CN208503253U - A kind of closed hollow core shaft and the vibration damping flexural pivot using the mandrel - Google Patents
A kind of closed hollow core shaft and the vibration damping flexural pivot using the mandrel Download PDFInfo
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- CN208503253U CN208503253U CN201820466105.XU CN201820466105U CN208503253U CN 208503253 U CN208503253 U CN 208503253U CN 201820466105 U CN201820466105 U CN 201820466105U CN 208503253 U CN208503253 U CN 208503253U
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- flexural pivot
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Abstract
The utility model belongs to flexural pivot product technical field, specifically provides a kind of closed hollow core shaft and the vibration damping flexural pivot using the mandrel.Mandrel includes mandrel main body, and mandrel body interior is hollow structure, and mandrel main body both ends are equipped with the connection structure of the closed hollow structure；Using closed hollow core shaft as pedestal, vulcanizes one layer of rubber between mandrel and housing and obtain vibration damping flexural pivot.The closed hollow core shaft of the utility model realizes the lightweight of mandrel/flexural pivot while guaranteeing structural strength performance requirement, meanwhile, flexural pivot is reduced using material, reduces material cost, and synthesis reduces cost of goods manufactured.During mandrel is prepared flexural pivot, the utility model hollow core shaft faster compared to solid construction heat-transfer rate, can save the preheating procedure in sulfuration process.The vibration damping flexural pivot of the utility model can improve the lightweight of automobile bottom diskware or suspension system, safety, the social effect with huge economic benefits.
Description
Technical field
The invention belongs to flexural pivot product technical field, more particularly to a kind of closed hollow core shaft and applying the core
The vibration damping flexural pivot of axis.
Background technique
As energy conservation and environmental protection increasingly becomes the topic of social extensive concern, energy conservation, emission reduction and lightweight are also led in automobile
Domain has attracted much attention, the lightweight of automobile improve manoeuvereability of automobile, reliability, safety and in terms of have it is outstanding
Meaning.In automobile market environment increasingly fierce now, major main engine plants are more and more to the research of automotive light weight technology, it is desirable that
Also higher and higher, the requirement especially on automobile bottom diskware, suspension system is more obvious.
Vibration damping flexural pivot is a kind of production of rubber-metal structure as a common components in automobile chassis and suspension system
Product are chiefly used in the link position of system synthesis, play the role of flexible connection with cushion load impact, as shown in Figure 1, on the market
Common buffering ball hinge structure type is that vulcanized rubber and housing obtain finished product on metal core axle, then finished product is pressed into system
In part.The load being transmitted on vibration damping flexural pivot may be along radial, axial, deflection or torsion, especially radially
Load is main.
In recent years, more and more to the research of the lightweight of vibration damping flexural pivot and low cost, but effect is all bad.Due to vibration damping
Flexural pivot main body generally uses metal core axle, and the lightweight of vibration damping flexural pivot can be entered from the selection for the metal material for preparing mandrel
Hand, metal material is substituted for aluminum/magnesium alloy or other light metals by some researchs, but lightweight is up to standard with strength character
Light metal mandrel and be unsatisfactory for people to low cost requirement；Metal material is substituted for plastic material by some researchs, but
The mandrel Static stiffness being prepared is insufficient, and under same load, obtained mandrel fatigue behaviour is low, is unable to satisfy practical need
It asks.
As shown in Fig. 2, some experts want through the bushing class product to act on similar bushing class product with vibration damping flexural pivot
Structure improves flexural pivot and mounting means, and the mandrel of the bushing product is hollow structure, the specially pipe structure of both ends open,
But at the same time, needing a pin shaft could connect across hollow core shaft with system unit, and need bolt by pin shaft and
System unit is fixed, and inherently there is no realize mandrel and the light-weighted demand of flexural pivot for this structure.
To sum up, a kind of lightweight vibration damping flexural pivot need to be designed, can be used meeting flexural pivot and under the premise of cost requirement,
The weight for reducing vibration damping flexural pivot as far as possible, reaching the light-weighted requirement of vibration damping flexural pivot is technical problem urgently to be solved.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one
Kind is equipped with the mandrel of closed hollow structure, mitigates weight under the premise of meeting strength character and low cost, and then realize core
Axis lightweight.
Another object of the present invention is to provide a kind of vibration damping flexural pivots using closed hollow core shaft.
To achieve the above object, technical solution of the present invention is as follows:
A kind of closed hollow core shaft, the mandrel include mandrel main body, and the mandrel main body is the hollow of both ends open
Structure, mandrel main body both ends are equipped with the connection structure of the closed hollow structure.
Mandrel main body is arranged to hollow structure by the present invention, and mandrel main body both ends are connection structures, is obtained closed hollow
Flexural pivot, while guaranteeing structural strength performance requirement, realize the lightweight of flexural pivot.For the intensity for guaranteeing connection structure, connection structure
Preferably solid construction.
Preferably, the mandrel main core shaft body length accounts for the 30%~50% of mandrel entire length, preferably 40%.
Preferably, the mandrel body outer surface is offset inward certain thickness and forms boring structure outline, the thickness
Degree accounts for 5~20%, further preferably the 6~12% of mandrel main body cross section maximum length.
Preferably, the outer surface of the mandrel main body is offset inward certain thickness and forms boring structure outline, appearance
The every place in the face offset thickness is identical.
Preferably, the outer surface of the mandrel main body is offset inward, and forms the boring structure of gradient thickness.With reference to core
Axial stress distribution, mandrel main body middle part stress is small, and both ends stress is big, is preferably by the changing rule of the mandrel body thickness
The thin both ends in middle part are thick.The thickness change position shows as forming fillet surface on hollow structure profile.
When mandrel main body is to wait wall thickness, boring contour structure is identical with outer surface；When the hollow knot of cydariform
Structure is that boring contour structure, which is equivalent to outer surface structure and is offset inward certain thickness, to be formed when becoming wall thickness structure, this is partially
It moves thickness to be changed with certain rule, is that smooth transition is bent in the boring profile that offset thickness change position is formed
Face.
The shape of mandrel main body of the present invention can be configured according to service condition.
Preferably, mandrel main body of the present invention is set as cylindrical structure.
It preferably, is the fatigue behaviour for improving flexural pivot, mandrel main body of the present invention is set as cydariform hollow structure.
Preferably, the connection structure is flat structure.
It is further preferred that the contact portion of the mandrel main body and the connection structure being connected with the mandrel main body is
Rotary structure.
Preferably, the connection structure is equipped with clamp device, and the clamp device is arranged to fix vibration damping flexural pivot
On system unit.
It is further preferred that the clamp device is the bolt hole and bolt compatible with bolt hole in connection structure,
The planar structure on flat structure both sides is more advantageous to the plane contact and locking of screw bolt and nut.
Preferably, mandrel main body and connection structure of the present invention are two independent parts, connection structure and mandrel master
Body both ends are fixedly connected by friction welding technological or other techniques, and different mandrel main bodys and the combination of same connection structure are made
With the hollow core shaft of different performance can be obtained, the connection structure at mandrel main body both ends mainly plays connection function.Mandrel of the present invention
The difference of the hollow structure of main body can obtain the vibration damping flexural pivot of different performance.In actual use, mandrel can be selected as desired
The connection structure of the combination of main body and connection structure, system identical for assembly space, vibration damping flexural pivot can be identical.It will be different
Mandrel main body and same connection structure be applied in combination, the hollow core shaft of different performance can be obtained.Therefore, core of the invention
Practical, the remarkable in economical benefits of axis and vibration damping flexural pivot.
Preferably, mandrel main body of the present invention can be by the way that tubing by pressurising upsetting formation type, interior high-pressure molding or to be spun into
Type technique obtains；Perhaps by bar it is machining obtain connection structure of the present invention be bar it is machining, forging or
Casting and forming, then the connection structure of mandrel main body and both ends is welded into one by the common welding procedure such as friction welding (FW), manual welding
Body obtains mandrel.
Wherein, in the various processing technologys of mandrel main body, punching press upsetting shape technique is biggish to diameter change gradient hollow
Structure can satisfy the equal wall thickness of design requirement or become wall thickness；Interior high-pressure molding technological forming is convenient, material is saved, to hollow
The processing technology comparative maturity of structural member is stablized；Spin forming die is simple, and die manufacturing cost is low, craft precision, intensity compared with
It is high；Machining craft precision is high, it can be achieved that degree height, easily prepared molding.
In the processing technology of connection structure, forging molding process is simple, and structure property is streamlined；Cast shaping process
Price is low, yield is big.
Or, it is preferable that the mandrel that the present invention is made of mandrel main body and connection structure can be by tubing pressurising upsetting shape one
It is body formed to obtain.
Preferably, when mandrel of the present invention does not use integral forming process, there are joint surface, which can be mandrel master
The joint face of body and connection structure；Can for mandrel any cross section or axial section, further preferably symmetrical infeed face or
Person's axial section.
Preferably, the plug through hollow structure is equipped in hollow structure of the present invention, it is further preferred that the core
Stick prolongs the setting of hollow structure axial direction.It is hollow structure inside mandrel of the present invention, on the basis of the hollow structure, setting one
Root runs through the middle part plug of hollow structure, can increase its bearing capacity.
It is further preferred that plug is cylindrical structure.
The present invention also provides a kind of vibration damping flexural pivots, including above-mentioned hollow core shaft, housing and vulcanization are between mandrel and housing
Elastomeric layer.It is preferred that the elastic material is rubber material.
Preferably, the vibration damping flexural pivot forming process the following steps are included:
S1. pre-treatment: the respective surface paint in conjunction with elastic material by mandrel and housing is placed in mold；
S2. it preheats: mold is preheated to 120~200 DEG C；
S3. vulcanize: by elastomer injection into mold, 140~200MPa of dwell pressure, 10~30min of pressure maintaining；
S4. depanning: opening mold, takes out product；
S5. it cools down: being cooled to room temperature to obtain finished product.
Compared with prior art, the present invention has the beneficial effect that:
(1) mandrel main body is arranged to hollow structure by closed hollow core shaft of the invention, and mandrel main body both ends are solid
Connection structure, obtain closed hollow core shaft, while guaranteeing structural strength performance requirement, reduce material cost,
While synthesis reduces cost of goods manufactured, lightweight is realized.
(2) mandrel of the present invention/flexural pivot main structure is hollow structure, mainly to realize light-weighted while guarantee using strong
For the purpose of degree, mandrel main body both ends connection structure mainly plays connection function, such as prepares mandrel, mandrel without using integral forming process
Mandrel main body and connection structure can be split up into two independent parts, can be realized combination or borrow, reduce development cost
And management cost.The mandrel being prepared using integral forming process then has better fatigue behaviour, while cost is lower.
(3) mandrel of the present invention is that hollow structure faster compared to solid construction heat-transfer rate can when preparing vibration damping flexural pivot
Save the preheating procedure in sulfuration process.
(4) closed hollow core shaft of the invention is applied to vibration damping flexural pivot, can improve automobile bottom diskware or suspension system
Lightweight, safety have huge economic benefit and social effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the existing flexural pivot of background technique.
Fig. 2 is the structural schematic diagram of the hollow bushing of background technique.
Fig. 3 is 1 mandrel perspective view of the embodiment of the present invention.
Fig. 4 is 1 mandrel main view sectional view of the embodiment of the present invention.
Fig. 5 is that 1 mandrel of the embodiment of the present invention splits top cross-sectional view.
Fig. 6 is 1 mandrel main structure chart of the embodiment of the present invention.
Fig. 7 is 1 connection structure structure chart of the embodiment of the present invention.
Fig. 8 is 2 core shaft structure figure of the embodiment of the present invention.
Fig. 9 is the hinged composition of 3 buffering ball of the embodiment of the present invention.
Figure 10 is 5 simulation modeling model schematic of the embodiment of the present invention.
Figure 11 is 5 flexural pivot rigidity stress envelope of the embodiment of the present invention.
Figure 12 is 5 flexural pivot distortional stress distribution map of the embodiment of the present invention.
Figure 13 is 5 flexural pivot radial stress distribution map of the embodiment of the present invention.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, it is no intended to limit of the invention
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1
Referring to Fig. 3~7, the present embodiment provides a kind of closed hollow core shaft, including mandrel main body 4, which is
The hollow structure 7 of both ends open, 4 both ends of mandrel main body are equipped with the connection structure 5 of closed above-mentioned hollow structure 7.In the present embodiment,
The length of hollow core shaft is 167mm, and mandrel principal length is 62mm.
In the present embodiment, mandrel main body 4 is the cydariform hollow structure of equal wall thickness, and connection structure 5 is flat structure, mandrel master
4 both ends of body by common welding procedure (such as friction welding (FW) or manual welding, the present embodiment using friction welding (FW) weld) with connect
Structure welding is integral, and the drum organization of mandrel main body 4 is rotary structure, is welded and fixed in connection structure 5 with mandrel main body 4
Position be also rotary structure, two rotary structure diameters are identical, in the present embodiment the diameter of rotary structure be 33mm.
In the present embodiment, 4 outer surface of mandrel main body is offset inward certain thickness and forms 7 profile of boring structure, internal
Hollow contour structure with outer surface be it is identical, 4 outer surface diameter of the present embodiment core shaft body is 62mm, mandrel main body wall thickness
For 5mm.
In the present embodiment, the hollow structure 7 of mandrel main body 4 uses tube forming, and the process that can be used is interior height
Molded, rotary press modelling, pressurising upsetting shape etc., can also be machining with bar.Connection structure is using forging or casting and forming
It is prepared.
In the present embodiment, connection structure 5 is equipped with bolt hole 6, diameter of bolt hole 19mm, separately equipped with compatible therewith
Bolt (not shown) and nut (not shown), for for vibration damping flexural pivot is fixed on system unit.
In the present embodiment, mandrel material is 40Cr, can be substituted with other high-strength steel, such as 42CrMo, also be can be replaced common
Structural carbon steel, such as 45#Steel.
Embodiment 2
Referring to Fig. 8, the present embodiment provides a kind of closed hollow core shaft, including mandrel main body, mandrel main body is opened for both ends
The hollow structure of mouth, mandrel main body both ends are equipped with the connection structure of closed above-mentioned hollow structure.
In the present embodiment, mandrel main body is the cylindrical structure of equal wall thickness, and boring structure is cylindrical structure, connection knot
Structure is flat structure, and mandrel main body both ends are welded by common welding procedure (such as friction welding (FW) or manual welding) and flat structure
It is connected into one, the position that flat structure and mandrel main body are welded is revolving body, and joint both sides rotary structure diameter is identical.
In the present embodiment, connection structure is equipped with bolt hole, another equipped with compatible bolt (not shown) and nut therewith
(not shown), for for vibration damping flexural pivot is fixed on system unit.
Embodiment 3
Referring to Fig. 9, the present embodiment provides a kind of vibration damping flexural pivots, and including the mandrel 1 in embodiment 1, housing 3 and vulcanization are outside
Rubber layer 2 between set 3 and mandrel 1.
In the present embodiment vibration damping flexural pivot forming process the following steps are included:
S1. pre-treatment: the surface paint that metal core axle 1 and housing 3 are respectively combined with rubber layer 2 is placed in mold
In；
S2. it preheats: mold is preheated to 160 DEG C；
S3. vulcanize: rubber injection is into mold, dwell pressure 170MPa, dwell time 15min；
S4. depanning: opening mold, takes out product；
S5. it cools down: being cooled to room temperature to obtain finished product.
Embodiment 4
The present embodiment provides a kind of vibration damping flexural pivot, the mandrel main body of the vibration damping flexural pivot core axis is solid, hollow structure
Inside in axial direction it is equipped with the middle part plug (diameter 23mm) through hollow structure, vibration damping flexural pivot in other structures and embodiment 3
Structure it is identical.
Embodiment 5
The present embodiment provides a kind of vibration damping flexural pivot, the mandrel main body of the vibration damping flexural pivot core axis be it is hollow, with a thickness of 4mm,
The middle part plug (diameter 23mm) through hollow structure is in axial direction equipped in hollow structure, in other structures and embodiment 3
The structure of vibration damping flexural pivot is identical.
Comparative example 1
The present embodiment provides a kind of vibration damping flexural pivot, the mandrel main body of the vibration damping flexural pivot core axis be it is solid, other structures with
The structure of vibration damping flexural pivot is identical in embodiment 3.
Embodiment 6
The present embodiment provides the modeling and analyzings of embodiment 3~5 and comparative example 1, specifically includes the following steps:
Y1. it models: generating the simulation analysis model of 4 flexural pivots according to the flexural pivot data of embodiment 3~5 and comparative example 1, such as
Shown in Figure 10, it is set to a, b, c, d, in which: a corresponds to comparative example 1, is solid spherical hinge structure；B corresponding embodiment 4 is hollow
Core shaft structure, thickness 5mm, middle part diameter of mandrel 23mm；C corresponding embodiment 3 is hollow core shaft structure, hollow, thickness 5mm；d
Corresponding embodiment 5 is hollow core shaft structure, thickness 4mm, middle part diameter of mandrel 23mm.
Y2. mandrel load testing: being rigid under conventional operating condition referring to calculating with solid flexural pivot in the present embodiment test process
Degree and intensity, fixed central spindle both ends obtain flexural pivot rigidity stress envelope (referring to figure to radial loaded 100KN in the middle part of mandrel respectively
11), distortional stress distribution map (referring to Figure 12) and radial stress distribution map (referring to Figure 13).
Y3. table 1 is calculated according to the above results, table 1 is flexural pivot performance parameter table, in which: a, b, c, d respectively correspond comparison
Example 1, embodiment 4, embodiment 3 and embodiment 5.
Table 1
The lightweight requirements of vibration damping flexural pivot mitigate weight under the premise of meeting strength character and cost, meet strength character
Bearing load is shown as herein under the yield limit of flexural pivot, keeps the normal use and service life of flexural pivot.The present embodiment is logical
It crosses and 4 kinds of spherical hinge structures and characteristic distributions loaded is analyzed, in which: analysis comparative example 1 is it can be found that real under loaded state
The mechanical model of heart metal core axle flexural pivot is simply supported beam, and mechanics shows as the fixed middle part stress in both ends, it may be assumed that mandrel center outer surface
Larger relative to internal stress, inside is to load bearing contribution amount very little.The present invention sets empty for mandrel body interior
Core structure, the weight of mandrel main body account for 50% or so of entire mandrel, and the weight of mandrel main body is lighter, and the weight of entire mandrel is got over
Gently, in embodiment 3~5, mandrel main body both ends are the flat structure of solid connection, and mandrel main body obtains after being set as hollow structure
Be closed hollow flexural pivot, difference is: being wherein not provided with plug in embodiment 3 in hollow structure, embodiment 4 and implements
Example 5 is in axial direction equipped with plug, thus bring effect: increasing plug and is promoted axially by weight bearing power, but matter at the same time
Amount increases, and is unfavorable for flexural pivot lightweight.According to above-mentioned emulation testing, flexural pivot radial load in the middle part of 100KN in embodiment 3~5
Under, all ensure that the lightweight for realizing flexural pivot under the premise of the requirement of structural strength performance, wherein be not provided with middle part core
Mandrel loss of weight in the embodiment 3 of stick is even more to reach 39%.
Mandrel main body is arranged to hollow structure by vibration damping flexural pivot of the invention, and mandrel main body both ends are solid connection knots
Structure obtains closed hollow core shaft and vibration damping flexural pivot, while guaranteeing structural strength performance requirement, reduces material cost,
While synthesis reduces cost of goods manufactured, lightweight is realized, there is huge economic benefit and social effect.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc. should be included within scope of the invention.
Claims (11)
1. a kind of closed hollow core shaft, the mandrel includes mandrel main body, which is characterized in that the mandrel main body is opened for both ends
The hollow structure of mouth, mandrel main body both ends are equipped with the connection structure of the closed hollow structure.
2. closed hollow core shaft according to claim 1, which is characterized in that the outer surface of the mandrel main body is biased inwardly
It moves certain thickness and forms boring structure outline, the every place in the outer surface offset thickness is identical.
3. closed hollow core shaft according to claim 1, which is characterized in that the outer surface of the mandrel main body is biased inwardly
It moves, forms the boring structure of gradient thickness.
4. closed hollow core shaft according to claim 3, which is characterized in that the changing rule of the thickness is that middle part is thin
Both ends are thick.
5. closed hollow core shaft according to claim 1, which is characterized in that the mandrel main body is drum organization.
6. closed hollow core shaft according to claim 1, which is characterized in that the connection structure is flat structure.
7. closed hollow core shaft according to claim 1, which is characterized in that the mandrel main body and with the mandrel master
The contact portion of the connected connection structure of body is rotary structure.
8. closed hollow core shaft according to claim 1, which is characterized in that the connection structure is equipped with fastening dress
It sets, the clamp device is arranged to for mandrel being fixed on system unit.
9. described in any item closed hollow core shafts according to claim 1~8, which is characterized in that the hollow structure is equipped with
Through the plug of hollow structure.
10. closed hollow core shaft according to claim 9, which is characterized in that the plug is along hollow structure axial direction side
To setting.
11. a kind of vibration damping flexural pivot using any one of claim 1~10 mandrel, which is characterized in that including mandrel, housing
And vulcanization is bonded in the elastomeric layer between mandrel and housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820466105.XU CN208503253U (en) | 2018-04-03 | 2018-04-03 | A kind of closed hollow core shaft and the vibration damping flexural pivot using the mandrel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820466105.XU CN208503253U (en) | 2018-04-03 | 2018-04-03 | A kind of closed hollow core shaft and the vibration damping flexural pivot using the mandrel |
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| CN208503253U true CN208503253U (en) | 2019-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019243649A3 (en) * | 2018-06-22 | 2020-02-20 | Fagor Ederlan, S.Coop. | Suspension component of an automotive vehicle |
| CN113071054A (en) * | 2021-04-09 | 2021-07-06 | 安庆汇通汽车部件股份有限公司 | Novel rubber spherical hinge mold opening mode forming device and opening method thereof |
-
2018
- 2018-04-03 CN CN201820466105.XU patent/CN208503253U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019243649A3 (en) * | 2018-06-22 | 2020-02-20 | Fagor Ederlan, S.Coop. | Suspension component of an automotive vehicle |
| CN113071054A (en) * | 2021-04-09 | 2021-07-06 | 安庆汇通汽车部件股份有限公司 | Novel rubber spherical hinge mold opening mode forming device and opening method thereof |
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