US2263759A

US2263759A - Spring plankless truck

Info

Publication number: US2263759A
Application number: US311509A
Authority: US
Inventors: Robert B Cottrell
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1939-12-29
Filing date: 1939-12-29
Publication date: 1941-11-25
Anticipated expiration: 1958-11-25

Description

NW. 25, 11941- R. B. co'r'rRELL SPRING PLANKLESS TRUCK Filed Dec. 29, 1939 2 sheets-sheet 1 INVENTOR. fnbef bi-rel ATTORNEY.

Nav. 25, 1941. R. a. coT'rRELL 2,263,759

SPRING `PLAlmLEss TRUCK' Filed Dec. 29, 1939 2 sheets-sheet 2 INVENTOR. Robe/*ZL B. @ZZ/yall,

Patented Nov. 25, 1941 SPRING PLANKLESS TRUCK Robert B. Cottrell, Chicago, Ill., assignor to American Steel Foundries, Chicago, Ill., a corporation of New Jersey Application December 29,1939, Serial No. 311,509

8 Claims.

My invention relates to four wheel railway car trucks and more particularly to such trucks of socal1ed quick Wheel change type wherein the `bolster and side frame are so connected as to facilitate their assembly or dismantling without disturbing the associated spring group.

An object of my invention is to devise an improvement in the modification of the quick wheel change truckv shown in my United States Letters Patent No. 2,188,641, issued January 30, 1940 and entitled Spring plankless truck. In the said patent I have shown an arrangement wherein a single insert is used at each end of the bolster forming a means of connection between the bolster and the associated side frames. In the arrangement shown in my said patent a portion of the bolster co-acts with the guide -columns on the side frame and additional guide surface is afforded by means of the insert. Under certain conditions it is desirable for the engaging guide surfaces to be located only on the side frame and one additional member, either the bolster or the insert. To accommodate such conditions I have devised the improvement shown herein and the said improvement includes certain other features more clearly set forth in the accompanying drawings and specification.

A different object of my invention is to design a novel form of insert member serving as a means of connection between a bolster and an associated side frame, said insert member being formed in a plurality of interlocking parts to facilitate assembly and dismantling.

Figure 3 is a sectional view taken through the y truck structure shown in Figures 1 and 2, the section being taken substantially in the transverse plane indicated byr the line 3-3 of Figure 1.

Figure 4 is a top plan view of my novel insert member, Figure 4A being a side elevation thereof and Figure 4B an end view taken from the right as seen in Figures 4 and 4A.

Fig-ure 5 is a fragmentary top plan View of a modified form of one end of the insert structure and Figures 5A and 5B are end views and side elevations thereof respectively.

Figure 6 is an end elevation of a further mode iii-cation of the bolster and insert structure and Figure 6A is a sectional View therethrough, taken against the side Wall of the bolster.

substantially in the plane indicated by the line A-A of Figure 6.

Figure '7 is an end elevation of a modified form of bolster end insert structure and Figure 7A is a sectional view therethrough taken substantially in the plane indicated by the line A-A of Figure 7.

Describing my novel structure in greater detail and referring particularly to the modification shown in Figures 1 to 4 inclusive, the side frame 2 comprises the compression member 4 and the tension member 6 joined by the integral columns 8, ,8 forming therewith a bolster opening I0 within which may be received the end of the bolster I2, said bolster end projecting through the opening II) and being seated upon the spring group diagrammatically indicated at I4, I4 and which includes the top spring plate I5. The spring group I4 is positioned upon the spring seat I6 formed on said tension member 6-be neath said window opening. The tension member 6 beneath said opening has the box section best seen from the view of Figure with a. 1ongitudinal center rib I8, a bottom chord 2|] and a top chord 22 widened and formed with

upstanding anges

24, 24, thus formingr a trough Within which the said spring group I4 may be securely seated. 'I'he bottom Wall 26 of the bolster is recessed transversely thereof y asat 28 to overlie the

