US2972967A

US2972967A - Snubbed truck

Info

Publication number: US2972967A
Application number: US689633A
Authority: US
Inventors: Fred E Bachman; Arthur F Baker; Robert B Cottrell
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1957-10-11
Filing date: 1957-10-11
Publication date: 1961-02-28
Anticipated expiration: 1978-02-28

Description

Feb. 28, 1961 BACHMAN ET AL 2,972,967

SNUBBED TRUCK 2 Sheets-Sheet 1 Filed 001;. 11, 1957 INVENTORS.

1961 F. E. BACHMAN ET AL 2,972,967

SNUBBED TRUCK 2 Sheets-Sheet 2 Filed Oct. 11, 1957 INVENTORS.

SNUBBED TRUCK Fred E. Bachman, St. Louis, Mo., and Arthur F. Baker,

Granite City, and Robert B. Cottrell, Belleville, 11]., assignors to American Steel Foundries, Chicago, Ill., a corporation of New Jersey Filed Oct. 11, 1957, Ser. No. 689,633

2 Claims. (Cl. 105-197) Our invention relates to railway car trucks, and more particularly, to a type of truck wherein friction absorbing means are associated with the truck bolster in such manner as to damp the oscillations of the bolster supporting spring group.

An object of our invention is to devise an improved form of such a truck wherein the load carrying member or bolster may be resiliently supported by spaced side frames and novel friction means may be supported by the bolster and which may engage the bolster and side frames so as to eliminate the use of bolster gibs.

A specific object is to provide an arrangement wherein the friction means or friction shoes extend into the columns of the side frames so that transverse movements of the bolster relative to the side frames are limited due to engagement of the friction shoes with the column walls of the side frames and with the end walls of the shoe pocket of the bolster.

A more specific object is to provide an arrangement wherein the lateral forces exerted on a truck side frame and a truck bolster are transmitted through the friction means or friction shoes rather than by direct contact of the side frame and bolster.

A further object is to provide a novel snubbing arrangement wherein the friction shoe casting extends out of a pocket of the bolster and which casting is received within a pocket presented by an adjacent side frame column.

A still further object is to provide a novel snubbing arrangement which utilizes a friction casting comprising a gib and which gib extends into an opening of the adjacent side frame so that frictional engagement between the casting and side frame is afforded by engagement of the sides of the gib with spaced friction surfaces of the side frame.

A still further object is to provide the truck of the class described with a friction casting wherein the side frame columns are disposed within a channel of the friction casting and frictional engagement is afforded by engagement of the friction surface of the columns with the friction surfaces of the channel.

The foregoing and other objects and advantages of the invention will become apparent from a consideration of the following specification and the accompanying drawings, wherein:

Figure 1 is a fragmentary top plan view of the preferred embodiment of the truck with portions thereof being broken away to more clearly illustrate the cooperation of parts thereof;

Figure 2 is a fragmentary side elevational view of the truck with one of the shoes, one of the side frame columns, and a portion of the bolster in section;

Figure 3 is a fragmentary plan view of the bolster showing a second embodiment of the invention, and

.Figure 4 is a fragmentary plan view of the bolster showing a third embodiment of the invention.

It should be noted that to achieve clarity, certain structural details have been omitted from various views where 2,972,967 latented Feb. 28, 1961 ice said details are believed to be adequately shown in other views.

Describing the invention in detail and referring first to Figures 1 and 2, the truck comprises a side frame 10 comprising a compression member 12 and a tension member 14 and spaced side frame columns 16 defining a central bolster opening 18 and windows 20 adjacent the ends of the frame 10 to be adapted for connection in the usual manner to associated wheel and axle assemblies (not shown).

A bolster, generally designated 22, preferably of onepiece cast construction, is conventionally supported within the bolster opening 18 by springs diagrammatically indicated at 24 and which springs are supported by a spring seat 26 at the bottom of the bolster opening 18.

As will be understood by those skilled in the art, the bolster 22 extends transversely of the truck and projects at each end thereof into the bolster opening 18 of the related side frame. In the drawings, only one end of the bolster is shown with the related side frame, and, consequently, 'only one snubbing means is shown as a corresponding structure at the opposite end of the bolster is preferably identical.

Each side of the bolster comprises a pocket 28 defined in part by inboard and

outboard webs

30 and 32, said webs being inwardly offset at 34 and 36, respectively, to define a narrowed inner portion of said pocket, the

offset portions

34 and 36 merging with a rear wall 38 extending substantially parallel to and longitudinally with the longitudinal vertical center plane of the bolster 22. Integrally formed with

webs

34 and 36 and rear wall 38 of each pocket 8 may be a top wall 40 of bolster 22 and a pair of downwardly extending spaced wedge walls 44, said downwardly spaced wedge walls having friction surfaces 45. The walls 44 project downwardly so that the lower ends thereof intersect the longitudinal center plane of the bolster 22. The lower ends of each of the walls 44 merge with a vertically upstanding web 46 which interconnects and may be integrally formed with walls 44 and a bottom wall 48 of bolster 22.

A pair of preferably identical friction shoes may be positioned within pockets 28. Each shoe is a casting of generally cup-like form having front and

rear walls

52 and 54, respectively, spaced inboard and

outboard walls

56 and 57, respectively, and an integral web 58 affording an internal spring seat as at 60.

Wall

56 and 57 may be inwardly offset at 61 and 63, respectively. The rear wall 54 may be disposed parallel to web 44 and may have a friction face 62 adapted to frictionally engage friction surface 45. The front wall 52 may be disposed parallel to the longitudinal vertical center plane of the bolster 22 and may be provided with a vertical friction face 64 adapted to frictionally engage a wear plate 65 conventionally secured to the adjacent side frame column 16, and the

walls

61 and 63 of the friction shoe 50 may be formed with vertical friction surfaces 66 for complementary engagement against associated

surfaces

34 and 36 of the pockets 28. The rear wall 54 of each shoe may be provided with an offset handle-like portion 68 and the

side Walls

34 and 36 of the pocket 28 may be cored away, as-at 7t), in alignment with the rear surface of the handle-like portion 68 in order to acc0mmodate the reception of an associated tool as hereinafter more fully described.

The bottom edge of the shoe 50 may have an opening 72 for reception of a shoe spring 74 which spring has its upper end seated against spring seat 60 and which may be seated at its lower end on a spring seat 76 of bolster 22.'

Outside of pocket 28 and within a pocket 80 of the adjacent side frame column 16 formed by a pair of inboard and

outboard gibs

82 and 84 secured in any convenient manner to the inboard and outboard sides, respectively, of the side frame column member 16. It may be seen, therefore, that friction face 64 of friction shoe may engage wear plate so as'to frictionally limit upward movement of the bolster 22 relative to the side frame 10. It may be also seen that inboard and

outboard sides

56 and 57 of friction shoe 50 may engage inboard and

outboard webs

30 and 32, respectively, of shoe 50 and also may engage the inboard and outboard gibs S2 and 84, respectively, of the side frame column member 16 so as to limit transverse movement of the bolster 22 relative to the side frame 10.

A tool (not shown) may be inserted through openings of

side walls

30 and 32 in engagement with the handlelilre portions 68 of the friction shoe 50 whereby said shoe may be drawn into the pockets 28 against the resistance of the spring 74 during assembly and disassembly of the bolster and side frame 16.

A modification of our novel friction shoe, bolster and side frame is shown in Figure 3 wherein the friction shoe, generally designated is disposed within pocket 28, said pocket 28 being preferably identical to the friction shoe pocket disclosed in Figures 1 and 2. As a result thereof, the portion of the friction shoe 9% disposed within pocket 28 of Figure 3 is similar to the portion of friction shoe 50 disposed within the pocket 28 of Figures 1 and 2. However, a front wall 92 of shoe 90 comprises a centrally disposed gib or lug 94 extending outside of the pocket 28 and into a pocket or channel 96 of a related side frame column member 97 and which gib 94- may engage inboardly and outboardly spaced side frame column Wear

plates

98 and 100, respectively, secured in the conventional manner to

surfaces

102 and 104, respectively, of the column 97.

A second modification or embodiment of our novel friction shoe, bolster and side frame is shown in Figure 4, wherein the construction of the arrangement is substantially similar to the arrangement disclosed in Figures 1 and 2 except for the fact that instead of the shoe of Figure 4 being disposed in a pocket of the side frame 10, side frame columns 112 of frame 10 may be disposed within a channel 114 of the related shoe 110 and which channel may be formed by

gibs

115 and 116 disposed at the inboard and outboard sides, respectively, of the related friction shoe. The friction surface 116 of the shoe 110 may engage a wear plate 118 secured to side frame column 112.

It is to be understood that we do not wish to be limited by the exact embodiments of the device shown which are merely by way ofillustration and not limitation as various and other forms of the device will, of course, be apparent to those skilled in the artwithout departing from the spirit of the invention or the scope of the claims.

We claim:

1. In a snubbed truck arrangement, the combination of: a side frame having a column presenting a vertical friction surface; a bolster resiliently supported on the side frame and having a pocket facing said side frame column and presenting in said pocket a wedge surface inclined toward the friction surface of said column; a one-piece friction shoe disposed within said pocket and presenting friction and Wedge faces disposed for engagement with the friction and Wedge surfaces of the side frame and bolster, respectively; resilient means to urge the shoe friction and wedge faces into engagement with the respective friction and wedge surfaces, said resilient means being carried in the bolster pocket for vertical movement therewith; means to prevent lateral movement of the shoe lengthwise of the bolster; and a pair of integral gibs projecting from the shoe toward opposite sides of the side frame column and serving as the only means of limiting longitudinal movement of the bolster relative to the side frame.

2. In a snubbed railway car truck arrangement, the combination of: a side frame memberhaving a vertical column presenting a friction surface; a bolster member having in a side thereof a pocket; a one-piece friction shoe carried in said pocket and having a friction wall presenting a friction face; spring means to urge said shoe face into engagement with said column surface, said spring means being carried in the bolster pocket for vertical movement therewith; means to restrict lateral movement of the shoe longitudinally of the bolster; and a pair of integral gibs projecting from the shoe friction wall on opposite sides of the side frame column and serving as thesole means of limiting longitudinal movement of the bolster transversely of the side frame.

Ramos Mar. 2, 1954 Maatman Feb. 22, 1955