JPH0627465Y2 - Safety device for vehicle having steering wheel speed increasing device - Google Patents
Safety device for vehicle having steering wheel speed increasing deviceInfo
- Publication number
- JPH0627465Y2 JPH0627465Y2 JP1987143248U JP14324887U JPH0627465Y2 JP H0627465 Y2 JPH0627465 Y2 JP H0627465Y2 JP 1987143248 U JP1987143248 U JP 1987143248U JP 14324887 U JP14324887 U JP 14324887U JP H0627465 Y2 JPH0627465 Y2 JP H0627465Y2
- Authority
- JP
- Japan
- Prior art keywords
- steering wheel
- speed increasing
- increasing device
- speed
- wheel speed
- 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.)
- Expired - Lifetime
Links
Landscapes
- Arrangement And Driving Of Transmission Devices (AREA)
Description
【考案の詳細な説明】 (イ)産業上の利用分野 この考案は、操向輪増速装置を有する車輌安全装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a vehicle safety device having a steering wheel speed increasing device.
(ロ)従来の技術 従来、例えば、農業用のトラクラーなどの四輪駆動車で
は、旋回時、内輪差により操向輪(前輪)の行路長が後
輪よりも長くなるにもかかわらず、等速で駆動されてい
るため急旋回がやりにくいという欠点があり、この欠点
を解消するために、前車輪のファイナルドライブ装置と
フロントプロペラシャフトとの間に、速比切換自在の増
速装置を介設し、ステアリングホイールを大きく操舵し
たとき、速比切換機構が作動して、上記増速装置を増速
作動側に自動的に切換えることにより前記行路長の差に
よる急旋回の困難を解消するようにしたものが知られて
いる(例えば、特開昭62−55226号公報参照)。(B) Conventional technology Conventionally, for example, in a four-wheel drive vehicle such as an agricultural tractor, when the turning wheel (front wheel) has a longer path length than the rear wheel due to an inner wheel difference when turning, etc. Since it is driven at high speed, there is a drawback that it is difficult to make a sharp turn, and in order to eliminate this drawback, a speed increasing device that can switch the speed ratio is interposed between the final drive device of the front wheels and the front propeller shaft. When the steering wheel is steered greatly, the speed ratio switching mechanism operates to automatically switch the speed increasing device to the speed increasing operation side, thereby eliminating the difficulty of a sharp turn due to the difference in the path length. It is known that the above method is used (see, for example, Japanese Patent Laid-Open No. 62-55226).
(ハ)考案が解決しようとする問題点 しかしながら、速比切換装置はステアリングホイールと
連動しており、機体が傾斜している場合であっても、ス
テアリングホイールを大きく操舵すると操向輪増速装置
が増速作動状態に切換わって急旋回が行われ、機体横転
などの危険を伴うという欠点があった。(C) Problems to be solved by the invention However, the speed ratio switching device is interlocked with the steering wheel, and if the steering wheel is steered greatly, the steered wheel speed increasing device is interlocked with the steering wheel. However, there is a drawback in that a sudden turn is performed by switching to the speed-up operation state, which causes a risk of overturning the body.
(ニ)問題点を解決するための手段 この考案では、前後輪を駆動可能とし、かつ、前輪のフ
ァイナルドライブ装置と、フロントプロペラシャフトと
の間に速比切換可能の操向輪増速装置を介設して、ステ
アリングホイールと連動連結した速比切換機構により同
増速装置を等速作動状態から増速作動状態に切換えられ
るように構成した車輌において、前輪を支持した前車軸
ケースを、前後方向の揺動軸を中心として左右傾動自在
に枢支し、機体と同ケースとの間の相対的な左右傾動角
度を検出する検出機構を配設し、同機構と速比切換機構
とを連動連結して、上記左右傾動角度が予め設定した角
度よりも大となった時、操向輪増速装置を自動的に等速
作動状態に保持させるように構成してなる操向輪増速装
置を有する車輌の安全装置を提供せんとするものであ
る。(D) Means for Solving the Problems In the present invention, there is provided a steering wheel speed increasing device capable of driving front and rear wheels and capable of switching a speed ratio between a final drive device for front wheels and a front propeller shaft. In a vehicle in which a speed ratio switching mechanism interveningly connected to a steering wheel is used to switch the speed increasing device from a constant speed operating state to a speed increasing operating state, a front axle case supporting front wheels is The tilt mechanism is pivoted so that it can be tilted to the left and right around the swing axis, and a detection mechanism that detects the relative tilt angle between the aircraft and the case is provided. When the steering wheel speed increasing device is connected, the steering wheel speed increasing device is configured to automatically maintain a constant speed operation state when the left and right tilt angles are larger than a preset angle. Does not provide a safety device for vehicles with It is what
(ホ)作用・効果 この考案によれば、前輪を支持した前車軸ケースを左右
揺動自在としているために、機体の左右傾斜を機体と前
車軸ケース間の相対傾斜角度で検出することが可能であ
り、この角度が予め設定した角度よりも大になった時
は、操向輪増速装置の等速作動状態を強制的に保持させ
ることにより、機体の急旋回を防止して安全を確保する
ことができる。(E) Action / Effect According to this invention, since the front axle case supporting the front wheels can be swung to the left and right, it is possible to detect the left and right inclination of the body by the relative inclination angle between the body and the front axle case. When this angle becomes larger than the preset angle, the constant speed operation state of the steering wheel speed increasing device is forcibly maintained to prevent sudden turning of the aircraft and ensure safety. can do.
なお、機体傾斜の原因としては、地面の凹凸及び傾斜の
ほかに、機体に作業機を連結した場合、特にフロントマ
ウントの作業機を連結した場合は、重心が高くなり、機
体旋回時機体が左右傾斜しやすくなるものであるが、本
考案では機体が予め設定した角度以上に傾斜すると、直
ちに操向輪増速装置が等速作動状態となり急旋回が防止
されて安全が保たれる。In addition to the unevenness and inclination of the ground, the cause of the body tilt is that the center of gravity becomes high when a work machine is connected to the machine, especially when a front-mounted work machine is connected, and However, in the present invention, when the machine body tilts at a predetermined angle or more, the steered wheel speed increasing device immediately becomes a constant speed operation state, and a sudden turn is prevented to maintain safety.
(ヘ)実施例 本考案の実施例を図面にもとづき詳説すれば、第7図に
おいて、(A)は四輪駆動のトラクターを示し、機体前部
に設けたエンジン部(1)からの動力で、クラッチハウジ
ング(2)、ミッションケース(3)を介して同ケース(3)の
左右側に配した左右の後輪(4)を駆動し、ミッションケ
ース(3)の前方に延出したフロントプロペラシャフト
(5)、ファイナルドライブ装置(6)を介して左右の前輪
(7)を駆動し、エンジン部(1)の後方に設けたステアリン
グホイール(8)で左右の前輪(7)を操向するように構成し
ている。(F) Embodiment An embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 7, (A) shows a four-wheel drive tractor, which is powered by an engine section (1) provided at the front of the machine body. , The clutch housing (2) and the transmission case (3) to drive the left and right rear wheels (4) arranged on the left and right sides of the same case (3) to extend the front propeller extending in front of the transmission case (3). shaft
(5), left and right front wheels via final drive device (6)
The steering wheel (8) provided behind the engine unit (1) is used to drive the (7) and steer the left and right front wheels (7).
なお、前後輪に動力を分配するための差動装置、いわゆ
るセンターデフは、作業走行中の直進性を重視して装備
していない。A differential device for distributing power to the front and rear wheels, a so-called center differential, is not equipped with emphasis on straightness during work traveling.
また、フロントプロペラシャフト(5)と、前輪(7)のファ
イナルドライブ装置(6)との間には、第5図で示すよう
に傘歯車(9a)(9b)(9c)(9d)を用いた差動型の速比切換可
能の操向輪増速装置(9)を介設しており、傘歯車(9d)を
ドッグクラッチ(10)で、フロントプロペラシャフト(5)
と連結した入力軸(11)と連結させていることでファイナ
ルドライブ装置(6)と連結した傘歯車(9a)をフロントプ
ロペラシャフト(5)と等速の回転速度で動力を伝達する
ようにし、前記傘歯車(9d)を湿式多板型のブレーキ(12)
で、同増速装置(9)のケース(13)に固定させることで、
前記傘歯車(9a)を介してファイナルドライブ装置(6)に
前記の二倍の回転速度で動力を伝達するようにしてい
る。Further, bevel gears (9a) (9b) (9c) (9d) are used between the front propeller shaft (5) and the final drive device (6) of the front wheels (7) as shown in FIG. There is a differential type steering wheel speed increasing device (9) that can switch the speed ratio, and the bevel gear (9d) is connected to the dog clutch (10) by the front propeller shaft (5).
By connecting the bevel gear (9a) connected to the final drive device (6) by connecting to the input shaft (11) connected to the front propeller shaft (5), the power is transmitted at a rotation speed equal to that of the front propeller shaft (5). The bevel gear (9d) is a wet multi-plate type brake (12).
Then, by fixing it to the case (13) of the speed increasing device (9),
Power is transmitted to the final drive device (6) at the double rotation speed via the bevel gear (9a).
そして上記の速比切換作動は、入力軸(11)に外嵌したス
ライダー(14)の一端に前記ドッグクラッチ(10)の一方の
歯(10a)を形成し、他端に前記ブレーキ(12)のプレッシ
ャープレート(12a)を形成し、ケース(13)を挿通したシ
フト軸(15)に固設したシフトファーク(15a)の作動によ
りスライダー(14)を移動させて行うようにしている。The speed ratio switching operation described above is performed by forming one tooth (10a) of the dog clutch (10) at one end of the slider (14) externally fitted to the input shaft (11) and the brake (12) at the other end. The pressure plate (12a) is formed, and the slider (14) is moved by the operation of the shift fork (15a) fixed to the shift shaft (15) through which the case (13) is inserted.
図中、(16)は、スライダー(14)をドッグクラッチ(10)方
向に付勢して等速作動状態を保持させるためにリターン
スプリングを示す。In the figure, (16) indicates a return spring for urging the slider (14) toward the dog clutch (10) to maintain a constant speed operation state.
またケース(13)の外部に突出したシフト軸(15)の端部に
は、第3、第4図で示すように切換レバー(17)を固着し
ており、同レバー(17)の先端に回動自在に枢着したジョ
イント金具(18)に速比切換機構(19)のプッシュロッド(2
0)の先端を摺動自在に挿通し、同ロッド(20)の中途に設
けた緩衝機構(24)中のスプリング(25)を介しての押し作
動によりシフト軸(15)を回動させるようにしている。A switching lever (17) is fixed to the end of the shift shaft (15) protruding outside the case (13) as shown in FIGS. 3 and 4, and the tip of the lever (17) is fixed. The push rod (2) of the speed ratio switching mechanism (19) is attached to the joint metal fitting (18) that is pivotally attached.
(0) is slidably inserted, and the shift shaft (15) is rotated by pushing the spring (25) in the buffer mechanism (24) provided in the middle of the rod (20). I have to.
プッシュロッド(20)の基端には、略三角形状のカム板(2
3)が固着しており、同板(23)に形成した凹部(23a)にス
テアリングギヤボックス(21)のピットマンアーム(21a)
と連動連結した中間軸(22)を挿通させており、同カム板
(23)の上下カム面(23b)(23c)を、ステアリングホイール
(8)を大蛇角としたとき、中間軸(22)に同軸(22)とは所
定間隔を保持して軸支した上下カムローラー(29a)(29b)
を同中間軸(22)の回動により押圧して、プッシュロッド
(20)に押し作動を行わせる。At the base end of the push rod (20), a cam plate (2
3) is fixed, and the pitman arm (21a) of the steering gear box (21) is in the recess (23a) formed in the plate (23).
The intermediate shaft (22) that is interlocked with is inserted through the cam plate.
Set the upper and lower cam surfaces (23b) and (23c) of (23) to the steering wheel.
When (8) has a large serpentine angle, the upper and lower cam rollers (29a) and (29b) are coaxially supported by the intermediate shaft (22) at a predetermined distance.
Is pushed by the rotation of the intermediate shaft (22), and the push rod
Press (20) to activate.
また、上下カムローラー(29a)(29b)は中間軸(22)にスプ
ライン嵌合した管軸(30)に突設したローラー支持板(31)
に軸支されており、管軸(30)を左右傾動角度の検出機構
(N)と連結したワイヤー(32)で軸方向に摺動させて、上
下カムローラー(29a)(29b)を上下カム面(23b)(23c)とを
当接させないようにすることにより、操向輪の増速作動
を、上記検出機構(N)で検出した機体と前車軸ケース(3
6)との傾斜角度が予め設定した角度以内にあるときだけ
作動させるようにしている。Further, the upper and lower cam rollers (29a) (29b) are roller support plates (31) protruding from the pipe shaft (30) spline-fitted to the intermediate shaft (22).
The pipe shaft (30) is supported by the
(N) is slid in the axial direction with the wire (32) connected to it so that the upper and lower cam rollers (29a) and (29b) do not come into contact with the upper and lower cam surfaces (23b) and (23c). The speed-increasing operation of the direction wheels is detected by the detection mechanism (N) and the front axle case (3
It is designed to operate only when the inclination angle with 6) is within the preset angle.
上記検出機構(N)は、第1図、第2図で示すように左右
の前輪(7)を支持した前車軸ケース(36)の中央部に突設
した前後方向の揺動軸(39a)(39b)を、フレーム(37)の下
面に垂設した前後ブラケット(38a)(38b)を介し回動自在
に枢支して、前車軸ケース(36)を左右傾動自在とし、前
車軸ケース(36)の後面にカムプレート(40)を固設すると
共に、後ブラケット(38b)にカムフォロワー(41)に挿通
させ、同フォロワー(41)を前記のワイヤー(32)に連結し
ている。The detection mechanism (N) is a rocking shaft (39a) in the front-rear direction projecting from the center of the front axle case (36) supporting the left and right front wheels (7) as shown in FIGS. 1 and 2. The front axle case (36) is rotatably supported by the front and rear brackets (38a) and (38b) suspended from the lower surface of the frame (37) so that the front axle case (36) can be tilted left and right. A cam plate (40) is fixed to the rear surface of the (36), and a cam follower (41) is inserted into the rear bracket (38b), and the follower (41) is connected to the wire (32).
図中(42)は、ワイヤー(32)を引張り方向に付勢し、か
つ、カムフォロワー(41)をカムプレート(40)に当接させ
るためのスプリングを示し、同スプリング(42)の付勢に
より、カムフォロワー(41)がカムプレート(40)の山部(4
0a)に当接しているときは、前記の速比切換機構(19)の
管軸(30)をカム板(23)方向に摺動させて、操向輪増速装
置(9)を増速作動状態にさせており、カムフォロワー(4
1)が谷部(40b)に当接しているときは、ワイヤー(32)を
牽引して、レバー(43)を介し管軸(30)を摺動させてカム
板(23)と上下カムローラー(29a)(29b)とが当接しないよ
うにして操向輪増速装置(9)を等速作動状態に強制的に
保持するものである。In the figure, (42) indicates a spring for urging the wire (32) in the pulling direction and for bringing the cam follower (41) into contact with the cam plate (40). Allows the cam follower (41) to move the ridge (4) of the cam plate (40).
0a) is in contact, slide the pipe shaft (30) of the speed ratio switching mechanism (19) in the direction of the cam plate (23) to increase the speed of the steering wheel speed increasing device (9). The cam follower (4
When 1) is in contact with the valley (40b), pull the wire (32) and slide the pipe shaft (30) through the lever (43) to slide the cam plate (23) and the upper and lower cam rollers. (29a) and (29b) are not forcibly contacted with each other, and the steering wheel speed increasing device (9) is forcibly held in a constant speed operation state.
なお、第2図中(a1)は前車軸ケース(36)の最大左右傾動
範囲、(a2)は予め設定した角度範囲で、前車軸ケース(3
6)の左右傾斜角度がこの範囲内にあるときだけ操向輪増
速装置(9)が増速作動状態となる。(a3)(a3)は同増速装
置(9)が強制的に等速作動状態になる角度範囲を示して
いる。In addition, in FIG. 2, (a1) is the maximum horizontal tilt range of the front axle case (36), (a2) is a preset angular range, and the front axle case (3
Only when the horizontal inclination angle of 6) is within this range, the steering wheel speed increasing device (9) is in the speed increasing operation state. (a3) (a3) shows the angular range in which the speed increasing device (9) is forced to operate at a constant speed.
なお図中、(33)はピットマンアーム(21a)と中間軸(22)
とを連結した中間リンク、(34)はドラグロッド、(35)は
管軸(30)の戻しバネを示す。In the figure, (33) is the pitman arm (21a) and the intermediate shaft (22).
An intermediate link connecting the and, (34) is a drag rod, and (35) is a return spring of the tube axis (30).
第1図は、本考案による安全装置の側面図(要部断
面)。 第2図は、同拡大側面図。 第3図は、速比切換機構の側面図。 第4図は、同平面図。 第5図は、操向輪増速装置の縦断面図。 第6図は、ステアリング系の側面図。 第7図は、本考案による安全装置を有するトラクターの
全体側面図。 (N):検出機構 (4):後輪 (5):フロントプロペラシャフト (6):ファイナルドライブ装置 (7):前輪 (8):ステアリングホイール (9):操向輪増速装置 (17):切換レバー (19):速比切換機構 (36):前車軸ケース (39a)(39b):揺動軸FIG. 1 is a side view of the safety device according to the present invention (cross section of a main part). FIG. 2 is an enlarged side view of the same. FIG. 3 is a side view of the speed ratio switching mechanism. FIG. 4 is a plan view of the same. FIG. 5 is a vertical sectional view of the steering wheel speed increasing device. FIG. 6 is a side view of the steering system. FIG. 7 is an overall side view of a tractor having a safety device according to the present invention. (N): Detection mechanism (4): Rear wheel (5): Front propeller shaft (6): Final drive device (7): Front wheel (8): Steering wheel (9): Steering wheel speed increasing device (17) : Switching lever (19): Speed ratio switching mechanism (36): Front axle case (39a) (39b): Swing shaft
Claims (1)
つ、前輪(7)のファイナルドライブ装置(6)と、フ
ロントプロペラシャフト(5)との間に速比切換可能の
操向輪増速装置(9)を介設して、ステアリングホイー
ル(8)と連動連結した速比切換機構(19)により操
向輪増速装置(9)を等速作動状態から増速作動状態に
切換えられるように構成した車輌において、前輪(7)
を支持した前車軸ケース(36)を、前後方向の揺動軸
(39a)(39b)を中心として左右傾動自在に枢支
し、機体と前車軸ケース(36)との間の相対的な左右
傾動角度を検出する検出機構(N)を配設し、検出機構
(N)と速比切換機構(19)とを連動連結して、上記
左右傾動角度が予め設定した角度よりも大となった時、
操向輪増速装置(9)を自動的に等速作動状態に保持さ
せるように構成してなる操向輪増速装置を有する車輌の
安全装置。1. A steering system capable of driving front and rear wheels (7) and (4) and capable of switching a speed ratio between a final drive device (6) of front wheels (7) and a front propeller shaft (5). The steering wheel speed increasing device (9) is changed from the constant speed operating state to the speed increasing operating state by the speed ratio switching mechanism (19) interlockingly connected to the steering wheel (8) through the wheel speed increasing device (9). Front wheels (7) in vehicles configured to be switched
The front axle case (36) supporting the shaft is pivotally supported so that the front axle case (36) can be tilted left and right about the swing shafts (39a) (39b) in the front-rear direction. The detection mechanism (N) for detecting the tilt angle is provided, and the detection mechanism (N) and the speed ratio switching mechanism (19) are interlockingly connected, so that the left and right tilt angles are larger than the preset angle. Time,
A vehicle safety device having a steering wheel speed increasing device (9) configured to automatically maintain a constant speed operation state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987143248U JPH0627465Y2 (en) | 1987-09-19 | 1987-09-19 | Safety device for vehicle having steering wheel speed increasing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987143248U JPH0627465Y2 (en) | 1987-09-19 | 1987-09-19 | Safety device for vehicle having steering wheel speed increasing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6447428U JPS6447428U (en) | 1989-03-23 |
JPH0627465Y2 true JPH0627465Y2 (en) | 1994-07-27 |
Family
ID=31409897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987143248U Expired - Lifetime JPH0627465Y2 (en) | 1987-09-19 | 1987-09-19 | Safety device for vehicle having steering wheel speed increasing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0627465Y2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61211135A (en) * | 1985-03-15 | 1986-09-19 | Kubota Ltd | Automatic diff-lock device of working vehicle |
JPS6255226A (en) * | 1985-09-03 | 1987-03-10 | Kubota Ltd | Travelling device for agricultural tractor |
-
1987
- 1987-09-19 JP JP1987143248U patent/JPH0627465Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6447428U (en) | 1989-03-23 |
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