JPH01242829A - Clutch control device for tractor, etc. - Google Patents
Clutch control device for tractor, etc.Info
- Publication number
- JPH01242829A JPH01242829A JP63068778A JP6877888A JPH01242829A JP H01242829 A JPH01242829 A JP H01242829A JP 63068778 A JP63068778 A JP 63068778A JP 6877888 A JP6877888 A JP 6877888A JP H01242829 A JPH01242829 A JP H01242829A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- clutch
- hydraulic
- control valve
- 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
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 description 2
- 241001474791 Proboscis Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
Landscapes
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、トラクタ等のクラッチ制御装置に関する。[Detailed description of the invention] Industrial applications The present invention relates to a clutch control device for a tractor or the like.
従来の技術、および発明が解決しようとする課題
トラクタは、油圧回路によって走行系のクラッチや動力
取出系のクラッチ等を人切りすると共に、更に他のリフ
ト装置等を油圧作動する形態とする場合、上記各走行系
のクラッチ回路、及び動力取出系のクラッチ回路毎に分
流弁を設ける。このように各クラッチ回路毎に分流弁を
各別に設けると、油圧回路全体としては総油圧流量が大
きくなり、油圧ポンプの能力も大さいものを要し、不経
済である。PRIOR ART AND PROBLEMS TO BE SOLVED BY THE INVENTION In a tractor, when a hydraulic circuit is used to disconnect a clutch in a traveling system, a clutch in a power take-off system, etc., and also hydraulically operate other lift devices, etc. A diverter valve is provided for each of the clutch circuits of the traveling system and the clutch circuit of the power extraction system. Providing separate flow divider valves for each clutch circuit in this manner increases the total hydraulic flow rate of the hydraulic circuit as a whole and requires a large capacity hydraulic pump, which is uneconomical.
課題を解決するための手段
この発明は、動力取出系のクラッチ（７）を油圧で入切
する動力取出作動弁（５）及びこのクラッチ作動の油圧
を制御する圧力制御弁（６）と、走行系のクラッチ（１
（１）を油圧で入切する走行作動弁（９）及びこのクラ
ッチ作動の油圧を制御する圧力制御弁（８）とへ、油圧
を切換える切換弁（４）を、油圧ポンプ（１）からの油
圧を分流する分流弁（２）ｔ−経る油圧回路（１１）に
設け、この油圧回路（１１）の該分流弁（２）と切換弁
（４）との間に、該いずれかのクラッチ（７） （１
０）の作動中の油圧を所定以上に保障する圧力保障弁（
３）を設けてなるトラクタ等のクラッチ制御装置の構成
とする。Means for Solving the Problems This invention provides a power take-off operating valve (5) that hydraulically turns on and off a clutch (7) of a power take-off system, a pressure control valve (6) that controls the hydraulic pressure of this clutch operation, and a System clutch (1
A switching valve (4) for switching the hydraulic pressure is connected to a travel operation valve (9) that hydraulically turns on and off the clutch (1), and a pressure control valve (8) that controls the hydraulic pressure for this clutch operation. A diversion valve (2) for dividing hydraulic pressure is provided in the hydraulic circuit (11) passing through the hydraulic circuit (11), and a clutch ( 7) (1
Pressure guarantee valve (
3) A clutch control device for a tractor or the like is configured.
