Lightweight bogie area apron board mounting structure

Abstract

The utility model provides a light-weight bogie area apron board installation structure which comprises a connecting type rib, a supporting inclined rib, an apron board inner wall type rib, a reinforcing rib, a flow guide outer wall and an apron board inner wall, the connecting type rib is provided with an installation hole, and a bogie apron board structure and an underframe edge beam are fixed through a fastener. According to the utility model, the product performance is simultaneously improved, the running speed per hour is improved to 450km / h from the original 350km / h, and meanwhile, static load pressure of + / -3500Pa and fatigue requirements of 2 million times under the pressure of + / -2500Pa (the lowest safety factor reaches 4.69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, the lowest safety factor reaches 69, and the highest safety factor reaches 69, the lowest safety factor reaches 69, the highest fatigue damage is 0.512); the light-weight bogie apron board is formed by machining aluminum alloy sections, the strength of the apron board is effectively improved through internal section bar layout, and meanwhile redundant section bars are cut off to achieve weight reduction.

Description

Technical Field

[0001] The utility model relates to a rail transit vehicle body structure, in particular to a bogie region skirt plate mounting structure. Background Art

[0002] With the increasing development of rail transit, the speed level of high-speed EMUs is constantly increasing, and at the same time, higher requirements are put forward for the comfort of vehicle operation. Therefore, optimizing the flow-conducting performance of the vehicle body to achieve drag reduction, noise reduction and energy consumption reduction has become a development trend. In order to improve the flow-conducting performance of the train, the bogie outer skirt is installed along the contour line of the vehicle body in the exposed area on both sides of the bogie of the high-speed train. For details, see Figure 1 As shown; the existing scheme has unnecessary redundant structure, serial number a is the original skirt plate stainless steel mounting seat, serial number b is the original skirt plate mounting seat and skirt plate connecting bolt, which is not conducive to product lightweight and cost reduction and efficiency improvement, see Figure 2 described. Utility Model Content

[0003] In order to realize the integration, lightness and modularization of the product, the utility model improves the external skirt structure of the bogie area to achieve the indicators of reducing costs and operating energy consumption, while improving the safety performance of the product.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a lightweight bogie area skirt mounting structure, including connecting ribs, supporting oblique ribs, skirt inner wall ribs, reinforcing ribs, guide outer wall and skirt inner wall, the connecting ribs are provided with mounting holes for fixing the bogie skirt structure to the frame side beams through fasteners, the supporting oblique ribs are connected to the connecting ribs and are provided with skirt mounting avoidance holes, the skirt mounting avoidance holes are used for applying bolt torque with a torque wrench, the upper part of the skirt inner wall ribs are respectively connected to the supporting oblique ribs and the connecting ribs, the skirt inner wall ribs are located on the skirt inner wall and the bottom is contacted with the guide outer wall through a rounded transition, and reinforcing ribs are provided between the skirt inner wall ribs and the guide outer wall.

[0005] Furthermore, the number of the inner wall ribs of the skirt plate is at least 3.

[0006] Furthermore, there are three connecting ribs, skirt inner wall ribs and supporting oblique ribs in total, and the connecting ribs on both sides of the skirt structure are provided with mounting holes for fixing the bogie skirt structure to the chassis side beams through fasteners.

[0007] The utility model also improves product performance, increasing the operating speed from the original 350km / h to 450km / h, and can withstand a static load pressure of ±3500Pa and 2 million fatigue requirements under a pressure of ±2500Pa (the minimum safety factor reaches 4.69, and the maximum fatigue damage is 0.512); the lightweight bogie skirt is made of aluminum alloy profiles, and the internal rib layout is used to effectively improve the skirt strength, while redundant ribs are removed to achieve weight reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 For the bogie skirt area;

[0009] Figure 2 Install the structure for the original skirt board;

[0010] Figure 3 This is the front view of the skirt plate structure of the utility model;

[0011] Figure 4 It is a side view of the skirt plate structure of the utility model;

[0012] Figure 5 This is an axonometric diagram of the skirt plate structure of the utility model;

[0013] Figure 6 It is a cross-sectional view of the skirt board installation structure of the present utility model.

[0014] In the figure: 1-connecting ribs; 2-supporting oblique ribs; 3-reinforcing ribs; 4-outer flow guide wall; 5-inner wall of skirt board; 6-ribs on inner wall of skirt board; 7-skirt board structure; 8-side beam of base frame; 9-avoidance hole for skirt board installation; 10-cut-off rib area; 11-fasteners. DETAILED DESCRIPTION

[0015] A bogie region integrated, lightweight skirt structure is designed and developed. The new bogie skirt structure 7 is connected to the chassis side beam 8 by fasteners 11. When the skirt structure 7 is processed, the skirt inner wall ribs 6 of the skirt inner wall 5 are retained to improve and strengthen the overall stiffness of the skirt.

[0016] According to the characteristics of aerodynamic loads in vehicle operation and the connection structure limitations, a more targeted aluminum profile rib layout is designed. Figure 1 Middle: The dotted area is the bogie skirt area, which covers the outer contour of the car body to both sides of the bogie to achieve air diversion and drag reduction.

[0017] Figure 3 Middle: The dotted frame is the area where the ribs are retained.

[0018] Figure 4 , Figure 5 and Figure 6Middle: The connecting rib 1 serves as the main load-bearing interface of the bogie skirt structure, the supporting oblique rib 2 effectively improves the side aerodynamic load bearing capacity, the reinforcing rib 3 improves the overall mode of the skirt, the guide outer wall 4 follows the body contour to achieve aesthetic and guide effects, the skirt inner wall 5 improves the overall strength and mode of the skirt, the skirt installation avoidance hole 9 is located on the supporting oblique rib 2 for the torque wrench to apply the bolt torque, the rib area 10 is removed from the skirt inner wall 5, and the skirt inner wall rib 6 is retained. When cutting, the original rib root length of 9mm is retained to improve the stiffness of the skirt, and the right angles between the skirt inner wall 5 and the guide outer wall 6 and the reinforcing rib 3 are processed with rounded corners to avoid stress concentration.

[0019] Compared with the original bogie skirt plate, the weight is reduced by 48%, the cost is reduced by 30%, and the modal is increased to 69.9Hz. The stainless steel mounting seat of the original skirt plate has been cancelled and replaced with integrated ribs to achieve "weight reduction and cost reduction". The connecting bolts of the original skirt plate mounting seat have been cancelled and replaced with integrated ribs to reduce the number of connecting bolts and reduce the risk factor of product loosening. A non-welded structure is adopted to eliminate the influence of the welding heat affected zone and increase the strength by 50%.

Claims

1. A lightweight bogie area skirt plate mounting structure, characterized in that: It includes connecting ribs, supporting oblique ribs, skirt inner wall ribs, reinforcing ribs, guide outer wall and skirt inner wall. The connecting ribs are provided with mounting holes to fix the bogie skirt structure to the chassis side beams through fasteners. The supporting oblique ribs are connected to the connecting ribs and are provided with skirt installation avoidance holes. The skirt installation avoidance holes are used for torque wrenches to apply bolt torque. The upper part of the skirt inner wall ribs is respectively connected to the supporting oblique ribs and the connecting ribs. The skirt inner wall ribs are located on the skirt inner wall and the bottom is transitioned through a fillet at the contact point with the guide outer wall. Reinforcing ribs are provided between the skirt inner wall ribs and the guide outer wall.

2. A lightweight bogie region skirt plate mounting structure according to claim 1, characterized in that: The number of the inner wall ribs of the skirt plate is at least 3.

3. A lightweight bogie region skirt plate mounting structure according to claim 1, characterized in that: There are three connecting ribs, skirt inner wall ribs and supporting oblique ribs in total. The connecting ribs on both sides of the skirt structure are provided with mounting holes for fixing the bogie skirt structure to the chassis side beams through fasteners.

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