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 control system for a lawnmower vehicle having a plurality of electric motors may include at least one controller for controlling operation of the drive wheel electric motor in response to an operation amount of at least one operator. The controller may control operation of a driver for driving a mower-related electric motor to cause the mower-related electric motor to activate or stop.

Abstract: The present invention provides a driven-side pulley including a fixed sheave supported by a driven shaft that is relatively rotatable around an axis line and immovable along the axis line, a movable sheave supported by the driven shaft that is relatively rotatable around the axis line and movable along the axis line, a spider supported by the driven shaft that is relatively non-rotatable around the axis line and immovable along the axis line, a biasing member that presses the movable sheave in a direction toward the fixed sheave, a main torque-cam mechanism that presses the movable sheave in the axis line in accordance with a relative difference in a rotational angle between the spider and the movable sheave, and a sub torque-cam mechanism that presses the movable sheave in the axis line in accordance with a relative difference in a rotational angle between the fixed sheave and the movable sheave.

Abstract: A hydraulic motor unit according to the present invention includes an electric motor having an electric motor main body that is electrically controlled, an electric motor case that accommodates the electric motor main body and an electric motor main body output shaft that is rotated around an axis line thereof by the electric motor main body, the electric motor case being detachably mounted to the motor housing, wherein mounting of the electric motor to the motor housing causes the electric motor main body output shaft to be operatively connected to the first end of the control shaft so that the control shaft is rotated around the axis line in accordance with rotation of the electric motor main body output shaft.

Abstract: Provided an electrically-operated hydraulic actuator unit that includes an electrically-operated motor controlled by a control apparatus and actuating a volume adjusting mechanism through driving-side and driven-side arms, and a clutch mechanism in which the driven-side arm presses a contact member against a clutch case so that the driven-side arm is locked when a force from the volume adjusting mechanism is applied to the driven-side arm. The control apparatus can set duties of first to fourth drive signals to be output to the electrically-operated motor in a neutral-side start period, a neutral-side ordinary actuation period, a higher-volume-side start period and a higher-volume-side ordinary actuation period. The duties of the first and fourth drive signals are larger than that of the second drive signal, the duty of the third drive signal is larger than that of the fourth drive signal, and an integrated ON-time of the third drive signal is larger than that of the first drive signal.

Abstract: An electric zero-turn working vehicle comprises a vehicle body frame, right and left drive wheels, right and left first electric motors for driving the respective right and left drive wheels, a transaxle including at least one of the right and left first electric motors, a working implement, and a second electric motor for driving the working implement. The right and left first electric motors have a space therebetween. The transaxle is supported by the vehicle body frame and is disposed below the vehicle body frame. At least a part of the second electric motor is disposed in the space between the right and left first electric motors.

Abstract: A belt type variable speed-change mechanism transmitting a rotational power from a driving shaft to a driven shaft in a continuously variable manner and a constant-speed power-transmitting mechanism transmitting a rotational power at a constant-speed from the driving shaft to a constant-speed driven-side rotational body supported by the driven shaft in a relatively rotatable manner with respect thereto are accommodated in a casing. A planetary gear mechanism including a first element receiving a variable-speed rotational power through the driven shaft, a second element receiving a constant-speed rotational power through the constant-speed driven-side rotational body and a third element outputting a combined rotational power is supported by the driven shaft in the casing.

Abstract: A hydrostatic stepless transmission (“HST”) includes a center casing into which a plunger block of a hydraulic pump and a plunger block of a hydraulic motor are inserted. Plunger ports are open and aligned peripherally on an outer peripheral surface of each plunger block. A pair of main fluid passages of a closed fluid circuit fluidly connecting the hydraulic pump to the hydraulic motor are formed in opposite side portions of the center casing. Each of the main fluid passage includes peripheral grooves formed on an inner peripheral surface of the center casing so as to face the plunger ports of the respective plunger blocks, and includes an axial fluid duct formed to be interposed between the peripheral grooves. A bearing gap is provided between the inner peripheral surface of the center casing and the outer peripheral surface of the plunger block so as to cause a dynamic pressure action of fluid.

Abstract: A riding lawnmower includes left and right wheels, at least one caster wheel, a lawnmower blade or reel, and a control section. The left and right wheels are independently driven by electric rotary machines to travel. The lawnmower blade or reel is driven for mowing. The control section, in response to turn instruction input by a turn operator, controls the left and right wheels according to preset standard setting conditions, or according to deceleration setting conditions which differ from the standard setting conditions, under which at least one of a vehicle movement speed and vehicle turning speed is decelerated more than under standard setting conditions. The riding lawnmower includes a section designating either standard setting conditions or deceleration setting conditions. In a riding lawnmower, left and right wheels are caused to turn around a turn center position corresponding to a turn instruction according to designated setting conditions.

Abstract: A hydraulic motor unit according to the present invention includes an electric motor having an electric motor main body that is electrically controlled, an electric motor case that accommodates the electric motor main body and an electric motor main body output shaft that is rotated around an axis line thereof by the electric motor main body, the electric motor case being detachably mounted to the motor housing, wherein mounting of the electric motor to the motor housing causes the electric motor main body output shaft to be operatively connected to the first end of the control shaft so that the control shaft is rotated around the axis line in accordance with rotation of the electric motor main body output shaft.

