Spring Balancer Coupling Structure to Prevent End Plate Pop-Out
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Solution Overview
Problem
Existing robot balancer devices using compression coil springs face issues with rear end plate popping out due to breakage or deterioration, leading to stress-induced fatigue and potential structural failure.
Innovation Solution
A balancer device design featuring a coupling member with play larger than the rod's stroke, comprising a compression coil spring, a movable member, and a coupling member that prevents rear end plate popping out by ensuring a gap between abutment sections, reducing stress accumulation and allowing for easy assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the rear end plate is rigidly connected to the housing, then structural stability is improved, but stress-induced fatigue and popping out occur due to repeated compression and expansion
Solution Approach 1:
The coupling member is divided into a first coupling piece fixed to the rear end plate and a second coupling piece fixed to the movable member, creating a segmented connection that allows relative movement while maintaining structural integrity
Solution Approach 2:
The coupling member acts as an intermediary between the rear end plate and the movable member, absorbing stress and preventing direct rigid connection that would lead to fatigue and popping out
2Ease of manufacture
If the coupling member has play larger than the rod's stroke, then ease of assembly and disassembly is improved, but device complexity increases
Solution Approach 1:
The coupling member is designed with dynamic play that accommodates the rod's stroke range, allowing the system to adapt during operation while maintaining simple assembly and disassembly procedures
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
Prevents rear end plate popping out, reduces stress-induced fatigue, and enhances assembly efficiency while maintaining structural integrity and reducing component deterioration.
Implementation Method 1
a compression coil spring that is disposed between the movable member and the rear end plate
Data Source
AI summary
A balancer device includes a housing including a tubular body section and also including a front end plate and a rear end plate that block opposite ends of the body section in a direction of an axis; a rod that extends through the front end plate in a thickness direction thereof and that is supported such as to be movable in the direction of the axis; a movable member that is fixed to the rod and that is accommodated within the housing; a compression coil spring that is disposed between the movable member and the rear end plate; and a coupling member that couples the rod and the rear end plate to each other with play that is larger than a stroke of the rod in the direction of the axis.