Vehicle Bumper Impact-Absorbing Guide and Movable Piece Mechanism
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Solution Overview
Problem
Existing impact-absorbing devices for vehicles face challenges in effectively reducing impacts on both objects with low rigidity and vehicle occupants, particularly in terms of determining the optimal cross-sectional shape for the impact-cushioning member and improving assembly and manufacturing costs.
Innovation Solution
The impact-absorbing device comprises an impact-absorbing guide piece and a movable piece that deform to absorb impacts, with the movable piece moving along the guide piece to generate kinetic and frictional energy, effectively dispersing and redirecting the impact load, and featuring a helically wound external peripheral element to enhance absorption characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the cross-sectional shape of the impact-cushioning member is designed to deform under relatively small impact, then impacts on objects with low rigidity are cushioned, but it becomes difficult to determine the optimal shape and the member cannot effectively reduce impacts on vehicle occupants
Solution Approach 1:
The impact-cushioning member is divided into multiple movable pieces that can independently deform and move along the guide piece. This segmentation allows different portions of the member to respond to different impact scenarios, enabling effective cushioning for both low-rigidity objects and vehicle occupants through coordinated deformation of multiple segments
Solution Approach 2:
The movable pieces are designed to dynamically adjust their position and deformation along the guide piece based on impact conditions. The pieces can move freely along the guide piece and deform in response to applied forces, creating a dynamic system that adapts to different impact scenarios rather than relying on a fixed cross-sectional shape
2Reliability
If an impact-absorbing tube is bonded and fixed to the side portion of an impact-absorbing pad, then impact absorption capability is improved, but the member becomes relatively large and difficult to provide to the bumper beam
Solution Approach 1:
The movable pieces are nested within the guide piece structure, with each movable piece fitting along the length of the guide piece. This nested arrangement allows multiple impact-absorbing elements to be compactly integrated within a confined space, maintaining high impact absorption capability while minimizing the overall volume of the member for easy integration into the bumper beam
Solution Approach 2:
Instead of expanding the member in lateral dimensions by bonding a tube to a pad, the invention utilizes the lengthwise dimension of the guide piece to accommodate multiple movable pieces. This dimensional reorganization allows the impact-absorbing functionality to be distributed along the length of the member, achieving high reliability without increasing the cross-sectional area
3Reliability
If an impact-absorbing tube and impact-absorbing pad are separately provided and bonded together, then impact absorption is enhanced, but assembly and manufacturing costs increase
Solution Approach 1:
The guide piece and movable pieces are designed as integrated components that can be manufactured as a single unit or pre-assembled in a simplified manner. The movable pieces are configured to fit along the guide piece without requiring complex bonding operations, reducing manufacturing steps and costs while maintaining enhanced impact absorption capability through the coordinated deformation of multiple pieces
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the overall impact-absorbing ability without causing a 'bottom-hitting' condition, efficiently absorbs impacts on both low-rigidity objects and vehicle occupants, and can be compactly integrated into vehicle bumpers with reduced assembly and manufacturing costs.
Implementation Method 1
the movable piece is moved along the lengthwise direction of the guide piece when an impact has acted on the movable piece, and the guide piece and the movable piece are caused to deform to thereby absorb the impact
Implementation Method 2
the movable piece moving along the guide piece to generate kinetic and frictional energy
Implementation Method 3
the guide piece and the movable piece are caused to deform to thereby absorb the impact
Data Source
AI summary
An impact-absorbing device that absorbs impact force when a collision has occurred with an object having relatively low rigidity. The impact-absorbing device is provided with a guide piece that extends in a horizontal direction substantially horizontal to the input direction of the impact, and a movable piece that is movably supported along the guide piece. The guide piece and movable piece deform to absorb impact force when the impact force has acted on the guide piece.