop 15. The box 9 9 moves'to'wards the left' hand and the planet p inionsare released'.v wAt lthe ysame time the brake 'band 14 is tightenedin .such a manner as to lock the box 9 9. I In these conditions the shaft 1 in rotating kcauses fthe planet,v pinions torotate, -andl'they rollinand the part 5, and therefore the shaft `6, are.v driven in the same` direction as the shaft 1, but vat a redce'd speed which depends thefork13 Is abandoned. *Under the influheld between 5 and 9 andy conse( uently can no longer rotate if the strength o the: spring 16 isI sufficient. The entire system then rotates in one piece and conse( uently the shaft 6 rotates at the same spee as the shaftfl.

' planety p`inions,1these latter are stopped by mentof rotation round the shaft 4 and around the shaft 1.1 LThis contributes to producing a progressive` en agement.

3. Disengagement: T ie fork 13 is acted upon in such a ,mannerv as to permit ,off the rotation of the planet pinions, and the brake meneame?, igual;

its mean radius is that ofthefcirclel passing many circularbearing surfaces as there are 1. Low speed: `The spring-16 is com` upon the relative diameters. of .the pinions.v

2.-? High s )eedv The brake islreleased and ence of the spring' 16 theplanet pinionsare,

Atlthe momeutat which theplates holdthe side the crmvn;` consequentlythe shaft 4 w the friction resulting from their'doub e move.-

` mesh with the bi p ate movin the crown 8. e

In the mechanism re resented in Figs. 4, 5, and 6, the motor sha tI .carries at its ex-l tremity a fly-wheel 17 upon whichthereare fixed a certain number o shafts 1'8 (three in the example represented). Upon these shafts there rotate i the pinions 19 meshingwith a crown 20 solid with the shaft 6 tobe driven,` which is arraned in alinement'with the mo ach pinion 19 is solid with tor shaft 1.

inion 21 meshing with a toothed crown" 22 xed upon a sleeve 23 capable of. rotating freely on the shaft 6 to be driven andcarrying a brake drum 24. l.A plate 25J is driven by the fly-wheel in its movement of rotation means of bolts 26, which allowv of this paratus. T ese bolts 26 are carried b a art 27 boltedon to the fly-wheel 17. y-wheel constitutes'a box and vcontains the various parts of the clutch and change speed mechan1sm,and the part 27 forms a `cover serving as a dust excludr and permitting of filling the interior with oil for the lubrication ofthe mechanism. A number of sprin s 28 are interposed between the part 27 an the plate 25 constantly pressing this latter towards the left hand of Fig. 4. In order to bring the plate 'back towards the right hand, levers 29 mounted with a ball and socket joint at`30 around shafts 31 fixed to the part 27, engagewith one of their extremities in a v notch 32 in the plate 25, the other extremit7 bearing against a stop 33l carried by a bal bearing 34 capable of sliding paralle l with the axis ofthe apparatus under the in u ence (of a fork 35.

The pinions 19 are provided with two lcheeks` 36 and 37 caplable of coming into contact respectively wit the circular bearin surfaces 38 solid with the flywheel and the bearingsurfaces 39 solid with the plate. These bearing surfaces 38'and 39 are of the same diameter as the cheeks 36 and 37, and have likewise for centers the axes of the shafts 18'.

The ap aratus operates in the following manner: or the hlgh speed, under the infiuence of the sprin 28 the plate 25' is pressed. towards the eft hand of Fig. 4 and the assembl e o f pinions 19 and 21 is powerfully held etween the plate and tlie iiywheel. In these conditions the pinions 19 and 21 are no lon er able to rotate around their shafts 18 andv act in the manner of a dog and drive the crowns 20 and 22. The driven shaft solid with the crown 20 Ehen be-v freely along the axis ofthe ap-y gins to rotate in the same direction and at the same speed as the drivin shaft. `When the high speedis thrown in, t e pinions 19 and 21 are revented from moving upon themselves by the friction of their cheeks upon the bearing surfaces 38 and 39.; this contributes to produce a progressive engagement.

In order to effect disengagement, the fork 35 is acted uponiriv such a manner as to press back the ball bearing 34 towards the left hand of the fi e( The llevers 29 rock around their soc ets 30 and the plate 25 is separated from the cheeks 37 At this momentthe planet pinions 19 and 21 become free to rotate around the shafts 18. The

crowrf- 20, -Whichis subjected to a resistant couple, tends to remain at rest, while nothing o poses the movements of the crown 22.

he shafts of the planet pinions being driven by the rotation o the fly-wheel, the pinions 19 rollupon the crown 20 while rotating upon themselves and drivin the pinions 21 which cause the rotation of t e crown 22 solid with the brake drum. The driven shaft remains at rest.

