CN2357036Y

CN2357036Y - Tracing rut tester

Info

Publication number: CN2357036Y
Application number: CN 98252179
Authority: CN
Inventors: 刘子荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-28
Filing date: 1998-12-28
Publication date: 2000-01-05
Anticipated expiration: 2008-12-28

Abstract

The utility model relates to a tracing rut tester which comprises a machine frame, a worktable, a grinding roller, a counterweight, a travelling device, etc. The utility model is characterized in that a sliding frame board is connected to screw rods of the transverse travelling part of the travelling device by screws; a lifting platform is connected with a connecting rod of the longitudinal travelling part of the travelling device, a guide pillar sleeve is fixed to the lifting platform, and a guide pillar is arranged in the guide pillar sleeve; a motor is fixed to the lifting platform and drives an endless screw and a worm wheel through a sprocket wheel; a screw nut is fixed to the worm wheel, and a screw rod is screwed in the screw nut; the screw rod butts the bottom of the counterweight. The utility model has the advantage of accurate and reliable results, and can be widely used in rut experiments of various asphalt roadways.

Description

Wheel rutting test machine

The utility model relates to a kind of experimental rig of highway pavement dynamic stability.

Wheel rutting test machine is the experimental rig that is used to examine highway asphalt mixture road surface dynamic stability situation under 60 ℃ of left and right sides temperature, during test, generally be on the road surface, to downcut one, or make a bitumen mixture specimen with forming machine, after adding 70 kilograms of counterweights, simulation rolls wheel, carries out detecting when horizontal and vertical stone roller is rubbed with the hands the distortion situation of test specimen on test specimen.Existing wheel rutting test machine (as Fig. 8, shown in Figure 9), comprise a frame 40, fix two

motors

41,42 on frame 40, wherein a motor 41 drives a

crank connecting link

43,44 by reducing gear, drives test dolly 46 lengthwise movements that are loaded with workbench 45 by connecting rod 44.Another motor 42 drives a leading screw 47 by reducing gear, drives the load maintainer transverse movement that rolling wheel 48 is housed by leading screw 47.Load maintainer is a lever 49, and one end and leading screw 47 are spirally connected, and the centre is a rolling wheel 48, in the other end suspension counterweight of lever 49.Displacement transducer is installed in rolling wheel 48 tops.The shortcoming that above-mentioned rut is tested machine is: 1, because rolling wheel only carries out transverse movement, and vertically moved by the workbench that is loaded with test specimen, the actual motion state of this and automotive wheel is variant.2, because the end that lever adds counterweight is that unsettled setting is not (when using, hang in the hook 52 on gantry 51), in the field compaction test process, counterweight can all around be rocked with vertical or horizontal displacement, the data that sensor transmitted are extremely unstable, therefore cause experimental data inaccurate, often to carry out test of many times for this reason after, average.

At the problems referred to above, the purpose of this utility model provides and a kind ofly very truly rolls state near doughnut, and counterweight is provided with stable wheel rutting test machine.

For achieving the above object, the utility model is taked following design: a kind of wheel rutting test machine, it comprises frame, workbench, rolling wheel, counterweight, running gear, displacement transducer and control device, described rolling wheel are installed on the rolling wheel support, described running gear comprises vertical running gear of being made up of motor, crank connecting link, and the horizontal running gear of being made up of motor, sprocket transmission device, leading screw; It is characterized in that: described upper rack has two cross slide waies, and described stationary table is in described frame lower; One balladeur train plate, it is screwed onto on the described leading screw of described horizontal running gear, and seat is on described two cross slide waies; Have two longitudinal rails on the described balladeur train plate; One elevating stage, it is connected with the connecting rod of described vertical running gear, and seat is on described two longitudinal rails; Be fixed with two guide column sleeves on the described elevating stage, be provided with a guide pillar in each described guide column sleeve, described two guide pillars bottom connects a bottom plate, and described rolling wheel support is fixed on the described bottom plate, described two guide pillar tops are connected with a upper mounted plate, and it is provided with described counterweight; Also be fixed with a motor on the described elevating stage, it connects a worm screw by sprocket transmission device, a worm gear and described worm engaging, and be fixed with a screw on it, a leading screw is screwed onto in the described screw, and its top withstands on described upper mounted plate center.

For making smooth running, described horizontal and vertical guide rail can adopt rolling linear guide.

Be the power of reducing friction, can between described each guide column sleeve and described guide pillar, ball bushing be set.

For easy for installation, can between the described motor of described vertical running gear and described crank connecting link, sprocket transmission device be set.

The utility model is owing to take above design, it has the following advantages: 1, the utility model is owing to be provided with an elevating stage, and on elevating stage, be provided with by motor and drive the lifting gear that leading screw is formed by sprocket wheel, worm screw, worm gear, screw, simultaneously, owing on elevating stage, be provided with guide pillar, on the upper mounted plate of guide pillar, add counterweight, on the guide pillar bottom plate, connect rolling wheel, make the utility model at the trial, counterweight directly stably can be added on the rolling wheel, make experimental data very accurately and reliably.2, the utility model is owing to vertically walk with the direct traction rolling wheel of vertical running gear, rather than as dragging the test specimen lengthwise movement in the prior art, therefore in the field compaction test process, rolling wheel vertically moves the walking states of more approaching actual doughnut when laterally moving.3, the utility model makes the walking operation quite steady owing to adopt rolling linear guide as guide rail, friction, and the computer graphical that draws is very good.4, the utility model makes guide pillar not have friction substantially in movement in vertical direction owing to be provided with ball bushing in guide column sleeve, and therefore the counterweight that is added on the rolling wheel is very accurate, makes result of the test very reliable.The utility model operates steadily, and noise is little, the very approaching actual state that rolls of test method, result of the test accurately and reliably, it can be widely used in the wheel tracking test process of various asphaltic road-mix surface courses.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the utility model structural representation

Fig. 2 is the schematic top plan view of Fig. 1

Fig. 3 is that schematic diagram is looked on the left side of Fig. 1

Fig. 4 is the utility model elevating stage structural representation

Fig. 5 is that schematic diagram is looked on the left side of Fig. 4

Fig. 6 is the utility model elevating stage lifting drive mechanism schematic diagram

Fig. 7 is the schematic top plan view of Fig. 6

Fig. 8 is the prior art structural representation

Fig. 9 is that schematic diagram is looked on the left side of Fig. 8

As Fig. 1, Fig. 2, shown in Figure 3, the utility model comprises a frame 1, and frame 1 top is provided with two cross slide waies 2.One workbench 3 is fixedly connected on frame 1 bottom, can place bitumen mixture specimen on it.One balladeur train plate 4 by section steel manufacture, its top has two longitudinal rails 5, and its bottom has cross slide way seat 6.Balladeur train plate 4 is sitting on two cross slide waies 2 of frame 1 by cross slide way seat 6.One is fixed on the reducing motor 7 of frame 1 bottom, drives a leading screw 9 that is supported on frame 1 top by sprocket transmission device 8, and leading screw 9 is spirally connected with the screw 10 that is arranged on balladeur train plate 4 bottoms.The bottom of one elevating stage 11 has longitudinal rail seat 12, and elevating stage 11 is sitting on two longitudinal rails 5 of balladeur train plate 4 by longitudinal rail seat 12.One reducing motor 13 is fixed on the electric machine support on balladeur train plate 4 tops, and it is by the big disk 15 of sprocket transmission device 14 drive crank-link mechanisms, and off-centre is fixed a connecting rod 16 on the big disk 15, and the other end of connecting rod 16 is connected with elevating stage 11.

As Fig. 1, Fig. 4, shown in Figure 5, on elevating stage 11, be fixed with two guide column sleeves 17, a guide pillar 18 is set respectively in two guide column sleeves 17, connect a upper mounted plate 19 at the top of two guide pillars 18.Upper mounted plate 19 is provided with locating hole, plugs pin 20 and just can place the needed counterweight 21 of test in locating hole.Connect a bottom plate 22 in the bottom of two guide pillars 18, a rolling wheel support 23 is linked together with bottom plate 22, on rolling wheel support 23, be connected with test rolling wheel 24.Elevating stage 11 is provided with lifting gear, and lifting gear comprises that one is fixed on the motor 25 on the elevating stage 11, and it drives a worm screw 27 (as Fig. 6, shown in Figure 7) by sprocket transmission device 26.One worm gear 28 and worm screw 27 engagements are fixed with a screw 29 on the worm gear 28, the leading screw 30 that is spirally connected in the screw 29, and leading screw 30 tops of stretching out withstand on upper mounted plate 19 centers of two guide pillars 18.Displacement transducer 31 is connected (as shown in Figure 5) on the guide pillar upper mounted plate 19 by fastening devices 32, and the travel switch equal controller in the utility model needs to install routinely.

In the foregoing description, vertically the transmission device of running gear passes through deceleration device with motor also can be in prior art, directly drive big disk, perhaps take other kind of drive, and the utility model has increased sprocket transmission device 14 and makes installation very flexible as bent tenon connecting rod.

In the various embodiments described above, the

guide rail

2,5 of horizontal and vertical running gear can adopt rolling linear guide, and this guide rail is on sale on market, its guiding accurately, coefficient of friction is minimum, makes that operation is very steady, noise is little.

In the various embodiments described above,, counterweight more accurately is added on the rolling wheel, one or two ball bushing 33 can be set between each guide column sleeve 17 and guide pillar 18 for the power of reducing friction.

When the utility model was done experiment, at first one of cutting or be placed on the table surface at test specimen of making on the forming machine with same composition to the on-the-spot road surface was placed on 70 kilograms counterweights at the upper mounted plate top of guide pillar.Then with the electric motor starting on the elevating stage, sprocket transmission device drives leading screw and moves vertically downward by worm screw, worm gear, nut, the guide pillar upper mounted plate that is loaded with counterweight then slowly moves down with leading screw by the effect of guide pillar and guide column sleeve, after being installed in rolling wheel on the guide pillar bottom plate by the rolling wheel support and dropping on the test specimen on the workbench, leading screw still moves down a segment distance again, leave upper mounted plate fully until its top, all drop on the rolling wheel to guarantee 70 kilograms of counterweights.At this moment open the motor of vertical and horizontal running gear, one motor drags the elevating stage that rolling wheel is housed by sprocket transmission device drive leading screw and laterally walks, another motor drags the elevating stage that rolling wheel is housed by sprocket transmission device drive crank connecting link and vertically walks, field compaction test begins, and displacement transducer is by computer opening entry experimental data.

When off-test, the motor on the elevating stage restarts and reverse rotation, and leading screw upwards rises, and upper mounted plate is upwards pushed up, and returns back to original position.

Claims

1, a kind of wheel rutting test machine, it comprises frame, workbench, rolling wheel, counterweight, running gear, displacement transducer and control device, described rolling wheel is installed on the rolling wheel support, and described running gear comprises vertical running gear of being made up of motor, crank connecting link, and the horizontal running gear of being made up of motor, sprocket transmission device, leading screw; It is characterized in that: described upper rack has two cross slide waies, and described stationary table is in described frame lower; One balladeur train plate, it is screwed onto on the described leading screw of described horizontal running gear, and seat is on described two cross slide waies; Have two longitudinal rails on the described balladeur train plate; One elevating stage, it is connected with the connecting rod of described vertical running gear, and seat is on described two longitudinal rails; Be fixed with two guide column sleeves on the described elevating stage, be provided with a guide pillar in each described guide column sleeve, described two guide pillars bottom connects a bottom plate, and described rolling wheel support is fixed on the described bottom plate, described two guide pillar tops are connected with a upper mounted plate, and it is provided with described counterweight; Also be fixed with a motor on the described elevating stage, it connects a worm screw by sprocket transmission device, a worm gear and described worm engaging, and be fixed with a screw on it, a leading screw is screwed onto in the described screw, and its top withstands on described upper mounted plate center.

2, wheel rutting test machine as claimed in claim 1 is characterized in that: described horizontal and vertical guide rail is a rolling linear guide.

3, wheel rutting test machine as claimed in claim 1 or 2 is characterized in that: be provided with ball bushing between described each guide column sleeve and the described guide pillar.

4, wheel rutting test machine as claimed in claim 1 or 2 is characterized in that: be provided with sprocket transmission device between the described motor of described vertical running gear and described crank connecting link.

5, wheel rutting test machine as claimed in claim 3 is characterized in that: be provided with sprocket transmission device between the described motor of described vertical running gear and described crank connecting link.