JPH033159Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a threshing drive device, such as a swing sorter or a winnow, which is incorporated into a threshing unit. Conventionally, as shown in Japanese Utility Model Application Publication No. 56-90848, there has been a technique in which a speed change mechanism is attached to the input shaft that drives the swing sorting board and winnowing machine of the threshing section.

However, the above-mentioned conventional technology detects the rotation of the handling cylinder and controls the speed change mechanism of the input shaft to increase the speed when the rotation of the handling cylinder decreases. Since the speed of the input shaft is increased to further increase the engine load, there are safety and functional problems such as the engine tends to stop due to this overload and the rotation of the handling cylinder tends to decrease.

In addition, when the reaping operation is stopped, for example when turning around on the headland or when handling by hand, the rotation of the handling drum is maintained above the set value, so the speed of the input shaft is not increased, and therefore the threshing Even if the number of grain culms to be processed decreases and the proportion of culm-cut straw waste included in the threshed grain increases, the sorting conditions are kept approximately constant, and the amount of straw waste mixed into the grain taken out from the threshing section is likely to increase. There was a problem.

However, the present invention provides a threshing drive device for a combine harvester in which a speed change mechanism is provided on the input shaft that drives the threshing section, and a sensor is provided to detect the discontinuation of the reaping operation.
The present invention is characterized in that the speed change mechanism is automatically controlled to increase the speed by the sensor when the reaping operation is stopped.

Therefore, since the speed of the input shaft is increased by stopping the reaping operation, problems such as the engine becoming overloaded and stopping, as in the past, do not occur.
It is safe to handle, and the speed of the input shaft is increased when there is surplus engine output, and the increased speed of the input shaft does not cause the engine load to become excessive and reduce the rotation of the handling drum. The speed of the input shaft can be increased while maintaining the input shaft properly, and even if the number of grain culms to be threshed decreases due to the discontinuation of the reaping operation and the proportion of broken culm straw waste included in the threshed material increases, the speed of the input shaft increases. Since the straw waste removal ability is improved by increasing the speed, it is possible to prevent an increase in the amount of straw waste mixed into the grains taken out from the threshing section, and it is possible to easily prevent the deterioration of the sorting function.

An embodiment of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a side view of the combine harvester, and Fig. 2 is a plan view of the same.
3 is a machine base that is fixedly supported on the truck frame 1; 4 is a threshing section with a feed chain 5 stretched on the left side and a handling cylinder 6 built therein; 7 is a rotation fulcrum shaft 8 Hydraulic cylinder 9
10 is a straw removal cutter facing the straw removal chain 11 connected to the terminal end of the feed chain 5; 12 is a straw removal cutter that is raised and lowered by the feed chain 5;
A waste straw collection table that takes out waste straw in an unprocessed state through a
13 is a paddy tank facing the grain lifting cylinder 14, 15
17 is an engine equipped with an intake cylinder 16 connected to the rear of the tank 13, and 17 is a driver's cab equipped with a driver's seat 18 and a driving operation section 19, and is configured to continuously reap and thresh grain culms. Furthermore, FIG. 3 is a cross-sectional side view of the main part, and 20 in the figure is a crimp net stretched below the handling chamber 21 containing the handling cylinder 6;
2 is a swing sorting machine which is a threshing drive device that is supported swingably in the front and rear directions via swing links 23 and 24, and the sorting board 22 includes a feed pan 25 located below the crimp net 20 and a crimp net. 20 and a movable chaff sheave 27 located below the dust exhaust port 26, a fixed chaf sheave 28 located below the dust exhaust port 26, a sorting net 29 located below each chaf sheave 27, 28, and a movable chaff sheave 27 located below the chaff sheave 28, which are connected to each other at the rear of the chaf sheave 28. It includes a stroke rack 30 and a grain board 31 located at the rear and lower part of the stroke rack 30. In the figure, 32 is a threshing drive device that blows air in the direction of the sorting net 29, 33 is an Ichiban conveyor that is installed in the Ichiban gutter 34 and connects the lifting cylinder 14 to take out fine grains, and 35 is the Ichiban conveyor that takes out fine grains. The second reduction product (paddy and straw waste) is installed inside the gutter 36 and connected to the second reduction thrower 37.
38 is a third gutter forming a third port 39 for discharging straw waste; 40 is a dust suction/exhaust fan located above the rear part of the swinging sorting board 22; 41 is the fan 40; The fourth gutter that covers the upper side of the
Reference numerals 42 and 43 are straw disposal switching plates for opening and closing the upper surface of the cutter 10.

Furthermore, in FIG. 2, 44 is a left and right side clutch lever, 45 is a reaping clutch lever, 46 is a threshing clutch lever, and 47 and 48 are installed in a handling opening 49 at the front of the handling chamber 21, and are inserted into the handling opening 49. This is a sensor for shallow handling and deep handling that detects the handling depth of grain culms.

As shown in FIG. 4, the oscillating sorting board 22 and the winnowing machine 32 are interlocked and connected to the output shaft 51 of the engine 15 through respective transmission mechanisms 50a and 50b, and each transmission mechanism 50a and 50b is a variable motor speed variable type. The V pulleys 52a, 52b are interlocked and connected to the engine output shaft 51 via pulley shafts 53a, 53b, and the driven variable V pulleys 54a, 54b are connected to the input shaft 55, which is the crank rotation shaft of the swing sorting board 22, and the winnowing drive. The output of the engine 15 is connected to the input shaft 56 via pulley shafts 57a, 57b, and V-belts 58a, 58b are stretched between the pulleys 52a, 52b, 54a, 54b to drive the output of the engine 15 in various ways. Oscillating sorting board 22 which is a device
and the winnowing machine 32, respectively, so that the transmission speed can be changed.

Also, the output rotating screw shafts 60a, 60b of the deceleration reversible speed change motors 59a, 59b that perform each speed change operation.
Shift hawks 61a, 61b and shifter 62
The V pulleys 52a, 52b via a, 62b
Mover elements 63a, 63 of shift hawks 61a, 61b are interlocked and connected to the screw shafts 60a, 60b when the motors 59a, 59b are driven in forward and reverse directions.
By appropriately moving and displacing the fulcrum shafts 64a and 64b, the V pulleys 52a and 52b
The transmission speed is adjusted by changing the groove widths D ₁ and D ₂ of the pulleys 54a and 54b to change the effective diameter of the pulleys.

FIG. 5 is an electrical circuit diagram, in which switch contacts 47a and 65a of the shallow handling sensor 47 and reaping clutch "off" detection switch 65 are connected in parallel to the battery 66, and the switch contacts 47
AND circuit 67 and drive circuit 6 to a, 65a
8, a relay coil 69 for normal rotation operation of the motors 59a, 59b is connected, and a relay coil 72 for reverse rotation operation of the motors 59a, 59b is connected via an AND circuit 67, a knot circuit 70, and a drive circuit 71. , said relay 69,
72 relay switches 69a, 72a are connected to the motors 59a, 59b, and the switch 4
The effective diameter of the V-pulleys 52a, 52b is increased by energizing the relay 69, turning on the relay switch 69a, and rotating the motors 59a, 59b in the forward direction only when the V pulleys 7a, 65a are on. Further, the effective diameters of the V-pulleys 54a and 54b are made small so that the transmission speed thereof can be varied at high speed. Note that 73 and 74 in the figure are limit switches. As is clear from the above, in the combine threshing drive device in which the input shafts 55 and 56 that drive the swinging sorting board 22 and the winnowing machine 32 of the threshing section 4 are provided with transmission mechanisms 50a and 50b, a sensor detects the discontinuation of the reaping operation. The detection switch 65 is provided so that when the reaping operation is stopped, the detection switch 65 automatically increases the speed of the transmission mechanisms 50a and 50b.

The present embodiment is configured as described above, and the grain culm cut by the reaping section 7 is transferred to the feed chain 5 via a vertical conveyance mechanism or the like, and is transferred to the handling port 49.
The reaping clutch lever 45 is now in the "off" state, and the switch 65 detects this, and
When the reaped grain culm is no longer fed to the handling port 49 and the shallow handling sensor 47 is in a non-detecting state of the grain culm, the sensor 47 and the switch contacts 47a, 65a of the switch 65 are both turned on, and one of the grain culms is turned on. The relay 69 is energized and this relay switch 69
a is turned on, while the other relay 69 is de-energized and this relay switch 72a is turned off.As a result, the motors 59a and 59b are driven in the normal rotation, and the shift forks 61a and 61b are driven to the fourth position. V pulleys 52a, 5 are moved to the virtual line state in the figure.
The groove width _D1 of 2b is made small, and the V pulleys 54a, 5
By adjusting the groove width _D2 of 4b to a large value and changing the transmission speed to a high speed, the feed speed of the swing sorting board 22 and the rotation speed of the winnowing machine 32 are increased. As a result, the feeding on the oscillating sorting board 22 is promoted, and pieces of culm etc. are prevented from falling into the first mouth.
The amount and speed of the air for selection from No. 2 are increased, the air selection effect becomes even more powerful, and the contamination of culm pieces in the first mouth is further prevented. Therefore, when the machine is moving around or during manual handling work where the shallow handling sensor 47 is not detected during reaping "cutting", the swing sorting board 22 and the winnowing machine 32 are automatically driven at high speed. These sorting actions are promoted, and inconveniences such as the occurrence of many culm breaks when the amount of threshing is small in the conventional non-reaping operation and a large amount of culm breaks mixed in at the top of the grain can be effectively resolved.

As is clear from the above embodiments, the present invention has a transmission mechanism 50 on the input shafts 55 and 56 that drive the threshing section 4.
In the threshing drive device of the combine, a sensor 65 is provided to detect the discontinuation of the reaping operation, and when the reaping operation is discontinued, the speed change mechanism 50a, 50b is automatically controlled to increase the speed by the sensor 65. Due to the suspension of the reaping operation, the input shaft 5
5 and 56 are increased in speed, the engine 15 does not have problems such as overloading and stopping as in the past, and can be handled safely, and even if the engine 15 has surplus output. Input shaft 5
5 and 56 are increased in speed, the load on the engine 15 becomes excessive due to the increased speed of the input shafts 55 and 56, and the 6 rotations of the handling cylinder are not reduced, but the input is made while maintaining the proper 6 rotations of the folding cylinder. In addition to being able to increase the speed of the input shafts 55, 56, even if the number of grain culms to be threshed decreases due to the suspension of the reaping operation and the proportion of culm broken straw waste included in the threshed material increases, the speed of the input shafts 55, 56 can be increased. Since the straw waste removal ability is improved by increasing the speed, it is possible to prevent an increase in the amount of straw waste mixed into the grains taken out from the threshing section 4, and it is possible to easily prevent the deterioration of the sorting function. It is.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is an overall side view of the combine harvester, Fig. 2 is a plan view thereof, Fig. 3 is a cross-sectional side view of the threshing section, and Fig. 4 is a main part of the combine harvester. The explanatory diagram, FIG. 5, is an electric circuit diagram. 4... Threshing section, 22, 32... Threshing drive device,
50a, 50b...speed change mechanism, 55, 56...input shaft.

Claims (1)

[Scope of utility model registration request] In a combine threshing drive device in which transmission mechanisms 50a and 50b are provided on input shafts 55 and 56 that drive the threshing section 4, a sensor 65 is provided to detect discontinuation of reaping work, and when the reaping work is discontinued, the sensor 65 detects A threshing drive device for a combine harvester, characterized in that the speed change mechanisms 50a and 50b are configured to automatically increase speed.