CN117353503A - Improve waterproof heat radiation structure, external rotor and motor of motor - Google Patents

Abstract

The invention discloses a heat radiation structure for improving motor water resistance, an outer rotor and a motor, and relates to the technical field of outer rotor motors, comprising a magnetic shoe fixing frame, wherein the magnetic shoe fixing frame comprises a frame body, a through hole arranged on the frame body, and a tray which is arranged corresponding to the through hole and used for receiving water and guiding flow; according to the invention, the through holes are formed in the frame body, so that hot air can flow, the heat dissipation effect is enhanced, meanwhile, the tray is arranged to catch and block the entered water and prevent the water from contacting the stator winding through diversion, the influence on the motor performance is avoided, and the water flows out through the inner wall of the rotor, so that the waterproof performance is enhanced, the requirements of heat dissipation and water prevention can be met, and the problem of poor waterproof performance caused by the opening of the bottom of the rotor is solved.

Description

Improve waterproof heat radiation structure, external rotor and motor of motor

Technical Field

The invention belongs to the technical field of external rotor motors, and particularly relates to a heat dissipation structure for improving motor water resistance, an external rotor and a motor.

Background

In the prior art, an outer rotor motor comprises an outer rotor and a stator, wherein the outer rotor comprises a magnetic shoe fixing frame, a rotor and a magnetic shoe; the existing external rotor motor generally realizes heat dissipation by arranging heat dissipation ribs and heat dissipation fins on a shell, so that the heat dissipation effect is not ideal, and the operation reliability and the service life of the motor are affected; the water cooling or oil cooling is adopted to radiate heat for the motor, and the structure cost is too high to be suitable for an outer rotor fan structure; in order to solve the problem of large temperature rise in the current industry, a large motor structure is generally used, and the larger the motor volume is acted on by the same loss, the lower the temperature is, but the larger the motor size is caused.

Experiments show that under the condition that the bottom of the rotor is not provided with holes, the temperature rise difference of the magnetic shoe rack is not large, and the heat dissipation effect of the holes on the bottom of the rotor on the magnetic shoe rack is proved to be great, but the holes on the bottom of the rotor can lead water to enter the stator winding to influence the IP level, namely, the problem that the waterproof performance is poor after the holes on the bottom of the rotor exist.

Disclosure of Invention

The invention aims to provide a heat radiation structure, an outer rotor and a motor for improving the waterproof performance of the motor, so as to solve the technical problems, wherein through holes are formed in a frame body, hot air can flow, the heat radiation effect is enhanced, a tray is arranged to catch and block water entering the motor and prevent the water from contacting a stator winding through diversion, the waterproof performance is enhanced, the requirements of heat radiation and waterproof are met, and the problem of poor waterproof performance caused by opening holes in the bottom of the rotor is solved.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the utility model provides an improve waterproof heat radiation structure of motor, includes the magnetic shoe mount, the magnetic shoe mount includes support body, sets up the through-hole on the support body, sets up and be used for receiving water and water conservancy diversion's tray with the through-hole is corresponding. The setting position of the tray corresponds to the rotor opening; the tray sets up a plurality of, wherein the through-hole sets up between the tray, wherein the extension of the both sides lines of tray all intersects with the centre of a circle of support body, sets up the through-hole on the support body, makes hot-blast can flow, strengthens the radiating effect, sets up the tray simultaneously to catch, block the water that gets into and make moisture contactless stator winding through the water conservancy diversion, flow through the rotor inner wall, strengthen waterproof performance, can satisfy heat dissipation and waterproof demand simultaneously, solve the problem that the waterproof performance is relatively poor because of rotor bottom trompil leads to.

Preferably, the circle center of the frame body is used as a center dot, the tray uses the center dot as the circle center, and the tray angle &1 is more than or equal to 30 degrees and less than or equal to 1 degrees and less than or equal to 45 degrees. Wherein, &1 is the angle of the tray alone.

Preferably, the tray has an upward slope &2 from one end close to the central axis of the frame body to the other end far from the central axis of the frame body, and the slope &2 satisfies 1 degree less than or equal to &2 degree less than or equal to 5 degrees.

