CN112881037A

CN112881037A - Device and method for testing force transfer function of tire excited vibration

Info

Publication number: CN112881037A
Application number: CN202110069692.5A
Authority: CN
Inventors: 王季鑫; 刘琦; 马雪婷; 黄帅; 李伟民
Original assignee: Dongfeng Motor Group Co Ltd
Current assignee: Dongfeng Motor Group Co Ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-06-01
Anticipated expiration: 2041-01-19
Also published as: CN112881037B

Abstract

The invention relates to a device and a method for testing a force transfer function of a tire under excitation. The device comprises a test cabinet body, a lifting vibration excitation mechanism, a horizontal hammering vibration excitation mechanism and a vertical hammering vibration excitation mechanism; the lifting excitation mechanism comprises a lifting driving structure and a swinging support structure which are arranged on the bottom wall of the test cabinet body, and a swinging platform which is arranged on the tops of the lifting driving structure and the swinging support structure; the horizontal hammering and vibration exciting mechanism comprises a tire limiting structure and a horizontal vibration exciting driving structure which are respectively arranged on the test cabinet body, a first crank block structure connected with the horizontal vibration exciting driving structure, and a horizontal vibration hammer arranged at the end part of the first crank block structure; the vertical hammering vibration excitation mechanism comprises a vertical vibration excitation driving structure arranged at the top of the test cabinet body, a second crank block structure connected with the vertical vibration excitation driving structure, and a vertical vibration excitation hammer arranged at the end part of the second crank block structure. The invention can solve the problems of large error, unrepeatability and low testing efficiency when the tire is tested by manually knocking the wheel.

Description

Device and method for testing force transfer function of tire excited vibration

Technical Field

The invention relates to the technical field of automobile tire testing, in particular to a device and a method for testing a force transfer function of a tire under excitation test.

Background

With increasingly strict requirements of users on driving experience, evaluation on the performance of the NVH (Noise, Vibration and Harshness) of the whole automobile is gradually brought into a hard index by each large automobile host factory, and the NVH performance of tires is regarded as an important ring influencing the NVH performance of the whole automobile, so that more and more attention is paid. Since the force transfer function of a tire can be used for characterizing part of the NVH performance of the tire, experimental tests are developed on the force transfer function of the tire, and test data are analyzed, so that the method is an important means for judging the NVH performance of the tire.

The general test method under the prior art condition is as follows: after a tester arranges a vibration sensor on a tire tread at a selected point, the tester adopts a mode of knocking a wheel by a hand-held force hammer to excite the tire to generate vibration, and then force transfer function information of the tire is obtained by reading signals collected by the vibration sensor. In the test method in the prior art, uncontrollable factors are more. When the wheel is knocked by manually holding the force hammer, the exciting force is limited, the integral vibration of the tire is difficult to cause, the force input and the direction are unstable, the test error is large, and the repeatability of the experiment cannot be ensured; on the other hand, the test needs two persons to cooperate, and the test efficiency is low.

Disclosure of Invention

The invention provides a device and a method for testing a force transfer function of a tire under shock excitation, which aim to solve the problems of large error, unrepeatability and low testing efficiency in the process of manually knocking the wheel to test the tire in the related art.

The invention provides a device for testing a force transfer function of a tire under excitation, which comprises:

a test cabinet body;

the lifting excitation mechanism comprises a lifting driving structure and a swinging support structure which are arranged on the bottom wall of the test cabinet body side by side, and a swinging platform arranged on the tops of the lifting driving structure and the swinging support structure;

the horizontal hammering and vibration exciting mechanism comprises a tire limiting structure arranged at the upper part of the testing cabinet body, a tire supporting structure arranged at the bottom wall of the testing cabinet body, a tire positioning structure arranged on the side wall of the testing cabinet body, a horizontal vibration exciting driving structure arranged at the top part of the testing cabinet body, a first crank block structure connected with the horizontal vibration exciting driving structure, and a horizontal vibration exciting hammer arranged at the end part of the first crank block structure, wherein the horizontal vibration exciting hammer is correspondingly matched with the tire limiting structure or the tire supporting structure and the tire positioning structure; and the number of the first and second groups,

perpendicular hammering excitation mechanism, include tire bearing structure with tire location structure locates the perpendicular excitation drive structure at the top of the test cabinet body, with the second slider-crank structure that perpendicular excitation drive structure connects, and locate the tip of second slider-crank structure and with tire location structure with tire bearing structure corresponds the complex perpendicular excitation hammer.

In some embodiments, the horizontal hammering vibration excitation mechanism includes a first shaft seat structure disposed on the test cabinet, a horizontal vibration excitation rotating shaft disposed on the first shaft seat structure and connected to the horizontal vibration excitation driving structure, a first push ring structure disposed on the horizontal vibration excitation rotating shaft, and a first gear transmission structure connected to the first slider-crank structure, wherein the first push ring structure is engaged with the first gear transmission structure and is used for being combined with or separated from the first gear transmission structure under an external force.

In some embodiments, the first gear transmission structure includes a first transmission gear movably sleeved on the horizontal excitation rotating shaft and connected with the first shaft base structure, and a first driven gear meshed with the first transmission gear and rotatably arranged on the test cabinet body, and the first driven gear is connected and matched with the first slider-crank structure;

the first push-pull ring structure comprises a first push-pull rod and a first bearing type push-pull ring, the first push-pull rod is arranged on the test cabinet body in a sliding mode, the first bearing type push-pull ring is connected with the horizontal excitation rotating shaft in a sliding mode in a key connection mode, the first bearing type push-pull ring is matched with the first transmission gear, and the first push-pull rod is used for driving the first bearing type push-pull ring to move under the action of external force in a telescopic mode so that the first bearing type push-pull ring is combined with or separated from the first transmission gear.

In some embodiments, the first bearing type push-pull ring includes a first push-pull outer ring connected to the first push-pull rod, a first push-pull inner ring rotatably connected to the first push-pull outer ring, and a plurality of first balls annularly disposed between the first push-pull inner ring and the first push-pull outer ring, the first push-pull inner ring is slidably disposed on the horizontally excited rotating shaft by a key connection, and the first push-pull inner ring is engaged with the first transmission gear.

In some embodiments, the first push-pull inner ring comprises a first inner ring main body connected with the horizontal excitation rotating shaft in a sliding key manner, a first conical ring structure protruding from one end of the first inner ring main body along the axial direction of the first inner ring main body, and a first snap spring structure protruding from the first conical ring structure along the radial direction of the first conical ring structure;

one end of the first transmission gear is axially provided with a first conical groove correspondingly matched with the first conical ring structure, and a first clamping groove structure correspondingly matched with the first clamping spring structure is arranged on the side wall surface of the first conical groove.

In some embodiments, the first crank-slider structure includes a first crank disc connected to the first gear transmission structure, a first crank link hinged to an edge of the first crank disc, and a second crank link hinged to the first crank link, the second crank link is horizontally slidably disposed on the test cabinet, and the horizontal vibration exciter is disposed at an end of the second crank link.

