JP7441386B1 - combine - Google Patents

Abstract

[Problem] There is a combine harvester in which left and right running crawlers are each driven by an electric motor, and the regenerative power generated when decelerating or stopping is used to generate electricity. However, the running system of the combine harvester, which runs at low speeds, cannot secure sufficient electric power, and the operating time of the battery is only slightly extended. Therefore, a combine harvester equipped with a power generation hydraulic motor that is driven by pressure oil supplied from a hydraulic pump to generate electricity when the hydraulic actuator is not operated is provided. [Solution] A direction control valve 31 is provided to switch the feeding direction of pressure oil supplied from a hydraulic pump 30 to the hydraulic actuators 10, 16, 17 side and the power generation hydraulic motor 32 side, and the hydraulic actuators 10, 16, 17 are controlled by the hydraulic pressure. When not operating with the pressure oil supplied from the pump 30, the pressure oil supplied from the hydraulic pump 30 is sent to the power generation hydraulic motor 32, and the electric power generated by the power generation hydraulic motor 32 is stored in power storage devices 34, 35. [Selection diagram] Figure 2

Description

The present invention relates to a combine harvester equipped with a hydraulic motor for power generation.

There is a combine harvester in which the left and right traveling crawlers are each driven by an electric motor, and the regenerative power generated during deceleration or stop is used to generate electricity to obtain electric power (see Patent Document 1).

Japanese Patent Application Publication No. 2012-050356

However, the running system of the combine harvester, which runs at low speeds, cannot secure sufficient power by itself, and the operating time of the battery is only slightly extended.

The present invention has been made in view of the above, and an object of the present invention is to provide a combine harvester equipped with a power generation hydraulic motor that is driven by pressure oil supplied from a hydraulic pump to generate electricity when the hydraulic actuator is not operated.

A first aspect of the present invention provides a combine harvester in which a reaping device (15) and a threshing device (6) are provided on a chassis (2) equipped with a traveling device (4), in which supply pressure oil is sent from a hydraulic pump (30). A directional control valve (31) is provided to switch the direction between the hydraulic actuator (10, 16, 17) side and the power generation hydraulic motor (32) side, and the hydraulic actuator (10, 16, 17) is supplied from the hydraulic pump (30). When not operating with pressure oil, the pressure oil supplied from the hydraulic pump (30) is sent to the power generation hydraulic motor (32), and the electric power generated by the power generation hydraulic motor (32) is stored in the power storage device (34, 35). ,
Hydraulic actuators (10, 16, 17) raise and lower an auger lift cylinder (10) that raises and lowers a grain auger (8), a reaping lift cylinder (16) that raises and lowers a reaping device (15), and/or a vehicle platform (2). The auger lifting cylinder (10), the reaping lifting cylinder (16), and the pitching cylinder (17) are extended by pressure oil supplied from the hydraulic pump (30), and each part ( 8, 15, 2), and lowers each part (8, 15, 2) of the auger lifting cylinder (10), reaping lifting cylinder (16), or/and pitching cylinder (17). The waste oil from the reduction is sent to the power generation hydraulic motor (32),
A flow rate adjustment valve (37) in the oil path from the auger lift cylinder (10), reaping lift cylinder (16), and/or pitching cylinder (17) to the power generation hydraulic motor (32) adjusts the flow rate by operating the flow rate control dial. established,
The power storage device (34, 35) is a capacitor (34) and a battery (35) to which power is transferred from the capacitor (34),
The engine (22) is provided with a variable voltage alternator (36) and an engine ECU that controls and manages the operation of the engine (22) and monitors the load, and the engine ECU detects an increase in the load of the engine (22); In addition, when the charge amount of the capacitor (34) and battery (35) detected by the battery ECU is more than a predetermined amount, the voltage generated by the variable voltage alternator (36) is reduced to reduce the operating load of the alternator (36). This is a combine harvester that is characterized by reducing the
The second aspect of the present invention is that a discharge drive electric motor (44) is provided to drive a grain discharge mechanism (40, 42, 43) that discharges grains stored in the grain tank (7) to the outside of the machine. This is the first feature of the combine harvester of the present invention.
The third aspect of the present invention provides a discharge on/off switch that turns on and off the drive of the discharge drive electric motor (44), and when the discharge on/off switch is turned on and the discharge drive electric motor (44) is driven, the engine ECU This is a combine harvester according to a second aspect of the present invention, characterized in that the rotational speed of the engine (22) is lowered to an idling state.
A fourth aspect of the present invention is the combine harvester according to the second or third aspect of the present invention, characterized in that a discharge speed dial is provided to increase or decrease the rotational output of the discharge drive electric motor (44).
A first invention related to the present invention is a combine harvester in which a reaping device 15 and a threshing device 6 are provided on a chassis 2 equipped with a traveling device 4. A directional control valve 31 is provided to switch between the 16, 17 side and the power generation hydraulic motor 32 side, and when the hydraulic actuators 10, 16, 17 are not operated with the pressure oil supplied from the hydraulic pump 30, the pressure oil supplied from the hydraulic pump 30 is used to generate electricity. This is a combine harvester that sends power to a power generation hydraulic motor 32 and stores power generated by the power generation hydraulic motor 32 in power storage devices 34 and 35.

According to the first invention related to the present invention , the direction control valve 31 is provided to switch the feeding direction of the pressure oil supplied from the hydraulic pump 30 to the hydraulic actuators 10, 16, 17 side and the power generation hydraulic motor 32 side, When the hydraulic actuators 10, 16, and 17 are not operated with the pressure oil supplied from the hydraulic pump 30, the pressure oil supplied from the hydraulic pump 30 is sent to the power generation hydraulic motor 32, and the electric power generated by the power generation hydraulic motor 32 is stored in the power storage device. 34 and 35, so when the hydraulic actuators 10, 16, and 17 are not operated with the pressure oil supplied from the hydraulic pump 30, the pressure oil supplied from the hydraulic pump 30 is sent to the power generation hydraulic motor 32, and the generated power is stored. Power can be stored in the devices 34 and 35 and used as power consumed by electric components.

A second invention related to the present invention is that hydraulic actuators 10, 16, and 17 raise and lower an auger raising/lowering cylinder 10 for raising and lowering a grain auger 8, a reaping raising/lowering cylinder 16 for raising and lowering a reaping device 15, and/or a vehicle platform 2. It is a pitching cylinder 17 that controls longitudinal inclination, and is a single-acting hydraulic system in which the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 extend with pressure oil supplied from the hydraulic pump 30 to raise each part 8, 15, 2. This is a cylinder, and waste oil caused by contraction when lowering each part 8, 15, 2 of the auger lifting cylinder 10, reaping lifting cylinder 16, and/or pitching cylinder 17 is sent to the power generation hydraulic motor 32. This is a combine harvester according to the invention of No. 1 .

A third invention related to the present invention is a combine of the first or second invention related to the present invention, wherein the power storage devices 34 and 35 are a capacitor 34 and a battery 35 to which electric power is transferred from the capacitor 34.

According to the third invention related to the present invention , since the power storage devices 34 and 35 are the capacitor 34 and the battery 35 to which power is transferred from the capacitor 34, by using the capacitor 34 and the battery 35 together, the battery 35 Even when the amount of charge is large, electricity can be stored in the capacitor 34, thereby suppressing energy loss and preventing the battery 35 from deteriorating due to load caused by overfilling.

A fourth invention related to the present invention is a flow rate adjustment valve that adjusts the flow rate by operating a flow rate adjustment dial in an oil path from the auger lifting cylinder 10, the reaping lifting cylinder 16, or/and the pitching cylinder 17 to the power generation hydraulic motor 32. 37 is a second invention related to the present invention .

According to the fourth invention related to the present invention , the flow rate is adjusted by operating a flow rate adjustment dial in the oil path from the auger lifting cylinder 10, the reaping lifting cylinder 16, and/or the pitching cylinder 17 to the power generation hydraulic motor 32. Since the adjustment valve 37 is provided, by reducing the flow rate, it is possible to adjust the descending speed of each part 8, 15, 2 due to the reduction of the auger lifting cylinder 10, reaping lifting cylinder 16, and/or pitching cylinder 17. It allows for proper positioning and allows for good work.

Furthermore, when the flow rate is increased, the amount of power generated by the power generation hydraulic motor 32 increases (priority is given to power generation by regenerative power generation), and a decrease in work efficiency due to power shortage can be prevented.

A fifth invention related to the present invention is that the engine 22 is provided with a variable voltage alternator 36 and an engine ECU that controls and manages the operation of the engine 22 and monitors the load, and the engine ECU monitors the load increase state of the engine 22. The present invention reduces the voltage generated by the variable voltage alternator 36 to reduce the operating load of the alternator 36 when the amount of charge of the capacitor 34 and battery 35 detected by the battery ECU is greater than a predetermined amount. It is a combine harvester of the first or second invention related to .

According to the fifth invention related to the present invention , the engine 22 is provided with a variable voltage alternator 36 and an engine ECU that controls and manages the operation of the engine 22 and monitors the load, and the engine ECU increases the load on the engine 22. If the state is detected and the amount of charge of the capacitor 34 and battery 35 detected by the battery ECU is greater than a predetermined amount, the voltage generated by the variable voltage alternator 36 is reduced to reduce the operating load of the alternator 36. Therefore, when the engine load of the reaping device 15 and the threshing device 6 for harvesting, threshing and sorting of grain culms increases, by reducing the operating load of the alternator 36, the drive to the reaping device 15 and the threshing device 6 is reduced. In addition to increasing power and allowing harvesting work to be carried out properly, it also reduces fuel consumption and extends operating time.

A sixth invention related to the present invention is that the engine 22 is provided with a variable voltage alternator 36 and an engine ECU that controls and manages the operation of the engine 22 and monitors the load, and the engine ECU monitors the load increase state of the engine 22. The present invention reduces the voltage generated by the variable voltage alternator 36 to reduce the operating load of the alternator 36 when the amount of charge of the capacitor 34 and battery 35 detected by the battery ECU is greater than a predetermined amount. This is a combine harvester according to a third invention related to .

A seventh invention related to the present invention is that the engine 22 is provided with a variable voltage alternator 36 and an engine ECU that controls and manages the operation of the engine 22 and monitors the load, and the engine ECU monitors the load increase state of the engine 22. The present invention reduces the voltage generated by the variable voltage alternator 36 to reduce the operating load of the alternator 36 when the amount of charge of the capacitor 34 and battery 35 detected by the battery ECU is greater than a predetermined amount. This is a combine harvester according to a fourth invention related to .

An eighth invention related to the present invention is related to the present invention , which is provided with a discharge drive electric motor 44 that drives grain discharge mechanisms 40, 42, and 43 that discharge grains stored in the grain tank 7 to the outside of the machine. This is the combine harvester of the first invention .

According to the eighth invention related to the present invention , a discharge drive electric motor 44 is provided that drives the grain discharge mechanisms 40, 42, and 43 that discharge grains stored in the grain tank 7 to the outside of the machine. A drive mechanism from the engine 22 to the grain discharge mechanisms 40, 42, and 43 is not required, and the number of parts and weight of the machine body can be reduced.

A ninth invention related to the present invention is that a discharge on/off switch is provided to turn on and off the drive of the discharge drive electric motor 44, and when the discharge on/off switch is turned on and the discharge drive electric motor 44 is driven, the engine ECU This is an eighth aspect of the combine harvester related to the present invention that reduces the rotational speed of the engine 22 to an idling state.

According to the ninth invention related to the present invention , a discharge on/off switch is provided to turn on and off the drive of the discharge drive electric motor 44, and when the discharge on/off switch is turned on and the discharge drive electric motor 44 is driven, the engine ECU Since the rotation speed of the engine 22 is lowered to the idling state, when the ejection on/off switch is turned on and grain ejection work is performed, the rotation speed of the engine 22 is reduced to the idling state, reducing fuel consumption during grain ejection. and exhaust gas emissions.

