CN106739894B - A kind of car hyperbolic suspension frame structure and its design method - Google Patents

A kind of car hyperbolic suspension frame structure and its design method Download PDF

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Publication number
CN106739894B
CN106739894B CN201611190913.XA CN201611190913A CN106739894B CN 106739894 B CN106739894 B CN 106739894B CN 201611190913 A CN201611190913 A CN 201611190913A CN 106739894 B CN106739894 B CN 106739894B
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China
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mrow
hyperbolic
msub
cross
frame structure
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CN106739894A (en
Inventor
那景新
任俊铭
苏亮
吴长风
王登峰
刘浩垒
浦垒鑫
杨佳宙
纪俊栋
袁正
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Jilin University
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Jilin University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B60G2202/1524—Pneumatic spring with two air springs per wheel, arranged before and after the wheel axis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The invention discloses a kind of car hyperbolic suspension frame structure, including：Left hyperbolic beam；Overhanging beam；Right hyperbolic beam, it includes：U-shaped portion, it is recessed U-shape structure；Overhanging beam, it connects with the U-shaped portion both ends circular arc transition part, and the overhanging beam is to vehicle body outside and is stretched out obliquely with inclination angle；Two cross-ties, it is separately positioned between left hyperbolic beam and right hyperbolic beam, cross-tie is hinged with arc transition portion, the present invention uses two cross-ties, mitigate architecture quality, so as to be advantageous to lightweight, and also further reduce compared to the moment of flexure born on U-shape structure such as hyperbolic beam U-shaped portion vertical beam, and provide hyperbolic suspension design method, provide minimum chi calculation formula needed for hyperbolic beam parts load-bearing, the longitudinal pitch required compared to the arrangement form present invention of conventional c beam air spring shortens, so as to be advantageous to increase the volume in luggage compartment space, it ensure that technique is relatively simple, production cost is more cheap.

Description

A kind of car hyperbolic suspension frame structure and its design method
Technical field
The present invention relates to suspension frame structure, more particularly to a kind of car hyperbolic suspension frame structure and a kind of car hyperbolic suspension frame structure Design method.
Background technology
Traditional car largely uses C-type beam structure design, and car C-type beam stress in each operating mode traveling is complex, There is also certain moment of torsion while moment of flexure being present, and moment of torsion is delivered to when on back axle and adds back axle to a certain extent Moment of flexure, simultaneously because structure limits, make left and right gas spring spacing smaller, reduce the roll stiffness of vehicle, and front and rear gas spring institute The longitudinal pitch needed is larger, so as to occupy certain luggage compartment space.For the place that above-mentioned design is not very perfect, this hair A person of good sense once proposed a kind of double-U-shaped suspension frame structure in patent 201410063564.X, between longitudinal direction of the structure by reducing gas spring Away from and increase gas spring horizontal spacing, the space for being not only the effectively increased luggage compartment but also inclination for effectively increasing vehicle body is firm Degree, so as to be advantageous to the light-weighted realization of vehicle.Under steam compared to c-type structure, flexion torsion stress exists simultaneously simultaneously, The problem of required sectional dimension is larger, this U-shaped suspension frame structure only exists moment of torsion, therefore can suitably reduce sectional dimension, favorably In the lightweight of structure.But the vertical beam of this suspension frame structure U-shaped portion still suffers from certain moment of flexure, while the U-shaped crossbeam of bottom Larger moment of flexure be present, so that two root long longerons being attached thereto have certain moment of torsion, light weight effect is still not ideal enough. Therefore, the present invention proposes a kind of new hyperbolic type car suspension frame structure light-weight design.
The content of the invention
Hyperbolic suspension frame structure provided by the invention, eliminates front and rear cross member, using two cross-ties, makes architecture quality Mitigate, so as to be advantageous to lightweight, and compared to the moment of flexure born on U-shape structure such as hyperbolic beam U-shaped portion vertical beam Further reduce.
Hyperbolic suspension design method provided by the invention, provide minimum chi calculation formula, phase needed for hyperbolic beam parts load-bearing The longitudinal pitch more required than the arrangement form present invention in conventional c beam air spring shortens, so as to be advantageous to increase luggage compartment The volume in space, it ensure that technique is relatively simple, production cost is more cheap.
Technical scheme provided by the invention is：
A kind of car hyperbolic suspension frame structure, including：
Left hyperbolic beam, it includes：
U-shaped portion, it is recessed U-shape structure；
Overhanging beam, it connects with the U-shaped portion both ends circular arc transition part, and the overhanging beam is on the outside of vehicle body and obliquely band There is inclination angle stretching；
Right hyperbolic beam, it includes：
U-shaped portion, it is recessed U-shape structure；
Overhanging beam, it connects with the U-shaped portion both ends circular arc transition part, and the overhanging beam is on the outside of vehicle body and obliquely band There is inclination angle stretching；
Two cross-ties, it is separately positioned between the left hyperbolic beam and the right hyperbolic beam, the cross-tie It is hinged with the arc transition portion, wherein, be hinged diameter parallel is in the longitudinal axis of car.
Preferably, in addition to back axle fixed mount, it is arranged in the middle part of the U-shaped portion, including：
Reinforcing plate, it is rhombus, the upper and lower surface being arranged in the middle part of the U-shaped portion；
Boss, it is arranged between the reinforcing plate；
Strap, it is arranged on the back axle position；
Bolt, it is arranged on the strap bottom, and runs through the boss and the reinforcing plate.
Preferably, the cross-tie, including：
Pull bar, the pull bar both ends have oppositely oriented screw thread；
Link, it is that one end has the framework of opening, and the framework portion of remaining silent is provided with screwed hole, the screwed hole with The screw thread coordinates, so that the link is connected to the pull bar both ends, the frame openings portion and the arc transition portion It is be hinged.
Preferably, in addition to lock-nut, it is set on the pull bar.
Preferably, there is hexagonal projection, in order to being threaded into for pull bar both ends on the pull bar.
Preferably, the overhanging beam uses variable cross-section rectangular steel tube.
Preferably, plane is higher than back axle on the hyperbolic beam highest point, so that keel still are able to realize front and rear insertion, no The strength and stiffness of vehicle can be reduced.
Preferably, it is welding steel at the top of the overhanging beam, and air spring is set on the welding steel, relatively Damper is set on the inside of the air spring.
Preferably, in addition to：
V-type push rod, its one end are fixed on rear axle case by fixed-bearing, and the other end is connected by rubber packing and vehicle body Connect, to control the relative motion between vehicle body and back axle；
Trailing link, it is arranged on the fixed mount of the back axle both sides, and the trailing link is connected by rubber packing It is connected to vehicle body.
A kind of car hyperbolic suspension frame structure design method, including following size：
The minimum diameter of cross-tie,
Wherein, F be whole suspension on axle load, L1For the distance of gas spring to corner, L2Corner is to hyperbolic beam chassis Distance, σsFor the yield limit of steel；N is safety coefficient；KvFor Dynamic factor；
The minimum constructive height h of non-uniform beam outermost cross section1Calculation formula be,
Wherein, t is steel pipe thickness, and B is the cross-sectional width of rectangular steel pipe；
The minimum constructive height h of non-uniform beam most inner side corner cross section2Calculation formula be,
Wherein, t is steel pipe thickness, and B is the cross-sectional width of rectangular steel pipe；
Variable cross-section rectangular beam with it is horizontal will into angle calculation formula be：
Wherein, h is the height of gas spring.
Beneficial effects of the present invention
1st, the design can integrally reduce the moment of flexure of hyperbolic beam and effectively reduce the moment of flexure passed on back axle；Especially by Control pull bar pretightning force go to balance moment of flexure make to be delivered to lowermost two longerons moment of torsion be zero so as to so that back axle almost Extra moment of flexure is not subjected to, and all components of suspension are all only acted on by the bending load in a direction, further letter The stress of suspension frame structure is changed, so as to be advantageous to the lightweight of back axle and hyperbolic beam suspension frame structure.
2nd, the design and compared to existing structure, eliminates front and rear cross member, the substitute is two transverse directions above Pull bar, mitigate architecture quality, so as to be advantageous to lightweight.And compared on U-shape structure such as hyperbolic beam U-shaped portion vertical beam The moment of flexure born also further reduces, and can suitably reduce sectional dimension during design, so as to be advantageous to lightweight.
3rd, the overhanging beam for the support air spring that hyperbolic beam both sides are extended using upper trimming and supplements the variable cross-section of plane, Uniform strength design, this welding arbitrary way can securely fix steel plate compared to other modes, and be not likely to produce destruction, compare Reduced in traditional design material therefor, so as to advantageously in lightweight.
