CN103185026A

CN103185026A - Radiating fan

Info

Publication number: CN103185026A
Application number: CN2011104505552A
Authority: CN
Inventors: 张梅
Original assignee: Furui Precise Component Kunshan Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Furui Precise Component Kunshan Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2011-12-29
Filing date: 2011-12-29
Publication date: 2013-07-03
Anticipated expiration: 2031-12-29
Also published as: CN103185026B; TW201326566A

Abstract

The invention relates to a radiating fan, which comprises a fan frame, and a stator and a rotor which are contained in the fan frame. The fan frame comprises a cover plate and a bottom plate which is spaced from the cover plate and is arranged opposite to the cover plate. The stator is arranged between the cover plate and the bottom plate and is fixedly arranged on the cover plate. The rotor surrounds the periphery of the stator and can rotate relative to the stator. The rotor is spaced from the bottom plate. A boss is convexly arranged towards the rotor on the bottom plate. When the rotor downwards rotates towards the bottom plate and runs out of the boss, the boss resists the rotor towards the stator to enable the rotor to spring back towards the stator. In the radiating fan provided by the invention, since the boss is convexly arranged towards the rotor on the bottom plate, when the rotor rotates at high speed or vibrates under the effect of external force to move towards the bottom plate, the boss can resist the rotor, the situation that the radiating fan cannot work normally because the rotor and the stator are separated from each other is avoided and the performance of the radiating fan is stabilized.

Description

Radiation fan

Technical field

The present invention relates to a kind of fan, especially a kind of radiation fan.

Background technique

Traditional radiation fan comprises a fan frame and is contained in an interior stator and the rotor of fan frame.Stator comprises a pedestal that is fixed in the fan frame and is sheathed on a iron core on the pedestal.Pedestal is cylindrical shell empty in, and its inside is provided with snap ring.Rotor comprises that wheel hub, an end of a tubular are fixed in the rotating shaft in the wheel hub and are contained in the interior magnetic group of wheel hub.The other end of rotating shaft is located in the pedestal and engages and supporting wheel hub with snap ring in the pedestal.This kind fan need carry out the combination of rotating shaft and snap ring separately in assembling process, waste man-hour, increases cost.Moreover, if firm being installed on the fan frame of rotor, snap ring inevitable tightly block rotating shaft, so, rotating shaft friction with snap ring in rotation process is bigger, easily damage.If avoid the friction of rotating shaft, on the basis that snap ring is not set and change iron core and magnetic group, make rotor under the effect of the magnetic attraction of unshakable in one's determination and magnetic group and with respect to stator fixedly the time, when rotor is rotating at a high speed or is subjected to external force and in the process that shakes, rotor also very easily breaks away from and then cause the radiation fan cisco unity malfunction with stator.

Summary of the invention

The present invention aims to provide a kind of radiation fan of simple in structure and stable performance.

A kind of radiation fan, comprise a fan frame and be contained in an interior stator and the rotor of fan frame, described fan frame comprise a cover plate and with described cover plate at interval and a base plate that is oppositely arranged, described stator is between described cover plate and the base plate and be fixed on the described cover plate, but described rotor is located in the peripheral and relative stator rotation of stator, described rotor and described base plate arrange at interval, convex with a boss towards rotor on the described base plate, when rotor impacts boss towards the base plate backspin, boss is replaced rotor towards stator, makes described rotor towards the stator resilience.

In the radiation fan of the present invention, because convexing with a boss towards rotor on the base plate, when rotor because rotating at a high speed or being subjected to the external force vibrations under the situation of base plate backspin, because the rotor backspin impacts boss, make boss replace rotor and a spring-back force towards stator is provided towards stator, make rotor avoid rotor and stator to break away from and cisco unity malfunction towards the stator resilience, stablized the performance of radiation fan.

Description of drawings

Fig. 1 is the three-dimensional combination figure of the radiation fan of an embodiment of the present invention.

Fig. 2 is the sectional view of radiation fan shown in Figure 1.

Fig. 3 is the three-dimensional exploded view of radiation fan shown in Figure 1.

Fig. 4 is the inversion figure of Fig. 3.

The primary component symbol description

Radiation fan	1
		The fan frame	10
Cover plate	11
		Base plate	13
Stator	30
		Base	31
Bearing	32
		Circuit board	33
Unshakable in one's determination	35
		Coil	36
Insulating frame	37
		Rotor	50
Wheel hub	51
		Rotating shaft	53
The magnetic group	55
		Flabellum	57
Intake grill	111
		Substrate	113
Rib	115
		Mounting hole	117
Boss	131
		Support arm	133
Positioning arm	135
		Axis hole	321
Sleeved part	351
		Utmost point pawl	353
Body	371
		Armlet	373
Diapire	511
		Sidewall	513
Pedestal	1351
		Latch	1353
Link arm	3531
		Adjutage	3533
Sleeve	3731
		Catch	3733
Axle bed	5112
		Projection	5114

Following embodiment will further specify the present invention in conjunction with above-mentioned accompanying drawing.

Embodiment

See also Fig. 1, Fig. 2 and Fig. 4, the radiation fan 1 of one embodiment of the invention comprises a fan frame 10 and is contained in a stator 30 and a rotor 50 of fanning in the frame 10.

Please further consult Fig. 3 and Fig. 4, this fan frame 10 comprises a cover plate 11 and a base plate 13 that cooperates with cover plate 11.This cover plate 11 is the plate body of a lengthwise, and its middle part offers a circular intake grill 111.One substrate 113 is positioned at this intake grill 111 middle parts, and three ribs 115 are positioned at intake grill 111 and connect cover plate 11 and substrate 113.Four mounting holes 117 are opened in respectively on four jiaos of cover plate 11.

Base plate 13 is that the size of the plate body of a lengthwise and size and cover plate 11 is suitable.The columned boss 131 that this base plate 13 is convexly equipped with towards the upper surface center of cover plate 11.Some support arms 133 and four positioning arm 135 are convexly equipped with towards cover plate 11 from the upper surface of base plate 13.Four positioning arm 135 lay respectively on four jiaos of base plate 13, are used for location cover plate 11.Each positioning arm 135 comprises a pedestal 1351 and a latch 1353.Pedestal 1351 is from base plate 13 upwardly extending round platforms, and its diameter reduces to the upper end away from base plate 13 gradually from the lower end that links to each other with base plate 13.The cylinder of latch 1353 for upwards being convexly equipped with from center, pedestal 1351 top, its diameter is slightly larger than the aperture of cover plate 11 mounting holes 117 less than the diameter of pedestal 1351.Support arm 133 is arranged on four jiaos of peripheries of base plate 13, and for from base plate 13 upwardly extending cylinders, and diameter upwards reduces gradually from base plate 13.Support arm 133 equals positioning arm 135 pedestals 1351 from base plate 13 upwardly extending height and greater than the height of boss 131 from base plate 13 upwardly extending height.

Base plate 13, support arm 133 and positioning arm 135 are the aluminum component of integrally casting moulding, base plate 13 bottoms can directly contact with heat-generating electronic elements and absorb the heat that heat-generating electronic elements distributes, and support arm 133 and positioning arm 135 can outwards be distributed the heat that base plate 13 absorbs.

During 10 assemblings of fan frame, cover plate 11 is positioned at base plate 13 1 sides, and positioning arm 135 is over against the mounting hole 117 of cover plate 11.The latch 1353 of positioning arm 135 insert respectively in the corresponding mounting hole 117 and with cover plate 11 drive fits, the lower surface of cover plate 11 is replaced pedestal 1351 tops of positioning arm 135 and the top of support arm 133.The boss 131 of substrate 113 centers on the base plate 13.

See also Fig. 2 to Fig. 4, this stator 30 comprises a base 31, an iron core 35, a coil 36, a circuit board 33 and an insulating frame 37.This base 31 be tubular and be integrally formed at fan frame 10 substrate 113 lower surface middle part and extend towards base plate 13 from substrate 113.Contain a bearing 32 with axis hole 321 in this base 31.This circuit board 33 is sheathed and be fixed on the base 31 and be attached at substrate 113.In insulating frame 37 is around in iron core 35.Coil 36 windings are on insulating frame 37.Unshakable in one's determination 35 are set on the base 31, and coil 36 electrically connects with circuit board 33.

This iron core 35 is folded to establish mutually by the identical silicon steel sheet of some shapes and is formed.This iron core 35 comprises a circular sleeved part 351 and evenly spaced apart peripheral and be radial outward extending four utmost point pawls 353 in sleeved part 351.The internal diameter of sleeved part 351 equals or is slightly larger than the external diameter of base 31.Base 31 wears sleeved part 351 and is fixed together by bonding mode and sleeved part 351.Each utmost point pawl 353 is roughly T-shaped, comprises from the link arm 3531 of sleeved part 351 outward extending lengthwises and is formed at the adjutage 3533 of link arm 3531 terminal arcs.Adjutage 3533 spaces of four utmost point pawls 353 are positioned on the imaginary annulus that sleeved part 351 is peripheral and this sleeved part 351 is concentric.

This insulating frame 37 comprises the body 371 of a ring-type and outwards is four armlets 373 of radial extension from body 371 outer periphery bottom.This body 371 is corresponding with unshakable in one's determination 35 sleeved part 351, and the internal diameter of body 371 greater than the external diameter of sleeved part 351 in order to sleeved part 351 is enclosed in it.Each armlet 373 comprises sleeve 3731 empty in one and is positioned at two catch 3733 of sleeve 3731 relative both sides.The shape of the shape of sleeve 3731 and the link arm 3531 of unshakable in one's determination 35 utmost point pawl 353 is identical and size is suitable with adjutage 3533, and the link arm 3531 of accommodating corresponding utmost point pawl 353 is in it.Two catch 3733 are for being positioned at sleeve 3731 away from the body 371 1 ends arc lamellar body of both sides up and down, the space arrange and be positioned at the concentric imaginary circumference of body 371 on.The distance that the distance that each catch 3733 along the circumferential direction extends is along the circumferential direction extended less than the adjutage 3533 of utmost point pawl 353.Two catch 3733 of one armlet 373 be convexly set in respectively corresponding utmost point pawl 353 adjutage 3533 two middle side parts up and down and replace adjutage 3533.So, the outer periphery of the adjutage 3533 of each utmost point pawl 353 expose.

Coil 36 is wrapped on the armlet 373 of insulating frame 37, thus this coil 36 via described insulating frame 37 and stator 30 iron cores 35 separately with 35 electrical insulations unshakable in one's determination.

This rotor 50 comprises a wheel hub 51, a rotating shaft 53, a magnetic group 55 and some flabellums 57.This wheel hub 51 is tubular, comprises that the diapire 511 of a circle reaches the sidewall 513 of a ring-type of extending vertically upward from diapire 511 peripheries.The upper face center of this diapire 511 is formed with an axle bed 5112, and lower surface and axle bed 5112 corresponding parts convex with one columned protruding 5114 downwards.This rotating shaft 53 is extended straight up from this axle bed 5112, and forms a free end in the end away from this axle bed 5112.This magnetic group 55 is attached at the internal surface of the sidewall 513 of this wheel hub 51 in the form of a ring.These some flabellums 57 are located on the peripheral of this sidewall 513 and are radial and stretch out.The internal diameter of this magnetic group 55 and this wheel hub 51 is greater than the external diameter of iron core 35 and insulating frame 37.In wheel hub 51 was covered with stator 30 and stator 30 is housed in, magnetic group 55 arranged at interval with unshakable in one's determination 35, and because the magnetic attraction between magnetic group 55 and the iron core 35 makes rotor 50 relative fixed in stator 30 peripheries.In the axis hole 321 of the bearing 32 of the free end insertion base 31 of rotating shaft 53, but and relative stator 30 rotations.In the present embodiment, wheel hub 51 is made by plastic material.

Stator 30 has defined a magnetic attraction zone jointly with rotor 50, namely when rotor 50 rotations, can be along fluctuating on the direction of rotating shaft 53 longitudinal extensions, and rotor 50 can proper functioning under the magnetic attraction effect of stator 30 unshakable in one's determination 35 and rotor 50 magnetic groups 55 rather than the zone that breaks away from stator 30 or interfere with other elements.

Please consult Fig. 2 again, after radiation fan 1 installed, the base plate 13 of fan frame 10 arranged at interval with the diapire of rotor 50 511, the projection 5114 on the boss 131 on the base plate 13 and the diapire 511 over against and arrange at interval.When rotor 50 rotation or under shock conditions, break away from stator 30 and in the process of base plate 13 backspins at a high speed, the projection 5114 of rotor 50 is impacted the boss 131 of base plate 13, thereby make boss 131 provide a spring-back force that makes progress that the rotor 50 of backspin is pushed up to stator 30, in the magnetic attraction zone that rotor 50 is got back to define with stator 30, thereby avoided separating with stator 30.Understandable, this boss 131 can be made by elastic material, and then increases the spring-back force that rotor 50 makes progress.

Among the present invention, because stator 30 and rotor 50 pass through the magnetic attraction relative fixed, thereby avoided the friction of traditional heat-dissipating fan 1 shaft 53 with snap ring, thereby made the performance of radiation fan 1 more stable.Simultaneously, because the base plate 13 at fan frame 10 arranges boss 131, when rotor 50 has the trend that breaks away from the magnetic attraction zone because of the external force influence, this boss 131 can stop the rotor 50 of backspin, guarantee that rotor 50 does not break away from this magnetic attraction zone, thereby avoided separating with stator 30, made the radiation fan 1 can proper functioning.The snap ring that adopts in the abandoning tradition fan of the present invention, and take at the base plate 13 of fan frame 10 mode of boss 131 to be set, not only can make the fan assembling process remove the operation of assembling snap ring from, make assembling more quick, and because saving snap ring, have more cost advantage, make radiation fan of the present invention have more the market competitiveness.

Claims

1. radiation fan, comprise a fan frame and be contained in an interior stator and the rotor of fan frame, described fan frame comprise a cover plate and with described cover plate at interval and a base plate that is oppositely arranged, described stator is between described cover plate and the base plate and be fixed on the described cover plate, but described rotor is located in the peripheral and relative stator rotation of stator, it is characterized in that: described rotor and described base plate arrange at interval, convex with a boss towards rotor on the described base plate, when rotor impacts boss towards the base plate backspin, boss is replaced rotor towards stator, makes described rotor towards the stator resilience.

2. radiation fan as claimed in claim 1, it is characterized in that: described rotor convexes with a projection towards a middle side part of base plate, described projection and described boss over against and arrange at interval.

3. radiation fan as claimed in claim 2, it is characterized in that: described rotor comprises a wheel hub, and described wheel hub comprises a diapire and a sidewall that extends towards cover plate from the diapire periphery, and described sidewall encloses described stator, and described projection is convexly equipped with from described diapire.

4. radiation fan as claimed in claim 3, it is characterized in that: described stator comprises a base that is fixed in cover plate and is sheathed on a iron core on the base, described rotor further comprises the outer some flabellums of sidewall that are arranged at wheel hub, be contained in a magnetic group in the sidewall of wheel hub and an end and be fixed in a rotating shaft on the described diapire, the other end of described rotating shaft inserts described base, described magnetic group encloses described iron core and arranges with described interval unshakable in one's determination, producing between described magnetic group and the described iron core has magnetic attraction, described magnetic attraction to support described rotor and described stator relative fixed.

5. radiation fan as claimed in claim 4 is characterized in that: described iron core comprise one be sheathed on the base sleeved part and from the outward extending some utmost point pawls of described sleeved part outer periphery, described magnetic group is a magnet ring.

6. radiation fan as claimed in claim 4, it is characterized in that: described stator also comprises an insulating frame, in described insulating frame is around in described iron core.

7. radiation fan as claimed in claim 6, it is characterized in that: described stator further comprises the coil of winding on insulating frame.

8. radiation fan as claimed in claim 1, it is characterized in that: described boss is made by elastic material.

9. radiation fan as claimed in claim 1, it is characterized in that: described cover plate offers some mounting holes, described base plate comprises some positioning arm of extending towards cover plate, each positioning arm comprises a pedestal that connects cover plate and a latch that is positioned at the pedestal top, described latch wears the mounting hole of cover plate and closely cooperates with cover plate, and cover plate is replaced towards a side surface of base plate in the top of described pedestal.

10. radiation fan as claimed in claim 9, it is characterized in that: further convex with some support arms towards cover plate on the described base plate, described cover plate is replaced towards a side surface of base plate in the top of described support arm.