TWI700435B - Anti-press fan structure - Google Patents

Abstract

An anti-press fan structure includes a fan frame and a fan impeller. The fan impeller has a support shaft supporting the fan impeller disposed in the fan frame. The support shaft has a protrusion section protruding from the fan frame to bear and connect with an external unit positioned above the fan impeller so as to keep an axial space between the fan impeller and the external unit. Accordingly, the fan impeller is prevented from being compressed by the external unit and the pressure applied to the fan frame is dispersed.

Description

Pressure resistant fan structure

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

Press, cooling fans are widely assembled in desktop computers, notebook computers, tablet computers and other electronic products to produce heat dissipation function, and the current design of notebook computers, tablet computers and other products are designed to be thin and light. Trend, in order to comply with the current trend of lightness and thinness, the current fan is designed to be a thin fan. However, the thin fan is susceptible to the pressure of the panel touch or the keyboard knock, the product placement deviation or the product vibration, which can easily cause damage to the fan wheel or deformation of the flow channel to prevent the airflow from flowing out smoothly. Therefore, how to solve the above-mentioned problems and deficiencies is the direction that the inventors of this case and the related manufacturers engaged in this industry urgently want to study and improve.

In order to improve the above-mentioned problems, an object of the present invention is to provide a pressure-resistant fan structure that prevents external units such as a keyboard or a casing or a panel from compressing the fan wheel and or the flow channel in the fan frame.

Another object of the present invention is to provide a support shaft supporting a fan wheel arranged 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, and has maintained an axial direction The space is between the external unit and the fan wheel to at least prevent the fan wheel from being compressed by the external unit.

Another object of the present invention is to provide a flow channel of a fan frame with at least one supporting column supporting a convex body on the outer surface of the fan frame through the convex body to maintain an axial space between the external unit and the fan frame .

In order to achieve the above objective, the present invention provides a pressing fan structure, which includes: a fan frame with an upper shell and a lower shell, the upper shell has an air inlet, the lower shell has a coupling seat, and a fan wheel with A top wall and a ring wall, the top wall corresponds to the air inlet and has a central perforation and a downward protruding fan wheel A 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 are arranged on the outer ring seat and the inner ring seat Between a holding element and a plurality of rolling elements, the outer ring seat is positioned in the fan wheel shaft barrel, the inner ring seat forms a set of connecting holes; a support shaft has a fixed end connected with the joint seat, and an extension end The sleeve hole extending through the rolling bearing is perforated from the center of the fan wheel beyond the air inlet, supporting the fan wheel and the rolling bearing are arranged in the fan frame, and a protruding section is formed from the extension end to protrude the fan wheel The top wall of the fan frame and the upper shell of the fan frame, the protruding section has an abutting surface; a certain sub-group, arranged on an outer side of the coupling seat and spaced apart from the magnetic elements corresponding to the fan wheel; a thrust element, through the sleeve The supporting shaft is located between the rolling bearing and the coupling seat.

The aforementioned support shaft is provided with a neck portion 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 lateral air outlet defined between the upper shell and the lower shell, and defines a flow path between the fan wheel and the lateral air outlet; the fan wheel system is a centrifugal fan wheel at A horizontal direction corresponds to the lateral air outlet.

The aforementioned flow channel is provided with at least one supporting column having two ends respectively abutting against the 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 supporting column, The convex body has a top contact surface aligned with the contact surface of 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-shaped buckle or an O-shaped buckle.

The aforementioned stator assembly 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 outside of the coupling seat; and a plurality of coils wound around the silicon steel sheet group .

The aforementioned thrust element is a spring.

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

The central perforation of the top wall is provided with a stopper, and the stopper is horizontally protruded from the top wall toward a center of the central perforation, and the rolling bearing abuts against the stopper.

The coupling base has a lower end surface of the coupling base, the fixed end of the support shaft has a lower end surface of the support shaft aligned with the lower end surface of the coupling base, and the lower end surface of the coupling base and the lower end surface of the support shaft protrude from the lower shell of the fan frame Align the bottom joint surface of the lower shell convex body, and the lower end surface of the coupling 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 fan frame .

10: Fan frame

101: upper shell

1011: inside

1012: outside

1013: Upper shell convex

10131: top joint

102: lower shell

1021: Inside

1022: outside

1023: lower shell convex

10231: bottom junction

103: Air inlet

104: Combination seat

1041: Combination seat lower end surface

105: side wall

106: Lateral air outlet

107: Runner

108: support column

20: Fan wheel

201: Top Wall

202: Ring Wall

203: central perforation

2031: stop

204: Fan wheel shaft cylinder

205: Magnetic components

207: Blade

21: Rolling bearing

211: Outer ring seat

212: inner ring seat

213: rolling element

214: Keep component

215: socket hole

22: Support shaft

221: fixed end

2211: Lower end of support shaft

222: Extension

223: protruding section

2231: contact surface

224: neck

23: Thrust element

231: first end

232: second end

25: limit element

30: stator group

301: circuit board

302: Silicon steel sheet group

303: Center through hole

304: upper insulation frame

305: lower insulation frame

306: Coil

40a, 40b: external unit

S1: first axial space

S2: second axial space

Figure 1 is a three-dimensional exploded schematic view of the present invention; Figure 2 is a partial exploded schematic view of the present invention; Figure 3 is a three-dimensional schematic view of the present invention; Figure 4 is a schematic cross-sectional view of the present invention; Figure 5A is the present invention Schematic diagram with external units; Figure 5B is a partial enlarged schematic diagram of Figure 5A.

The above-mentioned objects and structural and functional characteristics of the present invention will be described based on the preferred embodiments of the accompanying drawings.

Please refer to Figure 1 for a three-dimensional exploded schematic view of the present invention; Figure 2 is a partially exploded schematic view of the present invention; Figure 3 is a three-dimensional schematic view of the present invention; Figure 4 is a schematic cross-sectional view of the present invention. As shown in the figure, the present invention includes a fan frame 10 and a fan wheel 20 and a certain subgroup 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 There is an air inlet 103, the lower shell 102 has a coupling seat 104, a side wall 105 and a lateral air outlet 106 are defined between the upper shell 101 and the lower shell 102. This drawing shows that the side wall 105 is arranged at The lower shell 102 extends vertically and connects The upper shell 101 is connected, but is not limited to this. In another embodiment, the side wall 105 may be arranged around the upper shell 101 and extend vertically to connect with the lower shell 102.

A flow channel 107 is defined between the fan wheel 20 and the lateral air outlet 106. The flow channel 107 is provided with at least one support column 108 having two ends respectively abutting against the upper shell 101 and the lower shell 102 with an inner surface 1011. 1021, and an outer surface 1012, 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 The top joint surface 10131 and the lower shell convex body 1023 have a bottom joint surface 10231. In this drawing, it is shown that each of the two supporting columns 108 corresponds to an upper shell convex body 1013 and a lower shell convex body 1023 respectively.

The fan wheel 20 is, for example, a centrifugal fan wheel connected to the lateral air outlet 106 via 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 center. The perforation 203 protrudes downwardly with a fan wheel shaft cylinder 204. The central perforation 203 is provided with a stopper 2031 which protrudes horizontally from the top wall 201 toward a center of the central perforation 203. The blade 207 and a magnetic element 205 such as a ring magnet are provided on an inner side of the ring wall 202.

A rolling bearing 21 is housed in the fan wheel shaft cylinder 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 or needles or rollers). A retaining 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. The outer ring seat 211 is, for example, tightly fitted. The contact is fixed in the fan wheel shaft cylinder 204.

A supporting shaft 22 has a fixed end 221 connected to the coupling seat 104, and an extension end 222 extending through the sleeve hole 215 of the rolling bearing 21 to exceed (extend) out of the air inlet 103 from the central hole 203 of the fan wheel 20 , Further supporting the fan wheel 20 and the rolling bearing 21 are arranged in the fan frame 10, and the support shaft 22 forms a protruding section 223 from the extending end 222 to protrude from the top wall 201 of the fan wheel 20 and the fan frame 10. In the upper shell 101, the protruding section 223 has an abutting surface 2231 aligned with the top surface 10131 of the upper shell protrusion 1013. Furthermore, the support shaft 22 is provided with a neck 224 at the extension end 223 by a limiting element 25 (for example, C-shaped A retaining ring or O-shaped retaining ring) is connected, the neck 224 and the limiting element 25 correspond to the central perforation 203 of the top wall 201 of the fan wheel 20, and the limiting element 25 is positioned 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 coupling seat 104. The thrust element 23 has a first end 231 that contacts the rolling bearing 21 and a second The end 232 contacts the coupling seat 104, and the thrust element 23 is, for example, a spring that elastically presses against the rolling bearing 21 below the rolling bearing 21, except for receiving the axial force of the rolling bearing 21 during operation, and interacting with the upper part of the rolling bearing 21. The limiting element 25 jointly limits the axial displacement of the rolling bearing 21.

The stator assembly 30 is arranged on an outer side of the coupling base 104 and corresponds to the magnetic element 205 of the fan wheel 20. The stator assembly 30 includes a circuit board 301 and a silicon steel sheet group 302 arranged 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 outside of the coupling base 104. The silicon steel sheet group 302 is sandwiched between an upper insulating frame 304 and a lower insulating frame 305, and a plurality of coils 306 are wound around the The silicon steel sheet group 302 and the upper and lower insulating frames 304 and 305.

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

Please continue to refer to FIG. 5A for a schematic diagram of the present invention and external units; FIG. 5B is a partial enlarged schematic diagram of FIG. 5A. The fan in this case is set in an electronic device to help dissipate the internal heating elements. The electronic device in this case represents a laptop, but it is not limited to this. It can also be a tablet computer or a mobile phone or a handheld game console or other handheld electronic products. In this embodiment, an external unit 40a is, for example, a keyboard, but in other embodiments, such as a touch panel or touch pad, or a casing or a casing system located above the fan frame 10, the protruding section 223 of the support shaft 22 The contact surface 2231 and the top contact surface 10131 of the upper shell protrusion 1013 together bear Abut the external unit 40 to form a first axial space S1 between the external unit 40 a and the upper shell 101 of the fan frame 10.

When the outer unit 40a is pressed, the outer unit 40a generates a downward pressing force. The contact surface 2231 of the protruding section 223 of the support shaft 22 and the top contact surface 10131 of the upper shell protrusion 1013 bear the pressure of the outer unit 40 Compression force, and the first axial space S1 provides a space for the external unit 40a to be pressed to produce a short depression and slight deformation, preventing the external unit 40a from pressing the fan wheel 20 and/or the flow channel 107 in the fan frame 10, Prevent the fan wheel 20 from being compressed and unable to operate and/or prevent the runner 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 shell protrusion 1023 abut against another external unit 40b located below the fan frame 10 in this embodiment, for example, it is a cabinet, but In other embodiments, for example, it is a touch panel or a touch pad or a keyboard, and a second axial space S2 is formed between the other external unit 40b and the lower shell 102 of the fan frame 10. This prevents another external unit 40b from compressing the fan wheel 20 and/or the flow passage 107 in the fan frame 10, prevents the fan wheel 20 from being compressed and cannot operate, and/or prevents the flow passage 107 from being compressed 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 present invention has been described in detail above, but what is described above is only a preferred embodiment of the present invention, and should not limit the scope of implementation of the present invention. That is to say, all equal changes and modifications made in accordance with the scope of application of the present invention should still be covered by the patent of the present invention.

10: Fan frame

101: upper shell

1011: inside

1012: outside

1013: Upper shell convex

10131: top joint

102: lower shell

1021: Inside

1022: outside

1023: lower shell convex

10231: bottom junction

103: Air inlet

104: Combination seat

1041: Combination seat lower end surface

105: side wall

107: Runner

108: support column

20: Fan wheel

201: Top Wall

202: Ring Wall

204: Fan wheel shaft cylinder

205: Magnetic components

207: Blade

21: Rolling bearing

22: Support shaft

221: fixed end

2211: Lower end of support shaft

223: protruding section

2231: contact surface

23: Thrust element

25: limit element

30: stator group

Claims (10)

A pressure-resistant fan structure, comprising: a fan frame with an upper shell and a lower shell, the upper shell has an air inlet, the lower shell has a coupling seat; a fan wheel has a top wall and a ring wall, the The top wall corresponds to the air inlet and has a central perforation and a fan wheel shaft cylinder protruding downwards. An outer side of the ring wall is provided with a plurality of blades, and an inner side of the ring wall is provided with a magnetic element; a rolling bearing with an outer A ring seat and an inner ring seat, a holding element and a plurality of rolling elements arranged between the outer ring seat and the inner ring seat, the outer ring seat contacts the fan wheel shaft cylinder, and the inner ring seat forms a set of connecting holes ; A support shaft with a fixed end and the coupling seat combined, and an extended end extending through the sleeve hole of the rolling bearing, from the center of the fan wheel, beyond the air inlet to support the fan wheel and the rolling bearing is arranged in the fan In the frame, a protruding section protruding from the top wall of the fan wheel and the upper shell of the fan frame is formed from the extending end, and the protruding section has an abutting surface and protruding from the fan frame to receive the fan wheel An upper external unit, maintaining an axial space between the fan wheel and the external unit; a certain sub-group, arranged on an outer side of the coupling seat and spaced apart from the magnetic elements corresponding to the fan wheel; a thrust element, The supporting shaft is sleeved and located between the rolling bearing and the combined seat. For the compression-resistant fan structure described in item 1 of the scope of patent application, the support shaft has a neck portion 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 center of the top wall of the fan wheel is perforated. According to the pressure-resistant fan structure described in item 1 of the scope of patent application, the thrust element has a first end contacting the rolling bearing and a second end contacting the coupling seat. As for the pressure-resistant fan structure described in item 1 of the scope of patent application, the fan frame has a side wall and a lateral air outlet defined between the upper shell and the lower shell, and a flow path is defined between the fan wheel and the Between the lateral air outlets; the fan wheel train is a centrifugal fan wheel and communicates with the lateral air outlet via the flow channel. The pressure-resistant fan structure described in item 4 of the scope of patent application, wherein the flow channel is provided with at least one support column having two ends respectively abutting an inner surface of the upper shell and the lower shell, and the upper shell and the lower shell An upper shell convex body and a lower shell convex body are respectively provided on the two ends of the supporting column, wherein the upper shell convex body has a top contact surface aligned with the contact surface of the protruding section of the support shaft, and the lower shell The convex body has a bottom joint surface, and the abutment surface of the convex section and a top joint surface of the upper shell convex body receive the outer unit, and a first axial space is between the outer unit and the upper shell of the fan frame between. For the compression-resistant fan structure described in item 2 of the scope of patent application, the limiting element is a C-shaped buckle or an O-shaped buckle. In the compression-resistant fan structure described in item 1 of the scope of patent application, the thrust element is a spring. In the compression-resistant fan structure described in item 1 of the scope of patent application, the plurality of rolling elements of the rolling bearing include any one of balls, needles, and rollers. For the compression-resistant fan structure described in item 1 of the scope of patent application, the central perforation of the top wall is provided with a stopper, and the stopper protrudes from a center horizontally protruding from the top wall toward the central perforation, and the rolling bearing resists Rely on the stopper. The compression-resistant fan structure described in item 5 of the scope of patent application, wherein the coupling base has a lower end surface of the coupling base, the fixed end of the support shaft has a lower end surface of the support shaft aligned with the lower end surface of the coupling base, and the coupling base The lower end surface and the lower end surface of the support shaft protrude from the lower shell of the fan frame to align with the bottom joint surface of the lower shell convex body, and the lower end surface of the coupling seat and the lower end surface of the support shaft bear The other external unit forms a second axial space between the other external unit and the lower shell of the fan frame.

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