The mechanism of clamping with backpressure can carry out rigid self-locking connecting rod by the wedgy self-locking between the horizontal piston rod and the vertical piston rod.

• 设计了背压夹紧机构，利用水平压紧活塞杆和垂直锁紧活塞杆的楔形自锁作用达到对连杆刚性锁紧的目的；