In some embodiments, the horizontal excitation driving structure comprises a horizontal driving motor arranged on the test cabinet body, and a horizontal pulley transmission structure connected with an output shaft of the horizontal driving motor, and the first slider-crank structure is connected with the horizontal pulley transmission structure;

the lifting driving structure comprises a lifting driving oil cylinder hinged to the bottom wall of the test cabinet body, and the lifting driving oil cylinder is hinged to one side of the bottom of the swing platform; the swing support structure comprises a fixed seat fixedly arranged on the bottom wall of the test cabinet body and a cross shaft structure rotatably arranged at the top of the fixed seat, and the cross shaft structure is rotatably arranged on the other side of the bottom of the swing platform.

In some embodiments, the tire positioning structure comprises a coupler connected to a sidewall of the testing cabinet, an axle connected to the coupler and used for penetrating a wheel to be tested, and a locking disc connected to an end of the axle;

the tire supporting structure comprises a supporting telescopic driving structure hinged to the bottom wall of the testing cabinet body and a lifting supporting platform hinged to the top of the supporting telescopic driving structure.

In some embodiments, the vertical hammering vibration excitation mechanism includes a second shaft seat structure disposed on the test cabinet, a vertical vibration excitation rotating shaft penetrating through the second shaft seat structure and connected to the vertical vibration excitation driving structure, a second push ring structure disposed on the vertical vibration excitation rotating shaft, and a second gear transmission structure connected to the second slider-crank structure, and the second push ring structure is engaged with the second gear transmission structure and is used for being combined with or separated from the second gear transmission structure under an external force.

In a second aspect, the present invention provides a method for testing a force transfer function of a tire subjected to shock excitation test, including the following steps:

controlling a lifting excitation mechanism to detect the NVH uniformity of the tire of the wheel to be detected;

controlling a horizontal hammering excitation mechanism to detect the axial and lateral force transfer functions of the tire of the wheel to be detected;

and controlling the vertical hammering excitation mechanism to detect the radial force transfer function of the tire of the wheel to be detected.

The technical scheme provided by the invention has the beneficial effects that:

the embodiment of the invention provides a device for testing a force transfer function of a tire under the action of vibration excitation, wherein a lifting vibration excitation mechanism is arranged, so that a wheel to be tested can be placed on a swing platform, and the swing platform is driven to swing through a lifting driving structure and a swing support structure, so that the NVH uniformity of the tire of the wheel to be tested can be detected; the axial and lateral force transfer functions of the tire of the wheel to be detected can be detected through the horizontal hammering excitation mechanism; through the vertical hammering vibration excitation mechanism, the radial force transfer function of the tire of the wheel to be detected can be detected. In the process of detecting the wheel to be tested, the tire is not required to be hammered manually, but the tire is automatically hammered by the horizontal hammering excitation mechanism and the vertical hammering excitation mechanism, the size of the excitation input force is stable, the size and the direction error of the excitation force in manual testing can be avoided, and a more real and accurate test result can be obtained; moreover, a plurality of test contents can be completed by a single person, so that the test efficiency can be improved, and the labor cost can be saved; the NVH uniformity problem of the tire is detected through testing, and the defect of insufficient NVH uniformity caused by the problems of the structure and the material of the tire can be evaluated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an exploded view of an apparatus for testing a force transfer function of a tire under excitation according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a lifting excitation mechanism of a device for testing a force transfer function of a tire under excitation according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a horizontal hammering excitation mechanism of an apparatus for exciting a test force transfer function of a tire according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a horizontal hammering excitation mechanism of an apparatus for subjecting a tire to an excitation test force transfer function according to another embodiment of the present invention;

FIG. 5 is a schematic partial enlarged structural view of a first push ring structure part of a horizontal hammering excitation mechanism of a device for testing a force transfer function of a tire under excitation according to an embodiment of the invention;

FIG. 6 is a schematic cross-sectional structural diagram of a first push ring structure of a horizontal hammering excitation mechanism of a device for testing a force transfer function of a tire under excitation according to an embodiment of the invention;

fig. 7 is a schematic partial enlarged structural view of a first gear transmission structure and a first pedestal structure of a horizontal hammering vibration excitation mechanism of a device for testing a force transfer function of a tire under vibration excitation according to an embodiment of the invention;

FIG. 8 is a partially enlarged structural view of a first slider-crank structure of a horizontal hammering excitation mechanism of the device for testing the force transfer function of the tire under excitation according to the embodiment of the invention;

FIG. 9 is a schematic perspective view of a vertical hammering excitation mechanism of a device for testing a force transfer function of a tire under excitation according to an embodiment of the present invention;

fig. 10 is a schematic perspective view of a wheel to be tested provided with a vibration sensor in an apparatus for testing a force transfer function of a tire under excitation according to an embodiment of the present invention.

In the figure: 10. a wheel to be tested; 12. a hub; 14. a tire; 20. a vibration sensor; 100. a test cabinet body; 200. a lifting excitation mechanism; 210. a swing support structure; 212. a fixed seat; 214. a cross-axle structure; 216. a third hinge support; 220. a lifting drive structure; 222. a support base plate; 224. a first hinge support; 226. a lifting drive oil cylinder; 228. a second hinge support; 230. a swing platform; 300. a horizontal excitation drive structure; 310. a horizontal driving motor; 320. a horizontal pulley drive structure; 330. a horizontal excitation rotating shaft; 340. a first axle seat structure; 342. a first support base; 344. a first support bearing structure; 3442. a first bearing outer race; 3444. a first bearing inner race; 346. a first locking pin; 350. a first gear transmission structure; 352. a first drive gear; 354. a first driven gear; 360. a first push ring structure; 362. a first push-pull rod; 364. a first push-pull outer ring; 366. a first ball bearing; 368. a first push-pull inner ring; 3682. a first cone ring structure; 3684. a first clamp spring structure; 370. a first slider-crank arrangement; 372. a first crank disk; 374. a first crank link; 376. a second crank connecting rod; 380. a horizontal vibration exciter; 400. a vertical hammering excitation mechanism; 410. a vertical drive motor; 420. a vertical belt wheel transmission structure; 430. a vertical excitation rotating shaft; 440. a second shaft mount structure; 450. a second gear transmission structure; 452. a second transmission gear; 454. a second driven gear; 460. a second push ring structure; 470. a second slider-crank arrangement; 472. a second crank disk; 474. a third crank connecting rod; 476. a fourth crank link; 480. a vertical vibration exciter; 500. a tire limiting structure; 510. a lifting lug structure; 520. a lifting rope; 600. a tire support structure; 610. a limiting bottom plate; 620. supporting the telescopic driving oil cylinder; 630. lifting the support platform; 700. a tire positioning structure; 710. a coupling; 720. a wheel axle; 730. and (5) locking the disc.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1, the device for testing the transfer function of the tire under the excitation of the vibration includes a testing cabinet 100, a lifting vibration excitation mechanism 200 disposed in the testing cabinet 100, and a horizontal vibration excitation mechanism 300 and a vertical hammering vibration excitation mechanism 400 disposed in the testing cabinet 100. By arranging the lifting excitation mechanism 200, the NVH uniformity of the tire 14 of the wheel 10 to be detected can be detected; the axial and lateral force transfer functions of the tire 14 of the wheel 10 to be tested can be detected through the horizontal hammering excitation mechanism 300; the radial force transfer function of the tire 14 of the wheel 10 to be measured can be detected by the vertical hammering excitation mechanism 400. In the process of detecting the tire 14 of the wheel 10 to be detected, the tire is not required to be hammered manually, but the tire is automatically hammered by the horizontal hammering excitation mechanism 3000 and the vertical hammering excitation mechanism 4000, the vibration excitation input force is stable, errors in manual testing can be avoided, the testing result is more accurate and reliable, the testing efficiency can be improved, the labor cost is saved, and the NVH uniformity problem of the tire can be detected.

Specifically, as shown in fig. 1 to 2, the lifting excitation mechanism 200 may include a lifting driving structure 220 and a swing support structure 210 disposed at the bottom of the testing cabinet 100 side by side, and a swing platform 230 disposed at the top of the lifting driving structure 220 and the swing support structure 210. By arranging the lifting excitation mechanism 200, the wheel 10 to be tested can be placed on the horizontally arranged swing platform 230, and the swing platform 230 is driven to swing through the lifting driving structure 22 and the swing support structure 2100, so as to detect the NVH uniformity of the tire 14 of the wheel 10 to be tested. The function realization of each experiment is completed according to certain experimental steps by relying on different mechanisms and components and following corresponding testing methods. Particularly, before testing the axial force transfer function, the lateral force transfer function and the radial force transfer function of the tire, NVH uniformity detection operation of the tire needs to be carried out, NVH uniformity of a tested piece used for testing the force transfer function at the later stage is guaranteed to reach the standard, and reliability of test data is guaranteed.

Further, the lifting driving structure 220 may include a lifting driving cylinder 226 hinged to the bottom wall of the testing cabinet 100, and the lifting driving cylinder 226 is hinged to one side of the bottom of the swing platform 230. One side of the swing platform 230 can be lifted or lowered by the lifting driving cylinder 226, so that the swing platform 230 swings around the swing support structure 210 on the other side, thereby swinging the wheel 10 to be measured placed on the swing platform 230. Moreover, the lifting driving structure 220 may include a plurality of lifting driving cylinders 226 disposed side by side on the bottom wall of the testing cabinet 100, and may drive the swing platform 230 to lift from a plurality of positions, so that the swing positions of the swing platform 2300 and the tires are more, the swing is more natural, and the testing effect is better. In this embodiment, the lifting driving structure 220 may include two lifting driving cylinders 226 arranged side by side, and both the two lifting driving cylinders 226 can be lifted independently. Furthermore, two lift drive cylinders 226 are disposed longitudinally at the bottom of the swing platform 230, while the lift drive structure 220 and the swing support structure 210 are disposed laterally at the bottom of the swing platform 230.

Furthermore, the lifting driving structure 220 may further include a supporting base plate 222 fixed on the bottom wall of the testing cabinet 100, a first hinge support 224 disposed at the top of the supporting base plate 222, and a second hinge support 228 disposed at the bottom of the swing platform 230. The main body of the lift driving cylinder 226 is hinged to the first hinge support 224, and the piston rod of the lift driving cylinder 226 is hinged to the second hinge support 228. Further, the first hinge support 224 and the second hinge support 228 are hinged in a direction perpendicular to each other, so that the lift driving cylinder 226 can rotate in two directions perpendicular to each other, thereby swinging the swing platform 230 in two directions perpendicular to each other. In this embodiment, the lift driving cylinder 226 may be an electric hydraulic cylinder.

In addition, the swing support structure 210 may include a fixing base 212 fixed to the bottom wall of the testing cabinet 100, and a cross-axle structure 214 rotatably disposed on the top of the fixing base 212, wherein the cross-axle structure 214 is rotatably disposed on the other side of the bottom of the swing platform 230. The swing platform 230 and the fixing base 212 are connected through the cross axle structure 214, so that the swing platform 230 can swing around the cross axle structure 214 in different directions under the lifting driving action of the lifting driving oil cylinder 226, and the swing platform 230 has certain stability and good swinging capacity. The cross axle structure 214 includes an axle seat disposed on the top of the fixing seat 212, a first rotating shaft rotatably disposed on the axle seat, and a second rotating shaft rotatably disposed on the first rotating shaft, and the second rotating shaft is perpendicular to the first rotating shaft; furthermore, a third hinge support 216 is disposed at the bottom of the swing platform 230, and the second rotating shaft is rotatably disposed on the third hinge support 216. Through the arrangement of the cross-axle structure 214, the two sides of the swing platform 230 can be kept consistent, that is, when one side of the swing platform 230 swings under the driving of the plurality of lifting driving cylinders 226, the other side of the swing platform 230 can swing correspondingly under the action of the cross-axle structure 214.

In addition, in other embodiments, the lifting excitation mechanism 200 may include a lifting driving structure 220 disposed at the bottom of the testing cabinet 100, and a swing platform 230 disposed at the top of the lifting driving structure 220. And the lifting driving structure 2200 may include a plurality of lifting driving cylinders hinged between the bottom wall of the testing cabinet 100 and the swing platform 230. In this embodiment, an independent lift driving cylinder may be disposed around the swing platform 230, so as to swing the swing platform 230 from all around.

As shown in fig. 3 to 4, the horizontal hammering vibration excitation mechanism 300 may include a tire limiting structure 500 disposed on the upper portion of the test cabinet 100, a tire supporting structure 600 disposed on the bottom wall of the test cabinet 100, a tire positioning structure 700 disposed on the side wall of the test cabinet 100, a horizontal vibration excitation driving structure disposed on the top of the test cabinet 100, a first crank block structure 370 connected to the horizontal vibration excitation driving structure, and a horizontal vibration hammer 380 disposed at the end of the first crank block structure 370, wherein the horizontal vibration hammer 380 is correspondingly engaged with the tire limiting structure 500 or the tire supporting structure 600 and the tire positioning structure 700. The first crank slider structure 370 can be driven to move by the horizontal excitation driving structure, so that the horizontal excitation hammer 380 connected with the first crank slider structure 370 is driven to translate in the horizontal direction, and the axial side surface or the circumferential side surface of the tire of the wheel 10 to be tested is hammered from the horizontal direction, so as to test the axial and lateral force transfer functions of the tire of the wheel 10 to be tested. When the axial force transfer function of the tire 14 of the wheel 10 to be tested is tested, the wheel 10 to be tested can be limited through the tire limiting structure 500, so that the wheel 10 to be tested is kept relatively stable in the testing process and cannot move up and down; when the lateral force transfer function of the tire of the wheel 10 to be tested is tested, the wheel 10 to be tested can be limited through the tire supporting structure 600 and the tire positioning structure 700, so that the wheel 10 to be tested keeps relatively stable in the testing process and does not move circumferentially.

