A rail mileage measuring device and track inspection instrument

Abstract

This utility model discloses a rail mileage measuring device and a rail detector. The rail mileage measuring device includes a base, rollers, a connecting shaft, a coupling, and an encoder. The base has two fixing holes and a positioning part, with the positioning part located between the two fixing holes. The two fixing holes are screwed to the rail detector, and the positioning part abuts against the rail detector. The base also has a through hole penetrating the base, with a connecting shaft installed inside the through hole. The two opposite ends of the connecting shaft protrude out of the through hole and are respectively connected to the rollers and the coupling. The end of the coupling away from the connecting shaft is connected to the encoder. The rollers, connecting shaft, coupling, and encoder are coaxially arranged. The encoder is electrically connected to the rail detector through a wire. The rotation of the rollers directly drives the encoder through the coupling, converting mechanical motion into electrical signals in real time, eliminating the cumulative errors of traditional manual counting or indirect measurement. The rollers rotate more smoothly when in contact with the side of the rail, avoiding slippage or jamming.

Description

Technical Field

[0001] This utility model relates to the field of metrology technology, and in particular to a rail mileage measuring device and a rail inspection instrument. Background Technology

[0002] Railway track inspection equipment mainly includes specialized instruments such as track inspectors, track measuring instruments, and catenary measuring instruments. These devices are typically deployed in open-air environments, requiring continuous operation year-round and the ability to withstand harsh conditions such as wind, frost, rain, and snow. During the inspection process, all collected key data, such as track geometry parameters and catenary status, must be accurately correlated with the railway mileage calibration system.

[0003] Therefore, establishing a precise railway mileage measurement system is of significant engineering importance. By strictly matching the detection data with the corresponding mileage coordinates, deviations in track condition analysis caused by mileage misjudgment can be effectively avoided, thus preventing the formulation of incorrect track adjustment plans. A precise mileage-data correlation system not only provides a reliable basis for maintenance decisions but also accurately locates hidden defects such as millimeter-level track geometric deformation and abnormal catenary parameters, ultimately achieving efficient and precise data-driven maintenance operations. This closed-loop management mechanism for detection and maintenance based on precise mileage is of great value in ensuring railway operational safety and extending the service life of track facilities. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a rail mileage measuring device and a track detector, which aims to solve the technical problems mentioned in the background art.

[0005] A rail mileage measuring device includes a base, a roller, a connecting shaft, a coupling, and an encoder. The base has two fixing holes and a positioning part, with the positioning part located between the two fixing holes. The two fixing holes are screwed to a rail detector, and the positioning part abuts against the rail detector. The base also has a through hole penetrating the base, with the connecting shaft disposed within the through hole. The two opposite ends of the connecting shaft protrude from the through hole and are respectively connected to the roller and the coupling. The end of the coupling away from the connecting shaft is connected to the encoder. The roller, the connecting shaft, the coupling, and the encoder are coaxially arranged, and the encoder is electrically connected to the rail detector via a wire.

[0006] The beneficial effects of this utility model are:

[0007] By using a coaxial arrangement of rollers, shafts, couplings, and encoders, mechanical deviations during transmission are reduced, avoiding friction or data errors caused by misalignment and significantly improving measurement accuracy. The roller rotation directly drives the encoder through the coupling, converting mechanical motion into electrical signals in real time. This eliminates the cumulative errors of traditional manual counting or indirect measurement, ensuring high reliability of mileage data. The rollers rotate more smoothly when in contact with the side of the rail, preventing slippage or jamming and ensuring long-term stable operation. A double fixing method, using two fixed holes for screw connection and abutment with the positioning part, ensures a tight fit between the device and the track detector, preventing displacement caused by vibration or impact and enhancing overall rigidity. No complex adjustments are required during installation, shortening equipment deployment time. The coupling is built into the through hole of the base, preventing external dust or foreign objects from entering the transmission components, extending service life, and reducing environmental interference (such as temperature and humidity changes, rail vibration) on the measurement. Through optimized mechanical structure and electrical integration, this device achieves high precision, high stability, and strong environmental adaptability in rail mileage measurement, while also considering ease of installation and economical maintenance, providing efficient and reliable technical support for railway inspection.

[0008] Furthermore, the base is also provided with a first bracket, and the first bracket has a first receiving space for accommodating the coupling.

[0009] Furthermore, the first support is provided with an observation hole, which is connected to the first accommodating space.

[0010] Furthermore, the encoder is provided with a positioning hole, and the first bracket is provided with a threaded hole, the positioning hole and the threaded hole being positioned corresponding to each other.

[0011] Furthermore, a first coupling sleeve, a second coupling sleeve, and two bearings are fitted onto the coupling shaft. The first coupling sleeve is disposed between the two bearings, and the second coupling sleeve is disposed between the end of one bearing facing away from the other bearing and the roller. Both the first coupling sleeve and the second coupling sleeve are interference-fitted with the coupling shaft. The inner rings of the two bearings are clearance-fitted with the through hole, and the outer ring end faces of the two bearings protrude outside the through hole.

[0012] Furthermore, an annular baffle is fitted on the connecting shaft, the annular baffle abuts against the end face of the roller and is interference-fitted with the connecting shaft, the connecting shaft is provided with an axial threaded hole, a bolt is provided in the axial threaded hole, and the end face of the bolt abuts against the end face of the annular baffle to limit the axial displacement of the roller.

[0013] Furthermore, the base is provided with a second bracket, and the second bracket is provided with a second receiving space, which encloses the first bracket and the encoder.

[0014] Furthermore, the cross-section of the roller gradually decreases from the center to the edge, and the roller is a ceramic wheel.

[0015] This utility model also provides a track detector, including the rail mileage measuring device as described above. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the rail mileage measuring device of this utility model;

[0017] Figure 2 This is a schematic diagram of the encoder structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the first support of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the coupling, bearing, coupling sleeve, roller and annular baffle of this utility model.

[0020] In the figure: 1. Base; 11. Fixing hole; 12. Positioning part; 2. Roller; 3. Shaft; 4. Coupling; 5. Encoder; 51. Positioning hole; 6. First bracket; 61. First receiving space; 62. Observation hole; 63. Threaded hole; 64. Round hole; 7. Bearing; 71. Inner ring; 72. Outer ring; 81. First coupling sleeve; 82. Second coupling sleeve; 9. Annular baffle; 10. Bolt; 20. Second bracket; 201. Second receiving space. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0022] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Furthermore, the various embodiments of the invention, the features within those embodiments, and the features of the embodiments may be freely combined without obvious conflict or contradiction.

[0024] A rail mileage measuring device, such as Figures 1 to 4 As shown, it includes a base 1, rollers 2, connecting shafts 3, couplings 4, and encoders 5, with rollers 2, connecting shafts 3, couplings 4, and encoders 5 arranged coaxially.

[0025] Specifically, the base 1 is provided with two fixing holes 11 and a positioning part 12. The positioning part 12 is located between the two fixing holes 11. The two fixing holes 11 are screwed to the track detector. The positioning part 12 protrudes from the surface of the base 1 and abuts against the track detector. The double fixing method of screwing the two fixing holes 11 and abutting the positioning part 12 ensures that the device and the track detector fit tightly together, preventing displacement caused by vibration or impact and enhancing the overall rigidity. The base 1 is also provided with a through hole (not shown) penetrating the base 1. A connecting shaft 3 is installed in the through hole. The connecting shaft 3 is positioned opposite to the track detector. Both ends protrude out of the through hole and are connected to the roller 2 and the coupling 4 respectively. The end of the coupling 4 away from the connecting shaft 3 is connected to the encoder 5. The connecting shaft 3 is fitted with a first connecting sleeve 81, a second connecting sleeve 82 and two bearings 7. The first connecting sleeve 81 is set between the two bearings 7. The second connecting sleeve 82 is set between the end of one bearing 7 facing away from the other bearing 7 and the roller 2. Both the first connecting sleeve 81 and the second connecting sleeve 82 are interference fit with the connecting shaft 3. The inner rings of the two bearings 7 are clearance fit with the through hole, and the outer ring end faces of the two bearings 7 protrude out of the through hole.

[0026] It should be noted that the bearing 7 structure includes an inner ring 71 and an outer ring 72 fitted outside it, with balls (not shown) between the inner ring 71 and the outer ring 72. The inner ring 71 is coaxially connected to the connecting shaft 3, and the two inner rings are mated through the connecting sleeve 8. When the roller 2 rotates, it drives the connecting shaft 3, causing the inner ring 71 to rotate accordingly, while the outer ring 72 remains stationary, isolating the inner ring 71 from the through hole. The bearing 7 is built into the through hole of the base 1 to prevent external dust or foreign objects from entering the transmission components, extending its service life, and reducing the interference of the environment (such as temperature and humidity changes, rail vibration) on the measurement.

[0027] Specifically, an annular baffle 9 is also fitted on the connecting shaft 3. The annular baffle 9 abuts against the end face of the roller 2 and is interference-fitted with the connecting shaft 3. The connecting shaft 3 is provided with an axial threaded hole (not shown). A bolt 10 is provided in the axial threaded hole. The bolt 10 is screwed to the connecting shaft 3. The end face of the bolt 10 abuts against the end face of the annular baffle 9 to limit the axial displacement of the roller 2, thereby forming a rotatable rigid component structure.

[0028] Specifically, the base 1 is also provided with a first bracket 6, and the first bracket 6 has a first receiving space 61 for accommodating the coupling 4. The first bracket 6 is provided with an observation hole 62, which communicates with the first receiving space 61. The first bracket 6 provides a sturdy and stable installation platform and physical protective shell for the coupling, effectively preventing external foreign objects from causing contamination, wear or physical damage to the coupling 4, and extending the service life of the coupling 4. At the same time, the bracket structure enhances the rigidity and stability of the coupling 4 installation and reduces vibration transmission. The observation hole 62 provides a channel to directly observe the inside of the first receiving space 61. Maintenance personnel can quickly and intuitively check the condition of the coupling 4 through the observation hole 62 without disassembling the first bracket 6, thus improving installation and maintenance efficiency.

[0029] Understandably, the first bracket 6 is also provided with a round hole 64, and the end of the coupling 4 away from the coupling shaft 3 passes through the round hole 64 and connects to the encoder 5.

[0030] Specifically, the encoder 5 is provided with a positioning hole 51, and the first bracket 6 is provided with a threaded hole 63. The positioning hole 51 and the threaded hole 63 are positioned in correspondence. The encoder 5 is electrically connected to the track detector through a wire. The encoder 5 is fixed on the first bracket 6 through the positioning hole 51 and the threaded hole 63. When the coupling 4 rotates, it drives the input shaft of the encoder 5 to rotate. After the encoder 5 converts the mechanical motion into an electrical signal, it transmits it to the track detector through a wire.

[0031] Specifically, the base 1 is provided with a second bracket 20, and the second bracket 20 is provided with a second receiving space 201. The second receiving space 201 encloses the first bracket 6 and the encoder 5. The second bracket 20 provides a sturdy and stable installation platform and physical protective shell for the first bracket 6 and the encoder 5, effectively preventing external foreign objects from causing contamination, wear or physical damage to the encoder 5, and extending the service life of the coupling 4. At the same time, the bracket structure enhances the rigidity and stability of the encoder 5 installation and reduces vibration transmission.

[0032] Specifically, the cross-section of roller 2 gradually decreases from the center towards the edge. Roller 2 is a ceramic wheel. This structural design achieves a dual function by optimizing the wheel-rail contact area: on the one hand, it effectively breaks up the water film and compacts snow on the rail surface; on the other hand, through precise contact pressure distribution, it ensures that the wheel-rail contact interface is in a stable and close fit. This progressive contour design significantly reduces the decrease in adhesion coefficient caused by interfacial medium interference, thereby effectively suppressing the occurrence of relative slippage.

