Transmission reverse gear latching mechanism

The invention discloses a reverse gear locking mechanism for a speed changer, wherein a gear selecting shaft(1) is provided with a reverse-gear safety block(2) which is provided with a torsion spring(6); the reverse gear safety block(2) can return the original position under the action of the torsion spring(6); a shell of the speed changer is fixedly provided with a baffle plate(3); when the gear selecting shaft(1) engages the reverse gear at the fifth gear, the baffle plate(3) can block the reverse-gear safety block(2), which makes the reverse gear disengaged. Due to the adoption of the structure, the speed changer can not engage the reverse gear at the fifth gear, thereby improving the driving safety.