CN206017734U - Sealing device - Google Patents
Sealing device Download PDFInfo
- Publication number
- CN206017734U CN206017734U CN201620773043.8U CN201620773043U CN206017734U CN 206017734 U CN206017734 U CN 206017734U CN 201620773043 U CN201620773043 U CN 201620773043U CN 206017734 U CN206017734 U CN 206017734U
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- CN
- China
- Prior art keywords
- dust cover
- sealing
- irrotational
- cylindrical portion
- machine
- 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.)
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Abstract
This utility model provides a kind of sealing device of the combination including oil sealing and dust cover, it is intended to improve the sealing to foreigns such as muddy water and dusts.The sealing device includes：Oil sealing, is installed on shell and the sealing fluid in machine is sealed；Dust cover, dust cover on the outside of the machine of oil sealing is installed on rotary shaft and is rotated together with rotary shaft, it is characterized in that, irrotational cylindrical portion is set at least a portion of the outer circumferential side of dust cover, minim gap is set between the outer peripheral face of dust cover and the inner peripheral surface of cylindrical portion and contactless labyrinth based on minim gap is set.Irrotational cylindrical portion is formed by the reinforcing ring, the cartridge for being embedded in shell for being contained in oil sealing or with the integrally formed barrel of shell.
Description
Technical field
This utility model is related to the sealing device with regard to Sealing Technology.Sealing device of the present utility model is for example as automobile
The sealing member of drivetrain (differential mechanism, differential pinion, transfer gear etc.) is used.
Background technology
According to following sealing device known in the art：As shown in figure 8, the sealing device includes being installed on shell 61 simultaneously
The oil sealing 51 of the sealing fluid of I in sealer, is provided for making the foreigns such as muddy water and dust difficult in the outer O sides of the machine of oil sealing 51
To be close to the dust cover 52 of oil sealing 51.Oil sealing 51 includes primary seal lip 53, by slidably contacting with primary seal lip 53
The outer peripheral face of rotary shaft 62 come to seal fluid seal.On the other hand, dust cover 52 is installed on O sides outside the machine of oil sealing 51
The outer peripheral face of rotary shaft 62 is rotated together with rotary shaft 62.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication JP 2013-113319 publications
The sealing device of said structure is pressed down due to the sealing fluid by I in 51 sealer of oil sealing and by dust cover 52
Foreign processed is invaded, therefore, it is possible to play excellent sealing function.
However, in recent years, this sealing device is used on the basis of increasingly rigor condition, accordingly, it would be desirable to further
Sealing is improved, especially for the sealing of the foreigns such as muddy water and dust.
Utility model content
This utility model is in view of the above, it is therefore intended that provide a kind of sealing dress of combination including oil sealing and dust cover
Put, the sealing device can improve the sealing to foreigns such as muddy water and dusts.
To achieve these goals, this utility model adopts following method.
That is, sealing device of the present utility model includes：Oil sealing, the oil sealing are installed on shell and to the sealing fluid in machine
Sealed；Dust cover, the dust cover are installed on rotary shaft and on the outside of the machine of the oil sealing together with the rotary shaft
Rotation, it is characterised in that irrotational cylindrical portion is set at least a portion of the outer circumferential side of the dust cover, described dust-proof
Minim gap is set between the inner peripheral surface of the outer peripheral face of cover and the cylindrical portion, so as to be provided with based on the non-of the minim gap
The labyrinth of contact.
In the sealing device of the present utility model for including said structure, dust-proof due to being provided with the outside of the machine of oil sealing
Cover, therefore, the foreign such as muddy water and dust is difficult to be close to oil sealing, is additionally, since at least one of the outer circumferential side in dust cover
Part is provided between irrotational cylindrical portion, and the outer peripheral face by dust cover and the inner peripheral surface of cylindrical portion and is provided with based on micro-
Closely spaced contactless labyrinth, therefore, the foreign such as muddy water and dust is further difficult to be close to oil sealing.
Therefore, it is possible to improve the sealing to foreigns such as muddy water and dusts.
Irrotational cylindrical portion is for example by the reinforcing ring, the cartridge for being embedded in shell or and shell for being contained in oil sealing
Integrally formed barrel is formed.
