摘要:
A transmission system for transmitting power through a traveling transmission line and also through a PTO transmission line is disclosed. The system includes a clutch housing and a base transmission case connected via a housing frame. The base transmission case includes a front end opening and a rear end opening. A differential case is connected to the rear end opening. The front end opening is selectively connected with either a gear change speed case having a gear change speed mechanism or an HST case having an HST mechanism. When the gear change speed mechanism is selectively used, a PTO power output portion communicates with the PTO transmission line and a traveling power output portion communicates with the traveling transmission line. When the HST mechanism is selectively used, a pump shaft communicates with the PTO transmission line and a motor shaft communicates with the traveling transmission line.
摘要:
A transmission system for a tractor, adapted for transmitting power of an engine to axles through a traveling transmission line and also to an externally mounted utility implement through a PTO transmission line. The system includes a clutch housing disposed rearwardly of the engine, a base transmission case disposed and spaced rearwardly of the clutch housing, the clutch housing and the base transmission case being connected together via a housing frame. The base transmission case includes an intermediate partitioning wall for partitioning an inner space of the case in a fore and aft direction to create a front space having a front end opening and a rear space having a rear end opening. A differential case is connected to the rear end opening of the base transmission case. The front space includes a receiving portion for the traveling transmission line and a receiving portion for the PTO transmission line, the traveling and PTO transmission lines being disposed parallel with each other. The front end opening is selectively connected with either a gear change speed case having a gear change speed mechanism for changing speed of the engine power and outputting the speed-changed power or an HST case having an HST mechanism for changing speed of the engine power and outputting the speed-changed power. When the gear change speed mechanism is selectively used, a PTO power output portion of the gear change speed mechanism is connected end-to-end to the receiving portion for the PTO transmission line and a traveling power output portion of the gear change speed mechanism is connected end-to-end to the receiving portion for the traveling transmission line. When the HST mechanism is selectively used, a pump shaft of the HST mechanism is connected end-to-end to the receiving portion for the PTO transmission line and a motor shaft of the HST mechanism is connected end-to-end to the receiving portion for the traveling transmission line.
摘要:
A PTO clutch for a work vehicle and an operating structure for the PTO clutch includes: a PTO clutch having a clutch member and receiving drive power from an engine; a clutch control mechanically coupled to the clutch member for manually operating the PTO clutch via the clutch member; a PTO brake disposed downstream of the PTO clutch with respect to a direction in which power is transmitted, the PTO brake being movable to a braking position in association with a clutch disengaging operation of the clutch member; and a control retaining device for retaining the clutch control at a clutch disengaging position.
摘要:
A PTO clutch for a work vehicle and an operating structure for the PTO clutch includes: a PTO clutch having a clutch member and receiving drive power from an engine; a clutch control mechanically coupled to the clutch member for manually operating the PTO clutch via the clutch member; a PTO brake disposed downstream of the PTO clutch with respect to a direction in which power is transmitted, the PTO brake being movable to a braking position in association with a clutch disengaging operation of the clutch member; and a control retaining device for retaining the clutch control at a clutch disengaging position.
摘要:
A tractor with a PTO apparatus, comprises: a plurality of wheels; a vehicle body supported by the plurality of wheels; an engine supported on the vehicle body; a rear PTO shaft disposed at a rear of the vehicle body for transmitting power from the engine; a mid-PTO shaft disposed under the vehicle body for transmitting power from the engine; a PTO mode selecting device having a first position for transmitting power only to the rear PTO shaft, a second position for transmitting power to both the rear PTO shaft and said mid-PTO shaft, and a third position for transmitting power only to said mid-PTO shaft; a PTO clutch disposed on a transmission line upstream of said PTO mode selecting device and switchable between an engaged position and a disengaged position; and a restricting mechanism for preventing a change operation of said PTO mode selecting device when said PTO clutch is in the engaged position, and permitting the change operation of said PTO mode selecting device when said PTO clutch is in the disengaged position.
摘要:
A tractor with a PTO apparatus, comprises: a plurality of wheels; a vehicle body supported by the plurality of wheels; an engine supported on the vehicle body; a rear PTO shaft disposed at a rear of the vehicle body for transmitting power from the engine; a mid-PTO shaft disposed under the vehicle body for transmitting power from the engine; a PTO mode selecting device having a first position for transmitting power only to the rear PTO shaft, a second position for transmitting power to both the rear PTO shaft and said mid-PTO shaft, and a third position for transmitting power only to said mid-PTO shaft; a PTO clutch disposed on a transmission line upstream of said PTO mode selecting device and switchable between an engaged position and a disengaged position; and a restricting mechanism for preventing a change operation of said PTO mode selecting device when said PTO clutch is in the engaged position, and permitting the change operation of said PTO mode selecting device when said PTO clutch is in the disengaged position.
摘要:
An operator presence sensing apparatus for a seat of a vehicle includes a base member (7, 8) for supporting the seat (6), and a relay member (9) extending vertically between the base member and the seat. The seat is oscillatable about a pivot axis (X) extending in a transverse direction in the base member. The relay member is pivotably supported at one end thereof by the pivot axis and at the other end by the base member through a cushion spring (10). A seat lift-up spring (12) is disposed between an underside of the seat and the base member for receiving part of the weight of the seat. The seat unoccupied by the operator is oscillated to a floating position lifted from the relay member by the lift-up spring. The apparatus further comprises an operator presence sensing switch (13) for detecting the seat occupied by the operator and oscillated from the floating position to a lower seated position, and a restricting device (14, 15a) for restricting the relay member oscillating upward by action of the cushion spring when the seat is not occupied by the operator.
摘要:
A speed control system for a working vehicle having a stepless change speed device and an auxiliary change speed device. The speed control system comprises a speed governor for controlling rotational rate of an engine, and an accelerator lever for operating the speed governor. The speed governor is interlocked with the stepless change speed device such that the rotational rate of the engine is increased with an accelerating operation of the stepless change speed device, and is decreased with a decelerating operation of the stepless change speed device. An interlock breaker is provided for breaking the interlocking between the speed governor and stepless change speed device when the auxiliary change speed device is in a low speed state.
摘要:
A work vehicle operable in a rearward facing position using a simple construction is disclosed. The work vehicle includes a hydrostatic stepless change speed device for transmitting power from an engine to a traveling device, a change speed pedal mechanism operable in a forward facing position for changing speeds in the hydrostatic stepless change speed device, and a travel-control lever provided at a rear position of a vehicle body and operable in the rearward facing position. The travel-control lever and the change speed pedal mechanism are linked to each other through a mechanical interlocking mechanism so as to control the hydrostatic stepless change speed device by the travel-control lever through the change speed pedal mechanism.
摘要:
A vibration and sound proofing system for a working vehicle such as a tractor or a lawn mower having a hydrostatic stepless transmission (HST) included in a propelling transmission system for transmitting engine output to wheels. The HST is mounted in a case secured to intermediate mounting plates attached to a gear transmission case through vibration and sound absorbers. Output shafts of the HST are connected to input shafts of a gear transmission through vibration absorbing shaft couplings.Each of the vibration absorbers includes a metallic outer tube, a metallic inner tube disposed concentrically with the outer tube, and a rubber element filled tight in an annular space defined between the outer and inner tubes. The intermediate mounting plates are connected to the transmission case with the outer tubes inserted into bores defined in the intermediate mounting plates, by tightening bolts extending through the inner tubes and through spacers interposed between the inner tubes and the transmission case, respectively.