A Metering Pump Stroke Adjusting Mechanism

Abstract

The invention relates to a stroke regulation mechanism for a metering pump. The regulation mechanism comprises a regulation handwheel, a hollow swivel nut, a push rod shaft, a worm wheel, an inclined block, a sliding block, a crank pin, a rotary sleeve, a connecting rod and a guide shaft, wherein the regulation handwheel is connected with the front part of the hollow swivel nut through a bolt; the front part of the push rod shaft is arranged in the hollow swivel nut and the rear part of the push rod shaft is arranged in the worm wheel; the inclined block is arranged on the tail part of the push rod shaft; the sliding block is arranged in a guide slot of the worm wheel; the sliding block is matched and connected with the inclined block; the crank pin is arranged on the sliding block; the crank pin is connected with the rotary sleeve; the connecting rod is sleeved on the outer side of the rotary sleeve; and the guide shaft is matched and connected with the rotary sleeve. Compared with the prior art, the stroke regulation mechanism has high overload resistance, high linearity performance and reproduction performance, high precision, a simple structure, and is good in a machining process and low in manufacturing cost and can statically transmit load and manually perform stepless adjustment on stroke.

Description

technical field [0001] The invention relates to a stroke adjustment mechanism, in particular to a metering pump stroke adjustment mechanism. Background technique [0002] Metering pumps are widely used in food, medical, chemical and other industries. While measuring according to the needs of production, the metering range should also be able to be changed at any time and conveniently. Most of the metering pump stroke adjustment mechanisms on the market currently use N-type, L-type, and H-type sliding shaft adjustment mechanisms. With the further promotion of the application range of metering pumps, these adjustment mechanisms do not have high overload capacity, poor reproducibility, and low accuracy. , The disadvantages of manual stroke adjustment are large adjustment force. In addition, from the appearance structure, the oblique cylinder in the middle of the N-type sliding shaft is weakly stressed, and it is easy to bend and deform under high overload conditions. However,...

AI Technical Summary

Problems solved by technology

Most of the metering pump stroke adjustment mechanisms on the market currently use N-type, L-type, and H-type sliding shaft adjustment mechanisms. With the further promotion of the application range of metering pumps, these adjustment mechanisms do not have high overload capacity, poor reproducibility, and low accuracy. , Manual stroke adjustment has a large adjustment force and other disadvantages

In addition, from the appearance structure, the oblique cylinder in the middle of the N-type sliding shaft is weak, and it is easy to bend and deform under high overload conditions.

However, the L-shape and H-shafts have complex structures, are difficult to process, and have high manufacturing costs.

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