Spider hydraulic motor

The utility model relates to a spider hydraulic motor, comprising a shell body 3 and a left and a right end covers 2, 7. The utility model is characterized in that a spider 6 is arranged in the shell body, and a plurality of curved surface grooves 8 are evenly distributed on the radical column surface of the spider to form a hollow cavity with definite volume. Annular low pressure liquid passages 14, low pressure liquid outlets 15, high pressure liquid passages 12 and high pressure liquid inlets 13 are arranged on the inner side surfaces of the left and the right end covers. A plurality of guide grooves 4 are arranged on the inner column surface of the shell body and evenly divide the inner column surface of the shell body in a circumferential direction into a plurality of areas which are composed of high pressure areas 9, balance transition areas 10 and liquid discharging areas 11, and the inner part of each guide groove is provided with a sliding bearing device 5. The motor has the advantages of simple structure, convenient manufacture, low cost and good combination property.