Electromagnetic lock release mechanism and method for separating satellite from rocket

An electromagnetic lock release mechanism for separating a satellite from a rocket, comprising:

• a frame (1), an ejection unit, a satellite unit, a lock release unit, and a lock release drive unit;
• wherein a horizontal direction is defined as an X direction, and a vertical direction is defined as a Y direction;
• the satellite unit comprises a satellite (7), a positioning pin (8), and a satellite boss (9);
• wherein the satellite (7) is fixed to the satellite boss (9) through the positioning pin (8);
• the ejection unit is arranged below the satellite unit to provide the satellite unit with an ejection force along a positive Y direction;
• the ejection unit comprises an ejection spring (2), an ejection jack (3) and a spring sleeve (4);
• the spring sleeve (4) is fixed to the frame (1);
• the ejection spring (2) is arranged in the spring sleeve (4);
• a bottom of the ejection jack (3) is located in the spring sleeve (4) and presses against the ejection spring (2);
• a top of the ejection jack (3) passes through the spring sleeve (4) and extends to be in contact with a bottom surface of the satellite unit;
• under a locked state, the ejection spring (2) is pressed by the ejection jack (3), and the ejection spring (2) provides the satellite unit with the ejection force along the positive Y direction through the ejection jack (3);
• under a released state, with the ejection force of the ejection spring (2), the satellite unit moves in the positive Y direction, so as to be separated from the frame (1);
• the lock release unit comprises a locking pin (10), a locking slider (11), an unlocking spring (12), and a base (13);
• the base (13) is located on a left side of the satellite unit and is fixed to the frame (1);
• a right side of the base (13) has a first cavity;
• a top surface of the satellite boss (9) is an inclined surface;
• under the locked state, the locking pin (10) is partially located in the first cavity, and a cylindrical surface of the locking pin (10) presses against the inclined surface of the satellite boss (9), thereby restricting movement of the satellite boss (9) in the positive Y direction;
• the inclined surface of the satellite boss (9) also provides the locking pin (10) with a contact elastic force along a normal direction of the inclined surface;
• the contact elastic force is decomposed into a contact elastic force in the positive Y direction and a contact elastic force in a negative X direction;
• the contact elastic force in the positive Y direction presses the locking pin (10) against the base (13);
• the contact elastic force in the negative X direction presses the locking pin (10) against the locking slider (11) behind the locking pin (10);
• a left side of the base (13) has a guide groove along the Y direction, and the locking slider (11) is arranged in the guide groove to move only in the Y direction;
• the unlocking spring (12) is arranged between the locking slider (11) and the base (13) to provides the locking slider (11) with a thrust along the positive Y direction;
• a bottom part of the locking slider (11) has a cavity along the X direction;
• the locking slider (11) is located behind the locking pin (10);
• under the locked state, a plane part at a top part of the sliding block (11) presses against a rear surface of the locking pin (10);
• under the released state, the unlocking spring (12) drives the locking slider (11) to move in the positive Y direction, so that the cavity of the locking slider (11) rises;
• under the contact elastic force in the negative X direction provided by the satellite boss (9), the locking pin (10) moves along the negative X direction and enters the cavity of the locking slider (11), so that the locking pin (10) releases a movement restriction to the satellite unit;
• the lock release drive unit comprises:
• an electromagnet limit nut (14), an electromagnet moving core (15), and an electromagnet (16);
• the electromagnet (16) is fixed to the frame (1) and has a built-in coil;
• the electromagnet moving core (15) is arranged along the X direction;
• when the built-in coil of the electromagnet (16) is de-energized, a right end of the electromagnet moving core (15) presses against a top end of the locking slider (11), so as to restrict the locking slider (11) from moving in the positive Y direction;
• when the built-in coil of the electromagnet (16) is energized, the electromagnet moving core (15) moves in the negative X direction to release the locking slider (11), so that the unlocking spring (12) drives the locking slider (11) to move in the positive Y direction.