CN111994112B - Traction device of bogie - Google Patents
Traction device of bogie Download PDFInfo
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- CN111994112B CN111994112B CN202010821050.1A CN202010821050A CN111994112B CN 111994112 B CN111994112 B CN 111994112B CN 202010821050 A CN202010821050 A CN 202010821050A CN 111994112 B CN111994112 B CN 111994112B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/50—Other details
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Abstract
The invention relates to the technical field of railway vehicles, in particular to a traction device of a bogie. The traction device comprises two baffles which are oppositely arranged along the longitudinal direction, two side plates which are oppositely arranged along the transverse direction and an upper end plate which is arranged along the horizontal direction; the upper end plate is provided with a connecting structure for connecting a vehicle body; the baffle and the side plates are arranged along the vertical direction, and the height of each side plate is smaller than that of the baffle; one side plate is fixedly connected with one end parts of the two baffle plates, and the other side plate is fixedly connected with the other end parts of the two baffle plates; the bottom of the side plate is provided with a positioning groove matched with the beam of the framework in shape; the bottom surface of the upper end plate is fixedly connected with the top surfaces of the baffle plate and the side plates. The traction device can better transmit longitudinal impact while ensuring the energy transmission and the structural strength between the upper and lower vehicles, and can bear larger longitudinal impact load during collision.
Description
Technical Field
The application relates to the technical field of railway vehicles, in particular to a traction device of a bogie.
Background
The rail vehicle is an important traffic tie connecting cities, is gradually a main vehicle in the cities, and is also a main carrier for realizing goods transportation. The rail vehicle mainly comprises a vehicle body and a bogie arranged below the vehicle body, wherein the bogie is used for bearing the vehicle body and realizing walking and steering functions.
Conventional bogies consist primarily of a frame, wheel sets, traction devices, braking devices, damping devices, axle boxes, primary and secondary suspension devices. The frame is a main body structure of the bogie, and a general traction device is arranged at the center of the frame and used for realizing the limiting and energy transfer between the vehicle body and the frame. However, existing draft gears are not capable of withstanding large longitudinal shock loads.
Disclosure of Invention
The embodiment of the application provides a traction device of a bogie, which can better transmit longitudinal impact while ensuring the energy transmission and the structural strength between an upper car and a lower car and can bear larger longitudinal impact load during collision.
The embodiment of the application provides a traction device of a bogie, which comprises two baffles oppositely arranged along the longitudinal direction, two side plates oppositely arranged along the transverse direction and an upper end plate arranged along the horizontal direction;
the upper end plate is provided with a connecting structure for connecting a vehicle body;
the baffle and the side plates are arranged in the vertical direction, and the height of each side plate is smaller than that of the baffle; one side plate is fixedly connected to one end part of each of the two baffle plates, and the other side plate is fixedly connected to the other end part of each of the two baffle plates; the bottom of the side plate is provided with a positioning groove matched with the beam of the framework in shape;
the bottom surface of the upper end plate is fixedly connected with the top surface of the baffle and the top surface of the side plate.
Preferably, the bumper plate is fixedly installed at the bottom of the inner side face of each baffle, and the two bumper plates are arranged oppositely.
Preferably, the device also comprises transverse ribs and longitudinal ribs which are arranged between the two baffles in a criss-cross manner;
the top of the transverse rib plate is fixedly connected to the bottom surface of the upper end plate, and two end parts of the transverse rib plate are fixedly connected to the two side plates;
the top of the longitudinal rib plate is fixedly connected to the bottom surface of the upper end plate, and two end parts of the longitudinal rib plate are fixedly connected to the two baffle plates.
Preferably, the longitudinal rib plate is provided with arc-shaped grooves corresponding to the positioning grooves one to one, and the arc-shaped grooves are used for being matched with the cross beam in shape.
Preferably, the baffle plate structure further comprises reinforcing rib plates fixedly connected to the outer side faces of the baffle plates, and the tops of the reinforcing rib plates are fixedly connected to the bottom face of the upper end plate.
Preferably, the reinforcing rib plate is a triangular plate or a trapezoidal plate.
Preferably, the positioning groove and the arc-shaped groove are both semicircular grooves;
the bottom of the side plate is provided with two positioning grooves distributed along the arrangement direction of the two baffles.
Preferably, two end parts of the side plate are provided with folded edges, and the folded edges are fixedly connected to the outer side surface of the baffle plate.
Preferably, the thickness of the upper end plate is 40 mm-50 mm.
Preferably, the connecting structure is two rows of mounting holes symmetrically arranged along the longitudinal direction, and each row of mounting holes comprises a plurality of mounting holes uniformly distributed along the transverse direction.
Adopt the draw gear that provides in this application embodiment, have following beneficial effect:
the traction device comprises two baffle plates which are opposite along the longitudinal direction, two side plates which are opposite along the transverse direction and an upper end plate which is arranged along the horizontal direction, the bottom surface of the upper end plate is fixedly connected to the top parts of the baffle plates and the side plates, and a box body structure with a downward opening is formed by the upper end plate, the baffle plates and the side plates; in the working process, the positioning groove at the bottom of the side plate is buckled on a cross beam of the framework in a shape matching manner, and the baffle plate is arranged in parallel with the cross beam and is clamped on the outer side of the cross beam, so that the traction device is limited on the framework; above-mentioned draw gear adopts the box structure that is formed by upper end plate, baffle and curb plate, can strengthen draw gear longitudinal structural strength and rigidity through the box, consequently, compare with the draw gear of current center round pin structure, the draw gear of this application embodiment not only has simple structure's characteristics, but also can be when guaranteeing the energy transfer and the structural strength of getting on, getting off the bus, better transmission vertical impact to can bear great impact load when the collision.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic perspective view of a traction device according to an embodiment of the present disclosure;
FIG. 2 is a schematic perspective view of another angle of the draft gear of FIG. 1;
FIG. 3 is a schematic view of the assembly of the draft gear and frame provided in FIG. 1;
FIG. 4 is a schematic view of the draft gear and frame assembly of FIG. 3 at another angle;
fig. 5 is a perspective view schematically showing a bogie equipped with the traction apparatus provided in fig. 1.
Reference numerals:
1-a side beam; 2-a cross beam; 4-wheel pair; 6-secondary suspension device; 7-a traction device; 71-a baffle; 72-side plate; 73-upper end plate; 74-reinforcing plate; 75-crash pad; 76-transverse ribs; 77-longitudinal ribs; 731-mounting holes; 721-positioning grooves; 722-folding; 771-arc groove.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the present embodiment, the longitudinal direction is the travel direction of the rail vehicle, i.e., the arrangement direction of the two wheel pairs 4; the transverse direction is the width direction of the railway vehicle, namely the axial direction of an axle in a wheel pair 4 of the bogie or the length extension direction of a cross beam 2 of the framework; the vertical direction is the height direction of the rail vehicle.
The embodiment of the application provides a traction device 7 of a bogie, the specific structure of the traction device 7 can refer to fig. 1 and fig. 2, the specific structure of the bogie can refer to fig. 5, the bogie comprises a framework composed of two side beams 1 and two cross beams 2, a wheel pair 4 for supporting the framework and rotating along a track, the traction device 7 mounted on the cross beam 2 in a limiting way, and a secondary suspension device 6 mounted at the top of the side beam 1; the traction device 7 is used for connecting the vehicle body, and power transmission is carried out on the vehicle body through the traction device 7, so that the vehicle body moves along a track under the driving of the bogie; as shown in fig. 3 and 4, the traction device 7 is bridged over the two beams, the two beams are limited between the two baffles 71, and the side plate 72 is in shape fit with the two beams 2 through the positioning slot 721; a traction device mounting seat (not shown in the figure) can be fixedly arranged on the cross beam 2; the traction device mounting seat comprises two limiting plates (not shown in the figure) and a plurality of ribbed plates (not shown in the figure) fixedly connected between the limiting plates and the cross beam 2; the limiting plates are arranged in parallel with the beams 2, one limiting plate is fixedly connected to one side of each beam 2, the two limiting plates can be just accommodated between the two baffles 71 of the traction device 7, the longitudinal displacement of the traction device 7 is limited, and the traction device 7 is limited; the traction device 7 comprises two baffle plates 71 which are oppositely arranged along the longitudinal direction, two side plates 72 which are oppositely arranged along the transverse direction, and an upper end plate 73 which is arranged along the horizontal direction; the upper end plate 73 is provided with a connecting structure for connecting the vehicle body; the baffle 71 and the side plate 72 are both arranged along the vertical direction, and the height of the side plate 72 is smaller than that of the baffle 71; one side plate 72 is fixedly connected to one end portions of the two baffle plates 71, and the other side plate 72 is fixedly connected to the other end portions of the two baffle plates 71; the bottom of the side plate 72 is provided with a positioning slot 721 matched with the beam 2 of the framework in shape; the bottom surface of the upper end plate 73 is fixedly connected with the top surface of the baffle plate 71 and the top surface of the side plate 72. The traction device 7 is installed and connected with the vehicle body through the upper end plate 73, the connecting structure arranged on the upper end plate 73 can be two rows of installing holes 731 symmetrically arranged along the longitudinal direction, and each row of installing holes 731 comprises a plurality of installing holes 731 uniformly distributed along the transverse direction; as shown in the structure of fig. 1 and 2, two rows of mounting holes 731 are formed in the upper end plate 73, the mounting holes 731 are used for penetrating bolts, the arrangement direction of each row of mounting holes 731 is consistent with the extending direction of the cross beam 2, and the arrangement direction of the two rows of mounting holes 731 is consistent with the arrangement direction of the two wheel pairs 4; the actual number of the installation holes 731 may be determined according to actual conditions.
The traction device 7 comprises two baffle plates 71 opposite to each other along the longitudinal direction, two side plates 72 opposite to each other along the transverse direction and an upper end plate 73 arranged along the horizontal direction, the bottom surface of the upper end plate 73 is fixedly connected to the tops of the baffle plates 71 and the side plates 72, and a box body structure with a downward opening is formed by the upper end plate 73, the baffle plates 71 and the side plates 72; in the working process, the positioning slot 721 at the bottom of the side plate 72 is buckled on the beam 2 of the framework in a shape matching manner, the baffle plate 71 is arranged in parallel with the beam 2 and is clamped at the outer side of the beam 2, so that the traction device 7 is limited on the framework; the traction device 7 adopts a box body structure formed by the upper end plate 73, the baffle plate 71 and the side plate 72, and the structural strength and rigidity of the traction device 7 in the longitudinal direction can be enhanced through the box body, so that compared with the traction device 7 with the existing center pin structure, the traction device 7 of the embodiment of the application not only has the characteristic of simple structure, but also can better transmit longitudinal impact while ensuring the energy transmission and the structural strength between an upper vehicle and a lower vehicle, and can bear larger impact load during collision.
In a specific embodiment, as shown in the structure of fig. 1 and 2, the traction device 7 further includes a crash pad 75 fixedly mounted at the bottom of the inner side of each baffle 71, and the two crash pads 75 are disposed opposite to each other. The baffles 71 are arranged in the vertical direction, the outer side surfaces of the baffles 71 are the surfaces of the baffles 71 facing the outer side of the traction device 7, the inner side surfaces of the baffles 71 facing the inner side of the traction device 7, that is, the opposite surfaces of the two baffles 71 are the inner side surfaces of the baffles 71, and the opposite surfaces of the two baffles 71 are the outer side surfaces of the baffles 71. The crash pad 75 may be a wear plate made of a wear resistant material.
Because the crash pad 75 is arranged at the bottom of the inner side surface of the baffle 71, when the baffle 71 contacts or collides with the cross beam 2, the crash pad 75 is pressed between the baffle 71 and the cross beam 2, thereby protecting the cross beam 2 and the baffle 71.
In order to further improve the structural strength and rigidity of the traction device 7, as shown in the structure of fig. 2, the traction device 7 further comprises a transverse rib 76 and a longitudinal rib 77 which are arranged between the two baffles 71 in a criss-cross manner; the top of the transverse rib 76 is fixedly connected to the bottom surface of the upper end plate 73, and the two end parts are fixedly connected to the two side plates 72; the top of the longitudinal rib 77 is fixedly connected to the bottom surface of the upper end plate 73, and both ends are fixedly connected to the two blocking plates 71. In the draft gear 7 of fig. 2, only one lateral rib 76 and one longitudinal rib 77 are provided, the lateral rib 76 being disposed in parallel with the two flaps 71 and being located at the middle of the two flaps 71; the longitudinal rib 77 is arranged parallel to the two side plates 72 and is located in the middle of the two side plates 72; in the present embodiment, only one transverse rib 76 and one longitudinal rib 77 that intersect vertically and horizontally are provided as an example for description, but in actual use, a plurality of transverse ribs 76 and longitudinal ribs 77 that intersect vertically and horizontally may be provided.
Because the longitudinal rib 77 is fixedly connected between the two baffle plates 71, the transverse rib 76 is fixedly connected between the two side plates 72, and meanwhile, the transverse rib 76 and the top of the longitudinal rib 77 are fixedly connected with the upper end plate 73, the structural strength and rigidity of the traction device 7 can be further enhanced through the longitudinal rib 77 and the transverse rib 76, so that the capability of the traction device 7 for bearing longitudinal impact load and transverse impact load is further improved.
In order to enhance the limit connection between the towing attachment 7 and the frame, as shown in the structure of fig. 2, the longitudinal rib 77 is provided with arc grooves 771 corresponding to the positioning slots 721 one by one, and the arc grooves 771 are used for matching with the cross beam 2 in shape. As shown in the structure of fig. 2, the curb plate 72 is provided with two constant head tanks 721 that set up along the array direction interval of baffle 71, every constant head tank 721 corresponds a crossbeam 2, constant head tank 721 can the joint on crossbeam 2, be provided with a longitudinal rib 77 between two curb plates 72, also can be provided with two arc recess 771 on the longitudinal rib 77, the quantity of arc recess 771, array direction and the quantity that sets up position and constant head tank 721, array direction and set up the position and all unanimous, every arc recess 771 corresponds a crossbeam 2, when installing draw gear 7 on crossbeam 2, every constant head tank 721 joint is on crossbeam 2, arc recess 771 can the joint on crossbeam 2, also can have the interval between the crossbeam 2. The positioning slot 721 and the arc-shaped groove 771 can both be semicircular grooves; the bottom of the side plate 72 is provided with two positioning grooves 721 distributed along the arrangement direction of the two baffles 71. When the appearance of crossbeam 2 is cylinder or pipe, constant head tank 721 and arc recess 771 all can be the semicircle groove to the semicircle groove can the joint just on the upper portion lateral surface of crossbeam 2, make closely cooperate between crossbeam 2 and curb plate 72 and the vertical floor 77, simultaneously, curb plate 72 is provided with two constant head tanks 721 with two crossbeam 2 cooperations, corresponds with constant head tank 721 and is provided with two arc recesses 771. The number of the positioning grooves 721 and the arc grooves 771 is matched with the number of the beams 2 of the frame, and is not limited to two positioning grooves 721 arranged in fig. 2, and when the number of the beams 2 is 1, 3 or more, the number of the positioning grooves 721 is correspondingly 1, 3 or more.
Because vertical floor 77 is provided with the arc recess 771 with constant head tank 721 one-to-one, can carry out the form fit through arc recess 771 with the crossbeam 2 of framework for spacing cooperation between draw gear 7 and the crossbeam 2 is more stable, reliable, simultaneously, can also avoid vertical floor 77 to appear stress concentration's phenomenon through arc recess 771, is favorable to improving the structural strength and the life of vertical floor 77.
As shown in fig. 1 and 2, the traction device 7 further includes a rib 74 fixedly connected to an outer side surface of each baffle 71, and a top of the rib 74 is fixedly connected to a bottom surface of the upper end plate 73. The stiffener plates 74 are triangular plates or trapezoidal plates. As shown in fig. 1 and fig. 5, two reinforcing rib plates 74 are provided on the outer side surface of the baffle 71, and in the embodiment of the present invention, only two reinforcing rib plates 74 are provided on the outer side surface of the baffle 71 as an example, and in the actual use process, the number and the positions of the reinforcing rib plates 74 may be determined according to the actual situation.
Through two reinforcing rib plates 74 arranged on the outer side face of the baffle plate 71, the baffle plate 71 and the upper end plate 73 are fixedly connected together through the reinforcing rib plates 74, the connection strength between the baffle plate 71 and the upper end plate 73 can be improved through the reinforcing rib plates 74, meanwhile, the reinforcing rib plates 74 are arranged on the outer side face of the baffle plate 71, the structural strength and the rigidity of the traction device 7 can be improved, and therefore the capability of the traction device 7 for bearing longitudinal impact load is improved.
As shown in fig. 1 and 2, the side plates 72 are provided at both ends thereof with flanges 722, and the flanges 722 are fixedly connected to the outer side surfaces of the baffles 71. The end parts of the side plates 72 facing the two baffles 71 are provided with folded edges 722, the folded edges 722 are bent towards the inner sides of the traction devices 7, the folded edges 722 formed by the end parts of the two side plates 72 are arranged oppositely, the folded edges 722 can be right-angle folded edges, the side plates 72 are coated on the outer side faces of the end parts of the baffles 71 through the folded edges 722 and are connected with the baffles 71 in a welded mode through the folded edges 722, so that the connection area between the side plates 72 and the baffles 71 is increased, the connection strength between the side plates 72 and the baffles 71 is increased, the longitudinal structural strength of the traction devices 7 can be increased, and the capability of bearing longitudinal impact loads of the traction devices 7 is improved.
On the basis of the various embodiments described above, the thickness of the upper end plate 73 is 40mm to 50mm, such as: 40mm, 45mm, 50 mm.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. The traction device of the bogie is characterized by comprising two baffle plates which are oppositely arranged along the longitudinal direction, two side plates which are oppositely arranged along the transverse direction and an upper end plate which is arranged along the horizontal direction;
the upper end plate is provided with a connecting structure for connecting a vehicle body;
the baffle and the side plates are arranged in the vertical direction, and the height of each side plate is smaller than that of the baffle; one side plate is fixedly connected to one end part of each of the two baffle plates, and the other side plate is fixedly connected to the other end part of each of the two baffle plates; the bottom of the side plate is provided with a positioning groove matched with the beam of the framework in shape;
the bottom surface of the upper end plate is fixedly connected with the top surfaces of the baffle plate and the side plates;
the anti-collision device also comprises anti-collision backing plates fixedly arranged at the bottoms of the inner side surfaces of the baffles, and the two anti-collision backing plates are arranged oppositely; the anti-collision base plate is used for being in contact with the side face of the cross beam.
2. The draft gear according to claim 1, further comprising transverse ribs and longitudinal ribs disposed criss-cross between said two said baffles;
the top of the transverse rib plate is fixedly connected to the bottom surface of the upper end plate, and two end parts of the transverse rib plate are fixedly connected to the two side plates;
the top of the longitudinal rib plate is fixedly connected to the bottom surface of the upper end plate, and two end parts of the longitudinal rib plate are fixedly connected to the two baffle plates.
3. The draft gear according to claim 2, wherein said longitudinal ribs are provided with arcuate recesses corresponding one-to-one with said detents, said arcuate recesses being adapted to form fit with said cross member.
4. The draft gear according to claim 3, further comprising a gusset fixedly attached to an outer side of each of said shrouds, a top of said gusset being fixedly attached to a bottom surface of said upper end plate.
5. The towing attachment in accordance with claim 4 wherein the stiffener plates are triangular or trapezoidal plates.
6. The draft gear according to claim 3, wherein said locating slot and said arcuate groove are each a semi-circular slot;
the bottom of the side plate is provided with two positioning grooves distributed along the arrangement direction of the two baffles.
7. The towing attachment in accordance with claim 1 wherein the side plates are each provided with a hem at each end, the hems being fixedly attached to the outer side of the apron.
8. The draft gear according to claim 1, wherein said upper end plate has a thickness of 40mm to 50 mm.
9. The towing attachment in accordance with any one of claims 1 to 8 wherein the attachment structure is provided in two rows of mounting holes symmetrically arranged in the longitudinal direction, each row of mounting holes comprising a plurality of mounting holes evenly distributed in the transverse direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010821050.1A CN111994112B (en) | 2020-08-14 | 2020-08-14 | Traction device of bogie |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010821050.1A CN111994112B (en) | 2020-08-14 | 2020-08-14 | Traction device of bogie |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111994112A CN111994112A (en) | 2020-11-27 |
| CN111994112B true CN111994112B (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010821050.1A Active CN111994112B (en) | 2020-08-14 | 2020-08-14 | Traction device of bogie |
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| CN (1) | CN111994112B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB745536A (en) * | 1953-02-20 | 1956-02-29 | English Electric Co Ltd | Improvements relating to bogies for rail vehicles |
| JP2010285071A (en) * | 2009-06-11 | 2010-12-24 | Tokyu Car Corp | Truck for railway vehicle |
| KR101083512B1 (en) * | 2009-04-16 | 2011-11-16 | 장남인 | Connecting device of railway truck |
| CN102407860A (en) * | 2011-09-30 | 2012-04-11 | 南车株洲电力机车有限公司 | Articulated bogie traction device |
| CN204506906U (en) * | 2015-01-06 | 2015-07-29 | 南车株洲电力机车有限公司 | A kind of motor train unit bogie draw gear |
| CN109591841A (en) * | 2018-11-23 | 2019-04-09 | 中车唐山机车车辆有限公司 | Municipal rail train bogie |
| CN110143213A (en) * | 2019-06-21 | 2019-08-20 | 株洲时代电子技术有限公司 | A kind of Draft gear of bogie and its application |
-
2020
- 2020-08-14 CN CN202010821050.1A patent/CN111994112B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB745536A (en) * | 1953-02-20 | 1956-02-29 | English Electric Co Ltd | Improvements relating to bogies for rail vehicles |
| KR101083512B1 (en) * | 2009-04-16 | 2011-11-16 | 장남인 | Connecting device of railway truck |
| JP2010285071A (en) * | 2009-06-11 | 2010-12-24 | Tokyu Car Corp | Truck for railway vehicle |
| CN102407860A (en) * | 2011-09-30 | 2012-04-11 | 南车株洲电力机车有限公司 | Articulated bogie traction device |
| CN204506906U (en) * | 2015-01-06 | 2015-07-29 | 南车株洲电力机车有限公司 | A kind of motor train unit bogie draw gear |
| CN109591841A (en) * | 2018-11-23 | 2019-04-09 | 中车唐山机车车辆有限公司 | Municipal rail train bogie |
| CN110143213A (en) * | 2019-06-21 | 2019-08-20 | 株洲时代电子技术有限公司 | A kind of Draft gear of bogie and its application |
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|---|---|
| CN111994112A (en) | 2020-11-27 |
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