Turnover upper apron board structure of urban rail vehicle

Abstract

The invention discloses a turnover upper apron board structure of an urban rail vehicle, and belongs to the technical field of urban rail transit, the turnover upper apron board structure comprises a vehicle main body and an apron board rotationally mounted on the vehicle main body, and further comprises an arc-shaped plate fixedly mounted in the vehicle main body, and a sliding groove is formed in one side of the arc-shaped plate; an arc-shaped air bag is fixedly mounted in the sliding chute of the arc-shaped plate; according to the turnover upper apron board structure of the urban rail vehicle, the arc-shaped rack can be driven to enter the arc-shaped plate through rotation of the apron board, the arc-shaped rack automatically abuts against the extrusion block in the sliding process and pushes the extrusion block, so that the extrusion block automatically extrudes the arc-shaped air bag, and when the apron board and the vehicle body are about to be closed, the arc-shaped air bag can be automatically extruded. The arc-shaped air bag is extruded to be in the flattest state, air in the arc-shaped air bag is conveyed into the rectangular elastic sealing air bag through the air conveying pipe to enable the rectangular elastic sealing air bag to expand, peripheral installation gaps between the apron board and the vehicle body are tightly wrapped and sealed, and dust is effectively prevented from entering the vehicle body.

Description

Technical Field

[0001] The present invention relates to the technical field of urban rail transit, and in particular to a reversible upper skirt plate structure of an urban rail vehicle. Background Art

[0002] Urban rail vehicle skirts are enclosed panels installed on both sides of the vehicle's underbody (between the bogies or in front of and behind the bogies). They are a crucial component of the vehicle's appearance and functionality. Their design and performance directly impact the vehicle's operational safety, aerodynamic performance, sound insulation, and ease of maintenance.

[0003] After searching, the Chinese patent publication number CN112141142A discloses a reversible upper skirt panel structure for urban rail vehicles, which is characterized in that it includes a skirt panel, a locking device, and a mounting seat, wherein a plurality of locking devices are fixed on the inner side of the skirt panel along the transverse interval of the vehicle body, and the lower side of each locking device is rotatably connected to the mounting seat, the mounting seat is fixedly connected to the vehicle body, and a lock box is provided on the mounting seat, the locking device includes a collision lock, a pull handle and a locking device outer cover plate, the locking device outer cover plate is a groove-shaped structure as a whole, the collision lock is arranged in the groove structure of the locking device outer cover plate, the collision lock position cooperates with the lock position on the lock box, the upper side of the collision lock is connected to one end of the pull handle, and the pull handle is connected to the upper part of the locking device outer cover plate. When opening the skirt panel, it is only necessary to pull the pull handle, the pull handle drives the lock tongue to retract, the locking device is opened, and the skirt panel is flipped to open the upper skirt panel, which is convenient for inspection and maintenance of the roof equipment. The above patent has the following deficiencies: Since the operating environment of the vehicle is relatively complex, there are usually dust, sand and other particles around the track. The airflow generated when the vehicle is running will bring these dust into the gap between the skirt and the vehicle, and enter the equipment compartment at the bottom of the vehicle, affecting the heat dissipation and normal operation of the equipment. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that dust easily enters the gap between the skirt plate and the vehicle, which easily affects the normal use and heat dissipation of the equipment in the vehicle, and to propose a reversible skirt plate structure for urban rail vehicles.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A flippable skirt structure for an urban rail vehicle comprises a vehicle body and a skirt rotatably mounted on the vehicle body, further comprising: an arcuate plate fixedly mounted within the vehicle body, a slide groove being provided on one side of the arcuate plate, an arcuate airbag being fixedly mounted within the slide groove of the arcuate plate, a rectangular elastic sealing airbag connected to the arcuate airbag being fixedly mounted on the inner wall of the vehicle body, an extrusion block being slidably connected to the arcuate plate, an arcuate rack being fixedly connected to the skirt plate, and an air supply pipe being fixedly connected between the arcuate airbag and the rectangular elastic sealing airbag.

[0006] Preferably, two hydraulic damping rods are symmetrically connected to the side wall of the vehicle body and the skirt plate for rotation, a handle is fixedly mounted on the skirt plate, and a mounting hole adapted to the arc plate is provided in the vehicle body.

[0007] Preferably, one end of the arc plate is fixedly connected to an extension block, the extrusion block is fixedly connected to an arc guide rod, the arc guide rod passes through the extension block and is slidably connected to the extension block, and a first spring is sleeved on the arc guide rod.

[0008] Preferably, the two ends of the first spring are respectively against the extrusion block and the extension block, the arc plate is provided with a sliding hole corresponding to the extrusion block, the arc plate is provided with a limiting hole, the arc rack is provided with a sliding groove, and the sliding groove of the arc rack is slidably connected with an arc-shaped clamping block.

[0009] Preferably, a guide wheel is rotatably connected to the sliding groove of the arc-shaped rack, a pull rope is fixedly connected to the arc-shaped clamping block, one end of the pull rope passes through the skirt plate through the guide wheel, and the end of the pull rope away from the arc-shaped clamping block is fixedly connected to the pull block.

[0010] Preferably, a second spring is provided on the pull rope, and the two ends of the second spring are fixedly connected to the inner walls of the arc-shaped block and the arc-shaped rack respectively. The arc-shaped rack and the arc-shaped plate are provided in two groups, and the two groups of arc-shaped racks and arc-shaped plates are symmetrically arranged with the center line of the skirt plate as the axis of symmetry.

[0011] Preferably, a receiving groove is provided in the vehicle body, a sealing cylinder is fixedly installed in the receiving groove of the vehicle body, a piston is slidably connected in the sealing cylinder, and a push rod is fixedly connected to the piston.

[0012] Preferably, a third spring is sleeved on the push rod, and the two ends of the third spring are fixedly connected to the push rod and the sealing cylinder respectively. A rotating rod is rotatably connected in the accommodating groove of the vehicle body, and one end of the rotating rod is fixedly connected to a gear meshing with the arc-shaped rack.

[0013] Preferably, a cam abutting against the push rod is fixedly connected to the rotating rod, and an air intake pipe is fixedly connected to the sealing cylinder. One end of the air intake pipe extends to the outside of the vehicle body and is fixedly connected to the vehicle body.

[0014] Preferably, the sealing cylinder is fixedly connected to an air outlet pipe, one end of the air outlet pipe extends to the outside of the vehicle body, and the outer end of the air outlet pipe is fixedly connected to a nozzle, which faces the bottom of the skirt board.

[0015] Compared with the prior art, the present invention provides a reversible upper skirt structure for urban rail vehicles, which has the following beneficial effects: 1. The reversible skirt panel structure of the urban rail vehicle can drive the arc-shaped rack to enter the arc-shaped panel by rotating the skirt panel. During the sliding process, the arc-shaped rack automatically contacts and pushes the extrusion block, so that the extrusion block automatically squeezes the arc-shaped airbag. When the skirt panel and the vehicle body are about to close, the arc-shaped airbag is squeezed to its flattest state. The gas in the arc-shaped airbag is transported to the rectangular elastic sealing airbag through the air pipe, causing it to expand, tightly wrapping the surrounding installation gaps between the skirt panel and the vehicle body to seal it, effectively preventing dust from entering the vehicle body, and significantly improving the barrier ability against dust, rain, ice and snow, and debris around the track. The rectangular elastic sealing airbag can also reduce the rigid collision between the skirt panel and the vehicle body, reduce the wear and fatigue of metal connectors, and extend the service life. At the same time, the sealing layer formed by the rectangular elastic sealing airbag can also effectively block the mechanical noise generated by the bottom equipment from spreading to the outside.

[0016] 2. The reversible skirt panel structure of the urban rail vehicle drives the pull rope by pulling the pull block toward the outside of the skirt panel, and under the guidance of the guide wheel, pulls the arc-shaped clamping block to slide and enter the sliding groove of the arc-shaped rack. At the same time, the second spring is stretched to generate a reset elastic force. When the skirt panel and the vehicle body are rotated and closed in the same plane, the pull block is released, and the arc-shaped clamping block can enter the limiting hole of the arc panel under the action of the second spring, so that the arc-shaped clamping block and the limiting hole are tightly fitted and limited. Through two sets of symmetrical arc-shaped clamping blocks and limiting holes, the skirt panel and the vehicle body are stably installed. When the skirt panel needs to be opened, it is only necessary to pull the pull block again to drive the arc-shaped clamping block to disengage from the limiting hole, so that the skirt panel can be rotated and automatically opened with the hydraulic damping rod. The operation is simple and convenient.

[0017] 3. The reversible skirt plate structure of the urban rail vehicle drives the arc-shaped rack into the arc-shaped plate through the rotation of the skirt plate, and the arc-shaped rack is engaged with the gear. The gear automatically rotates and drives the rotating rod to rotate. The rotating rod drives the cam to rotate. When the protruding part of the cam contacts the push rod, the push rod automatically drives the piston to slide toward the inner direction of the sealing cylinder. When the protruding part of the cam is disengaged from the push rod, the push rod drives the piston to automatically reset under the action of the third spring, and the sealing cylinder repeatedly inhales air through the intake pipe and repeatedly ejects air through the exhaust pipe. At the same time, the operator only needs to drive the skirt plate to repeatedly rotate it by the handle to make it flip back and forth, thereby driving the arc-shaped rack to continuously engage with the gear and making the cam continuously rotate, so that the nozzle can repeatedly remove dust and other impurities on the inner side wall and edge of the skirt plate. After cleaning, the skirt plate can be closed without the need for traditional manual wiping and cleaning, further reducing the entry of dust and particulate impurities into the vehicle body and ensuring the stability between the skirt plate and the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a reversible upper skirt structure for urban rail vehicles proposed by the present invention; Figure 2 The present invention proposes Figure 1 Schematic diagram of the structure of part A; Figure 3 This is a side structural diagram of a reversible upper skirt structure for urban rail vehicles proposed by the present invention; Figure 4 This is a schematic front view of the structure of a reversible upper skirt plate structure for urban rail vehicles proposed by the present invention; Figure 5 This is a schematic structural diagram of the interior of the vehicle body from the right side in a reversible upper skirt structure of a city rail vehicle proposed by the present invention; Figure 6 The present invention proposes Figure 5 Schematic diagram of the structure of part B; Figure 7 The present invention proposes Figure 5 Schematic diagram of the structure of part C; Figure 8 This is a structural schematic diagram of an extrusion block, an arc-shaped rack, and an arc-shaped plate in a reversible upper skirt structure of an urban rail vehicle proposed by the present invention; Figure 9 The present invention proposes Figure 8 Schematic diagram of the structure of part D.

[0019] In the figure: 1. Vehicle body; 2. Skirt; 3. Arc plate; 4. Arc airbag; 5. Rectangular elastic sealing airbag; 6. Extrusion block; 7. Arc rack; 8. Air pipe; 9. Hydraulic damping rod; 10. Handle; 11. Extension block; 12. Arc guide rod; 13. First spring; 14. Limiting hole; 15. Arc block; 16. Guide wheel; 17. Pull rope; 18. Pull block; 19. Second spring; 20. Receiving groove; 21. Sealing cylinder; 22. Piston; 23. Push rod; 24. Third spring; 25. Rotating rod; 26. Gear; 27. Cam; 28. Intake pipe; 29. ​​Exhaust pipe; 30. Nozzle. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] Example 1: Reference Figures 1-9 A reversible skirt plate structure for an urban rail vehicle includes a vehicle body 1 and a skirt plate 2 rotatably mounted on the vehicle body 1, and further includes: a curved plate 3 fixedly mounted in the vehicle body 1, a slide groove being provided on one side of the curved plate 3, a curved airbag 4 being fixedly mounted in the slide groove of the curved plate 3, a rectangular elastic sealing airbag 5 connected to the curved airbag 4 being fixedly mounted on the inner wall of the vehicle body 1, an extrusion block 6 being slidably connected to the curved plate 3, a curved rack 7 being fixedly connected to the skirt plate 2, and an air supply pipe 8 being fixedly connected between the curved airbag 4 and the rectangular elastic sealing airbag 5.

[0023] In the present invention, when the skirt panel 2 is closed on the vehicle body 1, the arc-shaped rack 7 can be driven to enter the arc-shaped plate 3 by rotating the skirt panel 2. The arc-shaped rack 7 automatically contacts the extrusion block 6 during the sliding process and pushes it, so that the extrusion block 6 automatically squeezes the arc-shaped airbag 4. When the skirt panel 2 and the vehicle body 1 are about to be closed, the arc-shaped airbag 4 is squeezed to its flattest state. The gas in the arc-shaped airbag 4 is transported to the rectangular elastic sealing airbag 5 through the air supply pipe 8, causing it to elastically expand, tightly wrapping the surrounding installation gaps between the skirt panel 2 and the vehicle body 1 to make it sealed, effectively preventing dust from entering the interior of the vehicle body 1, and significantly improving the barrier ability against dust, rain, ice and snow, and debris around the track. The rectangular elastic sealing airbag 5 can also reduce the rigid collision between the skirt panel 2 and the vehicle body 1, reduce the wear and fatigue of metal connectors, and extend the service life. At the same time, the sealing layer formed by the rectangular elastic sealing airbag 5 can also effectively block the mechanical noise generated by the bottom equipment of the vehicle from spreading to the outside.

[0024] Example 2: Reference Figure 5-Figure 9 , which is basically the same as the first embodiment, furthermore, two hydraulic damping rods 9 are symmetrically connected to the side wall of the vehicle body 1 and the skirt panel 2 for rotation, a handle 10 is fixedly mounted on the skirt panel 2, and a mounting hole adapted to the arc-shaped plate 3 is opened in the vehicle body 1.

[0025] In the present invention, through the hydraulic damping rod 9 between the skirt panel 2 and the vehicle body 1, when the skirt panel 2 is rotated to open, the hydraulic damping rod 9 can provide a certain supporting force, so that the skirt panel 2 can be stably maintained in the open state, which is convenient for maintenance personnel to operate. When closing the skirt panel 2, the hydraulic damping rod 9 can also play a buffering role, so that the skirt panel 2 is slowly and smoothly reset, avoiding excessive impact force when closing.

[0026] One end of the arc plate 3 is fixedly connected to an extension block 11 , and an arc guide rod 12 is fixedly connected to the extrusion block 6 . The arc guide rod 12 passes through the extension block 11 and is slidably connected to the extension block 11 . A first spring 13 is sleeved on the arc guide rod 12 .

[0027] Two ends of the first spring 13 respectively abut against the extrusion block 6 and the extension block 11 , and a sliding hole corresponding to the extrusion block 6 is opened on the arc plate 3 .

[0028] In the present invention, when the arc-shaped rack 7 slides against the extrusion block 6, the extrusion block 6 is automatically guided to slide under the action of the arc-shaped guide rod 12, and at the same time, the first spring 13 is compressed. When the skirt plate 2 is flipped open, the arc-shaped rack 7 is driven to disengage from the arc plate 3, and the extrusion block 6 is automatically reset under the action of the first spring 13. At the same time, the rectangular elastic sealing airbag 5 automatically contracts under the action of elasticity, allowing the gas to return to the arc-shaped airbag 4 through the gas pipe 8.

[0029] Example 3: Reference Figure 5-Figure 9, which is basically the same as the first embodiment, and further, a limiting hole 14 is provided on the arc plate 3, a sliding groove is provided on the arc rack 7, and an arc-shaped clamping block 15 is slidably connected in the sliding groove of the arc rack 7.

[0030] A guide wheel 16 is rotatably connected to the sliding groove of the arc-shaped rack 7, and a pull rope 17 is fixedly connected to the arc-shaped clamping block 15. One end of the pull rope 17 passes through the skirt plate 2 through the guide wheel 16, and the end of the pull rope 17 away from the arc-shaped clamping block 15 is fixedly connected to the pull block 18.

[0031] A second spring 19 is sleeved on the pull rope 17, and the two ends of the second spring 19 are fixedly connected to the inner walls of the arc-shaped block 15 and the arc-shaped rack 7 respectively. There are two groups of arc-shaped racks 7 and arc-shaped plates 3, and the two groups of arc-shaped racks 7 and arc-shaped plates 3 are symmetrically arranged with the center line of the skirt plate 2 as the axis of symmetry.

[0032] In the present invention, when installing the skirt panel 2 and the vehicle body 1, the operator pulls the pull block 18 toward the outside of the skirt panel 2, driving the pull rope 17. Under the guidance of the guide wheel 16, the arc-shaped clamping block 15 slides in the slot of the arc-shaped rack 7 and enters. At the same time, the second spring 19 is compressed by the inner wall of the arc-shaped clamping block 15 and the arc-shaped rack 7 to generate a reset elastic force. When the skirt panel 2 and the vehicle body 1 are rotated and closed and are in the same plane, the pull block 18 is released, and the second Under the reset action of the spring 19, the arc-shaped clamping block 15 enters the limiting hole 14 of the arc plate 3, so that the arc-shaped clamping block 15 and the limiting hole 14 are tightly fitted and limited, and through two sets of symmetrical arc-shaped clamping blocks 15 and limiting holes 14, the skirt panel 2 and the vehicle body 1 are stably installed. When the skirt panel 2 needs to be opened, it is only necessary to pull the pull block 18 again to drive the arc-shaped clamping block 15 to disengage from the limiting hole 14, so that the skirt panel 2 can be rotated and automatically opened in conjunction with the hydraulic damping rod 9. The operation is simple and convenient.

[0033] Example 4: Reference Figure 4-Figure 9 , which is basically the same as the first embodiment, and further, a receiving groove 20 is opened in the vehicle body 1, a sealing cylinder 21 is fixedly installed in the receiving groove 20 of the vehicle body 1, a piston 22 is slidably connected in the sealing cylinder 21, and a push rod 23 is fixedly connected to the piston 22.

[0034] A third spring 24 is sleeved on the push rod 23, and the two ends of the third spring 24 are fixedly connected to the push rod 23 and the sealing cylinder 21 respectively. A rotating rod 25 is rotatably connected in the accommodating groove 20 of the vehicle body 1, and one end of the rotating rod 25 is fixedly connected to a gear 26 that meshes with the arc-shaped rack 7.

[0035] A cam 27 abutting against the push rod 23 is fixedly connected to the rotating rod 25 , and an air intake pipe 28 is fixedly connected to the sealing cylinder 21 . One end of the air intake pipe 28 extends to the outside of the vehicle body 1 and is fixedly connected to the vehicle body 1 .

[0036] The sealing cylinder 21 is fixedly connected to an air outlet pipe 29 , one end of which extends to the outside of the vehicle body 1 . The outer end of the air outlet pipe 29 is fixedly connected to a nozzle 30 , which faces the bottom of the skirt panel 2 .

[0037] In the present invention, when the skirt plate 2 is closed, the skirt plate 2 rotates and drives the arc-shaped rack 7 to enter the arc-shaped plate 3. At the same time, the arc-shaped rack 7 meshes with the gear 26, which automatically rotates the gear 26 and drives the rotating rod 25 to rotate. The rotating rod 25 drives the cam 27 to rotate. When the protruding portion of the cam 27 contacts the push rod 23, the push rod 23 automatically drives the piston 22 to slide toward the inside of the sealing cylinder 21. When the protruding portion of the cam 27 disengages from the push rod 23, the push rod 23 drives the piston 22 to automatically reset under the action of the third spring 24. This reciprocating process causes the sealing cylinder 21 to repeatedly inhale air through the intake pipe 28 and the exhaust pipe 29. Repeated spraying. At the same time, the operator only needs to use the handle 10 to drive the skirt panel 2 to repeatedly rotate and flip it back and forth, which can drive the arc rack 7 to continuously engage with the gear 26, and make the cam 27 rotate continuously, so that the nozzle 30 can repeatedly remove the dust and other impurities on the inner wall and edge of the skirt panel 2. After the cleaning is completed, the skirt panel 2 can be closed without the need for traditional manual wiping and cleaning, further reducing the dust and particulate impurities from entering the vehicle body 1, and ensuring the stability between the skirt panel 2 and the vehicle body 1; It should be noted that both the intake pipe 28 and the outlet pipe 29 are equipped with a one-way valve, and a filter is installed in the intake pipe 28.

[0038] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A reversible upper skirt structure for an urban rail vehicle, comprising a vehicle body (1) and a skirt (2) rotatably mounted on the vehicle body (1), characterized in that: Also includes: A curved plate (3) is fixedly mounted in the vehicle body (1), a slide groove is provided on one side of the curved plate (3), a curved airbag (4) is fixedly mounted in the slide groove of the curved plate (3), a rectangular elastic sealing airbag (5) connected to the curved airbag (4) is fixedly mounted on the inner wall of the vehicle body (1), an extrusion block (6) is slidably connected to the curved plate (3), an arc-shaped rack (7) is fixedly connected to the skirt plate (2), and an air delivery pipe (8) is fixedly connected between the curved airbag (4) and the rectangular elastic sealing airbag (5).

2. The reversible upper skirt plate structure of an urban rail vehicle according to claim 1, characterized in that: Two hydraulic damping rods (9) are symmetrically connected to the side wall of the vehicle body (1) and the skirt plate (2). A handle (10) is fixedly mounted on the skirt plate (2). A mounting hole adapted to the arc plate (3) is provided in the vehicle body (1).

3. The reversible upper skirt plate structure of an urban rail vehicle according to claim 1, characterized in that: One end of the arc plate (3) is fixedly connected to an extension block (11), and an arc guide rod (12) is fixedly connected to the extrusion block (6). The arc guide rod (12) passes through the extension block (11) and is slidably connected to the extension block (11). A first spring (13) is sleeved on the arc guide rod (12).

4. The reversible upper skirt structure of an urban rail vehicle according to claim 3, characterized in that: The two ends of the first spring (13) are respectively against the extrusion block (6) and the extension block (11); a sliding hole corresponding to the extrusion block (6) is provided on the arc plate (3); a limiting hole (14) is provided on the arc plate (3); a sliding groove is provided on the arc rack (7); and an arc clamping block (15) is slidably connected in the sliding groove of the arc rack (7).

5. The reversible upper skirt structure of an urban rail vehicle according to claim 4, characterized in that: A guide wheel (16) is rotatably connected to the sliding groove of the arc-shaped rack (7), a draw rope (17) is fixedly connected to the arc-shaped clamping block (15), one end of the draw rope (17) passes through the skirt plate (2) via the guide wheel (16), and the end of the draw rope (17) away from the arc-shaped clamping block (15) is fixedly connected to the draw block (18).

6. The reversible upper skirt structure of an urban rail vehicle according to claim 5, characterized in that: A second spring (19) is sleeved on the pull rope (17), and the two ends of the second spring (19) are fixedly connected to the inner wall of the arc-shaped block (15) and the arc-shaped rack (7), respectively. The arc-shaped rack (7) and the arc-shaped plate (3) are each provided with two groups, and the two groups of arc-shaped racks (7) and the arc-shaped plates (3) are symmetrically arranged with the center line of the skirt plate (2) as the symmetry axis.

7. The reversible upper skirt plate structure of an urban rail vehicle according to claim 1, characterized in that: A receiving groove (20) is provided in the vehicle body (1), a sealing cylinder (21) is fixedly installed in the receiving groove (20) of the vehicle body (1), a piston (22) is slidably connected in the sealing cylinder (21), and a push rod (23) is fixedly connected to the piston (22).

8. The reversible upper skirt structure of an urban rail vehicle according to claim 7, characterized in that: A third spring (24) is sleeved on the push rod (23), and the two ends of the third spring (24) are fixedly connected to the push rod (23) and the sealing cylinder (21), respectively. A rotating rod (25) is rotatably connected in the receiving groove (20) of the vehicle body (1), and one end of the rotating rod (25) is fixedly connected to a gear (26) that meshes with the arc-shaped rack (7).

9. The reversible upper skirt structure of an urban rail vehicle according to claim 8, characterized in that: The rotating rod (25) is fixedly connected to a cam (27) that abuts against the push rod (23), and the sealing cylinder (21) is fixedly connected to an air intake pipe (28). One end of the air intake pipe (28) extends to the outside of the vehicle body (1) and is fixedly connected to the vehicle body (1).

10. The reversible upper skirt plate structure of a city rail vehicle according to claim 9, characterized in that: The sealing cylinder (21) is fixedly connected to an air outlet pipe (29), one end of which extends to the outside of the vehicle body (1), and the outer end of the air outlet pipe (29) is fixedly connected to a nozzle (30), which faces the bottom of the skirt plate (2).

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