4th, the arrangement form of the invention compared to C-type beam air spring, method for arranging of the invention increase air spring Horizontal spacing, vehicle roll stiffness is set further to be lifted, so as to the advantageously lightweight in terms of vehicle, compared to traditional C The longitudinal pitch that the arrangement form present invention of type beam air spring is required shortens, so as to be advantageous to increase the appearance in luggage compartment space Long-pending, used in hyperbolic beam suspension frame structure is that transverse and longitudinal rectangular beam and straight pull bar etc. ensure that technique is relatively simple, produces Cost is more cheap.
Brief description of the drawings
Fig. 1 is the installation diagram of hyperbolic suspension frame structure of the present invention.
Fig. 2 is the shaft side figure of hyperbolic suspension frame structure of the present invention.
Fig. 3 is the structural representation of cross-tie of the present invention.
Fig. 4 is the structural representation of back axle fixed mount of the present invention.
Fig. 5 be it is of the present invention be the overhanging non-uniform beam of hyperbolic beam structural representation.
Fig. 6 is hyperbolic girder construction stress diagram of the present invention.
Fig. 7 is back axle parameter schematic diagram of the present invention.
Fig. 8 is plane and back axle axis parameter schematic diagram on hyperbolic beam over-hang part of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text Word can be implemented according to this.
As shown in Figure 1-2, hyperbolic suspension frame structure provided by the invention, including：Left hyperbolic beam 110, right hyperbolic beam 120, horizontal stroke To pull bar 130 and back axle fixed mount 140.
Wherein, 120 symmetrical placement of left hyperbolic beam 110 and right hyperbolic beam, hyperbolic beam are included positioned at middle U-shaped portion, With the overhanging beam 150 for being arranged on both sides, hyperbolic beam middle part uses recessed U-shape structure, and the U-shaped area in middle part of left and right hyperbolic beam is put down Face should be parallel with the longitudinally asymmetric plane of vehicle, the both ends overhanging beam 150 to connect with U-shaped portion, overhanging beam 150 and with U-shaped portion both ends Arc transition connects, should to outside vehicle body lateral bend and obliquely with inclination angle stretch out, for strengthen mechanical strength hyperbolic beam use Rectangle steel.
As shown in figure 3, cross-tie 130 includes the front tension bar and back stay be arrangeding in parallel, the left He of hyperbolic beam 110 is arranged on Between right hyperbolic beam 120, be equipped with hole in the horizontal bent angle side of hyperbolic beam and insert fixing bolt 135, fixing bolt 135 with Link is connected, and cross-tie 130 includes：Link 131, its end have screwed hole, and link 131 is arranged on pull bar 132 Both ends；The both ends of pull bar 132 have oppositely oriented screw thread, so that cross-tie 130 can be in the screwed hole on link 131 Interior carry out spinning in and out, pull bar both sides are made to reach required pretightning force, pull bar both ends car has hexagonal projection 134, to facilitate with pulling Hand carries out spinning in and out, and the both ends of pull bar 132 are provided with lock-nut 133, after adjusting pretightning force, are entered with the lock-nut 133 on both sides Row locking simultaneously applies locking glue and is fixed, so as to eliminate the moment of torsion of hyperbolic beam bottom longeron.
As shown in figure 4, hyperbolic beam lowermost longeron upper and lower surface in left and right is arranged with reinforcing plate 141, and reinforcing plate is set Rhombus is set to, 4 bosses, 142,4 bolts are disposed between reinforcing plate and extend through reinforcing plate 141 and boss 142, spiral shell Bolt is arranged in inside and outside bottom girder, and is fixed on the strap 143 of back axle 180, such a to design both companies of ensure that Connect intensity and in turn ensure that the complete of longeron, as a preferred embodiment, plane is still higher than back axle 180 on hyperbolic beam highest point, so that Keel can still realize front and rear insertion, will not reduce intensity, the rigidity of vehicle.
As shown in figure 5, be connected in the middle part of U-shaped portion bottom girder on back axle fixed mount, hyperbolic beam overhanging beam 150 using becoming The design of section rectangular steel pipe, use it is wide, etc. the And of Varying Depth of wall thickness design and cut on the basis of air spring seat lower plane The inclined extension of curved beam, by straight plane steel plate 20 such as Fig. 5 welding supplement, i.e., rectangular steel pipe lower surface tilts stretches out breach And upper surface is cut on the basis of air spring base lower plane, and put down with what the welding supplement of plane steel plate 300 was cut Face breach, compared to being cut at other positions and welding supplement steel plate, the weld seam of such a mode is subjected only to downward compression, institute Can ensure that Interal fixation is firm and technique is also simple.Air spring base, 4 skies are disposed with the flat plate of cross-section Gas spring is arranged on base, and air spring 160 is arranged in the plane 30 of supplement, and air spring 160 is close to hyperbolic beam edge It is arranged, damper 170 is arranged relative to air spring inner side.
As a preferred embodiment, do not interfered in the non-uniform beam 150, air spring and tire motion for ensureing to stretch out Under the premise of, increasing the spacing of left and right air spring as far as possible improves vehicle roll stiffness, and reduces air before and after longitudinal direction as far as possible The spacing of spring, air spring axis is set to cut the inner side of vertical line so as to effectively increase the space of luggage compartment in tyre rim.
Vehicle frame both sides parallel arrangement biserial tire, the one end of V-type push rod 210 are fixed on rear axle case by fixed-bearing, The other end is connected by rubber packing with vehicle body, to control the relative motion between vehicle body and back axle.On back axle both sides fixed mount 140 Trailing link 220 is there also is provided, distance rod is connected to vehicle body by rubber packing, and it is the main portion that power is transmitted with keel Part, whole hyperbolic type suspension and cross-tie, back axle etc. constitute a kind of structure of rectangle, make whole rear overhang structure more steady Fixed, rigidity also accordingly improves, and cross sectional shape is uncomplicated, and technique is relatively simple, and light weight degree is further improved.
A kind of car hyperbolic suspension frame structure design method, including following size：
The minimum diameter of cross-tie,
Wherein, F be whole suspension on axle load, L1For the distance of gas spring to corner, L2Corner is to hyperbolic beam chassis Distance, σsFor the yield limit of steel；N is safety coefficient；KvFor Dynamic factor；
The minimum constructive height h of non-uniform beam outermost cross section1Calculation formula be,
Wherein, t is steel pipe thickness, and B is the cross-sectional width of rectangular steel pipe；
The minimum constructive height h of non-uniform beam most inner side corner cross section2Calculation formula be,
Wherein, t is steel pipe thickness, and B is the cross-sectional width of rectangular steel pipe；
Variable cross-section rectangular beam with it is horizontal will into angle calculation formula be：
Wherein, h is the height of gas spring.
Implement so that axle load on whole suspension is 15t as an example, calculate the size of hyperbolic suspension frame structure, be described further：
First, the size of pull bar is designed
By design pull bar size, it is necessary to know the pulling force that pull bar is born, and designed according to this patent at hyperbolic beam bottom Liang Chu requires that moment of torsion is zero, and the i.e. required pretightning force of pulling force on pull bar is thus determined.
As shown in fig. 6, the axle load F rounded on a suspension is 15t, 4 air springs are shared on back axle, act on a sky Power in gas springDistance L of the measured gas spring to corner1=0.4m, measured corner To the distance L of hyperbolic beam chassis2=0.3m, according to formula F1·L1=F2·L2Calculate F2=50KN；Further according to formula Calculate the size of pull bar；
Wherein, A is the area of section of cross-tie；σsFor the yield limit of steel, 256MPa is taken as here；N is safety Coefficient, 2 are taken as here；kvFor Dynamic factor, 2 are taken as here；
It is computed cross-sectional area A and is approximately equal to 804mm2；Further according to area formula π r2=A, can be calculated radius r is about 16mm, diameter D are 32mm.
2nd, after cross-tie and connecting frame structure manufacture are completed, repeatedly measurement be applied to torque T on hexagonal boss with Caused pulling force F on cross-tie2Numerical value, using torque T as abscissa, the pulling force F on pull bar2Drawn for ordinate And matched curve passes through calculated prefastening force F so as to find out the relation curve between them2Value 50KN, and between them Relation curve, so as to find required prefastening torque T values, the spanner torsion to be applied during instructing actual production to install Value.
