Hinge Strap Lifting Spindle for Sealing Pressure Adjustment
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Solution Overview
Problem
Existing hinge systems require a separate turning tool to adjust the bearing bush, which can lead to the loss of height adjustment and make it impossible to adjust sealing pressure without the tool.
Innovation Solution
The lifting spindle is designed as a multifunctional component that can serve as both a height adjustment mechanism and a turning aid, eliminating the need for a separate turning tool by incorporating a key surface and counter-key surface for rotational actuation, and featuring latching mechanisms to prevent undesired changes in sealing pressure during height adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate turning tool is required to rotate the bearing bush, then the bearing bush can be rotated to adjust sealing pressure, but the device complexity increases and the ease of operation decreases due to the need to keep a separate tool available
Solution Approach 1:
The lifting spindle is merged with the turning tool function by providing a counter-key surface on its opposite end. This allows the same component to perform both height adjustment (lifting) and rotational adjustment (sealing pressure control) functions, eliminating the need for a separate turning tool and reducing overall device complexity
Solution Approach 2:
The lifting spindle is designed as a multi-functional component that serves dual purposes: it acts as both a lifting mechanism for height adjustment and a turning tool for rotating the bearing bush. The counter-key surface on the opposite end enables it to perform rotational actuation, making it a universal tool for both adjustment tasks
2Ease of operation
If the lifting spindle is completely unscrewed to rotate the bearing bush, then the bearing bush can be turned, but the height adjustment is lost during the process
Solution Approach 1:
The counter-key surface is pre-positioned on the opposite end of the lifting spindle, allowing the user to immediately perform rotational adjustment without completely unscrewing the spindle. This preliminary preparation of the turning interface prevents the need to lose height adjustment settings during the adjustment process
3Device complexity
If the lifting spindle is used as a turning tool, then a separate turning tool is eliminated, but the sealing pressure may change undesirably during height adjustment
Solution Approach 1:
The latching mechanism quickly and decisively locks the bearing bush in its current position during height adjustment, preventing any gradual or undesired rotation. This rapid locking action skips over potential instability issues by firmly securing the sealing pressure setting throughout the adjustment process
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 design allows for the adjustment of sealing pressure and height without a separate turning tool, ensuring precise control and preventing unintended changes in sealing pressure, thus enhancing the usability and reliability of the hinge system.
Implementation Method 1
a lifting spindle which has an external thread and can be screwed into the internal thread
Implementation Method 2
a bearing bush arranged in the longitudinal recess and rotatable about a laterally offset axis of rotation parallel to the hinge axis
Implementation Method 3
a key surface is provided on the bearing bush and a counter key surface which can be brought into operative connection with the key surface is provided on the lifting spindle
Implementation Method 4
the longitudinal recess has at least one radial latching depression. At least one latching projection is then preferably provided on the bearing bush, which can be brought into operative connection with the latching recess
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
In the case of a strap (100) of a hinge for connecting a leaf/casement to a frame in a hinged manner about a hinge axis (S), having a longitudinal aperture (3), having a bearing bushing (4) which is arranged in the longitudinal aperture (3), can be rotated, by means of an optionally attachable turning aid (12), about a laterally offset axis of rotation (D) parallel to the hinge axis (S), and comprises a bearing-bushing aperture (5) for accommodating a hinge pin, having an internal thread (7) which, in the operating position, is provided at least in the lower region of the longitudinal aperture (3), and having a lifting spindle (6) which has an external thread (8), can be screwed into the internal thread (7) and has a supporting side (9) for supporting the bearing bushing (4) and/or the hinge pin directly or indirectly, the lifting spindle (6) is designed in the form of an optionally attachable turning aid (12).