Based on the characteristics of partial loading and support modes

afinite element analysis model of roller needle bearing fully considering the flexible structure influence of the cam and pin was established. Then

the influences of bearing load

radial clearance and installation misalignment angle on the mechanical property

stiffness and life of the bearing were analyzed systematically

and the correctness of the simulation results was verified by numerical and experimental methods. Results show that the radial load and installation misalignment angle have great influence on the contact performance and service life of bearings under partial loading conditions

while the clearance of bearings has little effect on the contact performance and service life of bearings; the increase of radial load and installation misalignment angle makes the bearing area smaller

and the original symmetrical contact pressure distribution pattern “hump” of the needle generatrix is gradually shifting to the deflection angle

resulting in the pressure distribution pattern of “one high one low”; the maximum contact pressure increases

and the bearing life decreases rapidly. However

under the conditions of limit load and installation misalignment angle

the service life index still meets the bearing design requirements.