CN116429456A - Tire traction performance testing machine - Google Patents

Abstract

The invention discloses a tire traction performance testing machine, wherein a tire to be tested is mounted on a moving main body, a base is arranged below the moving main body, the moving main body is in sliding connection with the base, a soil groove is arranged at the side of the base and extends along the length direction of the base, the soil groove is arranged below the tire to be tested, a rotary driving part is arranged on the moving main body and used for driving the tire to rotate, the rotary driving part comprises a driving shaft and a rotary driving motor, one end of the driving shaft is connected with the tire to be tested, the other end of the driving shaft is connected with a first coupler, the rotary driving motor is connected with a second coupler, the first coupler is connected with the second coupler through a torque sensor, an angle encoder is arranged on the rotary driving motor, the traction part is used for providing traction force for the moving main body, and the displacement sensor is used for detecting the moving distance of the moving main body. The testing machine automatically judges whether the tire slips or not by collecting the rotation angle, the driving torque and the displacement of the tire during the movement.

Description

Tire traction performance testing machine

Technical Field

The invention relates to the technical field of tire tests, in particular to a tire traction performance testing machine.

Background

The traditional mechanical tire traction performance test mainly tests the tire mounted on the vehicle, the sensor is difficult to mount by the mode, the tire is inconvenient to replace, and the verification period is long. The conventional test cannot accurately and rapidly measure the values of the vertical acting force, the driving torque, the traction force, the angular velocity, the travelling speed and the like of the tire on the ground.

In order to solve the problems of inconvenient tire replacement, long test period and the like caused by mounting a tire to be tested on a vehicle for testing, the applicant thinks to provide a set of indoor test device for testing the tire indoors. In the tire indoor traction performance test, the tire walks in different soils, and it is important to measure the maximum traction of the tire, which occurs at the tire slip instant. The maximum traction value at this time is required to be acquired when the tire is instantaneously slipped. In the prior art, the skid condition of the tire is judged by adopting a manual observation mode, and the running state change of the tire on the ground is instantaneous, so the manual observation mode is obviously inaccurate.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems pointed out in the background art, the invention provides a tire traction performance testing machine for realizing the indoor traction performance test of a tire, and automatically judging whether the tire slips or not by collecting the rotation angle, the driving torque and the displacement of the tire during the movement.

In order to achieve the aim of the invention, the invention is realized by adopting the following technical scheme:

the invention provides a tire traction performance testing machine, comprising:

a moving body on which a tire to be tested is mounted;

the base is arranged below the movable body, the movable body is connected with the base in a sliding manner, and the movable body moves along the length direction of the base;

the soil groove is used for containing soil, is arranged at the side of the base and extends along the length direction of the base, and is positioned below the tire to be tested;

the rotary driving part is arranged on the moving body and used for driving the tire to rotate in the soil groove, the rotary driving part comprises a driving shaft and a rotary driving motor, one end of the driving shaft is connected with the tire to be tested, the other end of the driving shaft is connected with a first coupler, the rotary driving motor is connected with a second coupler, the first coupler is connected with the second coupler through a torque sensor, the torque sensor is used for measuring the driving torque of the tire, an angle encoder is arranged on the rotary driving motor, and the angle encoder is used for measuring the rotation angle of the tire;

a traction part connected to the moving body for providing traction to the moving body;

a displacement sensor for detecting a moving distance of the moving body;

and when the rotation angle measured by the angle encoder is larger than a set value, the displacement sensor does not feed back a displacement value, and the driving torque value measured by the torque sensor suddenly decreases, the system judges that the tire slips.

In some embodiments of the present application, the moving body includes a main frame and a case, the case is disposed in the main frame, the case is provided with a rotation driving part, the main frame is slidably connected with the base, and the main frame moves along a length direction of the base.

In some embodiments of the present application, the rotary driving motor is located in the outside of the box, the rotary driving motor is connected with the second coupling through a speed reducer, the speed reducer is disposed on the side wall of the box, and the first coupling, the second coupling, and the torque sensor are disposed in the inner cavity of the box.

In some embodiments of the present application, one end of the box is provided with a connecting plate, the circumferential edge profile of the connecting plate extends out of the box, the driving shaft is fixedly mounted on the connecting plate through a support bearing, and the driving shaft extends out of the outer side of the connecting plate to be connected with a tire to be tested.

In some embodiments of the present application, the end of the drive shaft is provided with a connection disc, which is connected to the rim of the tire.

In some embodiments of the present application, the variable resistance slide rail of the displacement sensor is disposed on the base and extends along the length direction of the base, an extension plate is disposed at the bottom of the main frame, the extension plate is located on the outer side of the variable resistance slide rail, and the sliding sheet of the displacement sensor is disposed on the extension plate.

In some embodiments of the present application, the main frame includes four relatively arranged stand, four the top of stand is connected gradually through the top crossbeam, four the bottom of stand is connected gradually through the bottom crossbeam, four the bottom of stand is equipped with the bottom plate, the bottom plate with base sliding connection, the box with the stand is connected, adjacent two form the clearance between the stand, four are located to the box in the space enclosed by the stand, rotary driving motor with the tire divides to locate the opposite both sides of box, and be located the outside of main frame.

In some embodiments of the present application, the traction portion includes traction driving motor, traction driving motor's power take off end is equipped with the cylinder, twine haulage rope on the cylinder, be equipped with force sensor on the mobile body, the one end of haulage rope with force sensor connects.

In some embodiments of the present application, the soil bin is detachably connected to the base.

In some embodiments of the present application, the soil tank is made of a transparent material.

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

in the tire traction performance testing machine disclosed by the application, the driving torque of the tire is detected through the torque sensor, the rotation angle of the tire is detected through the angle encoder, the moving distance of the tire is detected through the displacement sensor, and when the rotation angle detected by the angle encoder is larger than a set value, the displacement sensor does not feed back a displacement value and the driving torque value detected by the torque sensor suddenly drops, the system judges that the tire slips. Compared with the artificial observation means in the prior art, the automatic slip judgment mode of the scheme is more accurate, and more accurate data is provided for the test.

Other features and advantages of the present invention will become apparent upon review of the detailed description of the invention in conjunction with the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a tire traction performance testing machine according to an embodiment;

FIG. 2 is a schematic view of the structure of FIG. 1, as viewed from Q1;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is a cross-sectional view of a tire traction performance testing machine along a rotary drive section according to an embodiment;

fig. 5 is a schematic structural view of a moving body, a rotary driving part, a radial driving part according to an embodiment;

FIG. 6 is a schematic view of the structure of FIG. 5, as viewed from Q2;

fig. 7 is a schematic structural view of a moving body, a radial driving part according to an embodiment;

FIG. 8 is a schematic view of the structure of FIG. 7, as viewed from Q3;

fig. 9 is a schematic structural view of a main frame according to an embodiment;

FIG. 10 is a schematic view of the structure of FIG. 9, as viewed from Q4;

FIG. 11 is a schematic view of the structure of the case, drive shaft, and tire to be tested;

reference numerals:

10-tyre;

100-moving a body;

110-main frame, 111-upright, 112-top beam, 113-bottom beam, 114-top plate, 1141-second opening, 115-bottom plate, 116-slider, 117-first sliding part;

120-a box body, 121-a connecting plate, 122-a second sliding part, 123-a reinforcing rib, 124-a mounting seat and 1241-a first opening;

200-radial driving part, 210-radial driving motor, 220-lifter, 230-first force sensor;

300-rotation driving part, 310-driving shaft, 320-rotation driving motor, 330-first speed reducer, 340-first coupling, 350-second coupling, 360-torque sensor, 370-angle encoder, 380-support bearing, 390-connecting disc;

400-traction part, 410-traction driving motor, 420-second speed reducer, 430-roller, 440-traction rope, 450-second force sensor;

500-displacement sensor, 510-variable resistance slide rail, 520-slide sheet;

600-base, 610-slide rail;

700-soil tank;

800-timer.

Description of the embodiments

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The embodiment discloses a tire traction performance testing machine which is used for testing the indoor traction performance of tires, in particular to the indoor traction performance of agricultural machinery tires. The testing machine has a testing station for mounting a tire for testing.

Referring to fig. 1 to 6, the testing machine mainly includes a moving body 100, a base 600, a soil tank 700, a rotation driving part 300, a traction part 400, a displacement sensor 500, and the like.

The tire 10 to be tested is mounted on the moving body 100.

The bottom 600 is disposed below the moving body 100, the base 600 is of a strip structure, the moving body 100 is slidably connected to the base 600, and the moving body 100 moves along the length direction of the base 600.

The soil groove 700 is also a strip-shaped structure for containing soil, the soil groove 700 is arranged beside the base 600 and extends along the length direction of the base 600, and the soil groove 700 is positioned below the tyre 10 to be tested.

The rotation driving part 300 is provided on the moving body 100, and the rotation driving part 300 is connected to the tire 10 to be tested for driving the tire 10 to rotate. By rotating the driving part 300, torque is applied to the tire 10, so that the tire can advance in the soil tank 700.

Referring to fig. 4, the specific structure of the rotary driving part 300 includes a driving shaft 310 and a rotary driving motor 320, one end of the driving shaft 310 is connected with the tire 10 to be tested, the other end is connected with a first coupling 340, the rotary driving motor 320 is connected with a second coupling 350, the first coupling 340 is connected with the second coupling 350 through a torque sensor 360, the torque sensor 360 is used for measuring the driving torque of the tire 10, an angle encoder 370 is arranged on the rotary driving motor 320, and the angle encoder 370 is used for measuring the rotation angle of the tire.

The traction part 400 serves to provide traction to the moving body 100. By means of the traction portion 400, it is achieved that a horizontal load is applied to the tyre 10, so that the tyre traction remains constant, i.e. the load remains constant during dynamic operation of the tyre.

The displacement sensor 500 is used to detect a moving distance of the moving body 100. From the measurement of the moving distance of the moving body 100 in the time T, the advancing speed of the tire 10 can be obtained.

In the tire indoor traction performance test, the tire walks in different soils, and it is important to measure the maximum traction of the tire, which occurs at the tire slip instant. The maximum traction value at this time is required to be acquired when the tire is instantaneously slipped. In the prior art, the skid condition of the tire is judged by adopting a manual observation mode, and the running state change of the tire on the ground is instantaneous, so the manual observation mode is obviously inaccurate.

The testing machine detects the driving torque of the tire through the torque sensor 360, detects the rotation angle of the tire through the angle encoder 370, detects the moving distance of the tire through the displacement sensor 500, and when the rotation angle detected by the angle encoder 370 is larger than a set value, the displacement sensor 500 does not feed back a displacement value, and the driving torque value detected by the torque sensor 360 suddenly drops in test, the system judges that the tire slips.

Compared with the manual observation means in the prior art, the automatic slip judgment mode of the scheme is more accurate, can rapidly and accurately judge whether the tire slips, and provides more accurate data for the test.

In some embodiments of the present application, the moving body 100 includes a main frame 110 and a case 120. The main frame 110 has a frame structure, referring to fig. 9 and 10. Referring to fig. 9, the case 120 is slidably coupled to the main frame 110, and the case 120 moves in a vertical direction along the main frame 110.

The rotation driving part 300 is specifically mounted on the case 120, the main frame 110 is slidably connected to the base 600, the displacement sensor 500 is used to measure the moving distance of the main frame 110, and the traction part 400 actually provides traction force to the main frame 110.

In some embodiments of the present application, the testing machine further comprises a radial drive 200.

The radial driving part 200 is connected to the case 120 through a force sensor (denoted as a first force sensor 230), and the radial driving part 200 is used to drive the case 120 to move in a vertical direction.

The radial driving portion 200 applies a radial load to the tire 10. Real-time measurement and control of radial load is achieved by the first force sensor 230.

The tester can drive the tyre to be tested to plough and walk on the soil pavement, apply radial load and apply horizontal load to make the tyre to be tested travel in a traction working state. The applied radial and horizontal loads are not affected interactively and can be adjusted and controlled independently, in which case slip and interaction between the tire and the ground occurs, creating traction in the direction of travel.

The tires were run on soil pavements of different formulations (humidity, hardness) and different traction forces were measured. Tires of different design parameters may produce different traction under the same soil conditions. And simultaneously, the vertical acting force (namely radial load) of the tire on the soil surface, driving torque, traction force, angular velocity, travelling speed and the like are measured. And calculating traction coefficients, slip rate and traction efficiency of each measuring point, finally obtaining a traction performance test result of the test tire through data processing, and drawing a tire traction performance curve.

The testing machine applies radial load to the tire through the radial driving part 200, and realizes real-time measurement and control of the radial load through the first force sensor 230; the rotation driving part 300 applies torque to the tire, the torque sensor 360 measures the driving torque of the tire, and the angle encoder 370 measures the rotation angle of the tire; applying a horizontal load to the tire by the traction part 400, so that the horizontal load of the tire is kept constant during dynamic running; the advancing speed of the tire is measured by the displacement sensor 500.

Each functional module is compact in layout, realizes simultaneous and real-time measurement of a plurality of parameters, can conveniently and accurately measure each performance index of the tire, ensures repeatability and accuracy of test results, rapidly provides accurate verification data for development, optimization and improvement of the tire, and greatly shortens the development period of the tire.

The soil tank 700 is designed to be of an independent structure, so that the soil can be quickly replaced, and performance comparison tests of different tires under the same soil condition are ensured.

The radial driving portion 200 is described in detail below.

In some embodiments of the present application, referring to fig. 7 and 8, the radial driving part 200 includes a lifter 220 and a radial driving motor 210, one end of the lifter 220 is connected to the case 120 through a first force sensor 230, and the other end is connected to the radial driving motor 210. The radial drive motor 210 is activated to cause the elevator 220 to drive the housing 120 in a vertical direction, thereby effecting downward movement of the tire to contact the soil or upward movement to disengage the soil.

In some embodiments of the present application, the lifter 220 is disposed above the case 120, the top of the case 120 is provided with a first force sensor 230, and the radial driving motor 210 is disposed at the top of the main frame 110.

Because the base 600 is arranged at the bottom of the main frame 110, the radial driving motor 210 is arranged at the top, the top space of the box 120 and the main frame 110 is fully provided, the whole structure is more compact, and the mounting position of the tire is lower due to the arrangement, so that the tire can be conveniently dismounted.

In some embodiments of the present application, an installation space is formed in the main frame, and the box body is arranged in the installation space, so that the assembled structure of the main frame and the box body is more compact, and the whole machine is small in size.

A radial drive motor 210 is provided at the top of the main frame 110, and an elevator 220 extends downward through the top of the main frame 210 to be connected with a first force sensor 230.

In some embodiments of the present application, referring to fig. 5, a mounting seat 124 is disposed at a top of the case 120, a first force sensor 230 is disposed in a space surrounded by the mounting seat 124, an opening (denoted as a first opening 1241) is disposed at a top of the mounting seat 124, and the lifter 220 passes through the first opening 1241 to be connected with the first force sensor 230.

The mounting 124 provides a separate mounting space for the first force sensor 230 and the first aperture 1241 provides a motion guiding function for the elevator 220.

In some embodiments of the present application, a first sliding portion 117 is disposed on the main frame 110, a second sliding portion 122 is disposed on the case 120, and the first sliding portion 117 is slidably connected with the second sliding portion 122, so as to realize sliding connection between the case 120 and the main frame 110.

For example, the first sliding portion 117 is a sliding rail extending along a vertical direction, and the second sliding portion 122 is a sliding block slidably disposed on the sliding rail.

The rotation driving section 300 will be described in further detail below.

In some embodiments of the present application, referring to fig. 4, a first coupling 340, a second coupling 350, and a torque sensor 360 are disposed in an inner cavity of the case 120, the rotary driving motor 320 is connected to the second coupling 350 through a speed reducer (denoted as a first speed reducer 320), the first speed reducer 330 is disposed on one end wall of the case 120, a driving shaft 310 is mounted on the other end wall of the case 120 through a support bearing 380, and the driving shaft 310 extends out of the case 120 so as to be connected to the tire 10.

The rotary driving motor 320 is arranged on one side of the main frame 110, the tire 10 is arranged on the other side of the main frame 110, and the rotary driving motor 320 and the tire 10 are both arranged on the outer side of the main frame 110, so that the main body part of the main frame 120 is arranged in the inner cavity of the main frame 110, the structure is compact, the box 120 can move up and down along the main frame 110 conveniently, the rotary driving motor 320 and the tire 10 are large in size, the rotary driving motor 320 and the tire 10 are arranged on the outer side of the main frame 110 externally, the tire 10 can be disassembled conveniently, and compact assembly between the main frame 110 and the box 120 cannot be influenced.

In some embodiments of the present application, the end of the drive shaft 310 is provided with a connection pad 390, and the connection pad 390 is connected to the rim of the tire 10 by bolts, so as to facilitate the replacement of the tire.

The tire advance speed detection system is described in detail below.

In some embodiments of the present application, referring to fig. 2, a variable resistance slide rail 510 of a displacement sensor 500 is disposed on a base 600 and extends along a length direction of the base 600, and a slide sheet 520 of the displacement sensor 500 is disposed at a bottom of a main frame 110. When the main frame 110 moves along the base 600, the sliding piece 520 is driven to move along the length direction of the variable resistance sliding rail 510, so as to measure the advancing speed.

In some embodiments of the present application, an extension board (not labeled) is disposed at the bottom of the main frame 110, the extension board is located at the outer side of the variable resistor sliding rail 510, and the sliding sheet 520 of the displacement sensor is disposed on the extension board, so as to facilitate the installation of the sliding sheet 520.

The variable resistance sliding rail 510 and the sliding vane 520 are positioned on one side of the base 600, the soil groove 700 is positioned on the other side of the base 600, the installation is not interfered with each other, and the variable resistance sliding rail 510 and the sliding vane 520 are positioned below the main frame 110, so that the sliding between the main frame 110 and the base 600 is not influenced.

In some embodiments of the present application, a timer 800 is further provided on the main frame 110 for measuring the movement time of the tire 10, and the speed can be calculated according to the displacement and the time.

The traction portion 400 is described in detail below.

In some embodiments of the present application, referring to fig. 1 and 3, the traction portion 400 includes a traction driving motor 410, a drum 430 is disposed at a power output end of the traction driving motor 410, specifically, the power output end of the traction driving motor 410 is connected with the drum 430 through a speed reducer (denoted as a second speed reducer 420), a traction rope 440 is wound on the drum 430, a second force sensor 450 is disposed on the main frame 110, one end of the traction rope 440 is connected with the second force sensor 450, and the second force sensor 450 is used for measuring traction in real time.

The traction drive motor 410 is started to drive the drum 430 to rotate, and the traction ropes 440 are tightened or released at a constant speed. In the test, the tire 10 is advanced at a constant speed by the rotation driving part 300, and the traction part 400 releases the traction rope 440 at a constant speed, so that the traction force is kept constant, i.e., the load of the tire is kept constant during the dynamic running.

In some embodiments of the present application, traction drive motor 410 and drum 430 are disposed at one end of base 600 to facilitate movement of main frame 110 from one end of base 600 to the other to allow a sufficiently long travel distance for a tire.

In some embodiments of the present application, a set of in-place travel switches are provided on the base 600, and when the tire is retracted, the bump touches the travel switches, and the station stops retracting.

In some embodiments of the present application, the testing machine is provided with a mechanical stop iron near the base 600 as final protection, and can prevent collision after failure of electrical control, thereby providing more reasonable safety guarantee for the testing process of tires.

Soil tank 700 is described in detail below.

In some embodiments of the application, soil groove 700 is provided with equipment, and soil groove 700 can be dismantled with base 600 and be connected, the change of soil groove 700 of being convenient for, the convenient soil of changing to satisfy different experimental demands.

The soil tank 700 is connected with the base 600 by a screw or is connected with the base 600 by a mechanical structure such as a clamping connection, a plugging connection, etc.

In some embodiments of the present application, soil tank 700 is made of a transparent material to facilitate observation of changes in soil within soil tank 700 during testing.

The main frame 110 is described in detail below.

In some embodiments of the present application, referring to fig. 9 and 10, main frame 110 includes four opposite upright posts 111, the tops of four upright posts 111 are sequentially connected through top beams 111, the bottoms of four upright posts 111 are sequentially connected through bottom beams 113, top plates 114 are provided at the tops of four upright posts 111, and bottom plates 115 are provided at the bottoms. Four posts 111, top plate 113, and bottom plate 114 enclose a hollow frame structure.

The main body portion of the case 120 is located in the inner cavity of the main frame 110, and opposite ends of the case 120 protrude from the gap between the adjacent two columns 111 of the main frame 110 for mounting the rotary driving motor 320 and the tire 10.

The top plate 113 is provided with a second opening 1141 through which the lifter 220 passes.

In some embodiments of the present application, referring to fig. 10, a slider 116 is disposed at the bottom of the bottom plate 115, and referring to fig. 1, a slide rail 610 is correspondingly disposed on the base 600, and the slider 116 is slidably connected with the slide rail 610, so as to realize sliding connection between the main frame 110 and the base 600.

In some embodiments of the present application, referring to fig. 2, the second force sensor 450 is disposed on the bottom beam 113, and the traction portion 400 applies traction to the bottom beam 113, which helps to improve structural reliability due to the strong structural strength of the bottom beam 113.

The case 120 is described in detail below.

In some embodiments of the present application, referring to fig. 6 and 11, one end of the box 120 is provided with a connecting plate 121, a circumferential edge contour of the connecting plate 121 extends out of the box 120, a second sliding portion 122 is provided on the connecting plate 121, a first sliding portion 117 is correspondingly provided on an outer side of the upright 111, and sliding connection between the box 120 and the main frame 110 is achieved through sliding connection between the connecting plate 121 and the upright 111.

In some embodiments of the present application, referring to fig. 4, the driving shaft 310 is fixedly mounted on the connection plate 121 through the support bearing 390, thereby achieving the fixed mounting of the driving shaft 310 on the housing 120. The driving shaft 310 protrudes to the outside of the connection plate 121 to be connected with the tire 10.

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

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. A tire traction performance testing machine, comprising:

a moving body on which a tire to be tested is mounted;

the base is arranged below the movable body, the movable body is connected with the base in a sliding manner, and the movable body moves along the length direction of the base;

the soil groove is used for containing soil, is arranged at the side of the base and extends along the length direction of the base, and is positioned below the tire to be tested;

the rotary driving part is arranged on the moving body and used for driving the tire to rotate in the soil groove, the rotary driving part comprises a driving shaft and a rotary driving motor, one end of the driving shaft is connected with the tire to be tested, the other end of the driving shaft is connected with a first coupler, the rotary driving motor is connected with a second coupler, the first coupler is connected with the second coupler through a torque sensor, the torque sensor is used for measuring the driving torque of the tire, an angle encoder is arranged on the rotary driving motor, and the angle encoder is used for measuring the rotation angle of the tire;

a traction part connected to the moving body for providing traction to the moving body;

a displacement sensor for detecting a moving distance of the moving body;

and when the rotation angle measured by the angle encoder is larger than a set value, the displacement sensor does not feed back a displacement value, and the driving torque value measured by the torque sensor suddenly decreases, the system judges that the tire slips.

2. The tire traction performance testing machine of claim 1, wherein,

the movable main body comprises a main frame and a box body, wherein the box body is arranged in the main frame, the box body is provided with a rotary driving part, the main frame is in sliding connection with the base, and the main frame moves along the length direction of the base.

3. The tire traction performance testing machine of claim 2, wherein,

the rotary driving motor is located outside the box, the rotary driving motor is connected with the second coupler through a speed reducer, the speed reducer is arranged on the side wall of the box, and the first coupler, the second coupler and the torque sensor are arranged in the inner cavity of the box.

4. A tire traction performance testing machine according to claim 3, wherein,

one end of the box body is provided with a connecting plate, the circumferential edge contour of the connecting plate extends out of the box body, the driving shaft is fixedly installed on the connecting plate through a supporting bearing, and the driving shaft extends out of the outer side of the connecting plate to be connected with a tire to be tested.

5. A tire traction performance testing machine according to claim 3, wherein,

the end of the driving shaft is provided with a connecting disc, and the connecting disc is connected with the rim of the tire.

6. The tire traction performance testing machine of claim 2, wherein,

the variable resistance sliding rail of the displacement sensor is arranged on the base and extends along the length direction of the base, an extension plate is arranged at the bottom of the main frame and is positioned at the outer side of the variable resistance sliding rail, and the sliding sheet of the displacement sensor is arranged on the extension plate.

7. The tire traction performance testing machine of claim 2, wherein,

the main frame includes four relative stands that set up, four the top of stand is connected gradually through the top crossbeam, four the bottom of stand is connected gradually through the bottom crossbeam, four the bottom of stand is equipped with the bottom plate, the bottom plate with base sliding connection, the box with the stand is connected, adjacent two form the clearance between the stand, the box is located four in the space enclosed by the stand, rotation driving motor with the tire divide to locate the relative both sides of box, and be located the outside of main frame.

8. The tire traction performance testing machine according to any one of claims 1-7, wherein,

the traction part comprises a traction driving motor, a roller is arranged at the power output end of the traction driving motor, a traction rope is wound on the roller, a force sensor is arranged on the moving main body, and one end of the traction rope is connected with the force sensor.

9. The tire traction performance testing machine according to any one of claims 1-7, wherein,

the soil tank is detachably connected with the base.

10. The tire traction performance testing machine of claim 9, wherein,

the soil tank is made of transparent material.

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