JPS646330B2 - - Google Patents
Info
- Publication number
- JPS646330B2 JPS646330B2 JP22258082A JP22258082A JPS646330B2 JP S646330 B2 JPS646330 B2 JP S646330B2 JP 22258082 A JP22258082 A JP 22258082A JP 22258082 A JP22258082 A JP 22258082A JP S646330 B2 JPS646330 B2 JP S646330B2
- Authority
- JP
- Japan
- Prior art keywords
- governor
- crankshaft
- weight
- tip
- engine
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/04—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by mechanical means dependent on engine speed, e.g. using centrifugal governors
- F02D1/045—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by mechanical means dependent on engine speed, e.g. using centrifugal governors characterised by arrangement of springs or weights
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
【発明の詳細な説明】
本発明は２サイクル機関の調速装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speed governor for a two-stroke engine.
従来より、第４図に示すように、２サイクル機
関の調速装置としては、クランクシヤフトａのク
ランクウエブｂ寄りにクランク室ｃとは別体にガ
バナ室ｄを設け、該ガバナ室ｄ内に潤滑油を注入
して、クランクシヤフトａに連係されたガバナ機
構の潤滑をしている。しかしながら、クランク室
ｃとガバナ室ｄとを別体として設けることは、エ
ンジンのクランク軸方向の寸法が長くなり、また
ガバナ機構を別体とすることによりコスト高とな
りしかもエンジン全体の重量が増加する。更にク
ランク室内の潤滑とは別にガバナ室内の潤滑を行
なわなければならずオイルの注入、交換、点検等
の保守管理が煩雑となるという多くの欠点を有し
でいる。そこで、上記欠点を解消すべく、クラン
ク室内に調速装置を設けるものが実開昭57−
59942号公報によつて提案されているが、これは
クランク軸のウエイト部側面に案内穴を穿設する
もので、加工性、組立て性の点で問題を残してい
る。 Conventionally, as shown in Fig. 4, as a speed governor for a two-stroke engine, a governor chamber d is provided separate from the crank chamber c near the crank web b of the crankshaft a, and a governor chamber d is provided within the governor chamber d. Lubricating oil is injected to lubricate the governor mechanism linked to the crankshaft a. However, providing the crank chamber c and governor chamber d as separate units increases the dimension of the engine in the crankshaft direction, and providing the governor mechanism separately increases costs and increases the overall weight of the engine. . Furthermore, it has many disadvantages in that the governor chamber must be lubricated separately from the crank chamber, making maintenance such as oil injection, oil replacement, inspection, etc. complicated. Therefore, in order to eliminate the above-mentioned drawbacks, a system was developed in which a speed governor was installed inside the crank chamber.
This method has been proposed in Japanese Patent No. 59942, but this method involves drilling a guide hole in the side surface of the weight portion of the crankshaft, which leaves problems in terms of workability and assemblability.
本発明はかかる点に鑑み、ガバナ機構をバラン
スウエイト部に近接して設けることにより、エン
ジンの小型化、軽量化を図るとともに、バランス
ウエイト部の形状に着目し、バランスウエイト部
の平坦面の先端部付近にガバナウエイトを取り付
けることにより、加工性、組立て性および調速応
答性の向上を図り、さらにガバナ機構の潤滑をク
ランク室内の潤滑油によつて行ない得るように構
成した２サイクル機関の調速装置を提供するもの
である。 In view of these points, the present invention aims to reduce the size and weight of the engine by providing a governor mechanism close to the balance weight part, and also focuses on the shape of the balance weight part, and the tip of the flat surface of the balance weight part By attaching a governor weight near the crankshaft, workability, ease of assembly, and speed regulating response are improved, and the governor mechanism is also lubricated using lubricating oil in the crank chamber. It provides a speed device.
以下、本発明の構成を実施例について、図面に
基づいて説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to embodiments based on the drawings.
第１図ないし第３図において、１はクランクシ
ヤフト、２はクランクウエブで、３はピストン
（図示省略）に連設されたコンロツドである。４
はガバナウエイトで、前記クランクウエブ２のバ
ランスウエイト部２１の平担面２２上のクランク
シヤフト１の軸芯から離間された先端部付近に取
り付けられ、ガバナウエイト軸４１に対して第２
図中Ｐ方向に回動自在に枢支されている。すなわ
ち、ガバナウエイト４のガバナウエイト軸４１は
クランクシヤフト１の軸芯に対して直角の方向に
設けられている。５はクランク室８内においてク
ランクシヤフト１で上記バランスウエイト部２１
に隣接した位置に嵌装されたガバナスリーブで、
クランクシヤフト１の軸芯方向に変位自在に設け
られている。６は速度制御用ガバナレバー６１に
固着されたガバナチツプで、ガバナチツプ６の先
端部６２はガバナレバー６１に取り付けられたガ
バナスプリング７によつて、前記ガバナスリーブ
５の鍔状面５１に圧接されている。ガバナレバー
６１の先端部６３は、気化器のスロツトル弁（図
示省略）に連係されており、ガバナレバー６１の
揺動動作によつてスロツトル弁の開閉動作が行な
われる。 In FIGS. 1 to 3, 1 is a crankshaft, 2 is a crank web, and 3 is a connecting rod connected to a piston (not shown). 4
is a governor weight, which is attached to the vicinity of the tip part spaced from the axis of the crankshaft 1 on the flat surface 22 of the balance weight part 21 of the crank web 2, and is attached to the second part with respect to the governor weight axis 41.
It is rotatably supported in the P direction in the figure. That is, the governor weight shaft 41 of the governor weight 4 is provided in a direction perpendicular to the axis of the crankshaft 1. 5 is the balance weight part 21 in the crankshaft 1 in the crank chamber 8.
The governor sleeve is fitted adjacent to the
It is provided so as to be freely displaceable in the axial direction of the crankshaft 1. Reference numeral 6 denotes a governor chip fixed to a speed control governor lever 61, and a tip end 62 of the governor chip 6 is pressed against the brim-shaped surface 51 of the governor sleeve 5 by a governor spring 7 attached to the governor lever 61. The tip 63 of the governor lever 61 is linked to a throttle valve (not shown) of the carburetor, and the throttle valve is opened and closed by the swinging operation of the governor lever 61.
上記構成からなる調速装置の動作を説明する
と、クランクウエブ２の回転に伴つてガバナウエ
イト４全体がクランクシヤフト１の軸芯回りに回
転し、この遠心力によつてガバナウエイト４はガ
バナウエイト軸４１に対して第２図中Ｐ方向に回
動する。この時、ガバナウエイト４はバランスウ
エイト部２１の平坦面２２の先端部付近に取り付
けられているために上記遠心力の作用を受け易
く、回動応答性が良く、即ち、ガバナ機構の調速
応答性が優れたものである。Ｐ方向に回動したガ
バナウエイト４によつて、ガバナスリーブ５がク
ランクシヤフト１の先端方向に摺動され変位され
る。このガバナスリーブ５の変位に従い、ガバナ
スリーブ５の鍔状面５１に先端部６２が圧接され
ているガバナチツプ６は、ガバナスプリング７の
付勢力に抗して、クランクシヤフト１の先端方向
（第１図中Ｑ方向）に押し出される。すなわち、
ガバナレバー６１を第１図中Ｒ方向に揺動させる
ことになる。ガバナレバー６１のＲ方向揺動に伴
い、ガバナレバー６１に連係されたスロツトル弁
の開度を減少させ、エンジンの回転数を減少させ
て、あらかじめ設定された回転速度に調整する。
エンジンの回転数の減少に伴いクランクウエブ２
の回転数も減少し、ガバナウエイト４に作用する
遠心力が低下する。この結果、エンジンの回転速
度が設定速度以下になると、ガバナレバー６１に
取り付けられたガバナスプリング７の付勢力が、
ガバナウエイト４に作用する遠心力より大とな
り、気化器のスロツトル弁は開く方向に動作し
て、エンジンの回転数が増大させ、再び設定速度
に調整する。 To explain the operation of the governor having the above configuration, the entire governor weight 4 rotates around the axis of the crankshaft 1 as the crank web 2 rotates, and this centrifugal force causes the governor weight 4 to rotate around the governor weight axis. 41 in the direction P in FIG. At this time, since the governor weight 4 is attached near the tip of the flat surface 22 of the balance weight section 21, it is easily affected by the centrifugal force and has good rotational response, that is, the speed regulating response of the governor mechanism. It has excellent properties. By the governor weight 4 rotated in the P direction, the governor sleeve 5 is slid and displaced toward the distal end of the crankshaft 1. According to this displacement of the governor sleeve 5, the governor tip 6, whose tip end 62 is pressed against the brim-like surface 51 of the governor sleeve 5, moves in the direction of the tip of the crankshaft 1 (see FIG. 1) against the biasing force of the governor spring 7. (in the middle Q direction). That is,
The governor lever 61 is then swung in the R direction in FIG. As the governor lever 61 swings in the R direction, the opening degree of the throttle valve linked to the governor lever 61 is decreased, and the engine rotational speed is reduced to adjust to a preset rotational speed.
Crank web 2 due to decrease in engine speed
The rotational speed of the governor weight 4 also decreases, and the centrifugal force acting on the governor weight 4 decreases. As a result, when the rotational speed of the engine becomes lower than the set speed, the biasing force of the governor spring 7 attached to the governor lever 61 is
This becomes larger than the centrifugal force acting on the governor weight 4, and the throttle valve of the carburetor operates in the opening direction, increasing the engine speed and adjusting it to the set speed again.
上記動作を繰り返してエンジンの回転速度を常
に一定の範囲内に保つのである。 By repeating the above operations, the engine speed is always kept within a certain range.
