CN108001474A - A kind of method for improving high-speed EMU pivoted arm node anti-fatigue performance - Google Patents
A kind of method for improving high-speed EMU pivoted arm node anti-fatigue performance Download PDFInfo
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- CN108001474A CN108001474A CN201711440778.4A CN201711440778A CN108001474A CN 108001474 A CN108001474 A CN 108001474A CN 201711440778 A CN201711440778 A CN 201711440778A CN 108001474 A CN108001474 A CN 108001474A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
- B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
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Abstract
A kind of method for improving high-speed EMU pivoted arm node anti-fatigue performance, according to pivoted arm node present position, pivoted arm node is divided into two vulcanization bodies and mandrel press fitting fabricated structure, two of which vulcanizes the mutual on mandrel of body, and realize that pivoted arm node vulcanizes body rubber body precommpression by the relative position of overcoat and inner sleeve, pivoted arm node avoids pivoted arm node rubber bodies when bearing longitudinal force, cross force from being in extended state by implementing radial precompressed and axial precommpression at the same time to pivoted arm node vulcanization body, effectively improves product anti-fatigue performance.Adjust pivoted arm node footpath, axial rigidity by this way at the same time；Axially stop block and overload protection arrangement are set in pivoted arm node at the same time, the axial float in pivoted arm node operational process is prevented by axially stop block, prevents pivoted arm node overload from running by overload protection arrangement.
Description
Technical field
The present invention relates to a kind of method for the system unit performance for improving vehicle, and in particular to improves high quick-action to one kind
The method of car group pivoted arm node anti-fatigue performance, is mainly used for the bogie primary vibration insulating system of China's standard EMU.Belong to rail
Road vehicular traffic critical component manufacturing technology field.
Background technology
In order to really form our the autonomous unified high ferro standard techniques of country, China started just to propose in 2012 to want
Establish the standard EMU of China.So-called Chinese Industrial Standards (CIS) EMU：Referred to as mark and move, refer to Chinese Industrial Standards (CIS) system and occupy an leading position
EMU（In 254 major criterions, various Chinese Industrial Standards (CIS)s account for 84%）, the construction reference of its profile and supporting track
All it is higher than European standard and Nippon Standard, there is distinct and comprehensive Chinese feature；This also refers in the environment in face of diversified CRH
In（Including the four big CRH6 for introducing type and Chinese autonomous Design）, Chinese EMU is carried out and is standardized（It is unitized）Design with
Interconnect.This new EMU newly developed increases compatibility, large quantities of features such as do not derail again, thus form it is distinct and
Comprehensive China's feature, by using names EMU Chinese Industrial Standards (CIS)（Hua Biao）, represent the advanced standard body of current world's EMU technology
System.
The main purpose for developing Chinese Industrial Standards (CIS) EMU is：
1st, the needs of scientific research and innovation, research of technique.Strengthen the scientific research and research of technique of high-speed railway key technology, make China
High ferro technology keeps world lead level.
2nd, seek unity of standard, reduce the needs of cost.For the EMU of different model, unified technical standard body is established
System, realize EMU in service function, with the unification in maintenance, improve efficiency, reduce cost.
In order to adapt to the requirement of Chinese Industrial Standards (CIS) EMU, to being permitted including bogie and bogie integral vibration damping system
More important component is required for re-starting design and research；Wherein, it is among pivoted arm to be installed on one, is connected for pivoted arm positioning flexible
Connect, the pivoted arm node for transmitting longitudinal force is exactly one of them.Pivoted arm node is also referred to as axle box guidance joint, is train A class keys portion
Part, its performance directly affect vehicle movement stability, and pivoted arm node is because of longitudinal rigidity and deflection stiffness is excessive easilys lead to take turns
To abrasion.According to the position of journal box spring, swing arm type positioning can be divided into axis top spring and ride on spring again positions two kinds.
What standard motor train unit bogie used is exactly the spring positioning of axis top, and the journal box spring seat is in the top of axle box, its center line
In one plane, play main vertical carrying with taking turns to center line.Pivoted arm node installation is fixed when one is among pivoted arm
Position pivoted arm one end and columnar axle box are affixed, and the other end is by the pivoted arm node that caoutchouc elasticity makes with welding architecturally
Mounting base is connected.Pivoted arm node allows axle box to have larger vertical deviation with respect to framework, but the rubber in pivoted arm node can be with
The horizontal and vertical locating stiffness that axle-box locating system is different is supplied to, is positioned with to adapt to rail truck for a system longitudinal and transverse
The requirement of the different flexibly positioned rigidity of both direction.But existing EMU can produce very big axial punching in running at high speed
Hit, and existing pivoted arm node, there are longitudinal rigidity and deflection stiffness are excessive, pivoted arm node easily goes out in normal operation
Existing fatigue, and between pivoted arm and car body under the action of axial force, the loosening of pivoted arm node easily occur, cause axial jump, this
Sample will be easy to the rubber bodies appearance fatigue so that pivoted arm node, take turns to increased wear, therefore suddenly need to be solved.
By patent retrieval and do not find there be the patent literature constructed with the present invention, have certain relation with the present invention
Patent mainly have it is following：
1st, Patent No. CN200510031727.7, a kind of entitled " combined ball hinged rubber elastic element axial direction precommpression
The patent of invention of method and product ", which disclose a kind of combined ball hinged rubber elastic element axial direction precommpression method
And product, belong to a kind of ball hinged rubber elastic element, including metal-coating, elastic rubbery body, inner metal sleeve and mandrel, it is special
Point is that the metal-coating, elastic rubbery body and inner metal sleeve of ball hinged rubber elastic element combine for mutually independent two-period form
Structure, whole ball hinged rubber elastic element are to be combined to form by two independent metal-coatings, elastic rubbery body, inner metal sleeves
Elastomer axially combine on mandrel, the elastic rubbery body precompressed stress under compression of ball hinged rubber elastic element is to pass through
Adjust what metal-coating was realized with the mutual axial location of inner metal sleeve.Elastic rubbery body precompressed stress under compression can be inner metal sleeve
For two sections of axial separation, by being compressed axially inner metal sleeve, axial location of the adjustment inner metal sleeve on mandrel produces elasticity
Rubber bodies precompressed stress under compression.
2nd, number of patent application CN200520051167.7, entitled " a kind of combined ball hinged rubber elastic element "
Utility model patent, which disclose a kind of combined ball hinged rubber elastic element, belong to a kind of ball hinged rubber elastic
Element, including metal-coating, elastic rubbery body, inner metal sleeve and mandrel, its feature are the gold of ball hinged rubber elastic element
Belong to overcoat, elastic rubbery body and inner metal sleeve are mutually independent two-period form combining structure, whole ball hinged rubber elastic element
It is axially to be combined on mandrel by two independent metal-coatings, elastic rubbery body, inner metal sleeve assembly, flexural pivot class
The elastic rubbery body precompressed stress under compression of rubber elastic element is by adjusting metal-coating and the mutual axial location of inner metal sleeve
Realize.Elastic rubbery body precompressed stress under compression can be two sections that inner metal sleeve is axial separation, by being compressed axially in metal
Set, axial location of the adjustment inner metal sleeve on mandrel produce elastic rubbery body precompressed stress under compression.
3rd, Patent No. CN201510707088.5, entitled " adjustment rubber layer pre compressed magnitude changes pivoted arm connection stiffness
Method and pivoted arm node " patent of invention, which disclose a kind of adjustment rubber layer pre compressed magnitude, to change pivoted arm node firm
The method of degree, is the method that axle box bearing abrasion is prevented by adjusting pivoted arm node rubber layer pre compressed magnitude, using two pitch cone shapes
Endoporus pivoted arm combination of nodes structure, has changed the different axial direction of pivoted arm node just by increasing pivoted arm node rubber layer pre compressed magnitude
Performance is spent, and pivoted arm node axial rigidity is improved by increasing pivoted arm node rubber layer pre compressed magnitude so that axial rigidity control
Make in 6-8KN.mm-1, avoid deflection stiffness and torsion stiffness from declining, effectively reduce axle bearing abrasion.
4th, Patent No. CN201510706982.0, it is entitled " by varying pivoted arm node structure size adjusting rigidity
The patent of invention of method and pivoted arm node ", which disclose a kind of by varying pivoted arm node structure size adjusting rigidity
Method, is the method for improving pivoted arm connection stiffness matching performance by adjusting pivoted arm node structure size, using in two pitch cone shapes
Hole pivoted arm combination of nodes structure, and by varying pivoted arm node rubber molding surface size and pivoted arm node inner sleeve and the diameter ruler of overcoat
It is very little to change the rigidity property of pivoted arm node so that the longitudinal rigidity and deflection stiffness of pivoted arm node decline.Pass through rubber-type face
The rigidity of the Matching and modification pivoted arm node of size and the diameter dimension of pivoted arm node inner sleeve and overcoat so that the longitudinal direction of pivoted arm node
Rigidity and deflection stiffness decline, and ensure that the longitudinal rigidity of pivoted arm node is controlled in 11-13KN.mm-1, and by controlling longitudinal direction firm
Degree reduces deflection stiffness, while by increasing axial rigidity, ensures that the axial rigidity of pivoted arm node is controlled in 6-8KN.mm-1 models
Within enclosing, ensure that torsion stiffness does not decline.
Although these above-mentioned patents have been directed to pivoted arm node, wherein what is also had special proposes that to improve pivoted arm node pre-
Decrement changes the technical solution of pivoted arm connection stiffness, but proposed Technological improvement plan does not propose how to move for Chinese Industrial Standards (CIS)
The requirement of car group improves pivoted arm node, therefore pivoted arm node longitudinal rigidity and deflection stiffness are excessive, and pivoted arm node is working normally
Easily loosened under state, cause rubber bodies fatigue, pivoted arm node axial jump occur so that the problem of wheel aggravates abrasion
Still have, need further to be studied.
The content of the invention
It is an object of the invention to excessive for existing pivoted arm node longitudinal rigidity and deflection stiffness, pivoted arm node is normal
Easily loosened under working status, cause rubber bodies fatigue, pivoted arm node axial jump occur so that take turns what abrasion were aggravated
Problem, proposes a kind of method of new raising pivoted arm node entirety anti-fatigue performance, the new pivoted arm node entirety fatigue resistance
Can method improve the overall performance of pivoted arm node by varying the structure and method of adjustment of pivoted arm node, ensureing pivoted arm section
In the case of the variation rigidity of point, pivoted arm node entirety anti-fatigue performance is effectively improved, so that pivoted arm node reaches standard motor-car
The requirement of group bogie dynamic performance.
In order to reach this purpose, the present invention provides a kind of side for improving high-speed EMU pivoted arm node anti-fatigue performance
Method, according to pivoted arm node present position, is divided into two vulcanization bodies by pivoted arm node and is pressed fabricated structure, two of which with mandrel
Vulcanize the mutual to realizing that pivoted arm node vulcanization body rubber body is pre- on mandrel, and by the relative position of overcoat and inner sleeve of body
Compression, its feature is, pivoted arm node by pivoted arm node is vulcanized body implement at the same time radial precompressed and axial precommpression come
Avoid pivoted arm node rubber bodies when bearing longitudinal force, cross force from being in extended state, effectively improve product anti-fatigue performance.Together
When adjust pivoted arm node footpath, axial rigidity by this way；Axially stop block and overload is set to protect in pivoted arm node at the same time
Protection unit, prevents the axial float in pivoted arm node operational process by axially stop block, is prevented by overload protection arrangement
Pivoted arm node overload is run.
Further, it is described to be adjusted by implementing radial precompressed and axial precommpression at the same time to pivoted arm node vulcanization body
Turn over arm joint point footpath, axial rigidity are to implement radial contraction to pivoted arm node overcoat so that vulcanization body rubber radial compression, is realized
Radial rigidity adjusts；Vulcanize body rubber by the inner sleeve radial movement compresses of pivoted arm node at the same time, realize that axial rigidity adjusts.
Further, the radial contraction of implementing to pivoted arm node overcoat is that the two vulcanization body assemblings of pivoted arm node are whole
Body is pressed into radial compression frock so that pivoted arm node overcoat radial contraction, then be pressed into pivoted arm, so that real to vulcanization body rubber body
Apply radial precompressed.
Further, the pivoted arm node overcoat be the overcoats by two vulcanization bodies to dress, and two overcoats are connected
End face be three-stage convex-concave rim of the mouth match ledge structure；The external set of wherein one vulcanization is female structure, and another vulcanization is external
Cover for outer male structure, by the cooperation assembly and connection of three-stage convex-concave rim of the mouth interference together；The overcoat of pivoted arm node is first mutual
Radial compression frock is pressed into by rim of the mouth matched together, then entirely through forcing press so that pivoted arm node is integrally formed radially
Compression；The scope of radial compression is the 5%-15% of vulcanization body rubber layer thickness.
Further, the axial limiting includes the restriction of pivoted arm node overcoat, vulcanization body rubber body limits, inner sleeve limits
And/or mandrel limits the combination restriction of four aspects, is limited by pivoted arm node overcoat, vulcanization body rubber body limits, inner sleeve limits
The combination that fixed and/or mandrel limits four aspects limits the axial float realized and prevented in pivoted arm node operational process.
Further, it is and two overcoat phases to dress by the overcoats of two vulcanization bodies that the pivoted arm node overcoat, which limits,
The end face of connection is the ledge structure that three-stage convex-concave rim of the mouth matches；The external set of wherein one vulcanization is female structure, another vulcanization
External set is outer male structure, by the cooperation assembly and connection of three-stage convex-concave rim of the mouth interference together；The three-stage convex-concave
The fit on face packet leaned on outside overcoat of two overcoat matching end face of pivoted arm node in the three-stage ledge structure that rim of the mouth matches
Contact with each other after dress together, and do not contacted by mutually end face after the interior mating surface part assembling in overcoat, leave gap, and will
Rim of the mouth position is positioned close to lower 1/3rd position of the whole faying face of mandrel, with ensure overcoat match together when
Wait, the three-stage fit on face part of overcoat is very close to each other, and has the contact surface longer than interior mating surface part, convenient control
The length of overcoat and prevent soil from remaining in the gap of overcoat.
Further, the inner sleeve limit include before assembling, vulcanize external set with it is interior be sleeved on it is axial there are difference in height,
Inner sleeve will stretch out one section in the axial direction；After assembling, so that vulcanization covers end face and mandrel platform outside in vivo after inner sleeve compression
Terrace is concordant, and the outer end face of permanent retention inner sleeve is concordant with mandrel step surface after the axial precommpression of realization, effectively prevents axial pre-
The inconsistent axial jump brought of decrement；It is by adjusting adjustable L-type two-part rubber that the vulcanization body rubber body, which limits,
Plastic structure, is realized in pivoted arm node after pivoted arm and vehicle frame is pressed into, in the case where ensureing pivoted arm connection stiffness matching demand,
The outer end face of inner sleeve is axially concordant with mandrel step surface.The adjustable L-type two-part rubber structure of the adjustment is to adjust L-type rubber
Colloid Lr partial-lengths mainly provide radial direction rigidity, and La partial-lengths mainly provide axial direction rigidity, by adjusting Lr
With the ratio and its angle A 1 of La length, A2 can effectively adjust product footpath axial direction Rigidity Matching relation, realize small journal axle than matching
Relation, and the matching relationship is a wide range of interior controllable.The journal axle rigidity ratio of the pivoted arm node can realize 40：12 and 17.5：
10。
Further, the mandrel, which limits, is included in the setting hard backstop of axial limiting on mandrel, controls the axial direction of inner sleeve
Compression distance, is not in excess compression after ensureing inner sleeve axial direction precommpression；It is axial after ensureing inner sleeve axial direction precommpression at the same time
Outer end face is concordant with mandrel step surface.The mandrel is multi-diameter shaft, and one section of the length that multi-diameter shaft matches with inner sleeve is inner sleeve
Length so that inner sleeve outer end face is concordant with mandrel ladder end face after inner sleeve axial direction precommpression, controls jumping for inner sleeve.
Further, the load protective device is two radial direction backstops of setting on mandrel, blocks inner sleeve respectively toward core
It is mobile among axis, and an annular groove is radially dug out on the mandrel between two radial direction backstop so that in mandrel and vulcanization body
A space is formed between component, while two vulcanizations are covered with the end face being connected in vitro toward shape between mandrel and vulcanization body component
Extend in into a space so that two vulcanizations covers the end face radial direction being connected and controlled with the distance between mandrel in pivoted arm in vitro
The radial deformation displacement distance that can bear before node overload；When the overload occurs, it is connected by the external set of two vulcanizations
The end face connect radially contacts to form overload protection with mandrel.
Further, set at the same time on the inside of described two radial direction backstops of mandrel, on the inside of the external set connecting end surface of the vulcanization
There is rounded corner, prevent pivoted arm node rubber deformation in load bearing process contacts from isolating, effectively protect rubber bodies, improve pivoted arm
Node lifetime.
Further, described two vulcanizations cover the end face being connected and are radially turning with the distance between mandrel control in vitro
The radial deformation displacement distance that can bear before arm node overload is controlled between 3mm-8mm.
The advantage of the invention is that：
The present invention is to implement footpath at the same time by vulcanizing body to pivoted arm node by the overall improvement to pivoted arm node, pivoted arm node
Product fatigue life is effectively improved to precommpression and axial precommpression, and adjusts pivoted arm node footpath, axial rigidity matching；At the same time
Axially stop block and overload protection arrangement are set in pivoted arm node, prevent pivoted arm node from running by axially stop block
Axial float in journey, prevents pivoted arm node overload from running by overload protection arrangement.So have the advantages that the following：
1st, pivoted arm node passes through radial and axial two-way precommpression so that pivoted arm node has adjustable when radially, axially carrying
Whole surplus, effectively prevents rubber from extended state occur, so as to improve product fatigue behaviour；
2nd, the running axial float of pivoted arm node can be effectively controlled by axially confining device, ensures product in normal work shape
Loosening is occurred without under state, it is ensured that product also occurs without play in axial impact, so as to reduce the friction of wheel pair, has axial anti-
Pine, anti-channeling function, improve service life of the wheel to components such as, bearings；
3rd, small journal axle can be achieved than matching relationship, and the matching relationship is a wide range of interior controllable.It is real using the designing scheme at present
Existing 40：12 and 17.5：The pivoted arm node of 10 journal axle rigidity ratios；
4th, after pivoted arm node population, certain gap H is formed due to being designed with overload protection arrangement, between mandrel and overcoat,
When products radial withstands shocks or overloads, rubber bodies are protected not to be damaged to adapt to load change.
Brief description of the drawings
Fig. 1 is the pivoted arm node general structure schematic diagram of one embodiment of the invention；
Fig. 2 is the vulcanization body structure diagram of one embodiment of the invention；
Fig. 3 is one embodiment of the invention pivoted arm node installation schematic diagram；
Fig. 4 is one embodiment of the invention pivoted arm node installation top cross-sectional view；
Fig. 5 is one embodiment of the invention pivoted arm node overload protective device structure diagram.
Embodiment
The present invention is further explained with specific embodiment below in conjunction with the accompanying drawings.
Embodiment one
Attached drawing gives one embodiment of the invention, it can be seen in the drawings that the present invention relates to one kind to improve high-speed EMU
The method of pivoted arm node anti-fatigue performance, according to pivoted arm node present position, by pivoted arm node 1 be divided into two vulcanization bodies 2 and 3 with
Mandrel 4 is pressed fabricated structure, two of which vulcanization body 2 and 3 it is mutual on mandrel 4, and pass through overcoat 5 and inner sleeve 6
Relative position realize 7 precommpression of rubber bodies of pivoted arm node vulcanization body, its feature is that pivoted arm node passes through to pivoted arm node
The rubber bodies 7 for vulcanizing body are implemented radial compression and are compressed axially to effectively improve product fatigue life and adjust pivoted arm node at the same time
Footpath, axial rigidity matching；Axially stop block 9 and overload protection arrangement 10 are set in pivoted arm node at the same time, pass through axial limit
Position device 9 prevents the axial float in pivoted arm node operational process, protects pivoted arm node overload to transport by overload protection arrangement 10
OK.
Described adjusts pivoted arm section by implementing radial precompressed and axial precommpression at the same time to pivoted arm node vulcanization body 7
Point footpath axial rigidity is to implement radial contraction to pivoted arm node overcoat so that vulcanizes 7 radial compression of rubber bodies of body, realizes radially
Stiffness equivalent；Vulcanize the rubber bodies 7 of body by the inner sleeve radial movement compresses of pivoted arm node at the same time, realize that axial rigidity adjusts.
It is described pivoted arm node overcoat 5 is implemented radial contraction be by pivoted arm node it is outer be sleeved on two vulcanization bodies assemblings after
An entirety is formed, then extrusion tooling is pressed into by forcing press so that pivoted arm node overcoat radial contraction, so as to vulcanizing body rubber
Glue part is implemented radial precompressed.
The pivoted arm node overcoat 5 be the overcoats by two vulcanization bodies to dress, and the end face 8 that two overcoats are connected is
The ledge structure that three-stage convex-concave rim of the mouth matches；The external set of wherein one vulcanization is female structure, and another external set of vulcanization is evagination
Structure, by the cooperation assembly and connection of three-stage convex-concave rim of the mouth interference together；The overcoat of pivoted arm node is first each other by rim of the mouth
Matched together, then radial compression frock is pressed into by forcing press so that radial compression is integrally formed in pivoted arm node；Radial compression
Scope for vulcanization body rubber layer thickness 5%-15%.
Two overcoat matching end face of pivoted arm node in the three-stage ledge structure that the three-stage convex-concave rim of the mouth matches
Contact with each other together after being assembled by the fit on face part 14 outside overcoat, and after being assembled by the interior mating surface part 15 in overcoat
Mutual end face does not contact, and leaves gap, and 16 position of rim of the mouth is positioned close to lower 1/3rd of the whole faying face of mandrel
Within position, with ensure overcoat match together when, the three-stage fit on face part of overcoat is very close to each other, and three-stage
Fit on face part has the contact surface longer than interior mating surface part, convenient to control the length of overcoat and prevent mutual
Interference, and avoid soil from remaining in the gap of overcoat.
The axial limiting 9 includes pivoted arm node overcoat and limits, vulcanizes the restriction of body rubber part, inner sleeve restriction and/or core
The combination of the aspect of axis limit four limits, limited by pivoted arm node overcoat, vulcanization body rubber part limits, inner sleeve limits and/or
The combination that mandrel limits four aspects limits the axial float realized and prevented in pivoted arm node operational process.
The inner sleeve is limited to be sleeved on axially there are difference in height including before assembling, vulcanizing external set with interior, is inside sleeved on axis
One section is stretched out to direction；After assembling, so that the end face of the internal set of vulcanization outside is concordant with mandrel step surface after inner sleeve compression,
The outer end face of permanent retention inner sleeve is concordant with mandrel step surface after the axial precommpression of realization, effectively prevents vulcanization body axial direction precommpression
Measure the inconsistent axial jump brought.The axial compression amount of inner sleeve is the 5%-15% of vulcanization body rubber layer axial width.
It is by adjusting adjustable L-type two-part rubber structure that the vulcanization body rubber part, which limits, is realized in pivoted arm section
After point is pressed into pivoted arm and car body, in the case where ensureing pivoted arm connection stiffness matching demand, outer end face and the mandrel platform of inner sleeve
Terrace is axially concordant.
The adjustable L-type two-part rubber structure of the adjustment is to adjust L-type rubber bodies Lr partial-lengths mainly to provide footpath
To directional stiffness, La partial-lengths mainly provide axial direction rigidity, by adjusting the ratio and its angle A 1 of Lr and La length,
A2 can effectively adjust product footpath axial direction Rigidity Matching relation, realize small journal axle than matching relationship, and the matching relationship is interior on a large scale
It is controllable.
The journal axle rigidity ratio of the pivoted arm node is controlled 40：12.
The mandrel, which limits, is included in the setting hard backstop of axial limiting on mandrel, and control inner sleeve is compressed axially distance,
Be not in excess compression after ensureing inner sleeve axial direction precommpression；After ensureing inner sleeve axial direction precommpression at the same time, axial outer end face and core
Axis step surface is concordant.
The mandrel 4 is multi-diameter shaft, multi-diameter shaft and the length that one section of the length that inner sleeve matches is inner sleeve so that inner sleeve
Inner sleeve outer end face is concordant with mandrel ladder end face after axial precommpression, controls jumping for inner sleeve；Multi-diameter shaft entire length is pivoted arm
The width of pivoted arm of the node card in car body, and ensure that the rotation of pivoted arm leaves gap.
The load protective device 10 is two radial direction backstops 11 of setting on mandrel, blocks inner sleeve respectively toward among mandrel
It is mobile, and an annular groove 12 is radially dug out on the mandrel between two radial direction backstop so that in mandrel 4 and vulcanization body component
Between formed a space, while to two vulcanization cover in vitro the end face being connected toward mandrel and vulcanize body component between form one
Extend in a space so that two vulcanizations covers the end face radial direction being connected and controlled with the distance between mandrel in pivoted arm node in vitro
The radial deformation displacement distance that can bear before overload；When the overload occurs, it is connected by the external set of two vulcanizations
End face radially contacts to form overload protection with mandrel.
Described two vulcanizations covers the distance between the end face radial direction that is connected and mandrel and control in pivoted arm node mistake in vitro
The radial deformation displacement distance that can bear before load is controlled between 3mm-6mm so that when vulcanization body deformation is excessive, passes through metal
The overload protection of hardness is realized in the contact of part.
Pass through above-mentioned design so that the pivoted arm node 1 of the present embodiment operationally can effectively prevent pivoted arm node in pivoted arm
Axial jump in 13, ensures that product occurs without loosening in normal operation, and does not ensure product in axial impact also not
There is play, improve overall anti-fatigue performance, meet the requirement of standard EMU.
Embodiment two
Embodiment two and the structure of embodiment one are essentially the same, and simply controlled footpath axial direction ratio of rigidity and overload protection arrangement are set
Put it is different, for a kind of method for improving high-speed EMU pivoted arm node anti-fatigue performance, according to pivoted arm node present position,
Pivoted arm node is divided into two vulcanization bodies and mandrel press fitting fabricated structure, two of which vulcanizes the mutual to mounted in mandrel of body
On, and realize that pivoted arm node vulcanizes body rubber part precommpression by the relative position of overcoat and inner sleeve, its feature is, pivoted arm section
Point effectively improves product fatigue life by implementing radial precompressed and axial precommpression at the same time to pivoted arm node vulcanization body, and
Adjust pivoted arm node footpath, axial rigidity matching；Axially stop block and overload protection arrangement are set in pivoted arm node at the same time, led to
Crossing axially stop block prevents axial float in pivoted arm node operational process, and pivoted arm node mistake is prevented by overload protection arrangement
Carrying row.
The axial limiting includes pivoted arm node overcoat and limits, vulcanizes the restriction of body rubber part, inner sleeve restriction and/or mandrel
The combination for limiting four aspects limits, and is limited by pivoted arm node overcoat, vulcanization body rubber part limits, inner sleeve limits and/or core
The combination of four aspects of axis limit limits the axial float realized and prevented in pivoted arm node operational process.
It is and the end face that two overcoats are connected to dress by the overcoats of two vulcanization bodies that the pivoted arm node overcoat, which limits,
The ledge structure to match for three-stage convex-concave rim of the mouth；The external set of wherein one vulcanization is female structure, and another external set of vulcanization is outer
Male structure, by the cooperation assembly and connection of three-stage convex-concave rim of the mouth interference together.
Two overcoat matching end face of pivoted arm node in the three-stage ledge structure that the three-stage convex-concave rim of the mouth matches
Contact with each other together after fit on face packet dress outside by overcoat, and after being assembled by the interior mating surface part in overcoat mutually
End face does not contact, and leaves gap, and rim of the mouth position is positioned close to the lower a quarter position of the whole faying face of mandrel, with
When ensureing that overcoat is matched together, the three-stage fit on face part of overcoat is very close to each other, and with than interior cooperation face
Divide longer contact surface, it is convenient to control the length of overcoat and prevent soil from remaining in the gap of overcoat.
The inner sleeve is limited to be sleeved on axially there are difference in height including before assembling, vulcanizing external set with interior, is inside sleeved on axis
One section is stretched out to direction；After assembling, so that the end face of the internal set of vulcanization outside is concordant with mandrel step surface after inner sleeve compression,
The outer end face of permanent retention inner sleeve is concordant with mandrel step surface after the axial precommpression of realization, effectively prevents vulcanization body pre compressed magnitude not
The axial jump unanimously brought.
It is by adjusting adjustable L-type two-part rubber structure that the vulcanization body rubber part, which limits, is realized in pivoted arm section
After point is pressed into pivoted arm and car body, in the case where ensureing pivoted arm connection stiffness matching demand, outer end face and the mandrel platform of inner sleeve
Terrace is axially concordant.
The adjustable L-type two-part rubber structure of the adjustment is to adjust L-type rubber bodies Lr partial-lengths mainly to provide footpath
To directional stiffness, La partial-lengths mainly provide axial direction rigidity, by adjusting the ratio and its angle A 1 of Lr and La length,
A2 can effectively adjust product footpath axial direction Rigidity Matching relation, realize small journal axle than matching relationship, and the matching relationship is interior on a large scale
It is controllable.
The journal axle rigidity ratio of the pivoted arm node is controlled 17.5：10.
The mandrel, which limits, is included in the setting hard backstop of axial limiting on mandrel, and control inner sleeve is compressed axially distance,
Be not in excess compression after ensureing inner sleeve axial direction precommpression；After ensureing inner sleeve axial direction precommpression at the same time, axial outer end face and core
Axis step surface axial end is concordant.
The mandrel is multi-diameter shaft, multi-diameter shaft and the length that one section of the length that inner sleeve matches is inner sleeve so that inner sleeve
Inner sleeve outer end face is concordant with mandrel ladder end face after axial precommpression, controls jumping for inner sleeve.
The load protective device is two radial direction backstops of setting on mandrel, blocks inner sleeve respectively toward shifting among mandrel
It is dynamic, and an annular groove is radially dug out on the mandrel between two radial direction backstop so that between mandrel and vulcanization body component
A space is formed, while the end face being connected is covered in vitro to two vulcanizations and forms a sky toward between mandrel and vulcanization body component
Interior extension so that two vulcanizations covers the end face radial direction being connected and controlled with the distance between mandrel in pivoted arm node overload in vitro
Before the radial deformation displacement distance that can bear；When the overload occurs, the end face being connected is covered in vitro by two vulcanizations
Radially contact to form overload protection with mandrel.
Described two vulcanizations covers the distance between the end face radial direction that is connected and mandrel and control in pivoted arm node mistake in vitro
The radial deformation displacement distance that can bear before load is controlled between 6mm-8mm
Above-mentioned listed embodiment, simply carries out technical scheme clear, complete description with reference to attached drawing；Obviously, institute
The embodiment of description is only the part of the embodiment of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, all other embodiment that those of ordinary skill in the art are obtained without making creative work, belongs to
The scope of protection of the invention.
The advantage of the invention is that：
The present invention is to implement footpath at the same time by vulcanizing body to pivoted arm node by the overall improvement to pivoted arm node, pivoted arm node
Pivoted arm node fatigue life is effectively improved to precommpression and axial precommpression, and adjusts pivoted arm node footpath, axial rigidity matching；
Axially stop block and overload protection arrangement are set in pivoted arm node at the same time, prevent pivoted arm node from transporting by axially stop block
Axial float during row, prevents pivoted arm node overload from running by overload protection arrangement.So have the advantages that the following：
1st, pivoted arm node passes through radial and axial two-way precommpression so that pivoted arm node has adjustable when radially, axially carrying
Whole surplus, effectively prevents rubber from extended state occur, so as to improve product fatigue behaviour；
2nd, the running axial float of pivoted arm node can be effectively controlled by axially confining device, ensures product in normal work shape
Loosening is occurred without under state, it is ensured that product also occurs without play in axial impact, rubs so as to reduce wheel to components such as, bearings
Wipe, there is axial locking, anti-channeling, improve the service life taken turns to components such as, bearings；
3rd, small journal axle can be achieved than matching relationship, and the matching relationship is a wide range of interior controllable.It is real using the designing scheme at present
Existing 40：12 and 17.5：The pivoted arm node of 10 journal axle rigidity ratios；
4th, after pivoted arm node population, certain gap H is formed due to being designed with overload protection arrangement, between mandrel and overcoat,
When products radial withstands shocks or overloads, rubber bodies are protected not to be damaged to adapt to load change.
Claims (10)
- A kind of 1. method for improving high-speed EMU pivoted arm node anti-fatigue performance, according to pivoted arm node present position, by pivoted arm Node is divided into two vulcanization bodies and mandrel press fitting fabricated structures, two of which vulcanization body it is mutual on mandrel and logical The relative position for crossing overcoat and inner sleeve realizes that pivoted arm node vulcanizes body rubber body precommpression, it is characterised in that：Pivoted arm node passes through Radial precompressed and axial precommpression is implemented at the same time to pivoted arm node vulcanization body to avoid pivoted arm node from bearing longitudinal force, transverse direction Rubber bodies are in extended state during power, effectively improve product anti-fatigue performance.Adjust pivoted arm node footpath, axis by this way at the same time To rigidity；Axially stop block and overload protection arrangement are set in pivoted arm node at the same time, pass through the anti-rotation stop of axially stop block Axial float in arm joint point operational process, prevents pivoted arm node overload from running by overload protection arrangement.
- 2. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 1, it is characterised in that：It is described Implement radial precompressed and axial precommpression at the same time by vulcanizing body to pivoted arm node and adjust pivoted arm node footpath, axial rigidity It is that radial contraction is implemented to pivoted arm node overcoat so that vulcanization body rubber radial compression, realizes that radial rigidity adjusts；Pass through at the same time The inner sleeve radial movement compresses vulcanization body rubber of pivoted arm node, realizes that axial rigidity adjusts.
- 3. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 2, it is characterised in that：It is described Radial contraction of implementing to pivoted arm node overcoat be by the overall press-in radial compression frocks of the vulcanization bodies assembling of pivoted arm node two, make Pivoted arm node overcoat radial contraction is obtained, then is pressed into pivoted arm, so as to implement to vulcanization body rubber body radial precompressed.
- 4. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 2 or claim 3, it is characterised in that： The pivoted arm node overcoat be the overcoats by two vulcanization bodies to dress, and the end face that two overcoats are connected is three-stage convex-concave The ledge structure that rim of the mouth matches；The external set of wherein one vulcanization is female structure, and another external set of vulcanization is outer male structure, passes through three The cooperation assembly and connection of segmentation convex-concave rim of the mouth interference is together；The overcoat of pivoted arm node first each other by rim of the mouth matched together, Radial compression frock is pressed into entirely through forcing press so that radial compression is integrally formed in pivoted arm node again；The scope of radial compression To vulcanize the 5%-15% of body rubber layer thickness.
- 5. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 1, it is characterised in that：It is described Axial limiting include that pivoted arm node overcoat limits, vulcanization body rubber body limits, inner sleeve limits and/or mandrel limits four aspects Combination limit, pass through that pivoted arm node overcoat limits, vulcanization body rubber body limits, inner sleeve limits and/or mandrel limits four sides The combination in face limits the axial float realized and prevented in pivoted arm node operational process.
- 6. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 5, it is characterised in that：It is described Pivoted arm node overcoat limit be the overcoats by two vulcanization bodies to dress, and the end face that two overcoats are connected is three-stage convex-concave The ledge structure that rim of the mouth matches；The external set of wherein one vulcanization is female structure, and another external set of vulcanization is outer male structure, passes through three The cooperation assembly and connection of segmentation convex-concave rim of the mouth interference is together；The three-stage ledge structure that the three-stage convex-concave rim of the mouth matches In two overcoat matching end face of pivoted arm node by contacting with each other together after the fit on face packet dress outside overcoat, it is and outer Mutually end face does not contact after interior mating surface part assembling in set, leaves gap, and rim of the mouth position is positioned close to mandrel Lower 1/3rd position of whole faying face, when to ensure that overcoat is matched together, the three-stage fit on face of overcoat It is point very close to each other, and there is the contact surface longer than interior mating surface part, the convenient length for controlling overcoat with prevent soil from depositing Stay in the gap of overcoat.
- 7. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 5, it is characterised in that：It is described Inner sleeve limit and include before assembling, vulcanizing external set and being sleeved on that axial there are difference in height, inner sleeve to stretch out in the axial direction with interior One section；After assembling, so that the end face of the internal set of vulcanization outside is concordant with mandrel step surface after inner sleeve compression, axial precompressed is realized The outer end face of permanent retention inner sleeve is concordant with mandrel step surface after contracting, effectively prevents the inconsistent axial direction brought of axial pre compressed magnitude Jump；It is by adjusting adjustable L-type two-part rubber structure that the vulcanization body rubber body, which limits, realizes and exists in pivoted arm node After being pressed into pivoted arm and vehicle frame, in the case where ensureing pivoted arm connection stiffness matching demand, outer end face and the mandrel step of inner sleeve Face is axially concordant.The adjustable L-type two-part rubber structure of the adjustment is to adjust L-type rubber bodies Lr partial-lengths mainly to provide Radial direction rigidity, La partial-lengths mainly provide axial direction rigidity, by the ratio and its angle that adjust Lr and La length A1, A2 can effectively adjust product footpath axial direction Rigidity Matching relation, realize small journal axle than matching relationship, and the matching relationship is a wide range of It is interior controllable.The journal axle rigidity ratio of the pivoted arm node can realize 40：12 and 17.5：10.
- 8. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 5, it is characterised in that：It is described Mandrel limit and be included on mandrel the setting hard backstop of axial limiting, control the distance that is compressed axially of inner sleeve, ensure that inner sleeve is axial Be not in excess compression after precommpression；After ensureing inner sleeve axial direction precommpression at the same time, axial outer end face is put down with mandrel step surface Together.The mandrel is multi-diameter shaft, multi-diameter shaft and the length that one section of the length that inner sleeve matches is inner sleeve so that inner sleeve is axially pre- Inner sleeve outer end face is concordant with mandrel ladder end face after compression, controls jumping for inner sleeve.
- 9. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 5, it is characterised in that：It is described Load protective device be two radial direction backstops of setting on mandrel, block inner sleeve respectively toward mobile among mandrel, and in two footpaths An annular groove is radially dug out on to the mandrel between backstop so that a space is formed between mandrel and vulcanization body component, At the same time to two vulcanization cover in vitro the end face being connected toward mandrel and vulcanize body component between formation one space in extend so that Two vulcanizations cover what the end face being connected radially can bear with the distance between mandrel control before pivoted arm node overload in vitro Radial deformation displacement distance；When the overload occurs, the end face being connected is covered in vitro by two vulcanizations radially to connect with mandrel Touch and form overload protection.
- 10. the method for high-speed EMU pivoted arm node anti-fatigue performance is improved as claimed in claim 9, it is characterised in that：Institute State two radial direction backstops inner sides of mandrel, the external set connecting end surface inner side of the vulcanization while be provided with rounded corner, prevent pivoted arm section Point rubber deformation in load bearing process, which contacts, to be isolated, and is effectively protected rubber bodies, is improved pivoted arm node lifetime；Described two Vulcanization covers the radial direction that the end face being connected radially can bear with the distance between mandrel control before pivoted arm node overload in vitro Displacement distance controlling is between 3mm-8mm.
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| CN113770683A (en) * | 2021-09-30 | 2021-12-10 | 株洲时代瑞唯减振装备有限公司 | Method for assembling axle box pull rod rubber joint for locomotive |
| CN113958657A (en) * | 2021-11-04 | 2022-01-21 | 株洲时代瑞唯减振装备有限公司 | Axial variable stiffness and deflection variable stiffness adjustment of integral liquid rubber composite node |
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