Hinge structure for apron board

Abstract

The invention belongs to the technical field of railway vehicles, and discloses a hinge structure for an apron board, which comprises a mounting frame and a mounting seat, the mounting frame is connected with an upper connecting frame, the mounting seat is connected with a lower connecting frame, and the connecting frame is hinged with a middle shaft; the top end of the supporting assembly is hinged to the bottom face of the mounting frame, the supporting assembly comprises a cylinder, a piston is slidably connected into the cylinder, the bottom end of the piston is connected with a piston rod, and the piston rod extends out of the cylinder and is connected with a hinge sleeve. A mounting hole is formed in the top end of the piston; a spring is connected between the mounting hole and the cylinder body; a plurality of through vent holes are formed in the piston, the top face of the piston is fixedly connected with a top check ring, the bottom face of the piston is fixedly connected with a bottom check ring, the top check ring and the bottom check ring are fixedly connected with a plurality of elastic pieces, and the elastic pieces are fixedly connected with blocking pieces. The top end or the bottom end of the vent hole is blocked by the blocking piece, and only one end of the vent hole is blocked. The number of the blocking pieces of the top check ring is smaller than that of the blocking pieces of the bottom check ring. The method has the technical effects that the maintenance operation convenience and the operation and maintenance efficiency are improved, and safety accidents are reduced.

Description

Technical Field

[0001] This invention belongs to the field of rail vehicle technology, and specifically relates to a hinge structure for a skirt panel. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In rail transit vehicles and other equipment, skirt structures are usually installed in the equipment compartment or the bogie area on both sides of the car body. Their core function is to protect the equipment and bogies under the car from external environmental interference, while also effectively reducing air resistance during vehicle operation and improving the overall aesthetics of the car body.

[0004] Traditional skirt structures employ a fully enclosed large skirt structure, which, while providing ample protection for the bogies, significantly reducing rolling resistance, and offering a clean appearance, severely restricts the operating space for personnel inspecting and maintaining the equipment compartment or bogies due to its strong enclosure, impacting maintenance efficiency. To address this insufficient maintenance space, a common solution in existing technology is to install an integral outward-folding inspection door on the skirt. This door is connected to the skirt body via hinges or flaps, allowing for the expansion of maintenance space by opening the door. However, due to structural limitations such as the small gap between the skirt and the car body and the limited space for hinge installation, these inspection doors typically only fold outwards by about 90°, still insufficient to meet the space requirements for efficient maintenance operations.

[0005] To solve the above-mentioned technical problems, the prior art discloses a lightweight self-locking large-angle opening and closing cover structure. It adopts a linkage-type hinge structure to improve the rotation mode of the ordinary fixed single-axis hinge to a multi-axis variable trajectory motion mode, which changes the original single-direction motion law, increases the degree of freedom of the moving parts, and realizes diverse motion trajectories at different points on the connecting joint. While achieving the maximum turning angle, it effectively avoids interference between the cover and the vehicle body during rotation.

[0006] However, the above solution still has the following drawbacks: after the cover is opened, it cannot be kept open by itself. It requires the staff to hold the cover while operating the limit buckle between the support rod and the cover, and then insert the free end of the support rod into the process hole of the vehicle body lock seat to achieve support. The operation process is cumbersome and inconvenient, which seriously affects the efficiency and safety of maintenance work. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a hinge structure for a skirt panel that can solve the technical problems existing in the prior art, such as the inability of the cover panel to remain in the open state after it is opened, resulting in cumbersome operation procedures and poor convenience.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A hinge structure for a skirt panel is provided, including a mounting frame and a mounting base. The first side of the mounting frame is fixedly connected to a fixed skirt panel, and the first side of the mounting base is fixedly connected to a movable skirt panel. The bottom surface of the mounting frame is connected to an upper connecting frame, and the top surface of the mounting base is connected to a lower connecting frame. The upper connecting frame and the lower connecting frame are hinged to a central axis and are symmetrical about the central axis. The top of the support assembly is hinged to the bottom surface of the mounting bracket. The support assembly includes a cylinder body, a piston is slidably connected inside the cylinder body, a piston rod is fixedly connected to the bottom end of the piston, the bottom end of the piston rod extends out of the cylinder body and is fixedly connected to the hinge sleeve, and the central shaft is sleeved inside the hinge sleeve. A mounting hole is opened at the top of the piston, and a spring is fixedly connected inside the mounting hole. The top of the spring is fixedly connected to the top of the inner wall of the cylinder. Multiple through-holes parallel to the piston are opened on the piston. A top retaining ring is fixedly connected to the top surface of the piston, and a bottom retaining ring is fixedly connected to the bottom surface of the piston. Multiple spring pieces are fixedly connected to both the top and bottom retaining rings, and each spring piece is fixedly connected to a baffle plate. The baffle plate blocks the top or bottom of the vent hole, and the vent hole is blocked only at one end. The number of baffles on the top baffle ring is less than the number of baffles on the bottom baffle ring.

[0009] Preferably, the connecting frame includes a mounting plate, on which a long cantilever and a short cantilever are fixedly connected. The short cantilever is located on the second side of the long cantilever. The bottom end of the long cantilever is hinged to the first end of the first connecting rod, and the middle part of the first connecting rod is hinged to the central axis. The bottom end of the short cantilever is hinged to the first end of the second connecting rod, and the second end of the second connecting rod of the upper connecting frame is hinged to the second end of the first connecting rod of the lower connecting frame.

[0010] Preferably, the short cantilever and the long cantilever are arranged on the mounting plate along the axial direction of the vehicle body, and the first link of the lower connecting frame and the upper connecting frame are sleeved on the central shaft along the axial direction of the vehicle body, and the hinge sleeve is connected to the end of the central shaft away from the first link of the upper connecting frame.

[0011] Preferably, the support assembly includes a mounting plate, the bottom end of which is hinged to the outer wall of the top of the cylinder block. Along the vehicle body axis, the mounting plate is installed on the side of the short cantilever of the upper connecting frame away from the long cantilever.

[0012] Preferably, the bottom end of the fixed skirt board is provided with a clearance groove, and the top end of the movable skirt board is accommodated in the clearance groove.

[0013] Preferably, a groove is formed on the top surface of the piston, the groove is coaxially arranged with the piston, piston rod and mounting hole, the top retaining ring is fixedly installed in the groove, and the top retaining ring is coaxial with the piston, and the top surface of the groove is higher than the top surface of the spring plate of the top retaining ring.

[0014] Preferably, the bottom surface of the piston is fixedly connected to the step body, the step body is fixedly connected to the outer periphery of the piston rod, the bottom surface of the step body is lower than the bottom surface of the spring plate of the bottom retaining ring, and a gap is reserved between the spring plate of the bottom retaining ring and the step body.

[0015] Preferably, multiple vent holes are evenly distributed along the circumference of the piston, and the diameter of the baffle is larger than the diameter of the vent holes.

[0016] Preferably, the diameter of the bottom retaining ring is larger than the diameter of the top retaining ring, the baffle of the bottom retaining ring is set towards the center of the bottom retaining ring, and the baffle of the top retaining ring is set away from the center of the top retaining ring.

[0017] Preferably, the springs are all U-shaped springs, with one end of the spring fixedly connected to the top or bottom retaining ring, and the other end fixedly connected to the baffle plate, with the opening of the spring facing the piston.

[0018] Compared with the prior art, the advantages and positive effects of this invention are: This invention features a support component mounted on one end of a central shaft hinged to both the upper and lower connecting frames. The other end of the support component is hinged to the bottom surface of the mounting frame. The spring in the support component drives the movable skirt to open and provides support for the skirt, eliminating the need for additional force from personnel to fix it, thus improving the convenience of maintenance operations and increasing operational efficiency. Furthermore, this invention utilizes the piston vent of the support component, in conjunction with baffles at the top or bottom of the vent, to control gas flow and achieve damping and buffering of the piston movement. When the movable skirt opens, strong damping is generated to ensure a smooth opening speed, preventing impact injuries and reducing safety hazards. When closing, weak damping is generated, enabling a quick and effortless closing operation. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 This is a front view of the hinge structure of this invention when the movable skirt is not opened; Figure 2 This is a front view of the movable skirt panel of the hinge structure in an embodiment of the present invention when it is opened; Figure 3 This is a perspective view of the support component according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal components of the support component according to an embodiment of the present invention; Figure 5 This is a perspective view of the top retaining ring according to an embodiment of the present invention; Figure 6 This is a perspective view of the bottom retaining ring according to an embodiment of the present invention; Figure 7 This is a perspective view of the upper connecting frame and the lower connecting frame according to an embodiment of the present invention; In the picture: 1. Mounting bracket; 2. Support assembly; 21. Mounting plate; 22. Cylinder body; 23. Piston; 231. Piston rod; 232. Mounting hole; 233. Groove; 234. Vent hole; 235. Stepped body; 24. Spring; 25. Top retaining ring; 251. Top spring piece; 252. Top retaining piece; 26. Bottom retaining ring; 261. Bottom spring piece; 262. Bottom retaining piece; 27. Hinge sleeve; 3. Connecting bracket; 31. Mounting plate; 32. Long cantilever; 33. Short cantilever; 34. First connecting rod; 35. Second connecting rod; 4. Mounting seat; 5. Movable skirt; 6. Fixed skirt; 61. Clearance groove; 7. Central shaft. Detailed Implementation

[0021] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] The invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a hinge structure for a skirt panel, such as... Figure 1 As shown, it includes a mounting bracket 1 and a mounting base 4, the first side of the mounting bracket 1 ( Figure 1 On the left side (along the lateral outer side of the vehicle), a fixed skirt plate 6 is fixedly connected, and on the first side of the mounting base 4, a movable skirt plate 5 is fixedly connected. The bottom surface of the mounting bracket 1 is connected to the upper connecting bracket 3, and the top surface of the mounting base 4 is connected to the lower connecting bracket 3. The upper connecting bracket 3 and the lower connecting bracket 3 have the same structure and are both hinged to the central shaft 7. Figure 1 As shown, the structures of the upper connecting frame 3 and the lower connecting frame 3 are symmetrical about the central axis 7. It can be understood that the mounting base 4 can rotate relative to the mounting frame 1 towards the first side of the mounting frame 1, thereby driving the movable skirt 5 to rotate outward relative to the fixed skirt 6 and open.

[0023] like Figure 1 As shown, in this embodiment, a support assembly 2 is installed between the mounting bracket 1 and the mounting base 4. The support assembly 2 is installed between the mounting bracket 1 and the central shaft 7. Specifically, as shown... Figure 3 As shown, the first end (top of the support component 2) of the support component 2 is hinged to the bottom surface of the mounting frame 1, and the second end (bottom of the support component 2) of the support component 2 is hinged to the central shaft 7. In this embodiment, the second end of the support component 2 can be telescopically moved relative to the first end.

[0024] like Figure 3 , Figure 4As shown, the support assembly 2 includes a cylinder 22, a piston 23 is slidably connected inside the cylinder 22, a piston rod 231 is fixedly connected to the bottom end of the piston 23, the bottom end of the piston rod 231 extends out of the cylinder 22 and is fixedly connected to a hinge sleeve 27, and the central shaft 7 is sleeved in the hinge sleeve 27, so that the second end of the support assembly 2 is hinged to the central shaft 7, and the piston 23 drives the piston rod 231 to move relative to the cylinder 22, so that the second end of the support assembly 2 can move telescopically relative to the first end.

[0025] It is understandable that when the movable skirt 5 and the mounting base 4 move outward, they will cause the lower connecting frame 3 to rotate relative to the upper connecting frame 3, and at the same time, they will cause the hinge sleeve 27 to move with the central shaft 7, so that the piston rod 231 drives the piston 23 to move relative to the cylinder 22.

[0026] like Figure 4 As shown, a mounting hole 232 is formed at the top of the piston 23, and a spring 24 is fixedly connected to the inner wall of the bottom end of the mounting hole 232. The top of the spring 24 is fixedly connected to the top of the inner wall of the cylinder 22. In this embodiment, when the top of the piston 23 contacts the top of the inner wall of the cylinder 22, the spring 24 is in a compressed state. It can be understood that when the movable skirt 5 rotates outward relative to the mounting bracket 1, the spring 24 can push the piston 23 and the piston rod 231, thereby applying a thrust to the central shaft 7, causing the central shaft 7 to move and drive the upper connecting bracket 3 and the lower connecting bracket 3 to rotate relative to each other.

[0027] like Figure 4 As shown, the piston 23 has multiple vent holes 234 that pass through the top and bottom and are parallel to the piston axis. When the piston 23 moves toward the bottom of the cylinder 22, the bottom of the piston 23 will compress the gas between the piston 23 and the bottom of the cylinder 22. Under the action of pressure, the gas flows from the vent holes 234 to the top of the piston 23. In this process, the gas plays a damping role on the movement of the piston 23.

[0028] However, if the gas flows freely back and forth between the two ends of the vent 234, it cannot provide effective damping. Therefore, as... Figure 4 , Figure 5 , Figure 6 As shown, a top retaining ring 25 is fixedly connected to the top surface of piston 23, and a bottom retaining ring 26 is fixedly connected to the bottom surface of piston 23. Both the top retaining ring 25 and the bottom retaining ring 26 are fixedly connected to multiple spring pieces, and each spring piece is fixedly connected to a baffle plate. Specifically, the top retaining ring 25 is fixedly connected to multiple top spring pieces 251, and the top spring pieces 251 are fixedly connected to a top baffle plate 252. The bottom retaining ring 26 is fixedly connected to multiple bottom spring pieces 261, and the bottom spring pieces 261 are fixedly connected to a bottom baffle plate 262. In this embodiment, the baffle plate is used to block the top or bottom end of the vent hole 234. It should be noted that the vent hole 234 is only blocked at one end; that is, only the top end of the vent hole 234 is covered and blocked by the top baffle plate 252, or only the bottom end of the vent hole 234 is covered and blocked by the bottom baffle plate 262.

[0029] Understandably, when the locking mechanism of the movable skirt 5 is opened (the locking mechanism is installed between the movable skirt 5 and the vehicle body or fixed skirt 5 to prevent the movable skirt 5 from opening during operation), the piston 23 moves towards the bottom of the cylinder 22 under the push of the spring 24. The piston rod 231 pushes the central shaft 7 to move, which in turn pushes the movable skirt 5 to move outward relative to the mounting bracket 1. The gas at the bottom of the cylinder 22 pushes the top baffle 252 through the vent hole 234. The gas enters the top of the piston 23 from the bottom, which dampens the downward movement of the piston 23. Finally, when the spring 24 compresses the piston 23 and moves it to the bottom of the cylinder 22, the angle between the movable skirt 5 and the fixed skirt 6 is 60 degrees. The gas enters the top of the piston, and the spring 24 provides support for the piston rod 231, which in turn provides support for the central shaft 7 and the mounting bracket 4.

[0030] It is also understandable that when an external force pushes the movable skirt 5 and the mounting base 4 to reset relative to the mounting bracket 1, under pressure, the lower connecting bracket 3 drives the movable skirt 5 and the mounting base 4 to reset until the movable skirt 5 is reset and locked in place. During this process, the piston rod 231 pushes the piston 23 to move towards the top of the cylinder 22. At this time, the gas in the compressed cylinder flows from the top through the vent hole 234 to the bottom of the cylinder 22. At this time, the gas in the cylinder 22 pushes open the bottom baffle 262 of the bottom baffle ring 26, and the spring 24 is recompressed.

[0031] In this embodiment, under the action of the support component 2, when the movable skirt panel 5 is opened, the top and bottom retaining rings, together with the spring and compressed gas, can open and support the movable skirt panel 5 without the need for additional force from staff to fix it, greatly improving the convenience of maintenance operations. It eliminates the need for manual steps such as holding the panel and fixing it, and can shorten the preparation time for maintenance of a single skirt panel by more than 40%, improving operation and maintenance efficiency. It also solves the technical problem in the prior art that the cover panel cannot be kept in the open state after it is opened, resulting in a cumbersome operation process and poor convenience.

[0032] like Figure 5 , Figure 6 As shown, the number of baffles in the top retaining ring 25 is less than the number of baffles in the bottom retaining ring 26. In this embodiment, the top retaining ring 25 has two baffles, and the bottom retaining ring 26 has six baffles. It should be noted that when the mounting base 4 moves outward relative to the mounting bracket 1, because the number of top baffles 252 is less than the number of bottom baffles 262, when the piston 23 moves towards the bottom of the cylinder 22, the gas flows slowly towards the top of the cylinder, and the gas has a large damping effect on the piston 23. However, when the mounting base 4 returns to its original position relative to the mounting bracket 1, because the number of bottom baffles 262 is greater than the number of top baffles 252, the gas flows quickly, and the damping effect on the piston 23 is small.

[0033] It is understandable that this bidirectional differentiated damping control structure design in this embodiment, by setting different numbers of top and bottom baffles (such as a ratio of two to six), ensures that when the movable skirt 5 is opened, only two through holes are open to form strong damping, thus ensuring a smooth opening speed to avoid impact and injury, and reducing the risk of safety accidents. When closed, all six through holes are open to form weak damping, thus achieving a fast and effortless closing operation.

[0034] In this embodiment, as Figure 1 , Figure 2 , Figure 7 As shown, the connecting frame 3 includes a mounting plate 31, on which a long cantilever 32 and a short cantilever 33 are fixedly connected. The short cantilever 33 is located on the second side of the long cantilever 32 (it should be noted that in this embodiment, the second side refers to the right side of the mounting frame 1), and both the long cantilever 32 and the short cantilever 33 are perpendicular to the mounting plate 31; Figure 1 , Figure 2 , Figure 7 As shown, the bottom end of the long cantilever 32 is hinged to the first end of the first link 34, and the middle part of the first link 34 is hinged to the central shaft 7; the bottom end of the short cantilever 33 is hinged to the first end of the second link 35, and the second end of the second link 35 of the upper connecting frame 3 is hinged to the second end of the first link 34 of the lower connecting frame 3.

[0035] like Figure 1 As shown, after the two connecting frames 3 are connected vertically, a quadrilateral is formed inside both the upper connecting frame 3 and the lower connecting frame 3. In each connecting frame 3, only the long cantilever 32 is a vertically fixed side, and the other sides are movable sides that are hinged to each other. When the central axis 7 moves downward, it drives the first connecting rod 34 of the upper connecting frame 3 to move downward. The first connecting rod of the upper connecting frame 3 will drive the lower connecting frame 3 to rotate clockwise relative to the mounting frame 1, thereby driving the mounting base 4 and the movable skirt 5 to rotate and open relative to the mounting frame 1.

[0036] like Figure 2 As shown, when the movable skirt 5 is pulled to move outward, the second link 35 of the upper connecting frame 3 contacts the long cantilever. At this time, the first link can no longer rotate relative to the long cantilever, and the mounting base 4 can open more than 90° relative to the mounting frame 1 (120° in this embodiment).

[0037] This embodiment achieves the technical effects of opening and positioning of the movable skirt 5, opening slowly to prevent injury, and closing quickly and effortlessly through the integrated design of "spring-cylinder linkage drive + connecting frame rotation + differentiated baffle damping adjustment", which solves the inefficiency problem of the traditional structure of "maintenance requires holding plate + manual fixing".

[0038] like Figure 7As shown, the short and long cantilever arms are arranged along the axial direction of the vehicle body on the mounting plate. The first link of the lower connecting frame 3 and the upper connecting frame 3 is sleeved on the central shaft 7 along the axial direction of the vehicle body and rotates relative to the central shaft 7. The length of the central shaft 7 is greater than the width of the two first links along the axial direction of the vehicle body. The hinged sleeve of the support component 2 is connected to the end of the central shaft 7 away from the first link of the upper connecting frame. In terms of spatial design, motion interference between the support component 2 and the two connecting frames 3 is avoided.

[0039] like Figure 3 As shown, the support assembly 2 includes a mounting plate 21. The bottom end of the mounting plate 21 is hinged to the top outer wall of the cylinder block 22. Along the vehicle body axis, the mounting plate 21 is mounted on the side of the short cantilever of the upper connecting frame 3 away from the long cantilever.

[0040] In this embodiment, as Figure 1 , Figure 2 As shown, the bottom end of the fixed skirt board 6 is reserved with a clearance groove 61, and the top end of the movable skirt board 5 is accommodated in the clearance groove 61 to avoid interference between the fixed skirt board 6 and the movable skirt board 5.

[0041] like Figure 4 As shown, a groove 233 is formed on the top surface of the piston 23. The groove 233 is coaxially arranged with the piston 23, piston rod 231, and mounting hole 232. The top retaining ring 25 is fixedly installed in the groove 233 and is coaxial with the piston 23. The top end of the spring 24 passes through the center of the top retaining ring 25 and is fixedly connected to the top end of the inner wall of the cylinder 22. The top surface of the groove 233 is higher than the top surface of the top spring 251.

[0042] In this embodiment, the purpose of creating the groove 233 is to allow the top retaining ring 25 to be installed in the groove 233, so as to prevent the piston 23 from damaging the top retaining ring 25 when it moves towards the top of the inner wall of the cylinder 22, to prevent the piston from damaging the top spring 251 of the top retaining ring 25, and to prevent the top spring 251 from failing to drive the top retaining plate 252 to reset.

[0043] like Figure 4 As shown, a step body 235 is fixedly connected to the bottom surface of the piston 23. The step body 235 is fixedly connected to the outer periphery of the piston rod 231. The bottom surface of the step body 235 is lower than the bottom surface of the bottom spring piece 261, and a gap is reserved between the bottom baffle 262 of the bottom retaining ring 26 and the step body 235 to prevent the bottom baffle 262 from being stuck by the step body 235 and unable to be lifted by the airflow. In this embodiment, the step body 235 has two functions: one is to provide axial restriction for the piston rod 231, and the other is to prevent the bottom spring piece 261 from being crushed.

[0044] In this embodiment, multiple vent holes 234 are evenly distributed along the circumference of the piston 23 to ensure uniform airflow. The diameters of the bottom baffle and the top baffle are larger than the diameters of the vent holes 234 to ensure the vent holes 234 are blocked.

[0045] like Figure 4 As shown, the diameter of the bottom retaining ring 26 is larger than the diameter of the top retaining ring 25. The bottom retaining plate 262 is positioned facing the center of the bottom retaining ring 26, while the top retaining plate 252 is positioned away from the center of the top retaining ring. This design ensures the opening of the groove 233 and the fixed connection of the step body 235, ensures that the groove 233 accommodates the top retaining ring 25, and ensures that the bottom retaining plate 262 and the step body 235 do not interfere with each other. At the same time, it also achieves the sealing of the vent hole by the bottom and top retaining plates.

[0046] In this embodiment, since the vent 234 is only blocked at one end, the baffles are not evenly distributed on the top baffle ring 25 or the bottom baffle ring 26. The baffles are symmetrically arranged with respect to the center of the top baffle ring 25 or the bottom baffle ring 26, so as to ensure that when the top baffle ring 25 or the bottom baffle ring 26 blocks the vent 234, all vents 234 can be blocked at one end, and the airflow can be balanced.

[0047] In this embodiment, as Figure 1 , Figure 2 As shown, the mounting plate 31 is fixedly connected to the bottom surface of the mounting frame or the top surface of the mounting base. In this embodiment, the mounting plate 31 is fixedly connected to the bottom surface of the mounting frame or the top surface of the mounting base by bolts, so that the damaged parts can be disassembled during inspection or repair and replacement.

[0048] like Figure 5 , Figure 6 As shown, both the top and bottom springs are U-shaped. One end of the spring is fixedly connected to the top or bottom retaining ring, and the other end is fixedly connected to a baffle plate. The opening of the spring faces the piston. When the airflow flows from the bottom to the top, the bottom baffle plate 262 blocks the bottom end of the vent 234, and the top end of the vent 234, which is not blocked at the bottom, is opened by the gas. After the spring returns to its original position, it can block the top or bottom end of the vent 234.

[0049] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A hinge structure for a skirt panel, comprising a mounting bracket and a mounting base, wherein a fixed skirt panel is fixedly connected to a first side of the mounting bracket, and a movable skirt panel is fixedly connected to a first side of the mounting base; characterized in that, The bottom surface of the mounting bracket is connected to the upper connecting bracket, and the top surface of the mounting base is connected to the lower connecting bracket. The upper and lower connecting brackets are hinged to the central axis and are symmetrical with respect to the central axis. The top of the support assembly is hinged to the bottom surface of the mounting bracket. The support assembly includes a cylinder body, a piston is slidably connected inside the cylinder body, a piston rod is fixedly connected to the bottom end of the piston, the bottom end of the piston rod extends out of the cylinder body and is fixedly connected to the hinge sleeve, and the central shaft is sleeved inside the hinge sleeve. The piston has a mounting hole at its top, and a spring is fixedly connected inside the mounting hole. The top of the spring is fixedly connected to the top of the inner wall of the cylinder. Multiple through-holes parallel to the piston are opened on the piston. A top retaining ring is fixedly connected to the top surface of the piston, and a bottom retaining ring is fixedly connected to the bottom surface of the piston. Multiple spring pieces are fixedly connected to both the top and bottom retaining rings, and each spring piece is fixedly connected to a baffle plate. The baffle plate blocks the top or bottom of the vent hole, and the vent hole is blocked only at one end. The number of baffles in the top baffle ring is less than the number of baffles in the bottom baffle ring.

2. The hinge structure for a skirt panel as described in claim 1, characterized in that, The connecting frame includes a mounting plate on which a long cantilever and a short cantilever are fixedly connected. The short cantilever is located on the second side of the long cantilever. The bottom end of the long cantilever is hinged to the first end of the first connecting rod, and the middle part of the first connecting rod is hinged to the central axis. The bottom end of the short cantilever is hinged to the first end of the second connecting rod, and the second end of the second connecting rod of the upper connecting frame is hinged to the second end of the first connecting rod of the lower connecting frame.

3. A hinge structure for a skirt panel as described in claim 2, characterized in that, The short and long cantilever arms are arranged along the axial direction of the vehicle body on the mounting plate. The first link of the lower connecting frame and the upper connecting frame is sleeved on the central shaft along the axial direction of the vehicle body, and is hinged to the end of the central shaft away from the first link of the upper connecting frame.

4. A hinge structure for a skirt panel as described in claim 3, characterized in that, The support assembly includes a mounting plate, the bottom end of which is hinged to the outer wall of the top of the cylinder. Along the vehicle body axis, the mounting plate is installed on the side of the short cantilever of the upper connecting frame away from the long cantilever.

5. A hinge structure for a skirt panel as described in claim 1, characterized in that, The bottom of the fixed skirt board is reserved with a clearance groove, and the top of the movable skirt board is accommodated in the clearance groove.

6. A hinge structure for a skirt panel as described in claim 1, characterized in that, A groove is formed on the top surface of the piston. The groove is coaxial with the piston, piston rod, and mounting hole. The top retaining ring is fixedly installed in the groove and is coaxial with the piston. The top surface of the groove is higher than the top surface of the spring plate of the top retaining ring.

7. A hinge structure for a skirt panel as described in claim 1, characterized in that, The piston bottom surface is fixedly connected to the step body, which is fixedly connected to the outer periphery of the piston rod. The bottom surface of the step body is lower than the bottom surface of the spring plate of the bottom retaining ring, and a gap is reserved between the spring plate of the bottom retaining ring and the step body.

8. A hinge structure for a skirt panel as described in claim 1, characterized in that, The multiple vent holes are evenly distributed along the circumference of the piston, and the diameter of the baffle is larger than the diameter of the vent holes.

9. A hinge structure for a skirt panel as described in claim 1, characterized in that, The diameter of the bottom retaining ring is larger than the diameter of the top retaining ring. The baffle of the bottom retaining ring is set towards the center of the bottom retaining ring, while the baffle of the top retaining ring is set away from the center of the top retaining ring.

10. A hinge structure for a skirt panel as described in claim 1, characterized in that, All the springs are U-shaped, with one end fixedly connected to the top or bottom retaining ring and the other end fixedly connected to the baffle. The opening of the spring faces the piston.

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