A speed measuring device mounted on the bottom of a train

Abstract

The utility model discloses a kind of speed measuring device installed at the bottom of train, including the installation mainboard fixed at the bottom of train and the speedometer being arranged below installation mainboard, the bottom center position of installation mainboard is equipped with assembly sleeve, speedometer is detachably assembled in assembly sleeve from bottom to top, installation mainboard below is also equipped with shroud, shroud covers speedometer, the bottom center position of shroud is equipped with speed measuring port, shroud is equipped in speed measuring port with guard plate.The utility model is suitable for the speed measuring device by being provided with the shroud of trapezoidal structure outside speedometer, speedometer can be coated by shroud, realize the all-round protection to speedometer, improve the security of speedometer, and the shroud of this trapezoidal structure, it can guide flow generated by train travel, reduce the damage of airflow to speedometer, airflow can be avoided directly with speedometer contact simultaneously, guarantee the stability of speedometer, to improve the accuracy of detection data.

Description

Technical Field

[0001] This utility model relates to the field of train speed measuring instrument technology, and in particular to a speed measuring device installed on the bottom of a train. Background Technology

[0002] In modern railway transportation, accurate train speed measurement is crucial for safe operation and system scheduling. Traditional speed measurement technologies mainly include track speed measurement, wheel and axle speed measurement, and GPS speed measurement. While these methods can provide train speed information to some extent, they each have limitations, such as sensitivity to environmental conditions, installation complexity, and maintenance difficulty. To address these issues, in recent years, non-contact speed measurement devices, especially laser velocimeters, have been gradually introduced into railway systems, providing a high-precision and real-time monitoring solution.

[0003] However, installing non-contact speed measuring devices such as laser velocimeters on the underside of trains presents a series of technical challenges. First, strong airflow is generated under the train during high-speed travel. This airflow can not only affect the propagation of the laser beam but also disturb the installation position of the speed measuring device, thus affecting measurement accuracy. Second, the area under the train is a complex working environment, often containing hard objects such as gravel and debris. These objects may directly impact and damage the speed measuring device during high-speed train travel. Furthermore, most existing speed measuring devices lack effective protective structures, making them vulnerable to damage in this complex environment, reducing the reliability and lifespan of the equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing speed measuring devices, which mostly lack effective protective structures, making them susceptible to damage in complex environments and reducing the reliability and service life of the equipment. This invention provides a speed measuring device installed at the bottom of a train. This device features a trapezoidal protective cover on the outside of the speed measuring instrument, providing comprehensive protection and enhancing its safety. Furthermore, this trapezoidal protective cover can guide the airflow generated by the train's movement, reducing damage to the speed measuring instrument. Simultaneously, it prevents direct contact between the airflow and the speed measuring instrument, ensuring its stability and improving the accuracy of the detection data.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model discloses a speed measuring device installed on the bottom of a train, including a mounting main board fixed to the bottom of the train and a speed measuring instrument disposed below the mounting main board. The mounting main board has a mounting kit installed at the bottom center position, and the speed measuring instrument is detachably assembled in the mounting kit from bottom to top.

[0007] Below the mounting motherboard is a protective cover that covers the speedometer. A speed measuring port is provided at the bottom center of the protective cover, and a protective plate is installed inside the speed measuring port. A control mechanism for controlling the movement of the protective plate is installed inside the protective cover.

[0008] As a further description of the above technical solution: specifically, such as Figures 2-3 As shown, in order to ensure the protective effect of the shield and reduce air resistance during train travel, in this embodiment, the shield adopts a trapezoidal structure, with the two inclined surfaces of the shield located on both sides of the train travel direction, and multiple air guide grooves provided on both inclined surfaces of the shield.

[0009] As a further description of the above technical solution: specifically, such as Figures 3-6 As shown, in order to achieve detachable installation of the protective cover, in this embodiment, both ends of the protective cover are provided with a first bracket in an H-shape, and a first slot adapted to the first bracket is opened on the side of the mounting motherboard. The first bracket is slidably inserted into the first slot and fixed by bolts.

[0010] As a further description of the above technical solution: upright plates are installed on both sides of the protective cover and on the lower sides of the mounting motherboard. Side panels are snapped onto both sides of the protective cover, and the side panels are fixedly connected to the upright plates by bolts, which can ensure that the protective cover can be detached and assembled.

[0011] As a further description of the above technical solution: the inner side of the shield is also provided with a second bracket with an inclined structure, and the side of the mounting motherboard is provided with a second slot adapted to the second bracket, so that when the second bracket is inserted into the second slot, the second bracket, the shield and the mounting motherboard form a triangular support structure, thereby improving the stability and strength of the shield.

[0012] As a further description of the above technical solution: an inner cavity for the movement of the protective plate is provided inside the lower part of the protective cover, and a sliding groove is provided on one side of the protective plate in the direction perpendicular to the direction of movement;

[0013] The control mechanism includes a slider, an electric push rod, and a diagonal pull rod. The slider is slidably assembled in the groove. One end of the diagonal pull rod is rotatably connected to the slider, and the other end is rotatably connected to the corner of the inner cavity. One end of the electric push rod is movably mounted on the diagonal pull rod, and the other end is mounted on the inner wall of the inner cavity. When the electric push rod is running, it can move the guard plate by pushing and pulling the diagonal pull rod, thereby controlling the opening and closing of the speed measuring port.

[0014] As a further description of the above technical solution: specifically, such as Figure 4, Figure 7 and Figure 8 As shown, in order to achieve detachable installation of the speed measuring instrument, in this embodiment, a threaded groove is provided on the side of the speed measuring instrument, and a locking component is screwed into the threaded groove to lock and fix the speed measuring instrument into the mounting assembly.

[0015] As a further description of the above technical solution: specifically, such as Figure 4 , Figure 7 and Figure 8 As shown, to facilitate the installation and disassembly of the speed measuring instrument, in this embodiment, the mounting kit has locking slots on both sides. The locking assembly includes a main component and a wedge pin. The main component has a cavity inside, and the wedge pin is fixedly connected to the cavity by a spring. One end of the wedge pin extends out of the cavity under the push of the spring and engages in the locking slot. This structure allows for easy and quick operation. When installing the speed measuring instrument, simply push it into the mounting kit until the wedge pin engages in the locking slot. When disassembling the speed measuring instrument, simply press the wedge pin to disengage it from the locking slot, and then remove the speed measuring instrument downwards.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This speed measuring device features a trapezoidal protective cover around the speedometer, providing comprehensive protection and enhancing its safety. Furthermore, this trapezoidal cover guides the airflow generated by the train, reducing damage to the speedometer. It also prevents direct contact between the airflow and the speedometer, ensuring its stability and improving the accuracy of the measured data.

[0018] The speed measuring device adopts a detachable installation structure, meaning that both the speed measuring instrument and the protective cover are detachable. Therefore, it is convenient and quick to operate when maintenance or replacement is required. The speed measuring instrument is locked in the device by a locking component, and only simple operations are needed to install or remove the speed measuring instrument. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0021] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the motherboard mounting structure in this utility model;

[0023] Figure 5 This is a schematic diagram of the protective cover structure in this utility model;

[0024] Figure 6 This is a schematic diagram of the installation structure of the control mechanism in this utility model;

[0025] Figure 7 This is a schematic diagram of the speed measuring instrument structure in this utility model;

[0026] Figure 8 This is a schematic diagram of the card assembly structure in this utility model.

[0027] Reference numerals: 1. Main board installation; 10. First slot; 11. Second slot; 12. Matching assembly; 120. Locking port; 13. Vertical plate; 2. Protective cover; 20. Flow guide channel; 21. Speed ​​measuring port; 22. Protective plate; 220. Slide groove; 23. First insert; 24. Second insert; 25. Inner cavity; 3. Side panel; 4. Speedometer; 40. Threaded groove; 5. Control mechanism; 50. Slider; 51. Electric push rod; 52. Diagonal tie rod; 6. Engaging assembly; 60. Main component; 600. Cavity; 61. Spring; 62. Wedge pin. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 This invention further illustrates a specific embodiment of a speed measuring device installed on the bottom of a train. It overcomes the shortcomings of existing speed measuring devices, which often lack effective protective structures, making them susceptible to damage in complex environments and reducing their reliability and lifespan. This speed measuring device features a trapezoidal protective cover around the speedometer, providing comprehensive protection and enhancing its safety. Furthermore, this trapezoidal cover guides the airflow generated by the train's movement, reducing damage to the speedometer. It also prevents direct contact between the airflow and the speedometer, ensuring its stability and improving the accuracy of the detection data. This invention, a speed measuring device installed on the bottom of a train, is not limited to the embodiments described below.

[0029] Example 1:

[0030] This embodiment provides a speed measuring device installed on the bottom of a train, such as... Figures 1-8 As shown, it includes a mounting main board 1 fixed to the bottom of the train and a speed measuring instrument 4 disposed below the mounting main board 1. The mounting main board 1 has a mounting kit 12 installed at the bottom center position, and the speed measuring instrument 4 is detachably mounted in the mounting kit 12 from bottom to top.

[0031] Below the mainboard 1, there is a protective cover 2, which covers the speed measuring instrument 4. A speed measuring port 21 is opened at the bottom center of the protective cover 2. A protective plate 22 is installed inside the speed measuring port 21. A control mechanism 5 for controlling the movement of the protective plate 22 is installed inside the protective cover 2.

[0032] By adopting the above technical solution:

[0033] Working principle: When using this speed measuring device, the main mounting plate 1 is first fixedly installed at a predetermined position on the bottom of the train. Then, the matching speed measuring instrument is assembled from bottom to top inside the mounting plate 12. Finally, the protective cover 2 is installed below the main mounting plate 1. After the protective cover 2 is installed, it covers the speed measuring instrument 4, forming a protective structure. During the speed measuring period, the speed measuring port 21 is in the open state, and during the non-speed measuring period, the speed measuring port 21 is in the closed state. The opening and closing of the speed measuring port 21 is controlled by the control mechanism 5 to move the protective plate 22, thereby protecting the speed measuring instrument 4. In addition, both the speed measuring instrument 4 and the protective cover 2 are detachable, so it is convenient and quick to operate when maintenance or replacement is required. It should be noted that the speed measuring instrument 4 is a laser speed measuring instrument, which calculates the train's running speed data by emitting a laser beam and receiving its reflected signal. If the laser beam can correctly illuminate a fixed target, such as a track or a specific mark, the train speed can be determined by measuring the reflection time and frequency change of the laser beam.

[0034] Specifically, such as Figures 2-3 As shown, in order to ensure the protective effect of the shield 2 and reduce the air resistance during the train's movement, in this embodiment, the shield 2 adopts a trapezoidal structure, with the two inclined surfaces of the shield 2 located on both sides of the train's direction of travel, and multiple guide grooves 20 are provided on both inclined surfaces of the shield 2.

[0035] Specifically, such as Figures 3-6 As shown, in order to achieve the detachable installation of the protective cover 2, in this embodiment, both ends of the protective cover 2 are provided with a first bracket 23 in an H-shape, and a first slot 10 adapted to the first bracket 23 is opened on the side of the mounting motherboard 1. The first bracket 23 is slidably inserted into the first slot 10 and fixed by bolts.

[0036] Upright plates 13 are installed on both sides of the protective cover 2 and on the lower sides of the main board 1. Side panels 3 are snapped onto both sides of the protective cover 2. The side panels 3 are fixedly connected to the upright plates 13 by bolts, which ensures that the protective cover 2 can be disassembled and assembled.

[0037] Specifically, such as Figures 3-6As shown, in order to improve the strength of the shield 2 after installation, in this embodiment, the inner side of the shield 2 is also provided with a second bracket 24 with an inclined structure, and the side position of the mounting motherboard 1 is provided with a second slot 11 adapted to the second bracket 24, so that when the second bracket 24 is inserted into the second slot 11, the second bracket 24, the shield 2 and the mounting motherboard 1 form a triangular support structure, thereby improving the stability and strength of the shield 2.

[0038] Specifically, such as Figures 3-6 As shown, in order to realize the opening and closing control of the speed measuring port 21, in this embodiment, an inner cavity 25 for the movement of the protective plate 22 is provided in the lower interior of the protective cover 2, and a sliding groove 220 is provided on one side of the protective plate 22 along the vertical direction of the movement direction.

[0039] The control mechanism 5 includes a slider 50, an electric push rod 51, and a diagonal pull rod 52. The slider 50 is slidably assembled in the slide groove 220. One end of the diagonal pull rod 52 is rotatably connected to the slider 50, and the other end is rotatably connected to the corner of the inner cavity 25. One end of the electric push rod 51 is movably mounted on the diagonal pull rod 52, and the other end is mounted on the inner wall of the inner cavity 25. When the electric push rod 51 is running, it can push and pull the diagonal pull rod 52 to realize the movement control of the guard plate 22, thereby realizing the opening and closing control of the speed measuring port 21.

[0040] Example 2:

[0041] This embodiment provides a speed measuring device installed on the bottom of a train, such as... Figure 4 , Figure 7 and Figure 8 As shown, in order to achieve the detachable installation of the speed measuring instrument 4, in this embodiment, a threaded groove 40 is provided on the side of the speed measuring instrument 4, and a locking component 6 is screwed into the threaded groove 40 to lock and fix the speed measuring instrument 4 into the mounting assembly 12.

[0042] Specifically, such as Figure 4 , Figure 7 and Figure 8 As shown, to facilitate the installation and disassembly of the speed measuring device 4, in this embodiment, locking slots 120 are provided on both sides of the mounting kit 12. The engaging component 6 includes a main component 60 and a wedge pin 62. The main component 60 has a cavity 600 inside. The wedge pin 62 is fixedly connected to the cavity 600 by a spring 61. One end of the wedge pin 62 extends to the outside of the cavity 600 under the push of the spring 61 and engages in the locking slot 120. This structure allows the speed measuring device 4 to be installed simply by pushing it into the mounting kit 12 until the wedge pin 62 engages in the locking slot 120. When the speed measuring device 4 needs to be disassembled, the wedge pin 62 can be pressed to disengage it from the locking slot 120, and then the speed measuring device 4 can be removed downwards. The operation is convenient and quick.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A speed measuring device installed on the bottom of a train, characterized in that: It includes a mounting main board (1) fixed to the bottom of the train and a speed measuring instrument (4) disposed below the mounting main board (1). The mounting main board (1) has a mounting kit (12) installed at the bottom center position, and the speed measuring instrument (4) is detachably assembled in the mounting kit (12) from bottom to top. Below the mounting motherboard (1) is a protective cover (2), which covers the speed measuring instrument (4). A speed measuring port (21) is provided at the bottom center of the protective cover (2). A protective plate (22) is provided inside the speed measuring port (21). A control mechanism (5) for controlling the movement of the protective plate (22) is installed inside the protective cover (2).

2. The speed measuring device installed on the bottom of a train according to claim 1, characterized in that: The protective cover (2) adopts a trapezoidal structure. The two inclined surfaces of the protective cover (2) are located on both sides of the train's direction of travel, and multiple guide grooves (20) are provided on both inclined surfaces of the protective cover (2).

3. A speed measuring device installed on the bottom of a train according to claim 1, characterized in that... Both ends of the protective cover (2) are provided with a first bracket (23) in an H-shape. The side of the mounting motherboard (1) is provided with a first slot (10) that is adapted to the first bracket (23). The first bracket (23) is slidably inserted into the first slot (10) and fixed by bolts.

4. A speed measuring device installed on the bottom of a train according to claim 3, characterized in that: Upright plates (13) are installed on both sides of the protective cover (2) and on both sides below the mounting main board (1). Side panels (3) are snapped onto both sides of the protective cover (2), and the side panels (3) are fixedly connected to the upright plates (13) by bolts.

5. A speed measuring device installed on the bottom of a train according to claim 3, characterized in that: The inner side of the shield (2) is also provided with a second bracket (24) with an inclined structure. The side of the mounting motherboard (1) is provided with a second slot (11) adapted to the second bracket (24), so that when the second bracket (24) is inserted into the second slot (11), the second bracket (24), the shield (2) and the mounting motherboard (1) form a triangular support structure.

6. A speed measuring device installed on the bottom of a train according to claim 1, characterized in that: The lower interior of the cover (2) is provided with an inner cavity (25) for the movement of the guard plate (22), and a groove (220) is provided on one side of the guard plate (22) in the direction perpendicular to the moving direction. The control mechanism (5) includes a slider (50), an electric push rod (51), and a diagonal rod (52). The slider (50) is slidably assembled in the groove (220). One end of the diagonal rod (52) is rotatably connected to the slider (50), and the other end is rotatably connected to the corner of the inner cavity (25). One end of the electric push rod (51) is movably mounted on the diagonal rod (52), and the other side is mounted on the inner wall of the inner cavity (25), so that when the electric push rod (51) is running, it can realize the movement control of the guard plate (22) by pushing and pulling the diagonal rod (52).

7. A speed measuring device installed on the bottom of a train according to claim 1, characterized in that: The speed measuring instrument (4) has a threaded groove (40) on its side. A locking assembly (6) is screwed into the threaded groove (40) to lock and fix the speed measuring instrument (4) into the assembly (12).

8. A speed measuring device installed on the bottom of a train according to claim 7, characterized in that: The assembly (12) has locking slots (120) on both sides. The engaging assembly (6) includes a main component (60) and a wedge pin (62). The main component (60) has a cavity (600) inside. The wedge pin (62) is fixedly connected to the cavity (600) by a spring (61). One end of the wedge pin (62) extends to the outside of the cavity (600) under the push of the spring (61) and engages in the locking slot (120).

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