Christmas Tree Stand Clamping Wheel With Ratchet Locking
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Solution Overview
Problem
Existing Christmas tree stands with clamping devices are complex, expensive, and prone to failures due to intricate mechanisms and high maintenance requirements, particularly in terms of clamping and tensioning systems.
Innovation Solution
A stand design featuring a drive wheel directly integrated with the rotatable clamping body, eliminating the need for a tensioning lever, and utilizing a ratchet mechanism with a spring-loaded pawl for locking and easy operation, allowing for foot-activated tensioning and release with a simple, cost-effective construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tensioning lever with ratchet mechanism is used to actuate the clamping body, then the clamping position can be locked reliably, but the device complexity increases and manufacturing costs rise
Solution Approach 1:
The patent removes the complex tensioning lever and ratchet mechanism from the system. Instead, it uses a simple winch drum that can be rotated directly by foot, eliminating the need for intermediate levers and locking mechanisms while maintaining reliable clamping through direct mechanical advantage
Solution Approach 2:
The winch drum is designed to be operated directly by foot pressure, allowing the user to clamp and release the tree trunk without any additional levers or complex mechanisms. The system serves itself through direct human application of force to the drum
2Force
If a tensioning lever with ratchet mechanism is used to actuate the clamping body, then the clamping force can be maintained, but the ease of operation decreases due to multiple components
Solution Approach 1:
The patent eliminates the tensioning lever and ratchet components, replacing them with a simple winch drum that provides mechanical advantage through its drum geometry. The user applies force directly to the drum with their foot, simplifying the operation while maintaining sufficient clamping force through the winch mechanism
3Ease of operation
If intermediate levers are used to engage holding elements, then the clamping action can be achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes all intermediate levers from the system. The holding elements are directly connected to the winch drum through cables, eliminating the need for complex lever mechanisms. This simplifies both manufacturing and assembly while maintaining the clamping function
Solution Approach 2:
The patent combines the functions of multiple components (levers, cables, holding elements) into a simpler system where cables directly connect the winch drum to the holding elements. This merging reduces the number of parts and simplifies the overall structure
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 solution provides a reliable, easy-to-use, and cost-effective clamping mechanism that reduces wear and tear, ensuring secure clamping and easy release with minimal operational force, while maintaining a compact and integrated design.
Implementation Method 1
a spring-loaded pawl for locking and easy operation
Implementation Method 2
a spring-loaded pawl for locking and easy operation
Implementation Method 3
utilizing a ratchet mechanism with a spring-loaded pawl for locking
Implementation Method 4
at least one flexible force transmission element that can withstand tensile loads
Data Source
Figure 1
Figure 2
AI summary
The tensioning device on a stand (2) for tensioning a rod-form component (3), especially a Christmas tree, includes a force transmission element (4) which by one end is wound on a rotatable tensioning component (5), wherein for operating the rotatable tensioning component, a drive wheel (7) is provided, the diameter of which is a multiple of the diameter of the rotatable tensioning component. The drive wheel shares with the rotatable tensioning component a common axis (18) and is connected to it in a torsionally fixed manner. An independent claim is included for a stand for tensioning a rod-form element, especially a Christmas tree, equipped with the proposed tensioning device.