452 results about "Pitman arm" patented technology

An endless track assembly that mounts to a wheeled vehicle. The assembly provides 1) a track suspension having fixed or adjustable, independently biased sets of idler wheels to vary the track contour without affecting track tension, 2) an eccentric bearing housing at a drive sprocket controls track tension, 3) a contoured peripheral edge at the drive sprocket prevents ice and mud buildup, 4) rubber-coated, plastic idler wheels facilitate track movement, 5) a multi-vehicle compatible adapter mounting plate accommodates a variety of vehicles, 6) a rotation limited torsion coupler and / or rotation limiting coupler arms prevent track contact with the vehicle, 7) a locking steering arm coupler prevents loss of steering control, and 8) shaped track lugs and channels clear and direct debris away from the track suspension and drive assembly. The improved suspension particularly supports sets of idler wheels in pivotal relation to the track support frame and resiliently biases a pre-tensioned rocker arm that links adjacent suspension arms mounted to the adjoining idler wheels. Suspension arm movement induces expansion and contraction of tension springs coupled to the rocker arms to augments shape changes at the track contact surface to optimize traction and steering control.

A surfboard-based powered water craft is propelled by gas or electric power plant. A water jet pump supplies water under pressure, which is exhausted through a steering nozzle. A steering shaft, carried by the surfboard-based body, pivots in response to movement of a steering arm. The steering arm pivots about a vertical axis and a horizontal axis. The weight of the power plant is carried forward the center, whereby a rider on top of the surfboard based body tends to balance the weight of the power plant.

A motorized pallet truck includes an angular indicator on the steering arm mechanism providing an internal controller with an angular position of the steering arm or tiller. The controller applies a brake when the tiller is in either of a substantially vertical or substantially horizontal position, limits the speed of the truck for a predetermined rotational movement from the vertical position, and allows full speed of the vehicle when the tiller arm is pulled into a predefined fast driving arc.

An independent strut suspension utilizes upright twin spindles and a spindle cap linked to the spindles that translates vertically along the spindles as the suspension moves over uneven terrain. An upright strut shaft is mounted in a strut journal for axial and rotational movement with respect to the journal. A steering arm is connected for rotation about the strut shaft axis, and the strut shaft moves axially with respect to the steering arm as the frame moves over the uneven terrain. The upright spindles connect the steering arm and the upper mount, and a spring is supported between the upper end of the strut shaft and the upper mount and provides cushioning for the wheel support as the strut shaft moves axially in the journal.

An endless track assembly that mounts to a wheeled vehicle. The assembly provides 1) a track suspension having fixed or adjustable, independently biased sets of idler wheels to vary the track contour without affecting track tension, 2) an eccentric bearing housing at a drive sprocket controls track tension, 3) a contoured peripheral edge at the drive sprocket prevents ice and mud buildup, 4) rubber-coated, plastic idler wheels facilitate track movement, 5) a multi-vehicle compatible adapter mounting plate accommodates a variety of vehicles, 6) a rotation limited torsion coupler and / or rotation limiting coupler arms prevent track contact with the vehicle, 7) a locking steering arm coupler prevents loss of steering control, 8) shaped track lugs and channels clear and direct debris away fromthe track suspension and drive assembly, and 9) a center, spring biased coupling suspension stabilizes and enhances the contour following and load handling capabilities in the center region of the track. The improved suspension particularly supports sets of idler wheels in pivotal relation to the track support frame and resiliently biases a pre-tensioned rocker arm that links adjacent suspension arms mounted to the adjoining idler wheels. Suspension arm movement induces expansion and contraction of tension springs coupled to the rocker arms to augments shape changes at the track contact surface to optimize traction and steering control.

An assembly for converting a motorcycle from a two wheel vehicle into a three wheel vehicle having alternate left and right side front wheels. The assembly is constructed to cooperate with an underlying motorcycle frame without physically altering the underlying motorcycle frame. The assembly includes a center frame assembly that is securable to the underlying motorcycle frame and which aligns a support tube of the assembly with a passage defined by a head tube of the motorcycle frame. Respective A-arm assemblies are pivotably secured to alternate lateral sides of the center frame assembly and a steering arm is pivotably attached to each A-arm assembly. A tie rod extends inboard from each steering arm to an area bounded by the center frame assembly and operatively cooperates with a steering shaft that passes through the head tube and the support tube to effectuate turning of the left and right side front wheels.

A device for receiving and pushing hardenable material through a channel defined by a mold of the device to form a curb having an outer surface, and an attached steering assembly consisting of a steering arm coupling wheel supports attached to the device, and adjustment assembly associated with the steering arm and the device for defining different turning radiuses of the wheel supports.

A mounting apparatus for remotely adjusting the tilt and heading of cell antennas. Antenna tilt is provided by the cooperation of a hinged lower tilt bracket and an upper tilt bracket connected to the antenna by links. The upper tilt bracket is mounted to a vertically translating dust cover. Vertical motion of the dust cover is translated to tilting motion of the antenna by the links. Heading adjustment may be provided uniformly to entire sectors of antennas using a Pitman arm arrangement, or may be provided to each cell antenna individually using a helix heading adjustment apparatus.

The present invention relates generally to portal axle gears. Embodiments of the invention provide for full-floating portal gear axles and an indexed steering arm. The full floating portal axle, for example, displaces vehicular weight from the portal gears onto bearings within the portal axel.

An endless track assembly that mounts to a wheeled vehicle. The assembly provides 1) a track suspension having fixed or adjustable, independently biased sets of idler wheels to vary the track contour without affecting track tension, 2) an eccentric bearing housing at a drive sprocket controls track tension, 3) a contoured peripheral edge at the drive sprocket prevents ice and mud buildup, 4) rubber-coated, plastic idler wheels facilitate track movement, 5) a multi-vehicle compatible adapter mounting plate accommodates a variety of vehicles, 6) a rotation limited torsion coupler and / or rotation limiting coupler arms prevent track contact with the vehicle, 7) a locking steering arm coupler prevents loss of steering control, 8) shaped track lugs and channels clear and direct debris away from the track suspension and drive assembly, and 9) a center, spring biased coupling suspension stabilizes and enhances the contour following and load handling capabilities in the center region of the track. The improved suspension particularly supports sets of idler wheels in pivotal relation to the track support frame and resiliently biases a pre-tensioned rocker arm that links adjacent suspension arms mounted to the adjoining idler wheels. Suspension arm movement induces expansion and contraction of tension springs coupled to the rocker arms to augments shape changes at the track contact surface to optimize traction and steering control.

The present invention relates to the traveling and steering mechanism of shuttle car with rubber wheels. The traveling and steering mechanism has structure comprising a steering rack, wheels, a traveling motor, a traveling speed reducer, a wheel side speed reducer, a sync shaft, a long transmission shaft, a short transmission shaft, a transverse pull rod, a longitudinal pull rod, a steering oil cylinder, a steering block, and steering head, an upper steering arm and a lower steering arm. It has the traveling mechanism designed through combining the traveling motor, the traveling speed reducer and other parts, and the steering mechanism of link rod type. It has small turning radius, can in-site turning and is suitable for shuttling operation in the narrow underground room. It possesses the advantages of integral linkage, compact structure, convenient operation, etc.

A motorized pallet truck includes an angular indicator on the steering arm mechanism providing an internal controller with an angular position of the steering arm or tiller. The controller applies a brake when the tiller is in either of a substantially vertical or substantially horizontal position, limits the speed of the truck for a predetermined rotational movement from the vertical position, and allows full speed of the vehicle when the tiller arm is pulled into a predefined fast driving arc. The controller further limits the rate of acceleration of the truck when the truck is transitioned between a slow and a fast mode of operation to prevent rapid acceleration in the speed of the truck during the transition.

An endless track assembly that mounts to a wheeled vehicle. The assembly provides 1) a track suspension having fixed or adjustable, independently biased sets of idler wheels to vary the track contour without affecting track tension, 2) an eccentric bearing housing at a drive sprocket controls track tension, 3) a contoured peripheral edge at the drive sprocket prevents ice and mud buildup, 4) rubber-coated, plastic idler wheels facilitate track movement, 5) a multi-vehicle compatible adapter mounting plate accommodates a variety of vehicles, 6) a rotation limited torsion coupler and / or rotation limiting coupler arms prevent track contact with the vehicle, 7) a locking steering arm coupler prevents loss of steering control, and 8) shaped track lugs and channels clear and direct debris away from the track suspension and drive assembly. The improved suspension particularly supports sets of idler wheels in pivotal relation to the track support frame and resiliently biases a pre-tensioned rocker arm that links adjacent suspension arms mounted to the adjoining idler wheels. Suspension arm movement induces expansion and contraction of tension springs coupled to the rocker arms to augments shape changes at the track contact surface to optimize traction and steering control.

