Patent ID: 9616904
Date: 2017-04-11
CPC Classifications: B61G

Claim:
1. A telescopic mechanism in a telescopic hitch buffer device for use in high speed electric multiple unit (EMU) trains, wherein the telescopic mechanism comprises a compression rod ( 2 ) located inside a movable housing ( 1 ) of said hitch buffer device, one end of said compression rod ( 2 ) being connected to the movable housing ( 1 ), and a bearing connector ( 3 ) encasing the compression rod ( 2 ); a guiding barrel ( 4 ) is fixedly mounted outside the bearing connector ( 3 ); an extension/retraction driving mechanism ( 9 ) is provided between the guiding barrel ( 4 ) and the movable housing ( 1 ); one end of the compression rod ( 2 ) is connected to the movable housing ( 1 ) via a torsion spring ( 5 ), for keeping the compression rod ( 2 ) and the bearing connector ( 3 ) in a locked state; a locking mechanism comprises protrusions ( 6 ) distributed at another end of the compression rod ( 2 ), and grooves ( 7 ) in engagement with the protrusions ( 6 ) on the inner wall of the bearing connector ( 3 ); the locking mechanism is in an unlocked state when the protrusions ( 6 ) face the grooves ( 7 ), both the compression rod ( 2 ) and the bearing connector ( 3 ) can slide relative to each other; an unlocking driving mechanism ( 8 ) is provided on the outside of the movable housing ( 1 ).