| 摘要 |
PROBLEM TO BE SOLVED: To achieve a structure capable of sufficiently securing sealing performance by a cap.SOLUTION: A cap 19a is constituted by a bottomed cylinder-shape cap body 20a, and a fitting core metal 44 fixed to an inner diameter side of a cap cylinder portion 22a of the cap body 20a. A bottomed cylinder-shape sensor retaining cylinder 46 formed to be opened only on an axial inner side is provided on a cap bottom portion 23a of the cap body 20a. A core metal through hole 55 is formed at a position facing an encoder 13 in an axial direction of a core metal bottom portion 54 of the fitting core metal 44. The sensor retaining cylinder 46 is inserted in a state that an intermediate portion thereof is arranged in the inner side of the core metal through hole 55. An axial outer end surface of the sensor retaining cylinder 46 is adjacently opposed to the encoder 13a in a state that an outer peripheral surface of a core metal cylinder portion 47 of the fitting core metal 44 is internally fitted and fixed directly to an axial inner end inner peripheral surface of an outer ring 2. |
