Salt spray prevention structure of the fan motor group

Abstract

The present invention provides a salt spray prevention structure for a fan motor group, comprising a silicon steel sheet group, an insulating frame group and a covering layer, wherein the silicon steel sheet group is provided with an upper side and a lower side, wherein the upper and lower sides are connected to an outer side and an inner side, and the inner side is surrounded by a coupling hole, the insulating frame group comprises an upper insulating frame and a lower insulating frame, wherein the upper and lower insulating frames are respectively arranged on the upper side and the lower side of the silicon steel sheet group, a coil group is wound around the upper and lower insulating frames and electrically connected to a circuit board, a first extension portion protruding from one side of the upper insulating frame protrudes into the coupling hole and covers a part or all of the inner side, the covering layer integrally covers the insulating frame group, the coil group, the silicon steel sheet group and the circuit board, and the first extension portion and the inner side not covered by the covering layer are sleeved with a shaft tube, and the outer side of the shaft tube directly or indirectly covers another part of the inner side, thereby achieving a salt spray prevention effect.

Description

Technical Field

[0001] The present invention relates to a fan motor assembly, in particular to a salt fog proof structure of the fan motor assembly which can prevent salt fog and prevent the inner side of a silicon steel sheet from rusting. Background Art

[0002] Current cooling fans primarily consist of a stator, impeller, circuit board, and fan frame. To ensure proper operation in these harsh environments, the fan's internal structure must be protected from salt spray and moisture. To prevent moisture and salt spray from corroding the stator and circuit board, which could damage the fan, existing technologies employ a method of encapsulating the stator and circuit board with adhesive to prevent damage.

[0003] At present, there are two ways to prevent salt spray: one is to use glue filling technology. Before glue filling, multiple silicon steel sheets must be stacked on each other to form a silicon steel sheet group, and an upper insulating frame and a lower insulating frame are assembled on the upper and lower sides respectively. Then, the assembled silicon steel sheet group and the upper and lower insulating frames are placed on a winding machine. An opening is opened in the center of the inner side of the silicon steel sheet group and is sleeved on a winding mold rod of the winding machine. The inner side of the silicon steel sheet group is concavely provided with two anti-fouling holes connected to the opening, which are exposed to the outside and not covered by the upper and lower insulating frames. After the two anti-fouling holes are plugged into and firmly positioned with the two protruding parts protruding from the outer side of the winding mold rod of the winding machine, the winding machine can start the winding operation on the upper and lower insulating frames. After the winding is completed, one end of the coil is electrically connected to the circuit board arranged at the bottom of the lower insulating frame (such as welding) and the inspection operation is completed to form a motor group, and then the assembled motor group is glued. However, since the glue potting mold used when pouring glue on the motor unit is not a real match, the glue in the glue potting mold will flow into the openings of the silicon steel sheets of the motor unit during the glue potting process, leaving glue inside the openings of the silicon steel sheets of the motor unit, making it difficult to assemble on the shaft tube (shaft cylinder) of the fan, and causing assembly problems.

[0004] Therefore, in order to solve the above problem, the industry has made a solid match between the middle tube of the upper and lower molds in the glue-filling mold and the opening of the silicon steel sheet group and the two fool-proof holes. When the motor group is placed in the upper and lower molds of the glue-filling mold, the inner side of the opening of the silicon steel sheet group is fitted with the middle tube of the upper and lower molds in the glue-filling mold, and the outer side of the middle tube is tightly attached to the inner side of the opening of the silicon steel sheet and sealed. At the same time, the upper half of the two fool-proof holes of the silicon steel sheet will be covered and sealed by the upper mold, and the lower half of the two fool-proof holes will be covered and sealed by the upper mold. The motor assembly is then sealed by two protruding bodies extending from the outer side of the middle tube of the lower mold, thereby preventing the glue from flowing into the opening and the two anti-fouling holes during glue injection. After confirming again that the motor assembly is indeed fixed and sealed in the upper and lower molds of the glue injection mold to prevent up and down and left and right shaking from causing the motor size to be misaligned, the glue can be injected into the glue injection mold until the glue solidifies and then the motor assembly with glue injection is removed from the glue injection mold. This glue injection method mainly uses glue to fill the space around the stator and circuit board to prevent salt spray.

