Mechanical locking structure for locomotive slot cover

The invention provides a mechanical locking structure for a locomotive slot cover. The mechanical locking structure comprises a locking pull ring (2), a lug (3), a spring base (4) and a spring (6), wherein the lug (3) is fixedly connected to a slot cover (1), the spring base (4) is fixedly connected to a slot (5), the locking pull ring (2) is movably connected with the spring base (4), the spring (6) is located below the spring base (4) and sleeved with the locking pull ring (2), and after the slot cover (1) is buckled with the slot (5), the locking pull ring (2) is pulled to slide up and down relative to the spring base (4), so that the locking pull ring (2) and the lug (3) are mutually locked or separated. By using the mechanical locking structure, the product assembly time can be greatly reduced, and the site assembly efficiency of locomotive slots and slot covers is improved; and the mechanical locking structure has the predominant advantages that the structure is simpler, the space occupied by the site c