A load wheel and a track detection device

Abstract

The present invention provides a load-bearing wheel, which is arranged on the mounting frame of a track detection device. The load-bearing wheel includes: a support shaft, one end of which is fixedly connected to the mounting frame, and the other end is a free end; a load-bearing wheel body, which is rotatably sleeved on the support shaft and is used to abut against the rail and roll along the rail when the mounting frame moves. One side of the load-bearing wheel body close to the free end of the support shaft has a load-bearing wheel chamfer portion. The working mode of fixing the support shaft and rotating the load-bearing wheel body makes the structure of the load-bearing wheel more stable and has a better fit with the rail, which helps to improve the smoothness when the track detection device moves and further improves the accuracy of the detection result. The present invention also provides a track detection device, including: a mounting frame, which is movably arranged on the track; a track detection unit, which is arranged on the mounting frame and is used to detect the profile and upper surface defects of the track; and at least four load-bearing wheels, which are arranged at the bottom of the mounting frame to enable the track detection device to move forward smoothly and smoothly.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit, and particularly relates to a load-bearing wheel and a track detection device. Background Art

[0002] To ensure the safe operation of the track, it is necessary to regularly detect the track to timely discover problems such as surface chipping, wear, and rail surface deformation on the track, and promptly eliminate these problems. In the past, inspectors manually measured along the line multiple times using detection tools such as calipers. In this way, the detection efficiency is very low, and due to the large number of items that need to be measured and verified, and the limited time for line stop inspection and maintenance, it is often difficult to complete the measurement of all items within the limited time by manual means.

[0003] Therefore, to improve the detection efficiency, a track inspection vehicle has emerged. Multiple detectors such as line laser sensors are installed on the vehicle, and an encoder for measuring the moving distance is installed in the wheel. The inspector can push the track inspection vehicle to move along the track, obtain the profile of the track during the movement, and then perform calculation and analysis based on the obtained profile, so as to quickly complete the detection of the track.

[0004] The wheel structure of the existing track inspection vehicle is usually: one end of the rotating shaft is rotatably connected to the vehicle frame, and the wheel body is fixed to the other end of the rotating shaft and rotates synchronously with the rotating shaft. However, such a connection method causes a gap between the rotating shaft and the vehicle frame when the rotating shaft rotates, and the rotating shaft is prone to tilt under load, affecting the contact between the wheel and the track, making the equipment unstable during the forward movement. Especially when passing through a turnout, the track inspection vehicle is prone to tilt and shake, reducing the accuracy of the detection results. Summary of the Invention

[0005] The present invention is made to solve the above problems, and the purpose is to provide a load-bearing wheel and a track detection device. The present invention adopts the following technical solutions:

[0006] The present invention provides a load-bearing wheel, which is arranged on the installation vehicle frame of the track detection device. The installation vehicle frame is movably arranged on the track. It is characterized in that it includes: a support shaft, one end of which is fixedly connected to the installation vehicle frame, and the other end is a free end; a load-bearing wheel body, rotatably sleeved on the support shaft, used for abutting against the steel rail and rolling along the steel rail when the installation vehicle frame moves. Among them, one side of the load-bearing wheel body close to the free end of the support shaft has a load-bearing wheel chamfer portion.

[0007] The load-bearing wheel provided by the present invention may also have the following technical feature: among them, the chamfer length of the load-bearing wheel chamfer portion is 45 mm, and the chamfer slope is 12 mm:45 mm.

[0008] The load-bearing wheel provided by the present invention may further have the following technical feature: wherein, one side of the load-bearing wheel body close to the fixed end of the support shaft has a load-bearing wheel limiting portion adapted to the radian of the top edge of the rail.

[0009] The load-bearing wheel provided by the present invention may further have the following technical feature: wherein, a through cavity is formed inside the load-bearing wheel body and is consistent with the axis direction of the support shaft.

[0010] The load-bearing wheel provided by the present invention may further have the following technical feature, and further includes: two bearings, respectively embedded at the two side openings of the through cavity, and the support shaft is connected to the load-bearing wheel body through the bearings.

[0011] The load-bearing wheel provided by the present invention may further have the following technical feature: wherein, the load-bearing wheel body is made of an insulating material, and the insulation resistance value of the load-bearing wheel body is not less than 1 MΩ.

[0012] The load-bearing wheel provided by the present invention may further have the following technical feature: wherein, the load-bearing wheel body is made of ceramic or POM plastic.

[0013] The load-bearing wheel provided by the present invention may further have the following technical feature: wherein, an insulating layer is provided on the outer surface of the load-bearing wheel body.

[0014] The load-bearing wheel provided by the present invention may further have the following technical feature: wherein, the connection mode between the support shaft and the installation vehicle frame is screw connection.

[0015] The present invention provides a track detection device, which is characterized in that it includes: an installation vehicle frame movably arranged on the track; a track detection unit arranged on the installation vehicle frame for detecting the profile and upper surface defects of the track; and at least 4 load-bearing wheels arranged at the bottom of the installation vehicle frame, wherein the load-bearing wheels are the above-mentioned load-bearing wheels.

[0016] Function and effect of the invention

[0017] According to the load-bearing wheel and the track detection device of the present invention, since one end of the support shaft is firmly connected to the installation vehicle frame, it can better maintain the axial position and avoid tilting and shaking due to load during the movement; the load-bearing wheel body is rotatably sleeved on the support shaft and can abut against the rail and roll along the rail when the installation vehicle frame moves. The working mode of the fixed support shaft and the rotating load-bearing wheel body makes the structure of the load-bearing wheel more stable and the adaptability to the rail better, which helps to improve the smoothness of the track detection device during movement and further improve the accuracy of the detection result. One side of the load-bearing wheel body close to the free end of the support shaft has a load-bearing wheel chamfering portion, which can cooperate with the height difference between the switch rail and the wing rail at the turnout, and effectively improve the stability of the load-bearing wheel when passing through the switch rail and the wing rail.

[0018] The mounting frame in the track detection device is movably arranged on the track, and the track detection unit is arranged on the mounting frame, which can detect the profile and upper surface defects of the passing track while moving, with relatively high efficiency. At least four load wheels are arranged at the bottom of the mounting frame, which can reduce the friction between the mounting frame and the rail when moving, facilitating the operator to push the mounting frame, so that the mounting frame can move forward smoothly and smoothly. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the track detection device in an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of the load wheel in an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the cooperation between the load wheel and the rail in an embodiment of the present invention;

[0022] Figure 4 is Figure 3 a cross-sectional view of the A-A section in

[0023] Figure 5 is a schematic diagram of the turnout structure in an embodiment of the present invention;

[0024] Figure 6 is a schematic diagram of the cooperation between the distance detection unit and the rail in an embodiment of the present invention;

[0025] Figure 7 is a cross-sectional view of the distance detection unit in an embodiment of the present invention;

[0026] Figure 8 is a perspective view of a partial structure of the track detection unit in an embodiment of the present invention; and

[0027] Figure 9 is a schematic diagram of the relative positions of the line lasers projected by four line laser sensors and the track in an embodiment of the present invention. Detailed Embodiments

[0028] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the load wheel and the track detection device of the present invention will be specifically described below in conjunction with the embodiments and the drawings. The parts not detailed in the embodiments are well-known technologies in the art.

[0029] <Embodiment>

[0030] This embodiment provides a track detection device, which is placed on the track and used to detect the profile and upper surface defects of the track.

[0031] Figure 1 is a schematic structural diagram of the track detection device in an embodiment of the present invention.

[0032] As shown Figure 1 in FIG. 1, the track detection device 100 includes a mounting frame 10, two track detection units 20, at least four load wheels 30, two distance detection units 40, a trolley handle 50, and a computing device (only the computing device mounting rack 60 is shown in the figure). Among them, the mounting frame 10 is movably placed on the track through the load wheels 30 at the bottom. The track detection unit 20 is detachably mounted on the mounting frame 10 and is used to detect the profile and upper surface defects of the track passed by the track detection device 100. The trolley handle 50 is mounted on the upper part of the mounting frame 10 and is used for the detection personnel to grip when pushing the track detection device 100, facilitating the application of force. The computing device is used to receive the signals detected by the track detection unit 20 and perform calculation and analysis on them to obtain the detection result.

[0033] The mounting frame 10 is a metal frame and includes a frame main body 11 and a connecting portion 12. The frame main body 11 is a box-shaped shell approximately in a square shape. The connecting portion 12 is provided below the frame main body 11 and has four connecting ends 121. The four connecting ends 121 extend outward from the lower part of the frame main body 11 and are distributed in an X shape.

[0034] The four load wheels 30 are respectively fixedly mounted on the four connecting ends 121 of the connecting portion 12 through brackets. The four load wheels 30 are grouped in pairs and respectively correspond to two steel rails. The two distance detection units 40 are respectively mounted on two diagonally distributed connecting ends 121 through brackets, respectively corresponding to two steel rails, and the distance detection unit 40 is located between the two load wheels 30 on the same side.

[0035] Figure 2 FIG. 2 is a schematic structural diagram of the load wheel in the embodiment of the present invention.

[0036] As shown Figure 2 in FIG. 3, the load wheel 30 includes a load wheel body 31, a support shaft 32, and two bearings 33.

[0037] One end of the support shaft 32 is fixedly connected to the mounting frame 10, and the other end is a free end. In this embodiment, a triangular connecting flange 321 is provided at one end of the support shaft 32 and is fastened to the connecting end 121 by a screwing method. The extending direction of the support shaft 32 is parallel to the plane direction of the connecting portion 12. In practical applications, the support shaft can also be connected to the mounting frame 10 by riveting or welding methods.

[0038] Figure 3 FIG. 4 is a schematic diagram of the cooperation between the load wheel and the steel rail in the embodiment of the present invention, Figure 4 and Figure 3 FIG. 5 is a cross-sectional view of the A-A section in FIG. 4.

[0039] As shown Figure 3, 4 As shown in the figure, the load-bearing wheel body 31 is rotatably sleeved on the support shaft 32, and is used to abut against the rail 1 and roll along the rail 1 when the mounting vehicle frame 10 moves, so that the track detection device 100 moves along the track.

[0040] In this embodiment, the load-bearing wheel body 31 is made of an insulating material, preferably ceramic or POM plastic material, and the insulation resistance value of the load-bearing wheel body 31 is not less than 1 MΩ, so as to prevent the track detection device 100 from connecting and energizing the two rails and interfering with the track circuit system. In practical applications, other materials can also be used to make the load-bearing wheel body 31, and an insulating layer can be provided on the rolling surface where the load-bearing wheel body 31 contacts the rail, so that the range of available wheel body materials is wider, and the insulating layer can also achieve the insulation effect and prevent conduction between the load-bearing wheel body 31 and the rail.

[0041] In this embodiment, the load-bearing wheel body 31 is installed on the support shaft 32 through two bearings 33 and can rotate around the support shaft 32. A through cavity 34 is formed inside the load-bearing wheel body 31 and is consistent with the axis direction of the support shaft 32. The two bearings 33 are respectively embedded at the two side openings of the through cavity 34, and the support shaft 32 is connected to the load-bearing wheel body 31 through the two bearings 33, making the overall structure of the load-bearing wheel 30 more stable, reducing the shaking when the track detection device 100 moves, and realizing smooth advancement. The space inside the through cavity 34 is relatively large, and the support shaft 32 does not directly contact the inner wall of the through cavity 34, which can avoid the increase in friction when the load-bearing wheel body 31 rotates and is also convenient for installation.

[0042] The load-bearing wheel body 31 includes an integrally formed load-bearing wheel main body portion 311, a load-bearing wheel chamfer portion 312, and a load-bearing wheel limiting portion 313. The load-bearing wheel main body portion 311 is cylindrical. The load-bearing wheel limiting portion 313 is located on the side close to the fixed end of the support shaft, and the cross-sectional shape of the load-bearing wheel limiting portion 313 along the axial direction is adapted to the top edge arc of the I-shaped cross-section of the rail, which can improve the stability of the load-bearing wheel body 31 when rolling.

[0043] Figure 5 It is a schematic diagram of the turnout structure in the embodiment of the present invention.

[0044] Existing track systems usually include ordinary tracks composed of two parallel rails and turnouts for assisting trains to switch driving routes. As Figure 5 shown, the switch in the turnout includes two basic rails 2 (also called normal rails) and two switch rails 3 arranged between the two basic rails. The frog includes guard rails 4, a switch rail 5, and wing rails 6. The basic rails 2 in the ordinary track and the turnout are all made of rails with an I-shaped cross-section, while the switch rails 3, the switch rail 5, and the wing rails 6 in the turnout are rails with variable cross-sections. When the load-bearing wheel 30 passes through the frog, it will contact the switch rail 5 and the wing rail 6 at the same time, and there is a "reduction value" in the switch rail 5, that is, there is a designed height difference between the switch rail 5 and the wing rail 6.

[0045] The chamfered portion 312 of the load-bearing wheel is conical and extends outward from one end of the load-bearing wheel main body 311, with its diameter gradually decreasing. The chamfer length of the chamfered portion 312 of the load-bearing wheel is determined according to the load-bearing wheel body 31 and the rail tread, and the chamfer slope is determined according to the reduction value of the switch rail 5 and the vertical wear limit values of the switch rail 5 and the wing rail 6. In this embodiment, the chamfer length of the chamfered portion 312 of the load-bearing wheel is 45 mm, and the chamfer slope is 12 mm:45 mm, which can cooperate with the height difference between the switch rail 5 and the wing rail 6 at the turnout, effectively improving the stability of the load-bearing wheel 30 when passing through the switch rail 5 and the wing rail 6.

[0046] When the track detection device 100 moves on the I-shaped cross-section rail 1, the side surface of the load-bearing wheel main body 311 abuts against the top surface of the rail, the chamfered portion 312 of the load-bearing wheel is located outside the track, and the load-bearing wheel limiting portion 313 abuts against the inner edge of the top of the rail. When the track detection device 100 is placed on the track, it can move stably along the rail.

[0047] When the track detection device 100 moves at the turnout, since the load-bearing wheel body 31 of the load-bearing wheel 30 has the chamfered portion 312, it can guide the load-bearing wheel 30 to pass through the switch rail 5 and the wing rail 6 more smoothly, reduce the collision between the load-bearing wheel 30 and the rail, avoid the inclination and shaking of the installed vehicle frame 10, improve the stability of the movement of the track detection device 100, and make the detection result more accurate.

[0048] When the track detection device 100 moves under the push of the detection personnel, it rolls relative to the distance detection unit 40, and the moving distance (mileage) can be measured.

[0049] Figure 6 It is a schematic diagram of the cooperation between the distance detection unit and the rail in the embodiment of the present invention. Figure 7 It is a cross-sectional view of the distance detection unit in the embodiment of the present invention.

[0050] As Figure 6 、 7 shown, the distance detection unit 40 includes a mileage wheel bracket 41, a mileage wheel body 42, a rotating shaft 43, a distance detection encoder 44, and two spring assemblies 45.

[0051] Both ends of the rotating shaft 43 are rotatably connected to the mileage wheel bracket 41 respectively, and the mileage wheel body 42 is installed on the rotating shaft 43 and rotates synchronously with it. The outer shape of the mileage wheel body 42 is similar to the load-bearing wheel main body 311 and the chamfered portion 312 of the load-bearing wheel body 31, and will not be elaborated here.

[0052] The distance detection encoder 44 is fixed on the odometer wheel bracket 41 and is rotatably connected to the rotating shaft 43. One side of the odometer wheel body 42 has a mounting groove 421. The distance detection encoder 44 is located in the mounting groove 421 of the odometer wheel body 42, and the size of the mounting groove 421 is larger than that of the distance detection encoder 44. The distance detection encoder 44 does not come into direct contact with the odometer wheel body 42, avoiding affecting the rotation of the odometer wheel body 42 due to friction.

[0053] When the track detection device 100 is placed on the track, the odometer wheel body also abuts against the upper surface of the rail. As the track detection device 100 moves, the odometer wheel body 42 rotates accordingly, driving the rotating shaft 43 to rotate synchronously. The distance detection encoder 44 detects the rotation angle of the rotating shaft 43 to obtain the moving distance.

[0054] The spring assembly 45 includes a connecting column 451, a sleeve 452, and a spring member 453.

[0055] A connecting hole through which the connecting column 451 can pass is provided on the connecting end 121 of the connecting portion 12. One end of the connecting column 451 is screwed to the odometer wheel bracket 41, and the other end is movably passed through the connecting end 121 through the connecting hole. One end of the connecting column 451 near the connecting end 121 has a stepped structure, which can limit the moving position of the connecting column 451 and prevent the distance detection unit 40 from detaching from the connecting end 121.

[0056] The sleeve 452 is tubular, and its inner diameter is adapted to the connecting column 451. The sleeve 452 is sleeved on the connecting column 451 and can guide the connecting column 451. One end of the sleeve 452 near the connecting end 121 has a flange extending vertically outward from the pipe wall. The sleeve 452 is passed through the connecting end 121 through the connecting hole, and the lower surface of the flange abuts against the upper surface of the connecting end 121.

[0057] The spring member 453 is sleeved on the connecting column 451, one end abuts against the lower surface of the connecting end 121, and the other end abuts against the upper surface of the odometer wheel bracket 41, thereby pressing the odometer wheel body 42 against the rail by elastic force.

[0058] In the prior art, encoders are typically mounted directly on the load wheels. If the load wheels slip or jolt due to track surface defects, this can lead to inaccurate distance measurements, affecting the final detection results. In this embodiment, however, the distance detection unit 40 is independent of the load wheels 30 and connected to the mounting frame 10 via a spring assembly 45. During the detection process, when the load wheels 30 pass through gaps or uneven areas in the track, the spring assembly 45 presses the odometer wheel 42 against the track surface, preventing it from becoming suspended. This allows for accurate distance measurement and ensures the accuracy of the track detection results. Furthermore, when passing through a switch, any of the four load wheels 30 may become suspended. The distance detection unit 40 is independent of the load wheels 30, further avoiding the problem of inaccurate distance measurements caused by suspended load wheels 30. Therefore, the track detection device 100 of this embodiment can be used on both ordinary tracks and at switches, offering a wide range of applications and high detection accuracy.

[0059] Figure 8 This is a perspective view of a partial structure of a track detection unit in an embodiment of the present invention, showing the internal structure. Figure 8 Part of the shell structure is omitted.

[0060] like Figure 8 As shown, the track detection unit 20 includes a housing 21 , a plurality of baffles 22 , a handle 27 , a plurality of connecting brackets 23 , a plurality of reinforcing brackets 24 , a two-dimensional camera 25 and at least four line laser sensors 26 .

[0061] The shell 21 is a metal shell. Along the length direction of the shell 21, one side is in the shape of a rectangular parallelepiped for connecting to the mounting frame 10, and the other side has an inclined portion, and one end below the inclined portion further extends from the lower surface of the shell 21 to form a downward protrusion 211.

[0062] The housing 21 has openings on both sides in the width direction, and plastic baffles 22 are detachably mounted on the openings on both sides. This can reduce the overall weight of the track detection unit 20, and the internal sensors and cameras can be easily inspected by removing the baffles 22.

[0063] A handle 27 is fixedly mounted on the upper surface of the housing 21 and is provided for the inspector to grasp when removing the track detection unit 20. In this embodiment, the handle 27 is installed at an angle relative to the length of the housing 21. This allows the inspector to grasp the handle 27 more stably when removing the entire track detection unit 20, and prevents the track detection unit 20 from rotating.

[0064] The bottom of the shell 21 is open. When the track detection device 10 is placed on the track, there is no obstruction between the two-dimensional camera 25 and the four line laser sensors inside the shell 21 and a section of track directly below them.

[0065] Five connecting brackets 23 are fixedly installed inside the housing 21, and are respectively used for fixedly installing four line laser sensors and a two-dimensional camera 25. In this embodiment, the connecting bracket 23 is in the shape of a cuboid, and is provided with relief holes penetrating in the thickness direction thereof. The two ends in the length direction of the connecting bracket 23 are respectively fixedly installed on two surfaces of the housing 21 through a plurality of connecting members (screws), and the line laser sensors and the two-dimensional camera 25 are fixedly installed on the corresponding connecting brackets 23 through a plurality of connecting members (screws).

[0066] A plurality of reinforcing brackets 24 are fixedly installed inside the housing 21, and are used to enhance the structural strength of the housing 21. In this embodiment, the reinforcing brackets 24 are all in the shape of an X, and their ends are fixedly installed on two surfaces of the housing 21. One relatively large reinforcing bracket 24 is installed at a position close to the top surface of the housing 21, and the other relatively large one is installed inside the inclined part. A plurality of relief holes are also provided on these two relatively large reinforcing brackets 24. Two relatively small reinforcing brackets 24 are installed near the lower opening of the housing 21.

[0067] The two-dimensional camera 25 is fixedly installed inside the housing 21 through a connecting bracket 23, and its camera faces downward. When the track detection device 100 is placed on the track, the two-dimensional camera 25 faces the upper surface of the rail, and is used to capture an image of the upper surface of the rail, and this upper surface image is used for surface defects on the upper surface of the rail.

[0068] Figure 9 It is a schematic diagram of the relative positions of the line lasers projected by the four line laser sensors in the embodiment of the present invention and the track.

[0069] In this embodiment, the four line laser sensors 26 are respectively fixedly installed inside the housing 21 through the corresponding connecting brackets 23, as Figure 9 shown. When the track detection device 100 is placed on the track, the detection ends of the four line laser sensors all face the rail 1. For the convenience of distinction, from the left-to-right direction in Figure 9 the four line laser sensors are respectively denoted as the first line laser sensor 26a, the second line laser sensor 26b, the third line laser sensor 26c, and the fourth line laser sensor 26d.

[0070] The line laser projected by the line laser sensor 26 forms a fan-shaped plane. The planes of the line lasers projected by the four line laser sensors 26 are coplanar and coplanar with the cross-section of the rail 1. The line lasers projected by the four laser sensors completely cover the upper surface, inner surface and part of the outer surface of the rail 1. Therefore, multiple partial profile lines of the same cross-section of the rail 1 can be obtained through these four line laser sensors 26, and these multiple partial profile lines can be spliced to form a continuous profile line of the rail, and this profile line is used to detect the profile of the rail. In practical applications, the number and installation positions of the laser sensors 26 can be adjusted accordingly according to the type of rail to be detected (I-shaped cross-section rail or variable cross-section rail) so that the partial profile lines obtained by multiple line laser sensors 26 can be spliced to obtain a continuous profile line.

[0071] The computing device is communicatively connected to the two-dimensional cameras 25 and the line laser sensors 26 in the two track detection units 20, and is used to receive the upper surface images of the track obtained by the two-dimensional cameras 25 and the profile lines of the track obtained by the line laser sensors 26, and perform calculation and analysis on them to obtain the detection results. Only the computing device mounting rack 60 for mounting the computing device is shown in the figure, and it is detachably mounted on the cross bar at the upper end of the cart handle 50. In this embodiment, the computing device is a notebook computer, and the computing device mounting rack 60 includes a mounting plate and a hook-shaped protrusion extending from one side of the mounting plate. The notebook computer can be placed on the mounting plate and is buckled by the hook-shaped protrusion on one side.

[0072] During use, the detection personnel place the track detection device 100 on the track, adjust it to a predetermined starting position, start the corresponding detection program on the computing device, and push the track detection device 100 along the track from the starting position. During the movement, the two-dimensional camera 25 captures the upper surface images of multiple positions of the rail, and the four line laser sensors 26 detect the profile lines of multiple cross-sections of the rail. At the same time, during the movement, the distance detection unit 40 measures the moving distance of the track detection device 100, and the computing device stores the collected profile lines, upper surface images and the corresponding moving distances in a corresponding manner, and further performs calculation and analysis based on these data to detect the surface defects and their degrees of the track.

[0073] Functions and effects of the embodiment

[0074] According to the bearing wheels and the track detection device of the present invention, since the mounting frame in the track detection device is movably arranged on the track and the track detection unit is arranged on the mounting frame, it can detect the profile and upper surface defects of the passing track while moving, and the efficiency is relatively high. At least 4 bearing wheels are arranged at the bottom of the mounting frame, which can reduce the friction between the mounting frame and the rail when moving, facilitate the operator to push the mounting frame, and enable the mounting frame to move forward smoothly and smoothly.

[0075] The load-bearing wheel includes a load-bearing wheel body, a support shaft, and two bearings. One end of the support shaft is fixedly connected to the mounting frame, which can better maintain the axial position and avoid tilting and shaking due to the load during movement; the load-bearing wheel body is rotatably sleeved on the support shaft and can abut against the rail and roll along the rail when the mounting frame moves. The working mode of the fixed support shaft and the rotating load-bearing wheel body makes the structure of the load-bearing wheel more stable and the adaptability to the rail better, which helps to improve the smoothness of the track detection equipment during movement and further improve the accuracy of the detection results.

[0076] One end of the support shaft is provided with a connecting flange in the shape of a triangular plate, which is fastened to the connecting end by screwing, and the extending direction of the support shaft is parallel to the plane direction of the connecting part. The load-bearing wheel body is rotatably sleeved on the support shaft, used to abut against the rail and roll along the rail when the mounting frame moves, so that the track detection equipment moves along the track.

[0077] The load-bearing wheel body is made of insulating material, using ceramic or POM plastic material, so as to prevent the track detection equipment from making the two rails connected and energized, and prevent interference with the track circuit system. The load-bearing wheel body is installed on the support shaft through two bearings and can rotate around the support shaft. A through cavity consistent with the axis direction of the support shaft is opened inside the load-bearing wheel body. The two bearings are respectively embedded at the two side openings of the through cavity, and the support shaft is connected to the load-bearing wheel body through the two bearings, making the overall structure of the load-bearing wheel more stable, reducing the shaking during the movement of the track detection equipment, and realizing smooth forward movement. The space inside the through cavity is large, and the support shaft does not directly contact the inner wall of the through cavity, which can avoid the increase of friction when the load-bearing wheel body rotates and is also convenient for installation.

[0078] The load-bearing wheel body includes an integrally formed load-bearing wheel main body part, a load-bearing wheel chamfer part, and a load-bearing wheel limiting part. The load-bearing wheel main body part is cylindrical; the load-bearing wheel chamfer part is conical and extends outward from one end of the load-bearing wheel main body part, and its diameter gradually becomes smaller; the load-bearing wheel limiting part is located on the side close to the fixed end of the support shaft, and the cross-sectional shape of the load-bearing wheel limiting part along the axial direction is adapted to the top edge radian of the I-shaped cross-section of the rail, which can improve the stability of the load-bearing wheel body during rolling.

[0079] When the track detection equipment moves on the rail with an I-shaped cross-section, the side surface of the load-bearing wheel main body part abuts against the top surface of the rail, the load-bearing wheel chamfer part is located outside the track, and the load-bearing wheel limiting part abuts against the inner edge of the top of the rail. When the track detection equipment is placed on the track, it can move stably along the rail.

[0080] When the track detection device moves at the turnout, since the carrier wheel body of the carrier wheel has a carrier wheel chamfer part, it can cooperate with the height difference between the switch rail and the wing rail at the turnout, improve the stability of the carrier wheel when passing through the switch rail and the wing rail, further improve the smoothness of the movement of the track detection device, and make the detection result more accurate.

[0081] The above embodiments are only used to illustrate the specific implementation manners of the present invention, and the present invention is not limited to the description scope of the above embodiments.

Claims

1. An orbit detection device, characterized in that, Comprising: An installation vehicle frame, movably arranged on a track; A track detection unit, arranged on the installation vehicle frame, for detecting the profile and upper surface defects of the track; At least four load-bearing wheels, arranged at the bottom of the installation vehicle frame; And Two distance detection units, arranged at the bottom of the installation vehicle frame and respectively corresponding to two steel rails, for measuring the moving distance of the track detection device, Wherein, each of the load-bearing wheels comprises: A support shaft, one end of which is fixedly connected to the installation vehicle frame, and the other end is a free end; A load-bearing wheel body, rotatably sleeved on the support shaft, for abutting against the steel rail and rolling along the steel rail when the installation vehicle frame moves, Wherein, one side of the load-bearing wheel body close to the free end of the support shaft has a load-bearing wheel chamfer portion, The distance detection unit comprises: A mileage wheel bracket; A mileage wheel body, arranged on the mileage wheel bracket through a rotating shaft, and having an installation groove on one side thereof; A distance detection encoder, rotatably connected to the rotating shaft and located in the installation groove, the size of the installation groove being larger than the size of the distance detection encoder; and Two spring assemblies, the spring assemblies comprising a connecting column, a sleeve and a spring member, Wherein, one end of the connecting column is connected to the mileage wheel bracket, and the other end movably penetrates through the installation vehicle frame, The sleeve is tubular, the inner diameter of which is adapted to the connecting column, and is sleeved on the connecting column for guiding the connecting column, The spring member is sleeved on the connecting column, one end of which abuts against the lower surface of the installation vehicle frame, and the other end abuts against the upper surface of the mileage wheel bracket, so as to press the mileage wheel body against the steel rail.

2. The track detection device according to claim 1, wherein: Among them, The chamfer length of the load-bearing wheel chamfer portion is 45 mm, and the chamfer slope is 12 mm:45 mm.

3. The track detection device according to claim 1, wherein: Among them, One side of the load-bearing wheel body close to the fixed end of the support shaft has a load-bearing wheel limiting portion adapted to the arc of the top edge of the steel rail.

4. The track detection device according to claim 1, wherein: Among them, A through cavity is formed inside the load-bearing wheel body and is consistent with the axis direction of the support shaft.

5. The track detection device according to claim 4, characterized in that, Further comprising: Two bearings, respectively embedded at the two openings on both sides of the through cavity, The support shaft is connected to the load-bearing wheel body through the bearings.

6. The track detection device according to claim 1, wherein: Among them, The load-bearing wheel body is made of an insulating material, and the insulation resistance value of the load-bearing wheel body is not less than 1 MΩ.

7. The track detection device according to claim 6, wherein: Among them, The load-bearing wheel body is made of ceramic or POM plastic material.

8. The track detection device according to claim 1, wherein: Among them, An insulating layer is provided on the outer surface of the load-bearing wheel body.

9. The track detection device according to claim 1, wherein: Among them, The connection mode between the support shaft and the installation vehicle frame is screw connection.

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