Electric power steering device

By employing a specific reducer design and assembly sequence in the electric power steering system, the problems of gear meshing and structural complexity have been solved, resulting in smooth operation of the device, reduced noise and vibration, and miniaturization and weight reduction.

CN121843858APending Publication Date: 2026-04-10JTEKT CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-22
Publication Date
2026-04-10

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Abstract

An electric power steering device (20) is provided with a motor (22B), a speed reducer (22C), and a steering gear box (22A). The steering gear box is provided with an input shaft (61) and a first housing (41). The speed reducer has first to fourth gears (51-54), a second housing (42), and a third housing (43). The first gear is coupled to a motor shaft (22B1) and rotates about a first axis (O1), the second gear and the third gear are coupled coaxially and rotate about a second axis (O2), and the fourth gear is coupled to an axial end of the input shaft and rotates about a third axis (O3). The relative positions of the first axis (O1) and the third axis (O3) are defined by attaching the motor (22B) and the first housing (41) to the second housing (42) from the same attachment direction in the axial direction of the input shaft.
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Citation Information

Patent Citations

  • Rotary assist apparatus for recirculating ball steering gears

    US20220135118A1