JPS63185781U

JPS63185781U -

Info

Publication number: JPS63185781U
Application number: JP7771587U
Authority: JP
Priority date: 1987-05-23
Filing date: 1987-05-23
Publication date: 1988-11-29
Anticipated expiration: 2002-05-23
Also published as: JPH07387Y2

Description

[Brief explanation of the drawing]

第１〜１５図は本考案の第１実施例としての車
両用前後輪操舵装置を示すもので、第１図はその
中立位置付勢機構を示す平面図、第２図はその変
位非線形伝達機構による変位伝達状態を示すグラ
フ、第３図はその全体構成を示す模式的な斜視図
、第４図はそのベベルギヤアセンブリを示す縦断
面図、第５図はその円筒型カム機構を示す斜視図
、第６図ａはその円筒型カム機構の縦断面図、第
６図ｂはその円筒型カム機構の横断面図、第７図
はその円筒型カム機構による動力伝達状態を説明
するためのグラフ、第８，９図はいずれもその円
筒型カム機構による後輪操舵特性を示すグラフ、
第１０図ａはそのロータリバルブの鉛直縦断面図
、第１０図ｂはそのロータリバルブの要部水平縦
断面図、第１１図ａは第１０図ａのａ―
ａ矢視断面図、第１１図ｂは第１０図ａのｂ
―ｂ矢視断面図、第１１図ｃは第１０図ａの
ｃ―ｃ矢視断面図、第１１図ｄは第１０
図ａのｄ―ｄ矢視断面図、第１２図ａ，
ｂはそのロータリバルブの作動状態を第１１図ａ
と対応させて示す横断面図、第１２図ｃはそのロ
ータリバルブの作動状態を第１１図ｂと対応させ
て示す横断面図、第１２図ｄはそのロータリバル
ブの作動状態を第１１図ｃと対応させて示す横断
面図、第１３図ａはその後輪転舵比調整機構にそ
なえられる同相逆相変換機構の一部を破断して示
す平面図、第１３図ｂはその同相逆相変換機構の
一部を破断して示す側面図、第１３図ｃはその同
相逆層変換機構の一部を破断して示す後方正面図
、第１４図ａ〜ｃはいずれもその同相逆相変換機
構の動作を説明するための斜視図、第１５図はそ
の後輪操舵出力特性を示すグラフ、第１６図は本
考案の第２実施例としての車両用前後輪操舵装置
の中立位置付勢機構を示す平面図であり、第１７
図は一般的な線形の中立位置付勢機構による後輪
操舵出力特性を示すグラフである。１…ステアリングホイール、１ａ…フロントパ
ワーステアリングギヤボツクス、１ｂ…ステアリ
ングシヤフト、１ｃ…タイロツド、２ａ…前輪、
２ｂ…後輪、２ｂ′…ハブキヤリヤ、３…ベベル
ギヤアセンブリ、４…コントロールシヤフト、５
…円筒型カム機構、５Ａ…リミツト出力機構、６
…同相逆相変換機構、６Ａ…スライド方向変換部
、６Ｂ…後輪操舵力伝達部、６Ｃ…カム溝方向調
整部、７…ステツピングモータアセンブリ、７ａ
…エンコーダ、７ｂ…ステツピングモータ、８…
ロータリバルブ、９…アクチユエータとしてのリ
ヤパワーシリンダ、１０…リヤサスペンシヨン、
１０ａ…トレーリングアーム、１０ｂ…ラテラル
ロツド、１２…シヤシメンバ、１３…ブラケツト
、１４…スライド用ロツド、１４ａ…ナツト、１
５…メタルブツシユ、１６…弾性ブツシユ、１７
，１７′…付勢部材、１７ａ…付勢部材本体、１
７ｂ…リング部、１８，１８′…変位伝達部材、
１８ａ…スライド部材、１９…旋回式連結部材、
１９ａ…ピン、１９ｂ…長穴、２０…進退式連結
部材、２１…前輪操舵用のシヤフト、２１ａ…ラ
ツク、３０…ケーシング、２２…ブラケツト、２
３…支持ロツド、２３ａ…ナツト、２４…弾性ブ
ツシユ、２５…メタルブツシユ、２６，２７…ピ
ン、２８…ラツク部材、２８ａ…ラツク、２９…
扇形の旋回式連結部材、２９ａ…歯、２９ｂ…ピ
ン、３１…第１のシヤフト（ピニオン軸）、３２
…第１のベベルギヤ、３３…第２のシヤフト、３
４…第２のベベルギヤ、３５…ユニバーサルジヨ
イント、３５ａ…ダストカバー、３６ａ，３６ｂ
，３６ｃ，３６ｄ…ベアリング、３７…樹脂ピン
、３８ａ…シーラ、５０…ケーシング、５０ａ…
スライド室、５１…円筒カム、５２…スライダ、
５２ａ…スライダ基部、５２ｂ…筒状摺動部材、
５３…溝（カム溝）、５３ａ…螺旋状溝（螺旋状
のカム溝）、５３ｂ，５３ｃ…円弧状溝（円弧状
溝のカム溝）、５４…スライドロツド、５５…ス
プリングピン、５６…ベアリング、５７…ベアリ
ング、５８…ナツト、５９…ベアリング、６０…
ケーシング、６０ａ…軸受、６１…円盤型カム、
６１ａ…カム溝、６２…スライドピン、６２ａ…
摺動リング、６２ｂ…ピン取付部材、６３…ガイ
ド部材、６３ａ…ガイド用長穴、６４…スライド
プレート（スライド部材）、６４ａ…ラツク、６
４ｂ…スライド用ベアリング、６４ｃ…ベアリン
グ、６４ｄ…取付板、６５…カム側のベベルギヤ
、６６…スプライン軸、６６ａ…キー、６７…ス
テツピングモータ側のベベルギヤ、６７ａ…キー
溝、６７ｂ…ベアリング、６９…ピニオン、６９
ａ…ピニオン軸、６９ｂ…ピン、８０…ハウジン
グ、８０ａ…前部ハウジング、８０ｂ…中間部ハ
ウジング、８０ｃ…後部ハウジング、８０ｄ…弁
室、８０ｅ…ボルト・ナツト、８１…スプール、
８１ａ…第１の開口、８１ｂ…第２の開口、８１
ｃ…環状溝、８１ｄ…第３の開口、８１ｅ…凹所
、８２…ロータリシヤフト、８２ａ…第１の凹所
、８２ｂ…第２の凹所、８２ｃ…第１の連絡口、
８２ｄ…第２の連絡口、８２ｅ…第１の仕切壁、
８２ｆ…第２の仕切壁、８２ｇ…中空部、８３…
追従シヤフト、８３ａ…ピン、８３ｂ…中空部、
８３ｃ…開口、８４ａ…第１のリング、８４ｂ…
第２のリング、８４ｃ…連通室、８４ｄ〜８４ｇ
…開口、８５…内部シヤフト、８６…ピン、８７
ａ，８７ｂ，８７ｃ…ベアリング、８８…シール
リング、８８ａ，８８ｂ，８８ｃ，８８ｄ，８８
ｅ，８８ｆ…Ｏリング、８９ａ…第１の環状油室
、８９ｂ…第２の環状油室、８９ｃ…第３の環状
油室、９２ａ，９２ｂ…ピストンロツド（タイロ
ツド）、ＥＭ…車幅方向スライド機構、ＦＭ…前
輪転舵機構、ＲＣ…後輪転舵比調整機構、ＲＭ…
後輪転舵機構、ＳＭ…中立位置付勢機構、ＳＴ…
ステアリング機構、ＴＭ…変位非線形伝達機構、
ＰＰ…プレツシヤポート（Ｐポート）、ＰＲ…リ
ターンポート（Ｒポート）、ＰＸ…Ｘポート、Ｐ