[0005] However, when the glue is poured, the openings and the two anti-fouling holes of the silicon steel sheet group are sealed by the inner tube of the glue pouring mold and the two outer protrusions thereof and are not poured with glue. This allows the motor group that has been filled with glue to be smoothly assembled on the shaft tube of the fan. However, this leads to a problem. When the fan is operated in a humid or salty environment, the salt mist or water vapor will penetrate through the openings and the two anti-fouling holes of the silicon steel sheet group and be corroded by the salt mist or water vapor, causing rust. The rust and water vapor then produce rusty water, which will flow through the openings and the two anti-fouling holes of the silicon steel sheet group, causing the entire inner side of the silicon steel sheet group to rust. Finally, the rusty water in the two anti-fouling holes will be thrown out as the fan rotates, causing the inside of the fan to be sprayed with rusty water. This rusty water will cause a bearing inside the fan to get stuck, thereby preventing the fan from operating. In addition, during the assembly process in which the openings of the silicon steel sheet group are sequentially sleeved on the winding die rod of the winding machine and the middle tube of the glue-filling mold, the winding die rod and the middle tube are likely to accidentally scrape off the electroplated layer applied on the silicon steel sheet, causing the scraped areas on the inside of the silicon steel sheet to rust faster.

[0006] Another approach involves vacuum coating the assembled motor assembly directly with a thin film. While this thin film, made of an extremely thin polymer, provides salt spray protection, it's currently not widely used. This is because the film only protects the fan motor from salt spray for a short period of time (e.g., 50 hours or less) in a salt spray and humid environment. However, it loses its salt spray protection after prolonged exposure (e.g., 750 hours). Over time, the film is subject to friction from salt crystals, causing it to break and lose its salt spray resistance. This allows salt spray to penetrate, causing rust and short-circuit damage to the circuit boards. Furthermore, during assembly of the coated motor assembly onto the fan shaft, the film on the inner side of the silicon steel sheet assembly rubs against the outer side of the shaft, easily scratching and forming holes. This allows salt spray to penetrate through the holes and into the inner side of the silicon steel sheet assembly, causing rust. These factors are the main reasons why this approach is currently not used.

[0007] Therefore, how to solve the above problems and deficiencies is the direction that the inventors of this case and related manufacturers engaged in this industry are eager to study and improve. Summary of the Invention

[0008] An object of the present invention is to provide a fan motor assembly salt fog prevention structure that can achieve salt fog prevention effect.

[0009] Another object of the present invention is to provide a salt spray proof structure for a fan motor assembly that seals the gap by covering the inner side of a silicon steel sheet assembly to prevent salt spray from invading, thereby preventing rust.

[0010] To achieve the above-mentioned object, the present invention provides a salt spray protection structure for a fan motor assembly, characterized in that it comprises:

[0011] A silicon steel sheet group is provided with an upper side and a lower side, wherein the upper side and the lower side are connected to an outer side and an inner side, and the inner side is surrounded to form a coupling hole;

[0012] an insulating frame assembly, comprising an upper insulating frame and a lower insulating frame, the upper insulating frame and the lower insulating frame being respectively disposed on the upper side and the lower side of the silicon steel sheet assembly, a coil assembly being wound around the upper insulating frame and the lower insulating frame and electrically connected to a circuit board, a first extension portion extending from one side of the upper insulating frame into the coupling hole and covering a portion or all of the inner side; and

[0013] A covering layer integrally covers the insulating frame assembly, the coil assembly, the silicon steel sheet assembly and the circuit board, and the first extension portion and the inner side not covered by the covering layer are sleeved with a shaft tube, and the outer side of the shaft tube directly or indirectly covers another part of the inner side.

[0014] The salt spray protection structure of the fan motor group is described, wherein: the outer side of the shaft tube protrudes with a platform portion, the first extension portion protrudes into the coupling hole and covers a portion of the inner side of the silicon steel sheet group, and abuts against the platform portion, and another portion of the inner side of the silicon steel sheet group is directly covered by the outer side of the platform portion of the shaft tube.

[0015] The salt spray proof structure of the fan motor assembly is described, wherein: a second extension portion protrudes from one side of the lower insulating frame, protruding into the combining hole and covering another part of the inner side of the silicon steel sheet group, and connecting with the first extension portion to fully cover the entire inner side of the silicon steel sheet group.

[0016] The salt spray proof structure of the fan motor group is described, wherein: the outer side of the shaft tube protrudes with a platform portion, the platform portion abuts against the outer side of the second extension portion, and the inner side of the silicon steel sheet group is indirectly covered by the outer side of the platform portion of the shaft tube through the first extension portion and the second extension portion.

[0017] The fan motor assembly salt spray proof structure, wherein: the upper insulating frame and the lower insulating frame are integrally formed or non-integrally formed.

[0018] The fan motor group anti-salt spray structure, wherein: the inner side of the silicon steel sheet group is longitudinally formed with at least one groove, the outer side of the first extension portion longitudinally protrudes with at least one first protrusion protruding into the groove for covering and combining.

[0019] The salt spray proof structure of the fan motor group is described, wherein: at least one groove is formed longitudinally on the inner side of the silicon steel sheet group, at least one first convex portion and at least one second convex portion are respectively extended longitudinally on the outer sides of the first extension portion and the second extension portion, and the first convex portion and the second convex portion are respectively extended into the groove with an upper half and a lower half covering and combining.

[0020] The fan motor group anti-salt spray structure, wherein: the shape of the inner side of the silicon steel sheet group is the same as the shape of the outer side of the shaft tube.

[0021] The fan motor assembly salt spray protection structure, wherein: the second extension portion is longitudinally recessed with at least one groove on the inner side relative to the second convex portion, and the groove is engaged with at least one protrusion extending from the outer side of the shaft tube.

[0022] By adopting the salt spray protection structure design of the fan motor assembly of the present invention, the inner side of the silicon steel sheet assembly is enclosed by the first extension portion of the upper insulating frame and the outer side of the shaft tube, or by the first and second extension portions of the insulating frame assembly, thereby effectively achieving the effect of protecting the inner side of the silicon steel sheet assembly from salt spray and rust. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of the fan motor assembly and the shaft seat of the present invention.

[0024] Figure 2A It is a schematic exploded perspective view of the silicon steel sheet group and the upper and lower insulating frames of the present invention.

[0025] Figure 2B This is a schematic diagram of an exploded perspective view of an alternative silicon steel sheet group and upper and lower insulating frames.

[0026] Figure 3 It is a cross-sectional schematic diagram of another alternative implementation of the fan motor assembly and the shaft seat.

[0027] Figure 4 It is a schematic exploded perspective view of the fan of the present invention.

[0028] Explanation of reference numerals: fan motor group salt spray protection structure 1; silicon steel sheet group 11; silicon steel sheet 110; upper side 111; lower side 112; outer side 113; inner side 114; groove 115; coupling hole 116; opening 117; notch 118; pole 119; insulating frame group 12; upper insulating frame 121; upper insulating body 1211; first extension portion 1212; first protrusion 1213; first through hole 1214; upper guard Plate portion 1215; lower insulating frame 122; lower insulating body 1221; second extension portion 1222; second protrusion 1223; second through hole 1224; lower guard plate portion 1225; groove 1226; coil assembly 13; covering layer 14; circuit board 15; fan 2; fan frame 21; shaft seat 22; shaft tube 221; platform portion 2211; outer side 22110; convex ring 2212; protrusion 2213; fan wheel 24. DETAILED DESCRIPTION

[0029] The above-mentioned objectives and structural and functional characteristics of the present invention will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0030] The present invention is a fan motor group anti-salt spray structure 1, please refer to Figure 1 、 Figure 2A 4 , in this embodiment, the fan motor assembly salt spray protection structure 1 is applied to a fan 2 , such as an axial fan or a centrifugal fan. The fan 2 includes a fan frame 21 , a fan impeller 24 , and a motor assembly (i.e., the fan motor assembly salt spray protection structure 1 of the present invention). A shaft seat 22 is centrally disposed within the fan frame 21 . A shaft tube 221 protrudes from the shaft seat 22 , onto which the motor assembly is sleeved. The shaft tube 221 can be a metal shaft tube 221 (e.g., a copper shaft tube 221 ) or a plastic shaft tube 221 . The impeller 24 is accommodated within the fan frame 21 . An axis disposed in the center of the impeller 24 is pivotally mounted to the shaft tube 221 , and a cover is disposed on the periphery of the motor assembly so that a magnetic element disposed within the impeller 24 is inductively excited by the motor assembly. In a specific implementation, the fan 2 can also be applied to other types of fans (e.g., a centrifugal fan).

[0031] The fan motor assembly salt spray protection structure 1 (i.e., the motor assembly) includes a silicon steel sheet assembly 11, an insulating frame assembly 12, and a coating layer 14. The silicon steel sheet assembly 11 is composed of a plurality of silicon steel sheets 110 stacked together, and has an upper side 111 and a lower side 112. The upper side 111 and the lower side 112 are connected to an outer side 113 and an inner side 114. The inner side 114 is surrounded by a coupling hole 116. That is, the coupling hole 116 is composed of an opening 117 opened in the center of each silicon steel sheet 110 stacked together along the longitudinal direction (axial direction). The coupling hole 116 is used to be mounted on the shaft tube 221. In addition to being provided for fitting and fixing with the shaft tube 221 during assembly of the fan 2, the coupling holes 116 of the silicon steel sheet group 11 of the motor assembly of the present invention can also be used to fit with a winding mold rod of a winding machine (not shown) during the glue pouring and winding operations, and can be used to fit with a middle tube of an upper and lower mold in a glue pouring mold (not shown).

[0032] In addition, the inner side 114 of each silicon steel sheet 110 is inwardly contracted (i.e., toward the outer side 113) and is provided with at least one notch 118. The notch 118 (two notches 118 are shown in this figure) is connected to the opening 117. The notches 118 of the plurality of silicon steel sheets 110 are stacked longitudinally, so that the notches 118 on the inner side 114 of the silicon steel sheet group 11 are stacked longitudinally to form at least one groove 115 (e.g., Figure 2A ), the groove 115 (two grooves 115 are shown in this figure) has anti-fool and positioning functions, which are used to provide two convex parts protruding from the outside of the winding mold rod of the winding machine (not shown) for insertion and positioning, so as to facilitate the winding operation, and provide two convex parts protruding from the outside of the middle tube of the lower mold of the glue pouring mold for insertion and positioning, so as to facilitate the glue pouring operation.

[0033] The insulating frame group 12 includes an upper insulating frame 121 and a lower insulating frame 122. The upper and lower insulating frames 121 and 122 are respectively arranged on the upper side 111 and the lower side 112 of the silicon steel sheet group 11, so that the silicon steel sheet group 11 is sandwiched between the upper and lower insulating frames 121 and 122. A coil group 13 is radially wound around the upper and lower insulating frames 121 and 122 to form a stator with the silicon steel sheet group 11 sandwiched between the upper and lower insulating frames 121 and 122. The head and tail ends of coil assembly 13 are fixed to the lower insulating frame 122, with two conductive brackets (not shown) protruding from the outside. One end of each conductive bracket extends through the lower insulating frame 122 and is electrically connected to the silicon steel sheet assembly 11. The other ends of each conductive bracket are welded to a circuit board 15 and electrically connected to the head and tail ends of the upper coil assembly 13. This allows the upper and lower insulating frames 121, 122, the silicon steel sheet assembly 11, the coil assembly 13, and the circuit board 15 to form a non-plasticized motor assembly. In this embodiment, the upper and lower insulating frames 121, 122 are not integrally formed, but this is not limiting. The upper and lower insulating frames 121, 122 can also be integrally formed.

[0034] Furthermore, the upper insulating frame 121 has an upper insulating body 1211, the upper insulating body 1211 has a first through hole 1214 and a plurality of upper guard plates 1215, the first through hole 1214 is aligned with the coupling hole 116, the plurality of upper guard plates 1215 are radially extended outward from the outer wall of the upper insulating body 1211, and the plurality of upper guard plates 1215 are used to cover the upper side 111 of the plurality of poles 119 corresponding to the silicon steel sheet group 11, and A first extension portion 1212 protrudes outward from one side of the upper insulating body 1211. The first extension portion 1212 protrudes downward around the bottom of the upper insulating body 1211 of the first through hole 1214 to protrude into the coupling hole 116 of the silicon steel sheet group 11 and cover (or cover, shield) a portion (such as the upper half of the inner side 114 is covered) or all (such as the entire inner side 114 is covered) of the inner side 114 of the silicon steel sheet group 11. At least one first protrusion 1213 protrudes longitudinally from the outer side of the first extension 1212. The first protrusion 1213 (two first protrusions 1213 are shown in this figure) protrudes into the groove 115 of the silicon steel sheet group 11 (such as the upper half of the two grooves 115) to cover and combine (wherein the shape of the first protrusion 1213 matches the shape of the groove 115) to seal the groove 115, preventing external moisture or salt mist from entering the groove 115, thereby preventing the inner side 114 of the silicon steel sheet group 11 from rusting. Therefore, the present invention can effectively solve the existing problem of salt mist invading and corroding the coils, silicon steel sheets, etc. through the openings and anti-fouling holes of the silicon steel sheet group, causing rust and rusty water to spray out and cause the internal bearings of the fan 2 to stick.

[0035] The lower insulating frame 122 corresponds to the upper insulating frame 121 and has a lower insulating body 1221. The lower insulating body 1221 has a second through hole 1224 and a plurality of lower guard plate portions 1225. The second through hole 1224 is aligned with the combining hole 116. The plurality of lower guard plate portions 1225 extend radially outward from the outer wall of the lower insulating body 1221. The plurality of lower guard plate portions 1225 are used to cover the lower side 112 of the plurality of poles 119 corresponding to the silicon steel sheet group 11.

[0036] Continue reading Figure 1 、 Figure 4 The covering layer 14 integrally covers the insulating frame group 12, the coil group 13, the silicon steel sheet group 11 and the circuit board 15, and the first extension portion 1212 and the inner side 114 not covered by the covering layer 14 are connected to the shaft tube 221, and the outer side of the shaft tube 221 directly or indirectly covers another part of the inner side 114. In this embodiment, the covering layer 14 is placed in the upper and lower molds of the glue-filling mold and then glue is poured. After the glue in the glue-filling mold solidifies, the covering layer 14 only covers the insulating frame group 12, the coil group 13, the upper and lower sides 111, 112 and the outer side 113 of the silicon steel sheet group 11 and the circuit board 15, while the entire inner side 114 of the silicon steel sheet group 11 is not covered by the covering layer 14, and the upper insulating frame 121 is provided. The outer side of the first extension 1212 abuts and covers the upper half of the inner side 114 of the silicon steel sheet assembly 11. The inner side of the first extension 1212 is tightly fitted with the upper half of the outer side of the shaft tube 221. The lower half of the inner side 114 of the silicon steel sheet is directly abutted and covered by the lower half of the outer side of the shaft tube 221. This prevents the inner side 114 of the silicon steel sheet assembly 11 from external salt spray intrusion, thereby achieving a rust-proof effect. In addition, in a specific implementation, a colloid can be applied between the contact points where the outer side of the first extension 1212 and the lower half of the inner side 114 of the silicon steel sheet assembly 11 abut against the outer side of the shaft tube 221 to enhance the sealing and bonding properties of the contact points.

[0037] The outer shape of the shaft tube 221 is the same as the inner shape 114 of the silicon steel sheet assembly 11 , that is, the outer shape of the shaft tube 221 changes accordingly with the shape of the inner shape 114 of the silicon steel sheet assembly 11 . The outer side of the shaft tube 221 protrudes with a platform portion 2211, which abuts against one end (i.e., the free end) of the first extension portion 1212 that covers the inner side 114. The other part of the inner side 114 of the silicon steel sheet group 11 (i.e., the lower half of the inner side 114) is directly covered by the outer side 22110 of the platform portion 2211 of the shaft tube 221, and the outer side 22110 of the platform portion 2211 protrudes outward from the position of the groove 115 with at least one protrusion 2213. The protrusion 2213 (two protrusions 2213 are shown in this figure) protrudes into the lower half of the groove 115 and connects with the first protrusion 1213 of the upper insulating frame 121. The outer coating 14 of the lower side 112 of the silicon steel sheet assembly 11 abuts against the upper surface of a protruding ring 2212 extending from the outer side of the shaft tube 221. A side surface of the protruding ring 2212 abuts against the outer coating 14 of the side surface of the lower insulating frame body 1221. In addition to providing support, the protruding ring 2212 also improves the sealing between the outer coating 14 of the lower side 112 of the silicon steel sheet assembly 11 and the outer coating 14 of the lower insulating frame body 1221, thereby enhancing the salt spray protection effect. However, the protruding ring 2212 can be omitted in actual implementation. Simply having the outer side 22110 of the platform portion 2211 of the shaft tube 221 tightly cover the lower half of the inner side 114 of the silicon steel sheet assembly 11 is sufficient to provide salt spray and rust prevention.

[0038] In another alternative embodiment, see Figure 2B 、 Figure 3 , supplementary reference Figure 4As shown in the figure, the structure and shape of the lower insulating frame 122 are the same as those of the upper insulating frame 12, that is, a second extension portion 1222 is protruded from one side of the lower insulating body 1221, and the second extension portion 1222 is protruded upward along the bottom of the lower insulating body 1221 of the second through hole 1224 to protrude into the coupling hole 116 of the silicon steel sheet group 11 and cover another part of the inner side 114 of the silicon steel sheet group 11 (such as the lower half of the inner side 114), and the second One end (i.e., the free end) of the extension portion 1222 is in abutment with the free end of the first extension portion 1212 to form a whole, so as to fully cover the entire inner side 114 of the silicon steel sheet group 11 to prevent salt spray intrusion, and the platform portion 2211 of the shaft tube 221 is in abutment with the outer side of the second extension portion 1222 of the upper insulating frame 12, and the inner side 114 of the silicon steel sheet group 11 is indirectly covered by the shaft tube 221 and the outer side 22110 of the platform portion 2211 via the first and second extension portions 1212 and 1222. At least one second protrusion 1223 is longitudinally extended from the outer side of the second extension portion 1222, and at least one groove 1226 is longitudinally recessed on the inner side of the second extension portion 1222 relative to the second protrusion 1223. The second protrusion 1223 (two second protrusions 1223 are shown in this figure) protrudes into the lower half of the groove 115 of the silicon steel sheet group 11 and covers and combines with the first protrusion 1213 covering the upper half of the groove 115, so as to jointly seal the entire groove 115, so that external moisture or salt mist cannot enter the groove 115, thereby preventing the inner side 114 of the silicon steel sheet group 11 from rusting. The groove 1226 (two grooves 1226 are shown in this figure) is used to provide two protrusions of the winding mold rod placed on the winding machine (not shown) for insertion and positioning, so as to facilitate the winding operation, and to provide two protrusions of the tube placed in the lower mold of the glue pouring mold for insertion and positioning, so as to facilitate the glue pouring operation. In addition, the groove 1226 can also provide a protrusion 2213 corresponding to the shaft tube 221 of the fan when the fan 2 is assembled.

[0039] By adopting the above-mentioned salt spray protection structure 1 of the fan motor assembly of the present invention, the inner side 114 of the silicon steel sheet assembly 11 is enclosed by the first extension portion 1212 of the upper insulating frame 121 and the outer side of the shaft tube 221, or by the first and second extension portions 1212 and 1222 of the insulating frame assembly 12, thereby effectively achieving the effect of protecting the inner side 114 of the silicon steel sheet assembly 11 from salt spray and rust.

[0040] The above description is only illustrative of the present invention and not restrictive. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, and all of them will fall within the scope of protection of the present invention.

Claims

1. A fan motor group anti-salt spray structure, characterized in that: include: A silicon steel sheet group is provided with an upper side and a lower side, wherein the upper side and the lower side are connected to an outer side and an inner side, and the inner side is surrounded to form a coupling hole; an insulating frame assembly, comprising an upper insulating frame and a lower insulating frame, the upper insulating frame and the lower insulating frame being respectively disposed on the upper side and the lower side of the silicon steel sheet assembly, a coil assembly being wound around the upper insulating frame and the lower insulating frame and electrically connected to a circuit board, a first extension portion extending from one side of the upper insulating frame into the coupling hole and covering a portion or all of the inner side; and A covering layer integrally covers the insulating frame assembly, the coil assembly, the silicon steel sheet assembly and the circuit board, and the first extension portion and the inner side not covered by the covering layer are sleeved with a shaft tube, and the outer side of the shaft tube directly or indirectly covers another part of the inner side.

2. The anti-salt spray structure of the fan motor assembly according to claim 1, characterized in that: The outer side of the shaft tube protrudes with a platform portion, the first extension portion protrudes into the coupling hole and covers a portion of the inner side of the silicon steel sheet group and abuts against the platform portion, and the other portion of the inner side of the silicon steel sheet group is directly covered by the outer side of the platform portion of the shaft tube.

3. The anti-salt spray structure of the fan motor assembly according to claim 1, characterized in that: A second extension portion extends from one side of the lower insulating frame and extends into the combining hole to cover another portion of the inner side of the silicon steel sheet group and connects with the first extension portion to fully cover the entire inner side of the silicon steel sheet group.

4. The anti-salt spray structure of the fan motor assembly according to claim 3, characterized in that: The outer side of the shaft tube protrudes with a platform portion, which abuts against the outer side of the second extension portion. The inner side of the silicon steel sheet group is indirectly covered by the outer side of the platform portion of the shaft tube via the first extension portion and the second extension portion.

5. The anti-salt spray structure of the fan motor assembly according to claim 1, characterized in that: The upper insulating frame and the lower insulating frame are integrally formed or non-integrally formed.

6. The anti-salt spray structure of a fan motor assembly according to claim 1, characterized in that: At least one groove is formed longitudinally on the inner side of the silicon steel sheet group, and at least one first protrusion is longitudinally extended on the outer side of the first extension portion and extends into the groove for covering and combining.

7. The salt spray protection structure for a fan motor assembly according to claim 3, characterized in that: At least one groove is formed in the longitudinal direction of the inner side of the silicon steel sheet group, and at least one first convex portion and at least one second convex portion are respectively extended in the longitudinal direction from the outer sides of the first extension portion and the second extension portion, and the first convex portion and the second convex portion are respectively extended into the upper half and the lower half of the groove to cover and combine.

8. The fan motor assembly salt spray protection structure according to claim 1, characterized in that: The shape of the inner side of the silicon steel sheet group is the same as the shape of the outer side of the shaft tube.

9. The salt spray protection structure for a fan motor assembly according to claim 7, characterized in that: At least one groove is longitudinally recessed on the inner side of the second extension portion relative to the second protrusion, and the groove is engaged with at least one protrusion protruding from the outer side of the shaft tube.

Images