Three-dimensional sampling mechanism for fully-automatic chemiluminescence instrument

Abstract

The invention discloses a three-dimensional sampling mechanism for a fully-automatic chemiluminescence instrument. The mechanism comprises a sampling needle, a sampling arm and a spline shaft mechanism, wherein the spline shaft mechanism comprises a T-shaped rack, a rotating ball spline and a rotating motor are arranged on a horizontal arm of the T-shaped rack, a lifting motor and a vertical guide rail are arranged on a middle vertical bar, and a belt driven by the lifting motor is arranged on the outer side of the vertical guide rail; the rotating ball spline comprises an outer sleeve, a middle sleeve and a spline shaft which are in sleeved connection sequentially, the spline shaft is connected with a sampling arm, and the outer sleeve penetrates the T-shaped rack fixedly; the upper part of the spline shaft is connected with a rotating drive wheel, the lower part is connected with a vertical drive block, and the vertical drive block is connected with the vertical guide rail and the belt; an anti-slipping mechanism is arranged between the spline shaft and the middle vertical bar of the T-shaped rack; a line arranging winding prevention mechanism is arranged at the tail end of the spline shaft. The three-dimensional sampling mechanism is simple in structure and stable in performance, operates reliably, greatly reduces the abrasion loss of key parts and components and prolongs the service life of the instrument.

Description

technical field [0001] The invention relates to the technical field of biochemical analysis equipment, in particular to a three-dimensional sampling mechanism for a fully automatic chemiluminescence instrument. Background technique [0002] The three-dimensional sampling mechanism used in the automatic chemiluminescence instrument mainly includes a sampling arm. One end of the sampling arm is connected with a sampling needle, and the other end is connected with a flower shaft mechanism with lifting and rotating functions. The frame of the existing flower shaft mechanism is composed of upper cover plate, lower cover plate and side plate, which has poor strength and difficult to guarantee the accuracy; the spline shaft can realize the rotation function after being assembled with the rotating bearing fixed on the upper cover plate, However, the assembly process requirements are high, and the service life of the equipment will be shortened when there is a deviation in the assemb...

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Problems solved by technology

The frame of the existing flower shaft mechanism is composed of upper cover plate, lower cover plate and side plate, which has poor strength and difficult to guarantee the accuracy; the spline shaft can realize the rotation function after being assembled with the rotating bearing fixed on the upper cover plate, However, the requirements for the assembly process are relatively high, and the service life of the equipment will be shortened when there is a deviation in the assembly accuracy; the spline shaft has no guiding mechanism when it is moving in a straight line, the operation is not stable, and the positioning accuracy is poor; Due to insufficient self-locking force, it is easy to slide down, causing collision and damage to the sample needle; when the spline shaft rotates, the cable passing through the spline shaft is easy to be entangled, causing circuit failure

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