US1379967A - Friction draft-gear - Google Patents

Description

R. l. COOK.

FRICTION DRAFT GEAR. APPLICATION FILED APR. 9, 1920.

Patented May 31, 1921.

3 SHEETSSHEET i Jlgwzfzntor I I f 00 4 M 120 R. .1. BOOK. FRICTlON DRAFT GEAR,

APPLICATION FILED APR 9, I920.

Patented May 31,1921.

3 SHEETS -SHEET 7% J72 z/anzfor/ 2663, I t J00074 5y yw/agb wgfl R. J. COOK.

FRICTION DRAFT GEAR.

APPLICATION HLED APR.9.1920.

Patented Maj31,1921.

3 SHEEN-SHEET 3.

In 7/6 71 for:

ROY J. COOK, OF CHIGAGO, ILLINOIS, ASSIGNOR TOG-FORGE C. MURRAY, OF CHICAGO .ATENT omen.

ILLINOIS. I

FRICTION DRAFT-GEAR.

Specification of Letters Patent. P t t May 31, 1 2

Application. filed April 9, 1920. Serial No. 3?2,460.

To all whom it may concern Be it known that I, ROY J. Coon, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Friction Draft-Gears, of which the following-is a specification.

This invention relates to frictional draft gear for use in connection with the drawbar mechanism of railway cars, and its purpose is to provide a device having an 1ncreased number and improved arrangement of the friction surfaces. The principal object of the invention is to provide a frictional draft gear in which the coacting friction blocks are arranged in a new and improved manner, so that the area of the contacting surfaces is greatly increased as compared with any of the frictional draft gears heretofore known. A further object is to provide a frictional draft gear comprising a pair of endcasings adapted'to be mounted within the yoke and having friction blocks mounted 'within these casings and connected by intermediate compressible mechanism. A'further feature of the invention is the provision of end casings which are connected by side wedge members adapted to have a sliding engagement with the side walls of the casings. Other objects relate to various features of construction and arrangement which will appear more fully hereinafter.

The nature of the invention will be understood from the following specification, taken with'the accompanying drawings, in which one embodiment is illustrated.

In the drawings Figure l'shows a top plan view of the invention with a part thereof illustrated in horizontal section on the line 1--1 of Fig. 2;

Fig. 2 shows a transverse sectional view on the line 2-2 of Fig. 1;

Fig. 3 shows a perspective view of one of the side wedge blocks;

Fig. 4 shows a side elevation of the draft gear yoke with the frictional draft gear mechanism illustrated in longitudinal section on the line 4.--4.- of Fig. 1;

*Fig. 5 shows a perspective view of one of the central. wedge blocks;

6 shows a perspective view of. one of the intermediate wedge blocks; and

Fig. 7 shows a perspective view of one of the end casings which are mounted within the yoke.

The invention is shown in connection with the usual longitudinal center sills 10 of a railway car. The usual draft lugs 11 are secured to these center sills by rivets 12 and are adapted to engage the draft mechanism, whichis mounted within the'yoke 13. This yoke comprises upper and lower walls 13 and 13 respectively, which are united at their rear ends by the rear wall 13 At the forward end of the yoke the upper and lowerwalls are secured to the butt 14; of a drawbar 1 1- by means of vertical pins or rivets 15. The yoke is supported on the center sills of the car by means of the transverse carrier plates 16, which are secured to the lower flanges of the sills by rivets 17, as shown in Fig. 2.

The frictional draft gear mechanism comprises two end casings 20, each of which comprises an upper wall 20, a lower wall 20, side walls 20 and an end wall 20 All of these walls are formed integrally and the casings are mounted within the yoke 13, with the end walls 20 adapted to abut against the end wall 13 of the yoke and the butt 14 of the drawbar. These casings project laterally beyond the yoke 13 and are adapted to coact with the draft lugs 11, as illustrated'in Fig. 1. The open ends of the casings 20 thus face toward each other and are spaced apart to permit rela tive endwise movement of the casings when the draft gear is compressed. casings are connected by sidefr'iction blocks or shoes 21, which have the form illustrated particularly in Fig. 3, where it willloe seen that each block comprises upper and lower walls 21 united by inclined end walls 21 and by vertically extending outer walls 21. The outer walls 21 are adapted to coast with the inner surfaces of the side walls 20 i of the casings 20. and the inclined end sun faces 2i are adapted to coact with the in clined surfaces 22 which are formed on the intermediate friction blocks 22. These blocks 22 are substantially triangular in cross-section and the surfaces 22 which. conaway along the edges thereof opposite the frictional surfaces 22, as shown at 22, thus providing clearance to permit the movement of the blocks 22 toward each other upon compression of the draft gear.

The central friction blocks 23 are provided with transverse walls 23 opposite the converging frictional surfaces 23 and these walls 23 are adapted to coact with the coil springs 24 which extend longitudinally of the d aft gear between the side friction blocks 21. Dowel pins 23 are formed on the walls 23" to engage the springs 24: and hold them in proper position.

