Lever-Clamped Cable Bushing for High-Seal Fast Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cable bushings with resilient cable grommets face challenges in achieving a high sealing effect while maintaining simple assembly, as existing solutions either require complex assembly processes or compromise on sealing due to overstressing of grommets.
Innovation Solution
A cable bushing design featuring two frame parts with a clamping lever and guide surfaces that allow for efficient assembly by varying the path and force applied, ensuring gradual tension buildup without exceeding maximum stress on the grommets, utilizing a sliding edge and guide surface interaction to facilitate easy and secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frame parts are screwed together to achieve high sealing effect, then sealing quality is improved, but assembly complexity and assembly time increase
Solution Approach 1:
The patent employs a dynamic clamping lever mechanism that transitions from an open position to a closed position, where the lever rotates about a fulcrum to apply progressive clamping force. This dynamic action replaces static screwing operations, achieving high sealing effect through controlled mechanical movement rather than complex threaded fastening.
Solution Approach 2:
The clamping lever acts as an intermediary mechanical element between the operator's input force and the frame parts to be joined. By introducing this lever with its fulcrum and guide surface interaction, the system transforms simple rotational motion into effective clamping force, simplifying the assembly process while maintaining high sealing quality.
2Reliability
If clamping bracket closure is used to increase bracing forces, then sealing effect is improved, but device complexity and production complexity increase
Solution Approach 1:
The clamping lever provides a dynamic force multiplication mechanism through its lever arm geometry. As the lever rotates from open to closed position, the mechanical advantage changes, allowing progressive application of bracing force without requiring a complex multi-stage closure system. The guide surface ensures controlled movement while the fulcrum provides stable rotation, achieving high forces with simple construction.
3Reliability
If clamping bracket closure is used to secure fixation, then reliability is improved, but stress on grommets increases causing minimal seating
Solution Approach 1:
The dynamic rotation of the clamping lever about the fulcrum allows progressive application of clamping force as the lever moves from open to closed position. This gradual force application prevents sudden overstressing of the grommets, allowing them to seat properly into their recesses while still achieving secure fixation. The guide surface ensures controlled movement throughout the closing process.
Solution Approach 2:
The guide surface performs a preliminary action by guiding the sliding edge during the initial phases of lever closure. This controlled guidance ensures that the frame parts are properly aligned and that force is applied gradually, preventing premature or excessive stress on the grommets before they are fully seated, thereby ensuring both secure fixation and proper grommet seating.
4Productivity
If sliding element is used for rapid assembly, then assembly time is reduced, but bracing forces required for high sealing effect are not applied
Solution Approach 1:
The clamping lever combines rapid assembly capability with high force application through its dynamic rotation about the fulcrum. The lever's movement from open to closed position can be performed quickly, and the mechanical advantage of the lever system automatically multiplies the applied force to generate the high bracing forces needed for effective sealing, unlike simple sliding elements that lack force multiplication capability.
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 design achieves a high sealing effect with simplified assembly, allowing for rapid bracing and increased bracing forces without overstressing the grommets, resulting in a well-sealed construction.
Implementation Method 1
two frame parts (6, 7), which in turn may be formed in multiple parts and for example may have dividers (11) that are rigidly or detachably connected to the frame part in order to define a plurality of receiving spaces for a plurality of cable grommets (3). These two frame parts are then braced against the resilient cable grommets (3) placed therein
Implementation Method 2
by means of a clamping lever (8) in a bracing direction (V). The clamping lever (8), or the second frame part (7), i.e. the frame part to which the clamping lever is not rotatably movably connected, comprises a guide surface (22). The second frame part, or accordingly the clamping lever, depending on which of the elements takes on which function, comprises a sliding edge (21)
Data Source
AI summary
A cable bushing includes a frame having at least one space for receiving at least one resilient cable grommet, and which has at least one first and one second frame part, as well as a clamping lever which may be rotatably movably connected to the first frame part and is movable between an open position and a closed position. The frame parts are braced against one another in a bracing direction in the closed position of the clamping lever.