CN211009164U - Press-resistant fan structure - Google Patents

Abstract

The utility model provides a resistant fan structure of pressing, it contains a fan frame and a fan wheel, and this fan wheel has a support shaft to support this fan wheel and sets up in this fan frame, and this support shaft has a protruding section and protrudes this fan frame in order to accept an external unit that is located this fan wheel top, maintains an axial space between this fan wheel and this external unit, prevents this external unit oppression this fan wheel and has the pressure that the dispersion was used to this fan frame concurrently.

Description

Press-resistant fan structure

technical field

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

Background technique

Cooling fans are widely assembled in electronic products such as desktop computers, notebook computers, and tablet computers to generate heat dissipation. At present, the design of notebook computers, tablet computers and other products is based on thin and light design trends. In order to comply with the current trend of thin and light, the current fan is designed to be a thin fan. However, thin fans are easily pressed by panel strikes or keyboard strikes, or product placement deflection or product vibration, which can easily cause damage to the fan wheel or deformation of the runner, which cannot allow airflow to flow out smoothly.

Therefore, how to solve the above-mentioned problems and deficiencies is the direction that the inventor of this case and the relevant manufacturers engaged in this industry urgently want to study and improve.

Utility model content

In order to improve the above problems, an object of the present invention is to provide a pressure-resistant fan structure that prevents external units such as keyboards, casings or panels from pressing the fan wheel and/or the flow channels in the fan frame.

Another object of the present invention is to provide a support shaft supporting a fan wheel to be disposed in a fan frame. The support shaft has a protruding section protruding from the fan wheel and the fan frame to receive an external unit. The axial space is between the outer unit and the fan wheel, at least preventing the fan wheel from being pressed by the outer unit.

Another object of the present invention is to provide at least one support column in the flow channel of the fan frame to support a protrusion on the outer surface of the fan frame to maintain an axial space between the external unit and the fan frame by virtue of the protrusion. .

In order to achieve the above purpose, the present invention provides a pressing fan structure, which comprises: a fan frame, which has an upper shell and a lower shell, the upper shell has an air inlet, and the lower shell has a joint seat; a fan wheel , has a top wall and a ring wall, the top wall corresponds to the air inlet and has a central perforation and downwardly protrudes a fan wheel shaft cylinder, an outer side of the ring wall is provided with a plurality of blades, an inner side of the ring wall is provided with A magnetic element; a rolling bearing, an outer ring seat and an inner ring seat and a holding element and a plurality of rolling bodies arranged between the outer ring seat and the inner ring seat, the outer ring seat is positioned in the fan wheel shaft barrel , the inner ring seat forms a socket hole; a support shaft has a fixed end that is combined with the combination seat, and an extension end extends through the socket hole of the rolling bearing and extends beyond the air inlet from the central perforation of the fan wheel, The fan wheel and the rolling bearing are supported and arranged in the fan frame, and a protruding section is formed from the extending end to protrude from the top wall of the fan wheel and the upper shell of the fan frame, and the protruding section has an abutting surface; A stator group is arranged on an outer side of the combination seat and is spaced apart from the magnetic element corresponding to the fan wheel; a thrust element is sleeved on the support shaft and located between the rolling bearing and the combination seat.

The aforementioned support shaft is provided with a neck which is connected by a limiting element, and the limiting element is located above the rolling bearing, and the neck and the limiting element correspond to the central perforation of the top wall of the fan wheel.

The aforementioned thrust element has a first end contacting the rolling bearing and a second end contacting the coupling seat.

The aforementioned fan frame has a side wall and a side air outlet defined between the upper casing and the lower casing, and a flow channel is defined between the fan wheel and the side air outlet; the fan wheel is a centrifugal fan wheel in A horizontal direction corresponds to the side air outlet.

The flow channel is provided with at least one support column with two ends respectively contacting an inner surface of the upper shell and the lower shell, and an outer surface of the upper shell and the lower shell is respectively provided with a convex body corresponding to the two ends of the support column, the The protruding body has an abutting surface aligned with the protruding section of the support shaft.

The abutting surface of the protruding section and an upper surface of the protruding body receive an external unit, and form an axial space between the external unit and the fan frame.

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

The aforementioned stator group includes: a circuit board; a silicon steel sheet group disposed on the circuit board, with a plurality of stacked silicon steel sheets and a central through hole sleeved on the outer side of the combination seat; and a plurality of coils wound around the silicon steel sheet Group.

The aforementioned thrust element is a spring.

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

A stopper is provided in the central through hole of the top wall, the stopper protrudes horizontally from the top wall toward a center of the central through hole, and the rolling bearing abuts against the stopper.

The combination seat has a lower end surface of the combination seat, the fixed end of the support shaft has a lower end surface of the support shaft, which is aligned with the lower end surface of the combination seat, and the lower end surface of the combination seat and the lower end surface of the support shaft protrude from the lower shell of the sector frame The bottom contact surface of the convex body of the lower shell is aligned, and the lower end surface of the combination seat and the lower end surface of the support shaft receive another external unit and form a second axial space between the other external unit and the lower shell of the sector frame .

With the above structure, it is possible to prevent the external unit from being forced to press the flow channel in the fan wheel and/or the fan frame.

Description of drawings

Fig. 1 is the three-dimensional exploded schematic diagram of the utility model;

Fig. 2 is the partial exploded schematic diagram of the utility model;

Fig. 3 is a three-dimensional combined schematic diagram of the utility model;

Fig. 4 is the utility model combined sectional schematic diagram of the utility model;

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

FIG. 5B is a partial enlarged schematic view of FIG. 5A .

Description of reference numerals: fan frame 10; upper shell 101; inner surface 1011; outer surface 1012; upper shell convex body 1013; top contact surface 10131; lower shell 102; inner surface 1021; ; Air inlet 103; Combination seat 104; Combination seat lower end face 1041; Side wall 105; Side air outlet 106; Flow channel 107; Support column 108; Stopper 2031; Fan wheel shaft barrel 204; Magnetic element 205; Blade 207; Rolling bearing 21; Outer ring seat 211; Inner ring seat 212; Rolling body 213; Retaining element 214; Support shaft lower end surface 2211; extension end 222; protruding section 223; abutting surface 2231; neck 224; thrust element 23; first end 231; second end 232; limit element 25; stator group 30; circuit board 301; silicon steel sheet group 302; central through hole 303; upper insulating frame 304; lower insulating frame 305; coil 306; external units 40a, 40b; first axial space S1; second axial space S2.

Detailed ways

The above-mentioned purpose of the present invention and its structural and functional characteristics will be described with reference to the preferred embodiments of the accompanying drawings.

Please refer to FIG. 1 for a schematic three-dimensional exploded view of the present utility model; FIG. 2 for a partial exploded schematic view of the present utility model; FIG. 3 for a three-dimensional combined schematic view of the present utility model; and FIG. As shown in the figure, the present invention includes a fan frame 10, a fan wheel 20 and a stator group 30 accommodated in the fan frame 10, the fan frame 10 has an upper shell 101 and a lower shell 102, the upper shell 101 has an air inlet 103, the lower case 102 has a joint seat 104, a side wall 105 and a side air outlet 106 are defined between the upper case and 101 the lower case 102, the side wall is represented in this drawing 105 is disposed around the lower case 102 and extends vertically to connect with the upper case 101 , but is not limited to this. In another implementation, the sidewall 105 can be disposed around the upper case 101 and extends vertically to connect to the lower case 102 .

The flow channel 107 is defined between the fan wheel 20 and the side air outlet 106 . The flow channel 107 is provided with at least one support column 108 having two ends abutting against an inner surface 1011 and 1021 of the upper shell 101 and the lower shell 102 respectively. , and an outer surface 1012 and 1022 of the upper shell 101 and the lower shell 102 are respectively provided with an upper shell protrusion 1013 and a lower shell protrusion 1023 corresponding to the two ends of the supporting column 108 , wherein the upper shell protrusion 1013 has a top The contact surface 10131, the lower shell convex body 1023 has a bottom contact surface 10231. In this figure, each of the two support columns 108 corresponds to an upper case protrusion 1013 and a lower case protrusion 1023 respectively.

The fan wheel 20 is, for example, a centrifugal fan wheel that communicates with the side air outlet 106 through the flow channel 107 . The fan wheel 20 has a top wall 201 and a ring wall 202 . The top wall 201 corresponds to the air inlet 103 and has a The central through hole 203 protrudes downwardly with a fan wheel shaft 204 , and a stopper 2031 protrudes horizontally from the top wall 201 toward a center of the central through hole 203 , and an outer side of the ring wall 202 is surrounded by a A plurality of vanes 207 and a magnetic element 205 such as a ring magnet are arranged on an inner side of the ring wall 202 .

A rolling bearing 21 is accommodated in the fan wheel shaft 204 against the stopper 2031 . The rolling bearing includes an outer ring seat 211 and an inner ring seat 212 and a plurality of rolling elements 213 (such as balls, needles or rollers) by means of A holding element 214 (such as a cage) is evenly distributed between the outer ring seat 211 and the inner ring seat 212 , the inner ring seat 212 forms a socket hole 215 , and the outer ring seat 211 is in contact with, for example, a tight fit. It is fixed in the shaft barrel 204 of the fan wheel.

A support shaft 22 has a fixed end 221 to be combined with the combination seat 104 , and an extension end 222 extending through the socket hole 215 of the rolling bearing 21 from the central through hole 203 of the fan wheel 20 beyond the air inlet 103 Then, the fan wheel 20 and the rolling bearing 21 are supported in the fan frame 10 , and the support shaft 22 forms a protruding section 223 from the extension end 222 to protrude from the top wall 201 of the fan wheel 20 and the fan frame 10 . The upper case 101 of the upper case, the protruding section 223 has a contact surface 2231 aligned with the top contact surface 10131 of the upper case protrusion 1013 . Furthermore, the support shaft 22 is provided with a neck 224 at the extending end 223 to be connected by a limiting element 25 (such as a C-type buckle or an O-ring), and the neck 224 and the limiting element 25 correspond to the fan. The center hole 203 of the top wall 201 of the wheel 20 makes the limiting element 25 located above the rolling bearing 21 .

The aforementioned support shaft 22 is optionally sheathed with a thrust element 23 and the thrust element 23 is located between the rolling bearing 21 and the combination seat 104 , and the thrust element 23 has a first end 231 contacting the rolling bearing 21 and a second The end 232 is in contact with the combination seat 104 , and the thrust element 23 is, for example, a spring under the rolling bearing 21 that elastically pushes against the rolling bearing 21 , in addition to receiving the axial force when the rolling bearing 21 is running, and is connected with the rolling bearing 21 above the rolling bearing 21 . The limiting elements 25 jointly limit the axial displacement of the rolling bearing 21 .

The stator group 30 is disposed at an outer space of the coupling seat 104 corresponding to the magnetic element 205 of the fan wheel 20 . The stator group 30 includes a circuit board 301 and a silicon steel sheet group 302 disposed on the circuit board 301 . The silicon steel sheet The group 302 has a plurality of stacked silicon steel sheets and a central through hole 303 sleeved on the outer side of the joint seat 104, the silicon steel sheet group 302 is sandwiched between an upper insulating frame 304 and a lower insulating frame 305, and the plurality of coils 306 are wound. The silicon steel sheet group 302 and the upper and lower insulating frames 304 and 305 .

In addition, the combination seat 104 has a lower end surface 1041 of the combination seat, the fixed end 221 of the support shaft 22 has a lower end surface 2211 of the support shaft aligned with the lower end surface 1041 of the combination seat, and the lower end surface 1041 of the combination seat and the support shaft The lower end surface 2211 protrudes from the lower casing 102 of the sector frame 10 and abuts against another external unit. Furthermore, the lower end surface 1041 of the combination seat and the lower end surface 2211 of the supporting shaft are aligned with the bottom contact surface 10231 of the lower shell protrusion 1023 .

Please continue to refer to FIG. 5A , which is a schematic diagram of the present invention and the external unit; FIG. 5B is a partially enlarged schematic diagram of FIG. 5A . The fan in this case is arranged in an electronic device to help dissipate heat from the internal heating element. The electronic device in this case represents a laptop, but is not limited to this. It can also be a tablet computer, a mobile phone, a handheld game console, or other hand-held electronic products, etc. , an external unit 40a is a keyboard in this embodiment, but in other embodiments, a touch panel or a touch panel or a casing or a casing is located above the sector frame 10, the protruding section 223 of the support shaft 22 is The abutting surface 2231 and the abutting surface 10131 of the upper casing protrusion 1013 together bear against the outer unit 40 to form a first axial space S1 between the outer unit 40 a and the upper casing 101 of the fan frame 10 .

When the outer unit 40a is pressed, the outer unit 40a generates a downward compressive force, and the abutting surface 2231 of the protruding section 223 of the support shaft 22 and the abutting surface 10131 of the upper shell protrusion 1013 bear the pressure of the outer unit 40 compressive force, and the first axial space S1 provides the outer unit 40a being pressed to produce a short-term downward pressure micro-deformation space to prevent the outer unit 40a from compressing 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 compressed and unable to operate and/or prevent the flow channel 107 from being compressed and deformed

Furthermore, the lower end surface 1041 of the coupling seat and the lower end surface 2211 of the support shaft and the bottom contact surface 10231 of the lower case convex body 1023 abut against another external unit 40b located under the fan frame 10. In this embodiment, it is a case, but In other embodiments, it is a touch panel, a touch pad or a keyboard, and a second axial space S2 is formed between the other external unit 40b and the lower casing 102 of the sash 10 . This prevents another external unit 40b from pressing the fan wheel 20 and/or the flow channel 107 in the fan frame 10, preventing the fan wheel 20 from being pressed and unable to operate and/or preventing the flow channel 107 from being pressed and deformed.

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

The above description is only illustrative rather than restrictive for the present invention, and those of ordinary skill in the art will understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the claims. But all will fall within the protection scope of the present invention.

Claims (10)

1. A press resistant fan structure, comprising:

a fan frame having an upper casing and a lower casing, wherein the upper casing has an air inlet and the lower casing has a combining seat;

a fan wheel, which has a top wall and a ring wall, the top wall corresponds to the air inlet and has a central through hole and a fan wheel shaft cylinder is arranged in a downward convex manner, a plurality of blades are arranged on one outer side of the ring wall, and a magnetic element is arranged on one inner side of the ring wall;

the bearing comprises a rolling bearing, an outer ring seat, an inner ring seat, a retaining element and a plurality of rolling elements, wherein the retaining element and the plurality of rolling elements are arranged between the outer ring seat and the inner ring seat;

a supporting shaft, which is provided with a fixed end and an extending end, wherein the fixed end is combined with the combining seat, the extending end extends through the sleeving hole of the rolling bearing and exceeds the air inlet from the central perforation of the fan wheel to support the fan wheel and the rolling bearing to be arranged in the fan frame, a protruding section is formed from the extending end, the protruding section protrudes out of the top wall of the fan wheel and the upper shell of the fan frame, and the protruding section is provided with a butting surface;

a stator set arranged at one outer side of the combining seat and corresponding to the magnetic element of the fan wheel at intervals;

and the thrust element is sleeved on the support shaft and is positioned between the rolling bearing and the combining seat.

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

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

4. The structure of claim 1, wherein: the fan frame is provided with a side wall and a lateral air outlet, the side wall and the lateral air outlet are defined between the upper shell and the lower shell, and a flow passage is defined between the fan wheel and the lateral air outlet; the fan wheel is a centrifugal fan wheel and is communicated with the lateral air outlet through the flow channel.

5. The pressure-resistant fan structure of claim 4, wherein: the runner is provided with at least one supporting column, two ends of the supporting column are respectively abutted against the inner surfaces of the upper shell and the lower shell, an upper shell convex body and a lower shell convex body are respectively arranged at two ends of the outer surfaces of the upper shell and the lower shell corresponding to the supporting column, the upper shell convex body is provided with a top joint surface, the top joint surface is aligned with the abutting surface of the protruding section of the supporting shaft, the lower shell convex body is provided with a bottom joint surface, and the abutting surface of the protruding section and the top joint surface of the upper shell convex body are used for bearing an external unit and forming a first axial space between the external unit and the upper shell 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 bodies of the rolling bearing are any one of balls, needles and rollers.

9. The structure of claim 1, wherein: the central through hole of the top wall is provided with a stop piece, the stop piece horizontally protrudes from the top wall to the center of the central through hole, and the rolling bearing is abutted against the stop piece.

10. The structure of claim 5, wherein: the lower end face of the combining seat and the lower end face of the supporting shaft protrude out of the lower shell of the fan frame to align with the bottom joint face of the lower shell convex body, and the lower end face of the combining seat and the lower end face of the supporting shaft accept another external unit and form a second axial space between the another external unit and the lower shell of the fan frame.

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