Child Carrier Wheel Shock Absorption Using Elastic Bending Deformation

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Solution Overview

Problem

Existing child carriers with wheels face challenges in shock absorption due to short shock absorption strokes, leading to inadequate damping and buffering effects when encountering uneven terrain, affecting safety and comfort, and complex shock absorption structures increase manufacturing costs and hinder normal travel.

Innovation Solution

A wheel shock absorption structure featuring a wheel shaft, wheel seat, and an elastic shock absorber with a bending deformation mechanism that allows the wheel to slide and rotate, providing a long and effective shock absorption stroke without compromising normal travel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a complicated shock absorption structure is disposed between the wheel seat and the wheel to acquire a strong shock absorbing effect, then the shock absorption performance is improved, but manufacturing cost is greatly increased and normal traveling is impeded

Engineering Contradiction:

Improveshock absorption performanceVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The shock absorption function is segmented into two independent components: the elastic structure attached to the wheel shaft and the buffer structure attached to the wheel seat. This segmentation allows each component to perform its specific function independently, achieving effective shock absorption without requiring a complicated integrated structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The elastic structure is extracted as a separate component from the wheel assembly, and the buffer structure is extracted as a separate component from the wheel seat. This extraction simplifies the overall structure while maintaining shock absorption performance, as each extracted component can be optimized independently.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

Engineering Contradiction:

Improveshock absorption performanceVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The elastic structure and buffer structure are designed as simple, inexpensive components that can be easily manufactured and replaced if needed. The elastic structure uses a simple elastic element, and the buffer structure uses a simple buffer element, avoiding the need for expensive complex mechanisms while maintaining effective shock absorption.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Length of stationary object

If the shock absorption structure has a short shock absorption stroke, then the structure remains compact, but the damping and buffering effect is greatly affected

Engineering Contradiction:

Improveshock absorption strokeVSAvoiddamping effect

Core Design Contradiction:

Length of stationary objectVSReliability

Solution Approach 1:

The elastic structure is designed to be elastically deformable, allowing it to dynamically extend and contract during shock absorption. The buffer structure is designed to be movable relative to the wheel seat, enabling it to dynamically adjust its position during impact events. This dynamic design allows for an extended effective shock absorption stroke without compromising structural compactness during normal operation.

Inventive Principle:

Principle #15Dynamics

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 ensures improved safety and comfort performance by providing a better shock absorbing effect through adaptive adjustment to uneven surfaces, maintaining normal travel without increasing manufacturing costs or complexity.

Implementation Method 1

an elastic structure, a lower end of the shock absorber is rotatably connected with the wheel shaft; when the wheel travels through the uneven road surface, the wheel eccentrically rotates at a certain angle except for sliding relative to the wheel seat, so as to drive the wheel shaft to slide and allow eccentric rotation of the upper and lower ends of the shock absorber synchronously, a distance between the upper and lower ends of the shock absorber is gradually shortened, so that the shock absorber undergoes elastic deformation

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

a lower end of the wheel seat is provided with an obliquely arranged slot for the wheel shaft to slide along

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS12005949B2Wheel shock absorption structure and child carrier

Publication Date: 2024.06.11 WONDERLAND SWITZERLAND AG

AI summary

A wheel shock absorption structure and a child carrier having the wheel shock absorption structure, including a wheel shaft and a wheel seat connected with a frame, and a lower end of the wheel seat is rotatably connected with a wheel through the wheel shaft. Further including a shock absorber with an elastic structure, an upper end of the shock absorber is removably connected with an upper end of the wheel seat, and the shock absorber rotates synchronously along with the wheel seat; a lower end of the shock absorber is rotatably connected with the wheel shaft which is slidably connected with the lower end of the wheel seat. The shock absorber is driven by sliding of the wheel shaft to generate recoverable elastic deformation to provide damping and buffering. The bending deformation of the shock absorber ensures that the wheel shock absorption structure has a better shock absorbing effect.