US1872576A

US1872576A - Side frame

Info

Publication number: US1872576A
Application number: US474501A
Authority: US
Inventors: Merton H Hammett
Original assignee: Bettendorf Co
Current assignee: Bettendorf Co
Priority date: 1930-08-11
Filing date: 1930-08-11
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

Aug. 16, 1932. M. H. HAMMETT SIDE FRAME Filed Aug. 11. 1930 2 Sheets-S heet 1 ATTORNEY5.

Aug. 16, 193 M. H. HAMMETT SI'DE FRAME Filed Aug. 11. 1950 2 Sheets-Sheet 2 INVENTOR 777% WWW ATTORNEY5 Patented Aug. 16, 1932 UNITED STATES PATENT OFFICE MERTON n. HAMMETT, orimvnnronr, Iowa, ASSIGNOR 'ro THE. nrmrnnnonr com raw, or nnrrnnnonr, IOWA, A conrona'rron or IOWA SIDE FRAME Application filed August 14,1930. Serial 110.474,!501.

This invention relates to railway car trucks and more particularly to the constnuctlon the side frame therefor.

One of the objects (if the present invention is to provide a railway car truck sideframe of new and improved construction which W111 strengthen the spring supporting portion and minimize distortion or deflection thereof under heavy loads. a I

Another object is to'provide a car truck side frame with a tension web so-placed as to minimize deflection of the spring supporting portion and so positioned that no excessive mass of metal is formed to cause foundry trouble such as poor metal, shrmkage cracks, and difficulty in removing cores A further object is to provide a car trupk side frame with a reinforcing tensioumemher in the region of greatest strain 111 the application of heavy loads without materlally increasing the weight of the side frame.

A still further object is to provide a car truck side frame of improved construction having a diagonal tension web connectmgthe upper and lower webs of the spring supporting portion of the frame.

A further obj ect is to provide an improved car truck side frame having vertical struts between the top and bottom websof the spring supporting portion which in' conjunction with diagonal reinforcing webs form an in? verted queen post truss in the spring supporting portion of the side frame. With the above and other objects in view which will be apparent from the detailed description to follow, the present invention consists in certain features of construction and combinations of parts which will be readily apparent to those skilled in the art to which the invention appertains.

In the drawings which illustrate suitable embodiments of the present invention,

Figure 1 is a fragmentary side elevation of a railway car truck side frame, a portion of the spring supporting portion and tension chord being broken away to show the reinforcing web; 7

Fig; 2 is a bottom plan view of the side frame shown in Fig. 1; 1 i a f line 3-3. of Fig. 1;

Fig. 3 is a transverse section taken on the Fig. 4 is a transverse section taken on the line 4-4 of Fig. 1 showing the spring supporting portion and reinforcing web;

Fig. 5 is a fragmentary side elevation ofa modified type of side frame embodying diagonal tension members of inverted U-shape.

cross section Y Fig. '6 is a transverse section taken substantially on the line 6-6 of Fig. 5; I

Fig. 7 is a bottomplan view of the side frame shown in Fig. 5;

Fig. 8 is a fragmentary side .elevation of a further modified type of side frame embodying a tongue-shaped reinforcing web;

Fig. 9 is a bottom plan view of the side frame shown in Fig. 8;

Fig. 10 is a transverse section taken substantially on the line 10-10 of Fig. 8; and

Fig. 11 is a section taken substantially on the line 11-11 of Fig. 8.

Referring to the accompanying drawings in which like numerals refer" to like parts throughout the several views, the railway car truck is providedwith side frames, each of which is preferably in the form of a single Referring particularly to F igs. 1 to 4, in-

clusive, the compression chord A in section is of inverted channel shape and embodies spaced sides 1 and web '2, and in a similar manner the inclined portions O ofv the-tension chord are formed of spaced sides 3 and webs 4 to-fprovide a channel-shaped crosssection. The bolster columns I) are also channel-shapedil cross-section and each inlot 3 of the tension and compression chords respectively, and a web 6 extending transverse, ly of the side frame.

