combine

Abstract

To solve a conventional issue that, since transmission to a reaping device continues when a gear change lever is operated on an advancement side, the reaping device is kept in operation if an operator forgets to return the gear change lever to a neutral position when he / she is getting off a vehicle, which cannot ensure safety in clog-release work.SOLUTION: A combine includes: a reaping device 4 for reaping and conveying crops growing in a field; and a thresher 3 which receives and threshes the crop on a rear left side of the reaping device 4. A vehicle stop member 21 is provided which switches between transmission and block of a drive transmission by a continuously variable transmission 15 which transmits a drive power to a drive device 2 and a reaping device 4. When the vehicle stop member 21 is operated to either transmission state or block state, the continuous variable transmission 15 is stopped. When the vehicle stop member 21 is between transmission state and block state, a transmission path from the continuous variable transmission 15 to the drive device 2 is blocked and the drive power is transmitted to the reaping device 4.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a combine harvester. [Background technology]

[0002] Conventionally, the combine described in prior patent document 1 uses a harvesting device to cut and lift up the stalks growing in a field, sends the stalks along a conveying path to a threshing device, separates the grains in the threshing device, and then stores the grains in a storage tank.

[0003] When harvesting stalks growing close to the edge of a field using a combine harvester, the brake pedal is depressed near the edge of the field to activate the parking brake and disengage the side clutch, cutting off power to the traveling device. When the speed control lever is operated in this state to move forward, the driving force is transmitted to the reaping device, so the stalks in contact with the reaping device are cut, lifted up, and transported to the threshing device. This series of reaping operations along the ridges is called raking control, and is performed by depressing the brake pedal.

[0004] The above-mentioned raking control prevents the front end of the combine from coming into contact with ridges or walls and damaging them when harvesting stalks near the edge of the field, and also makes it easy to harvest crops near the edge of the field, reducing the amount of stalk left unharvested and eliminating the need to manually harvest stalks. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4710466 Summary of the Invention [Problem to be solved by the invention]

[0006] In the configuration of the above-mentioned known example, power transmission to the mowing device continues as long as the speed change lever is operated to the forward direction, so if the operator forgets to return the speed change lever to the neutral position when getting out of the vehicle, the mowing device will continue to operate.

[0007] At this time, if it appears that the machine has stopped operating due to a blockage of straw, the operator will often forget to return the gear lever to the neutral position and move outside the machine to clear the blockage.However, if the harvesting device is raised and the work to clear the blockage is carried out from below, there is a risk of contact with the rotating drive parts such as the cutting blade or star wheel, which poses a problem that the safety of the work to clear the blockage cannot be ensured.

[0008] To prevent the above problems from occurring, it is desirable to restrict the scraping control, which moves the harvested stalks to the threshing device on the spot, so that it can only be performed when an operator is on board the control unit.However, this requires adding a component to detect whether an operator is on board, which complicates the configuration.

[0009] The present application aims to improve the safety of operators when they have to get off the control section of a combine harvester due to a blockage of grain straw or the like. [Means for solving the problem]

[0010] In the invention of claim 1, a combine harvester is provided with a reaping device (4) that reaps and transports crops growing in a field, and a threshing device (3) that takes over the crops and threshes them on the left rear side of the reaping device (4), and The aforementioned A stopping member (21) is provided to switch between transmission and interruption of travel power by a continuously variable transmission (15) that transmits driving power to the harvesting device (4). 、 a posture detection member (27) for detecting whether the stopping member (21) is in a transmission state or between a transmission state and a disconnection state from the posture of the stopping member (21); and a disconnection detection member (28) for detecting whether the stopping member (21) is in a disconnection state. A speed change operation detection member (33) is provided to detect the operation of the speed change operation lever (16), and the output of the continuously variable transmission (15) increases or decreases as a result of the solenoid (34) operating in accordance with the amount detected by the speed change operation detection member (33). When the stopping member (21) is operated to the interrupt position and locked, the output to the forward solenoid (34) is stopped and the output of the continuously variable transmission (15) is set to "0." When the locked state of the stopping member (21) is released, the output to the forward solenoid (34) is restricted until a certain time has elapsed since the release operation. The combine harvester is characterized by the above.

[0013] Claim 2In the invention of The aforementioned The gear shift lever (16) is not in the neutral position. That When the neutral detection member (35) detects, The aforementioned Even if the locking state of the parking member (21) is released, The forward side 2. The combine harvester according to claim 1, wherein no output is given to the solenoid (34).

[0014] Claim 3 In the invention, when the stopping member (21) is in the blocking state, The aforementioned When the reaping device (4) is in operation, after a predetermined time has elapsed The aforementioned 2. The method according to claim 1, wherein the power transmission to the harvesting device (4) is cut off. or claim 2 The combine harvester is the one described in the above. [Effects of the Invention]

[0015] In the present invention, when the worker is not operating the stopping member 21 or when the stopping member 21 is locked, the continuously variable transmission 15 stops, thereby restricting the work of stopping the vehicle in place, raking in and transporting the straw, and moving it to the threshing device 3.This prevents the worker from getting off the machine while the harvesting device 4 is still running, ensuring safety when getting off.

[0016] When the operator operates the stopping member 21 between the transmission state and the disconnection state, the continuously variable transmission 15 operates and the transmission to the traveling device 2 is disconnected, allowing the vehicle to stop in place, such as at the edge of a field, rake in the straw, and transport it to the threshing device 3 efficiently. [Brief explanation of the drawings]

[0017] [Figure 1] Side view of a combine harvester. [Figure 2] Schematic plan view of the control section. [Figure 3] Schematic diagram of the transmission case. [Figure 4] FIG. 2 is a side view of the parking member (parking brake pedal). [Figure 5] Block diagram. [Figure 6] FIG. 10 is a block diagram of another embodiment. [Figure 7] FIG. 10 is a schematic plan view of a control section according to another embodiment.

