Electric blower

Abstract

Embodiments of the invention provide an electric blower, including a diffuser having a cover and an impeller sequentially disposed at one side in a shaft direction thereof, a front disposed at the other side in the shaft direction of the diffuser, and an elastic body mounted between the front and the diffuser to support the diffuser.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of and priority under 35 U.S.C. §119 to Korean Patent Application No. KR 10-2014-0061649, entitled “ELECTRIC BLOWER,” filed on May 22, 2014, which is hereby incorporated by reference in its entirety into this application.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to an electric blower.[0004]2. Description of the Related Art[0005]Generally, an electric blower, which is a main body includes a cover and a housing. Further, the electric blower includes, for example, an impeller, a diffuser, and a front, which are installed in an inner space formed by an assembly of the cover and the housing and is disclosed, for example, in U.S. Patent Publication No. 2008 / 0014080.[0006]However, the electric blower according to the conventional art, as described, for example, in U.S. Patent Publication No. 2008 / 0014080 has a structure in which the diffuser and the front are completely fixed ...

AI Technical Summary

Benefits of technology

The invention provides an electric blower that can easily manage the gap between a cover and an impeller by improving the connection between a diffuser and a front. This is accomplished by using an elastic body to enhance the connection between the diffuser and front. The electric blower prevents separation of the impeller from the shaft during rotation by using a hexagonal nut that blocks sliding between the shaft and impeller. The nut is fastened to the end of the shaft in the opposite direction of the impeller rotation, which further increases the tightness of the connection. The same assembling structure can be applied to various configurations of the electric blower and diffuser.

Problems solved by technology

However, the electric blower according to the conventional art, as described, for example, in U.S. Patent Publication No. 2008 / 0014080 has a structure in which the diffuser and the front are completely fixed to each other by screws, and therefore it is difficult to manage a tip clearance between an impeller and a cover at a predetermined level.

In this case, the tip clearance between the impeller and the cover acts as a factor, which greatly affects the performance.

Further, since the impeller is generally mass-produced using a mold, it is very difficult to manage a tolerance between the components and thus it is difficult to constantly manage the interval between the cover and the impeller at a desired level.

In this case of seating the diffuser in the front and then configuring the coupling relationship for completely fixing the diffuser and the front using the screws, when the impeller is seated on the diffuser and then the cover is laid, the end of the diffuser first contacts the cover, and thus the tip clearance between the inside of the cover and the impeller may not be managed.

Further, the assembling of the impeller and the nut more easily assembles the impeller and the shaft than the bonding process.

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