Coupler knuckle and hook for rail vehicles

Abstract

The invention relates to a coupler knuckle and a hook for rail vehicles. The coupler knuckle comprises a coupler knuckle nose and a coupler knuckle body, wherein a pin hole is formed in the head of the coupler knuckle body; the coupler knuckle nose is rotatably connected with the coupler knuckle body through a coupler knuckle pin which penetrates through the pin hole; the coupler knuckle is a forging piece; a first through hole is formed in the tail of the coupler knuckle body in the axial direction of the coupler knuckle body; the first through hole is communicated with the pin hole to form aT-shaped cavity. Through the adoption of the coupler knuckle for rail vehicles disclosed by the invention, the load intensity of the coupler knuckle can be effectively improved, and the safety of therail train is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of vehicles, in particular to a hook and a coupler for rail vehicles. Background technique [0002] With the development of heavy-load transportation of railway freight cars, the axle load and the number of railway freight cars are continuously increasing, and the operating speed is also increasing. The load conditions of the railway freight car's knuckles have become more severe. They continue to bear alternating loads, and the knuckle cracks and fracture accidents gradually Increase, therefore, higher requirements for the strength of the hook. [0003] In the prior art, the knuckle is a cast knuckle, the casting quality and wall thickness of the inner cavity structure are difficult to control, the knuckle structure is low in strength, and the static load tensile test limit load can only reach 3000kN. At the same time, casting defects such as blisters, shrinkage holes, and porosity are unavoidable in cast knuckle...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the knuckle is a cast knuckle, the casting quality of the inner cavity structure and the structural wall thickness are difficult to control, the structural strength of the knuckle is low, and the ultimate load of the static load tensile test can only reach 3000kN

At the same time, cast knuckles inevitably have casting defects such as trachoma, shrinkage cavity, and shrinkage porosity. Therefore, with the continuous increase in the running speed and traction tonnage of railway wagons, these defects become the source of fatigue cracks in use, making the cast knuckle in use. The accidents of medium cracks and fractures are gradually increasing, the fatigue reliability is low, and the service life is short, which affects the safety of train operation

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