Clamp for tire uniform movement detection

The utility model discloses a fixture for tire uniform movement detection, which comprises an upper rim fixture and a lower rim fixture, a lock catch push rod is sleeved in a fixture mandrel, a spring pressure seat is arranged in an inner hole of a lifting handle on the fixture mandrel, the lock catch push rod extends into the inner hole of the lifting handle to be connected with the spring pressure seat, and a locking spring is sleeved outside the lock catch push rod. The lock catch push rod and the clamp mandrel are connected through a conical surface ratchet structure; an annular cavity and a central through hole are formed in the locking cylinder body, an annular tooth groove is formed in the hole wall of the central through hole, and a piston is arranged in the annular cavity; the piston is connected with the expansion sleeve supporting plate through a guide shaft; a return spring is arranged outside the guide shaft; a lower rim base is arranged on the locking cylinder body, a central axial hole is forme