Outer rotor motor, water pump and refrigeration equipment

Abstract

The utility model discloses an external rotor motor, a water pump and refrigeration equipment, and relates to the technical field of motors, the external rotor motor comprises a stator, a rotor and a bearing member; the rotor comprises a rotor body and a rotating shaft which are connected with each other, the rotor body rotatably sleeves the stator, and one end of the rotating shaft is connected to the rotor body; the bearing part comprises a supporting seat and a supporting column which are connected, the supporting column is inserted into the stator, a bearing is arranged in a through hole of the supporting column, the rotating shaft rotatably penetrates through the bearing and extends out of the supporting seat, the supporting seat is located on the side, away from the rotor body, of the stator, and the supporting seat is located on the side, away from the rotor body, of the stator. And the supporting seat is opposite to the opening of the rotor body and is used for connecting an external structure. According to the technical scheme provided by the utility model, the number of components of the external rotor motor is reduced, the compactness of the external rotor motor is improved, and the rotation stability of the rotor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an outer rotor motor, a water pump and a refrigeration device. Background Art

[0002] Outer rotor motors are widely used due to their high efficiency, low noise and light weight. They are usually structured in that the rotor body is wrapped around the stator for efficient operation. In related technologies, outer rotor motors usually fix the bearings to the middle of the stator first, and then the rotor shaft is passed through the bearings. The stator is then fixed to the cavity formed in the rotor body with a cover. When the outer rotor motor is used, the cover is connected to the cover by a connecting structure or is axially limited to the shaft. However, there are many connection structures in this way. During the operation of the outer rotor motor, it is easy for the motor to loosen and make abnormal noises, or even cause the rotor to rotate distortedly. Utility Model Content

[0003] The main purpose of the utility model is to provide an outer rotor motor, a water pump and a refrigeration device, aiming to reduce the number of components of the outer rotor motor and improve the compactness of the outer rotor motor, thereby ensuring the rotation stability of the rotor.

[0004] To achieve the above-mentioned purpose, the outer rotor motor proposed by the utility model comprises:

[0005] stator;

[0006] A rotor, comprising a rotor body and a rotating shaft connected to each other, wherein the rotor body is rotatably sleeved on the stator, and one end of the rotating shaft is connected to the rotor body; and

[0007] The bearing component includes a supporting seat and a supporting column connected to each other. The supporting column is inserted into the stator. A bearing is provided in a through hole of the supporting column. The rotating shaft is rotatably passed through the bearing and extends out from the supporting seat. The supporting seat is located on a side of the stator away from the rotor body and opposite to the opening of the rotor body. The supporting seat is used to connect to an external structure.

[0008] In one embodiment, a flat portion is provided on the outer circumference of the support column, the stator is provided with a mounting hole, the support column is inserted into the mounting hole, and the side wall of the mounting hole is adapted to abut against the flat portion in the circumferential direction.

[0009] In one embodiment, a positioning step surface is provided on the outer periphery of the support column, and the peripheral wall of the mounting hole abuts against the positioning step surface in the axial direction.

[0010] In one embodiment, the through hole of the support column is provided with a bearing mounting position, the bearing mounting position is arranged through the through hole of the support column in a direction away from the support seat, and the bearing limiter is installed at the bearing mounting position.

[0011] In one embodiment, at least one of the radially opposite sides of the rotating shaft and the bearing is recessed with a receiving structure, and the receiving structure is used to receive a lubricating substance.

[0012] In one embodiment, the accommodation structure is configured as a first annular groove recessed in the inner peripheral wall of the bearing, and the first annular groove is spaced apart from two ends of the bearing in the axial direction of the bearing.

[0013] In one embodiment, the accommodating structure is configured as a second annular groove recessed on an outer peripheral wall of the rotating shaft opposite to the bearing.

[0014] The utility model also provides a water pump, the water pump comprising:

[0015] A pump housing, wherein a receiving cavity is formed in the pump housing, the receiving cavity is equipped with the aforementioned outer rotor motor, and the support seat is located at the cavity opening of the receiving cavity;

[0016] The pump head is connected to the pump housing and pressed against the support seat. The pump head is provided with a fluid cavity and a liquid inlet and a liquid outlet connected to the fluid cavity. An impeller is provided in the fluid cavity, and the impeller is connected to the end of the rotating shaft away from the rotor body.

