Hydraulic Hinge Eccentric Axis Fixation
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Solution Overview
Problem
Existing hydraulic hinge systems for glass doors face challenges in securely fixing the eccentric axis due to the weight of the glass door, leading to potential slack and axis rotation over time, requiring frequent disassembly and reassembly.
Innovation Solution
The design incorporates cavities with specific slopes in one cover to house the eccentric axis ends, where shoes with complementary slopes block and fix the axis by contact, and perpendicular fixing means to absorb stresses, ensuring stable and adaptable immobilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fixing methods are used for the eccentric axis, then the structure is simple, but the axis becomes loose and rotates due to glass door weight over time
Solution Approach 1:
The fixing structure is segmented into multiple functional components: cavities with first and second slopes in the cover, shoes with third slopes that block the cavities, and perpendicular fixing means. This segmentation allows each component to perform a specific function in immobilizing the eccentric axis ends, resolving the contradiction between reliability and complexity by distributing the fixation function across specialized elements.
Solution Approach 2:
The shoes are positioned within the cavities and the eccentric axis ends are nested within the shoes, creating a nested structure where the axis ends are housed in shoes that are themselves housed in cavities. This nested arrangement provides multiple levels of constraint and stabilization, ensuring reliable axis fixation while maintaining a compact overall structure.
2Strength
If the shoe is pressed against the axis with a threaded pin, then the axis is fixed, but the heavy glass door weight causes the pin to fail and the axis to become loose
Solution Approach 1:
The slopes on the cavities and shoes are designed with specific angular characteristics to optimize the distribution of forces. The first slope in the cavity and the third slope in the shoe work together to convert the vertical load from the glass door into lateral forces that press the eccentric axis against the cavity walls, providing localized high-strength fixation points that prevent pin failure.
Solution Approach 2:
The fixing means are arranged perpendicular to the cover, introducing a new dimensional approach to fixation. Instead of relying solely on vertical pressing forces, the perpendicular arrangement creates lateral constraint forces that stabilize the axis against rotation and loosening, effectively adding a third dimension to the fixation strategy.
3Stability of the object's composition
If the axis is tightly fixed to prevent rotation, then stability is improved, but adjustment and repositioning becomes difficult
Solution Approach 1:
The fixing system is designed to be dynamically adjustable. The shoes can be repositioned within the cavities, and the fixing means can be loosened and tightened to allow temporary movement followed by secure fixation. This dynamic capability enables both stable operation during use and flexible adjustment during maintenance, resolving the contradiction between stability and adaptability.
Data Source
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AI summary
It comprises a base (1) with two covers (2,3), between whose covers the door is fixed, a hydraulic circuit (4) and an eccentric axis (5) that is fixed to one of the covers (2), characterized in that the cover (2) that is fixed to the eccentric axis (5) comprises: - cavities (6), one per end of the axis (7), with a first slope (8), and which configure a second slope (10) in its upper part, which reduces the inner space of the cavity (6), - shoes (9) that block the cavities (6), immobilize the ends (7) of the eccentric axis (5) by contact and are fixed against the cover (2), and that have a third slope (11), which is facing the second slope (10), and - fixing means (12), which are fixed to the shoes (9), arranged perpendicular to the cover (2).