摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A damper device for a torque converter clutch to allow slipping of the clutch under low torque transmitting conditions to absorb objectionable torque fluctuations. A fluid communication port in the clutch plate is exposed or covered to control the pressure differential across the clutch plate which operates the clutch. A valve member is connected to the turbine vane wheel on the output side of the torque converter to expose or cover the hole as the torque being transmitted is reduced or increased, respectively. In one form the valve member is mounted on the turbine vane wheel while in another form it is mounted on the clutch plate.
摘要:
A control system for the clutch of a torque converter to allow direct drive operation of the torque converter in more than one transmission drive train speed level. The fluid pressure normally causing coupling of the clutch is interrupted by a blocking device when a change in drive trains occurs resulting in a lower fluid pressure on one of the drive train operating clutches, and that interruption is prolonged by delaying either the imposition of the high fluid pressure on the blocking device in one embodiment or the imposition of the fluid pressure on the clutch in another embodiment.
摘要:
A control apparatus for a vehicle transmission is provided which has at least two transmission trains, which includes a high speed transmission train and a low speed transmission train. The low speed transmission train includes a one-way clutch. Each of the transmission trains have a clutch therein. The control apparatus comprises a hydraulic circuit coupled to the clutch and a creep-preventer which is coupled to the hydraulic circuit for operating in response to the idling of the vehicle engine when the vehicle is stopped, and to make the one-way clutch inoperative to prevent transmission of power through the low speed transmission when the clutch of the high speed transmission is engaged, to thereby permit operation of the clutch of the low speed transmission train without the transmission of power therethrough.
摘要:
An operation oil supply apparatus in oil pressure operated type transmission of such an arrangement that there are contained, in a transmission casing, high speed and low speed driving trains having therein high speed and low speed oil pressure clutches mounted on a pair of rotary shafts, and a valve block having a manual valve and a shift valve, and the manual valve has a 1st forward running range in which oil supply is given selectively to any of the oil pressure clutches and a 2nd forward running range in which oil supply to the high speed oil pressure clutch is cutoff and oil supply is given to the low speed oil pressure clutch. The high speed oil pressure clutch is arranged to be given oil supply by such an arrangement that an oil supply pipe projecting from the transmission casing is inserted in a center opening made in the rotary shaft supporting the clutch. The low speed oil pressure clutch is arranged to be given oil supply through an oil supply opening made in an extension which surrounds the rotary shaft supporting the clutch and projects from the valve block towards the clutch side.
摘要:
The present invention discloses a control apparatus for an oil pressure operated transmission in an automotive vehicle. The apparatus comprises a transmission with at least two stages of low speed and high speed forward driving trains and it is so arranged that, in an automatic shift range of a manual valve connected through first oil passage to an oil pressure source, low speed and high speed oil pressure clutches are selectively supplied with pressure oil through a shift valve in communication with the manual valve through a second oil passage. In a hold range of the manual valve, the valve is interposed between the low speed oil pressure clutch and the shift valve means for dividing the oil passage into third oil passage on its upstream side and fourth oil passage on its downstream side, having no communication between third and fourth passage and establishing a communication between fourth and first oil passage without through the shift valve means. At the same time the communication between first and second oil passage is disrupted.
摘要:
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.