Offset Damper Stops for Progressive Sliding Door Braking
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Solution Overview
Problem
Traditional damper stops for sliding doors and shutters have a limited stroke, restricting the progressive braking effect during opening and closing, as the exposure of piston stems is constrained within the overall longitudinal extension of the body, leading to inadequate braking performance.
Innovation Solution
The sliding and braking device features offset damper stops with fully exposed piston stems, allowing a greater stroke of up to 60 mm, utilizing a 'C' shaped profile fixed to the door with cantilevered sections for guides and damper stops, and a wall support with offset bevelled appendages to activate pivoting sliders, ensuring complete exposure of piston stems within the body's size constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional damper stops are used with pistons arranged in alignment within a compact body, then the device maintains a compact size, but the stroke of the damper stops is limited to approximately 30 mm, reducing braking effectiveness
Solution Approach 1:
The patent transitions from a one-dimensional linear arrangement of pistons to a two-dimensional offset configuration. The first and second pistons are positioned at different longitudinal locations and offset laterally, allowing their stem exposures to occur in different spatial planes. This dimensional change enables both pistons to achieve complete stroke exposure without exceeding the body's overall longitudinal extension, effectively resolving the contradiction between compact size and stroke length.
2Length of stationary object
If the overall longitudinal extension of the body is constrained, then the device remains compact and aesthetically pleasing, but the progressive braking effect is significantly limited
Solution Approach 1:
The patent employs asymmetric positioning of the two pistons within the body. Rather than symmetric alignment, the first piston is positioned at a first longitudinal location while the second piston is positioned at a second longitudinal location with a lateral offset. This asymmetric arrangement allows the actuator to sequentially engage both pistons at different stages of door movement, enabling complete stem exposure for both pistons within the constrained body length and providing a progressive, multi-stage braking effect that enhances reliability.
3Reliability
If damper stops are positioned to maximize braking stroke, then braking performance is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent designs a single actuator mechanism that serves multiple functions: it sequentially activates both the first and second damper stops at different stages of door movement. This multi-functional actuator, with its offset appendages, eliminates the need for separate activation mechanisms for each piston, thereby maintaining ease of manufacture while achieving superior braking performance through coordinated multi-piston engagement.
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 configuration enables effective and progressive braking of sliding doors and shutters by fully utilizing the piston stroke and coil spring extension, providing enhanced resistance and reliability while maintaining the device's compact size, with a single wall support effectively activating both damper stops.
Implementation Method 1
opposite damper stops, in this case consisting of a gas piston and a coil spring, arranged in alignment in opposite supports fixed to the inner face of the door
Implementation Method 2
opposite damper stops, in this case consisting of a gas piston and a coil spring, arranged in alignment in opposite supports fixed to the inner face of the door
Data Source
AI summary
A device for sliding and braking a sliding door includes a profile fastened to an inside of the sliding door, and two damper stops arranged on a base portion of the profile at opposite ends of the profile and offset relative to each other in a direction perpendicular to the inside of the sliding door. Each damper stop includes a piston and a coil spring housed in a frame, and a pivoting slider slidably supported in the frame and connected to the piston and the coil spring. The device further includes a wall support for supporting the door on a wall via engagement of wheels provided on the support in an upper guide portion of the profile. The support has appendages arranged so that a respective one of the appendages actuates the pivoting slider of one of the two damper stops when opening and closing the sliding door.