Parallel Load Support Platform With Stable Flexible Limb Joints
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Solution Overview
Problem
Existing devices for holding, moving, and positioning workpieces or objects often fail to provide satisfactory performance under high force or pressure and lack consistent stability while maintaining flexibility.
Innovation Solution
A device with alternating revolute and prismatic joints, featuring a fixed lower platform, a movable upper platform, and at least three limbs with specific joint configurations that include prismatic and revolute joints for enhanced stability and flexibility, allowing for accurate and fast movements, and supporting greater loads with low friction linear motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If free movement of legs is provided, then flexibility is improved, but stability deteriorates
Solution Approach 1:
The patent changes the parameters of the joint systems from free movement to constrained movement with alternating revolute and prismatic joints. This parameter change allows the legs to maintain flexibility in specific directions while gaining stability through controlled motion constraints, directly resolving the contradiction between flexibility and stability.
Solution Approach 2:
The patent introduces dynamic joint systems that can adapt their movement characteristics. The alternating revolute and prismatic joints create a dynamic structure that provides flexibility where needed while maintaining stability through controlled degrees of freedom, allowing the system to optimize both flexibility and stability simultaneously.
2Force
If device operates under high force or pressure, then load-bearing capacity is improved, but reliability deteriorates
Solution Approach 1:
The patent changes the structural parameters by introducing alternating revolute and prismatic joints with specific constraints. This parameter change enables the device to operate reliably under high force conditions by distributing loads more effectively and preventing uncontrolled movements that could lead to failure.
Solution Approach 2:
The constrained joint systems act as a form of beforehand cushioning by preventing extreme positions and uncontrolled movements before they can cause damage. The alternating joint configuration ensures that the structure remains within safe operational parameters even under high force conditions, maintaining reliability.
3Stability of the object's composition
If more joints are added to limbs, then stability is improved, but device complexity increases
Solution Approach 1:
The patent segments each limb into multiple sections with alternating joint types. This segmentation allows the complex stability requirements to be met by distributing joint configurations along the limb length, where each section contributes to overall stability without requiring all joints to be complex.
Solution Approach 2:
The patent uses parameter changes by alternating between two simple joint types (revolute and prismatic) rather than using one complex joint type throughout. This alternating parameter configuration achieves stability through variety and distribution while keeping individual joint components relatively simple.
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 device achieves robust and stable construction, allowing for precise and flexible movement of the upper platform relative to the lower platform, even under pressure, with reduced risk of limb damage and improved load-bearing capacity.
Implementation Method 1
supporting greater loads with low friction linear motion
Implementation Method 2
the lower section of each limb further comprises a first revolute joint arranged for movement around a second axis
Implementation Method 3
The intermediate section of each limb comprises a second prismatic joint extendable along a third axis
Implementation Method 4
the upper section of each limb comprises a second revolute joint for rotation around a fourth axis
Data Source
AI summary
The disclosure relates to a machine comprising; a fixed lower platform having a first connecting area; a movable upper platform having an operating area and a second connecting area; at least three limbs, each limb comprising a lower section, an upper section and an intermediate section between the lower section and the upper section; wherein each limb interconnects the fixed lower platform and the movable upper platform by joining the first connecting area and the second connecting area, wherein the lower section of each limb comprises a first part of a first prismatic joint, wherein, the first connecting area comprises a cooperating second part of the first prismatic joint; wherein the lower section of each limb further comprises a first revolute joint; wherein the intermediate section of each limb comprises a second prismatic joint, wherein the upper section of each limb comprises a second revolute joint; wherein each limb is pivotably movable relative to the movable upper platform; wherein each of the limbs comprise an actuation arrangement for moving the movable upper platform relative to the fixed lower platform.