External rotor motor

Abstract

The utility model discloses an external rotor motor, which comprises a motor part and an electric control part, a bottom plate is provided with a plurality of wire passing holes, an end insulator far away from the bottom plate is provided with a plurality of installation grooves, stator terminals are installed in the installation grooves, the middle of each stator terminal is provided with an accommodating groove, and the bottom of each stator terminal is provided with a terminal hole. The electric control part further comprises a stator butt-joint wire, the stator butt-joint wire comprises a butt-joint wire lead and a wire terminal, the wire terminal is connected to one end of the butt-joint wire lead, and the wire terminal extends into the end insulation position away from the bottom plate and is inserted into the containing groove of the stator terminal. The control circuit board is electrically connected with the coil winding, the stator terminal is connected through the stator butt joint wire, conduction of the enameled wire, the stator assembly terminal, the stator butt joint wire and the circuit board assembly is completed, the creepage distance between the control circuit board and the shell and the creepage distance between the control circuit board and the bearing seat are reduced, and therefore the height of the motor is reduced, and the size of the motor is reduced.

Description

Technical Field

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

[0002] Industry background: During the development of motors, the requirement for motor miniaturization is getting higher and higher. Therefore, it is necessary to control the total height of the motor. A motor with a lower total height occupies a smaller volume, meeting the current market demand. A new motor solution is designed to solve the problem.

[0003] When the external rotor motor rotates when the stator assembly is pressed into the bearing seat, the pin is not firmly engaged with the terminal of the circuit board assembly. Eventually, the motor fails to operate due to a phase loss, and a new design solution is needed to solve the problem.

[0004] Existing technology and its technical problems:

[0005] 1. The existing technology is the external rotor EC72 series platform for mass-produced motors of the company. There is a creepage distance between the top of the circuit board assembly and the end cover. There is an insulating seat separating the bottom of the circuit board assembly from the bearing seat, occupying the space of the motor.

[0006] 2. When the stator assembly is pressed into the bearing seat, rotation occurs, making the pin of the original structure stator not firmly engaged with the terminal of the circuit board assembly, resulting in the motor failing to operate due to a phase loss and ultimately not meeting the industry requirements. Summary of the Invention

[0007] The purpose of the utility model is to provide an external rotor motor to solve the technical problem that in the existing technology, there is a creepage distance between the top of the circuit board assembly and the end cover, and there is an insulating seat separating the bottom of the circuit board assembly from the bearing seat, occupying the space of the motor.

[0008] The technical solution of the utility model is realized as follows:

[0009] The utility model provides an external rotor motor, including a motor part and an electric control part, wherein:

[0010] The motor part includes a rotating shaft, a stator assembly, an external rotor, and a sleeve seat. The sleeve seat includes a bottom plate and a sleeve protruding upward from the middle of the bottom plate. Bearing chambers are provided at both ends of the sleeve, and bearings are installed in the bearing chambers. The stator assembly is sleeved outside the sleeve, and the external rotor is sleeved outside the stator assembly. The stator assembly includes a stator core, end insulation, and a coil winding. End insulation is installed on both end faces of the stator core, and the coil winding is wound around the end insulation.

[0011] The electric control part includes a housing and a control circuit board. The housing is installed on the bottom surface of the bottom plate, and a controller cavity is formed between the housing and the bottom plate. The control circuit board is installed in the controller cavity.

[0012] It is characterized in that: several wire passing holes are provided on the bottom plate, several mounting grooves are provided on the end insulation away from the bottom plate, stator terminals are installed in the mounting grooves, a receiving groove is provided in the middle of the stator terminals, a terminal hole for piercing the enameled wire skin of the coil winding is provided at the bottom of the stator terminals, so that the enameled wire of the coil winding is electrically connected to the stator terminals, and the terminal hole is communicated with the receiving groove;

[0013] The electric control part further includes a stator connection wire, the stator connection wire includes a connection wire lead and a wire terminal, the wire terminal is connected to one end of the connection wire lead, the other end of the connection wire lead is electrically connected to the control circuit board, the wire terminal and part of the connection wire lead pass through the wire passing hole and enter the motor part, and the wire terminal extends to the end insulation away from the bottom plate and is inserted into the receiving groove of the stator terminal, so that the control circuit board is electrically connected to the coil winding.

[0014] An insulating seat is installed in the above-mentioned housing, a positioning post is provided in the middle of the insulating seat, a positioning hole is provided in the middle of the control circuit board, and when the control circuit board is installed in the insulating seat, the control circuit board is sleeved on the positioning post of the insulating seat through the positioning hole.

[0015] A first notch is provided on the above-mentioned insulating seat, a heat-conducting silica gel sheet is installed at the first notch, the heat-conducting silica gel sheet is attached to the housing, the control circuit board is installed on the insulating seat, the control circuit board is attached to the heat-conducting silica gel sheet, and the control circuit board transfers heat to the heat-conducting silica gel sheet and then to the housing.

[0016] A wiring port is provided on the above-mentioned housing, a sealing plug is installed at the edge of the wiring port, a second notch is provided on the insulating seat corresponding to the wiring port, and several second pins are provided on the control circuit board, and several second pins extend out from the wiring port.

[0017] Potting glue for encapsulating the control circuit board is injected into the above-mentioned insulating seat, and the potting glue potting-seals the control circuit board and part of the connection wire leads together.

[0018] The above-mentioned wire passing hole is arc-shaped.

[0019] The above-mentioned stator core includes an annular yoke portion and several tooth portions extending from the annular yoke portion, an embedding wire groove is formed between adjacent two tooth portions, the coil winding is embedded in the embedding wire groove, and the connection wire lead passes through the embedding wire groove and is led to the end insulation away from the bottom plate.

[0020] The above-mentioned stator assembly further includes a slot wedge, the slot wedge is installed at the opening of the embedding wire groove, and the slot wedge is used for blocking the connection wire lead.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] 1. The utility model includes a motor part and an electronic control part, wherein: the motor part includes a rotating shaft, a stator assembly, an outer rotor and a sleeve seat. The sleeve seat includes a bottom plate and a sleeve protruding upward from the middle of the bottom plate. Bearing chambers are provided at both ends of the sleeve, and bearings are installed in the bearing chambers. The stator assembly is sleeved outside the sleeve, and the outer rotor is sleeved outside the stator assembly. The stator assembly includes a stator core, end insulation and a coil winding. End insulation is installed on both end faces of the stator core, and the coil winding is wound around the end insulation; the electronic control part includes a housing and a control circuit board. The housing is installed on the bottom surface of the bottom plate, and a controller cavity is formed between the housing and the bottom plate. The control circuit board is installed in the controller cavity; several wire passing holes are provided on the bottom plate, and several installation grooves are provided on the end insulation far from the bottom plate. Avoidance spaces are provided on both sides of the installation groove for the enameled wire of the coil winding to pass through. A stator terminal is installed in the installation groove. A receiving groove is provided in the middle of the stator terminal, and a terminal hole for piercing the skin of the enameled wire of the coil winding is provided at the bottom of the stator terminal, so that the enameled wire of the coil winding is electrically connected to the stator terminal. The terminal hole communicates with the receiving groove; the electronic control part also includes a stator connection wire. The stator connection wire includes a connection wire lead and a wire terminal. The wire terminal is connected to one end of the connection wire lead, and the other end of the connection wire lead is electrically connected to the control circuit board. The wire terminal and part of the connection wire lead pass through the wire passing hole and enter the motor part. The wire terminal extends to the end insulation far from the bottom plate and is inserted into the receiving groove of the stator terminal, so that the control circuit board is electrically connected to the coil winding. The stator connection wire is used to connect the stator terminals, completing the conduction of the enameled wire - stator assembly terminal - stator connection wire - circuit board assembly, and reducing the creepage distance between the control circuit board and the housing and the bearing seat. Furthermore, the height of the motor is reduced and the volume of the motor is decreased.

[0023] 2. Other advantages of the utility model are described in detail in the embodiment part of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view provided by the utility model;

[0025] Figure 2 is another perspective view provided by the utility model;

[0026] Figure 3 is a partial exploded view provided by the utility model;

[0027] Figure 4 is another partial exploded view provided by the utility model;

[0028] Figure 5 is a structural schematic diagram of the sleeve seat and the electronic control part provided by the utility model;

[0029] Figure 6 is a structural schematic diagram of the electronic control part provided by the utility model;

[0030] Figure 7 Partial structural schematic diagram of the electric control part provided by the present utility model;

[0031] Figure 8 Schematic diagram of the stator structure provided by the present utility model;

[0032] Figure 9 Side view provided by the present utility model;

[0033] Figure 10 is Figure 9 Cross-sectional view taken along A-A in Specific implementation manners

[0034] 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 making creative efforts shall fall within the protection scope of the present utility model.

