Parking Brake Fitting Assembly with Dynamic Coupling
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Solution Overview
Problem
Existing fitting arrangements for parking brakes in windows and doors limit the stroke of the drive rod, restricting the actuation of the parking brake and requiring additional stroke compensation elements.
Innovation Solution
A fitting arrangement with a locking element and a transmission element featuring coupling sections that can be coupled or decoupled, allowing the locking element to execute a greater stroke, and incorporating a reverse rotation lock to prevent accidental release, with optional toothed designs and a housing system for assembly simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coupling sections are always engaged with each other, then the parking brake can be actuated, but the stroke of the drive rod is limited
Solution Approach 1:
The coupling sections transition from a static always-engaged state to a dynamic state where they can be coupled or decoupled based on the position of the locking element. This allows the drive rod to have unrestricted stroke while still ensuring reliable parking brake actuation when needed.
Solution Approach 2:
The coupling sections are engaged periodically - coupled when the locking element is in positions requiring brake actuation, and decoupled when the locking element is in end positions requiring full stroke. This periodic engagement pattern resolves the contradiction between reliability and stroke length.
2Length of moving object
If the locking element has a greater stroke, then stroke compensation elements can be dispensed with, but the coupling sections must be decoupled in at least one end position
Solution Approach 1:
The coupling mechanism is segmented into two separate coupling sections - one on the locking element and one on the transmission element. This segmentation allows independent movement and engagement/disengagement, enabling greater stroke without requiring complex stroke compensation elements.
3Ease of operation
If a toothed arrangement is used for coupling sections, then engagement and disengagement is easy, but manufacturing precision requirements increase
Solution Approach 1:
Instead of having both coupling sections as active teeth requiring precise alignment, one coupling section is designed as a tooth gap (receptive element) and the other as a tooth (active element). This inversion simplifies engagement and disengagement while reducing manufacturing precision requirements compared to two active toothed arrangements.
Data Source
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AI summary
A fitting arrangement (24, 124) for a window (10), a door or the like for actuating a parking brake (16) with a locking element (36, 136) that can be driven by a drive rod (30) and moved between two end positions, and with a transmission element (34, 134) that can be arranged in a rotationally fixed manner on an actuating shaft (22) of the parking brake (16), wherein the locking element (36, 136) has a first coupling section (42) and the transmission element (34, 134) has a second coupling section (44), is characterized in that the coupling sections (42, 44) can be coupled to the transmission element (34, 134) for transmitting a movement of the locking element (36, 136) and are decoupled in at least one end position of the locking element (36, 136).