Sony Corporation

Kiyoyuki Takada

Yuji Shishido

Takeshi Kaneko

Hiroshi Sato

Kenichiro Yazawa

Yoshiaki Kakinuma

Ichiro Nakamura

Toshio Hashimoto

A bearing unit () for rotatably supporting a shaft () comprises a seamless holding member () with a gap allowing a shaft to run through and extend to the outside, a bearing () arranged in the inside of the holding member to rotatably support the shaft so as to make it radially revolvable, an anti-shaft-release member () fitted to the shaft so as to abut the bearing in order to prevent the shaft from slipping away in the thrusting direction and a space-forming member () arranged in the inside of the holding member so as to secure a space around the anti-shaft-release member. A bearing unit may further comprise an lubricating oil seal member and the space-forming member may be used to form a passage way for lubricating oil to prevent lubricating oil from leaking.

Bearing unit and rotary drive using the same

Bearing unit and rotation drive device using the same

A bearing unit comprises a shaft, a radial bearing for supporting the shaft in a peripheral rotation direction of the shaft, a thrust bearing supporting an end of the shaft in a thrust direction of the shaft, a housing made of a molded body of a synthetic resin, inside of which housing the radial bearing and the thrust bearing are arranged, the housing having a sealed configuration except for a shaft insertion hole, through which the shaft is inserted, a slip-out preventing member provided on an end side of the radial bearing at which the thrust bearing is provided, the slip-out preventing member preventing the shaft from slipping out from the radial bearing, and a viscous fluid filled in the housing. The slip-out preventing member is made of a material having a thermal deformation temperature higher than a temperature applied to the slip-out preventing member upon molding of the housing.

Bearing unit, and motor and electronic equipment, both equipped with the bearing unit

A bearing unit is provided which supports a shaft () rotatably. It includes the shaft (), a radial bearing () to support the shaft () circumferentially, a thrust bearing () to support the shaft () at one of thrusting-directional ends of the latter, a housing () having disposed therein the radial bearing () and thrust bearing () supporting together the shaft () and which is filled with a viscous fluid (), and a spacer member () disposed inside the housing () to keep a gap defined between the end face of the radial bearing () and one side of a radial projection () included in the shaft (). On the end face of the radial breading () opposite to one side of the radial projection (), there is formed a first dynamic pressure producing recess () which produces a dynamic pressure by the viscous fluid. Also, on the side of the thrust bearing () opposite to the other side of the radial projection (), there is formed a second dynamic pressure producing recess () which produces a dynamic pressure by the viscous fluid. As the shaft () rotates, the viscous fluid is circulated through the first and second dynamic pressure producing recesses () to produce a dynamic pressure between the shaft and the radial and thrust bearings, respectively. The space member () provided as above permits to control the gap between the radial projection () and first and second dynamic pressure producing recesses (), respectively, with a high accuracy.

Bearing unit, and motor using same

Growing community of inventors

Chiba, Japan

Kiyoyuki Takada