Elastic positioning device of bulb-shaped cylinder guide rod type heavy load rotary disc

The utility model relates to an elastic positioning device of a bulb-shaped cylinder guide rod type heavy load rotary disc. The elastic positioning device is mainly composed of a base sleeve (12), a guide rod (3) and a spring (2). The guide rod (3) is a bulb type guide rod, the head portion of the guide rod (3) is provided with a bulb (8), a positioning step (7) capable of limiting the stroke is arranged in the middle of the guide rod (3), a cylindrical rod body is arranged at the tail of the guide rod (3), a concave cover type pressing sleeve (13) is arranged at the tail of the spring (2), and the pressure of the spring (2) can be adjusted by an adjustment screw (15) through the pressing sleeve (13). The elastic positioning device has the advantages that the structure is simple, the performance is stable, the reliability is high, and the positioning speed is high; the small bulb is adopted for the positioning end of the positioning rod, cylinder guiding is adopted for the rear side of the bulb, the positioni