Weight Training Sled Center of Gravity Adjustment
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Solution Overview
Problem
Existing weight training sleds lack the ability to adjust the position of the loading weight's center of gravity, limiting the variety of muscle training experiences and intensities.
Innovation Solution
A weight training sled with a main frame, rotatable wheels, a damping structure, an operating handle, an auxiliary push frame, an enhanced weight load holder, and a weight member that can be positioned to vary the center of gravity of the load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the loading weight position is fixed on the slide plate, then the structure is simple, but the center of gravity cannot be adjusted, limiting training variety
Solution Approach 1:
The loading weight system is segmented into multiple independent weight members that can be separately positioned. Each weight member can be independently placed at different locations on the main frame, allowing the center of gravity to be adjusted in discrete steps along the longitudinal axis without requiring a complex continuous adjustment mechanism.
Solution Approach 2:
The weight loading system transitions from a static fixed position to a dynamic adjustable configuration. The weight members can be moved along the longitudinal direction of the main frame to different positions, enabling the center of gravity to be dynamically adjusted according to training requirements while maintaining structural simplicity.
2Reliability
If friction between slide board and ground is used for resistance, then weight training effect is achieved, but frictional wear occurs making it unsuitable for indoor use
Solution Approach 1:
The direct friction-based resistance mechanism is replaced with a wheel-based rolling resistance system. Instead of the slide board directly contacting and frictioning against the ground, wheels are introduced to convert sliding friction into rolling motion, significantly reducing wear on both the equipment and flooring while maintaining the resistance training effect through the damping structure.
Solution Approach 2:
Wheels are introduced as intermediary elements between the slide board and the ground. These wheels serve as a mediator that transfers the propulsion force while minimizing direct contact and frictional wear between the main frame and the floor surface, enabling indoor use without damaging flooring.
3Force
If wheels with damping structure are added, then resistance source is enhanced, but device complexity increases
Solution Approach 1:
The damping function is merged with the wheel structure itself rather than being a separate component. The damping structure is integrated into the wheel assembly, combining the rolling motion function with the resistance generation function in a single unified component, thereby enhancing the resistance effect without proportionally increasing overall device complexity.
Solution Approach 2:
The wheel assembly is designed to serve multiple functions simultaneously: it provides the rolling motion mechanism for movement, generates resistance through the damping structure, and supports the main frame. This multi-functionality reduces the need for separate components and helps manage device complexity while enhancing the resistance effect.
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 sled allows users to change the center of gravity of the loading weight, enhancing the variety of muscle training experiences and intensities, thus providing a more practical and effective weight training solution.
Implementation Method 1
a damping structure, disposed on the main frame and connected to the second wheel to provide a damping effect to retard the rolling of the second wheel
Implementation Method 2
The slide board is additionally configured with four wheels. The movement of the wheels of the slide board can solve the problem of frictional wear of the slide board and the ground
Implementation Method 3
When the user pushes or pulls the slide board, the friction between the slide board and the ground will generate a resistance so as to realize the purpose of weight training
Data Source
AI summary
A weight training sled with enhanced load effect is disclosed. The main frame has a first end and a second end remote from each other. Two first wheels, in a rotatable state, disposed at either side of the first end. A second wheel, in a rotatable state, disposed at the second end. The damping structure, disposed on the main frame and connected to the second wheel. An operating handle, erected at the first end of the main frame. An auxiliary push frame, erected at the second end of the main frame with a stand portion and a handlebar portion coupled to the upper end of the stand portion. An enhanced weight load holder, disposed on the handlebar portion, including a stop portion spaced from the handlebar portion, forming a handgrip clearance space. A weight member, placed on the enhanced weight load holder and limited in position by the stop portion.