A rail straightness measuring instrument

Abstract

The utility model relates to measuring instrument technical field especially relates to a kind of steel rail flatness measuring instrument, including ruler body, the ruler body both ends are provided with insulating nylon block, main locating block and auxiliary locating block, the insulating nylon block one end is connected with the main locating block, the other end is connected with the ruler body, the auxiliary locating block is movably connected with the main locating block by switching pull block, the insulating nylon block inside is provided with adsorption magnet, the ruler body inside is provided with laser displacement sensor, linear guide and drive assembly, the laser displacement sensor is slidably connected with the linear guide by slider, the drive assembly is connected with the slider. Through the effect of main locating block, auxiliary locating block and adsorption magnet, the quick installation and fixation of measuring instrument above or side of steel rail are realized, the stability and accuracy of measurement are guaranteed, and without complex debugging steps, the field operation efficiency is improved.

Description

Technical Field

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

[0002] The straightness of rails is a key parameter for ensuring the safety, smoothness, and comfort of railway operations. The requirements for rail straightness are particularly stringent in high-speed and heavy-haul railways. Traditional rail straightness inspections often rely on manual tools such as straightedges and feeler gauges, which suffer from low efficiency, large subjective errors, and difficulty in quantifying and storing data. While some automated measuring equipment exists on the market, it is bulky, inconvenient to carry, and difficult to quickly and stably fix to the rails. This significantly limits its application in high-frequency, high-efficiency inspections at railway sites, failing to meet the practical needs of rapid, efficient, and accurate measurement in railway maintenance work.

[0003] Therefore, there is an urgent need in this field for a rail straightness measuring instrument that integrates high precision, high efficiency, portability, and ease of operation to meet the pressing needs of modern railway maintenance and inspection. Utility Model Content

[0004] The purpose of this utility model is to provide a rail straightness measuring instrument to address the shortcomings of existing technologies. This instrument solves the problems of insufficient accuracy, poor portability, and low operating efficiency of existing rail straightness measuring equipment.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a rail straightness measuring instrument, including a ruler body, with insulating nylon blocks, a main positioning block and an auxiliary positioning block arranged at both ends of the ruler body. One end of the insulating nylon block is connected to the main positioning block and the other end is connected to the ruler body. The auxiliary positioning block is movably connected to the main positioning block through a switching pull block. An adsorption magnet is arranged inside the insulating nylon block. A laser displacement sensor, a linear guide rail and a driving component are arranged inside the ruler body. The laser displacement sensor is slidably connected to the linear guide rail through a slider, and the driving component is connected to the slider.

[0006] Furthermore, the drive assembly includes a motor, a drive wheel, and a driven wheel. The drive wheel is connected to the driven wheel via a transmission rope, and both ends of the transmission rope are fixedly connected to the slider.

[0007] Furthermore, the auxiliary positioning block is fixedly connected to the switching pull block, and a limit unit is provided between the auxiliary positioning block and the main positioning block.

[0008] Furthermore, a pressing rod is provided inside the insulating nylon block, and a telescopic spring is sleeved on the pressing rod. The adsorption magnet is connected to the bottom of the pressing rod, and one end of the telescopic spring abuts against the insulating nylon block and the other end abuts against the pressing rod.

[0009] A measuring window is provided on one side of the main body of the ruler, and the measuring window is provided with a light-transmitting plate. The measuring window is correspondingly set with the laser displacement sensor.

[0010] Furthermore, a tensioning mechanism is also provided inside the main body of the ruler. The tensioning mechanism includes a tensioning wheel and a sliding mounting groove, and the tensioning wheel abuts against the transmission rope.

[0011] Furthermore, a circuit board and a power supply are disposed inside the main body of the ruler, and the power supply, motor, circuit board and laser displacement sensor are electrically connected.

[0012] Furthermore, the linear guide rail is provided with a first limiting unit at both ends. The first limiting unit includes a limiting block and a tactile switch, and the tactile switch is electrically connected to the circuit board.

[0013] Furthermore, a handle is provided on the outside of the ruler body.

[0014] The beneficial effects of this utility model are as follows: Through the action of the main positioning block, auxiliary positioning block, and adsorption magnet, the measuring instrument can be quickly installed and fixed on the top or side of the rail, ensuring the stability and accuracy of the measurement. Furthermore, it eliminates the need for complex debugging steps, improving on-site work efficiency. In addition, the positioning mechanism (main positioning block and auxiliary positioning block) is connected to the main body of the measuring instrument via insulating nylon blocks. When measuring the straightness of the rail's insulated joint, the insulating nylon blocks ensure that the rails at both ends are in a non-conductive state, avoiding interference from the complex circuit environment of the railway site on the measuring circuit. Simultaneously, it effectively buffers impact forces, preventing minor slippage of the measuring instrument and ensuring the accuracy of the measurement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 yes Figure 1 Side view.

[0017] Figure 3 This is a partial structural schematic diagram of the present invention.

[0018] Figure 4 yes Figure 3 Enlarged view of local structure A.

[0019] Figure 5 yes Figure 2 Side view.

[0020] Figure 6 yes Figure 5 A cross-sectional view along the AA direction.

[0021] Figure 7 This is a measurement diagram of the working surface at the top of the track.

[0022] Figure 8 This is a measurement diagram of the working surface on the track side.

[0023] Explanation of reference numerals in the attached figures: 1—Scale body, 2—Insulating nylon block, 3—Main positioning block, 4—Auxiliary positioning block, 5—Switching pull block, 6—Adsorption magnet, 7—Laser displacement sensor, 8—Linear guide rail, 9—Drive assembly, 91—Motor, 92—Driving wheel, 93—Driven wheel, 94—Transmission rope, 10—Slider, 11—Pressing rod, 12—Measuring window, 13—Tensioning mechanism, 131—Tensioning wheel, 132—Sliding mounting groove, 14—Circuit board, 15—Power supply, 16—Second limit unit, 161—Limit block, 162—Tactile switch. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the present invention.

[0025] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figures 1-8As shown, this embodiment of a rail straightness measuring instrument includes a main body 1 made of aluminum alloy square tubing, which is lightweight and robust. Insulating nylon blocks 2, main positioning blocks 3, and auxiliary positioning blocks 4 are provided at both ends of the main body 1. The main positioning blocks 3 and auxiliary positioning blocks 4 are made of wear-resistant stainless steel and are used to precisely clamp the main body 1 onto the rail head. One end of the insulating nylon block 2 is connected to the main positioning block 3, and the other end is connected to the main body 1. The auxiliary positioning block 4 is movably connected to the main positioning block 3 via a switching pull block 5. By switching the pull block 5, the auxiliary positioning block 4 can rotate 180°, thereby being clamped onto the top and side of the rail by the main positioning blocks 3 and auxiliary positioning blocks 4. The instrument achieves straightness measurement of the top and side working surfaces of the rail. During the measurement process, the insulating nylon block 2 helps to keep the measuring instrument and the rail in an open-circuit state, avoiding circuit interference and ensuring measurement accuracy. At the same time, the insulating nylon block 2 can effectively avoid data deviation caused by slight slippage after impact. The insulating nylon block 2 is equipped with an adsorption magnet 6, which can be firmly adsorbed onto the rail during measurement, achieving quick installation and fixation. The main body 1 of the ruler is equipped with a laser displacement sensor 7, a linear guide rail 8, and a drive assembly 9. The laser displacement sensor 7 is slidably connected to the linear guide rail 8 through a slider 10, and the drive assembly 9 is connected to the slider 10 to drive the slider 10 to slide along the linear guide rail 8.

[0028] The drive assembly 9 includes a motor 91, a drive wheel 92, and a driven wheel 93. The drive wheel 92 and the driven wheel 93 are located at opposite ends of the linear guide rail 8. The motor 91 is preferably a stepper motor. The motor 91 is connected to the drive wheel 92 by screws. The drive wheel 92 is connected to the driven wheel 93 by a transmission rope 94. Both ends of the transmission rope 94 are fixedly connected to the slider 10. Preferably, the transmission rope 94 is a steel wire rope or a PE rope. The motor 91 drives the drive wheel 92 to rotate, which in turn drives the driven wheel 93 to rotate through the tensioned transmission rope 94. This causes the slider 10 to slide along the linear guide rail 8, enabling the laser displacement sensor 7 to move at a constant speed along the linear guide rail 8, scanning the surface of the rail, and thus measuring the straightness of the top and side working surfaces of the rail.

[0029] The auxiliary positioning block 4 is fixedly connected to the switching pull block 5. A limiting unit is provided between the auxiliary positioning block 4 and the main positioning block 3. The limiting unit is preferably a protrusion or groove that cooperates with each other. When the switching pull block 5 is pulled outward, the protrusion and groove disengage. After the auxiliary positioning block 4 is rotated 180° and the switching pull block 5 is reset, the protrusion and groove re-engage, thus fixing the auxiliary positioning block 4. Preferably, the end of the switching pull block 5 passes through the insulating nylon block 2 and is magnetically connected to the adsorption magnet 6, or the end of the switching pull block 5 is provided with a telescopic spring to facilitate the reciprocating movement and fixing of the switching pull block 5.

[0030] The insulating nylon block 2 has a pressing rod 11 inside, and a telescopic spring is sleeved on the pressing rod 11. The adsorption magnet 6 is connected to the bottom of the pressing rod 11. One end of the telescopic spring abuts against the insulating nylon block 2, and the other end abuts against the pressing rod 11. After the main positioning block 3 and the auxiliary positioning block 4 are locked on the rail, the pressing rod 11 is pressed down, and the adsorption magnet 6 is adsorbed onto the surface to be measured, thereby fixing the measuring instrument above or to the side of the rail. This helps to enhance the stability of the measuring instrument and avoids the corresponding measurement results during slight shaking or vibration.

[0031] A measuring window 12 is provided on one side of the main body 1 of the ruler. The measuring window 12 is equipped with a light-transmitting plate. The measuring window 12 is correspondingly set with the laser displacement sensor 7. During the movement of the laser displacement sensor 7, the straightness of the top working surface and the side working surface of the rail is measured through the light-transmitting plate of the measuring window 12.

[0032] The main body 1 of the ruler is also provided with a tensioning mechanism 13. The tensioning mechanism 13 includes a tensioning wheel 131 and a sliding mounting groove 132. The tensioning wheel 131 abuts against the transmission rope 94. The mounting shaft of the tensioning wheel 131 is fixed in the sliding mounting groove 132. The sliding mounting groove 132 is provided with an adjusting screw. The tension of the transmission rope 94 is adjusted by adjusting the position of the tensioning wheel 131 by adjusting the adjusting screw.

[0033] The main body 1 of the ruler houses a circuit board 14 and a power supply 15. The power supply 15, the motor 91 of the drive assembly 9, the circuit board 14, and the laser displacement sensor 7 are electrically connected. Preferably, a Bluetooth module can also be provided. The motor 91 drives the slider 10 to move, and the slider 10 drives the laser displacement sensor 7 to move. The circuit board 14 receives data from the laser displacement sensor 7, performs Hampel filtering and other algorithm processing to eliminate outliers, and calculates the straightness deviation of the rail. The processing result is sent to the terminal device APP via Bluetooth and displayed intuitively in the form of numerical values ​​and curves. The main body 1 of the ruler has a measurement button and a USB interface on its exterior. This structure and connection method are existing technologies and will not be described in detail here.

[0034] The linear guide rail 8 has second limiting units 16 at both ends. Each limiting unit 16 includes a limiting block 161 and a tactile switch 162, which is electrically connected to the circuit board 14. The limiting block 161 limits the sliding position of the slider 10 on the linear guide rail 8. When the slider 10 slides to the end of the linear guide rail 8 and comes into contact with the limiting block 161, the slider 10 will touch the tactile switch 162, causing the tactile switch 162 to activate. This activation can be used to determine the position or distance the stepper motor drives the slider 10 to move, thereby clarifying the movement distance and position of the laser displacement sensor 7.

