Rail transit moving train roof monitor shock-absorbing support

Abstract

The utility model discloses a rail transit motion train roof monitor shock mount, including bottom plate and mounting panel, and mounting panel is located the top of bottom plate, and bottom plate and mounting panel are hinged through first connecting rod and second connecting rod, and first connecting rod and second connecting rod are parallel to each other, be provided with adjusting assembly on the top surface of bottom plate, be provided with buffer assembly on adjusting assembly, and buffer assembly is hinged with mounting panel, still be provided with rotating assembly on the top of mounting panel. The bottom plate is hinged with the mounting panel through the first connecting rod and the second connecting rod that are parallel to each other, form parallelogram hinge structure, this structure can guarantee that mounting panel always keeps horizontal state in the up and down movement process, avoids the monitor to influence monitoring angle because of the inclination, and the cooperation of adjusting assembly and buffer assembly can adjust the height of mounting panel, can quickly absorb and buffer the energy produced when vibrating, reduces the vibration impact, and the rotating assembly on the top of mounting panel is convenient for adjusting the direction of monitor, and the use flexibility is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit vehicle monitoring technology, and in particular relates to a shock-absorbing bracket for a roof-mounted monitor of a rail transit train. Background Technology

[0002] In the field of intelligent monitoring of rail transit, high-speed cameras, as dynamic and precise monitoring devices, can be deployed on the roof of moving trains for real-time detection and location of fires on roof equipment, accurate identification of foreign objects encroaching on the tracks, and dynamic analysis of pantograph-catenary relationships. These monitors need to operate continuously and stably under the complex conditions of high-speed train operation. Their mounting brackets must simultaneously meet the requirements of seismic resistance and vibration reduction, controllable rotation, and stable operation, while their height must not exceed safety limits.

[0003] Traditional monitor brackets have several shortcomings when used for installing monitors on the roof of moving trains. For example, they lack shock absorption devices, which not only directly affects the image quality of high-speed cameras, preventing them from accurately capturing target objects, but may also damage internal components, affecting their normal operation and reducing the reliability of monitoring key equipment on the roof. They also lack effective rotation capabilities, limiting the monitor's field of view and making it difficult to detect potential safety hazards in a timely manner. Furthermore, some brackets have unreasonable height designs: too high increases train drag and poses a collision risk if safety limits are exceeded, threatening train safety; too low may not provide sufficient installation space and a stable support angle for the high-speed camera, affecting monitoring effectiveness. Finally, insufficient base stability can cause the high-speed camera to shake or tilt during train operation, making it unable to maintain a stable monitoring posture, resulting in distorted monitoring data and an inaccurate reflection of the actual condition of key equipment on the roof.

[0004] Therefore, we need to design a shock-absorbing bracket for the roof-mounted monitoring device of a rail transit moving train to solve the above problems. Utility Model Content

[0005] The problem to be solved by this utility model is to provide a shock-absorbing bracket for a roof-mounted monitoring device for rail transit sports trains.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A shock-absorbing bracket for a roof-mounted monitor of a rail transit moving train includes a base plate and a mounting plate. The mounting plate is located above the base plate. The base plate and the mounting plate are hinged together by a first link and a second link, which are parallel to each other. An adjustment component is provided on the top surface of the base plate, and a buffer component is provided on the adjustment component. The buffer component is hinged to the mounting plate. A rotation component is also provided on the top of the mounting plate.

[0007] Preferably, the adjustment assembly includes a front support plate and a rear support plate. A positioning device is provided on the front support plate. A screw is provided between the front support plate and the rear support plate. One end of the screw is rotatably connected to the rear support plate, and the other end is connected to the positioning device. An adjustment block is matched to the screw, and the buffer assembly is hinged to the adjustment block.

[0008] This configuration provides a stable support base for the screw rod with the front and rear support plates, ensuring that the screw rod will not deviate during rotation and guaranteeing structural stability. The matching configuration of the screw rod and the adjusting block allows the adjusting block to move along the screw rod axis by rotating the screw rod, thereby changing the support height of the buffer assembly on the mounting plate and realizing the adjustment of the monitor's installation height. The positioning device can effectively fix the position of the screw rod, preventing it from rotating on its own during vehicle vibration, avoiding adjustment failure, and ensuring the stability of the shock absorption effect.

[0009] Preferably, the positioning device includes a positioning hole formed on the front support plate, a rotating cap disposed in the positioning hole, a limiting block fixedly disposed on the inner wall of the rotating cap, a spring piece disposed inside the rotating cap, the spring piece being arranged radially along the rotating cap, and the diameter of the spring piece being larger than the inner diameter of the rotating cap, both ends of the spring piece being fixedly connected to the inner wall of the rotating cap respectively, a connecting post being fixedly disposed in the middle of the spring piece, a rotating shaft being connected to the free end of the connecting post, the free end of the rotating shaft being fixedly connected to the screw, a limiting groove being formed axially on the side wall of the rotating shaft, the limiting block being located in the limiting groove, two positioning rings being fitted on the outside of the rotating shaft, one being fixedly connected to the rotating cap and the other being fixedly connected to the positioning hole, and positioning teeth being formed on the opposite surfaces of the two positioning rings.

[0010] With this design, the spring piece, because its diameter is larger than the inner diameter of the screw cap and both ends are fixed, will form an arc shape inside the screw cap. When a pushing force is applied to its middle, the direction of the arc shape will change. Therefore, the position of the screw cap can be fixed by the spring piece, which forms an arc shape under force. This allows the positioning ring on the screw cap to mesh or separate from the positioning teeth on the positioning ring in the positioning hole. In the separated state, rotating the screw cap will drive the rotating shaft to rotate through the cooperation of the limiting groove and the limiting block, thereby driving the screw to rotate and adjusting the position of the adjusting block. When the positioning teeth on the two positioning rings mesh with each other, the screw cap can be accurately positioned, preventing it from rotating on its own during vibration and ensuring the stability of the screw position. When the screw cap moves, the positioning teeth on the two positioning rings will separate, allowing for flexible adjustment and reliable switching between adjustment and positioning.

[0011] Preferably, the buffer assembly includes a support rod, an upper retaining ring is fitted on the outer side of the support rod, a telescopic hole is formed along the axial direction on the end face of the support rod, a telescopic rod is inserted into the telescopic hole, one end of the telescopic rod is located outside the telescopic hole, and a lower retaining ring is fitted on the outer side of the telescopic hole. A spring is fitted on the telescopic rod and the support rod between the lower retaining ring and the upper retaining ring, one end of the spring is connected to the upper retaining ring, and the other end is connected to the lower retaining ring.

[0012] With this design, the telescopic rod can freely extend and retract along the axial direction of the telescopic hole. Combined with the elastic deformation of the spring, it can quickly absorb and buffer the energy generated during vibration, significantly reducing the impact of vibration on the monitor and protecting the equipment. The upper and lower retaining rings limit the ends of the spring, effectively preventing the spring from detaching from the support rod and telescopic rod during extension and retraction, ensuring the stable operation of the buffer assembly. The overall structure is simple and compact, with a fast response speed, and can promptly respond to vibrations of different frequencies and intensities, improving the timeliness and reliability of the shock absorption effect.

[0013] Preferably, the rotating assembly includes a rotating seat fixed to the top surface of the mounting plate, a rotating disk rotatably mounted on the rotating seat, and a plurality of mounting slots formed on the top of the rotating disk.

[0014] With this configuration, the rotating disk can rotate freely relative to the rotating base, making it easy to flexibly adjust the horizontal angle of the monitor according to actual monitoring needs and effectively expand the monitoring coverage. The several mounting slots on the top of the rotating disk can accommodate monitors of different specifications and types, improving the versatility of the bracket. At the same time, the mounting slots can position the monitor to prevent it from shifting due to vibration after installation, ensuring the stability of the monitor installation.

[0015] Preferably, an upper connecting seat is fixedly provided on the bottom surface of the mounting plate, and a lower connecting seat is fixedly provided on the top surface of the base plate. The two ends of the first connecting rod and the second connecting rod are respectively hinged to the upper connecting seat and the lower connecting seat.

[0016] This configuration provides a solid connection point for the hinge of the first and second connecting rods to the mounting plate and the base plate, enhancing the overall strength of the hinge structure and preventing loosening when the connecting rods are directly connected to the plate. The hinge connection through the connecting seat reduces direct friction between the connecting rods and the mounting plate and the base plate, reducing component wear and extending service life. At the same time, it makes the rotation of the connecting rods smoother and more flexible, ensuring the stable operation of the parallelogram structure.

[0017] Preferably, a connecting frame is fixedly provided on the top surface of the adjusting block, the telescopic rod is hinged to the adjusting block through the connecting frame, a fixing seat is fixedly provided on the bottom surface of the mounting plate, and the support rod is hinged to the mounting plate through the fixing seat.

