JPH057970U - 2 cycle engine cylinder - Google Patents

2 cycle engine cylinder

Info

Publication number
JPH057970U
JPH057970U JP6098991U JP6098991U JPH057970U JP H057970 U JPH057970 U JP H057970U JP 6098991 U JP6098991 U JP 6098991U JP 6098991 U JP6098991 U JP 6098991U JP H057970 U JPH057970 U JP H057970U
Authority
JP
Japan
Prior art keywords
cylinder
plug
spark plug
wrench
cycle 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.)
Granted
Application number
JP6098991U
Other languages
Japanese (ja)
Other versions
JP2537528Y2 (en
Inventor
富也 加藤
芳雄 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP1991060989U priority Critical patent/JP2537528Y2/en
Publication of JPH057970U publication Critical patent/JPH057970U/en
Application granted granted Critical
Publication of JP2537528Y2 publication Critical patent/JP2537528Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Ignition Installations For Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

(57)【要約】 【目的】 プラグレンチ55で点火プラグ54をエンジ
ンシリンダに脱着する際シリンダフィン52を傷めるこ
となく、又点火プラグの確実な締付を可能とする。 【構成】 空冷小型エンジンのシリンダに点火プラグを
傾斜して取付けたものにおいて、点火プラグ締付ねじボ
ス51aの周囲の任意の位置でプラグレンチの挿入方向
端面にストッパ53をシリンダ51と一体的に突設した
ことを特徴としている。
(57) [Abstract] [Purpose] When the spark plug 54 is attached to and detached from the engine cylinder with the plug wrench 55, the cylinder fin 52 is not damaged and the spark plug can be securely tightened. In a cylinder of an air-cooled small engine in which a spark plug is inclined and attached, a stopper 53 is integrally formed with the cylinder 51 at an end face in a plug wrench insertion direction at an arbitrary position around a spark plug fastening screw boss 51a. It is characterized by protruding.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案は小型機器に使用される小形空冷2サイクル内燃機関に関する。 The present invention relates to a small air-cooled two-cycle internal combustion engine used for small equipment.

【0002】[0002]

【従来の技術】[Prior Art]

小型空冷2サイクル機関のシリンダ3にはシリンダ壁3bの外側に多数の放熱 フィン3aを形成しており、前記シリンダの頂部には燃焼室を備え、ピストンリ ング5を嵌装したピストン4がシリンダ3内に挿入され、前記ピストン4は図示 しないコネクチングロッドを介して図示しないクランクケース内の図示しないク ランク軸に連結されている。 ファンカバー8の排気口8bはシリンダ3方向に指向され、シリンダ3を覆う シリンダカバー9の開口と接合されている。 In the cylinder 3 of a small air-cooled two-cycle engine, a large number of heat radiation fins 3a are formed outside the cylinder wall 3b, a combustion chamber is provided at the top of the cylinder, and a piston 4 fitted with a piston ring 5 is provided in the cylinder 3. The piston 4 is inserted into a crankshaft (not shown) in a crankcase (not shown) via a connecting rod (not shown). The exhaust port 8b of the fan cover 8 is directed toward the cylinder 3 and is joined to the opening of the cylinder cover 9 that covers the cylinder 3.

【0003】 前記ファンカバー8の頂部には上方に延出した点火栓ガード8cが形成され、 後述の点火栓14は外部の物体が衝突しないよう保護されている。さらに前記点 火栓ガード8cには点火栓14の脱着時、工具20を差し込む窓8dが設けられ ている。又シリンダカバー9の点火栓14と反対側には排風口9aが開口すると 共に、点火栓14の周りには膨出部9bを頂部に形成して、ファンカバー8の切 欠部8gと共に点火栓挿入口9cを形成している。A spark plug guard 8c extending upward is formed on the top of the fan cover 8, and a spark plug 14 described later is protected so as not to collide with an external object. Further, the spark plug guard 8c is provided with a window 8d into which the tool 20 is inserted when the spark plug 14 is attached or detached. An exhaust port 9a is opened on the opposite side of the cylinder cover 9 from the spark plug 14, and a bulging portion 9b is formed around the spark plug 14 at the top, and together with the cutout portion 8g of the fan cover 8, the spark plug 9a is formed. The insertion port 9c is formed.

【0004】 前記切欠部8gはファンカバー8の頂部壁面8fに形成されている。点火栓1 4は、シリンダヘッドに対してファンカバー8側へ倒れた状態でねじ止めされ、 その先端は燃焼室3cに臨んで設けられている。 上記のように構成された点火栓を交換するときには、点火栓キャップを外して 工具20を窓8dから挿入してファンカバー8を外すことなく点火栓14の取付 け、取外しができるように構成されている。The cutout portion 8g is formed on the top wall surface 8f of the fan cover 8. The spark plug 14 is screwed to the cylinder head in a state of being tilted toward the fan cover 8 side, and its tip is provided so as to face the combustion chamber 3c. When replacing the spark plug constructed as described above, the spark plug cap is removed, the tool 20 is inserted through the window 8d, and the spark plug 14 can be attached and removed without removing the fan cover 8. ing.

【0005】[0005]

【考案が解決しようとする課題】 ところが前記のように点火栓がシリンダに傾斜して取付けられた従来構造では 、点火栓を脱着する際プラグレンチにより点火プラグに最も近いフィンが傷付く ことがしばしばある。又特にレンチの2面巾部がシリンダフィンの上面と平行に なった場合、プラグとシリンダのフィンの間にプラグレンチが深くはさまってし まい、点火プラグの締付が充分行われない場合がある。However, in the conventional structure in which the spark plug is inclined and attached to the cylinder as described above, the fin closest to the spark plug is often scratched by the plug wrench when the spark plug is detached and attached. is there. Also, especially when the width across flats of the wrench is parallel to the upper surface of the cylinder fin, the plug wrench may be deeply sandwiched between the plug and the fin of the cylinder, and the ignition plug may not be sufficiently tightened.

【0006】 本考案の目的は前記従来装置の問題点を解消し、シリンダのフィンを傷付ける ことなくプラグレンチで確実に点火プラグの締付が可能な2サイクルエンジンの シリンダを提供するにある。An object of the present invention is to solve the problems of the conventional device and to provide a cylinder of a two-cycle engine in which a spark wrench can be securely tightened without damaging the fins of the cylinder.

【0007】[0007]

【課題を解決するための手段】[Means for Solving the Problems]

本考案の2サイクルエンジンのシリンダは点火プラグをシリンダに傾斜して取 付けたものにおいて、点火プラグ締付ねじボスの周囲の任意の位置でプラグレン チの挿入方向端面にストッパをシリンダと一体的に成形したことを特徴としてい る。 In the cylinder of the two-cycle engine of the present invention, the spark plug is inclinedly attached to the cylinder, and a stopper is integrally formed with the cylinder at an arbitrary position around the spark plug tightening screw boss at the end face in the insertion direction of the plug lench. It is characterized by being molded.

【0008】[0008]

【作用】[Action]

点火プラグによって点火栓を脱着する際、プラグレンチの先端の六角部が点火 プラグの六角部に嵌め込まれるが、点火プラグ締付ねじボス部の端面に設けられ た前記端面ストッパのため、レンチが奥まで入ることがなくなり、フィンを傷付 けることはない。又レンチの対辺部が前記ストッパのためシリンダ内にはさまる ことがなくなるので、プラグの締付けが確実となる。 When removing the spark plug with the spark plug, the hexagonal part of the tip of the plug wrench fits into the hexagonal part of the spark plug. It will not get in and will not damage the fins. Also, since the opposite side of the wrench does not get caught in the cylinder because of the stopper, the plug can be tightened securely.

【0009】[0009]

【実施例】【Example】

以下図1〜3を参照し本考案の一実施例について説明する。 図1はエンジンの点火プラグの取付状態断面図、図2は点火プラグ付近の拡大 図、図3は図2のIII 矢視図である。 点火プラグ54を脱着操作時には図の如くシリンダカバー56のプラグレンチ 挿入穴56aよりプラグレンチ55を挿入し、該レンチ55の六角部55aを点 火プラグ六角部54aに嵌合させ、図2に示すプラグレンチ端面55bがシリン ダ51のプラグ取付用ねじボス51aとシリンダフィン52の間に設けたストッ パ53に当接してプラグレンチ55の差込み深さが余り深くならないようにして いる。 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view of the engine ignition plug in a mounted state, FIG. 2 is an enlarged view of the vicinity of the ignition plug, and FIG. When the ignition plug 54 is attached or detached, the plug wrench 55 is inserted through the plug wrench insertion hole 56a of the cylinder cover 56 as shown in the figure, and the hexagonal portion 55a of the wrench 55 is fitted to the ignition plug hexagonal portion 54a, as shown in FIG. The end surface 55b of the plug wrench abuts on the stopper 53 provided between the plug mounting screw boss 51a of the cylinder 51 and the cylinder fin 52 so that the insertion depth of the plug wrench 55 does not become too deep.

【0010】 従ってこの場合、図2の2点鎖線で示す状態の時でもプラグレンチ55の六角 部頂点部がシリンダフィン52に接触しないようにすると共に、プラグ54の六 角部54aとプラグレンチ55の六角部55a部が確実にラップするような図2 〜3に図示の板状で高さlのストッパを設けたことを特徴としている。Therefore, in this case, the hexagonal apex of the plug wrench 55 is prevented from coming into contact with the cylinder fin 52 even in the state shown by the two-dot chain line in FIG. It is characterized in that a plate-shaped stopper having a height of l shown in FIGS.

【0011】 次に前記実施例の作用について説明する。 前記ストッパ53を設けることにより、点火プラグ54の脱着操作時プラグレ ンチ55の六角頂点部55c又は対辺部55dからフィン52までの間隙が拡大 すると共に間隙変化率が縮小するため、操作性が向上すると同時に、プラグレン チ55の六角対辺部55cがシリンダフィン52に当たり、締付時回転方向の抵 抗により締付トルクの不足を生じることがなくなる。 なお図1〜3において56はシリンダカバーであり56aはプラグレンチ55 の挿入穴を示し、57はマフラカバー、58はマフラ(図示せず)のガスケット 、59はインシュレータ(図示せず)のガスケット、60はピストンを示す。Next, the operation of the above embodiment will be described. By providing the stopper 53, the gap between the hexagonal apex 55c or the opposite side 55d of the plug lengh 55 or the opposite side 55d and the fin 52 is increased and the rate of change of the gap is reduced when the ignition plug 54 is attached / detached, so that the operability is improved. At the same time, the hexagonal opposite sides 55c of the plug lens 55 hit the cylinder fins 52, and the tightening torque is not insufficient due to the resistance in the rotating direction during tightening. 1 to 3, 56 is a cylinder cover, 56a is an insertion hole of the plug wrench 55, 57 is a muffler cover, 58 is a muffler (not shown) gasket, 59 is an insulator (not shown) gasket, Reference numeral 60 represents a piston.

【0012】[0012]

【考案の効果】[Effect of the device]

空冷2サイクルエンジンのシリンダにプラグレンチ挿入用ストッパを新設する ことにより、点火プラグの脱着操作時、点火プラグ近傍のシリンダフィンがプラ グレンチにより傷つけられることがなくなり、又プラグレンチの対辺部がフィン の間にはさまる状態となることがなくなり、点火プラグの締付が確実化される。 By newly installing a plug wrench insertion stopper on the cylinder of the air-cooled two-cycle engine, the cylinder fin near the spark plug is not damaged by the plug wrench when the spark plug is attached / detached, and the opposite side of the plug wrench has a fin. The state of being sandwiched between them is eliminated, and the tightening of the spark plug is ensured.

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案に係るエンジンシリンダ部分断面図。FIG. 1 is a partial sectional view of an engine cylinder according to the present invention.

【図2】図1の点火栓部拡大図。FIG. 2 is an enlarged view of an ignition plug portion of FIG.

【図3】図2のIII 矢視図。FIG. 3 is a view on arrow III in FIG.

【図4】従来例の図2応当図。FIG. 4 is a corresponding diagram of FIG. 2 of a conventional example.

【符号の説明】[Explanation of symbols]

51…シリンダ、51a…シリンダの点火プラグ締付ね
じボス、52…シリンダフィン、53…プラグレンチの
ストッパ、54…点火プラグ、55…プラグレンチ、5
6…シリンダカバー。
51 ... Cylinder, 51a ... Cylinder ignition plug tightening screw boss, 52 ... Cylinder fin, 53 ... Plug wrench stopper, 54 ... Spark plug, 55 ... Plug wrench, 5
6 ... Cylinder cover.

Claims (1)

【実用新案登録請求の範囲】 【請求項1】 点火プラグを傾斜して取付けた小形2サ
イクルエンジンのシリンダにおいて、点火プラグ締付ね
じボスの周囲の任意の位置でプラグレンチの挿入方向端
面にストッパをシリンダと一体的に突設したことを特徴
とする小形2サイクルエンジンのシリンダ。
[Claims for utility model registration] [Claim 1] In a cylinder of a small two-cycle engine in which a spark plug is installed at an inclination, a stopper is provided at an end face in the insertion direction of a plug wrench at an arbitrary position around the spark plug tightening screw boss. A small two-cycle engine cylinder characterized in that the cylinder and the cylinder are integrally projected.
JP1991060989U 1991-07-09 1991-07-09 Two-stroke engine cylinder Expired - Fee Related JP2537528Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1991060989U JP2537528Y2 (en) 1991-07-09 1991-07-09 Two-stroke engine cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1991060989U JP2537528Y2 (en) 1991-07-09 1991-07-09 Two-stroke engine cylinder

Publications (2)

Publication Number Publication Date
JPH057970U true JPH057970U (en) 1993-02-02
JP2537528Y2 JP2537528Y2 (en) 1997-06-04

Family

ID=13158358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1991060989U Expired - Fee Related JP2537528Y2 (en) 1991-07-09 1991-07-09 Two-stroke engine cylinder

Country Status (1)

Country Link
JP (1) JP2537528Y2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5844078U (en) * 1981-07-09 1983-03-24 エフア−ル・カイザ−・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Insect paper
JPS6168801U (en) * 1984-10-05 1986-05-12
JPH04103478U (en) * 1991-02-14 1992-09-07 株式会社ムツシユ adhesive peeling paper
JPH04103477U (en) * 1991-02-14 1992-09-07 株式会社ムツシユ adhesive peeling paper

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53117810U (en) * 1977-02-26 1978-09-19
JPS56103624U (en) * 1980-01-11 1981-08-13
JPH0285848U (en) * 1988-12-22 1990-07-06

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53117810U (en) * 1977-02-26 1978-09-19
JPS56103624U (en) * 1980-01-11 1981-08-13
JPH0285848U (en) * 1988-12-22 1990-07-06

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5844078U (en) * 1981-07-09 1983-03-24 エフア−ル・カイザ−・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Insect paper
JPS6168801U (en) * 1984-10-05 1986-05-12
JPH04103478U (en) * 1991-02-14 1992-09-07 株式会社ムツシユ adhesive peeling paper
JPH04103477U (en) * 1991-02-14 1992-09-07 株式会社ムツシユ adhesive peeling paper

Also Published As

Publication number Publication date
JP2537528Y2 (en) 1997-06-04

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Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 19970114

LAPS Cancellation because of no payment of annual fees