JPS622669Y2 - - Google Patents
Info
- Publication number
- JPS622669Y2 JPS622669Y2 JP1981008330U JP833081U JPS622669Y2 JP S622669 Y2 JPS622669 Y2 JP S622669Y2 JP 1981008330 U JP1981008330 U JP 1981008330U JP 833081 U JP833081 U JP 833081U JP S622669 Y2 JPS622669 Y2 JP S622669Y2
- Authority
- JP
- Japan
- Prior art keywords
- shifter
- transmission shaft
- key
- shaft
- engagement
- 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 43
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Landscapes
- Control Of Transmission Device (AREA)
- Mechanical Control Devices (AREA)
Description
【考案の詳細な説明】
本考案はシフト装置におけるシフタの位置決め
機構に関し、錆付く惧れをなくすと共に、構造簡
単にして部品点数の減少とコンパクト化を図るこ
とを目的とする。[Detailed Description of the Invention] The present invention relates to a shifter positioning mechanism in a shift device, and aims to eliminate the risk of rust and to simplify the structure to reduce the number of parts and make it more compact.
伝動ケース内に軸架された伝動軸にシフタを相
対回転不能として軸方向に摺動自在に外嵌したシ
フト装置では、伝動軸上のシフタを軸心方向に操
作するために、伝動ケースにレバー軸を回動自在
に挿支し、このレバー軸にシフトフオークを固定
して、該シフトフオークによりシフタを操作する
ように構成する。処で、上記のようなシフト装置
では、シフタを各シフト位置に保持するために位
置決め機構が必要であり、従来においては、その
位置決め機構として、該機構をレバー軸に連動さ
れた操作系に備えた外装式と、該機構をシフトフ
オークに内装した内装式との2種類があつた。然
し乍ら、上記両者はどちらも部品点数が多いと云
う欠点があると共に、外装式のものは錆付き易す
いと云う短所もあり、また、内装式のものでは、
シフトフオークが大型化して、シフト装置全体が
大型化すると云う問題点もあつた。 In a shift device in which a shifter is fitted externally to a transmission shaft mounted in a transmission case so that it cannot rotate relative to it and can freely slide in the axial direction, a lever is attached to the transmission case in order to operate the shifter on the transmission shaft in the axial direction. A shaft is rotatably inserted and supported, a shift fork is fixed to the lever shaft, and the shifter is operated by the shift fork. However, in the above-mentioned shift device, a positioning mechanism is required to hold the shifter at each shift position, and conventionally, the positioning mechanism is provided in an operating system linked to a lever shaft. There were two types: an external type with the mechanism installed inside the shift fork, and an internal type with the mechanism installed inside the shift fork. However, both of the above have the disadvantage of having a large number of parts, and the external type also has the disadvantage of being easily rusted, and the internal type has the disadvantage that it has a large number of parts.
There was also the problem that the shift fork became larger and the entire shift device became larger.
