CN110735801A

CN110735801A - Press-resistant fan structure

Info

Publication number: CN110735801A
Application number: CN201911040423.5A
Authority: CN
Inventors: 王得中; 郑敏生; 余添龙; 李名哲
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2019-10-22
Filing date: 2019-10-29
Publication date: 2020-01-31
Also published as: TW202117190A; TWI700435B

Abstract

The invention provides a pressure-resistant fan structure, which comprises a fan frame and a fan wheel, wherein the fan wheel is provided with a supporting shaft for supporting the fan wheel to be arranged in the fan frame, the supporting shaft is provided with a convex section which protrudes out of the fan frame to bear external units positioned above the fan wheel, axial space is maintained between the fan wheel and the external units, the external units are prevented from pressing the fan wheel, and pressure applied to the fan frame is dispersed.

Description

Press-resistant fan structure

Technical Field

The invention relates to the field of fans, in particular to a pressure-resistant fan structure.

Background

The heat dissipation fan is widely assembled in desktop, notebook, tablet and other electronic products to generate heat dissipation function, and the design of notebook, tablet and other products is light and thin, so the current fan is designed to be thin and thin in order to meet the current trend of light and thin.

Therefore, how to solve the above problems and disadvantages is a direction in which the present inventors and related manufacturers in the industry need to research and improve.

Disclosure of Invention

To improve the above problems, of the present invention is to provide a pressure-resistant fan structure that prevents an external unit such as a keyboard or a housing or a panel from pressing the flow channel in the fan wheel and/or the fan frame.

Another object of the invention is to provide and support shaft support fan wheel set in fan frame, the support shaft having protruding segments protruding the fan wheel and the fan frame to receive external unit, to maintain axial space between the external unit and the fan wheel, at least to prevent the fan wheel from being pressed by the external unit.

Another object of the present invention is to provide a fan frame with at least support posts disposed in the flow path of the fan frame to support the projection on the outer surface of the fan frame whereby the projection maintains axial space between the outer unit and the fan frame.

To achieve the above objects, the present invention provides fan structure comprising a fan frame having a 0 upper casing having an air inlet and a 1 lower casing having a coupling seat, a fan having a top wall corresponding to the air inlet and having a central through hole and a 6 annular wall downwardly protruded with an 8 fan shaft housing, a 582 outer side of the annular wall having a plurality of blades, an inner side of the annular wall having a magnetic element, 1 rolling bearing, 2 outer ring seat and inner ring seat, and a retaining element and a plurality of rolling elements disposed between the outer ring seat and the inner ring seat, the outer ring seat being positioned in the fan shaft housing, the inner ring seat forming a engaging hole, a supporting shaft having a fixed end coupled to the coupling seat, and a extending through the through hole of the fan wheel, the supporting shaft extending from the center through hole of the fan wheel and protruding from the upper casing, the supporting shaft having a supporting shaft protruding from the upper end of the supporting shaft and the supporting shaft, the supporting shaft engaging with the and the supporting shaft engaging elements, the supporting shaft protruding from the upper casing and the supporting shaft engaging the upper wall of the supporting shaft, the and the supporting shaft housing, the supporting shaft being disposed between the supporting shaft housing, the supporting shaft engaging element, and the supporting shaft engaging the supporting shaft, wherein the supporting shaft is disposed between the supporting shaft and the supporting shaft, and the supporting shaft engaging the.

The supporting shaft is provided with necks connected by a limiting element, the limiting element is positioned above the rolling bearing, and the necks and the limiting element correspond to the central through hole of the top wall of the fan wheel.

The thrust member has the end contacting the rolling bearing and the second end contacting the combination seat.

The fan frame is provided with side walls and lateral air outlets which are defined between the upper shell and the lower shell, flow channels are defined between the fan wheel and the lateral air outlets, and the fan wheel is a centrifugal fan wheel which corresponds to the lateral air outlets in the horizontal direction.

The flow channel is provided with at least supporting columns, two ends of each supporting column are respectively abutted against the inner surfaces of the upper shell and the lower shell, convex bodies are respectively arranged on the outer surfaces of the upper shell and the lower shell and correspond to two ends of each supporting column, and each convex body is provided with an abutting surface of abutting surfaces aligned with the protruding section of the supporting shaft.

The abutment surface of the aforementioned protruding section and the upper surface of the boss receive the outer unit and form axial space between the outer unit and the fan frame.

The limiting element is a C-shaped retaining ring or an O-shaped retaining ring.

The stator assembly comprises circuit board, silicon steel sheet set disposed on the circuit board and having stacked silicon steel sheets and central through hole sleeved outside the combining seat, and a plurality of coils wound around the silicon steel sheet set.

The thrust member is a spring.

The rolling elements of the rolling bearing include any of balls, needles and rollers .

The central through hole of the top wall is provided with an stopping piece, the stopping piece horizontally protrudes from the top wall towards the center of of the central through hole, and the rolling bearing abuts against the stopping piece.

The combining seat has lower end face, the fixing end of the support shaft has lower end face of the support shaft aligning with the lower end face of the combining seat, the lower end face of the combining seat and the lower end face of the support shaft protrude out of the lower casing of the fan frame aligning with the bottom contact face of the convex body of the lower casing, and the lower end face of the combining seat and the lower end face of the support shaft bear another external unit and form second axial space between the another external unit and the lower casing of the fan frame.

By means of the structure, the external unit can be prevented from being stressed to press the flow channel in the fan wheel and/or the fan frame.

Drawings

FIG. 1 is a schematic exploded perspective view of the present invention;

FIG. 2 is a partially exploded view of the present invention;

FIG. 3 is a perspective view of the present invention;

FIG. 4 is a schematic sectional view of the present invention in combination with a heat exchanger;

FIG. 5A is a schematic diagram of the present invention and an external unit;

fig. 5B is a partially enlarged schematic view of fig. 5A.

The reference numerals indicate a fan frame 10, an upper case 101, an inner face 1011, an outer face 1012, an upper case convex body 1013, a top contact face 10131, a lower case 102, an inner face 1021, an outer face 1022, a lower case convex body 1023, a bottom contact face 10231, an air inlet 103, a coupling seat 104, a coupling seat lower end face 1041, a side wall 105, a lateral air outlet 106, a flow passage 107, a support column 108, a fan wheel 20, a top wall 201, an annular wall 202, a central through hole 203, a stopper 2031, a fan wheel shaft cylinder 204, a magnetic element 205, a blade 207, a rolling bearing 21, an outer ring seat 211, an inner ring seat 212, a rolling body 213, a retaining element 214, a socket hole 215, a support shaft 22, a fixed end 221, a support shaft lower end face 2211, an extension end 222, a convex section 223, an abutment face 2231, a neck 224, a thrust element 23, a end 231, a second end 232, a limiting element 25, a stator set 30, a circuit board 301, a silicon steel sheet set 302, a central through hole 303, an upper insulating frame 304, a lower insulating frame 305, a coil 6340 b.

Detailed Description

The above objects, together with the structural and functional features thereof, are accomplished by the preferred embodiments according to the accompanying drawings.

Referring to fig. 1, a perspective exploded view of the present invention, fig. 2 a partial exploded view of the present invention, fig. 3 a perspective assembled view of the present invention, and fig. 4 a sectional view of the present invention, the present invention includes a fan frame 10 and fan wheels 20 and stator set 30 accommodated in the fan frame 10, the fan frame 10 has upper shells 101 and lower shells 102, the upper shell 101 has a air inlet 103, the lower shell 102 has a coupling seat 104, side walls 105 and side air outlets 106 are defined between the upper shell and the

lower shell

101 and 102, in the present figure, the side walls 105 are disposed around the lower shell 102 and extend vertically to connect to the upper shell 101, but not limited thereto, in another , the side walls 105 may be disposed around the upper shell 101 and extend vertically to connect to the lower shell 102.

flow channel 107 is defined between the fan wheel 20 and the side outlet 106, the flow channel 107 is provided with at least supporting posts 108 having two ends abutting against

inner faces

1011, 1021 of 0 of the upper casing 101 and the lower casing 102, respectively, and

outer faces

1012, 1022 of of the upper casing 101 and the lower casing 102 are provided with upper casing convex bodies 1013 and lower casing convex bodies 1023 corresponding to two ends of the supporting posts 108, wherein the upper casing convex body 1013 has a top abutting face 10131, the lower casing convex body 1023 has a

bottom abutting face

10231, 1023 shows that each supporting post 108 of the two supporting posts 108 corresponds to an upper casing convex body 1013 and a lower casing convex body 1023 respectively.

The impeller 20, such as an centrifugal impeller, is connected to the lateral outlet 106 through the flow channel 107, the impeller 20 has an annular wall 202 of a top wall 201 and , the top wall 201 corresponds to the inlet 103 and has a central through hole 203 , a shaft cylinder 204 of the impeller is downwardly protruded, the central through hole 203 has a stopper 2031 horizontally protruded from the top wall 201 toward the center of the central through hole 203, a plurality of blades 207 are arranged around the outer side of the annular wall 202, and a magnetic element 205, such as a ring magnet, is arranged inside of the annular wall 202.

the rolling bearing 21 is accommodated in the fan wheel shaft 204 to abut against the stopper 2031, the rolling bearing includes outer race seat 211 and inner race seat 212 and a plurality of rolling elements 213 (such as balls or needles or rollers) uniformly distributed between the outer race seat 211 and the inner race seat 212 by means of retaining elements 214 (such as retainers), the inner race seat 212 forms socket holes 215, and the outer race seat 211 is fixed in the fan wheel shaft 204 by contact, for example, in a tight fit manner.

supporting shaft 22 has a fixed end 221 of coupled to the coupling seat 104, and an extended end 222 of extending through the receiving hole 215 of the rolling bearing 21 and protruding from the central through hole 203 of the fan wheel 20 to the air inlet 103, so as to support the fan wheel 20 and the rolling bearing 21 disposed in the fan frame 10, and the supporting shaft 22 forms a protruding section 223 of protruding from the extended end 222 to protrude the top wall 201 of the fan wheel 20 and the upper casing 101 of the fan frame 10, the protruding section 223 having a abutting surface 2231 aligned with the abutting surface 10131 of the upper casing protrusion 1013, furthermore, the supporting shaft 22 has a neck portion 224 at the extended end 223, which is connected by a limiting element 25 (e.g. a C-shaped retaining ring or an O-shaped retaining ring), the neck portion 224 and the limiting element 25 corresponding to the central through hole 203 of the top wall 201 of the fan wheel 20, and the limiting element 25 is located above the rolling bearing 21.

The aforementioned support shaft 22 is selectively sleeved with thrust elements 23 and the thrust element 23 is located between the rolling bearing 21 and the coupling seat 104, the thrust element 23 has end 231 contacting the rolling bearing 21 and second end 232 contacting the coupling seat 104, the thrust element 23 is, for example, a spring elastically supporting the rolling bearing 21 below the rolling bearing 21, except for receiving the axial force generated during the operation of the rolling bearing 21, and limits the axial displacement of the rolling bearing 21 together with the limiting element 25 located above the rolling bearing 21.

The stator assembly 30 is disposed outside of the combining seat 104 and spaced from the magnetic element 205 of the impeller 20, the stator assembly 30 includes a circuit board 301 and a silicon steel sheet assembly 302 disposed on the circuit board 301, the silicon steel sheet assembly 302 has a plurality of stacked silicon steel sheets and a central through hole 303 sleeved outside the combining seat 104, the silicon steel sheet assembly 302 is sandwiched between upper insulating frames 304 and lower insulating frames 305, and a plurality of coils 306 are wound around the silicon steel sheet assembly 302 and the upper and

lower insulating frames

304 and 305.

It should be noted that the coupling seat 104 has lower end surface 1041, the fixed end 221 of the supporting shaft 22 has lower end surface 2211 aligned with the lower end surface 1041, and the lower end surface 1041 and the lower end surface 2211 protrude from the lower casing 102 of the fan frame 10 and abut against another external unit, and further, the lower end surface 1041 and the lower end surface 2211 are aligned with the bottom contact surface 10231 of the lower casing convex body 1023.

Please refer to fig. 5A for a schematic view of the present invention and an external unit, and fig. 5B is a partially enlarged schematic view of fig. 5A, the fan of the present invention is disposed in an electronic device to help heat dissipation of an internal heating element, the electronic device is illustrated in the present drawing and is not limited thereto, and may also be a tablet computer, a mobile phone, a handheld game machine, or other electronic products that can be held by hand, in which an external unit 40a is a keyboard in the present embodiment, but other embodiments are a touch panel, a casing, or a housing are disposed above the fan frame 10, and an abutting surface 2231 of the protruding section 223 of the supporting shaft 22 and an abutting surface 10131 of the protruding body 1013 of the upper housing abut against the external unit 40 to form a th axial space S1 between the external unit 40a and the upper housing 101 of the fan frame 10.

When the external unit 40a is pressed, the external unit 40a generates downward pressing force, the abutting surface 2231 of the protruding section 223 of the supporting shaft 22 and the abutting surface 10131 of the protruding body 1013 of the upper case bear the pressing force of the external unit 40, and the -th axial space S1 provides a temporary pressing micro-deformation space for the external unit 40a to be pressed, so as to prevent the external unit 40a from pressing the fan wheel 20 and/or the flow channel 107 in the fan frame 10, so as to prevent the fan wheel 20 from being pressed and unable to operate and/or prevent the flow channel 107 from being pressed and deformed

Furthermore, the lower end surface 1041 of the coupling seat and the lower end surface 2211 of the supporting shaft abut against the bottom contact surface 10231 of the lower convex body 1023 of the fan frame 10, and the other external unit 40b is a casing in the present embodiment, but is a touch panel or a touch pad or a keyboard in other embodiments, and a second axial space s2 is formed between the other external unit 40b and the lower shell 102 of the fan frame 10, so as to prevent the other external unit 40b from pressing the fan wheel 20 and/or the flow channel 107 in the fan frame 10, and prevent the fan wheel 20 from being pressed to be unable to operate and/or prevent the flow channel 107 from being pressed to deform.

By virtue of the above structure, the present invention can certainly prevent the external units 40a, 40b from being forced to press the flow channel 107 in the fan wheel 20 and/or the fan frame 10.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1, a pressure resistant fan structure, comprising:

fan frame having upper case with air inlet and lower case with connection seat;

impeller having top wall and annular wall , the top wall corresponding to the air inlet and having central through hole and downward convex impeller shaft cylinder, the outer side of of the annular wall having plural blades, the inner side of of the annular wall having magnetic element;

rolling bearing, outer ring seat, inner ring seat, retaining element and plural rolling bodies arranged between the outer ring seat and the inner ring seat, the outer ring seat contacts the inner wall of the fan wheel shaft cylinder, the inner ring seat forms socket hole;

supporting shaft having fixed end and extending end, the fixed end is combined with the combining seat, the extending end extends through the sleeve hole of the rolling bearing and extends from the central hole of the fan wheel to the air inlet to support the fan wheel and the rolling bearing in the fan frame, and forms protruding section from the extending end, the protruding section protrudes the top wall of the fan wheel and the upper shell of the fan frame, the protruding section has abutting surface;

stator set arranged outside of the coupling seat and spaced corresponding to the magnetic element of the impeller;

thrust member passing through the support shaft and located between the rolling bearing and the coupling seat.

2. The structure of claim 1, wherein the supporting shaft has a neck portion , the neck portion is connected by a limiting element , the limiting element is located above the rolling bearing, and the neck portion and the limiting element correspond to the central through hole of the top wall of the fan wheel.

3. The structure of claim 1, wherein the thrust member has the end and the second end, the end contacts the rolling bearing, the second end contacts the coupling seat.

4. The structure of claim 1, wherein the fan frame has sidewalls and lateral outlets, the sidewalls and the lateral outlets are defined between the top case and the bottom case, channels are defined between the impeller and the lateral outlets, and the impeller is a centrifugal impeller and communicates with the lateral outlets through the channels.

5. The structure of claim 4, wherein the flow channel is provided with at least supporting pillars having two ends abutting the inner faces of the upper and lower cases, respectively, and the outer faces 0 of the upper and lower cases are provided with upper case protrusions and lower case protrusions corresponding to the two ends of the supporting pillars, respectively, wherein the upper case protrusions have top contact faces aligned with the contact faces of the protruded sections of the supporting shaft, the lower case protrusions have bottom contact faces, and the contact faces of the protruded sections and the top contact faces of the upper case protrusions receive external units and form th axial space between the external units and the upper case of the fan frame.

6. The structure of claim 1, wherein: the limiting element is a C-shaped retaining ring or an O-shaped retaining ring.

7. The structure of claim 1, wherein: the thrust member is a spring.

8. The structure of claim 1, wherein the rolling elements of the rolling bearing are any of balls, needles and rollers .

9. The structure of claim 1, wherein the central hole of the top wall is provided with an stopper, the stopper horizontally protrudes from the top wall toward the center of of the central hole, and the rolling bearing abuts against the stopper.

10. The structure of claim 5, wherein the coupling base has lower end surface of the coupling base, the fixing end of the supporting shaft has lower end surface of the supporting shaft aligned with the lower end surface of the coupling base, the lower end surfaces of the coupling base and the supporting shaft protrude from the lower casing of the fan frame aligned with the bottom surface of the lower protruding body, and the lower end surfaces of the coupling base and the supporting shaft receive another external unit and form second axial space between the another external unit and the lower casing of the fan frame.