The invention relates to a disk brake system for hoisting machines and winches, equipped with at least two brake circuits, wherein to each brake circuit at least one brake caliper with associated brake pads is allocated, and wherein two redundant, active control circuits (10, 12, 14, 16) are provided per brake circuit.

A braking system may include a brake assembly having a brake shaft and a brake lever coupled to the brake shaft. The system may also include a brake cylinder having a first chamber, a second chamber, a piston positioned between the chambers and a piston rod extending outwardly from the piston. The piston rod may be configured to be coupled to the brake shaft such that movement of the piston rod results in rotation of the brake shaft. In addition, the system may include a first valve configured to control a supply of working fluid to the first chamber and a second valve configured to control a supply of the working fluid to the second chamber. By adjusting a position of the first valve and/or the second valve, a braking force applied between the brake assembly and a drum of the draw works may be controlled.

A braking system may include a brake assembly having a brake shaft and a brake lever coupled to the brake shaft. The system may also include a brake cylinder having a first chamber, a second chamber, a piston positioned between the chambers and a piston rod extending outwardly from the piston. The piston rod may be configured to be coupled to the brake shaft such that movement of the piston rod results in rotation of the brake shaft. In addition, the system may include a first valve configured to control a supply of working fluid to the first chamber and a second valve configured to control a supply of the working fluid to the second chamber. By adjusting a position of the first valve and/or the second valve, a braking force applied between the brake assembly and a drum of the draw works may be controlled.

A brake device for an elevator hoisting machine includes: a rod movable in an axial direction; a plurality of pistons provided to the rod so as to be arranged side by side in the axial direction; a cylinder configured to accommodate each of the pistons therein and including a pressure control chamber formed between the cylinder and each of the pistons; a lining provided to the rod so as to be capable of coming into contact with a contacted body; and a spring device configured to press the pistons in a direction in which the lining is pressed against the contacted body. Gaps are respectively formed between at least one of the plurality of pistons and the rod and between pistons adjacent to each other. Each of the pistons is configured to be driven by a change in air pressure in the pressure control chamber.

A fluidically actuatable disk brake system includes brake cylinder pairs each including brake cylinders arranged on both sides of a brake disk in at least one brake caliper. Each brake cylinder includes a brake piston and a spring arrangement which applies a spring force toward the brake disk. First and second fluid connections are provided on the brake cylinder. The first and second fluid connections supply a fluid to the brake cylinder so that a force counteracting the spring force is applied to the brake piston. A 2/2-way valve is assigned either to the first or second fluid connection of first brake cylinders of a brake cylinder pair. The first or second fluid connection which is not assigned to the 2/2-way valve is fluidically connected to the respective other first or second fluid connection of a second brake cylinder of the brake cylinder pair.

A hydraulic lowering device for a safety brake of lifting equipment includes a fluid reservoir (1), a fluid outlet port (18), a pressurized fluid accumulator (2), a pump (3, 3) connected to the fluid reservoir for injecting pressurized fluid from the fluid reservoir into the pressurized fluid accumulator, and a three-way pressure regulator (4) including a mechanical control input, actuated via a handwheel (5), for setting a setpoint value, a fluid inlet connected to the pressurized fluid accumulator (2), a fluid outlet connected to the fluid outlet port (18), and a drain connected to the fluid reservoir (1). The three-way pressure regulator (4) enables precise and completely safe control of the release, reinforcement and attenuation of braking. The dissociation between establishing, by pumping, a reserve of energy into the pressurized fluid accumulator (2) and controlling the lowering via the three-way pressure regulator (4) facilitates control.

A hydraulic lowering device for a safety brake of lifting equipment includes a fluid reservoir (1), a fluid outlet port (18), a pressurized fluid accumulator (2), a pump (3, 3) connected to the fluid reservoir for injecting pressurized fluid from the fluid reservoir into the pressurized fluid accumulator, and a three-way pressure regulator (4) including a mechanical control input, actuated via a handwheel (5), for setting a setpoint value, a fluid inlet connected to the pressurized fluid accumulator (2), a fluid outlet connected to the fluid outlet port (18), and a drain connected to the fluid reservoir (1). The three-way pressure regulator (4) enables precise and completely safe control of the release, reinforcement and attenuation of braking. The dissociation between establishing, by pumping, a reserve of energy into the pressurized fluid accumulator (2) and controlling the lowering via the three-way pressure regulator (4) facilitates control.

A braking system (3), in particular emergency braking system, in a drive unit, which drive unit includes at least one motor (8) and at least one unit (6) driven by the motor (8). The braking system has: a plurality of controllable brakes (16a-16b), which are arranged and designed to act on the drive unit; and a controller (12), which is designed to preselect and accordingly pilot-control a number of brakes (16a-16b) from amongst said plurality of brakes (16a-16b) depending on a state or load situation of the drive unit, so that, when the braking system (3) is activated, the drive unit can be acted on only by way of said preselected number of brakes (16a-16b).

A braking system (3), in particular emergency braking system, in a drive unit, which drive unit includes at least one motor (8) and at least one unit (6) driven by the motor (8). The braking system has: a plurality of controllable brakes (16a-16b), which are arranged and designed to act on the drive unit; and a controller (12), which is designed to preselect and accordingly pilot-control a number of brakes (16a-16b) from amongst said plurality of brakes (16a-16b) depending on a state or load situation of the drive unit, so that, when the braking system (3) is activated, the drive unit can be acted on only by way of said preselected number of brakes (16a-16b).

A winch brake device that is used for a work machine and generates a braking force on the basis of a brake manipulation, includes a pressing member that brings braking members into pressure contact with each other to generate the braking force, a first brake cylinder that applies a first pressing force for bringing the braking members into pressure contact with each other to the pressing member, and a second brake cylinder that applies a second pressing force different from the first pressing force to the pressing member. The first brake cylinder and the second brake cylinder are capable of applying the first pressing force or the second pressing force independently of each other.