Skateboard Deck with Segmented Composite Structure
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Solution Overview
Problem
Current skateboards are prone to breaking due to internal stresses during use, particularly at the connection between the trucks and the board, and are vulnerable to water infiltration, leading to a shortened service life and fragility, especially during competitive jumps and figures like slides and blunt-slides.
Innovation Solution
A skateboard design featuring a composite board with integrated receiving means for wheel supports, utilizing a pin-based ball joint connection and elastomer elements to distribute forces, and a core with higher-density reinforcement inserts for enhanced mechanical resistance and durability, along with a non-skidding upper surface for improved traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the board is pierced through with screws at 2x4 points for truck attachment, then the trucks can be securely attached to the board, but the mechanical resistance of the board is reduced and preferred breaking zones are created
Solution Approach 1:
The board is divided into a top layer and a bottom layer that are not completely贯通 (penetrated) by the screws. The screws only pass through the top layer and are stopped by the bottom layer, which remains intact. This segmentation prevents the board from being weakened by complete穿透 holes while still allowing secure attachment of the trucks.
Solution Approach 2:
The attachment mechanism is moved from a single-plane penetration approach to a multi-layer approach where the bottom layer acts as a stopping barrier. This dimensional change in the attachment structure prevents through-holes that would create breaking zones while maintaining attachment strength.
2Weight of moving object
If the board is made lighter to meet user requirements, then the skateboard is easier to maneuver, but the mechanical characteristics and resistance to breaking are reduced
Solution Approach 1:
The board uses a composite structure with a top layer made of light material (such as aluminum or plastic) and a bottom layer made of stronger, heavier material. This composite construction allows the board to remain lightweight for easy maneuvering while the stronger bottom layer provides the necessary mechanical resistance and prevents breaking.
3Adaptability or versatility
If the stationary part of the truck is designed as rectangular for standardization, then the connection between truck and board is standardized, but the board breaks along the edges of the rectangular truck part
Solution Approach 1:
The stationary part of the truck is designed with rounded corners instead of sharp rectangular edges. This curvature eliminates the stress concentration points that would otherwise cause the board to break along the edges, while still maintaining the standardized connection interface between the truck and board.
4Strength
If screws pass through the entire thickness of the board for truck attachment, then the trucks are firmly attached, but water can infiltrate through the openings and shorten the service life of the plywood
Solution Approach 1:
The board structure is segmented into top and bottom layers that are not completely贯通 by the screws. This segmentation creates a barrier that prevents water from infiltrating through the attachment holes, while still allowing the trucks to be firmly attached to the top layer of the board.
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
The design reduces the likelihood of breaking zones, increases the board's weight for better stability, and facilitates the execution of complex figures by distributing forces effectively and providing improved mechanical characteristics, while also protecting against water infiltration.
Implementation Method 1
elastomer elements to distribute forces
Implementation Method 2
a pin whose tip is housed in a recess so as to create a connection that is essentially equivalent to a ball joint
Data Source
AI summary
A skateboard that includes a board (12) with an upper part (30) and a lower part (34), wheel supports (14), as well as elements (28) for orientation of the wheel supports (14), whereby the elements (28) for orientation include a pin (52) whose tip (54) is housed in a recess so as to create a connection that is essentially equivalent to a ball joint; the skateboard is characterized in that in its lower part (34), it includes receiving elements (58) that are manufactured with the board (12) and are able to accommodate each wheel support (14).