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An engine, through a suitable transmission, drives the traction wheels of a garden tiller in a forward direction. The engine also drives the tine shaft and tines through another transmission and a differential. The second transmission contains a gear arrangement by which the tine shaft may be rotate

An engine, through a suitable transmission, drives the traction wheels of a garden tiller in a forward direction. The engine also drives the tine shaft and tines through another transmission and a differential. The second transmission contains a gear arrangement by which the tine shaft may be rotated in the same direction as the traction wheels at one time, and in an opposite direction at another time, a neutral position also being provided. The second transmission includes a splined shaft which drivingly engages a gear which is slidable thereon. An output gear is provided in this second transmission and it may be drivingly connected to the slidable gear for rotation in a given direction by means of a plurality of pins carried on the output gear and received within appropriate holes provided in the slidable gear. Right and left cluster gears are mounted on a common shaft. A gear idler is mounted on yet another shaft and this gear idler constantly meshes with the output gear and with the right hand cluster gear. The slidable gear may be slid to a neutral position wherein it no longer engages the pins and wherein it does not engage the left hand cluster gear. The slidable gear may be moved to a further position where it engages the left hand cluster gear. This latter position results in the output gear being driven in the opposite direction via the splined shaft, the slidable gear, the left hand cluster gear, the right hand cluster gear and the gear idler.

대표청구항 ▼

A garden tiller comprising a chassis, a pair of traction wheels supporting said chassis, guide handles attached to said chassis by which an operator may guide said tiller, a tine shaft rotatably mounted in said chassis, earth working tines secured on said tine shaft, said tines being located between

A garden tiller comprising a chassis, a pair of traction wheels supporting said chassis, guide handles attached to said chassis by which an operator may guide said tiller, a tine shaft rotatably mounted in said chassis, earth working tines secured on said tine shaft, said tines being located between the operator and said traction wheels, an engine mounted on said chassis, first transmission means for driving said traction wheels in a given direction via said engine, second transmission means, an output shaft for said second transmission means, and a differential for driving said tines in said given direction via said second transmission means, said output shaft and said engine, said tiller being characterized by: said second transmission means including a reversing mechanism by means of which said tines may be driven in an opposite, reverse direction of said given direction while said traction wheels continue to be driven in said given direction; said second transmission means comprising a gear train including an output gear operatively connected to said output shaft, a slidable gear movable into rotational driving contact with said output gear to drive said output gear in said given direction, and gear means interposable between said slidable gear and said output gear to drive said output gear in said opposite, reverse direction; said gear train including a splined shaft on which said slidable gear is slidable and with which said slidable gear is rotatable, said splined shaft being rotatably driven by said engine and constituting a part of said second transmission means, said gear means including a gear idler in meshing engagement with said output gear, and a gear cluster mounted on a common shaft, said gear cluster including a first gear in meshing engagement with said gear idler and free of direct driving contact with said output gear and a second gear spaced therefrom, and shift means to slide said slidable gear out of driving contact with said output gear and into meshing driving contact with said second gear whereby to drive said output gear and output shaft in said opposite, reverse direction via said splined shaft, said slidable gear, said second gear, said first gear and said gear idler; and said rotational driving contact between said slidable gear and said output gear being achieved by a plurality of pins fixed in one of said slidable gear and said output gear and adapted to be received in mating holes fixed in the other of said slidable gear and said output gear.