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32 条记录 (耗时 0.021 秒)

    Engine-speed responsive cavitation preventing system
    5.
    发明授权
    Engine-speed responsive cavitation preventing system 失效
    发动机反应式防腐系统

    公开(公告)号：US5063741A

    公开(公告)日：1991-11-12

    申请号：US627420

    申请日：1990-12-14

    申请人： Satoshi Miyaoka

    发明人： Satoshi Miyaoka

    IPC分类号： E02F3/32 ,  E02F3/43 ,  E02F9/22 ,  F15B11/08

    CPC分类号： F15B11/08 ,  E02F9/2203 ,  E02F9/226 ,  F15B2211/30525 ,  F15B2211/329 ,  F15B2211/6313 ,  F15B2211/633 ,  F15B2211/635 ,  F15B2211/6355 ,  F15B2211/665 ,  F15B2211/67 ,  F15B2211/8609

    摘要： A hydraulic circuit suitable for use in a hydraulic operating circuit of a power shovel includes a hydraulic cylinder for driving a working component and a hydraulic change-over valve for selectively supplying the cylinder with a discharge oil pressure of a hydraulic pump driven from an engine. The hydraulic circuit prevents cavitation in an oil chamber of the cylinder and includes a pair of first signal receiving portions provided in the hydraulic change-over valve for moving the spool thereof in the forward and reverse directions away from a netural position, respectively, and a second signal receiving portion for pulling back the spool toward said neutral position. A pressure detector produces a signal commensurate with the pressure in an oil chamber of the cylinder opposing an oil chamber where vacuum pressure is developed by the weight of the working component and a signalling device produces a signal indicating the extent of pulling back the spool toward the neutral position on receipt of the results of detection by the pressure detector, thereby supplying the signal to the second signal receiving portion of the hydraulic change-over valve.

    Swing reduction gear assembly
    6.
    发明授权
    Swing reduction gear assembly 失效
    摆动减速机总成

    公开(公告)号：US5040428A

    公开(公告)日：1991-08-20

    申请号：US494314

    申请日：1990-03-16

    申请人： Satoshi Miyaoka ,  Shingo Kobayashi

    发明人： Satoshi Miyaoka ,  Shingo Kobayashi

    IPC分类号： E02F3/36 ,  E02F9/12 ,  F16C33/66 ,  F16C33/76 ,  F16J15/32

    CPC分类号： F16C33/76 ,  E02F3/36 ,  E02F9/121 ,  E02F9/126 ,  F16C33/66 ,  F16C2300/14 ,  Y10T74/19679 ,  Y10T74/19684 ,  Y10T74/19991

    摘要： A swing reduction gear assembly for a swing device which prevents admission of grease into the same and in which the pressing force of grease squeezed out from between mutually meshing teeth of a pinion and an internal gear wheel thereof is reduced. The swing reduction gear assembly comprises a lower bearing for supporting an output shaft for rotation on a casing, a sealing collar fitted on an outer periphery of the output shaft and located above a pinion integrated with the output shaft, a retainer mounted on the casing below the lower bearing, and an oil seal fitted around the retainer and normally held in engagement with an outer periphery of the sealing collar. The oil seal has a lower face side lip portion formed thereon, and a disk-shaped plate is mounted on an outer periphery of the sealing collar such that the lower face side lip portion of the oil seal is normally held in contact with an upper face of the disk-shaped plate to prevent oil from entering the swing reduction gear drive.

    摘要翻译： 一种摆动装置的摆动减速齿轮（23），其防止润滑脂进入其中并且减小从小齿轮（7）的相互啮合的齿和内齿轮（11）之间挤出的油脂的挤压力。 摆动减速齿轮包括用于支撑用于在壳体上旋转的输出轴的下轴承，安装在输出轴的外周并位于与输出轴一体的小齿轮上的密封套环（15），保持器（17） 安装在下轴承（14）下方的壳体上，以及安装在保持器周围并通常与密封套环的外周接合的油封。 油封具有形成在其上的下表面侧唇部，并且盘状板安装在密封环的外周上，使得油封的下表面侧唇部通常保持与上表面 的盘形板，以防止油脂进入摆动减速齿轮。