Direct-drive pre-tightening mechanical connector, precast concrete pile and connecting method: Fid-Bau Portal

Direct-drive pre-tightening mechanical connector, precast concrete pile and connecting method

ZHAO MENGYAO

The invention discloses a direct-drive pre-tightening mechanical connector, a precast concrete pile and a connecting method. The connector comprises an inserting rod with an inserting head; the large nut is provided with a containing cavity; the pre-tightening nut is in threaded connection with the large nut; the clamping mechanism is arranged in the pre-tightening nut; the driving part is arranged on the outer side part, located in the containing cavity, of the pre-tightening nut and is used for being driven by the driving part from the side direction of the pre-tightening nut after the plug is inserted into the insertion cavity of the pre-tightening nut and clamped with the clamping mechanism, so that the pre-tightening nut rotates and moves in the axial direction of the large nut; and the transmission structure is used for locking the plug and the clamping mechanism in the axial direction of the large nut. According to the pre-tightening mechanical joint disclosed by the invention, a gap between the plug and the pre-tightening nut is effectively eliminated, so that when the mechanical joint is used for connecting precast concrete piles, the joints of the precast concrete piles cannot crack and generate cracks under the action of drawing force, shearing force or bending force.

本发明公开了一种直驱预紧机械接头、预制混凝土桩以及连接方法，其中接头包括，具有插头的插杆；设有容纳腔的大螺母；并与大螺母螺纹连接的预紧螺母；设于预紧螺母内卡接机构；以及设置在预紧螺母位于容纳腔的外侧部分上，用于在插头插入预紧螺母的插入腔并与卡接机构卡接后，由驱动部件从预紧螺母的侧向驱动，使得预紧螺母旋转并沿所述大螺母轴向运动，从而将插头与卡接机构在大螺母轴向方向上锁紧的传动结构。本发明公开的预紧机械接头有效的消除了插头与预紧螺母的间隙，使采用本机械接头进行预制混凝土桩连接时，在受到拉拔力、剪切力或弯曲力作用时，预制混凝土桩连接处也不会开裂并产生裂缝。

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