Bicycle Wire Control Device Bearing Mounting
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Solution Overview
Problem
Existing wire control devices for bicycles suffer from low integrative structural strength due to the embedding of the bearing within the actuation lever, leading to excessive stress on the base and potential structural damage during use.
Innovation Solution
The wire control device features a bearing installed on a bearing fixing seat within the main body, with the outer race of the bearing in contact with the annular inner wall of the fixing seat and the inner race in contact with the rotary axle of the handle assembly, thereby reducing the volume and stress applied to the main body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bearing is embedded in the actuation lever, then the actuation lever can rotate smoothly to pull the control cable, but the actuation lever becomes larger in volume and applies excessive stress to the base
Solution Approach 1:
The patent divides the wire control device into separate functional modules: the bearing is mounted on the base rather than embedded in the actuation lever, and the force transmission function is separated into a dedicated force transmission component. This segmentation allows the actuation lever to remain compact while the bearing provides smooth rotation, and the force transmission component handles stress distribution to protect the base structure.
Solution Approach 2:
The patent introduces a force transmission component as an intermediary between the actuation lever and the base. This intermediary component receives the pulling force from the actuation lever and transmits it to the base through the bearing, preventing direct stress application to the base while enabling smooth rotational motion.
2Ease of operation
If the bearing is embedded in the actuation lever, then rotation is enabled, but the actuation lever volume increases significantly
Solution Approach 1:
The patent extracts the bearing from the actuation lever and mounts it separately on the base. This extraction allows the actuation lever to maintain a compact size while still achieving smooth rotation through the bearing's interaction with the force transmission component. The bearing's rotation-enabling function is preserved without requiring it to be physically embedded in the lever.
3Strength
If the bearing is mounted on the base rather than embedded in the actuation lever, then structural strength is improved, but the device complexity increases
Solution Approach 1:
The patent combines the bearing mounting function with the base structure, and integrates the force transmission component with the actuation lever assembly. This merging approach consolidates the additional structural elements into existing components, improving structural strength while minimizing the increase in overall device complexity.
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 configuration enhances the structural strength of the wire control device by distributing stress more evenly and preventing excessive strain on the main body, thus improving durability and reliability.
Implementation Method 1
The bearing 40 is installed in a hole 32 of a body portion 31 of the actuation lever 30, and an outer race 42 of the bearing 40 is in contact with an inner diameter surface 33 of the body portion 31. An inner race 41 of the bearing 40 is in contact with an outer diameter surface 51 of an axle 50
Data Source
AI summary
A wire control device, which is disposed on a handlebar of a bicycle, includes a main body, a bearing and a handle assembly. The main body includes a bearing fixing seat having an annular inner wall. The bearing is disposed in the bearing fixing seat and includes inner and outer races. The outer race of the bearing is in contact with the annular inner wall of the bearing fixing seat. The handle assembly is rotatably disposed on the main body and has a rotary axle. The inner race of the bearing is sleeved onto and in contact with the rotary axle.