Equidistant displacement bridge expansion joint device

The invention belongs to the technical field of bridge expansion joints, and discloses an equidistant displacement bridge expansion joint device which comprises side edge special-shaped steel and middle special-shaped steel, a supporting cross beam is arranged under the side edge special-shaped steel and the middle special-shaped steel, stainless steel sliding rails are fixedly mounted at the top and the bottom of the supporting cross beam, and displacement boxes are movably connected to the two ends of the supporting cross beam in a sleeving manner. A stepless displacement column is arranged to be matched with a damper, so that a buffer space can be provided when the special-shaped steel performs longitudinal or transverse displacement, and when the expansion joint is subjected to torsional force and multidirectional force, the displacement column can generate relative rotation with a spherical clamping seat and a clamping seat sealing disc along with the direction of the force, stepless steering is supporte