CN220602947U - Excitation loading mechanism for static load modal test of vehicle tire - Google Patents
Excitation loading mechanism for static load modal test of vehicle tire Download PDFInfo
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- CN220602947U CN220602947U CN202321416742.3U CN202321416742U CN220602947U CN 220602947 U CN220602947 U CN 220602947U CN 202321416742 U CN202321416742 U CN 202321416742U CN 220602947 U CN220602947 U CN 220602947U
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- 230000005284 excitation Effects 0.000 title claims abstract description 94
- 230000003068 static effect Effects 0.000 title claims abstract description 35
- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 230000007246 mechanism Effects 0.000 title claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 239000000178 monomer Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The utility model discloses an excitation loading mechanism for testing a static load mode of a vehicle tire, which comprises an I-shaped base and a sample fixing base, wherein a hub adapter is arranged at the top main shaft end of the sample fixing base, a Z-direction rigidity measuring scale is arranged on the back surface of a fixing plate, a horizontal excitation platform is arranged on a main loading platform, a rolling bearing is arranged at the center of the bottom end surface of the horizontal excitation platform, the bottom of the main loading platform is supported by two groups of air springs, and a vibration exciter is fixedly assembled on the outer side of the main loading platform through a vibration exciter mounting seat. The utility model can realize the Z-direction static load of the tyre to be tested and the x, Y and Z-direction excitation method on the static load surface at the same time; the structural design of the main loading platform and the horizontal excitation platform enables the main loading platform to simultaneously meet the requirements of structural strength, first-order natural frequency and dead weight light weight, and the requirement of a loading surface, namely an excitation surface, is realized, so that the bench test result is more close to the vibration transmission characteristic under the actual working condition.
Description
Technical Field
The utility model relates to the field of tire excitation testing, in particular to an excitation loading mechanism for vehicle tire static load modal testing.
Background
When the vehicle runs, the tires are subjected to ground supporting force and simultaneously are subjected to vibration excitation transmitted by the ground due to the unevenness of the ground; the excitation is transmitted into the vehicle through the structures such as a tire, a rim, a frame and the like, and is perceived by passengers in the form of vibration or noise, so that the driving feeling is influenced; to study this problem, it is necessary to study the vibration transfer characteristics of the respective subsystems on the vibration transfer path, and tire & rim is a key ring to be studied;
in order to study the vibration transfer characteristics of tire & rim systems, methods used in engineering are:
A. the method comprises the steps of enabling a tire and a rim to be in a free suspension state, selecting a specific excitation point and a specific measurement point for excitation and measurement, and establishing a mode model of a tested piece; however, during long periods of time, significant differences in modal characteristics exhibited by the tire and rim system in the free state and the operating mode state were found; the result obtained by the method has obvious deviation on the vibration transmission characteristics under the research actual working conditions;
B. static load constraint mode test; fixing the tire and the rim on a specific bracket, and applying vertical static load on the surface of the tire; this approach has been similar to that of this patent; because the space is occupied by the loading mechanism, the tire loading surface of the scheme cannot be used as an excitation point and a test point; the loading surface is also an excitation surface under the actual working condition; therefore, the mode model established by the method cannot accurately express the vibration transmission characteristics under the actual working conditions;
according to the above, the B test method is improved in the scheme, so that the requirement of a loading surface, namely an excitation surface, is met, and the bench test result is closer to the vibration transmission characteristic under the actual working condition.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide an excitation loading mechanism for testing the static load mode of a vehicle tire.
The utility model provides the following technical scheme:
the utility model provides an excitation loading mechanism for testing a static load mode of a vehicle tire, which comprises an I-shaped base and a sample fixing base, wherein the sample fixing base is slidably installed on a top slide rail surface of the I-shaped base through an iron floor module, a hub adapter is installed at a top main shaft end of the sample fixing base, a linear slide rail is installed on the outer side of the sample fixing base through a fixing plate, a Z-direction rigidity measuring scale is arranged on the back surface of the fixing plate, a main loading platform is slidably installed on the outer side surface of the linear slide rail through a slide block, a threaded hole is formed in the main loading platform, a horizontal excitation platform is arranged on the main loading platform, a rolling bearing is installed at the center of the bottom end surface of the horizontal excitation platform, the bottom of the main loading platform is supported through two groups of air springs, and an exciter is fixedly installed on the outer side of the main loading platform through an exciter mounting seat.
As a preferable technical scheme of the utility model, the air spring is externally connected with the air pump to charge compressed air, so that the main loading platform can be lifted and lowered through the linear slide rail, and the distance between the main loading platform and the horizontal excitation platform can be adjusted.
As a preferable technical scheme of the utility model, the end part of the excitation rod of the vibration exciter is connected with the end part of the rolling bearing on the bottom surface of the horizontal excitation platform, and the vibration exciter is arranged on the X-direction outer side surface or the Y-direction outer side surface of the main loading platform.
As a preferable technical scheme of the utility model, a dynamic force sensor can be connected in series between the top main shaft end part of the sample fixing base and the hub adapter.
As a preferable technical scheme of the utility model, the main loading platform and the horizontal excitation platform are prepared from magnesium alloy or titanium alloy, the bottom surface of the main loading platform is provided with rib plates and lightening holes to strengthen the structural rigidity of the main loading platform, and the bottom surface of the horizontal excitation platform is provided with a plurality of mutually staggered ribs to strengthen the structural rigidity of the horizontal excitation platform.
As a preferable technical scheme of the utility model, the upper surface of the horizontal excitation platform is frosted or rolled or stuck with friction plates with different friction coefficients.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model can simultaneously realize the Z-direction static load loading and X, Y, Z-direction excitation method on the static load loading surface of the tyre to be tested; the structural design of the main loading platform and the horizontal excitation platform enables the main loading platform to simultaneously meet the requirements of structural strength, first-order natural frequency and dead weight light weight, and the requirement of a loading surface, namely an excitation surface, is realized, so that the bench test result is more close to the vibration transmission characteristic under the actual working condition.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic diagram of a master loading platform of the present utility model;
FIG. 3 is a schematic of a horizontal excitation platform of the present utility model;
FIG. 4 is a schematic view of the structure of the vibration exciter of the present utility model;
FIG. 5 is a schematic view of the Z-stiffness measurement scale of the present utility model;
FIG. 6 is a state diagram of an end-fitting hub adapter of a sample mounting base of the present utility model;
FIG. 7 is a bottom view of the horizontal excitation platform of the present utility model;
FIG. 8 is a schematic diagram of an embodiment of the present utility model in an X-direction modality test;
FIG. 9 is a schematic diagram of an embodiment of the present utility model in a Y-direction modality test;
FIG. 10 is a schematic diagram of an embodiment of the utility model in a Z-directed mode test;
in the figure: 1. an I-shaped base; 2. a sample fixing base; 3. a ferrous floor module; 4. a hub adapter; 5. a linear slide rail; 6. z-direction rigidity measuring scale; 7. a main loading platform; 8. a horizontal excitation platform; 9. a rolling bearing; 10. an air spring; 11. a vibration exciter mounting seat; 12. a vibration exciter;
71. and (3) a threaded hole.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model. Wherein like reference numerals refer to like elements throughout.
Further, if detailed description of the known art is not necessary to illustrate the features of the present utility model, it will be omitted. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
Example 1
As shown in fig. 1-10, the utility model provides an excitation loading mechanism for testing a static load mode of a vehicle tire, which comprises an I-shaped base 1 and a sample fixing base 2, wherein the sample fixing base 2 is slidably installed on a top slide rail surface of the I-shaped base 1 through an iron floor module 3, a hub adapter 4 is installed at a top spindle end of the sample fixing base 2, a linear slide rail 5 is installed on the outer side of the sample fixing base 2 through a fixing plate, a Z-direction rigidity measuring scale 6 is arranged on the back surface of the fixing plate, a main loading platform 7 is slidably installed on the outer side surface of the linear slide rail 5 through a sliding block, a threaded hole 71 is arranged on the main loading platform 7, a horizontal excitation platform 8 is arranged on the main loading platform 7, a rolling bearing 9 is installed at the center of the bottom end surface of the horizontal excitation platform 8, the bottom of the main loading platform 7 is supported through two groups of air springs 10, and an exciter 12 is fixedly installed on the outer side of the main loading platform 7 through an exciter mounting seat 11.
The air spring 10 is externally connected with an air pump to charge compressed air, so that the main loading platform 7 can be lifted and lowered through the linear slide rail 5, and the distance between the main loading platform 7 and the horizontal excitation platform 8 can be adjusted.
The end of the excitation rod of the vibration exciter 12 is connected with the end of the rolling bearing 9 on the bottom surface of the horizontal excitation platform 8, and the vibration exciter 12 is arranged on the X-direction outer side surface or the Y-direction outer side surface of the main loading platform 7.
A dynamic force sensor can be connected in series between the top spindle end of the sample fixing base 2 and the hub adapter 4.
The main loading platform 7 and the horizontal excitation platform 8 are prepared from magnesium alloy or titanium alloy, the bottom surface of the main loading platform 7 is provided with rib plates and lightening holes to strengthen the structural rigidity of the main loading platform, and the bottom surface of the horizontal excitation platform 8 is provided with a plurality of ribs which are staggered with each other to strengthen the structural rigidity of the main loading platform.
Further, the working principle of the device is as follows:
mounting a tire sample at the top end shaft of the sample fixing base 2, as shown in fig. 6, the functions of the main loading platform 7 include the following:
(1) Transmitting a static load force which is upwards applied to a tested tire sample piece by an air spring, wherein the static load force comprises a X, Y, Z direction excitation test and a stiffness test;
(2) When a vertical (Z-direction) excitation test is performed, the bottom is connected with an exciter, and vibration is directly transmitted to a tested tire sample piece through the house platform 7 without a horizontal excitation platform 8;
the vibration exciter 12 is a general standard experimental device;
the function is as follows: outputting vibration excitation to the outside;
when X, Y vibration test is carried out, the vibration exciter 12 is connected with the horizontal excitation platform 8 through an excitation rod, so that vibration excitation is transmitted to a tire piece to be tested;
when Z-direction vibration test is performed, the vibration exciter 12 is connected with the main loading platform 7 through the vibration exciting rod, so that vibration excitation is transmitted to a tire piece to be tested;
the specific working principle is as follows:
the main loading platform 7 is driven by the air spring 10, no external driving equipment is needed, when static load loading is carried out, the air spring 10 is inflated, the height of the air spring 10 is increased, and the main loading platform 7 is driven to ascend; after contacting with the tyre surface of the tested piece, the tyre is stressed and deformed gradually; when the loading requirement is met, the air spring 10 is stopped to be inflated, and the upward force of the air spring 10 and the downward force of the tire are balanced;
a dynamic force sensor can be connected in series between the hub adapter 4 and the connecting shaft of the sample fixed base 2 and is used for measuring the wheel center force; dynamic force sensors are of various types, and the testing principle is as follows: 3-4 3-direction force sensor units (LC) are arranged between the base plate and the top plate, so that each sensor unit is positioned on the same pitch circle; (the base plate is fixed with the flange surface of the sample fixing seat, and the top plate is fixed with the rim (or the rim adapter 4) of the measured piece); each sensor cell outputs three directional forces (Fxi, fyi, fzi); the output of all the sensor monomers is collected and specific operation is carried out, so that the loads (forces: fx, fy, fz, moments: mx, my, mz) of the measured piece wheel core in 6 directions can be obtained;
the main loading platform 7 and the horizontal excitation platform 8 need to transmit vibration excitation of the vibration exciter 12 to the tested piece, and the self weight of the vibration exciter has direct influence on experimental performance; in short, the greater its mass, the more vibration energy it consumes itself, and the less vibration energy is applied to the test piece; therefore, its own weight must be controlled;
meanwhile, the main loading platform 7 and the horizontal excitation platform 8 are in direct contact with the tested piece, and the natural frequency of the main loading platform and the horizontal excitation platform needs to avoid the frequency range of the tested piece, which is concerned by testing, and the natural frequency needs to be larger than 250Hz;
based on the two points, the materials of the main loading platform 7 and the horizontal excitation platform 8 are required to meet the requirements of low density and high hardness at the same time, and magnesium alloy and titanium alloy are considered as standby materials; in terms of structure, the rigidity of the self-body is enhanced by arranging ribs and rib plates, and the dead weight is optimized by arranging lightening holes, as shown in fig. 2 and 7;
the upper surface of the horizontal excitation platform 8 is specially treated to control the friction coefficient, so that excitation energy output by the vibration exciter 12 is ensured to be transmitted to the tire piece to be tested, and the treatment mode comprises the following three modes:
1. the scheme is simple and easy to implement, but the friction coefficient is not high, and the method is suitable for tires with softer materials;
2. the surface of the horizontal excitation platform 8 is subjected to hard oxidation after knurling;
3. the friction plates with different meshes (friction coefficients) are adhered on the surface of the horizontal excitation platform 8, so that the friction plates can be replaced according to requirements, and the abrasion is easy to occur after the horizontal excitation platform is used for a long time; the third approach is recommended.
The main loading platform 7 can move in the Z direction under the constraint of the linear slide rail 5; under the drive of the lower air springs 10 (two groups), static load is loaded on the tyre to be tested;
during the X-direction modal test (as shown in fig. 8), arranging a horizontal excitation platform 8 along the X direction, arranging the vibration exciter 12 according to X-direction excitation after static load loading is completed, connecting an excitation rod of the vibration exciter 12 and locking by using a nut; the horizontal excitation platform 8 transmits excitation to the surface of the tyre of the tested piece under the driving of the exciter 12; meanwhile, Z-direction static load and X-direction excitation on a static load surface of the measured piece are realized;
during Y-direction modal test (as shown in fig. 9), arranging a horizontal excitation platform 8 along the Y direction, arranging a vibration exciter 12 according to 'Y-direction excitation' after static load loading is completed, and installing an excitation rod of the vibration exciter 12 in the same manner as that of X-direction application; the horizontal excitation platform 8 transmits excitation to the surface of the tyre of the tested piece under the driving of the exciter 12; meanwhile, Z-direction static load and Y-direction excitation on a static load surface of the measured piece are realized;
during Z-direction mode test (as shown in fig. 10), the horizontal excitation platform 8 is not used, the vibration exciter 12 is arranged according to Z-direction excitation (arranged below the main loading platform 7), the threads of the excitation rod end of the vibration exciter 12 are screwed into the threaded holes in the middle of the lower surface of the main loading platform 7, and the vibration exciter is locked by nuts; the main loading platform 7 transmits excitation to the surface of the tyre of the tested piece under the drive of the vibration exciter 12; meanwhile, Z-direction static load and Z-direction excitation on a static load surface of the measured piece are realized;
when Z-direction rigidity is tested (as shown in fig. 5), a Z-direction rigidity measuring scale 6 is arranged on one side of the back surface of a fixed plate on the outer side of the sample fixing base 2, a pointer is arranged on the side surface of the Z-direction rigidity measuring scale 6, so that the Z-direction rigidity measuring scale 6 can be conveniently pointed to read, the static load loading force of a tested tire piece is regulated to a specific value, and meanwhile, the reading of the Z-direction rigidity measuring scale 6 is read; recording a series of static load loading force and scale readings, and calculating to obtain the rigidity characteristic of the measured piece;
for example, read force sensor output F 1 When=250n, the reading of the Z-direction rigidity measurement scale 6 is H 1 The measured piece is continuously loaded with the material to be measured, and the output F of the force sensor is read again 2 When=1000n, the reading of the Z-direction rigidity measurement scale 6 is H 2 =75mm, then the measured piece stiffness is obtained: d= (F) 2 -F 1 )/(H 2 -H 1 )＝(1000-250)/(75-50)＝30N/mm＝3*10 4 N/m；
The summary of the roles of the main loading platform and the horizontal stimulus platform in different test applications is shown below:
the utility model can simultaneously realize the Z-direction static load loading and X, Y, Z-direction excitation method on the static load loading surface of the tyre to be tested; the structural design of the main loading platform 7 and the horizontal excitation platform 8 ensures that the main loading platform 7 simultaneously meets the requirements of structural strength, first-order natural frequency and weight reduction, realizes the requirement of a loading surface, namely an excitation surface, and ensures that the bench test result is more close to the vibration transfer characteristic under the actual working condition.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The utility model provides an excitation loading mechanism for vehicle tire static load modal test, includes I-shaped base (1) and sample fixed base (2), its characterized in that, sample fixed base (2) are through iron floor module (3) slidable mounting on the top slide rail face of I-shaped base (1), hub adapter (4) are installed to the top main shaft end of sample fixed base (2), linear slide rail (5) are installed through the fixed plate in the outside of sample fixed base (2), the back of fixed plate is provided with Z to rigidity measurement scale (6), main loading platform (7) are installed through slider slidable mounting on the lateral surface of linear slide rail (5), be provided with screw hole (71) on main loading platform (7), be provided with horizontal excitation platform (8) on main loading platform (7), antifriction bearing (9) are installed in bottom face central authorities department of horizontal excitation platform (8), the bottom of main loading platform (7) is supported through two sets of air spring (10), vibration exciter (12) are installed through slider fixed vibration exciter (11) in the outside of main loading platform (7).
2. The excitation loading mechanism for vehicle tire static load modal testing according to claim 1, wherein the air spring (10) is externally connected with an air pump to charge compressed air, so that the main loading platform (7) can be lifted and lowered through the linear slide rail (5), and the distance between the main loading platform (7) and the horizontal excitation platform (8) is adjusted.
3. The excitation loading mechanism for vehicle tire static load modal testing according to claim 2, wherein the end of the excitation rod of the exciter (12) is connected with the end of the rolling bearing (9) on the bottom surface of the horizontal excitation platform (8), and the exciter (12) is arranged on the X-direction outer side surface or the Y-direction outer side surface of the main loading platform (7).
4. An excitation loading mechanism for vehicle tyre static load modal testing according to claim 1, characterized in that a dynamic force sensor can be connected in series between the top spindle end of the sample fixed base (2) and the hub adapter (4).
5. The excitation loading mechanism for vehicle tire static load modal testing according to claim 1, wherein the main loading platform (7) and the horizontal excitation platform (8) are made of magnesium alloy or titanium alloy, the bottom surface of the main loading platform (7) is provided with rib plates and lightening holes to strengthen the structural rigidity of the main loading platform, and the bottom surface of the horizontal excitation platform (8) is provided with a plurality of mutually staggered rib plates to strengthen the structural rigidity of the main loading platform.
6. Excitation loading mechanism for vehicle tyre static load modal testing according to claim 1, characterized in that the upper surface of the horizontal excitation platform (8) is frosted or knurled or stuck with friction plates with different friction coefficients.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321416742.3U CN220602947U (en) | 2023-06-06 | 2023-06-06 | Excitation loading mechanism for static load modal test of vehicle tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321416742.3U CN220602947U (en) | 2023-06-06 | 2023-06-06 | Excitation loading mechanism for static load modal test of vehicle tire |
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| Publication Number | Publication Date |
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| CN220602947U true CN220602947U (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321416742.3U Active CN220602947U (en) | 2023-06-06 | 2023-06-06 | Excitation loading mechanism for static load modal test of vehicle tire |
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| Country | Link |
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| CN (1) | CN220602947U (en) |
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2023
- 2023-06-06 CN CN202321416742.3U patent/CN220602947U/en active Active
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