Search

EP-4737258-A1 - CLADDING STRUCTURE FOR BOGIE, BOGIE ASSEMBLY AND RAIL VEHICLE

EP4737258A1EP 4737258 A1EP4737258 A1EP 4737258A1EP-4737258-A1

Abstract

A cladding structure (100) for a bogie (200), comprising a bottom plate (1), wherein the bottom plate (1) is used for cladding the bottom of the bogie (200), an opening portions (1a) are provided in the bottom plate (1), and the opening portions (1a) are used for avoiding wheels (23) of a rail vehicle. Further disclosed are a bogie assembly and a rail vehicle. The cladding structure (100) clads the bottom of the bogie (200), and when flowing through the bottom of the bogie (200), an airflow directly flows away through a bottom surface of the bottom plate (1), thereby reducing the aerodynamic resistance in the area of the bogie (200). Each opening portion (1a) occupies a small space, which can reduce the effect of the resistance caused by the airflow entering the bogie (200) from the opening portion (1a), without affecting the effect of the cladding structure (100) reducing the running resistance.

Inventors

  • MA, LIJUN
  • TAO, Guidong
  • ZOU, Xiaolong
  • ZHANG, Zhenxian
  • FENG, YONGHUA
  • NIE, YING
  • XU, XIN
  • LIU, NING
  • YIN, HAO

Assignees

  • CRRC Qingdao Sifang Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240701

Claims (20)

  1. A cladding structure for a bogie, wherein the cladding structure comprises a base plate configured to clad a bottom portion of the bogie, and the base plate is provided with opening portions for avoiding wheels of a rail vehicle respectively.
  2. The cladding structure for the bogie according to claim 1, wherein each opening portion is a notch formed in an end portion of the base plate; and/or a guard plate extending upwardly is provided at an edge of each opening portion.
  3. The cladding structure for the bogie according to claim 1, wherein the base plate is provided with a sunken portion for receiving a brake disc of the bogie, and the sunken portion comprises a wall bulging downwardly with respect to a bottom surface of the base plate, and an outer surface which is streamlined; or the avoidance slot is configured to allow passage of at least part of a wheel-mounted brake disc of the bogie.
  4. The cladding structure for the bogie according to claim 3, wherein the outer surface of the sunken portion is in a spindle shape or a drop shape.
  5. The cladding structure for the bogie according to claim 1, wherein each of two side edges of the base plate extends upwardly to form a side flange, and/or, each of end edges of the base plate extends upwardly to form an end flange.
  6. The cladding structure for the bogie according to any one of claims 1 to 5, further comprising a mounting arm which comprises a first connecting seat and a second connecting seat, wherein the first connecting seat is connected to the base plate, and the second connecting seat is connected to an end portion of a side sill of the bogie.
  7. The cladding structure for the bogie according to claim 6, wherein a sand spreading device and/or an obstacle removal device is mounted on the mounting arm.
  8. The cladding structure for the bogie according to claim 7, wherein the mounting arm is disposed at the opening portion, a side edge of the opening portion is provided with a side flange extending upwardly, and the first connecting seat comprises a U-shaped plate which is engaged with and fixed to the side flange.
  9. The cladding structure for the bogie according to any one of claims 1 to 5, wherein the cladding structure further comprises a support skeleton, which is fixed to the base plate and configured to be connected with a framework of the bogie.
  10. A cladding structure for a bogie, wherein the cladding structure is configured to clad a bottom portion of the bogie, the bogie is provided with a framework body (1) and an axle-mounted brake disc (11), and the cladding structure (2) for the bogie comprises: a mounting crossbeam (2a) for fixedly connecting to the framework body (1) of the bogie; and at least two mounting plates (2b) fixedly disposed on the mounting crossbeam (2a), wherein at least one of the mounting plates (2b) is configured to be fixedly connected to the framework body (1) of the bogie, at least one of the mounting plates (2b) is provided with an accommodating portion (26) for accommodating the axle-mounted brake disc (11), and a bottom portion of the accommodating portion (26) bulges from an outer surface of the mounting plate (2b).
  11. The cladding structure for the bogie according to claim 10, wherein the portion of the accommodating portion (26) bulging from the outer surface of the mounting plate (2b) is in a spindle shape.
  12. The cladding structure for the bogie according to claim 10, wherein each of the mounting plates (2b) is detachably mounted on the mounting crossbeam (2a) by a mortise and tenon structure.
  13. The cladding structure for the bogie according to claim 12, wherein the mounting crossbeam (2a) comprises a first mounting crossbeam (21) and a second mounting crossbeam (22) arranged in parallel, each of the first mounting crossbeam (21) and the second mounting crossbeam (22) is arranged perpendicular to a traveling direction of the bogie; the mounting plate (2b) comprises two side plates (24), two end plates (23) and an access door (25), the two side plates (24) are disposed at opposite ends in a lengthwise direction of the first mounting crossbeam (21) and the second mounting crossbeam (22) respectively, the two end plates (23) are disposed at a front end of the first mounting crossbeam (21) and a rear end of the second mounting crossbeam (22) respectively, and the access door (25) is disposed between the front end of the first mounting crossbeam (21) and the second mounting crossbeam (22); and the accommodating portion (26) is provided on each end plate (23).
  14. The cladding structure for the bogie according to claim 13, wherein one of the access door (25) and the first mounting crossbeam (21) is provided with a first protruding part (252), and the other of the access door (25) and the first mounting crossbeam (21) is provided with a first recess (211) that matches with the first protruding part (252), and the first protruding part (252) is inserted in the first recess (211); and at least one of the access door (25) and the second mounting crossbeam (22) is provided with a locking mechanism for locking or unlocking the access door (25).
  15. The cladding structure for the bogie according to claim 14, wherein the locking mechanism comprises a latch (251) which is movable between a first position and a second position and extends from the access door (25); and the second mounting crossbeam (22) is provided with a locking protrusion (221) and an unlocking groove (222), the latch (251) is configured to be engaged with the locking protrusion (221) to lock and close the access door (25) when the latch (251) is moved to the first position, and to be engaged with the unlocking groove (222) to unlock and open the access door (25) when the latch (251) is moved to the second position.
  16. The cladding structure for the bogie according to any one of claims 13 to 15, wherein an avoidance slot (27) for passage of a wheel (7) is formed between each of two sides of each end plate (23) and the corresponding side plate (24), and at least one of the end plate (23) and each side plate (24) adjacent to the end plate (23) is provided with a fender (28), which is located radially outside of the wheel (7) and is gradually inclined in a direction close to the wheel (7) from the bottom to the top.
  17. The cladding structure for the bogie according to any one of claims 10 to 15, wherein the mounting plate (2b) is assembled with the mounting crossbeam (2a) to form a ship-shaped structure with a flat surface in the middle and upwardly inclined surfaces at both ends in a traveling direction.
  18. A bogie assembly comprising a bogie, and the cladding structure for the bogie according to any one of claims 1 to 17, wherein the cladding structure clads a bottom portion of the bogie.
  19. A bogie assembly comprising: a bogie; the cladding structure for the bogie according to any one of claims 1 to 9, wherein the cladding structure clads a bottom portion of the bogie; and a mounting seat (3) provided in the middle of a framework body (1) in a traveling direction of the vehicle, wherein the cladding plate (4) is fixedly connected to the mounting seat (3).
  20. The bogie assembly according to claim 19, wherein a bottom surface of the cladding plate is a flat surface.

Description

The present application claims the priorities to the following three Chinese Patent Applications, the entire contents of which are incorporated herein by reference. 1. Chinese Patent Application No. 202310796439.9, titled "CLADDING DEVICE FOR BOGIE, BOGIE AND RAIL VEHICLE", filed with the China National Intellectual Property Administration on June 30, 2023;2. Chinese Patent Application No. 202310796806.5, titled "CLADDING STRUCTURE, BOGIE ASSEMBLY AND RAIL VEHICLE", filed with the China National Intellectual Property Administration on June 30, 2023; and3. Chinese Patent Application No. 202321707911.9, titled "BOGIE DEVICE AND RAIL VEHICLE", filed with the China National Intellectual Property Administration on June 30, 2023. FIELD The present application relates to the technical field of rail vehicles and, in particular, to a cladding structure for a bogie, a bogie assembly, and a rail vehicle. BACKGROUND A high-speed multiple unit includes a bogie provided at the bottom of a vehicle body. The bogie has a complex structure, and includes a framework. In addition to wheels and brake discs, various components such as suspension, anti-yaw damper and anti-roll torsion bar may be amounted on the framework. During running, a large aerodynamic resistance is generated when airflow passes through a bogie region, which influences the energy consumption of a vehicle during running. SUMMARY The present application provides a cladding structure including a base plate configured to clad a bottom portion of the bogie. The base plate is provided with opening portions for avoiding wheels of a rail vehicle respectively. In an embodiment, the opening portion is a notch formed in an end portion of the base plate; and/or, a guard plate extending upwardly is provided at an edge of the opening portion. In an embodiment, the base plate is provided with a sunken portion for receiving a brake disc of the bogie, and the sunken portion includes a wall bulging downwardly with respect to a bottom surface of the base plate, and an outer surface which is streamlined. In an embodiment, the outer surface of the sunken portion is in a spindle shape or a drop shape. In an embodiment, each of two side edges of the base plate extends upwardly to form a side flange, and/or, each of end edges of the base plate extends upwardly to form an end flange. In an embodiment, a mounting arm is further included. The mounting arm includes a first connecting seat and a second connecting seat. The first connecting seat is connected to the base plate, and the second connecting seat is connected to an end portion of a side sill of the bogie. In an embodiment, a sand spreading device and/or an obstacle removal device is mounted on the mounting arm. In an embodiment, the mounting arm is disposed at the opening portion. A side edge of the opening portion is provided with a side flange extending upwardly, and the first connecting seat includes a U-shaped plate which is engaged with and fixed to the side flange. In an embodiment, the cladding structure further includes a support skeleton, which is fixed to the base plate and configured to be connected with a framework of the bogie. The present application further provides a bogie assembly including a bogie and a cladding structure cladding the bottom portion of the bogie and being the cladding structure for the bogie as described in any one of the foregoing embodiments. The present application further provides a rail vehicle including the bogie assembly described in any one of the foregoing embodiments. The cladding structure according to the present application can clad the bottom portion of the bogie, so that the airflow, when flowing past the bottom portion of the bogie, will not flow into complex components within the bogie, but will flow away directly along a bottom surface of the base plate, thereby reducing an aerodynamic resistance to which the bogie region is subjected, and reducing the energy consumption of the vehicle during running. In addition, the base plate is provided with the opening portion for avoiding the wheel. Since the cladding structure is fixed to the framework of the bogie with less relative movement to the wheel, the opening portion located for avoiding the wheel occupies a small space, so that the influence of the resistance caused by the airflow flowing into the bogie through the opening portion can be mitigated, without influencing the effect of the cladding structure in reducing the resistance during running. The present application further provides a cladding structure for a bogie. The cladding structure is configured to clad a bottom portion of the bogie, and the bogie is provided with a framework body and an axle-mounted brake disc. The cladding structure for a bogie includes: a mounting crossbeam for fixedly connecting to the framework body of the bogie; andat least two mounting plates fixedly disposed on the mounting crossbeam. At least one of the mounting plates is configured to be