JPH06127282A - Speed change operation structure for working vehicle - Google Patents
Speed change operation structure for working vehicleInfo
- Publication number
- JPH06127282A JPH06127282A JP27960892A JP27960892A JPH06127282A JP H06127282 A JPH06127282 A JP H06127282A JP 27960892 A JP27960892 A JP 27960892A JP 27960892 A JP27960892 A JP 27960892A JP H06127282 A JPH06127282 A JP H06127282A
- Authority
- JP
- Japan
- Prior art keywords
- rod
- speed change
- swinging
- predetermined direction
- shift
- 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
Links
Landscapes
- Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、作業車の変速操作構造
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle gear shift operation structure.
【０００２】[0002]
【従来の技術】上記作業車の変速操作構造において、従
来では、例えば特開平２−２３７８２３号公報に示され
るように、操縦ハンドルの横側に上下方向に沿って操作
軸を配置するとともに、この操作軸に筒部を相対回動自
在に外嵌し、この操作軸に対して交差する軸芯周りで回
動自在に変速レバーを支持させ、操作軸と筒軸夫々に変
速レバーが択一的に係合する係合部材を設けるととも
に、操作軸と筒軸夫々の下端部に縦姿勢の一対の変速フ
ォーク軸を連動連係し、変速レバーを上下に切り換えて
操作対象を選択し、操作軸の軸芯周りでの回動で変速シ
フト操作を行うよう構成したものがあった。2. Description of the Related Art Conventionally, in a shift operation structure for a work vehicle, an operation shaft is arranged along a vertical direction on the side of a steering wheel as shown in, for example, Japanese Patent Laid-Open No. 2-237823. A tubular portion is fitted onto the operating shaft so as to be rotatable relative to the operating shaft, and a gear shift lever is supported rotatably around an axis intersecting with the operating shaft. In addition to providing an engaging member that engages with, the pair of vertically oriented shift fork shafts are interlockingly linked to the lower ends of the operating shaft and the cylinder shaft, and the shift lever is switched up and down to select the operation target. There has been a structure in which a gear shift operation is performed by turning around an axis.
【０００３】[0003]
【発明が解決しようとする課題】上記従来構造において
は、変速レバーと変速フォーク軸とを比較的簡単な構造
で連係させることができる利点はあるものの、複数の変
速フォーク軸を縦姿勢に設ける必要があり、一般に変速
用ギアは同一軸芯上に設けられるからミッションケース
内での変速フォーク軸とシフトフォークとの連係構造が
複雑になる欠点があった。又、前記操作軸はほぼ鉛直姿
勢で配設されるから、変速レバーを操縦ハンドルの下方
側に近接配置して操作性を向上させるよう構成すると、
操作軸の下部が運転部ステップの操縦者の足元に位置す
ることになり、操縦者の足元が狭くなる弊害があるとと
もに、乗り降りの際に引っ掛かるおそれもあり、未だ改
善の余地がある。本発明は上記不具合点を解消すること
を目的としている。The above conventional structure has the advantage that the gear shift lever and the gear shift fork shaft can be linked with each other by a relatively simple structure, but it is necessary to provide a plurality of gear shift fork shafts in a vertical posture. However, since the transmission gears are generally provided on the same axis, there is a drawback that the linkage structure between the transmission fork shaft and the shift fork in the transmission case becomes complicated. Further, since the operation shaft is arranged in a substantially vertical posture, if the speed change lever is arranged close to the lower side of the steering handle to improve the operability,
Since the lower part of the operation shaft is located at the foot of the driver in the driving step, the foot of the operator is narrowed and there is a possibility of getting caught when getting on and off, and there is still room for improvement. The present invention aims to eliminate the above-mentioned problems.
