COMMAND INPUT DEVICE FOR EXCAVATOR CONTROL SYSTEM Russian patent published in 2023 - IPC G05G9/47 H01H9/50 B61C17/12 

FIELD: control systems.

SUBSTANCE: controls for operation of an excavator, where reliability and validity of generation of the control commands from the operator is required. Additional technical results are the elimination of the influence of abrasive dust on abrasion and wear of mechanisms due to installation of protective corrugation. The command input device for the excavator control system contains a drive with self-return mechanisms in two planes with torsion springs, a mechanism for fixing the handle in the neutral position, consisting of a spring-loaded ball in contact with a spherical surface having a ball catcher in the centre, three angle sensor channels per each of the 2 coordinates of handle movement, where each channel consists of a microcircuit using Hall sensors and a magnet. The microcircuits are mounted on angle sensor boards, combined into two three-channel angle sensor blocks. All six channels of angle sensors are combined by one controller board, which includes three controller channels common to all angle sensors with their own power supplies. The device contains a housing consisting of four walls with installed bearings; an axis is installed in the bearings of two opposite walls, at one end of which a magnet and a rocker with a magnet are fixed. In this case, a pin is inserted in the centre of the axis, to which is attached a fork with a rod on which the handle is attached, and the other end of the axis is used to fasten the clamp, which holds a pin for engaging the whiskers of a torsion spring mounted on the same axis. In addition, the other two walls serve for fastening two axle shafts, on one of which a torsion spring and a clamp with a pin for engaging the spring moustache are mounted, the other axle shaft holds the clamp, and also a magnet and a rocker with a magnet are attached to its end. At the ends of two clamps located on two axle shafts, a guide is fixed, the groove of which limits the angle of inclination of the handle.

EFFECT: non-contact measurement of the angle of rotation of the handle in all directions within 360° with a self-return function from any position to a neutral position, provided by a two-coordinate mechanism for moving the handle with angle measurement along each of the two coordinates of movement with three-channel redundancy of angle sensors for each coordinate.

4 cl, 1 dwg