JPS603387Y2 - engine crankshaft - Google Patents
engine crankshaftInfo
- Publication number
- JPS603387Y2 JPS603387Y2 JP1979087671U JP8767179U JPS603387Y2 JP S603387 Y2 JPS603387 Y2 JP S603387Y2 JP 1979087671 U JP1979087671 U JP 1979087671U JP 8767179 U JP8767179 U JP 8767179U JP S603387 Y2 JPS603387 Y2 JP S603387Y2
- Authority
- JP
- Japan
- Prior art keywords
- needle bearing
- connecting rod
- crank
- large end
- assembled
- 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
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【考案の詳細な説明】
本案はエンジンのコネクチングロッドの大端部に飛沫潤
滑油の供給を容易ならしめて冷却並に潤滑の改善を計す
コネクチングロツド（以下ロッドと言う）の大端部の焼
損事故を防止せんとする改良に係る。[Detailed description of the invention] This invention is designed to improve cooling and lubrication by facilitating the supply of splash lubricating oil to the large end of the connecting rod (hereinafter referred to as the "rod") of the engine. This relates to improvements aimed at preventing burnout accidents.
特に２サイクルエンジンの場合の如く混合燃料による潤
滑方式のものは、飛沫潤滑の供給の難易が焼損発生の頻
度に多大の関係が有ることは自明である。Particularly in the case of two-stroke engines that use mixed fuel for lubrication, it is obvious that the difficulty in supplying droplet lubrication has a great deal to do with the frequency of burnouts.
ましてやロッド大端部は軸承線速度も高いから潤滑と冷
却が必要である。Furthermore, the large end of the rod has a high bearing linear speed, so lubrication and cooling are necessary.
以下実施例による詳細な説明を行う。A detailed explanation will be given below using examples.
第１図にクランクシャフトとピストンの組み立ての側面
図を、第２図に第１図■−■矢視断面図を、また第３図
には、第１図の一部拡大詳細図を示した。Fig. 1 shows a side view of the assembly of the crankshaft and piston, Fig. 2 shows a sectional view taken along the arrows in Fig. 1, and Fig. 3 shows a partially enlarged detailed view of Fig. 1. .
本考案実施例は、２サイクルエンジンのピストン、コネ
クチングロッド及びクランクピンの組み立て上のロッド
大端部の潤滑給油の具体的構造に関する。The embodiment of the present invention relates to a specific structure for lubricating the big end of a piston, connecting rod, and crank pin of a two-stroke engine.
ピストン１はピストンピン１０によってロッド２の小端
部４と連結する。The piston 1 is connected to the small end 4 of the rod 2 by a piston pin 10.
このときピストンピンボス側面との間隙を規制（小端部
規制と言う）してロッド２の横振れを限定している。At this time, the gap between the rod 2 and the side surface of the piston pin boss is regulated (referred to as small end regulation) to limit lateral vibration of the rod 2.
ロッド２の大端部５は、ケージ１３付ニードルベヤリン
グ６を嵌着してクランクピン３に遊嵌し、クランクアー
ム７．７に挟在して組み立っている。The large end 5 of the rod 2 is fitted with a needle bearing 6 with a cage 13, loosely fitted onto the crank pin 3, and assembled between the crank arms 7.7.
これらが更に、本体クランクケース及びシリンダに組み
付けられるとき、ピストン１、シリンダー及びロッド２
は、夫々前記小端部規制と共に夫々寸法許容範囲内で規
制されて、ロッド２の大端部５は、クランクピン３の所
定の位置に保持され、大端部５の両側面はクランクアー
ム７．７の内側面と所定の間隙を保つことができる。When these are further assembled into the main body crankcase and cylinder, the piston 1, cylinder and rod 2
are each regulated within a dimensional tolerance along with the small end regulation, and the large end 5 of the rod 2 is held at a predetermined position on the crank pin 3, and both sides of the large end 5 are attached to the crank arm 7. A predetermined gap can be maintained with the inner surface of .7.
このロッド大端部５の対面するクランクアーム７．７の
内側の前記ニードルベヤリング６のケージ１３との対向
面部の外周を削除してクランクピン３の周囲に環状台形
当り面８を残して周辺を低く形成し、前記ニードルベヤ
リング６の外径りに対して環状台形当り面８の直径は小
径ｄをもって形成している。The outer periphery of the surface facing the cage 13 of the needle bearing 6 on the inner side of the crank arm 7.7 facing the large end of the rod 5 is removed, leaving an annular trapezoidal contact surface 8 around the crank pin 3. The annular trapezoidal contact surface 8 is formed to have a small diameter d relative to the outer diameter of the needle bearing 6.
この結果前記ニードルベヤリング６の外周部１２附近に
は、前記間隙とこれに連続して外周側で拡巾された段付
き間隙９，９が形成され、ニードルベヤリング６の外周
部１２のすくなくとも一部が露出されてこの周囲の間隙
を通じてクランク室内混合気と直接接触してガスの交流
が充分に可能になる。As a result, in the vicinity of the outer circumference 12 of the needle bearing ring 6, step gaps 9, 9 are formed that are continuous with the gap and widened on the outer circumference side, and at least part of the outer circumference 12 of the needle bearing ring 6 is formed. is exposed and comes into direct contact with the air-fuel mixture in the crank chamber through this peripheral gap, allowing sufficient gas exchange.
