Abstract: A power unit includes an engine, a belt transmission driven by the engine, and a second transmission driven by the belt transmission. The engine includes an engine output shaft having an end portion projecting outward from the engine. The second transmission includes a transmission input shaft and a transmission output shaft having respective end portions projecting outward from the second transmission. The belt transmission includes a drive pulley provided on the end portion of the engine output shaft, a driven pulley provided on the end portion of the transmission input shaft, and a belt looped over the drive and driven pulleys. The belt has first and second portions between the drive and driven pulleys. The first portion runs from the drive pulley to the driven pulley. The second portion runs from the driven pulley to the drive pulley.

Abstract: An electric vehicle comprising a drive wheel which is driven by a traction electric motor, a brake command device, a brake releasing unit, a brake shaft, a friction plate, and a braking spring. The brake shaft is rotatable in a brake realizing direction which is one direction by an operation of the brake command device, and is rotatable in a brake releasing direction which is the other direction by driving of the brake releasing unit. The friction plate is operatively connected to the traction electric motor, and is frictionally braked when the brake shaft is rotated in the brake realizing direction. The braking spring applies an elastic force to the brake shaft in a direction to rotate the brake shaft in the brake realizing direction.

Abstract: A transaxle for a working vehicle including a housing, an integrated hydrostatic transmission (IHT) disposed within the housing, and a bi-directional overrunning clutch disposed within the housing and coupled to an output shaft of the IHT. The bi-directional overrunning clutch includes an input gear having a central opening, a roller assembly disposed within the central opening of the input gear, a plurality of rollers for selective engagement with the input gear, and a pair of hubs. Each hub is disposed at least partially within the roller assembly. The transaxle further includes a pair of clutch covers. Each clutch cover is disposed at either end of the roller assembly and each clutch cover is coupled directly to the roller assembly. The bi-directional overrunning clutch further includes a pair of friction members. Each friction member is disposed between one of the hubs and respective clutch cover. The transaxle also includes a pair of shaft segments of a primary drive axle.

Abstract: A lawnmower vehicle which is a working vehicle with an electromagnetic brake includes left and right electromagnetic brakes, a brake relay which is a common brake releasing unit, and an ECU. The ECU compares electricity supply states of the left and right electromagnetic brakes, and controls the brake relay to disconnect an electrical connection between a battery and the left and right electromagnetic brakes, and to brake left and right wheels when a difference in the electricity supply states compared by a comparator exceeds an allowable upper limit.

Abstract: A power unit may include an engine, a belt transmission driven by the engine, a belt transmission chamber incorporating the belt transmission, a second transmission driven by the belt transmission, a second transmission chamber incorporating the second transmission, and a housing member constituting both a part of the belt transmission chamber and a part of the second transmission chamber.

Abstract: The traveling system transmission structure for vehicle includes a planetary gear unit, a forward/rearward-travel switch unit and a transmission case. A front end portion of a sun gear shaft is directly or indirectly supported by a front bearing wall that is detachably connected to a front side of the transmission case and a rear end portion of a planetary outputting member is directly or indirectly supported by an intermediate bearing wall, so that the planetary gear unit is accommodated in a front chamber that is sandwiched by the front bearing wall and the intermediate bearing wall.

Abstract: In a bi-directional overrunning clutched differential unit, a pair of coaxial hubs are relatively unrotatably fitted on respective coaxial output shafts, and are relatively rotatably inserted into a cage holding rollers. A pair of second bearings journal a clutch housing disposed around the cage is diametrically larger than a pair of first bearings journaling the respective hubs, and are disposed between the first bearings in the axial direction of the output shafts. An axial end portion of the cage and the second bearing on the same axial side are distant from the first bearing on the same axial side so as to have a space where a friction mechanism for applying a frictional rotation resistance onto the cage is disposed.

Abstract: A hydrostatic transmission includes a closed fluid circuit, a hydraulic motor, a hydraulic pump fluidly connected to the hydraulic motor via the closed fluid circuit, and a fluid charging mechanism which supplies fluid delivered from the hydraulic pump to the closed fluid circuit during driving of the hydraulic pump.

Abstract: The working vehicle includes an axle unit that has a differential gear device, an axle case, an axle input shaft and first and second main output shafts, and an HST unit that has a hydraulic pump main body, a hydraulic motor main body, a capacity adjustment mechanism, an HST case, a pump shaft and a motor shaft, an HST input shaft, and an HST output shaft, wherein the axle unit is directly or indirectly supported by the vehicle frame so as to be positioned close to a first main driving wheel in a state where the axle input shaft extends in a vehicle widthwise direction, wherein the HST unit is directly or indirectly supported by the vehicle frame at a position away from the axle unit in a state where the HST output shaft extends in the vehicle widthwise direction, and wherein the HST output shaft and the axle input shaft are operatively connected to each other through an endless type transmission member.

Abstract: A riding work vehicle includes right and left wheels, at least one caster wheel, and a working machine. The lawnmower vehicle further includes traveling motor, steering motor, a traveling system clutch, and a steering system clutch. The traveling system clutch is configured to disable transmission of the rotational force from an axle of the caster wheel to the traveling motor in a state where the traveling motor is deactivated. The steering system clutch is configured to disable transmission of the rotational force from a steering shaft for the caster wheel to the steering motor in a state where the steering motor is deactivated.

Abstract: A power take-off support portion, including a shaft hole and an outer side surface formed around the shaft hole, is formed on a transaxle housing. The outer side surface of the power take-off support portion is shaped to fit a power take-off casing supporting a power take-off shaft in a first direction. A power take-off casing includes a power take-off main casing member and a base casing member joined to each other. The base casing member is formed with an inner side surface and an outer side surface. The inner side surface and the outer side surface of the base casing member are shaped so that the power take-off shaft supported by the power take-off main casing member is oriented in a second direction different from the first direction when the inner side surface of the base casing member is fitted to the outer side surface of the power take-off support portion, and the outer side surface of the base casing member is fitted to the inner side surface of the power take-off main casing member.

Abstract: A hydrostatic transaxle comprises: a housing; an axle disposed in the housing; a hydraulic motor having a rotary axis disposed in the housing; an inward-and-outward opened hole formed in the housing and disposed on the rotary axis of the hydraulic motor; and first and second motor shafts prepared to serve as a motor shaft of the hydraulic motor for driving the axle. One of the first and second motor shafts is selected to be disposed on the rotary axis of the hydraulic motor in the housing. When the first motor shaft is selected, an outer end of the first motor shaft is disposed in the housing so as to face the hole. When the second motor shaft is selected, an outer end of the second motor shaft projects outward from the housing through the hole.

Abstract: An electric lawn mower includes a main frame, a mower deck supported by the main frame, a castor supported by the main frame, a sub frame, a pair of transaxles, and a pair of motor drivers. Each of the transaxles includes a transaxle housing, an electric motor disposed in the transaxle housing, a single axle supported by the transaxle housing, and a drive wheel fixed on the axle outside of the transaxle housing. The motor drivers supply electric power to the respective motors of the respective transaxles. The sub frame, supporting the transaxles and the motor drivers, is connected to the main frame.

Abstract: In a frame structure of a vehicle that includes a flywheel housing, an intermediate housing and a transmission case that are connected to each other along a longitudinal axis of the vehicle to constitute a vehicle frame, the intermediate housing has a hollow shape with a first end and a second end located along the longitudinal axis of the vehicle, the first end having an abutting surface against which the second end of the flywheel housing abuts, a support surface located radially inwardly of the abutting surface so as to support the forward/rearward movement switching unit, and an opening surrounded by the support surface, the opening serving as a first-end opening of the intermediate housing along the longitudinal axis of the vehicle. The abutting surface and the support surface along the longitudinal axis of the vehicle are located so that at least a portion of the forward/rearward movement switching unit is accommodated within the flywheel housing.

Abstract: An axle driving apparatus includes a first housing having a plurality of cooling fins, an axle rotatably mounted in the first housing, a hydraulic stepless speed change assembly disposed within the first housing. The axle driving apparatus also includes a second housing having a plurality of cooling fins, an axle rotatably mounted in the second housing, a hydraulic stepless speed change assembly disposed within the second housing. A connecting means, such as a bar and/or plate connects the first and second housings. The plurality of cooling fins on the first housing has a different configuration that the plurality of cooling fins on the second housing.

Abstract: A hydraulic transaxle has an axle casing and a pair of hydraulic motors disposed in the axle casing. The hydraulic motors have respective motor shafts and respective moveable swash plates. An axis of tilt of each moveable swash plate is offset with respect to a longitudinal axis of the respective motor shaft, and the moveable swash plates are operatively engaged to a steering operation device.

Abstract: A hydraulically powered working vehicle includes a turning section provided at an upper side of a travel unit capable of turning, and hydraulic circuits for the working vehicle. The hydraulic circuit for the working vehicle has a first actuator group including a one side traveling motor, a first variable capacity pump for driving the first actuator group, a second actuator group including an other side traveling motor and a turning motor, and a second variable capacity pump for driving the second actuator group. The second variable capacity pump is set so that a maximum value for discharge capacity per unit time becomes large compared to that of the first variable capacity pump.

Abstract: A pump unit includes a variable capacity pump, and a balanced piston mechanism having a piston body, connected to an operation section of a variable swash plate, provided inside a cylinder, capable of sliding in an axial direction. The balanced piston mechanism has first, second and third pressure receiving chambers provided in the cylinder. Primary side and the secondary side working fluid pressures of an actuator switching valve are respectively introduced to the first receive pressure chamber and the second pressure receiving chamber, and a set pressure that has been previously set, corresponding to a working fluid differential pressure arising before and after passing through the actuator switching valve, in a steady state of the operating position of the actuator switching valve is introduced to the third pressure receiving chamber.

Abstract: There is provided a wheel motor device including a hydraulic motor unit. The hydraulic motor unit includes a hydraulic motor main body, a motor shaft, a motor case and a port block. The port block includes a motor surface to which the motor case is connected, a pump surface to which a pump case surrounding a hydraulic pump main body is detachably connected so as to form a pump space for accommodating the hydraulic pump main body, and a pair of operational fluid passages fluidly connecting between the hydraulic motor main body accommodated in the motor space in a state of being contacted with the motor surface in a sliding manner around its axis line and the hydraulic pump main body accommodated in the pump space in a state of being contacted with the pump surface in a sliding manner around its axis line.

Abstract: A dual clutch transmission includes odd-numbered forward traveling speed drive trains to be activated by engaging a first clutch, even-numbered forward traveling speed drive trains to be activated by engaging a second clutch, and a plurality of backward traveling speed drive trains including at least one backward traveling train to be activated by engaging either the first or second clutch. While a reverse mode is set and when a reverser operation means is shifted between a forward traveling position and a backward traveling position, the first and second clutches are alternately engaged/disengaged for a forward/backward traveling speed shift between a backward traveling speed set by at least one backward traveling speed drive train and a forward traveling speed set by any one forward traveling speed drive train activated by engaging the first or second clutch which is different from the first or second clutch adapted to be engaged for activating the at least one backward traveling speed drive train.