JP4891656B2 - Fully enclosed motor for vehicles - Google Patents

Description

The present invention relates to a fully closed motor for a vehicle.

  In general, in railway vehicles such as trains, a fully-closed electric motor for a vehicle is mounted on a carriage disposed under the vehicle body, and the rotational force of the electric motor is transmitted to wheels via a gear device so that the vehicle travels. Yes.

  A conventional vehicular fully-closed electric motor will be described in detail with reference to the drawings. FIG. 12 is a longitudinal sectional view of a conventional fully closed motor for a vehicle.

The conventional fully-closed motor for a vehicle shown in FIG. 12 is an electric motor for a low-floor type vehicle having a limited space. Since a space is limited in a low-floor type vehicle, a method in which the electric motor 1 and a gear device (hereinafter referred to as a driving device) are directly connected is generally used. Also in the fully closed motor for a vehicle shown in FIG. 12, the main body of the fully closed motor for a vehicle and the gear device 2 (hereinafter referred to as the drive device 2) are directly connected. The fixed side of the driving device 2 is connected to the bracket 8, and the rotating side is connected by providing a coupling 3 and a coupling 4 at the tip of the shaft of the rotor 5 (rotor shaft).

  A conventional fully-closed electric motor for a vehicle is mainly composed of a stator 6 having a cooling exhaust hole 6 a on the outer peripheral portion and a rotor 5 provided on the inner peripheral side of the stator 6. A bearing device 30 is attached to one end of the stator 6 via a bracket 9, and the drive device 2 is attached to the other end of the stator 6 via a bracket 8, a coupling 3, and a coupling 4. Yes. A cooling fan 31 that rotates with the rotation of the rotor shaft and blows air is provided on the side opposite to the driving device of the bearing device 30. On the counter gear device 2 side of the cooling fan 31, an end cover 12 connected to the bracket 9 and an inlet net 13 attached to the end cover 12 are provided.

In the vehicular fully-closed electric motor configured as described above, the wind that has flowed in from the intake net 13 due to the suction force of the cooling fan 31 is made to the outside through the exhaust holes 6 a provided on the outer peripheral side of the bracket 9 and the stator 6. Exhausted.

The vehicular fully-closed electric motor configured as described above can operate normally when mounted on a railway vehicle by cooling the heat generated from the stator 6 by the wind sucked from the intake net 13. done.

12 is a fully-closed electric motor in which the internal space of the electric motor in which the stator 6 and the rotor 5 are installed is closed, so that the outside air is placed between the stator 6 and the rotor 5 or the like. There is very little possibility of dust contained therein, and maintenance can be saved compared to an open-type electric motor that cools the stator and rotor by flowing outside air into the electric motor.
JP 2004-166464 A

  However, in the conventional fully-closed electric motor for a vehicle, the heat generated from the stator 6 is radiated (cooled) by the air blown by the cooling fan 31, but the heat generated from the rotor 5 is a bearing device via the rotor shaft. Therefore, the bearing device 30 is heated to a high temperature, and the grease sealed in the bearing device 30 is also deteriorated earlier. As a result, there has been a problem that the replacement cycle of grease is shortened.

In order to solve this problem, a method of enlarging the electric motor itself is also conceivable, but in the case of an electric motor mounted on a railway vehicle, unlike an industrial electric motor, there is a large limitation on the mounting space, If the motor itself is increased in size, it cannot be installed in the vehicle, so this method cannot be employed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fully closed motor for a vehicle that can reduce the temperature of a bearing without increasing the size.

The above-described problems include a stator, a rotor disposed on the inner peripheral side of the stator, a first bracket provided on each side of the stator, and a ventilation path through which air is formed, and a second bracket, A rotor shaft supported by a bearing built in a housing provided on an inner peripheral side of the first bracket, a shielding cover connected to the inside of the housing of the housing, and a shielding cover provided on the housing ; A first ventilation hole connecting the space formed between the housing and the outside of the machine, a second ventilation hole located on the outer peripheral side of the first ventilation hole, connected to the rotor shaft, Cooling for sending air to the ventilation path formed inside the first bracket, having a ventilation hole at a position substantially the same as the first ventilation hole from the rotor shaft. It can be achieved by providing a § down.

The above-described problems include a stator, a rotor disposed on the inner peripheral side of the stator, a first bracket provided on each side of the stator, and a ventilation path through which air is formed, and a second bracket, A rotor shaft supported by a bearing built in the first bracket; a shielding cover connected to the inside of the first bracket; and a shielding cover provided on the first bracket. A first ventilation hole connecting the space formed between the bracket and the outside of the machine, a second ventilation hole located on the outer peripheral side of the first ventilation hole, connected to the rotor shaft, A cooling fan for sending air to a ventilation path formed inside the first bracket and having a ventilation hole at a position substantially the same as the first ventilation hole at a distance from the rotor shaft; It can be achieved by Rukoto.

According to the present invention, it is possible to provide a vehicular fully-closed electric motor capable of reducing the temperature of a bearing without increasing the size.

(First embodiment)
A vehicle fully enclosed motor according to a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a fully closed motor for a vehicle according to a first embodiment of the present invention.

In this specification, a space surrounded by brackets, a housing, and a stator and from which outside air does not flow is defined as inside the machine, and a space other than inside the machine is defined as outside the machine. Further, in the circumferential direction orthogonal to the axial direction, the side closer to the rotor shaft is defined as the inner circumferential side (inner diameter side), and the side farther from the rotor shaft is defined as the outer circumferential side (outer diameter side).

In the fully closed motor for a vehicle according to the first embodiment, the main body 1 and the drive device 2 of the fully closed motor for a vehicle are directly connected.

In the fully closed motor for a vehicle according to the first embodiment, a rotor 5 is provided on the inner peripheral side of the stator 6. A bracket 9 is attached to one side in the axial direction of the cylindrical stator 6 on which thin plates are laminated via an iron core retainer 6b, and a bracket 8 is attached to the other side of the stator 6 via an iron core retainer 6c. A coil 7 is accommodated in a number of grooves provided on the inner peripheral side of the stator 6. A housing 24 is attached to the inner peripheral portion of the bracket 9. An end lid 19 is attached to the inner peripheral side of the housing 24 and the side opposite to the driving device 2, and the bearing 10 is attached between the end lid 19 and the housing 24. The bracket 8 is connected to the fixed side of the drive device 2, and a partition plate 15 is connected to the inner peripheral side of the bracket 8. The rotation side of the drive device 2 is connected by providing a coupling 3 and a coupling 4 at the tip of the rotor shaft 5a. A cooling fan 11 that rotates with the rotation of the rotor shaft 5a and blows wind is provided on the side of the end lid 19 opposite to the driving device. An end cover 12 connected to the bracket 9 and an inlet net 13 attached to the end cover 12 are provided on the side of the cooling fan 11 opposite to the driving device 2.

In the vehicular fully-closed electric motor configured as described above, a shielding plate 10a having a substantially U-shaped cross section is attached to the inner side surface of the housing 24. A plurality of first ventilation holes 10c communicating with the space outside the machine are provided in the connecting portion on the outer peripheral side of the shielding plate 10a and the housing 24, and on the connecting portion on the inner peripheral side of the shielding plate 10a and the housing 24. A plurality of second ventilation holes 10b are provided on the outer peripheral side of the connection portion between the plate 10a and the housing 24, the connection portion between the bracket 9 and the housing 24, and the first ventilation hole, and the first ventilation hole 10c. Communicates with the housing 24 and the end lid 19, and the second ventilation hole 10 b communicates with the housing 24 and the bracket 9. The first ventilation hole 10c as shown in FIG. 2 are provided four on the circumference, the second ventilating hole 10b is kicked seven set on a circumference. Further, ten ventilation holes 11 a are provided on the circumference on the inner peripheral side of the cooling fan 11.

  When electric power is supplied to the vehicular fully-closed electric motor configured as described above and the electric motor is driven, the cooling fan 11 also rotates with the rotation of the rotor shaft 5 a, and the outside air flows from the intake net 13. A part of the outside air flows in the order of the bracket 9 and the air exhaust hole 6a of the stator 6 and is discharged from the fully-closed electric motor. However, a part of the outside air flows from the outer peripheral side end of the cooling fan 11 to the inner peripheral side. Flows into the second ventilation hole 10b. The outside air that has flowed into the second ventilation hole 10b flows in the space surrounded by the shielding plate 10a and the bracket 9 to the inner peripheral side, and then flows into the first ventilation hole. The outside air that has flowed into the first ventilation hole flows into the ventilation hole 11 a of the ventilation fan 11, and merges with the outside air that has newly flown from the intake net 13.

  The vehicular fully-closed electric motor configured as described above is provided with a second ventilation hole 10b penetrating the bracket 9 and the housing 2 at a connection portion between the bracket 9 and the housing 24, and air is supplied to a part of the bracket 9 and the housing 4. Since the layer is provided, the heat can be cooled by blocking a part of the heat transferred from the stator 6 and flowing outside air (first blocking means). In addition, the first ventilation hole 10c penetrating the housing 4 and the end lid 19 is provided, and the outside air flows through the first ventilation hole 10c, so that the bearing 10 can also be cooled (bearing cooling means). Further, the air in the machine that becomes hot due to the driving of the electric motor is also provided with the shielding plate 10a in the housing 24, and most of the housing 24 is not in direct contact with the air in the machine, so heat transfer from the hot air in the machine is also possible. It can be blocked (second blocking means).

  Further, since the ventilation holes 11a are also provided in the first ventilation hole 10c and the second ventilation hole 10b and the ventilation fan 11, the space surrounded by the second ventilation hole 10b and the shielding plate from the ventilation fan, the first The amount of air flowing through the ventilation hole 10c and the ventilation hole 11a of the ventilation fan is remarkably increased, and the cooling performance is greatly improved.

  The vehicular fully-closed electric motor configured as described above causes a part of the outside air to flow into the space around the bearing, and from the heat from the stator 6, the heat from the rotor 5, and the in-machine air heated by the rotor 5 and the stator 6. The heat generation path in three directions of heat is blocked by the first ventilation hole 10c, the second ventilation hole 10b, and the shielding plate 10a, thereby reducing the temperature of the bearing without increasing the size of the motor itself. I can do it.

(Second Embodiment)
A vehicle fully enclosed motor according to a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 is a longitudinal sectional view of a fully closed motor for a vehicle according to a second embodiment based on the present invention.

The fully closed motor for a vehicle of the first embodiment has a configuration in which the main body 1 of the motor and the drive device 2 are directly connected, but the fully closed motor for a vehicle of the second embodiment is driven. The difference is that it is not directly connected to the device 2.

Therefore, in the fully closed motor for a vehicle according to the second embodiment, brackets 8 and 9 are provided on both sides of the iron core retainers 6b and 6c provided at both ends of the stator 6, and a housing is provided on the inner peripheral side of the bracket 8. 33, the bracket 8 and the bracket 9, and the bearing 32 and the bearing 10 that support the rotor shaft 5a are connected.

Also in the fully closed motor for a vehicle of the present embodiment, the bracket 9 is penetrated from the circumferential end of the cooling fan 11 to the inner peripheral side (inner diameter portion) in the same manner as the fully closed motor for a vehicle of the first embodiment. Since the second ventilation hole 10b is provided and the air layer is provided in a part of the bracket 9, it is possible to cool by shutting off part of the heat transferred from the stator 6 and flowing outside air ( First blocking means). Further, the first ventilation hole 10c penetrating the bracket 9 and the end lid 19 is provided on the inner peripheral side with respect to the second ventilation hole, and the outside air also flows through the first ventilation hole 10c, so that the bearing 10 is also cooled. (Bearing cooling means) Further, the air in the machine that becomes hot due to the driving of the electric motor is also provided with the shielding plate 10a on the bracket 9, and the portion adjacent to the bearing 10 of the bracket 9 is not in direct contact with the air in the machine. The heat transfer can also be blocked (second blocking means).

  Further, since the ventilation holes 11a are also provided in the first ventilation hole 10c and the second ventilation hole 10b and the ventilation fan 11, the space surrounded by the second ventilation hole 10b and the shielding plate from the ventilation fan, the first The amount of air flowing through the ventilation hole 10c and the ventilation hole 11a of the ventilation fan is remarkably increased, and the cooling performance is greatly improved.

