Honda Giken Kogyo Kabushiki Kaisha

Sadanori Nishimura

Yoji Yamada

Yuji Kishizawa

Masakazu Maezono

Tomoaki Ishikawa

Noboru Sekine

Keiichi Ishikawa

Hiroyuki Shimada

Yukio Kato

Masaru Yamashita

Hiroshige Makita

Kichiji Misawa

Takeyuki Shimizu

Masae Takamizawa

Eiichiro Kawahara

Takanori Suzuki

Satoru Kudo

Masahide Shinokawa

Katsuharu Kinoshita

Hideyuki Akaba

Isamu Goto

Makiro Ishimoto

Makoto Ninomiya

Atsuyoshi Kawai

Horishige Makita

A hydraulically operated power transmission apparatus transmits the output power from a power source at a selected speed ratio. The power transmission apparatus includes a casing having an opening in one end thereof, a base plate attached to the end of the casing in covering relation to the opening, the casing and the base plate jointly serving as a transmission case defining a closed space therein, a hydraulic pump having a pump drive shaft adapted to be operatively coupled to the power source, the hydraulic pump being disposed in the closed space, a hydraulic motor having a motor output shaft and drivable by a hydraulic pressure generated by the hydraulic pump, the hydraulic motor being disposed in the closed space, a pair of output shafts extending through the casing and the base plate, respectively, and disposed coaxially with each other, a differential mechanism disposed in the closed space and operable by the motor output shaft, the differential mechanism being coupled to the output shafts. The hydraulic pump, the hydraulic motor, and the differential mechanism are mounted on the base plate. The pump drive shaft, the motor output shaft, and the differential mechanism have ends rotatably supported by the base plate and opposite ends rotatably supported by the casing.

Hydraulically operated power transmission apparatus

A continuously variable hydraulic transmission operatively interconnects a transmission mechanism and a clutch mechanism. The hydraulic transmission includes an oil pump having an inlet port and an outlet port and a transmission ratio control member such as a swash plate which is displaceable for varying the transmission ratio between a higher-speed position, a lower-speed position, and a neutral position, an oil motor having an inlet port and an outlet port and drivable by the oil pump, a first oil passage hydraulically interconnecting the outlet port of the oil pump and the inlet port of the oil motor, a second oil passage hydraulically interconnecting the inlet port of the oil pump and the outlet port of the oil motor, a housing accommodating the oil pump, the oil motor, the first oil passage, and the second oil passage, and an oil passage control unit for selectively bringing the first oil passage into and out of hydraulic communication with the second oil passage. The oil passage control unit is fully accommodated in the housing and actuatable by the transmission ratio control member to bring the first and second oil passages into hydraulic communication with each other only when the transmission ratio control member is near the neutral position.

Hydraulic transmission for motor vehicle

A hydraulic power transmission apparatus for reducing the speed of rotation of output from a power source and changing the speed of rotation thereof at a given transmission ratio, includes an oil pump having a drive shaft to which the power from the power source can be applied, the oil pump being drivable by the power from the power source, a pair of oil motors having output shafts, respectively, and associated with a pair of axles, respectively, the oil motors being drivable by hydraulic pressure generated by the oil pump, a pair of speed reducer mechanisms disposed between the outupt shafts of the oil motors and the axles for reducing the speeds of rotation of the output shafts, respectively, and transmitting the rotation of the output shafts to the axles, respectively, an inner case having a closed space defined therein, the oil pump and the oil motors being housing in the closed space, and a transmission case having a transmission chamber defined therein, the inner case and the speed reducer mechanisms being housed in the transmission case, the transmission case storing oil therein.

Hydraulic power transmission apparatus

A hydraulic transmission apparatus comprises an input unit to which power from a power source is applied in a first direction, a direction changing unit hydraulically coupled to the input unit for extracting power in a second direction which is different from the first direction, and a case supporting the input unit and the direction changing unit. The input unit and the direction changing unit comprise an oil pump and an oil motor mounted respectively on one surface and another surface of the case. The case is filled with working oil for operating the oil pump and the oil motor. An operating device for a lawn mower has a first power transmitting path for transmitting power from the power source to a drive wheel, the first power transmitting path having a hydraulic transmission apparatus and a first clutch for selectively rotating and stopping the drive wheel, and a second power transmitting path for transmitting power from the power source to a grass cutter, the second power transmitting path including a second clutch for selectively rotating and stopping the grass cutter. The first clutch is independently operable. The second clutch has a mechanism for inactivating the first clutch in unison therewith when the second clutch is inactivated.

Hydraulic transmission apparatus

A power transmission device for a tractor in which a main shifting device and a secondary shifting device are disposed in front and back of one another within a transmission case which is mounted on a rear part of the tractor body is disclosed. Drive power, which is transmitted from an engine, is changed in speed by the main shifting device and secondary shifting device and then transmitted to an axle through a differential shaft. The differential shaft is disposed between the main shifting device and secondary shifting device. A lower link for connecting a piece of agricultural machinery is pivotably connected to the transmission case on the side of the secondary shifting device and behind the differential shaft. Various shafts within the transmission case are arranged on two different vertical level above and below the differential shaft, which extends at right angles with respect to these shafts. The differential shaft is connected to the axle through a reduction gear apparatus which has a counter-shaft. Furthermore, a brake device for braking the differential shaft is provided.

Power transmission device for a tractor

An inertia lock type synchronous clutch mechanism wherein a shifting sleeve is splined to a clutch hub and has circumferentially spaced cam portions on each axial side for engaging axially convex portions of an elastic ring on each side which convex portions fit within circumferentially spaced notches formed in the rim of the clutch. The convex portions of the elastic ring engage a blocking ring to cause frictional engagement with the selected gear and synchronize the rotation of that gear and the clutch hub for smooth engagement between the shifting sleeve and that gear.

Inertia lock type synchronous clutch mechanism

A compact transmission apparatus for a vehicle of the type wherein an input shaft and an output shaft are provided in parallel in a casing with the shaft supported at a middle wall and the front wall of the casing. Various speed driving trains are provided in the order from front to rear of third speed, second speed, fourth speed, reverse and first speed. The second speed driving train utilizes a front clutch mechanism of a double-type clutch, while the fourth speed driving train uses the rear clutch mechanism of the double-type clutch. The driving gear of the reverse driving train is made integral with the driving gear of the fourth speed driving train. A selection mechanism is provided between the driven gears of the reverse driving train and the fourth speed driving train to select for forward, highest speed movement or reverse movement.

Compact transmission apparatus for a vehicle

A hydraulic system for raising and lowering a working machine in a working vehicle such as agricultural tractors, which comprises a hydraulic cylinder, a hydraulic pump, an oil tank, a manual valve shiftable between three positions: a stationary position in which a working oil discharged from said hydraulic pump is released into the oil tank; a raised position in which the working oil is supplied into the hydraulic cylinder; and a lowered position in which the working oil supplied into the hydraulic cylinder is passed back into the oil tank, and a check valve for permitting only a flow of the working oil from the manual valve toward the hydraulic cylinder.

Hydraulic system for working vehicles

A power transmission device for use in a motor vehicle in which an engine is mounted on the front part and a transmission case is mounted on the rear part of the vehicle. A plurality of shifting shafts are axially supported within the transmission case in parallel with one another. Between these shift shafts, a plurality of shifting gear trains, which are engaged and disengaged by a hydraulic clutch, are provided. One of the shifting shafts is connected to the output side of a wet multi-disc main clutch which is disposed in a separate chamber within the transmission case. The input side of the clutch is connected to the engine. An oil pump is disposed within the transmission case. Oil discharged from the pump is controlled by a control valve and is then supplied to the respective oil clutches and bearings through an oil passage disposed along the wall of the transmission case and an oil passage disposed in the axial direction within the shifing shaft. The engine power, which is changed in speed, is transmitted to the front wheels through a front wheel drive shaft and also transmitted to an agricultural machinery through a PTO shaft.

Power transmission device

A clutch for equipment which is powered by an internal combustion engine, comprising a drive member which is connected to an output shaft of the engine, a driven member connected to an input shaft of a power transmission device, a number of clutch plates which are interposed between the drive member and the driven member for frictional engagement between the two members by a pressure member which is axially moveable and is biased by a spring, a lifter member for disengagement of the two members against the biasing force acting on the pressure member, and a brake device for stopping the motion of the driven member when the power transmission between the two members is disconnected. The brake device comprises a friction plate which is provided coaxially to the input shaft of the transmission device so as to be moveable along the axial direction but fixed along the circumferential direction and a brake plate which can press the friction plate against an axial end surface of the driven member in cooperation with the axial motion of the pressure member. Since the braking action of the brake device is produced by the axial motion of the lifter member, the structure for the brake device is extremely simplified.

Clutch with reduced dragging

A controller for the hydraulic clutch of two speed auxiliary transmission connected in series with the main transmission and engine of a vehicle wherein the hydraulic clutch is applied for the higher speed drive and released for the lower speed drive which is through a one-way clutch that overruns in the higher speed drive operation. The controller is responsive to engine throttle opening to apply the hydraulic clutch for throttle openings below a predetermined amount to allow braking of the vehicle by the engine during deceleration rather than coasting by the overrunning of the one-way clutch.

Controller for vehicle transmission with auxiliary transmission

A vehicular transmission in which a multiple speed manual transmission of the two parallel shaft type has an auxiliary transmission connected in series between the two shafts for some of the multiple speeds. The auxiliary transmission providing a high speed and a low speed. The auxiliary transmission includes gearing for providing the high or low speeds to the gears on one of the shafts. A hydraulic clutch and a one-way clutch in said auxiliary transmission selectively connect the high or low speed gearing, with the one-way clutch engaging when the hydraulic clutch is disengaged and being overrun when the hydraulic clutch is engaged.

Manual with auxiliary transmission

The present invention is directed to a damper device for a torque converter. The torque converter comprises a casing, a turbine, a pump and a stator, an input shaft coupled to the pump through the casing, an output shaft coupled to the turbine a clutch plate slidably mounted on the turbine for frictional engagement with the casing, and a plurality of circumferentially extending springs for coupling the clutch plate to the turbine. The damper device comprises a support on the clutch plate for contacting the longitudinal surface of each of the springs and holdind the springs, the springs directly abutting the side surface of the clutch plate. End surface supporting members are coupled to the clutch plate for supporting the ends of each of the springs, the end surface supporting members being positioned in spaces between adjacent springs. Torque transmission members are mounted on the turbine and extend therefrom into the end surface support members, the torque transmission members engaging the end surface of the springs for transferring the rotation of the turbine to the springs and thereby to the clutch plate, wherein the fluctuations in torque between the turbine and clutch plate are dampened by the springs.

Damper device of a clutch for a torque converter

A vehicle transmission having an auxiliary transmission with high and low speeds connected in series with a multi-speed manual transmission and clutch to an engine wherein the auxiliary transmission normally is shifted in response to the throttle opening of the engine and the vehicle speed. A control device detects the actuation of the clutch to maintain the auxiliary transmission in the low speed for a predetermined period after such clutch actuation to improve the vehicle operation.

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Saitama, Japan

Sadanori Nishimura