Clamping Bushing System for Winding Shaft Axle Cap
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Solution Overview
Problem
The assembly of winding shafts in building opening shading devices is complex and costly, with existing axle cap modules requiring pressing or hammering for installation, and they lack reliability and adaptability for different shaft diameters and cross-sectional shapes.
Innovation Solution
A clamping bushing system with two interlocking clamping bushings, featuring conical wedge sections, that securely fastens the axle cap module to the winding shaft using a screw connection, eliminating the need for pressing and allowing for easy assembly and adaptability to various shaft dimensions and shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional pressing or hammering methods are used to install axle cap modules, then the assembly process is simple in terms of steps, but the manufacturing cost increases and the complexity of the assembly process increases
Solution Approach 1:
The clamping bushing is divided into two separable parts: an outer clamping bushing and an inner clamping bushing. This segmentation allows the components to be assembled in a controlled sequence using a screw connection, transforming a complex pressing operation into simpler, staged assembly steps that reduce overall process complexity while maintaining ease of manufacture.
2Ease of manufacture
If traditional pressing methods are used to install axle cap modules, then the installation process is straightforward, but the manufacturing cost increases
Solution Approach 1:
The clamping bushing system uses a self-contained screw connection mechanism where the two clamping bushings fasten to each other and to the winding shaft without requiring external pressing equipment. This self-service assembly method eliminates the need for expensive pressing machinery and reduces manufacturing costs while maintaining installation straightforwardness.
3Ease of manufacture
If fixed-diameter axle cap modules are used, then the manufacturing process is simple, but the adaptability to different shaft diameters and shapes decreases
Solution Approach 1:
The clamping bushing design with its two-part structure and screw connection creates a universal mounting solution that can accommodate various winding shaft diameters and cross-sectional shapes. The modular design allows the same basic clamping mechanism to be adapted to different shaft configurations, enhancing versatility without significantly complicating the manufacturing process.
4Reliability
If pressing methods are used to secure the axle cap module, then the connection is reliable, but the assembly process becomes more complex and costly
Solution Approach 1:
The invention replaces the mechanical pressing system with a threaded fastening system. The screw connection between the outer and inner clamping bushings provides reliable mechanical interlocking and clamping force through thread engagement, achieving connection reliability equivalent to or exceeding pressing methods while simplifying the assembly process and reducing equipment requirements.
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 solution simplifies and cost-reduces the assembly of winding shafts, ensures reliable seating of the axle cap module, and allows for universal fitment across different winding shaft diameters and cross-sectional shapes, enhancing manufacturing efficiency and flexibility.
Implementation Method 1
The clamping bushing (8) has at least one wedge section (92) which tapers conically on the inner circumference. At least one, preferably the inner clamping bushing (9), also has a counter-wedge section (82) which is concentric to the winding shaft axis and tapers conically on the outer circumference towards the other clamping bushing (8) and which is assigned to the inner circumferential wedge section (92) of the clamping bushing (8).
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to an axle cap module for a hollow winding shaft of a building opening shading device with a curtain that can be wound up and unwound on the winding shaft. The module has an inner bushing (5, 9) that can be attached to the end face of the winding shaft and a support sleeve (6) that is coaxially received in the inner bushing (5, 9) for supporting the winding shaft at its end face. The support sleeve (6) is displaceably held in the axial direction of the winding shaft between an outwardly extended position and an inwardly pressed-in position. The invention is characterized in that the inner bushing (5, 9) is received in a clamping bushing (8) that can be inserted into the end face of the winding shaft and can be expanded radially outward at least partially via the inner bushing (5, 9). The clamping bushing (8) has two clamping sleeves (5, 9) that can be screwed together.which are movable towards each other in the winding shaft axis direction by tightening the screw connection and away from each other by loosening the screw connection, wherein the clamping bushing (8) has at least one wedge section (82) concentric with the winding shaft axis and tapering conically on its inner circumference, and at least one clamping bushing, preferably the inner clamping bushing (9), has a counter wedge section (92) tapering conically on its outer circumference towards the other clamping bushing (5), so that when the screw connection is tightened, the at least one clamping bushing (9) presses with its counter wedge section (92) against the wedge section (82) of the clamping bushing (8), thereby clamping the shaft cap module in the winding shaft, and the clamping of the shaft cap module in the winding shaft is released when the screw connection is loosened.