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    • 5. 发明授权
    • Linear actuator with drop prevention mechanism
    • 带防滴落机构的线性执行机构
    • US06234034B1
    • 2001-05-22
    • US09396043
    • 1999-09-15
    • Tatsuya Ando
    • Tatsuya Ando
    • F16H2520
    • F16H25/2472F16H25/20F16H2025/2081Y10T74/18792
    • A linear actuator including a mechanism for preventing accidental drop of an inner cylinder caused when a driven nut engaged with a drive screw shaft is broken. The drop prevention mechanism includes a drop prevention nut threaded with the drive screw shaft in close proximity to the driven nut, a shear pin secured at one end to one of the drop prevention nut and the inner cylinder or the driven nut, and a shear pin guide groove formed in the other of the drop prevention nut and the inner cylinder or the driven nut for slidably receiving a projecting free end portion of the shear. When the inner cylinder and the driven nut is displaced in a direction of a load acting on the inner cylinder, the shear pin is broken or sheared by engagement with an end wall of the shear pin guide groove. Upon shearing of the shear pin, the drop prevention nut supports thereon the inner cylinder or the driven nut to thereby keep the inner cylinder in position against drop.
    • 一种线性致动器,其包括用于防止当与驱动螺杆轴接合的从动螺母被破坏时引起的内筒意外下降的机构。 防落落机构包括一个与驱动螺杆轴螺纹连接的从动螺母的防落螺母,一端固定在防滴螺母和内筒或从动螺母之一的剪切销,以及剪切销 导向槽形成在防滴螺母和内筒或从动螺母中的另一个中,用于可滑动地接收剪切的突出的自由端部。 当内筒和从动螺母在作用在内筒上的负载方向上移位时,剪切销通过与剪切销引导槽的端壁接合而断裂或剪切。 在剪切销剪切时,防滴螺母在其上支撑内筒或从动螺母,从而将内筒保持在适当的位置。