Terminal box cover plate mounting and fastening device for rail transit vehicle

The utility model relates to the technical field of terminal box cover plate fastening, in particular to a terminal box cover plate mounting and fastening device for a rail transit vehicle, which comprises a total mounting frame, fastening devices are arranged at four corners of the top of the total mounting frame, each fastening device comprises a pin shaft, a through hole is formed in one side of the total mounting frame, a groove is formed in the inner side of the total mounting frame, and the pin shafts are inserted into the through holes in a penetrating manner. A pull button is arranged at one end of each pin shaft, an arc top is arranged at the other end of each pin shaft, a rigid spring sleeves the outer side of each pin shaft, cushion plates are arranged below the fastening devices, stop levers are fixed to the two adjacent sides of each cushion plate, a long through groove is formed in the position, located on one side of one corner of the main mounting frame, of each cushion plate, and a terminal c