CN220706059U

CN220706059U - Centrifugal fan and air conditioner

Info

Publication number: CN220706059U
Application number: CN202321977691.1U
Authority: CN
Inventors: 黄杏桦
Original assignee: Guangdong TCL Intelligent HVAC Equipment Co Ltd
Current assignee: Guangdong TCL Intelligent HVAC Equipment Co Ltd
Priority date: 2023-07-25
Filing date: 2023-07-25
Publication date: 2024-04-02
Anticipated expiration: 2033-07-25

Abstract

The application provides a centrifugal fan and air conditioner. The centrifugal fan comprises a motor and at least one centrifugal fan blade, the centrifugal fan blade comprises an impeller, a bushing is arranged on the impeller, a shaft hole penetrating through the bushing is formed in the bushing, one of the bushing and a motor shaft of the motor is provided with internal threads, the other one of the bushing and the motor shaft is provided with external threads, and the motor shaft penetrates through the shaft hole and is connected with the bushing through the external threads and the internal threads. This application sets up the internal thread through one of them at the bush of centrifugal fan blade and the motor shaft of motor, sets up the external screw thread on the other to when assembly centrifugal fan blade and motor shaft, only need wear the motor shaft in locating the shaft hole, and pass through external screw thread and internal screw connection with the bush with the motor shaft can, assembly operation is simple and convenient, has improved assembly efficiency, and because need not use extra mounting such as screw, nut to lock, consequently can not have the easy loose problem of setscrew among the prior art.

Description

Centrifugal fan and air conditioner

Technical Field

The application belongs to the technical field of fans, and particularly relates to a centrifugal fan and an air conditioner.

Background

The centrifugal fan blade has the characteristics of large air supply quantity, long air supply distance, strong anti-static pressure capability and low noise, and is widely applied to ventilation and air conditioning in various places. The assembly mode of the centrifugal fan blade and the motor shaft of the centrifugal fan on the market mainly adopts a side locking screw mode, the centrifugal fan blade needs to be provided with a fixing screw in the direction perpendicular to the motor shaft, the assembly mode is complex in operation and inconvenient, the assembly efficiency is low, and the problem that the fixing screw is easy to loosen exists.

Disclosure of Invention

The embodiment of the application provides a centrifugal fan and an air conditioner, which are used for solving the problem that the assembly of a centrifugal fan blade and a motor shaft of the conventional centrifugal fan is not simple and convenient enough.

In a first aspect, an embodiment of the present application provides a centrifugal fan, the centrifugal fan includes motor and at least one centrifugal fan blade, the centrifugal fan blade includes the impeller, be provided with the bush on the impeller, the bush has been seted up and has been run through the shaft hole of bush, the bush with be equipped with the internal thread on one of them motor shaft of motor, be equipped with the external screw thread on the other, the motor shaft wear to locate in the shaft hole and with the bush passes through the external screw thread with internal screw thread connects.

Optionally, the inner wall of the shaft hole is provided with the internal thread, and the side wall of the motor shaft of the motor is provided with a section of external thread.

Optionally, the centrifugal fan comprises a plurality of centrifugal fan blades, and the plurality of centrifugal fan blades are sequentially arranged along the length direction of the motor shaft; in two adjacent centrifugal fan blades, one of them bush tip is equipped with the polygon jack, the polygon jack with the shaft hole intercommunication, another one the bush tip is equipped with the polygon boss, the polygon boss inserts in the polygon jack and with the unsmooth cooperation of polygon jack.

Optionally, the polygonal jack is a trilateral jack, a quadrilateral jack, a pentagonal jack or a hexagonal jack, and the polygonal boss is a trilateral boss, a quadrilateral boss, a pentagonal boss or a hexagonal boss matched with the polygonal jack.

Optionally, the motor shaft includes fixed section, linkage segment and guide section, fixed section the linkage segment with guide section is followed the axial of motor shaft connects gradually, fixed section is close to the motor housing setting of motor, the external screw thread sets up the lateral wall of linkage segment.

Optionally, the connecting section is close to the one end of fixed section is provided with spacing arch, spacing arch is located the external screw thread with between the fixed section, spacing arch can with the bush butt.

Optionally, the limiting protrusion is an annular protrusion arranged along the circumferential direction of the motor shaft; or the number of the limit protrusions is multiple, and the limit protrusions are distributed at intervals along the circumferential direction of the motor shaft; or, the number of the limit protrusions is one, and the limit protrusions are non-annular protrusions.

Optionally, the lateral wall of guide section is equipped with first flat position, the inner wall in shaft hole is equipped with the flat position of second, the flat position of second with the fit of first flat position.

Optionally, the bushing includes a trumpet-shaped connecting part and a straight rod-shaped connecting part, the large diameter end of the trumpet-shaped connecting part is connected with the impeller, the straight rod-shaped connecting part is connected with the small diameter end of the trumpet-shaped connecting part, and the internal thread is arranged at one end of the straight rod-shaped connecting part far away from the trumpet-shaped connecting part; and/or the outer wall of the bushing is provided with a first flat surface, the impeller is provided with a second flat surface, and the second flat surface is attached to the first flat surface.

Optionally, the motor is a double-shaft motor, the double-shaft motor comprises two motor shafts, the two motor shafts are symmetrically arranged at two ends of the double-shaft motor, and each motor shaft is connected with at least one centrifugal fan blade.

Optionally, the spiral line direction of the external thread is the same as the rotation direction of the motor shaft.

In a second aspect, embodiments of the present application further provide an air conditioner, where the air conditioner includes a centrifugal fan as described in any one of the above.

The centrifugal fan and the air conditioner provided by the embodiment of the application are characterized in that the internal thread is arranged on one of the bushing of the centrifugal fan blade and the motor shaft of the motor, and the external thread is arranged on the other one of the bushing of the centrifugal fan blade and the motor shaft, so that when the centrifugal fan blade and the motor shaft are assembled, the motor shaft only needs to be arranged in the shaft hole in a penetrating mode, the motor shaft and the bushing are connected through the external thread and the internal thread, the assembly operation is simple and convenient, the assembly efficiency is improved, and the assembly is carried out without using additional fixing pieces such as screws and nuts for locking, so that the problem that the screws are easy to loose in the prior art does not exist.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort to a person skilled in the art. Wherein like reference numerals refer to like parts throughout the following description.

Fig. 1 is a schematic structural diagram of a centrifugal fan according to an embodiment of the present application.

Fig. 2 is an enlarged schematic view of a portion a of the centrifugal fan shown in fig. 1.

Fig. 3 is a schematic structural diagram of a motor according to an embodiment of the present application.

Fig. 4 is an enlarged schematic view of a portion B of the motor shown in fig. 3.

Reference numerals illustrate:

100. a motor; 110. a motor shaft; 111. an external thread; 112. a fixed section; 113. a connection section; 114. a guide section; 115. a limit protrusion; 120. a motor housing; 200. centrifugal fan blades; 210. an impeller; 220. a bushing; 221. polygonal jacks; 222. polygonal boss; 223. a horn-shaped connection portion; 224. a straight rod-shaped connecting part.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The embodiment of the application provides a centrifugal fan, as shown in fig. 1-4, the centrifugal fan includes a motor 100 and at least one centrifugal fan blade 200, the centrifugal fan blade 200 includes an impeller 210, a bushing 220 is provided on the impeller 210, the bushing 220 is provided with a shaft hole penetrating through the bushing 220, one of the bushing 220 and a motor shaft 110 of the motor 100 is provided with internal threads, the other is provided with external threads 111, and the motor shaft 110 is arranged in the shaft hole in a penetrating manner and is connected with the bushing 220 through the external threads 111 and the internal threads.

According to the centrifugal fan provided by the embodiment of the application, the internal thread is arranged on one of the bushing 220 of the centrifugal fan blade 200 and the motor shaft 110 of the motor 100, and the external thread 111 is arranged on the other one, so that when the centrifugal fan blade 200 and the motor shaft 110 are assembled, the motor shaft 110 is only required to be arranged in the shaft hole in a penetrating mode, the motor shaft 110 and the bushing 220 are connected through the external thread 111 and the internal thread, namely, the centrifugal fan blade 200 and the motor shaft 110 are directly assembled through the mutual engagement of the internal thread and the external thread 111, the assembly operation is simple and convenient, the assembly efficiency is improved, and the problem that the fixing screw is easy to loosen in the prior art cannot exist because additional fixing pieces such as screws and nuts are not required to be used for locking.

