Electric power tool

Abstract

An electric power tool comprises a casing, a power component, a transmission mechanism, an actuating mechanism and a dust blowing and sucking component, wherein the power component comprises an electric motor arranged in the casing; a power output shaft of the electric motor is connected with the power input shaft of the transmission mechanism; the power output end of the transmission mechanism is connected with the actuating mechanism; the dust blowing and sucking component comprises a cavity as well as a power supply, a control component and a dust collection piece, which are arranged in the cavity; the cavity is arranged in the casing and is sealed relative to the interior of the casing, a ventilation chamber is formed in the cavity, a first ventilation opening and a second ventilation opening, which are communicated with the ventilation chamber, are formed at two ends of the cavity respectively, the first ventilation opening is positioned on the casing and at the position near the actuating mechanism, and the second ventilation opening is sleeved with the dust collection piece; the control component can control the fan to rotate in a first direction or in an opposite second direction; and the power supply is used for providing power to the fan.

Description

technical field [0001] The invention relates to a power tool, in particular to an electric tool with the function of blowing dust. Background technique [0002] At present, there is no self-cleaning function on the general power tools. When the operator uses these power tools to work, especially when processing workpieces such as wood, a large amount of dust will be generated during the processing, so he has to wear a mask. Dust is also harmful to the environment. In order to reduce the hazards of dust in the processing process, some electric tools need to be connected to external special vacuum equipment, and the special vacuum equipment is connected to the adapter that comes with the power tool to achieve the dust collection effect. However, the special vacuum equipment is expensive and relatively small. It is large, and the noise is louder when working, and an adapter capable of connecting the electric tool with a special vacuuming device needs to be provided, which lead...

AI Technical Summary

Problems solved by technology

In order to reduce the hazards of dust in the processing process, some electric tools need to be connected to external special vacuum equipment, and the special vacuum equipment is connected to the adapter that comes with the power tool to achieve the dust collection effect. However, the special vacuum equipment is expensive and relatively small. It is large and noisy when working, and it is also necessary to set up an adapter that can connect the electric tool with a special vacuuming device, which leads to a higher cost of the electric tool

[0003] Existing electric tools generally use a fan installed on the motor shaft to cool the motor to achieve dust blowing. Since the electric tool cannot stop the fan when it is started, the airflow of the motor fan will seriously affect the The efficiency of dust collection cannot be completely blocked even if the blower switch is designed to block the airflow of the motor fan, and the blower switch also increases the complexity and production cost of the electric tool at the same time

[0004] Also, since the fan cannot be stopped when the power tool is turned on, the hot air will blow to the operator, or raise dust and wood chips, making the operating environment worse and affecting visibility

[0005] In addition, in the existing technical solutions, the dust blowing can only be realized after the electric tool is started, and the fan is always working when the machine is working, which will lead to energy loss, and the interaction between the airflow and the casing will also generate noise

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