An operator lever device for a tracked vehicle equipped with a steering valve for controlling steering operations, a first transmission valve for selecting forward/backward traveling operation and a second transmission valve for controlling speed changing operations, has a rotary yoke shaft which is disposed horizontally in the front-and-rear directions with respect to an operator, a yoke mounted on an end of the rotary yoke shaft so as to be pivotable in the left-and-right directions, a cruciform member which is mounted to the yoke by pivot pins so as to be pivotable in the front-and-rear direction, and a single operator lever which is mounted upright in the cruciform member so as to be rotatable about the longitudinal axis of the operator lever. The operator can easily steer, select forward/backward operation, and change the speed stage of the vehicle by using only the single operator lever.
Setting-element arrangement controls the longitudinal speed and/or the steering angle of a motor vehicle. More specifically, a user-actuable setting element which, during forward motion, when actuated in a respectively first actuation direction, brings about a change of the parameter controlled thereby in a first change direction and, when actuated out of the position of rest into a respectively second actuation direction which is opposite the first, brings about a change of this parameter in a second change direction opposite to the first. In such a setting-element arrangement, the assignment of the two change directions of the longitudinal speed and/or of the steering angle to the respectively first or second actuation direction of the setting element is inverted, during reverse motion, in relation to that during forward motion. The driver's intuitive association of a setting-element actuation corresponding to the desired dynamic vehicle reaction is thus maintained, even during reverse motion.
A hydraulic shovel is provided which comprises a pair of left and right running/rotation pedals (3L and 3R) for running or rotating a vehicle, and a single running/rotation lever 7 which is installed separately from the pedals for similarly running or rotating the vehicle. The shovel allows the operator to run or rotate the vehicle by operating on the running/rotation pedals 3L and 3R, as well as by manipulating the running/rotation lever 7. Moreover, because the running/rotation lever 7 consists of a single lever, the operator can easily manipulate it by one hand, being relieved of complicated operations and inconveniencies encountered with the conventional machine, which ensures the improved operability.
An operating device for a motor vehicle transmission is described which has a shift lever which, for shifting between transmission ratios, is movably mounted on the motor vehicle. In particular, the shift lever can be shifted in a respective shifting channel about a shifting axis essentially in the longitudinal direction of the vehicle and, for selecting between different shifting channels, can be swivelled in at least one selection channel about a selection axis essentially in the transverse direction of the vehicle. A motion gearing connects the shift lever with at least one transmission control shaft of a motor vehicle transmission, in which case a motor vehicle transmission case is linked to the motion gearing. The shift lever is mounted on a vehicle-body-fixed vehicle part and, in a projection onto a shifting plane, the motion gearing consists of at least one parallelogram linkage. During a shifting and/or selecting movement of the shift lever, three rods of the linkage are changed in their position and one rod maintains its position which, on its one end is swivellably mounted in the shifting plane on a vehicle part fixed to the vehicle body and, on its other end, is movably connected with the motor vehicle transmission case by way of at least so many degrees of freedom that any spatial movement of the motor vehicle transmission is possible without causing reaction forces in the motion gearing.
A control element arrangement is disclosed for controlling a motor vehicle without conventional pedals and steering wheel. Two control elements are provided which can be operated independently of one another, in which case at least the longitudinal speed and/or at least the steering angle can be controlled optionally by operating one or the other control element. As a result, with respect to the longitudinal and/or the lateral dynamic control, on the one hand, a redundancy is created which increases the operating reliability and, on the other hand, the control-comfort-increasing possibility is created of being able to guide the vehicle alternated by means of one or the other control element.
A vehicle comprises a vehicle frame, a prime mover mounted on the vehicle frame, a laterally turnable wheel disposed at one side of the vehicle frame, a pair of drive wheels disposed at the other side of the vehicle frame, a steering operation device, a traveling operation device for setting the traveling speed and direction of the vehicle, and a pair of transmissions for controlling the rotary speed and direction of the respective drive wheels. The transmissions are operationally connected with the steering operation device so as to create a difference of rotary speed between the drive wheels according to operation of the steering operation device. The transmissions are operationally connected with the traveling operation device so as to drive the drive wheels in a common rotary direction from their stationary state according to operation of the traveling operation device. A clutch is interposed between the transmissions so as to connect the drive wheels with each other when the steering operation device is set in a straight traveling position. Based on setting of a switching device for switching the traveling direction of the vehicle between forward and rearward, a reverser decides the rotational direction of the drive wheels.
