CN207005167U - Draw rubber bushing - Google Patents
Draw rubber bushing Download PDFInfo
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- CN207005167U CN207005167U CN201720914375.8U CN201720914375U CN207005167U CN 207005167 U CN207005167 U CN 207005167U CN 201720914375 U CN201720914375 U CN 201720914375U CN 207005167 U CN207005167 U CN 207005167U
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- face
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- ring surface
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Abstract
Draw rubber bushing, the rubber layer being bonded in including mandrel, overcoat and vulcanization between mandrel and overcoat, it is characterized in that the rubber outer mold surface of described rubber layer close to the end face one of overcoat and close to the end face two of mandrel by forming, described end face one moves closer to the outwardly convex shape of overcoat in ecto-entad, and it is sequentially connected and is formed by multiple ring surfaces, described end face two is planar annular, and seamlessly transitted with end face one by fillet that end face one is connected with outer casing inner wall by small round corner transition.Traction rubber bushing anti-fatigue performance of the present utility model is high, multiple variation rigidity can be achieved and nonlinear stiffness characteristic is high.
Description
Technical field
A kind of traction rubber bushing is the utility model is related to, realizes that multiple change of the traction rubber bushing in load bearing process is firm
Degree, belongs to rail vehicle flexible member field.
Background technology
Ball pivot product is during loading operation, according to installation site and the difference of design function, it is possible to achieve vibration damping, lead
Draw and the effect such as be flexibly connected.In order to ensure the comfortableness of vehicle operation, it is desirable to which product is in side crops industry (normal fortune
Rigidity when OK) is smaller；However, to ensure that vehicle reliability of operation, it is desirable to which product (starts and made in big load
It is dynamic) rigidity substantially increase is so as to spacing in time, therefore ball pivot particularly draws ball pivot and needs to have a certain degree of variation rigidity.
Under complicated operating condition, ball pivot not only needs to have a certain degree of variation rigidity, it is also necessary to is become according to the carrying of operating condition
Change, multiple variation rigidity is formed, to meet the carrying demand under complex working condition.
Existing ball pivot product, using the U-shape structure being inwardly recessed, its shortcoming, which is to be formed on type face, to be split in rubber-type face
Line or fold, easily there is fold cracking and extruding cracking close to the position of overcoat and mandrel, and stiffness variation is single, nothing
Method meets the rigidity requirement under big load, and the nonlinear characteristic of rigidity is low, can not meet the carrying need of complicated operating condition
Ask.
The A of CN 106032832, a kind of ball hinged rubber elastic element, including mandrel are disclosed, is sheathed on outside the mandrel
Rubber, the overcoat being sheathed on outside the rubber, the length of the overcoat is more than the length of the rubber, and the rubber from
The side that the overcoat connects is to the side length to connect with the mandrel by increasing.Rubber connects with the overcoat certainly in this scheme
Side to the side length that connects with the mandrel by increasing, the contact area of rubber is the product as load is gradually increased
Rigidity is stepped up in gradual, and rigidity increases uniformly, while can also meet multiple rigidity under multiple load as needed
It is required that.But without solution under complicated operating condition, according to carrying demand, how to realize the multiple variation rigidity of product and how to adjust
The technical problem of the non-linear rigidity of whole product.
Utility model content
The utility model provides and is directed to problems of the prior art, there is provided a kind of anti-fatigue performance is high, it is more to can be achieved
Secondary variation rigidity and the high traction rubber bushing of nonlinear stiffness characteristic.
It is to reach above-mentioned purpose the technical solution adopted in the utility model：Draw rubber bushing, including mandrel, overcoat and
Vulcanization is bonded in the rubber layer between mandrel and overcoat, it is characterised in that the rubber outer mold surface of described rubber layer is by close to overcoat
End face one and formed close to the end face two of mandrel, described end face one moves closer to the outwardly convex shape of overcoat in ecto-entad
Shape, and be sequentially connected and formed by multiple ring surfaces, described end face two is planar annular, and smoothed by fillet with end face one
Cross, end face one is connected with outer casing inner wall by small round corner transition.
Preferably, the ring that described end face one passes through round-corner transition by the ring surface one being connected with small round corner and end face two
Shape face two and at least one ring surface three being connected between ring surface one and ring surface two form, two adjacent ring surfaces three
Between seamlessly transitted by fillet, ring surface three is seamlessly transitted with ring surface one and ring surface two by fillet.
Preferably, described ring surface one, ring surface two and ring surface three are planar annular, and the slope of ring surface one is small
In the slope of ring surface three, the slope of ring surface three is less than the slope of ring surface two, and the slope of ring surface three from the inside to the outside according to
Secondary increase.
Preferably, the outer end of described end face one vertically is located at the inner side of overcoat end face, and vertically outer of end face one
The axial distance at end and overcoat end face is no more than 2mm.
Preferably, the radial direction pre-extrusion contracting amount that the vulcanization of described rubber layer is bonded between mandrel and overcoat is H, described
The arc radius of small round corner is R, H/4≤R≤H/2, and the minimum clearance between described ring surface one and overcoat is H/2 ~ 2R.
In traction rubber bushing of the present utility model, the rubber outer mold surface of rubber layer is by close to the end face one of overcoat and close
The end face two of mandrel forms, and described end face one moves closer to the outwardly convex shape of overcoat in ecto-entad, end face one with it is outer
Set inwall is connected by small round corner transition, and under big load, with the compression of rubber layer, the deformation of rubber layer is from end face one to overcoat
Inwall direction is bloated, and the deformation of rubber outer mold surface is carried out along the deformation rule of traction ball pivot, can effectively reduce rubber layer with it is outer
Set and the bulging of the rubber of mandrel junction, rubber outer mold surface is in reciprocal transformation, it is not easy to close to the position of overcoat and mandrel
There is gauffer cracking and extruding cracking, the anti-fatigue performance of traction ball pivot can be effectively improved.
End face one is sequentially connected by multiple ring surfaces and formed, and traction rubber bushing is adjusted by adjusting the quantity of ring surface
The number of variation rigidity in load bearing process, realize the multiple variation rigidity of traction rubber bushing.By adjust each ring surface shape,
Slope and width vertically come adjust the position of the traction multiple variation rigidity flex point of rubber bushing and adjacent variation rigidity flex point it
Between stiffness variation, meet that different operating conditions are required the different of traction rubber bushing variation rigidity, improve the non-linear of ball pivot
Stiffness characteristics.
By small round corner transition between end face one and outer casing inner wall, transition is adjusted according to the initial pre-extrusion amount of rubber layer
The arc radius in face one, so as to realize the regulation of drawing pull bar node initial stiffness, drawing pull bar node adaptation is set to be held with difference
Carry the initial stiffness requirement of operating mode.According to the arc radius of initial the pre-extrusion amount and small round corner of rubber layer, regulation small round corner with
The maximum spacing of outer casing inner wall, so that the beginning initial stress of rubber layer outer mold surface is minimum, improves rubber layer outer mold surface and carrying
Deformation characteristic in journey.
Brief description of the drawings
Fig. 1 is the structural representation that rubber bushing is drawn in embodiment.
Fig. 2 is Fig. 1 partial enlarged drawing.
Fig. 3 is stiffness curve of the embodiment in load bearing process.
Embodiment
1 to 3 pair of embodiment of the present utility model elaborates below in conjunction with the accompanying drawings.
Rubber bushing is drawn, including mandrel 1, overcoat 2 and vulcanization are bonded in the rubber layer 3 between mandrel 1 and overcoat 2, its
It is characterised by the rubber outer mold surface of described rubber layer 3 by close to the end face 1 of overcoat 2 and close to 2 32 groups of the end face of mandrel
Into described end face 1 moves closer to the outwardly convex shape of overcoat 2 in ecto-entad, and is sequentially connected by multiple ring surfaces
Composition, described end face 2 32 are planar annular, and seamlessly transitted with end face 1 by fillet, in end face 1 and overcoat 2
Wall is connected by the transition of small round corner 33.
As illustrated, end face 1 moves closer to the outwardly convex shape of overcoat 2 in ecto-entad, small round corner 33 connects outer
Cover 2 inwalls, the connecting mandrel 1 of end face 2 32, in load bearing process, load gradually increases, and rubber layer 3 is pressed against outer deformation, rubber layer 3
Deformation from end face 1 to the inwall direction of overcoat 2 bloat, end face 1 is gradually attached on the inwall of overcoat 2, the bulging of rubber
Gradually filled to the space that end face 1 is arrived between the inwall of overcoat 2, the deformation of rubber outer mold surface is along the deformation rule for drawing ball pivot
Carry out, the rubber that can effectively reduce rubber layer 3 and overcoat 2 and the junction of mandrel 1 bloats, rubber outer mold surface in reciprocal transformation,
It is not easy gauffer cracking and extruding cracking occurring close to the position of overcoat and mandrel, the antifatigue of traction ball pivot can be effectively improved
Performance.End face 1 is sequentially connected according to face by three ring surfaces and formed, during being adjacent in end face 1 and the inwall of overcoat 2,
Three ring surfaces are adjacent to by the inwall of overcoat 2 successively from the inside to the outside, variation rigidity twice the flex point S1 and S2 formed in load bearing process, such as
Shown in Fig. 3.In practical structures, the quantity of ring surface is determined by the carrying demand of operating condition, it is necessary to which what is illustrated is for reality
Now multiple variation rigidity flex point, the length of length and overcoat 2 vertically of end face 1 vertically are also needed according to end face 31 and overcoat 2
The demand that is gradually adjacent to and lengthen.
Specifically, described end face 1 passes through circle by the ring surface 1 being connected with small round corner 33 and end face 2 32
The ring surface 2 31.2 of angle transition and at least one ring surface three being connected between ring surface 1 and ring surface 2 31.2
31.3 form, and are seamlessly transitted between two adjacent ring surfaces 3 31.3 by fillet, ring surface 3 31.3 and ring surface one
31.1 and ring surface 2 31.2 seamlessly transitted by fillet.Pass through seamlessly transitting for fillet, when ensureing variation rigidity flex point, rigidity
Gentle transition, rigidity will not be produced and increased suddenly, when reducing generation variation rigidity flex point, the vibration of rubber bushing, improve train operation
Comfortableness.
Specifically, as shown in Fig. 2 described ring surface 1, ring surface 2 31.2 and ring surface 3 31.3 are ring
Shape plane, the slope of ring surface 1 are less than the slope of ring surface 3 31.3, and the slope of ring surface 3 31.3 is less than ring surface
2 31.2 slope, and the slope of ring surface 3 31.3 from the inside to the outside increases successively, formed ecto-entad move closer to overcoat 2 and
The end face 31 of outwardly convex, under big load, ring surface 1, ring surface 3 31.3 and ring surface 2 31.2 are successively to overcoat 2
Inwall is adjacent to.
Specifically, the outer end of described end face 1 vertically is located at the inner side of the end face of overcoat 1, and end face 1 is vertically
The axial distance of outer end and the end face of overcoat 1 be no more than 2mm.Ensure in big load, inwall of the end face 1 completely with overcoat 2
It is adjacent to, the bulging deformation of rubber layer 3 is carried out completely from end face 1 to the direction of the inwall of overcoat 2, by end face 1 to overcoat 1
The space of wall is filled up, and the rubber bulging close to overcoat 1 and the position of mandrel 1 is avoided, in big load back and forth loads, close to overcoat 2
Gauffer cracking and extruding cracking will not also occur with the rubber of the position of mandrel 1, draw the fatigue life under a large load of ball pivot
Effectively extended.
Specifically, the radial direction pre-extrusion contracting amount that the described vulcanization of rubber layer 3 is bonded between mandrel 1 and overcoat 2 is H, institute
The arc radius for the small round corner 33 stated is R, H/4≤R≤H/2, the minimum clearance between described ring surface 1 and overcoat 2
For H/2 ~ 2R.Due to crossing the arc radius R of small round corner 33, when determining that end face 1 contacts with the inwall of overcoat 2, rubber layer 3 is sent out
Raw rubber radial-deformation, i.e., the deflection that rubber layer 3 occurs before variation rigidity, therefore the radius of small round corner 33 is adjusted, can
The initial stiffness of ball pivot is adjusted, is drawn by repetition test, in the range of H/4≤R≤H/2, adjusts the circular arc half of small round corner 33
Footpath R, the regulation of ball pivot initial stiffness can be achieved, make the initial stiffness requirement of ball pivot adaptation different bearer operating mode.And setting
When counting the arc radius of small round corner 33, i.e., the initial stiffness and primary stress of node are taken into account, by repeated tests, is drawn
In the range of H/4≤R≤H/2, when ball pivot does not carry, small round corner 33 and the maximum spacing of the inwall of overcoat 2 are end face 1
Minimum spacing with the inwall of overcoat 2 is H/2 ~ 2R, and the primary stress suffered by end face 1 is minimum, can effectively improve end face 1
Deformation characteristic, extend its fatigue life.
The advantages of above-described traction rubber bushing, is：
1st, in reciprocal transformation, the deformation of rubber outer mold surface is carried out rubber outer mold surface along the deformation rule of traction ball pivot,
It is not easy gauffer cracking and extruding cracking occurring close to the position of overcoat and mandrel, the antifatigue of traction ball pivot can be effectively improved
Performance.
2nd, the multiple variation rigidity of traction rubber bushing is realized, meets different operating conditions to traction rubber bushing variation rigidity
Difference requires, improves the nonlinear stiffness characteristic of ball pivot.
3rd, the regulation of drawing pull bar node initial stiffness is realized, makes the first of drawing pull bar node adaptation different bearer operating mode
Beginning rigidity requirement.
Completely description is carried out to the technical scheme of embodiment of the present utility model, it is necessary to which explanation is institute above in association with accompanying drawing
The embodiment of description is only part of the embodiment of the present utility model.It is general based on the embodiment in the utility model, this area
The every other embodiment that logical technical staff is obtained on the premise of creative work is not made, belongs to the utility model
The scope of protection.
Claims (5)
1. rubber bushing is drawn, including mandrel（1）, overcoat（2）Mandrel is bonded in vulcanization（1）With overcoat（2）Between rubber
Layer（3）, it is characterised in that described rubber layer（3）Rubber outer mold surface by close to overcoat（2）End face one（31）With close core
The end face two of axle（32）Composition, described end face one（31）Overcoat is moved closer in ecto-entad（2）Outwardly convex shape, and
It is sequentially connected and is formed by multiple ring surfaces, described end face two（32）For planar annular, and with end face one（31）Put down by fillet
Slip over and cross, end face one（31）With overcoat（2）Inwall passes through small round corner（33）Transition connects.
2. traction rubber bushing according to claim 1, it is characterised in that described end face one（31）By with small round corner
（33）The ring surface one of connection（31.1）And end face two（32）Pass through the ring surface two of round-corner transition（31.2）Be connected to annular
Face one（31.1）With ring surface two（31.2）Between at least one ring surface three（31.3）Composition, two adjacent ring surfaces three
（31.3）Between seamlessly transitted by fillet, ring surface three（31.3）With ring surface one（31.1）And ring surface two（31.2）It is logical
Fillet is crossed to seamlessly transit.
3. traction rubber bushing according to claim 2, it is characterised in that described ring surface one（31.1）, ring surface two
（31.2）With ring surface three（31.3）It is planar annular, ring surface one（31.1）Slope be less than ring surface three（31.3）It is oblique
Rate, ring surface three（31.3）Slope be less than ring surface two（31.2）Slope, and ring surface three from the inside to the outside（31.3）Tiltedly
Rate increases successively.
4. traction rubber bushing according to claim 1, it is characterised in that described end face one（31）Outer end vertically
Positioned at overcoat（2）The inner side of end face, and end face one（31）Outer end vertically and overcoat（2）The axial distance of end face is no more than
2mm。
5. traction rubber bushing according to claim 1, it is characterised in that described rubber layer（3）Vulcanization is bonded in mandrel
（1）With overcoat（2）Between radial direction pre-extrusion contracting amount be H, described small round corner（33）Arc radius be R, H/4≤R≤H/
2, described ring surface one（31.1）With overcoat（2）Between minimum clearance be H/2 ~ 2R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720914375.8U CN207005167U (en) | 2017-07-26 | 2017-07-26 | Draw rubber bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720914375.8U CN207005167U (en) | 2017-07-26 | 2017-07-26 | Draw rubber bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207005167U true CN207005167U (en) | 2018-02-13 |
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ID=61457435
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720914375.8U Active CN207005167U (en) | 2017-07-26 | 2017-07-26 | Draw rubber bushing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269749A (en) * | 2017-07-26 | 2017-10-20 | 株洲时代新材料科技股份有限公司 | Draw rubber bushing and its multiple rigidity-changing method |
-
2017
- 2017-07-26 CN CN201720914375.8U patent/CN207005167U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269749A (en) * | 2017-07-26 | 2017-10-20 | 株洲时代新材料科技股份有限公司 | Draw rubber bushing and its multiple rigidity-changing method |
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