Further, the tire limiting structure 500 may include a lifting lug structure 510 disposed on the upper portion of the testing cabinet 100, and a lifting rope 520 disposed on the lifting lug structure 510 in a penetrating manner, wherein the lifting rope 520 is disposed on the wheel 10 to be tested in a penetrating manner, so that the wheel 10 to be tested is suspended on the testing cabinet 100 and corresponds to the horizontal vibration exciter 380, and the suspended wheel 10 to be tested is conveniently hammered horizontally from the axial end face by the horizontal vibration exciter 380.

In addition, the tire support structure 600 may include a supporting telescopic driving structure hinged to the bottom wall of the test cabinet 100, and a lifting support platform 630 hinged to the top of the supporting telescopic driving structure. The lifting support platform 630 can be lifted by supporting the telescopic driving structure, so that the wheel 10 to be tested can be supported from the bottom of the wheel, and the support is stable and reliable. Moreover, the above-mentioned supporting telescopic driving structure may include a limiting bottom plate 610 disposed on the bottom wall of the testing cabinet 100, a limiting support disposed on the limiting bottom plate 610, a plurality of supporting telescopic driving cylinders 620 fixedly disposed on the limiting support, and a plurality of fourth hinged supports disposed at the bottom of the above-mentioned lifting supporting platform 630, wherein the plurality of supporting telescopic driving cylinders 620 are rotatably connected to the plurality of fourth hinged supports in a one-to-one correspondence. Through the telescopic driving oil cylinders 620 supported by a plurality of supports, the lifting supporting platform 630 can be lifted and supported from a plurality of positions, and the lifting supporting platform is stable and reliable. In this embodiment, two supporting telescopic driving cylinders 620 may be arranged side by side to support the lifting support platform 630.

Moreover, the swing platform 230 has a notch at the middle portion thereof, and the lifting support platform 630 is disposed at the notch, and the support extension driving structure is disposed between the swing support structure 210 and the lifting driving structure 220. The lifting support platform 630 can be lifted above the gap or lowered below the gap (i.e., lifted above the swing platform 230 or lowered below the swing platform 230) under the action of the plurality of supporting telescopic driving cylinders 620. In this way, the occupied space of the tire support structure 600 and the lift excitation mechanism 200 can be reduced, and the overall structure is more compact but does not interfere.

In addition, the tire positioning structure 700 may include a coupling 710 connected to a sidewall of the testing cabinet 100, an axle 720 connected to the coupling 710 and configured to pass through the wheel 10 to be tested, and a locking plate 730 connected to an end of the axle 720. The side wall of the testing cabinet 100 is provided with a connecting boss in a protruding manner, one end of the coupler 710 is connected with the connecting boss, the other end of the coupler 710 is connected with the wheel shaft 720, and the locking disc 730 is used for locking the wheel 10 to be tested which is arranged on the wheel shaft 720 in a penetrating manner, so that the wheel 10 cannot move axially in the testing process.

Moreover, the horizontal hammering vibration excitation mechanism 300 may include two first shaft base structures 340 disposed on the testing cabinet 100, a horizontal vibration excitation rotating shaft 330 disposed on the two first shaft base structures 340 and connected to the horizontal vibration excitation driving structure, a first push ring structure 360 disposed on the horizontal vibration excitation rotating shaft 330, and a first gear transmission structure 350 connected to the first slider-crank structure 370, wherein the first push ring structure 360 is engaged with the first gear transmission structure 350 and is used for being combined with or separated from the first gear transmission structure 350 under an external force. The horizontal excitation rotating shaft 330 may be rotatably supported by providing two first shaft seat structures 340 on the testing cabinet 100, and the horizontal excitation rotating shaft 330 may be driven to rotate by the horizontal excitation driving structure. By pushing and pulling the first push ring structure 360, the first gear transmission structure 350 is combined with the first push ring structure 360, so that the first gear transmission structure 350 is combined with the horizontal excitation rotating shaft 330, and the horizontal excitation rotating shaft 330 drives the first slider-crank structure 370 connected with the first gear transmission structure 350 to act, so that the horizontal excitation hammer 380 horizontally moves to horizontally hammer the wheel to be tested 10 which is suspended by a lifting rope or limited by the tire supporting structure 600 and the tire positioning structure; in addition, the first gear transmission structure 350 and the first push ring structure 360 can be separated by pushing and pulling the first push ring structure 360, so that the first gear transmission structure 350 is separated from the horizontal excitation rotating shaft 330, the horizontal excitation hammer 380 cannot be horizontally moved, and the wheel 10 to be measured cannot be horizontally hammered.

Further, the horizontal excitation driving structure includes a horizontal driving motor 310 disposed on the testing cabinet 100, and a horizontal pulley transmission structure 320 connected to an output shaft of the horizontal driving motor 310, and the first slider-crank structure 370 is connected to the horizontal pulley transmission structure 320 through a first gear transmission structure 350, a first push ring structure 360, and a horizontal excitation rotating shaft 330. Specifically, the horizontal excitation rotating shaft 330 is connected to the horizontal pulley transmission structure 320, and the horizontal driving motor 310 can drive the horizontal pulley transmission structure 320 to move, so as to drive the horizontal excitation rotating shaft 330 to rotate. Moreover, when the first gear transmission structure 350 is combined with the horizontal excitation rotating shaft 330 through the first push ring structure 360, the horizontal excitation rotating shaft 330 can drive the first gear transmission structure 350 to operate, so as to drive the first slider-crank structure 370 to operate. Moreover, the horizontal pulley transmission structure 320 may be replaced by a sprocket transmission structure or a gear transmission structure.

Moreover, the first gear transmission structure 350 may include a first transmission gear 352 movably sleeved on the horizontal excitation rotation shaft 330 and connected to the first shaft seat structure 340, and a first driven gear 354 engaged with the first transmission gear 352 and rotatably disposed on the testing cabinet 100, wherein the first driven gear 352 is connected to the first slider-crank structure 370. Moreover, the first push-pull ring structure 360 may include a first push-pull rod 362 slidably disposed on the testing cabinet 100, and a first bearing type push-pull ring connected to the first push-pull rod 362, the first bearing type push-pull ring is slidably connected to the horizontal excitation rotating shaft 330 in a key connection manner, and the first bearing type push-pull ring is matched with the first transmission gear 352, and the first push-pull rod 362 is configured to stretch under an external force to drive the first bearing type push-pull ring to move, so that the first bearing type push-pull ring is combined with or separated from the first transmission gear 352. That is, the first push-pull rod 362 of the first push-pull ring structure 360 is pushed and pulled, so that the first bearing-type push-pull ring slidably disposed on the horizontal excitation rotating shaft 330 in a key connection manner can be pushed, the first bearing-type push-pull ring is combined with the first transmission gear 352 of the first gear transmission structure 350, the horizontal excitation rotating shaft 330 can drive the first bearing-type push-pull ring to rotate together with the first transmission gear 352, and the first crank block structure 370 connected with the first driven gear 354 is driven to work to drive the horizontal excitation hammer 380 to move horizontally.

