JPH09187148A - Feed chain action controller in combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feed chain action controller in a combine harvester capable of preventing stem dropping. SOLUTION: This feed chain action controller has an action commanding means commanding that, when a reaping clutch CL2 is operated to 'off' at a car speed of the combine harvester lower than a prescribed value, an 'off' signal operating a feed clutch CL4 to 'off' is outputted and an 'off' signal operating the reaping clutch CL2 is outputted after passing a prescribed delaying time and when the reaping clutch CL2 is operated to 'on', an 'on' signal operating the reaping clutch CL2 to 'on' is outputted and the feed clutch CL4 is operated to 'on' after passing a prescribed delay time. When a car speed is quick, the delay time is set to be shorter and when the car speed is slow, the delay time is set to be longer. Then, a layer of grain stem in a relaying part of a longitudinal carrying chain 43 and a feed chain 52 by providing a time lag between the feed chain 52 and an action timing of a reaping part 3, thus the stem dropping is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine feed chain operation control device.

[0002]

2. Description of the Related Art A combine harvester is constructed such that a traveling unit advances a harvesting unit to mow grain culms one after another, and a conveyor unit feeds grain culms to a threshing unit and threshes at the threshing unit. That is, the forward movement of the traveling device and the drive of the mowing section and the threshing section are basically linked. For this reason, the start and stop of the mowing section including the conveying device and the start and stop of the processing cylinder and the feed chain that form the threshing section are also synchronized.

[0003]

However, the working speed of the mowing part including the carrying device increases or decreases according to the forward speed of the combine, but the threshing part operates at a constant speed, so that the mowing work speed is high during carrying. The grain layer is thick and can be reliably delivered between the end of the carrier and the feed chain, but when the mowing speed is slow, the grain layer is thin, so
There was a problem that the culm spilled when it was transferred from the end of the carrier to the feed chain.

In view of such circumstances, it is an object of the present invention to provide a combine feed chain operation control device which prevents spillage.

[0005]

According to another aspect of the present invention, there is provided a feed chain operation control device comprising a mowing section including a conveying device, a threshing section including a feed chain, and a traveling device, and a mowing clutch for turning on and off the drive of the mowing section. In a combine having a feed clutch that turns the drive of the feed chain on and off, a vehicle speed sensor that detects the forward speed of the combine, a harvesting clutch sensor that detects the on / off operation of the harvesting clutch, and when the combine vehicle speed is below a predetermined value. When the cutting clutch is disengaged, a "disconnect" signal for disengaging the feed clutch is output, and then a "disconnect" signal disengaging the discontinuing clutch is output after a predetermined delay time, and the disengaging clutch is operated. Then, after outputting the "ON" signal to operate the harvesting clutch, the feed clutch is engaged after a predetermined delay time has elapsed. Characterized by providing the operation command means for outputting a "ON" signal to create. 3. The feed chain operation control device according to claim 2, wherein the operation command means takes in a vehicle speed for a fixed time when the traveling of the combine is stopped, the delay time is short when the vehicle speed is fast, and the delay time is long when the vehicle speed is slow. It is characterized by doing. In the feed chain operation control device according to a third aspect of the present invention, the operation instructing means outputs a "disconnection" signal of the mowing clutch or a "on" signal of the feed clutch after a lapse of a certain delay time.

According to the first aspect of the present invention, when the combine vehicle speed is lower than a predetermined value, when the cutting clutch is disengaged, the cutting unit operates for a while even if the feed chain is immediately stopped. The culm spills do not occur because the grain culm layer is stored thickly at the end and the inherited part of the feed chain. Also, when the cutting clutch is turned on, the cutting chain is operated for a while and then the feed chain is started.Thus, since the grain stalks are accumulated at the end of the conveyor and the inheritance section of the feed chain to thicken the culm, spillage occurs. do not do. In the invention of claim 1, the above-mentioned on / off operation of the reaping clutch is not only a manual operation, but also an automatic on / off operation and a reaper section interlocking with switching between forward and neutral (including backward) movement of the main transmission. It also includes an on / off operation linked to lifting and lowering, and spillage can be prevented by either manual control or automatic control. According to the invention of claim 2, the delay time is changed to shorten the delay time when the vehicle speed is high, and the reaping work is quickly ended or started while the culm is sufficiently scratched, and the vehicle speed is slow. At this time, it is possible to lengthen the delay time and sufficiently scratch the culm. According to the third aspect of the invention, since the delay time is constant, the control software can be simplified and can be configured by incorporating a known off-delay circuit or the like, so that the control device becomes inexpensive.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 4 is a schematic side view of the combine to which the present invention is applied, FIG. 5 is an explanatory view of the reaping unit 3, and FIG. 6 is a perspective view near the end of the conveying device 4 and the start end of the feed chain 52.
FIG. 7 is a block diagram showing the drive system of the combine. In FIG. 4, reference numeral 1 denotes a traveling device such as a crawler, and a machine base 2 is attached to the upper surface of the traveling device 1. A reaping unit 3 is attached to the front of the machine base 2, and a threshing unit 5 is provided on the upper surface of the machine base 2.
A sorting unit 6, a straw processing unit 7, a grain tank 8, a driver's seat 9 and the like are mounted. The threshing unit 5 has a processing cylinder 51 and a feed chain 52.

Explaining the mowing section 3 with reference to FIG. 5, the mowing section 3 is composed of a raising device 3a, a mowing device 3b, a scraping device 3c and a carrying device 4. The vertical output case 11 for supporting the above-mentioned respective parts of the reaping unit 3 and transmitting the driving force, the horizontal output case 12 horizontally connected to the lower end of the vertical output case 11, and the horizontal output case 12 are provided. Consists of a raising drive case 13 that is connected upward from both left and right sides.
A drive shaft for transmitting power to each part is incorporated in 11, 12, and 13 by being connected with a gear or the like. The vertical output case
An elevating cylinder 3d is connected to the machine base 2 at 11, and by extending and contracting the elevating cylinder 11, the vertical height of the mowing section 3, that is, the cutting height can be freely changed. There is.

The raising device 3a includes a raising drive case 21 that is swingably attached to the upper end of the raising drive case 13, and a weeding frame 23 that can be raised and lowered by an elevation cylinder 22 attached to the raising drive case 21. A grass cylinder 24 attached to the lower end of the grass frame 23 and a gas cylinder 25 that causes the case 21 to rock by raising it.
It is composed of The harvesting device 3b has a horizontal output case 12
It is composed of a mowing frame 26 projecting obliquely forward and downward from and a mowing blade 27 attached to the lower surface of the mowing frame 26, and the mowing blade 27 mows the root side of the raised culm. The scraping device 3c is provided above the mowing device 3b, and the pair of left and right scraping belts 31 and the pair of left and right star-shaped foils 32 provided below the scraping belt 31 are used to cut the grain. The culm is scraped and sent to the rear.

The carrier device 4 comprises a stock carrier chain 41, a vertical carrier chain 42, and a tip-system feed tine 43. The stock conveyor chain 41 extends obliquely rearward from between the scraping belt 31 and the star-shaped wheel 32, and the vertical conveyor chain 42 is arranged from near the end of the stock conveyor chain 41 to near the start end of the feed chain 52. ing.

As shown in FIG. 6, the end of the vertical conveying chain 42 and the starting end of the feed chain 52 are close to each other,
The grain culm sent to the end of the vertical transport chain 42 is a guide rod 53.
Guided by, it is caught between the feed chain 52 and its holding rod 54, and is inherited by the feed chain 52. At this time, when the amount of grain culm caught between the vertical transport chain 42 and the presser bar 44 is small, spillage is likely to occur, and when the amount of grain culm is large, the culm will be firmly caught and the spillage will occur. It has already been described that the above does not occur.

FIG. 7 is a block diagram of the power system of the combine. The output of the engine E is transmitted to the main transmission TM via the traveling clutch CL1 and one of the two main shafts of the main transmission TM is transmitted. Through the reaping clutch CL2 and the reaper 3 (raising device
3a, the mowing device 3b, the scraping device 3C, and the transfer device 4), and another output shaft of the main transmission TM is the traveling device 1
Is transmitting power to. The output of the engine E is transmitted to the processing cylinder 51 of the threshing section 5, the feed chain 52, the sorting section 6, the straw processing section 7 and the like via the threshing clutch CL3. A hydrostatic transmission is used as the main transmission TM, and the traveling clutch CL1 and the threshing clutch CL3 are manually operated by levers. The reaping clutch CL2 has a tension pulley pressed against a power transmission belt wound between a pulley on the main transmission TM side and a pulley on the input end of the vertical output case 11, and this tension pulley is connected by a motor drive link. Rock,
The power transmission is switched between on and off by tensioning or loosening the power transmission pulley. The feed chain 52 is connected to the power system of the threshing unit 5 via the feed clutch CL4.
Is an electromagnetic clutch.

Next, a combine controller having the above-mentioned mechanical structure will be described. FIG. 1 is a block diagram of a feed chain operation control device of the present invention. In the figure, 10 is a controller using a microcomputer or the like, which is a function realizing means for executing the operation commanding means described in the claims. R of this controller 10
OM is a memory for storing delay time calculation and control programs for the cutting clutch and feed clutch, RAM is a memory for temporarily storing input information from each sensor, CPU
Is an information processing device for performing calculation using various information temporarily stored in the RAM based on the program in the ROM and outputting control signals for the reaping clutch CL2 and the feed clutch CL4. Then, at the input port of the controller 10, a vehicle speed sensor S1 for detecting the forward speed of the combine, a cutting clutch
Mowing switch SW1 for detecting the on / off state of CL2, main transmission
Main shift sensor S3 that detects switching between TM forward and neutral (including backward), lift switch SW that raises and lowers the reaping unit 3
2, a cutting height sensor S5 for detecting the cutting height of the cutting unit 3, an automatic clutch switch for instructing a synchronous control that basically synchronizes the on / off operation of the cutting clutch CL2 and the start / stop of the threshing unit 5.
The SW3 and the like are connected, and the output port is connected to the drive circuit 45 that drives the motor of the reaping clutch CL2, the drive circuit 55 of the feed clutch CL4, and the like. And the reaping clutch
When CL2 is connected, the vertical transport chain 43 and the like are driven, and when feed clutch CL4 is connected, feed chain 52
Is driven.

A delay time calculation program is stored in the ROM of the controller 10, and the following calculation is performed based on this program. While the combine is traveling, the forward speed from the vehicle speed sensor S1 is constantly taken in and RAM is stored.
When the combine stops traveling, the speed at a fixed time (for example, 7 seconds before) before the combine is read from the RAM. If the speed at that time is fast, shorten the delay time,
If the traveling speed is slow, increase the delay time. The reason is that when the traveling speed of the combine is high, the operation of the mowing unit 3 is also fast, so that even if the operation time is short, the grain stems can be sufficiently stored in the end portion of the vertical transport chain 43, and the traveling of the combine can be performed. This is because when the speed is slow and the operation of the reaper 3 is slow, the grain culms cannot be reliably stored unless the operation time is extended.

Regarding the relationship between the traveling speed and the delay time, a threshold is set for the traveling speed and the delay time is divided into long and short before and after the threshold, or the threshold is set to 2 or more and the delay time is divided into 3 or more stages. Good. Further, the delay time may be continuously and inversely proportional to the traveling speed and may be changed steplessly.

Next, the control operation of the cutting unit 3 will be described with reference to the block diagram of FIG. 1 and the flow charts of FIGS.
In the harvesting work of the combine, the harvesting section 3 is operated while moving the combine forward, so that the traveling clutch CL1 also
The harvesting work is performed with the harvesting clutch CL2 also in the connected state, and during the harvesting operation, the vehicle speed is constantly taken in from the vehicle speed sensor S1 and the control operation of the present invention is executed when the vehicle speed falls below a predetermined speed (for example, 0.2 to 0.3 m / s). Yes (101).

First, the stop operation will be described with reference to FIG. When the cutting clutch CL2 is artificially disengaged during the low speed running (102), it is detected by the slicing switch SW1 and a "disconnect" signal is sent to the drive circuit 55 to immediately disengage the feed clutch CL4 of the feed chain 52. Is output, the delay time calculation program is executed (103), and after the delay time corresponding to the vehicle speed has elapsed, the controller 10 outputs a “OFF” signal to the drive circuit 45 of the cutting clutch CL2, and the cutting clutch CL2 is turned off to perform vertical conveyance. Mowing unit 3 including chain 43
Stops.

When the cutting height is raised and the cutting height sensor S5 detects that the cutting height has reached a predetermined cutting height (for example, 40 cm) (104), the main transmission TM is in the neutral position or the retracted position. When the main shift sensor S5 detects that the transmission has been switched to (105), the delay time is calculated in the same manner (103), and the cutting unit 3 stops operating after a certain time has elapsed after the feed chain 52 stopped. To do.

Next, the starting operation will be described with reference to FIG. When the reaping clutch CL2 is artificially turned on (202) while the vehicle is traveling at a low speed (202), the reaping clutch CL2 that drives the conveyor 4 is detected by the reaping switch SW1.
The signal “ON” is output to the drive circuit 45 to immediately perform the input operation, and the delay time calculation program is executed (203). After the delay time corresponding to the vehicle speed has elapsed, the controller 10 sends the signal to the drive circuit 55 of the feed clutch CL4 “ An "on" signal is output,
The feed clutch CL4 is put in and the feed chain 52 is activated.

When the cutting height sensor S5 detects that the mowing unit 3 has descended and fell below a predetermined mowing height (for example, 40 cm) (204), the main transmission M is moved to the neutral position or the retracted position. When the switch is switched from the forward position to the forward position (205), the delay time is similarly calculated (203), and the feed chain 52 is started after a certain time has elapsed after the cutting unit 3 was started.

As described above, according to the operation control device of the present embodiment, the cutting unit 3 is operated for a while while the feed chain 52 is stopped, so that the cutting grain culm is surely attached to the end of the vertical transport chain 43. Since the spillage is stored, spills will not occur. In cases other than the above (for example, even when the vehicle speed is equal to or higher than a predetermined value), the reaper 3 and the feed chain 52 are synchronously started and stopped by another control program.

Next, another embodiment of the present invention will be described. In the above embodiment, the delay time is variable according to the traveling speed of the combine before stopping, but the delay time may be constant. In this case, since the delay time calculation program is not required, the cost for creating the control software is low, and the control circuit can be easily configured by using a known off-delay circuit.

[0023]

According to the first aspect of the present invention, when the vehicle speed of the combine is low at a predetermined value or less, the mowing section operates for a while even if the feed chain is immediately stopped when the mowing clutch is disengaged. Since the grain culm layer is stored thickly at the end of the carrier and the inheritance part of the feed chain,
There are no spills. Also, when the cutting clutch is turned on, the cutting chain is operated for a while and then the feed chain is started.Thus, since the grain stalks are accumulated at the end of the conveyor and the inheritance section of the feed chain to thicken the culm, spillage occurs. do not do. According to the invention of claim 2, the delay time is changed to shorten the delay time when the vehicle speed is high, and the reaping work is quickly ended or started while the culm is sufficiently scratched, and the vehicle speed is slow. At this time, it is possible to lengthen the delay time and sufficiently scratch the culm. According to the invention of claim 3, since the delay time is constant, the control software can be simplified and the control device can be constructed by incorporating a known off-delay circuit or the like, so that the control device can be inexpensive.

[Brief description of the drawings]

FIG. 1 is a block diagram of a feed chain operation control device of the present invention.

FIG. 2 is a flowchart of a stop operation of the transport device 4 and a feed chain 52.

FIG. 3 is a flowchart of a start-up operation of the transport device 4 and the feed chain 52.

FIG. 4 is a schematic side view of the combine.

FIG. 5 is an explanatory diagram of a configuration of a reaping section 3 and a conveying section 4 thereof.

6 is a perspective view of a vertical transport chain 42 and a feed chain 52. FIG.

FIG. 7 is a block diagram showing a drive system of the combine.

[Explanation of symbols]

1 Traveling device 3 Mowing section 4 Conveying section 42 Vertical conveying chain 5 Threshing section 52 Feed chain 10 Controller CL4 Feed clutch S5 Cutting height sensor CL2 Cutting clutch

Claims (3)

[Claims] 1. A combine having a cutting unit including a conveying device, a threshing unit including a feed chain, and a traveling device, and having a cutting clutch for turning on and off the drive of the cutting unit and a feed clutch for turning on and off the drive of the feed chain. , A vehicle speed sensor that detects the forward speed of the combine,
When the harvest clutch is disengaged when the combine vehicle speed is less than a predetermined value, the harvest clutch sensor that detects the on / off operation of the harvest clutch is output, and then the "disconnect" signal to disengage the feed clutch is output. Outputs a "OFF" signal to operate the mowing clutch after the delay time has elapsed, and when the mowing clutch is turned on, "ON" to turn on the mowing clutch.
A combine feed chain operation control device comprising: an operation command means for outputting an "ON" signal for operating the feed clutch after a predetermined delay time has elapsed after outputting the signal. 2. The operation command means takes in a vehicle speed a predetermined time before the combine travel is stopped, calculates a delay time based on the vehicle speed, and when the vehicle speed is fast, the delay time is short and the vehicle speed is slow. 2. The feed chain operation control device according to claim 1, wherein the delay time is lengthened. 3. The feed chain operation control device according to claim 1, wherein said operation command means outputs a "disconnection" signal of the mowing clutch or an "on" signal of the feed clutch after a lapse of a certain delay time.