CN221767753U - Outer rotor motor, fan part and air conditioner - Google Patents

Abstract

The utility model discloses an outer rotor motor, a fan part and an air conditioner, wherein the outer rotor motor comprises: rotor subassembly, stator module and first bolster, rotor subassembly includes shell and pivot, be equipped with first excitation spare in the shell, the pivot is located the shell and with the shell rotates in step, the shell is equipped with uncovered opening, stator module includes the end cover and locates the second excitation spare of end cover, the end cover closing cap the uncovered opening just first excitation spare overcoat in the second excitation spare, be equipped with the centre bore in the second excitation spare, the pivot with be equipped with the cooperation bearing between the centre bore, first bolster is located the shell with between the end cover, first bolster is constructed compressive deformation. The outer rotor motor can slow down the impact between the shell and the end cover, thereby reducing the impact force born by the matched bearing.

Description

Outer rotor motor, fan part and air conditioner

Technical Field

The utility model relates to the technical field of motors, in particular to an outer rotor motor, a fan component and an air conditioner.

Background

In the related art, an external rotor motor includes a rotor, a stator and a mating bearing, and under some impact conditions, the rotor and the stator may collide to cause damage to the mating bearing.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides an external rotor motor which can slow down the impact between the shell and the end cover, thereby reducing the impact force born by the matched bearing.

An external rotor motor according to an embodiment of the present utility model includes: rotor subassembly, stator module and first bolster, rotor subassembly includes shell and pivot, be equipped with first excitation spare in the shell, the pivot is located the shell and with the shell rotates in step, the shell is equipped with uncovered opening, stator module includes the end cover and locates the second excitation spare of end cover, the end cover closing cap the uncovered opening just first excitation spare overcoat in the second excitation spare, be equipped with the centre bore in the second excitation spare, the pivot with be equipped with the cooperation bearing between the centre bore, first bolster is located the shell with between the end cover, first bolster is constructed compressive deformation.

According to the outer rotor motor provided by the embodiment of the utility model, the first buffer piece capable of being compressed and deformed is arranged to play a role in buffering between the shell and the end cover by utilizing the first buffer piece, so that under some impact working conditions, the first buffer piece can absorb impact to slow down the impact between the shell and the end cover, and further the impact force born by the matched bearing is reduced, so that the service life of the matched bearing is prolonged, and the first buffer piece can play a certain role in buffering when the fan part rotates.

According to the external rotor motor of some embodiments of the present utility model, the first buffer member is sleeved on the peripheral edge of the end cover and extends between the housing and the end cover.

According to the external rotor motor of some embodiments of the present utility model, the first buffer member includes a first portion and a second portion, the first portion is disposed between the housing and the end cover, the second portion is disposed on the first portion, a thickness of the first portion is smaller than a thickness of the second portion in an axial direction of the rotating shaft, and the second portion is located radially outside the housing.

According to the external rotor motor of some embodiments of the present utility model, the first buffer members are plural and are arranged at intervals along the circumferential direction of the housing.

According to the outer rotor motor of some embodiments of the present utility model, a position of the end cover opposite to the center hole is provided with a dodging groove.

According to an external rotor motor of some embodiments of the present utility model, a minimum distance between the escape groove and the rotation shaft is a first distance, and the first buffer member is configured such that there is a first buffer distance between the housing and the end cover; the first distance is greater than the first buffer distance.

According to some embodiments of the utility model, the stator assembly is provided with a shaft shoulder part extending into the central hole, and the matching bearing and the shaft shoulder part are oppositely arranged in the axial direction; the outer rotor motor further includes a second cushioning member disposed between the shoulder portion and the mating bearing and configured to be compressively deformable.

According to an external rotor motor of some embodiments of the present utility model, the first buffer is configured such that there is a first buffer distance between the housing and the end cover; the second dampener is configured such that there is a second dampening distance between the mating bearing and the shoulder, the first dampening distance being less than the second dampening distance.

According to the external rotor motor of some embodiments of the present utility model, in the axial direction of the rotating shaft, two sides of the shaft shoulder are provided with mating bearings, and the second buffer member is arranged between each mating bearing and the shaft shoulder.

According to an external rotor motor of some embodiments of the present utility model, the second buffer is formed as a wave washer.

According to the external rotor motor of some embodiments of the present utility model, the mating bearing includes an inner ring, an outer ring, and a rolling element, the rolling element is rotatably disposed between the inner ring and the outer ring, the inner ring is sleeved on the rotating shaft, and the outer ring is disposed on the stator.

The utility model also provides a fan component.

The fan component comprises a driving wind wheel and the outer rotor motor of any embodiment, wherein the rotating shaft is connected with the driving wind wheel.

According to some embodiments of the utility model, the driving wind wheel is a cross-flow wind wheel, and the outer rotor motor is connected to one axial end of the cross-flow wind wheel.

The utility model also provides an air conditioner.

An air conditioner according to an embodiment of the present utility model includes the blower unit according to any one of the above embodiments.

According to some embodiments of the present utility model, the air conditioner includes a fixing base, the driving wind wheel is a cross-flow wind wheel, one end of the cross-flow wind wheel is rotatably supported on the fixing base, and the other end of the cross-flow wind wheel is connected with the outer rotor motor; the minimum distance between the fixed seat and the cross flow wind wheel is a second distance; the stator assembly is provided with a shaft shoulder part extending into the central hole, and the matched bearing and the shaft shoulder part are oppositely arranged in the axial direction;

The outer rotor motor further includes a second buffer member disposed between the shoulder portion and the mating bearing and configured to be compressively deformable; the second dampener is configured such that there is a second dampening distance between the mating bearing and the shoulder, the second spacing being less than the second dampening distance.

The fan component and the air conditioner have the same advantages as the outer rotor motor in the prior art, and are not described in detail herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of an external rotor motor according to some embodiments of the utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a schematic view of an external rotor motor according to a first embodiment of the present utility model;

FIG. 4 is a top view of the outer rotor motor of FIG. 3;

fig. 5 is a schematic view of an external rotor motor according to a second embodiment of the present utility model;

FIG. 6 is a top view of the outer rotor motor of FIG. 5;

fig. 7 is a schematic view of an external rotor motor according to a third embodiment of the present utility model;

FIG. 8 is a top view of the outer rotor motor of FIG. 7;

Fig. 9 is a schematic view of an outer rotor motor according to a fourth embodiment of the present utility model;

FIG. 10 is a top view of the outer rotor motor of FIG. 9;

FIG. 11 is an assembly view of a blower assembly according to some embodiments of the utility model when installed in an air conditioner;

Fig. 12 is an enlarged view at B in fig. 11;

FIG. 13 is an assembly view of a blower assembly according to further embodiments of the utility model when installed in an air conditioner;

fig. 14 is an enlarged view at C in fig. 13.

Reference numerals:

A fan unit 100; a chassis 200;

An outer rotor motor 10; driving the wind wheel 20; a rubber member 201; a wind wheel shaft 30; a fixing base 40; an adjustment projection 50;

A rotor assembly 1; a housing 11; an open mouth 111; a rotating shaft 12; an axial direction X of the rotating shaft; a stator assembly 2; an end cap 21; the avoidance groove 211; a second excitation member 22; a central hole 221; a shaft shoulder 23; a mating bearing 3; a first buffer member 4; a first portion 41; a second portion 42; a first pitch d1; a second distance d2; and a second buffer 5.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

An external rotor motor 10 according to an embodiment of the present utility model is described below with reference to fig. 1 to 14.

An external rotor motor 10 according to an embodiment of the present utility model includes: a rotor assembly 1, a stator assembly 2 and a first buffer 4.

The rotor assembly 1 comprises a shell 11 and a rotating shaft 12, a first exciting element is arranged in the shell 11, the rotating shaft 12 is arranged in the shell 11 and rotates synchronously with the shell 11, the shell 11 is provided with an opening 111, the stator assembly 2 comprises an end cover 21 and a second exciting element 22 arranged on the end cover 21, the end cover 21 covers the opening 111 and the first exciting element is sleeved on the second exciting element 22, a central hole 221 is formed in the second exciting element 22, a matched bearing 3 is arranged between the rotating shaft 12 and the central hole 221, a first buffer element 4 is arranged between the shell 11 and the end cover 21, and the first buffer element 4 is configured to be compressively deformed.

Therefore, under some impact conditions, the first buffer member 4 can absorb impact to slow down the impact between the housing 11 and the end cover 21, so as to reduce the impact force born by the mating bearing 3, to prolong the service life of the mating bearing 3, and the first buffer member 4 can also play a certain role in buffering when the fan component 100 rotates.

As shown in fig. 1, for example, an external rotor motor 10 includes: a rotor assembly 1, a stator assembly 2 and a first buffer 4.

The rotor assembly 1 includes a rotating shaft 12 and a housing 11, where the rotating shaft 12 and the housing 11 cooperate to rotate synchronously, for example, the rotating shaft 12 is disposed through the housing 11 and fixedly connected to the housing 11, so that the rotating shaft 12 can drive the housing 11 to rotate synchronously, or the rotating shaft 12 can be directly fixed on the housing 11 to rotate synchronously.

The stator assembly 2 includes an end cover 21 and a second excitation member 22 provided on the end cover 21, the end cover 21 covers the opening 111 and the first excitation member is sleeved on the second excitation member 22, that is, the casing 11 is sleeved on the second excitation member 22, so as to protect the second excitation member 22 by using the casing 11.

Further, a mating bearing 3 is disposed between the rotating shaft 12 and the central hole 221, and the mating bearing 3 can be sleeved on the rotating shaft 12, so as to facilitate the relative rotation of the rotating shaft 12 and the second exciting member 22.

The first buffer member 4 is disposed between the housing 11 and the end cover 21, for example, the first buffer member 4 is sleeved on the second excitation member 22 to enhance structural stability of the first buffer member 4, and the first buffer member 4 is sandwiched between the housing 11 and the end cover 21 to space the housing 11 and the end cover 21 in an axial direction of the rotating shaft 12.

Thus, under some impact conditions, the housing 11 or the end cover 21 cannot directly strike when moving along the axial direction, namely, the relative movement of the rotor assembly 1 and the stator assembly 2 in the axial direction of the rotating shaft 12 is limited, so that the impact force born by the matched bearing 3 is reduced, and the service life of the matched bearing 3 is prolonged. The "first cushioning member 4" refers to a structure or substance having a cushioning and impact absorbing function, for example, the first cushioning member 4 may be a wave washer, or a rubber ring, or other structures, which are not limited herein.

In particular, the first buffer member 4 is configured to be compressively deformable, including elastic deformation and rigid deformation, without limitation, so that the impact between the housing 11 and the end cap 21 can be absorbed by the deformation of the first buffer member 4, thereby further reducing the impact force born by the mating bearing 3 to extend the service life of the mating bearing 3, and the first buffer member 4 can also play a role in buffering when the fan unit 100 rotates.

According to the outer rotor motor 10 of the embodiment of the utility model, the first buffer member 4 capable of being compressed and deformed is arranged to play a role in buffering between the shell 11 and the end cover 21 by utilizing the first buffer member 4, so that under some impact working conditions, the first buffer member 4 can absorb impact to slow down the impact between the shell 11 and the end cover 21, further the impact force born by the matched bearing 3 is reduced, the service life of the matched bearing 3 is prolonged, and the first buffer member 4 can play a role in buffering to a certain extent when the fan component 100 rotates.

In the first embodiment, as shown in fig. 3 and 4, the first cushioning member 4 is sleeved around the outer peripheral edge of the end cap 21 and extends between the housing 11 and the end cap 21.

That is, the first buffer member 4 is a ring member extending in the circumferential direction of the outer peripheral wall of the end cap 21 and being closed in the circumferential direction, so that the first buffer member 4 can realize a buffer effect at each position in the circumferential direction of the end cap 21, thereby enhancing the buffer effect of the first buffer member 4 and further reducing the impact to which the mating bearing 3 is subjected.

In some embodiments, as shown in fig. 2, the first buffer member 4 includes a first portion 41 and a second portion 42, the first portion 41 is disposed between the housing 11 and the end cover 21, the second portion 42 is disposed on the first portion 41, a thickness of the first portion 41 is smaller than a thickness of the second portion 42 in an axial direction of the rotating shaft 12, and the second portion 42 is located radially outside of the housing 11.

Therefore, a limit step can be formed at the joint of the first part 41 and the second part 42, so that the limit effect can be achieved on the outer shell 11 at the radial outer side of the outer shell 11, and when the outer rotor motor 10 receives the impact force intersecting with the axial direction of the rotating shaft 12, the second part 42 can absorb the impact force, thereby reducing the trend of the outer shell 11 moving towards the radial outer side and further protecting the outer rotor motor 10

In some embodiments, as shown in fig. 5-10, the first cushioning members 4 are plural and spaced apart along the circumference of the housing 11.

Therefore, by arranging the plurality of first buffer pieces 4, the first buffer pieces 4 with different sizes can be arranged according to the buffer requirements of the outer shell 11 at different positions in the circumferential direction, and the buffer effect of the first buffer pieces 4 is improved.

As shown in fig. 5 and 6, in the second embodiment, the first cushioning members 4 are provided in two, two first cushioning members 4 are opposed in the radial direction of the housing 11, so that the cost of the first cushioning members 4 can be reduced as compared with the case where the first cushioning members 4 are ring-shaped members while satisfying the cushioning effect of the first cushioning members 4 between the housing 11 and the end caps 21.

Or as shown in fig. 7 and 8, in the second embodiment, the first cushion members 4 are provided with three, three first cushion members 4 are distributed at 120-degree intervals in the circumferential direction of the housing 11, so that the setting cost of the first cushion members 4 can be reduced as compared with the setting manner in which the first cushion members 4 are ring-shaped members while satisfying the cushioning effect of the first cushion members 4 between the housing 11 and the end caps 21.

Or as shown in fig. 9 and 10, in the second embodiment, the first cushion members 4 are provided with four, four first cushion members 4 are distributed at 90-degree intervals in the circumferential direction of the housing 11, so that the setting cost of the first cushion members 4 can be reduced as compared with the setting manner in which the first cushion members 4 are ring-shaped members while satisfying the cushioning effect of the first cushion members 4 between the housing 11 and the end caps 21.

In some embodiments, as shown in fig. 1, the end cap 21 is provided with a relief groove 211 at a position facing the central hole 221.

Accordingly, by providing the escape groove 211, the axial end portion (e.g., the lower end in fig. 1) of the rotating shaft 12 can be escaped, thereby avoiding interference between the axial end portion of the rotating shaft 12 and the end cover 21 and reducing abnormal noise.

In some embodiments, as shown in fig. 1, the minimum distance between the escape groove 211 and the rotation shaft 12 is a first distance d1, and the first buffer member 4 is configured such that there is a first buffer distance between the housing 11 and the end cap 21; the first distance d1 is greater than the first buffer distance.

It should be noted that the "first buffer distance" includes, but is not limited to, the following cases: the first buffer distance refers to the deformable distance of the first buffer member 4 if the first buffer member 4 is always stopped against the housing 11, and refers to the deformable distance of the first buffer member 4 + if the first buffer member 4 is spaced apart from the housing 11

The first buffer 4 is spaced from the housing 11 by a distance.

The "first distance d1" refers to a distance between the escape groove 211 and the rotation shaft 12 measured in the case where the external rotor motor 10 is not subjected to external impact, that is, the first buffer member 4 is not elastically deformed or is elastically deformed by a small amount.

Therefore, by setting the first distance d1 to be larger than the first buffer distance, when the outer rotor motor 10 is impacted externally, the lower end of the rotating shaft 12 is not contacted with the bottom wall of the avoidance groove 211, the end cover 21 is contacted with the outer shell 11, so that the relative movement of the outer shell 11 and the end cover 21 in the axial direction is limited, the interference between the axial end part of the rotating shaft 12 and the end cover 21 can be avoided, and abnormal sound is reduced.

In the outer rotor motor 10 of any of the above embodiments, as shown in fig. 1, the stator assembly 2 is provided with a shaft shoulder 23 protruding into the center hole 221, and the mating bearing 3 and the shaft shoulder 23 are disposed opposite to each other in the axial direction; the external rotor motor 10 further comprises a second buffer 5, the second buffer 5 being arranged between the shaft shoulder 23 and the mating bearing 3 and the second buffer 5 being configured to be compressively deformable.

For example, the shaft shoulder 23 protrudes in the direction of the rotating shaft 12 at the inner wall of the center hole 221, and the mating bearing 3 and the shaft shoulder 23 are disposed opposite to each other in the axial direction so as to play a limiting role in the axial direction by the shaft shoulder 23 in line with the mating bearing 3.

The second buffer member 5 is disposed between the shaft shoulder 23 and the mating bearing 3, for example, the second buffer member 5 is also sleeved on the rotating shaft 12 to enhance structural stability of the second buffer member 5, and the second buffer member 5 is sandwiched between the shaft shoulder 23 and the mating bearing 3 to space the mating bearing 3 and the shaft shoulder 23 in an axial direction of the rotating shaft 12.

Thus, under some impact conditions, the matched bearing 3 does not directly impact the shaft shoulder 23 when moving along the axial direction, so that the matched bearing 3 is prevented from being impacted by the shaft shoulder 23 to damage the matched bearing 3, and the service life of the matched bearing 3 is prolonged. The "second cushioning member 5" refers to a structure or substance having a cushioning and impact absorbing function, for example, the second cushioning member 5 may be a wave washer, or a rubber ring, or other structures, which are not limited herein.

In particular, the second buffer member 5 is configured to be compressively deformable, including elastic deformation and rigid deformation, without limitation, so that the impact of the mating bearing 3 on the shoulder portion 23 can be absorbed by the deformation of the second buffer member 5, thereby further avoiding the impact of the mating bearing 3 and the shoulder portion 23 to damage the mating bearing 3, so as to prolong the service life of the mating bearing 3, and the second buffer member 5 can also play a role in buffering when the fan unit 100 rotates.

In some embodiments, the first dampener 4 is configured such that there is a first dampening distance between the housing 11 and the end cap 21, and the second dampener 5 is configured such that there is a second dampening distance between the mating bearing 3 and the shoulder 23, the first dampening distance being less than the second dampening distance.

It should be noted that the "first buffer distance" includes, but is not limited to, the following cases: the first buffer distance refers to the deformable distance of the first buffer member 4 if the first buffer member 4 is always stopped against the housing 11, and refers to the deformable distance of the first buffer member 4 + the separation distance between the first buffer member 4 and the housing 11 if the first buffer member 4 is spaced apart from the housing 11.

"Second buffer distance" includes, but is not limited to, the following: the second buffer distance refers to the deformable distance of the second buffer element 5 if the second buffer element 5 is always stopped against the shoulder 23 and the mating bearing 3, and the second buffer distance refers to the deformable distance of the second buffer element 5 + the distance between the second buffer element 5 and the shoulder 23 if the second buffer element 5 is arranged spaced apart from the shoulder 23.

Thus, by setting the first buffer distance smaller than the second buffer distance so that the end cap 21 and the housing 11 are brought into contact when the second buffer member 5 is not fully compressed when the external rotor motor 10 is subjected to an external impact, the relative movement of the housing 11 and the end cap 21 in the axial direction is restricted, and thus, the second buffer member 5 can be prevented from being excessively compressed, thereby playing a role of protecting the second buffer member 5 and the mating bearing 3.

In some embodiments, as shown in fig. 1, in the axial direction of the rotating shaft 12, the two sides of the shaft shoulder portion 23 are provided with mating bearings 3, and a second buffer member 5 is provided between each of the mating bearings 3 and the shaft shoulder portion 23.

From this, all be equipped with the cooperation bearing 3 through the both sides at shoulder 23 to the cooperation stability of reinforcing pivot 12 and stator, and every cooperation bearing 3 and shoulder 23 between the corresponding second bolster 5 of usable absorb play the cushioning effect, so, under some impact conditions, the impact of corresponding cooperation bearing 3 to shoulder 23 can be absorbed to second bolster 5, thereby avoid corresponding cooperation bearing 3 and shoulder 23 striking and damage cooperation bearing 3, in order to prolong the life of corresponding cooperation bearing 3, and second bolster 5 also can play certain cushioning effect when fan part 100 rotates.

In some embodiments, as shown in fig. 1, the second cushioning member 5 is formed as a wave washer.

The wave washer is also called a wave washer, and is a circular sheet with regular wave shape, and the second buffer piece 5 is constructed into a wave washer so as to improve the performance of buffering, impact resistance and the like while guaranteeing the buffering function, thereby being beneficial to prolonging the service life of the second buffer piece 5, and the wave washer has a simple structure and is easy to reduce the cost.

In some embodiments, the mating bearing 3 includes an inner ring, an outer ring, and rolling elements rotatably disposed between the inner ring and the outer ring, the inner ring being sleeved on the shaft 12, and the outer ring being disposed on the stator.

Therefore, the matching bearing 3 is formed into a deep groove ball bearing, at this time, the second buffer member 5 can provide a certain pretightening force for the matching bearing 3, and it is to be noted that the matching bearing 3 is a core component of the outer rotor motor 10, if the matching bearing 3 is damaged, the noise of the outer rotor motor 10 running will be increased, the user experience will be affected, and if the damage of the matching bearing 3 is aggravated, the motor may not rotate.

In the related art, there is generally a certain play (clearance) between the inner ring and the outer ring of the mating bearing 3, and if a certain pre-tightening force is not applied when the outer rotor motor 10 is mounted, the noise of the mating bearing 3 is relatively loud when the outer rotor motor 10 is operated.

In the utility model, the second buffer piece 5 can provide a certain pretightening force for the matched bearing 3, so that the noise of the matched bearing 3 when the external rotor motor 10 operates is reduced.

A specific embodiment of an external rotor motor 10 according to the present utility model is described below with reference to fig. 1:

As shown, the outer rotor motor 10 includes: a rotor assembly 1, a stator assembly 2, a first buffer 4 and a second buffer 5.

The rotor assembly 1 comprises a shell 11 and a rotating shaft 12, a first exciting element is arranged in the shell 11, the rotating shaft 12 is arranged in the shell 11 and rotates synchronously with the shell 11, the shell 11 is provided with an opening 111, the stator assembly 2 comprises an end cover 21 and a second exciting element 22 arranged on the end cover 21, the end cover 21 covers the opening 111 and the first exciting element is sleeved on the second exciting element 22, a central hole 221 is formed in the second exciting element 22, a matched bearing 3 is arranged between the rotating shaft 12 and the central hole 221, a first buffer element 4 is arranged between the shell 11 and the end cover 21, and the first buffer element 4 is configured to be compressively deformed.

The stator assembly 2 is provided with a shaft shoulder 23 extending into the central bore 221, the mating bearing 3 and the shaft shoulder 23 being axially opposed; the external rotor motor 10 further comprises a second buffer 5, the second buffer 5 being arranged between the shaft shoulder 23 and the mating bearing 3 and the second buffer 5 being configured to be compressively deformable.

Wherein, in the axial direction of the rotating shaft 12, two sides of the shaft shoulder part 23 are provided with matched bearings 3, a second buffer part 5 is arranged between each matched bearing 3 and the shaft shoulder part 23, and the second buffer part 5 is configured as a wave-shaped gasket.

In the axial direction of the rotary shaft 1211, the minimum distance between the escape groove 211 and the rotary shaft 12 is a first distance d1, the distance between the upper wave washer and the shoulder 23 in fig. 1 is d3, and the distance between the lower wave washer and the shoulder 23 is d4.

Preferably, in the present embodiment, d3=d4=2.0 mm, d1=1.3 mm, the thickness of the wave washer is 0.3mm, and the thickness of the first cushion member 4 is 3mm. Or the upper waveform pad and the lower waveform pad in fig. 2 can be selected to have different types (elastic force and thickness), and the values of d1, d2 and d3 can be adjusted according to actual needs, which is not limited herein.

Thus, the outer rotor motor 10 of the present utility model has at least the following advantages:

1. By adding the second buffer member 5 between the mating bearing 3 and the shaft shoulder portion 23, the mating bearing 3 can be protected from being stressed when the outer rotor motor 10 alone and the outer rotor motor 10 are installed on the air conditioner and impact force is encountered (such as transportation, falling and the like), and the mating bearing 3 is not damaged.

2. By adding the first buffer member 4 in the gap between the shell 11 and the end cover 21, the impact force born by the matched bearing 3 after the second buffer member 5 is completely flattened when the air conditioner is subjected to the rightward impact force is avoided, and therefore the damage to the matched bearing 3 is avoided.

3. By further carrying out the dimension chain design on d1-d3, the second buffer piece 5 is prevented from bearing the impact force after being completely flattened when the whole air conditioner is subjected to the impact force leftwards, and therefore the damage of the matched bearing 3 is avoided.

4. The technical scheme is simple, reliable and easy to realize, and has good effect in actual use.

As shown in fig. 3, the present utility model also proposes a blower assembly 100.

A fan assembly 100 according to an embodiment of the present utility model includes a driving rotor 20 and the external rotor motor 10 according to any of the above embodiments, and a rotating shaft 12 is connected to the driving rotor 20.

Therefore, when the outer rotor motor 10 works, namely, the rotating shaft 12 rotates, the rotating shaft 12 can drive the driving wind wheel 20 to synchronously rotate, and under some impact working conditions, the first and second buffer pieces 5 can absorb impact to slow down the impact between the shell 11 and the end cover 21, so that the impact force born by the matched bearing 3 is reduced, the service life of the matched bearing 3 is prolonged, and the first and second buffer pieces 5 can play a certain role in buffering when the fan component 100 rotates.

The fan assembly 100 may be applied to a radiator, an air conditioner, or other devices, and is not limited thereto.

In some embodiments, drive rotor 20 is a cross-flow rotor, and outer rotor motor 10 is connected at one axial end of the cross-flow rotor.

Therefore, the outer rotor motor 10 is connected to one axial end of the cross-flow wind wheel, so that the rotating shaft 12 can drive the cross-flow wind wheel to synchronously rotate, and as shown in the figure, the axial direction of the cross-flow wind wheel is the same as the axial direction of the rotating shaft 12, namely, the distribution direction of the outer rotor motor 10 and the cross-flow wind wheel is the same as the distribution direction of the matched bearing 3 and the buffer piece.

Thus, under some impact conditions, the first buffer member 4 can absorb impact to slow down the impact between the housing 11 and the end cover 21, so as to reduce the impact force born by the mating bearing 3, so as to prolong the service life of the mating bearing 3, and the first buffer member 4 can also play a certain role in buffering when the fan component 100 rotates.

The utility model also provides an air conditioner.

An air conditioner according to an embodiment of the present utility model includes the blower unit 100 according to any one of the above embodiments.

According to the air conditioner disclosed by the embodiment of the utility model, the outer rotor motor 10 of the fan component 100 is provided with the first buffer element 4 capable of being compressed and deformed so as to play a role in buffering between the shell 11 and the end cover 21 by using the first buffer element 4, so that under some impact working conditions, the first buffer element 4 can absorb impact to slow down the impact between the shell 11 and the end cover 21, further the impact force born by the matched bearing 3 is reduced, the service life of the matched bearing 3 is prolonged, and the first buffer element 4 can play a role in buffering to a certain extent when the fan component 100 rotates.

In some embodiments, as shown in fig. 11 and 13, the air conditioner includes a fixed seat 40, the driving wind wheel 20 is a cross-flow wind wheel, one end of the cross-flow wind wheel is rotatably supported on the fixed seat 40 and the other end is connected with the outer rotor motor 10; as shown in fig. 12 and 14, the minimum distance between the fixing base 40 and the cross-flow wind wheel is a second distance d2; the stator assembly 2 is provided with a shaft shoulder 23 extending into the central bore 221, the mating bearing 3 and the shaft shoulder 23 being axially opposed;

The outer rotor motor 10 further includes a second buffer 5, the second buffer 5 being provided between the shaft shoulder 23 and the mating bearing 3 and the second buffer 5 being configured to be compressively deformable; the second buffer 5 is configured such that there is a second buffer distance between the mating bearing 3 and the shoulder portion 23, and the second distance d2 is smaller than the second buffer distance.

For example, as shown in fig. 11 and 13, the air conditioner comprises a chassis 200, the chassis 200 is used for supporting and fastening the components of the evaporator, the cross-flow wind wheel, the external rotor motor 10, the electric control box, the air conditioner internal machine shell 11 and the like, the cross-flow wind wheel is arranged between the evaporator and the chassis 200, and the schematic structure of the external rotor motor 10 mounted on the chassis 200 is shown.

One axial end of the cross flow wind wheel is connected with a fixed seat 40 on the chassis 200 through a wind wheel shaft 30, wherein the fixed seat 40 can be a bearing seat, the other axial end of the fixed seat is connected with an outer rotor motor 10, the outer rotor motor 10 provides power for the cross flow wind wheel to drive the cross flow wind wheel to rotate, the cross flow wind wheel rotates to drive air to flow, and the air flows through an evaporator fin, exchanges heat with an evaporator and then is blown to a room to cool or heat the room.

It should be noted that the "second buffer distance" includes, but is not limited to, the following cases: the second damping distance refers to the deformation distance of the second damping member 5 if the damping member is initially terminated against the shoulder 23 and the mating bearing 3, and the second damping distance refers to the deformation distance of the second damping member 5 + the distance the second damping member 5 is spaced from the shoulder 23 if the damping member is spaced from the shoulder 23.

The "second distance d2" refers to the minimum distance between the fixing base 40 and the cross-flow rotor measured in the case where the external rotor motor 10 is not subjected to external impact, that is, in the case where neither the first buffer member 4 nor the second buffer member 5 is elastically deformed or the elastic deformation amount is small.

Thus, by setting the second distance d2 smaller than the first buffer distance, the second buffer 5 is not fully compressed to the first buffer distance in the case where the external rotor motor 10 receives an external impact. I.e. the second cushioning member 5 is not fully flattened, the housing 11 and the end cap 21 will be in pressing contact to avoid over-compression of the second cushioning member 5, thereby acting to protect the second cushioning member 5 and the mating bearing 3.

In some embodiments, as shown in fig. 11-14, an adjusting protrusion 50 is provided on the fixing base 40 or the cross-flow rotor, and the adjusting protrusion 50 is used to adjust the minimum distance (second distance d 2) between the fixing base 40 and the cross-flow rotor.

For example, as shown in fig. 11 and 12, the adjusting protrusion 50 is disposed at a side of the fixing base 40 facing the through-flow wind wheel, or as shown in fig. 13 and 14, the adjusting protrusion 50 is disposed at a side of the through-flow wind wheel facing the fixing base 40, so that the adjustment of the minimum distance (second distance d 2) between the fixing base 40 and the through-flow wind wheel can be achieved by changing the thickness of the adjusting protrusion 50.

It should be noted that, when the air conditioner is impacted to the right (e.g. right in fig. 11), the first buffer member 4 and the second buffer member 5 can buffer and absorb the energy to protect the matching bearing 3. When the complete machine is subjected to the impact force to the left (left side in fig. 11), the second buffer piece 5 is deformed first, the rotor assembly 1 and the cross flow wind wheel are displaced to the left together, the second interval d2 is smaller than the first buffer distance by design, the left side of the cross flow wind wheel is contacted with the fixing seat 40 before the second buffer piece 5 is completely flattened, so that the second buffer piece 5 is prevented from being further compressed, and the matched bearing 3 is prevented from being damaged, therefore, the minimum interval (the second interval d 2) between the fixing seat 40 and the cross flow wind wheel needs to be designed to be a reasonable value to meet the requirement.

Thus, in the present utility model, the adjustment protrusion 50 is provided on the fixing base 40 or the cross wind wheel for adjusting the minimum distance (second distance d 2) between the fixing base 40 and the cross wind wheel, and preferably, in the present utility model, the thickness of the adjustment protrusion 50 is 2mm. Of course, the thickness of the adjusting protrusion 50 may be other values, which are not limited herein.

In some embodiments, as shown in fig. 11 and 13, a rubber member 201 is further provided between the end of the cross-flow wind wheel facing the outer rotor motor 10 and the rotating shaft 12, for absorbing impact force between the cross-flow wind wheel and the rotating shaft 12.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. An external rotor motor, comprising:

The rotor assembly comprises a shell and a rotating shaft, a first excitation piece is arranged in the shell, the rotating shaft is arranged on the shell and rotates synchronously with the shell, and the shell is provided with an opening;

The stator assembly comprises an end cover and a second excitation piece arranged on the end cover, the end cover covers the open port, the first excitation piece is sleeved outside the second excitation piece, a central hole is formed in the second excitation piece, and a matched bearing is arranged between the rotating shaft and the central hole;

a first cushioning member disposed between the housing and the end cap, the first cushioning member configured to be compressively deformable.

2. The external rotor motor of claim 1, wherein the first buffer is sleeved around the outer peripheral edge of the end cover and extends between the housing and the end cover.

3. The external rotor motor according to claim 1, wherein the first buffer member includes a first portion provided between the housing and the end cover, and a second portion provided at the first portion, the thickness of the first portion being smaller than the thickness of the second portion in the axial direction of the rotating shaft, the second portion being located radially outside of the housing.

4. The external rotor motor of claim 1, wherein the first buffer members are plural and are arranged at intervals along the circumferential direction of the housing.

5. The external rotor motor according to claim 1, wherein the end cover is provided with a dodging groove at a position opposite to the central hole.

6. The external rotor motor according to claim 5, wherein a minimum distance between the escape groove and the rotation shaft is a first distance, and the first buffer is configured such that there is a first buffer distance between the housing and the end cover; the first distance is greater than the first buffer distance.

7. The external rotor motor according to any one of claims 1 to 6, wherein the stator assembly is provided with a shoulder portion protruding into the center hole, the mating bearing and the shoulder portion being disposed opposite each other in an axial direction;

The outer rotor motor further includes a second cushioning member disposed between the shoulder portion and the mating bearing and configured to be compressively deformable.

8. The external rotor motor of claim 7, wherein the first buffer is configured such that there is a first buffer distance between the housing and the end cap;

The second dampener is configured such that there is a second dampening distance between the mating bearing and the shoulder, the first dampening distance being less than the second dampening distance.

9. The external rotor motor according to claim 8, wherein in an axial direction of the rotating shaft, both sides of the shaft shoulder portion are provided with mating bearings, and the second buffer member is provided between each of the mating bearings and the shaft shoulder portion.

10. The external rotor motor according to claim 7, wherein the second buffer is formed as a wave washer.

11. The external rotor motor according to claim 7, wherein the mating bearing includes an inner ring, an outer ring, and rolling elements rotatably disposed between the inner ring and the outer ring, the inner ring being externally fitted to the rotating shaft, the outer ring being disposed to the stator.

12. A fan assembly comprising a drive rotor and an external rotor motor according to any one of claims 1-11, the shaft being connected to the drive rotor.

13. The fan assembly of claim 12 wherein the drive rotor is a cross-flow rotor and the outer rotor motor is connected to one axial end of the cross-flow rotor.

14. An air conditioner comprising the blower unit according to claim 12 or 13.

15. The air conditioner of claim 14, wherein the air conditioner comprises a fixed seat, the driving wind wheel is a cross-flow wind wheel, one end of the cross-flow wind wheel is rotatably supported on the fixed seat, and the other end of the cross-flow wind wheel is connected with the outer rotor motor; the minimum distance between the fixed seat and the cross flow wind wheel is a second distance;

The stator assembly is provided with a shaft shoulder part extending into the central hole, and the matched bearing and the shaft shoulder part are oppositely arranged in the axial direction;

The outer rotor motor further includes a second buffer member disposed between the shoulder portion and the mating bearing and configured to be compressively deformable;

The second dampener is configured such that there is a second dampening distance between the mating bearing and the shoulder, the second spacing being less than the second dampening distance.