Precise two-dimensional linkage mechanism of automatic biochemical analyzer

Abstract

The invention discloses a precise two-dimensional linkage mechanism of a fully automatic biochemical analyzer, comprising an arm support (2), a main shaft (1), a rotation mechanism and a vertical movement mechanism (6), both of which are connected to On the arm support (2); the rotating mechanism includes a motor (5), a driving wheel (3) and a driven wheel (7) connected through a synchronous belt (4); the main shaft (1) is an optical axis, and the main shaft (1) The upper end is rotatably connected to the center of the driven wheel (7), and the lower end is connected to the driven wheel (7) through a rotating assembly. The lower end of the main shaft (1) is provided with a suction pipe clamping device, and the lower end of the main shaft (1) is connected to the arm through a guide mechanism. The support (2) is slidingly connected. After adopting the above structure, the main shaft realizes the axial guidance and the circumferential transmission at the same time, and neither the rotating assembly nor the main shaft has a spline shaft or spline hole. Therefore, the machining of the parts is greatly simplified, and the corresponding production cost is also greatly reduced. .

Description

technical field [0001] The invention relates to the technical field of biochemical analysis equipment, in particular to a precise two-dimensional linkage mechanism of a fully automatic biochemical analyzer. Background technique [0002] The automatic biochemical analyzer is an instrument for measuring a specific chemical composition in body fluids based on the principle of photoelectric colorimetry. Due to its fast measurement speed, high accuracy, and small consumption of reagents, it is widely used in hospitals at all levels, epidemic prevention stations, Family planning service stations and other places. Its principle is to automatically run all or part of the steps of sampling, mixing, warm bath detection, result calculation, judgment, display and print results and cleaning in the original manual operation process. Therefore, in order to realize automation, it is necessary to replace the above-mentioned operations with mechanical arms for manual operations. In the prio...

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Problems solved by technology

[0004] 1) It is the spline shaft that drives the sampling / reagent connecting piece to rotate, and the power is transmitted to the sampling / reagent connecting piece at the upper end through the spline connection between the driven wheel and the spline shaft. Therefore, the spline shaft should be processed with splines, corresponding Spline holes are also processed on the driven wheel, so in order to ensure the accuracy of the cooperation between the parts, the parts are processed with high precision and high production cost;

[0005] 2) The upper end of the main shaft is connected with the mechanical head of the biochemical analyzer. In other words, the lower end and the upper end of the main shaft are not limited, so when the main shaft slides up and down, the upper end and the lower end of the main shaft are prone to shaking, which is not conducive to Sampling, resulting in affecting the normal performance of the biochemical analyzer;

[0006] 3) In the prior art, the suction pipe of the mechanical arm passes through the center of the main shaft and leads to the liquid storage tank after being wound several times at the bottom of the main shaft. Therefore: on the one hand, since the suction pipe is wound around the bottom of the main shaft, when When the main shaft slides up and down in the vertical direction, or when the main shaft rotates circumferentially, the suction pipe will be tightened and flattened. In this way, the suction cannot be carried out normally, and even the suction pipe will be blocked, which is not conducive to the overall operation. The normal operation of the automatic biochemical analyzer; on the other hand, because the pipette is made of plastic material, after repeated tensioning actions, the material will be fatigued, and when the fatigue limit is reached, the pipette will be damaged. Therefore, Suction tube needs to be replaced, increasing cost and affecting work efficiency

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