Articulated rail car connector

Abstract

An articulated connector for flexibly connecting the adjacent ends of a pair of rail car platforms which are supported on a common truck bolster, the connector comprising a spherical bearing formed integrally with a conventional center plate bearing of one car platform, and spherical elements carried by the other car platform for cooperable engagement with the spherical bearing to transmit vertical, lateral and longitudinal train forces between the adjacent platforms solely through engagement of the mating spherical bearing elements.

I claim: 
     
       1. In a rail car assembly having a wheeled truck with wheels which are engagable with a railway . .truck.!. .Iadd.track .Iaddend.for rolling movement thereon, and a pair of rail car platforms having adjacent ends thereof supported in common by the truck, a connector apparatus that is cooperable with such a truck and such adjacent platform ends to transmit loads between the pair of platforms while maintaining flexible support of the adjacent platform ends with respect to each other and with respect to the truck, said connector apparatus comprising: a first connector portion rigidly affixed to one of such adjacent platform ends;   a second connector portion rigidly affixed to the other of such adjacent platform ends;   one of said first and second connector portions including center plate bearing means adapted for cooperation with a bearing portion of such a truck to provide vertical and lateral support of said one of said connector portions with respect to such a truck;   said one of said connector portions further including a first bearing means having convex spherical bearing surface means, and said other of said connector portions including a second bearing means having concave spherical bearing surface means;   said first and second bearing means being mutually cooperable to provide load bearing support of said connector portions with respect to one another; and   at least one of said concave and convex spherical bearing surface means being a discontinuous spherical bearing surface means comprised of a plurality of truncated spherical bearing surface elements which are engagable with the other of said concave and convex spherical bearing surface means to provide substantially all required load bearing support of said connector portions with respect to one another.   
     
     
       2. The connector as set forth in claim 1 wherein said first bearing means is an upstanding, integral bearing portion of said one connector portion. 
     
     
       3. The connector as set forth in claim 2 wherein said upstanding, integral bearing portion extends generally coaxially with respect to said center plate bearing means. 
     
     
       4. The connector as set forth in claim 3 wherein said upstanding, integral bearing portion and said center plate bearing means include vertically extending cavity means adapted to receive locating pin means of such a truck therein. 
     
     
       5. The connector as set forth in claim 1 additionally including compensation means which is cooperable with at least one of said plurality of truncated spherical bearing surface elements to continuously compensate for slack between said first and second connector portions. 
     
     
       6. The connector as set forth in claim 5 wherein said compensation means is a gravitationally operable compensation means. 
     
     
       7. The connector as set forth in claim 6 wherein said gravitationally operable compensation means includes wedge means operable under the influence of gravity to continuously urge said at least one of said plurality of truncated spherical bearing surface elements into engagement with said load bearing surface means of said other of said connector portions. 
     
     
       8. The connector as set forth in claim 1 wherein said plurality of truncated spherical bearing surface elements includes at least a first spherical bearing surface element disposed for vertical and lateral load bearing support of said connector portions with respect to one another. 
     
     
       9. The connector as set forth in claim 8 wherein said first spherical bearing surface element is engagable with a respective spherical bearing surface portion of said other of said spherical bearing surface elements throughout an included angle of sufficient magnitude to provide lateral restraint of said connector portions by means of lateral components of vertical loads borne by engagement of said first spherical bearing surface element with said spherical bearing surface portion. 
     
     
       10. The connector as set forth in claim 9 wherein said included angle is in the range of approximately 75° degrees to approximately 83° degrees. 
     
     
       11. The connector as set forth in claim 10 wherein said included angle is approximately 75°. 
     
     
       12. The connector as set forth in claim 1 wherein said at least one of said concave and convex spherical bearing surface means is said concave spherical bearing surface means. 
     
     
       13. The connector as set forth in claim 1 wherein at least some of said plurality of truncated spherical bearing surface elements are independently adjustable with respect to others of said truncated spherical bearing surface elements for engagement with the other of said concave and convex spherical bearing surface means. 
     
     
       14. The connector as set forth in claim 1 wherein said truncated spherical bearing surface elements are of an essentially uniform spherical radius. 
     
     
       15. In a connector assembly for flexibly connecting a pair of adjacent rail car platform ends for the transmission of loads therebetween wherein the connector includes first and second connector portions carried by the adjacent rail car platform ends and each said connector portion includes load bearing surface means, and one of said connector portions includes a plurality of independent bearing elements with a respective plurality of load bearing surface portions which are cooperable with the other of said connector portions to bear loads transmitted between the pair of rail car platforms in a manner that said plurality of load bearing surface portions collectively bear essentially all of the loads transmitted between the pair of rail car platforms, the improvement comprising: at least some of said load bearing surface portions being truncated spherical bearing surface segments forming a discontinuous spherical bearing surface essentially of a uniform spherical radius.   
     
     
       16. The improvement as set forth in claim 15 wherein said truncated spherical bearing surface segments are concave spherical bearing surface segments. 
     
     
       17. The improvement as set forth in claim 16 wherein ones of said truncated spherical bearing surface segments are independently adjustable with respect to others of said truncated spherical bearing surface segments. .Iadd. 
     
     
       18.  The connector assembly as set forth in claim 2 wherein said first bearing means includes a neck portion connecting said convex spherical bearing surface means to said one of said connector portions. .Iaddend..Iadd.19. The connector assembly as set forth in claim 18 wherein the cross sectional configuration of said neck portion in a generally horizontal plane includes perimeteral portions of said cross sectional configuration having a mean radius equal to or greater than the spherical radius of said convex spherical bearing surface means. .Iaddend..Iadd.20. The connector assembly as set forth in claim 19 wherein said cross sectional configuration of said neck portion is of a generally rectangular form in said horizontal plane. .Iaddend..Iadd.21. The connector assembly as set forth in claim 20 wherein said generally rectangular form includes corner portions and side portions extending intermediate said corner portions, and said perimeteral portions of a radius greater than the spherical radius of said convex spherical bearing surface means include ones of said side portions. .Iaddend..Iadd.22. The improvement as set forth in claim 15 wherein others of said load bearing surface portions are connected to the respective one of said first and second connector portions by a neck portion having a cross sectional configuration with perimeteral portions of a radius greater than the spherical radius of said spherical bearing surface segments. .Iaddend..Iadd.23. The improvement as set forth in claim 22 wherein said cross sectional configuration of said 
     
     
        neck portion is a generally rectangular form. .Iaddend..Iadd.24.  The improvement as set forth in claim 23 wherein said generally rectangular form includes corner portions and side portions extending intermediate said corner portions, and said perimeteral portions of a radius greater than the spherical radius of said spherical bearing surface segments include ones of said side portions. .Iaddend.