Kanzaki Kokyukoki Mfg. Co., Ltd.

Other

Tuff Torq Corporation

Hirohiko Kawada

Norihiro Ishii

Koji Irikura

Robert Abend

Ryota Ohashi

Hiroaki Shimizu

Toshiyuki Hasegawa

Kenichi Takada

Keith Johnson Andrews

Hiroshi Tottori

Kentaro Nagata

Hideki Kanenobu

Hideaki Okada

Koji Iwaki

Tomoyuki Ebihara

Yoshitaka Ishimaru

Tomoyuki Tsuji

Travis S McCloud

Kenji Shiba

Koji Sakata

Hidemi Harada

Koga Yamane

Etsuo Miyake

Masaki Watanabe

Hiroki Maehara

Kosuke Onoda

Ryoichi Kawai

Rei Maeda

Seishi Kosegawa

Kohji Irikura

Yoshinori Suetsugu

Takemi Kamada

A riding type vehicle has a driving source, a left wheel and a right wheel, a transmission configured to receive power from the driving source to independently operate and drive the left wheel and the right wheel with regard to a rotation direction and a rotation speed, and caster wheels separately provided in a front-rear direction with respect to the left wheel and the right wheel, the riding type vehicle including two first sensors arranged on both left and right sides more to a front side than a rear end of the vehicle, the two first sensors configured to detect an obstacle target located on a rear side, the obstacle target being a target becoming an obstacle at the time of reversing or turning.

Riding type vehicle

There is provided a PTO transmission structure including a PTO driving shaft operatively connected to a driving source, a PTO driven shaft arranged in a downstream side in a transmission direction of the PTO driving shaft, a PTO clutch unit for selectively performing power transmission/power interruption from the PTO driving shaft to the PTO driven shaft, and a transmission case for supporting the PTO driving shaft and the PTO driven shaft and for accommodating the PTO clutch unit. The transmission case has a case main body which includes a first wall having a first hole for supporting the PTO driving shaft, and a second wall having a second hole for supporting the PTO driven shaft, the second wall being spaced apart from the first wall so as to define a first accommodating space to position the PTO clutch unit between the first wall and the second wall. The PTO clutch unit includes a drive-side member operatively connected to the PTO driving shaft, and an output shaft member operatively connected to the PTO driven shaft. Each of the PTO driving shaft and the PTO driven shaft is connected to the drive-side member and the output shaft member, respectively, of the PTO clutch unit by inserting the PTO driving shaft through the first hole from the upstream side in the transmission direction of the first wall and inserting the PTO driven shaft through the second hole from the downstream side in the transmission direction of said second wall with said PTO clutch unit positioned in the first accommodating space.

PTO transmission structure

A vehicle including an integral transaxle apparatus with axles, a driving hydrostatic transmission (HST), a steering HST, and a differential unit. Driving operating means for slanting operation of a first movable swash plate of the variable displacement driving hydraulic pump for switching the travelling direction between forward and backward and for changing the travelling speed, and steering operating means for slanting operation of a second movable swash plate of the variable displacement steering hydraulic pump so as to determine the leftward and rightward cornering angle are provided. The steering hydraulic motor has a third movable swash plate interlocking with the driving operating means so that the slanting direction of the third movable swash plate is changed according to the operation of the driving operating means, whereby the vehicle turns laterally in the same direction in response to the steering operating means whether the vehicle travels forward or backward.

Vehicle improved in steering

In a transmission for a working vehicle, a working unit includes a hydraulic power unit and a valve unit enclosed in a first bulging portion of a transmission case closer to an upper side or on a top surface thereof and connected with each other along a vehicle lengthwise direction. The first bulging portion is closer to a first lateral side along the vehicle width direction of the transmission case, while a hydraulic pump is located closer to a second lateral side. Hydraulic fluid is drawn from the transmission case, around a lower side of the hydraulic pump, through a suction port thereof, and discharged to a suction port of the valve unit. The hydraulic power unit includes a cylinder tube and piston, extending in the lengthwise direction, and a support shaft, extending along the width direction, which is supported by the transmission case and connected to a lift arm.

Transmission for a working vehicle

In a transmission for a working vehicle, a PTO input shaft is located with its rotational axis extending in a vehicle lengthwise direction substantially at a widthwise center of a transmission case along a vehicle width direction. A running power input shaft is located with its rotational axis extending in the vehicle lengthwise direction substantially at the same position as that of the PTO input shaft along the vehicle width direction and at a lower side of the PTO input shaft. The transmission case provides an accommodation space for accommodating a differential gear unit, which space is displaced to a first lateral side of the vehicle along the vehicle width direction. A running power transmission shaft is located on the front side of the space with its axis extending in the vehicle lengthwise direction, and the running power input shaft, the running power transmission shaft and the differential gear unit are interlocked to each other via a running power gear train.

