Hydraulic coal drill with non-oil medium motor

The utility model discloses a hydraulic coal borer with a non-oil medium motor, which solves the problem of the prior art that: during the course of application of the prior art, creepage, explosion, complex application, high malfunction rate, too much dust, a necessary independent dust reducing device, and an oil medium as a must for the hydraulic motor are all disadvantages. Therefore the utility model has the advantages of simple structure, convenient application, no need of electricity, no need of additional dust reducing device, and can handle dust reducing while in application in largely improved safety. The structure of the utility model is that: a hydraulic coal borer with a non-oil medium motor comprises an aiguille; the drill spindle of the aiguille is connected with a rotor of the non-oil medium motor; the rotor is sleeved on the principal axis the non-oil medium motor; the principal axis is arranged on the machine base. The utility model is characterized in that: according to pressure balance theory, a balancing chamber is arranged on the machine base; the balancing chamber, the principal axis and the rotor are communicated with each other through a passage; at least two groups of sealing components are arranged on the principal axis, ensuring pressure balance of the fluid oil interface.