insert members

30, 30, said insert members being afforded interlocking lugs at their abutting ends as more particularly described hereafter. Each insert 30 is an Lv-shaped structure with a base Web 32 and an upright guide portion generally designated 34, the juncture of said webV and upright portion being reinforced by the central diagonal rib 36. The upright or guide portion 34 has vertical spaced arcuate portions indicated at 38, 38 with an intervening channel 40, said arcuate portion and intervening channel having a form complementary with that of the engaging guide surface on the column 8 whereon the guide surface is defined by spaced

concave faces

42, 42 with an intervening flange 44. At `the top of the upright portion 34 is formed the transverse web or shelf 46 defining With the center web and lateral edges ofV said upright portion a plane surface 48 for abutment Each insert 30 is formed at one end with means for interlocking with a similar means ofthe other insert 3B, said means comprising a recess 50 at one side thereof and a projecting lug 52 at the opposite side thereof. On each lug 52 is formed the stud 54 which is receivable `im the eye 5s formed for the associated side frame.

`nection between the insert members.

that purpose in the top wall defining the recess 59. At the bottom web of each insert is formed a central opening 58 serving as a means of engagement with positioning studs (not shown) on the top spring plate I5. The lateral edges of the bottom web of each insert are arcuate in form and complementary, as indicated at 60, 60 with the edges of the recess in the bottom wall of the bolster within which the insert is received, all as best seen in the top plan view of Figure 1. When the insert is assembled relationship beneath the bolster, the rib 36 is received within the transverse slot 62 formed in the bottom and side walls of the bolster for that purpose.v

It may be noted that the depth of the vertical portion 34 of each insert is equal to the depth of the bolster end as best seen inthe side elevation of Figure 2. Thus the inserts 30 are the sole means of connection between the bolster end and In assembly the spring group is positioned upon thespring seat I6 and the inserts 30 are seated thereupon with their adjacent ends in interlock- :ingrengag'ement and the upright portions thereof engaging the complementary portions of the cclumns. Thereafter the bolster end may be inserted into the bolster opening between the inserts and seatedthereon, the inserts being re- 'ceived within the recess in the bottom of the bolster as already described. If desired, the ribs .36 Vof the insert may be modied to the form shown Yat 64 in Figure 2A and provided with an opening 6& for reception of a cotter key or retaining bolt by means of which accidental dis- ,mantling of the bolster Amay be prevented. It will :be readily apparent to those skilled in the art that the two insert ,members 39, 30 after assembly joperate substantially as a single member more or. less similar to the insert member described in, my above-mentioned patent with the excep- 'Vtion that full length column engaging surfaces are afforded on the inserts of my present, modifilcation.

Figure 5 shows a modified form of end con- In this modification the ends of adjacent inserts abut each otheralong the plane surfaces indicated at -68 and centrally of said abutting end is formed the upright lug 10, a portion of said lug being Aformed as at 12 along -the plane. dened by the surface 68. The lug is afforded a transverse eye 14 aligned with the eye of the adjacent lug 'l0 and affording a means of connection between abutting insert members by the insertion of a cotter key or bolt through said aligned eyes.

Figures 6 and 'l show my novel form `of insert vadapted for association with a well known form .of side frame column guide surface wherein the .column is formed with a concave cylindrical bolster engaging surface. In the modification shown in Figures 6 and 6A the insert 16 is recessed in the'bottom wall 18 of the bolster 80 in a manner similar to that described for the previous modi- 'cationf In the present modification, however, the upright portion 82 of the insert is formed wthfinboard and outboard

lateral lugs

84, 84 for abutment with the edges of an associated side Vframe'A column and between the saidlugs the web V86 presents a convex surface for complementary engagement with* its associated column surface. Thebolster 80 has the inboard guide lug 88 abutting the inboard edge of the insert 82 and the outboard guide lug 90 abutting the top outboard 4edge of thek insert member.

tion the insert member is formed with a central In this modicaupstanding lug 92 received within the hollow boss 94 formed for that purpose on the bottom Wall of the bolster and aligned openings in said lug and boss afford means of securing said insert to said bolster after assembly by insertion therethrough of a key or retaining bolt.

