The gangway above the bogie

Abstract

The present invention discloses a through passage arranged above a bogie, comprising a first folding shed assembly, a second folding shed assembly, an upper pedal assembly and a lower pedal assembly, wherein the first folding shed assembly comprises a first folding shed cloth with multiple rings, a first shed cloth clamping frame, a first screw frame, a first intermediate connecting frame and a first docking frame, and the second folding shed assembly comprises a second folding shed cloth with multiple rings, a second shed cloth clamping frame, a second screw frame, a second intermediate connecting frame and a second docking frame, the upper pedal assembly is fixedly connected to the first docking frame and the second docking frame, and the upper pedal assembly comprises an intermediate pedal and side pedals respectively hinged on both sides of the intermediate pedal, and the side pedals are overlapped on the lower pedal assembly; the lower pedal assembly has two groups, respectively located on both sides of the upper pedal assembly, and the lower pedal assembly comprises a first hinge and a second hinge which are hingedly connected, and the present invention can absorb the vertical displacement generated by the steering overhead spring when the vehicle is running.

Description

Technical Field

[0001] The invention relates to a through passage arranged above a bogie, belonging to the field of rail transit vehicles. Background Art

[0002] In the prior art, the gangway is located at the connection between the carriages for people to pass safely between the carriages, and the bogie is located at the bottom of the carriage and at a certain distance from the gangway. The disadvantages of the existing gangway design are: the bogie of a certain rail transit high-speed vehicle is designed to be located at the connection between the carriages, and the vehicle has strict outer contour size restrictions, internal clear width and height requirements for the reserved gangway area, the existing gangway pedal structure cannot absorb the vertical displacement caused by the bogie overhead spring when the vehicle is running, and there is no buffer protection mechanism on the outer contour surface. Summary of the invention

[0003] The purpose of the present invention is to design a through passage for the bogie directly below the car connection to solve the requirements of the up and down movement working curve of the adjacent cars and the bogie air springs generated when this type of vehicle is running, and absorb the vertical displacement generated by the bogie overhead spring when the vehicle is running.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a through passage placed above the bogie, including a first folding shed assembly, a second folding shed assembly, an upper pedal assembly and a lower pedal assembly, the first folding shed assembly includes a multi-ring first folding shed cloth, a first shed cloth clamping frame, a first screw frame, a first intermediate connecting frame and a first docking frame, adjacent first folding shed cloths are clamped and connected by the first shed cloth clamping frame, the outermost first folding shed cloth is fixedly connected to the first screw frame, the innermost first folding shed cloth is fixedly connected to the first intermediate connecting frame, and the first intermediate connecting frame is fixedly connected to the first docking frame; the second folding shed assembly includes a multi-ring second folding shed cloth, a second shed cloth clamping frame, a second screw frame, a second intermediate connecting frame and a second docking frame, adjacent second folding shed cloths are clamped and connected by the first shed cloth clamping frame, the outermost first folding shed cloth is fixedly connected to the first screw frame, the innermost first folding shed cloth is fixedly connected to the first intermediate connecting frame, and the first intermediate connecting frame is fixedly connected to the first docking frame; The shed cloths are connected by clamping through a second shed cloth clamping frame, the outermost second folding shed cloth is fixedly connected to the second screw frame, the innermost second folding shed cloth is fixedly connected to the second intermediate connecting frame, the second intermediate connecting frame is fixedly connected to the second docking frame assembly, and the first docking frame assembly is fixedly connected to the second docking frame assembly; the upper pedal assembly is fixedly connected to the first docking frame assembly and the second docking frame assembly, and the upper pedal assembly includes a middle pedal and side pedals respectively hinged on both sides of the middle pedal, and the side pedals are overlapped on the lower pedal assembly; the lower pedal assembly has two groups, which are respectively located on both sides of the upper pedal assembly, and the lower pedal assembly includes a first hinge and a second hinge which are hingedly connected, the second hinges are respectively fixed to the vehicle body, and the first hinges are freely overlapped on the first folding shed assembly and the second folding shed assembly.

[0005] Preferably, the first folding shed assembly also includes a first intermediate connection frame sealing strip, a first docking frame sealing strip, a first bottom anti-collision rubber strip, a first upper pedal support seat and a first lower pedal support wear-resistant block, the first intermediate connection frame sealing strip is located between the first intermediate connection frame and the first docking frame assembly, the first docking frame sealing strip is located outside the first docking frame assembly, the first bottom anti-collision rubber strip is located at the bottom of the first intermediate connection frame, the first upper pedal support seat is fixedly connected to the first docking frame assembly for fixing the upper pedal assembly, and the first lower pedal support wear-resistant block is used for the first folding leaf to overlap and abut. The first intermediate connection frame sealing strip and the first docking frame sealing strip are used to improve the sealing of the through-channel, and the first bottom anti-collision rubber strip is used to buffer the vertical displacement of the steering overhead spring at the bottom of the through-channel under certain working conditions.

[0006] Preferably, the second bellows assembly also includes a second intermediate connection frame sealing strip, a second docking frame sealing strip, a second bottom anti-collision rubber strip, a second upper pedal support seat and a second lower pedal support wear-resistant block, the second intermediate connection frame sealing strip is located between the second intermediate connection frame and the second docking frame assembly, the second docking frame sealing strip is located outside the second docking frame assembly, the second bottom anti-collision rubber strip is located at the bottom of the second intermediate connection frame, the second upper pedal support seat is fixedly connected to the second docking frame assembly for fixing the upper pedal assembly, and the second lower pedal support wear-resistant block is used for overlapping and abutting against another group of first folding leaves. The second intermediate connection frame sealing strip and the second docking frame sealing strip are used to improve the sealing of the through-passage, and the second bottom anti-collision rubber strip is used to buffer the vertical displacement of the steering overhead spring at the bottom of the through-passage under certain working conditions.

[0007] Preferably, the adjacent ends of the first docking frame component and the second docking frame component are equipped with a slidable locking mechanism, and the second docking frame component is oppositely provided with a locking hook, the inner sides of the first docking frame component and the second docking frame component both have a side anti-collision component, and the lower end of the first docking frame component has a positioning pin, which is matched with the positioning hole of the second docking frame component. The first docking frame component and the second docking frame component are locked with the locking hook through the locking mechanism, and the connection is compact and firm.

[0008] Preferably, the locking mechanism comprises a locking plate and a handle, wherein the handle is fixedly connected to the locking plate, and a locking groove cooperating with a locking hook is provided on the locking plate. The locking plate can be slid by operating the handle, and the locking groove cooperates with the locking hook to lock.

[0009] Preferably, the upper pedal assembly further comprises a hinge and an upper rubber strip, the side pedal is hinged to the middle pedal by the hinge, the upper rubber strip is fixed to the side of the middle pedal by bolts, and a wear strip is also installed at the end of the middle pedal. The two side pedals are connected to the middle pedal by the hinge, so that the upper pedal has the ability to absorb vertical displacement.

[0010] Preferably, the lower pedal assembly further comprises a lower rubber strip component and a lower pedal support seat, wherein the lower rubber strip component is located at both ends of the first hinge, and the lower pedal support seat is used to be fixed on the vehicle body, thereby ensuring the connection rigidity and playing a wear-resistant role.

[0011] After adopting the above structure, the invention adopts a double folding shelf assembly for locking connection, which is installed directly above the bogie after connection, and the upper pedal assembly includes side pedals respectively hinged on both sides of the middle pedal, and the lower pedal has two groups, which are respectively located on both sides of the upper pedal assembly, and the lower pedal assembly includes a first hinge and a second hinge that are hingedly connected. Therefore, the hinged structure of the side pedal and the hinge can absorb the vertical displacement generated by the bogie overhead spring when the vehicle is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a stereogram of the present invention;

[0013] Figure 2 yes Figure 1 Figure 1 A cross-sectional view of

[0014] Figure 3 yes Figure 1 A schematic diagram of a connection between a first docking frame component and a second docking frame component;

[0015] Figure 4 yes Figure 2 Enlarged view of part A in the middle;

[0016] Figure 5 yes Figure 2 Enlarged view of middle part B;

[0017] Figure 6 yes Figure 1 Exploded view of the upper pedal assembly;

[0018] Figure 7 yes Figure 1 Top view of the middle and lower pedal assembly;

[0019] Figure 8 yes Figure 7 Left view of

[0020] Fig. 9 It is a three-dimensional diagram of the locking mechanism;

[0021] Fig.10 This is the status diagram under normal vehicle conditions;

[0022] Fig.11 It is a schematic diagram of absorbing vertical displacement. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the embodiments given in the accompanying drawings.

[0024] See also Figure 1-8 As shown, a through passage arranged above a bogie comprises a first folding shed assembly 1, a second folding shed assembly 2, an upper pedal assembly 3 and a lower pedal assembly 4. The first folding shed assembly 1 comprises a three-ring first folding shed cloth 1-1, a first shed cloth clamping frame 1-2, a first screw frame 1-3, a first intermediate connecting frame 1-4 and a first docking frame assembly 1-5. Adjacent first folding shed cloths 1-1 are clamped and connected by the first shed cloth clamping frames 1-2. The outermost first folding shed cloth 1-1 is fixedly connected to the first screw frame 1-3, the innermost first folding shed cloth 1-1 is fixedly connected to the first intermediate connecting frame 1-4, and the first intermediate connecting frame 1-4 is fixedly connected to the first docking frame assembly 1-5 by bolts. It also includes a first middle connecting frame sealing strip 1-6, a first docking frame sealing strip 1-7, a first bottom anti-collision rubber strip 1-8, a first upper pedal support seat 1-9 and a first lower pedal support wear-resistant block 1-10. The first middle connecting frame sealing strip 1-6 is located between the first middle connecting frame 1-4 and the first docking frame assembly 1-5, the first docking frame sealing strip 1-7 is located on the outside of the first docking frame assembly 1-5, the first bottom anti-collision rubber strip 1-8 is located at the bottom of the first middle connecting frame 1-4, the first upper pedal support seat 1-9 is fixedly connected to the first docking frame assembly 1-5 for fixing the upper pedal assembly 3, and the first lower pedal support wear-resistant block 1-10 is used for overlapping and abutting the first folding leaf 4-1.

[0025] See also Figure 4 As shown, the first folding shed cloth 1-1 is the flexible body of the through passage, which is used to absorb the displacement in all directions generated when the vehicle body is running. There are three rings in total, each ring includes two layers of shed cloth, inner and outer, with a layer of sound-absorbing material sandwiched between them to improve the sound insulation and heat insulation performance. Adjacent shed cloths are connected by the first shed cloth clamping frame 1-2, which increases the rigidity of the flexible shed cloth body. The first screw frame 1-3 is one of the vehicle end interfaces, with a clamping opening designed on one side, which is clamped and connected to the outermost shed cloth as a whole, and the other side is fixed to the vehicle body end wall by studs. The first intermediate connecting frame 1-4 is used to connect the first folding shed cloth 1-1 and the first docking frame assembly 1-5, with a clamping opening designed on one side and clamped and connected to the innermost shed cloth as a whole, and the other side is connected to the first docking frame assembly 1-5 by screws. The first intermediate connecting frame sealing strip 1-6 is installed between the first intermediate connecting frame 1-4 and the first docking frame assembly 1-5, which is used to improve the sealing of the through passage, and a stepped gap is left at its bottom. The first docking frame sealing strip 1-7 is installed on the locking joint surface of the first docking frame assembly 1-5, and is used to provide sealing after the two bellows assemblies are locked. The first bottom anti-collision rubber strip 1-8 at the bottom is used to buffer the vertical displacement of the bogie spring at the bottom of the through-passage under certain working conditions. Both ends of the strip also have step notches, which cooperate with the bottom step notches of the first intermediate connection frame sealing strip 1-6, and are fixed with the bolts of the first docking frame assembly 1-5 and the first intermediate connection frame 1-4. After installation, apply sealant at the step joint to enhance the sealing performance.

[0026] See also Figure 5 As shown, the overall structure of the second folding shed assembly 2 is the same as that of the first folding shed assembly 1. The second folding shed assembly 2 includes a three-ring second folding shed cloth 2-1, a second shed cloth clamping frame 2-2, a second screw frame 2-3, a second intermediate connecting frame 2-4 and a second docking frame assembly 2-5. Adjacent second folding shed cloths 2-1 are clamped and connected by the second shed cloth clamping frame 2-2. The outermost second folding shed cloth 2-1 is fixedly connected to the second screw frame 2-3, the innermost second folding shed cloth 2-1 is fixedly connected to the second intermediate connecting frame 2-4, the second intermediate connecting frame 2-4 is fixedly connected to the second docking frame assembly 2-5, and the first docking frame assembly 1-5 is fixedly connected to the second docking frame assembly 2-5. The second folding shed assembly 2 It also includes a second middle connection frame sealing strip 2-6, a second docking frame sealing strip 2-7, a second bottom anti-collision rubber strip 2-8, a second upper pedal support seat 2-9 and a second lower pedal support wear-resistant block 2-10. The second middle connection frame sealing strip 2-6 is located between the second middle connection frame 2-4 and the second docking frame assembly 2-5. The second docking frame sealing strip 2-7 is located on the outside of the second docking frame assembly 2-5. The second bottom anti-collision rubber strip 2-8 is located at the bottom of the second middle connection frame 2-4. The second upper pedal support seat 2-9 is fixedly connected to the second docking frame assembly 2-5 for fixing the upper pedal assembly 3. The second lower pedal support wear-resistant block 2-10 is used for overlapping and abutting against another group of first folding pages 4-1.

[0027] See also Figure 6 As shown, the upper pedal assembly 3 is fixedly connected to the first docking frame assembly 1-5 and the second docking frame assembly 2-5, and the upper pedal assembly 3 includes an intermediate pedal 3-1 and side pedals 3-2 respectively hinged on both sides of the intermediate pedal 3-1, and the side pedals 3-2 are overlapped on the lower pedal assembly 4. It also includes a hinge 3-3 and an upper rubber stop bar 3-4, the side pedals 3-2 are hinged to the intermediate pedal 3-1 through the hinge 3-3, the upper rubber stop bar 3-4 is fixedly connected to the side of the intermediate pedal 3-1 through bolts, and a wear strip 3-5 is also installed at the end of the intermediate pedal 3-1.

[0028] The middle pedal 3-1 is provided with a mounting hole, which is connected to the first upper pedal support seat 1-9 of the first bellows assembly 1 and the second upper pedal support seat 2-9 of the second bellows assembly 2 by screws. The two side pedals 3-2 are connected to the middle pedal 3-1 by hinges 3-3, so that the upper pedal has the ability to absorb vertical displacement. The upper rubber strip 3-4 is integrally formed of EPDM and stainless steel plate. The stainless steel plate side is connected to the middle pedal 3-1 and the side pedal 3-2 by bolts, and the EPDM side will contact the bellows fabric surface to play a wear-resistant role. The wear strip 3-5 is made of nylon, installed on the outer end of the side pedal 3-2, and its bottom is overlapped on the lower pedal assembly 4.

[0029] See also Figure 7 and 8 As shown, the lower pedal assembly 4 has two groups, which are respectively located on both sides of the upper pedal assembly 3, and the lower pedal assembly 4 includes a first hinge 4-1 and a second hinge 4-2 which are hingedly connected. The second hinge 4-2 is respectively fixed on the vehicle body, and the first hinge 4-1 is freely overlapped on the first bellows assembly 1 and the second bellows assembly 2. The lower pedal assembly 4 also includes a lower rubber strip assembly 4-3 and a lower pedal support seat 4-4. The lower rubber strip assembly 4-3 is located at both ends of the first hinge 4-1, and the lower pedal support seat 4-4 is used to be fixed on the vehicle body. The first hinge 4-1 and the second hinge 4-2 form a complete hinge. Since the bogie is located directly below the through-channel, the hinge allows the lower pedal assembly 4 to absorb the vertical displacement caused by the bogie overhead spring. The schematic diagram is shown in FIG. Fig.11 As shown. The free ends of the two groups of first hinges 4-1 are overlapped on the first lower pedal support wear-resistant block 1-10 and the second lower pedal support wear-resistant block 2-10 respectively, and the second hinge 4-2 is fixed to the vehicle body interface on the same side through the lower pedal support seat 4-4. In order to avoid unacceptable interference, a curve analysis is performed according to the vehicle operation route, and the position of each component of the through channel is combined to finally determine the outline of the second hinge 4-2. The lower rubber strip component 4-3 is integrally formed of rubber and stainless steel plate. The rubber side contacts the awning cloth, and the stainless steel side is fixed to the first hinge 4-1. While ensuring the connection stiffness, it also plays a wear-resistant role. The lower pedal support seat 4-4 is a component that connects the pedal and the vehicle body. The bottom hole is provided for bolt connection and fixation to the vehicle body, and the top hole is provided for bolt connection to the second hinge 4-2.

[0030] See also Figure 3 and 9As shown, a slidable locking mechanism 1-5-1 is installed at the adjacent ends of the first docking frame component 1-5 and the second docking frame component 2-5, and a locking hook 1-5-4 is arranged opposite to the second docking frame component 2-5. The inner sides of the first docking frame component 1-5 and the second docking frame component 2-5 both have a side anti-collision component 1-5-2. The lower end of the first docking frame component 1-5 has a positioning pin 1-5-3, and the positioning pin 1-5-3 is matched with the positioning hole of the second docking frame component 2-5. The locking mechanism 1-5-1 includes a locking plate 1-5-1-1 and a handle 1-5-1-2. The handle 1-5-1-2 is fixedly connected to the locking plate 1-5-1-1, and the locking plate 1-5-1-1 is provided with a locking groove 1-5-1-3 that matches the locking hook 1-5-4. The inner side of one end of the first docking frame assembly 1-5 in the longitudinal direction is provided with a closed cavity for the sliding of the lock plate 1-5-1-1. By operating the handle 1-5-1-2, the lock slot 1-5-1-3 can slide up and down within a certain range of travel along with the lock plate 1-5-1-1 inside the closed cavity. The outer side of the other end of the first docking frame assembly 1-5 in the longitudinal direction also has a fixed lock hook 1-5-4, and the second docking frame assembly 2-5 has a lock slot that can be locked on the same side. When the through channel is connected, the positioning pin 1-5-3 in the first folding shelf assembly 1 will be pre-aligned with the positioning hole in the second folding shelf assembly 2, and the lock hook 1-5-4 will be aligned with the lock slot 1-5-1-3 one by one. Then, the handle 1-5-1-2 is turned to push the lock plate 1-5-1-1 to slide from top to bottom until the lock slot 1-5-1-3 is stuck at the root of the lock hook 1-5-4. The advantages of this locking mechanism are that it has fewer components, is flexible and reliable, and the locking plate will not fall out of the locking plate sliding track.

[0031] See also Fig.10 As shown, the vehicle is in a normal driving state, and the lower part of the upper pedal assembly 3 is a bogie. When the bogie overhead spring is under stress and the carriage is required to make a vertical displacement, the hinged structure of the upper pedal assembly 3 and the lower pedal assembly 4 can absorb the vertical displacement generated by the bogie overhead spring when the vehicle is running, and deform to the following Fig.11 state.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A through passage disposed above a bogie, comprising a first bellows assembly (1), a second bellows assembly (2), an upper pedal assembly (3) and a lower pedal assembly (4), characterized in that: The first folding shed assembly (1) comprises a multi-ring first folding shed cloth (1-1), a first shed cloth clamping frame (1-2), a first screw frame (1-3), a first intermediate connecting frame (1-4) and a first docking frame component (1-5); adjacent first folding shed cloths (1-1) are clamped and connected by the first shed cloth clamping frame (1-2); the outermost first folding shed cloth (1-1) is fixedly connected to the first screw frame (1-3); the innermost first folding shed cloth (1-1) is fixedly connected to the first intermediate connecting frame (1-4); and the first intermediate connecting frame (1-4) is fixedly connected to the first docking frame component (1-5); The second folding shed assembly (2) comprises a multi-ring second folding shed cloth (2-1), a second folding shed cloth clamping frame (2-2), a second screw frame (2-3), a second intermediate connecting frame (2-4) and a second docking frame component (2-5); adjacent second folding shed cloths (2-1) are clamped and connected by the second folding shed cloth clamping frame (2-2); the outermost second folding shed cloth (2-1) is fixedly connected to the second screw frame (2-3); the innermost second folding shed cloth (2-1) is fixedly connected to the second intermediate connecting frame (2-4); the second intermediate connecting frame (2-4) is fixedly connected to the second docking frame component (2-5); and the first docking frame component (1-5) is fixedly connected to the second docking frame component (2-5); The upper pedal assembly (3) is fixedly connected to the first docking frame assembly (1-5) and the second docking frame assembly (2-5), and the upper pedal assembly (3) comprises a middle pedal (3-1) and side pedals (3-2) respectively hinged on both sides of the middle pedal (3-1), and the side pedals (3-2) are overlapped on the lower pedal assembly (4); The lower pedal assembly (4) has two groups, which are respectively located on both sides of the upper pedal assembly (3), and the lower pedal assembly (4) comprises a first hinge (4-1) and a second hinge (4-2) which are hingedly connected, the second hinge (4-2) is respectively fixed on the vehicle body, and the first hinge (4-1) is respectively freely overlapped on the first folding shelf assembly (1) and the second folding shelf assembly (2).

2. The through-passage disposed above the bogie according to claim 1, characterized in that: The first folding shelf assembly (1) further comprises a first middle connecting frame sealing strip (1-6), a first docking frame sealing strip (1-7), a first bottom anti-collision rubber strip (1-8), a first upper pedal support seat (1-9) and a first lower pedal support wear-resistant block (1-10); the first middle connecting frame sealing strip (1-6) is located between the first middle connecting frame (1-4) and the first docking frame assembly (1-5); the first docking frame sealing strip (1-7) is located outside the first docking frame assembly (1-5); the first bottom anti-collision rubber strip (1-8) is located at the bottom of the first middle connecting frame (1-4); the first upper pedal support seat (1-9) is fixedly connected to the first docking frame assembly (1-5) and is used to fix the upper pedal assembly (3); and the first lower pedal support wear-resistant block (1-10) is used to overlap and abut against the first folding leaf (4-1).

3. The through-passage disposed above the bogie according to claim 1, characterized in that: The second folding shelf assembly (2) further comprises a second intermediate connecting frame sealing strip (2-6), a second docking frame sealing strip (2-7), a second bottom anti-collision rubber strip (2-8), a second upper pedal support seat (2-9) and a second lower pedal support wear-resistant block (2-10); the second intermediate connecting frame sealing strip (2-6) is located between the second intermediate connecting frame (2-4) and the second docking frame assembly (2-5); the second docking frame sealing strip (2-7) is located outside the second docking frame assembly (2-5); the second bottom anti-collision rubber strip (2-8) is located at the bottom of the second intermediate connecting frame (2-4); the second upper pedal support seat (2-9) is fixedly connected to the second docking frame assembly (2-5) for fixing the upper pedal assembly (3); and the second lower pedal support wear-resistant block (2-10) is used for overlapping and abutting against another group of first folding leaves (4-1).

4. The through-passage disposed above the bogie according to claim 1, characterized in that: The adjacent ends of the first docking frame component (1-5) and the second docking frame component (2-5) are installed with a slidable locking mechanism (1-5-1), and the second docking frame component (2-5) is oppositely provided with a locking hook (1-5-4), the inner side portions of the first docking frame component (1-5) and the second docking frame component (2-5) are both provided with a side anti-collision component (1-5-2), and the lower portion of the end of the first docking frame component (1-5) is provided with a positioning pin (1-5-3), and the positioning pin (1-5-3) is matched with a positioning hole of the second docking frame component (2-5).

5. The through-passage disposed above the bogie according to claim 4, characterized in that: The locking mechanism (1-5-1) comprises a locking plate (1-5-1-1) and a handle (1-5-1-2); the handle (1-5-1-2) is fixedly connected to the locking plate (1-5-1-1); and the locking plate (1-5-1-1) is provided with a locking groove (1-5-1-3) that cooperates with a locking hook (1-5-4).

6. The through-passage disposed above the bogie according to claim 1, characterized in that: The upper pedal assembly (3) further comprises a hinge (3-3) and an upper rubber strip (3-4); the side pedal (3-2) is hingedly connected to the middle pedal (3-1) via the hinge (3-3); the upper rubber strip (3-4) is fixedly connected to the side of the middle pedal (3-1) via bolts; and a wear strip (3-5) is also installed at the end of the middle pedal (3-1).

7. The through-passage disposed above the bogie according to claim 1, characterized in that: The lower pedal assembly (4) further comprises a lower rubber strip assembly (4-3) and a lower pedal support seat (4-4), wherein the lower rubber strip assembly (4-3) is located at both ends of the first folding leaf (4-1), and the lower pedal support seat (4-4) is used for being fixed on the vehicle body.

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