Swing pull rod structure of width fixing machine

The utility model discloses a width fixing machine swing pull rod structure which comprises a pull rod, a knuckle bearing, a pin shaft and a rack, the upper portion and the lower portion of the pin shaft are arranged in two pin holes symmetrically formed in the rack in an up-down spaced mode respectively, and the top of the pin shaft is fixedly connected with the rack. A bearing mounting hole is formed in the end part of the pull rod; a positioning step is arranged at the lower part of the bearing mounting hole; the outer ring of the knuckle bearing is mounted at the positioning step, and the inner ring is fixedly connected with the middle of the pin shaft; an upper shaft sleeve and a lower shaft sleeve are respectively arranged between the upper and lower parts of the pin shaft and the inner walls of the upper and lower pin holes of the rack; an upper end cover and a lower end cover are respectively sleeved on the outer sides of the pin shafts on the upper side and the lower side of the bearing mounting hole