Variable Length Actuator Linkage for Work Machine Attachment
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Solution Overview
Problem
Existing linkage arrangements for connecting attachments to work machines, such as excavators, face limitations in kinematics and attachment mechanisms, necessitating an alternative solution that enhances operational flexibility and functionality.
Innovation Solution
A linkage arrangement featuring a first linkage group with upper and lower arms connected via a variable length actuator, allowing for kinematic adjustments between the machine and attachment pivot points, enabling the attachment to be lowered or raised relative to the machine, and accommodating various operational scenarios like dozing, leveling, and stabilizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional linkage arrangement is used to connect attachment to work machine, then the structure is simple and easy to manufacture, but the kinematic flexibility and operational versatility are limited
Solution Approach 1:
The actuator is designed with variable length capability, allowing the linkage arrangement to dynamically adjust its configuration. This enables the system to adapt to different operational requirements (dozing, leveling, stabilizing) by changing the actuator length, thereby achieving infinite positions and enhanced kinematic flexibility without requiring multiple fixed linkage structures
Solution Approach 2:
The linkage arrangement is designed to perform multiple functions through a single integrated structure. The same linkage group with variable length actuator can execute dozing, leveling, and stabilizing operations, eliminating the need for separate specialized mechanisms for each function and reducing overall system complexity while increasing versatility
2Length of moving object
If the actuator length is increased to lower the attachment relative to the work machine, then the attachment can reach lower positions, but the control precision and stability may be compromised
Solution Approach 1:
The system controls attachment position by changing the actuator length parameter. By varying the actuator length, the attachment can be precisely positioned at any height between the maximum and minimum limits. This continuous parameter adjustment provides both the extended range (lower positions) and the control precision needed for stable operation
Solution Approach 2:
The linkage arrangement incorporates pivot points and mechanical linkages that provide inherent feedback on attachment position. As the actuator length changes and the attachment moves, the geometric relationships between pivot points naturally indicate the current position, enabling stable and controlled movement throughout the full range of motion including lowered positions
Data Source
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Figure 3A
AI summary
A linkage arrangement (10) is provided for moveably connecting an attachment (6) to a work machine (8). The linkage arrangement includes linkage group (12) having an upper arm (14) with a machine pivot point (20) for connecting to the work machine and an attachment pivot point (22) for connecting to the attachment. The linkage group (14) further has a lower arm (16) with a machine pivot point (24) for connecting to the work machine (8) and an attachment pivot point (26) for connecting to the attachment (6). An actuator (30) extends between the upper and lower arms.