Robot joint connecting piece

The invention provides a robot joint connecting piece. The robot joint connecting piece comprises a first rod, an end socket arranged at one end of the first rod, a connecting clamping head connectedwith the end socket, a second rod, a connecting joint, an adjusting mechanism and a servo motor, wherein the adjusting mechanism comprises a gear, an arc-shaped rack, a idler wheel, an expanding rod and a clamping rod. The connecting clamp head is slidably arranged in a first-stage arc-shaped sliding groove of the connecting joint so as to limit the movement path of the connecting clamping head. At the same time, the connection joint is further provided with a second-stage arc-shaped sliding groove, the adjusting mechanism is arranged in the second-stage arc-shaped sliding groove, and the movement position of the connection clamping head is adjusted through the gear rotation of the adjusting mechanism. In addition, the servo motor is used for driving the connection joint to rotate so as torealize multi-directional