KR20020020841A - Driving device for working vehicle - Google Patents

Abstract

PURPOSE: To facilitate the elevating and lowering operability for a powered farm machine. CONSTITUTION: The objective transmission lever for a seedling transplanting machine is characteristically equipped with a lifting switch 4 for elevating and lowering the working unit and a working switch 5 for work transmission on the grip 2 of the transmission lever 1.

Description

Control device of mobile farming machine {DRIVING DEVICE FOR WORKING VEHICLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an operating device for a mobile farming machine. In particular, a lifting switch for elevating a work device and a work switch for working transmission are provided in a shift lever for shifting a vehicle speed. It can be used for various planting machines, combines, etc. installed in a planter, a tractor (tractor).

Conventionally, the interlocking structure is configured to bite or disconnect the seedling transplant transmission clutch by a lift lever for lifting and lowering the seedling transplant apparatus with respect to the vehicle body.

Such a conventional seedling transplanter collects at the end of a seedling transplant part and performs seedling replenishment operation | movement, raising or lowering a seedling transplantation apparatus with respect to a vehicle body while driving a pavement surface, or biting or cutting | disconnecting a seedling transplantation electric clutch. Since many operations are required, the operation was complicated and difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to improve operability such as quickly and accurately performing a series of operations from shifting a vehicle to shifting a work device from a vehicle shift without changing a hand holding a grip part. There is.

1 is a front view and a side view of a shift lever part;

2 is an operation control block diagram,

3 is a block diagram of an electric system,

4 is a side view of the operation drive mechanism;

5 is a front view of the operation drive mechanism;

6 is a plan view of the seedling transplanter,

7 is a side view of a seedling transplanter,

8 is a side view of a shift lever portion, and a plan view of the grip portion, showing another embodiment of the present invention;

※ Explanation of Major Drawings

1 ... Shift lever

2 ... grip

3 ... Work Tool

4 ... lift switch

5 ... work switch

6 ... Up Button

7. Down button

8 ... lower button

The invention according to claim 1 is provided with a lift switch 4 for elevating a work device 3 on a grip part 2 of a shift lever 1, and a work switch 5 for performing work transmission. The shift lever of the mobile farming machine characterized by the above-mentioned.

The invention as set forth in claim 2 is characterized in that the elevating switch 4 has a rising button 6 which changes to an up and down stop every time it is pressed, and a falling button 7 which is changed to a down and down stop every time it is pressed. It is.

The invention according to claim 3 is characterized in that the lowering button 7 changes the locking and disconnection of the work transmission following the lowering of the working device 3 to the working position.

The invention according to claim 4 is characterized by varying the amount of protrusion of the rise button 6 and the down button 7.

The invention as set forth in claim 5 is characterized in that the up button 6 is located at the tip side of the grip portion 2, and the down button 7 is disposed below the up button 6.

The invention according to claim 6 is characterized in that the grip portion 2 is provided with a lower button 8 that lowers by pressing and stops lowering by pressing release.

The invention according to claim 7 is characterized in that the lower button 8 is arranged behind the up button 6 and the down button 7.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The operating apparatus of the mobile farming machine which concerns on this invention can be used for a seedling transplanter, a fertilizer seeding machine, the various management work machines attached to a tractor, a combine, etc. In a mobile farming machine such as a seedling transplanter, as shown in the drawing, the traveling of the vehicle body 9, the lifting and lowering of the work device 3 mounted to be able to lift and lower the car body 9, and the work device 3 ) Is in the form of performing each operation, such as working on the ground by rolling from the vehicle body side 9.

Accordingly, the vehicle body 9 is driven through the main transmission which is the HST (hydraulic continuously variable transmission) 11, the sub transmission in the mission case 12, etc. by the drive of the engine 10. The front wheels 13 and the rear wheels 14 are configured to travel by driving. In addition, in the lifting and lowering of the work device 3, the work device 3 is connected to the rear of the vehicle body 9 via a lift link 15 and lifted by the expansion and contraction of the lift cylinder 16. It is possible to ascend to the non-working position or to descend to the ground work position. In addition, the transmission of the work device 3 is made from the engine 10 via the PTO shaft 17, and in particular, through the PTO clutch 18 which intercepts the transmission of the PTO shaft 17.

The HST 11 is shifted by the shift lever 1 provided on the right side of the driver's seat 19. When the shift lever 1 is operated in the neutral position, the vehicle is in a driving electric stop state, and the shift lever 1 is moved forward to operate at a high speed forward state, and the shift lever 1 is operated at a rearward position from the neutral position to become a high speed reverse state. The forward / reverse speed can be increased / decreased according to the inclination angle of (1).

In addition, the auxiliary shift lever 20 is provided on a dashboard 22 below the steering wheel 21.

The lift control valve 23 and the PTO clutch 18 of the hydraulic circuit that expand and contract the lift cylinder 16 are operated by the actuator 24 by an electric motor, a stepping motor, or the like. It is linked by). The actuator 24 is operated by the output from the controller 26 in accordance with the ON / OFF operation of the lifting switch 4, the work switch 5, and the like arranged on the grip portion 2 of the shift lever 1. do.

The work device 3 is a seedling work device of a multi-row transplantation type, which is a seedling tank 27 capable of accommodating a mat-like seedling and reciprocating from side to side, and each seedling tank 27. ) Seedling transplantation tank (28) which separates seedlings to be discharged from the soil, and transplants them to the soil surface below, and a center float (30) and a side float that support these seedling transplant frames (29) and slide the soil surface. 31) and the like. The grounding sensor 32 which detects a ground state according to the vertical movement of this center float 30 is provided, The said lift control valve 23 is changed by the detection of this grounding sensor 32, and the lift cylinder 16 is changed. By stretching and contracting, the ground height of the seedling transplant work device 3 at the time of seedling transplant work is kept constant and controlled so as to keep the seedling transplant depth constant.

Here, this invention is implemented in the following forms. That is, the invention described in claim 1 is provided with a lift switch 4 for elevating the work device 3 and a work switch 5 for working transmission on the grip portion 2 of the shift lever 1. By performing a series of operations from shifting up and down to the work transmission 3 to work transmission without changing the hand held by the grip portion 2, or by performing a lift operation and a transplantation transmission operation while shifting, Quick operation can improve operability.

Here, by operating the shift lever 1, the HST 11 can be operated to change the vehicle speed of the work machine. The manipulator outputs the actuator 24 by operating the lift switch 4U or the pull down switch 4D of the lift switch 4 in a state of holding the grip portion 2 of the shift lever 1. The work device 3 can be raised and lowered with respect to the vehicle body 9 by changing the lift control valve 23 through the 25 to expand and contract the lift cylinder 16. In addition, by operating the work switch 5, the actuator 24 is operated to intermittently operate the PTO clutch 18 through the operation drive mechanism 25 so that the work device 3 is driven. To be able.

The working switch 5 can be configured to be independent of the lowering switch 4D of the elevating switch 4. However, in the illustrated example, the elevating control valve 23 moves the actuator 24 and the operation drive mechanism 25. This work switch 5 can also be shared with the lower switch 4D because it is a form of interlocking and common use. In this case, a seedling transplant apparatus by detection of the lift link sensor 33 which detects the lift position of the lift cylinder 15, or the ground sensor 32 along the upper and lower sides of the said center float 30. When (3) is lowered to a certain work position, the PTO clutch 18 is operated to be bitten, so that the mother transplantation work can be performed.

The invention as set forth in claim 2 has an up button 6 which is changed to an up and down stop every time the elevating switch 4 is pressed, and a down button 7 which is changed to a down and down stop every time it is pressed. Each time the up button 6 and the down button 7 are changed to the up and down stop, the down and the down stop, respectively, these operations can be precisely and easily performed. In addition, the ascending and descending strokes can be kept long in time, and can perform a rapid ascending / descending.

Here, the rising switch 4U is operated ON by pressing the rising button 6, and the falling switch 4D is operated ON by pressing the falling button 7. Each time the lift button 6 is pressed, the lift control valve 23 is switched through the actuator 24 or the operation drive mechanism 25 to extend the lift cylinder 16 to raise the work device 3. Or to stop the climb. During this ascending operation, the elevating control valve 23 is held at the ascending position, so that the work device 3 is continuously raised.

In addition, whenever the lowering button 7 is pressed, the lowering switch 4D is turned ON, and the lowering of the work device 3 is changed to the lowering and the stopping of the lowering. When descending, the work device 3 is continuously lowered.

According to the invention as set forth in claim 3, since the lowering button 7 can be switched to the interruption of work transmission after the lowering of the working device 3 to the working position, the lowering button 7 is The work device 3 can be lowered, but when the work device 3 has reached the work position, each time the down button 7 is pressed, the work transmission to the work device 3 is switched or continued. You can perform or stop the work. By the same lowering button 7 which lowers the work device 3, it can be switched between work transmission and electric stop, thereby improving operability.

The invention as set forth in claim 4 sets the protrusion amount of the up button 6 and the down button 7 differently, so that the protrusion amount from the grip portion 2 of the up button 6 and the down button 7 is different. By differentiating the operation feeling between the buttons, the differentiation between the up button 6 and the down button 7 can be improved, and the misoperation can be reduced.

In the invention according to claim 5, the up button 6 is positioned at the tip side of the grip portion 2, and the down button 7 is disposed below the up button 6, and the grip portion of the shift lever 1 is positioned. (2) Since the up button 6 is provided at the tip side and the down button 7 is disposed under the tip side, the operation is selected accurately by corresponding to the same direction as the lifting direction of the work device 3, thereby reducing the misoperation. Can be.

According to the sixth aspect of the present invention, the grip portion 2 includes a lower button 8 that lowers by pressing and stops lowering by pressing release, and the lower portion of the lower lever 8 of the shift lever 1 By having the lower button 8 dedicated for lowering separately from 7), the lowering / lowering of the work device 3 is performed by pressing and releasing the lower button 8 in the position adjustment of work start right next to the paddy field. The stops can be switched for easier subtle positioning and improved operability.

The invention according to claim 7, wherein the lower button 8 is disposed behind the up button 6 and the down button 7, and the lower button 8 with less use frequency is the up button 6 or the down button. Since it is located behind (7), it can reduce misoperation.

Here, each of the up button 6, the down button 7, and the lower button 8 is arranged on the thumb side of the grip portion 2, but on the contrary, is disposed on the pinky or ring finger side, the middle finger It can also be configured to be operated by pressing. In addition, these up and down buttons 6 and 7 may be provided on the thumb side, and the lower button 8 may be provided on the opposite side. Moreover, in order to change the finger | tip contact feeling of each button 6, 7, 8, you may change the external shape and the uneven | corrugated shape of a contact surface.

60 is an auxiliary seedling loading frame, which is disposed on the left and right sides of the dashboard 22 in front of the vehicle body 9. 61 is a fertilizing apparatus which fertilizes the soil surface near the seedling transplant position of the seedling transplant tank 28. As shown in FIG.

The operation drive mechanism 25 driven by the actuator 24 drives the lift control valve 23 and the PTO clutch 18 as described above, and the lift lever for manual operation next to the driver's seat 19 ( 34) can also be driven.

The shaft 35 in which the rack gear 56 which is engaged with the pinion 55 which is the operation drive mechanism 25 by the transmission of this actuator 24 motor is provided in the support 52 which is a structural member integral with the vehicle body 9. The rotational movement is freely axially supported. In addition, the shaft 35 is provided with a positioning cam 36 which is integral with the seedling implantation raising and lowering lever 34 which is a manual operation mechanism. The cam roller 38 of the swinging arm 37 is fitted in the sliding contact state on the outer circumferential portion of the positioning cam 36 so as to engage the rotational movement position of the positioning cam 36 or rotate it. The jam can be released in this free state. 39 is a support shaft of this swinging arm 37, 40 is a spring which elastically pushes the cam roller 38 toward the positioning cam 36. As shown in FIG.

The clutch cam arm 41 is integrally provided in this seedling transplant lifting lever 34, and the PTO clutch (seedling transplant clutch) for transmission by the clutch cam arm 41 to the seedling transplant work device 3 ( The PTO clutch 18 can be interrupted by pressing the cam of 18). Moreover, the valve arm 42 is provided in this seedling transplant lifting lever 34, and presses the spool of the lifting control valve 23 to move the lift link 15 from the lower position or the upper position. Can be manipulated to switch to position.

Between the arm 43 of such seedling transplant lifting lever 34 and the arm 44 which is integral with the positioning cam 36, the pin 45 which comprises the positioning rocking mechanism 59 and this pinch are fitted. A long hole 46 to be fitted is formed. The pin 45 is fixed to the arm 44, and the long hole 46 is formed in the arm 43. The relative position of the rack gear 34 and the positioning cam 36 on the shaft 35 is engaged through the swinging gap formed by the pin 45 and the long hole 46 between these arms 44 and 43. Since the position of the rotary motion of the positioning cam 36 relative to the rack gear 56 can be moved back and forth, the positioning cam 36 and the cam roller 38 are engaged at a constant position. For this reason, the position of the seedling implantation raising / lowering lever 6 is locked to the position determined by the positioning cam 36 and the cam roller 38, and the seedling transplantation raising / lowering lever 34 by control of the actuator 24 motor is carried out. Hunting can be prevented.

In addition, since the cam roller 38 acting on the positioning cam 36 is pressed by the elasticity of the spring 40, the positioning cam 36 driven by the actuator 24 motor to a predetermined position is Since the pin 45 is rotated ahead of the loose side of the long hole 46 into which the pin 45 is fitted, the positioning cam 36 is positioned at an early stage, and hunting can be prevented more effectively.

Such driving of the operating mechanism by the actuator 24 motor is performed by the output from the controller 26. In addition, an operation switch, a sensor switch, a control program, or the like is input to the input side of the controller 26. Examples of the operation switch include the lift switch 4, the work switch 5, the lower switch 8, the switch 48 by the operation of the lever 47, and the control output of the engine switch 50. In the case of a sensor switch, the grounding sensor 32 and the lift link by the ground of the center float 30 which detect that the seedling transplant work device 3 descends and are in the seedling transplant work position may be turned off. As the lift link sensor 33 for detecting the lift position of 15 and the back lift control lever enter, there is a case of inputting the reverse position sensor 49 for the retraction control. In addition, the operation position of the actuator sensor 51 for detecting the rotational movement position of the rack gear 56 is provided on the support (52). The tip of the freely expandable arm 53 which rotates integrally with the rack gear 56 is engaged with the pin groove of the sensor arm 54 of the actuator sensor 51, and the arm 53 together with the rack gear 56. ) Rotates, the sensor arm 54 engaged with it rotates, and the actuator sensor 51 detects the rotational movement angle of the rack gear 56.

Operation by the seedling transplant lifting lever 34 and the actuator 24 will be described. In operation by the seedling transplant lifting lever 34, the PTO clutch 18 and the lifting control valve 23 are operated by the rotation of the clutch cam arm 41 and the valve arm 42, and the neutral position N is removed from the neutral position N. FIG. It can be switched to the lower seedling transplant end position (A), and the lower seedling transplant joint position (B), and the upper position (C), in each of these positions (N, A, B, C) positioning cam 36 The cam rollers 38 are engaged with each engaging position of. At this time, since the actuator 24 is free to rotate, even if the pinion 55 is rotated by the rotational movement of the rack gear 56, there is no great resistance. In addition, since the actuator sensor 51 is also rotating, the operation position is input to the controller 26 and is in a state where it can be displayed on the indicator 58 provided near the shift lever 1.

That is, in the neutral position N, since the seedling transplant apparatus 3 is not lifted, the PTO clutch 18 to the seedling transplant apparatus 3 is also in the broken state. In the lower seedling transplantation disconnected position A, the seedling transplant work device 3 is lowered, but the PTO clutch 18 is disconnected, so that seedling transplantation cannot be performed. In the lower seedling transplant joint position B, the seedling transplant work device 3 is lowered, and the PTO clutch 18 is bitten so that seedling transplantation can be performed. Moreover, in the upper position C, the seedling transplant apparatus 3 is raised to a non-plant seedling transplant position, and this PTO clutch 18 is also in the broken state.

The clutch cam arm 41 and the valve arm 42 are operated by driving the actuator 24. In order to operate the actuator 24, the operation switches 4, 5, 8 and 48 are operated. ), The case of the sensor switches 49, 32, 33 and 51, the case of the control output 50, and the like. Among these, when operating by the lever 47, the switch 48 is turned ON every time the lever 47 is pulled upward once, and the controller ( By rotating the actuator 24 to a constant output by the intermittent output from 26, the valve arm 42, the positioning cam 36, and the like are rotated in the upward direction by one pitch. This pitch is set as each engagement position interval of the cam roller 38 in the positioning cam 36. On the contrary, each time the lever 47 is pushed down once, the valve arm 42, the positioning cam 36, and the like are rotated in the downward direction by one pitch.

In the case of the sensor switch, when the back lift control lever 57 is operated in the bite position, the reverse position sensor 49 detects that the main shift lever 1 has been operated in the reverse position. By doing so, the actuator 24 is driven to switch the lift control valve 23 to the upper position C. As shown in FIG.

Further, as a case of the control output, by turning off the engine switch 50, the actuator 24 is driven to switch the lift control valve 23 to the neutral position N and the seedling transplant work device 3 is neutral. Position. Thereby, the seedling implantation raising / lowering lever 34 will always be in the neutral position N at the time of engine start-up, and it can prevent that the seedling work apparatus 3 is driven or raised suddenly at the time of engine start-up.

In addition, when the seedling transplant working device 3 is vertically moved by the grounding of the float ground sensor 32 to control the seedling implantation depth constantly, the actuator 24 is performed at the lower seedling transplantation biting position B. Is performed by a configuration that is separate from the case of driving.

In FIG. 8, the main difference from the above example is that the up button 6 and the down button 7 for operating the lift switch 4 are provided on the upper surface of the grip 2 of the shift lever 1. Among them, if the pushing button 6 is pressed while the work device 3 is lowered by pressing the lowering button 7, the lowering movement is temporarily stopped, and when the lowering button 7 is pressed again, the program of the controller 26 is lowered again. This is made up. Moreover, in pushing down this fall button 7, it raises when pushing up the button 6 twice continuously during fall. Further, when the rising button 6 is pressed at the time of the temporary dropping, it rises. Furthermore, the lowering button (7) is pushed down, and pressing the lowering button (7) once more causes the PTO clutch (18) to bite to perform seedling transplant work. 62 is a support shaft of the shift lever 1, and 63 is an interlocking link with the HST 11.

When it is comprised by such an operation form, it is effective when lowering the seedling transplant work apparatus 3 and putting it next to a rice paddy, and operation becomes easy.

According to the present invention having the above-described configuration, the following advantages can be achieved.

According to the invention as set forth in claim 1, the vehicle speed of the work machine can be changed by the operation of the shift lever 1. The operator can raise and lower the work device 3 with respect to the vehicle body by operating the lift switch 4 in a state of holding the grip 2 of the shift lever 1, and by operating the work switch 5. Transmission of this work device 3 can be interrupted. For this reason, the operation of raising and lowering the work device 3 from the vehicle speed shift to the work transmission is performed without changing the hand held by the grip unit 2 or by shifting, while performing the lifting and seedling transplantation operation. It is possible to increase operability through quick operation.

According to the invention as set forth in claim 2, the lift switch 4 is operated by pushing the up button 6 and the down button 7. Each time the pushing button 6 is pressed, the work device 3 is switched to the rising and stopping of the rising. At the time of raising, the work device 3 is continuously raised. Further, each time the lowering button 7 is pressed, the work device 3 is lowered and the stop is lowered. At the time of the lowering, the work device 3 is continuously lowered. In this way, each time the up button 6 and the down button 7 are pressed, the operation is switched to the up and down stop, the down and the down stop, respectively, so that these operations can be made accurately and easily. In addition, the ascending and descending strokes can be kept long in time, and rapid ascending and descending can be performed.

According to the invention as set forth in claim 3, the lowering button 7 can lower the work device 3, but each time the lowering button 7 is pressed when the work device 3 reaches the working position, The transmission of the work to the work device 3 can be intermittently switched to perform or stop the work. By the operation by the same lowering button 7 which lowers the work device 3, it can switch to work transmission and stop of electric transmission automatically as it descends to a work position, and operability can be improved.

According to the invention as set forth in claim 4, since the amount of protrusion at the grip portion 2 of the up button 6 and the down button 7 is changed, the operation feeling between the two buttons 6, 7 is different. Misoperation can be reduced by making the distinction between the button 6 and the down button 7 good.

According to the invention as set forth in claim 5, the raising button 6 is provided at the tip side of the grip portion 29 of the shift lever 1, and the lowering button 7 is disposed below the lifting lever. Corresponding to the same direction as the direction, the selection of the operation is made accurately, thereby reducing misoperation.

According to the invention as set forth in claim 6, the grip portion 2 of the shift lever 1 has a lower button 8 dedicated for lowering separately from the lowering button 7, thereby adjusting the position of the work start right next to the paddy field. Etc., it is possible to perform the switching of the lowering / stopping of the work device 3 by the simple operation by pressing and releasing the lower button 8, so that the delicate position adjustment can be facilitated and the operability can be enhanced.

In the invention according to claim 7, since the lower button 8 having a relatively low frequency of use is disposed behind the up button 6 or the down button 7, the misoperation can be reduced.

Claims (7)

Operation of a mobile agricultural machine, characterized in that a lifting switch 4 for elevating the work device 3 and a work switch 5 for performing work transmission are provided on the grip portion 2 of the shift lever 1. Device. The method of claim 1, The lifting switch 4 has an up and down button 6 which switches to an up and down stop every time it is pressed, and a down button 7 which is switched to a down and down stop every time it is pressed. Device. The method according to claim 1 or 2, The descending button (7), the operation device of the mobile agricultural machine, characterized in that to switch the interruption of the work transmission following the lowering to the working position of the working device (3). The method according to claim 1 or 2, Operating device of a mobile farming machine, characterized in that the amount of protrusion of the rising button (6) and the down button (7) is different. The method according to claim 1 or 2, The up button (6) is located on the tip side of the grip portion (2), the down button (7) operating device of a mobile agricultural machine, characterized in that disposed below the rise button (6). The method according to claim 1 or 2, The grip part (2) has a lower button (8) which lowers by pressing and stops lowering by releasing the pressing. The method according to claim 1 or 2, The lower button (8), the operation of the mobile farming equipment, characterized in that arranged behind the rising button (6) and the down button (7).