JP2000333526A - Yield detector for combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yield detector for a combine harvester capable of detecting the yield as accurately as possible without causing disadvantages, etc. such as the complication of a structure causing a high cost. SOLUTION: This yield detector is composed so as to subject grain culms reaped with a reaping part 3 and conveyed to threshing treatment with a threshing part 5, recover grains, further convey the recovered grains with a vertical conveying screw 25 and store the grains in a grain tank 6. The yield detector is capable of detecting a driving load caused by grain conveyance in the vertical conveying screw 25 and determining the yield of the grains based on the detected information about the load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain conveying device in which a culm cut and conveyed in a cutting section is threshed in a threshing section to collect grains, and the collected grains are collected in a grain conveying apparatus. The present invention relates to a combine harvest amount detection device configured to be conveyed by a storage tank and stored in a storage tank.

[0002]

2. Description of the Related Art In a combine harvest amount detecting apparatus having the above-described structure, conventionally, as an apparatus for detecting the amount of grain harvested by a mowing operation, for example, the weight of the storage tank is measured by a measuring means such as a load cell. By measuring, the weight of the kernel harvested and stored during the harvesting operation is obtained from the difference between the weight before the harvesting operation and the weight after the harvesting operation is performed (first configuration). Or a distance measuring means such as an ultrasonic sensor is provided at an upper part in the storage tank, and the distance to the upper surface of the grain deposited in the tank as the mowing operation is performed is determined. As the distance is measured by the distance measuring means, as the storage amount increases, the distance decreases according to the amount,
There has been a configuration in which the yield is calculated based on the measured distance (second conventional technology).

[0003]

The measurement information obtained by such a harvest amount detecting apparatus is obtained by detecting what harvest amount has been obtained in a field to be harvested, for example. For the management of farming, such as calculating the amount of harvest in each field and comparing it with the amount of past harvest to adjust the amount of fertilizer, or summing up such amount of harvest information by district This can be used as an index for the information (farming information).

However, the above-described conventional configuration has a disadvantage that the yield cannot be detected with high accuracy, and there is room for improvement. More specifically, the first conventional technique measures the weight of the storage tank,
The storage tank as described above is generally set so that the amount that can be stored in consideration of the work efficiency of the mowing operation is as large as possible. The total weight can be quite large (e.g., several hundred Kg to several tons). As a result, the maximum weight that can be measured by the weighing means must be increased.
In this case, for example, there is a disadvantage that the resolution when detecting a small (about several kg) change in the storage amount is low, and the measurement accuracy is low. In addition, since the weight of the entire storage tank is applied to the weighing means, the detection value changes irregularly during harvesting work due to the vibration of the aircraft during traveling in the field, and the storage amount is accurately detected. It may not be possible.

[0005] In the second prior art, as the harvesting operation is performed, the grain deposited in the storage tank is transported and supplied at the highest portion. Since the circumference gradually decreases, the upper surface becomes a mountain shape instead of a horizontal flat surface. Therefore, in a configuration in which the distance to the upper surface is measured by the distance measuring means, it may not be possible to accurately measure the distance corresponding to the amount of stored grains. Moreover, when the distance is measured using an ultrasonic sensor as the distance measuring means, there is a disadvantage that the accuracy of the distance measurement is reduced. Therefore, in order to avoid such disadvantages, a plurality of devices having high measurement accuracy such as a laser-type distance measuring device are used as the distance measuring means, and the distance to the upper surface of the grain is measured at a plurality of locations. Then, although the detection accuracy can be improved, there is a disadvantage that the structure becomes complicated and the cost increases.

The present invention has been made in view of such a point, and an object of the present invention is to detect a yield as accurately as possible without causing a disadvantage such as incurring a cost increase due to a complicated structure. An object of the present invention is to provide a combine harvest amount detection device that can be used.

[0007]

According to the first aspect of the present invention, there is provided a load detecting means for detecting a driving load associated with grain transport in the grain transport device, and a load detecting means for detecting the drive load. Calculating means for calculating the grain yield based on the calculated value.

[0008] In the combine harvester, the culm that is cut and conveyed in the reaping section is threshed in the threshing section and the cereal grains are collected in association with the reaping operation. Then, the collected grains are transported and stored in the storage tank by the grain transport device, and the load detecting means detects a driving load accompanying the transport of the grains in the grain transport device. The drive load changes in accordance with the amount of grain so that the greater the amount of grain being conveyed at that time, the greater the amount. Therefore, the detected drive load has a value corresponding to the amount of grain conveyed at that time, so that the drive load is integrated according to the work continuation time, or by an arithmetic processing such as an integral calculation. Thus, the yield of grain stored in the storage tank can be determined. In other words, unlike the conventional method, the total amount of the harvested kernel is not measured all at once, but is calculated by a value corresponding to the amount of the kernel transported at that time. It is possible to perform the detection with high accuracy without any problem.

As a result, a relatively simple structure for detecting the driving load in the grain conveying device without complicating the structure of, for example, providing a plurality of expensive distance measuring devices, and detecting the harvest amount with as high accuracy as possible. It has been possible to provide a combine harvest amount detection device capable of performing the above-mentioned operations.

According to a second aspect of the present invention, in the first aspect, the load detecting means transmits the rotational driving force transmitted from the driving unit to the grain conveying device via an elastic body. The driving load is configured to detect a rotational phase difference between a rotary drive portion on the upper transmission side of the elastic body and a rotary drive portion on the lower transmission side of the elastic body.

[0011] Since the rotational driving force transmitted from the driving unit is transmitted to the grain transfer device via the elastic body, if the driving load of the grain transfer device is large, the rotation transmitted from the driving unit is large. When the driving force is transmitted to the lower transmission side via the elastic body, the elastic body is largely elastically deformed by the driving load (driving reaction force). Conversely, if the driving load is small, the amount of elastic deformation is small. . As described above, since the amount of elastic deformation of the elastic body changes in accordance with the magnitude of the driving load, the amount of elastic deformation between the rotary drive part on the upper transmission side of the elastic body and the lower rotation drive part on the transmission side of the elastic body is different. Similarly, the rotational phase difference changes according to the magnitude of the driving load, and this rotational phase difference corresponds to the driving load.

[0012] Since the rotation phase difference is detected in this manner, for example, as compared with a configuration in which the amount of torsional deformation of the drive shaft itself corresponding to the drive load of the grain conveying device is directly detected, the load on the drive load is reduced. The rotational phase difference can be increased, and the driving load can be detected with high accuracy.

According to a third aspect of the present invention, in the second aspect, the calculating means stores the rotational phase difference when the grain conveying device is in a no-load state as a reference phase difference in a storage means. Is configured to be updated and stored, and in a state in which the grain transport device is executing grain transport, based on a deviation between the rotational phase difference and the reference phase difference detected by the load detection unit, It is configured to determine the grain yield.

The rotation phase difference when the grain transport device is in a no-load state is updated and stored in the storage means as a reference phase difference at an appropriate timing, for example, at set time intervals or each time a harvesting operation is started. Then, in a state where the grain transfer device is executing the grain transfer, the grain yield is obtained based on the deviation between the reference phase difference stored in this way and the detected rotational phase difference.

That is, even when the rotational phase difference in the no-load state changes due to aging or the like due to long-term use, an appropriate reference phase difference corresponding to the no-load state is always stored. As a result, the grain yield can be obtained with high accuracy.

According to a fourth aspect of the present invention, in any one of the first to third aspects, an alarm means for executing an alarm operation when the driving load exceeds a set value is provided.

If the driving load is equal to or higher than the set value, for example, there is a possibility that a transport jam may occur in the grain transport device due to foreign matter such as straw chips being mixed therein. By executing the alarm operation, post-processing such as clogging clearing operation can be promptly dealt with.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a combine harvest amount detecting apparatus according to the present invention will be described with reference to the drawings. FIG.
As shown in the figure, the combine is provided with a reaping unit 3 at the front side of a traveling body 2 having a pair of right and left crawler traveling devices 1R and 1L so as to be capable of ascending and descending operation, and operating on a lateral side of the reaping unit 3 on the body. A threshing unit 5 is provided at the rear side of the traveling machine body 2 as a threshing unit for threshing the harvested stalks harvested by the mowing unit 3, and the grains collected by the threshing process. A Glen tank 6 is provided as a storage tank for storing. The cutting unit 3 includes an elevating device 7 that causes the lying planted grain culm to be in an upright position, a cutting device 8 that cuts the root side of the raised planted grain culm, and a harvested grain in a cut upright position. It is provided with a transport device 9 and the like for transporting the grains toward the rear threshing device 5 while nipping and transporting the grains so that the grains gradually fall down. A stock sensor S0 that is turned on when there is a harvested grain culm conveyed in accordance with the harvesting operation and is turned off when there is no grain culm to be conveyed is provided at the conveyance start end of the conveyance device 9.

