| 摘要 |
PROBLEM TO BE SOLVED: To provide an odometer for the axle in which a travel distance is precisely measured regardless of the rotary direction of a wheel and data management is facilitated. SOLUTION: An eccentric weight 5 is freely rotatably supported in the center shaft position of an axle hub H and a case 2 surrounding the eccentric weight 5 is fitted to the axle hub H and a magnet 7 is fitted to the inner peripheral face of the case 2. On the other hand, a magnetic pickup coil 8 is fitted to the eccentric weight 5 to constitute a non-contact-type counting mechanism measuring the relative number of revolution of them. The odometer is so constituted that the counted data of the counting mechanism can be transmitted.
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