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US 4,906,884 AGranted
Flat motor
AssigneeSanden Corporation
InventorToshiyuki Teshigawara
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AssigneeSanden Corporation
InventorToshiyuki Teshigawara
Estimating the term…
A flat motor is disclosed comprising a motor housing having a first engaging mechanism, a magnet fixed to the motor housing, a holder plate attached to the motor housing and provided with a pair of brush holders. The holder plate has a second engaging mechanism engaging the first engaging mechanism. A third engaging mechanism engages an inside surface of the magnet. The holder plate can be positioned coaxially with the motor housing by the engagement of the first engaging mechanism with the second engaging mechanism, the magnet can be positioned coaxially with the holder plate by the engagement of the third engaging mechanism with the magnet. The motor housing, the holder plate and the magnet can all be positioned coaxially with one another without use of a particular jig, thereby improving the assembly of the flat motor and increasing the productivity of the motor.
A flat motor comprising:
A flat motor comprising:
A flat motor comprising:
Dependencies are inferred from the claim text.
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For cooperation with commutators: slidably supported brushes
Characterised by arrangement for exciting: having permanent magnet excitation
DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors: disc armature motors or generators
Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports: machines characterised by means…
Term ended 3 Oct 2008 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to a D.C. flat motor, and specifically relates to improvement of the inside structure of the flat motor in order to make the assembly of the motor easy and increase the productivity of the motor.
2. Description of the Prior Art
Some preferred exemplary embodiments of the invention will now be described with reference to the accompanying drawings which are given by way of example only, and thus are not intended to limit the present invention, and in which:
FIG. 1 is a sectional view of a flat motor according to a first embodiment of the present invention;
FIG. 2 is a plan view of a holder plate of the flat motor shown in FIG. 1;
The preferred embodiments of the present invention will be described hereafter with reference to the attached drawings.
FIGS. 1-6 illustrate a flat motor according to a first embodiment of the present invention. A flat motor has a disk-like shaped upper motor housing 21 opening downward, a lower motor housing 22 closing the opening of the upper motor housing, and a motor shaft 23 extending through the upper motor housing and in the lower motor housing.
Upper motor housing 21 has a stepped shape in section and a through hole 21a for motor shaft 23. A bearing 24a is mounted on an upper portion of motor shaft 23, and the outer ring of bearing 24a is fixed to the inside surface of upper motor housing 21. Lower motor housing 22 has a depressed portion 22a in the central portion of the motor housing, and a protrusive portion 22b extending in the circumferential direction of the motor housing on the outer portion in the radial direction of the motor housing. A bearing 24b is mounted on a lower portion of motor shaft 23, and the outer ring of bearing 24b is fixed to the inside surface of depressed portion 22a. A ring-like shaped magnet 25 is fixed on the top surface of protrusive portion 22b. Magnet 25 is bonded to motor housing 22 by an adhesive. A resin holder plate 26 is attached on motor housing 22 between depressed portion 22a and protrusive portion 22b. In this embodiment, holder plate 26 is bonded to motor housing 22 by an adhesive.