PROBLEM TO BE SOLVED: To provide a stepless gear change device which can make a vehicle travel at a high speed without using a large-capacity hydraulic pump motor.SOLUTION: A stepless gear change device comprises: a variable capacity type first hydraulic pump motor which is rotationally driven by a drive source; a fixed capacity type hydraulic motor which constitutes a closed circuit together with the first hydraulic pump motor, and is rotationally driven by pressure oil sent from the first hydraulic pump motor; a variable capacity type second hydraulic pump motor which is connected to an oil passage for connecting the first hydraulic pump motor and the hydraulic motor, and connected to the hydraulic motor; and a changeover valve which is arranged in a portion between the hydraulic motor in the oil passage and the second hydraulic pump motor, and can switch a direction of a flow of the pressure oil.SELECTED DRAWING: Figure 1
【課題】大容量の油圧ポンプモータを用いることなく、車両を高速走行させることができる無段変速装置を提供すること。【解決手段】駆動源により回転駆動される可変容量型の第1油圧ポンプモータと、第1油圧ポンプモータと閉回路を構成し、第1油圧ポンプモータから送出された圧油により回転駆動される固定容量型の油圧モータと、第1油圧ポンプモータと油圧モータとを接続する油路に接続されるとともに、油圧モータと連結された可変容量型の第2油圧ポンプモータと、油路における油圧モータと第2油圧ポンプモータとの間の部分に設けられ、圧油の流れの方向を切り換え可能な切換弁と、を備える、無段変速装置。【選択図】図1
STEPLESS GEAR CHANGE DEVICE
無段変速装置
2018-09-27
Patent
Electronic Resource
Japanese
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