Brushless outer rotor motor

Abstract

The invention relates to a brushless external rotor motor, which comprises a stator part and a rotor part, the stator part comprises a bearing assembly, a winding stator, a circuit board assembly and an end cover, the rotor part comprises a rotor casing, a first magnetic ring and a second magnetic ring, and the winding stator is connected with the circuit board assembly through a connector. Compared with the prior art, the method has the advantages of solving the problems of wire breakage and insulation damage in a severe environment and the like.

Description

Technical Field

[0001] The invention relates to a motor, in particular to a brushless outer rotor motor. Background Art

[0002] At present, most of the brushless outer rotor motors in the industry use the solution of directly welding the winding wire end to the circuit board assembly to connect the winding stator and the circuit board assembly. This solution has fewer parts, relatively low cost, and a relatively simple process, so it is widely used in industrial motors. However, this solution also has some disadvantages: the wire between the winding wire and the circuit board assembly is prone to wire breakage in high and low temperature impact environments, and is prone to wire shaking and wire breakage or insulation damage in random vibration environments.

[0003] Therefore, how to develop a new winding and circuit board assembly connection technology to solve the problems of wire breakage and insulation damage in harsh environments. Summary of the invention

[0004] The purpose of the present invention is to provide a brushless outer rotor motor in order to overcome the defects of the prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to one aspect of the present invention, a brushless outer rotor motor is provided, comprising a stator part and a rotor part, wherein the stator part comprises a bearing assembly, a wound stator, a circuit board assembly and an end cover, and the rotor part comprises a rotor housing, a first magnetic ring and a second magnetic ring, and the wound stator and the circuit board assembly are connected via a connector.

[0007] As a preferred technical solution, the connector includes an upper end surface and a lower end surface, the upper end surface is close to the winding stator, and the lower end surface is close to the circuit board assembly.

[0008] As a preferred technical solution, the inner side of the connector is close to the end cover or the bearing assembly, and the outer side is close to the rotor part.

[0009] As a preferred technical solution, the connector includes an insulating member and a pin, wherein the pin is mounted on the insulating member, one end of the pin is connected to the winding outlet end of the wound stator, and the other end is connected to the circuit board assembly;

[0010] The insulating member isolates the pin from the end cap or the bearing assembly, and the insulating member isolates the pin from the rotor portion.

[0011] As a preferred technical solution, a wire protection structure for wrapping the common end of the winding of the stator is provided on a side of the connector away from the pin.

[0012] As a preferred technical solution, the pins are straight pins, bent pins with a set angle, or C-shaped pins, and the pins are evenly distributed on the insulating member or arranged at any angle.

[0013] As a preferred technical solution, the pin is cylindrical, square or flat.

[0014] As a preferred technical solution, the connector is in a circular, arc-shaped or rectangular structure.

[0015] As a preferred technical solution, the winding stator includes a stator core assembly, a winding and a winding wire. The stator core assembly is provided with an insulating frame, and the insulating frame has protruding steps at the upper and lower ends. The inner side of the step is close to the bearing assembly, and the outer side is close to the winding and the winding wire. The winding wire is close to the outer side of the step of the insulating frame.

[0016] As a preferred technical solution, the bearing assembly includes a bearing, a rotating shaft and a steel sleeve, the steel sleeve is provided with a bearing shoulder structure and a bearing chamber structure, the outer diameter of the steel sleeve is provided with a first rubber storage tank structure, the upper side of the outer diameter of the steel sleeve is fixed to the winding stator, and the lower side of the outer diameter of the steel sleeve is fixed to the inner hole of the end cover;

[0017] The rotating shaft is fixed to the rotor casing, and a second glue storage tank structure is provided at the inner hole where the rotor casing and the rotating shaft cooperate.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1) The present invention uses a connector to connect the winding stator and the circuit board assembly, solving the problems of wire breakage and insulation damage in harsh environments;

[0020] 2) The present invention has better safety. The connector is close to the winding stator, but does not touch the winding part of the winding stator. At the same time, an insulating member is used to isolate the pin from the end cover or the bearing assembly, and the pin from the rotor part, thereby further improving safety;

[0021] 3) The present invention has better reliability. A wire protection structure is designed on the side of the connector away from the pin, which surrounds the common end of the winding and does not contact the end of the winding, further improving reliability.

[0022] 4) The present invention has a wide range of applications. The connector is in a circular ring, rectangular, arc-shaped structure or other structures that can achieve the same function, which further increases the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the connector structure of Embodiment 1 of the present invention;

[0026] FIG4( a ) is a schematic diagram of a connector structure according to Embodiment 2 of the present invention;

[0027] FIG4( b ) is a schematic diagram of a second connector structure according to Embodiment 2 of the present invention;

[0028] FIG4( c ) is a third schematic diagram of the connector structure of Embodiment 2 of the present invention;

[0029] FIG4( d ) is a schematic diagram of a fourth connector structure according to Embodiment 2 of the present invention;

[0030] Among them, 1 is the rotor housing, 2 is the first magnetic steel, 3 is the second magnetic steel, 4 is the bearing assembly, 5 is the winding stator, 6 is the connector, 7 is the circuit board assembly, 8 is the end cover, 6.1 is the insulating part, and 6.2 is the pin. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] Example 1

[0033] like Figure 1 and Figure 2 As shown, a brushless outer rotor motor includes a stator part and a rotor part, wherein the stator part includes a bearing assembly 4, a winding stator 5, a circuit board assembly 7 and an end cover 8, and the rotor part includes a rotor housing 1, a first magnetic ring 2 and a second magnetic ring 3, and the winding stator 5 and the circuit board assembly 7 are connected by a connector 6. The present invention uses a connector to connect the winding stator and the circuit board assembly, which solves the problem of disconnection and insulation damage in harsh environments.

[0034] The connector has two end faces, the upper end face is close to the winding stator and does not touch the winding part of the winding stator, and the lower end face is close to the circuit board assembly and inserted into the circuit board assembly; it has inner and outer sides, the inner side is close to the end cover or bearing assembly, and the outer side is close to the rotor part and does not touch the rotor part.

[0035] like Figure 3As shown, the connector 6 is annular, comprising three pins 6.2 and a circular insulating member 6.1. The insulating member 6.1 supports the three pins, the pins are parallel to the axis of the insulating member, and the relative positions of the three pins are ensured; the upper ends of the three pins are respectively welded with the U, V, and W lines of the power line of the winding outlet, and the lower ends are connected to the motor power line position on the circuit board assembly; the insulating member isolates the pins from the end cover or the bearing assembly, and isolates the pins from the rotor part; a wire protection structure is designed on the side of the connector away from the pins, which surrounds the common end of the winding and does not contact the end of the winding. The pin 6.2 can be a straight pin, a bent pin with a certain angle, or a C-shaped pin. The lower end of the pin 6.2 is connected to the circuit board assembly, and the upper end of the pin 6.2 is connected to the winding outlet. The inner and outer sides of the annular connector isolate the winding outlet and the pin from the bearing assembly and the end cover boss;

[0036] A wire protection structure is designed on one side of the connector 6 away from the pin, which surrounds the common end of the winding and does not contact the end of the winding.

[0037] The wound stator includes a winding, a winding wire, and a stator core assembly; the stator core assembly is designed with an insulating frame, which has protruding steps at both ends, the steps have inner and outer sides, the inner side is close to the bearing assembly, and the outer side is close to the winding and the winding wire; the insulating frame has upper and lower ends, the upper end faces upward, and the lower end faces downward with the winding wire, and the winding wire is attached to the outer side of the insulating frame step.

[0038] The bearing assembly includes two bearings, a rotating shaft, a spring, a sleeve, a washer, and a steel sleeve; the steel sleeve is designed with a bearing shoulder structure and a bearing chamber structure, and the outer diameter is designed with a rubber storage tank structure. The upper side of the outer diameter of the steel sleeve is fixed to the winding stator, and the lower side of the outer diameter is fixed to the inner hole of the end cover; the rotating shaft is fixed to the rotor housing, and a rubber storage tank structure is set at the inner hole where the rotor housing and the rotating shaft match to fix the rotating shaft and the rotor housing; the washer is designed with a shoulder structure and a protective spring structure, the washer shoulder contacts the inner ring of the lower bearing, the bottom of the washer cavity contacts the spring, the inner side of the outer cylindrical surface protects the spring, and the inner side of the inner cylindrical surface protects the spring from contacting the rotating shaft. The washer can also be directly designed as a simplified U-shaped structure, which plays the same protective role as this washer.

[0039] Example 2

[0040] like Figures 4(a) to 4(d) As shown, the connector in the present invention may also be arc-shaped or rectangular, including 3 pins and an arc-shaped or rectangular insulating member, which is pre-connected with the circuit board assembly as a whole and assembled together with the circuit board assembly. The pin may be a straight pin, a bent pin with a certain angle, or a C-shaped pin. The lower end of the pin is connected to the circuit board assembly, and the upper end of the pin is connected to the winding outlet.

[0041] The connector in the present invention may also be an annular type, comprising three pins and an annular insulating member. The pins may be arranged evenly on the annular ring at 120° or at any angle. The pins may be cylindrical, square, or flat. They are pre-connected to the circuit board assembly as a whole and assembled together with the circuit board assembly. The pins may be straight pins, bent pins with a certain angle, or C-shaped pins. The lower ends of the pins are connected to the circuit board assembly, and the upper ends of the pins are connected to the winding output wires.

[0042] The rest is the same as in Example 1.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A brushless outer rotor motor, comprising a stator part and a rotor part, wherein the stator part comprises a bearing assembly (4), a winding stator (5), a circuit board assembly (7) and an end cover (8), and the rotor part comprises a rotor housing (1), a first magnetic ring (2) and a second magnetic ring (3), characterized in that: The winding stator (5) and the circuit board assembly (7) are connected via a connector (6).

2. A brushless outer rotor motor according to claim 1, characterized in that: The connector (6) comprises an upper end surface and a lower end surface, wherein the upper end surface is close to the winding stator (5) and the lower end surface is close to the circuit board assembly (7).

3. A brushless outer rotor motor according to claim 1, characterized in that: The connector (6) is close to the end cover (8) or the bearing assembly (4) on its inner side and close to the rotor part on its outer side.

4. A brushless outer rotor motor according to claim 1, characterized in that: The connector (6) comprises an insulating member (6.1) and a plug pin (6.2), wherein the plug pin (6.2) is mounted on the insulating member (6.1), one end of the plug pin (6.2) is connected to the winding output end of the wound stator (5), and the other end is connected to the circuit board assembly (7); The insulating member (6.1) isolates the pin (6.2) from the end cover (8) or the bearing assembly (4), and the insulating member (6.1) isolates the pin (6.2) from the rotor part.

5. A brushless outer rotor motor according to claim 4, characterized in that: A wire protection structure for wrapping around the common end of the winding of the winding stator (5) is provided on a side of the connector (6) away from the plug pin (6.2).

6. A brushless outer rotor motor according to claim 4, characterized in that: The plug pins (6.2) are straight plug pins, bent plug pins with a set angle, or C-shaped plug pins, and the plug pins (6.2) are evenly distributed on the insulating member (6.1) or arranged at any angle.

7. A brushless outer rotor motor according to claim 4, characterized in that: The plug pin (6.2) is cylindrical, square or flat.

8. A brushless outer rotor motor according to claim 4, characterized in that: The connector (6) is in the shape of a circular ring, an arc or a rectangular structure.

9. The brushless outer rotor motor according to claim 1, characterized in that: The winding stator (5) comprises a stator core assembly, a winding and winding outgoing wires, the stator core assembly is provided with an insulating frame, and the insulating frame is provided with protruding steps at the upper and lower ends, the inner side of the step is close to the bearing assembly (4), and the outer side is close to the winding and the winding outgoing wires, and the winding outgoing wires are close to the outer side of the insulating frame step.

10. The brushless outer rotor motor according to claim 1, characterized in that: The bearing assembly (4) comprises a bearing, a rotating shaft and a steel sleeve, the steel sleeve is provided with a bearing shoulder structure and a bearing chamber structure, the outer diameter of the steel sleeve is provided with a first rubber storage tank structure, the upper side of the outer diameter of the steel sleeve is fixed to the winding stator (5), and the lower side of the outer diameter of the steel sleeve is fixed to the inner hole of the end cover (8); The rotating shaft is fixed to the rotor casing (1), and a second glue storage tank structure is provided at the inner hole where the rotor casing (1) and the rotating shaft cooperate.

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