CN1056020C

CN1056020C - Miniature brush-less fan

Info

Publication number: CN1056020C
Application number: CN95117602A
Authority: CN
Inventors: 谢新茂
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-10-10
Filing date: 1995-10-10
Publication date: 2000-08-30
Anticipated expiration: 2015-10-10
Also published as: CN1147602A

Abstract

The present invention relates to a miniature brushless fan. a bearing sleeve is arranged in a bearing seat of a fan frame. The bearing sleeve is a hollow cylinder, the inner part is a through hole, and the outer side is a ring groove. The ring groove is provided with symmetrical notches at a proper position. A sleeve ring is arranged at the position of the ring groove and has a C-shaped wall surface. The bottom edge of the wall surface forms a plate which inwards extends from the notches so that the inner part of the bearing sleeve is divided into an upper space and a lower space for arranging a ball bearing or a self-lubricating bearing. An induction seat is arranged on the outer side of the bearing sleeve. The upper end and the lower end of a frame body of the induction seat form an upper and a lower fixed posts which are matched with fixed holes of an upper stator and a lower stator so that the upper and the lower fixed posts are positioned. Then a blade mandrel is loaded in a bearing inner bore and is fixed by a cushion ring and a retaining ring so as to become a novel structure of a fan, which is suitable for loading two bearings.

Description

Miniature brush-less fan

The present invention relates to a kind of miniature brush-less fan, particularly a kind of fan new construction of installing two kinds of pattern bearings.

Brush-less fan is arranged in the machine as heat transmission, with the hot gas discharge machine exterior that machine intimate generated more.General common miniature brush-less fan structure is divided into two kinds of patterns, and is a kind of for the structure of ball bearing is set, another kind of for the structure of self-lubricating bearing is set.Ball bearing wherein is set, as shown in Figure 4, it is that a bearing holder (housing, cover) 71 is set in bearing pedestal 70, the appropriate location of bearing holder (housing, cover) 71 inside forms the flange 72 that extends to the inside, flange 72 is divided into two spaces up and down with the inside of bearing holder (housing, cover) 71, in the space ball bearing 73 can be set up and down, but bearing holder (housing, cover) 71 during fabrication, be to hole from two ends respectively, and the boring at two ends does not connect formation flange 72, flange 72 is divided into two spaces up and down with inner area, but bearing holder (housing, cover) 71 is to hole respectively from two ends, and therefore the hole of being bored can't generate deviation with one heart, two ball bearings 73 are arranged at respectively up and down in the space, then also decentraction of the endoporus of two ball bearings 73, so the axle of flabellum is difficult for being assembled in the bearing, and in case by force axle is forced into bearing inside with external force, because the off-centre setting of bearing, under the situation that fan turns round continuously, easily cause the crooked damage of axle, this kind fan structure discloses in second figure of the novel patent application No.79213967 in the Taiwan that is entitled as " DC Brushless Motor " to some extent.

The structure of self-lubricating bearing is set, as shown in Figure 5, it is that a bearing holder (housing, cover) 81 is set in bearing pedestal 80, bearing holder (housing, cover) 81 inside have through hole, and the inboard does not have the flange of setting for shiny surface, therefore bearing holder (housing, cover) 81 can be for self-lubricating bearing 82 is set, the internal diameter of right bearing holder (housing, cover) 81 needs to match with the external diameter of self-lubricating bearing 82, formation closely cooperates, but it is very high that the precision size degree of this kind bearing holder (housing, cover) 81 requires, the internal orifice dimension that has error promptly to make self-lubricating bearing 82 slightly diminishes, and the poor fit of formation self-lubricating bearing 82 and axle 83, therefore need higher cost on making, non-is the design of a practicality, and the fan structure that this kind has self-lubricating bearing discloses in the novel patent application No.81217778 in Taiwan that is entitled as " the oil ring improvement of cooling fan bearing " to some extent.

Because the structure of existing self-lubricating bearing is very difficult on making, therefore still to make the structure of ball bearing, it is doubly a lot of that but the single cost of ball bearing exceeds than self-lubricating bearing, therefore manufacturing is comparatively convenient does not still stint with the ball bearing manufacturing existing fan structure in order to make, but also therefore improve the production cost of manufacturer, simultaneously also have no way of solving aforesaid concentric problem, and existing fan structure, different bearing holder (housing, cover)s need be set for self-lubricating bearing or ball bearing are set, increase the kind of member and the complexity of structure on the contrary, non-is a good design.

