Double controlling spacing device

The utility model relates to a spacing device, particularly a double controlling spacing device suitable for hoists, lifters and cranes. The utility model comprises a box cover, a base, a worm gear, a worm gear case, a worm gear rod, a worm gear shaft, an inching switch, an inching gear, an inching internal sleeve, an inching outer sleeve, a connecting socket and a control line. The utility model is characterized in that one end of the worm screw is a flat cylindrical connecting axle head tenon inserted and fixed into the slotted hole on the connecting socket of the crane, and is connected with the main shaft of the crane. The inching switch is provided with a contact point which can contact a ring gear boss, which causes the electric controlling line to work. The purpose of spacing up and down is achieved with the power cut off. The utility model can be used extensively for lifting equipment.