CN107764570A - A kind of multi-functional a quarter vehicle suspension characteristic test experimental bench - Google Patents
A kind of multi-functional a quarter vehicle suspension characteristic test experimental bench Download PDFInfo
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- CN107764570A CN107764570A CN201711204239.0A CN201711204239A CN107764570A CN 107764570 A CN107764570 A CN 107764570A CN 201711204239 A CN201711204239 A CN 201711204239A CN 107764570 A CN107764570 A CN 107764570A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
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Abstract
The present invention relates to a kind of suspension performance test experimental bed, more particularly to a kind of multi-functional a quarter vehicle suspension characteristic test experimental bench that can be used for air spring characteristic test and air suspension vibration Characteristics, the testing stand includes two degrees of freedom suspension performance test pattern, single-degree-of-freedom suspension performance test pattern and spring performance test pattern, including gantry frame, mechanical platform, combined type spring damping and vibration isolating device, nonspring carried mass pedestal, spring bottom supporting plate, sprung parts, spring top supporting plate, lead, spring carried mass guiding linear bearing, load case, guide beam, guide bearing installing plate, nonspring carried mass load plate installation bolt, servo actuator and shock absorber connecting plate.The present invention is simple in construction, and safe to use, manufacture difficulty is low with cost, farthest simulates the suspension damping behavior of two degrees of freedom 1/4, and experimental result is accurate.
Description
Technical field
The present invention relates to a kind of suspension performance test experimental bed, more particularly to it is a kind of can be used for air spring characteristic test and
The multi-functional a quarter vehicle suspension characteristic test experimental bench of air suspension vibration Characteristics.
Background technology
Comfortableness is one of important performance of vehicle, and comfortableness is relevant with the natural vibration characteristic of vehicle, and vehicle body
Intrinsic vibration it is related to the characteristic of suspension system.The main function of suspension is to transmit all acted between wheel and vehicle body
Power and torque, and relax and the shock loading of vehicle body, the thus caused vibration that decays are transmitted to by uneven road surface, ensure relaxing for occupant
Adaptive, reduce the dynamic loading of lorry and vehicle body.Suspension flexibly connects vehicle frame with wheel, and being related to a variety of of automobile makes
It is one of most important three big assembly of vehicle with performance.Suspension system is both the important guarantee of vehicle riding comfort, is car again
The important leverage of driving safety, thus research and development can carry out suspension system characteristic research test experimental bed have it is very heavy
The meaning wanted.
But existing a quarter vehicle suspension test experimental bed has the disadvantage that and deficiency：(1) existing test-bed
Tested mostly for dilly suspension system, it is more rare currently for the suspension test system of large-scale agricultural equipment；
(2) existing experimental stand is complicated, and manufacture difficulty and cost are higher；(3) existing experimental stand can only be carried out single mostly
Two-freedom suspension performance is tested or single-degree-of-freedom experiment, experimental cost more waste.
The content of the invention
Model machine cost be present when carrying out real vehicle suspension system experimental study for some large-scale, intelligent, high-end agricultural vehicles
The problems such as high, suspension performance parameter is difficult to obtain, experimental study difficulty, it is an object of the invention to provide a kind of multi-functional four points
One of vehicle suspension characteristic test experimental bench, by being reasonably laid out and designing, farthest simulated suspension actual condition, is obtained
The response characteristic that must be suspended under different operating modes, and suspension parameter is optimized and improved based on response characteristic.
To achieve these goals, the invention provides following technical scheme：
The present invention provides a kind of multi-functional a quarter vehicle suspension characteristic test experimental bench, and the experimental bench includes gantry frame
Frame, mechanical platform 2, combined type spring damping and vibration isolating device 3, nonspring carried mass pedestal 4, spring bottom supporting plate 5, sprung parts 6,
Spring top supporting plate 7, lead 8, spring carried mass are oriented to is pacified with linear bearing 9, loading case 10, guide beam 15, guide bearing
Loading board 16, nonspring carried mass load plate installation bolt 18, servo actuator 21 and shock absorber connecting plate 24；
The gantry frame includes being arranged horizontally in the vibration sewing platform base 22 on ground and is vertically fixed in shake table a pair
The longeron 1 of the upper surface left and right ends of pedestal 22；
The cylinder body of the servo actuator 21 is vertically fixed in the vibration upper surface middle part of sewing platform base 22, servo actuator 21
Piston rod extends upward；
The upper end of the mechanical platform 2 and the piston rod of servo actuator 21 is affixed；
The top of the combined type spring shock absorption damping shock absorber 3 and shock absorber connecting plate 24 are affixed, and bottom is put down with machinery
Platform 2 is affixed；
Linear bearing installing plate 19 is fixedly connected with the mechanical platform 2；
The shock absorber connecting plate 24 is connected by nonspring carried mass pedestal 4 with spring bottom supporting plate 5；
The nonspring carried mass load plate installation bolt 18 includes threaded portion and smooth cylindrical portion；
The threaded portion of two symmetrically arranged nonspring carried mass load plate installation bolts 18 vertically with shock absorber connecting plate 24
Affixed with spring bottom supporting plate 5, the nonspring carried mass that the insertion of smooth cylindrical portion is arranged on linear bearing installing plate 19 is oriented to
With in linear bearing 20；
The bottom of the sprung parts 6 and spring bottom supporting plate 5 are affixed, and top and spring top supporting plate 7 are affixed；
The spring top supporting plate 7 is triangular structure, three corners of its upper surface and with three corners
The lower surface of corresponding loading case 10, is provided with lead mounting seat 17；
It is affixed with guide bearing installing plate 16 in the middle part of the lower surface of guide beam 15；
The shape of the guide bearing installing plate 16 is identical with the shape of spring top supporting plate 7, guide bearing installing plate
16 three corners correspond to lead mounting seat 17 and are provided with lead jack 161, are provided with and lead around lead jack 161
To bearing mounting hole 163, spring carried mass guiding linear bearing 9 is fixed in by bolt through the guide bearing mounting hole 163
The upper surface of guide bearing installing plate 16；
Lead 8 is oriented to through lead jack 161 and spring carried mass and uses linear bearing 9, is supported respectively with spring top
The lead mounting seat 17 of the upper surface of plate 7 and loading case 10 lower surface is affixed.
The sprung parts 6 are air spring, helical spring, hydro-pneumatic spring or shock absorber.
Guide beam 15 includes guide beam installing plate 151, guide beam main body 152 and guide beam location-plate 154；Two guide beams
Installing plate 151 is separately positioned on the left and right ends of guide beam main body 152, affixed by bolt and longeron 1；Guide beam location-plate
154 are arranged in the middle part of the lower surface of guide beam main body 152, affixed by bolt and guide bearing installing plate 16.
Guide beam reinforcing plate 153 is provided between guide beam installing plate 151 and guide beam main body 152.
The spring charge material of multigroup arranged stacked is connected with the loading case 10 by spring carried mass load plate installation bolt 14
Measure load plate 11.
Pass through padded block gap between every group of mounted mass load plate 11.
The power of the servo actuator 21 comes from hydraulic system, electromagnetic system or mechanical system.
Compared with prior art, the beneficial effects of the present invention are：
1st, come equivalent tire stiffness and damping from combined type spring shock absorption damping shock absorber, not only simplify experimental stand
Structure, reduce manufacture difficulty and cost, but also can the at utmost suspension damping behavior of simulation two degrees of freedom 1/4；
2nd, the gantry type frame structure that stand main body frame is formed using two longerons, a crossbeam and vibration sewing platform base,
Its advantage is that Stability Analysis of Structures, bearing capacity are strong；
3rd, guider is carried by spring carried mass and non-spring so that when suspension stand is encouraged by actuator, only in Vertical Square
Motion upwards, roll and vibration sewing platform base is transmitted to by stand main body frame with the motion in pitching, ensure that suspension performance is tested
When security and experimental result accuracy；
4th, experimental bench of the invention belongs to multi-functional suspension vibration experiment table, is reserved on the main building block of experimental stand
There is the installation site for different type experiment, installed by the selection to main building block, it is outstanding that two degrees of freedom 1/4 can be carried out
The multinomial experiments such as frame characteristic test, the experiment of the suspension performance of single-degree-of-freedom 1/4 and spring performance experiment, save experimental cost.
Brief description of the drawings
Fig. 1 is the structural representation of the multi-functional a quarter vehicle suspension characteristic test experimental bench of the present invention；
Fig. 2 is the structural representation of nonspring carried mass load plate installation bolt 18；
Fig. 3 is the structural representation of guide beam 15；
Fig. 4 is the structural representation of guide bearing installing plate 16；
Fig. 5 is the structure chart of single-degree-of-freedom suspension performance test pattern of the present invention；
Fig. 6 is the structure chart of spring performance test pattern of the present invention.
Reference therein is：
The mechanical platform of 1 longeron 2
The nonspring carried mass pedestal of 3 combined type spring damping and vibration isolating device 4
The sprung parts of 5 spring bottom supporting plate 6
The lead of 7 spring top supporting plate 8
9 spring carried mass are oriented to loads case with linear bearing 10
11 spring carried mass load plates 12 increase longeron
The spring carried mass load plate installation bolt of 13 crossbeam 14
The guide beam installing plate of 15 guide beam 151
The guide beam reinforcing plate of 152 guide beam main body 153
The guide bearing installing plate of 154 guide beam location-plate 16
The guide beam mounting hole of 161 lead jack 162
The lead mounting seat of 163 guide bearing mounting hole 17
The linear bearing installing plate of 18 nonspring carried mass load plate installation bolt 19
20 nonspring carried mass are oriented to and use the servo actuator of linear bearing 21
The 22 vibration fore-sets of sewing platform base 23
24 shock absorber connecting plates
The reach of a nonspring carried mass load plate installation bolts
The non-processing section length of b nonspring carried mass load plate installation bolts
The total length of c nonspring carried mass load plate installation bolts
The diameter of d nonspring carried mass load plate installation bolts
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
A kind of multi-functional a quarter vehicle suspension characteristic test experimental bench, including two degrees of freedom suspension performance test mould
Formula, single-degree-of-freedom suspension performance test pattern and spring performance test pattern.
As shown in figure 1, the experimental bench of two degrees of freedom suspension performance test pattern includes gantry frame, mechanical platform 2, combination
Formula spring damping and vibration isolating device 3, nonspring carried mass pedestal 4, spring bottom supporting plate 5, sprung parts 6, spring top supporting plate 7,
Lead 8, spring carried mass are oriented to linear bearing 9, loading case 10, guide beam 15, guide bearing installing plate 16, nonspring carried mass
Load plate installation bolt 18, servo actuator 21 and shock absorber connecting plate 24.
The gantry frame includes being arranged horizontally in the vibration sewing platform base 22 on ground, being vertically fixed in vibration sewing platform base a pair
The longeron 1 of 22 upper surfaces left and right ends, be fixed in the upper end of longeron 1 increase longeron 12 and vertical with increasing the upper end of longeron 12 solid
The crossbeam 13 connect.
Guide beam 15 is horizontally disposed, and position is adjustably affixed with the longeron 1 of gantry frame.
The cylinder body of the servo actuator 21 is vertically fixed in the vibration upper surface middle part of sewing platform base 22, servo actuator 21
Piston rod extends upward.
The mechanical platform 2 is affixed by the upper end of flange and bolt and the piston rod of servo actuator 21.
The top of the combined type spring shock absorption damping shock absorber 3 is affixed by bolt and shock absorber connecting plate 24, bottom
It is affixed by bolt and mechanical platform 2.
The upper surface of mechanical platform 2 is fixedly connected with linear bearing installing plate 19.
The shock absorber connecting plate 24 is connected by nonspring carried mass pedestal 4 with the spring bottom supporting plate 5 being positioned above
Connect.
As shown in Fig. 2 the nonspring carried mass load plate installation bolt 18, which is bolt, is oriented to integrative-structure, both it had been that non-spring carries
The installation bolt of quality load plate, is the lead of nonspring carried mass again, and it includes threaded portion and smooth cylindrical portion；Its total length
C is 600mm, and reach a is 260mm, and non-processing section length b is 80mm, and diameter d is 30mm.
The threaded portion of two symmetrically arranged nonspring carried mass load plate installation bolts 18 passes perpendicularly through shock absorber connecting plate
24 and spring bottom supporting plate 5, and be fastened by bolts, for the nonspring carried mass in simulated suspension；Nonspring carried mass loads
The smooth cylindrical portion insertion of plate installation bolt 18 is arranged on the nonspring carried mass guiding linear axis on linear bearing installing plate 19
Hold in 20, for ensureing that nonspring carried mass only carries out catenary motion.
The bottom of the sprung parts 6 and spring bottom supporting plate 5 are affixed, and top and spring top supporting plate 7 are affixed.
The sprung parts 6 are air spring, helical spring, hydro-pneumatic spring or shock absorber.
The spring top supporting plate 7 is triangular structure, three corners of its upper surface and with three corners
The lower surface of corresponding loading case 10, is provided with the lead mounting seat 17 for fixed guide post 8.
As shown in figure 3, guide beam 15 includes guide beam installing plate 151, guide beam main body 152 and guide beam location-plate 154.
Two guide beam installing plates 151 are separately positioned on the left and right ends of guide beam main body 152, affixed by bolt and longeron 1；It is oriented to
Beam location-plate 154 is arranged in the middle part of the lower surface of guide beam main body 152, affixed by bolt and guide bearing installing plate 16.It is excellent
Selection of land, guide beam reinforcing plate 153 is provided between guide beam installing plate 151 and guide beam main body 152.
As shown in figure 4, the shape of the guide bearing installing plate 16 is identical with the shape of spring top supporting plate 7, it is oriented to
Three corners of bearing installing plate 16 correspond to lead mounting seat 17 and are provided with lead jack 161, the week of lead jack 161
Enclose and be provided with guide bearing mounting hole 163, bolt passes through the guide bearing mounting hole 163, by spring carried mass guiding linear axis
Hold 9 upper surfaces for being fixed in guide bearing installing plate 16；The middle part of guide bearing installing plate 16 sets guide beam mounting hole 162,
For being fixed with the bolt of guide beam location-plate 154.
Lead 8 is oriented to through lead jack 161 and spring carried mass and uses linear bearing 9, is supported respectively with spring top
The lead mounting seat 17 of the upper surface of plate 7 and loading case 10 lower surface is affixed.
The spring charge material of multigroup arranged stacked is connected with the loading case 10 by spring carried mass load plate installation bolt 14
Load plate 11 is measured, passes through padded block gap between every group of mounted mass load plate 11.
The tire of tested suspension is simulated with combined type spring shock absorption damping shock absorber 3, not only can effectively reduce experiment
The size of stand, simplifies the structure of experimental stand, and can ensure that experimental stand can truly reflect the characteristic of suspension.
Multiple bolts hole are reserved with the longeron 1, can be according to the installation position of the specific size selection guide beam of test block
Put, avoid when carrying out the experiment of different suspension performances, it is necessary to re-replace longeron, save experimental cost.
The power of the servo actuator 21 comes from hydraulic system, electromagnetic system or mechanical system.
As shown in figure 5, the combined type spring shock absorption damping for removing the experimental bench of two degrees of freedom suspension performance test pattern subtracts
Shaken device 3, and nonspring carried mass pedestal 4 is directly installed on mechanical platform 2, removes linear bearing installing plate 19 and nonspring carried mass
Guiding linear bearing 20, the installation site of guide beam 15 is adjusted, just form the reality of single-degree-of-freedom suspension performance test pattern
Test platform.
As shown in fig. 6, on the basis of the experimental bench of the test pattern of single-degree-of-freedom suspension performance shown in Fig. 5, remove loading
Case 10, spring carried mass load plate 11 and spring carried mass are oriented to and use linear bearing 9, and three leads 8 are replaced with fore-set 23, are adjusted
The installation site of guide beam 15, just form the experimental bench of spring performance test pattern.
The course of work of the present invention is as follows：
When carrying out two degrees of freedom suspension performance test experiments, as shown in Figure 1.Under inactive state, the piston of servo actuator 21
Bar is in complete retracted position.When carrying out suspension performance test, it is necessary to be carried according to the spring carried mass of tested suspension and non-spring
Quality, load spring carried mass load plate 11 identical in quality therewith and spring bottom supporting plate 5；Start the dynamic of servo actuator 21
Force system (such as hydraulic system) is to adjust the piston position of servo actuator 21 so that spring heights reach balance height and simultaneously kept
It is motionless.Now, spring carried mass is oriented to the centre position that lead 8 is in linear bearing 9.
The suspension performance (stiffness characteristics, damping characteristic, damping behavior etc.) tested as needed, adjust servo actuator 21
The motion-activated of piston rod.Now, piston rod drives combined type spring shock absorption damping shock absorber 3 to be vibrated, by combined type
The vibration damping of spring shock absorption damping shock absorber 3, vibration is passed into nonspring carried mass pedestal 4 and spring bottom supporting plate 5.In straight line
In the presence of bearing installing plate 19 and nonspring carried mass guiding use linear bearing 20, nonspring carried mass pedestal 4 and spring bottom branch
Fagging 5 follows piston rod only to do catenary motion.Spring bottom supporting plate 5 further passes motion to sprung parts 6, by bullet
Spring top supporting plate 7 is passed to after the buffer shock-absorbing of spring.Spring top supporting plate 7 drives lead 8 and loading case about 10
Motion.Guide beam 15, spring carried mass guiding linear bearing 9 and guide bearing installing plate 16 can ensure to load case 10 and spring charge material
Amount load plate 11 only does catenary motion, ensure that the security of experimentation.
As shown in figure 5, removing combined type spring shock absorption damping shock absorber 3, nonspring carried mass pedestal 4 is directly installed on machine
On tool platform 2, remove linear bearing installing plate 19 and nonspring carried mass is oriented to and uses linear bearing 20, adjust the installation of guide beam 15
Position, just form the experimental bench of single-degree-of-freedom suspension performance test pattern.When carrying out single-degree-of-freedom suspension performance test experiments,
Under inactive state, the piston rod of servo actuator 21 is in complete retracted position.When being tested, it is necessary to according to tested suspension
Spring carried mass, loading spring carried mass load plate 11 identical in quality therewith, start dynamical system (such as liquid of servo actuator 21
Pressure system) to adjust the piston position of servo actuator 21 so that spring heights reach balance height and simultaneously remained stationary as.Now,
Spring carried mass is oriented to the centre position that lead 8 is in linear bearing 9.
The suspension performance (stiffness characteristics, damping characteristic, damping behavior etc.) tested as needed, adjust servo actuator 21
The motion-activated of piston rod.Now, piston rod vibration passes to nonspring carried mass pedestal 4 and spring bottom supporting plate 5.Spring bottom
Portion's supporting plate 5 further passes motion to sprung parts 6, and spring top supporting plate is passed to after the buffer shock-absorbing of spring
7.Spring top supporting plate 7 drives lead 8 and loading case 10 to move up and down.
As shown in fig. 6, on the basis of the experimental bench of Fig. 5 single-degree-of-freedom suspension performance test patterns, remove loading case 10,
Spring carried mass load plate 11 and spring carried mass, which are oriented to, uses linear bearing 9, three leads 8 is replaced with fore-set 23, adjustment is oriented to
The installation site of beam 15, just form spring performance experimental stand device.Under inactive state, the piston rod of servo actuator 21 is in
Complete retracted position.When carrying out spring performance test, start the dynamical system (such as hydraulic system) of servo actuator 21 with tune
The piston position of whole servo actuator 21 so that spring heights reach balance height and remained stationary as.The bullet tested as needed
Spring characteristic, adjust the motion-activated of the piston rod of servo actuator 21.Now, piston rod vibration passes to nonspring carried mass pedestal 4
With spring bottom supporting plate 5.Spring bottom supporting plate 5 further passes motion to sprung parts 6 and fore-set 23, final to transmit
To guide beam 15.
