A transmission device, comprising:
- a main bracket including a base plate and a base column, wherein the base plate is connected to one end of the base column, the base plate includes a plurality of recesses formed on a side thereof, the base column has a plurality of mounting surfaces, and the plurality of recesses and the plurality of mounting surfaces are arranged in a staggered manner;
- a pedestal mounted to another end of the base column;
- a mobile platform including a plurality of mechanical arm assemblies, wherein the plurality of mechanical arm assemblies are distributed in the plurality of recesses;
- a plurality of transmission assemblies distributed on the plurality of mounting surfaces, wherein each of the transmission assemblies is connected to an adjacent one of the mechanical arm assemblies, the plurality of mechanical arm assemblies and the plurality of transmission assemblies are arranged in a staggered manner, and each of the transmission assemblies includes:
- a fixing frame fixed to one of the mounting surfaces of the base column, wherein the fixing frame includes a first side wall, a second side wall, and a third side wall, the third side wall is connected between the first side wall and the second side wall, each of the first side wall and the second side wall has a concave portion with a through hole;
- a first transmission set disposed on the fixing frame, wherein the first transmission set includes a leadscrew and a nut that is movably disposed on the leadscrew;
- a second transmission set disposed on the fixing frame, wherein the second transmission set includes a slide rail and a slide block movably disposed on the slide rail;
- a first connecting member disposed on the nut;
- a second connecting member including a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the first connecting member, one side of the second connecting portion is connected to the slide block, and another side of the second connecting portion is connected to an adjacent one of the mechanical arm assemblies;
- and
- two side covers and two thrust bearings, wherein the two thrust bearings are respectively disposed at two ends of the leadscrew, the two side covers are respectively disposed at the two concave portions of the first side wall and the second side wall, each of the side covers has an opening, and the two openings of the side covers respectively correspond to the two through holes of the first side wall and the second side, and wherein each end of the leadscrew and the thrust bearing disposed at said end are placed in a corresponding ones of the through holes and the openings;
- and
- a plurality of motor assemblies disposed on the pedestal, wherein the plurality of motor assemblies are coupled to the plurality of transmission assemblies, respectively.