CN214084266U

CN214084266U - Contact method wheel diameter jump detecting system

Info

Publication number: CN214084266U
Application number: CN201822051177.0U
Authority: CN
Inventors: 贺子铭; 马开富; 徐见; 芮军
Original assignee: Maanshan City Leishi Track Traffic Equipment Co ltd
Current assignee: Maanshan City Leishi Track Traffic Equipment Co ltd
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2021-08-31
Anticipated expiration: 2028-12-07

Abstract

The utility model discloses a contact method wheel footpath jump detecting system belongs to track traffic technical field. The utility model discloses an online dynamic detection system, include and install in proper order in inboard leading-end mechanism of track and detection mechanism along train warehouse entry direction, detection mechanism still includes guide pillar guide pin bushing mechanism including installing in inboard footboard assembly, first sliding plate and the fixed plate assembly that just is parallel to each other of track, and wherein first sliding plate passes guide pillar guide pin bushing mechanism and all slides through slide rail mechanism between footboard assembly and the fixed plate assembly and link to each other, this first sliding plate with lift actuating mechanism link to each other and with be equipped with elastic element between the footboard assembly. Adopt the technical scheme of the utility model can carry out real-time dynamic detection to the train radial runout under the high-speed running state of train, and its detection precision obtains effectively improving for current detection mechanism, and this detection device's structural stability is better.

Description

Contact method wheel diameter jump detecting system

Technical Field

The utility model belongs to the technical field of the track traffic, more specifically say, relate to a contact method wheel footpath detection system that jumps.

Background

In railway applications, the running part, especially the running state of wheel sets, plays an important role in train safety. Wheel set parameters that play an important role in safety include: rim wear, circumferential wear, tread scuffing, and the like. When the tread of the wheel has faults of scratch, peeling, radial run-out, rolling, and the like, extra impact force can be generated on the steel rail in the running process of the train, so that the service life of the steel rail is reduced, and cracks and fractures can be caused in severe cases. When the steel rail is hit, the scratch fault also brings impact to the vehicle, generates vibration and has a destructive effect on the vehicle bearing.

Therefore, the detection of the defects such as radial runout of the wheel tread and the like has important significance for ensuring the driving safety of the train. In the prior art, the monitoring method of the wheel tread fault mainly comprises static monitoring and dynamic monitoring, wherein the static monitoring method can be carried out only under the condition that a locomotive is stopped or a wheel is disassembled, the efficiency is low, and the labor intensity is high. The on-line dynamic monitoring refers to real-time on-line measurement performed when a train normally runs on a steel rail, and the on-line detection is increasingly paid attention at home and abroad due to the characteristics of high measurement automation degree, no occupation of the turnover time of rolling stock, convenience in storing wheel information data and the like. The existing dynamic monitoring method mainly comprises the following steps: (1) a vibration acceleration monitoring method; (2) an image monitoring method; (3) displacement monitoring method; (4) a contact monitoring method.

Among them, the existing contact measurement method generally adopts a parallelogram structure. For example, chinese patent 201620323667.X discloses a dynamic detection device for wheel tread scratches and out-of-roundness, which comprises a base plate disposed on the inner side of a steel rail, at least two sets of parallelogram mechanisms disposed on the base plate, a scratch rod contacting with the wheel tread hinged to the top of each parallelogram mechanism, a first damping mechanism disposed between the scratch rod and the base plate, a second damping mechanism disposed between each parallelogram mechanism and the base plate, an induction plate disposed at the bottom of the scratch rod, and a displacement sensor disposed on the base plate for inducing displacement of the induction plate. The application can improve the impact resistance of the detection mechanism to a certain extent through the installation of the damping mechanism, but the detection precision and the structural stability of the detection mechanism are still to be further improved. Meanwhile, the device cannot control the height of the scratching rod of the parallelogram mechanism, and when the height of the wheel rim is different due to abrasion, the wheel rim is not in contact with the scratching rod or is in excessive contact with the scratching rod, so that the problem that the mechanism is not impacted and damaged due to the influence of no measurement result or large impact on the mechanism is caused.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

An object of the utility model is to overcome the above problem that current train wheel tread defect detection exists, provide a contact method wheel footpath jump detecting system. Adopt the technical scheme of the utility model can carry out real-time dynamic detection to the train radial runout under the high-speed running state of train, and its detection precision obtains effectively improving for current detection mechanism, and this detection device's structural stability is better.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a contact method wheel diameter runout detecting system, include leading mechanism and detection mechanism that installs in the inboard track in proper order along train warehouse entry direction, wherein leading mechanism is used for detecting the rim height of waiting to detect the wheel, detection mechanism is used for detecting the wheel diameter runout, this detection mechanism includes the footboard assembly that installs in the inboard track and be parallel to each other, first sliding plate and fixed plate assembly, still include guide pillar and guide bushing mechanism, wherein first sliding plate passes guide pillar and guide bushing mechanism and all slides through slide rail mechanism between footboard assembly and the fixed plate assembly and link to each other, this first sliding plate links to each other with lift actuating mechanism and is equipped with elastic element between the footboard assembly; the pedal assembly is provided with a displacement sensing plate, and the first sliding plate is correspondingly provided with a displacement sensor.

Furthermore, the detection mechanisms are symmetrically arranged on the inner sides of the tracks at the two sides, and the number of the detection mechanisms at the same side is more than or equal to 2; the front of the front-end mechanism is also provided with a trigger mechanism, and the trigger mechanism comprises a first magnetic steel and a second magnetic steel which are arranged at intervals along the inner side of the unilateral track.

Furthermore, the lifting device further comprises a bottom plate assembly, wherein the bottom plate assembly is fixedly arranged below the track, and the fixing plate assembly, the lifting driving mechanism and the guide pillar and guide sleeve mechanism are fixedly arranged on the bottom plate assembly.

Furthermore, a guide sleeve of the guide post and guide sleeve mechanism is fixedly arranged on the upper part of the first sliding plate, the guide post penetrates through the guide sleeve, a lining is arranged between the guide post and the guide sleeve, and balls are arranged on the lining; the bottom end of the guide pillar is fixedly arranged on the bottom plate assembly, and the bottom plate assembly is fixedly arranged below the track.

Furthermore, a second sliding plate is arranged between the first sliding plate and the fixed plate assembly, the second sliding plate is connected with the first sliding plate through a bearing and is connected with the fixed plate assembly through a sliding rail mechanism, and the displacement sensor is correspondingly arranged on the second sliding plate.