[0017] In one embodiment, a fastening ring is provided on one side of the pump head connected to the pump housing, and a limiting ring is provided on the side of the support seat facing the pump head. The limiting ring is sleeved on the outer circumference of the fastening ring, and the fastening ring has a tendency to elastically deform outward so as to be tightly pressed against the limiting ring in the radial direction.

[0018] In one embodiment, the water pump is also provided with a sealing ring, the pump head includes a main body shell and an enclosing plate, the enclosing plate cover is arranged at the cavity opening of the fluid cavity, the fastening ring is arranged on the side of the enclosing plate away from the fluid cavity, the rotating shaft passes through the enclosing plate and is connected to the impeller, and the sealing ring is tightly clamped between the enclosing plate and the main body shell.

[0019] In one embodiment, the fastening ring is provided with a water drainage gap, a water drainage port is formed between the pump housing and the pump head, and the water drainage gap is communicated with the water drainage port.

[0020] In one embodiment, the rotating shaft and the connecting hole of the impeller are interference fit.

[0021] In one embodiment, the pump housing is provided with a magnetic component at the bottom of the receiving cavity, the rotating shaft is arranged to penetrate the rotor body, and is magnetically attracted to the magnetic component at the end away from the impeller.

[0022] In one embodiment, a plurality of fasteners are provided on the outer circumference of the pump housing, buckle grooves are provided in the fasteners, and convex buckles are provided on the outer circumference of the pump head, and the convex buckles are snap-fitted into the corresponding buckle grooves.

[0023] In one embodiment, the support seat and the pump housing are sealed by injection of glue.

[0024] The utility model also provides a refrigeration device, which includes the water pump as mentioned above.

[0025] The technical solution of the utility model is to install the bearing in the bearing component, the bearing component includes a support column fixedly inserted into the middle of the stator and a support seat stably connected to the end of the support column, the through hole on the support column passes through the support seat and the support column, and the bearing limiter is installed in the through hole of the support column, wherein the rotating shaft rotatably passes through the bearing and extends out of the through hole on the side where the support seat is set, the support seat is opposite to the opening of the rotor, and the stator is limited in the cavity formed by the rotor body. When the outer rotor motor needs to be installed, the support seat can be connected to the external structure. In this way, the connection between the stator and the bearing component is stable, and the connection between the rotating shaft and the bearing component in the axial direction is stable. The bearing component is connected to the external structure, which reduces the transmission path of the internal force of the outer rotor motor, and also reduces the connection error of the connection structure, thereby improving the integrity and compactness of the outer rotor motor, avoiding the problem of abnormal noise or deflection of the outer rotor motor, and ensuring the operating stability of the outer rotor motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 An exploded schematic diagram of an embodiment of an outer rotor motor provided by the utility model;

[0028] Figure 2 A cross-sectional view of the outer rotor motor provided by the utility model;

[0029] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0030] Figure 4 A schematic structural diagram of an embodiment of a water pump provided by the utility model;

[0031] Figure 5 for Figure 4 Schematic diagram of the explosion of the water pump;

[0032] Figure 6 for Figure 4 Cross-sectional view of the water pump;

[0033] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0034] Description of Figure Numbers:

[0035] 100, stator; 110, mounting hole; 120, control board; 200, rotor; 210, rotor body; 220, rotating shaft; 221, second ring groove;

[0036] 300, bearing member; 310, support seat; 311, limit ring; 320, support column; 321, flat position; 322, positioning step surface; 323, bearing mounting position; 324, through hole; 330, bearing; 331, first ring groove;

[0037] 400, pump housing; 410, receiving chamber; 420, fastener; 430, magnetic member;

[0038] 500, pump head; 510, liquid inlet; 520, liquid outlet; 530, fluid chamber; 540, impeller; 550, enclosure plate; 551, fastening ring; 552, drain gap; 560, body shell; 561, drain port; 562, convex buckle; 570, sealing ring.

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0043] In the prior art, a positioning column for bearing installation is provided in the middle of the stator of the outer rotor motor, a through hole is formed in the positioning column, and cavities for bearing limit installation are formed at both ends of the through hole, the rotating shaft of the rotor is rotatably passed through the inner hole of the bearing, and forms an axial limit with the through hole of the positioning column, and then the cover covers the stator in the cavity formed by the rotor. When the outer rotor motor needs to be installed, the cover is fixed by an external component, and the rotating shaft is connected by transmission, or the rotating shaft is connected by transmission and fixed by limit to achieve stable installation of the outer rotor motor. However, the above-mentioned outer rotor motor needs to be connected at multiple locations before it can be installed, and the accumulated errors at the connection locations will affect the stability of the rotor rotation, which is not only easy to make abnormal noises due to the looseness of the connection locations, but also easy to cause the rotor to rotate and swing and form noise.

