IN-WHEEL MOTOR DRIVE UNIT

• Main Author: HIRAI ISAO
• Format: Patent
• Language: English; Japanese
• Published: 23.03.2015
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To improve a lubrication performance of an outer pin 32 in an upper part of an outer pin housing 50 at an in-wheel motor drive unit 21 which employs a cycloid-type reduction gear B with respect to a needle roller bearing 55.SOLUTION: In an in-wheel motor drive unit, outer pin holding holes 54 are formed at a pair of ring parts 52 of an outer pin housing 50 so as to be coaxial with an outer pin 32, the outer pin 54 is rotatably supported by a needle roller bearing 55 assembled into the outer pin holding hole 54, and a cycloid-type reduction gear B is employed which outputs the rotation of a curved plate 31 from an output shaft 33 which is coaxial with an input shaft 30 by making the curved plate 31 eccentrically oscillate and move by the revolution of the input shaft 30. Lubricant sumps 62 continuing to outside ends of the outer pin hole 54 located at least at an upper part out of a plurality of the outer pin holes 54 which are formed in the circumferential direction of a pair of the ring parts 52 of the outer pin housing 50 are arranged at the ring parts 52 of the outer pin housing 50, and lubrication performance is improved. 【課題】 サイクロイド式の減速機Ｂを採用したインホイールモータ駆動装置２１における外ピンハウジング５０の上方にある外ピン３２の針状ころ軸受５５に対する潤滑性能を向上させることを課題とする。【解決手段】 外ピンハウジング５０の一対のリング部５２に、外ピン３２と同軸上に外ピン保持孔５４を設け、その外ピン保持孔５４内に組み込んだ針状ころ軸受５５により外ピン５４を回転自在に支持にし、入力軸３０の回転により曲線板３１を偏心揺動運動させて、その曲線板３１の自転を入力軸３０と同軸上の出力軸３３から出力するサイクロイド式の減速機Ｂを使用するインホイールモータ駆動装置において、外ピンハウジング５０の一対のリング５２部の円周方向に複数形成した外ピン保持孔５４のうち、少なくとも上部に位置する外ピン保持孔５４の外側端部に連続する潤滑油溜まり６２を外ピンハウジング５０のリング部５２に設けて、潤滑性能を向上させた。【選択図】 図２