Chain wheel with convertible tooth shapes

The utility model discloses a chain wheel with a convertible tooth shape, which comprises a main chain wheel, and an adjusting mechanism which is used for converting the tooth shape of the chain wheel when the chain wheel is used to form a duplex chain wheel is arranged on the main chain wheel; the adjusting mechanism internally comprises a left gear body and a right gear body which are fixedly connected to the outer ring of the main chain wheel, movable gear bodies are arranged at the middle ends of the left gear body and the right gear body, and threaded blocks are fixedly welded to the lower ends of the movable gear bodies. According to the double-row chain wheel, the adjusting mechanism is arranged in the double-row chain wheel, when the double-row chain wheel is used, the rotating disc is shifted to drive the threaded column to rotate, so that the threaded block is driven to ascend and descend, the movable gear body is pushed to ascend and descend, the tooth shape of the chain wheel is changed, and an or