CN208870664U - Seal valve stem protecting jacket structure - Google Patents
Seal valve stem protecting jacket structure Download PDFInfo
- Publication number
- CN208870664U CN208870664U CN201821635602.4U CN201821635602U CN208870664U CN 208870664 U CN208870664 U CN 208870664U CN 201821635602 U CN201821635602 U CN 201821635602U CN 208870664 U CN208870664 U CN 208870664U
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- Prior art keywords
- valve stem
- valve
- seal
- protective jacket
- protecting jacket
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- Lift Valve (AREA)
Abstract
The utility model discloses a kind of seal valve stem protecting jacket structures.The seal valve stem protecting jacket structure includes: valve comprising: head portion that and valve stem；Valve guide bushing, the valve are threaded through in the valve guide bushing by what its valve stem can move back and forth；Protective jacket, top have taper guide part, and the bottom of the protective jacket offers valve bar jack, and the protective jacket is set in the top of valve stem by valve stem jack；And oil sealing, it is threaded through on the valve stem of valve by the protective jacket, the oil seal lip and valve stem of the oil sealing are interference fitted.The seal valve stem protecting jacket structure installs protective jacket additional on the top of valve stem, avoid when seal valve stem is assembled due to misoperation cause with valve guide bushing it is not coaxial, fill inclined phenomenon seal valve stem caused to leak.
Description
Technical field
The utility model is about engine art, especially with regard to a kind of seal valve stem protecting jacket structure.
Background technique
Since seal valve stem prevents machine oil from entering air inlet-outlet pipe, the mixed gas and discharge exhaust gas of gasoline and air are let out
The effects of leakage and engine motor oil enter combustion chamber, oil seal lip needs to be interference fitted with valve.But gas is assembled on the engine
When door rod oil sealing, seal valve stem may cause formation abrasion, meeting to the sealing station of seal valve stem since manpower is pullled
Occur due to assemble it is improper cause not coaxial with valve guide bushing, filling inclined phenomenon causes seal valve stem to leak, to lose work
With.
The information disclosed in the background technology section is intended only to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition is already known to those of ordinary skill in the art existing
Technology.
Utility model content
The purpose of this utility model is to provide a kind of simple and reasonable seal valve stem protecting jacket structure, the valves
Bar oil sealing protecting jacket structure installs protective jacket additional on the top of valve stem, avoids when seal valve stem is assembled since misoperation is drawn
Rise with valve guide bushing it is not coaxial, fill inclined phenomenon seal valve stem caused to leak.
To achieve the above object, the utility model provides a kind of seal valve stem protecting jacket structure, comprising: valve,
It include: head portion that and valve stem；Valve guide bushing, the valve are threaded through the gas by what its valve stem can move back and forth
In door conduit；Protective jacket, top have taper guide part, and the bottom of the protective jacket offers valve bar jack, the protection
Set is set in the top of valve stem by valve stem jack；And oil sealing, the valve of valve is threaded through by the protective jacket
On bar, the oil seal lip and valve stem of the oil sealing are interference fitted.
In a preferred embodiment, valve stem is in cylindrical type.
In a preferred embodiment, the shape of head portion that is flat-top, spherical surface top or loudspeaker top.
In a preferred embodiment, the diameter of taper guide part top is smaller than the diameter of the oil seal lip of oil sealing.
In a preferred embodiment, protective jacket and matching for valve stem are combined into clearance fit.
Compared with prior art, seal valve stem protecting jacket structure according to the present utility model has the following beneficial effects:
The seal valve stem protecting jacket structure installs protective jacket additional on the top of valve stem, avoids when seal valve stem is assembled due to operation
It is improper to cause and valve guide bushing is coaxial, the part failure situation that fills inclined phenomenon seal valve stem is caused to leak, and generate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the seal valve stem protecting jacket structure of one embodiment of the utility model.
Fig. 2 is illustrated according to the protecting jacket structure of the seal valve stem protecting jacket structure of one embodiment of the utility model
Figure.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail, it is to be understood that this is practical
Novel protection scope is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, according to the specific structure of the seal valve stem protecting jacket structure of the preferred embodiments of the present invention
It include: valve 1, valve guide bushing 2, oil sealing 3 and protective jacket 4.Wherein, protective jacket 4 is installed at the valve stem top of valve 1, avoids
When valve stem and oil sealing 3 are assembled due to misoperation cause with valve guide bushing 2 it is not coaxial, fill inclined phenomenon and lead to valve stem oil
Envelope leakage, and the part failure situation generated.
