一种用于航天器的平面四杆机构

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一种用于航天器的平面四杆机构

本发明公开了一种用于航天器的平面四杆机构，包括：导杆、连杆、滑杆、缓冲元件、滑动副、复合转动副和支座；导杆通过复合转动副与支座相连；连杆一端通过复合转动副与导杆相连，另一端通过滑动副与滑杆相连；滑杆一端通过复合转动副与支座相连，另一端与缓冲元件相连；当与导杆相连的物体正向运动时，带动连杆上的滑动副向滑杆的末端滑动，与安装在滑杆末端的缓冲元件接触后，缓冲元件发生塑性变形，吸收冲击能量；缓冲元件的反作用使滑动副有沿反向运动的趋势，滑动副与滑杆的配合面的摩擦力实现滑动副反向锁止。本发明结构简单、体积紧凑、可靠性高。

Planar four-bar mechanism for spacecraft

The invention discloses a planar four-bar mechanism for aspacecraft. The planar four-bar mechanism comprises a guide rod, a connectingrod, a sliding rod, a buffering element, a sliding pair, a composite rotatingpair and a supporting seat; the guide rod is connected with the supporting seatthrough the composite rotating pair; one end of the connecting rod is connectedwith the guide rod through the composite rotating pair, and the other end of theconnecting rod is connected with the sliding rod through the sliding pair; andone end of the sliding rod is connected with the supporting seat through thecomposite rotating pair, and the other end of the sliding rod is connected withthe buffering element. When an object connected with the guide rod movesforwards, the sliding pair on the connecting rod is driven to slide towards thetail end of the sliding rod, after the sliding pair makes contact with thebuffering element mounted at the tail end of the sliding rod, the bufferingelement generates plastic deformation, and impact energy is absorbed; andcounteraction of the buffering element makes the sliding pair have a tendencyto move in the opposite direction, and reverse locking of the sliding pair isachieved through friction force of the matching surface between the slidingpair and the sliding rod. The planar four-bar mechanism is simple in structure,compact in size, and high in reliability.