The central horizontal portion B of the tension chord is provided with spaced sides 7 integralwith the sides 3 of the inclined portion and with a bottom web 8. The horizontal portion B of the tension chord has a flat web 9 extending across the top thereof and spaced .from the lower web 8 and projecting laterally beyond tlie. upper sides 7 of the body ortion of the chord to form horizontal si e flanges 10 which provide a relatively wide spring supporting-portion immediately beneath the end of .the car bolster. Each flange 10 is suitably reinforced by spaced vertical webs 11 which connect the under side of the flanges with the sides 7 of the tension chord portion B. The

tween the bolster columns.

fiat web 9 extends from the base of one bolster column D to the base of the other bolster column so that a relatively wide flat spring supporting portion is provided he The provision of a relatively lon horizontal spring-supporting portion in t e tension chord tends to weaken the tension chord since the load imposed by the supporting springs tends to cause the tension chord to assume the shape which would be assumed by a flexible tension member supported at the ends of the compression'chord and subjected to a similar load.

In carrying out my invention, I have provided spaced vertical struts 12 between the sides 7 of the central tension chord portion B which extends from the lower transverse web 8 to the upper web9 forming the spring supporting portion. As shown in Figs. 1 to 4, inclusive, the web 1 of the inclined chord portions C is formed with a triangular recess 13 directly below 'the bolster coluinn D which forms flanged portions 14 integral with the 5 web 4 and diverging towardthe lower horizontal web 8 of the central portion B and which merge into the web 8 substantially in the region of the vertical strut 12. The up per marginal edges of each inclined portion C of the tension chord are formed with inwardly extending flanges 15a which extend downwardly toward the web 6 of the bolster column D and merge into a web portion 15 lying outwardly of the web 6-. Each web '15 extends downwardly at an ,angleand mer es into the connection between the upper horizontal web 9 and the vertical bolster column web 6. As shown in Fig. 1, I have rovideda web 16 inte ral with and extendmg between the sides the lower horizontal web 8 of the central portion B below the upper web 9 and substantially at the connections between the vertical struts 12 andthe lower web 8, and which extends upwardly merging into the which merges into I eludes sides 5 integral with the sides 1 andweb 15 and preferably at the same angle as the web 15 in the reglon of the connections of web 9 and column D.

If desired, the web 16 below the upper horizontal web 9 may be centrally recessed at 16a as shown directly below the web 9, thus providing spaced leg portions joining in with the horizontal web 9, and furthermore, if desired, the vertical web 6 of each bolster column D may be centrally recessed at 17, providing side truss portions which merge into the web 15 and 'into the upper horizontal web 9. I

It will thus be seen that I have provided a tension chord comprising the central portion B and inclined portions 0 with reinforcing webs 16 which extend upwardly at an angle from the lower horizontal web 8 and vertical struts 12 and merge into the connections between the upper horizontal web 9 and the vertical bolster columns D.

It will be further seen that I have provided the tension chord with a web portion 4 which terminates in flaing'es is that extend downwardly to a horizontal portion and then merge into the bottom Web 8 substantially at the sides 7 in the region of the integral connections between the vertical reinforcing struts 12, lower horizontal web 8 and reinforcing web 16.

The reinforcing web 16 thus provides an addedtension member for the tension chord comprising the portions B and C which is so placed that it is necessary for it to elongate before any deflection ofthe spring supporting portion can occur. In other words, the

spring supporting portion is provided with vertical reinforcing struts 12 which connect the upper spring-supporting portion web 9 with the -lower web 8 and wlth inclined web portions 16 which connect from the intersection of the strut 12 with the web 8 and extend to th end of the upper webs 9 which are joine into the webs ,6 of the bolster columns D. This in efi'ect provides a bridge truss action which, in combination with the flanged portions 14 of the webs 4 that connect into the horizontal web 8, provides an added reinforcing means arranged inthe region where the greatest strain comes in the application of heavy loads without materially afi'ecting the weight of the side frame.

The load carried on, he spring supporting portion is transmitted into theinclined remforcing web 16 at the flange portions 14 so that greatly added strength is supplied at the reg ons where the greatest distortion would otherwise occur, thereby minimizing distortion and deflection of the spring suporting portion and strengthening the side ra'me at this point. In this truss action, the web 9 and vertical struts 12 are placed in compression and the lower web 8 and inclined webs 16 are placed in tension, thus as above described providing a well reinforced tension zportion of the tension chord.

flanges 21 which are formed at the lower p chord which prevents substantial distortion and deflection of the spring supportin portion under the applicatlon of heavy loa s.

It has been found by forming the

apertures

13, 16a and 17 in the

webs

4, 16 and 6, respectively, that the weight thus reduced does not impair strength and greatly facilitates man ufacture by reducing cooling strains, and these greatly add to the ease with which the cores used in the casting operation can be removeda In Figs. 5, 6 and 7 I have shown a modified construction of the side frames previously described. In this construction the lower edges of the sides 20 of each inclined portion of the tension chord are formed with inwardly extending flanges 21 and the upper edges of the sides 20 are connected by a solid web 22 which extends downwardly and merges into the web 24 of the central spring su porting edges of the inclined portions of the tension chord extend downwardly and merge into the. lower web 25 of the spring supporting portion substantially at the connection of the vertical struts 26 therewith which extend from the lower web 25 to the upper web 24 substantially as shown in Flg. 5. The

flanges 21 are also inter-connected outwardly of the lower web 25 by a narrow transversely extending web 27 as shown in Fig. 7, and the side flanges 21 below the connecting. web 27 diverge toward the lower web 25 of the spring supporting portion and merge into the same substantially at. the sides 28 thereof.

As in the construction previously de'- scribed, a web 29 is provided to extend downwardly preferably at the same angle as the web 22 from the connection of the bolster column web 23 and upper web.24 of the spring supporting portion and merges into the lower web 25 of the spring supporting portion substantially at the connection of the vertical strut 26 with the lower web 25, thereby providing a suitable reinforcing web which serves as an added tension member extending between the connection of the web 23 with the werT24 and the connection of the web 25 with the vertical strut 26. The web 29 is also recessed at 29a to provide means for removing the cores used during casting and for decreasing the weight of the 7. car truck side frame.

The action of the reinforcing web 29 is the same as the corresponding reinforcing web of the construction previously described. The load carried on the spring supporting porti n is transmitted to the inclined reinforcing web 29. The reinforcing web 29 thus provides gre atly added strength at the region where the greatest distortions would otherwise occur, thereby minimizing such -distortion and deflection of the spring suphe side of the inclined portions of the tension chord are interconnected at their upper edges by a solid, web member 31 and the lower edges.

further modified construction of side frame in Figs. 8 to 11, in elusive, and. in this construction the sides 30- thereof are'providedwith flanges 32 which merge into a narrow transversely extending bridging web portion 35 in the region of the bolster columns, and then diverge outwardly in flanges 32a which extend downwardly to a horizontal position and 'then. merge into the lower web 33 of the central portion of the tension chord. These flan e portions 32a merge into the lower Web 33 S11 stantially in the region of the connection of the vertical struts 34 with the lower web If desired, the bridging web portion 35 shown in Figs. 8 and 9 and the bridging web ortion 27 in Figs. 5 and 7 may be omitted. The web 31 connecting the sides 30 of-the inclined portions of the tension chord merges into the upper web 38 of the spring-supporting portion. A web 36 which is preferably inclined at the same angle as the web 31 merges into the lower web 33 of the central portion of the tension chord substantially at the region where the vertical strut 34 connects in o the web 33, and also merges in the region of connection of the upper web 38 and web 31. As shown in Figs. 9 and 11, this web 36 is spaced from the sides 37 of the central portion of the tension chord.

As in the construction previously described, the combination of.the upper and lower webs 38- and 33,.the web 36 and web 31, and the vertical strut 34, provides an arrangement at each end of the spring supportin portion wherein a truss action occurs, the we 36 and the lower web 33 then becoming tension members and the upper web 38 and the vertical strut 34 then becoming compression members. These members act in such a manner that when loads are transmitted to the spring supporting portions it is necessary for the webs 36 to elongate before any appreciable distortion or depression of the spring supporting'portion can occur, thus providing reinforcing means to minimize distortion arid deflection of the spring supporting portions.

In each of the constructions described, it will benoted that I have provided a car truck side frame with a reinforcing tension member that connects with the corner formed by the bolster column and upper web of the spring supporting portion and with the lower web of the central'portion of the tension chord which is subject to the greatest deflection during the application of heavy loads on the spring supporting portion. In these constructions the upper and lower webs of the central portion of the tension chord, the

vertical strut members and the inclined webs construction may be altered or omitted withextending from the connection of the struts with the lower web to the connections between the upper web and bolster columnwebs, provide a reinforcing truss which acts in such a manner during the application of heavy loads to the spring supporting portion that it is necessary for the inclined webs to elongate when a load is exerted on the spring supporting portion and before any appreciable deflection or distortion of the spring supporting portion can take place. This construction, in combination with the lower web or flanges of the inclined portions'of the tension chord provides a truss arrangement which adds considerable strength to the side frames without increasing the weight there- In the side frame structures shown and described, it will be observed that the reinforcing webs for the tension chords and the tension chords are so constructed as to permit the spring supporting portion, bolster webs and reinforcing webs to merge Withouuforming excessive metal at the point of merger and yet give the necessary strength. This is a veryadvantageous feature in that it eliminates foundry trouble and provides for fine grain, satisfactory metal which is free from shrink pockets, pipes and shrinkage cracks.

, It is to be further noted that even with the addition of the inclined reinforcing webs extending between the bolster columns and the lower web of the central portion of the tension chord, means is provided therein wherein the sand cores can be readily removed after the casting operation.

It is to be further noted that in some of the constructions previously described, the.

tral portion of the tension chord and are formed with a recess therebetween. Also, in some of these constructions the sides of the inclined portions of the tension web are formed with a solid web connecting the lower edges thereof with the upper edges thereof having inwardly extending flanges, whereas in other constructions the upper ed es of the inclined portions of the tension 0 0rd are formed with a solid web and the lower edges of the sides thereof are formed with inwardly extending flanges. However, in all of these constructions, the truss action provided by the addition of the inclined web extending between theconnections between the upper web and the bolster coluinn webs and the-lower web of the central portion of the tension chord, is the same.

Aside from the specific embodiments of the invention herein shown and described it will be understood that numerous details of the out departing from the spirit and scope of the invention, and I do not desire to limit the invention to the exact constructions shown, as I desire to claim the invention broadly, as well as specifically, as indicated in the appended claims.

What I claim is:

1. A car truck side frame comprising a compression chord, a tension chord, and spaced bolster columns extending vertically between said compression and tension chords, said tension chord having a central horizontal spring supportingportion including spaced sides, an upper web joined at its ends with said bolster columns and at its sides with said spaced sides, a lower web joined at its sides with said spaced sides, and inclined webs integral with and extending from said lower web and joining with said upper web in the region of the connections of said upper web with said bolster columns, said inclined spaced sides.

2. A car truck side frame comprising a compression chord, a tension chord, 'and spaced bolster columns extending vertically between said-compression and tension chords, said tension chord having a central'horizontal spring supporting portion including spaced sides, upper and lower webs, .said upper web being joined at its ends with, said bolster columns, spaced vertical struts spaced from said sides and extending between said upper and lowerwebs, and inclined webs, each inclined web being joined at one end with said lower web in the region of connection of a strut therewith and at the other end with said upper web substantially in the regiop1 of connection of a bolster column therewit 3. A car'truck side framecomprising a compression chord, a tension chord, and spaced bolster coiumns extending vertically between said compression and tension chords, said tension chord having a centralhorizontal spring supporting portion including spaced sides, upper and'lower webs, said upper'web being joined at its ends with said bolster columns, spaced vertical struts spaced from said sides and extending between said upper and, lower 'webs, and inclined webs, each inclined web being joined at one end with said lower web in the region of connection of a strut therewith and at the other end with said upper web substantially in the respaced sides, upper and lower webs, said upper web being joined at its ends with said bolster columns, spaced vertical struts spaced from said sides and extending between said upper and lower webs, and inclined webs, each inclined web being joined at one end with said lower web in the region of connection of a. strut therewith and at the other end with said upper web substantially in the region of connection of a bolster column therewith, said inclined webs being spaced at their sides from said spaced sides.

5. A single piece car truck side frame comprising a compression chord, a tension chord and spaced vertical bolster columns joining said chords, said tension chord having inclined portions including spaced sides and webs interconnecting the upper edges of said sides and being joined with said bolster columns, and a central horizontal portion including upper and lower webs, the upper Web being joined at its ends with said bolster columns and webs of said inclined portions, and inclined webs each being oined with said lower web and with said upper web in the region of connection. of said bolster columns and webs of said inclined portions therewith.

6. A single piece car truck side frame comprising a compression chord, a tension chord and spaced vertical bolster columns joining said chords, said tension, chords having inclined portions including spaced sides, in- Wardly extending flanges at the lower edges of said sides, and webs interconnecting the upper edges of said sides and being joined with said bolster columns, and a central horizontal portion including upper and lower webs, the upper web being joined at its ends with said bolster columns and webs of said inclined portions, and the lower web being joined at its ends with said flanges of said inclined portions, and inclined webs each being joined with said lower web in the region of connection of said flanges therewith and with said upper web in the region of connection of said bolster columns and webs of said inclined portions therewith.

inclined portions, and the lower web being joined at its ends with said flanges of said inclined portions, and inclined webs each being joined with said lower web in the region of connection of said flanges therewith and with said upper web in the region of connecprising a compression chord, a tension chord and spaced vertical bolster columns joining said chords, said tension chord having inclined portions including spaced sides, inwardly extending flanges at the lower edges of said sides, and webs interconnecting the upper edges of said sides and being joined with said bolster columns, and a central horizontal portion including upper and lower webs, the upper web being joined at its ends with said bolster columns and webs of said inclined portions, and the lower web being joined at its ends with said flanges of said inclined portions, and inclined webs each be ing joined with said lower web in the region of connection of said flanges therewith and with said upper web in the region of connection of said bolster columns and webs of said inclined portions therewith, said horizontal portion having vertical struts extending between said upper and lower webs and joined with said lower web in the region of connection of saidinclined webs therewith, and spaced sides integral with said upper and lower webs and the sides of said inclined portions.

-9. A single piece car truck side frame comprising a compression chord, a tension chord and spaced vertical bolster columns joining said chords, said tension chord having inclined portions including spaced sides, inwardly extending flanges at the lower edges of said sides, and webs interconnecting the upper edges of said sides and being joined with said bolster columns, and a central horizontal portion including upper and lower webs, the upper web being joined at its ends with said bolster columns and webs of said inclined-portions, and the lower web'being joined at its ends with said flanges of said inclined portions, and inclined webs each be-' ing joined with said lower web in the region of connection of said flanges therewith and with said upper web in the region of connection of said bolster columns and webs of said inclined portions therewith, said horizontal portion having vertical struts extending between said upper and lower webs and joined with said lower web in the region of connection of said inclined webs therewith, and spaced sides integral with said upper and lower webs and the sides of said inclined portions, said inclined webs being spaced from said spaced sides of said horizontal portion.

In testimony whereof I aifix my signature.

MERTON H. HAMMETT.