CN111959547A

CN111959547A - Rail vehicle and high-low floor underframe structure thereof

Info

Publication number: CN111959547A
Application number: CN202010903736.5A
Authority: CN
Inventors: 王建军; 田洪雷; 李陆星; 蔡军爽; 肖婵娟
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2020-11-20
Anticipated expiration: 2040-09-01
Also published as: CN111959547B

Abstract

The invention discloses a rail vehicle and a high-low floor underframe structure thereof, wherein the high-low floor underframe structure comprises two side beams, two traction beams and a connecting beam; the two traction beams are symmetrically arranged on two sides of the longitudinal center line of the vehicle body; the both ends of tie-beam respectively with both sides boundary beam fixed connection, it is the section bar of transversal personally submitting "L" font to the configuration: in the lateral projection plane, the outer end faces of the vertical sections of the horizontal sections are fixedly connected with the inner ends of the two traction beams. The whole bearing capacity of chassis can be effectively coordinated through structural optimization, and higher strength requirement and power transmission requirement can be met on the basis of simplifying the structure.

Description

Rail vehicle and high-low floor underframe structure thereof

Technical Field

The invention relates to the technical field of rail transit, in particular to a rail vehicle and a high-low floor underframe structure thereof.

Background

At present, the low-floor structure is mostly used for urban trams with lower operation speed per hour, the high-low floor transition area is mostly a plate beam type tailor-welded slope structure or a step structure, parts are more, the structure is relatively complex, and the welding quantity is larger. Based on the characteristic that the speed is low when the existing vehicle operates, the design strength of the existing low-floor structure is generally lower, the power transmission efficiency is low, and the requirement of the TSI standard cannot be met.

In view of this, it is needed to provide a new method for optimizing the connection structure of the high-low floor chassis of the low-floor vehicle so as to meet the requirements of the electric vehicle group with higher speed grade on strength and power transmission.

Disclosure of Invention

In order to solve the technical problems, the invention provides a railway vehicle and a high-low floor chassis structure thereof, which can effectively coordinate the whole bearing capacity of the chassis through structural optimization, and can meet higher strength requirements and power transmission requirements on the basis of simplifying the structure.

The invention provides a high-low floor underframe structure, which is used for low-floor rail vehicles; comprises two side beams, two traction beams and a connecting beam; the two traction beams are symmetrically arranged on two sides of the longitudinal center line of the vehicle body; the both ends of tie-beam respectively with both sides boundary beam fixed connection, it is the section bar of transversal personally submitting "L" font to the configuration: in the lateral projection plane, the outer end faces of the vertical sections of the horizontal sections are fixedly connected with the inner ends of the two traction beams.

Preferably, a through opening is formed in the middle of the vertical section of the connecting beam, and the through opening is opposite to an inclined floor arranged between the two traction beams; the inner side end of the inclined floor is fixedly connected with the outer end face of the vertical section below the through hole, and the outer side ends of the inclined floor and the two traction beams are fixedly connected with a sleeper beam.

Preferably, an inclined reinforcing rib is arranged in the cross section of the connecting beam, the inclined reinforcing rib is consistent with the slope of the inclined floor, and the upper surfaces of the inclined reinforcing rib and the inclined floor are flush.

Preferably, the outer end surface of the vertical section of the connecting beam is provided with a high floor support rib, and the inner end surface of the horizontal section of the connecting beam is provided with a low floor support rib.

Preferably, the inner edge of the top surface of the horizontal section of the connecting beam is provided with a low floor lapping table formed by sinking.

Preferably, the high floor support rib and the low floor support rib are both horizontally arranged, the distance from the high floor support rib to the top surface of the vertical section is consistent with the height of the high floor assembly, and the distance from the low floor support rib to the low floor lap joint table of the horizontal section is consistent with the height of the low floor assembly.

Preferably, the high floor assembly between the two draft beams and the side beams on the corresponding side and the low floor assembly between the two side beams are formed by transversely and sequentially splicing a plurality of flat plate-shaped sectional materials.

Preferably, the vehicle body further comprises a vehicle lifting seat arranged at the intersection of the end part of the connecting beam and the edge beam on the corresponding side, and the vehicle lifting seat is fixedly connected with the outer end face of the vertical section of the connecting beam and the inner end face of the edge beam respectively.

Preferably, the horizontal section of the connecting beam is also used for supporting the built-in steps.

The invention also provides a railway vehicle, which comprises a vehicle body with a high-low floor, wherein the high-low floor adopts the high-low floor underframe structure.

Aiming at the existing low-floor railway vehicle, the invention innovatively provides a design idea of adopting parts into a whole, and an integrated mounting frame is formed by arranging an integrated L-shaped connecting beam, a traction beam and a side beam. Specifically, two ends of the connecting beam are respectively fixedly connected with the side beams at two sides, the outer end faces of the vertical sections of the connecting beam are fixedly connected with the inner end faces of the two traction beams, the inner end faces of the horizontal sections of the connecting beam are fixedly connected with the outer end faces formed by the low floors, and the high floors, the low floors and the inclined floors are installed on the basis of the frame. Compared with the prior art, the scheme arranges the section bar connecting beam with the L-shaped cross section in the high and low floor connecting transition area, has simple and reliable structure, and can effectively improve the construction manufacturability on the basis of effectively controlling the welding amount; simultaneously, the integral installation frame structure that this scheme provided can satisfy the structural strength requirement of higher speed grade rail train and to the transmission requirement of traction power.

In a preferred embodiment of the present invention, an inclined reinforcing rib is disposed in a cross section of the connecting beam, and the inclined reinforcing rib is aligned with an inclination of the inclined floor and has a flush upper surface. So set up for the tie-beam body through mouthful below to oblique strengthening rib aligns with oblique floor, and structural arrangement is more reasonable, on the basis of guaranteeing that this position department has better bearing strength, still can make things convenient for laying of interior floor cloth.

In another preferred embodiment of the present invention, a high floor joist is disposed on the vertical section of the coupling beam, and a low floor joist is disposed on the horizontal section of the coupling beam to support the high and low floor respectively. Therefore, the mounting interface form is optimized, and on one hand, the function of preassembling and positioning can be achieved when the whole underframe is assembled and welded; in addition, the weld joint design between the high floor and the low floor and the connecting beam can be reasonably configured on different dimensions, and the connecting strength at corresponding positions is ensured.

In another preferred embodiment of the present invention, a vehicle lifting seat is provided at the intersection of the end of the connecting beam and the corresponding side beam, so as to reinforce the strength of the connecting area while realizing the function of lifting the vehicle with large tonnage.

Drawings

FIG. 1 is a schematic view of a high-low floor underframe according to an embodiment;

FIG. 2 is a side view of the high and low floor chassis configuration of FIG. 1;

FIG. 3 is a cross-sectional schematic view of the coupling beam shown in FIG. 1;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 2;

fig. 6 is a schematic view of a high-low floor chassis structure formed from another view angle.

In the figure:

the vehicle-mounted lifting platform comprises a connecting beam 1, a vertical section 11, a through opening 111, an inclined reinforcing rib 112, a high floor support rib 113, a horizontal section 12, a low floor support rib 121, a low floor overlap table 122, a boundary beam 2, an upper boundary beam 21, a lower boundary beam 22\ a traction beam 3, a low floor component 4, a sleeper beam 5, an inclined floor 6, a high floor component 7 and a lifting seat 9.

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 drawings and specific embodiments.

Referring to fig. 1 and fig. 2, fig. 1 shows a high-low floor chassis structure according to the present embodiment, and fig. 2 is a side view of fig. 1.

The underframe is used for a low-floor vehicle, so that the transition area between a high floor and a middle low floor above a bogie at the end part of the vehicle body has better strength and longitudinal load bearing capacity. It can be understood that both longitudinal ends of the vehicle body are symmetrically arranged and have the same structure, and only one end structure of the underframe is shown in the figure for clearly showing the core invention point of the application.

The underframe is an integral installation frame, and a connecting beam 1, side beams 2 at two sides and a traction beam 3 are welded and fixed into a whole. As shown in the figure, the connecting beam 1 is a section bar with an L-shaped cross section, two ends of the connecting beam are respectively fixedly connected with the side beams 2 at two sides, in a lateral projection plane, the outer end faces of the vertical sections 11 of the connecting beam are fixedly connected with the inner ends of the two traction beams 3, and the inner end face of the horizontal section 12 of the connecting beam is fixedly connected with the outer end of the low floor assembly 4. Referring also to fig. 3, a cross-section of the connecting beam is shown.

The two traction beams 3 are symmetrically arranged on two sides of the longitudinal center line of the vehicle body, and the outer ends of the two traction beams are fixedly connected with the sleeper beam 5 to form a stable underframe structure. According to the scheme, the section bar connecting beam 1 with the L-shaped cross section is arranged in the high-low floor connecting transition area, the structure is simple and reliable, and the construction manufacturability can be effectively improved on the basis of effectively controlling the welding amount; the integral mounting frame structure can meet the structural strength requirement of a higher-speed grade rail train and the transmission requirement of traction power.

Further, a through opening 111 is formed in the middle of the vertical section 11 of the connecting beam 1, as shown in fig. 1, the through opening 111 is opposite to the inclined floor 6 arranged between the two traction beams 3; correspondingly, the inner end of the inclined floor 6 is fixedly connected with the outer end face of the vertical section 11 below the through opening 111, and the outer ends of the inclined floor 6 and the two traction beams 3 are fixedly connected with the sleeper beam 5. Preferably, the inclined floor 6 is designed as an aluminum alloy double-layer hollow section bar, is installed between two traction beams 3, has one end thereof being lapped on the sleeper beam 5 and the other end thereof being lapped on the passing opening 111 of the connecting beam 1, realizes the connection of high and low floor areas, and realizes the barrier-free passing function by matching with the installation of an internal step (not shown) supported by the horizontal section 12 of the connecting beam 1.

In order to optimize the form of the mounting interface, the cross section of the coupling beam 1 is provided with an inclined reinforcing rib 112, and as shown in fig. 2 and 3, the inclined reinforcing rib 112 is consistent with the slope of the inclined floor 6 and the upper surfaces of the inclined reinforcing rib and the inclined floor are flush. So set up for the tie-beam body through mouthful 111 below aligns with inclined floor 6 with oblique strengthening rib 112, on the basis of guaranteeing that this position department has better bearing strength, still can make things convenient for interior laying of floor cloth.

As shown in fig. 3, the outer end face of the vertical section 11 of the connecting beam 1 is provided with a high floor support rib 113 for supporting the high floor assembly 7; in addition, the inner end surface of the horizontal section 12 of the connecting beam 1 has a low floor support rib 121 to support the low floor assembly 4. When the whole underframe is assembled and welded, the high floor support rib 113 and the low floor assembly 4 can respectively play a role in preassembling and positioning the floor, the assembly precision among the components is ensured through the structure, and an operator can conveniently perform subsequent welding and fixing; in addition, the weld joints between the high floor and the low floor and the connecting beam 1 are designed reasonably in different dimensions, for example, but not limited to, the weld joints between the end parts of the high floor component 7 and the low floor component 4 and the connecting beam 1 and the lap joint positions of the connecting beam and the corresponding support ribs can be formed according to the specific product design requirements, and therefore, the connecting strength at the corresponding positions is ensured.

It should be noted that the terms "low floor composition" and "high floor composition" herein refer to the case where the high and low floor bodies are not formed by a single composition, i.e. the case where the high and low floor bodies are spliced by a plurality of sectional materials, and the case where the floor support beams are correspondingly included.

In addition, as shown in fig. 3, the inner edge of the top surface of the horizontal section 11 of the connection beam 1 has a depressed low floor engaging table 122. Thus, after the built-in floor cloth is laid, the connecting position of the built-in floor cloth and the connecting beam 1 is completely covered, the whole low floor area is in a pure flat state, and the possible adverse effect on the welding position in the use process is avoided.

Wherein, the high floor support rib 113 and the low floor support rib 122 are both horizontally arranged, that is, are formed by extending horizontally along the longitudinal direction from the body of the connecting beam 1. As shown in fig. 3, preferably, a distance a from the high floor bracket rib 113 to the top surface of the vertical section 11 corresponds to a height of the high floor assembly 7, and a distance b from the low floor bracket rib 122 to the low floor ledge 122 of the horizontal section 12 corresponds to a height of the low floor assembly 4. So that the surface is smooth after the floor is laid, and the in-vehicle configuration is more convenient.

It should be noted that the high floor assembly 7 between the two draft sill 3 and the corresponding side sill 2, and the low floor assembly 4 between the two side sills 2, may be formed by a plurality of flat plate-like profiles that are transversely spliced together. Specifically, the setting number can be determined according to different vehicle types and the selection cost of the section bars, for example, but not limited to, the high floor composition 7 is symmetrical along the center line of the vehicle body, each side is formed by splicing two aluminum alloy double-layer hollow section bars, two sides are welded with the side beams 2 and the traction beams 3, and the head and the tail are lapped with the connecting beam 1 and the sleeper beam 5; the low floor component 4 is formed by splicing and welding five aluminum alloy double-layer hollow sections in the vehicle width direction, two sides of the low floor component are welded with the edge beam 2, the head and the tail of the low floor component are lapped with the connecting beam 1, the low floor area is pure and flat after lapping, and the built-in floor cloth can be conveniently and directly laid subsequently. In addition, the construction is easy, the passenger seats are easy to arrange, and relatively better passenger capacity can be formed.

In addition, the high-low floor chassis structure provided by the scheme further comprises a lifting seat 9. Referring to fig. 6, which is a schematic view of a structure of a raised and lowered floor frame from another view, a side sill 2 is omitted from fig. 6 to clearly illustrate a specific installation position of the saddle 9.

The two saddle 9 are symmetrically arranged relative to the longitudinal center line of the vehicle body, and are specifically arranged at the intersection of the end part of the connecting beam 1 and the corresponding side edge beam 2, and each saddle 9 is fixedly connected with the outer end surface of the vertical section 11 of the connecting beam 1 and the inner end surface of the edge beam 2 respectively. So set up, when realizing that the large-tonnage lifts the car function, still have the function of this connection area intensity of reinforcement concurrently.

Specifically, the high-low floor chassis structure provided by the scheme preferably adopts aluminum alloy profiles for welding connection of all the components, has the characteristics of light weight and high rigidity, enables the chassis transition structure to have high strength and rigidity, and further ensures the transmission of loads in high-low floor areas based on material selection.

In this scheme, boundary beam 2 comprises upper and lower two part section bars on the whole: the upper edge beam 21 and the lower edge beam 22 are respectively formed by welding two aluminum alloy sections in a splicing manner and are in natural transition in high and low floor areas. Theoretically speaking, based on the design concept of splicing and molding by using sectional materials, the underframe has the components in an assembly relationship, preferably forms a basic splicing or clamping adaptive relationship by using the sectional materials, and then is welded and fixed. It should be understood that it is within the scope of the claimed invention as long as the bearing capacity and the manufacturing cost can be effectively considered.

In addition to the above-described high-low floor underframe structure, the present embodiment also provides a railway vehicle including a vehicle body having a high-low floor, wherein the high-low floor adopts the high-low floor underframe structure as described above. It should be noted that other functions of the rail vehicle constitute non-core points of the invention, and those skilled in the art can implement the functions by using the prior art, so that detailed description is omitted herein.

In the description of the present invention, the terms "lateral", "longitudinal", "top" and "bottom" and the like indicate orientations or positional relationships that are defined based on a general reference of a vehicle body, and are only used for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention. Similarly, the terms "inner", "outer", and the like are used in an orientation to describe that the subject object forms a corresponding inner or outer side with respect to the center of the vehicle body.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A high-low floor underframe structure is used for a low-floor rail vehicle; it is characterized by comprising:

two side beams;

the two traction beams are symmetrically arranged on two sides of the longitudinal center line of the vehicle body;

the tie-beam, both ends respectively with both sides boundary beam fixed connection, the tie-beam is the section bar of transversal personally submitting "L" font to the configuration: in the lateral projection plane, the outer end faces of the vertical sections of the horizontal sections are fixedly connected with the inner ends of the two traction beams.

2. The structure of the high-low floor underframe according to claim 1, characterized in that a through opening is opened in the middle of the vertical section of the connecting beam, and the through opening is arranged opposite to the inclined floor arranged between the two traction beams; the inner side end of the inclined floor is fixedly connected with the outer end face of the vertical section below the through hole, and the outer side ends of the inclined floor and the two traction beams are fixedly connected with a sleeper beam.

3. The floor underframe structure of claim 2, wherein the cross section of the connecting beam is provided with an inclined reinforcing rib, the inclined reinforcing rib is consistent with the slope of the inclined floor, and the upper surfaces of the inclined reinforcing rib and the inclined floor are flush.

4. The raised floor substructure according to any of claims 1 to 3, wherein the outer end faces of the vertical sections of the connecting beams have raised floor-receiving ribs and the inner end faces of the horizontal sections of the connecting beams have lowered floor-receiving ribs.

5. The structure of high and low floor frames according to claim 4, wherein the horizontal section of the connection beam has a low floor engaging platform formed by a recess at the inner edge of the top surface thereof.

6. The structure of claim 5, wherein the high floor support rib and the low floor support rib are horizontally disposed, a distance from the high floor support rib to the top surface of the vertical section is the same as a height of the high floor assembly, and a distance from the low floor support rib to the low floor overlapping table of the horizontal section is the same as a height of the low floor assembly.

7. The structure of claim 6, wherein the high floor assembly between the two towing beams and the side beams on the corresponding sides, and the low floor assembly between the two side beams are formed by transversely and sequentially splicing a plurality of flat plate-shaped section bars.

8. The floor substructure of claim 7, further comprising a lift seat disposed at the intersection of the end of the connecting beam and the corresponding side of the edge beam, wherein the lift seat is fixedly connected to the outer end surface of the vertical section of the connecting beam and the inner end surface of the edge beam, respectively.

9. The raised and lowered floor substructure according to claim 1, wherein said horizontal sections of connecting beams are also used for supporting built-in steps.

10. Railway vehicle comprising a body with a high-low floor, characterized in that the high-low floor is of a high-low floor underframe structure according to any of claims 1-9.