Fixing structure of centrifugal wind wheel and motor and indoor electric appliance

Abstract

The utility model provides a centrifugal wind wheel and motor fixing structure and an indoor electric appliance, the fixing structure comprises a motor and a centrifugal wind wheel, the motor comprises a motor shaft, and the centrifugal wind wheel comprises a central sleeve hole; when the central sleeve hole of the centrifugal wind wheel is aligned to and pressed into the motor shaft of the motor, the motor shaft and the central sleeve hole are fixed in a buckled mode, and the motor and the centrifugal wind wheel are coaxially and fixedly connected. Due to the fact that the motor and the centrifugal wind wheel do not need to be tightened and fixed through a locknut in the prior art, a part needing to be independently assembled is omitted, assembly of the centrifugal wind wheel and the motor can be completed only through one downward pressing action, the number of the parts is reduced, and the assembly process is extremely simplified; in addition, the centrifugal wind wheel and the motor are fixed through a buckle and are very stable, and the problem that in the prior art, due to the fact that the pre-tightening force of a locknut is not easy to control, a plastic wind wheel deforms, and consequently the centrifugal wind wheel shakes is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of indoor electrical appliances, in particular to a fixing structure for a centrifugal impeller and a motor, and an indoor electrical appliance containing the fixing structure. Background Art

[0002] As Figure 1 shown, indoor ventilators and indoor heaters generally include components such as a centrifugal impeller 20, a motor 10, a volute casing and an air duct, etc., to achieve ventilation, air change and heating circulation of indoor air. In order to achieve the light weight of the product and improve the energy efficiency of the product at the same time, the centrifugal impeller 20 is usually made of a light plastic material such as PP (polypropylene).

[0003] The connection method between the centrifugal impeller 20 and the motor 10 is to sleeved the hole in the center of the centrifugal impeller 20 onto the motor shaft of the motor 10. There is a threaded structure at the top of the motor shaft, and a metal locknut 30 is used to lock the centrifugal impeller 20 on the motor shaft. If the electrical appliance product is a Class II electrical appliance that meets the national standard GB4706.1, an insulating cap 40 should also be sleeved on the metal locknut 30 to ensure that people cannot touch any metal parts on the motor and the motor shaft during the use and maintenance of the product.

[0004] However, the applicant found that the above structure adds a locknut 30, which needs to be installed additionally. With more parts, there are more processes, increasing the difficulty of assembly automation; in addition, the pre-locking force of the locknut 30 is not easy to control. If the pre-locking force is too loose, the locknut 30 is likely to loosen. If the pre-locking force is too tight, the light plastic material will deform, easily causing the centrifugal impeller 20 to vibrate.

[0005] Therefore, the connection method between the centrifugal impeller 20 and the motor 10 in the existing indoor electrical appliances has the technical problems of complex assembly and easy deformation of the plastic centrifugal impeller 20, resulting in the vibration of the centrifugal impeller 20. Summary of the Utility Model

[0006] Embodiments of the present application provide a fixing structure for a centrifugal impeller and a motor, and an indoor electrical appliance, so as to solve the technical problems that the connection method between the centrifugal impeller and the motor in the existing indoor electrical appliances is complex in assembly and the plastic centrifugal impeller is easy to deform, resulting in the vibration of the centrifugal impeller.

[0007] To solve the above technical problems, in a first aspect, embodiments of the present application provide a fixing structure for a centrifugal impeller and a motor, including a motor and a centrifugal impeller. The motor includes a motor shaft, and the centrifugal impeller includes a central sleeve hole. When the central sleeve hole of the centrifugal impeller is aligned with and pressed onto the motor shaft of the motor, the motor shaft and the central sleeve hole are fixed by buckling, and the motor and the centrifugal impeller are coaxially and fixedly connected.

[0008] Further, a clamping groove is provided on the motor shaft, and a locking buckle that can be embedded in the clamping groove is provided on the centrifugal air wheel. Align the central sleeve hole of the centrifugal air wheel with the motor shaft of the motor and press it in. The locking buckle is snapped into the clamping groove.

[0009] Further, a notch extending along the axial direction of the motor shaft is provided on the motor shaft, and a stepped surface that engages with the notch is provided on the inner wall of the central sleeve hole. When the central sleeve hole of the centrifugal air wheel is aligned with the motor shaft of the motor and pressed in, the stepped surface can abut against the supporting surface of the notch.

