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    POWER STEERING SYSTEM FOR VEHICLE
    8.
    发明专利
    POWER STEERING SYSTEM FOR VEHICLE 失效

    公开(公告)号：JPH02267075A

    公开(公告)日：1990-10-31

    申请号：JP8532389

    申请日：1989-04-03

    申请人： KUBOTA LTD

    发明人： HASEGAWA TAKASHI

    IPC分类号： B62D6/02 ,  B62D5/07

    摘要： PURPOSE:To prevent possible zigzag driving so as to enhance safety by lowering a power steering pump in revolution when a vehicle is found to have been in high speeds by a speed detector. CONSTITUTION:When a vehicle is found to have been in high speeds by a speed detector, the detected signal is fed back to the duty solenoid valve 64, transfer hydraulic pressure being acted to a clutch 44 via a valve 65 so as to let the clutch 44 be, so called, coupled with slip so that a hydraulic pump 41 is lowered in revolution. This causes a power steering hydraulic system 55 to be lowered in pressure while the rotating resistance of a steering handle 24 becomes heavy by that amount. Moreover, when no signal is outputted from the speed detector, the line pressure of a pump 42 is transmitted to the clutch 44. Since the hydraulic clutch 44 is engaged therewith, the pump 41 is, in this place, thereby rotated by an engine 2 at the normal revolution.

    TREAD ADJUSTING DEVICE FOR STEERING WHEEL
    9.
    发明专利
    TREAD ADJUSTING DEVICE FOR STEERING WHEEL 失效

    公开(公告)号：JPH02267002A

    公开(公告)日：1990-10-31

    申请号：JP8859689

    申请日：1989-04-07

    申请人： KUBOTA LTD

    发明人： IWAMOTO MASATOSHI

    IPC分类号： B60B35/14 ,  B60B35/16

    摘要： PURPOSE:To facilitate tread adjustment by supporting a steering wheel by means of a supporting body movable right and left and having a regulation means, forming a tie rod for steering control to freely expand and shrink right and left, and providing an oil pressure drive regulating means. CONSTITUTION:A cylindrical movable case 12 is inserted slidably on the right and left of a front axle case 2, a front wheel is supported through a gear case 14, and a supporting body regulating means 13 is provided at the movable case 12. A power steering oil pressure cylinder 31 is provided at the front surface of an axle case 2, and a tie rod 34 for steering control is provided including a piston rod 33 and a tie for regulating means 54. This tie rod 34 is formed of relatively movable rods 50, 52, and the oil pressure-actuated regulating means 54 is provided. The regulating means 54 is composed of an inner and an outer cylinder 57, 52, a slider 64, a positioning body 59, a recess part 60 for its engagement, etc., and it is actuated by pressure oil to an oil chamber 71. Tread adjustment is facilitated in this constitution.

    STRUCTURE FOR HOUSING RESERVE SEEDLING OF RICE TRANSPLANTER
    10.
    发明专利
    STRUCTURE FOR HOUSING RESERVE SEEDLING OF RICE TRANSPLANTER 失效

    公开(公告)号：JPH02265407A

    公开(公告)日：1990-10-30

    申请号：JP8749389

    申请日：1989-04-05

    申请人： KUBOTA LTD

    发明人： OTSUBO HIROSHI ,  OKUDA HIROSHI ,  KOJIMA YOSHIYUKI ,  FUKUDA MASATAMI ,  MUKAI TAKESHI ,  MATSUSHITA YOSUKE

    IPC分类号： A01C11/02

    摘要： PURPOSE:To reduce loss of shape and prevent a missing plant from occurring by providing a structure with a controlling means for operating a driving actuator when a stroke end detecting sensor performs detaching operation and changing over a reserve seedling housing device to a state for supplying seedlings. CONSTITUTION:If abnormal operation in which a sensor 16 for the amount of residual seedlings performs detecting operation in the course of a transverse movement of a seedling carrier, an output thereof attains a low level to output a high-level signal from a NOR circuit 27 in reaching the stroke end. The first timer circuit 28 maintains a high-level output for a prescribed time from the time of the stroke end to operate an electromagnetic solenoid 14 for a prescribed time. On the other band, the second timer circuit 20 keeps a high level for a prescribed time from the time of the stroke end. Seedlings are supplied just after the operation time of the electromagnetic solenoid 14 and the sensor 16 for the amount of the residual seedlings attains an undetecting state. Thereby, a high level output is outputted from an AND circuit 33 only for a prescribed time to instantaneously drive a buzzer 37 and a lamp 38.