[0018] This design provides a reasonable connection angle and structural support for the hinge between the telescopic rod and the adjusting block, ensuring that the adjusting block can smoothly drive the telescopic rod to move synchronously during movement and avoid jamming. The fixed seat makes the hinge between the support rod and the mounting plate more stable, preventing the support rod from shaking or deforming under force, ensuring that the force transmission of the buffer component is stable and reliable during operation, and further improving the overall structural stability and shock absorption effect.

[0019] Preferably, the side wall of the rotating disk is provided with a plurality of slots, which are evenly distributed along the circumference of the rotating disk. A fastening bolt is provided on the side wall of the rotating seat, which is connected to the rotating seat by a threaded engagement, and one end of the fastening bolt passes through the rotating seat and is inserted into the slot.

[0020] This design ensures that the fastening bolts and the slots can firmly fix the rotating disk after it is adjusted to the appropriate angle, effectively preventing the rotating disk from rotating on its own during vehicle vibration, ensuring the stability of the monitor angle and the accuracy of the monitoring image; the threaded engagement between the fastening bolts and the rotating seat is simple and convenient to operate, facilitating the quick locking and unlocking of the rotating disk, and improving the efficiency and convenience of angle adjustment.

[0021] The advantages and positive effects of this utility model are: This invention hinges the base plate and the mounting plate together via parallel first and second connecting rods, forming a parallelogram hinge structure. This structure ensures that the mounting plate remains horizontal during vertical movement, preventing the monitor from tilting and affecting the monitoring angle. The combination of the adjustment component and the buffer component allows for height adjustment of the mounting plate, while also quickly absorbing and buffering the energy generated during vibration, reducing shock and protecting the monitor. The rotating component at the top of the mounting plate facilitates adjustment of the monitor's monitoring direction, enhancing its flexibility. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the lifting structure of this utility model; Figure 2 This is a schematic diagram of the reduced structure of this utility model; Figure 3 This is a schematic diagram of the connection structure between the buffer assembly, the mounting plate, and the adjustment assembly of this utility model; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This is a schematic diagram of the positioning ring and positioning teeth structure of this utility model; Figure 6 yes Figure 4 The diagram shown at point A illustrates the spring clip structure when the positioning teeth on the two positioning rings separate. Figure 7 yes Figure 4 The diagram shown at point A illustrates the spring structure when the positioning teeth on the two positioning rings are engaged.

[0024] The annotations in the attached figures are explained as follows: 1. Base plate; 2. Lower connecting seat; 3. Front support plate; 4. Rear support plate; 5. Adjusting block; 6. Screw; 7. Connecting frame; 8. Mounting plate; 9. Upper connecting seat; 10. First connecting rod; 11. Second connecting rod; 12. Rotating seat; 13. Rotating disk; 14. Mounting groove; 15. Slot; 16. Lower retaining ring; 17. Telescopic rod; 18. Rotary cap; 19. Fastening bolt; 20. Upper retaining ring; 21. Support rod; 22. Spring; 23. Fixed seat; 24. Telescopic hole; 25. Spring piece; 26. Connecting column; 27. Positioning hole; 28. Positioning ring; 29. ​​Limiting block; 30. Limiting groove; 31. Rotating shaft; 32. Positioning tooth. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[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] The present invention will be further described below with reference to the accompanying drawings: Example 1: As Figures 1-7 As shown, a vibration damping bracket for a roof-mounted monitor of a rail transit train includes a base plate 1 and a mounting plate 8. The mounting plate 8 is located above the base plate 1. The base plate 1 and the mounting plate 8 are hinged together by a first connecting rod 10 and a second connecting rod 11, which are parallel to each other. The base plate 1 and the mounting plate 8 form a parallelogram mechanism that can move up and down relative to each other through this parallel hinge structure. When the mounting plate 8 is displaced, the first connecting rod 10 and the second connecting rod 11 rotate synchronously around the hinge point to ensure that the mounting plate 8 always maintains a horizontal posture. An adjustment component is provided on the top surface of the base plate 1, and a buffer component is provided on the adjustment component. The buffer component is hinged to the mounting plate 8. Vibration is transmitted to the mounting plate 8 through the hinged buffer component. After the buffer component absorbs the vibration energy, it can reduce the interference of vibration. The adjustment component can use the support of the buffer component to adjust the height of the mounting plate 8. A rotating component is also provided on the top of the mounting plate 8. The rotating component realizes multi-angle adjustment of the monitor based on the horizontal posture of the mounting plate 8.

