Steering device of combine harvester

Abstract

To enable grain culm clogging removal work for a reaping conveyance device during harvesting work by a combine harvester to be safely performed.SOLUTION: A steering device of a combine harvester is provided with a parking pedal 25 which stops the travel of a traveling device 8 when being depressed by a worker but continues the drive of a reaping conveyance device 5, and a foot contact sensor 26 which detects the fact that the worker puts his / her foot on the parking pedal 25, and is configured to disconnect the power transmission to the reaping conveyance device 5 when the worker releases his / her foot from the parking pedal 25 and the foot contact sensor 26 is turned off, in the combine harvester which drives the reaping conveyance device 5 provided in a front part of a traveling undercarriage 2, reaps grain culms, and sends them to a thresher 6.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a combine harvester that cuts cereal culms growing in a field to harvest grains. [Background technology]

[0002] As described in Patent No. 4710466 (Patent Document 1), a combine harvester uses a harvesting and transporting device attached to the front of the machine to harvest grain stalks growing in a field and transport them to a threshing device, into which the tips of the stalks are inserted to thresh and sort the grains, and the grains are stored in a grain tank for harvesting. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4710466 Summary of the Invention [Problem to be solved by the invention]

[0004] A combine harvester cuts the base of culms with the harvesting and conveying device at the front of the machine while moving forward, so in order to cut culms growing on the edge of the bank, the front end of the harvesting and conveying device must be brought close to the edge of the bank so that all of the culms growing on the edge of the bank can be cut, but this operation is performed by stopping the vehicle while keeping the harvesting and conveying device in operation. If a culm becomes stuck in the harvesting and conveying device during this operation and the harvesting operation is interrupted, the operator of the combine harvester will get off the driver's seat and try to remove the culm stuck in the harvesting and conveying device, but because power is still being transmitted to the harvesting and conveying device, the harvesting and conveying device will start operating as soon as the stuck culm is removed, which can be dangerous.

[0005] An object of the present invention is to enable the safe removal of jammed grain stalks from a harvesting and conveying device during harvesting operations using a combine harvester. [Means for solving the problem]

[0006] The above object of the present invention can be achieved by the following technical means.

[0007] The invention of claim 1 relates to a combine harvester that drives a harvesting and transporting device 5 mounted on the front of a running chassis 2 to harvest stalks and send them to a thresher 6, and is characterized in that a parking pedal 25 is provided which, when stepped on by an operator, stops the running mechanism 8 but continues to drive the harvesting and transporting device 5, and a foot contact sensor 26 is provided which detects whether the operator has his / her foot on the parking pedal 25, and when the operator takes his / her foot off the parking pedal 25 and the foot contact sensor 26 turns off, power transmission to the harvesting and transporting device 5 is cut off.

[0008] The invention of claim 2 relates to a steering device for a combine as described in claim 1, characterized in that a grip sensor 34 is provided in the grip portion of the main shift lever 22 which changes the speed of the traveling device 8, and when the grip sensor 34 detects that the operator is gripping the lever, power transmission to the harvesting and transporting device 5 continues even if the foot contact sensor 26 is turned off after depressing the parking pedal 25.

[0009] The invention of claim 3 relates to a combine steering device as described in claim 1, characterized in that a depression pressure adjuster 33 is provided on the parking pedal 25, and the traveling device 8 is stopped by lightly depressing the parking pedal 25 to a predetermined extent.

[0010] The invention of claim 4 provides a steering device for a combine harvester according to claim 3, in which the tread pressure adjusting device 33 is provided so as to be adjustable from the side of the step floor 30.

[0011] The invention of claim 5 is a steering device for a combine as described in claim 1, characterized in that drive to the harvesting and conveying device 5 continues for a very short time after the foot contact sensor 26 is turned off, and drive to the traveling device 8 is resumed if the main shift lever 22 is operated during that time.

[0012] The invention of claim 6 provides a steering device for a combine harvester as described in claim 1, characterized in that when the parking pedal 25 is released and the main shift lever 22 is returned to neutral, the shifting function of the main shift lever 22 is restored. Effect of the Invention

[0013] In the invention of claim 1, the operator who rides on the combine harvester drives the traveling device 8 while driving the reaping and conveying device 5 to perform harvesting work while moving forward, but by driving forward to the edge of the levee and stepping on the parking pedal 25 just before the reaping and conveying device 5 hits the levee, the forward movement of the traveling device 8 stops while the reaping and conveying device 5 remains driven, and since the reaping and conveying device 5 remains driven, the culms growing at the edge of the levee can be harvested. If the culms get tangled in the reaping and conveying device 5 during this operation and the reaping and conveying device stops, the operator will take his foot off the parking pedal 25 and get off the traveling vehicle 2 to remove the culms tangled in the reaping and conveying device 5, but at this time, when the foot contact sensor 26 turns off, power transmission to the reaping and conveying device 5 is cut off, so even if the clogged culms are removed, the reaping and conveying device 5 will not suddenly start to move, and there is no danger to the operator.

[0014] In the invention of claim 2, when the operator finishes mowing the edge of the bank and turns or retreats, he / she grips the main speed change lever 22 and the grip sensor 33 turns on, which drives the mowing and transporting device 5. Therefore, if the operator continues to grip the main speed change lever 22, even if the foot contact sensor 26 turns off, the stalks that have been mowed and are being transported are reliably transported to the thresher 6 without falling off, and no stalks fall off.

[0015] In the invention of claim 3, the worker who is harvesting the stalks on the edge of the bank can easily make delicate adjustments to the harvesting on the edge of the bank by lightly stepping on the parking pedal 25 in accordance with his / her physical strength, and the traveling device 8 immediately stops.

[0016] According to the invention of claim 4, the adjustment of the tread pressure adjusting device 33 can be simply and easily performed from the side of the step floor 30.

[0017] In the invention of claim 5, for a very short time while the worker gets off the running chassis 2, the harvesting and conveying device 5 continues to operate and sends the harvested stalks to the thresher 6, and after a very short time has passed, the stalks are removed and the main shift lever 22 can be immediately operated to start the next harvesting run.

[0018] According to the invention of claim 6, when the main speed change lever 22 is returned to neutral after the mowing of the edge of the bank is completed, the traveling device 8 is immediately driven to start the next mowing trip. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a left side view of a combine harvester according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of the transmission mechanism of the combine harvester. [Diagram 3] FIG. 2 is a mechanism diagram of a hydraulic continuously variable transmission. [Figure 4] FIG. [Diagram 5] FIG. 4 is an explanatory diagram of the mechanism of the main shift lever and the brake pedal. [Figure 6] FIG. [Figure 7] FIG. 4 is an enlarged side view of the main shift lever. [Figure 8] FIG. 13 is a control diagram of the vehicle speed and the rotation speed of the feed chain and the harvesting and conveying device. [Figure 9] FIG. 4 is a side view showing the installation of the parking pedal. [Figure 10] FIG. 2 is a block diagram of automatic control. [Figure 11] FIG. 1 is a flowchart showing automatic control when the parking pedal is depressed. [Figure 12] FIG. 2 is a flowchart showing automatic control when the parking pedal is depressed. [Figure 13] FIG. 3 is a flowchart showing automatic control when the parking pedal is depressed. [Figure 14] FIG. 4 is a flowchart showing automatic control of the parking pedal and the main shift lever. [Figure 15] FIG. [Figure 16] FIG. [Figure 17] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0021] 1 is a side view of a combine harvester 1, which is provided with a transmission case 3 for traveling at the front end of a traveling chassis 2, a reaping and conveying device 5 for conveying stalks upward after harvesting them at the front, and a thresher 6 for receiving the stalks and sending them backwards while threshing them on the upper side. A hydraulic continuously variable transmission 4 is provided on the transmission case 3, and a main speed change lever 22 for changing the speed is provided on an operating device 12b for controlling the traveling. The speed at which the stalks are conveyed between the reaping and conveying device 5 and the feed chain 9a of the thresher 6 is changed in response to the operation of the main speed change lever 22. When the parking brake device 3e of the transmission case 3 is operated, the power transmission from the hydraulic continuously variable transmission 4 between the traveling axles 14 on both the left and right sides of the transmission case 3 is interrupted, and with the parking brake device 3e locked, the reaping and conveying device 5 and the feed chain 9a of the thresher 6 are rotated by operating the main speed change lever 22 to forward travel, and the parking brake device 3e can be unlocked by operating the main speed change lever 22 to the neutral position. The transmission case 3, the reaping and conveying device 5, the feed chain 9a of the thresher 6, the hydraulic continuously variable transmission 4, the main speed change lever 22, etc. will be explained using the power transmission diagram of Figure 2.

[0022] A traveling device 8 having a pair of left and right traveling crawlers 8a that travel on the soil surface is disposed under the traveling chassis 2 of the combine harvester 1, and a thresher 6 is mounted on the upper side of the traveling chassis 2. Standing stalks are harvested by a harvesting and transporting device 5 at the front of the traveling chassis 2 and transported upward and rearward, and threshed while being held and transported by a feed chain 9a and a clamping rod 9b of the thresher 6. The threshed and sorted grains are supplied to a grain storage tank 9c disposed on the right side of the thresher 6 and temporarily stored therein.

[0023] A reaping and conveying device 5 is provided at the front of the traveling chassis 2, which is composed of a narrow guide 10a for separating the standing culms, each divided plant body 10b, each lifting device 10c for lifting the standing culms, each rake-in device 11a of the culm rake-in and conveying device 11 for rake-in the raised culms, a cutting blade device 10d for reaping the rake-in culms, and root and tip conveying devices 11b and 11c of the culm rake-in and conveying device 11 for clamping and conveying the reaped culms and delivering them to the feed chain 9a and clamping rod 9b of the thresher 6. The reaping and conveying device 5 is configured to be able to move up and down freely relative to the soil surface by a hydraulically driven telescopic cylinder 12.

[0024] A support pipe rod 13b provided at the upper end of a support rod 13a that slopes from the front lower part to the rear upper part of the reaping and conveying device 5 is rotatably supported by a support receiving base 5b provided on the upper side of the transmission case 3. When the telescopic cylinder 12 is operated, the reaping and conveying device 5 rotates up and down together with the support rod 13a.

[0025] An operating device 12b and a driver's seat 12c are provided at the upper rear of the harvesting and conveying device 5, and are used to start and stop the combine 1 and adjust each part. An engine 12a is mounted below the driver's seat 12c, and a grain storage tank 9c is disposed at the rear.

[0026] A potentiometer-type vehicle speed sensor 3b that detects the vehicle speed based on the output of a transmission mechanism (first transmission mechanism) 3a is provided in the transmission path of the transmission mechanism in a transmission case 3 for traveling mounted on the front end of the traveling chassis 2.

[0027] 2, a hydraulic variable speed changer 4 that changes the speed of the transmission mechanism 3a of the transmission case 3 to change the vehicle speed is provided at the upper rear part of the transmission case 3. The hydraulic variable speed changer 4 is composed of a hydraulic pump 4a, a trunnion shaft 4b, a hydraulic motor 4d, etc.

[0028] As shown in Figures 1 and 2, the traveling axle 14 protrudes to the left and right sides of the transmission case 3 and is internally supported on each wheel pipe 14b. A front drive sprocket 14a is provided on the traveling axle 14, and a rear sprocket 15a is supported on a rear axle 15 at the rear end. A plurality of rollers 15b are supported between the front and rear sprockets 14a, 15a, and the traveling crawlers 8a of the traveling device 8 are stretched on this.

[0029] 2, a bypass transmission case 16 is provided on the side of the transmission case 3, and houses a transmission mechanism (second transmission mechanism) 16a that connects the transmission case 3 and the hydraulic continuously variable transmission 4. Also, a parking brake device 3e is axially supported within the transmission case 3.

[0030] The main speed change lever 22 and the brake pedal 17 provided on the operating device 12b are provided by inserting the main speed change lever 22 into an operating hole 12e provided on a face plate 12d of the operating device 12b, as shown in Figures 5 to 7. When the main speed change lever 22 is operated in the front-rear direction of the operating hole 12e to the front end position of a crank-shaped elongated hole, forward travel is started, when the main speed change lever 22 is operated to the rear end position of the elongated hole, reverse travel is started, when the main speed change lever 22 is operated in the left-right direction to the right end position of the elongated hole, the neutral position is reached, and when the main speed change lever 22 is operated to the left end position, the parking brake is released.

[0031] A support boss 22a is provided at the lower end of the main speed change lever 22, and a mounting plate 22b is provided above this support boss 22a. The support boss 22a is inserted into a U-shaped support plate 22c, and a support pin 22d supports the main speed change lever 22 so that it can rotate left and right. A rotating arm 22e is supported on the lower surface of the support plate 22c by a rotating pin 22f so that it can rotate back and forth, and a receiving plate 22h is provided on one side of the rotating arm 22e.

[0032] A rod 4e is provided between and connected to a trunnion arm 4c provided on the hydraulic continuously variable transmission 4 and a rotating arm 22e. The hydraulic continuously variable transmission 4 is operated by rotating the main speed change lever 22 forward and backward. In addition, by rotating the main speed change lever 22 left and right, the parking brake is released by operating it to the neutral position or to the left end.

[0033] A brake pedal shaft 17a is rotatably supported at the lower end of the brake pedal 17, and a brake arm 17b having a claw portion (first claw portion) is provided on the brake pedal shaft 17a so as to rotate simultaneously with the brake pedal shaft 17a when the brake pedal 17 is depressed. A lock arm 17c having a claw portion (second claw portion) on its upper side which meshes with the claw portion of the brake arm 17b is provided rotatably about a support pin 17d. When the brake pedal 17 is not being depressed, the claw portion of the brake arm 17b and the claw portion of the lock arm 17c are in meshed state.

[0034] A wire (first wire) 18c is provided between and connects the brake arm 17b and left and right arms (left and right arms) 18a, 18b provided on the transmission case 3. When the brake pedal 17 is depressed, the brake arm 17b rotates, and the left and right arms 18a, 18b of the transmission case 3 are rotated via the wire 18c, thereby activating parking brake devices 3e, 3e provided in the transmission case 3, and applying the parking brake.

[0035] 4 shows the control section of the combine harvester 1, with the main speed change lever 22 standing on a side panel 35 provided on the side of the control seat 12c, a front monitor 40 that displays control information provided in front, and the parking brake pedal 25 journaled on a brake block 31 on the step floor 30, which is the floor surface. A grip sensor 34 is provided on the grip section of the main speed change lever 22 to detect when it is gripped by the operator.

[0036] 9 is an enlarged side view of the parking brake pedal 25. The pedal arm 25a is pivoted to the brake block 31 provided on the step floor 30 by a pivot shaft 28, and is connected to the brake mechanism of the transmission case 3 by a wire 18c connected to the lock arm 17c. A pressure adjuster 33 is provided below the parking brake pedal 25, which stands on the step floor 30 and adjusts the pressing force of the push rod 33c with a spring 33a for adjusting the pressing force and an adjustment bolt 33b, so that the pressing force of the parking brake pedal 25 can be adjusted. The pedal arm 25a is pulled up by a tension spring 25b provided on the brake block 31, and the foot contact sensor 26 detects when the operator's foot contacts the parking brake pedal 25. The return of the pedal arm 25a is resilient due to the tension spring 25b, and the pressing angle of the pedal arm 25a is detected by a pedal potentiometer 32.

[0037] Therefore, the pressure applied to the parking brake pedal 25 can be adjusted from the side by the pressure adjuster 33 according to the operator's preference.

[0038] 5, a wire (second wire) 17e is provided via a receiving plate 22h between the lock arm 17c and the mounting plate 22b of the main speed change lever 22. By operating the main speed change lever 22 to the parking brake release position, the lock arm 17c is rotated via the wire 17e provided to the main speed change lever 22, the claw of the lock arm 17c is disengaged from the claw of the brake arm 17b, the brake arm 17b is rotated, and the left and right arms 18a, 18b are rotated via the wire 18c, and the parking brake devices 3e, 3e are released from the parking brake position.

[0039] As shown in FIG. 6, when the main speed change lever 22 is operated to the parking brake release position, there is provided a release detection switch 19a of an "ON"-"OFF" switch type which detects this release operation position, and a horn 19b which emits a sound when the release detection switch 19a detects that it is "ON."

[0040] 2, a three-groove engine pulley 12h is supported on an engine shaft 12f of the engine 12a, so as to rotate and drive each part of the combine harvester 1. A belt 6c is stretched between the engine pulley 12h and a counter pulley 6b supported on a counter 6a for the thresher 6, and the rotational power of the engine 12a is input to rotate and drive the parts of the thresher 6 other than the feed chain 9a.

[0041] A belt 4h is stretched between an engine pulley 12h of the engine 12a and a pulley 4f attached to the hydraulic continuously variable transmission 4, and the rotational power of the engine 12a is input to rotate the hydraulic continuously variable transmission 4.

[0042] A belt 20d is stretched between a pulley 16c which is journalled to the output shaft (first output shaft) 16b of the bypass transmission case 16 via the hydraulic continuously variable transmission device 4, and a pulley 20c which is journalled to the chain input shaft 20b of a chain case 20 which houses a transmission mechanism 20a provided on the right side of the feed chain 9a of the threshing machine 6. A tension clutch device 20e is provided on this belt 20d, and the rotational power of the engine 12a is turned "on" and "off" to control the rotational drive or stop of the feed chain 9a. The rotational speed of the feed chain 9a is continuously variable according to the traveling vehicle speed, as shown in Figure 8, by the hydraulic continuously variable transmission device 4.

[0043] A belt 13d is stretched between an output pulley 16e journalled to an output shaft (second output shaft) 16d mounted across the transmission case 3 and the bypass transmission case 16, and a cutting input pulley 13c journalled to the support pipe rod 13b of the cutting and conveying device 5. The rotational power of the engine 12a is input to rotate the cutting and conveying device 5, and the hydraulic continuously variable transmission 4 continuously changes the rotational speed of the cutting and conveying device 5 in response to the vehicle speed, as shown in Figure 8.

[0044] 10 is a control block diagram of automatic control, in which the depression depth of the pedal potentiometer 32 of the parking brake pedal 25 and the foot contact detection signal of the foot contact sensor 26 are input to the input side of the control device 50, and the shift position and the grip signal of the operator are input from the lever potentiometer 36 of the main shift lever 22 to the grip sensor 34. The output side of the control device 50 outputs a control signal for the side clutch 54 to the side clutch on / off motor 51, a control signal for the hydraulic continuously variable transmission 4 to the trunnion motor 52, and a control signal for the cutting blade 55 to the cutting blade motor 53.

[0045] FIG. 11 is a flowchart of automatic control based on the shift position of the main shift lever 22. When the change in output of the lever potentiometer 36 of the main shift lever 22 stops for a predetermined time in step Sa03, the output of the hydraulic continuously variable transmission 4 is stopped in step Sa04. However, when the lever potentiometer 36 of the main shift lever 22 is operated to forward / reverse again in step Sa, the output of the hydraulic continuously variable transmission 4 is increased in step Sa08, the cutting blade 55 is stopped in step Sa10, and when the lever potentiometer 36 is not operated to forward / reverse, the main shift lever 22 is in neutral and the parking brake is released in step Sa14, the trunnion motor 52 is linked to increase or decrease the output of the hydraulic continuously variable transmission 4.

[0046] 12 is a flowchart of automatic control when main speed change lever 22 is operated after depressing parking brake pedal 25. When pedal potentiometer 32 detects depression in step Sb01, hydraulic variable speed change device 4 is stopped after a very short time in step Sb03, and when operation of main speed change lever 22 is detected again in step Sb05, forward or reverse is determined in step Sb06, the output of hydraulic variable speed change device 4 is increased, cutting blade motor 53 is stopped, and driving of cutting blade 55 is halted. If main speed change lever 22 is not operated, hydraulic variable speed change device 4 remains stopped in step Sb07.