Claims (7)
- A kind of 1. multi-functional a quarter vehicle suspension characteristic test experimental bench, it is characterised in that：The experimental bench includes gantry frame It is frame, mechanical platform (2), combined type spring damping and vibration isolating device (3), nonspring carried mass pedestal (4), spring bottom supporting plate (5), outstanding Frame part (6), spring top supporting plate (7), lead (8), spring carried mass guiding linear bearing (9), loading case (10), lead To beam (15), guide bearing installing plate (16), nonspring carried mass load plate installation bolt (18), servo actuator (21) and vibration damping Device connecting plate (24)；The gantry frame includes being arranged horizontally in the vibration sewing platform base (22) on ground and is vertically fixed in vibration stylobate a pair The longeron (1) of seat (22) upper surface left and right ends；The cylinder body of the servo actuator (21) is vertically fixed in vibration sewing platform base (22) upper surface middle part, servo actuator (21) Piston rod extend upward；The mechanical platform (2) and the upper end of the piston rod of servo actuator (21) are affixed；The top of the combined type spring shock absorption damping shock absorber (3) and shock absorber connecting plate (24) are affixed, and bottom is put down with machinery Platform (2) is affixed；Linear bearing installing plate (19) is fixedly connected with the mechanical platform (2)；The shock absorber connecting plate (24) is connected by nonspring carried mass pedestal (4) with spring bottom supporting plate (5)；The nonspring carried mass load plate installation bolt (18) includes threaded portion and smooth cylindrical portion；The threaded portion of two symmetrically arranged nonspring carried mass load plate installation bolts (18) vertically with shock absorber connecting plate (24) Affixed with spring bottom supporting plate (5), the insertion of smooth cylindrical portion is arranged on the nonspring carried mass on linear bearing installing plate (19) It is oriented to in linear bearing (20)；The bottom of the sprung parts (6) and spring bottom supporting plate (5) are affixed, and top and spring top supporting plate (7) are affixed；The spring top supporting plate (7) is triangular structure, three corners of its upper surface and with three corners pair The lower surface for the loading case (10) answered, is provided with lead mounting seat (17)；It is affixed with guide bearing installing plate (16) in the middle part of the lower surface of guide beam (15)；The shape of the guide bearing installing plate (16) is identical with the shape of spring top supporting plate (7), guide bearing installing plate (16) three corners correspond to lead mounting seat (17) and are provided with lead jack (161), around lead jack (161) Guide bearing mounting hole (163) is provided with, spring carried mass is oriented to be installed with linear bearing (9) by bolt through the guide bearing Hole (163) is fixed in the upper surface of guide bearing installing plate (16)；Lead (8) through lead jack (161) and spring carried mass guiding use linear bearing (9), respectively with spring top branch The lead mounting seat (17) of fagging (7) upper surface and loading case (10) lower surface is affixed.
- 2. multi-functional a quarter vehicle suspension characteristic test experimental bench according to claim 1, it is characterised in that：It is described Sprung parts (6) are air spring, helical spring, hydro-pneumatic spring or shock absorber.
- 3. multi-functional a quarter vehicle suspension characteristic test experimental bench according to claim 1, it is characterised in that：It is described Guide beam (15) includes guide beam installing plate (151), guide beam main body (152) and guide beam location-plate (154)；Two guide beams Installing plate (151) is separately positioned on the left and right ends of guide beam main body (152), and affixed with longeron (1)；Guide beam location-plate (154) it is arranged in the middle part of the lower surface of guide beam main body (152), it is affixed by bolt and guide bearing installing plate (16).
- 4. multi-functional a quarter vehicle suspension characteristic test experimental bench according to claim 3, it is characterised in that：It is oriented to Guide beam reinforcing plate (153) is provided between beam installing plate (151) and guide beam main body (152).
- 5. multi-functional a quarter vehicle suspension characteristic test experimental bench according to claim 1, it is characterised in that：It is described The spring carried mass load plate of multigroup arranged stacked is connected with loading case (10) by spring carried mass load plate installation bolt (14) (11)。
- 6. multi-functional a quarter vehicle suspension characteristic test experimental bench according to claim 5, it is characterised in that：Every group Mounted mass load plate passes through padded block gap between (11).
- 7. multi-functional a quarter vehicle suspension characteristic test experimental bench according to claim 1, it is characterised in that：It is described The power of servo actuator (21) comes from hydraulic system, electromagnetic system or mechanical system.
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| CN108692956A (en) * | 2018-04-09 | 2018-10-23 | 杭州亿恒科技有限公司 | Double crossbeam Vehicle Suspension Vibration experimental rigs and method |
| CN109556892A (en) * | 2018-11-30 | 2019-04-02 | 重庆程顺汽车配件制造有限公司 | It is a kind of for testing the device of automobile absorber |
| CN111307474A (en) * | 2020-03-11 | 2020-06-19 | 清友(苏州)汽车技术有限公司 | Method for testing vibration isolation performance of automotive suspension spring gasket based on MTS loading device |
| CN114061932A (en) * | 2021-11-17 | 2022-02-18 | 上海新纪元机器人有限公司 | Multilayer floating test board |
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