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公开(公告)号：US4884401A
公开(公告)日：1989-12-05
申请号：US238097
申请日：1988-08-30
IPC分类号： F15B20/00
CPC分类号： F15B20/00
摘要： A dual hydraulic motor system where motor wobblers are mechanically linked and the motor outputs are torque summed, is controlled by a three position dual valve assembly. Each valve assembly is controlled by pilot pistons that are mechanically linked to provide three functions, one being normal operation, a second where one motor must be shut-off and its load on the system is minimized and the third where both motors are shut-off and significant drag is then provided. These functions are implemented by a separate spool in each valve which has three independent stable positions.
摘要翻译： 机械连接电机摆动器和电机输出扭矩相加的双液压马达系统由三位双阀组件控制。 每个阀门组件由机械连接的先导式活塞控制，以提供三种功能，一种是正常操作，另一种则是一个电机必须关闭，其在系统上的负载最小化，另外一个电机关闭的第三个 然后提供显着的阻力。 这些功能由具有三个独立稳定位置的每个阀中的单独阀芯实现。
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公开(公告)号：US4867295A
公开(公告)日：1989-09-19
申请号：US147935
申请日：1988-01-25
IPC分类号： G05G5/04
CPC分类号： G05G5/04 , Y10T74/18688
摘要： A shock absorbing overtravel stop apparatus which includes a rotatable drive shaft 10, a screw shaft 15 driven by the drive shaft 10, and a nonrotatable travelling nut 30 threaded on and moveable axially along the screw shaft 15. At one end 28 of the screw shaft 15, the apparatus is provided with a rotating stop 38 and a stationery stop 40. At the other end 20 of the screw shaft 15, there is provided a bearing housing 21, journalling the screw shaft 15 for rotation and mounting the screw shaft for axial movement along the axis. The travelling nut 30 is moveable in one direction to engage the stops 38, 40 whereupon the rotary motion of the screw shaft 15 is terminated. The travelling nut 30 is also moveable in the other direction into contact with the bearing housing 21 to exert an axial force upon the screw shaft 15 such that the screw shaft 15 moves axially to engage the stops 38, 40 whereupon the rotary motion of the screw shaft 15 is terminated. The screw shaft 15 of the present invention acts as a torsion shock absorber upon the termination of the rotary motion of the screw shaft 15 by the stops 38, 40.
摘要翻译： 一种减震超程停止装置，其包括可旋转的驱动轴10，由驱动轴10驱动的螺杆轴15和螺旋在螺杆轴15上并可轴向移动的不可旋转的行进螺母30.在螺杆轴的一端28处 如图15所示，该装置设置有旋转止动件38和文具挡块40.在螺杆轴15的另一端20处，设置有轴承壳体21，轴承壳体21，用于旋转螺杆轴15并安装螺杆轴用于轴向 沿着轴的运动。 行进螺母30可以在一个方向上移动以接合止动件38,40，从而螺杆轴15的旋转运动终止。 行进螺母30也可以在另一方向上与轴承壳体21接触，以在螺杆轴15上施加轴向力，使得螺杆轴15轴向移动以接合止动件38,40，由此螺钉的旋转运动 轴15终止。 本发明的螺杆轴15在螺杆轴15由止动件38,40的旋转运动结束时用作扭转减震器。
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公开(公告)号：US4834225A
公开(公告)日：1989-05-30
申请号：US83228
申请日：1987-08-10
CPC分类号： F16D67/00 , B64C13/28 , F16D59/00 , F16H25/20 , F16H2035/005 , F16H25/2204 , Y10T74/18704
摘要： A no-back mechanism including a rotatable screw shaft 16, rotatable drive element 70 on the screw shaft 16, a limited lost motion connection 72 between the screw shaft 16 and the drive element 70, a thrust plate 28 on the screw shaft 16, first and second friction discs 30, 32 sandwiching the thrust plate 28 and being journaled by bearings 38, 40 for rotation with the thrust plate 28, first and second one way clutches 54, 56 respectively associated with the first and second friction discs 30, 32 for respectively allowing the first friction disc 30 to rotate in one direction but not the other and for allowing the second friction disc 32 to rotate in the other direction but not in the first direction, a ratchet ring 86, 88 surrounding the screw shaft 16, first and second oppositely directed pawls 104, 106 carried by the screw shaft 16 and engageable with the ratchet ring 86, 88 for preventing relative motion between the screw shaft 16 and the ratchet ring 86, 88 in the direction the associated pawl 104, 106 is directed, and a pawl operator 116 carried by the drive element 70 and operable to disengage one or the other of the pawls 104, 106 from the ratchet ring 86, 88, dependent upon the direction of rotation of the drive element 70 as the drive element 70 moves relative to the screw shaft 16 through the limited lost motion connection 72.
摘要翻译： 包括可旋转螺杆轴16，螺杆轴16上的可旋转驱动元件70，螺杆轴16和驱动元件70之间的有限的运动连接72，螺旋轴16上的推力板28， 以及夹持推力板28并由轴承38,40支承以与推力板28一起旋转的第二摩擦盘30,32，分别与第一和第二摩擦盘30,32相关联的第一和第二单向离合器54,56，用于 分别允许第一摩擦盘30在一个方向上而不是另一方向旋转，并且用于允许第二摩擦盘32沿另一方向旋转而不是在第一方向上旋转，第一摩擦圆盘32围绕螺杆轴16的棘轮环86,88 以及由螺杆轴16承载并可与棘轮环86,88配合的第二相对定向的爪104,106，用于防止螺杆轴16与棘轮环86,88之间的相对运动 定位棘爪104,106被引导，并且棘爪操作器116由驱动元件70承载并且可操作以根据驱动器的旋转方向将棘爪104,106中的一个或另一个与棘轮环86,88分离 驱动元件70通过有限的运动连接72相对于螺杆轴16移动。
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公开(公告)号：US4745815A
公开(公告)日：1988-05-24
申请号：US939407
申请日：1986-12-08
CPC分类号： F16H25/205 , B64C13/38 , B64C13/42 , F16H2025/2081 , F16H25/2454 , Y02T50/44 , Y10T74/18592 , Y10T74/19637
摘要： A non-jamming ballscrew actuator system which includes an inner screw, an intermediate ballscrew internally threaded on the inner screw, and an outer ballscrew nut rotatably mounted about the ballscrew. An actuator is operatively associated with a load to be actuated and connected to the inner screw for axial movement therewith. A drive rotates the ballscrew nut to axially move the ballscrew. A first brake prevents rotation of the ballscrew, and a second brake prevents rotation of the inner screw. In the event of jamming between the ballscrew and ballscrew nut, the first brake is released to allow the ballscrew to threadingly drive the inner screw and, thereby, move the actuator. In the event of failure of the drive, the second brake is released to allow reaction movement of the actuator means in response to load forces.
摘要翻译： 一种非干扰的滚珠丝杠致动器系统，其包括内螺纹，内螺纹内螺纹的中间滚珠丝杠和可围绕滚珠丝杠可旋转地安装的外滚珠螺母。 致动器可操作地与要被致动并连接到内螺纹的负载相关联以与其轴向移动。 驱动器旋转滚珠丝杠螺母以轴向移动滚珠丝杠。 第一制动器防止滚珠丝杠旋转，并且第二制动器防止内螺丝的旋转。 在滚珠丝杠和滚珠丝杠螺母之间卡住的情况下，释放第一制动器以允许滚珠丝杠螺纹地驱动内螺纹，从而使致动器移动。 在驱动器发生故障的情况下，第二制动器被释放以允许致动器装置响应负载力的反应运动。
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