| Patent application number | Description | Published |
|---|
| 20080217991 | Hydraulic Transaxle - A transaxle ( | 09-11-2008 |
| 20080283324 | Hydraulically Driven Working Vehicle and Hydraulic Transaxle - In a hydraulic four-wheel drive vehicle, a rear transaxle incorporates a hydraulic motor for driving rear wheels, a front transaxle incorporates a hydraulic motor for driving front wheels, and hydraulic pressure fluid pipes interposed between the front and rear transaxles are extended along at least one of left and right side plates of a frame of the vehicle. | 11-20-2008 |
| 20090025997 | Hydraulic Drive Vehicle with Cooling System - A hydraulic drive vehicle comprises a vehicle frame, a bonnet, a prime mover, a hydraulic transaxle, a seat, a reservoir tank, and a cooling fan and a cooling duct. The bonnet is supported on one of front and rear portions of the vehicle frame, and provided therein with a first space. The prime mover is disposed in the first space. The hydraulic transaxle is driven by the prime mover. The seat is supported on the other of the front and rear portions of the vehicle frame, and is provided therebelow with a second space. The reservoir tank is fluidly connected to the hydraulic transaxle. The cooling fan is driven by the prime mover. The cooling duct is disposed in the second space. The cooling fan and the reservoir tank are disposed in the cooling duct so that the cooling fan cools the reservoir tank. A hydraulic pump for driving the hydraulic transaxle is disposed in the cooling duct so as to be cooled by the cooling fan. | 01-29-2009 |
| 20090049833 | Hydraulic Transaxle - 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. | 02-26-2009 |
| 20090200858 | Wheel Motor Device - A wheel motor device according to the present invention includes 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, a speed-reduction gear mechanism for reducing the speed of the rotational power output from the motor shaft, a first output member for outputting the rotational power whose speed has been reduced by the speed-reduction gear mechanism toward a corresponding first driving wheel, a casing accommodating the hydraulic motor main body and the speed-reduction gear mechanism, and a brake mechanism selectively and operatively applying a brake force to the first output member. The brake mechanism includes a brake shaft supported by the casing, a speed-increasing gear mechanism for increasing the speed of the rotational power output from the motor shaft and operatively transmitting the same to the brake shaft, and a brake unit for selectively and operatively applying the brake force to the brake shaft. | 08-13-2009 |
| 20090288901 | Hydrostatic Transaxle and Hydraulically Driven Vehicle - 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. | 11-26-2009 |
| 20100051410 | Traveling System Transmission Structure for Vehicle - 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. A front end portion of a forward/rearward-travel input shaft is directly or indirectly supported by the intermediate bearing wall and a rear end portion of a clutch shaft is supported by a rear bearing wall that is detachably connected to the rear side of the transmission case, so that the forward/rearward-travel switch unit is accommodated in a rear chamber that is sandwiched by the intermediate bearing wall and the rear bearing wall. | 03-04-2010 |
| 20100147616 | Hydrostatic Transaxle - A hydrostatic transaxle comprises: a motor casing; at least one hydraulic motor disposed in the motor casing; at least one output shaft disposed in the motor casing so as to be driven by the at least one hydraulic motor; and a pair of steerable wheel support units attached onto respective opposite ends of the motor casing. Each of the steerable wheel support units includes an axle, a steerable casing, a wheel, and a steering arm. In each of the steerable wheel support units, the axle is drivingly connected to the at least one output shaft, the steerable casing is substantially horizontally rotatable relative to the motor casing, the wheel is attached on an outer end of the axle outside of the steerable casing, and the steering arm is rotatably integrally provided on the steerable casing. The hydrostatic transaxle further comprises a pair of connection rods for connecting the steering arms of the steerable wheel support units to a common rotary member of a steering operation mechanism spaced forward or rearward from the hydrostatic transaxle. | 06-17-2010 |
| 20100222172 | Power Transmission System of Hydraulically Driven Working Vehicle - 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 transmitted from the prime mover output shaft to the pump shaft and transmitting the extracted power to the PTO shaft. | 09-02-2010 |
| 20110099993 | Transmission - A transmission comprises a casing, an output element, a hydrostatic stepless transmission unit (HST) and a forward/backward traveling direction selecting unit (reverser). The output element is supported by the casing. The HST is disposed in the casing so as to be driven by a drive source disposed outside of the casing. The HST includes a pump shaft and a motor shaft member. The pump shaft is drivingly connected to the drive source. The motor shaft member is fitted around the pump shaft coaxially to the pump shaft so as to be rotatable relative to the pump shaft, thereby constituting a hydraulic pump and a hydraulic motor centered on the pump shaft and the motor shaft member. An axially distal end of the motor shaft member is disposed on the axially proximal side of an axially distal end of the pump shaft so that axial ends of the pump shaft are the axially most distal ends of the HST in the axial direction of the pump shaft. The reverser is disposed in the casing so as to transmit power outputted from the HST to the output element. The reverser includes a forward-traveling drive train, a backward-traveling drive train, and a clutch for selecting either the forward-traveling drive train or the backward traveling drive train to transmit the power outputted from the motor shaft member to the output element. The reverser and the output element are entirely disposed between the axial ends of the pump shaft in the axial direction of the pump shaft. | 05-05-2011 |
