Put a combination mechanism

The utility model discloses a put a combination mechanism, including putting an axle, the integral key shaft is installed to the tip of putting an axle, and the sleeve tooth of putting on the sleeve can mesh with the ratchet teeth on the outer ratchet, and at this moment, the sleeve tooth can coincide with the ratchet teeth on the inner ratchet to push down inner ratchet, the sleeve tooth of putting on the sleeve also can mesh with the ratchet teeth on the inner ratchet, and at this moment, the sleeve tooth can coincide with the ratchet teeth on the outer ratchet, and pushes down outer ratchet. This structure can reduce the back lash between sleeve tooth and the ratchet teeth, makes the maximum deviation angle become the degree for z720 by original z360 degree. The angular discrepancy whoappears in this structure has reduced the one time than prior art, realizes putting in step of many stretch -draw muscle and opens. 本实用新型公开了种放张结合机构，包括放张轴，放张轴的端部安装有花键轴，放张套筒上的套筒齿可以与外棘轮上的棘轮齿啮合，此时，套筒齿会与内棘轮上的棘轮齿重合，并将内棘轮压下，放张套筒上的套筒