CN101398081A - Dust cover for constant speed coupling - Google Patents
Dust cover for constant speed coupling Download PDFInfo
- Publication number
- CN101398081A CN101398081A CNA2008101682036A CN200810168203A CN101398081A CN 101398081 A CN101398081 A CN 101398081A CN A2008101682036 A CNA2008101682036 A CN A2008101682036A CN 200810168203 A CN200810168203 A CN 200810168203A CN 101398081 A CN101398081 A CN 101398081A
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- aforementioned
- big footpath
- boot
- constant velocity
- velocity joint
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- Diaphragms And Bellows (AREA)
Abstract
The subject of the invention is to provide an equal-speed coupling dust hood with excellent sealability. The equal-speed coupling dust hood is composed of the following components: a large diameter inosculating part (1); a small diameter inosculating part (2) which is configured separatedly with the large diameter inosculating part (1); and a snake abdomen part (3) which has an approximate cone shape and integratedly connects the large diameter inosculating part (1) and the small diameter inosculating part (2). An annular fastening connecting part (12) is formed on the periphery surface (11) of the large diameter inosculating part (1) and uses a clamper (5) for fastening connecting. The large diameter inosculating part (1) is divided into a front part (171) of snake abdomen part and a back part (172) at the back by a notch groove (13) which is formed in the direction from the fastening connecting part (12) to the inner side of diameter. A supporting part (6) which supports the large diameter inosculating part (1) in axial direction is integratedly formed with the front part (171). The supporting part (6) can also be set on the end plane (172a) of back part.
Description
Technical field
The present invention relates to a kind of boot for constant velocity joint, its coating is used for the constant speed ratio coupling of the transmission shaft of vehicle etc., prevents that the oiling agent of being enclosed from revealing or foreign matter is invaded from the outside.
Background technique
The coupling portion of constant speed ratio coupling is covered by the dust-proof cover of the snake abdomen shape of having been enclosed oiling agent, by stoping the intrusion of water or dust, thereby keeps the level and smooth rotation of wide-angle.This boot for constant velocity joint is synthetic resin systems such as rubber, by big footpath embedding part for example, constitute than the path embedding part of big footpath embedding part path and the snake belly that links big footpath embedding part and path embedding part.Big footpath embedding part is fixed on the outer circumferential face of the shell on the axle that is arranged at driving side or servo-actuated side by anchor clamps.On the driving side that the path embedding part utilizes anchor clamps to be fixed on swingably to keep in the enclosure or another axle of servo-actuated side.
Current, as shown in Figure 8, the outer circumferential face 11 of big footpath embedding part 1 has: secure engagement portion 12, and it utilizes anchor clamps to carry out secure engagement; And undercut groove 13, it forms from secure engagement portion 12 side direction in diameter.The inner peripheral surface 10 of big footpath embedding part 1 has a plurality of sealing flanges 14～16, and they form across predetermined distance in the axial direction, with outer circumferential face 411 Elastic Contact of shell 41.Undercut groove 13 is used to prevent the shrinkage cavity of sealing flange 14～16, and this shrinkage cavity is because big footpath embedding part 1 is thicker diametrically, thereby cause in the moulding aftershrinkage.
But big footpath embedding part 1 is because form undercut groove 13 at its axial substantial middle place, so be split into the front part 171 of snake belly 3 sides and the back quadrate part 172 at its rear.Front part 171 links with the thinner wall section of back quadrate part 172 by the bottom 132 of undercut groove 13.Therefore, if utilize the secure engagement portion 12 of the big footpath of anchor clamps 5 riveted joints embedding part 1, then the front part 171 of footpath embedding part 1 tilts to snake belly 3 side F greatly, or back quadrate part 172 tilted rearward.Thus, anchor clamps 5 secure engagement power of side direction in diameter is difficult to be passed to sealing flange 14～16, and the sealing of sealing flange 14～16 reduces.
