21results about "Hydrostatic brakes" patented technology

This invention discloses a hydraulic retarder for reducing no-load losses, comprising: a stator, a rotor, and hydraulic fluid disposed inside a housing; a rotor shaft fixedly connected to the rotor; a high-gear and a low-gear on the rotor shaft, both loosely fitted on the rotor shaft; a low-gear and a high-gear on the output shaft fixedly fitted on the gearbox output shaft, respectively meshing with the low-gear and high-gear on the rotor shaft; a sliding sleeve axially movable, fitted on the rotor shaft, selectively meshing with either the high-gear or low-gear on the rotor shaft; a shift fork connected to the sliding sleeve for driving its movement; a cylinder including a first piston and a second piston, forming multiple working cylinders; an air source selectively connected to the multiple working cylinders; and the piston rod of the first piston selectively contacting the second piston, the piston rod of the second piston being connected to the shift fork. This invention features reduced no-load losses and increased braking power.

A power machine (200) can include a traction lock system to stop movement of the power machine. The traction lock system can include a controller (310) configured to receive a brake input from an operator. In response to receiving the brake input, the controller (310) can temporarily command a target (e.g., reduced) speed of the engine (220) before engaging the brake (300).

Carriage (1) with a brake module (6) for a gravity overhead conveyor, characterized in that the brake module (14) comprises several fluid cylinders (15), one end of which is connected to a carriage (1) and the other end of which is eccentrically connected to an axis (4, 5) of the carriage (1), wherein the fluid cylinders (15) are indirectly eccentrically connected to the axis (4) at different mounting points (16, 17) and the mounting points (16, 17) are arranged on different running wheels (3) assigned to an axis (4, 5).

The application provides a pump type hydraulic resistance retarder, which mainly solves the technical problems of the existing retarder, such as large weight and volume, small continuous power, starting lag and poor braking effect at low speed. The retarder comprises a pump and a pressure regulating device, the pump comprises a pump shell, a main rotor and N auxiliary rotors located at the outer periphery of the main rotor; the pump shell is provided with N liquid inlet channels; the main rotor is provided with N blades, the N blades divide the cavity between the main rotor, the auxiliary rotors and the pump shell into N pump cavities, an inner cavity with a single-end outlet is axially arranged in the main rotor, and a first liquid outlet hole is arranged between the inner cavity and the N pump cavities; the inner cavity is connected with the pressure regulating device; the pressure regulating device is provided with a liquid outlet channel; and the liquid inlet channel, the pump cavity, the first liquid outlet hole, the inner cavity and the liquid outlet channel form a liquid channel. The pressure regulating device can be embedded or connected externally, so that the application range is wider.

The invention relates to a brake system (100) for braking a rotation shaft (1), characterised in that it comprises: - at least one piston (4), actuated by means of an electric linear actuator (3), able to move between a retracted release position and a final extended braking position; - a casing (6) adapted to rotate integrally with the rotation shaft, with a cavity closed by a perpendicular cover (5), provided with at least one opening in which the piston (4) is fitted, and the piston (4) having the ability to move forwards into the closed cavity and move backwards, and - a filling occupying the closed cavity, rotating with the casing, consisting of a dispersion (7) or amalgam formed by a powdery or granular product with a lubricating agent.

A method of automatically activating a high-torque braking system in a heavy-duty vehicle configured to operate in at least one low speed, high torque mode and at least one higher speed, lower torque mode is disclosed. The method comprising determining a speed-controller of the vehicle is in a first position which results in the vehicle travelling in a higher-speed, lower-torque mode, and, responsive to detecting braking and a change in position of the speed-controller from the first position to a second, neutral, position, activating a low-speed high torque mode of operation for braking the vehicle.

The invention relates to a hydrostatic vehicle intelligent trailer system and a control method, the hydrostatic vehicle intelligent trailer system comprises at least two groups of closed high-pressure loops, and each group of closed high-pressure loops comprises a walking pump, a walking motor and a hydraulic control reversing valve; the hydraulic control reversing valves of the two closed high-pressure loops are connected through a pipeline, a stop valve and a trailer valve are arranged on the pipeline, the other end of the stop valve is connected with a brake clutch through a pipeline, the brake clutch is connected with an oil supplementing mechanism through a pipeline, and a manual pump, an automatic pump and a trailer reversing valve are integrated in the trailer valve. According to the trailer environment and the trailer distance, a manual mode or an automatic mode can be autonomously adopted to relieve the braking resistance of the hydrostatic walking system, in the trailer process, the system has a braking low-pressure early warning function, the rotating speed of a motor can be automatically adjusted, internal leakage of a control valve and a clutch can be compensated according to the braking pressure requirement, and smooth trailer operation is guaranteed; the brake is prevented from being damaged.

