Centrifugal fan

Abstract

The utility model discloses a centrifugal fan which comprises a volute and a motor casing. The volute comprises an upper shell and a lower shell, the upper shell is located above the lower shell, the upper shell and the lower shell are fixedly connected, a plurality of supporting seats are arranged on the upper end face of the upper shell, the supporting seats and the upper shell are integrally formed in a die-casting mode, and first threaded holes are formed in the supporting seats. A plurality of first convex lugs are arranged on the peripheral wall of the motor shell, the first convex lugs correspond to the supporting seats one to one, second threaded holes are formed in the first convex lugs, and bolts penetrate through the first threaded holes and the second threaded holes at the same time and are in threaded connection with the first threaded holes and the second threaded holes so that the volute and the motor shell can be relatively fixed. The supporting seat and the upper shell are integrally formed by die-casting, so that the connection strength of the supporting seat and the upper shell is enhanced; the multiple first lugs are fixedly connected with the multiple supporting bases through bolts, the multiple supporting bases can jointly support the overall weight of the motor shell, the tensile strength of the supporting bases is higher than that of a support, the supporting bases are not prone to being bent, and therefore the situation that the coaxiality of the motor shell and the volute is affected due to deviation of the motor shell is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a centrifugal fan. Background Art

[0002] The outer shell of the centrifugal fan is assembled from the volute and the motor shell, that is, the volute and the motor shell need to be processed separately, and then assembled by workers. The connection strength of the volute and the motor shell has a great impact on the safety and balance of the centrifugal fan. Usually, a bracket is installed on the volute, and then the motor shell is fixed on the bracket to achieve the relative fixation of the volute and the motor shell. However, the existing bracket strength is low. After long-term use, the bracket may bend, causing the motor to deviate and cause the shaft to deviate, resulting in the centrifugal fan not being able to work properly. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model provides a centrifugal fan.

[0004] The present invention provides a centrifugal fan, which comprises:

[0005] A volute, the volute comprising an upper shell and a lower shell, the upper shell is located above the lower shell, the upper shell and the lower shell are fixedly connected, a plurality of support seats are provided on the upper end surface of the upper shell, the support seats are integrally die-cast with the upper shell, and the support seats are provided with a first threaded hole;

[0006] The motor housing has a plurality of first lugs on its outer peripheral wall, the plurality of first lugs correspond one-to-one to the plurality of support seats, the first lugs have second threaded holes, and bolts are simultaneously passed through and threadedly connected to the first threaded holes and the second threaded holes to relatively fix the volute and the motor housing.

[0007] The centrifugal fan according to the embodiment of the utility model has at least the following technical effects: the support seat and the upper shell are integrally die-cast, thereby enhancing the connection strength between the support seat and the upper shell; multiple first lugs are respectively fixedly connected to multiple support seats by bolts, and the multiple support seats can jointly support the overall weight of the motor shell. The support seat has higher tensile strength than the bracket and is not easy to bend, thereby avoiding the displacement of the motor shell and affecting the coaxiality of the motor shell and the volute.

[0008] According to some embodiments of the present invention, the upper end surface of the support seat protrudes upward to form a positioning protrusion, and the lower end surface of the first lug is recessed upward to form a positioning groove, and the positioning protrusion is inserted into the positioning groove.

[0009] According to some embodiments of the utility model, the upper shell is provided with a second lug, the lower shell is provided with a third lug, and bolts are simultaneously passed through and threadedly connected to the second lug and the third lug to relatively fix the upper shell and the lower shell.

[0010] According to some embodiments of the utility model, the lower shell is provided with a fourth lug, and the fourth lug is used to fix the volute on the frame.

[0011] According to some embodiments of the utility model, the motor housing includes a top cover, a barrel and a bottom cover, the top cover is located above the bottom cover, the barrel is located between the top cover and the bottom cover, and the barrel is fixedly connected to the top cover and the bottom cover respectively.

[0012] According to some embodiments of the utility model, the outer peripheral wall of the bottom cover is provided with the first lug, and the outer peripheral wall of the barrel is provided with a plurality of first reinforcing ribs, the plurality of first reinforcing ribs correspond one-to-one to the plurality of first lugs, and the lower end of the first reinforcing rib is attached to and fixedly connected to the first lug.

[0013] According to some embodiments of the utility model, a driving component is provided in the motor housing, and a rotating shaft of the driving component passes downward through the bottom cover.

[0014] According to some embodiments of the utility model, a bearing bin is provided at the lower end of the bottom cover, the bearing bin is connected to the inner cavity of the motor housing, a rotating bearing is provided in the bearing bin, the rotating shaft is downwardly passed through and rotatably connected to the rotating bearing, and the lower end of the rotating shaft is passed through the bearing bin.

