Steel rail profile measuring instrument

Abstract

The utility model provides a steel rail profile measuring instrument, and belongs to the technical field of steel rail measurement. In order to solve the problem that the steel rail profile measuring precision is poor, the steel rail profile measuring instrument comprises a base and a shell, and a laser emitting unit and a camera shooting unit are arranged on the base; a positioning panel which is used for contacting the top surface of the steel rail and supporting the steel rail profile measuring instrument is arranged below the base; the base is further provided with a measuring instrument positioning assembly, the measuring instrument positioning assembly comprises two positioning pieces, the two positioning pieces are used for synchronously abutting against the same side face of the steel rail, so that the steel rail profile measuring instrument is parallel to the steel rail, and the positioning pieces are rotationally connected with the steel rail profile measuring instrument. And the positioning piece can be overturned to the lowest point to be flush with the bottom surface of the steel rail profile measuring instrument. By adjusting the center of gravity of the measuring instrument, positioning the top surface of the steel rail through the positioning panel and positioning the side surface of the steel rail through the positioning piece, the measuring basis is parallel to the steel rail, and the measuring precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of rail measurement, and in particular to a rail profile measuring instrument. Background Art

[0002] Railway safety is the fundamental premise and foundation of high-speed railway transportation, and the state and performance of the rails themselves are directly related to the railway's transportation capacity and driving safety. Among them, abnormal wear of the rail surface is an important factor that cannot be ignored. This will lead to abnormal wheel-rail contact and increase the additional dynamic load on the track, affecting the smoothness of train operation and the comfort of passengers. It is necessary to promptly discover the damage of the rail surface and take corresponding measures such as grinding operations.

[0003] The existing rail profile measurement methods include contact measurement and non-contact measurement methods. The contact measurement method is divided into profile measurement and digital ruler measurement. Both require manual measurement of each key point on the profile of the measured point with a measuring tool. The detection efficiency is low and the accuracy is insufficient, and it is greatly affected by human factors. The non-contact measurement method requires the use of lasers and cameras to detect the cross-sectional profile of the rail, and the profile wear degree is analyzed by comparing the photographed profile with the standard profile.

[0004] Although non-contact measurement has higher accuracy, faster detection speed and more convenient operation than contact measurement, its accuracy is greatly affected by the measurement reference, that is, the deviation of the measuring instrument relative to the rail causes the measurement reference to deviate from the rail surface, resulting in poor measurement accuracy. Utility Model Content

[0005] The purpose of the present application is to solve the problem of poor rail profile measurement accuracy in the prior art. Therefore, the present application provides a rail profile measuring instrument, which improves the measurement accuracy by adjusting the center of gravity of the measuring instrument and positioning the top surface of the rail by the positioning panel and the side surface of the rail by the positioning member, ensuring that the measurement reference is parallel to the rail.

[0006] The embodiment of the present application provides a rail profile measuring instrument, comprising a base and a shell covered on the base, wherein a laser emitting unit and a camera unit are arranged on the base, wherein the laser emitting unit is used to emit laser toward the rail to display the corresponding profile, and the camera unit is used to obtain a profile image;

[0007] A positioning panel for contacting the top surface of the rail and supporting the rail profile measuring instrument is provided below the base;

[0008] The base is also provided with a measuring instrument positioning assembly, which includes two positioning members, and the two positioning members are used to synchronously abut against the same side of the rail so that the rail profile measuring instrument is parallel to the rail, and the positioning member is rotatably connected to the rail profile measuring instrument so that the positioning member can be flipped to its lowest point and flush with the bottom surface of the rail profile measuring instrument.

