JPS59187705A - Earth working vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The Kibo Ff4 has a steering clutch attached to the transmission system to the drive shaft of each of the left and right traveling devices, and a brake is attached to each of the left and right drive shafts. In contrast, in the initial stage of operation, only the steering clutch is disengaged and the brake is operated in the subsequent operation, and the seven hydraulic cylinders are interlocked and connected in a predetermined row of the attached work device. In addition to providing a direction sensor to detect the relative position M with respect to the 7th sen→? °- and an electromagnetic control valve that selectively supplies pressure oil to each of the left and right cylinders, the control valve is operated so that the position detected by the direction sensor is maintained within a set range. The present invention relates to a ground work vehicle that is equipped with a direction control mechanism that independently switches and plants, and in which a hand fill J steering operation tool is linked to the control valve via an electrical linkage mechanism.

When a work vehicle described in E is turned on a headland, the brakes are harder to apply in dry fields. In order to deal with these problems, turning is performed by repeatedly performing on/off operations (17), a so-called inching operation.

However, this is based on experience and intuition, and it may be difficult to turn at the desired turning radius, or you may make an unexpected sharp turn and damage the field, or you may have to check the braking force and repeat the operation manually to turn on or off. This has the disadvantage that it is cumbersome to operate.

The present invention provides a turning rl at a desired turning radius from the above point Km.
-11, easy to operate, 1. The purpose is to be able to do the following:

The present invention - In order to achieve the above object, the ground work vehicle described above is provided with a sensor for detecting brake operation pressure of the left and right cylinders. and, in the state of operation by the steering operation tool, the control valve is automatically repeatedly turned on and off so that the applied voltage detected by the pressure sensor is maintained within a setting range that is freely adjustable by a variable setting device. Turning radius -
All features include an electrification mechanism.

The effects of the above configuration are as follows.

In other words, the steering operation tool simply opens and closes the circuit that connects the RE electrical linkage mechanism 1, and if a dedicated town change setting device is installed separately, the brake in the case of a wet field. The setting range of the operating pressure is set to a small value, and on the other hand, in the case of dry fields, the setting range of the brake operating pressure is set to a large value.With V7, the set brake operating pressure is automatically obtained by repeatedly turning on and off the control valve. In addition, if a variable setting device is provided mechanically linked to the steering operation tool, the steering operation tool can be maintained at a position corresponding to the desired operating pressure to control dry fields, wet fields, etc. , [111 Depending on the nature of the field, the desired brake operating pressure or sliding/relaxing force 1 can be applied, and regardless of changes in the nature of the field, it is possible to turn on the headland with a constant turning radius.

The effects of the ten actions are as follows.

In other words, regardless of whether a dedicated variable setting device is provided or a variable setting device is provided mechanically linked to the steering operation tool, once the brake operating pressure is set, that state will be maintained. This eliminates the need to repeatedly operate the steering device to repeatedly turn on and off the control valve, making it easier to turn at the desired turning radius. It is now possible to turn smoothly without destroying the headland.

1 Below, embodiments of the present invention will be described based on illustrative drawings.

The blade 111v part (2) (+-, feed chain f+ ) is mounted on a traveling vehicle body equipped with left and right crawler traveling devices (4) + (4), which constitutes a combine harvester. 1. It is.

Left and right traveling device (4) (4) central drive shaft ffi! +
+5) The power from the engine (6) is transmitted via the smart speed mechanism (7) and the steering clutch (8). Further, a brake (9) is attached to each of the drive shafts (fil + f5).

Left and right clutches +8), t8+ and left and right brakes (
9) + (9) Seven hydraulic cylinders (10) are interlocked and connected in the center, and as the hydraulic cylinders (Itl+ and (III) each operate, the steering clutch (8) is activated at the initial stage of operation.
), and by tightening the brakes (9), the brakes (9) are operated.

In the reaping part (2) K, the weeding tool (11) is installed at the center of the object in the left and right directions. A direction sensor (15) + (lfi) consisting of a switch box (14) and a switch box (14) attached with a Based on this, the positional deviation of the cutting section (2) with respect to the stem culm row is detected.

The sensor f151 + (15'l) sends a command signal to the control unit (16) K input L, its input result r, and the hydraulic cylinder (10i + flo
) outputs a command signal to the electromagnetic imitation control valve (17'l), automatically changes the control valve (Iη to +'7I, and controls the reaping part (17'l) detected by the sensors (15) and (15).
The direction control mechanism (18) is configured so that the position of the grain culm row with respect to 2) is maintained within a set range. Note that the command signal output to the control valve (171) is a pulse signal.
When operating the direction control mechanism (18), the brake (9)
Instead of operating up to (9), the steering is done by only disengaging clutches (8) and (8).

Control unit) (161K, connected to a circuit with a switch (Igl + 69) as a steering operation tool. Front P, hydraulic cylinder (rule ν(10)
) A pressure sensor (20) is attached to detect the hydraulic pressure 1MK brake operation FE to each of them, and the signal from the immediate force sensor (20) is sent to the control unit f+6).
Configured to input K, and configured to input the signal from the control unit) (+61) to the pressure sensor (20), and set the pressure detected by K to be variable. The control valve (171) was repeatedly turned on and off in an automatic HrJ+ manner so as to be maintained within the setting range, and the brake operating pressure was kept constant at tπ, and the turning radius was kept constant. Turning radius to turn at -
This constitutes the electrification mechanism.

[Jchi, I won't go into details (!) Before starting work, judge the soil quality of the field, and if it's a dry field, increase the brake operating pressure, and...
If the humidity is 11, reduce the brake operating pressure to 1.
According to the characteristics of the rice field, the variable setting device (21) is adjusted to set the brake operating pressure l-, and as the brake operating pressure is selectively operated (depending on switch ++9) and *+q+, the pressure sensor The detected pressure from the brake control pressure is set by the variable setting device (21).
7) is maintained in the on state, and as the setting range is reached, the control valve (17) is switched to the neutral state, and oil is drained from the cylinder (10) as the switching occurs. The detected pressure from the pressure sensor (20) falls below the set range, but at the same time the control valve 0'7) is turned on again and its on/off operation is controlled by switch Q91.
, (repeat until +91 f is opened, and the brake operating pressure is automatically maintained within the set range.

The signal from the pressure sensor (fi) is sent to the switch f19.
Even if i + (19) is input, the timer circuit (4) delays the input to the control unit (16) by a set time, and when the clutch (8) is disengaged, the engagement between the clutch teeth is released. cylinder (10
) is higher than the pressure set in variable setting 18 (21), the pressure sensor (a) detects it and
This prevents malfunctions such as switching the control valve (17) to a neutral state, and allows the detected pressure from the pressure sensor (20) to be input to the control unit (16) only after the clutch (8) is securely disengaged. .

FIG. 3 shows all the embodiments of the expansion, and the steering operation tools include the above-mentioned switch Q9) + (swing operation lever force in place of each Setting 4 section 1) is interlocked and the lever 'n effect ('231
As you operate , the brake operating pressure is adjusted and set according to the amount of operation, and the brake is applied at the brake operating pressure within the set range [9! + (9) to obtain the desired turning radius.

Figure 4 also shows the steering operation tool and the swing operation lever (24).
[Another familiar example is shown, for the first contact for clutch operation (2θ, second contact for brake operation (26), third contact for grounding (b), and variable setting device (2)) A contact point (29) + (a)) for connecting the predetermined contacts of the lever (24) K is provided. Only the first contact (25) is connected to the third contact and grounded, and as the variable setting device (21) and the No. The set voltage is electrically linked to the input α force to the control unit (16) as the brake operating pressure through the variable setter needle, the control unit (16), and the solenoid of the control valve 07'l. to be called.

The present invention can be applied not only to combine harvesters, but also to various types of ground work vehicles equipped with various work devices (2) such as tillers, riding rice transplanters, etc.

[Brief explanation of the drawing]

The drawings show an embodiment of the ground work vehicle according to the present invention, FIG. 1 is a plan view of the main parts of the combine harvester, FIG. 2 is a circuit diagram showing the direction control mechanism, and FIGS. FIG. 3 is a side view of main parts of the embodiment. (2)...Working equipment, (4)...Traveling equipment, (5)...Drive shaft, (8)...
Steering clutch, (9)... Brake, (10)...
...Cylinder, (I5) ...Direction sensor,
07'l... Control valve, (18)... Direction control mechanism, (19 effect (2"it + f241...
・22-

Claims (1)

[Claims] A steering clutch (8) is attached to the transmission system to the drive shaft (5) of each of the left and right traveling devices (4) and (4), and an f brake (9) is attached to each of the left and right drive shafts (5). Installation 7,
With respect to the steering clutch (8) and the brake (9), only the steering clutch (8) is disengaged at the initial stage of operation, and the brake (9) is operated by subsequent operation. , 7 hydraulic cylinders (1
A direction sensor (15) is provided which interlocks the 0) and detects the relative position of the attached work device (2) to a predetermined row.
+ (10) The direction sensor (15
) is provided with a directional control mechanism (Kuni) that automatically switches and operates the control valve (I'71) so that the detected position by the control valve (I'71) is maintained within a set range; Manual steering operation tool f19) + 10%, (
24+ is connected to the ground work vehicle, wherein the left and right cylinders 1lnl, (10) a sensor (two members are provided) for detecting the respective brake operating pressures, and the pressure sensor (20) and the control valve 0'II are provided. In the operation state of the palm cutting tool 1-1 [7,:(i+ (241), the pressure detected by the pressure sensor (20) is set to be adjustable with the variable setting device button). The ground work vehicle is equipped with a constant turning radius mechanism that automatically repeatedly turns on and off the control valve (171) so as to maintain the control valve (171) within a set range.