Adjustable Damping Piston for Doors and Windows
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing damping devices for doors and windows are costly, difficult to produce, and lack adjustability in damping characteristics, often requiring high precision and multiple components, which complicates their manufacturing and installation.
Innovation Solution
A compact damping device with adjustable damping capabilities using a piston and cylinder design with a threaded mechanism and an adjusting needle, reducing the number of components in contact with the fluid and allowing for post-production adjustment of damping force, and an actuator with a crank and fixing elements for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a piston is placed inside a cylinder with fluid to create damping effect, then damping function is achieved, but manufacturing precision requirements increase and production costs rise
Solution Approach 1:
The piston is divided into two separate half-pistons that are positioned on opposite sides of the fluid chamber. This segmentation allows each half-piston to be manufactured and assembled independently, reducing the precision requirements for coupling multiple components while maintaining the damping function through fluid displacement.
Solution Approach 2:
The two half-pistons are combined with the fluid chamber to form an integrated damping mechanism. By merging the piston components with the chamber containing damping fluid, the design eliminates the need for high-precision seals and couplings between separate piston and cylinder bodies, while still achieving effective damping through fluid resistance.
2Ease of manufacture
If the passage size between cylinder and piston is fixed, then manufacturing is simplified, but damping force cannot be adjusted
Solution Approach 1:
The damping mechanism incorporates an adjustable component that allows the passage size or fluid flow characteristics to be modified after manufacturing. This dynamic adjustment capability enables the damping force to be tuned for different applications while maintaining a relatively simple fixed structure during normal operation.
Solution Approach 2:
The design allows for changing physical parameters such as passage cross-sectional area, fluid viscosity, or flow path length to adjust the damping force. By incorporating adjustable elements that modify these parameters, the same basic structure can adapt to different damping requirements without requiring complete redesign.
3Reliability
If multiple components are used to achieve damping, then damping function is improved, but device complexity increases
Solution Approach 1:
Multiple damping components are merged into a single integrated chamber containing damping fluid. Instead of using separate dampers or complex mechanical linkages, the invention combines the damping function into one unified structure where the fluid itself provides the damping effect, reducing the total number of components while maintaining effective damping performance.
Solution Approach 2:
The invention uses hydraulic damping fluid within a single chamber to provide the damping effect that would otherwise require multiple mechanical components. By utilizing fluid resistance and viscosity, the system achieves reliable damping with fewer moving parts, reducing complexity while maintaining or improving damping function.
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
The solution results in a more economical, flexible, and compact damping device that can be adapted for various applications with reduced production complexity and improved positioning, enabling efficient automatic door or window operation.
Implementation Method 1
The movement of the piston 1100 is damped owing to the presence of the fluid 1210 inside the cylinder 1200. Given the reduced size of the passage 1260, the movement of the fluid 1210 from one side of the piston 1100 to the other is slowed down, thus producing a damping effect.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2B
AI summary
The present invention concerns a piston for a damping device (2000), in particular for doors or windows, wherein the piston comprises a first half-piston (2510) and a second half-piston (2511), wherein the piston is configured for use with a first half-cylinder (2410) and a second half-cylinder (2420), wherein a first volume (2430) is included between the first half-piston (2510) and the first half- cylinder (2410), wherein a second volume (2440) is included between the second half-piston (2511) and the second half-cylinder (2420), and wherein the piston (2500) is provided with a hole (2550) for the passage of a fluid (1210) between the first volume (2430) and the second volume (2440). The invention furthermore concerns a damping device and a damped return device comprising the piston.