JP3313561B2 - Rolling / elevating operation structure for ground work equipment of agricultural work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground control device for lifting and lowering and rolling freely with respect to a traveling machine body, and in a rolling control mode for maintaining a rolling posture of the ground control device at a target posture, the ground control device is provided. Control means for providing an adjustment operation tool for changing and setting the target posture and a mode selection operation tool for selecting a control mode, and for controlling driving of a ground working device in response to an operation command from the adjustment operation tool and the mode selection operation tool The present invention relates to a rolling / elevating operation structure for a ground working device of an agricultural work machine provided with the above.

[0002]

2. Description of the Related Art Even a farm work machine having a device for automatically rolling a ground work device is operated, for example, due to a failure of a device for controlling such a device, for example, a position setting device or an angle sensor described later, or In some cases, it is necessary to perform a rolling operation or an up-and-down operation of the ground working device for maintenance work. In consideration of such a case, as shown in FIG. 3, the extension solenoid 24A of the lift rod extending / contracting solenoid valve 24 for controlling the rolling operation is operated so that the manual operation is performed without the intervention of the control device as the control means. A rolling changeover switch 25 for selecting the shortening solenoid 24B, and an ascending solenoid 26 for the ascending and descending solenoid valves 26, 26 of the lift arm responsible for the ascending and descending operation.
A, an ascending and descending changeover switch 27 for selecting the descending solenoid 26B is connected in parallel, and both changeover switches 25 and 27 are connected.
There is a device provided with a rolling up / down selection switch 28 for selecting the selection. With the above configuration, each of the above-mentioned switches can be used only in the manual forced operation, so that including switches necessary for automatic rolling control etc., the number of installed switches becomes large, The device configuration becomes complicated. In order to eliminate the complexity of such a device configuration, an operation means as shown in FIG. 4 is provided. That is, in the rolling control mode, a push button type right down switch 20B and a left down switch 20C as adjustment operation tools for setting the target posture of the ground working device.
The inclination angle of the ground working posture, which has been the reference target posture of the rolling control, is changed by the push button switch 20.
B and 20C are operated to change to a lower right posture or a lower left posture, and the rolling control is performed at the inclination angle of the new changed posture. In order to use these two push buttons 20B and 20C also as a button for lifting and lowering the ground working device,
A position holding type (toggle type) changeover switch 20A is provided as a mode selection operation tool. With such a configuration, the rolling control mode and the manual lifting / lowering mode can be selectively selected by selectively operating the changeover switch 20A, and the two push button switches can be selectively operated in each mode. Thereby, in the case of the rolling control mode, it can be forcibly operated to one of the rightward and leftward downwards, and in the manual elevating mode,
Forcible operation can be performed either on the ascending or descending sides.

[0003]

By adopting the above configuration, the push button switch can be used in both modes, so that the switch can be used for both purposes. However, it is checked which mode is selected by the changeover switch. In such a case, the ground work device is rolled and the user may inadvertently move the ground work device up and down, so that the workability is not good. Therefore, a configuration is adopted in which the connector is used as a switch to switch between the rolling control mode and the manual lifting mode depending on the connection state of the connector with the control means, that is, when the connector is connected and disconnected. Even if is connected, if there is a disconnection etc., the mode will be the same as when disconnecting, so in this case also the ground work equipment may unexpectedly move up and down, completely avoiding such an unexpected situation I couldn't.

[0004] It is an object of the present invention to provide an apparatus which does not inadvertently move up and down when rolling a ground working device.

[0005]

[Means for Solving the Problems] [Structure of Claim 1 ] The structure of Claim 1 relates to a structure in which the vehicle body can be lifted and lowered and rolled freely.
Provide a ground work device and adjust the left and right inclination angles of the ground work device.
Rolling control mode that maintains the set tilt angle
Adjustment tool to change and set the set tilt angle, and the control mode.
A mode selection operation tool for selecting a mode, and
And the ground selection device by the operation command of the mode selection operation tool
Of agricultural work equipment provided with control means for controlling the driving of
In the rolling equipment and lifting operation structure,
Consists in configuring. Mode selection operation configured as reset type
Operate the starter while operating the implement to start the farm work machine.
Control, the control mode of the control means changes to the manual elevating mode.
Set in the manual lift mode.
When the reset operation device is operated, the ground operation device is raised and lowered.
It is configured to perform a descending operation.

[Operation] In other words, in order to switch the control means in the rolling control mode to the manual elevating / lowering mode, it is necessary to operate two operating tools, a starting operating tool and a mode selecting operating tool. The intention to switch to the manual lifting mode is required. In this case, when the vehicle is manually lifted and lowered, it is always operated with an intention, so that it is possible to prevent the ground work device from being raised and lowered unexpectedly.

[Effect] Therefore, the rolling operation of the ground working device and the manual lifting and lowering can be performed smoothly.

[0008] A second aspect of the present invention relates to the configuration of the first aspect, wherein a manual lifting and lowering module is provided.
When the mode selection operation tool is operated again in the mode,
The control mode of the control means is set to the rolling control mode.
It is configured so that:

[Operation / Effect] In other words, when switching from the manual elevating mode to the rolling control mode, it is only necessary to operate the mode selection operating tool again. The reason why such a simple operation is sufficient is that an unexpected rolling operation has a smaller effect on the worker than a lifting operation.

[ Structure of Claim 3 ] The structure of Claim 3 relates to the structure of Claim 1 or 2, and
In the lifting mode, the notification mechanism is configured to operate.
It is.

[0011]

[0012]

[Operation / Effect] In other words, a warning is issued so that the ground working device does not unexpectedly move up and down, and when the ground working device moves up and down, the worker should be alerted sufficiently. .

[0014]

FIG. 1 shows a rear part of an agricultural tractor, which is an example of a working vehicle, and is mounted on a transmission case 3 of a traveling body via a top link 1 and a pair of left and right lower links 2 which can swing up and down. Thus, a rotary tilling device 4 (corresponding to a ground working device) is connected. A pair of lift arms 6 driven up and down by a hydraulic cylinder 5 is provided on the upper part of the transmission case 3. The pair of lift arms 6 and the lower link 2 are lift rods 7, and a double-acting hydraulic cylinder 8. Are connected via

As a result, as shown in FIG. 2, the three-position switching type lifting / lowering control valve 16 for the hydraulic cylinder 5 is operated, and the entire rotary tilling apparatus 4 is raised / lowered by the hydraulic cylinder 5 and the lift arm 6. By operating a three-position switching type rolling control valve 17 for the hydraulic cylinder 8,
The rotary tilling device 4 is rolled around the connection point with the lift rod 7 by the expansion and contraction operation of the hydraulic cylinder 8.

The agricultural tractor includes a rotary tilling device 4
Of the automatic tillage control to keep the tillage depth constant by maintaining the tillage at a set height from the ground, the function of the position control to keep the height of the rotary tillage device 4 with respect to the aircraft at a set position, and the function of the rotary tillage device 4 A rolling control function for maintaining the left and right inclination angles at the set angle is provided.

As shown in FIGS. 2 and 1, the rotary tillage device 4 is provided with a rear cover 9 so as to be vertically swingable, and a tillage depth sensor 10 for detecting the vertical swing angle of the rear cover 9 with respect to the rotary tillage device 4. Is provided. Accordingly, the elevation control valve 16 is operated by the automatic tillage depth control so that the detection value of the tillage depth sensor 10 becomes the set tillage depth of the potentiometer type tillage depth setting device 11 provided in the body, and the hydraulic cylinder 5 is operated. The rotary tillage device 4 is automatically moved up and down by the lift cylinder 6.

As shown in FIG. 2, an angle sensor 13 for detecting the vertical angle of the lift arm 6 with respect to the machine body is provided at the base of the lift arm 6. The lift control valve 16 is operated by the hydraulic cylinder 5 so that the lift arm 6 is moved up and down by the position control so that the detected value of the angle sensor 13 becomes the target value set by the position setting device 12 provided on the body by the position control. Swing operation.

Therefore, when the rotary tilling device 4 is located above the ground, the operator operates the position setting device 12 to arbitrarily raise or lower the position of the rotary tilling device 4 with respect to the body by position control. Can be changed. When the rotary tilling device 4 is lowered to a position in contact with the ground by the position setting device 12, the state automatically switches to a state in which the automatic cultivation depth control is activated, and the detection value of the cultivation depth sensor 10 is set by the setting of the cultivation depth setting device 11. The rotary tillage device 4 is automatically moved up and down so as to reach the tillage depth.

As shown in FIG. 2, there is provided an elevating lever 18 which can raise and lower the rotary tillage device 4 to a predetermined height with respect to the body at a stretch.
It is operable at three positions, center and lower, and is urged to the center position. Thus, once the raising / lowering lever 18 is operated upward, the lifting / lowering control valve 16 is operated in preference to the above-described position control and automatic plowing depth control, and the rotary tillage device 4 is simultaneously raised to a predetermined height with respect to the body. Therefore, when the raising / lowering lever 18 is operated downward once, the rotary tillage device 4 is lowered to the original position, and returns to the above-described position control or automatic plowing depth control. In this case, there is provided a height setting device 19 for adjusting a predetermined height at which the rotary tillage device 4 is raised when the lifting lever 18 is operated upward. As described above, the detection results from the various sensors are transmitted to the control device 2 as control means.
1 to control the operation of the hydraulic cylinder 5 and the lift rod 7.

Next, the configuration of the rolling control function will be described. As shown in FIGS. 2 and 1, a stroke sensor 14 for detecting the amount of expansion and contraction of the hydraulic cylinder 8 and a weight-type tilt sensor 15 for detecting the right and left tilt angles of the body with respect to a horizontal plane are provided. Thereby, the right and left inclination angles of the rotary tilling device 4 with respect to the machine body can be detected based on the amount of expansion and contraction of the hydraulic cylinder 8. Of the rotary tilling device 4 with respect to the right and left can be detected.

A tilt setting means 20 is provided for setting the right and left set tilt angles of the rotary till 4 to be maintained with respect to the horizontal plane. The inclination setting means 20 is provided with three push buttons 20A, 20B, and 20C, and includes a horizontal button 20A, a lower right button 20B, and a lower left button 20C. Therefore, in the automatic rolling control mode, when the right lowering button 20B and the left lowering button 20C are individually operated, the hydraulic cylinder 8 continues to extend and contract while the operation is being performed, and the left and right setting of the rotary tilling device 4 is set. Change the tilt angle (target tilt angle). Rolling control is performed with the inclination angle at the time when the operation is stopped becomes the new target inclination angle. Lower right button 20B and lower left button 20
By pressing the horizontal button 20A instead of C, the absolute posture based on gravity can be returned to the basic posture as the target posture. The horizontal button 20A, the right lowering button 20B, and the left lowering button 20C can forcibly perform the rolling operation of the rotary tilling device 4 even in the manual control mode to change the rolling posture. Each button 2
While 0A, 20B, and 20C promote the slow operation of the lift rod 7 during the push operation, the lift rod 7 may be operated by a fixed amount each time the push rod is pushed.

Next, the control in the manual elevating mode in which the rotary tiller 4 is manually forcibly moved up and down will be described. The horizontal button 20A is also used as a mode selection operation tool for switching between the manual elevating mode and the rolling control mode, and the horizontal button 20A is configured as a momentary switch that returns to the original position when the pressing operation is released. In addition to the horizontal button 20A, a key switch 22 is provided as a start-up operation tool that starts up the engine of the agricultural work machine and starts up the overall control system including the control device 21. These two buttons, switch 20A,
When the engine is started while operating the button 22A by operating the button 22, the automatic rolling control mode can be switched to the manual lifting mode.

In the manual lifting mode, the rotary tilling device 4 can be forcedly raised and lowered by the right lowering button 20B and the left lowering button 20C.
In other words, by continuously pressing one of the buttons 20B or 20C, the forcible raising operation can be performed, and by continuously pressing the other button 20C or 20B, the forcibly lowering operation can be performed. Such a manual elevating mode is required when the angle sensor 13 for detecting the angle of the lift arm 6 or the position setting device 12 fails.
This is for manually adjusting the elevating amount. When the horizontal button 20A is operated again in the manual elevating mode, the manual elevating mode is released, and the mode returns to the automatic rolling control mode. Also, without operating the horizontal button 20A,
When only the key switch 22 is operated, the control mode is set to the automatic rolling control mode. Thereby, even if the button 20B or 20C is operated, the rotary tiller 4 does not unexpectedly move up or down. However,
In the manual elevating mode, the notification mechanism is operated so that the raising or lowering operation of the rotary tilling device 4 is not performed unexpectedly and the operator performs the operation with intention.

[Another Embodiment of the Invention] In the above-described configuration, the horizontal button 20A is also used as a mode selection operating tool, but it may be provided separately from the horizontal button 20A. When switching from the rolling control mode to the manual elevating / lowering mode, an operating tool other than the key switch 22 may be used as the operating tool that is operated simultaneously with the mode selection operating tool 20. Although the adjustment operation tools 20B and 20C are configured by two buttons, a single operation tool of a three-position switching type may be used. As the notification mechanism, a mechanism that emits a sound such as a buzzer is preferable, but a mechanism that blinks a lamp or the like may be used.

Incidentally, reference numerals are provided in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rear part of a agricultural tractor and a rotary tillage device.

FIG. 2 is a circuit diagram of a lifting operation system and a rolling operation system of a rotary tillage device.

FIG. 3 is a circuit diagram of a lifting operation system and a rolling operation system of a conventional rotary tillage device.

FIG. 4 is a circuit diagram of a lifting operation system and a rolling operation system of a conventional rotary tillage device.

[Explanation of symbols]

 4 Ground work device 20A Mode selection operation tool 20B, 20C Adjustment operation tool 21 Control means 22 Start-up operation tool

Claims (3)

(57) [Claims] A ground work device (4) is provided on a body so as to be able to move up and down and roll freely, and a left and right tilt angle of the ground work device (4) is set.
In a rolling control mode for maintaining each time, the setting
Adjustment operation tools (20B) for changing and setting the inclination angle , (20
C) and a mode selection operation tool (20) for selecting a control mode.
A), and a control means (21) for driving and controlling the ground working device (4) according to operation commands of the adjustment operation tools (20B) and (20C) and the mode selection operation tool (20A) is provided. a ground working device rolling elevation operating structure of certain agricultural machine, when activated causes the agricultural machine by operating the start operating member (22) while operating the configured the mode selection operation member (20A) to the return type The control mode of the control means (21) is
In the manual elevating mode, the adjusting operation tool (20) is configured to be set in a dynamic elevating mode.
By operating B) and (20C), the ground working device
(4) It is configured so that the raising operation and the lowering operation are performed.
Ground work apparatus rolling elevation operating structure of the agricultural machine are. 2. In the manual lifting mode, when the mode selection operating tool (20A) is operated again, the control
The control mode of the step (21) becomes the rolling control mode.
The rolling / elevating operation structure for a ground work device of an agricultural work machine according to claim 1, wherein the structure is configured to be set . 3. A notification mechanism in the manual lifting mode.
The rolling / elevating operation structure for a ground work device of an agricultural work machine according to claim 1 or 2, wherein the structure is configured to operate.