A device for measuring auxiliary track gauge based on a railway track inspection instrument

Abstract

The utility model discloses a kind of auxiliary track gauge measuring devices based on railway track detector, including measuring wheel sliding frame, displacement sensor and tension spring.Measuring wheel sliding frame is made of frame body and frame column, and measuring wheel is assembled at the top end of frame column;Frame body end surface is provided with bearing hole and installation slot, bearing hole is built-in trimming bearing, trimming bearing is equipped with linear guide shaft inside, and linear guide shaft both ends are equipped with sliding frame fixed seat to realize the stable limiting of measuring wheel sliding frame.Magnetic ring is arranged in installation slot, and the magnetic ring is sleeved on the sensing shaft of the front end of displacement sensor;Tension spring is connected with measuring wheel sliding frame and track detector main body respectively through screw with hole I and screw with hole II.The utility model drives measuring wheel to produce synchronous displacement with curve track form change in real time by the resilience of tension spring, effectively solve the problem of track gauge measurement deviation caused by that traditional technology "three point measurement" cannot be fully adapted to the continuous action surface of arc steel rail, significantly improve the accuracy and reliability of curve track gauge measurement data.

Description

Technical Field

[0001] This utility model belongs to the field of railway track inspection, specifically relating to an auxiliary track gauge measuring device based on a railway track inspection instrument. Background Technology

[0002] As a core geometric parameter of railway tracks, the accuracy of railway gauge measurement directly determines the safety and stability of train operation and the service life of track structures, making it a key aspect of railway line maintenance and engineering construction.

[0003] Currently, railway track gauge measurement often employs a combination of "two fixed points + one floating point," using the principle of "three-point measurement" to eliminate the influence of local track deviations and accurately obtain the actual working track gauge. This method achieves good measurement accuracy in straight sections, but the following problems arise in curved sections:

[0004] (1) Difficulty in adapting to superelevation and curvature causes measurement point deviation. On the one hand, curved tracks will set the outer rail superelevation to balance the centrifugal force of the train, that is, the outer rail is higher than the inner rail. The benchmark for three-point measurement is based on the assumption that the track is in a horizontal state. Superelevation will prevent the three measuring points from being in contact with the specified working surface of the rail (16 mm below the top surface of the rail) at the same time. The outer measuring point is prone to being too high and the inner measuring point is prone to being too low, which will destroy the stability of the measurement benchmark. On the other hand, curved tracks are continuous arcs. The three measuring points of the three-point measurement are rigid structures with a fixed spacing. It is difficult to completely fit the continuous working surface of the curved rail. Local measuring points may be suspended or squeezed, resulting in the measured track gauge not being the actual distance of the rail working surface.

[0005] (2) The error of manual operation is amplified. When measuring curved tracks, the manual operation of the three-point measuring tool requires frequent alignment with the working surface of the rail, and the measuring angle needs to be adjusted according to the curve direction to ensure that the measuring points are in close contact as much as possible. Compared with the simple alignment operation of straight tracks, the angle adjustment in curve measurement relies entirely on manual experience, and different operators have different angle judgments. At the same time, the measuring points of curved tracks are more densely packed. With multiple operations, the deviation of the three-point contact will continue to accumulate, resulting in a large dispersion of data measured by different people in the same curve section, reducing the consistency and reliability of the measurement results.

[0006] (3) Not applicable to complex curve combination sections. For complex curve tracks with combinations of multiple circular curves and transition curves, the radius of curvature, widening amount, and superelevation value of different sections are all dynamically changing. Three-point measurement is mostly a single-point static measurement, which is difficult to adapt to these dynamically changing parameters synchronously. For example, in transition curve sections, the gauge widening amount gradually transitions from a straight line value to a circular curve value. The fixed measurement point spacing of three-point measurement cannot capture this gradual process, and can only obtain discrete measurement values, which cannot reflect the continuity of the gauge gradual change and cannot meet the requirements of complex curve tracks for refined measurement data.

[0007] Chinese utility model CN223458621U discloses a measuring device for railway track laying. This utility model relates to the field of measuring instrument technology and includes a fixed plate, connecting rods, a track, and an upper traveling wheel. Connecting rods are installed on both sides of the fixed plate, and the other end of the connecting rods is rotatably connected to the upper traveling wheel set on the track. A bearing is installed on the fixed plate, and a movable plate is installed outside the bearing. A spring is provided between the movable plate and the fixed plate. This utility model adopts a wheel design, allowing the measuring personnel to push the measuring device on the track by simply pushing a handle. During the movement, an ultrasonic ranging sensor is used to measure the track spacing in real time, and the measurement information is displayed on a display installed on the handle, thus replacing the traditional measuring ruler. It eliminates the need for the measuring personnel to squat down for measurement, saving more effort. This utility model can achieve continuous measurement, with a wider measurement range and better measurement effect than traditional intermittent measurement. However, this measuring device has the following problems: ① High equipment replacement cost. Traditional track inspection instruments have been widely used in the national railway engineering system. If replaced with this measuring device, not only will the research and development and production costs of the measuring device be borne, but also a large number of existing track inspection instruments in use will have to be replaced. Even if the cost of a single measuring device is the same as that of traditional equipment, the overall replacement cost over a large area will be astronomical. For remote branch lines, freight lines, and other lines with limited operating revenue, such investment will seriously increase the financial pressure on railway operators. ② This measuring device uses ultrasonic ranging sensors to measure track spacing in real time. However, ultrasonic waves have weak environmental adaptability and are sensitive to temperature changes such as high temperature, low temperature, or large temperature differences between day and night, which can lead to deviations in detection accuracy and require frequent calibration. Ultrasonic waves are easily affected by external conditions and have poor anti-interference ability. They can be interfered with by the vibration of trains on site and the sound wave signals of surrounding electromagnetic equipment (such as walkie-talkies and detectors) on busy main lines. Summary of the Invention

[0008] This utility model discloses an auxiliary track gauge measuring device based on a railway track inspection instrument. Its design purpose is to solve the problem of large measurement errors in existing track inspection instruments when facing curved tracks. It aims to provide a track gauge measuring device that is simple in structure, easy to operate, easy to replace, and low in cost.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An auxiliary track gauge measuring device based on a railway track inspection instrument, characterized in that it comprises:

[0011] A measuring wheel sliding frame is provided, with a measuring wheel mounted on its top. The measuring wheel is used to contact the working surface of the track (16 mm below the top surface of the track). The measuring wheel sliding frame and the displacement sensor are installed in a sleeve manner.

[0012] The sliding frame fixing base has two sets, which are symmetrically arranged on both sides of the measuring wheel sliding frame, and the measuring wheel sliding frame can slide freely on the sliding frame fixing base;

[0013] A displacement sensor, one end of which is provided with a sensing shaft, which passes through the sensor mounting base and is connected to the sliding frame of the measuring wheel.

[0014] A tension spring is provided at one end, with a screw I having a hole, which is threadedly connected to the sliding frame of the measuring wheel. The other end of the tension spring is provided with a screw II having a hole, which is threadedly connected to the track inspection instrument.

[0015] Furthermore, the measuring wheel sliding frame includes a frame body, a column, and a measuring wheel. The frame body has a mounting groove in the middle, and a mounting hole at the bottom of the mounting groove for the sensor shaft to pass through. Bearing holes are symmetrically provided on both sides of the mounting groove. The column is vertically arranged on the top surface of the frame body and is made integrally with the frame body using a molding process. The measuring wheel is assembled at the top of the column.

[0016] Furthermore, a magnetic ring is installed inside the mounting groove, and a through hole is opened in the center of the magnetic ring for passing through the sensing shaft. The magnetic ring is connected and fixed to the measuring wheel sliding frame by screws and placed in the mounting groove.

[0017] Furthermore, a slit bearing is installed in the bearing hole. One end of the slit bearing is flange-shaped, and a screw hole is provided on the flange end face. The slit bearing is slidably connected and fixed to the measuring wheel by screws. The other end of the slit bearing passes through the bearing hole, and a buffer washer is provided on the end face to prevent the slit bearing from directly colliding with the sliding frame fixing seat.

[0018] Furthermore, the sliding bracket fixing seat includes a linear guide shaft, and an opening slot is provided on the top of the sliding bracket fixing seat. The two ends of the linear guide shaft are placed inside the opening slot and are fixedly connected by screws. The linear guide shaft passes through the slit bearing. After assembly, the slit bearing can slide freely along the axial direction of the linear guide shaft.

[0019] Furthermore, the displacement sensor includes a sensor mounting base and a sensing shaft. A through hole is provided on the end face of the sensor mounting base for the sensing shaft to pass through. The sensing shaft is slidably connected to the magnetic ring to sense and transmit the sliding distance of the magnetic ring in real time. A connecting shaft is fixedly connected to one end of the sensing shaft. The sensing shaft is connected to the displacement sensor as a whole through the connecting shaft. The outer surface of the connecting shaft is provided with an external thread. The connecting shaft is embedded in the through hole of the sensor mounting base, and a nut is provided at the protruding end to be fixedly connected to the sensor mounting base.

[0020] Furthermore, the tension spring includes a screw with holes I and a screw with holes II. The threaded ends of the screw with holes and the screw with holes II are provided with small holes. The two ends of the tension spring are in the shape of semi-circular grooves. The semi-circular grooves pass through the small holes and are assembled and installed with the screw with holes I and the screw with holes II.

[0021] Furthermore, the screw with holes I is connected and fixed to the measuring wheel sliding frame, and the screw with holes II is installed on and fixed to the end face of the track inspector. The screw with holes I and the screw with holes II keep the tension spring in a stable and free state. When the tension spring is subjected to tension and deforms, it can drive the measuring wheel sliding frame to slide along the axial direction on the sensing shaft.

[0022] The working principle of this utility model is as follows: First, the operator places the device inside the groove on the side of the track inspection instrument body near the driven wheel. According to the standard requirements for rail gauge detection (i.e., the device needs to be 16mm below the top surface of the rail), the vertical height of the device is precisely adjusted. At the same time, a shim of appropriate specification is selected and placed at the bottom of the device according to the actual gap inside the groove to ensure that the bottom of the device fits seamlessly with the bottom surface of the groove to avoid displacement deviation after installation. Then, using the threaded holes on the device sliding frame fixing seat and the sensor mounting seat as a reference, holes are drilled at the corresponding positions in the groove of the track inspection instrument to ensure that the axis of the hole is completely coincident with the axis of the threaded hole. Finally, bolts are used to pass through the threaded hole of the fixing seat and the machined hole in the groove to firmly fix the device inside the groove of the track inspection instrument. Then, tighten the screw with holes I into the preset mounting position of the measuring wheel sliding frame. Insert the grooved ring at one end of the tension spring into the small hole at the front end of the screw with holes I and ensure a secure engagement. Next, according to the horizontal direction of the tension spring in its horizontal extension state, machine a threaded through hole at the corresponding position on the side wall of the track inspection instrument. Screw the screw with holes II from the outside into the threaded hole and tighten it. Insert the grooved ring at the other end of the tension spring into the small hole at the front end of the screw with holes II to complete the installation of the elastic component. Finally, connect the signal wire of the displacement sensor to the control system of the track inspection instrument according to the wiring specifications, thus completing the overall installation of this utility model device. After the device is installed, the track inspection instrument equipped with the device is placed stably on the rail to be inspected. The staff manually adjusts the sliding frame of the measuring wheel to ensure smooth sliding. Then, the track inspection instrument is pushed to move at a constant speed along the rail axis. When the track inspection instrument passes through a curved track section, the measuring wheel generates synchronous displacement in real time under the elastic force of the tension spring as the shape of the curved track changes. The displacement sensor senses and collects the displacement of the measuring wheel in real time, converts the displacement data into an electrical signal, and transmits it to the control system in real time. The control system can obtain the actual rail gauge data after data processing and calculation.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. In the structural design of this utility model, the auxiliary track gauge measuring device is fixedly installed using bolt connections and is mounted on one side of the track inspection instrument. A tension spring is installed between the auxiliary track gauge measuring device and the track inspection instrument body as a core connecting component. Utilizing the spring's own rebound force, it continuously drives the measuring wheel to maintain a tight fit with the rail's working surface, forming a two-point track gauge measuring system in conjunction with the track inspection instrument's drive wheel. When performing track gauge measurement on curved tracks, the tension spring can adjust the measuring wheel in real time, ensuring it maintains a stable and tight fit with the rail's working surface. This controls the measuring wheel to generate synchronous displacement in real time according to the shape changes of the curved track. This structural design precisely solves the technical defects faced by the traditional "three-point measurement" technology on curved track sections: the traditional "three-point measurement" scheme, due to its fixed-space rigid structure design, cannot achieve complete adaptation with the continuous working surface of the curved rail, leading to deviations in the track gauge measurement results. This utility model, through the above structural optimization and improvement, effectively compensates for the shortcomings of traditional technology and significantly improves the accuracy and reliability of track gauge measurement data on curved tracks.

[0025] 2. This invention employs a high-precision displacement sensor to perceive and collect the displacement of the measuring wheel in real time, and transmits the displacement data to the control system in real time. The control system integrates data processing and result presentation functions, and can directly display the normal distance between the two rails and its changing status, effectively avoiding interference from factors such as curve radius, rail surface wear, and attitude changes on the measurement results. For complex curved tracks formed by combinations of multiple circular curves and transition curves, this invention can present the dynamic parameter changes such as the radius of curvature, widening amount, and superelevation value of different track sections in real time, and synchronously adapt to the above dynamic parameters, accurately reflecting the continuity of the gauge gradient, thereby meeting the application requirements of complex curved tracks for refined measurement data.

[0026] 3. This utility model has a simple structure and is easy to install. It only requires drilling corresponding threaded holes in a traditional track inspection instrument to complete installation and put it into use. During use, minimal manual intervention is required, effectively avoiding the problem of large dispersion in measurement data for the same curve segment caused by differences in different manual operation methods, thus ensuring the consistency and reliability of the measurement data. Furthermore, the maintenance and replacement operations of this utility model are simple and easy to perform. Workers only need to unscrew the fixing bolts to disassemble it, significantly shortening maintenance time and reducing maintenance costs. This, in turn, ensures the continuity and efficiency of track inspection work and reduces the impact of equipment maintenance on the inspection progress. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the auxiliary track gauge measuring device of this utility model. Figure 1 ;

[0028] Figure 2This is a schematic diagram of the overall structure of the auxiliary track gauge measuring device of this utility model. Figure 2 ;

[0029] Figure 3 This is an exploded view of the displacement sensor 3 of the auxiliary track gauge measuring device of this utility model;

[0030] Figure 4 This is an exploded view of the measuring wheel sliding frame 1 and tension spring 4 of the auxiliary track gauge measuring device of this utility model;

[0031] Figure 5 This is a front view schematic diagram of the auxiliary track gauge measuring device of this utility model;

[0032] Figure 6 This is a schematic diagram of the auxiliary track gauge measuring device of this utility model installed inside the groove of the track inspection instrument;

[0033] Figure 7 This is a top view of the auxiliary track gauge measuring device after installation.

[0034] Figure 8 This is an exploded view of the installation position of the auxiliary track gauge measuring device of this utility model;

[0035] Figure 9 This is an enlarged schematic diagram of the position of the auxiliary track gauge measuring device after installation.

[0036] Figure 10 This is a schematic diagram of the auxiliary track gauge measuring device of this utility model in use;

[0037] Figure 11 This is a schematic diagram illustrating the principle behind the error that occurs in the "three-point measurement" method of traditional track inspection instruments on curved sections;

[0038] Figure 12 This is a schematic diagram illustrating the principle of actual measurement of the curved segment of this utility model;

[0039] Figure 13 This is a reference diagram showing the usage status of the track inspection instrument equipped with this utility model.

[0040] Figure label:

[0041] 1-Measuring wheel sliding frame; 101-Frame body; 102-Frame column; 103-Mounting groove; 104-Bearing hole; 2-Sliding frame fixing seat; 3-Displacement sensor; 4-Tension spring; 5-Measuring wheel; 6-Sensing shaft; 601-Connecting shaft; 7-Sensor mounting seat; 8-Screw with hole I; 9-Screw with hole II; 10-Railway checker; 11-Magnetic ring; 12-Cut edge bearing; 13-Buffer washer; 14-Linear guide shaft; 15-Nut; 16-Railway. Detailed Implementation

[0042] To make the technical means, inventive features, objectives, and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Example

[0044] like Figure 1-3 As shown, an auxiliary track gauge measuring device based on a railway track inspection instrument includes a measuring wheel sliding frame 1, with a measuring wheel 5 mounted on the top of the measuring wheel sliding frame 1. The measuring wheel 5 is used to fit against the specified working surface for measuring the track gauge (16 mm below the top surface of the rail). The measuring wheel sliding frame 1 is mounted on the front sensing shaft 6 of the displacement sensor 3 in a sleeve manner, and the measuring wheel sliding frame 1 can slide freely.

[0045] The sliding frame fixing seat 2 has two pairs of four pieces, symmetrically arranged on both sides of the measuring wheel sliding frame 1. The top of the sliding frame fixing seat 2 has an opening slot, into which the two ends of the linear guide shaft 14 are inserted and fastened by screws.

[0046] Displacement sensor 3, one end of displacement sensor 3 is provided with sensing shaft 6, and sensing shaft 6 of displacement sensor 3 is connected and installed with sensor mounting base 7.

[0047] The tension spring 4 has a screw I8 with a hole at one end, which is connected to the threaded hole on the measuring wheel sliding frame 1. The tension spring 4 also has a screw II9 with a hole at the other end, which is connected to the threaded hole on the side wall of the track inspection instrument 10.

[0048] As shown in Figure 4, the measuring wheel sliding frame 1 consists of a frame 101, a support column 102, and a measuring wheel 5. A mounting groove 103 is formed in the middle of the frame 101 for assembling a magnetic ring 11. A through hole is machined in the center of the magnetic ring 11, the size of which matches the size of the through hole at the center of the bottom end face of the mounting groove 103 and the diameter of the sensing shaft 6. Threaded holes are machined on both sides of the through hole in the magnetic ring 11, allowing the magnetic ring 11 to be securely installed inside the mounting groove 103 using screws. Bearing holes 104 are symmetrically formed on both sides of the mounting groove 103, and a chamfered bearing 12 is installed inside each bearing hole 104. The chamfered bearing 12 is machined with a shape consistent with the straight... The through hole adapted to the wire guide shaft 14 has a flange structure at one end, and screw holes are machined at the upper and lower positions of the flange end face. The cutting bearing 12 can be stably fixed to the end face of the measuring wheel sliding frame by screws. The other end of the cutting bearing 12 passes through the bearing hole 104 and extends outward. A buffer washer 13 is provided on the end face of the extended end. The buffer washer 13 is used to prevent the cutting bearing 12 from colliding with the sliding frame fixing seat 2. The column 102 of the measuring wheel sliding frame 1 is vertically set at the middle position of the top surface of the frame 101 and is manufactured with the frame 101 by an integral molding process. The measuring wheel 5 is assembled on the round shaft at the top of the column 102 by spring washers.

