Patent application number | Description | Published |
20080214348 | Working Vehicle Transmission System - A working vehicle transmission system comprises a PTO device for driving an external working device by power of a prime mover, and a multistage transmission for transmitting power from the prime mover to an axle. The multistage transmission includes a main speed-change mechanism and a sub speed-change mechanism. The main speed-change mechanism has plural drive trains for setting respective different speed stages. The sub speed-change mechanism is disposed downstream of the main speed-change mechanism and has plural drive trains for setting respective different speed stages. The main speed-change mechanism includes a first clutch and a second clutch. The main speed-change mechanism drive trains used for setting odd-numbered speed stages are activated by engaging the first clutch. On the other hand, the main speed-change mechanism drive trains used for setting even-numbered speed stages are activated by engaging the second clutch. During a speed-change operation of the main speed-change mechanism, an engagement action of one of the first and second clutches and a disengagement action of the other of the first and second clutches overlap each other. A reverser is disposed upstream of the first and second clutches of the main speed-change mechanism so as to enable switching the direction of output rotation transmitted to the first and second clutches from one direction to the opposite direction. | 09-04-2008 |
20080214356 | Speed Change System for Working Vehicle - A speed change system for a working vehicle comprises a main transmission, a sub transmission and a preliminary transmission. The main transmission receives a prime mover power outputted from a prime mover, and has plural main speed stages, one of which is selected to transmit the prime mover power. The sub transmission is disposed on the downstream of the main transmission, and has plural sub speed stages, one of which is selected to transmit a power from the main transmission. The preliminary transmission is disposed on the upstream of the main transmission, and has plural preliminary speed stages, one of which is selected to transmit the prime mover power to the main transmission. An operation for selecting one of the preliminary speed stages can be performed during traveling of the working vehicle. | 09-04-2008 |
20080251336 | Frame Structure of a Vehicle - 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. | 10-16-2008 |
20090025997 | Hydraulic Drive Vehicle with Cooling System - A hydraulic drive vehicle comprises a vehicle frame, a bonnet, a prime mover, a hydraulic transaxle, a seat, a reservoir tank, and a cooling fan and a cooling duct. The bonnet is supported on one of front and rear portions of the vehicle frame, and provided therein with a first space. The prime mover is disposed in the first space. The hydraulic transaxle is driven by the prime mover. The seat is supported on the other of the front and rear portions of the vehicle frame, and is provided therebelow with a second space. The reservoir tank is fluidly connected to the hydraulic transaxle. The cooling fan is driven by the prime mover. The cooling duct is disposed in the second space. The cooling fan and the reservoir tank are disposed in the cooling duct so that the cooling fan cools the reservoir tank. A hydraulic pump for driving the hydraulic transaxle is disposed in the cooling duct so as to be cooled by the cooling fan. | 01-29-2009 |
20090120710 | Vehicle Transmission System - A vehicle has an engine, an accelerator for controlling the rotary speed of the engine, an axle and a multi-speed transmission for transmitting power from the engine to the axle. The multi-speed transmission includes an odd-numbered speed drive train for an odd-numbered speed level, a first clutch for the odd-numbered speed drive train, an even-numbered speed drive train for an even-numbered speed level, and a second clutch for the even-numbered speed drive train. In correspondence to operation of the accelerator and an actual speed of the axle, either the odd-numbered speed drive train or the even-numbered speed drive train is selected so as to transmit power from the engine to the axle. A shift-up or shift-down timing between the odd-numbered speed level and the even-numbered speed level relative to variation of the actual speed of the axle is changed according to detection of a tilt angle of the vehicle or a weight of the vehicle. | 05-14-2009 |
20100006365 | Vehicle - A vehicle has an engine, an accelerator for controlling the rotary speed of the engine, an axle and a multi-speed transmission for transmitting power from the engine to the axle. The multi-speed transmission includes an odd-numbered speed drive train for an odd-numbered speed level, a first clutch for the odd-numbered speed drive train, an even-numbered speed drive train for an even-numbered speed level, and a second clutch for the even-numbered speed drive train. In correspondence to operation of the accelerator and an actual speed of the axle, either the odd-numbered speed drive train or the even-numbered speed drive train is selected so as to transmit power from the engine to the axle. A shift-up or shift-down timing between the odd-numbered speed level and the even-numbered speed level relative to variation of the actual speed of the axle is changed according to detection of a tilt angle of the vehicle or a weight of the vehicle. | 01-14-2010 |
20110039653 | Differential System - A power take-off support portion, including a shaft hole and an outer side surface formed around the shaft hole, is formed on a transaxle housing. The outer side surface of the power take-off support portion is shaped to fit a power take-off casing supporting a power take-off shaft in a first direction. A power take-off casing includes a power take-off main casing member and a base casing member joined to each other. The base casing member is formed with an inner side surface and an outer side surface. The inner side surface and the outer side surface of the base casing member are shaped so that the power take-off shaft supported by the power take-off main casing member is oriented in a second direction different from the first direction when the inner side surface of the base casing member is fitted to the outer side surface of the power take-off support portion, and the outer side surface of the base casing member is fitted to the inner side surface of the power take-off main casing member. | 02-17-2011 |