CN219081904U

CN219081904U - Fan for motor and motor with same

Info

Publication number: CN219081904U
Application number: CN202223356196.7U
Authority: CN
Inventors: 程晨; 王小童
Original assignee: Shenzhen Leyuancheng Photoelectric Technology Co ltd
Current assignee: Shenzhen Leyuancheng Photoelectric Technology Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-26
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a fan for a motor and the motor with the same, wherein the fan comprises a wheel disc and fan blades fixedly connected to the wheel disc, a plurality of fan blades are distributed along the circumferential direction of the wheel disc, and the upper side and the lower side of a cross section pattern of each fan blade along the height direction are two parallel straight lines. The fan blade in this fan has adopted new structural design, the upper and lower both sides of cross-section figure of flabellum along the direction of height are two parallel straight lines, compare with the flabellum in prior art, under the condition of the same fan blade height, the air-out area between every adjacent two flabellum in this fan is bigger, to small-size motor, the air-out area positively correlates with the amount of wind, therefore, under the condition of the same wind speed, the amount of wind of this fan is bigger, the heat dispersion of motor is higher, can prolong the life of motor, improve user's experience sense. The motor of the utility model adopts the fan, so that the motor has at least all the beneficial effects brought by the fan.

Description

Fan for motor and motor with same

Technical Field

The utility model relates to the technical field of motors, in particular to a fan for a motor and the motor with the fan.

Background

The fan is a common part in small and medium-sized motors and can be used for radiating heat of the motors so as to prevent the motors from being damaged too early due to serious heat barrier. For small-sized household appliances such as blowers, the internal motor of the blower is mostly a hardware motor, and the fan in the traditional hardware motor is manufactured by a hardware shell and hardware blades. The manufacturing time of the hardware shell and the hardware fan blade is longer, and the processing cost is higher. In addition, as shown in fig. 1, in the conventional hardware fan blade design, the upper side and/or the lower side of the cross section pattern of the fan blade along the height direction is an arc line, and when the hardware fan blade is added, the thickness of the fan blade is at least 0.65mm under the influence of materials and processing technology. For a small motor, the fan blade structure often causes that the air outlet area between two fan blades is not large enough, the air quantity is insufficient, the motor still has serious heating phenomenon, the service life of the motor is influenced, and poor experience is brought to a user.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a fan for a motor, which can increase the air outlet area between two fan blades and the air quantity so as to improve the heat dissipation performance of the motor and the overall performance of the motor.

In order to solve the problems, the technical scheme adopted by the utility model is as follows: the utility model provides a fan for motor, includes rim plate and fixed connection in the flabellum of rim plate, the flabellum is followed the circumference distribution of rim plate has the multi-disc, the upper and lower both sides of the cross-section figure of flabellum along the direction of height are two parallel straight lines.

Compared with the prior art, the fan for the motor has at least the following beneficial effects: the fan blade in the fan adopts a new structural design, the upper side and the lower side of the cross section graph of the fan blade along the height direction are two parallel straight lines, the air outlet area between every two adjacent fan blades in the fan is larger under the condition of the same fan blade height, and the air outlet area is positively correlated with the air quantity for the small motor, so that the air quantity of the fan is larger under the condition of the same air speed, the heat radiation performance of the motor is higher, the service life of the motor can be prolonged, and the experience of a user is improved.

According to the fan for the motor, the wheel disc and the fan blades are made of plastic materials. The manufacturing time and the processing cost of the fan and the motor are greatly reduced, and the yield of products is improved.

In the fan for the motor, the minimum thickness of the fan blade is 0.38mm.

The utility model also provides a motor, which comprises a shell, a stator, a rotor and the fan, wherein the stator is fixedly arranged in the shell, the rotor is rotationally connected with the shell and is inserted into the stator, and the wheel disc is fixedly connected with the first end of the rotor. Because the motor of the utility model adopts the fan, the motor has at least all the beneficial effects brought by the fan.

In the motor, the shell is made of plastic materials. The whole manufacturing time and processing cost of the motor can be greatly reduced, and the yield of products can be improved.

According to the motor, the stator comprises a plurality of circumferentially distributed iron cores, and every two adjacent iron cores are welded and fixed.

