JPH0320519Y2 - - Google Patents
Info
- Publication number
- JPH0320519Y2 JPH0320519Y2 JP1983083199U JP8319983U JPH0320519Y2 JP H0320519 Y2 JPH0320519 Y2 JP H0320519Y2 JP 1983083199 U JP1983083199 U JP 1983083199U JP 8319983 U JP8319983 U JP 8319983U JP H0320519 Y2 JPH0320519 Y2 JP H0320519Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- oil sump
- pin boss
- axis
- circumferential
- 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
- 239000003921 oil Substances 0.000 claims description 25
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【考案の詳細な説明】
本考案は、エンジンのピストンの外周面潤滑装
置に関し、ピストンとシリンダの摺擦面での焼付
や摩耗を防止してエンジンの耐久性を向上させる
ことを目的とする。[Detailed Description of the Invention] The present invention relates to a lubricating device for the outer circumferential surface of an engine piston, and aims to improve the durability of the engine by preventing seizure and wear on the sliding surfaces of the piston and cylinder.
一般に、レシプロ式エンジンのピストンは第６
図に示すように、ピストン１がシリンダ１９内を
上下摺動する時にピストンピン１６を中心とし
て、首を振つた状態で摺動することがある。 Generally, the piston of a reciprocating engine is the sixth
As shown in the figure, when the piston 1 slides up and down within the cylinder 19, it may slide around the piston pin 16 in an oscillating state.
こうした場合、ピストンピン１６に対して直交
方向のピストン周面部分２ｂの上下端部１７，１
８がその高い接圧のために早期に摩耗したり、こ
の部分で油膜切れを起して焼付いたりする。 In such a case, the upper and lower ends 17, 1 of the piston peripheral surface portion 2b in the direction orthogonal to the piston pin 16
8 wears out prematurely due to the high contact pressure, or the oil film breaks down in this area and seizes up.
そこで、ピストンの周面に複数の油溜用周溝を
形成し、この周溝に貯えた潤滑油でピストンとシ
リンダとを潤滑して摩耗及び焼付を防止するよう
にしたものがある。 Therefore, some pistons have a plurality of oil reservoir circumferential grooves formed on the circumferential surface of the piston, and lubricant oil stored in the circumferential grooves lubricates the piston and cylinder to prevent wear and seizure.
ところが、ピストンの周面に設けた油溜用周溝
は、その溝幅が全周に亘つて同じ幅で形成される
ことから、油溜用周溝部に形成される摺接用突状
周面の幅も全周に亘つて同じ幅で形成されピスト
ンが首を振つた状態で摺動する時に、シリンダに
接当している面圧の高い部分では摺接用突条が早
期に摩耗してしまい、その耐久性が悪くなる。 However, since the groove width for the oil sump provided on the circumferential surface of the piston is the same over the entire circumference, the protruding circumferential surface for sliding contact formed in the circumferential groove for the oil sump The width of the piston is the same all around the circumference, and when the piston slides with its head oscillating, the sliding contact ridges wear out prematurely in the areas where the contact pressure is high and the piston is in contact with the cylinder. and its durability deteriorates.
本考案は、上記欠点を解消するために提案され
たもので、ピストンの周面に設ける油溜用周溝の
開口部の溝幅を筒壁の周面上におけるピンボスの
軸心に近い左右両側面部分の方がピンボスの軸心
から遠い前後両側面部分よりも幅広くなる寸法に
形成し、油溜用周溝の開口部同士間の摺接用突条
周面の条幅を筒壁の周面上におけるピンボス軸心
に近い左右両側面部分よりもピンボス軸心から遠
い前後両側面部分の方が幅広くなる寸法に形成す
ることにより、ピストン周面の潤滑性を良好に保
ちながらも、ピストンの前後両側面部分の摩耗を
防止してその耐久性を向上させるようにするもの
である。 The present invention was proposed in order to eliminate the above-mentioned drawbacks, and the groove width of the opening of the oil sump circumferential groove provided on the circumferential surface of the piston is adjusted to the left and right sides of the circumferential surface of the cylinder wall near the axis of the pin boss. The surface portion is formed to be wider than the front and rear side portions that are far from the axis of the pin boss, and the width of the peripheral surface of the sliding contact ridge between the openings of the oil sump peripheral groove is made to be wider than the peripheral surface of the cylinder wall. By forming the front and rear side surfaces far from the pin boss axis to be wider than the left and right side surfaces near the pin boss axis, the front and rear side surfaces of the piston can maintain good lubricity on the piston circumferential surface. This prevents wear on both side surfaces and improves their durability.
以下、本考案の一実施例を図面に基き説明す
る。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図はピストンの側面図を示し、第２図は第
１図の−線断面図を示す。 FIG. 1 shows a side view of the piston, and FIG. 2 shows a sectional view taken along the line -- in FIG.
このピストン１は円筒状の筒壁２の中間高さ部
の左右両側壁部分２ｄに左右一対のピンボス３を
内方に向けて突出形成し、筒壁２の外周面２ｃの
上寄り部には２本のピストンリング溝４と１本の
オイルリング溝５とが設けてあり、両リング溝
４，５にはピストンリング６及びオイルリング７
がそれそれ嵌着されてリング部８を形成してあ
る。 This piston 1 has a pair of left and right pin bosses 3 protruding inward from the left and right side wall portions 2d of the intermediate height portion of the cylindrical wall 2, and the upper portion of the outer circumferential surface 2c of the cylindrical wall 2. Two piston ring grooves 4 and one oil ring groove 5 are provided, and both ring grooves 4 and 5 are provided with a piston ring 6 and an oil ring 7.
are fitted into each other to form a ring portion 8.
そして、リング部８の上方のトツプランド９と
ピストン１のスカート部１０の下部周面１１には
それぞれ３本の油溜用周溝１２を上下多段に刻設
してある。 Three oil sump circumferential grooves 12 are formed in the top land 9 above the ring part 8 and the lower circumferential surface 11 of the skirt part 10 of the piston 1 in multiple vertical stages.
この油溜用周溝１２はピストン１の筒壁２の周
面２ｃに環状に形成したもので、各油溜用周溝１
２の開口部１３の溝幅Ｗは、第３図及び第４図に
示すようになつている。 This oil sump circumferential groove 12 is formed in an annular shape on the circumferential surface 2c of the cylindrical wall 2 of the piston 1, and each oil sump circumferential groove 1
The groove width W of the opening 13 of No. 2 is as shown in FIGS. 3 and 4.
即ち、各油溜用周溝１２の開口部１３の溝幅Ｗ
は、筒壁２の周面上におけるピンボス３の軸心Ｃ
に近い左右両側面部分２ａの方がピンボス３の軸
心Ｃから遠い前後両側面部分２ｂよりも幅広く、
かつ、溝深さＤは深くなるように形成してある。 That is, the groove width W of the opening 13 of each oil sump circumferential groove 12
is the axis C of the pin boss 3 on the circumferential surface of the cylinder wall 2
The left and right side surface portions 2a that are closer to the pin boss 3 are wider than the front and rear side surface portions 2b that are farther from the axis C of the pin boss 3.
Moreover, the groove depth D is formed to be deep.
このように各油溜用周溝１２の開口部１３の溝
幅Ｗを形成すると、各油溜用周溝１２の開口部１
３同士間に形成される摺接用突条１４の条幅Ｎ
は、ピンボス３の軸心Ｃに近い左右両側面部分２
ａよりもピンボス３の軸心Ｃから遠い前後両側面
部分２ｂの方が広く、溝深さＤは浅くなるように
形成される。 When the groove width W of the opening 13 of each oil sump circumferential groove 12 is formed in this way, the opening 1 of each oil sump circumferential groove 12 is formed.
Width N of the sliding contact protrusion 14 formed between the three
are the left and right side parts 2 near the axis C of the pin boss 3
The front and rear side surfaces 2b that are farther from the axis C of the pin boss 3 are wider than the grooves A, and the groove depth D is formed to be shallower.
