CN204002967U - Valve oil seal - Google Patents
Valve oil seal Download PDFInfo
- Publication number
- CN204002967U CN204002967U CN201420443768.1U CN201420443768U CN204002967U CN 204002967 U CN204002967 U CN 204002967U CN 201420443768 U CN201420443768 U CN 201420443768U CN 204002967 U CN204002967 U CN 204002967U
- Authority
- CN
- China
- Prior art keywords
- valve
- jut
- oil seal
- guide bushing
- low
- 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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- Sealing With Elastic Sealing Lips (AREA)
Abstract
The utility model provides a kind of valve oil seal, prevents from, at the superfluous stress producing with the matching part of this valve stem, can preventing the abnormal of installment state, and can preventing loosening and come off when it is installed on valve stem.The sealed department (20) that valve oil seal (1) has the holding part (10) of the roughly tubular that is installed on valve stem (50) and formed by metallic material and is linked to this holding part, formed by elastomer.Sealed department (20) has and is integrally formed and covers the inner peripheral surface (11a) of cylindrical portion (11) with sealing lip (21) and configure, and the engagement portion (22) engaging with the outer circumferential face of valve guide bushing (40).Engagement portion (22) has outstanding to radially inner side and has a low jut (23) at the low back side (23a), further outstanding to radially inner side and have high jut (24) that the high back side (24a) the more close inlet side of lower jut arrange, be arranged on the stepped part (25) between low jut (23) and high jut (24) from this low jut.
Description
Technical field
The utility model relates to the valve oil seal for internal-combustion engine, the valve oil seal particularly using in the engine valve of the internal-combustion engine of automobile or general industrial machine.
Background technique
In the past, the performance of the valve oil seal of internal-combustion engine prevented from the effect of leakage of oil between valve stem and valve guide bushing.On the other hand, in order to prevent, at valve stem and valve guide bushing, excessive wearing and tearing occur, need to supply with appropriate oil to the slide part of valve stem and valve guide bushing, lubricated valve stem.For the valve oil seal that meets this requirement is provided, various trials are carried out in recent years.
For example, as shown in Figure 4, valve oil seal 100 in the past has: the tubular base portion 120 that is arranged on the periphery of valve guide bushing 110; Extend and exist, also can connect airtight slidably in sealing lip 130 and the back pressure lip 140 of the outer circumferential face of valve stem 114 from the upper end portion of this tubular base portion; For the reinforcement sleeve 150 that they are kept.
Tubular base portion 120, sealing lip 130 form by rubber-like elastic part each other continuously with back pressure lip 140, and the metal system of being engaged in that cures is strengthened sleeve 150.
Be provided with carrying ridge 121 at the inner peripheral surface of tubular base portion 120 and engage ridge 122 with multiple.Engaging ridge 122 is connected via paddy portion 123 each other with carrying ridge 121.In addition, engaging ridge 122 forms with essentially identical height with carrying ridge 121.The outer circumferential face of valve guide bushing 110 is formed with each and engages multiple engagement grooves 111 that ridge 122 engages.
In this valve oil seal 100, carry ridge 121 by formation, tubular base portion 120 is carried on the outer circumferential face of valve guide bushing 110.In addition, by engagement groove 111 and the engaging that engages ridge 122, suppress valve oil seal 100 and come off from valve guide bushing 110.
The valve oil seal 200 of Fig. 5 has the lip of not shown valve stem seal 210.Lip 210 is made up of oily lip (oil lip) 220 and secondary lip (double lip) 230.
Be provided with the groove 240 that leads to oily A side from entrance (port) B side at the inner peripheral surface of lips 230, groove 240 forms the large shape of width of the groove of little, the oily A side of width of the groove of entrance B side.Thus, by lips 230 in the different groove 240 of axial formation width, adjust a certain amount of leakage of oil, its result, prevents the adhesion of valve stem and valve guide bushing.In addition, below lip 210, be formed with and projecting strip part 250 and the slot part 260 of the outer circumferential face butt of valve guide bushing.
Model utility content
The problem that model utility will solve
But, when the valve oil seal in the past shown in Fig. 4 is arranged on to the outer circumferential face of valve guide bushing, because the engagement protrusion being made up of rubber-like elasticity material produces larger distortional stress, so this engagement protrusion is fixed under the state of excessive deformation sometimes.In addition, in order to improve coordinate force, if increase the height of engagement protrusion, this tendency obviously occurs.The installment state of engagement protrusion produces when abnormal, likely causes on the contrary the coordinate force producing between engagement protrusion and valve guide bushing to reduce, thus cannot be by the height setting of engagement protrusion for higher, and coordinate force raising is limited.
