US2186522A - Pinion assembly for use with rolls or the like - Google Patents

Description

Jan. 9, 1940. 2,186,522 l PINIoN ASSEMBLY FOR USE WITH ROLLS on THE LIKE W. I...A DITG ES 4' Sheets-Sheet l Filed June* 30, 1939 Jams, 1940. wjl.. DITGES- l 2,186,522-

PINION ASSEMBLY FOR USE WITH ROLLS OR THE LIKE Filed June 50, 1939 4 Sheets-Sheet 2 Jan 9 1940, w. D11-GES 2,186,522

PINION ASSEMBLY FOR US WITH ROLLS OR THE LIKE Filed June 30, 1939 4 Sheets-Sheet 3 Jan. 9, 1940. w. DITGES` 2,186,522

PINION ASSEMBLY FOR USE WITH ROLLS 0R THE LIKE Filed June 30, 1939 4 Sheets-Sheet 4 gmc/Mofo MWWW with the pinions I8 and 20. Therefore, pinion I9 transmits the entire rotative effort at four points diagonally opposed. It is obvious that `the resulting forces imposed on the main driving pinion are balanced and relieve the pinion bearings of all pressures. y

In Fig. 5, I have diagrammatically illustrated a conventional assembly of pinions arranged in relative positions to work rolls inY the lattener. It is to be observed that pinion I9a is the driver which obtains its power from a source not shown. Pinion I9a meshes with pinions I6a and I 'Ia which in turn mesh with pinions I8a and 29a.

It is obvious that in transmitting the total power, pinion I9a transmits one-iifth of the total power to the roll in the flattener to which it is connected. 'I'he rest of the 'power or fourfifths of the' total power will have to be transmitted through the pinion teeth of pinion I90L.V

As each pinion requires one-fifth of the total power, it will be necessary to transmit two-fifths at the meshing point of pinion I9a and I6a and I9a and IIa, and one-.fifth at the meshing point of pinion I6a and I8a and I'Ia and 20a..

An analysis of the forces to be transmitted through thesepinions shows the tooth loads and resultant bearing loads to bein excess for practical consideration, vFor example, attention is directed tofpinion IIa, where the tooth load rei action I and `the spreading force reaction I, re.Y

sulting frompinion I 9a transmitting two-fifths of the total power to pinion I 6a, show a lre-` sultant as indicated S. F. & T. L. R. 1. Now pinion I6a in transmitting one-fifth lof the total power to pinion I8a shows atooth` load reaction of Tl L "R, 42 and a spreading force reaction of S. F. R. 2. The resultant being Sv. F. -& T. L. R. 2. The resultant of these two resultants is indicated as resultantI 1 and 2 which is the force to be absorbed by .the bearings of pinion I6a.

The resultant force for pinion I8a is even more extreme than that of pinion Ilia, as shown graphically. Thus, one is confronted with an impossible condition, and tomake it possible, I

.- resort to the construction shown in Fig. .6

wherein-,I retain pinions I6, I1, I8, I9 and 20 and add two idler pinions 2| and 22;

" Pinion I9 is still the driver and transmits the total power to the work rolls of the attener.

.Howeven in this assembly the transmission is different than in Fig. 5 in that pinion I9 transmitsan equal amount of power' to each ofthe work rolls ofthe lattener by transmitting onefth to each pinion I6, I1, I8 and 29,. and onefifth directztov the corresponding work roll to.

Which it is connected. It is to be observed that pinions I5 and I8 do not mesh, nor do I'I and 20 as'they did'in Fig. 5. Thus, the one-fifththat pinion I9 transmits to `each of pinions 'I8 and 2i! is through idlers 2| and l22, respectively.

. It will be obvious to one familiar with the art; that the maximum vtooth loads in arrangement Fig. 6=are only one-half of the maximum tooth loads establishedfin Fig. 5, and that for thisreason theres'ultant forces are of an equally u reduced magnitude.

It is also obvious that in Fig. 5 the'maximum force is set up in vthe driving pinion |911` on account of the unbalanced transmission of force typical ofthis arrangement whereas in Fig. 6 the corresponding forces in driving pinion I9 are only about 33% of that in Fig. 5 and are diametrically opposed and therefore balanced. Thisbalanced condition of forces' relieves the bearings' of themain driving pinion of all loads "such manner that the same may be readily understood by those: skilled in the art, I am aware that changes may be made in the details disclosed withoutdeparting from the spirit of the invention as expressed in the claims.