As shown in FIG. 2, the threshing device 5 is transported by a feed cylinder 12 which is rotated and driven in a handling chamber 11 while nipping and transporting the root side of the cut culm by a feed chain 10. The spike side of the cereal stem to be processed is processed, and the processed material that has been processed is leaked from the receiving net 13 to the lower sorting device 14 and is sorted. The sorting device 14 transfers the leaked processed material toward the lower side in the transport direction (rightward in the drawing) by a swinging motion,
Oscillating sorting plate 1 that sorts and sorts secondary items such as grains and rice with branches
5. Karino 16 which supplies the sorting wind, the first thing collecting screw 17 which collects the grain leaked from the swing sorting plate 15 and conveys it to one side of the machine body, and 2 which leaks from the swing sorting plate 15. It is provided with a second item recovery screw 18 for collecting and transporting the items to one lateral side of the machine body, and a dust exhaust fan 19 for discharging dust such as fine straw chips outside the machine. The swing sorting plate 1
5 is a Glen pan 20 that receives the processed material leaking from the transport start end side of the handling chamber 11 and transfers the processed material to the rear side; a rough sorting chaff sheave 21 that sorts and leaks grains and second articles while swinging and transferring; A straw rack 22 for sending straw chips backward is provided in the order in which they are described along the processed material transfer direction, and below the chaff sieve 21, a grain sieve 23 for fine sorting for sorting and leaking grains is provided. Material recovery screw 1
7 is configured to collect grains. A sheave sensor S1 for detecting the layer thickness of the amount of the workpiece to be oscillated is provided above the oscillating selection plate 15. still,
Although not described in detail, the chief sheave 21 has a configuration in which the leak opening thereof is automatically adjusted based on the detection information of the sheave sensor S1. For example, sheave sensor S
Detected value of 1 (the actual thickness of the processed material on the swinging sorting plate 15)
Is controlled to be the set target layer thickness.

The grains collected by the first thing collecting screw 17 and conveyed to one side of the threshing device 5 are vertically linked to the first thing collecting screw 17 via a bevel gear mechanism 24. The conveying screw 25 lifts and conveys, and supplies and stores it inside the Glen tank 6 in a state of being scattered from a supply port 26 at the upper end thereof by a blade 27 provided in the vertical conveying screw 25.
Reference numeral 28 in the drawing denotes an unloader device for discharging the grains stored in the Glen tank 6 to a truck or the like outside the machine body after the cutting operation is completed. A moisture meter S2 for measuring the moisture content of the grain is provided in the middle of the transport of the first object recovery screw 17, and measures the moisture content of the grain being transported. For example, when the planted cereal stalk is wet with rain or morning dew and has a large amount of water, the driving load during transport is greater than when the amount is small, so the moisture is measured,
It is used in a harvest amount calculation process as described later.

FIG. 3 shows the transmission structure of the combine. The power of the engine E as a prime mover is transmitted to the left and right crawler traveling devices 1 via a belt tension type main clutch 29, a hydraulic type continuously variable transmission 30 and a transmission case 31.
R and 1L, and the output after the speed change by the continuously variable transmission 30 is intermittently transmitted to the reaper 3 via the reaping clutch 33. On the other hand, the power of the engine E is configured to be intermittently transmitted to the threshing apparatus 5 via a threshing clutch 35 which is turned on and off by a threshing clutch lever 34. A threshing switch SW1 that is turned on when the threshing clutch lever 34 is turned on and turned off when the threshing clutch lever 34 is turned off is provided.

The combine includes a load detecting means for detecting a driving load accompanying the grain transport in the vertical transport screw 25 as an example of a grain transport apparatus, and a grain based on the detection information of the load detecting means. There is provided arithmetic means for calculating the yield. The load detecting means detects that the rotational driving force transmitted from the engine E via the first object recovery screw 17 is transmitted to the vertical transport screw 25 via an elastic body.
The rotational phase difference between the rotational drive part on the upper transmission side of the elastic body and the rotational drive part on the lower transmission side of the elastic body is detected, and the rotational phase difference of the rotational phase difference is detected. It is configured to detect the driving load based on the information.

That is, as shown in FIG. 3 and FIG. 4, the rotational power from the engine E transmitted through the first object recovery screw 17 having the horizontal rotation axis is transmitted to the vertical transport screw 25 having the vertical axis. A transmission system is formed by being interlocked and connected via a bevel gear mechanism 24 so as to be transmitted, and an elastic body transmission mechanism D is provided between the vertical output shaft 36 of the bevel gear mechanism 24 and the drive shaft 25a of the vertical conveyance screw 25. It is interposed. The elastic body transmission mechanism D is configured as follows. That is, as shown in FIGS. 5 and 6, the vertical output shaft 36 of the bevel gear mechanism 24 and the drive shaft 25 a of the vertical transport screw 25 are located on the same axis, and the upper side small diameter of the vertical output shaft 36. The shaft portion 36a is fitted inside the drive shaft 25a of the vertical conveying screw 25 formed in a cylindrical shape so as to be relatively rotatable. And the vertical output shaft 36
And a driven-side rotating plate 38 (corresponding to a rotationally driven portion on the upper side of the transmission) that is integrally provided on the drive shaft 25a of the vertical conveying screw 25. And a pair of protrusions 39 fixed to the driving-side rotating plate 37 at intervals of about 180 degrees in the circumferential direction, and a pair of protrusions 39 fixed to the driven-side rotating plate 37 at a predetermined interval. Coil springs 4 are provided between a pair of projections 40 fixed at intervals of about 180 degrees in the circumferential direction.
1 is installed. Therefore, when the driving-side rotating plate 37 is rotationally driven, the driven-side rotating plate 38 is rotationally driven via the tension of the coil springs 41. A pair of projections 40 fixedly mounted on the driven-side rotating plate 38;
Are provided so as to penetrate the drive-side rotating plate 37 with a long hole 42 having a predetermined length in the circumferential direction.
Reference numeral 38 is configured to be capable of relative rotation by an amount corresponding to the slot 42. In this manner, the rotary driving force from the engine E is transmitted to the vertical transport screw 25 via each coil spring 41 as an elastic body.

A concave groove 43 is formed in a part of the outer circumference of each of the rotating bodies 37 and 38 in the circumferential direction, and a rotation sensor is provided at a predetermined position radially outward of each of the rotating bodies 37 and 38. S3 and S4 are provided in a fixed position. Each of the rotation sensors S3 and S4 is, for example, a Hall element or the like, using a change in magnetism due to a change in a separation distance from the outer periphery of each of the rotating bodies 37 and 38 or the like. 7 is configured to output a detection signal as shown in FIG. The outputs of the rotation sensors S3 and S4 are input to a control device H including a microcomputer.

As shown in FIG. 8, the control device H
In addition to the rotation sensors S3 and S4, the threshing switch SW1, the stock switch S0, the sheave sensor S1,
A moisture meter S2, a non-volatile memory M as a storage means are connected, a start command switch SW2 for instructing the start of the harvest amount calculation process, a stop command switch SW3 for instructing a stop of the harvest amount calculation process, a calculation result. An output command switch SW4 for instructing an output process, a display unit 44 for displaying a calculation result such as a liquid crystal display device, and information for writing information to a magnetic storage medium such as a floppy disk capable of outputting the calculation result to the outside. An external output device 45 such as a recording device or a printer, and an alarm lamp 46 as an example of alarm means for alarming an abnormal state as described later are connected to each other.

When a start command is given by the start command switch SW2, the control device stops the stop command switch S.
Each rotation sensor S3, S
4 and the driven side rotating plate 38 at the output of FIG.
Based on the rotational phase difference (corresponding to the driving load on the vertical transport screw 25), the arithmetic processing for obtaining the grain harvest amount is executed, and the arithmetic result is sequentially written and stored in the memory M. When an output command is issued by the output command switch SW4 after the operation is completed, the display unit 44 displays the output command and the external output device 45 outputs the command. Also, this control device H
Is configured so that each time a mowing operation is newly started, the rotational phase difference when the vertical transport screw 25 is in a no-load state is updated and stored in the memory M as a reference phase difference. Is configured to calculate the kernel yield based on the deviation between the detected rotational phase difference and the reference phase difference in a state where the kernel transport is being performed.

Hereinafter, the processing for detecting the amount of harvest by the control device H will be described with reference to the flowchart of FIG. The state in which the vertical transport screw 25 is unloaded until the harvesting operation is started, specifically, the threshing clutch 35 is turned on and the threshing switch SW1 is turned on, the stock switch S0 is off, and the sheave sensor S1 is turned off. If the set time (several seconds) continues while the detection value (layer thickness) is at the minimum level, the information of the rotation phase difference based on the outputs of the rotation sensors S3 and S4 at that time is stored in the memory M as a reference value. It is written and stored (steps 1 to 5). The information on the rotational phase difference will be described in detail. As shown in FIG. 7, the repetition period T of the detection signal (b) of the rotation sensor S3 corresponding to the driving-side rotation plate 37 and the rotation sensor S3, S4 Ratio of detection signal (a), (b) to phase difference t (t / T)
Is the information of the rotational phase difference.

Next, the harvesting operation is started, and the stock switch S is started.
0 turns on and when there is a start command by the start command switch SW2, a rotation phase difference based on the output of each of the rotation sensors S3 and S4 is detected, and the difference between the rotation phase difference and the reference value stored in the memory M is detected. Based on the deviation, the amount of transported grains is obtained by calculation (steps 6, 7, 8). The rotational phase difference is
It changes according to the driving load of the vertical transport screw 25. That is, when the driving load is small, the coil spring 41 does not expand significantly, and the rotation phase difference between the driving side rotating plate 37 and the driven side rotating plate 38 is small. As a result, the amount of extension of the coil spring 41 increases, and the rotational phase difference between the driving-side rotary plate 37 and the driven-side rotary plate 38 increases. Incidentally, the actual correspondence between the magnitude of the driving load of the vertical transport screw 25 and the rotational phase difference is obtained in advance by an experiment and stored in the memory M. Therefore, the rotational phase difference corresponds to the driving load of the vertical transport screw 25, that is, the amount of the kernel transported at that time. Therefore, it is necessary to determine the transport kernel amount based on the information of the rotational phase difference. You can.

At this time, according to the moisture content of the grains measured by the moisture meter S2, the amount of the transported grains obtained as described above is appropriately corrected (step 9). When the moisture is small and dry, it is easy to transport and the transport load is small, but when the amount of moisture is large, the grains are easily attached to the transporting surface and between the grains, and when transported Transport load becomes large. Therefore, even if the transport kernel amount is the same, the transport load increases as the amount of moisture increases, so that the transport kernel amount obtained based on the rotational phase difference as described above is corrected to a smaller side as the moisture increases. Will do.

Next, the amount of the transported kernel obtained as described above is integrated, for example, for each set unit time, thereby obtaining the amount of the unit kernel harvested during that time. The amount is sequentially written and stored in the memory M, and the total harvest amount obtained by summing them is also stored in the memory M.
(Step 1)
0). Such a process of measuring the amount of grain harvest is repeatedly executed until a stop command is issued by the stop command switch SW3 (step 11).

During the process of measuring the amount of grain harvest, the rotational phase difference is determined, for example, by the fact that the projection 40 fixed to the driven-side rotating plate 38 is at the opposite end of the elongated hole 42. If it is detected that the value is larger than the set allowable value so that the coil spring 41 expands until it reaches a nearby position, it can be determined that an abnormal state such as the vertical conveyance screw 25 is jammed in the conveyance. The processing described above is stopped to execute the alarm operation (steps 12 and 13). The warning lamp 46 is turned on to notify the operator of an abnormal state due to clogging.

For example, after the harvesting operation in a certain field is completed and the above-described processing for measuring the amount of grain harvest is stopped by the stop command by the stop command switch SW3, the output process is commanded by the output command switch SW4. Then, an output process is executed (steps 14 and 15). That is, the measurement result, that is, the harvest amount per unit time,
In addition to displaying the integrated harvest amount and the like during the period from when the start command is issued to when the stop command is issued, an external output process such as a writing process on a magnetic storage medium or a printing process on paper is executed. .

Therefore, load detecting means is constituted by the elastic body transmission mechanism D and the rotation sensors S3 and S4.
Using the control device H, a calculation means for calculating the grain harvest based on the load detection information is configured.

Alternative Embodiment (1) In the above embodiment, two coil springs were used as the elastic body. However, three or more coil springs may be used, or rubber or rubber may be used instead of the coil spring. An elastic body such as a leaf spring may be used.

(2) In the above embodiment, the elastic transmission mechanism D and each of the rotation sensors S3 serve as load detecting means for detecting a driving load accompanying the grain transport in the vertical transport screw 25 (grain transport device). , S4, the load detecting means is not limited to such a configuration. For example, the drive shaft 2 of the vertical transport screw 25 may be used.
5a is connected to the output shaft 36 of the bevel gear mechanism 24 so as to rotate integrally with the output shaft 36, and the amount of twist of the drive shaft 25a accompanying grain transport is directly detected by a strain gauge. The driving load may be detected in a form.

(3) In the above embodiment, when the rotation phase difference when the grain conveying device is in the no-load state is updated and stored in the storage means (memory M) as the reference phase difference, the harvesting operation is newly performed. Each time the operation is started, such an update storage process is performed. Instead of such a configuration, for example, an operation switch for instructing update storage is provided, and when the operation switch is operated, the update storage process is performed. And the like can be implemented in various forms. Further, a configuration in which such an update storage process is not performed may be adopted.

(4) In the above embodiment, the transported grain amount is
The unit grain harvest amount to be integrated for each set unit time is sequentially written and stored in the memory M, and the integrated harvest amount obtained by summing them is also written and stored. However, the present invention is not limited to such a configuration. Only the integrated harvested amount from when the start command is issued to when the stop command is issued may be stored and output.

(5) In the above embodiment, the measurement result of the obtained harvest amount is displayed on the display unit 44 or output to the external output device 45. However, instead of such a configuration, In addition to such a configuration, a configuration may be adopted in which communication with an external management device is performed by wireless communication.

(6) In the above embodiment, the drive load of the vertical transport screw is detected. However, the grain transport device is not limited to the vertical transport screw, but detects the drive load of the first material recovery screw. It is good also as composition which performs.

(7) In the above embodiment, the alarm lamp is turned on as the alarm operation. However, instead of such a configuration, or in addition to such a configuration, a buzzer may be activated. Alternatively, an operation such as an emergency stop of the engine may be executed, or such an alarm operation may not be executed.

(8) In the above embodiment, the moisture content is provided and the transported grain amount is corrected based on the measurement result. However, instead of such a configuration, for example, the grain is wet. In such a case, the drying apparatus is provided with a drying device for drying the grains conveyed by the first object recovery screw, and as much as possible, the grains are conveyed in a low moisture state. You may.

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is a side view showing a schematic configuration of a threshing apparatus.

FIG. 3 Transmission system diagram

FIG. 4 is a diagram showing a grain collection and transport configuration;

FIG. 5 is a side view of the elastic transmission mechanism.

FIG. 6 is a plan view of each rotating plate.

FIG. 7 shows a detection signal.

FIG. 8 is a control block diagram.

FIG. 9 is a flowchart of a control operation.

[Explanation of symbols]

 Reference Signs List 3 Cutting unit 5 Threshing unit 6 Storage tank 25 Kernel transport device 37 Transmission upper-side rotation drive unit 38 Transmission lower-side rotation drive unit 41 Elastic body 46 Alarm unit D, S3, S4 Load detection unit E Drive unit H calculation unit M storage means

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Sora Aida 64 Ishizukitamachi, Sakai City, Osaka Prefecture Inside the Kubota Sakai Works, Ltd. (72) Inventor Hiroshi Ikeda 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house F-term (reference) 2B396 JA04 JC07 KA02 KA04 KA07 KC05 KE03 LE02 LE03 LE18 LL13 LL17 LN02 LN07 LN12 LP03 LP08 LP12 LP17 LR02 LR08 LR13 LR19 MA05 MC02 MC07 MC13 PC05 PC06 QA03 QA14 QA01 Q24 QA21 QA20 QAQ2 CE25 CE32 CF11 CF20 CG09

Claims (4)

[Claims] A culm harvested and transported by a reaping unit is subjected to threshing processing in a threshing unit to collect kernels, and the collected kernels are transported by a kernel transport device and stored in a storage tank. A harvest amount detection device for combine harvesters configured to be stored in the grain transfer device, wherein the load detection device detects a driving load associated with grain transport in the grain transport device, based on detection information of the load detection device. And a calculating means for calculating a grain yield. 2. The load detecting means transmits, via an elastic body, a rotational driving force transmitted from a prime mover to the grain conveying device, and as the driving load, a rotation on a more transmission side than the elastic body. 2. The combine harvest amount detecting device according to claim 1, wherein a rotation phase difference between the driving portion and a rotation driving portion on the lower side of the transmission with respect to the elastic body is detected. 3. The arithmetic unit is configured to update and store, in a storage unit, the rotational phase difference when the grain transport device is in a no-load state as a reference phase difference. 3. The apparatus according to claim 2, wherein in a state in which the grain transport is being performed, a kernel harvest amount is obtained based on a deviation between the rotation phase difference detected by the load detection unit and the reference phase difference. An apparatus for detecting a harvest amount of a combine as described above. 4. An alarming means for executing an alarming operation when said driving load exceeds a set value.
The harvest amount detection device for a combine according to any one of items 3 to 3.