In the groups of coal mining equipments , the roadheader has played a very important role .Nevertheless, as long as the requirement of coal becoming larger and larger and the fast rapid of mining, the partial-size tunneling roadheader has been trusted and used by the mine of home and abroad, because the partial-size tunneling roadheader has many advantages as follows: the body of roadheader is smart and suitable , it can cut out all kinds of face, it can present selective cutting, which can get a good result, it is active and effective.
The paper presents the construction designing and walk rules. In this paper, the design of the walking unit includes: driving gear, stretching wheel, heavy wheel and the reducer. In another hand , this paper make an instruction about the situations of development ,characters and further development cases of the roadheader , with this method, we can see the means of doing research about the section face roadheader.
Key words partial-size tunneling roadheader walking unit reducer