CN110481584B - Low-floor vehicle body underframe structure and tramcar - Google Patents
Low-floor vehicle body underframe structure and tramcar Download PDFInfo
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- CN110481584B CN110481584B CN201910858729.5A CN201910858729A CN110481584B CN 110481584 B CN110481584 B CN 110481584B CN 201910858729 A CN201910858729 A CN 201910858729A CN 110481584 B CN110481584 B CN 110481584B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/10—Floors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D23/00—Construction of steps for railway vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
- B61F5/22—Guiding of the vehicle underframes with respect to the bogies
- B61F5/24—Means for damping or minimising the canting, skewing, pitching, or plunging movements of the underframes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses a low-floor vehicle body underframe structure and a tramcar. The second series spring mounting section is L-shaped, a first inclined rib plate is arranged at the right angle of the second series spring mounting section, and the vertical force path is smooth. The middle aisle comprises an aisle side wall profile, an aisle longitudinal beam profile and an aisle floor, the aisle side wall profile comprises a horizontal profile and a vertical profile which are connected through a second inclined rib plate, the top end of the aisle longitudinal beam profile is welded with the bottom end of the aisle side wall profile, the aisle floor is vertically welded with the aisle longitudinal beam profile, and the side, welded with the aisle floor, of the aisle longitudinal beam profile is a thickened plate, so that the rigidity of the aisle side wall profile is improved, a vertical stop structure does not need to be additionally arranged, the structure is simplified, and the weight of a vehicle body is reduced.
Description
Technical Field
The invention relates to the technical field of rail transit vehicle underframe, in particular to a low-floor vehicle body underframe structure and a tramcar.
Background
At present, the underframe of the car body of the 100 percent low-floor tramcar mainly adopts a steel structure and is formed by assembling and welding a plate girder structure. Although the steel structure has high strength, the steel structure has the defects of heavy weight, complex structure and the like, and is not beneficial to light weight design and production and manufacturing of the vehicle body.
Because the aluminum alloy has the advantage of high lightweight degree, the aluminum alloy section bar is widely applied to the underframe. However, the vertical forces at the aisle and at the mounting seats are large and require high strength. Therefore, a plurality of stacked parts are needed to meet the strength requirement at the positions close to the passageway and the seats, and the aluminum alloy section is of a cavity structure and occupies a large space.
Therefore, it is an urgent need to solve the problem of the art to provide a low-floor chassis structure with high light weight on the premise of meeting the strength and space requirements.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a chassis structure of a low-floor vehicle body, which can achieve light weight while satisfying the requirements of strength and space.
A second object of the invention is to provide a tram.
In order to achieve the first object, the present invention provides the following solutions:
a low-floor vehicle body underframe structure comprises a side cover plate and a middle passageway, wherein the side cover plate comprises a secondary spring mounting profile, the upper wall of the secondary spring mounting profile is a thickened plate, a vertical reinforcing rib is arranged between the upper wall of the secondary spring mounting profile and the lower wall of the secondary spring mounting profile, the secondary spring mounting profile is L-shaped, and a first inclined rib plate is arranged at the right angle of the secondary spring mounting profile;
the middle aisle comprises an aisle side wall profile, an aisle longitudinal beam profile and an aisle floor, the aisle side wall profile comprises a horizontal profile and a vertical profile, the horizontal profile is vertically connected with the vertical profile, the vertical profile is connected with the horizontal profile through a second inclined rib plate, the top end of the aisle longitudinal beam profile is welded with the bottom end of the aisle side wall profile, the aisle floor is vertically welded with the aisle longitudinal beam profile, and the side, welded with the aisle floor, of the aisle longitudinal beam profile is a thickened plate.
In a specific embodiment, the lower wall of the section bar of the horizontal section bar is a thickened plate for vertical stopping, and a vertical rib plate is connected between the lower wall of the section bar of the horizontal section bar and the upper wall of the section bar of the horizontal section bar.
In another specific embodiment, the low floor body chassis structure further comprises a fifth wheel;
the aisle longitudinal beam profile is provided with a reinforced side plate, the two sides of the traction seat are welded with the reinforced side plate, the traction seat is welded with the aisle floor in a splicing mode, and the upper surface of the traction seat is flush with the upper surface of the aisle floor.
In another embodiment, the fifth wheel is a solid profile; and/or
The traction seat is provided with a wing plate.
In another specific embodiment, the aisle longitudinal beam profile is provided with a support plate connected with the second diagonal rib plate; and/or
The lower surface of the aisle longitudinal beam profile is flush with the lower surface of the traction seat.
In another specific embodiment, the low floor body chassis structure further comprises a foot board;
the foot board is welded on the side wall section of the passageway in an overlapping manner;
the pedal is a bending piece.
In another specific embodiment, the side cover plate further comprises a first seat upright, a seat cover plate, a second seat upright, a second tie spring mounting profile, a seat lower cover plate and a third seat upright;
the first seat vertical plate is vertically welded on the lower surface of the seat cover plate, the second seat vertical plate is vertically welded on the upper surface of the seat cover plate, the lower seat cover plate is vertically welded on the upper surface of the second seat vertical plate, the second series spring mounting section bars are respectively welded with the side surface of the lower seat cover plate and the upper surface of the second vertical plate, the upper surface of the third vertical plate is vertically welded with the lower surface of the lower seat cover plate and the lower surface of the second series spring mounting section bars, and the upper surface of the second series spring mounting section bars is used for mounting a seat.
In another specific embodiment, the low floor body chassis structure further comprises an end beam;
the end beam is welded with the aisle floor and the aisle longitudinal beam, and the upper surfaces of the end beam, the aisle floor and the aisle longitudinal beam are flush.
In another specific embodiment, the intermediate aisle further comprises an aisle riser;
the corridor vertical plate is connected with the two series spring mounting sectional materials and the corridor side wall sectional material.
The various embodiments according to the invention can be combined as desired, and the embodiments obtained after these combinations are also within the scope of the invention and are part of the specific embodiments of the invention.
Without being limited to any theory, it can be seen from the above disclosure that, since the upper wall of the secondary spring mounting profile needs to bear the vertical force transmitted by the secondary spring of the bogie, the upper wall of the secondary spring mounting profile of the present invention is a thickened plate, and the vertical reinforcing rib is arranged between the upper wall of the secondary spring mounting profile and the lower wall of the secondary spring mounting profile, the strength of the secondary spring mounting profile is enhanced, and the requirements of the stiffness and strength of the vertical force of the secondary spring mounting profile are met. In addition, the right angle of the second series spring mounting section bar is provided with a first inclined rib plate, so that a vertical force path is smoother. The side wall section bar of the aisle comprises a horizontal section bar and a vertical section bar which are vertically connected, and the vertical section bar and the horizontal section bar are connected through the second inclined rib plate, so that the supporting strength of the side wall section bar of the aisle is increased. The aisle floor is vertically welded with the aisle longitudinal beam profile, and the side, welded with the aisle floor, of the aisle longitudinal beam profile is a thickened plate, so that the rigidity of the aisle longitudinal beam profile is improved, a vertical stop structure does not need to be additionally arranged, the structure is simplified, and the weight of a vehicle body is reduced. In summary, the present invention provides a chassis structure of a low floor vehicle body with a high degree of light weight, while satisfying the requirements of strength and space.
In order to achieve the second object, the present invention provides the following solutions:
a tramcar comprises the chassis structure of the low-floor body.
Since the tramcar disclosed by the invention comprises the low-floor car body underframe structure in any one of the above items, the beneficial effects of the low-floor car body underframe structure are all included in the tramcar disclosed by the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of the underframe structure of a low-floor vehicle body provided by the invention;
FIG. 2 is a schematic bottom view of the structure of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the underframe structure of the low-floor vehicle body provided by the invention;
FIG. 4 is a cross-sectional view of a secondary spring mounting section according to the present invention;
FIG. 5 is a schematic cross-sectional structural view of a side wall profile of a middle aisle according to the present invention;
FIG. 6 is a schematic cross-sectional structural view of a middle aisle stringer profile provided in accordance with the present invention;
FIG. 7 is a schematic view of a partial structure of a fifth wheel profile provided in the present invention;
fig. 8 is a schematic structural view of the traction seat profile provided by the invention.