In addition, in as shown in Figure 5 other valve oil seal in the past, only disclose the projecting strip part of the outer circumferential face butt of setting and valve guide bushing, the concrete effect that projecting strip part brings has not openly been set, also produced problem same as described above.
The purpose of this utility model is to provide a kind of valve oil seal, and it prevents that the position coordinating with this valve guide bushing in the time being installed to valve guide bushing from producing superfluous stress, can prevent the abnormal of installment state, and can prevent loosening or come off.
To achieve these goals, the utility model relates to a kind of valve oil seal, it is installed on valve stem, and have: the holding part of the roughly tubular being formed by metallic material and the sealed department that links and formed by elastomer with this holding part, described holding part has the cylindrical portion of surrounding the outer circumferential face of valve guide bushing and configure and is arranged on the lip part of this cylindrical portion upper end, described sealed department has with the sealing lip of the outer circumferential face butt of described valve stem and is integrally formed and covers the inner peripheral surface of described cylindrical portion with sealing lip and configure, and the engagement portion engaging with the outer circumferential face of described valve guide bushing, described engagement portion has: low jut from the low back side to radially inner side that give prominence to and have, from this low jut further outstanding to radially inner side and there is the high back side, more close inlet side arranges compared with described low jut high jut, be arranged on the stepped part between described low jut and described high jut.
In addition, the outer circumferential face of the described low back side and described valve guide bushing arranges substantially in parallel.
Described stepped part has the plane of inclination that links the described low back side and the described high back side.
Described valve guide bushing has: to the outstanding diameter reducing part of radial outside; From this diameter reducing part further to the outstanding wide diameter portion of radial outside; Be arranged on other stepped part between described diameter reducing part and described wide diameter portion, the low jut compressed fit of described engagement portion is at the described wide diameter portion of described valve guide bushing, and the described stepped part of described engagement portion is described other stepped part at described valve guide bushing by engagement.
In addition, described sealed department preferably have form in one end of described sealing lip and slidably with the back pressure lip of the outer circumferential face butt of described valve stem.
The effect of model utility
According to the utility model, the engagement portion of the sealed department engaging with valve guide bushing has following member: the low jut with the low back side; Give prominence to and there is the high back side than this low jut, the high jut that more close inlet side arranges compared with described low jut; The stepped part arranging between low jut and high jut.Thus, while being installed on valve guide bushing, can make the low jut appropriateness resiliently deformable as the position coordinating with valve guide bushing, thus this low jut compressed valve guide bushing that is matched with under appropriate distortional stress.Its result, can prevent from producing superfluous stress at low jut, and can prevent the abnormal of installment state.In addition, by stepped part being set between low jut and high jut, this stepped part is reliably by valve guide bushing engagement.Therefore, can not make coordinate force excessively increase, can easily valve oil seal be installed on to valve guide bushing, and can prevent that loosening, the valve oil seal of valve oil seal from coming off from valve guide bushing.Even if be subject to from outside vibrations after installation etc., also can prevent for a long time that valve oil seal is loosening or come off.
Axially arranging substantially in parallel of the low back side and valve guide bushing, so while being installed on valve guide bushing, the compression joint area of the low back side of low jut and the outer circumferential face of valve guide bushing increases, can be suppressed at the inequality of compressive stress direction in face of low jut generation.
And stepped part has the plane of inclination that links the Yu Gao back side, the low back side.Thus, valve oil seal easily can be installed on to valve guide bushing.
In addition, diameter reducing part that valve guide bushing has wide diameter portion, form at the inlet side of this wide diameter portion, be arranged on other stepped part between wide diameter portion and diameter reducing part, the low jut compressed fit of engagement portion is in the wide diameter portion of valve guide bushing, and the stepped part of engagement portion is other stepped part at valve guide bushing by engagement.; make the low jut of valve oil seal as compressed fit portion performance function, meanwhile, make the stepped part of valve oil seal bring into play function as hooking part; by the position of function of above-mentioned performance compressed fit and engagement is individually set, can prevents reliably that valve oil seal is loosening or come off.
Brief description of the drawings
Fig. 1 is the longitudinal section that schematically represents the formation of the valve oil seal of embodiment of the present utility model.
Fig. 2 is the longitudinal section that the valve oil seal of presentation graphs 1 is installed in the state of valve guide bushing.
Fig. 3 is the high jut of Fig. 2 and the enlarged view of low jut.
Fig. 4 is the longitudinal section that represents the formation of valve oil seal in the past.
