초록 ▼

The invention relates to a totally enclosed type driving electric motor in which a stator core having a coil is attached to an inner peripheral portion of a frame, a bearing bracket supporting a bearing is attached to one end of the frame, a housing supporting a bearing is attached to another end of

The invention relates to a totally enclosed type driving electric motor in which a stator core having a coil is attached to an inner peripheral portion of a frame, a bearing bracket supporting a bearing is attached to one end of the frame, a housing supporting a bearing is attached to another end of the frame, and a shaft of a rotor is rotatably supported by the first bearing and the second bearing. The totally enclosed type driving electric motor of the invention is provided with a cooling space near at least one of the first bearing and the second bearing.

대표청구항 ▼

1. A totally enclosed type driving electric motor, comprising:a shaft;a cylindrical frame which surrounds the shaft;a bearing bracket having a circular shape and attached to one end of the frame, the bearing bracket having a first hole through which the shaft passes and having the same axis as the s

1. A totally enclosed type driving electric motor, comprising:a shaft;a cylindrical frame which surrounds the shaft;a bearing bracket having a circular shape and attached to one end of the frame, the bearing bracket having a first hole through which the shaft passes and having the same axis as the shaft;a housing having a circular shape and attached to another end of the frame, the housing having a second hole through which the shaft passes and having the same axis as the shaft;a bearing which is located outside of a unit formed of the frame, the bearing bracket and the housing, and which rotatably supports the shaft;a bearing support which is located outside of the unit and in an inner diameter portion of the bearing bracket, wherein the bearing support supports the bearing; anda rib which couples the bearing bracket to the bearing support, such that said bearing support, said bearing bracket and the rib provide a cooling space communicated to outside air. 2. A totally enclosed type driving electric motor according to claim 1, wherein said rib is provided with a cooling fin. 3. A totally enclosed type driving electric motor according to claim 1, further comprising:a collar connected to the shaft providing a first labyrinth with said bearing support and a second labyrinth with said bearing bracket. 4. A totally enclosed type driving electric motor according to claim further comprising:a collar connected to the shaft providing a first labyrinth with the bearing support; anda cap connected to the bearing bracket and providing a second labyrinth with the collar;wherein the bearing support comprises a first groove and the cap comprises a second groove. 5. A totally enclosed type driving electric motor according to claim 1, further comprising a guide wind path, which guides air from said outside air into said cooling space. 6. A totally enclosed type driving electric motor, comprising:a shaft;a cylindrical frame which surrounds the shaft;a bearing bracket having a circular shape and attached to one end of the frame, the bearing bracket having a first hole through which the shaft passes and having the same axis as the shaft;a housing having a circular shape and attached to another end of the frame, the housing having a second hole through which the shaft passes and having the same axis as the shaft;a bearing which is located outside a unit formed of the frame, the bearing bracket and the housing, and which rotatably supports the shaft;a bearing support which is located outside the unit and in an inner diameter portion of the bearing bracket, wherein the bearing support supports the bearing, anda rib which couples the housing to the bearing support, such that said bearing support, said housing and the rib provide a cooling space communicated to outside air. 7. A totally enclosed type driving electric motor according to claim 6, wherein said rib is provided with a cooling fin. 8. A totally enclosed type driving electric motor according to claim 6, further comprising:a collar connected to the shaft providing a first labyrinth with said bearing support and a second labyrinth with said housing. 9. A totally enclosed type driving electric motor according to claim 6, further comprising:a collar connected to the shaft providing a first labyrinth with the bearing support; anda cap connected to the housing and providing a second labyrinth with the collar;wherein the bearing support comprises a first groove and the cap comprises a second groove. 10. A totally enclosed type driving electric motor according to claim 6, further comprising a guide wind path, which guides outside air from said outside air into said cooling space. 11. A totally enclosed type driving electric motor, comprising:a shaft;a cylindrical frame which surrounds the shaft;a bearing bracket having a circular shape and attached to one end of the frame, the bearing bracket having a first hole through which the shaft passes and having the same axis as the shaft;a housing having a circular shape and attached to another end of the frame, the housing having a second hole through which the shaft passes and having the same axis as the shaft;a bearing which is supported by the bearing bracket and which rotatably supports the shaft;a collar which is located outside of a unit formed of the frame, the bearing bracket and the housing, and which is connected to the bearing, the collar including a fan which radiates heat transmitted from the bearing through the collar to outside air. 12. A totally enclosed type driving electric motor according to claim 11, wherein said fan generates a wind by rotating, and said wind cools the bearing bracket. 13. A totally enclosed type driving electric motor according to claim wherein a part of the bearing bracket that receives said wind includes a cooling fin. 14. A totally enclosed type driving electric motor according to claim 11, wherein the collar includes a disc, which is concentric with the shaft and includes a groove. 15. A totally enclosed type driving electric motor, comprising:a shaft;a cylindrical frame which surrounds the shaft;a bearing bracket having a circular shape and attached to one end of the frame, the bearing bracket having a first hole through which the shaft passes and having the same axis as the shaft;a housing having a circular shape and attached to another end of the frame, the housing having a second hole through which the shaft passes and having the same axis as the shaft;a bearing which is supported by the housing and which rotatably supports the shaft;a pressing plate which is connected to said shaft, and which is located outside of a unit formed of the frame, the bearing bracket and the housing, and which is connected to the bearing, the pressing plate having a groove to allow heat transmission from the bearing to outside air. 16. A totally enclosed type driving electric motor according to claim 15, wherein said groove generates a wind by rotating, and said wind cools the frame or the housing. 17. A totally enclosed type driving electric motor according to claim 16, wherein a part of the frame or the housing that is exposed to said wind includes a cooling fin.