Winch with power train, manual operation option, and particular brake assembly
First Claim
Patent Images
1. A winch comprising:
- a drum rotatable about a first axis adapted to be connected by a cable to a load;
a reversible electric motor having an output shaft;
a brake hub;
a one-way bearing mounted on said output shaft between said brake hub and said output shaft;
means for power rotating said drum mounted on a drum shaft about said first axis either clockwise or counter clockwise in response to power supplied from said motor, including an electrical switch for connecting said motor to a source of electrical power, said switch including an actuator and having off, forward, and reverse positions corresponding to an off condition, and forward and reverse rotation directions, respectively, of said output shaft;
braking means for braking said motor output shaft to prevent movement thereof at least in said reverse direction when said switch is in said off position, said braking means comprising a brake arm with a brake lining engageable with said brake hub of said one way bearing assembly on said output shaft which, when braked by said brake arm and lining, allows forward rotation of said output shaft but not reverse rotation thereof; and
means for mechanically deactivating said braking means when said switch is in said reverse position, said means comprising an extension of said switch actuator.
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Accused Products
Abstract
A winch includes a reversible electrical motor with output shaft which drives a drum through a drive mechanism with multiple sprockets and gears to take up and let out a cable. The output shaft is connected through a one-way bearing to a brake hub. The brake lining on a brake arm is spring biased into engagement with the hub and prevents reverse rotation of the output shaft unless an electrical switch actuator is moved to a reverse position, camming the brake arm out of braking relationship with the hub. The drive mechanism may also be powered manually in the forward direction. If free-wheeling of the drum is desired, a knob is rotated to disconnect a clutch in the drive mechanism.
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Citations
20 Claims
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1. A winch comprising:
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a drum rotatable about a first axis adapted to be connected by a cable to a load; a reversible electric motor having an output shaft; a brake hub; a one-way bearing mounted on said output shaft between said brake hub and said output shaft; means for power rotating said drum mounted on a drum shaft about said first axis either clockwise or counter clockwise in response to power supplied from said motor, including an electrical switch for connecting said motor to a source of electrical power, said switch including an actuator and having off, forward, and reverse positions corresponding to an off condition, and forward and reverse rotation directions, respectively, of said output shaft; braking means for braking said motor output shaft to prevent movement thereof at least in said reverse direction when said switch is in said off position, said braking means comprising a brake arm with a brake lining engageable with said brake hub of said one way bearing assembly on said output shaft which, when braked by said brake arm and lining, allows forward rotation of said output shaft but not reverse rotation thereof; and means for mechanically deactivating said braking means when said switch is in said reverse position, said means comprising an extension of said switch actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A winch comprising:
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a drum rotatable about a first axis adapted to be connected by a cable to a load; a reversible electric motor having an output shaft; means for power rotating said drum mounted on a drum shaft about said first axis either clockwise or counter clockwise in response to power supplied from said motor, including an electrical switch for connecting said motor to a source of electrical power, said switch including an actuator and having off, forward, and reverse positions corresponding to an off condition, and forward and reverse rotation directions, respectively, of said output shaft; braking means for braking said motor output shaft to prevent movement thereof at least in said reverse direction when said switch is in said off position; means for mechanically deactivating said braking means when said switch is in said reverse position, said means comprising an extension of said switch actuator; and wherein said means for power rotating said drum further comprises a first sprocket connected to said output shaft, a second sprocket connected to said drum shaft, and a chain extending between said sprockets. - View Dependent Claims (17, 18, 19)
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20. A winch comprising:
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a drum rotatable about a first axis adapted to be connected by a cable to a load; a reversible electric motor having an output shaft; means for power rotating said drum mounted on a drum shaft about said first axis either clockwise or counter clockwise in response to power supplied from said motor, including an electrical switch for connecting said motor to a source of electrical power, said switch including an actuator and having off, forward, and reverse positions corresponding to an off condition, and forward and reverse rotation directions, respectively, of said output shaft; braking means for braking said motor output shaft to prevent movement thereof at least in said reverse direction when said switch is in said off position; means for mechanically deactivating said braking means when said switch is in said reverse position, said means comprising an extension of said switch actuator; and means for manually rotating said drum about said first axis independent of said motor in said forward rotation direction to wind up a cable thereon to pull a load.
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Specification