Fig. 5 is the longitudinal section that represents the formation of other valve oil seals in the past.
Symbol description
1 valve oil seal
10 holding parts
11 cylindrical portion
11a inner peripheral surface
12 lip parts
20 sealed departments
21 sealing lips
21a primary seal lip
The secondary sealing lip of 21b
22 engagement portions
23 low juts
The low back side of 23a
24 high juts
The high back side of 24a
25 stepped part
25a surface
26 back side lips
30 garter springs
40 valve guide bushings
41 diameter reducing parts
41a outer circumferential face
42 wide diameter portions
42a outer circumferential face
43 stepped part
43a tabular surface
44 bights
45 gaps
50 valve stems
50a outer circumferential face
Embodiment
Below, describe mode of execution of the present utility model in detail with reference to accompanying drawing.
Fig. 1 is the longitudinal section that schematically represents the formation of the valve oil seal of mode of execution of the present utility model.This valve oil seal, for the engine valve of the internal-combustion engine of internal-combustion engine, particularly automobile or general industry apparatus, is installed on valve stem in case the leakage of oil between air-stop gate bar and valve guide bushing.Should illustrate, the valve oil seal of Fig. 1 represents one example, and the formation of valve oil seal of the present utility model is not limited to the scheme shown in Fig. 1.
The sealed department 20 that valve oil seal 1 has the holding part 10 of the roughly tubular being formed by metallic material and links, formed by elastomer with this holding part.Valve oil seal 1 is the parts of tubular roughly, when valve stem 50 (Fig. 2) is inserted through in its tubular space, and under the effect of the elastic force of garter spring 30, the interior perimembranous of sealed department 20 and the outer circumferential face butt of valve stem.
Holding part 10 have with valve stem 50 roughly arranged coaxial cylindrical portion 11, be arranged on the lip part 12 of the upper end of this cylindrical portion, the radially longitudinal section of holding part is L font roughly.Sealed department 20 cures and is bonded in this holding part 10, and holding part 10 is engaged with sealed department 20.
Sealed department 20 have can be slidably with the sealing lip 21 of the outer circumferential face 50a butt of valve stem 50, be fastened on and the roughly engagement portion 22 of the outer circumferential face of the valve guide bushing of arranged coaxial of this valve stem, and described sealing lip and engagement portion are by integrally formed.Garter spring 30 is engaged in the outer circumferential face of sealing lip 21, utilizes this garter spring 30 to adjust the oil mass of supplying with via sealing lip 21.
The radially longitudinal section of sealing lip 21 is V font roughly, and its top can be connected to the outer circumferential face 50a of valve stem 50 slidably.Sealing lip 21 have with the primary seal lip 21a of the outer circumferential face 50a crimping of valve stem 50 be more close to inlet side configuration and the secondary sealing lip 21b with the outer circumferential face 50a butt of valve stem 50 compared with this primary seal lip.
Sealed department 20 has the back pressure lip 26 that more secondary sealing lip 21b is more close to inlet side formation and is connected to slidably the outer circumferential face 50a of valve stem 50.The back pressure from inlet side that this back pressure lip 26 produces while blocking work, thus make this back pressure not put on sealing lip 21 via the gap between valve stem 50 and valve guide bushing 40.
Engagement portion 22 is configured in the mode of the inner peripheral surface 11a of covering cylindrical portion 11.Particularly, engagement portion 22 has: low jut 23 from low back side 23a to radially inner side that give prominence to and have; Further outstanding to radially inner side and there is high back side 24a from low jut 23, at the high jut 24 of the more close inlet side setting of axial lower jut 23 of cylindrical portion 11; Be arranged on the stepped part 25 between low jut 23 and high jut 24.In addition, low jut 23 and high jut 24 are integrally formed in the mode that paddy portion is not set between them.Thus, the low back side 23a compressed fit of low jut 23 is in the outer circumferential face of following valve guide bushing, and stepped part 25 is limited to the stepped part of following valve guide bushing.
Fig. 2 is the longitudinal section that the valve oil seal 1 of presentation graphs 1 is installed in the state of valve guide bushing.In Fig. 2, as an example of valve guide bushing, be illustrated in the formation that inlet side is provided with diameter reducing part, is provided with at an upper portion thereof wide diameter portion.
As shown in Figure 2, valve guide bushing 40 there is the diameter reducing part 41 outstanding to radial outside, from diameter reducing part 41 further to the outstanding wide diameter portion 42 of radial outside, be arranged at the stepped part 43 between diameter reducing part 41 and wide diameter portion 42.In the time that this valve guide bushing 40 is installed valve oil seal 1, the low jut 23 of engagement portion 22 is matched with the wide diameter portion 42 of valve guide bushing 40 in the effect lower compression of appropriate coordinate force.Now, the low back side 23a entirety of low jut 23 and the outer circumferential face 42a crimping of wide diameter portion 42, low jut 23 is fixed on the outer circumferential face 42a of wide diameter portion 42 with the few state of elastic deformation amount.
Axially arranging substantially in parallel of the low back side 23a of low jut 23 and valve guide bushing 40.Thus, when the compressed wide diameter portion 42 that is matched with valve guide bushing 40 of low jut 23, the compressive stress that can make low jut 23 produce is even.In addition, high back side 24a preferably with the outer circumferential face 41a almost parallel of valve guide bushing 40.Thus, when valve oil seal 1 is installed on to valve guide bushing 40, can easily valve guide bushing 40 be inserted in valve oil seal 1.
In addition, the stepped part 25 that is positioned at the inlet side of low jut 23 is limited to the stepped part 43 of the inlet side that is positioned at wide diameter portion 42 of valve guide bushing 40.In present embodiment, be provided with the tabular surface 43a forming along radially at the inlet side of the wide diameter portion 42 of valve guide bushing 40, the surperficial 25a of the stepped part 25 in this tabular surface 43a and valve oil seal 1, i.e. the side butt (Fig. 3) of high jut 24.Now, high jut 24 by with the position axially locating of tabular surface 43a butt.Thus, valve oil seal 1 can with respect to valve guide bushing 40 precision good be positioned, and can prevent from coming off from valve guide bushing 40.
The surperficial 25a of stepped part 25 is the plane of inclination (Fig. 3) that link with respect to low back side 23a formation obtuse angle alpha.Thus, when valve oil seal 1 is installed on to valve guide bushing 40, because move on crimping limit on the 44Bian plane of inclination, bight of wide diameter portion 42, thus can easily make valve oil seal 1 move to engagement position, thus valve oil seal 1 can be easily installed.
Between the high jut 24 of engagement portion 22 and the diameter reducing part 41 of valve guide bushing 40, a small amount of space 45 is set.Thus, owing to not producing compressive stress at high jut 24, resiliently deformable does not occur, so even if high jut 24 is being installed on after valve guide bushing 40, also can maintain with install before the roughly the same shape of shape.Therefore, can make stepped part 25 engagement reliably by the stepped part of valve guide bushing 40 43.
As mentioned above, according to present embodiment, the engagement portion 22 of the sealed department 20 engaging with valve guide bushing 40 has following member: the low jut 23 with low back side 23a; More outstanding and there is high back side 24a, the high jut 24 that the more close inlet side of lower jut 23 arranges than this low jut; Be arranged on the stepped part 25 between low jut 23 and high jut 24.Thus, while installation, can make the appropriate resiliently deformable of low jut 23 as the position coordinating with valve guide bushing 40 on valve guide bushing 40, thus this low jut compressed valve guide bushing 40 that is matched with under the effect of appropriate distortional stress.Its result, can prevent from producing excessive stress at low jut 23, and can prevent the abnormal of installment state.In addition, by stepped part 25 being set between low jut 23 and high jut 24, stepped part 25 is limited to valve guide bushing 40 reliably.Therefore, can excessively not increase coordinate force, can make valve oil seal 1 easily be installed on valve guide bushing 40, thereby can prevent that loosening, the valve oil seal 1 of valve oil seal 1 from coming off from valve guide bushing 40.In addition,, also can prevent for a long time the loosening of valve oil seal 1 or come off from outside vibrations etc. even be subject to after installation.
In addition, low back side 23a due to valve guide bushing 40 axially substantially in parallel arrange, so while being installed on valve guide bushing 40, compression joint area between the outer circumferential face 42a of the low back side 23a of low jut 23 and the wide diameter portion 42 of valve guide bushing 40 increases, and can be suppressed at the inequality of compressive stress direction in face of the low back side 23a generation of low jut 23.
Valve oil seal is used in the engine valve of the internal-combustion engine of automobile or general industry apparatus especially.But due to used engine valve sliding movement repeatedly, so the coordinate force of valve oil seal reduces, valve oil seal comes off sometimes.Under such Environmental Conditions, by valve oil seal 1 of the present utility model being assemblied in to the engine valve of internal-combustion engine, can bring into play above-mentioned effect.
Above the valve oil seal of above-mentioned mode of execution is described, but the utility model is not limited to the mode of execution of describing, and can carry out various distortion and change based on technical conceive of the present utility model.
