Self-adjusting rear-protection drill rod for commercial vehicle

The utility model discloses a self-adjusting rear anti-drilling rod for a commercial vehicle. The self-adjusting rear anti-drilling rod comprises a sliding sleeve, a limiting stopper, a sliding rod, an anti-drilling rod and rollers, the height of the vehicle rear protection drill rod can be automatically adjusted according to road conditions. And the departure angle of the vehicle can be ensured on the premise of ensuring the safety of the vehicle. When the road condition is poor and the vehicle needs a large departure angle, the rolling wheels can make contact with the ground, the anti-drilling rod is pushed upwards, the anti-drilling rod can be adjusted upwards, the departure angle needed by the vehicle changes along with the change of the road condition, and the height of the anti-drilling rod can be adjusted vertically and automatically along with the change of the departure angle needed by the vehicle. When the road condition is good and the vehicle does not need a large departure angle, the anti-drillin