Door Leaf Stop With Conical Sleeve For Angular Indexing
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Solution Overview
Problem
Existing shutter stoppers face issues with slipping and lack of angular indexing precision before final tightening, which compromises the stability and positioning of the abutment relative to the anchoring rod.
Innovation Solution
A leaf stopper design featuring a split conical sleeve with anchoring asperities and external ribs, allowing for angular indexing and secure immobilization through a nut and threaded bearing surface, ensuring precise positioning and preventing slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nut and threaded bearing surface are used to secure the abutment on the rod, then the abutment can be immobilized in position, but the abutment may slip before final tightening and cannot be angularly indexed to any position
Solution Approach 1:
The bearing surface is segmented into a conical surface and a flat surface, allowing the abutment to be positioned and indexed before final tightening. The conical surface provides preliminary positioning and angular indexing capability, while the flat surface with nut provides final secure immobilization.
Solution Approach 2:
The conical bearing surface enables preliminary positioning and angular indexing of the abutment before the nut is fully tightened. This preliminary action allows the abutment to be accurately positioned and indexed, after which the nut secures it in place.
2Measurement precision
If the stop is fixed at a determined spacing position, then positioning precision is achieved, but the ability to adjust to any angular position is lost
Solution Approach 1:
The bearing surface transitions from a dynamic state during positioning and indexing to a fixed state during operation. The conical surface allows movement and angular adjustment, while the nut locks the position, providing both flexibility during setup and precision during use.
3Device complexity
If a simple nut and threaded surface are used, then the structure is simple, but slipping occurs and angular indexing to any position is not possible
Solution Approach 1:
The bearing surface has different local qualities: the conical surface provides friction-based positioning and angular indexing, while the flat surface with nut provides secure immobilization. This local differentiation resolves the contradiction between simplicity and reliability.
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 secure and precise positioning of the abutment in any desired angular position, eliminating slipping risks and providing effective immobilization, thus enhancing the stability and usability of the shutter stopper.
Implementation Method 1
said sleeve having a conical bearing surface and a threaded bearing surface projecting from said bore to cooperate with a nut capable of ensuring, under a tightening effect, the tightening of the conical seat relative to the rod corresponding to the immobilization of the stop
Implementation Method 2
at least part of the bore of the conical bearing surface of the sleeve has anchoring asperities capable of to cooperate, in the clamping position, with complementary anchoring asperities presented by the rod
Data Source
Figure 1~2
Figure 3~7
Figure 8~11
AI summary
The stop has an anchoring rod (1) with an end at which a blocking element (2) is mounted. Adjustable stop (3) has an opening hole (3b) and cooperates with units formed by a bush for ensuring translational immobility of the stop (3) in a spaced position determined with respect to the element. The bush is mounted on the rod and engaged in the hole. The bush has a tapered bearing (5b) and a threaded bearing (5c) emerging in the hole for cooperating with a nut (6) to ensure tightening of the bearing (5b) relative to the rod corresponding to immobilization of the stop, under a locking effect.