CN109185202B

CN109185202B - Electric fan head assembly and electric fan

Info

Publication number: CN109185202B
Application number: CN201811419512.6A
Authority: CN
Inventors: 陈宇强; 王孝忱; 肖鸿亮; 柳洲; 梁浩
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2024-07-09
Anticipated expiration: 2038-11-26
Also published as: CN109185202A

Abstract

The invention provides an electric fan head assembly and an electric fan. The electric fan head assembly includes: the fan blade is provided with a mounting hole in the center; the shaft sleeve is fixedly arranged in the mounting hole, and a first anti-eccentric part is arranged on the inner wall surface of the shaft hole of the shaft sleeve; a knob detachably mounted on the top of the sleeve; the anti-eccentric device comprises an inner insert and a motor, wherein the inner insert is fixedly arranged on an output shaft of the motor, penetrates through the shaft hole and is fixedly connected with the knob, and a second anti-eccentric part matched with the first anti-eccentric part is arranged on the inner insert. The invention can prevent the eccentric assembly between the shaft sleeve and the embedded piece, reduce the unbalanced mass of the head assembly of the electric fan, further reduce the shake of the fan blade and the head assembly of the electric fan, and improve the running stability of the head assembly of the electric fan.

Description

Electric fan head assembly and electric fan

Technical Field

The invention relates to the technical field of fans, in particular to an electric fan head assembly and an electric fan.

Background

At present, in domestic and foreign electric fan products, the left-right swing and up-down shake of a fan head can occur, and the running stability is seriously affected. Among the types of fans, common floor fans, direct current floor fans, table floor fans and square fans have the resonance problem of different types. Most of the existing products adopt a method of not setting gears in a vibration interval, but the uniformity of rotating speed spans among gears is seriously affected, and the user experience is affected.

The conventional fan blade and motor shaft assembly structure is large in fit clearance in order to facilitate the assembly and disassembly of the fan blade by a user, and therefore the problem of eccentric assembly is necessarily caused, unbalanced mass is increased, and the problem of serious swing and shaking of a fan head is caused.

As shown in fig. 1, the structure of the existing electric fan head assembly is composed of a fan blade knob 1, a fan blade 2, a shaft sleeve 3, a gasket 4, a clamp spring 5 and a motor 6.

As shown in fig. 2, the prior art scheme is that the shaft sleeve 3 and the motor shaft of the motor 6 are matched by straight surfaces, if a larger fit clearance is adopted in the scheme, assembly eccentricity easily occurs, so that unbalanced mass is increased, the shaking of the head of the electric fan is serious, and the running stability is affected. In addition, if the scheme in fig. 2 adopts a smaller fit clearance, the processing difficulty is increased, the processing cost is increased, the user is difficult to assemble and disassemble, and the use experience of the user is affected.

Disclosure of Invention

The invention mainly aims to provide an electric fan head assembly and an electric fan, which are used for solving the problems of left-right swing and up-down shake of a fan head caused by easy eccentricity of fan blade assembly of the electric fan in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided an electric fan head assembly comprising: the fan blade is provided with a mounting hole in the center; the shaft sleeve is fixedly arranged in the mounting hole, and a first anti-eccentric part is arranged on the inner wall surface of the shaft hole of the shaft sleeve; a knob detachably mounted on the top of the sleeve; the anti-eccentric device comprises an inner insert and a motor, wherein the inner insert is fixedly arranged on an output shaft of the motor, penetrates through the shaft hole and is fixedly connected with the knob, and a second anti-eccentric part matched with the first anti-eccentric part is arranged on the inner insert.

Further, the first anti-eccentric portion is a first conical surface formed on an inner wall surface of the shaft hole; the second anti-eccentric portion is a second conical surface formed on the outer surface of the insert and matched with the first conical surface.

Further, the second conical surface comprises at least two conical inclined surfaces which are arranged at intervals along the axial direction of the embedded piece.

Further, a plurality of inclined ribs are arranged on the periphery of the insert, the inclined ribs are connected between two adjacent conical inclined planes, and a preset gap is reserved between the inclined ribs and the first conical surface.

Further, an internal thread is arranged on the knob, and an external thread matched with the internal thread is arranged at the top end of the embedded part.

Further, the bottom of the mounting hole is provided with a limiting inner flange, and the bottom of the shaft sleeve is lapped on the limiting inner flange.

Further, the middle part of fan blade is provided with spacing recess, the mounting hole is located spacing recess's bottom central authorities, the periphery of axle sleeve be provided with spacing recess looks adaptation's outer flange.

Further, a positioning hole is formed in the axial direction of the insert, a shrinkage cavity section is formed in the top of the positioning hole, an output shaft of the motor penetrates through the positioning hole, and a protrusion in interference fit with the shrinkage cavity section is formed in the top of the output shaft of the motor.

Further, one end of the positioning hole, which is far away from the knob, is provided with a tight fit section, and the output shaft of the motor is provided with a first stage in interference fit with the tight fit section.

Further, the part of the positioning hole between the shrinkage cavity section and the tight fit section is a clearance fit section, and a second preset gap is formed between the clearance fit section and the output shaft of the motor.

Further, a limiting step is arranged on an output shaft of the motor, and the bottom of the embedded piece is propped against the limiting step.

Further, a first radial pin hole is formed in the bottom end of the inner insert, a second radial pin hole corresponding to the first radial pin hole is formed in an output shaft of the motor, and the inner insert and the output shaft of the motor are fixedly connected through a positioning pin penetrating through the first radial pin hole and the second radial pin hole.

Further, the bottom of shaft hole is provided with the reaming portion of stepping down, the external diameter of reaming portion of stepping down is greater than the length of locating pin.

Further, a cross beam is arranged at the bottom end of the embedded piece, and an opening part matched with the cross beam is arranged at the bottom of the shaft sleeve.

According to another aspect of the present invention, there is provided an electric fan including a head assembly, the head assembly being the electric fan head assembly described above.

When the technical scheme of the invention is applied, the shaft sleeve is fixed in the mounting hole firstly, then the embedded piece is fixedly arranged on the output shaft of the motor, and finally the embedded piece assembled on the motor is arranged in the shaft sleeve and is fixedly connected with the embedded piece through the knob. In the process, through the cooperation of the first eccentric prevention part on the inner wall surface of the shaft hole and the second eccentric prevention part on the embedded part, the assembly eccentricity between the shaft sleeve and the embedded part can be prevented, the unbalanced mass of the electric fan head assembly is reduced, the shake of the fan blade and the electric fan head assembly is further reduced, and the running stability of the electric fan head assembly is improved.

Drawings

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

FIG. 1 schematically illustrates an exploded view of a prior art electric fan head assembly;

FIG. 2 schematically illustrates an enlarged partial cross-sectional view of a hub of a prior art electric fan head assembly;

FIG. 3 schematically illustrates an exploded view of the electric fan head assembly of the present invention;

FIG. 4 schematically illustrates a cross-sectional view of the electric fan head assembly of the present invention;

FIG. 5 schematically illustrates an enlarged partial cross-sectional view of the present invention at the hub of the motor-fan head assembly;

FIG. 6 schematically illustrates a perspective view of an insert of the electric fan head assembly of the present invention;

fig. 7 schematically illustrates a perspective view of a shaft sleeve of the electric fan head assembly of the present invention; and

Fig. 8 schematically illustrates a perspective view of a motor of the electric fan head assembly of the present invention.

Wherein the above figures include the following reference numerals:

10. a fan blade; 11. a mounting hole; 111. a limit inner flange; 12. a limit groove; 20. a shaft sleeve; 21. a shaft hole; 211. a reamer part; 212. a first anti-misalignment portion; 22. an opening portion; 23. an outer flange; 30. an insert; 31. an external thread; 32. a second anti-misalignment portion; 321. taper inclined plane; 33. a first radial pin bore; 34. diagonal ribs; 35. positioning holes; 351. a shrinkage cavity section; 352. a clearance fit section; 353. a tight fit section; 36. a cross beam; 40. a motor; 41. an output shaft; 411. a first stage; 412. a limit step; 413. a protrusion; 42. a second radial pin bore; 50. a positioning pin; 60. a knob; 61. and (5) an internal thread.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 3 to 8, according to an embodiment of the present invention, there is provided an electric fan head assembly including a fan blade 10, a shaft sleeve 20, a knob 60, an insert 30, and a motor 40.

Wherein, the center of the fan blade 10 is provided with a mounting hole 11; the shaft sleeve 20 is fixedly installed in the installation hole 11, and the inner wall surface of the shaft hole 21 of the shaft sleeve 20 is provided with a first anti-eccentric part 212; knob 60 is removably mounted on top of sleeve 20; the insert 30 is fixedly installed on the output shaft 41 of the motor 40, the insert 30 is inserted into the shaft hole 21 and fixedly connected with the knob 60, and the insert 30 is provided with a second anti-eccentric portion 32 matched with the first anti-eccentric portion 212.

When the electric fan head assembly in this embodiment is actually assembled, the shaft sleeve 20 is first fixed in the mounting hole 11, then the insert 30 is fixedly mounted on the output shaft 41 of the motor 40, and finally the insert 30 assembled on the motor 40 is mounted in the shaft sleeve 20 and fixedly connected with the insert 30 through the knob 60. In the process, through the cooperation of the first eccentric prevention part 212 on the inner wall surface of the shaft hole 21 and the second eccentric prevention part 32 on the insert 30, the assembly eccentricity between the shaft sleeve 20 and the insert 30 can be prevented, the unbalanced mass of the electric fan head assembly is reduced, the shake of the fan blade 10 and the electric fan head assembly is further reduced, and the running stability of the electric fan head assembly is improved.

The motor 40 in this embodiment may be a direct current motor or an alternating current motor. The fan blade 10 is not limited to seven fan blades, but may be any other type of fan blade.

Preferably, the first anti-eccentric portion 212 in the present embodiment is a first tapered surface formed on the inner wall surface of the shaft hole 21; correspondingly, the second anti-eccentric portion 32 is a second tapered surface formed on the outer surface of the insert 30 and mated with the first tapered surface, and the slope of the first tapered surface is equal to the slope of the second tapered surface. By the cooperation of the first conical surface and the second conical surface, the shaft sleeve 20 and the embedded piece 30 can be in gapless contact, and the eccentric possibility of the assembly of the electric fan head assembly is reduced.

Specifically, the second conical surface in this embodiment includes at least two conical inclined surfaces 321 that are disposed at intervals along the axial direction of the insert 30. The outer circumference of the insert 30 is provided with a plurality of inclined ribs 34, the inclined ribs 34 are connected between two adjacent tapered inclined surfaces 321, and a predetermined gap is provided between the inclined ribs 34 and the first tapered surface. In this embodiment, the second conical surface is set to be a plurality of conical inclined planes 321 arranged at intervals and connected through the inclined ribs 34, so that the contact area between the insert 30 and the first conical surface can be effectively reduced, and the sleeve 20 and the insert 30 are prevented from being blocked in the process of disassembly and assembly.

The number of ribs 34 on the insert 30 in this embodiment may be one, two or more than three, and the number and form of ribs 34 are not unique.

In order to facilitate the connection of the insert 30 and the knob 60, the knob 60 in this embodiment is provided with an internal thread 61, and the top end of the insert 30 is provided with an external thread 31 adapted to the internal thread 61, so as to facilitate the disassembly and assembly. Of course, in other embodiments of the present invention, the insert 30 and the knob 60 may be fixed by a screw or bolt, and other modifications are within the scope of the present invention.

In order to facilitate the installation and limit of the shaft sleeve 20, the bottom end of the installation hole 11 is provided with a limit inner flange 111, and the bottom of the shaft sleeve 20 is lapped on the limit inner flange 111.

Meanwhile, the middle part of fan blade 10 is provided with spacing recess 12, and mounting hole 11 is located spacing recess 12 bottom central authorities, and the periphery of axle sleeve 20 is provided with the outer flange 23 with spacing recess 12 looks adaptation, and the diameter in cooperation position is approximately equal, is convenient for fix a position and support axle sleeve 20, guarantees the stability of whole structure.

In order to facilitate the installation of the insert 30 on the output shaft 41 of the motor 40, a positioning hole 35 is provided in the axial direction of the insert 30 in this embodiment, a shrinkage cavity 351 is provided at the top of the positioning hole 35, during installation, the output shaft 41 of the motor 40 is transmitted in the positioning hole 35, and a protrusion 413 in interference fit with the shrinkage cavity 351 is provided at the top of the output shaft 41 of the motor 40, so that the clearance fit between the output shaft 41 and the insert 30 is facilitated.

Correspondingly, the end of the positioning hole 35 far away from the knob 60 in the present embodiment is provided with a tight fit section 353, and the output shaft 41 of the motor 40 is provided with a first stage 411 in interference fit with the tight fit section 353, so as to further ensure that the output shaft 41 is in clearance fit with the insert 30.

During assembly, the part of the positioning hole 35 between the shrinkage cavity section 351 and the tight fit section 353 is a clearance fit section 352, and a second preset gap is formed between the clearance fit section 352 and the output shaft 41 of the motor 40, so that the contact area between the insert 30 and the output shaft 41 can be reduced, and the clamping phenomenon occurs during the assembly and disassembly processes.

The output shaft 41 of the motor 40 in this embodiment is provided with a limiting step 412, and the bottom of the insert 30 abuts against the limiting step 412, so that the axial positioning of the insert 30 can be realized.

In order to fixedly connect the insert 30 with the output shaft 41 of the motor 40, the bottom end of the insert 30 is provided with a first radial pin hole 33, the output shaft 41 of the motor 40 is provided with a second radial pin hole 42 corresponding to the first radial pin hole 33, and the insert 30 and the output shaft 41 of the motor 40 are fixedly connected by a positioning pin 50 penetrating through the first radial pin hole 33 and the second radial pin hole 42.

The bottom end of the shaft hole 21 in this embodiment is provided with a relief reamer part 211, and the outer diameter of the relief reamer part 211 is larger than the length of the locating pin 50, so that the assembly is facilitated, and the appearance perfection of the whole structure is ensured. The relief reamer part 211 is a stepped straight hole part, and has a simple structure and is convenient to process.

Preferably, the bottom end of the insert 30 in this embodiment is provided with a cross beam 36, the bottom of the sleeve 20 is provided with an opening 22 matched with the cross beam 36, and in the actual assembly process, the lower ends of the fan blades 10 are limited by the action of the cross beam 36 and the opening 22, so that the lower ends of the fan blades 10 and the sleeve 20 which are assembled together are conveniently limited, the insert 30 and the sleeve 20 can be prevented from being relatively displaced, and the knob 60 is conveniently screwed, so that the knob 60 is quickly screwed and fixed at the top end of the insert 30.

As shown in fig. 3, 4 and 5, during actual assembly, the shaft sleeve 20 is first adhered in the mounting hole 11 on the fan blade 10, then the insert 30 is assembled on the output shaft 41, the axial limit of the insert 30 is realized through the step of the protrusion 413 on the output shaft 41, and then the positioning pin 50 is inserted to realize complete limit. Then the fan blade 10 is assembled on the embedded piece 30, the lower end is limited by the structure of the cross beam 36 at the lower end of the embedded piece 30, and the upper end is limited by screwing the knob 60.

The matching part of the insert 30 and the shaft sleeve 20 is a conical inclined surface 321 at two ends, the interior of the shaft sleeve 20 is a first conical surface, namely a circular arc inclined surface, and the inclination of the two inclined surfaces is equal. The insert 30 and the sleeve 20 form a beveled fit which, compared with the prior art, ensures a smaller assembly gap and reduces the eccentricity of the shaft bore 21 during assembly, thereby reducing the unbalanced mass and effectively reducing the amplitude of the vibrations of the handpiece.

The part of the inclined rib 34 in the middle between the two matched conical inclined planes 321 is not contacted with the first conical surface on the inner wall surface of the shaft sleeve 20, so that the assembly guiding function is mainly achieved, the assembly of a user is convenient, and the problem of blocking caused by the fact that the first conical surface is too large in contact is solved. And with this structure, the lower end of the shaft hole 21 is provided with the reamer part 211, which is convenient for the user to assemble during the assembling process. The crossbeam 36 of inserts 30 lower extreme can play spacing effect for when the user installs fan blade 10, the too big problem of difficult dismantlement of pressure between the contact surface can not appear.

Therefore, the invention replaces the original straight-face matching mode of the shaft sleeve and the output shaft by the matching mode of the first conical surface and the second conical surface, and can effectively avoid the problem of incorrect assembly, the increase of unbalanced mass and the problem of machine head shake. In addition, through the mode of increasing the inserts, the problem that the inclined plane is difficult to process is solved by directly processing the inclined plane on the output shaft, and the surface of the output shaft can be prevented from rusting. And the first conical surface and the second conical surface contact are easier for a user to install than straight surface contacts. The inner insert and the output shaft adopt partial interference fit, and the assembly of the inner insert and the output shaft is ensured to be gapless. When the embedded piece is matched with the fan blade shaft sleeve, partial inclined surface contact is adopted, the contact area is reduced, and the embedded piece is not easy to be blocked in the disassembly and assembly process.

The improved structure and the existing structure are verified on the same prototype, the existing structure has 120RPM in the vibration interval, the improved structure has 80RPM in the vibration interval, and the effect is obvious as shown in the table 1.

Table 1:

According to another aspect of the present invention, there is provided an electric fan including a head assembly, which is the electric fan head assembly of the above-described embodiment.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

According to the invention, the original straight-face matching mode of the shaft sleeve and the output shaft is replaced by the matching mode of the first conical surface and the second conical surface, so that the problem of incorrect assembly and the problem of machine head shake caused by the increase of unbalanced mass can be effectively avoided. In addition, through the mode of increasing the inserts, the problem that the inclined plane is difficult to process is solved by directly processing the inclined plane on the output shaft, and the surface of the output shaft can be prevented from rusting. And the first conical surface and the second conical surface contact are easier for a user to install than straight surface contacts. The inner insert and the output shaft adopt partial interference fit, and the assembly of the inner insert and the output shaft is ensured to be gapless. When the embedded piece is matched with the fan blade shaft sleeve, partial inclined surface contact is adopted, the contact area is reduced, and the embedded piece is not easy to be blocked in the disassembly and assembly process.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric fan head assembly, comprising:

the fan comprises a fan blade (10), wherein a mounting hole (11) is formed in the center of the fan blade (10);

the shaft sleeve (20) is fixedly arranged in the mounting hole (11), and a first anti-eccentric part (212) is arranged on the inner wall surface of the shaft hole (21) of the shaft sleeve (20);

A knob (60), the knob (60) being detachably mounted on top of the sleeve (20);

The device comprises an insert (30) and a motor (40), wherein the insert (30) is fixedly arranged on an output shaft (41) of the motor (40), the insert (30) penetrates through the shaft hole (21) and is fixedly connected with the knob (60), and a second anti-eccentric part (32) matched with the first anti-eccentric part (212) is arranged on the insert (30);

The middle part of the fan blade (10) is provided with a limiting groove (12), the mounting hole (11) is positioned at the bottom center of the limiting groove (12), and the periphery of the shaft sleeve (20) is provided with an outer flange (23) matched with the limiting groove (12);

the bottom end of the embedded piece (30) is provided with a cross beam (36), and the bottom of the shaft sleeve (20) is provided with an opening (22) matched with the cross beam (36);

Wherein the first anti-eccentric portion (212) is a first conical surface formed on the inner wall surface of the shaft hole (21); the second anti-eccentric part (32) is a second conical surface which is formed on the outer surface of the insert (30) and matched with the first conical surface; the bottom of the mounting hole (11) is provided with a limiting inner flange (111), and the bottom of the shaft sleeve (20) is lapped on the limiting inner flange (111).

2. The electric fan head assembly of claim 1, wherein the second conical surface comprises at least two conical inclined surfaces (321) spaced apart along the axial direction of the insert (30).

3. The electric fan head assembly according to claim 2, characterized in that the outer periphery of the insert (30) is provided with a plurality of diagonal ribs (34), the diagonal ribs (34) are connected between two adjacent tapered inclined planes (321), and a predetermined gap is provided between the diagonal ribs (34) and the first tapered surface.

4. The electric fan head assembly according to claim 1, characterized in that the knob (60) is provided with an internal thread (61), and the top end of the insert (30) is provided with an external thread (31) adapted to the internal thread (61).

5. The electric fan head assembly according to claim 1, characterized in that a positioning hole (35) is arranged in the axial direction of the insert (30), a shrinkage cavity section (351) is arranged at the top of the positioning hole (35), an output shaft (41) of the motor (40) is arranged in the positioning hole (35) in a penetrating manner, and a protrusion (413) in interference fit with the shrinkage cavity section (351) is arranged at the top of the output shaft (41) of the motor (40).

6. The electric fan head assembly according to claim 5, characterized in that an end of the positioning hole (35) remote from the knob (60) is provided with a tight-fitting section (353), and the output shaft (41) of the motor (40) is provided with a first stage (411) of interference fit with the tight-fitting section (353).

7. The electric fan head assembly of claim 6, characterized in that the location of the positioning hole (35) between the shrink-hole section (351) and the tight-fit section (353) is a clearance-fit section (352), the clearance-fit section (352) having a second predetermined gap with the output shaft (41) of the motor (40).

8. The electric fan head assembly according to claim 1, characterized in that a limit step (412) is provided on the output shaft (41) of the motor (40), and the bottom of the insert (30) abuts against the limit step (412).

9. The electric fan head assembly according to claim 1, wherein a first radial pin hole (33) is formed in the bottom end of the insert (30), a second radial pin hole (42) corresponding to the first radial pin hole (33) is formed in an output shaft (41) of the motor (40), and the insert (30) and the output shaft (41) of the motor (40) are fixedly connected through a positioning pin (50) penetrating through the first radial pin hole (33) and the second radial pin hole (42).

10. The electric fan head assembly according to claim 9, characterized in that a bottom end of the shaft hole (21) is provided with a relief reamer part (211), and an outer diameter of the relief reamer part (211) is larger than a length of the positioning pin (50).

11. An electric fan comprising a handpiece assembly, characterized in that the handpiece assembly is an electric fan handpiece assembly as claimed in any one of claims 1 to 10.