CN204253867U - Oil sealing - Google Patents
Oil sealing Download PDFInfo
- Publication number
- CN204253867U CN204253867U CN201420562777.2U CN201420562777U CN204253867U CN 204253867 U CN204253867 U CN 204253867U CN 201420562777 U CN201420562777 U CN 201420562777U CN 204253867 U CN204253867 U CN 204253867U
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- CN
- China
- Prior art keywords
- plane
- inclination
- sealing
- oil sealing
- oil
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- Expired - Fee Related
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- Sealing With Elastic Sealing Lips (AREA)
Abstract
The utility model provides a kind of oil sealing, and it can the good sealing of long term maintenance.Oil sealing (1) has following component: have with as the rack shaft (5) being attached body roughly arranged coaxial cylindrical portion (11) and be arranged on the metal ring (10) of flange part (12) of end of outer side of this cylindrical portion; Have and abut with rack shaft (5) and the sealing lip (22) that sealed object is sealed and be held in the elasticity system sealed department (20) of metal ring (10); To be inserted between the radially inner side end of flange part (12) and sealing lip (22) and to support the support ring (40) of sealing lip (22).The thickness of flange part (12) is 1.0 ~ 2.0mm.
Description
Technical field
The utility model relates to the oil sealing of the axle for vehicle, particularly for the oil sealing of the power steering gear of automobile.
Background technique
In the past, at automotive field, hydraulic power steerig portion being provided with steering shaft (input shaft) for transmitting the rotation from deflecting roller, being linked to the steering gear box (tooth bar & gear) of this axle, embed the oil hydraulic cylinder of rack shaft from the approximate horizontal configuration of steering gear box.In order to seal the oil be filled in steering gear box or oil hydraulic cylinder, oil sealing is installed in steering shaft and the linking department of steering gear box, the two end part of above-mentioned oil hydraulic cylinder by servosteering portion.
Such as, as shown in Fig. 5 (a), in oil sealing 100 in the past, rubber-like elastic materials sealing lip 105 is one-body molded at metal ring 103, thus forms sealing lip main body 102.Outside A ' the side of sealing lip 105 is provided with resin-made support ring 111, at this support ring 111 closer to outside A ' side, and in sealing lip main body 102, support ring holding member 112 is installed.During this is formed, support ring 111 is installed in the support ring assembly department 109 of sealing lip main body 102, then, support ring holding member 112 is arranged on support ring holding member assembly department 110.Support ring holding member 112 is the tabular of ring-type by the metal forming identical with metal ring 103, has the internal diameter less than the external diameter of support ring 111.
In the oil sealing 100 of formation described above, when sealing lip 105 is subject to external force from sealed object B ' side by wet goods, support ring 111 is from outside A ' side bearing sealing lip 105.Thus, sealing lip 105 is guaranteed and as the sealing between the rack shaft being attached body.
Model utility content
But, in oil sealing in the past, when the running because of servosteering portion from airtight object B ' and side is when applying external force to sealing lip 105, and external force is also applied to metal support ring holding member 112 by support ring 111.Now, the radially inner side end 112a of support ring holding member 112 likely externally A ' lateral bend and plastic deformation occurs, the reliability that sealing lip supports produces hidden danger, is enough to the good sealability of long term maintenance so not talkative.
In addition, from the viewpoint of the lubricant oil retentivity of sealing lip 105, rack shaft oil sealing in the past, at the plane of inclination 105c of the outside A ' side of sealing lip 105, circumferentially forms many projecting strip parts 120 (Fig. 5 (b)).The projecting strip part 120 being arranged on sealing lip usually becomes the shape of line symmetry substantially at the radial cross section of the oil sealing vertical line Y had with respect to the above-mentioned plane of inclination of its top 120a.In the above-described configuration, form groove portion 121 between contiguous 2 projecting strip parts 120,120, lubricant oil is temporarily accumulated in this groove portion, can keep lubricant oil thus with the plane of inclination 105c of sealing lip 105.But, in recent years, in order to the sealing that long term maintenance is good, require to improve sealing lip to the confining force of lubricant oil.
The purpose of this utility model is to provide can the oil sealing of the good sealing of long term maintenance.
To achieve these goals, the feature of oil sealing of the present utility model is, has following component: have with as be attached body axle arranged coaxial cylindrical portion and be arranged on the metal ring of flange part of outer side end of this cylindrical portion; Have and abut as the axle being attached body and the sealing lip that sealed object is sealed, and remaining on the elasticity system sealed department on described metal ring; Be inserted between the radially inner side end of described flange part and described sealing lip, for supporting the support ring of described sealing lip, the thickness of described flange part is 1.0 ~ 2.0mm.
In addition, described sealing lip have abut with described axle top, be arranged on this near top and be formed at the sealed object side at described top the 1st plane of inclination, be arranged on described near top and be formed at the 2nd plane of inclination of the outer side at described top, be formed at multiple projecting strip parts of the 2nd plane of inclination, described projecting strip part has the 3rd plane of inclination being formed at sealed object side and the 4th plane of inclination being formed at outer side, and described 3rd plane of inclination is larger relative to the gradient of described 2nd plane of inclination than the 4th plane of inclination relative to the gradient of described 2nd plane of inclination.
If described 3rd plane of inclination is θ 1 relative to the gradient of described 2nd plane of inclination, if when the 4th plane of inclination is θ 2 relative to the gradient of described 2nd plane of inclination, preferably meet 50 °≤θ 1≤90 ° and 20 °≤θ 2<50 °.
In addition, described multiple projecting strip part forms ring-type, preferably along the true dip direction gap-forming of described 2nd plane of inclination along the circumferencial direction of described oil sealing.
Above-mentioned oil sealing is preferably mounted at the axle being equipped on vehicle, is particularly preferred for the rack shaft in the servosteering portion of automobile.
According to the utility model, between the radially inner side end that the support ring supporting sealing lip inserts flange part and sealing lip, the thickness of this flange part is 1.0 ~ 2.0mm, so compared with the past, the thickness of flange part is large, has high rigidity.Thus, during use, even if apply larger external force from airtight object B side to sealing lip, pressure is applied to the inner end of flange part by support ring, also can suppress the distortion of the inner end of this flange part.Its result, reliably can support sealing lip, the sealing that energy long term maintenance is good.
The projecting strip part being formed at the 2nd plane of inclination of sealing lip has the 3rd plane of inclination being formed at sealed object side and the 4th plane of inclination being formed at outer side.Further, the 3rd plane of inclination is larger relative to the gradient of the 2nd plane of inclination than the 4th plane of inclination relative to the gradient of the 2nd plane of inclination.Because projecting strip part has above-mentioned shape, thus the lubricant oil be held between projecting strip part is difficult to flow to outside A side, can improve the 2nd plane of inclination to the confining force of lubricant oil.
And then multiple projecting strip part forms ring-type along the circumferencial direction of oil sealing, and is formed along the true dip direction of the 2nd plane of inclination with prescribed distance, so can improve the 2nd plane of inclination further to the confining force of lubricant oil.
By oil sealing of the present utility model being used for the rack shaft in the servosteering portion of automobile, even if apply high pressure by the fluid (fluid) in the oil hydraulic cylinder of embedding rack shaft to sealing lip, also can fluid reliably and chronically in sealing fluid cylinder pressure.
Accompanying drawing explanation
Fig. 1 is the figure of the formation in the servosteering portion schematically representing the oil sealing being provided with embodiment of the present utility model.
Fig. 2 is the sectional view of the formation of the oil sealing schematically representing Fig. 1.
Fig. 3 is the sectional view of the variation of the oil sealing representing Fig. 2.
Fig. 4 is the close-up sectional view of the formation of the projecting strip part representing the sealing lip being arranged on Fig. 3.
Fig. 5 is the sectional view of the formation of the oil sealing represented in the past, and (a) is overall diagram, and (b) is the partial enlarged drawing of the formation representing the projecting strip part being arranged on sealing lip.
