A high-speed railway freight car bogie

Abstract

The invention discloses a high speed railway wagon bogie which comprises a frame and a wheel set guide hanging device which is arranged below the fame. The wheel set guide hanging device comprises an axle assembly and a rotating arm assembly, the first end of the rotating arm assembly is arranged on a carriage axle of the axle assembly in a sleeved mode, the second end of the rotating arm assembly is connected with the frame, a primary spring is arranged between the first end and a side beam of the frame, and the primary spring comprises an outer ring spring and an inner ring spring which are embedded with each other. An ejection spring is further included and is arranged between the inner ring spring and the side beam, and the ejection spring has precompression amount in the process of empty dispatch. Thus, when a high speed railway wagon is in the working condition of empty dispatch, due to the fact that the ejection spring is arranged between the inner ring spring and the side beam of the frame and has the precompression amount, a restraint effect is achieved on the inner ring spring, vibration of the inner ring spring can be avoided, position offset or abrasion of the inner ring spring caused by vibration can be avoided, and therefore the operation performance of the high speed railway wagon in the working condition of empty dispatch and heavy vehicles can be improved.

Description

technical field [0001] The invention relates to the technical field of rail vehicle bogies, in particular to a high-speed railway freight car bogie. Background technique [0002] Railway freight car bogies are mostly three-piece bogies, and there are also a small number of welded frame bogies. These freight car bogies can meet the requirements of railway freight cars running at a speed of 120km / h. However, as my country's requirements for the quality and timeliness of material transportation are getting higher and higher, high-speed freight cars with a running speed of more than 200km / h will be one of the main development directions of my country's railway freight cars in the future. The bogie has become one of the research topics. [0003] Most of the existing reference designs are EMU bogies. Due to the difference between passenger cars and freight cars, EMU bogies cannot be directly applied to high-speed freight cars. For example, the connection between the existing EMU ...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing reference designs are EMU bogies. Due to the differences between passenger cars and freight cars, EMU bogies cannot be directly applied to high-speed freight cars.

For example, the connection between the bogie of the existing EMU and the car body is usually connected by a bolster or a draw pin. However, the use of a bolster connection will increase the center of gravity of the vehicle and cannot meet the dynamic performance requirements of the truck bogie. In the connection structure of the traction pin, since the transverse stop seat is arranged on the tapered pin body of the traction pin, the bending moment on the root of the tapered pin body increases, resulting in the connection between the root of the tapered pin body and the traction pin seat and the vehicle body. Deterioration of the stress state at the position reduces the reliability of the connection between the traction pin and the vehicle body, thereby affecting the safety and reliability of the vehicle operation

[0004] And existing railway freight car bogie also can't directly be used for high-speed railway freight car, as, the first series spring of railway freight car bogie adopts two-stage rigidity spring more at present, comprises the outer coil spring and the inner coil spring of mutual nesting, when railway freight car In the empty working condition, only the outer coil spring is loaded. When the railway freight car is in the heavy vehicle working condition, the inner coil spring is loaded or the inner coil spring and the outer coil spring are jointly loaded, so that the railway freight car is in the empty and heavy vehicle working conditions. large vertical deflection

[0005] However, the inner coil springs of the above-mentioned series of springs are not constrained. When the railway freight car is in an empty condition, only the outer coil spring bears the load, while the inner coil spring will vibrate. , the vibration of the inner coil spring will be intensified, which will not only cause the position of the inner coil spring to shift, but also cause wear and tear, which will not only affect the running performance of the railway freight car under the empty working condition, but also affect the running performance of the railway freight car under the heavy working condition

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