3rd, as seen in figs. 5-6, the size example calculation non-uniform beam outermost for designing hyperbolic beam over-hang part non-uniform beam is horizontal The minimum constructive height h in section1；
It should ensure that outermost the maximum shear stress meets the 3rd strength theory i.e.By formula
F1To act on the power on an air spring i.e. 37500N；The cross-sectional width B of rectangular steel pipe is set to definite value here It is taken as 120mm；Steel pipe thickness t is taken as 8mm through measurement；σs344Mpa is taken as herein for the yield limit of steel；kvFor dynamic loading system Number, is taken as 2；N is safety coefficient, is taken as 2；
It is computed obtaining minimum h herein1It is worth and is approximately equal to 79mm for 0.0786m, is taken as 79mm.
4th, the minimum constructive height h of non-uniform beam most inner side corner cross section is calculated2；
Because direct stress herein will be significantly greater than shearing stress so should ensure that steel not over direct stress allowable,
L1Length for most inner side corner apart from gas spring, the i.e. length of non-uniform beam are taken as 0.4m herein；σsFor steel Yield limit is taken as 344Mpa herein；Steel pipe thickness t is taken as 8mm through measurement；The cross-sectional width B of rectangular steel pipe, it is set to fixed here Value is taken as 120mm；kvFor Dynamic factor, 2 are taken as；N is safety coefficient, is taken as 2.
It is computed obtaining minimum h herein2It is worth for 175mm；Height i.e. herein is taken as 175mm.
5th, by the minimum constructive height h of non-uniform beam outermost cross section1With non-uniform beam most inner side corner cross section most Low height h2, the height value in fixed width on two positions is drawn, thus data are computed can obtain overhanging variable cross-section The angle value that beam should be bent；And it can determine wherein should cut rectangular beam upper surface and side；It can refer to Fig. 5 institutes A kind of method provided, concrete operations will be provided by following instance；
As shown in figure 5, h here1, h2Value both corresponds to step 3, four height values calculated, is also needed to before calculating Know the estimated arrangement height h values of gas spring, this value can be provided according to different designs situation by designer；Here h values are taken as 40mm, the coordinate value that coordinate system may know that 2 points of AB is established with the X Y shown in Fig. 5, specific data are provided by table one；
Table one
It by 2 points of coordinate value of A, B, can be fitted with once straight line, the equation and slope of straight line can be drawn, then led to The anti-triangle for crossing slope determines α angles, and it is about 19deg to be computed α values herein, as variable cross-section rectangular beam with it is horizontal will into Angle, that is, the angle to be bent are 19deg, and then h height is cut along X axis, finally with plane steel plate by breach Weld polishing.
6th, as Figure 7-8, based on tire contour dimension (D=1m), axle load and quality limit value, hyperbolic beam in this patent Following (the unit of suspension key dimension：Rice)：Air spring horizontal spacing L5=2；Air spring fore-and-aft distance L3=0.9；Back axle bridge Vertical distance L of the shell peak to back axle axis4=0.26；Vertical distance L of the plane to back axle axis on hyperbolic beam over-hang part6 =0.29；Wheel outermost width L7=2.6；The sectional dimension of U-shaped portion rectangle steel is 120*175mm, and thickness t is 7mm；It is local The thickness of strengthening version 16 is 7mm；Local strengthening block size is 100*50mm, is highly 80mm.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, it is of the invention and unlimited In specific details and shown here as the legend with description.

Claims (10)

  1. A kind of 1. car hyperbolic suspension frame structure, it is characterised in that including：
    Left hyperbolic beam, it includes：
    U-shaped portion, it is recessed U-shape structure；
    Overhanging beam, it connects with the U-shaped portion both ends circular arc transition part, and the overhanging beam is to carrying on the outside of vehicle body and obliquely and incline Angle is stretched out；
    Right hyperbolic beam, it includes：
    U-shaped portion, it is recessed U-shape structure；
    Overhanging beam, it connects with the U-shaped portion both ends circular arc transition part, and the overhanging beam is to carrying on the outside of vehicle body and obliquely and incline Angle is stretched out；
    Two cross-ties, it is separately positioned between the left hyperbolic beam and the right hyperbolic beam, the cross-tie and institute Arc transition portion is stated to be hinged, wherein, be hinged diameter parallel is in the longitudinal axis of car.
  2. 2. hyperbolic suspension frame structure according to claim 1, it is characterised in that also including back axle fixed mount, it is arranged on institute State in the middle part of U-shaped portion, including：
    Reinforcing plate, it is rhombus, the upper and lower surface being arranged in the middle part of the U-shaped portion；
    Boss, it is arranged between the reinforcing plate；
    Strap, it is arranged on the back axle position；
    Bolt, it is arranged on the strap bottom, and runs through the boss and the reinforcing plate.
  3. 3. hyperbolic suspension frame structure according to claim 1 or 2, it is characterised in that the cross-tie, including：
    Pull bar, the pull bar both ends have oppositely oriented screw thread；
    Link, it is that one end has the framework of opening, and the framework portion of remaining silent is provided with screwed hole, the screwed hole with it is described Screw thread coordinates, so that the link is connected to the pull bar both ends, the frame openings portion is hinged with the arc transition portion.
  4. 4. hyperbolic suspension frame structure according to claim 3, it is characterised in that also including lock-nut, it is set in described On pull bar.
  5. 5. hyperbolic suspension frame structure according to claim 3, it is characterised in that there is hexagonal projection on the pull bar, so as to In being threaded into for pull bar both ends.
  6. 6. hyperbolic suspension frame structure according to claim 1, it is characterised in that the overhanging beam uses variable cross-section rectangular steel Pipe.
  7. 7. the hyperbolic suspension frame structure according to claim 1 or 6, it is characterised in that plane is high on the hyperbolic beam highest point In back axle, so that keel still are able to realize front and rear insertion, the strength and stiffness of vehicle will not be reduced.
  8. 8. the hyperbolic suspension frame structure according to claim 1 or 6, it is characterised in that it is welding steel at the top of the overhanging beam, And air spring is set on the welding steel, relative to setting damper on the inside of the air spring.
  9. 9. hyperbolic suspension frame structure according to claim 8, it is characterised in that also include：
    V-type push rod, its one end are fixed on rear axle case by fixed-bearing, and the other end is connected by rubber packing with vehicle body, To control the relative motion between vehicle body and back axle；
    Trailing link, it is arranged on the fixed mount of the back axle both sides, and the trailing link is connected to by rubber packing Vehicle body.
  10. 10. a kind of car hyperbolic suspension frame structure design method, usage right requires that the car hyperbolic in 1-9 described in any one is hanged Frame structure, it is characterised in that
    Use the minimum diameter of cross-tie for,
    <mrow> <mi>D</mi> <mo>=</mo> <mn>2</mn> <msqrt> <mfrac> <mrow> <mi>F</mi> <mo>&amp;CenterDot;</mo> <msub> <mi>L</mi> <mn>1</mn> </msub> <mo>&amp;CenterDot;</mo> <mi>n</mi> <mo>&amp;CenterDot;</mo> <msub> <mi>k</mi> <mi>v</mi> </msub> </mrow> <mrow> <mn>4</mn> <mi>&amp;pi;</mi> <mo>&amp;CenterDot;</mo> <msub> <mi>L</mi> <mn>2</mn> </msub> <mo>&amp;CenterDot;</mo> <msub> <mi>&amp;sigma;</mi> <mi>s</mi> </msub> </mrow> </mfrac> </msqrt> </mrow>
    Wherein, F be whole suspension on axle load, L1For the distance of gas spring to corner, L2Corner to hyperbolic beam chassis away from From σsFor the yield limit of steel；N is safety coefficient；KvFor Dynamic factor；
    The minimum constructive height h of non-uniform beam outermost cross section1Calculation formula be,
    <mrow> <mfrac> <mrow> <mn>3</mn> <mi>F</mi> <mo>&amp;CenterDot;</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>&amp;CenterDot;</mo> <mi>B</mi> <mo>&amp;CenterDot;</mo> <msub> <mi>h</mi> <mn>1</mn> </msub> <mo>+</mo> <msubsup> <mi>h</mi> <mn>1</mn> <mn>2</mn> </msubsup> <mo>)</mo> </mrow> </mrow> <mrow> <mn>4</mn> <mo>&amp;lsqb;</mo> <mi>B</mi> <mo>&amp;CenterDot;</mo> <msubsup> <mi>h</mi> <mn>1</mn> <mn>3</mn> </msubsup> <mo>-</mo> <mrow> <mo>(</mo> <mi>B</mi> <mo>-</mo> <mn>2</mn> <mi>t</mi> <mo>)</mo> </mrow> <msup> <mrow> <mo>(</mo> <msub> <mi>h</mi> <mn>1</mn> </msub> <mo>-</mo> <mn>2</mn> <mi>t</mi> <mo>)</mo> </mrow> <mn>3</mn> </msup> <mo>&amp;rsqb;</mo> </mrow> </mfrac> <mo>=</mo> <mfrac> <msub> <mi>&amp;sigma;</mi> <mi>s</mi> </msub> <mrow> <mi>n</mi> <mo>&amp;CenterDot;</mo> <msub> <mi>k</mi> <mi>v</mi> </msub> </mrow> </mfrac> </mrow>
    Wherein, t is steel pipe thickness, and B is the cross-sectional width of rectangular steel pipe；
    The minimum constructive height h of non-uniform beam most inner side corner cross section2Calculation formula be,
    <mrow> <mfrac> <mrow> <mn>3</mn> <mo>&amp;CenterDot;</mo> <mi>F</mi> <mo>&amp;CenterDot;</mo> <msub> <mi>L</mi> <mn>1</mn> </msub> </mrow> <mrow> <mn>2</mn> <mo>&amp;lsqb;</mo> <mi>B</mi> <mo>&amp;CenterDot;</mo> <msubsup> <mi>h</mi> <mn>2</mn> <mn>2</mn> </msubsup> <mo>-</mo> <mrow> <mo>(</mo> <mi>B</mi> <mo>-</mo> <mn>2</mn> <mi>t</mi> <mo>)</mo> </mrow> <msup> <mrow> <mo>(</mo> <msub> <mi>h</mi> <mn>2</mn> </msub> <mo>-</mo> <mn>2</mn> <mi>t</mi> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>&amp;rsqb;</mo> </mrow> </mfrac> <mo>=</mo> <mfrac> <msub> <mi>&amp;sigma;</mi> <mi>s</mi> </msub> <mrow> <mi>n</mi> <mo>&amp;CenterDot;</mo> <msub> <mi>k</mi> <mi>v</mi> </msub> </mrow> </mfrac> </mrow>
    Wherein, t is steel pipe thickness, and B is the cross-sectional width of rectangular steel pipe；
    Variable cross-section rectangular beam with it is horizontal will into angle calculation formula be：
    <mrow> <mi>&amp;alpha;</mi> <mo>=</mo> <mi>a</mi> <mi>r</mi> <mi>c</mi> <mi>t</mi> <mi>a</mi> <mi>n</mi> <mfrac> <mrow> <mo>&amp;lsqb;</mo> <msub> <mi>h</mi> <mn>2</mn> </msub> <mo>-</mo> <mrow> <mo>(</mo> <msub> <mi>h</mi> <mn>1</mn> </msub> <mo>-</mo> <mi>h</mi> <mo>)</mo> </mrow> <mo>&amp;rsqb;</mo> </mrow> <msub> <mi>L</mi> <mn>1</mn> </msub> </mfrac> </mrow>
    Wherein, h is the height of air spring.
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EP2105329A1 (en) * 2008-03-26 2009-09-30 Mazda Motor Corporation Suspension subframe structure of vehicle
CN201670264U (en) * 2010-05-13 2010-12-15 上海汇众汽车制造有限公司 Rear auxiliary frame for sample car
CN103879453A (en) * 2014-02-25 2014-06-25 吉林大学 Rear auxiliary frame structure of double-U shaped vehicle
CN203793419U (en) * 2014-02-25 2014-08-27 吉林大学 Double-U-shaped rear subframe structure of passenger car
CN206242837U (en) * 2016-12-21 2017-06-13 吉林大学 A kind of car hyperbolic suspension frame structure

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Publication number Priority date Publication date Assignee Title
EP2105329A1 (en) * 2008-03-26 2009-09-30 Mazda Motor Corporation Suspension subframe structure of vehicle
CN201670264U (en) * 2010-05-13 2010-12-15 上海汇众汽车制造有限公司 Rear auxiliary frame for sample car
CN103879453A (en) * 2014-02-25 2014-06-25 吉林大学 Rear auxiliary frame structure of double-U shaped vehicle
CN203793419U (en) * 2014-02-25 2014-08-27 吉林大学 Double-U-shaped rear subframe structure of passenger car
CN206242837U (en) * 2016-12-21 2017-06-13 吉林大学 A kind of car hyperbolic suspension frame structure

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