KANZAKI KOKYUKOKI MFG. CO., LTD.
|KANZAKI KOKYUKOKI MFG. CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20130281236||CONTINUOUSLY VARIABLE TRANSMISSION AND WORKING VEHICLE - A belt type variable speed-change mechanism transmitting a rotational power from a driving shaft to a driven shaft in a continuously variable manner and a constant-speed power-transmitting mechanism transmitting a rotational power at a constant-speed from the driving shaft to a constant-speed driven-side rotational body supported by the driven shaft in a relatively rotatable manner with respect thereto are accommodated in a casing. A planetary gear mechanism including a first element receiving a variable-speed rotational power through the driven shaft, a second element receiving a constant-speed rotational power through the constant-speed driven-side rotational body and a third element outputting a combined rotational power is supported by the driven shaft in the casing.||10-24-2013|
|20130269328||Hydrostatic Stepless Transmission - A hydrostatic stepless transmission (“HST”) includes a center casing into which a plunger block of a hydraulic pump and a plunger block of a hydraulic motor are inserted. Plunger ports are open and aligned peripherally on an outer peripheral surface of each plunger block. A pair of main fluid passages of a closed fluid circuit fluidly connecting the hydraulic pump to the hydraulic motor are formed in opposite side portions of the center casing. Each of the main fluid passage includes peripheral grooves formed on an inner peripheral surface of the center casing so as to face the plunger ports of the respective plunger blocks, and includes an axial fluid duct formed to be interposed between the peripheral grooves. A bearing gap is provided between the inner peripheral surface of the center casing and the outer peripheral surface of the plunger block so as to cause a dynamic pressure action of fluid.||10-17-2013|
|20130205766||Hydrostatic Transmission - A hydrostatic transmission comprises a hydraulic pump, a hydraulic motor, first and second main fluid passages fluidly connecting the hydraulic pump to the hydraulic motor so as to constitute a closed fluid circuit, a charge fluid passage, a plurality of first charge check valves and a plurality of second charge check valves. The plurality of first charge cheek valves are interposed between the charge fluid passage and the first main fluid passage so as to allow only flow of fluid from the charge fluid passage to the first main fluid passage when the first main fluid passage is hydraulically depressed relative to the charge fluid passage. The plurality of second charge check valves are interposed between the charge fluid passage and the second main fluid passage so as to allow only flow of fluid from the charge fluid passage to the second main fluid passage when the second main fluid passage is hydraulically depressed relative to the charge fluid passage.||08-15-2013|
|20130133970||Electrically-Operated Hydraulic Actuator Unit and Hydraulic Four-Wheel-Drive Work Vehicle - Provided an electrically-operated hydraulic actuator unit that includes an electrically-operated motor controlled by a control apparatus and actuating a volume adjusting mechanism through driving-side and driven-side arms, and a clutch mechanism in which the driven-side arm presses a contact member against a clutch case so that the driven-side arm is locked when a force from the volume adjusting mechanism is applied to the driven-side arm. The control apparatus can set duties of first to fourth drive signals to be output to the electrically-operated motor in a neutral-side start period, a neutral-side ordinary actuation period, a higher-volume-side start period and a higher-volume-side ordinary actuation period. The duties of the first and fourth drive signals are larger than that of the second drive signal, the duty of the third drive signal is larger than that of the fourth drive signal, and an integrated ON-time of the third drive signal is larger than that of the first drive signal.||05-30-2013|
|20130098702||HYDRAULIC FOUR-WHEEL-DRIVE WORK VEHICLE - At least one of first and second hydraulic motor units that drive first and second wheels is of a variable displacement. A volume adjusting mechanism thereof is operated by an electric motor in accordance with manual operation or automatic operation based on difference in turning radius between the first and second wheels. A control device that controls the electric motor includes normal mode that operates the electric motor in accordance with the manual operation or the automatic operation and torque-up mode that fixes the variable displacement hydraulic motor to a first volume larger than a standard volume, and activates the torque-up mode at idling state in which a power source is in operating state and a pump-side volume adjusting mechanism is in neutral state and shifts the torque-up mode to the normal mode when a traveling speed reaches a first speed.||04-25-2013|
|20130015005||WORKING VEHICLE WITH ELECTROMAGNETIC BRAKEAANM KOGA; KazunariAACI AmagasakiAACO JPAAGP KOGA; Kazunari Amagasaki JPAANM WANG; HongkunAACI AmagasakiAACO JPAAGP WANG; Hongkun Amagasaki JPAANM MATSUURA; JunAACI AmagasakiAACO JPAAGP MATSUURA; Jun Amagasaki JPAANM SASAHARA; KengoAACI AmagasakiAACO JPAAGP SASAHARA; Kengo Amagasaki JPAANM ISHINO; FumitoshiAACI AmagasakiAACO JPAAGP ISHINO; Fumitoshi Amagasaki JP - A lawnmower vehicle which is a working vehicle with an electromagnetic brake includes left and right electromagnetic brakes, a brake relay which is a common brake releasing unit, and an ECU. The ECU compares electricity supply states of the left and right electromagnetic brakes, and controls the brake relay to disconnect an electrical connection between a battery and the left and right electromagnetic brakes, and to brake left and right wheels when a difference in the electricity supply states compared by a comparator exceeds an allowable upper limit.||01-17-2013|
|20120097460||HYDRAULICALLY-POWERED WORKING VEHICLE - A hydraulically powered working vehicle includes a turning section provided at an upper side of a travel unit capable of turning, and hydraulic circuits for the working vehicle. The hydraulic circuit for the working vehicle has a first actuator group including a one side traveling motor, a first variable capacity pump for driving the first actuator group, a second actuator group including an other side traveling motor and a turning motor, and a second variable capacity pump for driving the second actuator group. The second variable capacity pump is set so that a maximum value for discharge capacity per unit time becomes large compared to that of the first variable capacity pump.||04-26-2012|
|20120097022||PUMP UNIT - A pump unit includes a variable capacity pump, and a balanced piston mechanism having a piston body, connected to an operation section of a variable swash plate, provided inside a cylinder, capable of sliding in an axial direction. The balanced piston mechanism has first, second and third pressure receiving chambers provided in the cylinder. Primary side and the secondary side working fluid pressures of an actuator switching valve are respectively introduced to the first receive pressure chamber and the second pressure receiving chamber, and a set pressure that has been previously set, corresponding to a working fluid differential pressure arising before and after passing through the actuator switching valve, in a steady state of the operating position of the actuator switching valve is introduced to the third pressure receiving chamber.||04-26-2012|
|20110155486||ELECTRIC VEHICLE - A electric vehicle comprises a drive wheel which is driven by a traction electric motor, a brake command device, a brake releasing unit, a brake shaft, a friction plate, and a braking spring. The brake shaft is rotatable in a brake realizing direction which is one direction by an operation of the brake command device, and is rotatable in a brake releasing direction which is the other direction by driving of the brake releasing unit. The friction plate is operatively connected to the traction electric motor, and is frictionally braked when the brake shaft is rotated in the brake realizing direction. The braking spring applies an elastic force to the brake shaft in a direction to rotate the brake shaft in the brake realizing direction. The brake releasing unit comprises a brake releasing motor, a displacement member which is displaced by driving of the brake releasing motor, and a displacement permitting spring which permits elastic relative displacement between the displacement member and the brake shaft, and applies an elastic force to the brake shaft in a direction to maintain a relative position between the brake shaft and the displacement permitting spring.||06-30-2011|
|20110127093||RIDING-TYPE GROUND WORKING VEHICLE - A riding-type ground working vehicle includes left and right wheels, a command value calculating section, a yaw rate detecting section that detects a yaw rate of the vehicle, a target yaw rate calculating section, a correction coefficient acquiring section, and a control section. The left and right wheels are independently driven to travel by two respective traction motors. The command value calculating section calculates target rotational speed command values for the two traction motors based on an acceleration instruction and a turn instruction input by a driver. The target yaw rate calculating section calculates a target yaw rate based on the acceleration instruction and the turn instruction. The correction coefficient acquiring section acquires two correction coefficients respectively relating to the two traction motors based on a deviation between the target yaw rate and a yaw rate detection value. The control section corrects the two target rotational speed command values by the two correction coefficients, and controls drive of the two traction motors based on the corrected two target rotational speed command values.||06-02-2011|
|20100206647||RIDING WORK VEHICLE - A riding work vehicle includes right and left wheels, at least one caster wheel, and a working machine. The lawnmower vehicle further includes traveling motor, steering motor, a traveling system clutch, and a steering system clutch. The traveling system clutch is configured to disable transmission of the rotational force from an axle of the caster wheel to the traveling motor in a state where the traveling motor is deactivated. The steering system clutch is configured to disable transmission of the rotational force from a steering shaft for the caster wheel to the steering motor in a state where the steering motor is deactivated.||08-19-2010|
|20090260901||ELECTRIC GROUND WORKING VEHICLE - There is provided an electric ground working vehicle including a left wheel and a right wheel, at least one caster, a working apparatus, an acceleration operating element for performing acceleration instructions, a turn operating element for performing turn instructions, and a control unit. The left wheel and the right wheel are independently driven by left and right electric motors respectively. The control unit controls a regenerative brake driving unit so that electric power is regenerated from the left and right electric motors to an electric power source unit when the acceleration operating element is not operated during traveling to regeneratively brake the left and right wheels. The control unit controls the brake force of the wheels so that the brake force of the wheel at the inside of a turn, among the left wheel and the right wheel, can be made greater than the brake force of the wheel at the outside of a turn when the acceleration operating element is not operated during traveling and turn instructions are inputted from the turn operating element.||10-22-2009|
Patent applications by KANZAKI KOKYUKOKI MFG. CO., LTD.