JP2017148022A - Feed chain drive mechanism for combine-harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the changeover between a cutting synchronous drive and a constant speed drive in a combine-harvester for switching a transportation speed of a feed chain into a cutting synchronous drive for synchronizing into a cutting running speed drive and a constant speed drive for driving at a predetermined speed.SOLUTION: In a feed chain drive mechanism for a combine-harvester, a feed chain 13 is driven on a speed change rotation transmission passage D for causing the driving force of an engine 20 to synchronize with the driving speed of a travel device 2 and a constant-speed rotation transmission passage T to be extracted from the drive passage of a threshing device 3, a change-over mechanism 57 for switching a speed change clutch 23 of the speed change rotation transmission passage D, a cut-off clutch 87 and a constant speed clutch 24 of a constant speed transmission pathway T is controlled by a single changeover motor 25.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a feed chain drive mechanism provided in a combine threshing apparatus.

  Conventionally, in a combine, the reaping device is configured to shift and drive in synchronization with the traveling speed of the traveling device, the feed speed of the feed chain is shifted by a continuously variable transmission dedicated to the feed chain, and the synchronized transport with the vehicle speed. A configuration in which the speed is changed between a low speed and a high speed on the basis of the speed and the conveyance speed of the harvested grain of the harvesting device is known (Patent Document 1).

  In addition, the first continuously variable transmission that continuously shifts the rotation input from the engine and outputs it to the traveling device and the reaping device, and the rotation input from the engine is continuously shifted to the feed chain. The structure which provided the 2nd continuously variable transmission which outputs toward is also well-known (patent document 2).

Japanese Patent No. 3494877 JP 2014-195435 A

  When harvesting with a combine, drive the mowing device and synchronize the transport speed of the feed chain with the traveling speed of the machine to shift the threshing, but stop the machine and supply the harvested cereals directly to the feed chain. During handling operations, the mowing device must be stopped and the feed chain transport speed adjusted to be driven at a predetermined speed. However, in the technique described in the cited document, the feed chain transport speed is continuously changed. Since a transmission or the like is provided, there are problems that the manufacturing cost is high and the configuration is complicated.

  The present invention realizes a low-cost and simple switching between the tuned synchronous drive and the constant speed drive in the combine that switches between the tuned synchronous drive that synchronizes the feed speed of the feed chain with the chopping travel speed and the constant speed drive that drives at a predetermined speed. For the purpose.

  The problems of the present invention are solved by the following technical means.

The invention according to claim 1 is a variable speed rotation transmission path (D) that synchronizes the driving force of the engine (20) with the driving speed of the traveling device (2), and the threshing device (3 In the feed chain drive mechanism of the combine that drives the feed chain (13) with the constant speed rotation transmission path (T) taken out from the drive path of
A single switching mechanism (57) for switching between the shifting clutch (23) and the mowing clutch (87) of the shifting rotation transmission path (D) and the constant speed clutch (24) of the constant speed rotation transmission path (T). The combine feed chain drive mechanism is characterized by being controlled by a switching motor (25).

  According to a second aspect of the present invention, a shift position of a shift operating tool that shifts the travel device (2) is detected, and the shift rotation transmission path (D) and the constant speed rotation transmission path ( 2. The combine feed chain drive mechanism according to claim 1, wherein transmission path selection with respect to T) is controlled.

  In the invention according to claim 1, when harvesting operation is performed by cutting, the shifting clutch (23) of the transmission rotation transmission path (D) is inserted while driving the cutting device (4) with the cutting clutch (87). To cut the constant speed clutch (24) of the constant speed rotation transmission path (T), thresh the harvested cereal with the threshing device (3), ) And the shifting clutch (23), the constant speed clutch (24) is inserted, and the cereals harvested by hand are fed to the feed chain (13) and threshed by the threshing device (3). (87), the shifting clutch (23) and the constant speed clutch (24) are switched by a single switching motor (25), so that the control of the feed chain drive mechanism is simplified and the manufacturing cost of the combine Can be reduced.

  In the invention according to claim 2, in addition to the effect of the invention according to claim 1, the operator who operates the combine only inputs the threshing drive operation tool, and the speed-change rotation transmission path (D ) Or the constant speed rotation transmission path (T), the feed chain (13) is driven to perform the threshing and harvesting operation, so that the operation of the combine is facilitated.

The left view of a combine. A side sectional view of a threshing device. Schematic diagram of combine transmission path. A side view of the vicinity of the feed chain switching mechanism. The side view which switched the clutch for transmission to the transmission state. The side view which switched the clutch for gear shifting to the interruption | blocking state. The front view which abbreviate | omitted one part of the threshing apparatus. The top view of the expansion | deployment state of the clutch vicinity for constant speeds. A side sectional view of a threshing device. The rear view. The control block diagram of the motor for switching. The control flowchart figure of the motor for switching.

  An embodiment of the present invention will be described with reference to a combine drawing.

  In FIG. 1, 1 is a combine body frame, 2 is a traveling device provided below the body frame 1, 3 is a threshing device provided above the body frame 1, 4 is a reaping device provided on the front side of the threshing device 3, Reference numeral 5 denotes a grain tank provided on the side of the threshing device 3, and reference numeral 6 denotes a control unit provided on the front side of the grain tank 5.

  The reaping device 4 is provided with a weeding device 8 for weeding cereals raised at the foremost position side by side, and cereals that are divided by the weeding device 8 on the rear side of each weeding device 8. , A cutting blade 10 is provided on the rear side of the pulling device 9, and a threshing device 3 on the rear side of the harvested rice cake cut by the cutting blade 10 on the rear side above the cutting blade 10. A chopped grain culm transport device (not shown) for transporting to the feed chain 13 is provided.

  The reaping device 4 is provided at the tip of a vertical support frame 11 whose base is attached to the machine body so as to be pivotable up and down on a horizontal axis.

  The cereal mash harvested and conveyed by the reaping device 4 is inherited in a proper posture by the feed chain 13 of the threshing device 3 and supplied and conveyed. The feed chain 13 is stretched along a handling port on one side of the handling chamber on which the handling cylinder 14 (FIG. 2) can be pivoted. The waste after the threshing process is carried out by the waste chain 18 (FIG. 2).

  The feed chain 13 is configured to be able to perform a manual operation of manually supplying cereals to the operation room even when the aircraft is stopped from traveling.

  In FIG. 2, 15 is a guide rail of the feed chain 13, 16 is a pinch grip provided above the feed chain 13, and 17 is a support frame that supports the guide rail 15. Although not shown in the figure, as the hand switch 94 (FIG. 11), a normally closed type switch is provided below the front part of the pinch knob 16, or a normal open type is provided above the front part of the pinch knob 16. By providing a switch, the front part of the pinch 16 is raised, so that it is possible to supply the hand-held cereals between the pinch 16 and the feed chain 13 and The switch 94 may be turned on. Further, an auxiliary hook that covers the upper part of the front of the feed chain 13 in front of the hook 16 and is movable up and down is provided, and the hand switch 94 detects the rise of the auxiliary hook. You can also

  The rotation transmission path from the engine 20 to the feed chain 13 is a transmission speed transmission path D for transmitting a transmission synchronized rotation synchronized with a traveling speed transmitted from the traveling device 2 to the reaping device 4, and the threshing device 3. The transmission chain 13 is configured to be driven by two transmission paths, ie, the constant speed rotation transmission path T to be transmitted, and the feed chain 13 is configured to be switched and transmitted from either the variable speed rotation transmission path D or the constant speed rotation transmission path T. (Figure 3).

  Therefore, it is possible to smoothly perform the work either in the normal mowing work form performed in the variable speed rotation transmission path D or in the handling work form performed in the constant speed rotation transmission path T.

  The speed-change rotation transmission path D for transmitting the speed-synchronized rotation synchronized with the travel speed, for example, causes the travel power device 2 to continuously feed the rotational power from the engine 20 by the travel mission device 22 via the hydraulic continuously variable transmission 21. Instead of the embodiment shown in the figure, which drives the speed change and transmits the gear shift synchronized rotation synchronized with the traveling speed to the cutting device 4 via the traveling mission device 22, a dedicated continuously variable transmission of the cutting device 4 is provided. You may make it drive the feed chain 13 through the continuously variable transmission only for mowing.

  The constant speed rotation transmission path T is configured to transmit a constant speed rotation of a constant gear ratio from the engine 20 to the threshing device 3 and transmit the constant speed rotation to the feed chain 13.

  For switching between the variable speed rotation transmission path D and the constant speed rotation transmission path T, a transmission clutch 23 and a constant speed clutch 24 are provided in the variable speed rotation transmission path D and the constant speed rotation transmission path T, respectively. 23 and the constant speed clutch 24 are turned on and off (engaged / disengaged) by a single switching motor 25.

  Therefore, in a normal cutting operation, the feed chain 13 is driven in synchronization with the cutting traveling speed of the traveling device 2 by the variable speed rotation transmission path D, so that the threshing device 3 can be smoothly conveyed according to the amount of the cutting culm. Suppress clogging. Further, in the handling operation, the feed chain 13 is driven by a constant rotation with the rotation speed of the engine 20 being lower than that in the normal operation by the constant speed rotation transmission path T. Therefore, a small amount of cereal is manually supplied. Even in the handling operation, the threshing is performed well, the occurrence of unhandled residue is suppressed, and the safety of the handling operation can be improved.

  Moreover, since the constant speed rotation transmission path T drives the threshing apparatus 3 and the feed chain 13 by the low-speed constant rotation of the engine 20, it becomes energy saving.

  The configuration of the rotation transmission path of the engine 20 to the feed chain 13 is arbitrary, but as an example, the start-end side shaft 29 of the start-end side gear 28 and the end-side shaft of the end-side gear 30 around which the feed chain 13 is wound are shown. The two shafts 31 and 31 are respectively input shafts to the feed chain 13, and the constant-speed rotation of the constant-speed rotation transmission path T through the threshing device 3 is applied to either the start-end side shaft 29 or the end-side shaft 31, In addition, the shift synchronous rotation from the transmission rotation transmission path D via the hydraulic continuously variable transmission 21 of the traveling mission device 22 is input.

  The transmission device K provided with the starting end side shaft 29 of the variable speed rotation transmission path D is disposed between the front end portion of the feed chain 13 and the front plate 32 of the threshing device 3 in the front-rear direction.

  Therefore, the transmission device K can be arranged avoiding the conveyance start end portion of the feed chain 13, and the presence of the transmission device K does not hinder the handing over of the cereal from the reaping device 4 to the feed chain 13.

  In the present embodiment, the start end side shaft 29 of the start end side gear 28 of the feed chain 13 is mounted on the front gear box 35, and the front gear box 35 is used as the transmission device K.

  An input shaft 36 is mounted on the front gear box 35, and a belt 39 is wound around an input pulley 37 and an intermediate pulley 38 provided on the input shaft 36. The intermediate pulley 38 is attached to a transmission rotation shaft (counter shaft) 40 to which transmission synchronized rotation synchronized with the traveling speed to the reaping device 4 is transmitted, and is configured as a transmission rotation transmission path D for transmission to the feed chain 13.

  Therefore, the structure of the speed change rotation transmission path D from the cutting device 4 to the feed chain 13 can be simply configured.

  The tension pulley 41 abutted against the belt 39 between the input pulley 37 and the intermediate pulley 38 is used as the speed change clutch 23.

  The speed change rotation shaft 40 that outputs the rotation shifted from the engine 20 via the hydraulic continuously variable transmission 21 from the traveling mission device 22 is arranged in parallel with the intermediate pulley 38 and a cutting intermediate pulley 84 is fixed. A belt 88 is wound around the input shaft 86 fixed to the input shaft 86 of the apparatus 4, and a cutting tension pulley 87 serving as a cutting clutch is contacted and separated.

  In FIG. 2, 42 is a tang of the threshing apparatus 3, 43 is a first conveyor, 44 is a second conveyor, 45 is a swing sorting shelf, and 46 is a suction dust exhaust fan. Is transmitted. 3, 48 is a belt, 49 is an intermediate gear, 50 is a dust exhaust fan input gear provided on the rotary shaft 51 of the suction dust exhaust fan 46, 52 is a gear meshing with the dust exhaust fan input gear 50, and 53 is a gear 52. A gear provided separately on the same axis, 54 is an intermediate gear provided on the terminal shaft 31 meshing with the gear 53, and the drive rotation from the suction dust exhaust fan 46 is performed via the gear 52, the gear 53, and the intermediate gear 54. A transmission path from the engine 20 to the terminal end shaft 31 of the feed chain 13 is configured as a constant speed rotation transmission path T.

  An engagement claw 55 that slides between the gear 52 and the gear 53 is provided as the constant speed clutch 24. A shifter 56 slides the engaging claw 55.

  A switching mechanism 57 for the switching motor 25, the transmission clutch 23, and the constant speed clutch 24 is provided in the vicinity of the front gear box 35.

  As shown in FIGS. 4 to 6, the switching mechanism 57 between the switching motor 25 and the speed change clutch 23 has one end of the rod 59 attached to the tension arm 58 of the tension pulley 41, and the other end of the rod 59 is used for switching. The motor 25 is attached to a rotating body 60 that rotates forward and backward.

  One end of the wire 89 is attached to the tension arm 87 a of the cutting clutch 87, and the other end of the wire 89 is attached to the rotating body 60 that rotates forward and backward by the switching motor 25.

  Accordingly, the rod 59 is pushed and pulled by the forward / reverse rotation of the switching motor 25, the tension pulley 41 is brought into contact with and separated from the belt 39, the transmission clutch 23 is turned on and off, and the wire is moved by the forward / reverse rotation of the switching motor 25. The cutting clutch 87 is turned on and off by tensioning or loosening 89.

  The speed change clutch 23 and the mowing clutch 87 are urged toward the clutch disengagement side.

  On the other hand, the switching mechanism 57 between the switching motor 25 and the constant speed clutch 24 has the tip of the operation transmission member 61 attached to the shifter 56, the base of the operation transmission member 61 attached to one end of the rod 62, The other end is attached to the rotating body 60.

  The shifting clutch 23 and the constant speed clutch 24 are configured such that when one is “cut (cut off)” and the other is “on (connected)” by the operation of the rod 59 and the rod 62 of the switching mechanism 57. Configure.

  In addition, springs 63 are interposed between the rod 59 and the tension arm 58 and between the rod 62 and the operation transmission member 61, respectively.

  The spring 63 acts so that the shifting clutch 23 and the constant speed clutch 24 are smoothly turned on and off.

  In other words, the speed change clutch 23 and the constant speed clutch 24 are such that the speed change clutch 23 is a tension pulley type clutch, the constant speed clutch 24 is an engagement claw type clutch, and both are temporarily “on”. In this case, the tension pulley 41 of the speed change clutch 23 is set to slide, but there is still a load when switching, and switching between the speed change clutch 23 and the constant speed clutch 24 at this time may occur. The spring 63 absorbs the load associated with, and the switching is performed smoothly.

  In this example, in FIG. 5, the tension pulley 41 is in contact with the belt 39, and the speed change clutch 23 and the mowing clutch 87 are in the “ON” connection state. At this time, the constant speed clutch 24 is operated by the operation transmission member. When 61 is pulled, the pair of engaging claws 55 are separated and become “cut”, and the drive transmission is cut off. Conversely, as shown in FIG. 6, when the rotating body 60 is rotated to loosen the rod 59, the tension pulley 41 is separated from the belt 39, the speed change clutch 23 and the mowing clutch 87 are turned “off”, and the operation transmission member 61 is The pair of engaging claws 55 are engaged with each other, and the constant speed clutch 24 is turned “on”.

  The configuration of the constant speed clutch 24 is arbitrary, but it is configured by providing an engaging claw 55 that slides between the gear 52 and the gear 53 provided in the rear gear box 64, and the operation transmitting member 61 is The shifter 56 is connected to the shifter 56 and urged by a spring (not shown) so that the constant speed clutch 24 is engaged.

  The front gear box 35 (transmission device K) is provided with the start end side shaft 29 of the feed chain 13 at the upper portion and the input shaft 36 below the start end side shaft 29.

  Therefore, the front-rear distance between the reaping device 4 and the start-end side gear 28 can be reduced, and the belt 39 can be separated from the conveying surface of the guide rail 15 of the feed chain 13, and the grain with respect to the variable speed rotation transmission path D can be reduced. It is possible to suppress wrapping of the bag.

  The front gear box 35 (transmission device K) is attached to a vertical plate-like support member 65 (FIG. 6). The lower portion of the support member 65 is fixed to the body frame 1, and the front portion of the support member 65 is connected to a cutting suspension base 66 that rotatably supports the base portion of the vertical support frame 11 of the cutting device 4, and a counter shaft. 67 is fixed to the stay 68 on which the shaft is mounted. The stay 68 is attached to the front plate 32 of the threshing device 3.

  That is, the front part of the transmission device K (front gear box 35) is connected to the mowing suspension 66, and the rear part of the transmission device K (front gear box 35) is connected to the threshing device 3 (front plate 32 and stay 68).

  Therefore, the support member 65 connects the front gear box 35, the mowing suspension base 66, and the front plate 32 of the threshing device 3 to each other, and the rigidity in the vicinity of the front gear box 35 can be improved.

  The start end side gear 28 and the end end side gear 30 of the feed chain 13 use gears having the same number of teeth, so that parts can be shared.

  A cover 70 (FIG. 4) is provided at least on the upper surface and the front surface of the intermediate pulley 38 to surround the outer periphery of the intermediate pulley 38, thereby suppressing adhesion and winding of the sawdust and the like from the feed chain 13.

  The cover 70 is provided with a belt stopper 71 that prevents the belt 39 from being detached from the intermediate pulley 38. The belt stopper 71 is provided so as to surround the lower portion of the intermediate pulley 38.

  As shown in FIG. 2, the front side portion of the support frame 17 of the feed chain 13 is formed in the shape of a vertical axis and is formed on a rotary shaft portion 72, and the rotary shaft portion 72 is a feed chain support portion provided on the body frame 1. 73 is rotatably provided. The feed chain support part 73 is provided in front of the open support part 74 of the cutting device 4.

  That is, the open fulcrum (rotating shaft part 72) of the feed chain 13 is provided in front of the open fulcrum (open support part 74) of the cutting device 4.

  Therefore, when the feed chain 13 is opened outside, the feed chain 13 can be prevented from entering the machine body when the front end of the feed chain 13 rotates about the rotation fulcrum, and the outside open amount of the feed chain 13 can be secured large. .

  Further, the front end position of the feed chain 13 is set to be substantially the same front-rear position as the rotation shaft portion 72 and the feed chain support portion 73.

  That is, the open fulcrum (rotating shaft portion 72) of the feed chain 13 is disposed at substantially the same position as the front end portion of the feed chain 13.

  Therefore, it is possible to further suppress the front side portion of the feed chain 13 from entering the machine body, and to secure a large amount of the outer open of the feed chain 13.

  A moving-side guide body 75 that protrudes toward the threshing device 3 is provided in a predetermined portion on the front side of the rod 62 of the feed chain 13, and the moving-side guide body 75 is a fixed-side guide body 76 provided on the threshing device 3 side (front plate 32). The rod 62 is configured to maintain a predetermined height (FIG. 7).

  Therefore, when the feed chain 13 is opened outside and rotated inward to return to the original working state, the moving side guide body 75 rides on the fixed side guide body 76 and guides and holds the rod 62 at a predetermined height.

  Since the moving side guide body 75 is provided at a predetermined position between the start side gear 28 and the end side shaft 31 of the feed chain 13, the start end side gear 28 and the end side when the inner side is rotated to return to the original working state. Both the heights of the shaft 31 can be guided to the set height to facilitate coupling joining.

  A chain support (chain slack side slurry) 77 is provided below the feed chain 13 on the side close to the start end side gear 28 between the start end side gear 28 and the end end side shaft 31 of the feed chain 13. In the handling mode by constant speed driving, the feed chain 13 moving from the terminal end side shaft 31 to the start end side gear 28 may hang down on the slack side, but the chain support 77 supports and the feed chain 13 The movement can be stabilized.

  The operation of the switching motor 25 for switching from the variable speed rotation transmission path D, which is a normal work state, to the constant speed rotation transmission path T, which is the hand-handling mode, is arbitrary, but is configured to be performed by a mode switch. The rotation control of the engine 20 can be easily automated, and the operability is improved, which is preferable.

  As shown in FIGS. 9 and 10, the start end portion of the dust removal treatment cylinder 78 is arranged so as to overlap the end portion of the treatment cylinder 14 of the threshing device 3 in a side view, and the end of the treatment chamber 79 and the start end of the dust removal chamber 80 are arranged. Is connected to the communication port 81, and the periphery of the end of the treatment cylinder 14 extended rearward from the communication port 81 is configured in the fourth processing chamber 82. A hanging wall 83 is provided between the treatment cylinders 78.

  Therefore, the object to be processed which is processed by the handling cylinder 14 without entering the dust chamber 80 by the communication port 81 falls by the hanging wall 83 in the vicinity of the communication port 81 and the start end side of the dust processing cylinder 78. It is processed with the swing sorting shelf 45 without being mixed with the product, and the processing efficiency is improved.

  That is, the threshing material to be processed entering the dust chamber 80 from the communication port 81 has a large amount of soot, and therefore, the dust processing material falling from the dust chamber 80 tends to have a large amount of dust. In the number processing chamber 82, soot is contained in the dust discharge chamber 80 at the communication port 81, so that the processing accuracy of the fourth object to be processed by the handling cylinder 14 in the fourth processing chamber 82 is small. As a result, the drooping wall 83 causes the dust treated material from the dust chamber 80 and the fourth treated material from the fourth processing chamber 82 to merge on the swing sorting shelf 45. In this way, the processing accuracy of the swing sorting shelf 45 can be improved.

  The hanging wall 83 is formed by attaching an upper portion thereof to the dust removal chamber 80 side of the fourth processing chamber 82, inclining toward the feed chain 13 as it goes down, and drooping substantially vertically from a predetermined portion between the upper and lower sides. doing.

  Therefore, it is possible to suppress the object to be processed from being deposited on the hanging wall 83 by the upper inclined part, and to prevent the object to be discharged from the dust chamber 80 from being scattered toward the feed chain 13 by the lower part of the lower part. Then, merging with the fourth object to be processed from the fourth processing chamber 82 is suppressed.

  Next, the operation of the combine according to the present embodiment will be mainly described.

  The machine is run, the cereals in the field are harvested by the reaping device 4, and the harvested cereals are supplied to the threshing device 3 for threshing.

  In this case, generally, first, the four corners of the field are hand-cut to form a vacant land where the combine can enter, and the combine is run from the vacant land to harvest and thresh the grain culm in the field.

  Note that the hand-cut cereals at the four corners of the field are usually placed on the edge of the field, and after the harvesting and threshing work of the field is completed, the threshing apparatus 3 threshs by hand.

  When the harvesting and threshing of the field is completed, the feed chain 13 and the threshing device 3 are driven in a state in which the machine is stopped, and the chopped rice grains cut by the above-mentioned manual work are supplied to the feed chain 13 for threshing. .

  The rotation transmission path from the engine 20 to the feed chain 13 is a transmission speed transmission path D that transmits a transmission synchronized rotation synchronized with the traveling speed transmitted to the reaping device 4, and a constant speed ratio to the threshing device 3. Since it is configured to be driven by two transmission paths of the constant speed rotation transmission path T to be transmitted, and is configured to transmit to the feed chain 13 from either the variable speed rotation transmission path D or the constant speed rotation transmission path T. The work can be performed smoothly in both the normal mowing work form and the handling work form.

  Therefore, in the normal reaping work, the speed-synchronized rotation synchronized with the traveling speed by the speed-change rotation transmission path D is transmitted to the reaping device 4 and the feed chain 13 to perform the reaping operation, while the threshing device 3 includes the engine 20 The threshing work is carried out by transmitting a constant speed rotation with a constant gear ratio from.

  Switching from the variable speed rotation transmission path D, which is a normal work state, to the constant speed rotation transmission path T, which is in the handling mode, is performed by changing the speed change clutch 23 and the constant speed rotation transmission path T respectively. Since the speed clutch 24 is provided and the shift clutch 23 and the constant speed clutch 24 are turned on and off (engaged / disengaged) by a single switching motor 25, the switching motor 25 is used for normal operation. The speed clutch 24 is turned “off”, the speed change clutch 23 is turned “on”, and the feed chain 13 is driven in synchronism with the cutting device 4 (vehicle speed) through the speed change transmission path D.

  In the handling operation, the speed change clutch 23 is turned “off” by the switching motor 25 and the constant speed clutch 24 is turned “on”, and the rotation of the engine 20 is compared with that during normal operation by the constant speed rotation transmission path T. However, even if it is a manual handling operation in which a low-speed constant-speed rotation is transmitted to the feed chain 13 to supply a small amount of cereal by hand, the threshing is performed satisfactorily and the occurrence of unhandled residue is suppressed.

  The configuration of the rotation transmission path of the engine 20 to the feed chain 13 is such that two axes of the start end side shaft 29 of the start end side gear 28 and the end end side shaft 31 of the end end side gear 30 that are wound around the feed chain 13 are input shafts. The constant speed rotation of the threshing device 3 is applied to either the starting end side shaft 29 or the terminal end side shaft 31, and the hydraulic continuously variable transmission 21 is applied to either the starting end side shaft 29 or the end end shaft 31. Therefore, only by switching on / off of the shift clutch 23 and the constant speed clutch 24 by the switching motor 25, the shift rotation transmission path D and the constant speed rotation transmission path T are switched. Switching can be performed and operation becomes easy.

  The transmission device K provided with the starting end side shaft 29 of the variable speed rotation transmission path D is disposed between the front end portion of the feed chain 13 and the front plate 32 of the threshing device 3 in the front-rear direction. Therefore, the presence of the transmission device K does not hinder the handing over of the cereal from the reaping device 4 to the feed chain 13.

  In this embodiment, the start end side shaft 29 of the start end side gear 28 of the feed chain 13 is mounted on the front gear box 35, the front gear box 35 is used as the transmission device K, and the input shaft 36 is connected to the front gear box 35. A shaft 39 is mounted and a belt 39 is wound around an input pulley 37 and an intermediate pulley 38 fixed to the input shaft 36, and the intermediate pulley 38 is a speed-change rotation shaft to which a speed-change synchronized rotation synchronized with the traveling speed to the reaping device 4 is transmitted. 40, a drive rotation transmission path that is transmitted from the engine 20 to the reaping device 4 via the hydraulic continuously variable transmission 21 and the traveling mission apparatus 22 is referred to as a transmission rotation transmission path D that is transmitted to the feed chain 13, The tension pulley 41, which is abutted against the belt 39 between the input pulley 37 and the intermediate pulley 38, serves as the speed change clutch 23. The shift rotation transmission path D and the speed change clutch 23 to the chain 13 can be easily configured.

  The driving rotation from the engine 20 is transmitted to the input pulley 47 of each part of the threshing device 3 such as the carp 42 and the first conveyor 43, and the constant speed driving rotation of each part of the threshing device 3 is transmitted to the terminal end gear 30 of the feed chain 13. The structure for transmitting to the side shaft 31 is configured as a constant speed rotation transmission path T, and an engagement claw 55 that slides between the gear 52 and the gear 53 on the transmission path between the input pulley 47 and the terminal side gear 30 is provided. Since the constant speed clutch 24 is used, a constant speed rotation transmission path T and a constant speed clutch that are transmitted to the feed chain 13 at a constant speed ratio are transmitted using a transmission path that transmits constant rotation to the threshing device 3. 24 can be provided.

  Since the switching mechanism 57 of the switching motor 25, the shift clutch 23, and the constant speed clutch 24 is provided in the vicinity of the front gear box 35, the switching mechanism 57 can be configured compactly and simply.

  A switching mechanism 57 between the switching motor 25 and the speed change clutch 23 has one end of a rod 59 attached to the tension arm 58 of the tension pulley 41, and the other end of the rod 59 is rotated to a rotating body 60 that rotates forward and backward by the switching motor 25. Since it is attached, the rod 59 is pushed and pulled by forward / reverse rotation of the switching motor 25, the tension pulley 41 is brought into contact with and separated from the belt 39, and the shift clutch 23 is turned on and off.

  On the other hand, the switching mechanism 57 between the switching motor 25 and the constant speed clutch 24 has the tip of the operation transmission member 61 attached to the shifter 56, the base of the operation transmission member 61 attached to one end of the rod 62, and the other end of the rod 62. Is attached to the rotating body 60, so that the operation of the rod 59 and the rod 62 of the switching mechanism 57 causes one of the shifting clutch 23 and the constant speed clutch 24 to be "off" and the other to be "on". .

  Since the input pulley 37 is mounted on the front gear box 35 (transmission device K) below the start-end side gear 28, the input pulley 37 can be configured by reducing the front-rear distance between the cutting device 4 and the start-end side gear 28, and The belt 39 can be separated from the conveying surface of the guide rail 15 of the feed chain 13, and wrapping of cereals around the variable speed rotation transmission path D can be suppressed.

  The lower part of the vertical plate-like support member 65 to which the front gear box 35 (transmission device K) is attached is fixed to the body frame 1, and the front side portion of the support member 65 is freely rotatable at the base of the vertical support frame 11 of the reaping device 4. It is connected to the cutting suspension base 66 to be supported, and the shift rotary shaft 40 is fixed to the stay 68 mounted on the shaft. The stay 68 is attached to the front plate 32 of the threshing device 3, so that the front gear box 35 (transmission device K ) Is firmly supported by a support member 65 that connects the mowing suspension 66 and the front plate 32 of the threshing device 3 to each other.

  That is, the front part of the transmission device K (front gear box 35) is connected to the mowing suspension 66, and the rear part of the transmission device K (front gear box 35) is connected to the front plate 32 of the threshing device 3 by the stay 68. The transmission device K (front gear box 35), the cutting suspension base 66, and the front plate 32 of the threshing device 3 are connected to each other, and the rigidity in the vicinity of the transmission device K (front gear box 35) and the cutting suspension base 66 is improved.

  A rotation shaft portion 72 of the front side portion of the rod 62 of the feed chain 13 is rotatably provided on a feed chain support portion 73 provided on the body frame 1, and the feed chain support portion 73 is located on the front side of the open support portion 74 of the cutting device 4. Therefore, when the feed chain 13 is opened outside, the front end of the feed chain 13 can be prevented from entering the machine body when the feed chain 13 rotates around the rotation fulcrum. Largely secured.

  That is, since the open fulcrum (rotating shaft part 72) of the feed chain 13 is provided in front of the open fulcrum (open support part 74) of the cutting device 4, the rotating fulcrum of the feed chain 13 is used as the front end of the feed chain 13. The feed chain 13 and the front end of the feed chain 13 can be brought close to each other to prevent the feed chain 13 from entering the machine body when the feed chain 13 is opened outside. The feed chain 13 can secure a large outside open amount of 3.

  Furthermore, since the front end position of the feed chain 13 is substantially the same front and rear position as the rotation shaft portion 72 and the feed chain support portion 73, the open fulcrum (rotation shaft portion 72) of the feed chain 13 is used as the front end portion of the feed chain 13. Therefore, it is possible to further suppress the front portion of the feed chain 13 from entering the machine body and to secure a large amount of the open side of the feed chain 13.

  FIG. 11 is a control block diagram of the switching motor 25. The shift control device 90 receives the shift position of the traveling mission device 22 from the shift sensor 91 that detects the shift position of the main shift lever that is a shift operation tool. A stop signal is input from the emergency stop switch 92, an on / off signal of a chopping switch as a threshing drive operating tool is input from the chopping sensor 93, and an on / off switch is provided from a hand switch 94 provided on the left side of the control unit 6. A signal is input, and a control signal is output from the switching control device 90 to the switching motor 25.

  FIG. 12 is a control flowchart of the switching motor 25. When the cutting / separation sensor 93 is turned on (ON) in step S1, the switching motor 25 is turned on in step S2, but steps S4, S11, and step are performed. Different control is performed in the determination of S18.

  First, when the shift sensor 91 detects the forward position in step S4, the shift clutch 23 and the cutting clutch 87 are switched on in step S5, and the cutting device 4 and the feed chain 13 are driven in step S6. After that, when the emergency stop switch 92 is turned on in step S7, if the reaping device 4 is raised to a predetermined height or higher in step S8, the shift clutch 23 and the reaping clutch 87 are turned off in step S9, and in step S10. The cutting device 4 and the feed chain 13 are stopped. It is also possible to control to proceed to step S8 without determining the state of the emergency stop switch 92 in step S7.

  Further, when the shift sensor 91 detects the neutral position in step S11, the shift clutch 23 and the cutting clutch 87 are switched on in step S12. At this time, since the output from the hydraulic continuously variable transmission 21 is stopped because the main transmission lever is in the neutral position, the cutting device 4 and the feed chain 13 are stopped driving (step S13). Thereafter, when the hand switch 94 is turned on in step S14, the constant speed clutch 24 is turned on and the mowing clutch 87 is turned off in step S15.

  When the hand switch 94 is turned on, the rotation of the engine 20 is reduced by lowering the voltage through another dial type variable resistor provided in parallel with the acceleration potentiometer resistance of the engine 20. Reduce the transport speed.

  Further, when the emergency stop switch 92 is turned on in step S16, the constant speed clutch 24 is turned off and the cutting clutch 87 is turned off and the stopper is driven in step S17, and the cutting device 4 and the feed chain 13 are stopped in step S10. .

  Further, when the shift sensor 91 detects the reverse position in step S18, the shift clutch 23 and the cutting clutch 87 are turned off in step S19, and the cutting device 4 and the feed chain 13 are stopped in step S10.

  Each of the above embodiments is illustrated or described separately or mixed for easy understanding, but these can be combined in various ways, and the expression, configuration, action, etc. It is not limited, and there are of course cases where a synergistic effect is obtained.

D Variable speed rotation transmission path T Constant speed rotation transmission path 2 Traveling device 3 Threshing device 4 Mowing device 13 Feed chain 20 Engine 22 Traveling mission device 23 Shifting clutch 24 Constant speed clutch 25 Switching motor 57 Switching mechanism 87 Mowing clutch

Claims (2)

A variable speed rotation transmission path (D) for synchronizing the driving force of the engine (20) with the driving speed of the traveling device (2), and a constant speed rotation for extracting the driving force of the engine (20) from the driving path of the threshing device (3). In the feed chain drive mechanism of the combine that drives the feed chain (13) with the transmission path (T),
A single switching mechanism (57) for switching between the shifting clutch (23) and the mowing clutch (87) of the shifting rotation transmission path (D) and the constant speed clutch (24) of the constant speed rotation transmission path (T). A combine feed chain drive mechanism controlled by a switching motor (25). A shift position of a shift operating tool that shifts the travel device (2) is detected, and transmission path selection between the shift rotation transmission path (D) and the constant speed rotation transmission path (T) is controlled based on the shift position. The combine feed chain drive mechanism according to claim 1.