What I desire to secure by Letters Patent is:

l. In mechanism for driving the rolls of metal plate flattening machines or the like, a support, a main toothed pinion journalled in said support and provided at one end with a driven element and at the opposite end with a driving element,`

a rst pair of pinions jcurnalled in said support and having teeth meshing with the teeth of `the main pinion, each pinion of .said vpair having a driving element at one end thereof, a second pair of toothed pinions journalled in the support, arranged at opposite sides of the main pinion and having driving elements at one end thereof, and a pair of idler pinions journalled in the support and having teeth meshing with thefteeth of the main pinion and the teeth of the second pair of pinions, the pinions of the first pair and the idler pinions being spaced circumferentially around said main pinion to neutralize thrust.

2. In mechanism for driving the rolls of metal plateiiattening machines or the'like, a support, a main toothed pinion journalled in said support and provided at one end with means for driving the same and at the opposite end with a driving element, a irst pair of pinions journalled in said support above the main pinion. Aand having teeth meshing with the teeth of the -main pinion, each pinion of said pair having a driving element at one end thereof, a second pair 'of toothed pinions jour-nalled in the support atop` posite sides of the main pinion and having theirY axes in the same horizontal plane as the axis 'of the main pinion, and a vpair of idler pinions journalled in the support below the main pinion and having teeth meshing with the' teeth ofthe main pinion and the teeth of the second pair of pinions, the pinions of the first pair and. the idler pinions being lspaced circumferentially around said main pinion to neutralize thrust. 'y

3. In mechanism. for driving the rolls of metal plate flattening machines or the like, a support, a main toothed pinion journalled in said support and provided at one end with means for driving the same and at the opposite end with a driv-V ing element. second and third pinions journalled in said support and having teeth meshing with the teeth'of the main pinion, each of the second and third pinions having asdriving'element at one end thereof, fourth and fifth pinions journalled in the `supportat opposite sides of the main .pinion and having driving elements at 'one end thereof, and a pair of idler'pinions' journalled err .2,186,5221 y 'fr 3 thirdpinion, the second and third pinionsand the 5 plate flattening machines or. the like, a support, a l

main toothed pinion journalled in said support and provided at onevend with means for driving the same andat the opposite end with a driving element, a first pair of pinions journalled in said g 10 support and having teeth meshing with the' teeth of the main pinion, each pinion of said pair hav- 'ing a driving element at one'end thereof, a second pair of pinions journalled in the support and having teeth spaced from the teeth of the "main 15 pinion and the teeth of the rst pairof pinions,

the pinions of the second pair being arranged'at opposite sides of the main' pinion and havingV driving elements at one end thereof, and a pair pinion and the teeth of the second pair of pinions, the pinions of the first pair and the idler pinions being spaced circumferentiallyaround Y' pinion to neutralize thrust.

said main pinion to neutralize thrust. A l 25 5. In mechanism for driving the rolls of metal plate atteningmachines or the like,` a support,

a main toothed -pinion rjournalled'insaid support and provided at one end with means for driving Y the same 'and at the oppositeend with a driving element, second and third pinions `journalled in 5 saidsupport Vand having teeth meshing with the teeth of the main pinion, each of the second and third pinions having a driving element at one end thereof, fourth and fifth toothed pinions journalled in the `support at opposite sides of the 10 main pinion' and having driving elements at one end thereof, and a pair of idler pinions jour- Y nailed in the support and havingteeth meshing respectively with the teethof thev main pinion and the teeth of the fourth and fifth pinions, 15 Y f the axis of one of the idler pinionsbeing in a dierent plane than the axis of thesecond pinion,

Y' and the axis of the other idler pinion being in f of idler pinions journalled in the support and 20 having teeth meshing with the teeth of the main a different plane than the axis ,of the third pinion,-said planes being parallel .and positionedzo 'A at oppositesides of the axis of the main pinion, f J the second'and third pinions and the idler pinions being spaced circumferentially around said main WILLIAM L.; DrrGEs. u

Images