CN107642573A - A kind of longitudinal FRP composite material plate springs assembly - Google Patents
A kind of longitudinal FRP composite material plate springs assembly Download PDFInfo
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- CN107642573A CN107642573A CN201710829223.2A CN201710829223A CN107642573A CN 107642573 A CN107642573 A CN 107642573A CN 201710829223 A CN201710829223 A CN 201710829223A CN 107642573 A CN107642573 A CN 107642573A
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Abstract
The present invention relates to a kind of longitudinal FRP composite material plate springs and its assembly, including FRP composite material plate spring bodies, FRP composite material plate springs body includes body stage casing, parabola variable cross-section section and grasswort construction section；FRP composite material plate springs will not once complete rupture, ensure the security of vehicle traveling；The weight of plate spring suspension brackets is greatly reduced, improves fuel oil effect；Improve the ride comfort of vehicle traveling；Improve the structure of FRP composite material plate springs body and metal connecting piece, the reliability for improving longitudinal FRP composite material plate springs improves the life-span of longitudinal plate spring suspension brackets, it is more than the three times for making the life-span that the life-span of longitudinal FRP composite material plate springs suspension brings up to longitudinal leaf spring, do not have to change flexible member as leaf spring in the range of vehicle service life, significantly reduce leaf spring use cost；Gap is small between upper cover plate and lower bolster and U bolt, effectively prevents the swing of back axle stress, improves the stability of vehicle traveling.
Description
Technical field
The invention belongs to leaf springs of car technical field, particularly relates to a kind of longitudinal FRP composite material plate springs assembly.
Background technology
Leaf spring can be with longitudinal or horizontal on automobile.The latter is because longitudinal force will be transmitted, it is necessary to set additional
Load transfer device is oriented to, increases complicated, quality, so only being applied in a small number of light, minicars.Longitudinal leaf spring can pass
Various power and torque are passed, there is guide function, and it is simple in construction, therefore be used widely on automobile.
Composite is that two or more combinations of materials combine together, by effective interface between material, performance is better than
Original material.Composite species is a lot, for example reinforced concrete is also composite, and mixed mud is mother metal, and reinforcing bar is to increase
Strong material.But the composite of modern industry meaning is mainly glass fiber compound material (GFRP) and carbon fibre composite
(CFRP), mother metal is plastics (or being resin), and reinforcing material is glass fibre or carbon fiber, the enhancing of Modern Composite Materials leaf spring
Material is mainly glass fibre, also there is carbon fiber, and mother metal is mostly epoxy resin.
With development in science and technology, composite material plate spring is progressively used for automotive suspension spring element.What present leaf springs of car used
Composite is all FRP composites.FRP is that English Fibre-Reinforced Plastic write a Chinese character in simplified form, and literal translation is fiber reinforcement
Plastics.FRP composite specific strengths specific modulus is high, has good fatigue performance, damping vibration attenuation performance and decay resistance,
Therefore, leaf spring is done using FRP composites, the ride comfort and comfortableness of vehicle can be greatly improved, and quality is only leaf spring
1/4 or so, be not only effectively improved fuel oil effect, also reduce unsprung mass, reduce and vibrated under spring, while the life-span is steel
3 times or so of flat spring, flexible member need not be changed in the range of integeral vehicle life, vehicle uses and maintenance cost is relatively low.
FRP composite material plate spring body forming methods, including continuous fiber winding process, mould pressing process, pultrusion work
The processes such as skill, resin transfer molding technique (RTM).If pressure is low when FRP composite material plate spring sheets are body formed, make
With the easy running of composite material plate spring body of a period of time FRP, leaf spring is caused to fail.Using high-pressure resin Transfer molding work
Skill (HP-RTM), cavity pressure are up to 160 atmospheric pressure, not only ensure reliability, the performance of body, and will not running.
Present lot of domestic and international auto vendor wants to substitute existing longitudinal leaf spring with FRP composite material plate springs, still, longitudinal
Leaf spring both ends grasswort will be fixed on vehicle body by bushing, and middle part will be fixed on vehicle body by U bolt, it is necessary to pass through metal
The connection and fixation of part, these factors necessarily cause longitudinal FRP composite material plate springs local stress big, in the junction of grasswort and
Occur the phenomenon of fibrous fracture on the outside of U bolt, greatly influence the life-span of FRP composite material plate springs.
Include front lining 01, clip 02, leaf spring 03, centre bolt 04 as shown in Figure 1 for prior art steel plate spring assembly
And back bush 05；Steel plate spring assembly is formed by stacking by multi-disc variable cross-section or uiform section leaf spring, but the leaf spring of existing technology
Quality is big, and fuel oil effect is low, and short life, ride comfort is poor, and unsprung mass is big, is vibrated under spring big.
A kind of automotive composite material plate spring assembly diagram is illustrated in figure 2, sees CN104976261A, a kind of automobile is compound
The schematic diagram of plate of material main assemblage of spring and its assembly method, including U-bolt metal splint 06, upper metal splint, preceding metal connect
First 07, composite material plate spring spring body 08, lower metal splint 09, rear metal joint 010 and bolt 011；Composite material plate spring
Spring body and preceding metal joint, rear metal joint, lower metal splint junction stress are big, easily cause the mistake of composite material plate spring spring body
Effect, global reliability reduce；The shape of composite material plate spring spring body and load relation are unclear, it is impossible to ensure its security；With
Suspension ambiguity.
The content of the invention
It is an object of the invention to provide a kind of longitudinal FRP composite material plate springs assembly, to solve the combustion of prior art leaf spring
Oily poor efficacy, the problem of life-span is low and reliability is not high.
The present invention is achieved by the following technical solutions：
A kind of longitudinal FRP composite material plate springs, including FRP composite material plate spring bodies, the FRP composite material plate springs sheet
Body includes body stage casing, parabola variable cross-section section and grasswort construction section；
When the FRP composite material plate springs body extends from one end to the other end, successively including the grasswort construction section, institute
State parabola variable cross-section section, the body stage casing, the parabola variable cross-section section and the grasswort construction section；
Upper and lower surface in the body stage casing descends extension to form erecting bed and supporting table upwards respectively；In the erecting bed
On be provided with counterbore, be provided with lower counterbore in the supporting table；
Bolt through-hole is provided with each grasswort construction section；
The FRP composite material plate springs body is more than the upper counterbore from the length of center to the front end of the upper counterbore
The length of center to rear end.
The both ends of the erecting bed and the both ends of the supporting table are existed by inclined-plane and body stage casing transition bonding
Together, and in junction it is provided with fillet.
The center of circle of the upper counterbore is respectively positioned on the median vertical line in the body stage casing with the center of circle of the lower counterbore；It is described
The diameter of lower counterbore is more than the diameter of the lower counterbore.
The thickness that the parabola variable cross-section section is connected one end with the body stage casing is h2, one is connected with grasswort construction section
The thickness at end is h1；
h1Determined by formula (1),
Wherein, [τ] is shear stress allowable；Pmax is that FRP composite material plate springs body acts on volume in use
The maximum force at ear center；B is the width of FRP composite material plate spring bodies；λ is safety coefficient, more than 1.2；
h2Determined by formula (2),
Wherein, l1 is distance of the parabola variable cross-section section thinnest part to grasswort center；L2 is that parabola variable cross-section section is most thick
Locate the distance to grasswort center.
The grasswort construction section is square, and the thickness of the grasswort construction section is more than the parabola variable cross-section section and institute
State the thickness that grasswort construction section connects one end.
A kind of longitudinal FRP composite material plate springs assembly, including the longitudinal FRP composite material plate springs described in any of the above-described,
Also include preceding grasswort, preceding external bushing, preceding neck bush, front axle tube, upper cover plate, lower bolster, rear grasswort, rear external bushing, rear neck bush
And rear axle tube；
The preceding grasswort and the rear grasswort are individually fixed in the rear and front end of the FRP composite material plate springs；
The preceding external bushing, the preceding neck bush and the front axle tube may be contained within the preceding grasswort；
External bushing, the rear neck bush and the rear axle tube may be contained within the rear grasswort after described.
The preceding grasswort is identical with the structure of the rear grasswort, including arc surface, transition circle cambered surface and lower planes；Institute
State arc surface, the transition circle cambered surface and the lower planes and form circular hole and square groove；
The centerline collineation of the center line of the circular hole and the arc surface；It is provided with the lower planes relative
Bolt through-hole；
Wherein, the Circularhole diameter of preceding grasswort is more than the Circularhole diameter of the rear grasswort.
The preceding external bushing includes the inner cylinder sulfided and rubber layer, the inner cylinder are located at the interior of the rubber layer
Side；
The inner cylinder is the face of cylinder, be provided with the inner cylinder axially through breach；
The rubber layer includes cylinder body and the small circle ring in described cylinder body one end.
The upper cover plate is groove profile, and via is provided with the upper cover plate center；Middle place is provided with the lower bolster
Via, lower alignment pin is provided with the via；
The upper cover plate is identical with the outside width of the lower bolster, lateral thickness=(s-b-0.8)/2, and wherein s is U-shaped
Spacing on the inside of bolt, b are the width of FRP composite material plate spring bodies.
Also include backing plate, via is provided with the center of the backing plate, alignment pin is provided with the via,
The side at the both ends of the backing plate is provided with four arc surfaces, and the both ends of the backing plate upwarp.
The beneficial effects of the invention are as follows：
FRP composite material plate springs will not once complete rupture, ensure the security of vehicle traveling；Plate spring suspension brackets are greatly reduced
Weight, improve fuel oil effect；Improve the ride comfort of vehicle traveling；Improve FRP composite material plate springs body and metal connecting piece
Structure, the reliability for improving longitudinal FRP composite material plate springs improves the life-span of longitudinal plate spring suspension brackets, makes longitudinal FRP composite woods
More than the three times in the life-span that the life-span of material plate spring suspension brackets brings up to longitudinal leaf spring, do not have to more in the range of vehicle service life
Flexible member as leaf spring is changed, significantly reduces leaf spring use cost；Gap is small between upper cover plate and lower bolster and U bolt,
The swing of back axle stress is effectively prevented, improves the stability of vehicle traveling.
Brief description of the drawings
Fig. 1 is prior art steel plate spring assembly schematic diagram；
Fig. 2 is prior art automotive composite material plate spring assembly diagram；
Fig. 3 is the schematic diagram of FRP composite material plate spring body constructions；
Fig. 4 is the front view of FRP composite material plate spring bodies；
Fig. 5 is Fig. 4 A-A sectional views；
Fig. 6 is Fig. 4 B-B sectional views；
Fig. 7 is the schematic diagram of longitudinal FRP composite material plate springs assembly；
Fig. 8 is Fig. 7 front view；
Fig. 9 is Fig. 8 C-C sectional views；
Figure 10 is preceding external bushing schematic diagram；
Figure 11 is preceding neck bush schematic diagram；
Figure 12 is that front lining is pressed schematic diagram；
Figure 13 is Fig. 8 D-D sectional views；
Figure 14 is Fig. 8 E-E sectional views；
Figure 15 is Fig. 8 F-F sectional views；
Figure 16 is enlarged drawing at Fig. 9 I；
Figure 17 is enlarged drawing at Fig. 9 II；
Figure 18 is FRP composite material plate spring scheme of installations；
Figure 19 is backing plate schematic diagram；
Figure 20 is Figure 18 H-H sectional views.
Description of reference numerals
01 front lining, 02 clip, 03 leaf spring, 04 centre bolt, 05 back bush, 06U type bolt metal clamping plates, metal before 07
Joint, 08 composite material plate spring spring body, 09 time metal splint, metal joint after 010,011 bolt, 1FRP composite material plate spring sheets
Body, 100 body stage casings, 101 erecting beds, counterbore on 102,103 supporting tables, 104 parabola variable cross-section sections, 105 grasswort construction sections,
106 lower counterbores, 107 middle part chamferings, 108 vias, grasswort before 2, external bushing before 3,31 inner cylinders, 32 rubber layers, neck bush before 4, before 5
Central siphon, 6 upper cover plates, 61 vias, 7 lower bolsters, 71 times alignment pins, grasswort after 8,81 arc surfaces, 82 transition circle cambered surfaces, about 83 is flat
Face, 84 circular holes, 85 square grooves, 86 bolt through-holes, external bushing after 9, neck bush after 10,11 rear axle tubes, 12 vehicle frames, 13 fore-stocks,
Bearing pin before 14,15U shape bolts, 16 back axles, 161 leaf spring brackets, 17 backing plates, alignment pin on 171,172 arc surfaces, 173 upwarp, and 18
Rear pin shaft, 19 hangers, 20 after-poppets.
Embodiment
Describe technical scheme in detail by the following examples, following embodiment be only it is exemplary, only
Explanation and illustration technical scheme can be used for, and be not to be construed as the limitation to technical solution of the present invention.
It is exactly the flexible member machine of longitudinal plate spring suspension brackets the present invention relates to the suspension parts mechanism of vehicle
Structure.The present invention will replace existing steel plate on the premise of the Performance And Reliability of longitudinal leaf spring is ensured with FRP composite material plate springs
Spring；Improve the structure of FRP composite material plate springs body and metal connecting piece, improve the reliable of longitudinal FRP composite material plate springs
Property；FRP composite material plate spring bodies shear strength allowable is relatively low, according to the optimised of FRP composite material plate spring body stress
Structure, fully ensure that life-span and the security of suspension；The weight of plate spring suspension brackets is greatly reduced, improves fuel oil effect；Improve vehicle
The ride comfort of traveling；Improve the life-span of longitudinal plate spring suspension brackets, make longitudinal FRP composite material plate springs suspension life-span bring up to it is longitudinal
More than the three times in the life-span of leaf spring, do not have to change flexible member as leaf spring in the range of vehicle service life, significantly
Reduce leaf spring use cost.
The technical program provides a kind of longitudinal FRP composite material plate springs, as shown in Figures 3 to 6, including FRP composites
Leaf spring body, FRP composite material plate springs body include body stage casing, parabola variable cross-section section and grasswort construction section.
When FRP composite material plate springs body extends from one end to the other end, become including grasswort construction section, parabola cut successively
Face section, body stage casing, parabola variable cross-section section and grasswort construction section.
The upper and lower surface of section descends extension to form erecting bed and supporting table upwards respectively in the body；It is provided with erecting bed
Upper counterbore, is provided with lower counterbore in supporting table.
Bolt through-hole is provided with each grasswort construction section.
FRP composite material plate springs body is more than center to the rear end of upper counterbore from the length of the center of upper counterbore to front end
Length.
The present invention also provides a kind of FRP composite material plate springs assembly, including FRP composite material plate springs body 1, preceding grasswort 2,
Preceding external bushing 3, preceding neck bush 4, front axle tube 5, upper cover plate 6, lower bolster 7, rear grasswort 8, rear external bushing 9, rear neck bush 10, rear axle
Pipe 11 etc..
FRP composite material plate springs body 1 for the process such as high-pressure resin Transfer molding technique (HP-RTM) into
The wide FRP composites tabular structure of type, anterior-posterior length is different, and preceding segment length is lfSegment length is l afterwardsr, lf≥lr, respectively
Including body stage casing 100, erecting bed 101, upper counterbore 102, supporting table 103, parabola variable cross-section section 104, grasswort construction section
105th, lower counterbore 106, middle part chamfering 107, bolt through-hole 108, as shown in Figures 3 to 6.
The thickness in body stage casing 100 is h2, there is erecting bed 101 top of body stage casing 100, and the thickness of erecting bed 101 is hu,
The both ends of erecting bed 101 are by 45 ° of inclined-plane together with the transition bonding of body stage casing 100, and there is fillet junction, to reduce body
There is upper counterbore 102 at stress between stage casing 100 and parabola variable cross-section section 104, the middle part of erecting bed 101, and depth is about hu, top has
Middle part chamfering 107, as shown in Figures 3 to 6.
Equally, there is supporting table 103 lower section of body stage casing 100, and the thickness of supporting table 103 is hl, the both ends of supporting table 103 pass through
Together with the transition bonding of body stage casing 100, there is fillet junction on 45 ° of inclined-plane, is become with reducing body stage casing 100 and parabola
There is lower counterbore 106 at stress between section 104, the middle part of supporting table 103, and depth is about hl, have middle part chamfering 107 below, sink
The diameter in hole 106 is more than upper counterbore 102, as shown in Figures 3 to 6.
Parabola variable cross-section section 104 is the important performance section of FRP composite material plate springs, can be according to operation principle described later
Formula (1), (2) determine the thinnest part thickness h of parabola variable cross-section section 1041With thickness thickness h2, then according to target rigidity
Value, suitably adjusts h1And h2, and finally determine h1And h2, as shown in Figures 3 to 6.
Grasswort construction section 105 is square, thickness hd, hd＞ h1, i.e., it is slightly above parabolic above grasswort construction section 105
The thinnest part of line variable cross-section section 104, grasswort construction section 105 is slightly below the thinnest part of parabola variable cross-section section 104 below, to reduce parabolic
104 most thin stress of line variable cross-section section, grasswort construction section 105 have 2 bolt through-holes 108, as shown in Figures 3 to 6.
Grasswort 8 and preceding grasswort 2 are metalwork afterwards, and structure is identical, and outside is by wide arc surface 81, the and of transition circle cambered surface 82
Plane 83 forms, and inside has circular hole 84 and square groove 85, the center line of circular hole and a centerline collineation of arc surface, square groove 85 with it is upper
Lower plane 83 is equidistant, and square groove respectively has two concentric bolt through-holes 86 about 84, and the Circularhole diameter d1 of preceding grasswort 2 is rolled up after being more than
The Circularhole diameter d2 of ear 8, as shown in Fig. 7, Fig. 8, Fig. 9, Figure 13, Figure 15.
Preceding external bushing 3 is vulcanized by inner cylinder 31 and rubber layer 32 to be formed, and inner cylinder 31 is located at the inner side of rubber layer 32, and inner cylinder 31 is relative
The cylinder body 123 of the inner side of rubber layer 32.Inner cylinder 31 is high intensity, the nonmetallic materials of antiwear heat resisting, and inside and outside is concentric column
Face, also jagged, there is the conical surface end；There are small circle ring, fillet, cylinder body, small projection, groove, annulus, the conical surface in rubber layer 32
The features such as annulus, rear external bushing 9 is identical with the preceding structure of external bushing 3, and simply internal diameter is different with external diameter, such as Figure 10, Figure 13, Tu14Suo
Show.
Preceding neck bush 4 is nonmetallic materials, and the performance such as mechanical strength, wear-resisting, lubrication is better than metal material, such as modification of nylon
PA66 etc., above there are the spies such as cylindrical anchor ring, inner conical surface, male cone (strobilus masculinus), the inner side conical surface, inner circle anchor ring, L-shaped breach, cylinder, the end conical surface
Sign.Neck bush 10 is identical with the preceding structure of neck bush 4 afterwards, and simply internal diameter is different with external diameter, as shown in Figure 11, Figure 13, Figure 14.
Front axle tube 5 is metal material, and inside and outside is the concentric face of cylinder, and there are chamfering, rear axle tube 11 and the knot of front axle tube 5 in both ends
Structure is identical, and simply internal diameter is different with external diameter, as shown in Figure 12 to Figure 14.
Upper cover plate 6 is groove profile, at center on have a via 61, at the center of lower bolster 7 on have via, via is built with lower positioning
Pin 71, upper cover plate 6 is identical with the outside width of lower bolster 7, lateral thickness=(s-b-0.8)/2, and wherein s is in U bolt 15
Side spacing, b is the width of FRP composite material plate spring bodies, as shown in Fig. 7 to Fig. 9, Figure 15, Figure 17, Figure 20.
There is via at the center of backing plate 17, via is built with upper alignment pin 171, and both ends there are four arc surfaces 172, to avoid
Interfere during installation with U bolt 15, both ends upwarp 173 and are used to prevent U bolt 15 from deviating from, as shown in Figure 18 to Figure 20.
First preceding neck bush 4 is attached in the round table surface of following pressing element, before then preceding external bushing 3 is enclosed on neck bush 4,
Before front axle tube 5 is inserted in neck bush 4, preceding grasswort 2 is put down from top to bottom, and makes the rubber layer of preceding grasswort 2 and preceding external bushing 3
Contact, another preceding external bushing 3 is enclosed on another preceding neck bush 4, it is small upside down, the center of preceding neck bush 4 and upper face pressure
The center line alignment of the pressure core of tool, and the rubber layer of external bushing 3 is bonded with the other end of preceding grasswort 2 before making, by hydraulic cylinder to
Dynamic pressure tool is moved down, gradually depresses preceding external bushing 3 above, preceding neck bush 4 and preceding grasswort 2, upper and lower two pressing elements is reached one
Set a distance, so, two preceding external bushings 3 and two preceding neck bush 4 are just pressed into preceding grasswort 2, as shown in FIG. 10 to 14.
Equally, after neck bush 10 after external bushing 9 after two and two is pressed into grasswort 8, as shown in FIG. 10 to 14.
After the grasswort construction section 105 of the rear end of FRP composite material plate springs body 1 is applied glue, grasswort 8 is square after insertion
Groove 805, then the bolt through-hole being each passed through with two bolts on the bolt through-hole 806 and grasswort construction section 105 on rear grasswort 8
108, and fixed with two nuts, equally, preceding grasswort 2 is fixed on to the front end of FRP composite material plate springs body 1, such as Fig. 7, figure
8th, shown in Fig. 9, Figure 16.
Applied glue in the inner side of upper cover plate 6, via 61 is directed at the upper counterbore 102 at erecting bed 101, and upper cover plate 6 is consolidated
It is scheduled on FRP composite material plate springs body 1, equally, is applied glue in the inner side of lower bolster 7, lower alignment pin 71 is directed at supporting table
Lower counterbore 106 at 103, lower bolster 7 is fixed on FRP composite material plate springs body 1, it is total to complete FRP composite material plate springs
Into installation, as shown in Fig. 7, Fig. 8, Fig. 9, Figure 15.
Fore-stock 13 and after-poppet 20 are housed on vehicle frame 12, the upper upper counterbore 102 of the alignment of alignment pin 171, first filled backing plate 17
Onto upper cover plate 6, then lower alignment pin 71 is inserted in the hole of the leaf spring bracket 161 on back axle 6, with two Hes of U bolt 15
FRP composite material plate spring assemblies are fixed on back axle 16 by nut, then the mistake with preceding bearing pin 14 through front axle tube 5 and fore-stock 13
Hole, FRP composite material plate spring assemblies front end is connected on fore-stock 13 with nut, equally, rear axle tube is passed through with rear pin shaft 18
11 and the via of after-poppet 20, FRP composite material plate spring assemblies rear end is connected on after-poppet 20 with nut, FRP is completed and answers
Installation of the condensation material plate spring assembly on vehicle, as shown in Figure 18 to Figure 20.
The outside width of upper cover plate 6 and lower bolster 7 differs 0.8mm, two U bolts 15 with the inner side distance s of U bolt 15
After FRP composite material plate springs assembly and back axle 16 are fixed together, the swing of the stress of back axle 16 can be effectively prevented, improves vehicle
The stability of traveling.
Operation principle
As shown in figure 5, the FRP composite material plate springs body of the present invention is equal in width parabola changeable section plate spring, leaf spring is most
Big shear stress is in leaf spring body thinnest part, and shear stress allowable [τ] very little of FRP composite material plate spring bodies, therefore must
Thinnest part thickness h 1 must be determined according to formula (1)：
Wherein, [τ] is shear stress allowable；Pmax is that FRP composite material plate springs body acts on volume in use
The maximum force at ear center；B is the width of FRP composite material plate spring bodies；λ is safety coefficient, more than 1.2.
As shown in figure 5, according to the relation of parabola variable cross-section, FRP composite material plate spring body interior thicknesses h2 is determined：
Wherein, l1 is distance of the thinnest part of parabola variable cross-section section 104 to grasswort center；L2 is parabola variable cross-section section
Distance of 104 thickness to grasswort center.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And deformation, the scope of the present invention are extremely equally limited by appended claims.
Claims (10)
1. a kind of longitudinal FRP composite material plate springs, it is characterised in that compound including FRP composite material plate spring bodies, the FRP
Material leaf spring body includes body stage casing, parabola variable cross-section section and grasswort construction section；
When the FRP composite material plate springs body extends from one end to the other end, successively including the grasswort construction section, the throwing
Thing line variable cross-section section, the body stage casing, the parabola variable cross-section section and the grasswort construction section；
Upper and lower surface in the body stage casing descends extension to form erecting bed and supporting table upwards respectively；Set on the erecting bed
Counterbore is equipped with, lower counterbore is provided with the supporting table；
Bolt through-hole is provided with each grasswort construction section；
The FRP composite material plate springs body is more than the center of the upper counterbore from the length of center to the front end of the upper counterbore
To the length of rear end.
2. longitudinal FRP composite material plate springs according to claim 1, it is characterised in that the both ends of the erecting bed and institute
The both ends of supporting table are stated by inclined-plane together with the transition bonding of the body stage casing, and junction is provided with fillet.
3. longitudinal FRP composite material plate springs according to claim 1, it is characterised in that the center of circle of the upper counterbore and institute
The center of circle for stating lower counterbore is respectively positioned on the median vertical line in the body stage casing；The diameter of the lower counterbore is more than the lower counterbore
Diameter.
4. longitudinal FRP composite material plate springs according to claim 1, it is characterised in that the parabola variable cross-section section with
The thickness that the body stage casing connects one end is h2, the thickness that one end is connected with grasswort construction section is h1；
h1Determined by formula (1),
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Wherein, [τ] is shear stress allowable；Pmax is that FRP composite material plate spring bodies are acted in grasswort in use
The maximum force of the heart；B is the width of FRP composite material plate spring bodies；λ is safety coefficient, more than 1.2；
h2Determined by formula (2),
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Wherein, l1 is distance of the parabola variable cross-section section thinnest part to grasswort center；L2 is that parabola variable cross-section section thickness is arrived
The distance at grasswort center.
5. longitudinal FRP composite material plate springs according to claim 1, it is characterised in that the grasswort construction section is pros
Body, the thickness of the grasswort construction section are more than the thickness that the parabola variable cross-section section is connected one end with the grasswort construction section.
6. a kind of longitudinal FRP composite material plate springs assembly, it is characterised in that including any one of the claims 1 to 5
Longitudinal FRP composite material plate springs, in addition to preceding grasswort, preceding external bushing, preceding neck bush, front axle tube, upper cover plate, lower bolster, after
Grasswort, rear external bushing, rear neck bush and rear axle tube；
The preceding grasswort and the rear grasswort are individually fixed in the rear and front end of the FRP composite material plate springs；
The preceding external bushing, the preceding neck bush and the front axle tube may be contained within the preceding grasswort；
External bushing, the rear neck bush and the rear axle tube may be contained within the rear grasswort after described.
7. longitudinal FRP composite material plate springs assembly according to claim 6, it is characterised in that the preceding grasswort with it is described
The structure of grasswort is identical afterwards, including arc surface, transition circle cambered surface and lower planes；The arc surface, the transition circle cambered surface
And the lower planes form circular hole and square groove；
The centerline collineation of the center line of the circular hole and the arc surface；Relative bolt is provided with the lower planes
Via；
Wherein, the Circularhole diameter of preceding grasswort is more than the Circularhole diameter of the rear grasswort.
8. longitudinal FRP composite material plate springs assembly according to claim 6, it is characterised in that the preceding external bushing includes
The inner cylinder and rubber layer sulfided, the inner cylinder are located at the inner side of the rubber layer；
The inner cylinder is the face of cylinder, be provided with the inner cylinder axially through breach；
The rubber layer includes cylinder body and the small circle ring in described cylinder body one end.
9. longitudinal FRP composite material plate springs assembly according to claim 6, it is characterised in that the upper cover plate is groove profile,
Via is provided with the upper cover plate center；Middle place is provided with via under the lower bolster, under being provided with the via
Alignment pin；
The upper cover plate is identical with the outside width of the lower bolster, lateral thickness=(s-b-0.8)/2, and wherein s is U bolt
Inner side spacing, b are the width of FRP composite material plate spring bodies.
10. longitudinal FRP composite material plate springs assembly according to claim 6, it is characterised in that also including backing plate, in institute
State and via is provided with the center of backing plate, alignment pin is provided with the via, set in the side at the both ends of the backing plate
Four arc surfaces are equipped with, the both ends of the backing plate upwarp.
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| CN201710829223.2A CN107642573A (en) | 2017-09-14 | 2017-09-14 | A kind of longitudinal FRP composite material plate springs assembly |
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| CN201710829223.2A CN107642573A (en) | 2017-09-14 | 2017-09-14 | A kind of longitudinal FRP composite material plate springs assembly |
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| CN113953760A (en) * | 2021-09-30 | 2022-01-21 | 东风汽车底盘系统有限公司 | Single leaf spring and manufacturing method thereof |
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