Disclose a kind of method in patent documentation 1, the binding wall of undercut groove is crossed in its formation, prevents that the undercut groove side walls from tilting.
Patent documentation 1: the spy opens communique 2006-No. 97881
Summary of the invention
Problem of the present invention is to provide a kind of boot for constant velocity joint, and it utilizes and above-mentioned patent documentation diverse ways, makes the sealing excellence of sealing flange.
Solve the boot for constant velocity joint of the present invention of above-mentioned problem, constitute: first portion in big footpath by following part; Second portion, its diameter is littler than first portion in big footpath, with first part in this big footpath from and configuration coaxially; And the snake belly of circular cone shape roughly with stretchability, it links first portion and second portion integratedly, first portion in big footpath, the radial section of inner circumferential surface is non-circular, the radial section of its outer circumferential face is circular, has the thinner wall section of thin-walled alternately and than the heavy section of thinner wall section heavy wall, first portion in big footpath has: the secure engagement portion of ring-type on circumferentially, it is formed on the outer circumferential face of first portion in big footpath, utilizes anchor clamps to carry out secure engagement; Sealing flange, it forms across predetermined distance, in the axial direction with the outer circumferential face resilient engagement of component on the inner peripheral surface of first portion in big footpath; And undercut groove, it is from secure engagement portion side direction in diameter, at least be formed on the aforementioned heavy section, this speed shaft coupling dust plug is characterised in that, has the supporting portion of supporting in the axial direction at least one end face of first portion in its axial both ends of the surface in big footpath, the external diameter of the supporting portion on first end surface is 88～100% of first portion's external diameter, and the supporting portion since first end surface length vertically be boot for constant velocity joint total length 1.5～15%.
According to said structure, has the supporting portion of supporting first portion in the axial direction on first portion's at least one end face in its axial both ends of the surface.Therefore, even utilize anchor clamps side direction in diameter to tighten joint secure engagement portion, can prevent that also front part or the back quadrate part cut apart by undercut groove from tilting.Thus, the stress of side direction is passed to a plurality of sealing flanges equably in the diameter that is produced by anchor clamps, and a plurality of sealing flanges can be brought into play excellent sealing.
In addition, the external diameter of supporting portion is 88～100% of first portion's external diameter, and the supporting portion since first end surface length vertically be boot for constant velocity joint total length 1.5～15%.Because the supporting portion has above-mentioned relative size, so, tilt Yi Bian prevent aforementioned the 1st portion effectively on one side can suppress the weight increase of dust-proof cover.
Preferred described supporting portion is upwards a plurality of across being provided with at interval in week, and each supporting portion is configured in respectively on the position corresponding with aforementioned heavy section.The supporting portion also can form on the whole circumference of first end surface continuously, but according to light-weighted viewpoint, preferably partly is formed on the heavy section of easy run-off the straight.
Under situation about partly forming, the circumferential width of each supporting portion can be 2～20% of first portion's external diameter.
Here, in this manual, so-called " axially " be meant, utilizes anchor clamps and be fixed on the axial of first portion on the component and second portion.The interior side direction of diameter that so-called " side direction in the diameter " is meant this one, so-called " diameter lateral direction " is meant the diameter lateral direction of this one.
As implied above, according to boot for constant velocity joint of the present invention, can provide the boot for constant velocity joint of the sealing excellence of sealing flange.
Description of drawings
Fig. 1 is the oblique drawing that expression is fixed on the boot for constant velocity joint of present embodiment the method on the component.
Fig. 2 is the axial section of the boot for constant velocity joint of present embodiment.
Fig. 3 is the figure of expression from Y-Y section of Fig. 2 of snake abdomen direction observation.
Fig. 4 is the axial part sectioned view of big footpath embedding part of the boot for constant velocity joint of present embodiment.
Fig. 5 is the axial part sectioned view as the boot for constant velocity joint of variation.
Fig. 6 is the axial component sectional drawing as the boot for constant velocity joint of variation.
