JPS59166005A - Riding type cultivator - 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 present invention is that the tilling device is fully connected to the traveling machine body via a three-point link IT consisting of a top link and a pair of left and right lower links, and is attached to the traveling machine body so that it can be driven up and down. The left and right lift arms and the lower links are connected via a lift rond, and a lift rod driving telescoping mechanism is interposed in one of the left and right lift ronds, and the front of the tilling device is tilted to the ground in the lateral direction of the machine body. The present invention relates to a riding cultivator that is provided with a tilt sensor that detects metal and is equipped with a horizontal control mechanism that fully automatically operates the telescopic mechanism so as to maintain the tilt state detected by the tilt sensor within a power setting range.

In the above-mentioned tiller, if the left and right 7 trods are the same length, the tiller will be parallel to the traveling machine body, but if the lengths of the left and right lift arms differ due to the operation of the lift rod telescopic rock ta, As a result, there is a difference in the vertical swing angle of the left and right lower links, and one of the two side parts of the tilling device is closer to the traveling body than the other. If the posture of the device is tilted, the tilling width changes, and the lift rod extension mechanism is activated frequently during traveling, the tilling marks σ will change as the tilling width (L) changes, as shown in Figure 5. ] becomes wavy, and when plowing adjacent fields, the overlapping plowing width must be made relatively large in order to fully heat the remaining tillage depressions. In addition, when the boundary between cultivated land and uncultivated land (no) is used for the entire tilling operation, the wavy boundary (B) ``Due to the water control section, undulations occur in the plowing trace, undulations at the boundary (B) are promoted, and there is a drawback that it becomes impossible to follow the operation. The purpose of the present invention is to enable tilling work to be carried out with the tilling width constant regardless of the tillage width.

In order to achieve the above object, the above-mentioned riding type cultivator includes a lower link drive extension on one of the left and right lower links! In addition to interposing a mechanism, in conjunction with the operation of the lift rod driving telescopic machine by the control mechanism, the lowering/reducing drive is configured to mow the tilling device in the machine traveling direction VC and maintain it in a steady posture. It is characterized by a posture correction mechanism that automatically operates the extension/contraction mi'.

The effects of the above configuration are as follows.

In other words, even if one of the left and right lateral sides of the tilling device approaches the traveling body more than the other in plan view due to the operation of the Lift Rond telescopic FRIt 4N, the entire lower link telescopic mechanism is installed on the approaching side. If it is possible to do so, extend it, and conversely, if you plan to install a telescopic structure for the lower IJ link on the other side, shorten the length of 7'71-, so that it is This prevents the tilling device from tilting. The effects of the above action are as follows.

In other words, it is possible to completely avoid changes in the tilling width of the tilling device caused by the operation of the lift rod extension mechanism, it is possible to reduce the overlapped tilling width with already cultivated land when cultivating adjacent land, and it is possible to reduce the overlapping tilling width when cultivating adjacent land. It has become possible to carry out plowing work more efficiently by traveling less distance and in a shorter time than before. Especially,
The boundary between the uncultivated land and the cultivated land becomes almost a @ line, and adjacent cultivation can be carried out in accordance with the boundary, which is extremely useful for unmanned cultivation work.

Hereinafter, examples of the present invention will be described in detail based on illustrative drawings.

A three-point link assembly (3) consisting of a top link (1) and a pair of left and right lower links (2), C2) is connected to the rear of the running transparent body, and a rotary tiller (4) is connected to the full valve. , a single-acting hydraulic cylinder (5) is driven by a lift arm (6), which can swing vertically (6), and a left and right lower link (2), (2) is a lift arm (7),
(8) A riding-type cultivator is constructed by connecting the
ing.

Both lift rods ('7) and (8) are composed of double-acting hydraulic cylinders (hereinafter referred to as lift rod cylinders) as an example of lift rod telescoping mechanisms. The height of the left and right lower links (2) and (2) can be changed by expansion and contraction, and the left and right tilting posture of the rotary tiller (4) can be changed and adjusted. The first one detects the tilt condition.
A sensor (9) is provided for detecting the horizontal tilt state of the tiller (4) relative to the traveling machine body (and a second sensor for detecting the amount of expansion and contraction of the lift rod cylinder (8)).
Sensor 00 is installed, 1st and @2 sensors (9)
According to the detection results of αQ, the tiller'Vj sound (tilt sensor 0] is configured to detect the tilt state of the hard body in the horizontal direction relative to the ground). Based on this, a non-horizontal control mechanism is configured to automatically operate the lift rod cylinder (8) to maintain the rotary tiller (4) in a horizontal position almost parallel to the ground. Details are given below.

That is, as shown in Figure 2, the hanging bell? the first sensor (9) configured as a rotary potentiometer;
The detection signal from is input to the calculation circuit 03, and the amount of expansion and contraction of the lift rod cylinder (8) required to level the rotary tiller N (4) is calculated as the target control amount (L.). Then, this target control amount (Lo) and the detection signal (vt) from the @2 sensor GO are input to the control circuit 04) to determine whether or not control is necessary and the control direction. Based on the determination results, the lift A command signal is input to the drive circuit OQ of the electromagnetic control valve αQ for the rod cylinder (8).
, the lift rod cylinder (8) is operated to expand and contract in accordance with the target expansion and contraction amount.

A double-acting hydraulic cylinder a is installed on one of the left and right lower links (2), <2) as an example of a lower link telescoping mechanism.
A force is inserted, and by expanding and contracting these two cylinders, the posture with respect to the cultivating table 16 (4) n running gluteal body in plan view can be changed and adjusted.

An angle sensor Qi is provided on the top of the rotary case 0-yen to detect the relative angle in plan view between the rotary case α mark and the top link (1). Based on the detection result by the angle sensor 09, the lower link cylinder α
i The attitude correction mechanism operates automatically and is linked to the operation of the lift rod cylinder (8) to maintain the tilling device (4) in a special electric attitude with respect to the aircraft traveling direction. It is structured as follows.

That is, as shown in FIG. 8, the signal from the angle sensor θ and the signal from the upper and lower limit setter (21) are input to the upper and lower limit comparators (C) and (C), respectively. Based on the comparison result, a command signal is input to the drive circuit of the electromagnetic control valve (a) for the lower link cylinder (171), and the relative angle between the top link (1) and the rotary case Q barrel is within the set range. The cylinder σ force for the lower link is automatically operated when the power is maintained.

Therefore, regardless of the expansion and contraction operation of the lift rod cylinder (8) for maintaining the tilling device (4) in a horizontal position,
The attitude change of the tilling device (4) with respect to the traveling machine body in plan view due to the expansion and contraction operation is suppressed, and as shown in Fig. 4,
It is possible to cultivate at almost constant Ii yuno.

The lift rod expansion mechanism (8) includes, for example,
The lift rod is divided into two parts, and an internally threaded cylindrical body driven by a hydraulic motor or an electric motor is attached to one half so that it can only rotate freely.The other lift rod is screwed into the cylindrical body, and the cylindrical body rotates. Various structural deformations, such as expansion and contraction, are possible.

Further, as for the lower link telescopic mechanism αη, various structural modifications are possible, such as dividing the lower link into two and constructing it in the same manner as in the lift rod telescopic mechanism (8).

Before fully configuring the posture correction mechanism (e), first find the relative relationship between the amount of expansion and contraction of the lift rod expansion and contraction mechanism (8) and the change in force of the tilling device (4) with respect to the traveling machine body accompanying the expansion and contraction mechanism (8). , by using the relative relationship, and based on the amount of expansion and contraction of the second sensor (IQ), determine the target expansion and contraction Nk of the lower link (2), which is used to eliminate the attitude change of the tilling device (4) with respect to the traveling aircraft.
Various modifications are possible, such as fully operating the lower link expansion/contraction mechanism αη so that the extensometer of the lower link (2) approaches the target expansion/contraction amount.

To configure the temporary horizontal control structure 0■, install a tilt sensor (b) that uses flow in the tilling device (4) so that the tilt state detected by the tilt sensor θυ is maintained within the set range. The lift rod extension mechanism (8) may be operated fully automatically.

The invention is also applicable, for example, to a case where a plow is installed in place of the rotary tiller (4) and all leveling and tilling work is carried out.

[Brief explanation of the drawing]

The drawing shows an example of the riding type Koyoshi according to the invention, and is the first example.
The figure is a perspective view of the main parts, Figure 2 is a block diagram showing the horizontal control 4, Figure 3 is a block diagram showing the attitude correction mechanism, Figure 4 is a block diagram showing the horizontal control 4,
The figure is a plan view showing the entire vegetable preparation state, and FIG. 5 is a plan view showing the conventional vegetable preparation state.

Claims (1)

[Claims] A three-point linkage device (3) consisting of a top link (1) and a pair of left and right lower links (2), (2) is provided on the traveling aircraft body.
), the left and right lift arms (6) are connected to the tilling device (4) and are attached to the traveling machine so that they can swing up and down. (6) and the lower links (2) and (2) are connected through the lift ronds (7) and (8), respectively, and a drive telescopic drive for the lift rod is attached to one of the left and right lift ronds (7) and (8). The mechanism (8) is a valve device, and an inclination sensor α1) is provided for detecting the inclination state of the tiller i"ii (4) relative to the ground in the left-right direction of the aircraft body, and the inclination state detected by the inclination sensor (6) is also provided. A riding power cultivator fully equipped with a horizontal control mechanism (6) that automatically operates the telescopic mechanism (8) to maintain the entire setting range 1, the left and right lower links (2), C2. A pivot telescoping mechanism αη for the lower link is interposed on one side of the lower link, and the tilling device (4) f: A riding power cultivator, which is equipped with an attitude correction mechanism holder that automatically operates the lower link driving extension/contraction mechanism αη so as to maintain a specific attitude with respect to the machine running direction.