摘要:
Yaw stabilization means (51, 52) provides a light-weight means for increasing the linear yaw stiffness levels between the side frame (22, 24) and bolster (38) to provide the proper inter-axle shear stiffness without affecting the compliancy required of the vertical suspension system. This invention, which fails to increase the unsprung weight of a railroad car truck assembly (20) noticeably, may be retrofitted to existing freight car trucks in service or incorporated into newly manufactured trucks. Moreover, it does so without the need for damping wedges to increase interaxle shear stiffness and allow the wedges to function optimally for control of vertical vibrations.
摘要:
A railway car truck (20) having a pair of side frames (22) and a bolster (24) and a transom (26) extending transversely between the side frames (22). A respective rocker seat (104) is rigidly and permanently attached to each end of the transom (26) and is pivotally supported on a rocker bar (106) that is supported by the tension member (34) of a sideframe (22). The pivotal connection between the rocker seat (104) and the rocker bar (106) disposes the transom (26) perpendicular to the side frame (22) and provides pivotal movement of the side frame (22) with respect to the transom (26). The railway car truck (20) is assembled by inserting the ends of the bolster (24) and transom (26) into the window (40) of a side frame (22), and then inserting the rocker bar (106) through a passageway in the side frame (22) to a position under the rocker seat (104) and on the bottom tension member (34) of the side frame (22). Springs (74) are then inserted between the transom (26) and the bolster (24) such that the bolster (24) is resiliently supported on the side frame (22).
摘要:
A railway truck frame (20) for a railway truck including a first side frame (50) and a second side frame, each side frame having an inverted trapezoidal-shaped window (68) including a first inclined side and a second inclined side. The truck frame also includes a bolster (54) having a first end and a second end which extends transversely between the first and second side frames. Each end of the bolster includes a first inclined channel and an opposing second inclined channel. Each channel includes an exterior flange, a spaced apart interior flange, and a bearing surface located between the exterior and the interior flanges. Each inclined side of a window is adapted to be located in a respective first or second channel between the exterior flange and the interior flange ofthe channel and in engagement with the bearing surface of the channel. A locking device (180) such as a jack is located in each window between the top of the end of the bolster and the top side (78) of the window which selectively forces the end of the bolster downwardly into engagement with the side frame such that the end ofthe bolster is rigidly but removably connected to the side frame.
摘要:
A lightweight truck bolster (10) for railway car trucks has metal removed in the compression member (18) and tension member (20) of the bolster (10) near the center bowl (12) of the bolster (10). The bolster (10) includes one longitudinal rib (48) located in each end of the bolster arms (14, 16) and a pair of transversely extending vertical ribs (30) located on opposing sides of the center bowl (12) and extending from the tension member (20) to the compression member (18). The bolster (10) satisfies the Association of American Railroads (A.A.R.) design qualifications for truck bolsters while it is weighing significantly less than traditional truck bolsters.
摘要:
La présente invention se rapporte à un dispositif d'ap= pui élastique comportant un anneau en élastomère dans lequel sont disposés des anneaux intercalaires rigides adhérant à l'élastomère et pouvant en particulier être monté en série avec un ressort hélicoïdal notamment dans une suspension secondaire de bogie ferroviaire. Le dispositif est caractérisé par le fait qu'il comporte, au centre de l'alésage (14) de l'anneau en élastomère, une butée centrale (2) dont la surface extérieure (24) est séparée, en l'absence de sollicitation, de la surface en élastomère de l'alésage de l'anneau et est susceptible d'entrer progressivement en contact avec ladite surface en élastomère de l'alésage lorsque l'anneau est soumis à une sollicitation horizontale croissante.
摘要:
A rubber/metal spring element, in particular for use in bogies of rail vehicles, wherein the rubber/metal spring element is arranged between an upper connection element, which is connected to the sprung mass, and a lower connection element, which is connected to the unsprung mass, and is constructed in the form of a conical layer spring made up of a plurality of alternately and concentrically arranged layers made of elastomeric material or rubber, on one hand, and metal, on the other hand, wherein the individual layers are designed in the form of conical annular bodies, wherein the two conical surfaces of at least one of the conical annular bodies have different cone angles in relation to the common vertical axis of the concentric rubber and metal layers forming the conical layer spring.
摘要:
A rail road freight car truck has a truck bolster and a pair of side frames, the truck bolster being mounted transversely relative to the side frames. The mounting interface between the ends of the axles and the sideframe pedestals allows lateral rocking motion of the sideframes in the manner of a swing motion truck. The lateral swinging motion is combined with a longitudinal self steering capability. The self steering capability may be obtained by use of a longitudinally oriented rocker that may tend to permit resistance to deflection that is proportional to the weight carried across the interface. The truck may have auxiliary centering elements mounted in the pedestal seats, and those auxiliary centering elements may be made of resilient elastomeric material. The truck may also have friction dampers that have a disinclination to stick-slip behaviour. The friction dampers may be provided with brake linings, or similar features, on the face engaging the sideframe columns, on the slope face, or both. The friction dampers may operate to yield upward and downward friction forces that are not overly unequal. The friction dampers may be mounted in a four-cornered arrangement at each end of the truck bolster. The spring groups may include sub-groups of springs of different heights.
摘要:
A radial steering rack for secondary framework comprises wheelsets, lateral racks, a swing bolster, a wheelset radial device and a braking device. Bearing saddles (41) forming the wheelset radial device are fixedly connected with the secondary framework (42) via pulling rivets (11), and each group of the bearing saddles (41) is bilaterally symmetrical in structure with a symmetry plane (A). The secondary framework (42) comprises an arm part (51) and an end part (52); a connection hole (61) is arranged on the end part (52); transverse positioning bosses (73) are arranged on the bearing saddles (41); and an arc groove (75) and symmetrical connection holes (71) are arranged on a connection base (72). The wheelset radial device is a split casting structure, therefore the dead weight of the assembled wheelset radial device is greatly reduced, the unstrung weight of the steering rack is reduced, the action force of the wheel and the track is effectively reduced, the dynamics properties of the vehicle and the stress state of the secondary framework are improved, and the fatigue life of the secondary framework is prolonged. The bearing saddles use the same standard structure, hence, the more precise design and machining can be realized, and the cost is reduced, and meanwhile, the maintenance technique of the secondary framework is improved, and the maintenance cost is reduced.
摘要:
A radial steering rack for secondary framework comprises wheelsets, lateral racks, a swing bolster, a wheelset radial device and a braking device. Bearing saddles (41) forming the wheelset radial device are fixedly connected with the secondary framework (42) via pulling rivets (11), and each group of the bearing saddles (41) is bilaterally symmetrical in structure with a symmetry plane (A). The secondary framework (42) comprises an arm part (51) and an end part (52); a connection hole (61) is arranged on the end part (52); transverse positioning bosses (73) are arranged on the bearing saddles (41); and an arc groove (75) and symmetrical connection holes (71) are arranged on a connection base (72). The wheelset radial device is a split casting structure, therefore the dead weight of the assembled wheelset radial device is greatly reduced, the unstrung weight of the steering rack is reduced, the action force of the wheel and the track is effectively reduced, the dynamics properties of the vehicle and the stress state of the secondary framework are improved, and the fatigue life of the secondary framework is prolonged. The bearing saddles use the same standard structure, hence, the more precise design and machining can be realized, and the cost is reduced, and meanwhile, the maintenance technique of the secondary framework is improved, and the maintenance cost is reduced.