Bottom Drop Tee Door Catch Pivot Pin Mechanism
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Solution Overview
Problem
Conventional bottom drop hopper tees require complex mechanical levers and biasing members to secure the door, lacking a simple and effective mechanism to maintain the door in an open position during material transfer or cleaning.
Innovation Solution
A catch assembly with an engagement member and latch system that uses a pivot pin and receiving members to securely open and close the door, allowing for easy transition between positions and retaining the door in the open position for material discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mechanical levers and biasing members are used to secure the door, then the door can be secured in position, but the mechanism becomes complex and difficult to operate
Solution Approach 1:
The door securing mechanism is divided into separate functional components: a pivot pin for rotation, an oblong hole for controlled movement, and a receiving member for engagement. This segmentation allows each component to perform its specific function simply, avoiding the need for complex interconnected levers and biasing members while maintaining reliable door securing.
Solution Approach 2:
The invention extracts and eliminates the unnecessary biasing members and complex latch mechanisms from conventional designs. By using only the essential elements (pivot pin, oblong hole, receiving member), the mechanism achieves door securing reliability with minimal components, directly reducing device complexity.
2Reliability
If complex mechanical levers and latches are used to move the door between sealed and unsealed positions, then the door can be secured, but the operation becomes difficult and time-consuming
Solution Approach 1:
The door mechanism uses dynamic movement through the oblong hole that allows the pivot pin to move freely when the door is open, enabling easy operation. When closed, the geometry of the oblong hole naturally constrains the pin, providing reliable positioning without complex latches. This dynamic adaptation simplifies operation while maintaining reliability.
Solution Approach 2:
The oblong hole geometry automatically performs the function of a latch mechanism. When the door is in the open position, the pivot pin can move along the oblong hole's path, and gravity or spring force naturally guides it to engage with the receiving member, eliminating the need for operator intervention with complex latches and making operation simple.
3Reliability
If removable pins and latches are used to secure the door in the open position, then the door can be held open, but the mechanism requires multiple components that increase complexity
Solution Approach 1:
The invention merges the pivot pin and latch function into a single integrated component. The pivot pin serves both as the rotation axis and as the engagement element that interacts with the receiving member to hold the door open. This consolidation eliminates the need for separate removable pins and latches, reducing component count while maintaining reliable open position retention.
Solution Approach 2:
The pivot pin performs multiple functions: it acts as the rotation axis for door movement, provides the engagement element for the receiving member to hold the door open, and serves as a structural connector. This multi-functionality eliminates the need for multiple specialized components, reducing mechanism complexity while ensuring reliable door positioning.
Data Source
AI summary
A catch for securing a door to an object includes an engagement member connected to the door engaging a receiving member of a mount on the object. The door includes a first arm with an oblong hole for pivoting about a pin connected to the mount, and an engagement pin. Moving the door from a closed position causes the engagement pin to rotate with the door about the pivot pin. The door slides downward along the pivot pin as the pivot pin travels within the oblong opening, and the engagement pin makes contact with the receiving member, thereby retaining the door in an open position. Moving the door upward moves the pivot pin downward within the oblong opening disengaging the engagement pin from the receiving member, allowing the door to rotate to a closed position. A latch opposite the first arm retains the door in a closed position.