本考案は上記問題点を解決したものであつて、
その特徴とする処は、伝動軸にシフタを外嵌し
て、伝動軸外周部に備えられたキーを、シフタ内
周部に形成されたキー溝に軸方向に相対摺動自在
に係合することで、伝動軸にシフタを相対回転不
能で且つ軸方向に摺動自在に備えたものにおい
て、
伝動軸のシフタ外嵌部分に、一端部がキーによ
り閉塞状とされ且つ他端部が伝動軸の外周面で開
口する装備孔を径方向に形成し、装備孔の上記他
端部に係合片を径方向外方に対して出退自在に備
え、装備孔に、キーと係合片間に弾発状に介装さ
れる弾機を内装し、シフタ内周部に、係合片が係
脱自在に係合されてシフタが各シフト位置に位置
決めされる複数の係合凹部を軸方向に配設した点
にある。 This invention solves the above problems, and
The feature is that a shifter is fitted onto the transmission shaft, and a key provided on the outer circumference of the transmission shaft is engaged with a key groove formed on the inner circumference of the shifter so as to be relatively slidable in the axial direction. Therefore, in a transmission shaft in which a shifter is not relatively rotatable but is slidable in the axial direction, one end of the shifter fitting portion of the transmission shaft is closed by a key, and the other end is closed by a key. An equipment hole is formed in the radial direction that opens on the outer peripheral surface of the equipment hole, and an engagement piece is provided at the other end of the equipment hole so as to be able to move outward in the radial direction. The inner peripheral part of the shifter is provided with a plurality of engagement recesses in which engagement pieces are releasably engaged to position the shifter at each shift position. It is located at the point located at
以下、本考案の一実施例を第1図及び第2図の
図面に基き説明すれば、図面はトラクタ車体の下
腹部から前輪駆動用の動力を取出すミツドPTO
装置を例示する。第1図及び第2図において、1
はトラクタ車体を構成するミツシヨンケースで、
後輪に動力を伝達する走行変速装置(図示せず)
が内蔵されると共に、後部PTO軸(図示せず)
に動力を伝達するPTO伝動軸2が軸架され、ま
たそのPTO伝動軸2上には、走行変速装置の伝
動ギヤーに常時咬合する遊転ギヤー3がニードル
軸受4等を介して支持されている。5はミツシヨ
ンケース1の下側面に、その開口6を塞ぐように
装着された伝動ケースであり、この伝動ケース5
には、前後一対のボール軸受7,8を介して伝動
軸9が軸架される。伝動軸9は伝動ケース5より
前方に突出し、前輪駆動系に推進軸等を介して連
動連結され、伝動軸9及び推進軸は筒状カバー1
0により覆被されている。このカバー10後端部
は伝動ケース5の前方に突出する筒状部11内に
挿脱自在に挿入され、該後端に他の部分より大径
状とされた大径部12が形成されている。そし
て、筒状部11下端部には幅方向にボルト13が
挿通され、このボルト13と大径部12との接当
によりカバー10の筒状部11からの脱落が防止
されている。また、大径部12の溝部14にはシ
ール15が嵌装されている。ところで、伝動軸9
にはシフタ16が外嵌され、このシフタ16内周
部に前後方向に形成されたキー溝17が伝動軸9
に固設されたキー18に係合されることで、シフ
タ16が伝動軸9に相対回転可能として軸方向に
摺動自在に備えられている。なお、シフタ16を
伝動軸9にスプライン結合してもよい。 Hereinafter, one embodiment of the present invention will be explained based on the drawings shown in Figs.
The device is illustrated. In Figures 1 and 2, 1
is the transmission case that makes up the tractor body.
Traveling transmission that transmits power to the rear wheels (not shown)
is built-in, and the rear PTO shaft (not shown)
A PTO transmission shaft 2 that transmits power is mounted on the shaft, and an idling gear 3 that constantly meshes with the transmission gear of the traveling transmission is supported on the PTO transmission shaft 2 via a needle bearing 4 or the like. . Reference numeral 5 denotes a transmission case mounted on the lower side of the transmission case 1 so as to close the opening 6.
A transmission shaft 9 is mounted on the transmission shaft 9 via a pair of front and rear ball bearings 7, 8. The transmission shaft 9 projects forward from the transmission case 5 and is interlocked and connected to the front wheel drive system via a propulsion shaft, etc., and the transmission shaft 9 and the propulsion shaft are connected to the cylindrical cover 1.
covered by 0. The rear end of this cover 10 is removably inserted into a cylindrical part 11 protruding forward of the transmission case 5, and a large diameter part 12 having a larger diameter than other parts is formed at the rear end. There is. A bolt 13 is inserted through the lower end of the cylindrical portion 11 in the width direction, and the contact between the bolt 13 and the large diameter portion 12 prevents the cover 10 from falling off from the cylindrical portion 11. Further, a seal 15 is fitted into the groove portion 14 of the large diameter portion 12. By the way, the transmission shaft 9
A shifter 16 is fitted onto the outside of the shifter 16, and a keyway 17 formed in the front-rear direction on the inner circumference of the shifter 16 is inserted into the transmission shaft 9.
By being engaged with a key 18 fixed to the transmission shaft 9, the shifter 16 is provided so as to be rotatable relative to the transmission shaft 9 and slidable in the axial direction. Note that the shifter 16 may be spline-coupled to the transmission shaft 9.
而して、シフタ16は遊転ギヤー3に咬合うギ
ヤー部19を有し、シフタ16の軸方向の摺動に
よりギヤー部19は遊転ギヤー3に対して係脱さ
れる。伝動軸9のシフタ外嵌部分には、一端がキ
ー18により閉塞状とされる装備孔20が径方向
に貫通形成され、装備孔20のキー側とは反対側
の外端部にボールにて例示する係合片21が径方
向外方に対して出退自在に備えられている。ま
た、装備孔20内においては、キー18と係合片
21間にコイルバネにて例示する弾機22が弾発
状に介装され、これにより、係合片21は径方向
外方側に付勢されて、シフタ16内周部に圧接さ
れている。また、シフタ16内周部には、周溝に
て例示する前後一対の係合凹部23,24が軸方
向に並設され、これら係合凹部23,24に係合
片21が係脱自在に係合されることで、シフタ1
6は断接各シフト位置に位置決め保持される。2
5は伝動ケース5に回動自在に挿支されたレバー
軸で、該レバー軸25には外端にレバー26、内
端にシフトフオーク27が夫々固定されている。
28はシールである。レバー26はロツド29を
介して運転席近傍の操作レバーに連結される。シ
フトフオーク27は平板状で、上端部に、シフタ
16の周溝30に係合するピン31が挿通固着さ
れている。 Thus, the shifter 16 has a gear portion 19 that engages with the idling gear 3, and the gear portion 19 is engaged with and disengaged from the idling gear 3 by sliding the shifter 16 in the axial direction. An equipment hole 20 whose one end is closed by the key 18 is formed through the shifter external fitting portion of the transmission shaft 9 in the radial direction. The illustrated engagement piece 21 is provided so as to be able to move outward in the radial direction. In addition, in the equipment hole 20, an elastic spring 22, which is illustrated as a coil spring, is inserted between the key 18 and the engagement piece 21, so that the engagement piece 21 is attached to the outside in the radial direction. It is pressed against the inner circumferential portion of the shifter 16. Furthermore, a pair of front and rear engagement recesses 23 and 24, exemplified by circumferential grooves, are arranged in parallel in the axial direction on the inner circumference of the shifter 16, and the engagement piece 21 can be freely engaged and detached from these engagement recesses 23 and 24. By being engaged, shifter 1
6 is positioned and held at each shift position of connection and disconnection. 2
A lever shaft 5 is rotatably inserted and supported in the transmission case 5, and a lever 26 is fixed to the outer end of the lever shaft 25, and a shift fork 27 is fixed to the inner end of the lever shaft 25.
28 is a seal. The lever 26 is connected via a rod 29 to an operating lever near the driver's seat. The shift fork 27 has a flat plate shape, and a pin 31 that engages with the circumferential groove 30 of the shifter 16 is inserted and fixed at the upper end.
