CN113799810A

CN113799810A - Aluminum alloy double-layer motor train unit body structure and motor train unit

Info

Publication number: CN113799810A
Application number: CN202111186215.3A
Authority: CN
Inventors: 李林; 张艳杰; 李传胜; 景发明
Original assignee: CRRC Changchun Railway Vehicles Co Ltd
Current assignee: CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2021-12-17

Abstract

The invention provides an aluminum alloy double-layer motor train unit train body structure which comprises a floor, a side beam, a side wall, an end wall and a train roof, wherein the floor comprises a lower floor and a middle floor, and the lower floor comprises end floors at two ends, an end closed structure and a middle floor; two sides of the middle floor are fixedly connected with the side walls, and the space in the vehicle body is divided into an upper guest room and a lower guest room; the side wall, the boundary beam and the floor structure are matched with each other, a plurality of windows are respectively arranged at the upper passenger room position and the lower passenger room position in the middle of the side wall, and the two ends of the side wall are provided with a kicking door and an equipment installation door. The invention can provide the accommodation space of the upper and lower passenger rooms of the vehicle, and the accommodation space of the passenger room is almost doubled.

Description

Aluminum alloy double-layer motor train unit body structure and motor train unit

Technical Field

The invention belongs to the technical field of rail vehicle manufacturing, and particularly relates to an aluminum alloy double-layer motor train unit body structure and a motor train unit.

Background

The existing motor train unit train body is of a single-layer train body structure, is made of aluminum alloy, is formed by assembling and welding large hollow aluminum alloy sections, is of a thin-wall cylindrical integral bearing structure, mainly comprises a roof, side walls, end walls, an underframe and other large parts, and each large part comprises a thin-wall hollow section which is basically equal to the train body in length.

With the development of economic society, some lines with dense passenger flow or trunk lines or branch lines of trains are difficult to continue to be opened due to the limitation of line density and junction capacity, tickets are often very tight, the problem of solving the problem needs to increase the accommodating space of train bodies and increase the number of passengers in guest rooms of motor train units, and two increasing methods are provided, namely increasing the length of the trains and increasing the number of layers of the trains. Due to the influence of terrain and lines, no space is added after the length of the train is increased to a certain extent, the increase of the number of layers of the train is a subject to be researched, and the method is not applied to the field of motor train units at present.

Disclosure of Invention

The invention aims to solve the problems that the traditional motor train unit train body has small accommodating space and the number of passengers can not meet the requirement, so that the invention provides a double-layer motor train unit train body structure and a motor train unit, which can provide accommodating spaces for upper and lower passenger rooms of a vehicle, greatly increase the accommodating space of the passenger rooms and ensure smooth travel of people.

In order to achieve the purpose, the invention provides an aluminum alloy double-layer motor train unit train body structure which comprises a floor, a side beam, a side wall, an end wall and a train roof, wherein the floor comprises a lower floor and a middle floor, and the lower floor comprises end floors at two ends, an end closed structure and a middle floor; the edge beam comprises an end edge beam and a middle edge beam, the end edge beam is an L-shaped section bar, and the middle edge beam is a plate-shaped hollow closed section bar; the end floor is arranged between the middle floor and the middle floor in the vertical direction, is a plate-shaped section, and is fixedly connected with the lower sides of the side walls through L-shaped end edge beams at two sides; the middle floor is of an arc ship-shaped structure, the upper side of the middle floor is flush with the lower surfaces of the end edge beams, and the middle floor is connected with the side walls through the middle edge beams; two ends of the middle edge beam are fixedly connected with the L-shaped corners of the end edge beams, and the outer sides of the middle edge beam and the end edge beams are flush; the upper side of the end edge beam is higher than that of the middle edge beam, and the whole edge beam is in a height fluctuation shape; the adjacent end parts of the end part floor and the middle part floor are respectively connected with two ends of an end part closed structure, and the end part closed structure is an inclined plane; the middle floor is arranged at the upper part of the middle floor, and two sides of the middle floor are fixedly connected with the side walls to divide the space in the vehicle body into an upper guest room and a lower guest room; the shape of the lower part of the side wall is matched with the upper side of the side beam, a plurality of windows are respectively arranged at the upper passenger room position and the lower passenger room position in the middle of the side wall, and a door for pedaling the vehicle and an equipment installation door are arranged at the two ends of the side wall.

The end part closed structure is formed by two L-shaped sectional materials, the middle part of the end part closed structure is an inclined plane, the upper part and the lower part of the end part closed structure are horizontal sectional materials extending towards two sides, the upper end part and the lower end part of the end part closed structure are fixedly connected with an end part floor and a middle part floor respectively, two sides of the end part closed structure are assembled and welded with two vertical edges of an arc ship-shaped structure of the middle part floor, a downward slope is formed at the connecting position of the end part floor and the middle part floor, and the lower part of the end part closed structure can conveniently enter a lower passenger room.

The side wall comprises a plurality of longitudinal sectional materials, namely an upper sectional material, a support sectional material, a lower sectional material I and a lower sectional material II which are fixedly connected in sequence; the middle part of the supporting section bar is fixedly connected with the middle floor.

Support section bar (104) middle part at the side wall is T type section bar, and it is equipped with middle part extending structure (1041) towards carriage inside, middle level floor (6) and middle part extending structure (1041) fixed connection avoid the corner of middle level floor and side wall with the interface position, avoid stress concentration.

The horizontal end of the end part boundary beam is provided with a transverse rib structure which is connected with the end part floor and takes the equipment installation door opening into consideration, the transverse rib structure is of a height fluctuation structure, the high part and the middle floor keep the same height, the outer side is slightly lower, and the height of the transverse rib structure is consistent with the height of the lower part of the equipment installation door opening.

The vertical end of the end edge beam is provided with a reinforcing transverse rib for reinforcing the strength of the door opening of the vehicle door by a passenger.

The corner of the end part edge beam profile is the same as the middle part edge beam profile in structure and is provided with two square cavities, and the end part edge beam and the middle part edge beam can be well connected into a whole.

The invention has the advantages and positive effects that:

on the basis of keeping the drum-shaped section profile structure combining the existing straight line and the arc line, the outer profile of the section of the motor train unit adjusts the inclination angle of the side wall and heightens the section of the motor train unit, so that the section profile of the motor train unit is higher and the accommodating space is larger. Especially when the double-layer passenger room is designed into a double-layer structure, the upper and lower passenger room accommodating spaces of the vehicle can be provided, and the passenger room accommodating space is almost doubled.

The inside middle floor and the lower floor that are provided with of automobile body section, the variable cross section functional structure along on the vehicle length direction is realized with the automobile body middle part at automobile body both ends, and both ends are the individual layer automobile body, and the middle part is double-deck automobile body, satisfies different functional requirements on the different sections. The passenger room accommodating space is greatly increased, and key interfaces of the vehicle body, a bogie, a door and other parts are guaranteed not to be changed.

The connecting part of the middle floor and the side wall adopts a T-shaped supporting section bar, so that the connecting interface of the middle floor and the side wall avoids the corner position of the middle floor and the side wall, and the stress concentration is prevented.

In order to realize the structural integrity as much as possible, the section of the side wall part section bar is provided with a changeable connecting interface structure, the section of the complete section bar provides a connecting interface structure, and the connecting interface structure can be changed into another connecting interface by a local material removing mode to meet different connecting requirements.

Drawings

FIG. 1 is a cross-sectional outline profile of a vehicle body;

FIG. 2 is an isometric view of the vehicle body structure;

FIG. 3 is an exploded view of the vehicle body structure;

FIG. 4 is a view of a double-deck cross-section of the vehicle body;

FIG. 5 is a single-layer cross-sectional view of the vehicle body;

FIG. 6 is a cross-sectional view of a middle floor;

FIG. 7 is a view of the connection of the end bottom plate to the side rail;

FIG. 8 is a schematic view of a closed end construction;

FIG. 9 is a cross-sectional view of the end closure structure;

FIG. 10 is a schematic view of a mid-level floor construction;

FIG. 11 is a cross-sectional view of a two-layer structure body side wall;

FIG. 12 is a cross-sectional view of a single layer vehicle body side wall;

FIG. 13 is a cross-sectional view of the end sill;

FIG. 14 is a cross-sectional view of the center sill;

FIG. 15 is a sectional view of a double-layer structure of a side wall support section of a vehicle body;

FIG. 16 is a sectional view of a middle section of a side wall of a vehicle body having a single-layer structure;

FIG. 17 is a sectional view of the lower section II;

FIG. 18 is a cross-sectional view of lower section III;

FIG. 19 is a cross-sectional view of the roof;

wherein: 1. a side wall; 2. a lower floor; 3. a boundary beam; 4. an end wall; 5. a vehicle roof; 6. a middle floor;

101. the passenger kicks the door; 102. an equipment installation door; 103. an upper section bar; 104. supporting the section bar; 105 lower section bar i; 106. a lower section II; 107. a middle section bar; 108. a lower section bar III; 1041. a protruding structure;

201. an end floor; 202. an end closure structure; 203. a middle floor;

301. an end edge beam; 302. a middle edge beam; 3011. reinforcing the transverse ribs; 3012. erecting the ribs vertically; 3013. a transverse rib structure;

501. the two side profiles of the car roof.

Detailed Description

Referring to fig. 1, the whole section of the car body adopts a conventional drum-shaped profile, namely, a drum-shaped section profile structure with the outer profile combined by a straight line and an arc line is kept, so that the good aerodynamic performance of the car is ensured, the manufacturability of the car manufacturing is considered, the outer profile of the section of the car body is increased to 4500mm, the inclination angle of the side wall 1 is adjusted to 3 degrees on the premise of ensuring that the width of the car body is 3360mm, and the upper part of the section of the car body is widened. So that the upper-layer accommodation space of the vehicle body is widened.

In order to realize the connection and installation of the end area of the vehicle body and the bogie and the convenience of passengers for getting into the vehicle from the end of the vehicle, the end area of the vehicle body still keeps a single-layer vehicle body structure; the middle vehicle body area between the two bogies is a main passenger accommodating area, and the whole area of the section of the part of the vehicle is designed into a double-layer structure of an upper passenger room space and a lower passenger room space, so that the vehicle accommodating space is improved.

Referring to fig. 2 to 9, the entire vehicle body structure includes a floor, side members 3, side walls 1, end walls 4, and a roof 5. The floor comprises a lower floor 2 and a middle floor 6, the lower floor 2 comprising end floors 201 at both ends, end closure structures 202 and a middle floor 203. The edge beam 3 comprises an end edge beam 301 and a middle edge beam 302, wherein the end edge beam 301 is an L-shaped profile, and the middle edge beam 302 is a plate-shaped hollow closed profile. The end floor 201 is a plate-shaped section, the end floor 201 is arranged between the middle floor 6 and the middle floor 203 in the vertical direction, and two sides of the end floor are fixedly connected with the lower side of the side wall 1 through L-shaped end edge beams 301; the middle floor 203 is of an arc ship-shaped structure and is formed by butt welding a plurality of sectional materials, the middle floor is arranged at a position lower than the end part floor 201, the upper side of the middle floor is flush with the lower surface of the end part edge beam 301, and the middle floor is connected with the side wall 1 through the middle edge beam 302; the end floor 201 and the middle floor 203 are connected by an end closing structure 202 for closing the end of the lower floor.

The end part closed structure 202 is formed by assembling and welding two L-shaped sectional materials, the middle part is an inclined plane, the upper part and the lower part are horizontal sectional materials extending towards two sides, the sectional materials at the upper plane position and the lower plane position are respectively assembled and welded with the middle floor 203 and the end part floor 201, the two sides are assembled and welded with two vertical sides of an arc ship-shaped structure of the middle floor 203, a downward slope is formed at the connecting position of the end part floor 201 and the middle floor 203, and passengers enter a lower passenger room along the slope. The end part closed structure 202 is arranged to be an inclined structure, the inclined structure ensures that the upper part of the inclined structure is inclined to the bogie when the inclined structure has enough safety distance with the bogie, so that the space between the inclined structure and the bogie is reduced, and the aerodynamic performance of a vehicle during running is improved. The connection parts of the upper end and the lower end of the end part closed structure 202 are provided with groove-shaped connection structures, the end parts can respectively extend into the upper floor plate cavity and the lower floor plate cavity and are provided with welding back supports, the connection welding implementation with the upper floor plate and the lower floor plate is realized, and the welding performance is ensured.

Referring to fig. 10, the sectional view of the middle floor 6 is shown, the middle floor 6 is formed by combining a plurality of hollow sections, both sides of the middle floor are provided with lap joint structures to realize connection with the side wall extension structures 14, the upper floor is not only the floor of the upper passenger room but also the top plate of the lower passenger room, and the upper and lower surfaces of the floor are integrated with common exposed or embedded sliding groove structures 601 to provide installation interfaces of the internal structures of the upper and lower passenger rooms, and to provide an installation interface of the top structure of the lower passenger room.

Referring to fig. 2, 3, 13 and 14, the boundary beam includes end boundary beam 301 and middle boundary beam 302, end boundary beam 301 is L-shaped section bar, and its horizontal end has horizontal muscle structure 3013 that is connected with end floor 201 and gives consideration to equipment fixing door 102 open-ended, and horizontal muscle structure 3013 is the height undulation structure, and eminence and middle part floor keep same height, conveniently dock with middle part floor installation, and the outside is slightly low, realizes highly unanimous with equipment fixing door gate lower part. Still compromise the passenger on the tip boundary beam 301 and kick out door 101, the passenger is kicked out door 101 and is all set up in the tip both sides of automobile body, seriously influence the intensity of automobile body, in order to improve here gate intensity, horizontal muscle 3011 is strengthened in the vertical end setting of tip boundary beam 301 for the enhancement of gate intensity, vertical end upside connects side wall 1, the tip boundary beam still is equipped with the vertical grudging post 3012 of being connected with the middle part boundary beam, vertical grudging post 3012 and its outside muscle plate-type become two square cavities.

Referring to fig. 2, 3, 4, 5, 13 and 14, the middle side beam 302 is a plate-shaped hollow closed section bar, the section bar has two square cavities, the interior of the section bar is provided with oblique reinforcing ribs, and the structure of the section bar is the same as that of the corner of the end side beam L-shaped section bar. Middle part boundary beam 302 welded connection is between middle part floor 203 and side wall 1, and the square cavity department that two big small shapes are the same outside middle part boundary beam 302 length direction both ends and the vertical stud 3012 of tip boundary beam L type section bar corner assembly welding, can realize along automobile body length direction's complete butt joint like this, and the whole bearing capacity after the connection. The upper side of the end edge beam 301 is higher than that of the middle edge beam 302, and a height fluctuation shape is formed. The seam between the side wall 1 and the side beam 3 is horizontal along the vehicle length direction but has a seam with undulation, and the seam between the side wall 1 and the side beam 3 is higher in the position of the end part area, so that the seam is far away from the door corner area at the doorway of the end part, and the strength of the seam in the stress concentration area of the door corner is prevented from not meeting the requirement; the position of the middle area is lower, so that the opening position of a passenger room window at the lower layer of the car body can be conveniently and completely arranged on the side wall instead of the intersection seam of the side wall 1 and the side beam 3, and the product quality can be greatly improved.

Referring to fig. 3, 4 and 5, in addition to the edge beams 3 satisfying the connection with the sidewall 1, the edge beams in different regions also have their respective other functions. The end edge beam 301 has a wider and heavy structure, and ensures the connection and bearing between the vehicle body and the bogie at the end part of the vehicle body. The middle side beam 302 has a smaller section and a lighter structure, is in transitional connection with the side wall 1 and the lower floor 2 in the middle of the vehicle body, and realizes longitudinal bearing of the vehicle together with the end side beam 301. The smaller cross-section is advantageous in providing more interior space for the vehicle body.

Referring to fig. 11, 12 and 15 to 18, each side wall 1 is formed by assembling and welding a plurality of longitudinal profiles, including an upper profile 103, a support profile 104, a lower profile i 105, a lower profile ii 106, a middle profile 107 and a lower profile iii 108. Upper portion section bar 103 includes three platelike section bars, support section bar 104 is a T type section bar, include lower part section bar I105 at automobile body end side wall lower part section bar, lower part section bar II 106, include lower part section bar I105 at automobile body middle part lower part section bar, lower part section bar III 108, all side wall section bars are tailor-welded into the side wall, wherein the middle part extending structure 1041 of T type section bar is inside towards the carriage, be used for connecting middle level floor 6, the lower surface of extending structure 1041 section bar end is longer, form the interface of being connected with middle level floor 6, extending structure 1041 and the downside contained angle department of vertical board slowly pass through, the lower surface extends to the junction of vertical board strengthening rib, play the effect that increases support intensity. In order to be matched with the end part boundary beam 301 and the middle part boundary beam 302, the positions of two ends of the side wall 1 are slightly different, the middle position of the side wall 1 is matched with the middle part boundary beam 302, the thickness of the section bar of the middle part boundary beam 302 is larger than that of the section bar of the side wall, the thickness of the lower end of the lower part section bar II 106 at the middle position of the side wall 1 is gradually increased to be close to the thickness of the interface of the middle part boundary beam 302, smooth butt joint is facilitated, and sudden change of bearing stress caused by sudden change of section thickness is avoided. The thickness change part of the lower end of the lower section II 106 is machined at the end part of the side wall 1 to form a plate-shaped lower section III 108 with the same thickness, and the thickness of the upper part of the end edge beam 301 butted with the lower section III 108 is gradually reduced to be close to the interface of the lower section III 108, so that smooth butting is facilitated. The carriages at the two ends of the side wall are of a single-layer structure, so that the T-shaped supporting section bar 104 is not needed, and the middle extending structure of the supporting section bar 104 needs to be machined off to form a middle section bar 107. Two ends of the side wall 1 are provided with a kick door 101, an equipment installation door 102, and upper and lower passenger room windows. The headwall structure still employs a conventional single-deck body headwall. The support section bar 104 and the lower section bar II 106 provide a connecting interface structure, and the middle section bar 107 and the lower section bar III 108 are changed by locally removing materials, so that another connecting interface can be changed to meet the connection of different connecting interfaces.

Referring to fig. 19, the structure diagram of the cross section of the roof is that the roof is an inverted U-shaped and is an arc structure formed by assembling and welding a plurality of hollow sections, the thickness of the sections 501 at the two sides of the roof is larger than the thickness of the outer contour of the sections in the middle area, the weight is controlled within a reasonable range on the basis of improving the integral rigidity and strength of the vehicle body, and the sections 501 at the two sides of the roof are assembled and welded with the side walls.

The aluminum alloy double-layer motor train unit train body structure with the structure can be used for forming motor train unit trains with different groups according to needs, and is generally an eight-group motor train unit or a sixteen-group motor train unit.

Claims

1. An aluminum alloy double-layer motor train unit body structure comprises a floor, side beams (3), side walls (1), end walls (4) and a vehicle roof (5), and is characterized in that the floor comprises a lower floor (2) and a middle floor (6), wherein the lower floor (2) comprises end floors (201) at two ends, an end closed structure (202) and a middle floor (203); the edge beam (3) comprises an end edge beam (301) and a middle edge beam (302), the end edge beam (301) is an L-shaped section bar, and the middle edge beam (302) is a plate-shaped hollow closed section bar; the end floor (201) is arranged between the middle floor (6) and the middle floor (203) in the vertical direction, the end floor (201) is a plate-shaped section, and two sides of the end floor are fixedly connected with the lower side of the side wall (1) through L-shaped end edge beams (301); the middle floor (203) is of an arc ship-shaped structure, the upper side of the middle floor is flush with the lower surface of the end edge beam (301), and the middle floor is connected with the side wall (1) through the middle edge beam (302); two ends of the middle edge beam (302) are fixedly connected with the L-shaped corner of the end edge beam (301), and the outer sides of the two ends are flush; the upper side of the end edge beam (301) is higher than that of the middle edge beam (302), and the whole edge beam (3) forms a height fluctuation shape; the adjacent ends of the end part floor (201) and the middle part floor (203) are respectively connected with two ends of an end part closed structure (202), and the end part closed structure (202) is an inclined plane; the middle floor (6) is arranged at the upper part of the middle floor (203), and two sides of the middle floor are fixedly connected with the side walls (1) to divide the space in the vehicle body into an upper guest room and a lower guest room; the shape of the lower part of the side wall (1) is matched with the upper side of the boundary beam (3), a plurality of windows are respectively arranged at the upper passenger room position and the lower passenger room position in the middle of the side wall, and a door (101) for pedaling and a door (102) for installing equipment are arranged at the two ends of the side wall.

2. The aluminum alloy double-layer motor train unit body structure as claimed in claim 1, wherein: the end part closed structure (202) is a horizontal section bar which is composed of two L-shaped section bars, the middle part of the horizontal section bar is an inclined plane, the upper part and the lower part of the horizontal section bar extend towards two sides, the upper end part and the lower end part of the horizontal section bar are respectively fixedly connected with the end part floor (201) and the middle part floor (203), two sides of the horizontal section bar are assembled and welded with two vertical edges of an arc ship-shaped structure of the middle part floor (203), and a downward slope is formed at the connecting position of the end part floor (201) and the middle part floor (203).

3. The aluminum alloy double-layer motor train unit body structure as claimed in claim 1, wherein: the side wall (1) comprises a plurality of longitudinal sectional materials, namely an upper sectional material (103), a support sectional material (104), a lower sectional material I (105) and a lower sectional material II (106) which are fixedly connected in sequence; the middle part of the supporting section bar (104) is fixedly connected with the middle floor (6).

4. The aluminum alloy double-layer motor train unit body structure as claimed in claim 3, wherein: the middle part of the side wall of the support section bar (104) is a T-shaped section bar, the support section bar is provided with a middle extending structure (1041) facing the inside of the carriage, and the middle floor (6) is fixedly connected with the middle extending structure (1041).

5. The aluminum alloy double-layer motor train unit body structure as claimed in claim 1, wherein: the horizontal end of the end boundary beam is provided with a transverse rib structure (3013) which is connected with the end floor (201) and gives consideration to the opening of the equipment installation door (102), the transverse rib structure (3013) is of a height-fluctuation structure, the height of the transverse rib structure is kept to be the same as that of the middle floor, the outer side of the transverse rib structure is slightly lower, and the height of the transverse rib structure is consistent with that of the lower part of the door opening of the equipment installation door.

6. The aluminum alloy double-layer motor train unit body structure as claimed in claim 1, wherein: and a reinforcing transverse bar (3011) is arranged at the vertical end of the end edge beam (301).

7. The aluminum alloy double-layer motor train unit body structure as claimed in claim 1, wherein: the corner of the section bar of the end edge beam (301) has the same structure as the section bar of the middle edge beam (302), and the two corner section bars are both square cavities.

8. A motor train unit using the aluminum alloy double-layer motor train unit body structure as defined in any one of claims 1 to 7.