CN100480074C - Collision stopper for suspension apparatus - Google Patents
Collision stopper for suspension apparatus Download PDFInfo
- Publication number
- CN100480074C CN100480074C CNB2005101339273A CN200510133927A CN100480074C CN 100480074 C CN100480074 C CN 100480074C CN B2005101339273 A CNB2005101339273 A CN B2005101339273A CN 200510133927 A CN200510133927 A CN 200510133927A CN 100480074 C CN100480074 C CN 100480074C
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- China
- Prior art keywords
- fitting portion
- bound stopper
- undergauge
- piston rod
- bumper
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- 239000000725 suspension Substances 0.000 title claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 64
- 230000037431 insertion Effects 0.000 claims abstract description 24
- 238000003780 insertion Methods 0.000 claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 241000269799 Perca fluviatilis Species 0.000 claims description 32
- 239000011347 resin Substances 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 9
- 230000001939 inductive effect Effects 0.000 claims description 9
- 230000004323 axial length Effects 0.000 claims description 6
- 150000001768 cations Chemical class 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000009499 grossing Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 12
- 229920002635 polyurethane Polymers 0.000 abstract description 4
- 239000004814 polyurethane Substances 0.000 abstract description 4
- 239000006096 absorbing agent Substances 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 230000037303 wrinkles Effects 0.000 description 10
- 229920001971 elastomer Polymers 0.000 description 9
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 230000005489 elastic deformation Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000013598 vector Substances 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
- Springs (AREA)
- Vibration Dampers (AREA)
Abstract
To provide a foamed polyurethane bound stopper for a suspension device, having no unpleasant abnormal sounds due to friction against a spring seat during stopper operation. The foamed polyurethane bound stopper 46 elastically abuts on a cylinder during bound to restrict the excessive contractive displacement of a shock absorber. Between a large-diameter fitting portion 60 at the upper end and an annular constriction portion 48 for giving axial compressive deformation capability thereto on the outer peripheral face of an insertion portion 80 which is in the condition of being inserted into a recessed fitting portion 44 of the spring seat 42 under the condition of compressive deformation during the bound of a vehicle, a diameter shrinking guide portion 82 is provided in the form of an approximately inverted taper with its outer diameter gradually smaller toward the upper side for guiding diameter shrinking deformation with the compressive deformation. An annular gap is formed in at least the insertion portion 80 between an inner peripheral face 72 of a center hole 47 and the piston rod to provide for diameter shrinking deformation.
Description
Technical field
The present invention relates to a kind ofly comprise the bound stopper (boundstopper) that employed tubular polyurathamc is made in bumper and the helical spring suspension device for vehicle particularly a kind of bound stopper that is characterised in that the technological means that is used to prevent abnormal sound as structural element.
Background technology
, comprising in bumper and the helical spring suspension device for vehicle all the time, using when vehicle jumps (バ ウ Application De) and the cylinder butt of bumper, the bound stopper of control bumper excess shrinkage displacement as structural element.
Introduced a kind of bound stopper in for example following patent documentation 1.
This bound stopper has the bound stopper of rubber manufacturing and the bound stopper that polyurathamc is made.Particularly when making bound stopper by the latter's polyurathamc, compare with the bound stopper of rubber manufacturing, having compressive deformation can be high, makes the characteristic that initial stage of time spent can deliquescing at limiting device.
This bound stopper monolithic molding is a tubular, usually just formed on a plurality of positions on the short transverse in the axial direction be used for respect to bound stopper whole and improve compressive deformation can the dark tapered portion of annular.
This bumper is chimeric to be assembled into following state: piston rod inserts in the centre hole of this bound stopper, and the big footpath fitting portion of upper end is embedded in the fitting portion of falling the cupule of the accessory that traveller bearing (strut mount) had, and described traveller bearing is connected piston rod elasticity on the car body usually.
At this moment, the accessory of traveller bearing has been implemented to clean and has been changed into tunicle as general surface treatment and handled, even when vehicle jumps, and the bound stopper compressive deformation, bound stopper produces friction with respect to described accessory, also is difficult to produce the big abnormal sound that becomes problem.
At this, considered on spring perch, to be provided with down the recessed fitting portion of cup-shaped in recent years as the spring perch that receives the coil spring upper end, with embedded state big footpath, the upper end of bound stopper fitting portion is assembled on this recessed fitting portion.
This spring perch is the important guard block on the vehicle; because it requires rust-preventing characteristic; implemented the cation application from the teeth outwards; the surface becomes the smooth surface of " smooth "; thereby, in bound stopper generation limiting device effect and during compressive deformation, with respect to spring perch; specifically produce friction, thereby have the problem that is easy to generate the abnormal sound of forming by stick slip (stick slip) sound with respect to falling the inner peripheral surface of cup-shaped recessed fitting portion.
