CN106092557B - A kind of leaf spring S deformation Bench test methods - Google Patents
A kind of leaf spring S deformation Bench test methods Download PDFInfo
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- CN106092557B CN106092557B CN201610701619.4A CN201610701619A CN106092557B CN 106092557 B CN106092557 B CN 106092557B CN 201610701619 A CN201610701619 A CN 201610701619A CN 106092557 B CN106092557 B CN 106092557B
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- 238000010998 test method Methods 0.000 title abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 170
- 241001101025 Lilaeopsis Species 0.000 claims abstract description 43
- 238000009661 fatigue test Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 239000011888 foil Substances 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 4
- 230000005483 Hooke's law Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The present invention relates to a kind of leaf spring S-shapeds to become Bench test methods, including longitrorse attribute testing and S-shaped deform fatigue test；Bench test device includes preceding support, grasswort bracket, for examination plate spring assembly, band arm of force backing plate, pin shaft, fork-shaped test force input shaft, bearing, rotary shaft, lower bolster, U-bolt, rotation bracing strut, middle support, rear support, shackle bracket；The height of the preceding support is greater than the height of the rear support.Leaf spring S deformation bench test mechanism of the invention can guarantee the safety during bench test；And different elasticity, the characteristic and fatigue test of different-stiffness can be implemented；Test accuracy is high；The high level matches with low level of preceding support and rear support keeps posture and stress and the vehicle installation for trying plate spring assembly consistent；It eliminates and generates influence of the torque generated when longitrorse or horizontal torsion to equipment for examination plate spring assembly.
Description
Technical field
The invention belongs to leaf springs to detect technical field of test equipment, particularly relate to a kind of leaf spring S deformation Bench test methods.
Background technique
Leaf spring (abbreviation leaf spring) can be longitudinal or horizontal on automobile.The latter is because longitudinal force will be transmitted, it is necessary to
Additional guiding load transfer device is set, makes that structure is complicated, quality increases, so only being applied in a small number of light, minicars.Longitudinal steel
Flat spring can transmit various power and torque, have guide function, and structure is simple, therefore be used widely on automobile.
Longitudinal leaf spring is divided into symmetrical and asymmetric formula again.In the middle part of leaf spring in the fixation on axle (bridge)
The heart (bolt is centre bolt herein) is if equal to the distance between leaf spring both ends grasswort center, for symmetrical steel plate bullet
Spring；If unequal, it is known as asymmetric formula leaf spring.Automobile is using symmetrical leaf spring in most cases.Due to vehicle
Perhaps installation site of the leaf spring on automobile is motionless changes wheelbase again or by variation wheelbase for reason in arrangement
When achieving the purpose that improve axle load distribution, or in order to reduce the longitrorse that leaf spring is generated when vehicle is in braking, using asymmetry
Formula leaf spring.Meanwhile leaf spring is there are also point of multiple-leaf spring and few leaf spring, monolithic leaf spring section there are also cross-section and variable cross-section it
Point, every section of multiple-leaf spring is substantially cross-section, and every section of few leaf spring is variable cross-section mostly.
Leaf spring in automotive suspension is directly related to automobile bearing capacity, comfort, safety and control stability
Important spare part, as the type of exploitation vehicle is more and more, the form of leaf spring is also more and more various and complicated, and automobile product is ground
The requirement of the precision of hair is higher and higher, and the requirement to the bench test of auto parts and components is also higher and higher.Therefore, it is necessary to carry out
A large amount of bench test and complete vehicle test could design the leaf spring for meeting vehicle performance and reliability requirement, meanwhile, to leaf spring
Bench test equipment and test method require also higher and higher.
Having bench test equipment that must also have correct test method just can be carried out effectively and the test of science.
It is that automobile produces that the force-bearing situation of leaf spring in the movement and motion process of simulating vehicle, which carries out bench test to leaf spring,
Effective and scientific method in product development process.Since the rotation center of vehicle bridge is overlapped with wheel center, is braking or opening
The moment loading generated when dynamic by the frictional force on tire and ground rotates vehicle bridge in vehicle bridge, and leaf spring generally passes through rear axle
On leaf spring bracket be fixed in vehicle bridge with U bolt, in braking or starting, leaf spring is deformed therewith, such as brake when, plate
The latter half of center of spring raises upward, and first half is downwardly convex, on the contrary, the latter half of center of leaf spring is downwardly convex, first half when starting
It raises upward, deformation of this leaf spring with respect to vehicle bridge rotation center is referred to as S-shaped deformation.