[0044] The utility model provides an outer rotor motor.

[0045] See also Figures 1 to 3 In one embodiment of the utility model, the outer rotor motor comprises:

[0046] Stator 100;

[0047] The rotor 200 includes a rotor body 210 and a rotating shaft 220 connected to each other. The rotor body 210 is rotatably sleeved on the stator 100, and one end of the rotating shaft 220 is connected to the rotor body 210; and

[0048] The bearing member 300 includes a support seat 310 and a support column 320 connected to each other. The support column 320 is inserted into the stator 100. A bearing 330 is provided in the through hole 324 of the support column 320. The rotating shaft 220 is rotatably passed through the bearing 330 and extends from the support seat 310. The support seat 310 is located on the side of the stator 100 away from the rotor body 210 and is opposite to the opening of the rotor body 210. The support seat 310 is used to connect to an external structure.

[0049] The technical solution of the utility model is to install the bearing 330 in the bearing member 300, and the bearing member 300 includes a support column 320 fixedly inserted into the middle of the stator 100 and a support seat 310 stably connected to the end of the support column 320, and the through hole 324 on the support column 320 passes through the support seat 310 and the support column 320, and the bearing 330 is limitedly installed in the through hole 324 of the support column 320, wherein the rotating shaft 220 is rotatably penetrated in the bearing 330, and the through hole 324 is extended on one side of the support seat 310, and the support seat 310 is opposite to the opening of the rotor 200, so that the stator 100 is limited in the cavity formed by the rotor body 210. When the outer rotor motor needs to be installed, the support seat 310 can be connected to the external structure. In this way, the connection between the stator 100 and the bearing member 300 is stable, and the connection between the rotating shaft 220 and the bearing member 300 in the axial direction is stable. The bearing member 300 is connected to the external structure, which reduces the transmission path of the internal force of the outer rotor motor and reduces the connection error of the connection structure. The integrity and compactness of the outer rotor motor are improved, the abnormal noise or deflection of the outer rotor motor is avoided, and the operating stability of the outer rotor motor is guaranteed.

[0050] It should be noted that the outer rotor motor of this solution only needs to be provided with one bearing 330. After the support seat 310 is connected to the external structure, it will remain stable in the axial and circumferential directions. The rotating shaft 220 can be connected to the driving target, and the driving target and the rotor body 210 together form an axial limit for the rotating shaft 220, or the rotating shaft 220 forms an axial limit with the support column 320 in the through hole 324 of the support column 320, thereby ensuring the relative stability of the stator 100 or the bearing member 300 and the rotor 200. It can be understood that, if Figure 1 As shown, a control board 120 is provided on the side of the stator 100 away from the rotor body 210, and the control board 120 is used to control the rotation of the rotor 200. The support seat 310 can press the control board 120 against the stator 100, or can be spaced apart from the control board 120 in the axial direction and connected to the stator 100 only through the support column 320. The axial, circumferential and radial directions referred to in this technical solution are all referenced to the rotating shaft 220, and the external structure is used for the installation and fixation of the outer rotor motor.

[0051] In one embodiment, please refer to Figure 1 and Figure 2, the outer circumference of the support column 320 is provided with a flat position 321, the stator 100 is provided with a mounting hole 110, the support column 320 is inserted into the mounting hole 110, and the side wall of the mounting hole 110 is adapted to abut against the flat position 321 in the circumferential direction. It can be understood that the support column 320 is adapted to abut against the mounting hole 110 of the stator 100, that is, the two are closely abutted in both the circumferential direction and the axial direction. When the flat position 321 is provided on the outer circumference of the support column 320, the hole wall of the mounting hole 110 is also usually provided with an abutment position to abut against the flat position 321, thereby forming a circumferential limit with the support column 320, preventing the stator 100 and the support column 320 from rotating relative to each other in the circumferential direction, and ensuring the output stability of the outer rotor motor. Of course, in other embodiments, limiting ribs may be provided on the outer periphery of the support column 320, and limiting grooves may be provided on the hole wall of the mounting hole 110, and both the limiting grooves and the limiting ribs extend in the axial direction of the rotating shaft 220, thereby ensuring that the stator 100 and the support column 320 remain relatively stable in the circumferential direction.

[0052] Further, in this embodiment, please refer to Figure 1 and Figure 2 The outer periphery of the support column 320 is provided with a positioning step surface 322, and the peripheral wall of the mounting hole 110 abuts against the positioning step surface 322 in the axial direction. It can be understood that the support column 320 and the mounting hole 110 are interference fit. After the support column 320 is inserted into the mounting hole 110, the positioning step surface 322 abuts against the hole wall of the mounting hole 110 in the axial direction to limit the stability of the support column 320 and the stator 100 in the axial direction. At the same time, the positioning step surface 322 also provides a positioning reference for the depth of the support column 320 inserted into the stator 100, so as to prevent the support column 320 from abutting against the rotor body 210 and affecting the rotation of the rotor 200, or to prevent the support seat 310 from abutting against the opening of the stator 100 or the rotor body 210 and causing the rotor 200 to rotate. Of course, in other embodiments, relative limiting steps may be provided at both ends of the support column 320 , and the two limiting steps form axial limiting for the stator 100 at both ends of the mounting hole 110 , thereby ensuring the axial stability of the stator 100 and the bearing assembly 300 .

[0053] In one embodiment, please refer to Figure 1 and Figure 2, the through hole 324 of the support column 320 is provided with a bearing installation position 323, the bearing installation position 323 is set to pass through the through hole 324 of the support column 320 in a direction away from the support seat 310, and the bearing 330 is limitedly installed in the bearing installation position 323. In this way, during the installation process of the bearing 330, the bearing 330 is first installed in the bearing installation position 323 from the end of the through hole 324 away from the support seat 310, and remains stable in the bearing installation position 323, thereby ensuring the rotation stability of the rotating shaft 220. It should be noted that the external structure forms a supporting effect on the support seat 310, and the bearing installation position 323 is set to pass through the through hole 324 in a direction away from the support seat 310, forming a supporting effect on the bearing 330. Without loss of generality, after the bearing 330 is installed in the bearing installation position 323, a limiting structure for the bearing 330 is formed on the rotating shaft 220 and the side wall of the through hole 324, so as to limit the bearing 330 in the bearing installation position 323 on the side of the bearing 330 away from the support seat 310. Of course, in other embodiments, an axial limiting structure for the bearing 330 can also be formed on the rotating shaft 220, and when the rotating shaft 220 is inserted into the bearing 330, the rotating shaft 220 remains axially stable relative to the support column 320, that is, the bearing 330 remains axially stable relative to the support column 320.

[0054] In one embodiment, please refer to Figure 2 and Figure 3 , at least one of the radially opposite sides of the rotating shaft 220 and the bearing 330 is recessed with a receiving structure, and the receiving structure is used to receive lubricating substances. It should be noted that the rotating shaft 220 and the bearing 330 or the rotating shaft 220 itself rotates in the lubricating substance. During the rotation of the rotating shaft 220 relative to the bearing 330, the rotating shaft 220 is prone to sliding friction with the bearing 330. The lubricating substance can reduce the friction resistance between the rotating shaft 220 and the sliding section. At least one of the radially opposite sides of the rotating shaft 220 and the bearing 330 is recessed with a receiving structure, and the receiving structure can receive part of the lubricating substance between the rotating shaft 220 and the bearing 330. In this way, during the high-speed rotation of the rotating shaft 220, the centrifugal effect of the lubricating substance in the solute structure is relatively weak, so as to ensure the stability of the oil film formed by the surface of the rotating shaft 220 and the inner hole surface of the bearing 330, thereby reducing the excessive temperature rise of the rotating shaft 220 and the bearing 330 due to friction, and ensuring the efficiency of the motor. The lubricating substance may be calcium-based grease, sodium-based grease, lithium-based grease or other lubricating grease, or lubricating oil or other lubricating substances. In addition, the lubricating substance stabilized in the accommodating structure also forms an oil seal protection for the gap between the rotating shaft 220 and the bearing 330, preventing external impurities from entering the gap between the rotating shaft 220 and the through hole 324 between the rotor body 210 and the stator 100, thereby ensuring the rotation stability of the outer rotor motor.

[0055] For further information, please refer to Figure 2 and Figure 3The accommodation structure is configured as a first annular groove 331 recessed in the inner peripheral wall of the bearing 330, and the first annular groove 331 is spaced apart from the two ends of the bearing 330 in the axial direction of the bearing 330. It can be understood that the first annular groove 331 is recessed inward from the inner hole wall of the bearing 330 to form a certain space, and the first annular groove 331 does not penetrate the inner hole of the bearing 330 in the axial direction, so as to ensure the stability of the lubricating substance in the first annular groove 331 during the rotation of the rotating shaft 220, thereby improving the stability of the oil film formed between the rotating shaft 220 and the bearing 330, avoiding the rotating shaft 220 or the bearing 330 from heating up too fast or making abnormal rotation noise, and at the same time, the stable oil film also has a good sealing performance for the gap between the rotating shaft 220 and the bearing 330, avoiding foreign substances from contaminating the rotating air gap between the rotor body 210 and the stator 100, and improving the protection level of the outer rotor motor.

[0056] Similarly, in this embodiment, please continue to refer to Figure 2 and Figure 3 , the accommodation structure is configured as a second annular groove 221 recessed on the outer peripheral wall of the rotating shaft 220 relative to the bearing 330. It can be understood that the second annular groove 221 is recessed inward on the outer periphery of the rotating shaft 220 to form a certain space, and the second annular groove 221 does not penetrate the through hole 324 of the support column 320 in the axial direction, so as to ensure that the lubricating material can remain stable in the second annular groove 221 during the rotation of the rotating shaft 220, thereby improving the stability of the oil film formed between the rotating shaft 220 and the bearing 330, avoiding the rotating shaft 220 or the bearing 330 from heating up too fast or making abnormal noises, and at the same time, the stable oil film also has good sealing performance for the gap between the rotating shaft 220 and the bearing 330, avoiding foreign substances from contaminating the rotating air gap between the rotor body 210 and the stator 100, and improving the protection level of the outer rotor motor. Of course, while the first annular groove 331 is provided in the inner hole of the bearing 330, the outer periphery of the rotating shaft 220 may also be provided with a second annular groove 221, and the first annular groove 331 may be provided oppositely or staggered in the radial direction. In other embodiments, the accommodating structure may also be configured as a groove with a texture distribution.

[0057] The utility model also proposes a water pump, which includes an outer rotor motor. The specific structure of the outer rotor motor refers to the above-mentioned embodiment. Since the water pump adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0058] In this embodiment, please refer to Figures 4 to 6The water pump also includes a pump casing 400 and a pump head 500. A receiving chamber 410 is formed in the pump casing 400. The receiving chamber 410 is installed with the outer rotor motor as mentioned above. The support seat 310 is located at the cavity mouth of the receiving chamber 410. The pump head 500 is connected to the pump casing 400 and pressed against the support seat 310. The pump head 500 is provided with a fluid cavity 530 and a liquid inlet 510 and a liquid outlet 520 connected to the fluid cavity 530. An impeller 540 is provided in the fluid cavity 530. The impeller 540 is connected to the end of the rotating shaft 220 away from the rotor body 210. During the assembly process, the outer rotor motor is first assembled, and then the rotor 200 of the outer rotor motor is installed in the receiving chamber 410 with the support seat 310 outside. In the process of connecting the pump head 500 to the pump housing 400, the rotating shaft 220 is connected to the impeller 540. When the pump head 500 is connected to the pump housing 400, the pump head 500 presses against the support seat 310, thereby electronically stabilizing the outer rotor 200 in the receiving chamber 410. At the same time, the force of the pump head 500 on the support seat 310 ensures the relative stability of the stator 100 and the rotor 200. In addition, the setting of the bearing member 300 reduces the number of components of the water pump, simplifies the assembly process, and effectively utilizes the space of the pump housing 400, improves the compactness of the structure of the water pump, and greatly improves the manufacturing productivity. Compared with the water pump using the inner rotor motor in the prior art, the water pump of this embodiment uses the outer rotor motor, which has the advantages of low noise, low vibration, high efficiency, low cost and high reliability. It should be noted that, in this embodiment, the rotor body 210 is stably connected to the end of the rotating shaft 220 in the axial direction, and the other end of the rotating shaft 220 is axially fixed to the impeller 540. Under the pressing action of the pump head 500, the rotating shaft 220 remains stable in the axial direction, thereby improving the rotation stability of the outer rotor motor.

