JPH02283595A - Steering gear for small boat - Google Patents
Steering gear for small boatInfo
- Publication number
- JPH02283595A JPH02283595A JP1105521A JP10552189A JPH02283595A JP H02283595 A JPH02283595 A JP H02283595A JP 1105521 A JP1105521 A JP 1105521A JP 10552189 A JP10552189 A JP 10552189A JP H02283595 A JPH02283595 A JP H02283595A
- Authority
- JP
- Japan
- Prior art keywords
- gear case
- rudder
- flank
- water flow
- propeller
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 230000000452 restraining effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、船外機を装着したボート、或はスターンドラ
イブのような後方にプロペラを有するギヤケースを左右
に振ることによって旋回力を得るようにした小型艇の操
舵装置に関する。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a boat equipped with an outboard motor, or a gear case having a propeller at the rear such as a stern drive, by swinging it from side to side. The present invention relates to a steering device for a small boat that obtains turning power.
（従来の技術）
第４図は船体の船尾部に従来の船外機を装着した状態を
示す図であって、船外機１はクランプブラケット２によ
って船体３のトランサム３ａに装着されている。上記船
外機１は、エンジンを収容するエンジン部４と、そのエ
ンジンの回転力をプロペラ５に伝えるドライブシャフト
を収容するドライブシャフト部６と、そのドライブシャ
フト部６の下方に設けられ、プロペラを回転自在に支持
するギヤケース７とから構成されている。(Prior Art) FIG. 4 is a diagram showing a state in which a conventional outboard motor is attached to the stern of a boat body. The outboard motor 1 is attached to the transom 3a of the boat body 3 by a clamp bracket 2. The outboard motor 1 includes an engine section 4 that accommodates an engine, a drive shaft section 6 that accommodates a drive shaft that transmits the rotational force of the engine to a propeller 5, and a drive shaft section 6 that is provided below the drive shaft section 6 to drive the propeller. The gear case 7 is rotatably supported.
上記ドライブシャフト部６の前縁部にはスイベルケース
８が縦軸線回りに回動可能に装着されており、このスイ
ベルケース８の上部が前記クランプブラケット２に水平
軸９の回りに揺動可能に装着され、船外機１自体を上記
水平軸９を中心に揺動して所定角度位置に固定可能とし
である。A swivel case 8 is attached to the front edge of the drive shaft section 6 so as to be rotatable around a vertical axis, and the upper part of the swivel case 8 is attached to the clamp bracket 2 so as to be able to swing around a horizontal axis 9. The outboard motor 1 itself can be swung around the horizontal shaft 9 and fixed at a predetermined angular position.
ところで、上記ギヤケース７はそれ自身が舵の役目をも
果たすことができるような形状にしてあり、スイベルケ
ース８内に配設された縦軸８ａを中心として上記ギヤケ
ース７を左右に振ってブロベラスラスト軸の方向を変え
ることによって、旋回力を得るようにしである（第５図
）。なお、第４図において符号１０はエンジン冷却用の
吸水口である。By the way, the gear case 7 itself is shaped so that it can also function as a rudder, and by swinging the gear case 7 left and right around a vertical shaft 8a disposed in the swivel case 8, it can be used as a rudder. The turning force is obtained by changing the direction of the thrust axis (Figure 5). In FIG. 4, reference numeral 10 is a water intake port for cooling the engine.
（発明が解決しようとする課題）
ところが、旋回時のギヤケース７回りの水流の状態を考
えてみると、第６図に示すように、旋回半径外側の水流
の圧力が下がり、特に高速時には、ギヤケースの側面に
剥離現象が生じて、キャビテーションが発生し、舵の機
能が低下する等の問題がある。また、このような水流の
ため後方で回転するプロペラ５のスラストを減少させて
しまう。(Problem to be Solved by the Invention) However, when considering the state of the water flow around the gear case 7 during turning, as shown in Fig. 6, the pressure of the water flow outside the turning radius decreases, and especially at high speeds, the gear case 7 There are problems such as peeling phenomenon occurring on the sides of the steering wheel, cavitation, and deterioration of rudder function. Moreover, such a water flow reduces the thrust of the propeller 5 rotating at the rear.
さらに、ギヤケース７の側面に設けられている吸水口１
０から取り入れられる水量が、ギヤケース側面における
水流の剥離現象等によって減少し、エンジンのオーバー
ヒートを招く恐れがある等の問題がある。Furthermore, the water intake port 1 provided on the side of the gear case 7
There is a problem that the amount of water taken in from zero is reduced due to separation of water flow on the side of the gear case, etc., which may lead to overheating of the engine.
本発明はこのような点に鑑み、舵として作用するギヤケ
ースの側面での水流の剥離がなく、プロペラのスラスト
減少を生じるようなことがない操舵装置を得ることを目
的とする。In view of these points, it is an object of the present invention to provide a steering device that does not cause separation of water flow on the side surface of a gear case that acts as a rudder, and does not cause a reduction in propeller thrust.
（課題を解決するための手段）
本発明は、後方にプロペラを有するギヤケースを左右に
振ることによって旋回力を得るようにした小型艇の操舵
装置において、上記ギヤケースの前方にそのギヤケース
の側面とともに全体が滑らかな翼型状の流線形をなすよ
うな固定前を設けたことを特徴とする。(Means for Solving the Problems) The present invention provides a steering system for a small boat in which a turning force is obtained by swinging a gear case having a propeller at the rear to the left and right. It is characterized by having a fixed front part that forms a smooth airfoil-like streamlined shape.
（作 用）
舵を切るためにギヤケースを舷側に振っても、固定前と
ギヤケースが連続する流線形を形成し、旋回半径外側の
ギヤケース後方部分に流れ込む水の迎角の変化が小さく
、水流の剥離現象が発生しにくくなる。したがって、大
きな旋回力を得ることができる。(Function) Even when the gear case is swung to the side to turn the rudder, the gear case forms a continuous streamlined shape before it is fixed, and the angle of attack of the water flowing into the rear part of the gear case outside the turning radius changes little, reducing the flow of water. Peeling phenomenon is less likely to occur. Therefore, a large turning force can be obtained.
（実施例）
以下、第１図乃至第３図を参照して本発明の一実施例に
ついて説明する。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
第１図において、エンジン部４、ドライブシャフト部６
およびギヤケース７とからなる船外機１は、スイベルケ
ース８に縦軸線回りに揺動可能に装着され、このスイベ
ルケース８の上部がクランプブラケット２に装着され、
このクランプブラケット２が船体３のトランサム３ａに
取り付けられている。In FIG. 1, an engine section 4, a drive shaft section 6
and a gear case 7, the outboard motor 1 is mounted on a swivel case 8 so as to be swingable around a vertical axis, and the upper part of the swivel case 8 is mounted on the clamp bracket 2.
This clamp bracket 2 is attached to a transom 3a of a hull 3.
上記構成は従来の船外機と全く同様であるが、本発明に
おいては、ギヤケース７の前方においてギヤケースの軸
線方向に延びる固定前１１が上記スイベルケース８の下
部に一体的に形成されている。The above structure is exactly the same as that of a conventional outboard motor, but in the present invention, a front fixing part 11 extending in the axial direction of the gear case 7 is integrally formed in the lower part of the swivel case 8 in front of the gear case 7.
ところで、上記ギヤケース７の前縁は、第２図に示すよ
うに、その断面が半径Ｒ２の凸曲面に形成され、固定前
１１の後縁はその断面が半径Ｒ１の凹曲面に形成され、
固定前１１の後縁とギヤケース７の前縁との間にはわず
かな隙間が形成されている。また、固定前１１およびギ
ヤケース７の外面は、ギヤケース７を両舷に振った場合
にも全体が滑らかな翼型状の流線形をなすような形状と
しである。By the way, as shown in FIG. 2, the front edge of the gear case 7 has a convex cross section with a radius R2, and the rear edge of the front fixation 11 has a concave cross section with a radius R1.
A slight gap is formed between the rear edge of the front fixation 11 and the front edge of the gear case 7. Further, the outer surfaces of the front fixing part 11 and the gear case 7 are shaped so that the whole forms a smooth airfoil-like streamline even when the gear case 7 is swung to both sides.
しかして、船体の航行中に旋回を行なうには従来と同様
にギヤケース７を所要の舷側に揺動させればよいが、こ
の場合第３図に示すように、固定前とギヤケースの外側
面が連続する流線形を形成する。したがって、旋回半径
外側のギヤケース後方部分に流れ込む水の迎角の変化が
小さくなり、水の流れが滑らかとなり、水流の剥離が防
止される。Therefore, in order to make a turn while the ship is sailing, it is sufficient to swing the gear case 7 to the required side as in the past, but in this case, as shown in Fig. 3, the outside surface of the gear case is Forms a continuous streamline. Therefore, the change in the angle of attack of the water flowing into the rear portion of the gear case on the outside of the turning radius is reduced, the water flow becomes smooth, and separation of the water flow is prevented.
なお、上記実施例においては、船外機を取り着けた船に
ついて説明したが、同様な方式で推進及び旋回を行なう
スターンドライブの小型艇にも応用できる。In the above embodiment, a boat equipped with an outboard motor has been described, but the present invention can also be applied to a small stern drive boat that performs propulsion and turning in a similar manner.
以上説明したように、本発明においては、舵としての作
用を行なうギヤケースの前方に、そのギヤケースの側面
とともに全体が滑らかな翼型状の流線形をなすような固
定前を設けたので、ギヤケースを舷側に振った場合にも
旋回半径外側に沿う水の流れに剥離が生じにくくなり、
後方で回転するプロペラのスラストが減少することがな
く、旋回性能が向上する。また、上述のように水の流れ
に剥離が生じにくくなることから、ギヤケース側面に設
けられた吸水口における吸水性能の低下が防止され、エ
ンジントラブルが防止される。さらに、直進状態では舵
の弦長が増すことになり、直進安定性が向上する等の効
果を奏する。As explained above, in the present invention, in front of the gear case that functions as a rudder, a fixed front is provided that forms a smooth airfoil-like streamlined shape together with the side surfaces of the gear case. Even when swinging to the side, separation is less likely to occur in the water flow along the outside of the turning radius.
The thrust of the propeller rotating at the rear does not decrease, improving turning performance. Furthermore, as described above, since separation is less likely to occur in the flow of water, deterioration in water absorption performance at the water intake port provided on the side surface of the gear case is prevented, and engine troubles are prevented. Furthermore, in the straight-ahead state, the chord length of the rudder increases, which has the effect of improving straight-ahead stability.
第１図は本発明の操舵装置の概略構成を示す側面図、第
２図はギヤケースおよび固定舵の平断面図、第３図は旋
回時の水流状態を示す説明図、第４図は従来の船外機の
概略構成を示す側面図、第５図は従来の装置における旋
回作動状態説明図、第６図は従来の装置におけるギヤケ
ース側面の水の流れを示す説明図である。
１・・・船外機、２・・・クランプブラケット、７・・
ギヤケース、８・・・スイベルケース、１１・・・固定
舵。
出願人代理人 佐 藤 −雄
甚
副
羊
図Fig. 1 is a side view showing the schematic configuration of the steering device of the present invention, Fig. 2 is a plan cross-sectional view of the gear case and fixed rudder, Fig. 3 is an explanatory diagram showing the state of water flow during turning, and Fig. 4 is a conventional FIG. 5 is a side view showing a schematic configuration of an outboard motor, FIG. 5 is an explanatory diagram of a swing operation state in a conventional device, and FIG. 6 is an explanatory diagram showing the flow of water on the side surface of a gear case in a conventional device. 1... Outboard motor, 2... Clamp bracket, 7...
Gear case, 8... Swivel case, 11... Fixed rudder. Applicant's agent Sato - Yujin sub-sheep map
Claims (1)
よって旋回力を得るようにした小型艇の操舵装置におい
て、上記ギヤケースの前方に、そのギヤケースの側面と
ともに全体が滑らかな翼型状の流線形をなすような固定
舵を設けたことを特徴とする、小型艇の操舵装置。In a steering system for a small boat that obtains turning force by swinging a gear case having a propeller at the rear from side to side, the gear case is designed to have a smooth airfoil-like streamline shape as a whole along with the sides of the gear case in front of the gear case. A steering device for a small boat, characterized by being equipped with a fixed rudder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1105521A JP2794768B2 (en) | 1989-04-25 | 1989-04-25 | Small boat steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1105521A JP2794768B2 (en) | 1989-04-25 | 1989-04-25 | Small boat steering system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02283595A true JPH02283595A (en) | 1990-11-21 |
| JP2794768B2 JP2794768B2 (en) | 1998-09-10 |
Family
ID=14409906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1105521A Expired - Lifetime JP2794768B2 (en) | 1989-04-25 | 1989-04-25 | Small boat steering system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2794768B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100888356B1 (en) * | 2000-06-12 | 2009-03-11 | 프리스케일 세미컨덕터, 인크. | Processor having selective branch prediction |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6315200A (en) * | 1986-07-07 | 1988-01-22 | 三菱原子力工業株式会社 | Phosphate vitrifying processing method of radioactive boric acid waste liquor |
-
1989
- 1989-04-25 JP JP1105521A patent/JP2794768B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6315200A (en) * | 1986-07-07 | 1988-01-22 | 三菱原子力工業株式会社 | Phosphate vitrifying processing method of radioactive boric acid waste liquor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100888356B1 (en) * | 2000-06-12 | 2009-03-11 | 프리스케일 세미컨덕터, 인크. | Processor having selective branch prediction |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2794768B2 (en) | 1998-09-10 |
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