Preferably, the round dots of the frame body are used as center round dots, a plurality of trays are arranged, the trays take the center round dots as circle centers, and the total angle of the plurality of trays is more than or equal to 60 degrees and less than or equal to 180 degrees.

Preferably, the support arm is arranged at the position where the through hole is formed in the frame body. Wherein the support arm sets up between the tray, and wherein the tray both sides all conflict and set up the support arm.

Preferably, the support arm is provided with a recess. Wherein one or more grooves are arranged, and a plurality of grooves can be arranged at equal intervals or at unequal intervals.

Preferably, the groove is provided with a length less than half of the length of the support arm; the recess is provided to a depth of between one fifth and one third of the height of the support arm. The arrangement of the grooves ensures that the structural strength of the frame body is met, and simultaneously, the hot air flow and heat dissipation are facilitated. The grooves are arranged to increase the surface heat dissipation area of the supporting arm, so that heat dissipation of the motor is facilitated.

Preferably, the vertical dimension of the support arm is greater than the vertical dimension of the tray. The two sides of the tray are in contact with one side face of the supporting arm, the supporting arm and the tray form a groove body for containing fluid, the bottom of the groove body is the tray, and the two side faces of the groove body are the side faces of the supporting arm.

Preferably, one end of the support arm is cut into an arc shape. Specifically, the support arm sets up the curved structure of section shape in outer ring one side, is favorable to the flow of hot-blast and the dissipation of heat.

Preferably, the support arm is provided in plurality; the plurality of supporting arms are arranged at equal intervals; or a plurality of support arms are arranged at unequal intervals, so that the strength of the heat dissipation structure is met, and the flow of hot air and the heat dissipation are facilitated.

Preferably, when the number of the support arms is N, the pole pair number of the rotor is P, the rotation speed is N, the slot number of the stator is Z, the number of the support arms satisfies n+.p+.z+.p. Armature rotation frequency f1=p×n/60, fan blade rotation frequency f2=n×n/60, motor electromagnetic noise frequency f=z×n×p/60, where n×p/60 is the electrical frequency of the motor, and f=z×n×p/60 is the electromagnetic noise frequency induced by the number of motor slots; the number of the supporting arms satisfies N not equal to P not equal to Z not equal to P so as to avoid the superposition influence of various noises.

Preferably, the frame body is provided with an inner ring and an outer ring. The inner ring is correspondingly arranged on the inner side of the outer ring, the axis of the inner ring is the same as that of the outer ring, one end of the tray is abutted against the outer ring, two ends of the supporting arm are respectively connected with the inner ring and the outer ring, the side face of the supporting arm is abutted against the tray, and the groove is formed in one side close to the inner ring.

Preferably, the height of the outer ring is H; the height difference H1 between the end face of the inner ring and the end face of the outer ring on the same side meets the following distance requirement that H1 is more than or equal to 0.15H and less than or equal to 0.27H.

Preferably, the outer ring is provided with a contact surface for contacting with the rotor; and the height H2 of the contact surface meets the condition that H2 is more than or equal to 0.3H by taking the height of the outer ring as H.

Preferably, the tray is provided with a boss structure for connecting the rotor. The boss structure comprises a column body arranged on the lower layer and connected with the tray, and a connecting end arranged above the column body, wherein the connecting end is Y-shaped.

An outer rotor comprising the heat dissipation structure.

A motor comprising said outer rotor.

The application achieves the beneficial technical effects that,

the invention relates to a heat radiation structure for improving motor water resistance, which comprises a magnetic shoe fixing frame, a heat radiation module and a heat radiation module, wherein the magnetic shoe fixing frame comprises a frame body, a through hole arranged on the frame body, and a tray which is arranged corresponding to the through hole and used for receiving water and guiding flow; set up the through-hole on the support body, make hot-blast can flow, strengthen the radiating effect, set up the tray simultaneously to catch, block the water that gets into and make moisture contactless stator winding through the water conservancy diversion, avoid influencing motor performance, moisture flows through the rotor inner wall, thereby strengthen waterproof performance, can satisfy heat dissipation and waterproof demand simultaneously, solve the problem that leads to waterproof performance relatively poor because of rotor bottom trompil.

