1. A feed device for a motor vehicle for feeding washer fluid from a reservoir to a washer jet arranged in front of a window or lens, having a feed pump which is driven by an electric motor and having a ventilating means for the electric motor, characterized by means for forming an air bubble within the electric motor (3) in the event of a water level reaching the electric motor (3) in its designated installation position.
2. The feed device as claimed in claim 1, characterized in that the ventilating means has an opening (11, 18, 25, 36, 42, 50) which points downward in the designated installation position of the electric motor (3), and in that the housing (6, 16, 23, 33, 52) is designed such that it is hermetically sealed in the upper region.
3. The feed device as claimed in claim 1 or 2, characterized in that the opening (25, 42, 50) can be closed by means of a valve (27, 45, 47) and channels present in the remaining region of the housing (23, 52) do not exceed a designated cross section.
4. The feed device as claimed in at least one of the preceding claims, characterized in that the lower edge of a cap (15) arranged on the upper side of the electric motor (3) is arranged level with the opening (18).
5. The feed device as claimed in at least one of the preceding claims, characterized in that the cap (15) forms a subregion of the opening (18).
6. The feed device as claimed in at least one of the preceding claims, characterized in that the housing (6, 52) of the electric motor (3) has a channel (10, 48) guided up to the opening (11, 50).
7. The feed device as claimed in at least one of the preceding claims, characterized in that a recess (20) is arranged in the housing (16) of the electric motor (3) on the opposite side of the opening (18), and in that the recess (20) and the opening (18) are connected to each other via the channel (annular groove 19).
8. The feed device as claimed in at least one of the preceding claims, characterized in that the cap (7, 29, 38) is sealed with respect to the housing (6, 23, 33) of the electric motor (3).
9. The feed device as claimed in at least one of the preceding claims, characterized in that contacts (8) which are arranged on the upper side of the electric motor (3) and are provided for the connection of electric lines are sealed with respect to the cap (7, 15, 29, 38) or the housing (6, 16, 23, 33).
10. The feed device as claimed in at least one of the preceding claims, characterized in that the cap (7, 15) has a seal (9, 21) manufactured from an elastomeric material, and in that the seal (9, 21) bears tightly against the contacts (8).
11. The feed device as claimed in at least one of the preceding claims, characterized in that the housing (33) is connected in the region of its recess (32), which is provided for ventilation purposes, in a sealing manner to an elastic, annular element (34) or partially annular element (40), and in that the element (34, 40) has a channel (35, 43) with the opening (36, 42).
12. The feed device as claimed in at least one of the preceding claims, characterized in that the annular element (34) covers an annular groove (37) which is arranged on the outside of the housing (33) of the electric motor (3) in the region of the recess (32) provided for ventilation purposes, and in that the channel (35) is connected to the annular groove (37).
13. The feed device as claimed in at least one of the preceding claims, characterized in that the channel (35, 48) is inclined by a designated angle with respect to the axis of symmetry of the electric motor (3).
14. The feed device as claimed in at least one of the preceding claims, characterized in that the channel (35) has an encircling collar (39) at its free end.
15. The feed device as claimed in at least one of the preceding claims, characterized in that a valve (27, 45, 47) controlled by a float (28, 44, 51) is arranged on the opening (50) or in the channel (26, 43) connected to the opening (25, 42).
16. The feed device as claimed in at least one of the preceding claims, characterized in that the opening (11, 18, 25, 36, 42, 50) is arranged on a side of the electric motor (3) that is to face the reservoir (2, 49).
17. The feed device as claimed in at least one of the preceding claims, characterized in that a housing (24) of the feed pump (4) to be arranged below the electric motor (3) has a subregion of the channel (26) guided to the opening (25).
18. The feed device as claimed in at least one of the preceding claims, characterized in that a valve body of the valve (45) which is designed as a float (44) is mounted pivotably.
19. A reservoir for a feed device which is provided for feeding washer fluid to motor-vehicle washer jets arranged in front of a window or lens, the feed device having a feed pump which is driven by an electric motor and a housing having a ventilating device for the electric motor, characterized in that the reservoir (49) has an edge (59) which fits over the electric motor (56) and is guided at least to the lower side of the housing (55).
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A synchronous motor comprising:
a rotor including a rotor core constituted of segment poles disposed in a ring, each of the segment poles having a magnetic salient pole characteristic; and
a stator including a stator core disposed radially outward or inward of the rotor with a gap therebetween and a multiple-phase stator winding wound on the stator core,
the rotor being rotated in synchronization with a rotating magnetic field generated when the multiple-phase stator winding is applied with a multiple-phase AC voltage,
wherein a lamination thickness as an axial length of the stator core is shorter than a lamination thickness as an axial length of the rotor core.
2. The synchronous motor according to claim 1, wherein the segment pole is formed with a concave portion depressed toward an opposite stator side at a circumferential center of a surface thereof radially facing the stator to provide the magnetic salient pole characteristic.
3. The synchronous motor according to claim 2, wherein a permanent magnet is disposed in each of the concave portions formed in the segment poles
4. The synchronous motor according to claim 3, wherein a permanent magnet is disposed between each circumferentially adjacent two of the segment poles.
5. A synchronous motor comprising:
a rotor including a rotor core constituted of segment poles disposed in a ring, each of the segment poles having a magnetic salient pole characteristic;
an outer stator including an outer stator core disposed radially outward of the rotor with a gap therebetween, and a multiple-phase outer stator winding wound on the outer stator core; and
an inner stator including an inner stator core disposed radially inward of the rotor with a gap therebetween, and a multiple-phase inner stator winding wound on the inner stator core,
the rotor being rotated in synchronization with a rotating magnetic field generated when the multiple-phase outer stator winding and the multiple-phase inner stator winding are applied with a multiple-phase AC voltage,
wherein
a lamination thickness as an axial length of the outer stator core and a lamination thickness as an axial length of the inner stator core are shorter than a lamination thickness as an axial length of the rotor core.
6. The synchronous motor according to claim 5, wherein the lamination thickness as the axial length of the inner stator core is shorter than the lamination thickness as the axial length of the outer stator core.
7. The synchronous motor according to claim 5, wherein the segment pole is formed with an outer concave portion depressed radially inward of the rotor at a circumferential center of an radially outer surface thereof radially facing the outer stator to provide the magnetic salient pole characteristic, and formed with an inner concave portion depressed radially outward of the rotor at a circumferential center of an radially inner surface thereof radially facing the inner stator to provide the magnetic salient pole characteristic.
8. The synchronous motor according to claim 7, wherein a permanent magnet is disposed in each of the outer and inner concave portions formed in the segment poles.
9. The synchronous motor according to claim 8, wherein a permanent magnet is disposed between each circumferentially adjacent two of the segment poles.