The S-shaped of leaf spring deforms and the difference of leaf spring longitrorse is, S-shaped deformation is the deformation of the rotation center of opposite vehicle bridge, and
Longitrorse is the deformation and movement of opposite vehicle, and longitrorse not only analyzes the deformation of the leaf spring in braking or starting, but also analyzes leaf spring
Deformation cause up and down motion of the vehicle bridge with respect to vehicle body.
The comparison that the bench test of present leaf spring bearing up-down force and up and down motion is done is abundant, or merely desires to do leaf spring with respect to vehicle
The deformation of bridge rotation center, so, the bench test of S-shaped deformation is necessary.
The bearing up-down force bench test of existing leaf spring is that the grasswort at 02 both ends of leaf spring is fixed on trolley 01 by pin shaft, so
Pressing element 03 is put on leaf spring 02 afterwards, applies test force on pressing element 03, carries out the detection and durability test of rigidity of plate spring, such as
Shown in Fig. 1.
Safety is poor during the leaf spring bench test mechanism test of the prior art；Enforceable pilot project is few, can only
Carry out stiffness excitations and simple fatigue test；Test error is also bigger；Hydraulic cylinder applies test force to the pressing element on leaf spring
While itself effect by reaction force equipment life is influenced big since the reaction force to equipment is unstable；Trolley
It does not fix, longitrorse and horizontal torsional test cannot be carried out to leaf spring.
Summary of the invention
The object of the present invention is to provide a kind of leaf spring S to deform Bench test methods, to solve the leaf spring rack of the prior art
The problem of safety of test mechanism, stability and poor reliability, and leaf spring S-shaped can be carried out and become test, accurately analyze S
The size of stress and deformation when deformation guarantees vehicle reliability in braking or starting.
The present invention is achieved by the following technical solutions：
A kind of leaf spring S deformation platform experiment method, S-shaped deformation test are to apply on test-bed to for examination plate spring assembly
Static torque makes described for test plate (panel) spring generation longitrorse；
Including longitrorse attribute testing；The longitrorse attribute testing includes in the detection and S-shaped deformation test of S-shaped deformation characteristic
Stress mornitoring；
Wherein the step of the detection test of S-shaped deformation characteristic is poly- includes：
It is fixed on described on bench test device for examination plate spring assembly, tool is installed in the immediate vicinity for test plate (panel) spring
The instrument of the function for the rotation angle that standby detection is generated by torque；
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly；
Then test force is applied by hydraulic cylinder, generating makes the torque for the deformation of test plate (panel) spring S-shaped；
The camber for trying plate spring assembly is kept in test to remain unchanged；The test force is smooth and is incrementally increased
To specified force；
Measure the rotation angle for examination plate spring assembly under the effect of different torques；And according to measurement result draw torque with
The relational graph of rotation angle is the detection of S-shaped deformation characteristic；
The step of stress mornitoring test in S-shaped deformation test is poly- to include：
It is fixed on described on bench test device for examination plate spring assembly, is strained described for being arranged in examination plate spring assembly
Piece；
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly；
Then test force is applied by hydraulic cylinder, generating makes the torque for the deformation of test plate (panel) spring S-shaped；
The camber for trying plate spring assembly is kept in test to remain unchanged；The test force is smooth and is incrementally increased
To specified force；
Pass through the strain measurement strain stress；
Stress is found out according to Hooke's law σ=E ε, wherein elastic modulus E=0.206 × 106Mpa, the strain generally measured
The unit of ε be μm/m.
The foil gauge is set near the centre bore for trying plate spring assembly or grasswort root.
Strain stress=10-6m/m。
A kind of leaf spring S deformation platform experiment method, including S-shaped deform fatigue test；
The step of S-shaped deformation fatigue test includes：
Test is chosen with for trying plate spring assembly；
It is fixed on described on bench test device for examination plate spring assembly, and described for being provided in examination plate spring assembly
The power of writing function and the dynamic measuring instrument device of angle；
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly；
The camber for trying plate spring assembly is kept in test to remain unchanged；The hydraulic test power it is smooth and gradually
Increase to specified force；
Then by hydraulic cylinder to the specified force for applying positive negative direction repeatedly for test plate (panel) spring, generation makes described for test plate (panel)
The torque of spring assembly S-shaped deformation；The frequency of the specified force is 0.1-3Hz；
So that described change between ± the torque repeatedly for examination plate spring assembly, until described lose for examination plate spring assembly
Effect, the number for recording the specified force is fatigue life.
Described for test plate (panel) spring assembly failure cracking, fracture no matter occurs for examination plate spring assembly or is occurred obvious when described
It is described for examination plate spring assembly stiffness variation when, it is as described for test plate (panel) spring assembly failure.
When test number of repetition is more than 0.3 × 106When fatigue life has not been reached yet, terminate to test and record stopping test
Situation of the Shi Suoshu for examination plate spring assembly.
