CN107035809A - Dust cover - Google Patents
Dust cover Download PDFInfo
- Publication number
- CN107035809A CN107035809A CN201611019796.0A CN201611019796A CN107035809A CN 107035809 A CN107035809 A CN 107035809A CN 201611019796 A CN201611019796 A CN 201611019796A CN 107035809 A CN107035809 A CN 107035809A
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- China
- Prior art keywords
- region
- valley
- corrugated part
- wall portion
- inclined wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/38—Covers for protection or appearance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/04—Bellows
- F16J3/041—Non-metallic bellows
- F16J3/043—Non-metallic bellows with particular means for limiting wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Diaphragms And Bellows (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The present invention provides a kind of dust cover for the new construction that body that can prevent corrugated part is bent.Corrugated part 12 has continuously sets region 12a and lower region 12b structure in intermediate region 12c axial both sides, composition valley 14a of the intermediate region 12c composition valley 14c inclined wall portion 16c angle of inclination than upper region 12a inclined wall portion 16a angle of inclination and lower region 12b composition valley 14b inclined wall portion 16b angle of inclination are small, and intermediate region 12c preferentially shrinks in the axial direction than upper region 12a and lower region 12b when being inputted with the compression on the axial direction for corrugated part 12.
Description
The cross reference of related application
This application claims the Japan for enjoying in entitled " the ダ ス ト カ バ ー (dust cover) " that submits on January 26th, 2016
Patent application JP2016-012114 priority, the entire disclosure of which is herein incorporated by reference.
Technical field
The present invention relates to being covered the piston rod of the damper such as the suspension fork mechanism by automobile is constituted, to prevent sand
The dust cover of the attachment of dirt and/or water etc..
Background technology
All the time, it is known to the dust cover for preventing that the foreign matters such as sand and dust and/or water from adhering to, for example, for following purpose
Deng and use the dust cover：By being covered on damper and by piston rod from the part that cylinder body is protruded, so that anti-
Only foreign matter adheres to piston rod.That such as disclosed in Japanese Unexamined Patent Publication 10-331897 publications (patent document 1) of dust cover
Sample, it is overall to turn into thin-walled tubular, and possess corrugated part formed by the valley that multiple ring-types protruded to periphery are continuously set, from
And can in the axial direction be stretched from the overhang of cylinder body according to piston rod.
However, in order to follow the larger flexible of damper, expect the corrugated part of dust cover dilatation stroke compared with
Greatly, axial maximum length when expecting elongation is longer and axial minimum length of when shrinking is shorter.
But, when attempting to ensure that the stroke of dilatation of corrugated part is larger, due to the thickness and/or shape of corrugated part
Error etc., easily act on transversal force in corrugated part when corrugated part compresses, the center section of corrugated part bends and bent to radial direction
Body bending (trunk song Ga り) as problem.Especially, in corrugated part by the case that resin is formed, and by the caoutchouc elasticity bodily form
Into situation compare, easily become big for the reaction force of compression, the transversal force of effect also easily becomes big, therefore easily occurs larger
Body bending.
Then, in the dust cover of patent document 1, corrugated part, which possesses, configures each multiple valleys with mutually different spacing
Big spacing portion and small spacing portion.Thus, by small spacing portion and big spacing portion periodically contraction distortion in compression, so that
The physical length of the part deformed in corrugated part shortens, and can expect to reduce body bending.
However, only by setting the different big spacing portion of spacing dimension from each other in corrugated part as described in Patent Document 1
With small spacing portion, and the big spacing portion and small spacing portion is periodically deformed, and be insufficient to.I.e., with relative to corrugated part
When overall less axial dimension sets small spacing portion, big spacing portion becomes long, is possible to easy when big spacing portion is deformed
Occurs the body bending of corrugated part.On the other hand, with relative to corrugated part, integrally larger axial dimension sets small spacing portion when,
The increasing number of the valley needed in the presence of the axial maximum length for the corrugated part needed for realizing, the axially minimum of corrugated part
This unfavorable condition of length.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 10-331897 publications
The content of the invention
The problem to be solved in the present invention
The present invention is completed by background of above mentioned problem, and it is curved that the problem of it is solved is to provide a kind of body that can prevent corrugated part
The dust cover of bent new construction.
Below, the mode of the invention for solving the problem and completing is recorded.Further, in each mode recorded below
Using inscape can use in any combination as far as possible.
I.e., the 1st aspect of the present invention be a kind of dust cover, it possess continuously be provided with the axial direction it is multiple convex to periphery
The corrugated part of the valley of the ring-type gone out, and the valley possesses with towards inner circumferential to axially external inclined one group of inclined wall
Portion, the dust cover is characterised by that the corrugated part, which has, continuously sets region and lower area in the axial both sides of intermediate region
The structure in domain, the angle of inclination of the inclined wall portion of the composition valley of the intermediate region is than described in the composition in region on this
The angle of inclination of the inclined wall portion of the composition at angle of inclination and the lower region valley of the inclined wall portion of valley
It is small, with to the corrugated part input axial direction compression when the intermediate region received in the axial direction than region on this and the lower area preference
Contracting.
According to the dust cover of the structure using first method of the present invention, the intermediate region set in the middle of the axial direction of corrugated part
In, by the way that the angle of inclination of the inclined wall portion of its valley is set into smaller, so as to be difficult to produce corrugated part in the middle region
Body bending during contraction distortion.
Further, intermediate region is shunk than upper region and lower area preference, so that the flexure for the intermediate region preferentially shunk
Deform that (body bending) is smaller, so that smaller with the angle of inclination in upper region and the connection end in lower region in intermediate region.Thus,
Upper region and lower region are not only limited inclination relative to axle vertical plane in the axial outer end by supportings such as dampers, from
Inclination relative to axle vertical plane also is limited at the connection end with intermediate region that the axial outer end of corrugated part is left, because
This, can reduce the body bending in upper region and lower region.
Moreover, preferentially being shunk by intermediate region, and make the reality of corrugated part when upper region and lower region are significantly shunk
Matter effective length is shortened, and generating body bending is difficult at upper region and lower region deformation, and the amount of body bending also reduces.
So, due to body bending can be reduced respectively in each region for the upper, middle and lower for constituting corrugated part, therefore can effectively it subtract
The overall body bending in ripplet portion, to reduce corrugated part to interference of miscellaneous part etc..
In addition, limiting the body bending that angle of inclination is formed at the connection end with intermediate region in upper region and lower region
Reduction effect also can effectively be played by the way that intermediate region to be arranged to the narrow range of corrugated part.Therefore, also can be by for example
The total length of upper region and lower region relative to corrugated part being made up of the larger valley of axial width dimension is with larger ratio
Set, and can ensure that the flexible stroke of corrugated part is larger.
The 2nd aspect of the present invention, in the dust cover that first method is recorded, the minimum diameter size of the corrugated part exists
Be mutually identical in the intermediate region, the upper region and the lower region, and the corrugated part maximum outside diameter size at this
Intermediate region, it is mutually identical in region and the lower region on this.
According to second method, the change without setting special thickness in corrugated part etc., it becomes possible to make inclining for inclined wall portion
The less intermediate region of rake angle is shunk relative to upper region and lower area preference, and obtains the reduction effect of body bending.
The 3rd aspect of the present invention, it is described in the intermediate region in the dust cover that first or second method are recorded
The angle of inclination of inclined wall portion is more than 25 ° and less than 35 °.
According to Third Way, the body for inhibiting intermediate region can be realized while the flexible stroke of intermediate region is ensured
The preferential contraction of bending.
The 4th aspect of the present invention, in the dust cover that the first to the 3rd either type is recorded, the institute in the upper region
State inclination angle of the angle of inclination of inclined wall portion for the inclined wall portion in more than 35 ° and less than 50 °, and the lower region
Spend for more than 35 ° and less than 50 °.
According to fourth way, while ensuring that flexible stroke is larger in upper region and lower region, stably produce
Region and the dilatation in lower region.
The 5th aspect of the present invention, in the dust cover that first to fourth either type is recorded, the structure of the intermediate region
Into including a valley.
According to the 5th mode, intermediate region is constituted by using the valley of minimum number, so as to larger ratio in ripple
Line portion sets upper region and lower region, and can significantly obtain the flexible stroke of corrugated part.
The 6th aspect of the present invention, the first to the 5th either type record dust cover in, the upper region it is described
Valley and the valley in the lower region are mutually identical.
According to the 6th mode, because each valley in upper region and lower region produces same diameter dimension in dilatation
Also can be with high-altitude under change, therefore situation about being limited in the space of inner circumferential and the space of periphery of corrugated part by miscellaneous part etc.
Between efficiency each valley is set, and can significantly obtain the flexible stroke of corrugated part.
The 7th aspect of the present invention, in the dust cover that the first to the 6th either type is recorded, in the periphery of the valley
End is formed with the small valley of the ring-type to periphery concavity opening.
According to the 7th mode, the axial chi under the elongation state of corrugated part can be larger obtained by the deformation of small valley
It is very little.As long as moreover, making the radial depth size of small valley smaller than the depth dimensions of the valley between valley adjacent in the axial direction, just
Axial dimension that can be under the contraction state by the coincidence at the inner circumferential end of small valley and the inner circumferential end of valley to prevent corrugated part
Become big, and can significantly obtain the flexible stroke of corrugated part.
The 8th aspect of the present invention, in the dust cover that the first to the 7th either type is recorded, the intermediate region is set
In by the middle body of corrugated part trisection in the axial direction.
According to eighth mode, by make the connection end to intermediate region in upper region and lower region be located at from upper region and under
The axial middle body for the corrugated part that the outer end up and down in region is left, and the body that can more effectively reduce upper region and lower region is curved
It is bent.
Invention effect
According to the present invention, due to angle of inclination the inclining than the inclined wall portion in upper region of the inclined wall portion in intermediate region
The angle of inclination of rake angle and the inclined wall portion in lower region is small, and intermediate region is received relative to upper region and lower area preference
Contracting, therefore the body bending of corrugated part can be reduced.
Brief description of the drawings
Fig. 1 is the longitudinal section of the dust cover as first embodiment of the invention.
Fig. 2 is the major part amplification view for the part A for representing Fig. 1.
Fig. 3 is the longitudinal section of dust cover shown in Fig. 1 to the installment state of vehicle.
Fig. 4 (a) and Fig. 4 (b) are the figures for the reduction effect for illustrating the body bending in dust cover involved in the present invention, respectively
Ground, Fig. 4 (a) represent the corrugated part of existing structure, and Fig. 4 (b) represents corrugated part involved in the present invention.
Fig. 5 is the longitudinal section of the dust cover as second embodiment of the present invention.
Fig. 6 is the longitudinal section of the dust cover as third embodiment of the present invention.
Symbol description
10：Dust cover；12、52、72：Corrugated part；12a、52a：Upper region；12b、52b：Lower region；12c、52c：It is middle
Region；14a~14h：Valley；16a~16h：Inclined wall portion；18a~18h：Small valley；62d：First area (upper region)；
62e：Second area (upper region, lower region)；62f：3rd region (lower region)；62g：First intermediate region (intermediate region)；
62h：Second intermediate region (intermediate region)
Embodiment
Below, embodiments of the present invention are explained with reference to.
The dust cover 10 of the first embodiment of the present invention is denoted as in Fig. 1.In the following description, above-below direction is former
Above-below direction of the spindle into i.e. Fig. 1 on then.
The overall barrel shape for making thin-walled of dust cover 10, is in the present embodiment resin-made.It is used as the shape of dust cover 10
Into material, for example, mixing is dispersed with the resistance to of the material of EP rubbers (EPDM) into the polypropylene (PP) as thermoplastic resin
Hou Xing, formability etc. are excellent, therefore are preferably used.Particularly, in the case where being formed by thermoplastic resin, such as poly- third
The polyolefin resins such as alkene, polyethylene, polyamide-based resin, polyvinyl chloride resin, polyester resin, polyurethane based resin,
Styrene resin, olefine kind resin etc. are any can be used.In addition, being used as the manufacturing process of dust cover 10, it is preferred to use
Blow molding, however, it is possible to using injection molded.
In addition, dust cover 10 possesses corrugated part 12.Corrugated part 12 has multiple valley 14a~14c edges protruded to periphery
The structure being axially continuously integrally formed up and down.Valley 14a~14c possesses with towards inner circumferential to axially external inclined
One group of inclined wall portion 16a~16c, 16a~16c as conical by its shape, and with section in the substantially V-shaped of traverse in complete cycle
It is upper continuously to turn into ring-type.Further, the corrugated part 12 of present embodiment towards periphery with being increasingly becoming thin-walled, the wall thickness it
Difference is realized by the blow molding of dust cover 12.
Further, in valley 14a~14c fore-end, it is formed with small valley 18a~18c to peripheral openings.Dell
Portion 18a~18c is formed at the outer peripheral portion of corrugated part 12, be in section the V-shaped of substantially traverse deployed to periphery whole
It is continuously provided on week.Further, compared with the valley formed between valley 14a~14c, 14a~14c adjacent in the axial direction,
Small valley 18a~18c narrow widths and bottom is shallow.
Herein, the composition of corrugated part 12 includes upper region 12a, lower region 12b and these three regions of intermediate region 12c.On
Region 12a continuously sets multiple valley 14a by one and constituted, also, lower region 12b continuously sets multiple peaks by one
Portion 14b and constitute, in the present embodiment, upper region 12a is made up of substantially 3.5 valley 14a, also, lower region 12b is by 5
Individual valley 14b is constituted.Further, in the present embodiment, region 12a valley 14a and the lower region 12b of composition valley in composition
14b is substantially mutually identical.
On the other hand, intermediate region 12c composition includes a valley 14c.Peaks of the valley 14c relative to upper region 12a
Broad-ruler portion 14a and lower region 12b valley 14b, its minimum diameter size r identical and axial with maximum outside diameter size R
Very little p is smaller than valley 14a, 14b axial width size P.Moreover, the composition valley 14c of the intermediate region 12c shown in Fig. 2
Inclined wall of inclined wall portion 16c, 16c relative to composition valley 14a of the tilt angle theta than upper region 12a of axle vertical plane
16a, 16a relative to axle vertical plane tilt angle alpha and lower region 12b composition valley 14b inclined wall portion 16b, 16b
(θ ＜ α, θ ＜ β) small relative to the inclination angle beta of axle vertical plane.
It is highly preferred that intermediate region 12c composition valley 14c inclined wall portion 16c, 16c is relative to axle vertical plane
Tilt angle theta is set as the scope of 25 ° ≦ θ≤35 °.In addition, inclined wall portion 16a, 16a for constituting valley 14a is hung down relative to axle
The tilt angle alpha of straight plane is preferably set to the scope of 35 ° ≦ α≤50 °, also, constitute valley 14b inclined wall portion 16b,
16b is preferably set to the scope of 35 ° ≦ β≤50 ° relative to the inclination angle beta of axle vertical plane.In the present embodiment, due to
Upper region 12a valley 14a and lower region 12b valley 14b are mutually identical, therefore composition valley 14a inclined wall portion 16a,
16a tilt angle alpha and constitute valley 14b inclined wall portion 16b, 16b inclination angle beta be mutually identical size (α=
β)。
Further, although intermediate region 12c is arranged at the axial centre of corrugated part 12, it is, however, preferable that middle area
Domain 12c is arranged at the middle body of the trisection in the axial direction of corrugated part 12.In brief, intermediate region 12c is arranged at from ripple
The axial two ends in line portion 12 position remote enough is more satisfactory, especially, be arranged in the body bending of corrugated part 12 significantly to
It is more satisfactory at the axially position in center of the prominent close corrugated part 12 in side.
Further, intermediate region 12c valley 14c formation small valley 18c relative to the valley 14a in upper region 12a
The small valley 18a formed the and small valley 18b of the valley 14b formation in lower region 12b, the depth dimensions of its radial direction is identical, and
And the width dimensions of axial direction are smaller.Thus, the wall portion of small valley 18c axial both sides is with than small valley 18a's and small valley 18b
The angle of inclination that the wall portion of axial both sides is small extends.
Moreover, upper region 12a is continuously provided with above intermediate region 12c axial direction, also, intermediate region 12c's
Lower region 12b, and upper region 12a lower end and lower region 12b upper end and intermediate region 12c mono- are continuously provided with axially below
Body is connected.
In addition, above the axial direction of corrugated part 12, continuously provided with upper mounting portion 26.Upper mounting portion 26 is generally substantially justified
Barrel shape, also, it is formed with slot 28 in axially intermediate portion.Slot 28 be in outer peripheral face opening in all-round scope
The groove of extension, and upper mounting portion 26 partly turns into path in the forming portion office of slot 28.
On the other hand, in corrugated part 12 axially below, it is formed with lower mounting portion 30.Lower mounting portion 30 is generally substantially justified
Barrel shape, and it is formed with the circumferential groove 32 in inner peripheral surface opening in the center section of axial direction.Further, in the circumferential of lower mounting portion 30
Multiple positions, are formed with wide diameter portion 34.Wide diameter portion 34 is prominent to periphery, and is in be increasingly becoming circumference towards prominent front end with section
Extend generally in straight line in the axial direction to the chevron of narrow width.The wide diameter portion 34 of present embodiment is substantially matched somebody with somebody at equal intervals in the circumferential
Put and be disposed radially around.
Moreover, as shown in figure 3, upper mounting portion 26 to be arranged on to supported to the upper end of helical spring 36 not shown
Spring bearing part on, also, by lower mounting portion 30 be arranged on damper 38 on so that by dust cover 10 be arranged on vehicle
On.
The structure of spring bearing part is not particularly limited, applicable various known features, therefore, bullet is eliminated here
The overall diagram of spring bearing part, still, for example, spring bearing part possesses the piston rod 44 (aftermentioned) for being installed on damper 38
To support the spring base (not shown) of the upper end of helical spring 36 and be configured at not scheming equally between helical spring 36 and spring base
The seat rubber shown.Moreover, the upper mounting portion by the way that the installation part 40 for being arranged at spring bearing part to be inserted in dust cover 10
26 slots 28 formed simultaneously engage, so that the upper end of dust cover 10 is arranged on spring bearing part.
Damper 38 has the structure that piston rod 44 stretches out upward from cylinder body 42, and the damper possesses composition cylinder body
The cylinder cap 46 of 42 upper ends.The locking teat 48 prominent to periphery is provided with the cylinder cap 46, by the way that locking teat 48 is embedded in
In the circumferential groove 32 of the formation of lower mounting portion 30 of dust cover 10, so that the bottom of dust cover 10 is arranged on cylinder body 42.
So, dust cover 10 is configured to upper end and is installed on piston rod 44 and bottom by spring bearing part to pacify
Make dust cover 10 loaded on cylinder body 42, and according to flexible (change of the piston rod 44 from the exposed length of cylinder body 42) of damper 38
Dilatation.
I.e., the corrugated part 12 of dust cover 10 by each valley 14a~14c deform and make inclined wall portion 16a~16c, 16a~
16c angle change, so as to stretch in the axial direction.Further, in the present embodiment, even if small valley 18a~18c becomes
Shape and the angle change for making axial both sides wall portion, can also produce the dilatation of corrugated part 12, it can be ensured that corrugated part 12
Dilatation amount (flexible stroke) is bigger.In addition, small valley 18a~18c inner peripheral end thereof and valley 14a~14c inner circumferential end
Portion, which is compared, is located at radial outside, is avoided that the inner peripheral end thereof of the small valley 18a~18c and valley 14a~14c inner peripheral end thereof exist
Overlapped on axial direction, therefore, the axial dimension (minimum axial direction size) under the maximum collapse state of corrugated part 12 diminishes.
In addition, in the dust cover 10 shown in Fig. 3 under the installment state of vehicle, corrugated part 12 is shared by car body weight
The contraction of damper 38 caused by bearing load and compared with the non-load input state of the monomer shown in Fig. 1 in the axial direction by
Compression.
As shown in Figure 3, in corrugated part 12, the compressive load for axial direction is inputted, and intermediate region 12c is than upper region
12a and lower region 12b preferentially shrink.I.e., intermediate region 12c valley 14c inclined wall portion 16c, 16c are constituted with constituting upper area
The domain 12a valley 14a lower region 12b of inclined wall portion 16a, 16a and composition valley 14b inclined wall portion 16b, 16b is compared
Angle of inclination is smaller, and thickness etc. is roughly the same, and the compressive load input for axial direction is easier to deform.Thus, in damper
During 38 contraction, in valley 14c foldings more preferential than valley 14a, 14b to prevent intermediate region 12c buckling (body bending)
In the state of, upper region 12a and lower region 12b further shrink.Especially, for larger compression, intermediate region 12c is than upper
Region 12a and lower region 12b are first contracted to maximum collapse state, and are substantially preventing intermediate region 12c flexible state
Upper region 12a and lower region 12b shrinks down.
By intermediate region 12c as described above it is more preferential than upper region 12a and lower region 12b shrink so that reduce or even
Prevent the deflection deformation (body bending) of the buckling shape of corrugated part 12.I.e., due to the state preferentially shunk in intermediate region 12c
Lower limitation intermediate region 12c deformation, therefore, the lower end for the upper region 12a that the constraint portions formed from damper 38 are left
And lower region 12b upper end is constrained by intermediate region 12c.Therefore, compared with allowing the existing structure of deformation of intermediate region, energy
Region 12a and the sideways deflection deformation amounts of lower region 12b in limitation, and the body bending of corrugated part 12 is diminished.
Especially, first it is compressed into maximum collapse state compared with upper region 12a and lower region 12b in intermediate region 12c
When, almost no longer allow intermediate region 12c continuation dilatation and make dimensionally stable, therefore, upper region 12a lower end is with
Region 12b upper end is effectively constrained by intermediate region 12c, and effectively prevents body from bending.
Further, it is considered that the reduction effect that the body of the dust cover 10 involved by such present embodiment is bent, is base
In the corrugated part 12 produced by the setting valley 14c shape intermediate region 12c different from upper region 12a and lower region 12b
The change of mode of texturing and play.Then, for existing structure as a comparison case corrugated part 100 mode of texturing and work
For the difference of the mode of texturing of the corrugated part 12 involved in the present invention of embodiment, reference summarily represents the corrugated part 100,12
Fig. 4 and be described below.Further, the corrugated part 100 of comparative example is used is continuously provided a setting in length range
The structure of the valley of shape, thereon the valley of region 100a and lower region 100b valley and intermediate region 100c be mutually identical.This
Outside, in Fig. 4, small valley 18a~18c is eliminated for the ease of observation.Further, in Fig. 4, deformed for ease of understanding
Mode, and the corrugated part 100,12 of the A-stage before contraction distortion is virtually illustrated with double dot dash line.
I.e., in the corrugated part 100 of the existing structure shown in Fig. 4 (a), when the compression stress in axial direction works, it is not only
Upper region 100a and lower region 100b, the intermediate region 100c being made up of the valley same with upper region 100a and lower region 100b
Also can be to side deflection deformation.Therefore, in corrugated part 100, body bending is also produced because of intermediate region 100c deflection deformation,
And intermediate region 100c axial two ends are significantly tilted relative to axle vertical plane, and make region 100a and lower region
Body bending caused by 100b deflection deformation is possible to become much larger.On the other hand, in the present embodiment shown in Fig. 4 (b)
In involved corrugated part 12, when the compression stress in axial direction works, intermediate region 12c is received up and down without significantly bending
Contracting, also, can suppress intermediate region 12c inclination of the axial two ends relative to axle vertical plane, thus by intermediate region 12c Lai
Each inclination of region 12a lower end and lower region 12b upper end in limitation.So, the corrugated part 12 involved by embodiment is to side
The deflection deformation amount d in face diminishes compared with the sideways deflection deformation amount D of the corrugated part 100 involved by comparative example.
So, in using dust cover 10 according to the structure of present embodiment, intermediate region 12c than upper region 12a and
Lower region 12b preferentially shrinks, and intermediate region 12c inclined wall portion 16c inclined wall of the tilt angle theta than upper region 12a
Portion 16a tilt angle alpha and lower region 12b inclined wall portion 16b inclination angle beta are small, so as to reduce upper region 12a and under
Body bending caused by region 12b deflection deformation.Moreover, intermediate region 12c is easily shunk with less reaction force,
Therefore, intermediate region 12c body can be also avoided to bend.
In addition, upper region 12a inclined wall portion 16a and lower region 12b inclined wall portion 16b, with inclining for intermediate region 12c
Skew wall portion 16c is compared, and it is bigger relative to the angle of inclination of axle vertical plane, therefore, in upper region 12a and lower region 12b,
It can ensure that axial length is longer by less valley 14a, 14b.Thus, in upper region 12a and lower region 12b, stretch
Axial maximum length when long is longer, and by inclined wall portion 16a, 16b to axial direction it is overlapping and set contraction when axle
Shortened to minimum length, larger flexible stroke can be realized.
Moreover, in the present embodiment, using the less valley of axial dimension for only setting a composition intermediate region 12c
14c structure, in corrugated part 12 on region 12a and lower region 12b large percentage, accordingly, it is capable to more effectively increase ripple
The flexible stroke in portion 12.
In addition, in the present embodiment, upper region 12a valley 14a and lower region 12b valley 14b are to be mutually identical
Shape, therefore, also can be most under situation about being limited in each space of the inner periphery and the outer periphery of corrugated part 12 by miscellaneous part etc.
Efficiently set upper region 12a valley 14a and lower region 12b valley 14b flexible stroke and/or deformation characteristic etc..
Further, since intermediate region 12c is configured relative to the entire axial length of corrugated part 12 in 1/3 region in center,
Therefore, the upper and lower side from the corrugated part 12 constrained by damper 38 is positioned away from, can be by than upper region 12a and lower region
The intermediate region 12c constraints that 12b is preferentially deformed, it may be advantageous to which performance is prevented caused by region 12a and lower region 12b flexure
Body bending effect.
In addition, by the way that intermediate region 12c composition valley 14c inclined wall 16c, 16c tilt angle theta are set as
The scope of 25 ° ≦ θ≤35 °, can easily produce the same of the deformation for being compressed axially input in the 12c of intermediate region
When, it is ensured that intermediate region 12c flexible stroke is larger.
Further, by the way that the tilt angle alpha of upper region 12a composition valley 14a inclined wall portion 16a, 16a is set as
The scope of 35 ° ≦ θ≤50 °, and the inclination angle beta of lower region 12b composition valley 14b inclined wall portion 16b, 16b is set
It is set to the scope of 35 ° ≦ θ≤50 °, can be while region 12a and lower region 12b flexible stroke be larger on this is ensured, surely
Surely region 12a and lower region 12b dilatation are produced, and is also avoided that region 12a's and lower region 12b is flexible
When inside/outside diameter size variable quantity become it is too much.
In Figure 5, the dust cover 50 as second embodiment of the present invention is illustrated.The dust cover 50 possesses corrugated part
52, the composition of corrugated part 52 includes upper region 52a, lower region 52b and intermediate region 52c.Further, in the following description, it is right
It is understood that and is omitted the description for the part substantially identical with first embodiment and position by marking same-sign.
More specifically, upper region 52a is roughly the same with the upper region 12a of first embodiment, using multiple valley 14a
The structure continuously set in the axial direction.On the other hand, lower region 52b valley 14b compared with the lower region 12b of first embodiment
Negligible amounts, the structure continuously set in the axial direction using three valleys 14b, 14b, 14b.
Intermediate region 52c uses the structure that multiple valley 14c are continuously set in the axial direction, in the present embodiment, uses
The structure that four valleys 14c, 14c, 14c, 14c are continuously set in the axial direction.In brief, the corrugated part 52 of present embodiment
Compared with the corrugated part 12 of first embodiment, intermediate region 52c large percentage, and lower region 52b ratio in the axial direction
It is smaller.
Dust cover 50 according to involved by such present embodiment, makes ripple by intermediate region 52c preferential contraction
The effective length in line portion 52 becomes shorter, therefore, is difficult to occur corrugated part 52 in upper region 52a and lower region 52b contraction
Body bending.Further, in its composition valley of the intermediate region 52c of broader scope setting of axial direction compared with first embodiment
14c inclined wall portion 16c tilt angle theta it is smaller and it is easy shrink, therefore, be also difficult to during 52c contraction send out in intermediate region
Raw body is bent.
In figure 6, the dust cover 60 as third embodiment of the present invention is illustrated.The dust cover 60 possesses corrugated part
62。
More specifically, corrugated part 62 possesses first area 62d, second area 62e and the 3rd region 62f, in the firstth area
The first intermediate region 62g is provided between domain 62d and second area 62e, and between second area 62e and the 3rd region 62f
Provided with the second intermediate region 62h.
First area 62d has the structure for continuously setting multiple valley 14d in the axial direction.Valley 14d and first is implemented
The valley 14a (14b) of mode is roughly the same, and possesses big with inclined wall portion 16a, 16a (16b, 16b) and small valley 18a (18b)
Cause mutually isostructural inclined wall portion 16d, 16d and small valley 18d.In addition, second area 62e has multiple valley 14e in axle
The structure continuously set upwards, valley 14e is roughly the same with valley 14d, and possesses and inclined wall portion 16d, 16d and small valley
Inclined wall portion 16e, 16e of 18d same general configurations and small valley 18e.In addition, the 3rd region 62f has multiple valley 14f
The structure continuously set in the axial direction, valley 14f is roughly the same with valley 14d, and possesses and inclined wall portion 16d, 16d and dell
Inclined wall portion 16f, 16f of portion's 18d same general configurations and small valley 18f.
On the other hand, the first intermediate region 62g composition includes a valley 14g.Valley 14g and first embodiment
Valley 14c is roughly the same, and possess with the inclined wall portion 16g of inclined wall portion 16c, 16c and small valley 18c same general configurations,
16g and small valley 18g.Second intermediate region 62h composition includes a valley 14h, valley 14h and the first intermediate region 62g
Valley 14g it is roughly the same, and possess the inclined wall portion with inclined wall portion 16c, 16c and small valley 18c same general configurations
16h, 16h and small valley 18h.
In addition, first area 62d is the upper region relative to the first intermediate region 62g, and second area 62e is relative
In the first intermediate region 62g lower region, the first intermediate region 62g inclined wall portion 16g tilt angle theta1Compare first area
62d inclined wall portion 16d tilt angle alpha1With second area 62e inclined wall portion 16e inclination angle beta1Any one is all small
(θ1＜ α1, θ1＜ β1)。
Further, second area 62e is the upper region relative to the second intermediate region 62h, and the 3rd region 62f is phase
For the second intermediate region 62h lower region, the second intermediate region 62h inclined wall portion 16h tilt angle theta2Than the secondth area
Domain 62e inclined wall portion 16e tilt angle alpha2(=β1) and the 3rd region 62f inclined wall portion 16f inclination angle beta2Appoint
One all small (θ2＜ α2=β1, θ2＜ β2).Further, second area 62e is lower region relative to the first intermediate region 62g, and
It is upper region relative to the second intermediate region 62h.
In addition, in the compression in the axial direction of corrugated part 62, the first intermediate region 62g is than first area 62d and the secondth area
Domain 62e preferably shrinks, and the second intermediate region 62h contractions more preferential than second area 62e and the 3rd region 62f.
In the dust cover 60 using the structure according to such present embodiment, with preventing involved by first embodiment
Dust hood 10 similarly, can reduce body bending during compression.
I.e., the first intermediate region 62g inclined wall portion 16g and the second intermediate region 62h inclined wall portion 16h and first~
3rd region 62d~62f inclined wall portion 16d~16f is smaller compared to angle of inclination, therefore, first, second intermediate region 62g,
62h is folded and is difficult to produce body bending glibly for the compression stress of axial direction.
In addition, in the first~the 3rd region 62d~62f contraction distortion, first area 62d lower end, second area
First, second intermediate region 62g, 62h constraint that 62e upper end and lower end and the 3rd region 62f upper end are preferentially shunk.Its
As a result, the first~the 3rd region 62d~sideways deflection deformation amounts of 62f are respectively smaller, and the body for reducing corrugated part 62 is curved
It is bent.
In the dust cover 60 of present embodiment, two positions in the middle of the axial direction of corrugated part 62 are provided with intermediate region
62g, 62h, therefore, are shortened by the intermediate region 62g, 62h the first~the 3rd region 62d~62f divided each axial length,
The sideways flexures of first~the 3rd region 62d~62f are respectively smaller.In addition, preferentially being received by intermediate region 62g, 62h
Contracting, and become shorter the effective length of corrugated part 62 in the first~the 3rd region 62d~62f contraction, accordingly, it is capable to reduce
The body bending of corrugated part 62.
If in addition, both first, second intermediate region 62g, 62h are arranged on corrugated part 62 is third in the axial direction
The middle body divided, then effectively can prevent the first~the 3rd by first, second intermediate region 62g, the 62h preferentially deformed
Region 62d~62f flexure.
Further, the first~the 3rd region 62d~62f valley 14d~14f can be mutually different shape and/or
Size, and valley 14d~14f inclined wall portion 16d~16f angle of inclination can also be different.In addition, first, second
Intermediate region 62g, 62h valley 14g, 14h can be mutually different shape and/or size, and the inclination of valley 14g, 14h
The angle of inclination of wall portion 16g, 16h can also be different.In addition, intermediate region may also set up in three positions of corrugated part with
On.
More than, embodiments of the present invention are described in detail, but the present invention is not limited to the specific of embodiment
Contents.For example, the multiple valleys for constituting upper region can not be whole identical valleys, can be by shape and/or size etc.
The valley of different multiple species combines to constitute upper region.This to lower region and intermediate region similarly.
In addition, quantity and/or shape, size of the specific valley in each region etc. are only to illustrate, corrugated part institute can be based on
Greatest axial length and minimum axial length etc. for needing and suitably change., can be with further, small valley is not essential in valley
Omit.
In addition, the entirety of inclined wall portion can not be tilted with the same angle of inclination, for example, such as Japanese Unexamined Patent Publication 2015-
Disclosed in No. 55298 publications like that, angle of inclination the inclining than the inner peripheral portion of inclined wall portion of the outer peripheral portion of inclined wall portion
Rake angle is small.In this case, the maximum tilt angle of the inclined wall portion of intermediate region is preferably than the inclined wall portion in upper region
And the minimum cant of the inclined wall portion in lower region is small.
In addition, inclined wall portion of the maximum tilt angle than upper region and lower region except the inclined wall portion of intermediate region
Outside the angle of inclination of inclined wall portion is small, can also make intermediate region inclined wall portion thickness ratio on region and lower region inclination
The thickness of wall portion is small etc., so that intermediate region is easily shunk than upper region and lower area preference.
Claims (8)
1. a kind of dust cover (10,50,60), it possesses the valley for being continuously provided with multiple ring-types protruded to periphery in the axial direction
The corrugated part (12,52,62) of (14a, 14b, 14c, 14d, 14e, 14f, 14g, 14h), and the valley (14a, 14b, 14c,
14d, 14e, 14f, 14g, 14h) possess with towards inner circumferential to axially external inclined one group of inclined wall portion (16a, 16b,
16c, 16d, 16e, 16f, 16g, 16h), the dust cover is characterised by,
The corrugated part (12,52,62) has continuously sets upper area in the axial both sides of intermediate region (12c, 52c, 62g, 62h)
Domain (12a, 52a, 62d, 62e) and the structure in lower region (12b, 52b, 62e, 62f), the intermediate region (12c, 52c, 62g,
The angle of inclination of the inclined wall portion (16c, 16g, 16h) of the composition valley (14c, 14g, 14h) 62h) is than on described
The inclined wall portion (16a, 16d, 16e) of the composition valley (14a, 14d, 14e) in region (12a, 52a, 62d, 62e)
The inclined wall of the composition valley (14b, 14e, 14f) in angle of inclination and the lower region (12b, 52b, 62e, 62f)
The angle of inclination in portion (16b, 16e, 16f) is small, in described when carrying out the compression of axial direction to the corrugated part (12,52,62)
Between region (12c, 52c, 62g, 62h) than the upper region (12a, 52a, 62d, 62e) and the lower region (12b, 52b, 62e,
62f) preferentially shrink in the axial direction.
2. dust cover (10,50,60) according to claim 1, wherein,
The minimum diameter size of the corrugated part (12,52,62) the intermediate region (12c, 52c, 62g, 62h), it is described on
It is mutually identical in region (12a, 52a, 62d, 62e) and the lower region (12b, 52b, 62e, 62f), and the corrugated part
The maximum outside diameter size of (12,52,62) the intermediate region (12c, 52c, 62g, 62h), the upper region (12a, 52a,
62d, 62e) and the lower region (12b, 52b, 62e, 62f) in be mutually identical.
3. dust cover (10,50,60) according to claim 1 or 2, wherein,
The angle of inclination of the inclined wall portion (16c, 16g, 16h) in the intermediate region (12c, 52c, 62g, 62h) is 25 °
Above and less than 35 °.
4. dust cover (10,50,60) according to any one of claim 1 to 3, wherein,
The angle of inclination of the inclined wall portion (16a, 16d, 16e) in the upper region (12a, 52a, 62d, 62e) be 35 ° with
It is upper and the inclined wall portion (16b, 16e, 16f) in less than 50 °, and the lower region (12b, 52b, 62e, 62f) to incline
Rake angle is more than 35 ° and less than 50 °.
5. dust cover (10,50,60) according to any one of claim 1 to 4, wherein,
The composition of the intermediate region (12c, 62g, 62h) includes a valley (14c, 14g, 14h).
6. dust cover (10,50,60) according to any one of claim 1 to 5, wherein,
The valley (14a, 14d, 14e) of the upper region (12a, 52a, 62d, 62e) and the lower region (12b, 52b,
62e, 62f) the valley (14b, 14e, 14f) be mutually identical.
7. dust cover (10,50,60) according to any one of claim 1 to 6, wherein,
It is formed with the peripheral end of the valley (14a, 14b, 14c, 14d, 14e, 14f, 14g, 14h) to periphery concavity opening
Ring-type small valley (18a, 18b, 18c, 18d, 18e, 18f, 18g, 18h).
8. dust cover (10,50,60) according to any one of claim 1 to 7, wherein,
The intermediate region (12c, 52c, 62g, 62h) is arranged at the corrugated part (12,52,62) trisection in the axial direction
Middle body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016012114A JP6714368B2 (en) | 2016-01-26 | 2016-01-26 | Dust cover |
| JP2016-012114 | 2016-01-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107035809A true CN107035809A (en) | 2017-08-11 |
| CN107035809B CN107035809B (en) | 2018-12-25 |
Family
ID=59295587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611019796.0A Active CN107035809B (en) | 2016-01-26 | 2016-11-17 | Dust cover |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6714368B2 (en) |
| CN (1) | CN107035809B (en) |
| DE (1) | DE102016010191A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7033457B2 (en) * | 2018-01-25 | 2022-03-10 | 三井化学株式会社 | Bellows-shaped molded product made of a thermoplastic elastomer composition |
| JP6930931B2 (en) * | 2018-01-25 | 2021-09-01 | 三井化学株式会社 | Bellows-shaped molded product made of a thermoplastic elastomer composition |
| JP7223369B2 (en) * | 2019-03-27 | 2023-02-16 | 株式会社Subaru | DUST COVER, SUSPENSION DEVICE, AND DUST COVER MANUFACTURING METHOD |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969542A (en) * | 1989-07-17 | 1990-11-13 | General Motors Corporation | Dust shield for a damper |
| JPH10267124A (en) * | 1997-03-24 | 1998-10-09 | Fukoku Bussan Kk | Bellows body |
| US20080258408A1 (en) * | 2007-03-29 | 2008-10-23 | Toyoda Gosei Co., Ltd. | Boot for constant-velocity universal joint and fixing structure for the same |
| JP2009162356A (en) * | 2008-01-09 | 2009-07-23 | Tein:Kk | Dust cover and shock absorber |
| CN202251634U (en) * | 2011-09-28 | 2012-05-30 | 安徽省宁国新鼎汽车零部件有限公司 | Dustproof cover of shock absorber |
| CN204344790U (en) * | 2014-12-14 | 2015-05-20 | 安徽省宁国新鼎汽车零部件有限公司 | A kind of automobile absorber dust-proof cover |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5954168A (en) | 1997-05-28 | 1999-09-21 | American Showa, Inc. | Dust cover for shock absorber and method of manufacturing the same |
| JP6207310B2 (en) | 2013-09-12 | 2017-10-04 | 住友理工株式会社 | Dust cover |
-
2016
- 2016-01-26 JP JP2016012114A patent/JP6714368B2/en active Active
- 2016-08-23 DE DE102016010191.1A patent/DE102016010191A1/en active Pending
- 2016-11-17 CN CN201611019796.0A patent/CN107035809B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969542A (en) * | 1989-07-17 | 1990-11-13 | General Motors Corporation | Dust shield for a damper |
| JPH10267124A (en) * | 1997-03-24 | 1998-10-09 | Fukoku Bussan Kk | Bellows body |
| US20080258408A1 (en) * | 2007-03-29 | 2008-10-23 | Toyoda Gosei Co., Ltd. | Boot for constant-velocity universal joint and fixing structure for the same |
| JP2009162356A (en) * | 2008-01-09 | 2009-07-23 | Tein:Kk | Dust cover and shock absorber |
| CN202251634U (en) * | 2011-09-28 | 2012-05-30 | 安徽省宁国新鼎汽车零部件有限公司 | Dustproof cover of shock absorber |
| CN204344790U (en) * | 2014-12-14 | 2015-05-20 | 安徽省宁国新鼎汽车零部件有限公司 | A kind of automobile absorber dust-proof cover |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016010191A1 (en) | 2017-07-27 |
| JP2017133550A (en) | 2017-08-03 |
| JP6714368B2 (en) | 2020-06-24 |
| CN107035809B (en) | 2018-12-25 |
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