A method for changing the direction of travel of a truck-mounted forklift by an operator located in the truck-mounted forklift, comprising the following method steps: - forwarding a command from the operator to change the direction of travel to a control unit (2), - in the event that the instantaneous speed of the truck-mounted forklift exceeds a predetermined value, reducing the speed below a predetermined limit by the control unit (2) according to a predetermined relationship and subsequently changing the direction of travel by the control unit (2), and preferably accelerating to a predetermined speed according to a predetermined relationship, and - in the event that the instantaneous speed of the truck-mounted forklift does not exceed a predetermined value, immediately changing the direction of travel by the control unit (2), and preferably accelerating to a predetermined speed according to a predetermined relationship.

At least some embodiments of the present disclosure relate to a distributed pump architecture for use in a control system for a multi-function machine. In some cases, the control system for the multi-function machine includes three or more control circuits. At least two of the control circuits each include a hydraulic fluid pump, each pump being controlled by a different control circuit. At least two of the hydraulic fluid pumps have different flow rates.

A power machine (200) can include a traction lock system to stop movement of the power machine. The traction lock system can include a controller (310) configured to receive a brake input from an operator. In response to receiving the brake input, the controller (310) can temporarily command a target (e.g., reduced) speed of an engine (220) before engaging the brake (300).

The invention relates to a method for controlling a motor brake of an internal combustion engine of a powertrain of a motor vehicle (10). In one step, the motor brake (40) is activated. In another step, a reversing process (42) is detected. A step is then carried out in which a deactivation time of the motor brake is determined on the basis of the detected reversing process (44), and in another step, the motor brake is deactivated at the deactivation time (46). The invention additionally relates to a controller (12).

A drive unit having an electrohydraulic drive (10) and a hydraulic auxiliary system (12), the auxiliary system generating an auxiliary torque that opposes the main torque of the electrohydraulic drive (10) when necessary.

A hydraulic / mechanical braking system for a vehicle comprises a cam (128) keyed onto a transmission shaft or a trailing wheel and at least two hydraulic cylinder assemblies (126,129) including a cam follower (127). A hydraulic circuit (C) connects the hydraulic cylinder assemblies together. A master brake valve (113) controls the flow of fluid in the circuit. Actuation of the master brake valve (113) obstructs the flow of fluid and hence the reciprocation of the hydraulic cylinder assemblies, forcing the cam following against the cam to resist rotation. The system further comprises an energy recovery system configured to transfer energy from the hydraulic fluid flowing in the hydraulic circuit to generate electricity and / or to recover heat from the hydraulic fluid flowing in the hydraulic circuit.

A hydraulic fluid system is disclosed herein. The hydraulic fluid system includes a hydraulic motor (30) including an output shaft (42), a reduction gear box (45) having a first side and an opposing second side, the reduction gear box being coupled to the output shaft at the first side and coupled to a reduction shaft (43) at the second side, and a magneto-rheological fluid brake (MRF) brake (50) coupled to the reduction shaft.

A hydraulic / mechanical braking system for a vehicle comprises a cam (128) keyed onto a transmission shaft or a trailing wheel and at least two hydraulic cylinder assemblies (126, 129) including a cam follower (127). A hydraulic circuit (C) connects the hydraulic cylinder assemblies together. A master brake valve (113) controls the flow of fluid in the circuit. Actuation of the master brake valve (113) obstructs the flow of fluid and hence the reciprocation of the hydraulic cylinder assemblies, forcing the cam following against the cam to resist rotation. The cam (128) is formed with two opposing flat faces (142, 143) in order to provide an anti-lock braking system (ABS).

Disclosed is an Integrated Wheel Hub and Multispeed Hydraulic Motor / Pump and Braking Unit, Control Valving System and Drive Clutches for vehicles using an Electro-hydraulic propulsion system, commanded and controlled by the Vehicle Control System.

Provided is a hydrostatic radial piston unit of the cam-lobe type of construction comprising a non-rotary, stationary housing at least partially enclosing an interior cavity. A rotary cylinder block with radially oriented cylinder bores is arranged in the interior cavity and is rotatable around a rotational axis of the hydrostatic radial piston unit. The hydrostatic unit further includes a park brake device comprising at least one non-rotary brake disc which is in torque-proof connection with a non-rotary element of the hydrostatic radial piston unit and at least one rotary brake disc which is in torque-proof connection with a rotary element of the hydrostatic radial piston unit. The park brake device is at least partially radially enclosed by the cylinder block.