| 摘要 |
PURPOSE: A steering gear variably changes the gear ratio thereof according to a driving speed and makes easy the operation of a steering wheel so as to improve steering performance. CONSTITUTION: A steering gear(200) comprises the first hydraulic gear(201), the second hydraulic gear(202), the first circular gear(203) and the second circular gear(204). The first hydraulic gear(201) is connected with an activating shaft(210). The second hydraulic gear(202) engaged with the first hydraulic gear(201) has a different gear ratio therefrom. The first circular gear(203) is connected with the second hydraulic gear(202) by the medium of the first activated shaft(220). The second circular gear(204) engaged with the first circular gear(203) is connected with the second activated shaft(230). The gear ratio of the steering gear(200) variably changes according to driving speed and as a result makes easy the operation of a steering wheel so as to improve steering performance of a driver.
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