[0059] In one embodiment, please refer to Figures 5 to 7A fastening ring 551 is provided on one side of the pump head 500 connected to the pump housing 400, and a limiting ring 311 is provided on the side of the support seat 310 facing the pump head 500. The limiting ring 311 is sleeved on the outer circumference of the fastening ring 551, and the fastening ring 551 has a tendency to elastically deform outward so as to be tightly pressed against the limiting ring 311 in the radial direction. It can be understood that the inner circumference of the limiting ring 311 of the support seat 310 is adapted to the outer circumference of the fastening ring 551. In the process of assembling the water pump, the fastening ring 551 of the pump head 500 is inserted into the limiting ring 311 of the support seat 310. Since the fastening ring 551 has a radial elastic deformation tendency, the fastening ring 551 can further have a certain limiting effect on the limiting ring 311 in the circumferential, radial and axial directions, ensuring the stability of the bearing member 300 in the water pump, thereby preventing the stator 100 and the bearing member 300 from rotating in the pump housing 400, improving the operating stability of the outer rotor motor, and also improving the operating reliability and stability of the water pump. In addition, the fastener is also directly pressed against the support seat 310 in the axial direction, the connection method between the support seat 310 and the pump head 500 is simple, and the pump head 500 is directly pressed against the support seat 310, which effectively utilizes the space in the water pump and improves the compactness of the water pump.

[0060] Further, in this embodiment, please refer to Figures 5 to 7 The water pump is also provided with a sealing ring 570. The pump head 500 includes a main body shell 560 and an enclosure plate 550. The enclosure plate 550 is covered at the cavity opening of the fluid cavity 530. The fastening ring 551 is provided on the side of the enclosure plate 550 away from the fluid cavity 530. The rotating shaft 220 passes through the enclosure plate 550 and is connected to the impeller 540. The sealing ring 570 is tightly clamped between the enclosure plate 550 and the main body shell 560. It can be understood that the pump head 500 is divided into a body shell 560 and an enclosure plate 550, which is convenient for the manufacture and production of the pump head 500, wherein the liquid inlet 510, the liquid outlet 520 and the fluid cavity 530 are all formed on the body shell 560, and after the enclosure plate 550 is covered on the cavity opening of the fluid cavity 530, the rotating shaft 220 drives the impeller 540 to rotate, and the fluid can enter the fluid cavity 530 from the liquid inlet 510 under the drive of the impeller 540, and then flow out from the liquid outlet 520. In this way, a sealing ring 570 is tightly clamped between the outer periphery of the enclosure plate 550 and the body shell 560, which improves the sealing of the connection between the enclosure plate 550 and the body shell 560, thereby improving the sealing of the fluid cavity 530, so as to ensure that the fluid can flow stably from the liquid inlet 510 to the liquid outlet 520 under the driving action of the impeller 540. Of course, in other embodiments, the pump head 500 can also be integrally formed.

[0061] In this embodiment, please refer to Figures 5 to 7The fastening ring 551 is provided with a water leakage gap 552 , a water leakage opening 561 is formed between the pump housing 400 and the pump head 500 , and the water leakage gap 552 is communicated with the water leakage opening 561 . It should be noted that an avoidance opening (not shown) is provided on the inner circumference of the fastening ring 551 of the enclosing plate 550, and the impeller 540 is connected to the rotating shaft 220 from the avoidance opening. In order to ensure the rotation stability of the impeller 540, a certain gap is provided between the impeller 540 and the avoidance opening, and the gap enables the fluid cavity 530 to be connected between the pump head 500 and the support seat 310. In this way, a drainage notch 552 is provided on the ring wall of the fastening ring 551, and a drainage opening 561 is formed between the pump casing 400 and the pump head 500. When a small amount of fluid in the fluid cavity 530 flows back from the avoidance opening to between the enclosing plate 550 and the support seat 310, due to the action of centrifugal force, this part of the fluid first passes through the drainage notch 552, and then flows out of the outside of the water pump through the drainage opening 561, thereby preventing the fluid from flowing back into the outer rotor motor, thereby ensuring the operating reliability and stability of the outer rotor motor or the water pump. Of course, in other embodiments, a water retaining ring may be provided around the rotating shaft 220 on the support seat 310, and the outer diameter of the water retaining ring may be smaller than the ring opening formed after the impeller 540 passes through the avoidance opening, thereby ensuring that the water retaining ring can prevent the reflux fluid from invading the outer rotor motor, thereby improving the protection level of the water pump.

[0062] In one embodiment, please refer to Figure 6 and Figure 7 , the connecting hole of the rotating shaft 220 and the impeller 540 is interference fit. The interference fit method ensures the connection stability between the rotating shaft 220 and the impeller 540, thereby ensuring that the outer rotor motor can stably drive the impeller 540 to rotate, ensuring the operation stability of the water pump, and at the same time, the interference fit method is adopted to reduce the connection structure between the impeller 540 and the rotating shaft 220, reduce the connection components, and improve the compactness of the water pump. Without loss of generality, the impeller 540 is formed with a step surface at the avoidance opening of the enclosure plate 550, and the step surface is arranged toward the outer rotor motor. In this way, the step surface can abut against the enclosure plate 550 and cooperate with the rotor body 210 to ensure the stability of the rotating shaft 220 in the axial direction.

[0063] In one embodiment, please refer to Figure 6 The pump housing 400 is provided with a magnetic part 430 at the bottom of the receiving chamber 410, and the rotating shaft 220 is arranged to penetrate the rotor body 210, and is magnetically attracted to the magnetic part 430 at the end away from the impeller 540. In this way, the magnetic part 430 and the rotating shaft 220 are opposite to each other in the axial direction, and under the magnetic attraction of the magnetic part 430, the rotating shaft 220 is prevented from vibrating in the axial direction, and the stability of the impeller 540 driven by the outer rotor motor is improved. Of course, in other embodiments, an axial limiting structure can also be provided at the bottom of the receiving chamber 410, and the end of the rotating shaft 220 is clamped in the axial limiting structure in the axial direction and can rotate freely in the circumferential direction.

[0064] In one embodiment, please refer to Figure 4 and Figure 5 , the outer circumference of the pump housing 400 is provided with a plurality of fasteners 420, and a buckle groove (not shown) is provided in the fasteners 420, and a convex buckle 562 is provided on the outer circumference of the pump head 500, and the convex buckle 562 is snapped into the corresponding buckle groove. When connecting the pump housing 400 and the pump head 500, the convex buckle 562 on the outer circumference of the pump head 500 is inserted into the fastener 420 of the pump housing 400, and the convex buckle 562 is snapped into the buckle groove on the fastener 420, so as to realize the connection between the pump head 500 and the pump housing 400, and the connection is stable and the operation is convenient. At the same time, the plurality of fasteners 420 are evenly distributed on the outer circumference of the pump housing 400, and similarly, the convex buckle 562 is also evenly distributed on the outer circumference of the pump head 500, so as to ensure the stability in the circumferential and axial directions after the pump housing 400 and the pump head 500 are connected. Without loss of generality, the outer diameter of the pump housing 400 is adapted to the inner diameter of the pump head 500. When the pump housing 400 is inserted into the pump head 500, the protrusions 562 on the outer periphery of the pump head 500 are also inserted into the fasteners 420 on the outer periphery of the pump housing 400. Since the protrusions 562 are raised in the radial direction, when the protrusions 562 guide the fasteners 420 to undergo elastic deformation until the protrusions 562 and the buckle grooves are radially opposite and engaged, the fasteners 420 elastically recover, thereby stably engaging with the protrusions 562.

[0065] In one embodiment, please refer to Figure 6 and Figure 7 , glue is injected and sealed between the support seat 310 and the pump housing 400. It should be noted that there is a certain gap between the outer periphery of the support seat 310 and the cavity wall of the receiving cavity 410, that is, the inner circumferential wall of the pump housing 400. After the pump head 500 is pressed against the support seat 310, glue is injected and sealed between the support seat 310 and the pump housing 400, so that the support seat 310 and the pump housing 400 are stably connected. During the operation of the external rotor motor, the stator 100 can remain stable relative to the pump housing 400 through the bearing 300, ensuring that the rotor 200 can drive the impeller 540 to transmit stably, thereby improving the operational stability and reliability of the water pump. At the same time, glue is injected and sealed between the support seat 310 and the pump housing 400 to prevent the fluid in the pump head 500 from flowing back into the receiving cavity 410 of the pump housing 400, thereby improving the protection level of the water pump.

