CN101235866A - Dust-proof cover and assembling structure thereof - Google Patents
Dust-proof cover and assembling structure thereof Download PDFInfo
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- CN101235866A CN101235866A CNA2008100047619A CN200810004761A CN101235866A CN 101235866 A CN101235866 A CN 101235866A CN A2008100047619 A CNA2008100047619 A CN A2008100047619A CN 200810004761 A CN200810004761 A CN 200810004761A CN 101235866 A CN101235866 A CN 101235866A
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- proof cover
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Abstract
The invention provides a dust cover without the problem that lower part of the dust cover is diameter-enlarged and deformed due to expansion, tending to leading the dust to enter a sealing part of a shock absorber, and also without the issue that the lower part is clipped by a helical spring on account of the enlarged diameter and the deformation to be damaged. The lower end side of the dust cover (60) is downwardly inserted into inside of a reversely-conical discal lower spring seat (52) which supports the lower end of the helical spring (58), and forms an annular space between inner surface of the lower end and outer surface of an actuating cylinder (12) of the shock absorber (10); under above state, upper end part of the dust cover (60) is fixed at side of a piston rod (14), wherein an annular diameter-enlarging restriction ring (74) for avoiding the diameter enlarging of the lower end of the dust cover (60) is fixed at the lower end.
Description
Technical field
The present invention relates to a kind of vibration damper that is coated at suspension device for vehicle and prevent that dust from entering the cylinder-shaped dust-proof cover and the package assembly thereof slide part, that be made of rubber elastomer of piston rod.
Background technique
In the suspension arrangement of vehicle, enter the piston rod slide part of vibration damper in order to prevent dust, cylinder-shaped dust-proof cover is coated at vibration damper at the helical spring inner side.
Usually, this dust-proof cover is made of rubber elastomer.
This dust-proof cover is known variform, and corresponding therewith, the package assembly of dust-proof cover also has nothing in common with each other.
For example, in following patent documentation 1 (Japan real open flat 6-53838 communique), disclose such structure: the underpart of dust-proof cover is anchored on cylinder (comprising cylinder, oil hydraulic cylinder) outer surface with restraint zone, thus, the inner space of dust-proof cover is made confined space, prevent that dust from entering the sealed department of vibration damper.In such structure, be easy to generate the problem that foreign matters such as sand, grit enter the downside spring seat.And, stopped up drain opening owing to sneaking into foreign matter, be detained mud, sneaked into the oily such problem of sewage such as water in downside spring seat inside thereby also exist easily.
In this, the vehicle that travels on the road of not paving the way etc. for being everlasting day, sneaking into foreign matter etc. to spring seat can become big problem.Particularly be detained when sewage is arranged in that the downside spring seat is inner, may bring baneful influence to dust-proof cover etc., wish to be prevented the dust cover structure that foreign matter enters spring seat owing to these sewage.
Patent documentation 1: Japan opens flat 6-53838 communique in fact
Summary of the invention
The present invention is that background is made with above-mentioned situation, its purpose is to provide a kind of like this dust-proof cover and package assembly thereof: prevent to enter foreign matter, sewage etc. to spring seat, and, the hole enlargement distortion takes place owing to the sewage that enters into spring seat etc. expands in the underpart that can not produce dust-proof cover, thereby the easy problem that enters dust to the vibration damper sealed department, and, can not produce because the bottom hole enlargement is out of shape, by helical spring clamping and the such problem of damaged.
The present application people at first proposes a kind of dust-proof cover and package assembly thereof of structure shown in Figure 4.In Fig. 4, the 200th, the vibration damper in the candle formula independent suspension device, the 202nd, cylinder (comprising cylinder, oil hydraulic cylinder), the 204th, from the outstanding up piston rod of cylinder 202.
The upper end portion of piston rod 204 is by being that the supporting fitting seat (top fitting seat) 206 that main component constitutes is connected with vehicle-body outer panel 207 elasticity with the rubber elastomer.
208, the 210th, as metal upper spring seat, the lower spring cup of spring bracket, upper spring seat 208 is fixed on the piston rod 204, and lower spring cup 210 is fixed in the outer surface of cylinder 202.
And helical spring 212 inserts between upper spring seat 208 and the lower spring cup 210 in the outer fix of vibration damper 200.
218 are coated at vibration damper 200, be used to prevent dust enter the slide part of piston rod 204, by the cylinder-shaped dust-proof cover that rubber elastomer constitutes, its upper end portion is fixed on the piston rod 204 by upper spring seat 208.
This dust-proof cover 218 constitutes bellows form, its underpart internal diameter is greater than the external diameter of the cylinder 202 of vibration damper 200, forms with the inner space of cylindrical shell between the outer surface of the internal surface of underpart and cylinder 202, is the annulus 220 that the inner space of dust-proof cover 218 is communicated with.
At the state that this dust-proof cover 218 is assembled into vehicle, be under the common state (steady state), lower spring cup 210 inside of the plate-like that constitutes the back taper shape are stretched in the underpart of dust-proof cover 218, and this underpart contacts with the back taper shape internal surface of lower spring cup 210.
At this, the underpart of dust-proof cover 218 is the on-fixed state, is free state with respect to the cylinder 202 of vibration damper 200, therefore, when spring, if piston rod 204 is outstanding up from cylinder 202, then the underpart of this dust-proof cover 218 relatively moves with respect to cylinder 202 upward with piston rod 204.
Under the situation of the dust-proof cover 218 of this example, between its underpart and cylinder 202, constitute open space, but generally, the underpart of this dust-proof cover 218 is the internal surface state of contact with lower spring cup 210, has prevented that effectively dust from entering into its inner space, being the slide part of piston rod 204 from the outside by annulus 220.
But, because the running region difference of vehicle, the zone that the road that is dispersed with many roads in puddle that are mixed with oil or water logging road is also arranged, under the situation of travelling in such zone of being everlasting vehicle day, dust-proof cover 218 special its underparts absorb oil and produce expansion and hole enlargement, after the hole enlargement greater than the diameter of B size among initial Fig. 4, its result as can be known: the problem that produced A size among Fig. 4, promptly shortens to the above-below direction size A of the sealed department (sealed department is positioned at and covers 222 inner side) of the slide part of packed-piston bar 204 from the underpart of dust-proof cover 218.
And, if the A size shortens, then be underpart at first with the dust-proof cover 218 of the good contact condition of lower spring cup 210 internal surfaces, leave and rise from lower spring cup 210, its result produces easy sealed department to vibration damper 200 and enters dust, sewage, probably causes the problem of the premature breakage of sealed department.
In addition, the B size of Fig. 4 becomes big after the hole enlargement of underpart, and then when the stroke up and down of suspension arrangement, the bellows part that also might produce dust-proof cover 218 is produced the so dual problem of damage by helical spring 212 clampings.
Therefore, the inventor studies the reason that produces the problems referred to above, and inferring the lower expansion of dust-proof cover 218 and producing the hole enlargement distortion is owing to following reason.
Shown in Fig. 5 (B), on the lower spring cup 210 of the plate-like that constitutes the back taper shape, be provided with drain opening 224 at lower spring cup 210 to cylinder 202 fixing positions, but when abominable road etc. travels, sometimes this drain opening 224 because grit, sand etc. stop up by inaccessible, in this case, shown in Fig. 5 (A), be the lower spring cup 210 inner states that are detained the water that is mixed with oil of plate-like sometimes.
If such state, then the underpart of dust-proof cover 218 is the state of inside that always impregnated in the water that is mixed with oil, infers that this is to make the lower expansion of dust-proof cover 218 and main cause that the hole enlargement distortion takes place.