  Further, a part of the outside air is caused to flow through the space around the bearing, and a first three-way heat generation path including heat from the stator 6, heat from the rotor 5, and heat from the in-machine air heated by the rotor 5 and the stator 6 is first. By blocking by the ventilation hole 10c, the second ventilation hole 10b, and the shielding plate 10a, the temperature of the bearing can be reduced without increasing the size of the motor itself.

(Third embodiment)
A vehicular fully-closed electric motor according to a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5 is a partial cross-sectional view of a fully closed motor for a vehicle according to a third embodiment of the present invention. In addition, about the thing which has the same structure as what was described in FIG. 1 thru | or FIG. 4, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The fully closed motor for a vehicle according to the third embodiment of the present invention is provided with a circumferential protrusion 20a extending in the axial direction on the end lid 20 on the outer peripheral side of the second ventilation hole, It differs from the fully closed electric motor for vehicles of the first embodiment based on the present invention in that a minute space is formed between the fan 11 and the protrusion 20a.

  The vehicular fully-closed electric motor configured as described above is provided with an axially extending protrusion 20a on the outer side surface (right side surface in the drawing) of the end lid 20 on the outer peripheral side of the second ventilation hole, Since there is only a small space between the cooling fan 11 and the protrusion 20a, the outside air flowing in from the space between the cooling fan 11 and the bracket 9 is difficult to flow out directly from the ventilation hole 11a of the cooling fan 11. Thus, the outside air easily flows through the path of the second ventilation hole 10b, the space surrounded by the shielding plate 10a and the housing 24, and the first ventilation hole 10c. Therefore, the amount of ventilation in the cooling circulation path (the second ventilation hole, the space surrounded by the shielding plate 10a and the housing 24, the path of the first ventilation hole) formed around the bearing is the first and second implementations. The air flow rate increases in the form of, and the cooling performance is further improved.

  In addition, the fully-closed motor for vehicles of the present embodiment can reduce the temperature of the bearing without increasing the size of the motor itself, similarly to the fully-closed motors for vehicles of other embodiments.

(Fourth embodiment)
A vehicle fully closed motor according to a fourth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 6 is a partial cross-sectional view of a fully closed motor for a vehicle according to a fourth embodiment of the present invention. In addition, about the thing which has the same structure as what was described in FIG. 1 thru | or FIG. 5, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The fully closed electric motor for a vehicle according to the fourth embodiment of the present invention is provided with a circumferential protrusion 22a extending in the axial direction on the end cover 22 on the outer peripheral side of the second ventilation hole, and further A circumferential protrusion 21a extending in the axial direction is provided on the cooling fan 21 on the outer peripheral side of the protrusion 22a, and a minute space is formed between the cooling fan 21 and the protrusion 22a. It differs from the fully closed electric motor for vehicles of the first embodiment based on the present invention in that a minute space is formed between them.

  The vehicular fully-closed electric motor configured in this way is provided with a protrusion 22a extending in the axial direction on the outer peripheral side of the second ventilation hole, and a minute space between the cooling fan 11 and the protrusion 22a. Since there is only a minute space between the protrusion 22a and the protrusion 21a, the outside air flowing in from the space between the cooling fan 11 and the bracket 9 is difficult to flow out directly from the ventilation hole 11a of the cooling fan 11, The outside air easily flows through the second ventilation hole 10b, the space surrounded by the shielding plate 10a and the housing 24, and the path of the first ventilation hole 10c. Therefore, the amount of ventilation in the cooling circulation path (the second ventilation hole, the space surrounded by the shielding plate 10a and the housing 24, the path of the first ventilation hole) formed around the bearing is the first and second implementations. The air flow rate increases in the form of, and the cooling performance is further improved.

  In addition, the fully-closed motor for vehicles of the present embodiment can reduce the temperature of the bearing without increasing the size of the motor itself, similarly to the fully-closed motors for vehicles of other embodiments.

(Fifth embodiment)
A vehicle fully enclosed motor according to a fifth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 7A is a partial cross-sectional view of a fully closed motor for a vehicle according to a fifth embodiment of the present invention. FIG. 7B is a view taken in the direction of the arrow A in FIG. In addition, about the thing which has the same structure as what was described in FIG. 1 thru | or FIG. 6, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the fully closed electric motor for a vehicle according to the fifth embodiment of the present invention, a plurality of cooling fins 23a extending from the outer peripheral side to the inner peripheral side are arranged circumferentially on the end lid 23 (FIG. 7). (B)) is different from the fully closed electric motor for a vehicle according to the first embodiment of the present invention.

  In the fully closed motor for a vehicle configured in this way, a plurality of cooling fins 23a extending from the outer peripheral side to the inner peripheral side are arranged on the end lid 23, so that the heat generated from the bearing 10 is cooled by the cooling fins 23a. Can dissipate heat. Therefore, the cooling performance of the vehicle fully closed motor of the present embodiment is improved over the cooling performance of the vehicle fully closed motor of the first embodiment.

  In addition, the fully-closed motor for vehicles of the present embodiment can reduce the temperature of the bearing without increasing the size of the motor itself, similarly to the fully-closed motors for vehicles of other embodiments.

(Sixth embodiment)
A vehicle fully closed motor according to a sixth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 8A is a partial cross-sectional view of a fully closed motor for a vehicle according to a sixth embodiment of the present invention. FIG. 8B is a view taken in the direction of the arrow A in FIG. In addition, about the thing which has the same structure as what was described in FIG. 1 thru | or FIG. 7, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The fully-closed motor for vehicles of the sixth embodiment based on the present invention is the fifth based on the present invention in that cooling fins 24a are circumferentially provided on the side surface of the housing 24 facing the shielding plate 10a. This is different from the fully-closed motor for a vehicle of the embodiment.

  The fully closed motor for a vehicle configured in this way has cooling fins 24a provided circumferentially on the side surface of the housing 24 facing the shielding plate 10a. Therefore, the stator is driven by the outside air flowing in from the second ventilation hole. 6 and the heat transferred from the bearing 10 are dissipated. Therefore, the cooling performance of the vehicle fully closed electric motor of the present embodiment is improved over the cooling performance of the vehicle fully closed electric motor of the fifth embodiment.

  In addition, the fully-closed motor for vehicles of the present embodiment can reduce the temperature of the bearing without increasing the size of the motor itself, similarly to the fully-closed motors for vehicles of other embodiments.

(Seventh embodiment)
A vehicular fully-closed electric motor according to a seventh embodiment of the present invention will be described in detail with reference to the drawings. FIG. 9 is a partial cross-sectional view of a vehicular fully-closed electric motor according to a seventh embodiment of the present invention. In addition, about the thing which has the same structure as what was described in FIG. 1 thru | or FIG. 7, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The vehicular fully-closed electric motor according to the seventh embodiment of the present invention has the vehicular fully-closed electric motor according to the sixth embodiment in that a heat insulating material 26b is attached to the side surface of the shielding plate 26a facing the housing 26. Different from electric motor.

  The vehicular fully-closed electric motor configured as described above has the heat insulating material 26b attached to the shielding plate 26a, so that the heat from the in-machine air transferred to the bearing 10 and the housing 26 can be more efficiently blocked. Therefore, the temperature of the bearing 10 is less likely to increase in the fully closed motor for a vehicle according to the present embodiment than in the fully closed motor for a vehicle according to the first embodiment.

  The heat insulating material 26b may be attached partially (for example, circumferentially) to the side surface of the shielding plate 26a, or may be attached so as to cover the entire side surface of the shielding plate 26a facing the housing 26a.

  The vehicle fully closed motor of the present embodiment can reduce the temperature of the bearing without increasing the size of the motor itself, like the vehicle fully closed motors of the other embodiments.

(Eighth embodiment)
A vehicular fully-closed electric motor according to an eighth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 10 is a partial cross-sectional view of a vehicular fully-closed electric motor according to an eighth embodiment of the present invention. In addition, about the thing which has the same structure as what was described in FIG. 1 thru | or FIG. 9, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The vehicular fully-closed electric motor according to the eighth embodiment of the present invention is based on the present invention in that the ventilation holes 25a provided in the cooling fan 25 are inclined and a plurality of circumferentially provided cooling fans 25 are provided. This is different from the fully closed motor for a vehicle according to the third embodiment.

  In the vehicle fully closed motor configured as described above, the ventilation hole 25a is inclined, so that the wind flowing out from the first ventilation hole 10c easily hits the end of the ventilation hole 25a and hits the ventilation hole 25a. The cooling fan 25 is also cooled by the wind (fin effect), and the bearing 10 is also cooled via the cooling fan 25.

  The vehicular fully-closed electric motor configured as described above cools the bearing 10 and improves the cooling performance of the electric motor by the ventilation holes 25a.

  The vehicle fully closed motor of the present embodiment can reduce the temperature of the bearing without increasing the size of the motor itself, like the vehicle fully closed motors of the other embodiments.

(Ninth embodiment)
A vehicle fully enclosed motor according to a ninth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 11 is a partial cross-sectional view of a vehicle fully closed motor according to a ninth embodiment of the present invention. In addition, about the thing which has the same structure as what was described in FIG. 1 thru | or FIG. 10, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The fully closed motor for a vehicle of the eighth embodiment based on the present invention is that the first vent hole 10c provided in the housing 26 and the communication hole 26c communicating the outside air are provided in a circumferential shape. This is different from the fully closed motor for a vehicle according to the third embodiment based on the above.

  In the vehicular fully-closed electric motor configured as described above, the outside air flowing from between the cooling fan 11 and the bracket 9 is divided into one that flows into the second ventilation hole 10b and one that flows into the communication hole 26c. . Therefore, since the outside air which is not warmed by the heat transmitted from the stator 6 and the air in the machine joins the first ventilation hole 10c, the bearing 10 can be effectively cooled.

  The vehicle fully closed motor of the present embodiment can reduce the temperature of the bearing without increasing the size of the motor itself, like the vehicle fully closed motors of the other embodiments.

  Other embodiments of the vehicle fully enclosed motor according to the present invention include a configuration in which the draft of the cooling fan is provided on the inner peripheral side of the cooling fan blades, and a plurality of vent holes are provided on the circumference. Conceivable.

Further, in the vehicle fully enclosed electric motors of the first to ninth embodiments except for the second embodiment, the first ventilation hole and the second ventilation hole are provided in the housing. Since the same effect can be obtained with the structure in which the air hole is provided in the bracket on the inner diameter side of the main plate of the ventilation fan and the first ventilation fan is provided in the housing, this structure may be adopted.

  Although the vehicle fully closed motor of the second embodiment based on the present invention is described as having a structure in which the drive device is directly connected, the vehicle fully closed motor of the second embodiment of the present invention is described. As described above, since the same effect can be obtained even if the configuration of each embodiment is applied to a configuration in which the drive device is not directly connected directly, the present invention is not limited only to the fully-closed electric motor integrated with the drive device.

1 is a longitudinal sectional view of a fully closed motor for a vehicle according to a first embodiment of the present invention. 3 is a front view of a housing 24. FIG. 3 is a partial cross-sectional view of the cooling fan 11. FIG. It is a longitudinal cross-sectional view of the fully enclosed electric motor for vehicles of 2nd Embodiment based on this invention. It is a longitudinal cross-sectional view of the fully closed motor for vehicles of 3rd Embodiment based on this invention. It is a longitudinal cross-sectional view of the fully enclosed electric motor for vehicles of 4th Embodiment based on this invention. It is a longitudinal cross-sectional view of the fully enclosed electric motor for vehicles of 5th Embodiment based on this invention. It is a longitudinal cross-sectional view of the fully enclosed electric motor for vehicles of 6th Embodiment based on this invention. It is a longitudinal cross-sectional view of the fully closed motor for vehicles of 7th Embodiment based on this invention. It is a longitudinal view of the fully closed motor for vehicles of 8th Embodiment based on this invention. It is a longitudinal cross-sectional view of the fully enclosed electric motor for vehicles of 9th Embodiment based on this invention. It is a longitudinal cross-sectional view of the conventional fully-closed electric motor for vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric motor main body 2 Gear apparatus 3 Coupling 4 Coupling 5 Rotor 6 Stator 6a Exhaust hole 7 Coil 8 Bracket 9 Bracket 10 Bearing 10a Shielding plate 10b Ventilation hole 10c Ventilation hole 11 Cooling fan 11a Ventilation hole 12 End cover 13 Inlet net 13 Partition plate 20 End cover 20a protrusion 21 Cooling fan 22a protrusion 23 End cover 24 Housing 24a Cooling 25 Cooling fan 25a Ventilation hole 26 Housing
26c communication hole
26a shielding plate 26b heat insulating material 30 bearing 31 cooling fan