Symbol description
1 oil sealing
1 ' oil sealing
2 deflecting rollers
3 input shafts
4 steering gear boxs
5 rack shafts
5a outer circumferential face
6 oil hydraulic cylinders
6a hydraulic chamber
6b hydraulic chamber
7 hydraulic control valves
7a oil exports road
7b oil exports road
10 metal rings
11 cylindrical portion
12 flange part
12a radially inner side end
13 planes
20 sealed departments
21 sealing base portions
21a otch
22 sealing lips
22a top
22b plane of inclination
22c plane of inclination
23 projecting strip parts
25 planes
30 garter springs
40 support rings
40a plane
40b plane
60 oil sealings
70 metal rings
71 cylindrical portion
72 flange part
73 projecting strip parts
73a top
73b plane of inclination
73c plane of inclination
74 groove portions
80 sealed departments
Embodiment
Below, mode of execution of the present utility model is described in detail with reference to accompanying drawing.
Oil sealing is used for various vehicle, particularly automobile, is installed on axle to seal the work wet goods (hereinafter referred to as sealed object) that is filled in servosteering portion.Should illustrate, in present embodiment, for hydraulic power steerig, portion is described, but oil sealing of the present utility model also can be applicable to other servosteering portions of electric hydraulic etc.
Servosteering portion as shown in Figure 1, have by input shaft 3 be connected to deflecting roller 2 steering gear box (tooth bar & gear) 4, embed the oil hydraulic cylinder 6 of rack shaft 5 from the approximate horizontal configuration of this steering gear box.Above steering gear box 4, be configured with hydraulic control valve 7, hydraulic control valve 7 exports road 7a, 7b by oil and is connected with hydraulic chamber 6a, 6b.The two end part of oil hydraulic cylinder 6 are configured with the oil sealing 1,1 ' that can abut with rack shaft 5 slidably.
Under the state not handling deflecting roller 2, the equalization of pressure in hydraulic chamber 6a, 6b, the pressure being applied to oil sealing 1,1 ' is equal.When deflecting roller 2 is handled (such as, rotate counterclockwise), working oil exports road 7b by oil and is imported into (being in hydraulic chamber 6b when rotating counterclockwise) in oil hydraulic cylinder 6, pushing is positioned at the flange (extruding when rotating counterclockwise) at the center of rack shaft 5 left, thus the steering force of assisted diversion wheel 2.Thus, when not handling deflecting roller 2, authorized pressure being applied to oil sealing 1,1 ', when handling deflecting roller 2, oil sealing 1,1 ' being applied than pressure large when not handling.
Fig. 2 is the sectional view of the formation of the oil sealing schematically representing present embodiment.Should illustrate, the oil sealing of Fig. 2 represents one example, and the formation of oil sealing of the present utility model is not limited to the formation of Fig. 2.In addition, in present embodiment, for convenience of explanation, to be configured in the position of the oil sealing 1 of oil hydraulic cylinder 6 one end for benchmark, in the axis of rack shaft 5, will than oil sealing 1 closer to the side of outside (steering gear box side) as " outside A side ", will than oil sealing 1 closer to the side of hydraulic chamber side (being filled in the working oil side of hydraulic chamber 6b) as " sealed object B side ".
Oil sealing 1 has metal ring 10 and is held in the elasticity system sealed department 20 of this metal ring, is embedded in the garter spring 30 of sealed department 20.Oil sealing 1 is roughly circular parts, and in its ring-type, space is inserted as when being attached the rack shaft 5 of body, and the inner peripheral portion of sealed department 20 is crimped on the outer circumferential face 5a of rack shaft 5.
Metal ring 10 has the flange part 12 with the rack shaft 5 roughly cylindrical portion 11 of arranged coaxial and the end of the one-body molded outside A side in this cylindrical portion.The parts of metal ring 10 to be radial longitudinal sections be roughly L font, sealed department 20 sulfuration adhesion is at this metal ring 10.
