Electric motor assembly
First Claim
1. An electric motor assembly comprising:
- (a) a field case housing having;
(i) a substantially cylindrical wall segment having a substantially constant wall thickness;
(ii) an end segment including a motor brush seat receiving a base member of a motor brush assembly, and the end segment having a thickness which is substantially the same as the substantially constant wall thickness of the wall segment;
(iii) a flange around an open end of the housing, at least a portion of the flange having a thickness which is substantially the same as the substantially constant wall thickness of the wall segment; and
(b) an end plate adapted to cover the open end of the housing attached to the flange;
wherein the end segment, the wall segment and the flange are formed as a single, integral part and wherein the thicknesses are adapted to reduce warping of the housing as a result of a molding process.
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Accused Products
Abstract
A field case housing has a substantially cylindrical wall segment, an end segment and a flange all having a substantially constant wall thickness. The flange has reinforcing ribs connected to the wall segment and aperture reinforcing bosses. The end segment, the wall segment and the flange are formed as a single, integral part adapted to reduce warping of the housing during molding. A cylindrical guide member is located in the field case housing and a conical guide member is located in the fan baffle. The cylindrical guide member is adapted to insure a screw passing through the cylindrical guide member is guided to a point within the conical guide member. The fan baffle has a transverse wall with an aperture and guide walls extending adjacent the aperture. The guide walls are adapted to guide an armature past the magnets without contacting and damaging them.
72 Citations
20 Claims
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1. An electric motor assembly comprising:
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(a) a field case housing having; (i) a substantially cylindrical wall segment having a substantially constant wall thickness; (ii) an end segment including a motor brush seat receiving a base member of a motor brush assembly, and the end segment having a thickness which is substantially the same as the substantially constant wall thickness of the wall segment; (iii) a flange around an open end of the housing, at least a portion of the flange having a thickness which is substantially the same as the substantially constant wall thickness of the wall segment; and (b) an end plate adapted to cover the open end of the housing attached to the flange; wherein the end segment, the wall segment and the flange are formed as a single, integral part and wherein the thicknesses are adapted to reduce warping of the housing as a result of a molding process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electric motor assembly comprising:
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an elongate guide member associated with a screw insertion aperture having a diameter and located in a field case housing or a separate motor component; an additional elongate guide member associated with a screw receiving aperture in the other of the field case housing or the separate motor component, the elongate guide member having an aperture at a distal end which is larger than a diameter of the screw insertion aperture; at least one magnet located between the elongate guide member and the additional elongate guide member which exerts a magnetic force on a screw passing from the elongate guide member to the additional elongate guide member; wherein the elongate guide member is adapted to insure a tip of a screw passing through the elongate guide member is guided to a point within the aperture at the distal end of the additional elongate guide member; and
wherein said screw joins the field case housing and the separate motor component together to thereby retain the magnet in a fixed position therebetween. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification