BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION

• Main Authors: FUJIKAWA KAZUTOSHI, YOSHIDA YOSHIHIRO, OKAMOTO AKIHISA
• Format: Patent
• Language: English; Japanese
• Published: 10.08.2017
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a belt type continuously variable transmission which can drive a pulley by appropriately converting turning force of a motor into thrust force of a screw shaft and has a simple structure with a small number of components.SOLUTION: In a belt type continuously variable transmission, a ball joint 13 comprises: a joint housing 25 which is installed on a screw shaft 19; and a ball stud 26 which is extended from an arm 12 and swingably supported by the joint housing 25. The ball stud 26 has: a ball shaft section 26a which has a spherical outer periphery; and a cylindrical shaft section 26b which is coaxially arranged with the ball shaft section 26a with a smaller diameter than the ball shaft section 26a and has a cylindrical outer periphery. The joint housing 25 has: a ball support face 25a which the ball shaft section 26a is fitted thereinto; and a stopper face 25b which limits a turning angle of the screw shaft 19 around an axial line X1 to a constant angle α with the same brought into contact with an outer peripheral face 26b' of the cylindrical shaft section 26b.SELECTED DRAWING: Figure 3 【課題】モータの回転力をねじ軸の推力に的確に変換してプーリを駆動することができ、且つ部品点数が少なくて構造も簡便なベルト式無段変速機を提供する。【解決手段】ボールジョイント１３は、ねじ軸１９に設けられるジョイントハウジング２５と、アーム１２から延びてジョイントハウジング２５に揺動可能に支持されるボールスタッド２６とを有し、ボールスタッド２６には、球状の外周面を有するボール軸部２６ａと、それと同軸でボール軸部２６ａの直径よりも小径且つ円筒状の外周面を有する円筒軸部２６ｂとを設け、ジョイントハウジング２５には、ボール軸部２６ａが嵌入されるボール支持面２５ａと、円筒軸部２６ｂの外周面２６ｂ′に当接してねじ軸１９の軸線Ｘ１周りの回転角度を一定角度αに規制するストッパ面２５ｂとを設けた。【選択図】 図３