JP2016119881A - combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a conveyance speed of a feed chain to a threshing device is optimized by shifting gears on the basis of the conveyance speed of reaped grain culms of a reaping device, and thereby a transmission for exclusive use of the feed chain is needed to increase a production cost.SOLUTION: A feed chain 13 is arranged which supplies and conveys grain culms reaped by a reaping device 4 in a front part of a machine body to a threshing chamber of a threshing device 3 and the reaping device 4 is driven by gear shift synchronization synchronized in a travelling speed of a travel device 2 by a hydraulic continuously variable transmission 21. The feed chain 13 is driven by two system transmission paths of a gear shift rotation transmission path D for transmitting the gear shift synchronization rotation transmitted to the reaping device 4, and a constant speed rotation transmission path T transmitted to the threshing device 3 at a constant gear ratio. The gear shift rotation transmission path D and the constant speed rotation transmission path T are switched by switching ON/OFF a gear shift clutch 23 and a constant speed clutch 24 by a switch motor 25 in the combine.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a combine.

  Conventionally, the reaping device is configured to be driven 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 feed chain is synchronized 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 rotation and the conveyance speed of the harvested grain of the harvesting device is known (Patent Document 1).

Japanese Patent No. 3494877

In the above-mentioned known example, the speed of the feed chain with respect to the threshing device is optimized by shifting the speed based on the speed of conveyance of the harvested grain of the harvesting device. There is a problem that costs increase.
Moreover, there exists a subject that it cannot respond to the supply work of the hand-harvested cereal.
The present invention makes it easy to switch between a normal mowing and threshing operation and a handling operation and simplifies the switching configuration.

According to the first aspect of the present invention, a feed chain 13 is provided for feeding and transporting the harvested culm to the handling room of the threshing device 3 in the reaping device 4 in front of the machine body. The reaping device 4 is driven by a hydraulic continuously variable transmission 21. The threshing device 3 is configured to transmit the driving rotation of the engine 20 at a constant gear ratio, and the feed chain 13 is transmitted to the reaping device 4. The transmission is driven by two transmission paths, that is, a transmission / rotation transmission path D that transmits the synchronized rotation and a constant speed rotation transmission path T that is transmitted to the threshing device 3 at a constant transmission ratio. A shift clutch 23 and a constant speed clutch 24 are provided in each of D and the constant speed rotation transmission path T. When one of the shift clutch 23 and the constant speed clutch 24 is connected, the other is disconnected. Ru A combine configured to switch between the variable speed rotation transmission path D and the constant speed rotation transmission path T by switching on and off the transmission clutch 23 and the constant speed clutch 24 by a single switching motor 25; In normal operation, the constant speed clutch 24 is disconnected by the switching motor 25 and the speed change clutch 23 is connected, and the feed chain 13 is synchronized with the cutting device 4 (vehicle speed) by the speed change rotation transmission path D. Then, the feed chain 13 is driven, and in the handling operation, the speed change clutch 23 is disconnected by the switching motor 25 and the constant speed clutch 24 is connected to transmit the constant speed rotation to the feed chain 13 for driving. .
According to the second aspect of the present invention, the transmission device K provided with the starting end side shaft 29 of the variable speed rotation transmission path D is a combine 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. In normal operation, rotation is transmitted to the feed chain 13 from the transmission device K located between the front end portion of the feed chain 13 and the front plate 32 of the threshing device 3.
The invention according to claim 3 connects the front portion of the transmission device K to a cutting suspension base 66 that supports the base portion of the vertical support frame of the cutting device 4 so as to be rotatable, and the rear portion of the transmission device K is connected to the threshing device 3. The power transmission device K drives the feed chain 13 and connects the mowing suspension 66 and the threshing device 3.
In the invention according to claim 4, the transmission device K is a combine in which the start end side shaft 29 of the feed chain 13 is provided in the upper portion and the input shaft 36 is provided below the start end side shaft 29. The power from the reaping device 4 side is transmitted to the input shaft 36 provided in the lower part.
According to a fifth aspect of the present invention, the feed chain 13 is configured to be pivotable outward with the pivot shaft portion 72 as an open fulcrum, and the reaping device 4 is configured to be pivotable outward with the open support portion 74 as an open fulcrum. The open fulcrum of the feed chain 13 is a combine provided on the front side of the open fulcrum of the mowing device 4, and the feed chain 13 is rotated outwardly about the pivot shaft 72 during maintenance or the like. The device 4 rotates outward using the open support portion 74 as an open fulcrum.
According to the sixth aspect of the present invention, the open fulcrum of the feed chain 13 is a combine arranged at substantially the same position as the front end of the feed chain 13, and the front end of the feed chain 13 is rotated in the vicinity of the rotation fulcrum. To open the outside of the feed chain 13.

