CN203906115U - Oil sprayer hole of cylinder cover - Google Patents
Oil sprayer hole of cylinder cover Download PDFInfo
- Publication number
- CN203906115U CN203906115U CN201420369223.0U CN201420369223U CN203906115U CN 203906115 U CN203906115 U CN 203906115U CN 201420369223 U CN201420369223 U CN 201420369223U CN 203906115 U CN203906115 U CN 203906115U
- Authority
- CN
- China
- Prior art keywords
- hole
- oil sprayer
- copper bush
- seal
- fuel injector
- 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.)
- Withdrawn - After Issue
Links
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses an oil sprayer hole of a cylinder cover. An oil sprayer copper bush is installed in the oil sprayer hole, the outer surface of the oil sprayer copper bush forms a multilayer ladder shape from top to bottom, the bottom of the oil sprayer copper bush is of a copper bush seal section, the inner wall of the oil sprayer hole is provided with a step face, threaded holes are formed in the lower part of the step face, and the threaded holes are used for interference fit with the copper bush seal section. According to the oil sprayer hole, by adopting multilayer threaded seal formed by the internal threaded hole of the oil sprayer hole of the cylinder cover and the oil sprayer copper bush, the seal reliability of the oil sprayer copper bush and the oil sprayer hole is improved, and the water leakage phenomenon caused by poor seal of the oil sprayer copper bush is avoided. In addition, the multilayer threaded seal can be realized by simple machining, the processing cost is reduced, and the reliability of an engine is improved simultaneously.
Description
Technical field
The utility model relates to engine art, particularly a kind of oil injector hole of cylinder head.
Background technique
The cylinder head 1 of existing diesel engine is provided with oil injector hole 2, for copper bush of fuel injector 3 is installed.As shown in Figure 1, copper bush of fuel injector 3 is from top to bottom stepped, and its bottom section is reduced diameter section.As shown in Figure 2, the inwall of oil injector hole 2 is provided with step surface 21, and the bottom of step surface 21 is for installing the reduced diameter section of copper bush of fuel injector, and a distance below step surface is provided with oil injector hole annular groove 23.When copper bush of fuel injector is installed, copper bush of fuel injector is put into oil injector hole, and make copper bush of fuel injector compress into oil injector hole annular groove by steel ball, form interference fit, reach seal action.But when press-fiting copper bush of fuel injector, because magnitude of interference is less, copper can not be compressed into the position of oil injector hole annular groove completely, cause having gap between oil injector hole annular groove position oil injector hole and oil injector hole annular groove, poorly sealed, the phenomenon that exists oil injector hole to leak in engine working process, and need work in-process heart processing oil injector hole annular groove, cost is higher.
The information that is disclosed in this background technique part is only intended to increase the understanding to general background of the present utility model, and should not be regarded as admitting or imply that in any form this information structure has been the known prior art of persons skilled in the art.
Model utility content
The purpose of this utility model is to provide a kind of oil injector hole of cylinder head, thereby overcomes the defect that oil injector hole leaks and cost is high of existing engine cylinder cap.
For achieving the above object, the utility model provides a kind of oil injector hole of cylinder head, copper bush of fuel injector is installed in oil injector hole, the outer surface of copper bush of fuel injector is multi-step shape from top to bottom, the bottom of copper bush of fuel injector is copper sheathing seal section, the inwall of oil injector hole is provided with step surface, and the bottom of step surface is tapped hole, and tapped hole is used for and copper sheathing seal section interference fit.
Preferably, in technique scheme, oil injector hole press-fits copper bush of fuel injector by steel ball.
Compared with prior art, the utlity model has following beneficial effect:
The multilayer thread seal that the utility model forms by the interior threaded hole on the oil injector hole of cylinder head and copper bush of fuel injector has improved the reliability of the sealing of copper bush of fuel injector and oil injector hole, avoids the poorly sealed water leakage phenomenon causing of copper bush of fuel injector; And the utility model only needs simple machining can realize multilayer thread seal, has improved the reliability of motor when having reduced processing cost.
