KR100506435B1 - Harvester - Google Patents

Abstract

In a harvesting harvester such as a combine, the right and left crawler traveling devices (1, 1) are used for a pair of hydraulic traveling in order to provide an electric structure capable of continuously shifting the mowing part without causing the enlargement of the electric structure. It drives so that it may drive independently by the continuously variable transmission apparatuses 21 and 22, and drives the mowing work part 3 by the hydraulic work continuously variable transmission apparatus 23 provided separately from these traveling continuously variable transmission apparatuses 21 and 22. .

Description

Mowing Harvester {HARVESTER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to harvesting harvesters, such as combines, which combine harvesting work units with the gas traveling by left and right crawler traveling devices, and more particularly, relates to a motorized structure of engine power input to the mission case of such harvesting harvesters.

In recent years, in the harvesting harvester represented by a combine, many hydraulic continuously variable transmissions (HST) which are excellent in operability are used as a peripheral gear for driving, for example, as disclosed in Japanese Patent Laid-Open No. 2002-104229. The CVT driven by the engine is connected to the traveling mission case, the shift output from the continuously variable transmission is branched into the traveling system and the work system in the mission case, and the power of the branched traveling system is geared as a sub transmission mechanism. It is known to be configured to transmit the power of the branched work system via the PTO shaft provided in the mission case to the harvesting work unit after shifting the gears into multiple stages and transmitting the power to the left and right crawler traveling devices.

In addition, a hydraulic continuously variable transmission is used as the peripheral gear for traveling, and a structure configured to independently drive a mowing operation unit in a belt continuously variable transmission linked to an engine is also proposed.

According to the former configuration, since the traveling system and the working system are driven by a common continuously variable transmission, the mowing work unit can be driven at a speed in synchronization with the traveling speed, thus providing the advantage that the standing grain position at the time of mowing is stabilized. . However, if the work is performed while traveling at a low speed, the driving speed of the cutting work section is slowed accordingly, the towing speed of the cutting device is slowed, the cutting performance is lowered, or the pulling speed of the standing device is lowered, resulting in the pulling of grain stems. It was easy to produce defects such as. In addition, when the work travels at the highest speed, the driving speed of the cutting work part is increased accordingly, and the wear of the various working parts of the cutting work part tends to proceed, and the problem that driving noise tends to occur easily occurs.

Further, according to the latter structure, the above-mentioned problem shown in the former structure can be solved because the mowing work unit is driven independently by the belt type continuously variable transmission. However, in this structure, the belt type continuously variable transmission itself becomes large. At the same time, since the belt continuously variable transmission is disposed separately from the traveling system, there is a problem that the transmission structure becomes larger as a whole. In addition, the belt type CVT requires special measures and frequent maintenance for heat generation, belt wear, and the like.

Moreover, there existed the following problems. For example, as disclosed in Japanese Patent Laid-Open No. Hei 11-28944, in large-scale combines, it is practical to independently drive left and right crawler traveling devices with hydraulic continuously variable transmissions.

The drive structure is capable of exhibiting any turning performance by causing a speed difference between the left and right crawler traveling apparatuses, but there is a concern that the straightness may be deteriorated due to the characteristic difference between the pump and the motor in each continuously variable transmission when going straight. there was.

In addition, a straight clutch that can be switched to a lock-up state for integrally connecting both electric systems between the left and right traveling drive systems and a pulley state for completely insulating both electric systems is introduced as a means to solve such a problem. Although it is proposed to switch the straight clutch to the lock-up state and to switch the straight clutch to the pulley state when turning, the electric shock may be generated by suddenly connecting or insulated the left and right driving drive systems each time the straight clutch is turned on and off. There was a problem that became easy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and its main object is to provide a mowing harvester having a transmission structure capable of continuously changing the mowing part and eliminating or alleviating the above problems shown in the conventional structure. There is.

In addition, in such a harvesting harvester, it is also an object to make it possible to carry out a straight run correctly by introducing a straight clutch, and to suppress generation of the fall shock accompanying on-off of a straight clutch.

In order to achieve the above object, the harvesting harvester according to the present invention is a harvesting harvester in which the harvesting operation unit is connected to the gas traveling by the crawler traveling apparatuses on the left and right as described in claim 1, wherein the crawler traveling apparatuses on the left and right are hydraulically driven. In the configuration configured to be driven by the continuously variable transmission for use, the mowing operation portion is configured to be driven by the hydraulic work continuously variable transmission provided separately from the traveling continuously variable transmission.

According to the above configuration, the work unit can be driven separately from the crawler traveling device, so that, for example, the cutting performance is not reduced or the grain extraction by the standing device does not occur when the work travels at an extremely low speed. The mowing section can be driven at speed. In addition, when the work travels in the normal work speed range, the harvesting section can be stabilized at the harvesting time by driving the harvesting section at a speed synchronized with the travel speed. In addition, when the work travels at the highest speed, the mowing part is driven at a lower speed than the speed synchronized with the running speed, thereby suppressing the progress of wear on various moving parts of the mowing part and at the same time preventing driving noise. have.