Fig. 7 is the explanatory drawing that the oiling agent of the boot for constant velocity joint of expression embodiment and comparative example is revealed the measurement result of time of origin.
Fig. 8 is the axial part sectioned view of the state on the component that existing boot for constant velocity joint is fixed on.
Embodiment
Below, with reference to Fig. 1～4 explanation an embodiment of the invention.Fig. 1 is the constant speed ratio coupling dust-proof cover of explanation present embodiment and the oblique drawing of the relation between the component.Fig. 2 is the axial section of the constant speed ratio coupling dust-proof cover of present embodiment.Fig. 3 is the figure of expression from Y-Y section of Fig. 2 of snake abdomen direction observation.Fig. 4 is the axial part sectioned view of state that the constant speed ratio coupling dust-proof cover of present embodiment and component is chimeric.In addition, in Fig. 1～4, for the part mark identical label identical with Fig. 8 with Fig. 8.
The boot for constant velocity joint 30 of present embodiment is made of following part as shown in Figure 1 and Figure 2: first portion in big footpath promptly big footpath embedding part 1; Second portion of path is path embedding part 2, and it disposes discretely with big footpath embedding part 1, has the diameter less than this big footpath embedding part 1; And the snake belly 3 of circular cone shape with stretchability roughly, it links big footpath embedding part 1 and path embedding part 2 integratedly.
Big footpath embedding part 1 is fixed on the outer circumferential face 411 of three-pronged shell 41.Radially protrude at 3 circumferential positions of three-pronged shell 41.Be fixed on the big footpath embedding part 1 on the shell of this shape, the radial section of inner circumferential surface 10 is non-circular along the shell profile, and the radial section of its outer circumferential face 11 is circular.Thus, in the embedding part 1 of big footpath, the part relative with the bump 418 of shell 41 becomes thinner wall section 18, and the part relative with the depressed part 419 of shell 41 becomes the heavy section 19 than thinner wall section 18 heavy walls.Heavy section 19 and thinner wall section 18 big footpath embedding part 1 circumferentially on form alternately.
In addition, on the inner peripheral surface 10 of big footpath embedding part 1, form a plurality of sealing flanges 14,15,16, they form across predetermined distance in the axial direction, with outer circumferential face 411 resilient engagement of shell 41.In addition, as long as sealing flange is arranged on more than or equal to 1 position, also can be shown in present embodiment more than or equal to 3 positions.
As shown in Figure 4, on the outer circumferential face 11 of big footpath embedding part 1, form secure engagement portion 12 by the ring-type of anchor clamps 5 secure engagement.Secure engagement portion 12 is the groove of the bigger general planar of width, and the width of the width of secure engagement portion 12 and anchor clamps 5 about equally.In the axial substantial middle portion of secure engagement portion 12, form the undercut groove 13 that side direction caves in significantly in diameter.The width of undercut groove 13 preferably from the bottom towards the opening periphery of secure engagement portion 12 and increase.Thus, when moulding, big footpath embedding part 1 is easy to molding from the mould.For example, the side wall surface of undercut groove 13 is preferably with respect to radially tilting to the mode that the diameter outside enlarges with 0 °～5 ° angle.Under the situation of 0 ° of less than, may reduce the liftability of big footpath embedding part 1.Surpassing under 5 ° the situation, the part that secure engagement portion contacts with anchor clamps diminishes, and the transmission from the secure engagement power of anchor clamps is reduced.Undercut groove 13 is because be formed on the substantial middle of secure engagement portion 12, so can transmit stress equably to sealing flange 14～16 integral body.
The whole week that undercut groove 13 is formed on big footpath embedding part 1 makes progress.Big footpath embedding part 1 utilizes this undercut groove 13 to be divided into an axial end (below be called front part) 171 of snake belly side and axial the other end at its rear (below be called the back quadrate part) 172.
In the boot for constant velocity joint 30 of present embodiment, on the front part 171 of big footpath embedding part 1, form the supporting portion 6 that is used for supporting vertically big footpath embedding part 1 with front part 171.Supporting portion 6 is arranged between the outer circumferential face of axle parallel portion 3a of the end face 171a of snake belly 3 sides of front part 171 and snake belly 3, and this parallel portion 3a extends in the axial direction along the inner circumference edge of big footpath embedding part 1.
In the present embodiment, the external diameter B of the supporting portion 6 on the front part end face 171a is 88～100% (0.88A ≦ B ≦ 1.0A) of the outer diameter A of big footpath embedding part 1.If because the not enough 0.88A of this external diameter B, then under will the situation of big footpath embedding part 1 by anchor clamps 5 secure engagement, front part 171 tilts to snake belly 3 directions sometimes, so not preferred.In addition, the big directly outer diameter A of embedding part 1 is the diameter of the groove bottom 12a of secure engagement portion 12.
In addition, simultaneously, supporting portion 6 begins in the axial direction length C from front part end face 171a, is 1.5～15% (0.015L ≦ C ≦ 0.15L) of the total length L of dust-proof cover 30 on the outer circumferential face of axle parallel portion 3a.If 1.5% of the total length L of the not enough dust-proof cover 30 of the length C of supporting portion 6 then can't effectively utilize supporting portion 6 and prevent that front part 171 from tilting.In addition, owing to surpassing under 15% the long situation, can hinder the level and smooth expanding-contracting action of snake belly 3, so not preferred.Be preferably 0.03L ≦ C ≦ 0.06L.
Supporting portion 6 also can upwards forming at big footpath embedding part 1 in whole week.But, if consider to cause the weight of dust-proof cover 30 to increase owing to form supporting portion 6, then preferred be arranged at least be easy to generate inclination more than or equal on 1 the heavy section 19.In these cases, making the circumferential width D of each supporting portion is 2～20% (0.02A ≦ D ≦ 0.2A) get final product of first portion's outer diameter A.If, improve so can't expect sealing because the not enough 0.02A of circumferential width D then can not obtain sufficient support effect.In addition, if, then when moulding, produce shrinkage cavity sometimes, so not preferred because width surpasses 0.2A.
Because the boot for constant velocity joint 30 of present embodiment, on the end face 171a of big directly snake belly 3 sides of embedding part 1, has supporting portion 6 as constituted above, even so secure engagement portion 12 by anchor clamps 5 secure engagement, front part 171 can not tilt to snake abdomen direction yet.Thus, the secure engagement power that is produced by anchor clamps 5 is passed to sealing flange 14～16 efficiently, and the sealing function of sealing flange improves.
Boot for constant velocity joint of the present invention is made of synthetic resin, for example can use TPE (polyethylene kind thermoplastic elastomer), TPO thermoplastic elastomer resin formings such as (TPO thermoplastic elastomers).
Boot for constant velocity joint 30 can utilize method moulding such as for example blow moulding and forming, injection-blow molding moulding.In addition, supporting portion 6 utilizes the forming surface moulding integratedly of mould when moulding.
The component of sealing flange 14～16 resilient engagement normally is fixed on the driving side of constant speed ratio coupling and the shell on the axle in the servo-actuated side, but also can be another axle in driving side and the servo-actuated side.In either case, can form the supporting portion on the end face by the part that wall thickness is thicker at least diametrically, thereby improve the sealing function of sealing flange effectively.
In addition, in the present embodiment, supporting portion 6 only forms on heavy section 19, can certainly form on thinner wall section 18.
In addition, in the present embodiment, formation is gone up in supporting portion 6 end surface 171a forwardly, but also can be as shown in Figure 5, and end surface 172a goes up and forms in the wings, also can form on two end face 171a, 172a.
In addition, in the present embodiment, as shown in Figure 4, section is that leg-of-mutton supporting portion 6 forms continuously with the snake belly side end face of front part 171 and the axle parallel portion of snake belly, but also can be as shown in Figure 6, form further with the continuous section of the rising portion 3b of snake belly be the supporting portion 61 of rectangle.By formation as noted above, can prevent more reliably that front part from tilting to the snake veutro, further improves the sealing of sealing flange.
Embodiment
For the boot for constant velocity joint (embodiment) that on heavy section, forms the supporting portion shown in Fig. 3,4, with the existing boot for constant velocity joint (comparative example) that does not have the supporting portion, measure oiling agent and time of revealing takes place and the comparison sealing from sealing flange.
(embodiment)
Present embodiment is, on the boot for constant velocity joint of total length L:92mm, outer diameter A: 85mm, 1 supporting portion is set respectively on the front part end face of each heavy section, its section is a triangle, the end face external diameter is B:85mm (1.0A), axial length is C:5mm (0.05L), and circumferential width is D:5mm.In addition, the groove width of undercut groove is 3mm, and the width of anchor clamps is 10mm, and the groove depth of the undercut groove in the heavy section is 7.8mm, and the angle of inclination of undercut groove side wall surface is 3 °, and the groove depth of the undercut groove in the thinner wall section is 0.6mm.In addition, on the inner peripheral surface of big footpath embedding part 1 with 3 sealing flanges of spaced set.Dust-proof cover forms with blow molding method.
(comparative example)
The boot for constant velocity joint that this comparative example is related does not form the supporting portion on the embedding part 1 of big footpath.Others are identical with embodiment.
(experimental technique and result)
Oiling agent was measured from the time that the sealing flange of the boot for constant velocity joint of embodiment and comparative example takes place to reveal.
The boot for constant velocity joint of embodiment and comparative example is assembled on the constant speed ratio coupling, after heat ageing, under high temperature, wide-angle, rotating speed: 400rpm, carries out endurance test, measure from beginning to test the oiling agent leakage time of origin that leaks to oiling agent.
Measurement result shown in Figure 7.As known in the figure, in an embodiment, do not reveal through finding oiling agent in 300 hours from beginning experiment yet.Relative therewith, in comparative example, from the experiment beginning oiling agent leakage took place in back 200 hours.Hence one can see that, and embodiment's dust-proof cover is compared with the dust-proof cover of comparative example, and sealing significantly improves.Think that this is that the fastening force with anchor clamps is passed to sealing flange efficiently owing to by the supporting portion is set in an embodiment, can prevent that big footpath embedding part 1 from enlarging laterally.
Relative therewith, in comparative example, if secure engagement portion 12 usefulness anchor clamps, 5 riveted joints of footpath embedding part 1 greatly, the axial front part 171 of then big footpath embedding part 1 is out of shape to axial front side.Therefore, think that the stress of side direction is difficult to be passed to sealing flange 14～16 in the diameter that is produced by anchor clamps 5, the sealing of sealing flange 14～16 reduces.
Claims (4)
1. boot for constant velocity joint, it is made of following parts: first portion in big footpath; Second portion, its diameter is littler than first portion in this big footpath, with first part in this big footpath from and configuration coaxially; And the snake belly of circular cone shape with stretchability roughly, it links aforementioned first portion and aforementioned second portion integratedly,
First portion in aforementioned big footpath, the radial section of inner circumferential surface is non-circular, the radial section of its outer circumferential face is circular, has the thinner wall section of thin-walled alternately and than the heavy section of this thinner wall section heavy wall on circumferentially,
First portion in aforementioned big footpath has: the secure engagement portion of ring-type, and it is formed on the outer circumferential face of first portion, carries out secure engagement by anchor clamps; Sealing flange, it forms across predetermined distance, in the axial direction with the outer circumferential face resilient engagement of component on the inner peripheral surface of first portion in aforementioned big footpath; And undercut groove, it is formed on the aforementioned heavy section at least from aforementioned secure engagement portion side direction in diameter,
This boot for constant velocity joint is characterised in that,
First portion in aforementioned big footpath has the supporting portion of supporting in the axial direction at least one end face in its axial both ends of the surface,
The external diameter of the supporting portion on the end face of aforementioned first portion is 88～100% of this first portion's external diameter, and, aforementioned supporting portion from the end face of aforementioned first portion begin vertically length be aforementioned boot for constant velocity joint total length 1.5～15%.
