JPH0363463U

JPH0363463U -

Info

Publication number: JPH0363463U
Application number: JP12348389U
Authority: JP
Priority date: 1989-10-20
Filing date: 1989-10-20
Publication date: 1991-06-20

Description

[Brief explanation of the drawing]

第１図はこの考案の１実施例を示す衝撃吸収式
ステアリングコラムの部分切欠き平面図、第２図
は第１図−線の拡大断面図、第３図は第１図
−線の部分切欠き矢視図、第４図は第１図
−線の拡大断面図、第５図は第４図−線の
断面図、第６図は第４図−線の断面図、第７
図は第１図の一部を拡大して示す平面図、第８図
は第７図−線の断面図、第９図は第７図−
線の断面図、第１０図は第７図−線の断面
図、第１１図はコラムチユーブが少し圧縮された
状態を示す第１図相当の図面、第１２図はコラム
チユーブが最大限圧縮された状態を示す第１図相
当の図面、第１３図ａ，ｂ，ｃはそれぞれアツパ
チユーブの移動ストロークと荷重との関係の１例
を示すグラフ、第１４図ａは他の実施例を示す第
２のエネルギ吸収部材の部分の平面図、第１４図
ｂは第１４図ａ−線の断面図、第１５図
は他の実施例のアツパチユーブの移動ストローク
と荷重との関係を示すグラフである。２……コラムチユーブ、１０……アツパチユー
ブ（後部チユーブ）、１１……ロアチユーブ（前
部チユーブ）、１２……鋼球（転動部材）、１４
，１８……車体の固定部分、１６……支持ブラケ
ツト（支持部材）、１７……塑性変形部材、１７
ｃ……長穴、１７ｄ……ピン、２６……切欠き（
ボルト挿通用長穴）、２８……環座、３２……ボ
ルト。 Figure 1 is a partially cutaway plan view of a shock absorbing steering column showing one embodiment of this invention, Figure 2 is an enlarged sectional view taken along the line in Figure 1, and Figure 3 is a partially cutaway view taken along the line in Figure 1. Fig. 4 is an enlarged sectional view taken along the line of Fig. 1, Fig. 5 is a sectional view taken along the line of Fig. 4, and Fig. 6 is a sectional view taken along the line of Fig. 4.
The figure is a plan view showing an enlarged part of FIG. 1, FIG. 8 is a cross-sectional view along the line of FIG. 7, and FIG.
Figure 10 is a cross-sectional view taken along the line from Figure 7, Figure 11 is a drawing equivalent to Figure 1 showing the column tube in a slightly compressed state, and Figure 12 shows the column tube being compressed to the maximum. Fig. 13a, b, and c are graphs each showing an example of the relationship between the moving stroke of the atupate tube and the load, and Fig. 14a is a graph corresponding to Fig. 1 showing another embodiment. FIG. 14b is a sectional view taken along the line a in FIG. 14, and FIG. 15 is a graph showing the relationship between the moving stroke and load of the uppipe tube of another embodiment. 2... Column tube, 10... Upper tube (rear tube), 11... Lower tube (front tube), 12... Steel ball (rolling member), 14
, 18... Fixed part of the vehicle body, 16... Support bracket (support member), 17... Plastic deformation member, 17
c...Elongated hole, 17d...Pin, 26...Notch (
long hole for bolt insertion), 28... ring seat, 32... bolt.

Claims

[Claims for Utility Model Registration] (1) The front tube and rear tube constituting the column tube can be expanded and contracted as a whole, and the relative relationship between the two tubes is A first energy absorbing member is arranged, the first energy absorbing member having a characteristic curve in which the load is approximately constant as the travel stroke increases;
A second energy absorbing member having a characteristic curve such that the front tube is fixed to a fixed part of the vehicle body and the rear tube moves forward when a forward impact force is applied and the load increases as the travel stroke increases. An energy-absorbing steering column that is attached to a fixed part of the vehicle body via. (2) The first energy absorbing member is composed of a fitting portion of the front tube and the rear tube, and a plurality of rolling members press-fitted between both members of the fitting portion. Claim (1)
Energy-absorbing steering column described in . (3) The second energy absorbing member includes a support member fixed to the rear tube and having an elongated bolt insertion hole opened toward the steering wheel, the bolt, and a fixed part of the vehicle body to which the support member is attached. a ring seat which is interposed in the elongated hole of the support member and the elongated hole portion of the plastic deformation member, and which is responsible for the tightening axial force of the bolt that attaches the support member to a fixed part of the vehicle body, with the plastic deformation member interposed therebetween; , one end is fixed to the steering gear side end of the support member, and the other end is arranged on the steering wheel side, and between both ends there is a deformed column part having a plurality of continuous bent parts meandering on both sides. formed,
and a plastically deformable member having a saturated spring characteristic portion consisting of a curved convex portion that is elastically deformed in response to the tightening axial force until it is limited by the ring seat of the bolt. The energy absorbing steering column described in (1). (4) The first energy absorbing member sets the initial impact load low by compressing the column tube in advance and plastically deforming the fitting portion between the front tube and the rear tube using a rolling member. The energy absorbing steering column described in item (2). (5) Claim (3), wherein the plastically deformable member of the second energy absorbing member has an elongated hole formed at one end thereof, and is supported by the support member via a pin inserted into the elongated hole. Energy-absorbing steering column described in .