以上の結果、本案は下記の如き作用効果を奏する。As a result of the above, the present invention has the following effects.
上記の如く段付き間隙を設けたことによりクランクピン
基部の強度を損ねることなくニードルベヤリング６の外
周部１２附近に充分な巾を有する間隙を与えることが出
来るので、クランクシャフト１１の回転、ロッド２の上
下動等によって、クランク室内混合気燃料ガスが容易に
間隙中に侵入通過しながら、ニードルベヤリング６等に
衝突接触して、ベヤリング部の湿潤冷却作用を果し潤滑
に貢献する。By providing the stepped gap as described above, it is possible to provide a gap with a sufficient width near the outer circumference 12 of the needle bearing 6 without impairing the strength of the crankpin base. Due to the vertical movement of the crankshaft, the mixture fuel gas in the crank chamber easily enters and passes through the gap, collides with the needle bearing ring 6, etc., and performs a moist cooling effect on the bearing portion, contributing to lubrication.
かくて本案実施のロッドとクランクシャフトとは、ロッ
ドが小端規制によって大端部側の側圧負荷を軽減し、詳
記せる如く大端部の油潤滑を向上し冷却を助け、軸承の
焼損の防止に貢献するものである。In this way, the rod and crankshaft implemented in this invention reduce the lateral pressure load on the large end side by restricting the small end of the rod, improve oil lubrication at the large end as described in detail, aid cooling, and prevent bearing burnout. This contributes to prevention.
第口図：クランクシャフトとピストンの組み立ての側面
図、第２図：第１図■−■矢視断面図、第３図：第１図
の一部拡大詳細図。
１・・・・・ピストン、２・・・・・・コネクチングロ
ッド、３・・・・・・クランクピン、４・・・・・・小
端部、５・曲・大端部、６・・・・・・ケージ付ニード
ルベヤリング、７，７・・・・・・クランクアーム、８
・・・・・・環状台形当り面、９．９・・・・・・段付
き間隙、１２・・・・・・ニードルベヤリング外周部。Figure 2: A sectional view taken along arrows 1--2 in Figure 1. Figure 3: A partially enlarged detailed view of Figure 1. 1... Piston, 2... Connecting rod, 3... Crank pin, 4... Small end, 5... Bent large end, 6... ...Needle bearing with cage, 7,7...Crank arm, 8
...Annular trapezoidal contact surface, 9.9...Stepped gap, 12...Needle bearing ring outer periphery.
Claims (1)
ンクピン３で組み立った運動部分において、コネクチン
グロッド２を小端部４規制方式の組立てを行い、コネク
チングロッド大端部５にケージ付ニードルベヤリング６
を嵌装して両クランクアーム７．７の内側の前記ニード
ルベヤリング６のケージ１３との対向面部の外周を削除
して前記ニードルベヤリング６の外径りより小径ｄな環
状台形当り面８をクランクピン３の周囲に設け、コネク
チングロッド２の大端部５両側面と前記クランクアーム
７．７の内側面とに段付き間隙９゜９を設ける如くして
少くともニードルベヤリング６の外周部１２の一部を露
出せしめてクランク室内燃料混合気と直接接触して潤滑
され易くせしめたことを特徴とするエンジンの組み立て
形クランクシャフト。In the moving part assembled with the piston 1, connecting rod 2, and crank pin 3 of the engine, the connecting rod 2 is assembled with a small end 4 restriction method, and a caged needle bearing 6 is attached to the large end 5 of the connecting rod.
The outer periphery of the surface of the needle bearing 6 facing the cage 13 on the inside of both crank arms 7.7 is removed to create an annular trapezoidal contact surface 8 having a smaller diameter d than the outer diameter of the needle bearing 6. At least the outer periphery 12 of the needle bearing 6 is provided around the pin 3, and a stepped gap 9.9 is provided between both sides of the large end 5 of the connecting rod 2 and the inner side of the crank arm 7.7. An assembled crankshaft for an engine, characterized in that a part of the crankshaft is exposed so as to be easily lubricated by direct contact with the fuel mixture in the crank chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979087671U JPS603387Y2 (en) | 1979-06-28 | 1979-06-28 | engine crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979087671U JPS603387Y2 (en) | 1979-06-28 | 1979-06-28 | engine crankshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS567116U JPS567116U (en) | 1981-01-22 |
| JPS603387Y2 true JPS603387Y2 (en) | 1985-01-30 |
Family
ID=29320878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979087671U Expired JPS603387Y2 (en) | 1979-06-28 | 1979-06-28 | engine crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603387Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58182014U (en) * | 1982-05-31 | 1983-12-05 | 川崎重工業株式会社 | integrated crankshaft |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1249020B (en) * | 1967-08-31 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4721012U (en) * | 1972-03-08 | 1972-11-09 |
-
1979
- 1979-06-28 JP JP1979087671U patent/JPS603387Y2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1249020B (en) * | 1967-08-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS567116U (en) | 1981-01-22 |
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