112results about "Forklift trucks" patented technology

A supplemental control system for a materials handling vehicle comprises one or more sensors capable of defining multiple contactless detection zones at least towards the front of the forward travel direction of a remotely controlled vehicle. The vehicle responds to the detection of objects within the designated zones based upon predetermined actions, such as to slow down or stop the vehicle, and/or to take other action, such as to perform a steer angle correction.

A skid steer vehicle has a suspension that includes a control arm pivotally coupled to the vehicle chassis that is supported by a hydraulic cylinder connected to an accumulator to provide springing. A hydraulic circuit coupled to the cylinder and accumulator permit the operator to raise and lower the chassis, to lock the suspension while the vehicle is loaded, and to automatically charge or discharge the accumulator to match the cylinder pressure during loading and unloading. In this manner, when the suspension is unlocked after loading, the vehicle chassis neither rises nor falls.

A suspension system for an agricultural or construction industry vehicle is described. The suspension system comprises two hydraulic cylinders, which support a frame in relation to an axle of the vehicle, the hydraulic cylinders each having a piston-side chamber and a piston rod-side chamber and each of the chambers of the hydraulic cylinders being connectable to one another via connecting lines provided with a switch valve, a first supply line, which can be connected via a switch valve to the piston-side connecting line of the first hydraulic cylinder, a second supply line, which can be connected via a switch valve to the piston-side connecting line of the second hydraulic cylinder, a hydraulic accumulator, in each case connectable to the supply lines via proportionally adjustable orifices, a hydraulic source, a hydraulic tank, a control valve device, and an electronic control unit. In order to prevent the activation of a suspension state in critical vehicle states, means for the detection and compensation of load states of the vehicle are provided in the suspension system.

A hybrid wheel loader is provided, the hybrid wheel loader achieving high work efficiency even with a short supply of power to be output relative to a vehicle power requirement.

The hybrid wheel loader includes a motor generator 6 connected to an engine (1), a hydraulic pump (4) connected to the motor generator, a hydraulic actuator (51, 52, 53) driven by hydraulic oil supplied from the hydraulic pump, a travel electric motor (9) for driving wheels (61), and an electrical storage device (11) connected to each of the motor generator and the electrical storage device via respective inverters (7, 10). When a total requirement power value is greater than a hybrid output upper limit value, either one of a hydraulic requirement power value Pf and a travel requirement power value Prun is limited according to an operation of the wheel loader to thereby set the total requirement power value to a value equal to, or less than, the hybrid output upper limit value.

The present invention provides a running control device for an industrial vehicle that has superior driving operability and that allows easy starting and stopping on road surfaces that have sloped or stepped surface. The running control device for an industrial vehicle includes an engine, a sensor that detects an operation amount of an accelerator member, a transmission that has a forward clutch and reverse clutch, a brake that applies braking to the vehicle, and a controller. The controller simultaneously controls the engine revolutions, the engaging force of the forward clutch and reverse clutch and the braking force of the brake in accordance with the operation amount.

A two-way clutch is provided between an engine and a generator motor. Further, a battery and a cargo handling pump are provided. The generator motor is set to either a generator mode or an electric motor mode. When a cargo handling load (detected by a sensor) is small, the two-way clutch is set to a first state in which transmission of driving force from the engine to the generator motor is allowed and in which transmission of driving force in reverse is prevented. Further, when the engine is stopped or idled, the cargo handling pump is driven by the generator motor in the electric motor mode. When, during the above operation, the load increases to a level above a predetermined value, an increase in output of the generator motor and an increase in engine RPM are started, and when the engine RPM becomes equal to the RPM of the generator motor, which previously increased, the two-way clutch in the first state is connected, and the cargo handling pump is driven by the engine.

A fork lift truck for moving a load, comprising a load bearing member (3) for carrying the load, wherein the truck comprises means (4, 5, 15, 19) for adjusting the vertical axis of the load bearing member to maintain it substantially parallel to the axis of gravitational pull on the load, when the truck travels along a surface having varying degrees of flatness or deviance from horizontal.

An axle supporting structure for supporting an axle beam for an industrial vehicle includes a center pin, a pair of axle supporting units and a counterweight. The center pin protrudes from the axle beam. Each axle supporting unit has formed therethrough an insertion hole in which the center pin is inserted. The axle supporting unit has an upper axle supporting member and a lower axle supporting member which is detachably connected to the upper axle supporting member. The pair of axle supporting units is spaced from each other in a traveling direction of the vehicle. The center pin is rotatably supported between the pair of axle supporting units. The upper axle supporting members of the axle supporting units are cast in the counterweight.

A lift truck includes systems and methods for improved stability control. Stability control features reduce or eliminate motion of the truck in one or more of the X-axis, Y-axis, and Z-axis. Some embodiments may include, alone or in combination with the stability control, vibration control to further stabilize the motion of the truck.

The present invention refers to an industrial truck comprising a suspension unit (12', 50) for a driving and steering wheel (4, 56). the industrial truck further has at least two side wheels (5). The truck further comprises restraining means (20) in engageable connection with the driving and steering wheel (4, 56), such that the restraining means (20) are capable of decreasing or stopping the vertical movement (V) of the driving and steering wheel (4, 56).

A material handling vehicle control systems and methods comprise a plurality of sensors, the plurality of sensors coupled to a material handling vehicle; a data collection system; a processor, the processor executing a real time weight calculation program, the weight calculation program comprising the steps of receiving data from the plurality of sensors; and combining the data from the plurality of sensors to continuously determine a real time weight value of a load of the material handling vehicle; the processor controlling a speed of the material handling vehicle based on at least the real time weight value.

A lift truck includes systems and methods for improved vibration control. Vibration control features reduce or eliminate motion of the truck in one or more of the X-axis, Y-axis, and Z-axis. Some embodiments may include, alone or in combination with the vibration control, stability control to further stabilize the motion of the truck.

The invention discloses a counterbalanced forklift truck with an automatic counterweight balancing function. The counterbalanced forklift truck comprises a hydraulic self-driven counterweight balancing system, a wing type balancing semi-independent damping device, a lateral fine adjustment automatic balancing system and a forklift truck main body chassis frame system. The invention belongs to the technical field of carrying forklifts, and particularly relates to the counterbalanced forklift truck with the automatic counterweight balancing function and the using method thereof; and through the hydraulic self-driven counterweight balancing system and the lateral fine adjustment automatic balancing system, when goods are lifted or put down, the gravity center of a forklift truck is subjected to self-adaptive correction, the possibility that the forklift truck inclines forwards, backwards and laterally due to the fact that the offset of the gravity center is too large is greatly reduced, through the wing type balancing semi-independent damping device, the comfort and obstacle crossing ability of a forklift truck chassis are both considered, in-situ turning can be completed under the condition that an external structure is not added, the position of a weight box is locked through an electromagnetic weight box locking device after the gravity center is balanced, and the weight box is prevented from sliding over the limiting position through a thermal locking device at the end.

Embodiments of the present invention may include an axle support structure. The axle support structure has front and rear axle supports, an axle, and a bearing. The axle supports are provided on a vehicle body member of an industrial vehicle and have respectively a support hole. The axle is arranged between the front and rear axle supports, and has a pair of center pins. Each of the center pins is rotatably supported by the support hole. The bearing is inserted from an entrance of the support hole to be fit-engaged with the support hole. The bearing is provided between at least one of the center pins and a hole surface of the support hole corresponding to that center pin. At an end portion of the support hole opposite to the entrance, there is formed a stopper portion for preventing the bearing from passing through the support hole.

Provided is a work vehicle equipped with: an electrical storage device (11); inverter devices (7, 10); a converter device (12) for converting the voltage of the circuit to which the inverter devices (7, 10) are connected; a generator motor (6) for driving a hydraulic pump (4) with alternating current from the inverter device (7); a motor (9) for driving wheels (61) with alternating current from the inverter device (10); and a control device (200) for controlling the inverter devices (7, 10). In the control device (200), when a malfunction has occurred in a device necessary for supplying current to the motor (9), another process that corresponds to the process that prior to the malfunction was being executed by the device in which the malfunction occurred is executed by another normal device to drive the motor (9). Traveling movement can therefore continue even when a malfunction has occurred in part of the travel power supply system.