US1418294A - Six-wheel truck - Google Patents

Description

G. G. FLOYD.

SIX WHEEL TRUCK. 7 APPLICATION FILED JAN- 30. 1922.

1,418,294. PatentedJune 6, 1922.

2 SHEETS-SHEET l.

G. G. FLOYD.

SIX WHEEL TRUCK.

APPLICATION FILED JAN. 30. 1922.

Patented June 6, 1922,

2 SHEETS-SHEET 2.

llllll III GEOflGE G. FLOYD, OF CHICAGO, ILLINOIS, ASSIGNOR T0 'AIMERIGAN STEEL FOUNDBIES,

OF CHICAGO, TLLINOIS, A CORPORATION-OF NENV JERSEY.

SIX-WHEEL TRUCK.

To all whom 2'1 may concern:

Be it known that I, GEORGE. G. From), 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 Six-Wheel Trucks, of which the followingis a specification.

This invention relates to six-wheel railway car trucks.

It has been found in various types of six wheel car trucks that there is a tendency for the middle journal'box to tilt an amount which is permitted by the clearance between the journal box and the jaws. Such jaws have been formed integrally with the side frame, in which case it has been necessary 'to allow a certain amount of clearance to permit a free vertical ,movement of the middle pair of wheels. The tilting action has been due primarily to the fact that the inner ends of the equalizing levers which rest upon the intermediate journal box engage the latter six or eight inches above the center of the pivot points or the center of the journal and also have an eccentric bear ing relative to the center line, the resultant tendency being a tilting of the box. It is true that the jaws of the pedestal of the ordinary six-wheel truck prevent the box tilting excessively. However, the box does tip or lean over-an amount which the clearance permits. This tilting of the middle journal box has proved to be a serious prob 1cm in that the engaging portions of the journal box and pedestal jaws wear excessively thereby increasing the clearance and accor ingly increasing the tilting of the intermediate journal box. This results in the middle axle moving out of parallelism with the. other axles, which in turn results in wear of the flanges of the wheels and of the rails.

Accordingly, one object of the invention is to provide a sixwheel truck arrangement in which the intermediate journal boxes are )ositivel 1 held a ainst an tiltin action and i a r;

at the same time permitted to have-all necessary flexibility in the truck.

Another object is to provide a simple sixwheel truck arrangement wherein the intermediate journal boxes are guided in a manner to meet all the requirements for successful commercial operation.

These and other objects are accomplished by means of the arrangement disclosed on Specification of Letters Patent. Patented June 6, 1922,,

Application filed January 30, 1922. Serial No. 532,577.

the accompanying sheets of drawings, in which- Figure 1 is a fragmentary top plan view of a railway car truck embodying my invention; I

Figure 2 is a fragmentary side elevation of the same arrangement;

Figure 3 is a side elevation of a side frame of the six-wheel truck;

Figures 4L and 5 are side elevations of equalizing levers embodying my invention;

Figure 6 is a detail sectional View taken in the plane of line 66 of Figure 2; and

Figure 7 is a detail sectional view taken in the plane of line 77 of Figure 2.

The various novel features of the invention willbe apparent from the following description and drawings-and will be particularly pointed out in the appended claims.

Referring to the figures of the drawings, it Wlll be noted that my invention is disclosed in connection with a six-wheel railway car truck including an integrally formed side frame 10 having journal box openings 11 for the reception of end journal boxes 12, and also provided with openings 13 for the reception of end portions of bolster members 14. Equalizing levers 15 and 16 transmit a proper proportion of the load from the bolster members 14 to the intermediate journal boxes 17. Tn this particular instance the equalizing levers are in the form of trusses in that they have tension members 18 and 19 respectively, and compress/ ion members 20 and 21 respectivelv. These equalizing levers are made in the form of a truss for the purpose of securing suflicient strength in the case where vertical clearance space is limited. For example, when equalizing levers are in the form of single bent beams the section receiving the load from the bolsters must be of considerable depth. Such depth would not permit of the proper clearance, especially where springs are interposed between the bolster ends and the equalizing lever. However, by providing equalizing levers in the form of a truss the depth of the section of the tension member under the points of application of the bolster load may be greatly reduced to meet the clearance conditions. The outer end of the equalizing lever 15 is pivotally connected to the side frame 10 adjacent and inwardly from one of the end journal boxes 12 and between the side walls of the side frame tween.

by means of a pivot pin 22. Likewise, the associated equalizing lever 16 is pivoted to the side frame acent the other end journal box 12 on the same side of the truck by a pivot pin 23. j

As stated above, it has been found neeessary to provide some means for preventing any tilting of the intermediate journal boxes on a six-wheel truck. provided the inner end of the equalizing lever 15 with integrally "tor ied pedestal jaws 2d forming an opening for the in termediate journal be); 17. rigidly engag the intermediate journal box and in effect provide no clearance therebe- The eli'ect is the sai'ne as having the intermediate journal boxes "formed intogrally with the inner ends oi the equalizing levers 15. In this way the intermediate journal boxes are positively held against any tilting action, and at tne same time the intermediate axle is permitted to rise and tall with the pivotal action of the equalizing levers 15 as occasion demands due to track irregularities.

Referring particularly to Figure 6, it will be noted that the inner end oi the equalizing lever 15 is provided with side walls 26 torining a channel shaped pocket with a floor portion 27 tor the reception of the innerprojec ting end 28 of the associated equalizing lever 16. This projection 28 at the inner end of the equalizing lever 16 is provided with a wearing plate .49 which rests upon the bottom or web portion 27 oi the equalizing lever 15. The arrangement in eitect is telescopic and pressure resulting 'from the loads from the bolster members 14 is exerted upon the middle of the intermediate journal boxes. Also the equalizing levers 15 and 16 are held in proper relation with respect to each other as a result of their pivot connections at the outer ends and telescopic rangement at the inner ends. The upper parts orthe compression members 20 and 21 of the equalizing levers 1.5 and 16 respectively are located up between the side walls 30 of the side frame 10 thereby limiting the amount of relative lateral movement between such parts and at the same time facilitating vertical clearance conditions.

By means of this arrangement a six-wheel truck is provided adapted to meet thevarious requirements tor successful commercial operation. l

To this end I have lt'is my intention to cover all modifications oi? the invention falling. withinthe spirit and scope oi the following claims."

I claim:

1. In a six-wheel car truck, the combina-' box, and a plurality of equalizing levers operatively associated witli'said side -frame and engaging each other at said intermediate ournal box, one of said equalizing levers having an opening for receiving said intermediate journal box to prevent tilting o'fv the latter.

4-. In a six-wheel car truck, the combination of a side frame, an intermediate journal box, equalizing levers operatively associated with said side'lrame and having their inner ends telescopically arranged at said intermediate journal box, one of said equalizing levers having pedestal jaws for embracing said intermediate journal box'to prevent tilting of the latter; Y

5. In a six-wheel cartruck, the combination of a side "frame, an intermediate journal box, and an equalizing lever in the form of truss operatively connected to i said side frame and having an opening for receiving said journal box for preventing tilting of the latter.

6. In a six-wheel car truck, the combina: tion of a side frame, an intermediate journal box, a plurality of equalizing levers pivotally connected to said side frame, bolster members operatively associated with said equalizing levers through which loads are transmitted to said intermediate journal box, one of said equalizinglevers being pro vided with pedestal jaws it'or embracing said intermediate journal box "for preventing tilting of the latter.

Signed at Chicago, 0i January, 1922.

GEORGE G. FLQYD.

lllinois, this 24th day

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