Injection molding stator and cross-flow fan applying same

Abstract

The utility model discloses an injection-molded stator and a cross-flow fan applying the same, comprising a stator core, an end insulator, a coil winding, an end plate and an injection-molded body, the end plate is provided with a plurality of terminal holes, the edge of each terminal hole is provided with a wire passing hole, and a wire passing groove is arranged between the edge of the end plate and the wire passing hole. The enameled lead of the coil winding penetrates through the wire passing groove and the wire passing hole to be connected with the end of the wiring terminal, the end of the wiring terminal extends out of the injection molding body, and the structural arrangement of the wire passing groove and the wire passing hole is added so that the enameled lead of the coil winding can be conveniently led to the end of the wiring terminal to be connected. The enameled lead of the coil winding does not need to be wound from the outer side or the inner side and then connected with the end of the wiring terminal, the structural arrangement is reasonable, the position where the enameled lead of the coil winding is connected with the wiring terminal is located on the outer surface, follow-up welding operation is facilitated, production efficiency is greatly improved, and manufacturing cost is reduced. And damage to other parts in the welding process can be reduced.

Description

Technical Field

[0001] The utility model relates to an injection molded stator and a cross-flow fan using the same. Background Art

[0002] A conventional injection molded stator includes a stator core, a coil winding, end insulation, and an injection molded housing. The injection molded housing integrally molds the stator core, the coil winding, and the end insulation. A cover plate is installed on one end insulation, and a plurality of slots for inserting connection terminals are provided on the end insulation. The end of the connection terminal passes through a through hole on the cover plate and extends out. A connection portion extends from the bottom of the connection terminal, and the enameled lead of the coil winding is wound around the connection portion and then welded. This structural arrangement has a small operating space, which makes it easy to damage other components during welding, and the operation is quite difficult. The formed solder joints are a very big problem, resulting in low production efficiency and high costs. Summary of the Invention

[0003] The purpose of the utility model is to provide an injection molded stator and a cross-flow fan using the same, so as to solve the technical problems in the prior art that the connection structure of the connection terminal welding has a small operating space, which makes it easy to damage other components during welding, the operation is quite difficult, the formed solder joints are a very big problem, the production efficiency is low, and the cost is high.

[0004] The technical solution of the utility model is realized as follows:

[0005] The utility model provides an injection molded stator, which includes a stator core, end insulation, a coil winding, an end plate, and an injection molded body. End insulation is installed on both end faces of the stator core and then the coil winding is wound. The end plate is installed on the end insulation on one end face of the stator core. Slots for inserting connection terminals are provided on the end insulation. The characteristics are as follows:

[0006] A plurality of terminal holes are provided on the end plate, and wire passing holes are provided at the edges of the terminal holes. The wire passing holes are communicated with the terminal holes. A wire passing groove is provided between the edge of the end plate and the wire passing hole, and the wire passing groove is communicated with the wire passing hole;

[0007] When the end plate is installed on the end insulation, the end of the connection terminal on the end insulation passes through the terminal hole and extends out. The enameled leads of the coil winding respectively pass through the wire passing groove, the wire passing hole and are connected with the end of the connection terminal. The injection molded body integrally encapsulates the stator core, the end insulation, the coil winding, and the end plate, and the end of the connection terminal extends out of the injection molded body.

[0008] Bosses are protruded at the edges of the terminal holes, the wire passing holes, and the wire passing grooves on the end plate. After removing part of the enamel of the enameled leads of the coil winding, the wire cores of the enameled leads are welded to the end faces of the bosses by soldering.

[0009] The above-mentioned boss is a trapezoidal boss.

[0010] A plurality of mounting buckles are provided on the end face of the end plate described above, and the end portions of the mounting buckles protrude from the injection molded body.

[0011] A central hole is provided in the middle of the injection molded body described above, and a bearing seat for mounting a bearing is provided in the central hole.

[0012] A plurality of mounting feet are provided on the outer edge of the injection molded body described above.

[0013] A cross-flow fan includes an outer rotor motor and a cross-flow impeller. The outer rotor motor includes a stator assembly and a rotor. The cross-flow impeller includes a front end plate, a rear end plate, and a plurality of blades disposed between the front end plate and the rear end plate. A first rotating shaft extends from the middle of the end face of the front end plate. The front end plate also protrudes a sleeve portion, and the sleeve portion is located around the first rotating shaft. The rotor is a magnetic ring, and the magnetic ring is encapsulated with the sleeve portion together. A receiving cavity is formed between the sleeve portion and the first rotating shaft. The stator assembly is embedded in the receiving cavity. The characteristic is that: the stator assembly is the injection molded stator described above.

[0014] An annular water baffle extends from the edge of the end face of the front end plate described above, and the annular water baffle is located outside the sleeve portion.

[0015] A central hole is provided in the middle of the injection molded body of the stator assembly described above, and a bearing seat for mounting a bearing is provided in the central hole. The first rotating shaft is connected to the bearing.

[0016] The above also includes a rear cover. A plurality of fixing holes are provided on the rear cover. A plurality of mounting buckles are provided on the end face of the end plate of the stator assembly. The end portions of the mounting buckles protrude from the injection molded body and are buckled together with the fixing holes of the rear cover.

[0017] Compared with the prior art, the present utility model has the following advantages:

[0018] 1. The utility model includes a stator core, end insulation, a coil winding, an end plate, and an injection molding body. End insulation is installed on both end faces of the stator core, and then the coil winding is wound. The end plate is installed on the end insulation on one end face of the stator core. Slots for inserting wiring terminals are provided on the end insulation. It is characterized in that: a number of terminal holes are provided on the end plate, wire passing holes are provided at the edges of the terminal holes, and the wire passing holes are communicated with the terminal holes. A wire passing groove is provided between the edge of the end plate and the wire passing holes, and the wire passing groove is communicated with the wire passing holes. When the end plate is installed on the end insulation, the ends of the wiring terminals on the end insulation pass through the terminal holes and extend out. The enameled leads of the coil winding respectively pass through the wire passing grooves and the wire passing holes and are connected to the ends of the wiring terminals. The injection molding body encapsulates the stator core, end insulation, coil winding, and end plate into one body, and the ends of the wiring terminals extend out of the injection molding body. The arrangement of the wire passing grooves and the wire passing holes is added to facilitate the connection of the enameled leads of the coil winding to the ends of the wiring terminals. Moreover, the enameled leads of the coil winding do not need to be wound from the outside or the inside and then connected to the ends of the wiring terminals. The structural arrangement is reasonable. The connection position of the enameled leads of the coil winding and the wiring terminals is located on the outer surface, which is convenient for subsequent welding operations, greatly improves production efficiency, reduces manufacturing costs, and can also reduce the damage to other components during the welding process.

[0019] 2. Other advantages of the utility model are described in detail in the embodiment part of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional view provided by Embodiment 1 of the utility model;

[0021] Figure 2 Another three-dimensional view provided by Embodiment 1 of the utility model;

[0022] Figure 3 An exploded view provided by Embodiment 1 of the utility model;

[0023] Figure 4 A partial structural schematic diagram provided by Embodiment 1 of the utility model;

[0024] Figure 5 A partial structural exploded view provided by Embodiment 1 of the utility model;

[0025] Figure 6 A three-dimensional view provided by Embodiment 2 of the utility model;

[0026] Figure 7 Another three-dimensional view provided by Embodiment 2 of the utility model;

[0027] Figure 8 A front view provided by Embodiment 2 of the utility model;

[0028] Figure 9 ForFigure 8 Cross-sectional view taken along A-A in the middle. Specific implementation manner

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1:

[0031] As Figures 1 to 5 shown, this embodiment provides an injection-molded stator, including a stator core 1, end insulation 2, a coil winding 3, an end plate 4, and an injection-molded body 5. End insulation 2 is installed on both end faces of the stator core 1 and then the coil winding 3 is wound. The end plate 4 is installed on the end insulation 2 on one end face of the stator core 1. A slot 21 for inserting a terminal 100 is provided on the end insulation 2. It is characterized in that:

[0032] A number of terminal holes 41 are provided on the end plate 4. A wire passing hole 42 is provided at the edge of the terminal hole 41. The wire passing hole 42 is communicated with the terminal hole 41. A wire passing groove 43 is provided between the edge of the end plate 4 and the wire passing hole 42. The wire passing groove 43 is communicated with the wire passing hole 42;

[0033] When the end plate 4 is installed on the end insulation 2, the end of the terminal 100 on the end insulation 2 passes through the terminal hole 41 and extends out. The enameled leads 31 of the coil winding 3 respectively pass through the wire passing groove 43 and the wire passing hole 42 and are connected to the end of the terminal 100. The injection-molded body 5 encapsulates the stator core 1, end insulation 2, coil winding 3, and end plate 4 into one body. The end of the terminal 100 extends out of the injection-molded body 5. The structural arrangement is reasonable. The position where the enameled lead of the coil winding is connected to the terminal is on the outer surface, which is convenient for subsequent welding operations, greatly improves production efficiency, reduces manufacturing costs, and can also reduce damage to other components during the welding process.

[0034] Bosses 44 protrude at the edges of the terminal holes 41, wire passing holes 42, and wire passing grooves 43 on the end plate 4. After removing part of the enamel from the enameled leads 31 of the coil winding 3, the wire cores of the enameled leads 31 are welded to the end faces of the bosses 44 using solder. This structural arrangement is reasonable and will not cause excessive solder to drip. The solder joints are more plump, and the connection between the enameled leads and the terminals is more secure and reliable. After soldering the terminals, there is no need to flatten the solder joints, thus simplifying the production steps and reducing labor costs.

[0035] The above-mentioned boss 44 is a trapezoidal boss.

[0036] On the end face of the above-mentioned end plate 4, a number of installation buckles 45 are provided. The ends of the installation buckles 45 protrude from the injection molded body 5, facilitating connection with the rear cover. The structural arrangement is reasonable and the installation is simple.

[0037] A central hole 50 is provided in the middle of the above-mentioned injection molded body 5, and a bearing seat 6 for installing a bearing 61 is provided in the central hole 50, facilitating connection with the rotating shaft. The structural arrangement is reasonable.

[0038] A number of installation feet 51 are provided on the outer edge of the above-mentioned injection molded body 5, facilitating installation and positioning.

[0039] Embodiment 2:

[0040] As shown in Fig. 1, Figures 6 to 9 a cross-flow fan includes an outer rotor motor and a cross-flow impeller 7. The outer rotor motor includes a stator assembly 10 and a rotor. The cross-flow impeller 7 includes a front end plate 71, a rear end plate 72, and a number of blades 73 disposed between the front end plate 71 and the rear end plate 72. A first rotating shaft 711 extends from the middle of the end face of the front end plate 71. The front end plate 71 also protrudes a sleeve portion 712. The sleeve portion 712 is located outside the first rotating shaft 711. The rotor is a magnetic ring, and the magnetic ring is plastic-sealed with the sleeve portion 712. A receiving cavity 713 is formed between the sleeve portion 712 and the first rotating shaft 711. The stator assembly 10 is embedded in the receiving cavity 713. It is characterized in that: the stator assembly 10 is the injection molded stator described in Embodiment 1.

[0041] An annular water blocking plate 714 extends from the edge of the end face of the above-mentioned front end plate 71. The annular water blocking plate 714 is located outside the sleeve portion 712. The structural arrangement is reasonable and the waterproof effect is good.

[0042] A central hole 50 is provided in the middle of the injection molded body 5 of the above-mentioned stator assembly 10. A bearing seat 6 for installing a bearing 61 is provided in the central hole 50, and the first rotating shaft 211 is connected to the bearing 61.

[0043] It further includes a rear cover 8. A number of fixing holes 81 are provided on the rear cover 8. A number of installation buckles 45 are provided on the end face of the end plate 4 of the stator assembly 10. The ends of the installation buckles 45 protrude from the injection molded body 5 and are buckled together with the fixing holes 81 of the rear cover 8. The installation structure is simple.

[0044] The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. An injection-molded stator, comprising a stator core (1), end insulation (2), a coil winding (3), an end plate (4), and an injection-molded body (5). End insulation (2) is mounted on both end faces of the stator core (1), and then the coil winding (3) is wound. The end plate (4) is mounted on the end insulation (2) on one end face of the stator core (1). A slot (21) for inserting a terminal (100) is provided on the end insulation (2). It is characterized in that: A number of terminal holes (41) are provided on the end plate (4). A wire passing hole (42) is provided at the edge of the terminal hole (41). The wire passing hole (42) is communicated with the terminal hole (41). A wire passing groove (43) is provided between the edge of the end plate (4) and the wire passing hole (42). The wire passing groove (43) is communicated with the wire passing hole (42); When the end plate (4) is mounted on the end insulation (2), the end of the terminal (100) on the end insulation (2) passes through the terminal hole (41) and extends out. The enameled leads (31) of the coil winding (3) respectively pass through the wire passing groove (43) and the wire passing hole (42) and are connected to the end of the terminal (100). The injection-molded body (5) seals the stator core (1), end insulation (2), coil winding (3), and end plate (4) into one body, and the end of the terminal (100) extends out of the injection-molded body (5).

2. The injection-molded stator according to claim 1, characterized in that: A boss (44) protrudes at the edge of the terminal hole (41), wire passing hole (42), and wire passing groove (43) of the end plate (4). After removing part of the enamel of the enameled lead (31) of the coil winding (3), the core of the enameled lead (31) is welded to the end face of the boss (44) by soldering.

3. An injection-molded stator according to claim 2, characterized in that: The boss (44) is a trapezoidal boss.

4. An injection-molded stator according to claim 1 or 2 or 3, characterized in that: A number of mounting buckles (45) are provided on the end face of the end plate (4). The ends of the mounting buckles (45) extend out of the injection-molded body (5).

5. The injection-molded stator according to claim 4, wherein: A central hole (50) is provided in the middle of the injection-molded body (5). A bearing seat (6) for mounting a bearing (61) is provided in the central hole (50).

6. The injection-molded stator according to claim 4, wherein: A number of mounting feet (51) are provided on the outer edge of the injection-molded body (5).

7. A cross-flow fan, comprising an external rotor motor and a cross-flow impeller (7). The external rotor motor includes a stator assembly (10) and a rotor. The cross-flow impeller (7) includes a front end plate (71), a rear end plate (72), and a plurality of blades (73) disposed between the front end plate (71) and the rear end plate (72). A first rotating shaft (711) extends from the middle of the end face of the front end plate (71). The front end plate (71) further protrudes with a sleeve portion (712). The sleeve portion (712) is located outside the first rotating shaft (711). The rotor is a magnetic ring, and the magnetic ring is injection-molded together with the sleeve portion (712). A receiving cavity (713) is formed between the sleeve portion (712) and the first rotating shaft (711). The stator assembly (10) is embedded in the receiving cavity (713). It is characterized in that: The stator assembly (10) is the injection-molded stator according to any one of claims 1 to 6.

8. The cross-flow fan according to claim 7, wherein: An annular water baffle (714) extends from the edge of the end face of the front end plate (71). The annular water baffle (714) is located outside the sleeve part (712).

9. The cross-flow fan according to claim 7, characterized in that: A central hole (50) is provided in the middle of the injection-molded body (5) of the stator assembly (10). A bearing seat (6) for mounting a bearing (61) is provided in the central hole (50). The first rotating shaft (711) is connected to the bearing (61).

10. A cross-flow fan according to claim 7, characterized in that: It further includes a rear cover (8). A number of fixing holes (81) are provided on the rear cover (8). A number of mounting buckles (45) are provided on the end face of the end plate (4) of the stator assembly (10). The ends of the mounting buckles (45) extend out of the injection-molded body (5) and are buckled together with the fixing holes (81) of the rear cover (8).

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