[0047] 13 is a flowchart of automatic control of the parking brake pedal 25. In step Sd01, the pedal potentiometer 32 by the parking brake pedal 25 is read, in step Sd02, the foot contact sensor 26 is read, and in step Sd03, when the parking brake pedal 25 is in a locked state and the foot contact sensor 26 detects foot contact with the parking brake pedal 25 in step Sd04, in steps Sd05 and onwards, the side clutch on / off motor 51 is operated to turn off the side clutch, interrupting the traveling transmission and continuing the drive of the reaping conveyor 5. If the foot contact sensor 26 does not detect foot contact in step Sd04, in steps Sd09 and onwards, the output of the hydraulic continuously variable transmission 4 is stopped to stop the traveling and reaping drive.

[0048] 14 is a flowchart of automatic control of the main speed change lever 22 and the parking brake pedal 25, in which the pedal potentiometer 32 by the parking brake pedal 25 is read in step Sc01, the grip sensor 34 of the main speed change lever 22 is read in step Sc02, and when the parking brake pedal 25 is in a locked state in step Sc03 and the grip sensor 34 detects gripping in step Sc04, the pedal potentiometer 32 is detected in steps Sc05 and onwards, the parking brake pedal 25 is operated, and the output of the hydraulic continuously variable transmission 4 is increased or decreased to drive the reaping conveyor 5. If the grip sensor 34 is off in step Sc04, that is, if the main speed change lever 22 is not gripped, the output of the hydraulic continuously variable transmission 4 is stopped in steps Sc09 and onwards, and travel and reaping drive are stopped.

[0049] 15 to 17 show a sun visor installed above the cockpit 12c, with a mounting plate 41 of a pipe support frame 42 tilted upward and forward on a pivot shaft 45 attached to a support part of the aircraft at the rear of the cockpit 12c so that the angle of tilt can be changed with a lock pin 46. A square frame is assembled from vertical and horizontal crosspiece frames 44 on the upward sloping part of the pipe frame 42, and a top plate 47 is attached, with a polyurethane plate 48 attached to the front crosspiece frame 44a and rear crosspiece frame 44b at the bottom to protect the operator's head from injury even if it hits it.

[0050] The height and forward upward angle of this sun visor can be changed by a lock pin 46 located at the rear of the worker's head. [Explanation of symbols]

[0051] 2 Running chassis 5 Harvesting and transporting machine 6. Thresher 8 Running gear 22 Main gear shift lever 25 Parking pedal 30 Step Floor 33 Pressure adjustment tool 34 Grip Sensor

Claims

1. A combine harvester drives a harvesting and transporting device (5) mounted on the front of a running chassis (2) to harvest stalks and send them to a thresher (6), and the combine harvester is provided with a parking pedal (25) which, when stepped on by an operator, stops the running of the running device (8) but continues to drive the harvesting and transporting device (5), and a foot contact sensor (26) is provided to detect when the operator has his / her foot on the parking pedal (25), and when the operator takes his / her foot off the parking pedal (25) and the foot contact sensor (26) turns off, the combine harvester steering device cuts off power transmission to the harvesting and transporting device (5).

2. A combine steering device as described in claim 1, characterized in that a grip sensor (34) is provided on the grip portion of a main speed change lever (22) which changes the speed of the traveling device (8), and when the grip sensor (34) detects the operator's grip, power transmission to the harvesting and transporting device (5) continues even if the foot contact sensor (26) turns off after depressing the parking pedal (25).

3. 2. The steering device for a combine harvester according to claim 1, wherein the parking pedal (25) is provided with a depression pressure adjusting device (33) so that the traveling device (8) is stopped by a predetermined light depression of the parking pedal (25).

4. 4. A steering device for a combine harvester according to claim 3, wherein the tread pressure adjusting device (33) is provided so as to be adjustable from a side portion of the step floor (30).

5. A combine steering device as described in claim 1, characterized in that drive to the harvesting and transporting device (5) continues for a very short time after the foot contact sensor (26) turns off, and drive to the traveling device (8) is resumed if the main speed change lever (22) is operated during that time.

6. 2. The steering device for a combine harvester according to claim 1, wherein the speed change function of the main speed change lever (22) is restored when the parking pedal (25) is released and the main speed change lever (22) is returned to neutral.

Images