Specifically, the big footpath fitting portion lower portion of bound stopper, promptly do under the time spent compressive deformation state at the performance limiting device, the outer peripheral face radius vector that is in the part (insertion section) of inserting the state in the recessed fitting portion of spring perch is to foreign side's bulging distortion, inner peripheral surface with respect to recessed fitting portion produces friction, produce offending abnormal sound by described friction, just the stick slip sound.
Patent documentation 1 spy opens flat 8-No. 42624 communiques
Summary of the invention
In view of the above problems, the present invention is proposed, the bound stopper that the purpose of this invention is to provide the polyurathamc system that a kind of draft hitch uses is done the time spent at the performance limiting device and can be prevented because of the generation with respect to the caused offending abnormal sound of friction of spring perch.
The bound stopper of technical scheme 1 (bound stopper), integral body forms tubular, the piston rod that constitutes the bumper of suspension device for vehicle leads to respect to its centre hole is slotting, and, the end forms big footpath fitting portion in the axial direction, by this big footpath fitting portion is embedded in the recessed fitting portion in the holding member of falling the cup-shaped that is fixed on this piston rod, and give prominence to and install towards the cylinder of this bumper from this holding member, it is characterized in that: from above-mentioned big footpath fitting portion predetermined distance and being positioned on the position in the above-mentioned recessed fitting portion outside of above-mentioned holding member at interval below axially, under this big footpath fitting portion, be formed on the ring-type tapered portion (drawing together れ portion) of outer peripheral face upper shed, and make the axial length of this big footpath fitting portion littler than the depth dimensions of this recessed fitting portion of this holding member, this big footpath fitting portion and this ring-type tapered portion are induced portion in the part axially as undergauge, the diameter that this undergauge is induced portion is littler than the diameter of the inner peripheral surface of this recessed fitting portion of this holding member, and have from this ring-type tapered portion to this big footpath fitting portion roughly back taper outer peripheral face of reducing gradually of diameter in the axial direction, and, the interior all sides and the outer circumferential side of inducing portion at this undergauge, induce at this undergauge the piston rod of portion and above-mentioned bumper and above-mentioned holding member recessed fitting portion radially form the gap between the opposite face.
Technical scheme 2 is bounds stopper of a kind of polyurethane system, be used for having bumper (shock absorber) and helical spring suspension device for vehicle as structural element, integral body forms tubular, the piston rod of bumper is inserted and is led in its centre hole, and chimericly be assembled into following state: the big footpath fitting portion of upper end is embedded in the fitting portion of falling the cupule that is formed on the spring perch, this spring perch bears above-mentioned helical spring upper end, when vehicle jumps, cylinder elasticity butt with this bumper, control the excess shrinkage displacement of this bumper, it is characterized in that: at the big footpath fitting portion of above-mentioned upper end and be used to give this bound stopper with axial compressive deformation can under the ring-type tapered portion between part, and become under the compressive deformation state when vehicle jumps on the outer peripheral face of insertion section of the state in the recessed fitting portion that inserts above-mentioned spring perch, be provided with undergauge and induce portion, the described undergauge portion of inducing has the roughly back taper that reduces gradually to top external diameter, and induce the necking deformation that is accompanied by above-mentioned compressive deformation, and, be formed for carrying out the annular spaces of above-mentioned necking deformation at least between the inner peripheral surface of the above-mentioned centre hole in above-mentioned insertion section and the above-mentioned piston rod.
Technical scheme 3 is characterized in that in technical scheme 1 or 2 described bounds stopper: the minimum outer diameter size that the undergauge of above-mentioned roughly back taper is induced portion is bigger than the minimum outer diameter size in the deep of above-mentioned ring-type tapered portion.
Technical scheme 4 is in technical scheme 1～3 in any described bound stopper, it is characterized in that: the radial depth of above-mentioned ring-type tapered portion is 3～10 millimeters, and it is 0.2～3.0 millimeter that the undergauge of above-mentioned roughly back taper is induced the minor diameter part of portion and the external diameter difference between the lower end maximum diameter portion.
Technical scheme 5 in any described bound stopper, is characterized in that in technical scheme 1～4: the outer peripheral face that the undergauge of above-mentioned roughly back taper is induced portion is with respect to the axioversion angle θ of center shaft
2Be 0＜θ
2＜30 degree, and than axially the axioversion angle of any dip plane, both sides is all little in the above-mentioned ring-type tapered portion.
Technical scheme 6 in any described bound stopper, is characterized in that in technical scheme 1～5: the inner peripheral surface of above-mentioned centre hole has the internal diameter size that can form annular spaces in whole altitude range and between the above-mentioned piston rod.
Technical scheme 7 in any described bound stopper, is characterized in that in technical scheme 1～6: the above-mentioned bumper in the above-mentioned draft hitch is to make above-mentioned piston rod center on this piston rod axle center bumper of form in relative rotation with respect to above-mentioned holding member.
