Shell structure for radial plunger motor, sand mold and radial plunger motor

The present application provides a housing structure for a radial plunger motor a sand mold and a radial plunger motor, the shell structure is integrally formed with a high-pressure oil hole, a low-pressure oil hole, a plurality of flow distribution runners and an annular runner connecting the high-pressure oil hole and the low-pressure oil hole with the flow distribution runners; the shell structure is also provided with a sand core supporting hole, the outer side of at least one annular runner in the radial direction is communicated with the sand core supporting hole, to support the annular runner core during casting by supporting the core to form the core support holes. According to the technical scheme, through the arrangement of the sand core supporting holes, the annular runner sand core can be supported by the supporting sand core when the shell structure is cast, so that the strength of the annular runner sand core is improved, and the casting success rate is improved.