Abstract:
A brake system (11) for a machine (10), where an operator brake valve (32) is controllable by an operator input device (25) and an automatic brake valve (33) is controllable by a control system (20). A control valve (34) is connected to a brake (15) and the operator and automatic brake valves (32) and operated by the control system (20) between an operator brake configuration (63) fluidly connecting the operator brake valve (32) to the brake (15) and an automatic brake configuration (64) fluidly connecting the automatic brake valve (33) to the brake (15). In an operator braking mode (81), the control valve (34) provides that the brake (15) is controllable in response to an input to the operator input device (25). In an automatic braking mode (82) the control valve (34) provides that the brake (15) is controllable in response to a control signal from the control system (20).
Abstract:
The present invention relates to an operating mechanism (1) for operating a of at least one parking brake of a motor vehicle via braking cables (110, 120). The operating mechanism (1) comprises a first driving unit (10, 30, 90) for driving a first actuating element (40) and a second driving unit (60, 80, 100) for driving a second actuating element (50), wherein the second actuating element (50) engages the first actuating element (40). Due to the relative movement of the first actuating element (40) with respect to the second actuating element (50), at least one braking cable (110, 120) is tightened or released for actuating of the at least one parking brake. Further, the invention comprises a method for actuating of parking brakes with the operating mechanism (1), wherein for tightening or releasing of the at least one braking cable (110, 120) the driving units (10, 30, 90, 60, 80, 100) are driven with the same as well as with opposing rotational direction.
Abstract:
A rotary electromechanical actuator rotationally drives a spool member (20) for operating a flexible transmission means in a motor vehicle. The actuator comprises two speed-reduction stages connected in series. The first speed-reduction stage is a worm gear system with a worm (11) rotated by an electric motor (12) and a helical gear (13). The second speed-reduction stage is a planetary gear system with a central gear (14) rigidly connected to the helical gear (13), an internally toothed ring gear (15) fixed to a stationary casing (16), a series of planet gears (17) rotating on pins (18) attached to a planet carrier (19) rigidly connected to the spool member (20). The teeth of the helical gear (13) are coaxial and lie around and axially approximately level with the planetary gear system.