Abstract: A hydrostatic transmission includes a hydraulic pump, a hydraulic motor, and a center section. The center section is formed therein with first and second fluid passages connecting kidney ports opened at a pump mounting surface to kidney ports opened at a motor mounting surface. The first and second fluid passages include respective straight portions parallel to the pump mounting surface and the motor mounting surface. When the center section is viewed to face the motor mounting surface, the straight portions of the first and second fluid passages substantially entirely overlap each other. When the center section is viewed to face the pump mounting surface, the straight portion of the first fluid passage is disposed between both ends of the second fluid passage, so that the straight portion of the first fluid passage and the ends of the second fluid passage are aligned on a substantially straight line.

Abstract: A hydraulically driven vehicle comprises: a first transaxle disposed at one of front and rear portions of the vehicle, wherein the first transaxle incorporates a first hydraulic motor for driving a first axle; a second transaxle disposed at the other of the rear or front portion of the vehicle, wherein the second transaxle incorporates a second hydraulic motor for driving a second axle; a hydraulic pump for supplying fluid to the first and second hydraulic motors; a mower; a duct for transferring grass mowed by the mower, wherein the first transaxle is disposed above the duct; and a vertical power train interposed between the first axle and an axial center shaft of a wheel driven by the first axle, wherein the power train is disposed on a lateral outside of the duct.

Abstract: A pump unit applied to a working vehicle includes an input shaft operatively connected to an output shaft of a driving source, first and second hydraulic pump bodies, a pump housing that accommodates the first and second hydraulic pump bodies having respective rotational axis lines parallel to the input shaft, a PTO shaft, and a mounting housing that couples the pump housing with the driving source in a state that the pump housing is free from the vehicle frame. The input shaft is supported by the pump and is parallel to the output shaft of the driving source, and extends outwardly from a surface of the pump housing that faces the driving source and is inserted into the mounting housing. The PTO shaft is supported by the pump housing and is parallel to the input shaft and extends outwardly from a surface of the pump housing that is opposite to the surface that faces the driving source.

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 rotatably 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) drivingly connected to the single axle (20L).

Abstract: A vehicle has an engine, an accelerator for controlling the rotary speed of the engine, an axle and a multi-speed transmission for transmitting power from the engine to the axle. The multi-speed transmission includes an odd-numbered speed drive train for an odd-numbered speed level, a first clutch for the odd-numbered speed drive train, an even-numbered speed drive train for an even-numbered speed level, and a second clutch for the even-numbered speed drive train. In correspondence to operation of the accelerator and an actual speed of the axle, either the odd-numbered speed drive train or the even-numbered speed drive train is selected so as to transmit power from the engine to the axle. A shift-up or shift-down timing between the odd-numbered speed level and the even-numbered speed level relative to variation of the actual speed of the axle is changed according to detection of a tilt angle of the vehicle or a weight of the vehicle.

Abstract: An axle driving device includes a hydrostatic transmission (HST) having a hydraulic pump and a hydraulic motor which are in fluid communication with one another through a closed circuit within a center section of the HST, an axle capable of being driven by driving power of various speeds from the HST, a common housing which houses the HST and the axle, wherein the center section is provided with an oil hole for supplying a working fluid to the closed circuit, the oil hole is connected to an oil filter placed in an oil reservoir within the housing, and a magnet provided near the oil filter, wherein a magnet holding portion for holding the magnet is formed integrally with the center section.

Abstract: A hydraulic drive vehicle includes a bypass valve for fluidly connecting or disconnecting a pump/second-motor line and a second-motor/first-motor line, and set a capacity of a first hydraulic motor to a standard capacity which makes a peripheral speed of a first wheel driven by the first hydraulic motor equal to a peripheral speed of a second wheel driven by a second hydraulic motor when the bypass valve fluidly disconnects the two lines and set the capacity of the first hydraulic motor to a first capacity smaller than the standard capacity when the bypass valve fluidly connects the two lines. The present invention makes it possible to widen a variable range in which a traveling speed of the vehicle could be changed.

Abstract: A fluid passage member includes a pump mounting surface onto which a hydraulic pump having a rotary axis is mounted; first and second kidney ports opened at the pump mounting surface; a first fluid extraction port outwardly opened and connected to the first kidney port; a motor mounting surface onto which a hydraulic motor having a rotary axis is mounted so that the rotary axis of the hydraulic motor is parallel to the rotary axis of the hydraulic pump; third and fourth kidney ports opened at the motor mounting surface; and a second fluid extraction port outwardly opened and connected to the third kidney port.

Abstract: A transaxle (1), having a hydraulic drive unit (20) and a pair of left and right wheel support units (2L and 2R), is suspended from a vehicle frame so as to be turnable around a turning-center axis oriented in a fore-and-aft direction of a vehicle. The hydraulic drive unit (20) comprises: a pair of left and right hydraulic motors (23L and 23R) having respective left and right horizontal motor shafts (23b); a center section (22) formed therein with an oil passage for hydraulically connecting at least one of the hydraulic motors to a hydraulic pump, the center section having motor attachment surfaces onto which the hydraulic motors are attached; and a pair of left and right axle casings (2L and 2R) containing the respective hydraulic motors and supporting the respective motor shafts.

Abstract: A power transmission system of a hydraulically driven working vehicle comprises: a prime mover supported by a vehicle frame, the prime mover including a prime mover output shaft projecting in the fore-and-aft direction of the vehicle; a pump housing; a hydraulic pump disposed in the pump housing, the hydraulic pump including a pump shaft projecting from the pump housing in the fore-and-aft direction of the vehicle so as to be drivingly connected to the prime mover output shaft; a first hydraulic motor disposed outside the pump housing so as to be fluidly connected to the hydraulic pump; a transaxle supported by one of front and rear portions of the vehicle frame, the transaxle including a transaxle housing, a pair of axles disposed in the transaxle housing so as to be driven by the hydraulic motor, and a differential gear unit disposed in the transaxle housing so as to be drivingly interposed between the hydraulic motor and the pair of axles; a PTO shaft; and a working power train extracting a part of power t

Abstract: There is provided an electric ground working vehicle including a left wheel and a right wheel, at least one caster, a working apparatus, an acceleration operating element for performing acceleration instructions, a turn operating element for performing turn instructions, and a control unit. The left wheel and the right wheel are independently driven by left and right electric motors respectively. The control unit controls a regenerative brake driving unit so that electric power is regenerated from the left and right electric motors to an electric power source unit when the acceleration operating element is not operated during traveling to regeneratively brake the left and right wheels.

Abstract: A hydraulic transaxle comprises a transaxle casing for supporting left and right axles, a pair of hydraulic motors disposed in the transaxle casing so as to drive the respective left and right axles, hydraulic ports provided in the transaxle casing so as to fluidly connect the pair of hydraulic motors in parallel to a common hydraulic pump, and a system for restricting or canceling differential rotation of the pair of hydraulic motors.

Abstract: A hydraulic transmission comprises a hydraulic pump and a hydraulic motor, which are mounted onto a center section to be fluidly connected to each other through a closed fluid circuit formed in the center section. A neutral valve is connected to the closed fluid circuit. The neutral valve is fitted into an outward opened end of a vertical slanted oil hole of the closed fluid circuit. Alternatively, the neutral valve is fitted into an outward opened end of a straight oil hole having an opposite outward opened end into which a charge check valve is fitted.

Abstract: A electric vehicle comprises 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 speed change system for a working vehicle comprises a main transmission, a sub transmission and a preliminary transmission. The main transmission receives a prime mover power outputted from a prime mover, and has plural main speed stages, one of which is selected to transmit the prime mover power. The sub transmission is disposed on the downstream of the main transmission, and has plural sub speed stages, one of which is selected to transmit a power from the main transmission. The preliminary transmission is disposed on the upstream of the main transmission, and has plural preliminary speed stages, one of which is selected to transmit the prime mover power to the main transmission. An operation for selecting one of the preliminary speed stages can be performed during traveling of the working vehicle.

Abstract: A supplemental brake system of a zero turn vehicle has a prime mover, a brake pedal, a pair of axles, and a pair of transaxles driven by the prime mover so as to drive the respective axles. The transaxles include respective brakes for braking the respective axles according to depression of the brake pedal. Also included are supplemental braking means for stopping transmission of power from the prime mover to the pair of transaxles according to depression of the brake pedal.

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: A dual clutch transmission includes a group of odd-numbered speed drive trains, including at least a first speed drive train to be driven for setting a first speed serving as the lowest speed; a first clutch to be engaged for driving any one of the odd-numbered speed drive trains including the first speed drive train; a group of even-numbered speed drive trains, including at least a second speed drive train to be driven for setting a second speed serving as the second lowest speed; a second clutch to be engaged for driving any one of the even-numbered speed drive trains including the second speed drive train; an automatic speed control system for selecting one of all the odd-and-even numbered speed drive trains to be driven, and for selecting either the first or second clutch to be engaged for driving the selected speed drive train in correspondence to a traveling speed of a vehicle equipped with the dual clutch transmission; and a manual selection device for selecting any one of all the odd-and-even numbered

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: There is provided a working vehicle having first and second hydraulic pump units operatively driven by a driving source and arranged away to each other in a width direction of the vehicle. In the working vehicle, each of the first and second hydraulic pump units includes a pump body; a port block formed with an oil passage for supplying/discharging an operating fluid to/from said pump body; a pump case connected to the port block so as to define a pump body accommodating space for surrounding the pump body; and a pump shaft for rotatably driving the pump body, the pump shaft having an input end operatively connected to said driving source. A drain port for opening the pump body accommodating space outward and a charge suction port for drawing in an oil from an oil tank in order to supply a charge oil to a hydraulic circuit fluidly connecting with the corresponding hydraulic motor unit are provided respectively in first and second assemblies formed by the corresponding pump case and port block.