CN208488267U - A kind of tire rolling resistance coefficient determination experimental rig - Google Patents

Abstract

The utility model discloses a kind of tires to roll resistance coefficient determination experimental rig, comprising: for the straight road surface template with test tire interface, the surface of road surface template is equipped with the adhesive layer being consistent with practical road surface material；For being arranged the workbench of road surface template, workbench by pull pressure sensor be used to that the template driving device of movable workbench to be driven to be connected；For test tire to be arranged and applies default normal pressure to it, so that test tire compresses the tire loading mechanism of road surface template.The surface of the road surface template of tire rolling resistance coefficient determination experimental rig is equipped with the adhesive layer being consistent with practical road surface material, can measure practical rolling resistance coefficient of the tire on true road surface, and measurement result is truer, reliable.Further, pull pressure sensor compared with the prior art in wheel shaft with sensor price inexpensively, and experimental rig structure is simple, it is relatively low to require working environment and structure precision, and therefore, cost is relatively low.

Description

A kind of tire rolling resistance coefficient determination experimental rig

Technical field

The utility model relates to tire-testing equipment technical fields, roll resistance coefficient more specifically to a kind of tire and survey Determine experimental rig.

Background technique

In the prior art, the coefficient of rolling resistance of dynamometry measurement inflated rubber tire, referred to as rolling resistance coefficient are generallyd use, The ratio of normal pressure suffered by rolling resistance and tire of the definition of rolling resistance coefficient for tire.

Existing dynamometry experimental rig mainly has testing drum device peace tape test set two types.Testing drum Device generally includes pressurizing cylinder, test tire, force snesor, roller and driving motor, and diameter of cylinder is greater than test tire Outer diameter or internal diameter less than test tire, when test, are mounted on drum inner surface or outer surface for test tire, and pass through pressurization Oil cylinder is pressed on tire is tested on roller, and then starts driving motor, so that driving motor is driven roller rotation, and then make roller By frictional force band dynamic test tyre rotation, when test tire is rotated with constant speed, reading is mounted on test tire wheel shaft On force snesor measured by wheel axle power, the positive pressure that rolling resistance including horizontal direction and vertical direction pressurizing cylinder apply The rolling that test tire can be obtained in the ratio that power, rolling resistance and pressurizing cylinder apply normal pressure after amendment hinders coefficient.It is flat Ring steel belt is set in two synchronizing wheels by tape test set, rolls test tire on ring steel belt, test philosophy It is identical as the test philosophy of testing drum device, roller is only changed to ring steel belt and guarantees that tire is to roll in the plane with this Dynamic.

However, testing drum device uses roller as simulated roadway, diameter of cylinder bring will be introduced and correct error, and And the error is as brought by the structure feature of roller itself, is currently that can not overcome, although can be rolled by increasing The diameter of cylinder simulates plane road surface as far as possible, reduces the error, repairs as brought by diameter of cylinder however, can not eliminate Positive error, and when the diameter of roller is made larger, the whole occupied space of testing drum device is larger.

For flat rubber belting test device, although opposing roller test device eliminates diameter of cylinder bring amendment error, But due to the design feature of ring steel belt itself, keep deflection of the ring steel belt at its contact point with tire larger, to survey Amount result has larger impact, and error is big, and the error as brought by the deformation of ring steel belt is ring steel belt self character institute Caused by, it can not overcome at present.

Most of all, roller and ring steel belt is respectively adopted as simulation road in testing drum device peace tape test set Face, actual measurement is tire and the intermetallic rolling resistance coefficient for constituting roller or ring steel belt, rather than tire and practical road Rolling between face hinders coefficient, and error is larger, and therefore, thus obtained measurement result reference significance is simultaneously little.

Further, in order to make up the introduced error of roller and ring steel belt itself design feature, usually roller is surveyed Trial assembly set peaceful tape test set working environment and itself required precision it is very high, also compare in the selection of load cell It is special, cause production cost higher.

It is current in conclusion how to provide a kind of error small and at low cost tire rolling resistance coefficient determination experimental rig Those skilled in the art's urgent problem to be solved.

Utility model content

In view of this, the purpose of the utility model is to provide a kind of tires to roll resistance coefficient determination experimental rig, tire rolling The measurement error for hindering coefficient determination experimental rig is small and at low cost.

To achieve the goals above, the utility model provides the following technical solutions:

A kind of tire rolling resistance coefficient determination experimental rig, comprising:

For the straight road surface template with test tire interface, the surface of the road surface template is equipped with and practical road surface material The adhesive layer that matter is consistent；

For the workbench of the road surface template to be arranged, the workbench is described by pull pressure sensor and for driving The template driving device of movable workbench is connected；

For the test tire to be arranged and applies default normal pressure to it, so that the test tire compresses the road surface The tire loading mechanism of template.

Preferably, the tire loading mechanism includes:

For compressing the bearing plate of the test tire；

It is folded to be located at several on bearing plate pouring weights with preset quality.

Preferably, the bottom of the bearing plate is installed with test wheel mounting base, and the test wheel mounting base, which is equipped with, to be used for Be arranged it is described test tire and can with it is described test tire rotate synchronously wheel shaft, the wheel shaft selectively with the test Wheel mounting base is fixed.

Preferably, the bearing plate is slidingly disposed at the side stand vertical with the road surface template, and the bearing plate With for driving the bearing plate to be connected along the bearing plate driving device that the side stand slides.

Preferably, the side stand is equipped with crossed roller guide rail, the crossed roller guide rail and for the load-bearing to be arranged The support frame of plate is connected.

Preferably, the bearing plate driving device includes driving motor, and the bearing plate is by being set around the steel of fixed pulley Cord is connected with the driving motor.

Preferably, the side stand is equipped at least one for limiting the quantity for falling in the pouring weight on the bearing plate Limit hole, it further includes for selectively that each pouring weight, which is equipped with for the slot with limit hole cooperation limit, The limit pin shaft being arranged in the limit hole and the slot.

Preferably, the template driving device includes stepper motor, the lead screw being connected with the stepper motor, is sheathed on institute The ball nut of lead screw is stated, the ball nut is connected with one end of the pull pressure sensor, the pull pressure sensor The other end is connected with the workbench.

Preferably, the ball nut is connected with the pull pressure sensor by oscillating bearing.

It preferably, further include the both ends for being set to the stroke of the workbench, the fine motion for controlling the workbench commutation Switch.

Tire rolling resistance coefficient determination experimental rig provided by the utility model, in use, in tire loading mechanism to test Tire applies default normal pressure, makes after testing tire compression road surface template, measures template driving device by pull pressure sensor Drive the movement of road surface template and the second driving force with dynamic test tire uniform rotation；Before this, test tire be not installed When, similarly default normal pressure is applied by tire loading mechanism road pavement template, template is measured by pull pressure sensor and is driven Road surface template fortune is being operated alone with this to exclude template driving device in the First Driving Force of dynamic device driving road surface template movement The frictional force to be overcome when dynamic.Therefore, the second driving force and the difference of First Driving Force are to test the rolling resistance of tire, rolling The ratio of dynamic resistance and default normal pressure is the rolling resistance coefficient for testing tire.

Since the road surface template that the tire rolls resistance coefficient determination experimental rig is straight road surface template, existing skill is changed The technical thought that tire rolling resistance coefficient is measured in art, that is, the loopy moving of the circulating rolling of roller or ring steel belt is become The straight movement of road surface template.This avoids error, or the flexible deformation because of ring steel belt are corrected as brought by diameter of cylinder Introduced error, improves measurement accuracy.And the surface of road surface template is equipped with the adhesive layer being consistent with practical road surface material, because This, can measure practical rolling resistance coefficient of the tire on true road surface, and measurement result is truer, reliable.Further, pressure passes Sensor compared with the prior art in wheel shaft with sensor price inexpensively, and experimental rig structure it is simple, to working environment Relatively low with structure precision requirement, therefore, cost is relatively low.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 is the structural representation of tire provided by the utility model rolling resistance coefficient determination experimental rig specific embodiment Figure；

Fig. 2 is the main view of tire loading mechanism in Fig. 1；

Fig. 3 is the side view of tire loading mechanism in Fig. 1；

Fig. 4 is the structural schematic diagram of wheel shaft mounting base in Fig. 1；

Fig. 5 is the structural schematic diagram of template driving device in Fig. 1；

Fig. 6 is the top view of Fig. 5；

Fig. 7 is the side view of Fig. 5.

Appended drawing reference of the Fig. 1 into Fig. 7 is as follows:

1 it is tire loading mechanism, 2 be template driving device, 3 be test tire, 4 be road surface template, 11 is load-bearing Plate, 12 be pouring weight, 121 be slot, 13 be wheel shaft, 131 be wheel shaft mounting base, 132 be end cap, 133 be anti-rotating hole, 14 For side stand, 141 be crossed roller guide rail, 142 be limit hole, 15 be support frame, 16 be fixed pulley, 17 be gag lever post, 171 it is stop nut, 18 be hoisting wirerope interconnecting piece, 21 be pull pressure sensor, 22 be stepper motor, 23 is silk Thick stick, 231 be lead screw support base, 24 be ball nut, 25 be workbench, 26 be oscillating bearing, 27 be connector, 28 be Second sliding block, 29 are guide rail.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

The core of the utility model is to provide a kind of tire rolling resistance coefficient determination experimental rig, tire rolling resistance coefficient determination The measurement error of experimental rig is small, and at low cost.

Fig. 1-Fig. 7 is please referred to, Fig. 1 is tire provided by the utility model rolling resistance coefficient determination experimental rig specific implementation The structural schematic diagram of example；Fig. 2 is the main view of tire loading mechanism in Fig. 1；Fig. 3 is the side view of tire loading mechanism in Fig. 1； Fig. 4 is the structural schematic diagram of wheel shaft mounting base in Fig. 1；Fig. 5 is the structural schematic diagram of template driving device in Fig. 1；Fig. 6 is Fig. 5 Top view；Fig. 7 is the side view of Fig. 5.

The utility model provides a kind of tire rolling resistance coefficient determination experimental rig, including road surface template 4, tire loading mechanism 1 and template driving device 2.

It should be noted that the road surface template 4 in the utility model is the Surface of Trial Pavement on straight similar practical road surface, road Face template 4 and the surface that contact of test tire 3 are equipped with the adhesive layer being consistent with practical road surface material, for example, the adhesive layer can be with For cement adhesive layer or pitch adhesive layer, that is to say, that road surface template 4 is the cement pavement template 4 that surface is attached with cement, Or surface is attached with the bituminous pavement template 4 of pitch.Specifically, it can select that there is unlike material attachment according to actual tests demand The road surface template 4 of layer hinders coefficient namely tire on true road surface to measure tire in the rolling on different materials road surface with this Rolling resistance coefficient, measurement result are truer, reliable.

It is understood that road surface template 4 is straight road surface template 4, this changes measurement tire rolling in the prior art The technical thought for hindering coefficient, that is, the loopy moving of the circulating rolling of roller or ring steel belt is become the straight of road surface template 4 It is mobile.This avoids error, or the error introduced because of the flexible deformation of ring steel belt is corrected as brought by diameter of cylinder, mention High measurement accuracy.

It should be noted that tire rolling resistance coefficient determination experimental rig is particularly suitable for pu tire, polyurethane wheel Tire is usually used in industrial vehicle, and compared to rubber tyre, speed is usually lower, therefore, especially using this straight road surface template 4 It is suitble to, and there is no the experimental rigs of special measurement pu tire rolling resistance coefficient in the prior art, therefore, for polyurethane For tire, which is completely new design.

Tire loading mechanism 1 is used to apply default normal pressure to test tire 3, so that test tire 3 compresses road surface template 4, so that when road surface template 4 is moved frictional force can be applied to test tire 3.

It should be noted that the default normal pressure in the utility model can be multiple and different pressure value, so as to Multiple groups rolling resistance coefficient is obtained by the different multiple groups test of positive pressure value, it is to be understood that in different positive pressures Under, the deformation that test tire 3 generates is different, and rolling resistance coefficient can be varied, and therefore, carries out multiple groups using different pressure values Test can reflect the situation of change of rolling resistance coefficient of the test tire 3 under different load-carryings.

The present embodiment is to the loading structure and loading method of tire loading mechanism 1 and is not specifically limited, for example, tire adds Carry and set 1 and can be loaded by pouring weight 12 and lever collective effect, can also by the modes such as hydraulic loaded, pneumatically loading come Normal pressure is applied to tire.

Template driving device 2 is connected by pull pressure sensor 21 with workbench 25, and workbench 25 is for being arranged road surface sample Plate 4, template driving device 2 is used to drive road surface template 4 mobile by the movement of driving workbench 25, so that road surface template 4 is right The frictional force band dynamic test tire 3 for testing tire 3 rotates.Obviously, pull pressure sensor 21 can acquire 2 band of template driving device Dynamic road surface template 4 driving force required when moving.When the default positive pressure that test tire 3 applies in tire loading mechanism 1 Lower compression road surface template 4 and template driving device 2 drive road surface template 4 mobile and when with dynamic test 3 uniform rotation of tire, draw Pressure sensor 21 can measure the second driving force of template driving device 2, before this, when not installing test tire 3, lead to It crosses 1 road pavement template 4 of tire loading mechanism and applies similarly default normal pressure, template driving is measured by pull pressure sensor 21 The First Driving Force that device 2 drives road surface template 4 to move, is being operated alone road surface template 4 with this to exclude template driving device 2 The frictional force to be overcome when movement.Second driving force and the difference of First Driving Force are to test the rolling resistance of tire 3, are rolled Resistance and the ratio of default normal pressure are the rolling resistance coefficient for testing tire 3.

Without limitation to the specific structure and driving method of template driving device 2, template driving device 2 can be with for the present embodiment The movement of road surface template 4 is realized by cylinder, motor and V-belt, motor and gearbox and electric pushrod etc..

In conclusion tire rolling resistance coefficient determination experimental rig provided by the utility model, fills in use, loading in tire It sets 1 pair of test tire 3 to apply default normal pressure, make after testing the compression road surface template 4 of tire 3, be surveyed by pull pressure sensor 21 It obtains template driving device 2 and drives the movement of road surface template 4 and the second driving force with 3 uniform rotation of dynamic test tire, before this, When not installing test tire, similarly default normal pressure is applied by 1 road pavement template 4 of tire loading mechanism, passes through tension and compression Force snesor 21 measures the First Driving Force that template driving device 2 drives road surface template 4 to move, and is filled with this to exclude template driving Set 2 be operated alone road surface template 4 move when the frictional force to be overcome.Second driving force and the difference of First Driving Force are to try The rolling resistance of tire 3 is tested, rolling resistance and the rolling of the ratio as test tire 3 of default normal pressure hinder coefficient.

Since the road surface template 4 that the tire rolls resistance coefficient determination experimental rig is straight road surface template 4, change existing The technical thought that tire rolling resistance coefficient is measured in technology, that is, the loopy moving of the circulating rolling of roller or ring steel belt is become For the straight movement of road surface template 4.This avoids error, or the elasticity change because of ring steel belt are corrected as brought by diameter of cylinder The introduced error of shape, improves measurement accuracy.And the surface of road surface template 4 is equipped with the attachment being consistent with practical road surface material Therefore layer can measure practical rolling resistance coefficient of the tire on true road surface, measurement result is truer, reliable.Further, it draws Pressure sensor 21 compared with the prior art in wheel shaft with sensor price inexpensively, and experimental rig structure is simple, right Working environment and structure precision requirement are relatively low, and therefore, cost is relatively low.

In view of simple and the being easy to implement property of the specific structure of tire loading mechanism 1, on the basis of above-described embodiment On, tire loading mechanism 1 includes bearing plate 11 and several pouring weights 12 being stacked on bearing plate 11, and pouring weight 12 has default matter Therefore amount can get suffered by tire according to the quality of the quantity of the pouring weight 12 applied to test tire 3 and pouring weight 12 itself The occurrence of default normal pressure.That is, the present embodiment can be by adjusting the quantity for the pouring weight 12 for playing pressure to test tire 3 To adjust the size of default positive pressure value.

Preferably, bearing plate 11 includes the limit of the plate-like body for placing pouring weight 12 and the position for limiting pouring weight 12 One end of position bar 17, gag lever post 17 is equipped with threaded post；Pouring weight 12 is equipped with through the limit installation hole of its thickness, several pouring weights After 12 superpositions, the axis in the limit installation hole of each pouring weight 12 is overlapped, and the corresponding position that hole is mounted offers in plate-like body Relief hole, gag lever post 17 sequentially pass through each pouring weight 12 limit installation hole and corresponding relief hole after from the limit with threaded post Nut 171 is locked.The length of gag lever post 17 can be adaptively adjusted according to the thickness and quantity of required pouring weight 12.Preferably, it limits The quantity of position bar 17 is two, a center line symmetrical setting of two gag lever posts 17 relative to bearing plate 11.

Further, the opposite two sides of bearing plate 11 are equipped with column.