The modication shown in Figure 7A is similar to that shown in Figures 6 and 6A, differing therefrom only in the omission of the connecting lug and boss between the bolster 95 and the insert. Instead of such a connection the modification of Figures 'l' and 7A shows an insert 95 with a bottom web upturned at its inner end as at 98 along the edge which affords abutment with asimilar insert 96 at the opposite side of the bolster 95 and the upturned flange 98 is received within the slot Ill formed for that purpose in the bottom wall of the bolster 95 longitudinally thereof. The upright portion l02 of the insert 96 is identical with that shown in the modiiication of Figure 6. If desired, the abutting flanges 98 of the inserts may be extended above the bottom wall of the bolster and formed with aligned eyes to accommodate a retaining key therein similar to other keying means shown herewith.

It is to be understood that I do not wish to be limited by the exact embodiments of the device shown which are merely by way of illustration and not limitation as various and other forms ofthe device will, of course, be apparent to those skilled in the art Without departing from the spirit of the invention or the scope of the claims.

I claim:

1. In a railway car truck, a side frame having a compression member, a tension member, and spaced columns defining a bolster opening, guide surfaces on said columns centrally thereof including a concave cylindrical surface, a spring group seated on said tension member beneath said opening, a bolster end projecting through said opening, and a bolster interlocking member seated on said spring group adjacent each column with a horizontal web recessed in the bottom of said bolster end, a vertical portion having guide means complementary in form t0 the guide means on the adjacent column and including a convex cylindrical portion, each of said vertical portions having guiding engagement with said columns for the full depth of said bolster end, said bolster end having vertical overlapping relationship with said members for a depth less than the clearance between the top of said bolster end and said compression member to permit assembling or dismantling therethrough of said bolster end while said spring group and interlocking members are in normal assembled relationship, each of said interlocking members extending transversely of said bolster for abutment with each other adjacent the longitudinal center line of said bolster end, and means on said interlocking members adjacent their abutting ends in overlapping relationship longitudinally, laterally and vertically of said truck to prevent movement of translation with respect to each other.

2. In a railway car truck, a side frame having a tension member, a compression member, and spaced columns forming therewith a bolster opening, a spring group supported on said tension member beneath said bolster opening, a bolster end projecting through said opening, each of said columns having guide means thereon, bolster interlocking members seated on said spring group with portions recessed in the bottom of said bolster, each of said interlocking members having an upright portion `extending for approximately the depth of said bolster end between said bolster end and the adjacent guide column, each of said interlocking members having guide means of complementary form with the guide means on said column and cooperating therewith, said bole ster having means in vertical overlapping relationship with each of said interlocking members for a distance less than the clearance between the top l of said bolster and said compression member; whereby said bolster end may be assembled or dismantled through the top of said openin'g while said interlocking members are in assembled position upon the spring group, and means on said interlocking members overlapping each other laterally, longitudinally and vertically of said truck within said bolster recess to prevent relative movement therebetween when in: normal assembled relationship.

3. In a railway car truck, a side frame having a tension member, a compression member, and spaced columns forming therewith a bolster opening, a spring group supported on said tension member beneath said bolster opening, a bolster end projecting through said opening, each of sai-d columns having guide means thereon, bolster interlocking members seated on said spring group with portions recessed in the bottom of said bolster end, each of said interlocking members having an upright portion extending for substantially the depth of said bolster end between said bolster end and the adjacent guide column, each of said interlocking members having guide means of complementary form with the guide means on said columnand cooperating therewith, said bolster having means in vertical overlapping relationship with eachV of said interlocking members for a distance less than the clearance between the top of said bolster and said compression member, whereby said bolster end may be assembled or dismantled through the top of said opening while said interlocking members are in assembled position upon said spring group, and overlapping means on said interlocking members within the recessed portion of said bolster securing said members against movement of translation with respect to each other.

