Tire static rigidity test bench

Abstract

The invention relates to a tire static rigidity test bench, which comprises a bottom plate, a vertical lifting mechanism, a rotary supporting mechanism, a lateral movement mechanism and an outward inclination mechanism, and is characterized in that the bottom plate is provided with a tire mounting base, the tire mounting base is provided with a tire mounting mechanism, and the tire mounting mechanism is used for mounting a wheel; the vertical lifting mechanism is mounted on one side of the base, the vertical lifting mechanism is located below the tire mounting mechanism, and the vertical lifting mechanism is provided with a vertical displacement sensor; the rotary supporting mechanism is mounted on the vertical lifting mechanism, and the rotary supporting mechanism is provided with a rotation angle sensor; the lateral movement mechanism is installed on the rotary supporting mechanism and provided with a lateral movement sensor. The outward inclination mechanism is mounted on the lateral movement mechanism and is provided with an outward inclination angle sensor; the tire static rigidity test bench further comprises a six-component sensor used for being installed on a hub of a wheel.

Description

Technical Field

[0001] This application relates to the field of tire performance testing, and particularly to a tire static stiffness test bench. Background Art

[0002] Currently, tires not only need to support the entire weight and load of a vehicle, but also need to transmit traction and braking torques in multiple directions to reduce vibrations, impact forces, and noises generated during vehicle driving, and ensure the safety and stability of vehicle driving. The tire model is a key component of the digital design of vehicle dynamics. The establishment of the tire model requires static, steady-state, and dynamic tests of the tire. Among them, the tire static stiffness test is the key to establishing the tire model.

[0003] In related technologies, the tire static stiffness test only loads the tire in a single direction and tests the vertical stiffness, longitudinal stiffness, lateral stiffness, and torsional stiffness of the tire in a small angle range. The data provided for the establishment of the tire model is less, and the tire model cannot be accurately established.

[0004] Therefore, it is necessary to design a new tire static stiffness test bench to overcome the above problems. Summary of the Invention

[0005] This application provides a tire static stiffness test bench, which can solve the technical problems in related technologies that the tire static stiffness test only loads the tire in a single direction and tests the vertical stiffness, longitudinal stiffness, lateral stiffness, and torsional stiffness of the tire in a small angle range, and the data provided for the establishment of the tire model is less, and the tire model cannot be accurately established.

[0006] In a first aspect, an embodiment of this application provides a tire static stiffness test bench, which includes: a bottom plate, a vertical lifting mechanism, a rotary support mechanism, a side shift mechanism, and a camber mechanism. The bottom plate is provided with a tire mounting base, and the tire mounting base is provided with a tire mounting mechanism for mounting a wheel; the vertical lifting mechanism is installed on one side of the base and is located below the tire mounting mechanism, and the vertical lifting mechanism is provided with a vertical displacement sensor; the rotary support mechanism is installed on the vertical lifting mechanism, and the rotary support mechanism is provided with a rotary angle sensor; the side shift mechanism is installed on the rotary support mechanism, and the side shift mechanism is provided with a side shift displacement sensor; the camber mechanism is installed on the side shift mechanism, and the camber mechanism is provided with a camber angle sensor; the tire static stiffness test bench further includes a six-component force sensor for mounting on the hub of the wheel.

[0007] In combination with the first aspect, in one embodiment, the vertical lifting mechanism includes a plurality of guide columns fixed to the bottom plate. A vertical lifting platform is sleeved on the plurality of guide columns. A vertical lifting drive mechanism is provided at the bottom of the vertical lifting platform. The vertical lifting drive mechanism is configured to drive the vertical lifting platform to lift or lower; the tire mounting base is provided with at least two vertical guide rails. Each vertical guide rail is provided with a vertical slider in a sliding manner. The vertical slider is fixed to the vertical lifting platform, and the vertical slider is fixed to the vertical displacement sensor.

[0008] In combination with the first aspect, in one embodiment, the vertical lifting drive mechanism includes a vertical lifting base. The vertical lifting base is installed at the bottom of the vertical lifting platform. The vertical lifting base is provided with a lifting platform drive motor and a lifter speed reducer. The lifting platform drive motor is connected to the lifter speed reducer. The lifter speed reducer is connected with a lifting screw. The lifting screw is fixed to the vertical lifting platform through a lifting platform flange. The lifting platform drive motor is configured to drive the vertical lifting platform to lift or lower through the lifting screw.

[0009] In combination with the first aspect, in one embodiment, the rotary support mechanism includes a fixed ring, a moving ring and a rotary drive motor. The fixed ring is fixedly arranged on the vertical lifting mechanism. The moving ring is sleeved outside the fixed ring. The moving ring is provided with a rotary platform. The rotary drive motor is connected to the moving ring through an output shaft. The rotary drive motor is configured to drive the rotary platform to rotate through the moving ring. The rotary angle sensor is arranged on the output shaft.

[0010] In combination with the first aspect, in one embodiment, the side shift mechanism includes at least two side shift linear guide rails. A side shift platform is installed on the at least two side shift linear guide rails. A lead screw nut assembly and a side shift drive motor are installed between the at least two side shift linear guide rails. The lead screw nut assembly is connected to the side shift drive motor, and the lead screw nut assembly is connected to the side shift platform. The side shift drive motor is configured to drive the side shift platform to move along the side shift linear guide rails through the lead screw nut assembly. The side shift displacement sensor is installed on the side shift platform.

[0011] In combination with the first aspect, in one embodiment, the lead screw nut assembly includes a side shift lead screw and a nut assembly. The side shift lead screw is in threaded connection with the nut assembly. The side shift lead screw is connected to the side shift drive motor. The nut assembly is fixed to the side shift platform. When the side shift drive motor drives the side shift lead screw to rotate, the nut assembly moves along the axis of the side shift lead screw and drives the side shift platform to move.

[0012] In combination with the first aspect, in one embodiment, the tilting mechanism includes a tilting platform. One end of the tilting platform is connected to the side shifting mechanism through a hinge support, and the other end of the tilting platform is connected to the rotary support mechanism through a tilting jacking bracket. The tilting jacking bracket is connected with a tilting driving motor, and the tilting driving motor is configured to drive one end of the tilting platform to lift. A tilting angle sensor is provided at the connection between the tilting platform and the side shifting mechanism.

[0013] In combination with the first aspect, in one embodiment, the tilting driving motor is threadedly connected to the tilting jacking bracket through a tilting screw. When the tilting driving motor drives the tilting screw to rotate, the tilting screw drives the tilting jacking bracket to lift and drives one end of the tilting platform to lift.

[0014] In combination with the first aspect, in one embodiment, a wedge block is provided between the tilting platform and the side shifting mechanism, and the tilting platform is provided with a convex block.

[0015] In combination with the first aspect, in one embodiment, the tire mounting mechanism includes an inner shaft fixedly arranged on the tire mounting base. An outer hollow shaft is sleeved on the inner shaft. A hub mounting seat is arranged on one side of the outer hollow shaft away from the tire mounting base, and the hub mounting seat is used for mounting a wheel; the tire mounting base is provided with a plurality of first mounting holes, the outer hollow shaft is provided with a plurality of second mounting holes, and the outer hollow shaft and the tire mounting base are fixed by fasteners passing through the second mounting holes and the first mounting holes.

[0016] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0017] By arranging a tire mounting mechanism on the tire mounting base, the wheel is mounted on the tire mounting base. By sequentially installing a vertical lifting mechanism, a rotary support mechanism, a side shifting mechanism and a tilting mechanism below the tire mounting mechanism, different-direction loading is performed on the wheel in lateral loading tests, longitudinal loading tests and torsional tests. Force and torque data in different directions are obtained through a six-component force sensor, and displacement and angle data in different directions are obtained through a vertical displacement sensor, a rotary angle sensor, a side shifting displacement sensor and a tilting angle sensor, so as to obtain stiffness data of the wheel in different directions, provide key test data for establishing a tire model, and solve the technical problem that in the related art, the tire static stiffness test only performs single-direction loading on the tire and tests the vertical stiffness, longitudinal stiffness, lateral stiffness and torsional stiffness of the tire in a small-angle range, and the data provided for the establishment of the tire model is less and the tire model cannot be accurately established. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a tire static stiffness test bench provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a tire mounting base and a tire mounting mechanism provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of the vertical lifting mechanism provided in the embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of the rotating support mechanism provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of the lateral shift mechanism and the camber mechanism provided in an embodiment of the present application.

[0024] In the figure: 1, bottom plate; 2, tire mounting base; 21, first mounting hole; 3, tire mounting mechanism; 31, inner shaft; 32, outer hollow shaft; 321, second mounting hole; 33, wheel hub mounting seat; 34, bearing; 4, wheel; 5, vertical lifting mechanism; 51, guide column; 52, vertical lifting platform; 53, vertical lifting drive mechanism; 531, vertical lifting base; 532, lifting platform drive motor; 533, lift reducer; 534, lifting screw; 535, lifting platform flange; 54, vertical guide rail; 55, vertical slider; 56, fixed plate; 6, vertical displacement sensor; 7, rotating support mechanism; 71, fixed coil; 72, moving coil; 73, rotating drive motor; 74, rotating platform; 8, rotating angle sensor; 9, lateral shift mechanism; 91, lateral shift linear guide; 92, lateral shift platform; 93, lead screw nut assembly; 931, lateral shift lead screw; 94, lateral shift drive motor; 10, lateral shift displacement sensor; 11, camber mechanism; 111, camber platform; 112, capstan support; 113, camber lifting bracket; 114, camber drive motor; 115, wedge block; 116, bump; 12, camber angle sensor; 13, six-component force sensor. DETAILED DESCRIPTION

[0025] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without making creative efforts belong to the scope of protection of this application.

[0026] The embodiment of this application provides a tire static stiffness test bench, which can solve the technical problem that the tire static stiffness test only loads the tire in a single direction and tests the vertical stiffness, longitudinal stiffness, lateral stiffness and torsional stiffness of the tire in a small angle range, and the data provided for the establishment of the tire model is less, and the tire model cannot be accurately established.

[0027] See Figure 1 and Figures 3 - 5 As shown in and, the embodiment of this application provides a tire static stiffness test bench, which includes: a bottom plate 1, a vertical lifting mechanism 5, a rotary support mechanism 7, a side shift mechanism 9 and a camber mechanism 11. The bottom plate 1 is provided with a tire mounting base 2, and the tire mounting base 2 is provided with a tire mounting mechanism 3 for mounting a wheel 4; the vertical lifting mechanism 5 is installed on one side of the base, and the vertical lifting mechanism 5 is located below the tire mounting mechanism 3, and the vertical lifting mechanism 5 is provided with a vertical displacement sensor 6; the rotary support mechanism 7 is installed on the vertical lifting mechanism 5, and the rotary support mechanism 7 is provided with a rotary angle sensor 8; the side shift mechanism 9 is installed on the rotary support mechanism 7, and the side shift mechanism 9 is provided with a side shift displacement sensor 10; the camber mechanism 11 is installed on the side shift mechanism 9, and the camber mechanism 11 is provided with a camber angle sensor 12; the tire static stiffness test bench further includes a six-component force sensor 13 for mounting on the hub of the wheel 4.

[0028] In this embodiment, the base plate 1 can be set as a T-slot flat plate, and the base plate 1 is made of high-strength cast iron to ensure the stability of the base plate 1 when bearing loads. A support plate is provided on one side of the tire mounting base 2 away from the tire mounting mechanism 3. The vertical lifting mechanism 5 is used for vertically loading and testing the wheel 4. The six-component force sensor 13 is used to measure the vertical load received by the wheel 4. The vertical displacement sensor 6 is used to measure the vertical deformation displacement of the wheel 4 to obtain the vertical stiffness of the wheel 4. The rotary support mechanism 7 is used to adjust the direction of the load on the wheel 4 to measure the stiffness of the wheel 4 in a larger range. The rotary angle sensor 8 is used to measure the sideslip angle displacement of the wheel 4 to obtain the torsional stiffness of the wheel 4. The side shift mechanism 9 is used for laterally loading and testing the wheel 4. The side shift displacement sensor 10 is used to measure the lateral deformation displacement or longitudinal deformation displacement of the wheel 4 to obtain the lateral stiffness or longitudinal stiffness of the wheel 4. The camber mechanism 11 is used to adjust the angle of the load on the wheel 4 to measure the stiffness of the wheel 4 in a larger range. The tire static stiffness test bench covers a wide range of tire types and can measure the stiffness of the wheel 4 in different directions, providing key test data for establishing a tire model.

[0029] In this embodiment, by arranging the tire mounting mechanism 3 on the tire mounting base 2, the wheel 4 is mounted on the tire mounting base 2. By sequentially installing the vertical lifting mechanism 5, the rotary support mechanism 7, the side shift mechanism 9, and the camber mechanism 11 below the tire mounting mechanism 3, the wheel 4 is loaded in different directions during lateral loading tests, longitudinal loading tests, and torsional tests. Different-direction force and torque data are obtained through the six-component force sensor 13, and different-direction displacement and angle data are obtained through the vertical displacement sensor 6, the rotary angle sensor 8, the side shift displacement sensor 10, and the camber angle sensor 12, so as to obtain the stiffness data of the wheel 4 in different directions, providing key test data for establishing a tire model, and solving the technical problem in the related art that the tire static stiffness test only loads the tire in a single direction and tests the vertical stiffness, longitudinal stiffness, lateral stiffness, and torsional stiffness of the tire in a small angle range, and the data provided for the establishment of the tire model is less, making it impossible to accurately establish the tire model.

[0030] Further, refer to Figures 1 - 3As shown, in some embodiments, the vertical lifting mechanism 5 includes a plurality of guide columns 51 fixed to the bottom plate 1. A vertical lifting platform 52 is sleeved on the plurality of guide columns 51. A vertical lifting drive mechanism 53 is provided at the bottom of the vertical lifting platform 52. The vertical lifting drive mechanism 53 is configured to drive the vertical lifting platform 52 to lift. The tire mounting base 2 is provided with at least two vertical guide rails 54. A vertical slider 55 is slidably arranged on each vertical guide rail 54. The vertical slider 55 is fixed to the vertical lifting platform 52 and the vertical displacement sensor 6 is fixed to the vertical slider 55.

[0031] In this embodiment, the plurality of guide columns 51 can be set to two guide columns 51 or three guide columns 51 or more guide columns 51. Preferably, the plurality of guide columns 51 are set to four guide columns 51. The bottom end of each guide column 51 is fixed to the bottom plate 1 through a fixing plate 56. Each guide column 51 is connected to the vertical lifting platform 52 through a guide sleeve. The vertical lifting drive mechanism 53 is configured to drive the vertical lifting platform 52 to lift, so that the vertical lifting platform 52 moves up and down, thereby realizing the height adjustment of the vertical lifting platform 52 to apply a vertical load to the wheel 4. The vertical lifting platform 52 is limited by the vertical slider 55 to restrict the lateral movement of the vertical lifting platform 52, so that the tire static stiffness test bench meets the lateral loading requirements of the wheel 4 in the lateral loading test, longitudinal loading test and torsion test. The vertical displacement sensor 6 can measure the displacement of the vertical lifting platform 52 in the vertical direction in cooperation with the scale of the vertical guide rail 54.

[0032] Further, as shown in Figure 1 and Figure 3 As shown, in some embodiments, the vertical lifting drive mechanism 53 includes a vertical lifting base 531. The vertical lifting base 531 is installed at the bottom of the vertical lifting platform 52. The vertical lifting base 531 is provided with a lifting platform drive motor 532 and a lifter speed reducer 533. The lifting platform drive motor 532 is connected to the lifter speed reducer 533. The lifter speed reducer 533 is connected to a lifting screw 534. The lifting screw 534 is fixed to the vertical lifting platform 52 through a lifting platform flange 535. The lifting platform drive motor 532 is configured to drive the vertical lifting platform 52 to lift through the lifting screw 534.

[0033] In this embodiment, the vertical lifting base 531 is fixed to the bottom plate 1. One end of the lifting screw 534 close to the vertical lifting platform 52 is fixedly provided with a lifting platform flange 535. The lifting platform flange 535 is bolted to the vertical lifting platform 52. The lifter reducer 533 adjusts the rotation speed of the output shaft of the lifting platform driving motor 532. The lifting platform driving motor 532 drives the lifting screw 534 to lift, so that the vertical lifting platform 52 moves up and down.

[0034] Further, referring to Figure 4 and Figure 5 As shown, in some embodiments, the rotary support mechanism 7 includes a fixed ring 71, a moving ring 72 and a rotary driving motor 73. The fixed ring 71 is fixed to the vertical lifting mechanism 5. The moving ring 72 is sleeved outside the fixed ring 71. The moving ring 72 is provided with a rotary platform 74. The rotary driving motor 73 is connected to the moving ring 72 through an output shaft. The rotary driving motor 73 is configured to drive the rotary platform 74 to rotate through the moving ring 72. The output shaft is provided with a rotation angle sensor 8.

[0035] In this embodiment, the fixed ring 71 is fixed to the vertical lifting platform 52. The gear of the output shaft of the rotary driving motor 73 meshes with the gear of the moving ring 72. The rotary driving motor 73 drives the moving ring 72 to rotate, so that the rotary platform 74 rotates and bears axial force, radial force and tipping moment, so that the tire static stiffness test bench meets the loading requirements of the wheel 4 in the torsion test. The rotation angle sensor 8 can measure the rotation angle of the rotary platform 74. Exemplarily, when the rotary platform 74 switches between the two states of 0° and 90°, the wheel 4 can switch between the lateral loading test and the longitudinal loading test.

[0036] Further, referring to Figure 5 As shown, in some embodiments, the side shift mechanism 9 includes at least two side shift linear guide rails 91. At least two side shift linear guide rails 91 are installed with a side shift platform 92. A lead screw nut assembly 93 and a side shift driving motor 94 are installed between at least two side shift linear guide rails 91. The lead screw nut assembly 93 is connected to the side shift driving motor 94, and the lead screw nut assembly 93 is connected to the side shift platform 92. The side shift driving motor 94 is configured to drive the side shift platform 92 to move along the side shift linear guide rail 91 through the lead screw nut assembly 93. The side shift platform 92 is installed with a side shift displacement sensor 10.

[0037] In this embodiment, at least two of the lateral displacement linear guide rails 91 are installed on the rotating platform 74, the lateral displacement platform 92 is slidably disposed on at least two of the lateral displacement linear guide rails 91. The lateral displacement linear guide rails 91 have the characteristics of high precision, high load capacity and low friction. The lateral displacement driving motor 94 drives the lateral displacement platform 92 to move along the lateral displacement linear guide rails 91 through the lead screw nut assembly 93, so as to adjust the tire static stiffness test bench to meet the loading requirements of the wheel 4 in the lateral loading test, longitudinal loading test and torsion test. The lateral displacement sensor 10 can measure the displacement of the lateral displacement platform 92 moving along the lateral displacement linear guide rails 91.

[0038] Further, referring to Figure 5 As shown, in some embodiments, the lead screw nut assembly 93 includes a lateral displacement lead screw 931 and a nut assembly. The lateral displacement lead screw 931 is threadedly connected to the nut assembly. The lateral displacement lead screw 931 is connected to the lateral displacement driving motor 94. The nut assembly is fixed to the lateral displacement platform 92. When the lateral displacement driving motor 94 drives the lateral displacement lead screw 931 to rotate, the nut assembly moves along the axis of the lateral displacement lead screw 931 and drives the lateral displacement platform 92 to move.

[0039] In this embodiment, the axis of the lateral displacement lead screw 931 is parallel to the extending direction of the lateral displacement linear guide rails 91. The lateral displacement driving motor 94 drives the lateral displacement lead screw 931 to rotate, so that the lateral displacement platform 92 moves along the axial direction of the lateral displacement lead screw 931, so as to adjust the lateral or longitudinal position of the lateral displacement platform 92, so that the tire static stiffness test bench meets the loading requirements of the wheel 4 in the lateral loading test and longitudinal loading test.

[0040] Further, referring to Figure 5 As shown, in some embodiments, the camber mechanism 11 includes a camber platform 111. One end of the camber platform 111 is connected to the lateral displacement mechanism 9 through a hinge support 112. The other end of the camber platform 111 is connected to the rotary support mechanism 7 through a camber lifting bracket 113. The camber lifting bracket 113 is connected with a camber driving motor 114. The camber driving motor 114 is configured to drive one end of the camber platform 111 to lift. The camber angle sensor 12 is disposed at the connection between the camber platform 111 and the lateral displacement mechanism 9.

[0041] In this embodiment, one end of the camber platform 111 is connected to the side shift platform 92 through the hinge support 112, and the other end of the camber platform 111 is connected to the rotating platform 74 through the camber lifting bracket 113. The camber drive motor 114 drives the camber lifting bracket 113 to rise and fall, so that one end of the camber platform 111 rises and falls. The hinge axis of the camber platform 111 and the side shift platform 92 is provided with the camber angle sensor 12, and the camber angle sensor 12 can measure the inclination angle of the camber platform 111. The inclination angle of the platform 111 can be set to be greater than 45° to simulate the situation where the tire contacts an extremely inclined road surface. Exemplarily, when the camber angle of the wheel 4 in the loading test is 6°, the inclination angle of the camber platform 111 is adjusted to 6°, and the wheel 4 contacts the camber platform 111 at a camber angle of 6°. When the camber angle of the wheel 4 in the loading test is -6°, the inclination angle of the camber platform 111 is adjusted to 6° and the rotating platform 74 is rotated 180°, and the wheel 4 contacts the camber platform 111 at a camber angle of -6°.

[0042] Further, see Figure 5 As shown, in some embodiments, the camber drive motor 114 is threadedly connected to the camber lifting bracket 113 through a camber screw. When the camber drive motor 114 drives the camber screw to rotate, the camber screw drives the camber lifting bracket 113 to rise and fall, and drives one end of the camber platform 111 to rise and fall.

[0043] In this embodiment, the camber driving motor 114 drives the camber screw to rotate, so that the camber lifting bracket 113 is lifted and lowered, and drives one end of the camber platform 111 to be lifted and lowered.

[0044] Further, see Figure 5 As shown, in some embodiments, a wedge block 115 is provided between the camber platform 111 and the lateral shift mechanism 9 , and a protrusion 116 is provided on the camber platform 111 .

[0045] In this embodiment, the wedge block 115 is arranged between the camber platform 111 and the lateral displacement mechanism 9. The wedge block 115 serves as an auxiliary support to improve the stability of the camber platform 111 and ensure that the camber platform 111 can still be used normally under high load conditions. The angle of the wedge block 115 is adjusted according to the needs of the loading test. The upper surface of the camber platform 111 can be installed with road materials of different materials to simulate the actual situation of the tire contacting the ground. The camber platform 111 can be installed with various bumps 116 to simulate the loading test on the bumps 116.

[0046] Further, see Figure 1And Figure 2 As shown, in some embodiments, the tire mounting mechanism 3 includes an inner shaft 31 fixedly provided on the tire mounting base 2. An outer hollow shaft 32 is sleeved on the inner shaft 31. A wheel hub mounting seat 33 is provided on one side of the outer hollow shaft 32 away from the tire mounting base 2. The wheel hub mounting seat 33 is used for mounting the wheel 4. The tire mounting base 2 is provided with a plurality of first mounting holes 21, and the outer hollow shaft 32 is provided with a plurality of second mounting holes 321. The outer hollow shaft 32 and the tire mounting base 2 are fixed by a fastener passing through the second mounting holes 321 and the first mounting holes 21.

[0047] In this embodiment, a plurality of bearings 34 are sleeved on the inner shaft 31. The inner shaft 31 is connected to the outer hollow shaft 32 through the plurality of bearings 34. The outer hollow shaft 32 and the tire mounting base 2 are detachably assembled. The outer hollow shaft 32 can rotate relative to the tire mounting base 2, so as to drive the wheel 4 to rotate to calibrate the initial position of the six-component force sensor 13. When the outer hollow shaft 32 is fixed to the tire mounting base 2, the wheel 4 is in a braking state, and the tire static stiffness test bench performs a loading test. The fastener can be set as a positioning pin. The outer hollow shaft 32 and the tire mounting base 2 are fixed by the positioning pin passing through the second mounting holes 321 and the first mounting holes 21.

[0048] When performing the vertical stiffness test, the outer hollow shaft 32 is used to fix the wheel 4. The camber platform 111 is adjusted so that the axis of the wheel 4 is parallel to the extension direction of the camber platform 111, and the tire static stiffness test bench is parallel to the ground. The center of the tire static stiffness test bench is aligned with the contact center of the wheel 4. The lifting platform drive motor 532 drives the lifting screw 534 to rise, so that the vertical lifting platform 52, the rotary support mechanism 7, the side shift mechanism 9 and the camber mechanism 11 move upward as a whole, and a vertical loading test is performed on the wheel 4. The six-component force sensor 13 is used to measure the vertical load received by the wheel 4, and the vertical displacement sensor 6 is used to measure the vertical deformation displacement of the wheel 4, so as to obtain the vertical stiffness of the wheel 4.

[0049] When conducting the lateral stiffness test, the wheel 4 is fixed by the outer hollow shaft 32. The camber platform 111 is adjusted to make the axis of the wheel 4 parallel to the extension direction of the camber platform 111, and the tire static stiffness test bench is made parallel to the ground. The center of the tire static stiffness test bench is aligned with the contact center of the wheel. The rotation support mechanism 7 is adjusted to make the extension direction of the lateral displacement linear guide 91 parallel to the axis of the wheel 4. The lifting platform drive motor 532 drives the lifting screw 534 to rise, so that the vertical lifting platform 52, the rotation support mechanism 7, the lateral displacement mechanism 9 and the camber mechanism 11 move upward as a whole until the wheel 4 bears a vertical load of half the rated value. The vertical deformation displacement of the wheel 4 is measured by the vertical displacement sensor 6. Then, the lateral displacement drive motor 94 drives the lateral displacement platform 92 to move outward along the axis of the wheel 4, and a lateral load test is carried out on the wheel 4. The lateral load received by the wheel 4 is measured by the six-component force sensor 13, and the lateral deformation displacement of the wheel 4 is measured by the lateral displacement sensor 10, so as to obtain the lateral stiffness of the wheel 4. The lateral displacement of the lateral displacement platform 92 is twice the vertical deformation displacement of the wheel 4.

[0050] When conducting the torsional stiffness test, the wheel 4 is fixed by the outer hollow shaft 32. The camber platform 111 is adjusted to make the axis of the wheel 4 parallel to the extension direction of the camber platform 111, and the tire static stiffness test bench is made parallel to the ground. The center of the tire static stiffness test bench is aligned with the contact center of the wheel 4. The lifting platform drive motor 532 drives the lifting screw 534 to rise, so that the vertical lifting platform 52, the rotation support mechanism 7, the lateral displacement mechanism 9 and the camber mechanism 11 move upward as a whole until the wheel 4 bears a vertical load of half the rated value. The rotation drive motor 73 drives the rotation platform 74 to rotate, so as to apply a self-aligning moment to the wheel 4. The rotation platform 74 rotates clockwise to a certain angle, and then rotates counterclockwise to a certain negative angle, repeating several times. The self-aligning moment received by the wheel 4 is measured by the six-component force sensor 13, and the lateral displacement angle of the wheel 4 is measured by the rotation angle sensor 8, so as to obtain the torsional stiffness of the wheel 4.

[0051] When conducting the static stiffness test on the wheel 4 under the camber angle or bump state, first adjust the camber angle of the camber platform 111 through the camber lifting bracket 113, or set the bump 116 on the camber platform 111, and then complete the static stiffness test of the wheel 4 according to the above test method.

[0052] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0053] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0054] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A tire static stiffness test bench, characterized in that: It includes: A base plate (1), the base plate (1) being mounted with a tire mounting base (2), the tire mounting base (2) being provided with a tire mounting mechanism (3), the tire mounting mechanism (3) being used for mounting a wheel (4); A vertical lifting mechanism (5), the vertical lifting mechanism (5) is installed on one side of the base, and the vertical lifting mechanism (5) is located below the tire mounting mechanism (3), and the vertical lifting mechanism (5) is provided with a vertical displacement sensor (6); A rotating support mechanism (7), the rotating support mechanism (7) being mounted on the vertical lifting mechanism (5), and the rotating support mechanism (7) being provided with a rotation angle sensor (8); A lateral shift mechanism (9), wherein the lateral shift mechanism (9) is mounted on the rotating support mechanism (7), and the lateral shift mechanism (9) is provided with a lateral shift displacement sensor (10); A camber mechanism (11), the camber mechanism (11) being mounted on the side shift mechanism (9), the camber mechanism (11) being provided with a camber angle sensor (12); The tire static stiffness test bench also includes a six-component force sensor (13) for being mounted on the wheel hub of the wheel (4).

2. The tire static stiffness test bench according to claim 1, characterized in that: The vertical lifting mechanism (5) comprises a plurality of guide columns (51) fixed to the bottom plate (1), the plurality of guide columns (51) being sleeved with a vertical lifting platform (52), a vertical lifting driving mechanism (53) being provided at the bottom of the vertical lifting platform (52), and the vertical lifting driving mechanism (53) being configured to drive the vertical lifting platform (52) to move up and down; The tire mounting base (2) is provided with at least two vertical guide rails (54), each of the vertical guide rails (54) is slidably provided with a vertical slider (55), the vertical slider (55) is fixed to the vertical lifting platform (52), and the vertical slider (55) is fixed to the vertical displacement sensor (6).

3. The tire static stiffness test bench according to claim 2, characterized in that: The vertical lifting drive mechanism (53) comprises a vertical lifting base (531), wherein the vertical lifting base (531) is installed at the bottom of the vertical lifting platform (52), and the vertical lifting base (531) is provided with a lifting platform driving motor (532) and a lift reducer (533), wherein the lifting platform driving motor (532) is connected to the lift reducer (533), and the lift reducer (533) is connected to a lifting screw (534), wherein the lifting screw (534) is fixed to the vertical lifting platform (52) via a lifting platform flange (535), and the lifting platform driving motor (532) is configured to drive the vertical lifting platform (52) to rise and fall via the lifting screw (534).

4. The tire static stiffness test bench according to claim 1, characterized in that: The rotating support mechanism (7) comprises a fixed ring (71), a moving ring (72) and a rotating drive motor (73); the fixed ring (71) is fixedly mounted on the vertical lifting mechanism (5); the moving ring (72) is sleeved outside the fixed ring (71); the moving ring (72) is provided with a rotating platform (74); the rotating drive motor (73) is connected to the moving ring (72) via an output shaft; the rotating drive motor (73) is configured to drive the rotating platform (74) to rotate via the moving ring (72); and the output shaft is provided with the rotating angle sensor (8).

5. The tire static stiffness test bench according to claim 1, characterized in that: The side shift mechanism (9) comprises at least two side shift linear guide rails (91), at least two of the side shift linear guide rails (91) are equipped with a side shift platform (92), a lead screw nut assembly (93) and a side shift drive motor (94) are installed between at least two of the side shift linear guide rails (91), the lead screw nut assembly (93) is connected to the side shift drive motor (94), and the lead screw nut assembly (93) is connected to the side shift platform (92), the side shift drive motor (94) is configured to drive the side shift platform (92) to move along the side shift linear guide rail (91) through the lead screw nut assembly (93), and the side shift platform (92) is equipped with the side shift displacement sensor (10).

6. The tire static stiffness test bench according to claim 5, characterized in that: The screw nut assembly (93) comprises a side-shift screw (931) and a nut assembly, the side-shift screw (931) being threadedly connected to the nut assembly, the side-shift screw (931) being connected to the side-shift drive motor (94), and the nut assembly being fixed to the side-shift platform (92), and when the side-shift drive motor (94) drives the side-shift screw (931) to rotate, the nut assembly moves along the axis of the side-shift screw (931) and drives the side-shift platform (92) to move.

7. The tire static stiffness test bench according to claim 1, characterized in that: The camber mechanism (11) comprises a camber platform (111), one end of the camber platform (111) is connected to the side shift mechanism (9) via a hinged support (112), the other end of the camber platform (111) is connected to the rotation support mechanism (7) via a camber lifting bracket (113), the camber lifting bracket (113) is connected to a camber drive motor (114), the camber drive motor (114) is configured to drive one end of the camber platform (111) to rise and fall, and the camber angle sensor (12) is provided at the connection between the camber platform (111) and the side shift mechanism (9).

8. The tire static stiffness test bench according to claim 7, characterized in that: The camber drive motor (114) is threadedly connected to the camber lifting bracket (113) via a camber screw. When the camber drive motor (114) drives the camber screw to rotate, the camber screw drives the camber lifting bracket (113) to rise and fall, and drives one end of the camber platform (111) to rise and fall.

9. The tire static stiffness test bench according to claim 7, characterized in that: A wedge block (115) is provided between the camber platform (111) and the side shift mechanism (9), and a convex block (116) is provided on the camber platform (111).

10. The tire static stiffness test bench according to claim 1, characterized in that: The tire mounting mechanism (3) comprises an inner shaft (31), the inner shaft (31) being fixedly mounted on the tire mounting base (2), the inner shaft (31) being sleeved with an outer hollow shaft (32), a wheel hub mounting seat (33) being provided on a side of the outer hollow shaft (32) away from the tire mounting base (2), and the wheel hub mounting seat (33) being used for mounting a wheel (4); The tire mounting base (2) is provided with a plurality of first mounting holes (21), the outer hollow shaft (32) is provided with a plurality of second mounting holes (321), and the outer hollow shaft (32) and the tire mounting base (2) are fixed by fasteners passing through the second mounting holes (321) and the first mounting holes (21).

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