| US 7,513,172 B2 | ||
| Transmission apparatus | ||
| Yohei Takahashi, Nishio (Japan); Takafumi Yamada, Nishio (Japan); Yasuhiro Nitta, Nagoya (Japan); Seiji Usami, Chiryu (Japan); Akihiko Ikeda, Nishikamo-gun (Japan); and Daisuke Ido, Nagoya (Japan) | ||
| Assigned to Aisin AI Co., Ltd., Nishio-Shi, Aichi-Ken (Japan); and Toyota Jidosha Kabushiki Kaisha, Toyota-Shi, Aichi-Ken (Japan) | ||
| Filed on Jun. 08, 2006, as Appl. No. 11/448,835. | ||
| Claims priority of application No. 2005-170659 (JP), filed on Jun. 10, 2005. | ||
| Prior Publication US 2006/0278475 A1, Dec. 14, 2006 | ||
| Int. Cl. F16H 57/04 (2006.01) | ||
| U.S. Cl. 74—467 [184/6.12] | 6 Claims |
| 1. A transmission apparatus comprising:
a casing provided with shafts therein;
a rotational member positioned in the casing at an end portion in an axial direction of the shafts, the rotational member
being configured to rotate and to lift up a lubricating oil in a bottom portion of the casing so as to supply the lubricating
oil to a part that is different from the end portion inside the casing;
an oil passage provided along the axis line direction of the shafts, the oil passage configured to receive the lubricating
oil lifted up by the rotational member at a first end portion in a longitudinal direction of the oil passage and to supply
the lubricating oil through a second end portion in the longitudinal direction of the oil passage to a part inside the casing
placed far away from the rotational member, the oil passage being integrally formed with the casing; and
a final reduction gear unit provided at the end portion in the axis direction of the shafts and including a ring gear as the
rotational member, wherein
the casing is divided into a final reduction chamber placed at the end portion in the axis line direction of the shafts and
housing the ring gear therein and into a transmission chamber, in which plural pairs of shift gears are housed therein,
the transmission chamber is divided into a middle part transmission chamber and a front part transmission chamber by a transmission
chamber dividing wall, the middle part transmission chamber being placed between the front part transmission chamber and the
final reduction chamber,
the oil passage receives the lubricating oil at the first end portion in the longitudinal direction of the oil passage and
supplies the lubricating oil through the second end portion in the longitudinal direction of the oil passage to the front
part transmission chamber, and
the transmission chamber dividing wall is formed with a lower side opening at a lower end portion thereof, a dimension of
the lower side opening being narrowed down for keeping an oil level of the lubricating oil required for lubricating the shift
gears placed in the front part transmission chamber by the lubricating oil supplied into the front part transmission chamber
from the oil passage.
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