Water-resistant electric motor
View Patent ↗A water-resistant electric motor includes a housing for receiving an electric motor armature therein and an end cap for closing an open end of the housing. The housing includes a drive shaft aperture within a cylindrical recess that receives a journal bearing and a ring seal. The end cap includes a wire access hole for receiving power supply wires. Surrounding the wire access hole is a ridge with cut-outs. A wire cover plate is seated on top of the ridge and includes cut-outs that correspond to the cut-outs in the ridge so that the power supply wires are accommodated therein when the cover plate is secured to the ridge. The wire access hole includes a grommet to seal the hole.
1. A water-resistant electric motor having an armature for applying torque to a drive shaft, said motor comprising:
a. a generally cylindrical housing for receiving the armature therein, said housing comprising:
i. an open end with an annularly disposed flange extending outwardly therefrom, said flange having a first plurality of tabs having one or more apertures therein for receiving one or more fasteners; and
ii. a closed end opposite said open end within which is a drive shaft aperture located co-centric with the longitudinal axis of said housing for receiving the drive shaft therethrough, and a generally cylindrical recess disposed co-centrically about said aperture and recessing toward the interior of said housing within which is seated a ring seal, said recess configured to receive a journal bearing mounted to the drive shaft; and
b. an end cap for closing the open end of said housing, said end cap comprising:
i. a second annularly disposed flange extending outwardly therefrom, said flange having a second plurality of tabs having one or more apertures for receiving one or more fasteners therein, said tabs corresponding to said one or more apertures in said first plurality of tabs;
ii. a wire access hole through the end cap for receiving power supply conductors inserted therethrough;
iii. a ridge extending from an outer surface of said end cap disposed about said wire access hole, and a wire cover plate dimensioned to overlay said ridge, said ridge having at least one cut-out corresponding to at least one cut-out in the edge of said wire cover plate, said cut-outs dimensioned such that the power supply conductors are retained therein when said wire cover plate overlays said ridge;
iv. a second ridge extending interiorly from the inner surface of said end cap encircling said wire access hole to form a reservoir; and
v. a grommet inserted into said wire access hole having apertures for snugly receiving the power supply conductors inserted therethrough.
2. The motor of claim 1 , wherein said end cap further comprises an inner annular rim extending toward the interior of the motor dimensioned to be seated against the inner wall of said open end of said housing.
3. The motor of claim 2 , further comprising an o-ring disposed about the outer periphery of said annular rim.
4. The motor of claim 3 , wherein said end cap further comprises an inner annular rim extending toward the interior of the motor dimensioned to be seated against the inner wall of said open end of said housing.
5. The motor of claim 4 , further comprising an o-ring disposed about the outer periphery of said annular rim.
6. The motor of claim 1 , wherein the drive shaft includes a circumferential groove for receiving a ring seal located along the shaft at the point where the shaft extends through said drive shaft aperture.
7. The motor of claim 6 , wherein said end cap further comprises an inner annular rim extending toward the interior of the motor dimensioned to be seated against the inner wall of said open end of said housing.
8. The motor of claim 7 , further comprising an o-ring disposed about the outer periphery of said annular rim.
9. The motor of claim 1 , further comprising a bush collar seated against the interior wall of said housing.
10. The motor of claim 9 , wherein the drive shaft includes a circumferential groove for receiving a ring seal located along the shaft at the point where the shaft extends through said drive shaft aperture.
11. The motor of claim 10 , wherein said end cap further comprises an inner annular rim extending toward the interior of the motor dimensioned to be seated against the inner wall of said open end of said housing.
12. The motor of claim 11 , further comprising an o-ring disposed about the outer periphery of said annular rim.