According to the motor, the stator is connected with the shell through the buckle structure. The stator can be fixed better through the design, resonance noise can be reduced, and user experience is improved.

The motor comprises a rotor, a first bearing and a magnetic ring, wherein the first end of the rotor is rotationally connected with the shell through the first bearing, the magnetic ring is sleeved at the middle part of the rotor, and the magnetic ring is spliced in the stator.

According to the motor, the outer ring of the first bearing is fixedly connected with the casing, the first end of the rotating shaft is circumferentially fixed with the inner ring of the first bearing, and the rotating shaft can axially slide relative to the inner ring of the first bearing along the second end of the rotating shaft.

The motor further comprises a second bearing and a spring, wherein the outer ring of the second bearing is fixedly connected with the end cover, the second end of the rotating shaft is circumferentially fixed with the inner ring of the second bearing, the spring is sleeved at the second end of the rotating shaft, and two ends of the spring are respectively abutted against the second bearing and the magnetic ring.

The utility model is described in further detail below with reference to the drawings and the detailed description.

Drawings

FIG. 1 is a cross-sectional view of a fan blade in a height direction according to the prior art;

FIG. 2 is a schematic diagram showing the overall structure of a fan according to a first embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a fan blade along a height direction according to a first embodiment of the present utility model;

FIG. 4a is a schematic cross-sectional view of two adjacent blades along the height direction in a fan according to the prior art;

FIG. 4b is a schematic cross-sectional view of two adjacent blades along the height direction in the fan according to the first embodiment of the present utility model;

fig. 5 is a sectional view of a motor in a second embodiment of the utility model;

fig. 6 is a schematic structural diagram of a motor rotor in a second embodiment of the present utility model;

fig. 7 is a bottom view of the motor of fig. 5.

Reference numerals illustrate: 100-fan, 110-wheel disc, 111-fan blade, 200-casing, 210-buckle protruding, 220 limit structure, 300-stator, 310-iron core, 311-buckle recess, 400-rotor, 410-pivot, 420-first bearing, 430-magnetic ring, 440-second bearing, 450-spring.

Detailed Description

Embodiments of the present utility model are described in detail below:

example 1

As shown in fig. 1, fig. 1 shows a cross-sectional pattern of a fan blade in the prior art along the height direction, and it can be seen that the upper side and the lower side of the cross-sectional pattern are both arc lines, and in this fan blade structure, schematic cross-sectional views of two adjacent fan blades along the height direction are shown in fig. 4a, the area enclosed by the two adjacent fan blades is the cross-section of the air outlet area, and the size of the air outlet area can be measured by the size of the area.

Referring to fig. 2 and 3, in a first embodiment of the present utility model, a fan for a motor is provided, which includes a wheel disc 110 and fan blades 111 fixedly connected to the wheel disc 110, wherein the fan blades 111 are distributed with a plurality of fan blades along the circumferential direction of the wheel disc 110, and as shown in fig. 3, the upper and lower sides of a cross-sectional pattern of the fan blades 111 along the height direction are two parallel straight lines. In this fan blade 111 structure, a schematic cross-sectional view of two adjacent fan blades 111 along the height direction is shown in fig. 4 b. As can be seen from a comparison between fig. 4a and fig. 4b, in the case of the same fan blade height, the air outlet area between every two adjacent fan blades 111 in the fan 100 of the present embodiment is larger, and for a small-sized motor, the air outlet area is positively related to the air volume, so that the air volume of the fan 100 is larger, the heat dissipation performance of the motor is higher, the service life of the motor can be prolonged, and the experience of the user is improved.

Specifically, the wheel disc 110 and the fan blade 111 are made of plastic materials, and for conventional hardware fan blades, a five-axis processing system is required for processing and manufacturing, which has the advantages of long processing time, low efficiency, high cost and low yield. The wheel disc 110 and the fan blade 111 in this embodiment are made of plastic materials, and the plastic materials can be processed by injection molding, so that the yield is higher, the processing efficiency is higher, the material cost and the processing cost are lower, and the overall cost of the wheel disc 110 and the fan blade 111 is lower. It should be noted that, what is to be protected in the present utility model is the structure of the wheel 110 and the fan blade 111 made of plastic material, rather than the injection molding method of the wheel 110 and the fan blade 111. For the hardware fan blade, the thickness of the processed fan blade can be only 0.65mm at minimum, but in the utility model, because the fan blade 111 adopts a special structure and is made of plastic materials, the thickness of the fan blade 111 can be only 0.38mm at minimum, and the air inlet area and the air outlet area of the fan 100 are further increased, so that the whole air quantity of the fan 100 is increased. When the fan 100 is applied to a small-sized motor, higher heat dissipation performance can be provided to the motor, and the service life of the motor can be prolonged. In addition, the fan blade 111 structure is more convenient for demolding during injection molding, so that the fan blade 111 can be conveniently machined and molded, the machining efficiency is further improved, and the machining cost is reduced.

Example two

Referring to fig. 5, a second embodiment of the present utility model provides a motor, which includes a casing 200, a stator 300, a rotor 400, and the fan 100 in the first embodiment, wherein the stator 300 is fixedly installed in the casing 200, the rotor 400 is rotatably connected to the casing 200 and is inserted into the stator 300, and a wheel disc 110 in the fan 100 is fixedly connected to a first end of the rotor 400. Since the motor of the second embodiment employs the fan 100 of the first embodiment, the motor has at least all the advantages of the fan 100.

Specifically, the wheel plate 110 and the fan blades 111 of the fan 100 are both made of plastic materials, and the casing 200 of the motor is also made of plastic materials, so that the overall processing cost of the motor can be reduced, the overall manufacturing time of the motor can be greatly reduced, and the yield can be improved. As shown in fig. 7, the stator 300 is connected with the casing 200 through a fastening structure, and the fastening structure can better fix the stator 300 and the casing 200 together, so as to reduce resonance noise and improve user experience. Specifically, the stator 300 may be provided with a fastening groove 311, the casing 200 is provided with a fastening protrusion 210, the fastening groove 311 and the fastening protrusion 210 form a fastening structure in this embodiment, and when the stator is installed, the fastening groove 311 on the stator 300 is aligned with the fastening protrusion 210 in the casing 200, and the fastening protrusion 210 is fastened and connected with the fastening groove 311, so as to realize the fixed installation of the stator 300 and the casing 200. When the casing 200 is made of plastic material, the fastening protrusions 210 of the casing 200 have a certain deformability and restorability, so that they can be conveniently fastened into the fastening grooves 311 and maintain the fastened state in the absence of external force. To improve the mounting reliability and stability between the stator 300 and the casing 200, a plurality of snap structures may be provided in the circumferential direction.

Further, referring to fig. 5 and 6, the rotor 400 includes a rotation shaft 410, a first bearing 420 and a magnetic ring 430, wherein a first end of the rotation shaft 410 is rotatably connected to the casing 200 through the first bearing 420, the magnetic ring 430 is sleeved at the middle of the rotation shaft 410, and the magnetic ring 430 is inserted inside the stator 300. When the motor is operated, the magnetic ring 430 rotates with the rotation shaft 410 relative to the casing 200. Further, the outer ring of the first bearing 420 is fixedly connected to the casing 200, the first end of the rotating shaft 410 is circumferentially fixed to the inner ring of the first bearing 420, and the rotating shaft 410 can axially slide along the second end of the rotating shaft 410 relative to the inner ring of the first bearing 420. When the rotation shaft 410 rotates at a high speed, the rotation shaft 410 can slightly slide axially along the direction of the second end, so that the fatal problems of hard torsion, extrusion and the like caused by high-speed rotation are eliminated, and the service life of the motor is further prolonged.

Specifically, as shown in fig. 5 and 6, a limiting structure 220 is provided in the casing 200 near the first end of the rotating shaft 410 to limit the axial movement of the rotating shaft 410 along the first end. Specifically, the rotor 400 further includes a second bearing 440 and a spring 450, the outer ring of the second bearing 440 is fixedly connected to an end cap (not shown in the figure, may be a bearing end cap commonly used in the prior art), the second end of the rotating shaft 410 is circumferentially fixed to the inner ring of the second bearing 440, the spring 450 is sleeved on the second end of the rotating shaft 410, and two ends of the spring 450 respectively abut against the second bearing 440 and the magnetic ring 430. When the rotating shaft 410 rotates at a high speed, the spring 450 is pressed, the rotating shaft 410 can slightly slide axially along the direction of the second end, and the restoring force of the spring 450 can limit the sliding of the rotating shaft 410 axially along the second end, so that the rotating shaft 410 is always in a normal working position. Further, as shown in fig. 7, the stator 300 includes a plurality of circumferentially distributed iron cores 310, and each two adjacent iron cores 310 are welded and fixed. During processing, each iron core 310 may be wound individually, and after the winding of the plurality of iron cores 310 is completed, the plurality of iron cores 310 are welded and fixed, so as to finally obtain the stator 300 in this embodiment. Compared with the conventional iron core 310 integrally inserted with windings, the iron core 310 in this embodiment can greatly shorten the winding time and reduce the processing cost during manufacturing. Also, it should be noted that the present utility model is not limited to the manufacturing process of the stator 300, but the stator 300 is formed by welding and fixing a plurality of iron cores 310.

It should be noted that, in the description of the present utility model, if an azimuth or positional relationship is referred to, for example, upper, lower, front, rear, left, right, etc., the azimuth or positional relationship is based on the azimuth or positional relationship shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be configured or operated in a specific azimuth, and should not be construed as limiting the present utility model.

In the description of the present utility model, a plurality means one or more, and a plurality means two or more, and it is understood that greater than, less than, exceeding, etc. does not include the present number, and it is understood that greater than, less than, within, etc. include the present number. If any, first or second, etc. are described for the purpose of distinguishing between technical features only and not for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims

1. The utility model provides a fan for motor, its characterized in that includes rim plate (110) and fixed connection in flabellum (111) of rim plate (110), flabellum (111) are followed the circumference distribution of rim plate (110) has the multi-disc, the upper and lower both sides of cross-section figure along the direction of height of flabellum (111) are two parallel straight lines.

2. The fan for a motor according to claim 1, wherein the wheel (110) and the fan blades (111) are made of plastic material.

3. A fan for an electric motor according to claim 1 or 2, characterized in that the minimum thickness of the blades (111) is 0.38mm.

4. An electric machine, comprising a casing (200), a stator (300), a rotor (400) and a fan (100) according to any one of claims 1-3, wherein the stator (300) is fixedly mounted in the casing (200), the rotor (400) is rotatably connected with the casing (200) and is inserted into the stator (300), and the wheel disc (110) is fixedly connected with a first end of the rotor (400).

5. The electric machine according to claim 4, characterized in that the housing (200) is made of plastic material.

6. The electric machine according to claim 4 or 5, characterized in that the stator (300) comprises a plurality of circumferentially distributed cores (310), and that each two adjacent cores (310) are welded together.

7. The electric machine according to claim 4 or 5, characterized in that the stator (300) is connected to the housing (200) by means of a snap-fit structure.

8. The motor according to claim 4 or 5, wherein the rotor (400) includes a rotating shaft (410), a first bearing (420) and a magnetic ring (430), the first end of the rotating shaft (410) is rotatably connected to the casing (200) through the first bearing (420), the magnetic ring (430) is sleeved at the middle part of the rotating shaft (410), and the magnetic ring (430) is inserted inside the stator (300).

9. The electric machine of claim 8, wherein an outer race of the first bearing (420) is fixedly connected to the housing (200), a first end of the rotating shaft (410) is circumferentially fixed to an inner race of the first bearing (420), and the rotating shaft (410) is axially slidable relative to the inner race of the first bearing (420) along a second end of the rotating shaft (410).

10. The electric machine according to claim 9, wherein the rotor (400) further comprises a second bearing (440) and a spring (450), the outer ring of the second bearing (440) is fixedly connected to an end cap, the second end of the rotating shaft (410) is circumferentially fixed to the inner ring of the second bearing (440), the spring (450) is sleeved at the second end of the rotating shaft (410), and two ends of the spring (450) are respectively abutted against the second bearing (440) and the magnetic ring (430).