The invention discloses an upper and
lower limb fitness training device with an adjustable extensive scope, which comprises a
crank, a first connecting rod, a second connecting rod, a frame connecting rod, a framework and a support. One end of the
crank and the framework are hinged to form a first rotating pair, the other end of the
crank and the head end of the first connecting rod are hinged toform a second rotating pair, the
tail end of the first connecting rod and the head end of the second connecting rod are hinged to form a third rotating pair, the
tail end of the second connecting rodand the head end of the frame connecting rod are hinged to form a fourth rotating pair, the
tail end of the frame connecting rod and the framework are hinged to form a fifth rotating pair, the support is fixedly connected onto a worm gear of a worm gear and worm transmission, the worm gear and worm transmission is hinged on a slider of a guide track pair, the slider of the guide track pair is driven by a
helical pair mounted on the first connecting rod or the second connecting rod, and the crank and the frame connecting rod are driven by a power mechanism on the framework. The upper and lowerlimb fitness training device is simple and compact in structure and wide in application range, can be connected onto other
rehabilitation and fitness apparatuses, and can be applied to upper /
lower limb rehabilitation and fitness training devices.