Abstract: A transaxle for auxiliary wheels of a vehicle having a main drive wheel and left and right auxiliary drive wheels, comprises: a gear to which a rotary force for driving the main drive wheel is distributed; a pair of left and right axles drivingly connected to the respective left and right auxiliary drive wheels; a pair of clutches, wherein one of the clutches is interposed between the gear and the left axle, and the other clutch is interposed between the gear and the right axle; judging means for judging whether or not the main drive wheel slips; and a shift mechanism for engaging and disengaging the pair of clutches based on the judgment of the judging means. The judging means comprises a two-way clutch interposed between the gear and the pair of axles, which is engaged when rotary speed of the gear exceeds rotary speed of at least one of the axles.

Abstract: A vehicle power transmission system comprises: a prime mover mounted on a vehicle body frame; a first axle and a first transaxle for driving the first axle disposed at one of front and rear portions of a vehicle, the first transaxle having a first input part projecting outward therefrom, and the first transaxle having a power take-off shaft projecting outward therefrom opposite to the first input part; a speed-changing transmission drivingly interposed between the prime mover and the first input part; a second axle and a second transaxle for driving the second axle disposed at the other rear or front portion of the vehicle, the second axle having a second input part; and a power take-off train extended from a leading part to an ending part. The prime mover is disposed between the first transaxle and the second transaxle in a fore-and-aft direction of the vehicle.

Abstract: A working vehicle comprises: a power source having an output shaft; axles; a cargo deck; and a transmission apparatus for driving axles disposed below the cargo deck. The transmission apparatus includes an input shaft drivingly connected to the output shaft of the power source, a hydro-mechanical stepless transmission driven by the input shaft, and a differential gear assembly differentially connecting the axles to each other. The hydro-mechanical stepless transmission includes a planetary gear assembly and a hydrostatic stepless transmission drivingly connected to the planetary gear assembly. The differential gear assembly is drivingly connected to the hydro-mechanical stepless transmission.

Abstract: A gear shifting mechanism of an axle drive system comprises: a shaft drivingly connected to an axle; a first clutch gear relatively rotatably provided on the shaft, the first clutch gear having first clutch teeth; a second clutch gear relatively rotatably provided on the shaft, the second clutch gear having second clutch teeth; a spline hub fixed on the shaft between the first and second clutch gears; a gear shifting slider axially slidably and not relatively rotatably fitted on the spline hub; slider-shift means integrally movably interlocking with the gear shifting slider; operation means operatively interposed between the slider-shift means and a gear shifting manipulator; and elastic means interposed between the slider-shift means and the operation means. End surfaces of the first, second and third clutch teeth facing one another are flat.

Abstract: A front transaxle device provided to a multi-wheel-driving vehicle comprises an input shaft for receiving power, a pair of left and right front axles supported in the front transaxle device, a differential connecting the left and right front axles differentially, a pinion shaft, a clutch device which engages the pinion shaft with the input and disengages, a rotary object which intervenes between the differential and the pinion shaft, and a brake device which brakes the rotary object. The brake device comprises a piston which can be moved hydraulically, friction objects which engage with each other by the force of the piston, and a mechanism which acts as to make a constant stroke of the piston from a position when the piston starts moving to a position when the friction objects start engaging with each other regardless of abrasive reduction of the friction objects.

Abstract: A gear retaining mechanism is provided for a transmission comprising a rotary shaft, a hub fixed on the rotary shaft, a clutch slider axially slidably fitted on the hub, and a gear relatively rotatably provided on the rotary shaft. The hub is provided on an outer periphery thereof with a male spline having an axially tapered portion. The clutch slider is provided on an inner periphery thereof with a female spline meshing with the male spline of the hub. The gear is provided on an outer periphery thereof with a male spline to mesh with the female spline of the clutch slider. The male spline of the gear includes an axially tapered portion. The clutch slider is slid along the rotary shaft and located so as to fix the gear to the rotary shaft through the hub so that the female spline meshes with the male spline of the gear.

Abstract: A front transaxle device provided to a multi-wheel-driving vehicle comprises an input shaft for receiving power, a pair of left and right front axles supported in the front transaxle device, a differential connecting the left and right front axles differentially, a pinion shaft, a clutch device which engages the pinion shaft with the input shaft and disengages, a rotary object which intervenes between the differential and the pinion shaft, and a brake device which brakes the rotary object. The brake device comprises a piston which can be moved hydraulically, friction objects which engage with each other by the force of the piston, and a mechanism which acts so as to make a constant stroke of the piston from a position when the piston starts moving to a position when the friction objects start engaging with each other regardless of abrasive reduction of the friction objects.

Abstract: A torque limiting apparatus includes: a connecting shaft (20), the output side of which is connected to a differential gear system (60), and the input side of which is protruded out of an opening (80b) formed at the housing (80) of the differential gear system; a hollow cylindrical casing (10) supported on the input side of the connecting shaft rotatably relative thereto, and connectable to the drive shaft; a seal member (14) for interconnecting liquid-tightly an opening at the output side of the casing and an opening of the housing, and a connecting mechanism (30) provided between the casing and the connecting shaft, for transmitting only a partial power less than a predetermined torque value out of whole power input into the casing, so that a lubricating oil can be automatically supplied.

Abstract: A front transaxle device provided to a multi-wheel-driving vehicle comprises an input shaft for receiving power, a pair of left and right front axles supported in the front transaxle device, a differential connecting the left and right front axles differentially, a pinion shaft, a clutch device which engages the pinion shaft with the input shaft and disengages, a rotary object which intervenes between the differential and the pinion shaft, and a brake device which brakes the rotary object. The brake device comprises a piston which can be moved hydraulically, friction objects which engage with each other by the force of the piston, and a mechanism which acts so as to make a constant stroke of the piston from a position when the piston starts moving to a position when the friction objects start engaging with each other regardless of abrasive reduction of the friction objects.

Abstract: A multi-wheel-drive vehicle has at least six wheels, a transmission with a first brake, and a transaxle device for the front drive wheels. The transaxle device includes a drive axle, an input shaft perpendicular to the drive axle for receiving power from the transmission, a drive train connecting the drive axle to the input shaft, a second brake, and a clutch device on the input shaft. The transaxle device may include a pair of drive axles connected by a differential unit. The clutch device can selectively isolate the drive axles from the rotation of the input shaft. Further, the clutch device is engaged when the first brake is applied. Additionally, the first and second brakes may be connected such that their operation may be synchronized.

Abstract: A torque limiting apparatus comprises: a connecting shaft 20, the output side of which is connected to a differential gear system 60, and the input side of which is protruded out of an opening 61a formed at the housing 61 of the differential gear system; a hollow cylindrical casing 10 supported on the input side of the connecting shaft rotatably relative thereto, and connectable to the drive shaft; a seal member 80 for interconnecting liquid-tightly an opening at the output side of the casing and an opening of the housing, and a connecting mechanism 30 provided between the casing and the connecting shaft, for transmitting only a partial power less than a predetermined torque value out of whole power input into the casing, so that a lubricating oil can be automatically supplied.

Abstract: A gear retaining mechanism is provided for a transmission comprising a rotary shaft, a hub fixed on the rotary shaft, a clutch slider axially slidably fitted on the hub, and a gear relatively rotatably provided on the rotary shaft. The hub is provided on an outer periphery thereof with a male spline having an axially tapered portion. The clutch slider is provided on an inner periphery thereof with a female spline meshing with the male spline of the hub. The gear is provided on an outer periphery thereof with a male spline to mesh with the female spline of the clutch slider. The male spline of the gear includes an axially tapered portion. The clutch slider is slid along the rotary shaft and located so as to fix the gear to the rotary shaft through the hub so that the female spline meshes with the male spline of the gear.

Abstract: A front transaxle device provided to a multi-wheel-driving vehicle comprises an input shaft for receiving power, a pair of left and right front axles supported in the front transaxle device, a differential connecting the left and right front axles differentially, a pinion shaft, a clutch device which engages the pinion shaft with the input shaft and disengages, a rotary object which intervenes between the differential and the pinion shaft, and a brake device which brakes the rotary object. The brake device comprises a piston which can be moved hydraulically, friction objects which engage with each other by the force of the piston, and a mechanism which acts so as to make a constant stroke of the piston from a position when the piston starts moving to a position when the friction objects start engaging with each other regardless of abrasive reduction of the friction objects.

Abstract: A power steering device for a vehicle includes: a wheel-steering generator adapted to be connected to an axle case comprising a differential gear and a pair of right and left axles having a common axis; right and left steering knuckles adapted to be connected to the right and left axles, respectively, to attach right and left steering wheels thereto; right and left tie rods disposed between the right steering knuckle and the right piston rod and between the left steering knuckle and the left piston rod, respectively, to transmit force from the right and left piston rods to the respective steering knuckles, thereby steering the respective wheels; and right and left coupling members which couple the right and left tie rods with the right and left piston rods, respectively.

Abstract: A snow thrower machine having an axle driving unit comprising a housing, consisting of a front housing and a rear housing and containing an axle. Disposed in the housing are a hydraulic pump, which receives power from an engine, a hydraulic motor, which is driven by pressurized oil received from hydraulic pump and a center section, having a pump mounting surface parallel to a joint surface between the front housing and the rear housing. The axle is supported by the front housing below the hydraulic pump and a parking brake system for the axle driving unit is disposed above an expanded portion of the front housing, which contains the axle. The parking brake system is constructed so that a lock pin, supported by the housing, can be engaged with a lock member, fixed onto a motor shaft of the hydraulic motor.