CN202889118U

CN202889118U - Motor and vehicle cooling fan using same

Info

Publication number: CN202889118U
Application number: CN2012204433501U
Authority: CN
Inventors: 李永斌; 谢小五; 孙宪坤
Original assignee: Johnson Electric Shenzhen Co Ltd
Current assignee: Johnson Electric Shenzhen Co Ltd
Priority date: 2012-09-03
Filing date: 2012-09-03
Publication date: 2013-04-17
Anticipated expiration: 2022-09-03

Abstract

The utility model discloses a motor. The motor comprises a stator, a rotor and a circuit board, wherein the rotor can rotate with respect to the stator, the circuit board is fixed with respect to the stator, an inductor which comprises a magnetizer and a wire winded on the magnetizer is arranged on the circuit board, and the inductor has the functions of an overcurrent protector, the core of the inductor being an aluminium wire or a copper-clad aluminum wire. The utility model further discloses a vehicle cooling fan using the motor.

Description

Motor and use the automobile cooling fan of this motor

Technical field

The utility model relates to a kind of motor, relates in particular to a kind of motor and uses the automobile cooling fan of this motor.

Background technology

General a kind of motor in particular for the motor of automobile cooling fan, comprises stator, rotor and end cap at present.Rotor comprises rotating shaft, is fixed in iron core and the commutator in the rotating shaft, winding, the winding that is wound on the iron core is electrically connected with commutator.End cap is provided with brush.Thereby brush and commutator sliding contact are the rotor power supply.In addition, also be provided with inductance and overcurrent protective device on the end cap, or the external overcurrent protective device of motor.The motor component of this kind structure is many, complex structure, and cost is higher.

Summary of the invention

Given this, be necessary to provide a kind of simple in structure, lower-cost motor and use the automobile cooling fan of this motor.

The utility model provides a kind of motor; comprise stator, rotor and circuit board; but described rotor relative stator rotation; described circuit board relative stator is fixed; described circuit board is provided with an inductance, and described inductance comprises wire, and described wire comprises core and is coated on the insulating barrier of core periphery; described inductance possesses the function of overcurrent protective device simultaneously, and the core of described inductance is aluminum steel or copper-clad aluminum conductor.

Better, described inductance also comprises magnetic conductor, described wire is wound on the magnetic conductor.

Better, the core of described wire is copper-clad aluminum conductor, the shared quality of the copper of described copper-clad aluminum conductor than scope between 20% to 40%.

Better, described motor is brush motor.

Better, described stator comprises a housing and is located at the permanent magnet of inner walls, and described rotor comprises a rotating shaft, be fixed in iron core and the commutator in the rotating shaft and be wound in winding on the iron core, and described circuit board is provided with some brushes.

Better, described circuit board is square, and described brush is four, and described brush the angular direction is disposed along described circuit board.

Better, described inductance is contained in the shell, described shell by resistant to elevated temperatures fire proofing or not combustible material make.

Better, described shell is by bakelite, or pottery, or glass is made.

Better, described inductance is by crimping or welding or first crimping, and the mode of rear welding is connected in the circuit.

The utility model also provides a kind of automobile cooling fan; the motor that it comprises impeller and drives described vane rotary; described motor comprises stator, rotor and circuit board; but described rotor relative stator rotation; described circuit board relative stator is fixed; described circuit board is provided with an inductance; described inductance comprises magnetic conductor and is wound in wire on the magnetic conductor; described wire comprises core and is coated on the insulating barrier of core periphery; described inductance possesses the function of overcurrent protective device simultaneously, and the core of described inductance is aluminum steel or copper-clad aluminum conductor.

Because the wire of the inductance of said motor is made of aluminum steel or copper-clad aluminum conductor; therefore described inductance can be used as overcurrent protective device simultaneously; namely in this motor; inductance and overcurrent protective device are integrated into an electronic component; so; simplified the parts of motor, made the structure of motor more simple, cost is lower.

In order further to understand feature of the present utility model and technology contents, see also following about detailed description of the present utility model and accompanying drawing, yet institute's accompanying drawing only provide with reference to and the explanation usefulness, the utility model is limited.

Description of drawings

Fig. 1 is the three-dimensional combination figure of the automobile cooling fan of the utility model one embodiment;

Fig. 2 is the stereogram of the motor of automobile cooling fan shown in Figure 1;

Fig. 3 is the three-dimensional exploded view of motor shown in Figure 2;

Fig. 4 is the schematic diagram of the circuit board of motor shown in Figure 3;

Fig. 5 is the generalized section of another embodiment of wire of inductance in the circuit board shown in Figure 4.

Embodiment

Below in conjunction with accompanying drawing, by embodiment of the present utility model is described in detail, will make the technical solution of the utility model and other beneficial effects apparent.Be appreciated that accompanying drawing only provides reference and explanation usefulness, is limited the utility model.The size that shows in the accompanying drawing only is for the ease of clear description, and does not limit proportionate relationship.

See also Fig. 1, Fig. 1 is illustrated with the situation that the motor 30 of an embodiment of the present utility model is applied in the automobile cooling fan 10.This fan 10 comprises this motor 30 and the impeller 20 that is driven by this motor 30.In the present embodiment, this motor 30 is brush motor.

See also Fig. 2 and Fig. 3, be contained in rotationally the rotor 50 in the stator 40 but this motor 30 comprises a stator 40 relative stator 40, and the two end cap 60 that is fixed in axial two ends.

Described stator 40 comprises a tubular housing 42 and the permanent magnet 44 of being located at housing 42 inwalls.

Described rotor 50 comprises iron core 52 and the commutator 53 on a rotating shaft 51, the fixed rotating shaft 51 and is wound in winding 54 on unshakable in one's determination 52.Described winding 54 is electrically connected with commutator 53.

Described two end cap 60 is fixed in the opening part at the axial two ends of housing 42, and the rotating shaft 51 of described rotor 50 is by bearing 62 supportings of being located on the end cap 60.

Please consult simultaneously Fig. 4, wherein also be fixed with a circuit board 70 on the end cap 60, be fixed with some brushes 71 on the circuit board 70.Each brush 71 is installed in the brush box 72, and brush 71 is along the radially extension of motor 30.Under the state that motor 30 assemblings are finished, commutator 53 sliding contacts of brush 71 and rotor 50.In the present embodiment, circuit board 70 roughly is square.The quantity of brush 71 is four.Brush 71 is disposing the angular direction along circuit board 70 roughly.

Also be provided with an inductance 73 on the described circuit board 70, it and roughly is set in parallel with two parallel edges of circuit board 70 between two adjacent brushes 71.Be appreciated that ground, in other embodiments, inductance 73 also can be non-parallel setting with each limit of circuit board 70.Described inductance 73 is series between the terminal (not shown) and brush 71 of motor 30.Described terminal is connected with external power source by a connector 80.

Described inductance 73 comprises a magnetic conductor 74 and is wound in wire 75 on the magnetic conductor 74.Described wire 75 comprises core and is coated on the insulating barrier of core periphery.The core of the described magnetic conductor 74 of this insulating barrier electric insulation and wire 75, and make mutually insulated between the coil turn.Described core is made of the conductor that fusing point is lower than copper.In the present embodiment, described core is aluminum steel.Described inductance 73 is connected in the circuit by modes such as welding or crimping.Preferably, described inductance 73 first crimping are connected in the circuit, weld, so that inductance 73 more stably is electrically connected in the circuit again.

Because the fusing point of aluminium is 660 ℃, far below the fusing point (1083 ℃) of copper, therefore, when the temperature of wire 75 reached 700 ℃ of left and right sides, core just can melt and cause wire 75 fusing, thereby the main circuit of motor 30 is disconnected, and prevents that motor 30 is because of overheated and on fire.

Preferably, described inductance 73 is contained in the shell 76, this shell 76 is by bakelite, or pottery, the insulation such as glass, resistant to elevated temperatures fire proofing or not combustible material make, the melted molten liquid that produces when being used for preventing wire 75 fusing of inductance 73 flies low-priced and damages other parts, and prevents or reduce the impact that other parts are subjected to high temperature wire 75.

