Sliding Door Compensation Aid via Offset Roller Lever
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Solution Overview
Problem
Existing sliding door systems, especially hermetically sealed ones, face challenges in efficiently compensating for the weight of heavy doors during lowering and opening, particularly in scenarios where power failure occurs, requiring excessive manual force and complex mechanical components.
Innovation Solution
A compensation aid is introduced, featuring additional rollers with a vertical offset that contact the rail and engage a spring body via a reversing lever, counteracting the door weight, allowing for reduced manual force requirements and simplified mechanical design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hermetically sealed sliding door is used to ensure safety and sealing, then the door weight increases significantly, but the force required to open the door manually during power failure exceeds the maximum allowable limit
Solution Approach 1:
The patent applies a spring-based counterweight mechanism where a compression spring is positioned to exert an upward force on the door assembly. The spring is pre-compressed to generate a force that counteracts the weight of the heavy hermetic door, reducing the manual force needed to open it during power failures while maintaining the door's sealing integrity
2Force
If a compensation aid with complex mechanical components is used to reduce manual opening force, then the door weight compensation improves, but the device complexity increases
Solution Approach 1:
The patent extracts the essential compensation function from complex mechanical systems and implements it through a single spring element. By removing unnecessary intermediate components and linkages found in traditional compensation aids, the design achieves weight compensation with minimal parts - essentially just the spring, its mounting brackets, and adjustment mechanisms
Solution Approach 2:
The patent enables easy adjustment of the spring's pre-compression force through a simple mechanism that allows changing the spring's initial state. This parameter adjustment capability provides flexible adaptation to different door weights without requiring complex mechanical reconfiguration, maintaining simplicity while achieving proper force compensation
3Use of energy by moving object
If traditional compensation aids are used for heavy doors, then energy accumulation during closing is achieved, but the system requires permanent pressure on the rail increasing rolling resistance
Solution Approach 1:
The spring-based compensation aid operates periodically - compressing during door closing and expanding during door opening - rather than maintaining permanent pressure. The spring is only actively engaged when needed for compensation, allowing the door to move freely on the rail during normal operation without increased rolling resistance, thus achieving energy accumulation without continuous energy loss
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
This solution enables the opening of heavy sliding doors with a force of less than 220 Newtons, meeting safety standards and reducing the need for complex mechanical systems, while allowing for energy savings and effective operation during power failures.
Implementation Method 1
a spring body (8) is assigned to the reversing lever (3), wherein the further roller (2) acts on the spring body (8) via the reversing lever (3), wherein the spring force of the spring body (8) counteracts at least part of the door weight (1)
Implementation Method 2
the spring force of the spring body (8) counteracts at least part of the door weight (1)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Compensation aid (52) for a lowering sliding door, comprising at least one door leaf (1) suspended on a carriage (7), wherein the carriage (7) rolls on a track (20) by means of rollers (22) and the spring force of at least one spring body (8) counteracts the weight of the door leaf (1) during the closing process, wherein the carriage (7) has at least one further roller (2) with a vertical offset (26) above the track (20), which is arranged at the free pivotable end of a spring-loaded deflection lever (3), and comes into contact with the track (20) during the closing process and at least partially compensates the weight of the door leaf (1).