Utility model content
Technical problem to be solved in the utility model is, rain-proof structure is not had for existing model plane motor, heat up under big current too fast, affect the technical deficiencies such as electric efficiency, a kind of rainproof external-rotor DC. brush-less that certainly dispels the heat for air materials such as gyroplanes is provided.
First it should be noted that, when " upper cover " mentioned refers to that motor shaft is in using state perpendicular to the ground, be positioned at the end cap of upper end in the utility model, when " lower cover " refers to that motor shaft is in using state perpendicular to the ground, be positioned at the end cap of lower end.
For solving the problems of the technologies described above, it is rainproof from dispelling the heat external-rotor DC. brush-less that the utility model provides, it comprises the upper cover and lower cover that are fixedly connected with motor shaft, rotor is fixedly installed between this upper cover and lower cover, this covers and offers multiple gas port be obliquely installed, the inner side of this lower cover is provided with the spoke distributed radially centered by motor shaft, between each spoke, air admission hole is set, when motor shaft drives upper cover, when rotor and lower cover rotate together, the cool exterior air entered from air admission hole is blowed to the inner chamber of this motor by spoke that lower cover internal fixtion turns to constantly, discharged by gas port after arriving upper cover.
Being improved to further of such scheme, fan leaf sheet made by this spoke.
Being improved to further of such scheme, when motor shaft uses perpendicular to ground, and upper cover is when upper, and this gas port is inner high outside low angling hole, flows in motor body to prevent rainwater.This gas port can be arranged on the sidewall of this enclosing cover, also can be arranged on the roof of this enclosing cover.
The utility model utilizes aero dynamo to be generally operating state perpendicular to ground, and under motor, cover the spoke that setting distributes radially, and fan leaf chip made by spoke, the blade fixedly turned to during electric machine rotation can ensure upwards cool exterior air to be blowed to constantly the intermediate cylindrical intracoelomic cavity that stator winding and external rotor cylinder are embedded with sheet magnetite, arrives the upper cover at motor top.Because upper cover is positioned at the top, and be provided with skewed multiple gas ports, each gas port is designed to inner high outside low angling hole form, flow in motor body to prevent rainwater, it is external that air-flow sprays to motor from top to bottom through the gas port of upper cover again, reaches and make motor realize auto-radiating and rainproof dual work efficiency.
Compared with prior art, the beneficial effect that the utility model has is:
1. the utility model can be lowered the temperature by automatic heat radiation, thus protection coil does not burn out, and improves the efficiency of motor;
2. the utility model can be rainproof.
Accompanying drawing explanation
Fig. 1 is the rainproof structural representation from heat radiation external-rotor DC. brush-less of the utility model.
Fig. 2 is the utility model lower cover cross-sectional view.
Fig. 3 is the utility model lower cover plan structure schematic diagram.
Fig. 4 is the utility model superstructure cross-sectional schematic.
In figure: upper cover 1; Lower cover 2; Rotor 3; Motor shaft 4; Stator 5; Bearing 6; Gas port 11; Spoke 21; Air admission hole 22.
Embodiment
As Figure 1-Figure 4, the utility model is rainproof comprises from heat radiation external-rotor DC. brush-less one embodiment the upper cover 1 and lower cover 2 that are fixedly connected with motor shaft 4, rotor 3 is fixedly installed between this upper cover 1 and lower cover 2, the sidewall of this upper cover 1 offers multiple gas port 11 be obliquely installed, the inner side of this lower cover 2 is provided with the spoke 21 distributed radially centered by motor shaft, between each spoke 21, air admission hole 22 is set, when motor shaft drives upper cover 1, when rotor 3 and lower cover 2 rotate together, the cool exterior air entered from air admission hole 22 is blowed to the inner chamber of this motor by spoke 21 that lower cover 2 internal fixtion turns to constantly, discharged by gas port after arriving upper cover 1.For balanced air drag, and make air-supply better effects if, the fan leaf sheet at certain inclination angle made by this spoke.For the rainwater under preventing from vertically falling or tilt to waft enters in motor body, this gas port is inner high outside low angling hole.