Accompanying drawing explanation
Fig. 1 is the structural drawing of copper bush of fuel injector.
Fig. 2 is the oil injector hole of prior art and the assembly structure figure of copper bush of fuel injector.
Fig. 3 is according to the assembly structure figure of oil injector hole of the present utility model and copper bush of fuel injector.
Main description of reference numerals:
1-cylinder head, 2-oil injector hole, 21-step surface, 22-tapped hole, 23-oil injector hole annular groove, 3-copper bush of fuel injector, 31-copper sheathing seal section.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subject to the restriction of embodiment.
Unless separately there is other clearly to represent, otherwise in whole specification and claims, term " comprises " or its conversion was stated being understood to include as " comprising " or " including " etc. element or constituent element, and do not get rid of other element or other constituent element.
As shown in Figure 1, copper bush of fuel injector 3 is from top to bottom stepped, and its bottom section is reduced diameter section, forms copper sheathing seal section 31.
As shown in Figure 3, according to the oil injector hole 2 of the cylinder head of the utility model embodiment, be arranged in cylinder head 1, oil injector hole 2 is provided with step surface 21, and copper bush of fuel injector 3 is positioned in oil injector hole 2, and copper sheathing seal section 31 is arranged on the bottom of step surface 21.
As shown in Figure 3, the bottom of step surface 21 by machining (as, utilize radial drill) mode be processed into tapped hole 22, copper sheathing seal section 31 is interference fit with tapped hole 22, so the copper sheathing seal section of copper bush of fuel injector 3 has certain fill factor with respect to tapped hole 22.When copper bush of fuel injector 3 is installed, copper bush of fuel injector 3 is put into oil injector hole 2, then with steel ball, copper bush of fuel injector 3 is press-fited, a part that press-fits the outer peripheral surface of rear copper sheathing seal section 31 is pressed in the screw thread of tapped hole 22, forms the multi-layer sealed effect that screw thread-like connects.
The multilayer thread seal that the utility model forms by the interior threaded hole on the oil injector hole of cylinder head and copper bush of fuel injector has improved the reliability of the sealing of copper bush of fuel injector and oil injector hole, avoids the poorly sealed water leakage phenomenon causing of copper bush of fuel injector; And the utility model only needs simple machining can realize multilayer thread seal, has improved the reliability of motor when having reduced processing cost.
The aforementioned description to concrete exemplary of the present utility model is for the object with illustration is described.These descriptions not want the utility model to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected and the object described is to explain certain principles of the present utility model and practical application thereof, thereby made those skilled in the art can realize and utilize various exemplary of the present utility model and various selection and change.Scope of the present utility model is intended to be limited by claims and equivalents thereof.
Claims (2)
1. the oil injector hole of a cylinder head, in described oil injector hole, copper bush of fuel injector is installed, the outer surface of copper bush of fuel injector is multi-step shape from top to bottom, the bottom of copper bush of fuel injector is copper sheathing seal section, it is characterized in that, the inwall of described oil injector hole is provided with step surface, and the bottom of described step surface is tapped hole, and described tapped hole is used for and copper sheathing seal section interference fit.
2. the oil injector hole of cylinder head according to claim 1, is characterized in that, described oil injector hole press-fits copper bush of fuel injector by steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420369223.0U CN203906115U (en) | 2014-07-07 | 2014-07-07 | Oil sprayer hole of cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420369223.0U CN203906115U (en) | 2014-07-07 | 2014-07-07 | Oil sprayer hole of cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906115U true CN203906115U (en) | 2014-10-29 |
Family
ID=51780403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420369223.0U Withdrawn - After Issue CN203906115U (en) | 2014-07-07 | 2014-07-07 | Oil sprayer hole of cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074626A (en) * | 2014-07-07 | 2014-10-01 | 广西玉柴机器股份有限公司 | Oil sprayer hole for cylinder cover |
-
2014
- 2014-07-07 CN CN201420369223.0U patent/CN203906115U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074626A (en) * | 2014-07-07 | 2014-10-01 | 广西玉柴机器股份有限公司 | Oil sprayer hole for cylinder cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |