Vehicle transfer
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- TOYOTA JIDOSHA KK
- Filing Date
- 2023-02-17
- Publication Date
- 2026-06-23
AI Technical Summary
【0014】 本発明における車両用トランスファでは、遊星歯車機構を構成している回転要素のうち、走行時に回転するいずれか一つの回転要素から支持部材および外歯歯車を介してオイルポンプにトルクが伝達される。その支持部材は、前記いずれか一つの回転要素に設けられている円筒部の内周部に係脱可能に係合するフランジ部と、オイルポンプにトルクを伝達する外歯歯車を係脱可能に嵌合させる円筒状のボス部とを備え、フランジ部の外径はボス部の外径より大きくなっている。したがって、外歯歯車をボス部から取り外しておくことにより、フランジ部を前記円筒部に係合させ、かつ第1止め部材を円筒部に係合させる作業のスペースがボス部の外周側に確保される。フランジ部を円筒部すなわちいずれか一つの回転要素に組み付けた後、ボス部の外周部に外歯歯車を組み付け、かつ第2止め部材によって抜け止めする。このように、外歯歯車がフランジ部(すなわち支持部材)を円筒部(すなわちいずれか一つの回転要素)に組み付ける作業の制約要因とならないので、外歯歯車の外径を円筒部やフランジ部あるいは第1止め部材の寸法による制約を受けずに大径化することができる。オイルポンプ側から見れば、駆動側のギヤが大径化するので、オイルポンプの回転数が増大して、オイルの吐出容量を増大させることができる。
Smart Images
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Abstract
Claims
1. A vehicle transfer case comprising an oil pump that rotates by torque transmitted from a planetary gear mechanism that changes speed using at least three rotating elements, A cylindrical portion which is integral with one of the three rotating elements that rotates during travel and extends in a direction along the rotational axis of the planetary gear mechanism, It has a support member that is arranged on the same axis as the cylindrical portion and transmits torque from any one of the rotating elements to the oil pump, The aforementioned support member is The cylindrical portion has a smaller diameter than the aforementioned cylindrical portion and extends further than the cylindrical portion in the direction of the rotational axis, and the flange portion extends outward from the boss portion in the radial direction of the boss portion and is integrally formed with the boss portion and engages with the inner circumference of the cylindrical portion so as to rotate integrally with it. A first retaining member is attached to the inner circumference of the cylindrical portion to prevent the flange portion from coming off in the direction of the rotational axis. An external gear with an outer diameter greater than or equal to the inner diameter of the cylindrical portion is fitted to the portion of the outer circumference of the boss portion that extends further in the direction of the rotational axis than the cylindrical portion, so that it is integrated with the boss portion in the rotational direction and detachably fitted in the direction of the rotational axis. A second retaining member, which prevents the external gear from coming loose in the direction of the rotational axis, is attached to the outer circumference of the boss portion. The external gear is configured to transmit torque to the oil pump. A vehicle transfer case characterized by the following features.
2. A vehicle transfer case according to claim 1, The cylindrical portion and the flange portion are engaged by spline teeth. The boss portion and the external gear are engaged by other spline teeth. A vehicle transfer case characterized by the following features.
3. A vehicle transfer case according to claim 1 or 2, The first and second fastening members are snap rings. A vehicle transfer case characterized by the following features.
4. A vehicle transfer case according to claim 1 or 2, The planetary gear mechanism comprises, as its three rotating elements, a sun gear to which torque is input, a ring gear arranged concentrically with the sun gear and fixed thereto, and a carrier that supports a plurality of pinion gears that mesh with the sun gear and the ring gear so that they can rotate and revolve. Any one of the aforementioned rotating elements is the carrier. A vehicle transfer case characterized by the following features.