発明の作用、および効果
油圧ポンプ（１）の駆動によって、分流弁（２）を経て
油圧回路（１１）へ分流供給される油圧は、圧力保障弁
（３）、及び切換弁（４）等を経て動力取出作動弁（５
）、及び走行作動弁（９）へ送られる。今、走行系のク
ラッチ（ｌＯ）を入にするときは、走行作動弁（９）を
中立位置からクラッチ入位置へ作動させると、分流弁（
２）を経た油圧回路（１１）の油圧は、圧力保障弁（３
）、切換弁（４）、圧力制御弁（８）、及び走行作動弁
（９）を経て、走行系クラッチ（ｌＯ）を入位置へ作動
する。このとき、この油圧回路（１１）から走行系クラ
ッチ（１０）に働く油圧は、圧力保障弁（３）によって
保障される圧力のもとに圧力制御弁（８）による油圧制
御が行われる。Functions and Effects of the Invention When the hydraulic pump (1) is driven, hydraulic pressure is supplied in a divided manner to the hydraulic circuit (11) via the diversion valve (2), and the hydraulic pressure is supplied to the hydraulic circuit (11) through the pressure guarantee valve (3), the switching valve (4), etc. Power take-off valve (5
), and the travel operation valve (9). Now, when turning on the clutch (lO) of the travel system, operate the travel operation valve (9) from the neutral position to the clutch on position, and then the flow divider valve (
2), the hydraulic pressure of the hydraulic circuit (11) is transferred to the pressure guarantee valve (3).
), the switching valve (4), the pressure control valve (8), and the travel operation valve (9), and then the travel system clutch (lO) is operated to the on position. At this time, the hydraulic pressure applied to the drive clutch (10) from the hydraulic circuit (11) is controlled by the pressure control valve (8) under the pressure guaranteed by the pressure guarantee valve (3).
又、動力取出クラッチ（７）を大位置にして作業装置を
伝動するときは、動力取出作動弁（５）を入位置へ作動
させると、これと同時に切換弁（４）がすＪ換作動され
て、分流弁（２）を経た油圧回路（１１）の油圧は、圧
力保障弁（３）、切換弁（４）、動力取出作動弁（５）
、及び圧力制御弁（６）を経て、動力取出クラッチ（７
）を入位置へ作動する。このとき油圧回路（１１）を経
て動力取出クラッチ（７）に働く油圧は、圧力保障弁（
３）によって保障される圧力のもとに圧力制御弁（８）
で油圧制御される。In addition, when the power take-off clutch (7) is set to the large position to transmit the working device, the power take-off operation valve (5) is operated to the on position, and at the same time, the switching valve (4) is operated to switch between J and J. The hydraulic pressure in the hydraulic circuit (11) that has passed through the diversion valve (2) is transferred to the pressure guarantee valve (3), the switching valve (4), and the power take-off operating valve (5).
, and the power take-off clutch (7) via the pressure control valve (6).
) to the on position. At this time, the hydraulic pressure acting on the power take-off clutch (7) via the hydraulic circuit (11) is transferred to the pressure guarantee valve (
3) Under the pressure guaranteed by the pressure control valve (8)
Hydraulically controlled.
このように、油圧回路（１１）は１分流弁（２）から圧
力保障弁（３）、及び切換弁（４）を共用して、走行系
のクラッチ（１０）を圧力制御弁（８）による制御圧力
のもとに作動させる走行作動弁（９）、及び動力取出系
のクラッチ（７）を圧力制御弁（６）による制御圧力の
もとに作動させる動力取出作動弁（５）を各々油圧作動
するように連結するものであり、しかも、これら走行作
動弁（９）及び圧力制御弁（８）、又は、動力取出作動
弁（５）、及び圧力制御弁（６）と、切換弁（４）との
関連制御によって、圧力制御内容の異る各クラッチ（１
０） （７）に適応した油圧を制御することができ、
一つの油圧回路（ｉｌ）で該各クラッチ（１０） （
７）を独立して作動でき、的確な制御と簡単な油圧回路
構成とすることができる。In this way, the hydraulic circuit (11) shares the 1st flow divider valve (2), the pressure guarantee valve (3), and the switching valve (4), and connects the traveling system clutch (10) to the pressure control valve (8). The travel operating valve (9) operates under control pressure, and the power take-off operating valve (5) operates the clutch (7) of the power take-off system under control pressure from the pressure control valve (6). The travel operating valve (9) and the pressure control valve (8), or the power take-off operating valve (5) and the pressure control valve (6), and the switching valve (4) ), each clutch (1
0) It is possible to control the hydraulic pressure adapted to (7),
Each clutch (10) (
7) can be operated independently, allowing accurate control and a simple hydraulic circuit configuration.
