CN218733610U

CN218733610U - Brushless motor

Info

Publication number: CN218733610U
Application number: CN202222958749.XU
Authority: CN
Inventors: 尹凌飞; 崔治友
Original assignee: Suzhou Runhao Motor Co ltd
Current assignee: Suzhou Runhao Motor Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-03-24
Anticipated expiration: 2032-11-04

Abstract

The utility model discloses a brushless motor, include: a housing; the rotating shaft is rotatably arranged in the shell along the axial direction of the shell; the stator is fixedly arranged in the shell, and an accommodating space is formed between the stator and the shell; the rotor is fixedly arranged on the rotating shaft and is arranged in the accommodating space; the fixed impeller is fixedly arranged on the shell along the axial direction of the shell; wherein, the shell is provided with an air inlet, the stator is provided with a first air outlet, a first air duct is formed between the air inlet and the first air outlet, A ventilation hole is formed between the machine shell and the fixed impeller along the axial direction of the machine shell and is formed in the first air channel. The utility model discloses in limited inner space, realize being favorable to improving brushless motor's power to the cooling of stator and rotor to reform transform comparatively simply, the effect is comparatively showing, is favorable to promoting and uses, has very high practical value.

Description

Brushless motor

Technical Field

The utility model belongs to the technical field of brushless DC motor, concretely relates to brushless motor.

Background

The market demand of the existing hand-held dust collector is miniaturization and portability; with the application of the small-sized brushless high-speed motor, the external dimension of the dust collector is gradually reduced, the dimension of the motor is correspondingly reduced, and when the dimension of the motor is reduced to a certain degree, the internal structure dimension is limited. Because the stator and the rotor of the motor are very small in size, the heat generated by the motor winding cannot be effectively dissipated, and the heat dissipation effect of the motor is poor, the power of the motor cannot be effectively improved, and finally the suction force of the dust collector cannot meet the requirements of customers.

Therefore, in view of the above technical problems, it is necessary to provide a brushless motor.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a brushless motor.

In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:

a brushless motor, comprising:

a housing;

the rotating shaft is rotatably arranged in the machine shell along the axial direction of the machine shell;

the stator is fixedly arranged in the shell, and an accommodating space is formed between the stator and the shell;

the rotor is fixedly arranged on the rotating shaft and is arranged in the accommodating space;

the fixed impeller is fixedly arranged on the shell along the axial direction of the shell;

wherein, the shell is provided with an air inlet, the stator is provided with a first air outlet, a first air duct is formed between the air inlet and the first air outlet, A ventilation hole is formed between the machine shell and the fixed impeller along the axial direction of the machine shell, and the ventilation hole is formed in the first air channel.

In one embodiment, the vent hole includes a first through hole and a second through hole communicated with the first through hole, the casing is provided with a first groove communicated with the first through hole, the fixed impeller is provided with a second groove, and the first groove and the second groove are enclosed to form the second through hole.

In one embodiment, the casing includes a first casing and a second casing sleeved on the first casing, and the air inlet is disposed on the second casing.

In one embodiment, the first housing includes an outer housing, an inner housing, and a first guide vane connecting the outer housing and the inner housing.

In an embodiment, the inner shell includes a main body portion, the main body portion is fixedly installed in the outer shell through the first guide vane, and a plurality of first through holes are formed in the main body portion.

In an embodiment, the inner housing further includes a first extension portion, and the first extension portion is disposed at an end portion of the main body portion close to the fixed impeller along the axial direction of the housing.

In an embodiment, a first groove communicated with the first through hole is axially arranged on the first extending portion along the housing.

In one embodiment, the fixed impeller comprises an impeller shell and a protruding portion, the impeller shell is provided with a second guide vane, and the protruding portion is arranged at the end portion, far away from the stator, of the impeller shell along the axial direction of the shell.

In one embodiment, the protruding portion is provided with a plurality of second grooves.

In one embodiment, the outer shell, the inner shell, and the first guide vane enclose to form a plurality of second air outlets, and a second air duct is formed between the air inlet and the second air outlets.

The utility model discloses following beneficial effect has:

the utility model provides a brushless motor, this brushless motor is through being formed with the ventilation hole between fixed impeller and the casing to make outside low-temperature gas flow out from the first air outlet after entering first wind channel through the ventilation hole from the air intake, avoid the heat to concentrate on stator and rotor, cool down brushless motor, prevent the high temperature, be favorable to improving brushless motor's power, and then improve the efficiency of product, and promote user experience and feel;

the utility model discloses in limited inner space, realize the cooling to stator and rotor, can realize reducing of brushless motor volume to reform transform comparatively simply, the effect is comparatively showing, is favorable to promoting and uses, has very high practical value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a brushless motor according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a housing according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of the housing according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a fixed impeller according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a fixed impeller according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of the casing and the fixed impeller according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of this application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, and are only for the convenience of description of the present invention and simplification of description, but do not indicate or imply that the equipment or element which is referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", and the like as used herein do not particularly refer to the order or sequence, and do not limit the present disclosure, but only distinguish the components or operations described in the same technical terms.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The technical solution of the present invention will be described below with reference to the accompanying drawings.