こうして、摺接用突条１４のピンボス３の軸心
Ｃから遠い前後両側面部分２ｂの条幅Ｎが広く形
成されると、第３図に示すようにピストン１の上
下摺動時にピストン１の前後両側壁部分２ａの接
圧が高くなる場合や、第６図に示すようにピスト
ン１がピストンピン１６を中心に首を振つた状態
でピストン１の前側頭部１７及びスカート部１０
の後部１８が部分当りして接圧が高くなるような
場合でも摺接用突条の広い条幅Ｎで確かりと受け
るようになる。 In this way, when the width N of both the front and rear side surfaces 2b of the sliding protrusion 14 far from the axis C of the pin boss 3 is formed wide, the front and back of the piston 1 move when the piston 1 slides up and down, as shown in FIG. When the contact pressure on both side wall portions 2a becomes high, or when the piston 1 swings around the piston pin 16 as shown in FIG.
Even if the rear part 18 of the contact pressure is high due to partial contact, the wide width N of the sliding protrusion ensures that the contact pressure is received reliably.
尚、上記実施例では油溜用周溝１２の断面形状
を台形としたが半円形や方形にしてもよい。 In the above embodiment, the cross-sectional shape of the oil sump circumferential groove 12 is trapezoidal, but it may be semicircular or rectangular.
以上に述べたように、本考案によれば、ピスト
ンの筒壁のリング部上方のトツプランドを潤滑す
る油溜用周溝間に形成される摺接用突条の条幅
を、ピンボスの軸心に近い左右両側面部分よりも
ピンボスの軸心から遠い前後両側面部分の方が広
くなるようにしてあるので、接当用突条の広い条
幅で接当するので面圧を低下させる。 As described above, according to the present invention, the width of the sliding protrusion formed between the oil sump circumferential grooves that lubricate the toppland above the ring portion of the cylinder wall of the piston is aligned with the axis of the pin boss. Since the front and rear side surfaces farther from the axis of the pin boss are wider than the closer left and right side surfaces, contact is made with the wider width of the abutting ridge, reducing surface pressure.
これにより、ピストンの前後両側面部分での摩
耗を防止して耐久性を向上できる。 This prevents wear on both the front and rear side surfaces of the piston and improves durability.
しかも、ピンボス軸心に近い側の幅広い油溜用
周溝に多量に貯えられた潤滑油をピンボスの軸心
から遠い側の溝幅の狭い油溜用周溝に供給するの
で、ピストンの全周壁を良好に潤滑する。 Moreover, a large amount of lubricating oil stored in the wide oil sump circumferential groove on the side near the pin boss axis is supplied to the narrow oil sump circumferential groove on the side far from the pin boss axis. Good lubrication.
これにより、ピストンとシリングとの摺擦面で
の摩耗が防止され、潤滑性能が良好に保たれるこ
とから、燃焼室からのガス洩れがなく、エンジン
の出力が向上するとともに燃費が向上する。 This prevents wear on the sliding surfaces between the piston and the sill ring, maintains good lubrication performance, and eliminates gas leakage from the combustion chamber, improving engine output and fuel efficiency.
図面は本考案の一実施例を示し、第１図はピス
トンの側面図、第２図は第１図の−線断面
図、第３図は第２図のー線断面図、第４図は
第１図の部の縦断面図であり、第５図は油溜用
周溝の展開図、第６図はピストンの摺動状態を示
す概略側面図である。
１……ピストン、２……筒壁、２ａ……２の左
右両側面部分、２ｂ……２の前後両側面部分、２
ｃ……２の周面、３……ピンボス、８……リング
部、９……トツプランド、１０……スカート、１
１……１０の下部周面、１２……油溜用周溝、１
３……１２の開口部、１４……摺接用突条、Ｃ…
…３の軸心、Ｗ……溝幅、Ｎ……１４の条幅。
The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the piston, FIG. 2 is a cross-sectional view taken along the line -- in FIG. FIG. 5 is a developed view of the oil sump circumferential groove, and FIG. 6 is a schematic side view showing the sliding state of the piston. 1...Piston, 2...Cylinder wall, 2a...Both left and right side parts of 2, 2b...Both front and rear side parts of 2, 2
c...Surrounding surface of 2, 3...Pin boss, 8...Ring part, 9...Totsuprand, 10...Skirt, 1
1... lower circumferential surface of 10, 12... circumferential groove for oil sump, 1
3... 12 openings, 14... sliding contact protrusions, C...
...3 axis center, W...groove width, N...14 strip width.
Claims (1)
部分２ｄに左右一対の各ピンボス３を一体形成
し、筒壁２のリング部８上方のトツプランド９に
多数の油溜用周溝１２を上下多段に刻設し、油溜
用周溝１２に貯えた潤滑油でピストン１とシリン
ダとの摺接面を潤滑するように構成したエンジン
のピストンの外周面潤滑装置において、 上記各油溜用周溝１２の開口部１３の溝幅Ｗを
筒壁２の周面２ｃ上におけるピンボス３の軸心Ｃ
に近い左右両側面部分２ａの方がピンボス３の軸
心Ｃから遠い前後両側面部分２ｂよりも幅広くな
る寸法に形成し、 上記各油溜用周溝１２の開口部１３同士間の摺
接用突条周面の条幅Ｎを筒壁２の周面２ｃ上にお
けるピンボス軸心Ｃに近い左右側面部分２ａより
もピンボス軸心Ｃから遠い前後両側面部分２ｂの
方が幅広くなる寸法に形成した事を特徴するエン
ジンのピストンの外周面潤滑装置。[Claims for Utility Model Registration] A pair of left and right pin bosses 3 are integrally formed on the left and right side wall portions 2d of the intermediate height portion of the cylinder wall 2 of the piston 1, and a large number of pin bosses 3 are formed on the top land 9 above the ring portion 8 of the cylinder wall 2. Lubricating the outer peripheral surface of the piston of an engine, in which oil sump circumferential grooves 12 are carved in multiple stages above and below, and the lubricating oil stored in the oil sump circumferential grooves 12 lubricates the sliding surface between the piston 1 and the cylinder. In the device, the groove width W of the opening 13 of each of the oil sump circumferential grooves 12 is defined as the axis C of the pin boss 3 on the circumferential surface 2c of the cylinder wall 2.
The left and right side surface portions 2a closer to the pin boss 3 are formed to be wider than the front and rear side surface portions 2b farther from the axis C of the pin boss 3, and are used for sliding contact between the openings 13 of each of the oil sump circumferential grooves 12. The width N of the circumferential surface of the protrusion is formed so that the front and rear side surfaces 2b, which are far from the pin boss axis C, are wider than the left and right side surface portions 2a, which are closer to the pin boss axis C, on the circumferential surface 2c of the cylinder wall 2. A lubricating device for the outer circumferential surface of an engine piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8319983U JPS59188952U (en) | 1983-05-31 | 1983-05-31 | Engine piston outer surface lubrication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8319983U JPS59188952U (en) | 1983-05-31 | 1983-05-31 | Engine piston outer surface lubrication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59188952U JPS59188952U (en) | 1984-12-14 |
| JPH0320519Y2 true JPH0320519Y2 (en) | 1991-05-02 |
Family
ID=30213158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8319983U Granted JPS59188952U (en) | 1983-05-31 | 1983-05-31 | Engine piston outer surface lubrication device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59188952U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2510099Y2 (en) * | 1988-03-04 | 1996-09-11 | トヨタ自動車株式会社 | Piston for internal combustion engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234493U (en) * | 1975-09-03 | 1977-03-11 | ||
| JPS5239012A (en) * | 1975-09-18 | 1977-03-26 | Mahle Gmbh | Piston for internal combustion engine |
| JPS5338008U (en) * | 1976-09-08 | 1978-04-03 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5156408U (en) * | 1974-10-30 | 1976-05-01 |
-
1983
- 1983-05-31 JP JP8319983U patent/JPS59188952U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234493U (en) * | 1975-09-03 | 1977-03-11 | ||
| JPS5239012A (en) * | 1975-09-18 | 1977-03-26 | Mahle Gmbh | Piston for internal combustion engine |
| JPS5338008U (en) * | 1976-09-08 | 1978-04-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59188952U (en) | 1984-12-14 |
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