実施例
なお、面倒において、動力取出系のクラッチ（７）及び
走行系のクラッチ（ｌＯ）は、共に軸（１２） （１
３）と、この軸（１２＞ （１３）回りに回転自在の
ギヤ（４）、乃至変速ギヤ（１５） （１８）との間
を、油圧による圧接、又は油圧による咬合等によって連
接して伝動入りの状態、即ち入位置にするもので、単な
るクラッチとするもよく、変速を兼ねるクラッチとする
もよい、走行系のクラッチ（１０）は、トラクタのミッ
ションケース内の走行変速を行う変速装置内に設けられ
、又、動力取出系のクラッチ（７）は、動力取出軸を伝
動する変速装置内に設けられる。Embodiment It should be noted that the power take-off system clutch (7) and the traveling system clutch (lO) are both connected to the shaft (12) (1
3) and the gear (4) or variable speed gear (15) (18) that can freely rotate around this shaft (12> (13)), and transmit power by connecting them by hydraulic pressure contact or hydraulic engagement. The traveling system clutch (10) is a clutch that is placed in the engaged state, that is, in the engaged position, and may be a simple clutch or a clutch that also serves as a gearshift clutch. The clutch (7) of the power take-off system is installed in a transmission that transmits power to the power take-off shaft.
エンジンによって駆動される油圧ポンプ（１）から分流
弁（２）を経て油圧回路（＋１）へ分流すると共に、こ
の分流された余りの油圧回路（１７）は、他の油圧シリ
ンダ等へ連結している。The flow is diverted from the hydraulic pump (1) driven by the engine to the hydraulic circuit (+1) via the diverter valve (2), and the remainder of the diverted hydraulic circuit (17) is connected to other hydraulic cylinders, etc. There is.
油圧回路（１１）は、圧力保障弁（３）を経て切換弁（
４）へ連通する回路部（ＩＢ）と１分流弁（２）から直
接切換弁（４）へ連通する回路部（１９る。The hydraulic circuit (11) passes through the pressure guarantee valve (3) and then connects to the switching valve (
4), and a circuit section (19) that directly communicates from the branch valve (2) to the switching valve (4).
該圧力制御弁（６）（今）はマイクロコンピュータを有
する制御装置からの出力信号によって電磁的に圧力制御
されるもので、これらの制御圧力は、圧力制御弁（６）
では動力取出系のクラッチ（７）（第２図）に応じ、又
圧力制御弁（８）では走行系の各クラッチ（１０）
（第３図）に応じて、各々プログラム等に予め適九に設
定しておく。The pressure control valve (6) (currently) is electromagnetically controlled in pressure by an output signal from a control device having a microcomputer, and these control pressures are controlled by the pressure control valve (6).
The pressure control valve (8) corresponds to the power take-off system clutch (7) (Fig. 2), and the pressure control valve (8) corresponds to the drive system clutch (10).
(Fig. 3), the appropriate settings are made in each program etc. in advance.
これら圧力制御弁（６）（８）の中立位置走行系のクラ
ッチ（ｌＯ）の潤滑油として送る回路（２０）が設けら
れ、チエツク弁（２１） （２２）を有する。A circuit (20) is provided for supplying lubricating oil to the clutch (lO) of the neutral position traveling system of these pressure control valves (6) and (8), and has check valves (21) and (22).
切換弁（４）は、油圧回路（１１）の回路部（１８）を
走行作動弁（９）及び圧力制御弁（８）へ連保障位置（
２４）とに、電磁的に切換えるもので。The switching valve (4) connects the circuit section (18) of the hydraulic circuit (11) to the traveling operation valve (9) and the pressure control valve (8) to a continuous position (
24), which can be switched electromagnetically.