In order to solve such problem, the inventor proposes a kind of dust-proof cover of the present invention and package assembly thereof.And, technological scheme 1 relates to a kind of dust-proof cover, it is the cylinder-shaped member that constitutes by rubber elastomer, be coated at this vibration damper between vibration damper in suspension device for vehicle and the helical spring, it is characterized in that, this dust-proof cover is assembled under following state, promptly, the underpart of dust-proof cover is stretched into lower spring cup inside down, and between the cylinder outer surface of the internal surface of this underpart and above-mentioned vibration damper, form annulus with the inner barrel spatial communication, the piston rod side of this vibration damper is fixed in the upper end portion of dust-proof cover, above-mentioned underpart is relatively moved with respect to above-mentioned cylinder upward with this piston rod, above-mentioned lower spring cup is the plate-like of back taper shape, from following this helical spring of side bearing, be fixed with the hole enlargement distortion that is used to prevent this underpart in above-mentioned underpart, oil resistance height than dust-proof cover main body, the ring-type hole enlargement confinement ring that rigidity is high.
Technological scheme 2 is characterized in that in technological scheme 1 above-below direction of above-mentioned dust-proof cover is sized to, with this dust-proof cover under the state of vehicle assembling, above-mentioned underpart is contacted with the internal surface of the back taper shape of above-mentioned lower spring cup.
Technological scheme 3 is characterized in that in technological scheme 1 or 2 above-mentioned hole enlargement confinement ring is a metallic.
Technological scheme 4 is characterized in that above-mentioned hole enlargement confinement ring is fixed in above-mentioned underpart integratedly by vulcanizing bonding in each of technological scheme 1～3.
Technological scheme 5 is characterized in that in each of technological scheme 1～4, and above-mentioned underpart has and radially outward outstandingly is the lip part of ring-type, and is set as the state of above-mentioned hole enlargement confinement ring being imbedded this lip part.
Technological scheme 6 is in technological scheme 5, it is characterized in that, above-mentioned underpart contacts with the internal surface of the back taper shape of above-mentioned lower spring cup in the outer periphery portion of above-mentioned lip part, on the other hand, outer periphery at this lip part are formed with drain opening, by this drain opening, be the state of spatial communication of above-mentioned underpart and the axial both sides that are positioned at this lip part.
Technological scheme 7 relates to a kind of package assembly of dust-proof cover, this package assembly is to be coated at this vibration damper between the vibration damper of suspension device for vehicle and helical spring, the package assembly of the cylinder-shaped dust-proof cover that constitutes by rubber elastomer, it is characterized in that, to fix oil resistance height in the underpart than dust-proof cover main body, the above-mentioned dust-proof cover of the ring-type hole enlargement confinement ring that rigidity is high is assembled under following state, promptly, the underpart of this dust-proof cover is stretched into lower spring cup inside down, and (comprise cylinder at the internal surface of this underpart and the cylinder of above-mentioned vibration damper, oil hydraulic cylinder) annulus of formation and inner barrel spatial communication between the outer surface, the piston rod side of this vibration damper is fixed in the upper end portion of dust-proof cover, above-mentioned underpart is relatively moved with respect to above-mentioned cylinder upward with this piston rod, and above-mentioned lower spring cup is the plate-like of back taper shape, from following this helical spring of side bearing.
Above the present invention, fixed the hole enlargement confinement ring of the underpart hole enlargement distortion that is used to prevent the tubular dust-proof cover that constitutes by rubber elastomer, adopt the present invention, even the hydropexis of sneaking into oil is in the lower spring cup inside that constitutes the back taper shape, produce the situation in the water that the dust-proof cover bottom impregnated in contaminated product, also can eliminate the dust-proof cover bottom and produce the hole enlargement distortion owing to expanding, the above-below direction size of dust-proof cover shortens, leave the space that produces by its underpart upward from the internal surface of lower spring cup, sealed department to vibration damper enters dust easily, the problem that sewage is such, therefore, can eliminate effectively owing to enter dust, sewage and may cause the damaged such problem of sealed department.
In addition, also can prevent trouble before it happens, that is, can prevent that also because the hole enlargement of dust-proof cover bottom is out of shape, when the above-below direction stroke of suspension arrangement, so dual problem is damaged by the helical spring clamping in the bottom that produces dust-proof cover for following problem.