The thickness D1 of metal ring 10 is substantially certain, cylindrical portion 11 identical with the thickness of flange part 12 (D1).The thickness D1 being designed to metal ring 10 is large than ever, is preferably 1.0mm ~ 2.0mm.In addition, in Fig. 2, the thickness D1 of metal ring 10 is large than ever relative to the ratio (D1/D2) of the integral thickness D2 at the position of embedding cylindrical portion 11, such as, be about 0.5.Equally, the thickness D1 of metal ring 10 is also large than ever relative to the ratio (D1/D3) of the integral thickness D3 at the position of the oil sealing 1 of embedding flange part 12, such as, be about 0.3.Thus, by making the thickness D1 of metal ring 10 large than ever, the rigidity of metal ring 10 improves, and particularly by making the Thickness Ratio of flange part 12 in the past large, flange part 12 flexural rigidity in the axial direction improves.
Sealed department 20 has the sealing base portion 21 that cements in cylindrical portion 11 inner peripheral surface and extends internally further and the sealing lip 22 abutting with rack shaft 5 and sealed object sealed from sealing base portion inner peripheral portion.Sealed department 20 is obtained by elastomer formation, such as shaping by synthetic rubber such as NBR or HNBR.The inner peripheral portion of sealing base portion 21 is formed with otch 21a for keeping following support ring, and the space delimited by the radially inner side end 12a of this otch 21a and flange part 12 forms groove portion 23.
Sealing lip 22 is configured in closer to radially inner side and closer to sealed object B side compared with flange part 12 compared with cylindrical portion 11, and its radial cross-sectional shape is roughly V-shape.Specifically, sealing lip 22 have the outer circumferential face 5a being crimped on rack shaft 5 top 22a, be arranged on this near top and be formed at the sealed object B side of top 22a plane of inclination 22b (the 1st plane of inclination), to be arranged near the 22a of top and to be formed at the plane of inclination 22c (the 2nd plane of inclination) of the outside A side at this top.Rake 22c is formed in the opposition side of plane of inclination 22b relative to top 22a, is formed with the multiple projecting strip parts 23 for keeping lubricant oil at this plane of inclination 22c.
In addition, oil sealing 1 has the support ring 40 being inserted between the radially inner side end 12a of flange part 12 and sealing lip 22 and supporting sealing lip 22.Support ring 40 such as by metal or hard resin shaping, its radial cross-sectional shape is roughly trapezoidal.This support ring 40 is configured in the radially inner side of sealing base portion 21, and closer to outside A side compared with sealing lip 22, is embedded in the groove portion 24 of the radially inner side being arranged on sealing base portion 21.Now, the plane 40a of the outside A side of support ring 40 abuts with the plane 13 of the radially inner side end 12a of flange part 12, and the plane 40b of the sealed object B side of support ring 40 abuts with the plane 25 of the outside A side being arranged on sealing lip 22.
In the servosteering portion being provided with the oil sealing 1 formed thus, when deflecting roller 2 such as rotates counterclockwise, working oil is imported in hydraulic chamber 6b, and sealing lip 22 is subject to the external force from sealed object B side by working oil.Now, support ring 40 and flange part 12 cooperate to support sealing lip 22.Specifically, the external force from sealed object B side being applied to sealing lip 22 is delivered to the radially inner side end 12a of flange part 12 by support ring 40.Under the effect of this external force, produce stress by support ring 40 at the radially inner side end 12a of flange part 12, but due to flange part 12 flexural rigidity in the axial direction high, so radially inner side end 12a can not because of the generation of above-mentioned stress externally A lateral bend.Therefore, support ring 40 remain on vertically with bring into use before, namely assemble time substantially identical position, thus the long-term resiliently deformable suppressing sealing lip 22 externally A side.
Thus, according to the present embodiment, the support ring 40 owing to supporting sealing lip 22 is inserted between the radially inner side end 12a of flange part 12 and sealing lip 22, and the thickness of this flange part is 1.0 ~ 2.0mm, so compared with the past, the thickness of flange part is large, has high rigidity.Thus even if sealing lip 22 is subject to larger external force from airtight object B side in use, pressure is applied to flange part 12 by support ring 40, the distortion of the radially inner side end 12a of flange part 12 also can be suppressed.Particularly, even if because handling deflecting roller 2, sealing lip 22 is sharply subject to larger external force from sealed object B side, the distortion of radially inner side end 12a also can be suppressed, in addition, flange part 12 can be made to produce the reaction force be enough to external force resistance.Its result, can reliably support sealing lip 22, and the sealing that energy long term maintenance is good.
Particularly by oil sealing 1 of the present utility model being used for the rack shaft 5 in the servosteering portion of automobile, even if apply high pressure by the fluid (working oil) in the oil hydraulic cylinder 6 of embedding rack shaft 5 to oil sealing 1, also can fluid reliably and chronically in sealing fluid cylinder pressure 6.
Fig. 3 is the sectional view of the variation of the oil sealing representing Fig. 2, and Fig. 4 is the close-up sectional view of the formation of the projecting strip part representing the sealing lip being arranged at Fig. 3.Relative to the formation of Fig. 2, the metal ring thickness of the oil sealing of Fig. 3 is different from the shape of projecting strip part, so mark identical numbering to same section, different parts is below described.
In Fig. 3, oil sealing 60 has metal ring 70 and remains on the elasticity system sealed department 80 of this metal ring.Metal ring 70 has and the rack shaft 5 roughly cylindrical portion 71 of arranged coaxial, the integrated flange part 72 in end in the outside A side of this cylindrical portion, in this variation, the thickness D1 ' of metal ring 70 less than the thickness D1 of the metal ring 10 of Fig. 2 (D1<D1 ').
In addition, the multiple projecting strip parts 73 for keeping lubricant oil are formed with at the plane of inclination 22c of sealing lip 22.Multiple projecting strip part 73 forms ring-type along the circumferencial direction of oil sealing 60, is preferably arranged side by side with prescribed distance at the true dip direction of plane of inclination 22c.
Projecting strip part 73 as shown in Figure 4, has top 73a, is formed in compared with the 73a of top closer to the plane of inclination 73b (the 3rd plane of inclination) of sealed object B side, the plane of inclination 73c (the 4th plane of inclination) being formed at outside A side.This variation has following characteristics, and plane of inclination 73b is larger relative to the gradient of plane of inclination 22c than plane of inclination 73c relative to the gradient of plane of inclination 22c.Specifically, if plane of inclination 73b is θ 1 relative to the gradient of plane of inclination 22c, if when plane of inclination 73c is θ 2 relative to the gradient of plane of inclination 22c, meet 50 °≤θ 1≤90 °, and 20 °≤θ 2<50 °.The gradient θ 1 of plane of inclination 73b has above-mentioned relation with the gradient θ 2 of plane of inclination 73c, and the lubricant oil X be formed at thus in the groove portion 74 between projecting strip part 73,73 is difficult to flow to outside A side, and lubricant oil X is stably retained between projecting strip part 73,73.In addition, even if because of the to-and-fro motion of rack shaft 5, the working oil as sealed object is scraped from sealing lip, and arrive plane of inclination 22c, the lubricant oil X be present between projecting strip part 73,73 and also can not be pressed to outside A side by working oil, lubricant oil X is held stably.Therefore, compared with the projecting strip part in the past identical with gradient θ 2 with gradient θ 1, the confining force of plane of inclination 22c to lubricant oil X can be improved.
Above, describe the oil sealing of above-mentioned mode of execution, but the utility model is not limited to described mode of execution, various distortion and change can be carried out based on technological thought of the present utility model.
Such as, in the oil sealing 1 of Fig. 2, the thickness D1 defining metal ring 10 is 1.0mm ~ 2.0mm, and in the oil sealing 60 of Fig. 3, the gradient defining plane of inclination 73b is larger than the gradient of plane of inclination 73c, but be not limited thereto, certain oil sealing can have the flange part of thickness 1.0mm ~ 2.0mm and have the gradient of the plane of inclination the being formed at sealed object B side projecting strip part larger than the gradient of the plane of inclination being formed at outside A side.
In addition, in above-mentioned mode of execution, the cylindrical portion of metal ring is identical with the thickness of flange part, but is not limited thereto, and cylindrical portion can be different from the thickness of flange part.
In above-mentioned mode of execution, arrange multiple jut in the plane of inclination of sealing lip, multiple jut is arranged with prescribed distance, but is not limited thereto, and can arrange with different spacing.
In above-mentioned mode of execution, garter spring is set in oil sealing, but is not limited thereto, can not garter spring be set.
In addition, in above-mentioned mode of execution, dust excluder lips is not set at sealed department, but is not limited thereto, dust excluder lips can be set at the outer side of sealing lip.
Utilizability in industry
Oil sealing of the present utility model is preferred for the passing shaft of various vehicle, and the power steering gear oil sealing particularly as automobile is extremely useful.
Claims (7)
1. an oil sealing, is characterized in that, it has following component:
Metal ring, its have with as be attached body axle arranged coaxial cylindrical portion and be arranged on the flange part of end of outer side of this cylindrical portion;
Elasticity system sealed department, it has and abuts as the axle being attached body and sealing lip sealed object sealed, and described sealed department is held on described metal ring;
Support ring, it inserts between the radially inner side end of described flange part and described sealing lip, supports described sealing lip,
The thickness of described flange part is 1.0mm ~ 2.0mm.
2. oil sealing as claimed in claim 1, is characterized in that,
Described sealing lip has following component: the top abutted with described axle; Be arranged on the vicinity at this top and be formed at the 1st plane of inclination of the sealed object side at described top; Be arranged on the vicinity at described top and be formed at the 2nd plane of inclination of the outer side at described top; Be formed at multiple projecting strip parts of the 2nd plane of inclination,
Described projecting strip part has the 3rd plane of inclination being formed at sealed object side and the 4th plane of inclination being formed at outer side,
Described 3rd plane of inclination is larger relative to the gradient of described 2nd plane of inclination than described 4th plane of inclination relative to the gradient of described 2nd plane of inclination.
3. oil sealing as claimed in claim 2, it is characterized in that, when setting described 3rd plane of inclination relative to the gradient of described 2nd plane of inclination as θ 1, if when described 4th plane of inclination is θ 2 relative to the gradient of described 2nd plane of inclination, meet 50 °≤θ 1≤90 ° and 20 °≤θ 2<50 °.
4. oil sealing as claimed in claim 2, is characterized in that, described multiple projecting strip part forms ring-type along the circumferencial direction of described oil sealing.
5. oil sealing as claimed in claim 2, it is characterized in that, described multiple projecting strip part is along the true dip direction gap-forming of described 2nd plane of inclination.
6. oil sealing as claimed in claim 1, it is characterized in that, it is installed in axle mounted on a vehicle.
7. oil sealing as claimed in claim 6, it is characterized in that, it is for the rack shaft in servosteering portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-003179U | 2014-06-17 | ||
| JP2014003179U JP3193242U (en) | 2014-06-17 | 2014-06-17 | Oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204253867U true CN204253867U (en) | 2015-04-08 |
Family
ID=52958176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420562777.2U Expired - Fee Related CN204253867U (en) | 2014-06-17 | 2014-09-26 | Oil sealing |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3193242U (en) |
| CN (1) | CN204253867U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764030A (en) * | 2016-12-30 | 2017-05-31 | 浙江班尼戈流体控制有限公司 | A kind of direct-burried valve opening indicator device |
| CN110537044A (en) * | 2017-03-16 | 2019-12-03 | 特瑞堡密封系统德国有限公司 | Seal assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113574302A (en) * | 2019-05-20 | 2021-10-29 | Nok株式会社 | Sealing device |
-
2014
- 2014-06-17 JP JP2014003179U patent/JP3193242U/en active Active
- 2014-09-26 CN CN201420562777.2U patent/CN204253867U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764030A (en) * | 2016-12-30 | 2017-05-31 | 浙江班尼戈流体控制有限公司 | A kind of direct-burried valve opening indicator device |
| CN110537044A (en) * | 2017-03-16 | 2019-12-03 | 特瑞堡密封系统德国有限公司 | Seal assembly |
| US11920681B2 (en) | 2017-03-16 | 2024-03-05 | Trelleborg Sealing Solutions Germany Gmbh | Seal assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3193242U (en) | 2014-09-25 |
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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: 20150408 Termination date: 20170926 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |