CN114323700A

CN114323700A - Tire testing machine

Info

Publication number: CN114323700A
Application number: CN202111580469.3A
Authority: CN
Inventors: 杜伟; 唐顺锋; 王先亮; 鲁守浩; 高丰春; 马骏; 邹国杰
Original assignee: Qingdao Gaoce Technology Co Ltd
Current assignee: Qingdao Houze Jinye Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-04-12
Anticipated expiration: 2041-12-22
Also published as: CN114323700B

Abstract

The invention discloses a tire testing machine, wherein a rotary drum part comprises a rotary drum, a station shaft is used for mounting a tire to be tested, a loading part is used for driving the station shaft to move towards a direction close to or far away from the rotary drum, a sliding angle function system is used for realizing the up-and-down inclination of the station shaft and simultaneously detecting the inclination angle of the station shaft, and an inclination angle function system is used for realizing the swinging of the station shaft in the plane of the station shaft and simultaneously detecting the swinging angle of the station shaft. The tire testing machine can test the durability, the inclination angle and the slip angle of the tire, is multifunctional and integrated, meets the market demand and improves the product competitiveness.

Description

Tire testing machine

Technical Field

The invention relates to the technical field of tire testing, in particular to a tire durability testing machine with a dip angle and slip angle testing function.

Background

To ensure the safety and comfort of the vehicle during the running, each batch of tires developed or produced is sampled and subjected to a performance test, which includes the performance testing of the finished tires by mounting the tires on a tire testing machine.

In a performance test machine applied to a giant engineering mechanical tire (such as a seven-meter drum engineering mechanical tire), the performance test machine only has a durability performance test function generally, cannot simulate the requirements of working condition tests such as road surface inclination, sideslip and the like, has a single performance test function, and cannot meet the test requirements of the market on the giant engineering mechanical tire.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

The invention provides a tire testing machine aiming at the problems pointed out in the background technology, which can carry out durability test on a tire under the working condition of simulating the inclination and sideslip of a road surface, is multifunctional and integrated, meets the market demand and improves the product competitiveness.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

the invention provides a tire testing machine, comprising:

a drum part including a drum;

a station axis for mounting a tire to be tested;

the loading part is used for driving the station shaft to move towards the direction close to or far away from the rotary drum;

the sliding angle function system is used for realizing the up-and-down inclination of the station shaft and detecting the inclination angle of the station shaft;

and the inclination angle functional system is used for realizing the swinging of the station shaft in the plane where the station shaft is positioned and detecting the swinging angle of the station shaft.

In some embodiments of the present application, the sliding angle function system includes a frame and a sliding angle driving component, the station shaft is disposed on the frame, the sliding angle driving component is used for driving the frame to rotate, and a rotation axis of the frame extends along a horizontal direction.

In some embodiments of the present application, the sliding angle driving assembly includes a sliding angle driving portion, the sliding angle driving portion is rotatably connected to a base of the tire testing machine, and a power output end of the sliding angle driving portion is hinged to the frame;

the sliding angle driving parts are provided with at least two sets and are respectively arranged on two sides of the rack.

In some embodiments of the present application, the sliding angle function system further includes a sliding angle detection device for detecting a rotation angle of the rack.

In some embodiments of the present application, the tilt function system includes a tilt driving assembly, which is configured to drive the moving end of the station shaft to move back and forth relative to the drum and drive the rotating end of the station shaft to rotate in situ, and a rotation axis of the rotating end extends in a vertical direction.

In some embodiments of the present application, the tilt driving assembly includes a tilt driving part, a movable seat and a rotary seat, the movable end of the station shaft is connected to the movable seat, and the rotary end of the station shaft is connected to the rotary seat;

the movable seat is connected with the power output end of the inclination angle driving part and is arranged on the rack in a sliding manner, and the movable seat can move back and forth relative to the rotary drum;

the rotating seat is rotatably arranged on the rack, and the rotating axis of the rotating seat extends along the vertical direction.

In some embodiments of the present application, the tilt driving assembly further includes a tilt detecting device for detecting a rotation angle of the rotary base;

the frame is provided with a rotating shaft, the rotating shaft can rotate relative to the frame, the rotating seat is fixedly connected with the rotating shaft, and the inclination angle detection device is arranged on the rotating shaft.

In some embodiments of the present application, a bearing sleeve is disposed in the rotating base, a rotating end of the station shaft rotatably penetrates through the bearing sleeve, and the rotating end of the station shaft has an extending end extending out of the rotating base, and an axial force sensor for detecting an axial force of the station shaft is disposed on one side of the extending end.

In some embodiments of this application, be equipped with the end shell on the roating seat, stretch out the end and stretch into in the end shell, be equipped with in the end shell axial force sensor and axial bearing portion, axial bearing portion with stretch out the end and connect, axial bearing portion is used for bearing the axial force of station axle, and will the axial force transmits extremely axial force sensor.

In some embodiments of the present application, the drum portion further includes a drum driving motor, a power output end of the drum driving motor is connected to a gear, a gear ring is disposed on the drum along a circumferential direction of the drum, and the gear is engaged with an inner circumference of the gear ring.

Compared with the prior art, the invention has the advantages and positive effects that:

the tire testing machine disclosed in the application can realize that the giant engineering machinery tire carries out functional tests under working conditions of simulating road surface inclination, sideslip and the like through a slip angle (-5 degrees), an inclination angle (-5 degrees), integrates tire durability test, slip angle test and inclination angle test functions, realizes the slip angle test function through the rotation of the second rack in a vertical plane, realizes the inclination angle test function through the movement of one end of the station shaft and the rotation of the other end, and is simple and compact in whole realization structure, and the problem that the pain point of the tire testing machine with comprehensive performance on the giant engineering machinery tire does not exist in the prior art is solved.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

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

Fig. 1 is a schematic structural view of a tire testing machine according to an embodiment;

FIG. 2 is a schematic structural diagram of a first rack and a second rack portion according to an embodiment;

FIG. 3 is a schematic view of the structure shown in FIG. 2 cut along a cutting plane P;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is a schematic view of an installation structure of the inclination angle detecting device according to the embodiment;

FIG. 6 is a schematic structural diagram of a station axis, a movable base and a rotary base according to an embodiment;

FIG. 7 is an assembled cross-sectional view between the station shaft and the mobile station according to an embodiment;

FIG. 8 is a sectional view of the assembly between the station axle and the rotary base according to the first embodiment;

FIG. 9 is an assembled sectional view of the station shaft and the rotary base according to the second embodiment;

FIG. 10 is an assembled sectional view of the station shaft and the rotary base according to the third embodiment;

fig. 11 is an assembled cross-sectional view of an axial force transmitting portion according to a third embodiment;

FIG. 12 is a schematic structural diagram of a load coupling apparatus according to an embodiment;

FIG. 13 is an assembled cross-sectional view of a load attachment according to an embodiment;

fig. 14 is a schematic structural view of a drum unit according to the embodiment.

Reference numerals:

1-a tyre to be tested;

100-frame part, 110-fixed frame, 120-first frame, 121-first support frame, 122-second support frame, 130-second frame, 131-first frame part, 132-second frame part, 133-third frame part, 134-slideway, 135-rotating shaft, 136-supporting shaft and 137-rotating shaft;

200-station shaft, 210-moving seat, 211-second bearing sleeve, 212-second cylindrical roller bearing, 220-rotating seat, 221-first bearing sleeve, 222-first cylindrical roller bearing, 230-end shell, 231-axial supporting flange, 232-end connecting flange, 240-moving end of station shaft, 250-rotating end of station shaft, 251-protruding end;

300-a loading part, 310-a third hydraulic oil cylinder and 320-an oil cylinder seat;

400-a rotary drum part, 410-a rotary drum, 420-a rotary drum driving motor, 430-a gear and 440-a gear ring;

500-a sliding angle driving part, 510-a first hydraulic oil cylinder, 520-a sliding angle detecting device, 530-a first hinge and 540-a second hinge;

600-tilt angle drive, 610-second hydraulic cylinder, 620-tilt angle detection device;

700-loading connection device, 710-force sensor, 720-force sensor connection flange, 730-force sensor fixing seat, 740-joint bearing, 750-joint shaft and 760-joint bearing seat;

810-axial bearing, 811-axial bearing sleeve, 812-axial bearing flange, 813-bearing, 814-first flange, 815-second flange, 816-spherical flange, 817-toothed sleeve, 818-toothed spherical flange;

820-axial force sensor, 821-first mount, 822-second mount.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

[ tire testing machine ]

The present embodiment discloses a tire testing machine which can realize the tests of the durability, the slip angle, and the inclination angle of a tire.

The tire testing machine can be applied to the performance test of giant engineering machinery tires, such as seven-meter drum engineering machinery tires.

Referring to fig. 1 and 2, the tire testing machine mainly includes a loading portion 300, a drum portion 400, a frame portion 100, a station axis 200, a slide angle driving assembly, a tilt angle driving assembly, and the like. The loading section 300, the drum section 400, and the station axis 200 are arranged in a line.

The sliding angle function system is used for realizing the up-and-down inclination of the station shaft 200 and detecting the inclination angle of the station shaft 200;

the inclination angle function system is used for realizing the swing of the station shaft 200 in the plane where the station shaft is located and detecting the swing angle of the station shaft 200.

The housing part 100 includes a fixed housing 110 and a movable housing. The fixed frame 110 is equivalent to a base of the entire testing machine, and the movable frame, the loading part 300, and the drum part 400 are all disposed on the fixed frame 110.

The drum part 400 includes a rotary drum 410, a station axis 200 for mounting the tire 1 to be tested, and a loading part 300 for generating a driving force to move the station axis 200 and the rotary drum 410 toward or away from each other.

During testing, the loading part 300 acts, the station shaft 200 and the rotary drum 410 are close to each other, the tire 1 to be tested on the station shaft 200 and the rotary drum 410 are in a pressing tangent state, radial loading of the tire is achieved, and the tire and the rotary drum rotate relatively to complete related performance testing.

The movable frame includes a first frame 120 and a second frame 130, the second frame 130 is rotatably disposed on the first frame 120, and the second frame 130 is located above the first frame 120. The station axis 20 is provided on the second frame 130.

There is a gap between the first frame 120 and the second frame 130 to prevent the first frame 120 from interfering with the movement of the second frame 130.

The first frame 120 and the rotating drum 410 can move relatively to each other, and as can be seen from the above, the first frame 120 and the rotating drum 410 can move relatively to each other under the driving action of the loading part 300.

The sliding angle driving assembly is used for driving the second rack 130 to rotate around the supporting shaft 136, the rotating axis of the second rack 130 extends along the horizontal direction, and the working shaft 200 and the tire 1 to be tested on the working shaft are driven to rotate synchronously, so that the sliding angle detection function is realized.

The inclination angle driving assembly is used for driving the moving end 240 of the station shaft 200 to move back and forth relative to the rotary drum 410, and driving the rotating end 250 of the station shaft 200 to rotate in place, and the rotating axis of the rotating end 250 extends along the vertical direction, so that the inclination angle detection function is realized.

The measurement of the sliding angle is realized through the sliding angle detection device, the measurement of the inclination angle is realized through the inclination angle detection device, and the angle detection information is uploaded to the control system to realize closed-loop control.

The tire testing machine disclosed in the embodiment can realize that the giant engineering machinery tire performs functional tests under the working conditions of simulating road surface inclination, sideslip and the like through a slip angle (-5 degrees) and an inclination angle (-5 degrees), integrates the functions of tire durability test, slip angle test and inclination angle test, realizes the function of slip angle detection through the rotation of the second rack 130 in a vertical plane, realizes the function of inclination angle detection through the movement of one end and the rotation of the other end of the station shaft 200, has a simple and compact whole realization structure, and solves the problem that no pain point of the tire testing machine with comprehensive performance on the giant engineering machinery tire exists in the prior art.

[ first frame, second frame ]

The rotating connection structure between the first frame 120 and the second frame 130 is specifically as follows:

referring to fig. 2 and 3, the first frame 120 has a first support frame 121 and a second support frame 122 arranged at an interval, a support shaft 136 is arranged between the first support frame 121 and the second support frame 122, the support shaft 136 is perpendicular to the station axis 200, and the second frame 130 is rotatably arranged on the support shaft 136 to realize rotation in a vertical plane.

As can be seen from the figure, the two sliding angle driving portions are disposed on two sides of the front end (the side close to the rotating drum 410) of the second frame 130, the supporting shaft 136 is disposed on the rear end (the side far from the rotating drum 410) of the second frame 130, the second frame 130 is supported by three points, and the whole structure is more stable and reliable.

As to the specific structure of the second frame 130, in some embodiments of the present application, the second frame 130 is a C-shaped structure, and includes a first frame portion 131, a second frame portion 132, and a third frame portion 133, the first frame portion 131 is rotatably disposed on the supporting shaft 136, one end of the station shaft 200 is connected to the second frame portion 132, and the other end of the station shaft 200 is connected to the third frame portion 133.

The first frame 120 is also in a C-shaped configuration corresponding to the C-shaped configuration of the second frame 130, which is more stable on the one hand and leaves a mounting space for the tire 1 to be tested on the station axle 200 on the other hand.

Referring to fig. 2, the second frame second portion 132 and the second frame third portion 133 are rotatably connected to the first frame 120 through a rotating shaft 135 at an end away from the second frame first portion 131, so as to increase a rotation connection point, and further improve the rotation reliability of the second frame 130.

The relative movement between the first frame 120 and the drum 410 may be the movement of the drum 400 driven by the loading unit 300, or the movement of the first frame 120 driven by the loading unit 300.

For the test of the giant engineering mechanical tire, the size of the drum part 400 is relatively large, and the loading force required for driving the drum part 400 to move is larger and is not easy to be accurately controlled, so the loading part 300 is adopted to drive the first frame 120 to move in this embodiment.

Specifically, the power output end of the loading unit 300 is connected to the first frame 120, and directly drives the first frame 120 to move toward or away from the rotating drum 410, so as to drive the tire 1 to be tested disposed on the second frame 130 to move toward or away from the rotating drum 410. The power output end of the loading part 300 is specifically connected with the first support frame 121 on the first frame 120.

The first frame 120 is slidably disposed on the fixed frame 110, a slide is disposed on the fixed frame 110, and the first frame 120 is slidably disposed in the slide.

The fixed frame 110 is provided with a position sensor (not shown) for detecting the displacement of the first frame 120.

[ sliding Angle drive Assembly ]

In some embodiments of the present application, referring to fig. 2, the sliding angle driving assembly includes a sliding angle driving part 500, the sliding angle driving part 500 is rotatably connected to the first frame 120, and a power output end of the sliding angle driving part 500 moves in a vertical direction and is hinged to the second frame 130.

In an embodiment, the sliding angle driving part 500 is a hydraulic cylinder (referred to as a first hydraulic cylinder 510), a cylinder body of the first hydraulic cylinder 510 is rotatably connected to the first frame 120 through a first hinge 530, and a power output end (i.e., a piston rod) of the first hydraulic cylinder 510 is rotatably connected to the second frame 130 through a second hinge 540. The piston rod of the first hydraulic cylinder 510 extends out, so that the second frame 130 can rotate in the vertical plane.

Further, the sliding angle driving assemblies have at least two sets, and are respectively disposed on two sides of the second frame 130, that is, two sides of the second frame 130 are respectively provided with the first hydraulic cylinder 510.

When the second frame 130 is driven to rotate, the piston rod of the first hydraulic cylinder 510 on one side moves upward, and the piston rod of the first hydraulic cylinder 510 on the other side moves downward, so that both sides of the second frame 130 can be effectively driven and supported in a rotating manner, and the rotating reliability of the second frame 130 is improved.

Referring to fig. 3 and 4, the second frame 130 is provided with a sliding angle detecting device 520 for detecting a rotation angle of the second frame 130. In this embodiment, the sliding angle detection device 520 is a sliding angle displacement sensor, and when the second frame 130 rotates, the sliding angle displacement sensor is driven to rotate synchronously, so that the sliding angle is measured under the action of gravity, and the sliding angle information is uploaded to the control system, thereby realizing closed-loop control.

