JPH0238552U

JPH0238552U -

Info

Publication number: JPH0238552U
Application number: JP11728688U
Authority: JP
Priority date: 1988-09-06
Filing date: 1988-09-06
Publication date: 1990-03-14

Description

[Brief explanation of drawings]

図面は本考案の実施例を示し、第１図は無段変
速機の駆動プーリ及び変速切換機構を示す断面図
、第２図は第１図の―線拡大断面図、第３図
は第２図の―線断面図、第４図はニユートラ
ル状態での可動シエイブに作用する力を示す図で
ある。４…駆動軸（回転軸）、４ｃ…平坦面、５…駆
動プーリ（可変プーリ）、６…固定シエイブ、７
…可動シエイブ、７ａ…ボス部、８…ベルト溝、
９…係合溝、１０…ピン、１２…ローラ、１３…
カム、２０…カム用ローラ、２２…Ｖベルト、２
４…傾斜面、２８…変速切換機構。 The drawings show an embodiment of the present invention; FIG. 1 is a sectional view showing the drive pulley and gear change mechanism of a continuously variable transmission; FIG. 2 is an enlarged sectional view taken along the line - - of FIG. 1; FIG. 4 is a cross-sectional view taken along the line 4 in the figure, and is a diagram showing the force acting on the movable shaft in the neutral state. 4... Drive shaft (rotating shaft), 4c... Flat surface, 5... Drive pulley (variable pulley), 6... Fixed shaft, 7
...Movable shield, 7a...Boss part, 8...Belt groove,
9...Engagement groove, 10...Pin, 12...Roller, 13...
Cam, 20...Cam roller, 22...V belt, 2
4... Inclined surface, 28... Speed change switching mechanism.

Claims

[Claims for Utility Model Registration] (1) A fixed shaft provided on at least one of a pair of rotating shafts arranged parallel to each other, and fixed to the one rotating shaft integrally and non-slidably. and a movable sheave that is rotatably and slidably supported on the rotating shaft and that forms a belt groove with a V-shaped cross section between it and the fixed sheave, and the movable sheave is fixed. This pulley-type continuously variable transmission is equipped with a speed change mechanism that changes the diameter of the pulley by moving it toward and away from the shaft, and by changing the pulley diameter of the variable pulley, the speed ratio between both rotating shafts can be changed from a low speed state to a high speed state. In the machine, a bottomed engagement groove extending parallel to the axis of the rotating shaft is formed on the inner periphery of the boss portion of the movable shaft, and a pin is protruded from the outer periphery of the rotating shaft, and the tip of the pin is formed on the outer periphery of the rotating shaft. A pulley type continuously variable transmission characterized in that a roller that rolls within the engagement groove is rotatably supported in the part. (2) The variable pulley has a neutral state in which power transmission between both rotating shafts is interrupted when the movable sheave moves from the low speed position corresponding to the variable pulley's low speed state to the side opposite to the high speed position corresponding to the high speed state. The side surface of the engagement groove of the movable sheave is pressed by a roller when driving torque is applied to the rotary shaft or the variable pulley so as to rotate the movable sheave relative to the rotary shaft when the variable pulley is in the neutral state. 2. The pulley type continuously variable transmission according to claim 1, further comprising an inclined surface for moving the movable sheave in a direction from a high speed side to a low speed side. (3) The pulley type according to claim (1) or (2), wherein the outer circumferential surface of the rotating shaft around the pin is formed into a flat surface, and the inner end of the roller is configured to come into sliding contact with the flat surface. Continuously variable transmission.