A telescopic self-aligning structure for a shaft includes a rod, a shaft, and a self-aligning
assembly. One end of the rod has a guide hole with a limiting hole at its bottom. The shaft is located within the guide hole and includes a limiting end that slides into the limiting hole and a telescopic boss located at the opening of the guide hole. The self-aligning
assembly includes a spring, a limiting ring, and a self-aligning ring sequentially sleeved on the shaft. One end of the spring abuts against the bottom of the guide hole, and the other end abuts against one side of the limiting ring. The inner circumferential wall of the limiting ring slides with the shaft, while its outer circumferential wall has a gap with the guide hole. The inner circumferential wall of the self-aligning ring has a gap with the shaft, and its outer circumferential wall slides with the guide hole. The side of the self-aligning ring facing the limiting ring has a
conical surface, and the other side of the limiting ring abuts against the
conical surface. The side of the self-aligning ring facing away from the limiting ring abuts against the telescopic boss. This solution, by adding a self-aligning
assembly within the guide hole of the rod, ensures the concentricity of the limiting ring and the shaft relative to the guide hole.