The utility model provides a be equipped with on the outer wall with limiting plate assorted guide block, it is vice to be equipped with direction friction between limiting plate and the guide block that can assembled spherical support, the support is equipped with the limiting plate by the supreme and seat of honour base plate that sets gradually down, well bedplate, bedplate down on the bottom surface of seat of honour base plate, bedplate under seat of honour base plate be a complete flat board, lower bedplate be the round platform structure, in the relative both sides of seat of honour base plate bottom surface or fixed respectively set up a detachable limiting plate all around, in the both sides of bedplate down or fix respectively all around and set up a detachable guide block. The utility model provides the high efficiency of making, the vice operational aspect of direction friction is convenient for observe by the support run duration.