The tenth invention related to the present invention is the combine harvester of the eighth or ninth invention related to the present invention, which is provided with a discharge speed dial for increasing or decreasing the rotational output of the discharge drive electric motor 44.

According to the tenth invention related to the present invention , since the discharge speed dial is provided to increase or decrease the rotational output of the discharge drive electric motor 44, the rotation output of the discharge drive electric motor 44 can be increased or decreased using the discharge speed dial. For example, when shedding (separation of rice husks) is likely to occur during discharge, the rotational output can be lowered to reduce the grain discharge conveyance speed to prevent shedding during discharge, which may affect the quality of the harvest. This can be prevented from decreasing.

FIG. 1 is a left side view of a combine harvester according to an embodiment of the present invention. It is a hydraulic circuit diagram for explaining the operation of the combine harvester. It is a right side view for explaining grain discharge from the grain tank of the combine harvester.

EMBODIMENT OF THE INVENTION Hereinafter, the combine 1 which is one embodiment of this invention is demonstrated with reference to an accompanying drawing. In order to make it easier to understand, directions are conveniently shown and explained with the front as the front, the rear as the rear, the right hand side as the right side, and the left hand side as the left side, as seen from the operator. The configuration is not limited.

As shown in FIG. 1, the combine 1 is equipped with a traveling device 4 having a pair of left and right traveling crawlers 3 running on the soil surface on the lower side of the chassis 2. A threshing device 6 that threshes and sorts the grain culms that are conveyed and fed while being held by the chain 5, a grain tank 7 that temporarily stores the grains, and a grain tank 7 that discharges the grains stored in the grain tank 7 to the outside of the machine. A threshing auger 8 is mounted and disposed, and a straw processing device 9 is installed at the rear end of the threshing device 6. The grain removal auger 8 operates an auger lifting cylinder 10 to raise and lower when grains are discharged.

In front of the threshing device 6, there is a weeding body 11 for weeding uncut grain culms from the front end side, a pulling part 12 for raising the parted grain culms, a cutting blade part 13 for reaping the raised grain culms, and a reaped grain culm. A reaping device 15 having a supply adjustment conveyance section 14 for raking the culm, adjusting the handling depth during conveyance and handing over to the feed chain 5, etc. is made to be able to be raised and lowered with respect to the soil surface by a reaping lifting cylinder 16. It is configured by being suspended from the front end of the chassis 2.

The chassis 2 is made horizontal in the longitudinal direction by changing the inclination in the longitudinal direction with respect to the traveling device 4 using a pitching cylinder 17.

An operating device 20 for controlling the operation of the combine and an operating seat 21 on which an operator sits are provided at the rear upper part of the reaping device 15, an engine 22 is mounted below the operating seat 21, and the grain tank is mounted on the rear side. 7, and a cabin 23 that covers the operating device 20 and the operating seat 21 is provided, and these traveling device 4, threshing device 6, reaping device 15, operating device 20, engine 22, cabin 23, etc. are mounted on the chassis 2 of the combine harvester. Installing.

In the operation seat 21, there is a main shift lever 24 that switches the vehicle platform 2 forward and backward and transmits the main gear shift by operating the operator forward and backward, and a main shift lever 24 that performs left and right steering operations when traveling straight and turning operations in various turning modes by tilting to the left and right sides. A power steering lever 25 for performing the operation is disposed on one side of the operating device 20.

The operating configuration of the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 will be described based on FIG. 2.

The auger elevating cylinder 10, the reaping elevating cylinder 16, and the pitching cylinder 17 are single-acting hydraulic cylinders that extend and operate with pressure oil supplied from a hydraulic pump 30 driven by the engine 22, and contract by draining the oil. .

The oil path for supplying pressure oil from the hydraulic pump 30 is switched by a directional control valve 31 into an oil path to be sent to the auger lifting cylinder 10, a reaping lifting cylinder 16, and a pitching cylinder 17, and an oil path to be sent to the power generation hydraulic motor 32.

The auger elevating cylinder 10 is telescopically operated by operating an auger elevating switch, which is one of the operating devices 20, to switch the direction control valve 31 and the auger elevating hydraulic valve 33a, thereby elevating and lowering the grain shredding auger 8.

That is, when the auger lift switch is operated upward, the directional control valve 31 is switched to the oil path for sending oil to the auger lift cylinder 10, the reaping lift cylinder 16, and the pitching cylinder 17, and the auger lift hydraulic valve 33a changes the supply pressure from the hydraulic pump 30. The direction is switched to feed oil into the auger lifting cylinder 10, the auger lifting cylinder 10 is extended, and the grain removal auger 8 is raised.

When the auger lift switch is operated downward, the direction control valve 31 is switched to the oil path that sends oil to the power generation hydraulic motor 32, and the auger lift hydraulic valve 33a is switched to drain oil from the auger lift cylinder 10. is reduced and the threshing auger 8 is lowered.

Therefore, the pressure oil discharged from the auger lift cylinder 10 and the pressure oil supplied from the hydraulic pump 30 due to the downward operation of the auger lift switch drive the power generation hydraulic motor 32 to generate electricity. The generated power is stored in the capacitor 34.

The reaping lift cylinder 16 is telescopically operated by switching the directional control valve 31 and the reaping lift hydraulic valve 33b by operating a sensor that detects the ground height of the reaping device 15 or a reaping lift switch which is one of the operating devices 20. Then, the reaping device 15 is raised and lowered.

That is, when the sensor detecting the height of the reaping device 15 above the ground detects that the height above the ground is lower than the set value, or when the reaping lift switch is operated upward, the directional control valve 31 moves the auger lift cylinder 10, the reaping lift cylinder 16, and The oil path is switched to the oil path to be sent to the pitching cylinder 17, the reaping lift hydraulic valve 33b is switched to send the supply pressure oil from the hydraulic pump 30 to the reaping lift cylinder 16, the reaping lift cylinder 16 is extended, and the reaping device 15 rises.

When the sensor detecting the height of the reaping device 15 above the ground detects that the height above the ground is higher than the set value or when the reaping lift switch is operated downward, the directional control valve 31 switches to the oil path that sends the oil to the hydraulic motor 32 for power generation. , the reaping lift hydraulic valve 33b is switched to the direction of draining oil from the reaping lift cylinder 16, the reaping lift cylinder 16 is contracted, and the reaping device 15 is lowered.

Therefore, the pressure oil discharged from the reaping lift cylinder 16 and the hydraulic pump due to the detection by the sensor that detects the height above the ground of the reaping device 15 that the height above the ground is higher than the set value or when the reaping lift switch is operated downward. The pressure oil supplied from 30 drives a power generation hydraulic motor 32 to generate electricity. The generated power is stored in the capacitor 34.

The pitching cylinder 17 is telescopically operated by switching the direction control valve 31 and the pitching hydraulic valve 33c by operating the pitching manual switch, which is one of the sensors or the operating device 20, which detects the longitudinal inclination of the vehicle chassis 2. The front and back inclinations are controlled by raising and lowering the front side of the vehicle.

That is, when a sensor that detects the longitudinal inclination of the chassis 2 detects that the front part of the chassis 2 is tilted forward or backward, or if the pitching manual switch is operated to raise the front part, the direction control valve 31 is activated to move the auger lift cylinder 10 and the pitching cylinder. 17 and the oil passage to the pitching cylinder 17, the pitching hydraulic valve 33c is switched to the direction of feeding the supply pressure oil from the hydraulic pump 30 to the pitching cylinder 17, the pitching cylinder 17 is extended, and the front part of the chassis 2 is rises.

When a sensor that detects the longitudinal inclination of the chassis 2 detects that the front part of the chassis 2 is highly inclined longitudinally or when the pitching manual switch is operated to lower the front part, the directional control valve 31 opens an oil path to the power generation hydraulic motor 32. The pitching hydraulic valve 33c is switched to the direction of draining oil from the pitching cylinder 17, the pitching cylinder 17 is operated to contract, and the front portion of the vehicle chassis 2 is lowered.

Therefore, the pressure oil drained from the pitching cylinder 17 due to detection of a high longitudinal inclination of the front part of the chassis 2 by a sensor that detects the longitudinal inclination of the chassis 2, or by operating the pitching manual switch to lower the front part. The pressure oil supplied from the hydraulic pump 30 drives the power generation hydraulic motor 32 to generate electricity. The generated power is stored in the capacitor 34.

As described above, when extending the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 to raise each part, the directional control valve 31 supplies pressure oil from the hydraulic pump 30 to the auger lifting cylinder 10, the pitching cylinder 17, and the pitching cylinder 17. The oil path is switched to the oil path that feeds the cylinder 17 and the pitching cylinder 17.

Further, when the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 are contracted to lower each part, the directional control valve 31 sends the pressure oil supplied from the hydraulic pump 30 to the power generation hydraulic motor 32. At the same time, the pressure oil discharged from the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 is sent to the power generation hydraulic motor 32, which drives the power generation hydraulic motor 32 to generate electricity. The generated power is stored in the capacitor 34.

Therefore, when reducing the auger lifting cylinder 10, reaping lifting cylinder 16, and pitching cylinder 17 and lowering each part, the pressure oil drained from the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 and the hydraulic pump The power generation hydraulic motor 32 is driven by the pressure oil supplied from 30 to generate electricity. The generated power is stored in the capacitor 34 and can be used as power consumed by the electric components of each part.

Furthermore, since the generated power is stored in the capacitor 34, it is possible to prevent the battery 35 from being overcharged and deteriorating.

A battery ECU is provided to control and manage discharging and charging of the capacitor 34 and the battery 35 and to monitor the charging rate, and when there is a margin in the charging rate of the battery 35, power is transferred from the capacitor 34 to the battery 35.

Note that if the charging rates of the capacitor 34 and the battery 35 are both full (100%), even if the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 are reduced and each part is lowered, the directional control valve 31 is not switched to the oil path that sends the pressure oil supplied from the hydraulic pump 30 to the power generation hydraulic motor 32 (the power generation hydraulic motor 32 is not driven by the pressure oil supplied from the hydraulic pump 30 to generate power). Therefore, it is possible to prevent the capacitor 34 and the battery 35 from being overcharged and being deteriorated or damaged.

Further, an engine ECU is provided that controls and manages the operation of the engine 22 and monitors the load, so that the engine ECU detects an increase in the load of the engine 22 (fuel injection amount greater than a predetermined amount), and the battery ECU detects an increase in the load of the engine 22 (fuel injection amount exceeding a predetermined amount). And when the amount of charge of the battery 35 is more than a predetermined amount (for example, 50%), the voltage generated by the variable voltage alternator 36 is reduced (reduced from 25V to 12V) to reduce the operating load of the alternator 36. By doing so, the driving force to the harvesting work unit such as the threshing device 6 is increased so that the harvesting work can be performed properly, and the operating time is extended by reducing fuel consumption.

In addition, the pressure oil discharged from the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 is sent to the hydraulic motor 32 for power generation. A flow rate adjustment valve 37 is provided to adjust the flow rate.

When the flow rate adjustment dial is operated to reduce the flow rate of the flow rate adjustment valve 37, the flow rate of the pressure oil discharged from the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 is sent to the power generation hydraulic motor 32. Therefore, the reduction operation of the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 is slowed down, and the lowering speed of each part is slowed, so that the lowering position of each part can be set appropriately, and good work can be performed.

That is, when the reduction operation of the auger lifting cylinder 10 becomes slow and the descending speed of the grain threshing auger 8 becomes slow, the grain discharge port at the tip of the grain threshing auger 8 can be appropriately aligned with the position of the grain collection container, which is good. Can perform various tasks.

Further, when the reduction operation of the reaping lifting cylinder 16 becomes slow and the descending speed of the reaping device 15 becomes slow, the height of the reaping device 15 from the ground can be adjusted appropriately, and good work can be performed.

Moreover, when the reduction operation of the pitching cylinder 17 becomes slow and the lowering speed of the front part of the vehicle chassis 2 becomes slow, the inclination of the chassis 2 can be appropriately adjusted (pitching control is operated appropriately) and good work can be performed.

On the other hand, when the flow rate adjustment dial is operated to increase the flow rate of the flow rate adjustment valve 37, the flow rate of the pressure oil discharged from the auger lifting cylinder 10, the reaping lifting cylinder 16, and the pitching cylinder 17 is sent to the power generation hydraulic motor 32. As a result, the amount of power generated by the power generation hydraulic motor 32 increases (priority is given to power generation by regenerative power generation), and it is possible to prevent a decrease in work efficiency due to power shortage.

Next, based on FIG. 3, a horizontal discharge spiral 40 provided at the bottom of the grain tank 7 and a vertical discharge tube 41 for discharging the grains stored in the grain tank 7 to the outside of the machine using the grain threshing auger 8 are shown. The drive structure of the vertical discharge spiral 42 and the auger discharge spiral 43 in the grain removal auger 8 will be described in detail. The grain discharge mechanism includes a horizontal discharge spiral 40, a vertical discharge spiral 42, and an auger discharge spiral 43.

The grain tank 7 is disposed on the right side of the rear part of the vehicle chassis 2, and has a general configuration in which a rotation fulcrum is provided on the rear side and the front side rotates toward the outside of the aircraft body to perform maintenance.

A horizontal discharge spiral 40 is provided at the bottom inside the grain tank 7 to send the grains in the grain tank 7 to the bottom of the vertical discharge tube 41, and a vertical discharge spiral 42 is provided in the vertical discharge tube 41 to discharge the grains. The grains are fed to the base of the grain auger 8, and an auger discharge spiral 43 is provided inside the grain auger 8, and the grains are discharged to the outside of the machine from the discharge port 8a at the tip of the grain threshing auger 8.

A discharge drive electric motor 44 is fixed to the lower part of the front part of the grain tank 7, and when the grain tank 7 is rotated around the rotational fulcrum on the rear side with the front side facing the outside of the fuselage, the discharge drive electric motor 44 is fixed. At the same time, the aircraft rotates outward.

The drive shaft of the discharge drive electric motor 44 is connected to the front end of the helical shaft of the lateral discharge spiral 40 and rotationally drives the lateral discharge spiral 40 .

The rear end of the helical shaft of the horizontal discharge spiral 40 is drivingly connected to the lower end of the helical shaft of the vertical discharge spiral 42 by a bevel gear, and drives the vertical discharge spiral 42 to rotate.

The upper end of the helical shaft of the vertical discharge spiral 42 is drivingly connected to the base end of the helical shaft of the auger discharge spiral 43 by a bevel gear, and drives the auger discharge spiral 43 to rotate.

Therefore, since the discharge drive electric motor 44 rotationally drives the horizontal discharge spiral 40, the vertical discharge spiral 42, and the auger discharge spiral 43, a drive mechanism from the engine 22 to the horizontal discharge spiral 40, etc. is not required, and the number of parts can be reduced. The weight of the aircraft can be reduced.

Further, a discharge on/off switch, which is one of the operating devices 20 for turning on and off the drive of the discharge drive electric motor 44, is provided, and when the discharge on/off switch is turned on to drive the discharge drive electric motor 44, the engine ECU The rotational speed of the engine 22 is lowered to an idling state (1,200 rpm). Note that control to lower the engine 22 to an idling state (1,200 rpm) by this engine ECU is performed with priority over other engine speed controls.

Therefore, since the engine 22 is reduced to an idling state (1,200 rpm) when the discharge on/off switch is turned on to perform the grain discharge operation, fuel consumption and exhaust gas emissions during grain discharge can be suppressed.

Further, a discharge speed dial, which is one of the operating devices 20 for increasing or decreasing the rotational output of the discharge drive electric motor 44, is provided.

Therefore, the rotational output of the discharge drive electric motor 44 can be increased or decreased using the discharge speed dial. For example, when husking (peeling of the rice husks) tends to occur during discharge, the rotational output can be lowered to remove the grains. By lowering the discharge conveyance speed, it is possible to prevent deterioration in the quality of the harvest due to shedding during the discharge operation.

2 Vehicle chassis 4 Traveling device 6 Threshing device 7 Grain tank 8 Threshing auger 10 Hydraulic actuator (auger lifting cylinder)
15 Reaping device 16 Hydraulic actuator (reaping lifting cylinder)
17 Hydraulic actuator (pitting cylinder)
22 Engine 30 Hydraulic pump 31 Directional control valve 32 Hydraulic motor for power generation 34 Power storage device (capacitor)
35 Power storage device (battery)
36 Alternator 37 Flow rate adjustment valve 40 Grain discharge mechanism (lateral discharge spiral)
42 Grain discharge mechanism (vertical discharge spiral)
43 Grain discharge mechanism (auger discharge spiral)
44 Discharge drive electric motor

Claims (4)

In a combine harvester in which a reaping device (15) and a threshing device (6) are installed on a chassis (2) equipped with a traveling device (4), the feeding direction of pressure oil supplied from a hydraulic pump (30) is controlled by a hydraulic actuator (10, A directional control valve (31) is provided to switch between the hydraulic actuators (10, 16, 17) and the power generation hydraulic motor (32), and the hydraulic pressure is switched on when the hydraulic actuators (10, 16, 17) are not operated with the pressure oil supplied from the hydraulic pump (30). Sending the supply pressure oil from the pump (30) to the power generation hydraulic motor (32), storing the electric power generated by the power generation hydraulic motor (32) in the power storage device (34, 35),
Hydraulic actuators (10, 16, 17) raise and lower an auger lift cylinder (10) that raises and lowers a grain auger (8), a reaping lift cylinder (16) that raises and lowers a reaping device (15), and/or a vehicle platform (2). The auger lifting cylinder (10), the reaping lifting cylinder (16), and the pitching cylinder (17) are extended by pressure oil supplied from the hydraulic pump (30), and each part ( 8, 15, 2), and lowers each part (8, 15, 2) of the auger lifting cylinder (10), reaping lifting cylinder (16), or/and pitching cylinder (17). The waste oil from the shrinkage is sent to the power generation hydraulic motor (32),
A flow rate adjustment valve (37) in the oil path from the auger lift cylinder (10), reaping lift cylinder (16), and/or pitching cylinder (17) to the power generation hydraulic motor (32) adjusts the flow rate by operating the flow rate control dial. established,
The power storage device (34, 35) is a capacitor (34) and a battery (35) to which power is transferred from the capacitor (34),
The engine (22) is provided with a variable voltage alternator (36) and an engine ECU that controls and manages the operation of the engine (22) and monitors the load, and the engine ECU detects an increase in the load of the engine (22); In addition, when the charge amount of the capacitor (34) and battery (35) detected by the battery ECU is more than a predetermined amount, the voltage generated by the variable voltage alternator (36) is reduced to reduce the operating load of the alternator (36). A combine harvester characterized by reducing the Claim 1, further comprising a discharge drive electric motor (44) that drives a grain discharge mechanism (40, 42, 43) for discharging grains stored in the grain tank (7) to the outside of the machine. Combine as described. A discharge on/off switch is provided to turn on and off the drive of the discharge drive electric motor (44), and when the discharge on/off switch is turned on to drive the discharge drive electric motor (44), the engine ECU changes the rotational speed of the engine (22). 3. The combine harvester according to claim 2 , wherein the combine harvester lowers the engine to an idling state. The combine harvester according to claim 2 or 3, further comprising a discharge speed dial for increasing or decreasing the rotational output of the discharge drive electric motor (44).

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