Window Carriage Roller Bearing Force Dissipation
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Solution Overview
Problem
Existing carriage arrangements for windows and doors struggle to efficiently handle the increasing weight of larger, better-insulated sashes, requiring a solution that balances sturdiness with smooth-running movement and prevents jamming during transverse and longitudinal displacement.
Innovation Solution
A carriage arrangement featuring a driving bar system with a roller part and a sash part, utilizing oblique control slots and roller bearing guides with ball or needle bearings to facilitate smooth transverse movement and distribute forces effectively, preventing jamming and allowing easy operation of heavy sashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional guides with sliding friction are used, then the structure is simple, but the heavy sash cannot be moved smoothly
Solution Approach 1:
The patent replaces the traditional sliding friction mechanical guide system with a roller bearing guide system. The roller bearing guide (50a, 50b) uses rolling bodies (balls or needles) to convert sliding friction into rolling friction, dramatically reducing resistance and enabling smooth movement of heavy sashes while maintaining structural efficiency.
Solution Approach 2:
The patent changes the friction parameter by introducing roller bearings with rolling bodies. This transforms the interaction between the support rail and the carriage from high-friction sliding contact to low-friction rolling contact, fundamentally altering the mechanical parameters of the guide system to handle heavy loads smoothly.
2Ease of operation
If roller bearings are used to reduce friction, then the sash moves smoothly, but forces in the longitudinal direction are not adequately dissipated
Solution Approach 1:
The roller bearing guide serves multiple functions simultaneously: it provides low-friction rolling support for smooth movement while also dissipating forces in the longitudinal direction through the angled arrangement of rolling bodies. This multi-functional design resolves the contradiction between smooth operation and force dissipation capability.
Solution Approach 2:
The patent introduces a dimensional aspect by angling the rolling bodies relative to the longitudinal axis of the carriage. This angular arrangement allows the roller bearing guide to handle forces in multiple directions (both transverse and longitudinal), adding directional versatility to the force dissipation mechanism.
3Strength
If the roller part is made sturdy to support heavy sashes, then load-bearing capacity increases, but the risk of jamming during transverse movement increases
Solution Approach 1:
The guide system is segmented into multiple roller bearing guides (50a, 50b) positioned at different locations on the carriage. This segmentation distributes the load across multiple rolling contacts and provides redundancy, ensuring that the sturdy structure does not jam during transverse movement while maintaining high load-bearing capacity.
4Ease of operation
If sliding friction guides are used, then the device is simple, but heavy sashes cannot be operated comfortably
Solution Approach 1:
The patent replaces the simple sliding friction guide with a roller bearing guide system that uses rolling bodies. While this increases manufacturing complexity slightly, it dramatically improves the ease of operation for heavy sashes by reducing the force required to move them, achieving comfortable operation of heavy loads.
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 enables comfortable and smooth operation of heavy sashes by distributing forces through roller bearing guides, ensuring low friction and preventing jamming, thus addressing the need for a sturdy and efficient carriage system for modern window and door applications.
Implementation Method 1
The first roller bearing guide is designed to offload onto the roller part forces acting in the main plane... Rolling bodies of the first roller bearing guide are supported in the direction of the longitudinal axis of the roller part on both roller bearing beds
Data Source
AI summary
A carriage arrangement has a driving bar arrangement and a carriage. The carriage has a roller part with a plurality of running rollers. The roller part is displaceable transversely to the longitudinal extent of the carriage with respect to a wing part which can be mounted immovably on a wing. A driving bar of the driving bar arrangement has a control projection which engages in a control slot which is formed obliquely to the longitudinal extent of the carriage. To guide the roller part on the wing part is provided a first roller bearing guide which extends transversely to the longitudinal extent of the carriage. The first roller bearing guide has rolling bodies which are supported both on the wing and roller part so forces acting in the direction of the longitudinal extent of the carriage are channelled away from the wing part into the roller part with low friction.