WO2022062108A1

WO2022062108A1 - Connecting structure for rail vehicle bolster and floor plate

Info

Publication number: WO2022062108A1
Application number: PCT/CN2020/128075
Authority: WO
Inventors: 杜彦品; 朱亮; 高健飞; 杨智朋; 王潇雨; 牛永刚
Original assignee: 中车南京浦镇车辆有限公司
Priority date: 2020-09-24
Filing date: 2020-11-11
Publication date: 2022-03-31
Also published as: CN112249070A

Abstract

Disclosed is a connecting structure for a rail vehicle bolster (1) and a floor plate. The connecting structure comprises a bolster (1), a corrugated floor plate (3), and a floor plate connecting beam (2). The floor plate connecting beam (2) has a hat-shaped structure, and has an inverted U-shaped portion and a first flange (21) and a second flange (22) respectively located at the front and the rear of the inverted U-shaped portion. The first flange (21) is disposed on an upper cover plate of the bolster (1) and is fixed thereto. A front end of the corrugated floor plate (3) is disposed on an upper surface of the second flange (22) and is fixed thereto. The bolster (1) is connected to the corrugated floor plate (3) by means of the hat-like floor plate connecting beam (2). The hat-like shape visible in cross-section is easily deformable, and so only a small part of a longitudinal force is transmitted to the corrugated floor plate (3) via the connecting beam, and the longitudinal force is mainly transmitted backwards via two side beams. As a result, it is not necessary to provide a longitudinal beam behind the bolster, and a thin corrugated floor plate (3) having a small cross section can be used. The invention simplifies the structure of an underframe, reduces stress on the corrugated floor plate (3), reduces the weight of the underframe, extends the service life of the vehicle body, reduces processing difficulty, shortens the production cycle, and reduces manufacturing costs.

Description

A connection structure of rail vehicle corbel and floor

technical field

The invention belongs to the technical field of rail vehicle bodies, and particularly relates to a connection structure between a rail vehicle bolster and a floor.

Background technique

With the increase of train speed, higher requirements are put forward for the lightweight of the car body. At present, most of the rail passenger cars use steel car bodies, and the steel structure of the underframe usually adopts a structure without a middle beam to reduce the weight of the underframe. The inner floor of the pillow adopts corrugated floor to increase the vertical rigidity. The steel structure of the underframe is mainly composed of sleeper beams, cross beams, longitudinal beams, side beams and floors. The longitudinal load acts on the coupler mounting seat and is transmitted to the sleeper beam along the traction beam. Because the corrugated floor and the sleeper beam are welded to be rigid, the longitudinal force is transmitted backward along the corrugated floor, resulting in excessive stress at the connection between the sleeper beam and the corrugated floor. Longitudinal beams behind pillows and reinforcement plates on the floor reduce stress. This structure requires the addition of multiple sets of longitudinal beams to reduce the stress of the corrugated floor below the allowable stress. The structure is complex, there are many parts, the weight of the car body is large, the construction workload is large, the production cycle is long, and the manufacturing cost is high.

The main materials of the underframe of the existing 25 passenger cars and 160 km power-concentrated EMUs are weathering steel and low-alloy high-strength steel, with a sleeper structure without a middle beam. The beam and the corrugated floor in the sleeper are welded by connecting beams. The connecting beam is first painted with anti-rust primer and then welded with the pillow beam to form a closed cavity. After the bottom frame is formed, the closed cavity cannot be treated with anti-corrosion. When the connecting beam and the bolster are welded, the pre-brushed anti-rust layer of the bolster will be destroyed, reducing the life of the car body. There are usually four sets of longitudinal beams behind the sleeper, the corrugated floor is welded with the beams and longitudinal beams, the troughs on both sides are lap welded with the upper plane of the side beams, and the corrugated floor and the beams of the bottom frame transmit longitudinal force together.

After searching, it was found that the Chinese utility model patent CN200920313780.X discloses a stainless steel car body underframe, and the corrugated floor is used in the pillow, which is located under the beam, and the wave crest and the beam are spot welded. The space under the vehicle becomes smaller, and the equipment under the vehicle cannot be directly installed on the bottom frame beam.

technical problem

The purpose of the present invention is mainly to solve the above-mentioned complicated structure and high stress of corrugated floor in the prior art; there are many parts, which is not conducive to the lightweight of the car body; the connecting beam and the sleeper beam form a closed cavity, and the bottom frame cannot be anti-corrosion after being formed, and the car body cannot be protected from corrosion. Due to the problems of low body life, large construction workload, long production cycle and high manufacturing cost, a connection structure between a rail vehicle bolster and a floor is provided, which has a simple structure, good rigidity and low technological difficulty.

technical solutions

In order to solve the above technical problems, the present invention provides a connection structure between a rail vehicle bolster and a floor, including a bolster and a corrugated floor, and is characterized in that: the bolster and the corrugated floor are connected by a floor connecting beam, and the floor is connected The beam is a hat-shaped structure, which has an inverted U-shaped part and a first folded edge and a second folded edge respectively located at the front and rear of the inverted U-shaped part. The front end of the floor is placed on the upper surface of the second folded edge and fixed.

Further, an upward angle α is formed between the part of the second folded edge close to the inverted U-shaped part and the rear elevation of the U-shaped part, and the value of α ranges from 8° to 12°; the second folded edge is far away from the U-shaped part. The part of the upper part is horizontal and is used to support the corrugated floor.

Further, the first folded edge is provided with an oblong hole along the direction of the vehicle length; the bolster is a box-shaped structure, and the upper cover plate on the top of the bolster protrudes backward from the web, and the protruding part is provided with threaded holes, and the floor is connected. The first folded edge of the beam falls on the protruding portion, and the fastener passes through the oblong hole to fix the first folded edge and the upper cover of the corbel together.

In addition, the present invention also relates to a rail vehicle underframe structure, which is characterized in that it has the above-mentioned connection structure between the rail vehicle bolster and the floor.

The present invention also protects a rail vehicle, which is characterized by comprising the above-mentioned connection structure between the rail vehicle bolster and the floor.

beneficial effect

The beneficial effects of the present invention are as follows: after the structural longitudinal load of the present invention is transmitted from the traction beam to the sleeper beam, because the floor connecting beam adopts a hat-shaped section and is easy to deform, a small part of the longitudinal force is transmitted to the corrugated floor through the connecting beam, mainly through the two side beams. It is transmitted backward, so there is no need to set up the longitudinal beam behind the sleeper, and a small-section corrugated floor with a smaller thickness can be used. The invention simplifies the structure of the underframe, reduces the stress of the corrugated floor, reduces the weight of the underframe, increases the service life of the vehicle body, reduces the technological difficulty, shortens the production cycle and reduces the manufacturing cost. The structure can provide reference or reference for the underframe structure of the steel car body of the rail car with the corrugated floor.

Description of drawings

FIG. 1 is a top view of the connection structure of the corbel and the floor of the present invention.

FIG. 2 is a C-C cross-sectional view of FIG. 1 .

Figure 3 is a sectional view of the floor connecting beam.

The symbols in the figure are as follows: 1- corbel, 2- floor connecting beam, 3- corrugated floor, 4- side beam, 5- fastener.

Embodiments of the present invention

Embodiments of the present invention will be explained below with reference to the accompanying drawings.

The connection structure of the rail vehicle bolster and the floor in this embodiment is shown in FIG. 1 and FIG. 2 , and the floor connecting beam 2 is shown in FIG. 3 . The floor connecting beam 2 is made of stainless steel, and the floor connecting beam 2 is a hat-shaped structure, which has an inverted U-shaped portion 20 and a first folded edge 21 and a second folded edge 22 respectively located at the front and rear of the inverted U-shaped portion 20 . The height dimension of the floor connecting beam 2 is larger than the width dimension of the hat shape, the aspect ratio is large, and the connecting beam plate thickness is relatively thin, which is easy to deform when subjected to longitudinal horizontal force. The first folded edge 21 of the floor connecting beam 2 is provided with an upward flanging edge 23 to improve the rigidity of the connecting beam. The first folded edge 21 is provided with an oblong hole along the width direction of the connecting beam (vehicle length direction); 10±2° left and right angles are tilted upwards, and then level again. Both ends of the floor connecting beam 2 are provided with sealing plates.

The corbel 1 is a box-shaped structure and is made of carbon steel. The upper cover plate 11 protrudes from the web plate 12 by a certain size (about 85mm), and there are threaded holes on it, and the bolster is formed with an anti-rust primer. The first folded edge 21 of the floor connecting beam 2 falls on the rearward extension of the corbel upper cover plate 11 and is connected with the corbel upper cover plate 12 through the fastener 5 to avoid damage to the corbel upper cover plate anti-corrosion layer. The position of the floor connecting beam 2 can be appropriately adjusted along the vehicle length direction through the oblong hole on the first folded edge 21 . The corrugated floor 3 falls on the upper plane of the second folded edge 22 of the floor connecting beam 2 with a width of 30mm, and is welded with the floor connecting beam 2 under the wave valley. . The inner side of the second folded edge 22 of the floor connecting beam 2 is designed as an inclined surface, which can avoid the interference between the bending arc and the corrugated floor. The corrugated floor 3 is made of steel plate 1-SUS301L-ST. Since the longitudinal load is very small, the cross-sectional size of the peak and valley can be reduced when the vertical load is satisfied, with a height of 26mm and a wave width of 77mm. The gap between the floor connecting beam 2 and the upper cover plate 11 of the bolster is sealed with sealant, and the sealing plates at both ends are welded with the upper cover 11 of the bolster to ensure the sealing of the car body.

As shown in Figure 3, the floor connecting beam 2 is a special-shaped section similar to a hat shape. It is also provided with an upward flanging of 15mm to improve the rigidity of the bottom surface of the connecting beam. The bottom surface with a width of 40mm is provided with an oblong hole, and the length of the oblong hole is along the width of the bottom surface; the width of the bottom surface on the other side of the connecting beam is 30mm. And then level again, the two ends of the hat-shaped section of the floor connecting beam 2 are provided with sealing plates.

In addition to the above-described embodiments, the present invention may also have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

A connection structure between a corbel and a floor of a rail vehicle, comprising a corbel (1) and a corrugated floor (3), characterized in that: the corrugated floor (1) and the corrugated floor (3) are connected by a floor connecting beam (2). ) connection, the floor connecting beam (2) is a hat-shaped structure, which has an inverted U-shaped portion (20) and a first folded edge (21) and a second folded edge respectively located at the front and rear of the inverted U-shaped portion (20). (22), the first folded edge (21) falls on the upper cover of the corbel (1) and is fixed, and the front end of the corrugated floor (3) falls on the upper surface of the second folded edge (22) and is fixed.
The connection structure between the rail vehicle bolster and the floor according to claim 1, characterized in that: the part of the second folded edge (22) close to the inverted U-shaped part (20) and the rear elevation (20) of the U-shaped part (20) 24) an upward angle α is formed between them, and the value of α ranges from 8° to 12°; the part of the second folded edge (22) away from the U-shaped part (20) is horizontal and is used to support the corrugated floor (3 ).
The connection structure between the rail vehicle bolster and the floor according to claim 1, characterized in that the height dimension of the floor connecting beam (2) is greater than the width dimension of the hat shape.
The connection structure between the rail vehicle bolster and the floor according to claim 1, characterized in that: the outer end of the first folded edge (21) has an upward flange (23) to improve the floor connecting beam (2) stiffness.
The connection structure of the rail vehicle bolster and the floor according to claim 1, characterized in that: the bolster (1) is a box-shaped structure, and the upper cover plate (11) at the top thereof protrudes rearward from the web (12). ), the protruding part is provided with a threaded hole, the first folded edge (21) of the floor connecting beam (2) falls on the protruding part, and the first folded edge (21) is provided with an oblong hole along the direction of the vehicle length. The fastener passes through the oblong hole to fasten the first folded edge (21) and the upper cover plate (11) of the corbel (1).
The connection structure between the rail vehicle bolster and the floor according to claim 5, characterized in that: both ends of the floor connecting beam (2) are provided with sealing plates, and the sealing plates are connected to the upper cover plate (11) of the bolster (1). welding.
The connection structure between the rail vehicle corbel and the floor according to claim 1, characterized in that: the wave trough in front of the corrugated floor (3) is welded with the second folded edge (22), and the front end face of the corrugated floor (3) is connected to the U-shaped The rear elevation (24) of the section (20) is welded.
A rail vehicle underframe structure, characterized in that it has the connection structure between the rail vehicle bolster and the floor according to any one of claims 1-7.
The rail vehicle underframe structure according to claim 8, further comprising a side beam (4) and a traction beam, and the rear end of the traction beam is connected to the sleeper beam (1).
A rail vehicle, characterized in that it has the connection structure between the rail vehicle corbel and the floor according to any one of claims 1-7.