Bolster friction pocket

Abstract

Systems are provided for railroad car truck including a bolster. In one example, the bolster may include a top member including a bolster bowl, a bottom member extending downward from the top member, a first end of the bolster pocket positioned at a first end of the top member and a second end of the bolster positioned distal from the first and of the bolster, and at least one friction pockets. Each of the at least one friction pocket is not defined by a shelf.

1 . A bolster, comprising:
 a top member having surfaces that define a bolster bowl;   a bottom member coupled to and extending downward from the top member;   a first end of the bolster positioned at a first end of the top member and a second end of the bolster positioned distal from the first end of the bolster; and   at least one friction pocket positioned at first and/or second end of the bolster, the at least one friction pocket defined by a longitudinally inner wall, a longitudinally outer wall, and a rear wall, and wherein the at least one friction pocket is not defined by a shelf.   
     
     
         2 . The bolster of  claim 1 , wherein the at least one friction pocket includes a first column and a second column positioned internal to the bolster at a first corner and a second corner of the at least one friction pocket. 
     
     
         3 . The bolster of  claim 2 , wherein the at least one friction pocket further includes a longitudinal rib positioned internal to the bolster and perpendicular to the longitudinally inner wall of the at least one friction pocket. 
     
     
         4 . The bolster of  claim 3 , wherein the at least one friction pocket further includes a first pocket positioned at an interface of the longitudinally inner wall of the at least one friction pocket and the rear wall of the at least one friction pocket and a second pocket at an interface of the longitudinally outer wall of the at least one friction pocket and the rear wall of the at least one friction pocket. 
     
     
         5 . The bolster of  claim 3 , wherein the at least one friction pocket further includes a first lateral rib and a second lateral rib, each extending from an interior surface of the rear wall of the at least one friction pocket to a center rib along a roof of the bolster. 
     
     
         6 . The bolster of  claim 1 , wherein the at least one friction pocket includes a longitudinal rib positioned internal to the bolster and perpendicular to the longitudinally inner wall of the at least one friction pocket. 
     
     
         7 . The bolster of  claim 1 , wherein the at least one friction pocket includes a first lateral rib and a second lateral rib, each extending from an interior surface of the rear wall of the at least one friction pocket to a center rib along a roof of the bolster. 
     
     
         8 . The bolster of  claim 7 , wherein the at least one friction pocket further includes a longitudinal rib positioned internal to the bolster and perpendicular to the longitudinally inner wall of the at least one friction pocket. 
     
     
         9 . The bolster of  claim 8 , wherein the at least one friction pocket further include a first pocket positioned at an interface of the longitudinally inner wall of the at least one friction pocket and the rear wall of the at least one friction pocket and a second pocket at an interface of the longitudinally outer wall of the at least one friction pocket and the rear wall of the at least one friction pocket. 
     
     
         10 . The bolster of  claim 9 , wherein the at least one friction pocket further includes a first column and a second column positioned internal to the bolster at a first corner and a second corner of the at least one friction pocket. 
     
     
         11 . The bolster of  claim 7 , wherein the at least one friction pocket further includes a first column and a second column positioned internal to the bolster at a first corner and a second corner of the at least one friction pocket. 
     
     
         12 . The bolster of  claim 11 , wherein the at least one friction pocket further includes a first pocket positioned at an interface of the longitudinally inner wall of the at least one friction pocket and the rear wall of the at least one friction pocket and a second pocket at an interface of the longitudinally outer wall of the at least one friction pocket and the rear wall of the at least one friction pocket. 
     
     
         13 . The bolster of  claim 7 , wherein the at least one friction pocket further includes a first pocket positioned at an interface of the longitudinally inner wall of the at least one friction pocket and the rear wall of the at least one friction pocket and a second pocket at an interface of the longitudinally outer wall of the at least one friction pocket and the rear wall of the at least one friction pocket. 
     
     
         14 . The bolster of  claim 1 , wherein the at least one friction pocket includes a first pocket positioned at an interface of the longitudinally inner wall of the at least one friction pocket and the rear wall of the at least one friction pocket and a second pocket at an interface of the longitudinally outer wall of the at least one friction pocket and the rear wall of the at least one friction pocket. 
     
     
         15 . The bolster of  claim 14 , wherein the at least one friction pocket further includes a longitudinal rib positioned internal to the bolster and perpendicular to the longitudinally inner wall of the at least one friction pocket. 
     
     
         16 . The bolster of  claim 14 , wherein the at least one friction pocket further includes a first column and a second column positioned internal to the bolster at a first corner and a second corner of the at least one friction pocket. 
     
     
         17 . A truck, comprising:
 a first side frame and a second side frame; and   a shelf-less bolster supported by the first side frame and the second side frame, the shelf-less bolster including:   a friction pocket positioned at a first end and/or a second end of the shelf-less bolster; and   a wedge positioned in the friction pocket, wherein the friction pocket is configured to allow the wedge to move freely in a vertical direction, into and out of the friction pocket.   
     
     
         18 . The truck of  claim 17 , wherein the first side frame and the second side frame prevent movement of the wedge in a lateral direction, and wherein a longitudinally inner wall and a longitudinally outer wall of the friction pocket to reduce or eliminate movement of the wedge in a longitudinal direction, and wherein the wedge can only move freely in the vertical direction. 
     
     
         19 . The truck of  claim 17 , wherein the shelf-less bolster includes cast features configured to prevent cracking of the shelf-less bolster. 
     
     
         20 . A shelf-less bolster, comprising:
 a friction pocket bounded by a longitudinally inner wall, a rear wall, and a longitudinally outer wall;   a first pocket positioned at an interface between a lower portion of the rear wall and the longitudinally inner wall and a second pocket positioned at an interface between the lower portion of the rear wall and the longitudinally outer wall, and wherein a radius of curvature at the interface of the longitudinally inner wall and the lower portion of the rear wall and at the interface of the longitudinally outer wall and the lower portion of the rear wall is large;   internal cast features including:   a first column extending laterally from the longitudinally outer wall and a second column extending laterally from the longitudinally inner wall, wherein a middle vertical portion of an inner side of the first column and the second column are each slanted at an angle, the angle equal to an angle of the rear wall;   a longitudinal rib extending perpendicularly from the longitudinally inner wall and parallel to an inner front wall of the friction pocket, wherein the longitudinal rib is positioned laterally in front of the second column;   a first lateral rib and a second lateral rib, each extending from the rear wall to a center rib of the shelf-less bolster and each are positioned equidistant from a longitudinal center of the rear wall, wherein the first lateral rib and second lateral rib are integrally formed with rear wall, the center rib, and a roof of the shelf-less bolster, and wherein the first lateral rib and the second lateral rib are spaced away from a floor of the shelf-less bolster; and   wherein the first and second pockets, the first and second columns, the longitudinal rib, and the first and second lateral ribs are configured to prevent cracking of the shelf-less bolster.