JPH0225966Y2 - - Google Patents
Info
- Publication number
- JPH0225966Y2 JPH0225966Y2 JP1983020584U JP2058483U JPH0225966Y2 JP H0225966 Y2 JPH0225966 Y2 JP H0225966Y2 JP 1983020584 U JP1983020584 U JP 1983020584U JP 2058483 U JP2058483 U JP 2058483U JP H0225966 Y2 JPH0225966 Y2 JP H0225966Y2
- Authority
- JP
- Japan
- Prior art keywords
- annular groove
- eccentric
- packing
- shaft
- annular lip
- 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
- 238000012856 packing Methods 0.000 claims description 24
- YAFQFNOUYXZVPZ-UHFFFAOYSA-N liproxstatin-1 Chemical compound ClC1=CC=CC(CNC=2C3(CCNCC3)NC3=CC=CC=C3N=2)=C1 YAFQFNOUYXZVPZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000007789 sealing Methods 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【考案の詳細な説明】
本考案は、相対的な往復運動をなす２部材の一
方に形成された環溝内に、相対往復運動２部材の
他方の周面と摺動するパツキングを挿入されて２
部材間を密封するピストン構造に関し、更に詳し
くは、相対往復運動中に２部材間に発生する偏心
を吸収し得るピストン構造を提示するものであ
る。[Detailed description of the invention] The present invention has a packing that slides on the circumferential surface of the other of the two members that make relative reciprocating motion, which is inserted into an annular groove formed in one of the two members that make relative reciprocating motion. 2
The present invention relates to a piston structure that seals between members, and more specifically, presents a piston structure that can absorb eccentricity that occurs between two members during relative reciprocating motion.
従来、この種のパツキングは、相対的に往復運
動する物体が偏心した場合の密封機能低下防止対
策として、装着時の圧縮変形量を大きくとつてい
た。第１図は従来のパツキングの装着状態を示す
ものであり、第２図は往復運動する軸２０が偏心
した状態を示すものである。第２図に示すよう
に、往復運動する軸２０が偏心した場合、片寄り
側のパツキング２２の変形量が過大となり、パツ
キング２１の割れや、はみ出しを生ずるという問
題を有していた。 Conventionally, this type of packing has been designed to have a large amount of compressive deformation during installation as a measure to prevent deterioration of the sealing function in the event that objects reciprocating relative to each other become eccentric. FIG. 1 shows the state in which the conventional packing is installed, and FIG. 2 shows the state in which the reciprocating shaft 20 is eccentric. As shown in FIG. 2, when the reciprocating shaft 20 is eccentric, the amount of deformation of the packing 22 on the one side becomes excessive, causing the problem that the packing 21 cracks or protrudes.
本考案は上記問題点に鑑み成されたもので、軸
が偏心してもパツキングが破損することなく、軸
偏心に対し追随性がよく、密封機能の優れたパツ
キングを提供することを目的とする。 The present invention has been developed in view of the above-mentioned problems, and aims to provide a packing that does not damage the packing even if the shaft is eccentric, has a good ability to follow the eccentricity of the shaft, and has an excellent sealing function.
本考案は上記目的を達成するために、以下の構
成を有する。すなわち、互いに同芯に組み合わさ
れて軸方向の相対往復運動をなす２部材の一方に
形成された環状溝内に、前記軸方向の相対往復運
動をなす２部材の他方の周面と密封摺動する偏心
用パツキングを挿入されてなるピストン構造にお
いて、前記環状溝の開口の両側に面取り部を付さ
れ、前記偏心用パツキングが、略円形の断面形状
を呈して前記環状溝の軸方向幅寸法より大なる幅
寸法を備えた外周側の環状リツプ及び内周側の環
状リツプ並びに前記外周側の環状リツプ及び内周
側の環状リツプの軸方向幅寸法より小なる幅寸法
を備えて前記外周側の環状リツプ及び内周側の環
状リツプを連結する連結部分を有し、前記環状溝
の底周面との隙間を前記軸方向の相対往復運動を
なす２部材間の隙間より大きく設定されている構
成となすものである。 In order to achieve the above object, the present invention has the following configuration. That is, in an annular groove formed in one of the two members that are combined concentrically with each other to make a relative reciprocating motion in the axial direction, there is a sealing sliding contact with the circumferential surface of the other of the two members that make a relative reciprocating motion in the axial direction. In the piston structure in which an eccentric packing is inserted, chamfered portions are attached to both sides of the opening of the annular groove, and the eccentric packing has a substantially circular cross-sectional shape and is wider than the axial width dimension of the annular groove. An annular lip on the outer circumferential side and an annular lip on the inner circumferential side with a larger width dimension, and an annular lip on the outer circumferential side with a width dimension smaller than the axial width dimension of the annular lip on the outer circumferential side and an annular lip on the inner circumferential side. A configuration having a connecting portion connecting an annular lip and an annular lip on the inner circumferential side, and a gap between the annular groove and the bottom circumferential surface of the annular groove is set to be larger than a gap between the two members making relative reciprocating motion in the axial direction. This is what is done.
以下、本考案の実施例を図面に基づき説明す
る。 Hereinafter, embodiments of the present invention will be described based on the drawings.
第３図は本考案のパツキングの装着状態を示す
ものであり、軸４に形成された環状溝５内に装着
され、外周側の環状リツプ１の外周６がハウジン
グ１０の内周面９に接触し、内周側の環状リツプ
２の両側面７が環状溝５の側壁側８に接触し、密
封機能を発揮している。軸４の中心軸線とハウジ
ング１０の中心軸線が一致しており、軸４とハウ
ジング１０の内周面９との間には隙間１１ａが形
成され、偏心用パツキング１５の内周側のリツプ
２の内周面と環状溝５の内周面１３との間には隙
間１２ｂが形成されている。この隙間１１と隙間
１２は、以下に示す様な寸法関係になつている。 FIG. 3 shows the packing according to the present invention installed in the annular groove 5 formed in the shaft 4, and the outer circumference 6 of the annular lip 1 on the outer circumferential side is in contact with the inner circumferential surface 9 of the housing 10. However, both side surfaces 7 of the annular lip 2 on the inner peripheral side are in contact with the side wall side 8 of the annular groove 5, and exhibit a sealing function. The central axis of the shaft 4 and the central axis of the housing 10 are aligned, and a gap 11a is formed between the shaft 4 and the inner circumferential surface 9 of the housing 10, and the lip 2 on the inner circumferential side of the eccentric packing 15 is aligned. A gap 12b is formed between the inner circumferential surface and the inner circumferential surface 13 of the annular groove 5. The gap 11 and the gap 12 have a dimensional relationship as shown below.
2a＜2b
環状溝５の両側壁８の開口側に、θ＝15゜〜30゜
に設定された面取り部１４が形成されている。 2a<2b A chamfered portion 14 is formed on the opening side of both side walls 8 of the annular groove 5, and the chamfered portion 14 is set at θ=15° to 30°.
第４図は、軸４が偏心した場合の状態を示すも
ので、軸４が偏心した場合でも、外周側のリツプ
１の外周６がハウジング１０の内周面９と接し、
内周側のリツプの両側面７が環状溝５の側壁８と
接しており、良好な密封作用をしている。軸４及
びハウジング１０間にの偏心ｅが生じた際には、
軸４及びハウジング１０間の隙間a2（＝ａ−ｅ）
と内周側のリツプ２及び環状溝５の底周面１３間
の隙間b2（＝ｂ−ｅ）との間には、下記の関係が
保たれる。 FIG. 4 shows the state when the shaft 4 is eccentric. Even when the shaft 4 is eccentric, the outer periphery 6 of the lip 1 on the outer periphery side is in contact with the inner peripheral surface 9 of the housing 10.
Both side surfaces 7 of the inner lip are in contact with the side walls 8 of the annular groove 5, providing a good sealing effect. When eccentricity e occurs between the shaft 4 and the housing 10,
Gap a2 (= a-e ) between shaft 4 and housing 10
The following relationship is maintained between the lip 2 on the inner peripheral side and the gap b 2 (= be ) between the bottom peripheral surface 13 of the annular groove 5.
Ｏ≦a2＜b2
したがつて、軸４が偏心した場合でも、偏心用
パツキング１５は過度の圧縮応力を受けることが
ない。 O≦a 2 <b 2 Therefore, even if the shaft 4 is eccentric, the eccentric packing 15 will not be subjected to excessive compressive stress.
第５図は他の実施例で、第３図に示した偏心用
パツキングの内部に金属環１６を埋設したもの
で、軸４の偏心に対する環状リツプ１，２の追随
性及び耐圧性を向上する目的で成されたものであ
る。 FIG. 5 shows another embodiment in which a metal ring 16 is embedded inside the eccentric packing shown in FIG. 3, which improves the ability of the annular lips 1 and 2 to follow the eccentricity of the shaft 4 and the pressure resistance. It was done for a purpose.
この偏心用パツキング１７は金属環１６により
変形が制限されるため、分割された環状溝１８内
に装着される。 Since deformation of the eccentric packing 17 is restricted by the metal ring 16, it is installed in the divided annular groove 18.
本考案は上記構成を有する結果、下記の効果を
奏するものである。 As a result of the present invention having the above configuration, it has the following effects.
軸及びハウジング間に偏心が生じた際に、軸
及びハウジング間の隙間a2と、内周側の環状リ
ツプ及び環状溝の底周面間の隙間b2との間に、
Ｏ≦a2＜b2の関係が保たれるように設定されて
いるため、偏心用パツキングに過大な圧縮応力
が作用しない。したがつて、過度の圧縮応力の
作用に起因する割れやはみ出しを生ずることが
なく、長期間に互つて安定した密封機能を発揮
することができる。 When eccentricity occurs between the shaft and the housing, between the gap a 2 between the shaft and the housing and the gap b 2 between the annular lip and the bottom circumferential surface of the annular groove on the inner circumferential side,
Since the setting is such that the relationship O≦a 2 <b 2 is maintained, excessive compressive stress does not act on the eccentric packing. Therefore, cracking or extrusion due to the action of excessive compressive stress does not occur, and a stable sealing function can be exhibited over a long period of time.
軸が偏心した場合でも、軸偏心に対するリツ
プの追随性が向上し、密封接触面が偏心前と同
様に維持される。したがつて、常に安定した密
封圧力が密封接触面に作用することとなり、極
めて密封性能が向上した。 Even when the shaft is eccentric, the lip's ability to follow the eccentricity of the shaft is improved, and the sealing contact surface is maintained in the same way as before eccentricity. Therefore, a stable sealing pressure is always applied to the sealing contact surface, and the sealing performance is greatly improved.
環状溝の両側面の開口側に面取り部を形成さ
れているため、外周側の環状リツプが軸及びハ
ウジング間へはみ出して損傷することが、効果
的に防止される。 Since chamfers are formed on the opening sides of both sides of the annular groove, the annular lip on the outer peripheral side is effectively prevented from protruding between the shaft and the housing and being damaged.
第１図は従来のパツキングの装着状態図、第２
図は軸が偏心した場合のパツキングの状態図、第
３図は本考案の一実施例における偏心用パツキン
グの装着状態図、第４図は軸が偏心した場合の偏
心用パツキングの状態図、第５図は本考案の他の
実施例における偏心用パツキングの装着状態図で
ある。
１……外周側のリツプ、２……内周側のリツ
プ、３……連結部分、４……軸、５……環状溝、
６……外周面、７……側面、８……側壁、９……
内周面、１０……ハウジング、１１……隙間、１
２……隙間、１３……底周面、１４……面取り
部、１５……偏心用パツキング、１６……金属
環、１７……偏心用パツキング、１８……環状
溝。
Figure 1 is a diagram of the installation state of conventional packing, Figure 2
The figure is a state diagram of packing when the shaft is eccentric, Figure 3 is a diagram of the installation state of eccentric packing in an embodiment of the present invention, Figure 4 is a diagram of the state of eccentric packing when the shaft is eccentric, FIG. 5 is a diagram showing how the eccentric packing is installed in another embodiment of the present invention. 1... Lip on the outer circumferential side, 2... Lip on the inner circumferential side, 3... Connecting part, 4... Shaft, 5... Annular groove,
6...Outer peripheral surface, 7...Side surface, 8...Side wall, 9...
Inner peripheral surface, 10...Housing, 11...Gap, 1
2... Gap, 13... Bottom peripheral surface, 14... Chamfered portion, 15... Eccentric packing, 16... Metal ring, 17... Eccentric packing, 18... Annular groove.
Claims (1)
運動をなす軸４及びハウジング１０の一方に形成
された環状溝５内に、前記軸方向の相対往復運動
をなす２部材４，１０の他方の周面と密封摺動す
る偏心用パツキング１７を挿入されてなるピスト
ン構造において、前記環状溝５の開口の両側に面
取り部１４を付され、前記偏心用パツキング１７
が、略円形の断面形状を呈して前記環状溝５の軸
方向幅寸法より大なる幅寸法を備えた外周側の環
状リツプ１及び内周側の環状リツプ２並びに前記
外周側の環状リツプ１及び内周側の環状リツプ２
の軸方向幅寸法より小なる幅寸法を備えて前記外
周側の環状リツプ１及び内周側の環状リツプ２を
連結する連結部分３を有し、前記環状溝５の底周
面１３との隙間（ｂ×２）を前記軸方向の相対往
復運動をなす２部材４，１０間の隙間（ａ×２）
より大きく設定されているピストン構造。 In an annular groove 5 formed in one of the shaft 4 and the housing 10, which are combined concentrically with each other to make a relative reciprocating motion in the axial direction, the other of the two members 4 and 10, which make a relative reciprocating motion in the axial direction, is provided. In a piston structure in which an eccentric packing 17 is inserted that sealsly slides on the surface, chamfered portions 14 are attached to both sides of the opening of the annular groove 5, and the eccentric packing 17
However, the outer annular lip 1 and the inner annular lip 2 have a substantially circular cross-sectional shape and have a width larger than the axial width of the annular groove 5; Annular lip 2 on the inner circumference side
It has a connecting portion 3 which connects the annular lip 1 on the outer circumferential side and the annular lip 2 on the inner circumferential side with a width dimension smaller than the axial width dimension of (b x 2) is the gap (a x 2) between the two members 4 and 10 that make relative reciprocating motion in the axial direction.
Piston structure that is set larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2058483U JPS59125650U (en) | 1983-02-15 | 1983-02-15 | piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2058483U JPS59125650U (en) | 1983-02-15 | 1983-02-15 | piston structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59125650U JPS59125650U (en) | 1984-08-24 |
| JPH0225966Y2 true JPH0225966Y2 (en) | 1990-07-16 |
Family
ID=30151710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2058483U Granted JPS59125650U (en) | 1983-02-15 | 1983-02-15 | piston structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59125650U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5472256U (en) * | 1977-10-31 | 1979-05-23 |
-
1983
- 1983-02-15 JP JP2058483U patent/JPS59125650U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59125650U (en) | 1984-08-24 |
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