External rotor motor

Abstract

The utility model discloses an external rotor motor, which comprises a motor and a controller, the motor comprises a rotating shaft, a stator assembly, an external rotor and a sleeve seat, a plurality of wiring terminals are arranged on an end part insulator, the wiring terminals are electrically connected with a coil winding, and a control box is arranged on the bottom surface of a bottom plate. The end portion of the wiring terminal extends out of a terminal hole of the bottom plate to be electrically connected with a circuit board of the controller, the outer side edge of the bottom face of the bottom plate extends downwards to form a first sleeve shell, the control box is installed at the bottom of the first sleeve shell, a sealing groove is formed in the end face of the bottom of the first sleeve shell, and a special-shaped sealing ring is installed in the sealing groove. The special-shaped sealing ring comprises a ring body and a plurality of convex parts arranged on the outer surface of the ring body, when the control box and the first sleeve shell are installed, the convex parts of the special-shaped sealing ring are extruded to deform, the direction problem does not need to be considered in the assembling process of the special-shaped sealing ring, and the special-shaped sealing ring can avoid the problem of sealing failure caused by machining eccentricity of a sealing groove. The sealing effect is good.

Description

Technical Field

[0001] This utility model relates to an external rotor motor. Background Technology

[0002] Existing external rotor motors include a motor and a controller. The controller includes a control box and a circuit board. The motor includes a shaft, a stator assembly, an external rotor, and a sleeve base. The stator assembly includes a stator core, end insulation, and coil windings. Several terminals are installed on the end insulation, and these terminals are electrically connected to the coil windings. The sleeve base includes a base plate and a sleeve protruding upwards from the middle of the base plate. Bearing chambers are located at both ends of the sleeve. The control box is mounted on the bottom surface of the base plate, which has several terminal holes. The ends of the terminals extend from these holes and are electrically connected to the controller's circuit board. The external rotor is fitted over the stator assembly, and a sealing ring is provided between the control box and the base plate. Existing sealing rings have a relatively simple structure, generally with a circular cross-section. Their design is unreasonable, only achieving single-level surface pressure, resulting in poor sealing performance. They are only suitable for sealing simple components and are ineffective for sealing chain drives, especially for sealing gaps in sleeve-type applications, failing to meet product requirements. Summary of the Invention

[0003] The purpose of this utility model is to provide an external rotor motor that solves the technical problems of existing sealing rings, which are generally simple in structure, circular, and have unreasonable structural design. They can only achieve single-level surface pressure, have poor continuous sealing effect, and are only suitable for sealing simple parts. They are not suitable for sealing in the field of chain drives, especially for sealing gaps in sleeves, and cannot meet the technical requirements of products.

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

[0005] This utility model provides an external rotor motor, including a motor and a controller, wherein: the controller includes a control box and a circuit board; the motor includes a rotating shaft, a stator assembly, an external rotor, and a sleeve base; the stator assembly includes a stator core, end insulation, and coil windings; several terminals are installed on the end insulation, and the terminals are electrically connected to the coil windings; the sleeve base includes a base plate and a sleeve protruding upward from the middle of the base plate; bearing chambers are provided at both ends of the sleeve; the control box is installed on the bottom surface of the base plate; several terminal holes are provided on the base plate; the ends of the terminals extend from the terminal holes of the base plate and are electrically connected to the circuit board of the controller; the external rotor is sleeved outside the stator assembly; the characteristic feature is that: a first sleeve shell extends downward from the outer edge of the bottom surface of the base plate; the control box is installed at the bottom of the first sleeve shell; a sealing groove is provided on the bottom end face of the first sleeve shell; a shaped sealing ring is installed in the sealing groove; the shaped sealing ring includes a ring body and several protrusions provided on the outer surface of the ring body; when the control box is installed with the first sleeve shell, the protrusions of the shaped sealing ring are deformed by compression.

