Guide counterweight lifting device of lorry-mounted crane

The utility model discloses a guide counterweight lifting device of a lorry-mounted crane and relates to lorry-mounted cranes Comprising a jacking support, an oil cylinder mounting base, a lifting oil cylinder and a guide shaft. An oil cylinder mounting seat and an adjusting plate are welded on a lorry-mounted crane base, a lifting oil cylinder is arranged on the oil cylinder mounting seat through an eccentric circle spacer bush, a pair of guide shafts penetrates into a guide sleeve, a nylon shaft sleeve with an oil groove is arranged in the guide sleeve, and smooth stretching and retracting of the guide shafts can be guaranteed; the jacking support is connected with the lifting oil cylinder through the pin shaft, in the lifting process, when the jacking support tends to tip over, the guide shaft can bear the counter-acting force of the guide sleeve, the stability in the balance weight lifting process is guaranteed, the oil cylinder is replaced with the guide shaft to bear force, the risk that the oil cylinde