Upper and lower limb rehabilitation and fitness training device with range capable of being adjusted in broad range

The utility model discloses an upper and lower limb rehabilitation and fitness training device with a range capable of being adjusted in a broad range. The upper and lower limb rehabilitation and fitness training device comprises a crank, a first connecting rod, a second connecting rod, a side link, a machine frame and a support. One end of the crank is in pivot joint with the machine frame to form a revolute pair, the other end of the crank is in pivot joint with the head end of the first connecting rod to form a revolute pair, the tail end of the first connecting rod is in pivot joint with the head end of the second connecting rod to form a revolute pair, the tail end of the second connecting rod is in pivot joint with the head end of the side link to form a revolute pair, and the tail end of the side link is in pivot joint with the machine frame to form a revolute pair. The support is fixedly arranged on a worm wheel of a worm wheel worm transmission device in a linkage mode, the worm wheel worm transmission device is connected to a slide block of a guide rail pair in a hinged mode, and the slide block of the guide rail pair is driven by a screw pair mounted on the first connecting rod or a screw pair mounted on the second connecting rod. The crank and the side link are driven by an upper motive power mechanism of the machine frame. The upper and lower limb rehabilitation and fitness training device with the range capable of being adjusted in the broad range is simple and compact in structure, broad in application range, capable of being grafted on other rehabilitation and fitness apparatuses, and capable of being applied to upper or lower limb rehabilitation and fitness training equipment.