Mounting seat and rail vehicle body

Abstract

This utility model provides a mounting base and a rail vehicle body, relating to the fields of emergency unlocking device installation technology and rail vehicle body design technology. It is suitable for installing an external emergency unlocking device at the emergency unlocking opening on the side wall of a rail vehicle body. The mounting base includes an overlapping panel, the edge of which forms a first step recessed from the outer surface of the overlapping panel. The first step is suitable for overlapping the inner side of the side wall panel at the emergency unlocking opening of the side wall of the vehicle body. An installation opening is formed on the overlapping panel, and the outer periphery of the installation opening forms a second step recessed inward. The second step is suitable for overlapping the inner side of the mounting base of the external emergency unlocking device, so that the outer surface of the overlapping panel, the outer surface of the side wall panel, and the outer surface of the mounting base remain flush.

Description

Technical Field

[0001] This utility model relates to the field of emergency unlocking device installation technology and rail vehicle body design technology, and more specifically, to a mounting base and a rail vehicle body. Background Technology

[0002] In the design of rail vehicle bodies, the external emergency unlocking device is a crucial component for ensuring operational safety. Currently, the common installation method involves directly drilling mounting holes in the side wall panels of the vehicle body and riveting fasteners such as hexagonal rivets, then fixing the external emergency unlocking device to these fasteners with bolts. While this traditional installation method is structurally simple, it has significant drawbacks in practical application. First, on the outside of the vehicle body, due to the lack of a mounting structure, the external emergency unlocking device protrudes directly from the surface, not only disrupting the overall aesthetic appeal of the vehicle's streamlined appearance but also potentially generating additional aerodynamic noise during vehicle operation. Second, on the inside of the vehicle body, the mounting holes directly lead to the cavities of the side wall aluminum profiles, leaving the cavities in an open state, making effective sealing difficult. This not only affects the aesthetics of the vehicle's interior but also poses a potential adverse impact on the airtightness and structural strength of the vehicle body.

[0003] Therefore, there is a lack of a dedicated mounting bracket in the existing technology that can install the external emergency unlocking device flush with the side wall of the vehicle body while ensuring good sealing and structural strength of the vehicle body. Utility Model Content

[0004] In view of this, the present invention provides a mounting base and a rail vehicle body.

[0005] One aspect of this utility model provides a mounting base suitable for installing an external emergency unlocking device to an emergency unlocking opening on the side wall of a rail vehicle. The base is characterized by comprising an overlapping panel, the edge of which forms a first step recessed inward from its outer surface, the first step being adapted to overlap the inner side of the side wall panel of the side wall at the emergency unlocking opening; a mounting opening is formed on the overlapping panel, the outer periphery of which forms a second step recessed inward, the second step being adapted to overlap the inner side of a mounting base for the external emergency unlocking device, such that the outer surface of the overlapping panel, the outer surface of the side wall panel, and the outer surface of the mounting base remain flush.

[0006] According to an embodiment of the present invention, the recess depth of the first step portion is equal to the thickness of the side wall plate.

[0007] According to an embodiment of the present invention, the first step portion is connected to the side wall plate by welding.

[0008] According to an embodiment of the present invention, the recess depth of the second step is equal to the thickness of the mounting base.

[0009] According to an embodiment of the present invention, the aforementioned overlapping panel further includes a plurality of connection interfaces, which are arranged circumferentially along the mounting opening on the second step portion, and are suitable for cooperating with fasteners to fix the aforementioned external emergency unlocking device.

[0010] According to an embodiment of the present invention, the connection interface includes a rivet nut disposed within the second step portion.

[0011] According to an embodiment of the present invention, a sleeve is also included, which is disposed on the inner side of the overlapping panel and forms a space with the overlapping panel to accommodate the transmission component of the external emergency unlocking device.

[0012] According to an embodiment of the present invention, the first end of the sleeve is sealed to the overlapping panel, and the second end of the sleeve is sealed to the frame profile of the vehicle body side wall.

[0013] According to an embodiment of the present invention, the second end of the sleeve is flush with or extends out of the inner surface of the vehicle body side wall.

[0014] Another aspect of this utility model provides a rail vehicle body, including a side wall of the body, wherein the side wall of the body is provided with an emergency unlocking opening; and a mounting seat as described above, wherein the mounting seat is embedded in the emergency unlocking opening of the side wall of the body.

[0015] According to an embodiment of this utility model, the overlapping panel is provided with a first step and a second step to form an embedded mounting base. This at least partially overcomes the technical problems in the prior art, such as the unsightly appearance and aerodynamic performance caused by the external emergency unlocking device protruding directly onto the surface of the vehicle side wall, and the poor sealing and weakened structural strength caused by the side wall panel opening directly penetrating the vehicle body cavity. This achieves the goal of making the outer surface of the external emergency unlocking device smooth and flush with the outer surface of the vehicle side wall, significantly improving the overall appearance and aesthetics of the vehicle. Through the reliable overlap between the mounting base and the side wall panel, the continuity and structural strength of the vehicle side wall are effectively restored, improving the airtightness and sound insulation performance of the vehicle body. Attached Figure Description

[0016] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0017] Figure 1 The diagram schematically shows a front view of the mounting base according to an embodiment of the present invention;

[0018] Figure 2 A schematic cross-sectional view of the mounting base according to an embodiment of the present invention is shown;

[0019] Figure 3 A schematic cross-sectional view of the mounting base in an assembled state according to an embodiment of the present invention is shown.

[0020] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0021] 1. Overlapping panels;

[0022] 11. First step section;

[0023] 12. Installation port;

[0024] 13. The second step;

[0025] 14. Connection interface;

[0026] 2. Sleeve;

[0027] 3. External emergency unlocking device;

[0028] 31. Install the base;

[0029] 4. Side walls of the vehicle body;

[0030] 41. Side wall panels;

[0031] 5. Fasteners. Detailed Implementation

[0032] The embodiments of the present invention will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, numerous specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising”, “including”, etc., as used herein indicate the presence of the above-described features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0034] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0035] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0036] In existing rail vehicles, the external emergency unlocking device is typically installed by directly fixing it to the side wall panel of the car body. Specifically, mounting holes are made in the side wall panel, and fasteners such as hexagonal rivets are installed. The external emergency unlocking device is then secured to these fasteners. While this traditional installation method is simple in structure, it has significant drawbacks. First, on the outside of the car body, due to the lack of an effective embedded mounting structure, the mounting base of the external emergency unlocking device protrudes directly from the outer surface of the car body, not only disrupting the overall aesthetic appeal of the car body's streamlined appearance but also potentially generating additional aerodynamic noise and wind resistance during vehicle operation. Second, on the inside of the car body, the mounting holes penetrate directly through the car body skin and lead to the cavity of the internal aluminum profile frame, resulting in a completely open cavity. This affects the visual neatness and aesthetics of the car body's interior; more seriously, it compromises the car body's required airtightness and watertightness, posing a potential adverse impact on the car body's sound insulation, heat insulation performance, and structural strength.

[0037] Figure 1 The diagram schematically shows a front view of the mounting base according to an embodiment of the present invention; Figure 2 A schematic cross-sectional view of the mounting base according to an embodiment of the present invention is shown; Figure 3 A schematic cross-sectional view of the mounting base in an assembled state according to an embodiment of the present invention is shown.

[0038] An embodiment of this utility model provides a mounting base suitable for installing the external emergency unlocking device 3 onto the emergency unlocking opening of the side wall 4 of a rail vehicle, such as... Figures 1 to 3 As shown, the device includes an overlapping panel 1, the edge of which forms a first step portion 11 recessed inward from the outer surface of the overlapping panel 1. The first step portion 11 is adapted to overlap the inner side of the side wall plate 41 of the vehicle body side wall 4 at the emergency unlocking opening. An mounting opening 12 is formed on the overlapping panel 1, and a second step portion 13 recessed inward is formed on the outer periphery of the mounting opening 12. The second step portion 13 is adapted to overlap the inner side of the mounting base 31 of the external emergency unlocking device 3, so that the outer surface of the overlapping panel 1, the outer surface of the side wall plate 41 and the outer surface of the mounting base 31 remain flush.

[0039] According to the above configuration, an embedded mounting base is constructed through the overlapping panel 1 and the first step 11 and second step 13 formed on the overlapping panel 1. This not only achieves perfect flushing of the outer surfaces of the external emergency unlocking device 3, the mounting base, and the car body side wall 4 through the overlapping fit, completely eliminating the negative impact of the mounting base 31 of the external emergency unlocking device 3 protruding from the car body side wall 4 on the appearance and aerodynamic performance of the rail vehicle, but also effectively distributes and transfers the load of the external emergency unlocking device to the side wall panel 41, enhancing the local structural strength. Simultaneously, the continuous overlapping interface formed by this design provides a basic structure for applying welding or sealing connections, thereby constructing a reliable sealing barrier on both the inner and outer sides of the car body. This fundamentally solves the problem of open skeleton cavities and sealing failures inside the car body side wall 4 caused by existing external emergency unlocking device installation methods, significantly improving the overall aesthetics, structural stability, and sealing performance of the car body.

[0040] In one illustrative embodiment, such as Figure 3 As shown, the depth of the recess in the first step 11 is equal to the thickness of the side wall plate 41.

[0041] Specifically, combined Figures 1 to 3 As shown, the contour of the recessed area of ​​the first step portion 11 matches the contour of the emergency unlocking opening on the side wall panel 41 of the vehicle body side wall 4, but is slightly smaller in size so that the first step portion 11 can precisely overlap the inner side of the side wall panel 41. At this time, the outer surface of the overlapping panel 1 protrudes from the emergency unlocking opening, and by setting the recessed depth of the first step portion 11 to be equal to the thickness of the side wall panel 41, it is ensured that when the first step portion 11 overlaps the inner side of the side wall panel 41, the outer surface of the overlapping panel 1 can naturally achieve a flush state with the outer surface of the side wall panel 41. This provides a key dimensional guarantee for achieving a smooth vehicle body appearance, simplifies the installation and debugging process, and enables seamless connection between the overlapping panel 1 and the side wall panel 41; at the same time, it also enables seamless connection between the overlapping panel 1 and the side wall panel 41, creating ideal conditions for subsequent welding and sealing treatment, thus laying a solid foundation for achieving a high level of sealing performance and mechanical strength in the overall structure.

[0042] In one illustrative embodiment, the first step portion 11 is connected to the side wall panel 41 by welding.

[0043] According to an embodiment of the present invention, the first step portion 11 and the side wall plate 41 can be welded continuously around the lap contact surface of the first step portion 11 and the side wall plate 41 using advanced welding processes suitable for aluminum alloy vehicle bodies, such as laser welding, argon arc welding or cold metal transfer welding, to form a permanent sealing weld that can completely isolate the external environment and meet the airtightness requirements of the vehicle body.

[0044] In some embodiments, in addition to welding, considering the needs of different scenarios in rail vehicle manufacturing, such as ease of later maintenance and replacement, or suitability for specific material combinations, the connection between the first step portion 11 and the side wall plate 41 can also be achieved through a combination of adhesive and mechanical fastening. Firstly, high-strength automotive sealant or epoxy resin structural adhesive is applied to the overlap interface between the first step portion 11 and the side wall plate 41 to achieve initial bonding and sealing. Then, mechanical fasteners such as self-tapping screws or pop rivets are used for auxiliary fixing from the inside of the vehicle body. This method provides convenience for disassembly while ensuring sealing.

[0045] In some embodiments, an elastic hook or protrusion structure is designed on the outer wall of the first step portion 11, and a corresponding slot or limiting hole is pre-set at the opening edge of the side wall plate 41. During installation, pressure is applied to cause the buckle structure to elastically deform and then quickly rebound to lock, achieving rapid installation and locking.

[0046] In one illustrative embodiment, such as Figure 3 As shown, the depth of the recess in the second step 13 is equal to the thickness of the mounting base 31.

[0047] Combination Figure 3 As shown, the recess depth of the second step portion 13 is set to be equal to the thickness of the mounting base 31 of the external emergency unlocking device 3, ensuring that when the mounting base 31 is embedded and overlaps the second step portion 13, the outer surface of the mounting base 31 is strictly flush with the outer surface of the overlapping panel 1. Thus, in the final assembled state, the external emergency unlocking device 3 is flush with the appearance of the vehicle body side wall 4. This not only eliminates the abrupt difference between the components and ensures the integrity of the streamlined outer surface of the vehicle body, but also creates ideal conditions for effective sealing treatment, such as applying sealant or gaskets, at the joint interface between the second step portion 13 and the mounting base 31. Ultimately, they together form a beautiful, continuous, and reliably sealed installation structure.

[0048] In one illustrative embodiment, such as Figures 1 to 3 As shown, the overlapping panel 1 also includes a plurality of connection interfaces 14, which are arranged circumferentially along the mounting opening 12 on the second step portion 13, and are suitable for cooperating with the fastener 5 to fix the external emergency unlocking device 3.

[0049] According to the above arrangement, by setting multiple connection interfaces 14 along the circumference of the mounting opening 12 on the second step 13, a uniform and stable stress-bearing structure is constructed. This effectively distributes the loads borne by the external emergency unlocking device 3, such as operating forces and vibrations, to the overall frame of the overlapping panel 1, avoiding stress concentration and significantly improving the reliability of the connection and the structural rigidity of the mounting point. Simultaneously, this circumferential arrangement provides the device with precise positioning and reliable torsional resistance, ensuring the stability of the installation.

[0050] Specifically, such as Figure 1 As shown, the multiple connection interfaces 14 are preferably distributed evenly and symmetrically around the central axis of the mounting port 12, for example, four interfaces are provided at a 90-degree angle to maximize the uniformity of load distribution.

[0051] In one specific embodiment, the connection interface 14 may be an internal threaded hole machined on the body of the second step portion 13, which is tightened by screwing the fastener 5 into the mounting base 31 side of the external emergency unlocking device 3.

[0052] In one illustrative embodiment, the connection interface 14 includes a rivet nut disposed within the second step portion 13.

[0053] Specifically, the above-mentioned setup, by embedding high-strength internally threaded fasteners, namely rivet nuts, inside the overlapping panel 1, greatly enhances the strength, durability, and wear resistance of the threaded holes, perfectly solving the technical problems of insufficient threaded connection strength and easy stripping in thin plate structures. At the same time, the rivet nut installation process is mature, facilitating automated production and effectively improving production efficiency and the consistency of connection quality.

[0054] In some embodiments, the materials for each part of the overlapping panel 1 can be selected according to the specific load-bearing strength requirements of the vehicle body. Specifically, the main body of the overlapping panel 1 can be made of extruded aluminum alloy profiles to ensure its compatibility with the main material of the vehicle body sidewall 4 and its weldability. The first step portion 11 and the second step portion 13, as key load-bearing areas, can undergo local solution heat treatment to improve their yield strength. For the outer surface of the overlapping panel 1, an anodizing treatment can be applied to form a protective layer, or a powder coating can be applied to the entire overlapping panel 1 to improve corrosion resistance and weather protection.

[0055] Through the targeted design of the aforementioned materials and processes, the mounting base not only achieves basic connection functions but also further meets the core requirements of rail vehicles for lightweighting, durability, and maintenance economy, forming a reliability solution that matches the vehicle's life cycle.

[0056] In one illustrative embodiment, such as Figure 2 and Figure 3 As shown, the mounting base also includes a sleeve 2, which is disposed on the inner side of the overlapping panel 1 and forms a space with the overlapping panel 1 to accommodate the transmission components of the external emergency unlocking device 3.

[0057] According to the above configuration, the sleeve 2 and the overlapping panel 1 cooperate to create an independent space for housing and protecting the core transmission components of the external emergency unlocking device 3. On the one hand, the transmission components are confined within a specific space, effectively preventing them from getting tangled or interfering with the complex cables and equipment inside the vehicle, ensuring the neatness and safety of the internal layout; on the other hand, the sleeve 2 and the overlapping panel 1 together form a rigidly connected whole, which can smoothly and efficiently transmit and distribute the force generated when operating the external emergency unlocking device 3 to the side wall 4 of the vehicle body, enhancing the structural rigidity and reliability of the installation point.

[0058] In one illustrative embodiment, the first end of the sleeve 2 is sealed to the overlapping panel 1, and the second end of the sleeve 2 is sealed to the frame profile of the vehicle body side wall 4.

[0059] According to the above configuration, the two ends of the sleeve 2 are sealed to the frame profile of the overlapping panel 1 and the side wall 4 of the car body, respectively. This not only completely isolates the transmission components of the external emergency unlocking device 3 from the internal environment of the side wall 4 of the car body, effectively preventing the intrusion of external media such as dust and moisture, and ensuring the reliability and durability of the transmission components, but also rebuilds a continuous and complete sealing system at the emergency unlocking opening of the side wall 4 of the car body. This completely solves the problem of the airtightness and sound insulation performance of the car body being damaged by the traditional installation method, and significantly improves the overall performance of the rail vehicle.

[0060] In some embodiments, the connection between the first end of the sleeve 2 and the inner side of the overlapping panel 1 can be achieved by welding. Specifically, welding processes suitable for aluminum alloys, such as laser welding, argon arc welding, or cold metal transfer welding, can be used to continuously weld around the contact area between the first end of the sleeve 2 and the overlapping panel 1. Alternatively, a combination of adhesive and mechanical bonding can be used. First, a high-strength automotive sealant (such as polysulfide sealant or silicone sealant) is applied along the contact surface to achieve initial sealing and bonding. Subsequently, mechanical reinforcement can be achieved by riveting or screwing. This method provides a certain degree of vibration reduction and maintainability while ensuring sealing.

[0061] In some embodiments, the connection between the second end of the sleeve 2 and the internal frame profile of the vehicle body side wall 4 can be achieved using sealant, which is the most common and flexible sealing method. Sealant (such as the aforementioned automotive sealant: polysulfide sealant or silicone sealant, etc.) is applied to the contact area between the end face or outer wall of the second end of the sleeve 2 and the frame profile to form an elastic sealing layer. Alternatively, welding can be used; where structural space permits and the highest structural strength and sealing level are desired, the second end of the sleeve can be fixed to the frame profile using intermittent or continuous welding.

[0062] In some embodiments, a flange is provided at the second end of the sleeve 2, and the flange is connected to the corresponding mounting structure on the frame profile by bolts or rivets, and a rubber sealing gasket is clamped between the two to facilitate installation and subsequent maintenance and disassembly.

[0063] In one illustrative embodiment, such as Figure 3 As shown, the second end of the sleeve 2 is flush with or extends beyond the inner surface of the side wall 4 of the vehicle body.

[0064] Combination Figure 3 As shown, when the second end of the sleeve 2 is flush with the inner surface of the side wall 4 of the vehicle body, it is convenient to achieve a smooth connection with the interior trim panel or other internal components of the vehicle body, thus optimizing the internal space layout. When the second end of the sleeve 2 extends and protrudes from the inner surface of the side wall 4 of the vehicle body, it provides a larger operating and maintenance space for the transmission components, while increasing the connection area between the sleeve 2 and the frame profile of the side wall 4 of the vehicle body, making it easier to implement more reliable welding or sealing treatment, and further enhancing the stability and sealing effect of the overall structure.

[0065] It should be noted that the external emergency unlocking device 3 typically includes a mounting base 31 as the mounting reference and a transmission component for performing the unlocking function. The mounting base 31 is the fixed part of the device, usually a flange or similar structure, with mounting holes corresponding to the connection interface 14 on the second step portion 13 of the mounting base, for mechanical connection and fixation via fasteners 5. The transmission component refers to the mechanical assembly extending inward from the mounting base 31 for transmitting operating force. Specifically, it can be a drive shaft, worm gear mechanism, or a linkage or wire rope traction mechanism connected to the door locking mechanism that runs through the device. When operated from outside the vehicle using a special key, torque is transmitted through the transmission component, ultimately triggering the release of the door locking mechanism.

[0066] The mounting base provided by this utility model has a accommodating space designed to accommodate and protect at least part of the structure of this transmission component (such as a square shaft or worm gear box), ensuring that its movement is not interfered with, and effectively distributing the operating load from the mounting base 31 to the vehicle body structure.

[0067] An embodiment of this utility model also provides a rail vehicle body, including a side wall 4 of the body, the side wall 4 of the body being provided with an emergency unlocking opening; the aforementioned mounting seat is embedded in the emergency unlocking opening of the side wall 4 of the body.

[0068] Specifically, the overlapping panel 1 of the mounting base overlaps and is fixed to the inner side of the side wall plate 41 at the emergency unlocking opening via its first step 11. The first step 11 and the side wall plate 41 are permanently fixed and airtightly sealed through continuous circumferential welding, ensuring that the mounting base and the vehicle side wall 4 form an integrated rigid structure. The second end of the sleeve 2 of the mounting base is connected to the internal frame profile of the vehicle side wall 4. The end face of the second end of the sleeve 2 is flush with the inner surface of the frame profile 42, and a reliable seal and fixation are achieved through a combination of segmented welding and sealant, thus forming a closed force transmission path and sealed space inside the vehicle body. The external emergency unlocking device 3 is embedded in the second step 13 of the mounting base via its mounting base 31 and is locked in place by fasteners 5. After installation, the outer surface of the mounting base 31 of the external emergency unlocking device 3, the outer surface of the overlapping panel 1, and the outer surface of the side wall plate 41 of the vehicle side wall 4 together constitute a complete and smooth outer surface of the vehicle body.

[0069] The rail vehicle body of this utility model, by adopting the above-mentioned embedded structure mounting seat, not only achieves flush and aesthetic installation of the external emergency unlocking device 3 with the outer surface of the car body, but also significantly improves the sealing performance and structural strength of the car body opening, and can be widely used in various rail vehicles such as subways, EMUs, and high-speed trains.

[0070] The embodiments of this utility model have been described above. However, these embodiments are merely illustrative and not intended to limit the scope of this utility model. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Without departing from the scope of this utility model, those skilled in the art can make various substitutions and modifications, all of which should fall within the scope of this utility model.

Claims

1. A mounting base suitable for mounting an external emergency unlocking device (3) to an emergency unlocking opening in the side wall (4) of a rail vehicle, characterized in that, include: An overlapping panel (1) is formed at the edge of which a first step portion (11) is recessed inward from the outer surface of the overlapping panel (1). The first step portion (11) is adapted to overlap the inner side of the side wall panel (41) at the emergency unlocking opening of the vehicle body side wall (4). An mounting opening (12) is formed on the overlapping panel (1). A second step portion (13) is formed inwardly recessed at the outer periphery of the mounting opening (12). The second step portion (13) is adapted to overlap the inner side of the mounting base (31) of the external emergency unlocking device (3), so that the outer surface of the overlapping panel (1), the outer surface of the side wall panel (41), and the outer surface of the mounting base (31) remain flush.

2. The mount of claim 1, wherein The depth of the recess in the first step (11) is equal to the thickness of the side wall plate (41).

3. The mount of claim 2, wherein The first step (11) is connected to the side wall plate (41) by welding.

4. The mounting base according to claim 1, characterized in that, The depth of the recess in the second step (13) is equal to the thickness of the mounting base (31).

5. The mount of claim 1, wherein The overlapping panel (1) also includes a plurality of connection interfaces (14), which are arranged circumferentially along the mounting port (12) on the second step portion (13) and are suitable for cooperating with fasteners (5) to fix the external emergency unlocking device (3).

6. The mounting base according to claim 5, characterized in that, The connection interface (14) includes a rivet nut disposed within the second step portion (13).

7. The mount of claim 1, wherein It also includes a sleeve (2), which is disposed on the inner side of the overlapping panel (1) and forms a space with the overlapping panel (1) to accommodate the transmission component of the external emergency unlocking device (3).

8. The mount of claim 7, wherein, The first end of the sleeve (2) is sealed to the overlapping panel (1), and the second end of the sleeve (2) is sealed to the frame profile of the vehicle body side wall (4).

9. The mounting base according to claim 7, characterized in that, The second end of the sleeve (2) is flush with or extends out of the inner surface of the vehicle body side wall (4).

10. A rail vehicle body, characterized in that, include: The vehicle body side wall (4) is provided with an emergency unlocking opening; The mounting base as described in any one of claims 1-9 is embedded in the emergency unlocking opening of the side wall (4) of the vehicle body.

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