Pneumatic Puller Cylinder Reciprocation for Impact Force and Safety
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Solution Overview
Problem
Conventional pin pullers rely on manual operation, which is labor-intensive and time-consuming, and may result in insufficient impact force to remove pins, while pneumatic versions can be unsafe due to rapid reciprocation.
Innovation Solution
A pneumatic puller design that includes a shell unit, a pulling member, a valve unit, and a cylinder, where the cylinder moves between reverse positions to control gas flow and generate an impact force for pulling objects, while ensuring safety by containing the moving parts within a shell unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If manual operation is used to move the sliding portion, then the device is simple and safe, but the impact force is insufficient and labor-intensive
Solution Approach 1:
The patent employs a pneumatic system where a cylinder moves back and forth under gas pressure to drive the piston, generating substantial impact force automatically. This eliminates manual labor while providing sufficient force to remove pins effectively.
2Force
If gas pressure is applied to the sliding portion, then the impact force is enhanced, but the sliding portion reciprocates rapidly causing safety hazards
Solution Approach 1:
The patent extracts the high-speed reciprocating component (cylinder) from the external environment and places it inside a protective shell unit. The shell unit isolates the dangerous moving parts from operators and surrounding objects, eliminating safety hazards while maintaining the enhanced impact force generated by pneumatic operation.
3Productivity
If the cylinder moves rapidly between reverse positions, then the productivity is improved, but the safety is compromised due to potential contact with persons or objects
Solution Approach 1:
The patent implements a nested structure where the cylinder and piston are housed within the shell unit. This nested arrangement allows the cylinder to reciprocate rapidly for high productivity while being contained within the protective shell, preventing contact with external persons or objects and thus maintaining safety.
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 pneumatic puller effectively generates a consistent and controlled impact force for efficient removal of objects, reducing labor and time requirements while enhancing safety by containing the moving parts.
Implementation Method 1
The cylinder is movable along the fixed section between a first reverse position and a second reverse position relative to the piston when urged by pressure of a gas
Implementation Method 2
The cylinder moves along the fixed section away from the exposed section and hits the piston when moving from the first reverse position to the second reverse position
Data Source
AI summary
A pneumatic puller includes a shell unit, a pulling member that has a fixed section and an exposed section, a piston that is fixedly connected to the fixed section, a directional valve assembly that is movably mounted to the piston, and a cylinder that is sleeved on the fixed section. The cylinder and the piston define a first chamber and a second chamber. The cylinder is movable along the fixed section between a first reverse position and a second reverse position relative to the piston when urged by pressure of a gas. The cylinder abuts against one side of the piston and the directional valve assembly releases the gas into the second chamber when the cylinder is in the first reverse position. The cylinder moves along the fixed section away from the exposed section and hits the piston when moving from the first reverse position to the second reverse position.