JPS6425559U

JPS6425559U -

Info

Publication number: JPS6425559U
Application number: JP12044787U
Authority: JP
Priority date: 1987-08-07
Filing date: 1987-08-07
Publication date: 1989-02-13

Description

[Brief explanation of the drawing]

第１図は本考案による無段変速装置の一実施例
アイドル回転時の状態で示す縦断側面図、第２図
は同じく一部拡大図、第３図はエンジン回転上昇
時の状態を示す縦断側面図、第４図は本考案の他
の実施例を示す要部断面図である。１…駆動軸、３ａ…リジツドプーリ、３ｂ…ス
ライドプーリ、４…中心軸、５…フライウエイト
、６…サーボバルブ、７…パワーピストン、８…
ガバナスプリング、９…パワーピストンスプリン
グ、１３…パワーピストン室、１６…第１の通油
穴、１７…第２の通油穴、２０…オイル供給源、
２１…オイル導管、２８…オイル供給通路、４０
…チエツク弁、６２…オイル供給孔、７０…内筒
部、７１…外筒部。 Fig. 1 is a longitudinal side view showing an embodiment of the continuously variable transmission according to the present invention in the state of idling rotation, Fig. 2 is a partially enlarged view of the same, and Fig. 3 is a longitudinal side view showing the state as the engine speed increases. 4 are sectional views of main parts showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Drive shaft, 3a... Rigid pulley, 3b... Slide pulley, 4... Center shaft, 5... Fly weight, 6... Servo valve, 7... Power piston, 8...
Governor spring, 9... Power piston spring, 13... Power piston chamber, 16... First oil hole, 17... Second oil hole, 20... Oil supply source,
21...Oil conduit, 28...Oil supply passage, 40
...Check valve, 62...Oil supply hole, 70...Inner cylinder part, 71...Outer cylinder part.

Claims

[Claims for Utility Model Registration] A rigid pulley fixed to a drive shaft, a slide pulley displaceably fitted opposite the rigid pulley, and a center disposed in a cavity of the rigid pulley in series with the drive shaft. a shaft; a cylindrical servo valve that is slidably fitted onto the center shaft; and a cylindrical servo valve that is disposed within the cavity of the rigid pulley so as to be movable in the axial direction together with the servo valve according to the rotational speed of the drive shaft. and a power piston having an outer cylindrical portion connected to the slide pulley, the power piston having an inner cylindrical portion fitting externally to the servo valve so as to be movable relative to the servo valve, and having a convertible piston chamber inside. and is biased toward the rigid pulley via a spring, the servo valve has an oil supply hole communicating with an oil supply passage provided on the central shaft, and is biased toward the flyweight via a governor spring; The inner cylinder portion of the power piston is provided with a first oil hole that selectively communicates with the oil supply hole of the servo valve, and a second oil hole that selectively communicates with the outside of the power piston, and A continuously variable transmission characterized in that a check valve is provided in a path from an oil supply source to a first oil passage hole of the power piston, allowing flow only to the power piston chamber.