公开(公告)号：US10480551B2

公开(公告)日：2019-11-19

申请号：US15507724

申请日：2016-05-16

Applicant: CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO., LTD.

Inventor： Baolei Hao ,  Changjun Gao ,  Mingxing Wang ,  Feng Miao ,  Lei Cui ,  Xiaowei Zhang ,  Yuguo Niu

IPC: F15B21/044 ,  F15B21/04 ,  F02M26/20 ,  F02M26/21 ,  F01M13/02 ,  F16H57/027 ,  F15B1/26 ,  B60T17/06 ,  B01D19/00 ,  F16K24/00 ,  F15B13/08 ,  B60T17/00 ,  F02M26/38 ,  F02M26/40 ,  F02M26/59

Abstract: The present invention relates to an oil tank ventilation device for a hydraulic brake unit of a tramcar, comprising a vent plug, a sealing ring, a gas guide hole and a gas guide pipe; the gas guide hole is a through-hole structure arranged at an upper end inside an integrated valve block; the communications of electrical element protection case, integrated valve block and the oil tank are realized by the gas guide pipe stretched into an air chamber of the oil tank and by the vent plug configured in the electrical element protection case. When the surface of the oil tank is covered with ice or snow, the rain or snow can be effectively prevent from falling on the vent plug body and the driving safety of the train is ensured.