JP2006304805A - Operating unit for farm working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operating unit for farm working machine that can improve the operability by the operator by providing a plurality of the operation parts for moving up and down of a working implement controlling the switching on/off of the power transmission. <P>SOLUTION: The up-and-down/operation switch (25) for controlling the up-and-down motion of the farm working implement (7) and controlling the switching on/off of the power transmission to the working implement is provided at a grip part (19a) of a shift gear (19), and the descending button (29) for lowering the working implement (7) to the grip part (19a), and a finger-up lever (32) for lifting control of the working implement and controlling the switching on/off of the power transmission toward the working implement (7) are provided near the steering handle (5). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an operating device for a farm working machine such as a riding rice transplanter or a riding tractor, and belongs to the technical field of agricultural machinery.

There is an interlocking structure in which a planting clutch for seedling planting transmission is turned on and off by a lifting lever for lifting a working device such as a seedling planting unit with respect to the vehicle body (Patent Document 1).
Japanese Patent Laid-Open No. 9-23

  In particular, in the rice planting machine, the raising and lowering of the seedling planting unit and the on / off operation of the planting clutch are frequently performed during the operation. According to the present invention, an operator can freely select and use one that is easy to use in the work by providing two systems of lifting / working (planting) clutch operation parts of the working device (seedling planting part). Thus, the operability is improved.

  In order to solve the above problems, the present invention has taken the following technical means. In other words, the grip portion (19a) of the speed change lever (19) is provided with a lift / work switch (25) for controlling the lifting / lowering control of the work device (7) and the transmission of power to the work device, and the grip portion (19a). A lowering button (29) for lowering the working device (7) is provided, and a finger gap for controlling the lifting and lowering of the working device (7) and power transmission to the working device (7) near the steering handle (5). A lever (32) is provided. As a result, there are two operating units for controlling the lifting and lowering of the working device (7) and the power transmission to the working device (7), and the operator can conveniently use the one that is easy to use during work. Operability is improved. Furthermore, since the grip part (19a) has a lowering button (29) for lowering the working device (7), the operability is further improved.

  According to the present invention, while changing the vehicle speed of the agricultural working machine by operating the speed change lever (19), the operator holds the grip portion (19a) of the speed change lever (19) and moves the lift / work switch (25). Can be moved up and down with respect to the vehicle body, and the transmission of the work device (7) can be controlled to be turned on and off, and the work device (7) can be lowered with the lower button (29). it can.

  Further, the operator operates while steering the aircraft by operating the steering handle (5), and when the operator turns the aircraft greatly to reach the heel, the operator pushes the finger gap lever (32) near the steering handle (5). By holding and operating, the work device (7) can be raised and lowered relative to the vehicle body, and the transmission of the work device (7) can be controlled.

  Therefore, since there are two operation sections for controlling the lifting / lowering of the work device (7) and the power transmission to the work device (7) in this way, the operator can use the one that is easy to use during work. This is convenient, and the grip portion (19a) is provided with a lower button (29) for lowering the work device (7), so that the operability is improved.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a passenger rice transplanter, and a pair of left and right front wheels 2 and 2 and rear wheels 3 and 3 as running wheels are installed before and after a vehicle body 1. A steering device having an operation box 4 and a steering handle 5 and the like is installed on the step 6 at the front upper portion of the vehicle body, and a working device (seedling planting portion 7) capable of ascending and descending is provided at the rear portion of the vehicle body. A driver's seat 8 is installed on the rear side of the operation box 4, and an engine 9 for transmitting power to each part of the rice transplanter is mounted below the driver's seat.

  The vehicle 1 travels by driving the front wheels 2 and 2 and the rear wheels 3 and 3 through the main transmission of an HST (hydraulic continuously variable transmission) 10 and the auxiliary transmission in the transmission case 11 by driving the engine 9. It is configured to be able to travel. The working device 7 includes a seedling loading tank 12 that reciprocates left and right, a planting device 13 having a planting ridge that cuts out one seedling and transplants it into the soil, a float 14 that levels the seedling planting surface, and the like. Become.

  The working device is lifted by connecting the working device to the rear side of the vehicle body 1 via the lifting link mechanism 15 and moving up and down by the expansion and contraction of the lifting cylinder 16 to rise to the non-working position or to the ground working position. can do. The power transmission to the working device 7 is performed from the engine 9 via the PTO shaft 17 and via a PTO (planting) clutch 18 that turns on and off the transmission of the PTO shaft 17.

  The HST 10 is shifted by a shift lever 19 provided on the right side of the driver's seat 8. When the shift lever 19 is operated to the neutral position, the traveling drive motion stop state is set, and the shift lever 19 is moved forward to the high speed state, and the neutral position is moved to the rear side to set the reverse high speed state. The forward / reverse speed can be increased or decreased according to the inclination angle of the speed change lever 19.

  The auxiliary transmission lever 20 is provided on the side of the operation box 4. A lift control valve 21 of a hydraulic circuit that extends and retracts the lift cylinder 16 and a PTO clutch 18 are interlocked via an operation drive mechanism 23 by an actuator 22 such as an electric motor 22M or a stepping motor. The actuator 22 is actuated by an output from the controller 24 by ON / OFF operations of the later-described lift / work switches 25 and 26 provided on the grip portion 19a of the speed change lever 19.

  The grip portion 19a of the speed change lever 19 is provided with elevating / operating switches 25 and 26 for controlling the elevating control of the working device 7 and the transmission of power to the working device. A series of operations can be carried out without changing the gripping hand from the grip portion 19a, or an elevating operation and a planting transmission operation can be performed while shifting.

By operating the shift lever 19, the vehicle speed of the agricultural machine can be changed by operating the HST 10. The operator operates the up / down switch 25U or the down switch 25D of the up / down / work switch 25 while holding the grip portion 19a of the shift lever 19 to output the actuator 22 via the operation drive mechanism 23. The elevating control valve 21 can be switched to expand and contract the elevating cylinder 16 so that the work device 7 can be raised and lowered relative to the vehicle body. Further, when the lifting / lowering switch 26 is operated, the actuator 22 is operated, and the PTO clutch 18 is turned on and off via the operation driving mechanism 23 to drive the working device 7.

  The up / down / work switch 26 can be configured independently of the down switch 25D of the up / down / work switch 25. However, in the illustrated example, the actuator 22 and the operation drive mechanism 23 are shared with the linkage of the up / down control valve 21. Therefore, the up / down / work switch 26 can be shared with the down switch 25D. In this case, when the seedling planting device 7 is lowered to a certain working position by the detection of the lift link sensor 30 for detecting the raising / lowering position of the raising / lowering cylinder 16 or the grounding sensor 31 by the vertical movement of the center float 14C, The clutch 18 is actuated to perform seedling planting work.

  The raising / lowering / working switch 25 has a raising button 27 that switches between raising and lowering each time it is pressed, and a lowering button 28 that switches between lowering and lowering each time it is pushed. Each press can be switched between ascending and stopping and ascending and descending.

  The grip portion 19a is provided with a lowering button 29 dedicated to lowering, which is different from the lowering button 28 that is lowered by pushing and stops the lowering when the pushing is released. In the vicinity of the steering handle 5, there is a structure having the same function as the lift / work switches 25, 26, that is, a finger gap lever 32 for controlling the lifting / lowering of the work device 7 and power transmission to the work device 7. Is provided. By raising and lowering the finger gap lever 32, the actuator 22 is output, the elevation control valve 21 is switched via the operation drive mechanism 23, and the elevation cylinder 16 is expanded and contracted to raise and lower the work device 7 relative to the vehicle body. be able to. At the same time, when the finger gap lever 32 is raised and lowered, the actuator 22 is operated and the PTO clutch 18 is turned on and off via the operation drive mechanism 23, so that the working device 7 is moved to the working position when lowered. It can be driven and can be cut off during non-working when it is raised.

  The operation circuit by the finger gap lever 32 and the up / down / work switches 25 and 26 is configured such that the switch contacts are input in a parallel circuit. That is, the raising / lowering switches Su, Sd of the finger gap lever switch 32S and the raising / lowering operation switches 25U, 25D of the elevation / operation switches 25, 26 are configured in a parallel circuit.

  Normally, the traveling operation is performed while correcting the traveling direction of the airframe by operating the steering handle 5, and the operator holds the finger gap lever 32 near the steering handle 5 when turning the airframe to reach the heel. It can be operated quickly, and the working device 7 can be raised and lowered relative to the vehicle body, and the transmission of the working device can be controlled.

  The operation drive mechanism 23 driven by the actuator 22 is configured to drive the lift control valve 21 and the PTO clutch 18 and also to drive a lift lever 33 for manual operation on the side of the driver's seat 8. A rack gear 35 that meshes with a pinion 34 that is an operation drive mechanism 23 is rotatably supported around a shaft 37 that is provided on a bracket 36 that is a component member integral with the vehicle body by the motor of the actuator 22 motor. The shaft 37 is provided with a positioning cam 38 that is integral with a seedling raising / lowering lever 33 that is a manual operation mechanism. A cam roller 40 of the swing arm 39 is slidably fitted on the outer peripheral portion of the positioning cam 38, and the rotation position of the positioning cam 38 is locked or unlocked in a rotatable state. be able to. Reference numeral 41 denotes a support shaft of the swing arm 39, and 42 denotes a spring for resiliently pushing the cam roller 40 toward the positioning cam 38.

  The seedling raising / lowering lever 33 is integrally provided with a clutch cam arm 43, and the clutch cam arm 43 presses the cam of the PTO clutch (planting clutch) 18 for transmission to the seedling planting work device 7. The PTO clutch 18 can be turned on and off. Further, the lift lever 33 is provided with a valve arm 44, which can be operated to press the spool of the lift control valve 21 to switch the lift link mechanism 15 from the neutral position to the lowered position or the raised position.

  Between the arm 45 of the seedling raising / lowering lever 33 and the arm 46 integral with the positioning cam 38, a pin 48 constituting the positioning floating mechanism 47 and a long hole 49 for fitting the pin 48 are provided. A pin 48 is fixed to the arm 46, and a long hole 49 is formed in the arm 45.

  Driving of the operation mechanism by the actuator 22 motor is performed by an output from the controller 24. Further, operation switches, sensor switches, control programs, and the like are input to the input side of the controller 24. The operation switches include the up / down / work switches 25 and 26, the lowering switch 50, the switch 32S by operating the finger gap lever 32, and the control output may be by turning off the engine switch 51, or by a sensor switch. The grounding sensor 31 by the ground contact of the center float 14C that detects that the seedling planting device 7 is lowered and is in the seedling planting position, the lift link sensor 30 that detects the lifting position of the lifting link mechanism 15, the back lift input There is a case where the reverse position sensor 52 is entered, for example, when the reverse lever is turned on.

  An actuator sensor 53 for detecting the rotational position of the rack gear 35 is attached to the bracket 36. When the tip of the telescopic arm 54 rotated integrally with the rack gear 35 is engaged with the pin groove of the sensor arm 55 of the actuator sensor 53, the arm 54 is rotated together with the rack gear 35. The combined sensor arm 55 is rotated, and the actuator sensor 53 detects the rotation angle of the rack gear 35.

  In the operation by the seedling raising / lowering lever 33, the clutch cam arm 43 and the balm arm 44 are rotated, and the PTO clutch 18 and the raising / lowering control valve 21 are actuated to lower the planting cut position A from the neutral position N and lower planting. It is possible to switch to the entry position B and the raising position C. At these positions N, A, B, and C, the cam roller 40 is engaged with each engagement position of the positioning cam 38. At this time, the actuator 22 is in a freely rotatable state, and even if the pinion 34 is rotated by the rotation of the rack gear 35, there is no great resistance.

  That is, at the neutral position N, the seedling planting device 7 is not lifted and the PTO clutch 18 to the seedling planting device 7 is also in a disengaged state. At the lower planting cut position A, the seedling planting device 7 is lowered, but this PTO clutch 18 is in a cut state and seedling planting cannot be performed. In the lowered planting entry position B, the seedling planting device 7 is lowered, and the PTO clutch 18 is in the state and seedling planting can be performed. Further, at the raising position C, the seedling planting device 7 is raised to the non-seedling position, and the PTO clutch 18 is also in a disengaged state.

  When the finger gap lever 32 is operated, each time the finger gap lever 32 is pulled upward, the switch 32S is turned to the raised position (raising contact point Su), and the actuator 22 is kept constant by intermittent output from the controller 24. By rotating the output, the balm arm 44, the positioning cam 38, and the like are rotated in the upward direction at every pitch. This one pitch is set as an interval between the engaging positions of the cam roller 40 in the positioning cam 38.

  On the contrary, every time the finger galley 32 is pushed down once, the switch 32S is turned on to the lowered position (lowering contact Sd), and the balm arm 44, the positioning cam 38, etc. are rotated in the downward direction at every pitch. In FIG. 6, the raising position switch 56 is a sensor that detects that the lifting link mechanism of the seedling planting device 7 is in the uppermost position, and is higher than a predetermined value of the raising switch 25 </ b> U of the shift lever 19 or the finger gap lever 32. As a result of the lifting operation, the overhanging side of the marker 57 provided on the left and right sides of the machine body can be switched. The marker 57 is configured to be switchable between a position projecting outward from the aircraft and a position accommodated on the aircraft, and during seedling planting work, for example, the right marker acts on the projecting position in the forward path. If the left marker is operating at the overhanging position on the forward path, the marker is set so that the right marker is overhanging on the return path. The right SOL 58 is operated and switched. Then, each time the lift switch 25U of the shift lever 19 is operated with the lifting link mechanism in the uppermost position, the marker 57 that projects is switched to the left and right, and the marker 57 is switched to the left and right while the shift lever 19 is held. Therefore, the operator can easily perform the left / right switching operation of the marker 57.

  Another embodiment 1 (FIG. 10) will be described. Lift / work switches 25 and 26 for controlling the lifting / lowering of the working device 7 and the transmission of power to the working device in the grip portion of the transmission lever 19, and the lifting / working switch 25 in the lifting / working switch 25 are lifted and lifted and stopped every time it is pushed And a lowering button 28 that switches between lowering and lowering each time it is pressed, the working device can be moved to a predetermined upper / lower limit position by pressing the up button 27 or the lowering button 28 once. A mode changeover switch 60 is provided in the grip portion 19a itself of the speed change lever 19 for switching between a mode that moves up and down and a mode that moves up and down only while the up button 27 or the down button 28 is pushed. is there.

  Therefore, since this mode switching can be performed by the switch, it is easy to finely adjust the vertical movement of the working device in the dredging work or the like. Since the mode change switch is in the grip, operability is improved. In the embodiment shown in FIG. 11, the mode changeover switch 60 is installed on the lever guide panel 61 in the vicinity of the speed change lever 19.

  In the embodiment shown in FIG. 12, the mode changeover switch 60 and the monitor lamp (mode display lamp) 62 are provided on the operation panel 63 at the upper end of the operation box 4. Therefore, according to the embodiment shown in FIG. 11 and FIG. 12, the number of normally operated switches is reduced, and operability can be improved and erroneous operation can be prevented.

Side view of rice transplanter Top view of rice transplanter Front view and side view of transmission lever Transmission path block diagram Operation control block diagram Operation control block diagram flowchart Side view of the operation drive mechanism Same as above Perspective view of transmission lever Perspective view of transmission lever A plan view of the operation panel and a perspective view of the shift lever portion

Explanation of symbols

1 body
2 Front wheels
3 Rear wheel 4 Operation box
5 Steering handle 6 steps
7 Working device (seed planting part)
8 Driver's seat
9 Engine 10 HST
11 Mission Case 12 Seedling Tank
13 Planting device 14 Float
15 Lifting link mechanism 16 Lifting cylinder
17 PTO shaft 18 PTO clutch
19 Shift lever 19a Grip part
21 Lift control valve 22 Actuator
23 Operation drive mechanism 24 Controller
25 Lift / Work Switch 26 Lift / Work Switch
27 Up button 28 Down button
29 Lowering button 30 Link lift sensor
31 Ground sensor 32 Finger gap lever
32S finger gap lever switch

Claims (1)

The grip portion (19a) of the speed change lever (19) is provided with a lift / work switch (25) for controlling the lifting / lowering control of the work device (7) and the transmission of power to the work device, and the work device is provided on the grip portion (19a). There is provided a lowering button (29) for lowering (7), and a finger gap lever (near the steering handle (5)) for controlling the lifting and lowering of the working device (7) and power transmission to the working device (7). 32) An operating device for an agricultural machine characterized by being provided.

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