以上説明したように、本発明によれば、クラン
ク室内にガバナ機構を設けたため、エンジンのク
ランク軸方向の寸法を短かくすることができ、し
かもガバナ室を別に設ける必要がないため、その
分エンジンの重量が軽減され、全体として小型
化、軽量化が図れるものである。また、ガバナ機
構の潤滑は、エンジンの潤滑によつて行なわれる
から、別途オイルの注排出機構がなくてもよく、
保守整備も簡略化できる。さらに、バランスウエ
イト部の平坦面の先端部付近にガバナウエイトを
取り付ける構造であるから、加工性、組立て性お
よび調速応答性が著しく向上するという優れた効
果が得られる。 As explained above, according to the present invention, since the governor mechanism is provided in the crank chamber, the dimension of the engine in the crankshaft direction can be shortened, and there is no need to provide a separate governor chamber, so the engine The weight of the device is reduced, and the overall size and weight can be reduced. In addition, since the governor mechanism is lubricated by the engine's lubrication, there is no need for a separate oil injection and discharge mechanism.
Maintenance can also be simplified. Furthermore, since the governor weight is attached near the tip of the flat surface of the balance weight part, excellent effects such as significantly improved workability, assemblability, and speed control response can be obtained.
図面は本発明の実施態様を例示し、第１図はガ
バナ機構を具えたエンジンのクランク軸部を示す
縦断面図、第２図はガバナウエイトの取り付け状
態を示す平面図、第３図はクランクウエブのウエ
イト部を示す側面図、第４図は従来のガバナ機構
を具えたエンジンのクランク軸部を示す縦断面図
である。
１，ａ……クランクシヤフト、２，ｂ……クラ
ンクウエブ、３……コンロツド、４……ガバナウ
エイト、５……ガバナスリーブ、６……ガバナチ
ツプ、７……ガバナスプリング、８，ｃ……クラ
ンク室、２１……バランスウエイト部、２２……
上部平坦面、４１……ガバナウエイト軸、５１…
…鍔状面、６１……ガバナレバー、６２，６３…
…先端部、ｄ……ガバナ室。
The drawings illustrate embodiments of the present invention, in which Fig. 1 is a longitudinal sectional view showing the crankshaft of an engine equipped with a governor mechanism, Fig. 2 is a plan view showing how the governor weight is attached, and Fig. 3 is a crank FIG. 4 is a side view showing the weight portion of the web, and FIG. 4 is a longitudinal sectional view showing the crankshaft portion of an engine equipped with a conventional governor mechanism. 1,a...Crankshaft, 2,b...Crank web, 3...Conrod, 4...Governor weight, 5...Governor sleeve, 6...Governor tip, 7...Governor spring, 8,c...Crank Room, 21...Balance weight section, 22...
Upper flat surface, 41... Governor weight shaft, 51...
... Flange-shaped surface, 61 ... Governor lever, 62, 63 ...
...Tip, d...Governor chamber.
Claims (1)
ンスウエイト部の平坦面において、該平坦面の先
端部付近にガバナウエイトが、クランクシヤフト
の軸芯に対して直角の方向に設けられたガバナウ
エイト軸により回動自在に取り付けられるととも
に、上記クランクシヤフトでバランスウエイト部
に隣接した位置には、ガバナウエイトの回転によ
りクランクシヤフトの軸方向に変位自在とされた
ガバナスリーブが嵌装され、該ガバナスリーブに
は、気化器に連係されるガバナチツプの先端部が
圧接されることを特徴とする２サイクル機関の調
速装置。1. On the flat surface of the balance weight portion integrally provided on the crankshaft, a governor weight is rotated near the tip of the flat surface by a governor weight shaft provided in a direction perpendicular to the axis of the crankshaft. A governor sleeve is attached to the crankshaft so as to be movable and is displaceable in the axial direction of the crankshaft by rotation of the governor weight. A speed governor for a two-stroke engine, characterized in that the tip of a governor chip connected to a carburetor is pressed into contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22258082A JPS59110836A (en) | 1982-12-17 | 1982-12-17 | Governor in two-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22258082A JPS59110836A (en) | 1982-12-17 | 1982-12-17 | Governor in two-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59110836A JPS59110836A (en) | 1984-06-26 |
| JPS646330B2 true JPS646330B2 (en) | 1989-02-02 |
Family
ID=16784692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22258082A Granted JPS59110836A (en) | 1982-12-17 | 1982-12-17 | Governor in two-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59110836A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS471126U (en) * | 1971-01-19 | 1972-08-11 | ||
| JPS5840404Y2 (en) * | 1977-03-31 | 1983-09-12 | 株式会社クボタ | governor sleeve |
| JPS5512008U (en) * | 1978-07-07 | 1980-01-25 | ||
| JPS5531222U (en) * | 1978-08-21 | 1980-02-28 |
-
1982
- 1982-12-17 JP JP22258082A patent/JPS59110836A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59110836A (en) | 1984-06-26 |
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