End cover assembly, air cylinder, tread cleaner and railway vehicle

An end cover assembly for sealing an air inlet end of a cylinder of a tread cleaner, comprising:

• a cylinder cover having an inner side end face disposed towards the cylinder and an outer side end face disposed away from the cylinder;
• a first external thread column body extending and protruding is provided on an inner side end face of the cylinder cover, and is mounted matching the cylinder and a second external thread column body extending and protruding is provided on an outer side end surface of the cylinder cover;
• the cylinder cover is provided with a through mounting hole extending through the first external thread column body and the second external thread column body and is used for arranging an air core and an elastic pull rod;
• and
• a gland having an inner side end face disposed towards the cylinder cover and an outer side end face disposed away from the cylinder cover, wherein, a threaded hole matching the second external thread column body is provided on the inner side end face of the gland, and a throttle air vent hole is provided between the threaded hole and the outer side end face of the gland;
• wherein, a first mounting groove is further provided between the inner side end face and the threaded hole of the gland;
• in an assembled state, the gland is assembled to the cylinder cover and pressed against the second external thread column body to enclose it by the fit between the threaded hole with the second external thread column body, and the inner side end face of the gland abuts against the outer side end face of the cylinder cover and sealing is provided via a sealing rings disposed in the first mounting groove,
• wherein, a first column body extending and protruding is provided on an inner side end face of the first external thread column body disposed towards the cylinder, diameter of the first column body being smaller than diameter of the first external thread column body;
• wherein, the first external thread column body is matched with a supporting cylinder liner of the cylinder, and the first column body is matched with a cylinder barrel of the cylinder, and
• wherein, a second mounting groove is provided between the first external thread column body and the inner side end face of the cylinder cover, and in an assembled state, sealing for the supporting cylinder liner of the cylinder and the first external thread column body is provided via a sealing ring disposed in the second mounting groove;
• and/or a third mounting groove is provided on a side wall of the first column body, and in an assembled state, sealing for the cylinder barrel of the cylinder and the first column body is provided via a sealing ring disposed in the third mounting groove.