| 摘要 |
A boring machine for use in mining having a base, a hydraulic motor and a cutting member. The hydraulic motor includes a pair of hydraulically activated oscillating drive units, a cylindrically shaped rotating shell, a cylindrically shaped stationary shell and a pair of cam units. The oscillating drive units are contained within the stationary shell, and extend along the longitudinal axis, each of the drive units has an arm that is adapted to extend along the longitudinal axis and a cam driver secured to the arm. The stationary shell is rotatably coupled to the rotating shell and has elongated slots adapted to coact with the cam drivers so as to longitudinally guide the cam drivers and prevent the cam drivers from rotating about the longitudinal axis. The cam units are secured to an inner surface of the rotating shell. Each cam unit is adapted to coact with a respective drive unit and includes a plurality of cams circumferentially spaced apart from each other and define cam driver paths, wherein respective ones of the cam drivers are received within the cam drive paths. The cam drive paths are arranged so that when one of the drive unit arms is in an extending mode, the other drive unit arm is in a retracting mode. The cutting member is secured to the rotating shell, whereby oscillation of the arms along the longitudinal axis causes the cam drivers to coact with respective ones of said cams along the cam drive paths causing said rotating shell and said cutting member to rotate. |