Claims (11)

A stator,
A rotor disposed on the inner peripheral side of the stator;
A first bracket provided on each side of the stator and having a ventilation passage through which air is formed, and a second bracket;
A rotor shaft supported by a bearing built in a housing provided on the inner peripheral side of the first bracket;
A shielding cover connected to the inner side of the housing ;
A first ventilation hole provided in the housing and connecting a space formed between the shielding cover and the housing and the outside of the machine, and a second ventilation hole located on the outer peripheral side from the first ventilation hole When,
Connected to the rotor shaft, and has a ventilation hole at a position substantially the same as the first ventilation hole at a distance from the rotor shaft, and sends air to the ventilation path formed in the first bracket. A fully enclosed electric motor for a vehicle, comprising a cooling fan . The second ventilation hole is provided at a position where the housing is connected to the first bracket, and a ventilation hole communicating with the second ventilation hole is formed in the first bracket. The fully-closed electric motor for a vehicle according to claim 1, wherein A ventilation hole connected to the outside of the first bracket and communicating with the first ventilation hole is formed, and is a surface facing the cooling fan and communicating with the first ventilation hole. The fully-closed electric motor for a vehicle according to claim 1, further comprising an end lid having a protrusion formed on the outer peripheral side from the air hole. And further comprising an end cover connected to the outside of the first bracket and formed with a ventilation hole communicating with the first ventilation hole, and a surface facing the end cover of the cooling fan, The fully closed motor for a vehicle according to claim 1, wherein a protrusion is formed on the outer peripheral side of the ventilation hole of the cooling fan. A ventilation hole connected to the outside of the first bracket and communicating with the first ventilation hole is formed, and is a surface facing the cooling fan and communicating with the first ventilation hole. It further includes an end lid having a projection formed on the outer peripheral side from the air hole, and a projection facing the end cover of the cooling fan, the projection being formed on the outer peripheral side of the ventilation hole of the cooling fan. The fully-closed electric motor for a vehicle according to claim 1. 6. The fully closed electric motor for a vehicle according to claim 3, wherein a plurality of cooling fins are provided on an inner peripheral side of the protrusion provided on the end cover. The vehicle according to any one of claims 1 to 6, wherein a cooling fin is connected to the housing in a space formed between the shielding cover and the housing. Fully closed electric motor. The fully-closed electric motor for vehicles according to any one of claims 1 to 7, wherein a heat insulating material is attached to a surface of the shielding cover facing the housing. The fully closed motor for a vehicle according to claim 6, wherein the cooling fin provided on the end cover is formed in a direction radiating from the rotor shaft. The said 2nd ventilation hole is more than the said 1st ventilation hole, The vehicle fully closed electric motor as described in any one of Claim 1 thru | or 9 characterized by the above-mentioned. A stator,
A rotor disposed on the inner peripheral side of the stator;
A first bracket provided on each side of the stator and having a ventilation passage through which air is formed, and a second bracket;
A rotor shaft supported by a bearing built in the first bracket;
A shielding cover connected to the inner side of the first bracket;
A first ventilation hole that is provided in the first bracket and connects a space formed between the shielding cover and the first bracket and the outside of the machine, and located on the outer peripheral side from the first ventilation hole. A second vent hole to
Connected to the rotor shaft, and has a ventilation hole at a position substantially the same as the first ventilation hole at a distance from the rotor shaft, and sends air to the ventilation path formed in the first bracket. With cooling fan
A fully-closed electric motor for vehicles, comprising:

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