CN115782943A

CN115782943A - Underframe structure and rail vehicle

Info

Publication number: CN115782943A
Application number: CN202211475938.XA
Authority: CN
Inventors: 丁叁叁; 顾玉林; 林庆琳; 王万静; 杜俊涛
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-03-14
Anticipated expiration: 2042-11-23
Also published as: CN115782943B

Abstract

The invention discloses an underframe structure and a railway vehicle, wherein hollow sections forming a floor extend along the width direction of a vehicle body, the normal rigidity of the underframe structure is higher, the vehicle deformation caused by severe change of external airtight load during operation is reduced, two or more hollow sections can be assembled in advance to form a floor module, the floor module can be directly installed on the underframe during the assembly of the whole vehicle, the assembly efficiency of the whole vehicle can be improved, the floor module can have one or more sizes, and the installation interfaces are also approximately the same, so that the modular design of the floor is realized, and the production efficiency is improved.

Description

Underframe structure and railway vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to an underframe structure and a rail vehicle.

Background

Along with the continuous improvement of the running speed of the rail vehicle, particularly aiming at the working conditions of intersection of two vehicles and tunnel passing, the external airtight load born by the train is greatly improved; the drastic changes in the airtight load cause problems of equipment installation, internal stress, deformation of the vehicle body, and accompanying changes in the air pressure in the vehicle.

The airtight load is wrapped on the outer surface of the vehicle, and the normal rigidity of the vehicle is mainly required to be improved to reduce the deformation of the vehicle; the cross section of the rail vehicle mainly comprises a roof, side walls and an underframe, wherein the roof and the side walls of the high-speed train are generally arc-shaped cross sections, the normal stiffness is high, the underframe needs to provide an installation interface for equipment inside and outside the train, and is generally a wide plane, the normal stiffness is low, and therefore the stiffness of the underframe needs to be improved mainly when the normal stiffness of the vehicle is improved.

At present, a full-length double-layer aluminum alloy section structure is generally adopted for a high-speed train to improve the airtight bearing capacity, and the sections are longitudinally arranged; the installation of the equipment under the vehicle is divided into two modes: and the edge beam hanger and the cross beam hanger. In particular as shown in figure 1.

Present section bar longitudinal arrangement, the stud of unable make full use of aluminium alloy improves vehicle normal rigidity, promotes when train speed, and airtight load improves the back by a wide margin, and the floor warp great.

The side beam hanging mode: after the equipment under the vehicle is integrated, the equipment is completely hung at the sliding chute of the boundary beam, and the hanging mode has concentrated load and easily causes overlarge local stress; the lower part of the double-layer section bar floor is not supported, the floor of the underframe is deformed due to large airtight load, the equipment installation problem in the car is easily caused due to large deformation, the riding comfort is reduced, and the like.

How to overcome one of the above defects is a technical problem that the skilled person always focuses on.

Disclosure of Invention

The invention aims to provide an underframe structure with relatively high normal stiffness and small deformation and a railway vehicle.

The invention provides an underframe structure, which comprises two edge beams extending along the longitudinal direction, wherein a floor module is arranged between the two edge beams, the floor module comprises at least one hollow section, the hollow section is provided with an upper layer surface and a lower layer surface, a cavity extending along the transverse direction is arranged between the two surfaces, two ends of the hollow section are respectively and fixedly connected with the two edge beams, and the lower surface of at least part of the section main body of the hollow section is also provided with a hanging mounting seat integrally formed with the lower surface of the section main body of the hollow section, so that the hanging mounting seat is used for hanging equipment below a crane truck.

The hollow section bars forming the floor extend along the width direction of the vehicle body, so that the normal rigidity of the formed underframe structure is higher, the vehicle deformation caused by the drastic change of external airtight load during high-speed running is reduced, two or more hollow section bars can be assembled in advance to form the floor module, the floor module can be directly installed on the underframe during the assembly of the whole vehicle, the assembly efficiency of the whole vehicle can be improved, the floor module can have one or more sizes, the installation interfaces are also approximately the same, the modular design of the floor is realized, and the production efficiency is improved.

Optionally, a first hollow boss extending transversely is formed below part or all of the hollow section main body, the first hollow boss is of a hollow structure, and the hanging mounting seat is formed on the first hollow boss.

Optionally, part of the first hollow boss is provided with an avoidance notch to avoid the part at the corresponding position.

Optionally, the first hollow boss has a plurality of groups of bolt holes, each group of bolt holes forms the hanging mounting seat, and each group of bolt holes includes N threaded holes for connecting with bolts of an under-vehicle device.

Optionally, the upper surface part region of the hollow profile main body further has a second hollow boss integrally formed therewith.

Optionally, the first hollow boss and the second hollow boss are at least partially arranged oppositely, and projections of the first hollow boss and the second hollow boss in a horizontal plane where the floor module is located are at least partially overlapped.

Optionally, reinforcing ribs are formed inside the cavity and inside the cavities of the first hollow boss and the second hollow boss.

Optionally, each hollow profile body in the floor module is fixedly connected to form an integral structure by welding.

Optionally, the floor module further includes at least two sleepers, each sleeper extends transversely between the two side beams, two end portions of each sleeper are fixedly connected to the side beams on two sides, the sleepers are arranged at intervals along the longitudinal direction, and the floor module is fixed between the two sleepers.

In addition, the invention also provides a rail vehicle which comprises the equipment under the vehicle and the underframe structure of any one of the above parts, wherein the equipment under the vehicle is hoisted on the hanging mounting seat.

Drawings

FIG. 1 is a cross-sectional view of a prior art undercarriage configuration;

FIG. 2 is a partial schematic view of a chassis structure according to an embodiment of the invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic top view of the partial structure of FIG. 2;

fig. 5 is a bottom view of the partial structure of fig. 2.

Wherein, the one-to-one correspondence between the reference numbers and the part names in fig. 1 is as follows:

1' an aluminum profile; 2' edge beam; a 3' chute;

in fig. 2 to 5, the one-to-one correspondence between the reference numerals and the part names is as follows:

10 a floor module; 1, hollow section bar; 3 a first hollow boss; 31 hanging the mounting seat; 32 avoiding the notch; 2 a second hollow boss;

20 edge beams;

30 sleeper beams.

Detailed Description

On the basis of the research findings, the present document further seeks to propose a technical solution to solve the above technical problems.

In the description of the present application, it should be noted that, in the embodiments of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

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. 2 to 5, fig. 2 is a partial schematic view of a bottom chassis structure according to an embodiment of the present invention; FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2; FIG. 4 is a schematic top view of the partial structure of FIG. 2; fig. 5 is a bottom view of the partial structure of fig. 2.

The invention provides a rail vehicle, comprising an underframe structure and an under-car device, wherein the underframe structure comprises two longitudinal extending side beams 20, a floor module 10 is arranged between the side beams 20, and the floor module 10 comprises at least one hollow section bar 1. To facilitate the installation of the floor module 10, the underframe structure usually further comprises at least two sleepers 30, two ends of the two sleepers 30 are fixedly connected with the edge beams 20 and are arranged at intervals along the length direction of the car body, and the floor module 10 is usually installed between the two sleepers 30 of the underframe structure. The number of the hollow profiles 1 in one floor module 10 is reasonably set according to the distance between two sleepers 30, generally speaking, the number of the hollow profiles 1 in one floor module 10 is two or more, and each hollow profile 1 is fixed to form a whole by welding, which may be laser welding, but may also be other types of welding, such as friction welding, etc.

In this document, the longitudinal direction means the vehicle body length direction, and the lateral direction means the vehicle body width direction.

The hollow section bar 1 is provided with an upper layer surface and a lower layer surface, a cavity extending along the transverse direction is arranged between the two surfaces, two ends of the hollow section bar 1 are fixedly connected with the two side beams 20 respectively, in order to improve the use strength of the hollow section bar 1, reinforcing ribs can be arranged in the cavity, and the form of the reinforcing ribs is not limited herein.

The lower surface of the profile body of at least part of the hollow profile 1 of the invention is also provided with a hanging mounting seat 31 which is integrally formed with the profile body and is used for equipment under a sling cart. That is, the under-vehicle device of the present invention is hung and connected to the floor module 10, and the hanging mount 31 is integrally formed with the partially hollow section bar 1 of the floor module 10.

The hollow section bars 1 forming the floor extend along the width direction of the vehicle body, the normal rigidity of the chassis structure formed in the way is higher, the vehicle deformation caused by the drastic change of the external airtight load during high-speed operation is reduced, two or more hollow section bars 1 can be assembled in advance to form the floor module 10, the floor module 10 can be directly installed on the chassis during the whole vehicle assembly, the whole vehicle assembly efficiency can be improved, the floor module 10 can have one or more sizes, the installation interfaces are also approximately the same, the modular design of the floor is realized, and the production efficiency is improved.

Especially, when the cavity of the hollow section bar 1 is internally provided with the reinforcing ribs, the transverse arrangement of the hollow section bar 1 can further utilize the reinforcing ribs in the cavity, and the normal stiffness of the underframe structure is further improved.

In one embodiment, a first hollow boss 3 extending transversely is formed under part or all of the hollow section bar 1, the first hollow boss 3 is a hollow structure, and the hanging mounting seat 31 is formed on the first hollow boss 3. The first hollow boss 3 can further improve the strength of the hollow section bar 1, reduce the overall deformation, and prevent the strength of the hollow section bar 1 from being reduced due to the arrangement of the hanging mounting seat 31. The welding between the floor of the traditional railway vehicle and the hanging beam is avoided, the component precision is improved, and the welding deformation and the welding internal stress are avoided.

According to the arrangement of the equipment under the vehicle, part of the first hollow bosses 3 are provided with avoidance notches 32 to avoid parts at corresponding positions, so that the assembly flexibility of each part of the vehicle is improved.

In the above embodiments, the first hollow boss 3 has a plurality of sets of bolt holes, each set of bolt holes forms the hanging mounting seat 31, and each set of bolt holes includes N threaded holes for connecting with bolts of the under-vehicle equipment; as shown in the drawings, fig. 5 shows that three first hollow bosses 3 are provided in one floor module 10, and an avoidance gap 32 is provided on the middle first hollow boss 3, although the position and number of the avoidance gap 32 are determined according to the specific use environment and are not limited to the description herein. Three groups of bolt holes are arranged on each first hollow boss 3, and each group of bolt holes is provided with nine bolt holes.

In order to further improve the strength of the underframe structure and the rigidity of the hanging equipment position, in a specific embodiment, the upper surface part area of the main body of the hollow section bar 1 is also provided with a second hollow boss 2 which is integrally formed with the main body. The second hollow boss 2 may serve to reinforce the local structural strength of the hollow profile 1.

Similarly, the second hollow boss 2 can also be provided with an avoiding notch and other structures to meet the assembly requirements of corresponding side parts.

Specifically, the first hollow boss 3 and the second hollow boss 2 are at least partially arranged oppositely, and the projections of the two in the horizontal plane where the floor module 10 is located are at least partially overlapped. The figures show an embodiment in which the first hollow boss 3 and the second hollow boss 2 are arranged substantially opposite to each other, the first hollow boss 3 having a greater width of connection to the profile body than the second hollow boss 2.

Further, inside the die cavity, the inside all shaping of first cavity boss 3 and the die cavity of second cavity boss 2 have the strengthening rib, and the strengthening rib form is not limited as long as can provide the use intensity of structure can, reduce whole deformation.

As described above, the hollow section bar 1 bodies in the floor module 10 are fixedly connected by welding to form an integral structure, and laser hybrid welding can be used to reduce welding input and improve dimensional accuracy.

On the basis of the underframe structure, the invention also provides a railway vehicle which comprises under-vehicle equipment and the underframe structure in any embodiment, wherein the under-vehicle equipment is hung on the hanging mounting seat 31.

Other structures of the rail vehicle are not described herein in detail, please refer to the prior art.

The railway vehicle comprises the underframe structure, so the technical effect of the underframe structure is achieved.

The present invention provides an undercarriage structure and a railway vehicle. The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The utility model provides an underframe structure, its characterized in that includes two boundary beams along longitudinal extension, two be provided with the floor module between the boundary beam, the floor module includes at least one cavity section bar, the cavity section bar has upper and lower two-layer surface, has between the two surfaces along the die cavity of horizontal extension, the both ends of cavity section bar respectively with two boundary beam fixed connection to at least part the lower surface of the section bar main part of cavity section bar still has rather than integrated into one piece's the mount pad of hanging for equipment under the sling cart.

2. The chassis structure of claim 1, wherein a first hollow boss extending transversely is formed under part or all of the profile main body, the first hollow boss is of a hollow structure, and the hanging mounting seat is formed on the first hollow boss.

3. The chassis structure of claim 2, wherein a portion of the first hollow boss has an escape notch to escape a correspondingly positioned component.

4. The undercarriage structure according to claim 3 wherein said first hollow boss has a plurality of sets of bolt holes, each set of bolt holes forming said hanger mounting base and each set of bolt holes including N number of threaded holes for bolting to an under-vehicle equipment.

5. The underframe structure of claim 3 or 4, wherein the upper surface partial region of the hollow profile body further has a second hollow boss integrally formed therewith.

6. The chassis structure of claim 5, wherein the first hollow boss and the second hollow boss are at least partially disposed opposite each other, and projections of the first hollow boss and the second hollow boss in a horizontal plane in which the floor module is disposed at least partially coincide.

7. The chassis structure of claim 5, wherein the cavity interior, the cavity interior of the first hollow boss and the cavity interior of the second hollow boss are each formed with a stiffener.

8. The chassis structure of claim 7, wherein each of the hollow profiles in the floor module is fixedly connected by welding to form a unitary structure.

9. The underframe structure of any one of claims 1-4 and 6-8, further comprising at least two sleepers, each extending transversely between two of the side beams and having opposite ends fixedly connected to the side beams on opposite sides, the sleepers being spaced apart longitudinally, and the floor modules being fixed between the sleepers.

10. A rail vehicle comprising an under-car device, further comprising the undercarriage structure of any one of claims 1 to 9, wherein the under-car device is suspended from the suspension mount.