CN109435997A - The collapsible railway freight-car removable top cover of big aperture - Google Patents
The collapsible railway freight-car removable top cover of big aperture Download PDFInfo
- Publication number
- CN109435997A CN109435997A CN201811245613.6A CN201811245613A CN109435997A CN 109435997 A CN109435997 A CN 109435997A CN 201811245613 A CN201811245613 A CN 201811245613A CN 109435997 A CN109435997 A CN 109435997A
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- top plate
- railway freight
- top cover
- car
- wirerope
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052742 iron Inorganic materials 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D39/00—Wagon or like covers; Tarpaulins; Movable or foldable roofs
- B61D39/002—Sliding or folding roofs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D39/00—Wagon or like covers; Tarpaulins; Movable or foldable roofs
- B61D39/006—Opening and closing means
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The present invention provides a kind of big collapsible railway freight-car removable top covers of aperture, which includes: track base, and it includes multiple guide rails that two sides, each track base, which is arranged at the top of lorry, in the track base；Multiple top plates, the two sides of each top plate are slidably installed in corresponding guide rail, and top plate both ends are provided with buting iron；Driving section, the driving section includes lifting pulley, wirerope and driving device, one end of the lifting pulley is connected to the track base, in railway freight-car end, the wirerope-winding forms closure winding on the lifting pulley and the output shaft of the driving device for the driving device setting, block is provided on the wirerope, the driving device drives the wirerope rotation, and the block can be in contact with buting iron, and multiple top plates is driven to fold or be unfolded.The big collapsible railway freight-car removable top cover aperture of aperture is big, opening and closing occupies little space, while rigidity is strong.
Description
Technical field
The invention belongs to train fields, more particularly, to a kind of big collapsible railway freight-car removable top cover of aperture.
Background technique
The existing most aperture of railway freight-car removable top cover is smaller, to the more demanding of loading facility, does not adapt to big width
Charging door reduces the loading efficiency of vehicle.And the biggish removable top cover of existing some apertures exists during opening and closing and
The problem of occupied space is big after top cover is opened, intrusion vehicle or even track clearance, limits the place to use of vehicle, simultaneously because
Top cover span is big, and middle part, which lacks support, causes top cover weight big, poor rigidity.
Therefore, it is necessary to develop a kind of apertures, and big, opening and closing occupies little space, while the collapsible railway of big aperture that rigidity is strong
Lorry removable top cover.
The information for being disclosed in background of invention part is merely intended to deepen the reason to general background technique of the invention
Solution, and it is known to those skilled in the art existing to be not construed as recognizing or imply that the information is constituted in any form
Technology.
Summary of the invention
The object of the present invention is to provide a kind of big collapsible railway freight-car removable top cover of aperture, the big collapsible railways of aperture
Lorry removable top cover aperture is big, opening and closing occupies little space, while rigidity is strong.
To achieve the goals above, the present invention provides a kind of collapsible railway freight-car removable top cover of big aperture, the big aperture
Collapsible railway freight-car removable top cover includes:
Track base, it includes multiple guide rails that two sides, each track base, which is arranged at the top of lorry, in the track base；
Multiple top plates, the two sides of each top plate are slidably installed in corresponding guide rail, and top plate both ends are provided with buting iron；
Driving section, the driving section include lifting pulley, wirerope and driving device, one end connection of the lifting pulley
In the track base, the driving device is arranged in railway freight-car end, and the wirerope-winding is in the lifting pulley and institute
It states on the output shaft of driving device, forms closure winding, block is provided on the wirerope, described in the driving device drives
Wirerope rotation, the block can be in contact with buting iron, and multiple top plates is driven to fold or be unfolded.
Preferably, the top plate two sides are provided with hanging pulley, and the top plate is slidably installed in two by the hanging pulley
In the guide rail.
Preferably, the multiple top plate is divided into two groups, and the driving section is two, and two driving sections are separately positioned on
Lorry tank ends, two driving sections respectively drive two groups described in top plate to lorry tank ends open.
Preferably, each top plate close to top cover closed end side is provided with vertical beam, Mei Geding in every group of top plate
The other side of plate be located in the vertical beam of adjacent top plate, and the buting iron is arranged far from the top plate both ends of the top cover closure.
It preferably, further include connecting cross beam, the connecting cross beam connects two track bases, is located at the railway freight-car
One or both ends.
Preferably, lifting pulley includes top pulleys and end pulley；The top pulleys be it is multiple, pass sequentially through connection
Plate is connected to the guide rail, is lifted at the top of the multiple top plate；The end pulley is connected to the connection by fixed plate
Crossbeam.
It preferably, further include retarder, the output shaft of the driving device is connected to the input shaft of the retarder, described
Wirerope-winding forms closure winding on the output shaft of the lifting pulley and the retarder.
It preferably, further include transmission handwheel disk, one end of the transmission handwheel disk is connected to the output shaft of the retarder.
Preferably, the buting iron being arranged far from the top plate of railway freight-car end is two, is arranged on the wirerope
Block be located between two buting iron.
Preferably, the block being arranged on the wirerope is two, and the top plate for being arranged far from railway freight-car end is
Between two blocks.
The beneficial effects of the present invention are:
1) it by the setting of multiple top plates, carrying out opening and being closed top cover using collapsible, aperture is big, occupies little space,
Rigid is high simultaneously.
2) multiple top plates are pulled to slide in track base by driving device and wirerope by driving section and track base, it is real
The unlatching and closure of existing top cover, operation is more simple, easy to use.
Other features and advantages of the present invention will then part of the detailed description can be specified.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
The top cover that Fig. 1 shows the collapsible railway freight-car removable top cover of big aperture according to an embodiment of the invention closes
Closed state schematic diagram.
Fig. 2 shows the top covers of the big collapsible railway freight-car removable top cover of aperture according to an embodiment of the invention to open
Open status diagram.
Fig. 3 shows the schematic of the collapsible railway freight-car removable top cover of big aperture according to an embodiment of the invention
Structure chart.
It puts the part that Fig. 4 shows the collapsible railway freight-car removable top cover of big aperture according to an embodiment of the invention
Big schematic diagram.
Fig. 5 a-5b is shown on the inside of top plate according to an embodiment of the invention and outside schematic diagram.
Fig. 6 shows top plate according to an embodiment of the invention and track base connection schematic diagram.
Fig. 7 shows the diagrammatic cross-section of multiple top plates according to an embodiment of the invention.
Fig. 8 shows the top view of multiple top plates according to an embodiment of the invention.
Fig. 9 shows top plate buting iron according to an embodiment of the invention and wirerope block schematic diagram.
Description of symbols:
1, top plate 1；2, top plate 2；3, top plate 3；4, top plate 4；5, guide rail；6, track base；7, top pulleys；8, end is sliding
Wheel；9, wirerope；10, air motor；11, retarder；12, handwheel disk；13, top plate；14, truck body；15, lorry cabinet；
16, top cover closed end；17 car body top side rails；18, car body crossbeam；19 hanging pulleys；20, on the inside of top plate；21, on the outside of top plate；22,
Buting iron；23, vertical beam；24, block.
Specific embodiment
The preferred embodiment of the present invention is described in more detail below.Although the following describe preferred implementations of the invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by the embodiments set forth herein.Phase
Instead, these embodiments are provided so that the present invention is more thorough and complete, and can be by the scope of the present invention completely
It is communicated to those skilled in the art.
The present invention provides a kind of big collapsible railway freight-car removable top cover of aperture, the big collapsible railway freight-car of aperture is living
Dynamic top cover includes:
Track base, it includes multiple guide rails that two sides, each track base, which is arranged at the top of lorry, in the track base；
Multiple top plates, the two sides of each top plate are slidably installed in corresponding guide rail, and top plate both ends are provided with buting iron；
Driving section, the driving section include lifting pulley, wirerope and driving device, one end connection of the lifting pulley
In the track base, the driving device is arranged in railway freight-car end, and the wirerope-winding is in the lifting pulley and institute
It states on the output shaft of driving device, forms closure winding, block is provided on the wirerope, described in the driving device drives
Wirerope rotation, the block can be in contact with buting iron, and multiple top plates is driven to fold or be unfolded.
Specifically, track base setting two sides, multiple top plates at the top of lorry are slidedly arranged on guide rail respectively, are sequentially overlapped when use
Lorry top cover can be covered when setting expansion, top cover can be opened when folding by shrinking.
Specifically, driving motor can drive wirerope to rotate, and then drive multiple top plates in respective gliding in tracks, lead to
Overdrive the rotating forward of motor and reversion can control the folding and expansion of multiple top plates, so the unlatching of realization lorry top cover with close
It closes.Top cover aperture is substantially increased by way of folding and opening, while unlatching and closing and being not take up exceptional space, each top plate
It can act as supporting role, rigid is more preferably.
It is highly preferred that the both ends of the track base extend to outside the compartment both ends of the lorry, when top plate is opened to both ends
Qi Shi, the position that multiple top plates fold can be at both ends at the top of boxcar, can make to be fully deployed at the top of boxcar.
Preferably, the top plate two sides are provided with hanging pulley, and the top plate is set by hanging pulley cunning
In two guide rails.
Specifically, top plate is slidably installed in guide rail by hanging pulley, and frictional force is more lower when top plate is mobile, is drawn convenient for wirerope
Dynamic top plate.
Preferably, the multiple top plate is divided into two groups, and the driving section is two, two driving section difference
Be arranged in lorry tank ends, two driving sections respectively drive two groups described in top plate to lorry tank ends open.
Specifically, settable two sets of top plates and driving section at the top of each boxcar, open top cover to car body two sides respectively.
Intensity needed for railway carriage body length and every piece of top plate of receiving is limited, and two sets of top plates are arranged at the top of lorry opposite to shorten every piece of top plate
Length, improve the support strength of top cover.
Preferably, each top plate close to top cover closed end side is provided with vertical beam in every group of top plate,
The other side of each top plate be located in the vertical beam of adjacent top plate, and the buting iron is arranged far from the top plate of the top cover closure
Both ends.
Specifically, the side of each top plate is provided with vertical beam, and multiple top plates are overlapped mutually setting, pulls one end in wirerope
Top plate when, top plate is mobile to be in contact with other vertical beams and then all top plates can be driven to fold or be unfolded.
It preferably, further include connecting cross beam, the connecting cross beam connects two track bases, is located at the iron
The one or both ends of afloat vehicle.Keep the collapsible railway freight-car removable top cover structure of big aperture more steady by the setting cross bar of crossbeam
Gu.
Preferably, lifting pulley includes top pulleys and end pulley；The top pulleys be it is multiple, successively lead to
It crosses connecting plate and is connected to the guide rail, be lifted at the top of the multiple top plate；The end pulley is connected to institute by fixed plate
State connecting cross beam.
Specifically, lifting pulley plays the role of wirerope guiding, and wirerope-winding is in top pulleys and end pulley shape
At closure winding.
It preferably, further include retarder, the output shaft of the driving device is connected to the input of the retarder
Axis, the wirerope-winding form closure winding on the output shaft of the lifting pulley and the retarder.
It preferably, further include transmission handwheel disk, one end of the transmission handwheel disk is connected to the retarder
Output shaft.
Specifically, by being driven the setting of handwheel disk, transmission handwheel disk can also be rotated manually and drives wirerope rotation, expansion
Or the multiple top plates of closure.
Preferably, the buting iron being arranged far from the top plate of railway freight-car end is two, is arranged in the steel
Block in cord is located between two buting iron.
Specifically, in wirerope motion process, the block on wirerope can be in contact with buting iron, and then drive far from iron
The top plate of afloat vehicle end is mobile, and adjacent top can be driven by vertical beam in the top plate moving process far from railway freight-car end
Plate is mobile, and then realizes the folding and expansion of top plate, realizes the unlatching and closure of top cover.
Preferably, the block being arranged on the wirerope is two, is arranged far from railway freight-car end
Top plate is between two blocks.
Specifically, in wirerope motion process, the block on wirerope can be in contact with buting iron, and then drive far from iron
The top plate of afloat vehicle end is mobile, and adjacent top can be driven by vertical beam in the top plate moving process far from railway freight-car end
Plate is mobile, and then realizes the folding and expansion of top plate, realizes the unlatching and closure of top cover.
It is highly preferred that the top plate is 3-8, the roof of the railway freight-car can be covered.
It is highly preferred that the driving device is air motor, the body end of the railway freight-car is fixed on by being mounted on
Portion.
Embodiment
The top cover that Fig. 1 shows the collapsible railway freight-car removable top cover of big aperture according to an embodiment of the invention closes
Closed state schematic diagram.Fig. 2 shows the big collapsible railway freight-car removable top covers of aperture according to an embodiment of the invention
Top cover open state schematic diagram.Fig. 3 shows the collapsible railway freight-car activity of big aperture according to an embodiment of the invention
The schematic diagram of top cover.Fig. 4 shows the collapsible railway freight-car activity of big aperture according to an embodiment of the invention
The partial enlargement diagram of top cover.Fig. 5 a-5b is shown on the inside of top plate according to an embodiment of the invention and outside signal
Figure.Fig. 6 shows top plate according to an embodiment of the invention and track base connection schematic diagram.Fig. 7 is shown according to this hair
The diagrammatic cross-section of multiple top plates of bright one embodiment.Fig. 8 shows multiple tops according to an embodiment of the invention
The top view of plate.Fig. 9 shows top plate buting iron according to an embodiment of the invention and wirerope block schematic diagram.
The big collapsible railway freight-car removable top cover of aperture is a set of removable top cover opened along car body longitudinal center to two sides,
Two sets of identical big collapsible railway freight-car removable top covers of aperture have been laid at an end of vehicle and "A" end of car, and when closing can be complete
Vehicle roof can be completely exposed by complete hiding vehicle roof after unlatching.
As shown in figs. 1-9, which includes: multiple top plates, guide rail 5, guide rail
Seat 6, top pulleys 7, end pulley 8, wirerope 9, air motor 10, retarder 11 form.Wherein track base 6, end pulley 8
It is fixedly welded on the car body top side rail 17 at 14 top of car body.7, four guide rails 5 of top pulleys are fixedly installed in track base 6
On.Multiple top plates 13 are installed in corresponding guide rail 5 by the hanging pulley 19 installed on top cover.Air motor 10, retarder
11 are installed on floor underframe for vehicle, and 10 output shaft of air motor is connected on 11 input shaft of retarder.Wirerope twines 9 around each pulley
Group and retarder export runner, form a trap and close winding.
When entirely roof system is in the closed position, multiple top plates are successively symmetrically unfolded along car body longitudinal center, by vehicle
Top is completely obscured.It drives retarder 11 to export runner when air motor 10 rotates clockwise to rotate clockwise, pulls winding
Wirerope 9 on runner and pulley moves, and the block 24 on vehicle roof wirerope 9 is transported from vehicle middle part to end at this time
It is dynamic, after contacting with the buting iron 22 installed on top plate 1, top plate 1 is driven to translate to vehicle end, when top plate 1 moves to its inside
2 inside of vertical beam 23 and top plate vertical beam 23 contact after drive top plate 2 also to start to vehicle end translation；It is moved in top plate 2
After vertical beam 23 on the inside of it contacts the vertical beam 23 of 3 inside of top plate, top plate 3 is driven also to start to translate to vehicle end；It is transported in top plate 3
After moving to the vertical beam 23 on the inside of it vertical beam 23 for contacting 4 inside of top plate, top plate 4 is driven also to start to be closed to the top cover of vehicle end
16 translation of end.It is fully opened when top plate 4 moves to top cover after its outside vertical beam contact car body crossbeam 18 limits, exposes vehicle upper
Lorry cabinet 15.Specifically, the setting of vertical beam 23 20 on the inside of the top plate at, 21 be tabular on the outside of top plate.
It drives retarder 11 to export runner when air motor 10 rotates counterclockwise to rotate counterclockwise, pulling is wrapped in runner
And wirerope 9 on pulley moves, the block 24 on vehicle roof wirerope 9 is moved from vehicle end to middle part at this time, with
After the buting iron 22 installed on top plate 1 contacts, drive top plate 1 to translation in the middle part of vehicle, when top plate 1 moves to the vertical beam 23 on the outside of it
Top plate 2 is driven also to start to translate in the middle part of vehicle after contacting with the vertical beam 23 of 2 inside of top plate；It is moved on the outside of it in top plate 2
After vertical beam 23 contacts the vertical beam 23 of 3 inside of top plate, top plate 3 is driven also to start to translate in the middle part of vehicle；It is moved to outside it in top plate 3
After the vertical beam 23 of side contacts the vertical beam 23 of 4 inside of top plate, top plate 4 is driven also to start to translate in the middle part of vehicle.When top plate 4 moves to
Vertical beam 23 on the outside of it contacts top cover after car body crossbeam 18 limits and completely closes, and covers entire vehicle upper.
The set roof system air motor 10 can be used to be used as power, it is possible to use the transmission handwheel disk on retarder 11
12 are opened and closed top cover in calm or pneumatic failure to realize.During entire opening and closing, top plate is under the drawing of wirerope 9
Translational motion only is done along guide rail 5, all moving links are without departing from car body profile.Top cover since span is smaller, so it is light-weight,
Rigidity is big, and the rolling frictional resistance that hanging pulley generates during exercise is smaller, and required dynamical element power is also smaller.
The big collapsible railway freight-car removable top cover of aperture has following technical effect that
1, single top plate span is smaller, so higher rigidity can be achieved in the case where self weight is relatively light, solves existing
The problem that the elongated top cover rigidity of railway freight-car is poor or self weight is larger.
2, the rolling frictional resistance that the top cover only needs to overcome during opening and closing hanging pulley to generate, simultaneously because self weight compared with
Gently, rolling frictional resistance is smaller, therefore required dynamical element power is smaller.
3, the top cover realizes big aperture function by collapsible opening and closing, solves existing railway freight-car removable top cover and opens
Universal lesser problem is spent, existing big width charging door is suitable for.
4, during the top cover is entirely opened and closed, translational motion, all movement structures only are done along guide rail under the drawing of wirerope
Part solves the problems, such as that the big aperture canopy switch process of existing railway lorry transfinites without departing from car body profile.
5, pneumatic or manual two kinds of opening and closing modes can be used in the top cover.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (10)
1. a kind of collapsible railway freight-car removable top cover of big aperture, which is characterized in that the big collapsible railway freight-car activity of aperture
Top cover includes:
Track base, it includes multiple guide rails that two sides, each track base, which is arranged at the top of lorry, in the track base；
Multiple top plates, the two sides of each top plate are slidably installed in corresponding guide rail, and top plate both ends are provided with buting iron；
Driving section, the driving section include lifting pulley, wirerope and driving device, and one end of the lifting pulley is connected to institute
Track base is stated, the driving device is arranged in railway freight-car end, and the wirerope-winding is in the lifting pulley and the drive
On the output shaft of dynamic device, closure winding is formed, block is provided on the wirerope, the driving device drives the steel wire
Rope rotation, the block can be in contact with buting iron, and multiple top plates is driven to fold or be unfolded.
2. the collapsible railway freight-car removable top cover of big aperture according to claim 1, which is characterized in that the top plate two sides
It is provided with hanging pulley, the top plate is slidably installed in two guide rails by the hanging pulley.
3. the collapsible railway freight-car removable top cover of big aperture according to claim 1, which is characterized in that the multiple top plate
It is divided into two groups, the driving section is two, and two driving sections are separately positioned on lorry tank ends, two driving section difference
Top plate described in driving two groups is opened to lorry tank ends.
4. the collapsible railway freight-car removable top cover of big aperture according to claim 3, which is characterized in that every in every group of top plate
A top plate is provided with vertical beam close to top cover closed end side, and the other side of each top plate be located in the vertical of adjacent top plate
Liang Shang, the buting iron are arranged far from the top plate both ends of the top cover closure.
5. the collapsible railway freight-car removable top cover of big aperture according to claim 1, which is characterized in that further include that connection is horizontal
Beam, the connecting cross beam connects two track bases, positioned at the one or both ends of the railway freight-car.
6. the collapsible railway freight-car removable top cover of big aperture according to claim 5, which is characterized in that lifting pulley includes
Top pulleys and end pulley；The top pulleys be it is multiple, pass sequentially through connecting plate and be connected to the guide rail, be lifted on described
At the top of multiple top plates；The end pulley is connected to the connecting cross beam by fixed plate.
7. the collapsible railway freight-car removable top cover of big aperture according to claim 1, which is characterized in that further include slowing down
Device, the output shaft of the driving device are connected to the input shaft of the retarder, and the wirerope-winding is in the lifting pulley
And on the output shaft of the retarder, closure winding is formed.
8. the collapsible railway freight-car removable top cover of big aperture according to claim 7, which is characterized in that further include transmission hand
One end of wheel disc, the transmission handwheel disk is connected to the output shaft of the retarder.
9. the collapsible railway freight-car removable top cover of big aperture according to claim 1, which is characterized in that be arranged far from iron
Buting iron on the top plate of afloat vehicle end is two, and the block on the wirerope is arranged between two buting iron.
10. the collapsible railway freight-car removable top cover of big aperture according to claim 1, which is characterized in that be arranged described
Block on wirerope is two, and the top plate for being arranged far from railway freight-car end is between two blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245613.6A CN109435997A (en) | 2018-10-24 | 2018-10-24 | The collapsible railway freight-car removable top cover of big aperture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245613.6A CN109435997A (en) | 2018-10-24 | 2018-10-24 | The collapsible railway freight-car removable top cover of big aperture |
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| CN109435997A true CN109435997A (en) | 2019-03-08 |
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|---|---|---|---|
| CN201811245613.6A Pending CN109435997A (en) | 2018-10-24 | 2018-10-24 | The collapsible railway freight-car removable top cover of big aperture |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110203230A (en) * | 2019-06-25 | 2019-09-06 | 神华铁路货车运输有限责任公司 | Cap structure and railway freight-car with the cap structure |
| CN110203234A (en) * | 2019-06-25 | 2019-09-06 | 神华铁路货车运输有限责任公司 | Cover device and railway freight-car |
| CN110239578A (en) * | 2019-06-25 | 2019-09-17 | 神华铁路货车运输有限责任公司 | Cap structure and railway freight-car with the cap structure |
| CN110667625A (en) * | 2019-10-08 | 2020-01-10 | 中车太原机车车辆有限公司 | Manual opening and closing device for top cover of railway wagon and railway wagon |
| CN113844480A (en) * | 2021-09-22 | 2021-12-28 | 内蒙古大唐国际托克托发电有限责任公司 | Touching formula railway freight car top cap controlling means |
| CN114572259A (en) * | 2022-03-24 | 2022-06-03 | 常州市新创智能科技有限公司 | Car roof sliding plug door structure and rail transit car body |
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