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JP4185616B2 |
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JP2008281180A |
To solve the problems of being unable to avoid a cost increase and upsizing of a device, and being difficult to cope with a multiple pump as an installation position is restricted, due to the necessity of a large design change and a hydr...
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JP4178435B2 |
A vehicle propel system is disclosed, including a hydrostatic transmission having wheel motors (37L,37R) and a variable displacement pump (39), variable in response to a pump displacement command signal (51). The system involves determin...
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JP4180035B2 |
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JP4174364B2 |
A powertrain unit includes a hydraulic continuously variable transmission including a transmission housing, and a dipstick for checking an oil level in the housing. The width of the powertrain unit is reduced by positioning the dipstick ...
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JP2008256006A |
To improve the durability of a hydraulic drive device and smoothly start driving a working machine, in a hydraulic drive device in which a hydraulic motor body hydraulically driven by a hydraulic pump body operationally drives the workin...
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JP4167319B2 |
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JP2008224018A |
To provide a hydraulic drive configured so that a hydraulic motor body driven hydraulically by a hydraulic pump body drives a working machine actively.The hydraulic drive includes a capacity adjusting mechanism to change the capacity of ...
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JP4153991B2 |
A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft i...
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JP4150007B2 |
A hydrostatic transmission is disclosed comprising a radial ball pump (11) and a radial ball motor (13). The present invention includes a simplified dump valve member (107) comprising a single, unitary member which may be merely inserted...
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JP4141091B2 |
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JP4139720B2 |
In order to provide a rotationally balanced hydraulic swash plate plunger unit, a swash plate plunger pump casing is provided with an unbalanced flange to balance a casing which has a swash plate member therein, without requiring a separ...
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JP4109661B2 |
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JP4105557B2 |
A hydrostatic stepless transmission comprises a hydraulic pump and a hydraulic motor, at least one of the hydraulic pump and motor being variable in displacement; a closed circuit for fluidly connecting the hydraulic pump and motor to ea...
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JP4101083B2 |
A propelling transmission control apparatus for a working vehicle having a hydrostatic stepless transmission comprises a variable displacement type hydraulic pump (35), a change speed control mechanism (80) for converting a displacement ...
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JP4098938B2 |
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JP4086604B2 |
A lubricating system for a power unit for a vehicle with an internal combustion engine. A static oil hydraulic type non-stage transmission is disposed on a left lateral side of a crankshaft, and a lubricating oil tank is formed integrall...
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JP4073698B2 |
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JP2008062693A |
To provide a wheel motor device capable of preventing the difference of an oil pressure from occurring between a pair of first and second operation oil lines when a vehicle is forcedly tracted and reducing power loss at forced traction o...
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JP2008062691A |
To enhance the transmission efficiency of HST formed by a hydraulic pump body and both hydraulic motor bodies in a hydraulic drive type working vehicle in which a front side hydraulic motor body for operatively driving a front side drive...
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JP2008057638A |
To resolve a problem of a conventional hydraulic continuously variable transmission provided with a closed circuit composed by connecting a hydraulic pump and a hydraulic motor with a pair of oil circuits, and a charge circuit supplying ...
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JP2008045723A |
To solve a problem of requiring large force for traction of a working vehicle or the like to make working efficiency in traction or the like extremely low because a charge pump for supplying pressure oil does not function as a by-pass oi...
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JP4051313B2 |
A swash plate plunger type hydraulic motor is constituted such that plungers are slidably disposed in respective plunger holes of a motor cylinder, and a motor rolling member having a motor swash plate member is supported in a motor casi...
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JP4046954B2 |
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JP4040492B2 |
A change-speed control system is provided for a utility vehicle having a stepless change-speed apparatus for speed-changing an engine output and transmitting the speed-changed output to a traveling unit. The system includes an engine spe...
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JP2007333008A |
To provide a spool capable of reducing an operation noise of a hydraulic continuously variable transmission device, while securing a function of the spool. This hydraulic continuously variable transmission device 1 wherein an input side ...
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JP2007535633A |
Smaller and lighter hydraulic pump/motors provide remarkably improved volumetric efficiency with pistons having body portions substantially as long as the axial length of the respective cylinders in which they reciprocate. A plurality of...
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JP2007303637A |
To provide a hydrostatic continuously variable transmission capable of making effective use of an outside space by scheming a supporting structure for supporting a movable swash plate on both journaling portions of a transmission case. T...
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JP2007302146A |
To provide a transmission capable of accomplishing simplification of an operation oil feeding structure to a hydraulic servo mechanism capable of ensuring a free space between a drive source and it and changing/operating a volume adjustm...
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JP4012839B2 |
A pump and motor distribution valve formed by a hydraulic closed circuit for connection between a pump and a motor. In a hydraulic non-stage transmission CVT including a swash plate plunger type hydraulic pump P and a swash plate plunger...
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JP4012848B2 |
To reduce the projection of a swash plate servo mechanism in the radial direction, and to make a hydraulic continuously variable transmission compact, a swash plate plunger pump includes a pump casing provided with an input driven gear. ...
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JP4006493B2 |
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JP3986764B2 |
Distributing valves of a swash plate type hydraulic drive transmission can make a cylinder block smaller and reduce the number of processes and the number of parts. Distributing valves 63A alternately switch, corresponding to the axi...
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JP3986584B2 |
The invention relates to a hydrostatic continuously variable transmission with a simple structure, which merely involves changing the phase angle in the direction of eccentricity of the first eccentric ring arranged off center with respe...
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JP2007247821A |
To provide a hydraulic power transmission device having higher efficiency in an applicably effective manner while suppressing its energy loss. The hydraulic power transmission device A comprises a hydraulic pump 3 for discharging pressur...
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JP3974998B2 |
To moderate the efficiency of engine braking when it is applied while a continuously variable transmission produces a large transmission ratio. Such a continuously variable transmission is constituted by a hydraulic pump having an input ...
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JP3963050B2 |
To keep three other wheels in driving even if one of the wheels goes in idling using a simple configuration without providing any flow control valve or the like for restricting the differential motion. A hydraulic motor 22a for driving t...
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JP3962348B2 |
To effectively utilize an end part of a male screw formed on a screw shaft in a ball screw mechanism for controlling swing of a swash plate. A hydraulic motor M is constituted by a motor cylinder 32 having a motor plunger hole 32a, a mot...
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JP3954910B2 |
To solve a conventional problem of incapability of inserting a check valve wholly through a main circuit when it is inserted in a perpendicular direction to the main circuit in the case two hydraulic continuously variable transmissions a...
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JP2007192348A |
To provide a hydrostatic continuously variable transmission of a work vehicle for shortening idling, by quickly raising the oil temperature of oil flowing in an HST. This hydrostatic continuously variable transmission has two sets of a p...
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JP3943676B2 |
To easily form an orifice and to stabilize an orifice characteristic in a power transmission for a four-wheel drive vehicle provided with a hydraulic coupling device. A hydraulic coupling device H is provided with left and right vane pum...
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JP2007517716A |
A vehicle ( 1 ) utilizes a hydrostatic transmission arrangement ( 10, 11, 12, 13 ). This transmits drive force (F) from at least one first wheel ( 2 ) to at least one second wheel ( 3 ). The arrangement comprises a hydrostatic pump, whic...
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JP2007170612A |
To provide inexpensive hydraulic transmission device and machine capable of stopping rotation of an output shaft securely by stop operation, dispensing with a link mechanism from a driver's seat, and achieving satisfactory operation prop...
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JP2007162908A |
To provide a crawler traveling vehicle capable of equalizing tilting states of movable skew plates respectively disposed on right and left hydraulic pumps of HSTs in linear traveling.A hydraulic pressure correction valve 20 is disposed n...
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JP3930927B2 |
To dispense with piping between a charge pump and selector valves as well as to constitute the charge pump provided on a hydraulic transmission (HST) on a oil pressure source in relation to the selector valves for controlling a hydraulic...
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JP3926243B2 |
To provide a lawnmower in which outputs of a pair of left and right hydrostatic continuously variable transmissions are reduced to be transmitted to a pair of left and right travelling devices respectively through a pari of left and righ...
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JP3923147B2 |
To make a swash plate type hydraulic device compact in the radial direction by forming many spool type distribution valves which communicate a port of each cylinder hole with a low pressure oil passage and a high pressure oil passage and...
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JP3918544B2 |
To solve the problems of a stepless hydraulic transmission having a hydraulic pump shaft for inputting use and a hydraulic motor shaft for outputting use placed one above the other comprising the lowering of the bottom position of a rear...
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JP2007092809A |
To surely stop a vehicle in a slope by surely braking an engine, in regard to a hydrostatic continuously variable transmission provided with a hydraulic servo mechanism of structure for controlling tilting of a movable swash plate connec...
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JP3892840B2 |
To provide a hydraulic drive device in such constitution that the rotary output shaft of an electric motor is coupled directly to a hydraulic pump or a hydraulic motor to drive the hydraulic pump or the hydraulic motor, and forms a drive...
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