本发明公开了一种锁用离合装置，包括：盒体和控制单元，所述盒体内设有驱动电机、蜗杆、蜗轮和锁块，所述驱动电机的输出轴传动连接蜗杆，所述蜗杆一侧啮合蜗轮，所述涡轮远离蜗杆的一侧设有锁块，所述锁块的一端设有与齿条，所述锁块远离齿条的一端设有限位套，所述控制单元电性连接驱动电机，用于控制驱动电机的工作；所述盒体靠近限位套的一端设有便于限位套伸出的第一限位孔，所述盒体靠近齿条的一端设有便于齿条伸出的第二限位孔。本发明用户通过控制单元，控制驱动电机启动带动蜗杆，蜗轮蜗杆传动，驱使锁块伸进伸出，实现解锁或上锁过程，本发明解决了现有的门锁一般都带有锁孔，这样就存在被开锁器等工具破解以及盗窃的风险的缺陷。

The clutch device for the lock comprises a box body and a control unit, a driving motor, a worm, a worm gear and a locking block are arranged in the box body, an output shaft of the driving motor is in transmission connection with the worm, one side of the worm is meshed with the worm gear, the locking block is arranged on the side, away from the worm, of the worm gear, a rack is arranged at one end of the locking block, and the rack is connected with the control unit. A limiting sleeve is arranged at the end, away from the rack, of the locking block, and the control unit is electrically connected with the driving motor and used for controlling work of the driving motor. The end, close to the limiting sleeve, of the box body is provided with a first limiting hole allowing the limiting sleeve to stretch out conveniently, and the end, close to the rack, of the box body is provided with a second limiting hole allowing the rack to stretch out conveniently. A user controls the driving motor to start through the control unit to drive the worm and the worm gear and worm to conduct transmission and drive the lock block to stretch in and stretch out, the unlocking or locking process is achieved, and the defect that an existing door lock is generally provided with a lock hole, so that the risk that the door lock is cracked by tools such as an unlocking device and the like and stolen exists is overcome.