Internal combustion CRH train

Abstract

The invention relates to the field of railway vehicles, in particular to an internal combustion CRH (China Railway Highspeed) train. The train comprises a vehicle body and a bogie, a chassis of the vehicle body comprises a front-end bottom frame, a middle bottom frame and a rear-end bottom frame, the middle bottom frame comprises a first door area and a second door area which are connected througha pair of boundary beams, the pair of boundary beams are disconnected in the first door area and the second door area respectively to reserve a door area space, and a boarding step reinforcing structure is installed in the door area space; the first door area is connected with the front-end bottom frame and is provided with a door area reinforcing structure, and the second door area is connectedwith the rear-end bottom frame and is provided with a power pack hanging structure; a buffer beam is installed at the end, away from the middle bottom frame, of the front-end bottom frame, the two ends of the buffer beam are connected to the front ends of the pair of side beams respectively, and a beam body of the buffer beam protrudes in the direction opposite to the middle bottom frame to form an arc-shaped curved surface structure. The problems that the bearing capacity of the bottom frame is insufficient, the structural strength is not high and the welding amount of the bottom frame at thefront end is large due to stress concentration caused by the fact that an existing middle bottom frame boundary beam is broken in a door area are solved.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to an internal combustion multiple train set. Background technique [0002] The underframe of a rail vehicle is used to carry the traction force of the car body and the bogie. In order to realize the overall load bearing of the car body structure, the underframe needs to transmit the longitudinal traction force, passenger gravity and equipment gravity evenly to the side beams, and then transmit to the side wall to realize the overall bearing of the car body structure. The underframe of the existing rail vehicle is generally formed by connecting the front end underframe, the middle underframe and the rear end underframe, wherein the rail vehicle is constructed with a first door area and a second door area at the two ends of the middle underframe, so as to facilitate Passengers get on and off. [0003] In the existing middle underframe, in the first door area and the second do...

AI Technical Summary

Problems solved by technology

For this reason, the present invention proposes a diesel multiple unit to solve the problem of insufficient undercarriage bearing capacity and low structural strength caused by the stress concentration caused by the disconnection of the side beam of the existing middle underframe in the door area, and the welding of the front end underframe. volume problem

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