Motor and air conditioner

Abstract

The utility model discloses a motor and an air conditioner, the motor is used for the air conditioner, and the motor comprises a motor shaft; the motor shaft is sleeved with the bearing, the motor shaft is sleeved with the sealing piece, the sealing piece is located on one side, in the axial direction, of the bearing and abuts against the bearing, sealing teeth are arranged on the inner circumferential wall of the sealing piece, and the sealing teeth are in interference fit with the motor shaft. According to the motor provided by the utility model, the sealing element and the motor shaft are relatively fixed, the installation reliability and stability of the sealing element on the motor shaft are ensured, a waterproof effect can be achieved, the motor shaft does not need to be slotted, the integrity of the motor shaft is ensured, the structural strength of the motor shaft is ensured, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor and an air conditioner. Background Art

[0002] With the development of motors, higher requirements are put forward for the protection of motors, especially the waterproof performance of motors used outdoors. By setting a waterproof rubber ring on the motor shaft to improve the waterproof performance of the motor. At present, by grooving on the motor shaft, the installation of the waterproof rubber ring is realized. However, this installation method will increase the processing production cost of the motor shaft on the one hand and reduce the structural strength of the motor shaft on the other hand. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a motor, which ensures the integrity of the motor shaft, ensures the structural strength of the motor shaft, and reduces the production cost.

[0004] The utility model also provides an air conditioner, including the above-mentioned motor.

[0005] The motor according to the embodiment of the utility model is used for an air conditioner and includes: a motor shaft; a bearing sleeved on the motor shaft; a seal sleeved on the motor shaft, the seal is located on one side in the axial direction of the bearing and abuts against the bearing, and the inner peripheral wall of the seal has sealing teeth, and the sealing teeth are in interference fit with the motor shaft.

[0006] According to the motor of the embodiment of the utility model, the seal is located on one side in the axial direction of the bearing and abuts against the bearing, the inner peripheral wall of the seal has sealing teeth, and the sealing teeth are in interference fit with the motor shaft, so that the relative fixation of the seal and the motor shaft is realized, the installation reliability and stability of the seal on the motor shaft are ensured, and at the same time, the waterproof effect can be achieved. Moreover, there is no need to groove on the motor shaft, which ensures the integrity of the motor shaft, ensures the structural strength of the motor shaft, and reduces the production cost.

[0007] In some embodiments of the utility model, the sealing teeth are multiple and spaced apart along the axial direction of the motor shaft.

[0008] In some embodiments of the utility model, along the radial direction of the motor shaft, one end of the sealing tooth facing the motor shaft is a free end, and the end far from the motor shaft is a fixed end. In the direction from the fixed end to the free end of the sealing tooth, the width of the sealing tooth along the axial direction of the motor shaft remains unchanged or gradually decreases.

[0009] In some embodiments of the present invention, in the direction from the fixed end to the free end of the sealing tooth, the width of the sealing tooth along the axial direction of the motor shaft gradually decreases, the cross-section of the sealing tooth is trapezoidal, and in the direction from the fixed end to the free end of the sealing tooth, the two side walls of the sealing tooth along the axial direction of the motor shaft are inclined toward each other or one of them is inclined in the direction away from the bearing.

[0010] In some embodiments of the present invention, in the direction from the fixed end to the free end of the sealing tooth, the width of the sealing tooth along the axial direction of the motor shaft remains unchanged, and the cross-section of the sealing tooth is a rectangle or a parallelogram inclined away from the bearing direction.

[0011] In some embodiments of the present invention, the motor further includes a bearing cover, which is sleeved outside the bearing, and the bearing cover has an extension portion, which is located on one side of the axial direction of the bearing and sleeved outside the motor shaft, and at least part of the seal is located between the extension portion and the motor shaft.

[0012] In some embodiments of the utility model, along the axial direction of the motor shaft, the extension portion includes a first section and a second section connected in sequence, wherein one end of the first section facing away from the bearing is connected to the second section, and one end of the second section facing away from the first section extends in a direction away from the bearing and away from the motor shaft.

[0013] In some embodiments of the utility model, the seal includes: a main body portion, the main body portion is sleeved on the motor shaft, the sealing teeth are arranged on the inner circumferential wall of the main body portion, and at least a part of the main body portion is located between the extension portion and the motor shaft; a first stop portion, the first stop portion is sleeved outside the main body portion and is located at an end of the main body portion away from the bearing, and is used to block the gap between the main body portion and the extension portion in the axial direction of the motor shaft.

[0014] In some embodiments of the present invention, the seal also includes: a second stop portion, the second stop portion is annular, the radial inner end of the second stop portion is connected to the radial outer end of the first stop portion, the radial outer end of the second stop portion extends toward the bearing and away from the motor shaft, and at least a portion of the second stop portion is located radially outside the extension portion and is arranged opposite to the extension portion in the radial direction.

[0015] In some embodiments of the present invention, a protrusion is provided on the outer peripheral wall of the main body, and the protrusion extends in a ring shape along the circumferential direction of the main body.

[0016] In some embodiments of the present utility model, the protrusion includes a first protrusion and a second protrusion. The first protrusion is provided on the outer peripheral wall of the body portion and is annular extending along the circumferential direction of the body portion. The second protrusion is provided on the free end surface of the first protrusion and is annular extending along the circumferential direction of the body portion. The width of the first protrusion along the axial direction of the body portion is greater than the width of the second protrusion along the axial direction of the body portion.

[0017] The air conditioner according to an embodiment of the present utility model includes the above-mentioned motor.

[0018] The air conditioner according to an embodiment of the present utility model, by providing the above-mentioned motor, the seal is located on one side in the axial direction of the bearing and abuts against the bearing. The inner peripheral wall of the seal has seal teeth, and the seal teeth are in interference fit with the motor shaft, so that the relative fixation of the seal and the motor shaft is achieved, ensuring the installation reliability and stability of the seal on the motor shaft. At the same time, it can achieve the waterproof effect, and there is no need to groove on the motor shaft, ensuring the integrity of the motor shaft, ensuring the structural strength of the motor shaft, and reducing the production cost.

[0019] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] The above-mentioned and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0021] Figure 1 is a cross-sectional view of the motor according to Embodiment 1 of the present utility model;

[0022] Figure 2 is Figure 1 an enlarged view of part A in

[0023] Figure 3 is a cross-sectional view of the motor according to Embodiment 2 of the present utility model;

[0024] Figure 4 is Figure 3 an enlarged view of part B in

[0025] Figure 5 is a cross-sectional view of the motor according to Embodiment 3 of the present utility model;

[0026] Figure 6 is Figure 5 an enlarged view of part C in

[0027] Figure 7 is a cross-sectional view of the motor according to Embodiment 4 of the present utility model;

[0028] Figure 8 is Figure 7 an enlarged view of the D position in

[0029] Reference numerals:

[0030] 10. Motor;

[0031] 1. Seal; 11. Sealing teeth; 12. Body part; 13. First stop part; 14. Second stop part; 15. Protrusion; 151. First protrusion; 152. Second protrusion;

[0032] 20. Bearing;

[0033] 30. Bearing cover; 301. Extension part; 3011. First section; 3012. Second section;

[0034] 40. Motor shaft;

[0035] 50. Stator assembly;

[0036] 60. Rotor. Detailed implementation manners

[0037] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 the present invention can be understood according to specific circumstances.

[0040] The motor 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0041] like Figures 1 - 8 As shown, the motor 10 according to the embodiment of the utility model is used for an air conditioner and includes: a seal 1, a motor shaft 40 and a bearing 20.

[0042] Specifically, refer to Figures 1 - 8 The bearing 20 is sleeved on the motor shaft 40, and the seal 1 is sleeved on the motor shaft 40. The seal 1 is located on one side of the axial direction of the bearing 20 and stops against the bearing 20. The inner circumferential wall of the seal 1 has sealing teeth 11, which extend along the circumferential direction of the motor shaft 40. The sealing teeth 11 are interference fit with the motor shaft 40.

[0043] It should be noted that the bearings 20 are two spaced apart along the axis direction of the motor shaft 40, and the two bearings 20 are both sleeved on the motor shaft 40, thereby achieving smooth rotation of the motor shaft 40. The motor 10 also includes a stator assembly 50, which is sleeved on the motor shaft 40 and arranged between the two bearings 20. The seal 1 is arranged on the side of one of the bearings 20 away from the stator assembly 50. The setting of the seal 1 can prevent water from entering the gap between the bearing 20 and the motor shaft 40 along the axis direction of the motor shaft 40, which can not only protect the bearing 20, but also prevent water from entering the stator assembly 50, thereby playing a waterproof role.

[0044] It can be understood that the sealing teeth 11 protrude toward the motor shaft 40, and the sealing teeth 11 are interference fit with the motor shaft 40, so that the seal 1 and the motor shaft 40 are relatively fixed, thereby ensuring the installation reliability and stability of the seal 1 on the motor shaft 40, and at the same time having a waterproof effect, and there is no need to groove the motor shaft 40, thereby ensuring the integrity of the motor shaft 40, ensuring the structural strength of the motor shaft 40, and reducing the production cost.

[0045] In addition, the seal 1 and the bearing 20 abut against each other, thereby playing a limiting and positioning role for the seal 1 , thereby further improving the installation reliability and stability of the seal 1 on the motor shaft 40 .

[0046] Further, as Figures 1 - 8 shown, the motor 10 further includes a rotor 60 sleeved on the motor shaft 40, and a stator assembly 50 sleeved outside the rotor 60. When the coil of the stator assembly 50 is energized to generate a rotating magnetic field, the rotor 60 will be affected by the magnetic field and start to rotate, thereby driving the motor shaft 40 to rotate to convert electrical energy into mechanical energy. At the same time, the motor shaft 40 is supported by the bearing 20 to reduce the friction and wear during the rotation of the motor shaft 40, and improve the efficiency and service life of the motor 10.

[0047] According to the motor 10 of the embodiment of the present invention, the seal 1 is located on one side in the axial direction of the bearing 20 and abuts against the bearing 20. The inner peripheral wall of the seal 1 has sealing teeth 11, and the sealing teeth 11 are in interference fit with the motor shaft 40, so that the relative fixation of the seal 1 and the motor shaft 40 is ensured, the installation reliability and stability of the seal 1 on the motor shaft 40 are ensured, and at the same time, the waterproof effect can be achieved, and there is no need to groove the motor shaft 40, which ensures the integrity of the motor shaft 40, ensures the structural strength of the motor shaft 40, and reduces the production cost.

[0048] In some embodiments of the present invention, as Figures 1 - 8 shown, the sealing teeth 11 are multiple and spaced apart along the axial direction of the motor shaft 40. Thus, the fixing effect of the seal 1 on the motor shaft 40 is further improved, the installation reliability and stability of the seal 1 on the motor shaft 40 are ensured, and at the same time, the waterproof sealing effect is further improved.

[0049] Among them, for example, in the example shown in Figures 1 - 8 , the sealing teeth 11 are 7 and spaced apart along the axial direction of the motor shaft 40, but the present invention is not limited thereto, and the sealing teeth 11 can also be other numbers, such as 3, 4, 8 or 10, etc.

[0050] In some embodiments of the present invention, as Figure 5 and Figure 6 shown, along the radial direction of the motor shaft 40, one end of the sealing tooth 11 facing the motor shaft 40 is a free end, and the end far from the motor shaft 40 is a fixed end. In the direction from the fixed end to the free end of the sealing tooth 11, the width of the sealing tooth 11 along the axial direction of the motor shaft 40 remains unchanged. Thus, it is ensured that the force generated by the deformation of the sealing tooth 11 is large enough, thereby improving the connection and installation reliability between the sealing tooth 11 and the motor shaft 40, and at the same time, the waterproof sealing efficiency is further improved.

[0051] Or, as Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, in the direction from the fixed end to the free end of the sealing tooth 11, the width of the sealing tooth 11 in the axial direction of the motor shaft 40 gradually decreases. Thus, in the direction from the fixed end to the free end of the sealing tooth 11, the degree of deformability of the sealing tooth 11 gradually increases, facilitating the assembly of the sealing tooth 11 and the motor shaft 40 and improving the assembly efficiency.

[0052] In some embodiments of the present utility model, as Figure 3 , Figure 4 , Figure 7 and Figure 8 shown, in the direction from the fixed end to the free end of the sealing tooth 11, the width of the sealing tooth 11 in the axial direction of the motor shaft 40 gradually decreases, the cross-section of the sealing tooth 11 is trapezoidal, and in the direction from the fixed end to the free end of the sealing tooth 11, the two side walls of the sealing tooth 11 in the axial direction of the motor shaft 40 are inclined towards each other or one of them is inclined in the direction away from the bearing 20. For example, in the examples shown in Figure 3 and Figure 4 , the two side walls of the sealing tooth 11 in the axial direction of the motor shaft 40 are inclined towards each other. For example, in the examples shown in Figure 7 and Figure 8 , one of the side walls of the sealing tooth 11 in the axial direction of the motor shaft 40 close to the bearing 20 is inclined in the direction away from the bearing 20.

[0053] Thus, in the direction from the fixed end to the free end of the sealing tooth 11, the degree of deformability of the sealing tooth 11 gradually increases, facilitating the assembly of the sealing tooth 11 and the motor shaft 40 and improving the assembly efficiency. Among them, one of the two side walls of the sealing tooth 11 in the axial direction of the motor shaft 40 is inclined in the direction away from the bearing 20, so that the water can be further blocked, and the waterproof sealing effect is further improved.

[0054] In some embodiments of the present utility model, as Figure 1 , Figure 2 , Figure 5 and Figure 6 shown, in the direction from the fixed end to the free end of the sealing tooth 11, the width of the sealing tooth 11 in the axial direction of the motor shaft 40 remains unchanged, and the cross-section of the sealing tooth 11 is rectangular or a parallelogram inclined in the direction away from the bearing 20.

[0055] It can be understood that, as Figure 5 and Figure 6 shown, the cross-section of the sealing tooth 11 is rectangular, making the structure of the sealing tooth 11 more regular, facilitating the production and manufacturing of the sealing member 1 and improving the production efficiency. As Figure 1 and Figure 2As shown, the cross-section of the sealing tooth 11 is a parallelogram inclined towards the direction away from the bearing 20, thereby further blocking water and further improving the waterproof sealing effect. Among them, the cross-section of the sealing tooth 11 refers to the plane where the axis of the sealing tooth 11 is located.

[0056] In some embodiments of the present invention, there are multiple sealing teeth 11 spaced apart along the axial direction of the motor shaft 40. Among the multiple sealing teeth 11, all the sealing teeth 11 may have a gradually decreasing width along the axial direction of the motor shaft 40 from the fixed end to the free end of the sealing tooth 11. Or all of them may have a constant width along the axial direction of the motor shaft 40 from the fixed end to the free end of the sealing tooth 11. Or some may have a gradually decreasing width along the axial direction of the motor shaft 40 from the fixed end to the free end of the sealing tooth 11, and some may have a constant width along the axial direction of the motor shaft 40 from the fixed end to the free end of the sealing tooth 11.

[0057] In some embodiments of the present invention, as Figures 1 - 8 shown, the motor 10 further includes a bearing cover 30. The bearing cover 30 is sleeved outside the bearing 20. The bearing cover 30 has an extension 301. The extension 301 is located on one side in the axial direction of the bearing 20 and is sleeved outside the motor shaft 40. At least part of the seal 1 is located between the extension 301 and the motor shaft 40.

[0058] Among them, it should be noted that the bearing cover 30 is used to fix the bearing 20 to ensure that the bearing 20 is in the correct position, so that the parts on the motor shaft 40 can be effectively supported to ensure its normal operation. The bearing cover 30 can also prevent dust, water and other foreign objects from entering the raceway of the bearing 20, thereby playing a role in maintaining the cleanliness of the bearing 20 and extending its service life.

[0059] It can be understood that at least part of the seal 1 is located between the extension 301 and the motor shaft 40, so as to block dust, water and other foreign objects from entering the raceway of the bearing 20 through the gap between the extension 301 and the motor shaft 40 and entering the interior of the motor 10, thereby further improving the waterproof sealing performance. Among them, there may be a dynamic seal 1 between the seal 1 and the inner peripheral wall of the extension 301 or there is a gap between the seal 1 and the inner peripheral wall of the extension 301, so as to avoid movement interference between the seal 1 and the bearing cover 30 when the seal 1 rotates with the motor shaft 40.

[0060] In some embodiments of the present invention, as Figures 1 - 8As shown, along the axial direction of the motor shaft 40, the extension portion 301 includes a first section 3011 and a second section 3012 that are sequentially connected. One end of the first section 3011 facing away from the bearing 20 is connected to the second section 3012, and one end of the second section 3012 facing away from the first section 3011 extends in a direction away from the bearing 20 and away from the motor shaft 40.

[0061] Thus, when liquid enters between the body portion 12 and the extension portion 301, due to the fact that one end of the second section 3012 facing away from the first section 3011 extends in a direction away from the bearing 20 and away from the motor shaft 40, the second section 3012 plays a certain role in guiding the flow of the liquid, so that the liquid entering between the body portion 12 and the extension portion 301 can flow out along the outer surface of the second section 3012, thereby realizing the water drainage function of the motor 10, effectively avoiding the damage caused by liquid accumulation, and further maintaining the normal operation of the motor 10 and extending its service life.

[0062] In some embodiments of the present utility model, as Figures 1 - 8 shown, the seal 1 includes: a body portion 12 and a first stop portion 13. The body portion 12 is sleeved on the motor shaft 40, the sealing teeth 11 are provided on the inner peripheral wall of the body portion 12, and at least a part of the body portion 12 is located between the extension portion 301 and the motor shaft 40; the first stop portion 13 is sleeved outside the body portion 12 and is located at one end of the body portion 12 facing away from the bearing 20, and is used to block the gap between the body portion 12 and the extension portion 301 in the axial direction of the motor shaft 40. It should be noted that the first stop portion 13 and the body portion 12 are connected to each other and are an integral part.

[0063] It can be understood that at least a part of the body portion 12 is located between the extension portion 301 and the motor shaft 40, so as to block dust, water and other foreign objects from entering the raceway of the bearing 20 through the gap between the extension portion 301 and the motor shaft 40 and entering the interior of the motor 10, thereby further improving the waterproof and sealing performance. The arrangement of the first stop portion 13 can block dust, water and other foreign objects from entering the raceway of the bearing 20 through the gap between the body portion 12 and the extension portion 301 and entering the interior of the motor 10, thereby further improving the waterproof and sealing performance.

