TWI697625B - Pressproof fan structure - Google Patents

Abstract

An anti-pressing fan structure, comprising: a fan frame with an upper shell and a lower shell, the upper shell has an air inlet; a support shaft, one end is inserted into one side of the lower shell, and the other end protrudes beyond the upper shell Shell; an oil-impregnated bearing with a bearing hole and sleeved outside the support shaft; a rotor assembly, sleeved and combined with the outer edge of the oil-impregnated bearing; a limiting element sleeved on the outer edge of the support shaft and close to the oil-impregnated bearing Upper end; a thrust element, sleeved on the outer edge of the support shaft and close to the lower end of the oil-impregnated bearing; a certain sub-set, arranged in the lower shell and adjacent to the outer edge of the oil-impregnated bearing and does not contact the oil-impregnated bearing. With the above structure, the support shaft is used to support the fan to prevent the fan from stopping or damaging due to excessive downward pressure on an external unit above the fan, thereby achieving the purpose of preventing the fan from being pressed.

Description

Anti-press fan structure

The invention relates to the field of fans, in particular to an anti-pressing fan structure.

According to, 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 with light and thin design considerations Trend, in order to comply with the current trend of lightness and thinness, the current fan is designed as a thin fan. However, the thin fan is susceptible to being pressed by the panel or keyboard, causing damage to the fan wheel or deformation of the flow channel to prevent the wind from flowing out.

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 an anti-pressing fan structure that prevents external units such as a keyboard or a housing or a panel from compressing the rotor group or fan frame.

Another object of the present invention is to provide a support shaft supporting a rotor set in a fan frame, the support shaft has a protruding section protruding from the rotor set and the fan frame to receive an external unit, and an axial space is maintained Between the external unit and the rotor group, at least the rotor group is prevented 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. The convex body maintains an axial space between the external unit and the fan frame , At least prevent the flow channel from being compressed by the external unit.

To achieve the above objective, the present invention provides an anti-pressing fan structure, which includes: a fan frame with an upper shell and a lower shell, the upper shell has an air inlet; a support shaft, one end of which is inserted into the lower shell Side, the other end protrudes beyond the upper shell; an oil-impregnated bearing with a bearing hole and sleeved on the outside of the support shaft; a rotor assembly sleeved and combined with the outer edge of the oil-impregnated bearing; a limiting element sleeved on the The outer edge of the support shaft is close to the upper end of the oil-impregnated bearing; a thrust element is sleeved on the outer edge of the support shaft and is close to the lower end of the oil-impregnated bearing; and a certain subgroup is arranged on the lower shell and adjacently surrounds the outer end of the oil-impregnated bearing Edge and do not contact the oil-impregnated bearing.

With the above structure, when downward pressure is generated, the two ends of the support shaft respectively contact the operating area of the electronic device and the inside of the housing to prevent the downward pressure from being transmitted to the guide rotor group or the upper housing, causing the fan to stop rotating or deform and damage. To achieve the purpose of fan compression.

1: fan frame

11: Upper shell

12: Lower shell

121: sidewall

122: Pedestal

1221: Lower end of the base

123: Shaft tube

13: Air inlet

14: Air outlet

15: fan area

16: runner area

17: Support column

18: Upper shell convex

181: top joint

19: Lower shell convex

191: bottom junction

2: Support shaft

21: Combined segment

211: contact surface

22: Convex section

23: protruding section

231: contact surface

3: Oil bearing

31: Bearing hole

32: Upper end face

321: Groove

33: Lower end

331: Groove

4: Rotor group

41: Wheel hub

42: blade

43: Magnetic components

5: Limiting element

6, 6a: Thrust element

61, 61a: First side

611, 611a: groove part

62, 62a: second side

7: stator group

71: circuit board

72: stator body

721: Shaft Hole

722: pole

73: Coil

8a, 8b: external unit

S1: first axial space

S2: second axial space

Figure 1A is an exploded schematic view of the first embodiment of the present invention; Figure 1B is a schematic view of the assembly of the first embodiment of the present invention; Figure 1C is a schematic cross-sectional view of the first embodiment of the present invention; Figure 1D is a diagram of Figure 1C Partial schematic view; Figure 2A is a schematic cross-sectional view of the second embodiment of the present invention; Figure 2B is a partial schematic view of the second embodiment of the present invention; Figure 3A is a schematic cross-sectional view of the third embodiment of the present invention; Figure 3B is A partial schematic diagram of the third embodiment of the present invention; Fig. 4 is a partial schematic diagram of the fourth embodiment of the present invention; Fig. 5 is a cross-sectional schematic diagram of the present invention applied to an electronic device.

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 1A, Figure 1B, Figure 1C and Figure 1D, which are the exploded schematic diagram, combined schematic diagram, cross-sectional schematic diagram and partial schematic diagram of Figure 1C of the first embodiment of the present invention. The present invention mainly includes a frame 1 , A supporting shaft 2, an oil-impregnated bearing 3, a rotor group 4, a limiting element 5, a thrust element 6 and a fixed subgroup 7: The fan frame 1 includes an upper shell 11 and a lower shell 12. The outer edge of the lower shell 12 extends vertically with a side wall 121 and surrounds an air outlet 14 to form an air inlet 13 on the upper shell 11, the upper shell 11 and the The side walls 121 of the lower shell 12 are combined to define a fan area 15 and a flow channel area 16. The flow channel area 16 is provided with at least one support column 17, and both ends of the support column 17 abut the upper shell 11 and the The lower shell 12 supports the flow channel area 16, the position of the air inlet 13 corresponds to the upper part of the fan blade area 15, the lower shell 12 has a base 122, the support shaft 2 is disposed on the base 122, and the base The base 122 has a lower end surface 1221, and the stator assembly 7 surrounds the outer edge of the base 122 adjacently.

The support shaft 2 has a coupling section 21, a protruding section 22, and a protruding section 23. The coupling section 21 is disposed on the base 122. The protruding section 22 and the protruding section 23 face the upper shell 11, and The protruding section 23 protrudes from the air inlet 13, the coupling section 21 has an abutting surface 211, and the protruding section 23 has an abutting surface 231.

The oil-containing bearing 3 has a bearing hole 31 and is sleeved on the protruding section 22 of the supporting shaft 2.

The rotor assembly 4 is sleeved and coupled to the outer edge of the oil-impregnated bearing 3, the rotor assembly 4 includes a hub 41 sleeved and coupled to the outer edge of the oil-impregnated bearing 3; a plurality of blades 42 respectively extend outward from the outer periphery of the hub 41; And a magnetic element 43 arranged on the inner periphery of the hub 41 and horizontally opposite to the stator assembly 7. The magnetic element 43 is, for example, a ring magnet.

The limiting element 5 is sleeved on the protruding section 22 of the support shaft 2 and close to the upper end of the oil-containing bearing 3, and the limiting element 5 is a C-shaped buckle ring or an O-shaped buckle ring.

The thrust element 6 is sleeved on the protruding section 22 of the support shaft 2 and is close to the lower end of the oil-containing bearing 3. The thrust element 6 has a first surface 61 and a second surface 62, and the first surface 61 has A groove portion 611, the first surface 61 faces the oil-containing bearing 3, and the second surface 62 faces the lower shell 12.

The stator assembly 7 is arranged on one side of the lower shell 12 and adjacently surrounds the outer edge of the oil-impregnated bearing 3 and is not in contact with the oil-impregnated bearing 3. The stator assembly 7 includes a circuit board 71; a stator body 72 is arranged on the The circuit board 71 is composed of a plurality of silicon steel sheets stacked in sequence. The stator body 72 has a shaft hole 721 and a plurality of poles 722; and a plurality of coils 73 are respectively disposed on the poles 722.

