CN2697364Y

CN2697364Y - Miniature fan with improved lower jaw polar fixing structure

Info

Publication number: CN2697364Y
Application number: CN 200420022211
Authority: CN
Inventors: 叶伟尧
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-24
Filing date: 2004-04-24
Publication date: 2005-05-04
Anticipated expiration: 2014-04-24

Abstract

The utility model relates to a miniature fan in order to improve the fixing mode of the existing fan lower claw pole. A miniature fan with improved lower claw pole fixing structure comprises upper and lower casings, a motor arranged inside and a color circle between the upper and lower casings. The stator of the motor comprises upper and lower claw poles, coils arranged inside and a shaft, the upper end of the stator is connected with a connecting shaft by a combined shaft, the lower end of the stator is positioned on the lower casing by a positioning shaft, the rotor of the motor comprises a shell, blades and a permanent magnet fixed on the color circle, and the lower claw pole is fixed on the combined shaft by the positioning shaft. The utility model has the advantages that the mode that the original lower claw pole is fixed by a plurality of screws is changed into the mode that the fixing shaft is directly connected on the combined shaft by a thread, the assembly of the fan is more convenient, the assembly cost is saved, and the production cost of the fan is greatly saved. In addition, the threaded connection can ensure the concentricity of the products so as to improve the quality of the products.

Description

Improve the micro fan of lower claw utmost point fixed structure

Technical field

The utility model relates to a kind of micro fan, particularly a kind of micro fan that improves lower claw utmost point fixed structure.

Background technique

Micro fan is simple in structure because of it, air quantity is moderate, volume is little, little power consumption and obtained widely using, there is a kind of structure to be at present: to comprise, lower shell body and built-in motor thereof and the chromosphere between last lower shell body, the stator of motor is by the last lower claw utmost point, coil that is placed in one and axle are formed, the stator upper end is connected with coupling shaft by its axle, the lower end is positioned on the lower shell body by its axle, the rotor of motor is by shell, blade and permanent magnet are formed, described permanent magnet is fixed on the chromosphere, the lower claw utmost point is screwed on built-up shaft by the hole on it, and positioning shaft is fixed on the inside of built-up shaft and passes the built-up shaft axle center.There is following shortcoming in this structure: owing to the lower claw utmost point need be screwed on built-up shaft, so complex structure, assembling difficulty and concentricity are poor.

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 a kind of micro fan that improves pawl utmost point fixed structure is provided, and makes that its making is easier, cost is lower, concentricity is better.

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

Improve the micro fan of lower claw utmost point fixed structure, comprise upper and lower casing and built-in motor thereof and the chromosphere between last lower shell body, the stator of motor is made up of the last lower claw utmost point, the coil that is placed in one and axle, the stator upper end is connected with coupling shaft by built-up shaft, the lower end is positioned on the lower shell body by positioning shaft, the rotor of motor is made up of shell, blade and permanent magnet, and described permanent magnet is fixed on the chromosphere, and the described lower claw utmost point is fixed on the built-up shaft by positioning shaft.

Above-mentioned positioning shaft upper end is a screw thread, with the screw-thread fit of built-up shaft, and can lower claw is extremely convenient fixing.

Compared with prior art, advantage of the present utility model is that original lower claw utmost point is changed into stationary axle by the mode of several screw directly to be connected on the built-up shaft by screw thread, convenient when assembling electric fan like this, thus assembly cost saved, therefore can save the cost of production of fan greatly.In addition,, can guarantee the concentricity of product, thereby improve the quality of product by being threaded.

Description of drawings

Fig. 1 is the utility model embodiment's a structural representation.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing embodiment.

As shown in Figure 1, the micro fan of improvement lower claw utmost point fixed structure comprises starting box 1, suspension rod 2, goes up lower shell body 12 and coupled blade 17; Upper shell and lower shell body are fixing by screw 9, and the joint also is embedded with chromosphere 10; Suspension rod 2 bottoms are connected with armature built-up shaft 4 by screw 3; 4 times overcoat windings 5 of armature built-up shaft, the dewclaw utmost point 7, the lower claw utmost point 11 on the upper and lower sleeve, constitute motor stator, the lower claw utmost point 11 is fixed on the axle cap 15 of built-up shaft 4 by threaded positioning shaft 6, and fastening by nut 18, connect plastic spacer 13 down and wear down, positioning shaft passes for 6 times in the axle sleeve of lower shell body center, the lower end is fixing by plastic spacer 23, split washer 21, and whole like this motor stator can be positioned on the central position; To permanent magnet 8 should be arranged, it is bonded on the magnet ring circle 16 and is fixed on the chromosphere 10 outside stator, constitutes rotor, lower shell body 12 center dress trims 22, and blade 17 heads have projection 24, are buckled in the groove 25 of chromosphere 10.The little guard shield 14 of built-up shaft 4 top outer covers.

There are upper bearing (metal) 19, lower bearing 20 in the part outside of positioning shaft 6 in axle sleeve, so more can be wear-resisting.

Claims

1, improves the micro fan of lower claw utmost point fixed structure, comprise upper and lower casing and built-in motor thereof and the chromosphere between last lower shell body, the stator of motor is made up of the last lower claw utmost point, the coil that is placed in one and axle, the stator upper end is connected with coupling shaft by built-up shaft, the lower end is positioned on the lower shell body by positioning shaft, the rotor of motor is made up of shell, blade and permanent magnet, and described permanent magnet is fixed on the chromosphere, it is characterized in that: the described lower claw utmost point is fixed on the built-up shaft by positioning shaft.

2, the micro fan of improvement lower claw utmost point fixed structure as claimed in claim 1, it is characterized in that: described positioning shaft is threaded with the axle cap of built-up shaft.

3, the micro fan of improvement lower claw utmost point fixed structure as claimed in claim 2, it is characterized in that: described positioning shaft lower end is fixed by nut.

4, as the micro fan of claim 2 or 3 described improvement lower claw utmost point fixed structures, it is characterized in that: the part of described positioning shaft in axle sleeve is with bearing.

5, the micro fan of improvement lower claw utmost point fixed structure as claimed in claim 4, it is characterized in that: described bearing is divided into upper and lower two parts.