Motor cavity sealing structure

Abstract

The utility model discloses a motor cavity sealing structure which comprises a motor cavity arranged in the middle of a fan shell and a cover body covering the opening end of the motor cavity, a stator coil and a circuit board are arranged in the motor cavity, and a first sealing piece is arranged between the motor cavity and the cover body so that the motor cavity and the cover body can be connected in a sealed mode. The opening end of the motor cavity is provided with a wire outlet groove for the power line to extend out, the outer side of the wire outlet groove is further provided with a second sealing piece, the second sealing piece is attached to the outer side face of the wire outlet groove, and the power line penetrates through the second sealing piece so that the second sealing piece can seal the wire outlet groove. According to the utility model, the motor cavity is arranged, the stator coil and the circuit board are arranged in the motor cavity, and the motor cavity is sealed through the first sealing element and the second sealing element, so that coating on the surface of the motor or glue pouring treatment on the motor is not needed, the IPX5 effect is effectively realized, the installation is rapid, and the cost is relatively low.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field especially relates to a motor cavity sealing structure. BACKGROUND

[0002] Market fan application demands high IP, such as IPX5, IPX6 requirement satisfies more and more popular, traditional processing method is:

[0003] 1, the whole motor is coated with a layer of nanometer polymer material coating (Parylene coating) to meet the requirements, this scheme has two shortcomings: one is that the coating thickness is 15um-20um, very thin, easy to scratch damage and lead to failure, two is expensive, for example, 8038 fan, nanometer plating 4 yuan / PCS;

[0004] 2, the motor is processed by vacuum glue filling, this process product protection is very good, but also has two shortcomings: one is that the process is very complex, and the glue filling process needs 2-3 hours to complete; Two is the equipment / glue filling mold investment is high, the motor glue filling cost is high, for example, 8038 fan, vacuum glue filling cost 7 yuan / PCS. SUMMARY

[0005] The utility model discloses a motor cavity sealing structure to solve the problem of the prior art motor cavity sealing structure process complex, cost higher.

[0006] In order to realize the above-mentioned purpose, the utility model provides a motor cavity sealing structure, including the motor cavity that is located in the middle part of fan shell and the cover body that covers the opening end of motor cavity, the stator coil and circuit board are equipped in the motor cavity, the first sealing element is equipped between the motor cavity and the cover body to make the sealed connection between the motor cavity and the cover body, the opening end of the motor cavity is equipped with the wire outlet groove that is used for the power cord to extend, the second sealing element is also equipped on the outside of wire outlet groove, the second sealing element is attached to the outside of wire outlet groove and the power cord is equipped in the second sealing element to make the second sealing element seal wire outlet groove.

[0007] Preferably, the motor cavity includes the inner cavity wall and the outer cavity wall that surrounds the outside of inner cavity wall, the annular inner cavity is formed between the inner cavity wall and the outer cavity wall, the stator coil and the circuit board are equipped in the annular inner cavity.

[0008] Preferably, a connecting portion corresponding to the cover is arranged on the outer cavity wall, the connecting portion has a connecting end portion connected with the cover, the connecting end portion is provided with an annular protrusion, the cover is provided with a first annular groove for embedding the end portion of the inner cavity wall and a second annular groove for embedding the annular protrusion, the first seal comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged in the first annular groove to seal the first annular groove and the inner cavity wall, and the second sealing ring is arranged in the second annular groove to seal the second annular groove and the annular protrusion.

[0009] Preferably, the inner side of the connecting portion is provided with the wire outlet groove, the outer side of the wire outlet groove is provided with a sealing groove for mounting the second seal, the second seal is embedded in the sealing groove, and the second seal is further provided with a mounting through hole for penetrating the power line.

[0010] Preferably, the second seal is in a block shape, the power line comprises a positive line, a negative line and a signal line, the wire outlet groove is provided with a first groove, a second groove and a third groove arranged side by side and spaced apart corresponding to the positive line, the negative line and the signal line respectively, the mounting through hole is three and arranged side by side, and the three mounting through holes are arranged corresponding to the positive line, the negative line and the signal line respectively, the second seal is cut along the arrangement direction of the three mounting through holes from one end of the second seal to the other end of the second seal to form a gap, the gap penetrates the three mounting through holes and does not penetrate the other end of the second seal.

[0011] Preferably, the second sealing ring is located directly above the second seal and is crimped on the second seal.

[0012] Preferably, the outer cavity wall comprises a main body portion, a transition portion and the connecting portion, the main body portion is in a columnar shape, the transition portion is in an annular plate shape, the inner side end of the transition portion is connected with the main body portion and the outer side end of the transition portion is connected with the connecting portion, a first annular cavity is formed between the main body portion and the inner cavity wall, the stator coil is arranged in the first annular cavity, a second annular cavity is formed between the connecting portion and the inner cavity wall, the circuit board is arranged in the second annular cavity, and the first annular cavity and the second annular cavity form the annular inner cavity.

[0013] Preferably, the circuit board is annular and arranged around the inner cavity wall, and the circuit board is electrically connected with the power line.

[0014] Preferably, the outer edge of the connecting end portion is provided with a stop edge corresponding to the side surface of the cover, and the cover is embedded in the stop edge.

[0015] Preferably, the outer side of the connecting part is provided with a plurality of clamping protrusions for fixing the cover body, the cover body is provided with a plurality of buckling members corresponding to the clamping protrusions, the buckling members are provided with buckling openings, and the buckling members are located on the outer side of the connecting part so that the clamping protrusions are clamped with the buckling openings.

[0016] Compared with the prior art, the utility model discloses a motor cavity is set up and the stator coil and circuit board are arranged in the motor cavity, and the motor cavity is sealed through the first sealing piece and the second sealing piece, so that the coating of the surface of the motor or the glue filling treatment of the motor is not needed, the effect of IPX5 is effectively realized, the installation is quick, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure diagram of the fan in the embodiment of the utility model.

[0018] Figure 2 It is a structure diagram of the shell of the fan in the embodiment of the utility model.

[0019] Figure 3 It is Figure 2 It is an enlarged view of the place A in the figure.

[0020] Figure 4 It is a structure diagram of the cover body in the embodiment of the utility model.

[0021] Figure 5 It is a structure diagram of the second sealing piece in the embodiment of the utility model.

[0022] Figure 6 It is a structure diagram of the fan after the cover body is removed in the embodiment of the utility model.

[0023] Figure 7 It is Figure 6 It is an enlarged view of the place B in the figure.

[0024] Figure 8 It is a sectional structure diagram of the fan in the embodiment of the utility model.

[0025] Figure 9 It is Figure 8 It is an enlarged view of the place C in the figure.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 10. Fan; 1. Housing; 2. Motor cavity; 21. Outer cavity wall; 22. Inner cavity wall; 23. Main body; 24. Transition portion; 25. Connecting portion; 251. Annular protrusion; 252. Wire outlet groove; 2521. First groove; 2522. Second groove; 2523. Third groove; 253. Sealing groove; 254. Side rib; 26. First annular cavity; 27. Second annular cavity; 28. Snap-fit ​​protrusion; 3. Cover; 31. First annular groove; 32. Second annular groove; 33. Fastener; 331. Fastening opening; 41. First sealing ring; 42. Second sealing ring; 5. Second sealing member; 51. Mounting through hole; 52. Gap; 6. Circuit board DETAILED DESCRIPTION

[0028] In order to explain the technical content, structural features and effects achieved by the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0029] like Figures 1 to 9 As shown, an embodiment of the utility model provides a motor cavity sealing structure, including a motor cavity 2 arranged in the middle of the fan 10 housing 1 and a cover 3 covering the open end of the motor cavity 2, a stator coil and a circuit board 6 are provided in the motor cavity 2, and a first sealing member is provided between the motor cavity 2 and the cover 3 to ensure a sealed connection between the motor cavity 2 and the cover 3; a wire outlet groove 252 for extending the power cord is provided on the open end of the motor cavity 2, and a second sealing member 5 is also provided on the outside of the wire outlet groove 252, the second sealing member 5 is attached to the outer side of the wire outlet groove 252 and the power cord is passed through the second sealing member 5 so that the second sealing member 5 seals the wire outlet groove 252. Specifically, the stator coil and circuit board 6 of the live part of the fan 10 are both arranged in the motor cavity 2, and the open end of the motor cavity 2 is sealed by a first seal and the outlet groove 252 of the power cord is sealed by a second seal 5, thereby achieving the sealing of the motor cavity 2. As a result, the sealing structure of the motor cavity 2 of the embodiment of the utility model can effectively prevent liquid from entering the live part of the motor cavity 2 in the IPX5 level water spray test, thereby protecting the live motor from damage.

[0030] The embodiment of the utility model sets a motor cavity 2 and sets the stator coil and the circuit board 6 in the motor cavity 2, and seals the motor cavity 2 through the first seal and the second seal 5. There is no need to coat the surface of the motor or to perform glue filling on the motor, and the IPX5 effect is effectively achieved. The installation is quick and the cost is low.

[0031] In the embodiment of the present utility model, Figure 2 as well as Figure 8As shown in the figure, the motor cavity 2 comprises an inner cavity wall 22 and an outer cavity wall 21 surrounding the outer side of the inner cavity wall 22, and an annular inner cavity is formed between the inner cavity wall 22 and the outer cavity wall 21, and the stator coil and the circuit board 6 are arranged in the annular inner cavity. Specifically, the inner cavity wall 22 and the outer cavity wall 21 form an open end at one end, and the other end is connected to each other by a bottom wall to form an integral body, and the fan 10 housing 1 can be integrally formed to form the inner cavity wall 22, the outer cavity wall 21 and the bottom wall connected to each other.

[0032] In the embodiment of the utility model, as shown in the figure, Figures 2 to 9 As shown in the figure, the outer cavity wall 21 is provided with a connecting portion 25 corresponding to the cover body 3, the connecting portion 25 has a connecting end portion connected with the cover body 3, the connecting end portion is provided with a ring-shaped protrusion 251, the cover body 3 is provided with a first annular groove 31 for embedding the end portion of the inner cavity wall 22 and a second annular groove 32 for embedding the ring-shaped protrusion 251, the first sealing member comprises a first sealing ring 41 and a second sealing ring 42, the first sealing ring 41 is arranged in the first annular groove 31 to seal and connect the first annular groove 31 and the inner cavity wall 22, and the second sealing ring 42 is arranged in the second annular groove 32 to seal and connect the second annular groove 32 and the ring-shaped protrusion 251. It should be noted that the connection mode of the outer cavity wall 21, the inner cavity wall 22 and the cover body 3 is not limited, as long as the sealing member can be used to seal and connect the outer cavity wall 21, the inner cavity wall 22 and the cover body 3 respectively.

[0033] In the embodiment of the utility model, as shown in the figure, Figures 8 to 9 As shown in the figure, the outer edge of the connecting end portion is provided with a stop edge 254 corresponding to the side surface of the cover body 3, and the cover body 3 is embedded in the stop edge 254. The setting of the stop edge 254 facilitates the installation of the cover body 3 and further ensures the sealing performance of the motor cavity 2.

[0034] In the embodiment of the utility model, as shown in the figure, Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown in the figure, the outer side surface of the connecting portion 25 is provided with a plurality of clamping protrusions 28 for fixing the cover body 3, the cover body 3 is provided with a plurality of buckling members 33 corresponding to the clamping protrusions 28, the buckling members 33 are provided with buckling openings 331, and the buckling members 33 are located on the outer side of the connecting portion 25 to make the clamping protrusions 28 and the buckling openings 331 clamped. Specifically, by arranging the buckling members 33 on the cover body 3 and arranging the clamping protrusions 28 on the outer side surface of the connecting portion 25, the cover body 3 and the motor cavity 2 are conveniently connected with each other, and the first sealing member and the second sealing member 5 are pressed and connected respectively, so as to effectively ensure the sealing performance of the motor cavity 2.

[0035] In the embodiment of the utility model, as shown in the figure, Figures 2 to 9As shown, the inner side of the connecting part 25 is provided with an outlet slot 252, and the outer side of the outlet slot 252 is provided with a sealing groove 253 for mounting the second sealing member 5, the second sealing member 5 is embedded in the sealing groove 253, and the second sealing member 5 is further provided with a mounting through hole 51 for the power line to pass through. The utility model embodiment sets the sealing groove 253 corresponding to the size of the second sealing member 5 on the outer side of the connecting part 25 away from the annular inner cavity, and sets the inner side of the connecting part 25 with the outlet slot 252, so that the second sealing member 5 is attached to the outer side of the outlet slot 252 to seal the outlet slot 252.

[0036] Specifically, the second sealing member 5 is block-shaped, the power line includes a positive line, a negative line and a signal line, the outlet slot 252 is provided with first, second and third slots 2521, 2522 and 2523 arranged side by side and spaced apart corresponding to the positive line, the negative line and the signal line, the mounting through hole 51 is three arranged side by side and corresponding to the positive line, the negative line and the signal line, and the second sealing member 5 is cut along the arrangement direction of the three mounting through holes 51 from one end of the second sealing member 5 to the other end of the second sealing member 5 to form a gap 52, the gap 52 penetrates the three mounting through holes 51 and does not penetrate the other end of the second sealing member 5. The utility model embodiment sets the gap 52 so that the second sealing member 5 can be opened to facilitate the installation of the positive line, the negative line and the signal line, and the design is ingenious. It should be noted that the power line can also include only two electrically connected lines, namely the positive line and the negative line, at this time, the outlet slot 252 can include only the first and second slots 2521 and 2522 arranged side by side, and in some other embodiments, the power line can include three or more electrically connected lines, at this time, the outlet slot 252 is set according to the number of specific electrically connected lines.

[0037] Further, the second sealing ring 42 is located directly above the second sealing member 5 and is crimped on the second sealing member 5. Figures 6 to 7 As shown, the sealing groove 253 penetrates part of the annular protrusion 251 so that the annular protrusion 251 is C-shaped, so that the second sealing ring 42 is crimped on the second sealing member 5, further fixing the second sealing member 5, and ensuring the sealing performance of the second sealing member 5.

[0038] In the embodiment of the utility model, the outer cavity wall 21 includes a main body part 23, a transition part 24 and a connecting part 25, the main body part 23 is in a column shape, the transition part 24 is in a ring plate shape, the inner side end of the transition part 24 is connected with the main body part 23 and the outer side end of the transition part 24 is connected with the connecting part 25, the first ring cavity 26 is formed between the main body part 23 and the inner cavity wall 22, the stator coil is arranged in the first ring cavity 26, the second ring cavity 27 is formed between the connecting part 25 and the inner cavity wall 22, the circuit board 6 is arranged in the second ring cavity 27, and the first ring cavity 26 and the second ring cavity 27 form the annular inner cavity. Specifically, the area of the second ring cavity 27 is larger than the area of the first ring cavity 26 by arranging the transition part 24, so that the size of the installable circuit board 6 is larger, and the flexibility of the circuit board 6 design is increased.

[0039] In the embodiment of the utility model, the circuit board 6 is in a ring shape and is arranged around the inner cavity wall 22, and the circuit board 6 is electrically connected with the power line. The circuit board 6 is arranged in the second ring cavity 27, so that the power line is conveniently led out and the design of the outlet slot 252 is facilitated.

[0040] The above disclosed is only the preferred embodiment of the utility model, of course, cannot with this to limit the utility model right scope, therefore the equivalent change made by the utility model application patent scope still belongs to the range covered by the utility model.

Claims

1. A motor cavity seal structure, characterized by, The motor cavity is arranged in the middle of the fan shell, and a cover is arranged on the opening end of the motor cavity. The opening end of the motor cavity is provided with a wire outlet groove for the power supply wire to extend out, and the outer side of the wire outlet groove is also provided with a second sealing element.

2. The motor cavity seal structure of claim 1, wherein, The motor cavity includes an inner cavity wall and an outer cavity wall arranged outside the inner cavity wall, and an annular inner cavity is formed between the inner cavity wall and the outer cavity wall.

3. The motor cavity seal structure of claim 2, wherein, The outer cavity wall is provided with an annular connecting portion corresponding to the cover, and the connecting portion has a connecting end portion connected with the cover.

4. The motor cavity seal structure of claim 3, wherein, The inner side of the connecting portion is provided with the wire outlet groove, and the outer side of the wire outlet groove is provided with a sealing groove for mounting the second sealing element.

5. The motor cavity seal structure of claim 4, wherein, The second sealing element is cut along the arrangement direction of the three mounting through holes from one end of the second sealing element to the other end of the second sealing element to form a gap, and the gap penetrates through the three mounting through holes and does not penetrate through the other end of the second sealing element.

6. The motor cavity seal structure of claim 4, wherein, The second sealing ring is located directly above the second sealing element and is crimped on the second sealing element.

7. The motor cavity seal structure of claim 2, wherein, The outer cavity wall includes a main body portion, a transition portion, and the connecting portion, the main body portion is columnar, the transition portion is annular plate-shaped, the inner side end of the transition portion is connected with the main body portion, and the outer side end of the transition portion is connected with the connecting portion, the first annular cavity is formed between the main body portion and the inner cavity wall, the stator coil is arranged in the first annular cavity, the second annular cavity is formed between the connecting portion and the inner cavity wall, the circuit board is arranged in the second annular cavity, and the first annular cavity and the second annular cavity form the annular inner cavity.

8. The motor cavity seal structure of claim 7, wherein, The circuit board is annular and is arranged around the inner cavity wall, and the circuit board is electrically connected with the power line.

9. The motor cavity seal structure of claim 3, wherein, An outer edge of the connecting end portion is provided with a stop edge corresponding to the side surface of the cover body, and the cover body is embedded in the stop edge.

10. The motor cavity seal structure of claim 9, wherein, An outer side surface of the connecting portion is provided with a plurality of clamping protrusions for fixing the cover body, the cover body is provided with a plurality of buckling members corresponding to the clamping protrusions, the buckling members are provided with buckling openings, and the buckling members are located on the outer side of the connecting portion so that the clamping protrusions are clamped with the buckling openings.

Images