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Shock-absorbing steering device

A steering device and shock absorption technology, applied in the steering column, steering control, steering mechanism, etc., can solve the problems of limited degree of freedom, inability to reduce torque, increased cost, etc., to improve shock absorption performance, easy and stable absorption, The effect of stable absorption

Active Publication Date: 2012-05-02
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, if Figure 25 ~ Figure 26 As shown, with the structure in which the energy absorbing member 36 is provided between the steering column 6b and the vehicle body 37 provided on the upper side of the steering column 6b, the above-mentioned moment cannot be reduced, and the instability of the energy absorbing performance cannot be prevented.
In other words, in Figure 25 ~ Figure 26 In the structure shown, when it is desired to suppress the above-mentioned moment to a small value and prevent instability of the energy absorption performance, the structure in which the fastening rod 27 is arranged on the lower side of the steering column cannot be adopted, and the degree of freedom of design is limited.
Moreover, in Figure 25 ~ Figure 26 In the structure shown, the support pin 38 and the holding case 39 are required as dedicated parts for installing the energy absorbing member 36, so the cost increase cannot be avoided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0080] refer to Figure 1 to Figure 9 An example of the first embodiment of the present invention will be described. The impact-absorbing steering device of this example includes: an inner column 14a; an outer column 13a; a steering shaft 5b; a pair of clamped wall portions 11a; a pair of front and rear direction long holes 28; a support bracket 10a; The direction long holes 26a, 26b; the fastening rod 27a; the cam device 32a constituting the fixing mechanism; and, the energy absorbing member 36a. However, in the definition of the present invention, the long hole 28 in the front-rear direction corresponds to the first through hole, and the long holes 26a, 26b in the vertical direction correspond to the second through hole. The shapes of these first and second through holes can be changed depending on whether the steering device is equipped with a telescoping mechanism and / or a tilting mechanism. In a configuration that does not include these mechanisms, for example, one or b...

no. 2 Embodiment approach

[0108] refer to Figure 10 ~ Figure 19 A second embodiment of the present invention will be described. The impact-absorbing steering device of the second embodiment differs from the first embodiment only in the structure for absorbing the impact energy at the time of the secondary collision, that is, the structure of the energy absorbing member. Therefore, the description of the same structure as the first embodiment is omitted or simplified, and the energy absorbing member which is the characteristic part thereof will be described below. In addition, the description of this example is also based on the structure in which the tightening rod is arranged below the outer column, but this aspect can of course also be applied to the structure in which the tightening rod is arranged above the outer column. In this case, similarly to the description in the first embodiment, it is only necessary to reverse the vertical direction regarding the members and the positional relationship b...

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Abstract

The present invention realizes the structure of a shock-absorbing steering device capable of obtaining excellent performance at low cost while ensuring the freedom of design. An energy-absorbing member comprises: a substrate portion (55, 71); an energy-absorbing portion (53, 73) having a turned-back portion (57, 73) that is provided to the rear side of the substrate portion or extends rearward from the substrate portion and is turned back in the U-shape upward or downward relative to the substrate portion; a rear-end attaching portion (58, 74) provided to the front end portion of the turned-back portion; and a front-end attaching portion (54, 76) provided in front of the substrate portion. The front end portion of the turned-back portion (57, 73) and the rear-end attaching portion (58, 74) are arranged in a space between a pair of walls to be nipped (11a) and are fixed to a tightening rod (27a). The front-end attaching portion (54, 76) is fixed to the front end portion of an inner column (14a) or to a housing (16) of an electric power steering device. A guide portion is provided in the vicinity of the energy-absorbing portion (53, 73). The guide portion guides the movement of the turned-back portion (57, 73) when the turned-back portion (57, 73) moves along with the forward movement of an outer column (13a) and the rear-end attaching portion (58, 74) upon secondary collision.

Description

technical field [0001] The present invention relates to an improvement of an impact-absorbing steering device capable of displacing the steering wheel forward while absorbing the impact energy applied to the steering wheel from the driver's body in the event of a collision accident. Background technique [0002] Such as Figure 20 As shown, the steering device for a motor vehicle is configured in the following manner: the rotation of the steering wheel 1 is transmitted to the input shaft 3 of the steering gear unit 2, and as the input shaft 3 rotates, a pair of left and right tie rods 4 are pushed and pulled, and the front The wheels are given the steering angle. Therefore, the steering wheel 1 is supported and fixed to the rear end portion of the steering shaft 5 , and the steering shaft 5 is rotatably supported by the steering column 6 while penetrating the cylindrical steering column 6 in the axial direction. Further, the front end of the steering shaft 5 is connected to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D1/19B62D1/18B62D5/04
CPCB62D1/195B62D1/184F16F7/123
Inventor 成田典智山本恒
Owner NSK LTD
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