CN205532755U - Diesel engine valve guide - Google Patents
Diesel engine valve guide Download PDFInfo
- Publication number
- CN205532755U CN205532755U CN201620378343.6U CN201620378343U CN205532755U CN 205532755 U CN205532755 U CN 205532755U CN 201620378343 U CN201620378343 U CN 201620378343U CN 205532755 U CN205532755 U CN 205532755U
- Authority
- CN
- China
- Prior art keywords
- connector
- valve guide
- union joint
- diesel engine
- engine valve
- 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 - Fee Related
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Abstract
The utility model discloses a diesel engine valve guide, including the body of straight tube type structure, the body central system has the air vent, and the upper end system of body has the connector, and the external diameter of connector is less than the external diameter of body lies in on the lower extreme of connector is formed with an annular platform, this annular platform with contained angle between the outer wall of connector is the right angle, the periphery of connector is provided with annular cavity, and the lower extreme of annular cavity is provided with the angle of inclination and is 45 inclined plane. The utility model has the advantages of: simple structure, it is through setting up the connector to periphery at the connector is provided with annular cavity, among the the connection process, thereby utilizes the negative pressure that forms to guarantee the leakproofness of junction in the annular cavity, thereby improves the reliability of connecting, also can improve valve guide's life, and the gas tightness of connector root has been guaranteed in orthogonal design between the outer wall through annular platform and connector.
Description
Technical field
This utility model relates to the spare and accessory parts of a kind of Diesel engine, especially a kind of Diesel engine valve guide bushing.
Background technology
Automotive engine valves conduit is parts important on electromotor, is the guider of automotive engine valves, play the guiding role valve, and makes the heat on valve stem pass to cylinder cover through valve guide bushing.
Existing general purpose engine cylinder head is equipped with the valve guide bushing of straight pipe type, but it is poor to there is sealing, the shortcoming that service life is short, in the sealing difference of valve guide bushing is easily caused cylinder head combustor, operating temperature improves, thus cause power to reduce, ultimately result in the reduced lifetime of electromotor.
Summary of the invention
Technical problem to be solved in the utility model is the present situation for prior art, it is provided that a kind of simple in construction, good airproof performance, service life length a kind of Diesel engine valve guide bushing.
The technical scheme that the above-mentioned technical problem of this utility model solution is used is:
A kind of Diesel engine valve guide bushing, body including straight pipe type structure, body central is shaped with passage, the upper end of body is shaped with union joint, the external diameter of union joint is less than the external diameter of described body, the lower end being positioned at described union joint on body is formed with a ring-shaped platform, and the angle between the outer wall of this ring-shaped platform and described union joint is right angle；The periphery of union joint is provided with annular cavity, and the lower end of annular cavity is provided with the inclined-plane that inclination angle is 45 °.
The technical measures optimized also include:
The upper end outer wall cutting of above-mentioned union joint forms first conical surface, and the lower end outer wall cutting of body forms second conical surface.
First cone angle of the first above-mentioned conical surface is 30 °.
Second cone angle of the second above-mentioned conical surface is 15 °.
The diameter of above-mentioned passage is 1:2 to 9:16 with the ratio of the external diameter of described body.
The height of above-mentioned union joint is the 1/3 to 2/5 of the length of described body.
A kind of Diesel engine valve guide bushing of the present utility model, it is shaped with union joint in the upper end of body, and the periphery of union joint is provided with annular cavity, in connection procedure, utilize the interior negative pressure formed of annular cavity thus ensure the sealing of junction, thus improve the reliability of connection, it is also possible to improve the service life of valve guide bushing；It addition, the angle between the ring-shaped platform of the lower end of union joint and the outer wall of union joint is right angle, right-angle structure ensure that the air-tightness of union joint root, it is possible to is further ensured that the reliability of connection.
And the setting on the inclined-plane that inclination angle, annular cavity lower end is 45 °, the discharge of air in annular cavity during being more conducive to assemble.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of this utility model embodiment；
Fig. 2 is I portion enlarged drawing in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
It is structural representation of the present utility model as depicted in figs. 1 and 2,
Reference therein is: highly H, length L, angle a, inclination angle b, the first cone angle c, the second cone angle d, body 1, passage 11, ring-shaped platform 12, union joint 2, annular cavity 21, inclined-plane 21a, first conical surface 31, second conical surface 32.
As depicted in figs. 1 and 2,
A kind of Diesel engine valve guide bushing, body 1 including straight pipe type structure, body 1 center is shaped with passage 11, the upper end of body 1 is shaped with union joint 2, the external diameter of union joint 2 is less than the external diameter of described body 1, the lower end being positioned at described union joint 2 on body 1 is formed with a ring-shaped platform 12, and the angle a between this ring-shaped platform 12 and outer wall of described union joint 2 is right angle；The periphery of union joint 2 is provided with annular cavity 21, and the lower end of annular cavity 21 is provided with the inclined-plane 21a that inclination angle b is 45 °.