4. In a railway car truck, a Side frame having a tension member, a compression member, and spaced columns forming therewith a bolster opening, a spring group seated on said tension member beneath said bolster opening, a bolster end projecting through said opening, each of said columns having guide means thereon, bolster interlocking members seated on said spring group and recessed in the bottom of said bolster, each of said interlocking members having an upright portion extending for the full depth of said bolster end and between said bolster end and the adjacent guide column, each of said interlocking members having guide means of complementary form with the guide means on said column and cooperating therewith, said bolster having means in vertical overlapping relationship with each of said interlocking members for a distance less than the clearance between the top of said bolster and said compression member, whereby said bolster end may be assembled or dismantled through the top of said opening while said interlocking members are in assembled position upon said spring group, and means on each member extending transversely beyond the longitudinal center line of said bolster and adapted to interlock said members to prevent relative movement therebetween.

5. `In a railway car truck, a side frame having a tension member, a compression member, and spaced columns forming therewith a bolster opening, a spring group supported on said tension member beneath said bolster opening, a bolster end projecting through said opening, each of said columns having guide means thereon, and bolster interlocking means seated with said bolster end on said spring group and recessed in the bottom wall of said bolster, each of said interlocking means -having an upright portion extending for the'full depth of said bolster end and between said bolster end and the adjacent guide column,` each of said interlocking means having guide means of complementary form with the guide means on said column and cooperating therewith, each of said interlocking means having seeming members certain' of which extend through said bottom wall and others of which have overlapping relationship to prevent relative movement of said interlocking means, said bolster having means in vertical overlapping relationship with said securing members for a depth less than the clearance between the top of said bolster and said compression member whereby said bolster end may be assembled or dismantled through the top of said opening while said interlocking means are in assembled position upon said spring group.

6. In a railway car truck, a side frame having a compression member, a tension member, and spaced columns forming therewith a bolster opening, guide means on said columns, a spring group on said tension member beneath said opening, a bolster end extending through said opening, and a plurality of bolster interlocking members seated with said bolster end on said spring group, each of said members having complementary guide means engaging the guide means on said column for substantially the depth of said bolster end, said bolster end having vertical overlapping relationship with portions of said members for a depth less than the clearance between the top of said bolster end and said compression member to permit assembling or dismantling of said bolster end through the top of said opening while said spring group and said members are in normal assembled relationship, said interlocking members having horizontal portions recessed within the bottom wall of said bolster end and extending transversely thereacross and each presenting means for overlapping interengagement with the corresponding means on the other horizontal portion adjacent to the longitudinal center line of said bolster end, and upstanding means on said members extending through said bottom wall and cooperating with said horizontal portions to prevent excessive lateral play of said members with respect to said bolster end.

7. In a railway car truck, a side frame having `a tension member, a compression member, and

spaced columns forming therewith a bolster opening, a spring group seated on said tension member beneath said bolster opening, a bolster end projecting through said opening, each of said columns having guide means thereon, bolster interlocking members seated with said bolster end on said spring group and recessed in the bottom of said bolster, each of said interlocking members having an upright portion extending for the full depth of said bolster end and between said bolster end and the adjacent guide column, each of said interlocking members having guide means of complementary form with the guide means on said column and cooperating therewith, said bolster having means in vertical overlapping relations'hip with each of said interlocking members for a distance less than the clearance between the top of said bolster and said compression member, whereby said bolster end may be assembled or dismantled through the top of said opening while said interlocking members are in assembled position upon said spring group, and means adjacent the longitudinal center line of said bolster interlocking said members.

8. In a railway car truck, a side frame having a tension member, a compression member, and spaced columns forming therewith a bolster opening, a spring group seated on said tension member beneath said bolster opening, abolster end projecting through said opening, each of said columns having guide means thereon, bolster interlocking members seated with said'bolster end on said spring group and recessed in the bottom of said bolster, each of said interlocking members having an upright portion extending for the full depth of said bolster end and between said bolster end and the adjacent guide column, each of said interlocking members having guide means of complementary form With the guide means on said column and cooperating therewith, said bolster having means in vertical overlapping relationship with each of said interlocking members for a distance less than the clearance between the top of said bolster and said compression member, whereby said bolster end may be assembled or dismantled through the top of said opening while said interlocking members are in assembled position upon said spring group, and means interlocking said members with each other and with said bolster, whereby said bolster and members act as a unit when assembled.

ROBERT B. COT'IREIL.