Fence Pivot Member With Stop Portion For Axial Stability
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Solution Overview
Problem
Existing fence structures are prone to dislocation or unfastening when subjected to pulling or pushing forces due to the inability of prior designs to effectively prevent axial slipping of transverse rails and vertical pickets, particularly with conical protruding structures that fail to secure the rail and picket assembly.
Innovation Solution
A fence structure incorporating a pivot member with a stop portion and a connecting strip that allows adjustable angles for the transverse railing and vertical pickets, featuring a stop portion with a larger outer diameter than the pivot hole to prevent axial slipping and secure the assembly, along with a design that conceals the connecting strip and pivot member within the transverse railing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conical protruding structure is used to allow rotational adjustment, then the angle adjustability is improved, but the axial stability deteriorates causing slipping and dislocation under external forces
Solution Approach 1:
The pivot member features an asymmetric cylindrical protruding structure with a stop portion at one end. The cylindrical shape provides uniform radial contact for rotational movement, while the stop portion creates an asymmetric axial constraint that prevents slipping in one direction. This asymmetric design resolves the contradiction by enabling angle adjustment through rotation while maintaining axial stability under external forces.
Solution Approach 2:
The pivot member allows dynamic rotational adjustment of the transverse railing relative to the vertical picket, enabling the fence structure to adapt to different installation angles. Simultaneously, the cylindrical contact surface provides dynamic friction-based stability that resists axial slipping while permitting controlled rotational movement, thus maintaining both adjustability and reliability under varying conditions.
2Reliability
If a pivot member with cylindrical protruding structure and stop portion is used, then the axial stability and combination strength are improved, but the device complexity increases
Solution Approach 1:
The pivot member integrates multiple functions into a single component: it provides rotational pivoting through the cylindrical protruding structure, axial constraint through the stop portion, and structural support. By merging these functions into one element that connects the transverse railing and vertical picket, the design achieves high combination strength without proportionally increasing overall device complexity.
Solution Approach 2:
The pivot member serves multiple purposes simultaneously: it enables angle adjustment, provides axial stability, prevents dislocation, and structurally connects the railing and picket. This multi-functional design achieves high reliability and combination strength while minimizing the number of separate components needed, thus controlling device complexity.
3Reliability
If the stop portion with larger outer diameter is added to prevent axial slipping, then the prevention of disconnection is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The pivot member is segmented into distinct functional zones: the cylindrical protruding structure for rotational contact and the stop portion for axial constraint. This segmentation allows each portion to be optimized independently - the cylindrical section for smooth rotation and the stop portion for reliable axial positioning - while maintaining reasonable manufacturing tolerances through clear functional differentiation.
Solution Approach 2:
The stop portion is designed with a locally increased outer diameter compared to the cylindrical section. This local quality change concentrates the axial constraint function in a specific region, providing effective prevention of disconnection while limiting the overall dimensional complexity. The localized dimension change is easier to manufacture than a completely non-uniform structure.
Data Source
AI summary
A fence structure includes a plurality of vertical pickets, at least one connecting strip, a plurality of pivot members, and at least one transverse railing. One end of the pivot member is provided with a stop portion whose outer diameter is larger than the inner diameter of the pivot hole of the vertical picket. The stop portion may limit the pivot member and prevent the pivot member from slipping axially after passing through the connecting strip and the vertical picket. By the aforesaid arrangement, the pivot member not only allows the angle of the transverse railing and the connecting strip to be adjustable according to needs, but also prevents the connecting strip and the vertical pickets from slipping or disconnecting resulting when being exerted by a pulling or pushing force.