Abstract: An operating device with an operating lever for a control valve includes: an input member connected to the operating lever; an output member connected to a slide spool of the control valve; and a swing link for relaying a displacement of the input member to the output member. The swing link is swingable about a swing shaft center on one end and is connected to the input and output members. A latch portion in the swing link is farther than a connecting point with the output member from the swing shaft center. A lock body is switchably operable between a lock position and a release position, and at the lock position, engaged with the latch portion at a neutral position to limit a swing of the swing link about the swing shaft center by which the control valve is locked at a neutral state.

Abstract: A vibration-isolating device for a steering wheel of a travelling working vehicle equipped with a wheel steering mechanism includes a first steering shaft (32) that transmits rotational displacement, the first steering shaft being operatively connected to the steering wheel (7); a second steering shaft (33) that transmits rotational displacement, the second steering shaft being operatively connected to the wheel steering mechanism (P, 23); and a vibration-isolating connecting mechanism (31) that operatively connects the first steering shaft (32) and the second steering shaft (33) to each other so that rotational displacement can be transmitted. When the angles of rotational displacement of the first steering shaft (32) and the second steering shaft (33) are within ranges of rotation angles for linearly driving the vehicle, rotational displacement cannot be transmitted between the first steering shaft (32) and the second steering shaft (33).

Abstract: 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.

Abstract: An operating device with an operating lever for a control valve includes: an input member connected to the operating lever; an output member connected to a slide spool of the control valve; and a swing link for relaying a displacement of the input member to the output member. The swing link is swingable about a swing shaft center on one end and is connected to the input and output members. A latch portion in the swing link is farther than a connecting point with the output member from the swing shaft center. A lock body is switchably operable between a lock position and a release position, and at the lock position, engaged with the latch portion at a neutral position to limit a swing of the swing link about the swing shaft center by which the control valve is locked at a neutral state.

Abstract: A vibration-isolating device for a steering wheel of a travelling working vehicle equipped with a wheel steering mechanism includes a first steering shaft (32) that transmits rotational displacement, the first steering shaft being operatively connected to the steering wheel (7); a second steering shaft (33) that transmits rotational displacement, the second steering shaft being operatively connected to the wheel steering mechanism (P, 23); and a vibration-isolating connecting mechanism (31) that operatively connects the first steering shaft (32) and the second steering shaft (33) to each other so that rotational displacement can be transmitted. When the angles of rotational displacement of the first steering shaft (32) and the second steering shaft (33) are within ranges of rotation angles for linearly driving the vehicle, rotational displacement cannot be transmitted between the first steering shaft (32) and the second steering shaft (33).

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A shift control system includes a shift pedal (13), a first linkage mechanism (16, 18, 19, 20) for transmitting a downward displacement of the shift pedal to the stepless transmission to change a shift position of the stepless transmission, a retaining mechanism (30, 40, 41, 42) for producing a retaining position corresponding to the shift position to retain the shift position of the stepless transmission, and a shift lever (26) for setting the retaining position retained by the retaining mechanism. A second linkage mechanism (34, 35, 36) is provided for transmitting of an operating displacement of the shift lever to the shift pedal to displace the shift pedal to a depressed position corresponding to the retaining position set by the shift lever and retained by the retaining mechanism. The shift lever, retaining mechanism and second linkage mechanism are attachable and detachable independently of the first linkage mechanism.

Abstract: The present invention relates to a device for reversibly supporting the seat of a vehicle. When a tractor or like vehicle is used for working with a backhoe or like work machine attached to the rear end of the vehicle, a forward operation seat and a rearward operation seat are conventionally needed and are therefore uneconomical. Furthermore, the work mahcine must be spaced from the vehicle body to avoid interference between the two sheets. This entails the problem of impairing the weight balance longitudinally of the vehicle. To overcome these problems, a support table is mounted on the vehicle body by a parallel link assembly which is pivotally movable longitudinally of the body, and a swivel table for supporting the seat thereon is mounted on the support table swivelably about a vertical shaft. Further provided is a lock for locking the swivel table against swiveling about the shaft, and unlocking device for unfastening the lock.