External rotor motor

Abstract

The utility model discloses an external rotor motor, which comprises a rotating shaft, a stator assembly, an external rotor and a sleeve seat, a sealing gasket is arranged on the bottom surface of a bottom plate and covers terminal holes, a plurality of bosses corresponding to the terminal holes protrude on the top surface of the sealing gasket, a through hole is arranged in the middle of each boss, and an annular step is arranged on the inner wall surface of each through hole and close to the top of each boss. A center hole is formed in the middle of the annular step, a first rubber layer and a second rubber layer are arranged on the top face and the bottom face of the annular step in an injection molding mode respectively, and a third rubber layer used for covering the center hole is arranged on the bottom face of the second rubber layer. When the sealing gasket is installed on the bottom face of the bottom plate, the boss of the sealing gasket extends into the terminal hole, meanwhile, the end of the wiring terminal extends into the through hole in the boss and the center hole and pierces the third rubber layer to extend out of the sealing gasket, the sealing gasket and the bottom plate are matched to achieve the sealing effect, and the sealing of the wiring terminal is guaranteed in a rubber piercing mode. And the sealing performance of the whole structure is optimized.

Description

Technical Field

[0001] The utility model relates to an outer rotor motor. Background Art

[0002] The existing outer rotor motor includes a rotating shaft, a stator assembly, an outer rotor and a sleeve seat. The stator assembly includes a stator core, an end insulation and a coil winding. A plurality of wiring terminals are installed on the end insulation. The wiring terminals are electrically connected to the coil winding. The sleeve seat includes a base plate and a sleeve protruding upward from the middle of the base plate. The shell is installed on the bottom surface of the base plate. A plurality of terminal holes are provided on the base plate. The ends of the wiring terminals extend from the terminal holes of the base plate to be electrically connected to the circuit board of the controller. The outer rotor is sleeved on the outside of the stator assembly. A groove is dug out on the bottom surface of the base plate. A plurality of terminal holes are located in the groove. A sealing gasket is installed in the groove. A through hole is provided on the sealing gasket for the conductive sheet to pass through. The through hole and the conductive sheet are not tightly matched, resulting in a poor sealing effect at the conductive sheet. Summary of the invention

[0003] The utility model aims to provide an outer rotor motor, which solves the technical problem in the prior art that a through hole is provided on the sealing gasket for the conductive sheet to pass through, and the through hole and the conductive sheet are not tightly matched, resulting in poor sealing effect at the conductive sheet.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The utility model provides an outer rotor motor, comprising a rotating shaft, a stator assembly, an outer rotor and a sleeve seat, wherein the stator assembly comprises a stator core, an end insulation and a coil winding, a plurality of wiring terminals are mounted on the end insulation, the wiring terminals are electrically connected to the coil winding, the sleeve seat comprises a bottom plate and a sleeve protruding upward from the middle of the bottom plate, a plurality of terminal holes are arranged on the bottom plate, the ends of the wiring terminals extend from the terminal holes of the bottom plate and are electrically connected to the circuit board of the controller, the outer rotor is sleeved outside the stator assembly, a sealing pad is mounted on the bottom surface of the bottom plate and covers the terminal holes, and the utility model is characterized in that:

[0006] A plurality of bosses corresponding to the terminal holes protrude from the top surface of the sealing gasket, a through hole is provided in the middle of the boss, the through hole penetrates the boss and the sealing gasket, an annular step is provided on the inner wall surface of the through hole and near the top of the boss, a center hole is formed in the middle of the annular step, a first rubber layer and a second rubber layer are respectively injection-molded on the top and bottom surfaces of the annular step, and a third rubber layer for covering the center hole is provided on the bottom surface of the second rubber layer;

[0007] When the sealing pad is installed on the bottom surface of the base plate, the boss of the sealing pad extends into the terminal hole, and the end of the terminal extends into the through hole and the center hole in the boss and pierces the third rubber layer to extend out of the sealing pad.

[0008] The thickness of the third rubber layer is 0.2 mm.

[0009] The sealing gasket described above is made of plastic.

[0010] The inlet of the first rubber layer is provided with a guide angle.

[0011] A sealing groove is provided on the bottom surface of the above-mentioned base plate, and a plurality of terminal holes are located in the sealing groove. A fourth rubber layer is provided on the top surface of the sealing gasket and around the edge of the plurality of bosses. The height of the fourth rubber layer is higher than the height of the sealing groove. When the sealing gasket is installed on the bottom surface of the base plate, the fourth rubber layer is installed in the sealing groove and the fourth rubber layer is squeezed to achieve sealing.

[0012] The bottom surface of the base plate is also provided with a plurality of first mounting holes, and the sealing gasket is provided with a plurality of second mounting holes. The plurality of first mounting holes correspond to the plurality of second mounting holes one by one, and are connected and locked with the first mounting holes by screws passing through the second mounting holes.

[0013] The second mounting hole mentioned above is a U-shaped hole.

[0014] The above also includes a controller, which includes a shell and a circuit board installed in the shell. The shell is installed on the bottom surface of the base plate, and the wiring terminals extend from the sealing pad and are electrically connected to the circuit board of the controller.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The utility model includes a rotating shaft, a stator assembly, an outer rotor and a sleeve seat. The stator assembly includes a stator core, an end insulation and a coil winding. A plurality of wiring terminals are installed on the end insulation. The wiring terminals are electrically connected to the coil winding. The sleeve seat includes a bottom plate and a sleeve protruding upward from the middle of the bottom plate. A plurality of terminal holes are arranged on the bottom plate. The ends of the wiring terminals extend from the terminal holes of the bottom plate. The outer rotor is sleeved on the outside of the stator assembly. The sealing gasket is installed on the bottom surface of the bottom plate and covers the terminal holes. A plurality of bosses corresponding to the terminal holes are protruded on the top surface of the sealing gasket. A through hole is arranged in the middle of the boss. The through hole passes through the boss and the sealing gasket. The through hole is located at the An annular step is provided on the inner wall surface and near the top of the boss, a center hole is formed in the middle of the annular step, a first rubber layer and a second rubber layer are respectively injection-molded on the top and bottom surfaces of the annular step, and a third rubber layer for covering the center hole is provided on the bottom surface of the second rubber layer; when the sealing gasket is installed on the bottom surface of the base plate, the boss of the sealing gasket extends into the terminal hole, and at the same time, the end of the terminal extends into the through hole and the center hole in the boss and pierces the third rubber layer and extends out of the sealing gasket, the sealing gasket cooperates with the base plate to achieve a sealing effect, and the sealing at the terminal is ensured by piercing the rubber, so that the sealing performance of the entire structure is optimized.

[0017] 2. Other advantages of the utility model are described in detail in the embodiment section of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram provided for the utility model;

[0019] Figure 2 An exploded view provided for the utility model;

[0020] Figure 3 A front view provided for the utility model;

[0021] Figure 4 for Figure 3 Sectional view of AA in the middle;

[0022] Figure 5 for Figure 4 A partial enlarged view of B in the middle;

[0023] Figure 6 A schematic diagram of the sealing gasket structure provided by the utility model;

[0024] Figure 7 A front view of the sealing gasket provided by the utility model;

[0025] Figure 8 for Figure 7 Cross-sectional view of CC. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1:

[0028] like Figures 1 to 8 As shown, this embodiment provides an outer rotor motor, including a rotating shaft, a stator assembly 2, an outer rotor and a sleeve seat 4, the stator assembly 2 includes a stator core 21, an end insulation 22 and a coil winding 23, a plurality of connection terminals 24 are installed on the end insulation 22, and the connection 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, a plurality of terminal holes 411 are provided on the bottom plate 41, and the ends of the connection terminals 24 extend from the terminal holes 411 of the bottom plate 41, the outer rotor is sleeved on the outside of the stator assembly 2, and the sealing gasket 5 is installed on the bottom surface of the bottom plate 41 and covers the terminal holes 411, characterized in that:

[0029] A plurality of bosses 51 corresponding to the terminal holes 411 are protruded from the top surface of the sealing gasket 5. A through hole 52 is provided in the middle of the boss 51. The through hole 52 penetrates the boss 51 and the sealing gasket 5. An annular step 53 is provided on the inner wall surface of the through hole 52 and near the top of the boss 51. A center hole 531 is formed in the middle of the annular step 53. A first rubber layer 532 and a second rubber layer 533 are respectively injection-molded on the top and bottom surfaces of the annular step 53. A third rubber layer 534 for covering the center hole is provided on the bottom surface of the second rubber layer 533.

[0030] When the sealing gasket 5 is installed on the bottom surface of the base plate 41, the boss 51 of the sealing gasket 5 extends into the terminal hole 411, and at the same time, the end of the terminal 24 extends into the through hole 52 and the center hole 531 in the boss 51 and pierces the third rubber layer 534 to extend out of the sealing gasket 5. The sealing gasket and the base plate cooperate to achieve a sealing effect, and the sealing at the terminal is ensured by piercing the rubber, so that the sealing performance of the entire structure is optimized.

[0031] The thickness of the third rubber layer 534 is 0.2 mm, and the structure is reasonably arranged, which facilitates the connection terminal to pierce the third rubber layer and ensures the sealing of the connection terminal.

[0032] The sealing gasket 5 is made of plastic, which ensures the insulation performance between the wiring terminal and the terminal hole on the sleeve seat.

[0033] A guide angle is provided at the entrance of the first rubber layer 532 to facilitate installation and guidance of the connection terminal, and the structural arrangement is reasonable.

[0034] A sealing groove 412 is provided on the bottom surface of the above-mentioned bottom plate 41, and a plurality of terminal holes 411 are located in the sealing groove 412. A fourth rubber layer 54 is provided on the top surface of the sealing gasket 5 and around the edge of a plurality of bosses. The height of the fourth rubber layer 54 is higher than the height of the sealing groove 412. When the sealing gasket 5 is installed on the bottom surface of the bottom plate 41, the fourth rubber layer 54 is installed in the sealing groove 412, and at the same time, the fourth rubber layer 54 is squeezed to achieve sealing. The structural arrangement is reasonable, and a better sealing effect is achieved through height difference coordination and fixation.

[0035] A plurality of first mounting holes 4122 are also provided on the bottom surface of the above-mentioned base plate 41, and a plurality of second mounting holes 55 are provided on the sealing gasket 5. The plurality of first mounting holes 4122 correspond to the plurality of second mounting holes 55 one by one, and the second mounting holes 55 are connected and locked with the first mounting holes 4122 by means of screws 100 passing through the second mounting holes 55. The second mounting holes 55 are U-shaped holes, and the sealing gasket can be smoothly installed even if the terminal structure is installed offset, and the structural arrangement is reasonable.

[0036] The above also includes a controller, which includes a shell and a circuit board installed in the shell. The shell is installed on the bottom surface of the bottom plate 41, and the connection terminal 24 extends from the sealing pad 5 and is electrically connected to the circuit board of the controller.

[0037] The above embodiments are preferred implementation modes of the present invention, but the implementation modes 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 included in the protection scope of the present invention.

Claims

1. An outer rotor motor, comprising a rotating shaft, a stator assembly (2), an outer rotor and a sleeve seat (4), wherein the stator assembly (2) comprises a stator core (21), an end insulation (22) and a coil winding (23), a plurality of connection terminals (24) are mounted on the end insulation (22), the connection terminals (24) and the coil winding (23) are electrically connected together, the sleeve seat (4) comprises a bottom plate (41) and a sleeve (42) protruding upward from the middle of the bottom plate (41), a plurality of terminal holes (411) are arranged on the bottom plate (41), the ends of the connection terminals (24) extend out from the terminal holes (411) of the bottom plate (41), the outer rotor is sleeved on the outside of the stator assembly (2), a sealing gasket (5) is mounted on the bottom surface of the bottom plate (41) and covers the terminal holes (411), and the characteristics are: A plurality of bosses (51) corresponding to the terminal holes (411) protrude from the top surface of the sealing gasket (5), a through hole (52) is provided in the middle of the boss (51), the through hole (52) penetrates the boss (51) and the sealing gasket (5), an annular step (53) is provided on the inner wall surface of the through hole (52) and near the top of the boss (51), a center hole (531) is formed in the middle of the annular step (53), a first rubber layer (532) and a second rubber layer (533) are respectively injection-molded on the top and bottom surfaces of the annular step (53), and a third rubber layer (534) for covering the center hole is provided on the bottom surface of the second rubber layer (533); When the sealing gasket (5) is installed on the bottom surface of the base plate (41), the boss (51) of the sealing gasket (5) extends into the terminal hole (411), and at the same time, the end of the connection terminal (24) extends into the through hole (52) and the center hole (531) in the boss (51) and pierces the third rubber layer (534) to extend out of the sealing gasket (5).

2. An outer rotor motor according to claim 1, characterized in that: The thickness of the third rubber layer (534) is 0.2 mm.

3. The outer rotor motor according to claim 1, characterized in that: The sealing gasket (5) is made of plastic.

4. The outer rotor motor according to claim 1, characterized in that: A guide angle is provided at the entrance of the first rubber layer (532).

5. An outer rotor motor according to claim 1 or 2 or 3 or 4, characterized in that: A sealing groove (412) is provided on the bottom surface of the bottom plate (41), and a plurality of terminal holes (411) are located in the sealing groove (412). A fourth rubber layer (54) is provided on the top surface of the sealing pad (5) and around the edge of the plurality of bosses. The height of the fourth rubber layer (54) is higher than the height of the sealing groove (412). When the sealing pad (5) is installed on the bottom surface of the bottom plate (41), the fourth rubber layer (54) is installed in the sealing groove (412) and the fourth rubber layer (54) is squeezed to achieve sealing.

6. An outer rotor motor according to claim 5, characterized in that: A plurality of first mounting holes (4122) are also provided on the bottom surface of the bottom plate (41), and a plurality of second mounting holes (55) are provided on the sealing gasket (5). The plurality of first mounting holes (4122) correspond to the plurality of second mounting holes (55) in a one-to-one manner, and the second mounting holes (55) are connected and locked with the first mounting holes (4122) by passing screws (100) through the second mounting holes (55).

7. An outer rotor motor according to claim 6, characterized in that: The second mounting hole (55) is a U-shaped hole.

8. An outer rotor motor according to claim 7, characterized in that: It also includes a controller, which includes a housing and a circuit board installed in the housing. The housing is installed on the bottom surface of the base plate (41). The connection terminal (24) extends from the sealing pad (5) and is electrically connected to the circuit board of the controller.

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