CN203906798U - Oil seal - Google Patents
Oil seal Download PDFInfo
- Publication number
- CN203906798U CN203906798U CN201420193322.8U CN201420193322U CN203906798U CN 203906798 U CN203906798 U CN 203906798U CN 201420193322 U CN201420193322 U CN 201420193322U CN 203906798 U CN203906798 U CN 203906798U
- Authority
- CN
- China
- Prior art keywords
- lip
- oil sealing
- sealing
- dust excluder
- axle
- 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
Links
Abstract
The utility model provides an oil seal. The oil seal with a simple structure can improve the rigidity of a sealing lip and can be easily manufactured. The oil seal (1) is provided with a metal ring (10) and a sealing lip (20) being made of an elastic body and maintained on the metal ring; the metal ring (10) is provided with a cylindrical part (11) approximately concentric with a rotation shaft (60), and a flange part (12) integrally formed on the end part of the A side outside the cylindrical part; the sealing lip (20) is provided with a main sealing lip (21) for sealing a sealing object, a dustproof lip (22) axially arranged on the A side outside the main sealing lip (21), and a lip waist part (23) arranged between the main sealing lip (21) and the dustproof lip (22) and connecting the main sealing lip (21) with the dustproof lip (22); an inner end part (12a) of the flange part (12) is arranged on the lip waist part (23).
Description
Technical field
The utility model relates to the oil sealing using in the axle of industry pump carrying on machine etc., the oil sealing particularly using in construction Machines oil pressure pump.
Background technique
At present, in construction Machines oil pressure pump, oil sealing frequently uses under hyperbaric environment.Under hyperbaric environment, the primary seal lip of oil sealing is out of shape and is urged on axle because of high pressure, and abnormal heating, excessive wear occur sometimes.Extreme in the situation that, because the reversion breakage of sealing lip reduces sealing early.So, in order to solve such problem, for example, the oil sealing shown in Fig. 6 has been proposed.
Existing oil sealing 100 possesses section and is roughly the metal ring 103 of L word shape, the rubber-like elasticity system coating portion 102 as elastic member, supporting ring 104 and the spring 105 of ring-type, using the shell of 2 parts and the annular seals of axle as concentric installation.There is the primary seal lip 122 extending inward and slide on axle in the internal side diameter end of coating portion 102.
The recess 134 of the internal side diameter end that metal ring 103 has the lip part 132 that extends axially and be flush-mounted in the cylinder portion 131 of shell, extend inward from the outside A ' side end of cylinder portion 131, be arranged on lip part 132, the inside diameter 133 extending to sealed object B ' side from the internal side diameter end of recess 134.
Supporting ring 104 comprises section and roughly becomes L word shape, the axially extended inside lip part 142 extending to internal side diameter as the cylinder portion 141 of cylindrical portion with from the sealed object B ' side end of cylinder portion 141.Supporting ring 104 arranges across gap with respect to metal ring 103.
The end face 141a of supporting ring 104 is in the rubber-like elastic body of coating portion 102 is disposed in the recess 134 of metal ring 103.In addition, cylinder portion 141 is along the inside diameter 133 of recess 134 and arrange across the rubber-like elastic body of coating portion 102.
The oil sealing 100 forming is like this between metal ring 103 and supporting ring 104, gap be set and be held under the state of mould, in this mould, flows into rubber material, thus by metal ring 103 and supporting ring 104 across rubber material moulding integratedly.
Model utility content
But, in above-mentioned existing oil sealing, although disclose the rigidity that improves sealing lip by configuring 2 metal ring-shaped members processed, must be made into 2 metal ring-shaped members processed and be fitted to each other, its complex structure.In addition, because must be when 2 metal ring-shaped members processed are kept at certain intervals, liquid rubber material be flowed in mould and one-body molded, so production job is loaded down with trivial details.
The purpose of this utility model is to provide a kind of can improve simply to construct the rigidity of sealing lip, the oil sealing that can easily make.
To achieve these goals, oil sealing of the present utility model is to possess metal ring, be held in the oil sealing of the elasticity system sealing lip of above-mentioned metal ring, it is characterized in that, above-mentioned sealing lip has and the axle butt as adherend the primary seal lip that sealed object is sealed, be disposed in the axial direction the outer side of above-mentioned primary seal lip and with integrated the 1st dust excluder lips of above-mentioned primary seal lip, be configured between above-mentioned primary seal lip and above-mentioned the 1st dust excluder lips and by the lip waist of above-mentioned primary seal lip and above-mentioned the 1st dust excluder lips link, above-mentioned metal ring have with above-mentioned axle roughly concentric arrangement cylindrical portion and be arranged on the lip part of outer side end of this cylindrical portion, the inner end of above-mentioned lip part is configured in above-mentioned lip waist.
In addition, at the internal diameter of above-mentioned lip part be preferably
the external diameter of above-mentioned axle is
time, meet
In addition, above-mentioned lip part has the end difference radially forming along this lip part.
Preferred above-mentioned end difference has the continuous shape without flex point at the radial section of above-mentioned lip part.
In addition, above-mentioned oil sealing also have be configured in above-mentioned lip waist, to the inside of above-mentioned oil sealing and to extended the 2nd dust excluder lips of above-mentioned outer side, above-mentioned the 2nd dust excluder lips is positioned near the above-mentioned axle side of inner end of above-mentioned lip part.
And then, above-mentioned the 1st dust excluder lips have to the base portion internally extending of above-mentioned oil sealing and from this base portion further extend inward out and with the end of above-mentioned axle butt, the angle of extending direction and above-mentioned axle of above-mentioned end is less than the angle of extending direction and above-mentioned axle of above-mentioned base portion.
In addition, above-mentioned end has and is arranged on above-mentioned the 2nd dust excluder lips side and the axle bearing surface with above-mentioned axle butt.
In addition, preferred above-mentioned oil sealing is installed in the axle of oil pressure pump.
And then more preferably above-mentioned oil sealing is the oil pressure pump oil sealing that is equipped on building machinery.
According to the utility model, metal ring has lip part, and the inner end of lip part is configured in lip waist.Thus, can improve the rigidity of lip waist, can suppress lip waist, be out of shape because of pressure with the primary seal lip of its link.In addition, by using 1 metal ring, the inner end of lip part is configured in to lip waist, can be simply to construct the rigidity that improves sealing lip.In addition, because use 1 metal ring, so without liquid rubber material being flowed into the numerous and diverse operation in mould when 2 metal rings are kept at certain intervals, it is easy that production job becomes.
In addition, because the internal diameter of lip part
with respect to the external diameter of axle
for the scope of+1.0mm～+ 4.0mm, thus can improve near rigidity primary seal lip, and while preventing the eccentric shaft as adherend lip part be coupling tactile.
And then, because lip part along this lip part radially there is end difference, so can improve the flexural rigidity in the axial direction of adherend, without the high rigidity that increases component number and just can realize sealing lip.
In addition, the 1st dust excluder lips have to the base portion internally extending of oil sealing and from this base portion further extend inward out and with the end of axle butt, the angle of extending direction and axle of above-mentioned end is less than the angle of extending direction and axle of above-mentioned base portion.Thus, it is large that the 1st end of dust excluder lips and the area of contact of axle become, and can improve protection against dust.
And then, by oil sealing of the present utility model being used as to the oil pressure pump oil sealing that is equipped on building machinery, can bring into play reliably above-mentioned effect.
Brief description of the drawings
Fig. 1 is the sectional drawing that diagrammatically represents the oil sealing formation of the utility model the 1st mode of execution.
Fig. 2 is the part amplification profile of the sealing lip in Fig. 1.
Fig. 3 is the sectional drawing of the variation of the end difference in the oil sealing of presentation graphs 2.
Fig. 4 is the fragmentary cross-sectional view that diagrammatically represents the oil sealing formation of the utility model the 2nd mode of execution.
Fig. 5 is illustrated in the fragmentary cross-sectional view that has been coated with the state of lubricant composition on the oil sealing of Fig. 4.
Fig. 6 is the sectional drawing that represents the formation of existing oil sealing.
symbol description
1 oil sealing
10 metal rings
11 cylindrical portion
12 lip parts
12 ' lip part
12a inner end
12b end face
12c end difference
12c ' end difference
20 sealing lips
21 primary seal lip
22 dust excluder lips
23 lip waists
24 tops
25 rakes
26 rakes
30 garter springs
40 sealing lips
41 primary seal lip
42 dust excluder lips
43 lip waists
44 dust excluder lips
45 base portions
46 ends
46a axle bearing surface
51 lubricant compositions
52 lubricant compositions
60 running shafts
60a outer circumferential face
Embodiment
Describe mode of execution of the present utility model in detail referring to accompanying drawing.
Fig. 1 is the fragmentary cross-sectional view that diagrammatically represents the oil sealing formation of the utility model mode of execution.This oil sealing is for various machines, particularly oil pressure pump, for the object of (hereinafter referred to as the sealed object) sealings such as the lubricant oil composite of filling in machine is installed on to axle.Should illustrate, the oil sealing of Fig. 1 provides one of them example, and oil sealing of the present utility model forms the oil sealing that is not limited to Fig. 1.
Oil sealing 1 possesses metal ring 10, be held in the elasticity system sealing lip 20 of this metal ring, be flush-mounted in the garter spring 30 of sealing lip.Oil sealing 1 is roughly circular parts, and insert the running shaft 60 as adherend in space in its ring-type time, the interior perimembranous of sealing lip 20 is crimped on the outer circumferential face 60a of running shaft 60 under the elastic force effect of garter spring 30.
Metal ring 10 has and the roughly cylindrical portion 11 of configuration and the lip part 12 of the one-body molded outside A side end in this cylindrical portion with one heart of running shaft 60, and its radial section is L font roughly.Sealing lip 20 bonding by Vulcanizations are in this metal ring 10.
Sealing lip 20 has the primary seal lip 21 of sealed object sealing, is disposed at the outside A side of primary seal lip 21 in the axial direction and dust excluder lips 22(the 1st dust excluder lips that the dust that can enter from outside is removed), the lip waist 23 that is configured between primary seal lip 21 and dust excluder lips 22 and primary seal lip 21 and dust excluder lips 22 are linked.Sealing lip 20 is by elastomer formations such as synthetic rubber.
The radial section of primary seal lip 21 is roughly V-shape, and its top is crimped on the outer circumferential face of running shaft 60 slidably.Particularly, as shown in Figure 2, primary seal lip 21 have the outer circumferential face that is crimped on running shaft top 24, be arranged near this top and be formed on the outside A side at top 24 rake 25, be arranged near at top 24 and be formed on the rake 26 of the sealed object B side at this top.Rake 26 is formed at the opposition side of rake 25 at top 24.
Dust excluder lips 22 is the tongue-shaped positions that are configured in the outside A side of lip part 12, to inner (towards the direction of running shaft 60) and extend to outside A side.When oil sealing 1 is installed on running shaft 60, the end of dust excluder lips 22 is connected to the outer circumferential face 60a of running shaft 60.Thus, dust is removed by dust excluder lips 22.
In the utility model, the inner end 12a of lip part 12 is configured in lip waist 23.In other words, lip waist 23 is configured between the inner end 12a and running shaft 60 of lip part 12, and particularly, lip waist 23 is positioned on the normal surface of the flange surface that formed by inner end 12a and running shaft 60., metal inner end 12a processed forms the reinforcing material of elasticity system lip waist 23.
In addition, the internal diameter of lip part 12 is specified by the distance between end face 12b, the 12b of inner end 12a.The internal diameter of lip part 12 is
the external diameter of above-mentioned axle is
time, meet
preferably
while being less than 1.0mm, the interval of running shaft 60 and lip part 12 narrows, and running shaft 60 easily contacts with the inner end 12a of lip part 12 when eccentric.On the other hand,
while being greater than 4.0mm, the rigidity of lip waist 23 reduces, and near rigidity primary seal lip 21 reduces, and sealing lip 20 is easily out of shape.Therefore,
for the value in above-mentioned scope.
In addition, lip part 12 has the end difference 12c radially forming along this lip part.In the present embodiment, this end difference 12c forms continuous end difference in the radial section of lip part 12, and its section is roughly S word shape.Thereby, can improve the flexural rigidity of the lip part 12 in the axial direction of running shaft 60.
Consider from the viewpoint that stress is concentrated, end difference more preferably has the continuous shape without flex point, and end difference can not be also the shape shown in Fig. 2, can also have discontinuity point.As shown in Figure 3, in the radial section of lip part 12 ', end difference 12c ' can be crank shape roughly to example.The end difference 12c ' of shape also can improve the flexural rigidity of lip part 12 ' like this.
Fig. 4 is the fragmentary cross-sectional view that diagrammatically represents the oil sealing formation of the utility model the 2nd mode of execution.The oil sealing of Fig. 1 has 1 dust excluder lips, and the oil sealing of Fig. 4 has 2 dust excluder lips, for the part beyond dust excluder lips, because basic identical with the oil sealing of Fig. 1, so omit the explanation of common part, different parts is below described.
In Fig. 4, sealing lip 40 there is the outside A side of primary seal lip of being configured in 41 and with the integrated dust excluder lips 42 of primary seal lip 41 (the 1st dust excluder lips), be configured in lip waist 43 and to the inside of oil sealing 2 and to the extended dust excluder lips 44 of outside A side (the 2nd dust excluder lips).
The inner end 12a that dust excluder lips 42 is compared lip part 12 is configured in outside A side, and compares lip waist 43 and be configured in outside A side.This dust excluder lips 42 have to the base portion internally extending 45 of oil sealing 2 and from this base portion further extend inward out and with the end 46 of running shaft 60 butts.In addition, base portion 45 extend direction X and end 46 to extend direction Y different, the angle of extending direction Y and running shaft 60 of end 46 is less than the angle of extending direction X and running shaft 60 of base portion 45.End 46 has the dust excluder lips of being arranged on 44 sides and the axle bearing surface 46a with running shaft 60 butts.
According to this formation, when oil sealing 2 is installed in running shaft 60, the outer circumferential face 60a butt of axle bearing surface 46a and running shaft 60, thereby compare with the situation that direction Y is identical of extending of extending direction X and end 46 of base portion 45, guarantee reliably the bearing surface of end 46 and running shaft 60, in addition, its butt area increases.Thereby the dust that can enter from outside A side is removed by dust excluder lips 42.
Dust excluder lips 44 is positioned on the normal surface of the flange surface that formed by the inner end 12a of lip part 12 and running shaft 60, and then is positioned near the rotation shaft side of inner end 12a.,, in Fig. 4, suppose that when cylindrical portion 11 is downside for upside, inner end 12a, dust excluder lips 44 is positioned under the rotation shaft side of inner end 12a (or end face 12b).In addition, this dust excluder lips 44 is shaped in lip waist 43, dust excluder lips 44 extend the length of extending that length is less than dust excluder lips 42.Therefore, the rigidity of dust excluder lips 44 is higher than the rigidity of dust excluder lips 42.When oil sealing 2 is installed on to running shaft 60, the end 44a of dust excluder lips 44 is connected to the outer circumferential face 60a of running shaft 60, on this outer circumferential face, slides.Therefore, producing under the environment of a large amount of dusts, not only by dust excluder lips 42, can also be by dust excluder lips 44 reliably except dust.
In addition, in the utility model, as shown in Figure 5, between primary seal lip 41 and dust excluder lips 44, be coated with lubricant composition 51, and then, between dust excluder lips 44 and dust excluder lips 42, be coated with lubricant composition 52.Particularly, lubricant composition 51 is enclosed to the space being separated by primary seal lip 41, dust excluder lips 44 and running shaft 60.In addition, lubricant composition 52 is enclosed to the space being separated by dust excluder lips 44, dust excluder lips 42 and running shaft 60.Thus, maintain the lubricated of primary seal lip 41, and maintain the lubricated of dust excluder lips 44.
Lubricant composition the 51, the 52nd, the oiling agent of the semisolid taking base oil, water-thickening agent and additive as primary coil or solid shape, is that general lubricant composition, for example soap using in the slide part of metal and resin is that lubricating grease, non-soap are the special lubricating grease using in lubricating grease, particular surroundings.Lubricant composition of the present utility model is that base oil is the composition that mineral oil, water-thickening agent are lithium soap, or base oil is that synthetic hydrocarbon oil, water-thickening agent are the composition of barium composite soap.As lubricant composition, use NOK Crewe C Compaq's system " SEALUB S-1 " or " SEALUB S-14 ".
As mentioned above, according to present embodiment, because the inner end 12a of lip part 12 is configured in lip waist 23, so can improve the rigidity of lip waist 23, can suppress lip waist 23, the primary seal lip 21 that links is out of shape because of pressure with it.In addition, by using 1 metal ring 10, inner end 12a is configured in to lip waist 23, can be simply to construct the rigidity that improves sealing lip 20.In addition, because use 1 metal ring, so without liquid rubber material being flowed into the loaded down with trivial details operation in mould when 2 metal rings are kept at certain intervals, it is easy that production job becomes.
In addition, because the internal diameter of lip part 12
with respect to the external diameter of axle
for the scope of+1.0mm～+ 4.0mm, thus near rigidity primary seal lip 21 can be improved, and lip part 12 contacts with running shaft 60 can prevent that running shaft 60 is eccentric time.
And then, because lip part 12 along this lip part radially there is end difference 12a, so can improve the flexural rigidity in the axial direction of running shaft 60, so without increasing component number, can realize the high rigidity of sealing lip 20.
In addition, dust excluder lips 42 have to the base portion internally extending 45 of oil sealing 2, from this base portion further extend inward out and with the end 46 of running shaft 60 butts, the angle of extending direction Y and running shaft 60 of end 46 is less than the angle of extending direction X and running shaft 60 of base portion 45.Thus, it is large that the end 46 of dust excluder lips 42 and the area of contact of running shaft 60 become, and can improve dust fastness.
Particularly be equipped in the oil pressure pump of building machinery, have oil sealing under high pressure to use and produce the situation of a large amount of dusts.In such Environmental Conditions, by oil sealing 1,2 of the present utility model being installed on to the axle of oil pressure pump, can bring into play reliably above-mentioned effect.
Above the oil sealing of above-mentioned mode of execution is described, but the utility model is not limited to described mode of execution, can carries out various distortion and change based on technical conceive of the present utility model.
For example, in the above-described embodiment, the section of metal ring is roughly L-type, but also can be other shapes such as U font.
In addition, the radial section of primary seal lip is roughly V-shape, but is not limited thereto, as long as have the end of crimping slidably and running shaft outer circumferential face, can be also other shapes.
In addition, sealing lip of the present utility model possesses garter spring, but also can not possess garter spring.
Utilizability in industry
Oil sealing of the present utility model is applicable to be mounted in the oil pressure pump of various industries on machine etc., particularly exceedingly useful with oil sealing as high pressure.
Claims (9)
1. an oil sealing, is the oil sealing that possesses metal ring, is held in the elasticity system sealing lip of described metal ring, it is characterized in that,
Described sealing lip possesses and as the axle butt of adherend and by the primary seal lip of sealed object sealing, the outer side that is disposed in the axial direction described primary seal lip and integrated the 1st dust excluder lips of described primary seal lip, the lip waist that is configured between described primary seal lip and described the 1st dust excluder lips and described primary seal lip and described the 1st dust excluder lips are linked
Described metal ring has the cylindrical portion roughly configuring with one heart with described axle and is arranged on the lip part of the outer side end of this cylindrical portion,
The inner end of described lip part is configured in described lip waist.
2. oil sealing as claimed in claim 1, is characterized in that, the internal diameter of establishing described lip part is
, described axle external diameter be
time, meet
.
3. oil sealing as claimed in claim 1 or 2, is characterized in that, described lip part has the end difference radially forming along this lip part.
4. oil sealing as claimed in claim 3, is characterized in that, described end difference has the continuous shape without flex point in the radial section of described lip part.
5. oil sealing as claimed in claim 1, is characterized in that, also have be configured in described lip waist, to the inside of described oil sealing and to extended the 2nd dust excluder lips of described outer side,
Described the 2nd dust excluder lips is positioned near the described axle side of inner end of described lip part.
6. oil sealing as claimed in claim 1, is characterized in that, described the 1st dust excluder lips have to the base portion internally extending of described oil sealing, from this base portion further extend inward out and with the end of described axle butt,
The angle of extending direction and described axle of described end is less than the angle of extending direction and described axle of described base portion.
7. oil sealing as claimed in claim 6, it is characterized in that, also have be configured in described lip waist, to the inside of described oil sealing and to extended the 2nd dust excluder lips of described outer side, described end has and is arranged on described the 2nd dust excluder lips side and the axle bearing surface with described axle butt.
8. oil sealing as claimed in claim 1, is characterized in that, described oil sealing is installed in the axle of oil pressure pump.
9. oil sealing as claimed in claim 8, is characterized in that, described oil sealing is the oil pressure pump oil sealing that is equipped on building machinery.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014000036U JP3189592U (en) | 2014-01-07 | 2014-01-07 | Oil seal |
| JP2014-000036 | 2014-01-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906798U true CN203906798U (en) | 2014-10-29 |
Family
ID=51781079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420193322.8U Expired - Fee Related CN203906798U (en) | 2014-01-07 | 2014-04-18 | Oil seal |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3189592U (en) |
| CN (1) | CN203906798U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107532721A (en) * | 2015-05-11 | 2018-01-02 | Nok株式会社 | Sealing device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357016A (en) * | 2018-09-28 | 2019-02-19 | 重庆春阳密封制品有限公司 | Dust-proof grease proofing combination oil seal |
-
2014
- 2014-01-07 JP JP2014000036U patent/JP3189592U/en not_active Expired - Lifetime
- 2014-04-18 CN CN201420193322.8U patent/CN203906798U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107532721A (en) * | 2015-05-11 | 2018-01-02 | Nok株式会社 | Sealing device |
| US10605368B2 (en) | 2015-05-11 | 2020-03-31 | Nok Corporation | Sealing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3189592U (en) | 2014-03-20 |
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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: 20141029 Termination date: 20170418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |