Portable weight lifting mechanical device

In daily life and work of people, weights are often need to be lifted from low to high (or put down from high to low), for example, loading and unloading are carried out, bricks are carried by construction workers, and the like; and most of the operations need people to lift and carry with hands and shoulders, wast time and energy and have unsafe factors at any time. In order to solve the problems, a pulley, a bracket, a cable, a rolling wheel and other accessories are combined, wherein the bracket is of a foldable (or retractable) structure, so that during hoisting work, the bracket can be conveniently unfolded, self-fixed and simply lift (or put down) the weights; and when the hoisting work is finished, a box (vehicle) of the box shape can be conveniently folded or retracted, so that carrying and moving are convenient. The device is a labor-saving machine, and can improve the work efficiency and improve the operation safety. In the specification, the specific mode of execution of thedevice is applied to the process of transferring bricks to an operating frame at a construction site, the device with the proper size is designed in a drawing, and if the device is applied, the working efficiency can be greatly improved, the labor intensity can be reduced, and the personal safety can be improved.