CN115782943B

CN115782943B - Chassis structure and rail vehicle

Info

Publication number: CN115782943B
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: 2023-08-22
Anticipated expiration: 2042-11-23
Also published as: CN115782943A

Abstract

The application discloses a chassis structure and a railway vehicle, wherein hollow sections forming a floor extend along the width direction of the vehicle body, the normal rigidity of the chassis structure formed by the application is higher, the deformation of the vehicle 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 arranged on the chassis during the whole vehicle assembly, the whole vehicle assembly efficiency can be improved, and the floor module can have one or more sizes and the same mounting interface, so that the modular design of the floor is realized, and the production efficiency is improved.

Description

Chassis structure and rail vehicle

Technical Field

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

Background

Along with the continuous lifting of the running speed of the rail vehicle, the external airtight load born by the train is greatly lifted especially for the working conditions of the intersection of two vehicles and the passage of a tunnel; the drastic change in the airtight load causes problems of equipment installation, internal stress, deformation of the vehicle body, and accompanying changes in the air pressure inside the vehicle.

The airtight negative load is wrapped on the outer surface of the vehicle, so that the deformation of the vehicle is reduced, and the normal rigidity of the vehicle is mainly required to be improved; the section of the railway 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 sections, the normal rigidity is high, the underframe is required to provide an installation interface for equipment inside and outside the train, and is generally a wide plane, and the normal rigidity is weak, so that the normal rigidity of the vehicle is improved, and the rigidity of the underframe is required to be improved.

At present, a general long double-layer aluminum alloy section bar structure is adopted for the high-speed train to improve airtight bearing capacity, and the section bars are longitudinally arranged; the installation of equipment under the vehicle is divided into two modes: side beam hanging and cross beam hanging. And is shown in particular in figure 1.

The vertical rigidity of the vehicle can not be improved by fully utilizing the vertical ribs of the aluminum profile when the current profile is longitudinally arranged, and when the speed of a train is improved and the airtight load is greatly improved, the floor is greatly deformed.

The side beam hanging mode is as follows: after the equipment under the vehicle is integrated, the equipment is hung at the side beam chute, and the hanging mode is concentrated in load and easy to cause overlarge local stress; the lower part of the double-layer section bar floor is unsupported, the underframe floor is deformed due to larger airtight load, the problem of installation of equipment in a vehicle is easily caused by larger deformation, the riding comfort level is reduced, and the like.

How to overcome one of the above drawbacks is a technical problem that the person skilled in the art is constantly focusing on.

Disclosure of Invention

The application aims to provide a chassis structure with relatively high normal rigidity and small deformation and a railway vehicle.

The application provides a underframe structure, which comprises two side beams extending longitudinally, wherein a floor module is arranged between the two side beams, the floor module comprises at least one hollow section bar, the hollow section bar is provided with an upper surface and a lower surface, a cavity extending transversely is arranged between the two surfaces, two ends of the hollow section bar are respectively fixedly connected with the two side beams, and at least part of the lower surface of a section bar main body of the hollow section bar is also provided with a hanging installation seat integrally formed with the lower surface of the section bar main body of the hollow section bar, so that the hollow section bar is used for lifting equipment under a 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 chassis structure is relatively high, the deformation of the vehicle caused by severe external airtight load change during high-speed running is reduced, two or more hollow section bars can be assembled in advance to form a floor module, the floor module can be directly arranged on the chassis during the whole vehicle assembly, the whole vehicle assembly efficiency can be improved, the floor module can have one or more sizes and the same mounting interface, the modular design of the floor is realized, and the production efficiency is improved.

Optionally, a part or all of the hollow profile main body is provided with a first hollow boss extending transversely, the first hollow boss is of a hollow structure, and the hanging installation seat is formed on the first hollow boss.

Optionally, part of the first hollow boss is provided with an avoidance gap so as to avoid parts at corresponding positions.

Optionally, the first hollow boss has a plurality of sets of bolt holes, each set of bolt holes forming the hanger mount, and each set of bolt holes includes N threaded holes in bolted connection with the equipment under the vehicle.

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

Optionally, the first hollow boss and the second hollow boss are at least partially disposed opposite to each other, and the projections of the first hollow boss and the second hollow boss in the horizontal plane where the floor module is located are at least partially coincident.

Optionally, reinforcing ribs are formed in the cavity, the first hollow boss and the second hollow boss.

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

Optionally, the floor system further comprises at least two sleeper beams, each sleeper beam transversely extends to be located between two side beams, two end portions are fixedly connected with the side beams on two sides, the sleeper beams are longitudinally arranged at intervals, and the floor module is fixed between the two sleeper beams.

In addition, the application also provides a railway vehicle, which comprises the under-vehicle equipment and the underframe structure, wherein the under-vehicle equipment is hoisted on the hanging installation seat.

Drawings

FIG. 1 is a cross-sectional view of a prior art chassis structure;

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

FIG. 3 is a cross-sectional view 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 one-to-one correspondence between the reference numerals and the component names in fig. 1 is as follows:

1' aluminum profile; 2' side beams; a 3' chute;

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

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

20 side beams;

30 sleeper beams.

Detailed Description

Based on the research findings, a technical scheme for solving the technical problems is further explored and proposed.

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 defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.

In order to make the technical solution of the present application better understood by those skilled in the art, the present application 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 schematic partial view of a chassis structure according to an embodiment of the application; FIG. 3 is a cross-sectional view 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 application provides a rail vehicle comprising a chassis structure and an under-vehicle device, wherein the chassis structure comprises two side beams 20 extending in a longitudinal direction, a floor module 10 is arranged between the two side beams 20, and the floor module 10 comprises at least one hollow profile 1. To facilitate installation of the floor module 10, the underframe structure generally further includes at least two side sills 30, both ends of the two side sills 30 are fixedly connected to the side sills 20 and are spaced apart along the length direction of the vehicle body, and the floor module 10 is generally installed between the two side sills 30 of the underframe structure. The number of hollow profiles 1 in one floor module 10 is mainly set reasonably according to the distance between two sleeper beams 30, in general, the number of hollow profiles 1 in one floor module 10 is two or more, each hollow profile 1 is fixed to form a whole by welding, and the welding can be laser welding, or other types of welding, such as friction welding, and the like.

The longitudinal direction herein means the longitudinal direction of the vehicle body, and the transverse direction means the width direction of the vehicle body.

The hollow section bar 1 has upper and lower two-layer surface, has the die cavity along transversely extending between the two surfaces, and the both ends of hollow section bar 1 are respectively with both sides roof beam 20 fixed connection, in order to improve the intensity of use of hollow section bar 1, can set up the strengthening rib in the die cavity, and the form of strengthening rib is not limited herein.

The lower surface of the profile body of at least part of the hollow profile 1 in the application is also provided with a hanging mounting seat 31 which is integrally formed with the profile body and is used for hanging equipment under a vehicle. That is, the under-vehicle apparatus of the present application is connected to the floor module 10 by hanging, and the hanging mount 31 is integrally formed with a part of the hollow profile 1 of the floor module 10.

The hollow section bar 1 forming the floor extends along the width direction of the vehicle body, the normal rigidity of the chassis structure formed by the method is higher, the deformation of the vehicle caused by severe external airtight load change during high-speed running 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 whole vehicle assembly, the assembly efficiency of the whole vehicle can be improved, the floor module 10 can have one or more sizes and installation interfaces which are approximately the same, the modular design of the floor is realized, and the production efficiency is improved.

In particular, when the reinforcing ribs are arranged in the cavity of the hollow section bar 1, the transverse arrangement of the hollow section bar 1 can further utilize the reinforcing ribs in the cavity, so that the normal rigidity of the underframe structure is further improved.

In a specific embodiment, a first hollow boss 3 extending transversely is formed below the main body of the hollow profile 1, the first hollow boss 3 is a hollow structure, and the hanging mount 31 is formed on the first hollow boss 3. The first hollow boss 3 can play a role in further improving the strength of the hollow profile 1, reduces the overall deformation, and does not reduce the strength of the hollow profile 1 due to the arrangement of the hanging mounting seat 31. The welding of the traditional rail vehicle floor 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 boss 3 is provided with an avoidance notch 32 so as to avoid parts at corresponding positions, and the assembly flexibility of all parts of the vehicle is improved.

In the above embodiments, the first hollow boss 3 has a plurality of groups of bolt holes, each group of bolt holes forming the hanging mount 31, and each group of bolt holes includes N threaded holes in bolt connection with the under-vehicle device; as shown in the figure, fig. 5 shows that three first hollow bosses 3 are provided in one floor module 10, and the avoidance notches 32 are formed on the middle first hollow boss 3, and of course, the positions and the number of the avoidance notches 32 are determined according to specific use environments, and are not limited to the description herein. Three groups of bolt holes are formed in each first hollow boss 3, and each group of bolt holes is provided with nine bolt holes.

In order to further increase the strength of the chassis structure and to increase the rigidity of the hanging device position, in a specific embodiment, the upper surface partial area of the hollow profile 1 main body is further provided with a second hollow boss 2 integrally formed therewith. The second hollow boss 2 may serve to enhance the local structural strength of the hollow profile 1.

In the same way, the second hollow boss 2 can also be provided with structures such as avoiding notches and the like so as to adapt to the assembly requirements of corresponding side parts.

In particular, the first hollow boss 3 and the second hollow boss 2 are at least partially oppositely arranged, and the projections of the two in the horizontal plane of the floor module 10 are at least partially coincident. The figure shows an embodiment in which the first hollow boss 3 and the second hollow boss 2 are arranged substantially opposite to each other, and the connection width of the first hollow boss 3 and the profile body is larger than the connection width of the second hollow boss 2 and the profile body.

Further, reinforcing ribs are formed inside the cavity, the first hollow boss 3 and the second hollow boss 2, the form of the reinforcing ribs is not limited, and the use strength of the structural member can be provided, so that the integral deformation is reduced.

As described above, the hollow profile 1 bodies in the floor module 10 are fixedly connected by welding to form an integral structure, so that laser hybrid welding can be used, welding input is reduced, and dimensional accuracy is improved.

On the basis of the underframe structure, the application also provides a railway vehicle, which comprises the underframe structure and the underframe device in any embodiment, wherein the underframe device is hoisted on the hanging installation seat 31.

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

The rail vehicle of the application comprises the underframe structure, so the rail vehicle also has the technical effects of the underframe structure.

The underframe structure and the railway vehicle provided by the application are described in detail. The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims

1. The utility model provides a chassis structure, its characterized in that includes two along vertical extension's boundary beam, 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 the die cavity along transversely extending between the two surfaces, the both ends of cavity section bar respectively with two boundary beam fixed connection, and 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 hanging mount pad for equipment under the sling cart.

2. The undercarriage structure of claim 1 wherein a portion or all of said profile body is formed with a first hollow boss extending transversely therefrom, said first hollow boss being of hollow construction, said hanger mount being formed in said first hollow boss.

3. The chassis structure of claim 2, wherein a portion of the first hollow boss has relief notches to relieve corresponding positioned components.

4. The undercarriage structure of claim 3 wherein said first hollow boss has a plurality of sets of bolt holes, each set of bolt holes forming said hanger mount, and each set of bolt holes including N threaded holes for bolting with an off-board device.

5. The chassis structure of claim 3 or 4, wherein the upper surface portion 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 oppositely disposed, and wherein the projections of the two in a horizontal plane in which the floor module is located at least partially coincide.

7. The chassis structure of claim 5, wherein the cavity interior, 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 said hollow profiles in said floor module are fixedly connected by welding to form a unitary structure.

9. The undercarriage structure of any one of claims 1-4, 6-8 further comprising at least two bolster beams, each bolster beam extending transversely between two of said side beams and having two ends fixedly connected to said side beams on either side, each bolster beam being longitudinally spaced with said floor module secured therebetween.

10. A rail vehicle comprising an under-vehicle apparatus, further comprising the undercarriage structure of any one of claims 1-9, the under-vehicle apparatus being suspended from the suspension mount.