[0009] By adopting the above technical scheme, the center of gravity of the rail profile measuring instrument is lowered by arranging the laser emitting unit and the camera unit on the base of the rail profile measuring instrument, thereby improving its stability and further improving the measurement accuracy; and, by contacting the top surface of the rail and supporting the measuring instrument through the positioning panel, replaceable maintenance is achieved to ensure that the contact surface between the measuring instrument and the rail is always horizontal, thereby ensuring that the measuring instrument is parallel to the top surface of the rail, that is, the measurement reference is horizontal, and the measurement accuracy is improved; at the same time, by abutting the same side of the rail with two positioning members, it is ensured that the rail profile measuring instrument is parallel to the longitudinal direction of the rail, that is, the measurement reference always maintains the same relative position with the longitudinal direction of the rail, simulating the running state of a locomotive vehicle on the rail, thereby improving the measurement accuracy; and, the positioning member can be flipped for easy storage to avoid damage to the positioning member during carrying and transportation.

[0010] In some embodiments, the positioning member includes a mounting seat, a first abutment portion and a second abutment portion, the mounting seat is fixedly connected to the rail profile measuring instrument, the first abutment portion is rotatably connected to the mounting seat via a rotating shaft and can be flipped and embedded in the mounting seat, and the second abutment portion is rotatably connected to the end of the first abutment portion and can be flipped and embedded in the first abutment portion.

[0011] By adopting the above technical solution, the positioning seat is used to facilitate the installation of the positioning part as a whole and the rail profile measuring instrument, and the overall replacement and maintenance are convenient, thereby improving the convenience of installation and maintenance; and the abutment area can be extended through the second abutment part, thereby further improving the abutment stability and having a wider applicability.

[0012] In some embodiments, a groove and an extension portion are sequentially provided at the end of the second abutment portion along a direction away from the rotational connection with the first abutment portion, the groove is adapted to the rotating shaft, and the extension portion extends along the width direction of the second abutment portion, so that when the second abutment portion is embedded in the first abutment portion, the groove is engaged with the rotating shaft, and the extension portion abuts against the inner wall of the mounting seat.

[0013] By adopting the above technical solution, the groove and the extension portion are provided at the end of the second abutting portion, so that the stability of the second abutting portion when flipped and retracted is improved, and the operation is facilitated.

[0014] In some embodiments, the base is connected to a laser emission window and a camera window, and both the laser emission window and the camera window are covered with heating glass.

[0015] By adopting the above technical solution, the laser emission window and the camera window are covered by glass, thereby ensuring the overall sealing of the measuring instrument and protecting the internal electronic components of the measuring instrument; and, by adopting heated glass, the measuring instrument can achieve clear glass by opening the heated glass in an environment with large temperature and humidity differences, which causes the glass to fog and affects the shooting line of sight, thereby reducing the requirements for the measurement environment and improving the measurement flexibility.

[0016] In some embodiments, the rail profile measuring instrument is detachably connected to a positioning rod;

[0017] The two ends of the positioning rod are respectively provided with a connecting end and a positioning end;

[0018] The positioning rod is detachably connected to the rail profile measuring instrument through the connecting end, and contacts the top surface of another rail opposite to the rail on which the rail profile measuring instrument is placed through the positioning end, and supports the positioning rod; and

[0019] When the rail profile measuring instrument is connected to the positioning rod, the positioning panel and the positioning end are located on the same straight line extending laterally along the rail.

[0020] By adopting the above technical solution, the double positioning of the tracks on both sides is achieved through the cooperation between the positioning panel of the rail profile measuring instrument and the positioning end of the positioning rod, thereby further ensuring that the measurement reference position is parallel to the top surface of the track, that is, the same as the running reference plane of the locomotive vehicle on the track, thereby improving the measurement accuracy.

[0021] In some embodiments, the positioning end of the positioning rod is provided with a lifting block, and the lifting block is used to contact the top surface of another rail opposite to the rail on which the rail profile measuring instrument is placed, and to support the positioning rod;

[0022] The lifting block is made of insulating material.

[0023] By adopting the above technical scheme, the positioning rod is lifted by the lifting block at the positioning end, which facilitates the connection between the connecting end and the rail profile measuring instrument; and, by replacing and maintaining the lifting block, it is ensured that the contact surface between the positioning rod and the rail is always horizontal, thereby ensuring that the positioning end of the positioning rod is parallel to the top surface of the rail, that is, the measurement reference is horizontal, thereby improving the measurement accuracy; at the same time, the insulating lifting block ensures the overall insulation of the measuring instrument and the positioning rod, preventing the left and right rails from being connected, thereby improving the measurement safety.

[0024] In some embodiments, the rail profile measuring instrument and the connection end of the positioning rod are provided with a detachable connection component, the detachable connection component includes a connection shaft and a connection cylinder, one of which is provided on the side of the rail profile measuring instrument, and the other is provided on the connection end of the positioning rod;

[0025] The connecting shaft comprises a shaft body and a pin shaft vertically arranged at one end of the shaft body;

[0026] The connecting cylinder includes a cylinder body and a limit plate arranged at one end of the cylinder body, the limit plate is provided with a through hole adapted to the pin shaft so that the pin shaft passes through the limit plate from the cylinder body; a limit assembly is arranged on the side of the limit plate located outside the cylinder body, and the limit assembly is away from the through hole so as to limit the pin shaft passing through the limit plate from continuing to rotate.

[0027] By adopting the above technical solution, the connection shaft and the connection tube are matched, which is not only convenient for use and disassembly, but also can ensure the repeatability of installation accuracy, as well as the overall linearity and rigidity, thereby ensuring the measurement benchmark.

[0028] In some embodiments, the connecting shaft also includes a shaft cylinder sleeved on the outside of the shaft body, the pin shaft extends out of the shaft cylinder, and an elastic member is arranged between the shaft cylinder and the end of the shaft body away from the pin shaft, and the elastic member applies a driving force to the shaft body so that the shaft body has a tendency to drive the pin shaft to move toward the shaft cylinder.

[0029] In some embodiments, the side surface of the limiting plate located outside the barrel body has a guide surface, and the guide surface is used to guide the pin shaft from the through hole to the limiting assembly.

[0030] In some embodiments, the two positioning members are used to synchronously abut against the inner side surface of the rail;

[0031] The base is made of aluminum alloy, the shell and the positioning rod are both made of carbon fiber, and the positioning panel is made of alloy steel with a hardness greater than 55HRC.

[0032] By adopting the above technical solution, through the selection of materials for the base, shell and positioning rod, the strength is ensured and effective protection of internal components is achieved, and the overall weight is controlled and the portability is improved; in particular, by selecting the material and hardness of the positioning panel arranged on the base, the service life of the measuring instrument is further improved.

[0033] Other features and corresponding beneficial effects of the present application are described in the latter part of the specification, and it should be understood that at least some of the beneficial effects become obvious from the records in the specification of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the structure of the rail profile measuring instrument in the embodiment of the present application;

[0035] FIG. 2( a ) is a schematic structural diagram of a measuring instrument positioning assembly of a rail profile measuring instrument in an embodiment of the present application;

[0036] FIG2( b ) is a schematic diagram of the fully deployed structure of the measuring instrument positioning assembly of the rail profile measuring instrument in the embodiment of the present application;

[0037] Figure 3 is a schematic diagram of the structure of the positioning rod in the embodiment of the present application;

[0038] Figure 4 is a schematic cross-sectional structural diagram of a detachable connection component in an embodiment of the present application;

[0039] Figure 5 This is a schematic diagram of the usage status of an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 1. Rail profile measuring instrument;

[0042] 10. Base; 101. Laser emission window; 102. Camera window; 103. Positioning panel;

[0043] 11. Shell;

[0044] 12. handle; 13. positioning member; 131. mounting seat; 132. first abutting portion; 133. second abutting portion; 1331. groove; 1332. extension portion;

[0045] 3. Positioning rod; 31. Connecting end; 32. Positioning end; 321. Lifting block;

[0046] 4. Separable connecting assembly; 41. Connecting shaft; 411. Shaft body; 412. Pin; 42. Connecting cylinder; 421. Cylinder body; 422. Limiting plate; 4221. Limiting assembly; 43. Cylinder; 44. Elastic member. DETAILED DESCRIPTION

[0047] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0048] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0049] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0050] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description created by the present application, unless otherwise specified, "multiple" means two or more.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0053] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of the rail profile measuring instrument 1 in the embodiment of the present application.

[0054] In one embodiment, the rail profile measuring instrument 1 includes a base 10 and a housing 11 covering the base 10 .

[0055] Preferably, a handle 12 is also provided on the top of the housing 11 (eg Figure 3 It is convenient for on-site testing personnel to carry.

[0056] In one embodiment, a laser emitting unit and a camera unit are provided on the base 10. The laser emitting unit is used to emit laser toward the rail to display the corresponding profile, and the camera unit is used to obtain a profile image, that is, the rail profile is displayed by laser, and a laser profile image is obtained. In addition, by arranging the laser emitting unit and the camera unit on the base 10 of the rail profile measuring instrument 1, the center of gravity of the rail profile measuring instrument 1 is lowered, thereby improving its stability, thereby improving the measurement accuracy.

[0057] In one embodiment, the base 10 is made of aluminum alloy, which is a metal material widely used in industry, light in weight, high in strength, and economical. The base 10 is made of aluminum alloy and combined with a machining process to provide a stable and high-strength reference platform for fixing the laser emitting unit and the camera unit.

[0058] In one embodiment, the shell 11 is made of carbon fiber, which has low density, high strength and corrosion resistance, thereby reducing the weight of the measuring instrument and making it convenient for staff to carry it on-site for measurement, while ensuring the overall aesthetics and strength of the measuring instrument.

[0059] It is understandable that the base 10 is connected with a laser emission window 101 and a camera window 102 to achieve measurement.

[0060] In one embodiment, the laser emission window 101 and the camera window 102 are both covered with heated glass. The laser emission unit emits a line laser through the heated glass, and the laser contour is captured by the camera unit. The two are used together to build a triangulation relationship to measure the rail contour. By covering the laser emission window 101 and the camera window 102 with glass, the overall sealing of the measuring instrument is ensured, and the internal electronic components of the measuring instrument are protected. In addition, the heated glass heating function can be turned on in an environment with a large difference in temperature and humidity, which causes the glass to fog and affect the shooting line of sight, and it can be automatically turned off after running for 10 minutes, for example, which reduces the requirements for the measurement environment and improves the measurement flexibility.

[0061] In one embodiment, a measuring instrument panel function interface is also provided on the base 10 for hidden design. For example, a WiFi antenna and a heated glass switch are designed at the bottom of the base 10 without affecting the function. The WiFi antenna mainly enhances the wireless transmission signal.

[0062] In one embodiment, a lithium battery is also provided on the base 10, and the measuring instrument can be turned on and off by a main switch.

[0063] In one embodiment, the side and rear of the housing 11 are provided with external function interfaces for ease of use and to ensure the appearance of the instrument without affecting the overall function. The external function interfaces include but are not limited to an external network port, a main switch, a charging port, and a power display panel.

[0064] In one embodiment, a positioning panel 103 for contacting the top surface of the rail and supporting the rail profile measuring instrument 1 is provided below the base 10 of the rail profile measuring instrument 1. By contacting the top surface of the rail and supporting the measuring instrument through the positioning panel 103, replaceable maintenance is achieved to ensure that the contact surface between the measuring instrument and the rail is always horizontal, thereby ensuring that the measuring instrument is parallel to the top surface of the rail, that is, the measurement reference is horizontal, thereby improving the measurement accuracy.

[0065] Preferably, the positioning panel 103 is made of alloy steel with a hardness greater than 55HRC to meet the long-term test contact surface wear requirements. Tempering and quenching are usually used to make its hardness meet the standard and facilitate replacement and maintenance to extend the service life of the measuring instrument.

[0066] See also Figure 2(a)-2(b) FIG. 2( a ) is a schematic diagram of the structure of the measuring instrument positioning assembly of the rail profile measuring instrument 1 in the embodiment of the present application; FIG. 2( b ) is a schematic diagram of the fully expanded structure of the measuring instrument positioning assembly of the rail profile measuring instrument 1 in the embodiment of the present application.

[0067] In one embodiment, the rail profile measuring instrument 1 is provided with a measuring instrument positioning assembly, which includes two positioning members 13, which are used to synchronously abut against the same side of the rail, preferably the inner side, and determine a straight line through two points, so that the rail profile measuring instrument 1 is parallel to the longitudinal direction of the rail, that is, the measurement reference always maintains the same relative position with the longitudinal direction of the rail, simulating the running state of a locomotive vehicle on the rail, thereby improving the measurement accuracy. Preferably, the positioning member 13 abuts against the top surface of the rail 16 mm downward.

[0068] In one embodiment, the positioning member 13 is rotatably connected to the rail profile measuring instrument 1 so that the positioning member 13 can be flipped to its lowest point flush with the bottom surface of the rail profile measuring instrument 1 to facilitate storage and avoid damage to the positioning member 13.

[0069] In one embodiment, the positioning member 13 includes a mounting seat 131, a first abutting portion 132 and a second abutting portion 133. The mounting seat 131 is fixedly connected to the rail profile measuring instrument 1. The first abutting portion 132 is rotatably connected to the mounting seat 131 through a rotating shaft and can be flipped and embedded in the mounting seat 131. The second abutting portion 133 is rotatably connected to the end of the first abutting portion 132 and can be flipped and embedded in the first abutting portion 132. The mounting seat 131 facilitates the installation of the positioning member 13 as a whole with the rail profile measuring instrument 1, and facilitates the replacement and maintenance of the whole, thereby improving the convenience of installation and maintenance. In addition, the abutting area can be extended by the second abutting portion 133, and the abutting stability can be improved, thereby ensuring that the rail profile measuring instrument 1 is parallel to the rail, and has a wider applicability.

[0070] In one embodiment, a groove 1331 and an extension portion 1332 are sequentially provided at the end of the second abutment portion 133 along a direction away from the rotational connection with the first abutment portion 132, the groove 1331 is adapted to the rotating shaft, and the extension portion 1332 extends along the width direction of the second abutment portion 133, so that when the second abutment portion 133 is embedded in the first abutment portion 132, the groove 1331 is engaged with the rotating shaft, and the extension portion 1332 abuts against the inner wall of the mounting seat 131, thereby improving the stability of the second abutment portion 133 when it is flipped and retracted.

[0071] See also Figure 3 , Figure 3 It is a schematic diagram of the usage status in the embodiment of the present application.

[0072] In one embodiment, the rail profile measuring instrument 1 is detachably connected to a positioning rod 3 .

[0073] See also Figure 4 , Figure 4 Schematic diagram of the structure of the positioning rod in the embodiment of the present application.

[0074] In one embodiment, a connecting end and a positioning end are respectively provided at both ends of the positioning rod 3. The positioning rod 3 is detachably connected to the rail profile measuring instrument 1 via the connecting end 31, and contacts the top surface of another rail opposite to the rail on which the rail profile measuring instrument 1 is placed via the positioning end 32, and supports the positioning rod 3, that is, through the cooperation of the positioning panel 103 of the rail profile measuring instrument 1 and the positioning end 32 of the positioning rod 3, double positioning of the rails on both sides is achieved, thereby further ensuring that the measurement reference position is parallel to the top surface of the rail, that is, the same as the running reference surface of the locomotive vehicle on the rail, thereby improving the measurement accuracy.

[0075] In one embodiment, when the rail profile measuring instrument 1 is connected to the positioning rod 3, the positioning panel 103 and the positioning end 31 are located on the same straight line extending laterally along the rail, further simulating the running state of the locomotive vehicle on the track and improving the measurement accuracy.

[0076] In one embodiment, the positioning end 32 of the positioning rod 3 is provided with a lifting block 321, which is used to contact the top surface of another rail opposite to the rail on which the rail profile measuring instrument 1 is placed, and to support the positioning rod 3, thereby lifting the positioning rod 3, and facilitating the connection between the connecting end 31 and the rail profile measuring instrument 1. In addition, by replacing and maintaining the lifting block 321, it is ensured that the contact surface between the positioning rod 3 and the rail is always horizontal, thereby ensuring that the positioning end 32 of the positioning rod 3 is parallel to the top surface of the rail, that is, the measurement reference is horizontal, thereby improving the measurement accuracy.

[0077] In one embodiment, the lifting block 321 is made of insulating material, which ensures the overall insulation of the measuring instrument and the positioning rod 3, prevents the left and right rails from being connected, and improves the measurement safety.

[0078] Preferably, the lifting block 321 is a nylon block, which ensures the lightness of the overall weight and the convenience of carrying while having a certain strength.

[0079] In one embodiment, the positioning rod 3 is retractable, so as to facilitate the storage, carrying and transportation of the positioning rod 3 .

[0080] In one embodiment, the positioning rod 3 is made of carbon fiber, which ensures strength and is not easy to be damaged, while controlling the overall weight and improving portability.

[0081] See also Figure 5 , Figure 5 It is a schematic cross-sectional structural diagram of the detachable connection component 4 in the embodiment of the present application.

[0082] In a specific embodiment, the connection end 31 of the rail profile measuring instrument 1 and the positioning rod 3 is provided with a detachable connection component 4 to achieve a detachable connection.

[0083] In one embodiment, the detachable connection assembly 4 includes a connection shaft 41 and a connection cylinder 42 adapted to the connection shaft 41, and one of the two is arranged on the side of the rail profile measuring instrument 1, and the other is arranged on the connection end 31 of the positioning rod 3. Preferably, the connection shaft 41 is arranged on the side of the rail profile measuring instrument 1, and the connection cylinder 42 is arranged on the connection end 31 of the positioning rod 3.

[0084] The connecting shaft 41 includes a shaft body 411 and a pin shaft 412 vertically arranged at one end of the shaft body 411 .

[0085] The connecting cylinder 42 includes a cylinder body 421 and a stop plate 422 disposed at one end of the cylinder body 421. The stop plate 422 is provided with a through hole adapted to the pin shaft 412, so that the pin shaft 412 passes through the stop plate 422 from the cylinder body 421, thereby cooperating with the connecting shaft 41 or the connecting cylinder 42 to rotate, and the pin shaft 412 is engaged with the stop plate 422, thereby realizing the connection between the connecting shaft 41 and the connecting cylinder 42. The detachable connecting assembly 4 is not only convenient for use and disassembly, but also can ensure repeatable installation accuracy, as well as overall linearity and rigidity, thereby ensuring the measurement benchmark.

[0086] In one embodiment, a limiting assembly 4221 is provided on the side of the limiting plate 422 located outside the tube body 421, and the limiting assembly 4221 is away from the through hole to limit the pin shaft 412 passing through the limiting plate 422 from continuing to rotate, thereby improving the convenience of operation and the connection reliability between the connecting shaft 41 and the connecting tube 42.

[0087] The limiting component 4221 may include but is not limited to a limiting groove, a limiting abutment block, etc.

[0088] In one embodiment, the connecting shaft 41 further includes a shaft cylinder 43 sleeved on the outside of the shaft body 411, the pin 412 extends out of the shaft cylinder 43, and an elastic member 44 is provided between the shaft cylinder 43 and the end of the shaft body 411 away from the pin 412. The elastic member 44 applies a driving force to the shaft body 411, so that the shaft body 411 has a tendency to drive the pin 412 to move toward the shaft cylinder 43, thereby further improving the connection reliability of the connecting shaft 41 and the connecting cylinder 42. The elastic member 44 can be a spring, a spring, etc.

[0089] In one embodiment, the side surface of the limiting plate 422 located outside the barrel body 421 has a guide surface, and the guide surface is used to guide the pin shaft 412 from the through hole to the limiting component 4221, further improving the convenience of operation.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rail profile measuring instrument, characterized in that: It comprises a base and a shell covered on the base, wherein a laser emitting unit and a camera unit are arranged on the base, wherein the laser emitting unit is used to emit laser toward the rail to display the corresponding profile, and the camera unit is used to obtain a profile image; A positioning panel for contacting the top surface of the rail and supporting the rail profile measuring instrument is provided below the base; The base is also provided with a measuring instrument positioning assembly, which includes two positioning members, and the two positioning members are used to synchronously abut against the same side of the rail so that the rail profile measuring instrument is parallel to the rail, and the positioning member is rotatably connected to the rail profile measuring instrument so that the positioning member can be flipped to its lowest point and flush with the bottom surface of the rail profile measuring instrument.

2. The rail profile measuring instrument according to claim 1, characterized in that: The positioning member includes a mounting seat, a first abutment portion and a second abutment portion. The mounting seat is fixedly connected to the rail profile measuring instrument. The first abutment portion is rotatably connected to the mounting seat via a rotating shaft and can be flipped and embedded in the mounting seat. The second abutment portion is rotatably connected to the end of the first abutment portion and can be flipped and embedded in the first abutment portion.

3. The rail profile measuring instrument according to claim 2, characterized in that: The end of the second abutment portion is provided with a groove and an extension portion in sequence along a direction away from the rotational connection with the first abutment portion, the groove is adapted to the rotating shaft, and the extension portion extends along the width direction of the second abutment portion, so that when the second abutment portion is embedded in the first abutment portion, the groove is engaged with the rotating shaft, and the extension portion abuts against the inner wall of the mounting seat.

4. The rail profile measuring instrument according to claim 1, characterized in that: The base is connected with a laser emission window and a camera window, and both the laser emission window and the camera window are covered with heating glass.

5. The rail profile measuring instrument according to any one of claims 1 to 4, characterized in that: The rail profile measuring instrument is detachably connected to a positioning rod; The two ends of the positioning rod are respectively provided with a connecting end and a positioning end; The positioning rod is detachably connected to the rail profile measuring instrument through the connecting end, and contacts the top surface of another rail opposite to the rail on which the rail profile measuring instrument is placed through the positioning end, and supports the positioning rod; and When the rail profile measuring instrument is connected to the positioning rod, the positioning panel and the positioning end are located on the same straight line extending laterally along the rail.

6. The rail profile measuring instrument according to claim 5, characterized in that: The positioning end of the positioning rod is provided with a lifting block, and the lifting block is used to contact the top surface of another rail opposite to the rail on which the rail profile measuring instrument is placed, and to support the positioning rod; The lifting block is made of insulating material.

7. The rail profile measuring instrument according to claim 5, characterized in that: The rail profile measuring instrument and the connection end of the positioning rod are provided with a detachable connection component, the detachable connection component includes a connection shaft and a connection cylinder, one of which is provided on the side of the rail profile measuring instrument, and the other is provided on the connection end of the positioning rod; The connecting shaft comprises a shaft body and a pin shaft vertically arranged at one end of the shaft body; The connecting cylinder includes a cylinder body and a limit plate arranged at one end of the cylinder body, the limit plate is provided with a through hole adapted to the pin shaft so that the pin shaft passes through the limit plate from the cylinder body; a limit assembly is arranged on the side of the limit plate located outside the cylinder body, and the limit assembly is away from the through hole so as to limit the pin shaft passing through the limit plate from continuing to rotate.

8. The rail profile measuring instrument according to claim 7, characterized in that: The connecting shaft also includes a shaft cylinder sleeved on the outside of the shaft body, the pin extending out of the shaft cylinder, and an elastic member is arranged between the shaft cylinder and the end of the shaft body away from the pin, and the elastic member applies a driving force to the shaft body, so that the shaft body has a tendency to drive the pin to move toward the shaft cylinder.

9. The rail profile measuring instrument according to claim 8, characterized in that: The side surface of the limiting plate located outside the barrel body has a guide surface, and the guide surface is used to guide the pin shaft from the through hole to the limiting assembly.

10. The rail profile measuring instrument according to claim 5, characterized in that: The two positioning members are used to synchronously abut against the inner side surface of the rail; The base is made of aluminum alloy, the shell and the positioning rod are both made of carbon fiber, and the positioning panel is made of alloy steel with a hardness greater than 55HRC.

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