Mounting structure of engineering measuring instrument sopwith staff

The utility model discloses a mounting structure of engineering measuring instrument sopwith staff, it is not high to have solved the fixed back stability on the sopwith staff support of the sopwith staff among the prior art, therefore greatly influences accuracy's problem. The utility model discloses a sopwith staff adapter sleeve articulates the cradling piece that is used for sopwith staff adapter sleeve level to set up on the sopwith staff adapter sleeve, the sopwith staff adapter sleeve includes base member, sopwith staff mounting hole, spirit level and locking screw, the sopwith staff mounting hole is the rectangle, still is provided with the axis parallel arrangement's of axis and sopwith staff mounting hole cross through -hole on the base member, is provided with in the cross through -hole to lead to with cross through -hole shape assorted cross, and the cross leads to a top and/or bottom and still is provided with and keeps off, it is located the coplanar to keep off the edgeone side of the upward ne