Winding mandrel mechanism and winding machine

A winding mandrel mechanism, comprising:

• a winding pin holder;
• a set of two half winding pin assemblies disposed oppositely, wherein each of the two half winding pin assemblies comprises an outer pin and an inner clip, and the outer pin and the inner clip are mounted to the winding pin holder and movable along a radial direction of the winding mandrel mechanism;
• and
• a driving rod provided between the outer pin and the inner clip, wherein the driving rod is reciprocally movable along an axial direction of the winding mandrel mechanism, a side of the driving rod towards the outer pin cooperates with the outer pin to define a first cam structure, and a side of the driving rod towards the inner clip cooperates with the inner clip to define a second cam structure;
• wherein the driving rod is advanced along the axial direction of the winding mandrel mechanism, the outer pin is driven to move away from an axis of the winding mandrel mechanism along the radial direction of the winding mandrel mechanism by the first cam structure, and the inner clip is driven to move close to the axis of the winding mandrel mechanism along the radial direction of the winding mandrel mechanism by the second cam structure;
• wherein each of the two half winding pin assemblies further comprises a first elastic member for providing an elastic force to the outer pin, the outer pin is driven by the first elastic member to move close to the axis of the winding mandrel mechanism along the radial direction of the winding mandrel mechanism;
• wherein a spring pressing plate is fixedly provided on the winding pin holder, the first elastic member is a first spring sandwiched between the spring pressing plate and the outer pin, and the first spring drives the outer pin to move close to the axis of the winding mandrel mechanism along the radial direction of the winding mandrel mechanism.