Power transmission arrangement of a working vehicle and transmission for the working vehicle

In a power transmission arrangement, a working unit includes a hydraulic power unit and a valve unit enclosed in a first bulging portion of a transmission case closer to an upper side or on a top surface thereof and connected with each other along a vehicle lengthwise direction. The first bulging portion is closer to a first lateral side along the vehicle width direction of the transmission case, while a hydraulic pump is located closer to a second lateral side. Hydraulic fluid is drawn from the transmission case, around a lower side of the hydraulic pump, through a suction port thereof, and discharged to a suction port of the valve unit. The hydraulic power unit includes a cylinder tube and piston, extending in the lengthwise direction, and support shaft, extending along the width direction, which is supported by the transmission case and connected to a lift arm.

Vehicle improved steering

A power take-off casing ( ) including therein a rear-PTO shaft ( ) and a transmission mechanism ( ) therefor is mounted on an outer surface of a rear wall ( ) of the transmission casing ( ) disposed between left and right rear wheels ( ) which constitute drive wheels for a working vehicle, and a gear ( ) constituting an input member of the transmission mechanism is operatively connected to a drive mechanism ( ) for a mid-PTO shaft ( ) which extends forwardly from the inside of transmission casing through a front wall ( ) thereof. A clutch ( ) for selectively cutting-off the drive of the rear-PTO shaft is provided preferably such that it couples the gear selectively to a drive gear ( ) which is rotatably mounted on the mid-PTO shaft. In a working vehicle in which a transmission casing is disposed between left and right front wheels constituting the drive wheels for the vehicle, a power take-off casing having a front-PTO shaft is mounted on an outer surface of a front wall of the transmission casing.

Power take-off assembly for working vehicles

A transaxle apparatus provided with a planetary gear type differential The differential comprises a pair of co-axial axles, a sun gear, a center gear serving as a driving input gear, a pair of carriers, a pair of ring gears serving as steering input gears, and planet gears. The center gear interlocks with the sun gear. The pair of carriers are fixedly disposed around the respective axles oppositely to each other with respect to the center gear. The pair of ring gears are rotatably disposed around the respective carriers so as to slidably abut at their inner peripheral surfaces against outer peripheral surfaces of the respective carriers. Each of the ring gears is extended between the sun gear and each of the carriers disposed in the ring gear so as to be inner peripherally formed into an internal gear. Each of the carriers is integrally provided with a plurality of projections projecting toward the center gear between the sun gear and the internal gear. The planet gears are rotatably disposed around the respective projections of the carrier so as to engage with the sun gear and the internal gear. The projection is preferably formed of the carrier. Tips of teeth of the internal gear are extended toward the axis of the axle further than the inner peripheral surface of the ring gear slidably abutting against the outer peripheral surface of the carrier.

Transaxle apparatus

An integral-type transaxle apparatus comprising a single housing in which a pair of driving axles, a differential mechanism for differentially connecting both said driving axles to each other, a driving hydraulic stepless transmission which fluidly connects a hydraulic pump and a hydraulic motor, a steering hydraulic stepless transmission which fluidly connects a hydraulic pump and a hydraulic motor, a mechanical transmission for transmitting outputs of both said hydraulic stepless transmissions to said differential mechanism are accommodated, wherein at least one of said hydraulic stepless transmissions is disposed such that a rotational axis of a pump shaft of said one hydraulic stepless transmission and a rotational axis of a motor shaft of said one hydraulic stepless transmission are perpendicular to each other.

