The landing gear hatch lock is used to close and open the landing gear hatch. It is composed of a lock body, a connecting rod mechanism and a terminal switch mechanism. When the landing gear hatch is closed in a closed state and needs to be unlocked, the lock cylinder is "lowed down" to supply pressure. The piston rod extends outward and drives the connecting rod mechanism to act, so that the lock hook is in the open state to open the lock and hatch, and the terminal switch mechanism displays an unlocking signal: when the valve is locked, the lock body is made to "retract" the cavity. Pressure supply, the piston rod shrinks into the cylinder to the lock body. Under the external force, the hatch lock ring holds the lock hook, opens, drives the connecting rod mechanism to close the lock, and the terminal switch mechanism displays a lock signal.
The main landing gear is composed of a buffer pillar, wheel assembly, front support rod, lower lock, upper lock, wheel mechanism, retractable and release cylinder, main hatch control mechanism and main hatch, etc. The main hatch control mechanism is composed of a hatch retracting and release cylinder, a rocker arm, as well as the brittle door pull rod on both sides, and a ground unlocking connecting rod mechanism. The main landing gear and its hatch adopt a separate operation mode. During normal retraction and release, the collection and release of the main landing gear and the main hatch are controlled by their respective independent solenoid valves. The sequence of movement of the main landing gear and the main hatch is coordinated by electrical coordination control: the pressure is supplied by the No. 1 hydraulic source, and the closing of the landing gear and its hatch is realized through hydraulic action. Release.
