| 摘要 |
PROBLEM TO BE SOLVED: To exercise a differential limiting effect to increase gradually, according to the rotation speed difference, by filling a viscous fluid in a space where balls move, following the rotation difference, to a differential case and a ball disk. SOLUTION: By the resistance when balls 4 roll against the viscous fluid 5, the motive power is transmitted between a differential case 1 and a ball disk 3. As a result, the motive power can be transmitted to increase gradually according to the rotating speed difference between both members. Furthermore, the viscous fluid 5 is communicated to the fluid passages 1c and 3c of the grooves 1b and 3b of the differential case 1 and the ball disk 3, following the rolling of the balls 4. Consequently, a resistance to transmit the motive power can be generated securely.
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