发明名称 |
DEVICE FOR INTERMITTENTLY SUBJECTING AXIALLY SHIFTABLE BITS OF A CUTTING HEAD TO THE ACTION OF PRESSURIZED FLUIDS |
摘要 |
The device for intermittently subjecting axially shiftable bits of a cutting head to the action of pressurized fluids comprises bit holders in which the bits are supported for a limited movement in axial direction. The bits are subjected to the action of a percussion piston which is intermittently supplied with pressurized fluid. A distributor 6 is provided for intermittently supplying pressure and includes a bushing-shaped distributing slide valve 18. The distributing slide valve 18 is provided in its mantle surface with radial perforations 22 which can be brought in alignment with passages 7 of a cutting head 3. There is provided an interpositioned gearing comprising a sun wheel 13, intermediate gear wheels 11 bearingly supported on a carrier 10 fixed for not being rotatable and a hollow gear wheel 15 non-rotatably connected with the cutting head 3. The bushing-shaped distributing slide valve 18 is non-rotatably connected with the sun wheel 13 being rotated in this manner by the cutting head 3, noting that the distributing slide valve 18 is rotated in a sense opposite to the sense of rotation of the cutting head 3. Supply of water is effected via an intermediate piece 20 into an axial water supply bolt 9 from which the water is intermittently supplied to the percussion pistons within the bit holders via the perforations 22 of the distributing slide valve 18. |
申请公布号 |
ZA8602055(B) |
申请公布日期 |
1987.01.28 |
申请号 |
ZA19860002055 |
申请日期 |
1986.03.19 |
申请人 |
VOEST-ALPINE AKTIENGESELLSCHAFT |
发明人 |
HERWIG WRULICH;FRANZ SCHOEFFMANN;WILFRIED MAIER |
分类号 |
E21C35/22;E21C25/10;E21C35/18;E21C35/187;E21C35/23 |
主分类号 |
E21C35/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|