US1909460A

US1909460A - Truck side frame

Info

Publication number: US1909460A
Application number: US311801A
Authority: US
Inventors: Fritz B Ernst
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1928-10-11
Filing date: 1928-10-11
Publication date: 1933-05-16
Anticipated expiration: 1950-05-16

Description

y 6, 1933. F. B. ERNST TRUCK SIDE FRAME Filed Oct. 11, 1928 -strikes or rounds a curve.

especially sever if the spring plank connecting the two side frames is riveted Patented May 16, 1933 UNITED STATES PATENT OFFICE,

FRITZ B. ERNST, O1 CHICAGO,

OF CHICAGO ILLINOIS, A

ILLINOIS, ASSIGNOB TO STEEL FOUNDRIES,

CORPORATION OF NEW JERSEY TRUCK SIDE FRAME Application fled October 11, 1928. Serial 110. 811,801.

The side frame also receives a transverse load delivered in the nature of shocks or blows occasioned by the longitudinal shifting ofthe truck bolsters which delivers the shocks or blows to the side frame through the columns of the bolster and of the side frames.

The side' frame 'is also subjected to a twisting or torsional load when the car This load is securely thereto.

In cast or integral side frames in which all the various members of the frame are joined rigidly, the various direct loads which produce direct stresses also produce secondary or -induced stresses. At some points on the casting, the'secondary stresses are greater or more serious than the primary stresses. Some of the portions ofthe casting are subject to two primary stresses and in addition several secondary stresses. In

adding various stresses algebraically, it is found that at several points in the frame all the stresses which localize at these points happen to be plus or tension stresses with no corresponding minus or compression stresses to lower the average.

One object of the invention is to provide a truck si'le frame in which the stresses are more evenly distributed and balanced in the general type of side frame herein disclosed,

and whereby such side frame is materially strengthened at critical points without apprreciably increasing the weight of the ame. Another object is to provide an integrally formed truck side frame adapted to meet the various requirements under severe service conditions. I

These and other objects are. accomplished by means of the truck side frame disclosed by}; tll11e accompanying sheet of'drawing, in W 1C Figure 1 is a fragmentary side elevation of a truck side frame embodying my invention Figure 2 is a fragmentary bottom plan view of the same side frame;

Figure 3 is a sectional view taken in the plane of line 3-3 of Figure 1; and

Figure 4 is a. sectional'view ta-kenvin the 7 plane of line 44 of Figure 1.

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

Referring to the figures of the drawing, it will be noted that the side frame disclosed includes a compression member 10 which extends from one end of'the frame to the other and terminates in an integrally formed journal box 11. The tension member includes a horizontally extending portion 12-between the columns 13 and an inclined portion 14 extending upwardly and outwardly from the columns to a polnt of juncture with the compression member 10 .at the associated journal box 11.

Generally speaking, that portion 12 of the tension member between the columns 13 is box shaped in section, as shown in Figure 3, and that portion of the tension member 14 intermediate the columns and the journal boxes is channel shaped in section, as shown in Figure 4, with the web 15 being at the under side. I

The side frame is integrally formed, that is, the tension and compression members and columns 13 are cast in a single piece. In this particular instance, the joprnal boxes 1.1 are also cast integrally with the side rame.

The various stresses and strains set up in an integrally formed side frame are considered in detail in the Floyd Patent No. 1,364,491, and it will therefore unneces sary to describe in detail just what the stresses and strains are. It will be sufficient to state that the bending and tension stresses ordinarily would be greatest and excessive at the under side of the tension member portion 12 between the columns 13. and at the upper side of the tension member portions 14 directly outwardly from the columns, and also at the under side of the tension member directly inwardly from the journal boxes 11". In this particular instance, the stresses developed at either side of the columns are of particuar interest. The tension and compression members merge adjacent their ends and are provided with the journal boxes 11, brace members or gussets 15a being disposed to merge with the journal boxes and tension member in Substantial alignment with the lower web 15 of said tension member; Spaced gussets 15b are arranged in parallel relation to each other below said tension member and merge into said journal boxes and web 15 thus forming a rigid and strong construction.