[0033] This invention, by coaxially arranging the roller 2, connecting shaft 3, coupling 4, and encoder 5, reduces mechanical deviations during transmission, avoids friction or data errors caused by misalignment, and significantly improves measurement accuracy. The movement of the track detector drives the base 1, transmitting power to the bearing 7 housed in the through hole. This causes the roller 2, in contact with the side of the track, to drive the connecting shaft 3, which in turn drives the coupling 4 and then the encoder 5. This process converts mechanical motion into electrical signals in real time, eliminating the accumulated errors of traditional manual counting or indirect measurement, ensuring high reliability of mileage data. The roller 2 rotates more smoothly when in contact with the side of the rail, and the gradually decreasing cross-section of the roller 2 from the center to the edge prevents slippage or jamming. To ensure long-term stable operation, the device employs a double-fixing method, where two fixing holes 11 are screwed together and the positioning part 12 abuts against each other. This ensures a tight fit between the device and the track detector, preventing displacement caused by vibration or impact, enhancing overall rigidity, and eliminating the need for complex adjustments during installation, thus shortening equipment deployment time. The bearing 7 is built into the through hole of the base 1, preventing external dust or foreign objects from entering the transmission components, extending service life, and reducing environmental interference (such as temperature and humidity changes, rail vibration) on the measurement. Through optimized mechanical structure and electrical integration, this device achieves high precision, high stability, and strong environmental adaptability in rail mileage measurement, while also considering ease of installation and economical maintenance, providing efficient and reliable technical support for railway inspection.

[0034] This utility model also provides a track detector, including the rail mileage measuring device as described above.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The embodiments described above are merely illustrative of the implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rail mileage measuring device, characterized in that: The device includes a base, rollers, a connecting shaft, a coupling, and an encoder. The base has two fixing holes and a positioning part, with the positioning part located between the two fixing holes. The two fixing holes are screwed to a track detector, and the positioning part abuts against the track detector. The base also has a through hole, through which the connecting shaft is installed. The two opposite ends of the connecting shaft protrude from the through hole and are respectively connected to the rollers and the coupling. The end of the coupling away from the connecting shaft is connected to the encoder. The rollers, the connecting shaft, the coupling, and the encoder are coaxially arranged. The encoder is electrically connected to the track detector via a wire.

2. The rail mileage measuring device according to claim 1, characterized in that: The base is also provided with a first bracket, and the first bracket has a first receiving space for accommodating the coupling.

3. The rail mileage measuring device according to claim 2, characterized in that: The first bracket is provided with an observation hole, which is connected to the first accommodating space.

4. The rail mileage measuring device according to claim 2, characterized in that: The encoder is provided with a positioning hole, and the first bracket is provided with a threaded hole, with the positioning hole and the threaded hole corresponding in position.

5. The rail mileage measuring device according to claim 1, characterized in that: The connecting shaft is fitted with a first connecting shaft sleeve, a second connecting shaft sleeve, and two bearings. The first connecting shaft sleeve is disposed between the two bearings. The second connecting shaft sleeve is disposed between the end of one bearing facing away from the other bearing and the roller. Both the first connecting shaft sleeve and the second connecting shaft sleeve are interference-fitted with the connecting shaft. The inner rings of the two bearings are clearance-fitted with the through hole, and the outer ring end faces of the two bearings protrude outside the through hole.

6. The rail mileage measuring device according to claim 5, characterized in that: An annular baffle is fitted on the connecting shaft. The annular baffle abuts against the end face of the roller and is interference-fitted with the connecting shaft. The connecting shaft has an axial threaded hole, and a bolt is installed in the axial threaded hole. The end face of the bolt abuts against the end face of the annular baffle to limit the axial displacement of the roller.

7. The rail mileage measuring device according to claim 2, characterized in that: The base is provided with a second bracket, and the second bracket is provided with a second accommodating space, which encloses the first bracket and the encoder.

8. The rail mileage measuring device according to claim 1, characterized in that: The cross-section of the roller gradually decreases from the center towards the edge.

9. A track detector, characterized in that: Includes the rail mileage measuring device as described in any one of claims 1 to 8.

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