In particular, the oil-impregnated bearing 3, the limiting element 5, and the thrust element 6 are disposed on the protruding section 22, and the support column 17 has two ends that abut the upper shell 11 and the lower shell 12, respectively. An inner surface of the upper shell 11 and an outer surface of the lower shell 12 are respectively provided with an upper shell protrusion 18 and a lower shell protrusion 19 corresponding to the two ends of the support column 17, the upper shell protrusion 18 has a top The contact surface 181 is aligned with the contact surface 231 of the protruding section 23 of the support shaft 2, the lower end surface 1221 of the base is provided with the lower shell protrusion 19, the contact surface 211 of the connecting section 21 and the lower end surface 1221 of the base In contact with the lower shell convex body 19, the lower shell convex bodies 19 have a bottom joint surface 191, and the bottom joint surfaces 191 are aligned with each other.

Please also refer to Figure 5, which is a cross-sectional schematic diagram of the application of the present invention to electronic devices, and supplemented by referring to Figures 1A to 1D. The fan in this case is installed in an electronic device to help internal heating elements dissipate heat. The device diagram 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. An external unit 8a is a keyboard in this embodiment, but in other embodiments a touch panel or touch The board or casing is located above the fan frame 10, and the abutting surface 231 of the protruding section 23 and the top abutting surface 181 of the upper shell protrusion 18 receive an external unit 8a, and form a first axial space S1 outside Between the section unit 8 and the fan frame 1, when the external unit 8a of the electronic device is used to generate down force, the runner area 16 is supported through the support column 17 and the support shaft 2 supports the fan area 15 and maintains the axial direction. The space S, and the first axial space S1 provides a space for the external unit 8a to be pressed to produce short-term downward pressure and slight deformation, so as to prevent the external unit 8a from compressing the oil bearing 3, the hub 41, and the upper shell 11 to ensure that the hub 41 rotates The rotation of the upper shell 11 will not be stopped due to pressure, and the upper shell 11 will not deform and interfere with the rotation of the blade 42.

Furthermore, the lower shell protrusions 19 abut against another external unit 8b located under the fan frame 1 in this embodiment, for example, a case, but in other embodiments, for example, a touch panel or a touch pad or a keyboard. A second axial space S2 is formed between the other external unit 8b and the lower shell 12 of the fan frame 1. This prevents another external unit 8b from compressing the fan region 15 or the runner region 16 in the fan frame 1, preventing the hub 41 from being compressed and unable to operate and/or preventing the runner region 16 from being compressed and deformed

In addition, the groove portion 611 on the first surface 61 of the thrust element 6 is matched with the groove portion 611 to generate a fluid thrust when the oil-impregnated bearing 3 rotates, so that the oil-impregnated bearing 3 and the thrust element 6 are held together. The clearance prevents the oil bearing 3 from shaking in the axial direction of the supporting shaft 2 when the oil bearing 3 rotates, affecting the stability and contact wear when rotating.

Please refer to Figures 2A and 2B, which are cross-sectional schematic diagrams and partial schematic diagrams of the second embodiment of the present invention, supplemented by referring to Figures 1A to 1D. This embodiment is substantially the same as the first embodiment, so it is the same No more details, the main difference is that another thrust element 6a is arranged between the oil-impregnated bearing 3 and the limiting element 5. The first surface 61a of the thrust element 6a faces the oil-impregnated bearing 3, and the second surface 62a Toward the limiting element 5, the first surface 61a has a groove portion 611a.

When the oil-impregnated bearing 3 rotates, the groove parts 611, 611a will generate a fluid thrust, so that the oil-impregnated bearing 3 and the thrust element 6, 6a maintain a gap, respectively, to prevent the oil-impregnated bearing 3 from shaking along the axial direction of the support shaft 2 when it rotates. Affects stability and contact wear during rotation, and achieves bidirectional stability.

Please refer to Figures 3A and 3B, which are cross-sectional schematic diagrams and partial schematic diagrams of the third embodiment of the present invention, supplemented by referring to Figures 1A to 1D. This embodiment is substantially the same as the first embodiment, so the same The details are not repeated here. The main difference is that the support column 17 of this embodiment is directly coupled to the lower shell 12, and the lower shell 12 has a shaft cylinder 123, and the stator assembly 7 surrounds the outer edge of the shaft cylinder 123 adjacently, thereby eliminating了base 122.

In addition, although only one thrust element 6 is used in the figure of the third embodiment, it can actually be used in conjunction with the technical features of the second embodiment. Another thrust element is provided between the oil-impregnated bearing 3 and the limiting element 5. Component 6a (please refer to Figure 2A and Figure 2B) achieves bidirectional stability.

Figure 4 is a partial schematic diagram of the fourth embodiment of the present invention, supplemented by referring to Figures 1A to 1D. This embodiment is roughly the same as the first embodiment, so the same parts will not be repeated. The main difference lies in this embodiment. For example, the upper end surface 32 of the oil-impregnated bearing 3 is provided with a groove portion 321 and the lower end surface 33 is provided with a groove portion 331, so that when the oil-impregnated bearing 3 rotates, a fluid thrust is generated, so that the oil-impregnated bearing 3 is directly connected to the thrust element 6 and the base. 122 maintains a gap, thereby eliminating the thrust element 6.

In addition, although the fan frame 1 used in the figure of the fourth embodiment has a base 122, it can actually be applied with the technical features of the third embodiment without the base 122.

In summary, the present invention has the following advantages: 1. Prevent external units from oppressing the runners in the rotor assembly and or fan frame; 2. Maintain the first and second axial spaces between the external unit and the hub, At least prevent the rotor group from being compressed by the external unit; 3. Maintain the first and second axial spaces between the external unit and the lower shell of the fan frame to prevent the flow channel from being compressed by the external unit.

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, all equal changes and modifications made according to the scope of application of the present invention should still be covered by the patent of the present invention.

1221: Lower end of the base

17: Support column

18: Upper shell convex

181: top joint

19: Lower shell convex

191: bottom junction

211: contact surface

231: contact surface

3: Oil bearing

41: Wheel hub

42: blade

8a, 8b: external unit

S1: first axial space

S2: second axial space

Claims (14)

An anti-pressing fan structure, comprising: a fan frame with an upper shell and a lower shell, the upper shell has an air inlet; a support shaft with a coupling section and a protruding section, the coupling section is inserted in the aforementioned On one side of the lower shell, the protruding section protrudes beyond the upper shell; an oil-impregnated bearing with a bearing hole and sleeved on the outside of the support shaft; a rotor assembly, sleeved and combined with the outer edge of the oil-impregnated bearing, the aforementioned protruding section The rotor group and the fan frame are protruded to receive an external unit to maintain a first axial space between the external unit and the rotor group; a limiting element is sleeved on the outer edge of the support shaft and is close to the The upper end of the oil-impregnated bearing; a thrust element sleeved on the outer edge of the support shaft and close to the lower end of the oil-impregnated bearing; and a certain sub-set, arranged on the lower shell and adjacent to the outer edge of the oil-impregnated bearing and not connected contact. According to the anti-pressing fan structure described in item 1 of the scope of patent application, the supporting shaft has a protruding section, the coupling section is disposed on the lower shell, the protruding section and the supporting end face the upper shell, and the protruding section A section protrudes from the air inlet, the oil-containing bearing, the limiting element and the thrust element are arranged on the protruding section, and the protruding section has an abutting surface. The anti-pressing fan structure described in item 2 of the scope of patent application, wherein the lower shell has a base, the connecting section of the supporting shaft is disposed on the base, the stator group is adjacently surrounding the outer edge of the base, and the The base has a lower end surface of the base. According to the anti-pressing fan structure described in item 3 of the scope of patent application, the outer edge of the lower casing extends vertically with a side wall and surrounds to form an air outlet, and the side walls of the lower casing jointly define A fan area and a flow channel area, the flow channel area is provided with at least one support column, the support column has two ends abutting the upper shell and the lower shell, respectively, and the upper shell and the lower shell An upper shell convex body and a lower shell convex body are respectively provided on an outer surface to correspond to the two ends of the support column. The upper shell convex body has a top contact surface aligned with the contact surface of the projecting section of the support shaft, and the projecting section The abutting surface of the upper shell convex body and a top surface of the upper shell convex body receive the outer unit and form the first axial space between the outer unit and the fan frame. The lower shell convex body has a bottom connecting surface , The lower end surface of the base and the bottom connecting surface receive another external unit and form a second axial space between the other external unit and the fan frame. The anti-pressing fan structure described in item 4 of the scope of patent application, wherein the lower end surface of the base is provided with the lower shell protrusion, and an abutting surface of the coupling section and the lower end surface of the base are in contact with the lower shell protrusion . According to the anti-pressing fan structure described in item 1 of the scope of the patent application, the thrust element has a first surface and a second surface, the first surface has a groove portion, and the first surface faces the oil-impregnated bearing, The second surface faces the lower shell. The anti-pressing fan structure described in item 5 of the scope of patent application, wherein another thrust element is arranged between the oil-impregnated bearing and the limiting element, the first surface of the thrust element faces the oil-impregnated bearing, and the second surface Towards the limiting element. For the anti-pressing fan structure described in item 1 of the scope of patent application, the limiting element is a C-shaped buckle or an O-shaped buckle. An anti-pressing fan structure comprising: a fan frame with an upper shell and a lower shell, and the upper shell has an air inlet; A support shaft has a coupling section and a protruding section, the coupling section is inserted on one side of the lower shell, and the protruding section protrudes beyond the upper shell; an oil bearing bearing with a bearing hole and sleeved on the support Outside the shaft, the upper end surface and the lower end surface of the oil-impregnated bearing respectively have a groove part; a rotor assembly is sleeved and combined on the outer edge of the oil-impregnated bearing, and the protruding section protrudes from the rotor assembly and the fan frame to receive an external Unit to maintain a first axial space between the external unit and the rotor assembly; a limiting element sleeved on the outer edge of the support shaft and close to the upper end of the oil-impregnated bearing; and a certain sub-assembly arranged on the lower The shell is adjacent to the outer edge of the oil-impregnated bearing and is not in contact with the oil-impregnated bearing. According to the anti-pressing fan structure described in item 9 of the scope of patent application, the support shaft has a protruding section, the coupling section is disposed on the lower shell, the protruding section and the supporting end face the upper shell, and the protruding section A section protrudes from the air inlet, the oil-containing bearing, the limiting element and the thrust element are arranged on the protruding section, and the protruding section has an abutting surface. According to the anti-pressing fan structure described in claim 10, the lower shell has a base, the connecting section of the supporting shaft is disposed on the base, the stator group is adjacently surrounding the outer edge of the base, and the The base has a lower end surface of the base. According to the anti-pressing fan structure described in item 11 of the scope of patent application, the outer edge of the lower shell extends vertically with a side wall and surrounds to form an air outlet. The combination of the side walls of the lower shell jointly defines a fan area and a first channel area, The flow channel area is provided with at least one support column, the support column has an inner surface that abuts against the upper shell and the lower shell at both ends, and an upper shell convex body is respectively provided on an outer surface of the upper shell and the lower shell And the convex body of the lower shell correspond to the two ends of the support column, the upper The shell convex body has a top contact surface aligned with the abutment surface of the protruding section of the support shaft, the abutment surface of the protruding section and a top abutment surface of the upper shell convex body receive the external unit and form a The first axial space is between the external unit and the fan frame, the lower shell protrusion has a bottom joint surface, the lower end surface of the base and the bottom joint surface receive another external unit and form a second axial space Between another external unit and the fan frame. According to the anti-pressing fan structure described in item 12 of the scope of patent application, the lower end surface of the base is provided with the lower shell protrusion, and an abutting surface of the coupling section and the lower end surface of the base are in contact with the lower shell protrusion . For the anti-pressing fan structure described in item 9 of the scope of patent application, the limiting element is a C-shaped buckle or an O-shaped buckle.

Images