Pipetting Device Portal Frame Motorized Lead Screw Coaxiality
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Solution Overview
Problem
Traditional pipetting devices suffer from low working efficiency, precision, and accuracy due to inconsistent piston rod and pipetting sleeve matching, leading to jamming issues and laborious maintenance, affecting liquid suction and injection precision.
Innovation Solution
A pipetting device with a portal frame, bearing device, and driving mechanism that includes a motorized lead screw system for precise up-and-down movement of the feed pump, ensuring coaxiality and stability, along with a liquid suction and injection mechanism that uses a push handle and elastic member for efficient liquid handling, and a tip head removing mechanism for hygiene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple piston rods are driven by a driving mechanism to reciprocate simultaneously in multiple pipetting sleeves, then pipetting efficiency is improved, but the matching precision between piston rods and pipetting sleeves deteriorates, leading to jamming and reduced liquid suction and injection precision
Solution Approach 1:
The patent divides the system into independent modules where each piston rod and pipetting sleeve pair operates independently. The driving mechanism is segmented to control each piston rod separately, allowing precise individual adjustment and matching, thereby maintaining high precision while enabling simultaneous multi-channel operation.
Solution Approach 2:
The patent introduces a dynamic adjustment mechanism that allows real-time coordination between piston rods and pipetting sleeves during operation. The driving mechanism can dynamically adjust the reciprocating motion of each piston rod to match the specific requirements of its corresponding pipetting sleeve, ensuring optimal performance and preventing jamming.
2Device complexity
If manual pushing of piston rod is used in traditional pipetting device, then device complexity is reduced, but working efficiency and liquid suction and injection precision deteriorate
Solution Approach 1:
The patent replaces the manual mechanical pushing operation with an automated driving mechanism that uses controlled reciprocating motion. This substitution maintains relatively simple device architecture while dramatically improving working efficiency and liquid suction and injection precision through automated, precise control of the piston rod movement.
3Speed
If multiple pairs of piston rods and pipetting sleeves work simultaneously, then pipetting speed is improved, but the system stability deteriorates due to inconsistency and increased jamming
Solution Approach 1:
The patent incorporates feedback mechanisms that monitor the operation status of each piston rod and pipetting sleeve pair. The driving mechanism receives feedback information and adjusts the reciprocating motion accordingly to maintain consistency across all channels, preventing jamming and ensuring stable operation during simultaneous multi-channel pipetting.
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 device achieves high precision and automation in liquid suction and injection, reduces jamming, and facilitates efficient maintenance with improved coaxiality and stability, enabling simultaneous operation of multiple channels for enhanced pipetting efficiency.
Implementation Method 1
an elastic member arranged at a lower end of the push handle, the pump rod between the barrier and the elastic member is sleeved with a buffer
Implementation Method 2
an output end of the first motor is connected to a vertical first lead screw, the first bracing plate is fixedly arranged with first lead screw nuts engaged with the first lead screw
Data Source
AI summary
A pipetting device includes a portal frame. The portal frame is arranged with a bearing device for bearing a feed pump, a driving mechanism for driving the bearing device to move up and down, and a liquid suction and injection mechanism for sucking or injecting liquid by the feed pump. The bearing device includes a bearing plate with receiving grooves. The driving mechanism includes a first bracing plate connected to the bearing plate, and the frame is arranged with a first motor. The liquid suction and injection mechanism includes a second bracing plate. The first bracing plate is arranged with a second motor. The first motor and the second motor are connected to a PLC.