A high-floor articulated light rail car sleeper beam structure

Abstract

A high-floor articulated light rail vehicle sleeper beam structure, characterized in that it comprises an upper cover plate, a lower cover plate, a left annular support, a right annular support, a connecting flange, and two side vertical plates, wherein the upper and lower cover plates are correspondingly arranged and have corresponding central circular holes, the lower cover plate is welded to the outer ring of the connecting flange through the central circular hole, a symmetrical left annular support and a right annular support are fixedly connected to the outer ring of the connecting flange between the upper and lower cover plates, and the two side vertical plates are butt-welded to the upper and lower cover plates. The present invention enhances the structural rigidity and strength by welding and butting the upper and lower cover plates, the left and right annular supports, the connecting flange and the two side vertical plates, and utilizes the unique shape design of each component and the butt welding of each part to match, so as to realize the connection between the high-floor articulated light rail vehicle sleeper beam structure and a bogie with a slewing bearing, has a simple interface, is conducive to improving the manufacturing accuracy of the sleeper beam structure, saves vehicle assembly time and after-sales inspection and maintenance time, and simplifies the force relationship between the vehicle body and the bogie.

Description

Technical Field

[0001] The invention belongs to the technical field of rail vehicle end underframe manufacturing, and in particular relates to a high-floor articulated light rail vehicle sleeper beam structure. Background Art

[0002] High-floor articulated light rail vehicles are widely used because they reduce the number of bogies and the weight per unit length of the train. They also have many advantages such as low running noise, good curve passing ability, and smooth operation. However, in the past, the aluminum alloy subway sleeper structure ( Figure 1 ) and stainless steel subway vehicle body bolster structure ( Figure 2 ) cannot be connected to a bogie with a slewing bearing. Therefore, designing a high-floor articulated light rail car bolster structure that can be connected to a bogie with a slewing bearing has become an important issue that needs to be urgently solved in the rail transit industry. Summary of the invention

[0003] The purpose of the present invention is to provide a high-floor articulated light rail vehicle bolster structure to achieve connection with a bogie with a slewing bearing, thereby filling a gap in the rail transit industry and meeting the demand for increasingly smaller curve radii for modern rail transit vehicles.

[0004] In order to achieve the above-mentioned invention object, the present invention provides a high-floor articulated light rail car sleeper beam structure, which is characterized by comprising an upper cover plate, a lower cover plate, a left annular support, a right annular support, a connecting flange, and two side vertical plates, the upper and lower cover plates are correspondingly arranged and have corresponding central circular holes, the lower cover plate is welded to the outer ring of the connecting flange through the central circular hole, a symmetrical left annular support and a right annular support are fixedly connected between the upper and lower cover plates at the outer ring of the connecting flange, and the two side vertical plates are butt-welded to the upper and lower cover plates.

[0005] Preferably, the upper and lower cover plates each include three corresponding left, middle and right parts, and the outer sides of the left and right parts both adopt a dovetail structure, which is stable after welding with the vehicle body side beams, and is more conducive to force transmission.

[0006] Preferably, the middle parts of the upper and lower cover plates are made of stainless steel plates, with U-shaped grooves at the four corners.

[0007] Preferably, the height difference is set on the inner sides of the left and right parts of the lower cover plate by bending, thereby ensuring the installation space between the two sides of the bolster and the bogie frame and auxiliary equipment.

[0008] Preferably, the area of ​​the two side vertical panels connected to the middle part of the upper and lower cover plates is in the shape of a "J" and is butt-welded to the bottom edges of the U-shaped grooves at the four corners of the middle part of the upper and lower cover plates, and the bottoms of the left and right ends of the two side vertical panels are butt-welded to the bent parts of the left and right parts of the lower cover plate to enhance the structural rigidity and strength.

[0009] The present invention utilizes the unique shape design of each component and the matching butt welding of each part to enhance the structural rigidity and strength, realize the connection between the high-floor articulated light rail vehicle bolster structure and the bogie with slewing bearing, and has a simple interface, which is conducive to improving the manufacturing accuracy of the bolster structure, saving vehicle assembly time and after-sales repair and maintenance time, simplifying the force relationship between the car body and the bogie, and increasing the accuracy of the finite element simulation analysis results, contributing to the weight reduction design of the car body and the improvement of vehicle comfort. In particular, the upper and lower cover plates adopt a dovetail structure, which is butt-welded with the chassis side beams, breaking through the previous lap joint structure, and the vertical plates adopt a "J" shape, which increases the structural cross-sectional area, enhances the structural rigidity and strength, and the design working condition requirements of the main structure of the bolster are not lower than the vehicle strength EN12663P-IV level requirements and the collision EN15227 C-IV level requirements.

[0010] Through the inquiry of papers and materials, it is known that the curve passing capacity of high-low floor articulated light rail vehicles on the market is basically R40m, R30m, and R25m. The high-floor articulated light rail vehicle sleeper beam structure designed by the present invention is suitable for the industry's higher level requirement of R25m curve passing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the aluminum alloy subway car body bolster structure;

[0012] Figure 2 This is a schematic diagram of the stainless steel subway car body bolster structure;

[0013] Figure 3 It is an isometric view of the bolster structure of the present invention;

[0014] Figure 4 This is an exploded view of the bolster structure of the present invention;

[0015] Figure 5 It is the cross-sectional view of the connecting flange;

[0016] Figure 6 This is a cross-sectional view of the corbel structure;

[0017] Figure 7 This is a bottom view of the corbel structure;

[0018] Figure 8 It is a schematic diagram of the connection between the present invention and the bogie. DETAILED DESCRIPTION

[0019] like Figure 3 , 4As shown in the figure, the main material of the bolster structure of a high-floor articulated light rail vehicle is stainless steel, and high-strength carbon steel is used at the connection with the bogie. The main structure includes: upper cover plate 1, lower cover plate 2, left annular support 3, right annular support 4, connecting flange 5, upper right cover plate 6, upper left cover plate 7, left vertical plate 8, middle vertical plate 9, right vertical plate 10, lower left cover plate 11, lower right cover plate 12, left vertical plate 13, middle vertical plate 14, and right vertical plate 15.

[0020] The upper cover plate 1 is a 10-mm-thick stainless steel plate, with a centrally machined round hole of 547 mm in diameter and U-shaped grooves at the four corners, which is more conducive to the transmission of force after welding. The lower cover plate 2 is a 12-mm-thick stainless steel plate, with a centrally machined round hole of 648 mm in diameter and U-shaped grooves at the four corners. The left annular support 3 and the right annular support 4 are 8-mm-thick stainless steel semi-rings with an inner diameter of 578 mm, which play a major supporting role in the bolster structure. The connecting flange 5 is a 50-mm-thick carbon steel plate, which needs to be machined from a 60-mm-thick carbon steel blank. The inner diameter ф3 is 472 mm, and the 22-mm round hole with diameter ф1 in the figure needs to be machined integrally after welding to ensure the installation accuracy of the connecting flange and the bogie with a slewing bearing, which plays a decisive role in the smooth operation of the vehicle and the comfort of passengers. The outer diameter ф2 is 546 mm. The left and right upper cover plates 6 and 7 are 10-mm-thick stainless steel plates, and a dovetail structure is adopted at the connection with the car body side beam. After welding, the structure is stable and more conducive to the transmission of force.对接焊缝焊接,焊后打磨平整,不影响地板及内装设备安装。左右上下立板8、10、13、15为6mm不锈钢板,形状参考枕梁外形适用性设计。中立板9、14为6mm不锈钢板,形状采用“几”字型,加大了结构截面积,增强结构刚度及强度。左右下盖板11、12为12mm不锈钢板,与车体边梁连接处采用燕尾型结构,同时,左右下盖板11、12通过折弯设置高低差,保证了枕梁两侧与转向架构架及附属设备的安装空间。

[0021] The upper cover plate 1, the lower cover plate 2, the left annular support 3, the right annular support 4 and the connecting flange 5 are first welded, and the welded components are then welded to the upper right cover plate 6, the upper left cover plate 7, the left vertical plate 8, the middle vertical plate 9, the right vertical plate 10, the lower left cover plate 11, the lower right cover plate 12, the left vertical plate 13, the middle vertical plate 14, and the right vertical plate 15.

[0022] As Figure 8 shown, after the bolster structure is welded, it is machined integrally. The flatness of the installation surface can be guaranteed after machining. At the same time, a round hole with a diameter of 22 mm is machined. The vehicle body is connected to the bogie with a slewing bearing using M20 bolts. The connection design here meets the vehicle operation requirements. At the same time, it is considered that the bogie can be lifted synchronously when the vehicle body is lifted, and the whole structure is not damaged under key loads such as low-speed derailment. High-strength steel is used at the key parts of the bolster, and the key welds are inspected for flaws to ensure the reliable stability of the structure.

Claims

1. A high-floor articulated light rail car sleeper beam structure, characterized in that: It includes an upper cover plate, a lower cover plate, a left annular support, a right annular support, a connecting flange, and two side vertical plates. The upper and lower cover plates are correspondingly arranged and have corresponding central circular holes. The lower cover plate is welded to the outer ring of the connecting flange through the central circular hole. A symmetrical left annular support and a right annular support are fixedly connected to the outer ring of the connecting flange between the upper and lower cover plates, and the two side vertical plates are butt welded to the upper and lower cover plates. The upper and lower cover plates each include three corresponding left, middle and right parts, and the outer sides of the left and right parts both adopt a dovetail structure. The left annular support and the right annular support are stainless steel semicircular rings. The middle part of the upper and lower cover plates is a stainless steel plate with U-shaped grooves at the four corners.

2. The high-floor articulated light rail car bolster structure according to claim 1, characterized in that: The height difference is set on the inner sides of the left and right parts of the lower cover through bending, which ensures the installation space between the two sides of the bolster and the bogie frame and auxiliary equipment.

3. The high-floor articulated light rail car bolster structure according to claim 1, characterized in that: The area of ​​the two side vertical plates that connects to the middle part of the upper and lower cover plates is in the shape of a "J" and is butt-welded to the bottom edges of the U-shaped grooves at the four corners of the middle part of the upper and lower cover plates. The bottom of the left and right ends of the two side vertical plates are butt-welded to the bent parts of the left and right parts of the lower cover plate.

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