JPH0210867Y2 - - Google Patents
Info
- Publication number
- JPH0210867Y2 JPH0210867Y2 JP7572484U JP7572484U JPH0210867Y2 JP H0210867 Y2 JPH0210867 Y2 JP H0210867Y2 JP 7572484 U JP7572484 U JP 7572484U JP 7572484 U JP7572484 U JP 7572484U JP H0210867 Y2 JPH0210867 Y2 JP H0210867Y2
- Authority
- JP
- Japan
- Prior art keywords
- shift rod
- shifter
- flat surface
- circular portion
- 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.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000009434 installation Methods 0.000 description 4
- 244000061456 Solanum tuberosum Species 0.000 description 3
- 235000002595 Solanum tuberosum Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 235000018694 Solanum laxum Nutrition 0.000 description 1
- 240000004488 Solanum wendlandii Species 0.000 description 1
- 235000000305 Solanum wendlandii Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Gear-Shifting Mechanisms (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、回転及び摺動操作自在なシフトロツ
ドの非真円形部分にシフターを嵌着し、前記シフ
トロツドの一端側で、ミツシヨンケースの有底孔
に嵌入した支持部分に、前記非真円形部分におけ
る互にほぼ平行な平坦面とほぼ面一に連なる平坦
面を形成し、支持部分の平坦面と有底孔の内周面
との間に形成される空間によつて、シフトロツド
摺動時に有底孔内のエアー抜きを行なつて摺動抵
抗を少なくするとともに、シフトロツド加工の工
程数を少なくするようにした変速装置のシフトロ
ツド構造に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention has a shifter fitted into a non-perfect circular portion of a shift rod that can be freely rotated and slidably operated, and a shifter that is attached to a transmission case at one end of the shift rod. A flat surface that is substantially flush with the mutually substantially parallel flat surfaces of the non-perfect circular portion is formed on the supporting portion fitted into the bottom hole, and between the flat surface of the supporting portion and the inner circumferential surface of the bottomed hole. This invention relates to a shift rod structure for a transmission in which air is removed from a bottomed hole during sliding of the shift rod using a space formed in the hole, thereby reducing sliding resistance and reducing the number of steps for machining the shift rod.
従来、上記変速装置において、第７図イ，ロに
示すように、シフター１８を嵌着したシフトロツ
ド１９の非真円形部分１９ａと、有底孔内に嵌入
する支持部分１９ｂとを、ほぼ同一断面形状に形
成していた。
Conventionally, in the above-mentioned transmission, as shown in FIGS. 7A and 7B, the non-circular portion 19a of the shift rod 19 into which the shifter 18 is fitted and the support portion 19b which fits into the bottomed hole have substantially the same cross section. It was formed into a shape.
しかし、シフター１８の取付ガタを少なくする
ために平坦面P′を巾広く形成すると、支持部分１
９ｂにおいて、平坦面P′と円周面S′とのエツジ角
θ′が小さくなり、シフトロツド１９回転時にエツ
ジと有底孔８ａ内周面とのコジレが生じ易くなつ
て、回転操作がし難くなる欠点があり、一方、回
転操作を容易に行なえるように平坦面P′を巾狭く
してその断面形状を円形に近くなるように形成す
ると、シフター１８の取付ガタが大きくなる欠点
があつた。
However, if the flat surface P' is made wider in order to reduce the play in the installation of the shifter 18, the supporting portion 1
9b, the edge angle θ' between the flat surface P' and the circumferential surface S' becomes small, and when the shift rod is rotated 19 times, the edge and the inner circumferential surface of the bottomed hole 8a tend to twist, making rotational operation difficult. On the other hand, if the width of the flat surface P' is narrowed to make the cross-sectional shape nearly circular in order to facilitate rotational operation, there is a drawback that the mounting play of the shifter 18 becomes large. .
本考案の目的は、上記実情に鑑み、シフターの
取付ガタを少なく、かつ、シフトロツド加工のた
めの工程数をできるだけ少なくしながら、シフト
ロツドの回転及び摺動操作をし易くすることにあ
る。 In view of the above-mentioned circumstances, an object of the present invention is to reduce the play in the installation of the shifter and to reduce the number of steps for machining the shift rod as much as possible while making it easier to rotate and slide the shift rod.
