CN110077429A - A kind of guest room chassis interior structure for the city rail vehicle being readily disassembled - Google Patents
A kind of guest room chassis interior structure for the city rail vehicle being readily disassembled Download PDFInfo
- Publication number
- CN110077429A CN110077429A CN201910397065.7A CN201910397065A CN110077429A CN 110077429 A CN110077429 A CN 110077429A CN 201910397065 A CN201910397065 A CN 201910397065A CN 110077429 A CN110077429 A CN 110077429A
- Authority
- CN
- China
- Prior art keywords
- connection strap
- guest room
- layering
- floors
- aluminum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- 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
- B61D17/18—Internal lining, e.g. insulating
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of guest room chassis interior structures of city rail vehicle being readily disassembled, including side support shaft, connection strap, Layering of floors, floor cloth, aluminum honeycombfloor, rubber pad, the cold-proof materials bed of material, profile mounting base and vehicle body bottom frame, the vehicle body bottom frame is mainly made of the stringer that several crossbeams of the guest room bottom of vehicle and its both ends are welded, multiple profile mounting bases parallel with stringer are welded on several crossbeams, coldproof material layer is equipped on crossbeam between the profile mounting base, the upper surface of the cold-proof materials bed of material is equipped with rubber pad, aluminum honeycombfloor is covered with above rubber pad.The present invention can enable connection strap conveniently to take out when needing to dismantle by certain elasticity between connection strap, side wall panel and Layering of floors, improve the efficiency of disassembly.The application can also reduce the requirement on machining accuracy to Layering of floors fixation hole on vehicle body bottom frame, by adjustable connection strap, so that overall leveling aesthetic measure has obtained effective guarantee.
Description
Technical field
The present invention relates to a kind of production structure of city rail vehicle, the guest room bottom of specifically a kind of city rail vehicle being readily disassembled
Frame interior structure.
Background technique
Urban rail car refers to the rolling stock of high passenger capacity in city, belongs to the term of China's Mainland, is that city rail is handed over
The logical rolling stock used, in China's Mainland, since railway role has the obvious and clear division of labor, during ground rail must be taken on
It is long away from transport role, trans-city, transcounty or even transprovincially, subterranean railway then takes on city short distance transportation role, so subterranean railway
The vehicle used is commonly referred to as urban rail car, is an important component in urban public tranlport system.
Express, motor-car either between provinces and cities or the subway in urban district, the guest room of car are that its is manned important
Place, the guest room production of car is all to be filled fixation based on big vehicle body bottom frame at present, for convenience production, transport
And installation, side wall panel and bottom plate are all relied in blocks, and are used at present in the intersection of side wall and bottom
Compressed by the way that floor strip is unified, the problem of due to error, the height error between adjacent two pieces or interval muti-piece is sometimes
Wait very big, not smooth noisy solid enough in order to avoid installing, main settling mode is compressed by floor strip, but vehicle
The size of body chassis is very big, and the quantity multi-span of the fixation hole of floor strip is big, adjacent or remote several holes it
Between error once become larger, be bound to cause installation out-of-flatness and inaesthetic problem, do over again and necessarily cause waste of time and cost
Increase.
Summary of the invention
The purpose of the present invention is to provide a kind of guest room chassis interior structures of city rail vehicle being readily disassembled, on solving
State the problem of proposing in background technique.
To achieve the above object, the invention provides the following technical scheme:
A kind of guest room chassis interior structure for the city rail vehicle being readily disassembled, including side support shaft, connection strap, floor pressure
Item, floor cloth, aluminum honeycombfloor, rubber pad, the cold-proof materials bed of material, profile mounting base and vehicle body bottom frame, the vehicle body bottom frame are main
It is made of the stringer that several crossbeams of the guest room bottom of vehicle and its both ends are welded, multiple and stringer is welded on several crossbeams
Parallel profile mounting base is equipped with coldproof material layer, the upper table of the cold-proof materials bed of material on the crossbeam between the profile mounting base
Face is equipped with rubber pad, is covered with aluminum honeycombfloor above rubber pad, and aluminum honeycombfloor has several pieces of aluminum honeycomb panels to be spliced to form,
Be bolted Layering of floors in the profile mounting base of vehicle body bottom frame upper surface two sides, Layering of floors towards aluminum honeycomb
The a side on floor is pressed in the top of aluminum honeycombfloor, and another side of Layering of floors extends and is plugged on to side wall plate benging
In the slot that connection strap lower side end face opens up, the slot that connection strap upper side edge end face opens up is used for the grafting of side wall panel lower edge,
The one side of the connection strap towards stringer opens up several fixed holes, and the head of bolt passes through fixed hole and is threadedly coupled
One end of support shaft in side, is provided with several springs between the end of side support shaft and the inner sidewall of connection strap, spring pocket exists
On corresponding bolt, and the other end end coaxial welding of side support shaft has screw rod, and it is corresponding that screw flight is connected in side rail inner face
In the threaded hole opened up.
As further scheme of the invention: being covered with floor cloth above the aluminum honeycombfloor, and when aluminum honeycomb
When covering floor cloth on plate, a side towards aluminum honeycombfloor of Layering of floors is pressed on the top of floor cloth.
As a further solution of the present invention: the socket depth of the connection strap two sides is 5-8cm.
As a further solution of the present invention: one end of the upside support shaft offers stepped hole, wherein in stepped hole
The stomidium tapping processing of small size pores is for connecting bolt, and stepped hole large pore hole is used to accommodate one of fixed spring
Point.
As a further solution of the present invention: the rubber pad opens up several vertical and horizontal rows towards aluminum honeycombfloor on one side
Column sucker structure enables aluminum honeycombfloor to be attached closely by top-down pressure.
As a further solution of the present invention: the lower surface of the aluminum honeycombfloor is formed with several vertically and horizontally arranged circles
Shape smooth surface area, by opening up the groove connection of transverse and longitudinal between several round smooth surface areas, the purpose is to facilitate sucker structure to arrange
Gas, the two sides forming of the aluminum honeycomb panel in the aluminum honeycombfloor have an engaging lug for being connected to each other, and adjacent two
Engaging lug between a aluminum honeycomb panel is bolted to connection.
As a further solution of the present invention: the cold-proof materials bed of material mainly has cold-proof materials bed of material ontology, waterproof layer, bottom
Plate, connecting pin and screw are constituted, and the upper surface of bottom plate is successively compounded with cold-proof materials bed of material ontology and waterproof layer, and screw is from cold-proof materials
The upper surface self tapping of bed of material ontology and descend and be threaded in the threaded hole opened up in advance on bottom plate, bottom plate is stainless steel materials.
As a further solution of the present invention: during installation, first by the edge pair of side wall panel and Layering of floors
Standard is inserted into the groove of connection strap two sides, then bolt on connection strap is adjusted by rotation, so that connection strap internal pressure side wall panel
With receipts in the edge of Layering of floors to it, the method for bracing wire can be passed through before rotating internal pressure, vertical adjustment reference line is provided.
Compared with prior art, the beneficial effects of the present invention are:
The present invention increases rubber gasket structure, for enhancing damping effect, plays the work of noise reduction above convenient for passenger's walking
With the noise that reduction walking generates.
The present invention can to receive in connection strap flat so as to adjust it after the completion of whole assembling fittings by adjusting bolt
Whole degree, the structure can be made when needing to dismantle by certain elasticity between connection strap, side wall panel and Layering of floors
Connection strap can conveniently be taken out, and the efficiency of disassembly is improved.
The application can also reduce the requirement on machining accuracy to Layering of floors fixation hole on vehicle body bottom frame, mainly entire vehicle
The size of body chassis is too big, and the size of fixation hole is relatively much smaller, is easy to produce the error of larger size, is easy so that floor
Press strip out-of-flatness, the application is by adjustable connection strap, so that overall leveling aesthetic measure has obtained effective guarantee.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the guest room chassis interior structure for the city rail vehicle being readily disassembled.
Fig. 2 is the enlarged structure schematic diagram in Fig. 1 at A.
Fig. 3 is the structural representation of aluminum honeycombfloor lower surface in the guest room chassis interior structure for the city rail vehicle being readily disassembled
Figure.
Fig. 4 is the structural schematic diagram of rubber pad upper surface in the guest room chassis interior structure for the city rail vehicle being readily disassembled.
Fig. 5 is the structural schematic diagram of the cold-proof materials bed of material in the guest room chassis interior structure for the city rail vehicle being readily disassembled.
In figure: side support shaft 1, side wall panel 2, connection strap 3, Layering of floors 4, floor cloth 5, aluminum honeycombfloor 6, rubber pad 7,
The cold-proof materials bed of material 8, profile mounting base 9, vehicle body bottom frame 10, binding domain 11, groove 12, engaging lug 13, sucker structure 14, bolt
15, location hole of the spring 16, spring 17, cold-proof materials bed of material ontology 18, waterproof layer 19, bottom plate 20, connecting pin 21, screw 22.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~5, in the embodiment of the present invention, a kind of guest room chassis interior structure for the city rail vehicle being readily disassembled,
Including side support shaft 1, side wall panel 2, connection strap 3, Layering of floors 4, floor cloth 5, aluminum honeycombfloor 6, rubber pad 7, coldproof material
Layer 8, profile mounting base 9, vehicle body bottom frame 10, binding domain 11, groove 12, engaging lug 13, sucker structure 14, bolt 15, spring
Location hole 16 and spring 17, what the vehicle body bottom frame 10 was mainly welded by several crossbeams of the guest room bottom of vehicle and its both ends
Stringer is constituted, and multiple profile mounting bases 9 parallel with stringer is welded on several crossbeams, to facilitate consolidating for other inside components
Dingan County's dress provides basic mounting structure for firm interior structure.
It is equipped with coldproof material layer 8 on crossbeam between the profile mounting base 9, is located at vehicle passenger cab bottom for avoiding
Cold air and guest room inside quickly heat exchange, facilitate the energy conservation of objective indoor air-conditioning system；The upper surface of the cold-proof materials bed of material 8
It is equipped with rubber pad 7, the purpose of rubber pad 7 is to play the work of noise reduction above convenient for passenger's walking for enhancing damping effect
With reducing the noise that walking generates, be covered with aluminum honeycombfloor 6 above rubber pad 7, aluminum honeycombfloor 6 has several pieces of aluminum honeycombs
Plate is spliced to form, and effect is to reinforce walking surface, and floor cloth 5 is covered with above aluminum honeycombfloor 6, can by floor cloth 5
Play the function inside beautification guest room.
Layering of floors 4, Layering of floors is bolted in the profile mounting base 9 of the 10 upper surface two sides of vehicle body bottom frame
4 a side towards aluminum honeycombfloor 6 is pressed in the top (top that can also be pressed on floor cloth 5) of aluminum honeycombfloor 6, from
And aluminum honeycombfloor 6 is compressed, and another side of Layering of floors 4 is bent to side wall panel 2 and extends and be plugged on 3 lower side of connection strap
In the slot that end face opens up, the slot that 3 upper side edge end face of connection strap opens up is used for 2 lower edge grafting of side wall panel, thus connection strap 3
Realize that, to the hiding and fixed of 2 lower edge of 4 edge of Layering of floors and side wall panel, the socket depth of 3 two sides of connection strap is 5-8cm,
So that its is not easily to fall off.
The one side of connection strap 3 towards the stringer opens up several fixed holes, and the head of bolt 15 passes through fixed logical
Hole and the one end for being threaded in side support shaft 1 are provided with several between the end of side support shaft 1 and the inner sidewall of connection strap 3
A spring 17,17 sets of spring on corresponding bolt 15, by the connected narrow bars 3 of rotation tools for bolts ' pretension, that is, rotate the bullet that bolt is
Connection strap 3 is pressed on the end cap end face of bolt 15 by the reaction force of spring, and the other end end coaxial welding of side support shaft 1 has
Screw rod, screw flight are connected in the corresponding threaded hole opened up in side rail inner face, this structure can be after the completion of whole assembling fittings
To receive in connection strap 3 so as to adjust its flatness by adjusting bolt 15, which can pass through when needing to dismantle
Certain elasticity between connection strap 3, side wall panel 2 and Layering of floors 4 enables connection strap conveniently to take out, and improves the effect of disassembly
Rate, while during assembling bolt can also be then utilized first with elasticity by connection strap 3 and side wall panel 2 and Layering of floors 4
15 realization positions adjustings and side wall panel 2 and the interior receipts of Layering of floors 4 are fixed, and the application can also be reduced on vehicle body bottom frame 10
The size of the requirement on machining accuracy of 4 fixation hole of Layering of floors, mainly entire vehicle body bottom frame 10 is too big, and the size phase of fixation hole
To much smaller, it is easy to produce the error of larger size, is easy so that 4 out-of-flatness of Layering of floors.
Such as Fig. 2, it is preferred that one end of side support shaft 1 offers stepped hole, wherein a stomidium of stepped hole small pore
Tapping processing is for connecting bolt 15, and stepped hole large pore hole is used to accommodate a part of fixed spring 17, to avoid
Spring slide, it is ensured that elastic deformation is stablized.
