Cable Terminal Cushion Fixing for Vibration Isolation
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Solution Overview
Problem
Existing terminal supporting apparatuses face challenges in positioning the end of a control cable in the cable axis direction while maintaining low rigidity in the axial direction, as the cushion member is often compressed, leading to increased rigidity and potential vibration transmission between input and output devices.
Innovation Solution
A terminal supporting apparatus with a hub, flange, and cushion member where the cushion's large-diameter portion is fixed to the housing, creating a clearance in the cable axis direction to prevent immediate contact and maintain low rigidity, allowing precise positioning of the outer cable end and reducing vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cushion member is compressed in the cable axis direction to contact the end surface with the housing for positioning, then the positioning precision of the outer cable end is improved, but the rigidity of the cushion member in the axial direction increases
Solution Approach 1:
The invention changes the fixing dimension from axial compression to radial fixation. The cushion member is fixed to the housing in the radial direction (perpendicular to cable axis) rather than being compressed in the axial direction. This dimensional change allows the cushion to maintain low axial rigidity for vibration isolation while achieving precise positioning through radial fixation structure.
Solution Approach 2:
Instead of compressing the cushion member in the cable axis direction to achieve positioning (conventional approach), the invention inverts the approach by fixing the cushion member to the housing in a direction perpendicular to the cable axis. This inversion resolves the contradiction by decoupling the positioning function from axial compression, allowing the cushion to remain soft in the axial direction for vibration isolation.
2Object-affected harmful factors
If the rigidity of the cushion member is lowered in the axial direction to inhibit vibration transmission, then the vibration isolation performance is improved, but the positioning capability of the outer cable end deteriorates
Solution Approach 1:
The invention separates the positioning function from the vibration isolation function by operating in different dimensions. Positioning is achieved through radial fixation (perpendicular to cable axis) while vibration isolation is maintained through low axial rigidity. This dimensional separation allows both requirements to be satisfied simultaneously without compromise.
Solution Approach 2:
The invention segments the functions of the cushion member into two independent aspects: positioning (achieved through radial fixation to housing) and vibration isolation (achieved through low axial rigidity). This functional segmentation allows the cushion to be optimized for vibration isolation while positioning is handled by the radial fixation structure, resolving the contradiction between these two 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
The solution effectively positions the outer cable end in the cable axis direction while lowering the axial rigidity of the cushion member, thereby inhibiting vibration transmission and enhancing the vibration inhibiting effect.
Implementation Method 1
a cushion member that is provided to surround the outer periphery of the hub and abuts on the flange at both a front surface and a back surface of the flange
Implementation Method 2
the transmission of the vibration is inhibited by providing the cushion member between the end of the outer cable and the housing
Data Source
AI summary
A terminal supporting apparatus is provided with: a hub that is attached to an end of the outer cable and is provided with a flange on an outer periphery; a cushion member that is provided to surround the outer periphery of the hub and abuts on the flange at both a front surface and a back surface of the flange; and a housing that houses the cushion member. The cushion member includes a large-diameter portion that abuts on the flange. At least within a range contacting with the hub, at least a part of an outer peripheral surface of the large-diameter portion is fixed to an inner surface of the housing, while a clearance is formed between the cushion member and the inner surface of the housing over an entire region of an end surface of the large-diameter portion in a cable axis direction.