Abstract: A rotary engaging assembly includes a first fixed seat, a second fixed seat, a movable rotatable block, and an engaging block. The second fixed seat is fixedly connected with the first fixed seat and has a protruding portion facing the first fixed seat, and the protruding portion has an engaging block accommodating space. The movable rotatable block has a perforating hole and is sleeved on the protruding portion, and the movable rotatable block has a first groove and a second groove formed at an edge of the perforating hole. The engaging block is restricted within the engaging block accommodating space and movable within the engaging block accommodating space. The engaging block can be engaged with the first groove or the second groove, and the engaging block move within the engaging block accommodating space to be engaged or disengaged with the movable rotatable block.

Abstract: An electric lifting device includes one driving mechanism and at least two transmission mechanisms, the two transmission mechanisms cooperating mutually and connected through a transmission bar assembly, with one transmission bar assembly driven by the driving mechanism. Each transmission mechanism includes a gearbox, a first driving gear, a second driving gear with axes of the first and second driving gears being crossed vertically, and lifting table legs disposed below at least two of the transmission mechanisms and driven by the second driving gear of the corresponding transmission mechanism to be lifted synchronously. The present invention employs only one driving mechanism, and with respect to the structure employing multiple driving mechanisms, the electric lifting device in the present invention can not only prevent interference to guarantee higher consistency, but also reduce devices to lower the difficult in control, thereby significantly reducing the cost.

Abstract: An electric lifting device includes one driving mechanism and at least two transmission mechanisms, the two transmission mechanisms cooperating mutually and connected through a transmission bar assembly, with one transmission bar assembly driven by the driving mechanism. Each transmission mechanism includes a gearbox, a first driving gear, a second driving gear with axes of the first and second driving gears being crossed vertically, and lifting table legs disposed below at least two of the transmission mechanisms and driven by the second driving gear of the corresponding transmission mechanism to be lifted synchronously. The present invention employs only one driving mechanism, and with respect to the structure employing multiple driving mechanisms, the electric lifting device in the present invention can not only prevent interference to guarantee higher consistency, but also reduce devices to lower the difficult in control, thereby significantly reducing the cost.

Abstract: An example of a rotary engaging assembly includes a first fixed seat, a second fixed seat, a movable rotatable block, and an engaging block is described herein. The second fixed seat is fixedly connected with the first fixed seat and has a protruding portion facing the first fixed seat, and the protruding portion has an engaging block accommodating space. The movable rotatable block has a perforating hole and is sleeved on the protruding portion, and the movable rotatable block has a first groove and a second groove formed at an edge of the perforating hole. The engaging block is restricted within the engaging block accommodating space and movable within the engaging block accommodating space. The engaging block can be engaged with the first groove or the second groove, and the engaging block move within the engaging block accommodating space to be engaged or disengaged with the movable rotatable block.