US3342139A

US3342139A - Snubbed bolster truck

Info

Publication number: US3342139A
Application number: US429585A
Authority: US
Inventors: Tack Carl Edward
Original assignee: Amsted Industries Inc
Current assignee: Amsted Industries Inc
Priority date: 1965-02-01
Filing date: 1965-02-01
Publication date: 1967-09-19
Anticipated expiration: 1984-09-19

Description

Sept. 19, 1967 c T 3,342,139

SNUBBED BOLSTER TRUCK Filed Feb. 1, 1965 2 Sheets-Sheet 2 v Carf @w j 50W I Patented Sept. 19, 1967 3,342,139 SNUBBED BOLSTER TRUCK Carl Edward Tack, Elmhurst, Ill., assignor t Amsted Industries Incorporated, Chicago, 11]., a corporation of New Jersey Filed Feb. 1, 1965, Ser. No. 429,585 2 Claims. (Cl. 105--197) ABSTRACT OF THE DISCLOSURE A railway car truck comprises a friction shoe pocket defined by a back bolster wall, a bottom bolster wall, and a bolster wedge wall extending upwardly from the back wall and diverging therefrom. The wedge wall at its juncture with the back wall defines a recess. A wear plate of spring metal comprises a loop portion sprung into the recess, with the lower end of said loop portion bearing against an abutment shoulder on the bottom wall facing the back wall. The upper end of the spring plate is welded along the back side thereof to the upper end of the wedge wall.

This invention relates to railway car trucks and more particularly to truck provided with means to dampen vertical movements of a bolster relative to the side frames.

Briefly, the present invention contemplates the provision of a snubbed bolster truck embodying a friction shoe having a flat front face engaging a vertical side frame column and spaced inclined surfaces engaging sloping wedge walls on the bolster, the shoe being urged between the column and sloping wedge walls by a compression spring to frictionally dampen vertical movements of the bolster. During replacement of worn friction shoes, it was also sometimes necessary to repair worn sloping wedge walls on the bolster.

An object of the present invention resides in the provision of a bolster provided with wear plates overlying the sloping wedge walls for engagement by the friction shoes, to thereby prevent wear of the wedge walls.

Another object of the invention resides in the provision of means for detachably mounting the wear plates on a bolster to facilitate replacement of worn wear plates.

A further object of the invention resides in the provision of a wear plate formed of hardened flat strip spring steel to prolong the service life of the wear plate.

The invention embodies other novel features, details of construction and arrangement of parts which are hereinafter set forth in the specification and claims and illustrated in the accompanying drawings, forming part thereof, wherein:

FIGURE 1 is a side elevation showing a snubbed railway car truck embodying features of the invention.

FIGURE 2 is a fragmentary top plan view showing a friction shoe as mounted within a pocket in the bolster for frictional engagement against a side frame column.

FIGURE 3 is an end elevation of the structure shown in FIGURE 2.

FIGURE 4 is a fragmentary transverse section illustrating a wear plate overlying a wedge wall within a friction shoe pocket in the bolster.

FIGURE 5 is a fragmentary front elevation of the structure shown in FIGURE 4.

Referring now to the drawings for a better understanding of the invention, the snubbed railway car truck is shown as comprising spaced truss type side frames 2 supported at their ends upon wheel and axle assemblies 3 and having tension and compression members 4 and 6 interconnected by spaced vertical columns 7 to define windows 8. The side frames are connected by a bolster 9 having its ends projecting through the windows and resiliently supported upon spring groups 11 seated on the tension members 4.

The bolster 9 is provided with pockets 12 adapted to receive friction shoes 13 for frictional engagement against the side frame columns 7. Each pocket is defined by a back wall 14, a bottom 16, and spaced end walls 17. Wedge walls 18 on the end walls slope upwardly from the back wall toward a column 7, the lower end of each wedge wall defining with the back wall 14 and bottom 16 a recess 19 to receive the loop end 21 of a wear plate '22.

The wear plate 22 is formed from a length of strip spring metal and then hardened to provide a hard wear surface for engagement by a friction shoe, the plate having a straight shank 23 merging with a resilient loop portion 21 adapted to be sprung into the recess 19 with its end in abutting engagement against a shoulder 24 in the bottom 16. The upper end of the shank 23 is tack welded at 26 to the upper end of the wedge wall 18.

The friction shoe 13 is provided with a fiat vertical front face 27 engaging a column 7 and having spaced inclined surfaces 28 engaging the wear plates 22, the shoe being urged upwardly between the column and wear plates by a compression pring 29.

I claim:

1. In a railway car truck having spaced side frames interconnected by a bolster, said bolster being resiliently supported at its end upon the side frames for vertical movement relative thereto, said bolster having a friction shoe pocket defined by a bottom bolster wall, a back bolster wall, and a bolster wedge wall diverging upwardly from the back wall, said bottom, back and wedge walls defining a recess at the bottom of the wedge wall, a wear plate of hardened spring metal having a shank engaging a wedge wall and a loop portion sprung into said recess with said loop portion engaged at its lower edge against an abutment shoulder on the bottom wall, said shoulder facing the back wall, the upper end of said wear plate being tack welded to said wedge wall, a friction shoe engaging the plate and the side frame, and actuating means for the shoe.

2. In a railway car truck having spaced side frames interconnected by a bolster, said bolster being resiliently supported at its ends upon the side frames for vertical movement between spaced vertical columns, said bolster having friction shoe pockets provided with a bottom wall, a back wall, and spaced substantially coplanar wedge walls diverging upwardly from the back wall, said bottom, back and wedge walls defining recesses, wear plates of hardened spring metal each having a shank engaging a related wedge wall and a loop portion sprung into a related recess with its lower end engaged against an abutment shoulder on the bottom wall, said shoulder facing the back wall, the upper end of each wear plate being tack welded to its wedge wall, a friction shoe in each pocket and having a front surface engaging a column and inclined surfaces engaging the wear plates, and a compression spring urging its shoe against the column and wear plates.

References Cited UNITED STATES PATENTS 2,257,109 9/1941 Davidson -197 2,485,104 10/1949 Maatman 105-197 2,485,970 10/1949 Lehrman 105-197 2,578,480 12/1951 Lehrman 105-l97 2,597,909 5/1952 Tack 105197 2,672,102 3/1954 Davidson 105-197 2,777,400 1/1957 Forssell l05197 ARTHUR L. LA POINT, Primary Examiner. H. BELT RAN, Assistant Examiner.

Claims

1. IN A RAILWAY CAR TRUCK HAVING SPACED SIDE FRAMES INTERCONNECTED BY A BOLSTER, BEING RESILIENTLY SUPPORTED AT ITS END UPON THE SIDE FRAMES FR VERTICAL MOVEMENT RELATIVE THERETO, SAID BOLSTER HAVING A FRICTION SHOE POCKET DEFINED BY A BOTTOM BOLSTER WALL, A BACK BOLSTER WALL, AND A BOLSTER WEDGE WALL DIVERGING UPWARDLY FROM THE BACK WALL, SAID BOTTOM OF THE WEDGE WALLS DEFINING A RECESS AT THE BOTTOM OF THE WEDGE WALL, A WEAR PLATE OF HARDENED SPRING METAL HAVING A SHANK ENGAGING A WEDGE WALL AND A LOOP PORTION HAVING A SHANK ENGAGING WITH SAID LOOP PORTION ENGAGED AT ITS LOWER EDGE AGAINST AN ABUTMENT SHOULDER ON THE BOTTOM WALL, SAID SHOULDER FACING THE BACK WALL, THE UPPER END OF SAID WEAR PLATE BEING TACK WELDED TO SAID WEDGE WALL, A FRICTION SHOE ENGAGING THE PLATE AND THE SIDE FRAME, AND ACTUATING MEANS FOR THE SHOE.