| 摘要 |
The invention relates to an auger with inner mechanism meant to be used as an active working member for hole drilling machines and borers, driven by an independent power source, such as tyred or crawled tractor, which can perform the hole drilling stage and also placing a working load at the lower limit of the hole. The auger, as claimed by the invention, consists of two cylindrical bodies (1 and 2), one body (2) being placed concentrically inside the first body, by means of two cylindrical guides (3) distributed allover the length Iof the auger, where the cylindrical body (1) is built of a pipe section with an outer diameter (D) on which the boring auger-type helical screw (16) with the outer diameter Dand the undeveloped length I, placed on the generatrix thereof is located, having at the lower part a stopping guide (10) of bush-type, provided with a thread, and the inner cylindrical body (2) is made of a pipe segment with an inner diameter Dassembled with some elastic pincers (9) having at the upper part a slideway (5) for driving in the vertical plane, provided with the articulation (6) placed on the inner body (2) and the bolt-type articulation (7) placed in a recess, which, when actuating the lever (8), allows the inner body (2) to be moved vertically, having at the lower part a spiral spring (11), the travel (h) of which is limited at the upper part by a stopper (12) made integral with the body (2) and at the lower part by the collar of the stopping guide (10), which, by the compression made by lever (8) cancels the compression of the elements of the elastic pincers (9), it has a flange (15) made integral to the diameter-reducing piece (14) which is provided with a recess of a charging hole-type, whose end is represented by the flange (13) mounted at the reduction gear box (4) of the hole drilling machine, provided with a direction reverser device. |