[0018] One embodiment of the present invention will be explained with reference to the drawings. 1 is the combine body frame, 2 is the running gear below the body frame 1, 3 is the threshing device located on one side above the body frame 1, 4 is the reaping device, 5 is the grain tank located to the side of the threshing device 4, and 6 is the control unit.

[0019] The control section 6 is provided with a floor 10 where the operator stands, a driver's seat 11 where the operator sits, a front operation panel 12 and a side operation panel 13 provided in front of the driver's seat 11 and having switches and levers.

[0020] The engine rotation is continuously variable by a continuously variable transmission (HST) 15 and transmitted to the traveling device 2, causing the machine to travel, and the speed-changed rotation of the continuously variable transmission 15 transmitted to the traveling device 2 is transmitted to the reaping device 4, and the working speed of the reaping device 4 is synchronized with the traveling speed to perform reaping work.

[0021] The traveling speed of the traveling device 2 is changed by operating a continuously variable transmission 15 using a speed change operation lever (main speed change lever) 16 provided on the operating section 6.

[0022] Furthermore, the normal direction of travel of the traveling device 2 is controlled by a power steering lever 17 provided on the control unit 6. When the power steering lever 17 is tilted to the left or right, for example, the left and right side clutches 19 of the transmission case 18 are disengaged, changing the traveling direction of the vehicle (FIG. 3). Furthermore, when the power steering lever 17 is tilted further, the left and right brakes 20 of the transmission case 18 are activated, causing the vehicle to turn.

[0023] When the power steering lever 17 is tilted forward, the upper and lower cutting cylinders 14 are contracted, lowering the cutting device 4, and when the power steering lever 17 is tilted backward, the upper and lower cutting cylinders 14 are extended, raising the cutting device 4.

[0024] The brake 20 of the transmission case 18 is configured to be operated by operation of the power steering lever 17 of the control unit 6 as well as by operation of parking members (parking pedal, brake pedal, and raking pedal) 21 provided on the floor 10 of the control unit 6.

[0025] The stopping member 21 has a pedal portion 23 at the tip of a brake arm 22, and the base of the brake arm 22 is rotatably attached to the floor 10 side by an attachment shaft 24 (FIG. 4).

[0026] When the stopping member 21 is depressed, the brake 20 is actuated to apply a brake to the rotation transmitted to the left and right axles 26 while the vehicle is traveling, thereby stopping the vehicle.

[0027] Furthermore, when harvesting stalks growing on the ridges at the edge of a field during combine harvesting operations, depressing the parking member 21 (brake pedal) near the edge of the field disengages the left and right side clutches 19 of the transmission case 18, activates the left and right brakes 20, and operates as parking brakes, cutting off transmission to the traveling device 2. When the speed change operation lever 16 is operated in this state to the forward side, the driving force is transmitted to the reaping device 4, so that the stalks in contact with the reaping device 4 are reaped, lifted up, and transported to the threshing device 3; this series of operations is known as raking control.

[0028] Therefore, when harvesting stalks near the edge of the field, the front end of the combine is prevented from coming into contact with ridges or walls and being damaged, and crops near the edge of the field can be easily harvested, reducing the amount of stalks left unharvested and eliminating the need to manually harvest stalks.

[0029] On the other hand, in the above configuration, transmission to the mowing device 4 continues as long as the speed change lever 16 is operated to the forward side, so if the operator depresses the parking member 21 to the locked state, putting the parking brake into operation, and then forgets to return the speed change lever 16 to the neutral position when getting out of the vehicle, the mowing device 4 will remain in a continuously operating state.

[0030] At this time, even if the harvesting device 4 appears to have stopped operating due to a blockage of straw, the operator may forget to return the speed change lever 16 to the neutral position and move outside the machine to clear the blockage.However, if the harvesting device 4 is raised in this state and the operator attempts to clear the blockage from below, there is a risk of contact with the rotating drive parts such as the cutting blade or star wheel, and the safety of the blockage clearing operation cannot be ensured.

[0031] Therefore, in the present invention, in a combine harvester equipped with a harvesting device 4 that harvests and transports crops growing in a field, and a threshing device 3 that takes over and threshes the crops on the left rear side of the harvesting device 4, at least a stopping member (parking pedal, brake pedal, raking pedal) 21 is provided that switches between transmission and cutoff of the traveling power by a continuously variable transmission (HST) 15 that transmits driving force to the traveling device 2 and the harvesting device 4, and when the stopping member 21 is operated to either the transmission state or the cutoff state, the continuously variable transmission 15 is stopped, and when the stopping member 21 is between the transmission state and the cutoff state, the transmission path from the continuously variable transmission 15 to the traveling device 2 is cut off while power is transmitted to the harvesting device 4.

[0032] In this case, the state in which the parking member 21 is locked is the "disconnected state," and when the brake pedal is depressed to this state, the scraping control is restricted so that it becomes impossible to perform.

[0033] On the other hand, the "transmission state" means that the worker is stepping on the stopping member 21 but not stepping on it sufficiently, and does not apply sufficient force, keeping the stopping member 21 at a certain amount of depression.

[0034] In other words, when the stopping member 21 is not depressed, the rotation of the continuously variable transmission 15 is in a transmission state, and the traveling device 2 and the mowing device 4 continue to be in a drive transmission state (hereinafter referred to as the transmission state), and when the stopping member 21 is depressed to the maximum extent and locked, the drive rotation of the continuously variable transmission 15 is not transmitted to the traveling device 2 but is in a disconnected state (hereinafter referred to as the disconnected state), stopping the continuously variable transmission 15, and when the stopping member 21 is depressed between the transmission state and the disconnected state, the side clutch 19 of the transmission case 18, which is the transmission path from the continuously variable transmission 15 to the traveling device 2, is turned "off" to disconnect the transmission to the traveling device 2 while transmitting power to the mowing device 4.

[0035] In this case, the state in which the stopping member 21 is depressed between the transmission state and the disconnected state means that the stopping member 21, which is in the transmission state, is depressed with a certain amount of force and maintained in an unlocked state (for example, a state similar to half-clutch operation in a manual transmission vehicle), and the side clutch 19 in the transmission path to the traveling device 2 is disengaged, so that power is not transmitted to the traveling device 2, but is transmitted only to the reaping device 4, allowing the reaping device 4 to be operated without moving from the location.This means that when reaping of grain stalks is temporarily suspended at the edge of the field, etc., the grain stalks are reliably transported to the threshing device 3, preventing the grain stalks from falling off from the reaping device 4 before the next work start position is reached.

[0036] On the other hand, when the stopping member 21 is depressed to the maximum extent, the parking (locked) state is established, the continuously variable transmission 15 stops, and the reaping device 4 also stops (disconnected state). In this state, the stopping member 21 cannot be released unless the operator intentionally steps on it to cause it to go beyond the fulcrum.

[0037] As a result, when the worker steps firmly on the parking member 21 to park the machine in order to get off, the driving of the traveling device 2 as well as the reaping device 4 is stopped, allowing the worker to get off safely.

[0038] Therefore, when the worker is not operating the stopping member 21 or when the stopping member 21 is locked, the continuously variable transmission 15 stops, thereby restricting the work of stopping the vehicle in place, raking in and transporting the stalks, and moving them to the threshing device 3.

[0039] In this case, when the stopping member 21 is not being operated by the worker, for example, when the worker's foot is not in contact with the stopping member 21, the brake arm 22 rotates upward due to the force of the spring 57 described below, and this rotation causes the potentiometer 27 to detect the non-operating position (≒0 degrees).As a result, it is determined that the worker is not stepping on the stopping member 21 to operate it, and even if the speed change operation lever 16 is operated in the forward or backward direction from the neutral position, the operation result is not reflected in the continuously variable transmission 15, and therefore the continuously variable transmission 15 stops.

[0040] This prevents the operator from getting off the machine while the reaping device 4 is still running, ensuring safety when getting off.

[0041] When the operator operates the stopping member 21 to either the transmission state or the disconnection state, the continuously variable transmission 15 operates and the transmission to the traveling device 2 is disconnected, allowing the vehicle to stop in place, such as at the edge of a field, rake in the straw, and transport it to the threshing device 3 efficiently.

[0042] In other words, when the stopping member 21 is operated from the transmission state to the disconnected state, the continuously variable transmission 15 is stopped and the mowing device 4 is stopped. Therefore, even if the main transmission lever 16 is forgotten to be returned to the neutral position, the mowing device 4 will not operate, ensuring safety when dismounting.

[0043] When the worker operates (depresses) the stopping member 21, the continuously variable transmission 15 operates and the transmission to the traveling device 2 is cut off, allowing the vehicle to stop in place, such as at the edge of a field, rake in the straw, and transport it to the threshing device 3 efficiently.

[0044] A posture detection member (potentiometer) 27 is provided to detect whether the stopping member 21 is in a transmission state or between a transmission state and a cut-off state based on the posture (angle) of the stopping member 21, and a cut-off detection member (starting check switch, pedal lock claw, or lock lever next to the seat, etc.) 28 is provided to detect whether the stopping member 21 is in a cut-off state.

[0045] When the stopping member 21 is not operated, the attitude detecting member 27 detects a fixed angle (for example, 0 degrees), so that the continuously variable transmission 15 is prevented from being erroneously made operable.

[0046] When an operator operates the parking member 21, the operator changes the amount of operation by adjusting the speed or the amount of operation of the parking member 21 fluctuates slightly due to unconscious movements of the body, so that the posture detection member 27 detects the operation angle (amount of depression) of the parking member 21, making it easier to determine whether the operator is operating the parking member 21.

[0047] By operating the stopping member 21 to the blocking position and restricting the movement of the stopping member 21 itself with the blocking detection member 28 to determine that the stopping member 21 is in the blocking state, it is possible to prevent the blocking state from being released when the worker gets off the machine and the reaping device 4 from being driven, thereby ensuring the safety of the work.

[0048] Furthermore, if only the posture detection member 27 is used, the amount of operation of the stopping member 21 is large, and there is a risk that the depression position of 23 will be erroneously detected, which is a delicate point as to whether it will reach the locked position, causing the continuously variable transmission 15 to stop and preventing output to the harvesting device 4. However, by using the cut-off detection member 28 in combination, when the detection angle of the posture detection member 27 is equal to or greater than the specified value and the operation of the stopping member 21 is definitely locked, the transmission to the harvesting device 4 is cut off, so that the operator can safely get off the machine after the harvested straw has been transported to the threshing device 3.

[0049] In other words, by using the posture detection member 27 and the cut-off detection member 28 in combination, the transmission to the harvesting device 4 is reliably cut off to prevent the false stop of the continuously variable transmission 15 due to an erroneous detection of the operating amount of the stopping member 21, and the worker can safely get off the machine after the harvested straw has been transported to the threshing device 3.

[0050] The continuously variable transmission 15 has a mowing clutch 29 in the transmission path from the mechanical continuously variable transmission 15, whose output increases or decreases by operating the speed change lever 16, to the mowing device 4, and an electric motor 30 that switches the mowing clutch 29 on and off.When the stopping member 21 is operated to the disconnected position and locked, the electric motor 30 switches the mowing clutch 29 off, and when the stopping member 21 is released from the locked state, the operation of the electric motor (mowing clutch) 30 is restricted until a certain time has passed since the release operation.

[0051] The configuration in which the electric motor 30 switches the on / off of the mowing clutch 29 allows the transmission to the mowing device 4 to be cut off even when the mechanical continuously variable transmission 15 is in the output state by operating the speed change lever 16, so that the mowing device 4 can be stopped at the same time as the stopping member 21 stops the vehicle, improving safety when getting off the vehicle.

[0052] When the stopping member 21 is released from the locked state, the electric motor 30 does not operate until a certain time has passed after the release operation, and there is a grace period until the driving force is transmitted to the reaping device 4, so that the reaping device 4 is prevented from starting to move simultaneously with the unlocking operation.

[0053] In this case, the mechanical continuously variable transmission 15 refers to a device that operates by transmitting the operation of the transmission control lever 16 to the continuously variable transmission 15 via a wire, rod, or the like.

[0054] A gearshift operation detection member (lever potentiometer) 33 is provided to detect the operation of the gearshift operation lever 16 (Fig. 5), and when the gearshift operation detection member 33 detects that the gearshift operation lever 16 is in a position other than the neutral position, the electric motor 30 will not operate even if the lock state of the parking member 21 is released.

[0055] Unless the speed change operation lever 16 is operated to the neutral position and the output is "0" for both forward and reverse, the electric motor 30 does not operate and the mowing clutch 29 does not enter a transmission state, so that the mowing device 4 can be prevented from starting to move at a timing not intended by the operator.

[0056] This prevents startled workers from making erroneous operations, allowing for efficient harvesting of stalks by raking.

[0057] A speed change operation detection member (lever potentiometer) 33 is provided to detect the operation of the speed change operation lever 16, and the continuously variable transmission 15 is an electronic continuously variable transmission 15 in which the output increases or decreases as a solenoid 34 operates in accordance with the amount detected by the speed change operation detection member 33. When the stopping member 21 is operated to the disconnect position and locked, the output to the forward solenoid 34 is stopped and the output of the electronic continuously variable transmission 15 is set to "0." When the locked state of the stopping member 21 is released, the output to the forward solenoid 34 is restricted until a certain time (e.g., 0.5 seconds) has elapsed since the release operation (Figure 7).

[0058] In this case, the electronic continuously variable transmission 15 is a device that detects the operating position of the transmission operation lever 16 using a transmission operation detection member 33, outputs the detection result of the transmission operation detection member 33 to a solenoid 34, and the solenoid 34 transmits the operation of the main transmission lever (transmission operation lever) 16 to the continuously variable transmission 15 to operate it.

[0059] By configuring the output to the solenoid 34 to be turned on and off, when the stopping member 21 is operated, the transmission to the reaping device 4 can be cut off regardless of the operating position of the speed change operation lever 16, so that the stopping member 21 stops the vehicle and the reaping device 4 at the same time, improving safety when getting off the vehicle.

[0060] When the stopping member 21 is released from the locked state, no output is given to the solenoid 34 for a certain time after the release operation, and there is a grace period until the driving force is transmitted to the reaping device 4, so that the reaping device 4 is prevented from starting to move simultaneously with the unlocking operation.

[0061] When the neutral detection member 35 detects that the speed change operation lever 16 is not in the neutral position, no output is sent to the solenoid 34 even if the locked state of the stopping member 21 is released.

[0062] Unless the speed change operation lever 16 is once operated to the neutral position, no output is given to the solenoid 34 and no driving force is transmitted to the reaping device 4, so that the reaping device 4 can be prevented from starting to move at a timing not intended by the operator.

[0063] This prevents startled workers from making erroneous operations, allowing for efficient harvesting of stalks by raking.

[0064] If the reaping device 4 is in operation when the stopping member 21 is set to the disconnected state, the process of disconnecting the power transmission to the reaping device 4 is performed after a predetermined time (for example, 5 seconds) has elapsed.

[0065] Even if the stopping member 21 is cut off while the reaping device 4 is in operation, the transmission state is maintained for a predetermined time, so that the stalks can be harvested right up to the edge of the field, eliminating the need to cut the stalks manually and reducing the workload of the worker.

[0066] In addition, the reaping device 4 can be stopped after the stalks have been transported to the threshing device 3, which prevents the stalks from falling during transport and eliminates the need to pick up the fallen stalks.

[0067] The traveling device 2 is configured such that a continuously variable transmission 15 is provided in a transmission case 18 that transmits the rotation of the engine, and the driving rotation of the engine, which is continuously variable, is input from the continuously variable transmission 15 to an input shaft 18A of the transmission case 18, and transmitted to an axle 18B of the traveling device 2 to travel, and a reaping output shaft 36 that outputs the variable speed rotation of the continuously variable transmission 15 to the reaping device 4 is provided in the transmission path between the input shaft 18A of the transmission case 18 and the axle 26, and the continuously variable transmission 15 and the transmission case The system is configured to transmit the reaping rotation synchronized with the traveling speed to the reaping device 4 via the seat 18, and only when the parking member (parking brake pedal) 21 provided on the control unit 6 is depressed does the traveling of the machine stop, drive the reaping device 4 and the threshing device 3, and reaping and threshing the stalks in the field (grain stalks on the edge of the paddy field).The system is also configured to execute raking control to drive the reaping device 4 and the threshing device 3, and the raking control is not activated when the parking member 21 is locked.

