Kanzaki Kokyukoki Mfg. Co., Ltd.

Other

Yoshitaka Ishimaru

Shigenori Sakikawa

Shusuke Nemoto

Kenichi Takada

Shinya Sakakura

Toshiyuki Hasegawa

Tomoyuki Ebihara

Hirohiko Kawada

Kazuhiko Ohtsuki

Atsuo Yoshina

Tomoyuki Tsuji

Toshio Tsuda

Naoki Yamakaji

Hiroyasu Nagata

Rei Maeda

Takatoshi Meno

A transmission mechanism and a pressure oil supply system therefor are provided for use in work vehicles provided with a work device externally of the body of the vehicle at longitudinal one side thereof, the transmission mechanism being simple in construction and serving to shorten the overall length of the vehicle while holding a transmission shaft interconnecting a PTO shaft and an input shaft for the work device close to a horizontal. A work vehicle provided with a work device in front of the vehicle body comprises a transmissiondisposed between a differential gear unitand an HSTand providing a travel cooperative mechanism, a PTO shaft projecting from the housing of the HST, and a PTO cooperative mechanism disposed in the housing for dividedly deriving power for the PTO shaft from the travel cooperative mechanism for the transmission of the power. The HSTcomprises a hydraulic pumphaving a pump shaftfor receiving an input at its rear end, and a hydraulic motorhaving a motor shaftfor delivering a front wheel driving force and a rear wheel driving force from the front end and rear end thereof, respectively.

Transmission mechanism for vehicles having HST and pressure oil supply system therefor

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 transmission mechanism and a pressure oil supply system therefor are provided for use in work vehicles provided with a work device externally of the body of the vehicle at longitudinal one side thereof, the transmission mechanism being simple in construction and serving to shorten the overall length of the vehicle while holding a transmission shaft interconnecting a PTO shaft and an input shaft for the work device close to a horizontal. A work vehicle provided with a work device in front of the vehicle body comprises a transmission disposed between a differential gear unit and an HST and providing a travel cooperative mechanism, a PTO shaft projecting from the housing of the HST, and a PTO cooperative mechanism disposed in the housing for dividedly deriving power for the PTO shaft from the travel cooperative mechanism for the transmission of the power. The HST comprises a hydraulic pump having a pump shaft for receiving an input at its rear end, and a hydraulic motor having a motor shaft for delivering a front wheel driving force and a rear wheel driving force from the front end and rear end thereof, respectively.

In a frame structure of a vehicle that includes a flywheel housing, an intermediate housing and a transmission case that are connected to each other along a longitudinal axis of the vehicle to constitute a vehicle frame, the intermediate housing has a hollow shape with a first end and a second end located along the longitudinal axis of the vehicle, the first end having an abutting surface against which the second end of the flywheel housing abuts, a support surface located radially inwardly of the abutting surface so as to support the forward/rearward movement switching unit, and an opening surrounded by the support surface, the opening serving as a first-end opening of the intermediate housing along the longitudinal axis of the vehicle. The abutting surface and the support surface along the longitudinal axis of the vehicle are located so that at least a portion of the forward/rearward movement switching unit is accommodated within the flywheel housing.

Frame structure of a vehicle

A hydrostatic transmission for vehicle interposed in a drive-power transmission path between a driving power source and a driving axle for non-stepwisely changing the speed of the vehicle includes an HST housing; a hydraulic pump unit having a pump shaft with first and second ends extending in a fore-aft direction of the vehicle away from each other; a hydraulic motor unit having a motor shaft for outputting the drive power from the motor shaft whose speed is non-stepwisely varied in cooperation with the hydraulic pump unit; a PTO unit having a PTO shaft extending in the fore-aft direction of the vehicle, the PTO shaft being operatively connected to the pump shaft; a charge pump unit for replenishing pressurized hydraulic fluid to a hydraulic circuit, the hydraulic circuit hydraulically connecting the hydraulic pump unit with the hydraulic motor unit, the charge pump unit including a charge pump body, and a charge pump case connected to the HST housing through its wall closer to the driving axle for supporting the charge pump body; the PTO shaft having an one end closer to the driving axle, the one end extending outwardly through the HST housing to have an outer extension positioned outside of the HST housing; and the charge pump case being designed so as to bearing-support the outer extension of the PTO shaft.

Hydrostatic transmission and power train for vehicle

A transmission mechanism and a pressure oil supply system therefor are provided for use in work vehicles provided with a work device externally of the body of the vehicle at longitudinal one side thereof, the transmission mechanism being simple in construction and serving to shorten the overall length of the vehicle while holding a transmission shaft interconnecting a PTO shaft and an input shaft for the work device close to a horizontal. A work vehicle provided with a work device in front of the vehicle body comprises a transmission disposed between a differential gear unit and an HST and providing a travel cooperative mechanism, a PTO shaft projecting from the housing of the HST , and a PTO cooperative mechanism disposed in the housing for dividedly deriving power for the PTO shaft from the travel cooperative mechanism for the transmission of the power. The HST comprises a hydraulic pump having a pump shaft for receiving an input at its rear end, and a hydraulic motor having a motor shaft for delivering a front wheel driving force and a rear wheel driving force from the front end and rear end thereof, respectively.

A transmission mechanism and a pressure oil supply system therefor are provided for use in work vehicles provided with a work device externally of the body of the vehicle at longitudinal one side thereof, the transmission mechanism being simple in construction and serving to shorten the overall length of the vehicle while holding a transmission shaft interconnecting a PTO shaft and an input shaft for the work device close to a horizontal. A work vehicle provided with a work device in front of the vehicle body comprises a transmission disposed between a differential gear unit and an HST and providing a travel cooperative mechanism, a PTO shaft projecting from the housing of the HST and a PTO cooperative mechanism disposed in the housing for dividedly deriving power for the PTO shaft from the travel cooperative mechanism for the transmission of the power. The HST comprises a hydraulic pump having a pump shaft for receiving an input at its rear end, and a hydraulic motor having a motor shaft for delivering a front wheel driving force and a rear wheel driving force from the front end and rear end thereof, respectively.

Transmission mechanism of vehicle with HST and pressure oil feeding device for the mechanism

The invention provides a transmission mechanism for use in a vehicle including a vehicle body having one side toward a first direction along the length thereof and the other side toward a second direction opposite to the first direction, the vehicle comprising a differential gear unit , an HST and an engine which are arranged in the vehicle body from the first direction side toward the second direction. A transmission is provided between the differential gear unit and the HST , whereby the power of the engine is transmitted through the transmission and input to the HST at the first direction side thereof. The transmission mechanism of simple construction serves to shorten the overall length of the vehicle while preventing the rise of the center of gravity of the vehicle.

Transmission mechanism of vehicle with HST

A frame is disposed between an engine and a transmission casing and is made of three sheet metal parts; an engine mounting part, a transmitting shaft covering part and a transmission casing mounting part. The transmitting shaft covering part consists of two laterally or vertically separable halves which join each other to form a barrel. One end of each half is fixed to the engine mounting part, while the other end is fixed to the transmission casing mounting part. Reinforcing members are disposed below a transmitting shaft housed in the transmitting shaft covering part. An expanded portion is disposed at the other end of the transmitting shaft covering part. An opening edge of the expanded portion is fixed to the transmission casing mounting part.

Frame structure of a working vehicle

A transmission casing, comprising a front casing and a rear casing, houses a transmission, comprising an input shaft whereto power is transmitted from an engine; a pair of axles whereto left and right running wheels of a vehicle are affixed; a running speed changing unit interlocking the pair of axles and the input shaft; a mid-PTO shaft to drive a working machine attached to a belly portion of the working vehicle; and a mid-PTO drive train interlocking the mid-PTO shaft and the input shaft. A PTO clutch mechanism is provided around a PTO transmission shaft so as to provide a condition where only the mid-PTO shaft is driven, a condition where only the rear-PTO shaft is driven, a condition where both PTO shafts are driven and a neutral condition where neither PTO shaft is driven. A brake unit is provided in the mid-PTO drive train to stop the mid-PTO shaft.

Growing community of inventors

Osaka, Japan

Yoshitaka Ishimaru