TWM654241U - Fan stator fixing structure - Google Patents

Abstract

A fan stator fixing structure includes a fan frame, a shaft tube, and a stator assembly. A curing portion is vertically extended from one side of the fan frame, and the curing portion is located between the shaft tube and the stator assembly. The curing portion is heated to be reshaped after being heated, and the shaft tube and the stator assembly are directly fixed to the fan frame at the same time, thereby improving the shortcomings of the traditional glue dispensing method, such as complicated construction, long manufacturing time and high defect rate.

Description

Fan stator fixing structure

This invention relates to the field of fans, in particular to a fan stator fixing structure.

Please refer to Figures 1A, 1B, and 1C, which are the stator fixing structures of the current fan. The fan frame 91 of the fan 9 has a base 92, and a joint portion is provided on the base 92 to insert a metal sleeve 94 (middle sleeve), and a stator assembly 93 is sleeved on the outside of the metal sleeve 94 and matched with a blade rotor to form a complete fan 9. It is known that in order to stably set the stator assembly 93 on the metal sleeve 94, a glue-pointing method is adopted, firstly applying the fixing glue on the outside of the metal sleeve 94, and then sleeve the stator assembly 93 on the outside of the metal sleeve 94, and wait for the fixing glue to dry and solidify, so that the stator assembly 93 is bonded to the outside of the metal sleeve 94. If the amount of glue is not properly controlled, glue overflow may occur, and the components other than the metal sleeve 94 may be stuck by the overflowed glue residue, or the glue residue may adhere to the outer surface of the stator assembly 93, which will affect the heat dissipation of the stator assembly 93. The excess glue may also easily lead to uneven weight distribution of the fan, which may cause the fan to shake or vibrate during operation. Furthermore, the glue between the metal sleeve 94 and the stator assembly 93 may also easily cause the heat generated inside the metal sleeve 94 to be unable to diffuse outward, thereby forming a thermal resistance between the two, causing the bearing inside the metal sleeve 94 to accumulate heat, forcing the bearing to overheat and cause damage, causing the fan to malfunction. In addition, it is known that after the above-mentioned glue spotting procedure is completed, an external thread 941 will be set on the outside of the top of the metal sleeve 94, so that a screw fixture 96 is screwed with a nut 95 relative to the external thread 941 to strengthen the axial limit of the stator assembly 93 and prevent the stator assembly 93 from falling off the metal sleeve 94. Although the glue spotting and the screw nut 95 locking can ensure that the stator assembly 93 does not fall off axially along the metal sleeve 94, the spotting operation plus the sleeve nut 95 locking operation is quite time-consuming, thereby increasing the manufacturing cost. Therefore, the following deficiencies are derived from the knowledge: 1. It is necessary to add additional gluing process and fixing process, resulting in increased cost; 2. The fixing glue may deteriorate, resulting in poor fixing effect; 3. It is necessary to make a corresponding structure (such as external thread 941) on the shaft tube 92 to match the nut 95, resulting in increased working hours. 4. It is easy to cause overflow glue and thermal resistance problems after gluing. Therefore, how to solve the above problems and deficiencies is the direction that the creator of this case and related manufacturers engaged in this industry are eager to study and improve.

In order to improve the above-mentioned problems, the present invention provides a fixing structure for stably combining a fan stator with a fan frame. Another main purpose of the present invention is to provide a fan stator fixing structure with reduced cost. Another main purpose of the present invention is to provide a fan stator fixing structure with saved process. To achieve the above-mentioned purpose, the present invention provides a fan stator fixing structure, which includes a fan frame, a shaft tube, and a stator assembly. A curing part is vertically extended from one side of the bottom of the fan frame, a shaft tube is inserted into the interior of the curing part, and a stator assembly is sleeved on the outer edge of the curing part, and the curing part is heated so that the curing part is plastically deformed after being heated, and the shaft tube and the stator assembly are stably fixed to the fan frame. With the above structure, the curing part with thermoplastic properties is heated to be shaped, so that the stator assembly sleeved on the outside and the shaft tube plugged into the inside are directly fixed to the fan frame, eliminating the traditional step of fixing the stator assembly to the outside of the shaft tube by glue. This not only shortens the working time, but also eliminates the need for other locking elements to further strengthen the axial limit of the stator assembly and the shaft tube. Therefore, this invention greatly reduces the manufacturing time, improves the manufacturing efficiency, and also improves the various shortcomings derived from glue.

The above-mentioned purpose of this invention and its structural and functional characteristics will be explained according to the preferred embodiment of the attached drawings. Please refer to Figure 2A and Figure 2B, which are cross-sectional schematic diagrams and exploded schematic diagrams of the stator fixing structure of this invention. The fan of this invention mainly includes a fan frame 1, a stator assembly 2 and a rotor assembly 3. One side of the bottom of the fan frame 1 vertically extends to form a cylindrical curing part 11 (middle cylinder). The curing part 11 and the fan frame 1 are integrally or non-integrally molded. This embodiment is implemented by integral molding but is not limited thereto. The inner surface and outer edge of the curing part 11 are respectively formed with a first bonding surface 111 and a second bonding surface 112. The curing part 11 is a thermoplastic material and can be re-molded by heating. A shaft tube 13 has a first end 131 and a second end 132, and the shaft tube 13 is inserted (connected) inside the curing part 11, so it is covered by the curing part 11, and the outer surface of the shaft tube 13 is attached or contacted with the first bonding surface 111 of the curing part 11. A plurality of bearings 14 are arranged inside the shaft tube 13. The shaft tube 13 is made of metal or non-metal material. The length of the shaft tube 13 is greater than the curing part 11, so the second end 132 protrudes from the curing part 11. The shaft tube 13 has at least one step 113 or recessed portion on the outside, and the step is arranged between the first end 131 and the second end 132. The stator assembly 2 includes a silicon steel sheet assembly 21, an insulating frame 22 and a coil (not shown). The insulating frame 22 is combined with the silicon steel sheet assembly 21, and the coil is wound around the silicon steel sheet assembly 21. The stator assembly 2 is sleeved on the second bonding surface 112 of the solidification part 11. This case mainly selects thermoplastic material for the part of the solidification part 11 or the fan frame 1 as a whole, and then heats and molds the solidification part 11, so that the shaft tube 13 that was originally loosely plugged into the inside of the solidification part 11 is tightly covered by the solidification part 11 after the solidification part 11 is thermoplastically deformed, and at the same time covers the step 133, so that the shaft tube 13 is axially limited and fixed relative to the solidification part 11. The stator assembly 2, which was originally loosely sleeved on the outside of the solidification part 11, also closely fits the inner edge of the stator assembly 2 with the second bonding surface 112 of the solidification part 11 after the solidification part 11 is heated and reshaped. In addition, since the inner diameters of the silicon steel sheet assembly 21 and the insulating frame 22 of the stator assembly 2 are different, when the solidification part 11 is heated and reshaped, a shoulder 1121 is formed at the lower end of the second bonding surface 112 relative to the silicon steel sheet assembly 21 near the insulating frame 22, and a stopper 1122 is formed near the upper end of the insulating frame 22, so that the solidification part 11 provides axial stop and fixation for the stator assembly 2. The rotor assembly 3 includes an axis 31, a wheel hub 32 and a plurality of blades 33. The axis 31 is vertically disposed at the center of the wheel hub 32. The blades 33 are disposed on the outer annular wall of the wheel hub 32. The axis 31 is inserted into the shaft tube 13 and connected to the bearings 14. The invention uses a material with thermoplastic properties to shape the solidified portion 11, and heats the solidified portion 11 before it can be reshaped, so that the solidified portion 11 is reshaped to tightly cover the outside of the shaft tube 13 and fill the gap between the shaft tube 13 and the stator assembly 2. When the solidified portion 11 is re-cured and formed, the shaft tube 13 and the stator assembly 2 are fixed together in the fan frame 1, thereby improving the various shortcomings of the traditional fan derived from the glue dispensing process. In summary, the invention has the following advantages: 1. Simple and stable structure; 2. Easy to manufacture; 3. Low cost. The invention has been described in detail above, but the above is only a preferred embodiment of the invention and cannot limit the scope of implementation of the invention. That is, all equal changes and modifications made within the scope of the application for this creation should still fall within the scope of the patent for this creation.

1: Fan frame 11: Curing part 111: First joint surface 112: Second joint surface 1121: Shoulder 1122: Limiting part 113: Step 13: Shaft 131: First end 132: Second end 14: Bearing 2: Stator assembly 21: Silicon steel sheet assembly 22: Insulation frame 3: Rotor assembly 31: Shaft 32: Hub 33: Blades

Figure 1A is a schematic diagram of a known fan stator fixing structure; Figure 1B is a schematic diagram of a known fan stator fixing structure; Figure 1C is a three-dimensional schematic diagram of a known fan; Figure 2A is a decomposed schematic diagram of the stator fixing structure of the present invention; Figure 2B is a cross-sectional schematic diagram of the stator fixing structure of the present invention.

1: Fan frame

11: Curing section

111: First bonding surface

112: Second bonding surface

1121: Shoulder

1122: Limiting part

113: Class

13: Axle tube

131: First end

132: Second end

14: Bearings

2: Stator assembly

21: Silicon steel sheet set

22: Insulation frame

3: Rotor assembly

31: Axis

32: wheel hub

33: Leaves

Claims (7)

A fan stator fixing structure includes: A fan frame, a solidifying portion extending vertically on one side, a shaft tube inserted into the interior of the solidifying portion, and a stator assembly sleeved on the outer edge of the solidifying portion, and the solidifying portion is heated and reshaped to directly fix the shaft tube and the stator assembly on the fan frame at the same time. As described in item 1 of the patent application scope, the fan stator fixing structure, wherein the inner edge surface and the outer edge surface of the solidifying portion respectively form a first bonding surface and a second bonding surface; the outer edge of the shaft tube is attached to the first bonding surface; the stator assembly is sleeved on the outer edge of the solidifying portion and attached to the second bonding surface. The fan stator fixing structure as described in item 1 of the patent application scope, wherein the solidifying portion and the fan frame are integrally or non-integrally formed. As described in item 1 of the patent application scope, the fan stator fixing structure, wherein the stator assembly has a silicon steel sheet assembly, the silicon steel sheet assembly is sleeved on the second bonding surface of the solidifying portion, the lower end of the silicon steel sheet assembly contacts a shoulder of the solidifying portion, and the upper end of the silicon steel sheet assembly contacts a limit portion of the solidifying portion. The fan stator fixing structure as described in item 1 of the patent application scope, wherein the shaft tube is made of metal material. A fan stator fixing structure as described in Item 1 of the patent application, wherein the shaft tube length is greater than the solidification portion. A fan stator fixing structure as described in item 1 of the patent application, wherein the solidified portion is a thermoplastic material.

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