KR-102964021-B1 - MOTOR ASSEMBLY AND A CLEANER COMPRISING THE SAME

Abstract

A motor assembly is disclosed. The motor assembly comprises a motor having a rotating shaft, an impeller having a plurality of blades connected to the rotating shaft, and an impeller cover covering the side of the impeller and spaced apart from the impeller by a predetermined distance, wherein at least one of the plurality of blades includes a projection disposed between the impeller cover and the blade.

Inventors

• 박태상
• 강민석
• 고동석

Assignees

• 삼성전자주식회사

Dates

Publication Date

20260513

Application Date

20200427

Claims (20)

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18. In a method for manufacturing a motor assembly, A step of forming at least one protrusion on the impeller; A step of manufacturing a subassembly comprising a stator, a rotor, a motor housing that accommodates the stator and the rotor, and an impeller fixed to one end of the rotor and disposed outside the motor housing; A step of positioning the sub-assembly on the impeller cover such that at least one projection contacts the impeller cover, thereby securing a gap between the impeller and the impeller cover; The step of coupling the above impeller cover to the motor housing; and A method for manufacturing a motor assembly comprising the step of rotating the impeller so that at least one projection is worn by the impeller cover.
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20. In Paragraph 18, The step of rotating the above impeller is, A method for manufacturing a motor assembly, wherein the above impeller is rotated at a speed higher than the rated rotational speed of the motor assembly.

Description

Motor assembly and a cleaner comprising the same The present disclosure relates to a motor assembly having an improved structure to improve suction performance and a vacuum cleaner including the same, and more specifically, to a motor assembly having an improved structure to maintain a minimum gap between an impeller and an impeller cover and a vacuum cleaner including the same. Generally, a vacuum cleaner is a device that sucks in air from a surface to be cleaned, separates and collects dust or contaminants from the sucked-in air, and discharges the purified air outside the main body. These vacuum cleaners can be classified according to their shape into canister type vacuum cleaners, upright type vacuum cleaners, handheld vacuum cleaners, stick type vacuum cleaners, etc. The vacuum cleaner may include a motor driven to generate suction force. The motor is a machine that obtains rotational force from electrical energy and includes a stator and a rotor, and may include an impeller that rotates together with the rotor to generate suction force and an impeller cover positioned to surround the impeller. A predetermined gap is provided between the impeller and the impeller cover, and the motor's suction performance is maximized when this gap is minimized. However, if the gap between the impeller and the impeller cover becomes smaller, excessive contact occurs between them, leading to a problem where the impeller's rotation is hindered by frictional resistance. FIG. 1 is a perspective view of a stick-type vacuum cleaner including a motor assembly according to one embodiment of the present disclosure. FIG. 2 is a perspective view of a motor assembly according to one embodiment of the present disclosure. FIG. 3 is an exploded perspective view of a motor assembly according to one embodiment of the present disclosure. FIG. 4 is a perspective view of an impeller according to one embodiment of the present disclosure. Figure 5 is a plan view showing the impeller of Figure 4. FIG. 6 is a plan view of an impeller according to another embodiment of the present disclosure. FIG. 7 is a cross-sectional view of a motor assembly according to one embodiment of the present disclosure. Figure 8 is a cross-sectional view showing an enlarged view of area A of Figure 5. FIG. 9 is a bottom view of an impeller cover according to another embodiment of the present disclosure. FIG. 10 is a bottom view of an impeller cover according to another embodiment of the present disclosure. FIG. 11 is a cross-sectional view of a motor assembly according to another embodiment of the present disclosure. Figure 12 is a cross-sectional view showing an enlarged view of area B of Figure 8. FIG. 13 is a flowchart illustrating a method for manufacturing a motor assembly according to one embodiment of the present disclosure. FIG. 14 is a drawing for explaining a method of manufacturing a motor assembly according to one embodiment of the present disclosure, showing the state before the impeller cover and the motor housing are combined. FIG. 15 is a drawing for explaining a method of manufacturing a motor assembly according to one embodiment of the present disclosure, showing the state after the impeller cover and the motor housing are combined. FIG. 16 is a drawing for explaining a method of manufacturing a motor assembly according to another embodiment of the present disclosure, showing the state before the impeller cover and the motor housing are combined. FIG. 17 is a drawing for explaining a method of manufacturing a motor assembly according to another embodiment of the present disclosure, showing the state after the impeller cover and the motor housing are combined. The embodiments described below are provided as examples to aid in understanding the present disclosure, and it should be understood that the present disclosure may be implemented in various modified forms different from the embodiments described herein. However, in describing the present disclosure below, detailed descriptions and specific illustrations of related known functions or components are omitted if it is determined that such detailed descriptions or specific illustrations would unnecessarily obscure the essence of the present disclosure. Additionally, the attached drawings are not drawn to actual scale to aid in understanding the disclosure, and the dimensions of some components may be exaggerated. The terms used in this specification and claims have been selected based on general terms in consideration of the function of this disclosure. However, these terms may vary depending on the intent of those skilled in the art, legal or technical interpretations, or the emergence of new technologies. Additionally, some terms have been selected at the applicant's discretion. Such terms may be interpreted according to the meanings defined in this specification; in the absence of specific definitions, they may be interpreted based on the overall content of this specification and the ordinary