Hopper Car Sidewall Structure with Integrated Side Columns

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Solution Overview

Problem

The existing sidewall structure of railway coal hopper cars has inefficiencies in space utilization and increased weight and cost due to rivet holes and the arrangement of side columns on the outer car body, which also complicates assembly.

Innovation Solution

An integrally formed sidewall structure with built-in side columns and a panel-column design that eliminates rivet holes, using aluminum alloy materials for the upper and lower side beams and panels, and a modular assembly approach that simplifies the car body's integral structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If side columns are arranged at the outer side of the car body, then the structural strength is improved, but the space utilization rate is reduced

Engineering Contradiction:

Improvestructural strengthVSAvoidspace utilization rate

Core Design Contradiction:

StrengthVSVolume of moving object

Solution Approach 1:

The side columns are nested within the car body structure rather than being externally arranged. The side columns are positioned inside the car body walls, with the wall panels forming the outer surface, thereby utilizing the internal space efficiently while maintaining structural strength.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Strength

If side columns are connected to sidewall panels using numerous rivets, then the connection strength is improved, but the weight and cost are increased

Engineering Contradiction:

Improveconnection strengthVSAvoidweight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The side columns and wall panels are merged into an integral structure through welding, eliminating the need for numerous rivets. The side columns are welded directly to the wall panels, creating a unified component that reduces weight while maintaining connection strength.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mechanical rivet connection system is replaced with a welding connection system. Welding provides stronger and more reliable connections without the weight penalty of numerous rivets, while also eliminating the need for rivet heads that could create coal accumulation points.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Strength

If side columns are connected to sidewall panels using numerous rivets, then the connection strength is improved, but the cost is increased

Engineering Contradiction:

Improveconnection strengthVSAvoidcost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The side columns and wall panels are merged into an integral structure through welding, eliminating the need for numerous rivets. This integration reduces material costs (no rivets needed) and manufacturing complexity while maintaining connection strength.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mechanical rivet connection system is replaced with a welding connection system. Welding is generally more cost-effective than using numerous rivets, as it eliminates the need for rivet materials, reduces assembly steps, and provides superior connection strength.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Strength

If side columns are arranged at the outer side of the car body, then the structural strength is improved, but the assembly complexity is increased

Engineering Contradiction:

Improvestructural strengthVSAvoidassembly complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The side columns are nested within the car body structure rather than being externally arranged. This nested arrangement simplifies the assembly process as the side columns become integral parts of the car body structure, reducing the number of separate components that need to be assembled.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The side columns and wall panels are merged into an integral structure through welding. This integration simplifies assembly by reducing the number of separate components and connection points, while the welded joints provide strong structural connections.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS10053118B2Sidewall structure of hopper car

Publication Date: 2018.08.21 CRRC YANGTZE CO LTD

AI summary

The present invention discloses a sidewall structure of a hopper car, including: an integrally formed upper side beam (1), an integral sidewall panel (2), an integrally formed lower side beam (3) and a lower sidewall (4), wherein the upper side beam (1) is riveted with the integral sidewall panel (2) at the lower side; the sidewall panel (2) is riveted with the integrally formed lower side beam (3) at the lower side; the sidewall panel is of a panel-column structure in which the wall panel is integrated with a side column, and the side column is arranged at the inner side of the car body; the lower side beam (3) is riveted with the lower sidewall (4) at the lower side. According to the sidewall structure of the hopper car provided by the present invention, because of the sidewall panel with the integrally built-in side columns, the strength reduction resulting from rivet holes is avoided, the increased weight and cost resulting from rivets are avoided as well, and since the side columns are built-in, the spaces between the side columns are utilized to increase the volume of the car body.