Shielded electric wire and wire harness
AssigneeYazaki Corporation
InventorsMizuki SHIRAI, Hiroki KONDO, Noriyuki ABE
Life of this patent
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Abstract
A shielded electric wire includes one metal pipe and one electric wire having a conductor and an insulator. An outer diameter of the conductor at 25° C. is set as a, a coefficient of linear expansion of the conductor is set as αa, and a temperature difference between a maximum temperature and 25° C. is set as Δt, an outer diameter a′ of the conductor after thermal expansion is a′=a+αa×a×Δt, and when a wall thickness of the insulator at 25° C. is set as b and a coefficient of linear expansion of the insulator is set as αb, an insulator wall thickness b′ after thermal expansion is b′=b+αb×b×Δt, and an inner diameter c of the one metal pipe is set to satisfy c≥a′+2b′.
Claims3
A shielded electric wire comprising:
- one metal pipe having a tubular shape;
- and
- an electric wire being only one electric wire provided in the one metal pipe, and having a conductor and an insulator provided on an outer circumference of the conductor, wherein
- when an outer diameter of the conductor at 25° C. is set as a, a coefficient of linear expansion of a conductor material of the conductor is set as αa, and a temperature difference between a maximum temperature exposed in an environment where the electric wire is used and 25° C. is set as Δt, an outer diameter a′ of the conductor after thermal expansion with respect to the maximum temperature is a′=a+αa×a×Δt, and when a wall thickness of the insulator at 25° C. is set as b and a coefficient of linear expansion of an insulator material of the insulator is set as αb, an insulator wall thickness b′ after thermal expansion with respect to the maximum temperature is b′=b+αb×b×Δt, and an inner diameter c of the one metal pipe is set to satisfy c≥a′+2b′.
Dependencies are inferred from the claim text.