An EC outer rotor axial flow fan

Abstract

The utility model provides a kind of EC outer rotor axial flow fan, belong to fan technical field.It solves the misalignment of the reinstallation of the existing EC fan cover, inconvenient installation, and lack of positioning structure, in the long working condition of fan, cover deflection is prone to abnormal noise problem.This EC outer rotor axial flow fan, including casing and cover, casing and cover are all with flange, corresponding flange is connected by bolt, casing end part is equipped with several interval distribution's positioning slot, cover inner end wall is equipped with multiple positioning part that is inserted into positioning slot and is matched with positioning slot, the inner and outer layers of casing end part are equipped with rubber ring, rubber ring outer end is arc structure, cover inner end is equipped with the card and part that is inserted between two rubber rings.The utility model has the repositioning effect of casing and cover, and reduce cover displacement, prevent abnormal noise.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, and relates to an EC fan, and particularly to an EC external rotor axial flow fan. Background Technology

[0002] Currently, the casing and cover of EC fans on the market are connected by bolts. However, there is a lack of positioning structure between the two. This makes it difficult to reinstall the cover after disassembling it to maintain the internal structure of the casing. Furthermore, the lack of positioning structure can cause the cover to become misaligned and produce abnormal noises when the fan is in operation for a long time. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an EC external rotor axial flow fan to solve these problems.

[0004] The objective of this utility model can be achieved through the following technical solution: An EC external rotor axial flow fan includes a housing and a cover. Both the housing and the cover have flanges, and the corresponding flanges are connected by bolts. The housing is characterized in that a plurality of spaced positioning grooves are provided at the end of the housing, and the inner end wall of the cover has a plurality of positioning parts that extend into the positioning grooves and match the positioning grooves. Both the inner and outer layers of the housing end are provided with rubber rings. The outer end of the rubber rings has an arc-shaped structure, and the inner end of the cover has a locking part that engages between two rubber rings.

[0005] In the aforementioned EC external rotor axial flow fan, the rubber ring is fixed to the casing by adhesive bonding.

[0006] In the aforementioned EC external rotor axial flow fan, the positioning groove has an arc-shaped waist groove structure, and the positioning part has an arc-shaped waist structure.

[0007] Compared with existing technologies, this EC external rotor axial flow fan facilitates the reinstallation and positioning of the casing and cover, reduces cover displacement, and prevents abnormal noise. Attached Figure Description

[0008] Figure 1 This is a 3D view of the EC external rotor axial flow fan.

[0009] Figure 2 This is a partial sectional view of the EC external rotor axial flow fan.

[0010] Figure 3 It's a 3D view of the casing.

[0011] In the diagram, 1 is the housing; 2 is the cover; 3 is the flange; 4 is the bolt; 5 is the positioning groove; 6 is the positioning part; 7 is the rubber ring; and 8 is the locking part. Detailed Implementation

[0012] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0013] like Figure 1-3 As shown, this EC external rotor axial flow fan includes a housing 1 and a cover 2. Both the housing 1 and the cover 2 have flanges 3, which are connected by bolts 4. The end of the housing 1 has several spaced positioning grooves 5. The inner end wall of the cover 2 has multiple positioning parts 6 that extend into and match the positioning grooves 5. Before installation, the positioning parts 6 are aligned with the positioning grooves 5 to achieve initial positioning of the cover 2, and then locked by bolts 4. In order to reduce abnormal noise, the inner and outer layers of the end of the housing 1 are provided with rubber rings 7. The outer end of the rubber ring 7 has an arc-shaped structure, and the inner end of the cover 2 has a locking part 8 that fits between the two rubber rings 7.

[0014] Preferably, the rubber ring 7 is fixed to the housing 1 by adhesive bonding.

[0015] Preferably, the positioning groove 5 has an arc-shaped waist groove structure, and the positioning part 6 has an arc-shaped waist structure.

[0016] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0017] Although this document frequently uses terms such as housing 1, cover 2, flange 3, bolt 4, positioning groove 5, positioning part 6, rubber ring 7, and locking part 8, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. An EC external rotor axial flow fan, comprising a housing (1) and a cover (2), wherein both the housing (1) and the cover (2) have flanges (3), and the corresponding flanges (3) are connected by bolts (4), characterized in that, The end of the housing (1) is provided with a number of spaced positioning grooves (5), and the inner wall of the cover (2) has a number of positioning parts (6) that extend into the positioning grooves (5) and match the positioning grooves (5). The inner and outer layers of the end of the housing (1) are provided with rubber rings (7). The outer end of the rubber ring (7) has an arc-shaped structure, and the inner end of the cover (2) has a locking part (8) that fits between two rubber rings (7).

2. The EC external rotor axial flow fan according to claim 1, characterized in that, The rubber ring (7) is fixed to the housing (1) by adhesive bonding.

3. The EC external rotor axial flow fan according to claim 1, characterized in that, The positioning groove (5) has an arc-shaped waist groove structure, and the positioning part (6) has an arc-shaped waist structure.

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