Anti-tilting transmission mechanism for doors and windows

An anti-tilting transmission mechanism for doors and windows comprising:

• a first fixed plate (1), a second fixed plate (4) riveted with the first fixed plate (1), a transmission gear located between the first fixed plate (1) and the second fixed plate (4), and a transmission rack (9) located between the first fixed plate (1) and the second fixed plate (4), wherein:
• two guide though-holes (6) are respectively provided on two ends of the second fixed plate (4);
• two threaded columns (3), which are capable of moving back and forth, are respectively located within the two guide though-holes (6);
• two limit ribs (10) are respectively located at an outer edge of a rear end of the two threaded columns (3);
• two compression springs (2) are respectively located between the first fixed plate (1) and the two threaded columns (3);
• each of the two threaded columns (3) has a threaded hole (7) axially provided thereon, so that after passing through a door and window profile, screws are respectively tightened with the two threaded holes (7) on the two threaded columns (3), so as to fix the transmission mechanism onto the doors and windows.