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 cuts and lifts up culms growing in a field using a harvesting device, sends the culms along a transport path to a thresher, separates the grains in the thresher, and then stores the grains in a storage tank.

[0003] When harvesting stalks growing near 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 the power transmission to the traveling device. When the gear shift lever is operated to the forward side in this state, the driving force is transmitted to the reaping device, so the stalks in contact with the reaping device are reaped, lifted up, and transported to the threshing device. This series of reaping operations at the edge of the field is called raking control, which 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 leftover stalks 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, transmission of power to the mowing device continues as long as the gear shift lever is operated to the forward direction, so if the operator forgets to return the gear shift lever to the neutral position when getting out of the vehicle, the mowing device will remain operating.

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

[0008] To prevent the above problems from occurring, it is desirable to restrict the scraping control, which moves the stalks harvested by the harvesting device on the spot to the threshing device, 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 creates the problem of a complicated configuration.

[0009] The present application is directed to improving 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 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. A stopping member 21 is provided for switching between transmission and cut-off of the traveling power by a continuously variable transmission 15 that transmits driving force to the traveling device 2 and the harvesting device 4. When the stopping member 21 is operated to a transmission state or a cut-off state, the continuously variable transmission 15 is stopped, and when the stopping member 21 is between the transmission state and the cut-off state, the transmission path from the continuously variable transmission 15 to the traveling device 2 is cut off while transmitting power to the harvesting device 4. From the attitude of the stopping member 21, it is detected whether the state is in the transmission state or between the transmission state and the cut-off state. The combine harvester is characterized in that a posture detection member 27 is provided for detecting whether the stopping member 21 is in a disengaged state, and a disengagement detection member 28 is provided for detecting whether the stopping member 21 is in a disengaged state, and the continuously variable transmission 15 is provided with a mowing clutch 29 in a transmission path from the mechanical continuously variable transmission 15, whose output is increased or decreased by operation of the speed change operation lever 16, to the mowing device 4, and an electric motor 30 is disposed for switching the mowing clutch 29 on and off, and when the stopping member 21 is operated to the disengaged position and locked, the electric motor 30 switches the mowing clutch 29 to a disengaged state, and when the locked state of the stopping member 21 is released, the operation of the electric motor 30 is restricted until a certain time has elapsed since the release operation.

[0011] In the invention of claim 2, a speed change operation detection member 33 is provided which detects the operation of the speed change lever 16, and when the speed change operation detection member 33 detects that the speed change lever 16 is in a position other than the neutral position, the electric motor 30 does not operate even if the lock state of the stopping member 21 is released.

[0012] In the invention of claim 3, a speed change operation detection member 33 is provided which detects the operation of the speed change operation lever 16, and the continuously variable transmission 15 is an electronic continuously variable transmission 15 whose output increases or decreases as a solenoid 34 operates in accordance with the amount detected by the speed change operation detection member 33, and 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 electronic 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, characterized in that the combine harvester described in claim 1.

[0013] In the invention of claim 4, the combine harvester is characterized in that when the neutral detection member 35 detects that the speed change 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.

[0014] The invention of claim 5 is a combine harvester described in any one of claims 1 to 4, characterized in that when the stopping member 21 is set to the disconnected state, if the harvesting device 4 is in operation, a process of disconnecting the transmission to the harvesting device 4 is performed after a predetermined time has elapsed. Effect 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 worker from stopping in place and raking in and transporting the straw 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 the machine.

