| 摘要 |
PURPOSE: A differential gear device equipped with a speed changing device is provided to add a continuous speed changing function to original functions of the differential gear device through electronic control, thereby reducing the weight or volume of a power transmission device. CONSTITUTION: A key groove is formed in an inner circumference of a worm gear(7). The worm gear comprises a worm wheel ring(71) which is combined with a revolution ring board and able to move in left and right directions. A ring gear part(8) is combined in a housing with bearings(85,85a). The ring gear part is integrated with a differential gear case(81). The differential gear case forms an axis insertion outlet with a bevel gear and a hollow boss projected on a bottom diameter portion surface. |