Further, as shown in fig. 5 to 8, the first bearing type push-pull ring may include a first push-pull outer ring 364 connected to the first push-pull rod 362, a first push-pull inner ring 368 rotatably connected to the first push-pull outer ring 364, and a plurality of first balls 366 annularly disposed between the first push-pull inner ring 368 and the first push-pull outer ring 364, the first push-pull inner ring 368 is slidably disposed on the horizontal excitation shaft 330 by a key connection, and the first push-pull inner ring 368 is engaged with the first transmission gear 352. By setting the first bearing type push-pull ring as a bearing type rotating structure formed by the push-pull outer ring, the push-pull inner ring and the balls, the first push-pull inner ring 368 of the first bearing type push-pull ring can rotate along with the horizontal excitation rotating shaft 330, but the first push-pull outer ring 364 and the first push-pull rod 362 connected with the first push-pull outer ring 364 can be kept static; moreover, the first push-pull inner ring 368 is slidably disposed on the horizontal excitation rotating shaft 330 in a key connection manner, so that when the first push-pull rod 362 is pushed, the first push-pull outer ring 364 and the first push-pull inner ring 368 can be pushed simultaneously, and the first push-pull inner ring 364 and the first transmission gear 352 can be conveniently combined or separated.

Also, the first push-pull inner ring 368 may include a first inner ring body slidably coupled to the horizontal excitation shaft 330, a first conical ring structure 3682 protruding from an end of the first inner ring body in an axial direction of the first inner ring body, and a first snap spring structure 3684 protruding from the first conical ring structure 3682 in a radial direction of the first conical ring structure 3682. Moreover, a first tapered groove correspondingly matched with the first taper ring structure 3682 is formed at one end of the first transmission gear 352 along the axial direction, and a first clamping groove structure correspondingly matched with the first clamping spring structure 3684 is formed on a side wall surface of the first tapered groove. When the first push-pull outer ring 364 and the first push-pull inner ring 368 are pushed by the first push-pull rod 362, the first conical ring structure 3682 on the end surface of the first inner ring body is clamped into the first conical groove of the first transmission gear 352, and the first snap spring structure 3684 arranged on the first conical ring structure 3682 can be correspondingly clamped with the first clamping groove structure, so that the first conical ring structure 3682 and the first transmission gear 352 can be locked in the radial direction, and the first transmission gear 352 and the first push-pull inner ring structure 360 can be combined. Moreover, an annular mounting groove is annularly disposed on the first cone ring structure 3682, and the first snap spring structure 3684 may include an annular snap spring embedded in the annular mounting groove and an annular snap projection disposed at a top of the annular snap spring, where the annular snap projection is disposed along a radial direction of the first cone ring structure 3682 in a protruding manner. When first conical ring structure 3682 is blocked in the first conical groove along the axial direction, the annular clamping protrusion can be extruded and contracted into the annular mounting groove, and when the annular clamping protrusion reaches the position of the first clamping groove structure, the annular clamping protrusion can be blocked into the first clamping groove structure under the action of the annular clamping spring so as to lock first conical ring structure 3682 and first transmission gear 352 from the radial direction.

In addition, the first crank block structure 370 may include a first crank disk 372 coaxially connected to the first driven gear 354 of the first gear train structure 350, a first crank link 374 hinged to an edge of the first crank disk 372, and a second crank link 376 hinged to the first crank link 374, the second crank link 376 being horizontally slidably disposed on the test cabinet 100, and the horizontal exciter 30 being disposed at an end of the second crank link 376. When the first transmission gear 352 of the first gear transmission structure 350 is combined with the horizontal excitation rotating shaft 330 through the first push ring structure 360, the first transmission gear 352 can drive the first crank disk 372 to rotate through the first driven gear 354, can drive the first crank connecting rod 374 to rotate, and can drive the second crank connecting rod 376 horizontally arranged on the test cabinet 100 to reciprocate, so that the horizontal excitation hammer 330 can be driven to horizontally reciprocate to hammer the wheel 10 to be tested. Furthermore, the first crank disk 372 is formed into a cam structure by hinging the first crank link 374 to the edge of the first crank disk 372, so that the second crank link 376 and the horizontal vibration exciter 330 can be driven to and fro.

In addition, one of the two first shaft seat structures 340 may include a first support seat 342 and a first support bearing structure 344 disposed on the first support seat 342. Furthermore, the first support bearing structure 344 may include a first bearing inner ring 3444, a first bearing outer ring 3442 sleeved outside the first bearing inner ring 3444, and first bearing balls disposed between the first bearing inner ring 3444 and the first bearing outer ring 3442, wherein the first bearing inner ring 3444 is sleeved on the horizontal excitation rotating shaft 330, and the first bearing outer ring 3442 is connected to the first transmission gear 352. Moreover, the first shaft seat structure 340 further includes a first locking pin 346, and when the first transmission gear 352 is separated from the first push ring structure 360, the first locking pin 346 can be inserted into the first support seat 342 and inserted into the first bearing outer ring 3442, so as to fix the first bearing outer ring 3442 on the first support seat 342; when it is desired to couple first transmission gear 352 to first push ring structure 360, first locking pin 346 can be pulled out, so that first bearing outer ring 3444 can rotate along with first transmission gear 352.

As shown in fig. 9, the vertical hammering vibration excitation mechanism 400 may include the tire support structure 600 disposed on the bottom wall of the test cabinet 100, the tire positioning structure 700 disposed on the sidewall of the test cabinet 100, a vertical vibration excitation driving structure disposed on the top of the test cabinet 100, a second slider-crank structure 470 connected to the vertical vibration excitation driving structure, and a vertical hammer 480 disposed at an end of the second slider-crank structure 470 and correspondingly engaged with both the tire positioning structure 600 and the tire support structure 700. The second crank block structure 470 can be driven to work through the vertical excitation driving structure, and the second crank block structure 470 can drive the vertical excitation hammer 480 to reciprocate along the vertical direction, so that the vertical excitation hammer 480 can hammer the circumferential side surface of the tire 14 of the wheel 10 to be tested from the vertical direction, and the radial force transfer function of the tire of the wheel 10 to be tested can be detected. Moreover, the wheel to be tested can be supported from the bottom by the tire supporting structure 600, and the tire to be tested can be axially positioned by the tire positioning structure 700, so that the wheel to be tested 10 is prevented from axially moving in the testing process.

In addition, the vertical hammering vibration excitation mechanism 400 may include a second shaft seat structure 440 disposed on the testing cabinet 100, a vertical vibration excitation rotating shaft 430 penetrating the second shaft seat structure 440 and connected to the vertical vibration excitation driving structure, a second push ring structure 460 disposed on the vertical vibration excitation rotating shaft 430, and a second gear transmission structure 450 connected to the second slider-crank structure 470, wherein the second push ring structure 460 is engaged with the second gear transmission structure 450 and is configured to be coupled to or separated from the second gear transmission structure 450 under an external force. Similarly, the vertical excitation rotating shaft 430 may be rotatably supported by the second shaft seat structure 440 disposed on the testing cabinet 100, and the vertical excitation rotating shaft 430 may be driven to rotate by the vertical excitation driving structure. Moreover, by pushing and pulling the second push ring structure 460, the second gear transmission structure 450 can be combined with the second push ring structure 460, so that the second gear transmission structure 450 is combined with the vertical excitation rotating shaft 430, and the vertical excitation rotating shaft 430 can drive the second slider-crank structure 470 connected with the second gear transmission structure 450 to act, so that the vertical excitation hammer 480 can move in the vertical direction to vertically hammer the wheel 10 to be measured; in addition, the second gear transmission structure 450 and the second push ring structure 460 can be separated by pushing and pulling the second push ring structure 460, so that the second gear transmission structure 450 is separated from the vertical excitation rotating shaft 430, the vertical excitation hammer 430 cannot be vertically moved, and the wheel 10 to be measured cannot be vertically hammered.

Further, the vertical excitation driving structure may include a vertical driving motor 410 disposed on the testing cabinet 100, and a vertical pulley transmission structure 420 connected to an output shaft of the vertical driving motor 410, wherein the second slider-crank structure 470 is connected to the vertical pulley transmission structure 420 through a second gear transmission structure 450, a second push ring structure 460 and a vertical excitation rotating shaft 430. In this embodiment, the vertical excitation driving structure may be shared with the horizontal excitation driving structure, the vertical excitation rotating shaft 430 may be provided as the same rotating shaft as the horizontal excitation rotating shaft 330, and the second shaft bearing structure 440 may be shared with the first shaft bearing structure 340. That is, the vertical vibration excitation driving structure may include a horizontal driving motor disposed on the testing cabinet 100 and a horizontal pulley transmission structure connected to an output shaft of the horizontal driving motor, and the second slider-crank structure 470 is connected to the horizontal pulley transmission structure 320 through the second gear transmission structure 450, the second push ring structure 460 and the horizontal vibration excitation rotating shaft 330. Therefore, the vertical hammering excitation mechanism and the horizontal hammering excitation mechanism can share part of structures, and are compact in structure and lower in cost.

Moreover, the second gear transmission structure 450 may include a second transmission gear 452 movably sleeved on the vertical vibration-exciting rotating shaft 430 and connected to the second shaft seat structure 440, and a second driven gear 454 engaged with the second transmission gear 452 and rotatably disposed on the testing cabinet 100, wherein the second driven gear 454 is connected to the second slider-crank structure 370. That is, the specific structure of the second gear transmission structure 450 is substantially the same as the specific structure of the first gear transmission structure 350, and the functions of the two structures are substantially the same.

Moreover, the second push-pull ring structure 460 may include a second push-pull rod slidably disposed on the testing cabinet 100, and a second bearing type push-pull ring connected to the second push-pull rod, the second bearing type push-pull ring is slidably connected to the vertical excitation rotating shaft 430 by a key connection manner, and the second bearing type push-pull ring is engaged with the second transmission gear 452, and the second push-pull rod is configured to stretch and drive the second bearing type push-pull ring to move under an external force, so that the second bearing type push-pull ring is combined with or separated from the second transmission gear. Similarly, the second bearing type push-pull ring slidably disposed on the vertical excitation rotating shaft 430 in a key connection manner can be pushed by pushing and pulling the second push-pull rod of the second push-pull ring structure 360, so that the second bearing type push-pull ring is combined with the second transmission gear 452 of the second gear transmission structure 450, the vertical excitation rotating shaft 430 can drive the second bearing type push-pull ring and the second transmission gear 452 to rotate together, and the second slider-crank structure 470 connected with the second driven gear 454 is driven to work to drive the vertical excitation hammer to vertically move.

Further, the second bearing type push-pull ring may include a second push-pull outer ring coupled to the second push-pull rod, a second push-pull inner ring rotatably coupled to the second push-pull outer ring, and a plurality of second balls disposed between the second push-pull inner ring and the second push-pull outer ring, wherein the second push-pull inner ring is slidably disposed on the vertical excitation rotating shaft 430 by a key connection, and the second push-pull inner ring is engaged with the second transmission gear 452. Also, the second push-pull inner ring may include a second inner ring body slidably coupled to the vertical excitation shaft 430, a second taper ring structure protruding from an end of the second inner ring body in an axial direction of the second inner ring body, and a second snap spring structure protruding from the second taper ring structure in a radial direction of the second taper ring structure. And, one end of the second transmission gear 452 is axially provided with a second taper groove correspondingly matched with the second taper ring structure, and a side wall surface of the second taper groove is provided with a second clamping groove structure correspondingly matched with the second clamping spring structure. That is, the specific structure of the second push ring structure 460 is the same as the specific structure of the first push ring structure 360, and the functions of the two are also the same.

In addition, the second crank block structure 470 may include a second crank disk 472 coaxially connected to the second driven gear 454 of the second gear transmission structure 450, a third crank link 474 hinged to an edge of the second crank disk 472, and a fourth crank link 476 hinged to the third crank link 474, the fourth crank link 476 being vertically slidably provided on the test cabinet 100, and the vertical exciter 480 being vertically provided at an end of the fourth crank link 476. That is, the specific structure of the second crank block structure 470 is substantially the same as the specific structure of the first crank block structure 370, and the functional functions thereof are substantially the same. In addition, the specific structure of the second shaft seat structure is the same as that of the first shaft seat structure, and is not described herein again.

In addition, aiming at the device for testing the force transfer function of the tire under the excitation vibration, the invention provides a method for testing the force transfer function of the tire under the excitation vibration test, which comprises the following steps:

s100, controlling a lifting vibration excitation mechanism to detect the NVH uniformity of the tire of the wheel to be detected;

s200, controlling a horizontal hammering vibration excitation mechanism to detect the axial and lateral force transfer functions of the tire of the wheel to be detected;

and S300, controlling the vertical hammering vibration excitation mechanism to detect the radial force transfer function of the tire of the wheel to be detected.

As shown in fig. 10, in the testing method provided by the present invention, when performing each test, the vibration sensor 20 needs to be installed on the wheel 10 to be tested. Moreover, in the present embodiment, the same patch type vibration sensor is used for each of the plurality of vibration sensors 20. Specifically, a plurality of vibration sensors 20 are uniformly attached to the center disk of the rim 12 of the wheel 10 under test, and a plurality of vibration sensors 20 are uniformly attached to the neutral surface of the tire 14 of the wheel 10 under test. Specifically, four vibration sensors 20 can be uniformly attached to the rim center plate of the wheel 10 to be measured, and each vibration sensor 20 is located between two adjacent mounting holes of the rim and is parallel to the direction of the center connecting line of the adjacent mounting holes; four vibration sensors 20 can be uniformly attached to the neutral surface of the tire of the wheel 10 to be measured, and the plane formed by the central connecting lines of the two vibration sensors at opposite positions passes through the wheel center and is perpendicular to the central connecting line of the adjacent rim mounting holes.

