| 摘要 |
A wedge arrangement for affixing a tool mounting means onto a base member in such manner that substantially no wear occurs between the mounting means and base member. The mounting means has a tapered portion which is wedgingly received within a correspondingly tapered cavity provided in the base member, and that part of the base member which defines the tapered cavity completely surrounds that part of the tapered portion which is seated therein. The mounting means is also provided with a perforation or socket to receive the shank or body portion of a cutting element which has a relatively sharp cutting point or edge provided thereon. This perforation, when the mounting means tapered portion is located in the base member tapered cavity in accordance with this invention, will extend not only into the mounting means but also it may extend within the confines of the base member itself; a plunger arrangement, some times fluid actuated, acting through the wedged mounting means-base member combination, may be provided for knocking out broken cutting elements. The wedge arrangement of this invention is 360 DEG in scope and is such as to prevent relative movement between the mounting means and its base member. Supplemental elements, however, may also be employed in order to insure this. |
