Parking Cable Split Liners Reduce Friction and Elastic Restoring Force
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Solution Overview
Problem
The existing parking cables suffer from high frictional resistance due to metal-to-metal contact, leading to reduced operational efficiency and durability, and assembly workability is compromised by the elastic restoring force of liners in curved sections.
Innovation Solution
A parking cable structure featuring a plurality of press-fitted plastic split type liners positioned to deviate from in-line assembly and curved sections, reducing friction and eliminating the elastic restoring force, with cap casings assembled by swaging to secure the liners and improve assembly workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate liner is inserted between the inner cable and conduit to reduce frictional resistance, then operational efficiency improves, but assembly workability deteriorates due to elastic restoring force in curved sections
Solution Approach 1:
The liner is divided into multiple segments rather than being a single continuous piece. Each segment is inserted separately into the conduit, allowing the cable to be bent and curved during assembly without generating elastic restoring force that would complicate installation. The segmented structure maintains the friction-reducing function while eliminating the assembly difficulty caused by a continuous liner in curved sections.
2Device complexity
If metal-to-metal contact is used between inner cable and conduit, then structural simplicity is maintained, but frictional resistance increases reducing durability
Solution Approach 1:
A liner made of low-friction material is introduced as an intermediary component between the inner cable and the conduit. This liner acts as a mediator that reduces frictional resistance and wear, thereby improving durability and operational smoothness. The liner can be inserted as a complete tube or in segments, maintaining relatively simple structure while significantly reducing metal-to-metal contact.
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 significantly reduces frictional resistance, enhances operational efficiency, and improves assembly workability by eliminating the elastic restoring force, allowing for smoother cable movement and easier installation.
Implementation Method 1
both of the inner cable 12 and the conduit 14 are made of a metallic material. Thus, metal-to-metal friction occurs when the inner cable 12 is moved in the inner diameter portion of the conduit 14
Implementation Method 2
assembly workability is compromised by the elastic restoring force of liners in curved sections
Data Source
AI summary
A parking cable has a plurality of plastic split type liners, which reduces frictional resistance between the inner cable and a conduit among the components of the parking cable. The plurality of split type liners is press-fitted and disposed to a desired position in an inner diameter of the conduit. The plastic split type liners may serve as a guide that ensures force for smoothly moving the inner cable and also improve in-line assembly properties. A method of manufacturing the parking cable includes press fitting the plurality of split type liners between the inner cable and the conduit.