Cast Holding Structure for Stiff Battery Mounting Under Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mounting structures for large components in vehicles, such as electric truck batteries, face challenges in decoupling from the vehicle frame to prevent vibrations while maintaining structural integrity and design freedom, often requiring large elastomer bearings that lead to inefficiencies in bending and torsional stiffness.
Innovation Solution
A holding structure with a receiving eye, fixing points, and walls arranged to allow for high flexural and torsional stiffness, manufactured cost-effectively through casting, featuring cavities and ribs to distribute loads efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large-diameter elastomer bearings are used to compensate for large displacements, then vibration compensation capability is improved, but mounting eye size increases and structural weight increases
Solution Approach 1:
The mounting structure is divided into functional segments: elastomer bearings for vibration compensation, mounting eyes for connection, and a bearing mounting structure as an intermediate element. This segmentation allows each component to be optimized independently, enabling the use of appropriately sized bearings without requiring oversized mounting eyes throughout the entire structure.
Solution Approach 2:
The patent introduces a third dimension by adding a bearing mounting structure as an intermediate element between the elastomer bearing and the vehicle frame. This additional structural layer distributes loads more efficiently and provides design freedom in geometric arrangement, allowing vibration compensation without proportionally increasing overall structure weight.
2Strength
If as much material as possible is concentrated in the plane perpendicular to the through-holes to achieve high bending stiffness, then bending stiffness is improved, but torsional stiffness decreases due to deflection and twisting
Solution Approach 1:
The bearing mounting structure features local quality variations with different wall thicknesses and material distributions in different regions. The structure has optimized material concentration in areas requiring bending resistance while maintaining adequate torsional rigidity through strategically placed thicker sections and rib reinforcements.
Solution Approach 2:
The bearing mounting structure can be manufactured as a composite component combining different materials or material densities in different regions, allowing simultaneous optimization of bending and torsional stiffness properties through material composition rather than uniform material distribution.
3Adaptability or versatility
If special bearing mounting structures are used to achieve greater design freedom in geometric arrangement, then design freedom is improved, but structural complexity increases
Solution Approach 1:
The bearing mounting structure is designed as a universal component that can accommodate different elastomer bearing sizes, positions, and orientations. The standardized mounting interface and geometric flexibility allow the same basic structure type to serve multiple mounting configurations, reducing overall system complexity despite increased design freedom.
Data Source
Figure 1a
Figure 1c~1b1
Figure 1f~1b2
AI summary
A holding structure (2a, 2b, 2c) is proposed, comprising at least one receiving eye (4, 6) having a central receiving axis (A4, A6), at least two fixing points (12, 14, 16, 18) each having a fixing axis (A12, A14, A16, A18) running parallel to the at least one receiving axis (A4, A6), a first wall (8) and a second wall (10) arranged on opposite sides of the holding structure (2a, 2b, 2c), wherein the two walls (8, 10) are spaced apart in the direction of the at least one receiving axis (A4, A6), wherein the at least one receiving eye (4, 6) extends from one of the walls (8, 10) to the other wall (8, 10), and wherein the holding structure (2a, 2b, 2c) also has at least one cavity (H1, H2, H3, H4) which is arranged between the walls (8, 10).