Further, in step S100, namely the step of controlling the lifting excitation mechanism to detect the NVH uniformity of the tire of the wheel to be tested, the method specifically includes the following steps:

s110, arranging the wheel 10 to be tested on a swing platform 230 of the lifting excitation mechanism 200;

in an initial state, the upper surface of the swing platform 230 is parallel to the ground, and when the NVH uniformity of the tire is detected, the height of the piston rod of the lift driving cylinder 226 of the lift driving structure 220 needs to be controlled, so that the safety distance requirement between the upper surface of the lift supporting platform 630 of the tire supporting structure 600 and the lower surface of the swing platform 230 is met, and interference is avoided during movement.

Moreover, when the wheel 10 to be measured is placed on the swing platform 230 at the initial position, the axial center line of the wheel 10 to be measured needs to be overlapped with the longitudinal center line of the swing platform 230, and the normal plane of the center connecting line of two adjacent vibration sensors 20 on the tread of the wheel 10 to be measured is parallel to the side vertical plane of the swing platform 230.

And S120, controlling the lifting driving structure 220 of the lifting excitation mechanism 200 to lift and swing the swing platform 230 so as to swing the wheel 10 to be tested on the swing platform 230 and test the NVH uniformity of the tire of the wheel 10 to be tested.

When the plurality of electric hydraulic cylinders 226 of the lifting driving structure 220 are controlled to synchronously lift and lower to drive the swing platform 230 to swing, the upper surface of the swing platform 230 generates a surface exciting force on the lower surface of the wheel 10 to be measured, and the acquisition results of the vibration sensors 20 are read and recorded as a first set of data.

Similarly, after the wheel 10 to be measured is rotated by 90 °, 180 ° and 270 ° around the axial center line thereof, the excitation operation is repeated, and the second, third, and fourth sets of data are recorded. And then, comparing and analyzing the four groups of data, and when the difference value of the data acquired by each group of vibration sensors 20 at the same position in the detection is within the error allowable range, judging that the NVH uniformity detection of the tire of the wheel to be detected is passed, otherwise, replacing the wheel to be detected and carrying out test verification again if the NVH uniformity detection of the tire of the wheel to be detected is not passed.

In step S200, namely the step of controlling the horizontal hammering vibration excitation mechanism to detect the axial force transfer function and the lateral force transfer function of the tire of the wheel to be tested, the method specifically includes the following steps:

s210, controlling the horizontal hammering vibration excitation mechanism 300 to detect an axial force transfer function of the tire of the wheel 10 to be detected;

and S220, controlling the horizontal hammering excitation mechanism 300 to detect the lateral force transfer function of the tire of the wheel 10 to be detected.

Before the test, the lifting rope 520 (nylon rope) of the tire limiting structure 500 is passed through the lifting lug structure 510 of the test cabinet 100 and the window of the wheel 10 to be tested, the height of the wheel 10 to be tested is adjusted so that the center of the wheel is on the central motion trajectory line of the horizontal vibration hammer 380 of the horizontal hammering vibration excitation mechanism 300, and the lifting rope 520 is tied and then suspended on the lifting lug structure 510 of the test cabinet 100.

In step S210, namely the step of controlling the horizontal hammering vibration excitation mechanism to detect the axial force transfer function of the tire of the wheel to be tested, the method specifically includes the following steps:

s212, pushing the first push ring structure 360 to the limit position, so that the first push ring structure 360 is combined with the first gear transmission structure 350, and the horizontal excitation rotating shaft 330 is combined with the first gear transmission structure 350;

s214, starting the horizontal driving motor 310 of the horizontal excitation driving structure, wherein the horizontal driving motor 310 drives the horizontal excitation rotating shaft 330 to rotate, and the horizontal excitation rotating shaft 330 drives the first push ring structure 360, the first gear transmission structure 350 and the first crank slider structure 370 to rotate, so as to drive the horizontal excitation hammer 330 to perform hammering excitation on the outer end surface (the front surface) of the tire of the wheel 10 to be tested along the axial direction of the tire from the horizontal direction;

s216, acquiring the acquisition results of the vibration sensors 20 arranged on the tire 14 and the hub 12 of the wheel 10 to be tested and recording data;

s218, resetting the horizontal driving motor 310 of the horizontal excitation driving structure, and pulling the first push ring structure 360 to an initial position, so as to separate the first push ring structure 360 from the first gear transmission structure 350, and separate the horizontal excitation rotating shaft 330 from the first gear transmission structure 350;

s219, analyzing the data acquired by each vibration sensor 20 in a frequency domain, extracting the information of the vibration sensors 20 on the rim 12 of the wheel 10 to be tested, and reducing the influence of rim vibration on the test result.

In addition, the step S220 of "controlling the horizontal hammering vibration excitation mechanism to detect the lateral force transfer function of the tire of the wheel to be tested" specifically includes the following steps:

s222, pushing the first push ring structure 360 to the limit position, so that the first push ring structure 360 is combined with the first gear transmission structure 350, and the horizontal excitation rotating shaft 330 is combined with the first gear transmission structure 350;

s224, starting the horizontal driving motor 310 of the horizontal excitation driving structure, wherein the horizontal driving motor 310 drives the horizontal excitation rotating shaft 330 to rotate, and the horizontal excitation rotating shaft 330 drives the first push ring structure 360, the first gear transmission structure 350 and the first crank slider structure 370 to rotate, so as to drive the horizontal excitation hammer 380 to perform hammering excitation on the circumferential surface (side tread) of the tire of the wheel 10 to be tested along the radial direction of the tire from the horizontal direction;

s226, acquiring the acquisition results of the vibration sensors 20 arranged on the tire and the hub of the wheel 10 to be tested and recording data;

s238, resetting the horizontal driving motor 310 of the horizontal excitation driving structure, and pulling the first push ring structure 360 to an initial position, so that the first push ring structure 360 is separated from the first gear transmission structure 350, and the horizontal excitation rotating shaft 330 is separated from the first gear transmission structure 350;

and S229, analyzing the data acquired by each vibration sensor in a frequency domain, extracting the information of the vibration sensors on the rim of the wheel to be tested, and reducing the influence of rim vibration on the test result.

Before testing, the coupling 710 of the tire positioning structure 700 is connected with the connecting boss on the side wall of the testing cabinet and the wheel shaft 720, the wheel 10 to be tested is mounted on the wheel shaft 720, the wheel 10 to be tested is rotated to enable the normal plane of the central connecting line of the two adjacent vibration sensors 20 on the tire surface of the wheel to be tested to be vertical or parallel to the ground, the locking disc 730 is screwed in to limit the axial movement of the wheel 10 to be tested, the tail end of the wheel shaft is tapped with a threaded hole, and the shaft end of the locking disc is tapped and connected with the shaft end of the locking disc. In addition, the piston rod of the supporting telescopic driving cylinder 620 of the tire supporting structure 600 is controlled to lift the lifting supporting platform 630, so that the upper surface of the lifting supporting platform is attached to the lower side tire surface of the wheel 10 to be measured, the tire surface is slightly deformed, the rotation of the wheel 10 to be measured around the shaft is limited, and the inner surface of the center hole of the wheel to be measured bears load.