The bench test device, including preceding support, grasswort bracket, for examination plate spring assembly, band arm of force backing plate, pin shaft, fork
Shape test force input shaft, bearing, rotary shaft, lower bolster, U-bolt, rotation bracing strut, middle support, rear support, shackle bracket；
The height of the preceding support is greater than the height of the rear support；
The grasswort bracket is fixed on the preceding support；The front end for trying plate spring assembly and the grasswort bracket connect
It connects；
It is described to be set to the upper surface for trying plate spring assembly with arm of force backing plate；The lower bolster is set to described for examination
The lower surface of plate spring assembly；The band arm of force backing plate, it is described for examination plate spring assembly and the lower bolster by the U-bolt consolidate
Fixed connection；
The fork-shaped test force input shaft is connect by the pin shaft with the band arm of force backing plate；
The lower end of the rotation bracing strut is fixedly connected with the middle support；The upper end of the rotation bracing strut passes through described
Rotary shaft and bearing are connect with the band arm of force backing plate；
The rear support is fixedly connected with the shackle bracket；The rear end for trying plate spring assembly and the shackle bracket
Connection.
The beneficial effects of the invention are as follows：
Leaf spring S deformation bench test mechanism of the invention can guarantee the safety during bench test；And it can be with
Implement different elasticity, the characteristic and fatigue test of different-stiffness；Test accuracy is high；The high level matches with low level of preceding support and rear support makes to supply
Posture and the stress for trying plate spring assembly are consistent with vehicle installation；Eliminate shadow of the horizontal rectilinear motion to bench test of hydraulic cylinder
It rings, not will cause bench test distortion；It eliminates and generates the torque generated when longitrorse or horizontal torsion to the shadow of equipment for examination plate spring assembly
It rings, the stand arrangement service life is long, reduces the maintenance and more preferable, save the cost of equipment.
Detailed description of the invention
Fig. 1 is the bearing up-down force bench test device structural schematic diagram of existing leaf spring；
Fig. 2 is bench test device structural schematic diagram of the present invention；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the A-A cross-sectional view of Fig. 3；
Fig. 5 is the B-B cross-sectional view of Fig. 4；
Fig. 6 is the C-C cross-sectional view of Fig. 4；
Fig. 7 is the D-D cross-sectional view of Fig. 4.
Description of symbols
01 trolley, 02 leaf spring, 03 pressing element, support before 1, lower plate before 101,102 preceding ground mounting holes vertically prop up before 103
Fagging, 104 front end panels, 105 first type connected in stars, 2 grasswort brackets, 21 grasswort rack mounting apertures, 22 grasswort support plates, 23
Grasswort mounting hole, 3 for trying plate spring assembly, 31 centre bolts, 32 lifting lugs, 321 shackle plates, 322 two shackle shafts, 4 band arm of force pads
Plate, 41U type bolt through-hole, 42 risers, 43 pin shaft via holes, 44 bearing mounting holes, 5 pin shafts, 6 fork-shaped test force input shafts, 61 pins
Axis hole, 62 flanges, 7 bearings, 8 rotary shafts, 9 lower bolsters, 10U type bolt, 11 rotation bracing struts, 111 via holes, 112 fixed plates, 12
Middle support, lower plate in 121, ground mounting hole in 122,123 slot rails, 124 threaded holes, 13 rear supports are gone to the bottom after 131
Plate, ground mounting hole after 132, vertical support plate after 133,134 rear bearing sheets, 135 second type connected in stars, 14 shackle brackets,
141 shackle bracket mounting holes, 142 lifting lug support plates, 143 lifting lug mounting holes.
Specific embodiment
Carry out the technical solution that the present invention will be described in detail by the following examples, embodiment below is merely exemplary, only
It can be used to explanation and illustration technical solution of the present invention, and be not to be construed as the limitation to technical solution of the present invention.
The present invention provides a kind of leaf spring S-shaped change bench test mechanism, as shown in Figures 2 to 7, including preceding support 1, grasswort branch
Frame 2, for examination plate spring assembly 3, band arm of force backing plate 4, pin shaft 5, fork-shaped test force input shaft 6, bearing 7, rotary shaft 8, lower bolster 9, U
Type bolt 10, rotation bracing strut 11, middle support 12, rear support 13, shackle bracket 14.
The height of preceding support 1 is greater than the height of rear support 13.
Before grasswort bracket 2 is fixed on support 1；Front end for trying plate spring assembly 3 is connect with grasswort bracket 2.
Preceding support 1 includes 101, two preceding vertical support plates 103 of preceding lower plate and front end panel 104；It is vertically propped up before two
Before fagging 103 is arranged in parallel between lower plate 101 and front end panel 104；Preceding vertical support plate plays support and improves equipment
The effect of height.
In the upper surface of front end panel 104, there are two the first longitudinally through type connected in stars 105 for setting；In the application
In, it is longitudinally through to refer to from preceding support to rear support direction to be longitudinal.
Multiple preceding ground mounting holes 102 are provided on preceding lower plate 101, for solid by bolt with ground or base station
Fixed connection.
Grasswort bracket 2 includes grasswort bracket bottom plate, two grasswort support plates 22；Two grasswort support plates 22 be parallel to each other and
It is perpendicularly fixed on grasswort bracket bottom plate.
At least two grasswort rack mounting apertures 21, and the two grasswort rack mounting apertures are provided on grasswort bracket bottom plate
21 are arranged in a one-to-one correspondence with two the first type connected in stars 105；Bolt head is placed in the first type connected in star, shank of bolt is worn
It is secured with nuts after pulleying ear supporter mounting hole.
A grasswort mounting hole 23 is respectively relatively set in two grasswort support plates 22；For examination 3 front end of plate spring assembly
Grasswort is set between two grasswort support plates, is connect grasswort with grasswort bracket by bolt.
Be example for examination plate spring assembly 3, represent all kinds of various forms of longitudinal leaf springs, both ends are with volume
Ear, grasswort are provided with bushing, can be a piece of for examination plate spring assembly, can also be superimposed by two panels, three pieces or multi-disc, so
It is fixed together afterwards with centre bolt 31, anti-friction pad is housed between piece and piece, reduce interleaf friction, reduce leaf spring dynamic rate,
In order to prevent between piece and piece, clip is housed, these are all the general features of plate spring assembly, in addition, leaf spring rear end one on leaf spring
As by lifting lug 32 on the vehicle, the lifting lug 32 of the present patent application is example, and lifting lug 32 is by shackle plate 321, shackle shaft 322
Composition, there are a via hole and a shackle shaft riveting hole in 321 both ends of shackle plate, shackle shaft riveting are formed behind riveting hole and is hung
Ear.
The upper surface for trying plate spring assembly 3 is set to arm of force backing plate 4；Lower bolster 9 is set under examination plate spring assembly 3
Surface；Band arm of force backing plate 4 is fixedly connected for examination plate spring assembly 3 and lower bolster 9 by U-bolt 10.
Band arm of force backing plate 4 is T font, including transverse slat and riser 42；The lower end of riser and the upper surface of transverse slat are fixed as one
Body structure.
There are four U-bolt via holes 41 for setting on transverse slat, for across two U-bolts 10.It is provided on transverse slat
Avoid the circular hole with the centre bolt interference for trying plate spring assembly.
The middle part of riser 42 is provided with bearing mounting hole 44,44 one end of bearing mounting hole has the shoulder other end to have clip
Slot；Bearing 7 is pressed into bearing mounting hole 44, and circlip is fixed.The upper end of riser 42 is provided with pin shaft via hole 43；Fork-shaped
Test force input shaft 6 is connect by pin shaft 5 with arm of force backing plate 4.In this application, pin shaft 5 is cylinder, and one end of pin shaft has
Greater than the cylindrical body of pin shaft mid diameter, for limiting, the other end of pin shaft has the groove less than pin shaft mid diameter, for filling
Circlip.There are pin shaft hole 61 and flange 62 on fork-shaped test force input shaft 6.
Rotary shaft 8 is cylinder, and one end of rotary shaft 8 is the cylindrical body greater than mid diameter, for limiting；Rotary shaft
The other end has the groove less than mid diameter, is used for assembling jump ring.
Lower bolster 9 is rectangle, and there is shoulder at both ends, to avoid interfering with for the centre bolt in examination plate spring assembly 3, under
Circular hole is provided in the middle part of backing plate.
The lower end of rotation bracing strut 11 is fixedly connected with middle support 12；Rotate the upper end of bracing strut 11 by rotary shaft 8 and
Bearing 7 is connect with arm of force backing plate 4.
Rotation bracing strut 11 is Y shape, including fixed plate 112 and two rotary shaft support arms；Two rotary shaft support arms
Lower end is fixedly connected with the upper end of fixed plate；Concentric via hole 111 is provided on two rotary shaft support arms.
Middle support 12 includes middle lower plate 121 and the slot rails 123 for being perpendicularly fixed at middle lower plate upper surface；In groove profile
It is provided with threaded hole 124 on one side wall of guide rail 123, for fastening the fixed plate of rotation bracing strut；On middle lower plate 121
It is provided with middle ground mounting hole 122, for being bolted to connection with ground or base station.
Rear support 13 is fixedly connected with shackle bracket 14；Rear end for trying plate spring assembly 3 is connect with shackle bracket.
Rear support 13 includes vertical support plate 133 and rear bearing sheet 134 after rear lower plate 131, two；It is vertically propped up after two
Fagging 133 is arranged in parallel between rear lower plate 131 and rear bearing sheet 133.Vertical support plate plays support and raising afterwards
The effect of device height.
Lower ground mounting hole 132 after being provided on rear lower plate 131；In the upper surface of rear bearing sheet, there are two phases for setting
Mutually the second parallel and longitudinally through convex groove 135.
Shackle bracket 14 includes shackle bracket bottom plate and two lifting lug support plates 142；Two lifting lug support plates 142 are mutually flat
Row and the upper surface for being perpendicularly fixed at shackle bracket bottom plate.
At least two shackle bracket mounting holes 141 are provided on shackle bracket bottom plate；Two shackle bracket mounting holes 141
It is arranged in a one-to-one correspondence with two the second convex grooves 135.
Concentric lifting lug mounting hole 143 is provided on two shackle brackets.
It will be aligned with the circular hole of arm of force backing plate for the centre bolt in examination plate spring assembly, and by the transverse slat pressure with arm of force backing plate
For the upper surface of examination plate spring assembly, equally lower bolster is pressed in for trying below plate spring assembly, then with two U bolts under
Up pass through with the U-bolt via hole on arm of force backing plate, tightened with nut, will with arm of force backing plate, lower bolster, for try plate spring assembly
It is fixed together.
On the jack horse test bed metal Horizon being typically mounted at mounting groove, first with bolt pass through preceding ground mounting hole will before
Support is fixed on metal Horizon, then by four bolt heads fill in front of support two the first type connected in stars in, each first
Two bolts of type connected in star internal plug are tightened with nut after allowing bolt to pass through grasswort rack mounting apertures, grasswort bracket are fixed on
In the upper plane of preceding support；Equally, it first passes through rear ground mounting hole with bolt rear support is fixed on metal Horizon, then by four
A bolt head is filled in two the second type connected in stars of rear support, each second type connected in star internal plug, two bolts, allows spiral shell
Bolt is tightened after passing through shackle bracket mounting hole with nut, and shackle bracket is fixed in the upper plane of rear support；Equally, spiral shell is first used
Bolt passes through middle ground mounting hole and middle support is fixed on metal Horizon.
The grasswort mounting hole on grasswort bracket and the grasswort centre bore for trying plate spring assembly are passed through with bolt, it will be for test plate (panel) spring
Assembly front end is fixed on grasswort bracket.
Shackle shaft on one lifting lug is passed through into the lifting lug mounting hole on shackle bracket, the shackle shaft on a lifting lug is worn
The rear grasswort centre bore for trying plate spring assembly is crossed, allows the shackle shaft on two lifting lugs to be each passed through the via hole of other side, tightens respectively
Nut is fixed.
Rotary shaft is each passed through to the via hole of rotation bracing strut and the inner hole of bearing, with the groove of circlip card on the rotary shaft
It is interior.
Apply pressing force on band arm of force backing plate, make the camber for reaching test requirements document for the camber for trying plate spring assembly,
And the threaded hole that in the guide rail of support in the lower end insertion for rotating bracing strut, two bolts will be screwed on rear side of the guide rail of middle support
It is interior, the lower end for rotating bracing strut is clamped and fixed.
Pin shaft is each passed through the pin shaft hole of fork-shaped test force input shaft and with the pin shaft via hole on arm of force backing plate, uses circlip
It is stuck in the groove on pin shaft, then the flange on fork-shaped test force input shaft is connected with hydraulic cylinder, complete of the invention
Installation.
The center line of rotary shaft is H (shown in Fig. 3) to the distance for trying plate spring assembly, and distance H is actually vehicle bridge rotation
Turn center and acts on band when hydraulic cylinder is by fork-shaped test force input shaft input level test force in X direction to the distance of leaf spring
Torque is generated on the arm bar of arm of force backing plate, makes to generate S-shaped deformation around rotary shaft for examination plate spring assembly, in this way, just imitating plate
For spring when vehicle is braked or is started, the torque for acting on vehicle bridge rotation center that the frictional force on tire and ground generates makes leaf spring
The deformation of generation.
If fork-shaped test force input shaft is directly anchored on the arm bar with arm of force backing plate, the horizontal linear of hydraulic cylinder
Movement also hampers deformation and movement after leaf spring is acted on by moment, is distorted bench test, meanwhile, what the inclination of leaf spring generated
The work and service life of torque influence hydraulic cylinder.Fork-shaped test force input shaft is connected to the arm of force with arm of force backing plate by pin shaft
On bar, influence of the horizontal rectilinear motion of hydraulic cylinder to bench test is just eliminated, not will cause bench test distortion, and will not
Equipment is influenced, while having fully ensured that bench test is reliable and stable.
During the test, it needs to set experimental enviroment, in this application, the experimental enviroment of selection is temperature 20 ± 15
DEG C, humidity 65 ± 20%.In the other embodiments of the application, experimental enviroment also can according to need and be adjusted.
A kind of leaf spring S deformation platform experiment method, S-shaped deformation test are to apply on test-bed to for examination plate spring assembly
Static torque makes described for test plate (panel) spring generation longitrorse.
Including longitrorse attribute testing；The longitrorse attribute testing includes in the detection and S-shaped deformation test of S-shaped deformation characteristic
Stress mornitoring.
Wherein the step of the detection test of S-shaped deformation characteristic is poly- includes：
It is fixed on described on bench test device for examination plate spring assembly, tool is installed in the immediate vicinity for test plate (panel) spring
The instrument of the function for the rotation angle that standby detection is generated by torque.The center for test plate (panel) spring refers to the rotation of bench test device herein
Near spindle central or the centre bolt for trying plate spring assembly.In the present embodiment, it is rotary shaft with bench test device
It is illustrated for center, because rotating shaft center is equivalent to the center line of vehicle bridge in use.
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly；It keeps for test plate (panel) spring
Both ends it is identical as the use condition of the leaf spring of common same model and same condition.
Then test force is applied by hydraulic cylinder, generating makes the torque for the deformation of test plate (panel) spring S-shaped.
The camber for trying plate spring assembly is kept in test to remain unchanged；The test force is smooth and is incrementally increased
To specified force.
Measure the rotation angle for examination plate spring assembly under the effect of different torques；And according to measurement result draw torque with
The relational graph of rotation angle is the detection of S-shaped deformation characteristic.
The maximum rotation angle of rotary shaft when measuring maximum moment simultaneously.
The step of stress mornitoring test in S-shaped deformation test is poly- to include：
It is fixed on described on bench test device for examination plate spring assembly, is strained described for being arranged in examination plate spring assembly
Piece；Because the central part for examination plate spring assembly S-shaped distortional stress usually in the stretching side surface of leaf spring is bigger, inspection
Survey carries out as far as possible near centre bore, such as pastes foil gauge near U bolt clamping.
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly.
Then test force is applied by hydraulic cylinder, generating makes the torque for the deformation of test plate (panel) spring S-shaped；
The camber for trying plate spring assembly is kept in test to remain unchanged；The test force is smooth and is incrementally increased
To specified force.
Pass through the strain measurement strain stress.
Stress is found out according to Hooke's law σ=E ε, wherein elastic modulus E=0.206 × 106Mpa, the strain generally measured
The unit of ε be μm/m；In this application, strain stress=10-6m/m。
The foil gauge is set near the centre bore for trying plate spring assembly or grasswort root.
A kind of leaf spring S deformation platform experiment method, including S-shaped deform fatigue test；
The step of S-shaped deformation fatigue test includes：
Test is chosen with for trying plate spring assembly；Under no particular case, the arbitrary extracting from same series-produced leaf spring
Three leaf springs are used as trying plate spring assembly, and are tested according to same experimental condition.
It is fixed on described on bench test device for examination plate spring assembly, and described for being provided in examination plate spring assembly
The power of writing function and the dynamic measuring instrument device of angle；
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly；
The camber for trying plate spring assembly is kept in test to remain unchanged；The hydraulic test power it is smooth and gradually
Increase to specified force；
Then by hydraulic cylinder to the specified force for applying positive negative direction repeatedly for test plate (panel) spring, generation makes described for test plate (panel)
The torque of spring assembly S-shaped deformation；The frequency of the specified force is 0.1-3Hz；In this application, specified force can be big before this headed by
The power of torque is also possible to other specified power, and under the specified force, the moment of torsion generated for examination plate spring assembly is same.
So that described change between ± the torque repeatedly for examination plate spring assembly, until described lose for examination plate spring assembly
Effect, the number for recording the specified force is fatigue life.
During the test, the specified force condition for testing up and down direction cannot change, that is, keep the arc for trying plate spring assembly
It is high constant；It and during testing, cannot stop halfway, if midway of having to stops, needing to record dwell time and reason.
Described for test plate (panel) spring assembly failure cracking, fracture no matter occurs for examination plate spring assembly or is occurred obvious when described
It is described for examination plate spring assembly stiffness variation when, it is as described for test plate (panel) spring assembly failure.
When test number of repetition is more than 0.3 × 106When fatigue life has not been reached yet, terminate to test and record stopping test
Situation of the Shi Suoshu for examination plate spring assembly.
In addition, when replacement cracking and the leaf spring of fracture are further continued for being tested, and it is abnormal that significantly fever, abnormal sound etc. occurs
Situation, there is a situation where returned record with report form.
The above is only the descriptions of the preferred embodiment of the present invention, it is noted that due to the finiteness of literal expression, and
Objectively there is unlimited specific structure, for those skilled in the art, is not departing from the principle of the invention
Under the premise of, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (6)
1. a kind of leaf spring S deforms platform experiment method, it is characterised in that：S-shaped deformation test is on test-bed to for test plate (panel)
Spring assembly application static torque makes described for test plate (panel) spring generation longitrorse；
Including longitrorse attribute testing；The longitrorse attribute testing includes answering in the detection and S-shaped deformation test of S-shaped deformation characteristic
Power detection；
Wherein the step of the detection test of S-shaped deformation characteristic is poly- includes：
It is fixed on described on bench test device for examination plate spring assembly, has inspection in the immediate vicinity installation for test plate (panel) spring
Survey the instrument of the function of the rotation angle generated by torque；
The bench test device, including preceding support, grasswort bracket, for examination plate spring assembly, band arm of force backing plate, pin shaft, fork-shaped try
Test power input shaft, bearing, rotary shaft, lower bolster, U-bolt, rotation bracing strut, middle support, rear support, shackle bracket；
The height of the preceding support is greater than the height of the rear support；
The grasswort bracket is fixed on the preceding support；The front end for trying plate spring assembly is connect with the grasswort bracket；
It is described to be set to the upper surface for trying plate spring assembly with arm of force backing plate；The lower bolster is set to described for test plate (panel) spring
The lower surface of assembly；The band arm of force backing plate, described fixed for examination plate spring assembly and the lower bolster by the U-bolt connect
It connects；
The fork-shaped test force input shaft is connect by the pin shaft with the band arm of force backing plate；
The lower end of the rotation bracing strut is fixedly connected with the middle support；The upper end of the rotation bracing strut passes through the rotation
Axis and bearing are connect with the band arm of force backing plate；
The rear support is fixedly connected with the shackle bracket；The rear end for trying plate spring assembly and the shackle bracket connect
It connects；
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly；
Then test force is applied by hydraulic cylinder, generating makes the torque for the deformation of test plate (panel) spring S-shaped；
The camber for trying plate spring assembly is kept in test to remain unchanged；The test force is smooth and is gradually increased to refer to
Determine power；
Measure the rotation angle for examination plate spring assembly under the effect of different torques；And torque and rotation are drawn according to measurement result
The relational graph at angle is the detection of S-shaped deformation characteristic；
The step of stress mornitoring test in S-shaped deformation test is poly- to include：
It is fixed on described on bench test device for examination plate spring assembly, described for foil gauge is arranged in examination plate spring assembly；
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly；
Then test force is applied by hydraulic cylinder, generating makes the torque for the deformation of test plate (panel) spring S-shaped；
The camber for trying plate spring assembly is kept in test to remain unchanged；The test force is smooth and is gradually increased to refer to
Determine power；
Pass through the strain measurement strain stress；
Stress is found out according to Hooke's law σ=E ε, wherein elastic modulus E=0.206 × 106The unit of Mpa, the strain stress measured is
μm/m。
2. leaf spring S according to claim 1 deforms platform experiment method, it is characterised in that：The foil gauge is set to institute
State for try plate spring assembly centre bore near or grasswort root.
3. leaf spring S according to claim 1 deforms platform experiment method, it is characterised in that：Strain stress=10-6m/m。
4. a kind of leaf spring S deforms platform experiment method, it is characterised in that：Fatigue test is deformed including S-shaped；
The step of S-shaped deformation fatigue test includes：
Test is chosen with for trying plate spring assembly；
It is fixed on described on bench test device for examination plate spring assembly, and described for being provided with record in examination plate spring assembly
The power of function and the dynamic measuring instrument device of angle；
The bench test device, including preceding support, grasswort bracket, for examination plate spring assembly, band arm of force backing plate, pin shaft, fork-shaped try
Test power input shaft, bearing, rotary shaft, lower bolster, U-bolt, rotation bracing strut, middle support, rear support, shackle bracket；
The height of the preceding support is greater than the height of the rear support；
The grasswort bracket is fixed on the preceding support；The front end for trying plate spring assembly is connect with the grasswort bracket；
It is described to be set to the upper surface for trying plate spring assembly with arm of force backing plate；The lower bolster is set to described for test plate (panel) spring
The lower surface of assembly；The band arm of force backing plate, described fixed for examination plate spring assembly and the lower bolster by the U-bolt connect
It connects；
The fork-shaped test force input shaft is connect by the pin shaft with the band arm of force backing plate；
The lower end of the rotation bracing strut is fixedly connected with the middle support；The upper end of the rotation bracing strut passes through the rotation
Axis and bearing are connect with the band arm of force backing plate；
The rear support is fixedly connected with the shackle bracket；The rear end for trying plate spring assembly and the shackle bracket connect
It connects；
By the specified camber and fixation rotation bracing strut for being pressed onto test requirements document for examination plate spring assembly；
The camber for trying plate spring assembly is kept in test to remain unchanged；Hydraulic test power is smooth and is gradually increased to refer to
Determine power；
Then by hydraulic cylinder to the specified force for applying positive negative direction repeatedly for test plate (panel) spring, generation makes described total for test plate (panel) spring
The torque deformed at S-shaped；The frequency of the specified force is 0.1-3Hz；
So that described change between ± the torque repeatedly for examination plate spring assembly, until described for test plate (panel) spring assembly failure, note
The number for recording the specified force is fatigue life.
