公开(公告)号：US5709141A

公开(公告)日：1998-01-20

申请号：US526975

申请日：1995-09-12

申请人： Ryota Ohashi ,  Shigenori Sakikawa ,  Shinya Sakakura

发明人： Ryota Ohashi ,  Shigenori Sakikawa ,  Shinya Sakakura

IPC分类号： F04B1/20 ,  F01B3/00 ,  F04B53/00 ,  F01B3/02

CPC分类号： F01B3/0032 ,  F01B3/0044 ,  F04B1/2085 ,  F05C2201/0457 ,  F05C2201/906 ,  F05C2253/12

摘要： A variable displacement hydraulic system contains a housing, a cylinder block provided with a plurality of pistons movable in reciprocation, and a swash plate for controlling reciprocation of each of the pistons so that the swash plate is slantwise rotatable along a slidable contact surface of arcuate shape. A thrust metal is mounted to an arcuate contact surface of the housing. Arcuate plates having smooth surfaces of high sliding efficiency are fixed onto outwardly curved portions formed at the rear surface of the swash plate, which is in contact with the thrust metal. Alternatively, a smooth surface layer having a high sliding efficiency is formed on the swash plate by applying chemical processes, thereby reducing the sliding resistance of the swash plate and improving the ease with which the swash plate is restored to the neutral position.

摘要翻译： 可变排量液压系统包括壳体，设置有可往复运动的多个活塞的气缸体，以及用于控制每个活塞的往复运动的斜盘，使得斜盘沿着弓形的可滑动接触表面可倾斜旋转 。 推力金属安装在壳体的弧形接触表面上。 具有高滑动效率的光滑表面的弧形板被固定到形成在与推力金属接触的斜盘的后表面上的向外弯曲部分上。 或者，通过施加化学处理，在斜盘上形成具有高滑动效率的光滑表面层，从而降低斜盘的滑动阻力，并提高斜盘恢复到中立位置的容易性。

公开(公告)号：US5588294A

公开(公告)日：1996-12-31

申请号：US508395

申请日：1995-07-31

申请人： Shinya Sakakura ,  Ryota Ohashi ,  Shigenori Sakikawa

发明人： Shinya Sakakura ,  Ryota Ohashi ,  Shigenori Sakikawa

IPC分类号： F16H39/06 ,  F16H61/40 ,  F16H61/4017 ,  F16H61/4026 ,  F16H61/4043 ,  F16H61/4139 ,  F16D31/02 ,  F16D39/00

CPC分类号： F16H39/06 ,  F16H61/40 ,  F16H61/4017 ,  F16H61/4139 ,  F16H61/4043

摘要： A hydrostatic transmission constructed so that a check valve and a relief valve are made as compact as possible to supply oil to a closed circuit for connecting a hydraulic pump and a hydraulic motor, and to regulate maximum pressure in the closed circuit. A check valve and a relief valve are contained in a valve casing. A valve body of the relief valve is disposed opposite to a valve body of the check valve. A relief spring of the relief valve is retained by a cover detachably mounted to an open end of the valve casing, thereby facilitating pressure setting of the relief valve. The valve body of the relief valve is contained in a relief valve casing slidably disposed in the valve casing. A plunger, capable of urging the check valve in the opening direction via the relief valve casing, is provided in the cover, thereby enabling the check valve to be manually opened.

摘要翻译： 构造成使得止回阀和安全阀尽可能紧凑的静液压传动装置将油供给到用于连接液压泵和液压马达的闭路，并且调节闭路中的最大压力。 止回阀和安全阀包含在阀壳体中。 安全阀的阀体与止回阀的阀体相对设置。 安全阀的释放弹簧由可拆卸地安装到阀壳的开口端的盖保持，从而有利于安全阀的压力设定。 安全阀的阀体容纳在可滑动地设置在阀壳体中的安全阀壳体中。 能够通过安全阀壳体向止回阀向打开方向推压的柱塞设置在盖体内，能够手动打开止回阀。

公开(公告)号：US5333451A

公开(公告)日：1994-08-02

申请号：US40884

申请日：1993-03-31

申请人： Shigenori Sakikawa ,  Shinya Sakakura

发明人： Shigenori Sakikawa ,  Shinya Sakakura

IPC分类号： F16H61/40 ,  F16H61/4035 ,  F16H61/4139 ,  F16K31/06 ,  F16D31/02 ,  F16K31/12

CPC分类号： F16H61/4017 ,  F16H61/40 ,  F16H61/4139 ,  Y10T137/7781

摘要： In a valve mechanism for controlling oil pressure in an oil path (13) connecting between a hydraulic pump (11) and motor (12) of a hydrostatic transmission (10), a differential piston (23) serving as a relief valve member for gradually increasing the oil pressure has a larger pressure-applied surface area at the side opposite to the oil path than at the side of this path. A throttled oil passage (24) is provided for conducting oil pressure in the path to the larger surface area. The piston is biased by a valve spring (25) through a control piston (26). A receiving member (27) for the spring and a stopper member (28) for the control piston are provided such that they are adjustable in position independently of each other. By this, the manner of increasing the oil pressure may be adjusted in a large variety. The valve mechanism also serves as a relief valve for excluding a possible, excessively high pressure.

摘要翻译： 在用于控制连接在静液压变速器（10）的液压泵（11）和马达（12）之间的油路（13）中的油压的阀机构中，用于逐渐地用作溢流阀构件的差动活塞（23） 增加油压在与油路相反的一侧具有比在该路径侧更大的施加压力的表面积。 设有节流油路（24），用于在较大表面积的路径中导通油压。 活塞通过阀弹簧（25）通过控制活塞（26）偏压。 用于弹簧的接收构件（27）和用于控制活塞的止动构件（28）设置成使得它们彼此独立地可调节。 这样可以调节油压的增加方式。 阀机构还用作排除可能的，过高压力的安全阀。