[0010] Further, a ring groove is also provided on the motor shaft, and the ring groove is used for clamping an open circlip. After the central sleeve hole of the centrifugal air wheel is aligned with the motor shaft of the motor and pressed in, the open circlip abuts against the bottom surface of the central sleeve hole upward for limiting.

[0011] Further, an insulating cover that can cover or partially cover the free end of the motor shaft is formed on the centrifugal air wheel.

[0012] Further, the insulating cover is fixed integrally with the centrifugal air wheel.

[0013] Further, the insulating cover and the centrifugal air wheel are integrally formed.

[0014] Further, a part of the outer wall at the top of the central sleeve hole is bent and extended radially to form the insulating cover.

[0015] Further, the clamping groove is an arc-shaped groove arranged along the circumferential direction of the motor shaft, the locking buckle is an arc-shaped convex block extending along the circumferential direction of the central sleeve hole, and both ends of the arc-shaped groove in the circumferential direction are communicated with the notch.

[0016] Further, the cross-sectional shape of the notch is D-shaped.

[0017] In a second aspect, an indoor electrical appliance is further provided in an embodiment of the present application. The indoor electrical appliance includes a fixing structure of the centrifugal air wheel and the motor as described in any item of the first aspect.

[0018] As can be seen from the above description, for the indoor electrical appliance described in the present application, since the motor and the centrifugal air wheel do not need to be tightened and fixed with a locknut in the prior art, not only is one part that needs to be assembled separately reduced, but also the assembly of the centrifugal air wheel and the motor can be completed with only one pressing action, realizing fewer parts and extremely simplified assembly process. In addition, the centrifugal air wheel and the motor are fixed by buckles, which is very stable, and there will be no problem of deformation of the plastic air wheel caused by poor control of the pre-tightening force of the locknut in the prior art, resulting in jitter of the centrifugal air wheel. The above assembly method of the plastic air wheel and the motor is the first application in the industries of bathroom heaters and exhaust fans.

[0019] Further, by using an insulating cover fixedly integrated with the centrifugal impeller to replace the additional insulating cap part in the prior art, not only is one less part that needs to be assembled individually, but also since the insulating cover is integrally connected to the centrifugal impeller, when the centrifugal impeller and the motor are assembled, the installation of the insulating cover is synchronously completed, further achieving fewer parts and extremely simplified assembly processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the connection structure between the centrifugal impeller and the motor in the prior art;

[0022] Figure 2 Schematic diagram of the structure of the centrifugal impeller and the motor in an embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the structure of the motor in an embodiment of the present invention;

[0024] Figure 4 Partial schematic diagram of the structure of the centrifugal impeller in an embodiment of the present invention;

[0025] Figure 5 Cross-sectional view of the structure of the assembled centrifugal impeller and the motor in an embodiment of the present invention;

[0026] Figure 6 Partial cross-sectional view of the assembled centrifugal impeller and the motor in an embodiment of the present invention;

[0027] Figure 7 Top view of the assembled centrifugal impeller and the motor in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The embodiments of the present application provide a fixing structure for a centrifugal impeller and a motor and an indoor appliance to solve the technical problems that the connection method between the centrifugal impeller and the motor in the indoor appliance in the prior art is complex in assembly and the plastic centrifugal impeller is prone to deformation, resulting in the shaking of the centrifugal impeller.

[0029] To better understand the above technical solutions, the following will detail the above technical solutions in combination with the drawings in the specification and specific embodiments.

[0030] As Figure 2As shown, in one or more embodiments of the present application, an indoor electrical appliance is provided. The indoor electrical appliance includes a motor 100 and a centrifugal impeller 200. For example, the indoor electrical appliance can be an indoor ventilator and an indoor heater. The motor 100 and the centrifugal impeller 200 are coaxially and fixedly connected to synchronously drive the centrifugal impeller 200 to rotate, thereby driving the centrifugal impeller 200 to intake air axially and discharge air circumferentially.

[0031] As Figure 3 shown, the motor 100 includes a motor shaft 110. The motor shaft 110 is made of metal. A notch 130 with a D-shaped cross-section is formed on a section of the motor shaft 110 near the free end. The notch 130 extends along the axial direction of the motor shaft 110 and forms a support surface 140. A clamping groove 150 for clamping and cooperating with a latch 232 described below is also provided on the circumferential surface of the motor shaft 110 opposite to the notch 130. The clamping groove 150 is an arc-shaped groove arranged along the circumferential direction of the motor shaft 110. Of course, the cross-sectional shape of the notch 130 can also be fan-shaped, U-shaped, etc., which is not limited herein, but the D-shaped is easier to process.

[0032] As Figure 1 、 4 shown, the centrifugal impeller 200 is made of plastic. The centrifugal impeller 200 includes an impeller center 210 and a plurality of fan blades 220 arranged around the impeller center 210. A central sleeve hole 230 is provided on the impeller center 210. A stepped surface 231 that engages with the notch 130 is provided on the inner wall of the central sleeve hole 230, and a latch 232 that can be embedded in the clamping groove 150. The latch 232 is an arc-shaped protrusion extending along the circumferential direction of the central sleeve hole 230.

[0033] As Figures 5 to 7 shown, when the centrifugal impeller 200 and the motor 100 are assembled, the central sleeve hole 230 of the centrifugal impeller 200 is aligned with and pressed onto the motor shaft of the motor 100. The latch 232 is snapped into the clamping groove 150, and the stepped surface 231 abuts against the support surface 140 of the notch 130, so that the motor 100 and the centrifugal impeller 200 are axially and radially fixed.

[0034] Since the motor 100 and the centrifugal impeller 200 do not need to be tightened and fixed with the locknut 30 in the prior art, not only is one part that needs to be assembled separately reduced, but only one pressing action is required to complete the assembly of the centrifugal impeller 200 and the motor 100, achieving fewer parts and extremely simplified assembly processes. Additionally, the centrifugal impeller 200 and the motor 100 are fixed by buckles, which is very stable and there will be no problem of the plastic impeller deforming due to the poor control of the pre-tightening force of the locknut 30 in the prior art, resulting in the shaking of the centrifugal impeller 200. The above assembly method of the plastic impeller and the motor 100 is the first application in the industry of bathroom heaters and exhaust fans.

[0035] In addition, the lock 232 and the slot 150 can also be of other shapes, such as a spherical lock 232 and a spherical slot 150, or a cylindrical lock 232 and a cylindrical slot 150, etc. This is not limited here, as long as the snap fixation of the motor shaft 110 and the centrifugal impeller 200 can be achieved. In addition, the positions of the lock 232 and the slot 150 can also be swapped, that is, the lock 232 is arranged on the motor shaft 110 and the slot 150 is arranged on the central sleeve hole 230.

[0036] Of course, the slot 150 can also be arranged at other positions on the motor shaft 110, but the slot 150 needs to be a non-circular groove to simultaneously achieve the axial and radial fixation of the motor 100 and the centrifugal impeller 200. Therefore, the slot 150 is arranged opposite to the notch 130, and the two circumferential ends of the slot 150 start and end at the notch 130, that is, it is connected to the notch 130, which is convenient for processing.

[0037] In addition, due to the existence of the notch 130, part of the motor shaft 110 is non-circular, which avoids relative rotation with the centrifugal impeller 200 and can smoothly drive the centrifugal impeller 200 to rotate synchronously.

[0038] Furthermore, as Figures 2 to 6 shown, a ring groove is also provided on the motor shaft 110. The ring groove is used to clamp the open circlip 120, and the open circlip 120 is used to limit and press against the bottom surface of the central sleeve hole 230 upward, which is the lower limit of the centrifugal impeller 200 to further limit the axial position of the centrifugal impeller 200 on the motor shaft 110. When assembling the centrifugal impeller 200 and the motor 100, align the central sleeve hole 230 of the centrifugal impeller 200 and press it onto the motor shaft of the motor 100. After the lock 232 snaps into the slot 150 and the step surface 231 abuts against the axial support surface 140 axially, just snap the open circlip 120 into the ring groove, which is very convenient.

[0039] As Figure 1As shown, in the prior art, if the indoor electrical appliance is a Class II appliance that meets the national standard GB4706.1, an insulating cap 40 is also sleeved on the metal locknut 30 to ensure that during the use and maintenance of the product, people cannot touch any metal parts on the motor and the motor shaft, and an additional part that needs to be installed separately is added, further increasing the difficulty of assembly automation.

[0040] As Figures 2 to 7 As shown, a part of the outer wall of the central sleeve hole 230 extends radially and bends to form an insulating cover 240 that can cover or partially cover the free end of the motor shaft 110, ensuring that during the use and maintenance of the product, people cannot touch any metal parts on the motor 100 and the motor shaft 110, preventing electric shock, improving the use safety, and meeting the requirements of Class II appliances in the national standard GB4706.1. Moreover, the insulating cover 240 and the centrifugal impeller 200 can be fixedly connected as a whole or integrally formed, and the material of the insulating cover 240 is the same as that of the centrifugal impeller 200.

[0041] By replacing the insulating cap part additionally provided in the prior art with the insulating cover 240 fixedly integrated with the centrifugal impeller 200, not only is one less part that needs to be assembled separately, but also since the insulating cover 240 and the centrifugal impeller 200 are connected as a whole, when the centrifugal impeller 200 and the motor 100 are assembled, the installation of the insulating cover 240 is synchronously completed, realizing fewer parts and extremely simplified assembly processes.

[0042] It should be understood that although terms such as "first" and "second" may be used here to describe each unit, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, the first unit may be called the second unit, and similarly, the second unit may be called the first unit.

[0043] The outer, middle, inner and other orientation terms mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts and may therefore change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0044] The above are only the preferred embodiments of the present application, and do not impose any formal or substantial restrictions on the present application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the method of the present application, several improvements and supplements can still be made, and these improvements and supplements should also be regarded as within the protection scope of the present utility model. Those skilled in the art, without departing from the spirit and scope of the present application, when making some equivalent changes such as minor modifications, decorations, and evolutions by using the technical content disclosed above, are all equivalent embodiments of the present application; at the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the substantial technology of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A fixing structure for a centrifugal impeller and a motor, characterized in that It includes a motor (100) and a centrifugal impeller (200). The motor (100) includes a motor shaft (110), and the centrifugal impeller (200) includes a central sleeve hole (230). When the central sleeve hole (230) of the centrifugal impeller (200) is aligned with and pressed onto the motor shaft of the motor (100), the motor shaft (110) and the central sleeve hole (230) are snap-fixed, and thus the motor (100) and the centrifugal impeller (200) are coaxially and fixedly connected.

2. The fixed structure of a centrifugal impeller and a motor according to claim 1, characterized in that, A clamping groove (150) is provided on the motor shaft (110), and a locking buckle (232) that can be embedded in the clamping groove (150) is provided on the centrifugal impeller (200). When the central sleeve hole (230) of the centrifugal impeller (200) is aligned with and pressed onto the motor shaft of the motor (100), the locking buckle (232) snaps into the clamping groove (150).

3. The fixed structure of a centrifugal impeller and a motor according to claim 2, characterized in that, A notch (130) extending along the axial direction of the motor shaft (110) is provided on the motor shaft (110), and a stepped surface (231) that engages with the notch (130) is provided on the inner wall of the central sleeve hole (230). When the central sleeve hole (230) of the centrifugal impeller (200) is aligned with and pressed onto the motor shaft of the motor (100), the stepped surface (231) can abut against the supporting surface (140) of the notch (130).

4. The fixed structure of a centrifugal impeller and a motor according to claim 1, characterized in that, A ring groove is further provided on the motor shaft (110), and the ring groove is used for clamping an open circlip (120). After the central sleeve hole (230) of the centrifugal impeller (200) is aligned with and pressed onto the motor shaft of the motor (100), the open circlip (120) abuts against and tightly limits the bottom surface of the central sleeve hole (230) upward.

5. The fixed structure of a centrifugal wind wheel and a motor according to claim 1, characterized in that, An insulating cover (240) that can cover or partially cover the free end of the motor shaft (110) is formed on the centrifugal impeller (200).

6. The fixed structure of a centrifugal wind wheel and a motor according to claim 5, characterized in that, The insulating cover (240) is fixedly integrated with or integrally formed with the centrifugal impeller (200).

7. The fixed structure of a centrifugal impeller and a motor according to claim 6, characterized in that, A part of the outer wall at the top of the central sleeve hole (230) is bent and extended radially to form the insulating cover (240).

8. The fixed structure of a centrifugal impeller and a motor according to claim 3, characterized in that, The clamping groove (150) is an arc-shaped groove provided along the circumferential direction of the motor shaft (110), and the locking buckle (232) is an arc-shaped protrusion extending along the circumferential direction of the central sleeve hole (230), and both ends of the arc-shaped groove in the circumferential direction are communicated with the notch (130).

9. The fixed structure of a centrifugal wind wheel and a motor according to claim 3, characterized in that The cross-sectional shape of the notch (130) is D-shaped.

10. An indoor electrical appliance, characterized in that, The indoor electrical appliance includes a fixing structure for the centrifugal impeller and the motor as described in any one of claims 1 to 9.

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