Oil cylinder barrel caging device

The utility model relates to a position limiting device for a cylinder barrel of an oil cylinder, which belongs to the technical field of an oil cylinder. Two or three grooves are arranged on the inner wall of a cylinder barrel. A position limiting ring and a slide block are arranged in the groove. A distance sleeve is arranged between each two of the position limiting rings in each of the grooves. The distance sleeve contacts tightly the two position limiting rings. The utility model has the advantages of reasonable structure and easy production manufacture. Only two or three grooves are processed on a steel pipe, therefore the processing capacity is small and the raw material is saved. The movement of the inner side of the cylinder barrel is limited in a certain range by the position limiting ring embedded into the inner wall of the cylinder barrel, therefore the position limiting performance is reliable. As the position limiting ring and the slide block are dismountable, the utility model has the advantages of convenient maintenance, low expense and long service life.