Патент USA US2404637код для вставки
2,4%37 L. B. .JONES GUSHIONING MEANS FOR DRAFT GEARS AND THE LIKE Original Filed Sept. 27, 1941 M. Ffa L \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\¥ ‘ INVENTOR; BY ,lí/agi ¿i Jo'iïeS, ,` »c ATTORNEÃ. f Patented July 23, 1946 ~ ,_ 2,404,637 NUNITED -STATES PATENT OFFICE 2,404,637 CUSHIONING MEANS FÜR DRAFT GEARS ` AND THE LIKE l . i Lloyd B. `iones, Hollidaysburg, Pa., assigner to The Pennsylvania Railroad Company, Philadelphia, Fa., a corporation of Pennsylvania» Original application September 27, 1941, Serial No. 412,615, now Patent No. 2,322,642, dated June 22, 1943. Divided and this application Merch 4, 1943, serian No. 477,948 3 Claims. 1 This invention relates to cushioning means use ful more particularly in connection with the draft gears of railway cars, the present application be ing a division of a copending application, Serial (ci. 213-49) ’ 2 . I 6, lil respectivelyY of the draft stop Castings I 3 and l ¿l generally in the same manner as the me tallic spring type buffer units heretofore ordinar ily employed. As shown, each cushioning unit I5 No. 412,615, ñled by me on September 27, 1941, Ui includes a multiplicity of rigid T-section pressure which application issued as Patent Number bars I8 of which the tongues have their opposite 2,322,642 on June 22, 1943. side faces roughened or corrugated as best seen My invention has for its chief aims to effec in Figs. 3` and 4, said bars being preferably of tively prevent the transmission of high-frequency metal and'arranged in pairs of opposing rows or Vibrations, originating in draft gears, to the car groups with the tongues of the bars of one group bodies, and to attain this objective with absence extending into clearance intervals between the of objectionable grating noises such as ordinarily head flanges of the bars of the other group. attend the operation of draft gears. Lodged between the tongues of adjacent reversely Another aim of my invention is to secure the positioned pressure bars I8 of the Opposing groups above advantages in a compact self-contained are smooth-surfaced plain section elongate‘resili cushioning unit which can be substituted in ent bars or slabs IS of rubber or the like, one standard draft gears in place of the usual types, of which latter is separately illustrated in per without necessitating any changes whatever in the construction of the draft gears or interfering with their normal mode of operation; and in which the shocks are absorbed by resilient ele ments of rubber or the like acting in compression as well as in shear when subjected to load. Thus, advantage is taken of the well known character istics of rubber which has superior work absorp tion qualities in shear as compared with pure compression. How the foregoing and other objects and im portant advantages can be readily realized in practice will appear from the following descrip tion of the attached drawing, wherein Fig. l is a fragmentary view in horizontal sec tion of a conventional railway car draft gear in which a pair of my improved cushioning units is incorporated. spective> in Fig. 5, said bars I9, having -their op posite longitudinal edges abutting the shoulders afforded by the head fianges of such adjacent pressure bars. From Fig. 1 it will be seen that a rigid separator plate 20, preferably of metal, is interposed between each row of opposing pressure bars I8 and associated resilient slabs I9 and that ' the whole pack is snugly enclosed in a tubular housing element 2l (Fig. 6) which is rectangular in cross section and aligned in the direction of draft. The casing member 2l is closed at the op.. posite ends by cover plates 22 and 23, which, like the separator plates 2Q, are capable of free move ment within said housing. The cushioning units l5 can be withdrawn downwardly, together with the draw bar I2, from between the draft stop cast ings l 3 and E4 upon removal of the usual retain 35 ing plate 25 which is bolted to the bottom flanges Fig. 2 is a cross section of the organization of the center sill channels I0 and II. As shown taken as indicated by the angled arrows II--II in each housing element 2l is disposed in an open Fig. 1. ing of the yoke bar I2 and has its protruding side Fig. 3 is a fragmentary detail view correspond portions fitting between the shoulders of opposite ing to Fig. 1 drawn to a larger scale. 