CN107226100A - A kind of device and railway hopper car of control bottom door opening and closing - Google Patents
A kind of device and railway hopper car of control bottom door opening and closing Download PDFInfo
- Publication number
- CN107226100A CN107226100A CN201710447538.0A CN201710447538A CN107226100A CN 107226100 A CN107226100 A CN 107226100A CN 201710447538 A CN201710447538 A CN 201710447538A CN 107226100 A CN107226100 A CN 107226100A
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- China
- Prior art keywords
- bottom door
- tilting member
- limiting component
- pedestal
- door
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D7/00—Hopper cars
- B61D7/14—Adaptations of hopper elements to railways
- B61D7/16—Closure elements for discharge openings
- B61D7/24—Opening or closing means
- B61D7/28—Opening or closing means hydraulic or pneumatic
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention provides a kind of device and railway hopper car of control bottom door opening and closing, described device includes：Pedestal, the pedestal is fixed on the car body side of hopper wagon；First limiting component, first limiting component is arranged on one end of the pedestal, and first limiting component is used for the rotation for limiting tilting member；Tilting member, the tilting member is connected by rotatable parts with the pedestal, and the tilting member is rotated using self gravitation around the rotatable parts positive direction；Pushing mechanism, the pushing mechanism is arranged on the first bottom door, and the pushing mechanism is used to promote the tilting member opposite direction to rotate；Second limiting component, second limiting component is arranged on the second bottom door, and second limiting component is used for the rotation for limiting second bottom door；Linkage, the linkage is connected with first bottom door and second bottom door respectively；Driving part, the driving part is connected with the linkage.
Description
Technical field
The invention belongs to railway freight-car technical field, more particularly to a kind of device and railroad hopper of control bottom door opening and closing
Car.
Background technology
The railway hopper car for transporting loose goods is unloaded by the way of bottom is opened the door, and is had in hopper wagon freight
The tiny type of merchandize of particle, therefore bottom door structure must take seal approach to prevent cargo leakage.For fanning bottom door knot using two
The hopper wagon of configuration formula, one of which sealing means are overlapping above and below the overhanging scrap (bridge) of bottom door panel design of two fan bottom doors, two scrap (bridge)s
Contact is sealed.Due to overlying contact above and below the door-plate scrap (bridge) of two fan bottom doors, the opening and closing of two fan bottom doors are it requires
With defined order, otherwise occur that bottom door closes not in place, bad, jam the phenomenon of the failure of unlatching.
Prior art, when controlling the opening and closing of bottom door, is to need by two reservoirs, while needing fitting delay valve etc. suitable
Sequence control element is controlled come the opening and closing to bottom door, but such words installation pipeline also accordingly increases, whole system operation
Control, complicated, manufacture and maintenance cost height.
Based on this, the present invention provides a kind of device and railway hopper car of control bottom door opening and closing, for solving prior art
In above mentioned problem.
The content of the invention
The problem of existing for prior art, the embodiments of the invention provide a kind of device and railway of control bottom door opening and closing
Hopper wagon, during for solving that control is opened and closed to the bottom door of railway hopper car in the prior art, Control system architecture is complicated, leads
Cause production cost and the increased technical problem of maintenance cost.
The present invention provides a kind of device of control bottom door opening and closing, and described device includes：
Pedestal, the pedestal is fixed on the car body side of hopper wagon；
First limiting component, first limiting component is arranged on one end of the pedestal, and first limiting component is used
In the rotation of limitation tilting member；
Tilting member, the tilting member is connected by rotatable parts with the pedestal, and the tilting member utilizes itself
Gravity is rotated around the rotatable parts positive direction；
Pushing mechanism, the pushing mechanism is arranged on the first bottom door, and the pushing mechanism is used to promote the swing part
Part opposite direction is rotated；
Second limiting component, second limiting component is arranged on the second bottom door, and second limiting component is used to limit
Make the rotation of second bottom door；
Linkage, the linkage is connected with first bottom door and second bottom door respectively；
Driving part, the driving part is connected with the linkage.
In such scheme, when the tilting member free-falling is static, first limiting component and the swing part
There is an angle with vertical line in the line between part rest point.
In such scheme, the tilting member is connected by rotatable parts with the pedestal, including：
The rotatable parts are fixed on the pedestal, and the tilting member is connected by being hinged with the rotatable parts.
In such scheme, when first bottom door is closed mode with second bottom door, the pushing mechanism and institute
Tilting member contact is stated, there is space between the tilting member and second limiting component.
In such scheme, the pedestal includes：Axis pin base.
In such scheme, pushing mechanism includes：Push away iron.
In such scheme, rotatable parts include：Rotating shaft.
In such scheme, the tilting member includes：Centering block.
In such scheme, second limiting component includes：Block.
The present invention also provides a kind of railway hopper car, and the hopper wagon includes any described control bottom door opening and closing as described above
Device.
The invention provides a kind of device and railway hopper car of control bottom door opening and closing, described device includes：Pedestal, it is described
Pedestal is fixed on the car body side of hopper wagon；First limiting component, first limiting component is arranged on one end of the pedestal,
First limiting component is used for the rotation for limiting tilting member；Tilting member, the tilting member passes through rotatable parts and institute
State pedestal to be connected, the tilting member is rotated using self gravitation around the rotatable parts positive direction；Pushing mechanism, the promotion
Part is arranged on the first bottom door, and the pushing mechanism is used to promote the tilting member opposite direction to rotate；Second limiting component,
Second limiting component is arranged on the second bottom door, and second limiting component is used for the rotation for limiting second bottom door；
Linkage, the linkage is connected with first bottom door and second bottom door respectively；Driving part, the drive division
Part is connected with the linkage；In this way, when hopper wagon bottom door needs to close in opening, driving part driving second
Bottom door is rotated and closed the door, and is closed the door while linkage drives the first bottom door to rotate, when the second limiting component connects with the tilting member
When touching, the tilting member may be prevented from the second bottom door and be rotated further, and the first bottom door then may proceed to rotate, therefore the first bottom door
Perform the action closed the door, when the pushing mechanism on the first bottom door is contacted with tilting member, will can push open prior to the second bottom door
Tilting member, thus can cause the second bottom door to continue executing with action of closing the door, it is ensured that the first bottom door first closes closing the door in place
Sequentially；And when hopper wagon bottom door is closed needing to open, driving part drives the second bottom door to rotate and opened the door, connect simultaneously
Linkage drives the first bottom door to rotate and opened the door, it is ensured that the second bottom door first reaches the enabling order of position；So, using only need utilize
One driving part is that opening and closing can be achieved, the control piper complicated without arrangement, simplifies the overall structure of control system, reduces
Production cost and maintenance cost.
Brief description of the drawings
Fig. 1 is the overall structure diagram of device when the bottom door that the embodiment of the present invention one is provided is closed mode；
Fig. 2 is the overall structure diagram of device when the bottom door that the embodiment of the present invention one is provided is opening；
Fig. 3 be the embodiment of the present invention one supply bottom door from off state to opening when device overall structure signal
Figure.
Embodiment
During in order to for solving that control is opened and closed to the bottom door of railway hopper car in the prior art, Control system architecture is multiple
It is miscellaneous, cause production cost and the increased technical problem of maintenance cost, the invention provides it is a kind of control bottom door opening and closing device and
Railway hopper car, described device includes：Pedestal, the pedestal is fixed on the car body side of hopper wagon；First limiting component, it is described
First limiting component is arranged on one end of the pedestal, and first limiting component is used for the rotation for limiting tilting member；Swing
Part, the tilting member is connected by rotatable parts with the pedestal, and the tilting member is using self gravitation around described turn
Dynamic component positive direction is rotated；Pushing mechanism, the pushing mechanism is arranged on the first bottom door, and the pushing mechanism is used to promote institute
State the rotation of tilting member opposite direction；Second limiting component, second limiting component is arranged on the second bottom door, second limit
Position part is used for the rotation for limiting second bottom door；Linkage, the linkage respectively with first bottom door and institute
The second bottom door is stated to be connected；Driving part, the driving part is connected with the linkage.
Technical scheme is described in further detail below by drawings and the specific embodiments.
The present embodiment provides a kind of device of control bottom door opening and closing, as shown in figure 1, described device includes：Pedestal 1, first
Limiting component 2, tilting member 3, rotatable parts 4, pushing mechanism 5, the first bottom door 6, the second limiting component 7, the second bottom door 8, company
Linkage 9 and driving part 10；
The pedestal 1 is by being fixedly welded on the car body side of hopper wagon；The pedestal 1 can specifically include：Axis pin base.
First limiting component 2 is by welded and installed in one end of the pedestal 1, and first limiting component 2 is used for
Limit the rotation of tilting member 3；First limiting component 2 can include：Centering block position is kept off.Wherein, when the tilting member
When free-falling is static, the line between the first limiting component 2 and the tilting member 3 rest point has one with vertical line
Individual angle so that when first limiting component 2 contacts static with the tilting member 3, the tilting member 3 is no more than vertical
Position, the rotation of the second bottom door 8 is prevented so that the limiting component 7 of tilting member 3 and second can be caused to coordinate.
The tilting member 3 is connected by rotatable parts 4 with the pedestal 1, the tilting member 3 using self gravitation around
The rotatable parts positive direction rotates (rotating clockwise)；Specifically, the rotatable parts 4 are fixed on 1 on the pedestal, described
Tilting member 3 is connected by being hinged with the rotatable parts 4.The tilting member 3 can include：Centering block；The rotatable parts 4
It can include：Rotating shaft.
The pushing mechanism 5 is arranged on the first bottom door 6, and the pushing mechanism 5 is used to promote the negative side of tilting member 3
To rotation (rotating counterclockwise)；Installation site of the pushing mechanism 5 on the first bottom door should be met：When first bottom door 6
During with second bottom door 8 for closed mode, the pushing mechanism 5 should be contacted with the tilting member 3.
Second limiting component 7 is arranged on the second bottom door 8, and second limiting component 7 is used to limit described second
The rotation of bottom door 8；Installation site of second limiting component 7 on second bottom door 8 should be met：When the first bottom door 6 and
When second bottom door 8 is closed mode, there is space between the tilting member 3 and second limiting component 7.And when described the
When two limiting components 7 are engaged the rotation to prevent the second bottom door 8 with tilting member 3, second limiting component 7 and the pendulum
Dynamic component 3 is in line contact, now, makes contact force along linear function, the straight line is perpendicular to from contact point to second bottom door 8
The line of rotating pin, it is to avoid produce the component for rotating the tilting member 3, and then 8 turns of obstruction second bottom door made
Dynamic resistance is maximum.
The linkage 9 is hinged and connected by bearing pin with first bottom door 6 and second bottom door 7 respectively, described
The piston rod of driving part 10 is hinged and connected with the linkage 9.The driving part 10 can specifically include reservoir.
In practical application, referring to Fig. 1, when the first bottom door 6 and the second bottom door 8 are closed, the tilting member 3
Can be rotated under gravity around rotatable parts 4, tilting member 3 contacted with pushing mechanism 5 after into inactive state, now, institute
State between the limiting component 7 of tilting member 3 and second and there is gap.When needing to open the door, to being filled with pressure in the driving part 10
Contracting air, the piston rod of the driving part 10 is released, and the power and rotating torque opened the door first are provided directly to the second bottom door 8, the
Two bottom doors 8 are rotated around hinging pin shaft and opened the door；First bottom door 6 is connected by linkage 9 with driving part 10, driving part
The thrust of 10 piston rods is transmitted to the first bottom door 6 by linkage 9, and the first bottom door 6 carries out door opening action.Due to the second bottom door 8
Scrap (bridge) be located in the lower section of the first bottom door 6, the second bottom door 8 is acted prior to the first bottom door 6, therefore will not hinder the first bottom door 6
Unlatching.
Referring to Fig. 2, when the first bottom door 6 and the second bottom door 8 are completely in opening, now the pushing mechanism 5 is complete
Depart from entirely with tilting member 3, the tilting member 3 may proceed to rotate around rotatable parts 4 under gravity, upright position it
Before, the tilting member 3 is contacted with first limiting component 2 so that the remains stationary of tilting member 3.
When the first bottom door 6 and the second bottom door 8 are closed from opening, referring to Fig. 3, in the driving part 10
Compressed air is filled with, the piston rod retraction of the driving part 10 is that second bottom door 8 provides the power and rotatory force closed the door
Square, drives the second bottom door 8 to perform action of closing the door around bearing pin；Because the first bottom door 6 passes through linkage 9 and the phase of driving part 10
Even, the retraction force of the piston rod of driving part 10 is transmitted to the first bottom door 6 by linkage 9, and the first bottom door 6 is in linkage 9
Lower progress is driven to close the door rotation.When the second bottom door 8 turns to certain position, the second limiting component 7 and pendulum on the second bottom door 8
Dynamic component 3 is contacted, and the state that is in line, and the second bottom door 8 is stopped by tilting member 3, stops operating.Now driving part 10 is lived
The retraction drivening rod mechanism 9 of stopper rod is moved, and continues to drive the rotation of the first bottom door 6 to close the door.And because the second bottom door 8 stops transporting
It is dynamic, therefore the lockup of the second bottom door 8 lags behind the first bottom door 6, when the first bottom door 6 move to close to close the door position when, institute
State the contact tilting member 3 of the pushing mechanism 5 on the first bottom door 6 and promote tilting member 3 to be rotated around rotatable parts 4, make swing part
Part 3 departs from the second limiting component 7, and the second limiting component 7 no longer hinders the motion of the second bottom door 8, and the second bottom door 8 starts to hold again
Row is closed the door action, therefore the first bottom door 6 is prior to the door-closing in-place of the second bottom door 8, the bottom door of the second bottom door 8 is sealed scrap (bridge) positioned at the
One bottom door 6 seals the lower section of scrap (bridge).
Embodiment two
The present embodiment provides the control bottom that the offer of embodiment one is provided with a kind of railway hopper car, the railway hopper car
The device of door opening and closing, as shown in figure 1, described device includes：Pedestal 1, the first limiting component 2, tilting member 3, rotatable parts 4,
Pushing mechanism 5, the first bottom door 6, the second limiting component 7, the second bottom door 8, linkage 9 and driving part 10；
The pedestal 1 is by being fixedly welded on the car body side of hopper wagon；The pedestal 1 can specifically include：Axis pin base.
First limiting component 2 is by welded and installed in one end of the pedestal 1, and first limiting component 2 is used for
Limit the rotation of tilting member 3；First limiting component 2 can include：Centering block position is kept off.Wherein, when the tilting member
When free-falling is static, the line between the first limiting component 2 and the tilting member 3 rest point has one with vertical line
Individual angle so that when first limiting component 2 contacts static with the tilting member 3, the tilting member 3 is no more than vertical
Position, the rotation of the second bottom door 8 is prevented so that the limiting component 7 of tilting member 3 and second can be caused to coordinate.
The tilting member 3 is connected by rotatable parts 4 with the pedestal 1, the tilting member 3 using self gravitation around
The rotatable parts positive direction rotates (rotating clockwise)；Specifically, the rotatable parts 4 are fixed on 1 on the pedestal, described
Tilting member 3 is connected by being hinged with the rotatable parts 4.The tilting member 3 can include：Centering block；The rotatable parts 4
It can include：Rotating shaft.
The pushing mechanism 5 is arranged on the first bottom door 6, and the pushing mechanism 5 is used to promote the negative side of tilting member 3
To rotation (rotating counterclockwise)；Installation site of the pushing mechanism 5 on the first bottom door should be met：When first bottom door 6
During with second bottom door 8 for closed mode, the pushing mechanism 5 should be contacted with the tilting member 3.
Second limiting component 7 is arranged on the second bottom door 8, and second limiting component 7 is used to limit described second
The rotation of bottom door 8；Installation site of second limiting component 7 on second bottom door 8 should be met：When the first bottom door 6 and
When second bottom door 8 is closed mode, there is space between the tilting member 3 and second limiting component 7.And when described the
When two limiting components 7 are engaged the rotation to prevent the second bottom door 8 with tilting member 3, second limiting component 7 and the pendulum
Dynamic component 3 is in line contact, now, makes contact force along linear function, the straight line is perpendicular to from contact point to second bottom door 8
The line of rotating pin, it is to avoid produce the component for rotating the tilting member 3, and then 8 turns of obstruction second bottom door made
Dynamic resistance is maximum.
The linkage 9 is hinged and connected by bearing pin with first bottom door 6 and second bottom door 7 respectively, described
The piston rod of driving part 10 is hinged and connected with the linkage 9.
In practical application, referring to Fig. 1, when the first bottom door 6 and the second bottom door 8 are closed, the tilting member 3
Can be rotated under gravity around rotatable parts 4, tilting member 3 contacted with pushing mechanism 5 after into inactive state, now, institute
State between the limiting component 7 of tilting member 3 and second and there is gap.When needing to open the door, to being filled with pressure in the driving part 10
Contracting air, the piston rod of the driving part 10 is released, and the power and rotating torque opened the door first are provided directly to the second bottom door 8, the
Two bottom doors 8 are rotated around hinging pin shaft and opened the door；First bottom door 6 is connected by linkage 9 with driving part 10, driving part
The thrust of 10 piston rods is transmitted to the first bottom door 6 by linkage 9, and the first bottom door 6 carries out door opening action.Due to the second bottom door 8
Scrap (bridge) be located in the lower section of the first bottom door 6, the second bottom door 8 is acted prior to the first bottom door 6, therefore will not hinder the first bottom door 6
Unlatching.
Referring to Fig. 2, when the first bottom door 6 and the second bottom door 8 are completely in opening, now the pushing mechanism 5 is complete
Depart from entirely with tilting member 3, the tilting member 3 may proceed to rotate around rotatable parts 4 under gravity, upright position it
Before, the tilting member 3 is contacted with first limiting component 2 so that the remains stationary of tilting member 3.
When the first bottom door 6 and the second bottom door 8 are closed from opening, referring to Fig. 3, in the driving part 10
Compressed air is filled with, the piston rod retraction of the driving part 10 is that second bottom door 8 provides the power and rotatory force closed the door
Square, drives the second bottom door 8 to perform action of closing the door around bearing pin；Because the first bottom door 6 passes through linkage 9 and the phase of driving part 10
Even, the retraction force of the piston rod of driving part 10 is transmitted to the first bottom door 6 by linkage 9, and the first bottom door 6 is in linkage 9
Lower progress is driven to close the door rotation.When the second bottom door 8 turns to certain position, the second limiting component 7 and pendulum on the second bottom door 8
Dynamic component 3 is contacted, and the state that is in line, and the second bottom door 8 is stopped by tilting member 3, stops operating.Now driving part 10 is lived
The retraction drivening rod mechanism 9 of stopper rod is moved, and continues to drive the rotation of the first bottom door 6 to close the door.And because the second bottom door 8 stops transporting
It is dynamic, therefore the lockup of the second bottom door 8 lags behind the first bottom door 6, when the first bottom door 6 move to close to close the door position when, institute
State the contact tilting member 3 of the pushing mechanism 5 on the first bottom door 6 and promote tilting member 3 to be rotated around rotatable parts 4, make swing part
Part 3 departs from the second limiting component 7, and the second limiting component 7 no longer hinders the motion of the second bottom door 8, and the second bottom door 8 starts to hold again
Row is closed the door action, therefore the first bottom door 6 is prior to the door-closing in-place of the second bottom door 8, the bottom door of the second bottom door 8 is sealed scrap (bridge) positioned at the
One bottom door 6 seals the lower section of scrap (bridge).
The beneficial effect that the device and railway hopper car of control bottom door opening and closing provided in an embodiment of the present invention can be brought is at least
It is：
The invention provides a kind of device and railway hopper car of control bottom door opening and closing, described device includes：Pedestal, it is described
Pedestal is fixed on the car body side of hopper wagon；First limiting component, first limiting component is arranged on one end of the pedestal,
First limiting component is used for the rotation for limiting tilting member；Tilting member, the tilting member passes through rotatable parts and institute
State pedestal to be connected, the tilting member is rotated using self gravitation around the rotatable parts positive direction；Pushing mechanism, the promotion
Part is arranged on the first bottom door, and the pushing mechanism is used to promote the tilting member opposite direction to rotate；Second limiting component,
Second limiting component is arranged on the second bottom door, and second limiting component is used for the rotation for limiting second bottom door；
Linkage, the linkage is connected with first bottom door and second bottom door respectively；Driving part, the drive division
Part is connected with the linkage；In this way, when hopper wagon bottom door needs to close in opening, driving part driving second
Bottom door is rotated and closed the door, and is closed the door while linkage drives the first bottom door to rotate, when the second limiting component connects with the tilting member
When touching, the tilting member may be prevented from the second bottom door and be rotated further, and the first bottom door then may proceed to rotate, therefore the first bottom door
Perform the action closed the door, when the pushing mechanism on the first bottom door is contacted with tilting member, will can push open prior to the second bottom door
Tilting member, thus can cause the second bottom door to continue executing with action of closing the door, it is ensured that the first bottom door first closes closing the door in place
Sequentially；And when hopper wagon bottom door is closed needing to open, driving part drives the second bottom door to rotate and opened the door, connect simultaneously
Linkage drives the first bottom door to rotate and opened the door, it is ensured that the second bottom door first reaches the enabling order of position；So, using only need utilize
One driving part is that opening and closing can be achieved, the control piper complicated without arrangement, simplifies the overall structure of control system, reduces
Production cost and maintenance cost.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of device of control bottom door opening and closing, it is characterised in that described device includes：
Pedestal, the pedestal is fixed on the car body side of hopper wagon；
First limiting component, first limiting component is arranged on one end of the pedestal, and first limiting component is used to limit
The rotation of tilting member processed；
Tilting member, the tilting member is connected by rotatable parts with the pedestal, and the tilting member utilizes self gravitation
Rotated around the rotatable parts positive direction；
Pushing mechanism, the pushing mechanism is arranged on the first bottom door, and the pushing mechanism is used to promote the tilting member anti-
Direction is rotated；
Second limiting component, second limiting component is arranged on the second bottom door, and second limiting component is used to limit institute
State the rotation of the second bottom door；
Linkage, the linkage is connected with first bottom door and second bottom door respectively；
Driving part, the driving part is connected with the linkage.
2. device as claimed in claim 1, it is characterised in that when the tilting member free-falling is static, described first
There is an angle with vertical line in the line between limiting component and the tilting member rest point.
3. device as claimed in claim 1, it is characterised in that the tilting member passes through rotatable parts and the pedestal phase
Connect, including：
The rotatable parts are fixed on the pedestal, and the tilting member is connected by being hinged with the rotatable parts.
4. device as claimed in claim 1, it is characterised in that when first bottom door and second bottom door are closed mode
When, the pushing mechanism is contacted with the tilting member, there is space between the tilting member and second limiting component.
5. device as claimed in claim 1, it is characterised in that the pedestal includes：Axis pin base.
6. device as claimed in claim 1, it is characterised in that pushing mechanism includes：Push away iron.
7. device as claimed in claim 1, it is characterised in that rotatable parts include：Rotating shaft.
8. device as claimed in claim 1, it is characterised in that the tilting member includes：Centering block.
9. device as claimed in claim 1, it is characterised in that second limiting component includes：Block.
10. a kind of railway hopper car, it is characterised in that the hopper wagon includes the control bottom as described in claim 1 to 9 is any
The device of door opening and closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710447538.0A CN107226100B (en) | 2017-06-14 | 2017-06-14 | A kind of device and railway hopper car controlling bottom door opening and closing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710447538.0A CN107226100B (en) | 2017-06-14 | 2017-06-14 | A kind of device and railway hopper car controlling bottom door opening and closing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107226100A true CN107226100A (en) | 2017-10-03 |
| CN107226100B CN107226100B (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710447538.0A Active CN107226100B (en) | 2017-06-14 | 2017-06-14 | A kind of device and railway hopper car controlling bottom door opening and closing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108466626A (en) * | 2018-05-31 | 2018-08-31 | 中车长江车辆有限公司 | A kind of bottom door device and railway hopper car |
| CN111038536A (en) * | 2019-12-25 | 2020-04-21 | 中车长江车辆有限公司 | Single-opening pressure bar type bottom door opening and closing mechanism and hopper car |
| CN114148358A (en) * | 2021-11-30 | 2022-03-08 | 中车齐齐哈尔车辆有限公司 | Vehicle door opening and closing device and vehicle |
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| CN108466626A (en) * | 2018-05-31 | 2018-08-31 | 中车长江车辆有限公司 | A kind of bottom door device and railway hopper car |
| CN111038536A (en) * | 2019-12-25 | 2020-04-21 | 中车长江车辆有限公司 | Single-opening pressure bar type bottom door opening and closing mechanism and hopper car |
| CN111038536B (en) * | 2019-12-25 | 2021-02-26 | 中车长江车辆有限公司 | Single-opening pressure bar type bottom door opening and closing mechanism and hopper car |
| CN114148358A (en) * | 2021-11-30 | 2022-03-08 | 中车齐齐哈尔车辆有限公司 | Vehicle door opening and closing device and vehicle |
| WO2023098068A1 (en) * | 2021-11-30 | 2023-06-08 | 中车齐齐哈尔车辆有限公司 | Vehicle door opening and closing device, and vehicle |
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| Publication number | Publication date |
|---|---|
| CN107226100B (en) | 2019-03-08 |
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