Kanzaki Kokyukoki Mfg. Co., Ltd.

Other

Tuff Torq Corporation

Kanzaki Kokyukoki Mgf. Co., Ltd.

Hideaki Okada

Ryota Ohashi

Robert Abend

Shusuke Nemoto

Norihiro Ishii

Michio Tsukamoto

Koji Irikura

Masaru Iida

Hironori Sumomozawa

Toshiro Azuma

Kojiro Yamaoka

Kenji Shiba

Shinichi Hirose

Toshio Nagai

Koji Iwaki

Hiroshi Sugimoto

Fumitoshi Ishino

Koichiro Fujisaki

Hidemi Harada

Shiro Ueno

Hiroaki Shimizu

Toshiyuki Hasegawa

Hirohiko Kawada

Katsumoto Mizukawa

Krista Winfree

Norihiro Ishil

A hydraulic driving vehicle comprises front and rear transaxles incorporating respective hydraulic motors, and a pump unit separated from the front and rear transaxles. The pump unit incorporates a hydraulic pump having a pump shaft. A hydraulic circuit is formed by piping between the pump unit and the front and rear transaxles so as to circulate hydraulic fluid between the hydraulic pump and the hydraulic motors. A reservoir tank of the hydraulic fluid is connected to the hydraulic circuit by piping. A first cooling fan blowing air away from the pump unit and a second cooling fan blowing air toward the pump unit are disposed oppositely to each other with respect to the pump unit and drivingly connected to the pump shaft. At least a pipe for the piping of the hydraulic circuit and the reservoir tank passes an area blown by each of the first and second cooling fans.

Hydraulic drive vehicle

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.

In a hydraulic four-wheel drive vehicle, a rear transaxle incorporates a hydraulic motor for driving rear wheels, a front transaxle incorporates a hydraulic motor for driving front wheels, and hydraulic pressure fluid pipes interposed between the front and rear transaxles are extended along at least one of left and right side plates of a frame of the vehicle.

Hydraulically driven working vehicle and hydraulic transaxle

An axle driving system which houses in a housing thereof a hydrostatic transmission, axles, and a driving gear train for connecting output means of the hydraulic transmission and axles, so as to transmit power from a driving source to the hydrostatic transmission and to change the speed, thereby driving the axles. A first chamber therein contains the hydrostatic transmission and a second chamber therein contains the driving gear train. Both the first and second chambers are independent of each other so as to prevent a foreign object, such as iron powder produced in the driving gear train, from entering the hydrostatic transmission. The system includes an L-like-shaped center section on which the hydrostatic transmission is offset such that an imaginary plane which includes a motor mounting surface passes in proximity to the axis of a pump shaft. The pump shaft is disposed perpendicular to the axles. The motor shaft is disposed in parallel thereto. A hydraulic pump is positioned between the hydraulic motor and the axles, so that the housing for the hydrostatic transmission, axles and driving gear train, is smaller in width to thereby make the system more compact.

Axle driving system

An articulated vehicle with a working device has a first frame having a prime mover mounted thereon and supporting a first transaxle apparatus. The first transaxle apparatus includes an input shaft receiving power from the prime mover, a pair of first axles, and a hydrostatic transmission. The hydrostatic transmission comprises a variable hydraulic pump, a first hydraulic motor fluidly connected to the hydraulic pump via a fluid passage, and a housing with a flexible port fluidly connected to the fluid passage. The second transaxle apparatus includes a pair of second axles having different lengths and a second hydraulic motor. The second hydraulic motor is fluidly connected via piping to a directionally adjustable connection portion of the flexible port. Proximal ends of the first and second frames with respect to the vehicle are coupled to each other so that the first and second frames are rotatable around a vertical axis relative to each other when steered.

Hydraulic transaxle apparatus for a four-wheel-drive vehicle and four-wheel-drive vehicle using the apparatus

A hydraulic transaxle comprises: an axle; a hydraulic pump driven by a prime mover; a hydraulic motor fluidly connected to the hydraulic pump so as to drive the axle; a bypass fluid circuit bypassing between suction and delivery ports of the hydraulic motor; a bypass valve provided in the bypass fluid circuit; a bypass operation device for selectively opening or closing the bypass valve; and a reset mechanism for closing the opened bypass valve.

Hydraulic transaxle and hydraulically driven vehicle

A transaxle apparatus comprises: a housing; a hydrostatic transmission disposed in the housing, the hydrostatic transmission including a hydraulic pump receiving power from a prime mover, a first hydraulic motor driven in response to fluid supplied from the hydraulic pump, and a center section including an inner fluid passage for fluidly connecting the first hydraulic motor to the hydraulic pump; a first axle disposed in the housing and driven by the first hydraulic motor; a hydraulic actuator disposed outside the housing so as to drive a second axle disposed outside the housing; a port opened outside the housing so as to be fluidly connected to the hydraulic actuator; and a block interposed between the center section and the port in the housing, wherein a fluid passage is disposed in the block so as to connect the port to the inner fluid passage in the center section.

Hydraulic transaxle apparatus with flexible ports

A hydraulic transaxle including: a variable displacement hydraulic motor with a movable swash plate whose tilt angle defines a displacement of the hydraulic motor; a casing incorporating the hydraulic motor; and a mechanism for determining a range of the tilt angle of the swash plate, wherein the mechanism can fix the tilt angle of the swash plate so as to set the hydraulic motor in a fixed displacement type. A vehicle includes the transaxles for driving respective axles wherein each of the transaxles can select whether the displacement of its hydraulic motor is variable or fixed.

Hydraulic transaxle and vehicle comprising it

A transaxle comprising a transmission, a pair of coaxial axles, a deceleration assembly for decreasing output rotational speed of the transmission, a differential assembly for transmitting power from the deceleration assembly to the pair of axles, and a common housing incorporating the transmission. The differential assembly includes a pair of gear train units disposed on the respective axles, and a bull gear for receiving output rotation of the deceleration assembly. Each of the gear train units includes a sun gear fixed on each of the axles, a holder relatively rotatably provided on each of the axles, and a planetary gear supported by the holder to mesh with the sun gear. The holders of the pair of gear train units are symmetrical with respect to a surface perpendicular to the pair of axles and joined to each other through the surface, and integrally fitted together in the bull common gear.

Differential assembly and transaxle including it

An articulate vehicle comprises a first frame disposed at one of front and rear portions of the vehicle and a second frame disposed at the other of front and rear portions of the vehicle. The first frame supports a first transaxle apparatus supporting a first axle. The second frame supports a second transaxle apparatus supporting a second axle. Proximal ends of the frames with respect to the vehicle are coupled to each other through a coupling part so that the first and second frames are rotatable relative to each other around a vertical axis according to steering operation. An engine is mounted on the first frame. A first hydraulic motor is integrally assembled in the first transaxle apparatus so as to drive the first axle. A working vehicle is equipped at a distal side of the second frame with respect to the vehicle. A second hydraulic motor is integrally assembled in the second transaxle apparatus so as to drive the second axle. A hydraulic pump is mounted on either the first or second frame, drivingly connected to the engine, and fluidly connected to both the first and second hydraulic motors.

Growing community of inventors

Hyogo, Japan

Hideaki Okada