Peristaltic Pump Rotor With Adjustable Manual Torque Lever
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Solution Overview
Problem
Existing peristaltic pumps for extracorporeal blood treatment lack a mechanism for reliable emergency operation with a simple structure, particularly in scenarios where varying manual drive torque is necessary.
Innovation Solution
The first actuation element is mounted at least indirectly on the main rotor body and can be moved between different actuation positions, adjusting the lever arm length to accommodate varying manual drive torque needs, allowing for easy manual rotation of the rotor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed actuation element is used on the rotor, then the structure remains simple, but the manual drive torque cannot be adjusted for different emergency operation scenarios
Solution Approach 1:
The actuation element is designed with movable sections that can change position relative to the rotor axis, transforming a static structure into a dynamic one. This allows the lever arm length to be adjusted between a first position (closer to axis) and a second position (farther from axis), enabling adaptation of manual drive torque to different emergency operation scenarios while maintaining structural simplicity through guided linear movement.
2Shape
If the actuation section is positioned closer to the rotor axis, then the structure is more compact, but the manual rotary actuation becomes more difficult due to reduced lever arm length
Solution Approach 1:
The actuation element incorporates linearly movable sections that can dynamically adjust their radial distance from the rotor axis. When easier actuation is needed, the movable section extends to a second position with greater lever arm length. When compactness is prioritized, it retracts to a first position closer to the axis. This dynamic repositioning resolves the contradiction between compact shape and ease of operation.
3Ease of operation
If the actuation section is positioned farther from the rotor axis, then the manual rotary actuation is easier due to increased lever arm length, but the structure becomes more complex and less compact
Solution Approach 1:
The actuation element uses linear guides to enable simple, constrained linear movement of its sections, achieving dynamic adjustment of lever arm length without complex mechanisms. The movable section can extend to a second position for easier actuation or retract to a first position for compactness, maintaining structural simplicity through straightforward guided motion rather than complex linkages or mechanisms.
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
This design ensures reliable emergency operation by enabling easy manual rotation of the rotor with adjustable torque, maintaining ergonomic accessibility and a simple structure.
Implementation Method 1
the first actuation element can be moved in a manner adapted to the situation between different actuation positions, namely the first and the second actuation position. The invention is based on the insight that, depending on the situation, a comparatively greater or smaller manual drive torque may be necessary and/or desirable for rotating the rotor. By virtue of the mobility of at least some section or sections of the first actuation element, the lever arm length of the first actuation section which is effective about the rotor axis can be changed in a simple manner.
Data Source
AI summary
A peristaltic pump includes a housing and a rotor that rotates about a rotor axis. The rotor has a rotor body and a pump. The housing has a cut-out in which the rotor is accommodated and a support surface extending about the rotor axis. The support surface supports a tube segment that is introducible between the rotor and support surface. The rotor has a first element for manually actuating the rotor and a first portion for applying a manual rotation actuation force. The first element is mounted on the rotor body and is movable relative to the rotor body between a first position, in which the first portion is spaced from the rotor axis by a first length, and a second position, in which the first portion is spaced from the rotor axis by a second length, the second length being greater than the first length.