• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    bogie for rail car and rail car. a rail car bogie and a rail car are provided. the bogie includes wheel sets, side frames provided with triangular holes, a crossmember provided with a pre-set hole in its body, and crossbars. cavities are formed in the sideframes, symmetrical around the center of the sideframes, and located below the triangular holes. a connecting seat is provided in each of the cavities, and provided with a vertical mounting hole in a middle portion of the connecting seat. the crisscross bars are elastically connected to the connector seats through the mounting holes. in the rail car bogie and the rail car, the resistance of the bogie is increased.
    公开号:BR112013002437B1
    申请号:R112013002437-2
    申请日:2012-08-29
    公开日:2021-08-24
    发明作者:Zhenming Liu；Shihui Duan
    申请人:Qiqihar Railway Rolling Stock Co., Ltd；
    IPC主号:
    专利说明:

    This application claims the priority benefit of Chinese Patent Application No. 201110296326.X entitled “Bogie for Rail Vehicle and RAIL VEHICLE” and filed with the Intellectual Property Office on September 27, 2011, which is incorporated herein by reference in its entirety. FIELD OF THE INVENTION
    The present invention relates to rail car structure technology, and particularly to a rail car bogie and a rail car. TECHNICAL STATUS
    A rail car used as a wheel-rail means of transport generally includes a car body, a bogie and braking equipment. The bogie serves to support the car body, to guide the wagon to move along rails, and support various loads coming from the car body and rails. The most common bogie for the rail car includes a cross member, two side frames, two sets of wheels, a spring vibration damper and braking equipment.
    In general, an increase in the wagon load capacity is basically achieved in two ways: one is to increase the axle load; and the other is to decrease the tare. Currently, due to the limitation of rails and bridges, axle load has been substantially increased to the limit, and it is difficult to increase it any further. Therefore, the effective carrying capacity is generally increased by decreasing the tare, thereby increasing the total carrying capacity.
    However, the bogie has a low anti-diamond stiffness and a low critical speed. There are many improved solutions to the disadvantages of such a bogie. An improved bogie is implemented by additionally providing elastic crisscross bars between the side frames, thereby increasing the anti-slip capability between the two side frames and the anti-diamond stiffness of the bogie. Currently, in actual application, the criss-cross bars may be arranged below the lane to form a lower criss-cross bogie, or they may be arranged to pass through the lane to form a central criss-cross bogie. The central crossbogie bogie is widely used due to its good safety performance and little influence on the braking equipment. Chinese Patent ZL 200620112243.5 (Publication No. CN2910705Y) discloses a bogie for railway wagon. As shown in figs. 1 to 3, this bogie is a central criss-cross bogie including wheel sets 1, side frames 2, a cross member 3 and a criss-cross device. The crisscross bars 4 are crossed in an "X" and pass through a predefined hole in the crossmember 3. The two ends of each of the crisscross bars 4 are elastically connected to the two side frames 2, so as to form an interlocking mechanism. four bars. The two ends of each of the side frames 2 are supported on the wheel assemblies 1 by rubber for axle housing and bearing adapter. The anti-diamond stiffness of the bogie is improved by providing a pair of crisscross bars 4 between the two side frames 2, thus improving the wagon's dynamic performance.
    The two criss-cross bars 4 of the central criss-cross bogie pass through the predefined hole of the crossmember 3. The two ends of each of the criss-cross bars 4 are elastically connected to the support seats 5 on the side frames 2 respectively.
    As shown in figs. 1 and 3, in order to enable the crisscross bars 4 to be connected to the side frames 2, a support seat 5 is welded below each triangular hole 6 outside the side frame 2. This support seat 5 includes a connecting pin 51 , a seat plate 52 and a reinforcement plate 53. The crisscross bars 4 pass through the triangular hole 6, mounted on the connecting stud 51, and are then secured with a locknut, thus being elastically connected to the seat of support 5. In the support seat above, the connections between the connecting pin 51 and the seat plate 52, between the seat plate 52 and the reinforcing plate 53, and between the support seat 5 and the side frame 2 are obtained by welding. A structure like this has the following drawbacks: (1) Low structural strength:
    Due to welding, the fatigue strength of a weld bead is itself lower than that of the metal body. Furthermore, the space for mounting the support seat 5 is limited, resulting in limiting the length of the seat plate 52 and the height of the gusset plate 53. As a result, the structural strength between the support seat 5 and the side frame 2 is smaller. (2) Large structural pre-tension:
    Connections between several members are achieved by welding, so that there are many weld beads being compressed and crossed, causing a large structural pre-stress. In use, an external force is added to the pre-stress, leading to greater local strain. (3) Unstable bogie performance:
    Due to the welding operation, the quality of the weld beads cannot be easily assured, and the connecting bolt 51 cannot be positioned accurately. Thus, after the crisscross bars 4 are assembled, the two side structures 2 are not in a desired rectangular shape, i.e. the bogie is not positioned correctly, which is prone to cause non-uniform wear of wheels of the same bogie. (4) Low strength of side structure:
    Due to the fact that each support seat 5 is arranged outside the side frame 2, the crisscross bars 4 need to pass through each triangular hole 6 in the side frame 2. Therefore, the lower arch radius of each triangular hole 6 cannot be designed to be very small, so as to avoid interference with the crisscross bars 4. Therefore, the strength of the side frames 2 is increased. (5) Low bogie anti-diamond stiffness:
    Due to the fact that the support seats 5 are arranged outside the side frames 2, the crisscross bars 4 are relatively long, thus reducing the critical anti-pressure destabilizing force of the crisscross bars 4. Therefore, the anti-diamond stiffness of the bogie is indirectly decreased . (6) Large occupied space:
    Due to the presence of the support seats 5, the overall width of the bogie is increased. Bogie design becomes more difficult for some wagons with a narrower gauge. (7) Great assembly difficulty:
    When the crisscross bars 4 are assembled, it is necessary to ensure the distance between the crisscross bars 4 and the bottom face of the connecting bolt 51, and to ensure a certain moment of force generated from the locknut above the crisscross bars 4, which is difficult. As a result, the assembly difficulty is great. (8) Inconvenient maintenance:
    Due to the fact that the connecting pin 51 is welded onto the seat plate 52 and the seat plate 52 is welded onto the side frame 2, it is inconvenient to replace the connecting pin 51 when the connecting pin 51 is worn or its thread is damaged. SUMMARY OF THE INVENTION
    In view of the drawbacks of the prior art, the present invention provides a rail car bogie having improved structural strength and a rail car.
    In one aspect of the present invention, a rail car bogie is provided which includes wheel assemblies, side frames provided with triangular holes, a cross member provided with a predefined hole in its body, and crisscross bars.
    Cavities are formed in the sideframes, symmetrical around the center of the sideframes, and located below the triangular holes. A connection seat is provided in each of the cavities, and provided with a vertical mounting hole in a middle portion of the connection seat. The crisscross bars are elastically connected to the respective connector seats through the corresponding mounting holes.
    In another aspect of the present invention, a rail car is also provided, including a car chassis and a bogie connected to the car chassis. The bogie is a bogie for a railway wagon according to the invention.
    In another aspect of the present invention, a rail vehicle bogie is additionally provided, including wheel sets, side frames provided with through holes, the cross member provided with a predefined hole, and crisscross bars.
    Cavities are formed in the lateral structures. A connection seat is provided in each of the cavities, and provided with a mounting hole. The crisscross bars are connected to the respective connector seats through the corresponding mounting holes.
    In the rail car bogie and the rail car according to the present invention, the strength of the bogie is increased; the anti-diamond stiffness of the bogie is improved; and they are convenient to assemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS
    Fig. 1 is a schematic structural view of a prior art rail car bogie.
    Fig. 2 is a structural top view of the prior art rail car bogie.
    Fig. 3 is a side view of the rail car bogie of fig. two.
    Fig. 4 is a structural front view of a bogie for a rail car in accordance with one embodiment of the present invention.
    Fig. 5 is a top view of the rail car bogie of fig. 4.
    Fig. 6 is an enlarged partially sectional view of a bogie for a rail car in accordance with an embodiment of the present invention.
    Fig. 7 is a schematic view of a cavity in a bogie for a rail car according to one embodiment of the present invention.
