Design of the self-locking device of the automatic hot-pressing machine

1、 Self-locking device of disc spring of tensile structure hot press
Belleville spring self-locking device. The utility model has an auxiliary hydraulic cylinder specially designed for locking, and the auxiliary hydraulic cylinder is in series with the main hydraulic cylinder. Lock sleeve 1, disc spring 2, lock piston 3 and lock piston 4 are installed on the piston of the main hydraulic cylinder. When it is necessary to lock the cylinder, chamber a is filled with high-pressure oil. Move the locking piston to both sides, press the belleville spring 2, and clamp the locking sleeve 1 on the piston rod. When the piston rod needs to move, the cavity oil will be sent directly to the oil tank, and the coil spring can be released after resetting. Belleville spring self-locking device locks the piston no matter where the cylinder moves.
Oil pressure ripple bead self-locking die
Ball self-locking device. On both sides of the piston, 8-12 balls 4 are confined in the annular sleeve. When the piston moves to the rightmost position, under the action of spring 1, the sliding sleeve 2 pushes the ball into the ring groove of ring 3 to fix the piston in place. When it is necessary to release, the pressure oil flows into chamber A. The sliding sleeve 2 compresses the spring 1 under the action of hydraulic pressure to make the ball 4 disengage from the ring groove of the ring 3. The pressure oil pushes the piston to move to the left. This self-locking device can only be installed at both ends of the hydraulic cylinder.
3、 Self-locking device of tongue of hot press with tensile structure
Tongue device. When the piston 1 moves to the right as the tongue spring 2 moves to the end, the retainer 3 pressed by the spring 4 opens the tongue spring 2 and locks it on the cylinder wall with an outer conical surface. When released, the pressure oil is introduced into the chamber a, and the sliding sleeve 3 compresses the spring 4 to move to the right through hydraulic pressure, and the piston 1 and the spring 2 move to the left together. This structure can only lock itself in the terminal.