A lift device includes a base, a retractable lift mechanism having a first end coupled to the base, a platform coupled to and supported by a second end of the retractable lift mechanism, and a steering system. The base includes a first wheel and a second wheel laterally spaced from the first wheel, and a third wheel and a fourth wheel laterally spaced from the third wheel. The third wheel and the fourth wheel are both pivotally fixed. The steering system includes a first electric actuator coupled to the first wheel and configured to independently control a steering direction of the first wheel, and a second electric actuator coupled to the second wheel and configured to independently control a steering direction of the second wheel.

A lift device includes a base having two front wheels and two rear wheels, a retractable lift mechanism having a first end coupled to the base, a platform coupled to and supported by a second end of the retractable lift mechanism, and a steering system. The steering system includes a second linear actuator coupled to a first front wheel of the two front wheels and a third linear actuator coupled to a second front wheel of the two front wheels. The two front wheels are spaced from the two rear wheels in a longitudinal direction. The retractable lift mechanism includes a first linear actuator extending along the longitudinal direction and configured to transition the retractable lift mechanism between a stowed position and a deployed position. The second linear actuator and the third linear actuator extend generally along the longitudinal direction.

A vehicle steering system comprises: an input shaft rotatable in response to an input for moving vehicle wheels; a motor generating torque to be supplied to an output shaft through a belt assembly; a gear assembly; a rotary-linear conversion mechanism, and a sector gear; and the rotary-linear conversion mechanism combining rotary motion of the input shaft and the torque transferred from the motor. The torque generated by the motor can be transferred to the output shaft through the belt assembly, the gear assembly, the rotary-linear conversion mechanism, and the sector gear, thereby improving mechanical efficiency, reducing back-drive torque, and providing a multi-stage reduction mechanism to generate required pitman torque from the motor. The combined use of the belt assembly, the gear assembly, the rotary-linear conversion mechanism, and the sector gear enables to the motor to generate required steering torque, while meeting system back-drive performance requirements and current draw power requirements.

A steering system for a vehicle, in particular a utility vehicle, has at least one first steering gear and at least one first steering mechanism for steering at least one first vehicle wheel. The first steering gear is coupled to the first steering mechanism. The steering system has at least one second steering gear and at least one second steering mechanism for steering at least one second vehicle wheel. The second steering gear is coupled to the second steering mechanism. At least one tensioning mechanism is coupled to the first steering gear and to the second steering gear such that the first steering gear and the second steering gear are pre-tensionable with respect to each other, in particular in the idle state and oppositely.

A serrated component (10) for use in a progressive steering gear includes first and second inclined prong ramps (14, 16). The first and second inclined prong ramps (14, 16) include a plurality of prongs (20, 50) each having a first flank angle and a second flank angle with respect to a center plane (48) that extends normal to a longitudinal direction (34) of the serrated component (10). For at least 50% of the prongs (20, 50) of the plurality of prongs (20, 50), the first flank angles have a single first angle value and the second flank angles have a single second angle value, the first angle value corresponding to a reflection of the second angle value at the center plane (48). The invention further comprises a progressive steering gear, a method of manufacturing a serrated component, and a method of manufacturing a steering gear.

An electric power steering device including a first bolt boss of a second housing provided on a first housing side relative to a worm-wheel accommodating portion of the second housing, and has a first female thread portion open on the first housing side and located within a plane area defined by connecting a second pinion shaft, a first bracket hole, and a second bracket hole; and a first bolt boss of the first housing provided to the first housing to be opposed to the first bolt boss of the second housing, and has a first bolt hole located within the plane area defined by connecting the second pinion shaft, the first bracket hole, and the second bracket hole and being formed through the first housing to be continuous with the first female thread portion of the first bolt boss of the second housing.

A steering control device calculates a target angle of a shaft that rotates in conjunction with a turning operation of a turning wheel that is isolated from dynamic power transmission with a steering wheel, depending on a steering state of the steering wheel, and executes a feedback control to cause an actual angle to follow the target angle, for controlling electricity supply to a turning motor to turn the turning wheel, the steering control device including: a first processing unit to execute a process to alter the target angle independently of the steering state of the steering wheel; and a second processing unit to calculate a turning state amount for a guide monitor function to assist traveling of a vehicle, by reducing or removing an influence of an alteration of the target angle on the actual angle of the shaft.

Vehicle steering systems are disclosed. An example apparatus disclosed herein includes a first gear, a first pinion engaged with the first gear, a second pinion fixed to the first gear, a second gear engaged with the second pinion, and a third pinion fixed to the second gear, the third pinion to engage with a steering rack of a vehicle.

A three ball pin-type coupling, having a first connector and a second connector which are non-rotatably connected. The first connector includes a three shaft pin assembly, raceway assemblies and a cage assembly. The three shaft pin assembly includes a shaft and three ball rings which surround the shaft and are arranged at intervals in the circumferential direction of the shaft. There are three raceway assemblies. Each ball ring is connected to a raceway assembly. The cage assembly defines the position of the raceway assemblies in the circumferential direction. The raceway assemblies can provide elastic force between the ball ring and the cage assembly. When the ball ring displaces relative to the cage assembly in the circumferential direction, the two sides of the raceway assemblies in the circumferential direction remain abutted against the cage assembly. A steering mechanism is also provided.

The invention relates to an electrically operated steering system (1) for a vehicle (2) with a rack (3) for attaching the steering system (1) to a vehicle frame of the vehicle (2), two steerable wheels (4) that are pivotably attached to the rack (3), a rod element (5) arranged on the rack (3), which is slidable in its longitudinal direction in relation to the rack (3), a kinematic unit (13) which is coupled to the rod element (5) and which transforms a movement of the rod element (5) into a steering rotation of the wheels (4), an electric machine (6), which is mechanically connected to the rod element (5) for effecting the movement of the rod element (5), and a lateral force absorbing mechanism (7) which is configured for absorbing a lateral force produced by the kinematic unit (13) in relation to the rod element (5). The invention further relates to a vehicle (2) comprising such a steering system (1).