It should be noted that tire rolling resistance coefficient determination experimental rig in the prior art generally can not measure the attached of tire Coefficient, the definition of attachment coefficient be the ratio of normal pressure suffered by tire maximum static friction force and tire.That is, in the prior art It is usually necessary to use two different experimental rigs to measure respectively to rolling resistance coefficient and attachment coefficient.To solve to roll resistance coefficient With the versatility problem of attachment coefficient experimental rig, on the basis of above-described embodiment, the bottom of bearing plate 11 is installed with examination Wheel mounting base 131 is tested, test wheel mounting base 131 is equipped with for being arranged test tire 3 and can rotate synchronously with test tire 3 Wheel shaft 13, wheel shaft 13 is selectively fixed with test wheel mounting base 131.

That is, the bearing plate 11 in the present embodiment applies default normal pressure by 13 pairs of test tires 3 of wheel shaft.Wheel shaft 13 can the rotation of relative test wheel mounting base 131 and optionally fixed with test wheel mounting base 131.When the rolling of measuring wheel tire hinders system When number, on road surface under the action of the frictional resistance of template 4, test tire 3 is made to be able to drive the synchronous rotation of wheel shaft 13, that is, wheel Matching between axis 13 and test tire 3 is combined into tight fit.When needing the attachment coefficient of measuring wheel tire, by the way that wheel shaft and test are taken turns Mounting base 131 is relatively fixed to be rotated to avoid testing tire 3 with the effect of the frictional force of road surface template 4.

Specifically, in the bottom of bearing plate 11 setting test wheel mounting base 131, wheel shaft 13 is installed in rotation on test wheel In mounting base 131, test wheel mounting base 131 is fixedly provided with the end cap 132 for fixing wheel shaft 13, end cap 132 and wheel shaft 13 End face is correspondingly provided at least two anti-rotating holes 133, when the anti-rotating hole 133 of 13 end face of wheel shaft is aligned with the anti-rotating hole 133 of end cap 132 Afterwards, it is inserted into fixed pin, it can be fixed by wheel shaft 13 and end cap 132.When needing rotates synchronously wheel shaft 13 with test tire 3, Fixed pin is pulled out.

In order to realize the automatic pressure of 11 pairs of bearing plate test tires 3, on the basis of above-described embodiment, load-bearing Plate 11 is slidingly disposed at the side stand 14 vertical with road surface template 4, and bearing plate 11 with for driving bearing plate 11 along collateral The bearing plate driving device that frame 14 slides is connected.

Preferably, side stand 14 is vertically arranged, and accordingly, road surface template 4 is horizontally disposed.

Preferably, the quantity of side stand 14 is two, and two side stands 14 are oppositely arranged on the two sides of bearing plate 11.

The tool that is slidably connected mode and bearing plate driving device of the present embodiment to bearing plate 11 and side stand 14 Body structure is without limitation.

In view of the specific implementation of bearing plate 11 and 14 slidable connection mode of side stand, in the base of above-described embodiment On plinth, side stand 14 is equipped with crossed roller guide rail 141, crossed roller guide rail 141 and the support frame for bearing plate 11 to be arranged 15 are connected.

That is, the present embodiment, which passes through the crossed roller guide rail 141 being arranged on side stand 14, drives 11 edge of bearing plate Side stand 14 slides.

Preferably, the two sides of each side stand 14 are equipped with crossed roller guide rail 141, and support frame 15 is including respectively and individually The connected fixed block of two crossed roller guide rails 141 of side stand 14 and along the extending direction perpendicular to crossed roller guide rail 141 Protrude the supporting table of the fixed block, bearing plate 11 is arranged in the supporting table, and in the bottom surface of the supporting table and fixed block Reinforcing rib is equipped between side.

In view of simple and the being easy to implement property of the specific structure of bearing plate driving device, on the basis of above-described embodiment On, bearing plate driving device includes driving motor, and bearing plate 11 is by being set around the wirerope and driving motor phase of fixed pulley 16 Even.

That is, the present embodiment makes wirerope tighten or unclamp by the rotation of driving motor, to make rope belt Dynamic bearing plate 11 rises or falls, so that test tire 3 unclamps or compress road surface template 4.Fixed pulley 16 has convenient for wirerope Sequence tightening is unclamped.

Preferably, bearing plate 11 be equipped with hoisting wirerope interconnecting piece 18, after wirerope is set around fixed pulley 16, one end with rise It hangs wirerope interconnecting piece 18 to be connected, the other end is connected with driving motor.Preferably, the quantity of hoisting wirerope interconnecting piece 18 is two A and symmetrical, two hoisting wirerope interconnecting pieces 18 are correspondingly arranged with two fixed pulleys 16 along short transverse respectively.

