Waterproof motor

Abstract

The utility model discloses a waterproof motor, which comprises a stator and a motor end cover, and is characterized in that the motor end cover is connected with the stator; the waterproof motor further comprises a sealing gasket, the sealing gasket comprises an annular body and a first annular part located on the inner wall of the annular body, the first annular part is provided with a first protruding part, and the first protruding part is used for being clamped between the stator and the motor end cover; the motor end cover comprises an end cover body and a second annular part located on the circumferential outer edge of the end cover body, and the first annular part and the second annular part are connected in a matched mode; or, the stator comprises a stator body and a stator cavity located in the stator body, the inner wall of the stator cavity comprises at least two stator end faces which are arranged in a staggered mode in the height direction, and an annular inner arc face is formed between every two adjacent stator end faces; the motor end cover comprises an end cover body, annular outer arc surfaces which are arranged on the circumferential outer edge of the end cover body and are in one-to-one correspondence and matching connection with the annular inner arc surfaces, and end cover end surfaces which are in corresponding and matching connection with the stator end surfaces.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a waterproof motor. Background Art

[0002] With the development of the air-conditioning industry, people have higher requirements for the reliability of air conditioners. However, since outdoor air conditioners are exposed to the outside for a long time, high requirements are placed on the waterproofness of the motor. Once water enters the motor, it will cause the surface of the stator and rotor core to rust and get stuck, and even corrode the internal windings of the motor, causing problems such as short circuit between turns and burning.

[0003] In the related art, the motor can be waterproofed by using a motor end cover waterproofing and interference fit connection solution. However, this solution has high requirements on process stability. If the component precision is not well controlled, the expected interference fit effect cannot be achieved. Utility Model Content

[0004] In view of this, an embodiment of the present application provides a waterproof motor, which can improve the waterproof performance of the motor, and has a simple product structure and strong practicality.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a waterproof motor, the waterproof motor comprising: a stator and a motor end cover, the motor end cover being connected to the stator;

[0007] The waterproof motor further comprises: a sealing gasket, the sealing gasket comprising an annular body and a first annular portion located on the inner wall of the annular body, a first protrusion being arranged on the first annular portion, the first protrusion being used to be inserted between the stator and the motor end cover; the motor end cover comprises an end cover body and a second annular portion located on the circumferential outer edge of the end cover body, the first annular portion being matched and connected with the second annular portion; or,

[0008] The stator includes a stator body and a stator cavity located in the stator body, the inner wall of the stator cavity includes at least two stator end faces arranged in a staggered manner in the height direction, and an annular inner arc surface is formed between two adjacent stator end faces; the motor end cover includes an end cover body and an annular outer arc surface arranged on the circumferential outer edge of the end cover body and matched and connected with each of the annular inner arc surfaces in a one-to-one correspondence, and an end cover end face matched and connected with each of the stator end faces.

[0009] In some embodiments, a positioning hole is further provided on the first annular portion, and a second protrusion is provided on the second annular portion, and the second protrusion is used to be inserted into the positioning hole.

[0010] In some embodiments, the first annular portion is further provided with a first matching annular portion and a second matching annular portion arranged in a height direction, the first protruding portion is located between the first matching annular portion and the second matching annular portion, and the first matching annular portion is provided with the positioning hole;

[0011] The stator comprises a stator body and a stator cavity located in the stator body, and a third annular portion is arranged on the inner wall of the stator cavity;

[0012] Wherein, the first matching annular portion is matched and connected with the second annular portion, and the second matching annular portion is matched and connected with the third annular portion.

[0013] In some embodiments, the first mating annular portion and the second annular portion, and the second mating annular portion and the third annular portion are connected by interference fit.

[0014] In some embodiments, the first mating annular portion and the second annular portion, as well as the second mating annular portion and the third annular portion are connected by interference fit based on a first interference amount, and the first interference amount is 0.1-0.3 mm.

[0015] In some embodiments, the annular body is further provided with a sealing gasket end surface located on the inner wall of the annular body, and the sealing gasket end surface is connected to the first matching annular portion;

[0016] The end cover body is further provided with an end cover end face, the end cover end face is connected to the second annular portion, and the sealing gasket end face is connected to the end cover end face by interference fit.

[0017] In some embodiments, each of the annular inner arc surfaces and each of the annular outer arc surfaces has a clearance fit and / or an interference fit, and each of the stator end faces and each of the end cover end faces has a tight fit and / or a clearance fit.

[0018] In some embodiments, the stator end face includes a first matching end face and a second matching end face, and the first matching end face and the second matching end face are staggered in height direction;

[0019] The inner wall of the stator cavity also includes a first annular inner arc surface connected to the first matching end surface along the height direction and a second annular inner arc surface connected to the second matching end surface, and a third annular inner arc surface is formed between the first matching end surface and the second matching end surface.

[0020] In some embodiments, the annular outer arc surface includes a first annular outer arc surface corresponding to and matching the first annular inner arc surface, a second annular outer arc surface corresponding to and matching the second annular inner arc surface, and a third annular outer arc surface corresponding to and matching the third annular inner arc surface;

[0021] The end cover end surface includes: a third matching end surface corresponding to and matching the first matching end surface and a fourth matching end surface corresponding to and matching the second matching end surface.

[0022] In some embodiments, the first annular inner arc surface and the first annular outer arc surface, and the third annular inner arc surface and the third annular outer arc surface are clearance-matched;

[0023] The first matching end face and the third matching end face are tightly matched;

[0024] There is a clearance fit between the second matching end face and the fourth matching end face;

[0025] The second annular inner arc surface and the second annular outer arc surface are interference fit.

[0026] In some embodiments, the first annular inner arc surface and the first annular outer arc surface, as well as the third annular inner arc surface and the third annular outer arc surface are clearance-fitted based on a first fitting clearance interval, and the first fitting clearance interval is 0.02-0.1 mm.

[0027] In some embodiments, the second annular inner arc surface and the second annular outer arc surface are interference-fitted based on a second interference amount, and the second interference amount is 0.05-0.1 mm.

[0028] The embodiment of the present application provides a waterproof motor, which includes: a stator and a motor end cover, wherein the motor end cover is connected to the stator; the waterproof motor also includes: a sealing gasket, wherein the sealing gasket includes an annular body and a first annular portion arranged on the inner wall of the annular body, wherein a first protrusion is arranged on the first annular portion, and the first protrusion is used to be inserted between the stator and the motor end cover; the motor end cover includes an end cover body and a second annular portion arranged on the circumferential outer edge of the end cover body, wherein the first annular portion is matched and connected with the second annular portion; or, the stator includes a stator body and a stator cavity arranged in the stator body, wherein the inner wall of the stator cavity is smoothly connected by a plurality of first annular grooves with different radii and a plurality of stator end faces with different radii, wherein the first annular groove is spaced apart from the stator end face; the motor end cover includes an end cover body and an annular protrusion arranged on the circumferential outer edge of the end cover body and matched and connected with each first annular groove in a one-to-one manner, and an end cover end face correspondingly matched and connected with each stator end face, wherein the annular protrusion is smoothly connected with the end cover end face, and the annular protrusion is spaced apart from the end cover end face.

[0029] In this way, the embodiments of the present application introduce a sealing gasket waterproof structure or a labyrinth waterproof structure, a sealing gasket is arranged between the stator and the end cover, and a first protrusion is arranged on the sealing gasket to ensure a stable and sealed connection between the motor end cover and the sealing gasket and the stator. This method directly constructs the first line of defense on the potential water inlet path of the motor, effectively preventing the direct intrusion of water. Alternatively, a series of tortuous paths are formed by smoothly transitioning the connection between the first grooves of different radii on the stator and the end face of the stator, thereby forming a labyrinth waterproof structure, which can prevent water from penetrating into the interior of the motor based on the layers of blocking of the labyrinth structure, significantly enhancing the waterproof effect, thereby improving the waterproof performance of the motor from different levels, and effectively preventing moisture from directly or indirectly entering the interior of the motor. In addition, the waterproof structure of the waterproof motor in the embodiments of the present application is simple and has strong manufacturability, which improves the practicality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure in which the stator and the motor end cover of the motor are separated in the related art;

[0031] Figure 2 It is a cross-sectional schematic diagram of the connection between the stator and the motor end cover of the motor in the related art;

[0032] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0033] Figure 4 This is a schematic diagram of the connection structure of the motor end cover, the sealing gasket and the stator of the waterproof motor according to the embodiment of the present application;

[0034] Figure 5 for Figure 4 A cross-sectional diagram of a waterproof motor;

[0035] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0036] Figure 7 A schematic diagram of a structure in which a motor end cover, a sealing gasket and a stator of a waterproof motor according to an embodiment of the present application are separated;

[0037] Figure 8 It is another structural schematic diagram of the motor end cover, the sealing gasket and the stator of the waterproof motor of the embodiment of the present application being separated;

[0038] Fig. 9 for Figure 8 A cross-sectional schematic diagram of a waterproof motor;

[0039] Fig.10 for Fig. 9 A partial enlarged schematic diagram of point C in the middle;

[0040] Fig.11 This is a schematic diagram of the structure in which the stator and the motor end cover of the waterproof motor of the embodiment of the present application are separated;

[0041] Fig.12 for Fig.11 A cross-sectional schematic diagram of a waterproof motor;

[0042] Fig.13 for Fig.12 A local enlarged schematic diagram of point D in the middle.

[0043] Description of reference numerals:

[0044] 1. stator; 11. stator end face; 111. first matching end face; 112. second matching end face;

[0045] 12. annular inner arc surface; 121. first annular inner arc surface; 122. second annular inner arc surface;

[0046] 123. a third annular inner arc surface; 13. a third annular portion;

[0047] 2. Motor end cover; 21. Second annular portion; 211. Second protruding portion; 22. End surface of the end cover;

[0048] 221, third matching end surface; 222, fourth matching end surface; 23, annular outer arc surface;

[0049] 231, first annular outer arc surface; 232, second annular outer arc surface; 233, third annular outer arc surface;

[0050] 3. Sealing pad; 31. First annular portion; 311. First protruding portion; 312. Positioning hole;

[0051] 313. First matching annular portion; 314. Second matching annular portion; 32. Sealing gasket end face. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0053] In the description of the present application, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0054] In the description of the present application, the terms "first, second" and the like are only used to distinguish similar objects and do not represent a specific order of the objects. It is understandable that "first, second" and the like can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. Unless otherwise specified, "plurality" means at least two.

[0055] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0058] In the related art, for the motor, refer to Figure 1, the motor includes a stator 1 and a motor end cover 2, and the motor end cover 1 and the stator can be matched 2 for connection. The stator 1 is the core part of the motor, usually composed of an iron core and a winding. The iron core is made up of many thin sheets stacked together, and insulating paint is applied between these sheets to reduce eddy current losses. The winding is a wire wound around the iron core, which generates a magnetic field when current passes through it. The motor end cover 2 is a component used to protect the internal components of the motor and provide mechanical support. It can be made of metal or plastic and has a hole for installing a shaft or other accessories. In addition, the motor also includes a rotor, which consists of a central axis and a series of magnetic poles arranged around the axis. When current passes through the stator winding, a magnetic field is formed around the rotor, causing the rotor to start rotating.

[0059] In actual applications, when the power is turned on, the current passes through the winding in the stator 1, and according to the principle of electromagnetic induction, a rotating magnetic field is generated in the iron core of the stator 1. The direction and strength of this magnetic field change with the alternation of the current. The rotor located inside the stator 1 begins to rotate under the action of the rotating magnetic field generated by the stator. The conductor of the rotor cuts the magnetic lines of force, generating an induced current in the rotor conductor, which in turn generates a force that interacts with the magnetic field of the stator 1, pushing the rotor to rotate continuously. The rotational motion of the rotor is transmitted to the load through the motor shaft, realizing the conversion of electrical energy into mechanical energy.

[0060] In order to ensure the waterproof effect of the motor, the relevant technology adopts Figure 2 The waterproof structure shown, Figure 2 The end cover waterproof design is adopted. Figure 3 The enlarged view of the waterproof design of the end cap A is shown. Figure 2 and Figure 3 It can be seen that the motor end cover 2 and the stator 1 adopt an interference fit at the contact portion A3 and are tightly fitted at the contact portion A2. When rainwater penetrates from area A1, it can prevent rainwater from entering the motor. However, this structure has high requirements on process stability. If the component precision is not well controlled, the expected interference fit effect cannot be achieved.

[0061] Based on this, the embodiment of the present application provides a waterproof motor, which includes: a stator 1 and a motor end cover 2, and the motor end cover 2 is connected to the stator 1. The waterproof motor includes the following two types: the first is a waterproof motor based on a sealing gasket waterproof structure, such as Figure 4 As shown; the second is a waterproof motor based on a labyrinth waterproof structure, such as Fig.11 shown.

[0062] Please refer to Figure 4 The waterproof motor further comprises: a sealing pad 3, which is arranged between the stator 1 and the motor end cover 2. The sealing pad is usually made of elastic materials such as rubber and silica gel, and has good sealing performance. Figure 5A cross-sectional schematic diagram of the waterproof motor is shown. Figure 5 In the embodiment, the sealing gasket 3 is tightly filled in the small gap between the stator 1 and the motor end cover 2. Figure 5 At point B in the middle. Figure 6 is a local enlarged schematic diagram of point B. Figure 6 It can be seen that the sealing gasket 3 is tightly filled between the stator 1 and the motor end cover 2 to form a waterproof barrier, which can effectively prevent moisture and other pollutants from invading the interior of the motor even in a humid or underwater environment, protect key components such as the motor windings and bearings from damage, and ensure stable and safe operation of the motor.

[0063] Reference Figure 7 The sealing gasket 3 includes an annular body and a first annular portion 31 located on the inner wall of the annular body, a first protrusion 311 is provided on the first annular portion 31, and the first protrusion 311 is used to be inserted between the stator 1 and the motor end cover 2; the motor end cover 2 includes an end cover body and a second annular portion 21 located on the circumferential outer edge of the end cover body, and the first annular portion 31 is matched and connected with the second annular portion 21.

[0064] It should be noted that the sealing gasket 3 has an annular body, and a first annular portion 31 is designed on the inner wall of the annular body, and the first annular portion 31 is an arc surface. A first protruding portion 311 is further provided on the first annular portion 31, and the first protruding portion 311 can be a boss structure, and the boss can be an annular boss, which is intended to be inserted into the gap between the stator 1 and the motor end cover 2, and enhance the sealing effect by physical buckling.

[0065] It is understandable that a second annular portion 21 is provided on the circumferential outer edge of the end cover body. The second annular portion 21 is an arc surface that precisely matches the first annular portion 31 of the sealing gasket 3 to ensure that the two are firmly connected to form a reliable waterproof interface.

[0066] Thus, the embodiment of the present application introduces a sealing gasket waterproof structure, a sealing gasket 3 is arranged between the stator 1 and the end cover 2, and a first protrusion 311 is arranged on the sealing gasket 3 to ensure a stable and sealed connection between the motor end cover 2 and the sealing gasket 3 and the stator 1. This method directly constructs the first line of defense on the potential water inlet path of the motor, effectively preventing direct intrusion of water. In addition, the waterproof structure of the waterproof motor in the embodiment of the present application is simple and has strong manufacturability, which improves the practicality of the product.

[0067] In some embodiments, Figure 7 As shown, a positioning hole 312 is further provided on the first annular portion 31 , and a second protruding portion 211 is provided on the second annular portion 21 . The second protruding portion 211 is used to be inserted into the positioning hole 312 .

[0068] It can be understood that the number of the positioning holes 312 is one or more, and the positioning holes 312 arranged on the first annular portion 31 cooperate with the second protrusion 211 on the second annular portion 21 of the motor end cover. This design not only ensures the position accuracy of the sealing gasket 3 during installation, but also further enhances the connection stability between the sealing gasket 3 and the motor end cover 2, thereby preventing the sealing from failing due to vibration and other reasons during the operation of the motor.

[0069] In some embodiments, Figure 7 As shown, the first annular portion 31 is also provided with a first mating annular portion 313 and a second mating annular portion 314 arranged along the height direction. The first mating annular portion 313 is provided on the motor end cover 2 side and is matched and connected with the second annular portion 21 of the motor end cover 2. The second mating annular portion 314 is provided on the stator 1 side and is matched and connected with the third annular portion 13 provided on the inner wall of the stator cavity.

[0070] It can be understood that a first protruding portion 311 is provided between the first mating annular portion 313 and the second mating annular portion 314 for being inserted between the motor end cover 2 and the stator cavity.

[0071] It should be noted that a positioning hole 312 is provided on the first matching annular portion 313 , and the positioning hole 312 on the first matching annular portion matches with the second protruding portion 211 of the motor end cover 2 , which helps to accurately position during installation.

[0072] In some embodiments, an interference fit connection is adopted between the first matching annular portion 313 and the second annular portion 21, and between the second matching annular portion 314 and the third annular portion 13. The first interference is set between 0.1 and 0.3 mm. This can ensure the feasibility of the assembly process and avoid assembly difficulties or parts damage due to excessive assembly difficulty. At the same time, it can also ensure that there is enough pressure after assembly to keep the parts tightly combined, and it is not easy to loosen under long-term use, maintaining good waterproof performance.

[0073] In some embodiments, Figure 8 As shown, the annular body is also provided with a sealing gasket end face 32 located on the inner wall of the annular body, and the sealing gasket end face 32 is connected to the first matching annular portion 313; the end cover body is also provided with an end cover end face 22, and the end cover end face 22 is connected to the second annular portion 21, and the sealing gasket end face 32 and the end cover end face 22 are connected by interference fit.

[0074] also, Fig. 9 Shows Figure 8 The cross-sectional diagram of the waterproof motor, the matching between the sealing gasket, stator and motor end cover is shown in Fig. 9 As shown in C. Fig.10 A partial enlarged schematic diagram of C is shown, referring to Fig.10For the sealing gasket 3, the annular body not only includes a first annular portion 31 for being inserted between the stator 1 and the motor end cover 2, but also has a sealing gasket end face 32 directly connected to the first matching annular portion 313 arranged on its inner wall. The purpose of this design is to ensure that when the motor end cover 2 is installed in place, the end face 32 of the sealing gasket can form a close contact with the corresponding part of the end cover end face 22, further preventing moisture or other contaminants from entering the motor.

[0075] It is understandable that the design of the motor end cover 2 also takes this into consideration, and the end cover body is provided with an end cover end face 22 connected to the second annular portion 21. When the motor is assembled, the end cover end face 22 will be in contact with the sealing gasket end face 32, and the two are also connected by interference fit, ensuring the sealing effect of the motor on the axial end face.

[0076] The present application also provides a waterproof motor with a labyrinth waterproof structure, such as Fig.11 As shown, the stator 1 has a stator body, and the inner wall of the stator cavity in the positioning body is staggered along the height direction with at least two stator end faces 11 (not shown in the figure). This staggered design creates a series of annular inner arc surfaces 12, which are formed between adjacent stator end faces 11, increasing the difficulty of water penetration. The design of the motor end cover 2 matches the innovative structure of the stator 1. It not only has a basic end cover body, but also specially designed annular outer arc surfaces 23 that correspond one-to-one to the annular inner arc surface of the stator inner cavity, and an end cover end face 22 that is precisely docked with each stator end face 11. This design ensures that the motor end cover and the stator can fit perfectly in terms of both shape and position, further improving the waterproof performance.

[0077] Thus, the embodiment of the present application introduces a labyrinth waterproof structure, which forms a series of tortuous paths by smoothly transitioning and connecting the first grooves with different radii on the stator and the end face of the stator, thereby forming a labyrinth waterproof structure. The layered blocking of the labyrinth structure can prevent water from penetrating into the motor, significantly enhancing the waterproof effect, thereby improving the waterproof performance of the motor from different levels, and effectively preventing moisture from directly or indirectly entering the motor. In addition, the waterproof structure of the waterproof motor in the embodiment of the present application is simple, and the manufacturability is strong, which improves the practicality of the product.

[0078] In some embodiments, each annular inner arc surface 12 and each annular outer arc surface 23 have a clearance fit and / or an interference fit, and each stator end face 11 and each end cover end face 22 have a tight fit and / or a clearance fit.

[0079] It is understood that an interference fit is when the diameter of one part (usually the shaft) is slightly larger than the inner diameter of another part (usually the hole), and external force is required to force the shaft into the hole during assembly, thereby creating an interference between the two. This assembly method can achieve a keyless connection fixation, because the pressure generated by the interference can prevent the parts from sliding relative to each other, providing higher rotation accuracy and the ability to transmit torque. A tight fit, sometimes also called a transition fit, means that the dimensions of the hole and the shaft are designed to be very close, with either a slight interference or a slight gap, depending on the actual machining tolerance. This fit allows the parts to be assembled more easily without using additional force, while also providing a certain degree of fixation and stability. Tight fit is often used in situations where a certain degree of centering is required but it is not desired to completely restrict the relative movement of the parts. A clearance fit is when the size of the hole is larger than the size of the shaft, and there is a significant gap between the two. During assembly, the shaft can be easily inserted or withdrawn from the hole without external force. A clearance fit allows a certain degree of freedom between the parts, and is suitable for situations where the parts need to be able to slide relative to each other or adapt to expansion and contraction caused by temperature differences, such as bearing installation.

[0080] In some embodiments, Fig.11 as well as Fig.12 As shown, the stator end face 11 includes a first matching end face 111 and a second matching end face 112, and the first matching end face 111 and the second matching end face 112 are staggered in the height direction;

[0081] The inner wall of the stator cavity also includes a first annular inner arc surface 121 connected to the first matching end surface 111 along the height direction and a second annular inner arc surface 122 connected to the second matching end surface. A third annular inner arc surface 123 is formed between the first matching end surface 111 and the second matching end surface 112 .

[0082] In some embodiments, the annular outer arc surface 23 includes a first annular outer arc surface 231 corresponding to and matching the first annular inner arc surface 121 , a second annular outer arc surface 232 corresponding to and matching the second annular inner arc surface 122 , and a third annular outer arc surface 233 corresponding to and matching the third annular inner arc surface 123 ;

[0083] The end cover end surface 22 includes: a third matching end surface 221 corresponding to and matching with the first matching end surface 111 and a fourth matching end surface 222 corresponding to and matching with the second matching end surface 112 .

[0084] In some embodiments, Fig.11 and Fig.12 As shown, the first annular inner arc surface 121 and the first annular outer arc surface 231 as well as the third annular inner arc surface 123 and the third annular outer arc surface 233 are clearance-matched;

[0085] The first matching end surface 111 and the third matching end surface 221 are tightly matched;

[0086] The second matching end face 112 and the fourth matching end face 222 are clearance-fitted;

[0087] The second annular inner arc surface 122 and the second annular outer arc surface 232 are interference fit.

[0088] It is understandable that in Fig.13 In the figure, a partial enlarged view of the labyrinth structure at D is shown, based on which the specific details of the labyrinth seal can be seen. The labyrinth structure consists of five parts, namely Fig.13 The first labyrinth section D1, the second labyrinth section D2, the third labyrinth section D3, the fourth labyrinth section D4 and the fifth labyrinth section D5 shown together constitute a complex channel network, so that any gas or liquid trying to pass through here needs to pass through multiple obstacles to reach the destination. Among them, the first labyrinth section D1 (corresponding to the first annular inner arc surface 121 and the first annular outer arc surface 231) can be gap-matched, that is, a gap of 0.02 to 0.1 mm is retained between the first annular inner arc surface 121 and the first annular outer arc surface 231. Such a design not only allows the two components to move relative to each other, but also serves as a first-level labyrinth seal, increasing the difficulty of liquid or dust penetration through a tortuous path, and plays a preliminary protective role. The second labyrinth section D2 (corresponding to the tight fit between the first matching end face 111 and the third matching end face 221): Here is a close fit, which means that there is no gap between the first matching end face 111 of the stator and the third matching end face 221, forming a sealing surface, which serves as the first barrier to waterproofing and directly blocks the direct intrusion of water or other pollutants. The third labyrinth section D3 (clearance fit between the second matching end face 112 and the fourth matching end face 222): Similar to the first labyrinth section D1, it also adopts clearance fit, adding another level of tortuous path to enhance the waterproof effect. The fourth labyrinth section D4 (fit between the stator end face 112 and the end cover end face 222). The fifth labyrinth section D5 (interference fit between the second annular inner arc surface 122 and the second annular outer arc surface 232): This is an interference fit, which means that the outer arc of the end cover is slightly larger than the inner arc of the stator, and a certain amount of pressure needs to be applied during assembly to make it tightly combined.

[0089] On the whole, the maze-type fitting design of the embodiment of the present application combines multiple methods such as clearance fit, close fit and interference fit to form a complex and effective waterproof system, ensuring that the motor can still maintain good sealing and stability in harsh environments.

[0090] In some embodiments, the first annular inner arc surface 121 and the first annular outer arc surface 231 as well as the third annular inner arc surface 123 and the third annular outer arc surface 233 are clearance-fitted based on a first fitting clearance interval, and the first fitting clearance interval is 0.02-0.1 mm.

[0091] In some embodiments, the second annular inner arc surface 122 and the second annular outer arc surface 232 are interference-fitted based on a second interference amount, and the second interference amount is 0.05-0.1 mm. Here, the interference amount of 0.05-0.1 mm ensures an extremely tight seal, which is the last barrier to waterproofing and is crucial to preventing micro-leakage during long-term use.

[0092] The waterproof motor with the sealed waterproof structure and the waterproof motor with the labyrinth waterproof structure are described in detail below with reference to an application example. The above structure can solve the problem of outdoor air-conditioner motor protection and has a simple structure and strong manufacturability.

[0093] 1. Waterproof motor with sealed waterproof structure. It specifically includes two waterproof structures:

[0094] Structure 1: Refer to the above Figure 4 and Figure 7 A sealing gasket 3 is added to the surface of the waterproof motor, and the sealing gasket arc surfaces 313 and 314 are tightly fitted with the arc surface 21 of the end cover 2 and the arc surface 13 of the stator 1; the sealing gasket 3 has a boss 311 structure on the surface, which is tightly fitted with the gap between the end cover 2 and the stator 1; the sealing gasket 3 has a positioning hole 312 structure on the surface, which is positioned with the boss 21 on the end cover 2 to limit and fix the sealing gasket 3; the sealing gasket 3 has arc surfaces 313 and 314 that are interference fit with the arc surface 21 of the end cover 2 and the arc surface 13 of the stator 1, and the interference amount is 0.1 to 0.3 mm; the sealing gasket is made of rubber or other materials.

[0095] Structure 2: Reference Figure 8 , Fig. 9 and Fig.10 The waterproof motor has a sealing gasket 3 added to the motor surface, and the sealing gasket 3 has arc surfaces 313, 314, and an end surface 32 that are tightly fitted with the arc surface 21, the end surface 22, and the arc surface 13 of the stator 1; the sealing gasket 3 has a boss 311 structure on its surface that is tightly fitted with the end cover 2 and the stator 1 matching gap; the sealing gasket 3 has a positioning hole 312 structure on its surface that is positioned with the boss 211 on the end cover 2 to limit and fix the sealing gasket 1; the sealing gasket 3 has arc surfaces 313, 314, and an end surface 32 that are interference fit with the arc surface 21, the end surface 22, and the arc surface 13 of the end cover 2, and the interference amount is 0.1-0.3mm; the sealing gasket 1 is made of rubber or other materials.

[0096] 2. Waterproof motor with maze waterproof structure.

[0097] Reference Fig.11, Fig.12 and Fig.13 In this application example, a 5-layer maze protection structure is designed at the junction of the end cover 2 and the stator 1 to effectively solve the problem of motor waterproofing.

[0098] The inner arc 121 of the stator stop and the outer arc 231 of the end cover stop are clearance matched, and the clearance is 0.02~0.1 (corresponding to Fig.13 The first labyrinth section D1 in the stator end face 111 and the end cover end face 221 are tightly matched, which is the first waterproof barrier (corresponding to Fig.13 The second labyrinth section D2 in the stator stopper inner arc 123 and the end cover stopper outer arc 233 are clearance matched, and the clearance is 0.02 to 0.1 (corresponding to Fig.13 The third labyrinth segment D3); the stator end face 112 and the end cover end face 222 are clearance matched, and the clearance is 0.02 to 0.1 (corresponding to Fig.13 The fourth labyrinth segment D4); the inner arc 122 of the stator stop and the outer arc 232 of the end cover stop are interference fit, with a clearance of 0.05 to 0.1 (corresponding to Fig.13 The fifth maze section D5) is also the last barrier to waterproofing.

[0099] It should be noted that the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0100] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A waterproof motor, characterized in that: The waterproof motor comprises: a stator and a motor end cover, wherein the motor end cover is connected to the stator; The waterproof motor further comprises: a sealing gasket, the sealing gasket comprising an annular body and a first annular portion located on the inner wall of the annular body, a first protrusion being arranged on the first annular portion, the first protrusion being used to be inserted between the stator and the motor end cover; the motor end cover comprises an end cover body and a second annular portion located on the circumferential outer edge of the end cover body, the first annular portion being matched and connected with the second annular portion; or, The stator includes a stator body and a stator cavity located in the stator body, the inner wall of the stator cavity includes at least two stator end faces arranged in a staggered manner in the height direction, and an annular inner arc surface is formed between two adjacent stator end faces; the motor end cover includes an end cover body and an annular outer arc surface arranged on the circumferential outer edge of the end cover body and matched and connected with each of the annular inner arc surfaces in a one-to-one correspondence, and an end cover end face matched and connected with each of the stator end faces.

2. The waterproof motor according to claim 1, characterized in that: A positioning hole is also arranged on the first annular portion, and a second protruding portion is arranged on the second annular portion, and the second protruding portion is used for being inserted into the positioning hole.

3. The waterproof motor according to claim 2, characterized in that: The first annular portion is also provided with a first matching annular portion and a second matching annular portion arranged in a height direction, the first protruding portion is located between the first matching annular portion and the second matching annular portion, and the first matching annular portion is provided with the positioning hole; The stator comprises a stator body and a stator cavity located in the stator body, and a third annular portion is arranged on the inner wall of the stator cavity; Wherein, the first matching annular portion is matched and connected with the second annular portion, and the second matching annular portion is matched and connected with the third annular portion.

4. The waterproof motor according to claim 3, characterized in that: The first matching annular portion and the second annular portion, as well as the second matching annular portion and the third annular portion are connected by interference fit.

5. The waterproof motor according to claim 4, characterized in that: The first mating annular portion and the second annular portion, as well as the second mating annular portion and the third annular portion are connected by interference fit based on a first interference amount, and the first interference amount is 0.1-0.3 mm.

6. The waterproof motor according to claim 3, characterized in that: The annular body is also provided with a sealing gasket end surface located on the inner wall of the annular body, and the sealing gasket end surface is connected to the first matching annular portion; The end cover body is further provided with an end cover end face, the end cover end face is connected to the second annular portion, and the sealing gasket end face is connected to the end cover end face by interference fit.

7. The waterproof motor according to claim 1, characterized in that: There is a clearance fit and / or interference fit between each of the annular inner arc surfaces and each of the annular outer arc surfaces, and there is a tight fit and / or a clearance fit between each of the stator end faces and each of the end cover end faces.

8. The waterproof motor according to claim 7, characterized in that: The stator end face comprises a first matching end face and a second matching end face, and the first matching end face and the second matching end face are arranged staggered in the height direction; The inner wall of the stator cavity also includes a first annular inner arc surface connected to the first matching end surface along the height direction and a second annular inner arc surface connected to the second matching end surface, and a third annular inner arc surface is formed between the first matching end surface and the second matching end surface.

9. The waterproof motor according to claim 8, characterized in that: The annular outer arc surface includes a first annular outer arc surface corresponding to and matching the first annular inner arc surface, a second annular outer arc surface corresponding to and matching the second annular inner arc surface, and a third annular outer arc surface corresponding to and matching the third annular inner arc surface; The end cover end surface includes: a third matching end surface corresponding to and matching the first matching end surface and a fourth matching end surface corresponding to and matching the second matching end surface.

10. The waterproof motor according to claim 9, characterized in that: The first annular inner arc surface and the first annular outer arc surface, and the third annular inner arc surface and the third annular outer arc surface are clearance-matched; The first matching end face and the third matching end face are tightly matched; There is a clearance fit between the second matching end face and the fourth matching end face; The second annular inner arc surface and the second annular outer arc surface are interference fit.

11. The waterproof motor according to claim 10, characterized in that: The first annular inner arc surface and the first annular outer arc surface, as well as the third annular inner arc surface and the third annular outer arc surface, are clearance-fitted based on a first fitting clearance interval, and the first fitting clearance interval is 0.02-0.1 mm.

12. The waterproof motor according to claim 10, characterized in that: The second annular inner arc surface and the second annular outer arc surface are interference-fitted based on a second interference amount, and the second interference amount is 0.05-0.1 mm.

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