Modular structure and rock drill

The rock drill comprises a front guide assembly, a gearbox assembly, a buffer assembly and an impact assembly, the modular structure comprises a front guide shell and a carrier used as the front guide assembly, and a connecting structure used for being connected with the first end of the gearbox assembly is arranged at the connecting end of the front guide shell; the connecting structure is of a symmetrical structure, a flushing water flow channel is formed in the front guide shell, and a first mounting structure which communicates with the flushing water flow channel and is used for being connected with a water supply pipeline is arranged on one side of the front guide shell. No matter the rock drill is installed on the left arm or the right arm of the trolley, the first installation structure can be located on the side away from the tunnel outline by adjusting the installation position of the front guide shell, namely, the water supply pipeline is also located on the side away from the tunnel outline, then