JP2012095660A - Preprocessing drive device in combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a preprocessing drive device in a combine harvester, accurately performing interlocking between drive speeds of a preprocessing part and a travel device.SOLUTION: A speed interlocking means changing the drive speed of the preprocessing part 17 in the combine harvester branching output from an engine 1 into the preprocessing part 17, and a work machine transmission system including a threshing cylinder 6 and a threshing feed chain 18 interlockingly with a travel speed includes: an actuator 39 performing a speed change operation of a preprocessing speed changer 14 for preprocessing part drive; a travel rotation sensor 36 detecting the drive speed after a speed change of a travel transmission 8 for travel device drive; and a controller 38 controlling the actuator 39 based on information of the travel rotation sensor 36 to drive the preprocessing part 17 correspondingly to the travel speed.

Description

  The present invention relates to a preprocessing drive device for a combine.

  As a pre-processing drive device in a conventional combine, the output from the engine is branched into a travel transmission system and a pre-processing transmission system to the pre-processing unit including the cereal conveyance, a traveling transmission for driving the traveling device, and a pre-processing unit A drive preprocessing transmission is provided, and speed interlocking means for changing the driving speed of the preprocessing unit in conjunction with the traveling speed is known.

  However, since the speed interlocking means mechanically interlocks the two transmissions, there is a drawback in that the interlocking of the driving speed between the preprocessing unit and the traveling device may be inaccurate.

In order to solve the above-described problems, the pretreatment drive device in the combine of the present invention outputs the output from the engine 1 to the traveling transmission system, the preprocessing unit 17, the handling cylinder 6, and the work machine transmission system including the threshing feed chain 18. The travel transmission 8 for driving the travel device and the pre-processing transmission 14 for driving the pre-processing unit are provided, and the driving speed of the pre-processing unit 17 is increased so that the driving speed increases. In the pre-processing drive device provided with the speed interlocking means that can be changed by the above-mentioned, the speed interlocking means detects the driving speed after the shift of the travel transmission 8 and the actuator 39 that shifts the pre-processing transmission 14. 36 and a control device 38 that controls the actuator 39 based on the information of the travel rotation sensor 36 so as to drive the preprocessing unit 17 in accordance with the travel speed. In addition, the threshing feed chain 18 is driven by the pre-processing transmission 14 that drives the pre-processing unit 17, and the control device 38 detects the height of the pre-processing unit 17. When it is detected that the pre-processing unit 17 has been raised to a predetermined height, the actuator 39 is controlled to shift so that the pre-processing unit 17 and the threshing feed chain 18 are driven and stopped together. Is the first feature.
Further, a threshing clutch 12 for connecting and disconnecting the transmission from the engine 1 to the work machine transmission system is provided, the work machine transmission system is branched on the lower transmission side of the threshing clutch 12, and the branch transmission system is transmitted to the preprocessing transmission 14. Before being connected to the transmission system from the preprocessing transmission 14 to the preprocessing unit 17 and to the transmission system to the threshing feed chain 18 and before connecting the transmission from the preprocessing transmission 14 to the preprocessing unit 17 The second feature is that the processing clutch 31 is provided.

According to the structure of the present invention configured as described above, since the pre-processing unit (including the cereal conveyance) is driven at a speed synchronized with the traveling speed, the pre-processing is synchronized with the change in the traveling speed. The part is driven, and the cereal conveying part of the pre-processing part conveys the cereal to the threshing part side, and the cereal is stably conveyed regardless of the running speed, and there is an effect that conveyance disturbance and the like are prevented.
In particular, the speed linking means includes an actuator for shifting the preprocessing transmission, a travel rotation sensor for detecting the drive speed after the shift of the travel transmission, and a control device for controlling the actuator based on information of the travel rotation sensor. In the case of controlling the driving speed of the pre-processing unit by electronic control, the control mechanism can be simply configured, and a hydraulic continuously variable transmission (HST) can be easily adopted and the traveling speed can be increased. On the other hand, there is an advantage that a mechanism with good followability can be easily provided.
Also, for example, when the pretreatment unit is raised during turning, for example, when turning, the automatic stop function is activated by raising the pretreatment unit to a predetermined height, and the drive of the pretreatment unit and the threshing feed chain is stopped. For this reason, no waste is discharged. For this reason, a straw or the like is not dropped at the turning place, and inconveniences such as the aircraft stepping on the straw when turning are prevented. At this time, as described above, the driving of the pretreatment unit and the threshing feed chain is stopped in synchronization, so that the conveyance disturbance and clogging of the cereals are prevented.

It is a power transmission diagram of a combine. It is a plane sectional view of a work machine transmission. It is a front view of a work machine transmission. It is a block diagram of a microcomputer unit part. It is a graph which shows the relationship between driving speed and pre-processing drive speed. It is a graph which shows the relationship between the travel speed of the state which act | operated the speed maintenance cancellation function, and pre-processing drive speed. It is a graph which shows the relationship between the travel speed of the state which actuated the speed increase function, and pre-processing drive speed. It is a top view of a pre-processing speed change dial switch. It is a graph which shows the relationship between the running speed at the time of operating a speed change function, and a pre-processing drive speed. It is a side view of the front-end part of a feed chain. It is a graph which shows the relationship between the running speed of the state which act | operated the handling speed raising function, and pre-processing drive speed.

  FIG. 1 is a transmission system diagram of a combine that employs a cereal conveying power transmission device in a combine according to the present invention. Two pulleys 2 and 3 for taking out an output are attached to a drive shaft (output shaft) 1a of an engine 1. Yes. The driving force from the engine 1 is transmitted to the HST 4 as a traveling hydraulic transmission device as a traveling transmission system via the pulley 2, and the handling cylinder capable of transmitting the driving force to the handling cylinder 6 as a work machine transmission system via the pulley 3. Each is branched and output to the input shaft 7.

  Then, the driving force for the left and right traveling devices is output from the transmission for traveling transmission (traveling transmission) 8 provided with the traveling HST 4 so that the left and right traveling devices are driven at a variable speed, and the vehicle is driven at a variable speed. It has a structure.

  On the other hand, a driving force transmission belt 11 is wound between a pulley 3 on the engine 1 side and a pulley 9 attached to the barrel input shaft 7, and a tension clutch is disposed on the belt 11 side as a threshing clutch. 12 is provided. That is, the driving force is transmitted from the engine 1 to the work machine transmission system via the threshing clutch 12 so as to be freely connected and disconnected.

  The driving force of the work machine transmission system that is input to the handling cylinder input shaft 7 via the threshing clutch 12 is transmitted through the pulley 13 attached to the handling cylinder input shaft 7 (work machine transmission). 14 is transmitted to a work machine HST16 (input pulley 15 of the work machine HST16), which is a hydraulic power transmission device provided in 14, and is transmitted from the work machine transmission 14 to the pretreatment unit 17 in the combine and to the threshing feed chain 18. The transmission system of is branched and output.

  At this time, the work machine transmission 14 has two output shafts, a preprocessing output shaft 19 for driving force output to the preprocessing portion 17 and a feed chain output shaft 21 for driving force output to the threshing feed chain 18. The threshing feed chain 18 is driven by a sprocket 22 provided on the end side of the feed chain output shaft 21. The handling cylinder 6 is driven by a driving force input directly from the handling cylinder input shaft 7 via the bevel gear 23 (without the transmission).

  In other words, the work machine transmission system includes a transmission system to the threshing unit 24 (transmission of driving force to the barrel 6 and the threshing feed chain 18), and the transmission of driving force to the threshing unit 24 is driven to the work machine transmission 14. Along with the transmission of force, the threshing clutch 12 provided on the upstream side of the transmission to the work machine transmission 14 in the work machine transmission system is connected and disconnected.

  On the other hand, the pre-processing unit 17 includes a cereal reaping device (cutter) 41, a pulling device 42, a cereal conveying device such as a star wheel and a handling depth conveying body 43, and the like. For transmission, a belt 29 for transmission wound around a pulley 27 attached to the input shaft 26 of the driving force on the preprocessing unit 17 side and a pulley 28 attached to the preprocessing output shaft 19 is used. Done through.

  The pre-processing unit 17 has a structure in which each of the mechanisms is driven at a driving speed corresponding to the rotational speed (speed) of the driving force by the driving force input to the input shaft 26 as in the prior art. On the belt 29 side, a tension clutch that connects and disconnects transmission of driving force to the preprocessing unit 24 (input shaft 26) is provided as a preprocessing clutch 31.

  As described above, in the “disengaged” state of the pretreatment clutch 31, by operating the “threshing” clutch 12, driving force is input from the engine 1 to the barrel input shaft 7, and the pretreatment unit 17 remains stopped. Then, the barrel 6 and the threshing feed chain 18 are driven, and the pretreatment clutch 31 is further “engaged” to drive the driving force to the pretreatment portion 17 and the pretreatment portion 17 (each of the above mechanisms) is driven. The

  At this time, the work implement transmission 14 is configured integrally with the work implement HST16 as shown in FIGS. 2 and 3, and is structured to be shifted by the work implement HST16. The preprocessing output shaft 19 and the feed chain output shaft 21 are provided downstream (downstream) from the work machine HST16.

  That is, the work machine transmission 14 is supported by the preprocessing output shaft 19 while the gear G1 supported by the output shaft 16a of the work machine HST16 meshes with the gear G2 supported by the preprocessing output shaft 19. The gear G3 and the gear G4, which is rotatably supported by the output shaft 16a, are meshed with each other. The sprocket P1 and the feed chain output shaft, which are rotatably supported by the output shaft 16a and rotate together with the gear G4. 21 has a structure in which a sprocket P2 that is pivotally supported so as to rotate integrally with the shaft 21 is connected by transmission via a chain C.

  At this time, a torque limiter mechanism 20 is interposed between the feed chain output shaft 21 and the sprocket P2. As a result, the driving forces from the preprocessing output shaft 19 and the feed chain output shaft 21 are both shifted from the work machine HST16, that is, the drive speeds of the feed chain 18 and the preprocessing unit 17 are shifted in synchronization by the work machine HST16. In addition, since the driving force to the handling cylinder input shaft 7 is cut by operating the threshing clutch 12 to “cut”, none of the pretreatment unit 17, the handling cylinder 6, and the threshing feed chain 18 are stopped and driven.

  On the other hand, a driving force is input to the traveling HST 4 from the engine 1 side to the traveling HST 4, and the driving force changed by the traveling HST 4 is sub-shifted via the sub-transmission mechanism 32 provided on the traveling transmission 8 side. And output to the traveling device side.

  In other words, the main transmission lever 33 that operates the traveling HST4 to shift the output from the traveling HST4 and the auxiliary transmission lever (not shown) that operates the auxiliary transmission mechanism 32 are attached to the traveling transmission 8 side. The travel driving force toward the travel device is shifted by operating the lever 33 and the sub-shift lever, and the travel speed of the aircraft is changed.

  At this time, the sub-transmission mechanism 31 is attached with a sub-transmission output shaft 34 that outputs a sub-shifting driving force (driving force after a shifting operation). The rotation speed (traveling speed) of the auxiliary transmission output shaft 34 can be detected. The preprocessing output shaft 19 of the work machine transmission 14 is provided with a preprocessing rotation sensor 37 that detects the rotational speed of the preprocessing output shaft 19 (driving speed of the preprocessing unit 17).

  Further, on the side of the shift trunnion shaft (not shown) of the work machine HST14, as shown in FIG. 1, the trunnion shaft (swash plate angle of the work machine HST14) is operated to change the speed of the work machine HST14. An actuator (motor) 39 is integrally attached to the work machine HST14. Further, as shown in FIG. 4, both the rotation sensors 36 and 37 are input to the microcomputer unit 38 which is a control device, and a motor 39 is connected to the output side of the microcomputer unit 38.

  The microcomputer unit 38 controls the motor 39 based on the information from the both rotation sensors 36 and 37, and the preprocessing unit 17 (preprocessing output shaft 19) and the threshing feed chain 18 (feed chain output shaft 21). The driving speed is synchronized, and the driving speed of the pre-processing unit 17 is automatically shifted in association with (synchronized with) the traveling speed.

  This means that during work traveling, the amount of harvested cereal per unit time is increased or decreased corresponding to the traveling speed, and the amount of cereal to be processed by the preprocessing unit 17 per predetermined unit time changes. Therefore, it is necessary to change the driving speed of the pre-processing unit 17 (the cutter 41, the pulling device 42, the handling depth conveyance body 43, etc.) according to the traveling speed (synchronized).

  Therefore, the microcomputer unit 38 uses the traveling speed information from the traveling rotation sensor 36 to send information from the preprocessing rotation sensor 37 so as to drive the preprocessing unit 17 at a driving speed that secures a processing amount corresponding to the traveling speed. The shift of the work implement HST16 is monitored and controlled by the motor 39, and the drive speed of the preprocessing unit 17 is changed in conjunction with the travel speed as shown in the graph of FIG. That is, the speed interlocking means for changing the driving speed of the preprocessing unit 17 in conjunction with the traveling speed includes a motor 39, a microcomputer unit 38, a preprocessing rotation sensor 37, a traveling rotation sensor 36, and the like.

  As shown in FIG. 5, the microcomputer unit 38 (speed interlocking unit) sets the driving speed of the preprocessing in proportion to the traveling speed when the traveling speed is equal to or higher than a predetermined low speed (speed maintenance control start speed) V1. When the traveling speed becomes lower than the speed maintenance control start speed V1 and when the vehicle travels backward, the driving of the preprocessing unit 17 is continued while maintaining a predetermined low speed (maintenance speed) V2.

  The speed interlocking unit is configured to continue driving the pre-processing unit 17 at the maintenance speed V2 when the traveling speed becomes lower than the speed maintenance control start speed V1 as described above. You may set so that it may be substantially 0 or 0. V2 has a speed at which the combine can perform the cutting and conveying work.

  The work machine transmission 14 is driven by the preprocessing output shaft 19 and the feed chain output shaft 21 so that the feed chain 18 is driven at a predetermined speed ratio with respect to the driving speed of the preprocessing unit 17 by the above-described structure. Force (speed) ratio is set.

  As described above, the driving speed of the pre-processing unit 17 is changed in synchronization with the traveling speed, and the chopping of the culm and the conveying of the culm to the downstream side are smoothly performed in accordance with the traveling speed. However, the drive speed is changed following the change in the drive speed of the pretreatment unit 17, and the cereals conveyed by the handling depth conveyance body 43 of the pretreatment unit 17 can be smoothly conveyed to the handing cylinder 6 side. it can.

  At this time, since the driving speeds of the preprocessing unit 17 side and the feed chain 18 side are always synchronized, turbulent conveyance disturbance due to an error in the driving speeds of both can be prevented. With the above structure, work implement HST16 does not require reverse rotation, and can cope with only forward rotation, and the transmission mechanism can be configured simply.

  On the other hand, since the work machine transmission 14 is configured using the work machine HST 16, a common work machine HST 16 is disposed on the input side of the pretreatment unit 17 and the threshing feed chain 18, and the structure on the work machine transmission 14 side is thus determined. In addition to being compact, not only the traveling device, but also the pre-processing unit 17 and the threshing feed chain 18 are all steplessly shifted, so that the turbulent conveyance disturbance caused by the relationship with the traveling speed and the amount of cutting is smoothed. Can be prevented.

  In addition, the driving force of the pretreatment unit 17 and the threshing feed chain 18 is synchronously output from the work machine transmission 14 disposed on the downstream side of the threshing clutch 12, and the driving force of the handling cylinder 6 is also downstream of the threshing clutch 12. Therefore, by setting the threshing clutch 16 to the “cut” state, the pretreatment unit 17, the threshing feed chain 18, the handling cylinder 6, etc. are stopped, and the pretreatment unit 17 is turned off when the threshing unit 6 is stopped. A check device for stopping or not driving is unnecessary, and the structure can be simplified.

  On the other hand, since the pretreatment clutch 31 is disposed on the transmission downstream side of the work machine transmission 14 (between the pretreatment output shaft 19 of the work machine transmission 14 and the input shaft 26 of the pretreatment unit 17), the threshing clutch 12 is engaged. In the operating state, work implement HST16 is in a driving (rotating) state.

  For this reason, when the pre-processing clutch 31 is “on”, the rotational driving force in the work machine HST16 is inputted and the hydraulic pump 16P that rotates the hydraulic motor 16M has already been rotated, and the charge pump (hydraulic pump and hydraulic pressure) is rotated together with the hydraulic pump 16P. The pump for replenishing oil leaking between the motor and the motor is rotating.

  As a result, the load on the charge pump side when the pretreatment clutch 31 is engaged is small, no high pressure is generated in the charge pump, and the charge pump is already rotating, so that troubles such as piston seizure can be prevented. The durability of (HST) is also improved.

  In the case of the present embodiment, both the traveling transmission 8 and the work machine transmission 14 use HST as a transmission, and the HST (work machine HST 16) is controlled by electronic control so that the work machine transmission 14 is automatically controlled. Because of the structure to change the speed, the followability to the traveling speed of the speed interlocking means is high, and the traveling speed and the pre-processing unit even when a change in volumetric efficiency due to oil temperature, pressure, etc. occurs in the traveling HST4 or the working machine HST16. The drive speed of 17 synchronizes accurately.

  Further, the control of the microcomputer unit 38 includes a driving speed maintaining means (function) for continuing the driving of the pre-processing unit 17 while maintaining the speed V2 when the traveling speed is equal to or lower than the predetermined low speed V1 as described above. Since it is provided, for example, when the cutting operation is performed to the vicinity of the headland, and the vehicle is stopped or moved backward by the main speed change (traveling HST4), the drive speed maintaining function drives the preprocessing unit 17, the feed chain 18, and the handling cylinder 6. Will continue.

  That is, the speed maintaining function also includes a function of a reverse speed maintaining means for continuing the driving of the pre-processing unit 17 while maintaining the speed V2 even when the aircraft is moving backward, as described above, thereby cutting the cereals. It is possible to prevent leftovers and leftovers from being transported, and to prevent spilling and turbulence of cereals such as spills. In addition, the driving speed of the pre-processing unit 17 is reduced more than necessary, so that inconveniences such as pulling out and pushing out of stocks due to insufficient mowing work are prevented.

  On the other hand, the control of the microcomputer unit 38 is provided with speed maintenance canceling means (function) for stopping (cancelling) the driving speed maintenance function, and serves as switching means, as shown in FIG. It is configured so that the operation and non-operation of the speed maintenance cancel function (actuation of the drive speed maintenance function) can be set by the operation (ON, OFF) of the forced scraping release switch 53 connected to the input side. .

  That is, when the forced scraping release switch 53 is turned ON, the speed maintenance cancel function is activated, and the traveling speed is zero or a predetermined low speed (nearly zero) as shown in the graph of FIG. Stop speed) When V3 or less and the reverse state, the pre-processing unit 17 and the threshing feed chain 18 can be stopped with the work machine HST16 as neutral.

  As a result, during normal mowing and threshing work (row cutting), the forced scraping release switch 53 is turned on to operate the speed maintenance canceling function, and when the traveling speed is 0 or the near-stop speed V3 or less and the reverse traveling state, the preprocessing unit 17 and By stopping the threshing feed chain 18, for example, when threshing clogging occurs and the handling cylinder 6 is stopped, the pretreatment unit 17 and the threshing feed chain 18 are stopped by stopping the machine body, Clogging can be easily removed.

  In addition, since the pre-processing unit 17 and the threshing feed chain 18 are stopped, waste or the like is not discharged to the rear side of the fuselage when turning around, for example, at the time of turning. Inconvenience is prevented.

  On the other hand, the above-described pre-processing unit 17 can be moved up and down as in the prior art, and a pre-processing height potentiometer 44 for detecting the height of the pre-processing unit 17 is attached to the pre-processing unit 17 side. As shown, information from the potentiometer 44 is input to the microcomputer unit 38.

  The microcomputer unit 38 operates the work implement HST16 by the motor 39 to output the work implement HST16 when the pre-processing unit 17 is raised to a predetermined set height by the information from the potentiometer 44. 0, automatic stop means (function) for stopping the driving of the pretreatment unit 17 and the threshing feed chain 18 is provided.

  Thus, for example, when the pretreatment unit 17 is raised during turning, for example, when turning, the automatic stop function is activated by raising the pretreatment unit 17 to a predetermined height, and the pretreatment unit 17 and the threshing feed chain 18 are Since driving is stopped, drainage or the like is not discharged. For this reason, a straw or the like is not dropped at the turning place, and inconveniences such as the aircraft stepping on the straw when turning are prevented. At this time, as described above, the driving of the pre-processing unit 17 and the threshing feed chain 18 is stopped in synchronization, so that the conveyance disturbance and clogging of the cereals are prevented.

  When the preprocessing unit 17 is lowered from the raised state, the automatic stop function is canceled and the microcomputer unit 38 activates the motor 39 to lower the preprocessing unit 17 and the threshing feed again. The chain 18 is driven in synchronism with the traveling speed, and cutting, conveyance, and the like are resumed.

  Further, as shown in FIG. 4, a lift shut release switch 46 is also input to the microcomputer unit 38. When the lift shut release switch 46 is ON, the operation of the automatic stop function is stopped. When the lift shut release switch 46 is ON, the pretreatment unit 17 and the threshing feed chain 18 continue to be driven even if the pretreatment unit 17 is raised to the set height.

  However, on the side of the microcomputer unit 38, a main sensor 47 on the handling depth carrier 43 side that senses whether or not wrinkles are contained in the pre-processing unit 17 is also input, and the main sensor 47 moves toward the microcomputer unit 38 side. According to the information, even when the lift shut release switch 46 is ON, a drive stopping means (function) is provided to stop the driving of the preprocessing unit 17 and the threshing feed chain 18 when the preprocessing unit 17 finishes pouring the straw. Yes.

  That is, when the microcomputer unit 38 detects that the main sensor 47 is turned off after the pre-processing unit 17 is lifted by the drive stop function and the soot is finished, the motor 39 is driven to set the output of the work machine HST16 to zero. The drive of the pre-processing part 17 and the threshing feed chain 18 is stopped, and the drive beyond necessity is prevented.

  On the other hand, a main clutch 51 is provided between the pulley 2 and the input pulley 48 of the traveling HST, and the transmission of the driving force to the traveling device side (traveling transmission system) is cut off by operating the main clutch 51 to be cut off. It is possible to stop the aircraft.

  At this time, a sensor (safety switch) 52 for detecting a depression of the clutch pedal (disengagement operation of the main clutch 51) is provided on the side of the traveling clutch pedal that operates the main clutch 51. Information is input to the microcomputer unit 38. In the microcomputer unit 38, the motor 39 is driven by turning on the safety switch 38 (when the clutch pedal is depressed), the output of the work machine HST16 is set to 0 (neutral), and the preprocessing unit 17 and the threshing feed chain 18 are driven. An operation stop means (function) for stopping the operation is also provided.

  When the clutch pedal is depressed, the main transmission lever 33 is also forcibly returned to neutral, and the output of the traveling HST4 is also switched to 0 (neutral). As a result, the operator can depress the travel clutch pedal and disengage the main clutch 51 to urgently stop the airframe, so that the emergency stop operation is easy and the emergency stop can be surely performed.

  By the way, it is necessary to raise the drive speed of the pre-processing part 17 on the performance of the mowing in the state where the uncut grain cocoon is lying down. That is, in the case of this combine, the proportionality coefficient of the driving speed of the preprocessing unit 17 with respect to the traveling speed is increased, and the driving speed of the preprocessing unit 17 set by the speed interlocking unit is increased with respect to the side high speed as described above. There is a need.

  For this reason, in the present embodiment, the microcomputer unit 38 is provided with speed increasing means (function) for increasing the driving speed of the preprocessing unit 17 with respect to the traveling speed. The microcomputer unit 38 is shown in FIG. As described above, the speed increasing function is set to be turned on and off by turning on / off the lodging switch 58 connected to the microcomputer unit 38.

  Thereby, when performing the harvesting and threshing operation of the fallen cedar by the combine of the present embodiment, the operator turns on the fallen switch 58 manually to activate the speed increasing function, as shown in FIG. Compared with the driving speed S1 similar to FIG. 5 (dotted line in FIG. 7), the pre-processing unit 17 is driven at a high speed S2 (solid line in FIG. 7) with respect to the traveling speed, thereby cutting the fallen cereals. It can be carried out easily and stably. When the lodging switch 58 is turned OFF, the preprocessing unit 17 is driven at the speed of S1.

  In addition, the driving speed of the pretreatment unit 17 in which the cereals conveyed from the pretreatment unit 17 to the feed chain 18 are in an appropriate posture varies depending on the material conditions (such as the nap angle of rice and the rigidity of rice bran), the field conditions, etc. Thus, under any conditions, if the pre-processing unit 17 is driven at a preset driving speed (standard speed) by the speed interlocking means or the speed increasing function, the cereal conveyance such as the tip or the head of the stock will be disturbed. There is a case.

  In order to avoid this inconvenience, in this embodiment, the control of the microcomputer unit 38 is performed by changing the speed ratio of the driving speed of the preprocessing unit 17 with respect to the traveling speed (the proportional coefficient), and the driving speed of the preprocessing unit 17 is changed to the above. Speed change means (function) for changing the standard speed is provided, and the microcomputer unit 38 has a speed change function by switching a preprocessing speed change dial switch 59 connected to the microcomputer unit 38 as shown in FIG. It is configured to set on / off.

  At this time, the pre-processing speed change dial switch 59 has a plurality of switching positions as shown in FIG. 8, and by switching to each position, the standard speed is changed as shown in the graph of FIG. The drive speed is increased or decreased. That is, when the pre-processing speed change dial switch 59 is switched to position 1, it is driven with a proportional coefficient of 1 in FIG.

  As a result, when the driving speed of the pre-processing unit 17 is increased with respect to the traveling speed (standard speed), the tip is preceded, and when the driving speed is lowered, the stock is preceded (the tip is delayed). When the cereal conveyance disturbance occurs, the cereal conveyance disturbance can be corrected by switching the preprocessing speed change dial switch 59 to an appropriate position. Note that a variable resistance (volume or the like) may be used as the preprocessing speed change dial switch 59 so that the increase / decrease of the driving speed is set steplessly.

  Further, as shown in FIG. 4, a camera 61 is provided at the inherited portion of the feed chain 18 from the pre-processing unit 17, connected to the input side of the microcomputer unit 38, and based on the posture of the cereals photographed by the camera 61. You may comprise so that the speed change function may be actuated and the grain posture may be automatically corrected by adjusting the drive speed of the preprocessing unit 17.

  When the combine of the present invention is used for handling work, the traveling speed becomes 0. Therefore, if the speed maintenance canceling function is activated (the forced scratch release switch 53 is turned on), the driving speed of the preprocessing unit is 0, If the speed maintenance canceling function is inactive (the forced scratch release switch 53 is OFF), the driving speed maintenance function is activated and the driving speed of the preprocessing unit becomes V2.

  That is, in the handling operation, the driving speed of the feed chain 18 becomes 0 or relatively low (V2), and workability is not possible or deteriorates. In order to avoid this inconvenience, the microcomputer unit 38 of the present invention is provided with a handling speed increasing means (function), and the driving speed of the feed chain 18 during handling is increased by the handling speed increasing function. Thus, the handling operation can be efficiently performed.

  That is, the microcomputer unit 38 is connected with a hand switch 56 for detecting a hand handling state as shown in FIG. 4, and the microcomputer unit 38 is operated at a hand speed by turning the hand switch 56 on and off. It is configured to set the up / down function.

  By the way, in the present embodiment, as shown in FIG. 10, the feed chain 18 is held above the feed chain 18 as in the prior art, and a feed rail 62 that holds the grain straw together with the feed chain 18, and a feed at the front end 62 a of the straw rail 62. There is provided a grain presser foot 63 supported so as to be swingable up and down with respect to the chain 18, and the grain presser foot 63 has a handling work position H for raising the feed chain 18, and a feed The posture can be freely switched to the normal work position A where the front end of the chain 18 is laid down.

  In the case of the present embodiment, the handle switch 56 is provided on the heel rail 62 side, and when the culm presser foot 63 is switched to the standing posture (hand-operated work position H), the culm presser foot 63 The support unit 64 is turned on, and the microcomputer unit 38 enters and operates the hand speed increasing function.

  Further, an actuator (preprocessing clutch motor) for operating on / off of the preprocessing clutch 31 is provided on the preprocessing clutch 31 side, connected to the output side of the microcomputer unit 38 as shown in FIG. The preprocessing clutch motor 57 is driven so that the preprocessing clutch 31 can be automatically turned on and off in addition to the manual operation described above.

  As a result, when the grain handle presser 63 is switched to the handling position H and the handling switch 56 is turned on, the microcomputer unit 38 activates the handling speed increasing function, as shown in FIG. The driving speed of the preprocessing unit 17 when the traveling speed becomes equal to or lower than the predetermined speed is increased from the maintenance speed V2 to the handling speed V4, and the preprocessing clutch motor 57 is driven to disconnect the preprocessing clutch 31. The feed chain 18 is driven at a preset hand-handling maintenance speed V4 in a state in which the drive of the pre-processing unit 17 is stopped. Thus, the handling operation can be performed efficiently without reducing the working efficiency during the handling operation.

  Note that the microcomputer unit 38 checks the ON / OFF of the handling switch 56 in addition to the ON / OFF of the forced scratch release switch 53 in response to the operation of the speed maintenance cancel function. In the case of ON, speed maintenance cancel restricting means (function) that does not operate the speed maintenance cancel function even if the forced scraping release switch 53 is ON is provided.

  As a result, during the handling operation, the handling switch 56 is turned on, so that the speed maintenance cancellation restriction function is activated and the speed maintenance cancellation function is activated (the forced scratch release switch 53 is on). However, the speed maintenance cancel function is automatically stopped, and the inconvenience that the driving speed of the feed chain 18 becomes 0 is automatically prevented.

1 Engine 6 Handling cylinder 8 Traveling transmission (traveling transmission)
14 Pre-processing transmission (Pre-processing transmission)
17 Pre-processing unit 18 Threshing feed chain 36 Travel rotation sensor 38 Microcomputer unit (control device)
39 Motor (actuator)
44 Pretreatment height potentiometer

Claims (2)

  The output from the engine (1) is branched into a traveling transmission system and a work machine transmission system including a preprocessing unit (17), a handling cylinder (6), and a threshing feed chain (18). A traveling transmission (8) and a pre-processing transmission (14) for driving the pre-processing unit are provided, and the speed at which the driving speed of the pre-processing unit (17) is changed so as to increase as the traveling speed increases. In the preprocessing drive device provided with the interlocking means, the speed interlocking means detects the driving speed after the shift of the travel transmission (8) and the actuator (39) for shifting the preprocessing transmission (14). A rotation sensor (36), and a control device (38) for controlling the actuator (39) based on the information of the traveling rotation sensor (36) so as to drive the pre-processing unit (17) corresponding to the traveling speed. Before and The threshing feed chain (18) is driven by the preprocessing transmission (14) that drives the control unit (17), and the control device (38) detects the height of the preprocessing unit (17). When it is detected by the pretreatment height potentiometer (44) that the pretreatment unit (17) has risen to a predetermined height, the actuator (39) is operated to change the speed and the pretreatment unit (17) and the threshing feed chain are operated. A pre-processing drive device for a combine, characterized in that (18) is controlled to stop driving together.   A threshing clutch (12) for connecting and disconnecting the transmission from the engine (1) to the work machine transmission system is provided, the work machine transmission system is branched on the lower transmission side of the threshing clutch (12), and the branch transmission system is pre-processed. Transmission transmission to the machine (14), branching into a transmission system from the preprocessing transmission (14) to the preprocessing section (17) and a transmission system to the threshing feed chain (18), and a preprocessing transmission ( The pre-processing drive device for a combine according to claim 1, further comprising a pre-processing clutch (31) for connecting and disconnecting transmission from 14) to the pre-processing unit (17).

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