Shift Lever Bracket Flat Plate Design for Weight Reduction
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Solution Overview
Problem
Conventional shift lever mounting brackets are difficult to process, heavy, and costly due to their cylindrical shape and thick metal construction, which complicates processing and increases weight and cost.
Innovation Solution
A shift lever mounting bracket designed with virtually flat vehicle-side and lever-side fixing plates, a connecting plate extending orthogonally between them, and bend parts to form a continuous flat plate structure, allowing for easier processing and higher strength while withstanding forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bracket is formed of a thick metal plate to withstand the load, then the strength is improved, but the weight increases and the cost becomes high
Solution Approach 1:
The bracket is divided into multiple functional plates (vehicle-side fixing plate, lever-side fixing plate, connecting plate) with different thicknesses and strengths. Each plate is optimized independently - the connecting plate can be thinner since it experiences distributed loads, while fixing plates have sufficient thickness for attachment strength. This segmentation allows weight reduction while maintaining overall bracket strength.
Solution Approach 2:
Different regions of the bracket have different thicknesses and material properties optimized for their specific functions. The connecting plate has uniform thickness optimized for its spanning function, while fixing plates have greater thickness for attachment purposes. Bend parts have localized reinforcement where stress concentration occurs. This local quality optimization reduces unnecessary material usage and weight.
2Strength
If the bracket is formed of a thick metal plate to withstand the load, then the strength is improved, but the processing difficulty increases
Solution Approach 1:
The bracket is designed as an assembly of multiple plates connected by bend parts, which can be manufactured separately and then assembled. This segmentation allows each component to be processed using simpler, more efficient methods rather than requiring complex processing of a single thick plate. The connecting plate, being thinner, is easier to process than a uniformly thick bracket would be.
Solution Approach 2:
The bracket uses a composite structure of multiple metal plates joined together, which can be manufactured using different processing methods optimized for each component. This composite approach allows use of thinner, easier-to-process materials while achieving the required overall strength through the assembled structure rather than requiring a single thick plate.
3Strength
If the bracket has a cylindrical container shape, then the strength is improved, but the processing difficulty increases
Solution Approach 1:
Instead of using a conventional cylindrical container shape that is difficult to process, the invention inverts the approach by using flat plates bent into shape. The connecting plate is a flat plate that is bent at its edges to form the bracket structure, which is easier to process than forming a cylindrical shape. This inversion from 3D forming to 2D bending significantly simplifies manufacturing.
Solution Approach 2:
The invention changes the geometric parameters of the bracket from a cylindrical 3D form to a planar 2D form with bent edges. The connecting plate maintains a fundamentally flat geometry with bend parts at the edges, which are easier to manufacture using sheet metal bending processes rather than requiring complex cylindrical forming operations. This parameter change from curved 3D to bent 2D simplifies processing.
Data Source
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AI summary
A shift lever mounting bracket 110 includes a vehicle-side fixing plate 161 having a virtually flat shape; a lever-side fixing plate 163 having a virtually flat shape; a connecting plate 162 having a virtually flat shape, and extending virtually parallel to both a direction orthogonal to the vehicle-side fixing plate 161 and a direction orthogonal to the lever-side fixing plate 163; a vehicle-side bend part 164 connecting a part of an edge of the vehicle-side fixing plate 161 with a part of an edge of the connecting plate 162; and a lever-side bend part 165 connecting a part of an edge of the lever-side fixing plate 163 and a part of the edge of the connecting plate 162. The entire shift lever mounting bracket 110 is constituted with a continuous flat plate.