Preferably, fixed pulley 16 is arranged on the connection top plate of two opposite temples 14 of connection.

Preferably, hoisting wirerope interconnecting piece 18 is arranged on the crossbeam of two gag lever posts 17 of connection.

In order to enable bearing plate 11 to apply different default normal pressures to test tire 3, to obtain multiple groups experimental data, On the basis of above-described embodiment, side stand 14 is equipped at least one number for being used to limit the pouring weight 12 fallen on bearing plate 11 The limit hole 142 of amount, each pouring weight 12 are equipped with for the slot 121 with the cooperation limit of limit hole 142, further include for optional The limit pin shaft being arranged in selecting in limit hole 142 and slot 121.

That is, the present embodiment passes through the cooperation of limit pin shaft and limit hole 142 and slot 121, held to control to fall in The quantity of pouring weight 12 on weight plate 11.For example, when the total quantity for the pouring weight 12 being arranged on gag lever post 17 is ten, and certain adds When carrying only seven pouring weights 12 of needs, so that it may so that seven pouring weights 12 of number are fallen on bearing plate 11 from the bottom up, and above three It is a, be limited pin shaft and be limited at the corresponding position of limit hole 142 of side stand 14, that is, make above three pouring weights 12 it is outstanding Sky, without falling on bearing plate 11.Specifically, nethermost one slot 121 and limit in three pouring weights 12 above can be made Position hole 142 is aligned, and then limit pin shaft is sequentially inserted into limit hole 142 and slot 121 pouring weight 12 is fixed.

It should be noted that the number of limit hole 142 can be one, or at least two, when limit hole 142 When quantity is several, the lower and to be positioned pouring weight 12 of the setting status requirement to limit hole 142 can be selected neatly With the limit hole 142 of its slot 121 matching limit, it is easy to use.

In view of the realization of the specific structure of template driving device 2, on the basis of above-described embodiment, template driving dress It sets 2 and includes stepper motor 22, the lead screw 23 being connected with stepper motor 22, the ball nut 24 being set on lead screw 23, ball spiral shell Mother 24 is connected with one end of pull pressure sensor 21, the other end of pull pressure sensor 21 and the work for road surface template 4 to be arranged Make platform 25 to be connected.

That is, the present embodiment passes through the rotation of stepper motor 22, lead screw 23 is driven to rotate, and then make to be set in lead screw Ball nut 24 on 23 is moved along lead screw 23, to be sensed under the pushing or pull on of ball nut 24 by pressure Device 21 drives workbench 25 mobile, and road surface template 4 is arranged on workbench 25, therefore, drives road surface template 4 in template It is moved under the action of device 2.

In view of the installation fixation problem of template driving device 2, it is preferable that template driving device 2 further includes for carrying Pedestal, in use, the position of pedestal is fixed.

Preferably, pedestal is equipped with linear guide 29, and workbench 25 is connected by the first sliding block and the linear guide 29 sliding It connects, to ensure the movably stability of workbench 25.The end of pedestal is arranged in stepper motor 22, and lead screw 23 preferably passes through lead screw branch Support seat 231 is fixed with pedestal.Ball nut 24 and the second sliding block 28 are affixed, and the second sliding block 28 can be slided along linear guide 29, from And ball nut 24 is avoided to rotate in the process of moving, guarantee the movably stationarity of ball nut 24.It is further preferred that rolling Pearl nut 24 realizes the connection with pull pressure sensor 21 by the connector 27 being connected with the second sliding block 28.

In order to exclude the installation error between ball nut 24, pull pressure sensor 21 and workbench 25, it is ensured that pressure passes The power that sensor 21 measures is parallel with 23 axis direction of lead screw, on the basis of above-described embodiment, ball nut 24 and pressure Sensor 21 is connected by oscillating bearing 26.

Specifically, oscillating bearing 26 is set between connector 27 and pull pressure sensor 21.

It is understood that under the action of the same normal pressure, so that road surface template more than 4 times reciprocating motions, by adopting The reading of pull pressure sensor 21, is averaged and can reduce error, therefore, in order to increase when collecting 4 uniform motion of road surface template The cycle-index that road surface template 4 moves when measurement further includes on the basis of above-described embodiment the stroke set on workbench 25 Both ends, for control workbench 25 commutation microswitch.

That is, the present embodiment controls the commutation of workbench 25 by microswitch, so that it is guaranteed that workbench 25 exists The effect of stepper motor 22 lower reciprocating motion, the cycle-index that road surface template 4 moves when being measured by increasing reduce error, Improve precision.

Preferably, the both ends of pedestal are arranged in microswitch.

It is understood that microswitch and controller communicate to connect, controller is connected with stepper motor 22, according to micro- The dynamic signal controling stepping motor 22 detected that switchs inverts, so that workbench 25 be made to commutate.

The course of work of tire rolling resistance coefficient determination experimental rig is introduced by taking a specific embodiment as an example below.

When the rolling for measuring tire hinders coefficient, the tire of a certain specification is chosen first as test tire 3, for example, it is preferable to The tire is mounted on the wheel shaft 13 of 11 bottom of bearing plate by the pu tire of a certain material specification as test tire 3.Again The road surface template 4 that surface is equipped with the adhesive layer of a certain material is chosen, such as chooses the road surface template 4 that surface is equipped with cement adhesive layer It is tested, which is mounted on workbench 25.

Then, when testing tire 3 and being not yet installed on wheel shaft 13, by the pouring weight 12 of specified quantity (with will be applied to The quantity of pouring weight 12 on test tire 3 is identical) it is placed on bearing plate 11, remaining pouring weight 12 passes through limit pin shaft and limit hole 142 and the mating reaction of slot 121 be fixed on side stand 14.Start stepper motor 22, so that stepper motor 22 is powered and drive silk Thick stick 23 rotates, and then is axially moved the ball nut 24 being set on lead screw 23 along lead screw 23, so that ball nut 24 be made to push away The workbench 25 that dynamic or pulling is indirectly connected with it moves, when workbench 25 moves to an end margin of pedestal, workbench 25 The microswitch of touching installation on the base, is rotated backward by the signal controling stepping motor 22 of jogging switches measurement, thus Make ball nut 24 that workbench 25 be driven to run back, when workbench 25 moves to another end margin of pedestal, workbench 25 touch another microswitch again, are rotated backward again by the signal controling stepping motor 22 of jogging switches measurement, such as This circulation, moves back and forth workbench 25.

During workbench 25 moves back and forth, pull pressure sensor 21 acquires ball nut 24 and workbench 25 in real time Between pressure or pulling force, therefore, can to calculate road surface template 4 even for the pressure value and value of thrust acquired according to pull pressure sensor 21 The average value of pressure or pulling force when speed movement, when this value is the driving road surface template 4 under the effect of pouring weight 12 of specified quantity, First Driving Force required for the pulling of ball nut 24 or the components such as platform 25 and road surface template 4 that push the work forward move.

Then, the pouring weight of specified quantity 12 is placed on bearing plate 11, remaining pouring weight 12 passes through limit pin shaft and limit The mating reaction of hole 142 and slot 121 is fixed on side stand 14.Start driving motor, keeps driving motor fixed by being set around The wirerope of pulley 16 plays bearing plate 11 and slides along the crossed roller guide rail 141 on side stand 14, until bearing plate 11 is logical It crosses wheel shaft 13 and is pressed on tire is tested on road surface template 4, according to the quality of single pouring weight 12 and fall in the weight on bearing plate 11 12 quantity of block can must test the normal pressure that tire 3 is subject to.

Finally, being again started up stepper motor 22 in the case where testing the compression road surface template 4 of tire 3, making 25 band of workbench Dynamic road surface template 4 moves reciprocatingly, and tire 3 is tested in the pressure value acquired by pull pressure sensor 21 and value of thrust, calculating The average value of 21 registration of pull pressure sensor when uniform rotation, this value are to compress the feelings of road surface template 4 in test tire 3 Ball nut 24 pulls under condition or the platform 25 that pushes the work forward moves required second driving force, and the second driving force and above-mentioned first drive The difference of power as tests the rolling resistance of tire 3, and the ratio of normal pressure suffered by rolling resistance and test tire 3 is to roll Hinder coefficient.

By changing the changeable positive pressure value applied to test tire 3 of 12 quantity of pouring weight fallen on bearing plate 11, because This, can measure multiple groups normal pressure and rolling resistance as procedure described above, and then obtain multiple groups rolling resistance coefficient, be determined with this not The variation of the rolling resistance coefficient of lower test tire 3 is acted on load.

It is by fixed pin that end cap 132 and wheel shaft 13 is fixed first when measuring the attachment coefficient of tire, restart stepping Motor 22, so that ball nut 24 is pushed or pull on road surface template 4 and is tested tire 3 to movement, during this by static can not rotate, Acquire the registration of pull pressure sensor 21 during this, the maximum value of 21 registration of pull pressure sensor and above-mentioned First Driving Force Difference, as test the maximum static friction force of tire 3, the ratio of normal pressure suffered by maximum static friction force and tire is to adhere to Coefficient.

Equally, by changing the changeable normal pressure applied to test tire 3 of 12 quantity of pouring weight fallen on bearing plate 11 Therefore value can measure multiple groups normal pressure as procedure described above and test the maximum static friction force of tire 3, and then it is attached to obtain multiple groups Coefficient, the average value for calculating all attachment coefficients is the attachment coefficient of selected pu tire and cement pavement template 4.

It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.

Resistance coefficient determination experimental rig is rolled to tire provided by the utility model above to be described in detail.Herein Specific case is applied to be expounded the principles of the present invention and embodiment, the explanation of above example is only intended to Help understands the method and its core concept of the utility model.It should be pointed out that coming for those skilled in the art It says, without departing from the principle of this utility model, several improvements and modifications can be made to this utility model, these change Into in the protection scope for also falling into the utility model claims with modification.

Claims (10)

1. a kind of tire rolling resistance coefficient determination experimental rig characterized by comprising

The surface of straight road surface template (4) for contacting with test tire (3), the road surface template (4) is equipped with and reality The adhesive layer that road surface material is consistent；

For being arranged the workbench (25) of the road surface template (4), the workbench (25) by pull pressure sensor (21) with For driving the template driving device (2) of the movable workbench to be connected；

For the test tire (3) to be arranged and applies default normal pressure to it, so that the test tire (3) compresses the road The tire loading mechanism (1) of face template (4).

2. tire rolling resistance coefficient determination experimental rig according to claim 1, which is characterized in that the tire loading mechanism (1) include:

For compressing the bearing plate (11) of test tire (3)；

Folded several pouring weights (12) with preset quality being located on the bearing plate (11).

3. tire rolling resistance coefficient determination experimental rig according to claim 2, which is characterized in that the bearing plate (11) Bottom is installed with test wheel mounting base (131), and test wheel mounting base (131) is equipped with for being arranged the test tire (3) it and can selectively be taken turns with the test with the wheel shaft (13) of test tire (3) synchronous rotation, the wheel shaft (13) Mounting base (131) is fixed.

4. tire rolling resistance coefficient determination experimental rig according to claim 2, which is characterized in that the bearing plate (11) can Slidably be set to the side stand (14) vertical with road surface template (4), and the bearing plate (11) with for holding described in driving Weight plate (11) is connected along the bearing plate driving device that the side stand (14) slides.

5. tire rolling resistance coefficient determination experimental rig according to claim 4, which is characterized in that the side stand (14) sets Have crossed roller guide rail (141), the crossed roller guide rail (141) and the support frame (15) for the bearing plate (11) to be arranged It is connected.

6. tire rolling resistance coefficient determination experimental rig according to claim 4, which is characterized in that the bearing plate driving dress It sets including driving motor, the bearing plate (11) is connected by being set around the wirerope of fixed pulley (16) with the driving motor.

7. tire rolling resistance coefficient determination experimental rig according to claim 4, which is characterized in that the side stand (14) sets There is at least one to be used to limit the limit hole (142) of the quantity of the pouring weight (12) fallen on the bearing plate (11), each The pouring weight (12) is equipped with for the slot (121) with the limit hole (142) cooperation limit, further includes for selectively The limit pin shaft being arranged in the limit hole (142) and the slot (121).

8. tire rolling resistance coefficient determination experimental rig according to claim 1-7, which is characterized in that the template Driving device (2) includes stepper motor (22), is connected with the stepper motor (22) lead screw (23) is sheathed on the lead screw (23) ball nut (24), the ball nut (24) are connected with one end of the pull pressure sensor (21), the tension and compression The other end of force snesor (21) is connected with the workbench (25).

9. tire rolling resistance coefficient determination experimental rig according to claim 8, which is characterized in that the ball nut (24) It is connected with the pull pressure sensor (21) by oscillating bearing (26).

10. tire rolling resistance coefficient determination experimental rig according to claim 8, which is characterized in that further include set on described The both ends of the stroke of workbench (25), the microswitch for controlling the workbench (25) commutation.