[ Tilt angle drive Assembly ]

The tilt driving assembly includes a tilt driving part 600, a movable base 210, and a rotary base 220.

Referring to fig. 6, one end of the station shaft 200 is a moving end 240, and the other end is a rotating end 250, the moving end 240 of the station shaft is rotatably connected to the moving base 210, and the rotating end 250 of the station shaft is rotatably connected to the rotating base 220.

The movable base 210 is connected to the power output end of the tilt driving portion 600 and slidably disposed on the second frame 130 (specifically, the second frame second portion 132), the movable base 210 can move toward a direction close to or away from the rotary drum 410, that is, the movable base 210 moves forward and backward relative to the rotary drum 410 and drives the station shaft to rotate in place, and the rotation axis of the rotation end extends in the vertical direction.

The rotary base 220 is rotatably disposed on the second frame 130 (specifically, the third frame portion 133), and the rotary base 220 can rotate in a plane formed by the rotation end 250 and the moving end 240 moving back and forth.

The tilt angle driving portion 600 is specifically a hydraulic cylinder (denoted as a second hydraulic cylinder) 610, a mounting cavity (not denoted) is formed in the second frame 130, a cylinder body of the second hydraulic cylinder 610 is fixedly disposed in the mounting cavity, and a piston rod of the second hydraulic cylinder 610 directly drives the movable base 210 to move.

The second frame 132 is provided with a slide 134, and the movable base 210 is slidably disposed in the slide 134, so as to perform the functions of installation and movement guidance for the movable base 210.

The structures of the movable seat 210 and the rotary seat 220 realize the installation of the station shaft 200, and also realize the function of performing inclination angle test by moving one end of the working shaft 200 and rotating the other end thereof, and the structure is relatively simple and low in cost.

Regarding the rotation structure of the rotary base 220 in the horizontal plane, in some embodiments of the present application, referring to fig. 8, the third frame 133 is provided with a rotation shaft 137, the rotation shaft 137 is rotatable relative to the second frame 130, and the rotary base 220 is fixedly connected to the rotation shaft 137.

When the movable base 210 drives the movable end 240 of the station axis to move towards a direction close to or away from the rotary drum 410, since the distance of the rotary base 220 relative to the rotary drum 410 is not changed, the rotating end 250 of the station axis can drive the rotary base 220 and the rotating shaft 137 connected with the rotary base to rotate, thereby realizing the tilt function.

Referring to fig. 5, the rotating shaft 137 is provided with an inclination angle detection device 620 for detecting a rotation angle of the rotating base 220, in this embodiment, the inclination angle detection device 620 is an inclination angle displacement sensor and is located on a rotation axis of the rotating shaft 137, and when the rotating base 220 drives the rotating shaft 137 to rotate, the inclination angle displacement sensor can measure the inclination angle information and upload the information to the control system, thereby implementing closed-loop control.

[ Structure for assembling moving end and rotating end of work position shaft ]

Regarding the rotating connection structure between the moving end 240 of the station shaft and the moving base 210, referring to fig. 7 in some embodiments of the present application, a second bearing sleeve 211 is disposed in the moving base 210, the moving end 240 of the station shaft rotatably penetrates through the second bearing sleeve 211 and has an extending end 251 extending outside the rotating base 220, and an axial force sensor 820 for detecting an axial force of the station shaft 200 is disposed on one side of the extending end 251. A second cylindrical roller bearing 212 is provided between the second bearing housing 211 and the moving end 240.

Regarding the rotating connection structure between the rotating end 250 of the station shaft and the rotating base 220, in some embodiments of the present application, referring to fig. 8, a first bearing sleeve 221 is disposed in the rotating base 220, the rotating end 250 of the station shaft rotatably penetrates through the first bearing sleeve 221, and a first cylindrical roller bearing 222 is disposed between the first bearing sleeve 221 and the rotating end 250.

The cylindrical roller bearing can effectively reduce the adverse effect of friction force and improve the measurement precision.

[ motion compensation structure for station axis ]

The tires produced lateral forces during testing due to the presence of the pitch and slip angles, which forces formed axial forces of the station axle. The force is a key parameter in a tire test, the force puts forward a strength requirement on an axial structure, the axial force is accurately measured to play a feedback protection function on the axial structure, and various friction influences need to be avoided as much as possible to accurately measure the axial force, so that the accuracy of data is ensured.

