Rolling bearing unit
AssigneeNsk Ltd.
InventorsHiromitsu Muraki, Takafumi Yasuhara
Life of this patent
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Abstract
Two bearings 3, 4 are used to rotatably support the pivot 1 with reference to a fixed shaft. The swing arm 5 is highly precisely fixed to the pivot 1. The outer diameter 4b of the outer race 4a of the lower bearing 4 is larger than the outer diameter 3b of the outer race 3a of the upper bearing 3. The end surface of the outer race 4b of the outer race 4a of the lower bearing 4 and the outer periphery 3b of the outer race 3a of the upper ball bearing 3 are used as a reference surface to fix the swing arm 5. The housing used in the prior art is eliminated from the structure according to the present invention to reduce the number of parts.
Claims1
A rolling bearing unit comprising a pivot rotatably supported by a first and second rolling bearings in combination with reference to a fixed shaft, the first rolling bearing having a first outer race with a first material thickness, the second rolling bearing having a second outer race with a second material thickness, the first material thickness of the first outer race being greater than the second material thickness of the second outer race, so that the outer diameter of the first rolling bearing is different from the outer diameter of the second rolling bearing.
Dependencies are inferred from the claim text.