| 摘要 |
PCT No. PCT/EP95/02765 Sec. 371 Date Feb. 19, 1997 Sec. 102(e) Date Feb. 19, 1997 PCT Filed Jul. 14, 1995 PCT Pub. No. WO96/06708 PCT Pub. Date Mar. 7, 1996An indexing device has a first crown gear arranged on a first annular body secured to an indexing table, a second crown gear arranged on a second annular body secured to a housing, and a third crown gear arranged on an axially movable third annular body. The third crown gear can be taken out of and into engagement with the other annular crown gears by a hydraulically operable lifting and lowering device. A radial bearing supports the indexing table rotatably on the housing. The lifting device has one lifting piston which is fitted to move axially inside the housing and operates with the third crown gear. The lowering device can be hydraulically operated and has at least one hollow chamber which can be filled with fluid and is bounded on the one hand by the third crown gear. A fourth annular body engaged in an annular groove in the third annular body forms a guide for moving the third crown gear. This indexing device is compact, economical to produce, easy to fit and maintain and reliable in operation. |