Upon longitudinal movement of the draft gear yoke with respect to the draft lugs, one of the casings 20 will be moved longitudinally toward the other casing, which is held stationary by the lugs. This movement will cause a relative sliding of the friction shoes 21 with respect to the side walls of the casings 20, thus forcing the intermediate wedge blocks inwardly on the end walls of the casings. The inward movement of the intermediate wedge blocks will cause a movement of the central wedge bloc :s 23 longitudinally of the yoke, thereby compressing the springs 24. It will be seen that in this movement of the parts which compose the frictional draft gear there is a relative sliding of blocks over frictional surfaces which are comparatively large in extent, so that the compression of the draft gear is opposed by an extremely large frictional area in addition to the re sistance of the springs 24?. The arrangement of the friction blocks provides a compact construction having a large number of frictional surfaces.

Although I have shown and described one form of the invention for purposes of illustration, it will be understood that it may be constructed in various other ernbodiments without departing from the scope of the appended claims.

I claim:

1. The combination with a draft gear yoke of casings mounted in the opposite ends of said yoke and facing toward each other, friction shoes mounted within and extending between said casings, said friction shoes having surfaces coacting with the lateral walls of said casings, and intermediate compressible mechanism mounted between said friction-shoes and coacting with the end walls of said casings.

2. The combination with a draft gear yoke of a pair of casings mounted in opposite ends of the yoke and facing each other, said casings having vertically extending side walls and end walls, friction shoes extending longitudinally between said casings and coacting with the side walls thereof, said friction shoes having inclined inner surfaces, and intermediate mechanism comprising wedge blocks coacting with said inclined surfaces and with said end walls.

3. The combination with a draft gear yoke of a pair of casings mounted in opposite ends of said yoke and facing toward each other, said casings having upper and lower walls and side walls and end walls, friction shoes mounted between said upper and lower walls and coacting with said side walls, said friction shoes having inner end surfaces inclined away from said side walls at their ends, intermediate wedge blocks coacting with said inclined end surfaces and with said end walls, and connecting the oppositely disposed friction shoes, and compressible means extending longitudinally of said yoke between-the intermediate wedge blocks mounted within the oppositely disposed casings.

l. The combination with a draft gear yoke of a pair of casings mounted in opposite ends of said vokeand facing toward each other, said. casings comprising upper and lower walls and side walls extending parallel to the longitudinal axis of said yoke, friction shoes supported by said lower walls and having parts coacting with the inner surfaces of said side walls, said friction shoes having end surfaces inclined away from said side walls, intermediate wedge blocks mounted in each of said casings and coacting with said inclined end surfaces, said intermediate wedge blocks being supported by said lower walls, and intermediate compressible mechanism extending between the intermediate wedge blocks in the .opposite'casings.

The combination with a draft gear yoke of a pair of casings mounted in opposite ends of said yoke and facing toward each other, said casings comprising trans verse end walls and longitudinal side walls extending parallel to the longitudinal axis of said yoke, friction shoes having outer surfaces adapted to coact with the inner surfaces of said side walls, said friction shoes having inclined inner surfaces at their ends, and intermediate wedge blocks coacting with and adapted to travel on said inclined end surfaces and saidtransverse end walls of said casings.

G. The combination with a draft gear yoke of a pair of casings mounted in opposite ends of said yoke and facing toward each other, said casings comprising transverse end walls having horizontal upper and lower walls and vertical side walls extending longitudinally therefrom, friction shoes carried by said lower walls having outer surfaces coacting with the inner surfaces of said side walls, said friction shoes having inner end surfaces inclined away from said side walls, and intermediate wedge blocks substantially triangular in cross section supported by said lower walls and coacting with. said inclined end surfaces and with said end walls.

7. The combination with a draft gear yoke of a pair of casings mounted in opposite ends of said yoke and facing toward each other, said casings comprising trans verse end walls having horizontal upper and lower walls-and vertical side walls extending longitudinally therefrom, friction shoes carried by said lower walls having outer surfaces coacting with the inner surfaces of said side wall, said friction shoes having inner end surfaces inclined away from said side walls, intermediate wedge blocks substantially triangular in cross section coaeting with said inclined end surfaces and withthe inner surfaces of said transverse end walls within each of said casings, and springs extending longitudinally of said yoke and connecting the intermediate wedge blocks in opposite casings.

'8. The combination with a draft gear yoke of a pair of casingsmounted in opposite ends of said yoke and facing toward each other, said casings comprising transverse end walls having horizontal upper and lower walls and vertical side walls extending longitudinally therefrom, friction shoes carried by said lower walls having outer surfaces coacting with the inner surfaces of said sidewalls, said friction shoes having inner end surfaces inclined away from said side walls, a pair of intermediate wedge blocks of triangular cross section mounted in each of said casings, each of said intermediate wedge blocks having one wall coacting with said inclined end surfaces of said friction shoes and another wall coacting with the transverse end wall of one of said casings, the remaining walls of each pair of intermediate wedge blocks diverging toward the opposite end of saidyoke, central wedge blocks substantially triangular in cross section fitting between and coacting with said divergingesurfaces, and springs extending longitudinally of said yoke and connecting said central wedge blocks in the opposite casings.

In testimony whereof, I have subscribed my name.

ROY J. COOK.

Images