US972770A - Side frame for car-trucks. - Google Patents

Description

W. D. LOWRY.

SIDE FRAME POR GAR TRUCKS.

APPLIOATION Hmm JULY 16, 1910.

Patented Oct. 1l, 1910.

@wmp

z SHEETS-SHEET 1.

naamw W. D. LOWRY. SIDE FRAME FOR GAR TRUCKS. APPLICATION FILED JULY 1e, 1910.

2 sHEETssHBm 2.

m Aam.

Patented Oct. 11, 1910.

Y compression member.

I entren sie WILLIAM D. LOWRY, OF ST. LOUIS, MISSOURI.

SIBE FRAME FOR CAR-TRUCKS.

Specification of Letters Patent. ftgnted (bei). l, 1910.

Application led July 16, 1910. Serial No. 572,355.

To all whom it may concern.' I

Be it known that I, lViLLL/iir D. Lower, a citizen of the United States of America, residing in the city of St. Louis and State of h/lissouri, have invented certain new and useful Improvements in Side Frames for Car-Trucks, of which the following is a t'ull, clear, and exact description, reference being had to the accompanying drawings, forming part of this specilication.

My invention relates to a built up side frame for car trucks7 and has for its object the production ot' a very strong truck side frame of this hind which may be manufactured at a low cost.

In the preferred form of my invention the compression member of the truck frame is a single .steel casting adapted to receive the bolster and springs. As rolled beams of the commercial shapes possess high tensile strength and can be iiianutactured at a much lower cost per pound than steel castings, l prefeia bly employ a beam of this type as a tension member. rllhis truck frame constructed of a casting andl a rolled beam has many advantages over a truck frame coinposed of a single casting. It possesses maximum strength, the compression member is a very simple casting, and it is not liable to fracture during the processI ot' manufacture, as all ot' its parts are free to expand and contract without straining any other part of the casting. rlhe compression and tension members are combined together so as to produce a very strong structure, and the complete truck frame weighs considerably less than a truck frame composed ot' a single casting. y

Figure' is a side elevation of a wir truck .having a side trame embodyingl the 'features of my invention. Fig. II is in part a top plan view, and in part a horizontal section, of a portion. of thc truck shown in Fig. l. Fig. HI is a section taken on line lll-lll, Fig. lf. Fig. IV is a perspective view of the Fig, V is a perspective view of the tension member.

ln the accompanying drawings :H designates a tension member, preteral'ily in the forni ot a rolled channel beam having its flanges l upturned. The tension meml'ier has horizontal ends 2, which rest on ljournal boxes C, a middle horizontal portion El, and inclined intermediate portions 1l.

ldesignates the usual tic bar, connecting the journal boxes.

The compression member B is composed ot a single casting, provided with upturned flanges on its top face and having its ends arranged between the flanges at the ends of thc-tension member. The ends of the compression meinber B are preferably seated on thel web of the tension member. Bolts 6, which connect the journal boxes to the tie bar 5 also through the end portions of 65 the compression and tension members. The middle portion ot the compression member is provided with (.lepending columns 7, forming the side walls of a recess in the under side of the compression member.

The lower ends of the columns 7 are arranged between the flanges of the tension member and provided with arms 8 separated from each other and which support a spring seat 9. It will be read-ily perceived that due T5 to the columns l being se arated from each other at their lower en s, these columns may partake of any necessary expansion or contraction in casting the compression member and withoutresultant fracture of the col'un'iiis, or the part connecting them, which is extremely liable to occur in the production of side ,trames wherein the columns are integrally connected at their lower ends.

10 designates a bolster having the usual 85 guide lugs that engage the columns 7. Springs l1 are interposed between the bolster and the spring seat 9.

The side frames on opposite sides of the truck are connected together by angle bars 90 l2 that extend across the truck below the bolster. These angle bars 12 project beyond the truck frames, as shown in Fig. H, and receive the spring seats 9, which are preferably wooden blocks arranged between the vertical flanges of said angle ha rs.

13 are bolts passing through`A member A and the angle bars 1 arms 8, and tie bar 5, and connecting all ot' tension said parts together. The bolts 13 are espe- 100 cially important in connecting the spring seat supporting arms S of the bolster columns of the tension member A between the'lianges of which said ai ms are seated in that they serve toA prevent movement of the bolster columns and tension member relative to each other.

In thel usual type of built up truck frame,

wherein the ends et the conipression and tension members are located above the journal boxes, and connected together by bolts, the

latter receive very severe shearing strains in service, because the service shocks tend to 2. column neath said compression member, the tension slide the ends of the tension and compression members in opposite directions, and this movement must be resisted by the connecting 5 bolts. ln my improved truck trame, the bolts G are not subjected to such stresses, as the eonipression member has wings 14 provided with abutments 15 which engage the inclined portions ol' the tension members, and it will be readily seen that this construcy tion relieves the end portions ot the compression member ot' all compressive stresses. The abntments l5 are preferably secured to the tension members by rivets 1,6.

1. A truck frame, comprising a tension member having upwardly extending flanges, and a compression member above said tension member having columns seated between the flanges of said tension member.

2. A truck frame, comprising a compresv sion member having columns separated at their lower ends, and a tension. member bemember being provided with langes between which the lower ends ot said columns l are seated.

A truck trame, con'iprising. ay compression member having cohunns separated at their lower ends, a tension member beneath l said compression member, the tension member being provided with flanges bet-wceni which the lower ends et said columns are l seated, said columns being provided at their lower ends with arms for supporting a I spring seat.

l. A truck traine, comprising a compression member having columns 'separated at their lower ends, a tension member beneath y said compression member, the tension member being provided with flanges between g which the lower ends or said columns are seated, said columns being provided at their i lower ends with arms for supporting a l spring seat, and means for connecting said arms to said tension member.

5. A truck frame, comprising a. compres*- sion member having columns separated at their lower ends, a tension member beneath said compression member, the tension member being provided with flanges between which the lower ends of said columns are seated, said columns being provided at their lower ends with arms for supporting a spring seat` and bolts connecting said arms to said tension member. f

6. A truck `frame comprising a tension member having inclined intermediate portions, and a compression member having abntments engaging the inclined portions ot the tension member.

T. A .truck frame comprising a tension member having substantially horizontal end portions and inclined intermediate portions, and a compression member having inclined wingsA provided with abutments engaging the inclined portions el? the tension member.

S. A truck frame comprising a tension member having substantiallydiorizontal end portions and inclined intermediate portions,

a com pression member having inclined wings provided with abutments engaging the inclined portions of the tension member, and

i means for connecting said abutments to the I tension member.

9. A truck frame, comprising a compression member having a pair ot abutments, ay tension member having inclined portions which extend upwardly from the lower portion of the compression member and pass under said abutment, and means for connect- E ing the ends of the compression member to the tension member.

WTXLLIABTI D. LOWRY. in the presence ofi-- E. B. Linx, A. J. MOCAULEY,

Images