Non-Circular Bush Insert for Anti-Rotation Electrode Assembly

The bush insert employs a non-circular outer shape (e.g., square, rectangular, or polygonal) that corresponds to the shape of the insertion hole in the electrode plate. This asymmetric geometry prevents rotational movement of the bush insert within the hole, as the shaped outer surface can only fit in one orientation. The female screw structure on the inner surface further secures the bush in place while maintaining the anti-rotation benefit of the asymmetric outer shape.

The bush insert is pre-formed with both the shaped outer surface and the female screw structure integrated into a single component. This preliminary preparation allows the bush to be directly inserted into the corresponding shaped hole in the electrode plate, where the geometry itself provides immediate anti-rotation capability. The male screw on the bush engages with the pre-formed female screw, creating secure coupling without requiring additional alignment steps or adjustment time during assembly.

The bush insert is designed as a separate, standalone component with the non-circular shape and female screw structure fully formed during its manufacturing process. This segmentation allows the bush insert to be manufactured independently using conventional machining or forming techniques, and then simply inserted into the electrode plate. The shaped outer surface and internal threading are created as integral features of the bush insert itself, avoiding the need for complex multi-step assembly processes or specialized manufacturing equipment.