In any described bound stopper, it is characterized in that: above-mentioned spring perch has been implemented cation coating, surface smoothing to technical scheme 8 from the teeth outwards in technical scheme 1～7.
Technical scheme 9 is in technical scheme 1～8 in any described bound stopper, it is characterized in that: the resin ring position is assembled in regularly on the outer peripheral portion of axial below of above-mentioned ring-type tapered portion, above-mentioned undergauge induces the outside dimension of minor diameter part in the portion bigger than the internal diameter size of this resin ring, and littler than the outside dimension of this resin ring.
As mentioned above, in the present invention, the outer peripheral face that is in the insertion section of the state in the recessed fitting portion that inserts holding member under the compressive deformation state of bound stopper (is positioned at the position of the axial below of fitting portion, the outer peripheral face of the part of extending to the below of the peristome of this recessed fitting portion) is provided with roughly the undergauge of back taper on and induces portion, and at least in this insertion section, between centre hole inner peripheral surface and piston rod, be formed for carrying out the annular spaces of necking deformation.
Bound stopper of the present invention, when performance limiting device effect and bound stopper compressive deformation, induce the effect of portion by undergauge, be in the insertion section of the state in the recessed fitting portion that inserts spring perch, particularly minor diameter part is to the centre hole side necking deformation, thus, suppress the outer peripheral face of insertion section in radially foreign side's bulging distortion.
Its result, even make time spent bound stopper compressive deformation at the performance limiting device, the outer peripheral face of above-mentioned insertion section does not produce friction with respect to the inner peripheral surface of the recessed fitting portion of spring perch yet, even or friction, friction under the contact force that neither be big, thereby, can prevent the generation of the unhappy abnormal sound that causes because of its friction well.
In the present invention, owing to the annular spaces that is formed for necking deformation at least between centre hole inner peripheral surface in this insertion section and the piston rod, thereby when the bound stopper compressive deformation, necking deformation portion can bring into play original function well.
In the prior art, the inner peripheral surface of the centre hole of bound stopper is chimeric with respect to piston rod with the butt state, even be provided with undergauge as described above and induce portion this moment, when the bound stopper compressive deformation, this undergauge induces portion to be out of shape along the undergauge direction well.In a word, be to install under the state that stoped by piston rod of the distortion in the undergauge direction.
In the present invention because and piston rod between form above-mentioned annular spaces, undergauge is induced portion, particularly minor diameter part can be well to the centre hole side necking deformation.The place that should pay special attention to is, the undergauge inductive site is in the top of above-mentioned tapered portion, has the outer peripheral face of back taper and is provided with.By adopting the outer peripheral face of back taper, to induce in the portion at undergauge, it causes maximum necking deformation in the upper end that outside dimension becomes minimum.Same in tapered portion on the other hand, cause the distortion of undergauge direction in the part of its outside dimension minimum.Thereby, undergauge induce portion the upper end and to its axially below at interval in the tapered portion of the position of predetermined distance (undergauge is induced the axial length of portion), can realize stably that elastic deformation with the undergauge direction disperses in the zone of suitable length in the axial direction.
Thereby, when elastic deformation takes place in bound stopper in the axial direction, and in the sufficient axial length zone of the part of coming in and going out with respect to the recessed fitting portion of holding member, induce the synergy of portion and tapered portion according to undergauge, can further alleviate effectively or the caused interference of necking deformation when avoiding, can prevent the unfavorable condition that abnormal sound etc. takes place effectively holding member by compressive deformation.
As mentioned above, owing to induce the back taper outer peripheral face in the portion and the synergy of tapered portion according to undergauge, strain concentrating in the time of can relaxing compressive deformation and stress concentration can be realized the durability and the withstand load of bound stopper.
And in the present invention, for example can advantageously be configured for keeping the holding member (technical scheme 2) of bound stopper upper end by the spring perch that the coil spring upper end is supported.
And in the present invention, preferred undergauge is induced the minimum outer diameter size big (technical scheme 3) than the deep of above-mentioned tapered portion of minimum outer diameter size in the portion, can avoid undergauge to induce strain and stress excessive in the portion to concentrate thus.Particularly buckle, preferably above necking deformation portion, formed big footpath fitting portion, reduce the rate of change of outside dimension of the boundary member of these necking deformation portions and fitting portion, the proof stress coefficient of concentration in order to guarantee durability and to prevent.
And in the present invention, being used to give bound stopper integral body is 3～10 millimeters with the radial depth of the tapered portion of the deformation energy of compression direction, relative therewith, preferred above-mentioned roughly back taper undergauge is induced the external diameter difference (technical scheme 4) in 0.2～3.0 millimeter scope between the maximum diameter portion of the minor diameter part of portion and lower end.