Based on this, this embodiment further provides a compensation motion structure of the station shaft, which can compensate the misalignment between the station shaft 200 and the axial force sensor 820 while satisfying the measurement function of the tilt angle and the slip angle of the station shaft, and accurately measure the axial force of the station shaft 200.

Specifically, referring to fig. 8, an end shell 230 is fixedly disposed outside the rotary base 220, and an installation space is defined between the end shell 230 and a side wall of the rotary base 220. The rotating end 250 of the station axle rotatably penetrates the rotary base 220 and has an extending end 251 extending out of the rotary base 220, and the extending end 251 is located in the end shell 230.

The end shell 230 is further internally provided with an axial force sensor 820 and an axial bearing part 810, the axial bearing part 810 is connected with the protruding end 251, and the axial bearing part 810 is used for bearing the axial force of the station shaft 200 and transmitting the axial force to the axial force sensor 820, so that the accurate measurement of the axial force is realized.

Regarding the specific structure of the end housing 230, in some embodiments of the present application, the end housing 230 includes an axial supporting flange 231 and an end connecting flange 232, one end of the axial supporting flange 231 is fixedly connected to the rotary base 220, the other end of the axial supporting flange is fixedly connected to the end connecting flange 232, the axial force sensor 820 is fixedly disposed on the end connecting flange 232, and the axial force sensor 820 faces the extending end 251 of the station axle.

With respect to the specific structure of the axial bearing 810, in some embodiments of the present application, it includes an axial bearing sleeve 811, an axial bearing flange 812, and an axial force transmitting portion.

The axial bearing sleeve 811 is fixedly disposed in the end shell 230, specifically, the axial bearing sleeve 811 is fixedly disposed on the axial support flange 231, the axial bearing flange 812 is fixedly disposed at an end portion of the axial support flange 231, and the protruding end 251 of the station axle extends into a space surrounded by the axial bearing sleeve 811 and the axial bearing flange 812.

A step structure is formed between the extending end 251 of the station shaft and the rotating end 250 of the station shaft, a bearing 813 is arranged between the extending end 251 and the axial bearing sleeve 811, one end of the bearing 813 is abutted against the step structure, and the other end is fixedly arranged on the extending end 251 by a locking nut.

The bearing 813 adopts a spherical thrust roller bearing and can bear larger axial force.

The axial force transmission part acts between the axial bearing flange 812 and the axial force sensor 820, when the tire generates an axial force, the axial force is mainly borne by the bearing 813, the bearing 813 transmits the axial force to the axial bearing sleeve 811 and the axial bearing flange 812 and then transmits the axial force to the axial force transmission part, and the axial force transmission part transmits the axial force to the axial force sensor 820, so that the real-time measurement of the axial force is realized.

The axial force bearing part consisting of the axial bearing sleeve 811, the axial bearing flange 812 and the axial force transmitting part can bear larger axial force, and force is transmitted through the bearing, so that the influence of friction force is reduced, and the measurement accuracy of the axial force is improved.

And three specific embodiments are given in the present application for the specific structure of the axial force transmitting portion.

The first axial force transmission unit is shown in fig. 8.

The axial force transmitting portion includes a first flange 814 and a second flange 815, the first flange 814 and the second flange 815 are fixedly connected by bolts, the first flange 814 is disposed between the axial bearing flange 812 and the protruding end 251, and the second flange 815 is disposed between the axial bearing flange 812 and the axial force sensor 820 and abuts against the axial force sensor 820. Gaps are respectively arranged between the first flange 814 and the axial bearing flange 812 and between the second flange 815 and the axial bearing flange 812.

When the tire generates a leftward axial force (in the direction shown in the figure), the tire drives the station shaft 200 to generate a leftward movement tendency, the cylindrical roller bearings on the station shaft moving end 240 and the rotating end 250 can move freely left and right, the roller resistance is small, the leftward acting force of the tire is mainly borne by the bearing 813, acts on the second flange 815 through the axial bearing sleeve 811 and the axial bearing flange 812, and then acts on the axial force sensor 820, so that the measurement of the axial force is realized.