上記構成において、ロツド29を介してレバー
26を押下げれば、レバー軸25廻りにシフトフ
オーク27が反時計方向に回動し、シフタ16が
前方に摺動して、第1図の実線で示す接シフト位
置に達し、シフタ16のギヤ部19は遊転ギヤー
3と咬合う。従つて、遊転ギヤー3、シフタ1
6、キー18を介して、エンジンから伝動軸9へ
と動力を伝達でき、前輪を駆動できる。この時、
係合片21は後側係合凹部24に係合して、シフ
タ16を接シフト位置で位置決め保持する。次
に、ロツド29を上方に引上げれば、レバー2
6、シフトフオーク27がレバー軸25廻りに時
計方向に回動し、シフタ16が後方側に摺動し
て、第1図の仮想線で示す断シフト位置に達し、
シフタ16のギヤー部19と遊転ギヤー3との咬
合いが解除されるので、前輪側への動力伝達は遮
断される。この際において、シフタ16の摺動に
対応して、係合片21は弾機22を圧縮させつつ
後側係合凹部24から離脱し、シフタ16内周面
を相対摺動して、前側係合凹部23に係合するの
であり、これにより、シフタ16は断シフト位置
に位置決め保持される。ところで、上記の場合に
おいては、伝動軸9の装備孔20内に弾機22に
より付勢された係合片21を備え、該係合片21
をシフタ16内周部の係合凹部23,24に係脱
自在として、位置決め機構を伝動軸9及びシフタ
16に内装状としているので、位置決め機構が錆
付いたりする惧れがないと共に、装置全体をコン
パクト化できる。また、位置決め機構として追加
する部材は、係合片21と弾機22だけであり、
他は伝動軸9及びシフタ16の簡単な機械加工に
より処理できるようにしているから、従来より構
造は簡単であり、また、部品点数も低減できる。 In the above configuration, when the lever 26 is pushed down via the rod 29, the shift fork 27 rotates counterclockwise around the lever shaft 25, and the shifter 16 slides forward, as shown by the solid line in FIG. When the shift position is reached, the gear portion 19 of the shifter 16 meshes with the idle gear 3. Therefore, idle gear 3, shifter 1
6. Via the key 18, power can be transmitted from the engine to the transmission shaft 9, and the front wheels can be driven. At this time,
The engagement piece 21 engages with the rear engagement recess 24 to position and hold the shifter 16 at the contact shift position. Next, if you pull up the rod 29, lever 2
6. The shift fork 27 rotates clockwise around the lever shaft 25, and the shifter 16 slides rearward to reach the disengaged shift position shown by the imaginary line in FIG.
Since the gear portion 19 of the shifter 16 and the idle gear 3 are disengaged, power transmission to the front wheels is interrupted. At this time, in response to the sliding of the shifter 16, the engaging piece 21 disengages from the rear engaging recess 24 while compressing the bullet 22, relatively slides on the inner circumferential surface of the shifter 16, and engages the front engaging piece 21. The shifter 16 is engaged with the mating recess 23, whereby the shifter 16 is positioned and held at the disengaged shift position. By the way, in the above case, the engagement piece 21 biased by the bullet 22 is provided in the installation hole 20 of the transmission shaft 9, and the engagement piece 21
Since the positioning mechanism is built into the transmission shaft 9 and the shifter 16 so that it can be freely engaged and disengaged from the engagement recesses 23 and 24 on the inner circumference of the shifter 16, there is no risk that the positioning mechanism will rust, and the entire device will be protected. Can be made compact. Further, the only members added as a positioning mechanism are the engagement piece 21 and the bullet 22,
Since the other parts can be processed by simple machining of the transmission shaft 9 and shifter 16, the structure is simpler than before, and the number of parts can be reduced.
なお、第3図に示すように、伝動軸9に径方向
に貫通形成した装備孔20の径方向両端部とキー
18とを周方向に関してずらせば、装備孔20に
内装する弾機22として、上記実施例よりも自然
長の長いものを使用することもできる。 As shown in FIG. 3, if both radial ends of the equipment hole 20 formed through the transmission shaft 9 in the radial direction and the key 18 are shifted in the circumferential direction, the ammunition 22 installed in the equipment hole 20 can be It is also possible to use a material with a longer natural length than the above embodiment.
なお、実施例においては係合片としてボールを
用い、周溝を係合凹部としたが、係合片は球形状
でなくてもよく、また、係合凹部は周溝以外の形
状であつてもよい。 In addition, in the embodiment, a ball was used as the engagement piece and the circumferential groove was used as the engagement recess, but the engagement piece does not have to be spherical, and the engagement recess may have a shape other than the circumferential groove. Good too.
以上詳述したように、本考案は、伝動軸の装備
孔内に弾機により付勢された係合片を備え、該係
合片をシフタ内周部の係合凹部に係脱自在とし
て、位置決め機構を伝動軸及びシフタに内装状に
構成しているので、位置決め機構が錆付いたりす
る惧れがないと共に、構造が簡単であり、部品点
数も少なく、コンパクト化することができる。 As described in detail above, the present invention includes an engagement piece biased by a bullet in the installation hole of the transmission shaft, and the engagement piece is freely engaged and detached from the engagement recess on the inner circumference of the shifter. Since the positioning mechanism is constructed internally in the transmission shaft and shifter, there is no risk that the positioning mechanism will rust, and the structure is simple, with a small number of parts, and can be made compact.