[0049] like Figure 5 As shown, the displacement sensor 3 consists of a sensor mounting base 7 and a sensing shaft 6. A through hole is provided on the end face of the sensor mounting base 7, through which the sensing shaft 6 extends and connects to the measuring wheel sliding frame 1. The sensing shaft 6 can sense the sliding distance of the magnetic ring 11 in real time and transmit the signal to the main body of the displacement sensor 3. A connecting shaft 601 is fixedly connected to the other end of the sensing shaft 6. An external thread is machined on the outer wall of the connecting shaft 601, and this threaded section is located inside the through hole of the sensor mounting base 7. A mating nut 15 is provided on the portion of the connecting shaft 601 extending out of the through hole for initial positioning and tightening. The other end of the connecting shaft 601 and the main body of the displacement sensor 3 are integrally connected. Finally, the displacement sensor 3 and the sensor mounting base 7 are securely connected by tightening the nut 15.

[0050] As shown in Figure 6-10, the tension spring 4 is assembled from a set of screws I8 and II9 with holes. Both screws I8 and II9 have pre-machined small holes at their threaded ends. The two ends of the tension spring 4 are designed as semi-circular groove rings. During assembly, these semi-circular groove rings must pass through the aforementioned small holes to achieve precise assembly of the tension spring 4 with screws I8 and II9. Screw I8 engages with the pre-set threaded hole on the measuring wheel sliding frame 1, while screw II9 engages with the pre-set threaded hole on the side wall of the track inspector 10. After assembly, the tension spring 4 is positioned in the middle of screws I8 and II9, and structural positioning ensures it remains stable, preventing performance issues caused by positional deviation. Drill holes in the groove of the track inspector 10 body corresponding to the mounting holes of the sliding frame fixing seat 2 and the sensor mounting seat 7. During the machining process, the hole position accuracy must be strictly controlled to ensure that the machined hole and the mounting hole are completely aligned. After the drilling is completed, bolts are used to pass through the mounting holes of the sliding frame fixing seat 2 and the sensor mounting seat 7 and the groove machining holes to firmly fix the device in the groove of the track inspector 10, so as to achieve stable installation of the device.

[0051] like Figure 11-13 As shown, traditional track inspection instruments 10 mostly use the "three-point measurement" principle to measure the track gauge of track 16. However, when measuring curved sections of track 16, the "three-point measurement" method is difficult to simultaneously adapt to dynamically changing parameters such as the radius of curvature, widening, and superelevation of the curved section of track 16. Furthermore, the "three-point measurement" scheme, due to its rigid structure design with fixed spacing, cannot achieve complete adaptation with the continuous working surface of the curved rail 16, thus leading to deviations in the track gauge measurement results. This utility model improves the traditional track inspection instrument 10 by adding the device of this utility model, upgrading the traditional "three-point measurement" scheme to a "two-point measurement" scheme. Utilizing the rebound force of the tension spring 4, the measuring wheel 5 can be continuously driven to maintain a tight fit with the working surface of the track 16. When measuring the track gauge of the curved track 16, the measuring wheel 5 can generate synchronous displacement in real time according to the shape change of the curved track 16. The displacement sensor 3 senses and collects the displacement of the measuring wheel 5 in real time and transmits the displacement data to the control system in real time. The control system can obtain the real track gauge data through integrated data processing, thereby significantly improving the accuracy and reliability of the track gauge measurement data of the curved track 16.

[0052] Finally, it should be noted that the concept, specific structure, and technical effects of this utility model have been clearly and completely described above in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, the connection relationship mentioned herein does not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

Claims

1. An auxiliary track gauge measuring device based on a railway track inspection instrument, characterized in that, include: Measuring wheel sliding frame (1), the top of which is equipped with a measuring wheel (5), and the measuring wheel sliding frame (1) and the displacement sensor (3) are installed in a sleeve manner; Sliding frame fixing seat (2), the sliding frame fixing seat (2) is symmetrically arranged on both sides of the measuring wheel sliding frame (1) and is slidably connected to the measuring wheel sliding frame (1); Displacement sensor (3), one end of which is provided with a sensing shaft (6), the sensing shaft (6) passes through the sensor mounting base (7) and is connected to the measuring wheel sliding frame (1); A tension spring (4) is provided with a screw I (8) with a hole at one end, which is threaded to the measuring wheel sliding frame (1). A screw II (9) with a hole at the other end of the tension spring (4) is threaded to the track inspection instrument (10).

2. The auxiliary track gauge measuring device based on a railway track inspection instrument according to claim 1, characterized in that, The measuring wheel sliding frame (1) includes a frame (101), a column (102) and a measuring wheel (5). The frame (101) has a mounting groove (103) in the middle and bearing holes (104) are symmetrically opened on both sides of the mounting groove (103). The column (102) is vertically set on the top surface of the frame (101) and is made in one piece with the frame (101). The measuring wheel (5) is assembled on the top of the column (102).

3. The auxiliary track gauge measuring device based on a railway track inspection instrument according to claim 2, characterized in that, A magnetic ring (11) is installed inside the mounting groove (103). The magnetic ring (11) has a through hole in its center. The magnetic ring (11) is connected and fixed to the measuring wheel sliding frame (1) by screws.

4. The auxiliary track gauge measuring device based on a railway track inspection instrument according to claim 2, characterized in that, A scissor bearing (12) is installed in the bearing hole (104). One end of the scissor bearing (12) is flange-shaped, and a screw hole is provided on the flange end face. The scissor bearing (12) is connected and fixed to the measuring wheel sliding frame (1) by screws. The other end of the scissor bearing (12) passes through the bearing hole (104), and a buffer washer (13) is provided on the end face.

5. The auxiliary track gauge measuring device based on a railway track inspection instrument according to claim 4, characterized in that, The sliding frame fixing seat (2) includes a linear guide shaft (14). The top of the sliding frame fixing seat (2) is provided with an opening groove. The two ends of the linear guide shaft (14) are placed inside the opening groove and are fixedly connected by screws. The linear guide shaft (14) passes through the tangent bearing (12).

6. The auxiliary track gauge measuring device based on a railway track inspection instrument according to claim 3, characterized in that, The displacement sensor (3) includes a sensor mounting base (7) and a sensing shaft (6). A through hole is provided on the end face of the sensor mounting base (7). The sensing shaft (6) is slidably connected to the magnetic ring (11) to sense and transmit the sliding distance of the magnetic ring (11) in real time. A connecting shaft (601) is fixedly connected to one end of the sensing shaft (6). The sensing shaft (6) is connected to the displacement sensor (3) as a whole through the connecting shaft (601). The outer surface of the connecting shaft (601) is provided with an external thread and a nut (15) is provided to be fixedly connected to the sensor mounting base (7).

7. The auxiliary track gauge measuring device based on a railway track inspection instrument according to claim 1, characterized in that, The tension spring (4) includes a screw with holes I (8) and a screw with holes II (9). The threaded ends of the screw with holes I (8) and the screw with holes II (9) are provided with small holes. The two ends of the tension spring (4) are in the shape of semi-circular grooves. The semi-circular grooves pass through the small holes and are assembled and installed with the screw with holes I (8) and the screw with holes II (9).

8. The auxiliary track gauge measuring device based on a railway track inspection instrument according to claim 7, characterized in that, The screw with holes I (8) is connected and fixed to the measuring wheel sliding frame (1), and the screw with holes II (9) is installed on the side wall of the track inspector (10) and fixed thereto. The screw with holes I (8) and the screw with holes II (9) keep the tension spring (4) in a stable and free state. When the tension spring (4) is subjected to tension and deforms, it can drive the measuring wheel sliding frame (1) to slide linearly on the sensing shaft (6).

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