Patent ID: 11904957
Assignee: HL MANDO CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A rack-driven steering device, comprising:
a ball nut coupled with a ball screw via balls and rotating to slide the ball screw;
a ball nut gear provided on an outer circumferential surface of the ball nut;
a motor gear provided on a shaft of a motor providing driving force to the ball nut and disposed in parallel with the ball screw; and
a middle gear coupled between the ball nut gear and the motor gear and transferring the driving force from the motor,
wherein the middle gear includes:
a main gear having main gear teeth formed on an outer circumferential surface thereof and engaged with gear teeth of the ball nut gear and the motor gear to transfer the driving force; and
a sub gear formed with sub gear teeth having the same shape as the main gear teeth and disposed on an axial side of the main gear to rotate in a circumferential direction of the main gear teeth, and
wherein the main gear includes:
a cylindrical cylinder part; and
a gear part having an increased diameter at a center spaced apart from two opposite axial ends of the cylinder part and having the main gear teeth formed on an outer circumferential surface thereof.