High-toughness mechanical joint device for robots

The invention discloses a high-toughness mechanical joint device for robots. The joint device comprises a lower joint and a servo motor; the internal of the upper end of the lower joint is movably connected with the lower end of an upper joint through a first rotating shaft; the end part of the first rotating shaft is fixedly connected with a first bevel gear; the first bevel gear is positioned atthe external of the lower joint; a second bevel gear is mounted on the edge side of the bottom of the first bevel gear, and is fixedly connected to the upper end of a second rotating shaft; and the lower end of the second rotating shaft is arranged at the top of the servo motor. The joint device is provided with a lead screw, a control rod, a movable plate and a mounting plate; through rotation of the control rod, the lead screw is separated from the movable plate and the mounting plate at the same time, so that a protective cover and the servo motor are conveniently dismounted and mounted, and the maintenance of the