In some embodiments of the present application, as shown in fig. 1-4, an inner thread may be provided on an inner wall of the shaft hole of the bushing 220, and a section of outer thread 111 may be provided on a side wall of the motor shaft 110 of the motor 100; during assembly, the centrifugal fan blade 200 is rotationally sleeved into the motor shaft 110 so as to enable the centrifugal fan blade 200 and the motor shaft 110 to generate a direct assembly relationship through mutual engagement of the internal threads and the external threads 111, the assembly operation is simple and convenient, and the assembly efficiency is improved. Alternatively, in other embodiments, the motor shaft 110 of the motor 100 may be provided with an internal thread, and the bushing 220 may be provided with an external thread 111, so long as the motor shaft 110 and the bushing 220 are connected by the external thread 111 and the internal thread.

The number of the centrifugal fan blades 200 may be one or more, and may be specifically set according to actual requirements. In some embodiments of the present application, the centrifugal fan includes a plurality of centrifugal fan blades 200, and the plurality of centrifugal fan blades 200 are sequentially arranged along the length direction of the motor shaft 110; in two adjacent centrifugal fan blades 200, the end part of the bushing 220 of one of the two centrifugal fan blades is provided with a polygonal jack 221, the polygonal jack 221 is communicated with the shaft hole, the end part of the bushing 220 of the other centrifugal fan blade is provided with a polygonal boss 222, and the polygonal boss 222 is inserted into the polygonal jack 221 and is in concave-convex fit with the polygonal jack 221. The polygonal insertion hole 221 refers to an insertion hole with a polygonal cross section, and the polygonal boss 222 refers to a boss with a polygonal cross section. The angle of the two centrifugal fan blades 200 in the circumferential direction can be restrained through polygonal characteristics after the two centrifugal fan blades 200 are matched through the polygonal insertion holes 221 and the polygonal bosses 222, and the two centrifugal fan blades 200 can synchronously rotate.

Optionally, the polygonal jack 221 is a trilateral jack, a quadrilateral jack, a pentagonal jack or a hexagonal jack, and the polygonal boss 222 is a trilateral boss, a quadrilateral boss, a pentagonal boss or a hexagonal boss matched with the polygonal jack 221. Preferably, the polygonal jack 221 is a regular polygonal jack, and the polygonal boss 222 is a regular polygonal boss, for example, the polygonal jack 221 may be a regular trilateral jack, a regular tetragonal jack, a regular pentagonal jack or a regular hexagonal jack, and the polygonal boss 222 may be a regular trilateral boss, a regular tetragonal boss, a regular pentagonal boss or a regular hexagonal boss, so that the polygonal boss 222 can be quickly and accurately inserted into the polygonal jack 221 during assembly, thereby further improving assembly efficiency. As shown in fig. 1, the centrifugal fan includes two centrifugal fan blades 200, and the two centrifugal fan blades 200 are sequentially arranged along the length direction of the motor shaft 110, as shown in fig. 2, a regular hexagon jack is disposed at the end of the bushing 220 of one centrifugal fan blade 200, the regular hexagon jack is communicated with the shaft hole, and a regular hexagon boss is disposed at the end of the bushing 220 of the other centrifugal fan blade 200, and is inserted into the regular hexagon jack and is in concave-convex fit with the regular hexagon jack.

Alternatively, as shown in fig. 3, the motor shaft 110 includes a fixing section 112, a connecting section 113 and a guiding section 114, the fixing section 112, the connecting section 113 and the guiding section 114 are sequentially connected in an axial direction of the motor shaft 110, the fixing section 112 is disposed near a motor housing 120 of the motor 100, and the external screw thread 111 is disposed on a side wall of the connecting section 113. When the centrifugal fan comprises a plurality of centrifugal fan blades 200, the shaft hole of each centrifugal fan blade 200 is sleeved into the motor shaft 110 in sequence during assembly, namely, one centrifugal fan blade 200 is sleeved into the motor shaft 110 until the internal thread of the centrifugal fan blade is positioned at the guide section 114, then the next centrifugal fan blade 200 is sleeved into the motor shaft 110 until the internal thread of the centrifugal fan blade is positioned at the guide section 114, two adjacent centrifugal fan blades 200 are matched with each other in the guide section 114 of the motor shaft 110 through the polygonal boss 222 and the polygonal slot, the internal threads of the two adjacent bushings 220 are connected by the polygonal boss 222 and the polygonal slot in a circumferential direction, and then the centrifugal fan blade 200 provided with the polygonal slot is fastened with the motor shaft 110 by using a wind batch (even if the internal thread of the centrifugal fan blade 200 is connected with the external thread 111 of the motor shaft 110), and the centrifugal fan blade 200 provided with the polygonal boss 222 is driven to rotate and is fastened with the motor shaft 110 synchronously. It should be noted that the number of internal threads on the bushing 220 of each centrifugal fan blade 200 is appropriate, and the length of the internal threads of the centrifugal fan blades 200 when they are engaged to rotate should be considered.

Optionally, as shown in fig. 3 and fig. 4, a limiting protrusion 115 is disposed at an end of the connecting section 113 near the fixed section 112, the limiting protrusion 115 is located between the external thread 111 and the fixed section 112, and the limiting protrusion 115 can be abutted with the bushing 220. By arranging the limiting protrusion 115, the centrifugal fan blade 200 can be positioned on the length of the motor shaft 110, so that the installation depth of the centrifugal fan blade 200 on the length of the motor shaft 110 is limited.

Alternatively, the limit projection 115 is an annular projection provided along the circumferential direction of the motor shaft 110, as shown in fig. 3 and 4; alternatively, the number of the limit protrusions 115 is plural, and the limit protrusions 115 are circumferentially spaced apart along the motor shaft 110; or, the number of the limiting protrusions 115 may be one, and the limiting protrusions 115 are non-annular protrusions, so that the above three structures can achieve the limiting effect, and the limiting device can be specifically set according to actual requirements.

In order to prevent the impeller 210 from being separated from the bushing 220 due to too large torque when the centrifugal fan blade 200 is tightly fastened with the motor shaft 110 by using the air lot, the bushing 220 rotates and the impeller 210 is static, the first flat surface is arranged on the outer wall of the bushing 220, the second flat surface which is attached to the first flat surface is arranged on the impeller 210, and the surface matching can effectively prevent the separation of the bushing 220 and the impeller 210 due to too large torque when the centrifugal fan blade 200 is tightly fastened with the motor shaft 110.

Alternatively, as shown in fig. 2, the bushing 220 includes a horn-shaped connection portion 223 and a straight rod-shaped connection portion 224, wherein a large diameter end of the horn-shaped connection portion 223 is connected with the impeller 210, the straight rod-shaped connection portion 224 is connected with a small diameter end of the horn-shaped connection portion 223, and the internal thread is disposed at an end of the straight rod-shaped connection portion 224 away from the horn-shaped connection portion 223. In this way, the distance between two adjacent centrifugal fan blades 200 can be shortened, so that the internal threads of two adjacent centrifugal fan blades 200 can be better connected, and the trumpet-shaped connecting portion 223 can avoid unbalance caused by stress concentration when the centrifugal fan blades 200 rotate.

In some embodiments of the present application, the motor 100 is a dual-shaft motor, the dual-shaft motor includes two motor shafts 110, the two motor shafts 110 are symmetrically disposed at two ends of the dual-shaft motor, and at least one centrifugal fan blade 200 is connected to each motor shaft 110. For convenience of description, the two motor shafts 110 are defined as a first motor shaft and a second motor shaft, respectively, and the centrifugal fan blade 200 is divided into a first centrifugal fan blade and a second centrifugal fan blade, the first centrifugal fan blade is connected to the first motor shaft, and the second centrifugal fan blade is connected to the second motor shaft.

Under the condition that the motor 100 works normally, when the motor shaft 110 drives the centrifugal fan blade 200 to rotate, the centrifugal fan blade 200 is given inertia, if the locking direction of the threads of the centrifugal fan blade 200 and the motor shaft 110 is inconsistent with the rotation direction of the motor shaft 110, the loosening risk exists, so that the spiral line direction of the external thread 111 is preferably set to be the same as the rotation direction of the motor shaft 110, that is, the rotation direction of the threaded connection of the internal thread and the external thread 111 is the same as the rotation direction of the motor shaft 110, and thus the tightness can be ensured when the centrifugal fan blade 200 rotates.

The embodiment of the application also provides an air conditioner, which comprises the centrifugal fan, and the specific structure of the centrifugal fan refers to the embodiment. Because the air conditioner adopts all the technical schemes of all the embodiments, the air conditioner at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

In the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first," "second," etc. may explicitly or implicitly include one or more features. The term "and/or" includes any and all combinations of one or more of the associated listed items.

The centrifugal fan and the air conditioner provided by the embodiment of the application are described in detail, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

Claims

1. The utility model provides a centrifugal fan, its characterized in that includes motor (100) and at least one centrifugal fan blade (200), centrifugal fan blade (200) include impeller (210), be provided with bush (220) on impeller (210), bush (220) are seted up and are run through the shaft hole of bush (220), bush (220) with be equipped with the internal thread on one of them motor shaft (110) of motor (100), be equipped with external screw thread (111) on the other, motor shaft (110) wear to locate in the shaft hole and with bush (220) are through external screw thread (111) with internal thread connection.

2. Centrifugal fan according to claim 1, wherein the inner wall of the shaft hole is provided with the internal thread, and the side wall of the motor shaft (110) of the motor (100) is provided with a section of the external thread (111).

3. The centrifugal fan according to claim 2, wherein the centrifugal fan comprises a plurality of the centrifugal fan blades (200), the plurality of centrifugal fan blades (200) being sequentially arranged along a length direction of the motor shaft (110);

in two adjacent centrifugal fan blades (200), one of them bush (220) tip is equipped with polygon jack (221), polygon jack (221) with shaft hole intercommunication, another one bush (220) tip is equipped with polygon boss (222), polygon boss (222) insert in polygon jack (221) and with polygon jack (221) unsmooth cooperation.

4. A centrifugal fan according to claim 3, wherein the polygonal insertion hole (221) is a trilateral insertion hole, a quadrilateral insertion hole, a pentagonal insertion hole or a hexagonal insertion hole, and the polygonal boss (222) is a trilateral boss, a quadrilateral boss, a pentagonal boss or a hexagonal boss matched with the polygonal insertion hole (221).

5. The centrifugal fan according to claim 2, wherein the motor shaft (110) comprises a fixing section (112), a connecting section (113) and a guiding section (114), the fixing section (112), the connecting section (113) and the guiding section (114) are sequentially connected along the axial direction of the motor shaft (110), the fixing section (112) is arranged close to a motor housing (120) of the motor (100), and the external thread (111) is arranged on the side wall of the connecting section (113).

6. The centrifugal fan according to claim 5, wherein a limiting protrusion (115) is provided at an end of the connecting section (113) close to the fixing section (112), the limiting protrusion (115) is located between the external thread (111) and the fixing section (112), and the limiting protrusion (115) can be abutted with the bushing (220).

7. The centrifugal fan according to claim 6, wherein the limit projection (115) is an annular projection provided along a circumferential direction of the motor shaft (110); or, the number of the limit protrusions (115) is a plurality, and the limit protrusions (115) are distributed at intervals along the circumferential direction of the motor shaft (110); alternatively, the number of the limit protrusions (115) is one, and the limit protrusions (115) are non-annular protrusions.

8. The centrifugal fan according to any one of claims 1 to 7, wherein the bushing (220) includes a horn-shaped connecting portion (223) and a straight rod-shaped connecting portion (224), a large diameter end of the horn-shaped connecting portion (223) is connected to the impeller (210), the straight rod-shaped connecting portion (224) is connected to a small diameter end of the horn-shaped connecting portion (223), and the internal thread is provided at an end of the straight rod-shaped connecting portion (224) away from the horn-shaped connecting portion (223); and/or

The outer wall of the bushing (220) is provided with a first flat surface, the impeller (210) is provided with a second flat surface, and the second flat surface is attached to the first flat surface.

9. The centrifugal fan according to claim 1, wherein the motor (100) is a double-shaft motor, the double-shaft motor comprises two motor shafts (110), the two motor shafts (110) are symmetrically arranged at two ends of the double-shaft motor, and at least one centrifugal fan blade (200) is connected to each motor shaft (110);

and/or the spiral line direction of the external thread (111) is the same as the rotation direction of the motor shaft (110).

10. An air conditioner comprising the centrifugal fan according to any one of claims 1 to 9.