Integral-type hydraulic and mechanical transaxle apparatus for driving and steering a vehicle

A vehicle is installed with an integral transaxle apparatus constructed so that a single housing contains left and right axles, a driving hydrostatic transmission (HST) having a variable displacement first hydraulic pump and a first hydraulic motor fluidly connected with each other, a steering HST having a variable displacement second hydraulic pump and a variable displacement second hydraulic motor fluidly connected with each other, and a differential unit differentially connecting the axles with each other so as to be driven regularly or reversely by the output of the driving HST and to differentially drive the axles while receiving the output of the steering HST, wherein the first hydraulic pump receives power of a prime mover and has a first movable swash plate, and the second hydraulic pump receives power of the prime mover independently of the first hydraulic pump and has a second movable swash plate. The vehicle is also provided with driving operating means for slanting operation of the first movable swash plate for switching the travelling direction between forward and backward and for changing the travelling speed, and steering operating means for slanting operation of the second movable swash plate so as to determine the leftward and rightward cornering angle. The second hydraulic motor has a third movable swash plate interlocking with the driving operating means so that the slanting direction of the third movable swash plate is changed oppositely with respect to its neutral position according to the travelling direction switching operation of the driving operating means, whereby the vehicle turns laterally in the same direction of leftward and rightward steering operation of the steering operating means whether the vehicle travels forward or backward.

A transaxle apparatus is constructed so that left and right axles, two hydrostatic transmissions (HSTs), one for driving a vehicle and the other for steering it, and a differential unit for differentially connecting said axles with each other are together contained in a housing. The driving HST is disposed so that its hydraulic pump and motor are aligned along either a left or right side of the housing. The steering HST is disposed so that its hydraulic pump and motor are aligned along either a front or rear side of the housing. The differential unit is laterally opposite to the driving HST. Either the left or right axle crosses the driving HST between its hydraulic pump and motor. The two HSTs are provided with one or two flat center sections disposed in the housing. The cylinder blocks of the hydraulic pumps and motors of the two HSTs are mounted on either a top or bottom surface of the center section or sections. Power transmission mechanisms for transmitting output power from the hydraulic motors of the two HSTs into the differential unit are disposed on an opposite side of the center section(s) as the cylinder blocks. A charge pump may be attached onto the center section, and a conduit for sending fluid discharged from the charged pump into one or both HSTs may be partly extended outside the housing so as to be cooled by the atmosphere.

Integral hydrostatic transaxle apparatus for driving and steering

A working vehicle having a main transaxle casing supporting a first PTO shaft and a center-pivot transaxle casing supporting second PTO shaft, improved in a transmission system for the second PTO shaft. Particularly, the center-pivot transaxle casing is provided at the portion thereof lower than its pivot with the second PTO shaft. The output power of the first PTO shaft is transmitted to the second PTO shaft by a propeller shaft and universal joints. If a working machine to be driven by the first PTO shaft is disposed between the both transaxle casings, the output power of the first PTO shaft is transmitted to the working machine, and afterward to the second PTO shaft.

Working vehicle

A differential gear assembly includes a disc-shaped input gear receiving drive force and having a central portion, an outer portion around the central portion, and one or more open space portions formed between the central portion and the outer portion. A pair of output shafts extend opposite each other along the axis of the input gear and one end of each of the output shafts is loosely fitted in a central bore formed in the central portion of the input gear. A pair of side bevel gears is provided each of which is fixedly attached near the end of each output shaft closer to the input gear. One or more support shafts extend radially from the central portion into the open space portions of the input gear. One or more bevel pinions is rotatably supported on the one or more support shafts, respectively, to mesh with the pair of side bevel gears. A friction mechanism is located in at least one of one or more open space portions that permits the bevel pinion to rotate with rotational resistance. With this construction, since it is possible to provide a limited slip effect without using a casing-shaped ring gear, the resulting assembly can be made compact and less costly.

Differential gear assembly with disc-shaped input member

A differential locking system of an axle driving apparatus wherein left and right axles are rotatably supported within a housing consisting of an upper half housing and a lower half housing. The inner ends of the axles are facing each other and are rotatably inserted within a differential input gear. An engaged plate member is disposed at the right of the differential input gear. Engaged recesses of the differential input gear and engaged recesses of the engaged plate member are connected with each other. A pair of differential pinions are pivoted within the differential input gear, perpendicular to the axles. Both sides of each differential pinion are engaged with differential side gears fixed around the right and left axles, respectively. Pin passing holes are bored in the right differential side gear. A thrust collar is disposed on the right axle outside of the right differential side gear. A shifter fixing the differential locking pins is axially slidably disposed around the thrust collar. The differential locking pins pass through the corresponding pin passing holes and can be inserted into and removed from engaged recesses of the differential input gear and the engaged plate member. A shift fork holds the shifter horizontally and rotatably engages at the upper end thereof with an upper half housing and at the lower end thereof with a lower half housing. A differential locking arm is attached to the bottom surface of the lower half housing so as to rotate the shift fork.

Growing community of inventors

Hyogo, Japan

Hirohiko Kawada