JP2000193054A5

JP2000193054A5 -

Info

Publication number: JP2000193054A5
Application number: JP1998373169A
Authority: JP
Filing date: 1998-12-28
Publication date: 2005-07-21
Anticipated expiration: 2018-12-28

Description

トラニオン６の内側面側に回転自在に支持したパワーローラ８Ａの軸方向両端面（図１〜３の上下両端面）のうち、上記トラニオン６と反対側に存在する内端面３５の外径寄り部分を内径寄り部分よりも軸方向に凹ませる事により、この内端面３５の直径方向中間部に、段差３７を形成している。そして、この段差３７よりも内径寄り部分を、全周に亙り外径寄り部分よりも軸方向に突出した、環状凸部３８としている。尚、この環状凸部３８の外径Ｄ₃₈は、上記パワーローラ８の内径Ｒ_8Aの１．１〜１．８倍程度｛Ｄ₃₈≒（１．１〜１．８）Ｒ_8A｝に規制する。又、上記パワーローラ８Ａをトロイダル型無段変速機に組み込み、このパワーローラ８Ａの周面８ａと、入力側、出力側両ディスク２、４の内側面２ａ、４ａ（図５〜７参照）とを軽く（殆ど無負荷状態で）当接させた場合に於ける当接点Ｐ（図１０〜１１参照）が、上記周面８ａの小径側端縁よりも少し（接触楕円が内端面３５側にはみ出さない様にできる分）だけ、この周面８ａの幅方向中央寄り（トラニオン６寄り）に存在する様に、上記段差３７の高さＨ₃₇を規制する。
Of the axially end surfaces (upper and lower end surfaces of FIGS. 1 to 3) of the power roller 8A rotatably supported on the inner surface side of the trunnion 6, the outer diameter side portion of the inner end surface 35 existing on the opposite side of the trunnion 6. Is recessed in the axial direction from the portion closer to the inner diameter, so that a step 37 is formed in the middle portion in the diameter direction of the inner end surface 35. The portion closer to the inner diameter than the step 37 is an annular convex portion 38 protruding in the axial direction from the portion closer to the outer diameter over the entire circumference. The outer diameter D ₃₈ of the annular convex portion 38 is regulated to about 1.1 to 1.8 times the inner diameter R _8A _{of the power roller 8 {D 38} ≈ (1.1 to 1.8) R _8A}. To do. Further, the power roller 8A is incorporated into a toroidal continuously variable transmission, and the peripheral surface 8a of the power roller 8A and the inner side surfaces 2a and 4a of both the input side and output side discs 2 and 4 (see FIGS. 5 to 7). The contact point P (see FIGS. 10 to 11) is slightly smaller than the small diameter side edge of the peripheral surface 8a (the contact ellipse is on the inner end surface 35 side). _{The height H 37} of the step 37 is regulated so that the peripheral surface 8a exists closer to the center in the width direction (closer to the trunnion 6) only by the amount that can be prevented from protruding.