Draw limit machine to draw synchronous revolution mechanic of side rod

The utility model discloses a draw limit machine to draw synchronous revolution mechanic of side rod, overlapping in proper order to the right side from a left side and being equipped with rotary joint, graduated disk at its inside endocentric inner tube, interior outside of tubes including outer tube and suit, rotary joint closes the left end face that is fixed in the graduated disk soon, the graduated disk right -hand member close soon be fixed in with the outer tube head, synchronous pulley, outer water jacket be equipped with from a left side to right spacer sleeve on the outer tube outer wall, the afterbody of outer tube closes soon to install and draws the end, is equipped with the support frame that a plurality of intervals set up in the annular gap between inner tube and the outer tube. The utility model discloses structural design is novel, has adopted the synchronous revolution mechanic of interior outer tube, has avoided the nylon support frame because of wearing and tearing damage, has improved the stability and the durability of drawing the side rod.