Bidirectional-output multifunctional worm gear reducer

The utility model relates to a bidirectional-output multifunctional worm gear reducer, and the worm gear reducer comprises a substrate (1). The substrate (1) comprises a shaft casing (1.2), a seat ring (1.1), and an installation bottom leg, wherein the seat ring (1.1), the installation bottom leg and the shaft casing (1.2) are connected together as a body. The interior of the shaft casing (1.2) is equipped with a worm (4). One end of the seat ring (1.1) is provided with a flange cover (2). A central spindle (3) is disposed between the seat ring (1.1) and the flange cover (2). One end of the central spindle (3) passes through the center of the seat ring (1.1), and the other end of the central spindle (3) passes through the center of the flange cover (2). The center spindle (3) is provided with a gear ring fixing seat (6) which is provided with a rotation gear ring (7), and the rotation gear ring (7) is located in the seat ring (1.1). The worm gear reducer provided by the utility model is simple in structure, i