Bearing service life testing device under vibration condition

The utility model discloses a bearing service life testing device under the vibration condition, wherein an electric motor (8), a spindle seat (10), a balance weight (3) and a bearing unit with a base(5) are arranged on the upper end surface of a machine (1); a driving wheel (7) is fixedly connected at the output shaft of the electric motor; a balance weight is supported on the machine through the spring (2) arranged beneath; the bearing unit with the base is fixed on the upper end surface of the balance weight; one end of a main shaft (14) is connected with the bearing unit with the base, and the other end thereof penetrates through the main shaft seat to be connected with a driven wheel (13); and the driving wheel and the driven wheel are connected through a high-speed tape. The utilitymodel solves the problem of testing the vibration performance of the middle support bearing unit with the base of transmission shaft for automobile, and is applicable for testing the oil leakage, service life and reliability