JP2006223132A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply release firm clogging phenomena of grain straws occurring at the joint parts of a conveying chain at right and left plant foot sides positioned appropriately at the center of a pretreatment part. <P>SOLUTION: The combine harvester is equipped with a normal/reverse rotation drive control means 98 for automatically driving the normal/reserve rotation of the pretreatment part 14 based on the ON operation of a normal/reserve rotation switch 92 being a manual operation tool. During the ON operation of the normal/reverse rotation switch 92, the pretreatment part 14 is repeatedly driven in normal/reserve rotation. The normal/reverse rotation drive of the pretreatment part 14 is driven in a normal rotation for a fixed time and is completed by changing the normal/reverse rotation switch 92 from ON to OFF. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an improvement in forward / reverse drive means in a pre-processing section of a combine that conveys cereals harvested by a cutting blade toward a threshing section.

Conventionally, in a combine provided with a pretreatment unit (reaping unit) that conveys to the threshing unit while harvesting cereals caused by the pulling device with a cutting blade, an accident such as clogging of the cereal has occurred in the conveyance system of the pretreatment unit In this case, the pre-processing in which the power of the engine is input in order to facilitate the removal work and cleaning by moving the stuffed cereals in the reverse conveying direction by driving the entire drive system of the pre-processing unit in the reverse direction. (Mowing) A forward / reverse clutch is provided on the input shaft, an operation tool for selectively engaging and operating the forward / reverse clutch is provided, and a one-way clutch is provided on the drive shaft of the pulling device to There is known a configuration in which the reverse rotation of only the pulling device is stopped during the reverse rotation drive, and the tine is caused to collide with the tine guide and is damaged by the reverse rotation drive of the preprocessing unit (for example, Patent Documents). 1).
Japanese Patent Laid-Open No. 10-75620 (page 3-4, FIG. 1)

  And in the above-mentioned conventional one, when clogging of cereals occurs in the transport system of the preprocessing unit, the preprocessing is instantaneously performed by operating an operating tool that selectively engages and operates the forward / reverse clutch. The entire drive system of the head is driven in reverse to move the stuffed cereals in the reverse transport direction. A strong cereal clogging phenomenon tends to occur at the junction of the left and right stocker-side transfer chains located in the center, and this strong cereal clogging phenomenon can be easily achieved by reversing the entire drive system of the pretreatment unit. It was difficult to release by the method.

  An object of the present invention is to solve the above-described problem, and in a combine including a pre-processing unit that conveys the harvested cereal toward the threshing unit, the automatic operation is performed based on the operation of the manual operation tool. The first feature is that forward / reverse drive control means for forward / reversely driving the preprocessing unit is provided.

  A second feature is that after the forward / reverse driving, the pre-processing unit is driven to rotate forward for a predetermined time.

  A third feature is that the forward / reverse drive of the preprocessing unit is started from the reverse drive.

  The fourth feature is that the pre-processing unit is driven forward and reverse through the HST.

  According to the first aspect of the present invention, by providing the forward / reverse drive control means for automatically driving the pre-processing part forward / reversely based on the operation of the manual operation tool, When a strong cereal clogging phenomenon occurs at the junction of the left and right stocker-side transfer chains located at the approximate center of the pretreatment unit, the pretreatment unit is automatically operated by operating the manual operation tool. Can be driven forward and backward, thereby efficiently releasing the clogging phenomenon of strong cereals.

  According to the second aspect of the present invention, after the forward / reverse driving is performed, the preprocessing unit is configured to drive the normal rotation for a predetermined time and finish, so that the clogging phenomenon occurs in each cereal conveying device of the preprocessing unit. After carrying out the threshing process by transporting the released cereal meal to the threshing section, the threshing waste after the threshing can be quickly discharged from the post-processing section.

  According to the invention of claim 3, by starting the forward / reverse rotation drive of the pretreatment unit from the reverse rotation drive, the pretreatment unit is driven in the direction to first release the strong clogging phenomenon, so that smooth and efficient It becomes possible to cancel the clogging phenomenon of cereals.

  According to the invention of claim 4, since the pre-processing unit is driven forward / reversely via the HST, it is not necessary to provide a special forward / reverse mechanism as in the prior art, and the cost can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a combine 10, and FIG. 2 is a plan view. The combine 10 supports a body frame 12 on a pair of left and right crawler traveling devices 11, and a grain is placed in front of the body frame 12. A pre-processing unit 14 that conveys the cocoon to the threshing unit 13 is provided. In addition, a control unit 16 including a driver's seat 15 on which an operator is seated and various operation tools is arranged on the front right side on the machine body frame 12, and the rear side and the side of the threshing unit 13 have been selected. A grain tank 17 for temporarily storing the grains is provided.

  A relay conveyance device 19 is provided on the left side of the driver's seat 15 to convey the cereals harvested by the cutting blade 18 to the threshing unit 13, and on the left side of the threshing unit 13, the cereals are not shown. A feed chain 21 is provided to supply the chamber.

  In more detail, the pre-processing unit 14 cuts the culm that has been caused by the pulling device 22 from the culm in the field with the cutting blade 18, and sends the cereal that has been harvested to the rear while stirring the star wheel 23, and There are provided a scratching belt 24 with a locking claw that rotates integrally with the star wheel 23, a relay transport device 19 and a pre-processing transport device 25 for transporting the cereals fed from the star wheel 23 and the scraping belt 24.

  Then, the pretreatment transport device 25 inherits and conveys the left side stock-side transport chain 26 </ b> L that inherits and transports the stock side of the grain straw sent from the star wheel 23, and the tip side of the grain seed sent from the stir belt 24. It is comprised by the tip side conveyance body 27 to do.

  The tip side transport body 27 is composed of a tine-attached transport chain having a tine 28 that can be raised and lowered for transporting cereals attached to the chain. The tine 28 is pulled up, and the tip side of the cereal is locked to the tine 28 so as to be conveyed backward.

  In addition, the merging portion A of the left stocker-side conveying chain 26L constituting the pretreatment conveying device 25 is located in the approximate center of the preprocessing portion 14, and the merging is performed in the cutting work such as long culm and fallen cereal culm. Since the clogging phenomenon of strong cereals easily occurs in the part A, when this cereal clogging occurs, it takes a lot of time for the removal work and cleaning.

  In addition, the pulling device 22 includes a tine 29 that can be raised and lowered attached to a transport chain 86 (see FIG. 3) that rotates in the vertical direction. By the rotation of the transport chain 86 in the pulling-up direction in the pulling action portion of the cereal. The tine 29 is pulled up through a guide (not shown), and the grain candy is locked to the tine 29 and pulled up.

  In addition, the relay transfer device 19 inherits the tip side from the stock side side transfer chain 26R that inherits and transfers the strain source side of the cereals sent from the star wheel 23, and the tip side transport body 27 of the pretreatment transfer device 25. Inheriting the stock side of the cereal from the relay tip transport body 32 made of a chain provided with a tine 31 that can be raised and lowered to the threshing section 13 side and the stock source side transport chain 26L on the left side of the pretreatment transport device 25 A handling depth conveying device 33 that adjusts the handling depth while swinging up and down, and a relay stock source conveying chain 34 that inherits the stock side of the cereal from the handling depth conveying device 33 and conveys it to the feed chain 21 are provided. .

  Then, the cereals conveyed to the feed chain 21 are supplied to a handling room (not shown) to thresh the grains, and the sorted grains are temporarily stored in the grain tank 17, whereby the series by the combine 10. The harvesting and threshing of cereal grains can be performed.

  3 shows the pulling device 22, the cutting blade 18, the star wheel 23, the scraping belt 24, the stock source side transport chains 26L and 26R, the tip side transport body 27, the handling depth transport device 33, and the relay tip transport body. 32 is a drive system transmission diagram of the preprocessing unit 14 such as the relay stock former transfer chain 34 and the feed chain 21, and the engine power is input to the gear case 42 via the input pulley 41 and input to the gear case 42. The power is shifted by a HST (hydraulic continuously variable transmission) 43 (for pretreatment) and then output to the feed chain drive shaft 44 and the pretreatment drive shaft 45. It should be noted that the grain speed at the pre-processing unit 14 is proportional to the vehicle speed tuning control mode that changes proportionally according to the vehicle speed, that is, when the rotational speed of the traveling HST (not shown) increases (for pre-processing). Normal mowing work is performed under the control of increasing the size.

  The driving force output to the feed chain drive shaft 44 is transmitted to the feed chain 21, and the driving force output to the pretreatment drive shaft 45 is transferred to the shaft 51 via the pulley 47, the belt 48, and the pulley 49. Then, the shaft 51 is transmitted to the shaft 53 through the bevel gear 52. A belt tension type mowing clutch 50 is provided between the pulley 47 and the pulley 49. Further, the driving force transmitted to the shaft 53 is transmitted to the shaft 55 via a bevel gear 54 provided in the middle of the shaft 53, and then transmitted to the shaft 57 via a bevel gear 56. The driving force transmitted to the shaft 57 is directly transmitted to the relay stock source transport chain 34 and the relay tip transport body 32.

  Further, the driving force transmitted to the shaft 53 as described above is also transmitted to the shaft 61 via the bevel gear 59. The driving force transmitted to the shaft 61 is transmitted to the handling depth conveying device 33 via the bevel gear 62, the shaft 63, the bevel gear 64, and the shaft 65. The driving force transmitted to the shaft 61 is directly transmitted to one (right side) stocker-side transport chain 26R, and the driving force transmitted to the stocker-side transport chain 26R is applied to one star wheel. The pair of star wheels 23 and 23 and the scraping belts 24 and 24 are driven by the driving force transmitted to the support shaft 66.

  Further, the driving force transmitted to the shaft 53 is also transmitted to the shaft 68 via the bevel gear 67 and also transmitted to the cutting blade 18 via bevel gears 69 provided at both ends of the shaft 68. The driving force transmitted to the shaft 68 is transmitted to the shaft 72 via the bevel gear 71 and then transmitted from the shaft 72 to the shaft 76 via the bevel gear 73, the shaft 74, and the bevel gear 75.

  The driving force transmitted to the shaft 76 is directly transmitted to the other (left side) stock-source-side transport chain 26L and the tip-side transport body 27. Further, the driving force transmitted to the tip side carrier 27 is also transmitted to the support (transmission) shaft 78 of the other star wheel 23, and one set (left side) of the star wheels 23 is transmitted by the driving force transmitted to the support shaft 78. , 23 and the scraping belts 24, 24 are driven.

  Further, the driving force transmitted to the shaft 72 described above is transmitted to a gear case 79 including a transmission gear, and after being shifted in the gear case 79, is output from the output shaft 81. The driving force of the output shaft 81 is transmitted to the driving shaft 83 of the pulling device 22 via the bevel gear 82, and then the driving force is applied to each conveyance chain 86 of the pulling device 22 from the plurality of bevel gears 84 disposed on the driving shaft 83. Is transmitted.

  Further, the gear case 79 is provided with a pulling clutch 87, and the pulling clutch 87 can perform a multi-stage shifting operation including a neutral position. That is, the gear case 79 is provided with a speed change arm 88 for performing the multi-stage speed change operation. One end of the speed change arm 88 is connected to the cylinder rod 89a of the electric cylinder 89 and is connected to the electric cylinder 89. By operating the cylinder rod 89a to expand and contract via the changeover switch 91, a high / low speed two-stage shift operation including a neutral position is performed.

  The electric cylinder 89 is connected with a forward / reverse switch 92 as a manual operation tool for driving the preprocessing unit 14 in the forward / reverse direction. The forward / reverse switch 92 is disposed on the operation panel 93 on the left front side of the control unit 16 (see FIG. 2), and is linked to the ON / OFF operation of the forward / reverse switch 92 to provide a cylinder rod 89a of the electric cylinder 89. Will extend and contract. That is, the speed change arm 88 of the pulling clutch 87 is moved to the neutral position by turning on the forward / reverse rotation switch 92, while the high / low speed two-stage of the pulling clutch 87 is turned on by turning the forward / reverse rotation switch 92 off. Returning operation to any one of the preset shift arm 88 positions is performed.

  Therefore, when the pulling clutch 87 is in the neutral position, the conveying chain 86 of each pulling device 22 is not driven, and the pulling clutch 87 acts as a transmission / disconnection means for connecting / disconnecting the transmission of the driving force to the pulling device 22. To do.

  The forward / reverse switch 92 is connected to an HST transmission motor 96 which is a swash plate control motor for controlling the swash plate angle of the HST pump (swash plate type variable displacement hydraulic pump) 43a of the HST 43 described above. When the forward / reverse switch 92 is turned on, the output rotation direction is forward / reversely rotated. On the other hand, when the forward / reverse switch 92 is turned off, the output rotation direction and the rotational speed of the HST 43 are in the state before the forward / reverse rotation. It is set to return to.

  When the HST 43 is reversely rotated, the driving force output from the feed chain drive shaft 44 and the pretreatment drive shaft 45 is reversely rotated, whereby the feed chain 21, the star wheel 23, and the scraper constituting the pretreatment unit 14 are scraped. The belt 24, the left and right stocker side transport chains 26L and 26R, the tip side transport body 27, the relay tip transport body 32, the handling depth transport device 33, and the relay stock source transport chain 34 are driven in reverse.

  More specifically, the combine 10 is configured so that the cereal conveying devices 23, 24, 26L, 26R, 27, 32, 33, and the like constituting the conveying system of the preprocessing unit 14 by the ON / OFF operation of the forward / reverse rotation switch 92 described above. 34, and a forward / reverse drive control means for forward / reversely driving the feed chain 21 and the like are provided as shown in FIG. 4. Hereinafter, forward / reverse drive control of the preprocessing unit 14 by the controller 98 will be described.

  The control unit 98 is a control unit configured by using a microcomputer including a CPU, a ROM, a RAM, and the like, and a main transmission lever that detects the operation position of the forward / reverse rotation switch 92 and the main transmission lever 101 on the input side. A potentiometer 102, a cutting clutch detection switch 104 for detecting the tilting operation of the cutting clutch 50 by the cutting / threshing clutch lever 103, and a shaft 51 of the shaft 51 for detecting the forward / reverse rotation speed of the preprocessing unit 14. The pre-processing unit rotation sensor 105 is connected, and an HST transmission motor 96 is connected to the output side.

  Next, the forward / reverse drive control of the preprocessing unit 14 by the control unit 98 will be described based on the flowchart shown in FIG. 5 which is the first embodiment. In this flowchart, when the operator of the combine 10 confirms (views) the clogging of the cereal in the transport system of the preprocessing unit 14, the traveling of the combine 10 is stopped (the preprocessing unit 14). The above-mentioned forward / reverse switch 92 is turned ON to turn on the cereal conveying devices 23, 24, 26L, 26R, 27, 32, 33, and 34 constituting the conveying system of the preprocessing unit 14. This is a control flow for forward / reverse rotation, and is intended to cancel the clogging phenomenon of cereals by forward / reverse rotation of the preprocessing unit 14.

  First, in step S1 shown in FIG. 5, it is determined whether or not the forward / reverse rotation switch 92 is ON. If YES, the process proceeds to step S2, and if NO, that is, OFF, the original process is returned.

  In step S2, it is determined by the main transmission lever potentiometer 102 whether or not the main transmission lever 101 is in the neutral position. If YES, that is, if the running is stopped, the process proceeds to step S3, and if NO, the process returns to the original.

  In step S3, it is determined whether or not the mowing / threshing clutch lever 103 is tilted to the entry side and the mowing clutch switch 104 is turned on. If YES, the process proceeds to step S4. If NO, the process returns to the original. .

  In step S4, the HST speed change motor 96 is output in reverse rotation, and the process proceeds to step S5.

  In step S5, for example, whether or not the right stocker-side transport chain 26R has been reversely moved by the set distance Ya based on the number of rotations of the preprocessing unit rotation sensor 105 that detects the number of forward / reverse rotations of the preprocessing unit 14. If NO, the process proceeds to step S6, and if YES, the process proceeds to step S7.

  In step S6, it is determined whether or not the reverse drive output of the HST transmission motor 96 has been made for a set time Ta. If NO, the process returns to step S4, and if YES, the process proceeds to step S7.

  In step S7, the HST speed change motor 96 is forward driven and output, and the process proceeds to step S8.

  In step S8, for example, whether or not the right stocker side transport chain 26R has moved forward by the set distance Yb is determined based on the number of rotations of the preprocessing unit rotation sensor 105 that detects the number of forward and reverse rotations of the preprocessing unit 14. If NO, the process proceeds to step S9. If YES, the process returns to the original.

  In step S9, it is determined whether or not the forward drive output of the HST transmission motor 96 has been made for the set time Tb. If NO, the process returns to step S7, and if YES, the original control is executed.

  That is, in the forward / reverse drive control of the preprocessing unit 14 shown in steps S1 to S9 described above, the preprocessing unit 14 is automatically moved forward / reversely by turning on the forward / reverse rotation switch 92 which is a manual operation tool. Since the forward / reverse drive control means 98 for driving is provided, when performing a cutting operation such as a long rice cake or an overturned grain rice cake, a joining portion of the left and right stocker side transfer chains 26L and 26R located substantially in the center of the preprocessing portion 14 Even if a strong cereal clogging phenomenon occurs due to A or the like, the pre-processing unit 14 can be automatically driven forward / reversely based on a single ON operation of the forward / reverse switch 92, thereby efficiently It becomes possible to cancel the phenomenon of strong cereal clogging.

  Furthermore, by starting the forward / reverse rotation drive of the pre-processing unit 14 from the reverse rotation driving, the pre-processing unit 14 is driven in the direction to first release the strong clogging phenomenon of the cereal, so that the cereal can be smoothly and efficiently performed. It becomes possible to release the clogging phenomenon.

  In step S5, if the stock-side transport chain 26R does not move backward as much as the set distance Ya, that is, if the clogging phenomenon of the cereal is not quickly released even if the HST transmission motor 96 is driven to rotate backward, the process goes to step S6. It is configured so that the reverse drive output for the set time Ta or longer is not performed so that even if an extremely strong cereal clogging phenomenon occurs, the reverse drive that is subjected to an excessive load is continued. There is no. Similarly, in step S8 to step S9, when the stock source side transfer chain 26R does not move forward by the set distance Yb, a safety measure is adopted so that the forward drive output for the set time Tb or more is not performed. ing.

  In addition, by setting the relationship between the set value Ya of the reverse movement distance of the stocker-side transport chain 26R in step S5 and the set value Yb of the forward movement distance of the stocker-side transport chain 26R in step S8, Yb> Ya When the cereal clogging phenomenon occurs in each of the cereal conveying devices 23, 24, 26L, 26R, 27, 32, 33, and 34 constituting the cereal conveying system of the preprocessing unit 14, the preprocessing unit 14 It becomes possible to avoid breakage of the cereal conveying devices 23, 24, 26L, 26R, 27, 32, 33, and 34 due to unnecessary (excessive) reverse driving. The set value Ya of the reverse movement distance of the stocker-side transport chain 26R and the set value Yb of the forward movement distance of the stocker-side transport chain 26R are both set as the normal output setting time Tb and the reverse output setting time. Instead of Ta, Tb> Ta may be satisfied.

  Then, the forward / reverse switch 92 is turned ON / OFF while determining the release state of the cereal clogging phenomenon in each cereal conveying device 23, 24, 26L, 26R, 27, 32, 33, 34 of the preprocessing unit 14. It is possible to cancel the clogging phenomenon of cereals efficiently.

  Further, by setting the output setting time Ta for driving the HST speed change motor 96 in the reverse direction to be shorter, for example, it is possible to control so that the substantial reverse movement amount of the tine 29 of the pulling device 22 constituting the preprocessing unit 14 is reduced. Thus, the tine 29 can be prevented from colliding with and being damaged by the tine guide, thereby eliminating the need for interposing a one-way clutch on the drive shaft of the pulling device 22 as in the prior art. It is also possible to plan.

By the way, when the pulling clutch 87 that can selectively stop the driving of the conveying chain 86 of the pulling device 22 is provided as in the present embodiment, the pulling device 22 is stopped by stopping the driving of the conveying chain 86 of the pulling device 22. Tine 29 collides with the tine guide and is not damaged, so that the cereal conveying devices 23, 24, 26L, 26R, 27, 32, 33, and 34 of the other pre-processing units 14 are driven forward and backward. The relationship between the reverse rotation output setting time Ta and the normal rotation output setting time Tb of the HST transmission motor 96 may be configured such that Ta = Tb or Ta> Tb.

Next, a second embodiment of forward / reverse drive control of the preprocessing unit 14 by the control unit 98 will be described based on the flowchart shown in FIG. In this flowchart, as in the first embodiment, when the operator of the combine 10 confirms (views) the clogging of the cereal in the transport system of the preprocessing unit 14, the travel of the combine 10 is stopped. In this state, the above-described forward / reverse switch 92 is turned ON to control forward / reverse rotation of the cereal conveyor devices 23, 24, 26L, 26R, 27, 32, 33, and 34 constituting the conveyor system of the preprocessing unit 14. In this control flow, the cereal clogging phenomenon is canceled by forward / reverse rotation of the pre-processing unit 14, and the cereals released from the clogging phenomenon are conveyed to the threshing unit 13 for threshing and then threshing It is intended to quickly discharge the discharged waste from the post-processing unit (not shown).

  First, in step S1 shown in FIG. 6, it is determined whether or not the forward / reverse rotation switch 92 was turned off last time. If YES, the process proceeds to step S2, and if NO, the process returns to the original.

  In step S2, it is determined whether or not the forward / reverse switch 92 has been turned ON this time. If YES, the process proceeds to step S3, and if NO, the process returns to the original.

  In step S3, it is determined by the main transmission lever potentiometer 102 whether or not the main transmission lever 101 is in the neutral position. If YES, that is, if the travel is stopped, the process proceeds to step S4, and if NO, the process returns to the original.

  In step S4, it is determined whether or not the mowing / threshing clutch lever 103 is tilted to the entry side and the mowing clutch switch 104 is turned on. If YES, the process proceeds to step S5. If NO, the process returns to the original. .

  In step S5, the HST speed change motor 96 is forward / reverse drive output and the process proceeds to step S6. Note that the forward / reverse drive time of the HST transmission motor 96, that is, the output time for forward / reverse rotation of the HST transmission motor 96, is set so that forward rotation> reverse rotation, thereby making the preprocessing unit 14 unnecessary (excessive). While avoiding damage to each of the cereal conveying devices 23, 23, 24, 26L, 26R, 27, 32, 33, and 34 by reverse driving, the clogging phenomenon of the cereals can be efficiently released.

  In step S6, it is determined whether or not the forward / reverse drive output of the HST transmission motor 96 has been repeated a predetermined number of times K. YES, i.e., the cereal clogging phenomenon is canceled by the forward / reverse drive of the preprocessing unit 14. In a state where it is done, the process proceeds to step S7, and if NO, the process returns to step S5.

  In step S7, control is performed in which the forward drive output of the HST transmission motor 96 is given for a predetermined time. That is, according to the forward / reverse drive control of the preprocessing unit 14 shown in step S1 to step S7, after the cereals released from the clogging phenomenon are transported to the threshing unit 13 and threshing processing is performed, A series of controls for quickly discharging the soot from a post-processing unit (not shown) can be executed.

  In the first embodiment and the second embodiment of the forward / reverse drive control of the pretreatment unit 14 described above, each cereal conveying device 23, 24, which constitutes the conventional conveyance system of the pretreatment unit 14, 26L, 26R, 27, 32, 33, and 34 are largely reversed to release the clogging phenomenon of strong cereals, thereby not removing the cereals and automatically reversing the forward and backward of a relatively short stroke. The cereals clogging phenomenon is released by repeating the process, and the cereals after the clogging phenomenon is further conveyed to the threshing unit 13 to perform the threshing process. It is intended to enable quick discharge from (not shown).

  Further, since the forward / reverse drive of the pre-processing unit 14 described above is performed via an HST transmission motor 96 which is a swash plate control motor for controlling the swash plate angle of the HST pump 43a of the HST 43, a special forward rotation is performed as in the conventional case. There is no need to provide a reverse clutch or operation tool, and costs can be reduced. The forward / reverse control pattern of the pre-processing unit 14 is not limited to a repetitive pattern in which the reverse rotation / forward rotation is one cycle, but for example, the reverse rotation / reverse rotation / forward rotation having different driving times is set to one cycle. Various forward and reverse control patterns can be configured.

  Further, the camshaft (not shown) or the rotational force as reverse input blocking means is applied to the support shafts 68 and 78 of the star wheel 23 which are fed backward while scraping the stock of the cereal after cutting. Can be transmitted only from the side to the output shaft side, but when the star wheel 23 is clogged with cranches by interposing clutch means etc. that cannot transmit rotational force in the opposite direction, The free rotation of the star wheel 23 in the forward / reverse direction may be enabled to facilitate the removal of the stuffed cereal.

The side view of a combine. The top view of a combine. The block diagram of a control part. The side view of a drive sprocket. The flowchart which shows the 1st Example of the forward / reverse drive control of a pre-processing part. The flowchart which shows the 2nd Example of forward / reverse drive control of a pre-processing part.

Explanation of symbols

13 Threshing unit 14 Pretreatment unit 43 HST
92 Manual operating tool 98 Forward / reverse drive control means

Claims (4)

  In a combine equipped with a pre-processing unit (14) that conveys the harvested cereal toward the threshing unit (13), the pre-processing unit (14) is automatically rotated forward and backward based on the operation of the manual operation tool (92). A combine comprising a forward / reverse drive control means (98) for driving.   The combine according to claim 1, wherein after the forward / reverse drive, the pre-processing unit (14) is configured to forward drive for a predetermined time and end.   The combine according to claim 1 or 2, wherein the forward / reverse drive of the preprocessing unit (14) is started from the reverse drive.   The combine according to any one of claims 1 to 3, wherein the pre-processing unit (14) is driven forward and reverse through the HST (43).

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