| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing unit to prevent early peeling of a bearing by eliminating static electricity generated by rotational friction of a driving unit before the rolling bearing. SOLUTION: Inner rings 1n, 2n of two rolling bearings 1, 2 installed on both ends of a housing 5 are mounted on a shaft 3 free to integrally rotate. An iron made pulley 11 of the driving unit 13 is fixed on the shaft 3, and it is connected to a driving source out of the drawing through a transmission belt 12. An electricity eliminating device E to eliminate static electricity generated in the driving unit 13 is provided in front of the rolling bearing 1 nearest to the driving unit 13 (materially on an end surface of the iron made pulley 11). This electricity eliminating device E is connected to an earth 8 by pushing a fixed contact shoe 16 on a rotating contact shoe 17 provided on an end surface of the pulley 11. Consequently, generated static electricity is eliminated, an electric potential difference between the inner ring 1n and an outer ring 1g of the rolling bearing 1 can be restrained to be less than 1V, and it is possible to improve longevity by preventing early peeling of the inner and outer rings of the rolling bearing 1.
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