CN220791537U

CN220791537U - Fan and vehicle

Info

Publication number: CN220791537U
Application number: CN202322384132.6U
Authority: CN
Inventors: 龚本凤; 吴贤明; 郭孝臣; 胡谦; 刘光
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-04-16
Anticipated expiration: 2033-08-30

Abstract

The utility model provides a fan and a vehicle, wherein the fan comprises a motor, a bearing, a fan body and a connecting piece; the motor comprises an output shaft, and a bearing is used for supporting the output shaft; the connecting piece is connected with the fan body, and the connecting piece cover is located on the output shaft, and one side of connecting piece is provided with drive portion, and at least part drive portion is to bearing direction protrusion and with the bearing butt to make the connecting piece rotate along with the output shaft is synchronous, and then drive fan body synchronous rotation and form the wind. Compared with the prior art, the fan changes the original power transmission mode, the bearing can also play a role in axially limiting the connecting piece while transmitting power, a limiting structure on one side of the connecting piece can be omitted, the number of parts required by a connecting part is reduced, and correspondingly, the mounting position of the limiting structure is not required to be reserved on the output shaft, so that the axial length of the output shaft can be reduced to a certain extent, and the overall thickness and occupied space of the fan are reduced.

Description

Fan and vehicle

Technical Field

The utility model relates to the technical field of electric fan design, in particular to a fan and a vehicle.

Background

The fan generally comprises a fan body structure and a motor structure for driving the fan body to rotate, wherein the motor comprises a shell, a stator assembly, a rotor assembly and the like, the stator assembly is relatively fixed with the shell, the rotor assembly is arranged inside the stator assembly and rotates relative to the stator assembly under the action of an electromagnetic field, and an output shaft in the rotor assembly is connected with the fan body so as to drive the fan body to rotate to form wind.

In the prior art, the fan body is connected with the output shaft in the following way: the fan body is sleeved on the output shaft and is fixed by the pin shaft so as to avoid the fan body rotating relative to the output shaft. Limiting parts such as snap springs are arranged on two sides of the pin shaft, grooves for installing the snap springs are correspondingly formed in the outer peripheral surface of the output shaft, the snap springs are clamped in the grooves and tightly fit with the outer side surface of the fan body, glue is injected into the grooves to fix the snap springs, and therefore axial limiting of the fan body on the output shaft is achieved through the snap springs, and axial movement of the fan body relative to the output shaft is avoided.

However, in the above manner, the number of parts required by the connection part between the fan and the output shaft is large, and the installation positions of the pin shaft and the snap spring are required to be reserved in the axial direction of the output shaft, so that the overall thickness of the fan along the axial direction of the output shaft is thicker, the occupied space is larger, and the installation and fixation of the fan on products such as vehicles are not facilitated.

Disclosure of Invention

In view of the above, the present utility model provides a fan and a vehicle, which at least solve the problems of thicker thickness and larger occupied space of the existing fan.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a fan, which comprises a motor, a bearing, a fan body and a connecting piece, wherein the motor is arranged on the bearing;

the motor comprises an output shaft, and the bearing is used for supporting the output shaft;

the fan comprises a fan body, a connecting piece, a bearing, a transmission part, a bearing, a fan connecting piece and an output shaft, wherein the fan body is connected with the fan body, the connecting piece is sleeved on the output shaft, the transmission part is arranged on one side of the connecting piece, and at least part of the transmission part protrudes towards the bearing and is abutted to the bearing, so that the connecting piece synchronously rotates along with the output shaft.

Optionally, the motor is an inner rotor motor, the inner ring of the bearing rotates synchronously with the output shaft, and the transmission part is abutted with the inner ring of the bearing.

Optionally, the motor is an external rotor motor, the outer ring of the bearing rotates relative to the output shaft, and the transmission part is abutted with the outer ring of the bearing.

Optionally, the transmission part and the connecting piece are in an integrally formed structure, and the connecting piece extends along the axial direction of the connecting piece to form the transmission part.

Optionally, the transmission part comprises an annular boss or at least two protrusions arranged at intervals.

Optionally, the fan further comprises a limiting piece;

the limiting piece is sleeved at the end part of the output shaft and is positioned at one side of the connecting piece away from the transmission part; the limiting piece is abutted with the connecting piece and used for pressing and fixing the connecting piece.

Optionally, along the axial direction of the output shaft, a surface of the limiting piece, which is far away from one side of the connecting piece, does not exceed a surface of the fan body.

Optionally, the limiting part is a nut, an external thread is arranged on the output shaft, and the nut is in threaded fit with the external thread.

Optionally, the fan further comprises a clamp spring, and the output shaft is provided with a clamping groove which is positioned at one side of the bearing away from the connecting piece;

the clamp spring is clamped in the clamping groove and is abutted with the bearing.

Optionally, the output shaft includes a first connection portion and a second connection portion;

the connecting piece is sleeved on the first connecting part, and the bearing sleeve is sleeved on the second connecting part; the first connecting portion is smaller in size than the second connecting portion in the radial direction of the output shaft.

Optionally, the first connecting part is provided with a first milling flat surface, and the inner wall of the connecting piece is provided with a second milling flat surface; the first milling flat surface is attached to the second milling flat surface.

Optionally, the fan body is provided with a containing groove, and the connecting piece is embedded in the containing groove;

the outer peripheral surface of the connecting piece and the inner peripheral surface of the accommodating groove are of polygonal structures, and the outer peripheral surface of the connecting piece is mutually attached to the inner peripheral surface of the accommodating groove; or, the outer peripheral surface of the connecting piece is provided with a first limit structure, the inner peripheral surface of the accommodating groove is provided with a second limit structure, and the first limit structure and the second limit structure are mutually matched.

Optionally, the first limiting structure is a tooth-shaped structure which is uniformly distributed, and the second limiting structure is a tooth-groove structure which is uniformly distributed.

Optionally, the connecting piece and the fan body are of an integrally formed structure.

The utility model also provides a vehicle comprising the fan according to any one of the preceding claims.

Compared with the prior art, the fan and the vehicle have the following advantages:

the fan comprises a motor, a bearing, a fan body and a connecting piece; the motor comprises an output shaft, and a bearing is used for supporting the output shaft; the connecting piece is connected with the fan body, and the connecting piece cover is located on the output shaft, and one side of connecting piece is provided with drive portion, and at least part drive portion is to bearing direction protrusion and with the bearing butt to make the connecting piece rotate along with the output shaft is synchronous, and then drive fan body synchronous rotation and form the wind. In the prior art, a fan body is fixed on an output shaft through a pin shaft, a motor output shaft rotates to drive the fan body to rotate, namely power is directly transmitted to the fan body from the output shaft, the fan is fixed on the output shaft through a connecting piece, one side of the connecting piece is provided with a transmission part, the transmission part is abutted with a bearing to realize power transmission, namely the power is transmitted to the bearing from the output shaft, then transmitted to the transmission part of the connecting piece from the bearing, and then the connecting piece drives the fan body to rotate. Compared with the prior art, the fan structure changes the original power transmission mode, and the bearing can play a role in axially limiting the connecting piece while transmitting power, so that the limiting structure on one side of the connecting piece can be omitted, the number of parts required by a connecting part is reduced, correspondingly, the mounting position of the limiting structure is not required to be reserved on the output shaft, the axial length of the output shaft can be reduced to a certain extent, the overall thickness of the fan is reduced, the occupied space of the fan is reduced, and the fan is mounted and fixed in a small space.

The vehicle of the present utility model has the same or similar advantages over the prior art as the fan described above and will not be described in detail herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a cross-sectional view of a fan structure in the present embodiment;

FIG. 2 is a cross-sectional view of a fan body according to the present embodiment;

FIG. 3 is a partial cross-sectional view of a fan structure in the present embodiment;

fig. 4 is a structural exploded view of a motor in the present embodiment;

FIG. 5 is a cross-sectional view of a coupling member coupled to an inner race of a bearing according to this embodiment;

FIG. 6 is a cross-sectional view of a coupling member coupled to a bearing outer race in this embodiment;

fig. 7 is a sectional view of an output shaft in the present embodiment;

fig. 8 is a cross-sectional view of a connector structure in this embodiment.

Reference numerals illustrate:

the motor comprises a motor body, a 10-output shaft, a 101-clamping groove, a 102-first connecting part, a 103-second connecting part, a 11-bearing, a 111-bearing inner ring, a 112-bearing outer ring, a 12-shell, a 13-cover plate, a 14-stator assembly, a 15-rotor assembly, a 2-fan body, a 20-accommodating groove, a 3-connecting piece, a 30-transmission part, a 31-second milling flat surface, a 32-tooth-shaped structure, a 4-limiting piece and a 5-clamp spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present utility model may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

It should be appreciated that reference throughout this specification to "one embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present utility model. Thus, the appearances of the phrase "in one embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The following describes in detail a fan and a vehicle provided by the present utility model by listing specific embodiments.

Referring to fig. 1 and 2, the present utility model provides a fan including a motor 1, a bearing 11, a fan body 2 and a connection member 3; the motor 1 comprises an output shaft 10, the bearing 11 being for supporting the output shaft 10; the connecting piece 3 is connected with the fan body 2, the connecting piece 3 is sleeved on the output shaft 10, a transmission part 30 is arranged on one side of the connecting piece 3, and at least part of the transmission part 30 protrudes towards the direction of the bearing 11 and is abutted to the bearing 11, so that the connecting piece 3 rotates synchronously with the output shaft 10.

Specifically, as shown in fig. 1 and 2, the fan includes a motor 1, a bearing 11, a fan body 2 and a connecting piece 3, the motor 1 includes an output shaft 10, the bearing 11 is used for supporting the output shaft 10, the bearing 11 includes a bearing inner ring and a bearing outer ring, the bearing inner ring is sleeved on the output shaft 10, the bearing outer ring is sleeved on the bearing inner ring, the motor 1 can convert electric energy into mechanical energy according to the law of electromagnetic induction, the output forms of power of different motor types are different, if the motor 1 is an inner rotor motor, the bearing outer ring is kept stationary, the output shaft 10 drives the bearing inner ring to rotate to provide power output, if the motor 1 is an outer rotor motor, the output shaft 10 and the bearing inner ring are kept stationary, and the bearing outer ring rotates relative to the bearing inner ring to provide power output. The fan blades are arranged on the fan body 2, the connecting piece 3 and the fan body 2 are connected together, and the fan body 2 and the connecting piece 3 and the fan body 2 can be connected together through an injection molding process, an assembly process and the like, so that a connection relation which can not rotate relatively is formed between the connecting piece 3 and the fan body 2, and the connecting piece 3 can drive the fan body 2 to rotate. The connecting piece 3 can be a metal piece manufactured by adopting the processes of powder metallurgy and the like, and has better strength and rigidity. The connecting piece 3 is sleeved on the output shaft 10, one side of the connecting piece 3 is provided with a transmission part 30, at least part of the transmission part 30 protrudes towards the bearing 11 and is abutted against the bearing 11, the transmission part 30 can be an independent component and fixedly connected with the connecting piece 3, the transmission part 30 can also be a part of a structure on the connecting piece 3, and the transmission part is formed by processing the connecting piece 3 through a stretching process, an injection molding process and the like. The transmission part 30 is abutted with the bearing 11, specifically, the transmission part 30 is abutted with a part of the bearing 11 for power output, that is, if the motor 1 is an inner rotor motor, the transmission part 30 is abutted with an inner ring of the bearing, and if the motor 1 is an outer rotor motor, the transmission part 30 is abutted with an outer ring of the bearing, so that the transmission part 30 can drive the connecting piece 3 to synchronously rotate along with the output shaft 10, and further drive the fan body 2 to synchronously rotate to form wind. Meanwhile, the connecting piece 3 and the output shaft 10 are in clearance fit, so that abnormal sound caused by tiny vibration generated in the rotation process of the fan body 2 is reduced. In a preferred embodiment, in order to improve the reliability of synchronous rotation of the connecting piece 3 along with the output shaft 10, an elastic bulge structure can be arranged on the surface of the output shaft 10, the inner wall of the connecting piece 3 is provided with a groove structure, the elastic bulge structure can be multiple, the groove structure can also be multiple, and an elastic bulge is embedded in each groove to realize effective matching of the output shaft 10 and the connecting piece 3, and the circumferential limiting effect is achieved in the process of rotating the connecting piece 3 along with the output shaft 10, so that the consistency of the connecting piece 3 along with the rotation of the output shaft 10 is ensured.

In the prior art, a fan body 2 is fixed on an output shaft 10 through a pin shaft, an output shaft 10 of a motor 1 rotates to drive the fan body 2 to rotate, namely power is directly transmitted to the fan body 2 from the output shaft 10, the fan is fixed on the output shaft 10 through a connecting piece 3, one side of the connecting piece 3 is provided with a transmission part 30, the transmission part 30 is abutted with a bearing 11 to realize power transmission, namely, the power is transmitted to the bearing 11 from the output shaft 10, then transmitted to the transmission part 30 of the connecting piece 3 from the bearing 11, and then the fan body 2 is driven to rotate by the connecting piece 3. Compared with the prior art, the fan structure changes the original power transmission mode, and the bearing 11 can play a role in axially limiting the connecting piece 3 while transmitting power, so that the limiting structure on one side of the connecting piece 3 can be omitted, the number of parts required by a connecting part is reduced, correspondingly, the mounting position of the limiting structure is not required to be reserved on the output shaft 10, the axial length of the output shaft 10 can be reduced to a certain extent, the overall thickness of the fan is reduced, the occupied space of the fan is reduced, and the fan is mounted and fixed in a small space.

Alternatively, referring to fig. 4 and 5, the motor 1 is an inner rotor motor, the inner ring of the bearing 11 rotates synchronously with the output shaft 10, and the transmission part 30 abuts against the inner ring of the bearing 11.

Specifically, as shown in fig. 4 and 5, the inner rotor motor 1 includes a housing 12, a cover plate 13, a stator assembly 14, a rotor assembly 15, and the like, the stator assembly 14 and the rotor assembly 15 are disposed in the housing 12, and the housing 12 is capped with the cover plate 13 to form a complete motor structure. The stator assembly 14 is composed of a stator core, windings wound by enamelled wires, a frame, a wiring structure and the like, wherein the frame is of a cylindrical structure, the outer side of the frame is fixedly connected with the shell 12, the inner side of the frame is provided with the core and the windings, and the windings are communicated with an external alternating current power supply and can form a magnetic field after being electrified. The rotor assembly 15 is disposed in the stator assembly 14 and comprises a rotor body and an output shaft 10, the rotor body is generally a cage-shaped column structure wound with a plurality of wires, the column is connected with the output shaft 10, when the windings in the stator assembly 14 are electrified to form a rotating magnetic field, the rotor body starts to rotate in the formed rotating magnetic field and drives the output shaft 10 to synchronously rotate, so that the power output of the motor 1 is realized. As shown in fig. 5, the bearing 11 is sleeved on the output shaft 10, and during the process of providing power output by the motor 1, the bearing inner ring 111 rotates synchronously with the output shaft, the bearing outer ring 112 keeps static, the transmission part 30 on the connecting piece 3 abuts against the bearing inner ring 111, so that the output shaft 10 drives the connecting piece 3 to rotate synchronously based on the abutting relation between the bearing inner ring 111 and the transmission part 30, and further drives the fan body 2 to rotate synchronously to form wind.

Alternatively, referring to fig. 6, the motor 1 is an external rotor motor, the outer ring of the bearing rotates relative to the output shaft, and the transmission part abuts against the outer ring of the bearing.

Specifically, the motor 1 is an outer rotor motor, the working principle of the outer rotor motor is similar to that of an inner rotor motor, the difference is that a rotor assembly of the outer rotor motor is arranged outside a stator assembly, the stator assembly comprises an output shaft 10 and a stator winding sleeved on the output shaft 10, a rotating magnetic field is formed after the stator winding is electrified, a rotor body starts to rotate relative to the output shaft 10 and the stator winding, as shown in fig. 6, a bearing 11 is sleeved on the output shaft 10, in the process of providing power output by the motor 1, a bearing inner ring 111 and the output shaft 10 are kept stationary, a bearing outer ring 112 rotates relative to the bearing inner ring 111 and the output shaft 10, a transmission part 30 on a connecting piece 3 is abutted against the bearing outer ring 112, and accordingly the bearing outer ring 112 drives the connecting piece 3 to synchronously rotate through the transmission part 30, and further drives the fan body 2 to synchronously rotate to form wind.

Alternatively, the transmission part 30 and the connecting piece 3 are integrally formed, and the connecting piece 3 extends along the axial direction to form the transmission part 30.

Specifically, the transmission part 30 and the connecting piece 3 can be processed into an integrated structure through a stretching process, an injection molding process and the like, and the connecting piece 3 axially extends to form the transmission part 30, so that the processing mode of the fan can be effectively simplified, and the design difficulty of the fan is reduced.

Optionally, the transmission portion 30 includes an annular boss or at least two spaced apart protrusions.

Specifically, in one embodiment, the transmission portion 30 may be configured as an annular boss, and if the motor 1 is an inner rotor motor 1, the outer diameter of the annular boss does not exceed the outer diameter of the inner ring of the bearing 11, and if the motor 1 is an outer rotor motor 1, the inner diameter of the annular boss is larger than the outer diameter of the inner ring of the bearing 11, so as to ensure that the annular boss is only abutted against the power transmission portion of the bearing 11. In another embodiment, the transmission portion 30 includes at least two protrusions disposed at intervals, and the surfaces of the protrusions abutting the bearing 11 are flat to ensure a reliable abutting relationship. Preferably, at least two protrusions may be uniformly distributed along the circumference of the output shaft 10 to improve the stability of the transmission process.

Optionally, referring to fig. 1, the fan further includes a limiting member 4; the limiting piece 4 is sleeved at the end part of the output shaft 10 and is positioned at one side of the connecting piece 3 away from the transmission part 30; the limiting piece 4 is abutted with the connecting piece 3 and used for pressing and fixing the connecting piece 3.

Specifically, as shown in fig. 1, the fan further includes a limiting member 4, the limiting member 4 is sleeved at the end of the output shaft 10 and is located at one side of the connecting member 3 away from the transmission portion 30, the surface of the limiting member 4, which is close to one side of the connecting member 3, is abutted with the connecting member 3, so that an axial pressing force can be provided for the connecting member 3, and the connecting member 3 is pressed to be fully abutted with the bearing 11, thereby ensuring the reliability of power transmission.

Alternatively, referring to fig. 1, the surface of the stopper 4 on the side away from the connector 3 does not exceed the surface of the fan body 2.

Specifically, as shown in fig. 1, the surface of the side of the limiting piece 4 away from the connecting piece 3 does not exceed the surface of the fan body 2, so that the end of the output shaft 10 does not exceed the surface of the fan body 2, thereby further controlling the overall thickness of the fan and reducing the occupied space of the fan.

Optionally, the limiting part 4 is a nut, and the output shaft 10 is provided with external threads, and the nut is in threaded engagement with the external threads.

Specifically, the limiting member 4 is a nut, a thread is provided at the end of the output shaft 10, and the nut and the thread are screwed together to fix the limiting member 4 on the output shaft 10. If the fan body 2 rotates clockwise, the screw thread at the end of the output shaft 10 should be left-handed screw, the nut should also be left-handed screw, and if the fan body 2 rotates counterclockwise, the screw thread at the end of the output shaft 10 should be right-handed screw, and the nut should also be right-handed screw, so as to achieve smooth installation of the nut.

Optionally, referring to fig. 3, the fan further includes a clip spring 5, the output shaft 10 is provided with a clip groove 101, and the clip groove 101 is located on a side of the bearing 11 away from the connecting piece 3; the snap spring 5 is clamped in the clamping groove 101 and is abutted against the bearing 11.

Specifically, the fan further comprises a clamping spring 5, the clamping spring 5 can be formed by machining stainless steel or carbon spring steel and the like, a clamping groove 101 is formed in the output shaft 10, the clamping groove 101 is located on one side, far away from the connecting piece 3, of the bearing 11, the diameter of the clamping groove 101 is smaller than that of the output shaft 10, the clamping spring 5 is clamped in the clamping groove 101, the clamping groove 101 can play a good limiting function on the clamping spring 5, and the clamping spring 5 is prevented from being deviated. The jump ring 5 and the corner butt of connecting piece 3 one side are kept away from to bearing 11 play the spacing effect of axial to make the opposite side of bearing 11 fully with connecting piece 3 butt, improve power transmission's reliability, jump ring 5 also can play the elasticity cushioning effect to bearing 11 simultaneously, avoid hard collision to cause the damage of bearing 11. Under the long-term rotation of the output shaft 10, extrusion force is continuously generated between the bearing 11 and the clamp spring 5, the corner part of the bearing 11 can be set to be a round corner structure, axial and radial component force can be generated at the contact part of the bearing 11 and the clamp spring 5, the clamp spring 5 is prevented from falling off, meanwhile, the breakage of the clamp spring 5 caused by excessive force can be effectively avoided, and the service life of the clamp spring 5 is prolonged.

Alternatively, referring to fig. 7, the output shaft 10 includes a first connection part 102 and a second connection part 103; the connecting piece 3 is sleeved on the first connecting part 102, and the bearing 11 is sleeved on the second connecting part 103; the first connecting portion 102 is smaller in size than the second connecting portion 103 in the radial direction of the output shaft 10.

Specifically, as shown in fig. 7, the output shaft 10 includes a first connection portion 102 and a second connection portion 103, the first connection portion 102 and the second connection portion 103 are disposed adjacent to each other, the connection member 3 is sleeved on the first connection portion 102, and the bearing 11 is sleeved on the second connection portion 103. Along the radial direction of the output shaft 10, the size of the first connecting portion 102 is smaller than that of the second connecting portion 103, and the stepped structure formed by the first connecting portion 102 and the second connecting portion 103 can play a limiting role on the connecting piece 3, so that the pre-positioning before the connecting piece 3 is mounted is facilitated, and the mounting error of the connecting piece 3 is reduced. Of course, the radial dimension of the first connecting portion 102 along the output shaft 10 is not too small, so as to ensure structural rigidity of the output shaft 10, avoid fracture phenomenon in the rotation process of the output shaft 10, and preferably set the radial dimension of the first connecting portion 102 smaller than the radial dimension of the second connecting portion 103 by 1 mm-3 mm, so that not only can limit the connecting piece 3, but also structural rigidity of the output shaft 10 can be ensured.

Alternatively, referring to fig. 7 and 8, the first connecting portion 102 is provided with a first milled flat surface, and the inner wall of the connecting member 3 is provided with a second milled flat surface 31; the first milled flat surface is attached to the second milled flat surface 31.

Specifically, as shown in fig. 7 and 8, the first connection portion 102 on the output shaft 10 is provided with a first milling flat surface, the inner wall of the connecting piece 3 is provided with a second milling flat surface 31, the milling flat surface is a plane formed by milling flat technology, and the first milling flat surface and the second milling flat surface 31 are mutually attached, so that circumferential limitation of the output shaft 10 and the connecting piece 3 can be realized, and synchronous rotation of the connecting piece 3 along with the output shaft 10 is ensured. In order to enhance the limiting effect, the dimensions of the first milled surface and the second milled surface 31 may be set to be longer, and the specific dimensions are not limited in this embodiment. In a preferred embodiment, two first milling flat surfaces which are symmetrical to each other may be disposed on the first connection portion 102 of the output shaft 10, and two second milling flat surfaces 31 which are symmetrical to each other may be disposed on the inner wall of the connection member 3, so that uniform stress of the output shaft 10 and the connection member 3 may be achieved, and torque margin of the output shaft 10 transmitted to the connection member 3 may be increased. The milling process is simple, the structure of the processed output shaft 10 and the connecting piece 3 is also simpler, and the synchronous rotation of the connecting piece 3 along with the output shaft 10 can be realized through lower cost.

Optionally, referring to fig. 4, the fan body 2 is provided with a receiving groove 20, and the connecting piece 3 is embedded in the receiving groove 20; the outer circumferential surface of the connecting piece 3 and the inner circumferential surface of the accommodating groove 20 are of polygonal structures, and the outer circumferential surface of the connecting piece 3 and the inner circumferential surface of the accommodating groove 20 are mutually attached; or, the outer peripheral surface of the connecting piece 3 is provided with a first limit structure, the inner peripheral surface of the accommodating groove 20 is provided with a second limit structure, and the first limit structure and the second limit structure are mutually matched.

Specifically, as shown in fig. 4, the fan body 2 is provided with a housing groove 20, and the connector 3 is provided in the housing groove 20. In one embodiment, the outer peripheral surface of the connecting member 3 may be configured as a polygonal structure, and the inner peripheral surface of the accommodating groove 20 is also configured as a polygonal structure, including but not limited to an equilateral triangle structure, a square structure, a hexagonal structure, etc., and the outer peripheral surface of the connecting member 3 and the inner peripheral surface of the accommodating groove 20 are mutually attached to each other, so as to strengthen the connection relationship between the connecting member 3 and the fan body 2, so that the connecting member 3 can transmit a larger torque and a faster rotation speed, and improve the air outlet effect of the fan. In another embodiment, a first limiting structure may be disposed on the outer peripheral surface of the connecting member 3, and a second limiting structure may be disposed on the inner peripheral surface of the accommodating groove 20, where the first limiting structure and the second limiting structure may be a protrusion and a hole groove, or may be a form of clamping two connecting members, which is not limited in this embodiment. The first limit structure and the second limit structure are matched with each other, so that the connection relation between the connecting piece 3 and the fan body 2 is enhanced, and the fan body 2 is smoothly driven to rotate by the connecting piece 3.

Alternatively, referring to fig. 8, the first limiting structure is a tooth-shaped structure 32 that is uniformly distributed, and the second limiting structure is a tooth-slot structure that is uniformly distributed.

Specifically, as shown in fig. 8, the first limiting structure is a tooth-shaped structure 32 that is uniformly distributed, that is, the outer peripheral surface of the connecting piece 3 is a tooth-shaped structure 32 that is uniformly distributed, and the second limiting structure is a tooth-groove structure that is uniformly distributed, that is, the inner peripheral surface of the accommodating groove is a tooth-groove structure that is uniformly distributed, and the tooth-shaped structure 32 and the tooth-groove structure are engaged with each other, so as to realize reliable connection between the connecting piece 3 and the fan body 2. Preferably, the tooth surface of the tooth-shaped structure 32 is set to be a curved surface so as to realize uniform stress of the tooth-shaped structure 32 and the tooth groove structure in the rotation process, avoid the phenomenon of stress concentration and further improve the meshing reliability of the tooth-shaped structure 32 and the tooth groove structure.

Optionally, the connecting piece 3 and the fan body 2 are integrally formed.

Specifically, the connecting piece 3 and the fan body 2 can be processed into an integrated structure through an injection molding process, so that the connection reliability of the fan body 2 and the connecting piece 3 can be ensured, the output shaft 10 drives the fan body 2 to synchronously rotate through the connecting piece 3, the subsequent assembly process can be omitted, the assembly time of the integral structure of the fan is saved, and the production assembly efficiency of the fan is improved.

The utility model also provides a vehicle comprising a fan according to any of the preceding embodiments.

Specifically, the vehicle comprises the fan of any one of the embodiments, the overall thickness of the fan is thinner, the occupied space is smaller, the fan is convenient to install and fix in the vehicle, the effective use space in the vehicle is also facilitated to be released, other parts are convenient to be arranged, and the optimization and improvement of the structure in the vehicle are realized.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A fan, characterized in that the fan comprises a motor, a bearing, a fan body and a connecting piece;

2. The fan of claim 1, wherein the motor is an inner rotor motor, the inner race of the bearing rotates synchronously with the output shaft, and the transmission portion abuts against the inner race of the bearing.

3. The fan of claim 1, wherein the motor is an external rotor motor, the outer ring of the bearing rotates relative to the output shaft, and the transmission portion abuts against the outer ring of the bearing.

4. The fan of claim 1, wherein the transmission portion is integrally formed with the connector, and the connector extends axially along the connector to form the transmission portion.

5. The fan of claim 1, wherein the transmission includes an annular boss or at least two spaced apart protrusions.

6. The fan of claim 1, further comprising a stop;

7. The fan as claimed in claim 6, wherein a surface of the stopper on a side away from the connection member in an axial direction of the output shaft does not exceed a surface of the fan body.

8. The fan of claim 6, wherein the limiting member is a nut, the output shaft is provided with external threads, and the nut is in threaded engagement with the external threads.

9. The fan of claim 1, further comprising a snap spring, wherein the output shaft is provided with a clamping groove, and wherein the clamping groove is positioned on one side of the bearing away from the connecting piece;

10. The fan of claim 1, wherein the output shaft includes a first connection and a second connection;

11. The fan of claim 10, wherein the first connection portion is provided with a first milled surface and the inner wall of the connection member is provided with a second milled surface; the first milling flat surface is attached to the second milling flat surface.

12. The fan as claimed in claim 1, wherein the fan body is provided with a receiving groove, and the connecting piece is embedded in the receiving groove;

13. The fan of claim 12, wherein the first limiting structure is a uniformly distributed tooth-shaped structure and the second limiting structure is a uniformly distributed tooth-slot structure.

14. The fan of claim 1, wherein the connector is of unitary construction with the fan body.

15. A vehicle comprising a fan as claimed in any one of claims 1 to 14.