The hydraulic continuously variable transmission is configured to drive a variable displacement hydraulic pump with engine power to rotate the hydraulic motor at a speed in accordance with the hydraulic oil supply amount from the hydraulic pump, and to extract the shift power from the output shaft of the hydraulic motor. Therefore, the distance between the input shaft (pump shaft) and the output shaft (motor shaft) of the continuously variable transmission includes the belt winding effective diameter of at least one of a drive pulley and an output driven pulley subjected to engine power, and the belt is wound between both pulleys. It becomes smaller than the distance between the shafts of the input / output shaft of the belt type continuously variable transmission configured as described above. In addition, the heat generation in the hydraulic continuously variable transmission can be eliminated by installing the oil cooler in place on the hydraulic circuit, and repair of member wear and the like is almost unnecessary.

Therefore, according to the invention of claim 1, it is possible to drive the harvesting section at an appropriate speed irrespective of the traveling speed, and by making the continuously variable transmission device that independently shifts the harvesting section hydraulically, it is more compact and more durable than the belt type. It can be made excellent in water retention.

Moreover, it is advantageous in the following points that the crawler traveling apparatuses on either side are configured to be driven independently of each other by a pair of continuously variable transmissions.

According to the above configuration, by turning the left and right crawler traveling apparatuses in the same direction and varying the speeds, the gas turns according to the speed difference, or the spin turning and the like is performed by changing the driving directions of the right and left crawler traveling apparatuses. Can be.

Therefore, the gas turning in various forms can be freely performed, which is effective for improving the running performance.

In addition, a mission case for transmitting power to the crawler traveling device is provided, and the driving continuously variable transmission device and the continuously variable transmission device for work are mounted on the mission case, and the engine input to the mission case in the mission case. It is advantageous in the following point if a power is branched and it is comprised so that it may be transmitted to the said traveling continuously variable transmission and a working continuously variable transmission.

According to the above configuration, the mission case functions as a counter case which distributes and transfers the supporting structure and engine power of the mowing-driven continuously variable transmission to both continuously variable transmissions.

Therefore, by effectively utilizing the mission case, the continuously variable transmissions of the traveling system and the work system can be arranged in a compact manner, which is effective for downsizing the drive structure.

The mission case has a first transverse side and a second transverse side opposite to each other, a frame of the mowing work unit is disposed on the first transverse side, and the continuously variable transmission device and the continuously variable transmission device for the work are the second. When arranged on the transverse side, the continuously variable transmission of the traveling system and the continuously variable transmission of the working system are located in a relatively easy to see and easily reachable area without being obstructed to the mowing operation, and thus the maintenance of the continuously variable transmission is performed. It becomes easy.

As another feature configuration, the mowing operation portion is configured to be independently driven from the right and left crawler traveling apparatuses by the work continuously variable transmission, and the drive speed of the mowing operation portion is set even when the driving speed of the crawler traveling apparatus is 0 speed. It is suitable in the following points that it is set to the minimum speed required for the intermittent harvesting work. When set in this way, the drive speed of the harvesting | working part is set to the speed which synchronized with the traveling speed, ie, the minimum speed required for the grain stemming operation | work which is not 0 speed. This speed means the minimum or all of the speeds of the movement of the standing hooks of the plurality of standing devices, the speed of towing of the harvesting device, and the speed of conveying the harvested grain stems by the grain stem conveying device toward the feed chain of the threshing device. This is the speed that can be secured above. Therefore, since the performance of each member can be ensured even at a traveling speed of zero speed, for example, the towing speed of the mowing device is slowed and the mowing performance is lowered, or the standing hook movement speed of the standing device is slowed and the grain stem is pulled out. This problem can be prevented from occurring.

In addition, an upper limit is set with respect to the drive speed of the said harvesting | working part, and it is also suitable to make it speed-up even if the drive speed of the left-right crawler traveling apparatus becomes more than a fixed speed. Such an upper limit setting is advantageous in that it becomes possible to prevent or suppress the occurrence of abrasion at the various operating portions of the mowing work part and the generation of driving noise due to excessive driving speed.

Further, in a lock-up state in which both electric systems are integrally connected between the power electric motors respectively transmitting the engine power branched in the mission case to the left and right crawler traveling devices, and in a pulley state in which both electric motors are completely insulated. It is advantageous in the following points if the friction straight type clutch which can be switched and operated is provided, and the straight clutch is provided with a preload means which enables power transmission at low torque.

According to the above configuration, during the straight running, the straight clutch is turned on, resulting in a lock-up state for integrally connecting the right and left traveling electric motors, and the output rotational speed error of the left and right continuously variable transmission is absorbed, so that the right and left crawler traveling devices are Driven at constant speed. Further, when the turning operation with a difference in the output rotational speeds of the left and right continuously variable transmissions is performed, the straight clutch is turned off, resulting in a pulley state which completely insulates both electric systems. The gas is driven by turning at a speed corresponding to the output rotation speed.

Here, when the straight clutch is switched from the on state to the off state to switch from the straight state to the turning state, and when the turning straight clutch is switched from the off state to the on state to return from the turning state to the straight state, the forced clutch on and Switching of the driving mode is shock-free and smoothly by the state where the clutch off is all released, that is, the straight clutch is triboelectrically driven by low torque by the preload means.

Therefore, the straight running can be accurately performed by the introduction of the straight clutch, and the generation of the electric shock accompanying the on / off of the straight clutch can be suppressed.

For this preloading means, for example, the friction plate of the friction straight clutch can be pressed and configured to be a spring which is carried out while the straight clutch is lightly connected.

Other feature configurations, operations and effects exerted from such feature configurations, and advantages will become apparent by reading the following description with reference to the accompanying drawings.

EMBODIMENT OF THE INVENTION Hereinafter, the coupling | bonding of one suitable embodiment of this invention as an example of a harvesting harvester is demonstrated, referring drawings.

Fig. 1 shows the whole side surface of the self-deleting combine according to the present invention. The basic configuration of this combine is not particularly different from the prior art, and the mowing working part 3 of the multi-cut mowing specification is driven up and down in the front part of the traveling body 2 provided with the left and right crawler traveling devices 1. The control part 6 which mounts and arrange | positions the engine 5 (FIG. 2) under the driving seat 4 is provided in the front part right side of the traveling body 2 at the same time as possible. Moreover, the threshing apparatus 7 is mounted in the upper left side of the traveling body 2, and the grain recovery tank 9 provided with the screw-type unloader (unloader) 8 on the right side is arrange | positioned. It is.

The mowing work unit 3 includes a plurality of standing devices 11 and a mowing device 12 in a mowing work frame 10 supported on the front part of the traveling body 2 so as to be able to swing up and down around the support point X. And the grain stem conveying apparatus 14 which conveys the harvesting grain stem toward the feed chain 13 of the threshing apparatus 7, and the whole harvesting work part 3 is driven up and down by the hydraulic cylinder 15, have.

A characteristic configuration of the present invention resides in the transmission structure to the crawler traveling device 1 and the mowing work unit 3. In the following, the engine power input to the mission case 20 is branched in the mission case 20, and each power after the branching is carried out to the continuously variable transmission apparatuses 21 and 22 for driving and the continuously variable transmission 23 for work. The structure or configuration to be delivered is described in detail in detail.

FIG. 2 is a schematic configuration view of the transmission structure viewed from the front of the body, and FIG. 3 is a longitudinal front view of the mission case 20. In these drawings, a pair of hydraulics which independently drive the left and right crawler traveling apparatuses 1 on one side surface of the mission case 20 (corresponding to the right side surface of the gas, corresponding to the second side surface of the gas body). Equipped with a continuously variable transmission (an example of a continuously variable transmission for HST.) (21, 22) and a hydraulic continuously variable transmission (an example of an HST. have. The side of the other side of the mission case 20 (the side of the gas is the left side of the side, and the side on which the cutting work frame 10 shown in FIG. 1 is located. Corresponding to the first horizontal side surface], the input shaft 24 protrudes, and the input shaft 24 and the engine 5 are belt-linked.

4 is a longitudinal sectional front view of the periphery of the straight clutch 50 mentioned later in the mission case 20, and FIG. 5 is a side view of the arrangement of each axis in the mission case 20 as seen from the left side of the body.

2 to 5, each of the continuously variable transmissions 21, 22, and 23 is an axial plunger type variable displacement type, which is integrally protruded from the right side wall of the mission case 20. Assemble the pumps P (1), P (2), P (3) and the fixed-capacity motors M (1), M (2), M (3), and at the same time, port blocks 21c, 22c, 23c for hydraulic control. Is attached to the outer end of the case. Power from the engine 5 entering the input shaft 24 is transmitted from the counter gear G1 to the pump shafts 21a and 22a of the continuously variable transmissions 21 and 22 of the traveling system via the gears G2 and G3. At the same time, the gear G4 is transmitted to the pump shaft 23a of the continuously variable transmission 23 of the work system. Then, each motor shaft 21b is operated by changing the swash plate angles of the variable displacement pumps P (1), P (2), and P (3) independently to change the discharge direction and discharge amount of the hydraulic oil. , 22b, 23b), the forward and reverse switching in the rotational direction and the stepless speed change from the zero speed can be performed. That is, the crawler traveling apparatus 1 on the left side, the crawler traveling apparatus 1 on the right side, and the mowing work part 3 are comprised so that driving is independent of each other.

Then, the shift output from the motor shaft 21b of the continuously variable transmission 21 is transmitted to the first intermediate shaft (left) 26 via the gear-type sub transmission mechanism (left) 25, and then the second It is transmitted to the axle (left) 29 via the gear reduction mechanism 28 loosely fitted to the intermediate shaft 27, and the crawler traveling apparatus 1 on the left side is driven. In addition, after the transmission output from the motor shaft 22b of the continuously variable transmission 22 is transmitted to the 1st intermediate | middle shaft (right side) 31 via the gear-type sub transmission mechanism (right side) 30, a 2nd The crawler traveling device 1 on the right side is transmitted to the axle (right side) 33 via a gear reduction mechanism 32 that is loosely fitted to the intermediate shaft 27.

The sub transmission mechanism (left side) 25 is loosely fitted to the large and small gears G5 and G6 and the first intermediate shaft (left side) 26 driven by the motor shaft 21b and the gears G5 and G6. Electric boss 35 and electric boss 35 that are splined to the first intermediate shaft (left) 26 between a pair of gears G7 and G8 and both gears G7 and G8 engaged with each other. It is equipped with the shift sleeve 36 fitted in the outer spline, and it is comprised so that shifting to two stages in the constant mesh form is possible. In this structure, "low speed" is obtained by shifting the shift sleeve 36 so as to mesh over the boss of the electric boss 35 and the gear G8, and shifts the shift sleeve 36 to the electric boss 35 and the gear ( By shifting so as to engage over the boss of G7), " high speed " is obtained, and when the shift sleeve 36 is placed on the electric boss 35 and the engagement with the bosses of both gears G7 and G8 is released, Neutrality ".

The sub transmission mechanism (right side) 30 is also configured with the same specifications as the sub transmission mechanism (left side) 25, and is equipped with large and small gears G9 and G10 and a first intermediate shaft driven by the motor shaft 22b. The first intermediate shaft (right) 31 between the pair of gears G11 and G12 and both gears G11 and G12 that are loosely fitted to the right side 31 and engaged with the gears G9 and G10. ) And a shift sleeve 38 splined outside of the electric boss 37 splined to the electric boss 37 and the shift sleeve 38 over the boss of the electric boss 37 and the gear G12. "Slow speed" can be obtained by shifting to engage, and "High speed" can be obtained by shifting the shift sleeve 38 to engage across the boss of the electric boss 37 and the gear G11, and the shift sleeve 38 Is placed on the electric boss 37 to release the engagement of the bosses of both gears G11 and G12, which may result in "neutrality." It is registered.

As shown in Fig. 4, the pair of shift forks 40 and 41 coupled to the shift sleeves 36 and 38 of the two sub transmission mechanisms 25 and 30 are movable left and right in the mission case 20. In addition to being connected to the supported common shift shaft 42, the shift shaft 42 is configured to be drive shifted by the shift operation cylinder 43 assembled to the mission case 20, and the shift shaft 42 is By selectively shifting to the third position by the shift operation cylinder 43, both of the sub transmission mechanisms 25 and 30 are switched to "low speed" for work travel, "high speed" or "neutral" for travel travel. .

In addition, as shown in Fig. 4, the shift amounts s1 and s2 when the respective shift sleeves 36 and 38 of the two sub transmission mechanisms 25 and 30 are switched from "low speed" to "high speed" and " The shift amount (not shown) at the time of switching from "high speed" to "low speed" is slightly different, and it is set so that the shift timings of both sub transmission mechanisms 25 and 30 may differ. According to this, it becomes possible to smoothly shift the left and right traveling drive systems by avoiding the switching operation defect caused by the shift of the engagement phase in both the sub transmission mechanisms 25 and 30 in advance.

A piston rod 44 connected to the shift shaft 42 and a ring-shaped piston 45 externally fitted thereto are assembled in the shift operation cylinder 43. The piston rod is controlled at high speed and low speed by controlling the oil supply pattern. And "neutral" can be moved in and out of three positions.

That is, as shown in FIG. 7, the shift operation cylinder 43 is connected to the pair of electromagnetically driven on-off valves 46 and 47, and as shown in FIG. When both the off valves 46 and 47 are not energized, both on-off valves 46 and 47 are opened, and pressure is applied to the two hydraulic oil ports a and b of the shift operation cylinder 43, The piston rod 44 is retracted in the left direction in the drawing by the pressure from the oil pressure port a, and the ring-shaped piston 45 is moved to the limit in the right direction in the drawing by the pressure from the pressure oil port b. The piston rod 44 is held in the neutral position which is regulated by the ring-shaped piston 45 by the difference in the hydraulic pressure area. In addition, as shown in Fig. 7B, when only one on-off valve 47 is energized, the piston rod 44 and the ring-shaped piston 45 are driven by the pressure range from the oil pressure port b. It moves to the limit of the right direction in a figure, and the piston rod 44 advances | moves to the "low speed" for work travel. As shown in Fig. 7C, when only one on-off valve 46 is energized, the piston rod 44 and the ring-shaped piston 45 are driven by the pressure from the oil pressure port a. It moves to the limit of the left direction in the figure, and the piston rod 44 moves in and out to the "high speed" for movement travel.

In addition, while the first intermediate shaft (left) 26 is supported over the left and right side walls of the mission case 20, the first intermediate shaft (right) 31 is connected to the first intermediate shaft (left) 26. A multi-plate straight clutch 50 that is loosely fitted and supported and that is hydraulically operated is interposed between the first intermediate shaft (left) 26 and the first intermediate shaft (right) 31. This straight clutch 50 is clutched on when the left continuously variable transmission 21 and the right traveling continuously variable transmission 22 are equally operated in the same direction, that is, in the straight operation state, thereby operating the first intermediate shaft. (Left) 26 and the 1st intermediate shaft (right) 31 are integrated, and even if there are some differences in the output rotation speeds of both the continuously variable transmissions 21 and 22, the axle (left) 29 and the axle ( The right side 33 is driven at the same speed, which leads to a surely straight state. In addition, when the operation of the left handless continuously variable transmission 21 and the right handless continuously variable transmission 22 are not the same, that is, in a state where the steering operation of the body is being performed, the steering clutch 50 is operated to be turned off. In conjunction with the operation, the straight clutch 50 is controlled to operate.

As shown in Fig. 4, the straight clutch 50 is fixedly attached to the end of the large-diameter drum 51 fixedly attached to the first intermediate shaft (left) 26 and the first intermediate shaft (right) 31. A piston plate 54 assembled between the first intermediate shaft (left) 26 and the large-diameter drum 51 is provided between the small-diameter drums 52 and the small-diameter drums 52 are interposed therebetween. The rotary joint 55 is configured to perform clutch on-off by actuating longitudinally or vice versa by the pressure oil supplied from d), and the clutch-on operation flow path c and the clutch-off operation flow path d mounted to the shaft end. Is connected to the electronic on / off valves 56 and 57 (see Fig. 7).

In addition, an internally expandable brake 58 is mounted at the end of the first intermediate shaft 26 (left), and the straight clutch 50 has a ring-shaped spring for pressing the piston member 54 in the clutch-on direction. 59) (an example of the preloading means) are assembled in a plural number. In the state where no pressure is generated in any of the flow paths c and d, the friction plate 53 is elastically pressed by the spring 59 so that the straight clutch 50 is lightly connected.

Therefore, when switching from the straight state to the turning state, or when returning from the turning state to the straight state, the pressure is not generated in both flow paths c and d for a very short time. ) Is lightly connected via the straight clutch 50, and the shock at the start of turning and the occurrence of shock when returning from the turning to the straight are suppressed.

When the gas is parked, the engine 5 is stopped and the brake 58 is applied. However, since the pressure is not generated in the flow paths c and d in the state where the engine 5 is stopped, the piston member 54 The clutch 50 is free and the clutch 50 is in a clutch off state, and the brake 58 acts only on the first intermediate shaft (left) 26 and brakes only to the crawler traveling device 1 on the left side. Since the first intermediate shaft (left) 26 and the first intermediate shaft (right) 31 are in an appropriate friction transmission state via the spring 59 as described above, the first intermediate shaft (left) 26 acts on the first intermediate shaft (left) 26. The braking action also extends to the first intermediate shaft (right) 31 to some extent, and even when the vehicle is parked on a slope, the crawler traveling device 1 on the right side becomes free and the aircraft is easily steered by its own weight. It is supposed to be.

2 and 3, the shift output from the motor shaft 23b of the continuously variable transmission device 23 of the work system is provided with a work output shaft (PTO shaft) protruding from the left side surface of the mission case 20. 60 is transmitted via gears G12 and G13, and the belt is transmitted to the mowing work unit 3 via a tension mowing clutch (not shown). Here, as shown in Fig. 5, the continuously variable transmission apparatuses 21 and 22 of the traveling system are arranged in parallel back and forth in the longitudinal posture in which the pump shafts 21a and 22a and the motor shafts 21b and 22b are arranged vertically. On the other hand, the continuously variable transmission device 23 of the working system has a horizontal side in which the pump shaft 23a and the motor shaft 23b are substantially horizontal in the front and rear direction (in this example, the motor shaft 23b is slightly upward). The whole mission case 20 arrange | positioned in the directional attitude | position and attaching these three continuously variable transmission apparatuses 21, 22, and 23 is arrange | positioned low vertically. As a result, the height of the whole mission case 20 can be suppressed, and a clearance is formed in the space above the mission case 20, and the upper part of the mission case 20 is attached to the control part 6 located above it. Interference or the upper part of the mission case 20 interfere with the harvesting grain culm conveyance path in the harvesting | reaping work part 3 with a margin, and is avoided.

6 shows a hydraulic circuit relating to the continuously variable transmissions 21, 22, and 23. As shown in FIG. The variable displacement pumps P (1) and P (2) of the continuously variable transmission apparatuses 21 and 22 of the traveling system are shifted by the servo cylinders 63 and 64 which are operated and controlled by the servo valves 61 and 62. It is. Here, both servo valves 61 and 62 are connected to a single forward and backward swingable main lever lever 65 (FIG. 1) and a left and right swingable steering lever 66 (FIG. 1) provided in the control unit 6. Mechanically linked, the variable displacement pumps P (1) and P (2) of both the continuously variable transmissions 21 and 22 are operated by the same amount on the forward side by operating the main gear lever 65 from the neutral forward. By operating the main gear lever 65 from the neutral to the rear, both the variable displacement pumps P (1) and P (2) of both the continuously variable transmissions 21 and 22 are operated in the same amount to the reverse side so that forward and backward shifts in the straight line can be performed. I can do it. In addition, as the steering lever 66 is operated from neutral to the left side, the left-side continuously variable transmission 21 is operated in the deceleration direction, and as the right-side continuously variable transmission 22 is operated in the deceleration direction as the steering lever 66 is operated from neutral to the right. And the body is linked so as to turn by the turning function of the strength according to the lever operation amount in the operated direction of the steering lever 66.

For example, if the steering lever 66 is operated to the left in a state in which the forward speed is set to the speed set by the main gear lever 65, one continuously variable transmission 21 is decelerated and the crawler traveling device on the left side is decelerated. The forward speed of (1) is delayed, and the gas turns to the left by the left and right speed differences. And when the steering lever 66 is largely operated to the left side, the one endless speed change apparatus 21 which slows down will reach neutrality, and the pivot turning apparatus 1 of the crawler traveling apparatus 1 of the left side which will turn inside will stop ( pivot turns). Further, when the steering lever 66 is operated to the left side largely, the one endless transmission 21 shifts beyond neutral and back to the reverse side, and the outside of the turning the crawler traveling device 1 on the left side becomes the turning inside. The spin turn reversed with respect to the rotation direction of the crawler on the right side is performed.

As shown in FIG. 8, the variable displacement pump P3 of the continuously variable transmission 23 which drives the mowing work part 3 is operated by actuator 71, such as an electric motor. The operation position of the main gear lever 65 is detected by the potentiometer 72.

Based on this detection result, the relationship between the traveling speed and the mowing part drive speed is set so as to be the characteristics shown in FIG. 9, for example, and the stepless operation of the work system in conjunction with the forward shift operation of the main gear lever 65 The speed shift device 23 is configured to automatically shift.

First, for example, even when the driving speed of the left and right crawler traveling apparatuses 1 and 1 is 0 speed, the driving speed of the cutting work part 3 is set to the speed in synchronization with the traveling speed, that is, 0 speed. Is set to the minimum speed required. These speeds convey the standing hook moving speeds of the plurality of standing devices 11, the towing speed of the harvesting device 12, and the harvesting grain stems by the grain stem conveying device 14 toward the feed chain 13 of the threshing device 7. All the speeds can be secured to the minimum or more, and therefore, the speed is enough to ensure the performance of each of them. This prevents drawbacks such as slowing the towing speed of the mowing device, lowering the mowing performance, or slowing the standing hook moving speed of the standing device, resulting in the extraction of grain stems.

Moreover, an upper limit is set to the drive speed of the mowing work part 3, and speed-up is suppressed even if the drive speed of the crawler traveling apparatuses 1 and 1 of right and left becomes more than a fixed speed. This upper limit is set to be effective in suppressing the wear of various working parts of a mowing operation part and generation of drive noise, depending on the model.

In addition, about the characteristic between the lower limit drive speed and the upper limit drive speed of the harvesting | reaping work part 3, it is thought that the convex up as shown in FIG. 9 is suitable for smoothing of mowing operation. However, the characteristic shown is an example to the last, and it may be a direct proportion instead, or it may be variously set according to the control apparatus (FIG. 8), such as making it convex downward as opposed to FIG.

In addition, as shown in FIG. 8, when the pedal 73 for depression action is provided in the foot of the control part 6, and it is detected by the switch 74 that this pedal 73 is depressed, when it switches to a running speed, Regardless, the actuator 71 is controlled to drive the mowing work unit 3 at a predetermined constant speed. According to this, even if the driving of the main gear lever 65 is stopped near the rice paddy or the vehicle is stopped or moved backward, the mowing work part 3 can be driven at a constant speed by the depression of the pedal 73, and the mowed grain stem is shed. You can return without work.

As shown in Fig. 6, the charge pressure oil is applied to the charge circuits e and f of the two continuously variable transmissions 21 and 22 in the pump shaft 22a of the continuously variable transmission 22 of the traveling system. The charge pump CP 1 to be supplied is mounted, and the charge pressure oil is supplied only to the charge circuit g of the continuously variable transmission 23 to the pump shaft 23a of the continuously variable transmission device 23 of the work system. The pump CP 2 is attached. Here, the hydraulic oil from the charge pump CP 1 is supplied to the hydraulic circuit for shifting the continuously variable transmission apparatuses 21 and 22 of the traveling system, that is, the hydraulic servo system under load, and thus the charge pump CP ( 1) the discharge amount is larger than that of the charge pump CP 2, and the pressure of the charge circuits e and f of the traveling system is increased by the charge relief valves CR (1) and CR (2). It is set to be higher than the pressure of.

Moreover, the casing of the continuously variable transmission apparatuses 21 and 22 of the traveling system is connected to the in-case piping h, and the drain oil from the continuously variable transmission apparatus 21 of the left traveling system passes through the piping inside the case h. After flowing into the casing of the continuously variable transmission 22 of the right traveling system, it is taken out through the external drain pipe i and is recovered to the dedicated hydraulic oil tank T via the oil cooler OC. Further, the drain oil of the continuously variable transmission device 23 of the working system is also recovered to the hydraulic oil tank T via the external drain pipe j and the oil cooler OC.

[Other Embodiments]

Embodiment described above is an example to the last, and this invention can also be implemented with the following forms.

(1) The structure can be simplified by integrating the port blocks 21c and 22c of the continuously variable transmission devices 21 and 22 of the traveling system. Moreover, it is also possible to integrate all the port blocks 21c, 22c, and 23c of the continuously variable transmission apparatuses 21, 22, and 23 of a traveling system and a work system.

(2) The continuously variable transmission device 23 responsible for driving the mowing work unit 3 may be configured to be operated even in the reverse reverse speed range. According to this, when a blockage arises in the harvesting grain stem conveyance path | route, a conveyance apparatus is reversed to a slow speed, and the grain stem which was eaten badly can be reversely conveyed, and the blockage release operation can be made easy.

(3) The position of the shift shaft 42 for operating the two sub transmission mechanisms 25 and 30 or the position of the piston rod 44 of the shift operation cylinder 43 may be detected by a switch or the like. In such a configuration, the detection result can be displayed by an indicator and used for recognition of shift control.

(4) The shift shaft 42 for operating the two sub transmission mechanisms 25 and 30 may be mechanically linked to the sub transmission lever in such a manner as to shift with an artificial operating force.

According to the present invention, it is possible to freely turn the gas in various forms, which is effective for improving the running performance.

Further, by effectively utilizing the mission case, the continuously variable transmissions of the traveling system and the working system can be arranged in a compact manner, which is effective for downsizing the drive structure.

In addition, the continuously variable transmission of the traveling system and the continuously variable transmission of the working system are relatively easy to see without being obstructed to the mowing work section, and are located at a place where the hand can be easily reached, thereby facilitating maintenance of the continuously variable transmission.

In addition, problems such as lowering of the cutting performance of the cutting device due to the slowing down of the cutting device or the slowing of the moving speed of the standing hooks of the standing device, such as pulling out of the grain stem, are prevented.

Moreover, it becomes advantageous at the point which becomes possible to prevent or suppress generation | occurrence | production of the abrasion in the various operation parts of the mowing work part due to excess drive speed, and generation of drive noise.

In addition, the straight traveling can be accurately performed by the introduction of the straight clutch, and the generation of the electric shock accompanying the on / off of the straight clutch can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall side view of a jahalal combine as an example of a harvester harvesting machine according to an embodiment of the present invention seen from the left side of the body;

2 is a front view showing a schematic configuration of a transmission structure;

3 is a longitudinal front view of the mission case;

4 is a longitudinal front view of a straight clutch periphery;

5 is a side view of the shaft arrangement of the mission case as seen from the left side of the body;

6 is a hydraulic circuit diagram.

Fig. 7 is a hydraulic circuit diagram for the sub transmission mechanism and the straight clutch operation.

8 is a block diagram showing an operation structure of the work system continuously variable transmission.

9 is a characteristic diagram showing the relationship between the traveling speed and the mowing part drive speed.

10 is a front view of the traveling device unit.

