Motor and pump in which the motor is mounted
First Claim
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1. An electrically-driven motor comprising:
- a first cover section, being watertight, including a recessed part having a cylindrical shape closed at one end thereof, and a flat plate part extending toward a radially outward direction from a rim of an opening of the recessed part;
an armature having plural teeth arranged around the recessed part of the first cover section, each tip of the teeth directing toward a radially inward direction;
a shaft extending along the central axis of the recessed part of the first cover section, an one end thereof accommodated in the recessed part;
a field magnet secured either directly or indirectly to the shaft, magnetic poles thereof being arranged in a circumferential direction;
a second cover section formed by press work from a metal plate, the first cover section being secured thereto, having a concave part in which the recessed part of the first cover section and the armature are accommodated; and
a seal member for sealing a space defined between the first cover section and the second cover section by intervening therebetween at a part where both sections contact, wherein;
a rotating body comprises the shaft and the field magnet; and
a stator assembly comprises the first cover section, the armature, the second cover section and the seal member.
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Accused Products
Abstract
In a canned motor, a second cover section for covering a surface of an armature on an opposite side of a first cover section is formed from a pressed metal plate so that the motor can be downsized and inexpensively manufactured. Further, the motor can be easily assembled in such a manner that a bottom of the second cover section and a busbar are made to abut each other so as to decide a position of the armature along a central axis J1.
39 Citations
17 Claims
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1. An electrically-driven motor comprising:
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a first cover section, being watertight, including a recessed part having a cylindrical shape closed at one end thereof, and a flat plate part extending toward a radially outward direction from a rim of an opening of the recessed part;
an armature having plural teeth arranged around the recessed part of the first cover section, each tip of the teeth directing toward a radially inward direction;
a shaft extending along the central axis of the recessed part of the first cover section, an one end thereof accommodated in the recessed part;
a field magnet secured either directly or indirectly to the shaft, magnetic poles thereof being arranged in a circumferential direction;
a second cover section formed by press work from a metal plate, the first cover section being secured thereto, having a concave part in which the recessed part of the first cover section and the armature are accommodated; and
a seal member for sealing a space defined between the first cover section and the second cover section by intervening therebetween at a part where both sections contact, wherein;
a rotating body comprises the shaft and the field magnet; and
a stator assembly comprises the first cover section, the armature, the second cover section and the seal member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 16)
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8. An electrically-driven motor comprising:
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a first cover section, being watertight, including a recessed part having a cylindrical shape closed at one end thereof, and a flange extending toward a radially outward direction from a rim of an opening of the recessed part;
an armature having plural teeth arranged around the recessed part of the first cover section, each tip of the teeth directing toward a radially inward direction;
a shaft extending along the central axis of the recessed part of the first cover section, an one end thereof accommodated in the recessed part;
a field magnet secured either directly or indirectly to the shaft, magnetic poles thereof being arranged in a circumferential direction;
a second cover section secured to the first cover section, having a concave part in which the recessed part of the first cover section and the armature are accommodated;
a seal member for sealing a space defined between the first cover section and the second cover section by intervening therebetween at a part where both sections contact; and
a busbar contacting a circuit board and thereby secured, the busbar further being electrically connected to the circuit board and the armature so as to lead a drive current to the armature, wherein;
an upper surface of the busbar contacts a lower surface of the bottom of the second cover section so that a position thereof along the central axis is determined; and
an upper part of the armature contacts a lower surface of the busbar or a lower surface of the circuit board so that a position thereof along the central axis is determined. - View Dependent Claims (9, 10, 15, 17)
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Specification