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Steering device

A technology of steering device and steering shaft, which is applied in the direction of steering mechanism, steering rod, transmission device, etc., and can solve the problems of large-scale steering device, heavy load and height of the detent mechanism, etc.

Pending Publication Date: 2020-08-25
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, when the output of the motor is increased so that the steered wheels are turned to the maximum, a large load is imposed on the detent mechanism.
Therefore, in order to secure the strength, it is necessary to increase the size of the detent mechanism and to change the material. As a result, the steering device of the steer-by-wire type may become larger and more expensive.

Method used

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Examples

Experimental program
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Embodiment Construction

[0025] (1. Structure of the steering device 10)

[0026] The structure of the steering device 10 as one embodiment of the present invention will be described. Steering device 10 such as figure 1 Shown is provided with a steering shaft 11 that is coupled to left and right front wheels FW1 and FW2 as left and right steering wheels and used to steer the left and right front wheels FW1 and FW2 . Such as figure 1 and figure 2 As shown, both ends of the steering shaft 11 are connected to ball joints 12 and 13 . Further, the steering shaft 11 is connected to the left and right front wheels FW1 , FW2 via a link mechanism (for example, a tie rod) connected to the ball joints 12 , 13 .

[0027] In addition, the steering shaft 11 is accommodated in a hollow housing 14 so as to be displaceable in the axial direction. The steering shaft 11 has a first ball screw groove 11a2 as a first external thread groove formed by one of a left-hand thread and a right-hand thread in a first region...

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PUM

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Abstract

A steering device (10) is provided with: a steering shaft (11) which has a first ball screw groove (11a2) that is one of a left thread and a right thread and a second ball screw groove (11b2) that isthe other of the left thread and the right thread, and which steers a steering wheel by moving in the axial direction; a first electric motor (15) that generates a first driving force; a second electric motor (16) that operates independently of the first electric motor (15) and generates a second driving force; a first ball screw nut (17) that transmits a first driving force generated by the firstelectric motor (15) to the first ball screw groove (11a2); a second ball screw nut (18) that transmits a second driving force generated by the second electric motor (16) to the second ball screw groove (11b2); and a rotation restricting part (19) that restricts relative rotation of the steering shaft (11) about the axis with respect to a housing (14).

Description

technical field [0001] The present invention relates to steering devices. Background technique [0002] Conventionally, for example, a steering device disclosed in JP 2010-214978 A is known. This conventional steering device includes a split steering shaft that is connected to the steering wheel and used to steer the steering wheel. Steering steering control device. A conventional steering device has a slide screw mechanism including a threaded shaft portion and a slide screw nut in a relationship between left and right threads on each of the divided steering shafts. In addition, the slide screw mechanism is provided with motors that transmit driving force via output transmission mechanisms. By including such a slide screw mechanism, the conventional steering device can steer even when one of the motors fails. [0003] However, the steering device is generally capable of vertically moving the steered wheels supported by the suspension, so the steering shaft (segmented st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D6/00B62D137/00
CPCB62D5/0448B62D5/0463B62D6/001B62D5/001F16H25/24B62D5/0427F16H2025/2075F16H25/2204F16H19/04B62D3/08B62D3/12B62D5/0418B62D5/0454F16H2025/2081
Inventor 近藤美雄岸田文夫尾形俊明仲村圭史铃木博英
Owner JTEKT CORP