Kanzaki Kokyukoki Mfg. Co., Ltd.

Other

Tuff Torq Corporation

Kanzaki Kokyukoki Mfg. Col, Ltd.

Ryota Ohashi

Robert Abend

Norihiro Ishii

Hironori Sumomozawa

Kenichi Takada

Hiroaki Shimizu

Hideaki Okada

Masahisa Kawamura

Shigenori Sakikawa

Koji Irikura

Masaru Iida

Toshiyuki Hasegawa

Hirohiko Kawada

Kazuhiko Yano

Takeaki Nozaki

Jiro Shibata

Toshiro Azuma

Manabu Kawakami

Keith Johnson Andrews

Koichiro Fujisaki

Shusuke Nemoto

Shinya Sakakura

Hiroshi Tottori

Nobuhisa Kamikawa

Shigenori Sakigawa

Hideki Kanenobu

Kojiro Yamaoka

Yasuhisa Mochizuki

Kenji Shiba

Shinichi Hirose

Toshio Nagai

Kazuhiko Otsuki

Kohji Irikura

An axle driving apparatus for being mounted on the body frame of a vehicle and for independently rotating drive wheel members. The axle driving apparatus includes a first axle driving unit (L) having a housing () and a single axle (L), the single axle (L) defining a proximal end portion rotatbly mounted in the housing () and a distal end portion extending outwardly from a first side of the housing (). An enlarged region is defined by the housing (), with the enlarged region extending substantially perpendicular to the longitudinal axis of the single axle (L). A hydraulic stepless speed change assembly () is disposed within the enlarged region. The speed change assembly () includes a hydraulic pump () having an input shaft () projecting from the enlarged region and includes a hydraulic motor () including an output shaft () driving connected to the single axle (L). The first axle driving unit (L) is used in conjunction with a second axle driving unit (L) on the body frame of the vehicle and which is of substantially similar construction. However, the second axle driving unit (R) features a single axle (R) which extends outwardly from a second, opposite side of the housing () such that the axles (L,R) are oppositely disposed.

Axle driving apparatus

A pump unit applied to a working vehicle includes an input shaft operatively connected to an output shaft of a driving source, first and second hydraulic pump bodies, a pump housing that accommodates the first and second hydraulic pump bodies having respective rotational axis lines parallel to the input shaft, a PTO shaft, and a mounting housing that couples the pump housing with the driving source in a state that the pump housing is free from the vehicle frame. The input shaft is supported by the pump and is parallel to the output shaft of the driving source, and extends outwardly from a surface of the pump housing that faces the driving source and is inserted into the mounting housing. The PTO shaft is supported by the pump housing and is parallel to the input shaft and extends outwardly from a surface of the pump housing that is opposite to the surface that faces the driving source.

Pump unit and working vehicle

An axle driving apparatus for being mounted on the body frame of a vehicle and for independently rotating drive wheel members. The axle driving apparatus includes a first axle driving unit (L) having a housing () and a single axle (L), the single axle (L) defining a proximal end portion rotatably mounted in the housing () and a distal end portion extending outwardly from a first side of the housing (). An enlarged region is defined by the housing (), with the enlarged region extending substantially perpendicular to the longitudinal axis of the single axle (L). A hydraulic stepless speed change assembly () is disposed within the enlarged region. The speed change assembly () includes a hydraulic pump () having an input shaft () projecting from the enlarged region and includes a hydraulic motor () including an output shaft () drivingly connected to the single axle (L). The first axle driving unit (L) is used in conjunction with a second axle driving unit (R) which is adjacently disposed to the first axle driving unit (L) on the body frame of the vehicle and which is of substantially similar construction. However, the second axle driving unit (R) features a single axle (R) which extends outwardly from a second, opposite side of the housing () such that the axles (L,R) are oppositely disposed.

An axle driving apparatus in which a hydraulic pump and a hydraulic motor which constitute a hydrostatic transmission are disposed on a center section. In a horizontal portion of the center section are provided a pair of linear oil passages in parallel to each other. A pair of arcuate ports are provided on a pump mounting surface formed on the horizontal portion of the center section. The pair of arcuate ports are substantially perpendicular with respect to the direction in which the oil passages extend. The axis of slanting movement of a movable swash plate of the hydraulic pump extends laterally of the vehicle body on which the axle driving apparatus is provided. The rotating direction of an arm provided on a control shaft for slantingly operating the movable swash plate is coincident with the operating direction of a control rod connected with a speed changing member. Thus, the link mechanism for connecting the speed changing member and the control arm for the movable swash plate is simplified.

A hydraulic transaxle comprises a transaxle casing for supporting left and right axles, a pair of hydraulic motors disposed in the transaxle casing so as to drive the respective left and right axles, hydraulic ports provided in the transaxle casing so as to fluidly connect the pair of hydraulic motors in parallel to a common hydraulic pump, and a system for restricting or canceling differential rotation of the pair of hydraulic motors.

Hydraulic transaxle and vehicle comprising it

A hydraulic transmission comprises a hydraulic pump and a hydraulic motor, which are mounted onto a center section to be fluidly connected to each other through a closed fluid circuit formed in the center section. A neutral valve is connected to the closed fluid circuit. The neutral valve is fitted into an outward opened end of a vertical slanted oil hole of the closed fluid circuit. Alternatively, the neutral valve is fitted into an outward opened end of a straight oil hole having an opposite outward opened end into which a charge check valve is fitted.

Hyrdaulic transmission

There is provided a working vehicle having first and second hydraulic pump units operatively driven by a driving source and arranged away to each other in a width direction of the vehicle. In the working vehicle, each of the first and second hydraulic pump units includes a pump body; a port block formed with an oil passage for supplying/discharging an operating fluid to/from said pump body; a pump case connected to the port block so as to define a pump body accommodating space for surrounding the pump body; and a pump shaft for rotatably driving the pump body, the pump shaft having an input end operatively connected to said driving source. A drain port for opening the pump body accommodating space outward and a charge suction port for drawing in an oil from an oil tank in order to supply a charge oil to a hydraulic circuit fluidly connecting with the corresponding hydraulic motor unit are provided respectively in first and second assemblies formed by the corresponding pump case and port block. The drain port is provided on a wall surface other than an opposing wall surface facing each other of the wall surfaces of said first and second assemblies when arranging the first and second assemblies so that the input ends of each pump shaft are directed in the same direction.

Hydraulic pump unit, hydraulic pump set, and working vehicle

There is provided a multiple pump unit including a pump shaft, a first pump, a pump housing, a second pump and a fluid passage block connected to one end surface in an axis line direction of the pump housing. One or both contacting surfaces of the pump housing and the fluid passage block is formed with a concave portion for accommodating the second pump. The pump housing is provided with a suction fluid passage guiding hydraulic fluid to a suction opening of the first pump and a first pump discharge fluid passage having a distal end that forms a first pump discharge port. The fluid passage block is provided with a second pump discharge port having the second pump as a hydraulic source.

Multiple pump unit

A vehicle includes a first transaxle incorporating a first hydraulic motor for driving a first axle, a pair of second transaxles incorporating respective second hydraulic motors for driving respective second axles, and a pump housing separated from the first transaxle and the pair of second transaxles. The pump housing incorporates a hydraulic pump. The first hydraulic motor and the pair of second hydraulic motors are fluidly connected in series to the hydraulic pump. The second hydraulic motors are fluidly connected in parallel to the hydraulic pump.

Hydraulic drive vehicle

The present invention provides a pump unit including at least one hydraulic pump with inlet and outlet ports, a pump case for accommodating the hydraulic pump having an opening through which the hydraulic pump is insertable, and a lid, called a center section, closing the pump case. The center section forms a pair of inlet/outlet passages communicating an end with the inlet and outlet ports of the hydraulic pump and an end opening through a pump case abutting surface of the center section, and a first charging passage by which hydraulic fluid is fed through the pump case abutting surface of the center section. At least one of the pump case and the center section communicates the first charging passage with the pair of inlet/outlet passages via a first hydraulic fluid feeding valve preventing the reverse flow into said first charging passage.

Pump unit

There is provided a pump unit including plurality of hydraulic pump bodies respectively fluidly connected to plurality of hydraulic motor bodies, which are disposed away from the pump unit, so as to form closed circuits, the pump unit including: a housing accommodating the plurality of hydraulic pump bodies so that the plurality of hydraulic pump bodies are operatively driven by a common driving source; a charge pump body operatively driven by the driving source; a suction fluid passage fluidly connected to a suction side of the charge pump body; a discharge fluid passage fluidly connected to a discharge side of the charge pump body; a charge passage for replenishing a part of pressurized fluid in the discharge fluid passage into each of the closed circuits; and a working machine operating fluid passage for supplying a part of the pressurized fluid in the discharge fluid passage toward an external hydraulic actuator.

There is provided a pump unit configured to be capable of transmitting a rotational per from a driving power source which is operatively connected thereto to an actuator through a pair of hydraulic fluid lines. The pump unit includes: an input shaft; a hydraulic pump main body; a PTO shaft; a PTO clutch mechanism; and auxiliary pump main body; a suction line; a discharge line; a charge line; a PTO hydraulic fluid line; a pressure-reducing valve; and a resistance valve. The PTO hydraulic fluid line and the charge line are fluidly connected to the primary side and a secondary side of the pressure-reducing valve, respectively.

Pump unit and hydrostatic transmission

There is provided a pump unit including plurality of hydraulic pumps respectively fluidly connected to plurality of hydraulic motors, which are disposed away from the pump unit, so as to form closed circuits, the pump unit including a pump case accommodating the plurality of hydraulic pumps so that the plurality of hydraulic pumps are operatively driven by a common power source; and a filter mounted at the pump case so as to be inserted in a charge passage for replenishing operation fluid from a fluid sump to the closed circuits.

A power transmission system for a working vehicle comprises: a vehicle frame; a prime mover mounted on the vehicle frame; a pair of left and right drive wheels; a pair of left and right transaxles juxtaposed on the vehicle frame, wherein each of the left and right transaxles includes a single axle for individually driving each of the left and right drive wheels in forward and rearward directions; a working device; and a working power clutch unit disposed between the left and right transaxles so as to clutch on/off power transmitted from the prime mover to the working device. The working power clutch unit includes: a driving side rotary mechanism for receiving power from the prime mover; the driving side rotary mechanism having one or more first rotors interlocking with each other; a driven side rotary mechanism for outputting power to the working device, the driven side rotary mechanism having one or more second rotors interlocking with each other; and a hydraulic clutch drivingly interposed between the driving side rotary mechanism and the driven side rotary mechanism, and incorporated in the working power clutch unit.

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Amagasaki, Japan

Ryota Ohashi