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A light-weight portable winch which incorporates a low-horsepower motor, a speed-reducing transmission which is supported by outrigger bearings, a cable take-up drum which is disengagable from the speed-reducing transmission, and a positive lock brake which acts on the drum and which is operable, in

A light-weight portable winch which incorporates a low-horsepower motor, a speed-reducing transmission which is supported by outrigger bearings, a cable take-up drum which is disengagable from the speed-reducing transmission, and a positive lock brake which acts on the drum and which is operable, independently of the winch motor, to prevent rotation of the drum.

대표청구항 ▼

1. A portable winch comprising a chain saw motor unit including a gasoline-powered engine, a housing for the engine, a motor output shaft with clutch driven by the engine, said output shaft extending laterally of the chain saw motor unit, an elongate frame including an elongate base and opposed

1. A portable winch comprising a chain saw motor unit including a gasoline-powered engine, a housing for the engine, a motor output shaft with clutch driven by the engine, said output shaft extending laterally of the chain saw motor unit, an elongate frame including an elongate base and opposed upstanding sides extending upwardly from opposed side margins of said base joined to said base, means securing said housing of the chain saw motor unit to the base of said frame adjacent one end of said frame with the chain saw motor unit disposed above said base and with an end of the motor unit facing toward the opposite end of said frame and with said motor output shaft above and extending transversely of said frame base, a winch drum assembly including a winch drum and drum shaft means extending axially of the drum and having ends projecting from opposite ends of the drum, said winch drum assembly being located between said frame sides and above said base adjacent said opposite end of said frame, bearings journaling said ends of said drum shaft on said frame sides, a speed-reducing transmission including input and output shafts which extend out from opposite sides of the transmission, said transmission being secured to said frame with the transmisssion positioned intermediate the chain saw motor unit and said drum assembly and between said frame sides with said ends extending inwardly therefrom, bearings journaling said input and outputs shafts on said sides of the frame, first power-transmitting means extending longitudinally of said frame inwardly of the frame sides connecting the clutch of the motor output shaft and the input shaft of the speed-reducing transmission, and second power-transmitting means extending longitudinally of said frame with said input and output shafts extending inwardly therefrom inwardly of the frame sides connecting the output shaft of said speed-reducing transmission and said drum shaft. 2. The portable winch of claim 1, wherein said frame sides extend upwardly from said bearings journaling the drum shaft and speed reducing transmission shafts to be in a covering relation over the sides of said speed-reducing transmission and the ends of the drum. 3. The portable winch of claim 2, which further includes a cover plate secured to said frame extending over said speed-reducing transmission and over portions of said frame sides disposed on either side of said speed-reducing transmission. 4. The portable winch of claim 1, wherein said drum has opposed end flanges at opposite ends thereof and which further includes a brake tightenable over one end flange to brake movement of the drum, and wherein said second power-transmitting means connects said speed-reducing transmission output shaft with said drum shaft through the other of said end flanges and which further includes selection means for selectively drivingly connecting and disconnecting the second power-transmitting means and drum shaft. 5. The portable winch of claim 4, wherein said second power-transmitting means includes a drive sprocket having said selection means mounted thereon and said other end flange includes at least one bore therein, said selection means having a spring-biased pin, receivable in said bore for releasably locking said drive sprocket to said other end flange, said pin being retractable to disestablish a driving connection, and being extensible to establish a driving connection. 6. The portable winch of claim 1, wherein said frame includes a pair of spaced-apart anchor-attachment means adjacent said one end for securing said frame to an anchor, and said drum shaft means includes a center point intermediate said flanges, said anchor attachment means being positioned to form the base of an isosceles triangle with said center point, said anchor-attachment means being located intermediate said opposed upstanding sides.