A pumping unit that removes fluid from a well includes a base disposed on a foundation adjacent the well. A group of support posts is mounted on the base and extends upwardly to a center bearing, and is connected to the center bearing. A walking beam is pivotally mounted on the bearing. A Pitman arm is pivotally connected to the walking beam rearwardly of the center bearing, and extends downwardly to a crank assembly. The crank assembly is mounted on the base centrally beneath the Pitman arm, and is pivotally connected to the Pitman arm. A gear reducer is mounted on the side of the crank assembly, and a drive unit is mounted on the base and is connected to the gear reducer. Actuation of the drive unit actuates movement of the gear reducer, crank assembly, Pitman arm, and the walking beam to pump the fluid from the well.

A motorized pallet truck includes an angular indicator on the steering arm mechanism providing an internal controller with an angular position of the steering arm or tiller. The controller applies a brake when the tiller is in either of a substantially vertical or substantially horizontal position, limits the speed of the truck for a predetermined rotational movement from the vertical position, and allows full speed of the vehicle when the tiller arm is pulled into a predefined fast driving arc.

An independent strut suspension utilizes upright twin spindles and a spindle cap linked to the spindles that translates vertically along the spindles as the suspension moves over uneven terrain. An upright strut shaft is mounted in a strut journal for axial and rotational movement with respect to the journal. A steering arm is connected for rotation about the strut shaft axis, and the strut shaft moves axially with respect to the steering arm as the frame moves over the uneven terrain. The upright spindles connect the steering arm and the upper mount, and a spring is supported between the upper end of the strut shaft and the upper mount and provides cushioning for the wheel support as the strut shaft moves axially in the journal.

A mounting apparatus for remotely adjusting the tilt and heading of cell antennas. Antenna tilt is provided by the cooperation of a hinged lower tilt bracket and an upper tilt bracket connected to the antenna by links. The upper tilt bracket is mounted to a vertically translating dust cover. Vertical motion of the dust cover is translated to tilting motion of the antenna by the links. Heading adjustment may be provided uniformly to entire sectors of antennas using a Pitman arm arrangement, or may be provided to each cell antenna individually using a helix heading adjustment apparatus.

A self-propelled windrower includes a rear axle having end sections which are adjustable to vary the tread width of caster-mounted rear wheels having upright spindles mounted for swiveling within cylindrical receptacles defining outer ends of the axle end sections. Front wheels of the windrower are steerable and a steering assist is provided including right and left steering cylinders having barrels respectively mounted to right and left reaction arms by a mounting permitting the cylinder to pivot vertically and horizontally, with the rods being coupled to respective steering arms fixed to the top of the spindles. In a first embodiment, right and left brackets are respectively fixed to forward surfaces of opposite end regions of a tubular center section of the rear axle in which the axle end sections are received for telescopic adjustment. The right and left reaction arms are respectively mounted to the right and left brackets when the end sections are in inward narrow tread width positions, and are respectively mounted to forward surface locations of outer end regions of the axle end sections when the latter are in outward wide tread width positions. In a second embodiment, the reaction arms are mounted to spindle receptacles at the outer ends of the axle sections such that the reaction arms may be secured in an infinite number of angular positions about the spindle receptacles so as to accommodate different tread widths of the steered rear wheels and / or different machine configurations and / or improved access to the machine without interference with other parts, other attachments, or for any other reasons.

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.

A steerable machinery trailer (1) has a chassis (2, 33, 35, 36) intermediate a pivotal towing attachment (26, 29, 30, 46) and trailer wheels (3) proximate a rear portion of the chassis. The trailer wheels have pivotal attachment to the trailer and are pivotal for steering with a steering shaft (4) that is length-controllable intermediate rigid positioning on the chassis and a steering arm (6) attached to a steering rod (7) that is connected to a pivotal attachment of the trailer wheels to the chassis. Separately and optionally from being pivotal on the pivotal towing attachment by wheel-following of the trailer wheels, the chassis is pivotal on the pivotal towing attachment with a positioning shaft (8) that is length controllable intermediate rigid positioning on the chassis and a rigid lateral attachment (5, 9) to the towing vehicle. Length changes of the steering shaft steer the trailer wheels to guide the rear portion of the trailer from-side-to-side for selective turn-positioning of the trailer wheels. Length changes of the positioning shaft position the trailer laterally from-side-to-side for selectively side-towing of the trailer. Length changes of the steering shaft and the positioning shaft are controllable from a remote position with hydraulic-cylinder motors (39), electrical motors (41) and / or mechanical linkages.

The invention discloses a single-drive four-wheel steering mechanism based on a screw and a nut. The single-drive four-wheel steering mechanism comprises an electromotor, the screw, a transverse bar arranged longitudinally, and a front shaft, a rear shaft, a front tie rod and a rear tie rod which are arranged horizontally, wherein the transverse bar is located between the front tie rod and the rear tie rod; an output shaft of the electromotor is connected with the screw; the screw is matched with a screw hole formed in the transverse bar; sliding chutes are respectively formed in two ends of the transverse bar and respectively sleeve limit rods in the middles of the front tie rod and the rear tie rod; two ends of the front tie rod and the rear tie rod are respectively hinged to an approximate V-shaped steering arm; the other ends of the four approximate V-shaped steering arms are respectively and fixedly connected with axles of four wheels; the four approximate V-shaped steering arms are respectively hinged to two ends of the front shaft and the rear shaft at bending parts of the arms; the front shaft and the rear shaft are fixed on a car frame. The power adopted by the steering mechanism is input from the middle part, so that all components are stressed uniformly, the four wheels are steered simultaneously, the turning radius is shortened, and the flexibility of turning is improved.

A windrower having an adjustable axle to vary a width of steerable caster-mounted rear wheels operably connected by right and left steering cylinders mounted to right and left reaction arms pivoted to respective rods coupled to steering arms fixed to respective spindles mounted within a cylindrical receptacle at outer ends of the adjustable axle. One embodiment each reaction arm has a bracket coupled to a fixed portion of the rear axle when telescopic end sections of the axle are in a narrow width position, and selectively mounted to outer ends of the telescopic end sections of the axle when in a wide width position. A second embodiment has the reaction arms mounted to spindle receptacles at outer ends of the axle sections to provide the reaction arms with an infinite number of angular positions about the spindle receptacles for different tread widths of the steered rear wheels.

An all terrain vehicle has a frame carried by a group of wheels. At least one of the wheels is steerably connected to the frame. A steering handle assembly is rotatably connected to the frame. A servo valve has an input shaft connected to the steering handle assembly and an output shaft connected to a pitman arm. A linkage extends from the pitman arm to the steerable wheel or wheels. A pump draws fluid from a reservoir and passes the fluid through the servo valve before the fluid is returned to the reservoir. The servo valve redirects at least a portion of the flow to a cylinder to drive a ram within the cylinder in response to steering movement of the steering handle assembly. The ram, in turn, provides a power assist to the steerable wheel or wheels. A variable speed, constant displacement pump can be used to vary the flow rate in a manner that reduces the flow rate as the vehicle speed increases. Alternatively, a bypass can be used to vary a flow rate through the servo valve. A damping valve arrangement also can be provided to absorb shocks to the steering system such that the wheels can initially deflect and then return to the original position without substantial input from the steering handle assembly.

A steering apparatus includes: an output shaft that outputs a steering force to wheels of a vehicle; a steering arm which turns about the output shaft, and to which two tie rods, to which the wheels are respectively connected, are attached; a stopper which is provided in a vicinity of the output shaft, and restricts an angle of the turning of the steering arm; a worm wheel that is fixed to the output shaft; a worm that is driven by a motor, and meshes with the worm wheel; a bearing that rotatably support the worm; a housing that holds the bearing; and a worm damper that is provided at an axial inner side or an axial outer side of the bearing in an axial direction of the worm, and is elastically deformable so as to move the worm in the axial direction, as defined herein.

The invention relates to a hydraulic motor driving steering system based on a full hydraulic steering device. The hydraulic motor driving steering system comprises a terminal executing module, a full hydraulic steering device, a power module and an operation and control module. A driver operates a signal input device to form a steering instruction signal; a steering sensor measures a hydraulic motor rotating signal; after the two signals are compared and amplified through a rotary speed controller, control current is output and is used for controlling the switching-on / off of an electric-hydraulic servo valve; and corresponding pressure oil is output by a hydraulic pump to drive a hydraulic motor to steer, so as to form closed-ring control of a rotary speed of the hydraulic motor. The hydraulic motor drives the full hydraulic steering device and the hydraulic pump outputs certain quantity of hydraulic oil through the full hydraulic steering device to push a piston rod of an oil cylinder to retract and pull a steering arm connected with wheels, so that the wheels are turned and a vehicle is steered. Oil liquid power transmission and power cable signal transmission in the steering system are not limited to directions, and a hydraulic hose and a power cable, which realize oil liquid movement, have relatively good flexibility, so that a steering operation part and the full hydraulic steering device are arranged at different positions of the vehicle and remote or wireless operation of steering is realized.