Drawings

Fig. 1 is a schematic structural view of a magnetic shoe holder.

Fig. 2 is a schematic top view of the magnetic shoe holder.

Fig. 3 is a schematic view showing a structure in which a tray has a gradient.

Fig. 4 is a schematic cross-sectional view of the magnetic shoe holder.

Fig. 5 shows another arrangement of trays.

Fig. 6 is a schematic view of a structure of the motor with a rotor opening.

Fig. 7 is a schematic sectional view of the motor.

Fig. 8 is another schematic cross-sectional view of the motor.

Fig. 9 is a schematic structural diagram of the spring plate.

Fig. 10 is a schematic structural view of the waterproof ring.

Fig. 11 is a schematic view showing a connection structure of the boss and the rotor.

Fig. 12 is a schematic diagram showing the positional relationship between the tray and the stator winding.

Fig. 13 is a schematic diagram showing a positional relationship of the rotor opening projected on the tray.

Reference numerals: 1-a frame body; 2-through holes; 3-a tray; 4-supporting arms; 41-grooves; 5-an inner ring; 6-an outer ring; 61-contact surface; 7-a boss structure; 8-a rotor; 81-rotor opening; 82-shrapnel; 83-rotor shaft; 84-sleeve; 9-waterproof rings; 91-a drain tank; 92-a boss; 10-stator windings.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

The technical scheme of the invention is described in detail in the following by specific embodiments.

Referring to fig. 1 to 13, a heat dissipation structure for improving waterproof performance of a motor according to an embodiment of the present invention includes a magnetic shoe holder, the magnetic shoe holder includes a holder body 1, a through hole 2 disposed on the holder body 1, and a tray 3 disposed corresponding to the through hole 2 and used for receiving water and guiding flow. The trays 3 are provided with a plurality of through holes 2, wherein the through holes 2 are arranged between the trays, and the extension of the lines on the two sides of the trays 3 are intersected with the circle center of the frame body 1; the setting position of the tray corresponds to the position of the rotor opening; set up through-hole 2 on support body 1, make hot-blast can flow, reinforcing radiating effect sets up tray 3 simultaneously to catch, block the water that gets into from rotor trompil department and make moisture contactless stator winding through the water conservancy diversion, avoid influencing the motor performance, moisture flows through the rotor inner wall, thereby strengthen waterproof performance, can satisfy heat dissipation and waterproof demand simultaneously, solve the relatively poor problem of waterproof performance because of rotor bottom trompil leads to. Since the tray 3 is arranged to improve the waterproof performance, the size of the opening at the bottom of the rotor can be increased, and the larger opening is beneficial to heat dissipation of the motor, so that the heat dissipation performance of the motor is provided.

In one embodiment, the center of the circle of the frame body 1 is used as a center dot, the tray 3 uses the center dot as the center of the circle, and the angle &1 of the tray 3 is 30 degrees & lt 1 degrees & lt 45 degrees. Wherein, &1 is the angle of a single tray 3;

the angle &1 of the tray is set to meet the requirement of hot air flow and prevent water drops from entering the stator winding; setting a larger angle is not beneficial to the discharge of hot air flow from the bottom hole of the rotor, and too small an angle easily causes the inability to block water drops so as to drop to the stator winding; the tray is arranged at a position corresponding to the position of the rotor opening.

In one embodiment, the tray 3 has an upward slope &2 from one end close to the central axis of the frame body 1 to the other end far from the central axis of the frame body 1, and the slope &2 satisfies 1 degree less than or equal to &2 degree less than or equal to 5 degrees; specifically, a slope &2 exists from one end of the tray 3 close to the inner ring to the other end, and the slope &2 meets the best waterproof effect when the slope &2 is more than or equal to 1 degree and less than or equal to 5 degrees; the tray sets up slope &2, makes the abrupt slope that is blocked water and forms through slope &2 flow to rotor internal diameter department, then flows through the rotor inner wall, avoids water not drip stator winding, can lead to the motor short circuit to burn the machine because of the stator meets water, but the rotor because electrophoresis and powder spraying technology, water can't cause corrosion damage to the rotor to the water droplet has been solved and has been got into inside the motor, and can't influence the rotor because of the water droplet, blocks the back water conservancy diversion through the rotor inside to the water droplet, makes the water droplet discharge, thereby improves the waterproof performance of motor.

In one embodiment, the gradient range may be set to 5.ltoreq.2.ltoreq.15.

In one embodiment, the round dots of the frame body 1 are taken as center round dots, a plurality of trays 3 are arranged, the trays 3 take the center round dots as circle centers, and the total angle of the plurality of trays 3 is more than or equal to 60 degrees and less than or equal to 180 degrees. The total angle of the tray 3 is limited, and the tray 3 is arranged at a too large angle, so that hot air flow is not beneficial to being discharged from a hole at the bottom of the rotor, and water drops to the stator winding are easily caused by the too small angle; wherein the number of the trays 3 is related to the number of the rotor holes, the number is not more than 6, the angle size of each tray can be adjusted according to the position of the rotor bottom hole, the interval between the trays is not required to be uniform, and the positions of the trays 3 correspond to the positions of the rotor holes; the number of trays 3 is related to the number of rotor openings, and assuming that the radius of the holes is R, the distance from the periphery of the holes to the edges of the trays needs to be greater than 3R, and at the same time, the following requirements need to be met by the trays 3: the angle of each tray is more than 1, more than or equal to 30 degrees and less than or equal to 1 and less than or equal to 45 degrees, the number of the trays 3 is not more than 6 at most, and the number of the holes of the rotor can be determined while meeting the requirements.

In one embodiment, the frame body 1 is provided with a support arm 4 at the position where the through hole 2 is provided. Wherein the support arms 4 are arranged between the trays 3, wherein the support arms 4 are arranged on two sides of the tray 3 in a propping manner. The supporting arm 4 is arranged, the contact area between the magnetic shoe fixing frame and air is increased, the heat dissipation effect is improved, meanwhile, in the process of motor rotation, hot air is disturbed, the hot air is enabled to move, and the motor rotation accelerates the air flow, so that the heat dissipation effect is improved. The heat dissipation speed is higher by matching with the opening of the rotor, and the heat dissipation performance of the motor is improved.

In one embodiment, the tray 3 is one or both of a sector and an arch.

In one embodiment, as shown in fig. 5, the arrangement of the trays 3 is changed such that the side lines on two sides of the trays 3 are parallel to each other, wherein a plurality of trays 3 are arranged on the frame body 1, and support arms 4 are arranged between the trays 3.

In one of the embodiments, the support arm 4 is provided with a recess 41. Wherein the grooves 41 are provided in one or more, and may be provided in plural at equal intervals or at unequal intervals; wherein the recess 41 can be arranged in the direction in which the support arm 4 is arranged.

In one embodiment the set length may be greater than one half the length of the support arm 4 and less than three quarters of the length of the support arm 4. The grooves 41 are arranged to increase the surface heat dissipation area of the support arm 4, so that heat dissipation of the motor is facilitated; the grooves 41 are arranged, so that the contact area of the support arm and air is increased, the heat dissipation effect is improved, and meanwhile, as different height levels exist at one end of the support arm, the heat in the support arm can flow to the outside in the rotating process, and the heat dissipation effect is improved; grooves are formed in the supporting arms on the side of the eccentric inner ring 5 so that heat dissipation and hot air flow are facilitated.

In one embodiment, the recess 41 is provided with a length less than half the length of the support arm 4; the recess 41 is arranged to a depth of between one fifth of the height of the support arm 4 and one third of the height of the support arm 4. The arrangement of the grooves 41 ensures that the structural strength of the frame body 1 is met, and meanwhile, the flow of hot air and the heat dissipation are facilitated. The grooves 41 are arranged to increase the surface heat dissipation area of the support arm 4, so that heat dissipation of the motor is facilitated; the groove 41 is arranged, so that the contact area of the support arm and air is increased, the heat dissipation effect is improved, and meanwhile, the heat inside the rotating process flows to the outside due to different height levels at one end of the support arm, so that the heat dissipation effect is enhanced.

