JP2005040108A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester in which conveying speed of stem stalks can be adequately suited to a variety of works. <P>SOLUTION: In this combine harvester 1 that is equipped with a control unit 52 that controls the stem stalks-conveying speed, the control unit 52 has a vehicle speed-synchronizing mode where the conveying speed of the stem stalk is varied depending on a vehicle speed and a constant speed drive controlling mode where the stem stalk-conveying speed is kept at a prescribed one regardless of the vehicle speed and the prescribed speed is changed according to a prescribed operation. In addition, the control unit 52 changes the prescribed speed in the constant speed drive controlling mode in response to the operations of already set operation devices 46, 47 attached to a steering lever 44. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a combine provided with a stalk conveyance control unit that controls the conveyance speed of stalks in a pretreatment unit and a threshing unit.

  In general, in this type of combine, a constant speed driving method and a vehicle speed tuning method are known as methods for controlling the speed of transporting the stems and stems in the pretreatment unit and the threshing unit. The constant speed drive method is a method that keeps the pedicle conveyance speed constant regardless of the vehicle speed. When cutting at the standard vehicle speed, stable cutting and threshing are performed, but at low speed cutting or high speed cutting. Sometimes, the conveyance speed becomes excessive and insufficient, and the processing accuracy may be reduced.

  On the other hand, the vehicle speed synchronization method is a method of changing the shoot conveyance speed according to the vehicle speed. When cutting at a standard vehicle speed or when cutting at a high speed, the shoot conveyance speed depends on the vehicle speed. However, when cutting low speed (especially when harvesting lodging materials at very low speed), the pedicle transfer speed becomes too slow, There is a possibility that the cutting will be hindered (especially the occurrence of lodging materials).

Therefore, there has been proposed a combine that includes a constant speed driving method and a vehicle speed tuning method so that either method can be selected (see, for example, Patent Document 1). According to the combine configured as described above, it is possible to enhance the adaptability of the shoot conveyance speed with respect to the work conditions by selectively switching between the constant speed driving method and the vehicle speed synchronization method according to the work conditions.
JP 54-153122 A (page 1, FIG. 2)

  However, the low adaptability of the stalk conveyance speed during low-speed cutting is a problem common to the constant speed driving method and the vehicle speed tuning method, even if the constant speed driving method and the vehicle speed tuning method can be switched. Therefore, it was difficult to optimize the stalk transport speed during low-speed cutting. In particular, when trimming the lodging material, the appropriate vehicle speed and stalk conveyance speed slightly change depending on the lodging state, and therefore it is difficult to cope with switching of a simple method.

The present invention was created for the purpose of solving these problems in view of the above situation, and in a combine equipped with a shoot and mash transport control unit for controlling the shoot and mash transport speed, The control unit has a vehicle speed synchronization control mode for changing the shoot conveyance speed according to a vehicle speed, and maintains the shoot conveyance speed at a set speed regardless of the vehicle speed, and changes the set speed according to a predetermined operation. And a constant speed drive control mode. In other words, a vehicle speed synchronization control mode (vehicle speed synchronization method) for changing the shoot conveyance speed according to the vehicle speed, and a constant speed drive control mode (constant speed drive system) for maintaining the shoot conveyance speed at the set speed regardless of the vehicle speed. In addition to providing, in the constant speed drive control mode, the set speed can be changed according to a predetermined operation, so by selecting the constant speed drive control mode and changing the set speed, The speed can be adapted to various working conditions. For example, when harvesting the lodging material at low speed, select the constant speed drive control mode and change the set speed according to the lodging state of the lodging material to optimize the pedicle conveyance speed and process the lodging material Efficiency and processing accuracy can be improved.
In addition, the stalk conveyance control unit changes the set speed in the constant speed drive control mode according to an operation of an existing operation tool provided on the steering lever. In this case, the set speed in the constant speed drive control mode can be changed using the existing operation tool provided on the steering lever. Therefore, the number of parts is smaller than when a dedicated operation tool is added. Reduction and cost reduction. In addition, since the steering lever is always operated by the operator during traveling, there is also an advantage that it is easy to change the shoot conveyance speed.
Further, the stalk conveyance control unit changes the set speed in the constant speed drive control mode in accordance with an operation of a dedicated operation tool. In this case, compared with the case where the existing operation tool is also used, there is an advantage that the function of the operation tool becomes clear and erroneous operation can be prevented.

  According to the present invention, a vehicle speed synchronization control mode (vehicle speed synchronization method) that changes the shoot conveyance speed according to the vehicle speed, and a constant speed drive control mode (constant speed drive) that maintains the shoot conveyance speed at a set speed regardless of the vehicle speed. In the constant speed drive control mode, the set speed can be changed according to a predetermined operation. Therefore, by selecting the constant speed drive control mode and changing the set speed, The stalk conveyance speed can be adapted to various working conditions.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes a combine, and the combine 1 includes a pre-processing unit 2 that cuts the stems and a threshing unit 3 that threshs the grains from the cutting stalks and selects the grains. , A grain tank 4 for storing the selected grains, a post-processing unit 5 for processing the threshed waste, an operation unit 6 provided with various operation tools, and a crawler type traveling unit 7 Configured.

  The pre-processing unit 2 includes a divider 2a for weeding the uncut stem culm, a pulling device 2b for causing the weed stalk culm, and a cutting blade device (not shown) for cutting the stock position of the stem culm And a pretreatment conveying device 2c that conveys the mowing stem pod toward the threshing unit 3, and is connected to the front part of the body of the combine 1 so as to be movable up and down.

  The threshing unit 3 includes a handling chamber (not shown) that houses the handling cylinder 3a, a sorting chamber (not shown) that sorts the threshed grains, and a threshing feed chain that conveys stalks along the handling chamber. 10 and a waste transporting device (not shown) for transporting the threshed waste to the post-processing unit 5 and is configured in a unit shape, and is mounted on the body frame 11 in the body assembly process. The The threshing feed chain 10 is suspended by a plurality of driven sprockets (not shown) and a single drive sprocket 12, and is transported according to the rotation of the drive sprocket 12.

  As shown in FIG. 3, the combine 1 is equipped with an engine 13 that supplies power to the pretreatment unit 2, the threshing unit 3, the grain tank 4, the traveling unit 7, and the threshing feed chain 10. The grain tank 4 inputs engine power through the engine pulley 14, the transmission belt 15, and the tank input pulley 16, and operates a spiral conveyance body (not shown) in the tank with this power. The power of the traveling unit 7 is transmitted to the transmission case 19 via the engine pulley 14, the transmission belt 17 and the transmission input pulley 18, and is shifted by a traveling continuously variable transmission (HST) 20 provided in the transmission case 19. Then, it is transmitted to the drive wheel 7a of the traveling unit 7.

  The power of the threshing unit 3 is once transmitted to the input shaft 24 of the gear case 23 described later via the engine pulley 14, the work machine transmission belt 21 and the gear case input pulley 22, from which the counter pulley 25, the threshing transmission belt 26 and the threshing are performed. It is transmitted to the threshing unit 3 through the input pulley 27. This power is transmitted to the swing sorter 29 in the sorting chamber through the Karatsu shaft 28 and to the handling cylinder 3a through the transmission belt 30 and the like.

  The gear case 23 is configured to continuously change engine power input from the input shaft 24 by a preprocessing continuously variable transmission (HST) 31 and supply the power to the preprocessing unit 2 and the threshing feed chain 10. . Thereby, the stalk conveyance speed of the pre-processing unit 2 and the threshing feed chain 10 can be arbitrarily changed independently of the vehicle speed. The preprocessing continuously variable transmission 31 includes an HST pump (swash plate type variable displacement hydraulic pump) 32 and an HST motor (fixed displacement hydraulic motor) 33 that is driven by the oil discharged from the HST pump 32. The engine power can be steplessly changed according to the operation of the swash plate of the HST pump 32. In this embodiment, a swash plate control motor 34 is connected to the swash plate of the HST pump 32, and the swash plate operation is performed via the swash plate control motor 34.

  A threshing feed chain drive shaft 36 extending toward the threshing feed chain 10 is connected to the feed chain output shaft 35 of the gear case 23. The threshing feed chain drive shaft 36 reaches the left end of the machine body so as to cross the front of the threshing unit 3 above the machine frame 11 and drives the drive sprocket 12 connected to the tip part. On the other hand, the preprocessing output shaft 37 of the gear case 23 is provided with a preprocessing output pulley 38, from which power is supplied to the preprocessing unit 2 via the preprocessing transmission belt 39 and the preprocessing input pulley 40. . In addition, a belt tension type mowing clutch 41 is configured between the preprocessing output pulley 38 and the preprocessing input pulley 40, and power supply to the preprocessing unit 2 is intermittently performed according to the on / off operation thereof. . A belt tension type work machine clutch 42 is also formed between the engine pulley 14 and the gear case input pulley 22 described above, and power is supplied to the threshing unit 3 and the gear case 23 according to the on / off operation thereof. Is intermittent.

  As shown in FIG. 4, a driver's seat 43 is provided in the operation unit 6, and a steering lever 44 is disposed in front of the driver's seat 43. The steering lever 44 of the present embodiment is also used as a lifting / lowering operation tool of the preprocessing unit 2, and operations in the left / right direction (steering) and the front / rear direction (preprocessing lifting / lowering) are allowed. As shown in FIG. 5, a pair of left and right steering switches 45 </ b> L and 45 </ b> R, a cutting height release switch 46 and a horn switch 47 are provided on the grip portion of the steering lever 44. These switches 45 to 47 are momentary switches that do not hold the ON state. The steering switches 45L and 45R are operating tools for correcting the direction of the aircraft, and the side clutch is disengaged according to the operation. The cutting height release switch 46 is an operating tool for temporarily releasing the cutting height automatic control (the function of automatically controlling the cutting height of the preprocessing unit 2). The horn switch 47 is an operation tool for blowing a horn (not shown).

  On the left side of the driver's seat 43, a main transmission lever 48 and an auxiliary transmission lever 49 are arranged. The main transmission lever 48 is an operating tool for shifting the traveling continuously variable transmission 20 described above, and the grip portion includes a forced take-in switch 50 and an overturning cut switch 51 as shown in FIG. Is provided. The forced scraping switch 50 is an operating tool for forcibly putting the stalk remaining in the pretreatment unit 2 into the threshing unit 3 when the machine is stopped, and is constituted by a momentary switch. The lodging cut switch 51 is an operating tool for increasing the operating speed of the preprocessing unit 2 and is configured by an alternate switch that maintains an ON state. The auxiliary transmission lever 49 is an operating tool for operating the auxiliary transmission mechanism in the mission case 19, and the vehicle speed is changed stepwise in accordance with the operation.

  As shown in FIG. 7, the combine 1 includes a control unit (stalk conveyance control unit) 52 configured by a microcomputer or the like. On the input side of the control unit 52, in addition to the cutting height release switch 46, the horn switch 47, the forced take-in switch 50 and the overturning cutting switch 51 described above, the auxiliary transmission switch 53 for detecting the low speed position of the auxiliary transmission lever 49, work A work machine clutch switch 54 that detects on / off of the machine clutch 42, a cutting clutch switch 55 that detects on / off of the cutting clutch 41, a vehicle speed sensor 56 that detects the vehicle speed, and a main position that detects the operating position of the main transmission lever 48. The shift sensor 57 and the HST rotation sensor 58 that detects the output rotation of the preprocessing continuously variable transmission 31 are connected. On the output side of the control unit 52, the swash plate control motor 34 described above is connected. ing. The control unit 52 includes a CPU, ROM, RAM, and the like, and also includes a nonvolatile memory 59 such as an EEPROM that retains stored contents even when the power is turned off.

  Next, the control content of the control part 52 is demonstrated with reference to a flowchart. As shown in FIG. 8, the control unit 52 performs a predetermined initialization process upon activation, and then determines the states of the auxiliary transmission switch 53, the lodging trimming switch 51, and the forced take-in switch 50. Is set to ON, the constant speed drive control mode flag is set. Next, after executing a handling depth control routine, a selection control routine, and the like, a constant speed drive control mode flag is referred to, and when this is in a reset state, a vehicle speed tuning control routine (vehicle speed tuning control mode) is executed. The vehicle speed tuning control routine is a shoot conveyance control mode for controlling the speed of the continuously variable transmission 31 for preprocessing so that the shoot conveyance speed of the preprocessing unit 2 and the threshing feed chain 10 is proportional to the vehicle speed. When cutting at a vehicle speed or when cutting at a high speed, the pedicle conveyance speed is appropriately changed according to the vehicle speed, so that highly efficient and accurate work can be performed.

  If the constant speed drive control mode flag is set, it is determined whether the work implement clutch 42 is on / off, and if this is off, the drive of the preprocessing continuously variable transmission 31 is stopped, When the work implement clutch 42 is engaged, the preprocessing continuously variable transmission 31 is driven at a constant speed so that the set speed (set speed of the HST rotation sensor) is obtained. Thereafter, whether the cutting clutch 41 is on / off is determined. If this is the case, the operating state of the cutting height release switch 46 and the horn switch 47 is determined. When the cutting height release switch 46 is ON, after setting the manual flag, the driving speed of the preprocessing continuously variable transmission 31 is increased, and when the horn switch 47 is ON, manual driving is performed. After setting the flag, the drive speed of the preprocessing continuously variable transmission 31 is reduced.

  That is, as shown in FIG. 9, the control unit 52 includes a vehicle speed synchronization control mode that changes the shoot conveyance speed according to the vehicle speed, and a constant speed drive control mode that maintains the shoot conveyance speed at a set speed regardless of the vehicle speed. In the constant speed drive control mode, the set speed is changed in accordance with a predetermined operation. Accordingly, if the constant speed drive control mode is selected and the set speed is changed, the shoot conveyance speed can be adapted to various work conditions. For example, when harvesting the lodging material at low speed, the constant speed drive control mode is set, and the setting speed is changed according to the lodging state of the lodging material, thereby optimizing the pedicle conveyance speed and processing efficiency and processing of the lodging material Accuracy can be improved.

  Further, in the constant speed drive control mode, the set speed is changed according to the operation of the existing switches 46 and 47 provided on the steering lever 44, so the number of parts is reduced compared to the case where a dedicated operation tool is added. And cost reduction. In addition, since the steering lever 44 is always operated by the operator during traveling, it is easy to change the stalk conveyance speed.

  Further, in the present embodiment, when the set speed in the constant speed drive control mode is changed, the current rotational speed of the HST rotation sensor 58 is written in the nonvolatile memory 59 as the set speed in the constant speed drive control mode, and at the constant speed The setting speed of the drive control mode is updated based on the current rotation speed of the HST rotation sensor 58. Thereby, even if the main power supply of the combine 1 is turned off, it becomes possible to reproduce the stem transport speed at the previous work by reading the set speed data from the nonvolatile memory 59 by initialization processing or the like.

  Next, a second embodiment of the present invention will be described with reference to FIGS. However, the same configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed description thereof is omitted. The combine 1 of the second embodiment is provided with a dedicated switch for switching between the vehicle speed tuning control mode and the constant speed drive control mode and a dedicated switch for shifting the set speed of the constant speed drive control mode. It is different from the one. The configuration will be described in detail below.

  As shown in FIG. 10, in the control unit 60 of the second embodiment, in addition to input / output devices connected to the control unit 52 of the first embodiment, conveyance tuning for switching between the vehicle speed tuning control mode and the constant speed drive control mode. A switch 61, a manual switch 62 for shifting the set speed in the constant speed drive control mode, and a tuning lamp 63 that is turned on during vehicle speed tuning control are connected. As shown in FIG. 11, in the conveyance control executed by the control unit 60, first, it is determined whether the conveyance tuning switch 61 is ON or OFF. If this is ON, the tuning lamp 63 is turned on and the vehicle speed tuning control routine is performed. Execute. The control content of the vehicle speed tuning routine is the same as that of the first embodiment.

  On the other hand, when the conveyance synchronization switch 61 is OFF, the synchronization lamp 63 is turned off, and then it is determined whether the work machine clutch 42 is on or off. If this is off, the preprocessing continuously variable transmission 31 is driven. On the other hand, when the work implement clutch 42 is engaged, the operation of the manual switch 62 is determined. Here, when the manual switch 62 is in a non-operating state, backup processing described later is performed, and ON / OFF of the overturning switch 51 is determined. When the lodging trimming switch 51 is OFF, the preprocessing continuously variable transmission 31 is driven at a constant speed, while when the lodging trimming switch 51 is ON, the preprocessing continuously variable transmission 31 is tilted down. It is driven at a constant speed at a cutting speed (for example, set speed × 1.2). On the other hand, when the manual switch 62 is operated, the drive speed of the preprocessing continuously variable transmission 31 is increased or decreased according to the speed increasing operation or the speed decreasing operation of the manual switch 62. The set speed changed by this operation is backed up in the nonvolatile memory 59 as in the case of the first embodiment.

  In the second embodiment configured as described above, substantially the same effect as the first embodiment can be obtained. Moreover, in the second embodiment, since the transfer control mode is switched and the set speed change in the constant speed drive control mode is performed with the dedicated operation tool, the function of the operation tool is clearer than when the existing operation tool is also used. Thus, there is an advantage that erroneous operation can be prevented.

  Further, in the constant speed driving mode, the driving of the preprocessing unit 2 is allowed even in the travel stop state. Therefore, when the stems are cut off at low speed traveling, the preprocessing unit 2 is driven in advance before starting the traveling. Is possible. Thereby, the driving delay of the preprocessing unit 2 at the time of cutting at low speed can be avoided, and the cutting loss of the preprocessing unit 2 can be prevented, and as a result, the complete lodging material can be cut by ultra low speed driving.

It is a side view of a combine. It is a top view of a combine. It is explanatory drawing which shows the transmission structure of a combine. It is a perspective view of an operation part. It is a perspective view of a steering lever. (A) is a principal part front view of a main transmission lever, (B) is a principal part side view of a main transmission lever. It is a block diagram which shows the input / output of a control part. It is a flowchart which shows the control procedure of a control part. It is explanatory drawing which shows the effect | action of a vehicle speed tuning control mode and a constant speed drive control mode. It is a block diagram which shows the input / output of the control part in 2nd embodiment. It is a flowchart which shows the control procedure of the control part in 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 2 Preprocessing part 3 Threshing part 6 Operation part 7 Traveling part 10 Threshing feed chain 23 Gear case 31 Continuously variable transmission 43 for preprocessing Driver's seat 44 Steering lever 45 Steering switch 46 Cutting height release switch 47 Horn switch 48 Main Shift lever 49 Sub shift lever 50 Forced take-in switch 51 Overturn cut switch 52 Control unit 59 Non-volatile memory 60 Control unit 61 Conveyance tuning switch 62 Manual switch

Claims (3)

  In a combine provided with a pedicle conveyance control unit that controls the shoot conveyance speed, the shoot conveyance control unit includes a vehicle speed synchronization control mode for changing the pedicle conveyance speed according to a vehicle speed, and the shoot conveyance speed. A combine comprising: a constant speed drive control mode that maintains a set speed regardless of a vehicle speed and changes the set speed in accordance with a predetermined operation.   The combine according to claim 1, wherein the stalk conveyance control unit changes a set speed of the constant speed drive control mode according to an operation of an existing operation tool provided on the steering lever.   The combine according to claim 1, wherein the stalk conveyance control unit changes a set speed of the constant speed drive control mode according to an operation of a dedicated operation tool.

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