| 摘要 |
A hub odometer having a protective case adapted to be mounted axially on an axle cap of a vehicle with a substantially cylindrical carrier plate rotatably mounted in the case for supporting a counting mechanism having figure wheels. The shaft of the figure wheels is mounted transversely of the axis of rotation of the case within the carrier plate, and a reduction gearing transfers the relative rotation of case and carrier plate to the figure wheels. At least one ball of heavy metal is provided, the ball being movably positioned in substantially diametrical opposition with respect to the case axis to the figure wheels, the ball being heavier than the counting mechanism.
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