In one of the embodiments, the vertical dimension of the support arm 4 is greater than the vertical dimension of the tray 3. Wherein, two sides of the tray 3 are in contact with one side surface of the supporting arm 4, the supporting arm 4 and the tray 3 form a groove body for containing fluid, the bottom of the groove body is the tray 3, and two side surfaces of the groove body are side surfaces of the supporting arm 4; wherein the middle part of the tray 3 is provided with a supporting arm 4; the tray 3 can effectively guide water drops, so that the water drops are prevented from dripping from two sides, the controllability is improved, and the waterproof performance of the motor is enhanced.

In one embodiment, the support arm 4 has an arc-shaped cross-section at one end. Specifically, the support arm 4 is provided with a structure with a cut-off arc shape at one side of the outer ring 6, which is beneficial to the flow of hot air and the heat dissipation. Because one end is arc, the support arm 4 both ends form the difference in height, are favorable to giving off inside hot-blast at pivoted in-process, accelerate the gas flow to outside to improve the radiating effect.

In one embodiment, the support arm 4 is provided in plurality; the plurality of the supporting arms 4 are arranged at equal intervals; or a plurality of support arms 4 are arranged at unequal intervals, so that the strength of the heat dissipation structure is met, and the flow of hot air and the heat dissipation are facilitated; the support arms are arranged, the support arms 4 are arranged at the through holes 2, the contact area between the magnetic shoe rack and the air is increased, and therefore heat conduction is quickened, and heat dissipation performance is improved.

In one embodiment, when the number of the support arms 4 is N, the pole pair number of the rotor is P, the rotation speed is N, the number of slots of the stator is Z, the number of the support arms 4 satisfies n+.p+.z.p. Armature rotation frequency f1=p×n/60, fan blade rotation frequency f2=n×n/60, motor electromagnetic noise frequency f=z×n×p/60, where n×p/60 is the electrical frequency of the motor, and f=z×n×p/60 is the electromagnetic noise frequency induced by the number of motor slots; the number of the supporting arms satisfies N not equal to P not equal to Z not equal to P so as to avoid the superposition influence of various noises.

In one embodiment, the frame body 1 is provided with an inner ring 5 and an outer ring 6. The inner ring 5 is correspondingly arranged on the inner side of the outer ring 6, the axis of the inner ring 5 is the same as the axis of the outer ring 6, one end of the tray 3 is abutted against the outer ring 6, two ends of the supporting arm 4 are respectively connected with the inner ring 5 and the outer ring 6, the side surface of the supporting arm 4 is abutted against the tray 3, and the groove 41 is arranged on one side close to the inner ring 5; the outer ring 6 is in contact with the rotor, and a spacing part 10 is arranged between one end of the tray 3 and the inner ring 5, wherein the spacing part 10 is arranged to prevent the tail end of the tray from being too close to the center of the rotor shaft and prevent water from dripping into the stator winding from the round hole.

In one embodiment, the height of the outer ring 6 is H; the height difference H1 between the end face of the inner ring 5 and the end face of the outer ring 6 on the same side meets the following distance requirement that H1 is less than or equal to 0.15H and less than or equal to 0.27H. The tail end of the supporting arm connected with the outer circular ring is beneficial to form an arc-shaped structure, and the shape of the arc-shaped structure is more beneficial to fluid flow and heat dissipation.

In one of the embodiments, the outer ring 6 is provided with a contact surface 61 for contact with the rotor; the height H2 of the contact surface 61 satisfies H2 not less than 0.3H with the height of the outer ring 6 as H. The contact area of the magnetic shoe fixing frame and the rotor is increased, the heat of the rotor is transferred to the magnetic shoe fixing frame at maximum efficiency, and the supporting arm 4 of the magnetic shoe fixing frame is provided with a plurality of grooves 41 serving as radiating grooves for increasing the surface radiating area and facilitating the heat dissipation of the motor. Specifically, a rotor opening 81 is formed in the bottom of the rotor, the rotor opening 81 is arranged at the circumferential position of the groove 41, hot air can circulate and be discharged in the circumferential range in a state of forming the groove 41, and the heat dissipation capacity is increased by sacrificing part area; if the bottom surface of the rotor 8 is not grooved, the bottom surface of the rotor 8 is in contact with the rotor 8, the part is not in heat transfer with air, and the bottom surface of the rotor is in contact with air after the grooves 41 are formed, so that the surface heat dissipation area is increased, and the heat dissipation of the motor is facilitated.

In one of the embodiments, the tray 3 is provided with a boss 7 for connecting to the rotor. The boss structure 7 comprises a column body arranged on the lower layer and connected with the tray, and a connecting end arranged above the column body, wherein the connecting end is Y-shaped.

An outer rotor comprising a heat dissipating structure as described above.

An electric motor comprising a heat dissipating structure as described above. The motor comprises a motor body, a stator winding 10 and an outer rotor, wherein the stator winding 10 and the outer rotor are arranged on the motor body; the outer rotor comprises a rotor 8, magnetic shoes, elastic pieces 82 arranged between the magnetic shoes and a magnetic shoe fixing frame which is connected with the rotor 8 and fixes the magnetic shoes; the rotor opening 81 is arranged on the rotor 8, and the tray 3 is right below the rotor opening 81; the magnetic shoe fixing frame drives the magnetic shoe fixing frame to rotate in the rotating process of the outer rotor through fixing the rotor, so that the flow of hot air is improved in the rotating process of the outer rotor, and the heat dissipation performance of the structure is improved, wherein elastic pieces 82 are arranged between the magnetic shoes to enhance the fixing effect, the section shape of each elastic piece is in a w shape, the rotor shaft 83 is connected with the rotor 8 through a shaft sleeve 84, a waterproof ring 9 is arranged below the rotor 8, the waterproof ring 9 and the rotor 8 are coaxially arranged, and the waterproof ring 9 corresponds to the rotor opening 81, the tray 3 and the inner wall of the rotor 8 to form a water flow passage; a drain groove 91 for draining water is arranged on the waterproof ring 9; the water drainage groove 91 is arranged around the central shaft of the waterproof ring 9, and a protruding part 92 for preventing water from flowing to the center of the motor is arranged in the middle of the waterproof ring 9.

As shown in fig. 7, the stator winding 10 is aligned under the tray 3, the tray 3 receives water dropped from the rotor opening 81, the entered water flows to the inner diameter of the rotor 8 through the tray 3 having a slope, and then flows out through the inner wall of the rotor, the tray 3 blocks the stator winding 10 under in advance due to the tray 3 being provided, water is prevented from entering the stator winding 10, the water flows from the inner wall of the rotor 8 to the waterproof ring 9, the water flow is received by the water drainage groove 91 on the waterproof ring 9, and the water flow flows out to the outside through the water drainage groove 91.

The frame body 1 is provided with a round hole, in particular a round hole is arranged in the inner circular ring 5; wherein the circular aperture fits within the sleeve 84.

The technical scheme is suitable for all external rotor motors, through structural optimization, through holes 2 and supporting arms 4 are arranged, and when the motor dissipates heat, the problem of poor water resistance is solved through the arrangement of a tray 3. The purposes of heat dissipation, water resistance and motor efficiency improvement can be achieved.

For solving the motor heat dissipation problem, this technical scheme makes technological change through the magnetic shoe mount that fixed magnetic shoe in rotor bottom was used, structurally focus to the design of giving off strong attention to fluid heat dissipation, sets up support arm 4, wherein sets up recess 41 on the support arm 4, can play little fan radiating effect when the rotor rotates to strengthen the heat dissipation, satisfy the heat dissipation demand of current external rotor motor.

In order to solve the problem that the waterproof performance is poor because the rotor bottom trompil leads to, this technical scheme forms tray 3 through between the support arm 4 of magnetic shoe mount, the position that tray 3 set up corresponds with the rotor trompil, it is used for catching the water that flows in from the rotor bottom hole, water flows to rotor internal diameter department through abrupt slope design, finally flows through the rotor inner wall, reach the risk that water does not drip stator winding, the stator meets water and can lead to the motor short circuit to burn out, but the rotor is because electrophoresis and powder spraying technology, water can't cause the corruption to destroy the influence to the rotor. According to the technical scheme, the problem of poor water resistance caused by the fact that the bottom of the rotor is perforated is solved, the tray is arranged, the size of the bottom hole of the rotor is not limited any more, the larger perforated hole is beneficial to heat dissipation of a motor, the motor can reduce the resistance of a motor winding when the motor is cooled, and the effect of reducing copper loss is achieved; meanwhile, the problem that the whole size of the motor is large due to the fact that the motor is increased to solve the heat dissipation problem in the prior art is solved, and meanwhile the problem that the size is large due to the fact that the large motor structure is used to solve the heat dissipation problem in the prior art is avoided.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

The embodiments of the heat dissipation structure, the outer rotor and the motor for improving the waterproof performance of the motor provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the invention. It should be noted that it will be apparent to those skilled in the art that the present invention may be modified and adapted without departing from the principles of the present invention, and that such modifications and adaptations are intended to be within the scope of the appended claims.

Claims (10)

1. The utility model provides an improve waterproof heat radiation structure of motor, includes magnetic shoe mount, its characterized in that, magnetic shoe mount includes support body (1), sets up through-hole (2) on support body (1), sets up and is used for receiving water and water conservancy diversion tray (3) with through-hole (2) correspondence; the setting position of the tray (3) corresponds to the rotor opening;

the circle center of the frame body (1) is used as a center dot, the tray (3) uses the center dot as the circle center, and the angle &1 of the tray (3) is more than or equal to 30 degrees and less than or equal to 1 degrees and less than or equal to 45 degrees.

2. The heat radiation structure for improving waterproof property of motor according to claim 1, wherein the tray (3) has an upward slope &2 from one end close to the central axis of the frame body (1) to the other end far from the central axis of the frame body (1), and the slope &2 satisfies 1 degree.ltoreq.2.ltoreq.5 °.

3. The heat radiation structure for improving the waterproof property of a motor according to claim 1, wherein a plurality of trays (3) are provided, and a total angle of a plurality of trays (3) satisfies 60 ° -180 °.

4. The heat radiation structure for improving the waterproof performance of the motor according to claim 1, wherein the frame body (1) is provided with a supporting arm (4) at the position where the through hole (2) is arranged; the supporting arm (4) is provided with a groove (41); the length of the groove (41) is less than half of the length of the supporting arm (4); the depth of the groove (41) is between one fifth of the height of the supporting arm (4) and one third of the height of the supporting arm (4); the vertical dimension of the supporting arm (4) is larger than the vertical dimension of the tray (3).

5. The heat radiation structure for improving the water resistance of a motor according to claim 4, wherein the cut-away shape of one end of the support arm (4) is arc-shaped.

6. Heat dissipation structure improving the waterproofing of electric motors according to any one of claims 4 to 5, characterized in that said support arm (4) is provided in plurality; when the number of the supporting arms (4) is N, the pole pair number of the rotor is P, the slot number of the stator is Z, and the number of the supporting arms (4) satisfies N not equal to P not equal to Z not equal to P.

7. The heat radiation structure for improving the waterproof performance of the motor according to claim 1, wherein the frame body (1) is provided with an inner ring (5) and an outer ring (6); taking the height of the outer ring (6) as H; the height difference H1 between the end face of the inner ring (5) and the end face of the outer ring (6) on the same side meets the following distance requirement that H1 is more than or equal to 0.15H and less than or equal to 0.27H; the outer ring (6) is provided with a contact surface (61) which is contacted with the rotor; the height H2 of the contact surface (61) is H, wherein the height H of the outer ring (6) is H, and H2 is more than or equal to 0.3H.

8. The heat radiation structure for improving the water resistance of a motor according to claim 1, wherein the tray (3) is provided with a boss structure (7) for connecting with a rotor.

9. An outer rotor comprising the heat dissipating structure of claim 1.

10. A motor comprising the outer rotor of claim 9.