Ｙ…Ｙポート。 1 to 15 show a front and rear wheel steering device for a vehicle as a first embodiment of the present invention, FIG. 1 is a plan view showing its neutral position biasing mechanism, and FIG. 2 is its displacement nonlinear transmission mechanism. FIG. 3 is a schematic perspective view showing the overall configuration, FIG. 4 is a vertical sectional view showing the bevel gear assembly, and FIG. 5 is a perspective view showing the cylindrical cam mechanism. FIG. 6a is a longitudinal cross-sectional view of the cylindrical cam mechanism, FIG. 6b is a cross-sectional view of the cylindrical cam mechanism, and FIG. 7 is a graph for explaining the state of power transmission by the cylindrical cam mechanism. Figures 8 and 9 are graphs showing the rear wheel steering characteristics of the cylindrical cam mechanism.
Fig. 10a is a vertical cross-sectional view of the rotary valve, Fig. 10b is a horizontal longitudinal cross-sectional view of the main part of the rotary valve, and Fig. 11a is a-a of Fig. 10a.
11 b is a cross-sectional view in the direction of the arrow a, and b is in Fig. 10 a.
11c is a sectional view taken along the c-c arrow of FIG. 10a, and FIG.
Cross-sectional view taken along line dd in Figure a, Figure 12a,
b shows the operating state of the rotary valve in Fig. 11a.
FIG. 12c is a cross-sectional view showing the operating state of the rotary valve in correspondence with FIG. 11b, and FIG. FIG. 13a is a partially cutaway plan view of the in-phase and out-of-phase conversion mechanism provided in the rear wheel steering ratio adjustment mechanism, and FIG. 13b is its in-phase and out-of-phase conversion mechanism. FIG. 13c is a partially cutaway side view of the in-phase and reverse layer conversion mechanism, and FIGS. A perspective view for explaining the operation, FIG. 15 is a graph showing rear wheel steering output characteristics, and FIG. 16 is a plane showing a neutral position biasing mechanism of a front and rear wheel steering device for a vehicle as a second embodiment of the present invention. Fig. 17
The figure is a graph showing rear wheel steering output characteristics by a general linear neutral position biasing mechanism. 1...Steering wheel, 1a...Front power steering gear box, 1b...Steering shaft, 1c...Tie rod, 2a...Front wheel,
2b...Rear wheel, 2b'...Hub carrier, 3...Bevel gear assembly, 4...Control shaft, 5
...Cylindrical cam mechanism, 5A...Limit output mechanism, 6
... In-phase/reverse-phase conversion mechanism, 6A... Slide direction conversion section, 6B... Rear wheel steering force transmission section, 6C... Cam groove direction adjustment section, 7... Stepping motor assembly, 7a
...Encoder, 7b...Stepping motor, 8...
Rotary valve, 9... Rear power cylinder as actuator, 10... Rear suspension,
10a... Trailing arm, 10b... Lateral rod, 12... Chassis member, 13... Bracket, 14... Slide rod, 14a... Nut, 1
