CN204131359U - The brushless DC motor of internal and external pressure balance - Google Patents
The brushless DC motor of internal and external pressure balance Download PDFInfo
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- CN204131359U CN204131359U CN201420438569.1U CN201420438569U CN204131359U CN 204131359 U CN204131359 U CN 204131359U CN 201420438569 U CN201420438569 U CN 201420438569U CN 204131359 U CN204131359 U CN 204131359U
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- hollow pipe
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- rotor
- wheel hub
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Abstract
The utility model relates to the technical field of brushless DC motor, especially a kind of brushless DC motor of internal and external pressure balance, be mainly used on electric bicycle, it comprises wheel hub and is positioned at the end cap of wheel hub both sides, the end cap of described both sides all offers axis hole, the end cap of both sides and its respective axis hole place are equipped with sealant layer, stator is provided with in described wheel hub, rotor and five motor Hall lines be connected with Hall element, described rotor is arranged with three motor phase lines, five described motor Hall lines and three motor phase lines are coated with fire retardant jacket, this motor also comprises a hollow pipe, one end of described hollow pipe is fixed on the iron core of stator, the other end of hollow pipe passes along with the axis tapping of three motor phase lines from rotor.By introducing a hollow pipe between the inner chamber and the external world of motor, the air pressure of motor inner chamber is made to remain consistent with extraneous air pressure.
Description
Technical field
The utility model relates to the technical field of brushless DC motor, especially a kind of brushless DC motor of internal and external pressure balance.
Background technology
Brushless DC motor often all injects fluid sealant at end cap and axis hole place in order to waterproof, make motor chamber and extraneous isolation, but the waterproof effect of this method is limited, because motor line bag energising when run with load runs produce heat, it is external that inner air expanded by heating is extruded motor cavity from gap or sealing glue weakness, if operating motor is drenched with rain or water logging time, motor casing is cooled, air in cavity shrinks and causes negative pressure, extraneous moisture or humid air are inhaled in the cavity of motor, the phenomenon that motor causes internal corrosion or Hall element to damage because of water inlet or humidity often occurs.
Summary of the invention
The technical problems to be solved in the utility model is: in order to solve the problem proposed in above-mentioned background technology, the utility model provides a kind of brushless DC motor of internal and external pressure balance, between the inner chamber and the external world of motor, introduce a hollow pipe, make the air pressure of motor inner chamber remain consistent with extraneous air pressure.
The utility model solves the technical scheme that its technical problem adopts: a kind of brushless DC motor of internal and external pressure balance, comprise wheel hub and the end cap being positioned at wheel hub both sides, the end cap of described both sides all offers axis hole, the end cap of both sides and its respective axis hole place are equipped with sealant layer, stator is provided with in described wheel hub, rotor and five motor Hall lines be connected with Hall element, described rotor is arranged with three motor phase lines, five described motor Hall lines and three motor phase lines are coated with fire retardant jacket, this motor also comprises a hollow pipe, one end of described hollow pipe is fixed on the iron core of stator, the other end of hollow pipe passes along with the axis tapping of three motor phase lines from rotor.
In order to make the air sucked from hollow pipe be dry, namely ensure that dry air enters in the cavity of motor, therefore described hollow pipe is connected with the moisture absorption bottle of built-in drier from one end that the axis tapping of rotor passes.
Further specifically, hollow pipe is made up of glass fibre.
