Outer rotor motor and refrigeration equipment
By designing a bent casing periphery in the outer rotor motor to form a waterproof groove, the problem of insufficient waterproofing ability of traditional outer rotor motors is solved, and higher waterproof and protective effects are achieved, extending the service life of the motor.
Patent Information
- Application Number
- CN202311747304.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2025-06-20
AI Technical Summary
Traditional external rotor motors have weak waterproofing capabilities and are prone to water intake during outdoor use, resulting in rust and motor failure in internal metal parts.
An outer rotor motor is designed, using a bent casing peripheral edge to form a waterproof groove and is connected to the periphery of the stator end cover. The notch of the waterproof groove faces the front end of the rotating shaft, and the edge of the casing extends into the waterproof groove to prevent the entry of water vapor and dirt.
It effectively reduces the water vapor entering the outer rotor motor, improves waterproofing ability, and blocks the entry of some dirty things, extends the service life of the motor.
Smart Images
Figure CN120185267A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of motor structures, and particularly to an outer rotor motor and a refrigeration device. Background Art
[0002] In current traditional outer rotor motors, a gap needs to be left between the stator and the rotor for heat dissipation and to meet relative rotation. The rotor is located on the outside and is a rotating part. Generally, a waterproof structure needs to be provided. The waterproof ability of common outer rotor motors is weak. Since outer rotor motors are often used outdoors, there is a risk of water ingress when the outer rotor motor is used outdoors. External water or humid air easily enters the interior of the outer rotor motor, causing the internal metal components to rust and leading to motor failure. Summary of the Invention
[0003] The main object of the present invention is to provide an outer rotor motor, aiming to enhance the waterproof ability of the outer rotor motor.
[0004] To achieve the above object, the outer rotor motor proposed by the present invention includes:
[0005] A rotor assembly, including a housing and a rotating shaft, the rotating shaft is installed on the housing, and the periphery of the housing is bent away from the rotating shaft;
[0006] A stator assembly, including a stator end cover and a stator, the stator end cover is installed at the front end of the housing, the stator is fixed to the stator end cover and extends into the housing, the rotating shaft is rotatably connected to the stator, and the periphery of the stator end cover extends along the rear end of the rotating shaft; and
[0007] A waterproof member, provided with a waterproof groove, the waterproof member is annularly arranged outside the housing and is connected to the periphery of the stator end cover, the notch of the waterproof groove faces the front end of the rotating shaft, and the edge of the housing extends into the waterproof groove.
[0008] Optionally, a limiting groove is formed by bending the periphery of the housing, the notch of the limiting groove faces the rear end of the rotating shaft, and the groove wall of the limiting groove extends into the waterproof groove.
[0009] Optionally, a first flanging is provided on the outer peripheral wall of the housing, the first flanging extends away from the rotating shaft, a second flanging is provided at the end of the first flanging, the second flanging extends towards the waterproof member, the first flanging and the second flanging are both annularly arranged on the housing, the outer peripheral wall of the housing, the first flanging and the second flanging enclose to form the limiting groove, the second flanging extends into the waterproof groove, and the second flanging is spaced from the groove wall of the waterproof groove.
[0010] Optionally, the waterproof component includes a waterproof body and a first side wall and a second side wall respectively arranged at both ends of the waterproof body, the first side wall is arranged opposite to the second side wall, the first side wall, the waterproof body and the second side wall are combined to form the waterproof groove, and the second flange is respectively spaced from the first side wall, the waterproof body and the second side wall.
[0011] Optionally, the first side wall extends into the limiting groove, and the first side wall is spaced apart from the first flange and the outer peripheral wall of the housing respectively.
[0012] Optionally, the thickness of the peripheral wall of the casing, the thickness of the first flange, and the thickness of the second flange are all greater than the thickness of the waterproof component.
[0013] Optionally, an annular baffle is protruding from one end of the stator end cover toward the casing, the annular baffle extends toward the rear end of the rotating shaft, the annular baffle is spaced apart from the outer peripheral wall of the casing, and one side of the waterproof component abuts against the annular baffle.
[0014] Optionally, the annular baffle is provided with a water leakage hole.
[0015] Optionally, the waterproof component is hot pressed onto the inner circumferential wall of the annular baffle.
[0016] Optionally, a side wall of the waterproof component is arranged flush with an end surface of the annular baffle.
[0017] Optionally, the outer rotor motor further comprises a waterproof cover, and the waterproof cover is detachably mounted on a side of the stator end cover facing away from the casing.
[0018] The present invention also provides a refrigeration device, comprising the outer rotor motor as described above.
[0019] In the technical solution of the present invention, the front end of the housing is the end with an opening. The stator is placed into the housing through the opening. The stator end cover is installed at the front end of the housing. The rotating shaft is inserted into the housing. The front end of the housing is the front end of the rotating shaft, and the rear end of the housing is the rear end of the rotating shaft. A waterproof member is provided at the connection between the stator end cover and the housing. The periphery of the stator end cover extends towards the rear end of the rotating shaft to cover the waterproof member. The waterproof member is fixed to the inner side of the stator end cover and is arranged around the outer peripheral side of the housing. In the radial direction of the housing, the waterproof member will not be exposed. The waterproof member has a waterproof groove. The periphery of the housing is bent and extends into the waterproof groove. When water vapor enters the connection between the stator end cover and the housing, the waterproof groove can temporarily store the water vapor and block the flow of most of the water vapor. Such a setting can reduce the water vapor entering the outer rotor motor, thereby improving the waterproof ability of the outer rotor motor. Moreover, the waterproof member can also block a part of the dirt from entering the inside of the outer rotor motor, thereby preventing the internal structure from being damaged and improving the protection ability of the outer rotor motor, thus increasing the service life of the outer rotor motor. Description of the Drawings
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0021] Figure 1 It is a cross-sectional view of an embodiment of the outer rotor motor of the present invention;
[0022] Figure 2 It is Figure 1 The partial enlarged view at A in
[0023] Figure 3 It is a cross-sectional view of an embodiment of the outer rotor motor of the present invention placed horizontally;
[0024] Figure 4 It is Figure 3 The partial enlarged view at B in
[0025] Figure 5 It is a schematic structural view of the waterproof member in the outer rotor motor of the present invention;
[0026] Figure 6 It is a schematic structural view of the housing in the outer rotor motor of the present invention.
[0027] Explanation of the reference numerals in the drawings:
[0028] Label Name Label Name 10 Rotor assembly 101 Housing 102 Rotating shaft 103 Rotor 104 Limit groove 105 First flange 106 Second flange 11 Stator assembly 111 Stator end cover 112 Annular baffle 113 Stator 114 Water leakage hole 12 Waterproof part 121 Waterproof groove 122 Waterproof body 123 First side wall 124 Second side wall 13 Waterproof cover
[0029] The implementation, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners
[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0032] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.
[0034] The present invention provides an outer rotor motor.
[0035] In an embodiment of the present invention, as Figures 1 to 6As shown, the outer rotor motor includes a rotor assembly 10, a stator assembly 11 and a waterproof member 12; the rotor assembly 10 includes a housing 101 and a rotating shaft 102, the rotating shaft 102 is installed in the housing 101, and the periphery of the housing 101 is bent away from the rotating shaft 102; the stator assembly 11 includes a stator end cover 111 and a stator 113, the stator end cover 111 is installed at the front end of the housing 101, the stator 113 is fixed to the stator end cover 111 and extends into the housing 101, the rotating shaft 102 is rotatably connected to the stator 113, and the periphery of the stator end cover 111 extends along the rear end of the rotating shaft 102; the waterproof member 12 is provided with a waterproof groove 121, the waterproof member 12 is annularly arranged outside the housing 101 and is connected to the periphery of the stator end cover 111, the notch of the waterproof groove 121 faces the front end of the rotating shaft 102, and the edge of the housing 101 extends into the waterproof groove 121.
[0036] In the technical solution of the present invention, the front end of the housing 101 is the end with an opening, the stator 113 is placed into the housing 101 through the opening, the stator end cover 111 is installed at the front end of the housing 101, the rotating shaft 102 is inserted into the housing 101, the front end of the housing 101 is the front end of the rotating shaft 102, and the rear end of the housing 101 is the rear end of the rotating shaft 102. A waterproof member 12 is provided at the connection between the stator end cover 111 and the housing 101, and the periphery of the stator end cover 111 extends towards the rear end of the rotating shaft 102 to cover the waterproof member 12. The waterproof member 12 is fixed to the inner side of the stator end cover 111 and is annularly arranged on the outer peripheral side of the housing 101. In the radial direction of the housing 101, the waterproof member 12 is not exposed. The waterproof member 12 has a waterproof groove 121, and the periphery of the housing 101 is bent and extends into the waterproof groove 121. When water vapor enters the connection between the stator end cover 111 and the housing 101, the waterproof groove 121 can temporarily store the water vapor and block the flow of most of the water vapor. Such a setting can reduce the water vapor entering the outer rotor motor, thereby improving the waterproof ability of the outer rotor motor. Moreover, the waterproof member 12 can also block a part of the dirt from entering the interior of the outer rotor motor, thereby preventing the internal structure from being damaged, improving the protection ability of the outer rotor motor, and increasing the service life of the outer rotor motor.
[0037] In an embodiment, the periphery of the housing 101 is bent to form a limiting groove 104, the notch of the limiting groove 104 faces the rear end of the rotating shaft 102, and the groove wall of the limiting groove 104 extends into the waterproof groove 121.
[0038] Specifically, the peripheral edge of the housing 101 is bent outward to form a limiting groove 104 on the outer peripheral side of the housing 101. The notch of the limiting groove 104 faces the notch of the waterproof groove 121, and the groove side wall of the limiting groove 104 extends into the waterproof groove 121. The groove side walls of both the waterproof groove 121 and the limiting groove 104 can block water vapor, and the groove bottom wall of the waterproof groove 121 is used to temporarily store water vapor. Such a setting can form a labyrinth structure, achieving a good waterproof effect and enhancing the protection ability of the outer rotor motor. In some other embodiments, the notch of the limiting groove 104 faces the front end of the rotating shaft 102.
[0039] In one embodiment, a first flanging 105 is provided on the outer peripheral wall of the housing 101. The first flanging 105 extends in a direction away from the rotating shaft 102. A second flanging 106 is provided at the end of the first flanging 105. The second flanging 106 extends towards the waterproof member 12. Both the first flanging 105 and the second flanging 106 are arranged around the housing 101. The outer peripheral wall of the housing 101, the first flanging 105, and the second flanging 106 enclose to form the limiting groove 104. The second flanging 106 extends into the waterproof groove 121, and the second flanging 106 is spaced from the groove wall of the waterproof groove 121.
[0040] Specifically, the first flanging 105 is folded outward compared to the outer peripheral wall of the housing 101. A second flanging 106 is provided at the end of the first flanging 105. The second flanging 106 is also angularly connected to the first flanging 105. The second flanging 106 is disposed opposite to the outer peripheral wall of the housing 101. Both the first flanging 105 and the second flanging 106 extend along the outer periphery of the housing 101. The second flanging 106 extends into the waterproof groove 121 and is spaced from all the groove walls of the waterproof groove 121. Such a setting enables the second flanging 106 and the waterproof groove 121 to jointly block water vapor and does not hinder the rotation between the housing 101 and the stator end cover 111. In some other embodiments, the first flanging 105 extends in a direction towards the rotating shaft 102.
[0041] In one embodiment, the waterproof member 12 includes a waterproof body 122 and a first side wall 123 and a second side wall 124 respectively provided at both ends of the waterproof body 122. The first side wall 123 and the second side wall 124 are disposed opposite to each other. The first side wall 123, the waterproof body 122, and the second side wall 124 enclose to form the waterproof groove 121. The second flanging 106 is spaced from the first side wall 123, the waterproof body 122, and the second side wall 124 respectively.
[0042] Specifically, the waterproof body 122 is disposed at a relative interval from the first flanging 105. The first side wall 123 extends into the space between the second flanging 106 and the outer peripheral wall of the housing 101. When water vapor flows, it will first enter the limiting groove 104. The second flanging 106 and the first side wall 123 are used to block the flow of water vapor to the waterproof groove 121. The groove side walls of the waterproof groove 121 are the first side wall 123 and the second side wall 124, which can temporarily store the water vapor in the first side wall 123 and the second side wall 124. Through the first side wall 123, the waterproof body 122, the second side wall 124, the first flanging 105, the second flanging 106, and the outer peripheral wall of the housing 101, a labyrinth structure is jointly formed to block water vapor from entering the outer rotor motor, so as to improve the protection effect of the outer rotor motor.
[0043] In one embodiment, the first side wall 123 extends into the limiting groove 104, and the first side wall 123 is spaced from the first flanging 105 and the outer peripheral wall of the housing 101 respectively.
[0044] Specifically, the first side wall 123 is spaced from all the groove walls of the limiting groove 104, which can prevent the first side wall 123 from interfering with the housing 101 and affecting the rotation of the housing 101. Such a setting can further improve the blocking effect of the first side wall 123 on water vapor and ensure the normal use of the outer rotor motor.