And in the present invention, preferably, roughly the back taper undergauge outer peripheral face of inducing portion is with respect to the axioversion angle θ of center shaft
2Be 0＜θ
2＜30 degree, and than the axial axioversion angle all little (technical scheme 5) of any dip plane, both sides in the above-mentioned tapered portion.Thereby, can guarantee that undergauge induces the axial length of portion, induce the synergy of portion and tapered portion according to undergauge, can stablize the necking deformation when realizing compressive deformation further.
Above-mentioned bound stopper centre hole is within it in the whole altitude range of side face, and piston rod between form annular spaces (technical scheme 6).
And, technical solution of the present invention 6 described bounds stopper preferably piston rod around the piston rod axle center with respect to the spring perch bound stopper (technical scheme 7) used of the draft hitch of form in relative rotation.
The inner peripheral surface of centre hole forms annular spaces in whole altitude range and between the piston rod, thus, at the draft hitch that is applicable to technical scheme 7 at that time, the inner peripheral surface that can prevent bound stopper well produces friction with respect to the piston rod that rotates, and prevents the generation by the caused abnormal sound of described friction.
And as mentioned above, the present invention has carried out particularly suitable (technical scheme 8) under the occasion of cation coating (カ チ オ ン Tu dress) and surface smoothing from the teeth outwards at spring perch.
And in the present invention, preferably, the resin ring position is assembled in regularly on the outer peripheral portion of axial below of above-mentioned tapered portion, above-mentioned undergauge induces the outside dimension of minor diameter part in the portion bigger than the internal diameter size of this resin ring, and than the outside dimension of this resin ring little (technical scheme 9).In the present invention, induce portion and tapered portion by being used in combination this resin ring with undergauge with above-mentioned feature, especially by adopting the resin ring of specific inside/outside diameter size, can further advantageously suppress the elastic deformation amount of outer peripheral portion by the resin ring, make the axial crushing deformation masterpiece be used for undergauge and induce portion and tapered portion.Thereby, can further effectively and stably produce the inwardly bulging distortion of side of radius vector.And the distortion rigidity of resin ring is as long as just can greatly than the distortion rigidity of the elastomeric material that constitutes the bound stopper main body.
Description of drawings
Fig. 1 is the figure that shows state on the draft hitch that the bound stopper of one embodiment of the present invention is installed in;
Fig. 2 is the transparent view of bound stopper among Fig. 1;
Fig. 3 is (A) longitudinal section in this bound stopper, (B) birds-eye view, (C) C-C cutaway view;
Fig. 4 is the Action Specification figure of this bound stopper;
Fig. 5 is the Action Specification figure different with Fig. 4 of this bound stopper;
Fig. 6 is the figure of comparative example of the present invention.
The specific embodiment
Hereinafter at length introduce embodiments of the present invention with reference to the accompanying drawings.
In Fig. 1,10 expressions constitute suspension device for vehicle, are the bumper of the staple of column support type draft hitch at this, 12 expression cylinders, the piston rod that 14 expressions project upwards from cylinder 12.
The upper end of piston rod 14 also can flexibly be connected on the body panels 18 around its axle center rotationally by bearing 15 and traveller bearing 16.
On the other hand, the bottom of cylinder 12 is fixed on the not shown steering swivel.
Thereby the bottom of cylinder 12, when handling, around to the upper end of ball and cocket joint and piston rod, specifically be the center of bearing 15 carry out the bonded assembly line and with the motion of wheel unitary rotation, move and carry out the position, described ball and cocket joint is connected with steering track rod steering swivel.
Just in the bumper 10, the upper end stationkeeping of piston rod 14, the bottom around the center of turn and the wheel rotational motion integratedly of wheel, and makes change in location when handling.
Above-mentioned traveller bearing 16 is parts of vibration isolation between piston rod 14 and body panels 18, has the interior accessory 22 of the outer accessory 20 of taper, cooresponding general conical and they are carried out bonded assembly rubber elastomer 24.
And in this traveller bearing (ス ト ラ Star ト マ ウ Application ト) 16, outer accessory 20 and interior accessory 22 are arranged to be embedded in respectively rubber elastomer 24 in-to-in states.
This traveller bearing 16 is to can't help the parts of the non-bolt type (ボ Le ト レ ス イ プ) of bolted connection on body panels 18, and the recessed institute 26 with respect to being formed on the body panels 18 upwards embeds from the below, is assembled in thus on the described body panels 18.
28 represent back the bounce-back limiting device, form by killer accessory 30 with its integrated vulcanizing bonded assembly rubber killer portion 32, in this killer accessory 30, are fastened on the outside thread of piston rod 14 upper ends by nut 34-1,34-2.
Above-mentioned bearing 15 have interior wheel (wheel gets on the right track) 36, foreign steamer (lower railway wheel) 38, ball between the two (
The Move ball) 40.Should in wheel 36 be fixed on the piston rod 14 and with its unitary rotation, and, foreign steamer 38 be fixed on the spring perch 42 and with its unitary rotation.
Just in this embodiment, piston rod 14 and spring perch 42 can relatively rotate respectively independently of each other.
For antirust, the spring perch 42 of metal manufacturing has been implemented the cation coating.The smooth surface that its surface glazes.
When bound stopper 46 jumps at vehicle, make its bottom 52 that elasticity of compression distortion take place with the top butt of cylinder 12, the excess shrinkage displacement of restriction bumper 10, this moment, bound stopper 46 can be by the polyurathamc manufacturing.
These bound stopper 46 integral body form tubular, have centre hole 47, and piston rod 14 is inserted in its centre hole 47.
On the outer peripheral face of bound stopper 46, formed annularly respectively up and down be used to give bound stopper 46 with compressive deformation can tapered portion 48,50.
Upside tapered portion 48 as shown in Figure 3, it attenuates degree of depth α in 3～10 millimeters scope.
And downside tapered portion 50 also has the identical degree of depth that attenuates.
Than this downside tapered portion 50 by under part for the limiting device effect initial stage by cover 53 with cylinder 12 butts and bottom 52 that elasticity of compression distortion takes place, on interior all sides of this bottom 52, formed other tapered portion 54 annularly with tapered portion 50 contraries.
Carried out plating on lid 53, its surface becomes smooth smooth surface.
Compare tapered portion 50 of described bottom 52, its external diameter becomes path by the part of upside, thereby bottom 52 whole easy deformation.
As shown in Figure 3, the upper end of bound stopper 46 is the fitting portion 60 in big footpath, and the fitting portion 60 in this big footpath up embeds in the above-mentioned recessed fitting portion 44 of spring perch 42 from the below, remains on this place with embedded state.
Specifically, the outer peripheral face 62 of the fitting portion 60 in big footpath and upper surface 64 respectively with the inner peripheral surface and upper bottom surface state of contact of recessed fitting portion 44 under, fitting portion 60 is embedded in the recessed fitting portion 44.
And these fitting portion 60 axial lengths can guaranteed effectively in the scope of the caused chimeric confining force of contrary cone-shaped of interior fitting portion 44, much smaller than the depth dimensions of interior fitting portion 44.Thereby, on the outer peripheral face of bound stopper 46 upper ends, in interior fitting portion 44, form stage portion on the depth direction centre portion, the top of this stage portion is the fitting portion 60 in big footpath, on the other hand, the below of this stage portion is as mentioned below, becomes undergauge and induces portion 82.This undergauge induces portion 82 to be formed with from recessed fitting portion 44 interior specified lengths of giving prominence to by the peristome of interior fitting portion 44 downwards.
And in the present embodiment, the fore-end diameter of the fitting portion 60 of bound stopper 46 upper ends diminishes a little, thereby, can improve the operability of the embedding operation of inside fitting portion 44, realize being embedded into reliably the end, depths.
Shown in Fig. 2 and 3, formed many places (being 3 places in the present embodiment) air flue 66 on this fitting portion 60 radially, it is used for when jumping the performance limiting device and does the time spent, and does the time spent removing this limiting device, and air is passed through between bound stopper 46 inside and outside.
In the present embodiment, bound stopper 46, its internal diameter are that the diameter of centre hole 47 is bigger than the external diameter of piston rod 14, be formed in the time of usually from its upper end in the length range till the lower end, and piston rod 14 between form the shape of annular gap.
And this centre hole 47 has to follow from the upper end and advances and the angle θ of hole enlargement to the lower end
1Conical in shape.
But this centre hole 47 both can have from the upper end to the shape of the continuous hole enlargement in lower end, also can have from the upper end to the shape of the interim hole enlargement in lower end, and also can be undemanding conical in shape, the whole or local vertically curved shape that forms.Or only being provided with towards the below inner face taper of hole enlargement gradually from the part of lower axial end peristome specified length (for example to part) as the confinement ring 58 of resin ring, axial upper portion herein also can be the interior all shapes than the linear (constant inner diameter size) of the internal diameter size of the big specified amount of outside dimension of piston rod 14 simultaneously.Thereby, can suppress buckling of end portion, particularly can avoid and cover the unstable elastic deformation of the bottom of 53 butts, can advantageously guarantee the overall volume of bound stopper 46.
And in this bound stopper 46, the inner peripheral surface 72 of the lower surface 65 of the outside face 62 of fitting portion 60 and upper surface 64, bottom 52 and outer peripheral face 70, centre hole 47, whole face become wrinkle (シ ボ) forming face 68 that is made of small concavo-convex group.
In the present embodiment, wrinkle depth just the degree of depth from the height of wrinkle projection 74 to wrinkle paddy portion 76 be 250 ± 50 μ m.And the quantity with the wrinkle projection 74 in every sq cm scope is in the high density more than 5.
The bound stopper 46 of present embodiment is when vehicle jumps, mainly be above the cylinder 12 of its bottom 52 and draft hitch 10, elasticity of compression distortion specifically takes place with lid 53 top butt, and the displacement of the excessive shrinkage direction of draft hitch 10 is controlled.
At this moment, bottom 52, not only lower surface 65 is by cover 53 and cylinder 12 butts, and, by axial crushing deformation, its outer peripheral face 70 also by cover 53 with the top butt of cylinder 12, this moment bottom 52 lower surface 65 and outer peripheral face 70 with respect to the relative friction of cylinder 12 generations.
And in the fitting portion 60, compressive deformation is followed in outer peripheral face 62 and upper surface 64, with respect to the inner peripheral surface of the recessed fitting portion 44 of spring perch 42 and upper bottom surface and produce friction.
Particularly when handling, piston rod 14 produces the relative motion that prizes direction (こ じ り direction) shown in Figure 4 with respect to bound stopper 46, this moment or because of so that input load when spring perch 42 and coil spring upper end are together relatively rotated, piston rod 14 contacts with centre hole 47 inner peripheral surfaces 72 of bound stopper 46, while or contact and rotate.At this moment, the inner peripheral surface 72 of bound stopper 46 produces friction with respect to piston rod 14.
In the present embodiment, because these faces that produce friction all are wrinkle forming faces 68, thereby can prevent the abnormal sound that causes by friction well.
In the present embodiment, in the effect of performance limiting device, during the distortion of bound stopper 46 elasticities of compression, the big footpath fitting portion 60 of upper end and upside ring-type tapered portion 48 in the bound stopper 46, just and the part between the tapered portion under the fitting portion 60 48, as shown in Figure 5, the almost whole state that is in the recessed fitting portion 44 that inserts spring perch 42, as shown in Figure 3, the outer peripheral face of this insertion section 80 is comprehensive, becomes along with upwards entering back taper (the angle θ that external diameter reduces gradually
2) undergauge induce portion 82.
Back taper lower end maximum diameter portion 84, the external diameter of the pars intermedia 86 between its external diameter and tapered portion 48 and 50 is identical.Thereby undergauge induces in the portion 82 external diameter of the minor diameter part 88 in upper end littler than the external diameter of pars intermedia 86.But the external diameter of this minor diameter part 88 is bigger than the external diameter of tapered portion 48.
The external diameter of pars intermedia 86 is 53 millimeters of φ, and is relative therewith, and the external diameter of minor diameter part 88 is 52 millimeters of φ.Just undergauge induces the external diameter of minor diameter part 88 in the portion 82 littler 1 millimeter than the external diameter of maximum diameter portion 84.
And the external diameter of tapered portion 48 is 40 millimeters of φ, and specifically, its degree of depth α that attenuates is 6.5 millimeters.
And, the angle of inclination that undergauge is induced the angle of taper of portion 82 and tapered portion 48 axial two lateral incline is because of the size of bound stopper and require characteristic different, though can suitably adjust, in general to induce in the portion 82 at undergauge, outer peripheral face is with respect to the axioversion angle θ of center shaft
2Be preferably 0＜θ
2＜30 degree, the best is 0＜θ
2＜15 degree.Meanwhile, in tapered portion, axially either side dip plane, both sides axioversion angle is preferably formed to such an extent that induce the angle of inclination of portion big than this undergauge.Thereby, can avoid inducing the excessive distortion of portion to concentrate to undergauge.
And, with respect to the outer peripheral portion of the axial direction of tapered portion 48 below and stationkeeping ground stack-mounted confinement ring 58, size is set as shown in the figure like that, and promptly undergauge induces in the portion 82 minor diameter part outside dimension bigger than this resin ring internal diameter size, and littler than this resin ring outside dimension.
This undergauge is induced portion 82, in performance limiting device effect, when elasticities of compression distortion takes place bound stopper 46, by the annular space between piston rod 14 and centre hole 47 inner peripheral surfaces 72 the particularly minor diameter part 88 in insertion section 80 is out of shape guiding on the undergauge direction.In the present embodiment, thus, when bound stopper 46 compressive deformations, can control insertion section 80 radius vectors effectively to foreign side's bulging distortion.
Fig. 5 is the view that shows this situation, as shown in Figure 5, insertion section 80 under the compressive deformation state of bound stopper 46 not especially radius vector thereby can prevent that this bulging distortion from causing insertion section 80 to produce friction with respect to the inner peripheral surface of the recessed fitting portion 44 of spring perch 42 to foreign side bulging distortion.
Fig. 6 is the view that is presented at as a comparative example when not forming this undergauge among the 80A of insertion section and inducing portion, in this comparative example, does not form the back taper undergauge and induce portion on the outside face of the insertion section of bound stopper 46A 80A, and its outer peripheral face is axially straight.
And bound stopper 46A is shown in Fig. 6 (A), and its top inner peripheral surface 72 is chimeric with respect to piston rod 14 with contact condition.
Thereby, among the bound stopper 46A as shown in Figure 6 of this comparative example, elasticity of compression distortion when axially taking place in bound stopper 46A bringing into play the limiting device effect, insertion section 80A is in radially foreign side's bulging, contact with the inner peripheral surface of spring perch 42 recessed fitting portions 44, produce friction based on this contact, produce the problem that causes abnormal sound because of this friction.
Yet in the present embodiment, as shown in Figure 5, insertion section 80 not bulgings distortion, thereby, owing to do not produce friction with respect to recessed fitting portion 44 inner peripheral surfaces of spring perch 42, thereby the problem of abnormal sound can not appear causing because of this friction.
In the present embodiment, owing to be formed for taking place the annular space of necking deformation between centre hole 47 inner peripheral surfaces 72 and piston rod 14, when bound stopper 46 compressive deformations, undergauge induces portion 82 can bring into play original function well.
In the present embodiment; because the inner peripheral surface 72 of centre hole 47 forms annular space in whole altitude range and between the piston rod 14, thereby can guarantee the slick and sly rotational motion of piston rod 14, simultaneously; when it rotates, can control the friction of bound stopper 46 inner peripheral surfaces 72.
Though above embodiments of the present invention are described in detail, these only are examples of the present invention.
For example the undergauge portion of inducing of insertion section outer peripheral face also can not be strict back taper, also can be general conical.Specifically, so long as, just also can not be strict reverse tapered shapes along with upwards entering the shape that diameter diminishes.
The present invention can constitute in the mode of carrying out various distortion in the scope that does not break away from its purport.
Claims (10)
1. bound stopper that draft hitch is used, integral body forms tubular, the piston rod that constitutes the bumper of suspension device for vehicle leads to respect to its centre hole is slotting, and, the end forms big footpath fitting portion in the axial direction, by this big footpath fitting portion is embedded in the recessed fitting portion in the holding member of falling the cup-shaped that is fixed on this piston rod, and give prominence to and install towards the cylinder of this bumper, it is characterized in that from this holding member:
From described big footpath fitting portion predetermined distance and being positioned on the position in the described recessed fitting portion outside of described holding member at interval below axially, under this big footpath fitting portion, be formed on the ring-type tapered portion of outer peripheral face upper shed, and make the axial length of this big footpath fitting portion littler than the depth dimensions of this recessed fitting portion of this holding member, this big footpath fitting portion and this ring-type tapered portion are induced portion in the part axially as undergauge, the diameter that this undergauge is induced portion is littler than the diameter of the inner peripheral surface of this recessed fitting portion of this holding member, and have from this ring-type tapered portion to this big footpath fitting portion outer peripheral face of the roughly back taper that reduces gradually of diameter in the axial direction, and, the interior all sides and the outer circumferential side of inducing portion at this undergauge, induce at this undergauge the piston rod of portion and described bumper and described holding member recessed fitting portion radially form the gap between the opposite face.
2. bound stopper that draft hitch is used, it is a kind of bound stopper of polyurathamc system, be used for having bumper and helical spring suspension device for vehicle as structural element, integral body forms tubular, the piston rod of bumper is inserted and is led in its centre hole, and chimericly be assembled into following state: the big footpath fitting portion of upper end is embedded in the fitting portion of falling the cupule that is formed on the spring perch, this spring perch bears described helical spring upper end, when vehicle jumps, cylinder elasticity butt with this bumper, limit the excess shrinkage displacement of this bumper, it is characterized in that:
At the big footpath fitting portion of described upper end and be used to give this bound stopper with axial compressive deformation can under the ring-type tapered portion between part, and become under the compressive deformation state when vehicle jumps on the outer peripheral face of insertion section of the state in the recessed fitting portion that inserts described spring perch, be provided with undergauge and induce portion, the described undergauge portion of inducing has the roughly back taper that reduces gradually to top external diameter, and induce the necking deformation that is accompanied by described compressive deformation, and, be formed for carrying out the annular spaces of described necking deformation at least between the inner peripheral surface of the described centre hole in described insertion section and the described piston rod.
3. the bound stopper that draft hitch as claimed in claim 1 or 2 is used is characterized in that: the minimum outer diameter size that the undergauge of described roughly back taper is induced portion is bigger than the minimum outer diameter size in the deep of described ring-type tapered portion.
4. the bound stopper that draft hitch as claimed in claim 1 or 2 is used, it is characterized in that: the radial depth of described ring-type tapered portion is 3～10 millimeters, and it is 0.2～3.0 millimeter that the undergauge of described roughly back taper is induced the minor diameter part of portion and the external diameter difference between the lower end maximum diameter portion.
