Plastic-encapsulated outer rotor motor

Abstract

The utility model discloses a plastic package outer rotor motor, including pivot, plastic package stator subassembly, outer rotor subassembly, oil bearing subassembly and end cover, outer rotor subassembly includes rotor shell and installs permanent magnet on the rotor shell inner wall, and the pivot is installed on the rotor shell, plastic package stator subassembly includes stator core, coil winding and plastic package body, and the plastic package body is integrated to stator core and coil winding and forms bearing mounting hole in the middle, and oil bearing subassembly is installed in the bearing mounting hole inside, the middle of end cover is provided with the mounting groove, and the outer convex ring and inner convex ring are protruding in the middle of mounting groove, and the outer convex ring is located the outside of inner convex ring, and the oil tank of storage lubricating oil is formed between the outer convex ring and inner convex ring, and the bottom of plastic package stator subassembly is nested in the mounting groove, and the outer convex ring and inner convex ring embed the bottom of bearing mounting hole, it simple structure, the manufacturing cost is low, and the noise is low, and the installation is simple.

Description

Technical Field

[0001] This utility model relates to a plastic-encapsulated external rotor motor. Background Technology

[0002] Existing encapsulated external rotor motors generally include a shaft, an encapsulated stator assembly, an external rotor assembly, and a bearing assembly. The bearings are ball bearings, as described in Japanese Patent JP2001197698A. The structure of ball bearings requires two, which is complex, noisy, and has high manufacturing costs. Summary of the Invention

[0003] The purpose of this invention is to provide a plastic-encapsulated external rotor motor that solves the technical problems of existing plastic-encapsulated external rotor motors not using sliding bearings, resulting in complex structures, high noise, and high manufacturing costs.

[0004] The technical solution of this utility model is implemented as follows:

[0005] A plastic-encapsulated external rotor motor includes a shaft, a plastic-encapsulated stator assembly, an external rotor assembly, an oil-impregnated bearing assembly, and an end cover, wherein:

[0006] The outer rotor assembly includes a rotor housing and permanent magnets mounted on the inner wall of the rotor housing, with the shaft mounted on the rotor housing;

[0007] The encapsulated stator assembly includes a stator core, a coil winding wound on the stator core, and an encapsulation body. The encapsulation body encapsulates the stator core and the coil winding into one piece and forms a bearing mounting hole in the middle. The oil-impregnated bearing assembly is installed in the bearing mounting hole.

[0008] The feature is that: an installation groove is provided in the middle of the end cover, and an outer convex ring and an inner convex ring protrude from the middle of the installation groove. The outer convex ring is located outside the inner convex ring, and an oil reservoir for storing lubricating oil is formed between the outer convex ring and the inner convex ring. The bottom of the plastic-encapsulated stator assembly is nested in the installation groove, and the outer convex ring and the inner convex ring are embedded in the bottom of the bearing mounting hole.

[0009] Preferably, the edge of the end cap has several protruding buckles, and the bottom edge of the plastic seal has several recessed steps, with the top of the buckles engaging with the recessed steps.

[0010] Preferably, mounting bosses are provided at the four corners of the end cap, and mounting holes are provided on the mounting bosses.

[0011] Preferably, the end cap has a square cross-sectional shape.

[0012] Preferably, a lead wire clearance opening is provided at the edge of the end cap, and the lead wire protrusion on the plastic seal passes through the lead wire clearance opening.

[0013] Preferably, the encapsulated stator assembly further includes a circuit board located at the bottom of the stator core. The encapsulation body encapsulates the stator core, coil windings, and circuit board into a single unit, and the bottom cross-section of the encapsulation body is large enough to accommodate the circuit board.

[0014] Preferably, the mounting groove is circular in shape.

[0015] Preferably, the oil-impregnated bearing assembly includes a bushing, an oil felt, and an oil-impregnated bearing. The bottom of the rotating shaft is fitted inside the oil-impregnated bearing, the oil-impregnated bearing is fitted inside the bushing, the bushing is fitted into the bearing mounting hole, and the oil felt is wrapped around the bottom of the oil-impregnated bearing and located between the bushing and the oil-impregnated bearing.

[0016] Preferably, a metal washer and a plastic washer are provided under the roofing felt.

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

[0018] 1. The encapsulated stator assembly of this utility model includes a stator core, a coil winding wound on the stator core, and an encapsulation body. The encapsulation body encapsulates the stator core and the coil winding into one piece and forms a bearing mounting hole in the middle. An oil-impregnated bearing assembly is installed in the bearing mounting hole. An installation groove is provided in the middle of the end cover. An outer convex ring and an inner convex ring protrude from the middle of the installation groove. The outer convex ring is located outside the inner convex ring. An oil reservoir for storing lubricating oil is formed between the outer convex ring and the inner convex ring. The bottom of the encapsulated stator assembly is nested in the installation groove, and the outer convex ring and the inner convex ring are embedded in the bottom of the bearing mounting hole. Its structure is simple, its layout is reasonable, its installation is convenient, its noise is low, and its manufacturing cost is low.

[0019] 2. The outer and inner convex rings of the end cap are embedded in the bottom of the bearing mounting hole, providing good sealing and dust and water resistance;

[0020] 3. The end cover can serve as a mounting base for the motor and also as a component for sealing the bearing mounting holes, making its functions more complete.

[0021] 4. Other advantages of this utility model are described in detail in the embodiment section of the specification. Attached Figure Description

[0022] Figure 1 A perspective view provided for this utility model;

[0023] Figure 2 Another perspective view provided for this utility model;

[0024] Figure 3 An exploded view provided for this utility model;

[0025] Figure 4 Another exploded view provided for this utility model;

[0026] Figure 5A perspective view of the end cap provided by this utility model;

[0027] Figure 6 This is a bottom view of the present invention;

[0028] Figure 7 for Figure 6 AA sectional view. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Example 1:

[0031] like Figures 1 to 7 As shown, this embodiment provides a plastic-encapsulated external rotor motor, including a shaft 1, a plastic-encapsulated stator assembly 2, an external rotor assembly 3, an oil-impregnated bearing assembly 4, and an end cover 5, wherein:

[0032] The outer rotor assembly 3 includes a rotor housing 31 and a permanent magnet 32 ​​mounted on the inner wall of the rotor housing 31, and the rotating shaft 1 is mounted on the rotor housing 31;

[0033] The encapsulated stator assembly 2 includes a stator core 21, a coil winding 22 wound on the stator core 21, and an encapsulation body 23. The encapsulation body 23 encapsulates the stator core 21 and the coil winding 22 into one piece and forms a bearing mounting hole 24 in the middle. The oil-impregnated bearing assembly 4 is installed in the bearing mounting hole 24.

[0034] The feature is that: the end cover 5 is provided with a mounting groove 51 in the middle, and an outer protruding ring 52 and an inner protruding ring 53 protrude from the middle of the mounting groove 51. The outer protruding ring 52 is located outside the inner protruding ring 53, and an oil storage groove 54 for storing lubricating oil is formed between the outer protruding ring 52 and the inner protruding ring 53. The bottom of the plastic-encapsulated stator assembly 2 is nested in the mounting groove 51, and the outer protruding ring 52 and the inner protruding ring 53 are embedded in the bottom of the bearing mounting hole 24.

[0035] This utility model uses an oil-impregnated bearing assembly to replace the ball bearing, and has a simple structure, reasonable layout, convenient installation, low noise, and low manufacturing cost; the outer and inner convex rings of the end cover are embedded in the bottom of the bearing mounting hole, which has good sealing performance and good dust and water resistance; the end cover can be used as a mounting base for the motor and as a component for sealing the bearing mounting hole, making its function more complete.

[0036] Preferably, the edge of the end cover 5 has several protruding buckles 55, and the bottom edge of the plastic seal 23 has several recessed steps 231. The top of the buckles 55 is locked on the recessed steps 231, making installation simple and the motor and the end cover 5 form a whole.

[0037] Preferably, mounting bosses 56 are provided at the four corners of the end cover 5, and mounting holes 561 are provided on the mounting bosses 56 to facilitate installation and connection with the load.

[0038] Preferably, the end cap 5 has a square cross-sectional shape, which is simple in structure.

[0039] Preferably, a lead wire avoidance opening 57 is provided at the edge of the end cap 5, and the lead wire protrusion 232 on the plastic seal 23 passes through the lead wire avoidance opening 57, which facilitates installation and wiring.

[0040] Preferably, the encapsulated stator assembly 2 further includes a circuit board 25, which is located at the bottom of the stator core 21. The encapsulation body 23 encapsulates the stator core 21, the coil winding 22 and the circuit board 25 into one unit, and the bottom cross section of the encapsulation body 23 is large to accommodate the circuit board 25, which is a reasonable structure.

[0041] Preferably, the mounting slot 51 is circular in shape to facilitate assembly with the motor.

[0042] Preferably, the oil-impregnated bearing assembly 4 includes a bushing 41, an oil felt 42, and an oil-impregnated bearing 43. The bottom of the rotating shaft 1 is fitted inside the oil-impregnated bearing 43, the oil-impregnated bearing 43 is fitted inside the bushing 41, the bushing 41 is fitted inside the bearing mounting hole 24, and the oil felt 42 is wrapped around the bottom of the oil-impregnated bearing 43 and located between the bushing 41 and the oil-impregnated bearing 43. The structure is simple and the layout is reasonable. When the motor is working, the lubricating oil in the oil reservoir 54 is absorbed by the oil felt 42 and replenished into the oil-impregnated bearing 43.

[0043] Preferably, a metal washer 44 and a plastic washer 45 are provided below the asphalt felt 42 to support the asphalt felt 42.

[0044] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. A plastic-encapsulated external rotor motor, comprising a shaft (1), a plastic-encapsulated stator assembly (2), an external rotor assembly (3), an oil-impregnated bearing assembly (4), and an end cover (5), wherein: The outer rotor assembly (3) includes a rotor housing (31) and a permanent magnet (32) mounted on the inner wall of the rotor housing (31), and a rotating shaft (1) is mounted on the rotor housing (31); The encapsulated stator assembly (2) includes a stator core (21), a coil winding (22) wound on the stator core (21), and an encapsulation body (23). The encapsulation body (23) encapsulates the stator core (21) and the coil winding (22) into one piece and forms a bearing mounting hole (24) in the middle. The oil-impregnated bearing assembly (4) is installed in the bearing mounting hole (24). The feature is that: the end cover (5) is provided with a mounting groove (51) in the middle, and an outer protruding ring (52) and an inner protruding ring (53) protrude in the middle of the mounting groove (51). The outer protruding ring (52) is located outside the inner protruding ring (53), and an oil reservoir (54) for storing lubricating oil is formed between the outer protruding ring (52) and the inner protruding ring (53). The bottom of the plastic-encapsulated stator assembly (2) is nested in the mounting groove (51), and the outer protruding ring (52) and the inner protruding ring (53) are embedded in the bottom of the bearing mounting hole (24).

2. The encapsulated external rotor motor according to claim 1, characterized in that: The edge of the end cap (5) has several buckles (55) protruding out, and the bottom edge of the plastic seal (23) has several recessed steps (231), with the top of the buckles (55) locking onto the recessed steps (231).

3. A plastic-encapsulated external rotor motor according to claim 1 or 2, characterized in that: Mounting bosses (56) are provided at the four corners of the end cap (5), and mounting holes (561) are provided on the mounting bosses (56).

4. A plastic-encapsulated external rotor motor according to claim 3, characterized in that: The end cap (5) has a square cross-section.

5. A plastic-encapsulated external rotor motor according to claim 3, characterized in that: A lead wire clearance opening (57) is provided at the edge of the end cap (5), and the lead wire protrusion (232) on the plastic seal (23) passes through the lead wire clearance opening (57).

6. A plastic-encapsulated external rotor motor according to claim 5, characterized in that: The encapsulated stator assembly (2) also includes a circuit board (25), which is located at the bottom of the stator core (21). The encapsulation body (23) encapsulates the stator core (21), coil winding (22) and circuit board (25) into one unit, and the bottom cross section of the encapsulation body (23) is large enough to accommodate the circuit board (25).

7. A plastic-encapsulated external rotor motor according to claim 3, characterized in that: The mounting slot (51) is circular in shape.

8. A plastic-encapsulated external rotor motor according to claim 5, characterized in that: The oil-impregnated bearing assembly (4) includes a bushing (41), an oil felt (42), and an oil-impregnated bearing (43). The bottom of the rotating shaft (1) is fitted inside the oil-impregnated bearing (43), the oil-impregnated bearing (43) is fitted inside the bushing (41), the bushing (41) is fitted inside the bearing mounting hole (24), and the oil felt (42) is wrapped around the bottom of the oil-impregnated bearing (43) and located between the bushing (41) and the oil-impregnated bearing (43).

9. A plastic-encapsulated external rotor motor according to claim 8, characterized in that: A metal washer (44) and a plastic washer (45) are provided under the tar paper (42).

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