Embedded rigid catenary expansion joint, system and railway vehicle

The utility model discloses an embedded rigid catenary expansion joint, a system and a railway vehicle, and belongs to the technical field of railway vehicle rigid catenaries, the embedded rigid catenary expansion joint comprises a first support and a second support which are in sliding connection with each other, the first support is provided with a first sliding groove, and the second support is provided with a second sliding groove; a first clamping block in sliding connection with the second sliding groove is arranged at the end of the first support, and a second clamping block in sliding connection with the first sliding groove is arranged at the end of the second support. 本实用新型公开了一种嵌入式刚性接触网膨胀接头、系统及轨道车辆，属于轨道车辆刚性接触网技术领域，包括相互滑动连接的第一支架和第二支架，所述第一支架开设第一滑槽，所述第二支架开设第二滑槽，所述第一支架端部设置与第二滑槽滑动连接的第一卡块，所述第二支架端部设置与第一滑槽滑动连接的第二卡块。