According to the first aspect of the present invention, since the feed chain 13 is driven at the vehicle speed in the normal operation, the cereal conveyance can be smoothed and the occurrence of clogging can be suppressed, and the handling operation can be safely and easily performed at a constant speed. Since the switching between the variable speed rotation transmission path D and the constant speed rotation transmission path T is performed by the single switching motor 25, the switching configuration can be simplified.
In the invention according to claim 2, the transmission device K is arranged so as to avoid the conveyance start end portion of the feed chain 13, so the transmission device K does not hinder the cereal conveyance from the reaping device 4 to the feed chain 13.
In invention of Claim 3, the support rigidity of the transmission apparatus K can be improved, the rotational transmission efficiency to the feed chain 13 can be improved, and the rigidity of the cutting suspension stand 66 and the threshing apparatus 3 can be improved.
In invention of Claim 4, it can suppress that the input part of transmission device K interferes with the grain haul conveyance of reaping device 4 and feed chain 13, and also prevents winding of swarf etc. to transmission device K, Occurrence of poor transmission due to winding can be prevented.
In invention of Claim 5, when the feed chain 13 is opened, the side part of the threshing apparatus 3 can be largely opened, and maintenance of the feed chain 13 and the threshing apparatus 3 can be facilitated.
According to the sixth aspect of the present invention, when the feed chain 13 is opened, interference between the feed chain 13 and peripheral devices such as the cutting device 4 and the cutting suspension base 66 can be prevented, and the open amount of the feed chain 13 can be increased.

The side view of a combine. The side view of a threshing apparatus. 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 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. The side view of a threshing apparatus. The rear view.

An embodiment of the present invention will be described with reference to a combine drawing. Reference numeral 1 denotes a combiner body frame, 2 a traveling device provided below the fuselage frame 1, 3 a threshing device provided above the fuselage frame 1, and 4 a threshing. A mowing device 5 provided on the front side of the device 3, a grain tank 5 provided on the side of the threshing device 3, and a control unit 6 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. 1 is provided, a cutting blade 10 is provided on the rear side of the pulling device 9 (FIG. 1), and the harvested culm harvested by the cutting blade 10 is rearwardly on the rear side above the cutting blade 10. A chopped cereal conveying device (not shown) for conveying to the feed chain 13 of the threshing device 3 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 the 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 (FIG. 1). The waste after the threshing process is carried out by the waste chain 18.
The feed chain 13 is configured so that it can be manually handled to supply cereals to the handling room even when the machine is stopped running.
Reference numeral 15 denotes a guide rail of the feed chain 13, 16 denotes a hook provided above the feed chain 13, and 17 denotes a support frame that supports the guide rail 15.
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 transmission that is transmitted to the threshing device 3. The feed chain 13 is configured to be transmitted from either the variable speed rotation transmission path D or the constant speed rotation transmission path T (FIG. 3).

Therefore, the work can be performed smoothly in both the normal mowing work form and the handling work form.
That is, the transmission rotation transmission path D for transmitting the transmission synchronous rotation synchronized with the traveling speed, for example, transmits the rotational power from the engine 20 to the traveling device 2 by the traveling mission device 22 via the hydraulic continuously variable transmission 21. While it is configured to drive continuously variable speed and transmit the geared synchronized rotation synchronized with the traveling speed to the reaping device 4 via the traveling mission device 22, a dedicated continuously variable transmission for the reaping device 4 is provided. The feed chain 13 may be driven by a continuously variable transmission.
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 shift 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 normal work, the feed chain 13 is driven in synchronism with the cutting device 4 (vehicle speed) by the variable speed rotation transmission path D, so that the cereals are conveyed smoothly and clogging is suppressed. Further, in the handling operation, the rotation of the engine 20 is transmitted to the feed chain 13 by the constant speed rotation transmission path T as compared with the normal operation, and a small amount of cereal is manually supplied. Even in handling work, threshing is performed well, and untreated occurrence is suppressed.
Moreover, the cereal conveyance speed of the feed chain 13 is not provided with a special rotation transmission mechanism for the feed chain 13, and a constant speed rotation lower than the cereal conveyance speed during normal operation is transmitted. The safety of the work can be improved.

Moreover, since the threshing apparatus 3 and the feed chain 13 are driven by the low-speed constant speed rotation of the engine 20, energy saving is achieved.
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 input shafts to the feed chain 13, and the constant speed rotation of the threshing device 3 is applied to either the start-end side shaft 29 or the end-side shaft 31, and the start-end side shaft 29 and the end-side shaft 31. The other is the configuration in which the shift synchronous rotation from the hydraulic continuously variable transmission 21 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 a hydraulic continuously variable transmission 21 and a traveling mission device 22 from the engine 20. A drive rotation transmission path that is transmitted to the reaping device 4 through the transmission chain 4 is configured as a variable speed rotation transmission path D that is transmitted 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.

As shown in FIG. 2, reference numeral 42 denotes a tang of the threshing device 3, 43 is a first conveyor, 44 is a second conveyor, 45 is a swing sorting shelf, 46 is a suction dust exhaust fan, and each of these input pulleys 47. The drive rotation from the engine 20 is transmitted to. 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 separately provided coaxially with the gear 52. , 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 transmitted through the gear 52, the gear 53, and the intermediate gear 54 to the terminal gear of the feed chain 13. A transmission path that is transmitted to the terminal end shaft 31 of the engine 30 and reaches the terminal end shaft 31 of the feed chain 13 from the engine 20 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.
Therefore, the switching mechanism 57 can be configured compactly and simply.
The 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 rotates forward and backward by the switching motor 25. Attach to 60.
Therefore, 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, and the transmission 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, 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. 4, the tension pulley 41 is in contact with the belt 39 and the speed change clutch 23 is in the “ON” connection state. At this time, the operation transmission member 61 is pulled by the constant speed clutch 24. Thus, the pair of engaging claws 55 are separated from each other and become “cut”, and the drive transmission is cut off. On the other hand, 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 is turned off, and the operation transmission member 61 is loosened to form a pair of engaging claws 55. Are engaged, and the constant speed clutch 24 is "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. 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 supports the base portion of the vertical support frame 11 of the cutting device 4 so as to be rotatable, 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 / 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 side gear 28 and the end side gear 30 of the feed chain 13 use gears having the same number of teeth.
Therefore, the parts can be shared.
A cover 70 is provided on at least the upper surface and the front surface of the intermediate pulley 38 to surround the outer periphery of the intermediate pulley 38.
Therefore, adhesion and winding of the sawdust etc. from the feed chain 13 are suppressed.
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.

A front side portion of the rod 62 of the feed chain 13 is formed in a vertical axis and formed in a rotation shaft portion 72, and the rotation shaft portion 72 is rotatably provided in a feed chain support portion 73 provided in the body frame 1. 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.
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.
The moving side guide body 75 is provided at a predetermined position between the start end side gear 28 and the end end side shaft 31 of the feed chain 13.
For this reason, the heights of both the start-end side gear 28 and the end-side shaft 31 when rotating inward to return to the original working state can be guided to the set height, facilitating coupling joining.
A chain support 77 (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.

Therefore, in the handling mode by constant speed driving, the feed chain 13 that moves from the terminal end side shaft 31 to the start end side gear 28 may hang down on the slack side. However, the chain support 77 supports the feed chain. The movement of 13 can be stabilized.
Note that 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 in the handling mode, is arbitrary. The rotation control of the engine 20 can be easily automated, and the operability is improved, which is preferable.
The start end of the dust removal processing cylinder 78 is disposed so as to overlap the terminal end of the handling cylinder 14 of the threshing device 3 in a side view, and the terminal end of the processing chamber 79 and the start end of the dust discharge chamber 80 are communicated with each other through the communication port 81. The periphery of the terminal end of the handling cylinder 14 extended rearward from the communication port 81 is configured as a fourth processing chamber 82, and is suspended between the handling cylinder 14 and the dust processing cylinder 78 in the rear view in the fourth processing chamber 82. A wall 83 is provided.
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 by the swing sorting shelf 45 without being mixed with the product, so that the processing efficiency can be 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.

(Operation of the embodiment)
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 area where the combine can enter, and the cereals in the field are run from the vacant field to harvest and thresh.
In addition, the hand-cut cereals at the four corners of the field are usually placed for the time being, and after the harvesting and threshing work of the field is completed, the threshing apparatus 3 threshs by hand handling.
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 body is stopped, and the hand chopped grain is supplied to the feed chain 13 by the above-described manual operation to thresh.

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 the feed chain 13 is configured to transmit from either the variable speed rotation transmission path D or the constant speed rotation transmission path T, it is configured to be driven by two transmission paths of the constant speed rotation transmission path T to be transmitted. Both the normal mowing work form and the handling work form can be smoothly performed.
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, it is possible to switch between the variable speed rotation transmission path D and the constant speed rotation transmission path T simply by switching the shift clutch 23 and the constant speed clutch 24 by the switching motor 25. The operation is 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. 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 that is in contact with the belt 39 between the input pulley 37 and the intermediate pulley 38 is used 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 threshing device 3 (front plate 32 / stay 68). The transmission device K (front gear box 35), the mowing 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 mowing suspension base 66 can be 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. A large amount of outside opening can be secured.
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.
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.

  DESCRIPTION OF SYMBOLS 1 ... Airframe frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Mowing device, 5 ... Glen tank, 6 ... Steering unit, 8 ... Weeding device, 9 ... Pulling device, 10 ... Cutting blade, 11 ... Vertical support Frame, 13 ... Feed chain, 14 ... Cylinder 14, 15 ... Guide rail, 16 ... 挾 扼 杆, 17 ... Support frame, 20 ... Engine, 21 ... Hydraulic continuously variable transmission, 22 ... Travel mission device, 23 ... Shift clutch, 24 ... Constant speed clutch, 25 ... Switching motor, 27 ... Roller, 28 ... Start end side gear, 29 ... Start end side shaft, 30 ... End side gear, 31 ... End side shaft, 32 ... Front plate, 35 ... Front gear box, 36 ... Input shaft, 37 ... Input pulley, 38 ... Intermediate pulley, 39 ... Belt, 40 ... Variable speed rotating shaft, 41 ... Tension pulley, 42 ... Karatsu, 43 ... First conveyor, 44 ... Second Conveyor, 45 ... swinging sorting shelf 46 ... suction dust exhaust fan, 47 ... input pulley, 48 ... belt, 49 ... intermediate gear, 50 ... dust exhaust fan input gear, 52 ... gear, 53 ... gear, 54 ... intermediate gear, 55 ... engagement claw, 56 ... Shifter, 57 ... switching mechanism, 58 ... tension arm, 59 ... rod, 60 ... rotating body, 61 ... operation transmission member, 62 ... rod, 63 ... spring, 64 ... rear gear box, 65 ... support member, 66 ... harvesting Suspension stand, 67 ... counter shaft, 68 ... stay, 70 ... cover, 71 ... belt stopper, 72 ... rotating shaft portion, 73 ... feed chain support portion, 74 ... open support portion, 75 ... moving side guide body, 76 ... Fixed side guide body, 77 ... Chain support body, 78 ... Dust removal cylinder, 79 ... Handling chamber, 80 ... Dust removal chamber, 81 ... Communication port, 82 ... Fourth treatment chamber, 83 ... Dropping wall, 84 ... Two Panning cylinder.

Claims (6)

  A feed chain (13) for supplying and transporting the harvested culm to the threshing device (3) is provided in the harvesting device (4) in front of the machine body. The threshing device (3) is configured to transmit the driving rotation of the engine (20) at a constant gear ratio, and the feed chain (13) is synchronized with the traveling speed of the traveling device (2). ) Is a transmission / revolution transmission path (D) that transmits transmission synchronous rotation transmitted to the reaping device (4), and a constant-speed rotation transmission path (T) that is transmitted to the threshing apparatus (3) at a constant transmission ratio. ) And a transmission clutch (23) and a constant speed clutch (24) for the variable speed rotation transmission path (D) and the constant speed rotation transmission path (T), respectively. Provided, the speed change clutch (23) and the constant speed clutch (24) is configured such that when one is connected, the other is disconnected, and the switching clutch (23) and the constant speed clutch (24) are switched on and off independently. The combine configured to switch between the variable speed rotation transmission path (D) and the constant speed rotation transmission path (T).   In the invention according to claim 1, the transmission device (K) provided with the start side shaft (29) of the variable speed rotation transmission path (D) includes a front end portion of the feed chain (13) and a threshing device (3) in the front-rear direction. Combines placed between the front plates (32).   In the invention according to claim 2, the front part of the transmission device (K) is connected to a cutting suspension base (66) that supports the vertical rotation of the vertical support frame of the cutting device (4), and the transmission device (K The combine which connected the rear part to the said threshing apparatus (3) side.   4. The combine according to claim 3, wherein the transmission device (K) is provided with a start end side shaft (29) of the feed chain (13) at an upper portion and an input shaft (36) below the start end side shaft (29). In the invention of claim 1 or claim 2 or claim 3 or claim 4, the feed chain (13) is configured to be pivotable outward with the pivot shaft portion (72) as an open fulcrum, and the cutting device ( 4) is a combine in which the open support portion (74) is configured as an open fulcrum so as to be rotatable outward, and the open fulcrum of the feed chain (13) is provided in front of the open fulcrum of the mowing device (4).   6. The combine according to claim 5, wherein the open fulcrum of the feed chain (13) is disposed at substantially the same position as the front end of the feed chain (13).

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