[0066] The utility model also provides a refrigeration device, which includes a water pump. The specific structure of the water pump refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. In one embodiment, the refrigeration device is configured as an air conditioner, and the water pump is configured as an air conditioning drainage pump.

[0067] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An outer rotor motor, characterized in that: include: stator; The rotor comprises a rotor body and a rotating shaft connected to each other, wherein the rotor body is rotatably sleeved on the stator, and one end of the rotating shaft is connected to the rotor body; as well as The bearing component includes a supporting seat and a supporting column connected to each other. The supporting column is inserted into the stator. A bearing is provided in a through hole of the supporting column. The rotating shaft is rotatably passed through the bearing and extends out from the supporting seat. The supporting seat is located on a side of the stator away from the rotor body and opposite to the opening of the rotor body. The supporting seat is used to connect to an external structure.

2. The outer rotor motor according to claim 1, characterized in that: The outer circumference of the support column is provided with a flat portion, the stator is provided with a mounting hole, the support column is inserted into the mounting hole, and the side wall of the mounting hole is adapted to abut against the flat portion in the circumferential direction.

3. The outer rotor motor according to claim 2, characterized in that: The outer periphery of the support column is provided with a positioning step surface, and the peripheral wall of the mounting hole abuts against the positioning step surface in the axial direction.

4. The outer rotor motor according to claim 1, characterized in that: The through hole of the support column is provided with a bearing installation position, and the bearing installation position is arranged through the through hole of the support column in a direction away from the support seat, and the bearing limiter is installed at the bearing installation position.

5. The outer rotor motor according to claim 1, characterized in that: At least one of the radially opposite sides of the rotating shaft and the bearing is recessed with a receiving structure, and the receiving structure is used to receive a lubricating substance.

6. The outer rotor motor according to claim 5, characterized in that: The accommodating structure is configured as a first annular groove recessed on the inner peripheral wall of the bearing, wherein the first annular groove is spaced apart from two ends of the bearing in the axial direction of the bearing; And / or, the accommodating structure is configured as a second annular groove recessed in the outer peripheral wall of the rotating shaft relative to the bearing.

7. A water pump, characterized in that: include: A pump housing, wherein a receiving cavity is formed in the pump housing, the receiving cavity is equipped with an outer rotor motor as claimed in any one of claims 1 to 6, and the support seat is located at the cavity opening of the receiving cavity; The pump head is connected to the pump housing and pressed against the support seat. The pump head is provided with a fluid cavity and a liquid inlet and a liquid outlet connected to the fluid cavity. An impeller is provided in the fluid cavity, and the impeller is connected to the end of the rotating shaft away from the rotor body.

8. The water pump according to claim 7, characterized in that A fastening ring is provided on one side of the pump head connected to the pump housing, and a limiting ring is provided on the side of the support seat facing the pump head. The limiting ring is sleeved on the outer circumference of the fastening ring, and the fastening ring has a tendency to elastically deform outward so as to be tightly pressed against the limiting ring in the radial direction.

9. The water pump according to claim 8, characterized in that The water pump is also provided with a sealing ring, the pump head includes a body shell and an enclosure plate, the enclosure plate cover is arranged at the cavity opening of the fluid cavity, the fastening ring is arranged on the side of the enclosure plate away from the fluid cavity, the rotating shaft is passed through the enclosure plate and connected to the impeller, and the sealing ring is tightly clamped between the enclosure plate and the body shell; And / or, the fastening ring is provided with a water drainage gap, a water drainage opening is formed between the pump housing and the pump head, and the water drainage gap is communicated with the water drainage opening.

10. The water pump according to claim 7, characterized in that The rotating shaft and the connecting hole of the impeller are interference fit; And / or, the pump housing is provided with a magnetic component at the bottom of the receiving cavity, the rotating shaft passes through the rotor body, and is magnetically attracted to the magnetic component at the end away from the impeller.

11. The water pump according to any one of claims 7 to 10, characterized in that The outer circumference of the pump housing is provided with a plurality of fasteners, each of which has a buckle groove inside, and the outer circumference of the pump head is provided with a convex buckle, which is snap-fitted into the corresponding buckle groove; And / or, a glue injection seal is formed between the support seat and the pump housing.

12. A refrigeration device, characterized in that: Comprising a water pump as claimed in any one of claims 7 to 11.

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