本考案によるシフトロツド構造の特徴構成は、
冒記変速装置において、シフトロツドの一端側
で、ミツシヨンケースの有底孔に嵌入した支持部
分の円周面を、その直径がシフターを嵌着した非
真円形部分の円周面の直径よりも小になるように
形成したことにあり、その作用効果は次のとおり
である。
The characteristic structure of the shift rod structure according to the present invention is as follows:
In the aforementioned transmission, on one end side of the shift rod, the diameter of the circumferential surface of the support part fitted into the bottomed hole of the transmission case is larger than the diameter of the circumferential surface of the non-perfect circular part into which the shifter is fitted. The reason is that it is formed to be small, and its functions and effects are as follows.
つまり、例えば第１図イ，ロに示すように、支
持部分１９ｂのみを非真円形部分１９ａよりも小
径d2＜d1に形成することによつて、支持部分１９
ｂにおける平坦面P2と円周面S2とのエツジ角θ
を大きくでき、その断面形状を、第７図ロに示す
従来構造に比して真円形に近くできるから、シフ
トロツド１９回転時の有底孔８ａ内壁との間のコ
ジレ発生が少ないのである。
That is, as shown in FIGS. 1A and 1B, for example, by forming only the support portion 19b to have a smaller diameter d 2 <d 1 than the non-perfect circular portion 19a, the support portion 19
Edge angle θ between flat surface P 2 and circumferential surface S 2 at b
Since the shift rod 19 can be made larger and its cross-sectional shape can be made closer to a perfect circle than the conventional structure shown in FIG.
しかも、支持部分１９ｂの平坦面P2と有底孔
８ａの内周面とによつて形成される空間によつ
て、シフトロツド１９摺動時の有底孔８ａ内のエ
アー抜きができ、さらに、その平坦面P2と非真
円形部分１９ａの平坦面P1とがほぼ面一に形成
されているから、一つの工程で加工できる。その
上、非真円形部分１９ａの平坦面P1は比較的巾
広く形成できるから、シフター１８の取付ガタも
少なくできる。 Furthermore, the space formed by the flat surface P2 of the support portion 19b and the inner peripheral surface of the bottomed hole 8a allows air to be vented from the bottomed hole 8a when the shift rod 19 slides. Since the flat surface P 2 and the flat surface P 1 of the non-perfect circular portion 19a are formed substantially flush with each other, processing can be performed in one step. Furthermore, since the flat surface P1 of the non-perfect circular portion 19a can be formed relatively wide, the mounting play of the shifter 18 can be reduced.
その結果、シフトロツドを、その摺動時の有底
孔内でのエアー抜きのために別加工を必要とする
ことなく形成できながら、シフトロツドの回転及
び摺動操作を少ない力で行なうことができ、しか
も、シフターの取付ガタも少ない操作性、加工
性、及びシフターの取付精度のいずれにおいても
優れたシフトロツド構造にできた。
As a result, the shift rod can be formed without the need for separate machining to remove air within the bottomed hole during sliding, and the rotation and sliding operations of the shift rod can be performed with less force. In addition, the shift rod structure is excellent in terms of operability, workability, and shifter installation accuracy with less play in the installation of the shifter.
以下に、図面に基づいて、本考案の実施例を説
明する。
Embodiments of the present invention will be described below based on the drawings.
第２図に示すように、乗用トラクターＡの前後
に、夫々シリンダ１，２により昇降操作自在なリ
ンク機構３，４を介して、イモ蔓切断装置Ｂとイ
モ堀り装置Ｃとを連結し、トラクターＡから両装
置Ｂ，Ｃに動力を伝達するように構成して、イモ
堀り機を構成してある。乗用トラクタＡにおい
て、ボンネツト５で覆つたエンジン６、主クラツ
チハウジング７、及びミツシヨンケース８を前後
に連結して形成した車体に、左右一対の駆動後輪
９と操向自在な左右一対の駆動車輪１０とを夫々
軸架し、車体上部に搭乗運転部１１及びステアリ
ングハンドル１２等を設けてある。 As shown in FIG. 2, a potato vine cutting device B and a potato digging device C are connected to the front and rear of a riding tractor A via link mechanisms 3 and 4 that can be raised and lowered by cylinders 1 and 2, respectively. A potato digging machine is constructed by transmitting power from tractor A to both devices B and C. In a passenger tractor A, a vehicle body formed by connecting an engine 6 covered by a bonnet 5, a main clutch housing 7, and a transmission case 8 in the front and rear, includes a pair of left and right drive rear wheels 9 and a pair of left and right drive wheels that can be freely steered. The wheels 10 are mounted on respective shafts, and a riding and operating section 11, a steering handle 12, etc. are provided on the upper part of the vehicle body.
第３図及び第４図に示すように、ミツシヨンケ
ース８内において、複数個のシフトギヤ１３を前
後に摺動させるシフトフオーク１４，１５を、
夫々支軸１６，１７に前後スライド自在に支承し
てある。両シフトフオーク１４，１５に連設した
係合部１４ａ，１５ａに選択係合するシフター１
８を、ミツシヨンケース８の有底孔８ａとボス部
８ｂとによつて回転及び摺動自在に横架支承した
シフトロツド１９の非真円形部分１９ａに嵌着
し、ピン２０によつて抜止めしてある。そして、
ミツシヨンケース８の外側壁に、シフトロツド軸
芯Ｘ周りで回動自在な支持アーム２１を装着し、
支持アーム２１の先端と、ミツシヨンケース８か
ら外方に突出したシフトロツド１９の先端とに
夫々枢支した変速レバー２２を、後車輪用フエン
ダー２３に付設したレバーガイド２４のＨ型案内
孔２４ａに挿通し、運転座席１１ａの側方に立設
配置してある。 As shown in FIGS. 3 and 4, shift forks 14 and 15 that slide a plurality of shift gears 13 back and forth are installed in the transmission case 8.
They are supported on support shafts 16 and 17, respectively, so as to be slidable back and forth. Shifter 1 selectively engages with engaging portions 14a and 15a connected to both shift forks 14 and 15
8 is fitted into the non-perfect circular portion 19a of the shift rod 19 which is rotatably and slidably supported horizontally by the bottomed hole 8a of the mission case 8 and the boss portion 8b, and is prevented from coming out by the pin 20. It has been done. and,
A support arm 21 is attached to the outer wall of the transmission case 8, and is rotatable around the shift rod axis X.
The shift lever 22, which is pivoted to the tip of the support arm 21 and the tip of the shift rod 19 protruding outward from the transmission case 8, is inserted into the H-shaped guide hole 24a of the lever guide 24 attached to the rear wheel fender 23. It is inserted through and placed upright on the side of the driver's seat 11a.
つまり、変速レバー２２の横方向動でボールス
トツパー２５に抗してシフトロツド１９を摺動
し、何れかのシフトフオーク１４又は１５の係合
部１４ａ又は１５ａにシフター１８を選択係合さ
せ、引続く変速レバー２２の前後動でシフトロツ
ド１９を軸芯Ｘ周りに回動し、シフター１８の揺
動によつてシフター１８が選択したシフトフオー
ク１４又は１５を前後にスライドさせ、シフトギ
ヤ１３を摺動して変速操作を行なうように構成し
てある。 That is, the shift rod 19 is slid against the ball stopper 25 by the lateral movement of the shift lever 22, and the shifter 18 is selectively engaged with the engaging portion 14a or 15a of either the shift fork 14 or 15, and the shifter 18 is pulled. The shift rod 19 is rotated around the axis X by the subsequent back and forth movement of the gear change lever 22, and the shift fork 14 or 15 selected by the shifter 18 is slid back and forth by the swinging of the shifter 18, and the shift gear 13 is slid. It is configured so that the gear change operation can be carried out using the following steps.
そして、第１図イ，ロに示すように、ミツシヨ
ンケース８の有底孔８ａに嵌入するシフトロツド
１９の支持部分１９ｂに互いにほぼ平行な平坦面
P2を形成し、そのクラツチハウジングP2と、断
面形状をほぼ円形に形成した有底孔８ａの内周面
との間に形成される空間によつて、シフトロツド
１９摺動時に有底孔８ａ内のエアー抜きを行なつ
てシフトロツド１９の摺動操作を抵抗少なく行な
えるように構成してある。また、その平坦面P2
を、シフター１８を嵌着したシフトロツド１９の
非真円形部分１９ａにおける、互いにほぼ平行な
平坦面P1とほぼ面一に連なるように形成し、シ
フトロツド１９加工のための工程数が少なくなる
ように構成してある。さらに、支持部分１９ｂの
円周面S2を、その直径d2が非真円形部分１９ａの
円周面S1の直径d1よりも小になるd2＜d1ように形
成し、支持部分１９ｂの断面形状を真円形に近く
してシフトロツド１９回転時のコジレを少なく
し、シフトロツド１９の回転操作を行ない易くす
るように構成してある。 As shown in FIG.
The space formed between the clutch housing P 2 and the inner circumferential surface of the bottomed hole 8a , which has a substantially circular cross-sectional shape, allows the bottomed hole 8a to close when the shift rod 19 slides. The shift rod 19 is constructed to allow sliding operation of the shift rod 19 with less resistance by removing air from the inside. Also, its flat surface P 2
is formed so as to be substantially flush with the mutually substantially parallel flat surface P1 of the non-perfect circular portion 19a of the shift rod 19 into which the shifter 18 is fitted, so that the number of steps for processing the shift rod 19 is reduced. It is configured. Furthermore, the circumferential surface S 2 of the support portion 19b is formed such that its diameter d 2 is smaller than the diameter d 1 of the circumferential surface S 1 of the non-perfect circular portion 19a such that d 2 <d 1 , and the support portion The cross-sectional shape of the shift rod 19b is made close to a perfect circle to reduce twisting when the shift rod 19 rotates, and to facilitate rotational operation of the shift rod 19.
第５図に示すように、トラクターＡの前後に設
けたリンク機構３，４を駆動する単動型シリンダ
１，２とエンジン６に付設した油圧ポンプ２６と
に亘る油圧回路に、シリンダ１，２の駆動を制御
するコントロールバルブ２７と、何れか一方のシ
リンダ１又は２、或は、双方のシリンダ１，２に
対して油路を連通する流路切替弁２８とを介装
し、その流路切替弁２８を、第４図に示すよう
に、ミツシヨンケース８に連設した一方のシリン
ダ２の上部に付設してある。第４図及び第６図に
示すように、ロータリー型の流路切替弁２８の揺
動操作アーム２９に、軸芯Ｙ周りで回動自在にミ
ツシヨンケース８に取付けた操作レバー３０の一
端を係合し、操作レバー３０の握り部３０ａを運
転座席１１ａの下方前方に突設し、もつて操作レ
バー３０の左右揺動で流路切替弁２８の切替操作
を行なえるように構成してある。操作レバー３０
に、その軸芯Ｙ周りでの揺動範囲をミツシヨンケ
ース８の外壁面Ｌとの接当により制限する金具３
１を付設し、操作レバー３０の揺動時に流路切替
弁２８に無理が掛からないように構成してある。 As shown in FIG. 5, cylinders 1 and 2 are connected to a hydraulic circuit extending between single-acting cylinders 1 and 2 that drive link mechanisms 3 and 4 provided at the front and rear of tractor A and a hydraulic pump 26 attached to engine 6. A control valve 27 that controls the drive of the cylinder 1 or 2, or a flow path switching valve 28 that communicates an oil path with either cylinder 1 or 2 or both cylinders 1 and 2 is installed. As shown in FIG. 4, the switching valve 28 is attached to the upper part of one cylinder 2 connected to the mission case 8. As shown in FIGS. 4 and 6, one end of an operating lever 30 attached to the mission case 8 so as to be rotatable around the axis Y is attached to the swing operating arm 29 of the rotary type flow switching valve 28. The grip portion 30a of the operating lever 30 is protruded downward and forward of the driver's seat 11a, so that the flow path switching valve 28 can be switched by swinging the operating lever 30 left and right. . Operation lever 30
and a metal fitting 3 that limits its swing range around the axis Y by contacting with the outer wall surface L of the mission case 8.
1 is attached so that no force is applied to the flow path switching valve 28 when the operating lever 30 swings.
次に、別の実施例を説明する。 Next, another example will be described.
シフトロツド１９の非真円形部分１９ａ及び支
持部分１９ｂにおいて、その平坦面P1，P2の巾
及びその円周面S1，S2の直径d1，d2等シフトロツ
ド１９各部の具体的寸法は適宜変更可能である。 In the non-perfectly circular portion 19a and the support portion 19b of the shift rod 19, the width of the flat surfaces P 1 and P 2 and the diameters d 1 and d 2 of the circumferential surfaces S 1 and S 2 , etc. The specific dimensions of each part of the shift rod 19 are as follows. It can be changed as appropriate.
本考案は、建設用や農用等、各種用途の作業装
置における変速装置のシフトロツド構造を対象と
するものである。 The present invention is directed to a shift rod structure of a transmission in a working device for various uses such as construction and agricultural use.
第１図イ乃至第６図は本考案に係る変速装置の
シフトロツド構造の実施例を示し、第１図イは要
部斜視図、第１図ロは第１図イにおける−線
断面図、第２図はイモ堀り機の全体側面図、第３
図は変速装置の一部切欠正面図、第４図は変速装
置の側面図、第５図は油圧回路図、第６図は第４
図における−線矢視図である。第７図イ，ロ
は従来例を示し、第７図イは第１図イに相当する
要部斜視図、第７図ロは第１図ロに相当する第７
図イにおける−線断面図である。
８……ミツシヨンケース、８ａ……有底孔、１
８……シフター、１９……シフトロツド、１９ａ
……非真円形部分、１９ｂ……支持部分、P1，
P2……平坦面、S1，S2……円周面、d1，d2……直
径。
1A to 6 show an embodiment of the shift rod structure of a transmission according to the present invention, in which FIG. 1A is a perspective view of the main part, FIG. Figure 2 is an overall side view of the potato digging machine, Figure 3
The figure is a partially cutaway front view of the transmission, Figure 4 is a side view of the transmission, Figure 5 is a hydraulic circuit diagram, and Figure 6 is the
It is a - line arrow view in a figure. 7A and 7B show the conventional example, FIG. 7A is a perspective view of the main part corresponding to FIG. 1B, and FIG.
FIG. 8...Mission case, 8a...Bottomed hole, 1
8...Shifter, 19...Shift rod, 19a
...Non-perfect circular part, 19b...Supporting part, P 1 ,
P 2 ... flat surface, S 1 , S 2 ... circumferential surface, d 1 , d 2 ... diameter.
Claims (1)
真円形部分１９ａにシフター１８を嵌着し、前記
シフトロツド１９の一端側で、ミツシヨンケース
８の有底孔８ａに嵌入した支持部分１９ｂに、前
記非真円形部分１９ａにおける互にほぼ平行な平
坦面P1とほぼ面一に連なる平坦面P2を形成した
変速装置において、前記支持部分１９ｂの円周面
S2を、その直径d2が前記非真円形部分１９ａの円
周面S1の直径d1よりも小にd2＜d1なるように形成
してある変速装置のシフトロツド構造。 The shifter 18 is fitted into the non-circular portion 19a of the shift rod 19 which can be freely rotated and slidably operated, and the non-circular portion 19b is inserted into the support portion 19b fitted into the bottomed hole 8a of the mission case 8 at one end of the shift rod 19. In a transmission in which a flat surface P 2 that is substantially flush with a flat surface P 1 that is substantially parallel to each other in a perfect circular portion 19 a is formed , the circumferential surface of the support portion 19 b is
A shift rod structure for a transmission, in which the diameter d 2 of S 2 is smaller than the diameter d 1 of the circumferential surface S 1 of the non-perfect circular portion 19a, such that d 2 <d 1 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7572484U JPS60187924U (en) | 1984-05-22 | 1984-05-22 | Shift rod structure of transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7572484U JPS60187924U (en) | 1984-05-22 | 1984-05-22 | Shift rod structure of transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60187924U JPS60187924U (en) | 1985-12-12 |
| JPH0210867Y2 true JPH0210867Y2 (en) | 1990-03-16 |
Family
ID=30617209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7572484U Granted JPS60187924U (en) | 1984-05-22 | 1984-05-22 | Shift rod structure of transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60187924U (en) |
-
1984
- 1984-05-22 JP JP7572484U patent/JPS60187924U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60187924U (en) | 1985-12-12 |
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