Split type oil pump chain wheel

The utility model relates to a split type oil pump chain wheel which comprises a core body, a gear ring and a pressing ring, the core body comprises a shaft sleeve for a transmission shaft to penetrate through, the lower end of the shaft sleeve is connected with an annular supporting plate, the gear ring is sleeved on the shaft sleeve and is supported by the annular supporting plate, and the pressing ring is sleeved on the shaft sleeve and presses the gear ring. A plurality of positioning through holes are formed in the disc face of the gear ring in the circumferential direction of the gear ring, upper positioning blocks matched with the positioning through holes are arranged on the lower surface of the pressing ring in the circumferential direction of the pressing ring, and the upper positioning blocks are correspondingly inserted into the positioning through holes. Lower positioning blocks matched with the positioning through holes are arranged on the upper surface of the annular supporting plate in the cir