JPH0721944Y2 - PTO take-out structure of agricultural work machine with key shift mission - Google Patents
PTO take-out structure of agricultural work machine with key shift missionInfo
- Publication number
- JPH0721944Y2 JPH0721944Y2 JP17132788U JP17132788U JPH0721944Y2 JP H0721944 Y2 JPH0721944 Y2 JP H0721944Y2 JP 17132788 U JP17132788 U JP 17132788U JP 17132788 U JP17132788 U JP 17132788U JP H0721944 Y2 JPH0721944 Y2 JP H0721944Y2
- Authority
- JP
- Japan
- Prior art keywords
- gear
- transmission shaft
- pto
- speed gear
- work machine
- 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
- Gear-Shifting Mechanisms (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は,キーシフトミッションを有する農作業機の
PTO取出構造に関するものである。[Detailed Description of the Invention] [Industrial field of application] This invention relates to an agricultural work machine having a key shift mission.
It is related to the PTO extraction structure.
キーシフトミッションは小さいスパン間に多くの変速段
数を設置できることから,小型小馬力の農作業機のミッ
ション等によく使用されている(特開昭62-237143号,
特開昭62-237146号)。Key shift missions are often used in missions for small horsepower agricultural work machines, etc., because many gears can be installed in a small span (Japanese Patent Laid-Open No. 62-237143,
JP-A-62-237146).
ところで,このような農作業機では,安全面等を考慮し
てその作業は低速変速域で行うように設定してある。し
かし,人間の操作することには誤りもあり,高速域で作
業部への伝動クラッチを操作したりすることもある。し
たがって,このようなことがないように,高速域では作
業機のクラッチが入らないような牽制装置を設けたりし
なければならなかった。By the way, in such an agricultural work machine, the work is set to be performed in the low speed shift range in consideration of safety and the like. However, there is an error in human operation, and sometimes the transmission clutch to the working unit is operated in the high speed range. Therefore, in order to prevent this from happening, it was necessary to install a restraint device that would prevent the clutch of the work machine from engaging in the high speed range.
そこで,この考案は,走行系へ動力伝動する走行ギアを
固嵌した伝動軸に常時回転させられる高速ギアと低速ギ
アを遊嵌するとともに,前記伝動軸に係合部を形成した
レバーキーをスライド可能に固嵌し,該係合部を前記高
速ギアと低速ギアそれぞれに形成された係合溝に選択係
合することで前記伝動軸から前記走行系へ高低二つの回
転数で動力を伝達するキーシフトミッションを有する農
作業機において,前記伝動軸に作業系に動力を付与する
PTOギアを遊嵌するとともに、前記レバーキーに,前記
係合部が前記低速ギアの係合溝に係合したときのみ,前
記PTOギアに形成された係合溝に係合する係合部)を形
成することで前記伝動軸から前記作業系に動力を伝達す
ることを特徴とするキーシフトミッションを有する農作
業機のPTO取出構造を提供することで,前記した課題を
解決したものである。Therefore, in this invention, a high-speed gear and a low-speed gear, which are constantly rotated, are loosely fitted to a transmission shaft in which a traveling gear for transmitting power to a traveling system is fixed, and a lever key having an engaging portion formed on the transmission shaft is slidable. Key shift for transmitting power from the transmission shaft to the traveling system at two rotational speeds of high and low by selectively engaging the engaging portions with engaging grooves formed in the high speed gear and the low speed gear, respectively. In an agricultural work machine having a mission, power is applied to the work system on the transmission shaft.
While the PTO gear is loosely fitted, the lever key is provided with an engaging portion that engages with the engaging groove formed in the PTO gear only when the engaging portion engages with the engaging groove of the low speed gear. The above problem is solved by providing a PTO take-out structure of an agricultural work machine having a key shift mission characterized by transmitting power from the transmission shaft to the work system by forming the PTO.
以上の手段をとることにより、レバーキーの一つの係合
部がPTOギアと係合するのは、他の係合部が低速ギアに
係合しているときのみに設定されているから,作業系へ
クラッチが入るのは低速走行域のときに限られる。By taking the above means, one engaging portion of the lever key is engaged with the PTO gear only when the other engaging portion is engaged with the low speed gear. The clutch is engaged only in the low speed range.
以下,この考案の実施例を図面を参照して説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第1図はミッションの要部縦断面図,第2図は同じく横
断面図であるが,特定の伝動軸1にこれより下流の走行
系へ動力を伝動する走行ギア2を固嵌しておくととも
に、外部の作業系へ動力を取り出すPTOギア3を遊嵌し
ておく。この走行ギア2とPTOギア3の間にこれより上
流側の二つのギア4,5にそれぞれ常時噛合いするギア6,7
を遊嵌しておく。これにより,このギア6,7のいずれか
と伝動軸1とを動力的に結合すれば,上流の動力は伝動
軸1から走行ギア2を経て走行系へ伝動されることにな
り,このとき,併せてPTOギア3とも結合すれば作業系
へ動力を取り出せることになる。そして,この二つのギ
ア6,7の径を変えてそれぞれ高速ギア6,低速ギア7とし
ておけば、走行系へは高速と低速の回転数を伝動でき
る。FIG. 1 is a longitudinal sectional view of the main part of the mission, and FIG. 2 is a lateral sectional view of the same. A traveling gear 2 for transmitting power to a traveling system downstream from the specific transmission shaft 1 is fixedly fitted. At the same time, the PTO gear 3 for extracting power to the external work system is loosely fitted. Between the traveling gear 2 and the PTO gear 3, two gears 4 and 5 on the upstream side, which are always in mesh with each other, are gears 6, 7 respectively.
Be loosely fitted. As a result, if any of the gears 6 and 7 is power-coupled to the transmission shaft 1, the upstream power is transmitted from the transmission shaft 1 to the traveling system via the traveling gear 2, and at this time, If it is also connected to the PTO gear 3, power can be taken out to the work system. By changing the diameters of the two gears 6 and 7 to form a high speed gear 6 and a low speed gear 7, respectively, high speed and low speed rotation speeds can be transmitted to the traveling system.
ところで、以上の高速ギア6,低速ギア7およびPTOギア
3と伝動軸1との動力の断続を以下のキーシフトチェン
ジ機構で行うのである。By the way, the power transmission between the high speed gear 6, the low speed gear 7 and the PTO gear 3 and the transmission shaft 1 is performed by the following key shift change mechanism.
まず,走行系の高低速ギア6,7と伝動軸1との断続であ
るが,伝動軸1上にスライド自在に設けたシフタ8にピ
ン9を中心として伝動軸1上をスプリング10によって浮
上側に付勢されて浮沈回動するレバーキー11を伝動軸1
の外周軸方向に形成された収容溝12内に嵌入する形態で
設け,その途中に形成された係合部11aを前記高低速ギ
ア6,7の内周に形成された係合溝6a,7aのいずれかに係合
させるのである。作業系のPTOギア3も同様であって,
レバーキー11の先端等にもう一つ別の係合部11bを形成
しておき,これを同じくPTOギア3の内周に形成された
係合溝3aに係脱させるのである。そして,この場合,レ
バーキー11の係合部11bがPTOギア3の係合溝3aに係合で
きるのは,他の係合部11aが低速ギア7の係合溝7aに係
合するときだけになるよう高低速ギア6,7とPTOギア3の
位置関係を決定する。したがって,PTOギア3の両隣りを
空所にしてこれをニュートラル位置13,14とするととも
に,この空所を隔てて高低速ギア6,7を並置することに
なる。なお,走行ギア2には走行系へ動力を伝動する伝
動ギア15が,また,PTOギア3には作業系へ動力を伝動す
る伝動ギア16がそれぞれ噛合っている。First, the high and low speed gears 6 and 7 of the traveling system are intermittently connected to the transmission shaft 1, but the shifter 8 slidably mounted on the transmission shaft 1 floats above the transmission shaft 1 around the pin 9 by the spring 10. Lever key 11 that moves up and down by being biased by the transmission shaft 1
Of the engaging groove 11a formed on the inner periphery of the high and low speed gears 6 and 7, and the engaging portion 11a formed in the receiving groove 12 formed in the outer peripheral axial direction of the Is engaged with either of the above. The PTO gear 3 of the work system is the same,
Another engaging portion 11b is formed at the tip of the lever key 11 and the like, and is engaged with and disengaged from the engaging groove 3a also formed on the inner circumference of the PTO gear 3. In this case, the engaging portion 11b of the lever key 11 can engage with the engaging groove 3a of the PTO gear 3 only when the other engaging portion 11a engages with the engaging groove 7a of the low speed gear 7. The positional relationship between the high and low speed gears 6 and 7 and the PTO gear 3 is determined so that Therefore, both sides of the PTO gear 3 are made empty and the neutral positions 13 and 14 are set, and the high and low speed gears 6 and 7 are juxtaposed to each other with the empty space therebetween. A transmission gear 15 for transmitting power to the traveling system is meshed with the traveling gear 2, and a transmission gear 16 for transmitting power to the working system is meshed with the PTO gear 3.
第3図はシフタ8に連繋する操作レバー17とこれを案内
するガイド18の平面図であるが,操作レバー17をガイド
18中の三位置,すなわち,中立位置19,低速+PTO位置2
0,高速位置21に操作すれば,それぞれ中立,低速でPTO
入り,高速でPTO切りとなる。FIG. 3 is a plan view of the operation lever 17 connected to the shifter 8 and the guide 18 for guiding the same.
Three of 18 positions, namely neutral position 19, low speed + PTO position 2
If you operate to 0 and high speed position 21, PTO at neutral and low speed respectively.
Enter and turn PTO off at high speed.
第4図はこの農作業機の駐車ブレーキ装置を示すもので
あるが,ブレーキシュー22をリンク機構23でウォームホ
イル24に繋ぎ,このウォームホイル24をエンジンキーを
切ったときにスイッチが入る減速モータ25で駆動される
ウォーム26で駆動するようにする。これにより,機を止
めると同時にブレーキが効くから安全であるし,このと
き,ウォーム26のねじれ角を42°以上にしておけば,車
輪側から反力がかかってもウォーム26は回らないセルフ
ロック機構となる。さらに,ウォームホイル24とリンク
機構23との間にワンウェイクラッチを挿入すれば,ブレ
ーキ戻しが即座にでき,タイムラグが少なくなる。FIG. 4 shows the parking brake device of this farm work machine. The brake shoe 22 is connected to the worm wheel 24 by the link mechanism 23, and the worm wheel 24 is switched on when the engine key is turned off. It is driven by the worm 26 driven by. As a result, it is safe because the brake works simultaneously with stopping the machine. At this time, if the twist angle of the worm 26 is set to 42 ° or more, the worm 26 will not rotate even if a reaction force is applied from the wheel side. Become a mechanism. Furthermore, if a one-way clutch is inserted between the worm wheel 24 and the link mechanism 23, the brake can be returned immediately and the time lag can be reduced.
以上,この考案は前記したものであるから、次のような
効果が期待できる。As described above, since the present invention is the one described above, the following effects can be expected.
走行系の変速操作と作業系への動力断続を一つの操作レ
バー17で行い得るので,構造が簡単になるとともに,操
作も容易になる。そして,このとき,作業系への動力接
続は走行速度が低速の場合しか行われないのであるか
ら,安全である。Since the shift operation of the traveling system and the power connection / disconnection to the work system can be performed by the single operation lever 17, the structure is simple and the operation is easy. At this time, the power connection to the work system is safe because it is performed only when the traveling speed is low.
また,これらの操作はレバーキー11に連繋するシフタ8
のスライド動作で行われるのであるから,作動が的確,
かつ,円滑である。In addition, these operations are performed by the shifter 8 linked to the lever key 11.
Since it is performed by the slide operation of, the operation is accurate,
And it is smooth.
第1図はミッション要部の縦断面図,第2図は第1図の
II-II断面図,第3図は操作レバー部の平面図,第4図
は駐車ブレーキ系統を示す側面図である。 (符号) 1……伝動軸 3……PTOギア 6……高速ギア 7……低速ギア 11……レバーキー 11a…… 〃 の係合部 11b…… 〃 〃Fig. 1 is a vertical cross-sectional view of the main part of the mission, and Fig. 2 is that of Fig. 1.
II-II sectional view, FIG. 3 is a plan view of the operation lever portion, and FIG. 4 is a side view showing a parking brake system. (Code) 1 …… Transmission shaft 3 …… PTO gear 6 …… High speed gear 7 …… Low speed gear 11 …… Lever key 11a …… Engagement part of 〃 11b …… 〃 〃
Claims (1)
嵌した伝動軸(1)に常時回転させられる高速ギア
(6)と低速ギア(7)を遊嵌するとともに,前記伝動
軸(1)に係合部(11a)を形成したレバーキー(11)
をスライド可能に固嵌し,該係合部(11a)を前記高速
ギア(6)と低速ギア(7)それぞれに形成された係合
溝(6a),(7a)に選択係合することで前記伝動軸
(1)から前記走行系へ高低二つの回転数で動力を伝達
するキーシフトミッションを有する農作業機において,
前記伝動軸(1)に作業系に動力を付与するPTOギア
(3)を遊嵌するとともに、前記レバーキー(11)に,
前記係合部(11a)が前記低速ギア(7)の係合溝(7
a)に係合したときのみ,前記PTOギア(3)に形成され
た係合溝(3a)に係合する係合部(11b)を形成するこ
とで前記伝動軸(1)から前記作業系に動力を伝達する
ことを特徴とするキーシフトミッションを有する農作業
機のPTO取出構造。1. A high-speed gear (6) and a low-speed gear (7), which are constantly rotated, are loosely fitted to a transmission shaft (1) in which a traveling gear (2) for transmitting power to a traveling system is fixed, and the transmission shaft is provided. Lever key (11) with engaging part (11a) formed in (1)
Is slidably fixed, and the engaging portion (11a) is selectively engaged with engaging grooves (6a) and (7a) formed in the high speed gear (6) and the low speed gear (7), respectively. In a farm work machine having a key shift mission for transmitting power from the transmission shaft (1) to the traveling system at high and low rotational speeds,
A PTO gear (3) that gives power to the work system is loosely fitted to the transmission shaft (1), and the lever key (11) is
The engaging portion (11a) is the engaging groove (7) of the low speed gear (7).
Only when it engages with a), the engaging portion (11b) that engages with the engaging groove (3a) formed in the PTO gear (3) is formed so that the power transmission shaft (1) moves to the working system. A PTO take-out structure for an agricultural work machine that has a key shift mission characterized by transmitting power to a vehicle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17132788U JPH0721944Y2 (en) | 1988-12-28 | 1988-12-28 | PTO take-out structure of agricultural work machine with key shift mission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17132788U JPH0721944Y2 (en) | 1988-12-28 | 1988-12-28 | PTO take-out structure of agricultural work machine with key shift mission |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0291242U JPH0291242U (en) | 1990-07-19 |
JPH0721944Y2 true JPH0721944Y2 (en) | 1995-05-17 |
Family
ID=31463062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17132788U Expired - Lifetime JPH0721944Y2 (en) | 1988-12-28 | 1988-12-28 | PTO take-out structure of agricultural work machine with key shift mission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0721944Y2 (en) |
-
1988
- 1988-12-28 JP JP17132788U patent/JPH0721944Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0291242U (en) | 1990-07-19 |
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