[0028] The adjustment assembly includes a front support plate 3 and a rear support plate 4. The front support plate 3 and the rear support plate 4 are fixed parallel to each other on the top surface of the base plate 1, forming a support frame for the adjustment structure. A positioning device is provided on the front support plate 3. A screw 6 is provided between the front support plate 3 and the rear support plate 4. One end of the screw 6 is rotatably connected to the rear support plate 4, and the other end is connected to the positioning device. The positioning device provides rotational driving force and positioning constraint for the screw 6. An adjustment block 5 is matched with the screw 6. The adjustment block 5 and the screw 6 form a helical transmission pair through threads. When the screw 6 rotates, the adjustment block 5 moves axially along the screw 6. The buffer assembly is hinged to the adjustment block 5. The axial displacement of the adjustment block 5 changes the relative position of the buffer assembly, thereby adjusting the height of the mounting plate 8 by adjusting the tilt angle of the buffer assembly.

[0029] The positioning device includes a positioning hole 27 on the front support plate 3, a rotating cap 18 is provided in the positioning hole 27, and the rotating cap 18 can rotate within the positioning hole 27; a spring piece 25 is provided inside the rotating cap 18, the spring piece 25 is arranged radially along the rotating cap 18, and the diameter of the spring piece 25 is larger than the inner diameter of the rotating cap 18. Both ends of the spring piece 25 are fixedly connected to the inner wall of the rotating cap 18, and the middle part of the spring piece 25 will arch to one side. A connecting post 26 is fixedly provided in the middle part of the spring piece 25, and a rotating shaft 31 is connected to the free end of the connecting post 26. The free end of the rotating shaft 31 is fixedly connected to the screw 6. A limit block 29 is fixedly provided on the inner wall of the rotating cap 18. The limit block 29 is located in the limit groove 30 and slides with it. When the cap 18 moves axially along the positioning hole 27, it causes the spring piece 25 to undergo elastic deformation synchronously. Under the push or pull of the connecting column 26, the direction of the arching of the spring piece 25 will change, thereby fixing the depth of the cap 18 inserted into the positioning hole 27. This allows the positioning teeth 32 on the two positioning rings 28 fitted on the outside of the rotating shaft 31 to separate or engage. When the positioning teeth 32 on the two positioning rings 28 separate, rotating the cap 18 can drive the rotating shaft 31 to rotate under the cooperation of the limiting block 29 and the limiting groove 30, thereby driving the screw 6 to rotate. When the positioning teeth 32 on the two positioning rings 28 engage, the cap 18 and the positioning hole 27 can be relatively fixed, thereby restricting the rotation of the screw 6.

[0030] The buffer assembly includes a support rod 21, with an upper retaining ring 20 fitted on the outer side of the support rod 21. A telescopic hole 24 is axially formed on the end face of the support rod 21, into which a telescopic rod 17 is inserted. The telescopic rod 17 can slide axially along the telescopic hole 24, enabling relative extension and retraction between the support rod 21 and the telescopic rod 17. One end of the telescopic rod 17 is located outside the telescopic hole 24, and a lower retaining ring 16 is fitted on the outer side of the telescopic hole 24. A spring 22 is fitted on the telescopic rod 17 and the support rod 21 between the lower retaining ring 16 and the upper retaining ring 20. One end of the spring 22 is connected to the upper retaining ring 20, and the other end is connected to the lower retaining ring 16. When the support rod 21 and the telescopic rod 17 extend and retract relative to each other, the distance between the upper retaining ring 20 and the lower retaining ring 16 changes, driving the spring 22 to undergo elastic deformation. The elastic force of the spring 22 reacts through the upper retaining ring 20 and the lower retaining ring 16 to the support rod 21 and the telescopic rod 17, forming a buffer force and absorbing the energy generated by vibration.

[0031] The rotating assembly includes a rotating base 12 fixed to the top surface of the mounting plate 8, the rotating base 12 being rigidly connected to the mounting plate 8; a rotating disk 13 is rotatably mounted on the rotating base 12, the rotating disk 13 being able to rotate around the central axis of the rotating base 12, and its rotation trajectory being determined based on the horizontal attitude of the mounting plate 8; a plurality of mounting slots 14 are provided on the top of the rotating disk 13, the mounting slots 14 being used to fix the monitor, and the monitor adjusting the monitoring direction as the rotating disk 13 rotates; in this embodiment, the plurality of mounting slots 14 on the rotating disk 13 radiate outwards from the central axis, and the plurality of mounting slots 14 are evenly distributed around the circumference of the rotating disk 13, which can accommodate the installation of monitors of different sizes.

[0032] An upper connecting seat 9 is fixedly installed on the bottom surface of the mounting plate 8, and a lower connecting seat 2 is fixedly installed on the top surface of the base plate 1. The upper and lower connecting seats 2 can provide stable support. The two ends of the first connecting rod 10 and the second connecting rod 11 are hinged to the upper connecting seat 9 and the lower connecting seat 2 respectively. The upper connecting seat 9 constrains the top ends of the first connecting rod 10 and the second connecting rod 11 to the preset position of the mounting plate 8, and the lower connecting seat 2 constrains the bottom ends of the first connecting rod 10 and the second connecting rod 11 to the preset position of the base plate 1. By limiting the position of the upper and lower connecting seats 2, it is ensured that the first connecting rod 10 and the second connecting rod 11 always remain parallel, thereby ensuring the horizontal posture of the mounting plate 8.

[0033] A connecting frame 7 is fixedly installed on the top surface of the adjusting block 5. The telescopic rod 17 is hinged to the adjusting block 5 through the connecting frame 7. The connecting frame 7 converts the axial displacement of the adjusting block 5 into the angle change of the telescopic rod 17. A fixing seat 23 is fixedly installed on the bottom surface of the mounting plate 8. The support rod 21 is hinged to the mounting plate 8 through the fixing seat 23. The fixing seat 23 binds the top end of the support rod 21 to the mounting plate 8. When the adjusting block 5 moves along the screw 6, the connecting frame 7 drives the end of the telescopic rod 17 to move, causing the angle between the axis of the support rod 21 and the telescopic rod 17 and the base plate 1 to change, thereby changing the height of the mounting plate 8.

[0034] The rotating disk 13 has slots 15 on its side wall, which are spaced apart around the circumference of the rotating disk 13. The rotating seat 12 has fastening bolts 19 on its side wall, which are connected to the rotating seat 12 by threaded engagement. One end of the fastening bolts 19 passes through the rotating seat 12 and is inserted into the slots 15. When the rotating disk 13 rotates to the target angle, the fastening bolts 19 are tightened so that their ends are embedded in the slots 15. The rotation of the rotating disk 13 is restricted by the mechanical engagement between the bolts and the slots 15, thereby achieving relative fixation between the rotating disk 13 and the rotating seat 12.

[0035] The working process of this embodiment is as follows: First, the base plate 1 needs to be fixed to the roof. Then, the monitor is installed through the mounting slot 14 on the rotating plate 13. Next, the height of the mounting plate 8 is adjusted by the screw 6. When adjusting, the rotating cap 18 is pulled outward. When the rotating cap 18 moves, the direction of the arching of the spring piece 25 changes, which can keep the rotating cap 18 in the adjusted position. At this time, the positioning ring 28 on the rotating cap 18 will separate from the limiting teeth on the positioning ring 28 in the positioning hole 27. Then, the rotating cap 18 is rotated, and the limiting block 29 and the limiting groove 30 are used to move the device. The rotating shaft 31 is driven to rotate, which in turn drives the screw 6 to rotate. After the screw 6 rotates, it will drive the adjusting block 5 to move through the thread engagement. After the adjusting block 5 moves, it will drive the end of the telescopic rod 17 to move through the connecting bracket 7. After the end of the telescopic rod 17 moves, since the length of the spring 22 remains unchanged in its natural state, the angle of the support rod 21 will change, thereby realizing the adjustment of the height of the mounting plate 8. This avoids the monitoring device being blocked by other components on the roof due to the installation position being too low, and also avoids damage caused by excessive installation.

[0036] After adjusting the height, rotate the rotating disk 13 to adjust the angle of the monitor. Once the angle is adjusted to the required range, screw the fastening bolt 19 into the nearest slot 15 to fix the position of the rotating disk 13 and prevent it from rotating due to vibration.

[0037] When the vehicle vibrates, the energy generated by the vibration is transmitted from the base plate 1 to the mounting plate 8. When the vibration passes through the shock absorption assembly, the spring 22 will begin to contract and extend after being impacted by external energy. During this process, the telescopic rod 17 will also insert and withdraw to absorb the vibration energy and achieve shock absorption.

[0038] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A shock-absorbing bracket for a roof-mounted monitor on a rail transit train, characterized in that: The device includes a base plate (1) and a mounting plate (8), the mounting plate (8) being located above the base plate (1). The base plate (1) and the mounting plate (8) are hinged together by a first connecting rod (10) and a second connecting rod (11), and the first connecting rod (10) and the second connecting rod (11) are parallel to each other. An adjustment assembly is provided on the top surface of the base plate (1), and a buffer assembly is provided on the adjustment assembly. The buffer assembly is hinged to the mounting plate (8). A rotating assembly is also provided on the top of the mounting plate (8).

2. The shock-absorbing bracket for a roof-mounted monitoring device of a rail transit moving train according to claim 1, characterized in that: The adjustment assembly includes a front support plate (3) and a rear support plate (4). A positioning device is provided on the front support plate (3). A screw (6) is provided between the front support plate (3) and the rear support plate (4). One end of the screw (6) is rotatably connected to the rear support plate (4), and the other end is connected to the positioning device. An adjustment block (5) is matched on the screw (6). The buffer assembly is hinged to the adjustment block (5).

3. The shock-absorbing bracket for a roof-mounted monitor of a rail transit moving train according to claim 2, characterized in that: The positioning device includes a positioning hole (27) opened on the front support plate (3), a rotating cap (18) is provided in the positioning hole (27), a limit block (29) is fixedly provided on the inner wall of the rotating cap (18), a spring piece (25) is also provided in the rotating cap (18), the spring piece (25) is arranged radially along the rotating cap (18), and the diameter of the spring piece (25) is larger than the inner diameter of the rotating cap (18). The two ends of the spring piece (25) are respectively fixedly connected to the inner wall of the rotating cap (18), and a connecting rod is fixedly provided in the middle of the spring piece (25). The column (26) is connected to a rotating shaft (31) at its free end. The free end of the rotating shaft (31) is fixedly connected to the screw (6). A limiting groove (30) is also provided on the side wall of the rotating shaft (31) along the axial direction. The limiting block (29) is located in the limiting groove (30). Two positioning rings (28) are fitted on the outside of the rotating shaft (31). One is fixedly connected to the rotating cap (18), and the other is fixedly connected to the positioning hole (27). Positioning teeth (32) are also provided on the opposite surfaces of the two positioning rings (28).

4. The shock-absorbing bracket for a roof-mounted monitor of a rail transit train according to claim 2, characterized in that: The buffer assembly includes a support rod (21), an upper retaining ring (20) is fitted on the outer side of the support rod (21), a telescopic hole (24) is provided on the end face of the support rod (21) along the axial direction, a telescopic rod (17) is inserted into the telescopic hole (24), one end of the telescopic rod (17) is located outside the telescopic hole (24), and a lower retaining ring (16) is fitted on the outer side of the telescopic hole (24). A spring (22) is fitted on the telescopic rod (17) and the support rod (21) between the lower retaining ring (16) and the upper retaining ring (20), one end of the spring (22) is connected to the upper retaining ring (20), and the other end is connected to the lower retaining ring (16).

5. The shock-absorbing bracket for a roof-mounted monitoring device of a rail transit moving train according to claim 1, characterized in that: The rotating assembly includes a rotating seat (12) fixed on the top surface of the mounting plate (8), and a rotating disk (13) is rotatably mounted on the rotating seat (12). The top of the rotating disk (13) is provided with several mounting slots (14).

6. The shock-absorbing bracket for a roof-mounted monitor of a rail transit moving train according to claim 1, characterized in that: An upper connecting seat (9) is fixedly provided on the bottom surface of the mounting plate (8), and a lower connecting seat (2) is fixedly provided on the top surface of the base plate (1). The two ends of the first connecting rod (10) and the second connecting rod (11) are respectively hinged to the upper connecting seat (9) and the lower connecting seat (2).

7. A shock-absorbing bracket for a roof-mounted monitor of a rail transit moving train according to claim 4, characterized in that: A connecting frame (7) is fixedly installed on the top surface of the adjusting block (5), and the telescopic rod (17) is hinged to the adjusting block (5) through the connecting frame (7). A fixing seat (23) is fixedly installed on the bottom surface of the mounting plate (8), and the support rod (21) is hinged to the mounting plate (8) through the fixing seat (23).

8. A shock-absorbing bracket for a roof-mounted monitoring device of a rail transit moving train according to claim 5, characterized in that: The rotating disk (13) has several slots (15) on its side wall. The slots (15) are evenly distributed around the circumference of the rotating disk (13). A fastening bolt (19) is provided on the side wall of the rotating seat (12). The fastening bolt (19) is connected to the rotating seat (12) by a threaded connection, and one end of the bolt passes through the rotating seat (12) and is inserted into the slot (15).

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