5. the bound stopper that draft hitch as claimed in claim 1 or 2 is used is characterized in that: the outer peripheral face that the undergauge of described roughly back taper is induced portion is with respect to the axioversion angle θ of center shaft
2Be 0＜θ
2＜30 degree, and than axially the axioversion angle of any dip plane, both sides is all little in the described ring-type tapered portion.
6. the bound stopper that draft hitch as claimed in claim 1 or 2 is used is characterized in that: the inner peripheral surface of described centre hole has the internal diameter size that can form annular spaces in whole altitude range and between the described piston rod.
7. the bound stopper that draft hitch as claimed in claim 1 or 2 is used is characterized in that: the described bumper in the described draft hitch is to make described piston rod center on this piston rod axle center bumper of form in relative rotation with respect to described holding member.
8. the bound stopper that draft hitch as claimed in claim 2 is used is characterized in that: described spring perch has been implemented cation coating, surface smoothing from the teeth outwards.
9. the bound stopper that draft hitch as claimed in claim 1 or 2 is used, it is characterized in that: the resin ring position is assembled in regularly on the outer peripheral portion of axial below of described ring-type tapered portion, described undergauge induces the outside dimension of minor diameter part in the portion bigger than the internal diameter size of this resin ring, and littler than the outside dimension of this resin ring.
10. the bound stopper that draft hitch as claimed in claim 1 or 2 is used, it is characterized in that: described bound stopper performance limiting device effect and when compressive deformation takes place, because the effect that described undergauge is induced portion, will become the outer peripheral face generation necking deformation of the insertion section of the state in the described recessed fitting portion that inserts spring perch, not produce friction with the inner peripheral surface of this recessed fitting portion relatively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004366710 | 2004-12-17 | ||
| JP2004366710A JP4362439B2 (en) | 2004-12-17 | 2004-12-17 | Bound stopper for suspension device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1789028A CN1789028A (en) | 2006-06-21 |
| CN100480074C true CN100480074C (en) | 2009-04-22 |
Family
ID=36671356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101339273A Expired - Fee Related CN100480074C (en) | 2004-12-17 | 2005-12-19 | Collision stopper for suspension apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4362439B2 (en) |
| CN (1) | CN100480074C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5186138B2 (en) * | 2007-06-19 | 2013-04-17 | 東海ゴム工業株式会社 | Anti-vibration rubber stopper for railway vehicles |
| JP4982319B2 (en) * | 2007-09-26 | 2012-07-25 | 東海ゴム工業株式会社 | Bound stopper and manufacturing method thereof |
| KR100917557B1 (en) * | 2008-08-19 | 2009-09-16 | 현대모비스 주식회사 | Air spring assembly for air suspension in vehicle |
| JP2013096430A (en) * | 2011-10-28 | 2013-05-20 | Nok Corp | Bump stopper |
| BR112015007323A2 (en) | 2012-10-02 | 2017-07-04 | Basf Se | energy absorbing shock absorber, dual rate bump damping assembly, single vehicle suspension system |
| JP5799069B2 (en) * | 2013-10-08 | 2015-10-21 | カヤバ工業株式会社 | Shock absorber |
| CN104930108B (en) * | 2015-07-20 | 2016-09-07 | 浙江工贸职业技术学院 | A kind of shock absorber buffer body |
| US9976620B2 (en) * | 2015-10-05 | 2018-05-22 | The Pullman Company | System and method for a bushing assembly having radial rubber stopper |
| JP2018084276A (en) * | 2016-11-23 | 2018-05-31 | 東洋ゴム工業株式会社 | Bump stopper |
| RU178063U9 (en) * | 2017-08-02 | 2018-09-06 | Ян Михайлович СОРОКИН | DAMPING |
| WO2019116878A1 (en) * | 2017-12-15 | 2019-06-20 | Nok株式会社 | Damping stopper |
| CN113251103B (en) * | 2021-05-17 | 2023-04-07 | 扬州工业职业技术学院 | Deceleration buffer mechanism based on unmanned aerial vehicle oblique photography for Internet of things |
-
2004
- 2004-12-17 JP JP2004366710A patent/JP4362439B2/en not_active Expired - Fee Related
-
2005
- 2005-12-19 CN CNB2005101339273A patent/CN100480074C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1789028A (en) | 2006-06-21 |
| JP2006170386A (en) | 2006-06-29 |
| JP4362439B2 (en) | 2009-11-11 |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SUMITOMO RIKO COMPANY LIMITED Free format text: FORMER NAME: TOKAI RUBBER INDUSTRIES, LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Aichi Prefecture, Japan Patentee after: SUMITOMO RIKO Co.,Ltd. Patentee after: Toyota Motor Corp. Address before: Aichi Prefecture, Japan Patentee before: Tokai Rubber Industries, Ltd. Patentee before: Toyota Motor Corp. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090422 Termination date: 20171219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |