Abstract: A multi-mode hydro-mechanical hybrid transmission device includes an input member, a hydraulic transmission mechanism, a mechanical transmission mechanism, a convergence mechanism, an output member, a clutch assembly, and a brake assembly. The clutch assembly connects an output end of the input member to an input end of the hydraulic transmission mechanism, the mechanical transmission mechanism, and the convergence mechanism. The clutch assembly connects an output end of the hydraulic transmission mechanism to the convergence mechanism. The clutch assembly connects the mechanical transmission mechanism to the convergence mechanism. The convergence mechanism is connected to the output member. Continuously changing transmission ratios are provided between the input member and the output member by adjusting a displacement ratio of the hydraulic transmission mechanism and selectively controlling engagement of the clutch assembly and the brake assembly.

Abstract: A construction machine traveling control system is provided. The construction machine traveling control system includes first and second electric traveling pedals for outputting manipulation values including electric signals in response to the driver's manipulation and thereby operating first and second traveling motors connected thereto, respectively; a traveling pattern input means installed in the driving room so as to enable the driver to input a construction machine traveling pattern; a controller electrically connected to the first and second electric traveling pedals and to the traveling pattern input means; and a hydraulic circuit electrically connected to the controller so as to control the flow rate of operation oil supplied to the first and second traveling motors, as well as the flow of the operation oil, according to the command values delivered from the controller.

Abstract: Power assisted steering systems provide a gear reduction of approximately 25:1 between a steering wheel and a steering mechanism and approximately 625:1 between an electric motor and a steering mechanism. The system is back-driveable from the steering mechanism. In one embodiment, the gear reduction is provided primarily by three planetary gear sets, with the remainder provided by axis transfer gearing. In another embodiment, the gear reduction is provided primarily by a cycloidal gear set, with the remainder provided by axis transfer gearing.

Abstract: An electric axle drive has a transmission arrangement with two gears, with an electric machine for driving two output shafts of the axle of the motor vehicle, a first spur gear stage which can be driven by the electric machine for driving an intermediate shaft and a planetary carrier of a planetary gear mechanism, which planetary carrier is connected fixedly to the intermediate shaft and receives planetary gears, and with an internal gear of the planetary gear mechanism for driving a second spur gear stage, a sun gear of the planetary gear mechanism and shifting elements for shifting the two gears. A first shifting element is configured as a clutch, by way of which the internal gear and the sun gear or the internal gear and the planetary carrier or the sun gear and the planetary carrier can be connected in a torque-transmitting manner.

Abstract: A drive apparatus driven by a prime mover and having a variable speed transmission disposed within a housing is disclosed. A power take off is driven by an output shaft of the prime mover and selectively drives a power take off output shaft. The variable speed transmission drives a transmission output shaft, which in turn drives a first clutch mechanism and a second clutch mechanism. A first drive axle is engaged to and selectively driven by the first clutch mechanism and a second drive axle is engaged to and selectively driven by the second clutch mechanism.

Abstract: A drive apparatus driven by a prime mover that has a prime mover output shaft is disclosed. The drive apparatus has a housing and a power take off. The power take off is driven by the prime mover output shaft and selectively drives a power take off output shaft. The drive apparatus further has a variable speed transmission disposed within the housing. The variable speed transmission drives a transmission output shaft, which in turn drives a first clutch mechanism and a second clutch mechanism. A first drive axle is engaged to and selectively driven by the first clutch mechanism and a second drive axle is engaged to and selectively driven by the second clutch mechanism.

Abstract: A system, method, and computer program product for detecting and compensating for a traction steer event is provided. A first wheel speed of a first driven wheel is compared with a second wheel speed of a second driven wheel to determine whether a wheel slip condition has occurred. If a wheel slip condition is determined to have occurred, a current operating state of a vehicle is compared to an expected operating state of the vehicle to determine if a traction steer event has occurred. If a traction steer event is determined to have occurred, brake pressure is selectively applied to the first or second driven wheel to compensate for the traction steer event.

Abstract: In a working vehicle, a control unit is configured to control an engine based on an engine power curve indicating a relationship between an engine speed and an engine output torque. The control unit is further configured to calculate an absorption horsepower that is an absorption horsepower of a hydraulic pump and to change the engine power curve used to control the engine based on the absorption horsepower.

Abstract: A steering system for a vehicle wherein the first and second axle shafts are driven by a power shaft powered by an engine. A differential gear is interposed between the power shaft and the first and second axle shafts. The steering system has a first hydraulic unit associated with the first axle shaft, a second hydraulic unit associated with the second axle shaft, a hydraulic circuit connecting an input of the first hydraulic unit to an output of the second hydraulic unit and an output of the first hydraulic unit to an input of said second hydraulic unit. A control unit is connected to the hydraulic circuit for varying a flow rate of hydraulic fluid in the first and second hydraulic units and an actuator associated with the control unit for controlling said control unit. The actuator is responsive to rotation of a steering wheel.

Abstract: A work vehicle including an engine and a transmission operatively engaging the engine. The transmission has at least one input shaft and at least one output shaft, wherein a ratio of a rotational speed of the output shaft with respect to a rotational speed of the input shaft may be changed by said transmission. The work vehicle further includes a cutter drum operatively engaging said transmission and a controller, wherein the controller selects the transmission ratio based on an input of a user of the work vehicle.

Abstract: A hydraulic motor assembly having a motor and gear reduction set mounted in a housing. A brake assembly may be mounted in the port block to provide braking for the output axle or it may be located externally to the axle housing portion of the assembly. The housing may be formed of separate components, including the external surface of the ring gear and the hydraulic motor port block.

Abstract: A hydraulic motor assembly having a motor and gear reduction set mounted in a housing. The housing may be formed of separate components, including the external surface of the ring gear and the hydraulic motor port block. The motor assembly may also include pressure relief valves or neutral valves in the motor port block and a brake assembly mounted in the port block or on the motor housing to provide braking for the output axle.

Abstract: A hydraulic and mechanical composite continuously variable transmission (HMT) is disclosed. The HMT includes a hydraulic continuously variable transmission (HST) and a mechanical speed change mechanism using a group of planetary gears as the differential part. The output rotation of the HST and the rotation of the input part of the mechanical speed change mechanism that receives power from the engine are transmitted to the differential part which translates the rotation to a speed change output shaft. The speed change input part is formed at one end of a pump shaft and the differential input part is coaxially formed at the other end thereof. Further, the operator may manually set the speed ratio via electrical means on the mechanical speed chance mechanism.

Abstract: A transaxle apparatus provided with a planetary gear type differential The differential comprises a pair of co-axial axles, a sun gear, a center gear serving as a driving input gear, a pair of carriers, a pair of ring gears serving as steering input gears, and planet gears. The center gear interlocks with the sun gear. The pair of carriers are fixedly disposed around the respective axles oppositely to each other with respect to the center gear. The pair of ring gears are rotatably disposed around the respective carriers so as to slidably abut at their inner peripheral surfaces against outer peripheral surfaces of the respective carriers. Each of the ring gears is extended between the sun gear and each of the carriers disposed in the ring gear so as to be inner peripherally formed into an internal gear. Each of the carriers is integrally provided with a plurality of projections projecting toward the center gear between the sun gear and the internal gear.

Abstract: An integral-type transaxle apparatus comprising a single housing in which a pair of driving axles, a differential mechanism for differentially connecting both said driving axles to each other, a driving hydraulic stepless transmission which fluidly connects a hydraulic pump and a hydraulic motor, a steering hydraulic stepless transmission which fluidly connects a hydraulic pump and a hydraulic motor, a mechanical transmission for transmitting outputs of both said hydraulic stepless transmissions to said differential mechanism are accommodated, wherein at least one of said hydraulic stepless transmissions is disposed such that a rotational axis of a pump shaft of said one hydraulic stepless transmission and a rotational axis of a motor shaft of said one hydraulic stepless transmission are perpendicular to each other.

Abstract: A mobile cultural machine including right and left traction members, a transmission, and a main speed change device operable to transmit, at any speed ratio, a driving force from an engine through the transmission to the traction members so that they are driven at any traveling speed. A steerage and a steering devise operate cause the steerage to differentiate the traveling speeds between traction members. The traveling speeds are reduced in response to the extent to which the steering device is operated, so that a machine running straight may smoothly be controlled to enter a spinning turn at the end of a row.

Abstract: A mobile cultural machine including right and left traction members, a transmission, and a main speed change device operable to transmit, at any speed ratio, a driving force from an engine through the transmission to the traction members so that they are driven at any traveling speed. A steerage and a steering device operate to cause the steerage to differentiate the traveling speeds between traction members. The traveling speeds are reduced in response to the extent to which the steering device is operated, so that a machine running straight may smoothly be controlled to enter a spinning turn at the end of a row.

Abstract: A drive unit provided with a power transmission path interlockingly connecting an engine (E) to left and right sprockets (12L, 12R), which are adapted to drive left and right crawlers (11) of left and right traveling parts (1L, 1R), via a non-stage traveling transmission unit (21) and an auxiliary traveling transmission unit (28) capable of changing the speed of a working vehicle in a plurality of stages. The power transmission path is provided with a non-stage steering transmission unit (20), left and right steering transmission units (48L, 48R) and left and right planetary gears (40L, 40R) all of which are adapted to be operated for speed change in accordance with a turning operation of a steering wheel (7). This construction enables a pivot turn and a spin turn of a working vehicle body to be made, the swinging performance of the working vehicle to be improved, the maneuvering of the vehicle to be done easily, and the construction of the drive unit to be simplified.

Abstract: A steering mechanism that controls a drive and steer transmission and that causes the transmission to execute turns in the direction a steering wheel is turned when operating in either the forward or reverse direction of travel. In response to operator engagement of a drive control, an actuation linkage shifts an elongate member within a slot formed in a cam member that pivots in response to turning of a steering wheel. Shifting of the rod member between two positions on either side of the cam member pivot axis causes the drive and steer transmission to steer the vehicle in the desired direction when the vehicle is traveling in both forward and reverse.

Abstract: A mobile agricultural machine has a pair of right and left traction members (2), a transmission (23,24), a main speed change device (68) operable to transmit at any speed ratio a driving force from an engine (21) through the transmission to the traction members so that the traction members are driven at any traveling speeds. The machine further has a steerage (26,27), and a steering device (19) operable to cause the steerage to differentiate the traveling speeds between the traction members (2). The traveling speeds are reduced in response to an extent to which the steering device (19) is operated, so that the agricultural machine running straight for an agricultural work along its running course that is being adjusted may smoothly be controlled merely by a continuous manual operation to make a spinning turn on a bare end of the farm for the next course of the work.

Abstract: A steering mechanism that controls a drive and steer transmission and that causes the transmission to execute turns in the direction a steering wheel is turned when operating in either the forward or reverse direction of travel. In response to operator engagement of a drive control, an actuation linkage shifts an elongate member within a slot formed in a cam member that pivots in response to turning of a steering wheel. Shifting of the rod member between to positions on either side of the cam member pivot axis causes the drive and steer transmission to steer the vehicle in the desired direction when the vehicle is traveling in both forward and reverse.

Abstract: A differential steer and final drive configuration for machines such as small tractors for agricultural and construction purposes and the like, which differential steer and final drive configuration allows passage of a power take-off (PTO) shaft beneath the differential steer mechanism and between the drive axles of the final drive mechanisms such that a PTO output member connected to the PTO shaft can be located on or in the vicinity of the machine front to rear centerline and the drive wheel axis.

Abstract: A driven axle assembly for vehicles has an axle housing with a main drive, wheel hub units fixed to both sides of the axle housing and being driven by a drive shaft with different rotational movements on both sides of the main drive, within each wheel hub unit, a planetary gearing and a multi-plate friction type wet brake both being coupled to the drive shaft as well as to a drive unit of the vehicle, wherein the multi-plate friction type wet brake is arranged within a ring gear support member, and around planetary gears of the planetary gearing a ring gear is connected to them.The improvement achieved by this invention is that a driving assembly is coupled to the ring gear of the planetary gearing of each and every wheel hub unit arranged on the driven axle whereas a difference between the rotational speeds of the ring gear within the wheel hub units, respectively, are proportional to a difference between the rotational speeds of the wheel hub units arranged on the driven axle of the vehicle.

Abstract: A hydro-mechanical steering differential is provided for delivering motive power to right and left output drive members both during straight traveling and during steering. The subject invention includes first and second planetary gear arrangements with a rotatable motor floatingly disposed therebetween. An input member is drivingly connected to both a ring gear of the first planetary gear arrangement and a planet carrier of the second planetary gear arrangement. A sun gear of the first planetary gear arrangement is connected to both the left output drive member and a drive unit of the rotatable motor. A driven unit of the rotatable motor and a sun gear of the second planetary are both connected to the right output drive member. The subject arrangement provides, in a compact design, motive power to the right and left output drive members both while traveling straight and during steering without requiring a separate differential lock.

Abstract: Reduction-distribution unit for gearshift units, particularly for industrial machines, including a first hydrostatic motor and a second hydrostatic motor which are operatively associated for the transmission of the motion to the axles. The unit also comprises an epicyclic train which adds the power of the hydrostatic motors, the first motor being associated with the shaft of the sun gear and the second motor being associated with the shaft of the crown gear of the epicyclic train. A first brake and a second brake are respectively associated to the shaft of the sun gear and to the shaft of the crown gear.

Abstract: To increase the top speed of a multi-speed range hydromechanical steering transmission for tracklaying vehicles, the displacements of the hydraulic motors in the two hydrostatic drive units are abruptly destroked from 100% displacement to 80% displacement at the moment the infinitely variable displacements of their respective hydraulic pumps achieve zero displacement during acceleration through the highest forward speed range of the transmission.

Abstract: An infinitely variable driving and steering gear for track-laying vehicles has a hydrostatic/mechanical overlaying steering gear. The mechanism includes a hydrostatic unit and a summation gear train for summing hydrostatic and mechanical input power. The summation gear train has one or more summed power outlet shafts. The drive mechanism also includes a first multiple shaft steering summation transmission that is operably coupled to the summed power outlet shafts and which has left and right steering output shafts. The drive mechanism also includes a second multiple shaft steering summation transmission having respective output shafts that are operably connected to first steering summation transmission. The shafts of the summation gear train of the driving transmission and the shafts of the first steering summation transmission are all coaxially arranged for rotation about a common axis.

Abstract: A tracked vehicle is provided with an epicyclic steering differential interposed between the internal combustion engine and the track drive wheels. A reversible hydraulic motor is operatively associated with the differential for operating the steering of the vehicle. The differential includes a double epicyclic train which divides the torque from the internal combustion engine. The hydraulic motor acts on two elements of the train which are connected for rotation with each other about the central axis of the differential, and which rotate in equilibrium with each other when the vehicle is travelling a straight line.

Abstract: A superposition steering system for a track vehicle includes an infinitely variable steering drive unit integrated with an engine driven mechanical steering input drive to provide a reduction in the amount of power to be transmitted by the variable steering drive to only 20% of the total steering power. The system includes a steering transmission having five epicyclic differential gears and five shift couplings with the differential gears and shift couplings so connected that for shifting from one operating speed to another, in each instance, only one shift coupling is required to be opened and another shift coupling required to be closed. Because of the small number of shift couplings, operating reliability is increased and shifting between various stages can take place quickly to provide high vehicle maneuverability.

Abstract: Improved steering systems are provided for skid-steering vehicles such as military tanks, track-type tractors and the like. A diesel engine may be used to rotate a drive shaft interconnected by port and starboard planetary gear assemblies, to apply driving power simultaneously to both track-drive mechanisms. Steering is provided by port and starboard hydraulically-actuated motors, each positively interconnected with the ring gear or other suitable component of its respective planetary gear assembly, whereby each track-drive mechanism may be controlled separately and independently of the other.