去吻保障位置（２０へ切換作動する。なお、圧力制動弁
（６）（８）の最高調節圧力は、圧力保障弁（３）のリ
リーフ圧力よりも若干大きく設定するとよい。The switching operation is performed to the proboscis guarantee position (20).The maximum adjustment pressure of the pressure brake valves (6) and (8) is preferably set to be slightly larger than the relief pressure of the pressure guarantee valve (3).
図はこの発明の一実施例を示すもので、第１図は油圧回
路図、第２図、第３図は一部の油圧変化を示す油圧グラ
フである。
図中、符号（１）は油圧ポンプ、（２）は分流弁、（３
）は圧力保障弁、（４）は切換弁、（５）は動力取出作
動弁、（６）は圧力制御弁、（７）は動力取出系のクラ
ッチ、（８）は圧力制御弁、（９）は走行作動弁、
（１（１）は走行系のクラッチ、（１１）は油圧回路を
示す。The drawings show an embodiment of the present invention; FIG. 1 is a hydraulic circuit diagram, and FIGS. 2 and 3 are hydraulic pressure graphs showing some changes in hydraulic pressure. In the figure, (1) is a hydraulic pump, (2) is a flow divider valve, and (3) is a hydraulic pump.
) is the pressure guarantee valve, (4) is the switching valve, (5) is the power take-off operation valve, (6) is the pressure control valve, (7) is the power take-off system clutch, (8) is the pressure control valve, (9 ) is a traveling valve,
(1 (1) indicates the clutch of the traveling system, and (11) indicates the hydraulic circuit.
Claims (1)
作動弁（５）及びこのクラッチ作動の油圧を制御する圧
力制御弁（６）と、走行系のクラッチ（１０）を油圧で
入切する走行作動弁（９）及びこのクラッチ作動の油圧
を制御する圧力制御弁（８）とへ、油圧を切換える切換
弁（４）を、油圧ポンプ（１）からの油圧を分流する分
流弁（２）を経る油圧回路（１１）に設け、この油圧回
路（１１）の該分流弁（２）と切換弁（４）との間に、
該いずれかのクラッチ（７）（１０）の作動中の油圧を
所定以上に保障する圧力保障弁（３）を設けてなるトラ
クタ等のクラッチ制御装置。A power take-off operating valve (5) that hydraulically turns on and off the power take-off system clutch (7), a pressure control valve (6) that controls the hydraulic pressure of this clutch operation, and a drive system clutch (10) that hydraulically turns on and off. A switching valve (4) that switches the hydraulic pressure to a travel operation valve (9) that controls the hydraulic pressure of this clutch operation and a pressure control valve (8) that controls the hydraulic pressure of this clutch operation. ) is provided in the hydraulic circuit (11) passing through the hydraulic circuit (11), between the diversion valve (2) and the switching valve (4),
A clutch control device for a tractor or the like, which is provided with a pressure guarantee valve (3) that guarantees the hydraulic pressure during operation of any of the clutches (7) and (10) to be above a predetermined level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63068778A JPH01242829A (en) | 1988-03-22 | 1988-03-22 | Clutch control device for tractor, etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63068778A JPH01242829A (en) | 1988-03-22 | 1988-03-22 | Clutch control device for tractor, etc. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01242829A true JPH01242829A (en) | 1989-09-27 |
Family
ID=13383532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63068778A Pending JPH01242829A (en) | 1988-03-22 | 1988-03-22 | Clutch control device for tractor, etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01242829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02286922A (en) * | 1989-04-28 | 1990-11-27 | Yanmar Diesel Engine Co Ltd | Oil pressure controller for hydraulic clutch |
-
1988
- 1988-03-22 JP JP63068778A patent/JPH01242829A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02286922A (en) * | 1989-04-28 | 1990-11-27 | Yanmar Diesel Engine Co Ltd | Oil pressure controller for hydraulic clutch |
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