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公开(公告)号：US20210039689A1
公开(公告)日：2021-02-11
申请号：US16978671
申请日：2018-12-12
发明人： Yuan CAO , Yangchun MIN , Xihong JIN , Shangqiang CHEN , Mingming LI
摘要： A coupling box of a rail vehicle, including a fixed portion fixedly mounted on a vehicle body and a movable portion connecting to a coupler and draft gear; the movable portion is connected to an inner end of the fixed portion by means of a constant-force connecting member, the constant-force connecting member is broken when the coupler and draft gear pushes the movable portion to move inwardly at the time of a collision, so that the movable portion and the fixed portion are able to be separated from each other.
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