Abstract: A rotation direction switching device for switching the rotation direction of a drive shaft includes a pulley unit for switching the rotation direction of the drive shaft. The pulley unit has a forward rotation drive belt and a reverse rotation drive belt. The forward rotation drive belt extends between the forward rotation drive pulley and a forward rotation driven pulley. The reverse rotation drive belt extends between a reverse rotation drive pulley and a reverse rotation driven pulley. When the drive shaft is forwardly rotated, the forward rotation belt is placed in a tensioned state, and the reverse rotation belt is switched to a relaxed state. When the drive shaft is reversely rotated, the reverse rotation belt is placed in a tensioned state, and the forward rotation belt is switched to a relaxed state.

Abstract: A walk-behind work machine in which vibration produced by the driving of an engine is not readily transmitted to an operating handle. The work machine includes a work-machine body having a plurality of mounting parts to which an engine is joined. The mounting parts include a high-rigidity mounting part positioned at a maximally rigid part on the work-machine body, and other mounting parts exclusive of the high-rigidity mounting part. The engine is joined securely to the other mounting parts and is joined more loosely to the high-rigidity mounting part than to the other mounting parts.

Abstract: A walk-behind work machine in which vibration produced by the driving of an engine is not readily transmitted to an operating handle. The work machine includes a work-machine body having a plurality of mounting parts to which an engine is joined. The mounting parts include a high-rigidity mounting part positioned at a maximally rigid part on the work-machine body, and other mounting parts exclusive of the high-rigidity mounting part. The engine is joined securely to the other mounting parts and is joined more loosely to the high-rigidity mounting part than to the other mounting parts.

Abstract: A hydraulically driven vehicle is disclosed which is moved or turned by driving left and right hydraulic transmissions with one engine and driving left and right drive wheels with these hydraulic transmissions. The vehicle includes a gear-shifting mechanism for converting the actions of an operator and transmitting the result to the hydraulic transmissions, which mechanism is comprised of a first swinging member that is swung by a vehicle speed cable, and left and right second swinging members that are placed on the first swinging member, that are swung by left and right steering cables, and that push and pull push-pull rods.

Abstract: A rotation direction switching device for switching the rotation direction of a drive shaft includes a pulley unit for switching the rotation direction of the drive shaft. The pulley unit has a forward rotation drive belt and a reverse rotation drive belt. The forward rotation drive belt extends between the forward rotation drive pulley and a forward rotation driven pulley. The reverse rotation drive belt extends between a reverse rotation drive pulley and a reverse rotation driven pulley. When the drive shaft is forwardly rotated, the forward rotation belt is placed in a tensioned state, and the reverse rotation belt is switched to a relaxed state. When the drive shaft is reversely rotated, the reverse rotation belt is placed in a tensioned state, and the forward rotation belt is switched to a relaxed state.

Abstract: A hydraulically driven vehicle is disclosed which is moved or turned by driving left and right hydraulic transmissions with one engine and driving left and right drive wheels with these hydraulic transmissions. The vehicle includes a gear-shifting mechanism for converting the actions of an operator and transmitting the result to the hydraulic transmissions, which mechanism is comprised of a first swinging member that is swung by a vehicle speed cable, and left and right second swinging members that are placed on the first swinging member, that are swung by left and right steering cables, and that push and pull push-pull rods.

Abstract: A working machine has a transmission case having a transmission mechanism accommodated therein. The transmission mechanism has an input shaft having a first longitudinal axis and an output shaft having a second longitudinal axis extending in a direction generally perpendicular to the first longitudinal axis. A working unit is mounted to a front portion or a side portion of the transmission case and is connected to the output shaft of the transmission mechanism. A working is drive source is connected to the input shaft of the transmission mechanism for driving the working unit via the transmission mechanism for driving the working unit via the transmission mechanism. The working drive source is mounted to an upper surface portion of the transmission case. A traveling unit has at least one driving axle mounted to a side portion of the transmission case. An electric motor is mounted to a side portion of the transmission case for driving the traveling unit.

Abstract: A walk-behind self-propelled working machine includes an engine disposed with a crankshaft extending vertically in a downward direction and a cylinder disposed horizontally, and a generator having a drive shaft disposed vertically downward. The drive shaft of the generator and the crankshaft of the engine have respective axes that are disposed on a line perpendicular to an axis of the cylinder, as viewed in plan. The crankshaft and the drive shaft are connected together via a power transmitting mechanism.

Abstract: A motorized vehicle has a vehicle body, at least a pair of wheels mounted on the vehicle body for undergoing rotation to cause the motorized vehicle to undergo travelling, and a pair of electric motors each mounted on the vehicle body to selectively undergo forward and reverse rotation to rotationally drive a respective one of the wheels. A first switch is connected to the electric motors so that operation of the first switch causes the electric motors to undergo rotation simultaneously in opposite directions to turn the motorized vehicle in a first direction while the motorized vehicle does not undergo travelling. A second switch is connected to the electric motors so that operation of the second switch causes the electric motors to undergo rotation simultaneously in opposite directions to turn the motorized vehicle in a second direction opposite to the first direction while the motorized vehicle does not undergo travelling.

Abstract: A self-propelled walk-behind snowplow vehicle has a vehicle body and a vertical engine mounted on an upper part of the vehicle body. The vertical engine has a crankshaft disposed generally vertical and a cylinder head disposed generally horizontal to a longitudinal direction of the snowplow vehicle. The cylinder head projects from the vehicle body in a rearward direction of the snowplow vehicle. Left and right traveling units are mounted on a lower part of the vehicle body at left and right sides thereof. A muffler is connected to the engine and is disposed below the engine and located between the left and right traveling units. The vehicle body and the left and right traveling units together define a downward opening space within which the muffler is disposed.

Abstract: A snow removing machine which throws up snow collected by an auger with a blower and throws out the snow via a chute is provided. The chute is provided on a blower housing enclosing the blower. The chute is placed on the right or left of the blower housing in a body width direction, so as to receive snow thrown up by centrifugal force of the blower. In a dead space on the opposite side to the chute, a control unit for controlling rotations of electric motors and so on and a battery for supplying power to the electric motors are disposed.

Abstract: A self-propelled walk-behind snowplow vehicle includes a vehicle body, an engine mounted on an upper part of the vehicle body, left and right traveling units mounted on a lower part of the vehicle body at left and right sides thereof, and a muffler connected to the engine. To lower the level of exhaust sound and to provide obstruction-free field of forward vision to the operator, the muffler is disposed below the engine and located between the left and right traveling units.

Abstract: A snow removing machine which throws up snow collected by an auger with a blower and throws out the snow via a chute is provided. The chute is provided on a blower housing enclosing the blower. The chute is placed on the right or left of the blower housing in a body width direction, so as to receive snow thrown up by centrifugal force of the blower. In a dead space on the opposite side to the chute, a control unit for controlling rotations of electric motors and so on and a battery for supplying power to the electric motors are disposed.

Abstract: A snow removal machine of this invention has a machine body, a snow removing section mounted on the machine body for removing snow while the snow removal machine travels along a ground surface, and a running section mounted on the machine body for undergoing movement to cause the snow removal machine to travel along the ground surface. An engine is mounted on the machine body for driving the snow removing section. An oil filler supplies oil to the engine. A fuel cock opens and closes a fuel line supply to the engine. A spark plug ignites a fuel mixture within the engine. A cover has a first cover portion and a second cover portion. A connecting structure connects the second cover portion to the first cover portion to cover the engine, the oil filler, the fuel cock and the spark plug and allows disconnection of the second cover portion from the first cover portion to expose and provide access to the engine, the oil filler, the fuel cock and the spark plug.

Abstract: A motorized vehicle has a vehicle body, at least a pair of wheels mounted on the vehicle body for undergoing rotation to cause the motorized vehicle to undergo travelling, and a pair of electric motors each mounted on the vehicle body to selectively undergo forward and reverse rotation to rotationally drive a respective one of the wheels. A first switch is connected to the electric motors so that operation of the first switch causes the electric motors to undergo rotation simultaneously in opposite directions to turn the motorized vehicle in a first direction while the motorized vehicle does not undergo travelling. A second switch is connected to the electric motors so that operation of the second switch causes the electric motors to undergo rotation simultaneously in opposite directions to turn the motorized vehicle in a second direction opposite to the first direction while the motorized vehicle does not undergo travelling.

Abstract: A walk-behind self-propelled working machine includes an engine disposed with a crankshaft extending vertically in a downward direction and a cylinder disposed horizontally, and a generator having a drive shaft disposed vertically downward. The drive shaft of the generator and the crankshaft of the engine have respective axes that are disposed on a line perpendicular to an axis of the cylinder, as viewed in plan. The crankshaft and the drive shaft are connected together via a power transmitting mechanism.

Abstract: A motorized vehicle has wheels mounted on a vehicle body for undergoing rotation to cause the motorized vehicle to undergo travelling, electric motors for selectively undergoing forward and reverse rotation to rotationally drive respective ones of the wheels, brakes for applying brake forces to respective ones of the wheels, handlebars extending from the vehicle body, and turn control levers mounted on the handlebars to undergo angular movement within a range of preselected angular positions. The turn control levers are connected to respective ones of the brakes and respective ones of the electric motors so that the electric motors undergo rotation simultaneously in opposite directions in accordance with the preselected angular positions of the turn control levers to turn the motorized vehicle while the motorized does not undergo travelling.

Abstract: Transmission mechanism accommodated in a transmission case includes an input shaft extending upward to connect to a vertical engine and an output shaft extending horizontally to connect to a working unit. The engine is mounted on an upper surface portion of the transmission case, and the working unit, motors and axles of left and right traveling sections, such as crawler belts, are attached to the transmission case between the traveling sections. The working unit is vertically pivotable about the central axis of axles of the traveling sections. The driving wheels and motors are positioned adjacent to front end portions of an engine crankshaft positioned near and rearward of the central axis.

Abstract: A snow removal machine of this invention has an upper cover portion and a lower cover portion of upper and lower split halves. The upper cover portion is removable from the lower cover portion. The upper cover portion covers components such as an engine, oil filler, fuel cock, spark plug and battery. These parts are exposed by removing the upper cover portion.

Abstract: A snow removing machine having an electromagnetic clutch mounted to an output shaft of an engine, and a drive pulley. The electromagnetic clutch is mounted to a proximal end of the output shaft to be remotely separate from the engine. As a result, heat generated in the engine during operation thereof is not directly transferred to the electromagnet clutch whose magnetic force generated during operation is not deteriorated. The drive pulley is mounted to the output shaft at an area closer to the engine. The drive pulley has a lower weight than the electromagnet clutch, thereby mitigating load to be exerted to a part which supports the output shaft.