Self-Leveling Mechanism for Wheel Loader Lifting Arrangement

Solution Overview

Problem

Construction machines, such as wheel loaders, face limitations in lifting capacity due to weight distribution and stability issues, which affect operational efficiency and require increased weight and power, leading to decreased drivability and efficiency.

Innovation Solution

A self-level mechanism with a kinematic chain system that compensates for tilting movements of equipment during pivoting, allowing for a more efficient lifting path without increasing the machine's weight or power requirements, by using a Z-kinematic chain and a support element connected to the main arm and frame, enabling a vertical lifting path and reducing tilting moments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If the total weight of the construction machine is increased to enhance lifting capacity, then the lifting capacity is improved, but the drivability and overall efficiency deteriorate

Engineering Contradiction:

Improvelifting capacityVSAvoidoverall efficiency

Core Design Contradiction:

ForceVSUse of energy by moving object

Solution Approach 1:

The lifting arrangement is divided into functionally independent components: a lifting unit for vertical movement and a tilting unit for angular adjustment. This segmentation allows each unit to be optimized independently, enabling enhanced lifting capacity through the tilting unit without increasing the overall machine weight, thereby maintaining drivability and efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention introduces a tilting dimension to the traditional vertical lifting mechanism. By adding the ability to tilt the load-carrying equipment independently of vertical position, the system achieves enhanced lifting capacity through spatial reorientation rather than单纯的 weight increase, improving efficiency by utilizing dimensional freedom.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Force

If the total weight of the construction machine is increased to enhance lifting capacity, then the lifting capacity is improved, but the drivability deteriorates

Engineering Contradiction:

Improvelifting capacityVSAvoiddrivability

Core Design Contradiction:

ForceVSEase of operation

Solution Approach 1:

The lifting arrangement is divided into functionally independent components: a lifting unit for vertical movement and a tilting unit for angular adjustment. This segmentation allows each unit to be optimized independently, enabling enhanced lifting capacity through the tilting unit without increasing the overall machine weight, thereby maintaining drivability and efficiency.

Inventive Principle:

Principle #1Segmentation

3Force

If weight distribution variations or total weight increase are implemented to enhance lifting capacity, then the lifting capacity is improved, but the stability is negatively affected

Engineering Contradiction:

Improvelifting capacityVSAvoidstability

Core Design Contradiction:

ForceVSStability of the object's composition

Solution Approach 1:

The lifting arrangement is divided into functionally independent components: a lifting unit for vertical movement and a tilting unit for angular adjustment. This segmentation allows each unit to be optimized independently, enabling enhanced lifting capacity through the tilting unit without increasing the overall machine weight, thereby maintaining drivability and efficiency.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3199711B8Lifting arrangement with self-levelling mechanism for a construction machine

Publication Date: 2019.07.10 GUANGXI LIUGONG MASCH CO LTD

AI summary

Disclosed is a self-level mechanism for controlling a tilting movement of an equipment (15) mounted to an equipment connector (5) of a main arm (3) of a lifting arrangement of a construction machine, preferably a wheel loader (1), upon pivoting said main arm (3). The self-level mechanism is configured to at least partially compensate any tilting movement of the equipment (15).