Robot joint structure

A robot joint structure comprising:

• a servo comprising a servo main body and an output shaft, the output shaft comprising one end protruding out of the servo main body, and a servo plate being fixed to the output shaft and rotatable together with the output shaft;
• and
• a connection part comprising a first connection arm, and the first connection arm defining at least one connection chamber allowing the servo plate to be inserted thereinto and mating tightly with the servo plate, to fix the connection part to the servo plate;
• wherein the connection part further comprises a second connection arm and a third connection arm, the first connection arm and the third connection arm are arranged at opposite ends and at a same side of the second connection arm and extend outward, the first connection arm and the third connection arm corporately define a first space to receive the servo main body therein;
• the servo plate comprises a column and a plate that are connected to each other, and the connection chamber comprises a second space for receiving the plate and an opening for receiving the column, the second space communicates with the first space through the opening;
• the servo plate and the connection chamber are provided with a fastener assembly, the second space of the chamber is configured to prevent the plate from moving in a first direction and a second direction, and the fastener assembly is configured to prevent the column from moving in a third direction, thereby fixing the servo plate to the connection part;
• the connection chamber comprises a bottom panel, a top panel, a left panel, a right panel and a rear panel, the bottom panel, the top panel, the left panel, the right panel and the rear panel form the second space, the top panel defines the opening therein, and the fastener assembly is arranged at the column and the top panel.