The beneficial effects of the utility model are: the brushless DC motor of internal and external pressure balance of the present utility model, have employed a kind of new thinking that " blocking up " and " dredging " combines, while the original fluid sealant blocking method of reservation, a hollow pipe is introduced between the inner chamber and the external world of motor, due to the existence of this hollow pipe, external through hollow pipe discharge side during air fever expansion in motor chamber, Air flow in motor chamber also sucks outside air through hollow pipe when shrinking, so, air pressure in motor chamber remains consistent with extraneous air pressure, in order to prevent the suction of humid air, the moisture absorption bottle of built-in drier is connected with from one end that the axis tapping of rotor passes at hollow pipe, the humid air sucked is removed after humidity through the drier in moisture absorption bottle and is entered in the cavity of motor again, ensure that the core stamping non-corrosive in cavity, the Hall element that it also avoid in cavity is shorted.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
In figure: 1, motor Hall line, 2, motor phase line, 3, fire retardant jacket, 4, hollow pipe, 5, drier, 6, moisture absorption bottle.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
The brushless DC motor of internal and external pressure balance as shown in Figure 1, be mainly used on electric bicycle, it comprises wheel hub and is positioned at the end cap of wheel hub both sides, the end cap of both sides all offers axis hole, the end cap of both sides and its respective axis hole place are equipped with sealant layer, stator is provided with in wheel hub, rotor and five motor Hall lines 1 be connected with Hall element, rotor is arranged with three motor phase lines 2, five motor Hall lines 1 and three motor phase lines 2 are coated with fire retardant jacket 3, this motor also comprises a hollow pipe 4 be placed in the middle of high temperature resistant wire harness, hollow pipe 4 is made up of glass fibre, one end of hollow pipe 4 is fixed on the iron core of stator, the other end of hollow pipe 4 passes along with the axis tapping of three motor phase lines 2 from rotor, one end that this hollow pipe 4 is drawn is fixed on the higher position of the vehicle frame of electric bicycle, due to the existence of this hollow pipe 4, external through hollow pipe 4 discharge side during air fever expansion in motor chamber, Air flow in motor chamber also sucks outside air through hollow pipe 4 when shrinking, so, air pressure in motor chamber remains consistent with extraneous air pressure, hollow pipe 4 makes not cause pressure reduction because cold-hot condition is different between the air pressure in cavity and the air pressure in the external world, avoid the motor chamber that is heated to meet and cold the moisture of outside to be sucked.
In order to prevent the suction of humid air, hollow pipe 4 is connected with the moisture absorption bottle 6 of built-in drier 5 from one end that the axis tapping of rotor passes, the air sucked enters in the cavity of motor after moisture removed by the drier 5 in moisture absorption bottle 6 again, namely the drier 5 in moisture absorption bottle 6 keeps the air in bottle to be in drying regime, the air that motor chamber sucks is the air of free from dampness, and then ensure that core stamping non-corrosive in cavity, the Hall element that it also avoid in cavity is shorted.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on specification, must determine its technical scope according to right.
Claims (3)
1. the brushless DC motor of an internal and external pressure balance, comprise wheel hub and the end cap being positioned at wheel hub both sides, the end cap of described both sides all offers axis hole, the end cap of both sides and its respective axis hole place are equipped with sealant layer, stator is provided with in described wheel hub, rotor and five motor Hall lines (1) be connected with Hall element, described rotor is arranged with three motor phase lines (2), five described motor Hall lines (1) and three motor phase lines (2) are coated with fire retardant jacket (3), it is characterized in that: this motor also comprises a hollow pipe (4), one end of described hollow pipe (4) is fixed on the iron core of stator, the other end of hollow pipe (4) passes from the axis tapping of rotor along with three motor phase lines (2).
2. the brushless DC motor of internal and external pressure balance according to claim 1, is characterized in that: described hollow pipe (4) is connected with the moisture absorption bottle (6) of built-in drier (5) from one end that the axis tapping of rotor passes.
3. the brushless DC motor of internal and external pressure balance according to claim 1 and 2, is characterized in that: described hollow pipe (4) is made up of glass fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420438569.1U CN204131359U (en) | 2014-08-05 | 2014-08-05 | The brushless DC motor of internal and external pressure balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420438569.1U CN204131359U (en) | 2014-08-05 | 2014-08-05 | The brushless DC motor of internal and external pressure balance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204131359U true CN204131359U (en) | 2015-01-28 |
Family
ID=52387679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420438569.1U Active CN204131359U (en) | 2014-08-05 | 2014-08-05 | The brushless DC motor of internal and external pressure balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204131359U (en) |
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2014
- 2014-08-05 CN CN201420438569.1U patent/CN204131359U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |