Folding Bicycle Towing Device with Rotating Shaft

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Solution Overview

Problem

Current bicycle towing devices increase the turning radius of the small bicycle, restrict the height and structure of the big bicycle, require complex disassembly, and hinder the use of the rear seat for carrying goods or people, due to their design limitations.

Innovation Solution

A bicycle towing device featuring a folding connecting frame with a rotating shaft between the big and small bicycles, allowing for easy disassembly and folding, reducing the turning radius, and maintaining the functionality of the big bicycle's rear seat.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the arc-shaped connecting rod is used to fix the supporting rod of the big bicycle and the front part of the small bicycle, then the connection and towing function is realized, but the turning radius increases which leads to increased danger when turning

Engineering Contradiction:

Improvesafety during turningVSAvoidturning radius

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The connecting frame is divided into multiple segments (front bicycle positioning connecting frame, intermediate connecting frame, rear support connecting rod) that can fold and rotate independently, allowing the small bicycle to follow the big bicycle's turning path more closely without increasing the overall turning radius

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connecting frame incorporates rotating shafts and hinge members that enable dynamic adjustment of the frame's configuration during turning, allowing the small bicycle to adapt its position relative to the big bicycle to maintain a safe turning radius

Inventive Principle:

Principle #15Dynamics

2Reliability

If the connecting rod is connected to the connecting rod under the seat of the big bicycle, then the towing function is achieved, but the design restricts the height and structure of the big bicycle and limits the use of the rear seat

Engineering Contradiction:

Improvetowing functionVSAvoidbig bicycle structure flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The connection point is extracted from the seat area and relocated to the rear connecting shaft of the big bicycle, eliminating the restriction on seat height and structure while maintaining the towing function

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The rear connecting shaft serves dual purposes: it is an existing structural component of the big bicycle that can be used for connection, and the connecting frame can be folded to allow the rear seat to be used for carrying goods or people when towing is not needed

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If the connecting rod is used for connection, then the towing function is realized, but after separation the connecting rod cannot be retracted which increases danger behind the big bicycle

Engineering Contradiction:

Improvetowing functionVSAvoiddanger behind big bicycle

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The connecting frame is designed with a folding mechanism that allows it to be collapsed and stored behind the big bicycle after separation, eliminating the hazard of a persistent connecting rod and allowing the big bicycle to be detached without leaving obstacles behind

Inventive Principle:

Principle #15Dynamics

4Stability of the object's composition

If the front of the small bicycle is firmly fixed to prevent touching the ground, then stable connection is achieved, but complex connection methods and special tools are needed for disassembly

Engineering Contradiction:

Improveconnection stabilityVSAvoiddisassembly convenience

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The connection system is segmented into modular components (clamping arms, fastening components, hinge members) that can be independently assembled and disassembled, allowing stable connection during use while enabling easy separation without special tools

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fastening components are designed to be manually operated and easily released by the user without requiring special tools, making the disassembly process simple while maintaining stable connection during normal operation

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12043340B2Bicycle towing device

Publication Date: 2024.07.23 CHEN YUXUAN

AI summary

The present disclosure discloses a bicycle towing device, which comprises a folding connecting frame and a small bicycle connecting frame, wherein the front end of the folding connecting frame is clamped to the rear connecting shaft of a big bicycle and locked and positioned by a fastening component, the rear end of the folding connecting frame is connected with a hook at the front end of the small bicycle connecting frame, the rear end of the small bicycle connecting frame is clamped and connected to the small bicycle frame, the front wheel of the small bicycle is lapped on the folding connecting frame and positioned motionless without contacting with the ground during connection, the folding connecting frame is provided with a rotating shaft, and the rotating shaft is located between the rear wheel of the big bicycle and the front wheel of the small bicycle.