Bicycle Bar End Attachment Radial Shoe Compression
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Solution Overview
Problem
Existing bicycle bar end attachments require significant effort for attachment and removal, as they often necessitate disassembly and the use of tools to manipulate components, which can be cumbersome and time-consuming.
Innovation Solution
A bicycle bar end attachment design featuring a main body, shoe, compression member, rotation member, and transmission structure that allows for easy attachment and removal by rotating the rotation member externally, compressing the shoe between the main body and compression member, and moving it radially to secure or release the attachment to the handlebar, reducing the need for tool disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the end of the bicycle bar end shifter is removed from the main body to insert a tool, then the shifter can be attached or removed, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
A transmission structure acts as an intermediary mechanism between the rotation member and compression member. When the rotation member rotates, the transmission structure converts this rotational motion into linear motion of the compression member, which then compresses or releases the shoe without requiring disassembly. This mediator mechanism enables tool operation through the exposed portion while maintaining secure attachment.
Solution Approach 2:
The bar end attachment is divided into separable functional components: the main body, shoe, compression member, rotation member, and transmission structure. This segmentation allows the rotation member with its exposed portion to be operated independently through the handlebar, while the compression member and shoe remain engaged with the main body, enabling tool operation without full disassembly.
2Reliability
If the shoe is compressed between the main body and compression member, then the attachment is secured to the handlebar, but attachment and removal require significant effort and tool manipulation
Solution Approach 1:
The compression member is designed to move dynamically along the axial direction in response to rotation member operation. Rotating the rotation member causes the compression member to move forward and compress the shoe for secure attachment, or move backward to release the shoe for removal. This dynamic mechanism transforms a static compression system into an easily operable one through simple rotational input.
Solution Approach 2:
The manual manipulation and tool insertion required in conventional systems is replaced by a mechanical transmission system. The rotation member with exposed portion accepts tool input, and the transmission structure automatically converts this to the appropriate compression or release motion, substituting complex manual operations with an automated mechanical sequence.
3Strength
If the compression member is rotated to decrease distance and compress the shoe, then fixation is achieved, but the process requires tool insertion and manipulation
Solution Approach 1:
The rotation member and compression member are connected through the transmission structure to function as an integrated mechanism. The rotation member's exposed portion and the compression member's threading work together as a unified system, combining the external operation interface with the internal compression function into a single coordinated mechanism that achieves strong fixation without separate tool manipulation steps.
4Ease of operation
If the exposed portion is accessible from outside the handlebar, then the rotation member can be rotated with a tool without removing elements, but the structure becomes more complex
Solution Approach 1:
The rotation member serves multiple functions: it provides the exposed portion for tool operation, contains the transmitting portion for motion transmission, and controls the compression member's movement. This multi-functional design consolidates several components into one, reducing overall structural complexity while maintaining ease of operation through the exposed portion.
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
Simplifies the attachment and removal process by allowing external rotation of the rotation member to compress and decompress the shoe, reducing the effort required and enabling secure fixation without disassembling components from the main body.
Implementation Method 1
The shoe is configured to be located between the main body and an inner surface of the handlebar... The compression member includes a first pressing surface that contacts the first end of the shoe... The fixing structure arranged to hold the shoe between the compression member and the rotation member and moves the shoe in a radial direction of the handlebar to allow the main body to be fixed to the inner surface of the handlebar
Implementation Method 2
The transmission structure is arranged to transmit rotation of the rotation member to the compression member... The transmitted portion includes a first restriction surface. The transmitting portion includes a second restriction surface that opposes the first restriction surface in a rotation direction of the rotation member
Implementation Method 3
The compression member includes a second threaded portion that is threadedly engaged with the first threaded portion... When engaged with the main body, the compression member is rotated to decrease the distance between the compression member and the main body
Data Source
AI summary
A bicycle bar end attachment includes a main body, a shoe, a compression member, a rotation member, a transmission structure and a fixing structure. The main body is insertable into a bicycle handlebar, and includes a first threaded portion. The shoe is located between an inner surface of the handlebar and the main body. The compression member includes a second threaded portion engaged with the first threaded portion and a first pressing surface contacting one end of the shoe. The rotation member includes an exposed portion accessible from outside the handlebar and a second pressing surface contacting the other end of the shoe. The transmission structure transmits rotation of the rotation member to the compression member. The fixing structure holds the shoe between the compression member and the rotation member, and moves the shoe in a radial direction of the handlebar to fix the main body to the handlebar.