[0068] In other words, when the stopping member 21 is locked, the operator can dismount from the machine, so the continuously variable transmission 15 stops and sets the output to "0" so that power is not transmitted to either the traveling device 2 or the reaping device 4.

[0069] Furthermore, when the stopping member 21 is rotated to an angle that is not locked and can be clearly considered to be depressed, the operator is riding on the control unit 6, so the continuously variable transmission 15 maintains its output and moves the stalks that are being transported from the harvesting device 4 to the threshing device 3.

[0070] This operation is performed when the harvester reaches the edge of the field and needs to move to the starting position for the next process, by transporting the stalks remaining on the transport path of the harvester 4 to the threshing device 3, thereby preventing the stalks from losing their transport position or falling into the field during movement.

[0071] Therefore, stable harvesting of culms becomes possible.

[0072] Also, since the sweep control can be executed only when the operator intentionally depresses the parking member 21 with a force that does not put the parking member 21 into either the locked state or the non-operated state, safety can be improved.

[0073] Therefore, the scraping control can be driven (executed) only when the parking member 21 is stepped on with a foot, thereby improving safety.

[0074] Furthermore, since the "stepping" of the stopping member 21 is a requirement for executing the raking control, it can be directly used with combine harvesters having conventional operating configurations.

[0075] In a configuration in which the harvesting device 4 is driven by a traveling HST 37, the raking control is activated (executed) only when the parking brake pedal (parking member 21) 38 is depressed, and the raking control is not activated when the parking brake pedal 38 is not locked, and the determination of whether the parking brake pedal 38 is in the locked position is made by using a position sensor 39 as an attitude detection member 27 that detects the pedal operating angle.

[0076] Therefore, the parking brake pedal 38 is locked, and the main speed change lever (speed change operation lever 16) 40 is tilted to the forward side to prevent the operator from getting off the machine while the reaping device 4 is being driven.

[0077] Therefore, the scraping control can be driven (executed) only when the parking brake pedal (parking member 21) 38 is being stepped on with the foot, thereby improving safety.

[0078] In a configuration in which the harvesting device 4 is driven by a traveling HST 37, the raking control is activated only when the parking brake pedal 38 is depressed, and the raking control is not activated when the parking brake pedal 38 is not locked, and the locked position of the parking brake pedal 38 is determined by a start-up prevention switch 41 provided on the parking brake pedal 38.

[0079] That is, the start-up inhibiting switch 41 is activated when the parking member 21 is depressed to the parking (locked) position (Fig. 4). Specifically, if the engine could be started when the parking member 21 is not in the parking position, the vehicle would start moving forward or backward depending on the operating position of the gear shift lever 16, etc. Therefore, if the parking member 21 is not operated to the parking position when the engine is started, the start signal will not be transmitted to the engine.

[0080] Therefore, the pull-in control can be driven (executed) only when the parking brake pedal 38 is depressed with the foot, thereby improving safety.

[0081] Here, "a configuration that can also be used as the start-up inhibit switch 41" means that the start-up inhibit switch 41 is a component that can acquire multiple numerical information from the potentiometer 27, etc., and can determine whether it has been operated to the parking position or within the range between the parking position and the non-operating position; in the former case, the engine start inhibit is released, and in the latter case, suction control is executed.

[0082] In addition, the start-up prevention switch 41 also serves as a detection switch that detects that the vehicle is in the parked state when the pedal section 23 is fully depressed.Since the vehicle is not generally traveling or mowing when in the parked state, it ignores operations to increase or decrease the output of the continuously variable transmission 15 or to engage the clutch.On the other hand, it is configured to accept key-on of the engine, etc. only when the vehicle is parked and the transmission operation lever 16 is in the neutral position, thereby preventing excessive load from being placed on the engine speed when the engine starts suddenly or when the HST output tries to rise to the high output range.

[0083] In a configuration in which the harvesting device 4 is driven by a traveling HST 37, the raking control is activated only when the parking brake pedal 38 is depressed, and is not activated when the parking brake pedal 38 is locked.The raking control is activated only when the parking brake pedal 38 is unlocked and depression is detected, and the locked position of the parking brake pedal 38 is determined on the side of the plate (floor 10) 43 to which the locking claw 42 provided on the parking brake pedal 38 is fixed.

[0084] When parking brake pedal 38 is locked, even if the pedal is depressed, there is almost no change in the angle detected by potentiometer 27, so it is not possible to detect whether the pedal is depressed. Furthermore, when parking brake pedal 38 is depressed to put the machine into parking mode, this is usually when the operator gets off the machine, so by stopping the raking control, the reaping device 4 does not operate when the operator gets off, allowing for safe dismounting.

[0085] On the other hand, when the parking brake pedal 38 is in an unlocked state, even if the operator continues to press the pedal with approximately the same force, the potentiometer 27 detects some degree of angle change from minute unconscious body movements, so it is possible to determine whether the operator is pressing the pedal while on board. Therefore, since the raking control can be performed while the operator is on board the control unit 6, i.e., while separated from the drive unit of the reaping device 4, work safety is ensured.

[0086] Therefore, the pull-in control can be driven (executed) only when the parking brake pedal 38 is depressed with the foot, thereby improving safety.

[0087] The configuration of the parking member 21 is arbitrary, but as one example, the pedal portion 23 is provided with a load changing device 51 that adjusts the depression load of the pedal portion 23, and the load changing device 51 has an adjustment spring 53 arranged below a boss 52 provided on the side of the pedal portion 23, a retaining shaft 54 ​​is inserted through the boss 52 and the adjustment spring 53, and the upper end of the retaining shaft 54 ​​is secured with a split pin 55 or the like to prevent it from coming loose, and the pedal portion 23 is held at a predetermined height position by the retaining shaft 54.

[0088] The parking member 21 is configured to be in a parking lock state when the pedal part 23 is depressed to a parking position, and to release the parking lock state when the pedal part 23 is depressed again, and when the pedal part 23 is depressed again, the parking member 21 is rotated upward by the elasticity of the spring 57 to cross the fulcrum.

[0089] Reference numeral 56 denotes a transmission member that transmits the operation of the stopping member 21 to the brake 20 in the transmission case 18.

[0090] In a configuration in which the harvesting device 4 is driven by a traveling HST 37, the raking control is activated only when the parking brake pedal 38 is depressed, and the raking control is not activated when the parking brake pedal 38 is locked.The locked position of the parking brake pedal 38 is determined by a separate lock lever 45 and a switch 46 on the lock lever 45 side (Figures 2 and 6).

[0091] As shown in Figure 6, the lock lever 45 can be operated in the left-right direction of the vehicle body, and the parking brake pedal 38 is placed in the parked state by hooking the lock pin 45a onto the lock claw 42 (Figure 2) provided at the lower end, and at this time, the arc surface at the lower end of the lock claw 42 presses the switch 46, thereby recognizing the parked state.

[0092] Therefore, by operating the lock lever 45 to one side, left or right, and bringing the lock pin 45a into contact with the recess above the lock claw 42, the lock claw 42 comes into contact with the switch 46, and the parked state of the parking brake pedal 38 is maintained unless the lock lever 45 is operated to the other side, left or right, to retract the lock pin 45a from the lock claw 42. Therefore, the parking state and released state of the parking brake pedal 38 will not be switched without intentional operation of the lock lever 45, so that the sweep control is prevented from being activated when the worker gets off the machine, improving work safety.

[0093] Furthermore, unless the lock lever 45 is operated, the parking state will not be switched over even if the parking brake pedal 38 is depressed. Therefore, even if the operator on the control unit 6 strongly depresses the parking brake pedal 38, the raking control will not be interrupted, and the operator can transfer the stalks from the harvesting device 4 to the threshing device 3 before turning, etc., and prevent the stalks from falling into the field when moving, such as turning.

[0094] Therefore, the pull-in control can be driven (executed) only when the parking brake pedal 38 is depressed with the foot, thereby improving safety.

[0095] In any of the above embodiments, in a vehicle in which the traveling HST 37 uses a mechanical continuously variable transmission 15, the electric motor 30 for switching the mowing clutch 29 on and off is operated to the off side, thereby stopping the drive of the mowing device 4.

[0096] Therefore, in a machine equipped with a traveling HST 37, which is a mechanical continuously variable transmission 15, the transmission from the engine to the harvesting device 4 is a separate system, and even if the output of the traveling HST 37 is set to "0", the harvesting device 4 will continue to operate as long as the engine is running.

[0097] Therefore, when the switch 46 detects that the parking brake pedal 38 has been operated to the parked position, the electric motor 30 is activated to turn off the mowing clutch 29, so that when the worker moves outside the vehicle, the engine's driving force is not transmitted to the mowing device 4, preventing it from operating, thereby ensuring safety during movement.

[0098] Therefore, the pull-in control can be driven (executed) only when the parking brake pedal 38 is depressed with the foot, thereby improving safety.

[0099] In any of the above embodiments, in a machine in which the traveling HST 37 uses a mechanical continuously variable transmission 15, the electric motor 30 of the mowing clutch 29 is operated to the off side to stop the drive of the mowing device 4, and when the parking brake pedal 38 is released from the locked position, the electric motor 30 of the mowing clutch 29 is operated to the on side again.

[0100] Therefore, by operating the parking brake pedal 38, the mowing clutch 29 to the mowing device 4 can be easily switched on and off, and there is no need for the operator to stop the engine when moving outside the machine, so there is no time required to restart the engine, and work time is reduced.

[0101] In any of the above embodiments, in a machine in which the traveling HST 37 uses a mechanical continuously variable transmission 15, the electric motor 30 of the mowing clutch 29 is operated to the off side to stop the drive of the mowing device 4, and after mowing has stopped, when the parking brake pedal 38 is released from the locked position, the mowing device 4 is driven again after a specified time (e.g., 0.5 seconds) has elapsed.

[0102] Therefore, the electric motor 30 does not operate at the same time as the parking brake pedal 38 is released, but rather operates after a certain period of time has passed and the mowing clutch 29 is turned on, so that the mowing device 4 operates after the alarm device described below is activated.This prevents the operator from panicking and operating the mowing device 4 incorrectly in response to the sudden operation of the mowing device 4, and prevents a decrease in work efficiency.

[0103] In any of the above embodiments, in a machine in which the traveling HST 37 uses a mechanical continuously variable transmission 15, the electric motor 30 of the mowing clutch 29 is operated to the off side, stopping the drive of the mowing device 4, and after mowing has stopped, when the parking brake pedal 38 is released from the locked position, the mowing device 4 is driven again after a specified time (e.g., 0.5 seconds) has passed, and after mowing has stopped, when the parking brake pedal 38 is released from the locked position, the mowing device 4 is driven again after a specified time (e.g., 0.5 seconds) has passed, and when mowing is started again, a buzzer 47 is sounded to notify the driver.

[0104] Therefore, the buzzer 47 sounds to notify the operator that the mowing machine is to be driven again, thereby further improving safety.

[0105] In any of the above embodiments, in a machine in which the traveling HST 37 uses a mechanical continuously variable transmission 15, the transmission motor 30 of the mowing clutch 29 is operated to the disengagement side, and the driving of the mowing device 4 is stopped.

[0106] In this case, when the stopping member 21 is operated to the disconnected position and locked, the electric motor 30 switches the mowing clutch 29 to the disconnected state, and when the locking state of the stopping member 21 is released, operation of the electric motor (mowing clutch) 30 is restricted until a certain time has elapsed since the release operation.

[0107] Therefore, unless the operator returns the main speed change lever 40 to the neutral position, the electric motor 30 will not engage the mowing clutch 29 and mowing work cannot be resumed. However, when the operator intentionally operates the main speed change lever 40, the restriction on the electric motor 30 is released, so the operation of the mowing device 4 also becomes as expected, preventing the induction of erroneous operation due to unexpected operation.

[0108] In any of the above embodiments, in a machine using the electronic continuously variable transmission 15, the output to the forward solenoid 34 is stopped, and the driving of the reaping device 4 is stopped.

[0109] In this case, when the parking brake pedal 38 is operated to the parked state and the switch 46 is turned on, the output to the forward solenoid 34 is stopped.

[0110] Therefore, when the parking brake pedal 38 is placed in the parking position, the transmission to the traveling device 2 and the reaping device 4 is quickly cut off, so that the machine body does not move when the raking control ends or when the operator gets off the machine, and the reaping device 4 does not move, thereby ensuring the safety of the operator.

[0111] In any of the above embodiments, in a machine that uses an electronic continuously variable transmission 15, the output to the forward solenoid 34 is stopped to stop the driving of the mowing device 4, and when the parking brake pedal 38 is released from the locked position, the output is again sent to the forward solenoid 34 to drive the mowing device 4.

[0112] Therefore, after performing the raking control, the machine can be quickly shifted to turning travel, etc., thereby improving work efficiency.

[0113] In any of the above embodiments, in a machine that uses an electronic continuously variable transmission 15, the output to the forward solenoid 34 is stopped, and the driving of the mowing device 4 is stopped, and when the parking brake pedal 38 is released from the locked position, after a specified time (e.g., 0.5 seconds) has elapsed, output is again sent to the forward solenoid 34, and the mowing device 4 is driven.

[0114] Therefore, after the parking brake pedal 38 is released from the parking state, driving force is not transmitted to the traveling device 2 or the reaping device 4 until a certain time has passed, which prevents the operator from being surprised by sudden operation and causing erroneous operation.

[0115] In any of the above embodiments, in a machine that uses an electronic continuously variable transmission 15, the output to the forward solenoid 34 is stopped, and the driving of the mowing device 4 is stopped. When the parking brake pedal 38 is released from the locked position, after a specified time (e.g., 0.5 seconds) has elapsed, output is again sent to the forward solenoid 34, driving the mowing device 4, and when mowing is started again, a buzzer 47 is sounded to notify the driver.

[0116] Therefore, the buzzer 47 sounds to notify the operator that the mowing machine is to be driven again, thereby further improving safety.

[0117] In any of the above embodiments, in a machine that uses an electronic continuously variable transmission 15, the output to the forward solenoid 34 is stopped to stop the drive of the mowing device 4, and when the parking brake pedal 38 is released from the locked position, no output is sent to the forward solenoid 34 until the main speed change lever 40 returns to the neutral position.

[0118] Therefore, no output is sent to the forward solenoid 34 unless the operator returns the main speed change lever 40 to the neutral position, and therefore, when the operator intentionally operates the main speed change lever 40, the restriction on the forward solenoid 34 is released, so that the operation of the reaping device 4 is also anticipated, preventing erroneous operation due to unexpected operation.

[0119] In any of the above embodiments, the mowing device 4 is configured to be driven for a specified time even when the parking brake pedal 38 is locked.

[0120] Therefore, even if the parking brake pedal 38 is switched to the parking state, the transmission of power to the reaping device 4 continues for a specified time, so that the stalks being transported to the threshing device 3 by the raking control do not remain in an intermediate position and do not fall into the field during turning, etc. This eliminates the need to pick up the fallen stalks.

[0121] Therefore, the reaping device 4 is driven after a predetermined time has elapsed since the parking brake pedal 38 was locked. For example, the predetermined time is set to about 5 seconds.

[0122] In any of the above embodiments, the mowing device 4 is configured to be driven for a specified time even when the parking brake pedal 38 is locked, and after mowing stops, the mowing device 4 is configured to be driven again when the parking brake pedal 38 is released from the locked position.

[0123] In any of the above embodiments, the mowing device 4 is configured to be driven for a specified time even when the parking brake pedal 38 is locked, and after the specified time has elapsed, the mowing device 4 is stopped, and after mowing has stopped, if the parking brake pedal 38 is released from the locked position, the mowing device 4 is configured to be driven again after the specified time has elapsed.

[0124] Therefore, when the parking brake pedal 38 is operated to release the parking state, the operation of the mowing device 4 is restricted until a predetermined time has elapsed, thereby preventing the operator from making an incorrect operation, which would reduce work efficiency and accuracy, as the mowing device 4 operates simultaneously with the operation of the parking brake pedal 38.

[0125] In any of the above embodiments, the mowing device 4 is configured to be driven for a specified time even when the parking brake pedal 38 is locked, and is stopped after the specified time has elapsed.After mowing has stopped, if the parking brake pedal 38 is released from the locked position, the mowing device 4 is driven again after the specified time has elapsed, and when mowing is started again, a buzzer 47 is sounded to notify the user that the mowing device 4 is to be driven again.

[0126] In any of the above embodiments, even when the parking brake pedal 38 is locked, the mowing device 4 is configured to be driven for a specified time, and then stopped, and after mowing has stopped, the device does not transition to raking control until the parking brake pedal 38 is depressed again.

[0127] Therefore, when it is necessary to perform raking control again after the parking brake pedal 38 is set to the parking state, the operator can perform raking control by releasing the parking state and then stepping on the parking brake pedal 38, thereby preventing the stalks from falling during movement.

[0128] In any of the above embodiments, even when the parking brake pedal 38 is locked, the mowing device 4 is driven for a specified time and stopped after a predetermined time, and after mowing has stopped, no output is sent to the forward solenoid 34 until the main shift lever 40 returns to the neutral position.

[0129] Therefore, no output is sent to the forward solenoid 34 unless the operator returns the main speed change lever 40 to the neutral position, and therefore, when the operator intentionally operates the main speed change lever 40, the restriction on the forward solenoid 34 is released, so that the operation of the reaping device 4 is also anticipated, preventing erroneous operation due to unexpected operation.

[0130] In any of the above embodiments, when the mowing maintenance mode is entered by touching the screen of the monitor 50 provided on the control unit 6, the condition for locking the parking brake pedal 38 is invalidated.

[0131] Therefore, even if the parking brake pedal 38 is in the parked state during maintenance settings, the operator can operate the parking brake pedal 38 to perform the raking control behavior, and by running each part of the reaping device 4 idly, it becomes easier to identify the parts that require maintenance.

[0132] In the case of the electronic continuously variable transmission 15 in any of the above embodiments, when the mowing maintenance mode is entered by touching the screen of the monitor 50 provided on the control unit 6, the locking condition of the parking brake pedal 38 is disabled, and during the mowing maintenance mode, the output to the forward solenoid 34 is reduced to a specified value.

[0133] Therefore, by limiting the output of the forward solenoid 34 during maintenance settings, even if power is transmitted to the traveling device, the machine will be prevented from moving at high speed, ensuring work safety.

[0134] Furthermore, the speed at which the reaping device 4 operates can be reduced by the raking control, making it easy to visually check areas that require maintenance.

[0135] In the case of the electronic continuously variable transmission 15 in any of the above embodiments, when the mowing maintenance mode is entered by touching the screen of the monitor 50 provided on the control unit 6, the locking condition of the parking brake pedal 38 is disabled, and when the mowing maintenance mode ends, the locking condition of the parking brake pedal 38 is enabled.

[0136] Therefore, by returning the settings to their original state after maintenance is completed, different behavior can be prevented when performing tasks such as sweep control, thereby preventing operations from becoming complicated. [Explanation of symbols]

[0137] 1...machine frame, 2...traveling device, 3...threshing device, 4...reaping device, 5...grain tank, 6...control unit, 10...floor, 15...continuously variable transmission, 16...speed change operation lever, 17...power steering lever, 18...transmission case, 18A...input shaft, 18B...axle, 19...side clutch, 20...brake, 21...stopping member, 23...pedal section, 26...axle, 27...attitude detection member, 28...interruption detection member, 29...reaping clutch, 30...electric Motor, 31...control unit, 33...speed change operation detection member, 34...solenoid, 35...neutral detection member, 36...cutting output shaft, 37...travel HST, 38...parking brake pedal, 40...main speed change lever, 41...starting check switch, 42...locking claw, 43...plate, 45...lock lever, 46...switch, 47...buzzer, 50...monitor, 51...load change device, 52...boss, 53...adjustment spring, 54...retaining shaft, 55...cotter pin.

Claims

1. The combine harvester is provided with a reaping device (4) for reaping and transporting crops growing in a field, and a threshing device (3) for taking over the crops and threshing them on the left rear side of the reaping device (4), and is provided with a stopping member (21) for switching between transmission and interruption of travel power by a continuously variable transmission (15) for transmitting driving power to a traveling device (2) and the reaping device (4), a posture detection member (27) for detecting whether the stopping member (21) is in a transmission state or between a transmission state and a disconnection state from the posture of the stopping member (21); and a disconnection detection member (28) for detecting whether the stopping member (21) is in a disconnection state. A speed change operation detection member (33) is provided to detect the operation of a speed change operation lever (16), and the output of the continuously variable transmission (15) is increased or decreased by actuating a solenoid (34) in accordance with the amount detected by the speed change operation detection member (33). When the stopping member (21) is operated to the blocking position and locked, the output to the forward solenoid (34) is stopped and the output of the continuously variable transmission (15) is set to "0", and when the locked state of the stopping member (21) is released, the output to the forward solenoid (34) is restricted until a certain time has elapsed since the release operation.

2. A combine harvester as described in Claim 1, characterized in that when the neutral detection member (35) detects that the speed change operating lever (16) is not positioned in the neutral position, no output is sent to the forward side solenoid (34) even if the lock state of the stopping member (21) is released.

3. A combine harvester as described in claim 1 or claim 2, characterized in that when the stopping member (21) is set to the disconnected state, if the cutting device (4) is in operation, a process of disconnecting power transmission to the cutting device (4) is performed after a predetermined time has elapsed.

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