5. leaf spring S according to claim 4 deforms platform experiment method, it is characterised in that：It is described to be lost for examination plate spring assembly
Effect cracking, fracture no matter occurs for examination plate spring assembly or is occurred apparent described for trying plate spring assembly stiffness variation when described
When, it is as described for test plate (panel) spring assembly failure.
6. leaf spring S according to claim 4 deforms platform experiment method, it is characterised in that：When test number of repetition is more than
0.3×106When fatigue life has not been reached yet, terminate to test and record the situation for trying plate spring assembly when stopping test.
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| CN201610701619.4A CN106092557B (en) | 2016-08-22 | 2016-08-22 | A kind of leaf spring S deformation Bench test methods |
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| CN201610701619.4A CN106092557B (en) | 2016-08-22 | 2016-08-22 | A kind of leaf spring S deformation Bench test methods |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478445A (en) * | 2017-07-25 | 2017-12-15 | 中国第汽车股份有限公司 | The bench test device and test method of the auxiliary spring compound suspension frame system of commercial car rubber |
| CN107764532A (en) * | 2017-10-09 | 2018-03-06 | 南京工程学院 | A kind of automobile-used leaf spring test device of light duty |
| CN109163867B (en) * | 2018-06-29 | 2023-08-04 | 湖北省地震局 | Device and method for detecting elastic characteristics of leaf spring under large-deflection deformation condition |
| CN108775976B (en) * | 2018-09-11 | 2023-11-14 | 江苏擎弓科技股份有限公司 | Bending stress detection device for composite material automobile leaf spring product inspection |
| CN109238680B (en) * | 2018-10-15 | 2020-09-22 | 项孝泓 | Detection apparatus for car leaf spring |
| CN109632240B (en) * | 2018-12-11 | 2021-02-05 | 中国航天空气动力技术研究院 | Control surface force measuring balance in unfolding process of folding rudder |
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| CN201181270Y (en) * | 2007-12-14 | 2009-01-14 | 安徽昊方机电股份有限公司 | Rigid spring leaf fatigue testing bench of automobile air conditioner electromagnetic clutch |
| CN204183458U (en) * | 2014-10-29 | 2015-03-04 | 东风汽车悬架弹簧有限公司 | A kind of leaf spring simulated road test fixture |
| CN104865053A (en) * | 2014-03-31 | 2015-08-26 | 北汽福田汽车股份有限公司 | Automobile plate spring testing device and testing method thereof |
| CN104949830A (en) * | 2015-07-06 | 2015-09-30 | 湖南湖大艾盛汽车技术开发有限公司 | Test bed for leaf spring for automobile suspension |
| CN105466703A (en) * | 2015-11-30 | 2016-04-06 | 重庆红岩方大汽车悬架有限公司 | Leaf spring assembly fatigue test bench |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU410276A1 (en) * | 1971-04-13 | 1974-01-05 | ||
| CN201181270Y (en) * | 2007-12-14 | 2009-01-14 | 安徽昊方机电股份有限公司 | Rigid spring leaf fatigue testing bench of automobile air conditioner electromagnetic clutch |
| CN104865053A (en) * | 2014-03-31 | 2015-08-26 | 北汽福田汽车股份有限公司 | Automobile plate spring testing device and testing method thereof |
| CN204183458U (en) * | 2014-10-29 | 2015-03-04 | 东风汽车悬架弹簧有限公司 | A kind of leaf spring simulated road test fixture |
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| CN105466703A (en) * | 2015-11-30 | 2016-04-06 | 重庆红岩方大汽车悬架有限公司 | Leaf spring assembly fatigue test bench |
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