Wherein, in fig. 1-8:
the structure comprises an end beam 1, a side cover plate 2, a first seat vertical plate 2-1, a seat cover plate 2-2, a second seat vertical plate 2-3, a second series spring installation section bar 2-4, a seat lower cover plate 2-5, a third seat vertical plate 2-6, a pedal plate 3, a middle passageway 4, a passageway vertical plate 4-1, a passageway side wall section bar 4-2, a passageway longitudinal beam section bar 4-3, a second inclined rib plate 4-5, a passageway floor 4-6, a traction seat section bar 4-7, a first inclined rib plate 2-4b, a vertical rib plate 4-2b, a support plate 4-3b, a wing plate 4-7a and a second series spring 5.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying fig. 1 to 8 and the detailed description thereof.
Example one
The invention discloses a low-floor vehicle body underframe structure, which comprises a side cover plate 2 and a middle passageway 4.
The side cover plate 2 comprises secondary spring mounting sectional materials 2-4, the upper walls of the secondary spring mounting sectional materials 2-4 are thickened plates, and the thickness of each thickened plate can be set according to actual requirements. Vertical reinforcing ribs are arranged between the upper wall of the second series spring mounting section bar 2-4 and the lower wall of the second series spring mounting section bar 2-4, the second series spring mounting section bar 2-4 is L-shaped, and a first inclined rib plate 2-4b is arranged at the right angle of the second series spring mounting section bar 2-4. In order to make the vertical force path smoother, the invention discloses that the first inclined rib plates 2-4b are arc-shaped inclined rib plates, and it should be noted that the first inclined rib plates 2-4b can also be in other shapes.
The lower wall of the secondary spring mounting section bar 2-4 is provided with holes according to the size of the secondary spring 5, so that the secondary spring 5 is embedded and mounted, meanwhile, the interference is avoided, and the space is utilized to the maximum.
The middle aisle 4 comprises aisle side wall profiles 4-2, aisle longitudinal beam profiles 4-3 and aisle floors 4-6, the aisle side wall profiles 4-2 comprise horizontal profiles and vertical profiles, the horizontal profiles are vertically connected with the vertical profiles, and specifically, the horizontal profiles are integrally connected with the vertical profiles. The vertical section bar and the horizontal section bar are connected through a second inclined rib plate 4-5, the top end of the aisle longitudinal beam section bar 4-3 is welded with the bottom end of the aisle side wall section bar 4-2, the aisle floor 4-6 is vertically welded with the aisle longitudinal beam section bar 4-3, and the side of the aisle longitudinal beam section bar 4-3 welded with the aisle floor 4-6 is a thickened plate. The seat can be arranged on the upper surface of the second series spring mounting section bar 2-4, and the space is reasonably utilized.
Because the upper wall of the secondary spring installation section bar 2-4 needs to bear the vertical force transmitted by the secondary spring of the bogie, the upper wall of the secondary spring installation section bar 2-4 is a thickened plate, and a vertical reinforcing rib is arranged between the upper wall of the secondary spring installation section bar 2-4 and the lower wall of the secondary spring installation section bar 2-4, the strength of the secondary spring installation section bar 2-4 is enhanced, and the requirements of the rigidity and the strength of the vertical stress of the secondary spring installation section bar 2-4 are met. In addition, the first inclined rib plates 2-4b are arranged at the right angles of the two series spring mounting sections 2-4, so that the vertical force path is smoother. The aisle side wall profile 4-2 transmits longitudinal tensile and compressive loads during traction and can transmit vertical load-bearing compressive loads, the aisle side wall profile 4-2 comprises a horizontal profile and a vertical profile which are vertically connected, and the vertical profile and the horizontal profile are connected through the second inclined rib plates 4-5, so that the support 4-3b strength of the aisle side wall profile 4-2 is increased. The aisle floors 4-6 and the aisle longitudinal beam profiles 4-3 are vertically welded, and the sides of the aisle longitudinal beam profiles 4-3 and the aisle floors 4-6 are thickened plates, so that the rigidity of the places is improved, a vertical stop structure does not need to be additionally arranged, the structure is simplified, and the weight of a vehicle body is reduced. In summary, the invention provides a low floor vehicle body underframe structure with high light weight degree on the premise of meeting the requirements of strength and space.
Example two
In the second embodiment provided by the present invention, the structure of the underframe structure of the low-floor vehicle body in this embodiment is similar to that of the underframe structure of the low-floor vehicle body in the first embodiment, and the same parts are not repeated and only differences are introduced.
In this embodiment, the invention discloses that the lower wall of the horizontal section is a thickened plate and used for vertical stopping, and a vertical stopping structure is avoided. A vertical rib plate 4-2b is connected between the lower wall of the section bar of the horizontal section bar and the upper wall of the section bar of the horizontal section bar.
Furthermore, the invention discloses a low-floor vehicle body underframe structure which further comprises a traction seat profile 4-7, wherein the aisle longitudinal beam profile 4-3 is provided with a reinforcing side plate, so that the reinforcing side plate is prevented from being welded on the aisle longitudinal beam. The two sides of the traction seat section bar 4-7 are welded with the reinforced side plates, the traction seat section bar 4-7 is welded with the aisle floor 4-6 in a splicing way, and the upper surface of the traction seat section bar 4-7 is flush with the upper surface of the aisle floor 4-6.
The right side wall of the aisle longitudinal beam profile 4-3 needs to be welded with the traction seat profile 4-7 and needs to bear larger longitudinal force, so that the right side wall of the aisle longitudinal beam profile 4-3 is thickened properly.
Furthermore, the invention discloses that the traction seat section bars 4-7 are solid section bars, and the manufacturing is convenient in consideration of the manufacturing feasibility.
Furthermore, the invention discloses that the traction seat section bar 4-7 is provided with the wing plates 4-7a, so that welding seams for welding the wing plates 4-7a subsequently are reduced, and further welding deformation can be reduced. It should be noted that the wings 4-7a can also be machined again depending on the force requirements and the space requirements for mounting the bogie fifth wheel profile 4-7.
Furthermore, the invention discloses a support plate 4-3b which is connected with a second inclined rib plate 4-5 on the longitudinal beam section 4-3 of the aisle, and the support plate provides support force for the side wall of the middle aisle 4 and improves the stress capacity of the bottom frame.
Furthermore, the invention discloses that the lower surface of the aisle longitudinal beam section 4-3 is flush with the lower surface of the traction seat section 4-7, in order to avoid welding seam crossing at the joint of the traction seat section 4-7, reduce stress concentration and improve the safety performance of the whole vehicle, the lower part of the aisle longitudinal beam section 4-3 is heightened to be as high as the traction seat section 4-7, then the sections of other parts are machined off, and only the part connected with the traction seat section 4-7 is reserved.
Further, the invention discloses a chassis structure of a low-floor vehicle body, which further comprises a pedal plate 3, wherein the pedal plate 3 is welded on the side wall section bar 4-2 of the passageway in an overlapping manner, so that the pedal requirement of passengers in riding is met. Specifically, the pedal 3 is of a plate structure, and in order to meet the space requirement of the bogie during operation, the invention discloses that the pedal 3 is a bending part, the space between the part and the bogie is enlarged, and the interference with the parts of the bogie is avoided.
Further, the invention discloses that the side cover plate 2 further comprises a first seat vertical plate 2-1, a seat cover plate 2-2, a second seat vertical plate 2-3, a second tied spring installation section bar 2-4, a seat lower cover plate 2-5 and a third seat vertical plate 2-6.
The first seat vertical plate 2-1 is vertically welded on the lower surface of the seat cover plate 2-2, the second seat vertical plate 2-3 is vertically welded on the upper surface of the seat cover plate 2-2, the lower seat cover plate 2-5 is vertically welded on the upper surface of the second seat vertical plate 2-3, the second series spring installation section bar 2-4 is respectively welded on the side surface of the lower seat cover plate 2-5 and the upper surface of the second vertical plate, the upper surface of the third vertical plate is vertically welded on the lower surface of the lower seat cover plate 2-5 and the lower surface of the second series spring installation section bar 2-4, and the upper surface of the second series spring installation section bar 2-4 is used for installing a seat. The lower seat cover plate 2-5 is small in stress, mainly used for bearing the load of passengers on the seat, relatively thin in section thickness and capable of reducing the whole vehicle mass while meeting the requirements on strength and rigidity, and is welded with the secondary spring mounting section 2-4 to form an integral structure of the lower seat cover plate 2-5.
Further, the invention discloses a low-floor vehicle body underframe structure which further comprises an end beam 1, wherein the end beam 1 is welded with the aisle floors 4-6 and the aisle longitudinal beam, and the upper surfaces of the end beam 1, the aisle floors 4-6 and the aisle longitudinal beam are flush. The corridor floors 4-6 are welded with the end beams 1 and the corridor longitudinal beam profiles 4-3, and steps and slopes are avoided, so that a 100% low floor of the whole vehicle is realized, passengers can conveniently pass through the corridor floors, and the riding comfort of the passengers is met.
The traction seat section bars 4-7 are welded with the aisle floors 4-6 in a splicing mode, and the upper surfaces of the traction seat section bars keep a plane to meet the passing performance of the aisle.
Further, the invention discloses a middle passageway 4 which also comprises a passageway vertical plate 4-1, wherein the passageway vertical plate 4-1 is connected with a second series spring installation section bar 2-4 and a passageway side wall section bar 4-2. Specifically, the aisle side vertical plate is formed by welding 4-1 of the aisle vertical plate, 4-2 of the aisle side wall profile, 4-3 of the aisle longitudinal beam profile and is connected with 4-7 of the traction seat profile and the side cover plate 2 in a welding mode, longitudinal tensile and compressive loads during traction are transmitted, and the compressive loads borne vertically can be transmitted. After welding the welding seam between the tunnel side wall section 4-2 and the tunnel longitudinal beam section 4-3, the tunnel side wall section and the tunnel longitudinal beam section 4-3 are connected by the second inclined rib plates 4-5.
The invention provides a chassis structure of a low-floor vehicle body, which is formed by assembling and welding a plurality of aluminum alloy sections, and compared with the traditional plate beam structure, the chassis structure has the advantages of simple structure, small number of welding lines, small welding deformation and realization of light weight of the vehicle body to a greater extent.
The structure comprises two series spring mounting sections 2-4, and internal rib plates are vertically arranged, so that vertical stress can be better transmitted; the upper wall thickness of the secondary spring mounting section bar 2-4 is increased to meet the vertical stress requirement; the arc-shaped inclined ribs are additionally arranged on the side, close to the middle passageway 4, of the section, so that vertical force can be better transmitted, a box-type structure is formed, and the underframe is more stable; the seat can be arranged on the upper surface of the second series spring mounting section bar 2-4, and the space is reasonably utilized.
The structure comprises a passage side wall section 4-2, and an internal rib plate of the section fully considers the force transmission direction and the force bearing point. The lower wall of the aisle side wall section 4-2 is properly increased in thickness and used as a vertical stop surface, and the vertical rib plates 4-2b are added to improve the rigidity of the aisle side wall section, so that a vertical stop structure does not need to be additionally arranged, the structure is simplified, and the weight of a vehicle body is reduced.
The result comprises a fifth wheel profile 4-7 with its own profile 4-7a, which reduces the welding seams for the subsequent welding of the profiles 4-7a and thus reduces the welding distortion.
EXAMPLE III
The invention provides a tramcar, which comprises a low-floor car body underframe structure in any one embodiment.
Since the tramcar disclosed by the invention comprises the low-floor car body underframe structure in any one of the embodiments, the beneficial effects of the low-floor car body underframe structure are all included in the tramcar disclosed by the invention.
In the description of the present invention, the terms defined in directions are only for convenience of description and simplicity of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and inventive features disclosed herein.
Claims (10)
1. A low-floor vehicle body underframe structure comprises a side cover plate and a middle passageway, and is characterized in that the side cover plate comprises a secondary spring mounting profile, the upper wall of the secondary spring mounting profile is a thickened plate, a vertical reinforcing rib is arranged between the upper wall of the secondary spring mounting profile and the lower wall of the secondary spring mounting profile, the secondary spring mounting profile is L-shaped, and a first inclined rib plate is arranged at the right angle of the secondary spring mounting profile;
the middle aisle comprises an aisle side wall profile, an aisle longitudinal beam profile and an aisle floor, the aisle side wall profile comprises a horizontal profile and a vertical profile, the horizontal profile is vertically connected with the vertical profile, the vertical profile is connected with the horizontal profile through a second inclined rib plate, the top end of the aisle longitudinal beam profile is welded with the bottom end of the aisle side wall profile, the aisle floor is vertically welded with the aisle longitudinal beam profile, and the side, welded with the aisle floor, of the aisle longitudinal beam profile is a thickened plate.
2. The underframe structure for low-floor vehicle bodies according to claim 1, wherein the lower section bar wall of the horizontal section bar is a thickened plate for vertical stopping, and a vertical rib plate is connected between the lower section bar wall of the horizontal section bar and the upper section bar wall of the horizontal section bar.
3. The low floor body chassis structure of claim 1, further comprising a fifth wheel;
the aisle longitudinal beam profile is provided with a reinforced side plate, the two sides of the traction seat are welded with the reinforced side plate, the traction seat is welded with the aisle floor in a splicing mode, and the upper surface of the traction seat is flush with the upper surface of the aisle floor.
4. The low floor body chassis structure of claim 3, wherein the fifth wheel is a solid profile; and/or
The traction seat is provided with a wing plate.
5. The low floor body chassis structure of claim 3, wherein the aisle stringer profile is provided with a support plate for attaching the second tilted gusset; and/or
The lower surface of the aisle longitudinal beam profile is flush with the lower surface of the traction seat.
6. The low floor body chassis structure of claim 1, further comprising a foot pedal;
the foot board is welded on the side wall section of the passageway in an overlapping manner;
the pedal is a bending piece.
7. The low floor vehicle body underframe structure of claim 1, wherein the side cover plate further comprises a first seat riser, a seat cover plate, a second seat riser, a second tie spring mounting profile, a seat lower cover plate and a third seat riser;
the first seat vertical plate is vertically welded on the lower surface of the seat cover plate, the second seat vertical plate is vertically welded on the upper surface of the seat cover plate, the lower seat cover plate is vertically welded on the upper surface of the second seat vertical plate, the second series spring mounting section bars are respectively welded with the side surface of the lower seat cover plate and the upper surface of the second seat vertical plate, the upper surface of the third seat vertical plate is vertically welded with the lower surface of the lower seat cover plate and the lower surface of the second series spring mounting section bars, and the upper surface of the second series spring mounting section bars is used for mounting a seat.
8. The low floor body chassis structure of claim 1, further comprising end beams;
the end beam is welded with the aisle floor and the aisle longitudinal beam, and the upper surfaces of the end beam, the aisle floor and the aisle longitudinal beam are flush.
9. The low-floor body chassis structure of any one of claims 1-8, wherein the intermediate aisle further comprises an aisle riser;
the corridor vertical plate is connected with the two series spring mounting sectional materials and the corridor side wall sectional material.
10. A tram comprising a low floor body underframe structure according to any one of claims 1-9.
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| CN201910858729.5A CN110481584B (en) | 2019-09-11 | 2019-09-11 | Low-floor vehicle body underframe structure and tramcar |
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| DE102020113308A1 (en) * | 2020-05-15 | 2021-11-18 | Elbe Flugzeugwerke Gmbh | Integral floor arrangement for rail vehicles |
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