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公开(公告)号:US5320419A
公开(公告)日:1994-06-14
申请号:US613625
申请日:1991-03-16
申请人: Makoto Inagawa
发明人: Makoto Inagawa
CPC分类号: E02F9/22
摘要: A parking brake circuit for a hydraulically driven vehicle which prevents the occurrence of an erroneous operation at the time when the vehicle travels on a downward slope. The parking brake circuit comprises first and second main circuits (2, 3) for supplying hydraulic operating fluid into a hydaulically driven motor (1) for traveling the vehicle. A counterbalance valve (4) provided between these main circuits for feeding hydraulic operating fluid on the side of high hydraulic pressure into a pressure receiving chamber (6a) of a parking brake actuating actuator (6). A conduit (5) for connecting an outlet port of the counterbalance valve to the pressure receiving chamber, and a slow return valve (12) are provided in the conduit so as to control a flow of hydraulic operating fluid directed from the pressure receiving chamber to the counterbalance valve.
摘要翻译: PCT No.PCT / JP90 / 00357 Sec。 371日期1991年3月16日 102(e)1991年3月16日PCT 1990年3月16日PCT公布。 WO90 / 10757 PCT出版物 1990年9月20日,一种用于液压驱动车辆的驻车制动电路,其防止在车辆在向下的斜坡上行驶时发生错误操作。 驻车制动电路包括用于将液压工作流体供应到用于行驶车辆的水平驱动马达(1)中的第一和第二主回路(2,3)。 设置在这些主回路之间的平衡阀(4),用于将高液压侧的液压工作流体供给到驻车制动致动致动器(6)的受压室(6a)中。 用于将平衡阀的出口连接到压力接收室的导管(5)和缓慢返回阀(12)设置在导管中,以便控制从压力接收室引导的液压工作流体的流动 平衡阀。
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公开(公告)号:US5107718A
公开(公告)日:1992-04-28
申请号:US623412
申请日:1990-12-07
申请人: Makoto Inagawa
发明人: Makoto Inagawa
CPC分类号: F16H57/0412 , B60K17/046 , F03C1/0607 , F03C1/26 , F16H57/0421 , F16H57/0456 , F16H57/0486 , Y10T74/19991 , Y10T74/2189
摘要: A combined hydraulic motor and speed reducer intended to improve the service life of sealing members and bearings by cooling lubricating oil within a speed reducer case. The hydraulic motor includes a motor case (1) having a peripheral surface in which a pair of supply/discharge ports (18, 17) are formed in a diametrically opposite relationship and extend axially from one end of the motor case (1) so as to open to a speed reducer case (6). Cool lubricating oil is supplied to the interior of the speed reducer case, and at the same time, high temperature lubricating oil is discharged out of the motor. In this way, the lubricating oil within the speed reducer case is maintained at low temperature.
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