For the low speed, the apparatus being in its released position, the brake arranged upon the drum 24 is applied. The crown 22 is locked and the fly-wheel being driven in the` direction indicated by the arrow 40, the pin-l ions 21 roll upon the crown 22 in turning upon themselves in the direction indicated by the arrow 41, driving the lpinions 19. Those pinions meshing with the crown 20 produce the rotation of this latter and consequently the rotation of the drivenshaft. The inions 19 thenv have a double movement o rotation; in the first place the movement around the axis of the apparatus, in the direction indicated by the arrow 40,'tends to cause the crown 20 to rotate in the same direction and at the same speed as the driving shaft; secondly the movement around the shafts 18, inthe direction indicated by the arrow 41, tends on the other hand to impart to the crown 20a movement in the op osite direction to the foregoing. Owing to t e rotation of the crown 20 resulting from the su' perposition of these two movements, it is obvious that this crown, and consequently the driven shaft, will he 4driven'at a lower speed than that of the driving shaft, and this driving may be in the same direction or in theopposite direction according to the ratios of the gear wheels. The device is therefore capable of furnishing, according to the ratios of the gear wheels, elther a clutch and reversing mechanism or a clutch and a change speed mechanism.

The princi al advantages of the device are as follows: he inions are always in mesh, the'device occuples but little s ace and is of small wei ht, the lubrication o the mechanism is rea ily effected and the pinions may be caused to rotate in an oil bath.

Having thus described and ascertained the nature of my invention and in what manner the same maybe performed, I declare that what I claim is:

1. A change speed -gearing comprising driving and driven elements, motion transmitting devices operatively -connected to the respective elements, and a pair of relatively movable plates arranged to frictionally engage the motion transmitting devices between them and form a direct driving connection between said elements.`

2. A change speed gearing comprising driving and-driven shafts, revoluble motion transmitting devices operatively .connected to the respective shafts for effectingrotation of the latter at different relative speeds, and a pair of 'plates for non-rotatably holding said motion transmitting devicesto form a direct driving connection between the shafts.

3. A change speed gearing comprisingdriving and (Iriven shafts, a pair of `plates arranged axially thereon, a set of planetary motion `transmitting devices journaled on the axles carriedby one of the plates and having an operative connection with the shafts, and means for proximating said plates to non-revolubly hold said motiontransmitting devices between th'cm and form a direct driving connection between the shafts. i

4. A change speed gearing comprising driving andv driven shafts, a'pair of plates centered axially of the shafts, one of the plates having a set of axles thereon, pinions ]0urnaled on said axles and having an operative connection with said shafts, and 'means for proximating the plates to frictionally engage the pinions to prevent rotation thereof and form a direct driving connection between i the shafts.

5. A chan re speed gearing comprising driving and c riven shafts, a p airof plates mounted so as to permit relative axial movement, and a set of planetary pinions interposed between the lates and iournaled on one of thelatter, saidpinions having an operative connection with said shafts for effecting rotation of the shafts at differentv relative speeds, and means for roximating the plates to non-rotatably hol the inions and orm a directd'riving connection etween the shafts.

6. A chan e speed gearing comprising driving and riven shafts, a pair of plates 'driving and mounted s o as to permit relative axial movement, a set of planetary pinions journaled on one of the plates and adapted to have a driving connection with the shafts, said vpinions having friction cheeks on opposite ends, and means for proXimating the plates to engage said cheeks to prevent rotation of the pinions and forma direct driving connection between the shafts.

7. 'A change speed gear com rising driving and driven shafts, a pair of pates mounted so as to permit relative axial movement, a set of planetary pinions journaled on one of the plates and adapted to be frictionally held between the latter, a pinion fixed to one of the shafts and cooperating with the planetary pinions, a gear element 'also cooperating with the planetary pinions, and a brake for preventing rotation of the said gear element when the planetary pinions-are disengaged from said plates.

8. A change speed gearingl comprising driven shafts, a pair of plates mounted so as to permit relative axial movement thereon, oneof said plates being fixed to one of the shafts, a pinion fixed to the other shaft, a set of )lanetary pinions .journaled on the )late xed to the shaft first mentioned and cooperating with said shaft pinion, a gear element cooperating with the )lanetary pinions, a brake for non-rotatably holding said gear element, and means for proximating said plates for non-rotatably iolding the planetary pinions to form a direct driving connection between the shafts.

9'. A change' speed gearing comprising driving and driven shafts, a pair of friction plates centered axially thereof, a set of planetary pinions journaled to revolve between said platesandfhaving an operative connection with both of the shafts for effecting a differentiall speed of rotation off the latter, a spring for proximatinr said plates to frictionally engage the ends of said pinions to form a direct drivin connection between the shafts, and a device for separating said plates to release the pinions and permit rotation thereof.

In testimony whereof I have hereunto set my hand in presence of two -subscribing.,

witnesses.

JULES LOUIS` DIDIER. Witnesses:

EMILE KLoTz, MAA DE RIVAUD.

Images