Harvester

Abstract

To provide a harvester which enables an output operation of a stepless speed variator while maintaining cabin comfort and can easily operate the stepless speed variator to the output of traveling at a slow speed.SOLUTION: A harvester includes: a reaping device 3 on a machine body that is moved by a travel device 2; a threshing device 4 for separating grains from grain culms; a stepless speed variator 20 for transmitting driving force to each device; and a cabin 5b which covers the surroundings and upper part of a steering part 5. The stepless speed variator 20 includes: an input variable actuator 110b to change and stop the axis rotation on the input side; and an output variable actuator 110a to change and stop the axis rotation on the output side. The steering part 5 includes a variable operation member 16 to adjust the actuation amount of the input variable actuator 110b and output variable actuator 110a according to the detection of an angle sensor 16S. The variable operation member 16 is installed in such a manner that the surroundings and lower side of the lower part are sealed.SELECTED DRAWING: Figure 24

Description

[Technical field]

[0001] The present invention relates to a speed change transmission mechanism for a harvesting machine. [Background technology]

[0002] In conventional harvesters, when the speed change lever is operated, the trunnion axis of the continuously variable transmission is rotated via a linkage mechanism such as an interlocking rod, thereby increasing or decreasing the output of the continuously variable transmission and changing the output direction, and further operating the traveling gear, reaping gear, threshing gear, etc. at speeds that correspond to the amount of operation via the transmission case (see Patent Document 1).

[0003] In addition, when entering or leaving the work site (field) or loading the machine onto the truck bed, a pair of left and right plates, known as "steps," are installed at an angle to match the width of the left and right traveling gear, and the machine is driven on them; however, it is necessary to drive carefully so as not to cause the left and right traveling gear to fall off, so it is desirable to set the driving power low and drive as slowly as possible.

[0004] Farm fields in which crops such as rice and wheat are cultivated, in which the stalks are harvested and the grains are separated by a thresher, are basically flat, and the only time the harvester travels on slopes is when entering and leaving the field or for loading work, so there is known technology relating to a harvester incorporating a control configuration that lowers the upper limit of the running power and suppresses the running speed while traveling on slopes when the slope angle is equal to or greater than a certain level and the running power setting allows high-speed running (see Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2011-69470 A [Patent Document 2] JP 2010-178630 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the technology of Patent Document 1, when installing a cabin that covers the area around and above the control section and keeps the inside temperature at an appropriate level with an air conditioner while preventing flying debris such as straw and sand from approaching the operator, it is necessary to provide a linking mechanism that links the shift lever and the continuously variable transmission. This linking mechanism is located inside the cabin and on the lower side of the aircraft body, but since the space in which it is located connects the periphery of the continuously variable transmission with the inside of the cabin, the lever guide groove that moves the shift lever in the fore-and-aft direction and the like become an inlet for outside air.

[0007] This can lead to problems such as the effectiveness of air conditioners being reduced due to the outside temperature, workers being easily fatigued by the effects of the cold and heat, continuous work time being shortened, work efficiency decreasing, and the optimum harvesting period being missed, resulting in a decrease in the commercial value of the harvested products.

[0008] In addition, if impurities such as fine straw and leaf dust generated during harvesting and threshing and sorting, and sand and dust generated during driving get into the cabin, they can mix with the air inside the cabin, making it difficult to breathe and obstructing visibility, thereby reducing work efficiency and driving accuracy.

[0009] In addition, with the technology of Patent Document 2, although the upper output limit is reduced when traveling on a slope, operation of the gear lever is still accepted. Therefore, if the gear lever is mistakenly operated to increase the output or in the reverse direction, the traveling speed may unintentionally increase or the direction of travel may be reversed, which may induce further driving errors by the operator.

[0010] Even if there is no erroneous operation, when the current traveling speed is judged to be too fast even if the upper output limit is lowered, an attempt to reduce the traveling speed by operating the shift lever may result in the continuously variable transmission being operated to the neutral state, causing the vehicle to stop on the spot and reducing work efficiency.

[0011] When driving on an incline, the gear shift lever is often moved slightly forward (or backward) from near the neutral position to drive at a slow speed. However, if one is not accustomed to making such subtle movements, it is difficult to obtain the desired driving speed, and extra time is spent setting the driving speed.

[0012] The present invention aims to solve the above problems by providing a harvester that enables output operation of the continuously variable transmission while maintaining comfort in the cabin, and that allows the continuously variable transmission to be easily operated to output power when traveling at a slow speed. [Means for solving the problem]

[0013] The present invention which has solved the above problems is as follows. The invention of claim 1 relates to a harvester comprising a reaping device (3) on a machine body traveling on a traveling device (2), a threshing device (4) for separating grains from stalks harvested by the reaping device (3), a continuously variable transmission (20) for transmitting driving force to the traveling device (2), the reaping device (3) and the threshing device (4), a control section (5) for an operator to ride in, and a cabin (5b) for covering the periphery and upper part of the control section (5), the continuously variable transmission (20) for continuously changing and stopping the input shaft rotation The harvester is characterized in that it is provided with an input speed change actuator (110b) that stops the shaft rotation on the output side and an output speed change actuator (110a) that steplessly changes and stops the shaft rotation on the output side, and a speed change operating member (16) that adjusts the amount of operation of the input speed change actuator (110b) and the output speed change actuator (110a) in accordance with detection by an angle sensor (16S) is provided in the control section (5), and the speed change operating member (16) is provided with at least the periphery and the bottom of the lower side sealed.

[0014] The invention of claim 2 is the harvester described in claim 1, characterized in that, when the speed change operating member (16) is operated to a position to stop the continuously variable transmission (20), the input speed change actuator (110b) starts an operation to stop the shaft rotation on the input side, and when a predetermined time has elapsed since the stopping operation of the input speed change actuator (110b) started or when the stopping operation is completed, the output speed change actuator (110a) performs an operation to stop the shaft rotation on the output side.

[0015] The invention of claim 3 is the harvester described in claim 1 or 2, characterized in that the continuously variable transmission (20) is configured to be switchable by an auxiliary speed change switching member (17) between a moving side mode in which the vehicle can travel at high speed, a working speed mode in which the vehicle can travel within a speed range suitable for harvesting work, and a neutral mode in which the vehicle stops traveling, and a low speed switch (111) is provided that operates the input speed change actuator (110b) and the output speed change actuator (110a) when the vehicle is in the moving speed mode or the working speed mode, and switches the continuously variable transmission (20) to an extremely low speed mode suitable for travel on slopes, etc., and when the low speed switch (111) is operated when the continuously variable transmission (20) is in the extremely low speed mode, or when the speed change operating member (16) is not operated from the neutral position for a predetermined time, the continuously variable transmission (20) is switched to the work speed mode.

[0016] According to the invention of claim 4, a mowing / threshing switching member (18) is provided which can be operated to a mowing / threshing position where power is transmitted to both the reaping device (3) and the threshing device (4), a threshing position where power is transmitted to the threshing device (4), and a neutral position where power is interrupted. The mowing / threshing switching member (18) is configured to be in the mowing / threshing position when operated toward the front of the machine body, in the threshing position when operated toward the rear of the machine body, and in the neutral position when operated to a position between the mowing / threshing position and the threshing position. When the mowing / threshing switching member (18) is in the mowing / threshing position, The harvester according to claim 3, characterized in that when the continuously variable transmission (20) is in the extremely low speed mode, the control configuration does not accept switching to the extremely low speed mode, and when the cutting and threshing switching member (18) is operated to the cutting and threshing position while maintaining the traveling speed of the extremely low speed mode, the operating speed of the harvesting device (3) and the threshing device (4) is increased to switch to a falling mode suitable for harvesting fallen stalks.

[0017] The invention of claim 5 is the harvester described in claim 4, characterized in that when the mowing / cutting switching member (18) is operated to the mowing position and the speed change lever (16) is operated to the neutral position while the auxiliary speed change switching member (17) is operated, the continuously variable speed change device (20) is alternately switched between the working speed mode and the lying-down mode.

[0018] The invention of claim 6 is a harvester as described in claim 4 or 5, characterized in that a side operation panel (15) on which the speed change operation member (16), a low-speed switch (111) and a mowing / throttling switching member (18) are provided is provided to the side of the operator's seat (5a) of the control section (5), a recess (112) is formed on the side of the body rearward of the rear end of the operation area of ​​the speed change operation member (16) provided on the side operation panel (15), the low-speed switch (111) is provided inside the recess (112), the vertical height of the side wall portion on the operator's seat (5a) side is configured to be lower than the front / rear and left / right sides, and the mowing / throttling switching member (18) is provided on the operator's seat (5a) side of the recess (112). Effect of the Invention

[0019] According to the invention of claim 1, there is no need to form a space connecting the inside and outside of the cabin (5b), so that the outside air is less likely to change the temperature inside the cabin (5b), and the worker can perform harvesting work in a comfortable environment.

[0020] Furthermore, since foreign matter can be prevented from entering the cabin (5b), obstruction of breathing and obstruction of visibility of the worker can be prevented.

[0021] This reduces the frequency of interruptions to work, such as breaks, improving work efficiency, and also prevents missed harvest times due to shortened work hours, preventing deterioration in the quality of the harvested crops and improving their commercial value.

[0022] According to the invention of claim 2, in addition to the effect of the invention of claim 1, when the continuously variable transmission (20) is stopped, the stopping operation of the output speed change actuator (110a) is performed a predetermined time after the stopping operation of the input speed change actuator (110b), so that vibrations caused by impact when the output is stopped can be reduced, and a decrease in durability of parts due to vibrations can be prevented.

