JPH0656085A - Load limiting device for forward two-speed reduction reversing gear - Google Patents
Load limiting device for forward two-speed reduction reversing gearInfo
- Publication number
- JPH0656085A JPH0656085A JP23637892A JP23637892A JPH0656085A JP H0656085 A JPH0656085 A JP H0656085A JP 23637892 A JP23637892 A JP 23637892A JP 23637892 A JP23637892 A JP 23637892A JP H0656085 A JPH0656085 A JP H0656085A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- governor
- valve
- pressure
- switching 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
- 239000010720 hydraulic oil Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Gear-Shifting Mechanisms (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、前進二速式減速逆転
機の負荷制限装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load limiting device for a forward two-speed type reduction / reversing machine.
【０００２】[0002]
【従来の技術】前進二速式の減速逆転機においては、減
速逆転機自体が大型化するため、全体の小さい高速漁船
等には搭載が困難であり、このため、伝達トルクの大き
い前進二速使用時の使用回転域を制限することにより、
その前進二速側のクラッチ容量を小さくし、これによっ
て全体を小型化することが考えられている。即ち、エン
ジン回転数が特定回転数以上になると、前進二速から前
進一速側に自動的に切換わるようにして、回転数の大き
い領域では前進二速を使用できないようにするものであ
る。2. Description of the Related Art In a forward two-speed type reduction / reversing machine, the reduction / reversing machine itself becomes large and it is difficult to mount it on a small high-speed fishing boat. By limiting the rotation range used during use,
It is considered that the clutch capacity on the forward second speed side is reduced, and thereby the entire size is reduced. That is, when the engine speed becomes equal to or higher than the specific speed, the second forward speed is automatically switched to the first forward speed side so that the second forward speed cannot be used in a region where the rotational speed is large.
【０００３】このような装置として、従来、エンジン回
転数を検出して、このエンジン回転数に応じて、前進一
速と前進二速クラッチへの供給作動油を電子的に切換え
るようにしたものがある。As such a device, conventionally, there is one that detects the engine speed and electronically switches the hydraulic oil supplied to the first forward speed and the second forward clutch in accordance with the engine speed. is there.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の装置におい
て、電子制御によって前進一速と前進二速の切換えを行
うものにおいては、装置全体が高価となる欠点があり、
また、極めて精密機器である電子機器自体の信頼性の問
題もある。更に、従来においては、エンジン側の回転数
を検出して前進一速と二速の切換えを行なっているた
め、クラッチに作用する負荷に応じて、即ち前進二速に
かかる負荷を確実に制限できないという欠点があった。In the above-mentioned conventional apparatus, the one in which the first forward speed and the second forward speed are switched by electronic control has a drawback that the entire apparatus becomes expensive,
There is also a problem of reliability of the electronic device itself which is an extremely precise device. Further, in the prior art, since the engine speed is detected to switch between the first forward speed and the second speed, the load applied to the clutch, that is, the second forward speed cannot be reliably limited. There was a drawback.
【０００５】この発明は、このような従来の欠点を解消
して、構造が簡単で低コストであり、しかも、クラッチ
に対する負荷に応じて前進一速と二速との切換えを行う
ことができ、その結果、前進二速での過大負荷の防止を
確実に行うことができるようにした負荷制限装置を提供
するものである。The present invention solves the above drawbacks of the prior art, has a simple structure and is low in cost, and can switch between forward first speed and second speed according to the load on the clutch. As a result, the present invention provides a load limiting device capable of reliably preventing an excessive load in the second forward speed.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
め、この発明では、プロペラの回転数に応じて吐出圧力
を変更するガバナバルブを設けるとともに、そのガバナ
圧回路を前進一速・二速切換弁側にその切換弁の切換動
作圧力として導入連結して、プロペラ回転数が特定回転
数以上になると前記切換弁を前進一速側に切換えるよう
にしたことを特徴とする。In order to solve the above problems, according to the present invention, a governor valve for changing the discharge pressure according to the number of revolutions of a propeller is provided, and the governor pressure circuit is switched between forward first speed and second speed. It is characterized in that the switching valve is introduced and connected to the valve side as a switching operation pressure of the switching valve, and the switching valve is switched to the forward first speed side when the propeller rotation speed becomes equal to or higher than a specific rotation speed.
【０００７】同じくこの出願の請求項２の発明は、プロ
ペラの回転数に応じてガバナ圧力を変更するガバナバル
ブを設けるとともに、そのガバナ圧回路を前進一速・二
速切換弁の切換え動作回路の開閉弁側に、その開閉弁の
パイロット圧力として導入連結して、プロペラ回転数が
特定回転数以上になると前記切換弁を前進一速側に切換
るようにしたことを特徴とする。According to the invention of claim 2 of this application, a governor valve for changing the governor pressure according to the number of revolutions of the propeller is provided, and the governor pressure circuit is opened / closed for the switching operation circuit of the forward first speed / second speed switching valve. It is characterized in that the switching valve is switched to the forward first speed side when the propeller rotation speed becomes equal to or higher than a specific rotation speed by introducing and connecting to the valve side as pilot pressure of the on-off valve.
【０００８】[0008]
【作用】プロペラ回転数が特定回転数以上になると、ガ
バナバルブからのガバナ圧によって、前進一速・二速切
換弁が、前進一速側に切換わる。When the propeller rotation speed exceeds the specific rotation speed, the forward first speed / second speed switching valve is switched to the forward first speed side by the governor pressure from the governor valve.
【０００９】[0009]
【実施例】図１において、（１）は作動油ポンプであ
り、この作動油ポンプ（１）の吐出側の通路（２）の途
中に、前・後進切換弁（３）が配置されている。この前
・後進切換弁（３）の後進切換時において作動油ポンプ
（１）からの圧油が供給される後進側油路（４）が、減
速逆転機の後進クラッチ（11）に接続されている。他
方、同じく前・後進切換弁（３）の前進切換時におい
て、作動油ポンプ（１）からの圧油が供給される前進側
油路（５）の途中に、前進一速・二速切換弁（６）が配
置され、この前進一速・二速切換弁（６）の切換動作に
応じて、前進一速においては、前進一速作動油通路
（７）より前進一速クラッチ（８）へ圧油が供給され、
前進二速作動油通路（９）より前進二速クラッチ（10）
へ圧油が供給されるようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, (1) is a hydraulic oil pump, and a forward / reverse switching valve (3) is arranged in the middle of a passage (2) on the discharge side of the hydraulic oil pump (1). . When the forward / reverse switching valve (3) is switched to the reverse direction, the reverse side oil passage (4) to which the pressure oil is supplied from the hydraulic oil pump (1) is connected to the reverse clutch (11) of the reduction / reverse gear. There is. On the other hand, also when the forward / reverse switching valve (3) is switched forward, the forward first speed / second speed switching valve is provided in the middle of the forward oil passage (5) to which the pressure oil from the hydraulic oil pump (1) is supplied. (6) is arranged, and in response to the switching operation of the forward first speed / second speed switching valve (6), in the first forward speed, from the first forward speed hydraulic oil passage (7) to the forward first speed clutch (8). Pressure oil is supplied,
Second forward speed clutch (10) from second forward hydraulic oil passage (9)
The pressure oil is supplied to.
【００１０】（12）は、プロペラ軸（13）へ接続される
減速逆転機の出力軸であり、この出力軸（12）上に設け
た減速大歯車（14）が、前記各クラッチ（８）（10）
（11）の被動側である小歯車（15）（15）…へ咬合連結
されて、これらのクラッチ（８）（10）（11）の切換に
応じて、小歯車（15）から大歯車（14）を介して、出力
軸（12）へ動力を伝達するようにしている。（17）は、
この発明のガバナバルブであって、そのガバナウェイト
機構の入力歯車（18）が、前記減速大歯車（14）に咬合
連結され、これにより、プロペラ軸（13）の回転に応じ
た回転動力が、前記入力歯車（18）を介して入力され
て、その回転数に応じてガバナバルブ（17）を動作させ
るようにしている。Reference numeral (12) is an output shaft of a reduction gear reversing machine connected to a propeller shaft (13), and a reduction gear (14) provided on the output shaft (12) is provided with each clutch (8). (Ten)
The small gears (15), (15), which are the driven side of the (11), are articulated and connected, and the small gears (15) to the large gears ( Power is transmitted to the output shaft (12) via 14). (17) is
In the governor valve of the present invention, the input gear (18) of the governor weight mechanism is meshed with the reduction gear (14), whereby rotational power corresponding to the rotation of the propeller shaft (13) is Input is made via the input gear (18), and the governor valve (17) is operated according to the number of rotations.
【００１１】前記前・後進切換弁（３）よりも上流側で
ある作動油ポンプ（１）の吐出側通路（２）の途中より
分岐して、ガバナ入口通路（20）が接続されており、こ
のガバナ入口通路（20）が、前記ガバナバルブ（17）の
入口側に接続されるとともに、更に、そのガバナバルブ
（17）の出口側に接続されたガバナ圧通路（21）の出口
側が、前進一速・二速切換弁（６）のスプール戻しバネ
（22）とは反対側に、そのガバナ圧を供給するように接
続されている。The governor inlet passage (20) is connected to the hydraulic fluid pump (1), which is upstream of the forward / reverse switching valve (3), by branching from the discharge passage (2). The governor inlet passage (20) is connected to the inlet side of the governor valve (17), and further, the outlet side of the governor pressure passage (21) connected to the outlet side of the governor valve (17) has a forward first speed. The second speed switching valve (6) is connected to the side opposite to the spool return spring (22) so as to supply the governor pressure.
【００１２】上記において、ガバナバルブ（17）からの
ガバナ圧通路（21）には、プロペラ軸（13）の回転数に
応じた圧力のガバナ圧が吐出され、このガバナ圧と前記
戻しバネ（22）とのバランスを適切に設定することによ
り、プロペラ軸（13）の回転数が特定回転数以上になる
とガバナ圧（21）が戻しバネ（22）のバネ力に打ち勝
ち、前進一速・二速切換弁（６）を、前進一速側に自動
的に切換えることができる。In the above, the governor pressure of the pressure corresponding to the rotation speed of the propeller shaft (13) is discharged into the governor pressure passage (21) from the governor valve (17), and the governor pressure and the return spring (22). By properly setting the balance with the, the governor pressure (21) overcomes the spring force of the return spring (22) when the number of revolutions of the propeller shaft (13) exceeds a certain number of revolutions, and it switches between forward first speed and second speed. The valve (6) can be automatically switched to the first forward speed side.
【００１３】図２は、この発明の別の実施例で、前記ガ
バナ圧通路（21）の圧力を、前進一速・二速切換弁
（６）の切換動作圧力として直接使用することに代え
て、その前進一速・二速切換弁（６）へ別の切換動作回
路（23）を接続して、この回路（23）を開閉する開閉弁
（24）のパイロット圧として利用したものである。即
ち、前記切換動作回路（23）は、作動油ポンプ（１）の
吐出側通路（２）より分岐して、その作動油圧力によっ
て、前進一速・二速切換弁（６）を直接切換えるよう接
続されるが、その途中にその回路（23）を開閉する開閉
弁（24）を設け、ガバナ圧通路（21）の圧力が特定圧力
以上になったときに、この開閉弁（24）の戻しバネ（2
5）のバネ力に抗して開閉弁（24）を切換えて、前進一
速・二速切換弁（６）側に切換動作圧力を供給するよう
にしたものである。FIG. 2 shows another embodiment of the present invention, in which the pressure in the governor pressure passage (21) is directly used as the switching operation pressure of the forward first speed / second speed switching valve (6). Another forward switching first speed / second speed switching valve (6) is connected to another switching operation circuit (23) and is used as a pilot pressure of an on-off valve (24) for opening and closing this circuit (23). That is, the switching operation circuit (23) branches from the discharge side passage (2) of the hydraulic oil pump (1) and directly switches the forward first speed / second speed switching valve (6) by the hydraulic oil pressure. An on-off valve (24) that opens and closes the circuit (23) is provided in the middle of the connection, but when the pressure in the governor pressure passage (21) exceeds a specified pressure, this on-off valve (24) returns. Spring (2
The on-off valve (24) is switched against the spring force of 5) to supply the switching operation pressure to the forward first speed / second speed switching valve (6) side.
【００１４】図３は、前記プロペラ軸（13）の回転数と
ガバナ圧力との関係を示すグラフであり、このように、
ガバナ圧力は、プロペラ軸（13）の回転数に応じて変化
し、例えば、プロペラ軸回転数が図のＮ1 回転の時のガ
バナ圧力Ｐ1 において前進一速側に切換えるようにする
には、そのガバナ圧力Ｐ1 が打ち勝つような前記戻しバ
ネ（22）（25）のバネ力を設定すれば良い。FIG. 3 is a graph showing the relationship between the rotation speed of the propeller shaft (13) and the governor pressure.
The governor pressure changes according to the number of revolutions of the propeller shaft (13). For example, in order to switch to the first forward speed at the governor pressure P 1 when the number of revolutions of the propeller shaft is N 1 in the figure, The spring force of the return springs (22) (25) may be set so that the governor pressure P 1 is overcome.
【００１５】図４は、プロペラ軸回転数と前進一速・二
速との関係を示したもので、プロペラ軸回転数がＮ1 以
上の時は、常に前進一速が使用されるようになってい
る。FIG. 4 shows the relationship between the propeller shaft rotation speed and the forward first speed / second speed. When the propeller shaft rotation speed is N 1 or more, the forward first speed is always used. ing.
【００１６】[0016]
【発明の効果】以上のように、この発明によれば、プロ
ペラ軸回転数に応じたガバナ圧力を変更するガバナバル
ブのガバナ圧回路を、前進一速・二速切換弁の切換動作
圧力として利用することにより、従来のような電子的に
切換えるものと異なって、簡単な構成で前進二速側の負
荷を制限することができ、安価でしかも信頼性の高い装
置を得ることができる。また、この発明では、プロペラ
軸回転数に応じてガバナ圧を発生させるようにして、そ
のプロペラ軸回転数に応じて前進一速と二速との切換を
行うようにしているから、エンジン回転数に応じて切換
える従来の装置と異なって、クラッチに作用する負荷を
確実に制限できるという効果がある。As described above, according to the present invention, the governor pressure circuit of the governor valve for changing the governor pressure according to the propeller shaft speed is used as the switching operating pressure of the forward first speed / second speed switching valve. This makes it possible to limit the load on the second forward speed side with a simple structure, unlike the conventional electronically switching type, and to obtain an inexpensive and highly reliable device. Further, in the present invention, the governor pressure is generated according to the propeller shaft rotation speed, and the forward first speed and the second speed are switched according to the propeller shaft rotation speed. Unlike the conventional device that switches according to the above, there is an effect that the load acting on the clutch can be surely limited.
【図１】この発明の実施例を示す舶用減速逆転機の油圧
回路図である。FIG. 1 is a hydraulic circuit diagram of a marine speed reducer / reverse gear according to an embodiment of the present invention.
【図２】ガバナバルブのガバナ圧を切換弁の動作油圧回
路のパイロット圧として使用した場合の要部の回路図で
ある。FIG. 2 is a circuit diagram of a main part when a governor pressure of a governor valve is used as a pilot pressure of an operating hydraulic circuit of a switching valve.
【図３】プロペラ回転数に対するガバナ圧の変化を示す
グラフである。FIG. 3 is a graph showing changes in governor pressure with respect to propeller rotation speed.
【図４】プロペラ軸回転数と変速段との関係を示すグラ
フである。FIG. 4 is a graph showing a relationship between a propeller shaft rotation speed and a shift speed.
（６） 前進一速・二速切換弁 （13） プロペラ軸 （17） ガバナバルブ （21） ガバナ圧通路 (6) Forward first speed / second speed switching valve (13) Propeller shaft (17) Governor valve (21) Governor pressure passage
Claims (2)
変更するガバナバルブを設けるとともに、そのガバナ圧
回路を前進一速・二速切換弁側にその切換弁の切換動作
圧力として導入連結して、プロペラ回転数が特定回転数
以上になると前記切換弁を前進一速側に切換えるように
したことを特徴とする前進二速式減速逆転機の負荷制限
装置。1. A governor valve for changing the governor pressure according to the number of revolutions of a propeller is provided, and the governor pressure circuit is introduced and connected to the forward first speed / second speed switching valve side as the switching operating pressure of the switching valve. A load limiting device for a forward two-speed reduction / reversing machine, wherein the switching valve is switched to the first forward speed when the propeller rotational speed exceeds a specific rotational speed.
変更するガバナバルブを設けるとともに、そのガバナ圧
回路を前進一速・二速切換弁の切換え動作回路の開閉弁
側に、その開閉弁のパイロット圧力として導入連結し
て、プロペラ回転数が特定回転数以上になると前記切換
弁を前進一速側に切換えるようにしたことを特徴とする
前進二速式減速逆転機の負荷制限装置。2. A governor valve for changing the governor pressure according to the number of revolutions of the propeller is provided, and the governor pressure circuit is provided on the opening / closing valve side of the switching operation circuit of the forward first speed / second speed switching valve, and the pilot valve of the opening / closing valve. A load limiting device for a forward two-speed reduction / reversing machine, wherein the switching valve is switched to the forward first speed side when the propeller speed becomes equal to or higher than a specific speed by introducing and connecting as pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23637892A JPH0656085A (en) | 1992-08-11 | 1992-08-11 | Load limiting device for forward two-speed reduction reversing gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23637892A JPH0656085A (en) | 1992-08-11 | 1992-08-11 | Load limiting device for forward two-speed reduction reversing gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0656085A true JPH0656085A (en) | 1994-03-01 |
Family
ID=16999904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23637892A Pending JPH0656085A (en) | 1992-08-11 | 1992-08-11 | Load limiting device for forward two-speed reduction reversing gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0656085A (en) |
-
1992
- 1992-08-11 JP JP23637892A patent/JPH0656085A/en active Pending
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