Title:
RACK SHAFT AND ELECTRIC POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP2018167780
Kind Code:
A
Abstract:
To reduce the weight of a rack shaft and an electric power steering device.SOLUTION: A rack shaft 12A comprises a first shaft 110 in which a first rack 115 engaged with a first pinion 16 which rotates accompanied by the steering of a steering wheel 1 is formed, and a second shaft 120 in which a second rack 125 engaged with a second pinion 23 which rotates by an electric motor 21 is formed. An outside diameter of the first shaft 110 and an outside diameter of the second shaft 120 differ from each other. The first shaft 110 and the second shaft 120 are connected to each other by friction pressure-welding or the like. The outside diameter of the first shaft 110 to which a relatively-low load acts out of the first shaft 110 and the second shaft 120 is smaller than the outside diameter of the second shaft 120.SELECTED DRAWING: Figure 1
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Inventors:
YOSHIKAWA SANEYOSHI
MAEHARA HIDEO
SHIMODA KATSUMI
MAEHARA HIDEO
SHIMODA KATSUMI
Application Number:
JP2017068413A
Publication Date:
November 01, 2018
Filing Date:
March 30, 2017
Export Citation:
Assignee:
KYB CORP
International Classes:
B62D3/12; B62D5/04; F16H19/04
Domestic Patent References:
| JP2014046803A | 2014-03-17 | |||
| JP2014151833A | 2014-08-25 | |||
| JP2001151132A | 2001-06-05 | |||
| JP2014234882A | 2014-12-15 |
Attorney, Agent or Firm:
Goto Patent Office