<Description of the symbols for the main parts of the drawings>

1: crawler traveling device

3: mowing work unit

10: frame of mowing work

20: mission case

21, 22: continuously variable transmission for driving

23: continuously variable transmission for work

25, 30: sub transmission mechanism

50: straight clutch

58: brake

Claims (16)

delete delete delete delete It is a harvesting harvester which connected the mowing work part 3 to the machine which travels by the crawler traveling apparatuses 1 and 1 of right and left, In the crawler traveling apparatuses 1 and 1 on the left and right sides configured to be driven by the hydraulic continuously variable transmission apparatuses 21 and 22, The mowing work unit 3 is configured to be driven independently from the left and right crawler traveling devices 1 and 1 by a hydraulic work continuously variable transmission 23 provided separately from the traveling continuously variable transmission. The harvesting harvester characterized in that when the drive speed of the said crawler traveling apparatus (1, 1) is 0 speed, the drive speed of the said harvesting | working part (3) is set to the minimum speed required for a grain stemming work. The speed increase of the mowing work part 3 according to claim 5, wherein an upper limit is set on the driving speed of the mowing work part 3 so that the driving speeds of the crawler traveling apparatuses 1 and 1 on the left and right become more than a certain speed. Mowing harvester, characterized in that is suppressed. delete delete It is a harvesting harvester which connected the mowing work part 3 to the machine which travels by the crawler traveling apparatuses 1 and 1 of right and left, In the crawler traveling apparatuses 1 and 1 on the left and right sides configured to be driven by the hydraulic continuously variable transmission apparatuses 21 and 22, The mowing work unit 3 is configured to be driven independently from the left and right crawler traveling devices 1 and 1 by a hydraulic work continuously variable transmission 23 provided separately from the traveling continuously variable transmission. The upper limit is set to the drive speed of the mowing work unit 3, and the increase of the mowing work part 3 is suppressed even if the driving speeds of the crawler traveling apparatuses 1 and 1 on the left and right become more than a certain speed. Mowing Harvester. It is a harvesting harvester which connected the mowing work part 3 to the machine which travels by the crawler traveling apparatuses 1 and 1 of right and left, In the crawler traveling apparatuses 1 and 1 on the left and right sides configured to be driven by the hydraulic continuously variable transmission apparatuses 21 and 22, The mowing work unit 3 is configured to be driven independently from the left and right crawler traveling devices 1 and 1 by a hydraulic work continuously variable transmission 23 provided separately from the traveling continuously variable transmission. The lower limit is set in the drive speed of the said mowing work part 3, and the deceleration of this mowing work part 3 is suppressed even if the drive speed of the crawler traveling apparatuses 1 and 1 on either side is below a fixed speed. Mowing Harvester. It is a harvesting harvester which connected the mowing work part 3 to the machine which travels by the crawler traveling apparatuses 1 and 1 of right and left, In the crawler traveling apparatuses 1 and 1 on the left and right sides configured to be driven by the hydraulic continuously variable transmission apparatuses 21 and 22, The mowing work unit 3 is configured to be driven independently from the left and right crawler traveling devices 1 and 1 by a hydraulic work continuously variable transmission 23 provided separately from the traveling continuously variable transmission. A harvesting harvester, characterized in that a lower limit is set on the drive speed of the harvesting work part (3) and the driving speed of the harvesting work part (3) is set to the minimum speed necessary for the grain stemming work. 12. The crawler traveling apparatuses 1 and 1 according to any one of claims 5 and 9 to 11 are each independently driven by a pair of continuously variable transmissions 21 and 22, respectively. Mowing harvester, characterized in that is configured. The mission case 20 according to any one of claims 5 and 9 to 11, which further transmits power to the crawler traveling apparatuses 1 and 1, is further provided. The mission casing 20 is equipped with the continuously variable transmissions 21 and 22 and the continuously variable transmission 23 for work. Mowing harvester, characterized in that the engine power input to the mission case in the mission case 20 is branched to be transmitted to the traveling continuously variable transmission (21, 22) and work continuously variable transmission (23). . The method according to claim 13, wherein the mission case 20 has a first transverse side and a second transverse side on opposite sides, The frame 10 of the mowing work part 3 is arranged on the first lateral side, and the continuously variable transmission apparatuses 21 and 22 for work and the continuously variable transmission apparatus 23 for work are arranged on the second horizontal side surface. Mowing harvester, characterized in that. The lock-up state according to claim 13, wherein the electric motors are integrally connected between the power electric motors respectively transmitting the engine power branched in the mission case 20 to the right and left crawler traveling devices 1 and 1, respectively. And a frictional straight clutch 50 that can be switched in a pulley state that completely insulates both electric systems. A harvesting harvester, characterized in that the straight clutch (50) is provided with a preloading means (59) for enabling power transmission at low torque. The method of claim 15, wherein the preload means is made of a spring (59) for pressing the friction plate (53) of the friction-type straight clutch (50) to lightly connect the straight clutch (50). Mowing Harvester.