CN2649821Y

CN2649821Y - Miniature fan with improved positioning axle structure

Info

Publication number: CN2649821Y
Application number: CN 03209734
Authority: CN
Inventors: 陈士清
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-11
Filing date: 2003-08-11
Publication date: 2004-10-20
Anticipated expiration: 2013-08-11

Abstract

The utility model relates to a minisize fan which is designed for the purpose of improving the defect of the positioning axis of the minisize fan. The minisize fan which has an improved positioning axis includes an upper, a lower shell body, and a motor which is arranged in the fan and has a positioning axis. A rotor of the motor consists of a shell, a leaf which is fixed on the shell, and a permanent magnetic body; a stator consists of an upper and a lower claw pole, and an iron core, a coil, and a composite axle which are arranged in the stator; the upper part of the stator is connected with a hoist rod through the composite axle, and the lower part of the stator is fixed at the lower claw pole; the positioning axle is fixed on the composite axle; an axle sleeve is provided in the correspondent lower shell body; the positioning axle is fixed on the lower shell body through the axle sleeve. The utility model has the advantages that the positioning axle is fixed on the composite axle, which facilitates injection and increases the concentricity and the perpendicularity, and thus the fan is easy to assemble, at the same time reducing the debugging program, improving the product quality, and reducing waste products with reduction of production costs.

Description

Improve the micro fan of positioning shaft structure

Technical field

The utility model relates to a kind of micro fan, particularly a kind of micro fan that changes motor positioning shaft structure.

Background technique

Micro fan is simple in structure because of it, air quantity is moderate, volume is little, little power consumption has obtained using widely, and its typical structure is seen Fig. 1, and it comprises suspension rod 1, upper shell 3, lower shell body 18 and coupled fan blade 20; Also have ring 24 on the upper shell 3, also be embedded with the chromosphere 4 of decorating action with lower shell body 18 joints; Suspension ring 22 upper ends have and are used to connect and the fixing suspension ring 21 of micro fan, fixing with suspension rod 1 by fixing frame 23 down by screw 24,22 on suspension rod 1 top and suspension ring are fixing torsion spring 25 also, and suspension rod 1 lower end is connected with it by the hole 27 usefulness screws on the armature built-up shaft 15; 15 times outside cover upper cores 16 of armature built-up shaft and coil 9, the dewclaw utmost point 5 lower claw utmost points 17 on the upper and lower sleeve, constitute motor stator, the lower claw utmost point 17 is fixed on the built-up shaft 15 with screw 10 by the hole on it, positioning shaft 19 passes built-up shaft 15 center fixed in the positive further groove of lower shell body 18, the upper end is fixing by back-up ring 12, and whole like this motor stator can be positioned on the central position; The outer correspondence of lower shell body 18 inherent stators is fixed with permanent magnet 7, and is fixed on the lower shell body 18 by metal ferrules 8, constitutes rotor.

Though this structure is used built-up shaft; simplified the structure of original mini fan; but also there is following shortcoming: because positioning shaft is arranged on the lower shell body by injection moulding; add and be injection-moulded on the lower shell body after putting heat resistant plastice earlier man-hour; perpendicularity usually can take place and concentricity departs from positioning shaft after the injection moulding, needs manually to adjust, and what have will scrap; therefore the product percent of pass of electric fan is low, and cost increases.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the above-mentioned shortcoming that present micro fan exists and more reasonably micro fan of a kind of positioning shaft means of fixation is provided, and makes that its processing is more convenient, better quality, cost be lower.

The utility model solves the problems of the technologies described above the technological scheme that is adopted:

Improve the micro fan of positioning shaft structure, the motor that comprises upper and lower casing and built-in band positioning shaft thereof, the rotor of motor is made up of shell and blade, the permanent magnet fixed on it, stator is made up of the last lower claw utmost point, the iron core that is placed in one, coil and built-up shaft, the stator upper end is connected with suspension rod by its built-up shaft, and its underpart and lower claw are extremely fixing, and described positioning shaft is fixed on the built-up shaft, in the corresponding lower shell body axle sleeve is arranged, positioning shaft passes axle sleeve and is fixed on the lower shell body.

Main improvement of the present utility model is positioning shaft, and original positioning shaft is fixed on the center of lower shell body and has changed on the built-up shaft, is convenient to processing and location.

Compared with prior art, advantage of the present utility model is positioning shaft is fixed on the built-up shaft, makes things convenient for injection moulding, improve its concentricity and perpendicularity, therefore can make things convenient for the fan assembling, reduce debugging routine, improve the quality of products, reduce waste product, thereby reduce production costs.

Description of drawings

Fig. 1 is the structural representation of existing fan;

Fig. 2 is the utility model embodiment's a structural representation.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 2, the micro fan of improvement positioning shaft structure comprises suspension rod 1, little guard shield 2, upper shell 3, lower shell body 18 and coupled fan blade 20; Upper shell 3 and lower shell body 18 joints also have been embedded with the chromosphere 4 of decorating action; Suspension rod 1 time is connected with armature built-up shaft 15 by screw 14; 15 times overcoat upper cores of armature built-up shaft, 16 windings 9, the dewclaw utmost point 5, the lower claw utmost point 17 on the upper and lower sleeve, constitute motor stator, the lower claw utmost point 17 is fixed on the built-up shaft 15 with screw 10 by the hole on it, the positioning shaft 19 of head band metallic sheath is fixed on the inside of built-up shaft 15 and passes built-up shaft 15 axle center, pass down in the axle sleeve of center of lower shell body 18, the lower end is fixing by back-up ring 12, and whole like this motor stator can be positioned on the central position; The outer correspondence of lower shell body 18 inherent stators is fixed with permanent magnet 7, and is fixed on the lower shell body 18 by iron lasso 8, constitutes rotor, lower shell body 18 center dress trims 13.

Lower shell body 18 axle sleeve internal fixation nylon bearings 11.

The electric principle of electric fan is very common, no longer explanation.

Claims

1, improves the micro fan of positioning shaft structure, the motor that comprises upper and lower casing and built-in band positioning shaft thereof, the rotor of motor is made up of shell and blade, the permanent magnet fixed on it, stator is made up of the last lower claw utmost point, the iron core that is placed in one, coil and built-up shaft, the stator upper end is connected with suspension rod by its built-up shaft, and its underpart and lower claw are extremely fixing, it is characterized in that: described positioning shaft is fixed on the built-up shaft, in the corresponding lower shell body axle sleeve is arranged, positioning shaft passes axle sleeve and is fixed on the lower shell body.

2, the micro fan of improvement positioning shaft structure as claimed in claim 1 is characterized in that: described positioning shaft top is fixed on the built-up shaft by metallic sheath.

3, the micro fan of improvement positioning shaft structure as claimed in claim 1 or 2 is characterized in that: described lower shell body axle sleeve inner fixed bearing.