    Fig. 8 is a partially sectional exploded view of a bogie for a rail car in accordance with an embodiment of the present invention.Reference number in the drawings: 1 -wheel assembly2-side frame3-beam4-crossbarδ-support seat51-connection pin52 -seat plate 53-reinforcement plate6-triangular hole7-cavity8-connecting seat81 -mounting hole9-positioning pin10-lock nut11-elastic bushing DETAILED DESCRIPTION OF THE INVENTION
    In order to make the objects, technical solutions and advantages of the present invention more evident, embodiments of the present invention will be described clearly and completely, together with the accompanying drawings below. Obviously, the described embodiments consist of a part and not all of the embodiments of the present invention.
    Fig. 4 is a structural front view of a bogie for a rail car in accordance with an embodiment of the present invention; fig. 5 is a top view of the rail car bogie of fig. 4; fig. 6 is a partially enlarged view of a bogie for a rail car in accordance with an embodiment of the present invention; and fig. 7 is a schematic view of a cavity in a bogie for a rail car according to one embodiment of the present invention. A rail car bogie is provided in one embodiment of the present invention, which includes wheel sets 1, side frames 2 provided with triangular holes 6, a cross member 3 provided with a predefined hole in its body, and crossbars 4. Cavities 7 are formed within the respective sideframes 2, and are symmetrical about the center of the sideframes 2. As shown in Figs. 4 to 7, cavity 7 is located below triangular hole 6; a connecting seat 8 is provided in cavity 7; a vertical mounting hole 81 is provided in the middle portion of the connecting seat 8; the crossbar 4 is elastically connected to the connecting seat 8 through the mounting hole 81.
    Comparison is made between the present invention and the prior art. As shown in figs. 1 and 3, of the prior art, since there is limited space in the support seat 5, dimensions such as the length of a seat plate 52 and the height of a gusset plate 53 cannot be too large, of so that the structural strength between the support seat 5 and the side frame 2 is relatively low. The railway wagon bogie according to the embodiment of the invention has no welded structure, and there is no need to consider the effect of welding materials on stressed components, so that the railway wagon bogie can be constructed of materials with a higher strength. high, thereby increasing the strength of the bogie. Furthermore, in the bogie for railway wagon according to the embodiment of the invention, a hole is drilled or countersunk only in the connecting seat 8 provided in the cavity 7 of the side frame 2, and its dimension and mounting position thus can be easily secured . Therefore, the position of the crisscross device is precise, and the two side frames 2 can be in the desired rectangular shape. That is, the bogie is accurately held in place to prevent uneven wear of wheels on the same bogie. Furthermore, compared to the prior art, where the support seat 5 is provided outside the side frame 2, in the present invention, the connecting seat 8 is provided in the cavity 7 formed inside the side frame 2, so that the bar crisscross 4 has a shorter length and thus has an increased anti-pressure destabilizing critical force, thereby increasing the anti-diamond stiffness of the bogie.
    As shown in figs. 6 and 7, the connecting seat 8 is provided in the cavity 7 below the triangular hole 6 of the side frame 2. Preferably, the connecting seat 8 and the side frame 2 can be integrally formed by casting, thereby overcoming weakness of prior art strength due to the fact that the components are connected by welding.
    The specific shape of connection seat 8 is not limited here. For example, the connecting seat 8 can be configured in a hollow cylindrical shape, and the circular hole in the middle portion of the connecting seat 8 serves as the mounting hole 81. Specifically, the connecting seat 8 is disposed in the cavity 7. The top of the connecting seat 8 and the side frame 2 are formed in one piece by casting. The bottom of the connecting seat 8 may be of a suspended cylindrical structure, and may extend outwardly from the bottom of the cavity 7 to receive a positioning piece. In current machining process, a hole having a diameter smaller than that of the mounting hole 81 can be precast, and then finished by drilling or countersinking, in order to achieve the desired dimensional accuracy and surface finish.
    Fig. 8 is an exploded partially sectional view of a bogie for a rail car in accordance with an embodiment of the present invention. Based on the above embodiments, it is preferable that the bogie is provided with a positioning pin 9. One end of the positioning pin 9 is provided with a step that meets the bottom face of the mounting hole 81, and the other end of the positioning pin 9 is provided with a thread which fits into a locknut 10 so that the crossbars 4 are pressed against the side frame 2. The prior art connecting pin is replaced by the positioning pin 9. Positioning pin 9 is worn or its thread is damaged, it is convenient to carry out disassembly and replacement.
    Furthermore, each end of the crisscross bar 4 is provided with a positioning hole. An elastic bushing 11 with an internal hole is provided inside the positioning hole. The inner hole of the elastic bushing 11 is fitted to the positioning pin 9.
    In an actual application, the top and bottom surfaces of the connecting seat 8 are smooth surfaces. The crisscross bar 4 is placed on the upper surface of the connecting seat 8. The elastic bush 11 is disposed within each positioning hole of the ends of the crisscross bar 4. The positioning pin 9 passes through the mounting hole 81 and the hole of the crisscross bar 4. elastic bushing on the crisscross bar 4 from bottom to top. The locknut 10 is mounted to the threaded end of the positioning pin 9, thus connecting the crisscross bar 4 with the elastic bush 11. The elastic bush 11 functions to create a certain elasticity between the crisscross bar 4 and the side frame 2 of so as to alleviate an impact force.
    It is important to appreciate that if the provided triangular hole 6 is relatively large, the positioning pin 9 can pass through the mounting hole 81 from the top to the bottom, and the locknut 10 can be disposed at the lower end of the positioning pin. 9 during specific assembly. For the above structure, the positioning pin 9 will not be lost, even in the event of the nut being lost, thereby ensuring that the crisscross device will not fail.
    A rail car is also provided in an embodiment of the present invention which includes a car chassis and a bogie connected to the car chassis. The bogie is the rail car bogie according to any one of the embodiments of the present invention.
    For the rail car bogie and the rail car according to embodiments of the present invention, the connecting seat is provided in the cavity of the side frame and is elastically connected to the crossbar, which can overcome various prior art defects due to welding. , shortening the length of the crisscross bar, and increasing the structural strength and anti-diamond stiffness of the bogie.
    In another aspect of the present invention, a rail vehicle bogie is provided, including wheel sets 1, side frames 2 provided with through holes 6, a cross member 3 provided with a preset hole, and crisscross bars 4. As shown in Figs. 6 and 7, a cavity 7 is formed within the side frame 2, and is defined by the outer contour of the side frame 2. A connecting seat 8 is provided in the cavity 7. In the example shown in fig. 6, the connecting seat 8 is located below the through hole 6. However, it is important to understand that the connecting seat 8 can be located in any suitable position in the cavity 7, provided the crossbar 4 can be connected to the frame. side 2. A mounting hole can be provided in the connecting seat 8, and the crossbar can be connected to the connecting seat 8 through the mounting hole and thus connected to the side frame 2. Alternatively, connecting pieces well known in the art can also be provided on the connecting seat 8, so as to connect the crossbar 4 to the side frame 2. Of course, the rail vehicle bogie in the aspect of the present invention may incorporate some of the above embodiments or features for the rail car bogie, which will not be described in detail.
    It is important to note that the above embodiments only illustrate the technical solutions of the invention in an exemplary form, and are not intended to limit the present invention. Thus, it is important that it be appreciated by those skilled in the art that many improvements and modifications can be made to the invention without departing from the scope of the present invention, which is defined by the appended claims.
    权利要求:
    Claims (8)
    [0001]
    1. Rail vehicle bogie, comprising wheel sets, side frames provided with through holes, a cross member provided with a predefined hole, and crisscross bars, characterized in that cavities are formed in the side frames, a connecting seat is provided in each of the cavities, and provided with a mounting hole, and the crisscross bars are connected to the respective connector seats through the corresponding mounting holes, wherein each of the through holes is of an approximately triangular shape.
    [0002]
    A bogie for a railway vehicle according to claim 1, characterized in that each of the cavities is symmetrical with respect to a center line of the corresponding side frame.
    [0003]
    Rail vehicle bogie according to claim 1, characterized in that the connecting seats are arranged in the respective cavities and below the corresponding through holes.
    [0004]
    4. Bogie for railway vehicle according to claim 1, characterized in that the connecting seats and the respective lateral structures are formed integrally by casting.
    [0005]
    Rail vehicle bogie according to claim 1 or 4, characterized in that the bogie is provided with positioning pins, one end of each of the positioning pins is provided with a step configured to meet a bottom face of the corresponding mounting hole, the other end of each of the positioning pins is provided with a thread configured to engage a locknut to secure the crossbar to the side frame.
    [0006]
    A rail vehicle bogie according to claim 5, characterized in that two ends of each of the crisscross bars are each provided with a positioning hole, an elastic bushing with an internal hole is provided in the positioning hole, and the hole inner part of the elastic bushing be fitted to the positioning pin.
    [0007]
    A rail vehicle bogie according to claim 1, characterized in that each of the connecting seats is configured to be in the form of a hollow cylinder, and a central circular hole of the cylinder is configured as the mounting hole.
    [0008]
    8. Rail vehicle bogie according to claim 2, characterized in that each of the connecting seats is formed with a precast hole by casting, a diameter of the precast hole is smaller than that of the mounting hole, and the mounting hole be formed by additionally machining the precast hole.
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112013002437B1|2021-08-24|BOGIE FOR RAILWAY WAGON AND RAILWAY WAGON
    CN101700775B|2011-06-08|Bogie for freight car and freight car
    CN103523037B|2016-09-07|Rail vehicle truck
    BRPI0809554A2|2014-09-16|FRONT AND REAR ARM SUSPENSIONS WITH A FULLY INTEGRATED ARM
    BRMU8602152Y1|2016-05-03|trick of a railroad wagon
    BRPI0900883A2|2010-01-26|side bracket for use on a rail car trick
    CN203793356U|2014-08-27|Welded structure framework for steering of wagon
    RU160800U1|2016-04-10|TROLLEY AND FREIGHT TRAIN IN WHICH IT IS USED
    CN202728252U|2013-02-13|Bogie and bearing adapter component and side frame of bogie
    AU2013362665B2|2015-08-27|Railway freight car bogie and railway freight car
    CN201544977U|2010-08-11|Elastically positioning three-axle bogie for wagon axle box
    BRPI0621058A2|2011-11-29|chassis for a driver trolley
    CN102991524B|2015-07-08|Bogie and side frame thereof
    BR102016024500A2|2017-07-18|BEARING ASSEMBLY SIDE
    CA2804799C|2016-01-19|Railway wagon bogie and railway wagon
    CN103786740A|2014-05-14|Railway vehicle bogie
    CN203958163U|2014-11-26|A kind of bogies for railway vehicles
    NZ605971B2|2015-05-28|Railway wagon bogie and railway wagon
    CN210337479U|2020-04-17|Independent installation module of passenger car suspension
    CN210116508U|2020-02-28|Wedge type combined shock absorber and railway wagon bogie
    CN209921324U|2020-01-10|Rail vehicle and axle and bridge assembly thereof
    CN112208567A|2021-01-12|Wedge type combined shock absorber and railway wagon bogie
    CN112519821A|2021-03-19|Bogie cabin for railway vehicle and bogie system
    US3141421A|1964-07-21|Lateral motion freight car truck
    CN112519820A|2021-03-19|Bogie system of railway vehicle and railway vehicle
    同族专利:
    公开号 | 公开日
    WO2013044710A1|2013-04-04|
    TW201318909A|2013-05-16|
    AU2012268863A1|2013-04-11|
    AU2012268863C1|2015-07-09|
    EA201390041A1|2013-07-30|
    BR112013002437A2|2013-04-04|
    AR088005A1|2014-04-30|
    NZ605971A|2015-02-27|
    AU2012268863B2|2014-02-20|
    MX2013000652A|2014-02-06|
    CN103010247A|2013-04-03|
    US20130255532A1|2013-10-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3516365A|1968-03-27|1970-06-23|Gen Steel Ind Inc|Motorized railway car truck|
    CA1071026A|1976-02-09|1980-02-05|Herbert Scheffel|Railway vehicle suspension|
    US5609109A|1994-07-05|1997-03-11|Standard Research And Design Corporation|Frame brace integral cross brace support bracket|
    CN2230260Y|1994-09-29|1996-07-03|齐齐哈尔车辆厂|Supportor and elastic shear washer in elastic crossing part of side steering rack of goods train|
    US5579696A|1995-09-11|1996-12-03|Standard Research And Design Corporation|Rail car side frame car progressor contact|
    CN2910705Y|2006-05-29|2007-06-13|中国北车集团齐齐哈尔铁路车辆有限责任公司|Bogie of railway wagon|
    AU2007216934A1|2006-09-28|2008-04-17|Ture Nyholm|Bogie with Brace|
    CN101700775B|2009-11-27|2011-06-08|齐齐哈尔轨道交通装备有限责任公司|Bogie for freight car and freight car|
    CN201808569U|2010-09-29|2011-04-27|齐齐哈尔轨道交通装备有限责任公司|Cross support bogie|
    US9346098B2|2011-05-17|2016-05-24|Nevis Industries Llc|Side frame and bolster for a railway truck and method for manufacturing same|CA2814936C|2012-12-19|2015-06-16|Qiqihar Railway Rolling Stock Co., Ltd.|Bogie and side frame thereof|
    US20140174317A1|2012-12-21|2014-06-26|Amsted Rail Company, Inc.|Brake beam paddle caps|
    CN103386990A|2013-08-02|2013-11-13|哈尔滨工程大学|Wagon bogie|
    CN103538597B|2013-11-06|2016-03-02|齐齐哈尔轨道交通装备有限责任公司|Bogie truck cross-braced device supporting seat and bogie truck|
    CN203902570U|2014-06-23|2014-10-29|齐齐哈尔轨道交通装备有限责任公司|Railway wagon bogie and side frame of railway wagon bogie|
    RU169061U1|2016-05-04|2017-03-02|Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I"|A node for connecting a side frame with a wheelset in a trolley of a freight railway car|
    RU2654649C2|2016-05-12|2018-05-21|Общество с ограниченной ответственностью Управляющая Компания "РэйлТрансХолдинг"|Solebar of the truck the rail freight car|
    RU205615U9|2016-06-09|2021-08-20|Общество с ограниченной ответственностью "Всесоюзный научно-исследовательский центр транспортных технологий" |SIDE FRAME OF THE FREIGHT CAR BARROW|
    RU171017U1|2016-09-09|2017-05-17|Акционерное Общество "Научно-Внедренческий Центр "Вагоны"|FREIGHT Wagon Trolley|
    CN106494446A|2016-10-18|2017-03-15|张家港特锐机械制造有限公司|Rail transit train bogie|
    RU171521U1|2016-12-29|2017-06-05|Общество с ограниченной ответственностью "Всесоюзный научно-исследовательский центр транспортных технологий" |Side frame of a freight car truck|
    RU174742U1|2017-04-07|2017-10-31|РЕЙЛ 1520 АйПи ЛТД|SIDE FRAME OF THE TRUCK OF A CAR|
    RU173007U1|2017-05-03|2017-08-04|Акционерное общество "Научно-внедренческий центр "Вагоны" |SIDE FRAME OF THE TRUCK OF A CAR|
    RU179893U1|2017-10-24|2018-05-28|РЕЙЛ 1520 АйПи ЛТД|SIDE FRAME OF THE TRUCK OF A CAR|
    RU181477U1|2018-01-11|2018-07-16|Общество с ограниченной ответственностью "ВКМ-СТАЛЬ"|Trolley side frame|
    RU181407U1|2018-01-11|2018-07-12|Общество с ограниченной ответственностью "ВКМ-СТАЛЬ"|TRUCK CAR|
    RU195538U1|2019-11-22|2020-01-30|Акционерное общество «Научно-производственная корпорация «Уралвагонзавод» имени Ф.Э. Дзержинского»|Side frame of a freight wagon trolley|
    RU206022U1|2021-04-12|2021-08-16|Общество с ограниченной ответственностью "Всесоюзный научно-исследовательский центр транспортных технологий" |SIDE FRAME OF A CARGO WAGON|
    法律状态:
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-06-16| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-07-20| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-17| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-08-24| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 29/08/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201110296326.X|2011-09-27|
    CN201110296326XA|CN103010247A|2011-09-27|2011-09-27|Bogie of railway vehicle and railway vehicle|
    PCT/CN2012/080676|WO2013044710A1|2011-09-27|2012-08-29|Railway wagon bogie and railway wagon|
    [返回顶部]