Driving mechanism, locking device and lock head: Fid-Bau Portal

Driving mechanism, locking device and lock head

LI BAOFU / LI QIPING / YANG SHAOHUA / HE HAIXIONG

The invention relates to the technical field of intelligent locks, in particular to a driving mechanism, a locking device and a lock head. The locking device is arranged in the lock head to be used for locking a spring bolt, the driving mechanism is used for providing driving force for the locking device, the driving mechanism comprises a screw, a motor, and a transmission part, the output end ofthe motor is connected with the screw, the transmission part sleeves the screw and is in threaded engaging with the screw, the screw rotates to drive the transmission part to axially move, when the transmission part is axially limited, the screw rotates to extrude the transmission part to radially expand open to be in separated engaging with the screw, under the general condition of the driving mechanism, the transmission part is engaged with the screw, the motor rotates to drive the transmission part to do reciprocating moving along the screw, power output is achieved, when the transmission part is blocked from moving, if the motor still does not stop rotating, the screw can exert extrusion force to the transmission part, the transmission part is extruded to be expanded open, the inner thread of the transmission part is separated from the outer thread of the screw, the screw can rotate relative to the transmission part, and the phenomenon that the motor is locked, and burning in is caused can be avoided.

本申请涉及智能锁具技术领域，具体涉及一种驱动机构、锁止装置及锁头，锁止装置设置在锁头中以用于锁止锁舌，驱动机构用于向锁止装置提供驱动力，驱动机构包括：丝杆、电机和传动件，电机输出端连接丝杆，传动件套设于丝杆且与丝杆螺纹啮合，丝杆转动能够带动传动件轴向移动，当传动件被轴向限位时，丝杆转动能够挤压传动件径向胀开，以与丝杆脱离啮合。该驱动机构在一般情况下，传动件与丝杆啮合，电机转动驱动传动件沿丝杆往复移动，实现动力输出；当传动件移动受阻时，若是电机仍未停转，丝杆能够向传动件施加挤压力，使传动件受挤压被胀开，传动件的内螺纹与丝杆的外螺纹脱离，丝杆能够相对于传动件转动，电机不会被堵转导致烧机。

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