Waterproof structure of volute motor

Abstract

The utility model discloses a waterproof structure of a volute motor, the volute motor comprises a stator assembly, a rotor assembly and a motor casing, and a motor shaft of the rotor assembly is installed and connected with a bearing seat in a relative rotation manner through a bearing; foam is fixedly arranged on the motor shell, and the motor shaft penetrates through the foam and then extends into the motor shell. Wherein the inner circumference of the foam is provided with a step-shaped groove, and a metal plate is fixedly arranged on the motor shell; the outer periphery of the bearing seat is fixedly arranged on the inner periphery of the metal plate in a sleeving manner, and the motor shell and the end part of the bearing seat extrude the foam up and down to form a sealing cavity for the bearing; according to the utility model, the waterproof performance of the volute motor is ensured, the friction between the motor shaft and the sealing ring in the prior art is effectively avoided, and the working efficiency of the volute motor is improved.

Description

Technical Field

[0001] The utility model belongs to the field of electric fans, and in particular relates to a waterproof structure of a volute motor. Background Art

[0002] Current solutions for waterproofing volute motors often employ shaft seals and labyrinth circuits. However, shaft seals and labyrinth circuits inevitably cause friction between components, which reduces motor efficiency. Furthermore, over extended operation, friction between components can lead to gaps, rendering the volute motor waterproof.

[0003] Therefore, the applicant hopes to seek technical solutions to solve the above technical problems. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a waterproof structure of a volute motor, which ensures the waterproof performance of the volute motor while effectively avoiding the friction between the motor shaft and the sealing ring in the prior art, thereby improving the working efficiency of the volute motor.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A waterproof structure for a volute motor, the volute motor comprising a stator assembly, a rotor assembly and a motor housing, wherein the motor shaft of the rotor assembly is mounted and connected to a bearing seat for relative rotation via a bearing; the motor housing is fixed with foam, and the motor shaft extends into the interior of the motor housing after passing through the foam; wherein,

[0007] The inner periphery of the foam is provided with a stepped groove, and the motor housing is fixed with a metal plate;

[0008] The outer periphery of the bearing seat is fixedly sleeved on the inner periphery of the metal plate, and the motor housing and the end portions of the bearing seat squeeze the foam up and down to form a sealing cavity for the bearing.

[0009] Preferably, the sealing cavity is filled with sealing grease.

[0010] Preferably, the motor housing includes an upper shell and a lower shell seat installed as one body, wherein the motor shaft extends into the interior of the motor housing and is fixedly connected to the impeller, and the outer surface of the lower shell seat is fixedly provided with the foam and the metal plate.

[0011] Preferably, an outer surface of the lower shell seat is provided with an embedding groove, and the foam is fixedly embedded in the embedding groove.

[0012] Preferably, the foam is an annular foam body, and the groove is provided on the inner circumference of the foam body; wherein the opening direction of the groove is toward the bearing, and the bearing seat is in extrusion contact with the end face of the foam body where the opening is located, so that the groove becomes a sealed cavity for the bearing.

[0013] Preferably, the end of the bearing seat is in extrusion contact with one end surface of the foam; wherein the foam and the bearing seat are coaxially installed, and the outer diameter of the foam is larger than the outer diameter of the bearing seat.

[0014] Preferably, the metal plate is a heat-conducting metal plate, an end surface of which is in insulating and heat-conducting contact with the motor control board, and the motor control board and the heat-conducting metal plate are respectively fixedly mounted on the motor housing by fasteners.

[0015] Preferably, the heat-conducting metal plate is fixedly mounted on the outer periphery of the bearing seat by means of interference fit, and the motor control board is mounted on the outer periphery of the bearing seat by means of clearance fit.

[0016] Preferably, the heat-conducting metal plate is a galvanized metal plate.

[0017] Preferably, the distance between the bearing and the bottom of the groove is in the range of 0.3-2 mm.

[0018] The present application proposes to set a foam structure on the motor casing, set a step-shaped groove on the inner periphery of the foam, and at the same time fix the outer periphery of the bearing seat on the inner periphery of the metal plate. The motor casing and the end of the bearing seat squeeze the foam up and down, thereby forming a sealed cavity for the bearing (preferably filled with sealing grease), preventing water from entering the bearing, ensuring the waterproof performance of the volute motor, and effectively avoiding the friction between the motor shaft and the sealing ring in the existing technology, thereby improving the working efficiency of the volute motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the volute motor in accordance with a specific embodiment of the present invention;

[0020] Figure 2 It is a cross-sectional view of the volute motor in a specific embodiment of the present utility model;

[0021] Figure 3 yes Figure 2 A magnified view of the local structure. DETAILED DESCRIPTION

[0022] An embodiment of the utility model discloses a waterproof structure of a volute motor, wherein the volute motor includes a stator assembly, a rotor assembly and a motor casing, wherein the motor shaft of the rotor assembly is mounted and connected to the bearing seat for relative rotation via a bearing; the motor casing is fixedly provided with foam, and the motor shaft extends into the interior of the motor casing after passing through the foam; wherein the inner periphery of the foam is provided with a stepped groove, and the motor casing is fixed with a metal plate; the outer periphery of the bearing seat is fixedly sleeved on the inner periphery of the metal plate, and the motor casing and the end portions of the bearing seat squeeze the foam up and down to form a sealed cavity for the bearing.

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0024] Please refer to Figure 1 、 Figure 2 and Figure 3 As shown, a waterproof structure of a volute motor is shown. The volute motor includes a stator assembly 10, a rotor assembly 20 and a motor casing 30. The stator assembly 10 is located on the inner periphery of the rotor assembly 20; the motor shaft 21 of the rotor assembly 20 is mounted and connected to the bearing seat 40 for relative rotation through a bearing 22; the motor casing 30 is fixedly provided with a foam 50, and the motor shaft 21 extends into the interior of the motor casing 30 after passing through the foam 50; wherein, the inner periphery of the foam 50 is provided with a stepped groove 51, and the motor casing 30 is fixed with a metal plate 31; the outer periphery of the bearing seat 40 is fixedly sleeved on the inner periphery of the metal plate 31, and the ends of the motor casing 30 and the bearing seat 40 squeeze the foam 50 up and down to form a sealing cavity 60 for the bearing 22; preferably, in this embodiment, preferably, the spacing between the bearing 22 and the bottom of the groove 51 is in the range of 0.3-2 mm, more preferably 0.5-1 mm; preferably, in this embodiment, the sealing cavity 60 is filled with sealing grease (not shown in the figure).

[0025] Preferably, in order to facilitate convenient installation, in the present embodiment, the motor housing 30 includes an upper shell 30a and a lower shell seat 30b installed as one body, wherein the motor shaft 21 extends into the interior of the motor housing 30 and is fixedly connected to the impeller 70, and the outer surface of the lower shell seat 30b is fixedly provided with a foam 50 and a metal plate 31; in order to ensure the installation effect of the foam 50, further preferably, in the present embodiment, the outer surface of the lower shell seat 30b is provided with an embedding groove 32, and the foam 50 is fixedly embedded in the embedding groove 32; preferably, in order to improve the sealing effect, in the present embodiment, the end of the bearing seat 40 is extruded and contacted with one end face of the foam 50; wherein the foam 50 and the bearing seat 40 are coaxially installed, and the outer diameter of the foam 50 is larger than the outer diameter of the bearing seat 40.

[0026] Preferably, in order to further ensure the sealing effect and avoid friction between structural parts, in this embodiment, the foam 50 is an annular foam body, and a groove 51 is provided on the inner periphery of the foam body; wherein, the opening direction of the groove 51 is toward the bearing 22, and the bearing seat 22 is squeezed into contact with the end face of the foam body where the opening is located, so that the groove 51 becomes a sealing cavity 60 for the bearing 22.

[0027] Preferably, in order to ensure that the bearing seat 22 forms a stable and reliable extrusion effect on the foam 50, and ensure the stability of the installation of the bearing seat 40, while facilitating the heat dissipation effect of the volute motor, in this embodiment, the metal plate 31 is a heat-conducting metal plate, and its end face is insulated and heat-conducting contact with the motor control board 33, and the motor control board 33 and the heat-conducting metal plate 31 are respectively fixedly mounted on the motor housing 30 by fasteners (usually screws); further preferably, in this embodiment, the metal plate 31 specifically adopts a galvanized metal plate; the heat-conducting metal plate is fixedly mounted on the outer periphery of the bearing seat 40 by an interference fit, and the motor control board 33 is mounted on the outer periphery of the bearing seat 40 by a clearance fit.

[0028] This embodiment proposes to provide a foam 50 structure on the motor housing 30, and to provide a stepped groove 51 on the inner periphery of the foam 50. At the same time, the outer periphery of the bearing seat 40 is fixedly sleeved on the inner periphery of the metal plate 31. The motor housing 30 and the ends of the bearing seat 40 squeeze the foam 50 up and down, thereby forming a sealing cavity 60 (filled with sealing grease) for the bearing 22, preventing water from entering the bearing 22, ensuring the waterproof performance of the volute motor, and effectively avoiding the friction between the motor shaft 21 and the sealing ring in the prior art, thereby improving the working efficiency of the volute motor.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method includes only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A waterproof structure for a volute motor, the volute motor comprising a stator assembly, a rotor assembly, and a motor housing, wherein the motor shaft of the rotor assembly is connected to a bearing seat for relative rotation via a bearing; characterized in that: The motor housing is fixed with foam, and the motor shaft passes through the foam and extends into the interior of the motor housing; wherein, The inner periphery of the foam is provided with a stepped groove, and the motor housing is fixed with a metal plate; The outer periphery of the bearing seat is fixedly sleeved on the inner periphery of the metal plate, and the motor housing and the end portions of the bearing seat squeeze the foam up and down to form a sealing cavity for the bearing.

2. The waterproof structure of the volute motor according to claim 1, characterized in that: The sealing cavity is filled with sealing grease.

3. The waterproof structure of the volute motor according to claim 1, characterized in that: The motor housing includes an upper shell and a lower shell seat installed as an integral body, wherein the motor shaft extends into the interior of the motor housing and is fixedly connected to the impeller, and the outer surface of the lower shell seat is fixedly provided with the foam and the metal plate.

4. The waterproof structure of the volute motor according to claim 3, characterized in that: An outer surface of the lower shell seat is provided with an embedding groove, and the foam is fixedly embedded in the embedding groove.

5. The waterproof structure of the volute motor according to claim 3, characterized in that: The foam is an annular foam body, and the groove is provided on the inner circumference of the foam body; wherein, the opening direction of the groove is toward the bearing, and the bearing seat is in extrusion contact with the end face of the foam body where the opening is located, so that the groove becomes a sealed cavity for the bearing.

6. The waterproof structure of the volute motor according to claim 1, characterized in that: The end of the bearing seat is in extrusion contact with one end surface of the foam; wherein the foam and the bearing seat are coaxially installed, and the outer diameter of the foam is larger than the outer diameter of the bearing seat.

7. The waterproof structure of the volute motor according to claim 1, characterized in that: The metal plate is a heat-conducting metal plate, and its end surface is insulated and heat-conducting contact with the motor control board. The motor control board and the heat-conducting metal plate are respectively fixedly mounted on the motor housing by fasteners.

8. The waterproof structure of the volute motor according to claim 7, characterized in that: The heat-conducting metal plate is fixedly sleeved on the outer periphery of the bearing seat by means of interference fit, and the motor control board is sleeved on the outer periphery of the bearing seat by means of clearance fit.

9. The waterproof structure of the volute motor according to claim 7 or 8, characterized in that: The heat-conducting metal plate is a galvanized metal plate.

10. The waterproof structure of the volute motor according to claim 1, 7 or 8, characterized in that: The distance between the bearing and the bottom of the groove is in the range of 0.3-2 mm.

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