Fine positioning assembly structure of fan

Abstract

The utility model relates to the technical field of fans, and discloses a fan fine positioning assembly structure which comprises a machine shell, and a base is arranged at the bottom of the machine shell. The rotor is rotationally arranged between the machine shell and the base, and the rotor is clamped and positioned through the machine shell and the base. A fixed impeller support is arranged in the machine shell, an upper bearing seat is arranged in the center of the fixed impeller support, and a lower bearing seat is arranged in the center of the base. And an upper bearing and a lower bearing are respectively arranged at the upper end and the lower end of the rotor and are respectively arranged in an upper bearing seat and a lower bearing seat. The rotor is positioned through the casing and the base, the positioning of the rotor is irrelevant to the stator iron core, the positioning precision of the rotor is high, the upper end and the lower end of the rotor are communicated, the rotor cannot shake when the rotating speed is high, and noise is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially a fan precision positioning assembly structure applied in dust collection equipment. BACKGROUND

[0002] Dust collection equipment is internally provided with a fan for generating negative pressure to form suction force, and the fan works by rotating a dynamic impeller driven by a brushless motor.

[0003] In the existing fan structure, the rotor of the brushless motor is positioned by three components, i.e., an upper support, an intermediate stator core and a lower casing. Since the stator core is formed by stacking and riveting multiple chips, the height around the core is deviated and twisted, resulting in unevenness, which causes the upper and lower ends of the rotor to be different in axis during positioning, and easily causes the rotor to be skewed. When the speed is high, the rotor will shake and noise will occur. SUMMARY

[0004] Therefore, it is necessary to provide a fan precision positioning assembly structure to solve the problem of low positioning accuracy of the rotor of the existing fan.

[0005] To achieve the above object, the utility model provides the following technical scheme: a fan precision positioning assembly structure, comprising a casing, wherein the bottom of the casing is provided with a base.

[0006] A rotor is rotatably installed between the casing and the base, and the rotor is clamped and positioned by the casing and the base.

[0007] In a preferred example, the utility model can be further configured as follows: a stator impeller support is arranged in the casing, an upper bearing seat is arranged at the center of the stator impeller support, and a lower bearing seat is arranged at the center of the base.

[0008] Upper and lower bearings are arranged at the upper and lower ends of the rotor, respectively, and the upper and lower bearings are installed in the upper bearing seat and the lower bearing seat, respectively.

[0009] By adopting the above technical scheme, the positioning and installation of the rotor are realized.

[0010] In a preferred example, the utility model can be further configured as follows: the casing and the base are fixed by three-point positioning and can be detachably fixed by screws.

[0011] By adopting the above technical scheme, triangular positioning is adopted, and the stability is better.

[0012] In a preferred example, the utility model can be further configured as follows: three upwardly extending upper bosses are arranged at the bottom of the casing, three groups of the upper bosses are annularly and equidistantly distributed at the edge of the bottom of the casing, three groups of lower bosses corresponding to the positions of the upper bosses are arranged around the base, and the upper bosses and the lower bosses are detachably fixed by screws.

[0013] By adopting the technical scheme, the rotor is positioned by two components, installation is facilitated, and installation precision is high.

[0014] The utility model discloses in a preferable example can be further configured as: the upper boss bottom is equipped with the positioning hole, the lower boss upper end is equipped with the positioning column of inserting and adapting with the positioning hole, the screw is connected with the screw hole top equipped with the positioning hole after passing the positioning column from the lower boss bottom.

[0015] By adopting the technical scheme, positioning and installation are facilitated.

[0016] In conclusion, the utility model has at least one of the following beneficial technical effects:

[0017] The rotor is positioned by the casing and the base, the positioning of the rotor is irrelevant to the stator core, the positioning precision of the rotor is high, the upper and lower ends of the rotor are coaxial, the rotor does not shake when rotating at high speed, and noise generation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings are used to provide further understanding of the utility model, and constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation to the utility model, and in the drawings:

[0019] Figure 1 It is the structural schematic diagram of the utility model;

[0020] Figure 2 It is the explosion drawing of the utility model;

[0021] Figure 3 It is the structural schematic diagram of the base in the utility model;

[0022] Figure 4 It is the structural schematic diagram of the casing in the utility model.

[0023] In the drawings:

[0024] 1, casing;11, fixed vane support;12, upper bearing seat;13, upper boss;14, positioning hole;2, base;21, lower bearing seat;22, positioning column;23, lower boss;3, rotor;31, upper bearing;32, lower bearing. DETAILED DESCRIPTION

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] exist Figures 1-4 In the embodiments shown, the present invention provides a technical solution: a fan precision positioning assembly structure, including a housing 1, a base 2 at the bottom of the housing 1, a fixed impeller bracket 11 inside the housing 1, an air duct on the fixed impeller bracket 11, and a fixed impeller (not shown in the figure) fixedly installed on the bracket.

[0027] In practical applications, compared to existing fan rotors, rotor 3 is rotatably mounted between housing 1 and base 2, and rotor 3 is clamped and positioned by housing 1 and base 2.

[0028] In this embodiment, the fixed impeller support 11 is provided with an upper bearing seat 12 at its center, and the base 2 is provided with a lower bearing seat 21 at its center; the rotor 3 is provided with an upper bearing 31 and a lower bearing 32 at its upper and lower ends, respectively. The upper bearing 31 and the lower bearing 32 are respectively installed in the upper bearing seat 12 and the lower bearing seat 21. The upper end of the rotor 3 passes through the upper bearing seat 12 and the fixed impeller and is connected to the moving impeller (not shown in the figure).

[0029] The bottom of the housing 1 is provided with three downward-extending upper protrusions 13. The three sets of upper protrusions 13 are equidistantly distributed in a ring around the bottom edge of the housing 1. The base 2 is provided with three sets of lower protrusions 23 corresponding to the positions of the upper protrusions 13.

[0030] The upper boss 13 has a positioning hole 14 at its bottom, and the lower boss 23 has a positioning post 22 at its upper end that is compatible with the positioning hole 14. The screw passes through the positioning post 22 from the bottom of the lower boss 23 and rotates to connect with the screw hole at the top of the positioning hole 14, so that the housing 1 and the base 2 can position the rotor 3.

[0031] The specific working principle of this utility model will be explained in detail below: The stator core is installed inside the housing 1, and the stator core is placed at the lower end of the stator impeller support 11. The upper bearing 31 of the rotor 3 is installed inside the upper bearing seat 12. The positioning pin 22 of the base 2 is inserted into the positioning hole 14. The lower bearing 32 is fixedly installed inside the lower bearing seat 21. The positioning pin 22 and the positioning hole 14 are fixed by screws. Since the rotor 3 is positioned by the housing 1 and the base 2, it is not affected by the stator core, and the positioning accuracy is high.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fan precision positioning assembly structure, comprising a housing (1), wherein a base (2) is provided at the bottom of the housing (1), characterized in that: Rotor (3), which is rotatably mounted between housing (1) and base (2), and is positioned by the housing (1) and base (2); The housing (1) and the base (2) are fixed together by three-point positioning and can be detached and fixed by screws; The bottom of the housing (1) is provided with three downward extending upper protrusions (13). The three sets of upper protrusions (13) are distributed equidistantly in a ring at the bottom edge of the housing (1). The base (2) is provided with three sets of lower protrusions (23) corresponding to the positions of the upper protrusions (13). The upper protrusions (13) and the lower protrusions (23) are detachably fixed by screws. The upper boss (13) has a positioning hole (14) at its bottom. The lower boss (23) has a positioning post (22) at its upper end that is compatible with the positioning hole (14). The screw passes through the positioning post (22) from the bottom of the lower boss (23) and is rotatably connected to the screw hole at the top of the positioning hole (14).

2. The fan precision positioning assembly structure according to claim 1, characterized in that: The housing (1) is provided with a fixed impeller support (11), the fixed impeller support (11) is provided with an upper bearing seat (12) at the center, and the base (2) is provided with a lower bearing seat (21) at the center. The rotor (3) is provided with an upper bearing (31) and a lower bearing (32) at its upper and lower ends, respectively. The upper bearing (31) and the lower bearing (32) are respectively installed in the upper bearing seat (12) and the lower bearing seat (21).

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