Mobile Stand Locking Mechanism for Stable Heavy Object Support
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Solution Overview
Problem
Existing mobile stands for heavy objects, such as umbrellas, are either too heavy and cumbersome to maneuver or lack sufficient stability and safety features, particularly when used on uneven surfaces or in windy conditions.
Innovation Solution
A mobile stand with a roller carrier and a locking device featuring pairs of elongated locking elements that pivot in opposite directions, secured by a tensile connection with spring-loaded elements, allowing secure positioning without lifting the weight, and ensuring stability on uneven surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the base is made heavy (up to 150 kg) to provide stable footing, then stability is improved, but high torques are generated on the lifting device when the roller support is raised, creating safety risks
Solution Approach 1:
The patent introduces a force-assisting device in the form of a tension spring that acts as a counterweight mechanism. This tension spring is connected to the actuating rod and provides a counteracting force that reduces the torque load on the lifting device when raising or lowering the base, thereby maintaining stability while mitigating the harmful high torque effects
Solution Approach 2:
The tension spring serves as an intermediary element between the heavy base and the actuating mechanism. It mediates the force transmission by storing and releasing elastic energy, smoothing out the torque peaks that occur during base position changes, and protecting the lifting device from excessive loads
2Reliability
If a force-assisting device like a tension spring is added to counteract torques, then safety is improved, but the device complexity increases
Solution Approach 1:
The tension spring is designed to automatically engage and disengage based on the position of the actuating rod. It provides force assistance only when needed (during base position changes) and becomes inactive during normal operation, allowing the system to be simple during steady states while providing enhanced safety during transitions without requiring complex control mechanisms
3Reliability
If locking elements are spring-loaded to maintain contact with the surface, then reliability is improved, but the device complexity increases
Solution Approach 1:
The spring-loaded locking elements automatically maintain contact with the ground surface through elastic force without requiring active control. The springs are pre-loaded to ensure constant contact pressure, and the elements self-adjust to surface irregularities, providing reliable locking while keeping the mechanism simple and maintenance-free
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 stand provides easy and safe operation, maintaining stability on various surfaces and preventing rotation, even under gusty conditions, without requiring significant manual effort to switch between stationary and mobile positions.
Implementation Method 1
a force-assisting device, embodied, for example, in the form of a tension spring. Such a tension spring at least partially counteracts the pivoting movement of the actuating rod, or more precisely, the torque acting on the actuating rod
Implementation Method 2
the locking elements of the or each pair can be pivoted in opposite directions from the rest position into the locking position by actuating the actuating device, and in the locking position are aligned obliquely and in opposite directions in contact with the ground
Data Source
Figure 1a~1c
Figure 2a~3
Figure 4~6
AI summary
The invention relates to a mobile stand (2) for a held object, comprising a roller carrier (4) with at least three rollers (6) which are provided to roll on a surface (8) so that the stand (2) is mobile, a receptacle (10) via which the held object can be coupled to the mobile stand (2), a locking device (12) with which the roller carrier (4) can be locked in a fixed position relative to the surface (8), wherein the locking device (12) is connected to an actuating device (14) with which the locking device (12) can be moved reversibly between a rest position without contact with the surface and a locking position with contact with the surface.The locking device (12) of the mobile stand (2) has one or more pairs of longitudinally extended locking elements (16) and the locking elements (16) of the or each pair can be pivoted in opposite directions from the rest position to the locking position by actuating the actuating device (14) and in the locking position are inclined and in opposite directions in contact with the substrate.