Additionally, irrotational cylindrical portion is configured to be overlapped relative to dust cover in the axial direction, while before its axial direction can be made
End is formed as further prominent to axially side length compared with dust cover, according to so, due to the leading section of cylindrical portion
Project as eaves with minim gap relative to dust cover and play the effect for blocking foreign, thus, foreign is difficult
To invade minim gap.
Additionally, by making dust cover be integrated the inner circumferential cylinder portion of the outer peripheral face including being embedded in rotary shaft, from inner circumferential cylinder portion
Machine outboard end be radially oriented the integrally formed flange part in outside, from the peripheral end of flange part towards machine on the inside of be integrally formed
Periphery cylinder portion structure, oil sealing is the structure for including lateral lip portion, so as to lateral lip portion can slidably contact the flange of dust cover
The machine inner side end in portion.In such case, due to the axially spaced-apart between the machine inner side end and oil sealing of the flange part of dust cover
It is set to relatively wide, therefore, lateral lip portion can be with the machine inner side end of the flange part of its leading section contact dust cover.
Utility model effect
According to this utility model, the sealing device including the combination of oil sealing and dust cover can be improved to muddy water and dust etc.
The sealing of foreign.
Description of the drawings
Fig. 1 is the main portion sectional view of the sealing device according to first embodiment of the present utility model.
Fig. 2 is the main portion sectional view of the sealing device according to second embodiment of the present utility model.
Fig. 3 is the main portion sectional view of the sealing device according to 3rd embodiment of the present utility model.
Fig. 4 is the main portion sectional view of the sealing device according to fourth embodiment of the present utility model.
Fig. 5 is the main portion sectional view of the sealing device according to the 5th embodiment of the present utility model.
Fig. 6 is the main portion sectional view of the sealing device according to sixth embodiment of the present utility model.
Fig. 7 is the main portion sectional view of the sealing device according to the 7th embodiment of the present utility model.
Fig. 8 is the main portion sectional view of the sealing device according to prior art example.
Symbol description
11 sealing devices
21 oil sealings
22 reinforcing rings
22a cylindrical portion
22b end face portions
22c cylindrical portions
23 rubber-like elastic bodies
24 primary seal lips
25 springs
26 dirt lips
27 lateral lip portions
31 dust covers
31a inner circumferential cylinders portion
31b inversion portions
Second portion of 31c
31d, 31f flange part
31e, 31g periphery cylinder portion
41 irrotational cylindrical portions
41a leading sections
41b bending sections
42 labyrinths
43 cartridges
61 shells
61a barrels
62 rotary shafts
C minim gaps
In I machines
Outside O machines
Specific embodiment
Then, embodiment of the present utility model is described with reference to.
First embodiment
Fig. 1 illustrates the major part section of the sealing device 11 according to first embodiment of the present utility model.As differential
Device sealing member, the sealing device 11 according to the embodiment be to differential mechanism seal so that in machine the bearing lubrication grease of I or
Lubricating oil does not leak to the outer O of machine, while sealing to differential mechanism so that the foreign such as muddy water and dust of the outer O of machine is not invaded to machine
The structure of interior I, is constituted as follows.
That is, sealing fluid (above-mentioned grease or the profit of I in the axis hole inner circumferential sealer for being installed on shell 61 are provided with
Lubricating oil) oil sealing 21, on the outside of the machine of oil sealing 21, be provided with the dust cover 31 for being close to oil sealing 21 for being difficult to foreign.
Additionally, the outer circumferential side in dust cover 31 arranges irrotational cylindrical portion 41, in the outer peripheral face of dust cover 31 and cylindrical portion 41
The minim gap c of radial direction is set between side face, contactless labyrinth 42 is arranged by minim gap c.
Oil sealing 21 is the structure for being adhered to (crosslinking bonding) to metal reinforcing ring 22 by rubber-like elastic body 23, by the rubber
Gluey elastomer 23, primary seal lip 24, dirt lip 26 and lateral lip portion 27 are integrally formed.
Primary seal lip 24 is arranged towards its lip end on the inside of machine, is embedded in spring 25 in lip end, and passes through
Lip end is made to slidably contact with the outer peripheral face of rotary shaft 62 to seal to sealing fluid.Dirt lip 26 is configured at master
On the outside of the machine of sealed lip 24, its lip end is arranged towards on the outside of machine, and is slidably contacted with by making lip end
The outer peripheral face of rotary shaft 62 is mainly sealed to foreign.Lateral lip portion 27 is configured at outside the further machine of dirt lip 26
Side, its lip end is arranged towards on the outside of machine, and different by making lip end slidably contact with 31 pairs of outsides of dust cover
Thing is sealed.
