Floor access structure and vehicle
By using an access sleeve and upper and lower sealing components in the floor access panel structure, the problems of poor sealing and inconvenient disassembly in the prior art are solved, achieving effective sealing and good sound insulation for access panels with special structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FAW JIEFANG AUTOMOTIVE CO
- Filing Date
- 2023-07-10
- Publication Date
- 2026-05-29
AI Technical Summary
In the existing technology, the size and specifications of the inspection port cover for bus floor are fixed, which cannot adapt to the diversity of floor frame structures, resulting in poor sealing effect and inconvenience in disassembly.
Design a floor access port structure, including an access cylinder, an upper sealing assembly, and a lower sealing assembly. The access cylinder is coaxially inserted into the access port, and the opening of the access cylinder is sealed by the upper and lower sealing assemblies. It can adapt to access ports of different shapes and sizes, and a simple sealing cover is used to achieve double sealing.
It achieves effective sealing of special structure inspection ports, solves the problem of poor sealing, and has a simple structure, is easy to disassemble, and has good sound insulation effect.
Smart Images
Figure CN116691851B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive manufacturing technology, and in particular to a floor access panel structure and vehicle. Background Technology
[0002] Currently, with the increasing demands of passengers for the safety, comfort, and reliability of buses, bus chassis are generally equipped with air suspension systems to improve the overall comfort and reliability of the vehicle. However, this also brings the problem of higher requirements for the maintenance and repair of the entire vehicle. Regular maintenance is required for components such as airbags and shock absorbers in the air suspension system. Therefore, it is usually necessary to open a suitable-sized access panel on the bus floor to facilitate the maintenance of relevant components, and install a removable access cover on the access panel to ensure good sealing and good sound insulation and noise reduction.
[0003] Currently, domestic suppliers of floor access covers typically provide molded, one-piece access covers in a limited range of fixed sizes. When selecting these products, the bus floor's frame structure and access cover dimensions must strictly adhere to the supplier's specifications to meet assembly requirements. However, in actual bus floor design, the floor frame structure must first accommodate the layout of interior facilities, which often results in the inability to select appropriately sized access covers. Summary of the Invention
[0004] Therefore, it is necessary to address the aforementioned problems in the existing technology by providing a floor access panel structure that is simple and reliable, has good sound insulation, and is easy to disassemble, as well as a vehicle including the floor access panel structure.
[0005] According to one aspect of this application, a floor access panel structure is provided, comprising:
[0006] The floor has access panels that extend through both the top and bottom sides.
[0007] The inspection cylinder is coaxially inserted into the inspection port and fits against the inner wall of the inspection port. The upper and lower ends of the inspection cylinder have openings that communicate with each other.
[0008] An upper sealing assembly is installed at the upper end of the inspection cylinder and seals the upper opening of the inspection cylinder;
[0009] A lower sealing assembly is installed at the lower end of the inspection cylinder and seals the lower opening of the inspection cylinder.
[0010] In one embodiment, the upper end face of the inspection cylinder is flush with the upper surface of the floor; and / or the lower end face of the inspection cylinder is flush with the lower surface of the floor.
[0011] In one embodiment, the upper end of the access port has a first step around its own central axis, and the upper end of the access cylinder has a first flange around the central axis of the access cylinder and extending outward in the radial direction of the access cylinder. The first flange overlaps the first step, and the upper side of the first flange is flush with the upper surface of the floor.
[0012] In one embodiment, the floor includes a body and a floor mat laid on the upper surface of the body. The floor mat has a first through hole extending through its upper and lower sides, and the body has a second through hole extending through its upper and lower sides. The first through hole and the second through hole are interconnected and together form the access port. The diameter of the first through hole is larger than the diameter of the second through hole, so as to form the first step at the upper end of the access port.
[0013] In one embodiment, the upper end of the inspection cylinder is provided with a first mounting hole, and the bottom wall of the first mounting hole is provided with a second mounting hole that penetrates the bottom wall. The first mounting hole and the second mounting hole together form a second flange. The second flange surrounds the central axis of the inspection cylinder and extends inward along the radial direction of the inspection cylinder, and the lower side of the second flange is flush with the lower surface of the floor.
[0014] In one embodiment, the upper sealing assembly has a second step surrounding the central axis of the access port, the second step having a first abutment surface and a second abutment surface, the first abutment surface abutting against the upper end face of the access cylinder and a portion of the upper surface of the floor, and the second abutment surface conforming to the inner sidewall of the first mounting hole.
[0015] In one embodiment, the lower sealing assembly has a third step surrounding the central axis of the access port, the third step having a third abutting surface and a fourth abutting surface, the third abutting surface abutting against the bottom wall of the first mounting hole, the fourth abutting surface fitting against the inner side wall of the second mounting hole, and the lower side of the lower sealing assembly being flush with the lower surface of the floor and the lower end face of the access cylinder.
[0016] In one embodiment, the floor access panel structure further includes a sound insulation component, wherein the upper sealing component and the lower sealing component are spaced apart in the vertical direction and form a mounting position, and the sound insulation component is filled in the mounting position.
[0017] In one embodiment, the floor is arc-shaped, the access panel extends vertically through the floor, and the inner wall of the access panel is perpendicular to a horizontal plane.
[0018] According to another aspect of this application, a vehicle is provided, including a passenger compartment, the bottom of which has a floor access structure as described above, the upper side of which faces the interior of the passenger compartment and the lower side of which faces the exterior of the passenger compartment.
[0019] The aforementioned floor access panel structure and the vehicle including this structure, by incorporating an access cylinder coaxially inserted into and conforming to the inner wall of the access panel, allows for customization of the cylinder's exterior design based on the shape and size of the access panel. This ensures a smooth fit between the cylinder and the access panel. By designing the internal structure of the access cylinder as a conventional straight hole and using simpler upper and lower sealing components, or by directly selecting existing standard flat sealing caps, the access panel can be sealed. This results in a simple floor access panel structure suitable for sealing access panels with special floor structures, solving the problem of not being able to use standard floor sealing caps for special structures. Furthermore, the floor access panel structure is easy to disassemble and provides a reliable seal, addressing the issues of poor sealing and inconvenient installation associated with externally purchased sealing caps for special structures. Attached Figure Description
[0020] Figure 1 A cross-sectional view of a floor access panel structure provided in an embodiment of this application.
[0021] Figure 2 An exploded cross-sectional view of a floor access panel structure provided in an embodiment of this application.
[0022] Figure 3 A cross-sectional view of a floor provided in an embodiment of this application.
[0023] Figure 4 This is a cross-sectional view of a maintenance cylinder provided in one embodiment of this application.
[0024] Figure 5 This is a cross-sectional view of an upper sealing assembly provided in an embodiment of this application.
[0025] Figure 6 This is a cross-sectional view of a lower sealing assembly provided in an embodiment of this application.
[0026] Figure 7 This is a schematic diagram illustrating the disassembly of the upper and lower sealing components to open the access port for maintenance, as provided in an embodiment of this application.
[0027] Figure 8 This is a schematic diagram illustrating the installation of the upper and lower sealing components to close the inspection port after maintenance is completed, according to an embodiment of this application.
[0028] Explanation of reference numerals in the attached figures:
[0029] 10. Floor access panel structure; 100. Floor; 101. Access panel; 102. First step; 110. Body; 111. Upper sealing plate; 112. Lower sealing plate; 113. Filling layer; 114. Second through hole; 120. Floor pad; 121. First through hole; 200. Access sleeve; 201. First flange; 202. First mounting hole; 203. Second mounting hole; 204. Second flange; 300. Upper sealing assembly; 301. Second step; 3011. First contact surface; 3012. Second contact surface; 310. Upper sealing cover; 320. Upper sealing gasket; 400. Lower sealing assembly; 401. Third step; 4011. Third contact surface; 4012. Fourth contact surface; 410. Lower sealing cover; 420. Lower sealing gasket; 500. Sound insulation component. Detailed Implementation
[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.
[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0036] This application provides a floor access panel structure and a vehicle, wherein the vehicle includes the floor access panel structure. The floor access panel structure is used to facilitate users to perform regular maintenance on components such as airbags and shock absorbers in the air suspension system at the bottom of the vehicle, and can isolate the air suspension system from the interior of the vehicle compartment to form a good sealing and sound insulation effect.
[0037] The following description uses the application of the floor access panel structure in a vehicle, particularly a bus, as an example to illustrate the structure of the floor access panel structure in this application. It is understood that in other embodiments, the floor access panel structure of this application is not limited to vehicles, but can also be applied to other equipment or buildings with floors that require regular maintenance of the equipment beneath the floor; this is not a limitation.
[0038] See Figure 1 and Figure 2 , Figure 1 and Figure 2 A schematic diagram of a floor access panel structure 10 according to an embodiment of this application is shown. The floor access panel structure 10 provided in this embodiment is installed at the bottom of a vehicle's passenger compartment, with its upper side facing the interior of the passenger compartment and its lower side facing the exterior. Components such as the vehicle's air suspension system are installed on the lower side of the floor access panel structure 10. The floor access panel structure 10 includes a floor 100, an access sleeve 200, an upper sealing assembly 300, and a lower sealing assembly 400. The floor 100 has access panels 101 extending through both the upper and lower sides of the floor 100. When it is necessary to inspect components such as the air suspension system on the lower side of the floor 100, the operator can reach under the floor 100 through the access panels 101 to inspect components such as the airbags and shock absorbers of the air suspension system. The inspection cylinder 200 is coaxially inserted into the inspection port 101 and fits against the inner wall of the inspection port 101. The upper and lower ends of the inspection cylinder 200 have interconnected openings. The inspection cylinder 200 is used to match the structure, shape, and size of the inspection port 101. The upper sealing assembly 300 is installed at the upper end of the inspection cylinder 200 and closes the upper opening of the inspection cylinder 200; the lower sealing assembly 400 is installed at the lower end of the inspection cylinder 200 and closes the lower opening of the inspection cylinder 200, thus forming two seals, achieving a double seal on the inspection port 101 and providing a better sealing effect.
[0039] In one embodiment, the floor 100 is arc-shaped, and an access port 101 extends vertically through the floor 100, with the inner wall of the access port 101 perpendicular to a horizontal plane. The lower part of the arc-shaped floor 100 is a wheel, and the curvature matches the curvature of the wheel, so that the arc-shaped floor 100 can partially enclose the wheel.
[0040] To ensure the aesthetics of the floor access port structure 10, the upper end face of the access cylinder 200 is flush with the upper surface, and the lower end face is flush with the lower surface of the floor 100. This makes the access cylinder 200 and the floor 100 appear as a single unit after the access cylinder 200 is inserted into the access port 101. In this way, regardless of the structure of the access port 101, the inner wall of the access cylinder 200 only needs to be designed as a simple perforated structure to achieve the sealing of the access port 101 through the upper sealing component 300 and the lower sealing component 400.
[0041] It is understandable that the upper and lower ends of the inspection cylinder 200 may be flush with the surface of the floor 100, or one of the upper and lower ends may be flush with the surface of the floor 100.
[0042] Specifically, see Figure 3The floor 100 includes a body 110 and a floor mat 120. The floor mat 120 is laid on the upper surface of the body 110 and can be made of materials such as leather, plastic or felt. In order to make the floor 100 arc-shaped, the body 110 has an arc structure. The body 110 includes an upper sealing plate 111, a lower sealing plate 112 and a filling layer 113. The upper sealing plate 111 and the lower sealing plate 112 together form a structure with a closed space. The filling layer 113 can be a foam material or the like, which fills the closed space, thus forming the body 110 of the floor 100 together with the upper sealing plate 111 and the lower sealing plate 112. In one embodiment, the floor mat 120 has a first through hole 121 penetrating its upper and lower sides, and the body 110 has a second through hole 114 penetrating its upper and lower sides. The first through hole 121 and the second through hole 114 are interconnected and together form an inspection port 101. The diameter of the first through hole 121 is larger than the diameter of the second through hole 114, so that the bottom wall of the first through hole 121 and the side wall of the second through hole 114 form a first step 102 around the central axis of the inspection port 101 at the upper opening of the inspection port 101.
[0043] In other embodiments, the structure of the floor 100 is not limited to the structure described above, and can also be an integrally formed structure, with the first step 102 formed by machining. The specific structure is not limited.
[0044] Further, see Figure 4 The inspection cylinder 200 is cylindrical, with a first flange 201 at its upper end that surrounds the central axis of the inspection cylinder 200 and extends outward in the radial direction of the inspection cylinder 200. The first flange 201 is accommodated in the first through hole 121 and overlaps the first step 102. Preferably, the first flange 201 can be fixedly connected to the upper sealing plate 111 by welding or bonding to overlap the first step 102. The outer wall of the inspection cylinder 200 is also welded or bonded to the lower sealing plate 112 so that the inspection cylinder 200 is fixedly inserted into the inspection port 101. Furthermore, the upper side of the first flange 201 is flush with the upper surface of the floor 100, so that the upper end face of the inspection cylinder 200 is flush with the upper surface of the floor 100.
[0045] Furthermore, the upper end of the inspection cylinder 200 is provided with a first mounting hole 202, the depth of which is slightly less than the height of the inspection cylinder 200, and the bottom wall of the first mounting hole 202 is provided with a second mounting hole 203 that penetrates the bottom wall, so that the first mounting hole 202 and the second mounting hole 203 together form a second flange 204. The second flange 204 surrounds the central axis of the inspection cylinder 200 and extends inward along the radial direction of the inspection cylinder 200, and the lower side of the second flange 204 is flush with the lower surface of the floor 100.
[0046] Thus, by making the height of the inspection cylinder 200 equal to the thickness of the floor 100, and by ensuring that the upper and lower end faces of the inspection cylinder 200 are flush with the upper surface of the floor 100, and by ensuring that the outer diameter of the inspection cylinder 200 is equal to the inner diameter of the inspection port 101, the external shape of the inspection cylinder 200 perfectly matches the inner wall shape of the inspection port 101, achieving a tight fit between the inspection cylinder 200 and the inspection port 101. Simultaneously, the first mounting hole 202 and the second mounting hole 203 within the inspection cylinder 200 can be simple through-hole structures, thereby simplifying the structure of the upper sealing assembly 300 and the lower sealing assembly 400.
[0047] Specifically, see Figure 4 and Figure 5 The upper sealing assembly 300 is a cylindrical stepped structure with a second step 301 surrounding the central axis of the inspection port 101. The second step 301 has a first abutting surface 3011 and a second abutting surface 3012. The first abutting surface 3011 abuts against the upper end face of the inspection cylinder 200 and part of the upper surface of the floor 100, and the second abutting surface 3012 fits against the inner sidewall of the first mounting hole 202. Similarly, the lower sealing assembly 400 is also a cylindrical stepped structure with a third step 401 surrounding the central axis of the access port 101. The third step 401 has a third abutment surface 4011 and a fourth abutment surface 4012. The third abutment surface 4011 abuts against the bottom wall of the first mounting hole 202 of the access cylinder 200 (i.e., the upper side of the second flange 204), and the fourth abutment surface 4012 fits against the inner side wall of the second mounting hole 203, so that the lower side of the lower sealing assembly 400 is flush with the lower surface of the floor 100 and the lower end face of the access cylinder 200.
[0048] More specifically, see Figure 4 and Figure 6The upper sealing assembly 300 includes an upper sealing cover 310 and an upper sealing gasket 320. The upper sealing cover 310 can be a stamped part made of steel, and its stamped shape can be round or square. The upper surface of the upper sealing cover 310 can have the same curvature as the floor 100 to ensure a tight fit with the curved upper surface of the floor 100 after installation. The upper sealing gasket 320 can be made of closed-cell foamed EPDM rubber material, and its back has pressure-sensitive adhesive tape, which is firmly adhered to the lower surface of the upper sealing cover 310. Preferably, the upper sealing cover 310 and the upper sealing gasket 320 are fastened to the upper surface of the floor 100 by screws or other fasteners, thereby enabling the upper sealing assembly 300 to have a better sealing effect. Similar to the upper sealing assembly 300, the lower sealing assembly 400 includes a lower sealing cover 410 and a lower sealing gasket 420. The lower sealing cover 410 can also be a stamped steel plate, and the lower sealing gasket 420 can be made of closed-cell foamed EPDM rubber material, with pressure-sensitive adhesive tape on its back, firmly adhering to the lower surface of the lower sealing cover 410. Preferably, the lower sealing cover 410 and the lower sealing gasket 420 are also fastened to the upper surface of the second flange 204 of the inspection cylinder 200 by screws or other fasteners, ensuring that the lower sealing assembly 400 is tightly pressed against the second flange 204, thereby giving the lower sealing assembly 400 a better sealing effect.
[0049] It is worth noting that since the first mounting hole 202 and the second mounting hole 203 of the inspection cylinder 200 are both simple straight holes, the upper sealing assembly 300 and the lower sealing assembly 400 can also use existing standard parts without redesigning, and there are no specific limitations.
[0050] Furthermore, as a further improvement to the above embodiments, please continue to refer to... Figure 1 and Figure 2 The floor access panel structure 10 also includes a sound insulation component 500. Since the upper sealing component 300 and the lower sealing component 400 seal the upper and lower openings of the access panel 200 respectively, the upper sealing component 300 and the lower sealing component 400 are vertically spaced, forming an installation position between them. The sound insulation component 500 is filled into this installation position. Preferably, the sound insulation component 500 is made of sound-absorbing cotton, which is pressed firmly into the installation position by the pressure of the upper sealing component 300 and the lower sealing component 400. This better achieves noise reduction and sound insulation, solving the problem of poor sound insulation in existing floor access panel structures 10, which allows tire noise to easily enter the vehicle cabin.
[0051] Therefore, the floor access port structure 10 provided in this application, by setting an access cylinder 200, and by setting an upper sealing component 300 to close the upper opening of the access cylinder 200, and setting a lower sealing component 400 to close the lower opening of the access cylinder 200, allows the exterior of the access cylinder 200 to be designed accordingly based on the shape and size of the access port 101, thereby meeting the assembly requirements of the access cylinder 200 and the access port 101. As long as the interior of the access cylinder 200 is designed as a conventional straight hole structure, and the upper sealing component 300 and the lower sealing component 400 are designed as simple structures, the access port 101 can be sealed. Thus, the above-mentioned floor access port structure 10 is applicable to sealing access ports 101 with special structures on the floor 100, solving the problem that existing floor 100 sealing covers of suitable size cannot be used to seal access ports 101 with special structures. For example, it solves the problem that the access port 101 opened on the curved floor 100 in the above embodiment cannot be fitted with a standard flat sealing cover. Furthermore, the upper sealing assembly 300 and the lower sealing assembly 400 form a double seal, ensuring reliable sealing and a good sealing effect. This solves the problem of poor sealing performance in the existing floor access port structure 10, which leads to water and dust ingress at the vehicle wheel wells. Moreover, the aforementioned floor access port structure 10 has a simple structure and is easy to disassemble, solving the problem of inconvenient installation of existing sealing covers.
[0052] It should be noted that the above-mentioned floor access panel structure 10 is not limited to a curved structure of floor 100, but can also be a flat structure of floor 100, and there is no particular limitation here.
[0053] The following is combined Figure 7 and Figure 8 The procedure for disassembling the upper sealing assembly 300 and the lower sealing assembly 400 to open the access port 101 for maintenance is explained, as well as the procedure for reinstalling the upper sealing assembly 300 and the lower sealing assembly 400 to close the access port 101 after maintenance is completed.
[0054] First, such as Figure 7 As shown, when it is necessary to disassemble the upper sealing assembly 300 and the lower sealing assembly 400 to open the access port 101 for maintenance:
[0055] First, unscrew the fasteners securing the upper sealing assembly 300 and then remove the upper sealing assembly 300;
[0056] The second step is to remove the 500 soundproofing component.
[0057] Third step, after unscrewing the fasteners that secure the lower sealing assembly 400, remove the sealing assembly 400 so that the inspection port 101 is fully opened;
[0058] The fourth step is to perform routine maintenance on components such as airbags and shock absorbers located under the floor 100.
[0059] Then, as Figure 8 As shown, when the upper sealing assembly 300 and the lower sealing assembly 400 need to be installed to close the access port 101 after maintenance is completed:
[0060] First, install the lower sealing assembly 400, ensuring that the lower sealing gasket 420 and the second flange 204 of the inspection cylinder 200 are tightly fitted. Use fasteners to secure the lower sealing assembly 400 to the lower end of the inspection cylinder 200 to seal the lower end opening of the inspection cylinder 200.
[0061] The second step is to place the soundproofing component 500 into the inspection cylinder 200;
[0062] The third step is to install the upper sealing assembly 300, ensuring that the upper sealing gasket 320 is in close contact with the upper end face of the inspection cylinder 200 and the upper surface of the floor 100. Use fasteners to secure the upper sealing assembly 300 to the upper end of the inspection cylinder 200 to close the upper opening of the inspection cylinder 200, thereby completing the installation of the upper sealing assembly 300 and the lower sealing assembly 400.
[0063] Finally, it should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A floor access panel structure, characterized in that, include: The floor is arc-shaped and has access ports that extend through its upper and lower sides; An inspection cylinder is coaxially inserted into the inspection port and fits against the inner wall of the inspection port. The upper and lower ends of the inspection cylinder have interconnected openings. The lower end face of the inspection cylinder is flush with the lower surface of the floor. An upper sealing assembly is installed at the upper end of the inspection cylinder and seals the upper opening of the inspection cylinder; A lower sealing assembly is installed at the lower end of the inspection cylinder and seals the lower opening of the inspection cylinder; The floor includes a body and a floor mat laid on the upper surface of the body. The floor mat has a first through hole extending through its upper and lower sides. The body has a second through hole extending through its upper and lower sides. The first through hole and the second through hole are interconnected and together form the inspection port. The diameter of the first through hole is larger than the diameter of the second through hole, so as to form a first step at the upper end of the inspection port. The upper end of the inspection cylinder has a first flange that surrounds the central axis of the inspection cylinder and extends outward along the radial direction of the inspection cylinder. The first flange overlaps the first step, and the upper side of the first flange is flush with the upper surface of the floor.
2. The floor access panel structure according to claim 1, characterized in that, The main body includes an upper sealing plate, a lower sealing plate, and a filling layer. The upper sealing plate and the lower sealing plate together enclose a closed space, and the filling layer fills the closed space.
3. The floor access panel structure according to claim 1, characterized in that, The upper sealing assembly includes an upper sealing cover and an upper sealing gasket. The upper sealing cover is attached to the floor, and the upper sealing gasket is bonded to the lower surface of the upper sealing cover.
4. The floor access panel structure according to claim 1, characterized in that, The upper end of the inspection cylinder is provided with a first mounting hole, and the bottom wall of the first mounting hole is provided with a second mounting hole that penetrates the bottom wall. The first mounting hole and the second mounting hole together form a second flange. The second flange surrounds the central axis of the inspection cylinder and extends inward along the radial direction of the inspection cylinder, and the lower side of the second flange is flush with the lower surface of the floor.
5. The floor access panel structure according to claim 4, characterized in that, The upper sealing assembly has a second step surrounding the central axis of the access port. The second step has a first abutting surface and a second abutting surface. The first abutting surface abuts against the upper end face of the access cylinder and a portion of the upper surface of the floor. The second abutting surface fits against the inner wall of the first mounting hole.
6. The floor access panel structure according to claim 4, characterized in that, The lower sealing assembly has a third step surrounding the central axis of the access port. The third step has a third abutting surface and a fourth abutting surface. The third abutting surface abuts against the bottom wall of the first mounting hole, and the fourth abutting surface fits against the inner side wall of the second mounting hole. The lower side of the lower sealing assembly is flush with the lower surface of the floor and the lower end face of the access cylinder.
7. The floor access panel structure according to claim 4, characterized in that, The lower sealing assembly includes a lower sealing cover and a lower sealing gasket. The lower sealing gasket is adhered to the lower surface of the lower sealing cover, and the lower sealing cover and the lower sealing gasket are fastened to the upper surface of the second flange by fasteners.
8. The floor access panel structure according to claim 1, characterized in that, The floor access panel structure also includes a sound insulation component. The upper sealing component and the lower sealing component are spaced apart in the vertical direction and form a mounting position. The sound insulation component is filled in the mounting position.
9. The floor access panel structure according to claim 1, characterized in that, The access panel extends vertically through the floor, and the inner wall of the access panel is perpendicular to a horizontal plane.
10. A vehicle, characterized in that, The vehicle includes a carriage, the bottom of which has a floor access structure as described in any one of claims 1-9, the upper side of which faces the interior of the carriage and the lower side of which faces the exterior of the carriage.