[0064] In some embodiments of the present utility model, as Figures 1 - 8 shown, the seal 1 further includes: a second stop portion 14. The second stop portion 14 is annular. The radially inner end of the second stop portion 14 is connected to the radially outer end of the first stop portion 13. The radially outer end of the second stop portion 14 faces the bearing 20 and extends in a direction away from the motor shaft 40, that is, the second stop portion 14 is formed in a horn shape with the opening facing the bearing 20, and at least a part of the second stop portion 14 is located radially outside the extension portion 301 and is arranged opposite to the extension portion 301 in the radial direction.

[0065] It can be understood that by providing the second stopper portion 14, dust, water, and other foreign matters can be blocked from entering the gap between the main body portion 12 and the extension portion 301, thereby further improving the waterproof and airtight performance. In addition, since the radially outer end of the second stopper portion 14 faces the bearing 20 and extends in a direction away from the motor shaft 40, when dust, water, and other foreign matters fall on the second stopper portion 14, they can flow along the second stopper portion 14 away from the bearing 20, thereby realizing the water drainage function, effectively avoiding the damage caused by liquid accumulation, and further maintaining the normal operation of the motor 10 and extending its service life.

[0066] In some embodiments of the present utility model, as Figures 1 - 8 shown, a protrusion 15 is provided on the outer peripheral wall of the main body portion 12, and the protrusion 15 extends circumferentially along the main body portion 12 to form a ring. It can be understood that the provision of the protrusion 15 further reduces the gap between the main body portion 12 and the extension portion 301, thereby further blocking dust, water, and other foreign matters from entering the raceway of the bearing 20 and the interior of the motor 10 through the gap between the main body portion 12 and the extension portion 301, thereby further improving the waterproof and airtight performance.

[0067] In some embodiments of the present utility model, as Figures 1 - 8 shown, the protrusion 15 includes a first protrusion 151 and a second protrusion 152. The first protrusion 151 is provided on the outer peripheral wall of the main body portion 12 and extends circumferentially along the main body portion 12 to form a ring. The second protrusion 152 is provided on the free end surface of the first protrusion 151 and extends circumferentially along the main body portion 12 to form a ring. The width of the first protrusion 151 in the axial direction of the main body portion 12 is smaller than the width of the second protrusion 152 in the axial direction of the main body portion 12.

[0068] It can be understood that the interaction between the first protrusion 151 and the second protrusion 152 further reduces the gap between the main body portion 12 and the extension portion 301, thereby further blocking dust, water, and other foreign matters from entering the raceway of the bearing 20 and the interior of the motor 10 through the gap between the main body portion 12 and the extension portion 301, thereby further improving the waterproof and airtight performance.

[0069] Furthermore, as Figures 1 - 8 shown, in the axial direction of the motor shaft 40, the extension portion 301 includes a first section 3011 and a second section 3012 connected in sequence. One end of the first section 3011 away from the bearing 20 is connected to the second section 3012, and one end of the second section 3012 away from the first section 3011 extends in a direction away from the bearing 20 and away from the motor shaft 40.

[0070] The inner diameter of the first section 3011 remains unchanged along the axial direction of the motor shaft 40. The first protrusion 151 is located on the side of the second protrusion 152 closer to the bearing 20. The end of the first protrusion 151 facing away from the motor shaft 40 extends beyond the end of the second protrusion 152 facing away from the motor shaft 40. Along the radial direction of the motor shaft 40, the first protrusion 151 faces the first section 3011, and at least part of the second protrusion 152 faces the second section 3012.

[0071] It can be understood that the liquid entering between the main body portion 12 and the extension portion 301 passes through the second protrusion 152 and the first protrusion 151 in sequence. Since the end of the first protrusion 151 facing away from the motor shaft 40 extends beyond the end of the second protrusion 152 facing away from the motor shaft 40, the second protrusion 152 and the first protrusion 151 block the liquid in sequence, effectively preventing the liquid from entering the bearing 20 or the interior of the motor 10.

[0072] At the same time, since one end of the second section 3012 facing away from the first section 3011 extends in a direction away from the bearing 20 and away from the motor shaft 40, and at least part of the second protrusion 152 faces the second section 3012, the distance between the second section 3012 and the second protrusion 152 gradually decreases in the direction from the second protrusion 152 to the first protrusion 151. And because the inner diameter of the first section 3011 remains unchanged along the axial direction of the motor shaft 40, and the first protrusion 151 faces the first section 3011, the distance between the first section 3011 and the first protrusion 151 remains unchanged in the direction from the second protrusion 152 to the first protrusion 151, enabling the first protrusion 151 to further prevent the liquid from entering the bearing 20 or the interior of the motor 10 and improving the waterproof effect.

[0073] In some embodiments of the present utility model, the first protrusion 151 is in clearance fit or dynamic seal contact with the first section 3011. It can be understood that, as Figures 1 - 8 shown, the first protrusion 151 is in clearance fit with the first section 3011. Thus, through such a setting, while preventing the liquid from entering the bearing 20 or the interior of the motor 10, the liquid located on the side of the first protrusion 151 facing away from the second protrusion 152 can also be discharged from between the first protrusion 151 and the first section 3011; or, the first protrusion 151 is in dynamic seal contact with the first section 3011. It can be understood that the seal 1 rotates with the motor shaft 40, and the fixed part of the bearing cover 30 does not move. Through the dynamic seal contact between the first protrusion 151 and the first section 3011, while ensuring the relative movement of the seal 1 and the bearing cover 30, the liquid is completely blocked from entering the bearing 20 or the interior of the motor 10 between the first protrusion 151 and the first section 3011.

[0074] In some embodiments of the present utility model, as Figures 1 - 8As shown in the figure, in the direction from the first protrusion 151 to the second protrusion 152, the side wall surface of the second protrusion 152 facing away from the first protrusion 151 is inclined towards the motor shaft 40. Thus, after the liquid entering between the main body portion 12 and the extension portion 301 is blocked by the second protrusion 152, it can flow towards the lower part along this inclined side wall surface, realizing the water drainage function, effectively reducing the liquid staying between the protrusion 14 and the extension portion 301. And in cooperation with the end of the second section 3012 facing away from the first section 3011 extending towards the direction away from the bearing 20 and away from the motor shaft 40, it can further discharge the liquid between the main body portion 12 and the extension portion 301, ensuring the water drainage effect.

[0075] Optionally, in the projection in the radial direction of the motor shaft 40, the side wall surface of the second protrusion 152 facing away from the first protrusion 151 extends beyond the extension portion 301.

[0076] In some embodiments of the present utility model, as Figures 1 - 8 shown, in the cross-section parallel to the axial direction of the motor shaft 40 and passing through the central axis of the motor shaft 40, the free end surface of the first protrusion 151 is formed as a cylindrical surface. It can be understood that in the cross-section parallel to the axial direction of the motor shaft 40 and passing through the central axis of the motor shaft 40, the free end surface of the first protrusion 151 and the end surface of the first section 3011 facing the motor shaft 40 are opposite to each other. By forming the free end surface of the first protrusion 151 as a cylindrical surface, the distance between the first section 3011 and the first protrusion 151 remains unchanged, so that the first protrusion 151 further blocks the liquid from entering the bearing 20 or the interior of the motor 10, improving the waterproof effect. And the setting of the cylindrical surface can reduce the concentrated impact of the liquid on a certain area, improving the overall reliability.

[0077] In some embodiments of the present utility model, as Figures 1 - 8 shown, in the direction from the first protrusion 151 to the second protrusion 152, the side wall surface of the first protrusion 151 close to the second protrusion 152 is inclined towards the motor shaft 40. Thus, after the liquid entering between the main body portion 12 and the extension portion 301 is blocked by the first protrusion 151, it can flow towards the first protrusion 151 along this inclined side wall surface, realizing the water drainage function and reducing the liquid staying between the first protrusion 151 and the extension portion 301.

[0078] Furthermore, in the direction from the first protrusion 151 to the second protrusion 152, the side wall surface of the second protrusion 152 facing away from the first protrusion 151 is inclined towards the motor shaft 40. Thus, the liquid blocked by the first protrusion 151 flows towards the first protrusion 151 along the side wall surface of the first protrusion 151 close to the second protrusion 152, and flows towards the lower point along the side wall surface of the first protrusion 151 close to the second protrusion 152, realizing double water drainage and further reducing the liquid retention.

[0079] The following describes Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4 of the specific embodiments of the present invention. It should be understood that the following description is only exemplary and is intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0080] Embodiment 1:

[0081] As Figure 5 and Figure 6 shown, the motor 10 according to an embodiment of the present invention includes: a seal 1, a motor shaft 40, and a bearing 20.

[0082] Further, as Figure 5 and Figure 6 shown, the motor 10 is for an air conditioner. The bearing 20 is sleeved on the motor shaft 40, the seal 1 is sleeved on the motor shaft 40, the seal 1 is located on one side in the axial direction of the bearing 20 and abuts against the bearing 20. The inner peripheral wall of the seal 1 has sealing teeth 11, and the sealing teeth 11 are in interference fit with the motor shaft 40. There are 7 sealing teeth 11 spaced apart along the axial direction of the motor shaft 40. Along the radial direction of the motor shaft 40, one end of the sealing tooth 11 facing the motor shaft 40 is a fixed end, and the end away from the motor shaft 40 is a free end. In the direction from the fixed end to the free end of the sealing tooth 11, the width of the sealing tooth 11 along the axial direction of the motor shaft 40 remains unchanged, and the cross-section of the sealing tooth 11 is rectangular.

[0083] Thus, the relative fixation of the seal 1 and the motor shaft 40 is achieved, ensuring the installation reliability and stability of the seal 1 on the motor shaft 40. At the same time, it can achieve a waterproof effect, and there is no need to groove on the motor shaft 40, ensuring the integrity of the motor shaft 40, ensuring the structural strength of the motor shaft 40, and reducing the production cost.

[0084] Further, as Figure 5 and Figure 6As shown, the seal 1 includes: a body 12, a first stopper 13 and a second stopper 14. The motor 10 also includes a bearing cover 30, which is sleeved outside the bearing 20. The bearing cover 30 has an extension portion 301, which is located on one side of the axial direction of the bearing 20 and sleeved outside the motor shaft 40. At least part of the seal 1 is located between the extension portion 301 and the motor shaft 40. The body 12 is sleeved on the motor shaft 40, and the sealing teeth 11 are provided on the inner circumferential wall of the body 12. At least part of the body 12 is located between the extension portion 301 and the motor shaft 40. The first stopper 13 is sleeved outside the body 12 and is located at one end of the body 12 away from the bearing 20, and is used to cover the gap between the body 12 and the extension portion 301 in the axial direction of the motor shaft 40. The second stop portion 14 is annular, and the radial inner end of the second stop portion 14 is connected to the radial outer end of the first stop portion 13. The radial outer end of the second stop portion 14 extends toward the bearing 20 and away from the motor shaft 40. At least a portion of the second stop portion 14 is located radially outside the extension portion 301 and is arranged opposite to the extension portion 301 in the radial direction.

[0085] Thus, dust, water and other foreign matter can be prevented from entering the raceway of the bearing 20 through the gap between the main body 12 and the extension portion 301 and entering the interior of the motor 10, thereby further improving the waterproof sealing performance.

[0086] Furthermore, if Figure 5 and Figure 6 As shown, along the axial direction of the motor shaft 40, the extension portion 301 includes a first section 3011 and a second section 3012 connected in sequence, the end of the first section 3011 away from the bearing 20 is connected to the second section 3012, and the end of the second section 3012 away from the first section 3011 extends toward the direction away from the bearing 20 and away from the motor shaft 40.

[0087] Furthermore, if Figure 5 and Figure 6 As shown, a protrusion 15 is provided on the outer peripheral wall of the body part 12, and the protrusion 15 extends in a ring shape along the circumferential direction of the body part 12. The protrusion 15 includes a first protrusion 151 and a second protrusion 152, the first protrusion 151 is provided on the outer peripheral wall of the body part 12 and is in a ring shape extending in the circumferential direction of the body part 12, the second protrusion 152 is provided on the free end surface of the first protrusion 151 and is in a ring shape extending in the circumferential direction of the body part 12, and the width of the first protrusion 151 along the axial direction of the body part 12 is smaller than the width of the second protrusion 152 along the axial direction of the body part 12.

[0088] As a result, the gap between the main body portion 12 and the extension portion 301 is further reduced, thereby further preventing dust, water, and other foreign objects from entering the raceway of the bearing 20 and the interior of the motor 10 through the gap between the main body portion 12 and the extension portion 301, thus further improving the waterproof and dustproof sealing performance.

[0089] Embodiment 2:

[0090] As Figure 1 and Figure 2 shown, the structures of Embodiment 1 and Embodiment 2 are substantially the same, where the same structures are denoted by the same reference numerals in the drawings. The difference lies only in that in the direction from the fixed end to the free end of the sealing tooth 11, the width of the sealing tooth 11 in the axial direction of the motor shaft 40 remains unchanged, and the cross-section of the sealing tooth 11 is a parallelogram inclined in the direction away from the bearing 20.

[0091] Embodiment 3:

[0092] As Figure 3 and Figure 4 shown, the structures of Embodiment 3 and Embodiment 1 are substantially the same, where the same structures are denoted by the same reference numerals in the drawings. The difference lies only in that in the direction from the fixed end to the free end of the sealing tooth 11, the width of the sealing tooth 11 in the axial direction of the motor shaft 40 gradually decreases, the cross-section of the sealing tooth 11 is a trapezoid, and in the direction from the fixed end to the free end of the sealing tooth 11, the two side walls of the sealing tooth 11 in the axial direction of the motor shaft 40 are inclined towards each other.

[0093] Embodiment 4:

[0094] As Figure 7 and Figure 8 shown, the structures of Embodiment 4 and Embodiment 3 are substantially the same, where the same structures are denoted by the same reference numerals in the drawings. The difference lies only in that in the direction from the fixed end to the free end of the sealing tooth 11, one of the two side walls of the sealing tooth 11 in the axial direction of the motor shaft 40 is inclined in the direction away from the bearing 20.

[0095] Next, an air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0096] As Figures 1 - 8 shown, the air conditioner according to an embodiment of the present invention includes the above-mentioned motor 10.

[0097] According to the motor 10 of the embodiment of the present utility model, by providing the above-mentioned motor 10, the seal 1 is located on one side in the axial direction of the bearing 20 and abuts against the bearing 20. The inner peripheral wall of the seal 1 has sealing teeth 11, and the sealing teeth 11 are in interference fit with the motor shaft 40, so that the relative fixation between the seal 1 and the motor shaft 40 is ensured, the installation reliability and stability of the seal 1 on the motor shaft 40 are guaranteed, and at the same time, the waterproof effect can be achieved. Moreover, there is no need to groove on the motor shaft 40, which ensures the integrity of the motor shaft 40, guarantees the structural strength of the motor shaft 40, and reduces the production cost.

[0098] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0099] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that, For an air conditioner and comprising: A motor shaft; A bearing sleeved on the motor shaft, A seal sleeved on the motor shaft, the seal being located on one side in the axial direction of the bearing and abutting against the bearing, and having sealing teeth on the inner peripheral wall thereof, the sealing teeth being in interference fit with the motor shaft.

2. The motor according to claim 1, characterized in that, The sealing teeth are multiple and spaced apart along the axial direction of the motor shaft.

3. The motor according to claim 1, wherein In the radial direction of the motor shaft, one end of the sealing tooth facing the motor shaft is a free end, and the end away from the motor shaft is a fixed end. In the direction from the fixed end to the free end of the sealing tooth, the width of the sealing tooth in the axial direction of the motor shaft remains unchanged or gradually decreases.

4. The motor according to claim 3, characterized in that, In the direction from the fixed end to the free end of the sealing tooth, the width of the sealing tooth in the axial direction of the motor shaft gradually decreases, and the cross-section of the sealing tooth is trapezoidal. In the direction from the fixed end to the free end of the sealing tooth, the two side walls of the sealing tooth in the axial direction of the motor shaft are inclined towards each other or one of them is inclined in the direction away from the bearing.

5. The motor according to claim 3, characterized in that, In the direction from the fixed end to the free end of the sealing tooth, the width of the sealing tooth in the axial direction of the motor shaft remains unchanged, and the cross-section of the sealing tooth is rectangular or a parallelogram inclined in the direction away from the bearing.

6. The motor according to claim 1, wherein The motor further includes a bearing cover sleeved outside the bearing, the bearing cover having an extension portion located on one side in the axial direction of the bearing and sleeved outside the motor shaft, and at least part of the seal being located between the extension portion and the motor shaft.

7. The motor according to claim 6, wherein In the axial direction of the motor shaft, the extension portion includes a first section and a second section connected in sequence. One end of the first section away from the bearing is connected to the second section, and one end of the second section away from the first section extends in the direction away from the bearing and away from the motor shaft.

8. The motor according to claim 6, characterized in that The seal includes: A body portion sleeved on the motor shaft, the sealing teeth being provided on the inner peripheral wall of the body portion, and at least part of the body portion being located between the extension portion and the motor shaft; A first stop portion sleeved outside the body portion and located at one end of the body portion away from the bearing, for blocking the gap between the body portion and the extension portion in the axial direction of the motor shaft.

9. The motor according to claim 8, characterized in that, The seal further includes: A second stop portion which is annular, the radially inner end of the second stop portion being connected to the radially outer end of the first stop portion, the radially outer end of the second stop portion facing the bearing and extending in the direction away from the motor shaft, and at least part of the second stop portion being located radially outside the extension portion and being oppositely arranged with the extension portion in the radial direction.

10. The motor according to claim 8, characterized in that, A protrusion is provided on the outer peripheral wall of the body portion, and the protrusion extends in a circumferential direction of the body portion to form an annular shape.

11. The motor according to claim 10, characterized in that, The protrusions include a first protrusion and a second protrusion. The first protrusion is provided on the outer peripheral wall of the body portion and is an annular shape extending along the circumferential direction of the body portion. The second protrusion is provided on the free end surface of the first protrusion and is an annular shape extending along the circumferential direction of the body portion. The width of the first protrusion in the axial direction of the body portion is greater than the width of the second protrusion in the axial direction of the body portion.

12. An air conditioner, characterized in that, Comprising an electric machine according to any one of claims 1-11.

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