BE1029599A1 - Drive system for a harvesting machine - Google Patents

Abstract

A drive system for a harvesting machine (10) comprises a control device (94) which is connected and configured in a signal-transmitting manner to a drive of a feed conveyor (22) and/or to a drive of a header (20), a reversing process of the feed conveyor (22) and/or or the header (20), the control device (94) being configured to specify the speed at which the header (20) and/or the intake conveyor (22) moves when reversing, depending on the operating conditions of the harvesting machine (10). .

Description

1 BE2022/0031

Drive system for a harvesting machine

Description

The invention relates to a drive system for a

Harvesting machine, comprising a control device which is connected and configured in a signal-transmitting manner to a drive of a feed conveyor and/or to a drive of a header, a reversing process of the feed conveyor and/or of the

to command the harvest header.

Technological background

Agricultural harvesters, in particular

Forage harvesters are used to harvest crops by means of a header

Picking up the soil of a field, possibly after it has been cut off, and processing it. For this purpose, the crop is through a

feeder into the harvesting machine, in which it is then further processed, e.g. chopped or threshed. At the

harvesting process it is possible that the harvesting operation will be interrupted if a sensor detects a blockage in the header or in the

intake conveyor detects, e.g. based on the drive torque, or a foreign body detector detects a foreign body in the harvested crop, e.g. a stone or a ferromagnetic material.

In such a case, after the response of the

Foreign body detector or clogging sensor automatically or on an operator input instead of a reversing to the

Dissolve constipation or remove the foreign body from the

To promote feeder or the header addition. For example, see the prior art according to US Pat. No. 4,496,105 A with automatic initiation of the reversing process, DE 10 2004 029 953

2 BE2022/0031

A1 with staggered activation of the reversing of

Harvesting attachment and intake conveyor, WO 2015/091567 A1 with sequential reversing of the transverse auger and

Prongs of a pick-up, DE 10 2017 214 097 A1 with automatic initiation and termination of the reversing process, and EP 1 151 660

A1, EP 1 862 057 A1 and EP 2 179 642 A1 with adjustable

Rotational speeds of those also used for reversing

Header and feeder housing drive motors referenced.

In the prior art it is thus known that

Automatically initiate and end the reversing process, which is what

makes work easier for harvester operators. The

However, the conveying speed of the header and the intake conveyor during reversing cannot be controlled automatically, but can at best be changed by operator input.

Task

The most appropriate speed for each

However, reversing of header and intake conveyor is dependent on certain conditions. This issue is addressed in the prior

technology is not adequately taken into account.

The object on which the invention is based is seen as an improvement over the prior art

Drive system for a harvesting machine and a corresponding one

provide harvester.

invention

The present invention is characterized by the

Patent claims defined.

A drive system for a harvesting machine includes a

Control device, the signal-transmitting with a drive of a

Feed conveyor and / or with a drive of a header

3 BE2022/0031 is connected and configured, a reversing process of

To command feed conveyor and / or the header. The

The control device is configured to specify the speed at which the header and/or the intake conveyor moves when reversing, depending on the operating conditions of the harvesting machine.

The operating condition may indicate whether a

Foreign object detector or a blockage sensor has responded.

The controller can thus be configured to

To command the reversing process when the blockage sensor responds more slowly than when the foreign body detector responds. As a result, the foreign body from the header is thrown forward out of the header and can be collected or left there while the

Harvest operations can be resumed quickly. One

Blockages, on the other hand, can be cleared more slowly, in particular with a

Header dependent speed.

The controller may be configured to

Only reverse the infeed conveyor when a speed sensor is on

reversing of the header has detected.

example

An exemplary embodiment of the invention is explained with reference to the illustrations. Show it:

Fig. leine schematic side view of a self-propelled

harvesting machine in the form of a forage harvester,

Fig. 2 is a schematic plan view of the drive system of

harvester, and

4 BE2022/0031

Fig. 3 is a flow chart, according to which the control device

Harvester is working.

FIG. 1 shows a schematic side view of a harvesting machine 10 in the manner of a self-propelled forage harvester. The harvester 10 is built on a frame 12 which has front driven wheels 14 and steerable rear wheels

Wheels 16 is worn. The harvesting machine 10 is operated from a driver's cab 18, from which a header 20 in

Form of a pick-up (so-called pick-up) can be seen. Crops picked up from the ground by means of the header 20, e.g. B. grass or the like is a feed conveyor 22 with

Feed rollers, which are within a feeder housing 24 at the

Front of the forage harvester 10 are arranged, one below the

Driver's cab 18 arranged, provided as a crop processing device chopping drum 26 which chops it into small pieces and gives it up to a conveyor 28 . The crop leaves the harvesting machine 10 to a transport vehicle traveling alongside via an ejection chute 30 which can be rotated about an approximately vertical axis and whose inclination can be adjusted

Directional information, such as sideways, down and up, on the

Forward direction of movement of the harvesting machine 10, which runs to the right in FIG.

The header 20 includes a tine roller 32 to

Picking up the crop lying in a swath on the field, pre-cut and swathed, which is carried out by a

Hydraulic motor 34 can be driven. The hydraulic motor 34 has an adjustable displacement to the rotational speed of the

Zinc roller 32 by a control device 94 to the

To be able to adjust the advance speed of the harvesting machine 10 .

A transverse auger 36 of the header 20 is connected to another hydraulic motor 48 in drive connection whose

Displacement is also changed by the control device 94 to the rotational speed of the transverse auger 36 to the

Conveying speed of the intake conveyor 22 and thus to the

To be able to adapt the cutting length and also to the rotational speed of the tine roller 32, as described in DE 10 2004 029 953 A1 (also with regard to the tine roller 32). 5

An actuator 128 is used to adjust the height of the

Harvesting attachment 20 and to specify the contact pressure on the

Floor. The actuator 128 pivots the intake housing 24 and the removably attached to the intake housing 24 harvesting attachment 20 about the axis of rotation of the chopper drum 26 and also serves to

Raise the harvesting attachment 20 in the headland. One

Operator interface 60, which is attached to a joystick 62 is provided with suitable input means (buttons, etc.), with which a

Operator can specify the contact pressure and / or the height of the header above the ground. The operator interface 60 is in turn connected to a control device 94, which in turn has a

Valve unit 130 (see FIG. 2) controls actuator 128.

The spout 30 is rotatable about a horizontal axis 58 by an actuator 50 to adjust the height of its distal end. It can also be rotated about the vertical axis by an actuator 52 , and an ejection flap 56 arranged at its distal end can be adjusted by an actuator 54 . The operator interface 60 is provided with suitable input means (keys or the like) with which an operator can control the actuators 50, 52, 54. The

Operator interface 60 is connected to the control device 94, which in turn controls the actuators 50, 52, 54 via a valve unit 124 (see FIG. 2).

Figure 2 shows a plan view of the

Drive arrangement of the harvesting machine 10. In the rear area of the harvesting machine 10 there is an internal combustion engine 38, in particular in the form of a diesel engine. The internal combustion engine 38 extends in the forward direction of the harvester 10 and includes a crankshaft 42 which extends forwardly from the housing of the

Internal combustion engine 38 extends out. The internal combustion engine 38

During operation, 6 BE2022/0031 drives a first longitudinal shaft 46 with its crankshaft 42, which is connected to the first bevel gear 66 of an angular gear 64. The first longitudinal shaft 46 also drives a pump unit 74 via gears 70, 72 and a second longitudinal shaft 76, which is a hydraulic pump for driving hydraulic motors for the propulsion of the

Harvester, a steering pump and a hydraulic pump for

Oil supply of the control of the hydrostatic drive for the

propulsion of the harvesting machine 10, and a hydraulic pump 110, which serves to drive a hydraulic motor 112 for driving the rollers of the intake conveyor 22 via a gearbox 114. It would also be conceivable to have further permanently driven gears via one of the gears 70, 72 or a gear arranged in between (not shown).

Elements such as an electric generator and/or a

To drive fan drive for the cooling air supply for the internal combustion engine 38.

A hydraulic pump 126, which is part of the

Pump unit 74 or can be performed separately, is through the shaft 76 or any other, dated

Internal combustion engine 38 driven shaft driven and is the inlet side with a tank 132 and the outlet side with the

Hydraulic motor 34, valve assembly 130 and valve assembly 124, i.e., in response to operator input, drives actuators 50, 52, 54 to move the spout 30, actuator 128 to

Adjustment of the contact pressure and / or the height and for lifting the header 20 and the hydraulic motor 34 for driving the

Tine roller 32 on.

The second bevel gear 68 of the first bevel gear 64 is connected to a transverse shaft 80, which extends through a hollow shaft 106 connected to the pulley 82 to the side of the pulley 82 facing away from the bevel gear 64 and is connected there to a clutch 78. The clutch 78 is connected on the output side to the hollow shaft 106, which also drives a hydraulic pump 102 on the side of the pulley 82 facing the bevel gear 64 via gears 96, 108 and 100

7 BE2022/0031 is used to drive the hydraulic motor 48, the

Cross auger 36 of the header 20 drives. The clutch 78 allows the drive belt 84 and with it the chopping drum 26 and the conveyor 28 on and off. In addition, the open clutch 78 enables reverse operation of the

Chopping drum 26 for grinding the knives of the chopping drum 26 with a grinding device 120 and the closed clutch 78 reversing the intake conveyor 22 and the transverse auger 36, for which reference is made to the disclosure of DE 10 2014 219 205 A1 and the documents cited there.

The controller 94 is connected to an actuator 122 for

Switching the clutch 78 connected. A second

Operator interface 98 allows an operator to instruct the controller 94 to close the clutch 78 to put the cutterhead 26 and the conveyor 28 in motion to the

to start harvesting. The hydraulic pump 110 then supplies the

Hydraulic motor 112 with hydraulic fluid under pressure, which is used to drive the intake conveyor 22, while the

Hydraulic pump 102 the hydraulic motor 48 for driving the

Pressurized hydraulic fluid is applied to the transverse auger 36 and the hydraulic pump 126 supplies the hydraulic motor 34 for driving the tine roller, among other things. The control device 94 is also connected to a foreign body detector 134 , a first pressure sensor 136 , a second pressure sensor 138 and a speed sensor 140 .

The foreign body detector 134 is in one of

Feed rollers of the feed conveyor 22 (in particular the front, upper feed roller or the front, lower feed roller) arranged and detected ferromagnetic foreign bodies using a

Change in a static magnetic field and/or hard foreign bodies due to acoustic or mechanical vibrations (noises) occurring on impact with the feed roller.

8 BE2022/0031

The pressure sensors 136 and 138 detect the

Pressure difference between the inlet and outlet of the hydraulic motor 112 for driving the intake conveyor 22 and the hydraulic motor 48 of the

Cross auger 36. Another pressure sensor (not shown) could also be associated with the hydraulic motor 34 of the tine roller 32.

The speed sensor 140 is coupled to the transverse auger 36 or the hydraulic motor 48 and detects their speed.

Another speed sensor (not shown) could also do that

Hydraulic motor 34 or the tine roller 32 may be assigned.

The control device 94 is configured, if necessary, to automatically reverse the intake conveyor 22 and the

Carry out harvesting attachment 20. In this regard, reference is made to FIG.

After starting in step 200, in step 202 the

Harvesting operations started, i.e. the operator performs the above

Steps through to put the driven elements of the harvesting machine 10 in the harvesting operation.

In step 204 it is queried whether the

Foreign body detector 134 has responded. If that's the case, it follows

Step 206, in which the controller 94 - after switching off the

hydraulic motors 112, 48 and 32 and stopping traction drive of

Harvester 10 - the hydraulic motor 48 and possibly with a time delay

Commanded hydraulic motor 34, the transverse auger 36 and the

To reverse tine roller 32. Here, a relatively high, fixed or entered by the operator speed vl is used, which is sufficient to the foreign body forward from the

Eject header 20. In the following step 208 checks the

Control device 94, based on the signals from the speed sensor 140, whether the transverse auger 36 is rotating (and, if necessary, based on the other

speed sensor whether the tine roller is rotating). If this is not the case, step 208 follows again and otherwise step 210, in

9 BE2022/0031 which the control device 94 commands the hydraulic motor 112 to reverse the rollers of the intake conveyor 22, at a suitable speed V2, which is fixed or specified by the

Operator can be entered. Step 212 follows, in which it is queried whether the reversing process has ended. For this purpose, a timing control that is dependent on v1 and v2 can be provided, which terminates the process after a time that should be sufficient to eject a foreign object. In step 212, a

Inquiry to the operator via operator interface 60 or 98 whether to resume harvesting. The

The operator can thus go out of the cab 18 to the header 20 and check whether the foreign object that should be in front of the header 20 was ejected correctly and remove it if necessary. Step 212 is followed again by step 202.

If the foreign body detector 134 has not responded in step 204, a query is made in step 214 as to whether the header 20 or the intake conveyor 22 is blocked. For this purpose, in a manner known per se (see DE 10 2017 214 097 A1) on the

Pressure sensors 136 and 138 and, if necessary, the pressure sensor of the

Hydraulic motor 34 resorted. If that is the case, step 216 follows, in which the control device 94 - after switching off the

hydraulic motors 112, 48 and 32 and stopping traction drive of

Harvester 10 - the hydraulic motor 48 and possibly with a time delay

Commanded hydraulic motor 34, the transverse auger 36 and the

To reverse tine roller 32. Here, a relatively low, fixed or entered by the operator or based on the

Pressure at the pressure sensor 138 fixed speed v3 is used, which is usually less than v1 in step 206. In the following step 218, the controller 94 checks based on the

Signals from the speed sensor 140 as to whether the transverse auger 36 is rotating (and possibly using the additional speed sensor as to whether the tine roller 32 is rotating). If this is not the case, step 218 follows again and otherwise step 220, in which the control device 94 the

Hydraulic motor 112 commanded to reverse the rollers of the intake conveyor 22 at a speed v4, which is fixed or

10 BE2022/0031 can be entered by the operator or can be determined based on the pressure at the pressure sensor 136 and in particular less than or equal to

speed is v2. Step 222 follows, in which it is queried whether the reversing process has ended. To do this, click on the

Signals from the pressure sensors 136 and 138 and possibly the pressure sensor of the

Hydromotors 34 are used to indicate whether the

Feed conveyor 22, the transverse auger 36 and possibly the

Tine roller 32 rotates freely or not. Additionally or alternatively, speed sensor 140 and other speed sensors can be used

Detection of the speed of the rollers of the intake conveyor 22 and / or the tine roller 32 can be used, because after dissolving the

Traffic jams will rotate these faster than otherwise. In step 222, a query to the operator about the

Operator interface 60 or 98 whether to resume harvesting operations. The operator can thus look at the harvesting attachment 20 from the cab 18 and see whether the jam has been cleared. Step 222 is followed again by step 202.

It should also be noted that the hydraulic drives described could be replaced by electric drives. Instead of a pressure measurement, the current consumed would then be measured. The harvest header could also be used as

Maize header be running. In addition, steps 206 and 216 could also be carried out by manual operator input into the

Operator interface 60 or 98 prompted, for example, two different keys can be provided.

After all, it is proposed here that

Speed of the intake conveyor 22 and the header 20 when reversing (i.e. not switching the

Reversing process, but the non-zero value of their speeds during reversing) set automatically based on operating conditions of the harvesting machine.

In the illustrated embodiment, these operating conditions are a variable that is representative of the drive torque when reversing (namely the pressure in steps 216 and 220), which lead to

11 BE2022/0031 larger blockages are cleared faster than smaller blockages. Another operating condition that

The purpose of determining the reversing speed is the type of sensor that responds in each case to cause the reversing, because a distinction is made as to whether there is a blockage - then reversing is carried out at the drive torque-dependent speed - or whether the foreign body detector 134 has responded - then at a relatively high speed reversed.

In addition, the reversing process of the

feed conveyor 22 compared to switching on the

Reversing process of the intake conveyor 20 is not time-controlled, as in

State of the art, but speed-controlled (steps 208 and 218).

This ensures that the header 20 is already moving first when the intake conveyor 22 is reversed, so that the harvested crop ejected from the intake conveyor 22 does not become jammed in the not yet rotating header 20, but without requiring the previous, rigid time control, in which usually

Safety reserves are planned, which unnecessarily prolong the reversing process. This suggestion comes independently more inventive

Rank too, so he is also independent of the variable

Speed when reversing can be applied and claimed independently.

12 BE2022/0031

Steps of figure 3 200 Start 202 Harvesting operation 204 Foreign body detector? 206 Reverse header with vl 208 Header rotates? 210 Are infeed conveyors reversing with V2 212 ready? 214 overload? 216 Reverse header with V3 = f(pressure) 218 Header rotates? 220 reverse feed with v4 = f(print) 222 finished?

Claims (8)

13 BE2022/0031 PATENT CLAIMS 1. Drive system for a harvesting machine (10), comprising a control device (94) which is connected in a signal-transmitting manner to a drive of a feed conveyor (22) and/or to a drive of a header (20) and is configured to reverse the feed conveyor (22) and/or the header (20), characterized in that the control device (94) is configured to determine the speed at which the header (20) and/or the intake conveyor (22) moves when reversing, from operating conditions of the harvesting machine (10) to specify dependent. The drive system of claim 1, wherein the operating condition is indicative of whether a foreign object detector (134) or an occlusion sensor has responded. 3. Drive system according to claim 2, wherein the control device (94) is configured to command the reversing process more slowly when the blockage sensor responds than when the foreign object detector (134) responds. 4. Drive system according to one of claims 1 to 3, wherein the operating condition is a drive torque of the intake conveyor (22) or the header (20). 5. Drive system according to one of claims 1 to 4, wherein the control device (94) is configured to reverse the intake conveyor (22) only when a speed sensor (140) has detected a reversal of the header (20). 6. Harvesting machine (10) with a drive system according to one of the preceding claims, 7. Harvesting machine (10) according to claim 5 in the form of a forage harvester. 14 BE2022/0031 8. Harvesting machine (10) according to claim 5 or 6, wherein the header (20) is a pickup with a transverse auger (36) and a tine roller (32).