| 摘要 |
The invention relates to an assembly comprising two roller bearings spaced apart inside a common housing, used for supporting the rotating shafts, particularly for the bicycle pedal pin. The assembly comprising two bearings supports a pin (1) provided with two runways (a and b) wherein there are placed some balls (2) held by some external rings (3 and 4). The external rings (3 and 4) are pressed into the bushings (7 and 5), which in turn, are pressed or screwed inside a housing (6). A spacer-bushing (8) is inserted between the two bearings so that, at one end, a shoulder (h) thereof protrudes into the bore of the fastening bushing (7) leaning thereagainst with a front surface (j). At the other end, a second shoulder (i) protrudes into the support bushing (5) leaning thereagainst with a front surface (k). The surface of the pin (1) and some surfaces (d and g) of the two bushings ( 5 and 7) are slot sealed.
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