Subway laser chord measuring device with scale mark
The subway laser string line measuring device with scale markings solves the problems of insufficient measurement accuracy and laser beam irradiation deviation of traditional tools, realizing high-precision and convenient track parameter measurement and reducing safety hazards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA COMMUNICATIONS COMMUNICATIONS (TIANJIN) RAIL TRANSIT OPERATION MANAGEMENT CO LTD
- Filing Date
- 2025-10-09
- Publication Date
- 2026-08-04
AI Technical Summary
Existing subway track measuring tools lack scale markings, resulting in insufficient measurement accuracy. They are also greatly affected by ambient light and cannot meet the requirements for high precision, high efficiency, and convenience. In addition, the fixed-height laser beam cannot be perpendicular and centered to illuminate key parts of the track, leading to deviations in track gauge measurement.
A subway laser string line measuring device with scale markings was designed, which includes a laser emitting device, a target, and a height adjustment mechanism. By rotating the handle to adjust the bevel gear and threaded column, the height and angle of the laser column can be dynamically adjusted to ensure that the laser reference line is in contact with the track measurement reference surface.
It achieves precise capture of laser reference lines, reduces errors from manual readings, ensures the accuracy of measurement data, reduces potential safety hazards in train operation, and improves the precision and efficiency of track maintenance.
Smart Images
Figure CN224593960U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rail transit engineering technology, and in particular to a subway laser string line measuring device with scale markings. Background Technology
[0002] In the construction, operation, and maintenance of subway track systems, accurate measurement of track geometry parameters is crucial for ensuring smooth train operation and preventing track wear and safety accidents. Traditional subway track measurement relies heavily on tools such as ordinary chords and levels, which lack scale markings. A measuring tape is needed to measure the distance between the chord and the track, which is prone to human error leading to insufficient measurement accuracy. Furthermore, traditional tools are greatly affected by ambient light, and readings in dim conditions are prone to deviation. These methods fail to meet the demands of "high precision, high efficiency, and convenience" in track measurement and are no longer suitable for modern subway operation and maintenance needs. Therefore, the subway laser chord measuring device with scale markings has emerged to address this need.
[0003] The device uses a laser emission module to form a precise laser reference line, replacing the traditional manually drawn string line. This avoids reference deviations caused by string line slack or offset. At the same time, the scale markings on the string line body or its supporting components can directly read the measurement data without the need for additional tools, reducing manual reading errors. This ensures that the measurement results of parameters such as track gauge and elevation difference are more consistent with the actual track condition, providing accurate data support for track adjustment.
[0004] In existing technologies, some devices suffer from varying track bed heights and sleeper specifications during the laying of new tracks, resulting in inconsistent heights of the track top surface relative to the laser emitting device. A laser beam at a fixed height cannot be perpendicularly and centered to illuminate key parts of the track, causing deviations in track gauge measurements due to laser tilt. Furthermore, the measurement of elevation differences is difficult to reflect the actual track undulations due to inconsistent benchmarks, affecting the quality control of initial track installation. To address these issues, a subway laser chord measuring device with graduated markings is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a subway laser string line measuring device with scale markings, which aims to improve the problem in the prior art where a laser beam at a fixed height cannot be vertically and centrally irradiated on key parts of the track, resulting in deviations in track gauge measurement due to laser tilt.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A subway laser string line measuring device with scale markings includes a rail, a laser emitting device slidably connected to the top of the rail, a target slidably connected to the top of the rail, a moving target slidably connected to the top of the rail, a height adjustment mechanism installed inside the laser emitting device, the target including a lifting device, a permanent magnet fixedly connected to the bottom of the lifting device, and a grid scale plate provided on the top of the lifting device; The height adjustment mechanism includes a rotating handle, and a drive assembly is fixedly connected to the outside of the rotating handle; Furthermore, the laser emitting device includes a mounting plate, an electromagnet is fixedly connected to the bottom of the mounting plate, an electromagnetic switch is fixedly connected to the outside of the electromagnet, two clamps are fixedly connected to the outside of the mounting plate, a rotating slide is rotatably connected to the top of the mounting plate, an angle slide is slidably connected inside the rotating slide, and a laser column is detachably connected to the top of the angle slide. Furthermore, the drive assembly includes a threaded column, a bevel gear one fixedly connected to the top of the threaded column, a bevel gear two rotatably connected inside the angle slide, a connecting column fixedly connected inside the bevel gear two, a connecting block threadedly connected to the outside of the threaded column, a support column threadedly connected to the outside of the threaded column, and two fixed columns fixedly connected to the outside of the support column. Furthermore, the external rotatable connection of the first bevel gear is to the inside of the angle slide, and the external rotatable connection of the second bevel gear is to the inside of the angle slide; Furthermore, the outside of the rotating handle is rotatably connected to the outside of the angle slide, and the outside of both fixed posts are fixedly connected to the inside of the angle slide. Furthermore, the outer surfaces of the first bevel gear and the second bevel gear are meshed with each other, and the outer surface of the rotating handle is fixedly connected to the outside of the connecting column.
[0007] This utility model has the following beneficial effects: 1. In this utility model, when adjusting the height of the laser column, the handle is rotated, which drives the drive assembly. The handle drives the second bevel gear to rotate through the connecting column, and the second bevel gear drives the meshing first bevel gear to rotate, which in turn moves the threaded column in the angle slide. The threaded column drives the angle slide to move, and the laser column at the top of the angle slide moves synchronously to complete the height adjustment. This process can dynamically adjust the laser height for track settlement and local deformation, so that the laser reference line is in contact with the track measurement reference surface, accurately capture problems such as track deviation and excessive height difference, ensure accurate and reliable measurement data, provide data support for track maintenance operations, reduce inadequate maintenance, and reduce potential safety hazards in train operation. Attached Figure Description
[0008] Figure 1This is a three-dimensional schematic diagram of a subway laser string line measuring device with graduated markings proposed in this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the target structure of a subway laser string line measuring device with graduated markings proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point B in the middle.
[0009] Legend: 1. Railway tracks; 2. Laser emitting device; 21. Mounting plate; 22. Electromagnet; 23. Electromagnetic switch; 24. Clamp; 25. Rotary slide table; 26. Angle slide table; 27. Laser column; 3. Target; 31. Lifting device; 32. Permanent magnet; 33. Grid scale plate; 4. Moving target; 5. Height adjustment mechanism; 51. Rotating handle; 52. Drive assembly; 521. Threaded post; 522. Bevel gear one; 523. Bevel gear two; 524. Connecting post; 53. Connecting block; 54. Support column; 55. Fixing column. Detailed Implementation
[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0011] Example: A subway laser string line measuring device with graduated markings, referenced Figure 3 and Figure 4The system includes a rail 1, which provides a base for the installation and sliding of a laser emitting device 2, a target 3, and a moving target 4. The top of the rail 1 is slidably connected to the laser emitting device 2, which emits a laser reference line for measuring track parameters. The top of the rail 1 is also slidably connected to the target 3, which receives the laser and reads the data through a grid scale plate 33. The top of the rail 1 is also slidably connected to the moving target 4, which assists the target 3 in completing multi-point measurements. The laser emitting device 2 has a height adjustment mechanism 5 installed inside, which adjusts the height of the laser column 27 to ensure that the laser is in contact with the track reference surface. The target 3 includes a lifting device 31, which facilitates the movement of the target 3. A permanent magnet 32 is fixedly connected to the bottom of the lifting device 31, which keeps the target 3 stable by adhering to the rail 1. The top of the lifting device 31 is equipped with a grid scale plate 33, which is used to accurately read the laser irradiation position data.
[0012] The height adjustment mechanism 5 includes a rotating handle 51, which provides a manual operation point for height adjustment. A drive assembly 52 is fixedly connected to the outside of the rotating handle 51. The rotating handle 51 drives the drive assembly 52 to transmit adjustment power. The drive assembly 52 includes a threaded column 521. When the threaded column 521 rotates, it drives the connecting block 53 and the support column 54 to move. A bevel gear 522 is fixedly connected to the top of the threaded column 521. The rotation of the bevel gear 522 drives the threaded column 521 to rotate synchronously. A bevel gear 523 is rotatably connected inside the angle slide table 26. The rotation of the bevel gear 523 drives the bevel gear 522 to rotate. A connecting column 524 is fixedly connected inside the bevel gear 523. The connecting column 524 transmits the power of the rotating handle 51 to the bevel gear 523.
[0013] The threaded column 521 is externally threaded to a connecting block 53. Rotation of the threaded column 521 causes the connecting block 53 to move along the threaded column 521. The threaded column 521 is externally threaded to a support column 54. Rotation of the threaded column 521 causes the support column 54 to move, thereby supporting the angle slide 26. The support column 54 is externally fixedly connected to two fixing columns 55. The fixing columns 55 fix the support column 54 and the angle slide 26 to ensure synchronous movement. The external rotatable connection of bevel gear 1 522 is internally connected to the angle slide 26, so that bevel gear 1 522 rotates stably within the angle slide 26. The external rotatable connection of bevel gear 2 523 is internally connected to the angle slide 26, so that bevel gear 2 523 operates stably within the angle slide 26.
[0014] The external rotating handle 51 is rotatably connected to the outside of the angle slide 26, allowing the rotating handle 51 to be operated flexibly outside the angle slide 26. The external parts of the two fixed columns 55 are fixedly connected to the inside of the angle slide 26, strengthening the connection stability between the support column 54 and the angle slide 26. The external parts of bevel gear 1 522 and bevel gear 2 523 are meshed with each other, realizing the transmission of power from bevel gear 2 523 to bevel gear 1 522. The external rotating handle 51 is fixedly connected to the outside of the connecting column 524, so that the rotating handle 51 drives the connecting column 524 to rotate synchronously. In this way, the laser height can be dynamically adjusted to address the height changes at various points caused by track settlement and local deformation.
[0015] Specifically, when adjusting the height of the laser column 27, rotating the handle 51 causes the connecting column 524 to rotate, which in turn causes the second bevel gear 523 to rotate. The second bevel gear 523 drives the meshing first bevel gear 522 to rotate, which in turn drives the threaded column 521 to rotate. The threaded column 521 causes the support column 54 to move through the fixed column 55, which in turn moves the angle slide 26. The angle slide 26 then moves the laser column 27 synchronously to complete the height adjustment and ensure that the laser reference line fits the track.
[0016] Reference Figure 1 and Figure 2 The laser emitting device 2 includes a mounting plate 21, which provides a mounting base for the electromagnet 22, clamps 24, and rotary slide 25. The electromagnet 22 is fixedly connected to the bottom of the mounting plate 21. When energized, the electromagnet 22 adheres to the rail 1, securing the laser emitting device 2. An electromagnetic switch 23 is fixedly connected to the outside of the electromagnet 22, controlling the on / off state of the electromagnet to switch between fixed and movable states. Two clamps 24 are fixedly connected to the outside of the mounting plate 21, assisting in fixing the mounting plate 21 and enhancing the stability of the device. Qualitatively, a rotating slide 25 is rotatably connected to the top of the mounting plate 21. The rotating slide 25 can rotate to adjust the horizontal angle of the laser column 27 to adapt to different measurement directions. An angle slide 26 is slidably connected inside the rotating slide 25. The angle slide 26 can slide in conjunction with the height adjustment mechanism 5 to adjust the height of the laser column 27. The laser column 27 is detachably connected to the top of the angle slide 26. The laser column 27 emits a laser reference line and is easy to disassemble and maintain. Therefore, the laser height can be dynamically adjusted to address the height changes at various points caused by track settlement and local deformation.
[0017] Specifically, when using the laser emitting device 2, the electromagnetic switch 23 controls the electromagnet 22 to attract the rail 1 fixing device, the rotating slide 25 is rotated to adjust the horizontal angle of the laser column 27, and the height adjustment mechanism 5 is used to make the angle slide 26 drive the laser column 27 to adjust the height. The laser column 27 emits laser to the grid scale plate 33 of the target 3 to complete the measurement of track parameters and ensure data accuracy.
[0018] The implementation principle of this application embodiment is as follows: When adjusting the height of the laser column 27, the rotating handle 51 is rotated first. The rotation of the rotating handle 51 drives the entire drive assembly 52 to function. At this time, when the rotating handle 51 rotates, it drives the second bevel gear 523 to rotate through the connection of the connecting column 524. The rotation of the second bevel gear 523 causes the first bevel gear 522, which meshes with it, to rotate. At the same time, the threaded column 521 fixed inside the angle slide 26 moves. The movement of the threaded column 521 drives the angle slide 26 to move. The top of the angle slide 26 is connected to the laser column 27 and moves synchronously. This completes the height adjustment of the laser column 27. In order to address the height changes of various points caused by track settlement and local deformation, the laser height can be dynamically adjusted so that the laser reference line always fits the track measurement reference surface, accurately capturing problems such as track deviation and excessive height difference. This provides data support for track lifting, track removal or rerouting operations, while ensuring accurate and reliable measurement data, reducing inadequate maintenance due to inaccurate measurements, and reducing potential safety hazards in train operation.
[0019] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A subway laser string line measuring device with graduated markings, comprising a rail (1), characterized in that: A laser emitting device (2) is slidably connected to the top of the rail (1), a target (3) is slidably connected to the top of the rail (1), a moving target (4) is slidably connected to the top of the rail (1), a height adjustment mechanism (5) is installed inside the laser emitting device (2), the target (3) includes a lifting device (31), a permanent magnet (32) is fixedly connected to the bottom of the lifting device (31), and a grid scale plate (33) is provided on the top of the lifting device (31). The height adjustment mechanism (5) includes a rotating handle (51), and a drive assembly (52) is fixedly connected to the outside of the rotating handle (51).
2. The subway laser string line measuring device with scale markings according to claim 1, characterized in that: The laser emitting device (2) includes a mounting plate (21), an electromagnet (22) is fixedly connected to the bottom of the mounting plate (21), an electromagnetic switch (23) is fixedly connected to the outside of the electromagnet (22), two clamps (24) are fixedly connected to the outside of the mounting plate (21), a rotating slide (25) is rotatably connected to the top of the mounting plate (21), an angle slide (26) is slidably connected inside the rotating slide (25), and a laser column (27) is detachably connected to the top of the angle slide (26).
3. A subway laser string line measuring device with scale markings according to claim 2, characterized in that: The drive assembly (52) includes a threaded column (521), a bevel gear (522) fixedly connected to the top of the threaded column (521), a bevel gear (523) rotatably connected inside the angle slide (26), a connecting column (524) fixedly connected inside the bevel gear (523), a connecting block (53) threadedly connected to the outside of the threaded column (521), a support column (54) threadedly connected to the outside of the threaded column (521), and two fixed columns (55) fixedly connected to the outside of the support column (54).
4. A subway laser string line measuring device with scale markings according to claim 3, characterized in that: The external rotatable connection of the first bevel gear (522) is to the inside of the angle slide (26), and the external rotatable connection of the second bevel gear (523) is to the inside of the angle slide (26).
5. A subway laser string line measuring device with graduated markings according to claim 3, characterized in that: The external rotating handle (51) is rotatably connected to the outside of the angle slide (26), and the external parts of the two fixed columns (55) are fixedly connected to the inside of the angle slide (26).
6. A subway laser string line measuring device with scale markings according to claim 3, characterized in that: The outer side of the first bevel gear (522) is meshed with the outer side of the second bevel gear (523), and the outer side of the rotating handle (51) is fixedly connected to the outer side of the connecting column (524).