Regulatable bidirectional speed limiting device

The utility model relates to an adjustable speed limiting device of double directions, which comprises a belt pulley and a speed limiting device which are embedded on a movable pulley of a suspension cage. The utility model is characterized in that the speed limiting device comprises a small belt pulley, a swing rod arranged on the small belt pulley and a speed limiting wheel. A couple of bobs are arranged in the swing rod which is arranged in the speed limiting wheel. A spring is packaged in the front of the bob and an adjusting screw is arranged on the head and a couple of symmetrical stopping bars are arranged in the speed limiting wheel. The utility model can control the over speed of the suspension cage effectively and get various acting speeds by adopting the adjustment screw. Besides, the utility model is reasonable in design, simple in structure and low in cost, and can be connected easily with the current hoisting machine for wide spread and application.