40 recesses I6 in the stop castings I3. Figs. 4, 5 and 6 are perspective views of certain With the parts constructed and arranged as of the component parts of one of the cushioning described, it will be seen that as pull is induced units. in the draw bar I2, for example from the left in In Figs. 1 and 2 of these illustrations, the usual Fig. 1, the housing cover plates 23 of the two se laterally spaced side channels of the center sill of rially positioned cushioning units I5 will be a standard form of railway car are indicated at obliged to follow suit. This movement will be Ill and Il, the yoked draw bar of the draft gear yieldingly resisted through coaction of the oppos at I2, and the draft stop castings at I3 and Ill, ing pressure bars lll of the several layers -with the the latter being rigidly secured to the innerfaces respectively of said sill channels either by riveting or welding. respectively associated resilient slabs I9, and the shock progressively transmitted from one layer to the next in each unit through the medium of The cushioning units of my invention, each the separator plates 2li until it is ñnally absorbed. designated comprehensively by the reference character I 5 in Figs. 1 and 2, are proportioned to On the other hand, when the draw bar I2 is drawn to the right in Fig. 1, the movement will be fit into the transversely aligned pocket recesses gradually absorbed in* a like manner, through 2,404,637 3 initial movementl of the housing cover plates 22 of the two units, and communicated» progressively to the resilient slabs I9 in the several layers by the rigid bars I8 likewise through the medium of the separator plates 20. Due to enforced lat eral expansion incident to being compressed, the resilient slabs I9 are gripped bythe roughened 4 , . yoke opening in the draft bar; and resilient means comprising a plurality of compacted, com pressible and intervening rigid elements which r are separable both longitudinally and transverse ly of the center sill interposed between said end plates Within the housing to maintain said plates `yieldingly in engagement normally with the re side faces of the tongues of adjacent opposed ` spective stop shoulders of the respective pairs. 2. The invention according to claim 1, wherein rigid bars I8 in the several rows and placed in shear, the resistance offered varying proportion 10 V»tine resilient means includes groups of opposing ly-'arranged rigid pressure bars of T cross section ately to the degree of pressure imposed.V The having tongues with roughened side faces, the cushioning units I5 will thus operate silently in tongues of one group extending into clearance preventing the transmission to the car body of intervals between the head flanges of the bars sudden shocks and noises caused by spasmodicV of .the other group; and elongate slabs of rubber movements of the draft gear. » orthe like individually positioned between the -While I have herein shown the barsA I8 and YI9» tongues of adjacent pressure bars of the two as being vertically arranged, they may, if desired groups with their longitudinal edges overlapped or found more convenient in practice be horizon by the head flanges of the adjacent bars and with tally placed without sacrifice of any of the ad 20 their side faces contacting the contiguous side vantages hereinbefore pointed out. faces of the tengues of such adjacent bars. Having thus described my invention, I claim: 3. The invention according to claim 1, wherein 1; Cushioning means for use'in a draft gear the resilient means includes a transverse row of having a yoked draft bar and pairs of longitudi vertically-positioned opposingly-arranged groups nally spaced stop shoulders arranged along oppo of rigid pressure bars of T cross section having siteïsides of the draft bar in ñxed relation to the tongues with roughened sides, the tongues of one underframe of the car, said cushioning means group extending into clearance intervals between comprising a tubular housing element aligned in the head ñanges of the bars of the other group; the direction 0f draft and disposed within the yoke opening in the draft bar with the project ing side portions thereof fitting into the intervals between the respective pairs of stop shoulders and thereby held against movement in the assembly; cover plates slidable within and closing the oppo site ends -of the housing element and adapted to be abutted by the opposite end surfaces ofthe and elongate slabs of rubber or the like positioned 30 between the tongues of adjacent bars of the two groups with their longitudinal edges overlapped ' respectively by the head flanges of the adjacent bars and with their side faces contacting the con tiguous side faces of such bars. LLOYD B. JONES.