Pressing Pump Sleeve-Rod Structure for Piston Deflection Control
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Solution Overview
Problem
Existing pressing pumps experience deflection and floating of the piston due to oblique pressing, leading to potential leakage and requiring high production costs for improved accuracy, which current solutions fail to effectively address.
Innovation Solution
A pressing pump design featuring a movable connection structure between the pressing sleeve and pump rod with a limiting protrusion and groove arrangement, allowing relative movement and absorbing oblique deflection, ensuring stable piston operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pressing sleeve and connecting rod are fixed through interference fit to ensure stable force transmission, then the connection stability is improved, but the piston deflection and floating increase when oblique pressure is applied
Solution Approach 1:
The patent introduces a movable connection structure between the pressing sleeve and pump rod, allowing relative movement between the two components. This dynamic connection enables the system to adapt to oblique pressures by permitting controlled movement, thereby preventing piston deflection and floating while maintaining connection stability through the limiting protrusion and groove arrangement.
2Reliability
If the fit accuracy between piston and pump body is improved to prevent leakage, then the sealing reliability is improved, but the production cost increases significantly
Solution Approach 1:
The patent introduces a limiting protrusion and groove structure as an intermediary mechanism between the pressing sleeve and pump rod. This intermediary component absorbs the oblique deflection forces before they can affect the piston, thereby maintaining sealing reliability without requiring high-precision fits between the piston and pump body, thus controlling production costs.
3Power
If the pressing sleeve and pump rod are rigidly connected to ensure force transmission, then the power transmission efficiency is improved, but the piston floating and deflection increase under oblique pressure
Solution Approach 1:
The patent employs a movable connection structure that allows controlled relative movement between the pressing sleeve and pump rod. This dynamic connection maintains power transmission efficiency by permitting the system to adapt to oblique pressures through controlled movement, while preventing piston floating and deflection that would occur with rigid connections.
Data Source
AI summary
A pressing pump includes a pump case, a piston, a pump rod, and a pressing sleeve, where a pumping cavity is formed within the pump case; the piston is arranged within the pumping cavity and connected to the piston on an inner wall of the pumping cavity; a first end of the pump rod is connected to the piston; the pressing sleeve is sleeved on an outer circumference of a second end of the pump rod; a gap is formed between the pressing sleeve and the pump rod; and an inner circumference of the pressing sleeve and an outer circumference of the pump rod are clamped with each other to realize two-way motion limitation in a length direction of the pump rod. The pressing pump can maintain stable and smooth operation of the piston in the pressing process of the pressing pump.