Parking protection and acceleration device

The invention discloses a parking protection and acceleration device. The device comprises a potentiometer, a pinion, a bull gear, a switch and an extension spring. The bull gear is a gear smaller than or equal to 1/4 . The pinion is connected with the potentiometer and engaged with the bull gear. The bull gear is cut into an inward-recessed step face. The switch is jacked by the inward-recessed step face, so that the switch is turned off or on when the bull gear rotates. The bull gear is connected with a foot rest lever and the foot rest lever is automatically rest through the extension spring after the foot rest lever is released. By the adoption of the parking protection and acceleration device, the switch is jacked by the inward-recessed step face of the bull gear, the microswitch is turned off or on when the bull gear rotates; and meanwhile the pinion is driven to rotate, the pinion drives the potentiometer to rotate to achieve acceleration or deceleration, and therefore the parking protection and accele