SE525487C2 - Equipment for agricultural implements and a method for controlling the functions or movements of an agricultural implement - Google Patents

Abstract

The machine is pulled by a tractor to apply agricultural operations to depth (d) between the surface rolling roller (8) and the tools ((10,12) which is measured (58) and controlled by signals to a control unit and actuators (48,50) to maintain the depth.

Description

o oo oooo oo oo o o o_ ooooooo I o ooo oooo 0 oooo 0 oooo oo IO OOOI II o I o 0 O 0 Oo I 10 15 20 25 30 35 40 45 50 (_51 Fm) b "'I fi: C.) sgä] 2 šII = = 'i 3 oooo interrupt the seed removal, thereby enabling the selection of a relatively high position at the start of the discharge in order to have time to fill the system before the seed beetles enter their working position and a relatively low position at the stop of the discharge to reduce the headland.

A device and a method according to claims 3 and 7 also control other functions which can also be advantageously related to the sowing depth, namely the marker for the desired driving position for the tractor and the track marking hatches or the like, since these two functions are usually activated or deactivated at headlands. up.

Claims 4 and 8 use the hydraulic cylinder used to control the height of the tool for the measurement. In this way, it is possible to effectively utilize a partially existing and relatively well-protected device which nevertheless indirectly represents a tool depth.

The further features and advantages of the invention are described in more detail below with the aid of an exemplary embodiment and associated features.

Figure description Figure 1 shows a seed drill pulled by a tractor.

Figure 2 schematically shows some of the components of the seed drill.

Figure 3 shows a diagram of the control of certain functions.

Description of an example Example Figure 1 shows a seed drill 2 pulled by a tractor 4. The seed drill 2 comprises one or more frame sections 6. At the frame section 6, tool units in the form of seed beetles or nozzles 12 are arranged to guide seed into grooves occupied by disc tools 10 (shown best of fi gur 2). The seed is led from a seed hopper 14 via one or more of the distributor heads 16 and hoses 20 out to the seed beetles 12. A support wheel unit 8 is arranged behind the frame section 6. The support wheel unit 8 carries a large part of the weight of the seed drill 2, and is also used to repack and level the grooves. Furthermore, there are two markers 22, of which only the left one is activated. The cursor is used to make it easier for the operator to select the correct lateral position.

Figure 2 schematically shows some of the components of the seed drill. Here it is possible that the support wheel unit 8 is mounted at a transverse beam via a link arm 72. A hydraulic cylinder 24 with the cylinder side 26 mounted at the frame section 6 and the piston side 28 mounted at the beam 30 is used to move the tool units 10, 12 vertically between a raised transport position and a Figure 2 shows submerged working mode. When the tool units 10, 12 are to be lifted, the piston 28 is pushed out, the beam 30 being rotated clockwise relative to the frame section 6 around the pivot point 32. The link arms 72, 74 thereby lower the support wheel unit 8's support wheels relative to the frame section 6 and the tools 10, 12. from the ground 76.

The hydraulic cylinder 24 is fed from a pressure source 38 of the tractor via lines or hoses 36 and a hydraulic block 40 with a valve unit 42. The movement is controlled by a control lever 34 (or similar) in the tractor. The hydraulic system includes, inter alia, I CO IÛII OI CO I 0 0 0 0 0 0 l 0 gg 0 0 0 0 0 0 000 0000 0 0 0 0 0 0 0 0 0 0 0 0 gqgg 00 00 0000 00 0000 00 Q 00 0000 0 0 0 O 00 10 15 20 25 30 35 40 45 50 (S1 i ti) U 1 3 :.

C.) J also a hydraulic motor 48 for seed discharge and a hydraulic cylinder 44 for the markers 22. These are connected to the hydraulic block 40 via valve units 50 and 46.

The valve units 42, 46, 50 are controlled by a control unit 52 via signal lines 64, 66, 68.

The control unit 52 is arranged in the tractor and can also control additional functions.

Conveniently, a control panel 54 is connected, preferably integrated, to the control unit 52 so that the operator himself can control certain functions from the tractor.

Track marking hatches 18 are opened and closed by an electric servo 56 controlled by the control unit 52 via a signal line 78.

The construction of a wound machine described above is essentially known, and the inventive device and method are described in more detail below.

An inventive sensor 58 for steplessly or substantially steplessly measuring the height of the tool units 10, 12 above the ground 76 is arranged at the cylinder 24. The sensor 58 comprises a transmitter / receiver part 60, for example for ultrasound, arranged on the cylinder side 26 and a reactor 62 on the piston side 28. .

The sensor 58 thus measures the cylinder position or ejection position s of the cylinder 24 which, by geometric conditions, constitutes a function of the tool depth d relative to the ground 76. The sensor 58 provides input signals to the control unit 52 which can be translated there into a value of the tool depth.

The control unit 52 compares the input signal with certain reference values in its memory, and when the input signal coincides with any reference value outputs to one or more drive means, such as the valves 46, 50 or electric servo 56, for influencing any function or movement of the seed drill 2, such as start or stop of seed release, activation or deactivation of markers 22 or track marking valves.

According to the invention, the reference values are storable and selectable by the operator, who can thereby decide for himself at what height of the tools the various functions or movements are to be started or stopped or otherwise affected.

Figure 3 shows a diagram illustrating how different movements can be controlled.

The tool height is indicated by d where its upper end position is indicated by d; and its lower end position with d4. The lower end position can be set by the operator, either by mechanical constraints such as stop rings on the cylinder piston 28, or by programming in the control unit 52. The position where the tools reach the ground is indicated by do. In the example, the reference value for starting the seed discharge UP when immersing the tools is set to the value d; which occurs slightly before the ground level is reached. When raising the tools from the lower end position d., The reference value for stopping the seed discharge UA is set to 413, i.e. shortly after the light has started.

Here it can be advantageous that the control unit is dry-programmed to always interrupt seed discharge when lifting above the selectable value dg, in case the lowering movement is interrupted before it reaches d3.

According to the example, the reference value d also has; is used for both activation MP and deactivation MA of both markers and the track marking device. 00 0000 00 00 0000 00 U 0 IC I 0 0 0 0 0 0 0 0 00 00 00 0000 O v 0 00 0000 10 15 Ut I u Ut -us ”to -ll Furthermore, according to the example, it is required that the control unit is arranged to also detect direction of movement in addition to specific positions.

It is also advantageous if the styrene lead is also arranged with memory, in a manner known per se, where it is possible to specify in which sequence markers and track marking devices are to be activated or deactivated.

The invention can be varied within the scope of the patent claims. It can, for example, be applied to other types of agricultural machinery where the tool height is a suitable parameter for initiating other functions. Furthermore, it is conceivable that the drive means of the various functions are designed in alternative ways. The sensor can be replaced with other sensor types that can measure distances substantially steplessly. Furthermore, the sensor can measure a distance directly towards the ground, or as in the example an indirect distance or angular change that constitutes a clear function of the tool height. Furthermore, the sensor does not have to be contact-free but can be, for example, a potentiometer. However, the described embodiment is preferred because it can be arranged relatively protected against damage and soil or other dirt that can affect the measurement result.

Claims (8)

10 l5 20 25 30 35 U: (Ti .f _) G1 4 :. C 3 * <1 Patent claim Device in agricultural implements (2) comprising at least one tool (10, 12) movable in height, where the movement is effected by a drive means (24, 38, 42), characterized in that a sensor (58) is arranged to directly or indirectly substantially steplessly measuring the height (d) of the tool (10, 12) relative to the ground, that the sensor (58) is connected to a control unit (52) arranged to give an output signal to at least one drive means (48, 50) depending on the tool height (d) 44, 46; 56) for influencing at least one arm movement (UA, UP, MA, MP) or movement of the agricultural implement (2), and that the relationship of the output signals to the tool height (d) is selectable and storable by an operator via a control unit (52) connected or integrated control panel (54). Device according to claim 1, characterized in that the tool consists of a seed beetle (12) or a wound piece and that output signals control at least the start (UP) and stop (UA) of seed extraction. Device according to claim 2, characterized in that output signals further control at least activation (MP) and inactivation (MA) of marker and track marking devices (22, 18). Device according to one of Claims 1 to 3, characterized in that the sensor (58) is arranged to measure the cylinder position of a hydraulic cylinder (24) constituting drive means for the movement of the tool (10, 12). 5. A method of controlling the functions or movements of an agricultural implement (2) comprising at least one tool (10, 12) movable in height, the movement being effected by a drive means (24, 38, 42), characterized in that with a sensor (58) directly or indirectly substantially steplessly measures the height (d) of the tool (10, 12) relative to the ground, to provide input signals representing the tool height (d) to a control unit (52) which compares the input signal with at least one reference value (dz, d3), that when the input signal coincides with the reference value (dg, dg) give an output signal to at least one drive means (48, 50; 44, 46; 56) for influencing at least one other function (UA, UP, MA, MP) or movement of the agricultural implement (2 ), which reference value (dg, d3) is selectable and in the control unit (52) can be stored by an operator. Method according to Claim 5, characterized in that the tool consists of a seed drill (12) or a seed nozzle and in that output signals control at least the start (UP) and stop (UA) of seed extraction. Method according to claim 6, characterized in that output signals further control at least activation (MP) and inactivation (MA) of marker and track marking devices (22, 18). Device according to one of Claims 5 to 7, characterized in that! of measuring the cylinder position of a hydraulic cylinder (24) constituting the driving means of the movement of the tool (10, 12).