Protection device for vehicle chassis

1. A protection device for a vehicle chassis, comprising

a beam; and

a base assembly, comprising

a beam connecting base connected to the beam and comprising a first flange plate obliquely disposed to a rear side of the beam; and

a frame connecting base, comprising:

a second flange plate, wherein a front end face of the second flange plate abuts against a rear end face of the first flange plate, and the second flange plate is connected to the first flange plate through a bolt;

a left side plate and a right side plate, wherein the left side plate and the right side plate are spaced apart and disposed to a rear end face of the second flange plate and in perpendicular to the rear end face of the second flange plate, and respectively provided with a corresponding mounting hole;

a connecting plate arranged close to front ends of the left side plate and the right side plate, wherein a left end of the connecting plate is connected to the left side plate, and a right end of the connecting plate is connected to the right side plate; and

a bearing member provided to the rear end face of the second flange plate and located between the left side plate and the right side plate.

2. The protection device according to claim 1 , wherein the front end face of the second flange plate has a protruding positioning pin, and the rear end face of the first flange plate is provided with a recessed portion matching the positioning pin.

3. The protection device according to claim 1 , wherein the connecting plate comprises:

a body portion; and

a left flanging and a right flanging, wherein the left flanging is bent backwards and connected to the left side plate, and the right flanging is bent backwards and connected to the right side plate.

4. The protection device according to claim 1 , wherein the bearing member has a U-shaped cross section, and an opening end connected to the rear end face of the second flange plate.

5. The protection device according to claim 1 , wherein the beam connecting base further comprises:

a left upright plate and a right upright plate spaced apart from each other, and disposed to a front end face of the first flange plate and in perpendicular to the front end face of the first flange plate; and

a reinforcing grooved plate, wherein a rear end of the grooved plate is connected to the left upright plate and the right upright plate, and a front end of the grooved plate is provided with a mounting groove for mounting the beam.

6. The protection device according to claim 1 , wherein a plurality of base assemblies are provided.

7. The protection device according to claim 1 , wherein a hook is provided at respective upper ends of the left upright plate and the right upright plate and configured to match an upper end of the second flange plate.

8. The protection device according to claim 7 , wherein the left upright plate and the right upright plate are both provided with at least two hooks.

9. The protection device according to claim 1 , wherein the beam comprises:

a first channel steel;

a second channel steel; and

a third channel steel;

wherein an opening of the first channel steel corresponds to and is welded to an opening of the second channel steel, an opening end of the third channel steel is welded to an internal bottom wall of the first channel steel, and an external bottom wall of the third channel steel is welded to an internal bottom wall of the second channel steel.

10. The protection device for the vehicle chassis according to claim 9 , wherein an opening of the third channel steel gradually enlarges upwards from a bottom portion thereof.