CN2456209Y

CN2456209Y - Radiating fan

Info

Publication number: CN2456209Y
Application number: CN 00243546
Authority: CN
Inventors: 林浩正
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-07-11
Filing date: 2000-07-11
Publication date: 2001-10-24
Anticipated expiration: 2010-07-11

Abstract

The utility model relates to a heat radiation fan, which comprises a rotator which is provided with a cover cap, the outer wall of the cover cap is annularly provided with a plurality of blades, and the inner wall and the center of the cover cap are respectively provided with a magnetic element and a rotating shaft. An axial connection component is provided with an oil-retaining bearing and a ball bearing which are sheathed on the top and the bottom ends of the rotating shaft. A base is provided with a shaft pipe in the middle part, the upper end of the shaft pipe is sheathed out of the axial connection component, and a coil component which is extended and arranged in a magnetic element is arranged out of the shaft pipe. The utility model is characterized in that the axial connection component is provided with a spring which is abutted between the oil-retaining bearing and the ball bearing, the spring can provide prepressing elastic force for the ball bearing, so the unstable sound and the angular sound in the high-speed rotation of the radiation fan can be reduced.

Description

Radiator fan

The utility model relates to a kind of radiator fan.

Central processing unit or the bigger electronic component of other consumed powers installed in the general computer motherboard, usually must cooperate during running and take the cooling measure of being correlated with, just can maintain normal operation in the operating temperature range of allowing, and these electronic components outside general common be to dispel the heat by radiating fin and radiator fan collocation setting, and it is little to be subject to the space that the inner ancestral of computer establishes, therefore, usually the volume of this type of radiator fan is basic demand with compact, make its flabellum size also reduce relatively, and the air output that the radiator fan of this type of small size will acquire a certain degree, must cooperate high rotating speed, could loose and remove the heat that electronic component produced.

As shown in Figures 1 and 2, be respectively a kind of view sub-anatomy and assembled sectional view that in the past had high-revolving radiator fan, this radiator fan includes 11, one be coupling assembly 12, the pedestal 13 of turning.

This turns 11, it has an end and seals, holds in addition opening-like cover cap 111, cover cap 111 is provided with most blades 112 at outer wall periphery spaced ring, and be installed with the magnetic element 113 of a loop shaped at inwall, the center is installed with a rotating shaft 114, rotating shaft 114 closely not periphery, end place be concaved with an annular groove 115.

This assembly 12 that is coupling, it has an oiliness bearing 121, a ball bearing 122 and a clasp 120 that can successively be sleeved on above-mentioned rotating shaft 114 outsides, make oiliness bearing 121 be set in rotating shaft 114 the inners, ball bearing 122 is sheathed on rotating shaft 114 outer ends, clasp 120 can use general ringent C type clasp, and is against the annular groove 115 that rotating shaft 114 do not hold and comes off outward to prevent ball bearing 122 with corresponding button of clasp 120.

This pedestal 13, the central siphon 131 that has a hollow in the middle of it, central siphon 131 1 ends can correspondence be sleeved on above-mentioned assembly 12 outsides that are coupling, and externally be installed with one and establish the coil block 132 that forms by silicon steel sheet and coil groups, one circuit substrate 133, coil block 132 is stretched with reserving appropriate intervals to be put in aforementioned magnetic element 113 inside, can the time make magnetic element 113 be excited magnetic induction and drive whole turning in energising and 11 rotate, circuit substrate 1 33 is positioned at magnetic element 113 outside belows, can be fixed on as for whole pedestal 13 ends that institute supports on the radiating fin of putting 14 that is sticked on the electronic component of desire heat radiation, the integral heat sink fan is located.

Since this type of in the past radiator fan have high-revolving characteristic, its per minute changes more than scooter 5000 commentaries on classics, therefore it is formed in the structure, respectively relatively rotate between member, if on cooperating trickle shortcoming is arranged, very easily cause noise to produce,, just have following shortcoming with regard to regard to the structure design of above-mentioned radiator fan in the past:

1, the ball bearing 122 of assembly 12 of being coupling easily produces noise when running up: cooperate Fig. 3 as seen, because the composition of ball bearing 122 is interior, external toroidal ring 123, the recess 125 that 124 forward surfaces are arranged with, 126 are equiped with most balls 127, and in making by means of each ball 127 rolling, external toroidal ring 123,124 are able to rotate relatively swimmingly, in fact ball 127 is installed in recess 125,126, be not to closely cooperate fully, but have trickle space 128, may have only several microns (10-6m) though this space 128 is very small, but under high rotating speed situation, not only become whole ball bearing 122 and rotating shaft 114 unsettled sources, more can make running noise become big, if the integral heat sink fan is to be in the pre-determined tilt angle to turn round, to make ring 123 beats in rotating shaft 114 interlocks, and and 124 generations of external toroidal ring angle, this situation can produce more obvious noise, be commonly called as angle sound, and the unstable noise no matter normal operating condition produced, or the angle sound that caused of inclination user mode, under high rotating speed situation, all become high-quality product the part that must be paid attention to improving.

2, turn and easily produce electromagnetic sound during 11 rotations: because 11 the rotating shaft 114 suit oiliness bearings 121 successively of turning because of rotating shaft 114 axial displacements, behind the ball bearing 122, only borrow clasp 120 to buckle and be butted on the not annular groove 115 at end place, to prevent that ball bearing 122 is toward outer displacement, and in fact when the outside suit ball bearing 122 of rotating shaft 114, must avoid ball bearing 122 to cover annular groove 115, and annular groove 115 width must be slightly larger than clasp 120 thickness, ability is spiral-lock clasp 120 smoothly, therefore can there be a gap 116 unavoidably in ball bearing 122 and 120 of clasps, the existence in this gap 116, to become the space of allowing that rotating shaft 114 and ball bearing 122 are axially being vacillated, cause turning 11 magnetic element 113 during high speed rotating, produce axial relative displacement repeatedly with the coil block 132 on the pedestal 13, and cause electromagnetic sound.

The purpose of this utility model is to provide a kind of radiator fan that unstable sound and angle sound also can reduce electromagnetic sound that reduces.

Radiator fan of the present utility model includes:

One turns, and has one and is provided with the cover cap of most blades at the outer wall spaced ring, and the cover cap inwall sets firmly a magnetic element, and the center has a rotating shaft;

One assembly that is coupling has the oiliness bearing, a ball bearing and the clasp that from top to bottom are set in above-mentioned rotating shaft;

One pedestal has a central siphon in the middle of it, and central siphon upper end correspondence is sleeved on the above-mentioned assembly outside that is coupling, and is provided at an outer portion with one and stretches the coil block of putting in aforementioned magnetic element inside;

It is characterized in that: this assembly that is coupling more includes a spring, this spring is resisted against between oiliness bearing and ball bearing, and provide a precompressed elastic force to ball bearing and rotating shaft, and borrow inside, central siphon lower end to be equiped with a supporting piece, and do not hold in the rotating shaft of this preloading and to be provided with a circular arc end face that is butted on supporting piece, make the unlikely axial displacement of turning, and can reduce unstable sound, angle sound and the electromagnetic sound of radiator fan when high speed rotating.

Described radiator fan is characterized in that: the central siphon of this pedestal is equiped with a supporting piece in inside, lower end, and rotating shaft is not held and is provided with a circular arc end face that is butted on supporting piece.

Described radiator fan, it is characterized in that: this ball bearing is to be equiped with most balls between the recess that a pair of inside and outside ring forward surface is arranged with, and this spring is a tapered spring, have a first end and a second end, this first end diameter is big and be butted on oiliness bearing, and this second end diameter is less and be butted on the interior ring of ball bearing.

Take a broad view of above-mentioned, the utility model can provide a kind of radiator fan really, make it by pocketed springs provided between oiliness bearing and ball bearing precompressed elastic force, and can reduce unstable sound and angle sound, and borrow precompressed elastic force to allow the rotating shaft bottom circular arc end face of turning contact at a supporting piece, in case the magnetic element of spline body produces axial relative displacement with the coil block of pedestal during high speed rotating, and can significantly subdue electromagnetic sound, so very practical really and progressive.

Below by most preferred embodiment and accompanying drawing radiator fan of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is the decomposition diagrammatic cross-section of radiator fan in the past.

Fig. 2 is the combination diagrammatic cross-section of radiator fan in the past.

Fig. 3 is the combination section enlarged diagram of radiator fan shaft and ball bearing region of interest in the past.

Fig. 4 is the decomposition diagrammatic cross-section of the utility model embodiment radiator fan.

Fig. 5 is the combination diagrammatic cross-section of the utility model embodiment radiator fan.

Fig. 6 is the combination section enlarged diagram of the utility model embodiment radiator fan shaft and ball bearing region of interest.

As Fig. 4 and shown in Figure 5, the radiator fan of the utility model embodiment includes 2, one be coupling assembly 3, the pedestal 4 of turning.

This turns 2, it has an end and seals, holds in addition opening-like cover cap 21, cover cap 21 is provided with most blades 22 at outer wall periphery spaced ring, and be installed with the magnetic element 23 of a loop shaped at inwall, the center is installed with a rotating shaft 24, rotating shaft 24 closely not end place outer wall be concaved with an annular groove 241, and the end of its least significant end place has a circular arc end face 242.

This assembly 3 that is coupling, it has an oiliness bearing 31 that can successively be set in above-mentioned rotating shaft 24 outsides, one spring 32, one ball bearing 33 and a clasp 34, oiliness bearing 31 is sleeved on rotating shaft 24 upper ends, spring 32 is placed in the middle, ball bearing 33 is sheathed on rotating shaft 24 lower ends, and borrow corresponding button of clasp 34 to be butted on the annular groove 241 that rotating shaft 24 do not hold and to come off outward to prevent ball bearing 33, above-mentioned spring 32 has a first end 321 and a second end 322, can use tapered spring, first end 321 diameters are big and be butted on oiliness bearing 31, the second end diameter is less and be butted on ball bearing 33, and the elastic force of down precompressed can be provided ball bearing 33 and clasp 34, make 34 unlikely spaces that exist of ball bearing 33 and clasp, and down push rotating shaft 24.

This pedestal 4, the central siphon 41 that has a hollow in the middle of it, central siphon 41 upper end correspondences are linked in above-mentioned assembly 3 outsides that are coupling, and central siphon 41 inwalls can with the oiliness bearing 31 outer wall wringing fits of the assembly 3 that is coupling, central siphon 41 is except that the outside is provided with a coil block 42, a circuit substrate 43, and be equiped with a supporting piece 44 in inside, lower end, supporting piece 44 is to adopt high-abrasive material made, as pottery, quartzy, glass ... Deng, its bottom can be borrowed in central siphon 41 terminus inner spiral-locks one ringent clasp 45, makes supporting piece 44 location.During combination, coil block 42 is to stretch to put in aforementioned magnetic element 23 inside with reserving appropriate intervals, can when switching on, make magnetic element 23 be excited magnetic induction and drive 21 rotations of turning, circuit substrate 43 is positioned at magnetic element 23 belows, and supporting piece 44 be subjected to rotating shaft 24 not the circular arc end face 242 at end place down compress, prevent rotating shaft 24 whereby and 2 axial displacements of turning.Certainly, pedestal 4 bottoms can be fixed on that institute supports on the radiating fin of putting 5 that is sticked on the electronic component of desire heat radiation, and the integral heat sink fan is located.

Cooperate shown in Figure 6, be radiator fan shaft 24 with ball bearing 33 region of interest analyse and observe the combination enlarged drawing, the composition of ball bearing 33 is equally in one pair, external toroidal ring 331, the recess 333 that 332 forward surfaces are arranged with, 334 are equiped with most balls 335, in the present embodiment by first of spring 32, the second end 321,322 are resisted against the interior ring 331 of this oiliness bearing 31 and this ball bearing 33 respectively, and a precompressed elastic force can be provided, with the displacement of down exerting pressure of interior ring 331, in being butted on with making 335 energy while of ball close fit, external toroidal ring 331,332 recesses that are arranged with in opposite directions 333,334, so precompressed elastic force that is provided by 32 pairs of ball bearing 33 of spring, make in balls 335 are housed in the ball bearing 33, external toroidal ring 331, during 332 rollings, the unlikely space that exists, therefore in normal operating condition and inclination user mode, just can effectively improve unstable sound and angle sound.

In addition, the precompressed elastic force that present embodiment medi-spring 32 is provided, interior ring 331 via ball bearing 33 sees through clasp 34, one down precompressed elastic force equally can countershaft 24 be provided, make the circular arc end face 242 that the rotating shaft 242 of preloading is not held, can down correspondingly be pressed against by the made supporting piece 44 of high-abrasive material, it is spacing to allow rotating shaft 24 bottoms obtain, and the unlikely gap of axially vacillating that between on-stream period, produces, when turning 2 magnetic element 23 during high speed rotating, just not can with coil block 42 displacement to axial on the pedestal 4, therefore can significantly subdue the generation of electromagnetic sound, and, add that rotating shaft 24 ends are preset as circular arc end face 242 because supporting piece 44 is made by high-abrasive material, borrow circular arc end face 242 and supporting piece ditch between fields to conflict, make its running more stable with a way of contact, durable.

Claims

1, a kind of radiator fan includes:

It is characterized in that: this assembly that is coupling more includes a spring, and this spring is resisted against between oiliness bearing and ball bearing.

2, radiator fan as claimed in claim 1 is characterized in that: the central siphon of this pedestal is equiped with a supporting piece in inside, lower end, and rotating shaft is not held and is provided with a circular arc end face that is butted on supporting piece.

3, radiator fan as claimed in claim 1, it is characterized in that: this ball bearing is to be equiped with most balls between the recess that a pair of inside and outside ring forward surface is arranged with, and this spring is a tapered spring, have a first end and a second end, this first end diameter is big and be butted on oiliness bearing, and this second end diameter is less and be butted on the interior ring of ball bearing.