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1. 发明申请

WO1993013337A1 INFINITELY VARIABLE DIFFERENTIAL HYDROSTATIC TRANSMISSION 审中-公开
标题翻译：无限可变的差分静电传输
公开(公告)号：WO1993013337A1
公开(公告)日：1993-07-08
申请号：PCT/US1992011146
申请日：1992-12-21
申请人： DUNSTAN, Phillip, E.
IPC分类号： F16H39/10
CPC分类号： F16H61/437 , F16H39/14
摘要： An infinitely variable differential hydrostatic transmission utilizing a fixed displacement pump/motor and a variable displacement pump/motor interconnected with appropriate valving, to provide a mechanical/hydraulic differential drive which is capable of achieving an overall efficiency in the 98 DEG -99 DEG range. In the preferred embodiment, which utilizes axial piston type pump motors, pistons in multiples of four are utilized in order that each piston will have a piston located 90 DEG from it to serve as its control valve. The fixed and variable displacement motor/pump are provided as an integral unit containing bearing mountings, cylinder barrels, valve ports, piston seal mountings, hydraulic flow passages, pressure reservoirs and manifolding by forming a series of individual segments and sealing them together into a single structural unit. A unique mounting arrangement is utilized to positively attach the pistons to an anti-friction swashplate which eliminates all side loads on the piston. Finally, a novel piston valve seal reduces hydraulic leakage and sliding friction, and a novel pumping device is utilized for pressurizing the pump motor units and replacing fluid lost through leakage.
摘要翻译：使用固定排量泵/电机和与适当阀门相互连接的可变排量泵/电机的无级变速差动静液压变速器，以提供能够实现98°-99°范围内整体效率的机械/液压差速驱动。在利用轴向活塞式泵马达的优选实施例中，使用四个倍数的活塞，以使每个活塞具有位于其上90度的活塞以用作其控制阀。固定和可变排量马达/泵作为一体的单元提供，其中包含轴承安装件，气缸套，阀口，活塞密封安装件，液压流路，压力储存器和歧管，通过形成一系列单独的段并将它们一起密封成单个结构单位使用独特的安装布置来将活塞正确地附接到消除旋转斜盘的消除斜盘上的所有侧向负载。最后，一种新型的活塞阀密封件减少了液压泄漏和滑动摩擦，并且采用了一种新型的泵送装置来对泵电动机单元加压并且替换通过泄漏而损失的流体。

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