| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gear transmission device capable of suppressing loss caused by the agitation resistance of lubricating oil by promoting the discharge of the lubricating oil. <P>SOLUTION: The gear transmission device includes a common gear 20 having two rows of internal teeth 13a, 33a axially formed adjacent to each other at the inner periphery of a common gear body 21, and each row of the internal teeth 13a, 33a is engaged with an externally toothed gear to constitute a transmission mechanism per each row. When the rotating direction of the common gear 20 with a high frequency is the normal rotation direction, each row of the internal teeth 13a, 33a is tilted toward the axial direction so that ends 13b, 33b on axially inner sides are shifted further toward the normal rotation direction more than ends 13c, 33c on the axially outer sides. An oil escape hole 25 is formed between the internal teeth 13a, 33a, and oil discharge grooves 13d, 33d are formed on tooth bottoms of the inner teeth 13a, 33a. <P>COPYRIGHT: (C)2009,JPO&INPIT |
