19results about "Construction cranes" patented technology

This invention provides a hydropneumatic suspension hydraulic system and an engineering vehicle. The hydropneumatic suspension hydraulic system includes a left suspension cylinder group, a right suspension cylinder group, a first connecting oil circuit, a second connecting oil circuit, a rigidity / flexibility switching valve, and a combined suspension main valve. The first connecting oil circuit connects the rod-side chamber of the left suspension cylinder group and the rodless chamber of the right suspension cylinder group. The second connecting oil circuit connects the rodless chamber of the left suspension cylinder group and the rod-side chamber of the right suspension cylinder group. Both the first and second connecting oil circuits are equipped with rigidity / flexibility switching valves. The combined suspension main valve is connected to both the first and second connecting oil circuits. The combined suspension main valve and the rigidity / flexibility switching valve cooperate to control the movement or locking of the left and right suspension cylinder groups. This invention reduces the number of main valves required by integrating the left and right suspension main valves into a single combined suspension main valve, saving installation space, simplifying hydraulic lines and pipelines, and making manufacturing easier.

A fluid suspension system for a land vehicle is provided with a fluid biasing member with a first fluid port and a second fluid port. The fluid biasing member is adapted to be connected to a chassis and a first axle of a land vehicle spaced apart from a pivotal connection of the first axle to pivot the first axle relative to the chassis upon movement to a first position and a second position. A proportional valve is in fluid cooperation with the first fluid port of the fluid biasing member to permit fluid to flow to the fluid biasing member to bias the fluid biasing member to the first position, and to permit the fluid to flow from the fluid biasing member to the proportional valve, and to the second fluid port of the fluid biasing member to bias the fluid biasing member to the second position.

The invention relates to an electrically drivable steering axle (10) having an axle housing (11), an electric motor (12), a transmission (13), a differential (14) with a first output shaft (18) and a second output shaft (18′), a first wheel head (15), a second wheel head (16) and a steering linkage (17, 17′, 17″). The electric motor (12) is drive-connected to the first wheel head (15) and to the second wheel head (16) via the transmission (13) and the differential (14). The steering axle (10) according to the invention is distinguished by the fact that the electric motor (12), the transmission (13), and the differential (14) are arranged coaxially with the first output shaft (18) and the second output shaft (18′). The invention additionally relates to a corresponding vehicle.

The invention discloses a steering mechanism and an independent suspension system. The steering mechanism comprises a steering rocker arm unit, a mid-position locking cylinder, a first power steering cylinder, a second power steering cylinder, a first steering linkage and a second steering linkage; one end of the mid-position locking cylinder is connected with the steering rocker arm unit, and the other end is hinged to a frame; one ends of the first power steering cylinder and the second power steering cylinder are connected with the steering rocker arm unit, and the other ends are hinged to the frame; and one ends of the first steering linkage and the second steering linkage are connected with the steering rocker arm unit, the other ends are connected with knuckle arms, and the knuckle arm is fixed on a wheel rim.

To provide a crane which can travel by electric power.SOLUTION: The crane comprises: a slewing upper structure supporting a boom; and a running vehicle body which supports the slewing upper structure and runs on the basis of electric power of a power source portion. The running vehicle body has: high-voltage equipment which is the power source portion or a device connected to the power source portion; a cooling device which is arranged above the high-voltage equipment, has an air exhaust port with an opened upper portion and cools the power source portion; and a dewatering tray which is provided between the high-voltage equipment and the cooling device, wastes water ingressed into the cooling device from the air exhaust port.SELECTED DRAWING: Figure 6

A system and method of this disclosure control an on / off state of a power take-off by monitoring the power demand of a fluid power circuit that includes the power take-off and a piece of equipment connected to the power take-off. The power demand may be indicated by a pressure or temperature of a fluid power circuit, by a motion of the equipment or its hand-held controller, or by an engine torque of an engine driving the power take-off. When the equipment transitions between an off state and an on state, the controller automatically engages the power take-off. When the equipment is in the on-state for a predetermined amount of time and the power demand is at or below a predetermined threshold during the predetermined amount of time—thereby indicating idle time or an inactive state of the equipment—the controller automatically disengages the power take-off.

[Problem] A work machine control method, a work machine control program, a work machine control system, and a work machine that can improve the reliability of the movement of the work machine are provided. [Solution] The work machine control method includes actuating a first limiting unit 48, determining whether or not the first limiting unit 48 has an abnormality, and actuating a second limiting unit 49 based at least on a determination result of determining whether or not the first limiting unit 48 has an abnormality. The first limiting unit 48 limits a movement of a drive unit that drives a work machine 3. The second limiting unit 49 limits the movement of the drive unit separately from the first limiting unit 48.

The invention relates to the technical field of vehicle suspensions, in particular to a suspension valve group, a vehicle and a control method. The valve group body comprises the first reversing valve, the second reversing valve and the third reversing valve, the first reversing valve is used for controlling the on-off state of the rodless cavity and the rod cavity of the suspension oil cylinder, the differential function of the suspension oil cylinder can be achieved, the effective movement stroke of the suspension oil cylinder can be increased, and therefore the ground touching performance of a suspension is improved; the third reversing valve is used for controlling the on-off state of the second energy accumulator and a rodless cavity of the suspension oil cylinder, and self-adaptive adjustment of the rigidity of the suspension is achieved. By controlling the valve position states of the first reversing valve, the second reversing valve and the third reversing valve of the valve bank body, self-adaptive adjustment in different axle load states can be achieved so as to improve the driving smoothness.

The invention discloses a steering mechanism and an independent suspension system. The steering mechanism comprises a steering rocker arm unit, a mid-position locking cylinder, a first power steering cylinder, a second power steering cylinder, a first steering linkage and a second steering linkage; one end of the mid-position locking cylinder is connected with the steering rocker arm unit, and the other end is hinged to a frame; one ends of the first power steering cylinder and the second power steering cylinder are connected with the steering rocker arm unit, and the other ends are hinged to the frame; and one ends of the first steering linkage and the second steering linkage are connected with the steering rocker arm unit, the other ends are connected with knuckle arms, and the knuckle arm is fixed on a wheel rim. The invention eliminates a rocker arm sleeve and rocker arm supports, which significantly reduces the overall weight, reduces the required space for the steering mechanism, allows for a more compact arrangement of components, simplifies the manufacturing process, and reduces economic costs.

A method of on-demand energy delivery to an active suspension system comprising an actuator body, hydraulic pump, electric motor, plurality of sensors, energy storage facility, and controller is provided. The method comprises disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

The invention relates to the technical field of vehicle suspensions, in particular to a suspension valve group, a vehicle suspension system and a control method. The first reversing valve is arranged between the rod cavity of the suspension oil cylinder and the oil tank, switching-on and switching-off between the rod cavity and the hydraulic oil tank can be achieved through reversing of the first reversing valve, when the rod cavity communicates with the oil tank, the rod cavity relieves pressure, and therefore under the same load bearing state (a rodless cavity of the suspension oil cylinder communicates with the first energy accumulator), the hydraulic oil tank can be opened or closed. The cylinder diameter of the oil cylinder of the suspension can be designed to be smaller, and the interactive flow between the oil cylinder and the energy accumulator is reduced, so that the purpose of damping reduction is achieved. When the vehicle is supported and after the vehicle is supported, and the first reversing valve is switched to a stop position, the rod cavity of the suspension oil cylinder is disconnected from the oil tank and can be closed, the suspension oil cylinder cannot be lengthened when the vehicle is supported and after the vehicle is supported, tires can be separated from the ground, and the tires are separated from the ground, so that safe operation of the vehicle is facilitated.

A crane includes: an upper slewing body that supports a boom; and a travel vehicle body that supports the upper slewing body and travels based on electric power of a power supply unit, wherein the travel vehicle body includes: a high-voltage equipment that is the power supply unit or a device connected to the power supply unit, a cooling device that is arranged above the high-voltage equipment, has an exhaust port which is open at a top, and cools the power supply unit, and a drainage tray that is provided between the high-voltage equipment and the cooling device and drains water which has entered the cooling device from the exhaust port.

Aspects of the present disclosure relate to a locking control method for a pivot axle of a wheeled working machine including: determining, using a multibody simulation model, a current posture and motion state of the working machine and static and dynamic forces acting on the working machine; determining a relevant tipping line based on a current locking status of a pivot axle of the working machine; calculating torques acting on the working machine based on the information on current posture, motion state, static and dynamic forces; determining a control command for a pivot axle locking mechanism of the working machine based on the calculated torques and the tipping line; and providing the control command to a pivot axle locking mechanism.

The invention discloses a crane hydro-pneumatic suspension control method, system, device and equipment, and belongs to the technical field of engineering vehicle control, and the method comprises the following steps: executing hydro-pneumatic suspension lifting control and variable damping adjustment control by an arithmetic unit; the hydro-pneumatic suspension lifting control comprises the step of receiving hydro-pneumatic suspension lifting instructions, wherein the hydro-pneumatic suspension lifting instructions comprise a hydro-pneumatic suspension lifting instruction and a hydro-pneumatic suspension descending instruction. The following steps are repeatedly executed until the hydro-pneumatic suspension reaches the target position: based on the hydro-pneumatic suspension ascending instruction, the hydraulic system is controlled to execute throttling increasing / oil supply reducing control when the hydro-pneumatic suspension ascends; and based on the hydro-pneumatic suspension descending instruction, when the hydro-pneumatic suspension descends, the hydraulic system is controlled to execute throttling reduction / oil supply increase control and keep back pressure. The problems that in the prior art, the crane suspension is low in leveling efficiency and poor in precision, and the stability is poor due to the fact that adaptability to different loads and vehicle speed working conditions in the running process is insufficient are solved. The service life of the structure is influenced by non-uniform shaft load distribution of each supporting point; and the operation flexibility is limited.

The invention relates to a handling machine (1) comprising:a rotating chassis;a lifting arm (7);a first assembly comprising a device for storing electrical energy (9);a second assembly comprising a fuel cell (10) which is connected to the device for storing electrical energy (9) via a connecting circuit (35); anda third assembly comprising at least one tank (11);wherein one of the first, the second and the third assemblies is fixed to one of the lower and upper structures (2, 3) and the two others of the first, second and third assemblies are fixed to the other of the lower and upper structures (2, 3);

A fluid suspension system for a land vehicle is provided with a fluid biasing member with a first fluid port and a second fluid port. The fluid biasing member is adapted to be connected to a chassis and a first axle of a land vehicle spaced apart from a pivotal connection of the first axle to pivot the first axle relative to the chassis upon movement to a first position and a second position. A proportional valve is in fluid cooperation with the first fluid port of the fluid biasing member to permit fluid to flow to the fluid biasing member to bias the fluid biasing member to the first position, and to permit the fluid to flow from the fluid biasing member to the proportional valve, and to the second fluid port of the fluid biasing member to bias the fluid biasing member to the second position.

The invention relates to a locking control method for a pivot axle of a wheeled working machine comprising the steps: determining a current posture and motion state of the working machine and static and dynamic forces acting on the working machine, preferably using a multibody simulation model; determining a relevant tipping line based on a current locking status of a pivot axle of the working machine; calculating torques acting on the working machine based on the information on current posture, motion state, static and dynamic forces; determining a control command for a pivot axle locking mechanism of the working machine based on the calculated torques and the tipping line and providing the control command to a pivot axle locking mechanism.

A leveling system for a lift device includes an axle, a pin, a cradle, and a chassis. The axle is configured to rotatably couple with one or more tractive elements. The pin extends through a bore of the axle. The cradle is pivotally coupled with the pin. The chassis is pivotally coupled with the pin and includes a first actuator and a second actuator. The first actuator and the second actuator each include a body and a rod configured to extend relative to the body. The rods of the first actuator and the second actuator are configured to be extended to engage corresponding surfaces on opposite sides of the cradle. The cradle and the chassis are configured to rock in unison a limited angular amount relative to the axle.

The invention provides a chassis bracket and engineering machinery, the top of a vehicle frame is provided with a frame top surface, the bottom of the vehicle frame is provided with a frame bottom surface, and the transverse size of the frame top surface along the vehicle width direction is greater than the transverse size of the frame bottom surface along the vehicle width direction, so that an avoiding space for avoiding a shock absorber is formed between the frame top surface and the frame bottom surface; a fixing point is arranged between the frame top face and the frame bottom face and used for being connected with a shock absorber. The two ends, in the vehicle length direction, of the vehicle frame are the vehicle head end and the vehicle tail end respectively, the vehicle head end is connected with the rotation center, and the vehicle tail end is far away from the rotation center. According to the frame, the section design of the special-shaped box with the large upper portion and the small lower portion is adopted, meanwhile, the fixing point is arranged on the lower side portion of the frame, the side space of the frame is fully utilized, the height of the whole vehicle can be reduced, and meanwhile it can be guaranteed that the stress point structure of the shock absorber is reasonable.