[0006] The aforementioned protrusions number four in total, and are arranged symmetrically in pairs on the outer surface of the ring.

[0007] The above-mentioned components also include several terminal pads, which correspond to several terminal holes. The terminal pads are located at the edge of the terminal holes and have grooves on the bottom surface of the base plate. Each terminal pad includes a pad and a boss protruding from one end face of the pad. The terminal pad has a through hole in the middle, which passes through the pad and the boss. When the terminal pad is installed on the base plate, the pad is embedded in the groove, the boss is embedded in the terminal hole, and the terminal extends through the through hole to be electrically connected to the circuit board of the controller.

[0008] The outer diameter of the aforementioned through hole is larger than the outer diameter of the terminal block.

[0009] The bottom surface of the aforementioned base plate protrudes an annular flange around the opening of the bearing chamber. The first sleeve housing, the base plate, and the annular flange form a receiving groove. Several terminal holes on the base plate are located between the first sleeve housing and the annular flange. The circuit board is installed in the receiving groove, and potting compound for encapsulating the circuit board is injected into the receiving groove.

[0010] The outer surface of the first sleeve shell and the top surface of the base plate are provided with several heat dissipation ribs.

[0011] The first sleeve outer shell described above is provided with a wire outlet hole, and a locking device is installed on the wire outlet hole.

[0012] The circuit board described above integrates several capacitors, and the control box is equipped with several anti-interference devices.

[0013] A clearance groove to prevent installation interference with capacitor components.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] 1. This utility model provides an external rotor motor, including a motor and a controller, wherein: the controller includes a control box and a circuit board; the motor includes a rotating shaft, a stator assembly, an external rotor, and a sleeve base; the stator assembly includes a stator core, end insulation, and coil windings; several terminals are installed on the end insulation, and the terminals are electrically connected to the coil windings; the sleeve base includes a base plate and a sleeve protruding upwards from the middle of the base plate; bearing chambers are provided at both ends of the sleeve; the control box is installed on the bottom surface of the base plate; several terminal holes are provided on the base plate; the ends of the terminals extend from the terminal holes of the base plate and are electrically connected to the circuit board of the controller. The connection is such that the outer rotor is sleeved outside the stator assembly; the characteristic is that: the outer edge of the bottom surface of the base plate extends downward to form a first sleeve shell, the control box is installed at the bottom of the first sleeve shell, a sealing groove is provided on the bottom end face of the first sleeve shell, and a special-shaped sealing ring is installed in the sealing groove. The special-shaped sealing ring includes a ring body and several protrusions provided on the outer surface of the ring body. When the control box is installed with the first sleeve shell, the protrusions of the special-shaped sealing ring are squeezed and deformed. The special-shaped sealing ring does not need to consider the orientation problem during the assembly process. The special-shaped sealing ring can avoid the sealing failure problem caused by the eccentricity of the sealing groove, and the sealing effect is good.

[0016] 2. Other advantages of this utility model are described in detail in the embodiment section of the specification. Attached Figure Description

[0017] Figure 1 A perspective view provided for this utility model;

[0018] Figure 2 Exploded view provided for this utility model;

[0019] Figure 3 Partial exploded view provided for this utility model;

[0020] Figure 4 Top view provided for this utility model;

[0021] Figure 5 for Figure 4 Sectional view of AA;

[0022] Figure 6 for Figure 5 A magnified view of part B in the image;

[0023] Figure 7 for Figure 5 A magnified view of part C. Detailed Implementation

[0024] 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. Embodiment 1:

[0025] As Figures 1 to 7 shown, this embodiment provides an outer rotor motor, including a motor 100 and a controller 200, where: The controller 200 includes a control box 201 and a circuit board 202; The motor 100 includes a rotating shaft 1, a stator assembly 2, an outer rotor 3, and a sleeve seat 4. The stator assembly 2 includes a stator core 21, end insulation 22, and a coil winding 23. A plurality of wiring terminals 24 are installed on the end insulation 22, and the wiring terminals 24 are electrically connected to the coil winding 23. The sleeve seat 4 includes a bottom plate 41 and a sleeve 42 protruding upward from the middle of the bottom plate 41. Bearing chambers 421 are provided at both ends of the sleeve 42. The control box 201 is installed on the bottom surface of the bottom plate 41. A plurality of terminal holes 411 are provided on the bottom plate 41. The ends of the wiring terminals 24 extend out from the terminal holes 411 of the bottom plate 41 and are electrically connected to the circuit board 202 of the controller 200. The outer rotor 3 is sleeved outside the stator assembly 2; The feature is that: A first sleeve housing 412 extends downward from the outer edge of the bottom surface of the bottom plate 41. The control box 201 is installed at the bottom of the first sleeve housing 412. A sealing groove 413 is provided on the bottom end surface of the first sleeve housing 412. A special-shaped sealing ring 414 is installed in the sealing groove 413. The special-shaped sealing ring 414 includes a ring body 414a and a plurality of convex portions 414b provided on the outer surface of the ring body 414a. When the control box 201 and the first sleeve housing 412 are installed, the convex portions 414b of the special-shaped sealing ring 414 are squeezed and deformed. The special-shaped sealing ring does not need to consider the direction problem during the assembly process. The special-shaped sealing ring can avoid the problem of sealing failure caused by the processing eccentricity of the sealing groove, and has a good sealing effect.

[0026] The number of the above-mentioned plurality of convex portions 414b is 4, and they are arranged symmetrically in pairs on the outer surface of the ring body 414a. The cross-section of the special-shaped sealing ring is "convex". After the sealing cover is installed, the controller is end-sealed. The sealing is mainly done by the protruding position of the special-shaped sealing ring, which can avoid the problem of sealing failure caused by the processing eccentricity of the conventional sealing groove.

[0027] The above also includes several connector pads 5, which correspond to several terminal holes 411. A groove 410 is provided on the bottom surface of the base plate 41 at the edge of the terminal hole 411. Each connector pad 5 includes a pad 51 and a boss 52 protruding from one end face of the pad 51. A through hole 50 is provided in the middle of the connector pad 5, passing through the pad 51 and the boss 52. When the connector pad 5 is installed on the base plate, the pad 51 is embedded in the groove, and the boss 52 is embedded in the terminal hole 411. The terminal 24 extends through the through hole 50 and is electrically connected to the circuit board 202 of the controller 200. Since the circuit board needs to be inserted onto multiple connectors simultaneously during assembly, the positional accuracy of the terminals is critical. Connector pads are needed to fix the position of the terminals for easy installation. With the help of sealant, the gaps between the connector pads, sleeve seats, and terminals can be filled to achieve a sealing effect.

[0028] The outer diameter of the through hole 50 is larger than the outer diameter of the terminal 24, forming a clearance fit and a reasonable structural arrangement.

[0029] The bottom surface of the aforementioned base plate 41 protrudes an annular flange 415 around the opening 4210 of the bearing chamber 421. The first sleeve housing 412, the base plate 41, and the annular flange 415 form a receiving groove 416. Several terminal holes 411 on the base plate 41 are located between the first sleeve housing 412 and the annular flange 415. The circuit board 202 is installed in the receiving groove 416, and the receiving groove 416 is filled with potting compound for encapsulating the circuit board 202. This structure is reasonably arranged and simple. By adding the receiving groove, the circuit board can not only be moisture-proof and waterproof, but also effectively prevent collisions and meet the protection needs of customers.

[0030] A number of heat dissipation ribs 417 are provided between the outer surface of the first sleeve shell 412 and the top surface of the base plate 41 to improve the heat dissipation effect.

[0031] The first sleeve outer shell 412 is provided with a wire outlet hole 412a, and a locking device 412b is installed on the wire outlet hole 412a. The structure is reasonably arranged and it is convenient to fix the lead wire.

[0032] The circuit board 202 mentioned above integrates several capacitors 202a, and the control box 201 is equipped with several

[0033] The clearance groove 201a, which prevents installation interference with the capacitor component 202a, has a reasonable structural arrangement.

[0034] 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. An external rotor motor, comprising a motor (100) and a controller (200), wherein: The controller (200) includes a control box (201) and a circuit board (202); The motor (100) includes a rotating shaft (1), a stator assembly (2), an outer rotor (3), and a sleeve base (4). The stator assembly (2) includes a stator core (21), end insulation (22), and coil windings (23). Several terminals (24) are installed on the end insulation (22), and the terminals (24) are electrically connected to the coil windings (23). The sleeve base (4) includes a base plate (41) and a sleeve (42) protruding upward from the middle of the base plate (41). Bearing chambers (421) are provided at both ends of the sleeve (42). The control box (201) is installed on the bottom surface of the base plate (41). Several terminal holes (411) are provided on the base plate (41). The ends of the terminals (24) extend from the terminal holes (411) of the base plate (41) and are electrically connected to the circuit board (202) of the controller (200). The outer rotor (3) is sleeved outside the stator assembly (2). The characteristic of the motor is that: The bottom outer edge of the base plate (41) extends downward to form the first sleeve shell (412). The control box (201) is installed at the bottom of the first sleeve shell (412). A sealing groove (413) is provided on the bottom end face of the first sleeve shell (412). A special-shaped sealing ring (414) is installed in the sealing groove (413). The special-shaped sealing ring (414) includes a ring body (414a) and several protrusions (414b) provided on the outer surface of the ring body (414a). When the control box (201) is installed with the first sleeve shell (412), the protrusions (414b) of the special-shaped sealing ring (414) are squeezed and deformed.

2. An external rotor motor according to claim 1, characterized in that: There are four protrusions (414b), which are arranged symmetrically in pairs on the outer surface of the ring (414a).

3. An external rotor motor according to claim 1 or 2, characterized in that: It also includes several connector pads (5), several connector pads (5) correspond to several terminal holes (411), located at the edge of the terminal hole (411) and provided with a groove (410) on the bottom surface of the base plate (41), the connector pad (5) includes a pad (51) and a boss (52) protruding from one end face of the pad (51), the connector pad (5) is provided with a through hole (50) in the middle, the through hole (50) passes through the pad (51) and the boss (52), when the connector pad (5) is installed on the base plate, the pad (51) of the connector pad (5) is embedded in the groove, the boss (52) is embedded in the terminal hole (411), and the terminal (24) extends through the through hole (50) and is electrically connected to the circuit board (202) of the controller (200).

4. An external rotor motor according to claim 3, characterized in that: The outer diameter of the through hole (50) is larger than the outer diameter of the terminal block (24).

5. An external rotor motor according to claim 3, characterized in that: The bottom surface of the base plate (41) protrudes an annular flange (415) around the opening (4210) of the bearing chamber (421). The first sleeve shell (412), the base plate (41) and the annular flange (415) form a receiving groove (416). Several terminal holes (411) on the base plate (41) are located between the first sleeve shell (412) and the annular flange (415). The circuit board (202) is installed in the receiving groove (416). The receiving groove (416) is filled with potting compound for encapsulating the circuit board (202).

6. An external rotor motor according to claim 5, characterized in that: Several heat dissipation ribs (417) are provided between the outer surface of the first sleeve shell (412) and the top surface of the base plate (41).

7. An external rotor motor according to claim 6, characterized in that: The first sleeve outer shell (412) is provided with a wire outlet hole (412a), and a locking device (412b) is installed on the wire outlet hole (412a).

8. An external rotor motor according to claim 5, characterized in that: The circuit board (202) integrates several capacitor components (202a), and the control box (201) is provided with several anti-capacitor devices. The device (202a) has an installation interference relief slot (201a).

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