Structure and method for connecting underframe equipment bay and vehicle body

Abstract

The invention discloses a structure and a method for connecting an underframe equipment bay and a vehicle body. A bracket-free suspension way is adopted, the underframe equipment bay is supported by a static frictional force produced between an equipment bay mounting beam and a vehicle body underframe edge beam, an externally-protruded bracket is not required to be arranged on an vehicle body underframe, and the heavy equipment bay is arranged by a simplified positioning structure, so that difficulties in the design of rigidity and strength of the vehicle body underframe are reduced and the cost of parts of the vehicle body is reduced. The structure for connecting the underframe equipment bay and the vehicle body comprises the mounting beam connected with the underframe equipment bay, wherein the mounting beam is fastened on the vehicle body underframe edge beam by connecting bolts; the tightening torque of 150 to 200 Nm is applied to the connecting bolts on the vehicle body underframe edge beam; and a layer of base plate is backed between the mounting beam and the vehicle body underframe edge beam. The sufficient static frictional force is produced between the mounting beam and the vehicle body edge frame by applying the relatively higher tightening torque to the connecting bolts to support the underframe equipment bay.

Description

Technical field [0001] The invention relates to a connection structure and method between an underframe equipment compartment and a car body, specifically a connection structure and method without bracket suspension during the installation and positioning process of the underframe equipment compartment of a rail vehicle, and belongs to mechanical manufacturing field. Background technique [0002] At present, high-speed rail vehicles designed and used in China, such as urban light rail, subways, EMUs, and passenger trains, all have their undercarriage equipment compartments suspended and positioned by convex brackets on the underframe of the car body, supplemented by other tight Solid installation structure. [0003] The existing bracket type suspension positioning system and method require a certain amount of space for the bracket, and since the equipment compartment containing the equipment under the vehicle weighs about 10 tons, the bracket structure itself requires strict rigid...

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Problems solved by technology

[0003] The existing bracket-type suspension positioning system and method require a certain space to be reserved for the bracket, and because the equipment compartment for accommodating the equipment under the vehicle weighs about 10 tons, the bracket structure itself requires strict rigidity and strength design Requirements, for the installation and positioning of equipment under the vehicle, it poses high technical difficulty and component cost

[0004] In addition, the installation and positioning structure of the existing under-car equipment increases the volume and weight of the underframe, which is not conducive to improving the air resistance when the rail vehicle is running, and also affects the lightweight design of the underframe of the car body, which is not conducive to improving the operation of the rail vehicle. speed

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