Coaxial type precision gear speed reducer

The utility model discloses a coaxial precision gear speed reducer, which relates to the field of coaxial speed reducers and comprises a machine body, first connecting shafts are fixedly connected tothe front end and the rear end of the machine body, a base is arranged at the bottom of the machine body, and an inclination angle adjusting mechanism is arranged between the base and the machine bodyand comprises two side plates. A rotating seat is fixedly connected to the center of the top of the base, and a second connecting shaft is rotatably connected to the top of the rotating seat. The inflator is connected with the air inlet pipe, air enters the air bag through the air inlet pipe, the air bag is inflated and expands upwards to jack one side of the machine body, the machine body rotates with the second connecting shaft as the center, the inclination angle of the machine body is adjusted, and the inclination angle between the machine body and the horizontal plane is within the installation requirement; and m