CN1139738A

CN1139738A - DC brush free fan

Info

Publication number: CN1139738A
Application number: CN 95107729
Authority: CN
Inventors: 谢新茂
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-30
Filing date: 1995-06-30
Publication date: 1997-01-08
Anticipated expiration: 2015-06-30
Also published as: CN1055352C

Abstract

The present invention relates to a direct-current brushless fan. It is mainly equipped with a bearing seat, and the outside of the bearing seat is equipped with silicon-steel sheets, and a bearing sleeve is placed in the bearing seat. In the appropriate position of internal side surface of said bearing seat several wedge blocks are formed, and corresponding to the bearing sleeve to form straight slots. The internal space of the bearing sleeve is divided into upper space and lower space by wedge blocks, so that the oilless bearing or ball bearing can be placed so as to implement mutual limiting coordination between silicon-steel sheets, bearing seat, bearing sleeve and bearing, and all the components are positioned in their respective proper positions, so that it can ensure accuracy of the bearing sleeve in size.

Description

The brush DC fan

The present invention relates to a kind of brush DC fan, mainly be that bearing support inner side surface at its framework is provided with the bearing housing that can install self-lubricating bearing or ball bearing, the bearing housing that size requirement is higher separates moulding, with the validity of guaranteeing to process, to reduce waste product, reduce production costs.

Present brush-less fan is widely used in the sink, see computer such as the most normal now, can produce heat at the internals that starts aft engine, need install a radiation fan additional, reducing temperature works in normal temperature to guarantee computer, reduce rate of fault, therefore brush-less fan plays a part very important, but traditional brush-less fan, be in the bearing support of fan frame, bearing support to be set, the structure of its bearing support, ball-bearing housing as shown in Figure 5 and self-lubricating bearing seat shown in Figure 6, be formed centrally a circular hole 71 in the bearing support 70 among Fig. 5, circular hole 71 is a penetration hole, highly locate to form the less bulge loop of internal diameter 72 making an appointment with half, bulge loop 72 is also divided into the inner space of circular hole 71, following space, for placing bearing, as shown in Figure 6, the basic structure of its bearing support is identical with Fig. 5, but the then necessary close-fitting of self-lubricating bearing is in bulge loop 73, so for long, its relevant position also can not be identical, so bearing support 70 need have two kinds of patterns than bulge loop 72 for the length of bulge loop 73, wherein a kind of pattern as shown in Figure 5, be that ball bearing is set, the length of bulge loop 72 is shorter, in order to cut apart two bearings; Another kind of pattern as shown in Figure 6, is that the length of bulge loop 73 is longer, same close-fitting self-lubricating bearing.

But because of the bearing support 70 of above-mentioned two kinds of patterns is made in the mode of ejection formation by plastics, it no matter is making precision because of mould, or mould is after long-term the use, or personal factor (excessive) as penetrating pressure, cause the shaping die abrasion, and make movable mold and fixed die when mold closing, produce skew, and make the circular hole 71 of the bearing support 70 after the moulding produce stepped at minute mould place, cause circular hole 71 on, following space off-centre, bearing is installed in the space, two place up and down of circular hole 71, and make the endoporus of two bearings produce deviation, so the fan axle is installed in the endoporus of bearing, can produce serious friction with the brearing bore wall, or because of the abrasion of mould make the fan axle produce too tight or too loose cooperating with bearing, and the life-span of causing finished product inferior or reducing fan.

Be formed in one because of bearing support 70 and fan frame again, the circular hole 71 of bearing support is about the external diameter of bearing at the internal diameter of opening, when the assembling bearing, be to belong to closely cooperating, need bearing be forced with external force and be pressed in the circular hole 71, bearing firmly is fixed in the circular hole 71, do not rotate, therefore in manufacture process, each bearing support 70 all needs to have the high circular hole of a dimensional accuracy 71, just can form with bearing to cooperate closely, but because of fan frame and bearing support 70 are formed in one, in case when therefore the size of circular hole 71 produced error, whole fan frame just can't use, so cost of production improves relatively, the group mode of silicon steel plate is to belong to closely cooperating in addition, with its packing, therefore the silicon steel plate that is forced into can be suppressed bearing, and influences the use of bearing with external force.

Main purpose of the present invention is to provide a kind of part processing precision less demanding brush DC fan, its be between the bearing support of fan frame and bearing, add a rubber-like bearing housing and since bearing housing separate making with framework, so framework needn't the high-precision requirement of tool, reduce the generation of framework reject ratio and reduce production costs, its bearing housing is arranged on the bearing support inner side surface, the appropriate location of bearing support inner side surface is provided with several voussoirs, the corresponding voussoir of bearing housing position extends upward several straight troughs in the bottom, and the top of bearing housing forms outward extending bead, one packing ring with breach is set between bead and bearing support top, bearing housing utilizes the blocking of bearing support voussoir, make bearing housing in bearing support, not produce rotation, after assembling, the bearing support of framework, bearing housing and bearing produce the effect of mutual containing, make two bearings symmetry and concentric mutually.

The brush DC fan that provides a kind of bearing support to separate with bearing housing is provided two of purpose of the present invention, voussoir wherein is divided into upper and lower space with the inside of bearing housing, mix use for installing self-lubricating bearing, ball bearing or both, the axle with fan frame is installed in the bearing again.

The brush DC fan that provides a kind of passing rate of processing high is provided three of purpose of the present invention, because bearing support separates manufacturing with bearing housing, and compound mode is simple and easy between the two, and substandard products can be stopped the additional waste that causes because of recovery absolutely according to original quality recovery.

The brush DC fan that provides a kind of cost low is provided four of purpose of the present invention, it also is applicable to self-lubricating bearing, therefore can improve the application function of self-lubricating bearing, because the cost of self-lubricating bearing is low than ball bearing, so the present invention can make that the application of self-lubricating bearing is more extensive, and more cheap manufacture cost is provided.

For achieving the above object, the present invention takes following technological scheme:

Brush DC fan of the present invention comprises fan frame, in the center of fan frame one bearing support is set, and the bearing of air feed fan axle installing is set in the bearing support, and the sheathed silicon steel plate in the bearing support outside is characterized in that:

Described bearing support inner side surface forms several voussoirs, at inner side surface installing bearing housing, be formed centrally the circular hole of always wearing in the bearing housing, the corresponding voussoir of bearing housing position extends upward several straight troughs by the bottom, the top of the bearing housing bead that stretches out, voussoir will be divided in the bearing housing can be for the upper and lower space of installing bearing.

Described brush DC fan, its feature also is: described bearing housing forms the upper and lower space that can install self-lubricating bearing.

Described brush DC fan, its feature also is: the last space of described bearing housing is provided with ball bearing, is equiped with packing ring and ball bearing in the following space.

Described brush DC fan, its feature also is: the space is provided with ball bearing on described bearing housing, and following space is provided with self-lubricating bearing.

Described brush DC fan, its feature also is: the space is provided with self-lubricating bearing on described bearing housing, and following space is provided with packing ring and ball bearing.

Described brush DC fan, its feature also is: the outer periphery of described bearing support is equipped with the raised line of silicon steel plate location, one packing ring is set above silicon steel plate, between described bearing housing bead and silicon steel plate, utilizes the bead restriction silicon steel plate of bearing housing to move up and down.

The present invention and traditional fan frame comparison have following effect:

1. reduce production costs, its bearing housing separates moulding with bearing support, can guarantee the accuracy to size of bearing support, the rate of reducing the number of rejects and seconds, even and produce the bearing housing that there is error in the circular hole aperture, only need give up bearing housing, fan frame with bearing support still can use, and reduces production costs.

2. moulding easily and the stability of mould high, because of the inner side surface of bearing support is provided with a bearing housing, the independent moulding of bearing housing, interior circular hole is by an axle center moulding of mould, can guarantee the concentricity of circular hole, paring line is not arranged on the circular hole place of bearing housing, and does precision machining because of its volume I, make the interior sidewall surface of bearing housing form striped, increase blocking ability with bearing.

3. only need a kind of bearing support and bearing housing of pattern, can assemble self-lubricating bearing or ball bearing, when assembling self-lubricating bearing or ball bearing, only need the space up and down that self-lubricating bearing or ball bearing are packed in the bearing housing is got final product, also self-lubricating bearing and ball bearing can be used.

4. to be the outside that is set in bearing support do not produce rotation by raised line is fixing to silicon steel plate, and utilize the bead restriction silicon steel plate of bearing housing to move up and down, silicon steel plate is positioned at the outside of bearing support, and its silicon steel plate and bearing support are that the mode that adopts pine to join makes up, and make assembling more convenient.

Further specify specific structural features of the present invention and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings:

Fig. 1 is that fan frame of the present invention is provided with schematic representation.

Fig. 2 is an element decomposing schematic representation of the present invention.

Fig. 3 is the floor map that the present invention installs self-lubricating bearing.

Fig. 4 is the floor map that the present invention installs ball bearing.

Fig. 5 is the floor map of the bearing support of conventional fan framework.

Fig. 6 is the floor map of the bearing support of another conventional fan framework.

As shown in Figure 1, it is that fan frame of the present invention is provided with schematic representation, find out that by knowing among the figure the present invention is installed in the bearing support 20 at framework 10 centers, its element decomposing schematic representation, as shown in Figure 2, bearing support 20 peripheral formation stage shapes, and the superiors in the periphery are provided with several raised lines 21, the appropriate location of bearing support 20 inner side surfaces is provided with several voussoirs that protrudes to the inside 22, forms a fastening part 23 at the inner side surface of bearing support 20 Lower Halves.

The inner side surface of fitted shaft bearing 20 is provided with a bearing housing 40, the central position of bearing housing 40 is provided with a circular hole that runs through 43, bearing housing 40 is upwards formed the straight trough 42 of several corresponding voussoirs 22 by the bottom, and form an outward extending bead 41 in bearing housing 40 tops, bead 41 from top to bottom forms several short slots 411, utilize the setting of straight trough 42 and short slot 411 to make bearing housing 40 have elasticity, the bottom of bearing housing 40 is provided with several outward extending hook portions 44.

The upright program of group, be earlier circuit board 60 to be set in bearing support 20 outsides, on the circuit board 60 circuit can be set, it shown in the figure circuit board plate body that circuit is not set as yet, again the support body 31 of silicon steel plate 30 is set in the periphery of bearing support 20, then the raised line 21 of bearing support 20 peripheries can be positioned at silicon steel plate 30 on the framework 10, can not rotate, place packing ring 32 again on support body 31, refill and establish bearing housing 40 in bearing support 20, the bead 41 restriction silicon steel plates 30 of bearing housing 40 move up and down, with silicon steel plate 30 and support body 31 location.

Please cooperate referring to Fig. 2 and shown in Figure 3, it is the floor map that the present invention installs ball bearing, by knowing the situation of finding out that the present invention assembles among the figure, bearing housing 40 is arranged on bearing support 20 inboards, straight trough 42 corresponding voussoirs 22 are provided with, packing ring 32 is between the bead 41 and half a step steel disc 30 tops of bearing housing 40, bearing housing 40 is fixed on bearing support 20 inboards, do not produce rotation, and voussoir 22 also protrudes in bearing housing 40 inboards bearing housing 40 inside is divided into, following two spaces, last, two ball bearings 50 are set respectively in the following space, ball bearing 50 is arranged in the bearing housing 40, rubber-like bearing housing 40 can be strutted a little, make bearing housing 40 more tight, and several hook portions 44 on 40 ends of bearing housing tops, be held in the fastening part 23 of bearing support 20 with cooperating of bearing support 20, afterwards the axle 531 of fan blade 53 is passed a spring 52 earlier, packing ring 54 passes a ball bearing 50 and a packing ring 55 again, then pulls fixing with clasp 56 folders.

As shown in Figure 4, it installs the floor map of self-lubricating bearing for the present invention, as above-mentioned bearing housing 40 is installed in the bearing support 20, upper and lower space will be divided into by voussoir 22 in the bearing housing 40, self-lubricating bearing 51 is set in upper and lower space, and the top of self-lubricating bearing 51 is provided with an oil ring 57 up, make between two self-lubricating bearings 51, form a grease chamber 58, self-lubricating bearing 51 is set also can a little outwards strut bearing housing 40, make bearing housing 40 more tight, and several hook portions 44 on 40 ends of bearing housing tops, be held in the fastening part 23 of bearing support 20 with cooperating of bearing support 20.

Wherein self-lubricating bearing 51 also can be used with ball bearing 50, and self-lubricating bearing 51 or ball bearing 50 are installed in the bearing housing 40, makes it to become another combination of the design.

Claims

1, a kind of brush DC fan comprises fan frame, in the center of fan frame one bearing support is set, and the bearing of air feed fan axle installing is set in the bearing support, and the sheathed silicon steel plate in the bearing support outside is characterized in that:

2, brush DC fan according to claim 1 is characterized in that: described bearing housing forms the upper and lower space that can install self-lubricating bearing.

3, brush DC fan according to claim 1 is characterized in that: the last space of described bearing housing is provided with ball bearing, is equiped with packing ring and ball bearing in the following space.

4, brush DC fan according to claim 1, it is characterized in that: the space is provided with ball bearing on described bearing housing, and following space is provided with self-lubricating bearing.

5, brush DC fan according to claim 1, it is characterized in that: the space is provided with self-lubricating bearing on described bearing housing, and following space is provided with packing ring and ball bearing.

6, brush DC fan according to claim 1, it is characterized in that: the outer periphery of described bearing support is equipped with the raised line of silicon steel plate location, one packing ring is set above silicon steel plate, between described bearing housing bead and silicon steel plate, utilizes the bead restriction silicon steel plate of bearing housing to move up and down.