| 摘要 |
The present invention provides a differential gear capable of differentially setting magnitudes of differential limiting forces depending on directions of rotational force transmission. In the present invention, a rotational force of the input-side rotary element (1) is transmitted by way of rolling elements (5) and grooves (3b) to the rotary elements (3). The rolling elements (5) roll along grooves (3b) of the rotary elements (3) while reciprocating within elongated holes of the retainer element, thereby permitting the difference in speeds of rotation between the rotary elements. The differential motions of the rotary elements are limited by axial reaction forces generated between the rotary elements and the grooves. At that time, if the directions of the rotational force transmission between the input-side rotary element and the rotary elements differ from each other, then the magnitudes of the axial reaction forces generated between the rotary elements and the grooves will also be different from each other. Hence, differential limiting forces are generated which differ in magnitude from one another depending on the directions of transmission of rotational forces. |
