Pump unit and high pressure cleaning machine

Abstract

The invention discloses a pump unit and a high pressure cleaning machine. The pump unit comprises a first cavity, a second cavity, a third cavity, a plunger and a crank connecting rod mechanism. The second cavity comprises a crank cavity and a plunger cavity which communicate with each other, the crank cavity is integrally formed, and the plunger cavity communicates with the first cavity. The third cavity is connected with the crank cavity and communicates with the plunger cavity, and one-way valves for communicating or blocking are separately arranged between the first cavity and the plungercavity and between the third cavity and the plunger cavity. The plunger is disposed in the plunger cavity for driving the one-way valves to communicate or block. The crank connecting rod mechanism isdisposed in the crank cavity and connected with the plunger to drive the plunger to perform linear reciprocating motion in the plunger cavity. The high pressure cleaning machine comprises a shell anda battery pack. The shell is internally provided with a motor, a transmission mechanism connected to the motor and the pump unit driven by the transmission mechanism. The battery pack is mounted on ahandle portion of the shell, the handle portion is provided with a push type switch, and the switch is electrically connected with the battery pack.

Description

technical field [0001] The invention relates to the field of cleaning technology, in particular to a pump unit and a high-pressure cleaning machine. Background technique [0002] A high-pressure cleaner is a machine in which a power unit drives a plunger pump to generate pressurized water to wash the surface of an object. It can peel off and wash away dirt to achieve the purpose of cleaning the surface of an object. Compared with the traditional manual cleaning method, the high-pressure cleaner reduces water consumption, saves a lot of time, and has a better cleaning effect. Nowadays, the application of high-pressure cleaners is becoming more and more extensive, and it is widely used in various fields of life such as cleaning cars, gardens, roads, and fences. The cleaning machines currently on the market generally have the following defects: the cleaning machine does not have a self-priming function, which leads to limited use, and needs to be connected to an external water...

AI Technical Summary

Problems solved by technology

The cleaning machines currently on the market generally have the following defects: the cleaning machine does not have a self-priming function, which leads to limited use, and needs to be connected to an external water source with pressure input or tap water; the cleaning machine does not have a separate water inlet structure, and needs to be connected to a nearby water source Work; the washing machine is moved through a single handle or wheel structure, the storage structure is large, and it takes up a lot of space; the washing machine is integral, and the water storage device (bucket) is permanently combined with the body, which cannot be separated. The overall space of the machine is very large, and it is inconvenient to store and place. Due to the large size, when the user moves the high-pressure cleaner, it is not convenient to move it, and it is difficult to find a good place to focus on it.

[0003] For hand-held high-pressure cleaners that can be separated from the water storage device, a crank-link plunger mechanism is usually used. The crank-link plunger mechanism converts the rotary motion of the motor into the linear motion of the plunger, and the crank needs to bear a large force , while the traditional crank-connecting-rod plunger mechanism is divided into cranks supported on one side and integral cranks supported on both sides. The type crank is difficult to process, and the installed shell needs to be disassembled, and the structure is not compact

In addition, the connection position of the connecting rod and the plunger is generally located at the tail of the plunger, which is for the convenience of processing and installation, but it also brings problems. The transmission structure is not compact enough, the lateral force is large, and the plunger is severely rubbed, which affects the efficiency. ;At the same time, the traditional link pin connection method can usually only be designed as a semi-floating type, which leads to serious partial friction of the link pin, which affects life and stability

[0004] For the plunger, traditional household high-pressure cleaners generally use solid plungers, but for handheld household high-pressure cleaners, the weight of the plunger is too large, which will significantly increase the weight of the user's hand; at the same time, when the crank-link transmission mechanism is used to drive the column When plugging, the solid plunger has a large inertia force due to its heavy weight, which will cause obvious vibration of the machine as a whole

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