[0023] According to the invention of claim 3, in addition to the effects of the invention of claim 1 or 2, by operating the low speed switch (111), the extremely low speed mode is automatically set, eliminating the need for fine adjustment of the speed change lever (16), and enabling stable movement on slopes.

[0024] In addition, when switching from the very low speed mode to the working speed mode, the traveling speed can be prevented from suddenly increasing, thereby preventing the operator from making an operating error in a panic or coming into contact with the stalks at a traveling speed that is not suitable for harvesting work, causing the stalks to become stuck in the harvesting device (3) or to be left unharvested in the field.

[0025] According to the invention of claim 4, in addition to the effects of the invention of claim 3, when the power is transmitted to the harvesting device (3) and the threshing device (4), even if the low-speed switch (111) is operated, the mode does not switch to the extremely low-speed mode. This prevents the low-speed switch (111) from being operated accidentally while traveling to harvest stalks, thereby preventing a sudden decrease in the output of the continuously variable transmission (20), and thus preventing stalks from being left uncut and reducing work efficiency.

[0026] In addition, when the continuously variable transmission (20) is in the very low speed mode, operating the mowing / throwing switching member (18) to the mowing / throwing position switches to the lodging mode, which provides a travel speed and operating speed for each device suitable for harvesting fallen stalks. This eliminates the need for the operator to perform setting operations suitable for the lodging operation, thereby improving operability and work efficiency during lodging.

[0027] According to the invention of claim 5, in addition to the effects of the invention of claim 4, when the auxiliary speed changeover member (17) is operated in the lying-down mode, the working speed mode is switched to one suitable for normal harvesting work, thereby significantly reducing the number of operating steps required by the operator and improving operability and work accuracy.

[0028] According to the invention of claim 6, in addition to the effects of the invention of claim 4 or 5, the low speed switch (111) is configured to be difficult to touch when operating the speed change lever (16), making it difficult to erroneously operate the low speed switch (111) and preventing unintended switching of the continuously variable transmission (20).

[0029] Furthermore, by arranging the mowing / cutting switching member (18) closer to the operator's seat (5a) than the low speed switch (111), it is possible to prevent the low speed switch (111) from being operated erroneously.

[0030] In addition, by configuring the vertical height of the side wall portion of the recess (112) of the low speed switch (111) on the cockpit (5a) side to be lower than other portions, the low speed switch (111) can be easily operated by an operator in the cockpit (5a) when necessary. [Brief description of the drawings]

[0031] [Figure 1] Combine harvester front view [Diagram 2] Top view of a combine harvester [Diagram 3] Left side view of combine harvester [Figure 4] Engine E output rotation transmission diagram [Diagram 5] Transmission diagram of engine E output rotation to the running gear and harvesting equipment [Figure 6] Diagram of main gear shift lever [Figure 7] Diagram of a continuously variable transmission [Figure 8] (a) Graph showing the relationship between the attitude of the main shift lever and the measured value of the angle sensor. (b) Graph showing the relationship between the measured value of the angle sensor and the opening degree of the trunnion shaft. (c) Graph showing the relationship between the opening degree of the trunnion shaft and the set traveling speed of the traveling gear. [Figure 9] (a) A side view showing the outer side of the left side cover of the machine body. (b) A side view showing the inner side of the left side cover of the machine body. [Figure 10] (a) A perspective view showing the inside surface of the right cutting side cover of the machine body. (b) A perspective view showing the outside surface of the right cutting side cover of the machine body. [Figure 11] (a) is a perspective view showing the inside surface of the left upper cutting cover of the machine body; (b) is a perspective view showing the outside surface of the left upper cutting cover of the machine body; [Figure 12] (a) is a perspective view showing the inside surface of the left lower cutting cover of the machine body; (b) is a perspective view showing the outside surface of the left lower cutting cover of the machine body; [Figure 13] (a) A perspective view showing the inside surface of the right upper cutting cover of the machine body. (b) A perspective view showing the outside surface of the right upper cutting cover of the machine body. [Figure 14] (a) A perspective view showing the inside surface of the right lower cutting cover of the machine body. (b) A perspective view showing the outside surface of the right lower cutting cover of the machine body. [Figure 15] A side view of the main part of the control unit having a parking brake pedal [Figure 16] Block diagram showing components related to controlling the engine stop switch to the unlocked state from the cockpit [Figure 17]Side view of a combine harvester with a cab showing the wired foot pedal in use [Figure 18] FIG. 1 is a front view of a main part of a lifting device capable of opening and closing an upper cover; [Figure 19] FIG. 1 is a side view of a main part of a lifting device capable of opening and closing an upper cover; [Figure 20] FIG. 1 is a front view of a main part of a lifting device capable of opening and closing an upper cover of a different configuration. [Figure 21] A plan view of the main part of a relay transport device between a harvesting device and a threshing device equipped with an automatic oiling device. [Figure 22] Block diagram showing components related to switching control of aircraft speed change modes by operating the low-speed switch [Figure 23] A plan view of the main part showing the vicinity of the control unit having a low-speed switch in a recessed portion. [Figure 24] A side view of the main part showing the vicinity of the control unit having a low speed switch in a recessed portion. [Diagram 25] Flowchart showing the control of the input and output speed change solenoids when switching to very low speed mode [Figure 26] Flowchart showing switching control from the very low speed mode to the working speed mode [Figure 27] Flowchart showing switching control between very low speed mode and lying down mode [Figure 28] Flowchart showing the misoperation prevention control that does not accept low-speed switch operation during harvesting work DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] 1 to 3, the combine harvester has a traveling device 2 consisting of a pair of left and right crawlers provided on the underside of a machine frame 1, and a reaping device 3 for harvesting culms growing in a field provided in front of the machine frame 1. In addition, a thresher 4 for threshing and sorting the culms harvested by the reaping device 3 is provided on the left rear side of the reaping device 3, and a control unit 5 for an operator to ride on is provided on the right rear side of the reaping device 3.

[0033] An engine room 6 in which an engine E is mounted is provided below the control unit 5, and a grain tank 7 for storing grains threshed and sorted by the threshing device 4 is provided behind the control unit 5, and the grains stored in the grain tank 7 are discharged to the outside by a discharge auger 70 connected to the grain tank 7. A front panel 10 is provided in front of the driver's seat of the control unit 5, and a side panel 15 is provided to the left of the driver's seat.

[0034] A monitor 11 that displays the output rotation of the engine E and the like is provided on the left side of the front panel 10, and an operation lever 12 that controls the rotation of the traveling device 2 and the elevation and lowering of the reaping device 3 is provided on the right side. The position of the operation lever 12 is measured by an angle sensor 12S, such as a potentiometer, attached to the lower part of the operation lever 12.

[0035] In addition, a parking brake pedal 13 is provided on the front left part of the floor located below the front panel 10, which activates and deactivates a pair of left and right brake devices 38 provided on the transmission 21 described later, and a raking pedal 14 is provided on the front right part of the floor, which engages and disengages the mowing clutch described later.

[0036] The depression posture of the parking brake pedal 13 is measured by a sensor 13S such as a limit switch or a contact sensor attached to the bottom of the parking brake pedal 13, and by an angle sensor 12S such as a potentiometer or a proximity sensor, and the depression posture of the stowing pedal 14 is measured by a sensor 14S such as a limit switch or a contact sensor attached to the bottom of the stowing pedal 14.

[0037] A main speed change lever (referred to as "speed change lever" in the claims) 16 is provided at the front of the side panel 15 to operate a continuously variable transmission 20 which increases or decreases the output rotation of the engine E and switches the direction of rotation, and behind the speed change lever 16 is provided a reaping / threshing lever 18 which operates the connection and disconnection of the harvesting clutch 22 and the threshing clutch 23.

[0038] 4, the output rotation output from the engine E is transmitted to the continuously variable transmission 20 provided on a transmission path ("first transmission path" in the claims) A. The output rotation of the engine E transmitted to the input shaft 44 of the continuously variable transmission 20 is accelerated or decelerated and its rotation direction is switched by the continuously variable transmission 20, and then transmitted to the transmission 21.

[0039] The output rotation of the continuously variable transmission 20 transmitted to the input shaft 30 of the transmission 21 is output from the output shaft 34 via an internal transmission mechanism (not shown) and transmitted to the traveling device 2. The traveling speed v of the traveling device 2 is measured by a speed sensor 2S, such as a tachometer generator attached to the truck wheel or a gyroscope attached to the machine frame 1. The output rotation output from the output shaft 31 of the transmission 21 is transmitted to the harvesting device 3 via the harvesting clutch 22.

[0040] In addition, the output rotation output from the engine E is transmitted to the threshing device 4 via a threshing clutch 23 provided on a transmission path ("second transmission path" in the claims) B.

[0041] 5, the output rotation of the continuously variable transmission 20 is transmitted to an input shaft 30 of the transmission 21. The output rotation transmitted to the input shaft 30 is transmitted to a counter shaft 32 via gears 30A, 31A, and 32A. The gear 30A is provided on the input shaft 30, the gear 31A is rotatably provided on the output shaft 31, and the gear 32A is provided on the counter shaft 32.

[0042] The output rotation transmitted to the counter shaft 32 is transmitted to the counter shaft 33 via the gears 32B and 33A. The gear 32B is provided on the counter shaft 32, and the gear 33A is provided on the counter shaft 33.

[0043] The output rotation transmitted to the counter shaft 33 is transmitted to an output shaft 34 via a pair of left and right gears 33B and a pair of left and right gears 34A provided on both sides of the gear 33A. The gear 33B is provided on the counter shaft 33, and the gear 34A is provided on the output shaft 34 so as to be slidable in the left-right direction.

[0044] A brake device 33C for braking the rotation of the counter shaft 33 is provided on both sides of the pair of left and right gears 33B of the counter shaft 33. As a result, when the operation lever 12 is tilted to the left, the rotation speed of the left gear 33B becomes slower than the rotation speed of the right gear 33B, causing the traveling device 2 to turn to the left in the traveling direction, and when the operation lever 12 is tilted to the right, the rotation speed of the right gear 33B becomes slower than the rotation speed of the left gear 33B, causing the traveling device 2 to turn to the right in the traveling direction.

[0045] The output rotation transmitted to the output shaft 34 is transmitted to the input shaft 35 of the traveling device 2 via a pair of left and right gears 34B and a pair of left and right gears 35A provided on the outside of the gear 34A. The gear 34B is provided on the output shaft 34 so as to be slidable in the left and right direction, and the gear 35A is provided on the input shaft 35.

[0046] The output rotation transmitted to the counter shaft 32 is transmitted to the output shaft 31 via gears 32C and 31B, or gears 32D and 31C. Gears 32C and 32D are provided on the counter shaft 32, and gears 31B and 31C are provided on the output shaft 31 so as to be slidable in the left-right direction. Gears 31B and 31C can be moved in the left-right direction via a shifter 36 by operating a shifter device (not shown).

[0047] The output rotation transmitted to the output shaft 31 is transmitted to the input shaft 37 of the mowing device 3 via the mowing clutch 22 .

[0048] As shown in FIG. 6, when the shift lever 16 is in the neutral position, the output rotation of the continuously variable transmission 20 is zero. When the shift lever 16 is tilted forward from the neutral position, the rotation direction of the output rotation of the continuously variable transmission 20 becomes forward rotation, which is the same as the rotation direction of the output rotation of the engine E. When the tilt angle of the forward tilt position is increased, the output rotation of the continuously variable transmission 20 is increased, and when the tilt angle of the forward tilt position is decreased, the output rotation of the continuously variable transmission 20 is decreased. When the shift lever 16 is tilted backward from the neutral position, the rotation direction of the output rotation of the continuously variable transmission 20 becomes reverse rotation, which is the opposite to the rotation direction of the output rotation of the engine E. When the tilt angle of the rear tilt position is increased, the output rotation of the continuously variable transmission 20 is increased, and when the tilt angle of the rear tilt position is decreased, the output rotation of the continuously variable transmission 20 is decreased. The position of the shift lever 16 is measured by an angle sensor 16S, such as a potentiometer, attached to the lower part of the shift lever 16.

[0049] When the cutting / threshing lever 18 is in the forward tilted position, the cutting clutch 22 and the threshing clutch 23 are disengaged. When the cutting / threshing lever 18 is in the rearward tilted position, the cutting clutch 22 and the threshing clutch 23 are engaged. When the cutting / threshing lever 18 is in a neutral position which is between the forward tilted position and the rearward tilted position, the cutting clutch 22 is disengaged and the threshing clutch 23 is engaged. The position of the cutting / threshing lever 18 is measured by a cutting / threshing sensor 18S, such as a potentiometer, attached to the bottom of the cutting / threshing lever 18.

[0050] As shown in Fig. 7, a sector gear 41 is supported on the trunnion shaft 40 of the continuously variable transmission 20, and a gear formed on the outer periphery of the sector gear 41 is engaged with a gear 42A provided on the output shaft of a forward motor (the "drive means" in the claims) 42 and a gear 43A provided on the output shaft of a reverse motor (the "drive means" in the claims). As a result, the forward motor 42 and the reverse motor 43 are driven based on the attitude of the speed change lever 16, i.e., the measured value of the angle sensor 16S, to rotate the trunnion shaft 40 of the continuously variable transmission 20, thereby increasing or decreasing the output rotation of the engine E and switching the rotation direction. The output rotation of the engine E is transmitted to an input shaft 44 of the continuously variable transmission 20.

[0051] In addition, while Figure 7 illustrates a configuration in which the trunnion shaft 40 of the continuously variable transmission 20 is rotated by a forward motor 42 and a reverse motor 43 via a sector gear 41, it is also possible to support an arm extending radially on the trunnion shaft 40 of the continuously variable transmission 20, and to connect to the outer periphery of this arm a forward cylinder driven by a forward solenoid and a reverse cylinder driven by a reverse solenoid.

[0052] In Fig. 8(a), the horizontal axis represents the position of the shift lever 16, and the vertical axis represents the measurement value θ of the angle sensor 16S. When the shift lever 16 is moved from the neutral position to the forward tilt position, the measurement value θ of the angle sensor 16S increases linearly. In this embodiment, when the shift lever 16 is moved to the neutral position, the measurement value θ of the angle sensor 16S is set to θ1, and when the shift lever 16 is moved to the maximum forward tilt position where it is tilted most forward, the measurement value θ of the angle sensor 16S is set to θ2.

[0053] 8(b), the horizontal axis indicates the measurement value θ of the angle sensor 16S, and the vertical axis indicates the opening degree β of the trunnion shaft 40 of the continuously variable transmission 20. When the speed change lever 16 is moved from the neutral position to the maximum front tilt position and the measurement value θ of the angle sensor 16S increases from θ1 to θ2, the opening degree β of the trunnion shaft 40 also increases linearly. In this embodiment, when the measurement value θ of the angle sensor 16S is θ1, the opening degree β of the trunnion shaft 40 is set to β1, and when the measurement value θ of the angle sensor 16S is θ2, the opening degree β of the trunnion shaft 40 is set to β2.

[0054] The opening β of the trunnion shaft 40 is set to increase linearly from β1 to β3 which is greater than β2. As a result, when the speed change lever 16 is moved to the maximum front tilt position, if the travel speed v2 of the traveling device 2 is slower than the set travel speed V2, the opening β of the trunnion shaft 40 can be made even greater than β2 to increase the travel speed v2 to the set travel speed V2.

[0055] 8(c), the horizontal axis indicates the opening degree β of the trunnion shaft 40 of the continuously variable transmission 20, and the vertical axis indicates the set traveling speed V of the traveling device 2. When the opening degree β of the trunnion shaft 40 increases from β1 to β2, the set traveling speed V of the traveling device 2 also increases linearly.

[0056] In this embodiment, when the opening β of the trunnion shaft 40 is β1, the set traveling speed V of the traveling device 2 is set to V1, when the opening β of the trunnion shaft 40 is β2, the set traveling speed V of the traveling device 2 is set to V2, and when the opening β of the trunnion shaft 40 is β3, the set traveling speed V is set to V3 which is faster than V2. As a result, when the speed change lever 16 is moved from the neutral position to the maximum front tilt position, the set traveling speed V of the traveling device 2 increases from V1 to V2, and ideally the traveling speed v of the traveling device 2 can also increase from v1 to v2.

[0057] The basic layout of a combine harvester is as shown in Figures 1 to 3, with a threshing device 4 that threshes, sorts and transports the stalks harvested by the harvesting device 3 on one side of the body frame 1, and a grain tank 7 that stores the threshed grains on the other side.

[0058] 9(a)(b) and 10(a)(b), reaping side covers 50L, 50R are attached to the left and right sides of the reaping device 3, respectively, to prevent the culms adjacent to the reaping rows from entering the reaping section or coming into contact with the transmission mechanism. The reaping side covers 50L, 50R are each formed with a removable opening 52L, 52R.

[0059] As shown in Figs. 9(a)(b) and 10(a)(b), the left and right cutting side covers 50L, 50R have different shapes of the cutout portions 51L, 51R on the rear side of the machine body.

[0060] 11(a) and 11(b), the left-side cutting side cover 50L is formed by connecting an upper-left cutting cover 53L and a lower-left cutting cover 54L. A connecting protrusion 55L that protrudes downward and is within the front-to-rear and left-to-right width of the bottom of the upper-left cutting cover 53L is formed on the lower side of the upper-left cutting cover 53L, and a connecting recess 56L that corresponds to the connecting protrusion 55L is formed on the upper side of the lower-left cutting cover 54L.

[0061] The outer wall 55La of the connecting protrusion 55L is a plate-like structure extending in the fore-and-aft direction with no gaps except for a plurality of first mounting holes 55Lz... formed in the front and rear for attaching fixing members such as bolts (not shown), and a U-shaped front mounting groove 55Ly with the inside of the aircraft cut out is formed near the vertical center of the front end wall 55Lb, and the rear end wall 55Lc is formed shorter than the vertical width of the front wall 55Lb.

[0062] The lower wall 55Ld and the bottom of the upper-left cutting cover 53L have cutouts of the same shape formed inside the machine body, and the lower wall 55Ld has lower ribs 57L formed at predetermined intervals. Furthermore, upper ribs 58L that are triangular in front (rear) view are formed on the bottom of the upper-left cutting cover 53L at positions that are the upper parts of the lower ribs 57L and at a position that is the upper part of the rear wall 55Lc.

[0063] In addition, a rear mounting groove 55Lx is formed behind the rearmost upper rib 58L by cutting out the inside of the aircraft body.

[0064] Furthermore, the left upper cutting cover 53L is inclined upward toward the rear from the lower to the upper front end, and bends downward in an acute arc near the apex. A straight section is formed from the front end to the rear of the machine body, where the connecting protrusion 55L is formed, and the rear end of the cover bends upward in an arc close to a right angle, then inclines upward toward the rear and merges with the upper and lower straight sections at the upper rear end. In other words, the left upper cutting cover 53L has a shape in which the right angle of a right triangle is cut out in a shape that approximates a triangle when viewed from the side.

[0065] In addition, a rectangular window portion is formed in the rear portion of the upper left cutting cover 53L near the vertical straight portion to allow a locking mechanism (not shown) that attaches the cover to pass through.

[0066] 12(a) and 12(b), the left lower cutting cover 54L has a front wall 59Lb, a rear wall 59Lc, and a lower wall 59Ld cut out at an interval corresponding to the front-to-rear width and the vertical length of the connecting protrusion 55L, and no wall is provided inside the machine body to form a connecting recess 56L. The lower wall 59Ld is disposed below the lower ends of the front wall 59Lb and the rear wall 59Lc, and the vicinity of the lower ends of the front wall 59Lb and the rear wall 59Lc act as rib members. A receiving groove 58Lx corresponding to the rear mounting groove 55Lx is formed behind the rear wall 59L.

[0067] In addition, a U-shaped front mounting groove 58Ly is formed in the front wall 59Lb with the inside of the body cut out, and a plurality of upper mounting ribs 60L... having second mounting holes 58Lz at positions corresponding to the first mounting holes 55Lz... of the connecting protrusion 55L are formed on the upper side of the body of the lower wall 59Ld and between the front and rear walls 59Lb and 59Lc, and an upper rib 62L without a second mounting hole 58Lz is formed between these. A plurality of triangular or trapezoidal lower retaining ribs 61L... are formed on the lower side of the lower wall 59Lb at intervals narrower than the front-to-rear intervals between the upper mounting ribs 60L... and the upper rib 62L.

[0068] The portion where the connecting recess 56L at the top of the left lower cutting cover 54 is formed is straight in the fore-to-aft direction, and the front end of this straight portion is in a front-downward inclined position toward the front lower side of the machine body, and at the very front it bends in an arc downward toward the machine body, forming a straight portion with a rear-downward inclination toward the rear of the machine body, and its rear end is in a rear-upward inclined position facing upward at a position below the connecting recess 56.

[0069] Furthermore, the rear end of the rear-upward inclined attitude section tilts forward in an arc toward the front of the aircraft, and then has a straight section that is nearly vertical toward the upper straight section, so that in side view the upper part is trapezoidal and the lower part is shaped like a right-angled triangle, and a notched space is created at the rear of the upper part of the aircraft.

[0070] In addition, a square window is formed near the inclined straight portion on the front side of the left lower cutting cover 54L to allow a locking mechanism (not shown) for attaching the cover to pass through.

[0071] The upper left cutting cover 53L and the lower left cutting cover 54L are combined together to form the left cutting side cover 50L.

[0072] At this time, the multiple upper ribs 58L, lower ribs 57L, and lower retaining ribs 61L are arranged in front-to-back positions aligned vertically. As a result, the multiple ribs receive and distribute the load, reducing the load on the fixing members such as bolts attached during connection, and preventing the fixing members from breaking due to the load and releasing the connection.

[0073] Next, the right-side cutting side cover 50R is formed by connecting an upper right cutting cover 53R and a lower right cutting cover 54R. As shown in Fig. 13(a) and (b), a connecting protrusion 55R that protrudes downward and is within the front-to-rear and left-to-right width of the bottom of the upper right cutting cover 53R is formed on the lower side of the upper right cutting cover 53R, and a connecting recess 56R that corresponds to the connecting protrusion 55R is formed on the upper side of the lower right cutting cover 54R.

[0074] The outer wall 55Ra of the connecting protrusion 55R is a plate-like shape extending in the fore-and-aft direction with no gaps except for a plurality of first mounting holes 55Rz... formed at the front and rear for attaching fixing members such as bolts (not shown), and a U-shaped front mounting groove 55Ry is formed near the vertical center of the front end wall 55Rb of the front end with a notch cut out on the inside of the aircraft, and the rear end wall 55Rc has a notch formed on the inside of the aircraft that is in an inverted L-shape when viewed from behind.

[0075] Also, the lower wall 55Rd and the bottom of the upper right cutting cover 53R have cutouts of the same shape formed inside the machine body, and the lower wall 55Rd has lower ribs 57R... formed at predetermined intervals. Furthermore, upper ribs 58R... that are triangular in front (rear) view are formed on the bottom of the upper right cutting cover 53R at positions that are the upper parts of the lower ribs 57R... and at a position that is the upper part of the rear wall 55Rc.

[0076] In addition, a rear mounting groove 55Rx is formed behind the rearmost upper rib 58R by cutting out the inner side of the aircraft body.

[0077] In addition, the upper right cutting cover 53R is inclined upward toward the rear from the lower front end to the upper part, and near the top of the cover, a protrusion is formed on the front side of the machine body before bending backward in an obtuse arc to form the front and rear parts on the upper side of the machine body. The rear ends of the front and rear parts form an inclined part toward the lower rear side of the machine body, and have an inclined surface that draws an acute arc and faces downward toward the front side, and the inclination angle of this inclined surface becomes gentler midway and further faces the front side of the machine body. After bending downward toward the machine body at an angle close to vertical near the center of the front and rear of the machine body, the lower end is connected to the rear part of the lower wall 55Rd.

[0078] As a result, the upper right cover 53R has a trapezoidal shape in a side view and has a cutout portion that is long in the front-rear direction on the lower rear side of the vehicle body.

[0079] Next, as shown in Fig. 14(a) and (b), the right lower cutting cover 54R has a cutout on the inside of the machine body at the top end surface, and a front wall 59Rb, a rear wall 59Rc, and a lower wall 59Rd are provided at intervals corresponding to the front-to-rear width and the up-to-down length of the connecting protrusion 55R, and nothing is provided on the inside of the machine body, forming a connecting recess 56R. The lower wall 59Rd is disposed above the lower end of the front wall 59Rb and below the lower end of the rear wall 59Rc, and the rear end of the lower wall 59Rd is inclined upward toward the lower end of the rear wall 59Rc. The front wall 59Rb has a protrusion acting as a rib member near the lower end, but the rear wall 59Rc has no protrusion at the lower part.

[0080] The front wall 59Rb is formed with a U-shaped front mounting groove 55Ry with the inside of the machine body cut out, and a plurality of upper mounting ribs 60R having second mounting holes 58Rz at positions corresponding to the first mounting holes 55Rz of the connecting protrusion 55R are formed on the upper side of the machine body of the lower wall 59Rd and between the front wall 59Rb and the rear wall 59Rc. A plurality of lower retaining ribs 61R are formed on the lower side of the machine body of the lower wall 59Rd at intervals equal to the front-rear intervals between the upper mounting ribs 60R and the upper rib 62R. A receiving groove 58Rx corresponding to the rear mounting groove 55Rx is cut out and formed behind the connecting recess 56R.

[0081] These upper mounting ribs 60R... and lower retaining ribs 61R... may preferably be formed in a scalene triangle or a scalene trapezoid, or in a shape similar thereto.

[0082] The portion where the connecting recess 56R on the upper part of the right lower cutting cover 54 is formed is straight in the fore-to-aft direction, and the front end of this straight portion has a front-down inclined position toward the front lower side of the machine body, and at the very front it bends in an arc downward toward the machine body, forming a straight portion with a rear-down inclined position toward the rear of the machine body, and its rear end has a rear-up inclined position that faces upward at a position below the connecting recess 56.

[0083] Furthermore, the rear-upward inclined portion is angled more acutely toward the upper rear side of the aircraft and connected to the rear end of the upper front-rear straight portion, resulting in an overall trapezoidal shape in side view with a right-angled triangular cutout space at the rear of the aircraft.

[0084] In addition, a square window portion is formed near the inclined straight portion on the front side of the lower right cutting cover 54R to allow a locking mechanism (not shown) for attaching the cover to pass through.

[0085] The right side cutting cover 50R is formed by combining the upper right cutting cover 53R and the lower right cutting cover 54R.

[0086] The right side cutting cover 50R is formed by combining the upper right cutting cover 53R and the lower right cutting cover 54R. At this time, the lower retaining rib 61R located below the upper rib 62R is positioned in a front-to-back position aligned vertically with the upper rib 58R and lower rib 57R of the upper cutting cover 53R, and the upper mounting ribs 60R in which the second mounting holes 58Rz are formed are positioned in a position that does not overlap in front-to-back positions with the upper ribs 58R and lower ribs 57R of the upper cutting cover 53R. This makes it less likely that the front-to-back positions of the first mounting holes 55Rz and the second mounting holes 58Rz will be misaligned, so that the upper cutting cover 53R and the lower cutting cover 54R can be easily and reliably assembled together by inserting fixing members such as bolts, improving work efficiency. The left and right cutting covers 50L, 50R are constructed by inserting the connecting protrusions 55L, 55R, which are also shaped like a box, into the connecting recesses 56L, 56R, which are shaped like a box, and inserting and fixing fixing members through the first mounting holes 55Lz...,Rz and the second mounting holes 58Lz...,Rz. This makes it easier to align the left and right upper cutting covers 53L, 53R and the lower cutting covers 54L, 54R when assembling them, and prevents the occurrence of gaps that could cause the stalks at adjacent work positions that are not to be cut to get caught when they come into contact.

[0087] This prevents the stalks at adjacent work positions from getting caught in the gap when they come into contact with the left and right side covers 50L, 50R, causing parts of the stalks, particularly the tips that are to be harvested, to be torn off, thereby preventing a decrease in yield and quality.

[0088] In addition, by aligning and positioning the box-shaped connecting recesses 56L, 56R and the connecting protrusions 55L, 55R, the positioning can be uniform even if different workers attach and detach the left and right side covers 50L, 50R, so proper assembly can be performed regardless of experience or level of skill.

[0089] In addition, by forming a plurality of ribs (57L, 57R, 58L, 58R, 60L, 60R, 61L, 61R) vertically on the upper and lower sides of the lower walls 59Ld, 59Rd of the box-shaped connecting recesses 56L, 56R and the lower walls 55d, 55Rd of the connecting protrusions 55L, 55R, the strength of the lower walls 55d, 55Rd, 59Ld, 59Rd can be sufficiently ensured.

[0090] Furthermore, since the connecting protrusions 55L, 55R and the box-shaped connecting recesses 56L, 56R have no walls inside the machine body, they can be connected or separated even if moved slightly diagonally upward or downward, improving work efficiency.

[0091] In addition, when removing the left and right side covers 50L, 50R for maintenance, etc., the bolts and other fastening members connecting the left and right upper cutting covers 53L, 53R and the left and right lower cutting covers 54L, 54R can be first removed to separate the top and bottom, thereby reducing the size and weight of the cover parts to be removed and the effort required for removal and attachment.

[0092] In addition, since the left and right side covers 50L, 50R have different shapes, they do not interfere with the structures of the transmission mechanism, etc., on the side closer to the control unit 5 and the side closer to the threshing device 4, preventing a decrease in work efficiency and preventing mistakes when assembling the left and right, thereby reducing the time required for maintenance work.

[0093] The thresher 4 moves the machine forward using the travelling device 2 to continuously transport the culms harvested by the harvester 3, and separates the grains from the tips while clamping and transporting the culms backward. However, there are cases where the combine is not moved and the worker manually sets the culms harvested by hand on the feed chain of the thresher 4 for threshing. This is done after some of the culms are manually harvested before the combine harvester begins harvesting work to create a path for the combine to enter the field, or after the harvester has mostly finished harvesting work in the field, when the worker manually harvests the culms that were left behind by the combine, and is also called manual threshing.

[0094] When performing this manual threshing operation, the manual threshing operation lever 71 provided on the threshing device 4 is operated to the manual threshing operation position. This causes the output upper limit of the continuously variable transmission 20 to be adjusted downward, and the transport speed of the stalks is slowed down (by approximately 30%) compared to when the stalks are traveling.

[0095] In addition, if an excessive amount of straw is put in at one time, or if the worker's gloves or even his hand gets caught in the feed chain, a load is generated that does not occur when a normal amount of straw is put in. Therefore, a load sensor 72 is provided to detect this load, and when the load sensor 72 detects this load, the threshing clutch 23, which switches the transmission to the threshing device 4 on and off, is cut off by activating the corresponding threshing on / off motor 23a.

[0096] As mentioned above, the worker must get close to the drive unit, called the feed chain, to add the stalks, and in order to reduce the dangers of manual threshing, which requires the worker to add the appropriate amount of stalks himself, the system has been designed to limit the output and to have an emergency stop in case of pinching.

[0097] Depending on the type of work, when threshing work is to be performed by hand, the operator stops the combine harvester from traveling, gets off the control unit 5, and stands to the side of the threshing device 4. At this time, if the output of the continuously variable transmission 20 is set to 0 (neutral), the machine will not travel, but when the operator operates the threshing work lever 71 to perform threshing work and the continuously variable transmission 20 is set to the output state, the driving force is also transmitted to the traveling device 2, which may cause the machine to move.

[0098] To prevent such problems from occurring, when an operator gets off the machine from the control section 5 to perform hand-handling work, it is necessary to operate the parking brake pedal 13 so that the machine will not move even if the driving force is transmitted to the traveling device 2. Also, if there is another operator in the cockpit and he forgets that he is performing hand-handling work and operates the machine's output control or clutch on / off, the conveying speed of the feed chain may increase or the machine may start to move, so it is preferable that there is no operator in the control section 5.

[0099] Therefore, the cockpit seat 5a of the cockpit section 5 is provided with a seating sensor 74 that detects whether an operator is seated thereon by the load.

[0100] In addition, an engine stop switch 75 is provided near the steering unit 5 and the conveyance start end of the feed chain, which when pressed in stops the engine E and also stops the traveling device 2, the reaping device 3, and the threshing device 4. When this engine stop switch 75 is pressed, it turns off due to the internal spring force, and will not return to its original position unless a certain force is applied to turn it after being pressed in, and if it is not in its original position, it will not accept a restart of the engine E.

[0101] In the event of an emergency, the threshing operation can be stopped immediately if a straw or a hand becomes caught by operating the engine stop switch 75, thereby preventing damage to the machine and injury to the worker. The operation of this engine stop switch 75 takes priority over the operating status of other sensors, switches, levers, etc.

[0102] Furthermore, after operating this engine stop switch 75 to stop the engine E, if the operator simply operates the engine stop switch 75 again to return to manual operation without eliminating the cause that led to the stopping operation, there is a high possibility that a similar problem will occur again, causing the engine E to be stopped again.

[0103] Therefore, after the engine E is forcibly stopped, it is desirable that the output of the continuously variable transmission 20 be zero and that the driving forces to the traveling device 2, the reaping device 3 and the threshing device 4 be cut off.

[0104] In order to maintain the above-mentioned safe configuration, as shown in Figures 15 and 16, an angle sensor 16S such as a potentiometer is provided below the gear shift lever 16, and a brake sensor 13a is provided to detect whether the parking brake pedal 13 is operated to the applied position. When the engine E is forcibly stopped by operating the engine stop switch 75, if an attempt is made to start the engine E by operating the key, the electrical system is turned on, and the presence or absence of detection or the detection values ​​of the seating sensor 74, the brake sensor 13a, and the angle sensor 16S are obtained.

[0105] At this time, if the seating sensor 74 is not detecting, the angle sensor is at 0 (neutral position), and the brake sensor 13a detects the brake position, the control device 100 energizes the solenoid to push in and rotate the engine stop switch 75, making it possible to return it to its original position. By returning the engine stop switch 75 to its original standby position, the engine E can be started, i.e., energization by key operation can be accepted.

[0106] By requiring the above-mentioned restart operation of engine E, the worker must manually ensure safety during the work, and therefore there is no need to frequently perform forced shutdown operations of engine E.

[0107] An intention mechanism such as the above-mentioned engine E restart restriction can also be used to improve safety during manual operation.

[0108] When the angle sensor 16S detects that the above-mentioned speed change lever 16 is in the neutral position and the brake sensor 13a detects that the parking brake pedal 13 is depressed and operated to the parked position, and the hand-threshing operation lever 71 is operated, the threshing clutch 23, which switches the transmission to the threshing device 4 on and off, is connected, and the continuously variable transmission 20 is configured to output from 0 to the set output.In this way, the threshing device 4 is sent a driving force so that it can transport straw and perform threshing operations, but the driving force is not transmitted to the traveling device 2, and even if it were transmitted, it will be maintained in a state where it cannot run, thereby preventing the machine from suddenly moving during hand-threshing operations.

[0109] This allows the manual handling work to be carried out safely and stably.

[0110] In addition, if there are multiple operators, one operator can stand at the cockpit 5 to check the status of the manual handling work of the other operators, and if a problem occurs, the operator can sit in the cockpit 5a, set the seating sensor 74 to a detection state, and stop the manual handling work.

[0111] If the blockage is caused by grain straw, the worker will not panic. However, if the worker's gloves or hands get caught in the traffic, the worker may not be able to make proper judgments and may not be able to immediately press the engine stop switch 75.

[0112] Therefore, if any discomfort occurs during manual threshing work, the operator of the control section 5 can simply sit in the control seat 5a to stop the engine E and the transmission of power to the threshing device 4, thereby ensuring the safety of the work and preventing the operator from getting injured.

[0113] However, even with the above configuration, if the conditions are met and the hand-threshing lever 71 is operated to the working side, the feed chain will continue to move, creating the problem that an operator who is unfamiliar with hand-threshing operations will find it difficult to place the stalks on the feed chain properly.

[0114] To address this problem, as shown in FIG. 17, a wired foot pedal 77 that the operator operates by stepping on it is provided in an empty space in the control unit 5, and a connection coupler 77b is attached to the end of the connection cable 76a of this wired foot pedal 77.

[0115] A receiving coupler 77c that meshes with the connecting coupler 77b is provided on the front side and outside of the threshing device 4, and by connecting the connecting coupler 77b and the receiving coupler 77c, the continuously variable transmission 20 can be configured to output up to the set output while the wired foot pedal 77 is being depressed, and transmit power to the threshing device 4. When the operation of the wired foot pedal 77 is stopped, the output of the continuously variable transmission 20 decreases toward 0, but the engine E does not stop.

[0116] As a result, power is transmitted to the feed chain only while the wired foot pedal 77 is being pressed, so that by slowing down the feed chain or stopping it completely when loading the stalks, the stalks can be threshed by the threshing device 4 in a stable position.

[0117] In addition, since the operation of the wired foot pedal 77 determines whether the feed chain operates or not, if the operation of the wired foot pedal 77 is stopped when the feed chain is about to become clogged with straw or when the gloves are about to get caught, the feed chain also stops immediately, preventing damage to the machine body and injury to personnel.

[0118] The harvesting device 3 is provided with multiple lifting devices 80 on the left and right sides which lift up fallen culms and stems and leaves in the field and reliably separate them from the field with a harvesting blade, and is configured to lift up multiple rows of culms as the machine body moves forward for harvesting.

[0119] As shown in Figures 18 and 19, these lifting devices 80... are attached to branch transmission cases 82... provided on a lifting transmission shaft 81 that is provided across the left and right direction near the upper end of the harvesting device 3, and are configured to obtain driving force.

[0120] As the machine moves forward, culms continuously enter between the left and right sides of the above-mentioned lifting devices 80..., but when the diameter of the culms increases due to growth or when they are wet with water such as rain, the lifting does not work properly and the culms become stagnant and clogged, causing the harvesting device 3 to stop moving.

[0121] At this time, the worker needs to remove the stalks to clear the jam, but since the lifting devices 80 are each fixed in place, the worker needs to move the harvesting device 3 slightly upward, and then use the opening and closing mechanism to open the harvesting device 3 using one of the left or right sides as a pivot point, and then perform the work of removing the jammed stalks.

[0122] To carry out the above work, it is necessary to raise and lower the reaping device 3, unlock it, and open and close it, which lengthens the work time and results in longer interruptions to harvesting work.

[0123] To solve this problem, of the multiple lifting devices 80... installed on the left and right sides of the mowing device 3, the outer left and right lifting devices 80L, 80R remain fixed as before, and one or more pivoting lifting devices 80C... located between the left and right are attached to a grass dividing frame 83... installed at the bottom of the mowing device 3 via a pivoting support shaft 84 so that they can be freely rotated back and forth, and the upper side of this pivoting lifting device 80C... is configured to be connected by inserting a lifting transmission shaft (not shown) extending from the branch transmission case 82... toward the upper front side of the machine when it is rotated toward the rear of the machine.

[0124] Furthermore, the upper portion of the lift-up cover 85 provided on the front side of the machine body is formed longer upward than the lift-up covers 85 on both the left and right sides to form upper extensions 85a, and these upper extensions 85a are formed with cutouts 85b in the left-right direction.

[0125] An upper cover 86 is provided on the upper part of the harvesting device 3, covering the front, rear and upper parts of the lifting transmission shaft 81. The portion of this upper cover 86 located on the upper part of the pivoting lifting device 80C is formed as a lock cover 86a... that is capable of rotating in the vertical direction, and each lower end is formed with a lock hook 86b that fits into the cutout hole portion 85b.

[0126] By inserting the lock hook 86b into the cutout hole 85b, the forward and backward rotation of the rotation and lifting device 80C is restricted, and by rotating the lock cover 86a upward and pulling the lock hook 86b out of the cutout hole 85b, the rotation and lifting device 80C becomes capable of rotating forward and backward.

[0127] In reality, the upper side of the rotation raising devices 80C... and the branch transmission cases 82... are also connected with fixing members such as bolts, and by releasing the connection, forward and backward rotation is possible.

[0128] Depending on the number of cutting rows, the branch transmission case 82 is provided with a pair of left and right rotating and lifting devices 80C, i.e., two. Therefore, by making the lock covers 86a... the same width as the two rotating and lifting devices 80C, 80C, the number of steps required for disconnecting the connection can be reduced. In this case, the lock hooks 86b are formed in the same number as the notched holes 85b at the top of the rotating and lifting devices 80C.

[0129] The multiple culms harvested by the harvesting device 3 are transported in a line to the feed chain of the threshing device 4 as the transport paths converge toward the rear of the harvesting device 3, but an intermediary transport device 87 is placed between the front and rear of the harvesting device 3 and the threshing device 4, and sends the converged and lined up culms to the rear. This intermediary transport device 87 receives driving force from the same drive source as the harvesting device 3, etc., and drives an intermediary chain (not shown) with medium-diameter lugs 88 arranged at regular intervals, and like other chains, requires regular lubrication with oil.

[0130] For this reason, an automatic oiling device is placed on the path of the relay chain and set to an oiling state while the relay chain is rotated, allowing the worker to oil the relay conveying device 87 without having to make contact with the oiling device, thereby preventing the chain from flying off due to a lack of lubricating oil or malfunctioning due to seizure.

[0131] The switching operation section for switching between the oil-filled and non-oiled states of this automatic oil-filling device is provided near the rear of one of the left and right ends of the body of the harvesting device 3, i.e., near the outer end of the body, since the relay transport device 87 is positioned toward one of the left and right sides of the body.

[0132] This allows the operator to switch between the refueled and non-refueled states without removing covers or other fittings from the aircraft, thereby reducing the time and effort required for maintenance work such as refueling.

[0133] However, if the automatic oil supply state is forgotten to be switched to the non-oiling state after the oil supply operation is completed, the lubricating oil will continue to be supplied sequentially while the relay conveying device 87 is operating, which will result in the use of an excessive amount of lubricating oil. In addition, the centrifugal force generated during rotation may cause the lubricating oil to splash around, and it may adhere to the medium-diameter lug 88, thereby contaminating the stalks.

[0134] Whether the automatic oiling device is in the oiling or non-oiling state can be determined by intentionally increasing the operating range of the switching operation member so that the operating position can be determined from the outside even from a distance, by providing a switch or sensor to detect the operating position, and by providing a lamp or the like on the control unit 5 which turns on when the device is in the oiling state, thereby preventing stalk harvesting work from being performed while the device is in the oiling state.

[0135] However, because the switching operation member for the automatic refueling device is provided near one of the left and right ends of the aircraft, when switching from the refueling state to the non-refueling state, the operator must temporarily leave the control unit 5 to perform the switching operation, which results in the problem of spending extra time and effort on the operation. Particularly in medium to large aircraft with a cabin provided in the control unit 5, getting on and off requires consideration of opening and closing the door and the height, which takes some time, resulting in a large consumption of time and effort.

[0136] To address the above problem, as shown in Fig. 21, an automatic oil supply device 90 is disposed on the left or right side of the machine body of the relay conveying device 87 and on the rear side of the machine body, i.e., in the non-conveying area of ​​the relay chain where the relay lugs 88 do not convey the stalks. This automatic oil supply device 90 allows the lubricating oil to naturally fall from above to below, and is disposed facing the top of the relay chain on an oil supply support stay 91 provided on the upper cover 87a of the relay conveying device 87 so that an oil supply port through which the lubricating oil flows when it comes into contact with the relay chain faces the upper surface of the relay chain. This oil supply support stay 91 has a base connected to the upper cover 87a and is disposed in an upwardly protruding position and is not supported by other frames or the like.

[0137] A refueling switch lever 92 for opening and closing the refueling port of the automatic refueling device 90 is disposed at the top of the automatic refueling device 90 and at a position where an operator on the control unit 5 can easily operate it by extending his / her arm toward either the left or right side of the aircraft (the left arm when facing the aircraft's traveling direction). When switching between the refueling state and the non-refueling state, the refueling switch lever 92 has positions that differ by 90 to 180 degrees, so that the state can be visually determined from the control unit 5. This makes it easier to prevent starting harvesting work while the automatic oiling device 90 is still oiled, thereby preventing the stalks from adhering to the lubricating oil, which could lead to a reduced yield, and preventing waste straw with the lubricating oil adhering to it from being discharged into the field, causing the lubricating oil to flow into the soil or water.

[0138] In addition, by preventing the lubricating oil from splashing to areas where it is not needed, the waste of the lubricating oil and the need to remove the lubricating oil are prevented, thereby preventing workers from having to spend extra time and effort.

[0139] In addition, if maintenance work is forgotten and the relay conveying device 87 begins to operate abnormally due to a lack of lubricating oil, the harvesting work can be interrupted and the automatic oiling device 90 can be switched to an oiling state to perform the oiling work, thereby preventing the interruption of the harvesting work due to the need for the relay conveying device 87 to cause a blockage when the stalks being transported are sent to the feed chain.

[0140] In addition, since it is possible to prevent the relay transport device 87 from being damaged due to seizure, which would make it impossible to carry out the harvesting work, it is possible to carry out the harvesting work of the stalks without missing the optimum harvesting period, and to prevent a deterioration in the quality of the harvested product.

[0141] In conventional combine harvesters, the output rotation of the continuously variable transmission is increased or decreased via the transmission, but this requires the provision of multiple components to connect the internal speed change gears to the sub-speed change lever that switches between these gear groups. This necessitates the provision of space for the interlocking components, which results in a problem that limits the layout of the sub-speed change lever.

[0142] Furthermore, if a mechanism for linking the sub-shift lever and the shift gear mechanism is provided, a space is created around the location of the linking member, which makes it easier for vibrations and outside air to be transmitted from the location of the sub-shift lever to the area around the driver's seat. This outside air may make the operator feel even hotter depending on the surrounding temperature, and may also contain straw dust from harvesting operations such as reaping, threshing, and straw removal, or sand dust generated during driving, which may cause problems such as putting an extra burden on the operator and tiring him out.

[0143] In an open-top combine harvester where the area around the driver's seat is exposed, the above problem is minor, and the worker can reduce the burden by taking measures to protect against dust and heat. However, in a combine harvester where the area around and above the worker is covered and the cabin 5b is equipped with an air conditioner, the gap around the sub-shift lever becomes a path through which hot and humid outside air and fine impurities generated by harvesting and traveling can enter, causing a problem of impairing airtightness.

[0144] To solve this problem, as shown in Figures 22 to 24, the continuously variable transmission 20 is provided with an output speed change solenoid 110a that sends the operating position of the speed change lever 16 detected by the angle sensor 16S to the control device 100 and operates in response to a signal from the control device 100 to change or stop the shaft rotation on the output side, i.e., the motor side, of the continuously variable transmission 20, and an input speed change solenoid 110b that changes or stops the rotation on the input side, i.e., the pump side.

[0145] The lower part of the above-mentioned speed change lever 16 does not have any components such as a transmission rod connected to the continuously variable transmission 20, etc., but is attached to the mounting part of the side panel 15 so that it can rotate back and forth, and the part other than the moving groove of the speed change lever 16 formed above this mounting part is configured to be sealed and not connected to the outer periphery of the cabin 5b.

[0146] By using the above configuration, the driving force input to the transmission 21 can be increased or decreased steplessly by increasing or decreasing the rotation speed of the output shaft and the input shaft using the output speed change solenoid 110a and the input speed change solenoid 110b, making it possible to adjust the traveling speed and the reaping, harvesting and transport speed more precisely than with a speed change gear mechanism.

[0147] In addition, since no space is formed connecting the inside and outside of the cabin 5b, it is less susceptible to the effects of outside air, preventing a decrease in air conditioning efficiency, and preventing impurities such as straw chips and dust from entering the cabin 5b and causing discomfort to workers, thereby maintaining the livability of the cabin 5b.

[0148] Furthermore, by stopping the rotation of the input shaft and output shaft of the continuously variable transmission 20 using the input speed change solenoid 110b and the output speed change solenoid 110a, the driving force can be cut off without using a clutch or the like.

[0149] With the above configuration, it is possible to travel at a slower speed than before when traveling over so-called stepping boards, which are often placed in an inclined position when entering or exiting a field or loading and unloading the machine onto a truck bed, etc.

[0150] In addition, the sub-speed change switch 17 is used to switch between neutral, which cuts off the driving force to the traveling gear 2 and stops the vehicle only, working speed, which increases or decreases the vehicle speed within a relatively low speed range suitable for harvesting straw, and travel speed, which increases or decreases the vehicle speed from a low speed to a high speed for travel without working, which was previously performed with the sub-speed change lever.

[0151] The auxiliary speed change switch 17 may be configured to switch between neutral, working speed, and moving speed in sequence each time a single switch is pressed, or may be configured to have three switches and switch between neutral, working speed, and moving speed according to which the switch is operated.

[0152] The operator may manually operate the gear shift lever 16 to adjust this low-speed travel; however, since the output of the continuously variable transmission 20 increases or decreases depending on the slightest difference in the amount of operation of the gear shift lever 16, if the operator accidentally touches the gear shift lever 16 while moving the machine, this could result in an unintentional increase in speed, causing unnecessary psychological stress for the operator, or the machine could be damaged if it falls off the stepping board.

[0153] In addition, the weight of the machine body or ground resistance may reduce the output to a level where the machine body cannot move, or the output may stop. From this state, it may become necessary to finely operate the gear shift lever 16 to increase the output, which requires the operator to perform fine operations.

[0154] The difficulty of performing the above fine-tuning operations varies depending on each individual's sense and level of proficiency in operating the aircraft, so the functions required for safely and steadily entering and exiting fields and loading the cargo bed can actually hinder the ease of operation.

[0155] 23 and 24, a low speed switch 111 is provided on the side panel 15 of the control section 5, which, when operated, activates the input speed change solenoid 110b and the output speed change solenoid 110a via the control device 100, allowing the traveling device 2 to reliably move the vehicle forward even when subjected to the effects of gravity due to ground resistance or inclination, and automatically adjusts the output to a low speed at which the vehicle can travel at an extremely low speed at which minute deviations in the direction of travel can be corrected. The operation control of the input speed change solenoid 110b and the output speed change solenoid 110a when this low speed switch 111 is operated is based on a control program previously recorded in the control device 100, as shown in FIG. 25 etc.

[0156] The low-speed switch 111 is operated when the continuously variable transmission 20 is in a state where it outputs a speed within a range suitable for driving in response to the amount of operation of the speed change lever 16. However, if the output is suddenly reduced at this time, minute vibrations will be generated in the transmission system, causing rattling in the traveling device, and the operator will be shaken, increasing his / her sense of fatigue, and the transmission system will be put under strain, reducing its durability.

[0157] 25, when the low speed switch 111 is operated, the input shift solenoid 110b is first operated in a direction to decrease the speed toward the very low speed setting, thereby decreasing the output on the input side. Then, after a predetermined time has elapsed from the start of operation of the input shift solenoid 110b, the output shift solenoid 110a is operated in a direction to decrease the speed toward the very low speed setting, thereby decreasing the output on the output side.

[0158] When a multi-speed type, for example a two-speed type, is used for the output speed change solenoid 110a, switching to the low speed side for fine adjustment is performed, and when a stepless speed change type is used, the operating speed is controlled via an inverter or the like.

[0159] In the above, the operation of the output shift solenoid 110a is started while the input shift solenoid 110b is operating, but the passage of a certain period of time may be synchronized with the time when the operation of the input shift solenoid 110b is completed, or a control program may be used in which the operation of the output shift solenoid 110a is started after the operation of the input shift solenoid 110b is completed.

[0160] As a result of the above, the shock generated in the transmission system when the continuously variable transmission 20 switches to the very low speed mode can be significantly reduced, preventing vibration from occurring in the machine body and preventing a decrease in operability, load on the transmission system, and fatigue of the operator.

[0161] Furthermore, when the above-mentioned continuously variable transmission 20 is of an infinitely variable transmission type, simultaneous control of the input side and the output side is possible, so even if a control program is used to simultaneously operate the input transmission solenoid 110b and the output transmission solenoid 110a, the occurrence of shocks and the like when the output is reduced can be suppressed.

[0162] During the operation of the extremely low-speed traveling mode, it is considered that the vehicle may move forward or backward for fine adjustment. Also, because there is a risk of sudden acceleration if the extremely low-speed mode is released during extremely low-speed traveling, the gear shift lever 16 is not provided with a function for releasing the extremely low-speed traveling mode in accordance with the operation, such as releasing the extremely low-speed mode when operated to a certain position. In order to improve the convenience of operation, the gear shift lever 16 may be provided with switches that can be operated while being held, but it is preferable not to provide switches related to the operation of the extremely low-speed mode in order to prevent erroneous operation.

[0163] As a result of the above, not only can the very low speed mode be prevented from being unintentionally released, but also the problem of accidentally switching to the very low speed mode during work driving or transportation driving, resulting in extra time being wasted, can be prevented.

[0164] In the above, the very low speed mode cannot be released from the shift lever 16. However, as shown in FIG. 26, when an angle sensor 16S, such as a potentiometer, which detects the amount of operation of the shift lever, determines that the operation position of the shift lever 16 is neutral and a predetermined time (e.g., 30 to 60 seconds) has elapsed while the shift lever 16 remains in the neutral position, the very low speed state is released, and when the shift lever 16 is operated to move forward or reverse, the continuously variable transmission 20 outputs in the working speed mode.

[0165] 23 and 24, in order to prevent erroneous operation, the low-speed switch 111 is disposed inside a recess 112 formed in the side panel 15 of the control unit 5, further rearward than the operating range of the speed change lever 16 and to the side of the mowing / cutting lever 18. The upper end height of this recess 112 is set so that there is no interference even when the speed change lever 16 is operated to its maximum rearward position, and the wall portion facing the operator is cut out or otherwise configured to be lower in height than the front / rear and left / right wall portions on the other sides so that the operator can easily reach out and operate it while seated in the control seat 5a.

[0166] This makes it possible to prevent the low speed switch from being mistakenly operated when operating the speed change lever 16, which is frequently operated during work driving or transportation driving, resulting in the vehicle entering the very low speed mode and wasting extra time.

[0167] In addition, it is not generally operated except when the machine is stopped, and by forming a recess 112 on the side of the mowing / cutting lever 18 and cutting out the wall portion, the operator can easily operate the low-speed switch 111 and can reliably switch the continuously variable transmission 20 to the extremely low-speed mode when necessary.

[0168] The very low speed mode can be released by pressing the low speed switch 111. At this time, as shown in Fig. 26, regardless of the speed setting before the very low speed mode was operated, the input speed change solenoid 110b and the output speed change solenoid 110a operate to provide an output based on the work speed mode, changing the output of the continuously variable transmission 20, and not switching to a travel speed mode capable of higher speed travel.

[0169] As a result, by operating the low speed switch 111, the extremely low speed mode can be switched to the working speed mode, so there is no need to stop traveling when performing the switching operation, and the time required for work can be shortened.

[0170] It is also possible to operate the speed change lever 16 in the very low speed mode to switch the continuously variable transmission 20 to the neutral setting, stop traveling, and then operate the low speed switch 111 to switch to the working speed mode.

[0171] Although measures are taken to prevent erroneous operation of the low-speed switch 111, it is quite possible that an operator will reach for it without looking at the side panel 15, and mistake it for another switch and operate it. If the above-mentioned erroneous operation is performed while moving forward while harvesting stalks, the transportation of the stalks will slow down due to insufficient power, causing a blockage and preventing the harvested stalks from being transported to the threshing device 4, and the traveling speed will slow down, resulting in an increase in working time.

[0172] To prevent this problem from occurring, as shown in Figure 27, when the mowing sensor 18S, which detects the operating position of the mowing lever 18, detects operation to the mowing position, the control device 100 determines that mowing work is in progress and does not issue an activation signal to the input shift solenoid 110b and the output shift solenoid 110a, even if the low speed switch 111 is operated, and does not switch to the extremely low speed mode.

[0173] As a result, even if the low speed switch 111 is operated by mistake, the current output of the continuously variable transmission 20 is maintained, preventing the occurrence of straw clogging and sudden deceleration, thereby improving work efficiency.

[0174] As shown in Figure 28, when the low speed switch 111 has been operated to switch to the very low speed mode and the above-mentioned mowing / threshing sensor 18S detects operation of the mowing / threshing lever 18 to the mowing / threshing position, the traveling speed is maintained at the very low speed and the mode switches to the lodging mode in which the mowing device 3 and the threshing device 4 are driven at high speed. At this time, the control device 100 is configured to operate the mowing / threshing speed-variable motor 114 provided in the transmission 21 to switch the output to the mowing device 3 and the threshing device 4 to increase the operating speed.

[0175] In the lodging mode, the lifting device 80, which moves at a slower speed than during normal harvesting work while rotating at high speed, comes into contact with the fallen stalks, making it easier to harvest the stalks at the base and to place them in a position that makes it easier to clamp and transport them along the transport path to the threshing device 4.

[0176] This prevents the cutting of the tips of the harvested grains, which can lead to a loss of yield and the need for extra labor to collect the tips. It also prevents the culms from being held and transported in an unsuitable position for transportation, preventing work interruptions due to clogging of the culms.

[0177] It is desirable for the traveling speed to be equal to the speed based on the output of the continuously variable transmission 20 set by operating the low speed switch 111, but if sufficient driving force is not ensured for the lifting device 80, which needs to be operated at high speed, the output may be increased so that the vehicle speed is faster in the lodging mode than in the very low speed mode. When using the lodging mode, the field is basically flat, so traveling stability is ensured even if the vehicle speed is not kept as low as in the very low speed mode.

[0178] The above-mentioned mowing / threshing lever 18 can be operated to an off position where power is cut off to the mowing device 3 and the threshing device 4, a threshing position where power is transmitted only to the threshing device 4, and a mowing / threshing position where power is transmitted to the mowing device 3 and the threshing device 4. A mowing / threshing sensor 18S is provided which detects the operating position of this mowing / threshing lever 18, and when the mowing / threshing sensor 18S is in the threshing position and the low speed switch 111 has been operated to select the very low speed mode, the output mode of the continuously variable transmission 20 is switched from the very low speed mode to the mobile speed mode when the low speed switch 111 is operated again.

[0179] In a state where the power is transmitted only to the threshing device 4, the reaping device 3 does not need to move the machine forward to reaper the stalks, so even if the power is high enough to run at high speed in the moving speed mode, the threshing work will only proceed on the spot. Threshing requires many parts that require driving force, such as the rocking of the sorting rack, the blowing of the winnowing machine, and the driving of the feed chain and the threshing drum, and depending on the amount of stalks being supplied and the state of the harvesting work environment, a higher driving force is required. When the power of the continuously variable transmission 20 is limited to a low level, the accuracy of sorting the grains may decrease, or the stalks (discarded straw) may get stuck during transportation after the tips are cut off, which may result in a decrease in the quality of the harvested product or an interruption to the work. However, if the continuously variable transmission 20 can be operated at a high power output, this problem will not occur.

[0180] In addition, when the low speed switch 111 is operated while the extremely low speed mode is selected and the cutting / cutting lever 18 is operated to the cutting / cutting position, it is determined that threshing work will be performed while moving forward and cutting the stalks, and the control device 100 is configured to switch the continuously variable transmission 20 to the working speed mode so that the traveling speed is not too fast for cutting the stalks and would interfere with the cutting.

[0181] As a result of the above, it is possible to prevent the reaping device 3 or the threshing device 4 from entering at one time in an amount of stalks that exceeds their processing capacity, thereby preventing stalks from being left unharvested or from clogging the transport path.

[0182] In addition, by configuring the harvesting clutch 22 and the threshing clutch 23, which turn on and off the transmission of driving force to the harvesting device 3 and the threshing device 4, to be in the on state after the output of the continuously variable transmission 20 switches to the working speed mode, driving force is transmitted to the harvesting device 3 and the threshing device 4 while the output is increasing, and travel begins, preventing work from starting before the conditions are suitable for harvesting, transporting, and threshing the straw.

[0183] This prevents the stalks from clogging and leaving behind stalks.

[0184] Note that the control may be configured such that when the cutting / cutting lever 18 is operated to the cutting position, the continuously variable transmission 20 alternates between the working speed mode and the lowering mode each time the auxiliary speed change switch 17 is operated.

[0185] In addition, the cutting and trimming speed-changing motor 114 may also be operated in conjunction with the operation of the input speed-changing solenoid 110b and the output speed-changing solenoid 110a to switch the transmission system of the lifting device 80 between the high-speed side and the low-speed side. As described above, it is possible to prevent the driving force from being transmitted to the lifting device 80 while the output of the continuously variable transmission 20 is changing.

[0186] As a result, when some of the culms in the field are lying down, the machine can be switched to a state in which the fallen culms can be harvested simply by operating the sub-speed change switch 17, simplifying the operation and improving operability.

[0187] The above control configuration is performed only under conditions where the operation angle of the gear shift lever 16 is not within a predetermined range of a predetermined angle plus or minus, with the neutral position being 0, that is, not within a range where high output occurs. The above conditions also include a state where the gear shift lever 16 is operated to the neutral position.

[0188] When the above-mentioned switching between the working speed mode and the lowering mode is performed by operating the auxiliary speed change switch 17, the monitor 11 displays the current mode to indicate that the switching has been performed successfully. This switching of the display on the monitor 11 is performed at the time when the auxiliary speed change switch 17 is operated, and is performed prior to the completion of switching of the continuously variable speed change device 20 and the switching of the operating speed of the lifting device 80 by the mowing / cutting speed change motor 114.

[0189] This allows the worker to confirm that he or she has operated the low speed switch 111 and the sub-speed switch 17, preventing the worker from interrupting work without realizing that they have not operated the switch properly, and thus preventing the worker from wasting time. In addition, because it becomes easier to notice that an operation error has occurred, the time spent traveling in the extremely low speed mode can be kept short, preventing a decrease in work efficiency. [Explanation of symbols]

[0190] 2 Running gear 3 Reaping device 4. Threshing Equipment 5. Control Unit 5a Cockpit 5b Cabin 15 Side panel (side operation panel) 16 Gear shift lever (gear shift operating member) 16S Angle Sensor 17 Sub-speed change switch (sub-speed changeover member) 18 Mowing / removal lever (mowing / removal switching part) 20 Continuously variable transmission 110a Output shift solenoid (output shift actuator) 110b Input speed change solenoid (input speed change actuator) 111 Slow Switch 112 Recess

Claims

1. A harvester comprising a reaping device (3) provided on a machine body traveling on a traveling device (2), a threshing device (4) for separating grains from stalks harvested by the reaping device (3), a continuously variable transmission (20) for transmitting driving force to the traveling device (2), the reaping device (3) and the threshing device (4), a control section (5) for an operator to ride in, and a cabin (5b) for covering the periphery and upper part of the control section (5), The continuously variable transmission (20) includes an input speed change actuator (110b) that changes and stops the shaft rotation on the input side in a stepless manner, and an output speed change actuator (110a) that changes and stops the shaft rotation on the output side in a stepless manner, The steering section (5) is provided with a speed change operation member (16) for adjusting the amount of operation of the input speed change actuator (110b) and the output speed change actuator (110a) in accordance with detection by an angle sensor (16S); The harvester is characterized in that the speed change operating member (16) is provided in a state in which at least the periphery and the bottom of the lower side are sealed.

2. When the speed change operating member (16) is operated to a position to stop the continuously variable transmission (20), the input speed change actuator (110b) starts an operation to stop the input side shaft rotation, The harvester described in claim 1, characterized in that the control configuration is such that when a predetermined time has elapsed since the stopping operation of the input speed change actuator (110b) was started or when the stopping operation is completed, the output speed change actuator (110a) performs a stopping operation of the output side shaft rotation.

3. The continuously variable transmission (20) is configured to be switchable by an auxiliary transmission switching member (17) into a moving side mode in which the machine can travel at high speed, a working speed mode in which the machine can travel within a speed range suitable for harvesting work, and a neutral mode in which the machine stops traveling; a low speed switch (111) for actuating the input speed change actuator (110b) and the output speed change actuator (110a) when in a travel speed mode or a work speed mode, and switching the continuously variable transmission (20) to an extremely low speed mode suitable for traveling on an incline or the like; The harvester according to claim 1 or 2, characterized in that when the low speed switch (111) is operated while the continuously variable transmission (20) is in an extremely low speed mode, or when the speed change operating member (16) is not operated from a neutral position for a predetermined period of time, the continuously variable transmission (20) is switched to a work speed mode.

4. A mowing / threshing switching member (18) is provided so as to be operable between a mowing / threshing position in which power is transmitted to both the reaping device (3) and the threshing device (4), a threshing position in which power is transmitted to the threshing device (4), and a neutral position in which the transmission is interrupted; The mowing / threshing switching member (18) is configured to be in a mowing / threshing position when operated toward the front of the machine body, in a threshing position when operated toward the rear of the machine body, and in a neutral position when operated to a position intermediate between the mowing / threshing position and the threshing position, When the low speed switch (111) is operated while the mowing / cutting switching member (18) is in the mowing position, the continuously variable transmission (20) is not allowed to switch to the very low speed mode, and The harvester according to claim 3, characterized in that, when the cutting and threshing switching member (18) is operated to the cutting and threshing position while the continuously variable transmission (20) is in the very low speed mode, the control configuration switches to a falling mode suitable for harvesting fallen stalks by increasing the operating speed of the cutting device (3) and the threshing device (4) while maintaining the traveling speed of the very low speed mode.

5. The harvester according to claim 4, characterized in that when the mowing / cutting switching member (18) is operated to a mowing position and the speed change lever (16) is operated to a neutral position, the continuously variable speed change device (20) is configured to alternate between a working speed mode and a lying-down mode.

6. A side operation panel (15) is provided on the side of the operator's seat (5a) of the operation section (5), the side operation panel (15) having the speed change operation member (16), the low speed switch (111) and the mowing / cutting switching member (18), A recess (112) is formed on the side operation panel (15) toward the rear of the aircraft from the rear end of the operation area of ​​the speed change operation member (16), the low speed switch (111) is provided inside the recess (112), and the recess (112) is configured so that the vertical height of the side wall on the cockpit (5a) side is lower than the front / rear and left / right sides, The harvester according to claim 4 or 5, characterized in that the mowing / cutting switching member (18) is provided on the driver's seat (5a) side relative to the recess (112).

Images