摘要:
The disclosure relates to a steering system useful for providing stable control during rear axle steering of harvesters, such as self-propelled windrowers. The steering system utilizes a single steering cylinder and retracted caster cylinders to regulate rotation of the casters during rear axle road operation mode. The steering system locks the steering cylinder and uses the caster cylinders for damping during in-field operation mode.
摘要:
A hydraulic control system for steering rear caster wheels of a work machine. The control system has a steering mode that proportionally controls the steering of rear caster wheels while compensating the circuit to keep steering performance independent from the load generated by the rear caster wheels, a no steering mode that maintains the position of the rear caster wheels in the absence of a steering command, and a freewheeling mode that permits the rear caster wheels to rotate freely 360°.
摘要:
Steering boxes currently available on the market in order to convert the rotation of the steering wheel into the angular rotation of the wheels are not suitable to be partially built into the rim of the wheels of an electric car. In addition, existing boxes do not allow the independent rotation of the wheels or wide turning radii. These limitations are overcome using a system comprising: a body into which at least one motor is built using corresponding supports, which motor(s) actuate(s) the steering rotation axle of each steered wheel in the upper part of the body, and, in the lower part, a transmission gearbox and a stationary circular crown gear with which driving pinions mesh, said pinions rotating about the crown gear, thereby rotating the entire body and the rotation axle of the wheel built into the body together with suitable means.
摘要:
A ratchet assembly may include a steer ring, a steer ring side structure, a steer cylinder bracket arm, a steer cylinder, a ratchet lock gear, a steering collar, a ratchet cylinder, a ratchet lock bar, and at least one sensor. When in a particular locked position, operation of the steer cylinder rotates the steer ring, the ratchet lock gear, and the steering collar. When in an unlocked position, operation of the steer cylinder rotates the steer ring around the ratchet lock gear.
摘要:
Self-balancing vehicle with at least three wheels resting on the ground, at least two of which wheels are arranged on either side of the center of gravity with respect to the longitudinal axis of the vehicle, and at least one of which wheels is directionally controllable. At least one section of the vehicle is tiltable about the longitudinal axis of the vehicle and a sensor for measuring the magnitude and/or the direction of the load, for the purpose of producing and/or maintaining a change in direction of the directionally controllable wheel during travel, and/or for measuring the magnitude and/or the direction of a change in direction of the directionally controllable wheel during travel, is connected to a control element for controlling the at least one directionally controllable wheel. A power-assisted tilt element is provided for tilting the vehicle section about the longitudinal axis of the vehicle, which tilt element is connected to the sensor, in order to produce a tilt as a function of the registration by the sensor.
摘要:
A rear wheel steering device is provided in a vehicle with a simple structure in which rear wheels are supported at both end portions of a rear axle housing along a width direction of a chassis in order to drive the vehicle more stably at high speeds. The rear wheel steering device includes a leaf spring device connected to a chassis through a shackle link, a pair of upper and lower rubber pad members for sandwiching a rear axle housing and a tightening device for tightening the rear axle housing to be applied with a predetermined compressive load so that a durability of the rubber pad is improved without any frictional abrasion.
摘要:
In a steerable wheel axle for a motor vehicle with a rigid axle body which includes a hydrostatic or servo-assisted steering device that is incorporated in the axle body, the steering cylinder is arranged coaxially with the longitudinal median axis of the axle body and in driving connection with a swivelling lever radially projecting from axle body and linked to steering tie rods.
摘要:
A four-wheel steering system for a vehicle has a rear wheel steering ratio changing means which changes the rear wheel steering ratio in accordance with rear wheel steering ratio characteristics predetermined according to the vehicle speed, and an inhibiting means which inhibits the rear wheel steering ratio changing means from changing the rear wheel steering ratio when the steering wheel is turned right or left from its neutral position.
摘要:
An oleodynamic steering control device for vehicles having a straight traveling stabilizer, the device comprising a cylindrical member containing a reciprocatable or rotatable element connected to the main steering system and operative to generate a fluid pressure which is transmitted to a steering actuator on an axle to be steered. The device provides a fluid bypass to a reservoir for a certain range relative to the position corresponding to the straight traveling condition of the vehicle. This relieves the pressures generated by small deviations from straight traveling, which occur at relatively high speed, and thus they are not transmitted and multiplied on the steered axle which is thus stabilized, affording greater traveling safety.
摘要:
Steering control valves selectively pressurize and vent fluid-actuated clutches and brakes of a crawler tractor steering system. Each control valve has an internal spool assembly, coupled to a foot pedal by a cable, which modulates brake pressure as a function of a pedal position and which establishes a maximum brake fluid pressure thereby eliminating the need for additional system components for such purposes. The control valves also provide a feedback fluid pressure, to resist pedal depression with a force proportional to the brake fluid pressure, enabling an operator to sense the degree of braking which is present at different degrees of pedal depression.