When the tire generates a rightward axial force, the tire drives the station shaft 200 to generate a rightward movement tendency, and the acting force is mainly borne by the bearing 813, acts on the first flange 814 through the axial bearing sleeve 811 and the axial bearing flange 812, and acts on the axial force sensor 820 through the second flange 815, so that the measurement of the axial force is realized.

Radial and flexibility compensation is achieved by the clearances between the first flange 814, the second flange 815 and the axial load flange 812.

The second axial force transmission unit is shown in fig. 9.

The axial force transfer portion includes a first flange 814, a second flange 815, and a spherical flange 816.

The first flange 814 is fixedly connected to the second flange 815 by bolts, the first flange 814 is disposed between the axial bearing flange 812 and the protruding end 251, and the second flange 815 is disposed between the axial bearing flange 812 and the axial force sensor 820. Gaps are respectively arranged between the first flange 814 and the axial bearing flange 812 and between the second flange 815 and the axial bearing flange 812.

The spherical flange 818 is rotatably disposed in the first flange 814 and the second flange 815, and one end of the spherical flange 816 abuts against the axial force sensor 820.

In order to improve the structural reliability, further, one end of the spherical flange 816 is fixedly provided with a first mounting seat 821 through bolts, and the first mounting seat 821 abuts against the axial force sensor 820.

When the tire generates a leftward axial force (in the direction shown in the figure), the tire drives the station shaft 200 to generate a leftward movement trend, the cylindrical roller bearings on the station shaft moving end 240 and the rotating end 250 can move freely left and right, the roller resistance is small, the leftward acting force of the tire is mainly borne by the bearing 813, acts on the second flange 815 through the axial bearing sleeve 811 and the axial bearing flange 812, and then acts on the axial force sensor 820 through the spherical flange 816 and the first mounting seat 821, so that the measurement of the axial force is realized.

When the tire generates a rightward axial force, the tire drives the station shaft 200 to generate a rightward movement tendency, the acting force is mainly borne by the bearing 813, acts on the first flange 814 through the axial bearing sleeve 811 and the axial bearing flange 812, and acts on the axial force sensor 820 through the second flange 815, the spherical flange 816 and the first mounting seat 821, so that the measurement of the axial force is realized.

By the provision of the spherical flange 816, radial compensation is achieved by the clearance between the first flange 814, the second flange 815 and the axial load flange 812, while flexibility compensation is achieved by the spherical surfaces between the first flange 814, the second flange 815 and the spherical flange 816.

The third axial force transmission unit is shown in fig. 10 to 12.

The axial force transfer portion includes a toothed sleeve 817, a toothed spherical flange 818, and a second mount 822.

The toothed sleeve 817 is fixedly arranged on the axial bearing flange 812 through bolts, the toothed spherical flange 818 is arranged in a space surrounded by the toothed sleeve 817 and the axial bearing flange 812, a toothed structure of the toothed spherical flange 818 extends out of a circumferential gap of the toothed sleeve 817 and is fixedly connected with the second mounting seat 822 through bolts, and one side of the second mounting seat 822 abuts against the axial force sensor 820.

The transmission of axial force is substantially the same as in the above two configurations and will not be described in detail. The contact between the toothed spherical flange 818 and the toothed sleeve 817 and the axial bearing flange 812 is spherical for flexibility compensation during rotation of the station shaft 200, while radial compensation is achieved by the radial clearance between the toothed spherical flange 818 and the toothed sleeve 817.

[ Loading part ]

Referring to fig. 1, the loading unit 300 includes a cylinder base 320 and a hydraulic cylinder (denoted as a third hydraulic cylinder 310), the cylinder base 320 is fixedly disposed on the fixed frame 110, a cylinder body of the third hydraulic cylinder 310 is fixedly disposed on the cylinder base 320, and a piston rod of the third hydraulic cylinder 310 (i.e., a power output end of the loading unit) is connected to the first support frame 121 on the first frame 120, and drives the first frame 120 to move toward a direction close to or away from the rotating drum 410.

The first support frame 121 is connected to the power output end of the loading part 300 through a loading connection device 700.

Referring to fig. 12 and 13, the loading connector 700 includes a force sensor 710, one side of the force sensor 710 is fixedly connected to the power output end of the loading unit 300 through a connecting flange 720, the other side of the force sensor 710 is fixedly provided with a force sensor fixing base 730, the force sensor fixing base 730 is connected to a joint bearing base 760 through a joint shaft 750 and a joint bearing 740, and the joint bearing base 760 is fixedly connected to the first support frame 121, so that the loading unit 300 is connected to the first frame 120.

The joint bearing block 760 and the force sensor fixing base 730 are directly connected with the joint bearing 740 through the joint shaft 750, the joint bearing 740 can perform angle compensation in the horizontal and vertical directions, the non-parallelism error between the loading force direction and the sliding direction of the first frame 120 is effectively eliminated, and the service life of the device is prolonged.

The loading force is transmitted through the spherical surface, the stress is uniform, the pressure on the spherical surface is small, the stress concentration is small, the spherical surface is not easy to crush, and the service life is prolonged.

The spherical plain bearing 740 may be an oilless spherical plain bearing or a rolling spherical plain bearing.

[ Drum part ]

Referring to fig. 14, the drum part 400 further includes a drum driving motor 420, the drum driving motor 420 is fixedly disposed on the fixed frame 110, a power output end of the drum driving motor 420 is connected to a gear 430, a gear ring 440 is disposed on the drum 410 along a circumferential direction thereof, and the gear 430 is engaged with an inner circumference of the gear ring 440.

The speed reduction transmission device formed by the rotary drum driving motor 420, the gear 430 and the gear ring 440 is compact in structure, low in cost and high in modularization degree.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A tire testing machine comprising:

a drum part including a drum;

a station axis for mounting a tire to be tested;

characterized in that, the testing machine still includes:

2. The tire testing machine according to claim 1,

the sliding angle functional system comprises a rack and a sliding angle driving assembly, the station shaft is arranged on the rack, the sliding angle driving assembly is used for driving the rack to rotate, and the rotating axis of the rack extends along the horizontal direction.

3. The tire testing machine according to claim 2,

the sliding angle driving assembly comprises a sliding angle driving part, the sliding angle driving part is rotationally connected with a base of the tire testing machine, and a power output end of the sliding angle driving part is hinged with the rack;

4. The tire testing machine according to claim 2,

the sliding angle function system further comprises a sliding angle detection device for detecting the rotation angle of the rack.

5. The tire testing machine according to claim 2,

the inclination angle functional system comprises an inclination angle driving assembly, wherein the inclination angle driving assembly is used for driving the moving end of the station shaft to move back and forth relative to the rotary drum and driving the rotating end of the station shaft to rotate in situ, and the rotating axis of the rotating end extends along the vertical direction.

6. The tire testing machine according to claim 5,

the inclination driving assembly comprises an inclination driving part, a moving seat and a rotating seat, the moving end of the station shaft is connected with the moving seat, and the rotating end of the station shaft is connected with the rotating seat;

7. The tire testing machine according to claim 6,

the inclination angle driving assembly further comprises an inclination angle detection device for detecting the rotation angle of the rotating seat;

8. The tire testing machine according to claim 6,

the rotary seat is internally provided with a bearing sleeve, the rotating end of the station shaft is rotatably arranged in the bearing sleeve in a penetrating mode and provided with an extending end extending out of the rotary seat, and one side of the extending end is provided with an axial force sensor used for detecting the axial force of the station shaft.

9. The tire testing machine according to claim 8,

the rotary seat is provided with an end shell, the extending end extends into the end shell, the end shell is internally provided with the axial force sensor and an axial bearing part, the axial bearing part is connected with the extending end, and the axial bearing part is used for bearing the axial force of the station shaft and transmitting the axial force to the axial force sensor.

10. The tire testing machine according to any one of claims 1 to 9,

the drum rotating part further comprises a drum driving motor, the power output end of the drum driving motor is connected with a gear, a gear ring is arranged on the drum along the circumferential direction of the drum, and the gear is meshed with the inner circumference of the gear ring.