JP3853227B2 - Combine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combine that is configured to continuously drive a cereal conveying device through a continuously variable transmission.
[0002]
[Prior art]
A combine that drives and controls the pre-processing unit and the threshing unit of the threshing unit has been proposed in conjunction with the traveling speed of the airframe and the output rotation of the engine. In such a combine, when the traveling of the combine is stopped in a normal operation state in which the mowing operation is performed, the output rotation of the continuously variable transmission that drives the pre-processing unit and the threshing unit of the threshing unit is also stopped. Therefore, if the power is turned off after the combine is stopped, when the power is turned on again, the pre-processing unit and the threshing unit cereal conveyor device start driving in the stopped state until the target speed is reached. Increased speed.
[0003]
[Problems to be solved by the invention]
Depending on the driver, there is a case where the combine is suddenly stopped by shutting off the power source for some reason during the driving, even though the combine is traveling at a high speed. Then, since the pre-processing unit and the threshing unit of the threshing unit will stop in a state of being driven at high speed, when the power is turned on again, the pre-processing unit and the threshing unit of the cereal conveyance of the pre-processing unit and the threshing unit suddenly The apparatus will be driven at a high speed, which is extremely dangerous especially when handling work or the like.
[0004]
In view of the above circumstances, even when the power supply is shut off and the combine is stopped during high-speed traveling, the present invention enables the pre-processing unit and the threshing unit cereal conveyance device to reach the target speed from the low speed side. The purpose is to provide a combine harvester.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 is a combine (1) configured to continuously drive the grain feeder (31, 46, 52) via a hydrostatic transmission (35),
A large-diameter fan gear (35b) is fixed to the trunnion shaft (35a) of the hydrostatic transmission (35), and the electric motor (37) is interlocked with the fan gear via a small-diameter gear (37b).
Control means for driving the electric motor (37) in the deceleration direction so that the output rotation of the hydrostatic transmission (35) is stopped when the combine (1) is powered on is provided. There is a combine to do.
[0006]
The invention according to claim 2 is characterized in that the culm transporting device (31, 46, 52) is the culm transporting device (46, 52) in the pre-processing unit (9). In the combine.
[0008]
Note that the reference numerals in parentheses are for comparison with the drawings, and are for convenience of understanding the invention and do not affect the scope of the claims. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
1 to 6 show an embodiment of the present invention. FIG. 1 is a side view showing an example of a combine to which the present invention is applied. FIG. 2 is a drive showing a drive system of the combine shown in FIG. 3 is a side view showing the relationship between the preprocessing HST and the drive motor in FIG. 2, FIG. 4 is a block diagram showing the control system of the combine shown in FIG. 1, and FIG. 5 is shown in FIG. FIG. 6 is a flow chart showing a control process performed in the control system, and FIG. 6 is a time chart of the control performed in the control system shown in FIG.
[0011]
In FIG. 1, a combine 1 that harvests and thresh cereals has a machine body 3 supported by a pair of left and right crawler travel devices 2 and 2. A driver's seat 5 is disposed on either the left or right side of the front part (right side in FIG. 1) of the airframe 3, and an engine 6 is disposed thereafter. Further, a grain tank 7 is disposed after the engine 6 (left side in FIG. 1).
[0012]
In addition, a pre-processing unit 9 (a mowing device) that harvests and transports the cereal is disposed at the tip of the machine body 3. On the side where the driver's seat 5 of the airframe 3 is not disposed, a threshing unit 10 for threshing the cereals fed from the pretreatment unit 9 is disposed, and the grain is threshed at the rear part. A discharge part 11 for discharging the soot is disposed.
[0013]
The driver's seat 5 includes a main transmission lever 12 that operates forward and reverse of the combine 1 and its traveling speed, a sub-shift lever (not shown) that operates the traveling speed of the combine 1, A multi-steering lever 13 for operating a turning operation and raising / lowering of the preprocessing unit 9; a work machine clutch lever 26 (see FIG. 2) for transmitting and interrupting power to the preprocessing unit 9 and the threshing unit 10; In addition to the mowing clutch lever 15 and the like for transmitting and interrupting power to the pre-processing unit 9, various switches (not shown) necessary for the operation of the combine 1 are arranged.
[0014]
The drive system of the combine 1 using the engine 6 (E / G) as a power source is configured as shown in FIG. The transmission 16 (T / M) constituting the travel drive system of the combine 1 includes a travel drive continuously variable transmission 17 (hydrostatic transmission, hereinafter referred to as travel HST) constituting the main transmission, A transmission 19 and a gear train 20 are arranged to drive the crawler travel devices 2 and 2. A T / M rotation sensor 21 is connected to the output shaft of the auxiliary transmission 19 so that the output rotation of the output shaft of the auxiliary transmission 19 is detected as the output rotation of the transmission 16.
[0015]
Transmission of power from the engine 6 to the transmission 16 (the traveling HST 17) includes a pulley 6b fixed to the output shaft 6a of the engine 6 and a pulley 17b fixed to the input shaft 17a of the traveling HST 17. This is performed by the belt 22 that is stretched between the two. The output rotation of the traveling HST 17 is transmitted to the auxiliary transmission 19 through a gear 17d fixed to the output shaft 17c of the traveling HST 17.
[0016]
A drive shaft 23 that drives the pretreatment unit 9 and the threshing unit 10 is rotatably supported at a predetermined position of the combine 1. Transmission of power from the engine 6 to the drive shaft 23 is performed by a belt 25 that is stretched between a pulley 6c fixed to the output shaft 6a of the engine 6 and a pulley 23a fixed to the drive shaft 23. Is done. The belt 25 is provided with a work implement clutch 27 that is constituted by a tension clutch and is operated by the work implement clutch lever 26. By the operation of the work implement clutch lever 26, the engine 6 and the drive shaft 23 are connected to each other. Power transmission and interruption between them is performed.
[0017]
The intermediate shaft 29 is rotatably supported at a predetermined position of the combine 1. Transmission of power from the drive shaft 23 to the intermediate shaft 29 includes a bevel gear 23b fixed to the drive shaft 23, and a bevel gear 29a fixed to the intermediate shaft 29 so as to mesh with the bevel gear 23b. Is done by.
[0018]
The threshing unit 10 is rotatably supported at a predetermined position of the machine body 3 and is disposed so as to be movable along the handle cylinder 30 on the machine body 30 for threshing the cereal husk. A feed chain 31 for carrying the cereals is provided. Transmission of power from the intermediate shaft 29 to the handling cylinder 30 is performed between a pulley 29b fixed to the intermediate shaft 29 and a pulley 30b fixed to one end of the input shaft 30a of the handling cylinder 30. This is performed by the belt 32 that has been stretched. Accordingly, when the work implement clutch 27 is in a power transmission (connected) state, the handling drum 30 is driven to rotate.
[0019]
The preprocessing transmission 33 includes a preprocessing driving continuously variable transmission 35 (hydrostatic transmission, hereinafter referred to as preprocessing HST). Transmission of power from the drive shaft 23 to the preprocessing transmission 33 includes a pulley 23c fixed to the drive shaft 23 and an input shaft 33a of the preprocessing transmission 33 (input of the preprocessing HST 35). This is performed by a belt 36 that is stretched between a pulley 33b fixed to the shaft).
[0020]
The preprocessing HST 35 includes a drive motor 37, and the output rotation of the preprocessing HST 35 is controlled by the drive motor 37. The output shaft 33 c of the preprocessing transmission 33 is connected to the output of the transmission 16. The feed chain 31 of the pre-processing unit 9 and the threshing unit 10 is rotated in the T / M proportional mode for rotating in proportion to the rotation or in the E / G proportional mode for rotating in proportion to the output rotation of the engine 6. To drive. An HTS rotation sensor 39 is connected to the output shaft 33c of the preprocessing transmission, and the output rotation of the output shaft 33c is detected as the output rotation of the preprocessing transmission 33.
[0021]
The pretreatment drive shaft 40 is rotatably supported at a predetermined position of the combine 1. Transmission of power from the preprocessing transmission 33 to the preprocessing drive shaft 40 is fixed to the pulley 33d fixed to the output shaft 33c of the preprocessing transmission 33 and to the preprocessing drive shaft 40. This is performed by a belt 41 that is stretched between pulleys 40a. The belt 41 includes a tension clutch and a cutting clutch 42 that is operated by the cutting clutch lever 15. By operating the cutting clutch lever 15, the preprocessing transmission 33 and the preprocessing drive shaft are arranged. Power transmission to and from 40 is performed.
[0022]
The intermediate shaft 43 is rotatably supported at a predetermined position of the combine 1. Transmission of power from the pretreatment drive shaft 40 to the intermediate shaft 43 is fixed to the intermediate shaft 43 so as to mesh with the bevel gear 40b fixed to the pretreatment drive shaft 40 and the bevel gear 40b. This is performed by the bevel gear 43a.
[0023]
A handling depth conveying device 45 that conveys the harvested cereal to the feed chain 31 is disposed at a predetermined position of the machine body 3. The handling depth transport device 45 includes a transport chain 46 that includes a chain that transports the stock of cereal and a chain that transports the tip of the cereal. The transport chain 46 is stretched over a sprocket 43 b fixed to the intermediate shaft 43, and is driven by the rotation of the pretreatment drive shaft 40. A handling depth main sensor 47 is arranged along the grain path of the transport chain 46 so as to detect the presence or absence of the grain chain transported by the transport chain 46.
[0024]
The transmission shaft 49 is rotatably supported at a predetermined position of the combine 1. Transmission of power from the pretreatment drive shaft 40 to the transmission shaft 49 is fixed to the transmission shaft 49 so as to mesh with the bevel gear 40c fixed to the pretreatment drive shaft 40 and the bevel gear 40c. This is performed by the bevel gear 49a. The transmission shaft 49 drives the cutting blade 50 and is scraped through a gear 49b fixed to the transmission shaft 49, a gear 52a meshing with the gear 49b, and a gear 52b meshing with the gear 52a. The conveyor belt 52 of the device 51 is driven.
[0025]
The drive shaft 53 is rotatably supported at a predetermined position of the combine 1. Transmission of power from the preprocessing transmission 33 to the drive shaft 53 is engaged with a gear 33e fixed to the output shaft 33c of the preprocessing transmission 33, and the intermediate shaft 33f of the preprocessing transmission 33 is engaged. This is performed by a chain 55 spanned between a sprocket 33 h fixed integrally with a gear 33 g that is rotatably supported by the sprocket 53 a and a sprocket 53 a fixed to the drive shaft 53. The feed chain 31 is driven by a sprocket 53b fixed to the drive shaft 53.
[0026]
The pretreatment HST 35 and the drive motor 37 are arranged as shown in FIG. A fan-shaped gear 35b is fixed to the trunnion shaft 35a of the preprocessing HST 35 attached to the gear case 33j of the preprocessing transmission 33, and a pin 35c is projected from the gear 33b. A fan 57 for blowing air is fixed to the input shaft 33a of the pretreatment HST 35 so as to cool the pretreatment HST 35.
[0027]
The deceleration-side limit switch 55 and the acceleration-side limit switch 56 are respectively located on the movement path of the pin 35c that is moved by the swing of the gear 35b, and detect the swing end of the gear 35b. Has been placed. The drive motor 37 is disposed at a position close to the gear 35b, and a gear 37b that meshes with the gear 35b is fixed to the output shaft 37a.
[0028]
Accordingly, when the drive motor 37 is driven to rotate the small-diameter gear 37b, the large-diameter gear 35b meshing with the gear 37b is rotated, and the trunnion shaft 35a is rotated to rotate the pre-processing gear. The output rotation of the HST 35 can be controlled. By controlling the output rotation of the preprocessing HST 35, the output rotation of the output shaft 33c of the preprocessing transmission 33 can be controlled. The drive motor 37 stops driving when the pin 35c is detected by any of the limit switches 55 and 56. For example, when the limit switch 55 on the deceleration side detects the pin 35c, the output rotation of the preprocessing HST 35 becomes “0”.
[0029]
The control device of the combine 1 having such a configuration is configured as shown in FIG. The control device 60 includes an input interface 61, a microcomputer 62, and an output interface 63, and is connected to the main switch 65 of the combine 1.
[0030]
The input interface 61 includes a work machine clutch that detects the operating position of the work machine clutch lever 26 (connection / disconnection of the work machine clutch 27) of the deceleration side limit switch 55, the speed increase side limit switch 56, and the work machine clutch lever 26. When the switch 66, the combine 1 is stopped or the pre-processing unit is stopped due to the rise of the pre-processing unit 9, the pre-processing unit 9 is forcibly activated to convey the harvested culm to a predetermined position. A switch 67, an overturn switch 69 for detecting the speed (inclination, standard, traveling) selected by the sub-transmission 19 according to the grain habit, the T / M rotation sensor 21, the HST rotation sensor 39, etc. are connected. Yes.
[0031]
In addition, the input interface 61 includes a lift potentiometer 70 for detecting the position of the pre-processing unit 9 in the up-and-down direction, the handling depth main sensor 47, and the operation position of the cutting clutch lever 15 (connection of the cutting clutch 42). , Cut-off clutch switch 71 and lift shut switch 72 for selecting whether the function of stopping the driving of the pre-processing unit 9 when the pre-processing unit 9 rises above a preset height is enabled or disabled. Also, a lift raising switch 73 for raising the preprocessing unit 9 and an engine rotation sensor 75 for detecting the output rotation of the engine 6 are connected.
[0032]
A drive circuit 80 for driving the drive motor 37 of the preprocessing HST 35 is connected to the output interface 63. The output interface 63 is connected to a horn 76, a hand lamp 77, an E / G stop solenoid 79, and the like.
[0033]
After the combine 1 is put in the field, the combine 1 having such a structure is put in the working machine clutch 27 and the mowing clutch 42 and the pretreatment unit 9 and the threshing unit 10 are driven, and the traveling direction of the combine 1 Advance in the direction of the array. Then, first, the divider of the pre-processing unit 9 separates the cereals into the cereal array. The cereals that have been weeded by the divider are transported by the pulling device, and the stock is cut and cut by the cutting blade 50.
[0034]
The harvested culm is scraped by the scraping device 51, transported to the handling depth transport device 45 by the transport belt 52, and delivered to the handling depth transport device 45. The cereals passed to the handling depth conveying device 45 are detected by the handling depth main sensor 47 while being conveyed by the handling depth conveying device 45, and a stock and tip sensor (not shown). The tip position is detected. Then, based on the detection result, the handling depth conveying device 45 swings and passes the cereal to the feed chain 31 so that the tip position of the cereal passes through the appropriate position of the threshing unit 10.
[0035]
The cereals passed to the feed chain 31 are transported and threshed so that their tips contact the handling cylinder 30. The mash that has been threshed and conveyed to the end of the feed chain 31 is delivered to the discharge unit 11 and discharged from the rear part of the combine 1. On the other hand, the grain mixed with the toothpick threshed from the cereal is sorted through a sorting unit (not shown) and temporarily stored in the grain tank 7.
[0036]
Control when the power is turned on in the control device 60 of the combine 1 will be described with reference to a flowchart shown in FIG. 5 and a timing chart shown in FIG. In the following description, it is assumed that when the combine 1 is powered off, “0” is set to the initial flag.
[0037]
When the power of the combine 1 is turned on, the control device 60 determines an initial flag (step S1 in FIG. 5, hereinafter, simply referred to as step S). If the initial flag is “0” in step S1, “1” is set in the initial flag (step S2). It should be noted that the initial flag is already set to “1” when the combine 1 is stopped and started without shutting off the power supply during normal mowing work.
[0038]
When the initial flag “1” is set in step S2, the control device 60 sets an initial deceleration output timer (not shown) in the microcomputer 62 substantially simultaneously with the activation of the microcomputer 62 as shown in FIG. At time t1, the drive motor 37 is driven to set a time ts required to stop the output rotation of the preprocessing HST 35 (step S3). During this time ts, the gear 35b is swung by driving the drive motor 37 shown in FIG. 3, and the pin 35c moves from one limit switch 55 (or 56) to the other limit switch 56 (or 55). The time is longer than necessary. At the same time, the subtraction of the time ts is started. Further, the drive motor control means 80 is set so as to rotate the drive motor 37 in the deceleration direction (step S4).
[0039]
If the initial flag is “1” in step S1 and if the initial flag is set to “1” in step S2, whether there is a remaining time of the time ts set in the initial deceleration output timer in step S3. Determine (step S5). In the normal cutting operation, when the combine 1 is stopped and started without shutting off the power, the time ts set in the initial deceleration output timer is not set because the time ts is not set in the initial deceleration output timer. It is determined that it has passed.
[0040]
Then, when the time ts set in the initial deceleration output timer has elapsed (when shifting to a normal working state), the vehicle speed control mode selected by the sub-transmission 19 (slope, standard, traveling) Is determined (step S6). Further, the drive condition of the preprocessing unit 9 (ON / OFF of the mowing clutch switch 71) is determined (step S7). Further, in order to drive the preprocessing unit 9 in conjunction with the vehicle speed of the combine 1, a target value for the output rotation of the preprocessing HST 35 is calculated (step S8). Further, the work implement clutch switch 66 and the mowing clutch switch 71 are confirmed, and the work implement clutch 27 and the mowing clutch 42 are set to control the output mode (step S9). That is, when the combine 1 is in a normal work state, the output of the preprocessing HST 35 is controlled to be linked to the vehicle speed of the combine 1 or the output rotation of the engine 6.
[0041]
When the time ts set in the initial deceleration output timer in step S5 has not elapsed (when the combine 1 is powered on), the initial deceleration output is given to the drive circuit 80 almost simultaneously with the activation of the microcomputer 62, and the drive motor 37 is turned on. The pre-processing HST 35 is driven in the deceleration direction. Then, as shown in FIG. 6, when the limit switch 55 on the deceleration side is turned on at time t2, the control device 60 detects the rising edge of the ON signal of the limit switch 55 and stops driving the drive motor 37. (Step S10).
[0042]
At this time, even if the trunnion shaft 35 a of the preprocessing HST 35 rotates further to the minus side than the position where the output rotation of the preprocessing HST 35 becomes “0”, the output of the preprocessing HST 35 does not reverse. When the limit switch 55 is turned on, the control device 60 stops driving the drive motor 37 even if the time ts has not elapsed.
[0043]
In this way, from the state where the output rotation of the preprocessing HST 35 is stopped, the output rotation of the preprocessing HST 35 is directed toward the target value so as to be linked to the traveling speed of the combine 1 or the output rotation of the engine 6 again. Increase speed control. That is, the cereal conveyors such as the feed chain 31, the conveyor chain 46, and the conveyor belt 52 are always driven to approach the target speed from the stopped state, so that the combine 1 is stopped by the power supply being cut off. Even if the power is turned on to the combine 1, the cereal carrying device is not driven at a high speed. Therefore, work safety can be ensured. Moreover, since it drives toward a target speed from a stop state, the speed control of the grain feeder with respect to the target speed can be performed more accurately.
[0044]
In the above-described embodiment, as the cereal conveying device driven via the continuously variable transmission, the conveying chain 46 of the handling depth conveying device 45 and the conveying belt 52 of the pretreatment unit 9 Although the case where the feed chain 31 of the threshing unit 10 is driven through the same pretreatment HST 35 is illustrated, the transport chain 46 and the transport belt 52 and the feed chain 31 of the threshing unit 10 are respectively differently variable. You may make it drive through a machine.
[0046]
【The invention's effect】
According to the first aspect of the invention, when the combine is turned on, the speed change operation means of the continuously variable transmission for conveying the cereal is driven in the deceleration direction so that the output of the continuously variable transmission is stopped. The pre-processing transport device that transports cereals in the pre-processing unit and the feed chain that transports cereals in the threshing unit will always start rotating at a low speed and increase to the target number of rotations. Safety can be improved.
[0047]
According to the second aspect of the present invention, stable reaping work can be performed by preventing spillage or clogging of cereals in the pretreatment unit.
[0048]
According to the first aspect of the present invention, the continuously variable transmission is constituted by a hydrostatic transmission, the speed change operation means of the hydrostatic transmission is constituted by an electric motor, and the control means is configured to connect the electric motor when the power is turned on. pressurized et al. Thus is driven the reduction side trunnion shaft of the static hydraulic transmission, simplifies control at power-on, it is possible to perform stable control.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a combine to which the present invention is applied.
FIG. 2 is a drive system diagram showing a drive system of the combine shown in FIG. 1;
3 is a side view showing the relationship between the preprocessing HST and the drive motor in FIG. 2. FIG.
4 is a block diagram showing a control system of the combine shown in FIG.
FIG. 5 is a flowchart showing a control process performed in the control system shown in FIG. 4;
6 is a time chart of control performed in the control system shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Combine 9 ... Pre-processing part 31 ... Grain conveying device (feed chain)
35. Continuously variable transmission (HST for pretreatment)
35a ... trunnion shaft 37 ... speed change operation means (drive motor)
46 ... Grain conveying device (conveying chain)
52 ... Grain conveying device (conveying belt)
60... Control means (control device)

Claims (2)

The culms conveying device through a hydrostatic transmission a combine which is adapted to the continuously variable drive,
A large-diameter fan gear is fixed to the trunnion shaft of the hydrostatic transmission, and an electric motor is linked to the fan gear via a small-diameter gear,
A combine provided with control means for driving the electric motor in a decelerating direction so that the output rotation of the hydrostatic transmission is stopped when the combine power is turned on.   The combine according to claim 1, wherein the cereal conveying apparatus is a cereal conveying apparatus in a preprocessing unit.

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