Actuation Cylinder Extraction Resistance Groove Blocking
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Solution Overview
Problem
Existing cylinders for actuation mechanisms lack adequate security against extraction attempts of the rotating body from the main body, which can compromise the blocking mechanism and increase complexity and costs.
Innovation Solution
Incorporating an annular groove with a blocking element fixed to the main body, featuring an engagement portion that slidably engages the groove, providing resistance against extraction attempts by interfering with the transverse surface in the extraction direction, and optionally using an elastic stop ring for enhanced security without increasing structural complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional cylinder structure without additional blocking elements is used, then the construction complexity and cost are low, but the resistance against extraction attempts of the rotating body from the main body is insufficient
Solution Approach 1:
The blocking element is divided into two functional parts: an engagement portion that interacts with the annular groove to prevent extraction, and a fixed portion that is rigidly attached to the main body. This segmentation allows the blocking element to provide extraction resistance while maintaining rotational freedom through the groove engagement mechanism.
Solution Approach 2:
The annular groove acts as an intermediary element between the blocking element and the rotating body. The groove's transversal surface mediates the interaction by providing a blocking surface that opposes extraction forces while allowing the engagement portion to slide along the groove during rotation, thus enabling both security and rotational movement.
2Reliability
If blocking elements are added to prevent extraction, then security against tampering improves, but the assembly complexity increases
Solution Approach 1:
The blocking element combines multiple functions into a single component: it provides extraction resistance through its engagement with the annular groove, maintains rotational capability through the sliding engagement, and is simplified for assembly by being a single piece that can be directly fixed to the main body without requiring separate parts for rotation control and extraction prevention.
3Force
If the engagement portion is rigidly fixed to the main body, then resistance to extraction forces increases, but the ability to allow rotation is reduced
Solution Approach 1:
The engagement portion is designed with dynamic characteristics that allow it to slide along the annular groove during rotation while maintaining a fixed position relative to the main body in the longitudinal direction. This dynamic sliding capability enables the blocking element to provide rigid resistance to extraction forces while simultaneously allowing free rotation of the rotating body.
Data Source
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AI summary
Cylinder (1) for actuation mechanisms comprising a main body (2) having a cavity (3), a rotating body (4) rotatably housed in said cavity (3) and having an axis of rotation (100) along a longitudinal development direction of the cylinder (1), wherein the rotating body (4) has, on a respective outer surface (5) having a longitudinal development, a groove (6) having substantially annular development centred in the axis of rotation (100) and lying on a plane perpendicular to the axis of rotation (100), wherein the cylinder (1) comprises a blocking element (7) fixed to the main body (2) and having an engagement portion (8) which slidably engages the groove (6) of the rotating body (4).