Abstract: A hydraulic actuator unit includes a first electric motor assembly formed by mounting one of a pair of electric motors to one of a pair of electric motor covers, wherein the first electric motor assembly is detachably mounted to a pump case so as to rotate a first control shaft around its axis line, and a second electric motor assembly formed by mounting the other one of the pair of electric motors to the other one of the pair of electric motor covers, wherein the second electric motor assembly is detachably mounted to the pump case so as to rotate a second control shaft around its axis line.

Abstract: A hydrostatic transmission comprises a hydraulic pump, a hydraulic motor, first and second main fluid passages fluidly connecting the hydraulic pump to the hydraulic motor so as to constitute a closed fluid circuit, a charge fluid passage, a plurality of first charge check valves and a plurality of second charge check valves. The plurality of first charge cheek valves are interposed between the charge fluid passage and the first main fluid passage so as to allow only flow of fluid from the charge fluid passage to the first main fluid passage when the first main fluid passage is hydraulically depressed relative to the charge fluid passage. The plurality of second charge check valves are interposed between the charge fluid passage and the second main fluid passage so as to allow only flow of fluid from the charge fluid passage to the second main fluid passage when the second main fluid passage is hydraulically depressed relative to the charge fluid passage.

Abstract: A riding-type ground working vehicle includes left and right wheels, a command value calculating section, a yaw rate detecting section that detects a yaw rate of the vehicle, a target yaw rate calculating section, a correction coefficient acquiring section, and a control section. The left and right wheels are independently driven to travel by two respective traction motors. The command value calculating section calculates target rotational speed command values for the two traction motors based on an acceleration instruction and a turn instruction input by a driver. The target yaw rate calculating section calculates a target yaw rate based on the acceleration instruction and the turn instruction. The correction coefficient acquiring section acquires two correction coefficients respectively relating to the two traction motors based on a deviation between the target yaw rate and a yaw rate detection value.

Abstract: An axle driving apparatus for being mounted on the body frame of a vehicle and for independently rotating drive wheel members. The axle driving apparatus includes a first axle driving unit (18L) having a housing (40) and a single axle (20L), the single axle (20L) defining a proximal end portion rotatbly mounted in the housing (40) and a distal end portion extending outwardly from a first side of the housing (40). An enlarged region is defined by the housing (40), with the enlarged region extending substantially perpendicular to the longitudinal axis of the single axle (20L). A hydraulic stepless speed change assembly (22) is disposed within the enlarged region. The speed change assembly (22) includes a hydraulic pump (52) having an input shaft (21) projecting from the enlarged region and includes a hydraulic motor (55) including an output shaft (74) driving connected to the single axle (20L).

Abstract: A wheel motor device applicable to a working vehicle including a driving power source, a hydraulic pump main body operatively driven by the driving source and a driving wheel, the wheel motor device comprising a hydraulic motor main body forming an HST in cooperation with the hydraulic pump main body, a motor shaft supporting the hydraulic motor main body in a relatively non-rotatable manner with respect thereto, an output member outputting toward the driving wheel the rotational power that has been operatively transmitted from the motor shaft, and a casing accommodating the hydraulic motor main body and supporting the motor shaft and the output member.

Abstract: Provided an electrically-operated hydraulic actuator unit that includes an electrically-operated motor controlled by a control apparatus and actuating a volume adjusting mechanism through driving-side and driven-side arms, and a clutch mechanism in which the driven-side arm presses a contact member against a clutch case so that the driven-side arm is locked when a force from the volume adjusting mechanism is applied to the driven-side arm. The control apparatus can set duties of first to fourth drive signals to be output to the electrically-operated motor in a neutral-side start period, a neutral-side ordinary actuation period, a higher-volume-side start period and a higher-volume-side ordinary actuation period. The duties of the first and fourth drive signals are larger than that of the second drive signal, the duty of the third drive signal is larger than that of the fourth drive signal, and an integrated ON-time of the third drive signal is larger than that of the first drive signal.

Abstract: At least one of first and second hydraulic motor units that drive first and second wheels is of a variable displacement. A volume adjusting mechanism thereof is operated by an electric motor in accordance with manual operation or automatic operation based on difference in turning radius between the first and second wheels. A control device that controls the electric motor includes normal mode that operates the electric motor in accordance with the manual operation or the automatic operation and torque-up mode that fixes the variable displacement hydraulic motor to a first volume larger than a standard volume, and activates the torque-up mode at idling state in which a power source is in operating state and a pump-side volume adjusting mechanism is in neutral state and shifts the torque-up mode to the normal mode when a traveling speed reaches a first speed.

Abstract: A transaxle includes an axle and a multiple motor generator unit for driving the axle. The multiple motor generator unit includes a common rotor shaft drivingly connected to the axle, armature windings serving as a first stator and a second stator aligned opposite each other in the axial direction of the rotor shaft, a common rotor member fixed on the rotor shaft, and permanent magnets provided on the common rotor member so as to serve as a first rotor facing the first stator, and as a second rotor facing the second stator. The first stator and the first rotor constitute a first motor generator. The second stator and the second rotor constitute the second motor generator. A total motor output torque of the first and second motor generators for rotating the rotor member and the rotor shaft can be changed in correspondence to a load applied from the axle to the rotor shaft.

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.