Abstract: A working vehicle with a traversing system wherein a front wheel is installed on a swing member rotatable about a vertical axis relative to a body and including a rotating cylinder for rotating the swing member. The entire part of the front wheel is formed compact in connection with a drivingly running device stored in the swing range of the front wheel. A battery mountable on the body comprises a wide front part movable in the vehicle longitudinal direction between rear wheels in the straight forward running attitude. A narrow rear part is positioned between the rear wheels in the transverse running attitude, whereby the attachment and detachment of the wheel can be preformed easily and can be mounted stably.

Abstract: Method and arrangement for operating self-steering wheels on a non-driving axle (3) in a vehicle, which wheels (1, 2) are each mounted on their own stub axle (4, 5) and connected to a tie rod (8). The axle (3) and one (4) of the stub axles are connected by a cylinder (12) with two separate chambers (16, 17), each chamber having an individually adjustable piston (22, 23), the cylinder (12) having a first, freely movable state, in which its length is variable, and a second, pressurized state, in which its length (S3) is fixed, and in that each chamber (16, 17) has at least one connection (18, 19, 20, 21) for pressure medium for acting on the respective piston (22, 23) in the cylinder (12).

Abstract: A vehicle includes a chassis supporting two front axle assemblies and two rear axle assemblies. Each of the front and rear axle assemblies includes an extendible and retractable axle supporting an independently steerable wheel and a steering mechanism. The axles of the respective front and rear axle assemblies are offset from each other. By providing independently steerable wheels, the vehicle is operable in a plurality of steering modes including two-wheel steer, crab steer and coordinated steer. A steering angle for each steering wheel is determined according to a steering angle of an inside front wheel on a turn-by-turn basis.

Abstract: A four-wheel steering system includes a frame that carries an axle that rotationally mounts a pair of front wheels via a pair of front pivotal wheel support assemblies. For steering, the front pivotal wheel assemblies are pivotal with respect to the axle. The frame also carries a pair of rear wheels that are rotationally mounted to the frame via a pair of rear pivotal wheel support assemblies. For steering, the rear pivotal wheel assemblies are pivotal with respect to the frame about vertical axes. The front pivotal wheel support assemblies are connected together by a front axle tie rod. Steering by an operator causes expansion or contraction of a hydraulic cylinder arranged between one front pivotal wheel support assembly and the axle, causing selective pivoting of both front pivotal wheel support assemblies.

Abstract: A steering system for rear wheels of a trailer for more easily and precisely steering a back end of the trailer when the trailer is moving in a reverse direction. The steering system for rear wheels of a trailer includes a steering assembly mountable on the trailer for pivotally moving the rear wheels of the trailer. A joining member is provided for joining the steering assembly to the cab of the semi-truck. A first end of the joining member is operationally coupled to the steering assembly and second end of the joining member is operationally coupled to an actuator assembly for actuating the joining member.

Abstract: A power machine including a transmission, a chain case, a motor and a hydraulic cylinder having a rod end and a base end and a plurality of hose couplings. The hydraulic cylinder coupled to a chain case such that the base end and all of the hose couplings are mounted within an interior portion of the chain case and such that the rod end of the hydraulic cylinder extends outside the chain case.

Abstract: An electric power steering apparatus being provided with: a torque sensor 10 for detecting a steering torque applied to a steering wheel (not shown); and a steering assisting motor 24 driven by a drive circuit 13 to which the voltage of a mounted battery P is applied, in which the drive circuit 13 rotates the motor 24 in accordance with a motor current instruction value determined based on the steering torque detected by the torque sensor 10, is further provided with: judging means 12 for judging whether the motor current instruction value is higher than a first threshold value or not; boosting instruction outputting means 12 for, when the judging means 12 judges that the motor current instruction value is higher, outputting a boosting instruction for boosting the voltage of the mounted battery P; and a boosting circuit 8d for boosting the voltage of the mounted battery in response to the outputted boosting instruction.

Abstract: An improved grain cart is able to hold more grain with reduced field compaction to derive greater yield from a farm field. The grain cart includes a frame which supports a grain hopper and is supported by a plurality of wheels, some of which are steerable so the cart also has an acceptable turning radius.

Abstract: A hydraulic power steering apparatus for a vehicle is provided with a main control valve in which a valve opening degree is controlled on the basis of a relative movement between an input shaft interlocking with a steering wheel and an output shaft interlocking with a steering mechanism for turning a steered wheel, a power cylinder mechanism generating a steering assist force, a pump apparatus discharging a fixed flow amount of working oil, a first flow passage including a supply passage communicated with the main control valve, and a control unit controlling an assist control valve. The main control valve controls a supply amount of the working oil in the first flow passage to the power steering apparatus, and the assist control valve controlling a flow amount of a part of the working oil discharged from the pump apparatus is controlled to a set valve opening degree set on the basis of a vehicle speed and an oil pressure of the working oil in the first flow passage, by the control unit.

Abstract: The invention consists of an offset kingpin in the rear steering axle of a self-propelled combine harvester. Attached to the rear axle is a knuckle. The kingpin is pivotally attached to the knuckle and the spindle is rotationally attached to the knuckle. The kingpin is positioned forward of the spindle allowing the rear tires equal clearance with the combine side shielding. This positioning of the kingpin relative to the spindle improves the turning radius of the combine. It also aids tire stability at road speeds.

Abstract: A steering system (11) reduces the steering radius and minimizes tire scuffing is used with vehicles which include a front steering assembly having first and second wheels (20a, 20b) and a tag axle steering assembly having third and fourth wheels (21a, 21b). The steering system comprises a front steering ram assembly (26) fluidly coupled to a tag axle ram assembly (30) through a conduit system (102), which has no flow control valves, in a master-slave configuration such that a hydraulic fluid moves between the steering axle assembly and the tag axle ram assembly in response to a turning of the first and second wheels to cause the third and fourth wheels to turn in an opposite direction. The front steering ram assembly comprises first and second ram (42, 44). The first and second ram cylinders (46, 52) are normally affixed to either the frame (40) or the first tie rod (36), while the first and second ram shafts (50, 56) are affixed to the other of the frame and the first tie rod.

Abstract: The system for guided steering of a set of rear wheels of a semi-trailer comprises a pulling vehicle and a semi-trailer having rear wheels which are turnable with respect to a chassis of the trailer to turn from a neutral position to one or the other side of the semi-trailer for generating steering of the vehicle in one direction with respect to a neutral position. The system further comprises power generating apparatus to act on the rear wheels to generate turnings of the rear wheels, activating apparatus mounted in the driver's cabin of the vehicle for operation by the driver of the vehicle for generating a steering of the rear wheels independently of the steering of the vehicle as well as locking structure operated from the driver's cabin, in a first position for generating locking of the rear wheels in the neutral position, and switchable from the first position to a second position, where the rear wheels are released and brought to turn by activation of the activating apparatus.

Abstract: A power steering apparatus for an electric vehicle has a steering mechanism for steering a pair of steered wheels upon receiving assist power from a steering assist-power according to a steer force required for steering the steered wheels. A fluid pressure pump driven by an electric motor supplies pressurized fluid to the steering assist-power mechanism. An electric motor controller stops the electric motor when the electric-source voltage detected by an electric source voltage detector is greater than or equal to a voltage set value and when the steer angle detected by a steer angle detector is smaller than a steer angle set value, and prohibits stopping the electric motor when the electric-source voltage is smaller than the voltage set value. Therefore, it becomes possible to ensure the steering responsiveness under an electric voltage lowered condition while avoiding the disturbance to the electric source.

Abstract: A gearbox is provided with a selector shaft, which is capable of reciprocating movement for selecting the selector slot and rotating movement for changing gears. A gear lever is connected to a first constructional member, provided with a first and a second coupling point, which are positioned on one side of a first axis and on either side of a second axis, and a third coupling point, positioned on the second axis. The selector shaft is provided with a second constructional member, with two coupling points positioned one either side of an axis of rotation, and a further coupling point. The coupling points on the first constructional member and the coupling points on the second constructional member are interconnected and the third coupling point is connected to the further coupling point. The connections are made up of a power transmission which can only transmit forces being exerted in one direction. This reduces play and results in a lighter, more compact selector mechanism.

Abstract: Front and rear wheeled units (13, 14) of vehicle are connected together for articulated steering. Wheels on at least one unit are mounted for swivelling relative to the respective unit to provide kingpin steering in combination with articulation steering. A first embodiment has front and rear kingpin steering and articulation steering performed manually and independently of each other. In a second embodiment, a steering integrator cooperates with actuators (162, 163, 212, 213, 236, 237) which control at least the articulation steering and kingpin steering of the front wheels (22, 23) to automatically integrate two types of steering so that a controlled relationship exists between an articulation angle of the front unit (13) with respect to the rear unit (14), and swivel angles of the front wheels (22, 23) with respect to the front unit (13). A manual steering control, e.g. a steering wheel (186), controls actuation of the steering integrator.

Abstract: A vehicle having a hydrostatic drive and transmission having multi-range speed modes, a counter configured steering assembly providing for a turning radius less than would normally be commensurate with the length of the wheel base, and a suspension system having a resiliently deformable device for maintaining stability of the vehicle body and cargo during operation and for maximum operator comfort.

Abstract: A power steering system for a vehicle having a gear box and an intermediate shaft connected thereto, includes first and second sensors for detecting a speed of the vehicle and a pressure within a cylinder connected to the gear box, and a limiting mechanism for limiting the steering force of the vehicle according to the detection by the first and second sensors.

Abstract: An automatic rear wheel self-centering device for four-wheel steering vehicles automatically performs the rear wheel self-centering operation when the steering mode of the vehicle returns from another steering mode to the standard steering mode. The device has a branch conduit branched from a conduit leading from the steering unit to the steering mode selection valve. A conduit control valve is mounted to the branch conduit and is changeable between a neutral position blocking the branch conduit, a first position connecting the branch conduit to one side chamber of the rear wheel steering cylinder and a second position connecting the branch conduit to the other side chamber of the cylinder. The spool of the conduit control valve moves synchronous with a linear movement of the piston of the rear wheel steering cylinder, thereby changing the position of the conduit control valve between the above three positions.

Abstract: A steering control apparatus is disclosed for a first and second pair of wheel assemblies that are mounted for rotation with respect to a first and second axle. Selective rotation of the respective wheel assemblies is controlled by a plurality of actuators defined by a control module. The actuators are engaged by a control lever that is mounted for movement with respect to the control module in a preselected plane. The control module is rotatable with respect to the preselected plane to allow selective contact between the actuators and the control lever to control the rotation of the wheel assemblies with respect to the axles in one of a plurality of steering modes.

Abstract: A four-wheel steering system for a vehicle including a front wheel Steering part having a front direction control valve having ports which close and open in accordance with a rotating direction of a steering wheel, and a front actuator for pushing or pulling a tie rod connected to a front wheel, an electronic control unit for controlling a steering of the rear wheels in response to signals transmitted from a vehicle speed sensor, a steering angle sensor and a steering amount feedback sensor, and a rear wheel steering part having first and second solenoid valves independently controlled by said electronic control, first and second rear direction control valves independently controlled by said electronic control unit and first and second rear wheel actuators for pulling or pushing said rear wheels selectively or simultaneously.

Abstract: Known all wheel steer arrangements use standard spool-type valves which are inherently subject to leakage that results in the front and rear wheels getting out of synchronization due to the leakage. In the subject invention, a hydraulic system has front and rear pairs of steerable wheels respectively interconnected by front and rear fluid actuated mechanisms. A steering valve delivers pressurized fluid to the front fluid actuated mechanism for steering of only the front pair of wheels and to both the front and rear fluid actuated mechanisms to steer the front and rear pairs of wheels simultaneously but in opposite directions. Furthermore, a rear steer valve mechanism is provided to independently direct pressurized fluid to the rear fluid actuated mechanism to steer the rear pair of wheels independent of the front pair of wheels.

Abstract: A power assisted steering system, in particular, for motor vehicles, contains a servomotor (2), a servopump (3), a tank (4), a control valve (1) with a controllable feedback device (5), and a control member (46) whose choke cross section can be altered as a function of the vehicle speed. Control valve (1) is made as a four-way valve and has a supply connection (22, 23), a feedback connection (7), and two working connections (8, 10) for the lines (11, 12) that lead to the two working chambers of servomotor (2). Between feedback device (5) and supply connection (22, 23), there is arranged a device (13) for piling up the pressure medium stream and the device is made according to one practical example as a choke (50, 51). With the help of this choke (50, 51), one can achieve a hydraulic centering component in addition to a mechanical centering component.

Abstract: A rear suspension for a four-wheel steering system, has a wheel carrier for rotatably supporting a wheel. There is a subframe mounted on a lower portion of a vehicle body with a plurality of links for connecting the subframe to the wheel carrier. Also included is a hydraulic bushing device formed on a mounting portion of the subframe, and a hydraulic control device for controlling a steering angle of the rear wheel by feeding hydraulic fluid to the hydraulic bushing device in accordance with vehicle speed and a front wheel steering angle.