Insulator and rail vehicle

The invention provides an insulator and a rail vehicle, the insulator comprises a core rod and an umbrella skirt surrounding the outer side of the core rod in the circumferential direction, a plurality of convex hulls are formed on the outer surface of the core rod, and the outer surfaces of the convex hulls are flat curved surfaces. The insulator can reduce the dirt accumulation amount and improve the safety performance. 本申请提供一种绝缘子以及轨道车辆，本申请提供的绝缘子，包括芯棒和沿周向环绕在所述芯棒外侧的伞裙，所述芯棒的外表面形成有多个凸包，所述凸包的外表面为平整的曲面。该绝缘子可以减少积污量，提高安全性能。