JPS6226168A - Steering device for vehicle - Google Patents

Steering device for vehicle

Info

Publication number
JPS6226168A
JPS6226168A JP16545285A JP16545285A JPS6226168A JP S6226168 A JPS6226168 A JP S6226168A JP 16545285 A JP16545285 A JP 16545285A JP 16545285 A JP16545285 A JP 16545285A JP S6226168 A JPS6226168 A JP S6226168A
Authority
JP
Japan
Prior art keywords
angle
king pin
case
steering
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16545285A
Other languages
Japanese (ja)
Inventor
Kenji Kondo
健二 近藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP16545285A priority Critical patent/JPS6226168A/en
Publication of JPS6226168A publication Critical patent/JPS6226168A/en
Pending legal-status Critical Current

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  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

PURPOSE:To enable the maximum steering angle of a steering control wheel to be large so as to minimize the minimum turning radius by allowing a king pin angle to be large in the steering control wheel which is made to be steered as required around the king pin. CONSTITUTION:A stationary case 15 is fixed on the outer section of a front wheel case 14. A movable case 16 is installed rotatably in relation to said stationary case 15, around a king pin 17. The king pin 17 is tilted inward as it goes upward, and is rotatably supported by both said cases 15 and 16 by way of bearings 18. A king pin angle alpha is set to be larger than the former one, and an angle of 15-20 deg. is considered appropriate.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、トラクタ等の車輌における操向装置に関する
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a steering device for a vehicle such as a tractor.

(従来の技術) 例えば、トラクタでは、操向輪とされる前輪のキングピ
ン角は、二輪駆動の場合には、7〜8.5°、又、四輪
駆動の場合は、9.5〜1o、5°程度であって、あま
り大きくなかった。
(Prior Art) For example, in a tractor, the kingpin angle of the front wheel, which is a steering wheel, is 7 to 8.5 degrees in the case of a two-wheel drive, and 9.5 to 1 degree in the case of a four-wheel drive. , it was about 5 degrees, which was not very large.

(発明が解決しようとする問題点) このため、前輪を左又は右に操向した場合に、前輪の外
側への倒れがあまり大きくならず、そのため、前輪の切
れ角が小さい状態で、前輪上部とボンネット等の車体側
とが干渉し易すかった。
(Problem to be Solved by the Invention) For this reason, when the front wheels are steered to the left or right, the front wheels do not tilt outward very much, and as a result, when the front wheels have a small turning angle, the upper part of the front wheels It was easy to interfere with the vehicle body side such as the hood.

そのため、従来においては、前輪の最大切れ角を大とで
きず、最小旋回半径を小さくできなかった。
Therefore, in the past, the maximum turning angle of the front wheels could not be increased, and the minimum turning radius could not be reduced.

そこで、上記問題を解決すべく、前輪のキャスタ角を大
とした操向装置が提案されたている。
Therefore, in order to solve the above problem, a steering device in which the caster angle of the front wheels is increased has been proposed.

然し乍ら、上記のものでは、キャスタ角が通常の値より
大きい為、操縦安定性に問題がある。
However, in the above-mentioned vehicle, since the caster angle is larger than the normal value, there is a problem in steering stability.

本発明は上記問題を解決できる車輌における操向装置を
提供することを目的とする。
An object of the present invention is to provide a steering device for a vehicle that can solve the above problems.

(問題点を解決するための手段) 上記目的を達成するために、本発明の特徴とする処は、
操向輪5をキングピン17廻りに操向自在としたものに
おいて、キングピン角αを大とした点にある。
(Means for solving the problems) In order to achieve the above object, the features of the present invention are as follows:
The steering wheel 5 can be freely steered around the kingpin 17, and the kingpin angle α is made large.

(実施例) 以下、本発明を四輪駆動トラクタに適用した一実施例を
図面に基き説明すれば、第2図において、1はトラクタ
車体で、エンジン2、ミッションケース3等により構成
されている。
(Example) An example in which the present invention is applied to a four-wheel drive tractor will be described below based on the drawings. In Fig. 2, 1 is a tractor body, which is composed of an engine 2, a transmission case 3, etc. .

4はエンジン2等を覆被するボンネット、5は操向輪と
される前輪、6は後輪、7はハンドル、8は座席である
4 is a bonnet that covers the engine 2, etc., 5 is a front wheel serving as a steering wheel, 6 is a rear wheel, 7 is a steering wheel, and 8 is a seat.

第3図及び第4図にも示すように、エンジン2からは前
車軸フレーム9が前方に突設されている。
As shown in FIGS. 3 and 4, a front axle frame 9 projects forward from the engine 2.

10は前車軸フレーム9下方に配置された前輪デフケー
スで、前車軸フレーム9に前後一対の取付装置11を介
して前後方向の軸心廻りに回動自在に支持されている。
A front wheel differential case 10 is disposed below the front axle frame 9, and is rotatably supported by the front axle frame 9 through a pair of front and rear mounting devices 11 about an axis in the front and rear direction.

