CN2545050Y - Depressed center stand for well car for railway - Google Patents

Abstract

The utility model relates to a concave bottom frame for a railway concave bottom flat car. It includes a load beam 3, an end arm 2, and a center beam 1, and is characterized in that the end arm 2 of the concave chassis adopts a transition structure of an upper bending angle with an arc transition and a lower bending angle with a knuckle transition structure. When the length of the concave bottom frame is constant, the length of the bearing surface can be increased. Since the upper corner adopts a large circular arc transition, the stress distribution is uniform, and the height of the section can be increased. Under compressive stress, the welding requirements are relatively low, so that the manufacturing difficulty is relatively reduced. It combines the advantages of two kinds of concave chassis, full arc transition and full angle transition, with light weight and can be assembled in sections. The utility model is beneficial to reduce the dead weight of the vehicle and improve the transport capacity of the vehicle; it is beneficial to reduce the height of the bearing surface of the vehicle and make full use of the limited space for transportation; it is beneficial to simplify the process, facilitate manufacturing and improve product quality.

Description

Concave chassis for railway concave bottom flat cars

technical field

The utility model relates to a concave bottom frame for a railway concave bottom flat car. It is a key component of a railway concave-bottomed flat car.

Background technique

At present, there are only two structural types of the concave bottom frame structure of the railway concave bottom flat car in my country: full circular arc transition and full knuckle transition. The full-arc transition concave chassis is a traditional structure used in the design of concave-bottom flat cars in my country, but its self-weight is relatively large, and the transition arc of the downward bending angle is small, resulting in stress concentration; because the structure is welded by multi-layer arc plates, the process The performance is poor, and the large welding wheel needs to be turned over when assembling, the welding deformation is not easy to control, and the structural size of the concave chassis is difficult to guarantee. The full-angle transition concave chassis can increase the length of the bearing surface when the length of the concave chassis is constant, and can be assembled in sections, which simplifies the assembly process and facilitates manufacturing, but the stress distribution at the corners is uneven. The weight is heavy; the upper-bend cross structure mainly bears the tensile stress, the welding quality requirements are very strict, and the welding is difficult.

Contents of the invention

The utility model combines the advantages of the above-mentioned two forms of full-arc transition and full-knuckle transition, and provides a concave chassis with an upper-bend arc transition and a lower-bend knuckle transition. When the length of the concave bottom frame is constant, the length of the bearing surface can be increased; since the upper bending angle adopts a large arc transition, the stress distribution is uniform, and the section height can be increased. It is simple and can greatly reduce the weight; the lower bending angle adopts the knuckle structure. Since this part is mainly subjected to compressive stress and the welding requirements are relatively low, the manufacturing difficulty is relatively reduced. The concave bottom frame structure combines the advantages of the other two concave bottom frames. It is light in weight and can be assembled in sections. Unfavorable factors such as difficulty in assembly solve the problems of high welding quality requirements, uneven stress distribution, insufficient material utilization, and heavy weight when the full knuckle is transitioned. The technical scheme of the utility model is: the concave bottom frame includes load beams, end arms, center plate beams, etc., and is characterized by a concave bottom frame composed of end arms and load beams, and the curved part of the end arms adopts an upper curved arc Transition, the structure of the corner transition of the lower corner. That is to say, the concave chassis is composed of two end arms with an upper curved corner with arc transition and a lower curved corner with a knuckle transition, and two center plate beams combined with a load beam.

In summary, the utility model provides a concave bottom frame, because it adopts a concave bottom structure with an upper curved corner arc transition and a lower curved corner knuckle transition, it overcomes the full arc transition concave bottom frame and the full knuckle transition concave bottom frame. The defects in the bottom frame improve various performances of the concave bottom frame. The concave underframe of this form is beneficial to reduce the dead weight of the vehicle and improve the transportation capacity of the vehicle; it is beneficial to reduce the height of the vehicle bearing surface and make full use of the limited space for transportation; it is beneficial to simplify the process, facilitate manufacturing and improve product quality.

Description of drawings

Fig. 1 is the main view structure schematic diagram of the utility model;

Fig. 2 is a top view structural diagram of the utility model.

Detailed ways

Referring to Fig. 1 and Fig. 2, the concave bottom structure of the upper bending angle arc transition and the lower bending angle transition of the concave bottom frame is composed of two end arms 2, two center plate beams 1 and a certain length bearing beam 3 It is assembled and welded, and the two center plate beams 1 are respectively connected with the upper ends of the two end arms 2, thus forming a complete, new type of concave underframe whose performance is superior to that of full arc transition and full knuckle transition. . The load-carrying beam 3 is welded into a double-box type fully enclosed structure by upper cover plate, lower cover plate, web plate and partition plate; The lower cover plate, web plate and partition plate are welded into a box-shaped structure; the center plate beam 1 is welded into a box-shaped structure by the upper cover plate, lower cover plate, and web plate.

Claims (1)

1, a kind of railroad well car concave bottom frame, comprise carrier bar (3), end arm (2), cartridge beam (1), it is characterized in that the described concave bottom frame that constitutes by end arm (2) and carrier bar (3), the last bent angle at the bent angle position of its end arm (2) is the arc transition structure, following bent angle is the bending angle transition structure, and described cartridge beam (1) is connected with end arm (2) upper end.