Patent ID: 11953037
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  A  Y | IPC A  F

Claim 0:
1. A part fastening structure that fastens a part using a bolt and a nut,
wherein the bolt includes:
a first spiral groove provided on a peripheral surface of the bolt;
a second spiral groove that is provided on the peripheral surface of the bolt and that is provided on a tip end side of the bolt with respect to the first spiral groove;
a slit that is provided on the peripheral surface of the bolt along an axial direction, and that extends from a tip end of the bolt to the first spiral groove through the second spiral groove; and
a loosening suppression groove that extends from another end of the second spiral groove to the tip end side,

wherein the nut includes:
a first nut member including a first pin that protrudes from an inner peripheral surface toward a central axis side and that is inserted into the first spiral groove;
a second nut member including a second pin that protrudes from the inner peripheral surface toward the central axis side and that is inserted into the second spiral groove; and
an urging member that is disposed between the first nut member and the second nut member and that urges the first nut member toward a head portion of the bolt.