[0016] When the operator operates the stopping member 21 between the transmission state and the cut-off state, 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 efficiently transport it to the threshing device 3. [Brief description of the drawings]

[0017] [Figure 1] Side view of a combine harvester. [Diagram 2] FIG. [Diagram 3] Schematic diagram of the transmission case. [Figure 4] FIG. 4 is a side view of the parking member (parking brake pedal). [Diagram 5] Block diagram. [Figure 6] FIG. [Figure 7] FIG. 4 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 a combine harvester body frame, 2 is a traveling device below the body frame 1, 3 is a threshing device provided on one side above the body frame 1, 4 is a harvesting device, 5 is a grain tank provided to the side of the threshing device 4, and 6 is a 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, and 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 to travel the machine, and the speed-changed rotation of the continuously variable transmission 15 transmitted to the traveling device 2 is transmitted to the mowing device 4, and the working speed of the mowing device 4 is synchronized with the traveling speed to perform mowing 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 steering unit 6.

[0022] Furthermore, the normal direction of travel of the traveling device 2 is controlled by a power steering lever 17 provided on the operation 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 to change 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 operated to turn the vehicle.

[0023] In addition, 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 not only by operation of the power steering lever 17 of the control unit 6, but also 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 parking member 21 has a pedal portion 23 at the tip of a brake arm 22, and the base portion of the brake arm 22 is rotatably attached to the floor 10 side by a mounting 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] In addition, when harvesting stalks growing on the ridges at the edge of a field during combine harvester reaping work, 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 and activates the left and right brakes 20 to operate as parking brakes and cut off transmission to the traveling device 2. When the gear shift lever 16 is operated to the forward side in this state, the structure is such that 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] As a result, 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 causing damage, and crops near the edge of the field can be easily harvested, reducing the amount of leftover stalks 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 direction, so if the parking member 21 is depressed to the locked state, putting the parking brake into operation, and the operator 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 an 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 gear shift lever 16 to the neutral position and move outside the machine to clear the blockage. In this state, if the harvesting device 4 is raised and the worker 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, making it unsafe to perform the work of clearing the blockage.

[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 cut-off 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 cut-off state, the continuously variable transmission 15 is stopped, and when the stopping member 21 is between the transmission state and the cut-off 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 cannot be performed.

[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, that is, the worker is not applying sufficient force and the stopping member 21 is held at a constant 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 in a drive transmission state (hereinafter referred to as the transmission state), and when the stopping member 21 is fully depressed 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. When the stopping member 21 is depressed between the transmission state and the disconnected state, the second 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, and power is transmitted only to the harvesting device 4, and the harvesting device 4 can be operated without moving from the spot.As a result, when harvesting of stalks is temporarily suspended at the edge of the field, etc., the stalks are reliably transported to the threshing device 3, and the stalks are prevented from falling off from the harvesting device 4 before the next work start position is reached.

[0036] On the other hand, when the parking member 21 is depressed to the maximum extent, the parking (locked) state is entered, the continuously variable transmission 15 stops, and the mowing device 4 also stops (disconnected state). In this state, the parking member 21 cannot be released unless the operator intentionally depresses the parking member 21 to cause it to cross the fulcrum.

[0037] As a result, when an operator 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 operator 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 operation of stopping the vehicle in place, raking in and transporting the straw and moving it to the threshing device 3.

[0039] In this case, when the stopping member 21 is not being operated by the operator, for example, when the operator'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 operator 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 / rearward 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 makes it possible to prevent a situation in which an operator gets off the machine while the reaping device 4 is still in operation, thereby ensuring safety when getting off the machine.

[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, thereby enabling the vehicle to stop in place, such as at the edge of a field, rake in the straw, and efficiently transport it to the threshing device 3.

[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 to stop the mowing device 4. 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 power transmission to the running 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 efficiently transport it to the threshing device 3.

[0044] A posture detection member (potentiometer) 27 is provided which detects 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 (a starting check switch, a pedal lock claw, or a lock lever next to the seat, etc.) 28 is provided which detects whether the stopping member 21 is in a cut-off state.

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

[0046] When an operator operates the parking member 21, the amount of operation may be changed by adjusting the speed, or the amount of operation of the parking member 21 may fluctuate slightly due to unconscious body movements, 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 determining that the stopping member 21 is in the blocking state by restricting the movement of the stopping member 21 itself with the blocking detection member 28, 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 attitude detection member 27 is used, the amount of operation of the stopping member 21 is large, and there is a risk that the delicate depression position of 23 will be erroneously detected, which is a matter of whether it will reach the locked position, causing the continuously variable transmission 15 to stop and no output to the harvesting device 4. However, by using the cut-off detection member 28 in combination, when the detection angle of the attitude 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 of power to the harvesting device 4 is reliably cut off to prevent erroneous stopping of the continuously variable transmission 15 due to 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 is increased or decreased 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 is disposed in the transmission path. When the stopping member 21 is operated to the disconnected position and locked, the electric motor 30 switches the mowing clutch 29 to a disconnected state, 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 elapsed since the release operation.

[0051] By using the electric motor 30 to switch the mowing clutch 29 on and off, the transmission to the mowing device 4 can be cut off even when the mechanical continuously variable transmission 15 is in the output state by operating the speed change lever 16. Therefore, when the stopping member 21 is used to stop the vehicle's travel, the mowing device 4 is also stopped at the same time, improving safety when dismounting.

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

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

[0054] A gear shift operation detection member (lever potentiometer) 33 is provided which detects the operation of the gear shift lever 16 (FIG. 5). When the gear shift operation detection member 33 detects that the gear shift lever 16 is in a position other than the neutral position, the electric motor 30 will not operate even if the locked state of the parking member 21 is released.

[0055] Unless the speed change lever 16 is operated to the neutral position and the output is "0" for both forward and reverse, the electric motor 30 will not operate and the mowing clutch 29 will not be in a transmission state, preventing the mowing device 4 from starting to move at a time unintended by the operator.

[0056] This prevents a startled worker from making an erroneous operation, and allows for efficient harvesting of culms by raking.

[0057] A gear shift operation detection member (lever potentiometer) 33 is provided which detects the operation of the gear shift 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 gear shift operation detection member 33. When the stopping member 21 is operated to the disconnected 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 parking member 21 is released from the locked state, 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 refers to a device that detects the operating position of the transmission operation lever 16 by the transmission operation detection member 33, outputs the detection result of the transmission operation detection member 33 to the 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, the transmission to the mowing device 4 can be cut off when the stopping member 21 is operated regardless of the operating position of the speed change lever 16. Therefore, when the stopping member 21 is used to stop the vehicle's travel, the mowing device 4 is also stopped at the same time, improving safety when dismounting.

[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 mowing device 4, so that the mowing device 4 is prevented from starting to move at the same time as the unlocking operation.

[0061] When the neutral detection member 35 detects that the gear shift 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 lever 16 is once operated to the neutral position, no output is sent to the solenoid 34 and no driving force is transmitted to the mowing device 4, thereby preventing the mowing device 4 from starting to move at a time unintended by the operator.

[0063] This prevents a startled worker from making an erroneous operation, and allows for efficient harvesting of culms by raking.

[0064] If the mowing device 4 is in operation when the stopping member 21 is switched to the disconnected state, the process of disconnecting the power transmission to the mowing 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 harvesting device 4 is in operation, the transmission state is maintained for a specified time, so that the stalks can be harvested right up to the edge of the field, eliminating the need to harvest the stalks manually and reducing the workload of the worker.

[0066] In addition, since the harvesting device 4 can be stopped after the stalks have been transported to the threshing device 3, the stalks can be prevented from falling during transport, eliminating 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 for traveling. A mowing output shaft 36 that outputs the variable speed rotation of the continuously variable transmission 15 to the mowing device 4 is provided in a 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 harvesting operation rotation synchronized with the traveling speed to the harvesting device 4 via the brake pedal 18, and only when the parking member (parking brake pedal) 21 provided on the control unit 6 is depressed is the vehicle body stopped from traveling and the harvesting device 4 and the thresher 3 are driven to harvest and thresh the stalks in the field (stalks on the edge of the paddy fields), and to execute raking control to drive the harvesting device 4 and the thresher 3, and the raking control is not operated when the parking member 21 is locked.

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

[0069] In addition, when the stopping member 21 is rotated to an angle that is not locked and can be clearly regarded as being stepped on, 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 harvesting device 4 reaches the edge of the field and needs to move to the starting position for the next process, in order to transport the stalks remaining on the transport path of the harvesting device 4 to the threshing device 3, thereby preventing the stalks from losing their transport position or falling into the field during movement.

[0071] This enables stable harvesting of culms.

[0072] Also, since the sweeping control can be executed only when the operator intentionally depresses the parking member 21 with a force that does not result in 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 the foot, thereby improving safety.

[0074] In addition, since the "stepping" of the stopping member 21 is the execution requirement for 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. Whether or not the parking brake pedal 38 is in the locked position is determined by a configuration in which an attitude detection member 27 that detects the pedal operating angle is configured by a position sensor 39.

[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 direction to prevent the operator from getting off the machine while the mowing 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 depressed 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. The locked position of the parking brake pedal 38 is determined by using a start-up inhibition switch 41 provided on the parking brake pedal 38.

[0079] In other words, the start-inhibiting switch 41 is operated when the parking member 21 is depressed into the parking (locked) position (Fig. 4). Specifically, if the engine could be turned on 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., so the switch is designed so that if the parking member 21 is not operated into 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 inhibition switch 41" means that the start-up inhibition switch 41 is a component that can acquire multiple numerical information from the potentiometer 27, etc., and can determine whether the switch 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 inhibition of engine start is released, and in the latter case, suction control is executed.

[0082] The start-up check 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 driven or mowing in the parked state, the switch ignores operations to increase or decrease the output of the continuously variable transmission 15 and to engage the clutch. On the other hand, the switch is configured to only accept key-on of the engine, etc., when the vehicle is parked and the transmission operation lever 16 is in the neutral position. This prevents excessive load from being placed on the engine speed when the engine is started, such as 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 a locking claw 42 provided on the parking brake pedal 38 is fixed.

[0084] When the parking brake pedal 38 is locked, the angle detected by the potentiometer 27 hardly changes even if the pedal is depressed, so it is not possible to detect whether the pedal is depressed or not. Furthermore, since the parking brake pedal 38 is depressed to put the machine into a parked state, which is roughly when the operator gets off the machine, the raking control stops, so that the reaping device 4 does not operate when the operator gets off, allowing the operator to get off safely.

[0085] On the other hand, when the parking brake pedal 38 is in an unlocked state, even if the operator continues to depress the pedal with approximately the same force, the potentiometer 27 detects a certain degree of angle change from minute unconscious body movements, so it is possible to determine whether the operator is depressing 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, the safety of the operation 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 on the lower side of 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 prevented from coming loose with a split pin 55 or the like, 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 by depressing the pedal part 23 again, and when the pedal part 23 is depressed again, the parking member 21 rotates 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 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 side of the lock lever 45 (Figures 2 and 6).

[0091] As shown in FIG. 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 (FIG. 2) provided at the lower end, and at this time, the arcuate 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 in one direction to the 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 in the other direction to the 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 cannot be switched without intentional operation of the lock lever 45, so that the shoveling control is prevented from being activated when the operator gets off the machine, improving work safety.

[0093] In addition, 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 presses the parking brake pedal 38 hard, the raking control will not be interrupted, so the operator can transfer the stalks from the harvesting device 4 to the threshing device 3 before making a turn, etc., and prevent the stalks from falling into the field during a turn or other movement.

[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 machine 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, and the drive of the mowing device 4 is stopped.

[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 state, the electric motor 30 is operated to switch the mowing clutch 29 to the off state, so that when the operator moves outside the vehicle, the engine's driving force is not transmitted to the mowing device 4 to operate it, 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 again operated to the on side.

[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 to stop the engine when the worker moves outside the machine, so there is no time required to restart the engine, and working 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 and 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 S) has elapsed.

[0102] Therefore, the electric motor 30 does not operate at the same time as the parking brake pedal 38 is released. Instead, the electric motor 30 operates after a certain period of time has passed, turning on the mowing clutch 29, and the mowing device 4 operates after the alarm device described below is activated. This prevents the operator from panicking and erroneously operating the mowing device 4 in response to the sudden operation of the mowing device 4, preventing 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 to stop the driving 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 S) has elapsed, 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 S) has elapsed, and when mowing is started again, a buzzer 47 is sounded to notify the driver.

[0104] Therefore, the buzzer 47 sounds to notify the user when the mowing operation is to be performed again, thereby further improving safety.

[0105] In any of the above-described embodiments, in a machine in which the traveling HST 37 uses the mechanical continuously variable transmission 15, the transmission motor 30 of the mowing clutch 29 is operated to the off side, and the drive 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 locked 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 electric motor 30 is released from restriction, so that the operation of the mowing device 4 is also anticipated, preventing the induction of erroneous operation due to unexpected operation.

[0108] In any of the above-described embodiments, in a machine using the electronic continuously variable transmission 15, the output to the forward solenoid 34 is stopped, and the drive 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 parked state, the transmission of power to the traveling device 2 and the mowing device 4 is quickly cut off, so that the machine body will not move when the shoveling control ends or when the operator gets off the machine, and the mowing device 4 will 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 to stop the driving of the mowing device 4, and when the parking brake pedal 38 is released from the locked position, after a specified time (e.g., 0.5 S) has elapsed, output is again sent to the forward solenoid 34 to drive the mowing device 4.

[0114] Therefore, after the parking brake pedal 38 is released from the parked state, driving force is not transmitted to the traveling device 2 or the mowing device 4 until a certain amount of time has elapsed, 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 to stop the driving of the mowing device 4, and when the parking brake pedal 38 is released from the locked position, after a specified time (e.g., 0.5 S) has elapsed, output is again sent to the forward solenoid 34 to drive 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 user when the mowing operation is to be performed 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 transmission lever 40 returns to the neutral position.

[0118] Therefore, since no output is sent to the forward solenoid 34 unless the operator returns the main shift lever 40 to the neutral position, the restriction on the forward solenoid 34 is released when the operator intentionally operates the main shift lever 40, so that the operation of the harvesting device 4 is anticipated, and the induction of erroneous operation due to unexpected operation is prevented.

[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 parked state, the transmission to the harvesting device 4 continues for a specified time, so that the stalks transported to the threshing device 3 by the raking control are prevented from remaining in an intermediate position and falling into the field during turning, etc. This makes it unnecessary to pick up the fallen stalks.

[0121] Therefore, the mowing 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 five 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 has stopped, 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 parked state, operation of the mowing device 4 is restricted until a specified time has elapsed, thereby preventing the operator from making an erroneous operation that would reduce work efficiency and accuracy by operating the mowing device 4 simultaneously with the operation of the parking brake pedal 38.

[0125] In any of the above embodiments, even if the parking brake pedal 38 is locked, the mowing device 4 is configured to be driven for a specified time, and is stopped after the predetermined 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 predetermined 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. After mowing has stopped, the raking control is not started again 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 parked state, the operator can perform raking control by depressing the parking brake pedal 38 after releasing the parked state, thereby preventing the stalks from falling during movement.

[0128] In any of the above embodiments, even if 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 given to the forward solenoid 34 until the main shift lever 40 returns to the neutral position.

[0129] Therefore, since no output is sent to the forward solenoid 34 unless the operator returns the main shift lever 40 to the neutral position, the restriction on the forward solenoid 34 is released when the operator intentionally operates the main shift lever 40, so that the operation of the harvesting device 4 is anticipated, and the induction of erroneous operation due to unexpected operation is prevented.

[0130] In any of the above-described 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 setting, the operator can depress the parking brake pedal 38 to perform the raking control behavior, and by running each part of the harvesting device 4 idly, it becomes easy to identify the parts that require maintenance.

[0132] In any of the above embodiments, in the case of the electronic continuously variable transmission 15, when the cutting maintenance mode is entered by touching the screen of the monitor 50 provided on the control unit 6, the lock condition of the parking brake pedal 38 is invalidated, and during the cutting 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 setting, even if power is transmitted to the traveling device, the machine is prevented from moving at high speed, thereby ensuring the safety of the work.

[0134] In addition, the speed at which the reaping device 4 operates is reduced through raking control, making it easy to visually check areas requiring maintenance.

[0135] In any of the above embodiments, in the case of the electronic continuously variable transmission 15, when the mowing maintenance mode is entered by touching the screen of the monitor 50 provided on the control unit 6, the lock condition of the parking brake pedal 38 is disabled, and when the mowing maintenance mode is ended, the lock 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 gear, 3...threshing gear, 4...reaping gear, 5...grain tank, 6...operating section, 10...floor, 15...continuously variable transmission, 16...gear shift 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...position 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...traveling 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...adjusting spring, 54...retaining shaft, 55...cotter pin.

Claims

1. In a combine harvester equipped with a harvesting device (4) for harvesting and transporting crops growing in a field, and a threshing device (3) for taking over and threshing the crops at the rear left side of the harvesting device (4), a stopping member (21) is provided for switching between transmission and interruption of the traveling power transmission by a continuously variable transmission device (15) for transmitting driving force to a traveling device (2) and the harvesting device (4), and when the stopping member (21) is operated to a transmission state or an interruption state, the continuously variable transmission device (15) is stopped, and when the stopping member (21) is in the transmission state or the interruption state, the stopping member (21) transmits power to the harvesting device (4) while interrupting the transmission path from the continuously variable transmission device (15) to the traveling device (2), and the stopping member (21) detects whether the state is in the transmission state or between the transmission state and the interruption state from the attitude of the stopping member (21). The combine harvester is characterized in that a power detection member (27) is provided, and a disconnection detection member (28) is provided for detecting whether the stopping member (21) is in a disconnected state, and the continuously variable transmission (15) is provided with a mowing clutch (29) in a transmission path from the mechanical continuously variable transmission (15) whose output is increased or decreased by the operation of a speed change operation lever (16) to the mowing device (4), and an electric motor (30) is disposed for switching the mowing clutch (29) on and off, and when the stopping member (21) is operated to a disconnected position to lock it, the electric motor (30) switches the mowing clutch (29) to a disconnected state, and when the locked state of the stopping member (21) is released, the operation of the electric motor (30) is restricted until a certain time has elapsed since the release operation.

2. The combine harvester according to claim 1, further comprising a speed change operation detection member (33) for detecting the operation of the speed change lever (16), and when the speed change operation detection member (33) detects that the speed change lever (16) is in a position other than a neutral position, the electric motor (30) will not operate even if the lock state of the stopping member (21) is released.

3. The combine harvester according to claim 1, further comprising: a speed change operation detection member (33) that detects the operation of a speed change operation lever (16); the continuously variable transmission (15) is an electronic continuously variable transmission (15) whose output is increased or decreased by activation of a solenoid (34) in accordance with the amount of detection by the speed change operation detection member (33); when the stopping member (21) is operated to a blocking 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"; 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.

4. The combine harvester according to claim 3, characterized in that when the neutral detection member (35) detects that the speed change lever (16) is not in the neutral position, no output is given to the solenoid (34) even if the lock state of the stopping member (21) is released.

5. A combine harvester as described in any one of claims 1 to 4, characterized in that when the stopping member (21) is in the disconnected state, if the harvesting device (4) is in operation, a process of disconnecting the transmission to the harvesting device (4) is performed after a predetermined time has elapsed.

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