In order to distribute the tension stresses in the tension member in a manner to reduce the bending stresses at the points mentioned, the web 15 of the tension member at a point outwardly from the columns is formed or branched into two webs, one being the main web 16 and the other being the auxiliary web 17. The main web 16 of the tension member may be considered to be a direct continuation of the web 15. The web 16 as it continues from the web 15 swings vertically downwardly and then curves into a horizontal position as the web portion 18 between the columns 13. The

' auxiliary web 17 at the point 19 branches from the main web 15 and extends diagonally downwardly throu h theassociated column 13 and emerges rom the inner side thereof and continues to extend downwardly and inwardly to form an angular portion 20 in the lower corners formed by the columns 13 and the tension member portion 12. Said web 17 tapers into the upper surface or spring seat portion 21 of the tension member 12 between the columns.

The triangular portion 20 referred to includes not only the web 17 but also vertical flanges 22 which connect the web 17 with the spring seat portion 21 and with the inner walls of the columns 13.

In this way, the various parts of the tension member and columns are tied together in a manner to properly distribute the tension stresses in the tension member and to reduce the bending stresses at the points mentioned.

By this arrangement, the objects of the invention are accomplished.

It is my intention to cover all modifications of the invention falling within the spirit and scope of the following claims.

I claim:

1. A truck side frame including tension and compression members and columns all cast in a single piece whereby and wherein bending stresses ordinarily would be greatest and excessive at points on either side of each of the columns, said tension member being channel shaped in section and having its web branch into two webs, one of which extends through the associated column and continues into the spring seat portion of the tension member between said columns to distribute the tension stresses in the tension member in a manner to reduce the bending stresses at the points mentioned.

2. A truck side frame including tension and compression members and columns all cast in a single piece whereby and wherein bending stresses ordinarily would be greatest and excessive at points on either side of each of the columns, said tension member being channel shaped in section and having its web branch into two webs, one of which extends through the associated column and tapers. into the spring seat portion of the tension member between said columns to distribute the tension stresses in the tension member in a manner to reduce the bending stresses at the points mentioned.

3. A truck side frame including tension and compression members and columns all cast in a single piece whereby and wherein bending stresses ordinarily would be greatest and excessive at points on either side of each of the columns, said tension member being channel shaped in section and having its web at the under side, said web branching into two webs, one of which extends through the associated column and continues into the spring seat portion of the tension member between said columns to distribute the tension stresses in the tension member in a manner to reduce the bending stresses at the points mentioned.

4. A truck side frame including tension and compression members and columns all cast in a single piece whereby and wherein bending stresses ordinarily would be greatest and excessive at points on either side of each of the columns, said tension member being channel shaped in section'and having its web at the lower side, said web branching into two webs, one of which extends diagonally through the associated column and tapers into the spring seat portion of the tension member to distribute the tension stresses in the tension member in a manner to reduce the bending stresses at the points mentioned.

5. A truck side frame including. tension and compression members and columns all cast in a single piece whereby and wherein bending stresses ordinarily would be greatest and excessive at points on either side of each of the columns, said tension member being channel shaped in section and having its web at the under side of said tension member,- said web branching into two webs, one of which extends from the under side of saidtension member from a point outwardly of" the associated column diagonally through said column and terminates in the upper side of thetension member between said columns to distribute the tension stresses in the tension member in a manner to reduce the bending stresses at the points mentioned.

6. In a side frame, the combination of a tension member having a web, a compres sion member and a column member, all.

integral, a spring seat member integral" with said tension and column members, said spring seat member having a web merging into said first named web at a point between said column member and the junction of said tension and compression members, said first named web intersecting said column member. 7

8. In a side frame, the combination of a tension member, a compression member and a column member, all cast integral, a spring seat member integral with said tension and column members, said tension member having a lower web member which intersects said column member and merges into said spring seat member.

,9. In a side frame, the combination of a tension member, a compression member and a column member, all cast integral, a spring seat member integral with said tension and column members and having a seat portion, said tension member having a Web having main and auxiliary portions, one of said portions intersecting said column member and merging into a part of said spring seat portion and another of said portions merging into a part of said spring seat member spaced from said seat portion. 10. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member,

said tension member having a lower web including a portion diagonally disposed in said opening and intersecting with a column and merging into said spring seat member.

11. A side frame comprising a member formed with a tension anda compression column and merging with the spring seatmember.

12. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compresssion member, said tension member having a lower Web including a portion diagonally disposed in said opening and terminating in said spring seat member.

13. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and con'ipressio'n member, said tension member having a web branching to provide main and auxiliary portions merging withsaid spring seat member, one of said portions lncludmg a part disposed .111

said opening.

14. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said tension member having a web branching to provide main and auxiliary portions substantially normal to one another and merging with said spring seat member, one of said portions including a part dlsposed in said openin 15. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said tension member having a eb branching to provide main and auxiliary portions merging with said spring seat member, one of said portions including a part diagonally disposed in said opening. 7

16. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including aspring seat member forming a bolster opening with said columns and compression member, said tension member'having a web branching to provide. main and auxiliary portions merging with said spring seat member, one of said portions intersecting a (011mm above the base of said column.

17. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming abolster opening with said columns and compression member, said tension member having a web branching to provide main and auxiliary portions merging with said spring seat member, one of said portions intersecting a column above the base of said column, and having a part diagonally disposed in said opening.

18. A side frame comprising a member formed with a tension and a compression member having (OlllIIlIlS therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said spring seat member including a spring seat portion, said tension member having a web branching to provide main and auxiliary portions, one of said portions including a part merging with and terminating in said spring seat portion in spaced relation with a column, and the other of said portions merging with said spring seat member and in spaced relation with said spring seat portion, said spring seat portion being below the plane of the first named portion.

19. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member .forming a bolster opening with said columns and compression member, said spring seat member including a spring. seat portion, said tension member having a web branching to provide main and auxiliary portions, one of said portions including a part merging with and terminating in said spring seat portion in spaced relation with.

a column, said part being diagonally disposed in said opening, and the other of said portions merging with said spring seat member and in spaced relation with said spring seat portion.

20. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said spring seat member including a spring seat portion, said tension member having a web branching to provide main and auxiliary portions, one of said portions intersecting a column and including a part diagonally disposed in said opening and merging in said spring seat portion, and the other of said portions merging with said spring seat member and in spaced relation with said spring seat portion.

21. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said spring seat member including a spring seat portion and lower webs, said tension member having a web branching to provide a main .and auxiliary portions, said main portion intersecting a column and having a part merging with said spring seat portion in spaced relation to said column, and said auxiliary portions merging with said lower webs.

22. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said spring seat member including a spring seat portion and lower webs, said tension member having a bottom web branching to provide a main and auxiliary portions, said main portion intersecting a column and having a part merging with said spring seat portion in spaced relation to said column, and said auxiliary portions merging with said lower webs.

23. A side frame comprising a member formed with a tension and acompression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said tension member having a lower web intersecting a column, and a member extending between said column and spring seat member.

24. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said tension and compression members merging into a portion provided with a journal box, said tension member having a web merging into a corner of said journal box and intersecting one of said columns above the base of said column and extending to and merging into said spring seat member, and a brace member disposed below said tension member and merglng into said journal box and tension member.

25. A side frame comprising a 'member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said tension and compression members merging into a portion provided with a journal box, one of said first named members having a web merging into a corner of said journal box and intersecting one of said columns above the base of said column and extending to and merging into said spring seat member, brace members disposed between said tension member and journal box and merging into said tension member and journal box in substantial alignment with said last named web, and spaced brace members disposed in parallel relation to each other and below said tension member and merging int? said journal box and said last named we 26. A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said tension and compression members merging into a portion provided with a journal box, one of said first named members having a lower web merging into a corner of said journal box and intersecting one of said columns above the base of said column and extending to and merging into said spring seat member.

27 A side frame comprising a member formed with a tension and a compression member having columns therebetween, said tension member including a spring seat member forming a bolster opening with said columns and compression member, said tension and compression members mer 'ng into a portion provided with a journal ox,.said

tension member havin a lower web merging into a corner of sai journal box and intersecting one of said columns above the base of said column and extending to and merging into said spring seat member.

28. A truck side frame including tension and compression members and columns all cast in a single piece whereby and wherein bending stresses ordinarily would be greatest and excessive at points on either side of 49 each of the columns, said-tension member having a web portion dividing adjacent said columns into web portions, one of said web portions extending through the associated column and continuing into the spring seat portion of the tension member and integral therewith to distribute the tension stresses in the tension member in a manner to reduce the bending stresses at the points mentioned. Si ed at Chicago, Illinois, this 4th day of 50 Octo er, 1928.

, FRITZ B. ERNST.