Because the inductance 73 of motor 30 of the present utility model has the effect of overcurrent protection simultaneously concurrently; motor 30 need not additionally to arrange overcurrent protective device; the parts of motor 30 have been simplified; be that motor 30 of the present utility model is integrated into an electronic component with inductance 73 and overcurrent protective device; like this; not only reduce the cost of motor 30, also saved the space simultaneously, be conducive to the miniaturization development trend of motor 30.

Figure 5 shows that the sectional view of wire 82 of the inductance of another embodiment of the utility model motor.This wire 82 is similar to above-mentioned wire 75, also comprises a core 83 and is coated on the insulating barrier 84 of core 83 peripheries.This wire 82 is with the difference of the wire 75 of above-described embodiment: the core 83 of this wire 83 is copper-clad aluminum conductor, and namely the radially central authorities of core 83 are aluminium core 85, and the periphery of aluminium core 85 coats layer of copper layer 86.Better, the copper layer 86 shared quality of core 83 than scope between 20% to 40%.

On the one hand, the conductivity of copper and welding performance are better than aluminium; And on the other hand, the weight of aluminium and cost are lower than copper, and therefore, the core of the wire of present embodiment adopts copper-clad aluminum conductor, can obtain preferably balance between the performance of wire and cost, make its cost performance reach more excellent.In use, when the temperature of wire 82 reaches 700 ℃ of left and right sides, aluminium core 85 just can melt and form the aluminium liquid of molten condition, because the principle of expanding with heat and contract with cold, the aluminium liquid of melting breaks through copper layer 86, copper layer 86 is destroyed and form breaking point, copper layer 86 sharply increases in the resistance at breaking point place, causes temperature sharply to rise, thereby causes copper layer 86 in the whole disconnection in breaking point place, thereby cut off the main circuit of motor, prevent that motor is because of overheated and on fire.

It should be noted that; in the present embodiment; in order to make inductance possess simultaneously the function of overcurrent protection, the wire diameter of the wire 82 of inductance need to be controlled in the certain limit, make it be issued to predetermined caloric value and play the effect of overcurrent protection in predetermined situation.

To be illustrated with brush motor among the above embodiment; in fact; motor of the present utility model is not limited to brush motor; it also can be brushless electric machine; as long as motor need to arrange in the situation of inductance and overcurrent protective device; all can use design of the present utility model, inductance and overcurrent protective device are integrated into an electronic component.In addition, motor of the present utility model also is not limited only to be applied to automobile cooling fan.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims

1. motor; comprise stator, rotor and circuit board; but described rotor relative stator rotation; described circuit board relative stator is fixed; described circuit board is provided with an inductance, and described inductance comprises wire, and described wire comprises core and is coated on the insulating barrier of core periphery; it is characterized in that: described inductance possesses the function of overcurrent protective device simultaneously, and the core of described inductance is aluminum steel or copper-clad aluminum conductor.

2. motor according to claim 1, it is characterized in that: described inductance also comprises magnetic conductor, described wire is wound on the magnetic conductor.

3. motor according to claim 1, it is characterized in that: the core of described wire is copper-clad aluminum conductor, the shared quality of the copper of described copper-clad aluminum conductor than scope between 20% to 40%.

4. motor according to claim 1, it is characterized in that: described motor is brush motor.

5. motor according to claim 4, it is characterized in that: described stator comprises a housing and is located at the permanent magnet of inner walls, described rotor comprises a rotating shaft, be fixed in iron core and the commutator in the rotating shaft and be wound in winding on the iron core, and described circuit board is provided with some brushes.

6. motor according to claim 5, it is characterized in that: described circuit board is square, and described brush is four, and described brush the angular direction is disposed along described circuit board.

7. motor according to claim 1 is characterized in that: described inductance is by crimping or welding or first crimping, and the mode of rear welding is connected in the circuit.

8. according to claim 1 to the described motor of 7 any one, it is characterized in that: described inductance is contained in the shell, described shell by resistant to elevated temperatures fire proofing or not combustible material make.

9. motor according to claim 8 is characterized in that: described shell is by bakelite, or pottery, or glass is made.

10. automobile cooling fan comprises impeller and drives the motor of described vane rotary that it is characterized in that: described motor is the described motor of claim 1 to 9 any one.