Hydraulic shock vibration system in multifunctional engineering equipment

The utility model provides a hydraulic impact vibration system in a multi-functional engineering equipment, and the technical problem solved by the utility model is that an excavator substrate is provided with other engineering equipment, the working head of which has multiple functions of excavating, rock drilling, frozen soil drilling and crushing, the production cost of the engineering machine can be reduced, while the working efficiency can be enhanced greatly; however, the down-the-hole drill bit needs pneumatic drive and is impacted by pneumatic drive, while the excavator can only provide hydraulic power, which becomes the bottle-neck of the device. The main point is that the utility model has the excavator substrate, and the utility model is characterized in that a guide rod of the down-the-hole drill is provided with a multi-grade promotion cylinder; the back of the hydraulic system of the excavator is provided with an air compressor, the motor of which is replaced by the hydraulic motor, and the pneu