[0015] According to some embodiments of the utility model, a heat dissipation blade is fixedly connected to the lower end of the rotating shaft, and the heat dissipation blade is located between the volute and the motor housing.

[0016] According to some embodiments of the present utility model, the outer peripheral wall of the bearing bin is connected to the lower end of the bottom cover via a plurality of second reinforcing ribs.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a schematic diagram of the structure of the centrifugal fan of some embodiments of the utility model;

[0020] Figure 2is a cross-sectional view of a centrifugal fan of some embodiments of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the volute of some embodiments of the utility model;

[0022] Figure 4 It is an exploded view of the volute of some embodiments of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the motor housing of some embodiments of the utility model;

[0024] Figure 6 It is an exploded view of the motor housing of some embodiments of the utility model.

[0025] Figure Number:

[0026] The volute 100, the upper shell 110, the support seat 120, the first threaded hole 121, the positioning protrusion 122, the second lug 123, the lower shell 130, the third lug 131, and the fourth lug 132;

[0027] Motor housing 200 , first lug 210 , second threaded hole 211 , positioning groove 212 , top cover 220 , barrel 230 , first reinforcing rib 231 , bottom cover 240 , second reinforcing rib 241 , driving component 250 , rotating shaft 251 , bearing compartment 260 , rotating bearing 261 , heat dissipation fan blade 270 . DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0033] According to some embodiments of the present invention, referring to Figures 1 to 6 The centrifugal fan includes a volute 100 and a motor housing 200. The volute 100 includes an upper housing 110 and a lower housing 130. The upper housing 110 is located above the lower housing 130. The upper housing 110 and the lower housing 130 are fixedly connected. A plurality of support seats 120 are provided on the upper end surface of the upper housing 110. The support seats 120 are integrally die-cast with the upper housing 110. The support seats 120 are provided with first threaded holes 121. A plurality of first lugs 210 are provided on the outer peripheral wall of the motor housing 200. The plurality of first lugs 210 correspond to the plurality of support seats 120 one by one. The first lugs 210 are provided with second threaded holes 211. Bolts are simultaneously passed through and threadedly connected to the first threaded holes 121 and the second threaded holes 211 to relatively fix the volute 100 and the motor housing 200.

[0034] It is understandable that the support seat 120 and the upper shell 110 are integrally die-cast, thereby enhancing the connection strength between the support seat 120 and the upper shell 110. The plurality of first lugs 210 are respectively fixedly connected to the plurality of support seats 120 by bolts, and the plurality of support seats 120 can jointly support the overall weight of the motor housing 200. The support seat 120 has a higher tensile strength than the bracket and is not easy to bend, thereby preventing the motor housing 200 from deflecting and affecting the coaxiality of the motor housing 200 and the volute 100.

[0035] According to some embodiments of the present invention, referring to Figure 4 and Figure 6 The upper end surface of the support seat 120 protrudes upward to form a positioning protrusion 122, and the lower end surface of the first lug 210 is recessed upward to form a positioning groove 212. The positioning protrusion 122 is inserted into the positioning groove 212 to facilitate the positioning connection between the support seat 120 and the first lug 210.

[0036] According to some embodiments of the present invention, referring to Figure 3 and Figure 4 The side wall of the upper shell 110 is provided with a plurality of second lugs 123, and the side wall of the lower shell 130 is provided with a plurality of third lugs 131. The plurality of second lugs 123 and the plurality of third lugs 131 correspond to each other one by one. Bolts are simultaneously passed through and threadedly connected to the second lugs 123 and the third lugs 131 to relatively fix the upper shell 110 and the lower shell 130.

[0037] According to some embodiments of the present invention, referring to Figure 3 and Figure 4 The lower shell 130 is provided with a fourth lug 132, and the fourth lug 132 is used to fix the volute 100 on the frame. Bolts are simultaneously passed through and threadedly connected to the fourth lug 132 and the frame to relatively fix the lower shell 130 and the frame.

[0038] According to some embodiments of the present invention, referring to Figure 5 and Figure 6 The motor housing 200 includes a top cover 220, a barrel 230 and a bottom cover 240. The top cover 220 is located above the bottom cover 240, and the barrel 230 is located between the top cover 220 and the bottom cover 240. The barrel 230 is fixedly connected to the top cover 220 and the bottom cover 240 respectively.

[0039] Preferably, refer to Figure 5 and Figure 6 A first lug 210 is provided on the outer peripheral wall of the bottom cover 240, and a plurality of first reinforcing ribs 231 are provided on the outer peripheral wall of the barrel 230. The plurality of first reinforcing ribs 231 correspond to the plurality of first lugs 210 one by one. The lower ends of the first reinforcing ribs 231 are attached to and fixedly connected to the first lugs 210, thereby strengthening the connection strength between the first lug 210 and the bottom cover 240 and preventing the first lug 210 and the bottom cover 240 from breaking at the connection.

[0040] According to some embodiments of the present invention, referring to Figure 2 A driving component 250 is provided in the motor housing 200, and a rotating shaft 251 of the driving component 250 is downwardly penetrated through the bottom cover 240. A bearing bin 260 is provided at the lower end of the bottom cover 240, and the bearing bin 260 is communicated with the inner cavity of the motor housing 200. A rotating bearing 261 is provided in the bearing bin 260, and the rotating shaft 251 is downwardly penetrated and rotatably connected to the rotating bearing 261. The lower end of the rotating shaft 251 is penetrated through the bearing bin 260, and the rotating bearing 261 can reduce the friction between the rotating shaft 251 and the bearing bin 260.

[0041] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The lower end of the rotating shaft 251 is fixedly connected with a heat dissipation blade 270 , and the heat dissipation blade 270 is located between the volute 100 and the motor housing 200 . The rotating shaft 251 drives the heat dissipation blade 270 to rotate, thereby enhancing the heat dissipation efficiency of the motor housing 200 .

[0042] According to some embodiments of the present invention, the outer peripheral wall of the bearing bin 260 is connected to the lower end of the bottom cover 240 via a plurality of second reinforcing ribs 241 , thereby enhancing the connection strength between the bearing bin 260 and the bottom cover 240 .

[0043] In the description of this specification, the description with reference to the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A centrifugal fan, characterized in that: include: A volute (100), the volute (100) comprising an upper shell (110) and a lower shell (130), the upper shell (110) being located above the lower shell (130), the upper shell (110) and the lower shell (130) being fixedly connected, a plurality of support seats (120) being provided on the upper end surface of the upper shell (110), the support seats (120) being integrally die-cast with the upper shell (110), and the support seats (120) being provided with a first threaded hole (121); A motor housing (200), wherein the outer peripheral wall of the motor housing (200) is provided with a plurality of first lugs (210), the plurality of first lugs (210) correspond one-to-one to the plurality of support seats (120), the first lugs (210) are provided with second threaded holes (211), and bolts are simultaneously passed through and threadedly connected to the first threaded holes (121) and the second threaded holes (211) so that the volute (100) and the motor housing (200) are relatively fixed.

2. The centrifugal fan according to claim 1, characterized in that: The upper end surface of the support seat (120) protrudes upward to form a positioning convex portion (122), and the lower end surface of the first lug (210) is recessed upward to form a positioning groove (212), and the positioning convex portion (122) is inserted into the positioning groove (212).

3. The centrifugal fan according to claim 1, characterized in that: The upper shell (110) is provided with a second lug (123), and the lower shell (130) is provided with a third lug (131). Bolts are simultaneously passed through and threadedly connected to the second lug (123) and the third lug (131) so that the upper shell (110) and the lower shell (130) are relatively fixed.

4. The centrifugal fan according to claim 1, characterized in that: The lower shell (130) is provided with a fourth lug (132), and the fourth lug (132) is used to fix the volute (100) on a frame.

5. The centrifugal fan according to claim 1, characterized in that: The motor housing (200) comprises a top cover (220), a barrel (230) and a bottom cover (240); the top cover (220) is located above the bottom cover (240); the barrel (230) is located between the top cover (220) and the bottom cover (240); and the barrel (230) is fixedly connected to the top cover (220) and the bottom cover (240), respectively.

6. The centrifugal fan according to claim 5, characterized in that: The outer peripheral wall of the bottom cover (240) is provided with the first lug (210), and the outer peripheral wall of the barrel (230) is provided with a plurality of first reinforcing ribs (231), the plurality of first reinforcing ribs (231) correspond one-to-one to the plurality of first lugs (210), and the lower ends of the first reinforcing ribs (231) are attached to and fixedly connected to the first lugs (210).

7. The centrifugal fan according to claim 5, characterized in that: A driving component (250) is disposed in the motor housing (200), and a rotating shaft (251) of the driving component (250) is downwardly penetrated through the bottom cover (240).

8. The centrifugal fan according to claim 7, characterized in that: A bearing bin (260) is provided at the lower end of the bottom cover (240), the bearing bin (260) is connected to the inner cavity of the motor housing (200), a rotating bearing (261) is provided in the bearing bin (260), the rotating shaft (251) is passed downward and is rotatably connected to the rotating bearing (261), and the lower end of the rotating shaft (251) is passed through the bearing bin (260).

9. The centrifugal fan according to claim 7, characterized in that: The lower end of the rotating shaft (251) is fixedly connected with a heat dissipation blade (270), and the heat dissipation blade (270) is located between the volute (100) and the motor housing (200).

10. The centrifugal fan according to claim 8, characterized in that: The outer peripheral wall of the bearing housing (260) is connected to the lower end of the bottom cover (240) via a plurality of second reinforcing ribs (241).

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