[0035] Embodiment 1:

[0036] As Figures 1 to 10 shown, this embodiment provides an outer rotor motor, which includes a motor part 10 and an electric control part 20, wherein:

[0037] The motor part 10 includes a rotating shaft 1, a stator assembly 2, an outer rotor 3 and a sleeve seat 4. 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, and bearings are installed in the bearing chambers 421. The stator assembly 2 is sleeved outside the sleeve 42, and the outer rotor 3 is sleeved outside the stator assembly 2. The stator assembly 2 includes a stator core 21, end insulation 22 and a coil winding 23. End insulation 22 is installed on both end faces of the stator core 21, and the coil winding 23 is wound around the end insulation 22;

[0038] The electric control part 20 includes a housing 201 and a control circuit board 202. The housing 201 is installed on the bottom surface of the bottom plate 41, and a controller cavity 203 is formed between the housing 201 and the bottom plate 41. The control circuit board 202 is installed in the controller cavity 203;

[0039] It is characterized in that: a plurality of wire passing holes 411 are provided on the bottom plate 41, and a plurality of mounting grooves 221 are provided on the end insulation 22 away from the bottom plate 41. Clearance openings 220 are provided on both sides of the mounting groove 221 for the enameled wire of the coil winding 23 to pass through. A stator terminal 222 is installed in the mounting groove 221. A receiving groove 222a is provided in the middle of the stator terminal 222. A terminal hole 222b for piercing the surface of the enameled wire of the coil winding 23 is provided at the bottom of the stator terminal 222, so that the enameled wire of the coil winding 23 is electrically connected to the stator terminal 222, and the terminal hole 222b is communicated with the receiving groove 222a;

[0040] The electronic control part 20 further includes a stator connection wire 204. The stator connection wire 204 includes a connection wire lead 204a and a wire terminal 204b. The wire terminal 204b is connected to one end of the connection wire lead 204a. The other end of the connection wire lead 204a is electrically connected to the control circuit board 202. The wire terminal 204b and a part of the connection wire lead 204a pass through the wire passing hole 411 and enter the motor part 10. The wire terminal 204b extends to the end insulation 22 away from the bottom plate 41 and is inserted into the receiving groove 222a of the stator terminal 222, so that the control circuit board 202 is electrically connected to the coil winding 23. The stator terminal is connected by using the stator connection wire to complete the conduction of the enameled wire - stator assembly terminal - stator connection wire - circuit board assembly, and reduce the creepage distance between the control circuit board and the housing and the bearing seat, thereby reducing the height of the motor and reducing the volume of the motor.

[0041] An insulation seat 2011 is installed in the housing 201 described above. A positioning post 2012 is provided in the middle of the insulation seat 2011. A positioning hole 2021 is provided in the middle of the control circuit board 202. When the control circuit board 202 is installed in the insulation seat 2011, the control circuit board 202 is sleeved on the positioning post 2012 of the insulation seat 2011 through the positioning hole 2021, which is convenient for the installation and positioning of the control circuit board, and the structural arrangement is reasonable.

[0042] A first notch 2013 is provided on the insulation seat 2011 described above. A heat-conducting silica gel sheet 2014 is installed at the first notch 2013. The heat-conducting silica gel sheet 2014 is attached to the housing 201. The control circuit board 202 is installed on the insulation seat 2011, and the control circuit board 202 is attached to the heat-conducting silica gel sheet 2014. The control circuit board 202 transfers heat to the heat-conducting silica gel sheet 2014 and then to the housing 201, improving the heat dissipation effect of the control circuit board, and the structural arrangement is reasonable.

[0043] A wiring port 2015 is provided on the housing 201 described above. A sealing plug 2016 is installed at the edge of the wiring port 2015. A second notch 2010 corresponding to the wiring port 2015 is provided on the insulation seat 2011. A plurality of second pins 2022 are provided on the control circuit board 202, and the plurality of second pins 2022 extend out from the wiring port 2015.

[0044] The above-mentioned insulating base is filled with potting glue 300 for encapsulating the control circuit board 202. The potting glue 300 encapsulates the control circuit board 202 and part of the butt joint wire leads 204a together, blocking the ingress of water in the housing direction and preventing the control circuit board from failing, reducing the possibility of motor failure, enhancing the waterproof level of the motor, and meeting the new requirements of the industry.

[0045] The above-mentioned wire passing hole 411 is arc-shaped, and the structural arrangement is reasonable.

[0046] The above-mentioned stator core 21 includes an annular yoke portion 211 and a plurality of tooth portions 212 extending from the annular yoke portion 211. An insertion groove 213 is formed between two adjacent tooth portions 212. The coil winding 23 is inserted into the insertion groove 213, and the butt joint wire lead 204a passes through the insertion groove 213 and is led to the end insulation 22 away from the bottom plate 41.

[0047] The above-mentioned stator assembly further includes a slot wedge 24. The slot wedge 24 is installed at the opening of the insertion groove 213. The slot wedge 24 is used to block the butt joint wire lead 204a, effectively preventing the positioning of the butt joint wire lead, and the structural arrangement is reasonable.

[0048] 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 outer rotor motor, comprising a motor part (10) and an electric control part (20), wherein: The motor part (10) includes a rotating shaft (1), a stator assembly (2), an outer rotor (3) and a sleeve seat (4). 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), and bearings are installed in the bearing chambers (421). The stator assembly (2) is sleeved outside the sleeve (42), and the outer rotor (3) is sleeved outside the stator assembly (2). The stator assembly (2) includes a stator core (21), end insulation (22) and a coil winding (23). End insulation (22) is installed on both end faces of the stator core (21), and the coil winding (23) is wound around the end insulation (22); The electric control part (20) includes a housing (201) and a control circuit board (202). The housing (201) is installed on the bottom surface of the bottom plate (41), and a controller cavity (203) is formed between the housing (201) and the bottom plate (41). The control circuit board (202) is installed in the controller cavity (203); It is characterized in that: a plurality of wire passing holes (411) are provided on the bottom plate (41), and a plurality of mounting grooves (221) are provided on the end insulation (22) far from the bottom plate (41). Avoidance openings (220) are provided on both sides of the mounting groove (221) for the enameled wire of the coil winding (23) to pass through. A stator terminal (222) is installed in the mounting groove (221). A receiving groove (222a) is provided in the middle of the stator terminal (222). A terminal hole (222b) for piercing the enameled wire skin of the coil winding (23) is provided at the bottom of the stator terminal (222), so that the enameled wire of the coil winding (23) is electrically connected to the stator terminal (222), and the terminal hole (222b) communicates with the receiving groove (222a); The electric control part (20) further includes a stator connection wire (204). The stator connection wire (204) includes a connection wire lead (204a) and a wire terminal (204b). The wire terminal (204b) is connected to one end of the connection wire lead (204a). The other end of the connection wire lead (204a) is electrically connected to the control circuit board (202). The wire terminal (204b) and a part of the connection wire lead (204a) pass through the wire passing hole (411) and enter the motor part (10). The wire terminal (204b) extends to the end insulation (22) far from the bottom plate (41) and is inserted into the receiving groove (222a) of the stator terminal (222), so that the control circuit board (202) is electrically connected to the coil winding (23).

2. The external rotor motor according to claim 1, characterized in that: An insulating seat (2011) is installed in the housing (201). A positioning post (2012) is provided in the middle of the insulating seat (2011). A positioning hole (2021) is provided in the middle of the control circuit board (202). When the control circuit board (202) is installed in the insulating seat (2011), the control circuit board (202) is sleeved on the positioning post (2012) of the insulating seat (2011) through the positioning hole (2021).

3. The external rotor motor according to claim 2, characterized in that: The insulating base (2011) is provided with a first notch (2013). A heat-conducting silica gel sheet (2014) is installed at the first notch (2013). The heat-conducting silica gel sheet (2014) is in close contact with the housing (201). The control circuit board (202) is installed on the insulating base (2011). The control circuit board (202) is in contact with the heat-conducting silica gel sheet (2014). The control circuit board (202) transfers heat to the heat-conducting silica gel sheet (2014), and then to the housing (201).

4. The external rotor motor according to claim 3, characterized in that: The housing (201) is provided with a wiring port (2015). A sealing plug (2016) is installed at the edge of the wiring port (2015). The insulating base (2011) is provided with a second notch (2010) corresponding to the wiring port (2015). The control circuit board (202) is provided with a plurality of second pins (2022). The plurality of second pins (2022) extend out from the wiring port (2015).

5. An external rotor motor according to claim 1 or 2 or 3 or 4, characterized in that: The inside of the insulating base is filled with potting glue (300) for encapsulating the control circuit board (202). The potting glue (300) encapsulates the control circuit board (202) and part of the docking wire leads (204a) together.

6. The external rotor motor according to claim 5, characterized in that: The wire passing hole (411) is arc-shaped.

7. The external rotor motor according to claim 6, characterized in that: The stator core (21) includes an annular yoke portion (211) and a plurality of tooth portions (212) extending from the annular yoke portion (211). An embedding slot (213) is formed between two adjacent tooth portions (212). The coil winding (23) is embedded in the embedding slot (213). The docking wire leads (204a) pass through the embedding slot (213) and are led to the end insulation (22) far from the bottom plate (41).

8. The external rotor motor according to claim 7, characterized in that: The stator assembly further includes a slot wedge (24). The slot wedge (24) is installed at the opening of the embedding slot. The slot wedge (24) is used to block the docking wire leads (204a).

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