[0045] In one embodiment, the thickness of the peripheral wall of the housing 101, the thickness of the first flanging 105, and the thickness of the second flanging 106 are all greater than the thickness of the waterproof member 12.
[0046] Specifically, setting the thickness of the waterproof member 12 to be relatively thin can ensure the structural strength and waterproof effect while enabling there to be a certain gap between the housing 101, the waterproof member 12, and the stator end cover 111. Such a setting will not affect the rotation of the housing 101 and can also prevent larger impurities from getting stuck in the gaps between the waterproof member 12 and the housing 101 and the stator end cover 111, thus ensuring the use effect of the outer rotor motor and reducing some production costs. In some other embodiments, the thickness of the peripheral wall of the housing 101, the thickness of the first flanging 105, and the thickness of the second flanging 106 are all equal to the thickness of the waterproof member 12.
[0047] In one embodiment, a ring-shaped baffle 112 protrudes from one end of the stator end cover 111 facing the housing 101. The ring-shaped baffle 112 extends towards the rear end of the rotating shaft 102. The ring-shaped baffle 112 is spaced from the outer peripheral wall of the housing 101, and one side of the waterproof member 12 abuts against the ring-shaped baffle 112.
[0048] Specifically, the annular baffle 112 extends towards the rear end of the rotating shaft 102. In the axial direction of the rotating shaft 102, the annular baffle 112 extends to a position where it can cover the gap between the end of the housing 101 and the end of the stator end cover 111. The annular baffle 112 is spaced from the outer peripheral wall of the housing 101 to prevent interference between the two and affect the rotation of the outer rotor 103. One side of the waterproof member 12 is fixed to the inner side of the annular baffle 112. This setting can cover the housing 101, and the waterproof member 12 will not be exposed outside, which can block water vapor from entering the gap between the end of the housing 101 and the end of the stator end cover 111, thereby improving the protection effect of the outer rotor motor.
[0049] In one embodiment, a water leakage hole 114 is formed in the annular baffle 112.
[0050] Specifically, when the outer rotor motor needs to be horizontally installed, water vapor will enter the connection between the stator end cover 111 and the housing 101, and the water vapor will accumulate at the bottom of the annular baffle 112. Therefore, a water leakage hole 114 is formed at the bottom of the annular baffle 112, and the water vapor can be discharged through the water leakage hole 114. This can further prevent the residual water vapor in the outer rotor motor and avoid the failure of the outer rotor motor due to the accumulation of water vapor.
[0051] In one embodiment, the waterproof member 12 is hot-pressed on the inner peripheral wall of the annular baffle 112.
[0052] Specifically, the waterproof member 12 can be a plastic part made of a hydrophobic material, which can avoid the retention of water vapor on the waterproof member 12. By heating the outer wall of the waterproof member 12, the waterproof member 12 can deform after heating, and the outer wall of the waterproof member 12 is in a molten state. Press the waterproof member 12 into the stator end cover 111. After the waterproof member 12 cools, it will be stably adhered to the annular edge. This setting can increase the installation stability of the waterproof member 12, make the waterproof member 12 more tightly installed on the stator end cover 111, and can also improve the heat resistance effect of the waterproof member 12. When the outer rotor motor rotates for a long time, it will generate more heat. If the waterproof member 12 is glued to the annular baffle 112, it may cause delamination, and the installation stability of the waterproof member 12 will decrease, affecting the protection effect of the outer rotor motor. In some other embodiments, the waterproof member 12 is directly injection-molded on the annular baffle 112.
[0053] In one embodiment, one side wall of the waterproof member 12 is flush with the end face of the annular baffle 112.
[0054] Specifically, when the outer rotor motor is placed vertically, the lower end surface of the waterproof member 12 is flush with the lower end surface of the annular baffle 112. With this arrangement, the waterproof member 12 does not protrude from the stator end cover 111, which can avoid contact with the outside world. Therefore, the influence of external factors on the waterproof member 12 can be reduced, the service life of the waterproof member 12 can be extended, and thus a better protection effect of the outer rotor motor can be ensured. In some other embodiments, the end surface of the annular baffle 112 is closer to the rear end of the housing 101 than one side wall of the waterproof member 12.
[0055] In one embodiment, the outer rotor motor further includes a waterproof cover 13, and the waterproof cover 13 is detachably mounted on the side of the stator end cover 111 facing away from the housing 101.
[0056] Specifically, the waterproof cover 13 is mounted on the front end of the stator end cover 111. The waterproof cover 13 is provided with a plurality of through holes, and the stator end cover 111 is provided with threaded holes corresponding to the plurality of through holes. After the bolts pass through the through holes, they are screwed into the threaded holes, and a sealing element is provided at the through holes for sealing. With this arrangement, water vapor can be prevented from entering the stator end cover 111, and the stator 113 can be prevented from oxidizing or rusting. Therefore, the stator 113 can stably generate a rotating magnetic field, making the outer rotor motor more stable and having a longer service life. In some other embodiments, the waterproof cover 13 is fixedly mounted on the side of the stator end cover 111 facing away from the housing 101. Further, the waterproof cover 13 is welded to the stator end cover 111.
[0057] The present invention also provides a refrigeration device, which can be divided into compression refrigeration devices, absorption refrigeration devices, steam jet refrigeration devices, heat pump refrigeration devices, electrothermal refrigeration devices, etc. The refrigeration device mainly includes a compressor, an expansion valve, an evaporator, a condenser, and accessories, pipelines, and an outer rotor motor. Such as refrigerators, air conditioners, etc. The specific structure of the outer rotor motor refers to the above embodiments. Since this refrigeration device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0058] The above are only optional embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims
1. An external rotor motor, characterized in that, include: The rotor assembly comprises a housing and a rotating shaft, wherein the rotating shaft is mounted on the housing, and the periphery of the housing is bent in a direction away from the rotating shaft; a stator assembly, comprising a stator end cover and a stator, wherein the stator end cover is mounted on the front end of the housing, the stator is fixed to the stator end cover and extends into the housing, the rotating shaft is rotatably connected to the stator, and the periphery of the stator end cover is extended along the rear end of the rotating shaft; and A waterproof member is provided with a waterproof groove, the waterproof member is arranged on the outer side of the casing and connected to the periphery of the stator end cover, the notch of the waterproof groove faces the front end of the rotating shaft, and the edge of the casing extends into the waterproof groove.
2. The external rotor motor according to claim 1, characterized in that, The periphery of the housing is bent to form a limiting groove, the notch of the limiting groove faces the rear end of the rotating shaft, and the groove wall of the limiting groove extends into the waterproof groove.
3. The external rotor motor according to claim 2, characterized in that, The outer peripheral wall of the casing is provided with a first flange, and the first flange extends in a direction away from the rotating shaft. The end of the first flange is provided with a second flange, and the second flange extends toward the waterproof component. The first flange and the second flange are both arranged in a ring around the casing. The outer peripheral wall of the casing, the first flange and the second flange together form the limiting groove. The second flange extends into the waterproof groove, and the second flange is spaced from the groove wall of the waterproof groove.
4. The external rotor motor according to claim 3, characterized in that, The waterproof component includes a waterproof body and a first side wall and a second side wall respectively arranged at two ends of the waterproof body, the first side wall and the second side wall are arranged opposite to each other, the first side wall, the waterproof body and the second side wall are combined to form the waterproof groove, and the second flange is respectively spaced from the first side wall, the waterproof body and the second side wall.
5. The external rotor motor according to claim 4, characterized in that, The first side wall extends into the limiting groove, and the first side wall is spaced apart from the first flange and the outer peripheral wall of the housing respectively.
6. The external rotor motor according to claim 4, characterized in that, The thickness of the peripheral wall of the housing, the thickness of the first flange, and the thickness of the second flange are all greater than the thickness of the waterproof component.
7. The external rotor motor according to claim 1, characterized in that, An annular baffle is protruded from one end of the stator end cover toward the housing, the annular baffle extends toward the rear end of the rotating shaft, the annular baffle is spaced apart from the outer peripheral wall of the housing, and one side of the waterproof member abuts against the annular baffle.
8. The external rotor motor according to claim 7, characterized in that, The annular baffle is provided with a water leakage hole.
9. The external rotor motor according to claim 7, characterized in that, The waterproof member is hot pressed on the inner peripheral wall of the annular baffle.
10. The external rotor motor according to claim 7, characterized in that, A side wall of the waterproof member is arranged flush with the end surface of the annular baffle.
11. The external rotor motor according to any one of claims 1 to 10, characterized in that, The outer rotor motor further comprises a waterproof cover which is detachably mounted on a side of the stator end cover away from the housing.
12. A refrigeration device, characterized in that, The invention comprises an outer rotor motor as claimed in any one of claims 1 to 11.