CN-121990014-A - Underframe, automobile body and rail vehicle

CN121990014ACN 121990014 ACN121990014 ACN 121990014ACN-121990014-A

Abstract

The application relates to the technical field of railway vehicles, and provides an underframe, a vehicle body and a railway vehicle, wherein the underframe comprises a middle underframe, two end underframes and two end underframes, the middle underframe comprises a plurality of middle cross beams and middle longitudinal beams, the two end underframes are oppositely arranged at two ends of the middle underframe, the end underframe comprises a sleeper beam, a plurality of sleeper beams and sleeper longitudinal beams, the sleeper longitudinal beams are provided with variable cross-section structures, and the variable cross-section structures are used for enabling the sleeper longitudinal beams and the middle longitudinal beams to be in continuous arrangement in the longitudinal direction. The longitudinal girder in the sleeper is longitudinally and generally arranged along the underframe, transmits longitudinal tensile load and compression load step by step and bears vertical load and torsion load of the vehicle body, adopts a variable cross-section structure to ensure that the longitudinal girder in the sleeper and the middle longitudinal girder can be longitudinally and continuously arranged, ensures continuous transition of force flow transmission, avoids abrupt change or notch effect, and meanwhile, the variable cross-section longitudinal girder also bears vertical load and torsion load of the vehicle body, thereby improving the strength, rigidity and torsion performance of the vehicle body.

Inventors

DU JIANQIANG
LIU JIN
LI FUQIANG
WU SHENGQUAN
DONG CHANGLU
WANG ZHAOMEI
ZHANG YING
PING YAO
CHEN HAIKUAN
WANG ZHIJUN
CHEN YONGSHENG
LIANG YONGTING

Assignees

中车唐山机车车辆有限公司

Dates

Publication Date: 20260508
Application Date: 20260326

Claims (14)

1. A chassis, comprising: The middle underframe comprises a plurality of middle cross beams and middle longitudinal beams, wherein the middle cross beams are arranged along the transverse direction of the underframe, the middle cross beams are arranged along the longitudinal direction of the underframe, the middle longitudinal beams are arranged along the longitudinal direction of the underframe, and the middle cross beams and the middle longitudinal beams are arranged in a staggered manner; The two end underframes are oppositely arranged at two ends of the middle underframe, each end underframe comprises a sleeper beam, a plurality of sleeper beams and sleeper beams, the sleeper beams and the sleeper beams are arranged transversely to the underframe, the sleeper beams and the sleeper beams are arranged longitudinally to the underframe and between the sleeper beams and the middle underframe, the sleeper beams are arranged longitudinally to the underframe, the longitudinal two ends of the sleeper beams are respectively connected with the sleeper beams and the middle underframe, the sleeper beams are of variable cross-section structures, and the variable cross-section structures are used for enabling the sleeper beams and the middle longitudinal beams to be long in the longitudinal direction and to be continuously arranged.
2. The undercarriage of claim 1 wherein said intra-pillow stringers comprise: The end part longitudinal beam, the force transmission longitudinal beam, the first longitudinal beam and the second longitudinal beam are sequentially arranged from front to back on the longitudinal direction of the end part chassis towards the middle part chassis, and all the beam bodies are completely in butt joint.
3. The undercarriage of claim 2 wherein said first longitudinal beam has a first variable cross-sectional configuration for increasing the cross-sectional area of said first longitudinal beam from front to back; and/or the second longitudinal beam is provided with a second variable cross-section structure, and the cross-sectional area of the second longitudinal beam is arranged in a descending way from front to back.
4. The chassis of claim 3, wherein the end stringers, the force transfer stringers, the first stringers, and the second stringers are all C-shaped stringers; the first longitudinal beam comprises a first web plate and two first wing plates, the two first wing plates are arranged on two sides of the first web plate in the width direction, and the width of each first wing plate is gradually increased from front to back; the second longitudinal beam comprises a second web plate and two second wing plates, the two second wing plates are arranged on two sides of the second web plate in the width direction, and the width of each second wing plate is gradually decreased from front to back; wherein the first web and the second web, the first wing plate and the second wing plate are respectively and continuously arranged in the longitudinal direction.
5. The chassis of claim 4, wherein the first wing is a right trapezoid, the first web being connected to a hypotenuse of the right trapezoid; the second wing plate is of a right trapezoid structure, and the second web plate is connected with right-angle edges of the right trapezoid structure.
6. The chassis of claim 2, wherein the intra-pillow cross member comprises a first cross member positioned between the end rail and the force transfer rail; In the longitudinal direction of the undercarriage, the vertical height of the end stringers decreases from front to back to connect the upper surface of the bolster and the upper surface of the first cross member.
7. The undercarriage of claim 2 wherein said intra-sleeper beam further comprises a trolley beam positioned between said force transfer rail and said first rail; the inside of the trolley crossbeam is provided with a longitudinal rib plate which is used for connecting the web plate of the force transmission longitudinal beam and the first web plate of the first longitudinal beam.
8. The undercarriage of claim 7 wherein said cross-car beam comprises two first and second C-beams disposed opposite each other to form a mouth-shaped beam, said longitudinal webs being welded to said first and second C-beams, respectively; The first C-shaped beam is of an integrated structure arranged along the transverse through length, and the second C-shaped beam is formed by welding a plurality of sections of second C-shaped beam bodies arranged along the transverse direction and is used for providing welding avoidance openings for the longitudinal rib plates.
9. The undercarriage of claim 1 wherein said central longitudinal beam is a C-beam; The bottom of the middle longitudinal beam opposite to the water receiving box is provided with an avoidance port, and the wing plates of the C-shaped beam of the middle longitudinal beam are arranged at the avoidance port in a longitudinal continuous mode.
10. The chassis of claim 1, wherein the middle chassis further comprises: The two side beams are oppositely arranged, and the transverse two ends of the middle cross beam and the end underframe are respectively fixed with the two side beams; the side beam is a C-shaped beam; the side web plate of the side beam is positioned in the side beam corresponding to the large-opening bearing door, and the side web plate of the side beam and the C-shaped beam of the side beam form a square-shaped closed structure.
11. The chassis of claim 1, further comprising: The section bar floor is laid above the middle underframe and the end underframe; the floor beams are laid above the profile floor, the floor beams are C-shaped, a plurality of strip-shaped mounting holes extending longitudinally are formed in the top surfaces of the floor beams, anti-rotation grooves are formed in the inner top surfaces of the floor beams, and the anti-rotation grooves are arranged corresponding to the strip-shaped mounting holes.
12. The chassis of claim 11, further comprising: the water receiving tank is positioned above the profile floor corresponding to the large-opening bearing door, and the bottom surface of the water receiving tank is fixed with the profile floor; And/or the apron board is positioned below the middle underframe corresponding to the large-opening bearing door, and the apron board is fixed with the middle underframe.
13. The vehicle body is characterized by comprising a vehicle roof, side walls, end walls and the underframe according to any one of claims 1-12, wherein one side wall is arranged on each side of the underframe, one end wall is arranged on each end of the underframe, and a large-opening bearing door is arranged on any one side wall.
14. A rail vehicle comprising the vehicle body of claim 13.

Description

Underframe, automobile body and rail vehicle Technical Field The application relates to the technical field of railway vehicles, in particular to an underframe, a vehicle body and a railway vehicle. Background The speed per hour 200 km power centralized fast motion train body structure and section contour inherit the speed per hour 200 km power centralized passenger motion train body, 200 fast motion train body strength is according to TB/T3550.1' first part of locomotive vehicle strength design and test identification standardization train body: passenger train body, the train body is a plate girder thin-wall barrel type integral bearing structure, the underframe, the side wall and the roof share the train body corresponding load, the side part is provided with a large opening loading door, the original longitudinal load and the vertical load which are shared by the side wall are weakened, the notch and mutation effect generated by the side wall large opening door weakens the integral strength and rigidity of the train body, and the underframe shares more longitudinal load, vertical load and torsion load on the premise of not changing the section contour of the train body and changing the large structure. The side door with the large opening degree of the vehicle body generates a notch effect, the side wall bears load and reduces, the chassis needs to share more longitudinal, vertical and torsional loads of the vehicle body, and the existing chassis structure cannot meet the longitudinal, transverse and torsional loads. The longitudinal load is decomposed into side beams of the side parts and longitudinal beams of the middle part behind the sleeper beams, the longitudinal beams between 3-4 beams in the sleeper beams decompose the longitudinal compression and tensile force flows to the corrugated plates, the conventional corrugated plate structure is insufficient in longitudinal load transmission (the materials, the thickness and the structure are required to be changed when the load performance is increased), and the vertical load and the torsional load are borne by the conventional chassis side beams and sleeper beams, so that the displacement of the side beams with insufficient chassis rigidity is increased, and the weight of the load borne by the vehicle is restricted. The existing non-through long through single-wall floor beam bears the longitudinal, vertical and torsional loads of the vehicle body, the floor code does not contribute to the longitudinal, vertical and torsional loads of the vehicle body, and the production and assembly efficiency is low. The addition of the center sill of the underframe can improve the longitudinal, vertical and torsional loads of the underframe, but the center sill structure of the underframe greatly increases the weight of the car body. The structural arrangement of the center sill affects the contour of the vehicle body and the layout of equipment under the vehicle, and more particularly affects the axle weight of the vehicle. The above information disclosed in the background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Disclosure of Invention The embodiment of the application provides a chassis, a vehicle body and a railway vehicle, which are used for solving the problem that the existing chassis cannot meet the requirements of longitudinal, transverse and torsional loads after the vehicle body is provided with a side door with a large opening. In order to achieve the above purpose, the present application provides the following technical solutions: A chassis, comprising: The middle underframe comprises a plurality of middle cross beams and middle longitudinal beams, wherein the middle cross beams are arranged along the transverse direction of the underframe, the middle cross beams are arranged along the longitudinal direction of the underframe, the middle longitudinal beams are arranged along the longitudinal direction of the underframe, and the middle cross beams and the middle longitudinal beams are arranged in a staggered manner; The two end underframes are oppositely arranged at two ends of the middle underframe, each end underframe comprises a sleeper beam, a plurality of sleeper beams and sleeper beams, the sleeper beams and the sleeper beams are arranged transversely to the underframe, the sleeper beams and the sleeper beams are arranged longitudinally to the underframe and between the sleeper beams and the middle underframe, the sleeper beams are arranged longitudinally to the underframe, the longitudinal two ends of the sleeper beams are respectively connected with the sleeper beams and the middle underframe, the sleeper beams are of variable cross-section structures, and the variable cross-section structures are used for enabling the sleeper beams and the middle longitudinal bea