Specifically, the effect of valve 1 is to be responsible for input air and the exhaust gas being discharged after burning into engine specially.From
On engine structure, it is divided into inlet valve (intake valve) and exhaust valve (exhaust valve).The effect of inlet valve be by
Air sucks in engine, is mixed and burned with fuel；The effect of exhaust valve is that the exhaust gas after burning is discharged and is radiated.Valve is
It is made of head portion that and bar portion.Head portion that temperature is very high (570~670K of inlet valve, 1050~1200K of exhaust valve), and
Also subject to the pressure of gas, the active force of valve spring and transmission component inertia force, lubrication, cooling condition are poor, it is desirable that valve
Must there are some strength, rigidity, heat-resisting and wear-resisting property.Inlet valve generally uses steel alloy (chromium steel, nickel-chromium steel), and exhaust valve is adopted
With heat-resisting alloy (silichrome steel).Sometimes for saving heat-resisting alloy, exhaust valve head heat-resisting alloy, and bar portion chromium steel, then
The two is welded.The shape of head portion that has flat-top, spherical surface top and loudspeaker top etc..Usually using flat-top.Flat-top gas
Door head construction is simple, easily manufactured, endotherm area is small, quality is smaller, inlet and exhaust valve can use.Spherical surface top gas door is applicable in
In exhaust valve, intensity is high, exhaust resistance is small, exhaust gas eradicating efficacy is good, but its heating surface area is big, and quality and inertia are big, process
It is complicated.Trumpet type has certain streamlined, can reduce intake resistance, but its head heating surface area is big, is only suitable for inlet valve.Valve
Cone angle is the angle of sealing surface of air valve, and usually 45 °, some are 30 ° (6102 h type engine hs of CA1091 automobile).30 ° of gas
Door is considered in the identical situation of lift, and valve taper is small, and valve is big by end face, and intake resistance is small, but since taper is small
Head portion that edge is relatively thin, and rigidity is small, and leakproofness and poor thermal conductivity are generally used for inlet valve.The thickness at valve edge is generally 1
~3mm is damaged with preventing from impacting in work with valve seating or is burnt out by high temperature.In order to reduce intake resistance, improve cylinder into
Gas efficiency, most engine intake valves are bigger than exhaust valve.Used inlet valve and exhaust valve color are also different.
Valve stem is in cylindrical type, and valve 1 is threaded through in valve guide bushing 2 by its valve stem, in valve guide bushing constantly into
Row moves back and forth, the necessary Overheating Treatment in surface and polishing.The shape of valve end depends on the fixed form of valve spring,
Common structure is that two halves locking plate carrys out fixed spring seat, and there is annular groove in the end of valve stem to install locking plate, have plenty of with lock pin come
Fixed, there is the hole of an installation lock pin in end.
As shown in Fig. 2, the top of protective jacket 4 has taper guide part, the diameter of the taper guide part top is than oil sealing 3
Oil seal lip diameter it is small, the bottom of protective jacket 4 offers valve bar jack, and protective jacket 4 is set in by valve stem jack
The top of valve stem.
Preferably, protective jacket 4 and matching for valve stem are combined into clearance fit, can be convenient and efficiently load and unload.It is easy to carry.
Preferably, protective jacket 4 is steel material.
Preferably, protective jacket 4 is carbon steel.
Oil sealing 3 is threaded through on the valve stem of valve 1, and the oil seal lip and valve stem of oil sealing 3 are interference fitted, and having prevents machine
Oil enters air inlet-outlet pipe, and the mixed gas and discharge exhaust gas leakage and engine motor oil of gasoline and air enter the work such as combustion chamber
With when assembling oil sealing on engine air valve rod, oil sealing 3 is pressed into the valve stem of valve 1 by protective jacket 4, with valve stem interference
Cooperation is avoided when valve stem and oil sealing 3 are assembled since the top of protective jacket 4 has taper guide part since misoperation is drawn
Rise with valve guide bushing 2 it is not coaxial, fill inclined phenomenon seal valve stem caused to leak, and the part failure situation of generation.And it drops
Low assembly tooling requirement, when especially after-sales service is without special installation apparatus.
To sum up, which installs protective jacket additional on the top of valve stem, avoids in seal valve stem
When assembly due to misoperation cause with valve guide bushing it is not coaxial, fill inclined phenomenon seal valve stem caused to leak, and generate
Part failure situation.
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can be realized and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shapes
Formula is limited.
Claims (5)
1. a kind of seal valve stem protecting jacket structure characterized by comprising
Valve comprising: head portion that and valve stem；
Valve guide bushing, the valve are threaded through in the valve guide bushing by what its valve stem can move back and forth；
Protective jacket, top have taper guide part, and the bottom of the protective jacket offers valve bar jack, and the protective jacket passes through
Valve stem jack is set in the top of valve stem；And
Oil sealing is threaded through on the valve stem of valve by the protective jacket, and oil seal lip and the valve stem interference of the oil sealing are matched
It closes.
2. seal valve stem protecting jacket structure as described in claim 1, which is characterized in that the valve stem is in cylindrical type.
3. seal valve stem protecting jacket structure as claimed in claim 2, which is characterized in that the shape of the head portion that is flat
Top, spherical surface top or loudspeaker top.
4. seal valve stem protecting jacket structure as described in claim 1, which is characterized in that the taper guide part top
Diameter is smaller than the diameter of the oil seal lip of oil sealing.
5. seal valve stem protecting jacket structure as claimed in claim 4, which is characterized in that the protective jacket and valve stem are matched
It is combined into clearance fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635602.4U CN208870664U (en) | 2018-10-09 | 2018-10-09 | Seal valve stem protecting jacket structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635602.4U CN208870664U (en) | 2018-10-09 | 2018-10-09 | Seal valve stem protecting jacket structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208870664U true CN208870664U (en) | 2019-05-17 |
Family
ID=66469694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821635602.4U Active CN208870664U (en) | 2018-10-09 | 2018-10-09 | Seal valve stem protecting jacket structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208870664U (en) |
-
2018
- 2018-10-09 CN CN201821635602.4U patent/CN208870664U/en active Active
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