Flexible framework with slewing bearing for railway vehicle bogie

Abstract

The invention discloses a flexible framework used for a railway vehicle bogie and provided with slewing bearings, the whole framework is H-shaped and is composed of two T-shaped beams and two sets of slewing bearings connecting the two T-shaped beams, each T-shaped beam is composed of a beam extending in the longitudinal direction and a cross beam extending towards the middle in the transverse direction, and the two T-shaped beams are connected through the two sets of slewing bearings. The two sets of slewing bearings are coaxially arranged in the mode that the axes are parallel to cross beams of the T-shaped beams, the cross beams of the two T-shaped beams are hinged along a transverse shaft, the two T-shaped beams can freely rotate around the axes of the two slewing bearings through connection of the two sets of slewing bearings, and meanwhile the two T-shaped beams are connected in an approximately rigid mode in other directions. The bogie adopting the flexible framework has extremely low torsional rigidity, so that the bogie can adapt to line irregularity to the greatest extent and ensure the stability, the cross beams of the two T-shaped beams of the framework are each of an upper-side opening structure, and a center traction device between the cross beams and a vehicle body can be arranged, so that the bogie adapts to a short wheelbase and is beneficial to installation of a driving device; and the compact and light-weight design of the bogie is realized.

Description

technical field [0001] The invention relates to the technical field of bogies, in particular to a flexible frame using slewing bearings for rail vehicle bogies. Background technique [0002] Existing railway bogies are mainly integral frame type and three-piece type bogie. The integral frame type bogie can eliminate rhomboid deformation, but its ability to adapt to line distortion is poor, and it needs to rely on a series of soft vertical deformation to adapt to line distortion. , The requirements for the primary suspension and track are high, and the three-piece bogie has a strong ability to adapt to line twisting, but its structure is loose, its anti-diamond stiffness is small, and its running speed is low. [0003] The existing partially flexible monolithic frame can reduce the torsional stiffness between two side beams, which is mainly realized by rubber joints or thin steel beams. For the flexible frame with rubber joints, the rubber joints can withstand a large torque...

AI Technical Summary

Problems solved by technology

For the flexible frame with rubber joints, the rubber joints can withstand a large torque, and the two side beams of the flexible frame with rubber joints can only rotate at a certain angle, and the free torsion between the two side beams cannot be realized; for the beams, thin steel plates are used. The flexible frame has a limited rotation angle between the two side beams and cannot freely rotate

For bogies whose side girders cannot be freely twisted, the line adaptability and curve passing ability are limited

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