又、装備孔の一端部をキーにより閉塞状とし
て、装備孔内の弾機をキーと係合片間に弾発状に
介装したので、弾機における係合片とは反対側端
部を、確実且つ安定した状態で受止めることがで
き、弾機の上記反対側端部がこじれたりする惧れ
がないと共に、弾機の上記反対側端部を受止める
ために、別途、部材を備えたりする必要もない。
更に、弾機の弾発力により、キーのがたつきもな
くせる。 Also, one end of the equipment hole is closed with a key, and the ammunition in the equipment hole is inserted between the key and the engagement piece in a spring-like manner, so that the end of the equipment hole opposite to the engagement piece is closed. , the bullet can be received in a reliable and stable state, there is no risk that the opposite end of the bullet will be twisted, and a separate member is provided to receive the opposite end of the bullet. There's no need to do that.
Furthermore, the force of the bullet prevents the keys from rattling.
第1図は本考案の一実施例を示す断面図、第2
図は第1図のAーA線矢視断面図、第3図は本考
案の比較例を示す断面図である。
1……ミツシヨンケース、5……伝動ケース、
9……伝動軸、16……シフタ、18……キー、
20……装備孔、21……係合片、22……弾
機、23,24……係合凹部。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is a sectional view showing a comparative example of the present invention. 1...Mission case, 5...Transmission case,
9...Transmission shaft, 16...Shifter, 18...Key,
20...equipment hole, 21...engaging piece, 22...munition machine, 23, 24...engaging recess.
Claims (1)
えられたキーを、シフタ内周部に形成されたキー
溝に軸方向に相対摺動自在に係合することで、伝
動軸にシフタを相対回転不能で且つ軸方向に摺動
自在に備えたものにおいて、 伝動軸のシフタ外嵌部分に、一端部がキーによ
り閉塞状とされ且つ他端部が伝動軸の外周面で開
口する装備孔を径方向に形成し、装備孔の上記他
端部に係合片を径方向外方に対して出退自在に備
え、装備孔に、キーと係合片間に弾発状に介装さ
れる弾機を内装し、シフタ内周部に、係合片が係
脱自在に係合されてシフタが各シフト位置に位置
決めされる複数の係合凹部を軸方向に配設したこ
とを特徴とするシフト装置におけるシフタの位置
決め機構。[Claim for Utility Model Registration] A shifter is fitted onto the transmission shaft, and a key provided on the outer periphery of the transmission shaft is engaged with a key groove formed on the inner periphery of the shifter so as to be relatively slidable in the axial direction. By doing so, in a device in which the shifter is provided on the transmission shaft so as to be non-rotatable relative to each other and slidable in the axial direction, one end of the shifter fitting portion of the transmission shaft is closed with a key, and the other end is closed with a key. An equipment hole that opens on the outer circumferential surface of the shaft is formed in the radial direction, an engagement piece is provided at the other end of the equipment hole so as to be able to move outward in the radial direction, and a key and the engagement piece are provided in the equipment hole. A plurality of engagement recesses are provided in the inner circumference of the shifter, and engagement pieces are releasably engaged to position the shifter at each shift position. A shifter positioning mechanism in a shift device, characterized in that the shifter is arranged in the direction of the shifter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1981008330U JPS622669Y2 (en) | 1981-01-21 | 1981-01-21 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1981008330U JPS622669Y2 (en) | 1981-01-21 | 1981-01-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57123522U JPS57123522U (en) | 1982-08-02 |
JPS622669Y2 true JPS622669Y2 (en) | 1987-01-22 |
Family
ID=29806482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1981008330U Expired JPS622669Y2 (en) | 1981-01-21 | 1981-01-21 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS622669Y2 (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55165320U (en) * | 1979-05-08 | 1980-11-27 |
-
1981
- 1981-01-21 JP JP1981008330U patent/JPS622669Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS57123522U (en) | 1982-08-02 |
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