Automatic lock for preventing self-locking of lead screw nut: Fid-Bau Portal

Automatic lock for preventing self-locking of lead screw nut

YU YALIANG

The invention discloses an automatic lock, belongs to the field of electronic locks, and aims to solve the technical problem of preventing a screw-nut pair from being locked. The door lock comprises a motor, a lock tongue, a lock plate, a lock cylinder, a door position sensor, a lock tongue position sensor, a control unit and a motor driving assembly, the motor driving assembly comprises a lead screw nut transmission pair and a nut driving lock tongue assembly meshed with a steel lead screw, a stop lever is arranged on the lead screw, and the stop lever and the lead screw are movably matched and fastened. A stop block is fixed to the nut or the spring bolt assembly, and when the nut and the spring bolt assembly move forwards to the set position, the stop block stops the stop rod on the lead screw from rotating. Due to the fact that tangential force is applied to the lead screw, the nut does not have pressing force in the axial direction, and locking of the nut is avoided. The invention has the advantages of simple structure and reliability.

一种自动锁，属于电子锁具领域，要解决的技术问题是防止丝杆螺母副锁死。它包括电机、锁舌、锁片、锁芯、门位置传感器、锁舌位置传感器、控制单元，电机驱动组件，电机驱动组件包含有丝杆螺母传动副，与钢质丝杆啮合的螺母驱动锁舌组件，此外丝杆上有一个挡杆，挡杆与丝杆活动配合并紧固，螺母或锁舌组件上固定有档块，螺母和锁舌组件前行到设定位置时，其档块阻挡丝杠上的挡杆转动。由于丝杆受到的是切向力，螺母在轴向没有压紧力，从而避免了螺母锁紧。其优点是结构简单，而且可靠。

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