CN111301443A - Double-deck vehicle and middle bearing structure thereof - Google Patents

Double-deck vehicle and middle bearing structure thereof Download PDF

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Publication number
CN111301443A
CN111301443A CN202010114512.6A CN202010114512A CN111301443A CN 111301443 A CN111301443 A CN 111301443A CN 202010114512 A CN202010114512 A CN 202010114512A CN 111301443 A CN111301443 A CN 111301443A
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China
Prior art keywords
horizontal
vertical
floor
support structure
intermediate support
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CN202010114512.6A
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Chinese (zh)
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CN111301443B (en
Inventor
刘永强
苏柯
张海波
苏永章
杨红波
田宇环
王赵华
王国锋
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CRRC Zhuzhou Locomotive Co Ltd
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CRRC Zhuzhou Locomotive Co Ltd
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Publication of CN111301443A publication Critical patent/CN111301443A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D1/00—Carriages for ordinary railway passenger traffic
    • B61D1/06—Carriages for ordinary railway passenger traffic with multiple deck arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/10—Floors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D19/00—Door arrangements specially adapted for rail vehicles
    • B61D19/02—Door arrangements specially adapted for rail vehicles for carriages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D23/00—Construction of steps for railway vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Transportation (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

A double-deck vehicle and an intermediate support structure thereof, the intermediate support structure comprising a base portion and a support portion; the supporting part comprises a first horizontal part, a first vertical part and a first inclined part connecting the first horizontal part and the first vertical part, and the first inclined part comprises a tail part arranged on the first horizontal part, a head part arranged at the top end of the first vertical part and a back part connecting the head part and the tail part; the back part comprises a lower back part and an upper back part, and the included angle between the upper back part and the horizontal plane is smaller than that between the lower back part and the horizontal part; a first inflection point is formed at the connecting position of the tail part and the lower back part, and a second inflection point is formed at the connecting position of the upper back part and the lower back part; the supporting part is also provided with a front supporting part, one end of the front supporting part is arranged on the upper back part, and the other end of the front supporting part is arranged on the first vertical part. The middle supporting structure can relieve the stress concentration degree of the door corner of the vehicle door, and can be matched with the installation of stairs, so that the space is saved.

Description

Double-deck vehicle and middle bearing structure thereof
Technical Field
The invention belongs to the technical field of railway vehicles, and relates to a double-layer vehicle and a middle supporting structure thereof.
Background of the invention is described.
The passenger room doors of the double-layer vehicle have two arrangement modes, wherein one mode is that the passenger room doors of the double-layer vehicle are positioned at the two ends of the vehicle in a middle-layer floor area close to the end part, such as a double-layer motor train unit body structure sensitivity research document shown in the cooperation of Zhan of university of large-area communication and Tangshan of China company; one is in the area of the subfloor, the door of the passenger compartment of a double-deck passenger car, such as the one described in application number EP3248853, is located close to the subfloor of the stairs. Since the door opening of the latter door is positioned at the position of the sudden change of the floor rigidity, the door angle of the latter door is generally easier to generate the stress concentration phenomenon than the former door. In order to solve the problem, the section bar at the corner of the door opening is thickened usually, but for the vehicle body of a large-scale central control structure, the thickening of the section bar means that the length direction of the whole vehicle can be thickened, and for the part of the non-door opening with small stress value, the invalid mass is increased indirectly, the lightweight of the vehicle body is not facilitated, and the energy consumption is increased.
In addition, in order to allow passengers to reach the upper floor space, stairs for walking up and down and installation structures thereof are provided. The existing stair mounting structure also comprises two types: one is to directly fix the stairs on the upper floor, the middle floor, the lower floor and the slope by means of mechanical connection such as riveting, bolts and the like. Another way is to provide a welded support structure comprising a base part arranged on the sloping floor, the subfloor and a support part for transferring longitudinal loads and providing an installation interface on the support part for connecting the subfloor and the subfloor, wherein a linear configuration is provided between the installation interface at the subfloor and the installation interface of the subfloor. Since stairways are usually arranged on a sloping floor between the middle and lower floors, the support structure tends to transmit large longitudinal load forces. Especially when the passenger room door is arranged in the position close to the lower floor of the stair, the load transferring effect of the supporting structure is more obvious, the requirement on the structural shape is higher, the effect of transferring the longitudinal load of the existing supporting structure is poor, and the problem of stress concentration of the door corner of the door cannot be solved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: when the door of the passenger room of the double-layer vehicle is arranged in the lower floor area close to the stairs, the double-layer vehicle and the middle supporting structure thereof can avoid the stress concentration of the door corner of the door, meet the requirement of the installation of the stairs and transfer longitudinal load.
The technical scheme adopted by the invention is as follows: an intermediate support structure comprising a base portion and a support portion; the supporting part comprises a first horizontal part, a first vertical part and a first inclined part connecting the first horizontal part and the first vertical part, and the first inclined part comprises a tail part arranged on the first horizontal part, a head part arranged at the top end of the first vertical part and a back part connecting the head part and the tail part; the back part comprises a lower back part and an upper back part, and the included angle between the upper back part and the horizontal plane is smaller than that between the lower back part and the horizontal part; a first inflection point is formed at the connecting position of the tail part and the lower back part, and a second inflection point is formed at the connecting position of the upper back part and the lower back part; the supporting part is also provided with a front supporting part, one end of the front supporting part is arranged on the upper back part, and the other end of the front supporting part is arranged on the first vertical part.
In the scheme, when the middle supporting structure is arranged on a double-layer vehicle, the head part is connected with the upper floor, the tail part is connected with the middle floor, and the base part is connected with the slope bottom plate and the lower floor; therefore, when the double-layer vehicle is subjected to longitudinal tension, the double-layer vehicle can be divided into an upper force flow and a lower force flow through the middle supporting structure, so that the door corner of the vehicle door positioned on the lower floor only needs to bear the lower force flow, and the stress concentration degree of the door corner of the vehicle door is relieved; secondly, due to the existence of the first inflection point and the second inflection point, the upper force flow can be transmitted to the first vertical part through the back part and the front supporting part, so that the stress distribution of the whole supporting part is uniform; finally, the first inclined part can be matched with the installation of the stairs, so that the space is saved.
Preferably, the back part is connected with the head part through the neck part, and the thickness of the neck part, the thickness of the back part and the thickness of the vertical part are sequentially reduced, so that the uniform distribution of force on the supporting part is facilitated.
Preferably, the other end of the front supporting part is arranged at the joint of the first vertical part and the first horizontal part, so that the stability of the supporting part can be enhanced.
Preferably, the first inflection point is disposed near an intersection of extension lines of the outer side of the lower back and the inner side of the upper back, and closer to the base portion, whereby the position of the first inflection point can be adjusted by adjusting the thickness of the back portion, so that the back portion and the first vertical portion are uniformly stressed.
Preferably, the base part comprises a second horizontal part, a third horizontal part, a second vertical part and a second inclined part, the length of the second horizontal part is greater than that of the third horizontal part, one end of the second horizontal part is connected with one end of the third horizontal part through the second vertical part, and the other end of the second horizontal part is connected with the other end of the third horizontal part through the second inclined part; the second horizontal part is fixedly connected with the first horizontal part of the supporting part, and the second vertical part is fixedly connected with the first vertical part of the supporting part and is positioned on the same vertical plane.
In the scheme, the second inclined part is used for being connected with the slope bottom plate, and the third horizontal part is connected with the lower floor, so that sufficient rigidity support is provided for the supporting part; the arrangement of the connecting part is favorable for enhancing the rigidity of the base.
Preferably, the middle supporting structure is formed by two triangular supporting plates which are arranged in parallel and fixedly connected, each supporting plate is divided into an upper part and a lower part through an imaginary horizontal line, wherein the upper part of the supporting plate is provided with at least two through holes to form a supporting part; the lower support plate is provided with at least one through hole to form a base part.
Preferably, the supporting plate forming the first inclined portion is connected through a back cover plate, the supporting plate forming the first vertical portion and the supporting plate forming the second vertical portion are connected through an abdomen cover plate, the supporting plate forming the front supporting portion and the supporting plate forming the first horizontal portion are connected through an intermediate connecting plate, and a plurality of U-shaped holes are formed in the back cover plate, the abdomen cover plate and the intermediate connecting plate.
On the basis of satisfying two backup pad fixed connection, for the cooperation rigidity needs, all seted up a plurality of U type holes at back apron, belly apron and intermediate junction board.
The invention also provides a double-layer vehicle which comprises a vehicle body, a staircase, an upper floor, a middle floor, a slope bottom plate, a lower floor and the middle supporting structure, wherein the head part of the middle supporting structure is connected with the connecting section bar of the upper floor, the tail part of the middle supporting structure is connected with the middle floor, and the base part is fixed on the slope bottom plate and the lower floor; the handrail portion of stair includes handrail and handrail portion intermediate layer, the inside of handrail portion intermediate layer is hollow structure, and the width is greater than middle bearing structure's width, the last mounting structure who is equipped with the handrail of middle bearing structure.
In the arrangement, the middle supporting structure can meet the requirement of stair installation while bearing the longitudinal force of the vehicle.
Preferably, a passenger room door opening is arranged at a position close to a lower floor of the stair, a lower door corner of the passenger room door opening is step-shaped, and the step length of the lower door corner is more than 100 mm; thereby effectively relieving the stress of the door corner.
Preferably, the width of the connecting section bar of the upper floor is smaller than that of the upper floor, and arc transition is arranged at two ends of the connecting section bar; thereby playing a rigidity transition role and avoiding the problem of overlarge stress at the welding seam caused by the connection of the head of the middle supporting structure and the main structure of the upper floor.
The invention has the beneficial effects that: 1) the middle supporting structure skillfully utilizes bionics, refers to the squatting postures of animals such as bears, tigers and the like, and is designed into an upper part and a lower part for sharing the stress of the back to the vertical part, and the front supporting structure is arranged, so that when a vehicle is longitudinally pulled and pressed, the structural stress of the back and the vertical part of the middle supporting structure are uniformly distributed, the material utilization rate is improved on the premise of meeting the strength requirement, and the light weight of the vehicle body is further realized; 2) by arranging the middle supporting structure, the stress concentration degree of a door corner of the vehicle door can be effectively relieved, so that the thickness of a section profile of the vehicle body is properly reduced, and the light weight of a vehicle is favorably realized; 3) the middle supporting structure forms a certain angle with the center line of the vehicle body and is matched with the shape of the built-in stairs, so that the mounting requirement of the stairs can be met, and the interior attractiveness of the vehicle is improved; 4) the middle supporting structure is simple and easy for modular production.
Drawings
FIG. 1 is a schematic view of an intermediate support structure of the present invention;
FIG. 2 is an internal schematic view of the intermediate support structure of the present invention;
FIG. 3 is a front view of the intermediate support structure of the present invention;
FIG. 4 is a schematic structural view of a double-deck vehicle body of the present invention;
FIG. 5 is a cross-sectional view taken along direction A of FIG. 4 (including built-in);
FIG. 6 is a cross-sectional view B-B of FIG. 4 (including built-in);
FIG. 7 is a cross-sectional view C-C of FIG. 6;
FIG. 8 is a schematic view of the intermediate support structure of the present invention in connection with a vehicle body;
fig. 9 is a partially enlarged view of a portion I in fig. 8.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1 to 3, the intermediate support structure 2 is composed of two parallel support plates 21, a back cover plate 22, a plurality of intermediate connection plates 23, an abdomen cover plate 24 and a head connection plate 25. The intermediate support structure 2 is divided into two regions, a support portion a and a base portion B, with an imaginary horizontal line C as a boundary. The area above the horizontal line C is a supporting part A; the area below the horizontal line C is the base portion B.
The structure of the supporting part A is specifically as follows: the upper part of the support plate 21 is provided with a head part 2a for connecting with the upper floor 13; a neck part 2b is arranged obliquely below the head part 2 a; the part for connecting the middle floor 11 is a tail part 2 d; the part connecting the neck part 2b and the tail part 2d is a back part 2c, and the head part 2a, the neck part 2b, the back part 2c and the tail part 2d form a first inclined part of the supporting part A; the portion which is perpendicular to the upper floor 13 and is located below the neck portion 2b is a first vertical portion 2 f-1; the portion connecting the first vertical portion 2f-1 and the tail portion 2d is a first horizontal portion 2 g-1; the back 2c comprises a lower back 2c-2 and an upper back 2c-1, and the part connecting the upper back 2c-1 and the first vertical part 2f-1 is a front support part 2 e; a first inflection point N is formed at the position where the tail part 2d is connected with the lower back part 2c-2, a second inflection point L is formed at the position where the upper back part 2c-1 is connected with the lower back part 2c-2, and the included angle between the upper back part 2c-1 and the horizontal plane is smaller than that between the lower back part 2c-2 and the horizontal plane; preferably, the first inflection point N and the second inflection point L are rounded.
Above-mentioned support position A has utilized bionics, has used for reference the appearance of squatting of animals such as bears, tiger lion promptly, and there are two flex points from the top down between back 2c to afterbody 2d, be second flex point L and first flex point N respectively, and wherein first flex point N is for second flex point L to the position shrink of first vertical portion 2f-1, is favorable to transmitting first vertical portion 2f-1 the power of back 2c from fore-stock portion 2e for the vehicle is when receiving vertical tension pressure, and the stress distribution of middle bearing structure's back 2c and first vertical portion 2f-1 is more even.
The neck thickness h2, back thickness h1, and first riser thickness h3 are sequentially decreasing in value as compared to thickness, which facilitates even distribution of force.
The first inflection point N is adjustable around the intersection point M of the extension lines of the outer side of the lower back 2c-2 and the inner side of the upper back 2c-1 according to the stress. When the force applied to the back 2c is large and the force applied to the first vertical portion 2f-1 is small, the positions of the second inflection point L and the first inflection point N can be adjusted in addition to the values of the neck height h2, the back height h1, and the first vertical portion height h 3.
The base part B comprises a second horizontal part 2g-2, a third horizontal part 2g-3, a second vertical part 2f-2 and a second inclined part 2h, the second horizontal part 2g-2 is fixedly connected with the first horizontal part 2g-1, and the second vertical part 2f-2 is fixedly connected with the first vertical part 2f-1 and is positioned on the same vertical plane; the third horizontal portion 2g-3 is for connection to the subfloor 12 and the second inclined portion 2h is for connection to the ramp floor 14; a connecting part is also arranged between the second horizontal part 2g-2 and the second inclined part 2 h. Wherein the second horizontal part 2g-2 and the first horizontal part 2g-1 provide a base support with good rigidity for the whole support part A. The height h4 is preferably sufficiently large.
In this embodiment, the supporting plate 21 is a plate processed integrally, a plurality of triangular through holes are formed in the middle, three corners of each triangular through hole are all in an inverted arc shape, the radius of the arc is generally more than 50mm, and the plate width between each through hole and each through hole is between 100mm and 250 mm. The back cover plate 22 covers the upper portions of the two support plates 22, and the belly cover plate 24 covers the vertical surfaces of the two support plates 21. The outer edges of the dorsal and ventral cover plates 22, 24 are flush with the outer edges of the support plate 21. The middle connecting plate 23 is positioned in the center of the plate between the through holes of the two supporting plates 21 and the through holes and used for enhancing local rigidity, the length of the middle connecting plate 23 is close to that of the corresponding through hole edge, and enough welding space is ensured at the end part of the middle connecting plate 23. For matching the rigidity requirement, the back cover plate 22, the middle connecting plate 23 and the belly cover plate 24 are provided with U-shaped holes with different lengths and different intervals.
As shown in FIGS. 4 to 9, a double-deck vehicle comprises a vehicle body 1, a middle support structure 2, a stair handrail 3, a stair 4, a screen 5 and a seat 6. The floor structure of the vehicle body 1 comprises middle floors 11 positioned at two ends and lower floors 12 positioned in the center of the vehicle, and an upper floor 13, wherein the middle floors 11 are higher than the lower floors 12 and lower than the upper floors 13, a slope floor 14 is arranged between the middle floors 11 and the lower floors 12, a middle supporting structure 2 is arranged above the slope floor 14 and used for connecting and supporting the upper floors 13, and longitudinal force transmitted by the middle floors 11 is divided into an upper force flow and a lower force flow, so that the phenomena of huge stress concentration and local instability caused by rigidity mutation due to the fact that longitudinal force of a chassis is transmitted by the lower floors 12 alone are effectively relieved.
As shown in fig. 8 to 9, the middle support structure 2 is located above the sloping floor 14 and is connected to the middle floor 11, the lower floor 12 and the upper floor 13. At the end of the upper floor 13 is provided an upper floor connecting profile 131 for welding connection with a head connecting plate 25 at the head 2a of the intermediate support structure 2. The upper floor connecting section bar 131 is an integral piece with two ends of different heights, is integrally processed by a hollow section bar, and is matched with an included angle between the stair handrail part 3 and the center of the vehicle. Arc transition is arranged at two ends of the upper floor connecting section bar 131, and the welding seam stress of the upper floor connecting section bar 131 and the upper floor 13 is not overproof. The width of the upper floor connecting section bar 131 is narrower than that of the upper floor 13, so that the rigidity transition effect can be achieved, and the problem that the head 2a of the middle supporting structure 2 is directly connected with the main structure of the upper floor 13 to cause overlarge stress at a welding seam is solved.
A roof equipment mounting platform 1b is provided at both ends of the top of the vehicle body 1, i.e., above the middle floor 11, and a roof slope 15 is provided above the slope floor 14. Thus, some vehicle-mounted devices such as air conditioners, air cylinders, etc. can be mounted on the roof device mounting platform 1b while ensuring sufficient standing space for the upper floor 13. The door opening 1a of the passenger room of the vehicle body 1 is positioned at the lower floor 12 close to the slope floor 14, so that passengers at a low platform can get on and off conveniently.
Because the existence of top slope 15, slope floor 14, and the slope appears in same position of longitudinal direction about going up and down, make the vehicle great structural rigidity sudden change has appeared in length direction, can produce great stress concentration phenomenon in slope floor 14 near region, because the restriction of platform height simultaneously, will set up guest room door opening 1a again in this region, has aggravated the stress concentration degree more. The middle supporting structure 2 can fully play the role of vertical force supporting and the role of longitudinal force transmission, and effectively resist bending moment caused by rigidity mutation. In order to further relieve the door corner stress, the lower door corners 16 on both sides of the passenger room door opening 1a are set to be step-shaped, and the length t of the step of the door corner is preferably greater than 100mm, when the installation condition of the passenger room door equipment allows.
The stairs 4 form a certain included angle with the center of the vehicle, so that passengers can directly enter the floor between the seats 6 at the two sides after going upstairs and reaching the space of the upper floor, the space can be fully utilized, and the number of the seats is increased; meanwhile, the screen 5 is arranged at the end part of the seat 6, so that a unique bar counter atmosphere can be created, and the taste of modern people is met.
The stair 4 is provided with a stair handrail part 3 close to the vehicle center line side, the stair handrail part 3 and the vehicle center are also at a certain included angle, and the included angle of the stair handrail part is consistent with the included angle of the stair 4 and the vehicle center. The stair handrail part 3 comprises a handrail 31 and a handrail part interlayer 32, the inside of the handrail part interlayer 32 is of a hollow structure, the width d is slightly larger than the width of the middle supporting structure 2 so as to wrap the middle supporting structure 2 protruding out of the upper surface of the stair 4, and the middle supporting structure 2 is provided with a handrail mounting structure for fixing the handrail 31.

Claims (10)

1. An intermediate support structure comprising a base portion (B) and a support portion (a); the support part (A) comprises a first horizontal part (2g-1), a first vertical part (2f-1), and a first inclined part connecting the first horizontal part (2g-1) and the first vertical part (2f-1), wherein the first inclined part comprises a tail part (2d) arranged on the first horizontal part, a head part (2a) arranged at the top end of the first vertical part (2f-1), and a back part (2c) connecting the head part (2a) and the tail part (2 d); the back (2c) comprises a lower back (2c-2) and an upper back (2c-1), and the included angle between the upper back (2c-1) and the horizontal plane is smaller than that between the lower back (2c-2) and the horizontal plane; a first inflection point (N) is formed at the position where the tail part (2d) is connected with the lower back part (2c-2), and a second inflection point (L) is formed at the position where the upper back part (2c-1) is connected with the lower back part (2 c-2); the supporting part (A) is further provided with a front supporting part (2e), one end of the front supporting part (2e) is arranged on the upper back part (2c-1), and the other end of the front supporting part (2e) is arranged on the first vertical part (2 f-1).
2. An intermediate support structure as claimed in claim 1, characterised in that said back (2c) is connected to the head (2a) by a neck (2b) having a thickness (h)2) Thickness of the back (h)1) And the thickness (h) of the first vertical portion (2f-1)3) And decreasing sequentially.
3. An intermediate support structure as defined in claim 1, wherein the other end of the front support portion (2e) is provided at the intersection of the first vertical portion (2f-1) and the first horizontal portion (2 g-1).
4. An intermediate support structure as defined in claim 1, characterised in that said first inflection point (N) is located in the vicinity of the intersection (M) of the outer side of the lower back portion (2c-2) with the inner side extension of the upper back portion (2c-1) and closer to the base portion (B).
5. An intermediate support structure as set forth in any of claims 1 to 4, wherein the base portion (B) comprises a second horizontal portion (2g-2), a third horizontal portion (2g-3), a second vertical portion (2f-2), and a second inclined portion (2h), the second horizontal portion (2g-2) having a length greater than that of the third horizontal portion (2g-3), one end of the second horizontal portion (2g-2) being connected to one end of the third horizontal portion (2g-3) through the second vertical portion (2f-2), the other end of the second horizontal portion (2g-2) being connected to the other end of the third horizontal portion (2g-3) through the second inclined portion (2 h); the second horizontal part (2g-2) is fixedly connected with the first horizontal part (2g-1) of the supporting part (A), and the second vertical part (2f-2) is fixedly connected with the first vertical part (2f-1) of the supporting part (A) and is positioned on the same vertical plane.
6. An intermediate support structure as claimed in claim 5, characterized in that the intermediate support structure (2) is formed by two parallel and fixedly connected triangular support plates (21), each support plate (21) being divided into an upper and a lower part by an imaginary horizontal line (C), wherein the upper support plate is provided with at least two through holes forming the support part (A); the lower support plate is provided with at least one through hole forming a base portion (B).
7. An intermediate support structure as defined in claim 6, wherein the support plates forming the first inclined portion are connected by a back cover plate (22), the support plates forming the first vertical portion (2f-1) and the second vertical portion (2f-2) are connected by a belly cover plate (24), the support plates forming the front support portion (2e) and the support plates forming the first horizontal portion (2g-1) are connected by an intermediate connecting plate (23), and the back cover plate (22), the belly cover plate (24) and the intermediate connecting plate (23) are formed with a plurality of U-shaped holes.
8. A double-deck vehicle comprising a vehicle body (1), a staircase (4), an upper floor (13), a middle floor (11), a ramp floor (14) and a lower floor (12), characterized by further comprising an intermediate support structure (2) according to any of claims 1 to 7, the head (2a) of the intermediate support structure (2) being connected to the connecting profile (131) of the upper floor (13), the tail (2d) of the intermediate support structure being connected to the middle floor (11), the base part (B) being fixed to the ramp floor (14) and the lower floor (12); handrail portion (3) of stair (4) include handrail (31) and handrail portion intermediate layer (32), inside hollow structure that is of handrail portion intermediate layer (32), and the width is greater than the width of middle bearing structure (2), be equipped with the mounting structure of handrail (31) on the middle bearing structure (2).
9. Double-deck vehicle according to claim 8, characterized in that a passenger compartment door opening (1a) is provided near the lower floor (12) of the staircase (4), the lower door corner (16) of said passenger compartment door opening (1a) being stepped, and the step length (t) of the lower door corner (16) being greater than 100 mm.
10. Double-deck vehicle according to claim 8, characterized in that the width of the connecting profile (131) of the upper floor (13) is smaller than the width of the upper floor (13), and that the connecting profile (131) is provided with a circular arc transition at both ends.
CN202010114512.6A 2020-02-24 2020-02-24 Double-deck vehicle and middle bearing structure thereof Active CN111301443B (en)

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CN111301443B CN111301443B (en) 2021-02-05

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08108849A (en) * 1994-08-19 1996-04-30 Hitachi Ltd Body of railway rolling stock
CN101132962A (en) * 2005-01-19 2008-02-27 勃姆巴迪尔运输有限公司 Double-deck railway vehicle
EP1458603B1 (en) * 2001-12-24 2009-03-04 Bombardier Transportation GmbH Flights of stairs arrangement in a passenger vehicle
KR20160017471A (en) * 2014-08-06 2016-02-16 한국철도기술연구원 Double deck railway vehicle
EP3248853A1 (en) * 2016-05-26 2017-11-29 Bombardier Transportation GmbH Passenger transport vehicle
CN107738618A (en) * 2017-10-12 2018-02-27 中车唐山机车车辆有限公司 Stair and double-layer track car
CN207496581U (en) * 2017-11-16 2018-06-15 中车株洲电力机车有限公司 A kind of two-layer vehicle guest room staircase structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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