Oil-free pump for high-pressure cleaning machine

Abstract

The invention discloses an oil-free pump for a high-pressure cleaning machine. The oil-free pump comprises a pump body, a transmission shaft and a rotating shaft; based on the using direction, the rotating shaft can be rotationally inserted into the pump body; the transmission shaft is fixedly connected with the rotating shaft; the oil-free pump is also provided with an eccentric wheel, a rotary ring bearing, a rotary ring, an elastic steel plate, plungers and plunger bearings; the eccentric wheel is fixedly arranged outside the rotating shaft; the rotary ring bearing is sleeved outside the eccentric wheel; the rotary ring is sleeved outside the rotary ring bearing; the outer side wall of the rotary ring is fixedly connected with the middle section of the side wall of the elastic steel plate; two end walls of the elastic steel plate are fixedly connected with the plungers respectively; and the plungers can be inserted into the plunger bearings in the axial direction in a sliding manner. A cam of the oil-free pump does not produce hard friction with the rotary ring, and hard friction is also not produced when the rotary ring drives the plungers to move axially, so that a large amount of lubricating oil is prevented from being used, oil-free transmission is realized, a series of problems that water is leaked to an oil tank due to the sealing problem and the oil tank leaks oil and the like are avoided, the transmission efficiency is greatly improved, and the friction loss is reduced.

Description

technical field [0001] The invention relates to a high-pressure cleaner pump, in particular to an oil-free pump for a high-pressure cleaner. Background technique [0002] The high pressure washer pump is the main component of the whole high pressure washer. The high-pressure cleaner generates high-pressure water flow through it to achieve the cleaning effect. At present, there are many kinds of high-pressure cleaning machine pumps in the Chinese market, and the pressure is mostly ranging from 7 to 25MPa, but they are mainly divided into two types: one is the swash plate pump; the other is the crankshaft pump. But no matter which one it is, there is oil in the pump, and there is oil transmission. This pump will have some problems: [0003] 1. Oil and water are mixed together. Once the water seal is not good, the water will run into the fuel tank; [0004] 2. The oil tank is not well sealed and easy to leak oil; [0005] 3. When the oil rotates at high speed, it is easy t...

AI Technical Summary

Problems solved by technology

[0003] 1. Oil and water are mixed together. Once the water seal is not good, the water will run into the fuel tank;

[0004] 2. The oil tank is not well sealed and easy to leak oil;

[0005] 3. When the oil rotates at high speed, it is easy to generate oil pressure and oil gas;

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