| 摘要 |
A speed control mechanism for model cars is disclosed. The mechanism comprises a housing and a cover, which are connectable to each other and are respectively provided with a pivot for connecting to a wheel. And, helical gears are provided on each end of the pivot so as to engage with the gear set in the housing. The gear set is composed of a positioning base and a plurality of bevel gears. By way of the engagement and transmission of the helical gears and the bevel gears, the pivots may provide excellent speed control, as well as sufficient twist force, to prevent wheels from slipping at the time of turning.
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