PLANETARY GEAR DEVICE AND DRIVING DEVICE FOR VEHICLE USING THE SAME

• Main Authors: YUKISHIMA MAKOTO, HIRAI ISAO
• Format: Patent
• Language: English; Japanese
• Published: 29.03.2018
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To elongate a service life of needle roller bearings 37 by improving supply of a lubricant to the needle roller bearings 37 by guiding the lubricant reaching outer peripheral faces of thrust plates 38 mounted on side faces of planetary gears P, P, into the needle roller bearings 37 rotatably supporting the planetary gears P, P.SOLUTION: The outer peripheral shape of each of thrust plates 38 is the shape formed by combining a large-diameter portion positioned at an outer diameter side with respect to an outer diameter raceway surface 37b of the needle roller bearing 37 disposed on a gear supporting shaft 33, and sliding between width surfaces of the planetary gears P, Pand carrier flanges 34a, 34b in a contact manner, and a small-diameter portion positioned at an inner diameter side with respect to the outer diameter raceway surface 37b of the needle roller bearing 37 disposed on the gear supporting shaft 33. A communication portion 38b communicated to an accommodation space of the needle roller bearing 37, is disposed between the small diameter portion of the thrust plate 38 positioned at an inner diameter side with respect to the outer diameter raceway surface 37b of the needle roller bearing 37 and the outer diameter raceway surface 37b of the needle roller bearing 37.SELECTED DRAWING: Figure 11 【課題】 遊星歯車ＰL、ＰRの側面に装着されるスラスト板３８の外周面に到達した潤滑油を、遊星歯車ＰL、ＰRを回転支持する針状ころ軸受３７内に導くことにより、針状ころ軸受３７への潤滑油供給を改善し、針状ころ軸受３７の長寿命化を図る。【解決手段】 スラスト板３８の外周形状を、歯車支持軸３３に設けられた針状ころ軸受３７の外径軌道面３７ｂよりも外径側に位置し、遊星歯車ＰL、ＰRの幅面とキャリヤフランジ３４ａ、３４ｂの幅面との間を摺接する大径部と、歯車支持軸３３に設けられた針状ころ軸受３７の外径軌道面３７ｂよりも内径側に位置する小径部との組み合わせ形状にし、針状ころ軸受３７の外径軌道面３７ｂよりも内径側に位置するスラスト板３８の小径部と針状ころ軸受３７の外径軌道面３７ｂとの間に、針状ころ軸受３７の収容空間に連通する連通部３８ｂを設けた。【選択図】 図１１