In embodiment, the upper end outer wall cutting of union joint 2 forms first conical surface 31, and the lower end outer wall cutting of body 1 forms second conical surface 32.
In embodiment, the first cone angle c of first conical surface 31 is 30 °.
In embodiment, the second cone angle d of second conical surface 32 is 15 °.
The diameter of passage 11 is 1:2 to 9:16 with the ratio of the external diameter of described body 1.
The height H of union joint 2 is the 1/3 to 2/5 of length L of described body 1.
Owing to Diesel engine needs more air inflow than common engine, therefore the diameter of its passage 11 and the external diameter of body 1 is bigger, and in other words, the pipe thickness of its Diesel engine valve guide bushing is relatively thin；In order to ensure the reliability and the service life of valve guide bushing that connect, the biggest between height H and length L of body 1 of union joint 2.In the present embodiment, the external diameter of body 1 is 16mm, a diameter of 9mm of passage 11, and length L of body 1 is 72mm, and the height H of union joint 2 is 24mm.
The material component of body 1 is:
C:1.5% to 2.5%；Cu:2% to 6%；P:0.1% to 1.0%；Sn:0.1% to 1.0%；Remaining element≤1；Surplus is Fe.
This valve guide bushing simple in construction, easy to make, its hardness >=HRB50, density >=6.3g/cm3；Its crushing strength >=450MPa.This valve guide bushing is by being shaped with union joint 2 in the upper end of body 1, and the periphery of union joint 2 is provided with annular cavity 21, in connection procedure, utilize the interior negative pressure formed of annular cavity 21 thus ensure the sealing of junction, thus improve the reliability of connection, it is also possible to improve the service life of valve guide bushing；On body 1, the angle a between the outer wall of ring-shaped platform 12 and union joint 2 is right angle, uses right-angle structure can better ensure that the air-tightness of union joint 2 root, thus is further ensured that the sealing of connection.
It addition, the lower end of annular cavity 21 is provided with the inclined-plane 21a that inclination angle b is 45 °, the setting of this inclined-plane 21a is more beneficial for the discharge of air in annular cavity 21 in connection procedure；And first conical surface 31 and second conical surface 32 are convenient when being disposed to assemble to relevant corresponding parts, it is possible to be effectively improved efficiency of assembling.
In order to ensure product quality, after Product processing completes, remove break corner, burr so that it is smooth surface, to ensure its good sealing, product is carried out narrow examination, it is ensured that it does not exist the defect such as crackle, sand hole simultaneously.
Most preferred embodiment of the present utility model illustrates, those of ordinary skill in the art the various changes made or remodeling are all without departing from scope of the present utility model.
Claims (6)
1. a Diesel engine valve guide bushing, body (1) including straight pipe type structure, described body (1) center is shaped with passage (11), it is characterized in that: the upper end of described body (1) is shaped with union joint (2), the external diameter of described union joint (2) is less than the external diameter of described body (1), the lower end being positioned at described union joint (2) on described body (1) is formed with a ring-shaped platform (12), and the angle (a) between the outer wall of this ring-shaped platform (12) and described union joint (2) is right angle；The periphery of described union joint (2) is provided with annular cavity (21), and the lower end of described annular cavity (21) is provided with the inclined-plane (21a) that inclination angle (b) is 45 °.
A kind of Diesel engine valve guide bushing the most according to claim 1, it is characterized in that: the upper end outer wall cutting of described union joint (2) forms first conical surface (31), the lower end outer wall cutting of described body (1) forms second conical surface (32).
A kind of Diesel engine valve guide bushing the most according to claim 2, is characterized in that: the first cone angle (c) of described first conical surface (31) is 30 °.
A kind of Diesel engine valve guide bushing the most according to claim 3, is characterized in that: the second cone angle (d) of described second conical surface (32) is 15 °.
A kind of Diesel engine valve guide bushing the most according to claim 4, is characterized in that: the diameter of described passage (11) is 1:2 to 9:16 with the ratio of the external diameter of described body (1).
A kind of Diesel engine valve guide bushing the most according to claim 5, is characterized in that: the 1/3 to 2/5 of the length (L) that height (H) is described body (1) of described union joint (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620378343.6U CN205532755U (en) | 2016-04-29 | 2016-04-29 | Diesel engine valve guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620378343.6U CN205532755U (en) | 2016-04-29 | 2016-04-29 | Diesel engine valve guide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205532755U true CN205532755U (en) | 2016-08-31 |
Family
ID=56795183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620378343.6U Expired - Fee Related CN205532755U (en) | 2016-04-29 | 2016-04-29 | Diesel engine valve guide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205532755U (en) |
-
2016
- 2016-04-29 CN CN201620378343.6U patent/CN205532755U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20210429 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |