CN104859678B - One kind traction buffer unit and its draw bar - Google Patents
One kind traction buffer unit and its draw bar Download PDFInfo
- Publication number
- CN104859678B CN104859678B CN201510324581.9A CN201510324581A CN104859678B CN 104859678 B CN104859678 B CN 104859678B CN 201510324581 A CN201510324581 A CN 201510324581A CN 104859678 B CN104859678 B CN 104859678B
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- draw bar
- shaft
- side wall
- section
- wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G9/00—Draw-gear
- B61G9/20—Details; Accessories
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of draw bar, including the end at shaft and its both ends；The cross section of the shaft is the first roughly the same drum organization of the distance of inwall all directions to its centre of form, first drum organization includes being located at upper and lower horizontal segment, located at left and right arc section, transitional straight section, transition circle segmental arc are connected with turn from the arc section to the horizontal segment.The cross section of existing shaft is improved to the first drum organization by the draw bar by rectangle, first drum organization is close to round, the distance of its inwall all directions to its centre of form is roughly the same, namely the flexibility of each point approaches so that all directions of shaft have close to equal stability.As can be seen here, the shaft of the draw bar reduces shaft left and right directions size on the premise of critical pressure is ensured, overcomes the phenomenon of waste of materials in the prior art, substantially reduces the weight of shaft.In addition, the present invention also provides a kind of traction buffer unit using above-mentioned draw bar.
Description
Technical field
The present invention relates to railway freight-car technical field, more particularly to a kind of traction buffer unit and its draw bar.
Background technology
As shown in figure 1, Fig. 1 is the structural representation of draw bar buffer unit in the prior art.
The draw bar buffer unit generally includes draw bar 100, coupler yoke key 200, from plate 300, buffer 400 and couple yoke
500 grade parts, its main function are between connection vehicle, transmission train longitudinal force (tractive force and compression stress) and mitigation vehicle
Longitudinal impulse, and by installing draw bar, gap hangs in the company eliminated between hitch, improves dynamic performance.
Draw bar is for fixing between marshaling vehicle the device being attached, being installed on the end of vehicle.Traction
Bar has the characteristics that high intensity, low weight, gapless, can not only meet the requirement of heavy haul train, and reduces vehicle
Between axial clearance, so as to reduce the longitudinal impulse between train, improve train longitudinal dynamics performance, improve safety in operation,
Reduce energy resource consumption.
As shown in Figures 2 and 3, the draw bar includes shaft 1 ', is provided with located at the end 2 ' at the both ends of shaft 1 ', end 2 '
For installing the mounting hole 21 ' of coupler yoke key 200, in order to ensure casting manufacturability, shaft 1 ' is provided with six fabrication holes 11 ', with
Facilitate the positioning of core body and the cleaning of draw bar inner chamber core.
Above-mentioned draw bar has following technological deficiency：
First, as shown in figure 4, the shaft 1 ' of the draw bar is in box-structure, its rectangular in cross-section structure so that draw bar
Processing technology it is relatively simple, but the critical pressure of this structure is smaller, and the weight of whole draw bar is larger；
Secondly, as shown in Figure 3 and Figure 5, the outside wall surface of the end 2 ' of the draw bar have protrude longitudinally outward to convexity
Shoulder 22 ', the arranged on left and right sides of the centering convex shoulder 22 ' are equipped with the first cambered surface 23 ', with reference to Fig. 1, draw buffer unit from plate 300
Provided with 22 ' corresponding groove of centering convex shoulder, the second cambered surface, during installation, centering convex shoulder 22 ' and fit depressions, the first cambered surface
23 ' are engaged with the second cambered surface.When railway freight-car is along straight line moving, the centering of centering convex shoulder 22 ' and groove, which acts on, to be caused respectively
Car body is coaxially disposed, and ensures the stability of straight line moving；However, when railway freight-car turns round, needed between two car bodies certain
Bending angle, but now the cooperation of the first cambered surface 23 ' and the second cambered surface, centering convex shoulder 22 ' and groove with credit union prevent should
The generation of bending angle, cause to draw boom end 2 ' and unnecessary additional external force is born from plate 300, influence its working stability
Property；
Again, as shown in Figure 5 and Figure 6, the horizontal cross-section of the fabrication hole 11 ' on shaft 1 ' is slotted hole, the slotted hole bag
The straightway 111 ' at middle part and its arc section 112 ' at both ends are included, in the course of the work, straightway 111 ' and arc section 112 '
Easily there is stress concentration in junction；
Finally, as shown in Figure 7 and Figure 8, the fabrication hole 11 ' of shaft 1 ' sets vertical inwardly projecting boss 12 ', although increasing
The big intensity of fabrication hole 11 ', but when draw bar inner cavity water accumulation, draining can not be realized.
In view of this, it would be highly desirable to for above-mentioned technical problem, design is optimized to the draw bar of prior art, ensures that its is strong
On the premise of degree, mitigate the weight of draw bar.
The content of the invention
The purpose of the present invention is provides a kind of draw bar, by the way that the cross section of shaft is improved into the first cydariform by rectangle,
On the premise of ensureing draw bar intensity, mitigate the weight of draw bar.Another object of the present invention applies the traction to provide one kind
The traction buffer unit of bar.
In order to solve the above technical problems, the present invention provides a kind of draw bar, including the end at shaft and its both ends；The bar
The cross section of body is roughly the same the first drum organization of distance of inwall all directions to its centre of form, the first drum organization bag
Include and be located at left and right arc section, located at upper and lower horizontal segment, transition is connected with turn from the arc section to the horizontal segment
Straightway, transition circle segmental arc.
The cross section of the shaft of existing draw bar is improved to the first drum organization by the present invention by rectangle, the first cydariform knot
Structure is close to round, and the distance of its inwall all directions to its centre of form is roughly the same, namely the flexibility of each point approaches so that shaft
Have everywhere close to equal stability.As can be seen here, the shaft of the draw bar reduces on the premise of critical pressure is ensured
Shaft left and right directions size, the phenomenon of waste of materials in the prior art is overcome, substantially reduce the weight of shaft.
Preferably, the transitional straight section and the arc section, the transition circle segmental arc are tangent, the horizontal segment and institute
It is also tangent to state transition circle segmental arc.
Preferably, the wall thickness all same of the arc section, the transitional straight section and the horizontal segment.
Preferably, the outside wall surface of the end is sphere.
Preferably, longitudinally through lightening hole is set between the end and the shaft.
Preferably, the cross section of the lightening hole is the second drum organization, including located at upper and lower horizontal side wall, and point
Left curved wall that She Yu be not left and right, right curved wall.
Preferably, the left wall of the end, right wall are provided with lightening grooves.
Preferably, the shaft is provided with the fabrication hole of up/down perforation, and the horizontal cross-section of the fabrication hole is in approximate ellipsoidal
Structure, including the outer arcuate side wall located at left and right horizontal side wall, located at two outsides, and it is the connection horizontal side wall, described
Transitional straight side wall between outer arcuate side wall.
Preferably, the transitional straight side wall is connected with the horizontal side wall by the first fillet, the transitional straight side
Wall is connected with the outer arcuate side wall by the second fillet, and the transitional straight side wall and first fillet, the second fillet
It is tangent.
Preferably, the shaft is provided with the fabrication hole of up/down perforation, and the arranged on left and right sides of the fabrication hole is respectively equipped with vertical
Inwardly projecting left lug boss, right lug boss, lead between the left lug boss, the right lug boss provided with longitudinally through circulation
Road.
The present invention also provides a kind of draw bar buffer unit, including draw bar, is plugged in the mounting hole of the draw bar
Coupler yoke key；The draw bar uses draw bar as described above.
Because above-mentioned draw bar has as above technique effect, therefore, should also be as using the traction buffer unit of the draw bar
With identical technique effect, will not be repeated here.
Brief description of the drawings
Fig. 1 is the structural representation for drawing buffer unit in the prior art；
Fig. 2 is the structural representation of draw bar in Fig. 1；
Fig. 3 is the structural representation of another angles of Fig. 2；
Fig. 4 is the cross-sectional view of shaft in Fig. 3；
Fig. 5 is the top view of draw bar shown in Fig. 3；
Fig. 6 is the partial enlarged drawing of fabrication hole in Fig. 5；
Fig. 7 be in Fig. 5 A-A to sectional view；
Fig. 8 is Fig. 5 horizontal cross-section sectional view；
In Fig. 1-Fig. 8：
Draw bar 100；Coupler yoke key 200；From plate 300；Buffer 400；Couple yoke 500；
Shaft 1 '；Fabrication hole 11 '；Straightway 111 '；Arc section 112 '；Boss 12 '；
End 2 '；Mounting hole 21 '；Centering convex shoulder 22 '；First cambered surface 23 '；
Fig. 9 is a kind of structural representation of embodiment of draw bar provided by the present invention；
Figure 10 is the structural representation of the cross section of shaft in Fig. 9；
Figure 11 is the top view of draw bar shown in Fig. 9；
Figure 12 is Figure 11 B-B direction sectional view；
Figure 13 be in Figure 11 C-C to sectional view；
Figure 14 is the partial enlarged drawing of fabrication hole in Fig. 9；
Figure 15 is the structural representation of the horizontal cross-section of draw bar shown in Fig. 9.
Fig. 9 is into Figure 15：
Shaft 1；
Horizontal segment 1a；Arc section 1b；Transitional straight section 1c；Transition circle segmental arc 1d；
Fabrication hole 11；Horizontal side wall 11a；Outer arcuate side wall 11b；Transitional straight side wall 11c；First fillet 11d；Second circle
Angle 11e；
Left lug boss 111；Right lug boss 112；Circulation passage 113；
End 2；
Outside wall surface 21；
Lightening hole 22；Horizontal side wall 22a；Left curved wall 22b；Right curved wall 22c；
Lightening grooves 23；
Mounting hole 24.
Embodiment
For the core of the present invention to provide a kind of draw bar, it is each that the cross section of shaft is improved to inwall by the draw bar by rectangle
Point, apart from same shape, ensure that draw bar intensity, and alleviate the weight of draw bar to the centre of form.The present invention's is another
Core is a kind of traction buffer unit of the application draw bar of offer.
In order that those skilled in the art more fully understands technical scheme, it is below in conjunction with the accompanying drawings and specific real
Applying example, the present invention is described in further detail.
It should be noted that the definition of the herein presented noun of locality " left and right, upper and lower " is using the coordinate shown in Fig. 9 as base
Accurate and define, and define the direction of left and right extension as laterally, length direction is longitudinal direction, the direction extended up and down be it is vertical, it is and upper
The vertical plane in lower direction is horizontal plane；It should be appreciated that these nouns of locality are the usual installation positions based on draw bar in this area
Put and the use habit of technical staff is defined, define only for the purposes of description, not refer in particular to herein, therefore should not
Influence protection scope of the present invention.
Fig. 9 and Figure 10 are refer to, Fig. 9 is a kind of structural representation of embodiment of draw bar provided by the present invention
Figure；Figure 10 is the structural representation of the cross section of shaft 1 in Fig. 9.
In a kind of embodiment, as shown in Figure 9 and Figure 10, the present invention provides a kind of draw bar, including shaft 1 and
The end 2 at its both ends, end 2 are provided with the mounting hole 24 of up/down perforation, and shaft 1 is provided with the fabrication hole 11 of up/down perforation.Shaft 1
Cross section is that inwall all directions include being located to the first roughly the same drum organization of its centre of form O distance, the first drum organization
Left and right arc section 1b, located at upper and lower horizontal segment 1a, transitional straight section is connected with turn from arc section 1b to horizontal segment 1a
1c, transition circle segmental arc 1d.Here the inwall for the first drum organization that " roughly the same " refers to is largely all equal to centre of form distance, i.e.,
Respective location is set apart from unequal, also to differ very little to the centre of form.
According to mechanics of materials pressure bar stabilization relevant knowledge, improving the measure of strut stability can start with from the moment of inertia, root
According to Euler's formulaUnderstand, the moment of inertia I in section is bigger, and critical pressure Pcr is bigger；From empirical equation σcr=α-
B λ (a, b are on the occasion of) can be seen that flexibility λ is smaller, and limit stress is higher, due toSo improve radius of inertia i number
Value is with regard to that can reduce λ numerical value.It can be seen that not increasing area of section, material is placed on from cross-section centroid remotely as much as possible, to take
Larger I and i are obtained, is equivalent to improve critical pressure.
Meanwhile the equivalent length ul such as depression bar in each face is identical, radius of inertia i of the interface to any centre of form axle should be made
Equal, or close to equal, so, flexibility λ of the depression bar in any plane is equal or close to equal, then in any plane
Have equal or close to equal stability.
For a height of h of a width of b rectangle, to x-axis the moment of inertiaFor a diameter of D circle, due to symmetrical former
Cause, so
Based on above-mentioned theory, the shaft 1 of the draw bar of the rectangular in cross-section of prior art, its above-below direction and left and right are analyzed
Direction length difference is larger, and therefore, inertia is away from also differing larger, and when draw bar is pressurized, less inertia is away from IUp and downDetermine and face
Boundary's pressure, even if the moment of inertia ILeft and rightThe larger stability to shaft 1 also without in all senses, only causes the waste of material.
In view of above-mentioned analysis, the cross section of the shaft 1 of existing draw bar is improved to the first cydariform knot by the present invention by rectangle
Structure, as seen from Figure 10, first drum organization are close to round, the distance substantially phase of its inwall all directions to its centre of form O
Together, namely the flexibility of each point approaches so that shaft 1 has close to equal stability everywhere.
As can be seen here, the shaft 1 of the draw bar reduces the left and right directions chi of shaft 1 on the premise of critical pressure is ensured
It is very little, the phenomenon of waste of materials in the prior art is overcome, substantially reduces the weight of shaft 1.
For above-mentioned first drum organization, transitional straight section 1c and arc section 1b, transition circle segmental arc 1d are tangent, horizontal segment
1a is also tangent with transition circle segmental arc 1d.So so that the cross section inwall of shaft 1 is integrally smoothed curve, can avoid bar
Body 1 produces stress concentration, further increases the job stability of draw bar.
In further scheme, above-mentioned arc section 1b, transitional straight section 1c and horizontal segment 1a wall thickness all same.
Using this structure, except transition circle segmental arc 1d is due to the bending and in addition to wall thickness is slightly larger, remainder
Wall thickness is identical, and this make it that the structure of shaft 1, weight are further symmetrical, also cause all directions can bear it is critical should
Power is further identical, on the premise of limit stress is ensured, farthest reduces the weight of shaft 1.
In another embodiment, as shown in figure 9, the outside wall surface 21 of the end 2 of the draw bar is sphere.
Using this structure, the middle part of sphere is formed with the groove from plate to be coordinated, and left and right, the upper and lower surrounding of sphere is equal
With from forming gap between the groove of plate 300, namely sphere surrounding not with from plate shape into cooperation.When railway freight-car is along straight line
During walking, the middle part of sphere can equally play a part of centering so that each car body is coaxially disposed, and ensures the stabilization of straight line moving
Property.When railway freight-car turns round, sphere side reduces with the gap from plate, sphere opposite side increases with the gap from plate, can
The bending angle formed between two car bodies is flexibly adapted to, traction boom end 2 is not subject to any additional external force during this, works
Stability is preferable.
Figure 11 to Figure 13 is refer to, Figure 11 is the top view of draw bar shown in Fig. 9；Figure 12 is Figure 11 B-B direction sectional view；
Figure 13 be in Figure 11 C-C to sectional view.
Longitudinally through lightening hole 22 can be set between the end 2 of above-mentioned draw bar and shaft 1.
By stress analysis, the stress that the internal connection of end 2 and shaft 1 is subject to is very small, sets loss of weight in this place
Behind hole 22, compared with the prior art shown in Fig. 8 is not provided with the structure of lightening hole, the working stability of draw bar can not influenceed
Property on the premise of, further reduce draw bar weight.
In specific scheme, as shown in figure 13, the cross section of above-mentioned lightening hole 22 is the second drum organization, including located at
Upper and lower horizontal side wall 22a, and it is respectively arranged on left and right left curved wall 22b, right curved wall 22c.
By stress analysis, in the set location of lightening hole 22, it is left and right suffered that its upper and lower suffered stress is more than its
Stress, using said structure, the size up and down of lightening hole 22 is smaller, side-to-side dimensions are larger so that and the stress of above-below direction reduces,
Namely on the premise of the intensity of the position is ensured so that draw bar has less weight.
In addition, the shape of the lightening hole 22 and not only limiting drum organization, rectangular opening, circular port can also be set to,
Or other profiled holes.
As shown in figure 9, the left wall of the end 2 of above-mentioned draw bar, right wall are provided with lightening grooves 23.
By the stress analysis to draw bar, the stress suffered by the left wall of the end 2 of draw bar, right wall is smaller, if
The purpose for putting lightening grooves 23 is equally the further weight for reducing draw bar on the premise of proof strength.In order to avoid lightening grooves 23
The intensity of draw bar is influenceed, the depth of the lightening grooves 23 should not be too big.
As shown in figure 14, the figure is the partial enlarged drawing of fabrication hole 11 in Fig. 9.The level of the fabrication hole 11 of above-mentioned shaft 1
Section can be in approximate ellipsoidal structure, including the outer arcuate side wall located at left and right horizontal side wall 11a, located at two outsides
Transitional straight side wall 11c between 11b, and connection horizontal side wall 11a, outer arcuate side wall 11b.
Using this structure, due to passing through transitional straight side wall 11c mistakes between horizontal side wall 11a, outer arcuate side wall 11b
Cross, compared with prior art, reduce the stress concentration at fabrication hole 11.
In further scheme, transitional straight side wall 11c is connected with horizontal side wall 11a by the first fillet 11d, and transition is straight
Line side wall 11c is connected with outer arcuate side wall 11b by the second fillet 11e, and transitional straight side wall 11c and the first fillet 11d,
Two fillet 11e are tangent.
This make it that the side wall of fabrication hole 11 is smoothed curve everywhere, avoids the generation of stress concentration to greatest extent.
With reference to Figure 12 and Figure 15, Figure 15 is the structural representation of the horizontal cross-section of draw bar shown in Fig. 9.
The arranged on left and right sides of above-mentioned fabrication hole 11 is respectively equipped with vertical inwardly projecting left lug boss 111, right lug boss 112,
Longitudinally through circulation passage 113 is provided between left lug boss 111, right lug boss 112.
Using this structure, when the inner cavity water accumulation of draw bar, the 113 outside draining of circulation passage can be passed through.
It should be noted that simple, theoretically the stability of positive round tee section is better than above-mentioned first drum organization,
But, it is necessary to there is upper and lower two horizontal segment 1a shown in Figure 10 for technological angle.
Because the requirement of technique in shaft 1, it is necessary to open several fabrication holes 11, it is acted on be casting before core body positioning and
Casting, the cleaning of cooling rear haulage bar inner chamber.Fabrication hole 11 can not be too small if positioning, and otherwise sand is fragile；After having poured
Need the core body of inside to smash and pour out, because sometimes inner core has reinforcing bar, it is necessary to which cutting machine pullover puts in and cut
Broken reinforcing bar, then the fabrication hole 11 that just needs design can not be too small.
After suitable fabrication hole 11 are designed, if annular is made in section, then make in draw bar Tensile
Under, the stress suffered by the long side of fabrication hole is larger, even in the internal left lug boss 111 for setting increase intensity；Right lug boss
112, because also needing to consider draining, circular inner wall must be local concordant with no fabrication hole 11, then in fabrication hole 11
The groove (can contrast with reference to figure 15) of a U-shaped will be formed at short side, causes stress concentration.
All in all：If making circular cross-section, 11 stress concentrations at fabrication hole are it is obvious that stress is larger, therefore first
The upper and lower horizontal segment 1a of drum organization can not be too small, just in order to meet suitable fabrication hole size.
The present invention also provides a kind of draw bar buffer unit, including draw bar, is plugged in the mounting hole 24 of draw bar
Coupler yoke key；Draw bar is using draw bar as above.
Because above-mentioned draw bar has as above technique effect, therefore, should also be as using the traction buffer unit of the draw bar
With identical technique effect, will not be repeated here.
A kind of traction buffer unit provided by the present invention and its draw bar are described in detail above.Herein should
The principle and embodiment of the present invention are set forth with specific case, the explanation of above example is only intended to help and managed
Solve the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, do not departing from
On the premise of the principle of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into this hair
In bright scope of the claims.
Claims (9)
1. a kind of draw bar, including the end (2) at shaft (1) and its both ends；Characterized in that, the cross section of the shaft (1)
For the first roughly the same drum organization of the distance of inwall all directions to its centre of form, first drum organization include located at it is left,
Right arc section (1b), located at upper and lower horizontal segment (1a), is sequentially connected from the arc section (1b) to the horizontal segment (1a)
There are transitional straight section (1c), transition circle segmental arc (1d)；
Longitudinally through lightening hole (22) is set between the end (2) and the shaft (1), the lightening hole (22) it is transversal
Face is the second drum organization, including located at upper and lower horizontal side wall (22a), and it is respectively arranged on left and right left curved wall
(22b), right curved wall (22c), and the side-to-side dimensions of the lightening hole (22) are more than upper and lower size.
2. draw bar according to claim 1, it is characterised in that the transitional straight section (1c) and the arc section
(1b), the transition circle segmental arc (1d) are tangent, and the horizontal segment (1a) and the transition circle segmental arc (1d) are also tangent.
3. draw bar according to claim 2, it is characterised in that the arc section (1b), the transitional straight section (1c)
With the wall thickness all same of the horizontal segment (1a).
4. according to the draw bar described in claim any one of 1-3, it is characterised in that the outside wall surface (21) of the end (2) is
Sphere.
5. according to the draw bar described in claim any one of 1-3, it is characterised in that left wall, the right wall of the end (2) are provided with
Lightening grooves (23).
6. according to the draw bar described in claim any one of 1-3, it is characterised in that the shaft (1) is provided with up/down perforation
Fabrication hole (11), the horizontal cross-section of the fabrication hole (11) is in approximate ellipsoidal structure, including located at left and right horizontal side wall
(11a), the outer arcuate side wall (11b) located at two outsides, and the connection horizontal side wall (11a), the outer arcuate side wall
Transitional straight side wall (11c) between (11b).
7. draw bar according to claim 6, it is characterised in that the transitional straight side wall (11c) and the horizontal side
Wall (11a) is connected by the first fillet (11d), and the transitional straight side wall (11c) and the outer arcuate side wall (11b) pass through the
Two fillets (11e) connect, and the transitional straight side wall (11c) and first fillet (11d), the second fillet (11e) are homogeneous
Cut.
8. according to the draw bar described in claim any one of 1-3, it is characterised in that the shaft (1) is provided with up/down perforation
Fabrication hole (11), the arranged on left and right sides of the fabrication hole (11) are respectively equipped with vertical inwardly projecting left lug boss (111), right convex
Rise portion (112), longitudinally through circulation passage (113) is provided between the left lug boss (111), the right lug boss (112).
9. a kind of draw bar buffer unit, including draw bar (100), are plugged in the mounting hole (24) of the draw bar (100)
Coupler yoke key (200)；Characterized in that, the draw bar is using the draw bar as described in claim any one of 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510324581.9A CN104859678B (en) | 2015-06-12 | 2015-06-12 | One kind traction buffer unit and its draw bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510324581.9A CN104859678B (en) | 2015-06-12 | 2015-06-12 | One kind traction buffer unit and its draw bar |
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| CN104859678B true CN104859678B (en) | 2017-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU223188U1 (en) * | 2023-08-29 | 2024-02-05 | Акционерное Общество "Федеральная Грузовая Компания" | Tank car |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105564452A (en) * | 2015-12-29 | 2016-05-11 | 齐齐哈尔轨道交通装备有限责任公司 | Hopper car |
| CN106828532A (en) * | 2016-12-29 | 2017-06-13 | 株洲时代新材料科技股份有限公司 | City rail vehicle lightweight drawing pull bar |
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| Publication number | Publication date |
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| CN104859678A (en) | 2015-08-26 |
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Address after: 161002 Qigihar City, Heilongjiang province Tiefeng District Plant Road No. 36 Applicant after: CRRC QIQIHAR VEHICLE CO., LTD. Address before: 161002 Qigihar City, Heilongjiang province Tiefeng District Plant Road No. 36 Applicant before: Qiqihar Rail Traffic Equipment Co., Ltd. |
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