| 摘要 |
A railcar axle box suspension includes a coupling mechanism configured to couple an axle box to a bogie frame, and the coupling mechanism includes: an axle beam including a tubular portion; a core rod inserted through the tubular portion, protruding portions being provided at both sides of the core rod; a pair of receiving seats provided at the bogie frame and including fitting grooves, the protruding portions being fitted in the fitting grooves; a pair of lid members supporting the respective protruding portions; fastening mechanisms fixing the lid members to the receiving seats; and locking members. Each of the receiving seats includes a first screw hole. Each of the lid members includes a first insertion hole and a second screw hole. Each of the fastening mechanisms includes: a first bolt; a second bolt; and a plate having a fitting hole and a second insertion hole, the fitting hole being fitted to a head portion of the first bolt and restricting rotation of the first bolt, a shaft portion of the second bolt being inserted through the second insertion hole. The first bolt is threadedly engaged with the first screw hole through the first insertion hole. The fitting hole of the plate is fitted to the head portion of the first bolt, and the second bolt is threadedly engaged with the second screw hole through the second insertion hole. Each of the locking members restricts rotation of the second bolt relative to the second screw hole. |
| 主权项 |
1. A railcar axle box suspension comprising a coupling mechanism configured to couple an axle box to a bogie frame,
the coupling mechanism including
an axle beam extending from the axle box along a car longitudinal direction and including a tubular portion, the tubular portion being located at an extending direction end portion of the axle beam and being open to both sides in a car width direction,a core rod inserted through an internal space of the tubular portion and extending in the car width direction, protruding portions being provided at both respective car width direction sides of the core rod,a pair of receiving seats provided at the bogie frame and including respective fitting grooves, the protruding portions being fitted in the respective fitting grooves,a pair of lid members supporting the respective protruding portions fitted in the fitting grooves,fastening mechanisms fixing the lid members to the receiving seats, andlocking members for the fastening mechanisms, the receiving seats each including a first screw hole having an inner peripheral surface, an internal thread being formed on the inner peripheral surface, the lid members each including a first insertion hole and a second screw hole having an inner peripheral surface, an internal thread being formed on the inner peripheral surface, the fastening mechanisms each including
a first bolt threadedly engaged with the internal thread of the first screw hole,a second bolt threadedly engaged with the internal thread of the second screw hole, anda plate having a fitting hole and a second insertion hole, the fitting hole being fitted to a head portion of the first bolt and restricting rotation of the first bolt, a shaft portion of the second bolt being inserted through the second insertion hole, the first bolt being threadedly engaged with the first screw hole through the first insertion hole, the fitting hole of the plate being fitted to the head portion of the first bolt, and the second bolt being threadedly engaged with the second screw hole through the second insertion hole, and the locking members each restricting at least rotation of the second bolt relative to the second screw hole. |
