Pedal device and railway vehicle

Abstract

The embodiment of the invention provides a pedal device and a railway vehicle. According to the pedal device, a pedal mounting plate is arranged below a door frame on the outer side of a vehicle body and fixed to a boundary beam on the lower portion of the vehicle body; the section of the front end structure of the pedal is in a right triangle shape and is a non-equilateral triangle. The plane where one right-angle side is located is detachably and fixedly connected with the pedal mounting plate, and the plane where the other right-angle side is located is used for passengers to get on and off; different right-angle sides are arranged as supporting surfaces for passengers to get on and off, and the compensation distance is adjusted to be suitable for different platform limits; the front-end plugging pieces are arranged at the two ends of the pedal front-end structure in the length direction respectively, the cavity structure of the pedal front-end structure serves as a crushing weak point when being impacted and is convenient to disassemble and replace, transverse impact force transmitted to a train body by the pedal is further weakened, and the front-end plugging pieces have the energy absorption function under the train station crossing condition. And the connecting position of the vehicle body is not affected, and rapid replacement can be achieved.

Description

Technical Field

[0001] This application relates to the field of rail vehicle technology, specifically to a pedal device and a rail vehicle. Background Technology

[0002] Low-floor trams have a floor only 35 centimeters above the rails, eliminating the need for platforms. They have a large passenger capacity, can be installed on existing urban roads, and are cost-effective, energy-efficient, environmentally friendly, and quiet, making them one of the world's most advanced urban transportation systems. In recent years, low-floor trams have experienced rapid development as a new type of modern urban transportation equipment, and have been widely adopted in emerging cities, branch lines of large cities, and small and medium-sized cities in my country.

[0003] Compared to subway cars, low-floor cars offer greater flexibility in operating routes based on urban construction characteristics, and the gap between the platform and the car door should not be too close. To meet the European TSI1300 standard requirement that the horizontal gap between the platform and the door edge should not exceed 60mm, platform compensation devices are required to facilitate access for disabled passengers. To avoid excessive costs and improve reliability, electric or pneumatic platform compensation devices are generally not chosen for low-floor cars. Common designs typically include a manually operated flip-up bridging plate for dedicated access for disabled passengers, requiring operation by the train attendant. For cars without attendants, permanently fixed external steps are preferred.

[0004] If a rubber support step is installed below the car door, a single piece of rubber is directly mounted to the front of the car body. The step is made of rubber, which needs to be sufficiently hard, square in shape, and solid. It is heavy, cannot be adjusted for compensation distance, and is not suitable for different platform clearances. Summary of the Invention

[0005] This application provides a pedal device and a rail vehicle to solve the problem that existing external pedals cannot adjust the compensation distance and are not suitable for different platform clearances.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A pedal device, comprising:

[0008] The pedal mounting plate is located below the door frame on the outside of the vehicle body and is used for a detachable and fixed connection with the lower side beam of the vehicle body.

[0009] The front end structure of the pedal has a cross-section in the shape of a right triangle. One of the two right-angled sides of the right triangle can be detachably and fixedly connected to the pedal mounting plate, while the other side is used for passengers to get on and off the vehicle. The right triangle is an scalene triangle.

[0010] The front sealing components are located at both ends of the front end structure of the pedal along its length and are detachably and fixedly connected to the front end structure of the pedal.

[0011] Optionally, the front sealing member is a closed shell with an opening on one side. The closed shell is provided with a horizontal extension plate and a vertical extension plate extending to the outside of the opening. The horizontal extension plate and the vertical extension plate are respectively provided with sealing installation holes.

[0012] The horizontal extension plate and the vertical extension plate are inserted into the cavity of the front end structure of the pedal, and are fixed to the plane of the two right-angled sides of the front end structure of the pedal respectively through the sealing mounting hole and the threaded fastener.

[0013] Optionally, the front-end sealing component includes:

[0014] A closed cylinder with a right-angled triangular cross-section and a sealing cap located at one axial end of the closed cylinder are integrally formed;

[0015] The horizontal extension plate and the vertical extension plate are fixed to the inner surface of the sealing cover.

[0016] Optionally, the sealing cap is a smooth curved surface that extends from the right-angled vertex of the right-angled triangle to the hypotenuse of the right-angled triangle and is concave inward.

[0017] Optionally, the hypotenuse of the right triangle is a smooth curve that curves outward.

[0018] Optionally, it also includes:

[0019] A pad is fixed between the front end structure of the pedal and the pedal mounting plate along the width direction of the vehicle. The pad extends along the length direction of the vehicle and its top is flush with the top of the front end structure of the pedal.

[0020] Optionally, the cross-section of the pedal mounting plate is Z-shaped, comprising two parallel first vertical plates and second vertical plates, and a horizontal plate connecting the bottom end of the first vertical plate and the top end of the second vertical plate, wherein the horizontal plate is flush with the plane containing the other right-angle side of the pedal front end structure.

[0021] The first vertical plate is used to fix the lower side beam of the vehicle body, and the second vertical plate is used to fix the front end structure of the pedal.

[0022] Optionally, the first vertical plate is provided with a plurality of first mounting holes along its length for fixing to the lower side beam of the vehicle body.

[0023] Optionally, the second vertical plate has a weight-reducing groove that runs along its entire length on the inner surface opposite to the front end structure of the pedal;

[0024] The second vertical plate has several second mounting holes on its outer surface near the front end structure of the pedal for fixing to the front end structure of the pedal.

[0025] Optionally, the plane containing the two right-angled sides of the right triangle is provided with a plurality of pedal front mounting holes along the length direction; the pedal front mounting holes are provided corresponding to the second mounting holes;

[0026] The pedal front end structure and the pedal mounting plate are fixed by the pedal front end mounting hole, the second mounting hole and threaded fasteners.

[0027] Optionally, the plane containing the hypotenuse of the right triangle is provided with a clearance opening, which corresponds to the mounting hole at the front end of the pedal, to allow space for the installation of threaded fasteners and the mounting hole at the front end of the pedal.

[0028] This application also provides a rail vehicle, including a car body, a sliding door assembly, and a pedal device as described in any of the above embodiments. The sliding door assembly includes a sliding door leaf and a sliding door frame. The sliding door frame is arranged around the doorway of the door body, and the bottom of the sliding door frame is open, with stepped structures at both ends of the opening.

[0029] The pedal mounting plate of the pedal device has its two ends overlapping the step structure along its length, and the pedal mounting plate and the sliding door frame are in the same plane.

[0030] Optionally, the sliding door panel extends downward to the center of the first mounting hole of the pedal mounting plate;

[0031] The vehicle body also includes a lower side beam, and the pedal mounting plate is fixed to the lower side beam via the first mounting hole and threaded fasteners.

[0032] Optionally, the vehicle body further includes:

[0033] The door sill is located inside the vehicle body. The front end of the door sill is provided with a stepped glue injection groove, and a glue injection cavity is formed between the stepped glue injection groove and the inner surface of the sill mounting plate.

[0034] The bottom of the sliding door panel is provided with a sealing component that runs the entire length of the panel, and the sealing component is in close contact with the outer surface of the pedal mounting plate.

[0035] This application provides a pedal device, comprising: a pedal mounting plate located below the door frame on the outer side of the vehicle body, for detachable and fixed connection with the lower side beam of the vehicle body; a pedal front end structure having a right-angled triangle cross-section, wherein one of the two right-angled sides of the right-angled triangle is detachably and fixedly connected to the pedal mounting plate, and the other is used for passengers to get on and off the vehicle; the right-angled triangle is an unequal-sided triangle; and front end sealing members located at both ends of the pedal front end structure along its length direction and detachably and fixedly connected to the pedal front end structure.

[0036] The pedal device provided in this application embodiment has the following technical advantages compared to the prior art:

[0037] In this application, a pedal mounting plate is installed below the door frame on the outer side of the car body and fixed to the lower side beam of the car body; the front end structure of the pedal has a right-angled triangle cross section, which is not an equilateral triangle; one right-angled side is detachably fixed to the pedal mounting plate, and the other right-angled side is used for passenger boarding and alighting; by setting different right-angled sides as support surfaces for passenger boarding and alighting, the compensation distance is adjusted to make it suitable for different platform clearances; and front end sealing components are respectively installed at both ends of the length direction of the front end structure of the pedal. The cavity structure of the front end structure of the pedal serves as a weak point for crushing when impacted, and is easy to disassemble and replace, further reducing the lateral impact force transmitted from the pedal to the car body. The front end sealing component has an energy absorption function when the train passes the station, and has no impact on the connection position of the car body, and can be quickly replaced. Attached Figure Description

[0038] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0039] Figure 1 This is a schematic diagram of the structure of a pedal device provided in an embodiment of this application;

[0040] Figure 2 for Figure 1 A magnified schematic diagram of a local structure;

[0041] Figure 3 This is a schematic diagram of the front end structure of the pedal provided in an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of the structure of the pedal mounting plate provided in an embodiment of this application;

[0043] Figure 5 A schematic diagram of the pedal mounting plate from another perspective, provided for an embodiment of this application;

[0044] Figure 6This is a schematic diagram of the structure of the front-end sealing component provided in the embodiments of this application;

[0045] Figure 7 A schematic diagram of the front-end sealing component from another perspective, provided for an embodiment of this application;

[0046] Figure 8 This is a schematic diagram of the assembly structure of the front-end sealing component;

[0047] Figure 9 This is a schematic diagram of the assembly structure of the pedal device described in the embodiments of this application;

[0048] Figure 10 This is a cross-sectional view of the vehicle body at the door.

[0049] Figure 11 This is a diagram showing the state of the sliding door when it is closed.

[0050] The following labels are shown in the attached diagram:

[0051] 1. Pedal mounting plate; 2. Pedal front end structure; 3. Front end sealing component; 4. Pad; 5. Lower side beam of vehicle body; 6. Door pedal; 7.

[0052] First vertical plate 11, horizontal plate 12, second vertical plate 13, first mounting hole 111, weight reduction groove 121, second mounting hole 131;

[0053] Foot pedal front mounting hole 21, clearance opening 22;

[0054] Horizontal extension plate 31, vertical extension plate 32, closed cylinder 33, sealing cover 34;

[0055] 51. Sliding door leaf; 52. Sliding door frame; 53. Step structure; 54. Sealing component;

[0056] Injection cavity 71. Detailed Implementation

[0057] This invention discloses a pedal device and a rail vehicle to solve the problems that existing external pedals cannot adjust the compensation distance and are not suitable for different platform clearances.

[0058] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0059] Please see Figure 1-8 , Figure 1This is a schematic diagram of the structure of a pedal device provided in an embodiment of this application; Figure 2 for Figure 1 A magnified schematic diagram of a local structure; Figure 3 This is a schematic diagram of the front end structure of the pedal provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the pedal mounting plate provided in an embodiment of this application; Figure 5 A schematic diagram of the pedal mounting plate from another perspective, provided for an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the front-end sealing component provided in the embodiments of this application; Figure 7 A schematic diagram of the front-end sealing component from another perspective, provided for an embodiment of this application; Figure 8 This is a schematic diagram of the assembly structure of the front-end sealing component.

[0060] In one specific embodiment, the pedal device provided in this application is located on the outside of the vehicle body and includes a pedal mounting plate 1, a pedal front end structure 2, and a front end sealing member 3. The pedal mounting plate 1 serves as the basic load-bearing component of the pedal device and is located directly below the door frame on the outside of the vehicle body, typically below a sliding door, external door, or door. It is adjacent to the door opening area and is used to connect to the lower side beam 6 of the vehicle body. It can be detachably fixed by bolts or the like. The cross-section of the pedal front end structure 2 is a right-angled triangle, but not an equilateral triangle, so that the compensation distance can be adjusted by setting different right-angled sides as the support surface for passengers getting on and off the vehicle, making it suitable for different platform clearances. The plane containing one right-angled side of the right-angled triangle is detachably fixed to the pedal mounting plate 1. Its vertical side is connected to the pedal mounting plate 1, the horizontal side is used for passengers getting on and off the vehicle, and the inclined side forms a smooth and sloping transition slope. The inclined side serves as a weak point for crushing in the event of an impact, realizing the collision energy absorption of the vehicle in the width and length directions.

[0061] It is understood that the front end structure 2 of the pedal can be connected to the pedal mounting plate 1 through two right-angled side planes in different directions to adjust the extension distance of the pedal device along the width of the vehicle, use different platform clearances, and improve the versatility of the device; the right-angled side plane not used for installation serves as the functional surface for passengers to step on; the right-angled triangle is an unequal-sided triangle, and by selecting the plane containing the right-angled side of different lengths, the width of the tread can be increased and the compensation distance can be adjusted.

[0062] The front sealing component 3 is installed on both the left and right ends of the front structure 2 of the pedal and is detachably and fixedly connected to the front structure 2 of the pedal. It can be used to seal the internal cavity, improve the appearance integrity, and enhance the end strength. While ensuring aesthetics, the front sealing component 3 has energy absorption performance when the vehicle collides with the platform. If the main platform is irregular and the train passes the station at 40km / h, the front component will not affect the connection position of the car body after it is broken and can be quickly and easily replaced.

[0063] In another embodiment, specifically, the hypotenuse of the right triangle is a smooth curve that curves outward. The "hypotenuse" is the transition side connecting the vertical side and the horizontal side in the profile. Under the action of passenger gravity, it enhances the vertical support capacity and serves as a weak point that can be crushed in the event of an impact.

[0064] The pedal device provided in this application embodiment has the following technical advantages compared to the prior art:

[0065] In this application, a pedal mounting plate 1 is installed below the door frame on the outer side of the car body and fixed to the lower side beam 6 of the car body; the front end structure 2 of the pedal has a right-angled triangle cross section, which is not an equilateral triangle; one right-angled side is detachably fixed to the pedal mounting plate 1, and the other right-angled side is used for passengers to get on and off the train; by setting different right-angled sides as the support surface for passengers to get on and off the train, the compensation distance is adjusted to make it suitable for different platform clearances; and front end sealing parts 3 are respectively installed at both ends of the length direction of the front end structure 2 of the pedal. The cavity structure of the front end structure 2 of the pedal serves as a weak point for crushing when it is impacted, and is easy to disassemble and replace, further reducing the lateral impact force transmitted from the pedal to the car body. The front end sealing parts 3 have an energy absorption function when the train passes the station, and have no impact on the connection position of the car body, and can be quickly replaced.

[0066] In one optional embodiment, the pedal device is made of a metal profile, and the front end structure 2 of the pedal is a triangular hollow thin-walled aluminum profile structure, which replaces the rubber material to absorb the impact force in the vehicle width and length directions, crushing upon impact and avoiding damage to the vehicle body structure and mounting points; the aluminum profile is independently installed, requires no maintenance, is low in cost, lightweight, has a long service life, and is fully functional. Preferably, a 3-5mm thin-walled hollow structure is used, and an avoidance opening 22 is opened at the front end, which not only facilitates disassembly and replacement, but also further reduces the lateral impact force transmitted from the pedal to the vehicle body. For example, the material of the front end structure 2 of the pedal is EN AW-6063-T5.

[0067] In one embodiment, the pedal mounting plate 1 has a Z-shaped cross section, which includes two parallel first vertical plates 11 and second vertical plates 13, and a horizontal plate 12 connecting the bottom end of the first vertical plate 11 and the top end of the second vertical plate 13. The horizontal plate 12 is flush with the plane containing the other right-angle side of the pedal front end structure 2.

[0068] The first vertical plate 11 is used to fix the lower side beam 6 of the vehicle body, and the second vertical plate 13 is used to fix the front end structure 2 of the pedal.

[0069] The pedal mounting plate 1 extends along the length of the vehicle body and is a continuously bent metal component, such as an aluminum alloy profile. Its structure is compact and has a high space utilization rate, enabling staggered installation of different components. The first vertical plate 11 is fixed to the lower side beam 6 of the vehicle body as a load-bearing foundation, and the second vertical plate 13 is fixed to the front end structure 2 of the pedal. One end of the horizontal plate 12 is connected to the bottom of the first vertical plate 11, and the other end is connected to the top of the second vertical plate 13, thereby adapting to the structural layout of the vehicle body, avoiding installation interference, and providing additional support area to enhance overall rigidity. The top surface of the horizontal plate 12 is on the same horizontal plane or at the same height as the other of the two right-angled sides of the right triangle, thereby achieving a seamless transition. Passengers do not feel any steps when stepping on the pedal, preventing tripping. It has good visual continuity and structural synergy in bearing force. The horizontal plate 12 can assist in supporting the tread surface and share local loads.

[0070] In another embodiment, the first vertical plate 11 is provided with a plurality of first mounting holes 111 along its length for fixing to the lower side beam 6 of the vehicle body.

[0071] The first vertical plate 11 has several first mounting holes 111 arranged in the longitudinal extension direction, preferably three or more, for connecting to the bolt through holes or threaded holes of the lower side beam 6 of the vehicle body, thereby achieving multi-point fixing and improving connection rigidity and torsional resistance. For example, M6 screws.

[0072] In another embodiment, the inner surface of the second vertical plate 13 facing away from the pedal front end structure 2 has a continuous weight-reducing groove 121; the outer surface of the second vertical plate 13 near the pedal front end structure 2 has several second mounting holes 131 for fixing to the pedal front end structure 2. It is understood that the weight-reducing groove 121 on the surface of the second vertical plate 13 facing the vehicle body extends continuously along the entire length of the second vertical plate 13, preferably as a long strip groove or through groove, to remove excess material and reduce overall weight; simultaneously, the weight-reducing groove 121 is located on the inner surface of the non-connecting side, and does not affect the mounting rigidity of the outer surface. The side of the second vertical plate 13 facing the pedal front end structure 2 is the actual connecting surface, and the second mounting holes 131 are used for fixing to the pedal front end structure 2. There are multiple second mounting holes 131 to ensure that the pedal front end structure 2 is stable and does not loosen, and the load is transferred to the second vertical plate 13 through the outer surface. The second mounting holes 131 are also configured as threaded holes or bolt holes.

[0073] The mounting plate 1 has a profile thickness of 5-8mm, preferably 5mm. After installation, it fits snugly against the vehicle body, forming three discontinuous support surfaces. It is in direct, close contact with the vehicle body in the height direction, with an angle of nearly 90 degrees between the two directions, providing a flip-up support effect. It can be secured using only a single row of M6 countersunk screws. The pedal is calculated according to the strength requirements of EN14752:2015 4.2.2 for entrance steps, and can support the weight of at least three passengers for passenger and wheelchair access. The pedal collision simulation, assuming the vehicle passes a 200m curved platform at 40km / h, shows that even with the front end of the pedal shattered upon impact, the rear end connecting to the vehicle body exhibits only 0.061mm of plastic deformation. In the event of a pedal collision, only the front end component needs replacement, without affecting the vehicle itself.

[0074] Based on the above embodiments, a plurality of pedal front mounting holes 21 are provided along the length direction in the plane containing the two right-angled sides of the right triangle; the pedal front mounting holes 21 are correspondingly provided with the second mounting holes 131; the pedal front structure 2 and the pedal mounting plate 1 are fixed by the pedal front mounting holes 21, the second mounting holes 131 and threaded fasteners.

[0075] The two right-angled sides of the right triangle are each provided with a pedal front mounting hole 21. The pedal front mounting holes 21 are evenly arranged along the length of their respective planes, preferably three or more. When the mounting plate is connected with the "vertical side", the pedal front mounting hole 21 on the vertical side is used; when the mounting plate is connected with the "horizontal side", the pedal front mounting hole 21 on the horizontal side is used. This satisfies bidirectional installation compatibility: the same pedal front structure 2 can be used for different vehicle models and different installation directions; no parts need to be replaced, only the mounting surface needs to be changed to adapt to new working conditions; it is understood that regardless of which mounting surface is selected, the pedal front mounting hole 21 on it must be precisely aligned in space with the second mounting hole 131 on the mounting plate; a rigid connection is achieved by using threaded fasteners through the aligned holes; all connections are detachable, supporting maintenance and replacement.

[0076] In one alternative embodiment, the plane containing the hypotenuse of the right triangle is provided with a clearance opening 22, which corresponds to the mounting hole 21 at the front end of the pedal, thus allowing space for the installation of threaded fasteners and the mounting hole 21 at the front end of the pedal.

[0077] The plane of the inclined side of the pedal front end structure 2 is provided with a clearance opening 22, such as a partial opening or groove. The clearance opening 22 is aligned with a pedal front end mounting hole 21 in spatial position. When assembling from the inclined side, the tool can be inserted through the clearance opening 22 to contact the threaded fastener in the pedal front end mounting hole 21, realizing external operation and internal connection. No pre-assembly or disassembly of other parts is required, and the connection can be quickly completed on the vehicle assembly line, shortening the cycle time. In case of failure, the pedal front end structure 2 can be disassembled separately through the clearance opening 22 without affecting the overall structure.

[0078] In one optional embodiment, the front sealing member 3 is a closed shell with an opening on one side. The closed shell is provided with a horizontal extension plate 31 and a vertical extension plate 32 extending to the outside of the opening. The horizontal extension plate 31 and the vertical extension plate 32 are respectively provided with sealing mounting holes. The horizontal extension plate 31 and the vertical extension plate 32 are inserted into the cavity of the pedal front end structure 2 and are fixed to the planes of the two right-angled sides of the pedal front end structure 2 through the sealing mounting holes and threaded fasteners.

[0079] The closed housing has an overall enclosed box-shaped structure. One side opening is used to align with the pedal front end structure 2 during installation and allows the internal extension plate to be inserted into the cavity of the pedal front end structure 2, facilitating later disassembly and maintenance. Two metal plates extend outward from the opening of the closed housing: both extension plates have sealing mounting holes for fixing sealing components to the planes of the two right-angled sides of the pedal front end structure 2, specifically to the pedal front end mounting hole 21. The horizontal extension plate 31 corresponds to the horizontal right-angled side plane of the pedal front end structure 2; the vertical extension plate 32 corresponds to the vertical right-angled side plane of the pedal front end structure 2. The extension plates are located outside the opening, i.e., on the side facing the inside of the pedal front end structure 2. The horizontal and vertical extension plates 32 are inserted into the cavity of the pedal front end structure 2, preferably with a clearance fit, to achieve pre-positioning. The insertion depth can be set to 20-50mm to ensure guidance and initial fixation; achieving bidirectional positioning and connection; improving connection rigidity and preventing torsion or warping; and forming an "L-shaped" interlocking structure with the pedal front end structure 2, enhancing overall integrity. The front-end sealing component 3 has a wall thickness of 1.5mm cast aluminum structure, retaining only the installation strength at the connection position, which ensures both aesthetics and energy absorption performance at the collision angle between the vehicle and the platform during operation.

[0080] Specifically, the front-end sealing component 3 includes:

[0081] The closed cylinder 33, which has a right-angled triangular cross-section, and the sealing cap 34 located at one axial end of the closed cylinder 33 are integrally formed.

[0082] The horizontal extension plate 31 and the vertical extension plate 32 are fixed to the inner surface of the sealing cover 34.

[0083] The closed cylinder 33 is a closed profile structure extending axially, with a right-angled triangle cross-section, the three sides corresponding to the horizontal side, vertical side, and hypotenuse, respectively. The sealing cover 34 is located at one axial end of the closed cylinder 33 and is used to seal the end face of the cover. The cross-section of the closed cylinder 33 is consistent with the front end structure 2 of the pedal, achieving a seamless connection. The horizontal extension plate 31 and the vertical extension plate 32 are fixed on the inner surface of the sealing cover 34, and metal plates extend in two directions from the sealing cover 34 toward the pedal. The above structure has a high degree of integration, and the external force is transmitted directly from the sealing cover 34 and the extension plate to the pedal body through the shortest path.

[0084] Furthermore, the sealing cover 34 is a smooth curved surface that extends from the right-angled vertex of a right-angled triangle to the hypotenuse of the right-angled triangle and inwards. The right-angled vertex is the interior angle where the vertical and horizontal sides intersect in the right-angled triangular cross-section of the front sealing component 3, serving as the starting reference point for the curved surface. The extension direction of the curved surface is from the right-angled vertex to the hypotenuse; that is, it extends along the inclined transition surface of the front structure 2 of the pedal, ensuring that the shape of the sealing cover 34 is smoothly connected to the main body of the pedal without abrupt changes or misalignment. The surface of the sealing cover 34 is concave inwards towards the pedal relative to the original right-angled triangular plane, forming a concave arc surface. The concave curved surface has a self-reinforcing effect, resisting local impacts. At the same time, when the pedal device collides with the platform along the direction of travel, the shape of the sealing cover 34 can also effectively avoid part of the impact, reducing the risk of the pedal device breaking.

[0085] Based on the above embodiments, a pad 4 is also included, which is fixed between the pedal front end structure 2 and the pedal mounting plate 1 along the vehicle width direction. The pad 4 extends along the vehicle length direction and its top is flush with the top of the pedal front end structure 2.

[0086] To further adapt to the compensation length of different platforms, a pad 4 can be set between the front end structure 2 of the tread and the tread mounting plate 1. This pad extends along the length direction. When the width of the plane containing the two right-angled sides of the front end structure 2 of the tread cannot compensate for the length, the extension length of the tread can be further adjusted by setting treads of different thicknesses, achieving three levels of length adjustment to meet the needs of different platforms and providing good versatility. The top is flush, eliminating the risk of tripping and conforming to ergonomic standards. The pad 4 is preferably an aluminum pad 4.

[0087] The pedal device provided in this application adopts a modular design, with a structure divided into three parts: front, middle, and rear. The front pedal structure 2 uses a triangular hollow thin-walled aluminum profile structure to replace rubber material, absorbing the impact force in the vehicle's width and length directions. After impact, it shatters without damaging the vehicle body structure or mounting points. The middle part uses an adjustable-thickness pad 4 to enhance the pedal's compensation distance adjustment capability, thereby changing the pedal's extension distance. The front pedal structure 2 can be installed in reverse, with a unified installation interface. Changing the width of the vertical bearing surface allows for changes in the overall extension length of the pedal. These two combinations enable the pedal structure to change the pedal extension distance according to the compensation needs of different platforms, improving the versatility of the pedal application. The rear pedal mounting plate 1 uses a thick-walled plate-shaped aluminum profile support structure, achieving stable support through multi-angle and multi-area contact with the vehicle body, protecting the vehicle body and reducing mounting points. It meets the requirement of allowing passengers to board the tram through the side door when it stops at a low platform; it has high reliability, is easy to maintain, has an aesthetically pleasing shape, and has adjustable extension dimensions; it is applicable to a wider range of urban line platform clearance requirements, and even situations requiring crossing stations.

[0088] For the first time, aluminum alloy is used in the pedals instead of commonly used non-metallic materials such as rubber to achieve collision protection. This solves the problems of short lifespan and high maintenance costs associated with rubber materials used on the outside of vehicles, and avoids the risk of train derailment due to the reaction force from high-speed impacts with rubber. The front end of the pedal utilizes a metal forming approach, overcoming the challenges of using a single material for rubber strips, fixed rubber molding methods, difficulty in differentiating compressive strength in different directions, and the immature and costly methods of filling or altering the molecular structure of materials. Different strengths of aluminum alloys are selected, and the wall thickness of the aluminum alloy is designed according to different cavity shapes and volumes. This achieves the goal of the front end component being able to break and absorb energy upon impact while also being able to bear the weight of passengers. It does not damage the vehicle body when subjected to external impacts and has the function of absorbing energy in collisions at speeds below 40 km / h, preventing the risk of vehicle derailment in the event of a collision. The independent design of the impact-resistant front end of the pedal, as a vulnerable and consumable component, saves on wear and tear costs.

[0089] like Figure 9-11 As shown, Figure 9 This is a schematic diagram of the assembly structure of the pedal device described in the embodiments of this application; Figure 10 This is a cross-sectional view of the vehicle body at the door. Figure 11 This is a diagram showing the state of the sliding door when it is closed.

[0090] Based on the above-mentioned pedal device, this application also provides a rail vehicle, including a car body, a sliding door assembly, and the pedal device of any of the above embodiments. The sliding door assembly includes a sliding door leaf 51 and a sliding door frame 52. The sliding door frame 52 is arranged around the doorway of the door body, and the bottom of the sliding door frame 52 is provided with an opening, and step structures 53 are respectively provided at both ends of the opening. The pedal mounting plate 1 of the pedal device overlaps the step structure 53 at both ends along its length, and the pedal mounting plate 1 and the sliding door frame 52 are in the same plane.

[0091] The sliding door frame 52 is broken at its lower edge to provide space for the installation of the pedal device. At the two ends of the opening at the bottom of the door frame, locally thickened or raised stepped surfaces are provided to support the pedal mounting plate 1. The height of the steps is flush with or slightly lower than the door frame body to ensure a consistent final assembly surface. The two ends of the pedal mounting plate 1 are placed directly on the support surfaces of the two stepped structures 53, supported by surface contact, and fixed to the lower side beam 6 of the vehicle body via the first vertical plate 11 of the pedal mounting plate 1, thus achieving a press-fit between the pedal mounting plate 1 and the sliding door frame 52. The upper surface of the pedal mounting plate 1 is coplanar with or substantially flush with the outer surface of the sliding door frame 52 (especially the side frame); the door frame extends downwards and naturally transitions to the pedal area without obvious steps or recesses.

[0092] Specifically, the sliding door panel 51 extends downward to the middle of the first mounting hole 111 of the pedal mounting plate 1; the vehicle body also includes a lower side beam 6, and the pedal mounting plate 1 is fixed to the lower side beam 6 of the vehicle body via the first mounting hole 111 and threaded fasteners.

[0093] When the sliding door leaf 51 is closed, the lower edge extends vertically into the interior area of ​​the pedal mounting plate 1; the lower edge of the door leaf covers and approaches the center of the first mounting hole 111 on the pedal mounting plate 1 for connection, and the lower edge of the door leaf is close to or covers the mounting hole area, reducing bottom gaps, preventing wind, rain, dust and snow from entering, and enhancing sealing; and when the sliding door leaf 51 is closed, it achieves anti-theft function by blocking the first mounting hole 111.

[0094] The threaded fastener passes through the first mounting hole 111 on the pedal mounting plate 1 and connects to the threaded hole or nut on the lower side beam 6 of the vehicle body; it achieves rigid anchoring and is directly connected to the main load-bearing structure, with strong tensile, shear and vibration resistance; it avoids the pedal from loosening due to local deformation of the door frame; it can withstand the combined loads of frequent stepping, wheelchair passage, and luggage dragging; the first mounting hole 111 is exposed, and the fastening status can be checked regularly.

[0095] The sliding door panel 51 extends downward to achieve bottom sealing and safety protection; the pedal mounting plate 1 serves as an intermediate transition structure and integrates mounting holes; the first mounting hole 111 provides a connection structure, and its position is covered and protected by the sliding door panel 51. The key connection points are shielded by the door panel, which is dustproof and waterproof, and extends the service life; the lower side beam 6 of the vehicle body provides the ultimate load-bearing foundation to ensure structural stability.

[0096] In one alternative embodiment, the vehicle body further includes:

[0097] The door sill 7 is located inside the vehicle body. The front end of the door sill 7 is provided with a stepped glue injection groove, and a glue injection cavity 71 is formed between the stepped glue injection groove and the inner surface of the sill mounting plate 1.

[0098] The bottom of the sliding door panel 51 is provided with a sealing component 54 that runs the entire length of the panel, and the sealing component 54 is in close contact with the outer surface of the pedal mounting plate 1.

[0099] The door sill 7 is a floor transition structure inside the vehicle body near the door area. It is usually made of metal or composite material with an anti-slip layer on the surface. It connects the interior floor and the door opening, providing a safe passage path. The stepped injection groove is a stepped groove set at the front end of the door sill 7 (near the doorway). It can be L-shaped, and the stepped injection groove and the inner surface of the sill mounting plate 1 together form a closed or semi-closed space, i.e., a U-shaped structure. It is used to inject structural adhesive or sealant to block the penetration path of water, air, and dust from outside the vehicle to inside. At the same time, the sealing component 54 is set at the bottom of the sliding door leaf 51. It is made of rubber or TPE material and includes structures such as a main sealing lip and auxiliary sealing ribs. It is arranged continuously along the longitudinal direction of the vehicle body, covering the entire door width to ensure the integrity of the seal. When the door is closed, the sealing component 54 is pressed against the outer surface of the sill mounting plate 1 to form a line contact or surface contact seal.

[0100] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0101] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A pedal device, characterized in that, include: The pedal mounting plate is located below the door frame on the outside of the vehicle body and is used for a detachable and fixed connection with the lower side beam of the vehicle body. The front end structure of the pedal has a cross-section in the shape of a right triangle. One of the two right-angled sides of the right triangle can be detachably and fixedly connected to the pedal mounting plate, while the other side is used for passengers to get on and off the vehicle. The right triangle is an scalene triangle. The front sealing components are located at both ends of the front end structure of the pedal along its length and are detachably and fixedly connected to the front end structure of the pedal.

2. The pedal device according to claim 1, characterized in that, The front sealing component is a closed shell with an opening on one side. The closed shell is provided with a horizontal extension plate and a vertical extension plate extending to the outside of the opening. The horizontal extension plate and the vertical extension plate are respectively provided with sealing installation holes. The horizontal extension plate and the vertical extension plate are inserted into the cavity of the front end structure of the pedal, and are fixed to the plane of the two right-angled sides of the front end structure of the pedal respectively through the sealing mounting hole and the threaded fastener.

3. The pedal device according to claim 2, characterized in that, The front-end sealing component includes: A closed cylinder with a right-angled triangular cross-section and a sealing cap located at one axial end of the closed cylinder are integrally formed; The horizontal extension plate and the vertical extension plate are fixed to the inner surface of the sealing cover.

4. The pedal device according to claim 3, characterized in that, The sealing cap is a smooth curved surface that extends from the right-angled vertex of a right-angled triangle to the hypotenuse of the right-angled triangle and is concave inward.

5. The pedal device according to claim 4, characterized in that, The hypotenuse of the right triangle is a smooth curve that bends outward.

6. The pedal device according to any one of claims 1-5, characterized in that, Also includes: A pad is fixed between the front end structure of the pedal and the pedal mounting plate along the width direction of the vehicle. The pad extends along the length direction of the vehicle and its top is flush with the top of the front end structure of the pedal.

7. The pedal device according to claim 1, characterized in that, The pedal mounting plate has a Z-shaped cross section, which includes two parallel first vertical plates and second vertical plates, and a horizontal plate connecting the bottom end of the first vertical plate and the top end of the second vertical plate. The horizontal plate is flush with the plane containing the other right-angle side of the pedal front end structure. The first vertical plate is used to fix the lower side beam of the vehicle body, and the second vertical plate is used to fix the front end structure of the pedal.

8. The pedal device according to claim 7, characterized in that, The first vertical plate has several first mounting holes along its length for fixing to the lower side beam of the vehicle body.

9. The pedal device according to claim 8, characterized in that, The second vertical plate has a continuous weight-reducing groove on its inner surface away from the front end structure of the pedal; The second vertical plate has several second mounting holes on its outer surface near the front end structure of the pedal for fixing to the front end structure of the pedal.

10. The pedal device according to claim 9, characterized in that, The plane containing the two legs of the right triangle is provided with a plurality of pedal front mounting holes along the length direction; the pedal front mounting holes are provided in correspondence with the second mounting holes. The pedal front end structure and the pedal mounting plate are fixed by the pedal front end mounting hole, the second mounting hole and threaded fasteners.

11. The pedal device according to claim 10, characterized in that, The plane containing the hypotenuse of the right triangle is provided with a clearance opening, which corresponds to the mounting hole at the front end of the pedal, allowing space for the installation of threaded fasteners and the mounting hole at the front end of the pedal.

12. A rail vehicle, characterized in that, The invention includes a vehicle body, a sliding door assembly, and a pedal device as described in any one of claims 1-11. The sliding door assembly includes a sliding door leaf and a sliding door frame. The sliding door frame is arranged around the doorway of the door body, and the bottom of the sliding door frame is open, with stepped structures at both ends of the opening. The pedal mounting plate of the pedal device has its two ends overlapping the step structure along its length, and the pedal mounting plate and the sliding door frame are in the same plane.

13. The rail vehicle according to claim 12, characterized in that, The sliding door panel extends downward to the middle of the first mounting hole of the pedal mounting plate; The vehicle body also includes a lower side beam, and the pedal mounting plate is fixed to the lower side beam via the first mounting hole and threaded fasteners.

14. The rail vehicle according to claim 13, characterized in that, The vehicle body also includes: The door sill is located inside the vehicle body. The front end of the door sill is provided with a stepped glue injection groove, and a glue injection cavity is formed between the stepped glue injection groove and the inner surface of the sill mounting plate. The bottom of the sliding door panel is provided with a sealing component that runs the entire length of the panel, and the sealing component is in close contact with the outer surface of the pedal mounting plate.

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