Patent ID: 6575633
Filing Date: 2003-06-10
Classification: F16C,H02K

Abstract:
In a hydraulic bearing motor comprising:a shaft body having a radial shaft and a thrust shaft, the radial shaft having a plurality of dynamic pressure generating grooves being formed on an shaft surface for gathering fluid to generate a dynamic pressure in a radial direction of the shaft body, the thrust shaft having a plurality of dynamic pressure generating grooves being formed on an shaft end face for gathering fluid to generate a dynamic pressure in an axial direction of the shaft body, and the shaft body being rotated in a specified direction with the fluid made flow in the dynamic pressure generating grooves; and a shaft supporting member having a radial bearing section and a thrust bearing section, the radial bearing section supporting the radial shaft with a specified clearance being created between the shaft surface of the radial shaft and an inner wall of the radial bearing section, and the thrust bearing section supporting the thrust shaft with a specified clearance being created between the shaft end face and an inner wall of the thrust bearing section and between the shaft surface of the thrust shaft and an inner wall of the radial shaft supporting section, the improvement wherein the shaft surface of the thrust shaft is also formed with a plurality of dynamic pressure generating grooves for generating a dynamic pressure in a radial direction in the thrust bearing section.