2. boot for constant velocity joint as claimed in claim 1 is characterized in that,
The circumferential width of aforementioned supporting portion is 2～20% of aforementioned first portion's external diameter.
3. boot for constant velocity joint as claimed in claim 1 is characterized in that,
Aforementioned supporting portion is upwards a plurality of across being provided with at interval in week, and each this support part is configured in respectively on the position corresponding with aforementioned heavy section.
4. boot for constant velocity joint as claimed in claim 3 is characterized in that,
The circumferential width of aforementioned supporting portion is 2～20% of aforementioned first portion's external diameter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007253448A JP2009085265A (en) | 2007-09-28 | 2007-09-28 | Boot for constant velocity joint |
| JP2007253448 | 2007-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101398081A true CN101398081A (en) | 2009-04-01 |
Family
ID=40516823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101682036A Pending CN101398081A (en) | 2007-09-28 | 2008-09-25 | Dust cover for constant speed coupling |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009085265A (en) |
| CN (1) | CN101398081A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636945A (en) * | 2012-04-01 | 2012-08-15 | 深圳雅图数字视频技术有限公司 | Projector and anti-dust device thereof |
| CN106215841A (en) * | 2016-10-11 | 2016-12-14 | 威海化工机械有限公司 | A kind of high viscosity fluid hybrid reactor |
| CN106423012A (en) * | 2016-10-11 | 2017-02-22 | 威海化工机械有限公司 | Fluid mixing reactor |
| WO2018130277A1 (en) * | 2017-01-11 | 2018-07-19 | Gkn Driveline International Gmbh | Bellows comprising at least one internal groove |
| US11333244B2 (en) | 2017-01-11 | 2022-05-17 | Gkn Driveline International Gmbh | Bellows with grooves |
-
2007
- 2007-09-28 JP JP2007253448A patent/JP2009085265A/en active Pending
-
2008
- 2008-09-25 CN CNA2008101682036A patent/CN101398081A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636945A (en) * | 2012-04-01 | 2012-08-15 | 深圳雅图数字视频技术有限公司 | Projector and anti-dust device thereof |
| CN102636945B (en) * | 2012-04-01 | 2014-08-06 | 深圳雅图数字视频技术有限公司 | Projector and anti-dust device thereof |
| CN106215841A (en) * | 2016-10-11 | 2016-12-14 | 威海化工机械有限公司 | A kind of high viscosity fluid hybrid reactor |
| CN106423012A (en) * | 2016-10-11 | 2017-02-22 | 威海化工机械有限公司 | Fluid mixing reactor |
| CN106423012B (en) * | 2016-10-11 | 2019-02-26 | 威海化工机械有限公司 | A kind of Reactive fluids mixing kettle |
| WO2018130277A1 (en) * | 2017-01-11 | 2018-07-19 | Gkn Driveline International Gmbh | Bellows comprising at least one internal groove |
| CN110431325A (en) * | 2017-01-11 | 2019-11-08 | Gkn动力传动国际有限公司 | Screwed pipe at least one inside groove |
| EP3568604B1 (en) | 2017-01-11 | 2020-07-15 | GKN Driveline International GmbH | Bellows comprising at least one internal groove |
| US11226011B2 (en) | 2017-01-11 | 2022-01-18 | Gkn Driveline International Gmbh | Bellows comprising at least one internal groove |
| US11333244B2 (en) | 2017-01-11 | 2022-05-17 | Gkn Driveline International Gmbh | Bellows with grooves |
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| Publication number | Publication date |
|---|---|
| JP2009085265A (en) | 2009-04-23 |
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Open date: 20090401 |