Such as Fig. 4, the rubber pad 7 opens up several vertically and horizontally arranged sucker structures 14 towards aluminum honeycombfloor 6 on one side, leads to
Crossing top-down pressure enables aluminum honeycombfloor 6 to be attached closely, while the structure also tieed up aspect below by disassembly
Shield.
Such as Fig. 3, the lower surface of the aluminum honeycombfloor 6 is formed with several vertically and horizontally arranged round smooth surface areas 11, several
By opening up 12 connection of groove of transverse and longitudinal between a circle smooth surface area 11, the purpose is to facilitate sucker structure to be vented, avoid big
The gas of amount is concentrated situations such as causing bulge therebetween, the two sides forming of the aluminum honeycomb panel in the aluminum honeycombfloor 6
It is machined with the engaging lug 13 for being connected to each other, 13 company of being bolted of engaging lug between two adjacent aluminum honeycomb panels
It connects.
Such as Fig. 5, the cold-proof materials bed of material 8 mainly has cold-proof materials bed of material ontology 18, waterproof layer 19, bottom plate 20, connecting pin 21
It is constituted with screw 22, the upper surface of bottom plate 20 is successively compounded with cold-proof materials bed of material ontology 18 and waterproof layer 19, and screw 22 is from cold-proof
The upper surface self tapping of material layer ontology 18 and descend and be threadedly coupled the threaded hole opened up in advance on the base plate 20, bottom plate 20 be stainless steel
Plate, so that the firmness degree of bottom is improved, because the more loose softness of the cold-proof materials bed of material 8, is surprisingly damaged so can be avoided
It is bad.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (8)
1. a kind of guest room chassis interior structure of city rail vehicle being readily disassembled, including side support shaft (1), connection strap (3), floor
Press strip (4), floor cloth (5), aluminum honeycombfloor (6), rubber pad (7), the cold-proof materials bed of material (8), profile mounting base (9) and car body bottom
Frame (10), which is characterized in that the vehicle body bottom frame (10) is mainly welded by several crossbeams of the guest room bottom of vehicle and its both ends
The stringer connect is constituted, and welds multiple profile mounting bases (9) parallel with stringer, the profile mounting base (9) on several crossbeams
Between crossbeam on be equipped with coldproof material layer (8), the upper surface of the cold-proof materials bed of material (8) is equipped with rubber pad (7), rubber pad
(7) top is covered with aluminum honeycombfloor (6), and aluminum honeycombfloor (6) has several pieces of aluminum honeycomb panels to be spliced to form, the vehicle body bottom frame
(10) be bolted Layering of floors (4) in the profile mounting base (9) of upper surface two sides, Layering of floors (4) towards aluminium bee
The a side on nest floor (6) is pressed in the top of aluminum honeycombfloor (6), and another side of Layering of floors (4) is curved to side wall panel (2)
Qu Yanshen is simultaneously plugged in the slot that connection strap (3) lower side end face opens up, and the slot that connection strap (3) upper side edge end face opens up is used
Several fixed holes, bolt are opened up in the one side of side wall panel (2) lower edge grafting, connection strap (3) towards the stringer
(15) head passes through fixed hole and is threaded in one end of side support shaft (1), the end of side support shaft (1) and connection strap
(3) several springs (17) are provided between inner sidewall, spring (17) covers on corresponding bolt (15), and side support shaft
(1) other end end coaxial welding has screw rod, and screw flight is connected in the corresponding threaded hole opened up in side rail inner face.
2. the guest room chassis interior structure of the city rail vehicle according to claim 1 being readily disassembled, which is characterized in that described
It is covered with floor cloth (5) above aluminum honeycombfloor (6), and when covering floor cloth (5) on aluminum honeycombfloor (6), floor
A side towards aluminum honeycombfloor (6) of press strip (4) is pressed on the top of floor cloth (5).
3. the guest room chassis interior structure of the city rail vehicle according to claim 1 being readily disassembled, which is characterized in that described
The socket depth of connection strap (3) two sides is 5-8cm.
4. the guest room chassis interior structure of the city rail vehicle according to claim 1 being readily disassembled, which is characterized in that described
One end of upside support shaft (1) offers stepped hole, and wherein a stomidium tapping of stepped hole small pore is processed for connecting
Bolt (15), and stepped hole large pore hole is used to accommodate a part of fixed spring (17).
5. the guest room chassis interior structure of the city rail vehicle according to claim 1 being readily disassembled, which is characterized in that described
Rubber pad (7) opens up several vertically and horizontally arranged sucker structures (14) towards aluminum honeycombfloor (6) on one side, by top-down
Pressure be attached aluminum honeycombfloor (6) can closely.
6. the guest room chassis interior structure of the city rail vehicle according to claim 5 being readily disassembled, which is characterized in that described
The lower surface of aluminum honeycombfloor (6) is formed with several vertically and horizontally arranged round smooth surface areas (11), several round smooth surface areas
(11) by opening up groove (12) connection of transverse and longitudinal, the purpose is to facilitate sucker structure to be vented, the aluminum honeycombfloor between
(6) the two sides forming of the aluminum honeycomb panel in has the engaging lug (13) for being connected to each other, two adjacent aluminum honeycomb panels
Between engaging lug (13) be bolted to connection.
7. the guest room chassis interior structure of the city rail vehicle according to claim 1 being readily disassembled, which is characterized in that described
The cold-proof materials bed of material (8) mainly has cold-proof materials bed of material ontology (18), waterproof layer (19), bottom plate (20), connecting pin (21) and screw
(22) it constitutes, the upper surface of bottom plate (20) is successively compounded with cold-proof materials bed of material ontology (18) and waterproof layer (19), and screw (22) is certainly
The upper surface self tapping of cold-proof materials bed of material ontology (18) and descend and be threaded in the threaded hole opened up in advance on bottom plate (20), bottom plate
It (20) is stainless steel materials.
8. the guest room chassis interior structure of -7 any city rail vehicles being readily disassembled, feature exist according to claim 1
In specific installation method are as follows: the edge of side wall panel and Layering of floors is aligned for insertion into first in the groove of connection strap two sides,
Then by rotation adjust connection strap on bolt so that at the edge of connection strap internal pressure side wall panel and Layering of floors in receipts to its,
Before rotating internal pressure vertical adjustment reference line can be provided by the method for bracing wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910397065.7A CN110077429B (en) | 2019-05-14 | 2019-05-14 | Easily-detachable passenger room underframe built-in structure of urban rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910397065.7A CN110077429B (en) | 2019-05-14 | 2019-05-14 | Easily-detachable passenger room underframe built-in structure of urban rail vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110077429A true CN110077429A (en) | 2019-08-02 |
| CN110077429B CN110077429B (en) | 2020-05-08 |
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ID=67420110
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910397065.7A Expired - Fee Related CN110077429B (en) | 2019-05-14 | 2019-05-14 | Easily-detachable passenger room underframe built-in structure of urban rail vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN110077429B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110626247A (en) * | 2019-11-12 | 2019-12-31 | 郑州红宇专用汽车有限责任公司 | Bottom plate structure of breast board type gas cylinder transport vehicle and installation method |
| CN112455480A (en) * | 2019-09-09 | 2021-03-09 | 速度创新公司 | Body for a vehicle and method of mounting the body |
| CN112917092A (en) * | 2019-12-05 | 2021-06-08 | 中车唐山机车车辆有限公司 | Machining method of carriage floor groove |
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| CN107947718A (en) * | 2017-12-20 | 2018-04-20 | 武汉博茗低碳产业股份有限公司 | A kind of photovoltaic harden structure for being easily installed and replacing |
| CN207633703U (en) * | 2017-12-12 | 2018-07-20 | 深圳市朗生建材有限公司 | A kind of skirting |
| CN208122190U (en) * | 2018-04-27 | 2018-11-20 | 江苏创森新材料有限公司 | A kind of auxiliary floor laying structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0031306A2 (en) * | 1979-12-20 | 1981-07-01 | Schweizerische Aluminium AG | Frame-built superstructure for road or railway vehicles |
| DE19927003A1 (en) * | 1999-06-09 | 2000-12-21 | Daimler Chrysler Ag | Connection for floor covering in vehicles, especially rail vehicles |
| CN201613897U (en) * | 2009-12-24 | 2010-10-27 | 南车南京浦镇车辆有限公司 | Side wall panel structure of metro vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112455480A (en) * | 2019-09-09 | 2021-03-09 | 速度创新公司 | Body for a vehicle and method of mounting the body |
| CN110626247A (en) * | 2019-11-12 | 2019-12-31 | 郑州红宇专用汽车有限责任公司 | Bottom plate structure of breast board type gas cylinder transport vehicle and installation method |
| CN112917092A (en) * | 2019-12-05 | 2021-06-08 | 中车唐山机车车辆有限公司 | Machining method of carriage floor groove |
| CN112917092B (en) * | 2019-12-05 | 2022-03-01 | 中车唐山机车车辆有限公司 | Machining method of carriage floor groove |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110077429B (en) | 2020-05-08 |
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