Mandrel positioning structure for assembling electric fan

Abstract

The utility model discloses a mandrel positioning structure for assembling an electric fan. The mandrel positioning structure comprises a basin-shaped positioning base which is in positioning fit with the periphery of a stator assembly; wherein a center hole is formed in the center of the bottom of the positioning base; a movable ejector pin is inserted in the center hole in a relatively up-down moving manner, and the tip part of the movable ejector pin is used for being matched with a positioning groove in the end part of the core shaft, so that the core shaft is positioned when the electric fan is assembled; the movable ejector pin can flexibly adapt to the assembly requirements of various mandrel diameters, the universality of the tool is improved, the movable ejector pin is easy to use and operate and very suitable for being applied to an assembly line, the production efficiency is greatly improved, and after the movable ejector pin is used for a long time, if the tip part is abraded, the movable ejector pin can not be damaged. Operators can easily find and replace the movable ejector pin quickly and simply, the assembling consistency of the electric fan can be effectively guaranteed, and the assembling efficiency and the assembling quality of the electric fan are improved.

Description

Technical Field

[0001] The utility model belongs to the field of electric fans, and particularly relates to a mandrel positioning structure for the assembly of electric fans. Background Art

[0002] At present, there are many specifications of electric fans applied in the vacuum cleaner industry. Therefore, the mandrel diameters of electric fans also need to correspond to a variety of specification sizes. Currently, during the assembly process of electric fans, the outer diameter of the mandrel is usually inserted into the inner hole of the tooling for positioning. Therefore, it is necessary to design different inner holes of the tooling to cooperate with the assembly according to the outer diameters of mandrels of different sizes, resulting in poor versatility of the assembly tooling during the production process, seriously affecting the production progress. Moreover, after the tooling with outer diameter positioning is used for a long time, the inner hole is severely worn, and it is easy to have an increase in the tooling hole diameter, resulting in an increase in the assembly error of the mandrel of the electric fan, reducing the assembly accuracy of the mandrel, and thus affecting the product consistency.

[0003] Therefore, the applicant hopes to seek a technical solution to solve the above technical problems and ensure that the installation and positioning operation of the mandrel of the electric fan is simple and reliable. Summary of the Invention

[0004] In view of this, the purpose of the utility model is to provide a mandrel positioning structure for the assembly of electric fans, which can flexibly adapt to the assembly requirements of various mandrel diameters, improve the versatility of the tooling, and has simple operation. It is very suitable to be used as the assembly tooling of the assembly line, greatly improving the production efficiency. Moreover, after the movable ejector pin is used for a long time, if the tip part is worn, the operator can easily find it and the movable ejector pin can be quickly and simply replaced, which can effectively ensure the consistency of the electric fan assembly, improve the assembly efficiency and assembly quality of the electric fan.

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

[0006] A mandrel positioning structure for the assembly of an electric fan, the electric fan includes a stator assembly located on the outer periphery and a rotor assembly located on the inner periphery and magnetically connected to the stator assembly, and the rotor assembly is integrally installed with a dynamic impeller through a mandrel; the mandrel positioning structure includes a positioning base that is in positioning cooperation with the outer periphery of the stator assembly and is in a basin shape; wherein, a central hole is provided at the center of the bottom of the positioning base; a movable ejector pin is inserted into the central hole so as to be movable up and down relatively, and the tip part of the movable ejector pin is used for cooperating with the end positioning groove of the mandrel, thereby realizing the positioning of the mandrel during the assembly of the electric fan.

[0007] Preferably, the central hole includes a first central hole unit relatively located below and a second central hole unit relatively located above, wherein the aperture of the second central hole unit is smaller than that of the first central hole unit, and a central hole limiting step is formed at the connection between the second central hole unit and the first central hole unit.

[0008] Preferably, the movable ejector pin includes an ejector pin end portion, an ejector pin middle portion, and a tip portion connected in sequence; wherein, the ejector pin end portion is installed in the first central hole unit in a limited manner so as to be movable up and down relative thereto, and the ejector pin middle portion is installed in the second central hole unit in a limited manner so as to be movable up and down relative thereto.

[0009] Preferably, the tip portion is in a conical shape.

[0010] Preferably, the depth range of the end positioning groove of the mandrel is 1-3 mm.

[0011] Preferably, the width range of the end positioning groove of the mandrel is 1-3 mm.

[0012] Preferably, the aperture range of the first central hole unit is 8-15 mm, and the aperture range of the second central hole unit is 2-6 mm.

[0013] Preferably, the positioning base includes a base bottom provided with the central hole, and a base side wall extending upward around the outer periphery of the base bottom; the stator assembly includes a stator and a blower housing fixedly installed and connected as a whole; wherein, a stator limiting step for limiting and cooperating with the outer periphery of the blower housing is provided on the inner periphery of the base side wall.

[0014] Preferably, the positioning base is made of iron material and obtained through a machining process.

[0015] Preferably, the movable ejector pin is made of iron material and obtained through a machining process.

[0016] The present application proposes a mandrel positioning structure for the assembly of electric fans. A positioning base is used for the stator assembly (specifically, the electric fan housing). At the same time, a central hole structure is provided at the center of the bottom of the positioning base. A movable ejector pin is inserted into the central hole in a relatively vertically movable manner. The tip of the movable ejector pin (usually a tapered tip) is used for positioning cooperation with the end positioning groove of the mandrel, so that the mandrel and the tip are automatically centered, realizing high-precision assembly between the mandrel and the stator assembly, effectively avoiding the defects existing in the positioning of the mandrel outer diameter and the inner hole of the tooling during the assembly of the electric fan. The present application can flexibly adapt to the assembly requirements of various mandrel diameters, improve the versatility of the tooling, and has simple operation. It is very suitable to be used as an assembly tooling for the assembly line, greatly improving the production efficiency. Moreover, when the tip of the movable ejector pin is worn after long-term use, it is easy for the operator to find and the movable ejector pin can be quickly and simply replaced, which can effectively ensure the consistency of the electric fan assembly, improving the assembly efficiency and assembly quality of the electric fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic diagram of the mandrel positioning structure for the assembly of an electric fan under the specific embodiment of the present utility model;

[0018] Figure 2 is Figure 1 exploded structure diagram of;

[0019] Figure 3 FIG. is a schematic diagram of the structure of the movable ejector pin under the specific embodiment of the present utility model;

[0020] Figure 4 is adopted Figure 1 schematic diagram of the structure of the electric fan assembly using the mandrel positioning structure shown in FIG. SPECIFIC EMBODIMENTS

[0021] An embodiment of the present utility model discloses a mandrel positioning structure for the assembly of an electric fan. The electric fan includes a stator assembly located on the outer periphery and a rotor assembly located on the inner periphery and magnetically connected to the stator assembly. The rotor assembly is integrally installed with a moving impeller through a mandrel; the mandrel positioning structure includes a positioning base that is in positioning cooperation with the outer periphery of the stator assembly and is in a basin shape; wherein, a central hole is provided at the center of the bottom of the positioning base; a movable ejector pin is inserted into the central hole in a relatively vertically movable manner, and the tip of the movable ejector pin is used for cooperation with the end positioning groove of the mandrel, thereby realizing the positioning of the mandrel during the assembly of the electric fan.

[0022] 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 in 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.

[0023] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a mandrel positioning structure for the assembly of an electric fan. The electric fan includes a stator assembly 20 located on the outer periphery and a rotor assembly 30 located on the inner periphery and magnetically connected to the stator assembly 20. The rotor assembly is integrally installed with a dynamic impeller (a well-known structure, not shown in the figure) through a mandrel 40; the mandrel positioning structure includes a positioning base 10 that is in positioning cooperation with the outer periphery of the stator assembly 20 and is in a basin shape; preferably, in this embodiment, the positioning base 10 includes a base bottom 10a provided with a central hole 11, and a base side wall 10b extends upward around the outer periphery of the base bottom 10a; the stator assembly 20 includes a stator 21 and an electric fan housing 22 that are fixedly installed and connected as a whole; wherein, an inner periphery of the base side wall 10b is provided with a stator limiting step 12 that is in limiting cooperation with the outer periphery of the electric fan housing 22.

[0024] In this embodiment, a central hole 11 is provided at the center of the bottom of the positioning base 10; a movable ejector pin 12 is inserted into the central hole 11 so as to be movable up and down relatively. The tip 12a of the movable ejector pin 12 is used for positioning cooperation with the end positioning groove 41 of the mandrel 40, thereby realizing the positioning of the mandrel 40 during the assembly of the electric fan; when the tip 12a of the movable ejector pin 12 wears after long-term use, the operator can easily find it and the movable ejector pin 12 can be replaced quickly and simply, which can effectively ensure the consistency of the electric fan assembly and improve the assembly efficiency and assembly quality of the electric fan; preferably, in this embodiment, the depth range of the end positioning groove 41 of the mandrel 40 is 1-3 mm, and the width range is 1-3 mm.

[0025] Preferably, in this embodiment, the central hole 11 includes a first central hole unit 11a located relatively below and a second central hole unit 11b located relatively above. Among them, the aperture of the second central hole unit 11b is smaller than that of the first central hole unit 11a, and a central hole limiting step 11c is formed at the connection between the second central hole unit 11b and the first central hole unit 11a; preferably, in this embodiment, the aperture range of the first central hole unit 11a is 8-15 mm, and the aperture range of the second central hole unit 11b is 2-6 mm.

[0026] Preferably, in the present embodiment, the movable ejector pin 12 includes an ejector pin end portion 12b, an ejector pin middle portion 12c, and a tip portion 12a connected in sequence; wherein, the ejector pin end portion 12b is installed in the first central hole unit 11a in a vertically movable and limited manner, and the ejector pin middle portion 12c is installed in the second central hole unit 11b in a vertically movable and limited manner; further preferably, in the present embodiment, the tip portion 12a is in a conical shape.

[0027] Preferably, in the present embodiment, the positioning base 10 is made of iron material and obtained through machining processes; the movable ejector pin 12 is made of iron material and obtained through machining processes.

[0028] This embodiment provides a mandrel positioning structure for the assembly of an electric fan. The positioning base 10 is used for the electric fan housing 22 of the stator assembly. At the same time, a central hole 11 structure is provided at the center position of the bottom of the positioning base 10. The movable ejector pin 12 is inserted into the central hole 11 in a vertically movable manner. The tip portion 12a (in a conical tip shape) of the movable ejector pin 12 is used for positioning and mating with the end positioning groove 41 of the mandrel 40, enabling the mandrel and the tip portion to automatically align, achieving high-precision assembly between the mandrel and the stator assembly, and effectively avoiding the defects existing in the positioning of the mandrel outer diameter and the inner hole of the tooling during the assembly of the electric fan. During the specific assembly process, first, the positioning of the electric fan housing 22 and the mandrel 40 is achieved through the mandrel positioning structure provided in this embodiment, and then the relevant structures of the electric fan are sequentially installed until the assembly is completed. After that, the assembled electric fan is removed from the mandrel positioning structure.

[0029] This embodiment can flexibly adapt to the assembly requirements of various mandrel diameters, improve the versatility of the tooling, and has simple operation. It is very suitable to be used as an assembly tooling for the assembly line, greatly improving the production efficiency.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, 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 included in 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 in terms of embodiments, not every embodiment only includes an independent technical solution. This narrative style 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. A mandrel positioning structure for the assembly of an electric fan, the electric fan comprising a stator assembly located on the outer periphery and a rotor assembly located on the inner periphery and magnetically connected to the stator assembly, the rotor assembly being integrally mounted with a moving impeller through a mandrel; characterized in that, The mandrel positioning structure includes a positioning base that is peripherally positioned and cooperates with the stator assembly and is in a basin shape; wherein, a central hole is provided at the center of the bottom of the positioning base; a movable ejector pin is inserted into the central hole in a relatively vertically movable manner, and the tip of the movable ejector pin is used to cooperate with the end positioning groove of the mandrel, thereby realizing the positioning of the mandrel during the assembly of the electric fan.

2. The mandrel positioning structure for the assembly of an electric fan according to claim 1, characterized in that, The central hole includes a first central hole unit relatively located below and a second central hole unit relatively located above, wherein the aperture of the second central hole unit is smaller than that of the first central hole unit, and a central hole limiting step is formed at the connection between the second central hole unit and the first central hole unit.

3. The mandrel positioning structure for the assembly of an electric fan according to claim 2, wherein, The movable ejector pin includes an ejector pin end, an ejector pin middle part, and a tip part connected in sequence; wherein, the ejector pin end is installed in the first central hole unit in a relatively vertically movable and limited manner, and the ejector pin middle part is installed in the second central hole unit in a relatively vertically movable and limited manner.

4. The mandrel positioning structure for the assembly of an electric fan according to claim 1 or 3, characterized in that, The tip part is in a conical shape.

5. The mandrel positioning structure for the assembly of an electric fan according to claim 1, wherein, The depth range of the end positioning groove of the mandrel is 1-3 mm.

6. The mandrel positioning structure for the assembly of an electric fan according to claim 1 or 5, characterized in that, The width range of the end positioning groove of the mandrel is 1-3 mm.

7. The mandrel positioning structure for the assembly of an electric fan according to claim 3, characterized in that, The aperture range of the first central hole unit is 8-15 mm, and the aperture range of the second central hole unit is 2-6 mm.

8. The mandrel positioning structure for the assembly of an electric fan according to claim 1, characterized in that, The positioning base includes a base bottom provided with the central hole, and a base side wall extending upward around the outer periphery of the base bottom; the stator assembly includes a stator and an electric fan housing fixedly installed and connected as a whole; wherein, a stator limiting step for limiting and cooperating with the outer periphery of the electric fan housing is provided on the inner periphery of the base side wall.

9. The mandrel positioning structure for the assembly of an electric fan according to claim 1, characterized in that, The positioning base is made of iron material and obtained through a machining process.

10. The mandrel positioning structure for the assembly of an electric fan according to claim 1, characterized in that, The movable ejector pin is made of iron material and obtained through a machining process.

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