JP4630708B2 - Fully enclosed electric motor for vehicle drive - Google Patents

Description

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

Conventional vehicle drive motors generally take in outside air through a filter and cool the inside of the machine. However, because the filter is provided at the outside air intake port, the filter must be replaced frequently.

In order to solve the above-described problems, a fully-closed motor for driving a vehicle that has been devised will be described in detail with reference to the drawings. FIG. 23 is a front view of a fully-closed electric motor for driving a vehicle. FIG.
4 is an AO longitudinal sectional view of FIG. 25 is a B-O longitudinal view of FIG.

In a fully-closed motor for driving a vehicle that has been devised in recent years, a rotor shaft 1 is coupled to an inner peripheral portion of a rotor core 2. Each end of the rotor shaft 1 in the axial direction includes a first bearing 4 built in the first bracket 3 and a second bearing 6 built in the second bracket 5.
It is supported by each (for example, refer patent document 3).

A first ventilation fan 7 is attached to a part of the rotor shaft 1 positioned on the inner side of the bearing 4. A second ventilation fan 8 is provided on a part of the rotor shaft 1 located inside the machine relative to the bearing 6.
Is installed. The outer periphery of the first ventilation fan 7 is adjacent to the inside of the first ventilation fan 7.
The 1st shielding board 9 fixed to is provided. A minute gap on the circumference is formed between the inner peripheral surface 9 a of the central hole portion of the shielding plate 9 and the outer peripheral surface of the rotor shaft 1. Further, a second shielding plate 11 whose outer peripheral portion is fixed to the third bracket 10 is provided adjacent to the inside of the second ventilation fan 8. A minute gap on the circumference is also formed between the inner peripheral surface 11 a of the central hole portion of the shielding plate 11 and the outer peripheral surface of the rotor shaft 1. A number of grooves are provided in the outer peripheral portion of the rotor core 2, and the rotor bar 12 is accommodated in the grooves. Both end portions of each rotor bar 12 project from the rotor iron core 2 to the side, and are bound and integrated by an end ring 13 to form a cage rotor of an induction motor. A number of grooves are provided on the inner periphery of the stator core 14, and the stator coil 15 is accommodated in the grooves (stator). The coil end portions at both ends of each stator coil 15 are formed so as to protrude from the stator core 14 to the side. In the vicinity of the outer periphery of the stator core 14, a plurality of first ventilation holes 14 a and a plurality of second ventilation holes 14 b are formed so as to penetrate in the axial direction. A plurality of air inlets 3a for taking in outside air are first.
Is provided on the wall surface near the center side of the bracket 3. This air inlet 3a is connected to the first ventilation fan 7
Is located closer to the center side (smaller diameter side) than the inner diameter portion of the blade 7a. Outside of the first bracket 3 (
A first outside air ventilation path 3b for receiving cooling air from the first ventilation fan 7 is provided on the circumference on the outer periphery side) portion. The first outside air ventilation path 3b communicates with one end of the first ventilation hole 14a via the introduction path 3c. The other end of the first ventilation hole 14a is opened to the atmosphere through the exhaust hole 10c. A plurality of air inlets 5 a for taking in outside air are provided on the side surface in the vicinity of the center of the second bracket 5. The air inlet 5 a is located on the center side (smaller diameter side) than the inner diameter portion of the blade 8 a of the second ventilation fan 8. The second bracket 5 is provided with a second outside air ventilation path 10 a on the circumference for receiving the cooling air from the second ventilation fan 8, and the second outside air ventilation path 1.
0a is communicated with one end of the second ventilation hole 14b through the introduction path 10b. The other end of the second ventilation hole 14b is opened to the atmosphere by the ventilation hole 3d.

The vehicle drive fully-closed electric motor configured as described above is loaded into the carriage by fixing a stator arm 16a provided on the stator frame 16 with a carriage frame and bolts.
Then, the end of the rotor shaft extending to one end of the electric motor is connected to a drive gear device (not shown) via a joint, and the vehicle is driven by transmitting the rotational force of the electric motor from the drive gear device to the wheels.

When the vehicle drive fully-closed motor configured as described above is driven, the first ventilation fan 7 and the second ventilation fan 8 rotate. Outside air flows in from the first air inlet 3a by the first ventilation fan, and is then blown up to the first outside air ventilation passage 3b, where the introduction passage 3b and the first ventilation hole 14 are blown.
A is circulated and discharged to the air side on the non-drive side. Outside air flows in from the second air inlet 5a by the second ventilation fan 8, blows up to the second outside air ventilation path 5a, and flows through the introduction path 5b and the second ventilation hole 14b to drive the atmosphere on the drive side. Discharged to the side.

The vehicle drive fully-closed electric motor configured in this way includes both a flow path through which external air flows from the drive side to the non-drive side and a flow path through which external air flows from the non-drive side to the drive side. The inside is cooled uniformly.
JP 09-46960 A JP 2003-143809 A JP 2004-187352 A

However, when disassembling and performing maintenance on the above-described fully-enclosed fan motor, first, the second
The bolt 17 connecting the bracket 5 and the third bracket 10 is removed, and the second bracket 5 is removed. Next, the second ventilation fan 8 is removed, the bolt 18a that connects the third bracket 10 and the stator frame 16 is removed, and the third bracket 10 and the shielding plate 1 are removed.
1 is removed from the motor body. Thereafter, the stator iron core 14 is pulled out, the bolt 18c connecting the shielding plate 9 and the first bracket 3 is removed, the first bracket 3 is removed from the motor body, and the first ventilation fan 7 is removed. Become. The same procedure is followed when assembling.

Generally, in the railway industry, maintenance work such as disassembling and assembling work needs to be facilitated in order to maintain a plurality of electric motors mounted on a train of railway cars at a time.

Therefore, an object of the present invention is to provide a vehicle drive fully-closed electric motor that can facilitate maintenance work.

The above-described problems include a stator iron core, a rotor iron core disposed on the inner peripheral side of the stator iron core, a rotor shaft coupled to the center of the rotor iron core, and a first bearing that rotatably supports the rotor shaft. A second bearing for rotatably supporting the rotor shaft, a first outer peripheral bracket attached to an axial end on the drive side of the stator core, and the first bearing incorporated therein, A first inner peripheral bracket attached to an inner peripheral portion of the first outer peripheral side bracket, a second outer peripheral side bracket attached to an axial end portion of the stator iron core on the non-driving side, and the second Of the second outer peripheral bracket mounted on the inner peripheral portion of the second outer peripheral bracket, and adjacent to the machine inner side of the first bearing provided on the drive side of the rotor shaft. To install The first main plate, the first outside air blowing blade provided on the machine outside side wall surface of the first main plate, and the inside air blowing provided radially on the machine inside wall surface of the first main plate And a first labyrinth configured between the outer periphery of the first main plate and the first outer bracket, and the second bearing on the counter-drive side of the rotor shaft. A second main plate attached so as to be adjacent; a second blade for blowing outside air provided on an outer side wall surface of the second main plate; an outer peripheral portion of the second main plate; and the second A second labyrinth configured between the bracket on the outer periphery side, a plurality of ventilation holes provided in the rotor iron core and penetrating in the axial direction through the rotor iron core, an outer periphery of the stator iron core provided in the stator iron core A first ventilation hole penetrating in the axial direction in the vicinity of the stator iron core; A second vent hole provided in the vicinity of the outer periphery of the stator core in the axial direction; a first air inlet provided on the inner diameter side of the first inner peripheral bracket; and the first outer periphery. Provided on the side bracket, one end of which communicates with one end of the first ventilation hole, the other end is opened to the atmosphere, and a first outside air ventilation path through which the outside air cooling air blown by the first main plate flows. A second air inlet provided in the inner diameter side of the second inner peripheral bracket, and provided in the second outer bracket, one end of which communicates with one end of the second vent hole, The other end is open to the atmosphere, and has a second outside air ventilation path through which the outside air cooling air blown by the second main plate flows. The outer diameter of the first main plate is the outer diameter of the rotor core. Greater than the dimension and less than or equal to the outer diameter of the first inner bracket, and the second main The outer diameter dimension of the plate can be achieved by being not more than the outer diameter dimension of the rotor iron core and not less than the outer diameter dimension of the second inner peripheral side bracket.

The above-described problems include a stator iron core, a rotor iron core disposed on the inner peripheral side of the stator iron core, a rotor shaft coupled to the center of the rotor iron core, and a first bearing that rotatably supports the rotor shaft. A second bearing for rotatably supporting the rotor shaft, a first outer peripheral bracket attached to an axial end on the drive side of the stator core, and the first bearing incorporated therein, A first inner peripheral bracket attached to an inner peripheral portion of the first outer peripheral side bracket, a second outer peripheral side bracket attached to an axial end portion of the stator iron core on the non-driving side, and the second Of the second outer peripheral bracket mounted on the inner peripheral portion of the second outer peripheral bracket, and adjacent to the machine inner side of the first bearing provided on the drive side of the rotor shaft. To install The first main plate, the first outside air blowing blade provided on the machine outside side wall surface of the first main plate, and the inside air blowing provided radially on the machine inside side wall surface of the first main plate An inner side of the second bearing on the counter-drive side of the rotor shaft, and a first labyrinth formed between the outer blade, the outer periphery of the first main plate and the first outer bracket A second main plate attached adjacent to the second main plate, a second air blower blade provided on the machine outer side wall surface of the second main plate, and a radial surface on the machine inner side wall surface of the second main plate A second labyrinth formed between the outer peripheral portion of the second main plate and the second outer peripheral bracket, and the rotor iron core in the axial direction. A plurality of ventilation holes extending therethrough, provided in the stator iron core, A first ventilation hole penetrating in the axial direction in the vicinity of the circumference, a first air inlet provided on the inner diameter side of the first inner peripheral bracket, and provided outside the fully-closed electric motor for driving the vehicle. A cooler having an internal air duct extending in the axial direction and an external air duct extending in the axial direction, and one end of the cooler provided on the first outer peripheral bracket.
The first outside air passage is communicated with one end of the ventilation hole, the other end is open to the atmosphere, and the outside air cooling air blown by the first main plate flows, and the inner diameter side of the second inner circumference side bracket The outer diameter dimension of the second air inlet provided in the first main plate and the outer diameter dimension of the rotor core and not more than the outer diameter dimension of the first inner bracket, The outer diameter of the second main plate is equal to or smaller than the outer diameter of the rotor core and equal to or larger than the outer diameter of the second inner peripheral bracket, and one end of the internal air passage of the cooler is driven. The other end of the cooler's internal air passage is in communication with the counter-drive-side internal space, and one end of the cooler's external air passage is connected to the second outer periphery. The other outside air passage is communicated with the second outside air passage provided in the side bracket, and the other end of the outside air passage is opened to the atmosphere. It can be achieved by having the Being, and cooling fins provided on the inner wall surface and outer wall surface of the outside air wind path of the cooling device and the internal air wind path of the cooling device.

According to the present invention, it is possible to provide a vehicle drive fully-closed electric motor capable of facilitating maintenance work.

(First embodiment)
A vehicle drive fully-closed electric motor according to a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a fully closed motor for driving a vehicle according to a first embodiment of the present invention. FIG. 2 is an AO longitudinal sectional view of FIG. 3 is a B-O longitudinal view of FIG. 4 is a longitudinal sectional view taken along line C-O in FIG. FIG. 5 is a DD longitudinal sectional view of FIG. FIG. 6 is a front view of the first ventilation fan of the vehicle drive fully-closed electric motor according to the first embodiment of the present invention. FIG. 7 is a front view of the second ventilation fan of the vehicle drive fully-closed electric motor according to the first embodiment of the present invention. FIG. 8 is a configuration diagram of the vehicle drive fully-closed electric motor according to the first embodiment of the present invention in an exploded state. In addition, about the thing same as what was described in FIG. 15 thru | or FIG. 17, the same code | symbol is attached | subjected and description is abbreviate | omitted, and the flow of air is simply shown by the arrow in the figure.

In the vehicle drive fully-closed electric motor according to the first embodiment of the present invention, the first outer peripheral bracket 21 is attached to the axial drive side end of the stator core 14 via the stator frame 16. A first bearing 4 having a built-in first bearing 4 is provided in the inner peripheral portion of the outer peripheral bracket 21.
The inner peripheral side bracket 22 is attached by a bolt 27a. Second outer peripheral bracket 2
3 is attached to the non-driving side end of the stator core 14. This second outer peripheral bracket 2
3, a second inner peripheral bracket 24 incorporating the second bearing 6 is attached by bolts 27b. The first ventilation fan 25 is attached adjacent to the first bearing 4 at the machine-inside position of the first bearing at the drive side end of the rotor shaft 1. The second ventilation fan 26 is attached adjacent to the second bearing at the machine-inside position of the second bearing at the non-driving side end.

In the vehicle drive fully-closed electric motor configured as described above, in the vicinity of the inner periphery of the rotor core 2,
A plurality of ventilation holes 2 b penetrating in the axial direction are formed, and ventilation holes are also provided in the iron core retainers attached to both ends of the rotor iron core 2.

A plurality of blades 25 c are arranged radially on the outer side surface of the main plate 25 a of the first ventilation fan 25. A plurality of blades 25c are arranged radially on the inner side surface of the main plate 25a. A plurality of blades 26 b are arranged radially on the outer surface of the main plate 26 a of the second ventilation fan 26. A plurality of fins 26c are provided on the inner surface of the main plate 26a. The number of blades 25b of the first ventilation fan 25 and the number of blades 26b of the second ventilation fan 26 are preferably set to different numbers such as 15:13, and further set to numbers that are not divisible by each other. The fins 26c provided on the inner side of the second ventilation fan 26 are arranged so as not to inhibit the circulation of the inside air substantially parallel to the circumferential direction so that the fin action due to the rotation is difficult to occur.

The first labyrinth 25d is a narrow gap in which the outer peripheral portion of the main plate 25a of the first ventilation fan 25 and the first outer peripheral bracket 21 are inserted into each other in the axial direction (when they come into contact with each other) Because it burns out by rotation). Similarly to the labyrinth 25a, the second labyrinth 26d is a narrow gap formed by the outer peripheral portion of the main plate 26a of the second ventilation fan 26 and the second outer peripheral side bracket 23 entering each other in the axial direction.

The outer diameter of the first ventilation fan 25 is larger than the outer diameter of the rotor core 2 and smaller than the assembly fitting diameter of the first outer peripheral side bracket 21 and the first inner peripheral side bracket 22, so The outer diameter of the fan 26 is smaller than the outer diameter of the rotor iron core 2 and larger than the assembly fitting diameter of the second outer peripheral bracket 23 and the second inner peripheral bracket 24.

In the vicinity of the outer periphery of the stator core 14, the first ventilation hole 14 a and the second ventilation hole 14 a are formed so as to penetrate in the axial direction.
A plurality of ventilation holes 14b and a plurality of third ventilation holes 14c are formed.

In the vehicle drive fully-closed electric motor configured as described above, the first air inlet 22a has the first inlet 22a.
A plurality of the inner peripheral brackets 22 are provided at positions closer to the inner peripheral side than the blades 25 b provided on the outer side of the first ventilation fan 25. The first outside air ventilation path 21 a that receives the cooling outside air sent by the blades 25 b outside the first ventilation fan 25 is provided on the first outer peripheral side bracket 21 on the circumference. The first outside air ventilation path 21a has an introduction path 21 at one end of the first ventilation hole 14a.
The other end of the first ventilation hole 14a is open to the atmosphere. A plurality of second air inlets 24 a are provided at positions closer to the inner diameter side than the blades 26 b of the second ventilation fan 26 of the second inner peripheral bracket 24. The second outside air ventilation path 23a that receives the cooling outside air sent by the blades 26b of the second ventilation fan 26 is provided on the circumference of the second outer peripheral side bracket. The second outside air ventilation path communicates with one end of the second ventilation hole 14b through the introduction path 23b, and the other end of the second ventilation hole is open to the atmosphere. One end of the third ventilation hole 14c is the first
Is communicated with the interior space on the drive side via an internal airflow passage 21c provided in the outer peripheral bracket 21. The other end of the third ventilation hole 14c is an internal airflow passage 23c provided in the second outer peripheral bracket 23.
Is communicated with the interior space on the opposite drive side.

When the vehicle drive fully-closed motor configured as described above is driven, the first ventilation fan 25 and the second ventilation fan 26 rotate. Along with this, the blade 25b also rotates, and the outside air flows in from the first inlet 22a by the fan action, and then blown up to the first outside air passage 21a and circulates through the introduction passage 21b and the first ventilation hole 14a. And discharged to the air side on the non-drive side. Second
With the rotation of the ventilation fan 26, the blades 26b also rotate, and by the fan action, the outside air flows in from the second inlet 24a and is blown up to the second outside air ventilation path 23a.
Through the ventilation hole 14b and discharged to the drive side atmosphere side.

Further, after the inside air is blown up to the outer peripheral space in the driving side machine by the fan action of the blade 25c inside the first ventilation fan 25, it flows into the third ventilation hole 14c through the inner airflow passage 21c. The inside air that has circulated through the third ventilation hole 14 c flows into the in-machine space on the counter-drive side via the inner air flow passage 23 c, and further on the circumference between the ventilation hole 2 a of the rotor core 2, the rotor core 2, and the stator core 14. Circulates and circulates so as to return to the circumferential portion of the blade 25c inside the machine of the first ventilation fan 25.

When carrying out maintenance of the vehicle drive fully-closed electric motor configured as described above, a dedicated suspension tool 27 is attached to the rotor shaft end 6a, and the center of gravity of the rotor is suspended by a crane or the like. Then, by simply removing the fastening bolts 27a and the fastening bolts 27b of the outer peripheral bracket 21 and the outer peripheral bracket 23, the inner peripheral bracket 22 and the inner peripheral bracket 24 on both sides, the entire rotor is pulled out to the drive side. Next, the first inner peripheral bracket 22, the first ventilation fan 25, and the like are removed from the rotor shaft 1.

In the vehicle drive fully-closed electric motor configured as described above, the conventional shielding plate and the ventilation fan 7,
Since only the ventilation fans 25 and 26 are the members that are required to be 8 and 2, disassembling work is simplified.

The vehicle-drive fully-closed electric motor configured in this way has improved cooling performance and a groove in the outer diameter of the ventilation fans 25 and 26 because the ventilation fan directly contacts the inside air.
Since the labyrinth structure is in the shape of a letter 5, the entire rotor can be pulled out from one direction, and maintenance work such as disassembly and assembly work can be facilitated.

As described above, in the vehicle drive fully-closed electric motor according to the first embodiment, the cooling outside air blown by the first ventilation fan 25 and the second ventilation fan 26 provided on both end sides in the axial direction is the outer bracket. 21 and 23 and the inside of the first ventilation hole 14a and the second ventilation hole 14b of the stator iron core are circulated and cooled, so that the cooling area of the entire motor is increased and the cooling performance is improved.

Further, since the ventilation fans on both sides are attached to the inside of the bearing, the heat transmitted from the rotor core 2 to the bearing 4 and the bearing 6 via the rotor shaft 1 is transmitted to the ventilation fan 25 and the ventilation fan 26.
Cooled by. Therefore, the heat transmitted to the bearing 4 and the bearing 6 is suppressed, and the temperature rise is further reduced.

Since the main plate 25a of the first ventilation fan 25 and the main plate 26a of the second ventilation fan 26 are in direct contact with the inside air, when the inside air is circulated and cooled, the blades 25c of the first ventilation fan 25 and the second plate 25a The fins 26c of the second ventilation fan 26 function as heat absorption fins. First ventilation fan 2
5 blades 25b and the blades 26b of the second ventilation fan 26 are blades 2 of the first ventilation fan 25.
5c and the fins 26c of the second ventilation fan 26 forcibly radiate the heat absorbed from the inside air to the outside air. Therefore, cooling of the inside air is further promoted.

The main plate 25a of the first ventilation fan 25 and the main plate 26a of the second ventilation fan 26 are directly attached in close contact with the rotor core restraint at both ends of the rotor core 2, so that the heat transfer of the rotor core 2 is good. Since the heat is dissipated by the ventilation fans 25 and 26, the cooling of the rotor is further improved.

The vehicle drive fully-closed electric motor configured as described above can facilitate maintenance work.

(Second Embodiment)
A vehicle drive fully-closed electric motor according to a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 9 is a longitudinal sectional view of a vehicle drive fully-closed electric motor according to a second embodiment of the present invention. FIG. 10 is a partial front view of a fully-driving motor for driving a vehicle according to a second embodiment of the present invention. The same structural elements as those shown in FIGS. 1 to 8 are designated by the same reference numerals and the description thereof is omitted.

In the vehicle drive fully-closed electric motor according to the second embodiment of the present invention, the drive-side first outer peripheral bracket 28 receives the outer air blown by the blades 25b of the first ventilation fan 25. An upper first outside air passage 28a is formed. One end of the first ventilation hole 14a communicates with the first outside air ventilation path 28a via the introduction path 28b, and the other end of the first ventilation hole 14a is open to the atmosphere. A portion of the first outer peripheral bracket 28 on the inner circumference of the machine
Inside air introduction path 2 for receiving inside air blown by the blades 25c inside the machine of the ventilation fan 25
8c is formed, and one end of the inside air introduction path opens toward the outside of the apparatus.

A second outside air ventilation path 29 a on the circumference for receiving outside air blown by the second ventilation fan 26 is formed in the second outer peripheral side bracket 29 on the counter driving side. Second ventilation hole 14
One end of b communicates with the second outside air ventilation path 29a via the introduction path 29b, and the second ventilation hole 14 is connected.
The other end of b is open to the atmosphere. An inside air introduction path 29c is formed in the second outer peripheral side bracket 29 to communicate the non-driving side in-machine space with the outside space.

The cooler 30 is mounted outside the vehicle drive fully-closed electric motor configured as described above, and this cooler is provided on the cooling air passage 30b extending from the driving side to the non-driving side, and on the inner peripheral wall surface of the cooling air passage 30b. It consists of a number of heat-absorbing fins 30d provided along the longitudinal direction and a number of heat-radiating fins 30e provided so as to be perpendicular to the outer peripheral wall surface of the cooling air passage, and both ends of the cooling air passage 30b are connected to the inside air inlet 30a. The inside air outlet 30c communicates with the inside air introduction path 28c provided in the first outer periphery side bracket 28 and the inside air inflow path 29c provided in the second outer periphery side bracket 29, respectively.

The first ventilation fan 25 is rotated by the operation of the vehicle drive fully-closed electric motor configured as described above. By the rotation of the ventilation fan 25, the cooled outside air flows into the first ventilation hole 14 a through the first outside air ventilation path 28 a and the introduction path 28 b, and is discharged outside the machine on the non-driving side. Further, along with the operation of the vehicle drive fully-closed electric motor, due to the rotation of the second ventilation fan 26, the cooling outside air flows from the second outside air ventilation path 29a through the introduction path 29b into the second ventilation hole 14b, Second
After being circulated through the ventilation hole 14b, it is discharged to the outside of the drive side machine. Further, the first ventilation fan 25
The inside air blown up by the machine inner blades 25c enters the cooling air passage 30b of the cooler 30 from the inside air introduction passage 28c, circulates through the cooling air passage 30b, and then passes from the inner air passage 29c to the in-machine space on the non-drive side. Inflow. The inside air that has flowed into the machine on the non-drive side flows through the air gaps 2a of the rotor core, the air gap between the rotor iron core 2 and the stator iron core 14, and the inside of the blades 25c inside the machine of the first ventilation fan 25. It flows into the circumferential space. In this way, the inside air circulates through the in-machine space and the cooler space.

When carrying out maintenance of the vehicle drive fully-closed electric motor configured as described above, a dedicated suspension tool 27 is attached to the rotor shaft end 6a, and the center of gravity of the rotor is suspended by a crane or the like. Then, only by removing the fastening bolts 27a and the fastening bolts 27b of the outer peripheral bracket and the inner peripheral bracket on both sides, the entire rotor is pulled out to the drive side. Next, the first inner peripheral bracket 22, the first ventilation fan 25, and the like are removed from the rotor shaft 1. When the cooler 30 is cleaned, it is removed from the outer bracket 25 and the outer bracket 26.

Since the vehicle drive fully-closed electric motor configured as described above includes the cooler 30, the cooling performance is improved, and a groove is provided on the outer diameter of the ventilation fans 25 and 26, so that the labyrinth structure is formed in a five-character shape. Therefore, the entire rotor can be pulled out from one direction. Furthermore, since the cooler is provided outside the machine, disassembly and assembly can be facilitated.

In the vehicle drive fully-closed electric motor configured as described above, the internal heat of the motor circulates through the inside of the cooler provided outside the machine, and the heat absorbing fins 3 provided inside and outside the cooling air passage of the cooler 30.
The heat of the inside air can be released to the outside air by 0d and the radiation fins 30e, so that the cooling performance of the inside air is greatly improved, and accordingly, the cooling performance of each part in the machine is also improved. Since the heat dissipating fins 30e of the cooler 30 are arranged substantially parallel to the traveling direction of the vehicle, the traveling air during the travel of the vehicle surely circulates between the heat dissipating fins 30e. Done effectively.

(Third embodiment)
A vehicle drive fully-closed electric motor according to a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 11 is a longitudinal sectional view of a vehicle drive fully-closed electric motor according to a third embodiment of the present invention. The same structural elements as those shown in FIGS. 1 to 10 are denoted by the same reference numerals and description thereof is omitted.

In the fully closed motor for driving a vehicle according to the third embodiment of the present invention, the stator core 1
A plurality of first ventilation holes 14a and a plurality of second ventilation holes 14b are formed in the vicinity of the outer periphery of
The ventilation fan 33 and the second ventilation fan 36 are provided, and the outside air is circulated through the first ventilation hole and the second ventilation hole by the rotation of each ventilation fan. A plurality of blades 33a provided on the inner side are formed so as to be close to the rotor core presser 35 by extending the inner end of the guide 33b on the circumference. A rib 36b for cooling the inside air is formed on the inner wall surface of the second ventilation fan 36, and the blade 3 is disposed on the outer diameter side of the rib 36b.
6C is attached, and the rib 36b transfers the heat of the inside air to the second ventilation fan 36.

By operating the fully-closed electric motor for driving the vehicle, the inside air is blown up to the outer peripheral side by the rotation of the blades 33a, and then flows through a circumferential gap between the outer periphery of the rotor core 2 and the inner periphery of the stator core 14. It circulates and circulates along a route that returns to the inner diameter space of the blade 33a of the ventilation fan. The heat of the circulated inside air is transferred to the inner side walls of the ventilation fan 33 and the ventilation fan 36 and the blades on the outside of the machine from the blades 33a and is forcibly radiated to the outside air side. Is cooled. Further, since the blades 36c also rotate with the operation of the electric motor, the air in the labyrinth 36d flows from the inside of the machine to the outside of the machine.

In the case of the vehicle drive fully-closed electric motors according to the first to second embodiments of the present invention, the air pressure in the in-flight space near the second labyrinth 26d provided on the non-driving side is low, and the second labyrinth Since the air pressure in the space outside the aircraft near 26d is high, there is a possibility that dust may flow from the space outside the aircraft. However, in the vehicle drive fully-closed electric motor of the present embodiment, the blade 33a provided in the machine
Since the smaller blades 36c are provided in the vicinity of the labyrinth 36d, it is possible to prevent dust and dirt contained in the outside air from entering the machine.

The vehicle drive fully-closed electric motor configured as described above has improved cooling performance because the ventilation fan is in direct contact with the inside air. Further, by providing the blades in the vicinity of the labyrinth 36d, the flow direction of the air in the labyrinth 36d can be changed from the inside air side to the outside air side, so that the maintenance work can be simplified.

Further, in the fully-driving electric motor for driving the vehicle according to the present embodiment, since the structure of the labyrinth 36d and the labyrinth 33d is a five-letter shape, the entire rotor can be pulled out from one direction. Maintenance work can be facilitated.

Furthermore, since the dust flowing into the machine can be reduced, the maintenance cycle can be extended.

(Fourth embodiment)
A fully driven electric motor for driving a vehicle according to a fourth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 12 is a longitudinal sectional view of a vehicle drive fully-closed electric motor according to a fourth embodiment of the present invention. 13 is a cross-sectional view taken along line EE in FIG. Note that the same structural elements as those described in FIGS. 1 to 11 are denoted by the same reference numerals and description thereof is omitted.

In the vehicle drive fully-closed electric motor according to the fourth embodiment of the present invention, the second on the non-drive side
An inside air inflow passage 37 a is formed on the inner side of the outer peripheral side bracket 37, and a second outside air ventilation passage 37 b is formed on the outer periphery side of the second ventilation fan 26. The outside air introduction path 37c communicates with the outside air ventilation path 37b and the outside space. A cooler 38 is attached to the outside of the machine, and an outside air air passage 38e is formed at the center of the cooler, and an inside air air passage 38b is formed so as to surround the outside air air passage 38e. One end of the inside air wind tunnel 38b communicates with the inside air inlet 38a and the inside air introduction path 28c, and the other end of the inside air wind path 38b communicates with the inside air outlet 28c and the inside air introduction path 37a. Open air wind path 38
One end of e communicates with the second outside air passage 37b and the outside air introduction path via the outside air inlet 38d,
The other end of the outside air passage 38e is opened to the external standby side on the driving side. A plurality of heat radiation fins 39a are provided along the longitudinal direction on the inner wall surface of the outside air wind tunnel 38e, and a plurality of heat absorption fins 39b and heat absorption fins 39c are provided along the longitudinal direction on the inner wall surface of the inside air wind tunnel 38b. A large number of heat dissipating fins 39d are provided on the outer wall surface of the outer periphery in a direction perpendicular to the longitudinal direction.

When the vehicle drive fully-closed electric motor configured as described above is operated, the first ventilation fan 25 cools the outside air through a plurality of ventilation holes in the vicinity of the outer periphery of the stator core, and at the same time, the inside air is an inside air introduction hole. 28c flows from the inside air inlet 38a of the cooler into the inside air air passage 38b, and flows from the inside air outlet 38c flowing through the inside air air passage 38b through the internal air inlet passage 37a to the in-machine space on the non-driving side, and the ventilation hole of the rotor iron core Is circulated and circulated through a path returning to the inner diameter of the blade inside the first ventilation fan.

Further, by the rotation of the second circulation fan 26, the outside air flows through the ventilation holes in the vicinity of the outer periphery of the stator core 14 for cooling, and at the same time, a part of the outside air flows from the outside air inlet 38d of the outside air introduction passage 37c. 38e and flows through the outside air passage 38e, and then is discharged from the outside air outlet 38f to the drive side external space.

Therefore, when the circulating internal air flows through the cooler's internal air path 38b, the heat of the internal air is released to the external air flowing through the external air path 38e on the inner peripheral side and the outdoor air running wind flowing through the outer space on the outer peripheral side, The circulating air is cooled efficiently.

A large number of radiating fins 39b and radiating fins 39c are provided on the inner wall of the inside air duct 38b.
A large number of radiating fins 39a are provided on the inner wall of the outside air air passage 38e, and a plurality of radiating fins 39d are provided on the outer surface of the inside air air passage 38b, so that the heat of the inside air is effectively released to the outside air. Cooling is further improved. As the cooling of the circulating air is improved, the cooling of each part in the machine is further improved.

In the vehicle-driving fully-closed electric motor configured as described above, the blades 25c provided in the machine
By providing smaller blades 26e in the vicinity of the labyrinth 26d, it is possible to prevent dust and dirt contained in the outside air from entering the machine (dust inflow prevention means).

Also in the fully-closed electric motor for driving the vehicle of the present embodiment, the structure of the labyrinth 26d is 5
The entire rotor can be pulled out from one direction and maintenance work such as disassembly and assembly work can be facilitated.

Furthermore, since the dust flowing into the machine can be reduced, the maintenance cycle can be extended.

(Fifth embodiment)
A vehicle drive fully-closed electric motor according to a fifth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 14 is a cross-sectional view of the labyrinth of the vehicle drive fully-closed electric motor according to the fifth embodiment of the present invention. The same structural elements as those shown in FIGS. 1 to 13 are denoted by the same reference numerals and description thereof is omitted.

The labyrinth 26e formed between the second ventilation fan 26 and the second outer peripheral side bracket 23 of the vehicle drive fully-closed electric motor according to the fifth embodiment of the present invention has an E-shaped groove formed between them. It is a narrow gap configured to enter each other in the axial direction (dust inflow prevention means).

Since the vehicle drive fully-closed electric motor configured as described above has a combination of a plurality of labyrinths of the vehicle drive fully-closed electric motor of the first embodiment based on the present invention, dust and dirt mixed into the outside air are not generated. Difficult to flow into the aircraft.

The vehicle drive fully-closed electric motor configured as described above can prevent dust and dirt contained in the outside air from flowing into the apparatus, thereby reducing maintenance work.

Further, in the vehicle drive fully-closed electric motor according to the present embodiment, the fitting portion of the outer peripheral bracket 23 and the ventilation fan 26 has a shape combining E-shaped grooves, so that the entire rotor is pulled out from one direction. Therefore, disassembly and assembly work can be facilitated.

In addition, since the dust flowing into the machine can be reduced, the maintenance cycle can be extended.

In the fully closed electric motors of the first to fifth embodiments based on the present invention, the first outer peripheral side bracket and the first inner peripheral side bracket are described as being provided on the drive side. However, it may be provided on the non-driving side.

Although the vehicle drive fully-closed electric motors according to the first to fifth embodiments of the present invention mainly have an induction motor structure, it is needless to say that a synchronous motor or a permanent magnet motor may be used.

(Sixth embodiment)
A vehicle drive fully-closed electric motor according to a sixth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 15 is a longitudinal sectional view of a vehicle drive fully-closed electric motor according to a sixth embodiment of the present invention. FIG. 16 is a cross-sectional view of a labyrinth portion of a vehicle drive fully-closed electric motor according to a sixth embodiment of the present invention. Components identical to those described in FIGS. 1 to 14 are designated by the same reference numerals and description thereof is omitted.

A vehicle drive fully-closed electric motor according to a sixth embodiment of the present invention includes a stator frame 41.
A bracket 40 with a built-in bearing 4 and a bracket 41 with a built-in bearing 6 are attached to both ends in the longitudinal direction. A cylindrical stator core 44 is attached to the inner peripheral side of the stator frame 41, and a plurality of stator coils 15 are housed in grooves on the inner peripheral side of the stator core 44. A rotor iron core 43 is attached to the central portion of the rotor shaft 1. The machine inner end 41e of the labyrinth part 26d of the stator frame 41a is formed so as to project over the entire circumference so as to cover the outer circumferential surface of the plurality of blades 26e.

During the operation of the electric motor, the space inside the counter drive side becomes negative pressure, and the outside air tends to flow into the machine from the labyrinth part 26d, but the inside air is raised by the rotation of the blade (fin) 26e provided on the machine inner wall surface of the cooling fan. In order to pressurize the labyrinth portion 26d of the labyrinth portion 26d and pressurize the labyrinth end of the labyrinth 26d, the labyrinth portion 26d blocks the outside air from flowing into the labyrinth from the outer end portion of the labyrinth 26d, and dust, moisture, etc. mixed in the outside air Will not flow into the cabin.

The vehicle drive fully-closed electric motor configured in this way allows dust and dirt contained in the outside air to enter the machine by providing a blade 26e smaller than the blade 25c provided in the machine in the vicinity of the labyrinth 26d. (Dust inflow prevention means) can be prevented. Further, since the projecting portion 41e of the stator frame covers the outer peripheral portion of the blade 26e, the labyrinth portion can be pressurized by the blade 26e without being affected by the internal circulation flow.

Since the fully closed electric motor of the present embodiment can reduce dust flowing into the machine, the maintenance cycle can be extended.

In the vehicle drive fully-closed electric motor according to the present embodiment, the entire rotor can be pulled out from one direction, so that maintenance work such as disassembly and assembly work can be facilitated.

(Seventh embodiment)
A vehicle drive fully-closed electric motor according to a seventh embodiment of the present invention will be described in detail with reference to the drawings. FIG. 17 is a cross-sectional view of a labyrinth portion of a vehicle drive fully-closed electric motor according to a seventh embodiment of the present invention. FIG. 18 is a cross-sectional view of a labyrinth portion of a modification of the vehicle drive fully-closed electric motor according to the seventh embodiment of the present invention. The same structural elements as those shown in FIGS. 1 to 16 are denoted by the same reference numerals and description thereof is omitted.

A fully-closed motor for driving a vehicle according to a seventh embodiment of the present invention is provided with a circumferential space 45c in the labyrinth portion 26d of the main plate 45 of the counter-drive side ventilation fan, and the main plate 45 has a plurality of drafts 45b. Is radiated radially on the circumference. The inner diameter side end of the ventilation hole 45b communicates with the interior space, and the outer end communicates with the circumferential space 45c.

During operation of the vehicle drive fully-closed motor configured as described above, a fan action is generated in the ventilation hole 45b with the rotation of the main plate 45 of the ventilation fan, and the inside air is blown up by the ventilation hole 45b.
The space 45c on the circumference is pressurized. The pressure in the pressurized circumferential space is the labyrinth portion 26d.
It is pushed out into the interior space and the exterior space.

For this reason, from the labyrinth portion 26d, the inflow of air to the inside of the machine is blocked by the inside air pushed out from the circumferential space 45c, and dust moisture mixed in the outside air does not enter the inside of the machine.

In the vehicle drive fully-closed electric motor according to the present embodiment, the entire rotor can be pulled out from one direction, so that maintenance work such as disassembly and assembly work can be facilitated.

FIG. 18 shows a modification of the vehicle drive fully-closed electric motor according to the seventh embodiment of the present invention. 18 is a labyrinth portion 26d in the space 45c on the circumference.
And a plurality of ventilation holes 45c are provided to be inclined so that the in-machine space and the circumferential space 45c communicate with each other.

In the vehicle drive fully-closed electric motor configured as described above, the position of the space 45c on the circumference to be pressurized is close to the outer end of the labyrinth portion 26d, so that the outside air is in the labyrinth portion 26.
The effect of preventing entry from d is improved.

In the vehicle drive fully-closed electric motor according to the present embodiment, the entire rotor can be pulled out from one direction, so that maintenance work such as disassembly and assembly work can be facilitated.

(Eighth embodiment)
A vehicle drive fully-closed electric motor according to an eighth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 19 is a cross-sectional view of a labyrinth portion of a vehicle drive fully-closed electric motor according to an eighth embodiment of the present invention. The same structural elements as those shown in FIGS. 1 to 18 are denoted by the same reference numerals, and description thereof is omitted.

The fully closed motor for driving a vehicle according to the eighth embodiment of the present invention is a cooling fan 2 on the drive side.
The outer peripheral portion of the main plate 25a of 5 forms a labyrinth portion 25d in opposition to the bracket 40, the blade 25b is provided on the outer surface of the main plate 25a, and the blade 25c is provided on the inner surface of the main plate 25a of the cooling fan 25. It is. An inboard side end 40a of the labyrinth portion 25d of the bracket 40 protrudes inward from the inboard side wall surface of the cooling fan main plate 40a.

When the vehicle drive fully-closed electric motor configured as described above is operated, the main plate 25a of the ventilation fan is used.
As the blades 25b rotate, the outside air is blown in the outer circumferential direction, and even when trying to enter the labyrinth portion from the outside end of the labyrinth portion 25d, the labyrinth portion 2 is caused by the inside air.
Since the inside of 5d is pressurized, intrusion of outside air into the machine is prevented, and intrusion of dust, moisture, etc. does not occur.

In the vehicle drive fully-closed electric motor according to the present embodiment, the entire rotor can be pulled out from one direction, so that maintenance work such as disassembly and assembly work can be facilitated.

(Ninth embodiment)
A vehicle drive fully-closed electric motor according to a ninth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 20 is a cross-sectional view of the labyrinth portion of the vehicle drive fully-closed electric motor according to the ninth embodiment of the present invention. The same structural elements as those shown in FIG. 1 to FIG.

In the vehicle drive fully-closed electric motor according to the ninth embodiment of the present invention, the outer peripheral portion of the main plate 47 of the cooling fan on the driving side opposes the bracket 40 to form a labyrinth 25d on the circumference. A blade 47a is provided on the outer surface of the machine. In addition, the labyrinth 25 at the outer peripheral portion of the main plate 27
A notch 37b is provided in a part forming d.

When the vehicle drive fully-closed electric motor configured as described above is operated, the main plate 25a of the ventilation fan is used.
With this rotation, the notch 47b also rotates to produce a fan action, the inside air is pushed upward, and the upper side of the labyrinth portion 25d is pressurized. Therefore, even when outside air is blown in the outer peripheral direction and attempts to enter the labyrinth part from the outside end of the labyrinth part 25d, the inside of the labyrinth part 25d is pressurized by the inside air, so the outside air is prevented from entering the machine. Dust and moisture do not enter the machine.

In the vehicle drive fully-closed electric motor according to the present embodiment, the entire rotor can be pulled out from one direction, so that maintenance work such as disassembly and assembly work can be facilitated.

(Tenth embodiment)
A vehicle drive fully-closed electric motor according to a tenth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 21 is a longitudinal sectional view of a vehicle drive fully-closed electric motor according to a tenth embodiment of the present invention. FIG. 22 is a cross-sectional view of the labyrinth portion of the vehicle drive fully-closed electric motor according to the tenth embodiment of the present invention. The same structural elements as those shown in FIG. 1 to FIG.

In the vehicle drive fully-closed electric motor according to the tenth embodiment of the present invention, a circumferential air chamber 48c is provided at the center of the labyrinth provided on the non-drive side, and is further fixed to the stator frame 48. The instructed pressure introduction pipe 49 communicates with the air chamber 48c on the circumference and the in-machine space on the driving side.

During operation of the vehicle drive fully-closed electric motor configured as described above, the drive side cooling fan 25 is operated.
The blade 25c also rotates, and the high-pressure inside air in the outer peripheral space inside the driving side meets the pressure introduction pipe 49 and flows into the air chamber 48c in the labyrinth on the counter driving side.

For this reason, even when outside air tries to enter the labyrinth portion from the outside end of the labyrinth portion 25d, the inside of the air chamber 48c is pressurized by the inside air. There is no intrusion.

In the vehicle drive fully-closed electric motor according to the present embodiment, the entire rotor can be pulled out from one direction, so that maintenance work such as disassembly and assembly work can be facilitated.

1 is a front view of a fully-closed electric motor for driving a vehicle according to a first embodiment of the present invention. FIG. 2 is a vertical sectional view taken along line AO in FIG. 1. FIG. 2 is a vertical sectional view taken along B-O in FIG. 1. FIG. 2 is a C-O longitudinal view of FIG. 1. FIG. 3 is a DD longitudinal sectional view of FIG. 2. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a first ventilation fan of a vehicle drive fully closed electric motor according to a first embodiment of the present invention. It is a front view of the 2nd ventilation fan of the fully-closed electric motor for vehicle drive of 1st Embodiment based on this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram at the time of the decomposition | disassembly state of the vehicle drive fully closed motor of 1st Embodiment based on this invention. It is a longitudinal cross-sectional view of the vehicle drive fully-closed electric motor of 2nd Embodiment based on this invention. It is a partial front view of the fully-closed electric motor for vehicle drive of 2nd Embodiment based on this invention. It is a longitudinal cross-sectional view of the vehicle drive fully-closed electric motor of 3rd Embodiment based on this invention. It is a longitudinal cross-sectional view of the vehicle drive fully-closed electric motor of 4th Embodiment based on this invention. FIG. 13 is a sectional view taken along line EE in FIG. 12. It is sectional drawing of the labyrinth of the fully-closed motor for a vehicle drive of 5th Embodiment based on this invention. It is a longitudinal cross-sectional view of the vehicle drive fully-closed electric motor of 6th Embodiment based on this invention. It is sectional drawing of the labyrinth part of the fully-closed motor for a vehicle drive of 6th Embodiment based on this invention. It is sectional drawing of the labyrinth part of the fully-closed motor for a vehicle drive of 7th Embodiment based on this invention. It is sectional drawing of the labyrinth part of the modification of the fully-closed electric motor for vehicle drive of 7th Embodiment based on this invention. It is sectional drawing of the labyrinth part of the fully-closed motor for a vehicle drive of 8th Embodiment based on this invention. It is sectional drawing of the labyrinth part of the fully-closed electric motor for vehicle drive of 9th Embodiment based on this invention. It is a longitudinal cross-sectional view of the vehicle drive fully-closed electric motor of the tenth embodiment based on the present invention. It is sectional drawing of the labyrinth part of the fully-closed electric motor for vehicle drive of 10th Embodiment based on this invention. It is a front view of the electric motor for vehicle drive. FIG. 24 is an AO longitudinal sectional view of FIG. 23. FIG. 24 is a B-O longitudinal sectional view of FIG. 23.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotor shaft 2 Rotor core 3 1st bracket 4 Bearing 5 2nd bracket 6 Bearing 7 1st ventilation fan 8 2nd ventilation fan 9 1st shielding board 10 3rd bracket 11 2nd shielding board 12 Rotor bar 13 End ring 14 Stator core 15 Stator coil 16 Stator frame 17 Bolt 18 Bolt 21 Outer side bracket 21a First outside air ventilation path 22 Inner side bracket 22a First inlet 23 Outer side bracket 23a Second outside air ventilation Path 24 Inner peripheral side bracket 24a Inlet 25 First ventilation fan 25a Main plate 25b Blade 25c Blade 25d Labyrinth 26 Second ventilation fan 26a Main plate 26b Blade 26c Fin 26d Labyrinth 27 Hanging tool 27a Fastening bolt 28 Outer side bracket 28a First 1's Outside air ventilation path 28b Introduction path 28c Inside air introduction path 29 Outer peripheral side bracket 29a Second outside air ventilation path 29b Introduction path 29c Inside air inflow path 30 Cooler 30a Inside air inlet 30b Inside air wind path 30c Inside air outlet 30d Heat absorbing fin 30e Outer side fin Bracket 32 Outer peripheral bracket 33 First ventilation fan 33a Main plate 33b Blade 33c Guide 34 Gap 35 Rotor core retainer 36 Second ventilation fan 36a Main plate 36b Blade 36c Fin 37 Outer peripheral bracket 37a Inside air inflow passage 37b Second outside air ventilation passage 38 Cooler 38a Inside air inlet 38b Inside air air passage 38c Inside air outlet 38d Outside air inlet 38e Outside air air way 38f Outside air outlet 39 Heat radiation fin 39a Heat radiation fin 39b Heat absorption fin 39c Heat absorption fin 39d Heat radiation fin 40 Bracket 41 Theta frame 42 Bracket 43 Rotor core 44 Stator core 45 Main plate 45b Ventilation hole 45c Space 47 Main plate 47a Blade 47b Notch 48 Stator frame 48c Air chamber 49 Pressure introduction pipe

Claims (8)

The stator core,
A rotor core disposed on the inner peripheral side of the stator core;
A rotor shaft coupled to the center of the rotor core;
A first bearing that rotatably supports the rotor shaft;
A second bearing for rotatably supporting the rotor shaft;
A first outer peripheral bracket attached to the axial end of the stator core on the drive side;
A first inner peripheral bracket that includes the first bearing and is attached to an inner peripheral portion of the first outer peripheral bracket;
A second outer peripheral bracket attached to the axial end of the stator iron core on the non-driving side;
A second inner peripheral bracket that includes the second bearing and is attached to an inner peripheral portion of the second outer peripheral bracket;
A first main plate provided on the drive side of the rotor shaft and attached adjacent to the inner side of the first bearing;
A first blade for blowing outside air provided on an outer side wall surface of the first main plate;
Blades for blowing inside air radially provided on the inner side wall surface of the first main plate;
A first labyrinth configured between an outer peripheral portion of the first main plate and the first outer peripheral bracket;
A second main plate provided on the side opposite to the driving side of the rotor shaft and attached adjacent to the inner side of the second bearing;
A second blade for blowing outside air provided on the machine-side side wall surface of the second main plate;
A second labyrinth configured between the outer periphery of the second main plate and the second outer bracket;
A first ventilation hole penetrating in the axial direction near the outer periphery of the stator core;
A second ventilation hole penetrating in the axial direction in the vicinity of the outer periphery of the stator core;
A first air inlet provided on the inner diameter side of the first inner bracket;
Outside air cooling air that is provided on the first outer peripheral bracket, has one end communicating with one end of the first ventilation hole, the other end opened to the atmosphere, and is blown by the first outside air blowing blade. A first outdoor air flow path through which
A second air inlet provided on the inner diameter side of the second inner peripheral side bracket;
Outside air cooling air provided on the second outer peripheral bracket, one end of which communicates with one end of the second ventilation hole, the other end is opened to the atmosphere, and is blown by the second outside air blowing blade. A second outside air ventilation path through which
The outer diameter of the first main plate is not less than the outer diameter of the rotor core and not more than the outer diameter of the first inner bracket;
An outer diameter dimension of the second main plate is equal to or smaller than an outer diameter dimension of the rotor core and equal to or larger than an outer diameter dimension of the second inner peripheral side bracket. The fully-closed electric motor for driving a vehicle according to claim 1,
A third ventilation hole provided in the vicinity of the outer periphery of the stator core and penetrating the stator core in the axial direction;
One end of the third ventilation hole communicates with the drive-side interior space, and the other end of the third ventilation hole communicates with the counter-drive-side interior space. . The fully-closed electric motor for driving a vehicle according to claim 1,
A cooler having a cooling air passage provided outside the fully-closed electric motor for driving the vehicle and extending in the axial direction;
One end of the cooling air passage provided in the cooler communicates with the driving-side internal space, and the other end of the cooling air passage provided in the cooler communicates with the anti-driving-side internal space. A vehicle-driving fully-closed electric motor, wherein heat sink fins are provided on an inner wall surface of a cooling air passage provided in the cooler, and heat radiation fins are provided on an outer wall surface of the cooling air passage provided in the cooler. The fully-closed electric motor for driving a vehicle according to claim 1,
A cooler which is provided outside the fully-closed electric motor for driving the vehicle and has an internal air passage extending in the axial direction and an external air passage extending in the axial direction;
One end of the cooler's internal air path is in communication with the drive-side internal space, and the other end of the cooler's internal air path is in communication with the non-drive-side internal space;
One end of the outside air air passage of the cooler communicates with the second outside air air passage provided in the second outer peripheral side bracket, and the other end of the outside air air passage is open to the atmosphere. ,
A fully-closed electric motor for driving a vehicle, comprising: an internal air passage of the cooler; and cooling fins provided on an inner wall surface and an outer wall surface of the outer air wind passage of the cooler. The stator core,
A rotor core disposed on the inner peripheral side of the stator core;
A rotor shaft coupled to the center of the rotor core;
A first bearing that rotatably supports the rotor shaft;
A second bearing for rotatably supporting the rotor shaft;
A first outer peripheral bracket attached to the axial end of the stator core on the drive side;
A first inner peripheral bracket that includes the first bearing and is attached to an inner peripheral portion of the first outer peripheral bracket;
A second outer peripheral bracket attached to the axial end of the stator iron core on the non-driving side;
A second inner peripheral bracket that includes the second bearing and is attached to an inner peripheral portion of the second outer peripheral bracket;
A first main plate provided on the drive side of the rotor shaft and attached adjacent to the machine inner side of the first bearing;
A first blade for blowing outside air provided on an outer side wall surface of the first main plate;
Blades for blowing inside air radially provided on the inner side wall surface of the first main plate;
A first labyrinth configured between an outer peripheral portion of the first main plate and the first outer peripheral bracket;
A second main plate provided on the side opposite to the driving side of the rotor shaft and attached adjacent to the inner side of the second bearing;
A second blade for blowing outside air provided on the machine-side side wall surface of the second main plate;
A main plate provided radially on the machine inner side wall surface of the second main plate;
A second labyrinth configured between the outer periphery of the second main plate and the second outer bracket;
A first ventilation hole provided in the stator iron core and penetrating in the axial direction in the vicinity of the outer periphery of the stator iron core;
A first air inlet provided on the inner diameter side of the first inner bracket;
A cooler which is provided outside the fully-closed electric motor for driving the vehicle and has an internal air passage extending in the axial direction and an external air passage extending in the axial direction;
The first outer peripheral bracket is provided with one end thereof communicating with one end of the first ventilation hole, the other end being opened to the atmosphere, and a first external cooling air blown by the first main plate flows. The outdoor air passage of
A second air inlet provided on the inner diameter side of the second inner peripheral side bracket;
The outer diameter of the first main plate is not less than the outer diameter of the rotor core and not more than the outer diameter of the first inner bracket;
The outer diameter of the second main plate is not more than the outer diameter of the rotor core and not less than the outer diameter of the second inner peripheral bracket;
One end of the cooler's internal air path is in communication with the drive-side internal space, and the other end of the cooler's internal air path is in communication with the counter-drive-side internal space;
One end of the outside air air passage of the cooler communicates with the second outside air air passage provided in the second outer peripheral side bracket, and the other end of the outside air air passage is open to the atmosphere. ,
A fully-closed electric motor for driving a vehicle, comprising: an internal air passage of the cooler; and cooling fins provided on an inner wall surface and an outer wall surface of the outer air wind passage of the cooler. In the vehicle drive fully-closed electric motor according to any one of claims 1 to 5,
A fully-enclosed electric motor for driving a vehicle, comprising heat-absorbing fins provided on an inner wall surface of the second main plate. The fully-closed electric motor for driving a vehicle according to any one of claims 1 to 6,
An uneven first labyrinth provided between the first main plate and the first outer peripheral bracket and entering each other in the axial direction;
A fully-closed electric motor for driving a vehicle, comprising: a second labyrinth having an irregular shape provided between the second main plate and the second outer peripheral bracket and entering each other in the axial direction. The fully-closed electric motor for driving a vehicle according to at least one of claims 1 to 7 ,
Dust inflow prevention means for preventing dust from flowing from the outside space into the inside space ,
The dust inflow vibration isolating means provides a circumferential groove-like space on the second labyrinth formed between the outer peripheral portion of the second main plate and the second outer peripheral bracket, A plurality of air supply holes are provided radially near the outer periphery, the inner diameter side of the ventilation holes communicates with the interior space, and the outer diameter side of the ventilation holes communicates with a groove-shaped space on the labyrinth. Fully enclosed electric motor for vehicle drive.

Images