Main purpose of the present invention is, provides a kind of applicable to the ball bearing or the miniature brush-less fan new construction of the installing of self-lubricating bearing.

Another object of the present invention is to, a kind of miniature brush-less fan new construction of saving built-up time is provided.

A kind of miniature brush-less fan provided by the invention, it is by a bearing holder (housing, cover) is set in the bearing pedestal, in the bearing holder (housing, cover) bearing can be set, and in the outside of bearing holder (housing, cover) a sheathed sense base, the top and the bottom of sense base are provided with respectively, following stator piece, following stator piece below is provided with a circuit board, the axle of the endoporus air feed fan of its middle (center) bearing wears, its characteristics are: the inside of bearing holder (housing, cover) is through hole, and the appropriate location in the bearing holder (housing, cover) outside is provided with an annular groove, annular groove forms the breach of symmetry in appropriate location, the annular groove outside can be for a collar is set, the collar has c-shaped wall, and forming plate in the root edge of wall, plate stretches into the inboard of bearing holder (housing, cover) from indentation, there, and the inner area of bearing holder (housing, cover) is divided into two spaces up and down, and in sense base support body top and the bottom upwards downwards extend fixed leg respectively, on, the appropriate location of following stator piece forms the fixing hole that cooperates with fixed leg.

Aforesaid miniature brush-less fan new construction, the top and the bottom of its centre bearer bush outer ring groove form two flanges, and flange can be located the upper-lower position of upper and lower stator piece.

The invention has the advantages that: the design of bearing holder (housing, cover) is to form a through hole in inside, the bearing holder (housing, cover) outside forms an annular groove, the annular groove appropriate location forms breach, and in the sheathed collar in the annular groove outside, the plate of the collar is divided into two spaces up and down with bearing holder (housing, cover), wherein in the space ball bearing or self-lubricating bearing can be set up and down, can determine it according to producer's demand, can select the self-lubricating bearing assembling for use, save cost, therefore structure Design variability of the present invention is big, is the design of a practicality.

Further specify architectural feature of the present invention and purpose below in conjunction with accompanying drawing.

Fig. 1 is an element decomposing schematic representation of the present invention.

Fig. 2 installs the combination schematic diagram of ball bearing for the present invention.

Fig. 3 installs the combination schematic diagram of self-lubricating bearing for the present invention.

Fig. 4 is provided with the combination schematic diagram of ball bearing for existing structure.

Fig. 5 is provided with the combination schematic diagram of self-lubricating bearing for existing structure.

Please referring to shown in Figure 1, it is an element decomposing schematic representation of the present invention, the appropriate location of fan frame 10 in the bottom extends upward a bearing pedestal 11, and bearing pedestal 11 is the torus of a hollow, and other is provided with a bearing holder (housing, cover) 20, bearing holder (housing, cover) 20 is a hollow cylindrical, bearing holder (housing, cover) 20 is provided with an annular groove 22 in outside appropriate location, and forms corresponding breach 221 in annular groove 22 both sides, and forms

flange

21,23 respectively in the top and the below of annular groove 22, other is provided with a collar 30, and the collar 30 is slightly c-shaped ring wall surface 31.The root edge of wall 31 is symmetrical arranged two circular arc plates 32;

Other is provided with sense base 40 and reaches, following

stator piece

50,51, sense base 40 has support body 41, the top of support body 41 and bottom form respectively upwards and the fixed leg 42 that extends downwards, and annular groove is provided with induction coil 43 in the outside of support body 41, on, following

stator piece

50,51 is the ring-type plate body, the position of the corresponding fixed leg 42 of plate body forms fixing hole 501,511, and the appropriate location in outer rim is extended catch 502 downward or upward, 512, on, following stator piece 50, after 51 assemblings, be positioned flange 21 respectively, 23 places, make stator piece 50 be positioned at the top of flange 21, following stator piece 52 is positioned at flange 23 belows, as shown in Figure 2.

During assembling, please cooperate referring to Fig. 1, shown in Figure 2, one bearing holder (housing, cover) 20 is set in the bearing pedestal 11 of framework 10, the collar 31 is embedded in annular groove 22 places of bearing holder (housing, cover) 20, and circular arc plate 32 clips form positioning states in the breach 221 of annular groove 22, plate 32 is divided into from the inner space that breach 221 extends internally bearing holder (housing, cover) 20, following two spaces, please cooperate referring to shown in Figure 2, on, can be in the following space for bearing 63 is set, bearing 63 can be ball bearing or self-lubricating bearing, again circuit board 64 is arranged at bearing holder (housing, cover) 20 outsides, be positioned at bearing pedestal 11 tops, stator piece 51 is set down again in bearing holder (housing, cover) 20 outsides in regular turn, make down stator piece 51 be positioned at circuit board 64 tops, annular groove 22 outsides of sense base 40 in bearing holder (housing, cover) 20 are set again, make the fixed leg 41 of sense base 40 be fixed in the fixing hole 511 interior positioning states that form of stator piece 51 down, and the catch 512 of following stator piece 51 is positioned at the coil outside, stator piece 50 is set again in sense base 40 tops, and fixing hole 501 corresponding fixed legs 42 settings that will go up stator piece 50, make above-mentioned each member form positioning states.

Please cooperate again referring to shown in Figure 2, again two bearings 63 is arranged in the space up and down of bearing pedestal 11 respectively, and hold 63 tops in last spatial axes one packing ring and spring 62 are set, axle 61 with flabellum 60 is arranged in the endoporus of two bearings 63 up and down respectively again, and in the root edge of axle 61 that bearing 63 is fixing in bearing 63 belows installing packing ring and retaining ring cyclization;

The situation that self-lubricating bearing is set as shown in Figure 3, different the be self-lubricating bearings unique with ball bearing need be provided with oil ring, and other members are all identical with ball bearing, do not repeat them here, and a self-lubricating bearing and a ball bearing can be set in the space up and down of a bearing holder (housing, cover) 20, ball bearing and self-lubricating bearing are used.

Fan of the present invention is designed at ball bearing and self-lubricating bearing, therefore the endoporus of bearing holder (housing, cover) 20 of the present invention is the setting of through hole, its manufacture is easy, and be provided with annular groove 22 places the collar 30 can be set, the circular arc plate 32 of the collar 30 extends to the inside from the breach 221 of bearing holder (housing, cover) 22, the inside of bearing holder (housing, cover) 20 is divided into two spaces up and down, can be for self-lubricating bearing or ball bearing are set, because it is last, following self-lubricating bearing is fixed by the plate 32 of the collar 30, so can avoid that existing structure is required to closely cooperate, and top and bottom in sense base 40 form fixed leg 42 respectively, fixed leg 42 is with last, following

stator piece

50,51 fixing hole 501,511 cooperate, form positioning states, exempt from special smelting tool.

Claims

1. miniature brush-less fan, it is by a bearing holder (housing, cover) is set in the bearing pedestal, in the bearing holder (housing, cover) bearing can be set, and in the outside of bearing holder (housing, cover) a sheathed sense base, the top of sense base and bottom are provided with upper and lower stator piece respectively, following stator piece below is provided with a circuit board, and the axle of the endoporus air feed fan of its middle (center) bearing wears, and it is characterized in that:

The inside of bearing holder (housing, cover) is through hole, and the appropriate location in the bearing holder (housing, cover) outside is provided with an annular groove, annular groove forms the breach of symmetry in appropriate location, the annular groove outside can be for a collar is set, the collar has c-shaped wall, and forms plate in the root edge of wall, and plate stretches into the inboard of bearing holder (housing, cover) from indentation, there, the inner area of bearing holder (housing, cover) is divided into two spaces up and down

And in sense base support body top and the bottom upwards downwards extend fixed leg respectively, the appropriate location of upper and lower stator piece forms the fixing hole that cooperates with fixed leg.

2. miniature brush-less fan according to claim 1 is characterized in that: the top and the bottom of bearing holder (housing, cover) outside annular groove form two flanges, and flange can be located the upper and lower position of upper and lower stator piece.