Title:
車輪支持用転がり軸受ユニット
Document Type and Number:
Japanese Patent JP6402532
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a wheel supporting rolling bearing unit which is constructed to prevent a cover from falling off one end in the axial direction of an outer ring when temperature rise in an internal space existing on the inner-diameter side of the outer ring involves pressure rise in the internal space.SOLUTION: In a cylindrical part 17a of a cover 16a at its axial intermediate portion located below a vehicle with respect to the circumferential direction in the state that a wheel supporting rolling bearing unit 1b is assembled on the vehicle, a vent hole 23 is provided while passing through the cylindrical part 17a in the radial direction. A seal lip 26 of a seal material 25 provided at the front end of the cylindrical part 17a is put in slide contact with the outer peripheral face of a shoulder part 28 of an inner ring 11 throughout its periphery. An axial distance L from the axial inner edge of the outer peripheral face of the shoulder part 28 to a slide contact area between the front edge of the seal lip 26 and the outer peripheral face of the shoulder part 28 is set longer than an axial distance d from the axial inner edge of the inner peripheral face of a knuckle pilot part 20 to an opening of the vent hole 23 (L>d).SELECTED DRAWING: Figure 2
Inventors:
Hagita Hachidai
Application Number:
JP2014165678A
Publication Date:
October 10, 2018
Filing Date:
August 18, 2014
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
International Classes:
F16C33/76; B60B35/02; F16C19/18; F16J13/14; F16J15/3204
Domestic Patent References:
| JP2013164114A | ||||
| JP2011042182A | ||||
| JP59040103U | ||||
| JP2009293651A |
Foreign References:
| US4381874 |
Attorney, Agent or Firm:
Kiwa Patent Office