Component fixing structure of pet wheel

The invention is related to a component fixing structure of pet wheel. It mainly consists of a rotor body with an assembly hole at one end and several notches around the perimeter of the hole, and an shaft core with several clips on the perimeter of the axle wall, so that the shaft core can be inserted into the assembly hole of the rotor body, and the shaft core can be rotated after the clips pass through the notches of the hole, so that the clips of the axle core can form a mismatch with the notches of the rotor body and engage with the rotor body. Accordingly, the invention can prevent the rotor body and the shaft core from loosening due to vibration and causing the roller to shake, which is beneficial to the pet's safety and stability when running or during other activities, and obtains cost savings in mold making.