JPS63177706A - Detector in agricultural tractor - 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 [Industrial Application Field] The present invention relates to a detection device for an agricultural tractor that is capable of detecting draft force and working depth using a single detection sensor.

[Prior Art and Problems to be Solved by the Invention] In general, this type of agricultural tractor uses a rotary tiller for tilling work, and a plow machine for tilling work. The machine will be installed as a working part. When working in the field with these working parts installed, the working depth is controlled by receiving the draft force from the working part by the swinging displacement of the top link bracket, as in the case of using a plow work machine, and the amount of displacement In some cases, the amount of rocking displacement of the leveling plate, which oscillates according to the tilling depth (working depth), is detected by a sensor, such as when using a rotary tillage machine. In some cases, the detection is performed based on the detection result. However, in the past, when performing these draft detection and when performing working depth detection, dedicated sensors were required for each, which resulted in a large number of parts, and the input side that inputs the detection signal was also Since a dedicated input port is required, a large-capacity one is inevitably required, resulting in high costs and other problems.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a detection device for an agricultural tractor that can eliminate these drawbacks. A detection sensor is connected to the top link bracket, which is displaced by the draft force from the top link bracket, in such a way that the displacement detection can be canceled. The present invention is characterized in that the pressure response means and the detection sensor are configured to be interconnectable via a coupling means, so that draft force detection and working depth detection can be performed with a single detection sensor.

With this configuration, the present invention enables draft force detection and working depth detection to be performed with a single detection sensor.

[Embodiment] Next, an embodiment of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a traveling body of an agricultural tractor, and a lifting link mechanism 2 is provided at the rear of the traveling body 1, and as described later, a working part of a rotary plowing machine 3 or a plowing machine 4, etc. It is possible to select and install them as needed. The attached working parts are moved up and down by the up and down movement of a lift arm 6 extending from the hydraulic case 5, as is conventional.

A bracket 8 is protruded from a pedestal 7 that is integrally attached to the rear surface of the hydraulic case 5.

A lower portion of a substantially U-shaped top link bracket 10 is swingably supported on this bracket 8 via a support shaft 9. And this top link bracket 1
0, a top link 2a is pivotally connected to the top link 2a by a pin shaft 10a. On the other hand, reference numeral 11 denotes a bullet formed in the form of two laminated plates, and the lower end of the bullet 11 is located on the lower end side of the 1-tube link bracket 10, with an appropriate gap between the plate surface and the pedestal 7. In this way, it is fixed as one piece. The face plate of this ammunition machine 11 comes into contact with the bottom plate face part 10b of the top link bracket 10, and urges the top link 2a backward, that is, toward the side receiving the draft force, so that the plow work machine 4 When towing work is performed by the plow machine 4, the top link bracket 1o receives the draft force from the plow machine 4 by swinging against the biasing force of the ammunition 11.

Further, reference numeral 12 denotes a sensor bracket that is integrally provided on the side of the base 7, and a detection sensor 13 is integrally attached to the sensor bracket 12. This detection sensor 1
The base end of a sensor arm 13b is fixed to the sensor shaft 13a of No. 3 with a bolt. On the other hand, reference numeral 14 denotes an actuation arm, the middle part of which is pivotally supported by a pin shaft 15 provided at the tip of a support bracket 15a installed on the side of the pedestal 7, and one end part of which is attached to the top. The actuating pin protruding from the side of the link bracket 10 overlaps Oc on the inside (on the front side of the machine body). However, the actuating arm 14 is always urged toward the side where it comes into pressure contact with the actuating pin 1°C by the accumulated force of the torsion bomb 15b.

Further, a pin 14c is provided protruding from the other end of the actuating arm 14, and this pin 4c is connected to the sensor arm 13.
The brackets 1 to 10 and the detection sensor 13 are interlocked and connected by loosely fitting into the notch groove 13c provided at the tip of the bracket 1. As described above, the operating arm 14 swings about the pin shaft 15 as a fulcrum due to the operation of the operating pin 10c accompanying the swinging displacement of the top link bracket 10 in response to the draft force from the plow working machine 4. The detection sensor 13 detects the swing angle of the sensor arm 13b connected to the sensor arm 13b (for example, detects a change in resistance value as a potentiometer).
3 can detect draft force, and in this way the top link bracket 10 and the detection sensor 13
are connected.

On the other hand, 16 is a lock body swingably attached to a pin shaft 16a protruding from the pedestal 7, and the lock body 16 is a top link bracket that is unnecessary when the working part is the tilling machine 3. The top link bracket 10 is locked by restricting the swinging of the top link bracket 10, and the top link bracket 10 is locked by operating the top link bracket 10 to the lock position where it is pressed against the guide 10d of the top link bracket 10, as shown in FIG. It has become so. When the top link bracket 10 is locked, the actuating pin 10c also becomes immovable, but the actuating arm 14 sets the state in which it is in contact with the actuating pin 10c as one limit value (for example, zero value), and the torsion bomb 15b Thus, in this embodiment, a releasing means for releasing the linkage between the top link bracket 10 and the detection sensor 13 is configured.

Reference numeral 17 denotes a connecting wire, and one end of the connecting wire 17 is detachably attached to a connecting pin 14d protruding from the other end of the operating arm 14.

Further, a rear cover 3a (a leveling plate, which corresponds to the working depth responsive means of the present invention) is provided to be oscillated in response to the tilling depth (working depth) of the tilling machine 3. The rear cover 3a and the detection sensor 13 can be linked together in this manner. Then, as the rear cover 38 swings following the tilling depth of the tilling machine 3, the actuating arm 14 swings due to the continuous pulling action of the connecting wire 17, and thereby the detection sensor 13 can also detect the tilling depth. It looks like this.

In the embodiment of the present invention constructed as described above, when the working part is the plow working machine 4, the locking body 16 is in the non-locking position as shown in FIG. 3, so that the top link bracket 10 can be oscillated. When plowing work is performed in this state, the top link bracket 10 receives the draft force from the plow work machine 4 and swings against the biasing force of the ammunition 11, and the swinging action of the operating arm 14 linked to this swings. Draft force is detected by the movement, and automatic draft control of the plow work machine 4 is performed based on this detected value.

On the other hand, when the working part is the tilling machine 3.

By locking the top link bracket 10 with the lock body 16 and connecting the rear cover 3a and the actuating arm 14 via the connecting wire 17, the rear cover 3a and the detection sensor 13 are in a linked state, and therefore the detection sensor 13
The tilling depth is also detected based on the rocking motion of the actuating arm 14 corresponding to the rocking change of the rear cover 3a accompanying the change in tillage depth, and the tilling work machine 3 is activated based on this detection result.
This means that automatic deep control will be achieved.

In this way, in the present invention, when the working part is the plow working machine 4, the draft force can be detected and automatic draft control can be performed, and when the working part is the tilling working machine 3, the tilling depth can be detected. Although automatic plowing depth control is possible by using a single detection sensor 13, draft force detection and plowing depth detection can be performed effectively using a single detection sensor 13. Therefore,
The two types of detection sensors that were necessary in the past are now completely unnecessary, allowing parts to be used for multiple purposes and reducing the number of parts. , the input ports for inputting the detected values can also be shared, so the number of input ports can be reduced in the control section.
In some cases, a vacant input port can be used as an input port for separate data, reducing costs and contributing to the simplification of the control mechanism. Furthermore, in this case, since both the draft control and the plowing depth control are related to the automatic elevation movement control of the working section, there will be no problem even if they are made common in this way.

Furthermore, since this detection sensor 13 is provided on the top link bracket 10 side and is not provided in the hydraulic case as in the past, these components including the detection sensor 13 must be assembled and installed as one unit. Therefore, it is possible to simplify the structure and greatly improve maintainability during assembly or inspection and maintenance.

Further, in this device, the draft force detection and plowing depth detection by the detection sensor 13 can be detected not only electrically but also mechanically.

In that case, mechanical detection can be performed using most of the members up to the actuating arm 14 as they are. That is, in the case of mechanical detection, the sensor bracket 12 is of course unnecessary since there is no detection sensor 13, and the actuation arm 14 is connected to the valve arm 20a on the hydraulic valve 20 side via the connection arm 19. By doing so, when performing draft control, the swinging displacement of the top link bracket 10 that receives the draft force from the plow work machine 4 is transmitted through the operating arm 14 and the connecting arm 19. performs switching control of the hydraulic valve 20;
On the other hand, when controlling the plowing depth, the amount of change in the swing of the rear cover 3a controls the switching of the hydraulic valve 20 via the connecting wire 17, the operating arm 14, and the connecting arm 19, thereby controlling the draft control or the plowing depth. will be accomplished. As described above, in the case of this embodiment, the operating arm 14 and the connecting arm 19 in the case of mechanical detection are
In addition to simplifying the structure by effectively combining parts of the detection mechanism such as In this case, it is possible to ensure the commonality of parts, which is extremely convenient not only in terms of product assembly but also in terms of maintenance. Become.

Furthermore, in this device, when the agricultural tractor is subjected to the above-mentioned electrical detection control, the detection sensor 13
is provided directly on the top link bracket 10 side, but its setting device 21 is provided on a side control panel 23 placed on the side of the seat 22 (right side in the embodiment), and is used for control switching. The switch 24.24a and the monitor lamp 25.25a are provided on the operation panel 26 in front of the seat. By configuring it in this way, the structure of the detection mechanism can be simplified, while the draft control can be carried out at a deeper working depth. , plowing depth control (common to all cases) can be set using the side control panel 23, so the operator can hardly change his or her working posture, and these controls can be set and checked from the front operation panel. 26, it can be done immediately, and erroneous operations can be avoided as much as possible, and field work can be done reliably and accurately.

[Operations and Effects] In summary, the present invention is constructed as described above, so the detection sensor can detect the draft force by being connected to the top link bracket side, and by releasing this connection, the detection sensor can detect the draft force by connecting it to the top link bracket side. By linking it with a depth responsive means, it is possible to detect the working depth. Therefore, the two types of dedicated detection sensors that were conventionally necessary to detect draft force and working depth are no longer necessary, and only one type of detection sensor is required. On the side of the control unit that inputs the information, the input board is no longer necessary, which not only greatly reduces the number of parts and greatly simplifies the structure, but also reduces costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the detection device for an agricultural tractor according to the present invention, and FIG. 1 is a plan view of the agricultural tractor, and FIG. 2 is a side view of the agricultural tractor when a tiller is attached. Figure 3 is a side view of the agricultural tractor with a plow installed, Figure 4 is a plan view of the operation panel, Figure 5 is a plan view of the side control panel, and Figures 6A and B are Rear view and side view of the detection unit showing the draft detection state, No. 7
FIGS. 8A and 8B are a rear view and a side view of the detection unit showing a tillage depth detection state, and FIGS. 8A and 8B are a rear view and a side view of the detection unit showing a mechanical detection state. In the figure, 1 is a traveling machine body, 3 is a tilling machine, 4 is a plow machine, 10 is a top link bracket, 13 is a detection sensor, 14 is an operating arm, and 17 is a connecting wire.

Claims (1)

[Claims] A detection sensor is connected to the top link bracket, which is displaced by the draft force from the working part, in such a way that the displacement detection can be canceled, and a sensor is installed on the working part side so that the detection can be canceled depending on the working depth of the working part. Detection in an agricultural tractor, characterized in that the depth response means and the detection sensor are configured to be interconnectable via a coupling means, so that draft force detection and working depth detection can be performed with a single detection sensor. Device.