In addition, the step S300 of "controlling the vertical hammering vibration excitation mechanism to detect the radial force transfer function of the tire of the wheel to be tested" specifically includes the following steps:

310. pushing the second push ring structure 470 to the limit position, so that the second push ring structure 470 is combined with the second gear transmission structure 450, and the vertical excitation rotating shaft 430 is combined with the second gear transmission structure 450;

320. starting the vertical driving motor 410 of the vertical excitation driving structure, wherein the vertical driving motor 410 drives the vertical excitation rotating shaft 430 to rotate, and the vertical excitation rotating shaft 430 drives the second push ring structure 470, the second gear transmission structure 450 and the second slider-crank structure 470 to rotate so as to drive the vertical excitation hammer 480 to hammer and excite the circumferential surface (side tread) of the tire of the wheel 10 to be tested along the radial direction of the tire from the vertical direction;

330. acquiring the acquisition results of all vibration sensors 20 arranged on the tire and the hub of the wheel 10 to be detected and recording data;

340. resetting the vertical driving motor 410 of the vertical excitation driving structure, and pulling the second push ring structure 460 to an initial position, so that the second push ring structure 460 is separated from the second gear transmission structure 450, and the vertical excitation rotating shaft 430 is separated from the second gear transmission structure 450;

350. the data acquired by each vibration sensor 20 are analyzed in a frequency domain, the information of the vibration sensors 20 on the rim 14 of the wheel 10 to be tested is extracted, and the influence of rim vibration on the test result is reduced.

Similarly, before the test, the coupling 710 of the tire positioning structure 700 is connected to the connecting boss and the wheel axle 720 on the side wall of the test cabinet 100, the wheel 10 to be tested is mounted on the wheel axle 720, the wheel 10 to be tested is rotated to enable the normal plane of the center connecting line of the two adjacent vibration sensors 20 on the tread of the wheel to be tested to be perpendicular to or parallel to the ground, and the locking disc 730 is screwed in to limit the axial movement of the wheel to be tested. In addition, the piston rod of the supporting telescopic driving oil cylinder 620 of the tire supporting structure 600 is controlled to lift the lifting supporting platform 630, so that the upper surface of the lifting supporting platform is attached to the lower side tire surface of the wheel to be measured, the tire surface is slightly deformed, the rotation of the wheel to be measured around the shaft is limited, and the inner surface of the center hole of the wheel to be measured bears the load.

According to the scheme provided by the invention, the input force of the excitation device is stable, the excitation force and the direction error in manual testing can be avoided, and a more real and accurate test result can be obtained; a plurality of test contents can be completed by a single person, so that the test efficiency can be improved, and the labor cost can be saved; detecting the NVH uniformity problem of the tire through testing; during testing, the vibration sensor is additionally attached to the rim, data are analyzed, and the influence of rim vibration on a test result is reduced.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for testing a force transfer function of a tire under excitation, comprising:

a test cabinet body;

2. The apparatus as claimed in claim 1, wherein the horizontal hammering vibration exciting mechanism includes a first shaft seat structure disposed on the testing cabinet, a horizontal vibration exciting rotating shaft penetrating the first shaft seat structure and connected to the horizontal vibration exciting driving structure, a first push ring structure disposed on the horizontal vibration exciting rotating shaft, and a first gear transmission structure connected to the first crank block structure, wherein the first push ring structure is engaged with the first gear transmission structure and is used for being combined with or separated from the first gear transmission structure under an external force.

3. The apparatus for testing force transfer function under shock excitation of a tire as claimed in claim 2, wherein said first gear transmission structure comprises a first transmission gear movably sleeved on said horizontal shock excitation rotating shaft and connected to said first shaft base structure, and a first driven gear engaged with said first transmission gear and rotatably disposed on said testing cabinet, said first driven gear being structurally connected to and engaged with said first slider-crank;

4. The apparatus for testing force transfer function of a tire subjected to excitation according to claim 3, wherein said first bearing type push-pull ring comprises a first push-pull outer ring connected to said first push-pull rod, a first push-pull inner ring rotatably connected to said first push-pull outer ring, and a plurality of first balls annularly disposed between said first push-pull inner ring and said first push-pull outer ring, said first push-pull inner ring is slidably disposed on said horizontal excitation rotating shaft by a key connection, and said first push-pull inner ring is engaged with said first transmission gear.

5. The apparatus for testing force transfer function under excitation of a tire according to claim 4, wherein said first push-pull inner ring comprises a first inner ring main body in sliding connection with said horizontal excitation shaft, a first conical ring structure protruding from an end of said first inner ring main body in an axial direction of said first inner ring main body, and a first snap spring structure protruding from a radial direction of said first conical ring structure and disposed on said first conical ring structure;

6. The apparatus as claimed in claim 2, wherein the first slider-crank structure comprises a first crank disk connected to the first gear mechanism, a first crank link hinged to an edge of the first crank disk, and a second crank link hinged to the first crank link, the second crank link is horizontally slidably disposed on the testing cabinet, and the horizontal vibration exciter is disposed at an end of the second crank link.

7. The apparatus for testing force transfer function by exciting vibration of tire according to any one of claims 1 to 6, wherein said horizontal exciting driving structure comprises a horizontal driving motor disposed on said testing cabinet, and a horizontal pulley transmission structure connected to an output shaft of said horizontal driving motor, said first slider-crank structure being connected to said horizontal pulley transmission structure;

8. The apparatus for testing force transfer function by exciting a tire according to any one of claims 1 to 6, wherein the tire supporting structure comprises a supporting telescopic driving structure hinged to the bottom wall of the testing cabinet, and a lifting supporting platform hinged to the top of the supporting telescopic driving structure;

the tire positioning structure comprises a coupler connected to the side wall of the testing cabinet body, a wheel shaft connected with the coupler and used for penetrating through a wheel to be tested, and a locking disc connected to the end part of the wheel shaft.

9. The device for testing the force transfer function of the tire under the excitation according to any one of claims 1 to 6, wherein the vertical hammering excitation mechanism comprises a second shaft seat structure arranged on the testing cabinet, a vertical excitation rotating shaft penetrating through the second shaft seat structure and connected with the vertical excitation driving structure, a second push ring structure arranged on the vertical excitation rotating shaft, and a second gear transmission structure connected with the second crank-slider structure, wherein the second push ring structure is matched with the second gear transmission structure and used for being combined with or separated from the second gear transmission structure under the action of external force.

10. A method for testing a force transfer function of a tire subjected to shock excitation testing is characterized by comprising the following steps: