CN103192841A - Bogie and swing bolster thereof - Google Patents
Bogie and swing bolster thereof Download PDFInfo
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- CN103192841A CN103192841A CN201310108496XA CN201310108496A CN103192841A CN 103192841 A CN103192841 A CN 103192841A CN 201310108496X A CN201310108496X A CN 201310108496XA CN 201310108496 A CN201310108496 A CN 201310108496A CN 103192841 A CN103192841 A CN 103192841A
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- bogie truck
- cavity
- strut bar
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Abstract
The invention discloses a swing bolster of a bogie. The swing bolster is provided with middle cross support rods. The swing bolster is provided with a cavity (14) defined by two side walls (11), an upper cover plate (12) and a lower cover plate (13). First through holes (111) are arranged on one transverse side of the cavity (14) on the two side walls (11), and second through holes (112) are arranged on the other transverse side of the cavity (14) on the two side walls (11), so that the support rods penetrates through the first through holes (111) on one of the two side walls (11), the cavity (14) and the second through holes (112) on the other side wall (11). By means of the structure, the first support rod and the second support rod are arranged crosswise in the cavity and can penetrates through the through holes on the side walls to be connected with side frames. Accordingly, the swing bolster is applicable to the middle cross support type bogie. The invention further provides the bogie. The bogie comprises the swing bolster and has a corresponding technical effect.
Description
Technical field
The present invention relates to the rolling stock technical field, relate in particular to a kind of bogie truck and bolster thereof.
Background technology
Railway truck generally comprises parts such as car body, bogie truck, brake equipment and coupler and draft gear.Wherein, bogie truck is being born the deadweight of lade weight and car body, guide simultaneously railway truck high-speed cruising on the rectilinear orbit or on curve track turning operation, so the structure of bogie truck and technical parameter have often determined dynamic performance and the safe running performance of railway truck.
Railway goods train bogie is worldwide most widely used to be cast steel three-major-items formula bogie truck.Please refer to Fig. 1 and Fig. 2, Fig. 1 and Fig. 2 are respectively front view and the birds-eye view of three-major-items formula bogie truck; Principle of work and the technological deficiency thereof of this structure bogie truck of following brief description.
As depicted in figs. 1 and 2, so-called " three-major-items " refer to two bogie side frames 1 and a bolster 2.The central authorities of bolster 2 support lade weight and car body deadweight by truck center plate 3, the two ends of bolster 2 are supported on the bogie side frame 1 central spring cushion cap by secondary suspension system 4, the drawing strickle guide end face at bogie side frame 1 two ends is supported on the loading ability of bearing saddle 5, adapter is supported on the double-row roller bearing of wheel shaft, by two right four wheels of wheel 6 gross vehicle weight is passed to rail again.
Only depend on vertical shock attenuation unit to play damping of vibrations between the bogie side frame 1 of above-mentioned bogie truck and the bolster 2, therefore to a little less than the constraint of wheel to the displacement of shaking the head, take place easily " rhombus dislocation ", thereby cause the critical speed of vehicle serpentine locomotion to reduce, the bogie truck operation is not steady, and the abrasion between wheel and the track are serious.
For fear of above-mentioned technological deficiency, progressively develop middle cross-braced bogie, as shown in Figure 3, Fig. 3 is the keystone configuration scheme drawing of middle cross-braced bogie, first strut bar 71 and second strut bar 72 of this bogie truck are arranged in a crossed manner, namely the first end 721 of the first end 711 of first strut bar and second strut bar all is connected with a bogie side frame 1, the second end 712 of first strut bar all is connected with another bogie side frame 1 with the second end 722 of second strut bar, and two strut bars, constitute thus and intersect supporting construction in one without any connection at central infall.
Adopt this structure, can effectively strengthen anti-rhombus rigidity, avoid bogie truck generation serpentine locomotion, yet shown in Fig. 4 to 7, Fig. 4 is the front view of bolster 2 among Fig. 1, Fig. 5 is that B-B is to birds-eye view among Fig. 4, and Fig. 6 and Fig. 7 are respectively A-A, C-C among Fig. 4 to cutaway view; This bolster 2 mainly comprises two sidewalls 21 and upper cover plate 22, lower cover 23, its central cross section is provided with two studs 221 that connect upper cover plate 21 and lower cover 22, be connected with a horizontal bar 222 between two studs 221, be used for strengthening the intensity of bolster 2, the cross section of its bolster 2 centre is the box type construction of vertical opening.Obviously, this structure can not be used for passing above-mentioned two strut bars arranged in a crossed manner, so this bolster 2 is not suitable for the above-mentioned middle support type bogie truck that intersects.
In view of this, demand urgently at above-mentioned technical matters bolster of the prior art being optimized design, make it satisfy the installation requirement of cross-braced bogie in the elasticity and the requirement of safe operation.
Summary of the invention
Purpose of the present invention is for providing a kind of bolster for bogie truck, and this bolster is applicable to two strut bars of cross-braced bogie in the installation, and meets the requirement of strength of bogie truck.In addition, another object of the present invention is for providing a kind of bogie truck that comprises above-mentioned bolster.
For solving the problems of the technologies described above, the invention provides a kind of bolster for bogie truck, intersection strut bar during described bogie truck is provided with; Described bolster is provided with the cavity that is surrounded by two sidewalls, upper cover plate and lower covers in the center, two described sidewalls all are provided with first through hole, are provided with second through hole at the horizontal opposite side of described cavity in the horizontal side of described cavity, so that described strut bar penetrates, passes through second through hole of described cavity and another described sidewall from first through hole of arbitrary described sidewall.
Preferably, in described cavity, described upper cover plate is provided with that at least one stretches out, first stud of horizontally set downwards.
Preferably, in described cavity, described lower cover is provided with that at least one protrudes upward, second stud of horizontally set.
Preferably, also inwardly be provided with the 3rd stud that stretches out, vertically arranges during described cavity is interior, described the 3rd stud connects described first stud, described upper cover plate, described sidewall, described lower cover and described second stud.
Preferably, between two described first through holes, be provided with the 4th stud that at least one connects described upper cover plate and described lower cover between two described second through holes.
Preferably, described first through hole, described second through hole are transverse distance greater than the slotted hole of vertical distance.
Preferably, the lateral clearance scope of the lateral clearance of described first through hole and described strut bar, described second through hole and described strut bar is 5mm～15mm.
Preferably, the vertical gap of the vertical gap of described first through hole and described strut bar, described second through hole and described strut bar is all greater than the maximum vertical amount of deflection of described truck bolster.
Preferably, the distance of the upper limb of the distance of the upper limb of described first through hole and described upper cover plate end face, described second through hole and described upper cover plate end face is all more than or equal to 70mm.
Preferably, the thickness range of described upper cover plate is 20mm～30m, and the thickness range of described lower cover is 22mm～40mm.
The invention provides a kind of bolster for bogie truck, the center is provided with the cavity that is surrounded by two sidewalls, upper cover plate and lower covers, two described sidewalls all are provided with first through hole, are provided with second through hole at the horizontal opposite side of described cavity in the horizontal side of described cavity, so that described strut bar penetrates, passes through second through hole of described cavity and another described sidewall from first through hole of arbitrary described sidewall.
Adopt this structure, install when intersecting supporting mechanism in above-mentioned, can earlier first strut bar be penetrated through first through hole of the first side wall, through cavity, second through hole through the first side wall passes again; And then first through hole of second strut bar from the first side wall penetrated, through cavity, second through hole through the first side wall passes again.Like this, first strut bar and second strut bar have been realized arranged in a crossed manner at cavity, and can pass from the through hole on the sidewall and realize and being connected of bogie side frame.This shows, adopt the bolster of this structure, intersection support type bogie truck in can being suitable for.
The present invention also provides a kind of bogie truck, comprises two bogie side frames, is connected in two bolster between the described bogie side frame, and middle intersection strut bar; Described bolster adopts aforesaid structure, and described strut bar penetrates, passes through second through hole of described cavity and another sidewall from first through hole of a sidewall of described bolster.
Because above-mentioned bolster has as above technique effect, therefore, comprises that the bogie truck of this bolster also should have corresponding technique effect, does not repeat them here.
Description of drawings
Fig. 1 and Fig. 2 are respectively front view and the birds-eye view of three-major-items formula bogie truck;
Fig. 3 is the keystone configuration scheme drawing of middle cross-braced bogie;
Fig. 4 is the front view of bolster among Fig. 1;
Fig. 5 is that B-B among Fig. 4 is to cutaway view;
Fig. 6 is that A-A among Fig. 4 is to cutaway view;
Fig. 7 is that C-C among Fig. 4 is to cutaway view;
Fig. 8 is the front view of a kind of specific embodiment of bolster provided by the present invention;
Fig. 9 is that B-B among Fig. 8 is to cutaway view;
Figure 10 is that A-A among Fig. 8 is to cutaway view;
Figure 11 is that E-E among Figure 10 is to cutaway view;
Figure 12 is that C-C among Fig. 8 is to cutaway view;
Figure 13 is that F-F among Fig. 8 is to cutaway view.
Wherein, the Reference numeral among Fig. 1 to Fig. 7 and the corresponding relation between the component names are:
Bogie side frame 1; Bolster 2; Sidewall 21; Upper cover plate 22; Lower cover 23; Stud 221; Horizontal bar 222; Truck center plate 3; Secondary suspension system 4; Loading ability of bearing saddle 5; Wheel 6;
Reference numeral and the corresponding relation between the component names among Fig. 8 to Figure 13 are:
The specific embodiment
Core of the present invention is for providing a kind of bolster for bogie truck, this bolster by in the center, sidewall offers cavity and through hole respectively, two strut bars arranged in a crossed manner can be installed, and have bigger intensity, guarantees the bogie truck safe operation.In addition, another core of the present invention is for providing a kind of bogie truck that comprises above-mentioned bolster.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Need to prove, the noun of locality of Chu Xianing " laterally ", " vertically ", " vertical " all are at the track that bogie truck is installed herein, namely " laterally " refer among Fig. 3 up and down the direction of extending, extending about among Fig. 8, the direction that " vertically " extend about referring among Fig. 3, extend up and down among Fig. 9, " vertical " refers to the direction of extending up and down among Fig. 8; The appearance that should be appreciated that these nouns of locality is that benchmark is set up with the Figure of description, and their appearance should not influence protection scope of the present invention.
Please refer to Fig. 8 and Fig. 9, Fig. 8 is the front view of a kind of specific embodiment of bolster provided by the present invention; Fig. 9 is that B-B among Fig. 8 is to cutaway view.
In a kind of specific embodiment, as Fig. 8 and shown in Figure 9, the invention provides a kind of bolster for bogie truck, bogie truck has middle intersection supporting mechanism as shown in Figure 3, this bolster has two sidewalls, upper cover plate 12 and lower cover 13, center at bolster, two sidewalls 11, upper cover plate 12 and lower cover 13 surround cavity 14, two sidewalls 11 all are provided with first through hole 111 in a horizontal side of cavity 14, horizontal opposite side at cavity 14 is provided with second through hole 112, so that strut bar penetrates from first through hole 111 of arbitrary sidewall 11, second through hole 112 through cavity 14 and another sidewall 11 passes.
Adopt this structure, install when intersecting supporting mechanism in above-mentioned, can earlier first strut bar be penetrated through first through hole 111 of the first side wall, through cavity 14, second through hole 112 through second sidewall passes again; And then first through hole 111 of second strut bar from second sidewall penetrated, through cavity 14, second through hole 112 through the first side wall passes again.Like this, first strut bar and second strut bar have been realized arranged in a crossed manner at cavity 14, and can pass from the through hole on the sidewall 11 and realize and being connected of bogie side frame.This shows, adopt the bolster of this structure, intersection support type bogie truck in can being suitable for.
Need to prove that above-mentioned " center of bolster " refers to bolster about horizontal, vertical, vertical position centered by all.In addition, bolster provided by the present invention is not only applicable to intersect in above-mentioned the bogie truck of supporting construction, can also be applicable to that other need intersect the bogie truck that passes rod member because improving the bogie truck performance in the bolster abdominal cavity.
The concrete structure of above-mentioned cavity 14 can also further be set.
Please refer to Figure 10 and shown in Figure 12, Figure 10 is that A-A among Fig. 8 is to cutaway view; Figure 12 is that C-C among Fig. 8 is to cutaway view.
In the concrete scheme, in cavity 14, upper cover plate 12 is provided with that at least one stretches out, first stud 141 of horizontally set downwards.
Because bolster roof center is connected with the car body of railway truck by truck center plate, the load that bear the bolster center in the bogie truck operational process is bigger, and is therefore higher to rigidity and the requirement of strength of bolster center.Adopt said structure, can increase bolster at the strength and stiffness at cavity 14 places, avoid the strength at repeated alternation that weakens bolster that arranges of cavity 14, to guarantee the bogie truck stable operation.
Similarly in the scheme, as Figure 10 and shown in Figure 12, in cavity 14, lower cover 13 is provided with that at least one protrudes upward, second stud 142 of horizontally set.On the basis of above-mentioned first stud 141, second stud 142 can further strengthen rigidity and the intensity of bolster, guarantees the working stability of bolster.
Please in conjunction with reference Figure 10 and Figure 11, Figure 11 is that E-E among Figure 10 is to cutaway view.
In the another kind of specific embodiment, as shown in Figure 10 and Figure 11, also inwardly be provided with the 3rd stud 143, the three studs 143 that stretch out, vertically arrange in the above-mentioned cavity 14 and connect first stud 141, upper cover plate 12, sidewall 11, lower cover 13 and second stud 142.
Adopt this structure, vertical the 3rd stud 143 that arranges can be connected first stud 141, upper cover plate 12, sidewall 11, lower cover 13 and second stud 142 as a whole, has further strengthened the strength and stiffness at cavity 14 places.The noun of locality here " interior " refers in horizontal surface, by the direction of pointing to cavity 14 centers from all directions.
Special version be, the above-mentioned specific embodiment does not limit concrete quantity and the concrete width of first stud 141, second stud 142 and the 3rd stud 143, as shown in figure 10, can first stud 141, second stud 142 and the 3rd stud 143 be set respectively in vertical both sides of cavity 14 specifically, the stud of other numbers also can be set.The concrete width of these studs can be decided on the infall of first strut bar, second strut bar and the gap of cavity 14 inwalls.
The specific constructive form of the through hole of above-mentioned sidewall 11 can also further be set.
Please in conjunction with reference to figure 8 and Figure 13, Figure 13 is that F-F among Fig. 8 is to cutaway view.
In the another kind of specific embodiment, as Fig. 8 and shown in Figure 13, between above-mentioned two first through holes 111, be equipped with the 4th stud 113 that at least one connects upper cover plate 12 and lower cover 13 between two second through holes 112.
Adopt this structure, the 4th stud 113 of connecting through hole upper wall and lower wall can strengthen sidewall 11 at the strength and stiffness at first through hole 111, second through hole, 112 places, distance shortens between the top and bottom because distortion causes to avoid bolster to use back first through hole 111, second through hole 112 for a long time, perhaps cause the generation of wild effects such as first through hole 111 and second through hole, 112 inwall crackings, further guarantee the working stability of bogie truck.Similarly, the width W of the 4th stud 113 (Fig. 8) can be decided on the infall of first strut bar, second strut bar and the gap of cavity 14 inwalls.
Particularly, above-mentioned first through hole 111, second through hole 112 can be transverse distance greater than the slotted hole of vertical distance.
Because two strut bars of middle intersection supporting mechanism are elongate rod, with the process of bolster assembling in occupy horizontal space greater than vertical space, therefore, two through holes on the sidewall 11 are set to lateral length can guarantee that greater than the slotted hole of vertical length strut bar passes through smoothly, can not cause the weakening of intensity and intensity again because of the space waste, guarantee the bolster working stability.
In addition, as shown in Figure 8, above-mentioned first through hole 111 is 5mm～15mm with lateral clearance, second through hole 112 of strut bar with the lateral clearance scope of strut bar.Like this, can avoid first through hole 111, second through hole 112 and two strut bars to take place laterally to interfere, avoid because the two friction causes loss, perhaps because the performance of the anti-serpentine locomotion of frictional influence, thereby guarantee the working stability of bogie truck.Particularly, can be set to 10mm by this lateral clearance, certainly, can also it be set to other length.
Similarly in the scheme, the vertical gap of the vertical gap of above-mentioned first through hole, 111 inwalls and strut bar, second through hole, 112 inwalls and strut bar is greater than the maximum defluxion of truck bolster.Like this; even first strut bar or second strut bar produce amount of deflection after long-term work; first through hole 111, second through hole 112 still can not interfere with strut bar; avoid in the bogie truck operational process the two because long-term friction causes loss, two strut bars and bolster are all played a protective role.
In the another kind of specific embodiment, the distance H of the upper limb of the upper limb of above-mentioned first through hole 111, second through hole 112 and upper cover plate 12 end faces is all more than or equal to 70mm.
Like this, rigidity and the intensity that bigger thickness can strengthen bolster equally is set on through hole, so that it has strength at repeated alternation preferably, guarantees working stability.Particularly, can be set to 100mm by this lateral clearance H, certainly, can also it be set to other length.
In the another kind of specific embodiment, the thickness range of the upper cover plate 12 of above-mentioned bolster can be 20mm～30mm, and the thickness range of lower cover 13 can be 22mm～40mm.
By increasing the thickness of upper cover plate 12 and lower cover 13, also can further strengthen rigidity and the intensity of bolster, improve its strength at repeated alternation, guarantee the working stability of bolster.
In addition, the present invention also provides a kind of bogie truck, comprises two bogie side frames that be arranged in parallel, is connected in two bolster between the bogie side frame, and middle intersection supporting mechanism; Bolster adopts structure as above, and two strut bars of middle intersection supporting mechanism penetrate, pass through cavity 14 and another sidewall 11 from a sidewall 11 of bolster respectively.
Because above-mentioned bolster has as above technique effect, therefore, comprises that the bogie truck of this bolster also should have identical technique effect, does not repeat them here.
More than a kind of bogie truck provided by the present invention and bolster thereof are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (11)
1. bolster that is used for bogie truck intersects strut bar during described bogie truck is provided with; It is characterized in that, described bolster is provided with the cavity (14) that is surrounded by two sidewalls (11), upper cover plate (12) and lower cover (13) in the center, two described sidewalls (11) all are provided with first through hole (111), are provided with second through hole (112) at the horizontal opposite side of described cavity (14) in the horizontal side of described cavity (14), so that described strut bar penetrates, passes through second through hole (112) of described cavity (14) and another described sidewall (11) from first through hole (111) of arbitrary described sidewall (11).
2. the bolster for bogie truck according to claim 1 is characterized in that, in described cavity (14), described upper cover plate (12) is provided with that at least one stretches out, first stud of horizontally set (141) downwards.
3. the bolster for bogie truck according to claim 2 is characterized in that, in described cavity (14), described lower cover (13) is provided with that at least one protrudes upward, second stud of horizontally set (142).
4. the bolster for bogie truck according to claim 3, it is characterized in that, also inwardly be provided with the 3rd stud (143) that stretches out, vertically arranges in the described cavity (14), described the 3rd stud (143) connects described first stud (141), described upper cover plate (12), described sidewall (11), described lower cover (13) and described second stud (142).
5. according to each described bolster for bogie truck of claim 1-4, it is characterized in that, between two described first through holes (111), be provided with the 4th stud (113) that at least one connects described upper cover plate (12) and described lower cover between two described second through holes (112).
6. the bolster for bogie truck according to claim 5 is characterized in that, described first through hole (111), described second through hole (112) are transverse distance greater than the slotted hole of vertical distance.
7. the bolster for bogie truck according to claim 5 is characterized in that, described first through hole (111) is 5mm～15mm with lateral clearance, described second through hole (112) of described strut bar with the lateral clearance scope of described strut bar.
8. the bolster for bogie truck according to claim 7, it is characterized in that the vertical gap of the vertical gap of described first through hole (111) and described strut bar, described second through hole (112) and described strut bar is all greater than the maximum vertical amount of deflection of the bolster of described bogie truck.
9. the bolster for bogie truck according to claim 5, it is characterized in that the distance of the distance of the upper limb of described first through hole (111) and described upper cover plate (12) end face, the upper limb of described second through hole (112) and described upper cover plate (12) end face is all more than or equal to 70mm.
10. according to each described bolster for bogie truck of claim 1-4, it is characterized in that the thickness range of described upper cover plate (12) is 20mm～30mm, the thickness range of described lower cover (13) is 22mm～40mm.
11. a bogie truck comprises two bogie side frames, is connected in two bolster between the described bogie side frame, and middle intersection strut bar; It is characterized in that described bolster adopts as each described structure of claim 1-10, described strut bar penetrates, passes through second through hole (112) of described cavity (14) and another sidewall from first through hole (111) of a sidewall of described bolster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310108496XA CN103192841A (en) | 2013-03-29 | 2013-03-29 | Bogie and swing bolster thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310108496XA CN103192841A (en) | 2013-03-29 | 2013-03-29 | Bogie and swing bolster thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103192841A true CN103192841A (en) | 2013-07-10 |
Family
ID=48715704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310108496XA Pending CN103192841A (en) | 2013-03-29 | 2013-03-29 | Bogie and swing bolster thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103192841A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015078180A1 (en) * | 2013-11-27 | 2015-06-04 | 齐齐哈尔轨道交通装备有限责任公司大连研发中心 | Bolster, bolster vibration-damping assembly and bogie |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3482531A (en) * | 1967-08-03 | 1969-12-09 | Amsted Ind Inc | Reinforced railway truck bolster |
| US4196672A (en) * | 1977-02-07 | 1980-04-08 | Standard Car Truck Company | Reinforced bolster |
| US5111753A (en) * | 1990-12-21 | 1992-05-12 | Amsted Industries Incorporated | Light weight fatigue resistant railcar truck bolster |
| CN2910705Y (en) * | 2006-05-29 | 2007-06-13 | 中国北车集团齐齐哈尔铁路车辆(集团)有限责任公司 | Bogie of railway wagon |
| CN101700775A (en) * | 2009-11-27 | 2010-05-05 | 齐齐哈尔轨道交通装备有限责任公司 | Bogie for freight car and freight car |
| CN102602415A (en) * | 2012-03-23 | 2012-07-25 | 齐齐哈尔轨道交通装备有限责任公司 | Supporting device of connecting rod of bogie, bogie and truck |
-
2013
- 2013-03-29 CN CN201310108496XA patent/CN103192841A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3482531A (en) * | 1967-08-03 | 1969-12-09 | Amsted Ind Inc | Reinforced railway truck bolster |
| US4196672A (en) * | 1977-02-07 | 1980-04-08 | Standard Car Truck Company | Reinforced bolster |
| US5111753A (en) * | 1990-12-21 | 1992-05-12 | Amsted Industries Incorporated | Light weight fatigue resistant railcar truck bolster |
| CN2910705Y (en) * | 2006-05-29 | 2007-06-13 | 中国北车集团齐齐哈尔铁路车辆(集团)有限责任公司 | Bogie of railway wagon |
| CN101700775A (en) * | 2009-11-27 | 2010-05-05 | 齐齐哈尔轨道交通装备有限责任公司 | Bogie for freight car and freight car |
| CN102602415A (en) * | 2012-03-23 | 2012-07-25 | 齐齐哈尔轨道交通装备有限责任公司 | Supporting device of connecting rod of bogie, bogie and truck |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015078180A1 (en) * | 2013-11-27 | 2015-06-04 | 齐齐哈尔轨道交通装备有限责任公司大连研发中心 | Bolster, bolster vibration-damping assembly and bogie |
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Application publication date: 20130710 |