JPS59203404A - Tractor with rolling control mechanism - 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 provides a suspension support for suspending and supporting a lower link in a three-point link device for connecting a working device to a tractor with respect to a lift arm for lifting and lowering the working device. The working device is provided to be extendable and retractable for operation, and is based on information from a sensor that detects the horizontal inclination angle of the tractor with respect to a horizontal plane, and a sensor that detects the extended/contracted position of the suspension support. In order to maintain the left and right inclination angle with respect to the horizontal plane within the set range,
The present invention relates to a tofuctor with rolling control 'rfJHmV, which is provided with a control mechanism for automatically communicating and operating the hanging support.

When all working equipment is connected using a 3-side link device, the spacing between the left and right lower links may be changed to match the working equipment, but the working equipment is connected to one of the left and right lower links as a fulcrum. Since the rolling operation is performed while being oscillated, as the interval changes as described above, the amount of rolling operation associated with unit operation of the hanging support changes in such a manner that the larger the interval, the smaller the amount of rolling operation. Become something to do. For this reason, conventionally, the front of the machine is manually operated to correct the amount of expansion/contraction control of the suspension support as the tractor tilts by a unit angle. It is troublesome to have to perform the operation for control amount correction type 1 every time, and there is also a risk that proper control may not be performed due to forgetting the operation.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to enable proper flow control at all times without requiring special operations.

A characteristic configuration of the tractor with a rolling control mechanism according to the present invention is such that a mechanism for correcting the expansion/contraction control amount of the suspension support as the tractor tilts by a unit angle is connected to a pair of left and right lower links in the three-point linkage. The feature is that it is designed to be automatically operated based on information from a sensor that detects the interval.

Next, the effects of the characteristic configuration of the present invention will be described.

In other words, when the distance between the left and right lower links is changed, the expansion/contraction control amount correction mechanism is automatically operated based on the information from the distance detection sensor, and the expansion/contraction control amount of the lifting support as the tractor tilts is maintained in an appropriate state. It is intended to be done.

Therefore, even if the spacing between the left and right lower links is changed, it is possible to always perform good elevation control without requiring any special operations, resulting in -N good ((
A tractor with rolling control that can be used has been obtained.

Embodiments of the present invention will be described below based on the drawings.

As shown in Fig. 1, a pair of left and right working equipment fully connected lift arms f31, +31 are attached to the rear of a tractor with a driver's seat (2) installed between the left and right rear lift arms f11, (11). 4), and the rotary tilling gate +rq (71) is connected to the rear of the tractor so as to be movable up and down through a three-point link device consisting of left and right lower links!5+, +51 and top link ((+l). And a pair of lift arms f31, (31
, respectively, to the left and right lower links (51e (for 51,
The lift arm (8) and the return σ for rolling operation are each connected separately via a D-type fluid pressure cylinder (9), so that
The tilling device (7) can be driven up and down with respect to a tractor, and a riding type tiller that can be driven and rolled can be constructed as one.The rolling control mechanism will be described below.

As shown in FIGS. 1 and 2, a sensor (10) is installed at the rear of the tractor for detecting the horizontal inclination angle of the tractor with respect to the horizontal plane as a fluctuation in the voltage signal f(), and the double-acting type fluid pressure A sensor that detects the expansion/contraction position of the cylinder (9) as the tiller (7) relative to the rolling attitude of the tiller (7) and outputs the detection result as a voltage signal (0 fluctuation) (9)
It is attached to. Then, the tilt angle sensor (10
) Based on the signal (θ)VC from Arithmetic circuit θ that outputs a voltage signal (Lo)
It is determined whether the difference between the signal (Lo) from the signal (Lo) and the signal from the rolling sensor (first time) is within the dead band width (MuJl), and the operating direction of the double-acting cylinder (9) is determined. a discriminating circuit 03), a circuit θ east that generates a pulse signal based on information from the circuit θ, and a control valve for the double-acting cylinder (9) (for the country, shortening and extension operation circuit ge), AND circuits (tts) and (19) are provided to selectively operate (17), and thereby the horizontal inclination angle of tiller a iif (71) is maintained within the set range. Dynamic cylinder (
9) is configured to be telescopically operated.

However, the setting range of the horizontal inclination angle of the tiller B (71) with respect to the horizontal plane should be set to a range close to zero, so that the left-right tilted posture of the tiller 1 seated seat (7) can be maintained in a near-horizontal posture. be.

As shown in FIG. 3, a rod-shaped body (20b) equipped with a contact point that slides on the resistor is inserted freely into a cylindrical body (20a) having a single-gas resistor attached to the inner surface. A sensor using a linear movement potentiometer,
Installed across the left and right lower links (5), (5),
Left and right lower links (5).

The configuration is such that the interval (5) can be detected as a change in the direct pressure signal (D).

As shown in FIG. 2, in order to correct the expansion/contraction control amount of the cylinder (9) as the tractor tilts by a unit angle, a tilt angle sensor (10) is input to the arithmetic circuit (11J). A circuit I21) for changing the amplification rate of the signal in stages is connected to the arithmetic circuit (12I),
In order to switch the width increase rate changing circuit C21) to the width increase serious state when the lower link interval is equal to or greater than the set interval, and to the width increase rate small state when the lower link interval is smaller than the set interval, Interval detection sensor - configured to be automatically operated based on the ○ signal.

In short, the tilling device (7) is operated in a rolling manner using the joint with the lower link (5) to which the lift arm (8) is connected as a fulcrum, and as a result, as the distance between the lower links increases, As the cylinder (9) operates by a unit amount, the amount of rolling operation tends to decrease, but this is offset by the above-mentioned change in the amplification rate. As shown in the graph of Fig. 4, if the lower link interval is small, the target expansion/contraction position (Lo) of the cylinder (9) as the tractor tilts is indicated by the (Sl) line, and the lower link If the interval is large, it will be determined by the (-) line.
However, the signal of the tilt angle sensor (lO).

The target extension/contraction position fF\(Lo) is zero when the tractor is horizontal, negative when the tractor is tilted to the upper left position, and positive when the tractor is tilted to the left downward position.

The detection signal (D) of the spacing detection sensor (D) changes with the rolling operation, but the range of the change does not exceed the change in voltage caused by changing the lower link spacing.

In carrying out the present invention, in addition to the double-acting hydraulic cylinder (9), a threaded telescopic rod or the like which can be freely operated by an electric motor may be used, and these are referred to as a suspension support.

In addition to the low tillage device (7), books and planters are also available.
It can be applied to rolling control of work %J, etc.

In addition, as the expansion/contraction control amount correction mechanism, a tilt angle sensor (1
Amplification factor changing circuit X211 that corrects the detection signal (of
Various changes can be made, such as providing a circuit for correcting the detection signal of the detection sensor (Il) in addition to the extension/contraction position.

In addition, to detect the lower link interval, in addition to using the linear moving potentiometer type sensor (E) described in the embodiment, for example, as shown in FIG. The left and right lower links are connected to the pivot pin (251) by a ball joint, as shown in FIG. (5),.

(5) Potentiometers fl and j'J41 for detecting the left-right swing angle for each tractor are provided so as to be operated by the arm (24a) that swings together with the lift arm (6), and these potentiometers: 2ω, (
Various modifications can be made, such as calculating the interval based on the detection signal of the example, and these are collectively referred to as an interval detection sensor. In order to correct the expansion/contraction control amount based on the detection result, the correction may be made in two stages, three or more stages, or in a stepless manner. Incidentally, in order to perform stepless correction, in addition to detecting the lower link swing angle, for example, the linear movement type potentiometer (20) may be connected to the left and right lower links (5).
), (5) may be attached between the free ends to suppress the detection signal from changing due to the rolling operation, and to detect the interval between the rolling operations.

[Brief explanation of the drawing]

The drawing shows an example of a rolling system, 8 machines, and grooved tractor related to Mokuenmei.
Figure i821 is a 11" route diagram showing the specific configuration of the rolling control machine and groove, Figure 3 is a plan view showing the l7 section of the interval detection sensor, and Figure 4 is the extension and shore control. FIG. 5 is a plan view of another embodiment, and FIG. 6 is a plan view of another embodiment lA1. (3)...Lift arm, (5)...
Lower link, (7)... Working fluid 117, (9)
......Hanging support, (10)...Inclination angle detection sensor, (11)...Extension position detection sensor, 20+, , :"21, +;> 41...
...Interval, 1 moxibustion sensor, (21)...
Telescopic control amount correction machine rt￥. Chiku 1 cause

Claims (1)

[Claims] ■ A suspension support (9) that suspends and supports the lower link (5) of a three-point link device that connects the work device (7) to the tractor with respect to the lift arm f31K for lifting and lowering the work device. , a sensor (10) which is extendably provided to drive the working device (7) for rolling operation and which detects the horizontal inclination angle of the tractor with respect to the horizontal plane; and a telescopic position 1a of the suspension support (9). A sensor that detects (
Based on the information from each Ill, the working device (7)
A tractor with a rolling control mechanism is provided with a control mechanism that automatically expands and contracts the suspension support (9) so as to maintain the horizontal inclination angle with respect to a horizontal plane within a set range, the tractor being a unit A mechanism tall that corrects the expansion/contraction control amount of the hanging support (9) as the hanging support (9) is tilted;
A pair of left and right lower links +f in the three-point linkage device
A tractor with a rolling control mechanism that is provided to be automatically operated based on information from a sensor (a) or (72 or (to)) that detects an interval of il, +51. The tractor with a rolling control mechanism according to claim 0, which is a linearly movable potentiometer attached across the left and right lower links (5), (5). The tractor with a rolling control/mechanism according to claim 0, wherein the tractor is a potentiometer that detects the horizontal swing angle of each of the lower links (β, (2) with respect to the tractor).