At this, the above-below direction size of dust-proof cover can be set at, under the state of vehicle assembling, make the underpart of dust-proof cover contact (technological scheme 2) with the internal surface of the back taper shape of lower spring cup.
In this case, though between the underpart of dust-proof cover and cylinder outer surface, form annulus, but generally speaking, contact with the internal surface of lower spring cup by the dust-proof cover underpart, can prevent effectively that dust, sewage etc. from entering into dust-proof cover inside, particularly vibration damper sealed department from the outside.
In the present invention, preferably making above-mentioned hole enlargement confinement ring is metallic (preferably iron) (technological scheme 3).
In this case, the effect that hole enlargement confinement ring performance is weighed down can more effectively prevent to produce the space between the underpart of dust-proof cover and lower spring cup internal surface.
In the present invention, preferably with above-mentioned hole enlargement confinement ring by vulcanizing bonding and be fixed in the underpart (technological scheme 4) of dust-proof cover integratedly.
If like this, different with hole enlargement confinement ring and dust-proof cover situation independently of one another, that in the operation different, this hole enlargement confinement ring is fixed on the dust-proof cover with the shaping of dust-proof cover, fixedly operation can be omitted independently, thereby the producibility of dust-proof cover can be improved.
In the present invention, the underpart of dust-proof cover is had radially outward outstandingly be the lip part of ring-type, and above-mentioned hole enlargement confinement ring is set as makes it imbed its lip part (technological scheme 5).
In the present invention, also form drain opening, thereby contact with the internal surface of lower spring cup and space about successfully connection is split into by this lip part at the lip part of dust-proof cover underpart.Therefore, even enter into situation in the lower spring cup at sewage etc., by this drain opening, these sewage are discharged to lower side space apace, and, discharge to the outside by the drain opening of being located at lower spring cup.Therefore, can prevent effectively that the dust-proof cover underpart is subjected to the influence of these sewage etc. and dilatancy because sewage etc. is stranded in the lip part upside of dust-proof cover underpart.
Technological scheme 7 relates to a kind of package assembly of dust-proof cover, adopt this package assembly, although the lower spring cup inside of plate-like is stretched in the underpart of dust-proof cover, even but be detained under the situation of the water that contaminated product is arranged in lower spring cup inside, also can prevent the hole enlargement distortion of underpart effectively, therefore, can eliminate well because the problems referred to above that the hole enlargement distortion of dust-proof cover underpart causes.
Description of drawings
Fig. 1 is the figure that expression is assembled in the dust-proof cover of an embodiment of the invention the state on the suspension arrangement.
Fig. 2 (A), (B) are the figure of major component of the dust-proof cover of this mode of execution.
Fig. 3 (A), (B) are the figure of major component of the dust-proof cover of other mode of executions of the present invention.
Fig. 4 is the figure that represents an example of dust-proof cover in the past.
Fig. 5 (A), (B) are the major component of enlarged view 4 and the figure that represented.
Embodiment
Then, describe embodiments of the present invention in detail based on accompanying drawing.
In Fig. 1, the 10th, the vibration damper of the primary component of formation vehicle candle formula independent suspension device, the 12nd, cylinder (comprising cylinder, oil hydraulic cylinder), the 14th, from the outstanding up piston rod of cylinder 12.
The 16th, the lid of cylinder 12 is inserted with the sealed department that is used for packed-piston bar 14 slide parts in the inboard of this lid 16.
At this, the diameter of lid 16 is bigger slightly than the diameter of cylinder 12.
The upper end portion of piston rod 14 by bearing 17 and the supporting fitting seat 18, can around axis rotatably elasticity be connected in vehicle-body outer panel 20.
On the other hand, the underpart of cylinder 12 be fixed in be connected with ball-joint by underarm, omit on the illustrated knuckle.
Supporting fitting seat 18 carries out vibration isolation between piston rod 14 and vehicle-body outer panel 20, and this supporting fitting seat 18 has the exterior part 22 of cone-shaped, the rubber elastomer 26 of inner body 24, connection exterior part 22 and the inner body 24 of the general conical shape of correspondence with it.
At this, rubber elastomer 26 is bonded as one with exterior part 22 and inner body 24 sulfurations.
And in this supporting fitting seat 18, exterior part 22 and inner body 24 are respectively to imbed the state setting of rubber elastomer 26 inside.
This supporting fitting seat 18 is without the non-bolt type fitting seat of bolton on vehicle-body outer panel 20, and this supporting fitting seat 18 is embedded the recess 28 that is formed on the vehicle-body outer panel 20 up from the below, should support fitting seat 18 like this and be assembled on the vehicle-body outer panel 20.
The 30th, bounce limiter constitutes by limit feature 32 with rubber limitation part 34 that limit feature 32 sulfuration is bonded as one, and this limit feature 32 is by nut 35, the 36 fastening outside threads that are fixed in piston rod 14 upper end portions.
That is, in this embodiment, piston rod 14 and upper spring seat 44 are separate and can distinguish relative rotation.
This upper spring seat 44 has recessed embedding part 48 at central part, and the upper end portion of the bounce limiter 50 that is made of the rubber elastomeric material embeds this recessed embedding part 48 up, and under chimeric status, such bounce limiter 50 is kept by upper spring seat 44.
When vehicle bounced, the underpart of bounce limiter 50 was connected to the upper surface of cylinder 12 and the pressure elasticity distortion takes place, thereby played the effect of the excess shrinkage displacement of restriction vibration damper 10.
The 52nd, with 44 one-tenth of the upper spring seats metallic lower spring cup of the plate-like of a pair of back taper shape up and down, its underpart has the fixing part 54 of tubular, and its upper end portion has the spring-loaded portion 56 of approximate horizontal, and its fixing part 54 is fixed in the outer surface of cylinder 12.
The 58th, in the outer fix of vibration damper 10, be inserted in the helical spring between these upper spring seats 44 and the lower spring cup 52, this helical spring upper end is connected to the spring-loaded portion 46 of upper spring seat 44 up by the lip part 62 of aftermentioned dust-proof cover, and its underpart is connected to the spring-loaded portion 56 of lower spring cup 52 down.
The 60th, the inner side of helical spring 58 be coated at vibration damper 12, by rubber elastomer (at this, rubber elastomer based on natural rubber) cylinder-shaped (cylindrical body shape) of Gou Chenging and integral body are the dust-proof cover of bellows form, its upper end has the annular flange portion 62 of radial outward, and its lip part state that following one moves more than 62 is fixed in piston rod 14 sides.
At length say, the lip part 62 of this dust-proof cover 60 by the upper end of the spring-loaded portion 46 of upper spring seat 44 and helical spring 58 under the state of above-below direction clamping, this dust-proof cover 60 is fixed on the upper spring seat 44, and this dust-proof cover 60 is fixed on the piston rod 14 by this upper spring seat 44.
At this, dust-proof cover 60 also has the function as the helical spring insulator concurrently, therefore, be located in by the lip part 62 that makes the upper end between the spring-loaded portion 46 of the upper end of helical spring 58 and upper spring seat 44, thereby between helical spring 58 and upper spring seat 44, carry out vibration isolation.
This dust-proof cover 60 comprise almost constitute its whole bellows portion 64, thereon the above-below direction of side position constitute rectilinear form roughly straight line shape portion (still, constitute back taper shape slightly up) 66, be connected with bellows portion 64 and in the straight line shape portion 70 of the inverted cone shape portion 68 of downside formation back taper shape slightly, the above-below direction that further is connected with inverted cone shape portion 68 downsides, and, be provided with above-mentioned lip part 62 in the upper end of straight line shape portion 66.
In addition, has radially outward outstanding annular flange portion 72 (with reference to Fig. 2) in the underpart of straight line shape portion 70.
In the present embodiment, with dust-proof cover 60 under the state of vehicle assembling, specifically be under the common state (steady state) after the assembling, the lower end side of dust-proof cover 60 stretches into lower spring cup 52 inside of the plate-like that constitutes the back taper shape down, and this underpart is contacted with the internal surface of back taper shape.
Say that at length dust-proof cover 60 is with the above-below direction size is set under above-mentioned common state, its underpart contacts with the internal surface of lower spring cup 52 length.
And at this moment, at above-below direction rubber-like dust-proof cover 60, especially under tight state of giving birth to elastic compression up and down, its underpart contacts with the internal surface of lower spring cup 52.
The underpart internal diameter of dust-proof cover 60 is a bit larger tham the external diameter of the cylinder 12 in the vibration damper 10, forms between the outer surface of the underpart of dust-proof cover 60 internal surface and cylinder 12 and the inner space of cylindrical shell, the annulus 75 that promptly is communicated with the inner space of dust-proof cover 60.
The underpart internal diameter of dust-proof cover 60 is more greater than the external diameter of above-mentioned lid 16.Therefore, with regard to size, the underpart of dust-proof cover 60 constitutes can be passed through to cover 16 size, but when vehicle driving, this underpart can be to the last side shifting of lid 16 by after covering 16.
As shown in Figure 2, in the underpart of dust-proof cover 60 and form the position of lip part 72, the state that the hole enlargement confinement ring 74 of iron (steel) is imbedded lip part 72 with a part is located at the underpart of dust-proof cover 60.This hole enlargement confinement ring 74 is fixed as one by vulcanizing bonding and lip part 72.
Because hole enlargement confinement ring 74 is metallic members, therefore, certainly have the high rigidity (and high oil resistance) that is higher than dust-proof cover main body (removing the part outside the hole enlargement confinement ring 74), and constitute, be embedded in the underpart of dust-proof cover 60 along whole full week along circumferentially continuous circular.
At this, the shape of cross section of hole enlargement confinement ring 74 is laterally long rectangle.
(is 4 positions at this) is provided with notch 76,78 to lip part 72 at circumferential a plurality of positions, in these notchs 76,78, makes the part of hole enlargement confinement ring 74 outer circumferential sides be projected into the outside.That is, in the present embodiment, utilize this notch 76,78 that drain opening is set, make sewage of entering into lip part 72 upsides etc. be discharged to the downside of lip part 72 apace, and be discharged to the outside by the drain opening of being located on the lower spring cup 52.
Like this, at lip part 72 notch 76,78 is set, make hole enlargement confinement ring 74 outer circumferential sides part at those notchs 76,78 expose a part, when such hole enlargement confinement ring 74 is bonded as one with the state of imbedding dust-proof cover 60 inside and dust-proof cover 60 sulfurations, can control its exposed portions serve with mould, it is supported on positioning states.
In addition, shown in Fig. 2 (A), hole enlargement confinement ring 74 is positioned at the position of more leaning on radial outside than the underpart internal surface of dust-proof cover 60.
Adopt such present embodiment, vehicle in the zone that has disperseed many puddles of sneaking into oil or in water logging the zone of a road part travel etc., the lower spring cup 52 inner water that contaminated product is arranged that are detained in the plate-like that constitutes the back taper shape, thus, even the lower end side of dust-proof cover 60 is the state that is impregnated in the water of contaminated product, also can utilize the effect of contraction of 74 pairs of dust-proof cover underparts of hole enlargement confinement ring and expand and hole enlargement takes place be out of shape owing to oil suction in the underpart that prevents dust-proof cover 60 well.
Therefore, adopt present embodiment, can eliminate since the lower expansion of dust-proof cover 60 cause hole enlargement be out of shape cause the above-below direction size of dust-proof cover 60 to shorten, the underpart of dust-proof cover 60 leaves upward and produces the gap herein from the internal surface of lower spring cup 52, enter dust, the such problem of sewage to the sealed department of vibration damper 10 easily by its gap, can eliminate entering dust, sewage and cause the damaged such problem of sealed department easily effectively.
In addition, also can prevent trouble before it happens for following problem, can prevent because the hole enlargement distortion takes place in the bottom of dust-proof cover 10, when the above-below direction stroke of suspension arrangement, the bottom of dust-proof cover 60 is damaged so dual problem and is taken place by helical spring 58 clampings.
In the present embodiment, because hole enlargement confinement ring 74 is a metallic, therefore, hole enlargement confinement ring 74 plays the effect of bob, can more effectively prevent to produce the gap between dust-proof cover 60 underparts and lower spring cup 52 internal surfaces.
In addition, hole enlargement confinement ring 74 is fixed as one by vulcanizing bonding and dust-proof cover underpart, therefore, can improve the manufacturing efficiency of dust-proof cover 60.
More than, told about embodiments of the present invention in detail, but this is an illustration.
For example, as shown in Figure 3, hole enlargement confinement ring 74 can be that shape of cross section is constituted the L word shape shown in Fig. 3 (A).Thus, can guarantee to increase the area of contact of hole enlargement confinement ring 74, can guarantee to utilize hole enlargement confinement ring 74 to prevent the effect of hole enlargement distortion for a long time, reliably owing to the lower expansion of dust-proof cover 60 with respect to lip part 72.In addition, in this case, can make horizontal part be exposed to the outside from the notch 76,78 that is formed at lip part 72.
Or shown in Fig. 3 (B), also shape of cross section can be constituted the long lengthwise rectangle of above-below direction.
In this case, shown in figure (B) (mouth), hole enlargement confinement ring 74 preferably is embedded in lip part 72 inside, but depends on the circumstances, as Fig. 3 (B) (ィ) shown in, also hole enlargement confinement ring 74 can be embedded in the position of more leaning on radially inner side than lip part 72.Under the situation shown in (ィ), has the advantage that forms the space that to guarantee to increase the drain opening that constitutes by notch 76,78.Under the situation shown in (mouth),, therefore, can more effectively bring into play the effect of utilizing hole enlargement confinement ring 74 to prevent hole enlargement distortion owing to the expansion of dust-proof cover 60 bottoms because hole enlargement confinement ring 74 is positioned at radially foreign side.In addition, under the situation of Fig. 3 (B) (mouth), the part of hole enlargement confinement ring 74 is exposed from notch 76,78.
In addition, in the above-described embodiment, hole enlargement confinement ring 74 is iron (steel), but this hole enlargement confinement ring 74 also can be made of other metals, or depend on the circumstances, also can be made of etc. resin and other material higher than oil resistance height, the rigidity of dust-proof cover main body, the present invention can constitute the form that has applied various changes in the scope that does not break away from its purport.
Claims (7)
1. dust-proof cover, it is the cylinder-shaped member that constitutes by rubber elastomer, be coated at this vibration damper between vibration damper in suspension device for vehicle and the helical spring, it is characterized in that, this dust-proof cover is assembled under following state, promptly, the underpart of dust-proof cover extend into lower spring cup inside down, and between the cylinder outer surface of the internal surface of this underpart and above-mentioned vibration damper, form annulus with the inner barrel spatial communication, the piston rod side of this vibration damper is fixed in the upper end portion of dust-proof cover, above-mentioned underpart is relatively moved with respect to above-mentioned cylinder upward with this piston rod, above-mentioned lower spring cup is the plate-like of back taper shape, from following this helical spring of side bearing
Be fixed with in above-mentioned underpart the hole enlargement distortion that is used to prevent this underpart, than the high ring-type hole enlargement confinement ring of oil resistance height, the rigidity of dust-proof cover main body.
2. dust-proof cover according to claim 1 is characterized in that the above-below direction of above-mentioned dust-proof cover is sized to, with this dust-proof cover under the state of vehicle assembling, above-mentioned underpart is contacted with the internal surface of the back taper shape of above-mentioned lower spring cup.
3. dust-proof cover according to claim 1 and 2 is characterized in that, above-mentioned hole enlargement confinement ring is a metallic.
4. dust-proof cover according to claim 1 and 2 is characterized in that, above-mentioned hole enlargement confinement ring is fixed as one with above-mentioned underpart by vulcanizing bonding.
5. dust-proof cover according to claim 1 and 2 is characterized in that, above-mentioned underpart has radially outward and outstandingly to be the lip part of ring-type, and is set as the state of above-mentioned hole enlargement confinement ring being imbedded this lip part.
6. dust-proof cover according to claim 5, it is characterized in that, above-mentioned underpart contacts with the internal surface of the back taper shape of above-mentioned lower spring cup in the outer periphery portion of above-mentioned lip part, on the other hand, outer periphery at this lip part are formed with drain opening, by this drain opening, be the state of spatial communication of above-mentioned underpart and the axial both sides that are positioned at this lip part.
7. the package assembly of a dust-proof cover, this package assembly are the package assemblies that is coated at cylinder-shaped dust-proof cover this vibration damper, that be made of rubber elastomer between the vibration damper of suspension device for vehicle and helical spring, it is characterized in that,
To fix oil resistance height in the underpart than dust-proof cover main body, the above-mentioned dust-proof cover of the ring-type hole enlargement confinement ring that rigidity is high is assembled under following state, promptly, the underpart of this dust-proof cover is stretched into lower spring cup inside down, and between the cylinder outer surface of the internal surface of this underpart and above-mentioned vibration damper, form annulus with the inner barrel spatial communication, the piston rod side of this vibration damper is fixed in the upper end portion of dust-proof cover, above-mentioned underpart is relatively moved with respect to above-mentioned cylinder upward with this piston rod, and above-mentioned lower spring cup is the plate-like of back taper shape, from following this helical spring of side bearing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007020176 | 2007-01-30 | ||
| JP2007020176A JP2008185155A (en) | 2007-01-30 | 2007-01-30 | Dust cover and its mounting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101235866A true CN101235866A (en) | 2008-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100047619A Pending CN101235866A (en) | 2007-01-30 | 2008-01-30 | Dust-proof cover and assembling structure thereof |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008185155A (en) |
| CN (1) | CN101235866A (en) |
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| CN105980732A (en) * | 2014-02-06 | 2016-09-28 | Ｋｙｂ株式会社 | Shock absorber |
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| CN108533661A (en) * | 2017-03-02 | 2018-09-14 | 株式会社万都 | A kind of integral type dust cover and damper |
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| CN109505903A (en) * | 2018-12-14 | 2019-03-22 | 深圳市注圣硅胶制品有限公司 | A kind of stretchable dust-proof aviation rubber component of compression |
| CN110094448A (en) * | 2018-01-29 | 2019-08-06 | 日立汽车系统株式会社 | Buffer |
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2007
- 2007-01-30 JP JP2007020176A patent/JP2008185155A/en active Pending
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2008
- 2008-01-30 CN CNA2008100047619A patent/CN101235866A/en active Pending
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| CN106475478B (en) * | 2016-10-18 | 2018-05-29 | 太原重工股份有限公司 | Expanding machine and its expanding head protective device |
| CN108533661A (en) * | 2017-03-02 | 2018-09-14 | 株式会社万都 | A kind of integral type dust cover and damper |
| CN110094448A (en) * | 2018-01-29 | 2019-08-06 | 日立汽车系统株式会社 | Buffer |
| CN110094448B (en) * | 2018-01-29 | 2023-02-28 | 日立安斯泰莫株式会社 | Buffer device |
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| CN108819211A (en) * | 2018-05-30 | 2018-11-16 | 苏州菲丽丝智能科技有限公司 | A kind of elasticity leather sheath expanding mechanism |
| CN109505903A (en) * | 2018-12-14 | 2019-03-22 | 深圳市注圣硅胶制品有限公司 | A kind of stretchable dust-proof aviation rubber component of compression |
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