Bicycle Wheel Axle Rack Mounting Without Frame Drilling

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Solution Overview

Problem

Conventional bicycle racks require drilling holes into the frame for installation, causing irreversible aesthetic damage and inconvenience.

Innovation Solution

A bicycle wheel axle rack kit featuring a wheel axle with pre-formed connection holes and a rack with corresponding perforations, allowing installation without drilling, using threaded connectors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional bicycle racks are installed by drilling holes into the frame, then the rack can be securely mounted, but the frame suffers irreversible aesthetic damage and structural compromise

Engineering Contradiction:
Improverack mounting securityVSAvoidframe aesthetic damage
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention divides the mounting system into separate components: the rack body, the wheel axle, and connectors. The rack is mounted to the wheel axle rather than directly to the frame, separating the mounting function from the frame structure. This allows secure rack installation without drilling the frame, thus maintaining frame aesthetics while ensuring rack stability through the connector-axle-rack assembly.

Inventive Principle:
Principle #1Segmentation

2Reliability

If drilling holes is used for rack installation, then the rack can be firmly attached to the frame, but the installation process becomes irreversible and time-consuming

Engineering Contradiction:
Improverack attachment firmnessVSAvoidinstallation reversibility
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The invention employs detachable connectors that can be assembled and disassembled, transforming the static, irreversible drilling process into a dynamic, reversible connection system. The connectors insert through perforations and can be removed or repositioned without permanent damage, allowing flexible installation and future modifications while maintaining secure attachment during use.

Inventive Principle:
Principle #15Dynamics

3Object-affected harmful factors

If standard wheel axles are used without modification, then the original bicycle structure is preserved, but rack installation becomes impossible without drilling the frame

Engineering Contradiction:
Improveframe structure preservationVSAvoidrack installation capability
Core Design Contradiction:
Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The invention introduces the wheel axle with connection holes as an intermediary component between the frame and the rack. Instead of directly attaching the rack to the frame (which requires drilling), the axle serves as a mediator with pre-formed connection holes that accept connectors. This intermediary approach enables rack installation while preserving the original frame structure, as the axle itself becomes the mounting substrate.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

Enables secure and aesthetic installation of bicycle racks without frame damage, enhancing user experience and versatility.

Implementation Method 1

a plurality of connectors, each detachably inserted through the perforation of the respective supporting section and the corresponding connection hole of the wheel axle

Methodology Applied
Scientific EffectFriction: Friction

Implementation Method 2

each of the connection holes contains threads therein, and the plurality of the connectors features a screw-like configuration with threads

Methodology Applied
Scientific EffectMechanical Fastener: Mechanical Fastener

Data Source

PatentEP4650258A1Bicycle wheel axle rack kit
Publication Date: 2025.11.19 TSAI JUNG ENTERPRISE
  • EP4650258A1 patent drawingFigure 1
  • EP4650258A1 patent drawingFigure 2
  • EP4650258A1 patent drawingFigure 3

AI summary

The present invention provides a bicycle (100) wheel axle (2) rack (1) kit, characterized in that it comprises a rack (1) that includes a cargo placement section (11) and supporting sections (12) respectively connected to both sides of the cargo placement section (11), each of the supporting sections (12) having a perforation (121) at one end thereof away from the cargo placement section (11); a wheel axle (2) having connection holes (21) respectively at both ends thereof; and a plurality of connectors (3), each detachably inserted through the perforation (121) of the respective supporting section (12) and the corresponding connection hole (21) of the wheel axle (2). Accordingly, consumers only need to remove the original bicycle (100) wheel axle (2) and replace it with the wheel axle (2) provided by the present invention. This allows the connectors (3) to be inserted through the perforations (121) of the supporting sections (12) and the corresponding connection holes (21) of the wheel axle (2), enabling the rack (1) of the present invention to be installed on the bicycle (100) without the need to drill holes in the frame.