5...Metal bushing, 16...Elastic bushing, 17
, 17'...Biasing member, 17a...Biasing member main body, 1
7b...Ring part, 18, 18'...Displacement transmission member,
18a...Slide member, 19...Swivel type connection member,
19a...pin, 19b...elongated hole, 20...advance/retreat type connecting member, 21...shaft for front wheel steering, 21a...rack, 30...casing, 22...bracket, 2
3... Support rod, 23a... Nut, 24... Elastic bushing, 25... Metal bushing, 26, 27... Pin, 28... Rack member, 28a... Rack, 29...
Sector-shaped rotating connecting member, 29a...teeth, 29b...pin, 31...first shaft (pinion shaft), 32
...First bevel gear, 33...Second shaft, 3
4...Second bevel gear, 35...Universal joint, 35a...Dust cover, 36a, 36b
, 36c, 36d...bearing, 37...resin pin, 38a...sealer, 50...casing, 50a...
Slide chamber, 51...Cylindrical cam, 52...Slider,
52a...slider base, 52b...cylindrical sliding member,
53...Groove (cam groove), 53a...Spiral groove (helical cam groove), 53b, 53c...Circular groove (circular groove cam groove), 54...Slide rod, 55...Spring pin, 56...Bearing, 57...Bearing, 58...Nut, 59...Bearing, 60...
Casing, 60a...Bearing, 61...Disk-shaped cam,
61a...Cam groove, 62...Slide pin, 62a...
Sliding ring, 62b...Pin mounting member, 63...Guide member, 63a...Elongated hole for guide, 64...Slide plate (slide member), 64a...Rack, 6
4b...Sliding bearing, 64c...Bearing, 64d...Mounting plate, 65...Bevel gear on cam side, 66...Spline shaft, 66a...Key, 67...Bevel gear on stepping motor side, 67a...Keyway, 67b...Bearing, 69 ...Pinion, 69
a... Pinion shaft, 69b... Pin, 80... Housing, 80a... Front housing, 80b... Intermediate housing, 80c... Rear housing, 80d... Valve chamber, 80e... Bolt/nut, 81... Spool,
81a...first opening, 81b...second opening, 81
c... annular groove, 81d... third opening, 81e... recess, 82... rotary shaft, 82a... first recess, 82b... second recess, 82c... first communication port,
82d...second communication port, 82e...first partition wall,
82f...second partition wall, 82g...hollow part, 83...
Following shaft, 83a...pin, 83b...hollow part,
83c...opening, 84a...first ring, 84b...
Second ring, 84c...Communication chamber, 84d to 84g
...Opening, 85...Internal shaft, 86...Pin, 87
a, 87b, 87c...Bearing, 88...Seal ring, 88a, 88b, 88c, 88d, 88
e, 88f...O ring, 89a...first annular oil chamber, 89b...second annular oil chamber, 89c...third annular oil chamber, 92a, 92b...piston rod (tie rod), EM...vehicle width direction sliding mechanism , FM...front wheel steering mechanism, RC...rear wheel steering ratio adjustment mechanism, RM...
Rear wheel steering mechanism, SM...neutral position biasing mechanism, ST...
Steering mechanism, TM...displacement nonlinear transmission mechanism,
PP...pressure port (P port), PR...return port (R port), PX...X port, P
Y...Y port.

