Kanzaki Kokyukoki Mfg. Co., Ltd.

Other

Yamakawa Sangyo Co., Ltd.

Iwaki, Koji

Manabu Kawakami

Shigenori Sakikawa

Ryota Ohashi

Masaru Iida

Fumitoshi Ishino

Norihiro Ishii

Koji Iwaki

Katsumoto Mizukawa

Takeaki Nozaki

Kentaro Nagata

Michio Tsukamoto

Yoshikatsu Nishida

An alumina-based filling sand for sliding nozzle comprising at least 50 wt % of mixed sand including 20 to 90 vol % of alumina sand and 80 to 10 vol % of silica sand, wherein the alumina sand has surface irregularities of 1.3 or less and comprises 50 wt % or more of an AlOcomponent.

Alumina-based filling sand for sliding nozzle

An axle driving apparatus includes a first housing having a plurality of cooling fins, an axle rotatably mounted in the first housing, a hydraulic stepless speed change assembly disposed within the first housing. The axle driving apparatus also includes a second housing having a plurality of cooling fins, an axle rotatably mounted in the second housing, a hydraulic stepless speed change assembly disposed within the second housing. A connecting means, such as a bar and/or plate connects the first and second housings. The plurality of cooling fins on the first housing has a different configuration that the plurality of cooling fins on the second housing.

Axle driving apparatus for a zero turn radius vehicle

A transaxle (), having a hydraulic drive unit () and a pair of left and right wheel support units (L andR), is suspended from a vehicle frame so as to be turnable around a turning-center axis oriented in a fore-and-aft direction of a vehicle. The hydraulic drive unit () comprises: a pair of left and right hydraulic motors (L andR) having respective left and right horizontal motor shafts (); a center section () formed therein with an oil passage for hydraulically connecting at least one of the hydraulic motors to a hydraulic pump, the center section having motor attachment surfaces onto which the hydraulic motors are attached; and a pair of left and right axle casings (L andR) containing the respective hydraulic motors and supporting the respective motor shafts. The pair of wheel support units (L andR), supporting respective left and right travel wheels (L andR), are joined to respective outer ends of the left and right axle casings, and drivingly connected to the respective motor shafts ().

Hydraulic transaxle

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

A working vehicle comprises: a vehicle frame; a prime mover mounted on an upper surface of a first portion of the vehicle frame; a pair of left and right transaxles juxtaposed below the vehicle frame, the left and right transaxles having respective single axles so as to individually and reversibly rotatably driving left and right drive wheels; a working device disposed below the vehicle frame; an output shaft of the prime mover extended downward from the first portion of the vehicle frame; a traveling belt transmission disposed below the vehicle frame and extended from the output shaft to the pair of left and right transaxles; a working belt transmission disposed below the vehicle frame and extended from the output shaft to the working device; a counter shaft for the traveling belt transmission extended downward from a second portion of the vehicle frame; and a pair of upper and lower pulleys provided on the counter shaft, wherein a belt looped over the lower pulley is extended from the output shaft of the prime mover, and a belt looped over the upper pulley is extended to the left and right transaxles.

Power transmission system and vehicle with it

There is provided an axial piston device that includes a housing, a rotary shaft, a cylinder block, and a piston. The housing includes a housing body opened at a first end thereof and a plate disposed at the first end of the housing body. The rotary shaft is rotatably supported about an axis by the housing body and the plate. The cylinder block is rotated together with the rotary shaft and is accommodated inside the housing. The piston is accommodated in the cylinder block in slidable a manner in an axial direction. Furthermore, the plate is provided with a pair of first oil passages having first ends communicating with a discharge port and a suction port of the cylinder block and second ends opened to the surface of the plate, and a drain oil passage for allowing at least one of the first oil passages to communicate with an oil sump. The drain oil passage is provided with a rotary valve which can selectively switch a shutoff position at which the drain oil passage is shut off and a communication position at which the drain oil passage is communicated.

Axial piston device

Hydraulic axle-drive device

A hydrostatic transmission, comprising a housing, an interior space of the housing serving as a fluid sump; a center section disposed in the housing so as to be submerged In the fluid sump; a hydraulic pump mounted on the center section in the housing: a hydraulic motor mounted on the center section in the housing, and a pair of first and second fluid passages formed within the center section so as to fluidly connect the hydraulic pump with the hydraulic motor. The second fluid passage has an upwardly slant opening toward the fluid sump. A draining device including a relief valve is provided in the opening of the second fluid passage. When hydraulic pressure in the second fluid passage is not more than a predetermined value but not less than that in the first fluid passage, the relief valve is opened so as to drain fluid from the second fluid passage to the fluid sump, thereby keeping the hydrostatic transmission in neutral. When hydraulic pressure in the second fluid passage is more than the predetermined value or less than that in the first fluid passage, the relief valve is closed so as to shut out fluid in the second fluid passage from the fluid sump. The draining device comprises a ball check valve which closes the relief valve by its dead weight when the hydraulic pressure in the second fluid passage is less than the first fluid passage.

Hydrostatic transmission

A hydraulic four-wheel driving apparatus is provided for a vehicle having a pair of left and right unsteerable wheels and a pair of left and right steerable wheels. The hydraulic four-wheel driving apparatus comprises: a transmission casing supporting the unsteerable wheels; a hydraulic pump disposed integrally with the transmission casing, the hydraulic pump being driven by a power source outside the transmission casing; a first hydraulic motor for driving the unsteerable wheels fluidly connected to the hydraulic pump, the first hydraulic motor being disposed integrally with the transmission casing; and a second hydraulic motor for driving the steerable wheels fluidly connected to the hydraulic pump, the second hydraulic motor being disposed integrally with the transmission casing and disposed on one side of the first hydraulic motor toward the steerable wheels.

Growing community of inventors

Amagasaki, Japan

Manabu Kawakami