Furthermore, the lifting driving mechanism comprises a servo electric cylinder, the free end of a piston rod of the servo electric cylinder is fixedly connected with the connecting block, and the connecting block is fixedly connected with the first sliding plate.

Furthermore, a bearing is installed in the connecting block, a bearing pin is arranged in the second sliding plate, and the bearing pin is inserted into the bearing and hinged with the connecting block.

Furthermore, the slide rail mechanism between the first sliding plate and the pedal assembly is obliquely installed relative to the first sliding plate, and the slide rail mechanism between the first sliding plate and the fixed plate assembly is vertically installed relative to the first sliding plate.

Furthermore, the fixing plate assembly comprises a main fixing plate, end fixing plates positioned at two ends of the main fixing plate and an upper sealing plate positioned at the top of the main fixing plate, wherein the main fixing plate, the end fixing plates and the upper sealing plate surround together to form a box-type structure; the first sliding plate is connected with the pedal assembly in a sliding mode through a first sliding rail, connected with the main fixing plate in a sliding mode through a second sliding rail and connected with the end fixing plate in a sliding mode through a third sliding rail; and an intermediate fixed plate is arranged between the first sliding plate and the pedal assembly, and the first sliding plate is connected with the intermediate fixed plate in a sliding manner through a fourth sliding rail.

Furthermore, the installation direction of the elastic element is parallel to the installation direction of a sliding rail mechanism between the first sliding plate and the pedal assembly, and a tension spring or a pressure spring structure is adopted; the pedal assembly comprises a pedal and a pedal supporting plate, and the pedal is arranged on the pedal supporting plate; the displacement induction plate and the first sliding rail are both arranged on the pedal supporting plate.

Furthermore, the structure of the front-end mechanism is the same as that of the detection mechanism, and the upper surface of the pedal assembly sequentially comprises an ascending section, a horizontal section and a descending section along the warehousing direction of the train.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following effect of showing:

(1) the utility model discloses a contact method wheel diameter jump detecting system, include and install in the inboard leading-end mechanism of track and detection mechanism in proper order along train warehouse entry direction, treat the rim height that detects train wheel through leading-end mechanism and detect and feed back to control system, adjust the initial height of detection mechanism through control system control, thereby can satisfy the detection requirement of the high wheel of different rims, cause great impact to detection mechanism when preventing that the wheel from strikeing detection mechanism fast, the life of mechanism has been prolonged, and reduced the impact vibration to the influence that detects the precision, be favorable to guaranteeing measurement accuracy.

(2) The utility model relates to a contact method wheel diameter jump detection system, the detection mechanism of which comprises a pedal assembly, a first sliding plate and a fixed plate assembly which are arranged at the inner side of a track and are parallel to each other, when the train wheel presses the pedal assembly, the pedal assembly can generate pressing movement relative to the first sliding plate along the sliding rail mechanism, and when the train wheel leaves the pedal assembly, the pedal assembly carries out upward return motion along the slide rail mechanism under the action of the elastic element, thereby driving the displacement sensing plate to move relative to the displacement sensor, through the distance change between the displacement sensor and the displacement sensing plate in the perimeter of the whole wheel tread, can carry out on-line dynamic measurement on the radial run-out of the tread of the train wheel, greatly improves the measurement efficiency, and the measurement precision and the structural stability of the whole measuring device are obviously improved compared with the existing parallelogram measuring mechanism. Meanwhile, the first sliding plate is connected with the lifting driving mechanism, and the lifting driving mechanism is controlled to operate according to the detection result of the front-end mechanism, so that the first sliding plate is driven to perform lifting motion, and the pedal assembly and the first sliding plate can perform synchronous lifting motion relative to the fixed plate assembly under the action of the elastic element, so that the height adjustment of the pedal assembly is realized, the detection of wheels of trains with different wheel rim heights can be met, and the impact effect of the wheels on the pedal assembly is favorably reduced.

(3) The utility model discloses a contact method wheel diameter is jumped detecting system, detecting mechanism still includes guide pillar and guide pin bushing mechanism, and first sliding plate passes guide pillar and guide pin bushing mechanism, can lead to the motion of first sliding plate through guide pillar and guide pin bushing mechanism's setting to can guarantee that first sliding plate can only produce the displacement along guide pillar and guide pin bushing mechanism direction, and prevent that the wheel from pressing first sliding plate emergence slope when the footboard assembly, and then be favorable to improving the accuracy of testing result. Still be equipped with the inside lining between guide pillar and the guide pillar of guide pillar and guide pin bushing mechanism, and be equipped with the ball on the inside lining to be favorable to further guaranteeing the full play of guide pillar and guide pin bushing mechanism effect, prevent that first sliding plate from following the downward motion of footboard assembly in the testing process.

(4) The utility model discloses a contact method wheel diameter jump detecting system, the track inboard is located leading mechanism front end and still is equipped with trigger mechanism, and this trigger mechanism includes first magnet steel and the second magnet steel that sets up along the inboard interval of track, can judge the warehouse entry and the warehouse-out of train according to the order of triggering of first magnet steel and second magnet steel to be convenient for decide leading mechanism and detection mechanism start whether or not. In addition, the running speed of the train can be measured through the arrangement of the first magnetic steel and the second magnetic steel.

(5) The utility model discloses a contact method wheel diameter jump detecting system, detection mechanism symmetry install in two side track inboards, and be greater than or equal to 2 with the quantity of detection mechanism, specifically aim at satisfying the detection of the whole tread girth of wheel, adopt this kind of design can satisfy the demand that detects to different wheels around, prevent that preceding wheel from not leaving detection mechanism and then a wheel has got into the influence of detection mechanism to the testing result.

(6) The utility model discloses a contact method wheel diameter jumps detecting system, though can prevent to a certain extent through setting up of guide pin bushing guide pillar mechanism that first sliding plate from downstream under the wheel roll extrusion, but first sliding plate still can not avoid producing little slope, the utility model discloses a set up the second sliding plate between first sliding plate and fixed plate assembly, the second sliding plate passes through the bearing with first sliding plate and links to each other, and displacement sensor corresponds installs on the second sliding plate, consequently presses the footboard assembly when leading to the slope of first sliding plate when the wheel, and the second sliding plate does not produce the slope to do not influence data measurement's accuracy.

(7) The utility model discloses a contact method wheel diameter jumps detecting system, slide rail mechanism between first sliding plate and the fixed plate assembly is installed for first sliding plate is perpendicular, and slide rail mechanism between first sliding plate and the footboard assembly is for first sliding plate slope installation to be favorable to further improving the stability of whole measuring device structure and operation, and effectively reduce the impact of wheel to detection device, guaranteed measuring result's accuracy.

(8) The utility model discloses a contact method wheel diameter is jumped detecting system, the fixed plate assembly include main fixed plate, the end fixing plate that is located main fixed plate both ends and be located the upper seal plate at main fixed plate top, main fixed plate, end fixing plate and upper seal plate surround jointly and form box structure, and first sliding plate slides through second slide rail and main fixed plate and links to each other, slides through third slide rail and end fixing plate and links to each other; meanwhile, an intermediate fixing plate is arranged between the first sliding plate and the pedal assembly, and the first sliding plate is connected with the intermediate fixing plate in a sliding mode through a fourth sliding rail, namely the first sliding plate and the second sliding plate are both installed inside the box-type fixing plate assembly, so that the stability of movement between the first sliding plate and the fixing plate and the stability of the whole detection device structure are further improved.

Drawings

Fig. 1 is a schematic plan view of the inspection system of the present invention;

FIG. 2 is a control schematic diagram of the detection system of the present invention;

FIG. 3 is a schematic structural view of a front-end mechanism pedal of the present invention;

fig. 4 is a schematic view of the overall structure of the detecting mechanism of the present invention;

fig. 5 is a schematic structural view of a fixing plate assembly of the detection mechanism of the present invention;

fig. 6 is a schematic diagram (one) of the disassembly structure of the detection mechanism of the present invention;

fig. 7 is a schematic diagram (ii) of the detaching structure of the detecting mechanism of the present invention;

fig. 8 is a schematic diagram (iii) of the detachment structure of the detection mechanism of the present invention;

fig. 9 is a schematic diagram (four) of the detachment structure of the detection mechanism of the present invention;

fig. 10 is a schematic diagram (five) of the detachment structure of the detection mechanism of the present invention;

fig. 11 is a schematic view of the mounting structure of the first sliding plate according to the present invention;

fig. 12 is a schematic structural diagram of the bottom plate assembly of the present invention;

fig. 13 is a schematic structural view of the lifting driving mechanism of the present invention;

fig. 14 is a schematic structural view of the independent guide pillar and guide sleeve mechanism of the present invention;

fig. 15 is a schematic structural view of the tension spring of the present invention;

fig. 16 is a schematic structural view of the spring pin of the present invention.

The reference numerals in the schematic drawings illustrate:

1. a track; 2. a pedal assembly; 201. a pedal; 202. a pedal support plate; 203. an uphill segment; 204. a horizontal segment; 205. a downhill section; 301. a first sliding plate; 302. a second sliding plate; 4. a fixed plate assembly; 401. a main fixing plate; 402. an end fixing plate; 403. an upper sealing plate; 404. a middle fixing plate; 5. a floor assembly; 501. a bottom support plate; 502. a first track platen; 503. a platen bolt; 504. a platen nut; 505. a draw bar bolt; 506. fixing the ear; 507. reinforcing ribs; 508. a second track press plate; 6. a lifting drive mechanism; 601. a servo electric cylinder; 602. a piston rod; 603. a connecting nut; 604. connecting blocks; 605. a bearing; 701. a first slide rail; 702. a second slide rail; 703. a third slide rail; 704. a fourth slide rail; 705. a fifth slide rail; 8. an elastic element; 801. an elastic element support; 802. an elastic element adjusting plate; 803. an elastic element support plate; 804. a spring pin; 805. hooking a groove; 901. a displacement sensing plate; 10. a displacement sensor mounting plate; 11. a guide sleeve and guide post mechanism; 1101. a base; 1102. a guide sleeve; 1103. a liner; 1104. a guide post; 1201. a first magnetic steel; 1202. a second magnetic steel; 13. a front-end mechanism; 1401. a first detection mechanism; 1402. a second detection mechanism; 1403. and a third detection mechanism.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

Example 1

With reference to fig. 1, the wheel radial runout detection system of the present embodiment includes a front-end mechanism 13 and a detection mechanism, which are sequentially installed on the inner side of a track along the warehousing direction of a train, where the front-end mechanism 13 is configured to detect the rim height of a wheel to be detected, and the detection mechanism is configured to detect the radial runout of the wheel. The detection mechanism and the front-end mechanism 13 are both connected with the control system in a control mode, and the control system controls the start and stop of the front-end mechanism 13 and the detection mechanism.

The embodiment adds the front-end mechanism in front of the detection mechanism (the direction of train entering a garage), measures the rim height of the wheel to be detected through the front-end mechanism 13, controls the lifting driving mechanism 6 to operate through the control system according to the measured rim height and the current position of the detection mechanism, and adjusts the initial height of the detection mechanism, so as to ensure that the prepressing amount of the detection mechanism belongs to the set range, further reduce the impact force on the detection mechanism when the wheel rapidly impacts the detection mechanism, prolong the service life of the mechanism, and reduce the influence of impact vibration on the detection precision. Here, the preload is a magnitude of a vertical displacement of the pedal assembly generated when the pedal assembly of the wheel pressure detecting mechanism is pressed. The embodiment does not require the structure of the front-end mechanism, can directly adopt the existing any wheel rim height online detection device, and only needs to detect the rim height of the wheel.

With reference to fig. 4-11, the detecting mechanism of the present embodiment includes a pedal assembly 2, a first sliding plate 301, a fixed plate assembly 4, and a guide post and guide bushing mechanism 11, wherein the pedal assembly 2 and the fixed plate assembly 4 are parallel to each other and the first sliding plate 301 passes through the guide post and guide bushing mechanism 11 and is slidably connected to each other through a slide rail mechanism, the first sliding plate 301 is connected to the lifting driving mechanism 6, and an elastic element 8 is disposed between the first sliding plate 301 and the pedal assembly 2; the pedal assembly 2 is provided with a displacement sensing plate 901, and the first sliding plate 301 is correspondingly provided with a displacement sensor.

The train wheel comprises a tread part and a rim part, the tread is out of round due to long-term contact and abrasion with the rail, and the rim is still a standard circle without contact with other objects. Therefore, when the wheel tread is in contact with the steel rail at different positions, the distances from the top points of the wheel rims to the top surface of the steel rail are different. According to the embodiment, the pedal assembly 2 is installed on the rail, when a wheel passes through, the top surface of the pedal assembly 2 is always kept in contact with the top point of the wheel rim, the pedal assembly 2 generates downward displacement under the pressing action of the wheel rim, the displacement is changed along with the difference of the contact points of the tread and the rail, the change of the displacement of the pedal assembly 2 in the process that the wheel passes through the pedal assembly 2 is collected, and the radial runout of the wheel can be detected.

In actual use, the wheel rim heights of all wheels on a train are different, the pedal assembly 2 is higher than the wheel rim by a certain value during measurement to serve as a pre-pressing amount, the pre-pressing amount cannot be too large, otherwise the wheels can seriously impact the pedal assembly 2, so that the pedal assembly 2 is damaged, and the measurement precision is reduced; the pre-load must also not be too small, otherwise the wheel rim will not press the pedal assembly 2, resulting in no detectable data. In this embodiment, the pedal assembly 2, the first sliding plate 301 and the fixed plate assembly 4 are designed in a split structure, and the lifting driving mechanism 6 is used in cooperation, so that the tread defect of the wheel can be measured, and the initial height of the pedal assembly 2 can be adjusted at the same time, thereby meeting the measurement requirements of wheels with different wheel rims and high wheel heights, reducing the impact of the wheels on the pedal assembly 2 and ensuring the measurement accuracy. Specifically, before the train arrives, the first sliding plate 301 is driven to lift relative to the fixed plate assembly 4 through the lifting driving mechanism 6 according to the rim height of the train wheel to be detected, and the pedal assembly 2 and the first sliding plate 301 lift synchronously, so that the initial height of the pedal assembly 2 is adjusted. When the height of the pedal assembly 2 reaches a set value, the lifting driving mechanism 6 stops working.

After the train wheels press the pedal assembly 2, under the rolling action of the wheels, the pedal assembly 2 moves downwards relative to the first sliding plate 301 along the sliding rail mechanism, at this time, under the supporting action of the lifting driving mechanism 6, the first sliding plate 301 does not slide relative to the fixed plate assembly 4, and then the distance between the displacement sensing plate 901 and the displacement sensor changes; when the train wheel leaves the pedal assembly 2, the pedal assembly 2 gradually moves upwards along the sliding rail mechanism to perform restoring motion relative to the first sliding plate 301 under the action of restoring force of the elastic element 8, and radial run-out, tread scratch and abrasion data of the train wheel tread can be obtained by processing distance change data between the displacement sensing plate 901 and the displacement sensor, so that on-line dynamic measurement of train wheel defects is realized, and the measurement efficiency is greatly improved. This embodiment is through carrying out optimal design to detection device's structure, leads to the removal of footboard assembly 2 with the help of slide rail mechanism to make it carry out the motion of replying through elastic element 8's effect, thereby for current parallelogram measuring mechanism, measuring device's structural stability and measurement accuracy have all obtained effective improvement.

Specifically, if the wheel tread is not scratched, the vertical position of the wheel tread relative to the steel rail in the whole tread circumference is unchanged, and the measurement value of the corresponding displacement sensor is also unchanged relatively; on the contrary, if the tread of the wheel is scratched or unevenly worn, the relative height from the tread to the top of the wheel rim is changed, the vertical position of the pedal assembly 2 and the steel rail is also changed relatively, and the variation of the measurement value of the displacement sensor is the scratch amount. Meanwhile, the measured value is compared with a new wheel without abrasion, and the abrasion loss of the wheel tread can be obtained.

The first sliding plate 301 is vertically displaced only when the height of the pedal assembly 2 needs to be adjusted, that is, the lifting driving mechanism 6 works, and when the wheel presses on the pedal assembly 2, the first sliding plate 301 remains stationary, and the pedal assembly 2 is displaced relative to the first sliding plate 301. The first sliding plate 301 is supported by an intermediate lifting drive mechanism 6, and the movement direction is limited by a sliding rail between the first sliding plate 301 and the fixed plate assembly 4. Because of processing and assembling errors, it is difficult to ensure that the displacement of the first sliding plate 301 during lifting is strictly vertical, and it is also difficult to ensure that the first sliding plate 301 does not displace when the wheel presses on the pedal assembly 2, therefore, in this embodiment, two guide post and guide sleeve mechanisms 11 are added on the first sliding plate 301, so that the first sliding plate 301 can be effectively limited to be displaced only along the direction constrained by the guide post and guide sleeve mechanisms 11, thereby reducing the measurement error and improving the measurement precision.

Example 2

The wheel diameter jump detection system of the present embodiment is basically the same as embodiment 1 in structure, and the difference is mainly that: the detection mechanisms of the embodiment are symmetrically arranged on the inner sides of the tracks at two sides, the number of the detection mechanisms at the same side is more than or equal to 2, and the sum of the lengths of the detection mechanisms at each side is greater than the circumference of the wheel, so that the circumferential data of the wheel tread, which is greater than the circumference of the wheel, can be detected, the requirements for detection of different front and rear wheels can be met, and the influence of the fact that the front wheel does not leave the detection mechanism and the rear wheel enters the detection mechanism on a detection result is prevented. The first detecting means is kept at a certain distance from the front-end means 13, and the time taken for the wheel to travel the distance can meet the time taken for the detecting means to adjust the amount of preload.

In this embodiment, a triggering mechanism is further disposed in front of the front-end mechanism 13, and the triggering mechanism includes a first magnetic steel 1201 and a second magnetic steel 1202 that are disposed at intervals along the inner side of the unilateral rail. The train can be judged to enter and exit according to the triggering sequence of the first magnetic steel 1201 and the second magnetic steel 1202, so that whether the front-end mechanism 13 and the detection mechanism are started or not can be conveniently determined. Specifically, when the triggering sequence of the magnetic steels is a first magnetic steel 1201-a second magnetic steel 1202, the train is put in a warehouse, and the front-end mechanism and the detection mechanism are started to prepare for wheel detection; when the triggering sequence of the magnetic steels is the second magnetic steel 1202-the first magnetic steel 1201, the train is taken out of the warehouse, all detection mechanisms are not started, when the train is taken out of the warehouse, the equipment is not started, the detection mechanisms are in an avoiding state, the wheels are not in contact with the mechanism, the impact force and the friction force between the wheels and the detection mechanisms when the train is taken out of the warehouse are eliminated, the mechanism is protected, and the automatic detection of the equipment is realized. Therefore, the magnetic steel arranged at the front end of the equipment is used as an external trigger signal, so that the equipment can be controlled to start. Meanwhile, the speed of the train can be measured by installing the first magnetic steel 1201 and the second magnetic steel 1202, and when the installation distance is known, the time interval of triggering the two magnetic steels is recorded, so that the speed of the train can be calculated.

Example 3

The wheel diameter jump detecting system of the present embodiment is basically the same as embodiment 2 in structure, and the difference is mainly that: the embodiment further comprises a bottom plate assembly 5, wherein the bottom plate assembly 5 is fixedly installed below the track 1, and the fixing plate assembly 4, the lifting driving mechanism 6 and the guide post and guide sleeve mechanism 11 are all fixedly installed on the bottom plate assembly 5. As shown in fig. 14, the guide post and guide sleeve mechanism 11 of the present embodiment includes a base 1101, a guide sleeve 1102 and a guide post 1104, wherein the base 1101 is fixedly installed on the bottom plate assembly 5, the guide sleeve 1102 is fixedly installed on the upper portion of the first sliding plate 301, the bottom of the guide post 1104 is fixedly installed on the base 1101, the upper portion of the guide sleeve 1102 passes through the guide sleeve 1102, an inner liner 1103 is further disposed between the guide sleeve 1102 and the guide post 1104, and a ball is disposed on the inner liner 1103.

Example 4

The wheel diameter jump detecting system of the present embodiment is basically the same as embodiment 3 in structure, and the difference is mainly that: as shown in fig. 12, the bottom plate assembly 5 of this embodiment includes a bottom support plate 501, a first rail pressing plate 502 and a second rail pressing plate 508 are disposed on the bottom support plate 501, the first rail pressing plate 502 is fixedly connected to the bottom support plate 501 through a pressing plate bolt 503, and two sides of the bottom of the track 1 are respectively pressed and fixed between the first rail pressing plate 502, the second rail pressing plate 508 and the bottom support plate 501; the bottom support plate 501 is further provided with a pressing plate nut 504, a seam which is profiled with the side edge of the bottom of the track 1 is processed on the pressing plate nut 504, and the pressing plate nut 504 is fixedly connected with a fixing lug 506 at the bottom of the bottom support plate 501 through a pull rod bolt 505. When the pull rod bolt 505 fastens the pressing plate nut 504 through the fixing lug 506, the nip distance between the pressing plate nut 504 and the second rail pressing plate 508 is reduced, so that the bottom plate assembly 5 and the steel rail are tightly fixed together; the bottom support plate 501 is then further fastened to the rail by the platen bolts 503 and the first rail platen 502. In this embodiment, the two sides of the bottom supporting plate 501 are further provided with reinforcing ribs 507, the bottom supporting plate 501 and the reinforcing ribs 507 are integrated, and a casting or welding mode can be adopted to ensure the integral rigidity of the mechanism so as to meet the requirement of the measurement accuracy of the whole mechanism.

The sliding rail mechanisms all comprise sliding blocks and guide rails which are matched with each other, the sliding blocks are respectively and fixedly installed on the pedal assembly 2 and the fixed plate assembly 4 in the embodiment, the first sliding plate 301 is correspondingly provided with the guide rails which are in sliding fit with the sliding blocks, the sliding rail mechanism between the first sliding plate 301 and the fixed plate assembly 4 is vertically installed relative to the first sliding plate 301, and the sliding rail mechanism between the first sliding plate 301 and the pedal assembly 2 is obliquely installed relative to the first sliding plate 301, so that the structural stability of the whole device is improved, and the impact of wheels on the measuring device is effectively reduced.

Example 5

The wheel diameter jump detecting system of the present embodiment is basically the same as embodiment 4 in structure, and the difference is mainly that: in this embodiment, a second sliding plate 302 is further disposed between the first sliding plate 301 and the fixed plate assembly 4, the second sliding plate 302 is connected to the first sliding plate 301 through a bearing, and is connected to the fixed plate assembly 4 through a sliding rail mechanism, and the displacement sensor is correspondingly mounted on the second sliding plate 302. Specifically, a displacement sensor mounting plate 10 is fixedly mounted above the second sliding plate 302 (a relief hole corresponding to the guide pillar is formed in the displacement sensor mounting plate 10), and the displacement sensor is fixedly connected to the displacement sensor mounting plate 10 and located above the displacement sensing plate 901.

Although the gap of the guide post and guide bush mechanism 11 is small, there is still a gap, and when the wheel presses the pedal assembly 2, the first sliding plate 301 still slightly tilts, and the tilt is small enough to affect the measurement accuracy of the device. Based on the above problems, the present embodiment adds the second sliding plate 302 between the first sliding plate 301 and the fixed plate assembly 4, and connects the displacement sensor to the second sliding plate 302, and the second sliding plate 302 is connected to the first sliding plate 301 through the bearing, so that when the wheel presses up the pedal assembly 2 to incline the first sliding plate 301, the second sliding plate 302 does not incline, thereby not affecting the accuracy of data measurement.

Example 6

The wheel diameter jump detecting system of the present embodiment is basically the same as that of embodiment 5 in structure, and the difference is mainly that: as shown in fig. 13, the lifting driving mechanism 6 of the present embodiment includes a servo electric cylinder 601, the servo electric cylinder 601 includes a servo motor and a cylinder body, a piston rod capable of lifting is disposed in the cylinder body, the cylinder body of the servo electric cylinder 601 is fixedly mounted on the bottom plate assembly, a free end of the piston rod 602 is fixedly connected to a connecting block 604, and the connecting block 604 is fixedly connected to the first sliding plate 301. The piston rod is driven to lift through the transmission component in the cylinder body, so that the first sliding plate 301 is driven to move up and down.

Specifically, in this embodiment, the free end of the piston rod 602 is connected with the connecting block 604 in a threaded manner and is locked by the connecting nut 603, the connecting block 604 is processed into an L-shaped structure, and the first sliding plate 301 is supported and mounted on the connecting block 604 and is fastened by bolts. The piston rod 602 is provided with a coupling nut 603 in advance, and after the piston rod 602 is connected with the connecting block 604, the coupling nut 603 is screwed up to tightly fix the piston rod 602 and the connecting block 604.

As shown in fig. 2, the wheel diameter jump detection method of the present embodiment includes the following steps:

step one, judging whether a train enters or exits a warehouse

Judging the warehousing and ex-warehousing of the train through the triggering sequence of the triggering unit, and if the train is warehousing, controlling the front-end mechanism 13 and the detection mechanism to start through the control system to prepare for wheel detection; if the train is delivered from the warehouse, the front-end mechanism 13 and the detection mechanism are not started;

step two, detecting the rim height of the train wheel

When the train is put in storage and passes through the front-end mechanism 13, the front-end mechanism 13 detects the rim height of the train wheels and feeds the rim height back to the control system;

step three, adjusting the prepressing amount of the pedal assembly of the detection mechanism

According to the detection result of the front-end mechanism 13, the lifting driving mechanism 6 is controlled to operate through the control system, so that the initial height of the pedal assembly 2 in the detection mechanism is adjusted, and when the prepressing amount of the pedal assembly 2 is within the set range, the lifting driving mechanism 6 stops operating.

The control mode of the prepressing amount of the pedal assembly is as follows: when the system is started, when the front setting mechanism detects that the height of the wheel rim is Sh1, the system judges whether the height of the wheel rim reaches the prepressing amount of 1.5-2mm, if the prepressing amount is in the range, the detection mechanism does not need to act, and if the height of the wheel rim is not in the range, a servo motor of the detection mechanism controls the pedal assembly to ascend and descend to the position W2, so that the height of the wheel rim Sh1 reaches the prepressing amount of 1.5-2 mm. When the front setting mechanism 13 detects that the rim height of the rear wheel is Sh2 and the front wheel passes through the detection mechanism, the detection mechanism judges whether the current W2 position is in the range that the pre-pressing amount of the rim height Sh2 is 1.5-2mm or not and performs corresponding lifting adjustment until the wheels of the complete train are detected. When the front-end mechanism 13 no longer generates new rim height within a period of time, the train is considered to have passed the detection system, the front-end mechanism 13 and the detection mechanism return to zero positions, and the system stops working. In the process of adjusting the prepressing amount of the detection mechanism, the preposition mechanism 13 is always positioned at the position W1 and is unchanged, and a plurality of sets of detection mechanisms of the steel rail at each side are lifted to the same position each time.

Step four, detecting radial runout of the tread of the train wheel

When the train wheel passes through the detection mechanism, the detection mechanism detects the radial run-out of the tread of the train wheel.

Example 7

The wheel diameter jump detecting system of the present embodiment is basically the same as embodiment 6 in structure, and the difference is mainly that: in this embodiment, a stepped hole is formed in a vertical plate of the connecting block 604, the diameter of a large hole of the stepped hole is just matched with that of the bearing outer ring, and the diameter of a small hole of the stepped hole is smaller than that of the bearing outer ring, so that the stepped hole is used as a bearing retainer ring. The bearing 605 is installed in the step hole, and a bearing pin is installed in the second sliding plate 302, and the bearing pin is inserted into the bearing 605 and hinged to the connecting block 604.

The first sliding plate 301 tilts bringing the connecting block 604 together, but the articulation of the bearing 605 may keep the second sliding plate 302 from tilting. The second sliding plate 302 is provided with fifth sliding rails 705 at two ends, the sliding block part of the fifth sliding rails 705 is connected with the second sliding plate 302, and the guide rail part is connected with the fixed plate assembly. Therefore, when the servo electric cylinder is lifted, the second sliding plate 302 can be driven to be lifted together.

The specific process of detection by adopting the detection mechanism of the embodiment is as follows:

step one, adjusting the height of a pedal assembly: according to the rim height of the train wheel to be detected, the lifting driving mechanism 6 drives the first sliding plate 301 to lift, at the moment, no relative motion exists between the pedal assembly 2 and the first sliding plate 301 and between the pedal assembly 2 and the second sliding plate 302, the pedal assembly 2 and the second sliding plate 302 lift synchronously along with the first sliding plate 301, and when the pedal assembly 2 lifts to a specified position, the lifting driving mechanism 6 stops working;

step two, the wheel detection process: when a wheel presses the pedal assembly 2, the pedal assembly 2 is pressed by the wheel rim to generate displacement in a direction obliquely downward along the slide rail, in the descending process of the pedal assembly 2, the first sliding plate 301 and the second sliding plate 302 are kept stationary relative to the fixed plate assembly 4, at this time, the displacement sensor generates relative displacement relative to the displacement sensing plate 901, and the displacement of the pedal assembly 2 pressed by the wheel rim when the wheel passes is obtained through conversion; the radial run-out condition of the train wheel tread can be obtained by processing the data acquired by the displacement sensor in the perimeter of the whole wheel tread;

step three, when the wheels leave, the pedal assembly 2 is restored to the initial position under the action of the elastic element 8; at this time, the lifting driving mechanism 6 continues to start to drive the pedal assembly 2 to descend to a specified position, no matter what the rim height of the passing wheel is, the rim of the wheel cannot press the pedal assembly 2.

Specifically, when the length of the pedal assembly 2 is greater than the wheel circumference, the circumferential data of one circle of the wheel tread can be detected, and the out-of-round condition of the wheel tread can be further depicted. The displacement curve of each detection mechanism pedal assembly 2 is intercepted and spliced to obtain a displacement curve of the pedal assembly 2 from the first detection mechanism to the last detection mechanism, and a maximum value and a minimum value are obtained from the displacement curve, wherein the difference value of the maximum value and the minimum value is the radial runout value of the wheel.

There are two methods for controlling the detection mechanism pedal assembly 2 to lift to the appropriate pre-pressure amount by the system, namely a table look-up method and a tracking method. The table look-up method is to divide the minimum rim height to the maximum rim height into n intervals, each interval corresponds to a position Wn of the pedal assembly 2 of the different detection mechanism, when the front mechanism 13 detects the rim height Sh of the wheel to be detected, the interval to which the rim height belongs is judged, and then the pedal assembly 2 of the detection mechanism is lifted to the position W corresponding to the interval. The tracking method is to use the displacement sensor as a feedback signal and continuously adjust the position of the pedal assembly 2 of the detection mechanism until the indication value of the displacement sensor reaches the indication value under the required pre-pressure amount. For example, when the current indication value of the displacement sensor is Z1, and the front-mounted mechanism detects the rim height Sh of the wheel to be detected, the system calculates the indication value Z2 that the displacement sensor needs to reach according to the pre-pressure amount, then the servo motor is started to lift, and in the process of lifting the motor, the indication value of the displacement sensor is continuously changed and is transmitted to the servo motor as a feedback signal, and when the indication value of the displacement sensor reaches Z2, the pedal assembly 2 of the detection mechanism is considered to have lifted to the required position, and then the motor is turned off.

Example 8

The wheel diameter jump detecting system of the present embodiment is basically the same as embodiment 7 in structure, and the difference is mainly that: referring to fig. 4 to 10, the fixing plate assembly 4 of the present embodiment includes a main fixing plate 401, end fixing plates 402 disposed at two ends of the main fixing plate 401, and an upper sealing plate 403 disposed on top of the main fixing plate 401, wherein the main fixing plate 401, the end fixing plates 402, and the upper sealing plate 403 together surround to form a box-type structure. The first sliding plate 301 is slidably connected to the pedal assembly 2 through a first sliding rail 701, slidably connected to the main fixing plate 401 through a second sliding rail 702, and slidably connected to the end fixing plate 402 through a third sliding rail 703, and the second sliding plate 302 is located between the first sliding plate 301 and the main fixing plate 401, so that the stability of the whole device structure and the stability of the sliding plate during up-and-down movement can be further improved, and the measurement accuracy can be ensured (the guide post is fixedly mounted between the bottom plate assembly and the upper sealing plate 403). Preferably, in this embodiment, an intermediate fixing plate 404 is further disposed between the first sliding plate 301 and the pedal assembly 2, the first sliding plate 301 and the intermediate fixing plate 404 are slidably connected through a fourth sliding rail 704, the main fixing plate 401, the end fixing plate 402, the upper sealing plate 403 and the intermediate fixing plate 404 together surround to form a relatively closed box-type structure, and the first sliding plate 301 is installed inside the box-type fixing plate assembly.

Example 9

The wheel diameter jump detecting system of the present embodiment is basically the same as that of embodiment 8 in structure, and the difference is mainly that: two ends of the elastic element 8 are respectively fixedly connected with the first sliding plate 301 and the pedal assembly 2, and the installation direction of the elastic element 8 is parallel to the installation direction of the sliding rail mechanism between the first sliding plate 301 and the pedal assembly 2. Specifically, as shown in fig. 15 and 16, the elastic element 8 of the present embodiment is a tension spring, both ends of the tension spring are provided with spring hooks, the pedal assembly 2 and the first sliding plate 301 are respectively provided with spring pins 804 (the height of the spring pin on the pedal assembly 2 is lower than that of the spring pin on the first sliding plate 301), the spring pins 804 are respectively provided with hook grooves 805 corresponding to the spring hooks, and both ends of the tension spring are respectively hooked and installed in the spring hook grooves through the spring hooks. When the wheel rolls on the pedal assembly 2, the pedal assembly 2 moves downward, thereby stretching the elastic member 8 downward, and when the wheel gradually leaves the pedal, the pedal assembly 2 gradually recovers under the action of the elastic member 8.

Example 10

The wheel diameter jump detecting system of the present embodiment is basically the same as that of embodiment 9 in structure, and the difference is mainly that: as shown in fig. 10, the elastic element 8 of this embodiment is a compression spring, one end of the compression spring is fixedly mounted on the first sliding plate 301 through an elastic element support 801, the pedal assembly 2 is provided with an elastic element support plate 803 corresponding to the other end of the compression spring (the height of the elastic element support plate 803 is greater than the height of the elastic element support 801), an elastic element adjusting plate 802 is correspondingly disposed on the first sliding plate 301 above the elastic element support plate 803, a threaded hole is processed on the elastic element adjusting plate 802, a jackscrew passes through the threaded hole and butts against the elastic element support plate 803, i.e., the jackscrew is used to adjust the pre-pressure of the spring, and after being adjusted to a predetermined position, the jackscrew is fastened by using a nut. When the wheel rolls on the pedal assembly 2, the pedal assembly 2 drives the elastic member supporting plate 803 to move downward, thereby further compressing the elastic member 8, and when the wheel gradually leaves the pedal, the pedal assembly 2 gradually recovers under the action of the elastic member 8.

Example 11

The wheel diameter jump detecting system of the present embodiment is basically the same as that of embodiment 10 in structure, and the differences are mainly that: as shown in fig. 6, the pedal assembly 2 of the present embodiment includes a pedal 201 and a pedal support plate 202, the pedal 201 being mounted on the pedal support plate 202; the displacement sensing plate 901, the first slide rail 701, the elastic element supporting plate 803 and the spring pin 804 are all mounted on the pedal supporting plate 202. The pedal is in a long strip shape, the length of the pedal is determined to be arranged in sections according to the number of actually arranged measuring mechanisms, and the total length of the pedals of the plurality of detecting mechanisms is not less than the circumference of the tread of the wheel.

Example 12

The wheel diameter jump detecting system of the present embodiment is basically the same as embodiment 11 in structure, and the difference is mainly that: the structure and the detection mechanism of the front-end mechanism 13 of this embodiment are as shown in fig. 3, wherein the upper surface of the pedal of the front-end mechanism 13 sequentially includes an ascending section 203, a horizontal section 204 and a descending section 205 along the direction of entering the train, when a wheel passes through the front-end mechanism 13, a maximum displacement value is generated in the horizontal section 204 of the pedal assembly 2, and the rim height of the wheel can be measured according to the maximum value, and the specific method is as follows: when a wheel with a known rim height of Sh1 passes through the front-end mechanism 13, the maximum displacement of a pedal of the front-end mechanism 13 is h1, and when a wheel with an unknown rim height passes through the front-end mechanism, the maximum displacement of the pedal of the front-end mechanism is h2, the rim height of the unknown wheel, Sh2, is Sh1+ (h2-h 1).

Example 13

The wheel diameter jump detecting system of the present embodiment is basically the same as that of embodiment 12 in structure, and the differences are mainly that: the detection mechanism inside each side rail in this embodiment includes a first detection mechanism 1401, a second detection mechanism 1402, and a third detection mechanism 1403.

When the magnetic steel detects that the train is put in storage, the detection system is started, the front-end mechanism and the three sets of detection mechanisms rise to the specified position, and the process is completed before the train reaches the front-end mechanism. When the front mechanism detects the rim height of the first wheel, the three sets of detection mechanisms are combined with the current position to judge whether the rim height meets the requirement that the prepressing amount is 1.5-2mm, if not, the PLC controls the servo motor to ascend and descend to the position meeting the condition, and the process is completed before the wheel to be detected reaches the first detection mechanism 1401. After the first detection mechanism 1401 finishes acting, LOG data recording is started, vertical displacement of the pedals when the wheel passes through each detection mechanism is recorded, and LOG data recording is stopped when the wheel leaves the third detection mechanism 1403. When the front-mounted mechanism detects that the rim of the second wheel is high, the first wheel does not pass through the detection mechanism, each detection mechanism judges whether the first wheel leaves or not at first, if the first wheel leaves, the detection mechanism ascends and descends to a proper position according to the current position and the rim of the second wheel, and if the first wheel does not leave or reaches the detection mechanism, the detection mechanism starts to ascend and descend after the first wheel leaves. Each time the first detecting means 1401 finishes lifting, the system starts one LOG data recording, and similarly, each time the third detecting means 1403 detects that the wheel is separated, the previous LOG data recording is stopped. And when the front-end mechanism has no new value, the system considers that the train passes through the detection mechanism, and the front-end mechanism and the detection mechanism return to the initial position.

The data that the displacement sensor who will three sets of detection mechanism gathered all send the host computer to, and what the size of this data reflection is the size of the relative value of the different circumferential position rim heights of wheel tread, when footboard length is greater than wheel week length, can detect the circumferential data of wheel tread a week, further draws out the out-of-round condition of wheel tread. The upper computer intercepts and splices the displacement curve of each detection mechanism pedal to obtain a pedal displacement curve from the first detection mechanism 1401 to the third detection mechanism 1403, and the maximum value and the minimum value are obtained from the pedal displacement curve, and the difference value between the maximum value and the minimum value is the radial runout value of the wheel.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A contact method wheel diameter jump detecting system is characterized in that: the device comprises a front-end mechanism (13) and a detection mechanism which are sequentially arranged on the inner side of a track along the warehousing direction of a train, wherein the front-end mechanism (13) is used for detecting the rim height of a wheel to be detected, the detection mechanism is used for detecting the radial runout of the wheel, the detection mechanism comprises a pedal assembly (2), a first sliding plate (301) and a fixed plate assembly (4) which are arranged on the inner side of the track (1) and are parallel to each other, and further comprises a guide post and guide sleeve mechanism (11), the first sliding plate (301) penetrates through the guide post and guide sleeve mechanism (11) and is connected with the pedal assembly (2) and the fixed plate assembly (4) in a sliding mode through a sliding rail mechanism, and an elastic element (8) is arranged between the first sliding plate (301) and a lifting driving mechanism (6) and the pedal assembly (2); the pedal assembly (2) is provided with a displacement sensing plate (901), and the first sliding plate (301) is correspondingly provided with a displacement sensor.

2. The contact method wheel runout detecting system according to claim 1, characterized in that: the detection mechanisms are symmetrically arranged on the inner sides of the tracks at the two sides, and the number of the detection mechanisms at the same side is more than or equal to 2; the front of the front-end mechanism (13) is also provided with a trigger mechanism, and the trigger mechanism comprises a first magnetic steel (1201) and a second magnetic steel (1202) which are arranged along the inner side of the unilateral rail at intervals.

3. A contact wheel runout detecting system according to claim 1 or 2, wherein: a guide sleeve (1102) of the guide post and guide sleeve mechanism (11) is fixedly arranged at the upper part of the first sliding plate (301), a guide post (1104) penetrates through the guide sleeve (1102) and a lining (1103) is arranged between the guide post and the guide sleeve (1102), and balls are arranged on the lining (1103); the bottom end of the guide post (1104) is fixedly arranged on the bottom plate assembly (5), and the bottom plate assembly (5) is fixedly arranged below the track (1).

4. A contact wheel runout detecting system according to claim 1 or 2, wherein: a second sliding plate (302) is further arranged between the first sliding plate (301) and the fixed plate assembly (4), the second sliding plate (302) is connected with the first sliding plate (301) through a bearing, the second sliding plate is connected with the fixed plate assembly (4) through a sliding rail mechanism, and the displacement sensor is correspondingly arranged on the second sliding plate (302).

5. The contact method wheel runout detecting system according to claim 4, wherein: the lifting driving mechanism (6) comprises a servo electric cylinder (601), the free end of a piston rod (602) of the servo electric cylinder (601) is fixedly connected with a connecting block (604), and the connecting block (604) is fixedly connected with the first sliding plate (301); a bearing (605) is installed in the connecting block (604), a bearing pin is arranged in the second sliding plate (302), and the bearing pin is inserted into the bearing (605) and hinged with the connecting block (604).

6. A contact wheel runout detecting system according to claim 1 or 2, wherein: the fixing plate assembly (4) comprises a main fixing plate (401), end fixing plates (402) positioned at two ends of the main fixing plate (401) and an upper sealing plate (403) positioned at the top of the main fixing plate (401), wherein the main fixing plate (401), the end fixing plates (402) and the upper sealing plate (403) jointly surround to form a box-type structure; the first sliding plate (301) is connected with the pedal assembly (2) in a sliding mode through a first sliding rail (701), connected with the main fixing plate (401) in a sliding mode through a second sliding rail (702), and connected with the end fixing plate (402) in a sliding mode through a third sliding rail (703); an intermediate fixing plate (404) is further arranged between the first sliding plate (301) and the pedal assembly (2), and the first sliding plate (301) is connected with the intermediate fixing plate (404) in a sliding mode through a fourth sliding rail (704).

7. The contact method wheel runout detecting system according to claim 6, wherein: the first sliding rail (701) is obliquely arranged relative to the first sliding plate (301), and the second sliding rail (702), the third sliding rail (703) and the fourth sliding rail (704) are vertically arranged relative to the first sliding plate (301).

8. The contact method wheel runout detecting system according to claim 7, wherein: the structure of the front-end mechanism (13) is the same as that of the detection mechanism, and the upper surface of the pedal assembly (2) sequentially comprises an ascending section (203), a horizontal section (204) and a descending section (205) along the warehousing direction of the train.