【０００４】[0004]
【課題を解決するための手段】本発明の特徴構成は、握
り操作部側の第１ロッドと変速装置側の第２ロッドとを
任意方向に屈曲自在に連動連結し、前記各ロッドの途中
部を夫々球面軸受を介して自由揺動自在に機体固定部に
支持するとともに、固定案内部に沿って係合案内して前
記第１ロッドの所定方向の揺動を許容し、かつ、前記所
定方向と交差する方向の揺動を許容するガイド部材を設
け、前記握り操作部の前記所定方向の揺動操作で変速装
置の変速操作具を選択し、前記交差する方向での揺動操
作で変速用シフト操作を行うよう構成してある点にあ
る。A characteristic configuration of the present invention is that a first rod on the side of a grip operating portion and a second rod on the side of a transmission are interlockingly connected in a freely bendable manner, and the middle portion of each rod is connected. Are respectively supported by a body fixing portion via spherical bearings so as to be freely swingable, and are engaged and guided along a fixed guide portion to allow the first rod to swing in a predetermined direction, and also to perform the predetermined direction. A guide member that allows swinging in a direction intersecting with is provided, a shift operation tool of the transmission is selected by swinging operation of the grip operation portion in the predetermined direction, and a shift operation is performed by swinging operation in the intersecting direction. It is configured to perform a shift operation.
【０００５】[0005]
【作用】第１ロッドがガイド部材により係合案内され動
きが許容される所定方向に揺動するよう握り操作部を手
動操作すると、第１ロッドは途中部での球面軸受の支持
部を支点として天秤揺動し、他端側に屈曲自在に連結さ
れた第２ロッドが途中部での球継手支持部を支点として
連動揺動して操作対象となる変速操作具が選択される。
次に、握り操作部を前記所定方向と交差する方向に操作
すると、第１ロッドがガイド部材によりその方向での揺
動が許容され、第２ロッドが連動揺動して選択された変
速操作具をシフト操作して変速が行われる。When the grip operating portion is manually operated so that the first rod is engaged and guided by the guide member and swings in a predetermined direction in which the movement is allowed, the first rod uses the support portion of the spherical bearing in the middle as a fulcrum. The shift operation tool to be operated is selected by swinging the balance and interlockingly swinging the second rod flexibly connected to the other end side with the ball joint support portion in the middle as a fulcrum.
Next, when the grip operating portion is operated in a direction intersecting with the predetermined direction, the guide member allows the first rod to swing in that direction, and the second rod interlocks and swings to be selected. Is operated to shift gears.
【０００６】[0006]
【発明の効果】従って、握り操作部と変速装置との距離
が比較的大きい場合であっても、自由屈曲自在に連結さ
れた複数のロッドを中間の支点周りで揺動させるだけの
操作で変速操作を行うことができ、ガタつきの少ない円
滑な変速操作が可能となり、変速操作軸が１本で済み、
複数の変速操作具との連係構造を簡単なものにできる。
又、例えば、握り操作部を操縦ハンドルの近くに配設す
る構成を採用しても、ロッドの配設方向に制約を受ける
ことが無いので、操縦者の足元の空間が狭くなる等の弊
害が生じない。Therefore, even if the distance between the grip operating portion and the transmission is relatively large, the speed change can be achieved by simply swinging the plurality of freely bendable rods around an intermediate fulcrum. It can be operated, smooth shift operation with less rattling is possible, only one shift operation shaft is required,
It is possible to simplify the linkage structure with a plurality of gear shift operation tools.
Further, for example, even if the configuration in which the grip operation section is arranged near the steering handle is adopted, there is no restriction in the arrangement direction of the rod, so that there is a problem that the space at the foot of the operator is narrowed. Does not happen.
【０００７】[0007]
【実施例】以下、実施例を図面に基いて説明する。図４
に作業車の一例である農用トラクタを示している。この
農用トラクタは、前後車輪１，２の中間部上方に運転部
３を備え、機体前部のボンネット４内にエンジン５を搭
載するとともに、このエンジン５の後部にミッションケ
ース６を連結して構成してある。次に、変速操作構造に
ついて説明する。前記ミッションケース６内の操縦ハン
ドル７の下方側箇所にギア式主変速装置８を内装してあ
り、この主変速装置８の変速レバーＡは操縦ハンドル７
の下方側近くに配置して、所謂コラムシフト形式に構成
してある。図１、図２に示すように、変速レバーＡを構
成する第１ロッド９の途中部を球継手１０を介して機体
固定部１１に自由回動自在に支持するとともに、この第
１ロッド９の下端部に任意方向に屈曲自在に第２ロッド
１２を連動連結してあり、この第２ロッド１２も同様に
途中部を球継手１３を介して機体固定部１１に自由回動
自在に支持してある。つまり、第１ロッド９の下端部に
筒部材１４を溶接固定するとともに、第２ロッド１２の
端部を球状に加工成形して、この球状部１２ａを前記筒
部材１４に差し込み連係させ、自由屈曲自在並びに軸芯
方向にスライド自在に連動連係してある。又、第２ロッ
ド１２の下端部も第１ロッド９と同様に筒部材１５を溶
接固定し、変速操作軸１６に一体的に連結した操作部材
１７の上部に形成した球状軸部１８に差し込み連係し、
自由屈曲自在並びに軸芯方向にスライド自在に連動連係
してある。第１ロッド９の上部は握り操作部１９が操縦
ハンドル７の横外方に位置するようくの字形に屈曲成形
してあり、第１ロッド９の下半部及び第２ロッド１２は
ほぼ上下方向に沿い、かつ、上方側ほど少し後方側に位
置する後傾斜姿勢に配設して、握り操作部１９を極力、
操縦者に近づけて操作を行い易いようにしながら、操縦
者の足元における運転部ステップ２０に広いスペースを
取れるようにしてある。変速操作軸１６は横向き姿勢で
ミッションケース６から横一側に突出状態で設けられ、
軸芯方向にスライドすることで２個の変速用シフトフォ
ーク２１，２２〔変速操作具の一例〕のうち操作対象と
なるものを選択し、その軸芯周りで回動することで選択
されたシフトフォークによりギア〔図示せず〕をシフト
操作して変速するよう構成してある。尚、図３に示すよ
うに、一方のシフトフォークのシフト操作により前進第
１速Ｆ１と後進状態Ｒとに切り換えられ、他方のシフト
フォークのシフト操作により前進第２速Ｆ２と前進第３
速Ｆ３の切り換えが行えるよう構成してある。Embodiments will be described below with reference to the drawings. Figure 4
Fig. 1 shows an agricultural tractor which is an example of a work vehicle. This agricultural tractor is provided with a driving unit 3 above the intermediate portion between the front and rear wheels 1, 2, an engine 5 is mounted in a hood 4 at the front of the machine body, and a mission case 6 is connected to the rear portion of the engine 5. I am doing it. Next, the shift operation structure will be described. A gear-type main transmission 8 is installed inside the mission case 6 at a position below the steering handle 7, and the gear shift lever A of the main transmission 8 is a steering handle 7.
It is arranged near the lower side of the so-called column shift type. As shown in FIGS. 1 and 2, the middle portion of the first rod 9 constituting the speed change lever A is supported by the body fixing portion 11 via the ball joint 10 so as to be freely rotatable, and the first rod 9 A second rod 12 is interlockingly connected to a lower end portion of the second rod 12 so as to be bendable in an arbitrary direction. Similarly, the second rod 12 also has an intermediate portion supported by a body fixing portion 11 via a ball joint 13 so as to be freely rotatable. is there. That is, the tubular member 14 is welded and fixed to the lower end portion of the first rod 9, the end portion of the second rod 12 is formed into a spherical shape, and the spherical portion 12a is inserted into the tubular member 14 to be linked and freely bent. It is interlockingly linked freely and slidably in the axial direction. Also, the lower end portion of the second rod 12 is welded and fixed to the tubular member 15 similarly to the first rod 9, and is inserted into the spherical shaft portion 18 formed on the operation member 17 integrally connected to the speed change operation shaft 16 so as to be linked. Then
It is linked so that it can be freely bent and slid in the axial direction. The upper portion of the first rod 9 is bent and formed in a dogleg shape so that the grip operating portion 19 is located laterally outward of the steering handle 7, and the lower half portion of the first rod 9 and the second rod 12 are substantially vertical. The grip operation part 19 is arranged as much as possible along with the rear tilted position, which is located slightly rearward as it goes upward.
A wide space can be provided in the driver's step 20 at the feet of the operator while the operator can easily perform the operation near the operator. The gear shift operation shaft 16 is provided in a horizontal posture so as to project laterally from the mission case 6 to one side.
By selecting one of the two shift shift forks 21 and 22 [an example of a shift operation tool] to be operated by sliding in the axial direction, the shift is selected by rotating around the axial center. A fork is used to shift gears (not shown) to shift gears. Incidentally, as shown in FIG. 3, the forward first speed F1 and the reverse state R are switched by the shift operation of one shift fork, and the second forward speed F2 and the forward third speed F1 are switched by the shift operation of the other shift fork.
The speed F3 can be switched.
【０００８】又、第１ロッド９の中間支点部の近くに該
ロッド９の所定方向の揺動を許容し、かつ、前記所定方
向と交差する方向の揺動を許容するガイド部材２３を取
付けてある。このガイド部材２３は板材を階段状に屈曲
成形し、上部段差面２３ａに第１ロッド９を貫通状態で
一体固定するとともに、他端側の下部段差面２３ｂには
切欠凹部２４を形成してある。切欠凹部２４が形成され
る下部段差面２３ｂは球継手１０による支点とほぼ同レ
ベルに位置するよう配置され、この切欠凹部２４が機体
固定部１１に縦方向に沿って形成した案内軸部２５〔固
定案内部の一例〕に係合して上下方向の揺動を許容する
よう構成してある。又、切欠凹部２４の幅は案内軸部２
５の外径よりも少し大きく設定して間隙を形成し、ガイ
ド部材２３の間隙相当分の捻り作動により球継手１０を
支点として前後方向の揺動をも許容する構成としている
〔図３参照〕。従って、第１ロッド９における横向き姿
勢の握り操作部１９を上下方向に操作すると、前記ガイ
ド部材２３の切欠凹部２４が案内軸部２５に沿って係合
案内されて揺動し、第２ロッド１２が連動揺動して変速
操作軸１６が軸芯方向にスライドしてシフトフォークが
選択され、いずれかを選択した状態で握り操作部１９を
前後に揺動すると、ガイド部材２３の切欠凹部２４の捻
り作動でその揺動が許容され、変速操作軸１６が回動し
てギアがスライドして変速が行われる。A guide member 23 is mounted near the intermediate fulcrum of the first rod 9 to allow the rod 9 to swing in a predetermined direction and to swing in a direction intersecting with the predetermined direction. is there. The guide member 23 is formed by bending a plate material in a stepwise manner, integrally fixing the first rod 9 to the upper step surface 23a in a penetrating state, and forming a notch recess 24 in the lower step surface 23b on the other end side. . The lower step surface 23b in which the notch recess 24 is formed is arranged so as to be positioned at substantially the same level as the fulcrum of the ball joint 10, and the notch recess 24 is formed in the machine body fixing portion 11 along the longitudinal direction of the guide shaft portion 25 [. An example of a fixed guide portion] is configured to be allowed to swing in the vertical direction. Further, the width of the cutout recess 24 is equal to that of the guide shaft portion 2.
5 is set to be slightly larger than the outer diameter to form a gap, and the guide member 23 is twisted by an amount corresponding to the gap to allow swinging in the front-rear direction about the ball joint 10 as a fulcrum (see FIG. 3). . Therefore, when the laterally-oriented gripping operation portion 19 of the first rod 9 is operated in the up-down direction, the notch recess 24 of the guide member 23 is engaged and guided along the guide shaft portion 25 to swing, and the second rod 12 Interlockingly swings to shift the shift operation shaft 16 in the axial direction to select the shift fork, and swinging the grip operating portion 19 back and forth with any one selected, the notch recess 24 of the guide member 23 The twisting operation allows the swing, and the gear shift operation shaft 16 rotates and the gear slides to shift gears.
【０００９】前記第２ロッド１２と前記操作部材１７と
の間に、中間部を球継手により支持された別のロッドを
連動連係した状態で介装してもよい。Another rod having an intermediate portion supported by a ball joint may be interposed between the second rod 12 and the operating member 17 in a linked state.
【００１０】尚、特許請求の範囲の項に図面との対照を
容易にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。It should be noted that reference numerals are added to the claims to facilitate the comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.
【図１】変速操作系を示す一部切欠後面図FIG. 1 is a partially cutaway rear view showing a gear shift operation system.
【図２】変速操作系を示す一部切欠側面図FIG. 2 is a partially cutaway side view showing a shift operation system.
【図３】ガイド部材取付け部の切欠平面図FIG. 3 is a cutaway plan view of a guide member mounting portion.
【図４】農用トラクタの全体側面図FIG. 4 is an overall side view of an agricultural tractor.
８ 変速装置 ９ 第１ロッド １０，１３ 球継手 １２ 第２ロッド １９ 握り操作部 ２１，２２ 変速操作具 ２３ ガイド部材 ２５ 固定案内部 8 Gearbox 9 1st rod 10,13 Ball joint 12 2nd rod 19 Grip operation part 21,22 Gearshift operation tool 23 Guide member 25 Fixed guide part
Claims (1)
（９）と変速装置（８）側の第２ロッド（１２）とを任
意方向に屈曲自在に連動連結し、前記各ロッド（９），
（１２）の途中部を夫々球面軸受（１０），（１３）を
介して自由揺動自在に機体固定部（１１）に支持すると
ともに、固定案内部（２５）に沿って係合案内して前記
第１ロッド（９）の所定方向の揺動を許容し、かつ、前
記所定方向と交差する方向の揺動を許容するガイド部材
（２３）を設け、前記握り操作部（１９）の前記所定方
向の揺動操作で変速装置（８）の変速操作具（２１），
（２２）を選択し、前記交差する方向での揺動操作で変
速用シフト操作を行うよう構成してある作業車の変速操
作構造。1. A first rod (9) on the side of a grip operating portion (19) and a second rod (12) on the side of a transmission (8) are interlockingly connected in a freely bendable manner, and each rod (9). ),
The intermediate part of (12) is supported by the body fixing part (11) so as to be freely swingable via spherical bearings (10) and (13), and is engaged and guided along the fixed guide part (25). A guide member (23) that allows the first rod (9) to swing in a predetermined direction and also to swing in a direction intersecting the predetermined direction is provided, and the predetermined portion of the grip operation part (19) is provided. By the swinging operation in the direction, the gear shift operation tool (21) of the transmission (8),
(22) is selected, and a shift operation structure of a work vehicle configured to perform a shift operation for shifting by swinging operation in the intersecting direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27960892A JPH06127282A (en) | 1992-10-19 | 1992-10-19 | Speed change operation structure for working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27960892A JPH06127282A (en) | 1992-10-19 | 1992-10-19 | Speed change operation structure for working vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06127282A true JPH06127282A (en) | 1994-05-10 |
Family
ID=17613360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27960892A Pending JPH06127282A (en) | 1992-10-19 | 1992-10-19 | Speed change operation structure for working vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06127282A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006218944A (en) * | 2005-02-09 | 2006-08-24 | Kubota Corp | Shift operation structure of farm working machinery |
| WO2008001516A1 (en) * | 2006-06-28 | 2008-01-03 | Yanmar Co., Ltd. | Operation link structure |
-
1992
- 1992-10-19 JP JP27960892A patent/JPH06127282A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006218944A (en) * | 2005-02-09 | 2006-08-24 | Kubota Corp | Shift operation structure of farm working machinery |
| WO2008001516A1 (en) * | 2006-06-28 | 2008-01-03 | Yanmar Co., Ltd. | Operation link structure |
| CN101466567A (en) * | 2006-06-28 | 2009-06-24 | 洋马株式会社 | Operating level structure |
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