Drain Cleaning Machine With Switchable Collets and Wheels
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Solution Overview
Problem
Existing drain cleaning machines, particularly sectional machines, lack efficient mechanisms for controlling the movement and rotation of snakes (cables or springs) within drains, leading to inefficiencies in cleaning operations.
Innovation Solution
A drain cleaning machine with a rotating shell and a motor that can switch between activated and deactivated states, featuring a radial drive mechanism with moveable collets and a translate mechanism with moveable wheels, allowing for precise control over snake movement and rotation through engagement and disengagement states, facilitated by a selection mechanism that switches between these states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotating drum mechanism is used to feed and control the snake, then the snake can be fed into the drain, but the mechanism becomes complex and difficult to control
Solution Approach 1:
The drum mechanism is segmented into multiple independent collets that can be individually engaged or disengaged from the snake. Each collet can be independently actuated by springs and cam mechanisms, allowing selective control of different sections of the snake without requiring complex coordinated movement of the entire drum assembly.
Solution Approach 2:
The collets are designed with spring-loaded movable elements that can dynamically adjust their engagement with the snake. The cam mechanisms provide dynamic control, allowing the collets to move between engaged and disengaged states based on operational requirements, making the system adaptable and easy to control.
2Productivity
If multiple drive mechanisms are added to control both rotation and translation of the snake, then cleaning effectiveness improves, but the device complexity increases
Solution Approach 1:
The radial drive mechanism and translate mechanism are merged into a single integrated drum structure. Both the collets for radial engagement and the wheels for axial translation are mounted on the same rotating drum, allowing both functions to be controlled by a single motor and coordinated through the drum's rotation and the independent actuation of collets and wheels.
Solution Approach 2:
The drum serves multiple functions: it supports the collets for radial engagement, carries the wheels for axial translation, and provides the rotational motion for both drive mechanisms. This multi-functional design eliminates the need for separate dedicated structures for each function, reducing overall device complexity while maintaining cleaning effectiveness.
3Ease of operation
If collets are made movable toward the snake axis for engagement, then snake rotation control improves, but the mechanism complexity increases
Solution Approach 1:
The cam mechanisms are designed to provide periodic action, automatically moving the collets toward and away from the snake axis in a rhythmic cycle. This periodic movement is driven by the rotation of the drum, eliminating the need for complex continuous control systems and simplifying the engagement mechanism while maintaining reliable snake rotation control.
Data Source
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AI summary
A drain cleaning machine for moving a snake in a drain includes a rotating shell, a motor to rotate the rotating shell, and a radial drive mechanism coupled for rotation with the rotating shell and including a plurality of collets. The radial drive mechanism is switchable between an engaged state in which the one or more collets move toward a snake axis to engage the snake, and a disengaged state. A translate mechanism is coupled for rotation with the rotating shell and includes a plurality of wheels. The translate mechanism is switchable between an engaged state in which the wheels move toward the snake axis to engage the snake, and a disengaged state. A selection mechanism is configured to switch the radial drive mechanism from the disengaged state to the engaged state and configured to switch the translate mechanism from the disengaged state to the engaged state.