115results 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.

The present invention provides a hybrid industrial vehicle which prevents the battery from water splash.A hybrid industrial vehicle has a combination of an engine and a motor as a drive source for load handling or traveling, a battery as a power source for the motor and a counterweight. The battery is disposed on the counterweight and is located above the center of the counterweight as measured in the vertical direction between the highest and the lowest ends thereof.

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 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.

A skid steer vehicle has a chassis with four drive wheels suspended from the chassis that are damped by four damping cylinders. An electronic controller varies the damping of the cylinders in an automatic mode, based on certain operational parameters of the vehicle, and in a manual mode in response to operator selection of a desired degree of suspension damping.

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.

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 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.

The present invention relates to an earth-conveying equipment (1), especially a fork lift truck which comprises a driving part (2) and a bearing part (3), wherein, the area of the bearing part (3) is arranged with at least two bearing rollers (10), the area of the driving part (2) is arranged with at least one rotatable driving wheel (4) and at least one rotating roller (5a and 5b) which can rotate around one vertical axis and are arranged while the vertical movement is allowed and are supported by means of one spring shock absorbing device (12a and 12b). To improve the stability of the earth-conveying equipment the spring shock absorbing device (12a and 12b) comprises a shock absorbing device which functions when the rotating roller (5a and 5b) suspending protrudes and suspending retreat, especially a hydraulic shock absorbing device, and / or the spring shock absorbing device (12a and 12b) comprises a transition spring characteristic curve.

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 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.

A vertically-adjustable caster wheel apparatus for use on a forklift truck, material handling cart, and the like. The caster wheel apparatus of the present invention provides a yolk frame having a pivot pin connected to and extending through the yolk frame. A wheel frame has one end pivotally connected to the yolk frame and a second end rotatably connected to a wheel. An elastic member has a first retainer connected to one end of the elastic member and a second retainer connected to an opposite end of the elastic member, wherein the first retainer is connected to the pivot pin in the yolk frame to allow the elastic member to pivot with respect to the yolk frame. Means for adjusting the vertical height of the wheel is provided by adjusting the angle of the wheel frame relative to the yolk frame.

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.

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.

An industrial vehicle which is equipped with an engine and having an Eco-mode in which torque of the engine is restricted includes an accelerator, an accelerator opening detector that detects an opening of the accelerator, a vehicle speed detector that detects a speed of the vehicle, an engine speed detector that detects a speed of the engine, and a torque restriction releasing unit which, when the torque of the engine is restricted, if conditions that the opening of the accelerator detected by the accelerator opening detector is a first predetermined value or greater, that the vehicle speed detected by the vehicle speed detector is a second predetermined value or smaller and that the engine speed detected by the engine speed detector is a third predetermined value or smaller are satisfied, releases the torque restriction.