Abstract: Disclosed is a transmission device for work vehicles, said transmission device being capable of being used with high-horsepower engines, without an accompanying loss of power transmission efficiency or fuel economy. The transmission device is provided with: an input shaft that transmits power from an engine; a continuously-variable transmission that is disposed on the input shaft and outputs power transmitted from the input shaft, steplessly converting the speed thereof; and a reversing clutch device that outputs, either in a forward rotational direction or a reverse rotational direction, power outputted from the continuously-variable transmission. The reversing clutch device can be selectively switched, and the gear ratio can be steplessly changed by the continuously-variable transmission.

Abstract: Disclosed is a transmission device for work vehicles, said transmission device being capable of being used with high-horsepower engines, without an accompanying loss of power transmission efficiency or fuel economy. The transmission device is provided with: an input shaft that transmits power from an engine; a continuously-variable transmission that is disposed on the input shaft and outputs power transmitted from the input shaft, steplessly converting the speed thereof; and a reversing clutch device that outputs, either in a forward rotational direction or a reverse rotational direction, power outputted from the continuously-variable transmission. The reversing clutch device can be selectively switched, and the gear ratio can be steplessly changed by the continuously-variable transmission.

Abstract: A belt-type stepless transmission is provided with: an input shaft; an input pulley having a stationary sheave and a movable sheave; a transmission shaft disposed parallel to the input shaft; an output pulley having a stationary sheave and a movable sheave; a belt wound around the input pulley and the pulley; an output shaft disposed coaxially with the transmission shaft; and a cam mechanism having a sheave-side cam which is provided and affixed to the movable sheave and a shaft-side cam which is provided and affixed to the output shaft and causing the sheave-side cam and the shaft-side cam to make contact with each other to thereby enable the transmission of torque between the movable sheave and the output shaft and apply an axial pressing force corresponding to the torque to the movable sheave.

Abstract: Disclosed is a transmission device for work vehicles, said transmission device being capable of being used with high-horsepower engines, without an accompanying loss of power transmission efficiency or fuel economy. The transmission device is provided with: an input shaft (20) that transmits power from an engine (3); a continuously-variable transmission (40) that is disposed on the input shaft (20) and outputs power transmitted from the input shaft (20), steplessly converting the speed thereof; and a reversing clutch device (50) that outputs, either in a forward rotational direction or a reverse rotational direction, power outputted from the continuously-variable transmission (40). The reversing clutch device (50) can be selectively switched, and the gear ratio can be steplessly changed by the continuously-variable transmission (40).

Abstract: An engine exhaust gas purifier includes a filter, a hydraulic load mechanism, a clog detector and a forced actuation valve. The filter purifies the exhaust gas of the engine. The hydraulic load mechanism is driven by the engine's power. The clog detector detects a clogging state of the filter. The forced actuation valve forcibly increases an actuation amount of the hydraulic load mechanism. The filter is regenerated by increasing an engine load while maintaining an engine rotating speed, by increasing the actuation amount of the hydraulic load mechanism with an actuation of the forced actuation valve on the basis of detection information of the clog detector.

Abstract: A hydraulic stepless transmission having increased layout freedom and a compact structure with the functions of conventional hydraulic stepless transmission retained and having increased easiness of production. In the hydraulic stepless transmission, the movable swash plate (input side swash plate) of a variable displacement plunger hydraulic pump or motor is tilted by a hydraulic servo mechanism. The hydraulic servo mechanism has a power piston connected to one end of the input side swash plate for tilting the swash plate, a servo spool (13) placed normal to the direction of sliding of the power piston and substantially parallel to the input side swash plate, and a feedback link for connecting the servo spool and the input side swash plate.

Abstract: A belt-type stepless transmission is provided with: an input shaft; an input pulley having a stationary sheave and a movable sheave; a transmission shaft disposed parallel to the input shaft; an output pulley having a stationary sheave and a movable sheave; a belt wound around the input pulley and the pulley; an output shaft disposed coaxially with the transmission shaft; and a cam mechanism having a sheave-side cam which is provided and affixed to the movable sheave and a shaft-side cam which is provided and affixed to the output shaft and causing the sheave-side cam and the shaft-side cam to make contact with each other to thereby enable the transmission of torque between the movable sheave and the output shaft and apply an axial pressing force corresponding to the torque to the movable sheave.

Abstract: Disclosed is a transmission device for work vehicles, said transmission device being capable of being used with high-horsepower engines, without an accompanying loss of power transmission efficiency or fuel economy. The transmission device is provided with: an input shaft (20) that transmits power from an engine (3); a continuously-variable transmission (40) that is disposed on the input shaft (20) and outputs power transmitted from the input shaft (20), steplessly converting the speed thereof; and a reversing clutch device (50) that outputs, either in a forward rotational direction or a reverse rotational direction, power outputted from the continuously-variable transmission (40). The reversing clutch device (50) can be selectively switched, and the gear ratio can be steplessly changed by the continuously-variable transmission (40).

Abstract: In an exhaust gas purifier provided in an engine, a filter regeneration control recovering a PM collecting capacity of filter means on the basis of a chemical reaction can be efficiently executed by a simple structure. An exhaust gas purifier in accordance with the present invention is provided with a particulate filter (50) for purifying an exhaust gas arranged in an exhaust path of an engine (5), an actuation portion hydraulic pump (101) driving on the basis of a power of the engine (5), a pressure sensor (68) capable of detecting a clogging state of the particulate filter (50), and a pressure control valve (104) and a switching solenoid valve (106) for forcibly increasing an actuation amount of the actuation portion hydraulic pump (101).

Abstract: When starting raw material powder is passed through a pair of rolls (2a), plastic working is applied to the starting raw material powder, and the crystal grain diameter of a metal or alloy constituting a matrix of the powder particle after processed is miniaturized. According to the thus provided alloy powder raw material, the maximum size of the powder particle is not more than 10 mm and the minimum size of the powder particle is not less than 0.1 mm, and the maximum crystal grain diameter of the metal or alloy constituting the matrix of the powder particle is not more than 30 ?m.

Abstract: A control apparatus for a tractor or wheel loader includes a speed change sensor that detects the step-on amount of a speed change pedal, an actuator that regulates a swash plate angle of a hydraulic pump based on the detection value of the speed change sensor, a transmission output unit rotation sensor that detects the revolution speed of an output shalt, and a control unit. When the speed change pedal is not stepped on, a braking force is applied to travel wheels and both of a forward drive clutch and a reverse drive clutch are disengaged. When a transmission drive output detected with the transmission output unit rotation sensor is not more than a fixed forward or reverse drive switching speed, either the forward drive clutch or the reverse drive clutch is engaged as the speed change pedal is stepped on.

Abstract: A raw magnesium alloy powder material having a relatively small crystal grain diameter is obtained by subjecting a starting material powder having a relatively large crystal grain diameter to a plastic working in which the powder is passed through a pair of rolls to undergo compressive deformation or shear deformation. The starting material powder is a magnesium alloy powder having a fine intermetallic compound (21) precipitated and dispersed in a base (22) by a heat treatment. A work strain (22) is formed around the precipitated intermetallic compound (21) in the magnesium alloy powder after processed by the plastic working. The magnesium alloy powder after processed by the plastic working has a maximum size of 10 mm or less and a minimum size of 0.1 mm or more, and the magnesium particle constituting the base (20) has a maximum crystal grain diameter of 20 ?m or less.

Abstract: [Problems] A hydraulic stepless transmission having increased layout freedom and a compact structure with the functions of conventional hydraulic stepless transmission retained and having increased easiness of production. [Means for Solving Problems] In the hydraulic stepless transmission (1), the movable swash plate (input side swash plate (6)) of a variable displacement plunger hydraulic pump or motor is tilted by a hydraulic servo mechanism (3). The hydraulic servo mechanism (3) has a power piston (15) connected to one end of the input side swash plate (6) and tilting it, a servo spool (13) placed normal to the direction of sliding of the power piston (15) and substantially in parallel to the input side swash plate (6), and a feedback link (24) for connecting the servo spool (13) and the input side swash plate (6).

Abstract: Various works of a tractor or wheel loader that require frequent operations of start, stop, and switching between the forward drive and reverse drive that are repeated alternately can be performed very easily. The control apparatus comprises a speed change sensor that detects the step-on amount of a speed change pedal, an actuator that regulates the swash plate angle of a hydraulic pump based on the detection value of the speed change sensor, a transmission output unit rotation sensor that detects the revolution speed of an output shaft, and a control unit.

Abstract: When starting raw material powder is passed through a pair of rolls (2a), plastic working is applied to the starting raw material powder, and the crystal grain diameter of a metal or alloy constituting a matrix of the powder particle after processed is miniaturized. According to the thus provided alloy powder raw material, the maximum size of the powder particle is not more than 10 mm and the minimum size of the powder particle is not less than 0.1 mm, and the maximum crystal grain diameter of the metal or alloy constituting the matrix of the powder particle is not more than 30 ?m.

Abstract: The present invention relates to hydraulic equipment comprising input shaft (2) and output shaft; first and second plungers (8, 10) and first and second spool valves (9, 11) which are moved reciprocally axially; a cylinder block (7) which houses the plungers and spool valves and is rotated integrally with the input shaft; an input side swash plate (6) which touches the first plungers; and an output side swash plate (12) which touches the second plungers and is rotated integrally with the output shaft. The purpose of the present invention is to reduce number of parts concerning to the accuracy of the reciprocal movement of the first and second spool valves. Spool valve guides (37 and 47) on which guide grooves (37b and 47b) slanted against axis of the rotary shaft are formed, and the first or second spool valve is engaged with a holding member (38 or 48) attached to the guide groove or the guide groove.

Abstract: A hydraulic stepless transmission comprises a first hydraulic system. Formed in a cylinder block are first and second plunger holes that contain first and second plungers, respectively, a hydraulic closed circuit that connects the first and second plunger holes, and distributing valve holes that contain distributing valves, which switch flow direction of hydraulic fluid in the circuit. A shaft and cylinder block synchronously rotate, with the first and second plunger holes formed in parallel to the shaft, respectively, and the swash plate of the second hydraulic system is rotatably supported around the shaft. The first and second plungers are urged toward the swash plates by springs provided in the corresponding first and second plunger holes, respectively.

Abstract: A hydraulic continuously variable transmission has a variable displacement type first hydraulic system having a first plunger and a plunger abutting section which actuates the first plunger, and a second hydraulic system having a second plunger and provided with an output rotary section which rotates with abutment on the second plunger. A cylinder block rotates about an axis and has a first plunger hole and a second plunger hole which respectively retain the first and second plungers. A hydraulic closing circuit connects the first and second plunger holes and circulates a working oil between the first and second plunger holes. The continuously variable transmission has a distributing valve for controlling circulation of the working oil in the hydraulic closing circuit, a valve hole, formed in the cylinder block, for retaining the distributing valve, and a shaft which penetrates the cylinder block.

Abstract: The present invention relates to hydraulic equipment comprising input shaft (2) and output shaft; first and second plungers (8, 10) and first and second spool valves (9, 11) which are moved reciprocally axially; a cylinder block (7) which houses the plungers and spool valves and is rotated integrally with the input shaft; an input side swash plate (6) which touches the first plungers; and an output side swash plate (12) which touches the second plungers and is rotated integrally with the output shaft. The purpose of the present invention is to reduce number of parts concerning to the accuracy of the reciprocal movement of the first and second spool valves. Spool valve guides (37 and 47) on which guide grooves (37b and 47b) slanted against axis of the rotary shaft are formed, and the first or second spool valve is engaged with a holding member (38 or 48) attached to the guide groove or the guide groove.

Abstract: A hydraulic stepless transmission comprises a first hydraulic system which has first plungers and a swash plate which the first plungers abut on, and a second hydraulic system which has second plungers and a swash plate which the second plungers abut on. In a cylinder block, first and second plunger holes which contain first and second plungers respectively, a hydraulic closed circuit which connects the first and second plunger holes, and distributing valve holes which contain distributing valves which switch a flow direction of hydraulic fluid in the circuit are formed. A shaft, which extends through the cylinder block, and the cylinder block synchronously rotate. The first and second plunger holes are formed in parallel to the shaft respectively. The swash plate of the second hydraulic system is rotatably supported around the shaft. The shaft is supported by a combined thrust and radial bearing and a radial bearing on both sides of the cylinder block, respectively.