CN105270423A - False opening preventing structure for discharging door of ore discharging car - Google Patents
False opening preventing structure for discharging door of ore discharging car Download PDFInfo
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- CN105270423A CN105270423A CN201510770408.1A CN201510770408A CN105270423A CN 105270423 A CN105270423 A CN 105270423A CN 201510770408 A CN201510770408 A CN 201510770408A CN 105270423 A CN105270423 A CN 105270423A
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- door leaf
- railway carriage
- ore
- bracing
- strutting arrangement
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Abstract
The invention discloses a false opening preventing structure for a discharging door of an ore discharging car, which belongs to the technical field of locomotive carriages. As the upper part of a door leaf is hinged on the carriage, a rotating shaft is arranged at the bottom of the carriage, a pull rod is arranged on the rotating shaft and the rotating shaft is hinged with the lower part of the door leaf through a connecting rod, the door leaf is opened and closed due to forward and reverse rotations of the rotating shaft; a pre-tensioning device is arranged on the carriage; a supporting device is arranged in a corresponding position of the door leaf; the pre-tensioning device is pressed through the supporting device so that the door leaf is subjected to an uninterrupted pre-tensioning force when being closed; therefore, a situation that the door is falsely opened when a door closing connecting rod mechanism loses a self-locking force due to force losing over a dead point is prevented.
Description
Technical field
The present invention relates to locomotive box technology field, particularly a kind of ore dummy car Dump gate avoiding improper opening structure.
Background technology
At present, in international Ore Transportation industry, adopt an ore hopper car shedding mechanism used of automatic discharging, dead point certain distance is crossed by Dou Shi mechanism substantially, under the thrust produced by weight of material makes vehicle discharge system be in self-locking state all the time.But ore hopper car is under complete vehicle curb condition, vehicle discharge system as discharging door leaf exists vertical or horizontal on gap or degree of freedom, when vehicle is subject to impact on the direction such as vertical or horizontal, vertical or vibration, Dump gate dead point of likely moving unlocks and opens shedding mechanism, cause the consequence that cannot feed, so pendulum has so problem in face of us at present, be exactly how to prevent door leaf from opening in vehicle operation by the improvement of physical construction by mistake.
Summary of the invention
The object of the invention is: the problem solving prior art, a kind of ore dummy car Dump gate avoiding improper opening structure is proposed, effectively can eliminate the movement clearance of shedding mechanism inside, prevent different sound, vehicle shedding mechanism effectively can be prevented again to be given a shock in operational process and to cause locking connecting rod mechanism lose self-lock force thus produce the phenomenon opening by mistake action, and this programme adopts pure physical construction, later maintenance cost is low, and very safe and reliable, various severe operating mode can be adapted to, and required predetermincd tension can be adjusted as required.
The technical solution used in the present invention is as follows:
A kind of ore dummy car Dump gate avoiding improper opening structure, comprise: railway carriage, described railway carriage is provided with door opening, with the door leaf of described door opening folding, described door leaf top and railway carriage hinged, described door leaf can rotate around railway carriage, described railway carriage bottom is provided with rotating shaft, described rotating shaft is provided with pull bar, described pull bar is hinged with connecting rod, the other end of described connecting rod and door leaf lower hinge, thus formation connecting rod mechanism, forward and reverse rotation of described rotating shaft drives door leaf motion, thus realize the opening and closing of door leaf, described roller end is provided with limiting stopper, limited post is provided with bottom described railway carriage, described rotating shaft makes limiting stopper contact with limited post when door leaf cuts out, described railway carriage is positioned at outside door opening and is provided with pre-tightening apparatus, described door leaf is provided with bracing or strutting arrangement, described pre-tightening apparatus and bracing or strutting arrangement form mistaken opening preventer, described door leaf cuts out front pre-tightening apparatus and first contacts with bracing or strutting arrangement, until bracing or strutting arrangement compression pre-tightening apparatus when closing tight completely, namely when door leaf is closed tight, bracing or strutting arrangement exists with pre-tightening apparatus and has the predetermincd tension that two parts are separated.
Owing to have employed above-mentioned technical scheme, by the positive and negative rotation of rotating shaft, drive the motion of pipe link, connecting rod drives door leaf motion, realize on-off action, when closing door leaf, under the extruding of goods inside and the Action of Gravity Field of door leaf itself, the connecting rod mechanism that pull bar and connecting rod are formed is held in shortly past dead point in the scope of effective self-locking, but because the connection between each parts total exists gap, and gap can be made increasing along with the wearing and tearing of use procedure, and also there are vibrations in vehicle operation, there is the possibility making door leaf lose goods extruding instantaneously, and a general rotating shaft drives two door leafs simultaneously, also there is the situation of unbalance stress simultaneously, lose the function of self-locking so connecting rod mechanism movement probably can be made to cross dead point and door leaf is opened, light then cause cannot splendid attire goods, heavy then cause motorcycle safety accident, and by being provided with the mistaken opening preventer of pre-tightening apparatus and bracing or strutting arrangement composition, door leaf is made to compress pre-tightening apparatus by bracing or strutting arrangement before closedown, make to there is a predetermincd tension between door leaf and railway carriage, all the time hold out against door leaf so when driving and be positioned at the effective district of self-locking, can prevent door leaf from losing antagonistic force and dead point of moving by actv., self-locking is caused to be lost efficacy, and owing to have compressed pre-tightening apparatus in the process of closing the door, also the closing process of door leaf is made to have the effect of buffering, thus the shock also further mitigated between door leaf and railway carriage, the service life of railway carriage can be extended.
A kind of ore dummy car Dump gate avoiding improper opening structure of the present invention, described pre-tightening apparatus comprises: mount pad, leaf spring and connecting device, described mount pad is fixed on railway carriage, described leaf spring is fixed on mount pad by connecting device, described leaf spring comprises straight canned paragraph and straight active section, and connect the tilting section of straight canned paragraph and straight active section, when described door leaf cuts out, straight active section contacts with bracing or strutting arrangement, the characteristic of self being arranged through leaf spring like this realizes oppressing the pretension of bracing or strutting arrangement thus realizing the function of avoiding improper opening, generally, mount pad is board-like material, shape is " L shape ", it is while be connected with railway carriage, another side railway carriage is vertical, at installation seat surface upper junction plate spring, and bracing or strutting arrangement is generally positioned at the outside with door opening bound fraction, the normal opening and closing of door leaf can not be had influence on like this, and bracing or strutting arrangement is parallel with one side of mount pad when closing, but there is certain distance in the vertical direction in two parts, also there is dislocation in plane, but two-part center line conllinear, also be the requirement in order to meet leaf spring design, the straight canned paragraph of leaf spring and base are fitted, the straight active section of leaf spring and bracing or strutting arrangement are fitted, but under state of nature, straight canned paragraph and the vertical distance of straight active section are greater than the vertical distance of bracing or strutting arrangement and that face vertical with railway carriage on base when door leaf cuts out.
A kind of ore dummy car Dump gate avoiding improper opening structure of the present invention, adopt between described mount pad and railway carriage and be welded to connect, described connecting device is that bolt connects or rivet interlacement, such setting makes the connection of base and railway carriage more reliable, connecting device is used to use bolt then more easy to install and replace, thus reduction maintenance difficulties, adopt rivet interlacement then can be effectively locking, and can prevent from artificially free-handly causing damage to connecting device.
A kind of ore dummy car Dump gate avoiding improper opening structure of the present invention, described pre-tightening apparatus comprises: chassis, spring and working plate, described chassis is fixed on railway carriage, described spring one end is connected on chassis, the described spring other end is connected with working plate, when described door leaf cuts out, working plate contacts with bracing or strutting arrangement, being arranged through like this arranges spring realization buffering and lasting predetermincd tension between door leaf and box body, and chassis and the setting of working plate are then to better realize being connected and working more smoothly.
A kind of ore dummy car Dump gate avoiding improper opening structure of the present invention, also length adjustment device is provided with between described chassis and working plate, described length adjustment device is connected with working plate by block, described working plate is provided with the counter sink held for block with block place, arranging like this can the height of regulating spring as required, thus can adapt to the buffer distance of door leaf and railway carriage according to different situations.The setting of counter sink then can make the contact surface between working plate and bracing or strutting arrangement larger, improves the reliability of work.
A kind of ore dummy car Dump gate avoiding improper opening structure of the present invention, described length adjustment device is positioned at the axle center place of spring, and such setting can make spring stress more even, prevents working plate plane and bracing or strutting arrangement from cannot fit completely.
A kind of ore dummy car Dump gate avoiding improper opening structure of the present invention, described length adjustment device is steel wire or nylon rope, such setting makes control apparatus in control process, and unnecessary material can be contained in spring inner, can not affect normal buffering and provide predetermincd tension.
Owing to have employed above-mentioned technical scheme, the invention has the beneficial effects as follows: the problem solving prior art, a kind of ore dummy car Dump gate avoiding improper opening structure is proposed, effectively can eliminate the movement clearance of shedding mechanism inside, prevent different sound, vehicle shedding mechanism effectively can be prevented again to be given a shock in operational process and to cause locking connecting rod mechanism lose self-lock force thus produce the phenomenon opening by mistake action, and this programme adopts pure physical construction, later maintenance cost is low, and very safe and reliable, various severe operating mode can be adapted to, and required predetermincd tension can be adjusted as required.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is a kind of ore dummy car Dump gate avoiding improper opening structure door opening state schematic diagram of the present invention;
Fig. 2 is that a kind of ore dummy car Dump gate avoiding improper opening structure of the present invention is closed the door view;
Fig. 3 is the birds-eye view of a kind of ore dummy car Dump gate avoiding improper opening structure of the present invention;
Fig. 4 is a kind of ore dummy car Dump gate avoiding improper opening arrangement holding device Local map of the present invention;
Fig. 5 is a kind of the first embodiment schematic diagram of ore dummy car Dump gate avoiding improper opening structure pre-tightening apparatus of the present invention;
Fig. 6 is a kind of ore dummy car Dump gate avoiding improper opening structure pre-tightening apparatus the second embodiment schematic diagram of the present invention;
Fig. 7 is a kind of ore dummy car Dump gate avoiding improper opening structure door leaf of the present invention and bracing or strutting arrangement relative position figure;
Mark in figure
1-railway carriage, 2-door leaf, 3-rotating shaft, 4-connecting rod, 5-limited post, 6-pre-tightening apparatus, 7-bracing or strutting arrangement, 8-mount pad, 81-connecting device, 82-leaf spring, 9-working plate, 91-chassis, 92-spring, 93-length adjustment device, 94-block.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1:
As Fig. 1-5 and the first embodiment that Figure 7 shows that a kind of ore dummy car of the present invention Dump gate avoiding improper opening structure, a kind of ore dummy car Dump gate avoiding improper opening structure, comprise: railway carriage 1, described railway carriage 1 is provided with door opening 11, with the door leaf 2 of described door opening folding, described door leaf 2 top and railway carriage 1 hinged, described door leaf 2 can rotate around railway carriage 1, described railway carriage bottom is provided with rotating shaft 3, described rotating shaft 3 is provided with pull bar, described pull bar is hinged with connecting rod 4, the other end of described connecting rod 4 and door leaf lower hinge, thus formation connecting rod mechanism, forward and reverse rotation of described rotating shaft 3 drives door leaf 2 to move, thus realize the opening and closing of door leaf 2, described rotating shaft 3 end is provided with limiting stopper 31, limited post 5 is provided with bottom described railway carriage, described rotating shaft 3 makes limiting stopper 31 contact with limited post 5 when door leaf cuts out, described railway carriage 1 is positioned at outside door opening 11 and is provided with pre-tightening apparatus 6, described door leaf 2 is provided with bracing or strutting arrangement 7, described pre-tightening apparatus 6 and bracing or strutting arrangement 7 form mistaken opening preventer, described door leaf 2 cuts out front pre-tightening apparatus 6 and first contacts with bracing or strutting arrangement 7, until bracing or strutting arrangement 7 compresses pre-tightening apparatus 6 when closing tight completely, namely when door leaf 2 is closed tight, bracing or strutting arrangement 7 exists with pre-tightening apparatus 6 and has the predetermincd tension that two parts are separated, owing to have employed above-mentioned technical scheme, by the positive and negative rotation of rotating shaft, drive the motion of pipe link, connecting rod drives door leaf motion, realize on-off action, when closing door leaf, under the extruding of goods inside and the Action of Gravity Field of door leaf itself, the connecting rod mechanism that pull bar and connecting rod are formed is held in shortly past dead point in the scope of effective self-locking, but because the connection between each parts total exists gap, and gap can be made increasing along with the wearing and tearing of use procedure, and also there are vibrations in vehicle operation, there is the possibility making door leaf lose goods extruding instantaneously, and a general rotating shaft drives two door leafs simultaneously, also there is the situation of unbalance stress simultaneously, lose the function of self-locking so connecting rod mechanism movement probably can be made to cross dead point and door leaf is opened, light then cause cannot splendid attire goods, heavy then cause motorcycle safety accident, and by being provided with the mistaken opening preventer of pre-tightening apparatus and bracing or strutting arrangement composition, door leaf is made to compress pre-tightening apparatus by bracing or strutting arrangement before closedown, make to there is a predetermincd tension between door leaf and railway carriage, all the time hold out against door leaf so when driving and be positioned at the effective district of self-locking, can prevent door leaf from losing antagonistic force and dead point of moving by actv., self-locking is caused to be lost efficacy, and owing to have compressed pre-tightening apparatus in the process of closing the door, also the closing process of door leaf is made to have the effect of ring buffering, thus the shock also further mitigated between door leaf and railway carriage, the service life of railway carriage can be extended, described pre-tightening apparatus 6 comprises: mount pad 8, leaf spring 82 and connecting device 81, described mount pad 8 is fixed on railway carriage 1, described leaf spring 82 is fixed on mount pad 8 by connecting device 81, described leaf spring comprises straight canned paragraph and straight active section, and connect the tilting section of straight canned paragraph and straight active section, when described door leaf 2 cuts out, straight active section contacts with bracing or strutting arrangement 7, the characteristic of self being arranged through leaf spring like this realizes oppressing the pretension of bracing or strutting arrangement thus realizing the function of avoiding improper opening, generally, mount pad is board-like material, shape is " L shape ", it is while be connected with railway carriage, another side railway carriage is vertical, at installation seat surface upper junction plate spring, and bracing or strutting arrangement is generally positioned at the outside with door opening bound fraction, the normal opening and closing of door leaf can not be had influence on like this, and bracing or strutting arrangement is parallel with one side of mount pad when closing, but there is certain distance in the vertical direction in two parts, also there is dislocation in plane, but two-part center line conllinear, also be the requirement in order to meet leaf spring design, the straight canned paragraph of leaf spring and base are fitted, the straight active section of leaf spring and bracing or strutting arrangement are fitted, but under state of nature, straight canned paragraph and the vertical distance of straight active section are greater than the vertical distance of bracing or strutting arrangement and that face vertical with railway carriage on base when door leaf cuts out, adopt between described mount pad 8 and railway carriage 1 and be welded to connect, described connecting device 81 is bolt connection or rivet interlacement, such setting makes the connection of base and railway carriage more reliable, connecting device is used to use bolt then more easy to install and replace, thus reduction maintenance difficulties, adopt rivet interlacement then can be effectively locking, and can prevent from artificially free-handly causing damage to connecting device.
Embodiment 2:
As Fig. 1-4 and Fig. 6-7 is depicted as the 2nd kind of embodiment of a kind of ore dummy car of the present invention Dump gate avoiding improper opening structure, basic content is identical with embodiment 1, difference is pre-tightening apparatus 6, not repeating a bit of other, described pre-tightening apparatus 6 comprises: chassis 91, spring 92 and working plate 9, described chassis 91 is fixed on railway carriage 1, described spring 92 one end is connected on chassis 91, described spring 92 other end is connected with working plate 9, when described door leaf 2 cuts out, working plate 9 contacts with bracing or strutting arrangement 7, being arranged through like this arranges spring realization buffering and lasting predetermincd tension between door leaf and box body, chassis and the setting of working plate are then to better realize being connected and working more smoothly, length adjustment device 93 is also provided with between described chassis 91 and working plate 9, described length adjustment device 93 is connected with working plate 9 by block 94, described working plate 9 is provided with the counter sink held for block 94 with block 94 place, arranging like this can the height of regulating spring as required, thus the buffer distance of door leaf and railway carriage can be adapted to according to different situations.The setting of counter sink then can make the contact surface between working plate and bracing or strutting arrangement larger, the reliability of raising work, described length adjustment device 93 is positioned at the axle center place of spring 92, such setting can make spring stress more even, prevent working plate plane and bracing or strutting arrangement from cannot fit completely, described length adjustment device 93 is steel wire or nylon rope, such setting makes control apparatus in control process, unnecessary material can hold and spring inner, can not affect normal buffering and provide predetermincd tension.
Beneficial effect of the present invention: the problem solving prior art, a kind of ore dummy car Dump gate avoiding improper opening structure is proposed, effectively can eliminate the movement clearance of shedding mechanism inside, prevent different sound, vehicle shedding mechanism effectively can be prevented again to be given a shock in operational process and to cause locking connecting rod mechanism lose self-lock force thus produce the phenomenon opening by mistake action, and this programme adopts pure physical construction, later maintenance cost is low, and very safe and reliable, various severe operating mode can be adapted to, and required predetermincd tension can be adjusted as required.
The foregoing is only the preferred embodiment of invention, not in order to limit the present invention, any amendment done within all spirit at this and principle, equivalently to replace and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. an ore dummy car Dump gate avoiding improper opening structure, it is characterized in that, comprise: railway carriage (1), described railway carriage (1) is provided with door opening (11), with the door leaf (2) of described door opening folding, described door leaf (2) top and railway carriage (1) hinged, described door leaf (2) can rotate around railway carriage (1), described railway carriage bottom is provided with rotating shaft (3), described rotating shaft (3) is provided with pull bar, described pull bar is hinged with connecting rod (4), the other end of described connecting rod (4) and door leaf lower hinge, thus formation connecting rod mechanism, forward and reverse rotation of described rotating shaft (3) drives door leaf (2) motion, thus realize the opening and closing of door leaf (2), described rotating shaft (3) end is provided with limiting stopper (31), limited post (5) is provided with bottom described railway carriage, described rotating shaft (3) makes limiting stopper (31) contact with limited post (5) when door leaf cuts out, described railway carriage (1) is positioned at door opening (11) outside and is provided with pre-tightening apparatus (6), described door leaf (2) is provided with bracing or strutting arrangement (7), described pre-tightening apparatus (6) and bracing or strutting arrangement (7) form mistaken opening preventer, described door leaf (2) cuts out front pre-tightening apparatus (6) and first contacts with bracing or strutting arrangement (7), until bracing or strutting arrangement (7) compression pre-tightening apparatus (6) when closing tight completely, namely when door leaf (2) is closed tight, bracing or strutting arrangement (7) exists with pre-tightening apparatus (6) and has the predetermincd tension that two parts are separated.
2. a kind of ore dummy car Dump gate avoiding improper opening structure according to claim 1, it is characterized in that, described pre-tightening apparatus (6) comprising: mount pad (8), leaf spring (82) and connecting device (81), described mount pad (8) is fixed on railway carriage (1), described leaf spring (82) is fixed on mount pad (8) by connecting device (81), described leaf spring comprises straight canned paragraph and straight active section, and connecting the tilting section of straight canned paragraph and straight active section, when described door leaf (2) cuts out, straight active section contacts with bracing or strutting arrangement (7).
3. a kind of ore dummy car Dump gate avoiding improper opening structure according to claim 2, is characterized in that, adopt and be welded to connect between described mount pad (8) and railway carriage (1), and described connecting device (81) is bolt connection or rivet interlacement.
4. a kind of ore dummy car Dump gate avoiding improper opening structure according to claim 1, it is characterized in that, described pre-tightening apparatus (6) comprising: chassis (91), spring (92) and working plate (9), described chassis (91) is fixed on railway carriage (1), described spring (92) one end is connected on chassis (91), described spring (92) other end is connected with working plate (9), and when described door leaf (2) cuts out, working plate (9) contacts with bracing or strutting arrangement (7).
5. a kind of ore dummy car Dump gate avoiding improper opening structure according to claim 4, it is characterized in that, length adjustment device (93) is also provided with between described chassis (91) and working plate (9), described length adjustment device (93) is connected with working plate (9) by block (94), and on described working plate (9) and block (94) place is provided with the counter sink held for block (94).
6. a kind of ore dummy car Dump gate avoiding improper opening structure according to claim 5, it is characterized in that, described length adjustment device (93) is positioned at the axle center place of spring (92).
7. a kind of ore dummy car Dump gate avoiding improper opening structure according to claim 5, it is characterized in that, described length adjustment device (93) is steel wire or nylon rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510770408.1A CN105270423B (en) | 2015-11-12 | 2015-11-12 | A kind of anti-error opening structure of ore dummy car Dump gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510770408.1A CN105270423B (en) | 2015-11-12 | 2015-11-12 | A kind of anti-error opening structure of ore dummy car Dump gate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105270423A true CN105270423A (en) | 2016-01-27 |
| CN105270423B CN105270423B (en) | 2017-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510770408.1A Active CN105270423B (en) | 2015-11-12 | 2015-11-12 | A kind of anti-error opening structure of ore dummy car Dump gate |
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| CN (1) | CN105270423B (en) |
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| US3654873A (en) * | 1970-04-20 | 1972-04-11 | Midland Ross Corp | Tandem toggle hopper door operating mechanisms |
| US4366757A (en) * | 1980-11-20 | 1983-01-04 | Ortner Freight Car Company | Actuating and locking means for the hopper doors of a railroad hopper car |
| CN201932162U (en) * | 2010-12-17 | 2011-08-17 | 南车长江车辆有限公司 | Bottom door switching device of railway hopper wagon |
| CN202557541U (en) * | 2012-04-28 | 2012-11-28 | 齐齐哈尔轨道交通装备有限责任公司 | Anti-bouncer of bottom door and bottom-opened hopper car |
| CN202743242U (en) * | 2012-08-07 | 2013-02-20 | 南车长江车辆有限公司 | Vehicle bottom door opening and closing device |
| CN103303324A (en) * | 2013-07-01 | 2013-09-18 | 齐齐哈尔轨道交通装备有限责任公司 | Bottom door opening/closing mechanism and bottom door wagon |
| CN203511652U (en) * | 2013-05-20 | 2014-04-02 | 南车长江车辆有限公司 | Bottom door opening and closing mechanism |
| CN104890687A (en) * | 2015-06-16 | 2015-09-09 | 齐齐哈尔轨道交通装备有限责任公司 | Railway wagon body and bottom door locking mechanism thereof |
| CN205086929U (en) * | 2015-11-12 | 2016-03-16 | 中车资阳机车有限公司 | Ore dummy car unloads bin gate and prevents mistake division structure |
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2015
- 2015-11-12 CN CN201510770408.1A patent/CN105270423B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654873A (en) * | 1970-04-20 | 1972-04-11 | Midland Ross Corp | Tandem toggle hopper door operating mechanisms |
| US4366757A (en) * | 1980-11-20 | 1983-01-04 | Ortner Freight Car Company | Actuating and locking means for the hopper doors of a railroad hopper car |
| CN201932162U (en) * | 2010-12-17 | 2011-08-17 | 南车长江车辆有限公司 | Bottom door switching device of railway hopper wagon |
| CN202557541U (en) * | 2012-04-28 | 2012-11-28 | 齐齐哈尔轨道交通装备有限责任公司 | Anti-bouncer of bottom door and bottom-opened hopper car |
| CN202743242U (en) * | 2012-08-07 | 2013-02-20 | 南车长江车辆有限公司 | Vehicle bottom door opening and closing device |
| CN203511652U (en) * | 2013-05-20 | 2014-04-02 | 南车长江车辆有限公司 | Bottom door opening and closing mechanism |
| CN103303324A (en) * | 2013-07-01 | 2013-09-18 | 齐齐哈尔轨道交通装备有限责任公司 | Bottom door opening/closing mechanism and bottom door wagon |
| CN104890687A (en) * | 2015-06-16 | 2015-09-09 | 齐齐哈尔轨道交通装备有限责任公司 | Railway wagon body and bottom door locking mechanism thereof |
| CN205086929U (en) * | 2015-11-12 | 2016-03-16 | 中车资阳机车有限公司 | Ore dummy car unloads bin gate and prevents mistake division structure |
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| CN105270423B (en) | 2017-10-20 |
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