| 摘要 |
<p>A crank bearing unit (T) for installation in the crank bearing casing (T) of bicycles or the like, has an installation housing (1) which consists of one long flange sheath (2) and one short flange sheath (3) and is made of plastic, and ball bearings, arranged at both ends in the installation housing (1) for the crank bearing shaft (4) which penetrates the installation housing centrally. …<??>In order to obtain a crank bearing unit which is particularly simple to construct and to assemble and is yet stable, the steel bearing balls (5) extend on the outside directly on the plastic of the installation housing (1) which is provided with correspondingly made ball bearing grooves (2', 2"), in each case two ball bearing grooves (2', 2" and 4', 4") which are arranged next to one another being provided at each end of the installation housing and at the points, lying opposite one another, of the crank bearing shaft (4), which grooves form together with the bearing balls (5) running in them in each case one double ball bearing and which, furthermore, have diameters of different sizes. …<IMAGE>… </p> |
