Sliding Door Roller Height Adjustment Under Load
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Solution Overview
Problem
Existing sliding door roller systems cannot adjust the height or spacing of the housing relative to the track under load, leading to improper load distribution, suboptimal load capacity, and rigidity issues.
Innovation Solution
A sliding door roller system with a rotatable adjustment mechanism, including a non-circular cam and gear wheel, allows for the adjustment of the outer housing's height relative to the roller housing while under load, using a cam with a peripheral edge of increasing radius to index the outer housing in multiple height positions, and a roller wheel with an outer groove for improved load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door panel is removed from the housing for adjustment, then the height or spacing of the housing can be adjusted, but the door panel must be removed and reinstalled, increasing time loss and operational complexity
Solution Approach 1:
The housing is made dynamically adjustable relative to the roller assembly through a threaded rod mechanism that allows the housing to move vertically along the roller axis. This enables height adjustment while the door panel remains installed, eliminating the need to remove and reinstall the panel for each adjustment.
Solution Approach 2:
The adjustment mechanism is pre-configured within the housing structure, with the threaded rod and nut assembly already in place. This preliminary preparation allows immediate adjustment without requiring disassembly of the door panel or housing, saving time and operational steps.
2Ease of operation
If the housing is adjusted before installing the door panel, then the height can be set, but the load capacity and rigidity of the housing under full load is compromised
Solution Approach 1:
The housing is designed with dynamic adjustability through a threaded rod mechanism that allows vertical movement along the roller axis while maintaining structural integrity. This enables height adjustment under load without compromising the load-bearing capacity, as the adjustment mechanism is integrated into the existing structural framework.
Solution Approach 2:
The housing position parameter can be changed dynamically by rotating the threaded rod, which moves the housing vertically relative to the roller assembly. This parameter change is achieved through a controlled mechanical interaction that preserves the load-bearing capabilities of the housing structure under full load conditions.
3Device complexity
If the roller contacts the track at a single point, then the structure is simple, but the load distribution is improper and reduces reliability
Solution Approach 1:
The roller contact is extended from a single point (zero-dimensional contact) to a line contact by introducing an outer groove in the roller. This dimensional change allows the roller to contact the track along a linear path, distributing the load across multiple points and improving reliability while maintaining relatively simple structure.
Solution Approach 2:
The roller is designed with a specific geometric feature (outer groove) that creates a localized region of enhanced contact with the track. This local quality improvement concentrates the contact area in a specific region of the roller, optimizing load distribution without requiring complex modifications to the overall roller structure.
4Stability of the object's composition
If the housing is fixed relative to the roller assembly, then the structure is rigid and simple, but the adaptability to different door positions and loads is reduced
Solution Approach 1:
The housing is designed with dynamic adjustability relative to the roller assembly through a threaded rod mechanism. This allows the housing position to be changed while maintaining structural rigidity, enabling adaptation to different door positions and load conditions without compromising the overall structural stability.
Solution Approach 2:
The housing is designed to serve multiple functions: it provides structural support, allows height adjustment, and can be positioned at different vertical locations relative to the roller assembly. This multi-functionality enables the same housing structure to adapt to various door configurations and load requirements while maintaining rigidity.
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
Enables adjustment of the door panel's height or spacing relative to the track under full load, enhancing load capability and distribution, eliminating the need to remove the panel for adjustments and providing higher rigidity and load capacity.
Implementation Method 1
a non-circular cam and gear wheel, allows for the adjustment of the outer housing's height relative to the roller housing while under load, using a cam with a peripheral edge of increasing radius to index the outer housing in multiple height positions
Implementation Method 2
a roller wheel with an outer groove for improved load distribution
Data Source
AI summary
A sliding door roller system comprises a roller housing comprising a pair of generally vertical side members and an integral base portion including a projection on an inner surface thereof, the roller housing at least partially disposed within an outer housing; at least one roller wheel rotatably coupled to the roller housing; an outer housing moveable relative to the roller housing and the at least one roller wheel in a direction perpendicular to a rotational axis of the at least one roller wheel; and a rotatable adjustment mechanism coupled to the roller housing and the outer housing. The adjustment mechanism is rotatable from an exterior of the outer housing and is adapted to index the outer housing relative to the roller housing in a plurality of height positions in situ under load of a panel secured to the outer housing.