Radial steering rack for secondary framework

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.