JPS6340282U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面はこの考案の一実施例を示すもので、第１
図は全体の概略構成図、第２図は要部の概略構成
を示す縦断面図、第３図は前輪舵角連動手段の要
部構成を示す縦断面図、第４図はリヤサスペンシ
ヨン装置の要部の概略構成を示す平面図、第５図
は同斜視図、第６図は第２図の―線断面図、
第７図は制御弁を示す平面図、第８図は第７図の
―線断面図、第９図はスプールバルブの切欠
部を示す縦断面図、第１０図は第７図の―線
断面図、第１１図は後輪舵角連動手段の概略構成
を示す平面図、第１２図は動作方向切換え機構の
概略構成図、第１３図は調整プレートを示す平面
図、第１４図は同側面図、第１５図は方向切換え
弁の接続状態を示す概略構成図、第１６図は車速
と前、後輪の操舵状態との関係を示す特性図、第
１７図は制御弁のスプールバルブの動作特性を示
す特性図である。 １……前輪、２……後輪、７……前輪操舵機構
、１６……前輪舵角連動手段、３５……後輪操舵
機構、４１……制御弁、４９……スリーブバルブ
（第２の弁体）、５０……スプールバルブ（第１
の弁体）、５１……後輪舵角連動手段、６６……
油圧ポンプ（油圧源）、８２……動作方向切換え
機構、８３……方向切換え弁。 The drawing shows one embodiment of this invention.
The figure is a schematic diagram of the overall configuration, Figure 2 is a vertical sectional view showing the schematic configuration of the main parts, Figure 3 is a vertical sectional view showing the main part configuration of the front wheel steering angle interlocking means, and Figure 4 is the rear suspension device. 5 is a perspective view of the same, and FIG. 6 is a sectional view taken along the line -- of FIG. 2.
Fig. 7 is a plan view showing the control valve, Fig. 8 is a sectional view taken along the line - - in Fig. 7, Fig. 9 is a longitudinal sectional view showing the notch of the spool valve, and Fig. 10 is a sectional view taken along the line - - in Fig. 7. Figure 11 is a plan view showing the schematic configuration of the rear wheel steering angle interlocking means, Figure 12 is a schematic configuration diagram of the operating direction switching mechanism, Figure 13 is a plan view showing the adjustment plate, and Figure 14 is the same side view. Figure 15 is a schematic configuration diagram showing the connection state of the directional control valve, Figure 16 is a characteristic diagram showing the relationship between vehicle speed and front and rear wheel steering conditions, and Figure 17 is the operation of the spool valve of the control valve. FIG. 3 is a characteristic diagram showing characteristics. DESCRIPTION OF SYMBOLS 1... Front wheel, 2... Rear wheel, 7... Front wheel steering mechanism, 16... Front wheel steering angle interlocking means, 35... Rear wheel steering mechanism, 41... Control valve, 49... Sleeve valve (second valve body), 50...spool valve (first
valve body), 51... Rear wheel steering angle interlocking means, 66...
Hydraulic pump (hydraulic source), 82...Operating direction switching mechanism, 83...Direction switching valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 前輪を操舵する前輪操舵機構と、この前輪操舵
機構に連結され、前輪操舵時の前輪の舵角変化に
対応して動作する前輪舵角連動手段と、油圧源か
ら供給される圧油を受けて後輪を操舵する後輪操
舵機構と、この後輪操舵機構に連結され、後輪操
舵時の後輪の舵角変化に対応して動作する後輪舵
角連動手段と、前記後輪操舵機構と前記油圧源と
の間の油通路に介設されるとともに、前記前輪舵
角連動手段に連結されて変位動作する第１の弁体
および前記後輪舵角連動手段に連結されて変位動
作する第２の弁体を備え、これらの第１および第
２の弁体の相対変位により前記後輪操舵機構への
圧油の供給を制御する制御弁と、前記後輪操舵機
構のアクチユエータへの圧油の作用方向を前記制
御弁とは独立に切換える方向切換え弁と、前記前
輪舵角連動手段または前記後輪舵角連動手段のう
ちの何れか一方側に設けられ、前記方向切換え弁
の切換え動作に連動して車輪の操舵方向に対する
第１または第２の弁体の変位動作方向を切換え操
作する弁体の動作方向切換え機構とを具備したこ
とを特徴とする４輪操舵装置。 A front wheel steering mechanism that steers the front wheels; a front wheel steering angle interlocking means that is connected to the front wheel steering mechanism and operates in response to changes in the steering angle of the front wheels during front wheel steering; a rear wheel steering mechanism that steers a rear wheel; a rear wheel steering angle interlocking means that is connected to the rear wheel steering mechanism and operates in response to changes in the steering angle of the rear wheels during rear wheel steering; and the rear wheel steering mechanism. and a first valve body disposed in an oil passage between the hydraulic pressure source and the front wheel steering angle interlocking means, and connected to the front wheel steering angle interlocking means for displacement operation; and a first valve body connected to the rear wheel steering angle interlocking means for displacement operation. a control valve that includes a second valve body and controls the supply of pressure oil to the rear wheel steering mechanism by relative displacement of the first and second valve bodies; a direction switching valve that switches the direction of oil action independently of the control valve; and a switching operation of the direction switching valve provided on either one of the front wheel steering angle interlocking means or the rear wheel steering angle interlocking means. 1. A four-wheel steering device comprising: a valve body operation direction switching mechanism that switches the displacement operation direction of the first or second valve body with respect to the steering direction of the wheels in conjunction with the steering direction of the wheels.