Reinforcing ring 22 includes cylindrical portion 22a of the axis hole inner peripheral surface for being embedded in shell 61, from the outside of the machine of cylindrical portion 22a
The end of (axial side) be radially oriented outside integrally formed with end face portion 22b, from the peripheral end of end face portion 22b towards machine outside
Integrally formed with cylindrical portion 22c, cylindrical portion 22c becomes above-mentioned irrotational cylindrical portion 41 for side.Further, since cylindrical portion 22a
The inner circumferential side and end face portion 22b that are configured at shell 61 abut the end (axis hole opening circumference) of shell 61, therefore, cylindrical portion
22c is set to internal diameter size (shaft hole diameter size) of the internal diameter size more than shell 61.
On the other hand, dust cover 31 is made up of becket, is installed on the periphery of rotary shaft 62 on the outside of the machine of oil sealing 21.This
Outward, dust cover 31 includes the inner circumferential cylinder portion 31a of the outer peripheral face for being embedded in rotary shaft 62, in the machine outboard end of inner circumferential cylinder portion 31a
Be radially oriented outside and be wholely set inversion portion 31b, from inversion portion 31b towards machine on the inside of (axial opposite side) be wholely set the
Two portion 31c, are radially oriented outside from the machine medial end of second portion 31c and have been wholely set flange part 31d, from flange part
The peripheral end of 31d has been wholely set periphery cylinder portion 31e towards on the outside of machine.The lateral lip portion 27 of above-mentioned oil sealing 21 slidably connects
The machine inner side end of tactile flange part 31d.
As described above, as dust cover 31 includes periphery cylinder portion 31e, in periphery cylinder portion, the outer circumferential side of 31e arranges irrotational
Cylindrical portion 41, is set with minim gap c between the outer peripheral face and the inner peripheral surface of cylindrical portion 41 of periphery cylinder portion 31e, micro- by this
Small-gap suture c arranges contactless labyrinth 42.
Irrotational cylindrical portion 41 is configured to be overlapped relative to dust cover 31 in the axial direction.Additionally, irrotational cylindrical portion
41 are formed with its axial forward end portion 41a compared with dust cover 31 further to the length that machine is protruding outside, and thus, cylindrical portion 41 is
Its leading section 41a is relative to the structure prominent as eaves with minim gap c of dust cover 31.In figure, the overhang is (axially
Overhang) illustrated with symbol t.I.e., here overhang t refer to the axial forward end portion 41a of irrotational cylindrical portion 41 with dust-proof
The length (axial length) protruding outside to machine compared by cover 31, in this embodiment, as described above, as dust cover 31 includes periphery
The cylinder portion 31e and outer circumferential side in periphery cylinder portion 31e is configured with irrotational cylindrical portion 41, therefore, refers to irrotational cylindrical portion
41 axial forward end portion 41a is compared with the periphery cylinder portion 31e of dust cover 31 to machine length protruding outside (axial length).
Sealing device 11 including said structure is due to being provided with dust cover 31, therefore, muddy water on the outside of the machine of oil sealing 21
It is difficult to be close to oil sealing with the foreign of dust etc., is additionally, since the outer circumferential side in dust cover 31 and is provided with irrotational cylinder
It is provided between shape portion 41, and the inner peripheral surface of the outer peripheral face in dust cover 31 and cylindrical portion 41 based on the non-of minim gap c formation
The labyrinth 42 of contact, therefore, the foreign such as muddy water and dust is further difficult to be close to oil sealing 21.Therefore,
The sealing to foreigns such as muddy water and dusts can be improved.
Further, since the leading section 41a of non-orbiting cylindrical portion 41 is relative to dust cover 31 and minim gap c such as eaves
The structure for equally projecting, therefore, foreign is difficult to reach and be difficult to invade minim gap c.Therefore, also can by this way
Improve the sealing to foreigns such as muddy water and dusts.
The sealing device 11 of above-mentioned first embodiment can be considered to be added its structure or change as following.
Second embodiment
Change the shape of dust cover 31.
That is, as shown in Fig. 2 dust cover 31 includes the inner circumferential cylinder portion 31a of the outer peripheral face for being embedded in rotary shaft 62, from inner circumferential cylinder
The machine outboard end of portion 31a is radially oriented outside and has been wholely set flange part 31f, and the peripheral end from flange part 31f is towards machine
Inner side has been wholely set periphery cylinder portion 31g.Therefore, dust cover 31 is the font that global sections are substantially U, thus plays following
Action effect.
That is, the axially spaced-apart according to the present embodiment, between the machine inner side end and oil sealing 21 of the flange part 31f of dust cover 31
w2Compare with the situation of above-mentioned first embodiment be set to relatively wide (using the same intervals of above-mentioned first embodiment as w1, then
w1＜ w2).Therefore, the axial length in lateral lip portion 27 is certain, and in the first embodiment, lateral lip portion 27 is connecing near its base end part
The machine inner side end of the flange part 31d of tactile dust cover 31, in this embodiment, lateral lip portion 27 is with its leading section contact dust cover 31
Flange part 31f machine inner side end.Therefore, according to the embodiment, it is capable of the less deflection for suppressing lateral lip portion 27, thus energy
The reduction for enough realizing resistance to sliding and the abrasion for suppressing lateral lip portion 27.
3rd embodiment
Change the shape of irrotational cylindrical portion 41.
That is, as shown in figure 3, arranging the bending section towards radial outside bending in the leading section 41a of irrotational cylindrical portion 41
41b, bending section 41b act as the weir dike (sealing dykes and dams) of foreign.Therefore, according to the embodiment, due to non-rotating
The leading section 41a of cylindrical portion 41 weir dike based on bending section 41b is set, therefore, foreign is further difficult to reach and difficult
To invade minim gap c.
Fourth embodiment
Irrotational cylindrical portion 41 is set as zero relative to overhang t of dust cover 31.
In above-mentioned first to the 3rd each embodiment, by the axial forward end portion 41a of irrotational cylindrical portion 41 with
Periphery cylinder portion 31e, 31g of dust cover 31 compares protruding outside to machine, sets irrotational cylindrical portion 41 relative to dust cover 31
Overhang (axially projecting amount) be t.On the other hand, in this embodiment, as shown in figure 4, passing through irrotational cylindrical portion
41 axial length shortens, and makes the periphery cylinder portion of the axial location and dust cover 31 of the leading section 41a of irrotational cylindrical portion 41
The axial location of the machine outboard end of 31g is consistent, and thus, the leading section 41a of irrotational cylindrical portion 41 is outer with dust cover 31
The machine outboard end of all cylinder portion 31g compares not protruding outside to machine, protrusion of the irrotational cylindrical portion 41 relative to dust cover 31
Amount (axially projecting amount) t is set as zero.According to the embodiment, can be using sealing device 11 as overall axially compact.
5th embodiment
Reduce axial overlap amount of the irrotational cylindrical portion 41 relative to dust cover 31.
In above-mentioned first to fourth each embodiment, by the axial forward end portion 41a of irrotational cylindrical portion 41 with
Periphery cylinder portion 31e, 31g of dust cover 31 compares protruding outside or by the leading section 41a of irrotational cylindrical portion 41 to machine
Axial location consistent with the axial location of the machine outboard end of the periphery cylinder portion 31g of dust cover 31, irrotational cylindrical portion 41
Relative to dust cover 31 periphery cylinder portion 31g axial overlap amount be 100%, even if axial overlap amount is not 100%, due to
Minim gap c is provided between the outer peripheral face and the inner peripheral surface of cylindrical portion 41 of periphery cylinder portion 31g, thus also can be arranged based on micro-
The contactless labyrinth 42 of small-gap suture c.Here, lap refers to periphery cylinder portion 31g and irrotational tubular
Ratio of the axial length of the part that portion 41 overlaps in the axial direction relative to the axial length of periphery cylinder portion 31g.And, according to this
Kind of viewpoint, in this embodiment, as shown in figure 5, compared with the axial length L 1 of periphery cylinder portion 31g, periphery cylinder portion 31g and non-rotation
The axial length L 2 of the part that the cylindrical portion 41 for turning is overlapped in the axial direction is set as shorter (L1 ＞ L2), and thus, lap sets
It is less than 100%.According to the neodoxy of present inventor, when lap is set as more than 50%, can expect that labyrinth type is close
The sealing effectiveness of sealing 42.
Sixth embodiment
Irrotational cylindrical portion 41 is by forming with 21 detached cartridge of oil sealing.
That is, as shown in fig. 6, irrotational cylindrical portion 41 is by forming with 21 detached cartridge 43 of oil sealing, cartridge
43 is directly to be fitted together to the structure of shell 61.When this is the case, as shown, dust cover 31 can also be real above-mentioned second
Apply the shape (section is U-shaped) of example explanation.Additionally, in the leading section 41a of irrotational cylindrical portion 41, it is also possible to be arranged on
The bending section 41b of above-mentioned 3rd embodiment explanation.
7th embodiment
Irrotational cylindrical portion 41 is by forming with 61 integrally formed barrel of shell.
That is, as shown in fig. 7, irrotational cylindrical portion 41 is by being formed with 61 integrally formed barrel 61a of shell
Structure.When this is the case, as shown, dust cover 31 can also be that (section is U in the shape of above-mentioned second embodiment explanation
Font).
Claims (5)
1. a kind of sealing device, including：Oil sealing, the oil sealing are installed on shell and the sealing fluid in machine are sealed；With
Dust cover, the dust cover are installed on rotary shaft on the outside of the machine of the oil sealing and are rotated together with the rotary shaft,
Characterized in that,
In at least a portion of the outer circumferential side of the dust cover, irrotational cylindrical portion is set, the dust cover outer peripheral face with
Minim gap is set between the inner peripheral surface of the cylindrical portion, so as to be provided with the contactless labyrinth based on the minim gap
Formula sealing member.
2. sealing device according to claim 1, it is characterised in that
The irrotational cylindrical portion reinforcing ring included by the oil sealing, the cartridge for being embedded in the shell or
Formed with the integrally formed barrel of the shell.
3. sealing device according to claim 1, it is characterised in that
The irrotational cylindrical portion is configured to be overlapped relative to the dust cover in the axial direction, and the irrotational tubular
Portion is formed as further prominent to the axial side length compared with the dust cover in its axial forward end portion.
4. sealing device according to claim 2, it is characterised in that
The irrotational cylindrical portion is configured to be overlapped relative to the dust cover in the axial direction, and the irrotational tubular
Portion is formed as further prominent to the axial side length compared with the dust cover in its axial forward end portion.
5. the sealing device according to claim 1,2,3 or 4, it is characterised in that
The dust cover one is including being embedded in the inner circumferential cylinder portion of the outer peripheral face of the rotary shaft, from outside the machine in the inner circumferential cylinder portion
Side end is radially oriented the integrally formed flange part in outside, from the peripheral end of the flange part towards machine on the inside of integrally formed
Periphery cylinder portion,
The oil sealing includes lateral lip portion,
The lateral lip portion can slidably contact the machine inner side end of the flange part of the dust cover.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015146531A JP2017026073A (en) | 2015-07-24 | 2015-07-24 | Sealing device |
| JP2015-146531 | 2015-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206017734U true CN206017734U (en) | 2017-03-15 |
Family
ID=57945650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620773043.8U Active CN206017734U (en) | 2015-07-24 | 2016-07-20 | Sealing device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2017026073A (en) |
| CN (1) | CN206017734U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345252A (en) * | 2018-04-06 | 2019-10-18 | 纳博特斯克有限公司 | Sealing mechanism and the device for having the sealing mechanism |
| CN110630745A (en) * | 2018-06-25 | 2019-12-31 | Nok株式会社 | Sealing device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7352362B2 (en) * | 2019-03-11 | 2023-09-28 | 北越工業株式会社 | Shaft sealing device for screw compressor |
| JPWO2021241481A1 (en) | 2020-05-29 | 2021-12-02 |
-
2015
- 2015-07-24 JP JP2015146531A patent/JP2017026073A/en active Pending
-
2016
- 2016-07-20 CN CN201620773043.8U patent/CN206017734U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345252A (en) * | 2018-04-06 | 2019-10-18 | 纳博特斯克有限公司 | Sealing mechanism and the device for having the sealing mechanism |
| CN110345252B (en) * | 2018-04-06 | 2023-10-13 | 纳博特斯克有限公司 | Sealing mechanism and device provided with same |
| CN110630745A (en) * | 2018-06-25 | 2019-12-31 | Nok株式会社 | Sealing device |
| CN110630745B (en) * | 2018-06-25 | 2021-08-10 | Nok株式会社 | Sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017026073A (en) | 2017-02-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |