Bidirectional thrust angular contact ball bearing with flexible time grating measuring system

A bidirectional thrust angular contact ball bearing with a flexible time grating measuring system relates to the technical field of bearings, and comprises a bearing inner ring, a bearing outer ring, a steel ball and a time grating measuring system, the bearing inner ring is composed of a first inner ring and a second inner ring which are correspondingly arranged up and down, and the lower part of the outer diameter of the first inner ring is provided with a reducing step surface; outer groove raceways are formed in the step surface and the outer circle surface of the second inner ring, two rows of inner groove raceways are arranged on the inner surface of the outer ring and correspond to the outer groove raceways on the step surface and the outer circle surface of the second inner ring respectively, and the two rows of steel balls are arranged between the two rows of inner groove raceways and the outer groove raceways respectively; the flexible time grating measuring system is an annular inductance type angu