[0035] The main body 1 of the ruler is equipped with a handle on the outside, which makes it easy to carry the measuring instrument.

[0036] The working principle of this utility model is as follows: During measurement, the main positioning block 3 and the auxiliary positioning block 4 are respectively attached to the top and side surfaces of the rail. When the magnetic magnet 6 is pressed, the main body 1 of the ruler is fixed above or to the side of the rail by the action of the main positioning block 3, the auxiliary positioning block 4 and the magnetic magnet 6. When the measurement button on the measuring ruler is pressed, the motor 91 drives the slider 10 to move, which in turn moves the laser displacement measuring instrument, thereby realizing the measurement of the top and side working surfaces of the rail. This allows for the acquisition of distance data between the top and side working surfaces of the rail. The acquired data is processed by algorithms such as Hampel filtering to calculate the rail straightness deviation. The straightness data corresponding to each position on the rail can be obtained intuitively on the terminal device.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A rail straightness gauge, characterised in that: The device includes a ruler body (1), with insulating nylon blocks (2), a main positioning block (3), and an auxiliary positioning block (4) at both ends. One end of the insulating nylon block (2) is connected to the main positioning block (3), and the other end is connected to the ruler body (1). The auxiliary positioning block (4) is movably connected to the main positioning block (3) via a switching pull block (5). An adsorption magnet (6) is provided inside the insulating nylon block (2). A laser displacement sensor (7), a linear guide rail (8), and a drive assembly (9) are provided inside the ruler body (1). The laser displacement sensor (7) is slidably connected to the linear guide rail (8) via a slider (10), and the drive assembly (9) is connected to the slider (10).

2. A rail straightness measuring instrument according to claim 1, characterised in that: The drive assembly (9) includes a motor (91), a drive wheel (92) and a driven wheel (93). The drive wheel (92) is connected to the driven wheel (93) via a transmission rope (94). Both ends of the transmission rope (94) are fixedly connected to the slider (10).

3. A rail straightness measuring instrument according to claim 1, wherein: The auxiliary positioning block (4) is fixedly connected to the switching pull block (5), and a first limiting unit is provided between the auxiliary positioning block (4) and the main positioning block (3).

4. A rail straightness measuring instrument according to claim 1, wherein: The insulating nylon block (2) is provided with a pressing rod (11) inside. The pressing rod (11) is covered with a telescopic spring. The adsorption magnet (6) is connected to the bottom of the pressing rod (11). One end of the telescopic spring abuts against the insulating nylon block (2) and the other end abuts against the pressing rod (11).

5. A rail straightness measuring instrument according to claim 1, wherein: A measuring window (12) is provided on one side of the main body (1) of the ruler. The measuring window (12) is provided with a light-transmitting plate. The measuring window (12) is correspondingly provided with the laser displacement sensor (7).

6. A rail straightness measuring instrument according to claim 2, wherein: The body (1) of the ruler is also provided with a tensioning mechanism (13), which includes a tensioning wheel (131) and a sliding mounting groove (132). The tensioning wheel (131) abuts against the transmission rope (94).

7. A rail straightness measuring instrument as claimed in claim 1, wherein: The main body (1) of the ruler is internally equipped with a circuit board (14) and a power supply (15), and the power supply (15), the drive component (9), the circuit board (14) and the laser displacement sensor (7) are electrically connected.

8. A rail straightness measuring instrument according to claim 7, characterised in that: The linear guide (8) is provided with a first limiting unit (16) at both ends. The first limiting unit includes a limiting block (161) and a tactile switch (162). The tactile switch (162) is electrically connected to the circuit board (14).

9. A rail straightness measuring instrument according to claim 1 wherein: The main body (1) of the ruler is provided with a handle on the outside.

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