デフケース10内には、ミッションケース3側から動力
取出装置12を介して動力が伝達される前輪デフ装置が
備えられ、該装置からは前車軸13が両側方に派出され
ている。
A front wheel differential device to which power is transmitted from the transmission case 3 side via a power extraction device 12 is provided within the differential case 10, and a front axle 13 extends from the device to both sides.

14は左右一対の前車軸ケースで、デフケース10から
両側方に延設され、前車軸13を内存する。
A pair of left and right front axle cases 14 extend from the differential case 10 to both sides and house the front axle 13 therein.

第1図にも示すように、15は固定ケースで、前車軸ケ
ース14の外側部に固設されている。
As shown in FIG. 1, a fixed case 15 is fixed to the outside of the front axle case 14. As shown in FIG.

16は可動ケースで、固定ケース15に対してキングピ
ン17廻りに回動自在に備えられている。
Reference numeral 16 denotes a movable case, which is rotatably provided around the king pin 17 with respect to the fixed case 15.

キングピン17は上方に向うに従って内側方に移行する
傾斜状とされて、各ケース15.16に軸受18を介し
て回転自在に支持されている。
The king pin 17 has an inclined shape that moves inward as it goes upward, and is rotatably supported by each case 15, 16 via a bearing 18.

キングピン角αは従来の値より大きくされて、11〜4
0°程度とされ、好ましくは、15〜20°程度とされ
ている。
The kingpin angle α has been made larger than the conventional value and is 11 to 4.
The angle is approximately 0°, preferably approximately 15 to 20°.

又、キャンバ角β、キャスタ角は、従来の値と略同程度
とされ、キャンバ角βはO〜2.5°程度とされ、キャ
スタ角はO〜3“程度とされている。
Further, the camber angle β and the caster angle are approximately the same as conventional values, and the camber angle β is approximately 0 to 2.5 degrees, and the caster angle is approximately 0 to 3''.

キングピン17は前車軸13とベベルギヤ伝動機構19
を介して連動連結されると共に、前輪ハブ軸20ともベ
ベルギヤ伝動機構21を介して連動連結されている。
The king pin 17 connects the front axle 13 and the bevel gear transmission mechanism 19
It is also interlocked and connected to the front wheel hub shaft 20 via a bevel gear transmission mechanism 21.

前輪ハブ軸20は可動ケース16に軸受22を介して支
持されると共に、前輪ハブ軸20に前輪5が備えられて
いる。
The front wheel hub shaft 20 is supported by the movable case 16 via a bearing 22, and the front wheel 5 is provided on the front wheel hub shaft 20.

23は操向アームで、外側端部が一側の可動ケース16
上面に固設され、中途部が固定ケース15上面側に回動
自在に支持され、内側端部が、ドラブリンク24に連結
されている。
23 is a steering arm, the outer end of which is located on one side of the movable case 16.
It is fixedly installed on the upper surface, a midway portion is rotatably supported on the upper surface side of the fixed case 15, and an inner end portion is connected to the drive link 24.

25はタイロッドで、左右両側の可動ケース16をブラ
ケット26全介して連動連結する。
Reference numeral 25 denotes a tie rod, which interlocks and connects the movable cases 16 on both the left and right sides through the entire bracket 26.

ミッションケース3上方には操向ギヤボックス27が備
えられ、該ボックス27内の操向ギヤ伝動機構がピット
マンアーム等を介してドラブリンク24と連動連結され
ている。
A steering gear box 27 is provided above the mission case 3, and a steering gear transmission mechanism within the box 27 is operatively connected to the drive link 24 via a pitman arm or the like.

第5図にも示すように、上記操向ギヤ伝動機構からは伝
動軸28が上方に突設され、該伝動軸28に、ハンドル
7が固設されたハンドル軸29が外嵌されて、スプライ
ン結合されている。
As shown in FIG. 5, a transmission shaft 28 is provided to protrude upward from the steering gear transmission mechanism, and a handle shaft 29 to which a handle 7 is fixedly attached is fitted onto the transmission shaft 28 and splined. combined.

上記両軸28 、29はピン30により抜止めされ、ピ
ン30とハンドル軸29間には防振ゴム31が介装され
ている。
Both shafts 28 and 29 are prevented from coming off by a pin 30, and a vibration-proof rubber 31 is interposed between the pin 30 and the handle shaft 29.

尚、第6図に示すように、ピン30と伝動軸28間に防
振ゴム31を介装するようにしてもよい。
Incidentally, as shown in FIG. 6, a vibration isolating rubber 31 may be interposed between the pin 30 and the transmission shaft 28.

上記のように構成した実施例によれば、ハンドル7の操
作により、ハンドル軸29、伝動軸28、操向ギヤ伝動
機構、ピットマンアーム、ドラブリンク24、操向アー
ム23、タイロッド25等を介して、左右の可動ケース
16がキングピン17廻りに回動して、左右の前輪5が
操向せしめられる。
According to the embodiment configured as described above, when the handle 7 is operated, the power is transmitted through the handle shaft 29, the transmission shaft 28, the steering gear transmission mechanism, the pitman arm, the drive link 24, the steering arm 23, the tie rod 25, etc. The left and right movable cases 16 rotate around the king pin 17, and the left and right front wheels 5 are steered.

上記の場合において、キングピン角αが大きくされてい
るので、前輪5がキングピン17廻りに左又は右に操向
されるに従って、第7図に示すように、前輪5は大きく
外側へ倒れ込んで、前輪5下部がボンネット4等の車体
1側下方へ潜り込むと共に、前輪5上部が外方、即ち、
車体1側から離間する方向へ移行する。
In the above case, since the king pin angle α is large, as the front wheel 5 is steered left or right around the king pin 17, the front wheel 5 falls largely outward as shown in FIG. The lower part of the front wheel 5 slips under the bonnet 4 etc. on the side of the vehicle body 1, and the upper part of the front wheel 5 moves outward, that is,
It moves in a direction away from the vehicle body 1 side.

従って、前輪5上部と車体1側との干渉によって、前輪
5の最大切れ角が小さい角度に制限されることはなく、
前輪5の最大切れ角を大とできて、最小旋回半径を小さ
なものとできる。
Therefore, the maximum turning angle of the front wheels 5 is not limited to a small angle due to interference between the upper part of the front wheels 5 and the vehicle body 1 side.
The maximum turning angle of the front wheels 5 can be made large, and the minimum turning radius can be made small.

又、上記のように、前輪5をキングピン17廻りに左又
は右へ操向するに従って、前輪5が外側方へ大きく倒れ
込むので、ハンドル7の回動操作量が従来と同一であっ
ても、前輪5の切れ角を従来より大とでき、旋回時のハ
ンドル7の操作を容易に行える。
Furthermore, as described above, as the front wheels 5 are steered to the left or right around the king pin 17, the front wheels 5 tilt outward significantly, so even if the amount of rotation of the handlebar 7 is the same as before, 5 can be made larger than before, and the handle 7 can be easily operated when turning.

更に、キャンバ角β、キャスタ角は従来の通常の値と略
同程度であるので、操縦安定性にも問題がない。
Further, since the camber angle β and the caster angle are approximately the same as conventional values, there is no problem in steering stability.

尚、本発明は、二輪駆動タイプの車輌にも適用可能であ
る。
Note that the present invention is also applicable to two-wheel drive type vehicles.

(発明の効果) 以上詳述したように、本発明によれば、操向輪の最大切
れ角を大とでき、最小旋回半径を小さくできると共に、
旋回時のハンドル操作も容易に行える。又、キャンバ角
、キャスタ角は従来の通常値と略同程度とできるので、
操縦安定性に問題が生じることも防止できる。本発明は
上記利点を有し、実益大である。
(Effects of the Invention) As detailed above, according to the present invention, the maximum turning angle of the steering wheel can be increased, the minimum turning radius can be decreased, and
The steering wheel can be easily operated when turning. In addition, the camber angle and caster angle can be approximately the same as the conventional normal values, so
Problems in handling stability can also be prevented. The present invention has the above advantages and is of great practical benefit.

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

図面は本発明の一実施例を示し、第1図は要部の背面断
面図、第2図はトラクタの側面図、第3図は前輪懸架部
の正面断面図、第4図は同簡略平面図、第5図は操向系
の一部の連結構造を示す断面図、第6図は連結構造の他
側を示す断面図、第7図は旋回時の状況を説明するため
の説明図である。 1−1−ラクタ車体、5−前輪、17−・キングピン、
α・−キングピン角。
The drawings show one embodiment of the present invention, in which Fig. 1 is a rear sectional view of the main parts, Fig. 2 is a side view of the tractor, Fig. 3 is a front sectional view of the front wheel suspension, and Fig. 4 is a simplified plan view of the tractor. Figure 5 is a cross-sectional view showing the connecting structure of a part of the steering system, Figure 6 is a cross-sectional view showing the other side of the connecting structure, and Figure 7 is an explanatory diagram for explaining the situation when turning. be. 1-1-Rakuta vehicle body, 5-front wheel, 17-・king pin,
α・−Kingpin angle.

Claims (1)

【特許請求の範囲】[Claims] 1、操向輪5をキングピン17廻りに操向自在としたも
のにおいて、キングピン角αを大としたことを特徴とす
る車輌における操向装置
1. A steering device for a vehicle, characterized in that the steering wheel 5 can be freely steered around the kingpin 17, and the kingpin angle α is large.
JP16545285A 1985-07-25 1985-07-25 Steering device for vehicle Pending JPS6226168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16545285A JPS6226168A (en) 1985-07-25 1985-07-25 Steering device for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16545285A JPS6226168A (en) 1985-07-25 1985-07-25 Steering device for vehicle

Publications (1)

Publication Number Publication Date
JPS6226168A true JPS6226168A (en) 1987-02-04

Family

ID=15812687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16545285A Pending JPS6226168A (en) 1985-07-25 1985-07-25 Steering device for vehicle

Country Status (1)

Country Link
JP (1) JPS6226168A (en)

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