Claims

[Scope of utility model registration request]

A trailing arm comprising a steering mechanism, a front wheel steering mechanism and a rear wheel steering mechanism connected to the steering mechanism, the rear wheel steering mechanism having a rear end connected to the rear wheel and a front end connected to the vehicle body. and an actuator capable of driving the trailing arm substantially in the vehicle width direction, and configured so that the rear wheels are steered in accordance with the movement of the trailing arm in the vehicle width direction, and The front ends of the trailing arms are pivotally connected to the vehicle body via a vehicle widthwise slide mechanism so that they can slide substantially in the vehicle width direction, and the trailing arms are provided between the front ends of these trailing arms and the vehicle body. A neutral position biasing mechanism is provided that biases the rear wheel to a neutral position via an arm, and the neutral position biasing mechanism is attached to the vehicle body and uses its own rotational displacement to bias the rear wheel to the neutral position. A biasing member is interposed between the biasing member and the trailing arm to exert a biasing force on the trailing arm. and a displacement transmitting member capable of rotationally displacing the biasing member, the displacement transmitting member decreasing the amount of rotational displacement increase of the biasing member as the displacement of the trailing arm increases. 1. A front and rear wheel steering device for a vehicle, characterized in that a displacement nonlinear transmission mechanism is provided for transmitting a displacement as shown in FIG.