CN103410638A - High-pressure oil pipe for diesel engine - Google Patents
High-pressure oil pipe for diesel engine Download PDFInfo
- Publication number
- CN103410638A CN103410638A CN2013103307375A CN201310330737A CN103410638A CN 103410638 A CN103410638 A CN 103410638A CN 2013103307375 A CN2013103307375 A CN 2013103307375A CN 201310330737 A CN201310330737 A CN 201310330737A CN 103410638 A CN103410638 A CN 103410638A
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- oil pipe
- diesel engine
- pressure oil
- attaching nut
- cambered surface
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Abstract
The invention discloses a high-pressure oil pipe for a diesel engine. The high-pressure oil pipe only comprises an oil pipe body and a connecting nut. The connecting nut is located at one end of the oil pipe and sleeved outside the oil pipe. A pier head is disposed at one end of the connecting nut and provided with an arc face. The pier head is hermetically connected with the connecting nut through the arc face. The high pressure oil pipe has the advantages that the structure is simplified due to the fact that the oil pipe comprises only the oil pipe body and the connecting nut; the oil pipe body is directly and hermetically connected with the connecting nut, and reliability of the high-pressure oil pipe can be increased greatly; production and machining difficulty of the high-pressure oil pipe is lowered evidently by simplifying the structure and optimizing hermetical connection, and quality of the high-pressure oil pipe is guaranteed favorably; connection between the high-pressure oil pipe and the diesel engine is enhanced, and the high-pressure oil pipe is more tightly connected with the diesel engine.
Description
Technical field
The present invention relates to a kind of diesel engine high-pressure fuel conduit.
Background technique
While due to diesel engine, working, the pressure of oil-fired system is high, generally in the 180MPa left and right, therefore the sealability between all parts of oil feed line is extremely important, and especially the sealability of diesel engine high-pressure oil pipe directly has influence on the working state of diesel engine.Existing diesel engine high-pressure fuel conduit all comprises oil pipe and the attaching nut of metal material.As shown in Figure 1, 2, two attaching nuts 3 are installed on oil pipe 1, in the middle of the attaching nut, are provided with tapped hole, therefore the attaching nut is enclosed within the oil pipe outside.The two ends of oil pipe form two pier noses by cold heading technique, and the excessive position between pier nose and oil pipe main body is the arc of indent.Attaching nut's inwall is the convex character shape structure, the excessive structure therefore do not relaxed between the face on two different direction.During use, the attaching nut is connected with the screw socket on diesel engine by the tapped hole of self, after connecting, the pier nose position of oil pipe closely is connected with diesel engine, and must be connected by sheath 2 between attaching nut and pier nose, sheath 2 is ring structure, one end inboard is provided with the cambered surface of corresponding pier nose arc concave inward structure, and an end is provided with corresponding attaching nut's toroidal surface.After connecting, form the relation that is tightly connected between pier nose and sheath, between sheath and attaching nut, form the relation that is tightly connected.So, between diesel engine and high-pressure oil pipe, form the relation that is tightly connected.
To add the man-hour technology difficulty large due to the structure of sheath, and must increase the oil pipe two ends form after cold heading technique special-shaped dimensions length while with sheath, reaching sealing effect; When bending, need special-purpose mould, this has increased the difficulty of processing of pier nose greatly, and the versatility that product adds man-hour reduces.
The product had all comprises three parts, and sheath must be arranged on oil pipe with the attaching nut before pier nose processing, makes like this that at pier nose, to add the difficulty in man-hour larger, and many parts can reduce the reliability of whole product.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of simple in structure, connect the diesel engine high-pressure fuel conduit reliable, that sealability is strong.
For solving the problems of the technologies described above, the present invention adopts following technological scheme: diesel engine high-pressure fuel conduit includes only oil pipe and attaching nut, an end and attaching nut that described attaching nut is positioned at oil pipe are enclosed within the oil pipe outside, described attaching nut's one end is provided with pier nose, described pier nose is provided with cambered surface, described pier nose forms and is tightly connected by cambered surface and attaching nut, and described pier nose is provided with cambered surface with the diesel engine joint, being connected this end.
In this technological scheme, the pier nose surface is provided with sealing configuration, just can form the relation be tightly connected after making pier nose and the attaching nut contacting, thereby has saved sheath component of the prior art.Being tightly connected of forming between cambered surface on pier nose and attaching nut is the annexation of linear sealing at least.When pier nose is connected with diesel engine, the joint of diesel engine is connected with an end of pier nose, and this end arranges cambered surface, with this, go back the annexation between Optimization of Diesel Engine high-pressure oil pipe and diesel engine, make pier nose and diesel engine joint take to be tightly connected at least the annexation as linear sealing
For strengthening the relation that is tightly connected between pier nose and attaching nut, as of the present invention preferred, described attaching nut is provided with cambered surface, and the cambered surface on described cambered surface and pier nose is coincide, and the cambered surface on described attaching nut and the cambered surface on pier nose form and are tightly connected by the face Placement.So greatly increased the sealability between pier nose and attaching nut.
The present invention adopts technique scheme: diesel engine high-pressure fuel conduit only has oil pipe and two parts of attaching nut, and structure is simplified; By between oil pipe and attaching nut, directly forming the relation of being tightly connected, can greatly improve the reliability of diesel engine high-pressure fuel conduit.This diesel engine high-pressure fuel conduit, by simplified structure, is optimized the design that is tightly connected, and impels the difficulty of production processing obviously to descend, and this is conducive to guarantee product quality.Simultaneously, strengthened the annexation between diesel engine high-pressure fuel conduit and diesel engine, make between diesel engine high-pressure fuel conduit and diesel engine, be connected tightr.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.
Fig. 1 is the structural representation of diesel engine high-pressure fuel conduit in prior art;
Fig. 2 is the structural representation of another kind of diesel engine high-pressure fuel conduit in prior art;
Fig. 3 is the structural representation of a kind of diesel engine high-pressure fuel conduit of the present invention.
Embodiment
As shown in Figure 3, this diesel engine high-pressure fuel conduit 4 includes only oil pipe 4 and attaching nut 4.The tapped hole that on oil pipe 4, cover has 4, two attaching nuts 4 of two attaching nuts is respectively towards the two ends of oil pipe 4.Every end of oil pipe 4 all is provided with pier nose, and this pier nose is provided with cambered surface 6 in the one side towards oil pipe 4 neutral positions; Attaching nut 4 tapped hole place is provided with cambered surface 7, and this cambered surface 7 is coincide with the cambered surface 6 at pier nose place.During use, oil pipe 4 is fixedly connected on diesel engine by attaching nut 4, be thus connected nut 4 and closely be connected with the pier nose of oil pipe 4, and the cambered surface on attaching nut 47 forms and is tightly connected by the face Placement with the cambered surface 6 on pier nose.Such Placement has remarkable advantage simple in structure, that sealability is strong.Because pier nose is provided with cambered surface 8 at this end along oil pipe 4 outward extending directions, and the joint on diesel engine is provided with cambered surface that should cambered surface, and the mode connected with face between pier nose and joint after therefore connecting is sealed connected together.
Claims (2)
1. a diesel engine high-pressure fuel conduit (4), it is characterized in that: it includes only oil pipe (4) and attaching nut (4), an end and attaching nut (4) that described attaching nut (4) is positioned at oil pipe (4) are enclosed within oil pipe (4) outside, described attaching nut's (4) one ends are provided with pier nose, described pier nose is provided with cambered surface (6), described pier nose forms and is tightly connected by cambered surface (6) and attaching nut (4), and described pier nose is provided with cambered surface with the diesel engine joint, being connected this end.
2. diesel engine high-pressure fuel conduit (4) according to claim 1, it is characterized in that: described attaching nut (4) is provided with cambered surface (7), described cambered surface (7) is coincide with the cambered surface (6) on pier nose, and the cambered surface (7) on described attaching nut (4) forms and is tightly connected by the face Placement with the cambered surface (6) on pier nose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103307375A CN103410638A (en) | 2013-07-31 | 2013-07-31 | High-pressure oil pipe for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103307375A CN103410638A (en) | 2013-07-31 | 2013-07-31 | High-pressure oil pipe for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103410638A true CN103410638A (en) | 2013-11-27 |
Family
ID=49603671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103307375A Pending CN103410638A (en) | 2013-07-31 | 2013-07-31 | High-pressure oil pipe for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103410638A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909887A (en) * | 2016-05-25 | 2016-08-31 | 临海市澳法管业有限公司 | Cold upsetting supercharger conical surface molding oil pipe joint and cold upsetting manufacturing process thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4665876A (en) * | 1984-06-07 | 1987-05-19 | Usui Kokusai Sangyo Kabushiki Kaisha | Connector head construction for high-pressure fuel injection tubes |
| CN2573707Y (en) * | 2002-10-18 | 2003-09-17 | 山东巨菱股份有限公司 | High-pressure oil pipe sealing device for single-cylinder diesel engine |
| JP2004019541A (en) * | 2002-06-17 | 2004-01-22 | Denso Corp | High-pressure fuel injection pipe |
| CN101260855A (en) * | 2004-06-17 | 2008-09-10 | 臼井国际产业株式会社 | Manifold connecting structure in fuel rail of internal combustion engine, manifold and manufacturing method thereof |
| JP2009150272A (en) * | 2007-12-19 | 2009-07-09 | Nippon Steel Corp | Common rail |
| WO2010119896A1 (en) * | 2009-04-15 | 2010-10-21 | 臼井国際産業株式会社 | Fuel injection tube for diesel engine |
| CN202883195U (en) * | 2012-10-22 | 2013-04-17 | 玉环县坎门机械厂 | Connecting structure of high-pressure oil pipe |
| CN203383955U (en) * | 2013-07-31 | 2014-01-08 | 杭州奥加汽车零部件制造有限公司 | Diesel engine high-pressure oil pipe |
-
2013
- 2013-07-31 CN CN2013103307375A patent/CN103410638A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4665876A (en) * | 1984-06-07 | 1987-05-19 | Usui Kokusai Sangyo Kabushiki Kaisha | Connector head construction for high-pressure fuel injection tubes |
| JP2004019541A (en) * | 2002-06-17 | 2004-01-22 | Denso Corp | High-pressure fuel injection pipe |
| CN2573707Y (en) * | 2002-10-18 | 2003-09-17 | 山东巨菱股份有限公司 | High-pressure oil pipe sealing device for single-cylinder diesel engine |
| CN101260855A (en) * | 2004-06-17 | 2008-09-10 | 臼井国际产业株式会社 | Manifold connecting structure in fuel rail of internal combustion engine, manifold and manufacturing method thereof |
| JP2009150272A (en) * | 2007-12-19 | 2009-07-09 | Nippon Steel Corp | Common rail |
| WO2010119896A1 (en) * | 2009-04-15 | 2010-10-21 | 臼井国際産業株式会社 | Fuel injection tube for diesel engine |
| CN202883195U (en) * | 2012-10-22 | 2013-04-17 | 玉环县坎门机械厂 | Connecting structure of high-pressure oil pipe |
| CN203383955U (en) * | 2013-07-31 | 2014-01-08 | 杭州奥加汽车零部件制造有限公司 | Diesel engine high-pressure oil pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909887A (en) * | 2016-05-25 | 2016-08-31 | 临海市澳法管业有限公司 | Cold upsetting supercharger conical surface molding oil pipe joint and cold upsetting manufacturing process thereof |
| CN105909887B (en) * | 2016-05-25 | 2018-11-13 | 临海市澳法管业有限公司 | A kind of cold-heading booster conical surface molding oil connection and its cold-heading manufacturing process |
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Application publication date: 20131127 |