For example, in the above-described embodiment, the surperficial 25a of stepped part 25 is the plane of inclination that link low back side 23aYu Gao back side 24a, but is not limited thereto, and can be the face perpendicular to low back side 23a.
Low back side 23a is to have the area that can bring into play essential coordinate force as prerequisite, and low back side 23aYu Gao back side 24a can have the area differing from one another, and also can have identical area.
And then, in above-mentioned mode of execution, between the high jut 24 of engagement portion 22 and the diameter reducing part 41 of valve guide bushing 40, being provided with gap 45, but being not limited thereto, the high jut 24 of engagement portion 22 can be against each other with the diameter reducing part 41 of valve guide bushing 40.
And then in above-mentioned mode of execution, valve oil seal 1 has back pressure lip 26, but also can not there is this back pressure lip.
In addition, in present embodiment, cylindrical portion 11 directly links each other with lip part 12, but is not limited thereto, and cylindrical portion 11 can link via curved part with lip part 12, can also link via the position of other shapes.
Utilizability in industry
Valve oil seal of the present utility model is preferred for the engine valve of various internal-combustion engines etc., and the valve oil seal of particularly using as the engine valve of the internal-combustion engine of automobile or general industry apparatus is extremely useful.
Claims (6)
1. a valve oil seal, it is installed on valve stem, and has the holding part of the roughly tubular being formed by metallic material and the sealed department that is linked to this holding part, is formed by elastomer, and described valve oil seal is characterised in that,
Described holding part has the cylindrical portion of surrounding the outer circumferential face of valve guide bushing and configure and is arranged on the lip part of the upper end of this cylindrical portion,
Described sealed department has sealing lip and the engagement portion with the outer circumferential face butt of described valve stem, and described engagement portion and sealing lip are integrally formed and cover the inner peripheral surface of described cylindrical portion and configure, and engage with the outer circumferential face of described valve guide bushing,
Described engagement portion has following member: low jut from the low back side to radially inner side that give prominence to and have; Further give prominence to and there is the high back side to radially inner side from this low jut, and the high jut that more close inlet side arranges compared with described low jut; Be arranged on the stepped part between described low jut and described high jut.
2. valve oil seal as claimed in claim 1, is characterized in that, the outer circumferential face of the described low back side and described valve guide bushing is set up substantially in parallel.
3. valve oil seal as claimed in claim 1, is characterized in that, described stepped part has the plane of inclination of the described low back side and described high back side link.
4. valve oil seal as claimed in claim 1, it is characterized in that, described valve guide bushing has the diameter reducing part outstanding to radial outside, from this diameter reducing part further to the outstanding wide diameter portion of radial outside, be arranged on other stepped part between described diameter reducing part and described wide diameter portion
The low jut compressed fit of described engagement portion is in the described wide diameter portion of described valve guide bushing, and the described stepped part of described engagement portion is limited to described other stepped part of described valve guide bushing.
5. valve oil seal as claimed in claim 1, is characterized in that, described sealed department has the back pressure lip that forms and be connected to slidably the outer circumferential face of described valve stem in one end of described sealing lip.
6. valve oil seal as claimed in claim 1, is characterized in that, it is for the engine valve of internal-combustion engine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014003054U JP3192572U (en) | 2014-06-10 | 2014-06-10 | Valve stem seal |
| JP2014-003054U | 2014-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002967U true CN204002967U (en) | 2014-12-10 |
Family
ID=52042985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420443768.1U Expired - Fee Related CN204002967U (en) | 2014-06-10 | 2014-08-07 | Valve oil seal |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3192572U (en) |
| CN (1) | CN204002967U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114143A (en) * | 2015-09-11 | 2015-12-02 | 安徽全柴动力股份有限公司 | Sealing oil seal for valve rod of diesel engine |
| CN108368938A (en) * | 2015-12-08 | 2018-08-03 | Nok株式会社 | Valve oil seal |
-
2014
- 2014-06-10 JP JP2014003054U patent/JP3192572U/en not_active Expired - Lifetime
- 2014-08-07 CN CN201420443768.1U patent/CN204002967U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114143A (en) * | 2015-09-11 | 2015-12-02 | 安徽全柴动力股份有限公司 | Sealing oil seal for valve rod of diesel engine |
| CN108368938A (en) * | 2015-12-08 | 2018-08-03 | Nok株式会社 | Valve oil seal |
| US10962142B2 (en) | 2015-12-08 | 2021-03-30 | Nok Corporation | Valve stem seal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3192572U (en) | 2014-08-21 |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20170807 |