Fuse, motor and vehicle

The utility model discloses a fuse, a motor and a vehicle. The fuse comprises an outer shell, an inner shell, a heat conduction piece and a fuse wire, the shell encloses a first accommodating cavity; the inner shell is contained in the first containing cavity and connected with the outer shell, and the inner shell further encloses a second containing cavity; the heat conduction part is contained in the first containing cavity and connected with the inner shell, the heat conduction part has a liquid state and a solid state and can be switched between the liquid state and the solid state, or the heat conduction part has a liquid state and a gas state and can be switched between the liquid state and the gas state; and the fuse wire is accommodated in the second accommodating cavity and is connected with the inner shell. The fuse can quickly lead out heat generated by the fuse wire, and the service life of the fuse wire is prolonged. 一种熔断器、电动机和车辆，熔断器包括外壳、内壳、导热件和熔断丝；外壳围合第一容纳腔；内壳容置于所述第一容纳腔，并与所述外壳连接，所述内壳还围合第二容纳腔；导热件