Be used for articular fluid pressure type bearing of mechanical arm axle and arm

The utility model discloses a be used for articular fluid pressure type bearing of mechanical arm axle and arm, wherein, the arm includes arm axle, hydraulic power units, hydraulic directional controlvalve, the arm axle is including the axle joint that has the fluid pressure type bearing, fluid pressure type axle contracting draws together bearing inner race, bearing inner race, bearing inner race is including having annular first recess, bearing inner race imbeds in first recess, and rotates with first recess gas tightness and be connected, the terminal surface of the first end of bearing inner race is equipped with the convex second recess that distributes, and first recess bottom is equipped with the protruding muscle with second recess gas tightness looks sliding fit, and protruding muscle both ends shaping has the through -hole that is used for feeding through the hydraulic pressure oil circuit, the first end outer wall block of bearing inner race is equipped with round ball or roller between first end o