Integrated gear motor and method of assembly
First Claim
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1. A gear motor assembly, comprising:
- a uni-directional DC electric motor having an exterior housing,a reduction gear train driven by said motor,an output shaft rotatably driven by said gear train,a circuit board having motor control circuitry powered by a DC power source; and
a three part housing consisting of a gear case, a gear case cover and a circuit board cover,said gear case housing the gear train and output shaft and having a generally planar rear wall bordered by a right angularly related side wall along its periphery,said gear case cover being a substantially planar member adapted for sealed connection with said side wall of said gear case in opposed relation with said rear wall whereby to enclose said gear train,said gear train being supported for rotation by and between one side of said gear case cover and the generally planar rear wall of said gear case;
said gear case cover supporting said circuit board and motor on a second side thereof,said circuit board cover having a substantially planar front wall integral with an uninterrupted side wall extending outwardly from the periphery of said front wall whereby to provide an enclosure having one open side for encasing said circuit board and motor;
said motor extending outwardly from said circuit board toward said front wall of said circuit board cover.
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Abstract
A gear motor assembly having a three-part molded housing consisting of a gear case having one open side for housing a reduction gear train, a rotatably driven output shaft and coaxial cam; a circuit board cover having one open side for housing a printed circuit board and motor control components including a cam operated switch for periodically deenergizing an electric DC motor also mounted on the circuit board, and a gear case cover interposed between the gear case and circuit board, which is welded to the gear case and circuit board cover to effect a sealed protective housing.
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Citations
11 Claims
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1. A gear motor assembly, comprising:
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a uni-directional DC electric motor having an exterior housing, a reduction gear train driven by said motor, an output shaft rotatably driven by said gear train, a circuit board having motor control circuitry powered by a DC power source; and a three part housing consisting of a gear case, a gear case cover and a circuit board cover, said gear case housing the gear train and output shaft and having a generally planar rear wall bordered by a right angularly related side wall along its periphery, said gear case cover being a substantially planar member adapted for sealed connection with said side wall of said gear case in opposed relation with said rear wall whereby to enclose said gear train, said gear train being supported for rotation by and between one side of said gear case cover and the generally planar rear wall of said gear case; said gear case cover supporting said circuit board and motor on a second side thereof, said circuit board cover having a substantially planar front wall integral with an uninterrupted side wall extending outwardly from the periphery of said front wall whereby to provide an enclosure having one open side for encasing said circuit board and motor; said motor extending outwardly from said circuit board toward said front wall of said circuit board cover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. The method of protectively encasing the components of a gear motor assembly within a three-part sealed housing consisting of a gear case carrying a gear train and an output shaft, a gear case cover for enclosing an open side of said gear case, and a circuit board cover housing an electric motor for rotating a gear engaging drive pinion, a circuit board and motor controls for controlling operation of the motor, comprising the steps of:
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assembling the motor, circuit board and motor controls on one side of the gear case cover and mounting said circuit board cover over said one side of said gear case cover, effecting sealed interconnection between said circuit board cover and said gear case cover, assembling the gear train and drive shaft in the gear case, mounting the gear case cover over the open side of the gear case to enclose the interior thereof; and effecting sealed interconnection between said gear case cover and gear case.
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Specification