| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing cap having a superior installing stability against an outer ring and tight-sealing characteristic and capable of making an air gap between an annular magnet and a magnetic sensor as less as possible.SOLUTION: This invention relates to a bearing cap 10 installed at an inner diameter part 21 of an axial opening part 20 of an outer ring at a hub bearing device 1 comprising an inner ring having an annular magnet 9 integrally installed to it, and an outer ring 2 for supporting the inner ring in such a way that it may be axially rotated so as to seal the opening part 20 under a state in which it is positioned between a magnetic sensor 30 and the annular magnet 9, the outer ring is provided with a peripheral groove 22 at its inner diameter part, there are provided a cap main body 11 and an annular seal part 12 of a resilient body fixed to an outer peripheral edge 11a of the cap main body, a radially inner portion at the outer peripheral edge part is applied as an acted part 11b of a press-in jig 40. When the press-in jig is acted on the acted part to install the bearing cap, the outer peripheral edge part 11a of the cap main body is expanded at its diameter part together with the annular seal part and it is fitted into and installed in the peripheral groove 22. |
