| 摘要 |
<p>A three-section type supination plate comprises a horizontal plate, a machine frame, a swing stem, an upper reclining leg, a lower reclining leg and an elastic pull rope, wherein the machine frame comprises a longitudinal beam, a vertical bracket, a front underframe and a rear underframe; the front end of the longitudinal beam is vertically fixed in the middle of the vertical bracket; the rear end of the longitudinal beam is vertically fixed in the middle of the rear underframe; the upper end of the vertical bracket is fixed in the middle of the upper reclining leg; the lower end of the vertical bracket is fixed in the middle of the front underframe; the longitudinal beam and the vertical bracket form a triangular support; the upper end of the swing stem is hinged with the upper end of the vertical bracket; the middle of the lower reclining leg is fixed at the lower end of the swing stem; the elastic pull rope is in wire-wrap connection between the swing stem and the vertical bracket; the machine frame further comprises a swing frame and a support frame; a plurality of hinge points are arranged outside the longitudinal beam; the inner end of the swing frame is hinged at the front end of the longitudinal beam of the machine frame; the middle of the swing frame is hinged with the inner end of the support frame; the outer end of the support frame is hinged with one of the hinge points outside the longitudinal beam; and the horizontal plate is fixed on the swing frame of the machine frame.</p> |
