A mechanical diaphragm metering pump diaphragm transmission mechanism

Abstract

The invention relates to a mechanical diaphragm metering pump, in particular to a transmission mechanism of a diaphragm of a mechanical diaphragm metering pump. The transmission mechanism is characterized in that a pinion is arranged on an output shaft of a motor in an interference manner, and is connected with a gear wheel by a synchronous belt, and the gear wheel is arranged on the top of a base; a hinge pin is arranged on the top of the base, an eccentric sleeve is fittingly arranged on the hinge pin, and the gear wheel is in interference fit with the eccentric sleeve; and a bearing is arranged on the eccentric sleeve and positioned on one side of the gear wheel, a connecting rod is arranged at the outer edge of the bearing in an interference manner, the diaphragm is arranged at a free end of the connecting rod, and the gear wheel drives the connecting rod to move via the eccentric sleeve. The end of the eccentric sleeve connected with the gear wheel is of a concentric structure, so that transmission of the gear wheel is facilitated; and the end of the eccentric sleeve connected with the connecting rod is of an eccentric structure, so that the connecting rod can be driven to reciprocate when the eccentric sleeve moves. Besides, a structure for converting rotational movement into linear movement is quite simple, so that production, assembly and maintenance costs are greatly reduced, and the mechanical diaphragm metering pump is high in competitive strength in markets.

Description

technical field [0001] The invention relates to a mechanical diaphragm metering pump, in particular to a diaphragm transmission mechanism of a mechanical diaphragm metering pump. Background technique [0002] As we all know, in the mechanical diaphragm metering pump, the rotary motion of the motor is almost always converted into reciprocating linear motion through a conversion mechanism. At present, domestic manufacturers basically use cam-link technology. Due to the existence of processing or assembly tolerances, no matter how precise processing equipment and high assembly level you use, it will have a certain deviation from the ideal benchmark. At present, the commonly used scheme in China is to set up a crosshead automatic guiding and centering mechanism at the connecting part of the connecting rod and the diaphragm to solve the problem of automatic centering between the radial center of the cam and the center of the diaphragm. This type of device has become very mature ...

AI Technical Summary

Problems solved by technology

But it does have many disadvantages: 1. The machining accuracy of the centered crosshead mechanism is very high, otherwise it will cause vibration-accelerated wear. At the same time, it has extremely high requirements for the hardness and toughness of the material used, and quenching and tempering treatment is required. It inevitably makes its cost very high; 2. The assembly has very high requirements, which requires the assembly personnel to have extremely high requirements in terms of technology and experience; 3. The maintenance cost is very high. Once the mechanism is worn out and scrapped, many maintenance companies basically use direct replacement

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