Electric fan beneficial to efficient assembly

Abstract

The utility model discloses an electric fan beneficial to efficient assembly, which comprises a stator component positioned on the outer circumference and a rotor component positioned on the inner circumference, and the rotor component is rotatably and coaxially mounted with an upper bearing and a lower bearing respectively through a mandrel; the central spindle is provided with a central groove hole, the central groove hole and the periphery of the motor shell are coaxially arranged, and the central groove hole is used for centering guiding when the stator assembly and the rotor assembly are assembled. According to the utility model, the two ends of the mandrel of the rotor assembly are respectively provided with the central groove holes, and the tool is used for positioning and guiding, so that coaxial assembly of the stator assembly and the rotor assembly is effectively realized, high-precision assembly of the electric fan can be efficiently realized, and the tool is simple to use and operate, is very suitable for being applied to assembly of an assembly line, and has high practicability. The production efficiency is greatly improved, the assembling consistency of the electric fan can be effectively guaranteed, and the assembling efficiency and the product yield of the electric fan are improved.

Description

Technical Field

[0001] The utility model belongs to the field of electric fans, and particularly relates to an electric fan which is beneficial to efficient assembly. Background Art

[0002] At present, the electric fans applied in the vacuum cleaner industry are usually mass-produced by an assembly line. For the production and assembly of each component, it is necessary to be fast, efficient, and ensure quality and quantity. Since the assembly of the mandrel of the rotor assembly and the stator assembly of the current electric fan depends on the machining accuracy of each component to ensure the product quality of the motor assembly, due to the deviation of the machining accuracy of the components and the inability to ensure consistent dimensions, there are often large differences in the performance of the motors during the assembly production process of the electric fan, resulting in difficulty in improving the yield rate of the electric fan, and seriously affecting the performance of the product and the consistency of the product quality.

[0003] Therefore, the applicant hopes to seek a technical solution to solve the above technical problems and ensure the efficient assembly of the electric fan. Summary of the Invention

[0004] In view of this, the purpose of the utility model is to provide an electric fan which is beneficial to efficient assembly. By respectively arranging central groove holes at both ends of the mandrel of the rotor assembly and carrying out positioning and guiding through a tooling, the coaxial assembly of the stator assembly and the rotor assembly can be effectively realized, the high-precision assembly of the electric fan can be efficiently achieved, and the use and operation are simple. It is very suitable to be used as the assembly of an assembly line, greatly improving the production efficiency, effectively ensuring the consistency of the electric fan assembly, and improving the assembly efficiency of the electric fan and the yield rate of the product.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An electric fan which is beneficial to efficient assembly, the electric fan includes a stator assembly located on the outer periphery and a rotor assembly located on the inner periphery. Among them, the stator assembly includes a stator core, a stator coil, a rear end cover, an upper bearing and a lower bearing which are integrally installed and connected on the inner periphery of the motor housing. The rotor assembly is rotatably and coaxially installed with the upper bearing and the lower bearing respectively through a mandrel; the mandrel is provided with a central groove hole, and the central groove hole is coaxially arranged with the outer periphery of the motor housing, and the central groove hole is used for centering and guiding during the assembly of the stator assembly and the rotor assembly.

[0007] Preferably, the central groove hole includes a first central groove hole and a second central groove hole. Among them, the first central groove hole and the second central groove hole are respectively arranged at both ends of the mandrel.

[0008] Preferably, both the first central groove hole and the second central groove hole are straight holes and the bottom of the hole is conical.

[0009] Preferably, the hole diameter of the first central groove hole is larger than that of the second central groove hole, and the depth of the first central groove hole is smaller than that of the second central groove hole.

[0010] Preferably, the hole diameter range of the first central groove hole is 1.3 - 3 mm, and the depth range is 0.8 - 2 mm.

[0011] Preferably, the hole diameter range of the second central groove hole is 0.8 - 2 mm, and the depth range is 1.3 - 3 mm.

[0012] Preferably, the outer surfaces at both ends of the mandrel are provided with tapered chamfers. The length range of the tapered chamfers is 0.3 - 1 mm, and the angle is 5 - 10°.

[0013] Preferably, the upper bearing is fixedly installed in the hole of the rear end cover, the lower bearing is fixedly installed in the lower concave hole of the motor housing, and the upper bearing, the lower bearing and the mandrel are coaxially assembled.

[0014] Preferably, the inner circumferential surface at the upper end of the motor housing and the outer circumferential surface of the rear end cover are coaxially positioned and assembled.

[0015] Preferably, the outer circumference of the motor housing is positioned and assembled in the tooling. The stator core wound with the stator coil and the lower bearing are loaded. The rotor assembly is pressed into the tooling through the guiding of the central groove hole, and then the upper bearing and the rear end cover are assembled in sequence.

[0016] The present application proposes a structure of an electric fan conducive to efficient assembly. Specifically, central groove holes are respectively arranged at both ends of the mandrel of the rotor assembly. During the assembly process of the electric fan, the outer circumference of the motor housing of the electric fan is positioned by the tooling. The central part of the tooling is provided with an elastically telescopic center point, and the center point is positioned and guided with the central groove hole (opposing each other in the up and down directions), effectively realizing the coaxial assembly of the stator assembly and the rotor assembly, and can efficiently achieve the high-precision assembly of the electric fan. Moreover, the use and operation are simple, and it is very suitable to be applied as the assembly on the assembly line, greatly improving the production efficiency, effectively ensuring the consistency of the electric fan assembly, and improving the assembly efficiency of the electric fan and the yield rate of the product.

[0017] The present application further preferably proposes that tapered chamfers are provided on the outer surfaces at both ends of the mandrel, which can further improve the reliability of positioning and guiding. It is proposed that the inner circumferential surface at the upper end of the motor housing and the outer circumferential surface of the rear end cover are coaxially positioned and assembled, which can further improve the coaxial assembly accuracy of the stator assembly and the rotor assembly. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the structure of an electric fan conducive to efficient assembly under the specific embodiment of the present invention;

[0019] Figure 2 is Figure 1 the top view of;

[0020] Figure 3 is Figure 1 the sectional view of;

[0021] Figure 4 is Figure 1 the exploded structure schematic diagram of. Specific embodiments

[0022] An embodiment of the present utility model discloses an electric fan facilitating efficient assembly. The electric fan includes a stator assembly located on the outer periphery and a rotor assembly located on the inner periphery. Among them, the stator assembly includes a stator core, a stator coil, a rear end cover, an upper bearing, and a lower bearing that are integrally installed and connected on the inner periphery of the motor housing. The rotor assembly is rotatably and coaxially installed with the upper bearing and the lower bearing through a core shaft respectively; the core shaft is provided with a central groove hole, and the central groove hole is coaxially arranged with the outer periphery of the motor housing. The central groove hole is used for centering and guiding during the assembly of the stator assembly and the rotor assembly.

[0023] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to and see in conjunction with Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, an electric fan conducive to efficient assembly includes a stator assembly 10 located on the outer periphery and a rotor assembly 20 located on the inner periphery. Among them, the stator assembly 10 includes a stator core 12, a stator coil 13, a rear end cover 14, an upper bearing 15a, and a lower bearing 15b that are integrally installed and connected on the inner periphery of the motor housing 11. The rotor assembly 20 is rotatably and coaxially installed with the upper bearing 15a and the lower bearing 15b respectively through a core shaft 21. The core shaft 21 is provided with a central groove hole, and the central groove hole is coaxially arranged with the outer periphery of the motor housing 11. The central groove hole is used for centering and guiding during the assembly of the stator assembly 10 and the rotor assembly 20. Preferably, in this embodiment, the central groove hole includes a first central groove hole 22 and a second central groove hole 23. Among them, the first central groove hole 22 and the second central groove hole 23 are respectively arranged at both ends of the core shaft 21 (during assembly guidance, a tooling can specifically use a thimble, and through two thimbles respectively performing quick guidance and positioning in the up and down directions with the second central groove hole 23 and the first central groove hole 22, a quick and high-precision opposite coaxial positioning effect can be achieved). Preferably, in this embodiment, the upper bearing 15a is fixedly installed in the hole 14a of the rear end cover 14, the lower bearing 15b is fixedly installed in the lower concave hole 11a of the motor housing 11, and the upper bearing 15a, the lower bearing 15b and the core shaft 21 are coaxially assembled. Preferably, in this embodiment, the inner circumferential surface at the upper end of the motor housing 11 and the outer circumferential surface of the rear end cover 14 are coaxially positioned and assembled.

[0025] Further preferably, in order to achieve a quick and accurate guiding and assembling effect, in this embodiment, both the first central groove hole 22 and the second central groove hole 23 are straight holes and the bottoms of the holes are conical.

[0026] Preferably, in order to facilitate error prevention during guiding assembly and provide a more stable and reliable opposite positioning effect in the axial direction of the motor assembly, in this embodiment, the hole diameter of the first central groove hole 22 is larger than the hole diameter of the second central groove hole 23, and the depth of the first central groove hole 22 is less than the depth of the second central groove hole 23. Among them, the first central groove hole 22 is located below and the second central groove hole 23 is located above. Further preferably, in this embodiment, the hole diameter range of the first central groove hole 22 is 1.3 - 3 mm, and the depth range is 0.8 - 2 mm; the hole diameter range of the second central groove hole 23 is 0.8 - 2 mm, and the depth range is 1.3 - 3 mm.

[0027] Preferably, in order to facilitate quick guiding assembly with the upper bearing 15a and the lower bearing 15b, in this embodiment, tapered chamfers 21a are provided on the outer surfaces at both ends of the core shaft 21, and the length range of the tapered chamfers 21a is 0.3 - 1 mm, and the angle is 5 - 10°.

[0028] Preferably, during actual assembly of this embodiment, the outer periphery of the motor housing 11 is positioned and assembled within the tooling. The stator core 12 wound with the stator coil 13 and the lower bearing 15b are loaded. The rotor assembly 20 is press-fitted by using a thimble to oppose and guide against the first central groove hole 22 and the second central groove hole 23 respectively. Then, the upper bearing 15a and the rear end cover 14 are assembled in sequence until the assembly of the electric fan is completed. Among them, the impeller structure of the electric fan can be assembled separately after the above-mentioned main body structure of the electric fan is assembled. This assembly sequence does not belong to the innovative content of this application and is not particularly limited herein.

[0029] This embodiment proposes an electric fan structure that is conducive to efficient assembly. Specifically, central groove holes are respectively provided at both ends of the core shaft 21 of the rotor assembly. During the assembly process of the electric fan, the outer circle of the motor housing 11 of the electric fan is positioned by the tooling. The central part of the tooling is provided with an elastically telescopic center point. The center point is positioned and guided with the central groove hole, effectively realizing the coaxial assembly of the stator assembly and the rotor assembly, and can efficiently achieve the high-precision assembly of the electric fan. Moreover, the use and operation are simple, and it is very suitable to be applied as the assembly of the production line, greatly improving the production efficiency, effectively ensuring the consistency of the electric fan assembly, and improving the assembly efficiency of the electric fan and the yield rate of the product.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0031] In addition, it should be understood that although this specification is described according to the embodiments, not each embodiment only includes an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric fan facilitating efficient assembly, the electric fan includes a stator assembly located on the outer periphery and a rotor assembly located on the inner periphery, wherein, The stator assembly includes a stator core, a stator coil, a rear end cover, an upper bearing and a lower bearing which are integrally installed and connected and located on the inner circumference of the motor housing. The rotor assembly is rotatably and coaxially installed with the upper bearing and the lower bearing respectively through a core shaft. It is characterized in that the core shaft is provided with a central groove hole which is coaxially arranged with the outer circumference of the motor housing, and the central groove hole is used for centering and guiding during the assembly of the stator assembly and the rotor assembly.

2. The electric fan conducive to efficient assembly according to claim 1, characterized in that The central groove hole includes a first central groove hole and a second central groove hole. Among them, the first central groove hole and the second central groove hole are respectively arranged at both ends of the core shaft.

3. The electric fan conducive to efficient assembly according to claim 2, characterized in that, Both the first central groove hole and the second central groove hole are straight holes and the bottoms of the holes are conical.

4. The electric fan conducive to efficient assembly according to claim 2, wherein The hole diameter of the first central groove hole is larger than that of the second central groove hole, and the depth of the first central groove hole is smaller than that of the second central groove hole.

5. The electric fan facilitating efficient assembly according to claim 2 or 3 or 4, characterized in that The hole diameter range of the first central groove hole is 1.3 - 3 mm, and the depth range is 0.8 - 2 mm.

6. The electric fan facilitating efficient assembly according to claim 2 or 3 or 4, wherein The hole diameter range of the second central groove hole is 0.8 - 2 mm, and the depth range is 1.3 - 3 mm.

7. The electric fan according to claim 1, which is conducive to efficient assembly, is characterized in that, Conical chamfers are provided on the outer surfaces at both ends of the core shaft. The length range of the conical chamfers is 0.3 - 1 mm, and the angle is 5 - 10°.

8. The electric fan conducive to efficient assembly according to claim 1, wherein The upper bearing is fixedly installed in the hole of the rear end cover, and the lower bearing is fixedly installed in the lower concave hole of the motor housing. Moreover, the upper bearing, the lower bearing and the core shaft are assembled coaxially.

9. The electric fan according to claim 1, which is conducive to efficient assembly, is characterized in that, The inner circumferential surface at the upper end of the motor housing and the outer circumferential surface of the rear end cover are assembled with coaxial positioning.

10. The electric fan according to claim 1, which is conducive to efficient assembly, is characterized in that, The outer circumference of the motor housing is assembled and positioned in a tooling. The stator core wound with a stator coil and the lower bearing are loaded. The rotor assembly is pressed in through the guiding of the central groove hole by the tooling, and then the upper bearing and the rear end cover are assembled in sequence.

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