Referring to fig. 1, a brushless motor according to an embodiment of the present invention includes a housing 1; the rotating shaft 2 is rotatably arranged in the machine shell 1 along the axial direction of the machine shell 1; the stator 3, the stator 3 is fixedly mounted in the chassis 1, form the accommodating space between chassis 1 and the stator 3; the rotor 4 is fixedly arranged on the rotating shaft 2 and is arranged in the accommodating space; the fixed impeller 5 is fixedly arranged on the machine shell 1 along the axial direction of the machine shell 1; wherein, be equipped with the air intake on the casing 1, be equipped with first air outlet on the stator 3, be formed with first wind channel between air intake and the first air outlet, be formed with the ventilation hole along casing 1 axial between casing 1 and the stator blade 5, the ventilation hole is located in the first wind channel.

It should be noted that, the accommodating space in this embodiment may be communicated with the air inlet and the first air outlet, when the brushless motor rotates at a high speed, one end of the stator 3, which is far away from the stator impeller 5, forms a low-pressure environment, so as to drive the air near the air inlet to enter the brushless motor from the air inlet and flow through the air vent to enter the accommodating space, and after passing through the stator 3 and the rotor 4, the air flows out from the first air outlet, and the low-temperature air cools the stator 3 and the rotor 4, thereby improving the heat dissipation capability of the brushless motor, being beneficial to improving the power of the brushless motor, and further improving the suction force of the dust collector.

Specifically, the vent hole in this embodiment includes a first through hole 11211 and a second through hole communicated with the first through hole 11211, a first through hole 11211 is provided on the casing 1, a first groove 11221 communicated with the first through hole 11211 is provided on the casing 1, a second groove 521 is provided on the stator vane wheel 5, and the first groove 11221 and the second groove 521 surround to form the second through hole. Through enclosing at stator 5 and casing 1 and closing and form the ventilation hole, low temperature gas flows through stator 5 and casing 1, also can play the cooling effect to stator 5 and casing 1, improves brushless motor's heat-sinking capability.

Referring to fig. 6, the casing 1 in this embodiment includes a first casing 11 and a second casing 12 sleeved on the first casing 11, and the air inlet is disposed on the second casing 12. The second housing 12 and the first housing 11 form an installation space for accommodating the movable impeller 6, the movable impeller 6 is driven to rotate along the rotating shaft 2, so that a low-temperature environment is formed in the installation space, gas enters the brushless motor from the air inlet, the components inside the brushless motor can be maximally cooled, and the heat dissipation capability of the brushless motor is improved.

Further, referring to fig. 2, the first casing 11 of the present embodiment includes an outer casing 111, an inner casing 112, and a first guide vane 113 connecting the outer casing 111 and the inner casing 112. Wherein the outer shell 111 is installed in interference fit with the second shell 12, so that the reliability of fixing the first shell 11 and the second shell 12 is stronger; the inner case 112 is fixedly mounted to the stator 5. According to the design, the first shell 11, the second shell 12, the stator impeller 5, the stator 3, the rotor 4 and other parts can be assembled more stably, reliably and conveniently.

Specifically, referring to fig. 3, the inner shell 112 in the present embodiment includes a main body portion 1121, the main body portion 1121 is fixedly installed in the outer shell 111 through a first guide vane 113, and a plurality of first through holes 11211 (see fig. 2) are formed on the main body portion 1121. The first through hole 11211 is configured such that the side of the main body portion 1121 facing the air inlet is initially converted from the originally closed state to the communicated state. When the impeller 5 is not mounted, the main body portion 1121 communicates with the air inlet through the first vent hole. According to the design, the low-temperature gas can enter the accommodating space, and the components such as the stator 3 and the rotor 4 can be cooled.

As shown in fig. 3, the inner housing 112 in this embodiment further includes a first extending portion 1122, and the first extending portion 1122 is provided at an end portion of the main body portion 1121 close to the fixed impeller 5 in the axial direction of the casing 1. The first extension portion 1122 partially protrudes from the outer housing 111 for engaging with the stator blade wheel 5, so that the stator blade wheel 5 is more stably and reliably mounted on the casing 1.

Further, the first extending portion 1122 in this embodiment is provided with a first groove 11221 (see fig. 2) communicated with the first through hole 11211 along the axial direction of the casing 1. Because the fixed impeller 5 is provided with the mounting post, the first extending portion 1122 can be prevented from interfering with the mounting post, and meanwhile, the fixed impeller 5 can be more stably and reliably fixed and mounted on the casing 1, and the mounting post on the fixed impeller 5 is fixedly clamped in the mounting slot, so that the fixed impeller 5 and the inner casing 112 can be prevented from changing positions when the rotating shaft 2 moves. Meanwhile, the design of the groove can be matched with the fixed impeller 5 to form a ventilation hole for ventilation and heat dissipation.

Referring to fig. 3, the inner housing 112 in this embodiment further includes a second extending portion 1123, and the second extending portion 1123 is disposed on an end portion of the main body portion 1121, which is far away from the fixed impeller 5, along the axial direction of the casing 1. The second extension 1123 is designed such that the rotating shaft 2 penetrates the inner housing 112, and one end thereof is fixedly mounted to the stator impeller 5, and the other end thereof is fixedly mounted to the stator 3, the rotor 4, and the like of the motor, and the stator 3, the rotor 4, and the like are accommodated in the second extension 1123.

Referring to fig. 5, the fixed impeller 5 in the present embodiment includes an impeller shell 51 and a protruding portion 52, the impeller shell 51 is provided with a second guide vane 511, and the protruding portion 52 is disposed at an end of the impeller shell 51 away from the stator 3 along the axial direction of the casing 1. According to the design, the impeller shell 51 can be matched with the inner shell 112 in a clamping mode, so that the fixed impeller 5 is fixedly installed on the first shell 11, the contact area between the fixed impeller 5 and the machine shell 1 can be increased due to the design of the protruding portion 52, the contact area is increased, the fixation between the fixed impeller 5 and the machine shell 1 is favorably enhanced, and the fixed impeller 5 is effectively prevented from falling off from the shell when the rotating shaft 2 rotates.

Specifically, the protruding portion 52 in the present embodiment is provided with a plurality of second grooves 521 (see fig. 4). Accordingly, the first through hole 11211 may be formed by matching with the first groove 11221 of the first extending portion 1122, and the first through hole 11211 is communicated with the second through hole of the inner housing 112, so that the accommodating space provided with the stator 3 and the rotor 4 is communicated with the air inlet, thereby facilitating heat dissipation of the brushless motor.

In addition, referring to fig. 1, in the present embodiment, the outer shell 111, the inner shell 112, and the first guide vane 113 enclose and form a plurality of second air outlets 7, and a second air duct is formed between the air inlet and the second air outlets 7. According to the design, when brushless motor during operation, movable vane 6 rotates and gets into brushless motor from the air intake in order to drive outside low temperature gas to flow through first casing 11 and second casing 12 through second air outlet 7, flow through stator 3 surface at last, stator 3's heat is taken away to the accessible this mode, cools down the processing to brushless motor, improves brushless motor's cooling ability, is favorable to improving brushless motor's power.

According to the technical scheme provided by the utility model, the utility model discloses following beneficial effect has:

the utility model provides a brushless motor, this brushless motor is through being formed with the ventilation hole between fixed impeller and the casing to make outside low-temperature gas flow out from the first air outlet after the air intake gets into first wind channel through the ventilation hole, avoid the heat to concentrate on stator and rotor, cool down brushless motor, prevent the high temperature, be favorable to improving brushless motor's power, and then improve the efficiency of product, and promote user experience and feel;

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A brushless motor, comprising:

a housing;

the rotating shaft is rotatably arranged in the shell along the axial direction of the shell;

wherein, the shell is provided with an air inlet, the stator is provided with a first air outlet, a first air duct is formed between the air inlet and the first air outlet, A ventilation hole is formed between the machine shell and the fixed impeller along the axial direction of the machine shell and is formed in the first air channel.

2. The brushless motor of claim 1, wherein the ventilation hole comprises a first through hole and a second through hole communicated with the first through hole, the housing has a first groove communicated with the first through hole, the stator vane wheel has a second groove, and the first groove and the second groove enclose to form the second through hole.

3. The brushless motor of claim 1, wherein the housing comprises a first housing and a second housing sleeved on the first housing, and the air inlet is disposed on the second housing.

4. The brushless electric machine of claim 3, wherein the first housing comprises an outer housing, an inner housing, and a first guide vane connecting the outer housing and the inner housing.

5. The brushless electric machine of claim 4, wherein the inner housing includes a main body portion, the main body portion is fixedly installed in the outer housing through the first guide vane, and the main body portion is provided with a plurality of first through holes.

6. The brushless electric machine of claim 5, wherein the inner housing further comprises a first extension portion disposed at an end of the main body portion near the stator impeller in an axial direction of the housing.

7. The brushless electric machine of claim 6, wherein the first extension portion is provided with a first groove communicating with the first through hole along an axial direction of the housing.

8. The brushless electric machine of claim 1, wherein the stator impeller includes an impeller housing having a second guide vane thereon and a boss provided at an end of the impeller housing away from the stator in a housing axial direction.

9. The brushless electric machine of claim 8, wherein the protruding portion has a plurality of second grooves.

10. The brushless motor of claim 4, wherein the outer housing, the inner housing, and the first guide vane enclose a plurality of second air outlets, and a second air duct is formed between the air inlet and the second air outlets.